1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2015 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_mourn (struct target_ops
*ops
);
124 static void extended_remote_restart (void);
126 static void extended_remote_mourn (struct target_ops
*);
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 sync_remote_interrupt_twice (int signo
);
144 static void interrupt_query (void);
146 static void set_general_thread (struct ptid ptid
);
147 static void set_continue_thread (struct ptid ptid
);
149 static void get_offsets (void);
151 static void skip_frame (void);
153 static long read_frame (char **buf_p
, long *sizeof_buf
);
155 static int hexnumlen (ULONGEST num
);
157 static void init_remote_ops (void);
159 static void init_extended_remote_ops (void);
161 static void remote_stop (struct target_ops
*self
, ptid_t
);
163 static int stubhex (int ch
);
165 static int hexnumstr (char *, ULONGEST
);
167 static int hexnumnstr (char *, ULONGEST
, int);
169 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
171 static void print_packet (const char *);
173 static void compare_sections_command (char *, int);
175 static void packet_command (char *, int);
177 static int stub_unpack_int (char *buff
, int fieldlength
);
179 static ptid_t
remote_current_thread (ptid_t oldptid
);
181 static int putpkt_binary (const char *buf
, int cnt
);
183 static void check_binary_download (CORE_ADDR addr
);
185 struct packet_config
;
187 static void show_packet_config_cmd (struct packet_config
*config
);
189 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
191 struct cmd_list_element
*c
,
194 static char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
195 static ptid_t
read_ptid (char *buf
, char **obuf
);
197 static void remote_set_permissions (struct target_ops
*self
);
199 static int remote_get_trace_status (struct target_ops
*self
,
200 struct trace_status
*ts
);
202 static int remote_upload_tracepoints (struct target_ops
*self
,
203 struct uploaded_tp
**utpp
);
205 static int remote_upload_trace_state_variables (struct target_ops
*self
,
206 struct uploaded_tsv
**utsvp
);
208 static void remote_query_supported (void);
210 static void remote_check_symbols (void);
212 void _initialize_remote (void);
215 static void stop_reply_xfree (struct stop_reply
*);
216 static void remote_parse_stop_reply (char *, struct stop_reply
*);
217 static void push_stop_reply (struct stop_reply
*);
218 static void discard_pending_stop_replies_in_queue (struct remote_state
*);
219 static int peek_stop_reply (ptid_t ptid
);
221 struct threads_listing_context
;
222 static void remove_new_fork_children (struct threads_listing_context
*);
224 static void remote_async_inferior_event_handler (gdb_client_data
);
226 static void remote_terminal_ours (struct target_ops
*self
);
228 static int remote_read_description_p (struct target_ops
*target
);
230 static void remote_console_output (char *msg
);
232 static int remote_supports_cond_breakpoints (struct target_ops
*self
);
234 static int remote_can_run_breakpoint_commands (struct target_ops
*self
);
236 static void remote_btrace_reset (void);
238 static int stop_reply_queue_length (void);
240 static void readahead_cache_invalidate (void);
244 static struct cmd_list_element
*remote_cmdlist
;
246 /* For "set remote" and "show remote". */
248 static struct cmd_list_element
*remote_set_cmdlist
;
249 static struct cmd_list_element
*remote_show_cmdlist
;
251 /* Stub vCont actions support.
253 Each field is a boolean flag indicating whether the stub reports
254 support for the corresponding action. */
256 struct vCont_action_support
271 /* Controls whether GDB is willing to use range stepping. */
273 static int use_range_stepping
= 1;
275 #define OPAQUETHREADBYTES 8
277 /* a 64 bit opaque identifier */
278 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
280 /* About this many threadisds fit in a packet. */
282 #define MAXTHREADLISTRESULTS 32
284 /* Data for the vFile:pread readahead cache. */
286 struct readahead_cache
288 /* The file descriptor for the file that is being cached. -1 if the
292 /* The offset into the file that the cache buffer corresponds
296 /* The buffer holding the cache contents. */
298 /* The buffer's size. We try to read as much as fits into a packet
302 /* Cache hit and miss counters. */
307 /* Description of the remote protocol state for the currently
308 connected target. This is per-target state, and independent of the
309 selected architecture. */
313 /* A buffer to use for incoming packets, and its current size. The
314 buffer is grown dynamically for larger incoming packets.
315 Outgoing packets may also be constructed in this buffer.
316 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
317 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
322 /* True if we're going through initial connection setup (finding out
323 about the remote side's threads, relocating symbols, etc.). */
326 /* If we negotiated packet size explicitly (and thus can bypass
327 heuristics for the largest packet size that will not overflow
328 a buffer in the stub), this will be set to that packet size.
329 Otherwise zero, meaning to use the guessed size. */
330 long explicit_packet_size
;
332 /* remote_wait is normally called when the target is running and
333 waits for a stop reply packet. But sometimes we need to call it
334 when the target is already stopped. We can send a "?" packet
335 and have remote_wait read the response. Or, if we already have
336 the response, we can stash it in BUF and tell remote_wait to
337 skip calling getpkt. This flag is set when BUF contains a
338 stop reply packet and the target is not waiting. */
339 int cached_wait_status
;
341 /* True, if in no ack mode. That is, neither GDB nor the stub will
342 expect acks from each other. The connection is assumed to be
346 /* True if we're connected in extended remote mode. */
349 /* True if we resumed the target and we're waiting for the target to
350 stop. In the mean time, we can't start another command/query.
351 The remote server wouldn't be ready to process it, so we'd
352 timeout waiting for a reply that would never come and eventually
353 we'd close the connection. This can happen in asynchronous mode
354 because we allow GDB commands while the target is running. */
355 int waiting_for_stop_reply
;
357 /* The status of the stub support for the various vCont actions. */
358 struct vCont_action_support supports_vCont
;
360 /* Nonzero if the user has pressed Ctrl-C, but the target hasn't
361 responded to that. */
364 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
365 remote_open knows that we don't have a file open when the program
367 struct serial
*remote_desc
;
369 /* These are the threads which we last sent to the remote system. The
370 TID member will be -1 for all or -2 for not sent yet. */
371 ptid_t general_thread
;
372 ptid_t continue_thread
;
374 /* This is the traceframe which we last selected on the remote system.
375 It will be -1 if no traceframe is selected. */
376 int remote_traceframe_number
;
378 char *last_pass_packet
;
380 /* The last QProgramSignals packet sent to the target. We bypass
381 sending a new program signals list down to the target if the new
382 packet is exactly the same as the last we sent. IOW, we only let
383 the target know about program signals list changes. */
384 char *last_program_signals_packet
;
386 enum gdb_signal last_sent_signal
;
390 char *finished_object
;
391 char *finished_annex
;
392 ULONGEST finished_offset
;
394 /* Should we try the 'ThreadInfo' query packet?
396 This variable (NOT available to the user: auto-detect only!)
397 determines whether GDB will use the new, simpler "ThreadInfo"
398 query or the older, more complex syntax for thread queries.
399 This is an auto-detect variable (set to true at each connect,
400 and set to false when the target fails to recognize it). */
401 int use_threadinfo_query
;
402 int use_threadextra_query
;
404 /* This is set to the data address of the access causing the target
405 to stop for a watchpoint. */
406 CORE_ADDR remote_watch_data_address
;
408 /* Whether the target stopped for a breakpoint/watchpoint. */
409 enum target_stop_reason stop_reason
;
411 threadref echo_nextthread
;
412 threadref nextthread
;
413 threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
415 /* The state of remote notification. */
416 struct remote_notif_state
*notif_state
;
418 /* The branch trace configuration. */
419 struct btrace_config btrace_config
;
421 /* The argument to the last "vFile:setfs:" packet we sent, used
422 to avoid sending repeated unnecessary "vFile:setfs:" packets.
423 Initialized to -1 to indicate that no "vFile:setfs:" packet
424 has yet been sent. */
427 /* A readahead cache for vFile:pread. Often, reading a binary
428 involves a sequence of small reads. E.g., when parsing an ELF
429 file. A readahead cache helps mostly the case of remote
430 debugging on a connection with higher latency, due to the
431 request/reply nature of the RSP. We only cache data for a single
432 file descriptor at a time. */
433 struct readahead_cache readahead_cache
;
436 /* Private data that we'll store in (struct thread_info)->private. */
437 struct private_thread_info
444 free_private_thread_info (struct private_thread_info
*info
)
450 /* This data could be associated with a target, but we do not always
451 have access to the current target when we need it, so for now it is
452 static. This will be fine for as long as only one target is in use
454 static struct remote_state
*remote_state
;
456 static struct remote_state
*
457 get_remote_state_raw (void)
462 /* Allocate a new struct remote_state with xmalloc, initialize it, and
465 static struct remote_state
*
466 new_remote_state (void)
468 struct remote_state
*result
= XCNEW (struct remote_state
);
470 /* The default buffer size is unimportant; it will be expanded
471 whenever a larger buffer is needed. */
472 result
->buf_size
= 400;
473 result
->buf
= (char *) xmalloc (result
->buf_size
);
474 result
->remote_traceframe_number
= -1;
475 result
->last_sent_signal
= GDB_SIGNAL_0
;
481 /* Description of the remote protocol for a given architecture. */
485 long offset
; /* Offset into G packet. */
486 long regnum
; /* GDB's internal register number. */
487 LONGEST pnum
; /* Remote protocol register number. */
488 int in_g_packet
; /* Always part of G packet. */
489 /* long size in bytes; == register_size (target_gdbarch (), regnum);
491 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
495 struct remote_arch_state
497 /* Description of the remote protocol registers. */
498 long sizeof_g_packet
;
500 /* Description of the remote protocol registers indexed by REGNUM
501 (making an array gdbarch_num_regs in size). */
502 struct packet_reg
*regs
;
504 /* This is the size (in chars) of the first response to the ``g''
505 packet. It is used as a heuristic when determining the maximum
506 size of memory-read and memory-write packets. A target will
507 typically only reserve a buffer large enough to hold the ``g''
508 packet. The size does not include packet overhead (headers and
510 long actual_register_packet_size
;
512 /* This is the maximum size (in chars) of a non read/write packet.
513 It is also used as a cap on the size of read/write packets. */
514 long remote_packet_size
;
517 /* Utility: generate error from an incoming stub packet. */
519 trace_error (char *buf
)
522 return; /* not an error msg */
525 case '1': /* malformed packet error */
526 if (*++buf
== '0') /* general case: */
527 error (_("remote.c: error in outgoing packet."));
529 error (_("remote.c: error in outgoing packet at field #%ld."),
530 strtol (buf
, NULL
, 16));
532 error (_("Target returns error code '%s'."), buf
);
536 /* Utility: wait for reply from stub, while accepting "O" packets. */
538 remote_get_noisy_reply (char **buf_p
,
541 do /* Loop on reply from remote stub. */
545 QUIT
; /* Allow user to bail out with ^C. */
546 getpkt (buf_p
, sizeof_buf
, 0);
550 else if (startswith (buf
, "qRelocInsn:"))
553 CORE_ADDR from
, to
, org_to
;
555 int adjusted_size
= 0;
558 p
= buf
+ strlen ("qRelocInsn:");
559 pp
= unpack_varlen_hex (p
, &ul
);
561 error (_("invalid qRelocInsn packet: %s"), buf
);
565 unpack_varlen_hex (p
, &ul
);
572 gdbarch_relocate_instruction (target_gdbarch (), &to
, from
);
575 CATCH (ex
, RETURN_MASK_ALL
)
577 if (ex
.error
== MEMORY_ERROR
)
579 /* Propagate memory errors silently back to the
580 target. The stub may have limited the range of
581 addresses we can write to, for example. */
585 /* Something unexpectedly bad happened. Be verbose
586 so we can tell what, and propagate the error back
587 to the stub, so it doesn't get stuck waiting for
589 exception_fprintf (gdb_stderr
, ex
,
590 _("warning: relocating instruction: "));
598 adjusted_size
= to
- org_to
;
600 xsnprintf (buf
, *sizeof_buf
, "qRelocInsn:%x", adjusted_size
);
604 else if (buf
[0] == 'O' && buf
[1] != 'K')
605 remote_console_output (buf
+ 1); /* 'O' message from stub */
607 return buf
; /* Here's the actual reply. */
612 /* Handle for retreving the remote protocol data from gdbarch. */
613 static struct gdbarch_data
*remote_gdbarch_data_handle
;
615 static struct remote_arch_state
*
616 get_remote_arch_state (void)
618 gdb_assert (target_gdbarch () != NULL
);
619 return ((struct remote_arch_state
*)
620 gdbarch_data (target_gdbarch (), remote_gdbarch_data_handle
));
623 /* Fetch the global remote target state. */
625 static struct remote_state
*
626 get_remote_state (void)
628 /* Make sure that the remote architecture state has been
629 initialized, because doing so might reallocate rs->buf. Any
630 function which calls getpkt also needs to be mindful of changes
631 to rs->buf, but this call limits the number of places which run
633 get_remote_arch_state ();
635 return get_remote_state_raw ();
638 /* Cleanup routine for the remote module's pspace data. */
641 remote_pspace_data_cleanup (struct program_space
*pspace
, void *arg
)
643 char *remote_exec_file
= (char *) arg
;
645 xfree (remote_exec_file
);
648 /* Fetch the remote exec-file from the current program space. */
651 get_remote_exec_file (void)
653 char *remote_exec_file
;
656 = (char *) program_space_data (current_program_space
,
658 if (remote_exec_file
== NULL
)
661 return remote_exec_file
;
664 /* Set the remote exec file for PSPACE. */
667 set_pspace_remote_exec_file (struct program_space
*pspace
,
668 char *remote_exec_file
)
670 char *old_file
= (char *) program_space_data (pspace
, remote_pspace_data
);
673 set_program_space_data (pspace
, remote_pspace_data
,
674 xstrdup (remote_exec_file
));
677 /* The "set/show remote exec-file" set command hook. */
680 set_remote_exec_file (char *ignored
, int from_tty
,
681 struct cmd_list_element
*c
)
683 gdb_assert (remote_exec_file_var
!= NULL
);
684 set_pspace_remote_exec_file (current_program_space
, remote_exec_file_var
);
687 /* The "set/show remote exec-file" show command hook. */
690 show_remote_exec_file (struct ui_file
*file
, int from_tty
,
691 struct cmd_list_element
*cmd
, const char *value
)
693 fprintf_filtered (file
, "%s\n", remote_exec_file_var
);
697 compare_pnums (const void *lhs_
, const void *rhs_
)
699 const struct packet_reg
* const *lhs
700 = (const struct packet_reg
* const *) lhs_
;
701 const struct packet_reg
* const *rhs
702 = (const struct packet_reg
* const *) rhs_
;
704 if ((*lhs
)->pnum
< (*rhs
)->pnum
)
706 else if ((*lhs
)->pnum
== (*rhs
)->pnum
)
713 map_regcache_remote_table (struct gdbarch
*gdbarch
, struct packet_reg
*regs
)
715 int regnum
, num_remote_regs
, offset
;
716 struct packet_reg
**remote_regs
;
718 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
720 struct packet_reg
*r
= ®s
[regnum
];
722 if (register_size (gdbarch
, regnum
) == 0)
723 /* Do not try to fetch zero-sized (placeholder) registers. */
726 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
731 /* Define the g/G packet format as the contents of each register
732 with a remote protocol number, in order of ascending protocol
735 remote_regs
= XALLOCAVEC (struct packet_reg
*, gdbarch_num_regs (gdbarch
));
736 for (num_remote_regs
= 0, regnum
= 0;
737 regnum
< gdbarch_num_regs (gdbarch
);
739 if (regs
[regnum
].pnum
!= -1)
740 remote_regs
[num_remote_regs
++] = ®s
[regnum
];
742 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
745 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
747 remote_regs
[regnum
]->in_g_packet
= 1;
748 remote_regs
[regnum
]->offset
= offset
;
749 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
755 /* Given the architecture described by GDBARCH, return the remote
756 protocol register's number and the register's offset in the g/G
757 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
758 If the target does not have a mapping for REGNUM, return false,
759 otherwise, return true. */
762 remote_register_number_and_offset (struct gdbarch
*gdbarch
, int regnum
,
763 int *pnum
, int *poffset
)
766 struct packet_reg
*regs
;
767 struct cleanup
*old_chain
;
769 gdb_assert (regnum
< gdbarch_num_regs (gdbarch
));
771 regs
= XCNEWVEC (struct packet_reg
, gdbarch_num_regs (gdbarch
));
772 old_chain
= make_cleanup (xfree
, regs
);
774 sizeof_g_packet
= map_regcache_remote_table (gdbarch
, regs
);
776 *pnum
= regs
[regnum
].pnum
;
777 *poffset
= regs
[regnum
].offset
;
779 do_cleanups (old_chain
);
785 init_remote_state (struct gdbarch
*gdbarch
)
787 struct remote_state
*rs
= get_remote_state_raw ();
788 struct remote_arch_state
*rsa
;
790 rsa
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_arch_state
);
792 /* Use the architecture to build a regnum<->pnum table, which will be
793 1:1 unless a feature set specifies otherwise. */
794 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
,
795 gdbarch_num_regs (gdbarch
),
798 /* Record the maximum possible size of the g packet - it may turn out
800 rsa
->sizeof_g_packet
= map_regcache_remote_table (gdbarch
, rsa
->regs
);
802 /* Default maximum number of characters in a packet body. Many
803 remote stubs have a hardwired buffer size of 400 bytes
804 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
805 as the maximum packet-size to ensure that the packet and an extra
806 NUL character can always fit in the buffer. This stops GDB
807 trashing stubs that try to squeeze an extra NUL into what is
808 already a full buffer (As of 1999-12-04 that was most stubs). */
809 rsa
->remote_packet_size
= 400 - 1;
811 /* This one is filled in when a ``g'' packet is received. */
812 rsa
->actual_register_packet_size
= 0;
814 /* Should rsa->sizeof_g_packet needs more space than the
815 default, adjust the size accordingly. Remember that each byte is
816 encoded as two characters. 32 is the overhead for the packet
817 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
818 (``$NN:G...#NN'') is a better guess, the below has been padded a
820 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
821 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
823 /* Make sure that the packet buffer is plenty big enough for
824 this architecture. */
825 if (rs
->buf_size
< rsa
->remote_packet_size
)
827 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
828 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
834 /* Return the current allowed size of a remote packet. This is
835 inferred from the current architecture, and should be used to
836 limit the length of outgoing packets. */
838 get_remote_packet_size (void)
840 struct remote_state
*rs
= get_remote_state ();
841 struct remote_arch_state
*rsa
= get_remote_arch_state ();
843 if (rs
->explicit_packet_size
)
844 return rs
->explicit_packet_size
;
846 return rsa
->remote_packet_size
;
849 static struct packet_reg
*
850 packet_reg_from_regnum (struct remote_arch_state
*rsa
, long regnum
)
852 if (regnum
< 0 && regnum
>= gdbarch_num_regs (target_gdbarch ()))
856 struct packet_reg
*r
= &rsa
->regs
[regnum
];
858 gdb_assert (r
->regnum
== regnum
);
863 static struct packet_reg
*
864 packet_reg_from_pnum (struct remote_arch_state
*rsa
, LONGEST pnum
)
868 for (i
= 0; i
< gdbarch_num_regs (target_gdbarch ()); i
++)
870 struct packet_reg
*r
= &rsa
->regs
[i
];
878 static struct target_ops remote_ops
;
880 static struct target_ops extended_remote_ops
;
882 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
883 ``forever'' still use the normal timeout mechanism. This is
884 currently used by the ASYNC code to guarentee that target reads
885 during the initial connect always time-out. Once getpkt has been
886 modified to return a timeout indication and, in turn
887 remote_wait()/wait_for_inferior() have gained a timeout parameter
889 static int wait_forever_enabled_p
= 1;
891 /* Allow the user to specify what sequence to send to the remote
892 when he requests a program interruption: Although ^C is usually
893 what remote systems expect (this is the default, here), it is
894 sometimes preferable to send a break. On other systems such
895 as the Linux kernel, a break followed by g, which is Magic SysRq g
896 is required in order to interrupt the execution. */
897 const char interrupt_sequence_control_c
[] = "Ctrl-C";
898 const char interrupt_sequence_break
[] = "BREAK";
899 const char interrupt_sequence_break_g
[] = "BREAK-g";
900 static const char *const interrupt_sequence_modes
[] =
902 interrupt_sequence_control_c
,
903 interrupt_sequence_break
,
904 interrupt_sequence_break_g
,
907 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
910 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
911 struct cmd_list_element
*c
,
914 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
915 fprintf_filtered (file
,
916 _("Send the ASCII ETX character (Ctrl-c) "
917 "to the remote target to interrupt the "
918 "execution of the program.\n"));
919 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
920 fprintf_filtered (file
,
921 _("send a break signal to the remote target "
922 "to interrupt the execution of the program.\n"));
923 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
924 fprintf_filtered (file
,
925 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
926 "the remote target to interrupt the execution "
927 "of Linux kernel.\n"));
929 internal_error (__FILE__
, __LINE__
,
930 _("Invalid value for interrupt_sequence_mode: %s."),
931 interrupt_sequence_mode
);
934 /* This boolean variable specifies whether interrupt_sequence is sent
935 to the remote target when gdb connects to it.
936 This is mostly needed when you debug the Linux kernel: The Linux kernel
937 expects BREAK g which is Magic SysRq g for connecting gdb. */
938 static int interrupt_on_connect
= 0;
940 /* This variable is used to implement the "set/show remotebreak" commands.
941 Since these commands are now deprecated in favor of "set/show remote
942 interrupt-sequence", it no longer has any effect on the code. */
943 static int remote_break
;
946 set_remotebreak (char *args
, int from_tty
, struct cmd_list_element
*c
)
949 interrupt_sequence_mode
= interrupt_sequence_break
;
951 interrupt_sequence_mode
= interrupt_sequence_control_c
;
955 show_remotebreak (struct ui_file
*file
, int from_tty
,
956 struct cmd_list_element
*c
,
961 /* This variable sets the number of bits in an address that are to be
962 sent in a memory ("M" or "m") packet. Normally, after stripping
963 leading zeros, the entire address would be sent. This variable
964 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
965 initial implementation of remote.c restricted the address sent in
966 memory packets to ``host::sizeof long'' bytes - (typically 32
967 bits). Consequently, for 64 bit targets, the upper 32 bits of an
968 address was never sent. Since fixing this bug may cause a break in
969 some remote targets this variable is principly provided to
970 facilitate backward compatibility. */
972 static unsigned int remote_address_size
;
974 /* Temporary to track who currently owns the terminal. See
975 remote_terminal_* for more details. */
977 static int remote_async_terminal_ours_p
;
980 /* User configurable variables for the number of characters in a
981 memory read/write packet. MIN (rsa->remote_packet_size,
982 rsa->sizeof_g_packet) is the default. Some targets need smaller
983 values (fifo overruns, et.al.) and some users need larger values
984 (speed up transfers). The variables ``preferred_*'' (the user
985 request), ``current_*'' (what was actually set) and ``forced_*''
986 (Positive - a soft limit, negative - a hard limit). */
988 struct memory_packet_config
995 /* The default max memory-write-packet-size. The 16k is historical.
996 (It came from older GDB's using alloca for buffers and the
997 knowledge (folklore?) that some hosts don't cope very well with
998 large alloca calls.) */
999 #define DEFAULT_MAX_MEMORY_PACKET_SIZE 16384
1001 /* The minimum remote packet size for memory transfers. Ensures we
1002 can write at least one byte. */
1003 #define MIN_MEMORY_PACKET_SIZE 20
1005 /* Compute the current size of a read/write packet. Since this makes
1006 use of ``actual_register_packet_size'' the computation is dynamic. */
1009 get_memory_packet_size (struct memory_packet_config
*config
)
1011 struct remote_state
*rs
= get_remote_state ();
1012 struct remote_arch_state
*rsa
= get_remote_arch_state ();
1015 if (config
->fixed_p
)
1017 if (config
->size
<= 0)
1018 what_they_get
= DEFAULT_MAX_MEMORY_PACKET_SIZE
;
1020 what_they_get
= config
->size
;
1024 what_they_get
= get_remote_packet_size ();
1025 /* Limit the packet to the size specified by the user. */
1026 if (config
->size
> 0
1027 && what_they_get
> config
->size
)
1028 what_they_get
= config
->size
;
1030 /* Limit it to the size of the targets ``g'' response unless we have
1031 permission from the stub to use a larger packet size. */
1032 if (rs
->explicit_packet_size
== 0
1033 && rsa
->actual_register_packet_size
> 0
1034 && what_they_get
> rsa
->actual_register_packet_size
)
1035 what_they_get
= rsa
->actual_register_packet_size
;
1037 if (what_they_get
< MIN_MEMORY_PACKET_SIZE
)
1038 what_they_get
= MIN_MEMORY_PACKET_SIZE
;
1040 /* Make sure there is room in the global buffer for this packet
1041 (including its trailing NUL byte). */
1042 if (rs
->buf_size
< what_they_get
+ 1)
1044 rs
->buf_size
= 2 * what_they_get
;
1045 rs
->buf
= (char *) xrealloc (rs
->buf
, 2 * what_they_get
);
1048 return what_they_get
;
1051 /* Update the size of a read/write packet. If they user wants
1052 something really big then do a sanity check. */
1055 set_memory_packet_size (char *args
, struct memory_packet_config
*config
)
1057 int fixed_p
= config
->fixed_p
;
1058 long size
= config
->size
;
1061 error (_("Argument required (integer, `fixed' or `limited')."));
1062 else if (strcmp (args
, "hard") == 0
1063 || strcmp (args
, "fixed") == 0)
1065 else if (strcmp (args
, "soft") == 0
1066 || strcmp (args
, "limit") == 0)
1072 size
= strtoul (args
, &end
, 0);
1074 error (_("Invalid %s (bad syntax)."), config
->name
);
1076 /* Instead of explicitly capping the size of a packet to or
1077 disallowing it, the user is allowed to set the size to
1078 something arbitrarily large. */
1081 /* So that the query shows the correct value. */
1083 size
= DEFAULT_MAX_MEMORY_PACKET_SIZE
;
1086 if (fixed_p
&& !config
->fixed_p
)
1088 if (! query (_("The target may not be able to correctly handle a %s\n"
1089 "of %ld bytes. Change the packet size? "),
1090 config
->name
, size
))
1091 error (_("Packet size not changed."));
1093 /* Update the config. */
1094 config
->fixed_p
= fixed_p
;
1095 config
->size
= size
;
1099 show_memory_packet_size (struct memory_packet_config
*config
)
1101 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
1102 if (config
->fixed_p
)
1103 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1104 get_memory_packet_size (config
));
1106 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1107 get_memory_packet_size (config
));
1110 static struct memory_packet_config memory_write_packet_config
=
1112 "memory-write-packet-size",
1116 set_memory_write_packet_size (char *args
, int from_tty
)
1118 set_memory_packet_size (args
, &memory_write_packet_config
);
1122 show_memory_write_packet_size (char *args
, int from_tty
)
1124 show_memory_packet_size (&memory_write_packet_config
);
1128 get_memory_write_packet_size (void)
1130 return get_memory_packet_size (&memory_write_packet_config
);
1133 static struct memory_packet_config memory_read_packet_config
=
1135 "memory-read-packet-size",
1139 set_memory_read_packet_size (char *args
, int from_tty
)
1141 set_memory_packet_size (args
, &memory_read_packet_config
);
1145 show_memory_read_packet_size (char *args
, int from_tty
)
1147 show_memory_packet_size (&memory_read_packet_config
);
1151 get_memory_read_packet_size (void)
1153 long size
= get_memory_packet_size (&memory_read_packet_config
);
1155 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1156 extra buffer size argument before the memory read size can be
1157 increased beyond this. */
1158 if (size
> get_remote_packet_size ())
1159 size
= get_remote_packet_size ();
1164 /* Generic configuration support for packets the stub optionally
1165 supports. Allows the user to specify the use of the packet as well
1166 as allowing GDB to auto-detect support in the remote stub. */
1170 PACKET_SUPPORT_UNKNOWN
= 0,
1175 struct packet_config
1180 /* If auto, GDB auto-detects support for this packet or feature,
1181 either through qSupported, or by trying the packet and looking
1182 at the response. If true, GDB assumes the target supports this
1183 packet. If false, the packet is disabled. Configs that don't
1184 have an associated command always have this set to auto. */
1185 enum auto_boolean detect
;
1187 /* Does the target support this packet? */
1188 enum packet_support support
;
1191 /* Analyze a packet's return value and update the packet config
1201 static enum packet_support
packet_config_support (struct packet_config
*config
);
1202 static enum packet_support
packet_support (int packet
);
1205 show_packet_config_cmd (struct packet_config
*config
)
1207 char *support
= "internal-error";
1209 switch (packet_config_support (config
))
1212 support
= "enabled";
1214 case PACKET_DISABLE
:
1215 support
= "disabled";
1217 case PACKET_SUPPORT_UNKNOWN
:
1218 support
= "unknown";
1221 switch (config
->detect
)
1223 case AUTO_BOOLEAN_AUTO
:
1224 printf_filtered (_("Support for the `%s' packet "
1225 "is auto-detected, currently %s.\n"),
1226 config
->name
, support
);
1228 case AUTO_BOOLEAN_TRUE
:
1229 case AUTO_BOOLEAN_FALSE
:
1230 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1231 config
->name
, support
);
1237 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1238 const char *title
, int legacy
)
1244 config
->name
= name
;
1245 config
->title
= title
;
1246 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1248 show_doc
= xstrprintf ("Show current use of remote "
1249 "protocol `%s' (%s) packet",
1251 /* set/show TITLE-packet {auto,on,off} */
1252 cmd_name
= xstrprintf ("%s-packet", title
);
1253 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1254 &config
->detect
, set_doc
,
1255 show_doc
, NULL
, /* help_doc */
1257 show_remote_protocol_packet_cmd
,
1258 &remote_set_cmdlist
, &remote_show_cmdlist
);
1259 /* The command code copies the documentation strings. */
1262 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1267 legacy_name
= xstrprintf ("%s-packet", name
);
1268 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1269 &remote_set_cmdlist
);
1270 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1271 &remote_show_cmdlist
);
1275 static enum packet_result
1276 packet_check_result (const char *buf
)
1280 /* The stub recognized the packet request. Check that the
1281 operation succeeded. */
1283 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1285 /* "Enn" - definitly an error. */
1286 return PACKET_ERROR
;
1288 /* Always treat "E." as an error. This will be used for
1289 more verbose error messages, such as E.memtypes. */
1290 if (buf
[0] == 'E' && buf
[1] == '.')
1291 return PACKET_ERROR
;
1293 /* The packet may or may not be OK. Just assume it is. */
1297 /* The stub does not support the packet. */
1298 return PACKET_UNKNOWN
;
1301 static enum packet_result
1302 packet_ok (const char *buf
, struct packet_config
*config
)
1304 enum packet_result result
;
1306 if (config
->detect
!= AUTO_BOOLEAN_TRUE
1307 && config
->support
== PACKET_DISABLE
)
1308 internal_error (__FILE__
, __LINE__
,
1309 _("packet_ok: attempt to use a disabled packet"));
1311 result
= packet_check_result (buf
);
1316 /* The stub recognized the packet request. */
1317 if (config
->support
== PACKET_SUPPORT_UNKNOWN
)
1320 fprintf_unfiltered (gdb_stdlog
,
1321 "Packet %s (%s) is supported\n",
1322 config
->name
, config
->title
);
1323 config
->support
= PACKET_ENABLE
;
1326 case PACKET_UNKNOWN
:
1327 /* The stub does not support the packet. */
1328 if (config
->detect
== AUTO_BOOLEAN_AUTO
1329 && config
->support
== PACKET_ENABLE
)
1331 /* If the stub previously indicated that the packet was
1332 supported then there is a protocol error. */
1333 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1334 config
->name
, config
->title
);
1336 else if (config
->detect
== AUTO_BOOLEAN_TRUE
)
1338 /* The user set it wrong. */
1339 error (_("Enabled packet %s (%s) not recognized by stub"),
1340 config
->name
, config
->title
);
1344 fprintf_unfiltered (gdb_stdlog
,
1345 "Packet %s (%s) is NOT supported\n",
1346 config
->name
, config
->title
);
1347 config
->support
= PACKET_DISABLE
;
1368 PACKET_vFile_pwrite
,
1370 PACKET_vFile_unlink
,
1371 PACKET_vFile_readlink
,
1374 PACKET_qXfer_features
,
1375 PACKET_qXfer_exec_file
,
1376 PACKET_qXfer_libraries
,
1377 PACKET_qXfer_libraries_svr4
,
1378 PACKET_qXfer_memory_map
,
1379 PACKET_qXfer_spu_read
,
1380 PACKET_qXfer_spu_write
,
1381 PACKET_qXfer_osdata
,
1382 PACKET_qXfer_threads
,
1383 PACKET_qXfer_statictrace_read
,
1384 PACKET_qXfer_traceframe_info
,
1390 PACKET_QPassSignals
,
1391 PACKET_QProgramSignals
,
1393 PACKET_qSearch_memory
,
1396 PACKET_QStartNoAckMode
,
1398 PACKET_qXfer_siginfo_read
,
1399 PACKET_qXfer_siginfo_write
,
1402 /* Support for conditional tracepoints. */
1403 PACKET_ConditionalTracepoints
,
1405 /* Support for target-side breakpoint conditions. */
1406 PACKET_ConditionalBreakpoints
,
1408 /* Support for target-side breakpoint commands. */
1409 PACKET_BreakpointCommands
,
1411 /* Support for fast tracepoints. */
1412 PACKET_FastTracepoints
,
1414 /* Support for static tracepoints. */
1415 PACKET_StaticTracepoints
,
1417 /* Support for installing tracepoints while a trace experiment is
1419 PACKET_InstallInTrace
,
1423 PACKET_TracepointSource
,
1426 PACKET_QDisableRandomization
,
1428 PACKET_QTBuffer_size
,
1432 PACKET_qXfer_btrace
,
1434 /* Support for the QNonStop packet. */
1437 /* Support for multi-process extensions. */
1438 PACKET_multiprocess_feature
,
1440 /* Support for enabling and disabling tracepoints while a trace
1441 experiment is running. */
1442 PACKET_EnableDisableTracepoints_feature
,
1444 /* Support for collecting strings using the tracenz bytecode. */
1445 PACKET_tracenz_feature
,
1447 /* Support for continuing to run a trace experiment while GDB is
1449 PACKET_DisconnectedTracing_feature
,
1451 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
1452 PACKET_augmented_libraries_svr4_read_feature
,
1454 /* Support for the qXfer:btrace-conf:read packet. */
1455 PACKET_qXfer_btrace_conf
,
1457 /* Support for the Qbtrace-conf:bts:size packet. */
1458 PACKET_Qbtrace_conf_bts_size
,
1460 /* Support for swbreak+ feature. */
1461 PACKET_swbreak_feature
,
1463 /* Support for hwbreak+ feature. */
1464 PACKET_hwbreak_feature
,
1466 /* Support for fork events. */
1467 PACKET_fork_event_feature
,
1469 /* Support for vfork events. */
1470 PACKET_vfork_event_feature
,
1472 /* Support for the Qbtrace-conf:pt:size packet. */
1473 PACKET_Qbtrace_conf_pt_size
,
1475 /* Support for exec events. */
1476 PACKET_exec_event_feature
,
1478 /* Support for query supported vCont actions. */
1479 PACKET_vContSupported
,
1484 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
1486 /* Returns the packet's corresponding "set remote foo-packet" command
1487 state. See struct packet_config for more details. */
1489 static enum auto_boolean
1490 packet_set_cmd_state (int packet
)
1492 return remote_protocol_packets
[packet
].detect
;
1495 /* Returns whether a given packet or feature is supported. This takes
1496 into account the state of the corresponding "set remote foo-packet"
1497 command, which may be used to bypass auto-detection. */
1499 static enum packet_support
1500 packet_config_support (struct packet_config
*config
)
1502 switch (config
->detect
)
1504 case AUTO_BOOLEAN_TRUE
:
1505 return PACKET_ENABLE
;
1506 case AUTO_BOOLEAN_FALSE
:
1507 return PACKET_DISABLE
;
1508 case AUTO_BOOLEAN_AUTO
:
1509 return config
->support
;
1511 gdb_assert_not_reached (_("bad switch"));
1515 /* Same as packet_config_support, but takes the packet's enum value as
1518 static enum packet_support
1519 packet_support (int packet
)
1521 struct packet_config
*config
= &remote_protocol_packets
[packet
];
1523 return packet_config_support (config
);
1527 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
1528 struct cmd_list_element
*c
,
1531 struct packet_config
*packet
;
1533 for (packet
= remote_protocol_packets
;
1534 packet
< &remote_protocol_packets
[PACKET_MAX
];
1537 if (&packet
->detect
== c
->var
)
1539 show_packet_config_cmd (packet
);
1543 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
1547 /* Should we try one of the 'Z' requests? */
1551 Z_PACKET_SOFTWARE_BP
,
1552 Z_PACKET_HARDWARE_BP
,
1559 /* For compatibility with older distributions. Provide a ``set remote
1560 Z-packet ...'' command that updates all the Z packet types. */
1562 static enum auto_boolean remote_Z_packet_detect
;
1565 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
1566 struct cmd_list_element
*c
)
1570 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1571 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
1575 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
1576 struct cmd_list_element
*c
,
1581 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1583 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1587 /* Returns true if the multi-process extensions are in effect. */
1590 remote_multi_process_p (struct remote_state
*rs
)
1592 return packet_support (PACKET_multiprocess_feature
) == PACKET_ENABLE
;
1595 /* Returns true if fork events are supported. */
1598 remote_fork_event_p (struct remote_state
*rs
)
1600 return packet_support (PACKET_fork_event_feature
) == PACKET_ENABLE
;
1603 /* Returns true if vfork events are supported. */
1606 remote_vfork_event_p (struct remote_state
*rs
)
1608 return packet_support (PACKET_vfork_event_feature
) == PACKET_ENABLE
;
1611 /* Returns true if exec events are supported. */
1614 remote_exec_event_p (struct remote_state
*rs
)
1616 return packet_support (PACKET_exec_event_feature
) == PACKET_ENABLE
;
1619 /* Insert fork catchpoint target routine. If fork events are enabled
1620 then return success, nothing more to do. */
1623 remote_insert_fork_catchpoint (struct target_ops
*ops
, int pid
)
1625 struct remote_state
*rs
= get_remote_state ();
1627 return !remote_fork_event_p (rs
);
1630 /* Remove fork catchpoint target routine. Nothing to do, just
1634 remote_remove_fork_catchpoint (struct target_ops
*ops
, int pid
)
1639 /* Insert vfork catchpoint target routine. If vfork events are enabled
1640 then return success, nothing more to do. */
1643 remote_insert_vfork_catchpoint (struct target_ops
*ops
, int pid
)
1645 struct remote_state
*rs
= get_remote_state ();
1647 return !remote_vfork_event_p (rs
);
1650 /* Remove vfork catchpoint target routine. Nothing to do, just
1654 remote_remove_vfork_catchpoint (struct target_ops
*ops
, int pid
)
1659 /* Insert exec catchpoint target routine. If exec events are
1660 enabled, just return success. */
1663 remote_insert_exec_catchpoint (struct target_ops
*ops
, int pid
)
1665 struct remote_state
*rs
= get_remote_state ();
1667 return !remote_exec_event_p (rs
);
1670 /* Remove exec catchpoint target routine. Nothing to do, just
1674 remote_remove_exec_catchpoint (struct target_ops
*ops
, int pid
)
1679 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1680 static struct async_signal_handler
*async_sigint_remote_twice_token
;
1681 static struct async_signal_handler
*async_sigint_remote_token
;
1684 /* Asynchronous signal handle registered as event loop source for
1685 when we have pending events ready to be passed to the core. */
1687 static struct async_event_handler
*remote_async_inferior_event_token
;
1691 static ptid_t magic_null_ptid
;
1692 static ptid_t not_sent_ptid
;
1693 static ptid_t any_thread_ptid
;
1695 /* Find out if the stub attached to PID (and hence GDB should offer to
1696 detach instead of killing it when bailing out). */
1699 remote_query_attached (int pid
)
1701 struct remote_state
*rs
= get_remote_state ();
1702 size_t size
= get_remote_packet_size ();
1704 if (packet_support (PACKET_qAttached
) == PACKET_DISABLE
)
1707 if (remote_multi_process_p (rs
))
1708 xsnprintf (rs
->buf
, size
, "qAttached:%x", pid
);
1710 xsnprintf (rs
->buf
, size
, "qAttached");
1713 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1715 switch (packet_ok (rs
->buf
,
1716 &remote_protocol_packets
[PACKET_qAttached
]))
1719 if (strcmp (rs
->buf
, "1") == 0)
1723 warning (_("Remote failure reply: %s"), rs
->buf
);
1725 case PACKET_UNKNOWN
:
1732 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
1733 has been invented by GDB, instead of reported by the target. Since
1734 we can be connected to a remote system before before knowing about
1735 any inferior, mark the target with execution when we find the first
1736 inferior. If ATTACHED is 1, then we had just attached to this
1737 inferior. If it is 0, then we just created this inferior. If it
1738 is -1, then try querying the remote stub to find out if it had
1739 attached to the inferior or not. If TRY_OPEN_EXEC is true then
1740 attempt to open this inferior's executable as the main executable
1741 if no main executable is open already. */
1743 static struct inferior
*
1744 remote_add_inferior (int fake_pid_p
, int pid
, int attached
,
1747 struct inferior
*inf
;
1749 /* Check whether this process we're learning about is to be
1750 considered attached, or if is to be considered to have been
1751 spawned by the stub. */
1753 attached
= remote_query_attached (pid
);
1755 if (gdbarch_has_global_solist (target_gdbarch ()))
1757 /* If the target shares code across all inferiors, then every
1758 attach adds a new inferior. */
1759 inf
= add_inferior (pid
);
1761 /* ... and every inferior is bound to the same program space.
1762 However, each inferior may still have its own address
1764 inf
->aspace
= maybe_new_address_space ();
1765 inf
->pspace
= current_program_space
;
1769 /* In the traditional debugging scenario, there's a 1-1 match
1770 between program/address spaces. We simply bind the inferior
1771 to the program space's address space. */
1772 inf
= current_inferior ();
1773 inferior_appeared (inf
, pid
);
1776 inf
->attach_flag
= attached
;
1777 inf
->fake_pid_p
= fake_pid_p
;
1779 /* If no main executable is currently open then attempt to
1780 open the file that was executed to create this inferior. */
1781 if (try_open_exec
&& get_exec_file (0) == NULL
)
1782 exec_file_locate_attach (pid
, 1);
1787 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1788 according to RUNNING. */
1791 remote_add_thread (ptid_t ptid
, int running
)
1793 struct remote_state
*rs
= get_remote_state ();
1795 /* GDB historically didn't pull threads in the initial connection
1796 setup. If the remote target doesn't even have a concept of
1797 threads (e.g., a bare-metal target), even if internally we
1798 consider that a single-threaded target, mentioning a new thread
1799 might be confusing to the user. Be silent then, preserving the
1800 age old behavior. */
1801 if (rs
->starting_up
)
1802 add_thread_silent (ptid
);
1806 set_executing (ptid
, running
);
1807 set_running (ptid
, running
);
1810 /* Come here when we learn about a thread id from the remote target.
1811 It may be the first time we hear about such thread, so take the
1812 opportunity to add it to GDB's thread list. In case this is the
1813 first time we're noticing its corresponding inferior, add it to
1814 GDB's inferior list as well. */
1817 remote_notice_new_inferior (ptid_t currthread
, int running
)
1819 /* If this is a new thread, add it to GDB's thread list.
1820 If we leave it up to WFI to do this, bad things will happen. */
1822 if (in_thread_list (currthread
) && is_exited (currthread
))
1824 /* We're seeing an event on a thread id we knew had exited.
1825 This has to be a new thread reusing the old id. Add it. */
1826 remote_add_thread (currthread
, running
);
1830 if (!in_thread_list (currthread
))
1832 struct inferior
*inf
= NULL
;
1833 int pid
= ptid_get_pid (currthread
);
1835 if (ptid_is_pid (inferior_ptid
)
1836 && pid
== ptid_get_pid (inferior_ptid
))
1838 /* inferior_ptid has no thread member yet. This can happen
1839 with the vAttach -> remote_wait,"TAAthread:" path if the
1840 stub doesn't support qC. This is the first stop reported
1841 after an attach, so this is the main thread. Update the
1842 ptid in the thread list. */
1843 if (in_thread_list (pid_to_ptid (pid
)))
1844 thread_change_ptid (inferior_ptid
, currthread
);
1847 remote_add_thread (currthread
, running
);
1848 inferior_ptid
= currthread
;
1853 if (ptid_equal (magic_null_ptid
, inferior_ptid
))
1855 /* inferior_ptid is not set yet. This can happen with the
1856 vRun -> remote_wait,"TAAthread:" path if the stub
1857 doesn't support qC. This is the first stop reported
1858 after an attach, so this is the main thread. Update the
1859 ptid in the thread list. */
1860 thread_change_ptid (inferior_ptid
, currthread
);
1864 /* When connecting to a target remote, or to a target
1865 extended-remote which already was debugging an inferior, we
1866 may not know about it yet. Add it before adding its child
1867 thread, so notifications are emitted in a sensible order. */
1868 if (!in_inferior_list (ptid_get_pid (currthread
)))
1870 struct remote_state
*rs
= get_remote_state ();
1871 int fake_pid_p
= !remote_multi_process_p (rs
);
1873 inf
= remote_add_inferior (fake_pid_p
,
1874 ptid_get_pid (currthread
), -1, 1);
1877 /* This is really a new thread. Add it. */
1878 remote_add_thread (currthread
, running
);
1880 /* If we found a new inferior, let the common code do whatever
1881 it needs to with it (e.g., read shared libraries, insert
1882 breakpoints), unless we're just setting up an all-stop
1886 struct remote_state
*rs
= get_remote_state ();
1888 if (non_stop
|| !rs
->starting_up
)
1889 notice_new_inferior (currthread
, running
, 0);
1894 /* Return the private thread data, creating it if necessary. */
1896 static struct private_thread_info
*
1897 demand_private_info (ptid_t ptid
)
1899 struct thread_info
*info
= find_thread_ptid (ptid
);
1905 info
->priv
= XNEW (struct private_thread_info
);
1906 info
->private_dtor
= free_private_thread_info
;
1907 info
->priv
->core
= -1;
1908 info
->priv
->extra
= 0;
1914 /* Call this function as a result of
1915 1) A halt indication (T packet) containing a thread id
1916 2) A direct query of currthread
1917 3) Successful execution of set thread */
1920 record_currthread (struct remote_state
*rs
, ptid_t currthread
)
1922 rs
->general_thread
= currthread
;
1925 /* If 'QPassSignals' is supported, tell the remote stub what signals
1926 it can simply pass through to the inferior without reporting. */
1929 remote_pass_signals (struct target_ops
*self
,
1930 int numsigs
, unsigned char *pass_signals
)
1932 if (packet_support (PACKET_QPassSignals
) != PACKET_DISABLE
)
1934 char *pass_packet
, *p
;
1936 struct remote_state
*rs
= get_remote_state ();
1938 gdb_assert (numsigs
< 256);
1939 for (i
= 0; i
< numsigs
; i
++)
1941 if (pass_signals
[i
])
1944 pass_packet
= (char *) xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
1945 strcpy (pass_packet
, "QPassSignals:");
1946 p
= pass_packet
+ strlen (pass_packet
);
1947 for (i
= 0; i
< numsigs
; i
++)
1949 if (pass_signals
[i
])
1952 *p
++ = tohex (i
>> 4);
1953 *p
++ = tohex (i
& 15);
1962 if (!rs
->last_pass_packet
|| strcmp (rs
->last_pass_packet
, pass_packet
))
1964 putpkt (pass_packet
);
1965 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1966 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
1967 if (rs
->last_pass_packet
)
1968 xfree (rs
->last_pass_packet
);
1969 rs
->last_pass_packet
= pass_packet
;
1972 xfree (pass_packet
);
1976 /* If 'QProgramSignals' is supported, tell the remote stub what
1977 signals it should pass through to the inferior when detaching. */
1980 remote_program_signals (struct target_ops
*self
,
1981 int numsigs
, unsigned char *signals
)
1983 if (packet_support (PACKET_QProgramSignals
) != PACKET_DISABLE
)
1987 struct remote_state
*rs
= get_remote_state ();
1989 gdb_assert (numsigs
< 256);
1990 for (i
= 0; i
< numsigs
; i
++)
1995 packet
= (char *) xmalloc (count
* 3 + strlen ("QProgramSignals:") + 1);
1996 strcpy (packet
, "QProgramSignals:");
1997 p
= packet
+ strlen (packet
);
1998 for (i
= 0; i
< numsigs
; i
++)
2000 if (signal_pass_state (i
))
2003 *p
++ = tohex (i
>> 4);
2004 *p
++ = tohex (i
& 15);
2013 if (!rs
->last_program_signals_packet
2014 || strcmp (rs
->last_program_signals_packet
, packet
) != 0)
2017 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2018 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QProgramSignals
]);
2019 xfree (rs
->last_program_signals_packet
);
2020 rs
->last_program_signals_packet
= packet
;
2027 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2028 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2029 thread. If GEN is set, set the general thread, if not, then set
2030 the step/continue thread. */
2032 set_thread (struct ptid ptid
, int gen
)
2034 struct remote_state
*rs
= get_remote_state ();
2035 ptid_t state
= gen
? rs
->general_thread
: rs
->continue_thread
;
2036 char *buf
= rs
->buf
;
2037 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
2039 if (ptid_equal (state
, ptid
))
2043 *buf
++ = gen
? 'g' : 'c';
2044 if (ptid_equal (ptid
, magic_null_ptid
))
2045 xsnprintf (buf
, endbuf
- buf
, "0");
2046 else if (ptid_equal (ptid
, any_thread_ptid
))
2047 xsnprintf (buf
, endbuf
- buf
, "0");
2048 else if (ptid_equal (ptid
, minus_one_ptid
))
2049 xsnprintf (buf
, endbuf
- buf
, "-1");
2051 write_ptid (buf
, endbuf
, ptid
);
2053 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2055 rs
->general_thread
= ptid
;
2057 rs
->continue_thread
= ptid
;
2061 set_general_thread (struct ptid ptid
)
2063 set_thread (ptid
, 1);
2067 set_continue_thread (struct ptid ptid
)
2069 set_thread (ptid
, 0);
2072 /* Change the remote current process. Which thread within the process
2073 ends up selected isn't important, as long as it is the same process
2074 as what INFERIOR_PTID points to.
2076 This comes from that fact that there is no explicit notion of
2077 "selected process" in the protocol. The selected process for
2078 general operations is the process the selected general thread
2082 set_general_process (void)
2084 struct remote_state
*rs
= get_remote_state ();
2086 /* If the remote can't handle multiple processes, don't bother. */
2087 if (!rs
->extended
|| !remote_multi_process_p (rs
))
2090 /* We only need to change the remote current thread if it's pointing
2091 at some other process. */
2092 if (ptid_get_pid (rs
->general_thread
) != ptid_get_pid (inferior_ptid
))
2093 set_general_thread (inferior_ptid
);
2097 /* Return nonzero if this is the main thread that we made up ourselves
2098 to model non-threaded targets as single-threaded. */
2101 remote_thread_always_alive (struct target_ops
*ops
, ptid_t ptid
)
2103 struct remote_state
*rs
= get_remote_state ();
2106 if (ptid_equal (ptid
, magic_null_ptid
))
2107 /* The main thread is always alive. */
2110 if (ptid_get_pid (ptid
) != 0 && ptid_get_lwp (ptid
) == 0)
2111 /* The main thread is always alive. This can happen after a
2112 vAttach, if the remote side doesn't support
2119 /* Return nonzero if the thread PTID is still alive on the remote
2123 remote_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
2125 struct remote_state
*rs
= get_remote_state ();
2128 /* Check if this is a thread that we made up ourselves to model
2129 non-threaded targets as single-threaded. */
2130 if (remote_thread_always_alive (ops
, ptid
))
2134 endp
= rs
->buf
+ get_remote_packet_size ();
2137 write_ptid (p
, endp
, ptid
);
2140 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2141 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
2144 /* About these extended threadlist and threadinfo packets. They are
2145 variable length packets but, the fields within them are often fixed
2146 length. They are redundent enough to send over UDP as is the
2147 remote protocol in general. There is a matching unit test module
2150 /* WARNING: This threadref data structure comes from the remote O.S.,
2151 libstub protocol encoding, and remote.c. It is not particularly
2154 /* Right now, the internal structure is int. We want it to be bigger.
2155 Plan to fix this. */
2157 typedef int gdb_threadref
; /* Internal GDB thread reference. */
2159 /* gdb_ext_thread_info is an internal GDB data structure which is
2160 equivalent to the reply of the remote threadinfo packet. */
2162 struct gdb_ext_thread_info
2164 threadref threadid
; /* External form of thread reference. */
2165 int active
; /* Has state interesting to GDB?
2167 char display
[256]; /* Brief state display, name,
2168 blocked/suspended. */
2169 char shortname
[32]; /* To be used to name threads. */
2170 char more_display
[256]; /* Long info, statistics, queue depth,
2174 /* The volume of remote transfers can be limited by submitting
2175 a mask containing bits specifying the desired information.
2176 Use a union of these values as the 'selection' parameter to
2177 get_thread_info. FIXME: Make these TAG names more thread specific. */
2179 #define TAG_THREADID 1
2180 #define TAG_EXISTS 2
2181 #define TAG_DISPLAY 4
2182 #define TAG_THREADNAME 8
2183 #define TAG_MOREDISPLAY 16
2185 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2187 static char *unpack_nibble (char *buf
, int *val
);
2189 static char *unpack_byte (char *buf
, int *value
);
2191 static char *pack_int (char *buf
, int value
);
2193 static char *unpack_int (char *buf
, int *value
);
2195 static char *unpack_string (char *src
, char *dest
, int length
);
2197 static char *pack_threadid (char *pkt
, threadref
*id
);
2199 static char *unpack_threadid (char *inbuf
, threadref
*id
);
2201 void int_to_threadref (threadref
*id
, int value
);
2203 static int threadref_to_int (threadref
*ref
);
2205 static void copy_threadref (threadref
*dest
, threadref
*src
);
2207 static int threadmatch (threadref
*dest
, threadref
*src
);
2209 static char *pack_threadinfo_request (char *pkt
, int mode
,
2212 static int remote_unpack_thread_info_response (char *pkt
,
2213 threadref
*expectedref
,
2214 struct gdb_ext_thread_info
2218 static int remote_get_threadinfo (threadref
*threadid
,
2219 int fieldset
, /*TAG mask */
2220 struct gdb_ext_thread_info
*info
);
2222 static char *pack_threadlist_request (char *pkt
, int startflag
,
2224 threadref
*nextthread
);
2226 static int parse_threadlist_response (char *pkt
,
2228 threadref
*original_echo
,
2229 threadref
*resultlist
,
2232 static int remote_get_threadlist (int startflag
,
2233 threadref
*nextthread
,
2237 threadref
*threadlist
);
2239 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
2241 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
2242 void *context
, int looplimit
);
2244 static int remote_newthread_step (threadref
*ref
, void *context
);
2247 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2248 buffer we're allowed to write to. Returns
2249 BUF+CHARACTERS_WRITTEN. */
2252 write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
2255 struct remote_state
*rs
= get_remote_state ();
2257 if (remote_multi_process_p (rs
))
2259 pid
= ptid_get_pid (ptid
);
2261 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
2263 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
2265 tid
= ptid_get_lwp (ptid
);
2267 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
2269 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
2274 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
2275 passed the last parsed char. Returns null_ptid on error. */
2278 read_ptid (char *buf
, char **obuf
)
2282 ULONGEST pid
= 0, tid
= 0;
2286 /* Multi-process ptid. */
2287 pp
= unpack_varlen_hex (p
+ 1, &pid
);
2289 error (_("invalid remote ptid: %s"), p
);
2292 pp
= unpack_varlen_hex (p
+ 1, &tid
);
2295 return ptid_build (pid
, tid
, 0);
2298 /* No multi-process. Just a tid. */
2299 pp
= unpack_varlen_hex (p
, &tid
);
2301 /* Return null_ptid when no thread id is found. */
2309 /* Since the stub is not sending a process id, then default to
2310 what's in inferior_ptid, unless it's null at this point. If so,
2311 then since there's no way to know the pid of the reported
2312 threads, use the magic number. */
2313 if (ptid_equal (inferior_ptid
, null_ptid
))
2314 pid
= ptid_get_pid (magic_null_ptid
);
2316 pid
= ptid_get_pid (inferior_ptid
);
2320 return ptid_build (pid
, tid
, 0);
2326 if (ch
>= 'a' && ch
<= 'f')
2327 return ch
- 'a' + 10;
2328 if (ch
>= '0' && ch
<= '9')
2330 if (ch
>= 'A' && ch
<= 'F')
2331 return ch
- 'A' + 10;
2336 stub_unpack_int (char *buff
, int fieldlength
)
2343 nibble
= stubhex (*buff
++);
2347 retval
= retval
<< 4;
2353 unpack_nibble (char *buf
, int *val
)
2355 *val
= fromhex (*buf
++);
2360 unpack_byte (char *buf
, int *value
)
2362 *value
= stub_unpack_int (buf
, 2);
2367 pack_int (char *buf
, int value
)
2369 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
2370 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
2371 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
2372 buf
= pack_hex_byte (buf
, (value
& 0xff));
2377 unpack_int (char *buf
, int *value
)
2379 *value
= stub_unpack_int (buf
, 8);
2383 #if 0 /* Currently unused, uncomment when needed. */
2384 static char *pack_string (char *pkt
, char *string
);
2387 pack_string (char *pkt
, char *string
)
2392 len
= strlen (string
);
2394 len
= 200; /* Bigger than most GDB packets, junk??? */
2395 pkt
= pack_hex_byte (pkt
, len
);
2399 if ((ch
== '\0') || (ch
== '#'))
2400 ch
= '*'; /* Protect encapsulation. */
2405 #endif /* 0 (unused) */
2408 unpack_string (char *src
, char *dest
, int length
)
2417 pack_threadid (char *pkt
, threadref
*id
)
2420 unsigned char *altid
;
2422 altid
= (unsigned char *) id
;
2423 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
2425 pkt
= pack_hex_byte (pkt
, *altid
++);
2431 unpack_threadid (char *inbuf
, threadref
*id
)
2434 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
2437 altref
= (char *) id
;
2439 while (inbuf
< limit
)
2441 x
= stubhex (*inbuf
++);
2442 y
= stubhex (*inbuf
++);
2443 *altref
++ = (x
<< 4) | y
;
2448 /* Externally, threadrefs are 64 bits but internally, they are still
2449 ints. This is due to a mismatch of specifications. We would like
2450 to use 64bit thread references internally. This is an adapter
2454 int_to_threadref (threadref
*id
, int value
)
2456 unsigned char *scan
;
2458 scan
= (unsigned char *) id
;
2464 *scan
++ = (value
>> 24) & 0xff;
2465 *scan
++ = (value
>> 16) & 0xff;
2466 *scan
++ = (value
>> 8) & 0xff;
2467 *scan
++ = (value
& 0xff);
2471 threadref_to_int (threadref
*ref
)
2474 unsigned char *scan
;
2480 value
= (value
<< 8) | ((*scan
++) & 0xff);
2485 copy_threadref (threadref
*dest
, threadref
*src
)
2488 unsigned char *csrc
, *cdest
;
2490 csrc
= (unsigned char *) src
;
2491 cdest
= (unsigned char *) dest
;
2498 threadmatch (threadref
*dest
, threadref
*src
)
2500 /* Things are broken right now, so just assume we got a match. */
2502 unsigned char *srcp
, *destp
;
2504 srcp
= (char *) src
;
2505 destp
= (char *) dest
;
2509 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
2516 threadid:1, # always request threadid
2523 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2526 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
2528 *pkt
++ = 'q'; /* Info Query */
2529 *pkt
++ = 'P'; /* process or thread info */
2530 pkt
= pack_int (pkt
, mode
); /* mode */
2531 pkt
= pack_threadid (pkt
, id
); /* threadid */
2532 *pkt
= '\0'; /* terminate */
2536 /* These values tag the fields in a thread info response packet. */
2537 /* Tagging the fields allows us to request specific fields and to
2538 add more fields as time goes by. */
2540 #define TAG_THREADID 1 /* Echo the thread identifier. */
2541 #define TAG_EXISTS 2 /* Is this process defined enough to
2542 fetch registers and its stack? */
2543 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2544 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2545 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2549 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
2550 struct gdb_ext_thread_info
*info
)
2552 struct remote_state
*rs
= get_remote_state ();
2556 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
2559 /* info->threadid = 0; FIXME: implement zero_threadref. */
2561 info
->display
[0] = '\0';
2562 info
->shortname
[0] = '\0';
2563 info
->more_display
[0] = '\0';
2565 /* Assume the characters indicating the packet type have been
2567 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
2568 pkt
= unpack_threadid (pkt
, &ref
);
2571 warning (_("Incomplete response to threadinfo request."));
2572 if (!threadmatch (&ref
, expectedref
))
2573 { /* This is an answer to a different request. */
2574 warning (_("ERROR RMT Thread info mismatch."));
2577 copy_threadref (&info
->threadid
, &ref
);
2579 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2581 /* Packets are terminated with nulls. */
2582 while ((pkt
< limit
) && mask
&& *pkt
)
2584 pkt
= unpack_int (pkt
, &tag
); /* tag */
2585 pkt
= unpack_byte (pkt
, &length
); /* length */
2586 if (!(tag
& mask
)) /* Tags out of synch with mask. */
2588 warning (_("ERROR RMT: threadinfo tag mismatch."));
2592 if (tag
== TAG_THREADID
)
2596 warning (_("ERROR RMT: length of threadid is not 16."));
2600 pkt
= unpack_threadid (pkt
, &ref
);
2601 mask
= mask
& ~TAG_THREADID
;
2604 if (tag
== TAG_EXISTS
)
2606 info
->active
= stub_unpack_int (pkt
, length
);
2608 mask
= mask
& ~(TAG_EXISTS
);
2611 warning (_("ERROR RMT: 'exists' length too long."));
2617 if (tag
== TAG_THREADNAME
)
2619 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
2620 mask
= mask
& ~TAG_THREADNAME
;
2623 if (tag
== TAG_DISPLAY
)
2625 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
2626 mask
= mask
& ~TAG_DISPLAY
;
2629 if (tag
== TAG_MOREDISPLAY
)
2631 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
2632 mask
= mask
& ~TAG_MOREDISPLAY
;
2635 warning (_("ERROR RMT: unknown thread info tag."));
2636 break; /* Not a tag we know about. */
2642 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
2643 struct gdb_ext_thread_info
*info
)
2645 struct remote_state
*rs
= get_remote_state ();
2648 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
2650 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2652 if (rs
->buf
[0] == '\0')
2655 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
2660 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2663 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
2664 threadref
*nextthread
)
2666 *pkt
++ = 'q'; /* info query packet */
2667 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
2668 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
2669 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
2670 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
2675 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2678 parse_threadlist_response (char *pkt
, int result_limit
,
2679 threadref
*original_echo
, threadref
*resultlist
,
2682 struct remote_state
*rs
= get_remote_state ();
2684 int count
, resultcount
, done
;
2687 /* Assume the 'q' and 'M chars have been stripped. */
2688 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
2689 /* done parse past here */
2690 pkt
= unpack_byte (pkt
, &count
); /* count field */
2691 pkt
= unpack_nibble (pkt
, &done
);
2692 /* The first threadid is the argument threadid. */
2693 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
2694 while ((count
-- > 0) && (pkt
< limit
))
2696 pkt
= unpack_threadid (pkt
, resultlist
++);
2697 if (resultcount
++ >= result_limit
)
2705 /* Fetch the next batch of threads from the remote. Returns -1 if the
2706 qL packet is not supported, 0 on error and 1 on success. */
2709 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
2710 int *done
, int *result_count
, threadref
*threadlist
)
2712 struct remote_state
*rs
= get_remote_state ();
2715 /* Trancate result limit to be smaller than the packet size. */
2716 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
2717 >= get_remote_packet_size ())
2718 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
2720 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
2722 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2723 if (*rs
->buf
== '\0')
2725 /* Packet not supported. */
2730 parse_threadlist_response (rs
->buf
+ 2, result_limit
,
2731 &rs
->echo_nextthread
, threadlist
, done
);
2733 if (!threadmatch (&rs
->echo_nextthread
, nextthread
))
2735 /* FIXME: This is a good reason to drop the packet. */
2736 /* Possably, there is a duplicate response. */
2738 retransmit immediatly - race conditions
2739 retransmit after timeout - yes
2741 wait for packet, then exit
2743 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2744 return 0; /* I choose simply exiting. */
2746 if (*result_count
<= 0)
2750 warning (_("RMT ERROR : failed to get remote thread list."));
2753 return result
; /* break; */
2755 if (*result_count
> result_limit
)
2758 warning (_("RMT ERROR: threadlist response longer than requested."));
2764 /* Fetch the list of remote threads, with the qL packet, and call
2765 STEPFUNCTION for each thread found. Stops iterating and returns 1
2766 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
2767 STEPFUNCTION returns false. If the packet is not supported,
2771 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
2774 struct remote_state
*rs
= get_remote_state ();
2775 int done
, i
, result_count
;
2783 if (loopcount
++ > looplimit
)
2786 warning (_("Remote fetch threadlist -infinite loop-."));
2789 result
= remote_get_threadlist (startflag
, &rs
->nextthread
,
2790 MAXTHREADLISTRESULTS
,
2791 &done
, &result_count
,
2792 rs
->resultthreadlist
);
2795 /* Clear for later iterations. */
2797 /* Setup to resume next batch of thread references, set nextthread. */
2798 if (result_count
>= 1)
2799 copy_threadref (&rs
->nextthread
,
2800 &rs
->resultthreadlist
[result_count
- 1]);
2802 while (result_count
--)
2804 if (!(*stepfunction
) (&rs
->resultthreadlist
[i
++], context
))
2814 /* A thread found on the remote target. */
2816 typedef struct thread_item
2818 /* The thread's PTID. */
2821 /* The thread's extra info. May be NULL. */
2824 /* The core the thread was running on. -1 if not known. */
2827 DEF_VEC_O(thread_item_t
);
2829 /* Context passed around to the various methods listing remote
2830 threads. As new threads are found, they're added to the ITEMS
2833 struct threads_listing_context
2835 /* The threads found on the remote target. */
2836 VEC (thread_item_t
) *items
;
2839 /* Discard the contents of the constructed thread listing context. */
2842 clear_threads_listing_context (void *p
)
2844 struct threads_listing_context
*context
2845 = (struct threads_listing_context
*) p
;
2847 struct thread_item
*item
;
2849 for (i
= 0; VEC_iterate (thread_item_t
, context
->items
, i
, item
); ++i
)
2850 xfree (item
->extra
);
2852 VEC_free (thread_item_t
, context
->items
);
2855 /* Remove the thread specified as the related_pid field of WS
2856 from the CONTEXT list. */
2859 threads_listing_context_remove (struct target_waitstatus
*ws
,
2860 struct threads_listing_context
*context
)
2862 struct thread_item
*item
;
2864 ptid_t child_ptid
= ws
->value
.related_pid
;
2866 for (i
= 0; VEC_iterate (thread_item_t
, context
->items
, i
, item
); ++i
)
2868 if (ptid_equal (item
->ptid
, child_ptid
))
2870 VEC_ordered_remove (thread_item_t
, context
->items
, i
);
2877 remote_newthread_step (threadref
*ref
, void *data
)
2879 struct threads_listing_context
*context
2880 = (struct threads_listing_context
*) data
;
2881 struct thread_item item
;
2882 int pid
= ptid_get_pid (inferior_ptid
);
2884 item
.ptid
= ptid_build (pid
, threadref_to_int (ref
), 0);
2888 VEC_safe_push (thread_item_t
, context
->items
, &item
);
2890 return 1; /* continue iterator */
2893 #define CRAZY_MAX_THREADS 1000
2896 remote_current_thread (ptid_t oldpid
)
2898 struct remote_state
*rs
= get_remote_state ();
2901 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2902 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
2907 result
= read_ptid (&rs
->buf
[2], &obuf
);
2908 if (*obuf
!= '\0' && remote_debug
)
2909 fprintf_unfiltered (gdb_stdlog
,
2910 "warning: garbage in qC reply\n");
2918 /* List remote threads using the deprecated qL packet. */
2921 remote_get_threads_with_ql (struct target_ops
*ops
,
2922 struct threads_listing_context
*context
)
2924 if (remote_threadlist_iterator (remote_newthread_step
, context
,
2925 CRAZY_MAX_THREADS
) >= 0)
2931 #if defined(HAVE_LIBEXPAT)
2934 start_thread (struct gdb_xml_parser
*parser
,
2935 const struct gdb_xml_element
*element
,
2936 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
2938 struct threads_listing_context
*data
2939 = (struct threads_listing_context
*) user_data
;
2941 struct thread_item item
;
2943 struct gdb_xml_value
*attr
;
2945 id
= (char *) xml_find_attribute (attributes
, "id")->value
;
2946 item
.ptid
= read_ptid (id
, NULL
);
2948 attr
= xml_find_attribute (attributes
, "core");
2950 item
.core
= *(ULONGEST
*) attr
->value
;
2956 VEC_safe_push (thread_item_t
, data
->items
, &item
);
2960 end_thread (struct gdb_xml_parser
*parser
,
2961 const struct gdb_xml_element
*element
,
2962 void *user_data
, const char *body_text
)
2964 struct threads_listing_context
*data
2965 = (struct threads_listing_context
*) user_data
;
2967 if (body_text
&& *body_text
)
2968 VEC_last (thread_item_t
, data
->items
)->extra
= xstrdup (body_text
);
2971 const struct gdb_xml_attribute thread_attributes
[] = {
2972 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
2973 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
2974 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
2977 const struct gdb_xml_element thread_children
[] = {
2978 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
2981 const struct gdb_xml_element threads_children
[] = {
2982 { "thread", thread_attributes
, thread_children
,
2983 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
2984 start_thread
, end_thread
},
2985 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
2988 const struct gdb_xml_element threads_elements
[] = {
2989 { "threads", NULL
, threads_children
,
2990 GDB_XML_EF_NONE
, NULL
, NULL
},
2991 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
2996 /* List remote threads using qXfer:threads:read. */
2999 remote_get_threads_with_qxfer (struct target_ops
*ops
,
3000 struct threads_listing_context
*context
)
3002 #if defined(HAVE_LIBEXPAT)
3003 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3005 char *xml
= target_read_stralloc (ops
, TARGET_OBJECT_THREADS
, NULL
);
3006 struct cleanup
*back_to
= make_cleanup (xfree
, xml
);
3008 if (xml
!= NULL
&& *xml
!= '\0')
3010 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3011 threads_elements
, xml
, context
);
3014 do_cleanups (back_to
);
3022 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3025 remote_get_threads_with_qthreadinfo (struct target_ops
*ops
,
3026 struct threads_listing_context
*context
)
3028 struct remote_state
*rs
= get_remote_state ();
3030 if (rs
->use_threadinfo_query
)
3034 putpkt ("qfThreadInfo");
3035 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3037 if (bufp
[0] != '\0') /* q packet recognized */
3039 while (*bufp
++ == 'm') /* reply contains one or more TID */
3043 struct thread_item item
;
3045 item
.ptid
= read_ptid (bufp
, &bufp
);
3049 VEC_safe_push (thread_item_t
, context
->items
, &item
);
3051 while (*bufp
++ == ','); /* comma-separated list */
3052 putpkt ("qsThreadInfo");
3053 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3060 /* Packet not recognized. */
3061 rs
->use_threadinfo_query
= 0;
3068 /* Implement the to_update_thread_list function for the remote
3072 remote_update_thread_list (struct target_ops
*ops
)
3074 struct remote_state
*rs
= get_remote_state ();
3075 struct threads_listing_context context
;
3076 struct cleanup
*old_chain
;
3079 context
.items
= NULL
;
3080 old_chain
= make_cleanup (clear_threads_listing_context
, &context
);
3082 /* We have a few different mechanisms to fetch the thread list. Try
3083 them all, starting with the most preferred one first, falling
3084 back to older methods. */
3085 if (remote_get_threads_with_qxfer (ops
, &context
)
3086 || remote_get_threads_with_qthreadinfo (ops
, &context
)
3087 || remote_get_threads_with_ql (ops
, &context
))
3090 struct thread_item
*item
;
3091 struct thread_info
*tp
, *tmp
;
3095 if (VEC_empty (thread_item_t
, context
.items
)
3096 && remote_thread_always_alive (ops
, inferior_ptid
))
3098 /* Some targets don't really support threads, but still
3099 reply an (empty) thread list in response to the thread
3100 listing packets, instead of replying "packet not
3101 supported". Exit early so we don't delete the main
3103 do_cleanups (old_chain
);
3107 /* CONTEXT now holds the current thread list on the remote
3108 target end. Delete GDB-side threads no longer found on the
3110 ALL_THREADS_SAFE (tp
, tmp
)
3113 VEC_iterate (thread_item_t
, context
.items
, i
, item
);
3116 if (ptid_equal (item
->ptid
, tp
->ptid
))
3120 if (i
== VEC_length (thread_item_t
, context
.items
))
3123 delete_thread (tp
->ptid
);
3127 /* Remove any unreported fork child threads from CONTEXT so
3128 that we don't interfere with follow fork, which is where
3129 creation of such threads is handled. */
3130 remove_new_fork_children (&context
);
3132 /* And now add threads we don't know about yet to our list. */
3134 VEC_iterate (thread_item_t
, context
.items
, i
, item
);
3137 if (!ptid_equal (item
->ptid
, null_ptid
))
3139 struct private_thread_info
*info
;
3140 /* In non-stop mode, we assume new found threads are
3141 running until proven otherwise with a stop reply. In
3142 all-stop, we can only get here if all threads are
3144 int running
= non_stop
? 1 : 0;
3146 remote_notice_new_inferior (item
->ptid
, running
);
3148 info
= demand_private_info (item
->ptid
);
3149 info
->core
= item
->core
;
3150 info
->extra
= item
->extra
;
3158 /* If no thread listing method is supported, then query whether
3159 each known thread is alive, one by one, with the T packet.
3160 If the target doesn't support threads at all, then this is a
3161 no-op. See remote_thread_alive. */
3165 do_cleanups (old_chain
);
3169 * Collect a descriptive string about the given thread.
3170 * The target may say anything it wants to about the thread
3171 * (typically info about its blocked / runnable state, name, etc.).
3172 * This string will appear in the info threads display.
3174 * Optional: targets are not required to implement this function.
3178 remote_threads_extra_info (struct target_ops
*self
, struct thread_info
*tp
)
3180 struct remote_state
*rs
= get_remote_state ();
3184 struct gdb_ext_thread_info threadinfo
;
3185 static char display_buf
[100]; /* arbitrary... */
3186 int n
= 0; /* position in display_buf */
3188 if (rs
->remote_desc
== 0) /* paranoia */
3189 internal_error (__FILE__
, __LINE__
,
3190 _("remote_threads_extra_info"));
3192 if (ptid_equal (tp
->ptid
, magic_null_ptid
)
3193 || (ptid_get_pid (tp
->ptid
) != 0 && ptid_get_lwp (tp
->ptid
) == 0))
3194 /* This is the main thread which was added by GDB. The remote
3195 server doesn't know about it. */
3198 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3200 struct thread_info
*info
= find_thread_ptid (tp
->ptid
);
3202 if (info
&& info
->priv
)
3203 return info
->priv
->extra
;
3208 if (rs
->use_threadextra_query
)
3211 char *endb
= rs
->buf
+ get_remote_packet_size ();
3213 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
3215 write_ptid (b
, endb
, tp
->ptid
);
3218 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3219 if (rs
->buf
[0] != 0)
3221 n
= min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
3222 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
3223 display_buf
[result
] = '\0';
3228 /* If the above query fails, fall back to the old method. */
3229 rs
->use_threadextra_query
= 0;
3230 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
3231 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
3232 int_to_threadref (&id
, ptid_get_lwp (tp
->ptid
));
3233 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
3234 if (threadinfo
.active
)
3236 if (*threadinfo
.shortname
)
3237 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
3238 " Name: %s,", threadinfo
.shortname
);
3239 if (*threadinfo
.display
)
3240 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3241 " State: %s,", threadinfo
.display
);
3242 if (*threadinfo
.more_display
)
3243 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3244 " Priority: %s", threadinfo
.more_display
);
3248 /* For purely cosmetic reasons, clear up trailing commas. */
3249 if (',' == display_buf
[n
-1])
3250 display_buf
[n
-1] = ' ';
3259 remote_static_tracepoint_marker_at (struct target_ops
*self
, CORE_ADDR addr
,
3260 struct static_tracepoint_marker
*marker
)
3262 struct remote_state
*rs
= get_remote_state ();
3265 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
3267 p
+= hexnumstr (p
, addr
);
3269 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3273 error (_("Remote failure reply: %s"), p
);
3277 parse_static_tracepoint_marker_definition (p
, &p
, marker
);
3284 static VEC(static_tracepoint_marker_p
) *
3285 remote_static_tracepoint_markers_by_strid (struct target_ops
*self
,
3288 struct remote_state
*rs
= get_remote_state ();
3289 VEC(static_tracepoint_marker_p
) *markers
= NULL
;
3290 struct static_tracepoint_marker
*marker
= NULL
;
3291 struct cleanup
*old_chain
;
3294 /* Ask for a first packet of static tracepoint marker
3297 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3300 error (_("Remote failure reply: %s"), p
);
3302 old_chain
= make_cleanup (free_current_marker
, &marker
);
3307 marker
= XCNEW (struct static_tracepoint_marker
);
3311 parse_static_tracepoint_marker_definition (p
, &p
, marker
);
3313 if (strid
== NULL
|| strcmp (strid
, marker
->str_id
) == 0)
3315 VEC_safe_push (static_tracepoint_marker_p
,
3321 release_static_tracepoint_marker (marker
);
3322 memset (marker
, 0, sizeof (*marker
));
3325 while (*p
++ == ','); /* comma-separated list */
3326 /* Ask for another packet of static tracepoint definition. */
3328 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3332 do_cleanups (old_chain
);
3337 /* Implement the to_get_ada_task_ptid function for the remote targets. */
3340 remote_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long thread
)
3342 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, 0);
3346 /* Restart the remote side; this is an extended protocol operation. */
3349 extended_remote_restart (void)
3351 struct remote_state
*rs
= get_remote_state ();
3353 /* Send the restart command; for reasons I don't understand the
3354 remote side really expects a number after the "R". */
3355 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
3358 remote_fileio_reset ();
3361 /* Clean up connection to a remote debugger. */
3364 remote_close (struct target_ops
*self
)
3366 struct remote_state
*rs
= get_remote_state ();
3368 if (rs
->remote_desc
== NULL
)
3369 return; /* already closed */
3371 /* Make sure we leave stdin registered in the event loop, and we
3372 don't leave the async SIGINT signal handler installed. */
3373 remote_terminal_ours (self
);
3375 serial_close (rs
->remote_desc
);
3376 rs
->remote_desc
= NULL
;
3378 /* We don't have a connection to the remote stub anymore. Get rid
3379 of all the inferiors and their threads we were controlling.
3380 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
3381 will be unable to find the thread corresponding to (pid, 0, 0). */
3382 inferior_ptid
= null_ptid
;
3383 discard_all_inferiors ();
3385 /* We are closing the remote target, so we should discard
3386 everything of this target. */
3387 discard_pending_stop_replies_in_queue (rs
);
3389 if (remote_async_inferior_event_token
)
3390 delete_async_event_handler (&remote_async_inferior_event_token
);
3392 remote_notif_state_xfree (rs
->notif_state
);
3394 trace_reset_local_state ();
3397 /* Query the remote side for the text, data and bss offsets. */
3402 struct remote_state
*rs
= get_remote_state ();
3405 int lose
, num_segments
= 0, do_sections
, do_segments
;
3406 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
3407 struct section_offsets
*offs
;
3408 struct symfile_segment_data
*data
;
3410 if (symfile_objfile
== NULL
)
3413 putpkt ("qOffsets");
3414 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3417 if (buf
[0] == '\000')
3418 return; /* Return silently. Stub doesn't support
3422 warning (_("Remote failure reply: %s"), buf
);
3426 /* Pick up each field in turn. This used to be done with scanf, but
3427 scanf will make trouble if CORE_ADDR size doesn't match
3428 conversion directives correctly. The following code will work
3429 with any size of CORE_ADDR. */
3430 text_addr
= data_addr
= bss_addr
= 0;
3434 if (startswith (ptr
, "Text="))
3437 /* Don't use strtol, could lose on big values. */
3438 while (*ptr
&& *ptr
!= ';')
3439 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3441 if (startswith (ptr
, ";Data="))
3444 while (*ptr
&& *ptr
!= ';')
3445 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3450 if (!lose
&& startswith (ptr
, ";Bss="))
3453 while (*ptr
&& *ptr
!= ';')
3454 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
3456 if (bss_addr
!= data_addr
)
3457 warning (_("Target reported unsupported offsets: %s"), buf
);
3462 else if (startswith (ptr
, "TextSeg="))
3465 /* Don't use strtol, could lose on big values. */
3466 while (*ptr
&& *ptr
!= ';')
3467 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3470 if (startswith (ptr
, ";DataSeg="))
3473 while (*ptr
&& *ptr
!= ';')
3474 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3482 error (_("Malformed response to offset query, %s"), buf
);
3483 else if (*ptr
!= '\0')
3484 warning (_("Target reported unsupported offsets: %s"), buf
);
3486 offs
= ((struct section_offsets
*)
3487 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
3488 memcpy (offs
, symfile_objfile
->section_offsets
,
3489 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
3491 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
3492 do_segments
= (data
!= NULL
);
3493 do_sections
= num_segments
== 0;
3495 if (num_segments
> 0)
3497 segments
[0] = text_addr
;
3498 segments
[1] = data_addr
;
3500 /* If we have two segments, we can still try to relocate everything
3501 by assuming that the .text and .data offsets apply to the whole
3502 text and data segments. Convert the offsets given in the packet
3503 to base addresses for symfile_map_offsets_to_segments. */
3504 else if (data
&& data
->num_segments
== 2)
3506 segments
[0] = data
->segment_bases
[0] + text_addr
;
3507 segments
[1] = data
->segment_bases
[1] + data_addr
;
3510 /* If the object file has only one segment, assume that it is text
3511 rather than data; main programs with no writable data are rare,
3512 but programs with no code are useless. Of course the code might
3513 have ended up in the data segment... to detect that we would need
3514 the permissions here. */
3515 else if (data
&& data
->num_segments
== 1)
3517 segments
[0] = data
->segment_bases
[0] + text_addr
;
3520 /* There's no way to relocate by segment. */
3526 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
3527 offs
, num_segments
, segments
);
3529 if (ret
== 0 && !do_sections
)
3530 error (_("Can not handle qOffsets TextSeg "
3531 "response with this symbol file"));
3538 free_symfile_segment_data (data
);
3542 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
3544 /* This is a temporary kludge to force data and bss to use the
3545 same offsets because that's what nlmconv does now. The real
3546 solution requires changes to the stub and remote.c that I
3547 don't have time to do right now. */
3549 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
3550 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
3553 objfile_relocate (symfile_objfile
, offs
);
3556 /* Send interrupt_sequence to remote target. */
3558 send_interrupt_sequence (void)
3560 struct remote_state
*rs
= get_remote_state ();
3562 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
3563 remote_serial_write ("\x03", 1);
3564 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
3565 serial_send_break (rs
->remote_desc
);
3566 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
3568 serial_send_break (rs
->remote_desc
);
3569 remote_serial_write ("g", 1);
3572 internal_error (__FILE__
, __LINE__
,
3573 _("Invalid value for interrupt_sequence_mode: %s."),
3574 interrupt_sequence_mode
);
3578 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
3579 and extract the PTID. Returns NULL_PTID if not found. */
3582 stop_reply_extract_thread (char *stop_reply
)
3584 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
3588 /* Txx r:val ; r:val (...) */
3591 /* Look for "register" named "thread". */
3596 p1
= strchr (p
, ':');
3600 if (strncmp (p
, "thread", p1
- p
) == 0)
3601 return read_ptid (++p1
, &p
);
3603 p1
= strchr (p
, ';');
3615 /* Determine the remote side's current thread. If we have a stop
3616 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
3617 "thread" register we can extract the current thread from. If not,
3618 ask the remote which is the current thread with qC. The former
3619 method avoids a roundtrip. */
3622 get_current_thread (char *wait_status
)
3624 ptid_t ptid
= null_ptid
;
3626 /* Note we don't use remote_parse_stop_reply as that makes use of
3627 the target architecture, which we haven't yet fully determined at
3629 if (wait_status
!= NULL
)
3630 ptid
= stop_reply_extract_thread (wait_status
);
3631 if (ptid_equal (ptid
, null_ptid
))
3632 ptid
= remote_current_thread (inferior_ptid
);
3637 /* Query the remote target for which is the current thread/process,
3638 add it to our tables, and update INFERIOR_PTID. The caller is
3639 responsible for setting the state such that the remote end is ready
3640 to return the current thread.
3642 This function is called after handling the '?' or 'vRun' packets,
3643 whose response is a stop reply from which we can also try
3644 extracting the thread. If the target doesn't support the explicit
3645 qC query, we infer the current thread from that stop reply, passed
3646 in in WAIT_STATUS, which may be NULL. */
3649 add_current_inferior_and_thread (char *wait_status
)
3651 struct remote_state
*rs
= get_remote_state ();
3655 inferior_ptid
= null_ptid
;
3657 /* Now, if we have thread information, update inferior_ptid. */
3658 ptid
= get_current_thread (wait_status
);
3660 if (!ptid_equal (ptid
, null_ptid
))
3662 if (!remote_multi_process_p (rs
))
3665 inferior_ptid
= ptid
;
3669 /* Without this, some commands which require an active target
3670 (such as kill) won't work. This variable serves (at least)
3671 double duty as both the pid of the target process (if it has
3672 such), and as a flag indicating that a target is active. */
3673 inferior_ptid
= magic_null_ptid
;
3677 remote_add_inferior (fake_pid_p
, ptid_get_pid (inferior_ptid
), -1, 1);
3679 /* Add the main thread. */
3680 add_thread_silent (inferior_ptid
);
3683 /* Process all initial stop replies the remote side sent in response
3684 to the ? packet. These indicate threads that were already stopped
3685 on initial connection. We mark these threads as stopped and print
3686 their current frame before giving the user the prompt. */
3689 process_initial_stop_replies (void)
3691 int pending_stop_replies
= stop_reply_queue_length ();
3693 /* Consume the initial pending events. */
3694 while (pending_stop_replies
-- > 0)
3696 ptid_t waiton_ptid
= minus_one_ptid
;
3698 struct target_waitstatus ws
;
3699 int ignore_event
= 0;
3701 memset (&ws
, 0, sizeof (ws
));
3702 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
3704 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
3708 case TARGET_WAITKIND_IGNORE
:
3709 case TARGET_WAITKIND_NO_RESUMED
:
3710 case TARGET_WAITKIND_SIGNALLED
:
3711 case TARGET_WAITKIND_EXITED
:
3712 /* We shouldn't see these, but if we do, just ignore. */
3714 fprintf_unfiltered (gdb_stdlog
, "remote: event ignored\n");
3718 case TARGET_WAITKIND_EXECD
:
3719 xfree (ws
.value
.execd_pathname
);
3728 switch_to_thread (event_ptid
);
3729 set_executing (event_ptid
, 0);
3730 set_running (event_ptid
, 0);
3732 stop_pc
= get_frame_pc (get_current_frame ());
3733 set_current_sal_from_frame (get_current_frame ());
3735 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
3737 enum gdb_signal sig
= ws
.value
.sig
;
3739 /* Stubs traditionally report SIGTRAP as initial signal,
3740 instead of signal 0. Suppress it. */
3741 if (sig
== GDB_SIGNAL_TRAP
)
3743 inferior_thread ()->suspend
.stop_signal
= sig
;
3745 if (signal_print_state (sig
))
3746 observer_notify_signal_received (sig
);
3749 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
, 1);
3750 observer_notify_normal_stop (NULL
, 1);
3755 remote_start_remote (int from_tty
, struct target_ops
*target
, int extended_p
)
3757 struct remote_state
*rs
= get_remote_state ();
3758 struct packet_config
*noack_config
;
3759 char *wait_status
= NULL
;
3761 immediate_quit
++; /* Allow user to interrupt it. */
3764 if (interrupt_on_connect
)
3765 send_interrupt_sequence ();
3767 /* Ack any packet which the remote side has already sent. */
3768 serial_write (rs
->remote_desc
, "+", 1);
3770 /* Signal other parts that we're going through the initial setup,
3771 and so things may not be stable yet. */
3772 rs
->starting_up
= 1;
3774 /* The first packet we send to the target is the optional "supported
3775 packets" request. If the target can answer this, it will tell us
3776 which later probes to skip. */
3777 remote_query_supported ();
3779 /* If the stub wants to get a QAllow, compose one and send it. */
3780 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
3781 remote_set_permissions (target
);
3783 /* Next, we possibly activate noack mode.
3785 If the QStartNoAckMode packet configuration is set to AUTO,
3786 enable noack mode if the stub reported a wish for it with
3789 If set to TRUE, then enable noack mode even if the stub didn't
3790 report it in qSupported. If the stub doesn't reply OK, the
3791 session ends with an error.
3793 If FALSE, then don't activate noack mode, regardless of what the
3794 stub claimed should be the default with qSupported. */
3796 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
3797 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
3799 putpkt ("QStartNoAckMode");
3800 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3801 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
3807 /* Tell the remote that we are using the extended protocol. */
3809 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3812 /* Let the target know which signals it is allowed to pass down to
3814 update_signals_program_target ();
3816 /* Next, if the target can specify a description, read it. We do
3817 this before anything involving memory or registers. */
3818 target_find_description ();
3820 /* Next, now that we know something about the target, update the
3821 address spaces in the program spaces. */
3822 update_address_spaces ();
3824 /* On OSs where the list of libraries is global to all
3825 processes, we fetch them early. */
3826 if (gdbarch_has_global_solist (target_gdbarch ()))
3827 solib_add (NULL
, from_tty
, target
, auto_solib_add
);
3831 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
3832 error (_("Non-stop mode requested, but remote "
3833 "does not support non-stop"));
3835 putpkt ("QNonStop:1");
3836 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3838 if (strcmp (rs
->buf
, "OK") != 0)
3839 error (_("Remote refused setting non-stop mode with: %s"), rs
->buf
);
3841 /* Find about threads and processes the stub is already
3842 controlling. We default to adding them in the running state.
3843 The '?' query below will then tell us about which threads are
3845 remote_update_thread_list (target
);
3847 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
3849 /* Don't assume that the stub can operate in all-stop mode.
3850 Request it explicitly. */
3851 putpkt ("QNonStop:0");
3852 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3854 if (strcmp (rs
->buf
, "OK") != 0)
3855 error (_("Remote refused setting all-stop mode with: %s"), rs
->buf
);
3858 /* Upload TSVs regardless of whether the target is running or not. The
3859 remote stub, such as GDBserver, may have some predefined or builtin
3860 TSVs, even if the target is not running. */
3861 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
3863 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
3865 remote_upload_trace_state_variables (target
, &uploaded_tsvs
);
3866 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
3869 /* Check whether the target is running now. */
3871 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3877 struct inferior
*inf
;
3879 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
3882 error (_("The target is not running (try extended-remote?)"));
3884 /* We're connected, but not running. Drop out before we
3885 call start_remote. */
3886 rs
->starting_up
= 0;
3891 /* Save the reply for later. */
3892 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
3893 strcpy (wait_status
, rs
->buf
);
3896 /* Fetch thread list. */
3897 target_update_thread_list ();
3899 /* Let the stub know that we want it to return the thread. */
3900 set_continue_thread (minus_one_ptid
);
3902 if (thread_count () == 0)
3904 /* Target has no concept of threads at all. GDB treats
3905 non-threaded target as single-threaded; add a main
3907 add_current_inferior_and_thread (wait_status
);
3911 /* We have thread information; select the thread the target
3912 says should be current. If we're reconnecting to a
3913 multi-threaded program, this will ideally be the thread
3914 that last reported an event before GDB disconnected. */
3915 inferior_ptid
= get_current_thread (wait_status
);
3916 if (ptid_equal (inferior_ptid
, null_ptid
))
3918 /* Odd... The target was able to list threads, but not
3919 tell us which thread was current (no "thread"
3920 register in T stop reply?). Just pick the first
3921 thread in the thread list then. */
3924 fprintf_unfiltered (gdb_stdlog
,
3925 "warning: couldn't determine remote "
3926 "current thread; picking first in list.\n");
3928 inferior_ptid
= thread_list
->ptid
;
3932 /* init_wait_for_inferior should be called before get_offsets in order
3933 to manage `inserted' flag in bp loc in a correct state.
3934 breakpoint_init_inferior, called from init_wait_for_inferior, set
3935 `inserted' flag to 0, while before breakpoint_re_set, called from
3936 start_remote, set `inserted' flag to 1. In the initialization of
3937 inferior, breakpoint_init_inferior should be called first, and then
3938 breakpoint_re_set can be called. If this order is broken, state of
3939 `inserted' flag is wrong, and cause some problems on breakpoint
3941 init_wait_for_inferior ();
3943 get_offsets (); /* Get text, data & bss offsets. */
3945 /* If we could not find a description using qXfer, and we know
3946 how to do it some other way, try again. This is not
3947 supported for non-stop; it could be, but it is tricky if
3948 there are no stopped threads when we connect. */
3949 if (remote_read_description_p (target
)
3950 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
3952 target_clear_description ();
3953 target_find_description ();
3956 /* Use the previously fetched status. */
3957 gdb_assert (wait_status
!= NULL
);
3958 strcpy (rs
->buf
, wait_status
);
3959 rs
->cached_wait_status
= 1;
3962 start_remote (from_tty
); /* Initialize gdb process mechanisms. */
3966 ptid_t current_ptid
;
3968 /* Clear WFI global state. Do this before finding about new
3969 threads and inferiors, and setting the current inferior.
3970 Otherwise we would clear the proceed status of the current
3971 inferior when we want its stop_soon state to be preserved
3972 (see notice_new_inferior). */
3973 init_wait_for_inferior ();
3975 /* In non-stop, we will either get an "OK", meaning that there
3976 are no stopped threads at this time; or, a regular stop
3977 reply. In the latter case, there may be more than one thread
3978 stopped --- we pull them all out using the vStopped
3980 if (strcmp (rs
->buf
, "OK") != 0)
3982 struct notif_client
*notif
= ¬if_client_stop
;
3984 /* remote_notif_get_pending_replies acks this one, and gets
3986 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
3987 = remote_notif_parse (notif
, rs
->buf
);
3988 remote_notif_get_pending_events (notif
);
3991 if (thread_count () == 0)
3994 error (_("The target is not running (try extended-remote?)"));
3996 /* We're connected, but not running. Drop out before we
3997 call start_remote. */
3998 rs
->starting_up
= 0;
4002 /* Let the stub know that we want it to return the thread. */
4004 /* Force the stub to choose a thread. */
4005 set_general_thread (null_ptid
);
4008 current_ptid
= remote_current_thread (minus_one_ptid
);
4009 if (ptid_equal (inferior_ptid
, minus_one_ptid
))
4010 error (_("remote didn't report the current thread in non-stop mode"));
4012 inferior_ptid
= current_ptid
;
4013 get_offsets (); /* Get text, data & bss offsets. */
4015 /* In non-stop mode, any cached wait status will be stored in
4016 the stop reply queue. */
4017 gdb_assert (wait_status
== NULL
);
4019 /* Report all signals during attach/startup. */
4020 remote_pass_signals (target
, 0, NULL
);
4022 /* If there are already stopped threads, mark them stopped and
4023 report their stops before giving the prompt to the user. */
4024 process_initial_stop_replies ();
4026 switch_to_thread (current_ptid
);
4028 if (target_can_async_p ())
4032 /* If we connected to a live target, do some additional setup. */
4033 if (target_has_execution
)
4035 if (symfile_objfile
) /* No use without a symbol-file. */
4036 remote_check_symbols ();
4039 /* Possibly the target has been engaged in a trace run started
4040 previously; find out where things are at. */
4041 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4043 struct uploaded_tp
*uploaded_tps
= NULL
;
4045 if (current_trace_status ()->running
)
4046 printf_filtered (_("Trace is already running on the target.\n"));
4048 remote_upload_tracepoints (target
, &uploaded_tps
);
4050 merge_uploaded_tracepoints (&uploaded_tps
);
4053 /* The thread and inferior lists are now synchronized with the
4054 target, our symbols have been relocated, and we're merged the
4055 target's tracepoints with ours. We're done with basic start
4057 rs
->starting_up
= 0;
4059 /* Maybe breakpoints are global and need to be inserted now. */
4060 if (breakpoints_should_be_inserted_now ())
4061 insert_breakpoints ();
4064 /* Open a connection to a remote debugger.
4065 NAME is the filename used for communication. */
4068 remote_open (const char *name
, int from_tty
)
4070 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
4073 /* Open a connection to a remote debugger using the extended
4074 remote gdb protocol. NAME is the filename used for communication. */
4077 extended_remote_open (const char *name
, int from_tty
)
4079 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
4082 /* Reset all packets back to "unknown support". Called when opening a
4083 new connection to a remote target. */
4086 reset_all_packet_configs_support (void)
4090 for (i
= 0; i
< PACKET_MAX
; i
++)
4091 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4094 /* Initialize all packet configs. */
4097 init_all_packet_configs (void)
4101 for (i
= 0; i
< PACKET_MAX
; i
++)
4103 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
4104 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4108 /* Symbol look-up. */
4111 remote_check_symbols (void)
4113 struct remote_state
*rs
= get_remote_state ();
4114 char *msg
, *reply
, *tmp
;
4115 struct bound_minimal_symbol sym
;
4117 struct cleanup
*old_chain
;
4119 /* The remote side has no concept of inferiors that aren't running
4120 yet, it only knows about running processes. If we're connected
4121 but our current inferior is not running, we should not invite the
4122 remote target to request symbol lookups related to its
4123 (unrelated) current process. */
4124 if (!target_has_execution
)
4127 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
4130 /* Make sure the remote is pointing at the right process. Note
4131 there's no way to select "no process". */
4132 set_general_process ();
4134 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4135 because we need both at the same time. */
4136 msg
= (char *) xmalloc (get_remote_packet_size ());
4137 old_chain
= make_cleanup (xfree
, msg
);
4139 /* Invite target to request symbol lookups. */
4141 putpkt ("qSymbol::");
4142 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4143 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSymbol
]);
4146 while (startswith (reply
, "qSymbol:"))
4148 struct bound_minimal_symbol sym
;
4151 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
4153 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
4154 if (sym
.minsym
== NULL
)
4155 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
4158 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
4159 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
4161 /* If this is a function address, return the start of code
4162 instead of any data function descriptor. */
4163 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4167 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
4168 phex_nz (sym_addr
, addr_size
), &reply
[8]);
4172 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4176 do_cleanups (old_chain
);
4179 static struct serial
*
4180 remote_serial_open (const char *name
)
4182 static int udp_warning
= 0;
4184 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4185 of in ser-tcp.c, because it is the remote protocol assuming that the
4186 serial connection is reliable and not the serial connection promising
4188 if (!udp_warning
&& startswith (name
, "udp:"))
4190 warning (_("The remote protocol may be unreliable over UDP.\n"
4191 "Some events may be lost, rendering further debugging "
4196 return serial_open (name
);
4199 /* Inform the target of our permission settings. The permission flags
4200 work without this, but if the target knows the settings, it can do
4201 a couple things. First, it can add its own check, to catch cases
4202 that somehow manage to get by the permissions checks in target
4203 methods. Second, if the target is wired to disallow particular
4204 settings (for instance, a system in the field that is not set up to
4205 be able to stop at a breakpoint), it can object to any unavailable
4209 remote_set_permissions (struct target_ops
*self
)
4211 struct remote_state
*rs
= get_remote_state ();
4213 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAllow:"
4214 "WriteReg:%x;WriteMem:%x;"
4215 "InsertBreak:%x;InsertTrace:%x;"
4216 "InsertFastTrace:%x;Stop:%x",
4217 may_write_registers
, may_write_memory
,
4218 may_insert_breakpoints
, may_insert_tracepoints
,
4219 may_insert_fast_tracepoints
, may_stop
);
4221 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4223 /* If the target didn't like the packet, warn the user. Do not try
4224 to undo the user's settings, that would just be maddening. */
4225 if (strcmp (rs
->buf
, "OK") != 0)
4226 warning (_("Remote refused setting permissions with: %s"), rs
->buf
);
4229 /* This type describes each known response to the qSupported
4231 struct protocol_feature
4233 /* The name of this protocol feature. */
4236 /* The default for this protocol feature. */
4237 enum packet_support default_support
;
4239 /* The function to call when this feature is reported, or after
4240 qSupported processing if the feature is not supported.
4241 The first argument points to this structure. The second
4242 argument indicates whether the packet requested support be
4243 enabled, disabled, or probed (or the default, if this function
4244 is being called at the end of processing and this feature was
4245 not reported). The third argument may be NULL; if not NULL, it
4246 is a NUL-terminated string taken from the packet following
4247 this feature's name and an equals sign. */
4248 void (*func
) (const struct protocol_feature
*, enum packet_support
,
4251 /* The corresponding packet for this feature. Only used if
4252 FUNC is remote_supported_packet. */
4257 remote_supported_packet (const struct protocol_feature
*feature
,
4258 enum packet_support support
,
4259 const char *argument
)
4263 warning (_("Remote qSupported response supplied an unexpected value for"
4264 " \"%s\"."), feature
->name
);
4268 remote_protocol_packets
[feature
->packet
].support
= support
;
4272 remote_packet_size (const struct protocol_feature
*feature
,
4273 enum packet_support support
, const char *value
)
4275 struct remote_state
*rs
= get_remote_state ();
4280 if (support
!= PACKET_ENABLE
)
4283 if (value
== NULL
|| *value
== '\0')
4285 warning (_("Remote target reported \"%s\" without a size."),
4291 packet_size
= strtol (value
, &value_end
, 16);
4292 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
4294 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
4295 feature
->name
, value
);
4299 /* Record the new maximum packet size. */
4300 rs
->explicit_packet_size
= packet_size
;
4303 static const struct protocol_feature remote_protocol_features
[] = {
4304 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
4305 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
4306 PACKET_qXfer_auxv
},
4307 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
4308 PACKET_qXfer_exec_file
},
4309 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
4310 PACKET_qXfer_features
},
4311 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
4312 PACKET_qXfer_libraries
},
4313 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
4314 PACKET_qXfer_libraries_svr4
},
4315 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
4316 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
4317 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
4318 PACKET_qXfer_memory_map
},
4319 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
4320 PACKET_qXfer_spu_read
},
4321 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
4322 PACKET_qXfer_spu_write
},
4323 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
4324 PACKET_qXfer_osdata
},
4325 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
4326 PACKET_qXfer_threads
},
4327 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
4328 PACKET_qXfer_traceframe_info
},
4329 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
4330 PACKET_QPassSignals
},
4331 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
4332 PACKET_QProgramSignals
},
4333 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
4334 PACKET_QStartNoAckMode
},
4335 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
4336 PACKET_multiprocess_feature
},
4337 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
4338 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
4339 PACKET_qXfer_siginfo_read
},
4340 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
4341 PACKET_qXfer_siginfo_write
},
4342 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4343 PACKET_ConditionalTracepoints
},
4344 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
4345 PACKET_ConditionalBreakpoints
},
4346 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
4347 PACKET_BreakpointCommands
},
4348 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4349 PACKET_FastTracepoints
},
4350 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4351 PACKET_StaticTracepoints
},
4352 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
4353 PACKET_InstallInTrace
},
4354 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
4355 PACKET_DisconnectedTracing_feature
},
4356 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
4358 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
4360 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
4361 PACKET_TracepointSource
},
4362 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
4364 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4365 PACKET_EnableDisableTracepoints_feature
},
4366 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
4367 PACKET_qXfer_fdpic
},
4368 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
4370 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
4371 PACKET_QDisableRandomization
},
4372 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
4373 { "QTBuffer:size", PACKET_DISABLE
,
4374 remote_supported_packet
, PACKET_QTBuffer_size
},
4375 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
4376 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
4377 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
4378 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
4379 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
4380 PACKET_qXfer_btrace
},
4381 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
4382 PACKET_qXfer_btrace_conf
},
4383 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
4384 PACKET_Qbtrace_conf_bts_size
},
4385 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
4386 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
4387 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
4388 PACKET_fork_event_feature
},
4389 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
4390 PACKET_vfork_event_feature
},
4391 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
4392 PACKET_exec_event_feature
},
4393 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
4394 PACKET_Qbtrace_conf_pt_size
},
4395 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
}
4398 static char *remote_support_xml
;
4400 /* Register string appended to "xmlRegisters=" in qSupported query. */
4403 register_remote_support_xml (const char *xml
)
4405 #if defined(HAVE_LIBEXPAT)
4406 if (remote_support_xml
== NULL
)
4407 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
4410 char *copy
= xstrdup (remote_support_xml
+ 13);
4411 char *p
= strtok (copy
, ",");
4415 if (strcmp (p
, xml
) == 0)
4422 while ((p
= strtok (NULL
, ",")) != NULL
);
4425 remote_support_xml
= reconcat (remote_support_xml
,
4426 remote_support_xml
, ",", xml
,
4433 remote_query_supported_append (char *msg
, const char *append
)
4436 return reconcat (msg
, msg
, ";", append
, (char *) NULL
);
4438 return xstrdup (append
);
4442 remote_query_supported (void)
4444 struct remote_state
*rs
= get_remote_state ();
4447 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
4449 /* The packet support flags are handled differently for this packet
4450 than for most others. We treat an error, a disabled packet, and
4451 an empty response identically: any features which must be reported
4452 to be used will be automatically disabled. An empty buffer
4453 accomplishes this, since that is also the representation for a list
4454 containing no features. */
4457 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
4460 struct cleanup
*old_chain
= make_cleanup (free_current_contents
, &q
);
4462 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
4463 q
= remote_query_supported_append (q
, "multiprocess+");
4465 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4466 q
= remote_query_supported_append (q
, "swbreak+");
4467 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4468 q
= remote_query_supported_append (q
, "hwbreak+");
4470 q
= remote_query_supported_append (q
, "qRelocInsn+");
4474 if (packet_set_cmd_state (PACKET_fork_event_feature
)
4475 != AUTO_BOOLEAN_FALSE
)
4476 q
= remote_query_supported_append (q
, "fork-events+");
4477 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
4478 != AUTO_BOOLEAN_FALSE
)
4479 q
= remote_query_supported_append (q
, "vfork-events+");
4480 if (packet_set_cmd_state (PACKET_exec_event_feature
)
4481 != AUTO_BOOLEAN_FALSE
)
4482 q
= remote_query_supported_append (q
, "exec-events+");
4485 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
4486 q
= remote_query_supported_append (q
, "vContSupported+");
4488 /* Keep this one last to work around a gdbserver <= 7.10 bug in
4489 the qSupported:xmlRegisters=i386 handling. */
4490 if (remote_support_xml
!= NULL
)
4491 q
= remote_query_supported_append (q
, remote_support_xml
);
4493 q
= reconcat (q
, "qSupported:", q
, (char *) NULL
);
4496 do_cleanups (old_chain
);
4498 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4500 /* If an error occured, warn, but do not return - just reset the
4501 buffer to empty and go on to disable features. */
4502 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
4505 warning (_("Remote failure reply: %s"), rs
->buf
);
4510 memset (seen
, 0, sizeof (seen
));
4515 enum packet_support is_supported
;
4516 char *p
, *end
, *name_end
, *value
;
4518 /* First separate out this item from the rest of the packet. If
4519 there's another item after this, we overwrite the separator
4520 (terminated strings are much easier to work with). */
4522 end
= strchr (p
, ';');
4525 end
= p
+ strlen (p
);
4535 warning (_("empty item in \"qSupported\" response"));
4540 name_end
= strchr (p
, '=');
4543 /* This is a name=value entry. */
4544 is_supported
= PACKET_ENABLE
;
4545 value
= name_end
+ 1;
4554 is_supported
= PACKET_ENABLE
;
4558 is_supported
= PACKET_DISABLE
;
4562 is_supported
= PACKET_SUPPORT_UNKNOWN
;
4566 warning (_("unrecognized item \"%s\" "
4567 "in \"qSupported\" response"), p
);
4573 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4574 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
4576 const struct protocol_feature
*feature
;
4579 feature
= &remote_protocol_features
[i
];
4580 feature
->func (feature
, is_supported
, value
);
4585 /* If we increased the packet size, make sure to increase the global
4586 buffer size also. We delay this until after parsing the entire
4587 qSupported packet, because this is the same buffer we were
4589 if (rs
->buf_size
< rs
->explicit_packet_size
)
4591 rs
->buf_size
= rs
->explicit_packet_size
;
4592 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
4595 /* Handle the defaults for unmentioned features. */
4596 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4599 const struct protocol_feature
*feature
;
4601 feature
= &remote_protocol_features
[i
];
4602 feature
->func (feature
, feature
->default_support
, NULL
);
4606 /* Remove any of the remote.c targets from target stack. Upper targets depend
4607 on it so remove them first. */
4610 remote_unpush_target (void)
4612 pop_all_targets_at_and_above (process_stratum
);
4616 remote_open_1 (const char *name
, int from_tty
,
4617 struct target_ops
*target
, int extended_p
)
4619 struct remote_state
*rs
= get_remote_state ();
4622 error (_("To open a remote debug connection, you need to specify what\n"
4623 "serial device is attached to the remote system\n"
4624 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
4626 /* See FIXME above. */
4627 if (!target_async_permitted
)
4628 wait_forever_enabled_p
= 1;
4630 /* If we're connected to a running target, target_preopen will kill it.
4631 Ask this question first, before target_preopen has a chance to kill
4633 if (rs
->remote_desc
!= NULL
&& !have_inferiors ())
4636 && !query (_("Already connected to a remote target. Disconnect? ")))
4637 error (_("Still connected."));
4640 /* Here the possibly existing remote target gets unpushed. */
4641 target_preopen (from_tty
);
4643 /* Make sure we send the passed signals list the next time we resume. */
4644 xfree (rs
->last_pass_packet
);
4645 rs
->last_pass_packet
= NULL
;
4647 /* Make sure we send the program signals list the next time we
4649 xfree (rs
->last_program_signals_packet
);
4650 rs
->last_program_signals_packet
= NULL
;
4652 remote_fileio_reset ();
4653 reopen_exec_file ();
4656 rs
->remote_desc
= remote_serial_open (name
);
4657 if (!rs
->remote_desc
)
4658 perror_with_name (name
);
4660 if (baud_rate
!= -1)
4662 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
4664 /* The requested speed could not be set. Error out to
4665 top level after closing remote_desc. Take care to
4666 set remote_desc to NULL to avoid closing remote_desc
4668 serial_close (rs
->remote_desc
);
4669 rs
->remote_desc
= NULL
;
4670 perror_with_name (name
);
4674 serial_setparity (rs
->remote_desc
, serial_parity
);
4675 serial_raw (rs
->remote_desc
);
4677 /* If there is something sitting in the buffer we might take it as a
4678 response to a command, which would be bad. */
4679 serial_flush_input (rs
->remote_desc
);
4683 puts_filtered ("Remote debugging using ");
4684 puts_filtered (name
);
4685 puts_filtered ("\n");
4687 push_target (target
); /* Switch to using remote target now. */
4689 /* Register extra event sources in the event loop. */
4690 remote_async_inferior_event_token
4691 = create_async_event_handler (remote_async_inferior_event_handler
,
4693 rs
->notif_state
= remote_notif_state_allocate ();
4695 /* Reset the target state; these things will be queried either by
4696 remote_query_supported or as they are needed. */
4697 reset_all_packet_configs_support ();
4698 rs
->cached_wait_status
= 0;
4699 rs
->explicit_packet_size
= 0;
4701 rs
->extended
= extended_p
;
4702 rs
->waiting_for_stop_reply
= 0;
4703 rs
->ctrlc_pending_p
= 0;
4705 rs
->general_thread
= not_sent_ptid
;
4706 rs
->continue_thread
= not_sent_ptid
;
4707 rs
->remote_traceframe_number
= -1;
4709 /* Probe for ability to use "ThreadInfo" query, as required. */
4710 rs
->use_threadinfo_query
= 1;
4711 rs
->use_threadextra_query
= 1;
4713 readahead_cache_invalidate ();
4715 if (target_async_permitted
)
4717 /* With this target we start out by owning the terminal. */
4718 remote_async_terminal_ours_p
= 1;
4720 /* FIXME: cagney/1999-09-23: During the initial connection it is
4721 assumed that the target is already ready and able to respond to
4722 requests. Unfortunately remote_start_remote() eventually calls
4723 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
4724 around this. Eventually a mechanism that allows
4725 wait_for_inferior() to expect/get timeouts will be
4727 wait_forever_enabled_p
= 0;
4730 /* First delete any symbols previously loaded from shared libraries. */
4731 no_shared_libraries (NULL
, 0);
4734 init_thread_list ();
4736 /* Start the remote connection. If error() or QUIT, discard this
4737 target (we'd otherwise be in an inconsistent state) and then
4738 propogate the error on up the exception chain. This ensures that
4739 the caller doesn't stumble along blindly assuming that the
4740 function succeeded. The CLI doesn't have this problem but other
4741 UI's, such as MI do.
4743 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
4744 this function should return an error indication letting the
4745 caller restore the previous state. Unfortunately the command
4746 ``target remote'' is directly wired to this function making that
4747 impossible. On a positive note, the CLI side of this problem has
4748 been fixed - the function set_cmd_context() makes it possible for
4749 all the ``target ....'' commands to share a common callback
4750 function. See cli-dump.c. */
4755 remote_start_remote (from_tty
, target
, extended_p
);
4757 CATCH (ex
, RETURN_MASK_ALL
)
4759 /* Pop the partially set up target - unless something else did
4760 already before throwing the exception. */
4761 if (rs
->remote_desc
!= NULL
)
4762 remote_unpush_target ();
4763 if (target_async_permitted
)
4764 wait_forever_enabled_p
= 1;
4765 throw_exception (ex
);
4770 remote_btrace_reset ();
4772 if (target_async_permitted
)
4773 wait_forever_enabled_p
= 1;
4776 /* Detach the specified process. */
4779 remote_detach_pid (int pid
)
4781 struct remote_state
*rs
= get_remote_state ();
4783 if (remote_multi_process_p (rs
))
4784 xsnprintf (rs
->buf
, get_remote_packet_size (), "D;%x", pid
);
4786 strcpy (rs
->buf
, "D");
4789 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4791 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
4793 else if (rs
->buf
[0] == '\0')
4794 error (_("Remote doesn't know how to detach"));
4796 error (_("Can't detach process."));
4799 /* This detaches a program to which we previously attached, using
4800 inferior_ptid to identify the process. After this is done, GDB
4801 can be used to debug some other program. We better not have left
4802 any breakpoints in the target program or it'll die when it hits
4806 remote_detach_1 (const char *args
, int from_tty
)
4808 int pid
= ptid_get_pid (inferior_ptid
);
4809 struct remote_state
*rs
= get_remote_state ();
4810 struct thread_info
*tp
= find_thread_ptid (inferior_ptid
);
4814 error (_("Argument given to \"detach\" when remotely debugging."));
4816 if (!target_has_execution
)
4817 error (_("No process to detach from."));
4821 char *exec_file
= get_exec_file (0);
4822 if (exec_file
== NULL
)
4824 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
4825 target_pid_to_str (pid_to_ptid (pid
)));
4826 gdb_flush (gdb_stdout
);
4829 /* Tell the remote target to detach. */
4830 remote_detach_pid (pid
);
4832 if (from_tty
&& !rs
->extended
)
4833 puts_filtered (_("Ending remote debugging.\n"));
4835 /* Check to see if we are detaching a fork parent. Note that if we
4836 are detaching a fork child, tp == NULL. */
4837 is_fork_parent
= (tp
!= NULL
4838 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
4840 /* If doing detach-on-fork, we don't mourn, because that will delete
4841 breakpoints that should be available for the followed inferior. */
4842 if (!is_fork_parent
)
4843 target_mourn_inferior ();
4846 inferior_ptid
= null_ptid
;
4847 detach_inferior (pid
);
4852 remote_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
4854 remote_detach_1 (args
, from_tty
);
4858 extended_remote_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
4860 remote_detach_1 (args
, from_tty
);
4863 /* Target follow-fork function for remote targets. On entry, and
4864 at return, the current inferior is the fork parent.
4866 Note that although this is currently only used for extended-remote,
4867 it is named remote_follow_fork in anticipation of using it for the
4868 remote target as well. */
4871 remote_follow_fork (struct target_ops
*ops
, int follow_child
,
4874 struct remote_state
*rs
= get_remote_state ();
4875 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
4877 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
4878 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
4880 /* When following the parent and detaching the child, we detach
4881 the child here. For the case of following the child and
4882 detaching the parent, the detach is done in the target-
4883 independent follow fork code in infrun.c. We can't use
4884 target_detach when detaching an unfollowed child because
4885 the client side doesn't know anything about the child. */
4886 if (detach_fork
&& !follow_child
)
4888 /* Detach the fork child. */
4892 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
4893 child_pid
= ptid_get_pid (child_ptid
);
4895 remote_detach_pid (child_pid
);
4896 detach_inferior (child_pid
);
4902 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
4903 in the program space of the new inferior. On entry and at return the
4904 current inferior is the exec'ing inferior. INF is the new exec'd
4905 inferior, which may be the same as the exec'ing inferior unless
4906 follow-exec-mode is "new". */
4909 remote_follow_exec (struct target_ops
*ops
,
4910 struct inferior
*inf
, char *execd_pathname
)
4912 /* We know that this is a target file name, so if it has the "target:"
4913 prefix we strip it off before saving it in the program space. */
4914 if (is_target_filename (execd_pathname
))
4915 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
4917 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
4920 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
4923 remote_disconnect (struct target_ops
*target
, const char *args
, int from_tty
)
4926 error (_("Argument given to \"disconnect\" when remotely debugging."));
4928 /* Make sure we unpush even the extended remote targets; mourn
4929 won't do it. So call remote_mourn directly instead of
4930 target_mourn_inferior. */
4931 remote_mourn (target
);
4934 puts_filtered ("Ending remote debugging.\n");
4937 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
4938 be chatty about it. */
4941 extended_remote_attach (struct target_ops
*target
, const char *args
,
4944 struct remote_state
*rs
= get_remote_state ();
4946 char *wait_status
= NULL
;
4948 pid
= parse_pid_to_attach (args
);
4950 /* Remote PID can be freely equal to getpid, do not check it here the same
4951 way as in other targets. */
4953 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
4954 error (_("This target does not support attaching to a process"));
4958 char *exec_file
= get_exec_file (0);
4961 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
4962 target_pid_to_str (pid_to_ptid (pid
)));
4964 printf_unfiltered (_("Attaching to %s\n"),
4965 target_pid_to_str (pid_to_ptid (pid
)));
4967 gdb_flush (gdb_stdout
);
4970 xsnprintf (rs
->buf
, get_remote_packet_size (), "vAttach;%x", pid
);
4972 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4974 switch (packet_ok (rs
->buf
,
4975 &remote_protocol_packets
[PACKET_vAttach
]))
4980 /* Save the reply for later. */
4981 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
4982 strcpy (wait_status
, rs
->buf
);
4984 else if (strcmp (rs
->buf
, "OK") != 0)
4985 error (_("Attaching to %s failed with: %s"),
4986 target_pid_to_str (pid_to_ptid (pid
)),
4989 case PACKET_UNKNOWN
:
4990 error (_("This target does not support attaching to a process"));
4992 error (_("Attaching to %s failed"),
4993 target_pid_to_str (pid_to_ptid (pid
)));
4996 set_current_inferior (remote_add_inferior (0, pid
, 1, 0));
4998 inferior_ptid
= pid_to_ptid (pid
);
5002 struct thread_info
*thread
;
5004 /* Get list of threads. */
5005 remote_update_thread_list (target
);
5007 thread
= first_thread_of_process (pid
);
5009 inferior_ptid
= thread
->ptid
;
5011 inferior_ptid
= pid_to_ptid (pid
);
5013 /* Invalidate our notion of the remote current thread. */
5014 record_currthread (rs
, minus_one_ptid
);
5018 /* Now, if we have thread information, update inferior_ptid. */
5019 inferior_ptid
= remote_current_thread (inferior_ptid
);
5021 /* Add the main thread to the thread list. */
5022 add_thread_silent (inferior_ptid
);
5025 /* Next, if the target can specify a description, read it. We do
5026 this before anything involving memory or registers. */
5027 target_find_description ();
5031 /* Use the previously fetched status. */
5032 gdb_assert (wait_status
!= NULL
);
5034 if (target_can_async_p ())
5036 struct notif_event
*reply
5037 = remote_notif_parse (¬if_client_stop
, wait_status
);
5039 push_stop_reply ((struct stop_reply
*) reply
);
5045 gdb_assert (wait_status
!= NULL
);
5046 strcpy (rs
->buf
, wait_status
);
5047 rs
->cached_wait_status
= 1;
5051 gdb_assert (wait_status
== NULL
);
5054 /* Implementation of the to_post_attach method. */
5057 extended_remote_post_attach (struct target_ops
*ops
, int pid
)
5059 /* In certain cases GDB might not have had the chance to start
5060 symbol lookup up until now. This could happen if the debugged
5061 binary is not using shared libraries, the vsyscall page is not
5062 present (on Linux) and the binary itself hadn't changed since the
5063 debugging process was started. */
5064 if (symfile_objfile
!= NULL
)
5065 remote_check_symbols();
5069 /* Check for the availability of vCont. This function should also check
5073 remote_vcont_probe (struct remote_state
*rs
)
5077 strcpy (rs
->buf
, "vCont?");
5079 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5082 /* Make sure that the features we assume are supported. */
5083 if (startswith (buf
, "vCont"))
5086 int support_c
, support_C
;
5088 rs
->supports_vCont
.s
= 0;
5089 rs
->supports_vCont
.S
= 0;
5092 rs
->supports_vCont
.t
= 0;
5093 rs
->supports_vCont
.r
= 0;
5094 while (p
&& *p
== ';')
5097 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5098 rs
->supports_vCont
.s
= 1;
5099 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5100 rs
->supports_vCont
.S
= 1;
5101 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5103 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5105 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5106 rs
->supports_vCont
.t
= 1;
5107 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5108 rs
->supports_vCont
.r
= 1;
5110 p
= strchr (p
, ';');
5113 /* If c, and C are not all supported, we can't use vCont. Clearing
5114 BUF will make packet_ok disable the packet. */
5115 if (!support_c
|| !support_C
)
5119 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
5122 /* Helper function for building "vCont" resumptions. Write a
5123 resumption to P. ENDP points to one-passed-the-end of the buffer
5124 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5125 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5126 resumed thread should be single-stepped and/or signalled. If PTID
5127 equals minus_one_ptid, then all threads are resumed; if PTID
5128 represents a process, then all threads of the process are resumed;
5129 the thread to be stepped and/or signalled is given in the global
5133 append_resumption (char *p
, char *endp
,
5134 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5136 struct remote_state
*rs
= get_remote_state ();
5138 if (step
&& siggnal
!= GDB_SIGNAL_0
)
5139 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
5141 /* GDB is willing to range step. */
5142 && use_range_stepping
5143 /* Target supports range stepping. */
5144 && rs
->supports_vCont
.r
5145 /* We don't currently support range stepping multiple
5146 threads with a wildcard (though the protocol allows it,
5147 so stubs shouldn't make an active effort to forbid
5149 && !(remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
5151 struct thread_info
*tp
;
5153 if (ptid_equal (ptid
, minus_one_ptid
))
5155 /* If we don't know about the target thread's tid, then
5156 we're resuming magic_null_ptid (see caller). */
5157 tp
= find_thread_ptid (magic_null_ptid
);
5160 tp
= find_thread_ptid (ptid
);
5161 gdb_assert (tp
!= NULL
);
5163 if (tp
->control
.may_range_step
)
5165 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
5167 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
5168 phex_nz (tp
->control
.step_range_start
,
5170 phex_nz (tp
->control
.step_range_end
,
5174 p
+= xsnprintf (p
, endp
- p
, ";s");
5177 p
+= xsnprintf (p
, endp
- p
, ";s");
5178 else if (siggnal
!= GDB_SIGNAL_0
)
5179 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
5181 p
+= xsnprintf (p
, endp
- p
, ";c");
5183 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
5187 /* All (-1) threads of process. */
5188 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
5190 p
+= xsnprintf (p
, endp
- p
, ":");
5191 p
= write_ptid (p
, endp
, nptid
);
5193 else if (!ptid_equal (ptid
, minus_one_ptid
))
5195 p
+= xsnprintf (p
, endp
- p
, ":");
5196 p
= write_ptid (p
, endp
, ptid
);
5202 /* Append a vCont continue-with-signal action for threads that have a
5203 non-zero stop signal. */
5206 append_pending_thread_resumptions (char *p
, char *endp
, ptid_t ptid
)
5208 struct thread_info
*thread
;
5210 ALL_NON_EXITED_THREADS (thread
)
5211 if (ptid_match (thread
->ptid
, ptid
)
5212 && !ptid_equal (inferior_ptid
, thread
->ptid
)
5213 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
5215 p
= append_resumption (p
, endp
, thread
->ptid
,
5216 0, thread
->suspend
.stop_signal
);
5217 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
5223 /* Resume the remote inferior by using a "vCont" packet. The thread
5224 to be resumed is PTID; STEP and SIGGNAL indicate whether the
5225 resumed thread should be single-stepped and/or signalled. If PTID
5226 equals minus_one_ptid, then all threads are resumed; the thread to
5227 be stepped and/or signalled is given in the global INFERIOR_PTID.
5228 This function returns non-zero iff it resumes the inferior.
5230 This function issues a strict subset of all possible vCont commands at the
5234 remote_vcont_resume (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5236 struct remote_state
*rs
= get_remote_state ();
5240 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
5241 remote_vcont_probe (rs
);
5243 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
5247 endp
= rs
->buf
+ get_remote_packet_size ();
5249 /* If we could generate a wider range of packets, we'd have to worry
5250 about overflowing BUF. Should there be a generic
5251 "multi-part-packet" packet? */
5253 p
+= xsnprintf (p
, endp
- p
, "vCont");
5255 if (ptid_equal (ptid
, magic_null_ptid
))
5257 /* MAGIC_NULL_PTID means that we don't have any active threads,
5258 so we don't have any TID numbers the inferior will
5259 understand. Make sure to only send forms that do not specify
5261 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
5263 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
5265 /* Resume all threads (of all processes, or of a single
5266 process), with preference for INFERIOR_PTID. This assumes
5267 inferior_ptid belongs to the set of all threads we are about
5269 if (step
|| siggnal
!= GDB_SIGNAL_0
)
5271 /* Step inferior_ptid, with or without signal. */
5272 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
5275 /* Also pass down any pending signaled resumption for other
5276 threads not the current. */
5277 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
5279 /* And continue others without a signal. */
5280 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
5284 /* Scheduler locking; resume only PTID. */
5285 append_resumption (p
, endp
, ptid
, step
, siggnal
);
5288 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
5293 /* In non-stop, the stub replies to vCont with "OK". The stop
5294 reply will be reported asynchronously by means of a `%Stop'
5296 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5297 if (strcmp (rs
->buf
, "OK") != 0)
5298 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5304 /* Tell the remote machine to resume. */
5307 remote_resume (struct target_ops
*ops
,
5308 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5310 struct remote_state
*rs
= get_remote_state ();
5313 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
5314 (explained in remote-notif.c:handle_notification) so
5315 remote_notif_process is not called. We need find a place where
5316 it is safe to start a 'vNotif' sequence. It is good to do it
5317 before resuming inferior, because inferior was stopped and no RSP
5318 traffic at that moment. */
5320 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
5322 rs
->last_sent_signal
= siggnal
;
5323 rs
->last_sent_step
= step
;
5325 /* The vCont packet doesn't need to specify threads via Hc. */
5326 /* No reverse support (yet) for vCont. */
5327 if (execution_direction
!= EXEC_REVERSE
)
5328 if (remote_vcont_resume (ptid
, step
, siggnal
))
5331 /* All other supported resume packets do use Hc, so set the continue
5333 if (ptid_equal (ptid
, minus_one_ptid
))
5334 set_continue_thread (any_thread_ptid
);
5336 set_continue_thread (ptid
);
5339 if (execution_direction
== EXEC_REVERSE
)
5341 /* We don't pass signals to the target in reverse exec mode. */
5342 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
5343 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
5346 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
5347 error (_("Remote reverse-step not supported."));
5348 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
5349 error (_("Remote reverse-continue not supported."));
5351 strcpy (buf
, step
? "bs" : "bc");
5353 else if (siggnal
!= GDB_SIGNAL_0
)
5355 buf
[0] = step
? 'S' : 'C';
5356 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
5357 buf
[2] = tohex (((int) siggnal
) & 0xf);
5361 strcpy (buf
, step
? "s" : "c");
5366 /* We are about to start executing the inferior, let's register it
5367 with the event loop. NOTE: this is the one place where all the
5368 execution commands end up. We could alternatively do this in each
5369 of the execution commands in infcmd.c. */
5370 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
5371 into infcmd.c in order to allow inferior function calls to work
5372 NOT asynchronously. */
5373 if (target_can_async_p ())
5376 /* We've just told the target to resume. The remote server will
5377 wait for the inferior to stop, and then send a stop reply. In
5378 the mean time, we can't start another command/query ourselves
5379 because the stub wouldn't be ready to process it. This applies
5380 only to the base all-stop protocol, however. In non-stop (which
5381 only supports vCont), the stub replies with an "OK", and is
5382 immediate able to process further serial input. */
5384 rs
->waiting_for_stop_reply
= 1;
5388 /* Set up the signal handler for SIGINT, while the target is
5389 executing, ovewriting the 'regular' SIGINT signal handler. */
5391 async_initialize_sigint_signal_handler (void)
5393 signal (SIGINT
, async_handle_remote_sigint
);
5396 /* Signal handler for SIGINT, while the target is executing. */
5398 async_handle_remote_sigint (int sig
)
5400 signal (sig
, async_handle_remote_sigint_twice
);
5401 /* Note we need to go through gdb_call_async_signal_handler in order
5402 to wake up the event loop on Windows. */
5403 gdb_call_async_signal_handler (async_sigint_remote_token
, 0);
5406 /* Signal handler for SIGINT, installed after SIGINT has already been
5407 sent once. It will take effect the second time that the user sends
5410 async_handle_remote_sigint_twice (int sig
)
5412 signal (sig
, async_handle_remote_sigint
);
5413 /* See note in async_handle_remote_sigint. */
5414 gdb_call_async_signal_handler (async_sigint_remote_twice_token
, 0);
5417 /* Implementation of to_check_pending_interrupt. */
5420 remote_check_pending_interrupt (struct target_ops
*self
)
5422 struct async_signal_handler
*token
= async_sigint_remote_twice_token
;
5424 if (async_signal_handler_is_marked (token
))
5426 clear_async_signal_handler (token
);
5427 call_async_signal_handler (token
);
5431 /* Perform the real interruption of the target execution, in response
5434 async_remote_interrupt (gdb_client_data arg
)
5437 fprintf_unfiltered (gdb_stdlog
, "async_remote_interrupt called\n");
5439 target_stop (inferior_ptid
);
5442 /* Perform interrupt, if the first attempt did not succeed. Just give
5443 up on the target alltogether. */
5445 async_remote_interrupt_twice (gdb_client_data arg
)
5448 fprintf_unfiltered (gdb_stdlog
, "async_remote_interrupt_twice called\n");
5453 /* Reinstall the usual SIGINT handlers, after the target has
5456 async_cleanup_sigint_signal_handler (void *dummy
)
5458 signal (SIGINT
, handle_sigint
);
5461 /* Send ^C to target to halt it. Target will respond, and send us a
5463 static void (*ofunc
) (int);
5465 /* The command line interface's interrupt routine. This function is installed
5466 as a signal handler for SIGINT. The first time a user requests an
5467 interrupt, we call remote_interrupt to send a break or ^C. If there is no
5468 response from the target (it didn't stop when the user requested it),
5469 we ask the user if he'd like to detach from the target. */
5472 sync_remote_interrupt (int signo
)
5474 /* If this doesn't work, try more severe steps. */
5475 signal (signo
, sync_remote_interrupt_twice
);
5477 gdb_call_async_signal_handler (async_sigint_remote_token
, 1);
5480 /* The user typed ^C twice. */
5483 sync_remote_interrupt_twice (int signo
)
5485 signal (signo
, ofunc
);
5486 gdb_call_async_signal_handler (async_sigint_remote_twice_token
, 1);
5487 signal (signo
, sync_remote_interrupt
);
5490 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
5491 thread, all threads of a remote process, or all threads of all
5495 remote_stop_ns (ptid_t ptid
)
5497 struct remote_state
*rs
= get_remote_state ();
5499 char *endp
= rs
->buf
+ get_remote_packet_size ();
5501 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
5502 remote_vcont_probe (rs
);
5504 if (!rs
->supports_vCont
.t
)
5505 error (_("Remote server does not support stopping threads"));
5507 if (ptid_equal (ptid
, minus_one_ptid
)
5508 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
5509 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
5514 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
5516 if (ptid_is_pid (ptid
))
5517 /* All (-1) threads of process. */
5518 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
5521 /* Small optimization: if we already have a stop reply for
5522 this thread, no use in telling the stub we want this
5524 if (peek_stop_reply (ptid
))
5530 write_ptid (p
, endp
, nptid
);
5533 /* In non-stop, we get an immediate OK reply. The stop reply will
5534 come in asynchronously by notification. */
5536 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5537 if (strcmp (rs
->buf
, "OK") != 0)
5538 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
5541 /* All-stop version of target_interrupt. Sends a break or a ^C to
5542 interrupt the remote target. It is undefined which thread of which
5543 process reports the interrupt. */
5546 remote_interrupt_as (ptid_t ptid
)
5548 struct remote_state
*rs
= get_remote_state ();
5550 rs
->ctrlc_pending_p
= 1;
5552 /* If the inferior is stopped already, but the core didn't know
5553 about it yet, just ignore the request. The cached wait status
5554 will be collected in remote_wait. */
5555 if (rs
->cached_wait_status
)
5558 /* Send interrupt_sequence to remote target. */
5559 send_interrupt_sequence ();
5562 /* Implement the to_stop function for the remote targets. */
5565 remote_stop (struct target_ops
*self
, ptid_t ptid
)
5568 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
5571 remote_stop_ns (ptid
);
5574 /* We don't currently have a way to transparently pause the
5575 remote target in all-stop mode. Interrupt it instead. */
5576 remote_interrupt_as (ptid
);
5580 /* Implement the to_interrupt function for the remote targets. */
5583 remote_interrupt (struct target_ops
*self
, ptid_t ptid
)
5586 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
5590 /* We don't currently have a way to ^C the remote target in
5591 non-stop mode. Stop it (with no signal) instead. */
5592 remote_stop_ns (ptid
);
5595 remote_interrupt_as (ptid
);
5598 /* Ask the user what to do when an interrupt is received. */
5601 interrupt_query (void)
5603 struct remote_state
*rs
= get_remote_state ();
5604 struct cleanup
*old_chain
;
5606 old_chain
= make_cleanup_restore_target_terminal ();
5607 target_terminal_ours ();
5609 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
5611 if (query (_("The target is not responding to interrupt requests.\n"
5612 "Stop debugging it? ")))
5614 remote_unpush_target ();
5615 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
5620 if (query (_("Interrupted while waiting for the program.\n"
5621 "Give up waiting? ")))
5625 do_cleanups (old_chain
);
5628 /* Enable/disable target terminal ownership. Most targets can use
5629 terminal groups to control terminal ownership. Remote targets are
5630 different in that explicit transfer of ownership to/from GDB/target
5634 remote_terminal_inferior (struct target_ops
*self
)
5636 if (!target_async_permitted
)
5637 /* Nothing to do. */
5640 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
5641 idempotent. The event-loop GDB talking to an asynchronous target
5642 with a synchronous command calls this function from both
5643 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
5644 transfer the terminal to the target when it shouldn't this guard
5646 if (!remote_async_terminal_ours_p
)
5648 delete_file_handler (input_fd
);
5649 remote_async_terminal_ours_p
= 0;
5650 async_initialize_sigint_signal_handler ();
5651 /* NOTE: At this point we could also register our selves as the
5652 recipient of all input. Any characters typed could then be
5653 passed on down to the target. */
5657 remote_terminal_ours (struct target_ops
*self
)
5659 if (!target_async_permitted
)
5660 /* Nothing to do. */
5663 /* See FIXME in remote_terminal_inferior. */
5664 if (remote_async_terminal_ours_p
)
5666 async_cleanup_sigint_signal_handler (NULL
);
5667 add_file_handler (input_fd
, stdin_event_handler
, 0);
5668 remote_async_terminal_ours_p
= 1;
5672 remote_console_output (char *msg
)
5676 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
5679 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
5683 fputs_unfiltered (tb
, gdb_stdtarg
);
5685 gdb_flush (gdb_stdtarg
);
5688 typedef struct cached_reg
5691 gdb_byte data
[MAX_REGISTER_SIZE
];
5694 DEF_VEC_O(cached_reg_t
);
5696 typedef struct stop_reply
5698 struct notif_event base
;
5700 /* The identifier of the thread about this event */
5703 /* The remote state this event is associated with. When the remote
5704 connection, represented by a remote_state object, is closed,
5705 all the associated stop_reply events should be released. */
5706 struct remote_state
*rs
;
5708 struct target_waitstatus ws
;
5710 /* Expedited registers. This makes remote debugging a bit more
5711 efficient for those targets that provide critical registers as
5712 part of their normal status mechanism (as another roundtrip to
5713 fetch them is avoided). */
5714 VEC(cached_reg_t
) *regcache
;
5716 enum target_stop_reason stop_reason
;
5718 CORE_ADDR watch_data_address
;
5723 DECLARE_QUEUE_P (stop_reply_p
);
5724 DEFINE_QUEUE_P (stop_reply_p
);
5725 /* The list of already fetched and acknowledged stop events. This
5726 queue is used for notification Stop, and other notifications
5727 don't need queue for their events, because the notification events
5728 of Stop can't be consumed immediately, so that events should be
5729 queued first, and be consumed by remote_wait_{ns,as} one per
5730 time. Other notifications can consume their events immediately,
5731 so queue is not needed for them. */
5732 static QUEUE (stop_reply_p
) *stop_reply_queue
;
5735 stop_reply_xfree (struct stop_reply
*r
)
5737 notif_event_xfree ((struct notif_event
*) r
);
5740 /* Return the length of the stop reply queue. */
5743 stop_reply_queue_length (void)
5745 return QUEUE_length (stop_reply_p
, stop_reply_queue
);
5749 remote_notif_stop_parse (struct notif_client
*self
, char *buf
,
5750 struct notif_event
*event
)
5752 remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
5756 remote_notif_stop_ack (struct notif_client
*self
, char *buf
,
5757 struct notif_event
*event
)
5759 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
5762 putpkt ((char *) self
->ack_command
);
5764 if (stop_reply
->ws
.kind
== TARGET_WAITKIND_IGNORE
)
5765 /* We got an unknown stop reply. */
5766 error (_("Unknown stop reply"));
5768 push_stop_reply (stop_reply
);
5772 remote_notif_stop_can_get_pending_events (struct notif_client
*self
)
5774 /* We can't get pending events in remote_notif_process for
5775 notification stop, and we have to do this in remote_wait_ns
5776 instead. If we fetch all queued events from stub, remote stub
5777 may exit and we have no chance to process them back in
5779 mark_async_event_handler (remote_async_inferior_event_token
);
5784 stop_reply_dtr (struct notif_event
*event
)
5786 struct stop_reply
*r
= (struct stop_reply
*) event
;
5788 VEC_free (cached_reg_t
, r
->regcache
);
5791 static struct notif_event
*
5792 remote_notif_stop_alloc_reply (void)
5794 /* We cast to a pointer to the "base class". */
5795 struct notif_event
*r
= (struct notif_event
*) XNEW (struct stop_reply
);
5797 r
->dtr
= stop_reply_dtr
;
5802 /* A client of notification Stop. */
5804 struct notif_client notif_client_stop
=
5808 remote_notif_stop_parse
,
5809 remote_notif_stop_ack
,
5810 remote_notif_stop_can_get_pending_events
,
5811 remote_notif_stop_alloc_reply
,
5815 /* A parameter to pass data in and out. */
5817 struct queue_iter_param
5820 struct stop_reply
*output
;
5823 /* Determine if THREAD is a pending fork parent thread. ARG contains
5824 the pid of the process that owns the threads we want to check, or
5825 -1 if we want to check all threads. */
5828 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
5831 if (ws
->kind
== TARGET_WAITKIND_FORKED
5832 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
5834 if (event_pid
== -1 || event_pid
== ptid_get_pid (thread_ptid
))
5841 /* Check whether EVENT is a fork event, and if it is, remove the
5842 fork child from the context list passed in DATA. */
5845 remove_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
5846 QUEUE_ITER (stop_reply_p
) *iter
,
5850 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
5851 struct threads_listing_context
*context
5852 = (struct threads_listing_context
*) param
->input
;
5854 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
5855 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
5857 threads_listing_context_remove (&event
->ws
, context
);
5863 /* If CONTEXT contains any fork child threads that have not been
5864 reported yet, remove them from the CONTEXT list. If such a
5865 thread exists it is because we are stopped at a fork catchpoint
5866 and have not yet called follow_fork, which will set up the
5867 host-side data structures for the new process. */
5870 remove_new_fork_children (struct threads_listing_context
*context
)
5872 struct thread_info
* thread
;
5874 struct notif_client
*notif
= ¬if_client_stop
;
5875 struct queue_iter_param param
;
5877 /* For any threads stopped at a fork event, remove the corresponding
5878 fork child threads from the CONTEXT list. */
5879 ALL_NON_EXITED_THREADS (thread
)
5881 struct target_waitstatus
*ws
= &thread
->pending_follow
;
5883 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
5885 threads_listing_context_remove (ws
, context
);
5889 /* Check for any pending fork events (not reported or processed yet)
5890 in process PID and remove those fork child threads from the
5891 CONTEXT list as well. */
5892 remote_notif_get_pending_events (notif
);
5893 param
.input
= context
;
5894 param
.output
= NULL
;
5895 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
5896 remove_child_of_pending_fork
, ¶m
);
5899 /* Remove stop replies in the queue if its pid is equal to the given
5903 remove_stop_reply_for_inferior (QUEUE (stop_reply_p
) *q
,
5904 QUEUE_ITER (stop_reply_p
) *iter
,
5908 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
5909 struct inferior
*inf
= (struct inferior
*) param
->input
;
5911 if (ptid_get_pid (event
->ptid
) == inf
->pid
)
5913 stop_reply_xfree (event
);
5914 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
5920 /* Discard all pending stop replies of inferior INF. */
5923 discard_pending_stop_replies (struct inferior
*inf
)
5926 struct queue_iter_param param
;
5927 struct stop_reply
*reply
;
5928 struct remote_state
*rs
= get_remote_state ();
5929 struct remote_notif_state
*rns
= rs
->notif_state
;
5931 /* This function can be notified when an inferior exists. When the
5932 target is not remote, the notification state is NULL. */
5933 if (rs
->remote_desc
== NULL
)
5936 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
5938 /* Discard the in-flight notification. */
5939 if (reply
!= NULL
&& ptid_get_pid (reply
->ptid
) == inf
->pid
)
5941 stop_reply_xfree (reply
);
5942 rns
->pending_event
[notif_client_stop
.id
] = NULL
;
5946 param
.output
= NULL
;
5947 /* Discard the stop replies we have already pulled with
5949 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
5950 remove_stop_reply_for_inferior
, ¶m
);
5953 /* If its remote state is equal to the given remote state,
5954 remove EVENT from the stop reply queue. */
5957 remove_stop_reply_of_remote_state (QUEUE (stop_reply_p
) *q
,
5958 QUEUE_ITER (stop_reply_p
) *iter
,
5962 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
5963 struct remote_state
*rs
= (struct remote_state
*) param
->input
;
5965 if (event
->rs
== rs
)
5967 stop_reply_xfree (event
);
5968 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
5974 /* Discard the stop replies for RS in stop_reply_queue. */
5977 discard_pending_stop_replies_in_queue (struct remote_state
*rs
)
5979 struct queue_iter_param param
;
5982 param
.output
= NULL
;
5983 /* Discard the stop replies we have already pulled with
5985 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
5986 remove_stop_reply_of_remote_state
, ¶m
);
5989 /* A parameter to pass data in and out. */
5992 remote_notif_remove_once_on_match (QUEUE (stop_reply_p
) *q
,
5993 QUEUE_ITER (stop_reply_p
) *iter
,
5997 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
5998 ptid_t
*ptid
= (ptid_t
*) param
->input
;
6000 if (ptid_match (event
->ptid
, *ptid
))
6002 param
->output
= event
;
6003 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6010 /* Remove the first reply in 'stop_reply_queue' which matches
6013 static struct stop_reply
*
6014 remote_notif_remove_queued_reply (ptid_t ptid
)
6016 struct queue_iter_param param
;
6018 param
.input
= &ptid
;
6019 param
.output
= NULL
;
6021 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6022 remote_notif_remove_once_on_match
, ¶m
);
6024 fprintf_unfiltered (gdb_stdlog
,
6025 "notif: discard queued event: 'Stop' in %s\n",
6026 target_pid_to_str (ptid
));
6028 return param
.output
;
6031 /* Look for a queued stop reply belonging to PTID. If one is found,
6032 remove it from the queue, and return it. Returns NULL if none is
6033 found. If there are still queued events left to process, tell the
6034 event loop to get back to target_wait soon. */
6036 static struct stop_reply
*
6037 queued_stop_reply (ptid_t ptid
)
6039 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
6041 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
6042 /* There's still at least an event left. */
6043 mark_async_event_handler (remote_async_inferior_event_token
);
6048 /* Push a fully parsed stop reply in the stop reply queue. Since we
6049 know that we now have at least one queued event left to pass to the
6050 core side, tell the event loop to get back to target_wait soon. */
6053 push_stop_reply (struct stop_reply
*new_event
)
6055 QUEUE_enque (stop_reply_p
, stop_reply_queue
, new_event
);
6058 fprintf_unfiltered (gdb_stdlog
,
6059 "notif: push 'Stop' %s to queue %d\n",
6060 target_pid_to_str (new_event
->ptid
),
6061 QUEUE_length (stop_reply_p
,
6064 mark_async_event_handler (remote_async_inferior_event_token
);
6068 stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p
) *q
,
6069 QUEUE_ITER (stop_reply_p
) *iter
,
6070 struct stop_reply
*event
,
6073 ptid_t
*ptid
= (ptid_t
*) data
;
6075 return !(ptid_equal (*ptid
, event
->ptid
)
6076 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
);
6079 /* Returns true if we have a stop reply for PTID. */
6082 peek_stop_reply (ptid_t ptid
)
6084 return !QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6085 stop_reply_match_ptid_and_ws
, &ptid
);
6088 /* Skip PACKET until the next semi-colon (or end of string). */
6091 skip_to_semicolon (char *p
)
6093 while (*p
!= '\0' && *p
!= ';')
6098 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
6099 starting with P and ending with PEND matches PREFIX. */
6102 strprefix (const char *p
, const char *pend
, const char *prefix
)
6104 for ( ; p
< pend
; p
++, prefix
++)
6107 return *prefix
== '\0';
6110 /* Parse the stop reply in BUF. Either the function succeeds, and the
6111 result is stored in EVENT, or throws an error. */
6114 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
6116 struct remote_arch_state
*rsa
= get_remote_arch_state ();
6121 event
->ptid
= null_ptid
;
6122 event
->rs
= get_remote_state ();
6123 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
6124 event
->ws
.value
.integer
= 0;
6125 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6126 event
->regcache
= NULL
;
6131 case 'T': /* Status with PC, SP, FP, ... */
6132 /* Expedited reply, containing Signal, {regno, reg} repeat. */
6133 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
6135 n... = register number
6136 r... = register contents
6139 p
= &buf
[3]; /* after Txx */
6145 p1
= strchr (p
, ':');
6147 error (_("Malformed packet(a) (missing colon): %s\n\
6151 error (_("Malformed packet(a) (missing register number): %s\n\
6155 /* Some "registers" are actually extended stop information.
6156 Note if you're adding a new entry here: GDB 7.9 and
6157 earlier assume that all register "numbers" that start
6158 with an hex digit are real register numbers. Make sure
6159 the server only sends such a packet if it knows the
6160 client understands it. */
6162 if (strprefix (p
, p1
, "thread"))
6163 event
->ptid
= read_ptid (++p1
, &p
);
6164 else if (strprefix (p
, p1
, "watch")
6165 || strprefix (p
, p1
, "rwatch")
6166 || strprefix (p
, p1
, "awatch"))
6168 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
6169 p
= unpack_varlen_hex (++p1
, &addr
);
6170 event
->watch_data_address
= (CORE_ADDR
) addr
;
6172 else if (strprefix (p
, p1
, "swbreak"))
6174 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
6176 /* Make sure the stub doesn't forget to indicate support
6178 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
6179 error (_("Unexpected swbreak stop reason"));
6181 /* The value part is documented as "must be empty",
6182 though we ignore it, in case we ever decide to make
6183 use of it in a backward compatible way. */
6184 p
= skip_to_semicolon (p1
+ 1);
6186 else if (strprefix (p
, p1
, "hwbreak"))
6188 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
6190 /* Make sure the stub doesn't forget to indicate support
6192 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
6193 error (_("Unexpected hwbreak stop reason"));
6196 p
= skip_to_semicolon (p1
+ 1);
6198 else if (strprefix (p
, p1
, "library"))
6200 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
6201 p
= skip_to_semicolon (p1
+ 1);
6203 else if (strprefix (p
, p1
, "replaylog"))
6205 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
6206 /* p1 will indicate "begin" or "end", but it makes
6207 no difference for now, so ignore it. */
6208 p
= skip_to_semicolon (p1
+ 1);
6210 else if (strprefix (p
, p1
, "core"))
6214 p
= unpack_varlen_hex (++p1
, &c
);
6217 else if (strprefix (p
, p1
, "fork"))
6219 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6220 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
6222 else if (strprefix (p
, p1
, "vfork"))
6224 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6225 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
6227 else if (strprefix (p
, p1
, "vforkdone"))
6229 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
6230 p
= skip_to_semicolon (p1
+ 1);
6232 else if (strprefix (p
, p1
, "exec"))
6235 char pathname
[PATH_MAX
];
6238 /* Determine the length of the execd pathname. */
6239 p
= unpack_varlen_hex (++p1
, &ignored
);
6240 pathlen
= (p
- p1
) / 2;
6242 /* Save the pathname for event reporting and for
6243 the next run command. */
6244 hex2bin (p1
, (gdb_byte
*) pathname
, pathlen
);
6245 pathname
[pathlen
] = '\0';
6247 /* This is freed during event handling. */
6248 event
->ws
.value
.execd_pathname
= xstrdup (pathname
);
6249 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
6251 /* Skip the registers included in this packet, since
6252 they may be for an architecture different from the
6253 one used by the original program. */
6263 p
= skip_to_semicolon (p1
+ 1);
6268 /* Maybe a real ``P'' register number. */
6269 p_temp
= unpack_varlen_hex (p
, &pnum
);
6270 /* If the first invalid character is the colon, we got a
6271 register number. Otherwise, it's an unknown stop
6275 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
6276 cached_reg_t cached_reg
;
6279 error (_("Remote sent bad register number %s: %s\n\
6281 hex_string (pnum
), p
, buf
);
6283 cached_reg
.num
= reg
->regnum
;
6286 fieldsize
= hex2bin (p
, cached_reg
.data
,
6287 register_size (target_gdbarch (),
6290 if (fieldsize
< register_size (target_gdbarch (),
6292 warning (_("Remote reply is too short: %s"), buf
);
6294 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
6298 /* Not a number. Silently skip unknown optional
6300 p
= skip_to_semicolon (p1
+ 1);
6305 error (_("Remote register badly formatted: %s\nhere: %s"),
6310 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
6314 case 'S': /* Old style status, just signal only. */
6318 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
6319 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
6320 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
6321 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
6323 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
6326 case 'W': /* Target exited. */
6333 /* GDB used to accept only 2 hex chars here. Stubs should
6334 only send more if they detect GDB supports multi-process
6336 p
= unpack_varlen_hex (&buf
[1], &value
);
6340 /* The remote process exited. */
6341 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
6342 event
->ws
.value
.integer
= value
;
6346 /* The remote process exited with a signal. */
6347 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
6348 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
6349 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
6351 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
6354 /* If no process is specified, assume inferior_ptid. */
6355 pid
= ptid_get_pid (inferior_ptid
);
6364 else if (startswith (p
, "process:"))
6368 p
+= sizeof ("process:") - 1;
6369 unpack_varlen_hex (p
, &upid
);
6373 error (_("unknown stop reply packet: %s"), buf
);
6376 error (_("unknown stop reply packet: %s"), buf
);
6377 event
->ptid
= pid_to_ptid (pid
);
6382 if (non_stop
&& ptid_equal (event
->ptid
, null_ptid
))
6383 error (_("No process or thread specified in stop reply: %s"), buf
);
6386 /* When the stub wants to tell GDB about a new notification reply, it
6387 sends a notification (%Stop, for example). Those can come it at
6388 any time, hence, we have to make sure that any pending
6389 putpkt/getpkt sequence we're making is finished, before querying
6390 the stub for more events with the corresponding ack command
6391 (vStopped, for example). E.g., if we started a vStopped sequence
6392 immediately upon receiving the notification, something like this
6400 1.6) <-- (registers reply to step #1.3)
6402 Obviously, the reply in step #1.6 would be unexpected to a vStopped
6405 To solve this, whenever we parse a %Stop notification successfully,
6406 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
6407 doing whatever we were doing:
6413 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
6414 2.5) <-- (registers reply to step #2.3)
6416 Eventualy after step #2.5, we return to the event loop, which
6417 notices there's an event on the
6418 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
6419 associated callback --- the function below. At this point, we're
6420 always safe to start a vStopped sequence. :
6423 2.7) <-- T05 thread:2
6429 remote_notif_get_pending_events (struct notif_client
*nc
)
6431 struct remote_state
*rs
= get_remote_state ();
6433 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
6436 fprintf_unfiltered (gdb_stdlog
,
6437 "notif: process: '%s' ack pending event\n",
6441 nc
->ack (nc
, rs
->buf
, rs
->notif_state
->pending_event
[nc
->id
]);
6442 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
6446 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6447 if (strcmp (rs
->buf
, "OK") == 0)
6450 remote_notif_ack (nc
, rs
->buf
);
6456 fprintf_unfiltered (gdb_stdlog
,
6457 "notif: process: '%s' no pending reply\n",
6462 /* Called when it is decided that STOP_REPLY holds the info of the
6463 event that is to be returned to the core. This function always
6464 destroys STOP_REPLY. */
6467 process_stop_reply (struct stop_reply
*stop_reply
,
6468 struct target_waitstatus
*status
)
6472 *status
= stop_reply
->ws
;
6473 ptid
= stop_reply
->ptid
;
6475 /* If no thread/process was reported by the stub, assume the current
6477 if (ptid_equal (ptid
, null_ptid
))
6478 ptid
= inferior_ptid
;
6480 if (status
->kind
!= TARGET_WAITKIND_EXITED
6481 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
6483 struct remote_state
*rs
= get_remote_state ();
6485 /* Expedited registers. */
6486 if (stop_reply
->regcache
)
6488 struct regcache
*regcache
6489 = get_thread_arch_regcache (ptid
, target_gdbarch ());
6494 VEC_iterate(cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
6496 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
6497 VEC_free (cached_reg_t
, stop_reply
->regcache
);
6500 rs
->stop_reason
= stop_reply
->stop_reason
;
6501 rs
->remote_watch_data_address
= stop_reply
->watch_data_address
;
6503 remote_notice_new_inferior (ptid
, 0);
6504 demand_private_info (ptid
)->core
= stop_reply
->core
;
6507 stop_reply_xfree (stop_reply
);
6511 /* The non-stop mode version of target_wait. */
6514 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
6516 struct remote_state
*rs
= get_remote_state ();
6517 struct stop_reply
*stop_reply
;
6521 /* If in non-stop mode, get out of getpkt even if a
6522 notification is received. */
6524 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
6525 0 /* forever */, &is_notif
);
6528 if (ret
!= -1 && !is_notif
)
6531 case 'E': /* Error of some sort. */
6532 /* We're out of sync with the target now. Did it continue
6533 or not? We can't tell which thread it was in non-stop,
6534 so just ignore this. */
6535 warning (_("Remote failure reply: %s"), rs
->buf
);
6537 case 'O': /* Console output. */
6538 remote_console_output (rs
->buf
+ 1);
6541 warning (_("Invalid remote reply: %s"), rs
->buf
);
6545 /* Acknowledge a pending stop reply that may have arrived in the
6547 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
6548 remote_notif_get_pending_events (¬if_client_stop
);
6550 /* If indeed we noticed a stop reply, we're done. */
6551 stop_reply
= queued_stop_reply (ptid
);
6552 if (stop_reply
!= NULL
)
6553 return process_stop_reply (stop_reply
, status
);
6555 /* Still no event. If we're just polling for an event, then
6556 return to the event loop. */
6557 if (options
& TARGET_WNOHANG
)
6559 status
->kind
= TARGET_WAITKIND_IGNORE
;
6560 return minus_one_ptid
;
6563 /* Otherwise do a blocking wait. */
6564 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
6565 1 /* forever */, &is_notif
);
6569 /* Wait until the remote machine stops, then return, storing status in
6570 STATUS just as `wait' would. */
6573 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
6575 struct remote_state
*rs
= get_remote_state ();
6576 ptid_t event_ptid
= null_ptid
;
6578 struct stop_reply
*stop_reply
;
6582 status
->kind
= TARGET_WAITKIND_IGNORE
;
6583 status
->value
.integer
= 0;
6585 stop_reply
= queued_stop_reply (ptid
);
6586 if (stop_reply
!= NULL
)
6587 return process_stop_reply (stop_reply
, status
);
6589 if (rs
->cached_wait_status
)
6590 /* Use the cached wait status, but only once. */
6591 rs
->cached_wait_status
= 0;
6596 int forever
= ((options
& TARGET_WNOHANG
) == 0
6597 && wait_forever_enabled_p
);
6599 if (!rs
->waiting_for_stop_reply
)
6601 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
6602 return minus_one_ptid
;
6605 if (!target_is_async_p ())
6607 ofunc
= signal (SIGINT
, sync_remote_interrupt
);
6608 /* If the user hit C-c before this packet, or between packets,
6609 pretend that it was hit right here. */
6610 if (check_quit_flag ())
6613 sync_remote_interrupt (SIGINT
);
6617 /* FIXME: cagney/1999-09-27: If we're in async mode we should
6618 _never_ wait for ever -> test on target_is_async_p().
6619 However, before we do that we need to ensure that the caller
6620 knows how to take the target into/out of async mode. */
6621 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
6622 forever
, &is_notif
);
6624 if (!target_is_async_p ())
6625 signal (SIGINT
, ofunc
);
6627 /* GDB gets a notification. Return to core as this event is
6629 if (ret
!= -1 && is_notif
)
6630 return minus_one_ptid
;
6632 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
6633 return minus_one_ptid
;
6638 rs
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6640 /* Assume that the target has acknowledged Ctrl-C unless we receive
6641 an 'F' or 'O' packet. */
6642 if (buf
[0] != 'F' && buf
[0] != 'O')
6643 rs
->ctrlc_pending_p
= 0;
6647 case 'E': /* Error of some sort. */
6648 /* We're out of sync with the target now. Did it continue or
6649 not? Not is more likely, so report a stop. */
6650 rs
->waiting_for_stop_reply
= 0;
6652 warning (_("Remote failure reply: %s"), buf
);
6653 status
->kind
= TARGET_WAITKIND_STOPPED
;
6654 status
->value
.sig
= GDB_SIGNAL_0
;
6656 case 'F': /* File-I/O request. */
6657 remote_fileio_request (buf
, rs
->ctrlc_pending_p
);
6658 rs
->ctrlc_pending_p
= 0;
6660 case 'T': case 'S': case 'X': case 'W':
6662 struct stop_reply
*stop_reply
;
6664 /* There is a stop reply to handle. */
6665 rs
->waiting_for_stop_reply
= 0;
6668 = (struct stop_reply
*) remote_notif_parse (¬if_client_stop
,
6671 event_ptid
= process_stop_reply (stop_reply
, status
);
6674 case 'O': /* Console output. */
6675 remote_console_output (buf
+ 1);
6678 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
6680 /* Zero length reply means that we tried 'S' or 'C' and the
6681 remote system doesn't support it. */
6682 target_terminal_ours_for_output ();
6684 ("Can't send signals to this remote system. %s not sent.\n",
6685 gdb_signal_to_name (rs
->last_sent_signal
));
6686 rs
->last_sent_signal
= GDB_SIGNAL_0
;
6687 target_terminal_inferior ();
6689 strcpy ((char *) buf
, rs
->last_sent_step
? "s" : "c");
6690 putpkt ((char *) buf
);
6693 /* else fallthrough */
6695 warning (_("Invalid remote reply: %s"), buf
);
6699 if (status
->kind
== TARGET_WAITKIND_IGNORE
)
6701 /* Nothing interesting happened. If we're doing a non-blocking
6702 poll, we're done. Otherwise, go back to waiting. */
6703 if (options
& TARGET_WNOHANG
)
6704 return minus_one_ptid
;
6708 else if (status
->kind
!= TARGET_WAITKIND_EXITED
6709 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
6711 if (!ptid_equal (event_ptid
, null_ptid
))
6712 record_currthread (rs
, event_ptid
);
6714 event_ptid
= inferior_ptid
;
6717 /* A process exit. Invalidate our notion of current thread. */
6718 record_currthread (rs
, minus_one_ptid
);
6723 /* Wait until the remote machine stops, then return, storing status in
6724 STATUS just as `wait' would. */
6727 remote_wait (struct target_ops
*ops
,
6728 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
6733 event_ptid
= remote_wait_ns (ptid
, status
, options
);
6735 event_ptid
= remote_wait_as (ptid
, status
, options
);
6737 if (target_is_async_p ())
6739 /* If there are are events left in the queue tell the event loop
6741 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
6742 mark_async_event_handler (remote_async_inferior_event_token
);
6748 /* Fetch a single register using a 'p' packet. */
6751 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
6753 struct remote_state
*rs
= get_remote_state ();
6755 char regp
[MAX_REGISTER_SIZE
];
6758 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
6761 if (reg
->pnum
== -1)
6766 p
+= hexnumstr (p
, reg
->pnum
);
6769 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6773 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
6777 case PACKET_UNKNOWN
:
6780 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
6781 gdbarch_register_name (get_regcache_arch (regcache
),
6786 /* If this register is unfetchable, tell the regcache. */
6789 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
6793 /* Otherwise, parse and supply the value. */
6799 error (_("fetch_register_using_p: early buf termination"));
6801 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
6804 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
6808 /* Fetch the registers included in the target's 'g' packet. */
6811 send_g_packet (void)
6813 struct remote_state
*rs
= get_remote_state ();
6816 xsnprintf (rs
->buf
, get_remote_packet_size (), "g");
6817 remote_send (&rs
->buf
, &rs
->buf_size
);
6819 /* We can get out of synch in various cases. If the first character
6820 in the buffer is not a hex character, assume that has happened
6821 and try to fetch another packet to read. */
6822 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
6823 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
6824 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
6825 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
6828 fprintf_unfiltered (gdb_stdlog
,
6829 "Bad register packet; fetching a new packet\n");
6830 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6833 buf_len
= strlen (rs
->buf
);
6835 /* Sanity check the received packet. */
6836 if (buf_len
% 2 != 0)
6837 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
6843 process_g_packet (struct regcache
*regcache
)
6845 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
6846 struct remote_state
*rs
= get_remote_state ();
6847 struct remote_arch_state
*rsa
= get_remote_arch_state ();
6852 buf_len
= strlen (rs
->buf
);
6854 /* Further sanity checks, with knowledge of the architecture. */
6855 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
6856 error (_("Remote 'g' packet reply is too long: %s"), rs
->buf
);
6858 /* Save the size of the packet sent to us by the target. It is used
6859 as a heuristic when determining the max size of packets that the
6860 target can safely receive. */
6861 if (rsa
->actual_register_packet_size
== 0)
6862 rsa
->actual_register_packet_size
= buf_len
;
6864 /* If this is smaller than we guessed the 'g' packet would be,
6865 update our records. A 'g' reply that doesn't include a register's
6866 value implies either that the register is not available, or that
6867 the 'p' packet must be used. */
6868 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
6870 rsa
->sizeof_g_packet
= buf_len
/ 2;
6872 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
6874 if (rsa
->regs
[i
].pnum
== -1)
6877 if (rsa
->regs
[i
].offset
>= rsa
->sizeof_g_packet
)
6878 rsa
->regs
[i
].in_g_packet
= 0;
6880 rsa
->regs
[i
].in_g_packet
= 1;
6884 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
6886 /* Unimplemented registers read as all bits zero. */
6887 memset (regs
, 0, rsa
->sizeof_g_packet
);
6889 /* Reply describes registers byte by byte, each byte encoded as two
6890 hex characters. Suck them all up, then supply them to the
6891 register cacheing/storage mechanism. */
6894 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
6896 if (p
[0] == 0 || p
[1] == 0)
6897 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
6898 internal_error (__FILE__
, __LINE__
,
6899 _("unexpected end of 'g' packet reply"));
6901 if (p
[0] == 'x' && p
[1] == 'x')
6902 regs
[i
] = 0; /* 'x' */
6904 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
6908 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
6910 struct packet_reg
*r
= &rsa
->regs
[i
];
6914 if (r
->offset
* 2 >= strlen (rs
->buf
))
6915 /* This shouldn't happen - we adjusted in_g_packet above. */
6916 internal_error (__FILE__
, __LINE__
,
6917 _("unexpected end of 'g' packet reply"));
6918 else if (rs
->buf
[r
->offset
* 2] == 'x')
6920 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
6921 /* The register isn't available, mark it as such (at
6922 the same time setting the value to zero). */
6923 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
6926 regcache_raw_supply (regcache
, r
->regnum
,
6933 fetch_registers_using_g (struct regcache
*regcache
)
6936 process_g_packet (regcache
);
6939 /* Make the remote selected traceframe match GDB's selected
6943 set_remote_traceframe (void)
6946 struct remote_state
*rs
= get_remote_state ();
6948 if (rs
->remote_traceframe_number
== get_traceframe_number ())
6951 /* Avoid recursion, remote_trace_find calls us again. */
6952 rs
->remote_traceframe_number
= get_traceframe_number ();
6954 newnum
= target_trace_find (tfind_number
,
6955 get_traceframe_number (), 0, 0, NULL
);
6957 /* Should not happen. If it does, all bets are off. */
6958 if (newnum
!= get_traceframe_number ())
6959 warning (_("could not set remote traceframe"));
6963 remote_fetch_registers (struct target_ops
*ops
,
6964 struct regcache
*regcache
, int regnum
)
6966 struct remote_arch_state
*rsa
= get_remote_arch_state ();
6969 set_remote_traceframe ();
6970 set_general_thread (inferior_ptid
);
6974 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
6976 gdb_assert (reg
!= NULL
);
6978 /* If this register might be in the 'g' packet, try that first -
6979 we are likely to read more than one register. If this is the
6980 first 'g' packet, we might be overly optimistic about its
6981 contents, so fall back to 'p'. */
6982 if (reg
->in_g_packet
)
6984 fetch_registers_using_g (regcache
);
6985 if (reg
->in_g_packet
)
6989 if (fetch_register_using_p (regcache
, reg
))
6992 /* This register is not available. */
6993 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
6998 fetch_registers_using_g (regcache
);
7000 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
7001 if (!rsa
->regs
[i
].in_g_packet
)
7002 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
7004 /* This register is not available. */
7005 regcache_raw_supply (regcache
, i
, NULL
);
7009 /* Prepare to store registers. Since we may send them all (using a
7010 'G' request), we have to read out the ones we don't want to change
7014 remote_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
7016 struct remote_arch_state
*rsa
= get_remote_arch_state ();
7018 gdb_byte buf
[MAX_REGISTER_SIZE
];
7020 /* Make sure the entire registers array is valid. */
7021 switch (packet_support (PACKET_P
))
7023 case PACKET_DISABLE
:
7024 case PACKET_SUPPORT_UNKNOWN
:
7025 /* Make sure all the necessary registers are cached. */
7026 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
7027 if (rsa
->regs
[i
].in_g_packet
)
7028 regcache_raw_read (regcache
, rsa
->regs
[i
].regnum
, buf
);
7035 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
7036 packet was not recognized. */
7039 store_register_using_P (const struct regcache
*regcache
,
7040 struct packet_reg
*reg
)
7042 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
7043 struct remote_state
*rs
= get_remote_state ();
7044 /* Try storing a single register. */
7045 char *buf
= rs
->buf
;
7046 gdb_byte regp
[MAX_REGISTER_SIZE
];
7049 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
7052 if (reg
->pnum
== -1)
7055 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
7056 p
= buf
+ strlen (buf
);
7057 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
7058 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
7060 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7062 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
7067 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
7068 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
7069 case PACKET_UNKNOWN
:
7072 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
7076 /* Store register REGNUM, or all registers if REGNUM == -1, from the
7077 contents of the register cache buffer. FIXME: ignores errors. */
7080 store_registers_using_G (const struct regcache
*regcache
)
7082 struct remote_state
*rs
= get_remote_state ();
7083 struct remote_arch_state
*rsa
= get_remote_arch_state ();
7087 /* Extract all the registers in the regcache copying them into a
7092 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
7093 memset (regs
, 0, rsa
->sizeof_g_packet
);
7094 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
7096 struct packet_reg
*r
= &rsa
->regs
[i
];
7099 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
7103 /* Command describes registers byte by byte,
7104 each byte encoded as two hex characters. */
7107 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
7109 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
7111 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7112 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
7113 error (_("Could not write registers; remote failure reply '%s'"),
7117 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
7118 of the register cache buffer. FIXME: ignores errors. */
7121 remote_store_registers (struct target_ops
*ops
,
7122 struct regcache
*regcache
, int regnum
)
7124 struct remote_arch_state
*rsa
= get_remote_arch_state ();
7127 set_remote_traceframe ();
7128 set_general_thread (inferior_ptid
);
7132 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
7134 gdb_assert (reg
!= NULL
);
7136 /* Always prefer to store registers using the 'P' packet if
7137 possible; we often change only a small number of registers.
7138 Sometimes we change a larger number; we'd need help from a
7139 higher layer to know to use 'G'. */
7140 if (store_register_using_P (regcache
, reg
))
7143 /* For now, don't complain if we have no way to write the
7144 register. GDB loses track of unavailable registers too
7145 easily. Some day, this may be an error. We don't have
7146 any way to read the register, either... */
7147 if (!reg
->in_g_packet
)
7150 store_registers_using_G (regcache
);
7154 store_registers_using_G (regcache
);
7156 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
7157 if (!rsa
->regs
[i
].in_g_packet
)
7158 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
7159 /* See above for why we do not issue an error here. */
7164 /* Return the number of hex digits in num. */
7167 hexnumlen (ULONGEST num
)
7171 for (i
= 0; num
!= 0; i
++)
7177 /* Set BUF to the minimum number of hex digits representing NUM. */
7180 hexnumstr (char *buf
, ULONGEST num
)
7182 int len
= hexnumlen (num
);
7184 return hexnumnstr (buf
, num
, len
);
7188 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
7191 hexnumnstr (char *buf
, ULONGEST num
, int width
)
7197 for (i
= width
- 1; i
>= 0; i
--)
7199 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
7206 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
7209 remote_address_masked (CORE_ADDR addr
)
7211 unsigned int address_size
= remote_address_size
;
7213 /* If "remoteaddresssize" was not set, default to target address size. */
7215 address_size
= gdbarch_addr_bit (target_gdbarch ());
7217 if (address_size
> 0
7218 && address_size
< (sizeof (ULONGEST
) * 8))
7220 /* Only create a mask when that mask can safely be constructed
7221 in a ULONGEST variable. */
7224 mask
= (mask
<< address_size
) - 1;
7230 /* Determine whether the remote target supports binary downloading.
7231 This is accomplished by sending a no-op memory write of zero length
7232 to the target at the specified address. It does not suffice to send
7233 the whole packet, since many stubs strip the eighth bit and
7234 subsequently compute a wrong checksum, which causes real havoc with
7237 NOTE: This can still lose if the serial line is not eight-bit
7238 clean. In cases like this, the user should clear "remote
7242 check_binary_download (CORE_ADDR addr
)
7244 struct remote_state
*rs
= get_remote_state ();
7246 switch (packet_support (PACKET_X
))
7248 case PACKET_DISABLE
:
7252 case PACKET_SUPPORT_UNKNOWN
:
7258 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7260 p
+= hexnumstr (p
, (ULONGEST
) 0);
7264 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
7265 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7267 if (rs
->buf
[0] == '\0')
7270 fprintf_unfiltered (gdb_stdlog
,
7271 "binary downloading NOT "
7272 "supported by target\n");
7273 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
7278 fprintf_unfiltered (gdb_stdlog
,
7279 "binary downloading supported by target\n");
7280 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
7287 /* Helper function to resize the payload in order to try to get a good
7288 alignment. We try to write an amount of data such that the next write will
7289 start on an address aligned on REMOTE_ALIGN_WRITES. */
7292 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
7294 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
7297 /* Write memory data directly to the remote machine.
7298 This does not inform the data cache; the data cache uses this.
7299 HEADER is the starting part of the packet.
7300 MEMADDR is the address in the remote memory space.
7301 MYADDR is the address of the buffer in our space.
7302 LEN_UNITS is the number of addressable units to write.
7303 UNIT_SIZE is the length in bytes of an addressable unit.
7304 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
7305 should send data as binary ('X'), or hex-encoded ('M').
7307 The function creates packet of the form
7308 <HEADER><ADDRESS>,<LENGTH>:<DATA>
7310 where encoding of <DATA> is terminated by PACKET_FORMAT.
7312 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
7315 Return the transferred status, error or OK (an
7316 'enum target_xfer_status' value). Save the number of addressable units
7317 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
7319 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
7320 exchange between gdb and the stub could look like (?? in place of the
7326 -> $M1000,3:eeeeffffeeee#??
7330 <- eeeeffffeeeedddd */
7332 static enum target_xfer_status
7333 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
7334 const gdb_byte
*myaddr
, ULONGEST len_units
,
7335 int unit_size
, ULONGEST
*xfered_len_units
,
7336 char packet_format
, int use_length
)
7338 struct remote_state
*rs
= get_remote_state ();
7344 int payload_capacity_bytes
;
7345 int payload_length_bytes
;
7347 if (packet_format
!= 'X' && packet_format
!= 'M')
7348 internal_error (__FILE__
, __LINE__
,
7349 _("remote_write_bytes_aux: bad packet format"));
7352 return TARGET_XFER_EOF
;
7354 payload_capacity_bytes
= get_memory_write_packet_size ();
7356 /* The packet buffer will be large enough for the payload;
7357 get_memory_packet_size ensures this. */
7360 /* Compute the size of the actual payload by subtracting out the
7361 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
7363 payload_capacity_bytes
-= strlen ("$,:#NN");
7365 /* The comma won't be used. */
7366 payload_capacity_bytes
+= 1;
7367 payload_capacity_bytes
-= strlen (header
);
7368 payload_capacity_bytes
-= hexnumlen (memaddr
);
7370 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
7372 strcat (rs
->buf
, header
);
7373 p
= rs
->buf
+ strlen (header
);
7375 /* Compute a best guess of the number of bytes actually transfered. */
7376 if (packet_format
== 'X')
7378 /* Best guess at number of bytes that will fit. */
7379 todo_units
= min (len_units
, payload_capacity_bytes
/ unit_size
);
7381 payload_capacity_bytes
-= hexnumlen (todo_units
);
7382 todo_units
= min (todo_units
, payload_capacity_bytes
/ unit_size
);
7386 /* Number of bytes that will fit. */
7387 todo_units
= min (len_units
, (payload_capacity_bytes
/ unit_size
) / 2);
7389 payload_capacity_bytes
-= hexnumlen (todo_units
);
7390 todo_units
= min (todo_units
, (payload_capacity_bytes
/ unit_size
) / 2);
7393 if (todo_units
<= 0)
7394 internal_error (__FILE__
, __LINE__
,
7395 _("minimum packet size too small to write data"));
7397 /* If we already need another packet, then try to align the end
7398 of this packet to a useful boundary. */
7399 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
7400 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
7402 /* Append "<memaddr>". */
7403 memaddr
= remote_address_masked (memaddr
);
7404 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
7411 /* Append the length and retain its location and size. It may need to be
7412 adjusted once the packet body has been created. */
7414 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
7422 /* Append the packet body. */
7423 if (packet_format
== 'X')
7425 /* Binary mode. Send target system values byte by byte, in
7426 increasing byte addresses. Only escape certain critical
7428 payload_length_bytes
=
7429 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
7430 &units_written
, payload_capacity_bytes
);
7432 /* If not all TODO units fit, then we'll need another packet. Make
7433 a second try to keep the end of the packet aligned. Don't do
7434 this if the packet is tiny. */
7435 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
7439 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
7441 if (new_todo_units
!= units_written
)
7442 payload_length_bytes
=
7443 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
7444 (gdb_byte
*) p
, &units_written
,
7445 payload_capacity_bytes
);
7448 p
+= payload_length_bytes
;
7449 if (use_length
&& units_written
< todo_units
)
7451 /* Escape chars have filled up the buffer prematurely,
7452 and we have actually sent fewer units than planned.
7453 Fix-up the length field of the packet. Use the same
7454 number of characters as before. */
7455 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
7457 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
7462 /* Normal mode: Send target system values byte by byte, in
7463 increasing byte addresses. Each byte is encoded as a two hex
7465 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
7466 units_written
= todo_units
;
7469 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
7470 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7472 if (rs
->buf
[0] == 'E')
7473 return TARGET_XFER_E_IO
;
7475 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
7476 send fewer units than we'd planned. */
7477 *xfered_len_units
= (ULONGEST
) units_written
;
7478 return TARGET_XFER_OK
;
7481 /* Write memory data directly to the remote machine.
7482 This does not inform the data cache; the data cache uses this.
7483 MEMADDR is the address in the remote memory space.
7484 MYADDR is the address of the buffer in our space.
7485 LEN is the number of bytes.
7487 Return the transferred status, error or OK (an
7488 'enum target_xfer_status' value). Save the number of bytes
7489 transferred in *XFERED_LEN. Only transfer a single packet. */
7491 static enum target_xfer_status
7492 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ULONGEST len
,
7493 int unit_size
, ULONGEST
*xfered_len
)
7495 char *packet_format
= 0;
7497 /* Check whether the target supports binary download. */
7498 check_binary_download (memaddr
);
7500 switch (packet_support (PACKET_X
))
7503 packet_format
= "X";
7505 case PACKET_DISABLE
:
7506 packet_format
= "M";
7508 case PACKET_SUPPORT_UNKNOWN
:
7509 internal_error (__FILE__
, __LINE__
,
7510 _("remote_write_bytes: bad internal state"));
7512 internal_error (__FILE__
, __LINE__
, _("bad switch"));
7515 return remote_write_bytes_aux (packet_format
,
7516 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
7517 packet_format
[0], 1);
7520 /* Read memory data directly from the remote machine.
7521 This does not use the data cache; the data cache uses this.
7522 MEMADDR is the address in the remote memory space.
7523 MYADDR is the address of the buffer in our space.
7524 LEN_UNITS is the number of addressable memory units to read..
7525 UNIT_SIZE is the length in bytes of an addressable unit.
7527 Return the transferred status, error or OK (an
7528 'enum target_xfer_status' value). Save the number of bytes
7529 transferred in *XFERED_LEN_UNITS.
7531 See the comment of remote_write_bytes_aux for an example of
7532 memory read/write exchange between gdb and the stub. */
7534 static enum target_xfer_status
7535 remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ULONGEST len_units
,
7536 int unit_size
, ULONGEST
*xfered_len_units
)
7538 struct remote_state
*rs
= get_remote_state ();
7539 int buf_size_bytes
; /* Max size of packet output buffer. */
7544 buf_size_bytes
= get_memory_read_packet_size ();
7545 /* The packet buffer will be large enough for the payload;
7546 get_memory_packet_size ensures this. */
7548 /* Number of units that will fit. */
7549 todo_units
= min (len_units
, (buf_size_bytes
/ unit_size
) / 2);
7551 /* Construct "m"<memaddr>","<len>". */
7552 memaddr
= remote_address_masked (memaddr
);
7555 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
7557 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
7560 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7561 if (rs
->buf
[0] == 'E'
7562 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
7563 && rs
->buf
[3] == '\0')
7564 return TARGET_XFER_E_IO
;
7565 /* Reply describes memory byte by byte, each byte encoded as two hex
7568 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
7569 /* Return what we have. Let higher layers handle partial reads. */
7570 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
7571 return TARGET_XFER_OK
;
7574 /* Using the set of read-only target sections of remote, read live
7577 For interface/parameters/return description see target.h,
7580 static enum target_xfer_status
7581 remote_xfer_live_readonly_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
7582 ULONGEST memaddr
, ULONGEST len
,
7583 int unit_size
, ULONGEST
*xfered_len
)
7585 struct target_section
*secp
;
7586 struct target_section_table
*table
;
7588 secp
= target_section_by_addr (ops
, memaddr
);
7590 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
7591 secp
->the_bfd_section
)
7594 struct target_section
*p
;
7595 ULONGEST memend
= memaddr
+ len
;
7597 table
= target_get_section_table (ops
);
7599 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
7601 if (memaddr
>= p
->addr
)
7603 if (memend
<= p
->endaddr
)
7605 /* Entire transfer is within this section. */
7606 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
7609 else if (memaddr
>= p
->endaddr
)
7611 /* This section ends before the transfer starts. */
7616 /* This section overlaps the transfer. Just do half. */
7617 len
= p
->endaddr
- memaddr
;
7618 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
7625 return TARGET_XFER_EOF
;
7628 /* Similar to remote_read_bytes_1, but it reads from the remote stub
7629 first if the requested memory is unavailable in traceframe.
7630 Otherwise, fall back to remote_read_bytes_1. */
7632 static enum target_xfer_status
7633 remote_read_bytes (struct target_ops
*ops
, CORE_ADDR memaddr
,
7634 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
7635 ULONGEST
*xfered_len
)
7638 return TARGET_XFER_EOF
;
7640 if (get_traceframe_number () != -1)
7642 VEC(mem_range_s
) *available
;
7644 /* If we fail to get the set of available memory, then the
7645 target does not support querying traceframe info, and so we
7646 attempt reading from the traceframe anyway (assuming the
7647 target implements the old QTro packet then). */
7648 if (traceframe_available_memory (&available
, memaddr
, len
))
7650 struct cleanup
*old_chain
;
7652 old_chain
= make_cleanup (VEC_cleanup(mem_range_s
), &available
);
7654 if (VEC_empty (mem_range_s
, available
)
7655 || VEC_index (mem_range_s
, available
, 0)->start
!= memaddr
)
7657 enum target_xfer_status res
;
7659 /* Don't read into the traceframe's available
7661 if (!VEC_empty (mem_range_s
, available
))
7663 LONGEST oldlen
= len
;
7665 len
= VEC_index (mem_range_s
, available
, 0)->start
- memaddr
;
7666 gdb_assert (len
<= oldlen
);
7669 do_cleanups (old_chain
);
7671 /* This goes through the topmost target again. */
7672 res
= remote_xfer_live_readonly_partial (ops
, myaddr
, memaddr
,
7673 len
, unit_size
, xfered_len
);
7674 if (res
== TARGET_XFER_OK
)
7675 return TARGET_XFER_OK
;
7678 /* No use trying further, we know some memory starting
7679 at MEMADDR isn't available. */
7681 return TARGET_XFER_UNAVAILABLE
;
7685 /* Don't try to read more than how much is available, in
7686 case the target implements the deprecated QTro packet to
7687 cater for older GDBs (the target's knowledge of read-only
7688 sections may be outdated by now). */
7689 len
= VEC_index (mem_range_s
, available
, 0)->length
;
7691 do_cleanups (old_chain
);
7695 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
7700 /* Sends a packet with content determined by the printf format string
7701 FORMAT and the remaining arguments, then gets the reply. Returns
7702 whether the packet was a success, a failure, or unknown. */
7704 static enum packet_result
remote_send_printf (const char *format
, ...)
7705 ATTRIBUTE_PRINTF (1, 2);
7707 static enum packet_result
7708 remote_send_printf (const char *format
, ...)
7710 struct remote_state
*rs
= get_remote_state ();
7711 int max_size
= get_remote_packet_size ();
7714 va_start (ap
, format
);
7717 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
7718 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
7720 if (putpkt (rs
->buf
) < 0)
7721 error (_("Communication problem with target."));
7724 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7726 return packet_check_result (rs
->buf
);
7730 restore_remote_timeout (void *p
)
7732 int value
= *(int *)p
;
7734 remote_timeout
= value
;
7737 /* Flash writing can take quite some time. We'll set
7738 effectively infinite timeout for flash operations.
7739 In future, we'll need to decide on a better approach. */
7740 static const int remote_flash_timeout
= 1000;
7743 remote_flash_erase (struct target_ops
*ops
,
7744 ULONGEST address
, LONGEST length
)
7746 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
7747 int saved_remote_timeout
= remote_timeout
;
7748 enum packet_result ret
;
7749 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
7750 &saved_remote_timeout
);
7752 remote_timeout
= remote_flash_timeout
;
7754 ret
= remote_send_printf ("vFlashErase:%s,%s",
7755 phex (address
, addr_size
),
7759 case PACKET_UNKNOWN
:
7760 error (_("Remote target does not support flash erase"));
7762 error (_("Error erasing flash with vFlashErase packet"));
7767 do_cleanups (back_to
);
7770 static enum target_xfer_status
7771 remote_flash_write (struct target_ops
*ops
, ULONGEST address
,
7772 ULONGEST length
, ULONGEST
*xfered_len
,
7773 const gdb_byte
*data
)
7775 int saved_remote_timeout
= remote_timeout
;
7776 enum target_xfer_status ret
;
7777 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
7778 &saved_remote_timeout
);
7780 remote_timeout
= remote_flash_timeout
;
7781 ret
= remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
7783 do_cleanups (back_to
);
7789 remote_flash_done (struct target_ops
*ops
)
7791 int saved_remote_timeout
= remote_timeout
;
7793 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
7794 &saved_remote_timeout
);
7796 remote_timeout
= remote_flash_timeout
;
7797 ret
= remote_send_printf ("vFlashDone");
7798 do_cleanups (back_to
);
7802 case PACKET_UNKNOWN
:
7803 error (_("Remote target does not support vFlashDone"));
7805 error (_("Error finishing flash operation"));
7812 remote_files_info (struct target_ops
*ignore
)
7814 puts_filtered ("Debugging a target over a serial line.\n");
7817 /* Stuff for dealing with the packets which are part of this protocol.
7818 See comment at top of file for details. */
7820 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
7821 error to higher layers. Called when a serial error is detected.
7822 The exception message is STRING, followed by a colon and a blank,
7823 the system error message for errno at function entry and final dot
7824 for output compatibility with throw_perror_with_name. */
7827 unpush_and_perror (const char *string
)
7829 int saved_errno
= errno
;
7831 remote_unpush_target ();
7832 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
7833 safe_strerror (saved_errno
));
7836 /* Read a single character from the remote end. */
7839 readchar (int timeout
)
7842 struct remote_state
*rs
= get_remote_state ();
7844 ch
= serial_readchar (rs
->remote_desc
, timeout
);
7849 switch ((enum serial_rc
) ch
)
7852 remote_unpush_target ();
7853 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
7856 unpush_and_perror (_("Remote communication error. "
7857 "Target disconnected."));
7859 case SERIAL_TIMEOUT
:
7865 /* Wrapper for serial_write that closes the target and throws if
7869 remote_serial_write (const char *str
, int len
)
7871 struct remote_state
*rs
= get_remote_state ();
7873 if (serial_write (rs
->remote_desc
, str
, len
))
7875 unpush_and_perror (_("Remote communication error. "
7876 "Target disconnected."));
7880 /* Send the command in *BUF to the remote machine, and read the reply
7881 into *BUF. Report an error if we get an error reply. Resize
7882 *BUF using xrealloc if necessary to hold the result, and update
7886 remote_send (char **buf
,
7890 getpkt (buf
, sizeof_buf
, 0);
7892 if ((*buf
)[0] == 'E')
7893 error (_("Remote failure reply: %s"), *buf
);
7896 /* Return a pointer to an xmalloc'ed string representing an escaped
7897 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
7898 etc. The caller is responsible for releasing the returned
7902 escape_buffer (const char *buf
, int n
)
7904 struct cleanup
*old_chain
;
7905 struct ui_file
*stb
;
7908 stb
= mem_fileopen ();
7909 old_chain
= make_cleanup_ui_file_delete (stb
);
7911 fputstrn_unfiltered (buf
, n
, '\\', stb
);
7912 str
= ui_file_xstrdup (stb
, NULL
);
7913 do_cleanups (old_chain
);
7917 /* Display a null-terminated packet on stdout, for debugging, using C
7921 print_packet (const char *buf
)
7923 puts_filtered ("\"");
7924 fputstr_filtered (buf
, '"', gdb_stdout
);
7925 puts_filtered ("\"");
7929 putpkt (const char *buf
)
7931 return putpkt_binary (buf
, strlen (buf
));
7934 /* Send a packet to the remote machine, with error checking. The data
7935 of the packet is in BUF. The string in BUF can be at most
7936 get_remote_packet_size () - 5 to account for the $, # and checksum,
7937 and for a possible /0 if we are debugging (remote_debug) and want
7938 to print the sent packet as a string. */
7941 putpkt_binary (const char *buf
, int cnt
)
7943 struct remote_state
*rs
= get_remote_state ();
7945 unsigned char csum
= 0;
7946 char *buf2
= (char *) xmalloc (cnt
+ 6);
7947 struct cleanup
*old_chain
= make_cleanup (xfree
, buf2
);
7954 /* Catch cases like trying to read memory or listing threads while
7955 we're waiting for a stop reply. The remote server wouldn't be
7956 ready to handle this request, so we'd hang and timeout. We don't
7957 have to worry about this in synchronous mode, because in that
7958 case it's not possible to issue a command while the target is
7959 running. This is not a problem in non-stop mode, because in that
7960 case, the stub is always ready to process serial input. */
7961 if (!non_stop
&& target_is_async_p () && rs
->waiting_for_stop_reply
)
7963 error (_("Cannot execute this command while the target is running.\n"
7964 "Use the \"interrupt\" command to stop the target\n"
7965 "and then try again."));
7968 /* We're sending out a new packet. Make sure we don't look at a
7969 stale cached response. */
7970 rs
->cached_wait_status
= 0;
7972 /* Copy the packet into buffer BUF2, encapsulating it
7973 and giving it a checksum. */
7978 for (i
= 0; i
< cnt
; i
++)
7984 *p
++ = tohex ((csum
>> 4) & 0xf);
7985 *p
++ = tohex (csum
& 0xf);
7987 /* Send it over and over until we get a positive ack. */
7991 int started_error_output
= 0;
7995 struct cleanup
*old_chain
;
7999 str
= escape_buffer (buf2
, p
- buf2
);
8000 old_chain
= make_cleanup (xfree
, str
);
8001 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s...", str
);
8002 gdb_flush (gdb_stdlog
);
8003 do_cleanups (old_chain
);
8005 remote_serial_write (buf2
, p
- buf2
);
8007 /* If this is a no acks version of the remote protocol, send the
8008 packet and move on. */
8012 /* Read until either a timeout occurs (-2) or '+' is read.
8013 Handle any notification that arrives in the mean time. */
8016 ch
= readchar (remote_timeout
);
8024 case SERIAL_TIMEOUT
:
8027 if (started_error_output
)
8029 putchar_unfiltered ('\n');
8030 started_error_output
= 0;
8039 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
8040 do_cleanups (old_chain
);
8044 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
8046 case SERIAL_TIMEOUT
:
8050 do_cleanups (old_chain
);
8053 break; /* Retransmit buffer. */
8057 fprintf_unfiltered (gdb_stdlog
,
8058 "Packet instead of Ack, ignoring it\n");
8059 /* It's probably an old response sent because an ACK
8060 was lost. Gobble up the packet and ack it so it
8061 doesn't get retransmitted when we resend this
8064 remote_serial_write ("+", 1);
8065 continue; /* Now, go look for +. */
8072 /* If we got a notification, handle it, and go back to looking
8074 /* We've found the start of a notification. Now
8075 collect the data. */
8076 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
8081 struct cleanup
*old_chain
;
8084 str
= escape_buffer (rs
->buf
, val
);
8085 old_chain
= make_cleanup (xfree
, str
);
8086 fprintf_unfiltered (gdb_stdlog
,
8087 " Notification received: %s\n",
8089 do_cleanups (old_chain
);
8091 handle_notification (rs
->notif_state
, rs
->buf
);
8092 /* We're in sync now, rewait for the ack. */
8099 if (!started_error_output
)
8101 started_error_output
= 1;
8102 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8104 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8105 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
8114 if (!started_error_output
)
8116 started_error_output
= 1;
8117 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8119 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8123 break; /* Here to retransmit. */
8127 /* This is wrong. If doing a long backtrace, the user should be
8128 able to get out next time we call QUIT, without anything as
8129 violent as interrupt_query. If we want to provide a way out of
8130 here without getting to the next QUIT, it should be based on
8131 hitting ^C twice as in remote_wait. */
8140 do_cleanups (old_chain
);
8144 /* Come here after finding the start of a frame when we expected an
8145 ack. Do our best to discard the rest of this packet. */
8154 c
= readchar (remote_timeout
);
8157 case SERIAL_TIMEOUT
:
8158 /* Nothing we can do. */
8161 /* Discard the two bytes of checksum and stop. */
8162 c
= readchar (remote_timeout
);
8164 c
= readchar (remote_timeout
);
8167 case '*': /* Run length encoding. */
8168 /* Discard the repeat count. */
8169 c
= readchar (remote_timeout
);
8174 /* A regular character. */
8180 /* Come here after finding the start of the frame. Collect the rest
8181 into *BUF, verifying the checksum, length, and handling run-length
8182 compression. NUL terminate the buffer. If there is not enough room,
8183 expand *BUF using xrealloc.
8185 Returns -1 on error, number of characters in buffer (ignoring the
8186 trailing NULL) on success. (could be extended to return one of the
8187 SERIAL status indications). */
8190 read_frame (char **buf_p
,
8197 struct remote_state
*rs
= get_remote_state ();
8204 c
= readchar (remote_timeout
);
8207 case SERIAL_TIMEOUT
:
8209 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
8213 fputs_filtered ("Saw new packet start in middle of old one\n",
8215 return -1; /* Start a new packet, count retries. */
8218 unsigned char pktcsum
;
8224 check_0
= readchar (remote_timeout
);
8226 check_1
= readchar (remote_timeout
);
8228 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
8231 fputs_filtered ("Timeout in checksum, retrying\n",
8235 else if (check_0
< 0 || check_1
< 0)
8238 fputs_filtered ("Communication error in checksum\n",
8243 /* Don't recompute the checksum; with no ack packets we
8244 don't have any way to indicate a packet retransmission
8249 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
8250 if (csum
== pktcsum
)
8255 struct cleanup
*old_chain
;
8258 str
= escape_buffer (buf
, bc
);
8259 old_chain
= make_cleanup (xfree
, str
);
8260 fprintf_unfiltered (gdb_stdlog
,
8261 "Bad checksum, sentsum=0x%x, "
8262 "csum=0x%x, buf=%s\n",
8263 pktcsum
, csum
, str
);
8264 do_cleanups (old_chain
);
8266 /* Number of characters in buffer ignoring trailing
8270 case '*': /* Run length encoding. */
8275 c
= readchar (remote_timeout
);
8277 repeat
= c
- ' ' + 3; /* Compute repeat count. */
8279 /* The character before ``*'' is repeated. */
8281 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
8283 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
8285 /* Make some more room in the buffer. */
8286 *sizeof_buf
+= repeat
;
8287 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
8291 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
8297 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
8301 if (bc
>= *sizeof_buf
- 1)
8303 /* Make some more room in the buffer. */
8305 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
8316 /* Read a packet from the remote machine, with error checking, and
8317 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
8318 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
8319 rather than timing out; this is used (in synchronous mode) to wait
8320 for a target that is is executing user code to stop. */
8321 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
8322 don't have to change all the calls to getpkt to deal with the
8323 return value, because at the moment I don't know what the right
8324 thing to do it for those. */
8332 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
8336 /* Read a packet from the remote machine, with error checking, and
8337 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
8338 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
8339 rather than timing out; this is used (in synchronous mode) to wait
8340 for a target that is is executing user code to stop. If FOREVER ==
8341 0, this function is allowed to time out gracefully and return an
8342 indication of this to the caller. Otherwise return the number of
8343 bytes read. If EXPECTING_NOTIF, consider receiving a notification
8344 enough reason to return to the caller. *IS_NOTIF is an output
8345 boolean that indicates whether *BUF holds a notification or not
8346 (a regular packet). */
8349 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
8350 int expecting_notif
, int *is_notif
)
8352 struct remote_state
*rs
= get_remote_state ();
8358 /* We're reading a new response. Make sure we don't look at a
8359 previously cached response. */
8360 rs
->cached_wait_status
= 0;
8362 strcpy (*buf
, "timeout");
8365 timeout
= watchdog
> 0 ? watchdog
: -1;
8366 else if (expecting_notif
)
8367 timeout
= 0; /* There should already be a char in the buffer. If
8370 timeout
= remote_timeout
;
8374 /* Process any number of notifications, and then return when
8378 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
8380 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
8382 /* This can loop forever if the remote side sends us
8383 characters continuously, but if it pauses, we'll get
8384 SERIAL_TIMEOUT from readchar because of timeout. Then
8385 we'll count that as a retry.
8387 Note that even when forever is set, we will only wait
8388 forever prior to the start of a packet. After that, we
8389 expect characters to arrive at a brisk pace. They should
8390 show up within remote_timeout intervals. */
8392 c
= readchar (timeout
);
8393 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
8395 if (c
== SERIAL_TIMEOUT
)
8397 if (expecting_notif
)
8398 return -1; /* Don't complain, it's normal to not get
8399 anything in this case. */
8401 if (forever
) /* Watchdog went off? Kill the target. */
8404 remote_unpush_target ();
8405 throw_error (TARGET_CLOSE_ERROR
,
8406 _("Watchdog timeout has expired. "
8407 "Target detached."));
8410 fputs_filtered ("Timed out.\n", gdb_stdlog
);
8414 /* We've found the start of a packet or notification.
8415 Now collect the data. */
8416 val
= read_frame (buf
, sizeof_buf
);
8421 remote_serial_write ("-", 1);
8424 if (tries
> MAX_TRIES
)
8426 /* We have tried hard enough, and just can't receive the
8427 packet/notification. Give up. */
8428 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
8430 /* Skip the ack char if we're in no-ack mode. */
8431 if (!rs
->noack_mode
)
8432 remote_serial_write ("+", 1);
8436 /* If we got an ordinary packet, return that to our caller. */
8441 struct cleanup
*old_chain
;
8444 str
= escape_buffer (*buf
, val
);
8445 old_chain
= make_cleanup (xfree
, str
);
8446 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s\n", str
);
8447 do_cleanups (old_chain
);
8450 /* Skip the ack char if we're in no-ack mode. */
8451 if (!rs
->noack_mode
)
8452 remote_serial_write ("+", 1);
8453 if (is_notif
!= NULL
)
8458 /* If we got a notification, handle it, and go back to looking
8462 gdb_assert (c
== '%');
8466 struct cleanup
*old_chain
;
8469 str
= escape_buffer (*buf
, val
);
8470 old_chain
= make_cleanup (xfree
, str
);
8471 fprintf_unfiltered (gdb_stdlog
,
8472 " Notification received: %s\n",
8474 do_cleanups (old_chain
);
8476 if (is_notif
!= NULL
)
8479 handle_notification (rs
->notif_state
, *buf
);
8481 /* Notifications require no acknowledgement. */
8483 if (expecting_notif
)
8490 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
8492 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0, NULL
);
8496 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
,
8499 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1,
8503 /* Check whether EVENT is a fork event for the process specified
8504 by the pid passed in DATA, and if it is, kill the fork child. */
8507 kill_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
8508 QUEUE_ITER (stop_reply_p
) *iter
,
8512 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
8513 int parent_pid
= *(int *) param
->input
;
8515 if (is_pending_fork_parent (&event
->ws
, parent_pid
, event
->ptid
))
8517 struct remote_state
*rs
= get_remote_state ();
8518 int child_pid
= ptid_get_pid (event
->ws
.value
.related_pid
);
8521 res
= remote_vkill (child_pid
, rs
);
8523 error (_("Can't kill fork child process %d"), child_pid
);
8529 /* Kill any new fork children of process PID that haven't been
8530 processed by follow_fork. */
8533 kill_new_fork_children (int pid
, struct remote_state
*rs
)
8535 struct thread_info
*thread
;
8536 struct notif_client
*notif
= ¬if_client_stop
;
8537 struct queue_iter_param param
;
8539 /* Kill the fork child threads of any threads in process PID
8540 that are stopped at a fork event. */
8541 ALL_NON_EXITED_THREADS (thread
)
8543 struct target_waitstatus
*ws
= &thread
->pending_follow
;
8545 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
8547 struct remote_state
*rs
= get_remote_state ();
8548 int child_pid
= ptid_get_pid (ws
->value
.related_pid
);
8551 res
= remote_vkill (child_pid
, rs
);
8553 error (_("Can't kill fork child process %d"), child_pid
);
8557 /* Check for any pending fork events (not reported or processed yet)
8558 in process PID and kill those fork child threads as well. */
8559 remote_notif_get_pending_events (notif
);
8561 param
.output
= NULL
;
8562 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
8563 kill_child_of_pending_fork
, ¶m
);
8568 remote_kill (struct target_ops
*ops
)
8571 /* Catch errors so the user can quit from gdb even when we
8572 aren't on speaking terms with the remote system. */
8577 CATCH (ex
, RETURN_MASK_ERROR
)
8579 if (ex
.error
== TARGET_CLOSE_ERROR
)
8581 /* If we got an (EOF) error that caused the target
8582 to go away, then we're done, that's what we wanted.
8583 "k" is susceptible to cause a premature EOF, given
8584 that the remote server isn't actually required to
8585 reply to "k", and it can happen that it doesn't
8586 even get to reply ACK to the "k". */
8590 /* Otherwise, something went wrong. We didn't actually kill
8591 the target. Just propagate the exception, and let the
8592 user or higher layers decide what to do. */
8593 throw_exception (ex
);
8597 /* We've killed the remote end, we get to mourn it. Since this is
8598 target remote, single-process, mourning the inferior also
8599 unpushes remote_ops. */
8600 target_mourn_inferior ();
8604 remote_vkill (int pid
, struct remote_state
*rs
)
8606 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
8609 /* Tell the remote target to detach. */
8610 xsnprintf (rs
->buf
, get_remote_packet_size (), "vKill;%x", pid
);
8612 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8614 switch (packet_ok (rs
->buf
,
8615 &remote_protocol_packets
[PACKET_vKill
]))
8621 case PACKET_UNKNOWN
:
8624 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
8629 extended_remote_kill (struct target_ops
*ops
)
8632 int pid
= ptid_get_pid (inferior_ptid
);
8633 struct remote_state
*rs
= get_remote_state ();
8635 /* If we're stopped while forking and we haven't followed yet, kill the
8636 child task. We need to do this before killing the parent task
8637 because if this is a vfork then the parent will be sleeping. */
8638 kill_new_fork_children (pid
, rs
);
8640 res
= remote_vkill (pid
, rs
);
8641 if (res
== -1 && !(rs
->extended
&& remote_multi_process_p (rs
)))
8643 /* Don't try 'k' on a multi-process aware stub -- it has no way
8644 to specify the pid. */
8648 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8649 if (rs
->buf
[0] != 'O' || rs
->buf
[0] != 'K')
8652 /* Don't wait for it to die. I'm not really sure it matters whether
8653 we do or not. For the existing stubs, kill is a noop. */
8659 error (_("Can't kill process"));
8661 target_mourn_inferior ();
8665 remote_mourn (struct target_ops
*target
)
8667 unpush_target (target
);
8669 /* remote_close takes care of doing most of the clean up. */
8670 generic_mourn_inferior ();
8674 extended_remote_mourn (struct target_ops
*target
)
8676 struct remote_state
*rs
= get_remote_state ();
8678 /* In case we got here due to an error, but we're going to stay
8680 rs
->waiting_for_stop_reply
= 0;
8682 /* If the current general thread belonged to the process we just
8683 detached from or has exited, the remote side current general
8684 thread becomes undefined. Considering a case like this:
8686 - We just got here due to a detach.
8687 - The process that we're detaching from happens to immediately
8688 report a global breakpoint being hit in non-stop mode, in the
8689 same thread we had selected before.
8690 - GDB attaches to this process again.
8691 - This event happens to be the next event we handle.
8693 GDB would consider that the current general thread didn't need to
8694 be set on the stub side (with Hg), since for all it knew,
8695 GENERAL_THREAD hadn't changed.
8697 Notice that although in all-stop mode, the remote server always
8698 sets the current thread to the thread reporting the stop event,
8699 that doesn't happen in non-stop mode; in non-stop, the stub *must
8700 not* change the current thread when reporting a breakpoint hit,
8701 due to the decoupling of event reporting and event handling.
8703 To keep things simple, we always invalidate our notion of the
8705 record_currthread (rs
, minus_one_ptid
);
8707 /* Unlike "target remote", we do not want to unpush the target; then
8708 the next time the user says "run", we won't be connected. */
8710 /* Call common code to mark the inferior as not running. */
8711 generic_mourn_inferior ();
8713 if (!have_inferiors ())
8715 if (!remote_multi_process_p (rs
))
8717 /* Check whether the target is running now - some remote stubs
8718 automatically restart after kill. */
8720 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8722 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
8724 /* Assume that the target has been restarted. Set
8725 inferior_ptid so that bits of core GDB realizes
8726 there's something here, e.g., so that the user can
8727 say "kill" again. */
8728 inferior_ptid
= magic_null_ptid
;
8735 extended_remote_supports_disable_randomization (struct target_ops
*self
)
8737 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
8741 extended_remote_disable_randomization (int val
)
8743 struct remote_state
*rs
= get_remote_state ();
8746 xsnprintf (rs
->buf
, get_remote_packet_size (), "QDisableRandomization:%x",
8749 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
8751 error (_("Target does not support QDisableRandomization."));
8752 if (strcmp (reply
, "OK") != 0)
8753 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
8757 extended_remote_run (char *args
)
8759 struct remote_state
*rs
= get_remote_state ();
8761 const char *remote_exec_file
= get_remote_exec_file ();
8763 /* If the user has disabled vRun support, or we have detected that
8764 support is not available, do not try it. */
8765 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
8768 strcpy (rs
->buf
, "vRun;");
8769 len
= strlen (rs
->buf
);
8771 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
8772 error (_("Remote file name too long for run packet"));
8773 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
,
8774 strlen (remote_exec_file
));
8776 gdb_assert (args
!= NULL
);
8779 struct cleanup
*back_to
;
8783 argv
= gdb_buildargv (args
);
8784 back_to
= make_cleanup_freeargv (argv
);
8785 for (i
= 0; argv
[i
] != NULL
; i
++)
8787 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
8788 error (_("Argument list too long for run packet"));
8789 rs
->buf
[len
++] = ';';
8790 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
,
8793 do_cleanups (back_to
);
8796 rs
->buf
[len
++] = '\0';
8799 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8801 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
8804 /* We have a wait response. All is well. */
8806 case PACKET_UNKNOWN
:
8809 if (remote_exec_file
[0] == '\0')
8810 error (_("Running the default executable on the remote target failed; "
8811 "try \"set remote exec-file\"?"));
8813 error (_("Running \"%s\" on the remote target failed"),
8816 gdb_assert_not_reached (_("bad switch"));
8820 /* In the extended protocol we want to be able to do things like
8821 "run" and have them basically work as expected. So we need
8822 a special create_inferior function. We support changing the
8823 executable file and the command line arguments, but not the
8827 extended_remote_create_inferior (struct target_ops
*ops
,
8828 char *exec_file
, char *args
,
8829 char **env
, int from_tty
)
8833 struct remote_state
*rs
= get_remote_state ();
8834 const char *remote_exec_file
= get_remote_exec_file ();
8836 /* If running asynchronously, register the target file descriptor
8837 with the event loop. */
8838 if (target_can_async_p ())
8841 /* Disable address space randomization if requested (and supported). */
8842 if (extended_remote_supports_disable_randomization (ops
))
8843 extended_remote_disable_randomization (disable_randomization
);
8845 /* Now restart the remote server. */
8846 run_worked
= extended_remote_run (args
) != -1;
8849 /* vRun was not supported. Fail if we need it to do what the
8851 if (remote_exec_file
[0])
8852 error (_("Remote target does not support \"set remote exec-file\""));
8854 error (_("Remote target does not support \"set args\" or run <ARGS>"));
8856 /* Fall back to "R". */
8857 extended_remote_restart ();
8860 if (!have_inferiors ())
8862 /* Clean up from the last time we ran, before we mark the target
8863 running again. This will mark breakpoints uninserted, and
8864 get_offsets may insert breakpoints. */
8865 init_thread_list ();
8866 init_wait_for_inferior ();
8869 /* vRun's success return is a stop reply. */
8870 stop_reply
= run_worked
? rs
->buf
: NULL
;
8871 add_current_inferior_and_thread (stop_reply
);
8873 /* Get updated offsets, if the stub uses qOffsets. */
8878 /* Given a location's target info BP_TGT and the packet buffer BUF, output
8879 the list of conditions (in agent expression bytecode format), if any, the
8880 target needs to evaluate. The output is placed into the packet buffer
8881 started from BUF and ended at BUF_END. */
8884 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
8885 struct bp_target_info
*bp_tgt
, char *buf
,
8888 struct agent_expr
*aexpr
= NULL
;
8891 char *buf_start
= buf
;
8893 if (VEC_empty (agent_expr_p
, bp_tgt
->conditions
))
8896 buf
+= strlen (buf
);
8897 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
8900 /* Send conditions to the target and free the vector. */
8902 VEC_iterate (agent_expr_p
, bp_tgt
->conditions
, ix
, aexpr
);
8905 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
8906 buf
+= strlen (buf
);
8907 for (i
= 0; i
< aexpr
->len
; ++i
)
8908 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
8915 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
8916 struct bp_target_info
*bp_tgt
, char *buf
)
8918 struct agent_expr
*aexpr
= NULL
;
8921 if (VEC_empty (agent_expr_p
, bp_tgt
->tcommands
))
8924 buf
+= strlen (buf
);
8926 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
8927 buf
+= strlen (buf
);
8929 /* Concatenate all the agent expressions that are commands into the
8932 VEC_iterate (agent_expr_p
, bp_tgt
->tcommands
, ix
, aexpr
);
8935 sprintf (buf
, "X%x,", aexpr
->len
);
8936 buf
+= strlen (buf
);
8937 for (i
= 0; i
< aexpr
->len
; ++i
)
8938 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
8943 /* Insert a breakpoint. On targets that have software breakpoint
8944 support, we ask the remote target to do the work; on targets
8945 which don't, we insert a traditional memory breakpoint. */
8948 remote_insert_breakpoint (struct target_ops
*ops
,
8949 struct gdbarch
*gdbarch
,
8950 struct bp_target_info
*bp_tgt
)
8952 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
8953 If it succeeds, then set the support to PACKET_ENABLE. If it
8954 fails, and the user has explicitly requested the Z support then
8955 report an error, otherwise, mark it disabled and go on. */
8957 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
8959 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
8960 struct remote_state
*rs
;
8963 struct condition_list
*cond
= NULL
;
8965 /* Make sure the remote is pointing at the right process, if
8967 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
8968 set_general_process ();
8970 gdbarch_remote_breakpoint_from_pc (gdbarch
, &addr
, &bpsize
);
8972 rs
= get_remote_state ();
8974 endbuf
= rs
->buf
+ get_remote_packet_size ();
8979 addr
= (ULONGEST
) remote_address_masked (addr
);
8980 p
+= hexnumstr (p
, addr
);
8981 xsnprintf (p
, endbuf
- p
, ",%d", bpsize
);
8983 if (remote_supports_cond_breakpoints (ops
))
8984 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
8986 if (remote_can_run_breakpoint_commands (ops
))
8987 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
8990 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8992 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
8997 bp_tgt
->placed_address
= addr
;
8998 bp_tgt
->placed_size
= bpsize
;
9000 case PACKET_UNKNOWN
:
9005 /* If this breakpoint has target-side commands but this stub doesn't
9006 support Z0 packets, throw error. */
9007 if (!VEC_empty (agent_expr_p
, bp_tgt
->tcommands
))
9008 throw_error (NOT_SUPPORTED_ERROR
, _("\
9009 Target doesn't support breakpoints that have target side commands."));
9011 return memory_insert_breakpoint (ops
, gdbarch
, bp_tgt
);
9015 remote_remove_breakpoint (struct target_ops
*ops
,
9016 struct gdbarch
*gdbarch
,
9017 struct bp_target_info
*bp_tgt
)
9019 CORE_ADDR addr
= bp_tgt
->placed_address
;
9020 struct remote_state
*rs
= get_remote_state ();
9022 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9025 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9027 /* Make sure the remote is pointing at the right process, if
9029 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9030 set_general_process ();
9036 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
9037 p
+= hexnumstr (p
, addr
);
9038 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->placed_size
);
9041 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9043 return (rs
->buf
[0] == 'E');
9046 return memory_remove_breakpoint (ops
, gdbarch
, bp_tgt
);
9049 static enum Z_packet_type
9050 watchpoint_to_Z_packet (int type
)
9055 return Z_PACKET_WRITE_WP
;
9058 return Z_PACKET_READ_WP
;
9061 return Z_PACKET_ACCESS_WP
;
9064 internal_error (__FILE__
, __LINE__
,
9065 _("hw_bp_to_z: bad watchpoint type %d"), type
);
9070 remote_insert_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9071 enum target_hw_bp_type type
, struct expression
*cond
)
9073 struct remote_state
*rs
= get_remote_state ();
9074 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9076 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9078 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9081 /* Make sure the remote is pointing at the right process, if
9083 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9084 set_general_process ();
9086 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "Z%x,", packet
);
9087 p
= strchr (rs
->buf
, '\0');
9088 addr
= remote_address_masked (addr
);
9089 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9090 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9093 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9095 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9099 case PACKET_UNKNOWN
:
9104 internal_error (__FILE__
, __LINE__
,
9105 _("remote_insert_watchpoint: reached end of function"));
9109 remote_watchpoint_addr_within_range (struct target_ops
*target
, CORE_ADDR addr
,
9110 CORE_ADDR start
, int length
)
9112 CORE_ADDR diff
= remote_address_masked (addr
- start
);
9114 return diff
< length
;
9119 remote_remove_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9120 enum target_hw_bp_type type
, struct expression
*cond
)
9122 struct remote_state
*rs
= get_remote_state ();
9123 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9125 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9127 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9130 /* Make sure the remote is pointing at the right process, if
9132 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9133 set_general_process ();
9135 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "z%x,", packet
);
9136 p
= strchr (rs
->buf
, '\0');
9137 addr
= remote_address_masked (addr
);
9138 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9139 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9141 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9143 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9146 case PACKET_UNKNOWN
:
9151 internal_error (__FILE__
, __LINE__
,
9152 _("remote_remove_watchpoint: reached end of function"));
9156 int remote_hw_watchpoint_limit
= -1;
9157 int remote_hw_watchpoint_length_limit
= -1;
9158 int remote_hw_breakpoint_limit
= -1;
9161 remote_region_ok_for_hw_watchpoint (struct target_ops
*self
,
9162 CORE_ADDR addr
, int len
)
9164 if (remote_hw_watchpoint_length_limit
== 0)
9166 else if (remote_hw_watchpoint_length_limit
< 0)
9168 else if (len
<= remote_hw_watchpoint_length_limit
)
9175 remote_check_watch_resources (struct target_ops
*self
,
9176 enum bptype type
, int cnt
, int ot
)
9178 if (type
== bp_hardware_breakpoint
)
9180 if (remote_hw_breakpoint_limit
== 0)
9182 else if (remote_hw_breakpoint_limit
< 0)
9184 else if (cnt
<= remote_hw_breakpoint_limit
)
9189 if (remote_hw_watchpoint_limit
== 0)
9191 else if (remote_hw_watchpoint_limit
< 0)
9195 else if (cnt
<= remote_hw_watchpoint_limit
)
9201 /* The to_stopped_by_sw_breakpoint method of target remote. */
9204 remote_stopped_by_sw_breakpoint (struct target_ops
*ops
)
9206 struct remote_state
*rs
= get_remote_state ();
9208 return rs
->stop_reason
== TARGET_STOPPED_BY_SW_BREAKPOINT
;
9211 /* The to_supports_stopped_by_sw_breakpoint method of target
9215 remote_supports_stopped_by_sw_breakpoint (struct target_ops
*ops
)
9217 struct remote_state
*rs
= get_remote_state ();
9219 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
9222 /* The to_stopped_by_hw_breakpoint method of target remote. */
9225 remote_stopped_by_hw_breakpoint (struct target_ops
*ops
)
9227 struct remote_state
*rs
= get_remote_state ();
9229 return rs
->stop_reason
== TARGET_STOPPED_BY_HW_BREAKPOINT
;
9232 /* The to_supports_stopped_by_hw_breakpoint method of target
9236 remote_supports_stopped_by_hw_breakpoint (struct target_ops
*ops
)
9238 struct remote_state
*rs
= get_remote_state ();
9240 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
9244 remote_stopped_by_watchpoint (struct target_ops
*ops
)
9246 struct remote_state
*rs
= get_remote_state ();
9248 return rs
->stop_reason
== TARGET_STOPPED_BY_WATCHPOINT
;
9252 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
9254 struct remote_state
*rs
= get_remote_state ();
9257 if (remote_stopped_by_watchpoint (target
))
9259 *addr_p
= rs
->remote_watch_data_address
;
9268 remote_insert_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
9269 struct bp_target_info
*bp_tgt
)
9271 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
9272 struct remote_state
*rs
;
9277 /* The length field should be set to the size of a breakpoint
9278 instruction, even though we aren't inserting one ourselves. */
9280 gdbarch_remote_breakpoint_from_pc (gdbarch
, &addr
, &bpsize
);
9282 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
9285 /* Make sure the remote is pointing at the right process, if
9287 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9288 set_general_process ();
9290 rs
= get_remote_state ();
9292 endbuf
= rs
->buf
+ get_remote_packet_size ();
9298 addr
= remote_address_masked (addr
);
9299 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9300 xsnprintf (p
, endbuf
- p
, ",%x", bpsize
);
9302 if (remote_supports_cond_breakpoints (self
))
9303 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
9305 if (remote_can_run_breakpoint_commands (self
))
9306 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
9309 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9311 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
9314 if (rs
->buf
[1] == '.')
9316 message
= strchr (rs
->buf
+ 2, '.');
9318 error (_("Remote failure reply: %s"), message
+ 1);
9321 case PACKET_UNKNOWN
:
9324 bp_tgt
->placed_address
= addr
;
9325 bp_tgt
->placed_size
= bpsize
;
9328 internal_error (__FILE__
, __LINE__
,
9329 _("remote_insert_hw_breakpoint: reached end of function"));
9334 remote_remove_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
9335 struct bp_target_info
*bp_tgt
)
9338 struct remote_state
*rs
= get_remote_state ();
9340 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9342 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
9345 /* Make sure the remote is pointing at the right process, if
9347 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9348 set_general_process ();
9354 addr
= remote_address_masked (bp_tgt
->placed_address
);
9355 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9356 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->placed_size
);
9359 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9361 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
9364 case PACKET_UNKNOWN
:
9369 internal_error (__FILE__
, __LINE__
,
9370 _("remote_remove_hw_breakpoint: reached end of function"));
9373 /* Verify memory using the "qCRC:" request. */
9376 remote_verify_memory (struct target_ops
*ops
,
9377 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
9379 struct remote_state
*rs
= get_remote_state ();
9380 unsigned long host_crc
, target_crc
;
9383 /* It doesn't make sense to use qCRC if the remote target is
9384 connected but not running. */
9385 if (target_has_execution
&& packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
9387 enum packet_result result
;
9389 /* Make sure the remote is pointing at the right process. */
9390 set_general_process ();
9392 /* FIXME: assumes lma can fit into long. */
9393 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
9394 (long) lma
, (long) size
);
9397 /* Be clever; compute the host_crc before waiting for target
9399 host_crc
= xcrc32 (data
, size
, 0xffffffff);
9401 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9403 result
= packet_ok (rs
->buf
,
9404 &remote_protocol_packets
[PACKET_qCRC
]);
9405 if (result
== PACKET_ERROR
)
9407 else if (result
== PACKET_OK
)
9409 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
9410 target_crc
= target_crc
* 16 + fromhex (*tmp
);
9412 return (host_crc
== target_crc
);
9416 return simple_verify_memory (ops
, data
, lma
, size
);
9419 /* compare-sections command
9421 With no arguments, compares each loadable section in the exec bfd
9422 with the same memory range on the target, and reports mismatches.
9423 Useful for verifying the image on the target against the exec file. */
9426 compare_sections_command (char *args
, int from_tty
)
9429 struct cleanup
*old_chain
;
9431 const char *sectname
;
9440 error (_("command cannot be used without an exec file"));
9442 /* Make sure the remote is pointing at the right process. */
9443 set_general_process ();
9445 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
9451 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
9453 if (!(s
->flags
& SEC_LOAD
))
9454 continue; /* Skip non-loadable section. */
9456 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
9457 continue; /* Skip writeable sections */
9459 size
= bfd_get_section_size (s
);
9461 continue; /* Skip zero-length section. */
9463 sectname
= bfd_get_section_name (exec_bfd
, s
);
9464 if (args
&& strcmp (args
, sectname
) != 0)
9465 continue; /* Not the section selected by user. */
9467 matched
= 1; /* Do this section. */
9470 sectdata
= (gdb_byte
*) xmalloc (size
);
9471 old_chain
= make_cleanup (xfree
, sectdata
);
9472 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
9474 res
= target_verify_memory (sectdata
, lma
, size
);
9477 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
9478 paddress (target_gdbarch (), lma
),
9479 paddress (target_gdbarch (), lma
+ size
));
9481 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
9482 paddress (target_gdbarch (), lma
),
9483 paddress (target_gdbarch (), lma
+ size
));
9485 printf_filtered ("matched.\n");
9488 printf_filtered ("MIS-MATCHED!\n");
9492 do_cleanups (old_chain
);
9495 warning (_("One or more sections of the target image does not match\n\
9496 the loaded file\n"));
9497 if (args
&& !matched
)
9498 printf_filtered (_("No loaded section named '%s'.\n"), args
);
9501 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
9502 into remote target. The number of bytes written to the remote
9503 target is returned, or -1 for error. */
9505 static enum target_xfer_status
9506 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
9507 const char *annex
, const gdb_byte
*writebuf
,
9508 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
,
9509 struct packet_config
*packet
)
9513 struct remote_state
*rs
= get_remote_state ();
9514 int max_size
= get_memory_write_packet_size ();
9516 if (packet
->support
== PACKET_DISABLE
)
9517 return TARGET_XFER_E_IO
;
9519 /* Insert header. */
9520 i
= snprintf (rs
->buf
, max_size
,
9521 "qXfer:%s:write:%s:%s:",
9522 object_name
, annex
? annex
: "",
9523 phex_nz (offset
, sizeof offset
));
9524 max_size
-= (i
+ 1);
9526 /* Escape as much data as fits into rs->buf. */
9527 buf_len
= remote_escape_output
9528 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
+ i
, &max_size
, max_size
);
9530 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
9531 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
9532 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
9533 return TARGET_XFER_E_IO
;
9535 unpack_varlen_hex (rs
->buf
, &n
);
9538 return TARGET_XFER_OK
;
9541 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
9542 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
9543 number of bytes read is returned, or 0 for EOF, or -1 for error.
9544 The number of bytes read may be less than LEN without indicating an
9545 EOF. PACKET is checked and updated to indicate whether the remote
9546 target supports this object. */
9548 static enum target_xfer_status
9549 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
9551 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
9552 ULONGEST
*xfered_len
,
9553 struct packet_config
*packet
)
9555 struct remote_state
*rs
= get_remote_state ();
9556 LONGEST i
, n
, packet_len
;
9558 if (packet
->support
== PACKET_DISABLE
)
9559 return TARGET_XFER_E_IO
;
9561 /* Check whether we've cached an end-of-object packet that matches
9563 if (rs
->finished_object
)
9565 if (strcmp (object_name
, rs
->finished_object
) == 0
9566 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
9567 && offset
== rs
->finished_offset
)
9568 return TARGET_XFER_EOF
;
9571 /* Otherwise, we're now reading something different. Discard
9573 xfree (rs
->finished_object
);
9574 xfree (rs
->finished_annex
);
9575 rs
->finished_object
= NULL
;
9576 rs
->finished_annex
= NULL
;
9579 /* Request only enough to fit in a single packet. The actual data
9580 may not, since we don't know how much of it will need to be escaped;
9581 the target is free to respond with slightly less data. We subtract
9582 five to account for the response type and the protocol frame. */
9583 n
= min (get_remote_packet_size () - 5, len
);
9584 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
9585 object_name
, annex
? annex
: "",
9586 phex_nz (offset
, sizeof offset
),
9587 phex_nz (n
, sizeof n
));
9588 i
= putpkt (rs
->buf
);
9590 return TARGET_XFER_E_IO
;
9593 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
9594 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
9595 return TARGET_XFER_E_IO
;
9597 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
9598 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
9600 /* 'm' means there is (or at least might be) more data after this
9601 batch. That does not make sense unless there's at least one byte
9602 of data in this reply. */
9603 if (rs
->buf
[0] == 'm' && packet_len
== 1)
9604 error (_("Remote qXfer reply contained no data."));
9606 /* Got some data. */
9607 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
+ 1,
9608 packet_len
- 1, readbuf
, n
);
9610 /* 'l' is an EOF marker, possibly including a final block of data,
9611 or possibly empty. If we have the final block of a non-empty
9612 object, record this fact to bypass a subsequent partial read. */
9613 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
9615 rs
->finished_object
= xstrdup (object_name
);
9616 rs
->finished_annex
= xstrdup (annex
? annex
: "");
9617 rs
->finished_offset
= offset
+ i
;
9621 return TARGET_XFER_EOF
;
9625 return TARGET_XFER_OK
;
9629 static enum target_xfer_status
9630 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
9631 const char *annex
, gdb_byte
*readbuf
,
9632 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
9633 ULONGEST
*xfered_len
)
9635 struct remote_state
*rs
;
9639 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
9641 set_remote_traceframe ();
9642 set_general_thread (inferior_ptid
);
9644 rs
= get_remote_state ();
9646 /* Handle memory using the standard memory routines. */
9647 if (object
== TARGET_OBJECT_MEMORY
)
9649 /* If the remote target is connected but not running, we should
9650 pass this request down to a lower stratum (e.g. the executable
9652 if (!target_has_execution
)
9653 return TARGET_XFER_EOF
;
9655 if (writebuf
!= NULL
)
9656 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
9659 return remote_read_bytes (ops
, offset
, readbuf
, len
, unit_size
,
9663 /* Handle SPU memory using qxfer packets. */
9664 if (object
== TARGET_OBJECT_SPU
)
9667 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
9668 xfered_len
, &remote_protocol_packets
9669 [PACKET_qXfer_spu_read
]);
9671 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
9672 xfered_len
, &remote_protocol_packets
9673 [PACKET_qXfer_spu_write
]);
9676 /* Handle extra signal info using qxfer packets. */
9677 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
9680 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
9681 xfered_len
, &remote_protocol_packets
9682 [PACKET_qXfer_siginfo_read
]);
9684 return remote_write_qxfer (ops
, "siginfo", annex
,
9685 writebuf
, offset
, len
, xfered_len
,
9686 &remote_protocol_packets
9687 [PACKET_qXfer_siginfo_write
]);
9690 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
9693 return remote_read_qxfer (ops
, "statictrace", annex
,
9694 readbuf
, offset
, len
, xfered_len
,
9695 &remote_protocol_packets
9696 [PACKET_qXfer_statictrace_read
]);
9698 return TARGET_XFER_E_IO
;
9701 /* Only handle flash writes. */
9702 if (writebuf
!= NULL
)
9708 case TARGET_OBJECT_FLASH
:
9709 return remote_flash_write (ops
, offset
, len
, xfered_len
,
9713 return TARGET_XFER_E_IO
;
9717 /* Map pre-existing objects onto letters. DO NOT do this for new
9718 objects!!! Instead specify new query packets. */
9721 case TARGET_OBJECT_AVR
:
9725 case TARGET_OBJECT_AUXV
:
9726 gdb_assert (annex
== NULL
);
9727 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
9729 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
9731 case TARGET_OBJECT_AVAILABLE_FEATURES
:
9732 return remote_read_qxfer
9733 (ops
, "features", annex
, readbuf
, offset
, len
, xfered_len
,
9734 &remote_protocol_packets
[PACKET_qXfer_features
]);
9736 case TARGET_OBJECT_LIBRARIES
:
9737 return remote_read_qxfer
9738 (ops
, "libraries", annex
, readbuf
, offset
, len
, xfered_len
,
9739 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
9741 case TARGET_OBJECT_LIBRARIES_SVR4
:
9742 return remote_read_qxfer
9743 (ops
, "libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
9744 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
9746 case TARGET_OBJECT_MEMORY_MAP
:
9747 gdb_assert (annex
== NULL
);
9748 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
9750 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
9752 case TARGET_OBJECT_OSDATA
:
9753 /* Should only get here if we're connected. */
9754 gdb_assert (rs
->remote_desc
);
9755 return remote_read_qxfer
9756 (ops
, "osdata", annex
, readbuf
, offset
, len
, xfered_len
,
9757 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
9759 case TARGET_OBJECT_THREADS
:
9760 gdb_assert (annex
== NULL
);
9761 return remote_read_qxfer (ops
, "threads", annex
, readbuf
, offset
, len
,
9763 &remote_protocol_packets
[PACKET_qXfer_threads
]);
9765 case TARGET_OBJECT_TRACEFRAME_INFO
:
9766 gdb_assert (annex
== NULL
);
9767 return remote_read_qxfer
9768 (ops
, "traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
9769 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
9771 case TARGET_OBJECT_FDPIC
:
9772 return remote_read_qxfer (ops
, "fdpic", annex
, readbuf
, offset
, len
,
9774 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
9776 case TARGET_OBJECT_OPENVMS_UIB
:
9777 return remote_read_qxfer (ops
, "uib", annex
, readbuf
, offset
, len
,
9779 &remote_protocol_packets
[PACKET_qXfer_uib
]);
9781 case TARGET_OBJECT_BTRACE
:
9782 return remote_read_qxfer (ops
, "btrace", annex
, readbuf
, offset
, len
,
9784 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
9786 case TARGET_OBJECT_BTRACE_CONF
:
9787 return remote_read_qxfer (ops
, "btrace-conf", annex
, readbuf
, offset
,
9789 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
9791 case TARGET_OBJECT_EXEC_FILE
:
9792 return remote_read_qxfer (ops
, "exec-file", annex
, readbuf
, offset
,
9794 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
9797 return TARGET_XFER_E_IO
;
9800 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
9801 large enough let the caller deal with it. */
9802 if (len
< get_remote_packet_size ())
9803 return TARGET_XFER_E_IO
;
9804 len
= get_remote_packet_size ();
9806 /* Except for querying the minimum buffer size, target must be open. */
9807 if (!rs
->remote_desc
)
9808 error (_("remote query is only available after target open"));
9810 gdb_assert (annex
!= NULL
);
9811 gdb_assert (readbuf
!= NULL
);
9817 /* We used one buffer char for the remote protocol q command and
9818 another for the query type. As the remote protocol encapsulation
9819 uses 4 chars plus one extra in case we are debugging
9820 (remote_debug), we have PBUFZIZ - 7 left to pack the query
9823 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
9825 /* Bad caller may have sent forbidden characters. */
9826 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
9831 gdb_assert (annex
[i
] == '\0');
9833 i
= putpkt (rs
->buf
);
9835 return TARGET_XFER_E_IO
;
9837 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9838 strcpy ((char *) readbuf
, rs
->buf
);
9840 *xfered_len
= strlen ((char *) readbuf
);
9841 return TARGET_XFER_OK
;
9845 remote_search_memory (struct target_ops
* ops
,
9846 CORE_ADDR start_addr
, ULONGEST search_space_len
,
9847 const gdb_byte
*pattern
, ULONGEST pattern_len
,
9848 CORE_ADDR
*found_addrp
)
9850 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
9851 struct remote_state
*rs
= get_remote_state ();
9852 int max_size
= get_memory_write_packet_size ();
9853 struct packet_config
*packet
=
9854 &remote_protocol_packets
[PACKET_qSearch_memory
];
9855 /* Number of packet bytes used to encode the pattern;
9856 this could be more than PATTERN_LEN due to escape characters. */
9857 int escaped_pattern_len
;
9858 /* Amount of pattern that was encodable in the packet. */
9859 int used_pattern_len
;
9862 ULONGEST found_addr
;
9864 /* Don't go to the target if we don't have to.
9865 This is done before checking packet->support to avoid the possibility that
9866 a success for this edge case means the facility works in general. */
9867 if (pattern_len
> search_space_len
)
9869 if (pattern_len
== 0)
9871 *found_addrp
= start_addr
;
9875 /* If we already know the packet isn't supported, fall back to the simple
9876 way of searching memory. */
9878 if (packet_config_support (packet
) == PACKET_DISABLE
)
9880 /* Target doesn't provided special support, fall back and use the
9881 standard support (copy memory and do the search here). */
9882 return simple_search_memory (ops
, start_addr
, search_space_len
,
9883 pattern
, pattern_len
, found_addrp
);
9886 /* Make sure the remote is pointing at the right process. */
9887 set_general_process ();
9889 /* Insert header. */
9890 i
= snprintf (rs
->buf
, max_size
,
9891 "qSearch:memory:%s;%s;",
9892 phex_nz (start_addr
, addr_size
),
9893 phex_nz (search_space_len
, sizeof (search_space_len
)));
9894 max_size
-= (i
+ 1);
9896 /* Escape as much data as fits into rs->buf. */
9897 escaped_pattern_len
=
9898 remote_escape_output (pattern
, pattern_len
, 1, (gdb_byte
*) rs
->buf
+ i
,
9899 &used_pattern_len
, max_size
);
9901 /* Bail if the pattern is too large. */
9902 if (used_pattern_len
!= pattern_len
)
9903 error (_("Pattern is too large to transmit to remote target."));
9905 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
9906 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
9907 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
9909 /* The request may not have worked because the command is not
9910 supported. If so, fall back to the simple way. */
9911 if (packet
->support
== PACKET_DISABLE
)
9913 return simple_search_memory (ops
, start_addr
, search_space_len
,
9914 pattern
, pattern_len
, found_addrp
);
9919 if (rs
->buf
[0] == '0')
9921 else if (rs
->buf
[0] == '1')
9924 if (rs
->buf
[1] != ',')
9925 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
9926 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
9927 *found_addrp
= found_addr
;
9930 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
9936 remote_rcmd (struct target_ops
*self
, const char *command
,
9937 struct ui_file
*outbuf
)
9939 struct remote_state
*rs
= get_remote_state ();
9942 if (!rs
->remote_desc
)
9943 error (_("remote rcmd is only available after target open"));
9945 /* Send a NULL command across as an empty command. */
9946 if (command
== NULL
)
9949 /* The query prefix. */
9950 strcpy (rs
->buf
, "qRcmd,");
9951 p
= strchr (rs
->buf
, '\0');
9953 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/)
9954 > get_remote_packet_size ())
9955 error (_("\"monitor\" command ``%s'' is too long."), command
);
9957 /* Encode the actual command. */
9958 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
9960 if (putpkt (rs
->buf
) < 0)
9961 error (_("Communication problem with target."));
9963 /* get/display the response */
9968 /* XXX - see also remote_get_noisy_reply(). */
9969 QUIT
; /* Allow user to bail out with ^C. */
9971 if (getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) == -1)
9973 /* Timeout. Continue to (try to) read responses.
9974 This is better than stopping with an error, assuming the stub
9975 is still executing the (long) monitor command.
9976 If needed, the user can interrupt gdb using C-c, obtaining
9977 an effect similar to stop on timeout. */
9982 error (_("Target does not support this command."));
9983 if (buf
[0] == 'O' && buf
[1] != 'K')
9985 remote_console_output (buf
+ 1); /* 'O' message from stub. */
9988 if (strcmp (buf
, "OK") == 0)
9990 if (strlen (buf
) == 3 && buf
[0] == 'E'
9991 && isdigit (buf
[1]) && isdigit (buf
[2]))
9993 error (_("Protocol error with Rcmd"));
9995 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
9997 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
9999 fputc_unfiltered (c
, outbuf
);
10005 static VEC(mem_region_s
) *
10006 remote_memory_map (struct target_ops
*ops
)
10008 VEC(mem_region_s
) *result
= NULL
;
10009 char *text
= target_read_stralloc (¤t_target
,
10010 TARGET_OBJECT_MEMORY_MAP
, NULL
);
10014 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
10016 result
= parse_memory_map (text
);
10017 do_cleanups (back_to
);
10024 packet_command (char *args
, int from_tty
)
10026 struct remote_state
*rs
= get_remote_state ();
10028 if (!rs
->remote_desc
)
10029 error (_("command can only be used with remote target"));
10032 error (_("remote-packet command requires packet text as argument"));
10034 puts_filtered ("sending: ");
10035 print_packet (args
);
10036 puts_filtered ("\n");
10039 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10040 puts_filtered ("received: ");
10041 print_packet (rs
->buf
);
10042 puts_filtered ("\n");
10046 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
10048 static void display_thread_info (struct gdb_ext_thread_info
*info
);
10050 static void threadset_test_cmd (char *cmd
, int tty
);
10052 static void threadalive_test (char *cmd
, int tty
);
10054 static void threadlist_test_cmd (char *cmd
, int tty
);
10056 int get_and_display_threadinfo (threadref
*ref
);
10058 static void threadinfo_test_cmd (char *cmd
, int tty
);
10060 static int thread_display_step (threadref
*ref
, void *context
);
10062 static void threadlist_update_test_cmd (char *cmd
, int tty
);
10064 static void init_remote_threadtests (void);
10066 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
10069 threadset_test_cmd (char *cmd
, int tty
)
10071 int sample_thread
= SAMPLE_THREAD
;
10073 printf_filtered (_("Remote threadset test\n"));
10074 set_general_thread (sample_thread
);
10079 threadalive_test (char *cmd
, int tty
)
10081 int sample_thread
= SAMPLE_THREAD
;
10082 int pid
= ptid_get_pid (inferior_ptid
);
10083 ptid_t ptid
= ptid_build (pid
, sample_thread
, 0);
10085 if (remote_thread_alive (ptid
))
10086 printf_filtered ("PASS: Thread alive test\n");
10088 printf_filtered ("FAIL: Thread alive test\n");
10091 void output_threadid (char *title
, threadref
*ref
);
10094 output_threadid (char *title
, threadref
*ref
)
10098 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
10100 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
10104 threadlist_test_cmd (char *cmd
, int tty
)
10107 threadref nextthread
;
10108 int done
, result_count
;
10109 threadref threadlist
[3];
10111 printf_filtered ("Remote Threadlist test\n");
10112 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
10113 &result_count
, &threadlist
[0]))
10114 printf_filtered ("FAIL: threadlist test\n");
10117 threadref
*scan
= threadlist
;
10118 threadref
*limit
= scan
+ result_count
;
10120 while (scan
< limit
)
10121 output_threadid (" thread ", scan
++);
10126 display_thread_info (struct gdb_ext_thread_info
*info
)
10128 output_threadid ("Threadid: ", &info
->threadid
);
10129 printf_filtered ("Name: %s\n ", info
->shortname
);
10130 printf_filtered ("State: %s\n", info
->display
);
10131 printf_filtered ("other: %s\n\n", info
->more_display
);
10135 get_and_display_threadinfo (threadref
*ref
)
10139 struct gdb_ext_thread_info threadinfo
;
10141 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
10142 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
10143 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
10144 display_thread_info (&threadinfo
);
10149 threadinfo_test_cmd (char *cmd
, int tty
)
10151 int athread
= SAMPLE_THREAD
;
10155 int_to_threadref (&thread
, athread
);
10156 printf_filtered ("Remote Threadinfo test\n");
10157 if (!get_and_display_threadinfo (&thread
))
10158 printf_filtered ("FAIL cannot get thread info\n");
10162 thread_display_step (threadref
*ref
, void *context
)
10164 /* output_threadid(" threadstep ",ref); *//* simple test */
10165 return get_and_display_threadinfo (ref
);
10169 threadlist_update_test_cmd (char *cmd
, int tty
)
10171 printf_filtered ("Remote Threadlist update test\n");
10172 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
10176 init_remote_threadtests (void)
10178 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
10179 _("Fetch and print the remote list of "
10180 "thread identifiers, one pkt only"));
10181 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
10182 _("Fetch and display info about one thread"));
10183 add_com ("tset", class_obscure
, threadset_test_cmd
,
10184 _("Test setting to a different thread"));
10185 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
10186 _("Iterate through updating all remote thread info"));
10187 add_com ("talive", class_obscure
, threadalive_test
,
10188 _(" Remote thread alive test "));
10193 /* Convert a thread ID to a string. Returns the string in a static
10197 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
10199 static char buf
[64];
10200 struct remote_state
*rs
= get_remote_state ();
10202 if (ptid_equal (ptid
, null_ptid
))
10203 return normal_pid_to_str (ptid
);
10204 else if (ptid_is_pid (ptid
))
10206 /* Printing an inferior target id. */
10208 /* When multi-process extensions are off, there's no way in the
10209 remote protocol to know the remote process id, if there's any
10210 at all. There's one exception --- when we're connected with
10211 target extended-remote, and we manually attached to a process
10212 with "attach PID". We don't record anywhere a flag that
10213 allows us to distinguish that case from the case of
10214 connecting with extended-remote and the stub already being
10215 attached to a process, and reporting yes to qAttached, hence
10216 no smart special casing here. */
10217 if (!remote_multi_process_p (rs
))
10219 xsnprintf (buf
, sizeof buf
, "Remote target");
10223 return normal_pid_to_str (ptid
);
10227 if (ptid_equal (magic_null_ptid
, ptid
))
10228 xsnprintf (buf
, sizeof buf
, "Thread <main>");
10229 else if (rs
->extended
&& remote_multi_process_p (rs
))
10230 if (ptid_get_lwp (ptid
) == 0)
10231 return normal_pid_to_str (ptid
);
10233 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
10234 ptid_get_pid (ptid
), ptid_get_lwp (ptid
));
10236 xsnprintf (buf
, sizeof buf
, "Thread %ld",
10237 ptid_get_lwp (ptid
));
10242 /* Get the address of the thread local variable in OBJFILE which is
10243 stored at OFFSET within the thread local storage for thread PTID. */
10246 remote_get_thread_local_address (struct target_ops
*ops
,
10247 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
10249 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
10251 struct remote_state
*rs
= get_remote_state ();
10253 char *endp
= rs
->buf
+ get_remote_packet_size ();
10254 enum packet_result result
;
10256 strcpy (p
, "qGetTLSAddr:");
10258 p
= write_ptid (p
, endp
, ptid
);
10260 p
+= hexnumstr (p
, offset
);
10262 p
+= hexnumstr (p
, lm
);
10266 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10267 result
= packet_ok (rs
->buf
,
10268 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
10269 if (result
== PACKET_OK
)
10273 unpack_varlen_hex (rs
->buf
, &result
);
10276 else if (result
== PACKET_UNKNOWN
)
10277 throw_error (TLS_GENERIC_ERROR
,
10278 _("Remote target doesn't support qGetTLSAddr packet"));
10280 throw_error (TLS_GENERIC_ERROR
,
10281 _("Remote target failed to process qGetTLSAddr request"));
10284 throw_error (TLS_GENERIC_ERROR
,
10285 _("TLS not supported or disabled on this target"));
10290 /* Provide thread local base, i.e. Thread Information Block address.
10291 Returns 1 if ptid is found and thread_local_base is non zero. */
10294 remote_get_tib_address (struct target_ops
*self
, ptid_t ptid
, CORE_ADDR
*addr
)
10296 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
10298 struct remote_state
*rs
= get_remote_state ();
10300 char *endp
= rs
->buf
+ get_remote_packet_size ();
10301 enum packet_result result
;
10303 strcpy (p
, "qGetTIBAddr:");
10305 p
= write_ptid (p
, endp
, ptid
);
10309 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10310 result
= packet_ok (rs
->buf
,
10311 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
10312 if (result
== PACKET_OK
)
10316 unpack_varlen_hex (rs
->buf
, &result
);
10318 *addr
= (CORE_ADDR
) result
;
10321 else if (result
== PACKET_UNKNOWN
)
10322 error (_("Remote target doesn't support qGetTIBAddr packet"));
10324 error (_("Remote target failed to process qGetTIBAddr request"));
10327 error (_("qGetTIBAddr not supported or disabled on this target"));
10332 /* Support for inferring a target description based on the current
10333 architecture and the size of a 'g' packet. While the 'g' packet
10334 can have any size (since optional registers can be left off the
10335 end), some sizes are easily recognizable given knowledge of the
10336 approximate architecture. */
10338 struct remote_g_packet_guess
10341 const struct target_desc
*tdesc
;
10343 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
10344 DEF_VEC_O(remote_g_packet_guess_s
);
10346 struct remote_g_packet_data
10348 VEC(remote_g_packet_guess_s
) *guesses
;
10351 static struct gdbarch_data
*remote_g_packet_data_handle
;
10354 remote_g_packet_data_init (struct obstack
*obstack
)
10356 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
10360 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
10361 const struct target_desc
*tdesc
)
10363 struct remote_g_packet_data
*data
10364 = ((struct remote_g_packet_data
*)
10365 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
10366 struct remote_g_packet_guess new_guess
, *guess
;
10369 gdb_assert (tdesc
!= NULL
);
10372 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
10374 if (guess
->bytes
== bytes
)
10375 internal_error (__FILE__
, __LINE__
,
10376 _("Duplicate g packet description added for size %d"),
10379 new_guess
.bytes
= bytes
;
10380 new_guess
.tdesc
= tdesc
;
10381 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
10384 /* Return 1 if remote_read_description would do anything on this target
10385 and architecture, 0 otherwise. */
10388 remote_read_description_p (struct target_ops
*target
)
10390 struct remote_g_packet_data
*data
10391 = ((struct remote_g_packet_data
*)
10392 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
10394 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
10400 static const struct target_desc
*
10401 remote_read_description (struct target_ops
*target
)
10403 struct remote_g_packet_data
*data
10404 = ((struct remote_g_packet_data
*)
10405 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
10407 /* Do not try this during initial connection, when we do not know
10408 whether there is a running but stopped thread. */
10409 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
10410 return target
->beneath
->to_read_description (target
->beneath
);
10412 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
10414 struct remote_g_packet_guess
*guess
;
10416 int bytes
= send_g_packet ();
10419 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
10421 if (guess
->bytes
== bytes
)
10422 return guess
->tdesc
;
10424 /* We discard the g packet. A minor optimization would be to
10425 hold on to it, and fill the register cache once we have selected
10426 an architecture, but it's too tricky to do safely. */
10429 return target
->beneath
->to_read_description (target
->beneath
);
10432 /* Remote file transfer support. This is host-initiated I/O, not
10433 target-initiated; for target-initiated, see remote-fileio.c. */
10435 /* If *LEFT is at least the length of STRING, copy STRING to
10436 *BUFFER, update *BUFFER to point to the new end of the buffer, and
10437 decrease *LEFT. Otherwise raise an error. */
10440 remote_buffer_add_string (char **buffer
, int *left
, char *string
)
10442 int len
= strlen (string
);
10445 error (_("Packet too long for target."));
10447 memcpy (*buffer
, string
, len
);
10451 /* NUL-terminate the buffer as a convenience, if there is
10457 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
10458 *BUFFER, update *BUFFER to point to the new end of the buffer, and
10459 decrease *LEFT. Otherwise raise an error. */
10462 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
10465 if (2 * len
> *left
)
10466 error (_("Packet too long for target."));
10468 bin2hex (bytes
, *buffer
, len
);
10469 *buffer
+= 2 * len
;
10472 /* NUL-terminate the buffer as a convenience, if there is
10478 /* If *LEFT is large enough, convert VALUE to hex and add it to
10479 *BUFFER, update *BUFFER to point to the new end of the buffer, and
10480 decrease *LEFT. Otherwise raise an error. */
10483 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
10485 int len
= hexnumlen (value
);
10488 error (_("Packet too long for target."));
10490 hexnumstr (*buffer
, value
);
10494 /* NUL-terminate the buffer as a convenience, if there is
10500 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
10501 value, *REMOTE_ERRNO to the remote error number or zero if none
10502 was included, and *ATTACHMENT to point to the start of the annex
10503 if any. The length of the packet isn't needed here; there may
10504 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
10506 Return 0 if the packet could be parsed, -1 if it could not. If
10507 -1 is returned, the other variables may not be initialized. */
10510 remote_hostio_parse_result (char *buffer
, int *retcode
,
10511 int *remote_errno
, char **attachment
)
10516 *attachment
= NULL
;
10518 if (buffer
[0] != 'F')
10522 *retcode
= strtol (&buffer
[1], &p
, 16);
10523 if (errno
!= 0 || p
== &buffer
[1])
10526 /* Check for ",errno". */
10530 *remote_errno
= strtol (p
+ 1, &p2
, 16);
10531 if (errno
!= 0 || p
+ 1 == p2
)
10536 /* Check for ";attachment". If there is no attachment, the
10537 packet should end here. */
10540 *attachment
= p
+ 1;
10543 else if (*p
== '\0')
10549 /* Send a prepared I/O packet to the target and read its response.
10550 The prepared packet is in the global RS->BUF before this function
10551 is called, and the answer is there when we return.
10553 COMMAND_BYTES is the length of the request to send, which may include
10554 binary data. WHICH_PACKET is the packet configuration to check
10555 before attempting a packet. If an error occurs, *REMOTE_ERRNO
10556 is set to the error number and -1 is returned. Otherwise the value
10557 returned by the function is returned.
10559 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
10560 attachment is expected; an error will be reported if there's a
10561 mismatch. If one is found, *ATTACHMENT will be set to point into
10562 the packet buffer and *ATTACHMENT_LEN will be set to the
10563 attachment's length. */
10566 remote_hostio_send_command (int command_bytes
, int which_packet
,
10567 int *remote_errno
, char **attachment
,
10568 int *attachment_len
)
10570 struct remote_state
*rs
= get_remote_state ();
10571 int ret
, bytes_read
;
10572 char *attachment_tmp
;
10574 if (!rs
->remote_desc
10575 || packet_support (which_packet
) == PACKET_DISABLE
)
10577 *remote_errno
= FILEIO_ENOSYS
;
10581 putpkt_binary (rs
->buf
, command_bytes
);
10582 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
10584 /* If it timed out, something is wrong. Don't try to parse the
10586 if (bytes_read
< 0)
10588 *remote_errno
= FILEIO_EINVAL
;
10592 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
10595 *remote_errno
= FILEIO_EINVAL
;
10597 case PACKET_UNKNOWN
:
10598 *remote_errno
= FILEIO_ENOSYS
;
10604 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
10607 *remote_errno
= FILEIO_EINVAL
;
10611 /* Make sure we saw an attachment if and only if we expected one. */
10612 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
10613 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
10615 *remote_errno
= FILEIO_EINVAL
;
10619 /* If an attachment was found, it must point into the packet buffer;
10620 work out how many bytes there were. */
10621 if (attachment_tmp
!= NULL
)
10623 *attachment
= attachment_tmp
;
10624 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
10630 /* Invalidate the readahead cache. */
10633 readahead_cache_invalidate (void)
10635 struct remote_state
*rs
= get_remote_state ();
10637 rs
->readahead_cache
.fd
= -1;
10640 /* Invalidate the readahead cache if it is holding data for FD. */
10643 readahead_cache_invalidate_fd (int fd
)
10645 struct remote_state
*rs
= get_remote_state ();
10647 if (rs
->readahead_cache
.fd
== fd
)
10648 rs
->readahead_cache
.fd
= -1;
10651 /* Set the filesystem remote_hostio functions that take FILENAME
10652 arguments will use. Return 0 on success, or -1 if an error
10653 occurs (and set *REMOTE_ERRNO). */
10656 remote_hostio_set_filesystem (struct inferior
*inf
, int *remote_errno
)
10658 struct remote_state
*rs
= get_remote_state ();
10659 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
10661 int left
= get_remote_packet_size () - 1;
10665 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
10668 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
10671 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
10673 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
10674 remote_buffer_add_string (&p
, &left
, arg
);
10676 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_setfs
,
10677 remote_errno
, NULL
, NULL
);
10679 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
10683 rs
->fs_pid
= required_pid
;
10688 /* Implementation of to_fileio_open. */
10691 remote_hostio_open (struct target_ops
*self
,
10692 struct inferior
*inf
, const char *filename
,
10693 int flags
, int mode
, int warn_if_slow
,
10696 struct remote_state
*rs
= get_remote_state ();
10698 int left
= get_remote_packet_size () - 1;
10702 static int warning_issued
= 0;
10704 printf_unfiltered (_("Reading %s from remote target...\n"),
10707 if (!warning_issued
)
10709 warning (_("File transfers from remote targets can be slow."
10710 " Use \"set sysroot\" to access files locally"
10712 warning_issued
= 1;
10716 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
10719 remote_buffer_add_string (&p
, &left
, "vFile:open:");
10721 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
10722 strlen (filename
));
10723 remote_buffer_add_string (&p
, &left
, ",");
10725 remote_buffer_add_int (&p
, &left
, flags
);
10726 remote_buffer_add_string (&p
, &left
, ",");
10728 remote_buffer_add_int (&p
, &left
, mode
);
10730 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
10731 remote_errno
, NULL
, NULL
);
10734 /* Implementation of to_fileio_pwrite. */
10737 remote_hostio_pwrite (struct target_ops
*self
,
10738 int fd
, const gdb_byte
*write_buf
, int len
,
10739 ULONGEST offset
, int *remote_errno
)
10741 struct remote_state
*rs
= get_remote_state ();
10743 int left
= get_remote_packet_size ();
10746 readahead_cache_invalidate_fd (fd
);
10748 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
10750 remote_buffer_add_int (&p
, &left
, fd
);
10751 remote_buffer_add_string (&p
, &left
, ",");
10753 remote_buffer_add_int (&p
, &left
, offset
);
10754 remote_buffer_add_string (&p
, &left
, ",");
10756 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
10757 get_remote_packet_size () - (p
- rs
->buf
));
10759 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
10760 remote_errno
, NULL
, NULL
);
10763 /* Helper for the implementation of to_fileio_pread. Read the file
10764 from the remote side with vFile:pread. */
10767 remote_hostio_pread_vFile (struct target_ops
*self
,
10768 int fd
, gdb_byte
*read_buf
, int len
,
10769 ULONGEST offset
, int *remote_errno
)
10771 struct remote_state
*rs
= get_remote_state ();
10774 int left
= get_remote_packet_size ();
10775 int ret
, attachment_len
;
10778 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
10780 remote_buffer_add_int (&p
, &left
, fd
);
10781 remote_buffer_add_string (&p
, &left
, ",");
10783 remote_buffer_add_int (&p
, &left
, len
);
10784 remote_buffer_add_string (&p
, &left
, ",");
10786 remote_buffer_add_int (&p
, &left
, offset
);
10788 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
10789 remote_errno
, &attachment
,
10795 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
10797 if (read_len
!= ret
)
10798 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
10803 /* Serve pread from the readahead cache. Returns number of bytes
10804 read, or 0 if the request can't be served from the cache. */
10807 remote_hostio_pread_from_cache (struct remote_state
*rs
,
10808 int fd
, gdb_byte
*read_buf
, size_t len
,
10811 struct readahead_cache
*cache
= &rs
->readahead_cache
;
10813 if (cache
->fd
== fd
10814 && cache
->offset
<= offset
10815 && offset
< cache
->offset
+ cache
->bufsize
)
10817 ULONGEST max
= cache
->offset
+ cache
->bufsize
;
10819 if (offset
+ len
> max
)
10820 len
= max
- offset
;
10822 memcpy (read_buf
, cache
->buf
+ offset
- cache
->offset
, len
);
10829 /* Implementation of to_fileio_pread. */
10832 remote_hostio_pread (struct target_ops
*self
,
10833 int fd
, gdb_byte
*read_buf
, int len
,
10834 ULONGEST offset
, int *remote_errno
)
10837 struct remote_state
*rs
= get_remote_state ();
10838 struct readahead_cache
*cache
= &rs
->readahead_cache
;
10840 ret
= remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
10843 cache
->hit_count
++;
10846 fprintf_unfiltered (gdb_stdlog
, "readahead cache hit %s\n",
10847 pulongest (cache
->hit_count
));
10851 cache
->miss_count
++;
10853 fprintf_unfiltered (gdb_stdlog
, "readahead cache miss %s\n",
10854 pulongest (cache
->miss_count
));
10857 cache
->offset
= offset
;
10858 cache
->bufsize
= get_remote_packet_size ();
10859 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
10861 ret
= remote_hostio_pread_vFile (self
, cache
->fd
, cache
->buf
, cache
->bufsize
,
10862 cache
->offset
, remote_errno
);
10865 readahead_cache_invalidate_fd (fd
);
10869 cache
->bufsize
= ret
;
10870 return remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
10873 /* Implementation of to_fileio_close. */
10876 remote_hostio_close (struct target_ops
*self
, int fd
, int *remote_errno
)
10878 struct remote_state
*rs
= get_remote_state ();
10880 int left
= get_remote_packet_size () - 1;
10882 readahead_cache_invalidate_fd (fd
);
10884 remote_buffer_add_string (&p
, &left
, "vFile:close:");
10886 remote_buffer_add_int (&p
, &left
, fd
);
10888 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
10889 remote_errno
, NULL
, NULL
);
10892 /* Implementation of to_fileio_unlink. */
10895 remote_hostio_unlink (struct target_ops
*self
,
10896 struct inferior
*inf
, const char *filename
,
10899 struct remote_state
*rs
= get_remote_state ();
10901 int left
= get_remote_packet_size () - 1;
10903 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
10906 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
10908 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
10909 strlen (filename
));
10911 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
10912 remote_errno
, NULL
, NULL
);
10915 /* Implementation of to_fileio_readlink. */
10918 remote_hostio_readlink (struct target_ops
*self
,
10919 struct inferior
*inf
, const char *filename
,
10922 struct remote_state
*rs
= get_remote_state ();
10925 int left
= get_remote_packet_size ();
10926 int len
, attachment_len
;
10930 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
10933 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
10935 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
10936 strlen (filename
));
10938 len
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_readlink
,
10939 remote_errno
, &attachment
,
10945 ret
= (char *) xmalloc (len
+ 1);
10947 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
10948 (gdb_byte
*) ret
, len
);
10949 if (read_len
!= len
)
10950 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
10956 /* Implementation of to_fileio_fstat. */
10959 remote_hostio_fstat (struct target_ops
*self
,
10960 int fd
, struct stat
*st
,
10963 struct remote_state
*rs
= get_remote_state ();
10965 int left
= get_remote_packet_size ();
10966 int attachment_len
, ret
;
10968 struct fio_stat fst
;
10971 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
10973 remote_buffer_add_int (&p
, &left
, fd
);
10975 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_fstat
,
10976 remote_errno
, &attachment
,
10980 if (*remote_errno
!= FILEIO_ENOSYS
)
10983 /* Strictly we should return -1, ENOSYS here, but when
10984 "set sysroot remote:" was implemented in August 2008
10985 BFD's need for a stat function was sidestepped with
10986 this hack. This was not remedied until March 2015
10987 so we retain the previous behavior to avoid breaking
10990 Note that the memset is a March 2015 addition; older
10991 GDBs set st_size *and nothing else* so the structure
10992 would have garbage in all other fields. This might
10993 break something but retaining the previous behavior
10994 here would be just too wrong. */
10996 memset (st
, 0, sizeof (struct stat
));
10997 st
->st_size
= INT_MAX
;
11001 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11002 (gdb_byte
*) &fst
, sizeof (fst
));
11004 if (read_len
!= ret
)
11005 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
11007 if (read_len
!= sizeof (fst
))
11008 error (_("vFile:fstat returned %d bytes, but expecting %d."),
11009 read_len
, (int) sizeof (fst
));
11011 remote_fileio_to_host_stat (&fst
, st
);
11016 /* Implementation of to_filesystem_is_local. */
11019 remote_filesystem_is_local (struct target_ops
*self
)
11021 /* Valgrind GDB presents itself as a remote target but works
11022 on the local filesystem: it does not implement remote get
11023 and users are not expected to set a sysroot. To handle
11024 this case we treat the remote filesystem as local if the
11025 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
11026 does not support vFile:open. */
11027 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
11029 enum packet_support ps
= packet_support (PACKET_vFile_open
);
11031 if (ps
== PACKET_SUPPORT_UNKNOWN
)
11033 int fd
, remote_errno
;
11035 /* Try opening a file to probe support. The supplied
11036 filename is irrelevant, we only care about whether
11037 the stub recognizes the packet or not. */
11038 fd
= remote_hostio_open (self
, NULL
, "just probing",
11039 FILEIO_O_RDONLY
, 0700, 0,
11043 remote_hostio_close (self
, fd
, &remote_errno
);
11045 ps
= packet_support (PACKET_vFile_open
);
11048 if (ps
== PACKET_DISABLE
)
11050 static int warning_issued
= 0;
11052 if (!warning_issued
)
11054 warning (_("remote target does not support file"
11055 " transfer, attempting to access files"
11056 " from local filesystem."));
11057 warning_issued
= 1;
11068 remote_fileio_errno_to_host (int errnum
)
11074 case FILEIO_ENOENT
:
11082 case FILEIO_EACCES
:
11084 case FILEIO_EFAULT
:
11088 case FILEIO_EEXIST
:
11090 case FILEIO_ENODEV
:
11092 case FILEIO_ENOTDIR
:
11094 case FILEIO_EISDIR
:
11096 case FILEIO_EINVAL
:
11098 case FILEIO_ENFILE
:
11100 case FILEIO_EMFILE
:
11104 case FILEIO_ENOSPC
:
11106 case FILEIO_ESPIPE
:
11110 case FILEIO_ENOSYS
:
11112 case FILEIO_ENAMETOOLONG
:
11113 return ENAMETOOLONG
;
11119 remote_hostio_error (int errnum
)
11121 int host_error
= remote_fileio_errno_to_host (errnum
);
11123 if (host_error
== -1)
11124 error (_("Unknown remote I/O error %d"), errnum
);
11126 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
11130 remote_hostio_close_cleanup (void *opaque
)
11132 int fd
= *(int *) opaque
;
11135 remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
);
11139 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
11141 struct cleanup
*back_to
, *close_cleanup
;
11142 int retcode
, fd
, remote_errno
, bytes
, io_size
;
11145 int bytes_in_buffer
;
11148 struct remote_state
*rs
= get_remote_state ();
11150 if (!rs
->remote_desc
)
11151 error (_("command can only be used with remote target"));
11153 file
= gdb_fopen_cloexec (local_file
, "rb");
11155 perror_with_name (local_file
);
11156 back_to
= make_cleanup_fclose (file
);
11158 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
11159 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
11161 0700, 0, &remote_errno
);
11163 remote_hostio_error (remote_errno
);
11165 /* Send up to this many bytes at once. They won't all fit in the
11166 remote packet limit, so we'll transfer slightly fewer. */
11167 io_size
= get_remote_packet_size ();
11168 buffer
= (gdb_byte
*) xmalloc (io_size
);
11169 make_cleanup (xfree
, buffer
);
11171 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
11173 bytes_in_buffer
= 0;
11176 while (bytes_in_buffer
|| !saw_eof
)
11180 bytes
= fread (buffer
+ bytes_in_buffer
, 1,
11181 io_size
- bytes_in_buffer
,
11186 error (_("Error reading %s."), local_file
);
11189 /* EOF. Unless there is something still in the
11190 buffer from the last iteration, we are done. */
11192 if (bytes_in_buffer
== 0)
11200 bytes
+= bytes_in_buffer
;
11201 bytes_in_buffer
= 0;
11203 retcode
= remote_hostio_pwrite (find_target_at (process_stratum
),
11205 offset
, &remote_errno
);
11208 remote_hostio_error (remote_errno
);
11209 else if (retcode
== 0)
11210 error (_("Remote write of %d bytes returned 0!"), bytes
);
11211 else if (retcode
< bytes
)
11213 /* Short write. Save the rest of the read data for the next
11215 bytes_in_buffer
= bytes
- retcode
;
11216 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
11222 discard_cleanups (close_cleanup
);
11223 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
11224 remote_hostio_error (remote_errno
);
11227 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
11228 do_cleanups (back_to
);
11232 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
11234 struct cleanup
*back_to
, *close_cleanup
;
11235 int fd
, remote_errno
, bytes
, io_size
;
11239 struct remote_state
*rs
= get_remote_state ();
11241 if (!rs
->remote_desc
)
11242 error (_("command can only be used with remote target"));
11244 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
11245 remote_file
, FILEIO_O_RDONLY
, 0, 0,
11248 remote_hostio_error (remote_errno
);
11250 file
= gdb_fopen_cloexec (local_file
, "wb");
11252 perror_with_name (local_file
);
11253 back_to
= make_cleanup_fclose (file
);
11255 /* Send up to this many bytes at once. They won't all fit in the
11256 remote packet limit, so we'll transfer slightly fewer. */
11257 io_size
= get_remote_packet_size ();
11258 buffer
= (gdb_byte
*) xmalloc (io_size
);
11259 make_cleanup (xfree
, buffer
);
11261 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
11266 bytes
= remote_hostio_pread (find_target_at (process_stratum
),
11267 fd
, buffer
, io_size
, offset
, &remote_errno
);
11269 /* Success, but no bytes, means end-of-file. */
11272 remote_hostio_error (remote_errno
);
11276 bytes
= fwrite (buffer
, 1, bytes
, file
);
11278 perror_with_name (local_file
);
11281 discard_cleanups (close_cleanup
);
11282 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
11283 remote_hostio_error (remote_errno
);
11286 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
11287 do_cleanups (back_to
);
11291 remote_file_delete (const char *remote_file
, int from_tty
)
11293 int retcode
, remote_errno
;
11294 struct remote_state
*rs
= get_remote_state ();
11296 if (!rs
->remote_desc
)
11297 error (_("command can only be used with remote target"));
11299 retcode
= remote_hostio_unlink (find_target_at (process_stratum
),
11300 NULL
, remote_file
, &remote_errno
);
11302 remote_hostio_error (remote_errno
);
11305 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
11309 remote_put_command (char *args
, int from_tty
)
11311 struct cleanup
*back_to
;
11315 error_no_arg (_("file to put"));
11317 argv
= gdb_buildargv (args
);
11318 back_to
= make_cleanup_freeargv (argv
);
11319 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
11320 error (_("Invalid parameters to remote put"));
11322 remote_file_put (argv
[0], argv
[1], from_tty
);
11324 do_cleanups (back_to
);
11328 remote_get_command (char *args
, int from_tty
)
11330 struct cleanup
*back_to
;
11334 error_no_arg (_("file to get"));
11336 argv
= gdb_buildargv (args
);
11337 back_to
= make_cleanup_freeargv (argv
);
11338 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
11339 error (_("Invalid parameters to remote get"));
11341 remote_file_get (argv
[0], argv
[1], from_tty
);
11343 do_cleanups (back_to
);
11347 remote_delete_command (char *args
, int from_tty
)
11349 struct cleanup
*back_to
;
11353 error_no_arg (_("file to delete"));
11355 argv
= gdb_buildargv (args
);
11356 back_to
= make_cleanup_freeargv (argv
);
11357 if (argv
[0] == NULL
|| argv
[1] != NULL
)
11358 error (_("Invalid parameters to remote delete"));
11360 remote_file_delete (argv
[0], from_tty
);
11362 do_cleanups (back_to
);
11366 remote_command (char *args
, int from_tty
)
11368 help_list (remote_cmdlist
, "remote ", all_commands
, gdb_stdout
);
11372 remote_can_execute_reverse (struct target_ops
*self
)
11374 if (packet_support (PACKET_bs
) == PACKET_ENABLE
11375 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
11382 remote_supports_non_stop (struct target_ops
*self
)
11388 remote_supports_disable_randomization (struct target_ops
*self
)
11390 /* Only supported in extended mode. */
11395 remote_supports_multi_process (struct target_ops
*self
)
11397 struct remote_state
*rs
= get_remote_state ();
11399 /* Only extended-remote handles being attached to multiple
11400 processes, even though plain remote can use the multi-process
11401 thread id extensions, so that GDB knows the target process's
11403 return rs
->extended
&& remote_multi_process_p (rs
);
11407 remote_supports_cond_tracepoints (void)
11409 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
11413 remote_supports_cond_breakpoints (struct target_ops
*self
)
11415 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
11419 remote_supports_fast_tracepoints (void)
11421 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
11425 remote_supports_static_tracepoints (void)
11427 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
11431 remote_supports_install_in_trace (void)
11433 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
11437 remote_supports_enable_disable_tracepoint (struct target_ops
*self
)
11439 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
11444 remote_supports_string_tracing (struct target_ops
*self
)
11446 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
11450 remote_can_run_breakpoint_commands (struct target_ops
*self
)
11452 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
11456 remote_trace_init (struct target_ops
*self
)
11459 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
11460 if (strcmp (target_buf
, "OK") != 0)
11461 error (_("Target does not support this command."));
11464 static void free_actions_list (char **actions_list
);
11465 static void free_actions_list_cleanup_wrapper (void *);
11467 free_actions_list_cleanup_wrapper (void *al
)
11469 free_actions_list ((char **) al
);
11473 free_actions_list (char **actions_list
)
11477 if (actions_list
== 0)
11480 for (ndx
= 0; actions_list
[ndx
]; ndx
++)
11481 xfree (actions_list
[ndx
]);
11483 xfree (actions_list
);
11486 /* Recursive routine to walk through command list including loops, and
11487 download packets for each command. */
11490 remote_download_command_source (int num
, ULONGEST addr
,
11491 struct command_line
*cmds
)
11493 struct remote_state
*rs
= get_remote_state ();
11494 struct command_line
*cmd
;
11496 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
11498 QUIT
; /* Allow user to bail out with ^C. */
11499 strcpy (rs
->buf
, "QTDPsrc:");
11500 encode_source_string (num
, addr
, "cmd", cmd
->line
,
11501 rs
->buf
+ strlen (rs
->buf
),
11502 rs
->buf_size
- strlen (rs
->buf
));
11504 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
11505 if (strcmp (target_buf
, "OK"))
11506 warning (_("Target does not support source download."));
11508 if (cmd
->control_type
== while_control
11509 || cmd
->control_type
== while_stepping_control
)
11511 remote_download_command_source (num
, addr
, *cmd
->body_list
);
11513 QUIT
; /* Allow user to bail out with ^C. */
11514 strcpy (rs
->buf
, "QTDPsrc:");
11515 encode_source_string (num
, addr
, "cmd", "end",
11516 rs
->buf
+ strlen (rs
->buf
),
11517 rs
->buf_size
- strlen (rs
->buf
));
11519 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
11520 if (strcmp (target_buf
, "OK"))
11521 warning (_("Target does not support source download."));
11527 remote_download_tracepoint (struct target_ops
*self
, struct bp_location
*loc
)
11529 #define BUF_SIZE 2048
11533 char buf
[BUF_SIZE
];
11534 char **tdp_actions
;
11535 char **stepping_actions
;
11537 struct cleanup
*old_chain
= NULL
;
11538 struct agent_expr
*aexpr
;
11539 struct cleanup
*aexpr_chain
= NULL
;
11541 struct breakpoint
*b
= loc
->owner
;
11542 struct tracepoint
*t
= (struct tracepoint
*) b
;
11544 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
11545 old_chain
= make_cleanup (free_actions_list_cleanup_wrapper
,
11547 (void) make_cleanup (free_actions_list_cleanup_wrapper
,
11550 tpaddr
= loc
->address
;
11551 sprintf_vma (addrbuf
, tpaddr
);
11552 xsnprintf (buf
, BUF_SIZE
, "QTDP:%x:%s:%c:%lx:%x", b
->number
,
11553 addrbuf
, /* address */
11554 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
11555 t
->step_count
, t
->pass_count
);
11556 /* Fast tracepoints are mostly handled by the target, but we can
11557 tell the target how big of an instruction block should be moved
11559 if (b
->type
== bp_fast_tracepoint
)
11561 /* Only test for support at download time; we may not know
11562 target capabilities at definition time. */
11563 if (remote_supports_fast_tracepoints ())
11565 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
11567 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":F%x",
11568 gdb_insn_length (loc
->gdbarch
, tpaddr
));
11570 /* If it passed validation at definition but fails now,
11571 something is very wrong. */
11572 internal_error (__FILE__
, __LINE__
,
11573 _("Fast tracepoint not "
11574 "valid during download"));
11577 /* Fast tracepoints are functionally identical to regular
11578 tracepoints, so don't take lack of support as a reason to
11579 give up on the trace run. */
11580 warning (_("Target does not support fast tracepoints, "
11581 "downloading %d as regular tracepoint"), b
->number
);
11583 else if (b
->type
== bp_static_tracepoint
)
11585 /* Only test for support at download time; we may not know
11586 target capabilities at definition time. */
11587 if (remote_supports_static_tracepoints ())
11589 struct static_tracepoint_marker marker
;
11591 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
11592 strcat (buf
, ":S");
11594 error (_("Static tracepoint not valid during download"));
11597 /* Fast tracepoints are functionally identical to regular
11598 tracepoints, so don't take lack of support as a reason
11599 to give up on the trace run. */
11600 error (_("Target does not support static tracepoints"));
11602 /* If the tracepoint has a conditional, make it into an agent
11603 expression and append to the definition. */
11606 /* Only test support at download time, we may not know target
11607 capabilities at definition time. */
11608 if (remote_supports_cond_tracepoints ())
11610 aexpr
= gen_eval_for_expr (tpaddr
, loc
->cond
);
11611 aexpr_chain
= make_cleanup_free_agent_expr (aexpr
);
11612 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":X%x,",
11614 pkt
= buf
+ strlen (buf
);
11615 for (ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
11616 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
11618 do_cleanups (aexpr_chain
);
11621 warning (_("Target does not support conditional tracepoints, "
11622 "ignoring tp %d cond"), b
->number
);
11625 if (b
->commands
|| *default_collect
)
11628 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
11629 if (strcmp (target_buf
, "OK"))
11630 error (_("Target does not support tracepoints."));
11632 /* do_single_steps (t); */
11635 for (ndx
= 0; tdp_actions
[ndx
]; ndx
++)
11637 QUIT
; /* Allow user to bail out with ^C. */
11638 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%c",
11639 b
->number
, addrbuf
, /* address */
11641 ((tdp_actions
[ndx
+ 1] || stepping_actions
)
11644 remote_get_noisy_reply (&target_buf
,
11646 if (strcmp (target_buf
, "OK"))
11647 error (_("Error on target while setting tracepoints."));
11650 if (stepping_actions
)
11652 for (ndx
= 0; stepping_actions
[ndx
]; ndx
++)
11654 QUIT
; /* Allow user to bail out with ^C. */
11655 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%s%s",
11656 b
->number
, addrbuf
, /* address */
11657 ((ndx
== 0) ? "S" : ""),
11658 stepping_actions
[ndx
],
11659 (stepping_actions
[ndx
+ 1] ? "-" : ""));
11661 remote_get_noisy_reply (&target_buf
,
11663 if (strcmp (target_buf
, "OK"))
11664 error (_("Error on target while setting tracepoints."));
11668 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
11670 if (b
->location
!= NULL
)
11672 strcpy (buf
, "QTDPsrc:");
11673 encode_source_string (b
->number
, loc
->address
, "at",
11674 event_location_to_string (b
->location
),
11675 buf
+ strlen (buf
), 2048 - strlen (buf
));
11677 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
11678 if (strcmp (target_buf
, "OK"))
11679 warning (_("Target does not support source download."));
11681 if (b
->cond_string
)
11683 strcpy (buf
, "QTDPsrc:");
11684 encode_source_string (b
->number
, loc
->address
,
11685 "cond", b
->cond_string
, buf
+ strlen (buf
),
11686 2048 - strlen (buf
));
11688 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
11689 if (strcmp (target_buf
, "OK"))
11690 warning (_("Target does not support source download."));
11692 remote_download_command_source (b
->number
, loc
->address
,
11693 breakpoint_commands (b
));
11696 do_cleanups (old_chain
);
11700 remote_can_download_tracepoint (struct target_ops
*self
)
11702 struct remote_state
*rs
= get_remote_state ();
11703 struct trace_status
*ts
;
11706 /* Don't try to install tracepoints until we've relocated our
11707 symbols, and fetched and merged the target's tracepoint list with
11709 if (rs
->starting_up
)
11712 ts
= current_trace_status ();
11713 status
= remote_get_trace_status (self
, ts
);
11715 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
11718 /* If we are in a tracing experiment, but remote stub doesn't support
11719 installing tracepoint in trace, we have to return. */
11720 if (!remote_supports_install_in_trace ())
11728 remote_download_trace_state_variable (struct target_ops
*self
,
11729 struct trace_state_variable
*tsv
)
11731 struct remote_state
*rs
= get_remote_state ();
11734 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDV:%x:%s:%x:",
11735 tsv
->number
, phex ((ULONGEST
) tsv
->initial_value
, 8),
11737 p
= rs
->buf
+ strlen (rs
->buf
);
11738 if ((p
- rs
->buf
) + strlen (tsv
->name
) * 2 >= get_remote_packet_size ())
11739 error (_("Trace state variable name too long for tsv definition packet"));
11740 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
->name
), p
, strlen (tsv
->name
));
11743 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
11744 if (*target_buf
== '\0')
11745 error (_("Target does not support this command."));
11746 if (strcmp (target_buf
, "OK") != 0)
11747 error (_("Error on target while downloading trace state variable."));
11751 remote_enable_tracepoint (struct target_ops
*self
,
11752 struct bp_location
*location
)
11754 struct remote_state
*rs
= get_remote_state ();
11757 sprintf_vma (addr_buf
, location
->address
);
11758 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTEnable:%x:%s",
11759 location
->owner
->number
, addr_buf
);
11761 remote_get_noisy_reply (&rs
->buf
, &rs
->buf_size
);
11762 if (*rs
->buf
== '\0')
11763 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
11764 if (strcmp (rs
->buf
, "OK") != 0)
11765 error (_("Error on target while enabling tracepoint."));
11769 remote_disable_tracepoint (struct target_ops
*self
,
11770 struct bp_location
*location
)
11772 struct remote_state
*rs
= get_remote_state ();
11775 sprintf_vma (addr_buf
, location
->address
);
11776 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisable:%x:%s",
11777 location
->owner
->number
, addr_buf
);
11779 remote_get_noisy_reply (&rs
->buf
, &rs
->buf_size
);
11780 if (*rs
->buf
== '\0')
11781 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
11782 if (strcmp (rs
->buf
, "OK") != 0)
11783 error (_("Error on target while disabling tracepoint."));
11787 remote_trace_set_readonly_regions (struct target_ops
*self
)
11791 bfd_size_type size
;
11797 return; /* No information to give. */
11799 strcpy (target_buf
, "QTro");
11800 offset
= strlen (target_buf
);
11801 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
11803 char tmp1
[40], tmp2
[40];
11806 if ((s
->flags
& SEC_LOAD
) == 0 ||
11807 /* (s->flags & SEC_CODE) == 0 || */
11808 (s
->flags
& SEC_READONLY
) == 0)
11812 vma
= bfd_get_section_vma (abfd
, s
);
11813 size
= bfd_get_section_size (s
);
11814 sprintf_vma (tmp1
, vma
);
11815 sprintf_vma (tmp2
, vma
+ size
);
11816 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
11817 if (offset
+ sec_length
+ 1 > target_buf_size
)
11819 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
11821 Too many sections for read-only sections definition packet."));
11824 xsnprintf (target_buf
+ offset
, target_buf_size
- offset
, ":%s,%s",
11826 offset
+= sec_length
;
11830 putpkt (target_buf
);
11831 getpkt (&target_buf
, &target_buf_size
, 0);
11836 remote_trace_start (struct target_ops
*self
)
11838 putpkt ("QTStart");
11839 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
11840 if (*target_buf
== '\0')
11841 error (_("Target does not support this command."));
11842 if (strcmp (target_buf
, "OK") != 0)
11843 error (_("Bogus reply from target: %s"), target_buf
);
11847 remote_get_trace_status (struct target_ops
*self
, struct trace_status
*ts
)
11849 /* Initialize it just to avoid a GCC false warning. */
11851 /* FIXME we need to get register block size some other way. */
11852 extern int trace_regblock_size
;
11853 enum packet_result result
;
11855 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
11858 trace_regblock_size
= get_remote_arch_state ()->sizeof_g_packet
;
11860 putpkt ("qTStatus");
11864 p
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
11866 CATCH (ex
, RETURN_MASK_ERROR
)
11868 if (ex
.error
!= TARGET_CLOSE_ERROR
)
11870 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
11873 throw_exception (ex
);
11877 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
11879 /* If the remote target doesn't do tracing, flag it. */
11880 if (result
== PACKET_UNKNOWN
)
11883 /* We're working with a live target. */
11884 ts
->filename
= NULL
;
11887 error (_("Bogus trace status reply from target: %s"), target_buf
);
11889 /* Function 'parse_trace_status' sets default value of each field of
11890 'ts' at first, so we don't have to do it here. */
11891 parse_trace_status (p
, ts
);
11893 return ts
->running
;
11897 remote_get_tracepoint_status (struct target_ops
*self
, struct breakpoint
*bp
,
11898 struct uploaded_tp
*utp
)
11900 struct remote_state
*rs
= get_remote_state ();
11902 struct bp_location
*loc
;
11903 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
11904 size_t size
= get_remote_packet_size ();
11908 tp
->base
.hit_count
= 0;
11909 tp
->traceframe_usage
= 0;
11910 for (loc
= tp
->base
.loc
; loc
; loc
= loc
->next
)
11912 /* If the tracepoint was never downloaded, don't go asking for
11914 if (tp
->number_on_target
== 0)
11916 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", tp
->number_on_target
,
11917 phex_nz (loc
->address
, 0));
11919 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
11920 if (reply
&& *reply
)
11923 parse_tracepoint_status (reply
+ 1, bp
, utp
);
11929 utp
->hit_count
= 0;
11930 utp
->traceframe_usage
= 0;
11931 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", utp
->number
,
11932 phex_nz (utp
->addr
, 0));
11934 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
11935 if (reply
&& *reply
)
11938 parse_tracepoint_status (reply
+ 1, bp
, utp
);
11944 remote_trace_stop (struct target_ops
*self
)
11947 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
11948 if (*target_buf
== '\0')
11949 error (_("Target does not support this command."));
11950 if (strcmp (target_buf
, "OK") != 0)
11951 error (_("Bogus reply from target: %s"), target_buf
);
11955 remote_trace_find (struct target_ops
*self
,
11956 enum trace_find_type type
, int num
,
11957 CORE_ADDR addr1
, CORE_ADDR addr2
,
11960 struct remote_state
*rs
= get_remote_state ();
11961 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
11963 int target_frameno
= -1, target_tracept
= -1;
11965 /* Lookups other than by absolute frame number depend on the current
11966 trace selected, so make sure it is correct on the remote end
11968 if (type
!= tfind_number
)
11969 set_remote_traceframe ();
11972 strcpy (p
, "QTFrame:");
11973 p
= strchr (p
, '\0');
11977 xsnprintf (p
, endbuf
- p
, "%x", num
);
11980 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
11983 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
11986 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
11987 phex_nz (addr2
, 0));
11989 case tfind_outside
:
11990 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
11991 phex_nz (addr2
, 0));
11994 error (_("Unknown trace find type %d"), type
);
11998 reply
= remote_get_noisy_reply (&(rs
->buf
), &rs
->buf_size
);
11999 if (*reply
== '\0')
12000 error (_("Target does not support this command."));
12002 while (reply
&& *reply
)
12007 target_frameno
= (int) strtol (p
, &reply
, 16);
12009 error (_("Unable to parse trace frame number"));
12010 /* Don't update our remote traceframe number cache on failure
12011 to select a remote traceframe. */
12012 if (target_frameno
== -1)
12017 target_tracept
= (int) strtol (p
, &reply
, 16);
12019 error (_("Unable to parse tracepoint number"));
12021 case 'O': /* "OK"? */
12022 if (reply
[1] == 'K' && reply
[2] == '\0')
12025 error (_("Bogus reply from target: %s"), reply
);
12028 error (_("Bogus reply from target: %s"), reply
);
12031 *tpp
= target_tracept
;
12033 rs
->remote_traceframe_number
= target_frameno
;
12034 return target_frameno
;
12038 remote_get_trace_state_variable_value (struct target_ops
*self
,
12039 int tsvnum
, LONGEST
*val
)
12041 struct remote_state
*rs
= get_remote_state ();
12045 set_remote_traceframe ();
12047 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTV:%x", tsvnum
);
12049 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12050 if (reply
&& *reply
)
12054 unpack_varlen_hex (reply
+ 1, &uval
);
12055 *val
= (LONGEST
) uval
;
12063 remote_save_trace_data (struct target_ops
*self
, const char *filename
)
12065 struct remote_state
*rs
= get_remote_state ();
12069 strcpy (p
, "QTSave:");
12071 if ((p
- rs
->buf
) + strlen (filename
) * 2 >= get_remote_packet_size ())
12072 error (_("Remote file name too long for trace save packet"));
12073 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
12076 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12077 if (*reply
== '\0')
12078 error (_("Target does not support this command."));
12079 if (strcmp (reply
, "OK") != 0)
12080 error (_("Bogus reply from target: %s"), reply
);
12084 /* This is basically a memory transfer, but needs to be its own packet
12085 because we don't know how the target actually organizes its trace
12086 memory, plus we want to be able to ask for as much as possible, but
12087 not be unhappy if we don't get as much as we ask for. */
12090 remote_get_raw_trace_data (struct target_ops
*self
,
12091 gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
12093 struct remote_state
*rs
= get_remote_state ();
12099 strcpy (p
, "qTBuffer:");
12101 p
+= hexnumstr (p
, offset
);
12103 p
+= hexnumstr (p
, len
);
12107 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12108 if (reply
&& *reply
)
12110 /* 'l' by itself means we're at the end of the buffer and
12111 there is nothing more to get. */
12115 /* Convert the reply into binary. Limit the number of bytes to
12116 convert according to our passed-in buffer size, rather than
12117 what was returned in the packet; if the target is
12118 unexpectedly generous and gives us a bigger reply than we
12119 asked for, we don't want to crash. */
12120 rslt
= hex2bin (target_buf
, buf
, len
);
12124 /* Something went wrong, flag as an error. */
12129 remote_set_disconnected_tracing (struct target_ops
*self
, int val
)
12131 struct remote_state
*rs
= get_remote_state ();
12133 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
12137 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisconnected:%x", val
);
12139 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12140 if (*reply
== '\0')
12141 error (_("Target does not support this command."));
12142 if (strcmp (reply
, "OK") != 0)
12143 error (_("Bogus reply from target: %s"), reply
);
12146 warning (_("Target does not support disconnected tracing."));
12150 remote_core_of_thread (struct target_ops
*ops
, ptid_t ptid
)
12152 struct thread_info
*info
= find_thread_ptid (ptid
);
12154 if (info
&& info
->priv
)
12155 return info
->priv
->core
;
12160 remote_set_circular_trace_buffer (struct target_ops
*self
, int val
)
12162 struct remote_state
*rs
= get_remote_state ();
12165 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTBuffer:circular:%x", val
);
12167 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12168 if (*reply
== '\0')
12169 error (_("Target does not support this command."));
12170 if (strcmp (reply
, "OK") != 0)
12171 error (_("Bogus reply from target: %s"), reply
);
12174 static struct traceframe_info
*
12175 remote_traceframe_info (struct target_ops
*self
)
12179 text
= target_read_stralloc (¤t_target
,
12180 TARGET_OBJECT_TRACEFRAME_INFO
, NULL
);
12183 struct traceframe_info
*info
;
12184 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
12186 info
= parse_traceframe_info (text
);
12187 do_cleanups (back_to
);
12194 /* Handle the qTMinFTPILen packet. Returns the minimum length of
12195 instruction on which a fast tracepoint may be placed. Returns -1
12196 if the packet is not supported, and 0 if the minimum instruction
12197 length is unknown. */
12200 remote_get_min_fast_tracepoint_insn_len (struct target_ops
*self
)
12202 struct remote_state
*rs
= get_remote_state ();
12205 /* If we're not debugging a process yet, the IPA can't be
12207 if (!target_has_execution
)
12210 /* Make sure the remote is pointing at the right process. */
12211 set_general_process ();
12213 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTMinFTPILen");
12215 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12216 if (*reply
== '\0')
12220 ULONGEST min_insn_len
;
12222 unpack_varlen_hex (reply
, &min_insn_len
);
12224 return (int) min_insn_len
;
12229 remote_set_trace_buffer_size (struct target_ops
*self
, LONGEST val
)
12231 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
12233 struct remote_state
*rs
= get_remote_state ();
12234 char *buf
= rs
->buf
;
12235 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12236 enum packet_result result
;
12238 gdb_assert (val
>= 0 || val
== -1);
12239 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
12240 /* Send -1 as literal "-1" to avoid host size dependency. */
12244 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
12247 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
12250 remote_get_noisy_reply (&rs
->buf
, &rs
->buf_size
);
12251 result
= packet_ok (rs
->buf
,
12252 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
12254 if (result
!= PACKET_OK
)
12255 warning (_("Bogus reply from target: %s"), rs
->buf
);
12260 remote_set_trace_notes (struct target_ops
*self
,
12261 const char *user
, const char *notes
,
12262 const char *stop_notes
)
12264 struct remote_state
*rs
= get_remote_state ();
12266 char *buf
= rs
->buf
;
12267 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12270 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
12273 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
12274 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
12280 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
12281 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
12287 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
12288 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
12292 /* Ensure the buffer is terminated. */
12296 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12297 if (*reply
== '\0')
12300 if (strcmp (reply
, "OK") != 0)
12301 error (_("Bogus reply from target: %s"), reply
);
12307 remote_use_agent (struct target_ops
*self
, int use
)
12309 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
12311 struct remote_state
*rs
= get_remote_state ();
12313 /* If the stub supports QAgent. */
12314 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAgent:%d", use
);
12316 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
12318 if (strcmp (rs
->buf
, "OK") == 0)
12329 remote_can_use_agent (struct target_ops
*self
)
12331 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
12334 struct btrace_target_info
12336 /* The ptid of the traced thread. */
12339 /* The obtained branch trace configuration. */
12340 struct btrace_config conf
;
12343 /* Reset our idea of our target's btrace configuration. */
12346 remote_btrace_reset (void)
12348 struct remote_state
*rs
= get_remote_state ();
12350 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
12353 /* Check whether the target supports branch tracing. */
12356 remote_supports_btrace (struct target_ops
*self
, enum btrace_format format
)
12358 if (packet_support (PACKET_Qbtrace_off
) != PACKET_ENABLE
)
12360 if (packet_support (PACKET_qXfer_btrace
) != PACKET_ENABLE
)
12365 case BTRACE_FORMAT_NONE
:
12368 case BTRACE_FORMAT_BTS
:
12369 return (packet_support (PACKET_Qbtrace_bts
) == PACKET_ENABLE
);
12371 case BTRACE_FORMAT_PT
:
12372 /* The trace is decoded on the host. Even if our target supports it,
12373 we still need to have libipt to decode the trace. */
12374 #if defined (HAVE_LIBIPT)
12375 return (packet_support (PACKET_Qbtrace_pt
) == PACKET_ENABLE
);
12376 #else /* !defined (HAVE_LIBIPT) */
12378 #endif /* !defined (HAVE_LIBIPT) */
12381 internal_error (__FILE__
, __LINE__
, _("Unknown branch trace format"));
12384 /* Synchronize the configuration with the target. */
12387 btrace_sync_conf (const struct btrace_config
*conf
)
12389 struct packet_config
*packet
;
12390 struct remote_state
*rs
;
12391 char *buf
, *pos
, *endbuf
;
12393 rs
= get_remote_state ();
12395 endbuf
= buf
+ get_remote_packet_size ();
12397 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
12398 if (packet_config_support (packet
) == PACKET_ENABLE
12399 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
12402 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
12406 getpkt (&buf
, &rs
->buf_size
, 0);
12408 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
12410 if (buf
[0] == 'E' && buf
[1] == '.')
12411 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
12413 error (_("Failed to configure the BTS buffer size."));
12416 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
12419 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
12420 if (packet_config_support (packet
) == PACKET_ENABLE
12421 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
12424 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
12428 getpkt (&buf
, &rs
->buf_size
, 0);
12430 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
12432 if (buf
[0] == 'E' && buf
[1] == '.')
12433 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
12435 error (_("Failed to configure the trace buffer size."));
12438 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
12442 /* Read the current thread's btrace configuration from the target and
12443 store it into CONF. */
12446 btrace_read_config (struct btrace_config
*conf
)
12450 xml
= target_read_stralloc (¤t_target
,
12451 TARGET_OBJECT_BTRACE_CONF
, "");
12454 struct cleanup
*cleanup
;
12456 cleanup
= make_cleanup (xfree
, xml
);
12457 parse_xml_btrace_conf (conf
, xml
);
12458 do_cleanups (cleanup
);
12462 /* Enable branch tracing. */
12464 static struct btrace_target_info
*
12465 remote_enable_btrace (struct target_ops
*self
, ptid_t ptid
,
12466 const struct btrace_config
*conf
)
12468 struct btrace_target_info
*tinfo
= NULL
;
12469 struct packet_config
*packet
= NULL
;
12470 struct remote_state
*rs
= get_remote_state ();
12471 char *buf
= rs
->buf
;
12472 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12474 switch (conf
->format
)
12476 case BTRACE_FORMAT_BTS
:
12477 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
12480 case BTRACE_FORMAT_PT
:
12481 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
12485 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
12486 error (_("Target does not support branch tracing."));
12488 btrace_sync_conf (conf
);
12490 set_general_thread (ptid
);
12492 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
12494 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
12496 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
12498 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
12499 error (_("Could not enable branch tracing for %s: %s"),
12500 target_pid_to_str (ptid
), rs
->buf
+ 2);
12502 error (_("Could not enable branch tracing for %s."),
12503 target_pid_to_str (ptid
));
12506 tinfo
= XCNEW (struct btrace_target_info
);
12507 tinfo
->ptid
= ptid
;
12509 /* If we fail to read the configuration, we lose some information, but the
12510 tracing itself is not impacted. */
12513 btrace_read_config (&tinfo
->conf
);
12515 CATCH (err
, RETURN_MASK_ERROR
)
12517 if (err
.message
!= NULL
)
12518 warning ("%s", err
.message
);
12525 /* Disable branch tracing. */
12528 remote_disable_btrace (struct target_ops
*self
,
12529 struct btrace_target_info
*tinfo
)
12531 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
12532 struct remote_state
*rs
= get_remote_state ();
12533 char *buf
= rs
->buf
;
12534 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12536 if (packet_config_support (packet
) != PACKET_ENABLE
)
12537 error (_("Target does not support branch tracing."));
12539 set_general_thread (tinfo
->ptid
);
12541 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
12543 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
12545 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
12547 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
12548 error (_("Could not disable branch tracing for %s: %s"),
12549 target_pid_to_str (tinfo
->ptid
), rs
->buf
+ 2);
12551 error (_("Could not disable branch tracing for %s."),
12552 target_pid_to_str (tinfo
->ptid
));
12558 /* Teardown branch tracing. */
12561 remote_teardown_btrace (struct target_ops
*self
,
12562 struct btrace_target_info
*tinfo
)
12564 /* We must not talk to the target during teardown. */
12568 /* Read the branch trace. */
12570 static enum btrace_error
12571 remote_read_btrace (struct target_ops
*self
,
12572 struct btrace_data
*btrace
,
12573 struct btrace_target_info
*tinfo
,
12574 enum btrace_read_type type
)
12576 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
12577 struct remote_state
*rs
= get_remote_state ();
12578 struct cleanup
*cleanup
;
12582 if (packet_config_support (packet
) != PACKET_ENABLE
)
12583 error (_("Target does not support branch tracing."));
12585 #if !defined(HAVE_LIBEXPAT)
12586 error (_("Cannot process branch tracing result. XML parsing not supported."));
12591 case BTRACE_READ_ALL
:
12594 case BTRACE_READ_NEW
:
12597 case BTRACE_READ_DELTA
:
12601 internal_error (__FILE__
, __LINE__
,
12602 _("Bad branch tracing read type: %u."),
12603 (unsigned int) type
);
12606 xml
= target_read_stralloc (¤t_target
,
12607 TARGET_OBJECT_BTRACE
, annex
);
12609 return BTRACE_ERR_UNKNOWN
;
12611 cleanup
= make_cleanup (xfree
, xml
);
12612 parse_xml_btrace (btrace
, xml
);
12613 do_cleanups (cleanup
);
12615 return BTRACE_ERR_NONE
;
12618 static const struct btrace_config
*
12619 remote_btrace_conf (struct target_ops
*self
,
12620 const struct btrace_target_info
*tinfo
)
12622 return &tinfo
->conf
;
12626 remote_augmented_libraries_svr4_read (struct target_ops
*self
)
12628 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
12632 /* Implementation of to_load. */
12635 remote_load (struct target_ops
*self
, const char *name
, int from_tty
)
12637 generic_load (name
, from_tty
);
12640 /* Accepts an integer PID; returns a string representing a file that
12641 can be opened on the remote side to get the symbols for the child
12642 process. Returns NULL if the operation is not supported. */
12645 remote_pid_to_exec_file (struct target_ops
*self
, int pid
)
12647 static char *filename
= NULL
;
12648 struct inferior
*inf
;
12649 char *annex
= NULL
;
12651 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
12654 if (filename
!= NULL
)
12657 inf
= find_inferior_pid (pid
);
12659 internal_error (__FILE__
, __LINE__
,
12660 _("not currently attached to process %d"), pid
);
12662 if (!inf
->fake_pid_p
)
12664 const int annex_size
= 9;
12666 annex
= (char *) alloca (annex_size
);
12667 xsnprintf (annex
, annex_size
, "%x", pid
);
12670 filename
= target_read_stralloc (¤t_target
,
12671 TARGET_OBJECT_EXEC_FILE
, annex
);
12676 /* Implement the to_can_do_single_step target_ops method. */
12679 remote_can_do_single_step (struct target_ops
*ops
)
12681 /* We can only tell whether target supports single step or not by
12682 supported s and S vCont actions if the stub supports vContSupported
12683 feature. If the stub doesn't support vContSupported feature,
12684 we have conservatively to think target doesn't supports single
12686 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
12688 struct remote_state
*rs
= get_remote_state ();
12690 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
12691 remote_vcont_probe (rs
);
12693 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
12700 init_remote_ops (void)
12702 remote_ops
.to_shortname
= "remote";
12703 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
12704 remote_ops
.to_doc
=
12705 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
12706 Specify the serial device it is connected to\n\
12707 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
12708 remote_ops
.to_open
= remote_open
;
12709 remote_ops
.to_close
= remote_close
;
12710 remote_ops
.to_detach
= remote_detach
;
12711 remote_ops
.to_disconnect
= remote_disconnect
;
12712 remote_ops
.to_resume
= remote_resume
;
12713 remote_ops
.to_wait
= remote_wait
;
12714 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
12715 remote_ops
.to_store_registers
= remote_store_registers
;
12716 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
12717 remote_ops
.to_files_info
= remote_files_info
;
12718 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
12719 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
12720 remote_ops
.to_stopped_by_sw_breakpoint
= remote_stopped_by_sw_breakpoint
;
12721 remote_ops
.to_supports_stopped_by_sw_breakpoint
= remote_supports_stopped_by_sw_breakpoint
;
12722 remote_ops
.to_stopped_by_hw_breakpoint
= remote_stopped_by_hw_breakpoint
;
12723 remote_ops
.to_supports_stopped_by_hw_breakpoint
= remote_supports_stopped_by_hw_breakpoint
;
12724 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
12725 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
12726 remote_ops
.to_watchpoint_addr_within_range
=
12727 remote_watchpoint_addr_within_range
;
12728 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
12729 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
12730 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
12731 remote_ops
.to_region_ok_for_hw_watchpoint
12732 = remote_region_ok_for_hw_watchpoint
;
12733 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
12734 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
12735 remote_ops
.to_kill
= remote_kill
;
12736 remote_ops
.to_load
= remote_load
;
12737 remote_ops
.to_mourn_inferior
= remote_mourn
;
12738 remote_ops
.to_pass_signals
= remote_pass_signals
;
12739 remote_ops
.to_program_signals
= remote_program_signals
;
12740 remote_ops
.to_thread_alive
= remote_thread_alive
;
12741 remote_ops
.to_update_thread_list
= remote_update_thread_list
;
12742 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
12743 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
12744 remote_ops
.to_get_ada_task_ptid
= remote_get_ada_task_ptid
;
12745 remote_ops
.to_stop
= remote_stop
;
12746 remote_ops
.to_interrupt
= remote_interrupt
;
12747 remote_ops
.to_check_pending_interrupt
= remote_check_pending_interrupt
;
12748 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
12749 remote_ops
.to_rcmd
= remote_rcmd
;
12750 remote_ops
.to_pid_to_exec_file
= remote_pid_to_exec_file
;
12751 remote_ops
.to_log_command
= serial_log_command
;
12752 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
12753 remote_ops
.to_stratum
= process_stratum
;
12754 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
12755 remote_ops
.to_has_memory
= default_child_has_memory
;
12756 remote_ops
.to_has_stack
= default_child_has_stack
;
12757 remote_ops
.to_has_registers
= default_child_has_registers
;
12758 remote_ops
.to_has_execution
= default_child_has_execution
;
12759 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
12760 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
12761 remote_ops
.to_magic
= OPS_MAGIC
;
12762 remote_ops
.to_memory_map
= remote_memory_map
;
12763 remote_ops
.to_flash_erase
= remote_flash_erase
;
12764 remote_ops
.to_flash_done
= remote_flash_done
;
12765 remote_ops
.to_read_description
= remote_read_description
;
12766 remote_ops
.to_search_memory
= remote_search_memory
;
12767 remote_ops
.to_can_async_p
= remote_can_async_p
;
12768 remote_ops
.to_is_async_p
= remote_is_async_p
;
12769 remote_ops
.to_async
= remote_async
;
12770 remote_ops
.to_can_do_single_step
= remote_can_do_single_step
;
12771 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
12772 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
12773 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
12774 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
12775 remote_ops
.to_supports_disable_randomization
12776 = remote_supports_disable_randomization
;
12777 remote_ops
.to_filesystem_is_local
= remote_filesystem_is_local
;
12778 remote_ops
.to_fileio_open
= remote_hostio_open
;
12779 remote_ops
.to_fileio_pwrite
= remote_hostio_pwrite
;
12780 remote_ops
.to_fileio_pread
= remote_hostio_pread
;
12781 remote_ops
.to_fileio_fstat
= remote_hostio_fstat
;
12782 remote_ops
.to_fileio_close
= remote_hostio_close
;
12783 remote_ops
.to_fileio_unlink
= remote_hostio_unlink
;
12784 remote_ops
.to_fileio_readlink
= remote_hostio_readlink
;
12785 remote_ops
.to_supports_enable_disable_tracepoint
= remote_supports_enable_disable_tracepoint
;
12786 remote_ops
.to_supports_string_tracing
= remote_supports_string_tracing
;
12787 remote_ops
.to_supports_evaluation_of_breakpoint_conditions
= remote_supports_cond_breakpoints
;
12788 remote_ops
.to_can_run_breakpoint_commands
= remote_can_run_breakpoint_commands
;
12789 remote_ops
.to_trace_init
= remote_trace_init
;
12790 remote_ops
.to_download_tracepoint
= remote_download_tracepoint
;
12791 remote_ops
.to_can_download_tracepoint
= remote_can_download_tracepoint
;
12792 remote_ops
.to_download_trace_state_variable
12793 = remote_download_trace_state_variable
;
12794 remote_ops
.to_enable_tracepoint
= remote_enable_tracepoint
;
12795 remote_ops
.to_disable_tracepoint
= remote_disable_tracepoint
;
12796 remote_ops
.to_trace_set_readonly_regions
= remote_trace_set_readonly_regions
;
12797 remote_ops
.to_trace_start
= remote_trace_start
;
12798 remote_ops
.to_get_trace_status
= remote_get_trace_status
;
12799 remote_ops
.to_get_tracepoint_status
= remote_get_tracepoint_status
;
12800 remote_ops
.to_trace_stop
= remote_trace_stop
;
12801 remote_ops
.to_trace_find
= remote_trace_find
;
12802 remote_ops
.to_get_trace_state_variable_value
12803 = remote_get_trace_state_variable_value
;
12804 remote_ops
.to_save_trace_data
= remote_save_trace_data
;
12805 remote_ops
.to_upload_tracepoints
= remote_upload_tracepoints
;
12806 remote_ops
.to_upload_trace_state_variables
12807 = remote_upload_trace_state_variables
;
12808 remote_ops
.to_get_raw_trace_data
= remote_get_raw_trace_data
;
12809 remote_ops
.to_get_min_fast_tracepoint_insn_len
= remote_get_min_fast_tracepoint_insn_len
;
12810 remote_ops
.to_set_disconnected_tracing
= remote_set_disconnected_tracing
;
12811 remote_ops
.to_set_circular_trace_buffer
= remote_set_circular_trace_buffer
;
12812 remote_ops
.to_set_trace_buffer_size
= remote_set_trace_buffer_size
;
12813 remote_ops
.to_set_trace_notes
= remote_set_trace_notes
;
12814 remote_ops
.to_core_of_thread
= remote_core_of_thread
;
12815 remote_ops
.to_verify_memory
= remote_verify_memory
;
12816 remote_ops
.to_get_tib_address
= remote_get_tib_address
;
12817 remote_ops
.to_set_permissions
= remote_set_permissions
;
12818 remote_ops
.to_static_tracepoint_marker_at
12819 = remote_static_tracepoint_marker_at
;
12820 remote_ops
.to_static_tracepoint_markers_by_strid
12821 = remote_static_tracepoint_markers_by_strid
;
12822 remote_ops
.to_traceframe_info
= remote_traceframe_info
;
12823 remote_ops
.to_use_agent
= remote_use_agent
;
12824 remote_ops
.to_can_use_agent
= remote_can_use_agent
;
12825 remote_ops
.to_supports_btrace
= remote_supports_btrace
;
12826 remote_ops
.to_enable_btrace
= remote_enable_btrace
;
12827 remote_ops
.to_disable_btrace
= remote_disable_btrace
;
12828 remote_ops
.to_teardown_btrace
= remote_teardown_btrace
;
12829 remote_ops
.to_read_btrace
= remote_read_btrace
;
12830 remote_ops
.to_btrace_conf
= remote_btrace_conf
;
12831 remote_ops
.to_augmented_libraries_svr4_read
=
12832 remote_augmented_libraries_svr4_read
;
12835 /* Set up the extended remote vector by making a copy of the standard
12836 remote vector and adding to it. */
12839 init_extended_remote_ops (void)
12841 extended_remote_ops
= remote_ops
;
12843 extended_remote_ops
.to_shortname
= "extended-remote";
12844 extended_remote_ops
.to_longname
=
12845 "Extended remote serial target in gdb-specific protocol";
12846 extended_remote_ops
.to_doc
=
12847 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
12848 Specify the serial device it is connected to (e.g. /dev/ttya).";
12849 extended_remote_ops
.to_open
= extended_remote_open
;
12850 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
12851 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
12852 extended_remote_ops
.to_detach
= extended_remote_detach
;
12853 extended_remote_ops
.to_attach
= extended_remote_attach
;
12854 extended_remote_ops
.to_post_attach
= extended_remote_post_attach
;
12855 extended_remote_ops
.to_kill
= extended_remote_kill
;
12856 extended_remote_ops
.to_supports_disable_randomization
12857 = extended_remote_supports_disable_randomization
;
12858 extended_remote_ops
.to_follow_fork
= remote_follow_fork
;
12859 extended_remote_ops
.to_follow_exec
= remote_follow_exec
;
12860 extended_remote_ops
.to_insert_fork_catchpoint
12861 = remote_insert_fork_catchpoint
;
12862 extended_remote_ops
.to_remove_fork_catchpoint
12863 = remote_remove_fork_catchpoint
;
12864 extended_remote_ops
.to_insert_vfork_catchpoint
12865 = remote_insert_vfork_catchpoint
;
12866 extended_remote_ops
.to_remove_vfork_catchpoint
12867 = remote_remove_vfork_catchpoint
;
12868 extended_remote_ops
.to_insert_exec_catchpoint
12869 = remote_insert_exec_catchpoint
;
12870 extended_remote_ops
.to_remove_exec_catchpoint
12871 = remote_remove_exec_catchpoint
;
12875 remote_can_async_p (struct target_ops
*ops
)
12877 struct remote_state
*rs
= get_remote_state ();
12879 if (!target_async_permitted
)
12880 /* We only enable async when the user specifically asks for it. */
12883 /* We're async whenever the serial device is. */
12884 return serial_can_async_p (rs
->remote_desc
);
12888 remote_is_async_p (struct target_ops
*ops
)
12890 struct remote_state
*rs
= get_remote_state ();
12892 if (!target_async_permitted
)
12893 /* We only enable async when the user specifically asks for it. */
12896 /* We're async whenever the serial device is. */
12897 return serial_is_async_p (rs
->remote_desc
);
12900 /* Pass the SERIAL event on and up to the client. One day this code
12901 will be able to delay notifying the client of an event until the
12902 point where an entire packet has been received. */
12904 static serial_event_ftype remote_async_serial_handler
;
12907 remote_async_serial_handler (struct serial
*scb
, void *context
)
12909 struct remote_state
*rs
= (struct remote_state
*) context
;
12911 /* Don't propogate error information up to the client. Instead let
12912 the client find out about the error by querying the target. */
12913 inferior_event_handler (INF_REG_EVENT
, NULL
);
12917 remote_async_inferior_event_handler (gdb_client_data data
)
12919 inferior_event_handler (INF_REG_EVENT
, NULL
);
12923 remote_async (struct target_ops
*ops
, int enable
)
12925 struct remote_state
*rs
= get_remote_state ();
12929 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
12931 /* If there are pending events in the stop reply queue tell the
12932 event loop to process them. */
12933 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
12934 mark_async_event_handler (remote_async_inferior_event_token
);
12938 serial_async (rs
->remote_desc
, NULL
, NULL
);
12939 clear_async_event_handler (remote_async_inferior_event_token
);
12944 set_remote_cmd (char *args
, int from_tty
)
12946 help_list (remote_set_cmdlist
, "set remote ", all_commands
, gdb_stdout
);
12950 show_remote_cmd (char *args
, int from_tty
)
12952 /* We can't just use cmd_show_list here, because we want to skip
12953 the redundant "show remote Z-packet" and the legacy aliases. */
12954 struct cleanup
*showlist_chain
;
12955 struct cmd_list_element
*list
= remote_show_cmdlist
;
12956 struct ui_out
*uiout
= current_uiout
;
12958 showlist_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "showlist");
12959 for (; list
!= NULL
; list
= list
->next
)
12960 if (strcmp (list
->name
, "Z-packet") == 0)
12962 else if (list
->type
== not_set_cmd
)
12963 /* Alias commands are exactly like the original, except they
12964 don't have the normal type. */
12968 struct cleanup
*option_chain
12969 = make_cleanup_ui_out_tuple_begin_end (uiout
, "option");
12971 ui_out_field_string (uiout
, "name", list
->name
);
12972 ui_out_text (uiout
, ": ");
12973 if (list
->type
== show_cmd
)
12974 do_show_command ((char *) NULL
, from_tty
, list
);
12976 cmd_func (list
, NULL
, from_tty
);
12977 /* Close the tuple. */
12978 do_cleanups (option_chain
);
12981 /* Close the tuple. */
12982 do_cleanups (showlist_chain
);
12986 /* Function to be called whenever a new objfile (shlib) is detected. */
12988 remote_new_objfile (struct objfile
*objfile
)
12990 struct remote_state
*rs
= get_remote_state ();
12992 if (rs
->remote_desc
!= 0) /* Have a remote connection. */
12993 remote_check_symbols ();
12996 /* Pull all the tracepoints defined on the target and create local
12997 data structures representing them. We don't want to create real
12998 tracepoints yet, we don't want to mess up the user's existing
13002 remote_upload_tracepoints (struct target_ops
*self
, struct uploaded_tp
**utpp
)
13004 struct remote_state
*rs
= get_remote_state ();
13007 /* Ask for a first packet of tracepoint definition. */
13009 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13011 while (*p
&& *p
!= 'l')
13013 parse_tracepoint_definition (p
, utpp
);
13014 /* Ask for another packet of tracepoint definition. */
13016 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13023 remote_upload_trace_state_variables (struct target_ops
*self
,
13024 struct uploaded_tsv
**utsvp
)
13026 struct remote_state
*rs
= get_remote_state ();
13029 /* Ask for a first packet of variable definition. */
13031 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13033 while (*p
&& *p
!= 'l')
13035 parse_tsv_definition (p
, utsvp
);
13036 /* Ask for another packet of variable definition. */
13038 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13044 /* The "set/show range-stepping" show hook. */
13047 show_range_stepping (struct ui_file
*file
, int from_tty
,
13048 struct cmd_list_element
*c
,
13051 fprintf_filtered (file
,
13052 _("Debugger's willingness to use range stepping "
13053 "is %s.\n"), value
);
13056 /* The "set/show range-stepping" set hook. */
13059 set_range_stepping (char *ignore_args
, int from_tty
,
13060 struct cmd_list_element
*c
)
13062 struct remote_state
*rs
= get_remote_state ();
13064 /* Whene enabling, check whether range stepping is actually
13065 supported by the target, and warn if not. */
13066 if (use_range_stepping
)
13068 if (rs
->remote_desc
!= NULL
)
13070 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13071 remote_vcont_probe (rs
);
13073 if (packet_support (PACKET_vCont
) == PACKET_ENABLE
13074 && rs
->supports_vCont
.r
)
13078 warning (_("Range stepping is not supported by the current target"));
13083 _initialize_remote (void)
13085 struct remote_state
*rs
;
13086 struct cmd_list_element
*cmd
;
13087 const char *cmd_name
;
13089 /* architecture specific data */
13090 remote_gdbarch_data_handle
=
13091 gdbarch_data_register_post_init (init_remote_state
);
13092 remote_g_packet_data_handle
=
13093 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
13096 = register_program_space_data_with_cleanup (NULL
,
13097 remote_pspace_data_cleanup
);
13099 /* Initialize the per-target state. At the moment there is only one
13100 of these, not one per target. Only one target is active at a
13102 remote_state
= new_remote_state ();
13104 init_remote_ops ();
13105 add_target (&remote_ops
);
13107 init_extended_remote_ops ();
13108 add_target (&extended_remote_ops
);
13110 /* Hook into new objfile notification. */
13111 observer_attach_new_objfile (remote_new_objfile
);
13112 /* We're no longer interested in notification events of an inferior
13114 observer_attach_inferior_exit (discard_pending_stop_replies
);
13116 /* Set up signal handlers. */
13117 async_sigint_remote_token
=
13118 create_async_signal_handler (async_remote_interrupt
, NULL
);
13119 async_sigint_remote_twice_token
=
13120 create_async_signal_handler (async_remote_interrupt_twice
, NULL
);
13123 init_remote_threadtests ();
13126 stop_reply_queue
= QUEUE_alloc (stop_reply_p
, stop_reply_xfree
);
13127 /* set/show remote ... */
13129 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
13130 Remote protocol specific variables\n\
13131 Configure various remote-protocol specific variables such as\n\
13132 the packets being used"),
13133 &remote_set_cmdlist
, "set remote ",
13134 0 /* allow-unknown */, &setlist
);
13135 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
13136 Remote protocol specific variables\n\
13137 Configure various remote-protocol specific variables such as\n\
13138 the packets being used"),
13139 &remote_show_cmdlist
, "show remote ",
13140 0 /* allow-unknown */, &showlist
);
13142 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
13143 Compare section data on target to the exec file.\n\
13144 Argument is a single section name (default: all loaded sections).\n\
13145 To compare only read-only loaded sections, specify the -r option."),
13148 add_cmd ("packet", class_maintenance
, packet_command
, _("\
13149 Send an arbitrary packet to a remote target.\n\
13150 maintenance packet TEXT\n\
13151 If GDB is talking to an inferior via the GDB serial protocol, then\n\
13152 this command sends the string TEXT to the inferior, and displays the\n\
13153 response packet. GDB supplies the initial `$' character, and the\n\
13154 terminating `#' character and checksum."),
13157 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
13158 Set whether to send break if interrupted."), _("\
13159 Show whether to send break if interrupted."), _("\
13160 If set, a break, instead of a cntrl-c, is sent to the remote target."),
13161 set_remotebreak
, show_remotebreak
,
13162 &setlist
, &showlist
);
13163 cmd_name
= "remotebreak";
13164 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
13165 deprecate_cmd (cmd
, "set remote interrupt-sequence");
13166 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
13167 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
13168 deprecate_cmd (cmd
, "show remote interrupt-sequence");
13170 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
13171 interrupt_sequence_modes
, &interrupt_sequence_mode
,
13173 Set interrupt sequence to remote target."), _("\
13174 Show interrupt sequence to remote target."), _("\
13175 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
13176 NULL
, show_interrupt_sequence
,
13177 &remote_set_cmdlist
,
13178 &remote_show_cmdlist
);
13180 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
13181 &interrupt_on_connect
, _("\
13182 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
13183 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
13184 If set, interrupt sequence is sent to remote target."),
13186 &remote_set_cmdlist
, &remote_show_cmdlist
);
13188 /* Install commands for configuring memory read/write packets. */
13190 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
13191 Set the maximum number of bytes per memory write packet (deprecated)."),
13193 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
13194 Show the maximum number of bytes per memory write packet (deprecated)."),
13196 add_cmd ("memory-write-packet-size", no_class
,
13197 set_memory_write_packet_size
, _("\
13198 Set the maximum number of bytes per memory-write packet.\n\
13199 Specify the number of bytes in a packet or 0 (zero) for the\n\
13200 default packet size. The actual limit is further reduced\n\
13201 dependent on the target. Specify ``fixed'' to disable the\n\
13202 further restriction and ``limit'' to enable that restriction."),
13203 &remote_set_cmdlist
);
13204 add_cmd ("memory-read-packet-size", no_class
,
13205 set_memory_read_packet_size
, _("\
13206 Set the maximum number of bytes per memory-read packet.\n\
13207 Specify the number of bytes in a packet or 0 (zero) for the\n\
13208 default packet size. The actual limit is further reduced\n\
13209 dependent on the target. Specify ``fixed'' to disable the\n\
13210 further restriction and ``limit'' to enable that restriction."),
13211 &remote_set_cmdlist
);
13212 add_cmd ("memory-write-packet-size", no_class
,
13213 show_memory_write_packet_size
,
13214 _("Show the maximum number of bytes per memory-write packet."),
13215 &remote_show_cmdlist
);
13216 add_cmd ("memory-read-packet-size", no_class
,
13217 show_memory_read_packet_size
,
13218 _("Show the maximum number of bytes per memory-read packet."),
13219 &remote_show_cmdlist
);
13221 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
13222 &remote_hw_watchpoint_limit
, _("\
13223 Set the maximum number of target hardware watchpoints."), _("\
13224 Show the maximum number of target hardware watchpoints."), _("\
13225 Specify a negative limit for unlimited."),
13226 NULL
, NULL
, /* FIXME: i18n: The maximum
13227 number of target hardware
13228 watchpoints is %s. */
13229 &remote_set_cmdlist
, &remote_show_cmdlist
);
13230 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class
,
13231 &remote_hw_watchpoint_length_limit
, _("\
13232 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
13233 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
13234 Specify a negative limit for unlimited."),
13235 NULL
, NULL
, /* FIXME: i18n: The maximum
13236 length (in bytes) of a target
13237 hardware watchpoint is %s. */
13238 &remote_set_cmdlist
, &remote_show_cmdlist
);
13239 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
13240 &remote_hw_breakpoint_limit
, _("\
13241 Set the maximum number of target hardware breakpoints."), _("\
13242 Show the maximum number of target hardware breakpoints."), _("\
13243 Specify a negative limit for unlimited."),
13244 NULL
, NULL
, /* FIXME: i18n: The maximum
13245 number of target hardware
13246 breakpoints is %s. */
13247 &remote_set_cmdlist
, &remote_show_cmdlist
);
13249 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
13250 &remote_address_size
, _("\
13251 Set the maximum size of the address (in bits) in a memory packet."), _("\
13252 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
13254 NULL
, /* FIXME: i18n: */
13255 &setlist
, &showlist
);
13257 init_all_packet_configs ();
13259 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
13260 "X", "binary-download", 1);
13262 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
13263 "vCont", "verbose-resume", 0);
13265 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
13266 "QPassSignals", "pass-signals", 0);
13268 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
13269 "QProgramSignals", "program-signals", 0);
13271 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
13272 "qSymbol", "symbol-lookup", 0);
13274 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
13275 "P", "set-register", 1);
13277 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
13278 "p", "fetch-register", 1);
13280 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
13281 "Z0", "software-breakpoint", 0);
13283 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
13284 "Z1", "hardware-breakpoint", 0);
13286 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
13287 "Z2", "write-watchpoint", 0);
13289 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
13290 "Z3", "read-watchpoint", 0);
13292 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
13293 "Z4", "access-watchpoint", 0);
13295 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
13296 "qXfer:auxv:read", "read-aux-vector", 0);
13298 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
13299 "qXfer:exec-file:read", "pid-to-exec-file", 0);
13301 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
13302 "qXfer:features:read", "target-features", 0);
13304 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
13305 "qXfer:libraries:read", "library-info", 0);
13307 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
13308 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
13310 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
13311 "qXfer:memory-map:read", "memory-map", 0);
13313 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
13314 "qXfer:spu:read", "read-spu-object", 0);
13316 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
13317 "qXfer:spu:write", "write-spu-object", 0);
13319 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
13320 "qXfer:osdata:read", "osdata", 0);
13322 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
13323 "qXfer:threads:read", "threads", 0);
13325 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
13326 "qXfer:siginfo:read", "read-siginfo-object", 0);
13328 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
13329 "qXfer:siginfo:write", "write-siginfo-object", 0);
13331 add_packet_config_cmd
13332 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
13333 "qXfer:traceframe-info:read", "traceframe-info", 0);
13335 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
13336 "qXfer:uib:read", "unwind-info-block", 0);
13338 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
13339 "qGetTLSAddr", "get-thread-local-storage-address",
13342 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
13343 "qGetTIBAddr", "get-thread-information-block-address",
13346 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
13347 "bc", "reverse-continue", 0);
13349 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
13350 "bs", "reverse-step", 0);
13352 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
13353 "qSupported", "supported-packets", 0);
13355 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
13356 "qSearch:memory", "search-memory", 0);
13358 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
13359 "qTStatus", "trace-status", 0);
13361 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
13362 "vFile:setfs", "hostio-setfs", 0);
13364 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
13365 "vFile:open", "hostio-open", 0);
13367 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
13368 "vFile:pread", "hostio-pread", 0);
13370 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
13371 "vFile:pwrite", "hostio-pwrite", 0);
13373 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
13374 "vFile:close", "hostio-close", 0);
13376 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
13377 "vFile:unlink", "hostio-unlink", 0);
13379 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
13380 "vFile:readlink", "hostio-readlink", 0);
13382 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
13383 "vFile:fstat", "hostio-fstat", 0);
13385 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
13386 "vAttach", "attach", 0);
13388 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
13391 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
13392 "QStartNoAckMode", "noack", 0);
13394 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
13395 "vKill", "kill", 0);
13397 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
13398 "qAttached", "query-attached", 0);
13400 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
13401 "ConditionalTracepoints",
13402 "conditional-tracepoints", 0);
13404 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
13405 "ConditionalBreakpoints",
13406 "conditional-breakpoints", 0);
13408 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
13409 "BreakpointCommands",
13410 "breakpoint-commands", 0);
13412 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
13413 "FastTracepoints", "fast-tracepoints", 0);
13415 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
13416 "TracepointSource", "TracepointSource", 0);
13418 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
13419 "QAllow", "allow", 0);
13421 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
13422 "StaticTracepoints", "static-tracepoints", 0);
13424 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
13425 "InstallInTrace", "install-in-trace", 0);
13427 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
13428 "qXfer:statictrace:read", "read-sdata-object", 0);
13430 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
13431 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
13433 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
13434 "QDisableRandomization", "disable-randomization", 0);
13436 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
13437 "QAgent", "agent", 0);
13439 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
13440 "QTBuffer:size", "trace-buffer-size", 0);
13442 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
13443 "Qbtrace:off", "disable-btrace", 0);
13445 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
13446 "Qbtrace:bts", "enable-btrace-bts", 0);
13448 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
13449 "Qbtrace:pt", "enable-btrace-pt", 0);
13451 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
13452 "qXfer:btrace", "read-btrace", 0);
13454 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
13455 "qXfer:btrace-conf", "read-btrace-conf", 0);
13457 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
13458 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
13460 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
13461 "multiprocess-feature", "multiprocess-feature", 0);
13463 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
13464 "swbreak-feature", "swbreak-feature", 0);
13466 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
13467 "hwbreak-feature", "hwbreak-feature", 0);
13469 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
13470 "fork-event-feature", "fork-event-feature", 0);
13472 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
13473 "vfork-event-feature", "vfork-event-feature", 0);
13475 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
13476 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
13478 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
13479 "vContSupported", "verbose-resume-supported", 0);
13481 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
13482 "exec-event-feature", "exec-event-feature", 0);
13484 /* Assert that we've registered "set remote foo-packet" commands
13485 for all packet configs. */
13489 for (i
= 0; i
< PACKET_MAX
; i
++)
13491 /* Ideally all configs would have a command associated. Some
13492 still don't though. */
13497 case PACKET_QNonStop
:
13498 case PACKET_EnableDisableTracepoints_feature
:
13499 case PACKET_tracenz_feature
:
13500 case PACKET_DisconnectedTracing_feature
:
13501 case PACKET_augmented_libraries_svr4_read_feature
:
13503 /* Additions to this list need to be well justified:
13504 pre-existing packets are OK; new packets are not. */
13512 /* This catches both forgetting to add a config command, and
13513 forgetting to remove a packet from the exception list. */
13514 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
13518 /* Keep the old ``set remote Z-packet ...'' working. Each individual
13519 Z sub-packet has its own set and show commands, but users may
13520 have sets to this variable in their .gdbinit files (or in their
13522 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
13523 &remote_Z_packet_detect
, _("\
13524 Set use of remote protocol `Z' packets"), _("\
13525 Show use of remote protocol `Z' packets "), _("\
13526 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
13528 set_remote_protocol_Z_packet_cmd
,
13529 show_remote_protocol_Z_packet_cmd
,
13530 /* FIXME: i18n: Use of remote protocol
13531 `Z' packets is %s. */
13532 &remote_set_cmdlist
, &remote_show_cmdlist
);
13534 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
13535 Manipulate files on the remote system\n\
13536 Transfer files to and from the remote target system."),
13537 &remote_cmdlist
, "remote ",
13538 0 /* allow-unknown */, &cmdlist
);
13540 add_cmd ("put", class_files
, remote_put_command
,
13541 _("Copy a local file to the remote system."),
13544 add_cmd ("get", class_files
, remote_get_command
,
13545 _("Copy a remote file to the local system."),
13548 add_cmd ("delete", class_files
, remote_delete_command
,
13549 _("Delete a remote file."),
13552 add_setshow_string_noescape_cmd ("exec-file", class_files
,
13553 &remote_exec_file_var
, _("\
13554 Set the remote pathname for \"run\""), _("\
13555 Show the remote pathname for \"run\""), NULL
,
13556 set_remote_exec_file
,
13557 show_remote_exec_file
,
13558 &remote_set_cmdlist
,
13559 &remote_show_cmdlist
);
13561 add_setshow_boolean_cmd ("range-stepping", class_run
,
13562 &use_range_stepping
, _("\
13563 Enable or disable range stepping."), _("\
13564 Show whether target-assisted range stepping is enabled."), _("\
13565 If on, and the target supports it, when stepping a source line, GDB\n\
13566 tells the target to step the corresponding range of addresses itself instead\n\
13567 of issuing multiple single-steps. This speeds up source level\n\
13568 stepping. If off, GDB always issues single-steps, even if range\n\
13569 stepping is supported by the target. The default is on."),
13570 set_range_stepping
,
13571 show_range_stepping
,
13575 /* Eventually initialize fileio. See fileio.c */
13576 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
13578 /* Take advantage of the fact that the TID field is not used, to tag
13579 special ptids with it set to != 0. */
13580 magic_null_ptid
= ptid_build (42000, -1, 1);
13581 not_sent_ptid
= ptid_build (42000, -2, 1);
13582 any_thread_ptid
= ptid_build (42000, 0, 1);
13584 target_buf_size
= 2048;
13585 target_buf
= (char *) xmalloc (target_buf_size
);