1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
4 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
5 2010 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 /* See the GDB User Guide for details of the GDB remote protocol. */
25 #include "gdb_string.h"
31 #include "exceptions.h"
33 /*#include "terminal.h" */
36 #include "gdb-stabs.h"
37 #include "gdbthread.h"
41 #include "gdb_assert.h"
44 #include "cli/cli-decode.h"
45 #include "cli/cli-setshow.h"
46 #include "target-descriptions.h"
51 #include "event-loop.h"
52 #include "event-top.h"
58 #include "gdbcore.h" /* for exec_bfd */
60 #include "remote-fileio.h"
61 #include "gdb/fileio.h"
63 #include "xml-support.h"
65 #include "memory-map.h"
67 #include "tracepoint.h"
71 /* temp hacks for tracepoint encoding migration */
72 static char *target_buf
;
73 static long target_buf_size
;
75 encode_actions (struct breakpoint
*t
, struct bp_location
*tloc
,
76 char ***tdp_actions
, char ***stepping_actions
);
78 /* The size to align memory write packets, when practical. The protocol
79 does not guarantee any alignment, and gdb will generate short
80 writes and unaligned writes, but even as a best-effort attempt this
81 can improve bulk transfers. For instance, if a write is misaligned
82 relative to the target's data bus, the stub may need to make an extra
83 round trip fetching data from the target. This doesn't make a
84 huge difference, but it's easy to do, so we try to be helpful.
86 The alignment chosen is arbitrary; usually data bus width is
87 important here, not the possibly larger cache line size. */
88 enum { REMOTE_ALIGN_WRITES
= 16 };
90 /* Prototypes for local functions. */
91 static void cleanup_sigint_signal_handler (void *dummy
);
92 static void initialize_sigint_signal_handler (void);
93 static int getpkt_sane (char **buf
, long *sizeof_buf
, int forever
);
94 static int getpkt_or_notif_sane (char **buf
, long *sizeof_buf
,
97 static void handle_remote_sigint (int);
98 static void handle_remote_sigint_twice (int);
99 static void async_remote_interrupt (gdb_client_data
);
100 void async_remote_interrupt_twice (gdb_client_data
);
102 static void remote_files_info (struct target_ops
*ignore
);
104 static void remote_prepare_to_store (struct regcache
*regcache
);
106 static void remote_open (char *name
, int from_tty
);
108 static void extended_remote_open (char *name
, int from_tty
);
110 static void remote_open_1 (char *, int, struct target_ops
*, int extended_p
);
112 static void remote_close (int quitting
);
114 static void remote_mourn (struct target_ops
*ops
);
116 static void extended_remote_restart (void);
118 static void extended_remote_mourn (struct target_ops
*);
120 static void remote_mourn_1 (struct target_ops
*);
122 static void remote_send (char **buf
, long *sizeof_buf_p
);
124 static int readchar (int timeout
);
126 static void remote_kill (struct target_ops
*ops
);
128 static int tohex (int nib
);
130 static int remote_can_async_p (void);
132 static int remote_is_async_p (void);
134 static void remote_async (void (*callback
) (enum inferior_event_type event_type
,
135 void *context
), void *context
);
137 static int remote_async_mask (int new_mask
);
139 static void remote_detach (struct target_ops
*ops
, char *args
, int from_tty
);
141 static void remote_interrupt (int signo
);
143 static void remote_interrupt_twice (int signo
);
145 static void interrupt_query (void);
147 static void set_general_thread (struct ptid ptid
);
148 static void set_continue_thread (struct ptid ptid
);
150 static void get_offsets (void);
152 static void skip_frame (void);
154 static long read_frame (char **buf_p
, long *sizeof_buf
);
156 static int hexnumlen (ULONGEST num
);
158 static void init_remote_ops (void);
160 static void init_extended_remote_ops (void);
162 static void remote_stop (ptid_t
);
164 static int ishex (int ch
, int *val
);
166 static int stubhex (int ch
);
168 static int hexnumstr (char *, ULONGEST
);
170 static int hexnumnstr (char *, ULONGEST
, int);
172 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
174 static void print_packet (char *);
176 static void compare_sections_command (char *, int);
178 static void packet_command (char *, int);
180 static int stub_unpack_int (char *buff
, int fieldlength
);
182 static ptid_t
remote_current_thread (ptid_t oldptid
);
184 static void remote_find_new_threads (void);
186 static void record_currthread (ptid_t currthread
);
188 static int fromhex (int a
);
190 extern int hex2bin (const char *hex
, gdb_byte
*bin
, int count
);
192 extern int bin2hex (const gdb_byte
*bin
, char *hex
, int count
);
194 static int putpkt_binary (char *buf
, int cnt
);
196 static void check_binary_download (CORE_ADDR addr
);
198 struct packet_config
;
200 static void show_packet_config_cmd (struct packet_config
*config
);
202 static void update_packet_config (struct packet_config
*config
);
204 static void set_remote_protocol_packet_cmd (char *args
, int from_tty
,
205 struct cmd_list_element
*c
);
207 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
209 struct cmd_list_element
*c
,
212 static char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
213 static ptid_t
read_ptid (char *buf
, char **obuf
);
216 static int remote_get_trace_status (struct trace_status
*ts
);
218 static int remote_upload_tracepoints (struct uploaded_tp
**utpp
);
220 static int remote_upload_trace_state_variables (struct uploaded_tsv
**utsvp
);
222 static void remote_query_supported (void);
224 static void remote_check_symbols (struct objfile
*objfile
);
226 void _initialize_remote (void);
229 static struct stop_reply
*stop_reply_xmalloc (void);
230 static void stop_reply_xfree (struct stop_reply
*);
231 static void do_stop_reply_xfree (void *arg
);
232 static void remote_parse_stop_reply (char *buf
, struct stop_reply
*);
233 static void push_stop_reply (struct stop_reply
*);
234 static void remote_get_pending_stop_replies (void);
235 static void discard_pending_stop_replies (int pid
);
236 static int peek_stop_reply (ptid_t ptid
);
238 static void remote_async_inferior_event_handler (gdb_client_data
);
239 static void remote_async_get_pending_events_handler (gdb_client_data
);
241 static void remote_terminal_ours (void);
243 static int remote_read_description_p (struct target_ops
*target
);
245 static void remote_console_output (char *msg
);
247 /* The non-stop remote protocol provisions for one pending stop reply.
248 This is where we keep it until it is acknowledged. */
250 static struct stop_reply
*pending_stop_reply
= NULL
;
254 static struct cmd_list_element
*remote_cmdlist
;
256 /* For "set remote" and "show remote". */
258 static struct cmd_list_element
*remote_set_cmdlist
;
259 static struct cmd_list_element
*remote_show_cmdlist
;
261 /* Description of the remote protocol state for the currently
262 connected target. This is per-target state, and independent of the
263 selected architecture. */
267 /* A buffer to use for incoming packets, and its current size. The
268 buffer is grown dynamically for larger incoming packets.
269 Outgoing packets may also be constructed in this buffer.
270 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
271 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
276 /* If we negotiated packet size explicitly (and thus can bypass
277 heuristics for the largest packet size that will not overflow
278 a buffer in the stub), this will be set to that packet size.
279 Otherwise zero, meaning to use the guessed size. */
280 long explicit_packet_size
;
282 /* remote_wait is normally called when the target is running and
283 waits for a stop reply packet. But sometimes we need to call it
284 when the target is already stopped. We can send a "?" packet
285 and have remote_wait read the response. Or, if we already have
286 the response, we can stash it in BUF and tell remote_wait to
287 skip calling getpkt. This flag is set when BUF contains a
288 stop reply packet and the target is not waiting. */
289 int cached_wait_status
;
291 /* True, if in no ack mode. That is, neither GDB nor the stub will
292 expect acks from each other. The connection is assumed to be
296 /* True if we're connected in extended remote mode. */
299 /* True if the stub reported support for multi-process
301 int multi_process_aware
;
303 /* True if we resumed the target and we're waiting for the target to
304 stop. In the mean time, we can't start another command/query.
305 The remote server wouldn't be ready to process it, so we'd
306 timeout waiting for a reply that would never come and eventually
307 we'd close the connection. This can happen in asynchronous mode
308 because we allow GDB commands while the target is running. */
309 int waiting_for_stop_reply
;
311 /* True if the stub reports support for non-stop mode. */
314 /* True if the stub reports support for vCont;t. */
317 /* True if the stub reports support for conditional tracepoints. */
318 int cond_tracepoints
;
320 /* True if the stub reports support for fast tracepoints. */
321 int fast_tracepoints
;
323 /* True if the stub can continue running a trace while GDB is
325 int disconnected_tracing
;
327 /* Nonzero if the user has pressed Ctrl-C, but the target hasn't
328 responded to that. */
332 /* Private data that we'll store in (struct thread_info)->private. */
333 struct private_thread_info
340 free_private_thread_info (struct private_thread_info
*info
)
346 /* Returns true if the multi-process extensions are in effect. */
348 remote_multi_process_p (struct remote_state
*rs
)
350 return rs
->extended
&& rs
->multi_process_aware
;
353 /* This data could be associated with a target, but we do not always
354 have access to the current target when we need it, so for now it is
355 static. This will be fine for as long as only one target is in use
357 static struct remote_state remote_state
;
359 static struct remote_state
*
360 get_remote_state_raw (void)
362 return &remote_state
;
365 /* Description of the remote protocol for a given architecture. */
369 long offset
; /* Offset into G packet. */
370 long regnum
; /* GDB's internal register number. */
371 LONGEST pnum
; /* Remote protocol register number. */
372 int in_g_packet
; /* Always part of G packet. */
373 /* long size in bytes; == register_size (target_gdbarch, regnum);
375 /* char *name; == gdbarch_register_name (target_gdbarch, regnum);
379 struct remote_arch_state
381 /* Description of the remote protocol registers. */
382 long sizeof_g_packet
;
384 /* Description of the remote protocol registers indexed by REGNUM
385 (making an array gdbarch_num_regs in size). */
386 struct packet_reg
*regs
;
388 /* This is the size (in chars) of the first response to the ``g''
389 packet. It is used as a heuristic when determining the maximum
390 size of memory-read and memory-write packets. A target will
391 typically only reserve a buffer large enough to hold the ``g''
392 packet. The size does not include packet overhead (headers and
394 long actual_register_packet_size
;
396 /* This is the maximum size (in chars) of a non read/write packet.
397 It is also used as a cap on the size of read/write packets. */
398 long remote_packet_size
;
401 long sizeof_pkt
= 2000;
403 /* Utility: generate error from an incoming stub packet. */
405 trace_error (char *buf
)
408 return; /* not an error msg */
411 case '1': /* malformed packet error */
412 if (*++buf
== '0') /* general case: */
413 error (_("remote.c: error in outgoing packet."));
415 error (_("remote.c: error in outgoing packet at field #%ld."),
416 strtol (buf
, NULL
, 16));
418 error (_("trace API error 0x%s."), ++buf
);
420 error (_("Target returns error code '%s'."), buf
);
424 /* Utility: wait for reply from stub, while accepting "O" packets. */
426 remote_get_noisy_reply (char **buf_p
,
429 do /* Loop on reply from remote stub. */
433 QUIT
; /* allow user to bail out with ^C */
434 getpkt (buf_p
, sizeof_buf
, 0);
438 else if (strncmp (buf
, "qRelocInsn:", strlen ("qRelocInsn:")) == 0)
441 CORE_ADDR from
, to
, org_to
;
443 int adjusted_size
= 0;
444 volatile struct gdb_exception ex
;
446 p
= buf
+ strlen ("qRelocInsn:");
447 pp
= unpack_varlen_hex (p
, &ul
);
449 error (_("invalid qRelocInsn packet: %s"), buf
);
453 pp
= unpack_varlen_hex (p
, &ul
);
458 TRY_CATCH (ex
, RETURN_MASK_ALL
)
460 gdbarch_relocate_instruction (target_gdbarch
, &to
, from
);
464 adjusted_size
= to
- org_to
;
466 sprintf (buf
, "qRelocInsn:%x", adjusted_size
);
469 else if (ex
.reason
< 0 && ex
.error
== MEMORY_ERROR
)
471 /* Propagate memory errors silently back to the target.
472 The stub may have limited the range of addresses we
473 can write to, for example. */
478 /* Something unexpectedly bad happened. Be verbose so
479 we can tell what, and propagate the error back to the
480 stub, so it doesn't get stuck waiting for a
482 exception_fprintf (gdb_stderr
, ex
,
483 _("warning: relocating instruction: "));
487 else if (buf
[0] == 'O' && buf
[1] != 'K')
488 remote_console_output (buf
+ 1); /* 'O' message from stub */
490 return buf
; /* here's the actual reply */
495 /* Handle for retreving the remote protocol data from gdbarch. */
496 static struct gdbarch_data
*remote_gdbarch_data_handle
;
498 static struct remote_arch_state
*
499 get_remote_arch_state (void)
501 return gdbarch_data (target_gdbarch
, remote_gdbarch_data_handle
);
504 /* Fetch the global remote target state. */
506 static struct remote_state
*
507 get_remote_state (void)
509 /* Make sure that the remote architecture state has been
510 initialized, because doing so might reallocate rs->buf. Any
511 function which calls getpkt also needs to be mindful of changes
512 to rs->buf, but this call limits the number of places which run
514 get_remote_arch_state ();
516 return get_remote_state_raw ();
520 compare_pnums (const void *lhs_
, const void *rhs_
)
522 const struct packet_reg
* const *lhs
= lhs_
;
523 const struct packet_reg
* const *rhs
= rhs_
;
525 if ((*lhs
)->pnum
< (*rhs
)->pnum
)
527 else if ((*lhs
)->pnum
== (*rhs
)->pnum
)
534 init_remote_state (struct gdbarch
*gdbarch
)
536 int regnum
, num_remote_regs
, offset
;
537 struct remote_state
*rs
= get_remote_state_raw ();
538 struct remote_arch_state
*rsa
;
539 struct packet_reg
**remote_regs
;
541 rsa
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_arch_state
);
543 /* Use the architecture to build a regnum<->pnum table, which will be
544 1:1 unless a feature set specifies otherwise. */
545 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
,
546 gdbarch_num_regs (gdbarch
),
548 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
550 struct packet_reg
*r
= &rsa
->regs
[regnum
];
552 if (register_size (gdbarch
, regnum
) == 0)
553 /* Do not try to fetch zero-sized (placeholder) registers. */
556 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
561 /* Define the g/G packet format as the contents of each register
562 with a remote protocol number, in order of ascending protocol
565 remote_regs
= alloca (gdbarch_num_regs (gdbarch
)
566 * sizeof (struct packet_reg
*));
567 for (num_remote_regs
= 0, regnum
= 0;
568 regnum
< gdbarch_num_regs (gdbarch
);
570 if (rsa
->regs
[regnum
].pnum
!= -1)
571 remote_regs
[num_remote_regs
++] = &rsa
->regs
[regnum
];
573 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
576 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
578 remote_regs
[regnum
]->in_g_packet
= 1;
579 remote_regs
[regnum
]->offset
= offset
;
580 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
583 /* Record the maximum possible size of the g packet - it may turn out
585 rsa
->sizeof_g_packet
= offset
;
587 /* Default maximum number of characters in a packet body. Many
588 remote stubs have a hardwired buffer size of 400 bytes
589 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
590 as the maximum packet-size to ensure that the packet and an extra
591 NUL character can always fit in the buffer. This stops GDB
592 trashing stubs that try to squeeze an extra NUL into what is
593 already a full buffer (As of 1999-12-04 that was most stubs). */
594 rsa
->remote_packet_size
= 400 - 1;
596 /* This one is filled in when a ``g'' packet is received. */
597 rsa
->actual_register_packet_size
= 0;
599 /* Should rsa->sizeof_g_packet needs more space than the
600 default, adjust the size accordingly. Remember that each byte is
601 encoded as two characters. 32 is the overhead for the packet
602 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
603 (``$NN:G...#NN'') is a better guess, the below has been padded a
605 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
606 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
608 /* Make sure that the packet buffer is plenty big enough for
609 this architecture. */
610 if (rs
->buf_size
< rsa
->remote_packet_size
)
612 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
613 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
619 /* Return the current allowed size of a remote packet. This is
620 inferred from the current architecture, and should be used to
621 limit the length of outgoing packets. */
623 get_remote_packet_size (void)
625 struct remote_state
*rs
= get_remote_state ();
626 struct remote_arch_state
*rsa
= get_remote_arch_state ();
628 if (rs
->explicit_packet_size
)
629 return rs
->explicit_packet_size
;
631 return rsa
->remote_packet_size
;
634 static struct packet_reg
*
635 packet_reg_from_regnum (struct remote_arch_state
*rsa
, long regnum
)
637 if (regnum
< 0 && regnum
>= gdbarch_num_regs (target_gdbarch
))
641 struct packet_reg
*r
= &rsa
->regs
[regnum
];
643 gdb_assert (r
->regnum
== regnum
);
648 static struct packet_reg
*
649 packet_reg_from_pnum (struct remote_arch_state
*rsa
, LONGEST pnum
)
653 for (i
= 0; i
< gdbarch_num_regs (target_gdbarch
); i
++)
655 struct packet_reg
*r
= &rsa
->regs
[i
];
663 /* FIXME: graces/2002-08-08: These variables should eventually be
664 bound to an instance of the target object (as in gdbarch-tdep()),
665 when such a thing exists. */
667 /* This is set to the data address of the access causing the target
668 to stop for a watchpoint. */
669 static CORE_ADDR remote_watch_data_address
;
671 /* This is non-zero if target stopped for a watchpoint. */
672 static int remote_stopped_by_watchpoint_p
;
674 static struct target_ops remote_ops
;
676 static struct target_ops extended_remote_ops
;
678 static int remote_async_mask_value
= 1;
680 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
681 ``forever'' still use the normal timeout mechanism. This is
682 currently used by the ASYNC code to guarentee that target reads
683 during the initial connect always time-out. Once getpkt has been
684 modified to return a timeout indication and, in turn
685 remote_wait()/wait_for_inferior() have gained a timeout parameter
687 static int wait_forever_enabled_p
= 1;
689 /* Allow the user to specify what sequence to send to the remote
690 when he requests a program interruption: Although ^C is usually
691 what remote systems expect (this is the default, here), it is
692 sometimes preferable to send a break. On other systems such
693 as the Linux kernel, a break followed by g, which is Magic SysRq g
694 is required in order to interrupt the execution. */
695 const char interrupt_sequence_control_c
[] = "Ctrl-C";
696 const char interrupt_sequence_break
[] = "BREAK";
697 const char interrupt_sequence_break_g
[] = "BREAK-g";
698 static const char *interrupt_sequence_modes
[] =
700 interrupt_sequence_control_c
,
701 interrupt_sequence_break
,
702 interrupt_sequence_break_g
,
705 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
708 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
709 struct cmd_list_element
*c
,
712 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
713 fprintf_filtered (file
,
714 _("Send the ASCII ETX character (Ctrl-c) "
715 "to the remote target to interrupt the "
716 "execution of the program.\n"));
717 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
718 fprintf_filtered (file
,
719 _("send a break signal to the remote target "
720 "to interrupt the execution of the program.\n"));
721 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
722 fprintf_filtered (file
,
723 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
724 "the remote target to interrupt the execution "
725 "of Linux kernel.\n"));
727 internal_error (__FILE__
, __LINE__
,
728 _("Invalid value for interrupt_sequence_mode: %s."),
729 interrupt_sequence_mode
);
732 /* This boolean variable specifies whether interrupt_sequence is sent
733 to the remote target when gdb connects to it.
734 This is mostly needed when you debug the Linux kernel: The Linux kernel
735 expects BREAK g which is Magic SysRq g for connecting gdb. */
736 static int interrupt_on_connect
= 0;
738 /* This variable is used to implement the "set/show remotebreak" commands.
739 Since these commands are now deprecated in favor of "set/show remote
740 interrupt-sequence", it no longer has any effect on the code. */
741 static int remote_break
;
744 set_remotebreak (char *args
, int from_tty
, struct cmd_list_element
*c
)
747 interrupt_sequence_mode
= interrupt_sequence_break
;
749 interrupt_sequence_mode
= interrupt_sequence_control_c
;
753 show_remotebreak (struct ui_file
*file
, int from_tty
,
754 struct cmd_list_element
*c
,
759 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
760 remote_open knows that we don't have a file open when the program
762 static struct serial
*remote_desc
= NULL
;
764 /* This variable sets the number of bits in an address that are to be
765 sent in a memory ("M" or "m") packet. Normally, after stripping
766 leading zeros, the entire address would be sent. This variable
767 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
768 initial implementation of remote.c restricted the address sent in
769 memory packets to ``host::sizeof long'' bytes - (typically 32
770 bits). Consequently, for 64 bit targets, the upper 32 bits of an
771 address was never sent. Since fixing this bug may cause a break in
772 some remote targets this variable is principly provided to
773 facilitate backward compatibility. */
775 static int remote_address_size
;
777 /* Temporary to track who currently owns the terminal. See
778 remote_terminal_* for more details. */
780 static int remote_async_terminal_ours_p
;
782 /* The executable file to use for "run" on the remote side. */
784 static char *remote_exec_file
= "";
787 /* User configurable variables for the number of characters in a
788 memory read/write packet. MIN (rsa->remote_packet_size,
789 rsa->sizeof_g_packet) is the default. Some targets need smaller
790 values (fifo overruns, et.al.) and some users need larger values
791 (speed up transfers). The variables ``preferred_*'' (the user
792 request), ``current_*'' (what was actually set) and ``forced_*''
793 (Positive - a soft limit, negative - a hard limit). */
795 struct memory_packet_config
802 /* Compute the current size of a read/write packet. Since this makes
803 use of ``actual_register_packet_size'' the computation is dynamic. */
806 get_memory_packet_size (struct memory_packet_config
*config
)
808 struct remote_state
*rs
= get_remote_state ();
809 struct remote_arch_state
*rsa
= get_remote_arch_state ();
811 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
812 law?) that some hosts don't cope very well with large alloca()
813 calls. Eventually the alloca() code will be replaced by calls to
814 xmalloc() and make_cleanups() allowing this restriction to either
815 be lifted or removed. */
816 #ifndef MAX_REMOTE_PACKET_SIZE
817 #define MAX_REMOTE_PACKET_SIZE 16384
819 /* NOTE: 20 ensures we can write at least one byte. */
820 #ifndef MIN_REMOTE_PACKET_SIZE
821 #define MIN_REMOTE_PACKET_SIZE 20
826 if (config
->size
<= 0)
827 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
829 what_they_get
= config
->size
;
833 what_they_get
= get_remote_packet_size ();
834 /* Limit the packet to the size specified by the user. */
836 && what_they_get
> config
->size
)
837 what_they_get
= config
->size
;
839 /* Limit it to the size of the targets ``g'' response unless we have
840 permission from the stub to use a larger packet size. */
841 if (rs
->explicit_packet_size
== 0
842 && rsa
->actual_register_packet_size
> 0
843 && what_they_get
> rsa
->actual_register_packet_size
)
844 what_they_get
= rsa
->actual_register_packet_size
;
846 if (what_they_get
> MAX_REMOTE_PACKET_SIZE
)
847 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
848 if (what_they_get
< MIN_REMOTE_PACKET_SIZE
)
849 what_they_get
= MIN_REMOTE_PACKET_SIZE
;
851 /* Make sure there is room in the global buffer for this packet
852 (including its trailing NUL byte). */
853 if (rs
->buf_size
< what_they_get
+ 1)
855 rs
->buf_size
= 2 * what_they_get
;
856 rs
->buf
= xrealloc (rs
->buf
, 2 * what_they_get
);
859 return what_they_get
;
862 /* Update the size of a read/write packet. If they user wants
863 something really big then do a sanity check. */
866 set_memory_packet_size (char *args
, struct memory_packet_config
*config
)
868 int fixed_p
= config
->fixed_p
;
869 long size
= config
->size
;
872 error (_("Argument required (integer, `fixed' or `limited')."));
873 else if (strcmp (args
, "hard") == 0
874 || strcmp (args
, "fixed") == 0)
876 else if (strcmp (args
, "soft") == 0
877 || strcmp (args
, "limit") == 0)
883 size
= strtoul (args
, &end
, 0);
885 error (_("Invalid %s (bad syntax)."), config
->name
);
887 /* Instead of explicitly capping the size of a packet to
888 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
889 instead allowed to set the size to something arbitrarily
891 if (size
> MAX_REMOTE_PACKET_SIZE
)
892 error (_("Invalid %s (too large)."), config
->name
);
896 if (fixed_p
&& !config
->fixed_p
)
898 if (! query (_("The target may not be able to correctly handle a %s\n"
899 "of %ld bytes. Change the packet size? "),
901 error (_("Packet size not changed."));
903 /* Update the config. */
904 config
->fixed_p
= fixed_p
;
909 show_memory_packet_size (struct memory_packet_config
*config
)
911 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
913 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
914 get_memory_packet_size (config
));
916 printf_filtered (_("Packets are limited to %ld bytes.\n"),
917 get_memory_packet_size (config
));
920 static struct memory_packet_config memory_write_packet_config
=
922 "memory-write-packet-size",
926 set_memory_write_packet_size (char *args
, int from_tty
)
928 set_memory_packet_size (args
, &memory_write_packet_config
);
932 show_memory_write_packet_size (char *args
, int from_tty
)
934 show_memory_packet_size (&memory_write_packet_config
);
938 get_memory_write_packet_size (void)
940 return get_memory_packet_size (&memory_write_packet_config
);
943 static struct memory_packet_config memory_read_packet_config
=
945 "memory-read-packet-size",
949 set_memory_read_packet_size (char *args
, int from_tty
)
951 set_memory_packet_size (args
, &memory_read_packet_config
);
955 show_memory_read_packet_size (char *args
, int from_tty
)
957 show_memory_packet_size (&memory_read_packet_config
);
961 get_memory_read_packet_size (void)
963 long size
= get_memory_packet_size (&memory_read_packet_config
);
965 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
966 extra buffer size argument before the memory read size can be
967 increased beyond this. */
968 if (size
> get_remote_packet_size ())
969 size
= get_remote_packet_size ();
974 /* Generic configuration support for packets the stub optionally
975 supports. Allows the user to specify the use of the packet as well
976 as allowing GDB to auto-detect support in the remote stub. */
980 PACKET_SUPPORT_UNKNOWN
= 0,
989 enum auto_boolean detect
;
990 enum packet_support support
;
993 /* Analyze a packet's return value and update the packet config
1004 update_packet_config (struct packet_config
*config
)
1006 switch (config
->detect
)
1008 case AUTO_BOOLEAN_TRUE
:
1009 config
->support
= PACKET_ENABLE
;
1011 case AUTO_BOOLEAN_FALSE
:
1012 config
->support
= PACKET_DISABLE
;
1014 case AUTO_BOOLEAN_AUTO
:
1015 config
->support
= PACKET_SUPPORT_UNKNOWN
;
1021 show_packet_config_cmd (struct packet_config
*config
)
1023 char *support
= "internal-error";
1025 switch (config
->support
)
1028 support
= "enabled";
1030 case PACKET_DISABLE
:
1031 support
= "disabled";
1033 case PACKET_SUPPORT_UNKNOWN
:
1034 support
= "unknown";
1037 switch (config
->detect
)
1039 case AUTO_BOOLEAN_AUTO
:
1040 printf_filtered (_("Support for the `%s' packet is auto-detected, currently %s.\n"),
1041 config
->name
, support
);
1043 case AUTO_BOOLEAN_TRUE
:
1044 case AUTO_BOOLEAN_FALSE
:
1045 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1046 config
->name
, support
);
1052 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1053 const char *title
, int legacy
)
1059 config
->name
= name
;
1060 config
->title
= title
;
1061 config
->detect
= AUTO_BOOLEAN_AUTO
;
1062 config
->support
= PACKET_SUPPORT_UNKNOWN
;
1063 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1065 show_doc
= xstrprintf ("Show current use of remote protocol `%s' (%s) packet",
1067 /* set/show TITLE-packet {auto,on,off} */
1068 cmd_name
= xstrprintf ("%s-packet", title
);
1069 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1070 &config
->detect
, set_doc
, show_doc
, NULL
, /* help_doc */
1071 set_remote_protocol_packet_cmd
,
1072 show_remote_protocol_packet_cmd
,
1073 &remote_set_cmdlist
, &remote_show_cmdlist
);
1074 /* The command code copies the documentation strings. */
1077 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1082 legacy_name
= xstrprintf ("%s-packet", name
);
1083 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1084 &remote_set_cmdlist
);
1085 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1086 &remote_show_cmdlist
);
1090 static enum packet_result
1091 packet_check_result (const char *buf
)
1095 /* The stub recognized the packet request. Check that the
1096 operation succeeded. */
1098 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1100 /* "Enn" - definitly an error. */
1101 return PACKET_ERROR
;
1103 /* Always treat "E." as an error. This will be used for
1104 more verbose error messages, such as E.memtypes. */
1105 if (buf
[0] == 'E' && buf
[1] == '.')
1106 return PACKET_ERROR
;
1108 /* The packet may or may not be OK. Just assume it is. */
1112 /* The stub does not support the packet. */
1113 return PACKET_UNKNOWN
;
1116 static enum packet_result
1117 packet_ok (const char *buf
, struct packet_config
*config
)
1119 enum packet_result result
;
1121 result
= packet_check_result (buf
);
1126 /* The stub recognized the packet request. */
1127 switch (config
->support
)
1129 case PACKET_SUPPORT_UNKNOWN
:
1131 fprintf_unfiltered (gdb_stdlog
,
1132 "Packet %s (%s) is supported\n",
1133 config
->name
, config
->title
);
1134 config
->support
= PACKET_ENABLE
;
1136 case PACKET_DISABLE
:
1137 internal_error (__FILE__
, __LINE__
,
1138 _("packet_ok: attempt to use a disabled packet"));
1144 case PACKET_UNKNOWN
:
1145 /* The stub does not support the packet. */
1146 switch (config
->support
)
1149 if (config
->detect
== AUTO_BOOLEAN_AUTO
)
1150 /* If the stub previously indicated that the packet was
1151 supported then there is a protocol error.. */
1152 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1153 config
->name
, config
->title
);
1155 /* The user set it wrong. */
1156 error (_("Enabled packet %s (%s) not recognized by stub"),
1157 config
->name
, config
->title
);
1159 case PACKET_SUPPORT_UNKNOWN
:
1161 fprintf_unfiltered (gdb_stdlog
,
1162 "Packet %s (%s) is NOT supported\n",
1163 config
->name
, config
->title
);
1164 config
->support
= PACKET_DISABLE
;
1166 case PACKET_DISABLE
:
1188 PACKET_vFile_pwrite
,
1190 PACKET_vFile_unlink
,
1192 PACKET_qXfer_features
,
1193 PACKET_qXfer_libraries
,
1194 PACKET_qXfer_memory_map
,
1195 PACKET_qXfer_spu_read
,
1196 PACKET_qXfer_spu_write
,
1197 PACKET_qXfer_osdata
,
1198 PACKET_qXfer_threads
,
1202 PACKET_QPassSignals
,
1203 PACKET_qSearch_memory
,
1206 PACKET_QStartNoAckMode
,
1208 PACKET_qXfer_siginfo_read
,
1209 PACKET_qXfer_siginfo_write
,
1211 PACKET_ConditionalTracepoints
,
1212 PACKET_FastTracepoints
,
1215 PACKET_TracepointSource
,
1219 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
1222 set_remote_protocol_packet_cmd (char *args
, int from_tty
,
1223 struct cmd_list_element
*c
)
1225 struct packet_config
*packet
;
1227 for (packet
= remote_protocol_packets
;
1228 packet
< &remote_protocol_packets
[PACKET_MAX
];
1231 if (&packet
->detect
== c
->var
)
1233 update_packet_config (packet
);
1237 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
1242 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
1243 struct cmd_list_element
*c
,
1246 struct packet_config
*packet
;
1248 for (packet
= remote_protocol_packets
;
1249 packet
< &remote_protocol_packets
[PACKET_MAX
];
1252 if (&packet
->detect
== c
->var
)
1254 show_packet_config_cmd (packet
);
1258 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
1262 /* Should we try one of the 'Z' requests? */
1266 Z_PACKET_SOFTWARE_BP
,
1267 Z_PACKET_HARDWARE_BP
,
1274 /* For compatibility with older distributions. Provide a ``set remote
1275 Z-packet ...'' command that updates all the Z packet types. */
1277 static enum auto_boolean remote_Z_packet_detect
;
1280 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
1281 struct cmd_list_element
*c
)
1285 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1287 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
1288 update_packet_config (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1293 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
1294 struct cmd_list_element
*c
,
1299 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1301 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1305 /* Should we try the 'ThreadInfo' query packet?
1307 This variable (NOT available to the user: auto-detect only!)
1308 determines whether GDB will use the new, simpler "ThreadInfo"
1309 query or the older, more complex syntax for thread queries.
1310 This is an auto-detect variable (set to true at each connect,
1311 and set to false when the target fails to recognize it). */
1313 static int use_threadinfo_query
;
1314 static int use_threadextra_query
;
1316 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1317 static struct async_signal_handler
*sigint_remote_twice_token
;
1318 static struct async_signal_handler
*sigint_remote_token
;
1321 /* Asynchronous signal handle registered as event loop source for
1322 when we have pending events ready to be passed to the core. */
1324 static struct async_event_handler
*remote_async_inferior_event_token
;
1326 /* Asynchronous signal handle registered as event loop source for when
1327 the remote sent us a %Stop notification. The registered callback
1328 will do a vStopped sequence to pull the rest of the events out of
1329 the remote side into our event queue. */
1331 static struct async_event_handler
*remote_async_get_pending_events_token
;
1334 static ptid_t magic_null_ptid
;
1335 static ptid_t not_sent_ptid
;
1336 static ptid_t any_thread_ptid
;
1338 /* These are the threads which we last sent to the remote system. The
1339 TID member will be -1 for all or -2 for not sent yet. */
1341 static ptid_t general_thread
;
1342 static ptid_t continue_thread
;
1344 /* Find out if the stub attached to PID (and hence GDB should offer to
1345 detach instead of killing it when bailing out). */
1348 remote_query_attached (int pid
)
1350 struct remote_state
*rs
= get_remote_state ();
1352 if (remote_protocol_packets
[PACKET_qAttached
].support
== PACKET_DISABLE
)
1355 if (remote_multi_process_p (rs
))
1356 sprintf (rs
->buf
, "qAttached:%x", pid
);
1358 sprintf (rs
->buf
, "qAttached");
1361 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1363 switch (packet_ok (rs
->buf
,
1364 &remote_protocol_packets
[PACKET_qAttached
]))
1367 if (strcmp (rs
->buf
, "1") == 0)
1371 warning (_("Remote failure reply: %s"), rs
->buf
);
1373 case PACKET_UNKNOWN
:
1380 /* Add PID to GDB's inferior table. Since we can be connected to a
1381 remote system before before knowing about any inferior, mark the
1382 target with execution when we find the first inferior. If ATTACHED
1383 is 1, then we had just attached to this inferior. If it is 0, then
1384 we just created this inferior. If it is -1, then try querying the
1385 remote stub to find out if it had attached to the inferior or
1388 static struct inferior
*
1389 remote_add_inferior (int pid
, int attached
)
1391 struct inferior
*inf
;
1393 /* Check whether this process we're learning about is to be
1394 considered attached, or if is to be considered to have been
1395 spawned by the stub. */
1397 attached
= remote_query_attached (pid
);
1399 if (gdbarch_has_global_solist (target_gdbarch
))
1401 /* If the target shares code across all inferiors, then every
1402 attach adds a new inferior. */
1403 inf
= add_inferior (pid
);
1405 /* ... and every inferior is bound to the same program space.
1406 However, each inferior may still have its own address
1408 inf
->aspace
= maybe_new_address_space ();
1409 inf
->pspace
= current_program_space
;
1413 /* In the traditional debugging scenario, there's a 1-1 match
1414 between program/address spaces. We simply bind the inferior
1415 to the program space's address space. */
1416 inf
= current_inferior ();
1417 inferior_appeared (inf
, pid
);
1420 inf
->attach_flag
= attached
;
1425 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1426 according to RUNNING. */
1429 remote_add_thread (ptid_t ptid
, int running
)
1433 set_executing (ptid
, running
);
1434 set_running (ptid
, running
);
1437 /* Come here when we learn about a thread id from the remote target.
1438 It may be the first time we hear about such thread, so take the
1439 opportunity to add it to GDB's thread list. In case this is the
1440 first time we're noticing its corresponding inferior, add it to
1441 GDB's inferior list as well. */
1444 remote_notice_new_inferior (ptid_t currthread
, int running
)
1446 /* If this is a new thread, add it to GDB's thread list.
1447 If we leave it up to WFI to do this, bad things will happen. */
1449 if (in_thread_list (currthread
) && is_exited (currthread
))
1451 /* We're seeing an event on a thread id we knew had exited.
1452 This has to be a new thread reusing the old id. Add it. */
1453 remote_add_thread (currthread
, running
);
1457 if (!in_thread_list (currthread
))
1459 struct inferior
*inf
= NULL
;
1460 int pid
= ptid_get_pid (currthread
);
1462 if (ptid_is_pid (inferior_ptid
)
1463 && pid
== ptid_get_pid (inferior_ptid
))
1465 /* inferior_ptid has no thread member yet. This can happen
1466 with the vAttach -> remote_wait,"TAAthread:" path if the
1467 stub doesn't support qC. This is the first stop reported
1468 after an attach, so this is the main thread. Update the
1469 ptid in the thread list. */
1470 if (in_thread_list (pid_to_ptid (pid
)))
1471 thread_change_ptid (inferior_ptid
, currthread
);
1474 remote_add_thread (currthread
, running
);
1475 inferior_ptid
= currthread
;
1480 if (ptid_equal (magic_null_ptid
, inferior_ptid
))
1482 /* inferior_ptid is not set yet. This can happen with the
1483 vRun -> remote_wait,"TAAthread:" path if the stub
1484 doesn't support qC. This is the first stop reported
1485 after an attach, so this is the main thread. Update the
1486 ptid in the thread list. */
1487 thread_change_ptid (inferior_ptid
, currthread
);
1491 /* When connecting to a target remote, or to a target
1492 extended-remote which already was debugging an inferior, we
1493 may not know about it yet. Add it before adding its child
1494 thread, so notifications are emitted in a sensible order. */
1495 if (!in_inferior_list (ptid_get_pid (currthread
)))
1496 inf
= remote_add_inferior (ptid_get_pid (currthread
), -1);
1498 /* This is really a new thread. Add it. */
1499 remote_add_thread (currthread
, running
);
1501 /* If we found a new inferior, let the common code do whatever
1502 it needs to with it (e.g., read shared libraries, insert
1505 notice_new_inferior (currthread
, running
, 0);
1509 /* Return the private thread data, creating it if necessary. */
1511 struct private_thread_info
*
1512 demand_private_info (ptid_t ptid
)
1514 struct thread_info
*info
= find_thread_ptid (ptid
);
1520 info
->private = xmalloc (sizeof (*(info
->private)));
1521 info
->private_dtor
= free_private_thread_info
;
1522 info
->private->core
= -1;
1523 info
->private->extra
= 0;
1526 return info
->private;
1529 /* Call this function as a result of
1530 1) A halt indication (T packet) containing a thread id
1531 2) A direct query of currthread
1532 3) Successful execution of set thread
1536 record_currthread (ptid_t currthread
)
1538 general_thread
= currthread
;
1541 static char *last_pass_packet
;
1543 /* If 'QPassSignals' is supported, tell the remote stub what signals
1544 it can simply pass through to the inferior without reporting. */
1547 remote_pass_signals (void)
1549 if (remote_protocol_packets
[PACKET_QPassSignals
].support
!= PACKET_DISABLE
)
1551 char *pass_packet
, *p
;
1552 int numsigs
= (int) TARGET_SIGNAL_LAST
;
1555 gdb_assert (numsigs
< 256);
1556 for (i
= 0; i
< numsigs
; i
++)
1558 if (signal_stop_state (i
) == 0
1559 && signal_print_state (i
) == 0
1560 && signal_pass_state (i
) == 1)
1563 pass_packet
= xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
1564 strcpy (pass_packet
, "QPassSignals:");
1565 p
= pass_packet
+ strlen (pass_packet
);
1566 for (i
= 0; i
< numsigs
; i
++)
1568 if (signal_stop_state (i
) == 0
1569 && signal_print_state (i
) == 0
1570 && signal_pass_state (i
) == 1)
1573 *p
++ = tohex (i
>> 4);
1574 *p
++ = tohex (i
& 15);
1583 if (!last_pass_packet
|| strcmp (last_pass_packet
, pass_packet
))
1585 struct remote_state
*rs
= get_remote_state ();
1586 char *buf
= rs
->buf
;
1588 putpkt (pass_packet
);
1589 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1590 packet_ok (buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
1591 if (last_pass_packet
)
1592 xfree (last_pass_packet
);
1593 last_pass_packet
= pass_packet
;
1596 xfree (pass_packet
);
1601 remote_notice_signals (ptid_t ptid
)
1603 /* Update the remote on signals to silently pass, if they've
1605 remote_pass_signals ();
1608 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
1609 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
1610 thread. If GEN is set, set the general thread, if not, then set
1611 the step/continue thread. */
1613 set_thread (struct ptid ptid
, int gen
)
1615 struct remote_state
*rs
= get_remote_state ();
1616 ptid_t state
= gen
? general_thread
: continue_thread
;
1617 char *buf
= rs
->buf
;
1618 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
1620 if (ptid_equal (state
, ptid
))
1624 *buf
++ = gen
? 'g' : 'c';
1625 if (ptid_equal (ptid
, magic_null_ptid
))
1626 xsnprintf (buf
, endbuf
- buf
, "0");
1627 else if (ptid_equal (ptid
, any_thread_ptid
))
1628 xsnprintf (buf
, endbuf
- buf
, "0");
1629 else if (ptid_equal (ptid
, minus_one_ptid
))
1630 xsnprintf (buf
, endbuf
- buf
, "-1");
1632 write_ptid (buf
, endbuf
, ptid
);
1634 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1636 general_thread
= ptid
;
1638 continue_thread
= ptid
;
1642 set_general_thread (struct ptid ptid
)
1644 set_thread (ptid
, 1);
1648 set_continue_thread (struct ptid ptid
)
1650 set_thread (ptid
, 0);
1653 /* Change the remote current process. Which thread within the process
1654 ends up selected isn't important, as long as it is the same process
1655 as what INFERIOR_PTID points to.
1657 This comes from that fact that there is no explicit notion of
1658 "selected process" in the protocol. The selected process for
1659 general operations is the process the selected general thread
1663 set_general_process (void)
1665 struct remote_state
*rs
= get_remote_state ();
1667 /* If the remote can't handle multiple processes, don't bother. */
1668 if (!remote_multi_process_p (rs
))
1671 /* We only need to change the remote current thread if it's pointing
1672 at some other process. */
1673 if (ptid_get_pid (general_thread
) != ptid_get_pid (inferior_ptid
))
1674 set_general_thread (inferior_ptid
);
1678 /* Return nonzero if the thread PTID is still alive on the remote
1682 remote_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
1684 struct remote_state
*rs
= get_remote_state ();
1687 if (ptid_equal (ptid
, magic_null_ptid
))
1688 /* The main thread is always alive. */
1691 if (ptid_get_pid (ptid
) != 0 && ptid_get_tid (ptid
) == 0)
1692 /* The main thread is always alive. This can happen after a
1693 vAttach, if the remote side doesn't support
1698 endp
= rs
->buf
+ get_remote_packet_size ();
1701 write_ptid (p
, endp
, ptid
);
1704 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1705 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
1708 /* About these extended threadlist and threadinfo packets. They are
1709 variable length packets but, the fields within them are often fixed
1710 length. They are redundent enough to send over UDP as is the
1711 remote protocol in general. There is a matching unit test module
1714 #define OPAQUETHREADBYTES 8
1716 /* a 64 bit opaque identifier */
1717 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
1719 /* WARNING: This threadref data structure comes from the remote O.S.,
1720 libstub protocol encoding, and remote.c. it is not particularly
1723 /* Right now, the internal structure is int. We want it to be bigger.
1727 typedef int gdb_threadref
; /* Internal GDB thread reference. */
1729 /* gdb_ext_thread_info is an internal GDB data structure which is
1730 equivalent to the reply of the remote threadinfo packet. */
1732 struct gdb_ext_thread_info
1734 threadref threadid
; /* External form of thread reference. */
1735 int active
; /* Has state interesting to GDB?
1737 char display
[256]; /* Brief state display, name,
1738 blocked/suspended. */
1739 char shortname
[32]; /* To be used to name threads. */
1740 char more_display
[256]; /* Long info, statistics, queue depth,
1744 /* The volume of remote transfers can be limited by submitting
1745 a mask containing bits specifying the desired information.
1746 Use a union of these values as the 'selection' parameter to
1747 get_thread_info. FIXME: Make these TAG names more thread specific.
1750 #define TAG_THREADID 1
1751 #define TAG_EXISTS 2
1752 #define TAG_DISPLAY 4
1753 #define TAG_THREADNAME 8
1754 #define TAG_MOREDISPLAY 16
1756 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1758 char *unpack_varlen_hex (char *buff
, ULONGEST
*result
);
1760 static char *unpack_nibble (char *buf
, int *val
);
1762 static char *pack_nibble (char *buf
, int nibble
);
1764 static char *pack_hex_byte (char *pkt
, int /* unsigned char */ byte
);
1766 static char *unpack_byte (char *buf
, int *value
);
1768 static char *pack_int (char *buf
, int value
);
1770 static char *unpack_int (char *buf
, int *value
);
1772 static char *unpack_string (char *src
, char *dest
, int length
);
1774 static char *pack_threadid (char *pkt
, threadref
*id
);
1776 static char *unpack_threadid (char *inbuf
, threadref
*id
);
1778 void int_to_threadref (threadref
*id
, int value
);
1780 static int threadref_to_int (threadref
*ref
);
1782 static void copy_threadref (threadref
*dest
, threadref
*src
);
1784 static int threadmatch (threadref
*dest
, threadref
*src
);
1786 static char *pack_threadinfo_request (char *pkt
, int mode
,
1789 static int remote_unpack_thread_info_response (char *pkt
,
1790 threadref
*expectedref
,
1791 struct gdb_ext_thread_info
1795 static int remote_get_threadinfo (threadref
*threadid
,
1796 int fieldset
, /*TAG mask */
1797 struct gdb_ext_thread_info
*info
);
1799 static char *pack_threadlist_request (char *pkt
, int startflag
,
1801 threadref
*nextthread
);
1803 static int parse_threadlist_response (char *pkt
,
1805 threadref
*original_echo
,
1806 threadref
*resultlist
,
1809 static int remote_get_threadlist (int startflag
,
1810 threadref
*nextthread
,
1814 threadref
*threadlist
);
1816 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
1818 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
1819 void *context
, int looplimit
);
1821 static int remote_newthread_step (threadref
*ref
, void *context
);
1824 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
1825 buffer we're allowed to write to. Returns
1826 BUF+CHARACTERS_WRITTEN. */
1829 write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
1832 struct remote_state
*rs
= get_remote_state ();
1834 if (remote_multi_process_p (rs
))
1836 pid
= ptid_get_pid (ptid
);
1838 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
1840 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
1842 tid
= ptid_get_tid (ptid
);
1844 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
1846 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
1851 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
1852 passed the last parsed char. Returns null_ptid on error. */
1855 read_ptid (char *buf
, char **obuf
)
1859 ULONGEST pid
= 0, tid
= 0;
1863 /* Multi-process ptid. */
1864 pp
= unpack_varlen_hex (p
+ 1, &pid
);
1866 error (_("invalid remote ptid: %s\n"), p
);
1869 pp
= unpack_varlen_hex (p
+ 1, &tid
);
1872 return ptid_build (pid
, 0, tid
);
1875 /* No multi-process. Just a tid. */
1876 pp
= unpack_varlen_hex (p
, &tid
);
1878 /* Since the stub is not sending a process id, then default to
1879 what's in inferior_ptid, unless it's null at this point. If so,
1880 then since there's no way to know the pid of the reported
1881 threads, use the magic number. */
1882 if (ptid_equal (inferior_ptid
, null_ptid
))
1883 pid
= ptid_get_pid (magic_null_ptid
);
1885 pid
= ptid_get_pid (inferior_ptid
);
1889 return ptid_build (pid
, 0, tid
);
1892 /* Encode 64 bits in 16 chars of hex. */
1894 static const char hexchars
[] = "0123456789abcdef";
1897 ishex (int ch
, int *val
)
1899 if ((ch
>= 'a') && (ch
<= 'f'))
1901 *val
= ch
- 'a' + 10;
1904 if ((ch
>= 'A') && (ch
<= 'F'))
1906 *val
= ch
- 'A' + 10;
1909 if ((ch
>= '0') && (ch
<= '9'))
1920 if (ch
>= 'a' && ch
<= 'f')
1921 return ch
- 'a' + 10;
1922 if (ch
>= '0' && ch
<= '9')
1924 if (ch
>= 'A' && ch
<= 'F')
1925 return ch
- 'A' + 10;
1930 stub_unpack_int (char *buff
, int fieldlength
)
1937 nibble
= stubhex (*buff
++);
1941 retval
= retval
<< 4;
1947 unpack_varlen_hex (char *buff
, /* packet to parse */
1951 ULONGEST retval
= 0;
1953 while (ishex (*buff
, &nibble
))
1956 retval
= retval
<< 4;
1957 retval
|= nibble
& 0x0f;
1964 unpack_nibble (char *buf
, int *val
)
1966 *val
= fromhex (*buf
++);
1971 pack_nibble (char *buf
, int nibble
)
1973 *buf
++ = hexchars
[(nibble
& 0x0f)];
1978 pack_hex_byte (char *pkt
, int byte
)
1980 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
1981 *pkt
++ = hexchars
[(byte
& 0xf)];
1986 unpack_byte (char *buf
, int *value
)
1988 *value
= stub_unpack_int (buf
, 2);
1993 pack_int (char *buf
, int value
)
1995 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
1996 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
1997 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
1998 buf
= pack_hex_byte (buf
, (value
& 0xff));
2003 unpack_int (char *buf
, int *value
)
2005 *value
= stub_unpack_int (buf
, 8);
2009 #if 0 /* Currently unused, uncomment when needed. */
2010 static char *pack_string (char *pkt
, char *string
);
2013 pack_string (char *pkt
, char *string
)
2018 len
= strlen (string
);
2020 len
= 200; /* Bigger than most GDB packets, junk??? */
2021 pkt
= pack_hex_byte (pkt
, len
);
2025 if ((ch
== '\0') || (ch
== '#'))
2026 ch
= '*'; /* Protect encapsulation. */
2031 #endif /* 0 (unused) */
2034 unpack_string (char *src
, char *dest
, int length
)
2043 pack_threadid (char *pkt
, threadref
*id
)
2046 unsigned char *altid
;
2048 altid
= (unsigned char *) id
;
2049 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
2051 pkt
= pack_hex_byte (pkt
, *altid
++);
2057 unpack_threadid (char *inbuf
, threadref
*id
)
2060 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
2063 altref
= (char *) id
;
2065 while (inbuf
< limit
)
2067 x
= stubhex (*inbuf
++);
2068 y
= stubhex (*inbuf
++);
2069 *altref
++ = (x
<< 4) | y
;
2074 /* Externally, threadrefs are 64 bits but internally, they are still
2075 ints. This is due to a mismatch of specifications. We would like
2076 to use 64bit thread references internally. This is an adapter
2080 int_to_threadref (threadref
*id
, int value
)
2082 unsigned char *scan
;
2084 scan
= (unsigned char *) id
;
2090 *scan
++ = (value
>> 24) & 0xff;
2091 *scan
++ = (value
>> 16) & 0xff;
2092 *scan
++ = (value
>> 8) & 0xff;
2093 *scan
++ = (value
& 0xff);
2097 threadref_to_int (threadref
*ref
)
2100 unsigned char *scan
;
2106 value
= (value
<< 8) | ((*scan
++) & 0xff);
2111 copy_threadref (threadref
*dest
, threadref
*src
)
2114 unsigned char *csrc
, *cdest
;
2116 csrc
= (unsigned char *) src
;
2117 cdest
= (unsigned char *) dest
;
2124 threadmatch (threadref
*dest
, threadref
*src
)
2126 /* Things are broken right now, so just assume we got a match. */
2128 unsigned char *srcp
, *destp
;
2130 srcp
= (char *) src
;
2131 destp
= (char *) dest
;
2135 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
2142 threadid:1, # always request threadid
2149 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2152 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
2154 *pkt
++ = 'q'; /* Info Query */
2155 *pkt
++ = 'P'; /* process or thread info */
2156 pkt
= pack_int (pkt
, mode
); /* mode */
2157 pkt
= pack_threadid (pkt
, id
); /* threadid */
2158 *pkt
= '\0'; /* terminate */
2162 /* These values tag the fields in a thread info response packet. */
2163 /* Tagging the fields allows us to request specific fields and to
2164 add more fields as time goes by. */
2166 #define TAG_THREADID 1 /* Echo the thread identifier. */
2167 #define TAG_EXISTS 2 /* Is this process defined enough to
2168 fetch registers and its stack? */
2169 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2170 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2171 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2175 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
2176 struct gdb_ext_thread_info
*info
)
2178 struct remote_state
*rs
= get_remote_state ();
2182 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
2185 /* info->threadid = 0; FIXME: implement zero_threadref. */
2187 info
->display
[0] = '\0';
2188 info
->shortname
[0] = '\0';
2189 info
->more_display
[0] = '\0';
2191 /* Assume the characters indicating the packet type have been
2193 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
2194 pkt
= unpack_threadid (pkt
, &ref
);
2197 warning (_("Incomplete response to threadinfo request."));
2198 if (!threadmatch (&ref
, expectedref
))
2199 { /* This is an answer to a different request. */
2200 warning (_("ERROR RMT Thread info mismatch."));
2203 copy_threadref (&info
->threadid
, &ref
);
2205 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2207 /* Packets are terminated with nulls. */
2208 while ((pkt
< limit
) && mask
&& *pkt
)
2210 pkt
= unpack_int (pkt
, &tag
); /* tag */
2211 pkt
= unpack_byte (pkt
, &length
); /* length */
2212 if (!(tag
& mask
)) /* Tags out of synch with mask. */
2214 warning (_("ERROR RMT: threadinfo tag mismatch."));
2218 if (tag
== TAG_THREADID
)
2222 warning (_("ERROR RMT: length of threadid is not 16."));
2226 pkt
= unpack_threadid (pkt
, &ref
);
2227 mask
= mask
& ~TAG_THREADID
;
2230 if (tag
== TAG_EXISTS
)
2232 info
->active
= stub_unpack_int (pkt
, length
);
2234 mask
= mask
& ~(TAG_EXISTS
);
2237 warning (_("ERROR RMT: 'exists' length too long."));
2243 if (tag
== TAG_THREADNAME
)
2245 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
2246 mask
= mask
& ~TAG_THREADNAME
;
2249 if (tag
== TAG_DISPLAY
)
2251 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
2252 mask
= mask
& ~TAG_DISPLAY
;
2255 if (tag
== TAG_MOREDISPLAY
)
2257 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
2258 mask
= mask
& ~TAG_MOREDISPLAY
;
2261 warning (_("ERROR RMT: unknown thread info tag."));
2262 break; /* Not a tag we know about. */
2268 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
2269 struct gdb_ext_thread_info
*info
)
2271 struct remote_state
*rs
= get_remote_state ();
2274 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
2276 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2278 if (rs
->buf
[0] == '\0')
2281 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
2286 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2289 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
2290 threadref
*nextthread
)
2292 *pkt
++ = 'q'; /* info query packet */
2293 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
2294 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
2295 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
2296 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
2301 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2304 parse_threadlist_response (char *pkt
, int result_limit
,
2305 threadref
*original_echo
, threadref
*resultlist
,
2308 struct remote_state
*rs
= get_remote_state ();
2310 int count
, resultcount
, done
;
2313 /* Assume the 'q' and 'M chars have been stripped. */
2314 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
2315 /* done parse past here */
2316 pkt
= unpack_byte (pkt
, &count
); /* count field */
2317 pkt
= unpack_nibble (pkt
, &done
);
2318 /* The first threadid is the argument threadid. */
2319 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
2320 while ((count
-- > 0) && (pkt
< limit
))
2322 pkt
= unpack_threadid (pkt
, resultlist
++);
2323 if (resultcount
++ >= result_limit
)
2332 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
2333 int *done
, int *result_count
, threadref
*threadlist
)
2335 struct remote_state
*rs
= get_remote_state ();
2336 static threadref echo_nextthread
;
2339 /* Trancate result limit to be smaller than the packet size. */
2340 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10) >= get_remote_packet_size ())
2341 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
2343 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
2345 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2347 if (*rs
->buf
== '\0')
2351 parse_threadlist_response (rs
->buf
+ 2, result_limit
, &echo_nextthread
,
2354 if (!threadmatch (&echo_nextthread
, nextthread
))
2356 /* FIXME: This is a good reason to drop the packet. */
2357 /* Possably, there is a duplicate response. */
2359 retransmit immediatly - race conditions
2360 retransmit after timeout - yes
2362 wait for packet, then exit
2364 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2365 return 0; /* I choose simply exiting. */
2367 if (*result_count
<= 0)
2371 warning (_("RMT ERROR : failed to get remote thread list."));
2374 return result
; /* break; */
2376 if (*result_count
> result_limit
)
2379 warning (_("RMT ERROR: threadlist response longer than requested."));
2385 /* This is the interface between remote and threads, remotes upper
2388 /* remote_find_new_threads retrieves the thread list and for each
2389 thread in the list, looks up the thread in GDB's internal list,
2390 adding the thread if it does not already exist. This involves
2391 getting partial thread lists from the remote target so, polling the
2392 quit_flag is required. */
2395 /* About this many threadisds fit in a packet. */
2397 #define MAXTHREADLISTRESULTS 32
2400 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
2403 int done
, i
, result_count
;
2407 static threadref nextthread
;
2408 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
2413 if (loopcount
++ > looplimit
)
2416 warning (_("Remote fetch threadlist -infinite loop-."));
2419 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
2420 &done
, &result_count
, resultthreadlist
))
2425 /* Clear for later iterations. */
2427 /* Setup to resume next batch of thread references, set nextthread. */
2428 if (result_count
>= 1)
2429 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
2431 while (result_count
--)
2432 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
2439 remote_newthread_step (threadref
*ref
, void *context
)
2441 int pid
= ptid_get_pid (inferior_ptid
);
2442 ptid_t ptid
= ptid_build (pid
, 0, threadref_to_int (ref
));
2444 if (!in_thread_list (ptid
))
2446 return 1; /* continue iterator */
2449 #define CRAZY_MAX_THREADS 1000
2452 remote_current_thread (ptid_t oldpid
)
2454 struct remote_state
*rs
= get_remote_state ();
2457 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2458 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
2459 return read_ptid (&rs
->buf
[2], NULL
);
2464 /* Find new threads for info threads command.
2465 * Original version, using John Metzler's thread protocol.
2469 remote_find_new_threads (void)
2471 remote_threadlist_iterator (remote_newthread_step
, 0,
2475 #if defined(HAVE_LIBEXPAT)
2477 typedef struct thread_item
2483 DEF_VEC_O(thread_item_t
);
2485 struct threads_parsing_context
2487 VEC (thread_item_t
) *items
;
2491 start_thread (struct gdb_xml_parser
*parser
,
2492 const struct gdb_xml_element
*element
,
2493 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
2495 struct threads_parsing_context
*data
= user_data
;
2497 struct thread_item item
;
2500 id
= VEC_index (gdb_xml_value_s
, attributes
, 0)->value
;
2501 item
.ptid
= read_ptid (id
, NULL
);
2503 if (VEC_length (gdb_xml_value_s
, attributes
) > 1)
2504 item
.core
= *(ULONGEST
*) VEC_index (gdb_xml_value_s
, attributes
, 1)->value
;
2510 VEC_safe_push (thread_item_t
, data
->items
, &item
);
2514 end_thread (struct gdb_xml_parser
*parser
,
2515 const struct gdb_xml_element
*element
,
2516 void *user_data
, const char *body_text
)
2518 struct threads_parsing_context
*data
= user_data
;
2520 if (body_text
&& *body_text
)
2521 VEC_last (thread_item_t
, data
->items
)->extra
= xstrdup (body_text
);
2524 const struct gdb_xml_attribute thread_attributes
[] = {
2525 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
2526 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
2527 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
2530 const struct gdb_xml_element thread_children
[] = {
2531 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
2534 const struct gdb_xml_element threads_children
[] = {
2535 { "thread", thread_attributes
, thread_children
,
2536 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
2537 start_thread
, end_thread
},
2538 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
2541 const struct gdb_xml_element threads_elements
[] = {
2542 { "threads", NULL
, threads_children
,
2543 GDB_XML_EF_NONE
, NULL
, NULL
},
2544 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
2547 /* Discard the contents of the constructed thread info context. */
2550 clear_threads_parsing_context (void *p
)
2552 struct threads_parsing_context
*context
= p
;
2554 struct thread_item
*item
;
2556 for (i
= 0; VEC_iterate (thread_item_t
, context
->items
, i
, item
); ++i
)
2557 xfree (item
->extra
);
2559 VEC_free (thread_item_t
, context
->items
);
2565 * Find all threads for info threads command.
2566 * Uses new thread protocol contributed by Cisco.
2567 * Falls back and attempts to use the older method (above)
2568 * if the target doesn't respond to the new method.
2572 remote_threads_info (struct target_ops
*ops
)
2574 struct remote_state
*rs
= get_remote_state ();
2578 if (remote_desc
== 0) /* paranoia */
2579 error (_("Command can only be used when connected to the remote target."));
2581 #if defined(HAVE_LIBEXPAT)
2582 if (remote_protocol_packets
[PACKET_qXfer_threads
].support
== PACKET_ENABLE
)
2584 char *xml
= target_read_stralloc (¤t_target
,
2585 TARGET_OBJECT_THREADS
, NULL
);
2587 struct cleanup
*back_to
= make_cleanup (xfree
, xml
);
2590 struct gdb_xml_parser
*parser
;
2591 struct threads_parsing_context context
;
2592 struct cleanup
*clear_parsing_context
;
2595 /* Note: this parser cleanup is already guarded by BACK_TO
2597 parser
= gdb_xml_create_parser_and_cleanup (_("threads"),
2601 gdb_xml_use_dtd (parser
, "threads.dtd");
2603 clear_parsing_context
2604 = make_cleanup (clear_threads_parsing_context
, &context
);
2606 if (gdb_xml_parse (parser
, xml
) == 0)
2609 struct thread_item
*item
;
2611 for (i
= 0; VEC_iterate (thread_item_t
, context
.items
, i
, item
); ++i
)
2613 if (!ptid_equal (item
->ptid
, null_ptid
))
2615 struct private_thread_info
*info
;
2616 /* In non-stop mode, we assume new found threads
2617 are running until proven otherwise with a
2618 stop reply. In all-stop, we can only get
2619 here if all threads are stopped. */
2620 int running
= non_stop
? 1 : 0;
2622 remote_notice_new_inferior (item
->ptid
, running
);
2624 info
= demand_private_info (item
->ptid
);
2625 info
->core
= item
->core
;
2626 info
->extra
= item
->extra
;
2632 do_cleanups (clear_parsing_context
);
2635 do_cleanups (back_to
);
2640 if (use_threadinfo_query
)
2642 putpkt ("qfThreadInfo");
2643 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2645 if (bufp
[0] != '\0') /* q packet recognized */
2647 while (*bufp
++ == 'm') /* reply contains one or more TID */
2651 new_thread
= read_ptid (bufp
, &bufp
);
2652 if (!ptid_equal (new_thread
, null_ptid
))
2654 /* In non-stop mode, we assume new found threads
2655 are running until proven otherwise with a
2656 stop reply. In all-stop, we can only get
2657 here if all threads are stopped. */
2658 int running
= non_stop
? 1 : 0;
2660 remote_notice_new_inferior (new_thread
, running
);
2663 while (*bufp
++ == ','); /* comma-separated list */
2664 putpkt ("qsThreadInfo");
2665 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2672 /* Only qfThreadInfo is supported in non-stop mode. */
2676 /* Else fall back to old method based on jmetzler protocol. */
2677 use_threadinfo_query
= 0;
2678 remote_find_new_threads ();
2683 * Collect a descriptive string about the given thread.
2684 * The target may say anything it wants to about the thread
2685 * (typically info about its blocked / runnable state, name, etc.).
2686 * This string will appear in the info threads display.
2688 * Optional: targets are not required to implement this function.
2692 remote_threads_extra_info (struct thread_info
*tp
)
2694 struct remote_state
*rs
= get_remote_state ();
2698 struct gdb_ext_thread_info threadinfo
;
2699 static char display_buf
[100]; /* arbitrary... */
2700 int n
= 0; /* position in display_buf */
2702 if (remote_desc
== 0) /* paranoia */
2703 internal_error (__FILE__
, __LINE__
,
2704 _("remote_threads_extra_info"));
2706 if (ptid_equal (tp
->ptid
, magic_null_ptid
)
2707 || (ptid_get_pid (tp
->ptid
) != 0 && ptid_get_tid (tp
->ptid
) == 0))
2708 /* This is the main thread which was added by GDB. The remote
2709 server doesn't know about it. */
2712 if (remote_protocol_packets
[PACKET_qXfer_threads
].support
== PACKET_ENABLE
)
2714 struct thread_info
*info
= find_thread_ptid (tp
->ptid
);
2716 if (info
&& info
->private)
2717 return info
->private->extra
;
2722 if (use_threadextra_query
)
2725 char *endb
= rs
->buf
+ get_remote_packet_size ();
2727 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
2729 write_ptid (b
, endb
, tp
->ptid
);
2732 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2733 if (rs
->buf
[0] != 0)
2735 n
= min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
2736 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
2737 display_buf
[result
] = '\0';
2742 /* If the above query fails, fall back to the old method. */
2743 use_threadextra_query
= 0;
2744 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
2745 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
2746 int_to_threadref (&id
, ptid_get_tid (tp
->ptid
));
2747 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
2748 if (threadinfo
.active
)
2750 if (*threadinfo
.shortname
)
2751 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
2752 " Name: %s,", threadinfo
.shortname
);
2753 if (*threadinfo
.display
)
2754 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2755 " State: %s,", threadinfo
.display
);
2756 if (*threadinfo
.more_display
)
2757 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2758 " Priority: %s", threadinfo
.more_display
);
2762 /* For purely cosmetic reasons, clear up trailing commas. */
2763 if (',' == display_buf
[n
-1])
2764 display_buf
[n
-1] = ' ';
2772 /* Implement the to_get_ada_task_ptid function for the remote targets. */
2775 remote_get_ada_task_ptid (long lwp
, long thread
)
2777 return ptid_build (ptid_get_pid (inferior_ptid
), 0, lwp
);
2781 /* Restart the remote side; this is an extended protocol operation. */
2784 extended_remote_restart (void)
2786 struct remote_state
*rs
= get_remote_state ();
2788 /* Send the restart command; for reasons I don't understand the
2789 remote side really expects a number after the "R". */
2790 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
2793 remote_fileio_reset ();
2796 /* Clean up connection to a remote debugger. */
2799 remote_close (int quitting
)
2801 if (remote_desc
== NULL
)
2802 return; /* already closed */
2804 /* Make sure we leave stdin registered in the event loop, and we
2805 don't leave the async SIGINT signal handler installed. */
2806 remote_terminal_ours ();
2808 serial_close (remote_desc
);
2811 /* We don't have a connection to the remote stub anymore. Get rid
2812 of all the inferiors and their threads we were controlling. */
2813 discard_all_inferiors ();
2814 inferior_ptid
= null_ptid
;
2816 /* We're no longer interested in any of these events. */
2817 discard_pending_stop_replies (-1);
2819 if (remote_async_inferior_event_token
)
2820 delete_async_event_handler (&remote_async_inferior_event_token
);
2821 if (remote_async_get_pending_events_token
)
2822 delete_async_event_handler (&remote_async_get_pending_events_token
);
2825 /* Query the remote side for the text, data and bss offsets. */
2830 struct remote_state
*rs
= get_remote_state ();
2833 int lose
, num_segments
= 0, do_sections
, do_segments
;
2834 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
2835 struct section_offsets
*offs
;
2836 struct symfile_segment_data
*data
;
2838 if (symfile_objfile
== NULL
)
2841 putpkt ("qOffsets");
2842 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2845 if (buf
[0] == '\000')
2846 return; /* Return silently. Stub doesn't support
2850 warning (_("Remote failure reply: %s"), buf
);
2854 /* Pick up each field in turn. This used to be done with scanf, but
2855 scanf will make trouble if CORE_ADDR size doesn't match
2856 conversion directives correctly. The following code will work
2857 with any size of CORE_ADDR. */
2858 text_addr
= data_addr
= bss_addr
= 0;
2862 if (strncmp (ptr
, "Text=", 5) == 0)
2865 /* Don't use strtol, could lose on big values. */
2866 while (*ptr
&& *ptr
!= ';')
2867 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2869 if (strncmp (ptr
, ";Data=", 6) == 0)
2872 while (*ptr
&& *ptr
!= ';')
2873 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2878 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
2881 while (*ptr
&& *ptr
!= ';')
2882 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
2884 if (bss_addr
!= data_addr
)
2885 warning (_("Target reported unsupported offsets: %s"), buf
);
2890 else if (strncmp (ptr
, "TextSeg=", 8) == 0)
2893 /* Don't use strtol, could lose on big values. */
2894 while (*ptr
&& *ptr
!= ';')
2895 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2898 if (strncmp (ptr
, ";DataSeg=", 9) == 0)
2901 while (*ptr
&& *ptr
!= ';')
2902 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2910 error (_("Malformed response to offset query, %s"), buf
);
2911 else if (*ptr
!= '\0')
2912 warning (_("Target reported unsupported offsets: %s"), buf
);
2914 offs
= ((struct section_offsets
*)
2915 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
2916 memcpy (offs
, symfile_objfile
->section_offsets
,
2917 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
2919 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
2920 do_segments
= (data
!= NULL
);
2921 do_sections
= num_segments
== 0;
2923 if (num_segments
> 0)
2925 segments
[0] = text_addr
;
2926 segments
[1] = data_addr
;
2928 /* If we have two segments, we can still try to relocate everything
2929 by assuming that the .text and .data offsets apply to the whole
2930 text and data segments. Convert the offsets given in the packet
2931 to base addresses for symfile_map_offsets_to_segments. */
2932 else if (data
&& data
->num_segments
== 2)
2934 segments
[0] = data
->segment_bases
[0] + text_addr
;
2935 segments
[1] = data
->segment_bases
[1] + data_addr
;
2938 /* If the object file has only one segment, assume that it is text
2939 rather than data; main programs with no writable data are rare,
2940 but programs with no code are useless. Of course the code might
2941 have ended up in the data segment... to detect that we would need
2942 the permissions here. */
2943 else if (data
&& data
->num_segments
== 1)
2945 segments
[0] = data
->segment_bases
[0] + text_addr
;
2948 /* There's no way to relocate by segment. */
2954 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
2955 offs
, num_segments
, segments
);
2957 if (ret
== 0 && !do_sections
)
2958 error (_("Can not handle qOffsets TextSeg response with this symbol file"));
2965 free_symfile_segment_data (data
);
2969 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
2971 /* This is a temporary kludge to force data and bss to use the same offsets
2972 because that's what nlmconv does now. The real solution requires changes
2973 to the stub and remote.c that I don't have time to do right now. */
2975 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
2976 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
2979 objfile_relocate (symfile_objfile
, offs
);
2982 /* Callback for iterate_over_threads. Set the STOP_REQUESTED flags in
2983 threads we know are stopped already. This is used during the
2984 initial remote connection in non-stop mode --- threads that are
2985 reported as already being stopped are left stopped. */
2988 set_stop_requested_callback (struct thread_info
*thread
, void *data
)
2990 /* If we have a stop reply for this thread, it must be stopped. */
2991 if (peek_stop_reply (thread
->ptid
))
2992 set_stop_requested (thread
->ptid
, 1);
2997 /* Stub for catch_exception. */
2999 struct start_remote_args
3003 /* The current target. */
3004 struct target_ops
*target
;
3006 /* Non-zero if this is an extended-remote target. */
3010 /* Send interrupt_sequence to remote target. */
3012 send_interrupt_sequence ()
3014 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
3015 serial_write (remote_desc
, "\x03", 1);
3016 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
3017 serial_send_break (remote_desc
);
3018 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
3020 serial_send_break (remote_desc
);
3021 serial_write (remote_desc
, "g", 1);
3024 internal_error (__FILE__
, __LINE__
,
3025 _("Invalid value for interrupt_sequence_mode: %s."),
3026 interrupt_sequence_mode
);
3030 remote_start_remote (struct ui_out
*uiout
, void *opaque
)
3032 struct start_remote_args
*args
= opaque
;
3033 struct remote_state
*rs
= get_remote_state ();
3034 struct packet_config
*noack_config
;
3035 char *wait_status
= NULL
;
3037 immediate_quit
++; /* Allow user to interrupt it. */
3039 /* Ack any packet which the remote side has already sent. */
3040 serial_write (remote_desc
, "+", 1);
3042 if (interrupt_on_connect
)
3043 send_interrupt_sequence ();
3045 /* The first packet we send to the target is the optional "supported
3046 packets" request. If the target can answer this, it will tell us
3047 which later probes to skip. */
3048 remote_query_supported ();
3050 /* Next, we possibly activate noack mode.
3052 If the QStartNoAckMode packet configuration is set to AUTO,
3053 enable noack mode if the stub reported a wish for it with
3056 If set to TRUE, then enable noack mode even if the stub didn't
3057 report it in qSupported. If the stub doesn't reply OK, the
3058 session ends with an error.
3060 If FALSE, then don't activate noack mode, regardless of what the
3061 stub claimed should be the default with qSupported. */
3063 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
3065 if (noack_config
->detect
== AUTO_BOOLEAN_TRUE
3066 || (noack_config
->detect
== AUTO_BOOLEAN_AUTO
3067 && noack_config
->support
== PACKET_ENABLE
))
3069 putpkt ("QStartNoAckMode");
3070 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3071 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
3075 if (args
->extended_p
)
3077 /* Tell the remote that we are using the extended protocol. */
3079 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3082 /* Next, if the target can specify a description, read it. We do
3083 this before anything involving memory or registers. */
3084 target_find_description ();
3086 /* Next, now that we know something about the target, update the
3087 address spaces in the program spaces. */
3088 update_address_spaces ();
3090 /* On OSs where the list of libraries is global to all
3091 processes, we fetch them early. */
3092 if (gdbarch_has_global_solist (target_gdbarch
))
3093 solib_add (NULL
, args
->from_tty
, args
->target
, auto_solib_add
);
3097 if (!rs
->non_stop_aware
)
3098 error (_("Non-stop mode requested, but remote does not support non-stop"));
3100 putpkt ("QNonStop:1");
3101 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3103 if (strcmp (rs
->buf
, "OK") != 0)
3104 error ("Remote refused setting non-stop mode with: %s", rs
->buf
);
3106 /* Find about threads and processes the stub is already
3107 controlling. We default to adding them in the running state.
3108 The '?' query below will then tell us about which threads are
3110 remote_threads_info (args
->target
);
3112 else if (rs
->non_stop_aware
)
3114 /* Don't assume that the stub can operate in all-stop mode.
3115 Request it explicitely. */
3116 putpkt ("QNonStop:0");
3117 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3119 if (strcmp (rs
->buf
, "OK") != 0)
3120 error ("Remote refused setting all-stop mode with: %s", rs
->buf
);
3123 /* Check whether the target is running now. */
3125 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3129 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
3131 if (!args
->extended_p
)
3132 error (_("The target is not running (try extended-remote?)"));
3134 /* We're connected, but not running. Drop out before we
3135 call start_remote. */
3140 /* Save the reply for later. */
3141 wait_status
= alloca (strlen (rs
->buf
) + 1);
3142 strcpy (wait_status
, rs
->buf
);
3145 /* Let the stub know that we want it to return the thread. */
3146 set_continue_thread (minus_one_ptid
);
3148 /* Without this, some commands which require an active target
3149 (such as kill) won't work. This variable serves (at least)
3150 double duty as both the pid of the target process (if it has
3151 such), and as a flag indicating that a target is active.
3152 These functions should be split out into seperate variables,
3153 especially since GDB will someday have a notion of debugging
3154 several processes. */
3155 inferior_ptid
= magic_null_ptid
;
3157 /* Now, if we have thread information, update inferior_ptid. */
3158 inferior_ptid
= remote_current_thread (inferior_ptid
);
3160 remote_add_inferior (ptid_get_pid (inferior_ptid
), -1);
3162 /* Always add the main thread. */
3163 add_thread_silent (inferior_ptid
);
3165 get_offsets (); /* Get text, data & bss offsets. */
3167 /* If we could not find a description using qXfer, and we know
3168 how to do it some other way, try again. This is not
3169 supported for non-stop; it could be, but it is tricky if
3170 there are no stopped threads when we connect. */
3171 if (remote_read_description_p (args
->target
)
3172 && gdbarch_target_desc (target_gdbarch
) == NULL
)
3174 target_clear_description ();
3175 target_find_description ();
3178 /* Use the previously fetched status. */
3179 gdb_assert (wait_status
!= NULL
);
3180 strcpy (rs
->buf
, wait_status
);
3181 rs
->cached_wait_status
= 1;
3184 start_remote (args
->from_tty
); /* Initialize gdb process mechanisms. */
3188 /* Clear WFI global state. Do this before finding about new
3189 threads and inferiors, and setting the current inferior.
3190 Otherwise we would clear the proceed status of the current
3191 inferior when we want its stop_soon state to be preserved
3192 (see notice_new_inferior). */
3193 init_wait_for_inferior ();
3195 /* In non-stop, we will either get an "OK", meaning that there
3196 are no stopped threads at this time; or, a regular stop
3197 reply. In the latter case, there may be more than one thread
3198 stopped --- we pull them all out using the vStopped
3200 if (strcmp (rs
->buf
, "OK") != 0)
3202 struct stop_reply
*stop_reply
;
3203 struct cleanup
*old_chain
;
3205 stop_reply
= stop_reply_xmalloc ();
3206 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
3208 remote_parse_stop_reply (rs
->buf
, stop_reply
);
3209 discard_cleanups (old_chain
);
3211 /* get_pending_stop_replies acks this one, and gets the rest
3213 pending_stop_reply
= stop_reply
;
3214 remote_get_pending_stop_replies ();
3216 /* Make sure that threads that were stopped remain
3218 iterate_over_threads (set_stop_requested_callback
, NULL
);
3221 if (target_can_async_p ())
3222 target_async (inferior_event_handler
, 0);
3224 if (thread_count () == 0)
3226 if (!args
->extended_p
)
3227 error (_("The target is not running (try extended-remote?)"));
3229 /* We're connected, but not running. Drop out before we
3230 call start_remote. */
3234 /* Let the stub know that we want it to return the thread. */
3236 /* Force the stub to choose a thread. */
3237 set_general_thread (null_ptid
);
3240 inferior_ptid
= remote_current_thread (minus_one_ptid
);
3241 if (ptid_equal (inferior_ptid
, minus_one_ptid
))
3242 error (_("remote didn't report the current thread in non-stop mode"));
3244 get_offsets (); /* Get text, data & bss offsets. */
3246 /* In non-stop mode, any cached wait status will be stored in
3247 the stop reply queue. */
3248 gdb_assert (wait_status
== NULL
);
3250 /* Update the remote on signals to silently pass, or more
3251 importantly, which to not ignore, in case a previous session
3252 had set some different set of signals to be ignored. */
3253 remote_pass_signals ();
3256 /* If we connected to a live target, do some additional setup. */
3257 if (target_has_execution
)
3259 if (exec_bfd
) /* No use without an exec file. */
3260 remote_check_symbols (symfile_objfile
);
3263 /* Possibly the target has been engaged in a trace run started
3264 previously; find out where things are at. */
3265 if (remote_get_trace_status (current_trace_status ()) != -1)
3267 struct uploaded_tp
*uploaded_tps
= NULL
;
3268 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
3270 if (current_trace_status ()->running
)
3271 printf_filtered (_("Trace is already running on the target.\n"));
3273 /* Get trace state variables first, they may be checked when
3274 parsing uploaded commands. */
3276 remote_upload_trace_state_variables (&uploaded_tsvs
);
3278 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
3280 remote_upload_tracepoints (&uploaded_tps
);
3282 merge_uploaded_tracepoints (&uploaded_tps
);
3285 /* If breakpoints are global, insert them now. */
3286 if (gdbarch_has_global_breakpoints (target_gdbarch
)
3287 && breakpoints_always_inserted_mode ())
3288 insert_breakpoints ();
3291 /* Open a connection to a remote debugger.
3292 NAME is the filename used for communication. */
3295 remote_open (char *name
, int from_tty
)
3297 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
3300 /* Open a connection to a remote debugger using the extended
3301 remote gdb protocol. NAME is the filename used for communication. */
3304 extended_remote_open (char *name
, int from_tty
)
3306 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
3309 /* Generic code for opening a connection to a remote target. */
3312 init_all_packet_configs (void)
3316 for (i
= 0; i
< PACKET_MAX
; i
++)
3317 update_packet_config (&remote_protocol_packets
[i
]);
3320 /* Symbol look-up. */
3323 remote_check_symbols (struct objfile
*objfile
)
3325 struct remote_state
*rs
= get_remote_state ();
3326 char *msg
, *reply
, *tmp
;
3327 struct minimal_symbol
*sym
;
3330 if (remote_protocol_packets
[PACKET_qSymbol
].support
== PACKET_DISABLE
)
3333 /* Make sure the remote is pointing at the right process. */
3334 set_general_process ();
3336 /* Allocate a message buffer. We can't reuse the input buffer in RS,
3337 because we need both at the same time. */
3338 msg
= alloca (get_remote_packet_size ());
3340 /* Invite target to request symbol lookups. */
3342 putpkt ("qSymbol::");
3343 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3344 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSymbol
]);
3347 while (strncmp (reply
, "qSymbol:", 8) == 0)
3350 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
3352 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
3354 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
3357 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
3358 CORE_ADDR sym_addr
= SYMBOL_VALUE_ADDRESS (sym
);
3360 /* If this is a function address, return the start of code
3361 instead of any data function descriptor. */
3362 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch
,
3366 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
3367 phex_nz (sym_addr
, addr_size
), &reply
[8]);
3371 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3376 static struct serial
*
3377 remote_serial_open (char *name
)
3379 static int udp_warning
= 0;
3381 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
3382 of in ser-tcp.c, because it is the remote protocol assuming that the
3383 serial connection is reliable and not the serial connection promising
3385 if (!udp_warning
&& strncmp (name
, "udp:", 4) == 0)
3388 The remote protocol may be unreliable over UDP.\n\
3389 Some events may be lost, rendering further debugging impossible."));
3393 return serial_open (name
);
3396 /* This type describes each known response to the qSupported
3398 struct protocol_feature
3400 /* The name of this protocol feature. */
3403 /* The default for this protocol feature. */
3404 enum packet_support default_support
;
3406 /* The function to call when this feature is reported, or after
3407 qSupported processing if the feature is not supported.
3408 The first argument points to this structure. The second
3409 argument indicates whether the packet requested support be
3410 enabled, disabled, or probed (or the default, if this function
3411 is being called at the end of processing and this feature was
3412 not reported). The third argument may be NULL; if not NULL, it
3413 is a NUL-terminated string taken from the packet following
3414 this feature's name and an equals sign. */
3415 void (*func
) (const struct protocol_feature
*, enum packet_support
,
3418 /* The corresponding packet for this feature. Only used if
3419 FUNC is remote_supported_packet. */
3424 remote_supported_packet (const struct protocol_feature
*feature
,
3425 enum packet_support support
,
3426 const char *argument
)
3430 warning (_("Remote qSupported response supplied an unexpected value for"
3431 " \"%s\"."), feature
->name
);
3435 if (remote_protocol_packets
[feature
->packet
].support
3436 == PACKET_SUPPORT_UNKNOWN
)
3437 remote_protocol_packets
[feature
->packet
].support
= support
;
3441 remote_packet_size (const struct protocol_feature
*feature
,
3442 enum packet_support support
, const char *value
)
3444 struct remote_state
*rs
= get_remote_state ();
3449 if (support
!= PACKET_ENABLE
)
3452 if (value
== NULL
|| *value
== '\0')
3454 warning (_("Remote target reported \"%s\" without a size."),
3460 packet_size
= strtol (value
, &value_end
, 16);
3461 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
3463 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
3464 feature
->name
, value
);
3468 if (packet_size
> MAX_REMOTE_PACKET_SIZE
)
3470 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
3471 packet_size
, MAX_REMOTE_PACKET_SIZE
);
3472 packet_size
= MAX_REMOTE_PACKET_SIZE
;
3475 /* Record the new maximum packet size. */
3476 rs
->explicit_packet_size
= packet_size
;
3480 remote_multi_process_feature (const struct protocol_feature
*feature
,
3481 enum packet_support support
, const char *value
)
3483 struct remote_state
*rs
= get_remote_state ();
3485 rs
->multi_process_aware
= (support
== PACKET_ENABLE
);
3489 remote_non_stop_feature (const struct protocol_feature
*feature
,
3490 enum packet_support support
, const char *value
)
3492 struct remote_state
*rs
= get_remote_state ();
3494 rs
->non_stop_aware
= (support
== PACKET_ENABLE
);
3498 remote_cond_tracepoint_feature (const struct protocol_feature
*feature
,
3499 enum packet_support support
,
3502 struct remote_state
*rs
= get_remote_state ();
3504 rs
->cond_tracepoints
= (support
== PACKET_ENABLE
);
3508 remote_fast_tracepoint_feature (const struct protocol_feature
*feature
,
3509 enum packet_support support
,
3512 struct remote_state
*rs
= get_remote_state ();
3514 rs
->fast_tracepoints
= (support
== PACKET_ENABLE
);
3518 remote_disconnected_tracing_feature (const struct protocol_feature
*feature
,
3519 enum packet_support support
,
3522 struct remote_state
*rs
= get_remote_state ();
3524 rs
->disconnected_tracing
= (support
== PACKET_ENABLE
);
3527 static struct protocol_feature remote_protocol_features
[] = {
3528 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
3529 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
3530 PACKET_qXfer_auxv
},
3531 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
3532 PACKET_qXfer_features
},
3533 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
3534 PACKET_qXfer_libraries
},
3535 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
3536 PACKET_qXfer_memory_map
},
3537 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
3538 PACKET_qXfer_spu_read
},
3539 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
3540 PACKET_qXfer_spu_write
},
3541 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
3542 PACKET_qXfer_osdata
},
3543 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
3544 PACKET_qXfer_threads
},
3545 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
3546 PACKET_QPassSignals
},
3547 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
3548 PACKET_QStartNoAckMode
},
3549 { "multiprocess", PACKET_DISABLE
, remote_multi_process_feature
, -1 },
3550 { "QNonStop", PACKET_DISABLE
, remote_non_stop_feature
, -1 },
3551 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
3552 PACKET_qXfer_siginfo_read
},
3553 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
3554 PACKET_qXfer_siginfo_write
},
3555 { "ConditionalTracepoints", PACKET_DISABLE
, remote_cond_tracepoint_feature
,
3556 PACKET_ConditionalTracepoints
},
3557 { "FastTracepoints", PACKET_DISABLE
, remote_fast_tracepoint_feature
,
3558 PACKET_FastTracepoints
},
3559 { "DisconnectedTracing", PACKET_DISABLE
, remote_disconnected_tracing_feature
,
3561 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
3563 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
3565 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
3566 PACKET_TracepointSource
},
3569 static char *remote_support_xml
;
3571 /* Register string appended to "xmlRegisters=" in qSupported query. */
3574 register_remote_support_xml (const char *xml
)
3576 #if defined(HAVE_LIBEXPAT)
3577 if (remote_support_xml
== NULL
)
3578 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
3581 char *copy
= xstrdup (remote_support_xml
+ 13);
3582 char *p
= strtok (copy
, ",");
3586 if (strcmp (p
, xml
) == 0)
3593 while ((p
= strtok (NULL
, ",")) != NULL
);
3596 remote_support_xml
= reconcat (remote_support_xml
,
3597 remote_support_xml
, ",", xml
,
3604 remote_query_supported_append (char *msg
, const char *append
)
3607 return reconcat (msg
, msg
, ";", append
, (char *) NULL
);
3609 return xstrdup (append
);
3613 remote_query_supported (void)
3615 struct remote_state
*rs
= get_remote_state ();
3618 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
3620 /* The packet support flags are handled differently for this packet
3621 than for most others. We treat an error, a disabled packet, and
3622 an empty response identically: any features which must be reported
3623 to be used will be automatically disabled. An empty buffer
3624 accomplishes this, since that is also the representation for a list
3625 containing no features. */
3628 if (remote_protocol_packets
[PACKET_qSupported
].support
!= PACKET_DISABLE
)
3631 struct cleanup
*old_chain
= make_cleanup (free_current_contents
, &q
);
3634 q
= remote_query_supported_append (q
, "multiprocess+");
3636 if (remote_support_xml
)
3637 q
= remote_query_supported_append (q
, remote_support_xml
);
3639 q
= remote_query_supported_append (q
, "qRelocInsn+");
3641 q
= reconcat (q
, "qSupported:", q
, (char *) NULL
);
3644 do_cleanups (old_chain
);
3646 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3648 /* If an error occured, warn, but do not return - just reset the
3649 buffer to empty and go on to disable features. */
3650 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
3653 warning (_("Remote failure reply: %s"), rs
->buf
);
3658 memset (seen
, 0, sizeof (seen
));
3663 enum packet_support is_supported
;
3664 char *p
, *end
, *name_end
, *value
;
3666 /* First separate out this item from the rest of the packet. If
3667 there's another item after this, we overwrite the separator
3668 (terminated strings are much easier to work with). */
3670 end
= strchr (p
, ';');
3673 end
= p
+ strlen (p
);
3683 warning (_("empty item in \"qSupported\" response"));
3688 name_end
= strchr (p
, '=');
3691 /* This is a name=value entry. */
3692 is_supported
= PACKET_ENABLE
;
3693 value
= name_end
+ 1;
3702 is_supported
= PACKET_ENABLE
;
3706 is_supported
= PACKET_DISABLE
;
3710 is_supported
= PACKET_SUPPORT_UNKNOWN
;
3714 warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p
);
3720 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3721 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
3723 const struct protocol_feature
*feature
;
3726 feature
= &remote_protocol_features
[i
];
3727 feature
->func (feature
, is_supported
, value
);
3732 /* If we increased the packet size, make sure to increase the global
3733 buffer size also. We delay this until after parsing the entire
3734 qSupported packet, because this is the same buffer we were
3736 if (rs
->buf_size
< rs
->explicit_packet_size
)
3738 rs
->buf_size
= rs
->explicit_packet_size
;
3739 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
3742 /* Handle the defaults for unmentioned features. */
3743 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3746 const struct protocol_feature
*feature
;
3748 feature
= &remote_protocol_features
[i
];
3749 feature
->func (feature
, feature
->default_support
, NULL
);
3755 remote_open_1 (char *name
, int from_tty
, struct target_ops
*target
, int extended_p
)
3757 struct remote_state
*rs
= get_remote_state ();
3760 error (_("To open a remote debug connection, you need to specify what\n"
3761 "serial device is attached to the remote system\n"
3762 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
3764 /* See FIXME above. */
3765 if (!target_async_permitted
)
3766 wait_forever_enabled_p
= 1;
3768 /* If we're connected to a running target, target_preopen will kill it.
3769 But if we're connected to a target system with no running process,
3770 then we will still be connected when it returns. Ask this question
3771 first, before target_preopen has a chance to kill anything. */
3772 if (remote_desc
!= NULL
&& !have_inferiors ())
3775 || query (_("Already connected to a remote target. Disconnect? ")))
3778 error (_("Still connected."));
3781 target_preopen (from_tty
);
3783 unpush_target (target
);
3785 /* This time without a query. If we were connected to an
3786 extended-remote target and target_preopen killed the running
3787 process, we may still be connected. If we are starting "target
3788 remote" now, the extended-remote target will not have been
3789 removed by unpush_target. */
3790 if (remote_desc
!= NULL
&& !have_inferiors ())
3793 /* Make sure we send the passed signals list the next time we resume. */
3794 xfree (last_pass_packet
);
3795 last_pass_packet
= NULL
;
3797 remote_fileio_reset ();
3798 reopen_exec_file ();
3801 remote_desc
= remote_serial_open (name
);
3803 perror_with_name (name
);
3805 if (baud_rate
!= -1)
3807 if (serial_setbaudrate (remote_desc
, baud_rate
))
3809 /* The requested speed could not be set. Error out to
3810 top level after closing remote_desc. Take care to
3811 set remote_desc to NULL to avoid closing remote_desc
3813 serial_close (remote_desc
);
3815 perror_with_name (name
);
3819 serial_raw (remote_desc
);
3821 /* If there is something sitting in the buffer we might take it as a
3822 response to a command, which would be bad. */
3823 serial_flush_input (remote_desc
);
3827 puts_filtered ("Remote debugging using ");
3828 puts_filtered (name
);
3829 puts_filtered ("\n");
3831 push_target (target
); /* Switch to using remote target now. */
3833 /* Register extra event sources in the event loop. */
3834 remote_async_inferior_event_token
3835 = create_async_event_handler (remote_async_inferior_event_handler
,
3837 remote_async_get_pending_events_token
3838 = create_async_event_handler (remote_async_get_pending_events_handler
,
3841 /* Reset the target state; these things will be queried either by
3842 remote_query_supported or as they are needed. */
3843 init_all_packet_configs ();
3844 rs
->cached_wait_status
= 0;
3845 rs
->explicit_packet_size
= 0;
3847 rs
->multi_process_aware
= 0;
3848 rs
->extended
= extended_p
;
3849 rs
->non_stop_aware
= 0;
3850 rs
->waiting_for_stop_reply
= 0;
3851 rs
->ctrlc_pending_p
= 0;
3853 general_thread
= not_sent_ptid
;
3854 continue_thread
= not_sent_ptid
;
3856 /* Probe for ability to use "ThreadInfo" query, as required. */
3857 use_threadinfo_query
= 1;
3858 use_threadextra_query
= 1;
3860 if (target_async_permitted
)
3862 /* With this target we start out by owning the terminal. */
3863 remote_async_terminal_ours_p
= 1;
3865 /* FIXME: cagney/1999-09-23: During the initial connection it is
3866 assumed that the target is already ready and able to respond to
3867 requests. Unfortunately remote_start_remote() eventually calls
3868 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
3869 around this. Eventually a mechanism that allows
3870 wait_for_inferior() to expect/get timeouts will be
3872 wait_forever_enabled_p
= 0;
3875 /* First delete any symbols previously loaded from shared libraries. */
3876 no_shared_libraries (NULL
, 0);
3879 init_thread_list ();
3881 /* Start the remote connection. If error() or QUIT, discard this
3882 target (we'd otherwise be in an inconsistent state) and then
3883 propogate the error on up the exception chain. This ensures that
3884 the caller doesn't stumble along blindly assuming that the
3885 function succeeded. The CLI doesn't have this problem but other
3886 UI's, such as MI do.
3888 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
3889 this function should return an error indication letting the
3890 caller restore the previous state. Unfortunately the command
3891 ``target remote'' is directly wired to this function making that
3892 impossible. On a positive note, the CLI side of this problem has
3893 been fixed - the function set_cmd_context() makes it possible for
3894 all the ``target ....'' commands to share a common callback
3895 function. See cli-dump.c. */
3897 struct gdb_exception ex
;
3898 struct start_remote_args args
;
3900 args
.from_tty
= from_tty
;
3901 args
.target
= target
;
3902 args
.extended_p
= extended_p
;
3904 ex
= catch_exception (uiout
, remote_start_remote
, &args
, RETURN_MASK_ALL
);
3907 /* Pop the partially set up target - unless something else did
3908 already before throwing the exception. */
3909 if (remote_desc
!= NULL
)
3911 if (target_async_permitted
)
3912 wait_forever_enabled_p
= 1;
3913 throw_exception (ex
);
3917 if (target_async_permitted
)
3918 wait_forever_enabled_p
= 1;
3921 /* This takes a program previously attached to and detaches it. After
3922 this is done, GDB can be used to debug some other program. We
3923 better not have left any breakpoints in the target program or it'll
3924 die when it hits one. */
3927 remote_detach_1 (char *args
, int from_tty
, int extended
)
3929 int pid
= ptid_get_pid (inferior_ptid
);
3930 struct remote_state
*rs
= get_remote_state ();
3933 error (_("Argument given to \"detach\" when remotely debugging."));
3935 if (!target_has_execution
)
3936 error (_("No process to detach from."));
3938 /* Tell the remote target to detach. */
3939 if (remote_multi_process_p (rs
))
3940 sprintf (rs
->buf
, "D;%x", pid
);
3942 strcpy (rs
->buf
, "D");
3945 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3947 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
3949 else if (rs
->buf
[0] == '\0')
3950 error (_("Remote doesn't know how to detach"));
3952 error (_("Can't detach process."));
3956 if (remote_multi_process_p (rs
))
3957 printf_filtered (_("Detached from remote %s.\n"),
3958 target_pid_to_str (pid_to_ptid (pid
)));
3962 puts_filtered (_("Detached from remote process.\n"));
3964 puts_filtered (_("Ending remote debugging.\n"));
3968 discard_pending_stop_replies (pid
);
3969 target_mourn_inferior ();
3973 remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
3975 remote_detach_1 (args
, from_tty
, 0);
3979 extended_remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
3981 remote_detach_1 (args
, from_tty
, 1);
3984 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
3987 remote_disconnect (struct target_ops
*target
, char *args
, int from_tty
)
3990 error (_("Argument given to \"disconnect\" when remotely debugging."));
3992 /* Make sure we unpush even the extended remote targets; mourn
3993 won't do it. So call remote_mourn_1 directly instead of
3994 target_mourn_inferior. */
3995 remote_mourn_1 (target
);
3998 puts_filtered ("Ending remote debugging.\n");
4001 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
4002 be chatty about it. */
4005 extended_remote_attach_1 (struct target_ops
*target
, char *args
, int from_tty
)
4007 struct remote_state
*rs
= get_remote_state ();
4009 char *wait_status
= NULL
;
4011 pid
= parse_pid_to_attach (args
);
4013 /* Remote PID can be freely equal to getpid, do not check it here the same
4014 way as in other targets. */
4016 if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
4017 error (_("This target does not support attaching to a process"));
4019 sprintf (rs
->buf
, "vAttach;%x", pid
);
4021 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4023 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vAttach
]) == PACKET_OK
)
4026 printf_unfiltered (_("Attached to %s\n"),
4027 target_pid_to_str (pid_to_ptid (pid
)));
4031 /* Save the reply for later. */
4032 wait_status
= alloca (strlen (rs
->buf
) + 1);
4033 strcpy (wait_status
, rs
->buf
);
4035 else if (strcmp (rs
->buf
, "OK") != 0)
4036 error (_("Attaching to %s failed with: %s"),
4037 target_pid_to_str (pid_to_ptid (pid
)),
4040 else if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
4041 error (_("This target does not support attaching to a process"));
4043 error (_("Attaching to %s failed"),
4044 target_pid_to_str (pid_to_ptid (pid
)));
4046 set_current_inferior (remote_add_inferior (pid
, 1));
4048 inferior_ptid
= pid_to_ptid (pid
);
4052 struct thread_info
*thread
;
4054 /* Get list of threads. */
4055 remote_threads_info (target
);
4057 thread
= first_thread_of_process (pid
);
4059 inferior_ptid
= thread
->ptid
;
4061 inferior_ptid
= pid_to_ptid (pid
);
4063 /* Invalidate our notion of the remote current thread. */
4064 record_currthread (minus_one_ptid
);
4068 /* Now, if we have thread information, update inferior_ptid. */
4069 inferior_ptid
= remote_current_thread (inferior_ptid
);
4071 /* Add the main thread to the thread list. */
4072 add_thread_silent (inferior_ptid
);
4075 /* Next, if the target can specify a description, read it. We do
4076 this before anything involving memory or registers. */
4077 target_find_description ();
4081 /* Use the previously fetched status. */
4082 gdb_assert (wait_status
!= NULL
);
4084 if (target_can_async_p ())
4086 struct stop_reply
*stop_reply
;
4087 struct cleanup
*old_chain
;
4089 stop_reply
= stop_reply_xmalloc ();
4090 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
4091 remote_parse_stop_reply (wait_status
, stop_reply
);
4092 discard_cleanups (old_chain
);
4093 push_stop_reply (stop_reply
);
4095 target_async (inferior_event_handler
, 0);
4099 gdb_assert (wait_status
!= NULL
);
4100 strcpy (rs
->buf
, wait_status
);
4101 rs
->cached_wait_status
= 1;
4105 gdb_assert (wait_status
== NULL
);
4109 extended_remote_attach (struct target_ops
*ops
, char *args
, int from_tty
)
4111 extended_remote_attach_1 (ops
, args
, from_tty
);
4114 /* Convert hex digit A to a number. */
4119 if (a
>= '0' && a
<= '9')
4121 else if (a
>= 'a' && a
<= 'f')
4122 return a
- 'a' + 10;
4123 else if (a
>= 'A' && a
<= 'F')
4124 return a
- 'A' + 10;
4126 error (_("Reply contains invalid hex digit %d"), a
);
4130 hex2bin (const char *hex
, gdb_byte
*bin
, int count
)
4134 for (i
= 0; i
< count
; i
++)
4136 if (hex
[0] == 0 || hex
[1] == 0)
4138 /* Hex string is short, or of uneven length.
4139 Return the count that has been converted so far. */
4142 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
4148 /* Convert number NIB to a hex digit. */
4156 return 'a' + nib
- 10;
4160 bin2hex (const gdb_byte
*bin
, char *hex
, int count
)
4164 /* May use a length, or a nul-terminated string as input. */
4166 count
= strlen ((char *) bin
);
4168 for (i
= 0; i
< count
; i
++)
4170 *hex
++ = tohex ((*bin
>> 4) & 0xf);
4171 *hex
++ = tohex (*bin
++ & 0xf);
4177 /* Check for the availability of vCont. This function should also check
4181 remote_vcont_probe (struct remote_state
*rs
)
4185 strcpy (rs
->buf
, "vCont?");
4187 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4190 /* Make sure that the features we assume are supported. */
4191 if (strncmp (buf
, "vCont", 5) == 0)
4194 int support_s
, support_S
, support_c
, support_C
;
4200 rs
->support_vCont_t
= 0;
4201 while (p
&& *p
== ';')
4204 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4206 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4208 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4210 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4212 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4213 rs
->support_vCont_t
= 1;
4215 p
= strchr (p
, ';');
4218 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
4219 BUF will make packet_ok disable the packet. */
4220 if (!support_s
|| !support_S
|| !support_c
|| !support_C
)
4224 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
4227 /* Helper function for building "vCont" resumptions. Write a
4228 resumption to P. ENDP points to one-passed-the-end of the buffer
4229 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
4230 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
4231 resumed thread should be single-stepped and/or signalled. If PTID
4232 equals minus_one_ptid, then all threads are resumed; if PTID
4233 represents a process, then all threads of the process are resumed;
4234 the thread to be stepped and/or signalled is given in the global
4238 append_resumption (char *p
, char *endp
,
4239 ptid_t ptid
, int step
, enum target_signal siggnal
)
4241 struct remote_state
*rs
= get_remote_state ();
4243 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
4244 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
4246 p
+= xsnprintf (p
, endp
- p
, ";s");
4247 else if (siggnal
!= TARGET_SIGNAL_0
)
4248 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
4250 p
+= xsnprintf (p
, endp
- p
, ";c");
4252 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
4256 /* All (-1) threads of process. */
4257 nptid
= ptid_build (ptid_get_pid (ptid
), 0, -1);
4259 p
+= xsnprintf (p
, endp
- p
, ":");
4260 p
= write_ptid (p
, endp
, nptid
);
4262 else if (!ptid_equal (ptid
, minus_one_ptid
))
4264 p
+= xsnprintf (p
, endp
- p
, ":");
4265 p
= write_ptid (p
, endp
, ptid
);
4271 /* Resume the remote inferior by using a "vCont" packet. The thread
4272 to be resumed is PTID; STEP and SIGGNAL indicate whether the
4273 resumed thread should be single-stepped and/or signalled. If PTID
4274 equals minus_one_ptid, then all threads are resumed; the thread to
4275 be stepped and/or signalled is given in the global INFERIOR_PTID.
4276 This function returns non-zero iff it resumes the inferior.
4278 This function issues a strict subset of all possible vCont commands at the
4282 remote_vcont_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
4284 struct remote_state
*rs
= get_remote_state ();
4288 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
4289 remote_vcont_probe (rs
);
4291 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_DISABLE
)
4295 endp
= rs
->buf
+ get_remote_packet_size ();
4297 /* If we could generate a wider range of packets, we'd have to worry
4298 about overflowing BUF. Should there be a generic
4299 "multi-part-packet" packet? */
4301 p
+= xsnprintf (p
, endp
- p
, "vCont");
4303 if (ptid_equal (ptid
, magic_null_ptid
))
4305 /* MAGIC_NULL_PTID means that we don't have any active threads,
4306 so we don't have any TID numbers the inferior will
4307 understand. Make sure to only send forms that do not specify
4309 p
= append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
4311 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
4313 /* Resume all threads (of all processes, or of a single
4314 process), with preference for INFERIOR_PTID. This assumes
4315 inferior_ptid belongs to the set of all threads we are about
4317 if (step
|| siggnal
!= TARGET_SIGNAL_0
)
4319 /* Step inferior_ptid, with or without signal. */
4320 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
4323 /* And continue others without a signal. */
4324 p
= append_resumption (p
, endp
, ptid
, /*step=*/ 0, TARGET_SIGNAL_0
);
4328 /* Scheduler locking; resume only PTID. */
4329 p
= append_resumption (p
, endp
, ptid
, step
, siggnal
);
4332 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
4337 /* In non-stop, the stub replies to vCont with "OK". The stop
4338 reply will be reported asynchronously by means of a `%Stop'
4340 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4341 if (strcmp (rs
->buf
, "OK") != 0)
4342 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
4348 /* Tell the remote machine to resume. */
4350 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
4352 static int last_sent_step
;
4355 remote_resume (struct target_ops
*ops
,
4356 ptid_t ptid
, int step
, enum target_signal siggnal
)
4358 struct remote_state
*rs
= get_remote_state ();
4361 last_sent_signal
= siggnal
;
4362 last_sent_step
= step
;
4364 /* Update the inferior on signals to silently pass, if they've changed. */
4365 remote_pass_signals ();
4367 /* The vCont packet doesn't need to specify threads via Hc. */
4368 /* No reverse support (yet) for vCont. */
4369 if (execution_direction
!= EXEC_REVERSE
)
4370 if (remote_vcont_resume (ptid
, step
, siggnal
))
4373 /* All other supported resume packets do use Hc, so set the continue
4375 if (ptid_equal (ptid
, minus_one_ptid
))
4376 set_continue_thread (any_thread_ptid
);
4378 set_continue_thread (ptid
);
4381 if (execution_direction
== EXEC_REVERSE
)
4383 /* We don't pass signals to the target in reverse exec mode. */
4384 if (info_verbose
&& siggnal
!= TARGET_SIGNAL_0
)
4385 warning (" - Can't pass signal %d to target in reverse: ignored.\n",
4389 && remote_protocol_packets
[PACKET_bs
].support
== PACKET_DISABLE
)
4390 error (_("Remote reverse-step not supported."));
4392 && remote_protocol_packets
[PACKET_bc
].support
== PACKET_DISABLE
)
4393 error (_("Remote reverse-continue not supported."));
4395 strcpy (buf
, step
? "bs" : "bc");
4397 else if (siggnal
!= TARGET_SIGNAL_0
)
4399 buf
[0] = step
? 'S' : 'C';
4400 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
4401 buf
[2] = tohex (((int) siggnal
) & 0xf);
4405 strcpy (buf
, step
? "s" : "c");
4410 /* We are about to start executing the inferior, let's register it
4411 with the event loop. NOTE: this is the one place where all the
4412 execution commands end up. We could alternatively do this in each
4413 of the execution commands in infcmd.c. */
4414 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
4415 into infcmd.c in order to allow inferior function calls to work
4416 NOT asynchronously. */
4417 if (target_can_async_p ())
4418 target_async (inferior_event_handler
, 0);
4420 /* We've just told the target to resume. The remote server will
4421 wait for the inferior to stop, and then send a stop reply. In
4422 the mean time, we can't start another command/query ourselves
4423 because the stub wouldn't be ready to process it. This applies
4424 only to the base all-stop protocol, however. In non-stop (which
4425 only supports vCont), the stub replies with an "OK", and is
4426 immediate able to process further serial input. */
4428 rs
->waiting_for_stop_reply
= 1;
4432 /* Set up the signal handler for SIGINT, while the target is
4433 executing, ovewriting the 'regular' SIGINT signal handler. */
4435 initialize_sigint_signal_handler (void)
4437 signal (SIGINT
, handle_remote_sigint
);
4440 /* Signal handler for SIGINT, while the target is executing. */
4442 handle_remote_sigint (int sig
)
4444 signal (sig
, handle_remote_sigint_twice
);
4445 mark_async_signal_handler_wrapper (sigint_remote_token
);
4448 /* Signal handler for SIGINT, installed after SIGINT has already been
4449 sent once. It will take effect the second time that the user sends
4452 handle_remote_sigint_twice (int sig
)
4454 signal (sig
, handle_remote_sigint
);
4455 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
4458 /* Perform the real interruption of the target execution, in response
4461 async_remote_interrupt (gdb_client_data arg
)
4464 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
4466 target_stop (inferior_ptid
);
4469 /* Perform interrupt, if the first attempt did not succeed. Just give
4470 up on the target alltogether. */
4472 async_remote_interrupt_twice (gdb_client_data arg
)
4475 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
4480 /* Reinstall the usual SIGINT handlers, after the target has
4483 cleanup_sigint_signal_handler (void *dummy
)
4485 signal (SIGINT
, handle_sigint
);
4488 /* Send ^C to target to halt it. Target will respond, and send us a
4490 static void (*ofunc
) (int);
4492 /* The command line interface's stop routine. This function is installed
4493 as a signal handler for SIGINT. The first time a user requests a
4494 stop, we call remote_stop to send a break or ^C. If there is no
4495 response from the target (it didn't stop when the user requested it),
4496 we ask the user if he'd like to detach from the target. */
4498 remote_interrupt (int signo
)
4500 /* If this doesn't work, try more severe steps. */
4501 signal (signo
, remote_interrupt_twice
);
4503 gdb_call_async_signal_handler (sigint_remote_token
, 1);
4506 /* The user typed ^C twice. */
4509 remote_interrupt_twice (int signo
)
4511 signal (signo
, ofunc
);
4512 gdb_call_async_signal_handler (sigint_remote_twice_token
, 1);
4513 signal (signo
, remote_interrupt
);
4516 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
4517 thread, all threads of a remote process, or all threads of all
4521 remote_stop_ns (ptid_t ptid
)
4523 struct remote_state
*rs
= get_remote_state ();
4525 char *endp
= rs
->buf
+ get_remote_packet_size ();
4527 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
4528 remote_vcont_probe (rs
);
4530 if (!rs
->support_vCont_t
)
4531 error (_("Remote server does not support stopping threads"));
4533 if (ptid_equal (ptid
, minus_one_ptid
)
4534 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
4535 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
4540 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
4542 if (ptid_is_pid (ptid
))
4543 /* All (-1) threads of process. */
4544 nptid
= ptid_build (ptid_get_pid (ptid
), 0, -1);
4547 /* Small optimization: if we already have a stop reply for
4548 this thread, no use in telling the stub we want this
4550 if (peek_stop_reply (ptid
))
4556 p
= write_ptid (p
, endp
, nptid
);
4559 /* In non-stop, we get an immediate OK reply. The stop reply will
4560 come in asynchronously by notification. */
4562 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4563 if (strcmp (rs
->buf
, "OK") != 0)
4564 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
4567 /* All-stop version of target_stop. Sends a break or a ^C to stop the
4568 remote target. It is undefined which thread of which process
4569 reports the stop. */
4572 remote_stop_as (ptid_t ptid
)
4574 struct remote_state
*rs
= get_remote_state ();
4576 rs
->ctrlc_pending_p
= 1;
4578 /* If the inferior is stopped already, but the core didn't know
4579 about it yet, just ignore the request. The cached wait status
4580 will be collected in remote_wait. */
4581 if (rs
->cached_wait_status
)
4584 /* Send interrupt_sequence to remote target. */
4585 send_interrupt_sequence ();
4588 /* This is the generic stop called via the target vector. When a target
4589 interrupt is requested, either by the command line or the GUI, we
4590 will eventually end up here. */
4593 remote_stop (ptid_t ptid
)
4596 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
4599 remote_stop_ns (ptid
);
4601 remote_stop_as (ptid
);
4604 /* Ask the user what to do when an interrupt is received. */
4607 interrupt_query (void)
4609 target_terminal_ours ();
4611 if (target_can_async_p ())
4613 signal (SIGINT
, handle_sigint
);
4614 deprecated_throw_reason (RETURN_QUIT
);
4618 if (query (_("Interrupted while waiting for the program.\n\
4619 Give up (and stop debugging it)? ")))
4622 deprecated_throw_reason (RETURN_QUIT
);
4626 target_terminal_inferior ();
4629 /* Enable/disable target terminal ownership. Most targets can use
4630 terminal groups to control terminal ownership. Remote targets are
4631 different in that explicit transfer of ownership to/from GDB/target
4635 remote_terminal_inferior (void)
4637 if (!target_async_permitted
)
4638 /* Nothing to do. */
4641 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
4642 idempotent. The event-loop GDB talking to an asynchronous target
4643 with a synchronous command calls this function from both
4644 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
4645 transfer the terminal to the target when it shouldn't this guard
4647 if (!remote_async_terminal_ours_p
)
4649 delete_file_handler (input_fd
);
4650 remote_async_terminal_ours_p
= 0;
4651 initialize_sigint_signal_handler ();
4652 /* NOTE: At this point we could also register our selves as the
4653 recipient of all input. Any characters typed could then be
4654 passed on down to the target. */
4658 remote_terminal_ours (void)
4660 if (!target_async_permitted
)
4661 /* Nothing to do. */
4664 /* See FIXME in remote_terminal_inferior. */
4665 if (remote_async_terminal_ours_p
)
4667 cleanup_sigint_signal_handler (NULL
);
4668 add_file_handler (input_fd
, stdin_event_handler
, 0);
4669 remote_async_terminal_ours_p
= 1;
4673 remote_console_output (char *msg
)
4677 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
4680 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
4684 fputs_unfiltered (tb
, gdb_stdtarg
);
4686 gdb_flush (gdb_stdtarg
);
4689 typedef struct cached_reg
4692 gdb_byte data
[MAX_REGISTER_SIZE
];
4695 DEF_VEC_O(cached_reg_t
);
4699 struct stop_reply
*next
;
4703 struct target_waitstatus ws
;
4705 VEC(cached_reg_t
) *regcache
;
4707 int stopped_by_watchpoint_p
;
4708 CORE_ADDR watch_data_address
;
4716 /* The list of already fetched and acknowledged stop events. */
4717 static struct stop_reply
*stop_reply_queue
;
4719 static struct stop_reply
*
4720 stop_reply_xmalloc (void)
4722 struct stop_reply
*r
= XMALLOC (struct stop_reply
);
4729 stop_reply_xfree (struct stop_reply
*r
)
4733 VEC_free (cached_reg_t
, r
->regcache
);
4738 /* Discard all pending stop replies of inferior PID. If PID is -1,
4739 discard everything. */
4742 discard_pending_stop_replies (int pid
)
4744 struct stop_reply
*prev
= NULL
, *reply
, *next
;
4746 /* Discard the in-flight notification. */
4747 if (pending_stop_reply
!= NULL
4749 || ptid_get_pid (pending_stop_reply
->ptid
) == pid
))
4751 stop_reply_xfree (pending_stop_reply
);
4752 pending_stop_reply
= NULL
;
4755 /* Discard the stop replies we have already pulled with
4757 for (reply
= stop_reply_queue
; reply
; reply
= next
)
4761 || ptid_get_pid (reply
->ptid
) == pid
)
4763 if (reply
== stop_reply_queue
)
4764 stop_reply_queue
= reply
->next
;
4766 prev
->next
= reply
->next
;
4768 stop_reply_xfree (reply
);
4775 /* Cleanup wrapper. */
4778 do_stop_reply_xfree (void *arg
)
4780 struct stop_reply
*r
= arg
;
4782 stop_reply_xfree (r
);
4785 /* Look for a queued stop reply belonging to PTID. If one is found,
4786 remove it from the queue, and return it. Returns NULL if none is
4787 found. If there are still queued events left to process, tell the
4788 event loop to get back to target_wait soon. */
4790 static struct stop_reply
*
4791 queued_stop_reply (ptid_t ptid
)
4793 struct stop_reply
*it
;
4794 struct stop_reply
**it_link
;
4796 it
= stop_reply_queue
;
4797 it_link
= &stop_reply_queue
;
4800 if (ptid_match (it
->ptid
, ptid
))
4802 *it_link
= it
->next
;
4807 it_link
= &it
->next
;
4811 if (stop_reply_queue
)
4812 /* There's still at least an event left. */
4813 mark_async_event_handler (remote_async_inferior_event_token
);
4818 /* Push a fully parsed stop reply in the stop reply queue. Since we
4819 know that we now have at least one queued event left to pass to the
4820 core side, tell the event loop to get back to target_wait soon. */
4823 push_stop_reply (struct stop_reply
*new_event
)
4825 struct stop_reply
*event
;
4827 if (stop_reply_queue
)
4829 for (event
= stop_reply_queue
;
4830 event
&& event
->next
;
4831 event
= event
->next
)
4834 event
->next
= new_event
;
4837 stop_reply_queue
= new_event
;
4839 mark_async_event_handler (remote_async_inferior_event_token
);
4842 /* Returns true if we have a stop reply for PTID. */
4845 peek_stop_reply (ptid_t ptid
)
4847 struct stop_reply
*it
;
4849 for (it
= stop_reply_queue
; it
; it
= it
->next
)
4850 if (ptid_equal (ptid
, it
->ptid
))
4852 if (it
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
4859 /* Parse the stop reply in BUF. Either the function succeeds, and the
4860 result is stored in EVENT, or throws an error. */
4863 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
4865 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4869 event
->ptid
= null_ptid
;
4870 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
4871 event
->ws
.value
.integer
= 0;
4872 event
->solibs_changed
= 0;
4873 event
->replay_event
= 0;
4874 event
->stopped_by_watchpoint_p
= 0;
4875 event
->regcache
= NULL
;
4880 case 'T': /* Status with PC, SP, FP, ... */
4881 /* Expedited reply, containing Signal, {regno, reg} repeat. */
4882 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
4884 n... = register number
4885 r... = register contents
4888 p
= &buf
[3]; /* after Txx */
4896 /* If the packet contains a register number, save it in
4897 pnum and set p1 to point to the character following it.
4898 Otherwise p1 points to p. */
4900 /* If this packet is an awatch packet, don't parse the 'a'
4901 as a register number. */
4903 if (strncmp (p
, "awatch", strlen("awatch")) != 0
4904 && strncmp (p
, "core", strlen ("core") != 0))
4906 /* Read the ``P'' register number. */
4907 pnum
= strtol (p
, &p_temp
, 16);
4913 if (p1
== p
) /* No register number present here. */
4915 p1
= strchr (p
, ':');
4917 error (_("Malformed packet(a) (missing colon): %s\n\
4920 if (strncmp (p
, "thread", p1
- p
) == 0)
4921 event
->ptid
= read_ptid (++p1
, &p
);
4922 else if ((strncmp (p
, "watch", p1
- p
) == 0)
4923 || (strncmp (p
, "rwatch", p1
- p
) == 0)
4924 || (strncmp (p
, "awatch", p1
- p
) == 0))
4926 event
->stopped_by_watchpoint_p
= 1;
4927 p
= unpack_varlen_hex (++p1
, &addr
);
4928 event
->watch_data_address
= (CORE_ADDR
) addr
;
4930 else if (strncmp (p
, "library", p1
- p
) == 0)
4934 while (*p_temp
&& *p_temp
!= ';')
4937 event
->solibs_changed
= 1;
4940 else if (strncmp (p
, "replaylog", p1
- p
) == 0)
4942 /* NO_HISTORY event.
4943 p1 will indicate "begin" or "end", but
4944 it makes no difference for now, so ignore it. */
4945 event
->replay_event
= 1;
4946 p_temp
= strchr (p1
+ 1, ';');
4950 else if (strncmp (p
, "core", p1
- p
) == 0)
4954 p
= unpack_varlen_hex (++p1
, &c
);
4959 /* Silently skip unknown optional info. */
4960 p_temp
= strchr (p1
+ 1, ';');
4967 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
4968 cached_reg_t cached_reg
;
4973 error (_("Malformed packet(b) (missing colon): %s\n\
4979 error (_("Remote sent bad register number %s: %s\n\
4981 hex_string (pnum
), p
, buf
);
4983 cached_reg
.num
= reg
->regnum
;
4985 fieldsize
= hex2bin (p
, cached_reg
.data
,
4986 register_size (target_gdbarch
,
4989 if (fieldsize
< register_size (target_gdbarch
,
4991 warning (_("Remote reply is too short: %s"), buf
);
4993 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
4997 error (_("Remote register badly formatted: %s\nhere: %s"),
5002 case 'S': /* Old style status, just signal only. */
5003 if (event
->solibs_changed
)
5004 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
5005 else if (event
->replay_event
)
5006 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
5009 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
5010 event
->ws
.value
.sig
= (enum target_signal
)
5011 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
5014 case 'W': /* Target exited. */
5021 /* GDB used to accept only 2 hex chars here. Stubs should
5022 only send more if they detect GDB supports multi-process
5024 p
= unpack_varlen_hex (&buf
[1], &value
);
5028 /* The remote process exited. */
5029 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
5030 event
->ws
.value
.integer
= value
;
5034 /* The remote process exited with a signal. */
5035 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
5036 event
->ws
.value
.sig
= (enum target_signal
) value
;
5039 /* If no process is specified, assume inferior_ptid. */
5040 pid
= ptid_get_pid (inferior_ptid
);
5049 else if (strncmp (p
,
5050 "process:", sizeof ("process:") - 1) == 0)
5054 p
+= sizeof ("process:") - 1;
5055 unpack_varlen_hex (p
, &upid
);
5059 error (_("unknown stop reply packet: %s"), buf
);
5062 error (_("unknown stop reply packet: %s"), buf
);
5063 event
->ptid
= pid_to_ptid (pid
);
5068 if (non_stop
&& ptid_equal (event
->ptid
, null_ptid
))
5069 error (_("No process or thread specified in stop reply: %s"), buf
);
5072 /* When the stub wants to tell GDB about a new stop reply, it sends a
5073 stop notification (%Stop). Those can come it at any time, hence,
5074 we have to make sure that any pending putpkt/getpkt sequence we're
5075 making is finished, before querying the stub for more events with
5076 vStopped. E.g., if we started a vStopped sequence immediatelly
5077 upon receiving the %Stop notification, something like this could
5085 1.6) <-- (registers reply to step #1.3)
5087 Obviously, the reply in step #1.6 would be unexpected to a vStopped
5090 To solve this, whenever we parse a %Stop notification sucessfully,
5091 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
5092 doing whatever we were doing:
5098 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
5099 2.5) <-- (registers reply to step #2.3)
5101 Eventualy after step #2.5, we return to the event loop, which
5102 notices there's an event on the
5103 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
5104 associated callback --- the function below. At this point, we're
5105 always safe to start a vStopped sequence. :
5108 2.7) <-- T05 thread:2
5114 remote_get_pending_stop_replies (void)
5116 struct remote_state
*rs
= get_remote_state ();
5118 if (pending_stop_reply
)
5121 putpkt ("vStopped");
5123 /* Now we can rely on it. */
5124 push_stop_reply (pending_stop_reply
);
5125 pending_stop_reply
= NULL
;
5129 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5130 if (strcmp (rs
->buf
, "OK") == 0)
5134 struct cleanup
*old_chain
;
5135 struct stop_reply
*stop_reply
= stop_reply_xmalloc ();
5137 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
5138 remote_parse_stop_reply (rs
->buf
, stop_reply
);
5141 putpkt ("vStopped");
5143 if (stop_reply
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
5145 /* Now we can rely on it. */
5146 discard_cleanups (old_chain
);
5147 push_stop_reply (stop_reply
);
5150 /* We got an unknown stop reply. */
5151 do_cleanups (old_chain
);
5158 /* Called when it is decided that STOP_REPLY holds the info of the
5159 event that is to be returned to the core. This function always
5160 destroys STOP_REPLY. */
5163 process_stop_reply (struct stop_reply
*stop_reply
,
5164 struct target_waitstatus
*status
)
5168 *status
= stop_reply
->ws
;
5169 ptid
= stop_reply
->ptid
;
5171 /* If no thread/process was reported by the stub, assume the current
5173 if (ptid_equal (ptid
, null_ptid
))
5174 ptid
= inferior_ptid
;
5176 if (status
->kind
!= TARGET_WAITKIND_EXITED
5177 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
5179 /* Expedited registers. */
5180 if (stop_reply
->regcache
)
5182 struct regcache
*regcache
5183 = get_thread_arch_regcache (ptid
, target_gdbarch
);
5188 VEC_iterate(cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
5190 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
5191 VEC_free (cached_reg_t
, stop_reply
->regcache
);
5194 remote_stopped_by_watchpoint_p
= stop_reply
->stopped_by_watchpoint_p
;
5195 remote_watch_data_address
= stop_reply
->watch_data_address
;
5197 remote_notice_new_inferior (ptid
, 0);
5198 demand_private_info (ptid
)->core
= stop_reply
->core
;
5201 stop_reply_xfree (stop_reply
);
5205 /* The non-stop mode version of target_wait. */
5208 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
5210 struct remote_state
*rs
= get_remote_state ();
5211 struct stop_reply
*stop_reply
;
5214 /* If in non-stop mode, get out of getpkt even if a
5215 notification is received. */
5217 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
5224 case 'E': /* Error of some sort. */
5225 /* We're out of sync with the target now. Did it continue
5226 or not? We can't tell which thread it was in non-stop,
5227 so just ignore this. */
5228 warning (_("Remote failure reply: %s"), rs
->buf
);
5230 case 'O': /* Console output. */
5231 remote_console_output (rs
->buf
+ 1);
5234 warning (_("Invalid remote reply: %s"), rs
->buf
);
5238 /* Acknowledge a pending stop reply that may have arrived in the
5240 if (pending_stop_reply
!= NULL
)
5241 remote_get_pending_stop_replies ();
5243 /* If indeed we noticed a stop reply, we're done. */
5244 stop_reply
= queued_stop_reply (ptid
);
5245 if (stop_reply
!= NULL
)
5246 return process_stop_reply (stop_reply
, status
);
5248 /* Still no event. If we're just polling for an event, then
5249 return to the event loop. */
5250 if (options
& TARGET_WNOHANG
)
5252 status
->kind
= TARGET_WAITKIND_IGNORE
;
5253 return minus_one_ptid
;
5256 /* Otherwise do a blocking wait. */
5257 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
5262 /* Wait until the remote machine stops, then return, storing status in
5263 STATUS just as `wait' would. */
5266 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
5268 struct remote_state
*rs
= get_remote_state ();
5269 ptid_t event_ptid
= null_ptid
;
5271 struct stop_reply
*stop_reply
;
5275 status
->kind
= TARGET_WAITKIND_IGNORE
;
5276 status
->value
.integer
= 0;
5278 stop_reply
= queued_stop_reply (ptid
);
5279 if (stop_reply
!= NULL
)
5280 return process_stop_reply (stop_reply
, status
);
5282 if (rs
->cached_wait_status
)
5283 /* Use the cached wait status, but only once. */
5284 rs
->cached_wait_status
= 0;
5289 if (!target_is_async_p ())
5291 ofunc
= signal (SIGINT
, remote_interrupt
);
5292 /* If the user hit C-c before this packet, or between packets,
5293 pretend that it was hit right here. */
5297 remote_interrupt (SIGINT
);
5301 /* FIXME: cagney/1999-09-27: If we're in async mode we should
5302 _never_ wait for ever -> test on target_is_async_p().
5303 However, before we do that we need to ensure that the caller
5304 knows how to take the target into/out of async mode. */
5305 ret
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, wait_forever_enabled_p
);
5306 if (!target_is_async_p ())
5307 signal (SIGINT
, ofunc
);
5312 remote_stopped_by_watchpoint_p
= 0;
5314 /* We got something. */
5315 rs
->waiting_for_stop_reply
= 0;
5317 /* Assume that the target has acknowledged Ctrl-C unless we receive
5318 an 'F' or 'O' packet. */
5319 if (buf
[0] != 'F' && buf
[0] != 'O')
5320 rs
->ctrlc_pending_p
= 0;
5324 case 'E': /* Error of some sort. */
5325 /* We're out of sync with the target now. Did it continue or
5326 not? Not is more likely, so report a stop. */
5327 warning (_("Remote failure reply: %s"), buf
);
5328 status
->kind
= TARGET_WAITKIND_STOPPED
;
5329 status
->value
.sig
= TARGET_SIGNAL_0
;
5331 case 'F': /* File-I/O request. */
5332 remote_fileio_request (buf
, rs
->ctrlc_pending_p
);
5333 rs
->ctrlc_pending_p
= 0;
5335 case 'T': case 'S': case 'X': case 'W':
5337 struct stop_reply
*stop_reply
;
5338 struct cleanup
*old_chain
;
5340 stop_reply
= stop_reply_xmalloc ();
5341 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
5342 remote_parse_stop_reply (buf
, stop_reply
);
5343 discard_cleanups (old_chain
);
5344 event_ptid
= process_stop_reply (stop_reply
, status
);
5347 case 'O': /* Console output. */
5348 remote_console_output (buf
+ 1);
5350 /* The target didn't really stop; keep waiting. */
5351 rs
->waiting_for_stop_reply
= 1;
5355 if (last_sent_signal
!= TARGET_SIGNAL_0
)
5357 /* Zero length reply means that we tried 'S' or 'C' and the
5358 remote system doesn't support it. */
5359 target_terminal_ours_for_output ();
5361 ("Can't send signals to this remote system. %s not sent.\n",
5362 target_signal_to_name (last_sent_signal
));
5363 last_sent_signal
= TARGET_SIGNAL_0
;
5364 target_terminal_inferior ();
5366 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
5367 putpkt ((char *) buf
);
5369 /* We just told the target to resume, so a stop reply is in
5371 rs
->waiting_for_stop_reply
= 1;
5374 /* else fallthrough */
5376 warning (_("Invalid remote reply: %s"), buf
);
5378 rs
->waiting_for_stop_reply
= 1;
5382 if (status
->kind
== TARGET_WAITKIND_IGNORE
)
5384 /* Nothing interesting happened. If we're doing a non-blocking
5385 poll, we're done. Otherwise, go back to waiting. */
5386 if (options
& TARGET_WNOHANG
)
5387 return minus_one_ptid
;
5391 else if (status
->kind
!= TARGET_WAITKIND_EXITED
5392 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
5394 if (!ptid_equal (event_ptid
, null_ptid
))
5395 record_currthread (event_ptid
);
5397 event_ptid
= inferior_ptid
;
5400 /* A process exit. Invalidate our notion of current thread. */
5401 record_currthread (minus_one_ptid
);
5406 /* Wait until the remote machine stops, then return, storing status in
5407 STATUS just as `wait' would. */
5410 remote_wait (struct target_ops
*ops
,
5411 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
5416 event_ptid
= remote_wait_ns (ptid
, status
, options
);
5418 event_ptid
= remote_wait_as (ptid
, status
, options
);
5420 if (target_can_async_p ())
5422 /* If there are are events left in the queue tell the event loop
5424 if (stop_reply_queue
)
5425 mark_async_event_handler (remote_async_inferior_event_token
);
5431 /* Fetch a single register using a 'p' packet. */
5434 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
5436 struct remote_state
*rs
= get_remote_state ();
5438 char regp
[MAX_REGISTER_SIZE
];
5441 if (remote_protocol_packets
[PACKET_p
].support
== PACKET_DISABLE
)
5444 if (reg
->pnum
== -1)
5449 p
+= hexnumstr (p
, reg
->pnum
);
5452 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5456 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
5460 case PACKET_UNKNOWN
:
5463 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
5464 gdbarch_register_name (get_regcache_arch (regcache
),
5469 /* If this register is unfetchable, tell the regcache. */
5472 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
5476 /* Otherwise, parse and supply the value. */
5482 error (_("fetch_register_using_p: early buf termination"));
5484 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
5487 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
5491 /* Fetch the registers included in the target's 'g' packet. */
5494 send_g_packet (void)
5496 struct remote_state
*rs
= get_remote_state ();
5499 sprintf (rs
->buf
, "g");
5500 remote_send (&rs
->buf
, &rs
->buf_size
);
5502 /* We can get out of synch in various cases. If the first character
5503 in the buffer is not a hex character, assume that has happened
5504 and try to fetch another packet to read. */
5505 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
5506 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
5507 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
5508 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
5511 fprintf_unfiltered (gdb_stdlog
,
5512 "Bad register packet; fetching a new packet\n");
5513 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5516 buf_len
= strlen (rs
->buf
);
5518 /* Sanity check the received packet. */
5519 if (buf_len
% 2 != 0)
5520 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
5526 process_g_packet (struct regcache
*regcache
)
5528 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
5529 struct remote_state
*rs
= get_remote_state ();
5530 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5535 buf_len
= strlen (rs
->buf
);
5537 /* Further sanity checks, with knowledge of the architecture. */
5538 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
5539 error (_("Remote 'g' packet reply is too long: %s"), rs
->buf
);
5541 /* Save the size of the packet sent to us by the target. It is used
5542 as a heuristic when determining the max size of packets that the
5543 target can safely receive. */
5544 if (rsa
->actual_register_packet_size
== 0)
5545 rsa
->actual_register_packet_size
= buf_len
;
5547 /* If this is smaller than we guessed the 'g' packet would be,
5548 update our records. A 'g' reply that doesn't include a register's
5549 value implies either that the register is not available, or that
5550 the 'p' packet must be used. */
5551 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
5553 rsa
->sizeof_g_packet
= buf_len
/ 2;
5555 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
5557 if (rsa
->regs
[i
].pnum
== -1)
5560 if (rsa
->regs
[i
].offset
>= rsa
->sizeof_g_packet
)
5561 rsa
->regs
[i
].in_g_packet
= 0;
5563 rsa
->regs
[i
].in_g_packet
= 1;
5567 regs
= alloca (rsa
->sizeof_g_packet
);
5569 /* Unimplemented registers read as all bits zero. */
5570 memset (regs
, 0, rsa
->sizeof_g_packet
);
5572 /* Reply describes registers byte by byte, each byte encoded as two
5573 hex characters. Suck them all up, then supply them to the
5574 register cacheing/storage mechanism. */
5577 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
5579 if (p
[0] == 0 || p
[1] == 0)
5580 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
5581 internal_error (__FILE__
, __LINE__
,
5582 "unexpected end of 'g' packet reply");
5584 if (p
[0] == 'x' && p
[1] == 'x')
5585 regs
[i
] = 0; /* 'x' */
5587 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
5591 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
5593 struct packet_reg
*r
= &rsa
->regs
[i
];
5597 if (r
->offset
* 2 >= strlen (rs
->buf
))
5598 /* This shouldn't happen - we adjusted in_g_packet above. */
5599 internal_error (__FILE__
, __LINE__
,
5600 "unexpected end of 'g' packet reply");
5601 else if (rs
->buf
[r
->offset
* 2] == 'x')
5603 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
5604 /* The register isn't available, mark it as such (at
5605 the same time setting the value to zero). */
5606 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
5609 regcache_raw_supply (regcache
, r
->regnum
,
5616 fetch_registers_using_g (struct regcache
*regcache
)
5619 process_g_packet (regcache
);
5623 remote_fetch_registers (struct target_ops
*ops
,
5624 struct regcache
*regcache
, int regnum
)
5626 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5629 set_general_thread (inferior_ptid
);
5633 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5635 gdb_assert (reg
!= NULL
);
5637 /* If this register might be in the 'g' packet, try that first -
5638 we are likely to read more than one register. If this is the
5639 first 'g' packet, we might be overly optimistic about its
5640 contents, so fall back to 'p'. */
5641 if (reg
->in_g_packet
)
5643 fetch_registers_using_g (regcache
);
5644 if (reg
->in_g_packet
)
5648 if (fetch_register_using_p (regcache
, reg
))
5651 /* This register is not available. */
5652 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
5657 fetch_registers_using_g (regcache
);
5659 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5660 if (!rsa
->regs
[i
].in_g_packet
)
5661 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
5663 /* This register is not available. */
5664 regcache_raw_supply (regcache
, i
, NULL
);
5668 /* Prepare to store registers. Since we may send them all (using a
5669 'G' request), we have to read out the ones we don't want to change
5673 remote_prepare_to_store (struct regcache
*regcache
)
5675 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5677 gdb_byte buf
[MAX_REGISTER_SIZE
];
5679 /* Make sure the entire registers array is valid. */
5680 switch (remote_protocol_packets
[PACKET_P
].support
)
5682 case PACKET_DISABLE
:
5683 case PACKET_SUPPORT_UNKNOWN
:
5684 /* Make sure all the necessary registers are cached. */
5685 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5686 if (rsa
->regs
[i
].in_g_packet
)
5687 regcache_raw_read (regcache
, rsa
->regs
[i
].regnum
, buf
);
5694 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
5695 packet was not recognized. */
5698 store_register_using_P (const struct regcache
*regcache
,
5699 struct packet_reg
*reg
)
5701 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
5702 struct remote_state
*rs
= get_remote_state ();
5703 /* Try storing a single register. */
5704 char *buf
= rs
->buf
;
5705 gdb_byte regp
[MAX_REGISTER_SIZE
];
5708 if (remote_protocol_packets
[PACKET_P
].support
== PACKET_DISABLE
)
5711 if (reg
->pnum
== -1)
5714 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
5715 p
= buf
+ strlen (buf
);
5716 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
5717 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
5719 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5721 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
5726 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
5727 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
5728 case PACKET_UNKNOWN
:
5731 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
5735 /* Store register REGNUM, or all registers if REGNUM == -1, from the
5736 contents of the register cache buffer. FIXME: ignores errors. */
5739 store_registers_using_G (const struct regcache
*regcache
)
5741 struct remote_state
*rs
= get_remote_state ();
5742 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5746 /* Extract all the registers in the regcache copying them into a
5751 regs
= alloca (rsa
->sizeof_g_packet
);
5752 memset (regs
, 0, rsa
->sizeof_g_packet
);
5753 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5755 struct packet_reg
*r
= &rsa
->regs
[i
];
5758 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
5762 /* Command describes registers byte by byte,
5763 each byte encoded as two hex characters. */
5766 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
5768 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
5770 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5771 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
5772 error (_("Could not write registers; remote failure reply '%s'"),
5776 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
5777 of the register cache buffer. FIXME: ignores errors. */
5780 remote_store_registers (struct target_ops
*ops
,
5781 struct regcache
*regcache
, int regnum
)
5783 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5786 set_general_thread (inferior_ptid
);
5790 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5792 gdb_assert (reg
!= NULL
);
5794 /* Always prefer to store registers using the 'P' packet if
5795 possible; we often change only a small number of registers.
5796 Sometimes we change a larger number; we'd need help from a
5797 higher layer to know to use 'G'. */
5798 if (store_register_using_P (regcache
, reg
))
5801 /* For now, don't complain if we have no way to write the
5802 register. GDB loses track of unavailable registers too
5803 easily. Some day, this may be an error. We don't have
5804 any way to read the register, either... */
5805 if (!reg
->in_g_packet
)
5808 store_registers_using_G (regcache
);
5812 store_registers_using_G (regcache
);
5814 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5815 if (!rsa
->regs
[i
].in_g_packet
)
5816 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
5817 /* See above for why we do not issue an error here. */
5822 /* Return the number of hex digits in num. */
5825 hexnumlen (ULONGEST num
)
5829 for (i
= 0; num
!= 0; i
++)
5835 /* Set BUF to the minimum number of hex digits representing NUM. */
5838 hexnumstr (char *buf
, ULONGEST num
)
5840 int len
= hexnumlen (num
);
5842 return hexnumnstr (buf
, num
, len
);
5846 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
5849 hexnumnstr (char *buf
, ULONGEST num
, int width
)
5855 for (i
= width
- 1; i
>= 0; i
--)
5857 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
5864 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
5867 remote_address_masked (CORE_ADDR addr
)
5869 int address_size
= remote_address_size
;
5871 /* If "remoteaddresssize" was not set, default to target address size. */
5873 address_size
= gdbarch_addr_bit (target_gdbarch
);
5875 if (address_size
> 0
5876 && address_size
< (sizeof (ULONGEST
) * 8))
5878 /* Only create a mask when that mask can safely be constructed
5879 in a ULONGEST variable. */
5882 mask
= (mask
<< address_size
) - 1;
5888 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
5889 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
5890 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
5891 (which may be more than *OUT_LEN due to escape characters). The
5892 total number of bytes in the output buffer will be at most
5896 remote_escape_output (const gdb_byte
*buffer
, int len
,
5897 gdb_byte
*out_buf
, int *out_len
,
5900 int input_index
, output_index
;
5903 for (input_index
= 0; input_index
< len
; input_index
++)
5905 gdb_byte b
= buffer
[input_index
];
5907 if (b
== '$' || b
== '#' || b
== '}')
5909 /* These must be escaped. */
5910 if (output_index
+ 2 > out_maxlen
)
5912 out_buf
[output_index
++] = '}';
5913 out_buf
[output_index
++] = b
^ 0x20;
5917 if (output_index
+ 1 > out_maxlen
)
5919 out_buf
[output_index
++] = b
;
5923 *out_len
= input_index
;
5924 return output_index
;
5927 /* Convert BUFFER, escaped data LEN bytes long, into binary data
5928 in OUT_BUF. Return the number of bytes written to OUT_BUF.
5929 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
5931 This function reverses remote_escape_output. It allows more
5932 escaped characters than that function does, in particular because
5933 '*' must be escaped to avoid the run-length encoding processing
5934 in reading packets. */
5937 remote_unescape_input (const gdb_byte
*buffer
, int len
,
5938 gdb_byte
*out_buf
, int out_maxlen
)
5940 int input_index
, output_index
;
5945 for (input_index
= 0; input_index
< len
; input_index
++)
5947 gdb_byte b
= buffer
[input_index
];
5949 if (output_index
+ 1 > out_maxlen
)
5951 warning (_("Received too much data from remote target;"
5952 " ignoring overflow."));
5953 return output_index
;
5958 out_buf
[output_index
++] = b
^ 0x20;
5964 out_buf
[output_index
++] = b
;
5968 error (_("Unmatched escape character in target response."));
5970 return output_index
;
5973 /* Determine whether the remote target supports binary downloading.
5974 This is accomplished by sending a no-op memory write of zero length
5975 to the target at the specified address. It does not suffice to send
5976 the whole packet, since many stubs strip the eighth bit and
5977 subsequently compute a wrong checksum, which causes real havoc with
5980 NOTE: This can still lose if the serial line is not eight-bit
5981 clean. In cases like this, the user should clear "remote
5985 check_binary_download (CORE_ADDR addr
)
5987 struct remote_state
*rs
= get_remote_state ();
5989 switch (remote_protocol_packets
[PACKET_X
].support
)
5991 case PACKET_DISABLE
:
5995 case PACKET_SUPPORT_UNKNOWN
:
6001 p
+= hexnumstr (p
, (ULONGEST
) addr
);
6003 p
+= hexnumstr (p
, (ULONGEST
) 0);
6007 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
6008 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6010 if (rs
->buf
[0] == '\0')
6013 fprintf_unfiltered (gdb_stdlog
,
6014 "binary downloading NOT suppported by target\n");
6015 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
6020 fprintf_unfiltered (gdb_stdlog
,
6021 "binary downloading suppported by target\n");
6022 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
6029 /* Write memory data directly to the remote machine.
6030 This does not inform the data cache; the data cache uses this.
6031 HEADER is the starting part of the packet.
6032 MEMADDR is the address in the remote memory space.
6033 MYADDR is the address of the buffer in our space.
6034 LEN is the number of bytes.
6035 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
6036 should send data as binary ('X'), or hex-encoded ('M').
6038 The function creates packet of the form
6039 <HEADER><ADDRESS>,<LENGTH>:<DATA>
6041 where encoding of <DATA> is termined by PACKET_FORMAT.
6043 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
6046 Returns the number of bytes transferred, or 0 (setting errno) for
6047 error. Only transfer a single packet. */
6050 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
6051 const gdb_byte
*myaddr
, int len
,
6052 char packet_format
, int use_length
)
6054 struct remote_state
*rs
= get_remote_state ();
6064 if (packet_format
!= 'X' && packet_format
!= 'M')
6065 internal_error (__FILE__
, __LINE__
,
6066 "remote_write_bytes_aux: bad packet format");
6071 payload_size
= get_memory_write_packet_size ();
6073 /* The packet buffer will be large enough for the payload;
6074 get_memory_packet_size ensures this. */
6077 /* Compute the size of the actual payload by subtracting out the
6078 packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
6080 payload_size
-= strlen ("$,:#NN");
6082 /* The comma won't be used. */
6084 header_length
= strlen (header
);
6085 payload_size
-= header_length
;
6086 payload_size
-= hexnumlen (memaddr
);
6088 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
6090 strcat (rs
->buf
, header
);
6091 p
= rs
->buf
+ strlen (header
);
6093 /* Compute a best guess of the number of bytes actually transfered. */
6094 if (packet_format
== 'X')
6096 /* Best guess at number of bytes that will fit. */
6097 todo
= min (len
, payload_size
);
6099 payload_size
-= hexnumlen (todo
);
6100 todo
= min (todo
, payload_size
);
6104 /* Num bytes that will fit. */
6105 todo
= min (len
, payload_size
/ 2);
6107 payload_size
-= hexnumlen (todo
);
6108 todo
= min (todo
, payload_size
/ 2);
6112 internal_error (__FILE__
, __LINE__
,
6113 _("minumum packet size too small to write data"));
6115 /* If we already need another packet, then try to align the end
6116 of this packet to a useful boundary. */
6117 if (todo
> 2 * REMOTE_ALIGN_WRITES
&& todo
< len
)
6118 todo
= ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
6120 /* Append "<memaddr>". */
6121 memaddr
= remote_address_masked (memaddr
);
6122 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
6129 /* Append <len>. Retain the location/size of <len>. It may need to
6130 be adjusted once the packet body has been created. */
6132 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
6140 /* Append the packet body. */
6141 if (packet_format
== 'X')
6143 /* Binary mode. Send target system values byte by byte, in
6144 increasing byte addresses. Only escape certain critical
6146 payload_length
= remote_escape_output (myaddr
, todo
, p
, &nr_bytes
,
6149 /* If not all TODO bytes fit, then we'll need another packet. Make
6150 a second try to keep the end of the packet aligned. Don't do
6151 this if the packet is tiny. */
6152 if (nr_bytes
< todo
&& nr_bytes
> 2 * REMOTE_ALIGN_WRITES
)
6156 new_nr_bytes
= (((memaddr
+ nr_bytes
) & ~(REMOTE_ALIGN_WRITES
- 1))
6158 if (new_nr_bytes
!= nr_bytes
)
6159 payload_length
= remote_escape_output (myaddr
, new_nr_bytes
,
6164 p
+= payload_length
;
6165 if (use_length
&& nr_bytes
< todo
)
6167 /* Escape chars have filled up the buffer prematurely,
6168 and we have actually sent fewer bytes than planned.
6169 Fix-up the length field of the packet. Use the same
6170 number of characters as before. */
6171 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
6172 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
6177 /* Normal mode: Send target system values byte by byte, in
6178 increasing byte addresses. Each byte is encoded as a two hex
6180 nr_bytes
= bin2hex (myaddr
, p
, todo
);
6184 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
6185 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6187 if (rs
->buf
[0] == 'E')
6189 /* There is no correspondance between what the remote protocol
6190 uses for errors and errno codes. We would like a cleaner way
6191 of representing errors (big enough to include errno codes,
6192 bfd_error codes, and others). But for now just return EIO. */
6197 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
6198 fewer bytes than we'd planned. */
6202 /* Write memory data directly to the remote machine.
6203 This does not inform the data cache; the data cache uses this.
6204 MEMADDR is the address in the remote memory space.
6205 MYADDR is the address of the buffer in our space.
6206 LEN is the number of bytes.
6208 Returns number of bytes transferred, or 0 (setting errno) for
6209 error. Only transfer a single packet. */
6212 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, int len
)
6214 char *packet_format
= 0;
6216 /* Check whether the target supports binary download. */
6217 check_binary_download (memaddr
);
6219 switch (remote_protocol_packets
[PACKET_X
].support
)
6222 packet_format
= "X";
6224 case PACKET_DISABLE
:
6225 packet_format
= "M";
6227 case PACKET_SUPPORT_UNKNOWN
:
6228 internal_error (__FILE__
, __LINE__
,
6229 _("remote_write_bytes: bad internal state"));
6231 internal_error (__FILE__
, __LINE__
, _("bad switch"));
6234 return remote_write_bytes_aux (packet_format
,
6235 memaddr
, myaddr
, len
, packet_format
[0], 1);
6238 /* Read memory data directly from the remote machine.
6239 This does not use the data cache; the data cache uses this.
6240 MEMADDR is the address in the remote memory space.
6241 MYADDR is the address of the buffer in our space.
6242 LEN is the number of bytes.
6244 Returns number of bytes transferred, or 0 for error. */
6246 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
6247 remote targets) shouldn't attempt to read the entire buffer.
6248 Instead it should read a single packet worth of data and then
6249 return the byte size of that packet to the caller. The caller (its
6250 caller and its callers caller ;-) already contains code for
6251 handling partial reads. */
6254 remote_read_bytes (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
6256 struct remote_state
*rs
= get_remote_state ();
6257 int max_buf_size
; /* Max size of packet output buffer. */
6263 max_buf_size
= get_memory_read_packet_size ();
6264 /* The packet buffer will be large enough for the payload;
6265 get_memory_packet_size ensures this. */
6274 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
6276 /* construct "m"<memaddr>","<len>" */
6277 /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */
6278 memaddr
= remote_address_masked (memaddr
);
6281 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
6283 p
+= hexnumstr (p
, (ULONGEST
) todo
);
6287 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6289 if (rs
->buf
[0] == 'E'
6290 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
6291 && rs
->buf
[3] == '\0')
6293 /* There is no correspondance between what the remote
6294 protocol uses for errors and errno codes. We would like
6295 a cleaner way of representing errors (big enough to
6296 include errno codes, bfd_error codes, and others). But
6297 for now just return EIO. */
6302 /* Reply describes memory byte by byte,
6303 each byte encoded as two hex characters. */
6306 if ((i
= hex2bin (p
, myaddr
, todo
)) < todo
)
6308 /* Reply is short. This means that we were able to read
6309 only part of what we wanted to. */
6310 return i
+ (origlen
- len
);
6320 /* Remote notification handler. */
6323 handle_notification (char *buf
, size_t length
)
6325 if (strncmp (buf
, "Stop:", 5) == 0)
6327 if (pending_stop_reply
)
6329 /* We've already parsed the in-flight stop-reply, but the
6330 stub for some reason thought we didn't, possibly due to
6331 timeout on its side. Just ignore it. */
6333 fprintf_unfiltered (gdb_stdlog
, "ignoring resent notification\n");
6337 struct cleanup
*old_chain
;
6338 struct stop_reply
*reply
= stop_reply_xmalloc ();
6340 old_chain
= make_cleanup (do_stop_reply_xfree
, reply
);
6342 remote_parse_stop_reply (buf
+ 5, reply
);
6344 discard_cleanups (old_chain
);
6346 /* Be careful to only set it after parsing, since an error
6347 may be thrown then. */
6348 pending_stop_reply
= reply
;
6350 /* Notify the event loop there's a stop reply to acknowledge
6351 and that there may be more events to fetch. */
6352 mark_async_event_handler (remote_async_get_pending_events_token
);
6355 fprintf_unfiltered (gdb_stdlog
, "stop notification captured\n");
6359 /* We ignore notifications we don't recognize, for compatibility
6360 with newer stubs. */
6365 /* Read or write LEN bytes from inferior memory at MEMADDR,
6366 transferring to or from debugger address BUFFER. Write to inferior
6367 if SHOULD_WRITE is nonzero. Returns length of data written or
6368 read; 0 for error. TARGET is unused. */
6371 remote_xfer_memory (CORE_ADDR mem_addr
, gdb_byte
*buffer
, int mem_len
,
6372 int should_write
, struct mem_attrib
*attrib
,
6373 struct target_ops
*target
)
6377 set_general_thread (inferior_ptid
);
6380 res
= remote_write_bytes (mem_addr
, buffer
, mem_len
);
6382 res
= remote_read_bytes (mem_addr
, buffer
, mem_len
);
6387 /* Sends a packet with content determined by the printf format string
6388 FORMAT and the remaining arguments, then gets the reply. Returns
6389 whether the packet was a success, a failure, or unknown. */
6391 static enum packet_result
6392 remote_send_printf (const char *format
, ...)
6394 struct remote_state
*rs
= get_remote_state ();
6395 int max_size
= get_remote_packet_size ();
6398 va_start (ap
, format
);
6401 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
6402 internal_error (__FILE__
, __LINE__
, "Too long remote packet.");
6404 if (putpkt (rs
->buf
) < 0)
6405 error (_("Communication problem with target."));
6408 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6410 return packet_check_result (rs
->buf
);
6414 restore_remote_timeout (void *p
)
6416 int value
= *(int *)p
;
6418 remote_timeout
= value
;
6421 /* Flash writing can take quite some time. We'll set
6422 effectively infinite timeout for flash operations.
6423 In future, we'll need to decide on a better approach. */
6424 static const int remote_flash_timeout
= 1000;
6427 remote_flash_erase (struct target_ops
*ops
,
6428 ULONGEST address
, LONGEST length
)
6430 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
6431 int saved_remote_timeout
= remote_timeout
;
6432 enum packet_result ret
;
6433 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
6434 &saved_remote_timeout
);
6436 remote_timeout
= remote_flash_timeout
;
6438 ret
= remote_send_printf ("vFlashErase:%s,%s",
6439 phex (address
, addr_size
),
6443 case PACKET_UNKNOWN
:
6444 error (_("Remote target does not support flash erase"));
6446 error (_("Error erasing flash with vFlashErase packet"));
6451 do_cleanups (back_to
);
6455 remote_flash_write (struct target_ops
*ops
,
6456 ULONGEST address
, LONGEST length
,
6457 const gdb_byte
*data
)
6459 int saved_remote_timeout
= remote_timeout
;
6461 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
6462 &saved_remote_timeout
);
6464 remote_timeout
= remote_flash_timeout
;
6465 ret
= remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 'X', 0);
6466 do_cleanups (back_to
);
6472 remote_flash_done (struct target_ops
*ops
)
6474 int saved_remote_timeout
= remote_timeout
;
6476 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
6477 &saved_remote_timeout
);
6479 remote_timeout
= remote_flash_timeout
;
6480 ret
= remote_send_printf ("vFlashDone");
6481 do_cleanups (back_to
);
6485 case PACKET_UNKNOWN
:
6486 error (_("Remote target does not support vFlashDone"));
6488 error (_("Error finishing flash operation"));
6495 remote_files_info (struct target_ops
*ignore
)
6497 puts_filtered ("Debugging a target over a serial line.\n");
6500 /* Stuff for dealing with the packets which are part of this protocol.
6501 See comment at top of file for details. */
6503 /* Read a single character from the remote end. */
6506 readchar (int timeout
)
6510 ch
= serial_readchar (remote_desc
, timeout
);
6515 switch ((enum serial_rc
) ch
)
6519 error (_("Remote connection closed"));
6522 perror_with_name (_("Remote communication error"));
6524 case SERIAL_TIMEOUT
:
6530 /* Send the command in *BUF to the remote machine, and read the reply
6531 into *BUF. Report an error if we get an error reply. Resize
6532 *BUF using xrealloc if necessary to hold the result, and update
6536 remote_send (char **buf
,
6540 getpkt (buf
, sizeof_buf
, 0);
6542 if ((*buf
)[0] == 'E')
6543 error (_("Remote failure reply: %s"), *buf
);
6546 /* Return a pointer to an xmalloc'ed string representing an escaped
6547 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
6548 etc. The caller is responsible for releasing the returned
6552 escape_buffer (const char *buf
, int n
)
6554 struct cleanup
*old_chain
;
6555 struct ui_file
*stb
;
6558 stb
= mem_fileopen ();
6559 old_chain
= make_cleanup_ui_file_delete (stb
);
6561 fputstrn_unfiltered (buf
, n
, 0, stb
);
6562 str
= ui_file_xstrdup (stb
, NULL
);
6563 do_cleanups (old_chain
);
6567 /* Display a null-terminated packet on stdout, for debugging, using C
6571 print_packet (char *buf
)
6573 puts_filtered ("\"");
6574 fputstr_filtered (buf
, '"', gdb_stdout
);
6575 puts_filtered ("\"");
6581 return putpkt_binary (buf
, strlen (buf
));
6584 /* Send a packet to the remote machine, with error checking. The data
6585 of the packet is in BUF. The string in BUF can be at most
6586 get_remote_packet_size () - 5 to account for the $, # and checksum,
6587 and for a possible /0 if we are debugging (remote_debug) and want
6588 to print the sent packet as a string. */
6591 putpkt_binary (char *buf
, int cnt
)
6593 struct remote_state
*rs
= get_remote_state ();
6595 unsigned char csum
= 0;
6596 char *buf2
= alloca (cnt
+ 6);
6602 /* Catch cases like trying to read memory or listing threads while
6603 we're waiting for a stop reply. The remote server wouldn't be
6604 ready to handle this request, so we'd hang and timeout. We don't
6605 have to worry about this in synchronous mode, because in that
6606 case it's not possible to issue a command while the target is
6607 running. This is not a problem in non-stop mode, because in that
6608 case, the stub is always ready to process serial input. */
6609 if (!non_stop
&& target_can_async_p () && rs
->waiting_for_stop_reply
)
6610 error (_("Cannot execute this command while the target is running."));
6612 /* We're sending out a new packet. Make sure we don't look at a
6613 stale cached response. */
6614 rs
->cached_wait_status
= 0;
6616 /* Copy the packet into buffer BUF2, encapsulating it
6617 and giving it a checksum. */
6622 for (i
= 0; i
< cnt
; i
++)
6628 *p
++ = tohex ((csum
>> 4) & 0xf);
6629 *p
++ = tohex (csum
& 0xf);
6631 /* Send it over and over until we get a positive ack. */
6635 int started_error_output
= 0;
6639 struct cleanup
*old_chain
;
6643 str
= escape_buffer (buf2
, p
- buf2
);
6644 old_chain
= make_cleanup (xfree
, str
);
6645 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s...", str
);
6646 gdb_flush (gdb_stdlog
);
6647 do_cleanups (old_chain
);
6649 if (serial_write (remote_desc
, buf2
, p
- buf2
))
6650 perror_with_name (_("putpkt: write failed"));
6652 /* If this is a no acks version of the remote protocol, send the
6653 packet and move on. */
6657 /* Read until either a timeout occurs (-2) or '+' is read.
6658 Handle any notification that arrives in the mean time. */
6661 ch
= readchar (remote_timeout
);
6669 case SERIAL_TIMEOUT
:
6672 if (started_error_output
)
6674 putchar_unfiltered ('\n');
6675 started_error_output
= 0;
6684 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
6688 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
6689 case SERIAL_TIMEOUT
:
6693 break; /* Retransmit buffer. */
6697 fprintf_unfiltered (gdb_stdlog
,
6698 "Packet instead of Ack, ignoring it\n");
6699 /* It's probably an old response sent because an ACK
6700 was lost. Gobble up the packet and ack it so it
6701 doesn't get retransmitted when we resend this
6704 serial_write (remote_desc
, "+", 1);
6705 continue; /* Now, go look for +. */
6712 /* If we got a notification, handle it, and go back to looking
6714 /* We've found the start of a notification. Now
6715 collect the data. */
6716 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
6721 struct cleanup
*old_chain
;
6724 str
= escape_buffer (rs
->buf
, val
);
6725 old_chain
= make_cleanup (xfree
, str
);
6726 fprintf_unfiltered (gdb_stdlog
,
6727 " Notification received: %s\n",
6729 do_cleanups (old_chain
);
6731 handle_notification (rs
->buf
, val
);
6732 /* We're in sync now, rewait for the ack. */
6739 if (!started_error_output
)
6741 started_error_output
= 1;
6742 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6744 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6745 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
6754 if (!started_error_output
)
6756 started_error_output
= 1;
6757 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6759 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6763 break; /* Here to retransmit. */
6767 /* This is wrong. If doing a long backtrace, the user should be
6768 able to get out next time we call QUIT, without anything as
6769 violent as interrupt_query. If we want to provide a way out of
6770 here without getting to the next QUIT, it should be based on
6771 hitting ^C twice as in remote_wait. */
6782 /* Come here after finding the start of a frame when we expected an
6783 ack. Do our best to discard the rest of this packet. */
6792 c
= readchar (remote_timeout
);
6795 case SERIAL_TIMEOUT
:
6796 /* Nothing we can do. */
6799 /* Discard the two bytes of checksum and stop. */
6800 c
= readchar (remote_timeout
);
6802 c
= readchar (remote_timeout
);
6805 case '*': /* Run length encoding. */
6806 /* Discard the repeat count. */
6807 c
= readchar (remote_timeout
);
6812 /* A regular character. */
6818 /* Come here after finding the start of the frame. Collect the rest
6819 into *BUF, verifying the checksum, length, and handling run-length
6820 compression. NUL terminate the buffer. If there is not enough room,
6821 expand *BUF using xrealloc.
6823 Returns -1 on error, number of characters in buffer (ignoring the
6824 trailing NULL) on success. (could be extended to return one of the
6825 SERIAL status indications). */
6828 read_frame (char **buf_p
,
6835 struct remote_state
*rs
= get_remote_state ();
6842 c
= readchar (remote_timeout
);
6845 case SERIAL_TIMEOUT
:
6847 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
6851 fputs_filtered ("Saw new packet start in middle of old one\n",
6853 return -1; /* Start a new packet, count retries. */
6856 unsigned char pktcsum
;
6862 check_0
= readchar (remote_timeout
);
6864 check_1
= readchar (remote_timeout
);
6866 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
6869 fputs_filtered ("Timeout in checksum, retrying\n",
6873 else if (check_0
< 0 || check_1
< 0)
6876 fputs_filtered ("Communication error in checksum\n",
6881 /* Don't recompute the checksum; with no ack packets we
6882 don't have any way to indicate a packet retransmission
6887 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
6888 if (csum
== pktcsum
)
6893 struct cleanup
*old_chain
;
6896 str
= escape_buffer (buf
, bc
);
6897 old_chain
= make_cleanup (xfree
, str
);
6898 fprintf_unfiltered (gdb_stdlog
,
6900 Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n",
6901 pktcsum
, csum
, str
);
6902 do_cleanups (old_chain
);
6904 /* Number of characters in buffer ignoring trailing
6908 case '*': /* Run length encoding. */
6913 c
= readchar (remote_timeout
);
6915 repeat
= c
- ' ' + 3; /* Compute repeat count. */
6917 /* The character before ``*'' is repeated. */
6919 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
6921 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
6923 /* Make some more room in the buffer. */
6924 *sizeof_buf
+= repeat
;
6925 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
6929 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
6935 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
6939 if (bc
>= *sizeof_buf
- 1)
6941 /* Make some more room in the buffer. */
6943 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
6954 /* Read a packet from the remote machine, with error checking, and
6955 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6956 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6957 rather than timing out; this is used (in synchronous mode) to wait
6958 for a target that is is executing user code to stop. */
6959 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
6960 don't have to change all the calls to getpkt to deal with the
6961 return value, because at the moment I don't know what the right
6962 thing to do it for those. */
6970 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
6974 /* Read a packet from the remote machine, with error checking, and
6975 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6976 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6977 rather than timing out; this is used (in synchronous mode) to wait
6978 for a target that is is executing user code to stop. If FOREVER ==
6979 0, this function is allowed to time out gracefully and return an
6980 indication of this to the caller. Otherwise return the number of
6981 bytes read. If EXPECTING_NOTIF, consider receiving a notification
6982 enough reason to return to the caller. */
6985 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
6986 int expecting_notif
)
6988 struct remote_state
*rs
= get_remote_state ();
6994 /* We're reading a new response. Make sure we don't look at a
6995 previously cached response. */
6996 rs
->cached_wait_status
= 0;
6998 strcpy (*buf
, "timeout");
7001 timeout
= watchdog
> 0 ? watchdog
: -1;
7002 else if (expecting_notif
)
7003 timeout
= 0; /* There should already be a char in the buffer. If
7006 timeout
= remote_timeout
;
7010 /* Process any number of notifications, and then return when
7014 /* If we get a timeout or bad checksm, retry up to MAX_TRIES
7016 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
7018 /* This can loop forever if the remote side sends us
7019 characters continuously, but if it pauses, we'll get
7020 SERIAL_TIMEOUT from readchar because of timeout. Then
7021 we'll count that as a retry.
7023 Note that even when forever is set, we will only wait
7024 forever prior to the start of a packet. After that, we
7025 expect characters to arrive at a brisk pace. They should
7026 show up within remote_timeout intervals. */
7028 c
= readchar (timeout
);
7029 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
7031 if (c
== SERIAL_TIMEOUT
)
7033 if (expecting_notif
)
7034 return -1; /* Don't complain, it's normal to not get
7035 anything in this case. */
7037 if (forever
) /* Watchdog went off? Kill the target. */
7041 error (_("Watchdog timeout has expired. Target detached."));
7044 fputs_filtered ("Timed out.\n", gdb_stdlog
);
7048 /* We've found the start of a packet or notification.
7049 Now collect the data. */
7050 val
= read_frame (buf
, sizeof_buf
);
7055 serial_write (remote_desc
, "-", 1);
7058 if (tries
> MAX_TRIES
)
7060 /* We have tried hard enough, and just can't receive the
7061 packet/notification. Give up. */
7062 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
7064 /* Skip the ack char if we're in no-ack mode. */
7065 if (!rs
->noack_mode
)
7066 serial_write (remote_desc
, "+", 1);
7070 /* If we got an ordinary packet, return that to our caller. */
7075 struct cleanup
*old_chain
;
7078 str
= escape_buffer (*buf
, val
);
7079 old_chain
= make_cleanup (xfree
, str
);
7080 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s\n", str
);
7081 do_cleanups (old_chain
);
7084 /* Skip the ack char if we're in no-ack mode. */
7085 if (!rs
->noack_mode
)
7086 serial_write (remote_desc
, "+", 1);
7090 /* If we got a notification, handle it, and go back to looking
7094 gdb_assert (c
== '%');
7098 struct cleanup
*old_chain
;
7101 str
= escape_buffer (*buf
, val
);
7102 old_chain
= make_cleanup (xfree
, str
);
7103 fprintf_unfiltered (gdb_stdlog
,
7104 " Notification received: %s\n",
7106 do_cleanups (old_chain
);
7109 handle_notification (*buf
, val
);
7111 /* Notifications require no acknowledgement. */
7113 if (expecting_notif
)
7120 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
7122 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0);
7126 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
)
7128 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1);
7133 remote_kill (struct target_ops
*ops
)
7135 /* Use catch_errors so the user can quit from gdb even when we
7136 aren't on speaking terms with the remote system. */
7137 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
7139 /* Don't wait for it to die. I'm not really sure it matters whether
7140 we do or not. For the existing stubs, kill is a noop. */
7141 target_mourn_inferior ();
7145 remote_vkill (int pid
, struct remote_state
*rs
)
7147 if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
7150 /* Tell the remote target to detach. */
7151 sprintf (rs
->buf
, "vKill;%x", pid
);
7153 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7155 if (packet_ok (rs
->buf
,
7156 &remote_protocol_packets
[PACKET_vKill
]) == PACKET_OK
)
7158 else if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
7165 extended_remote_kill (struct target_ops
*ops
)
7168 int pid
= ptid_get_pid (inferior_ptid
);
7169 struct remote_state
*rs
= get_remote_state ();
7171 res
= remote_vkill (pid
, rs
);
7172 if (res
== -1 && !remote_multi_process_p (rs
))
7174 /* Don't try 'k' on a multi-process aware stub -- it has no way
7175 to specify the pid. */
7179 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7180 if (rs
->buf
[0] != 'O' || rs
->buf
[0] != 'K')
7183 /* Don't wait for it to die. I'm not really sure it matters whether
7184 we do or not. For the existing stubs, kill is a noop. */
7190 error (_("Can't kill process"));
7192 target_mourn_inferior ();
7196 remote_mourn (struct target_ops
*ops
)
7198 remote_mourn_1 (ops
);
7201 /* Worker function for remote_mourn. */
7203 remote_mourn_1 (struct target_ops
*target
)
7205 unpush_target (target
);
7207 /* remote_close takes care of doing most of the clean up. */
7208 generic_mourn_inferior ();
7212 extended_remote_mourn_1 (struct target_ops
*target
)
7214 struct remote_state
*rs
= get_remote_state ();
7216 /* In case we got here due to an error, but we're going to stay
7218 rs
->waiting_for_stop_reply
= 0;
7220 /* We're no longer interested in these events. */
7221 discard_pending_stop_replies (ptid_get_pid (inferior_ptid
));
7223 /* If the current general thread belonged to the process we just
7224 detached from or has exited, the remote side current general
7225 thread becomes undefined. Considering a case like this:
7227 - We just got here due to a detach.
7228 - The process that we're detaching from happens to immediately
7229 report a global breakpoint being hit in non-stop mode, in the
7230 same thread we had selected before.
7231 - GDB attaches to this process again.
7232 - This event happens to be the next event we handle.
7234 GDB would consider that the current general thread didn't need to
7235 be set on the stub side (with Hg), since for all it knew,
7236 GENERAL_THREAD hadn't changed.
7238 Notice that although in all-stop mode, the remote server always
7239 sets the current thread to the thread reporting the stop event,
7240 that doesn't happen in non-stop mode; in non-stop, the stub *must
7241 not* change the current thread when reporting a breakpoint hit,
7242 due to the decoupling of event reporting and event handling.
7244 To keep things simple, we always invalidate our notion of the
7246 record_currthread (minus_one_ptid
);
7248 /* Unlike "target remote", we do not want to unpush the target; then
7249 the next time the user says "run", we won't be connected. */
7251 /* Call common code to mark the inferior as not running. */
7252 generic_mourn_inferior ();
7254 if (!have_inferiors ())
7256 if (!remote_multi_process_p (rs
))
7258 /* Check whether the target is running now - some remote stubs
7259 automatically restart after kill. */
7261 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7263 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
7265 /* Assume that the target has been restarted. Set inferior_ptid
7266 so that bits of core GDB realizes there's something here, e.g.,
7267 so that the user can say "kill" again. */
7268 inferior_ptid
= magic_null_ptid
;
7275 extended_remote_mourn (struct target_ops
*ops
)
7277 extended_remote_mourn_1 (ops
);
7281 extended_remote_run (char *args
)
7283 struct remote_state
*rs
= get_remote_state ();
7286 /* If the user has disabled vRun support, or we have detected that
7287 support is not available, do not try it. */
7288 if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
7291 strcpy (rs
->buf
, "vRun;");
7292 len
= strlen (rs
->buf
);
7294 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
7295 error (_("Remote file name too long for run packet"));
7296 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
, 0);
7298 gdb_assert (args
!= NULL
);
7301 struct cleanup
*back_to
;
7305 argv
= gdb_buildargv (args
);
7306 back_to
= make_cleanup ((void (*) (void *)) freeargv
, argv
);
7307 for (i
= 0; argv
[i
] != NULL
; i
++)
7309 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
7310 error (_("Argument list too long for run packet"));
7311 rs
->buf
[len
++] = ';';
7312 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
, 0);
7314 do_cleanups (back_to
);
7317 rs
->buf
[len
++] = '\0';
7320 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7322 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]) == PACKET_OK
)
7324 /* We have a wait response; we don't need it, though. All is well. */
7327 else if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
7328 /* It wasn't disabled before, but it is now. */
7332 if (remote_exec_file
[0] == '\0')
7333 error (_("Running the default executable on the remote target failed; "
7334 "try \"set remote exec-file\"?"));
7336 error (_("Running \"%s\" on the remote target failed"),
7341 /* In the extended protocol we want to be able to do things like
7342 "run" and have them basically work as expected. So we need
7343 a special create_inferior function. We support changing the
7344 executable file and the command line arguments, but not the
7348 extended_remote_create_inferior_1 (char *exec_file
, char *args
,
7349 char **env
, int from_tty
)
7351 /* If running asynchronously, register the target file descriptor
7352 with the event loop. */
7353 if (target_can_async_p ())
7354 target_async (inferior_event_handler
, 0);
7356 /* Now restart the remote server. */
7357 if (extended_remote_run (args
) == -1)
7359 /* vRun was not supported. Fail if we need it to do what the
7361 if (remote_exec_file
[0])
7362 error (_("Remote target does not support \"set remote exec-file\""));
7364 error (_("Remote target does not support \"set args\" or run <ARGS>"));
7366 /* Fall back to "R". */
7367 extended_remote_restart ();
7370 if (!have_inferiors ())
7372 /* Clean up from the last time we ran, before we mark the target
7373 running again. This will mark breakpoints uninserted, and
7374 get_offsets may insert breakpoints. */
7375 init_thread_list ();
7376 init_wait_for_inferior ();
7379 /* Now mark the inferior as running before we do anything else. */
7380 inferior_ptid
= magic_null_ptid
;
7382 /* Now, if we have thread information, update inferior_ptid. */
7383 inferior_ptid
= remote_current_thread (inferior_ptid
);
7385 remote_add_inferior (ptid_get_pid (inferior_ptid
), 0);
7386 add_thread_silent (inferior_ptid
);
7388 /* Get updated offsets, if the stub uses qOffsets. */
7393 extended_remote_create_inferior (struct target_ops
*ops
,
7394 char *exec_file
, char *args
,
7395 char **env
, int from_tty
)
7397 extended_remote_create_inferior_1 (exec_file
, args
, env
, from_tty
);
7401 /* Insert a breakpoint. On targets that have software breakpoint
7402 support, we ask the remote target to do the work; on targets
7403 which don't, we insert a traditional memory breakpoint. */
7406 remote_insert_breakpoint (struct gdbarch
*gdbarch
,
7407 struct bp_target_info
*bp_tgt
)
7409 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
7410 If it succeeds, then set the support to PACKET_ENABLE. If it
7411 fails, and the user has explicitly requested the Z support then
7412 report an error, otherwise, mark it disabled and go on. */
7414 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
7416 CORE_ADDR addr
= bp_tgt
->placed_address
;
7417 struct remote_state
*rs
;
7421 gdbarch_remote_breakpoint_from_pc (gdbarch
, &addr
, &bpsize
);
7423 rs
= get_remote_state ();
7429 addr
= (ULONGEST
) remote_address_masked (addr
);
7430 p
+= hexnumstr (p
, addr
);
7431 sprintf (p
, ",%d", bpsize
);
7434 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7436 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
7441 bp_tgt
->placed_address
= addr
;
7442 bp_tgt
->placed_size
= bpsize
;
7444 case PACKET_UNKNOWN
:
7449 return memory_insert_breakpoint (gdbarch
, bp_tgt
);
7453 remote_remove_breakpoint (struct gdbarch
*gdbarch
,
7454 struct bp_target_info
*bp_tgt
)
7456 CORE_ADDR addr
= bp_tgt
->placed_address
;
7457 struct remote_state
*rs
= get_remote_state ();
7459 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
7467 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
7468 p
+= hexnumstr (p
, addr
);
7469 sprintf (p
, ",%d", bp_tgt
->placed_size
);
7472 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7474 return (rs
->buf
[0] == 'E');
7477 return memory_remove_breakpoint (gdbarch
, bp_tgt
);
7481 watchpoint_to_Z_packet (int type
)
7486 return Z_PACKET_WRITE_WP
;
7489 return Z_PACKET_READ_WP
;
7492 return Z_PACKET_ACCESS_WP
;
7495 internal_error (__FILE__
, __LINE__
,
7496 _("hw_bp_to_z: bad watchpoint type %d"), type
);
7501 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
7503 struct remote_state
*rs
= get_remote_state ();
7505 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
7507 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
7510 sprintf (rs
->buf
, "Z%x,", packet
);
7511 p
= strchr (rs
->buf
, '\0');
7512 addr
= remote_address_masked (addr
);
7513 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7514 sprintf (p
, ",%x", len
);
7517 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7519 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
7523 case PACKET_UNKNOWN
:
7528 internal_error (__FILE__
, __LINE__
,
7529 _("remote_insert_watchpoint: reached end of function"));
7534 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
7536 struct remote_state
*rs
= get_remote_state ();
7538 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
7540 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
7543 sprintf (rs
->buf
, "z%x,", packet
);
7544 p
= strchr (rs
->buf
, '\0');
7545 addr
= remote_address_masked (addr
);
7546 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7547 sprintf (p
, ",%x", len
);
7549 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7551 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
7554 case PACKET_UNKNOWN
:
7559 internal_error (__FILE__
, __LINE__
,
7560 _("remote_remove_watchpoint: reached end of function"));
7564 int remote_hw_watchpoint_limit
= -1;
7565 int remote_hw_breakpoint_limit
= -1;
7568 remote_check_watch_resources (int type
, int cnt
, int ot
)
7570 if (type
== bp_hardware_breakpoint
)
7572 if (remote_hw_breakpoint_limit
== 0)
7574 else if (remote_hw_breakpoint_limit
< 0)
7576 else if (cnt
<= remote_hw_breakpoint_limit
)
7581 if (remote_hw_watchpoint_limit
== 0)
7583 else if (remote_hw_watchpoint_limit
< 0)
7587 else if (cnt
<= remote_hw_watchpoint_limit
)
7594 remote_stopped_by_watchpoint (void)
7596 return remote_stopped_by_watchpoint_p
;
7600 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
7604 if (remote_stopped_by_watchpoint ())
7606 *addr_p
= remote_watch_data_address
;
7615 remote_insert_hw_breakpoint (struct gdbarch
*gdbarch
,
7616 struct bp_target_info
*bp_tgt
)
7619 struct remote_state
*rs
;
7622 /* The length field should be set to the size of a breakpoint
7623 instruction, even though we aren't inserting one ourselves. */
7625 gdbarch_remote_breakpoint_from_pc
7626 (gdbarch
, &bp_tgt
->placed_address
, &bp_tgt
->placed_size
);
7628 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7631 rs
= get_remote_state ();
7638 addr
= remote_address_masked (bp_tgt
->placed_address
);
7639 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7640 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7643 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7645 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7648 case PACKET_UNKNOWN
:
7653 internal_error (__FILE__
, __LINE__
,
7654 _("remote_insert_hw_breakpoint: reached end of function"));
7659 remote_remove_hw_breakpoint (struct gdbarch
*gdbarch
,
7660 struct bp_target_info
*bp_tgt
)
7663 struct remote_state
*rs
= get_remote_state ();
7666 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7673 addr
= remote_address_masked (bp_tgt
->placed_address
);
7674 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7675 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7678 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7680 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7683 case PACKET_UNKNOWN
:
7688 internal_error (__FILE__
, __LINE__
,
7689 _("remote_remove_hw_breakpoint: reached end of function"));
7692 /* Table used by the crc32 function to calcuate the checksum. */
7694 static unsigned long crc32_table
[256] =
7697 static unsigned long
7698 crc32 (const unsigned char *buf
, int len
, unsigned int crc
)
7700 if (!crc32_table
[1])
7702 /* Initialize the CRC table and the decoding table. */
7706 for (i
= 0; i
< 256; i
++)
7708 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
7709 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
7716 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
7722 /* Verify memory using the "qCRC:" request. */
7725 remote_verify_memory (struct target_ops
*ops
,
7726 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
7728 struct remote_state
*rs
= get_remote_state ();
7729 unsigned long host_crc
, target_crc
;
7732 /* FIXME: assumes lma can fit into long. */
7733 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
7734 (long) lma
, (long) size
);
7737 /* Be clever; compute the host_crc before waiting for target
7739 host_crc
= crc32 (data
, size
, 0xffffffff);
7741 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7742 if (rs
->buf
[0] == 'E')
7745 if (rs
->buf
[0] != 'C')
7746 error (_("remote target does not support this operation"));
7748 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
7749 target_crc
= target_crc
* 16 + fromhex (*tmp
);
7751 return (host_crc
== target_crc
);
7754 /* compare-sections command
7756 With no arguments, compares each loadable section in the exec bfd
7757 with the same memory range on the target, and reports mismatches.
7758 Useful for verifying the image on the target against the exec file. */
7761 compare_sections_command (char *args
, int from_tty
)
7764 struct cleanup
*old_chain
;
7766 const char *sectname
;
7774 error (_("command cannot be used without an exec file"));
7776 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
7778 if (!(s
->flags
& SEC_LOAD
))
7779 continue; /* skip non-loadable section */
7781 size
= bfd_get_section_size (s
);
7783 continue; /* skip zero-length section */
7785 sectname
= bfd_get_section_name (exec_bfd
, s
);
7786 if (args
&& strcmp (args
, sectname
) != 0)
7787 continue; /* not the section selected by user */
7789 matched
= 1; /* do this section */
7792 sectdata
= xmalloc (size
);
7793 old_chain
= make_cleanup (xfree
, sectdata
);
7794 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
7796 res
= target_verify_memory (sectdata
, lma
, size
);
7799 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
7800 paddress (target_gdbarch
, lma
),
7801 paddress (target_gdbarch
, lma
+ size
));
7803 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
7804 paddress (target_gdbarch
, lma
),
7805 paddress (target_gdbarch
, lma
+ size
));
7807 printf_filtered ("matched.\n");
7810 printf_filtered ("MIS-MATCHED!\n");
7814 do_cleanups (old_chain
);
7817 warning (_("One or more sections of the remote executable does not match\n\
7818 the loaded file\n"));
7819 if (args
&& !matched
)
7820 printf_filtered (_("No loaded section named '%s'.\n"), args
);
7823 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
7824 into remote target. The number of bytes written to the remote
7825 target is returned, or -1 for error. */
7828 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
7829 const char *annex
, const gdb_byte
*writebuf
,
7830 ULONGEST offset
, LONGEST len
,
7831 struct packet_config
*packet
)
7835 struct remote_state
*rs
= get_remote_state ();
7836 int max_size
= get_memory_write_packet_size ();
7838 if (packet
->support
== PACKET_DISABLE
)
7841 /* Insert header. */
7842 i
= snprintf (rs
->buf
, max_size
,
7843 "qXfer:%s:write:%s:%s:",
7844 object_name
, annex
? annex
: "",
7845 phex_nz (offset
, sizeof offset
));
7846 max_size
-= (i
+ 1);
7848 /* Escape as much data as fits into rs->buf. */
7849 buf_len
= remote_escape_output
7850 (writebuf
, len
, (rs
->buf
+ i
), &max_size
, max_size
);
7852 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
7853 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
7854 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7857 unpack_varlen_hex (rs
->buf
, &n
);
7861 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
7862 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
7863 number of bytes read is returned, or 0 for EOF, or -1 for error.
7864 The number of bytes read may be less than LEN without indicating an
7865 EOF. PACKET is checked and updated to indicate whether the remote
7866 target supports this object. */
7869 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
7871 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
7872 struct packet_config
*packet
)
7874 static char *finished_object
;
7875 static char *finished_annex
;
7876 static ULONGEST finished_offset
;
7878 struct remote_state
*rs
= get_remote_state ();
7879 LONGEST i
, n
, packet_len
;
7881 if (packet
->support
== PACKET_DISABLE
)
7884 /* Check whether we've cached an end-of-object packet that matches
7886 if (finished_object
)
7888 if (strcmp (object_name
, finished_object
) == 0
7889 && strcmp (annex
? annex
: "", finished_annex
) == 0
7890 && offset
== finished_offset
)
7893 /* Otherwise, we're now reading something different. Discard
7895 xfree (finished_object
);
7896 xfree (finished_annex
);
7897 finished_object
= NULL
;
7898 finished_annex
= NULL
;
7901 /* Request only enough to fit in a single packet. The actual data
7902 may not, since we don't know how much of it will need to be escaped;
7903 the target is free to respond with slightly less data. We subtract
7904 five to account for the response type and the protocol frame. */
7905 n
= min (get_remote_packet_size () - 5, len
);
7906 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
7907 object_name
, annex
? annex
: "",
7908 phex_nz (offset
, sizeof offset
),
7909 phex_nz (n
, sizeof n
));
7910 i
= putpkt (rs
->buf
);
7915 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
7916 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7919 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
7920 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
7922 /* 'm' means there is (or at least might be) more data after this
7923 batch. That does not make sense unless there's at least one byte
7924 of data in this reply. */
7925 if (rs
->buf
[0] == 'm' && packet_len
== 1)
7926 error (_("Remote qXfer reply contained no data."));
7928 /* Got some data. */
7929 i
= remote_unescape_input (rs
->buf
+ 1, packet_len
- 1, readbuf
, n
);
7931 /* 'l' is an EOF marker, possibly including a final block of data,
7932 or possibly empty. If we have the final block of a non-empty
7933 object, record this fact to bypass a subsequent partial read. */
7934 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
7936 finished_object
= xstrdup (object_name
);
7937 finished_annex
= xstrdup (annex
? annex
: "");
7938 finished_offset
= offset
+ i
;
7945 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
7946 const char *annex
, gdb_byte
*readbuf
,
7947 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
7949 struct remote_state
*rs
;
7954 set_general_thread (inferior_ptid
);
7956 rs
= get_remote_state ();
7958 /* Handle memory using the standard memory routines. */
7959 if (object
== TARGET_OBJECT_MEMORY
)
7965 /* If the remote target is connected but not running, we should
7966 pass this request down to a lower stratum (e.g. the executable
7968 if (!target_has_execution
)
7971 if (writebuf
!= NULL
)
7972 xfered
= remote_write_bytes (offset
, writebuf
, len
);
7974 xfered
= remote_read_bytes (offset
, readbuf
, len
);
7978 else if (xfered
== 0 && errno
== 0)
7984 /* Handle SPU memory using qxfer packets. */
7985 if (object
== TARGET_OBJECT_SPU
)
7988 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
7989 &remote_protocol_packets
7990 [PACKET_qXfer_spu_read
]);
7992 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
7993 &remote_protocol_packets
7994 [PACKET_qXfer_spu_write
]);
7997 /* Handle extra signal info using qxfer packets. */
7998 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
8001 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
8002 &remote_protocol_packets
8003 [PACKET_qXfer_siginfo_read
]);
8005 return remote_write_qxfer (ops
, "siginfo", annex
, writebuf
, offset
, len
,
8006 &remote_protocol_packets
8007 [PACKET_qXfer_siginfo_write
]);
8010 /* Only handle flash writes. */
8011 if (writebuf
!= NULL
)
8017 case TARGET_OBJECT_FLASH
:
8018 xfered
= remote_flash_write (ops
, offset
, len
, writebuf
);
8022 else if (xfered
== 0 && errno
== 0)
8032 /* Map pre-existing objects onto letters. DO NOT do this for new
8033 objects!!! Instead specify new query packets. */
8036 case TARGET_OBJECT_AVR
:
8040 case TARGET_OBJECT_AUXV
:
8041 gdb_assert (annex
== NULL
);
8042 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
8043 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
8045 case TARGET_OBJECT_AVAILABLE_FEATURES
:
8046 return remote_read_qxfer
8047 (ops
, "features", annex
, readbuf
, offset
, len
,
8048 &remote_protocol_packets
[PACKET_qXfer_features
]);
8050 case TARGET_OBJECT_LIBRARIES
:
8051 return remote_read_qxfer
8052 (ops
, "libraries", annex
, readbuf
, offset
, len
,
8053 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
8055 case TARGET_OBJECT_MEMORY_MAP
:
8056 gdb_assert (annex
== NULL
);
8057 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
8058 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
8060 case TARGET_OBJECT_OSDATA
:
8061 /* Should only get here if we're connected. */
8062 gdb_assert (remote_desc
);
8063 return remote_read_qxfer
8064 (ops
, "osdata", annex
, readbuf
, offset
, len
,
8065 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
8067 case TARGET_OBJECT_THREADS
:
8068 gdb_assert (annex
== NULL
);
8069 return remote_read_qxfer (ops
, "threads", annex
, readbuf
, offset
, len
,
8070 &remote_protocol_packets
[PACKET_qXfer_threads
]);
8076 /* Note: a zero OFFSET and LEN can be used to query the minimum
8078 if (offset
== 0 && len
== 0)
8079 return (get_remote_packet_size ());
8080 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
8081 large enough let the caller deal with it. */
8082 if (len
< get_remote_packet_size ())
8084 len
= get_remote_packet_size ();
8086 /* Except for querying the minimum buffer size, target must be open. */
8088 error (_("remote query is only available after target open"));
8090 gdb_assert (annex
!= NULL
);
8091 gdb_assert (readbuf
!= NULL
);
8097 /* We used one buffer char for the remote protocol q command and
8098 another for the query type. As the remote protocol encapsulation
8099 uses 4 chars plus one extra in case we are debugging
8100 (remote_debug), we have PBUFZIZ - 7 left to pack the query
8103 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
8105 /* Bad caller may have sent forbidden characters. */
8106 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
8111 gdb_assert (annex
[i
] == '\0');
8113 i
= putpkt (rs
->buf
);
8117 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8118 strcpy ((char *) readbuf
, rs
->buf
);
8120 return strlen ((char *) readbuf
);
8124 remote_search_memory (struct target_ops
* ops
,
8125 CORE_ADDR start_addr
, ULONGEST search_space_len
,
8126 const gdb_byte
*pattern
, ULONGEST pattern_len
,
8127 CORE_ADDR
*found_addrp
)
8129 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
8130 struct remote_state
*rs
= get_remote_state ();
8131 int max_size
= get_memory_write_packet_size ();
8132 struct packet_config
*packet
=
8133 &remote_protocol_packets
[PACKET_qSearch_memory
];
8134 /* number of packet bytes used to encode the pattern,
8135 this could be more than PATTERN_LEN due to escape characters */
8136 int escaped_pattern_len
;
8137 /* amount of pattern that was encodable in the packet */
8138 int used_pattern_len
;
8141 ULONGEST found_addr
;
8143 /* Don't go to the target if we don't have to.
8144 This is done before checking packet->support to avoid the possibility that
8145 a success for this edge case means the facility works in general. */
8146 if (pattern_len
> search_space_len
)
8148 if (pattern_len
== 0)
8150 *found_addrp
= start_addr
;
8154 /* If we already know the packet isn't supported, fall back to the simple
8155 way of searching memory. */
8157 if (packet
->support
== PACKET_DISABLE
)
8159 /* Target doesn't provided special support, fall back and use the
8160 standard support (copy memory and do the search here). */
8161 return simple_search_memory (ops
, start_addr
, search_space_len
,
8162 pattern
, pattern_len
, found_addrp
);
8165 /* Insert header. */
8166 i
= snprintf (rs
->buf
, max_size
,
8167 "qSearch:memory:%s;%s;",
8168 phex_nz (start_addr
, addr_size
),
8169 phex_nz (search_space_len
, sizeof (search_space_len
)));
8170 max_size
-= (i
+ 1);
8172 /* Escape as much data as fits into rs->buf. */
8173 escaped_pattern_len
=
8174 remote_escape_output (pattern
, pattern_len
, (rs
->buf
+ i
),
8175 &used_pattern_len
, max_size
);
8177 /* Bail if the pattern is too large. */
8178 if (used_pattern_len
!= pattern_len
)
8179 error ("Pattern is too large to transmit to remote target.");
8181 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
8182 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
8183 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
8185 /* The request may not have worked because the command is not
8186 supported. If so, fall back to the simple way. */
8187 if (packet
->support
== PACKET_DISABLE
)
8189 return simple_search_memory (ops
, start_addr
, search_space_len
,
8190 pattern
, pattern_len
, found_addrp
);
8195 if (rs
->buf
[0] == '0')
8197 else if (rs
->buf
[0] == '1')
8200 if (rs
->buf
[1] != ',')
8201 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
8202 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
8203 *found_addrp
= found_addr
;
8206 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
8212 remote_rcmd (char *command
,
8213 struct ui_file
*outbuf
)
8215 struct remote_state
*rs
= get_remote_state ();
8219 error (_("remote rcmd is only available after target open"));
8221 /* Send a NULL command across as an empty command. */
8222 if (command
== NULL
)
8225 /* The query prefix. */
8226 strcpy (rs
->buf
, "qRcmd,");
8227 p
= strchr (rs
->buf
, '\0');
8229 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/) > get_remote_packet_size ())
8230 error (_("\"monitor\" command ``%s'' is too long."), command
);
8232 /* Encode the actual command. */
8233 bin2hex ((gdb_byte
*) command
, p
, 0);
8235 if (putpkt (rs
->buf
) < 0)
8236 error (_("Communication problem with target."));
8238 /* get/display the response */
8243 /* XXX - see also remote_get_noisy_reply(). */
8245 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8248 error (_("Target does not support this command."));
8249 if (buf
[0] == 'O' && buf
[1] != 'K')
8251 remote_console_output (buf
+ 1); /* 'O' message from stub. */
8254 if (strcmp (buf
, "OK") == 0)
8256 if (strlen (buf
) == 3 && buf
[0] == 'E'
8257 && isdigit (buf
[1]) && isdigit (buf
[2]))
8259 error (_("Protocol error with Rcmd"));
8261 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
8263 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
8265 fputc_unfiltered (c
, outbuf
);
8271 static VEC(mem_region_s
) *
8272 remote_memory_map (struct target_ops
*ops
)
8274 VEC(mem_region_s
) *result
= NULL
;
8275 char *text
= target_read_stralloc (¤t_target
,
8276 TARGET_OBJECT_MEMORY_MAP
, NULL
);
8280 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
8282 result
= parse_memory_map (text
);
8283 do_cleanups (back_to
);
8290 packet_command (char *args
, int from_tty
)
8292 struct remote_state
*rs
= get_remote_state ();
8295 error (_("command can only be used with remote target"));
8298 error (_("remote-packet command requires packet text as argument"));
8300 puts_filtered ("sending: ");
8301 print_packet (args
);
8302 puts_filtered ("\n");
8305 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8306 puts_filtered ("received: ");
8307 print_packet (rs
->buf
);
8308 puts_filtered ("\n");
8312 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
8314 static void display_thread_info (struct gdb_ext_thread_info
*info
);
8316 static void threadset_test_cmd (char *cmd
, int tty
);
8318 static void threadalive_test (char *cmd
, int tty
);
8320 static void threadlist_test_cmd (char *cmd
, int tty
);
8322 int get_and_display_threadinfo (threadref
*ref
);
8324 static void threadinfo_test_cmd (char *cmd
, int tty
);
8326 static int thread_display_step (threadref
*ref
, void *context
);
8328 static void threadlist_update_test_cmd (char *cmd
, int tty
);
8330 static void init_remote_threadtests (void);
8332 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
8335 threadset_test_cmd (char *cmd
, int tty
)
8337 int sample_thread
= SAMPLE_THREAD
;
8339 printf_filtered (_("Remote threadset test\n"));
8340 set_general_thread (sample_thread
);
8345 threadalive_test (char *cmd
, int tty
)
8347 int sample_thread
= SAMPLE_THREAD
;
8348 int pid
= ptid_get_pid (inferior_ptid
);
8349 ptid_t ptid
= ptid_build (pid
, 0, sample_thread
);
8351 if (remote_thread_alive (ptid
))
8352 printf_filtered ("PASS: Thread alive test\n");
8354 printf_filtered ("FAIL: Thread alive test\n");
8357 void output_threadid (char *title
, threadref
*ref
);
8360 output_threadid (char *title
, threadref
*ref
)
8364 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
8366 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
8370 threadlist_test_cmd (char *cmd
, int tty
)
8373 threadref nextthread
;
8374 int done
, result_count
;
8375 threadref threadlist
[3];
8377 printf_filtered ("Remote Threadlist test\n");
8378 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
8379 &result_count
, &threadlist
[0]))
8380 printf_filtered ("FAIL: threadlist test\n");
8383 threadref
*scan
= threadlist
;
8384 threadref
*limit
= scan
+ result_count
;
8386 while (scan
< limit
)
8387 output_threadid (" thread ", scan
++);
8392 display_thread_info (struct gdb_ext_thread_info
*info
)
8394 output_threadid ("Threadid: ", &info
->threadid
);
8395 printf_filtered ("Name: %s\n ", info
->shortname
);
8396 printf_filtered ("State: %s\n", info
->display
);
8397 printf_filtered ("other: %s\n\n", info
->more_display
);
8401 get_and_display_threadinfo (threadref
*ref
)
8405 struct gdb_ext_thread_info threadinfo
;
8407 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
8408 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
8409 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
8410 display_thread_info (&threadinfo
);
8415 threadinfo_test_cmd (char *cmd
, int tty
)
8417 int athread
= SAMPLE_THREAD
;
8421 int_to_threadref (&thread
, athread
);
8422 printf_filtered ("Remote Threadinfo test\n");
8423 if (!get_and_display_threadinfo (&thread
))
8424 printf_filtered ("FAIL cannot get thread info\n");
8428 thread_display_step (threadref
*ref
, void *context
)
8430 /* output_threadid(" threadstep ",ref); *//* simple test */
8431 return get_and_display_threadinfo (ref
);
8435 threadlist_update_test_cmd (char *cmd
, int tty
)
8437 printf_filtered ("Remote Threadlist update test\n");
8438 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
8442 init_remote_threadtests (void)
8444 add_com ("tlist", class_obscure
, threadlist_test_cmd
, _("\
8445 Fetch and print the remote list of thread identifiers, one pkt only"));
8446 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
8447 _("Fetch and display info about one thread"));
8448 add_com ("tset", class_obscure
, threadset_test_cmd
,
8449 _("Test setting to a different thread"));
8450 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
8451 _("Iterate through updating all remote thread info"));
8452 add_com ("talive", class_obscure
, threadalive_test
,
8453 _(" Remote thread alive test "));
8458 /* Convert a thread ID to a string. Returns the string in a static
8462 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
8464 static char buf
[64];
8465 struct remote_state
*rs
= get_remote_state ();
8467 if (ptid_is_pid (ptid
))
8469 /* Printing an inferior target id. */
8471 /* When multi-process extensions are off, there's no way in the
8472 remote protocol to know the remote process id, if there's any
8473 at all. There's one exception --- when we're connected with
8474 target extended-remote, and we manually attached to a process
8475 with "attach PID". We don't record anywhere a flag that
8476 allows us to distinguish that case from the case of
8477 connecting with extended-remote and the stub already being
8478 attached to a process, and reporting yes to qAttached, hence
8479 no smart special casing here. */
8480 if (!remote_multi_process_p (rs
))
8482 xsnprintf (buf
, sizeof buf
, "Remote target");
8486 return normal_pid_to_str (ptid
);
8490 if (ptid_equal (magic_null_ptid
, ptid
))
8491 xsnprintf (buf
, sizeof buf
, "Thread <main>");
8492 else if (remote_multi_process_p (rs
))
8493 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
8494 ptid_get_pid (ptid
), ptid_get_tid (ptid
));
8496 xsnprintf (buf
, sizeof buf
, "Thread %ld",
8497 ptid_get_tid (ptid
));
8502 /* Get the address of the thread local variable in OBJFILE which is
8503 stored at OFFSET within the thread local storage for thread PTID. */
8506 remote_get_thread_local_address (struct target_ops
*ops
,
8507 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
8509 if (remote_protocol_packets
[PACKET_qGetTLSAddr
].support
!= PACKET_DISABLE
)
8511 struct remote_state
*rs
= get_remote_state ();
8513 char *endp
= rs
->buf
+ get_remote_packet_size ();
8514 enum packet_result result
;
8516 strcpy (p
, "qGetTLSAddr:");
8518 p
= write_ptid (p
, endp
, ptid
);
8520 p
+= hexnumstr (p
, offset
);
8522 p
+= hexnumstr (p
, lm
);
8526 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8527 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
8528 if (result
== PACKET_OK
)
8532 unpack_varlen_hex (rs
->buf
, &result
);
8535 else if (result
== PACKET_UNKNOWN
)
8536 throw_error (TLS_GENERIC_ERROR
,
8537 _("Remote target doesn't support qGetTLSAddr packet"));
8539 throw_error (TLS_GENERIC_ERROR
,
8540 _("Remote target failed to process qGetTLSAddr request"));
8543 throw_error (TLS_GENERIC_ERROR
,
8544 _("TLS not supported or disabled on this target"));
8549 /* Provide thread local base, i.e. Thread Information Block address.
8550 Returns 1 if ptid is found and thread_local_base is non zero. */
8553 remote_get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
8555 if (remote_protocol_packets
[PACKET_qGetTIBAddr
].support
!= PACKET_DISABLE
)
8557 struct remote_state
*rs
= get_remote_state ();
8559 char *endp
= rs
->buf
+ get_remote_packet_size ();
8560 enum packet_result result
;
8562 strcpy (p
, "qGetTIBAddr:");
8564 p
= write_ptid (p
, endp
, ptid
);
8568 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8569 result
= packet_ok (rs
->buf
,
8570 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
8571 if (result
== PACKET_OK
)
8575 unpack_varlen_hex (rs
->buf
, &result
);
8577 *addr
= (CORE_ADDR
) result
;
8580 else if (result
== PACKET_UNKNOWN
)
8581 error (_("Remote target doesn't support qGetTIBAddr packet"));
8583 error (_("Remote target failed to process qGetTIBAddr request"));
8586 error (_("qGetTIBAddr not supported or disabled on this target"));
8591 /* Support for inferring a target description based on the current
8592 architecture and the size of a 'g' packet. While the 'g' packet
8593 can have any size (since optional registers can be left off the
8594 end), some sizes are easily recognizable given knowledge of the
8595 approximate architecture. */
8597 struct remote_g_packet_guess
8600 const struct target_desc
*tdesc
;
8602 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
8603 DEF_VEC_O(remote_g_packet_guess_s
);
8605 struct remote_g_packet_data
8607 VEC(remote_g_packet_guess_s
) *guesses
;
8610 static struct gdbarch_data
*remote_g_packet_data_handle
;
8613 remote_g_packet_data_init (struct obstack
*obstack
)
8615 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
8619 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
8620 const struct target_desc
*tdesc
)
8622 struct remote_g_packet_data
*data
8623 = gdbarch_data (gdbarch
, remote_g_packet_data_handle
);
8624 struct remote_g_packet_guess new_guess
, *guess
;
8627 gdb_assert (tdesc
!= NULL
);
8630 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
8632 if (guess
->bytes
== bytes
)
8633 internal_error (__FILE__
, __LINE__
,
8634 "Duplicate g packet description added for size %d",
8637 new_guess
.bytes
= bytes
;
8638 new_guess
.tdesc
= tdesc
;
8639 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
8642 /* Return 1 if remote_read_description would do anything on this target
8643 and architecture, 0 otherwise. */
8646 remote_read_description_p (struct target_ops
*target
)
8648 struct remote_g_packet_data
*data
8649 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
8651 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
8657 static const struct target_desc
*
8658 remote_read_description (struct target_ops
*target
)
8660 struct remote_g_packet_data
*data
8661 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
8663 /* Do not try this during initial connection, when we do not know
8664 whether there is a running but stopped thread. */
8665 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
8668 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
8670 struct remote_g_packet_guess
*guess
;
8672 int bytes
= send_g_packet ();
8675 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
8677 if (guess
->bytes
== bytes
)
8678 return guess
->tdesc
;
8680 /* We discard the g packet. A minor optimization would be to
8681 hold on to it, and fill the register cache once we have selected
8682 an architecture, but it's too tricky to do safely. */
8688 /* Remote file transfer support. This is host-initiated I/O, not
8689 target-initiated; for target-initiated, see remote-fileio.c. */
8691 /* If *LEFT is at least the length of STRING, copy STRING to
8692 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8693 decrease *LEFT. Otherwise raise an error. */
8696 remote_buffer_add_string (char **buffer
, int *left
, char *string
)
8698 int len
= strlen (string
);
8701 error (_("Packet too long for target."));
8703 memcpy (*buffer
, string
, len
);
8707 /* NUL-terminate the buffer as a convenience, if there is
8713 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
8714 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8715 decrease *LEFT. Otherwise raise an error. */
8718 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
8721 if (2 * len
> *left
)
8722 error (_("Packet too long for target."));
8724 bin2hex (bytes
, *buffer
, len
);
8728 /* NUL-terminate the buffer as a convenience, if there is
8734 /* If *LEFT is large enough, convert VALUE to hex and add it to
8735 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8736 decrease *LEFT. Otherwise raise an error. */
8739 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
8741 int len
= hexnumlen (value
);
8744 error (_("Packet too long for target."));
8746 hexnumstr (*buffer
, value
);
8750 /* NUL-terminate the buffer as a convenience, if there is
8756 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
8757 value, *REMOTE_ERRNO to the remote error number or zero if none
8758 was included, and *ATTACHMENT to point to the start of the annex
8759 if any. The length of the packet isn't needed here; there may
8760 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
8762 Return 0 if the packet could be parsed, -1 if it could not. If
8763 -1 is returned, the other variables may not be initialized. */
8766 remote_hostio_parse_result (char *buffer
, int *retcode
,
8767 int *remote_errno
, char **attachment
)
8774 if (buffer
[0] != 'F')
8778 *retcode
= strtol (&buffer
[1], &p
, 16);
8779 if (errno
!= 0 || p
== &buffer
[1])
8782 /* Check for ",errno". */
8786 *remote_errno
= strtol (p
+ 1, &p2
, 16);
8787 if (errno
!= 0 || p
+ 1 == p2
)
8792 /* Check for ";attachment". If there is no attachment, the
8793 packet should end here. */
8796 *attachment
= p
+ 1;
8799 else if (*p
== '\0')
8805 /* Send a prepared I/O packet to the target and read its response.
8806 The prepared packet is in the global RS->BUF before this function
8807 is called, and the answer is there when we return.
8809 COMMAND_BYTES is the length of the request to send, which may include
8810 binary data. WHICH_PACKET is the packet configuration to check
8811 before attempting a packet. If an error occurs, *REMOTE_ERRNO
8812 is set to the error number and -1 is returned. Otherwise the value
8813 returned by the function is returned.
8815 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
8816 attachment is expected; an error will be reported if there's a
8817 mismatch. If one is found, *ATTACHMENT will be set to point into
8818 the packet buffer and *ATTACHMENT_LEN will be set to the
8819 attachment's length. */
8822 remote_hostio_send_command (int command_bytes
, int which_packet
,
8823 int *remote_errno
, char **attachment
,
8824 int *attachment_len
)
8826 struct remote_state
*rs
= get_remote_state ();
8827 int ret
, bytes_read
;
8828 char *attachment_tmp
;
8831 || remote_protocol_packets
[which_packet
].support
== PACKET_DISABLE
)
8833 *remote_errno
= FILEIO_ENOSYS
;
8837 putpkt_binary (rs
->buf
, command_bytes
);
8838 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
8840 /* If it timed out, something is wrong. Don't try to parse the
8844 *remote_errno
= FILEIO_EINVAL
;
8848 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
8851 *remote_errno
= FILEIO_EINVAL
;
8853 case PACKET_UNKNOWN
:
8854 *remote_errno
= FILEIO_ENOSYS
;
8860 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
8863 *remote_errno
= FILEIO_EINVAL
;
8867 /* Make sure we saw an attachment if and only if we expected one. */
8868 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
8869 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
8871 *remote_errno
= FILEIO_EINVAL
;
8875 /* If an attachment was found, it must point into the packet buffer;
8876 work out how many bytes there were. */
8877 if (attachment_tmp
!= NULL
)
8879 *attachment
= attachment_tmp
;
8880 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
8886 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
8887 remote file descriptor, or -1 if an error occurs (and set
8891 remote_hostio_open (const char *filename
, int flags
, int mode
,
8894 struct remote_state
*rs
= get_remote_state ();
8896 int left
= get_remote_packet_size () - 1;
8898 remote_buffer_add_string (&p
, &left
, "vFile:open:");
8900 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
8902 remote_buffer_add_string (&p
, &left
, ",");
8904 remote_buffer_add_int (&p
, &left
, flags
);
8905 remote_buffer_add_string (&p
, &left
, ",");
8907 remote_buffer_add_int (&p
, &left
, mode
);
8909 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
8910 remote_errno
, NULL
, NULL
);
8913 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
8914 Return the number of bytes written, or -1 if an error occurs (and
8915 set *REMOTE_ERRNO). */
8918 remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
8919 ULONGEST offset
, int *remote_errno
)
8921 struct remote_state
*rs
= get_remote_state ();
8923 int left
= get_remote_packet_size ();
8926 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
8928 remote_buffer_add_int (&p
, &left
, fd
);
8929 remote_buffer_add_string (&p
, &left
, ",");
8931 remote_buffer_add_int (&p
, &left
, offset
);
8932 remote_buffer_add_string (&p
, &left
, ",");
8934 p
+= remote_escape_output (write_buf
, len
, p
, &out_len
,
8935 get_remote_packet_size () - (p
- rs
->buf
));
8937 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
8938 remote_errno
, NULL
, NULL
);
8941 /* Read up to LEN bytes FD on the remote target into READ_BUF
8942 Return the number of bytes read, or -1 if an error occurs (and
8943 set *REMOTE_ERRNO). */
8946 remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
8947 ULONGEST offset
, int *remote_errno
)
8949 struct remote_state
*rs
= get_remote_state ();
8952 int left
= get_remote_packet_size ();
8953 int ret
, attachment_len
;
8956 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
8958 remote_buffer_add_int (&p
, &left
, fd
);
8959 remote_buffer_add_string (&p
, &left
, ",");
8961 remote_buffer_add_int (&p
, &left
, len
);
8962 remote_buffer_add_string (&p
, &left
, ",");
8964 remote_buffer_add_int (&p
, &left
, offset
);
8966 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
8967 remote_errno
, &attachment
,
8973 read_len
= remote_unescape_input (attachment
, attachment_len
,
8975 if (read_len
!= ret
)
8976 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
8981 /* Close FD on the remote target. Return 0, or -1 if an error occurs
8982 (and set *REMOTE_ERRNO). */
8985 remote_hostio_close (int fd
, int *remote_errno
)
8987 struct remote_state
*rs
= get_remote_state ();
8989 int left
= get_remote_packet_size () - 1;
8991 remote_buffer_add_string (&p
, &left
, "vFile:close:");
8993 remote_buffer_add_int (&p
, &left
, fd
);
8995 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
8996 remote_errno
, NULL
, NULL
);
8999 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
9000 occurs (and set *REMOTE_ERRNO). */
9003 remote_hostio_unlink (const char *filename
, int *remote_errno
)
9005 struct remote_state
*rs
= get_remote_state ();
9007 int left
= get_remote_packet_size () - 1;
9009 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
9011 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
9014 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
9015 remote_errno
, NULL
, NULL
);
9019 remote_fileio_errno_to_host (int errnum
)
9043 case FILEIO_ENOTDIR
:
9063 case FILEIO_ENAMETOOLONG
:
9064 return ENAMETOOLONG
;
9070 remote_hostio_error (int errnum
)
9072 int host_error
= remote_fileio_errno_to_host (errnum
);
9074 if (host_error
== -1)
9075 error (_("Unknown remote I/O error %d"), errnum
);
9077 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
9081 remote_hostio_close_cleanup (void *opaque
)
9083 int fd
= *(int *) opaque
;
9086 remote_hostio_close (fd
, &remote_errno
);
9091 remote_bfd_iovec_open (struct bfd
*abfd
, void *open_closure
)
9093 const char *filename
= bfd_get_filename (abfd
);
9094 int fd
, remote_errno
;
9097 gdb_assert (remote_filename_p (filename
));
9099 fd
= remote_hostio_open (filename
+ 7, FILEIO_O_RDONLY
, 0, &remote_errno
);
9102 errno
= remote_fileio_errno_to_host (remote_errno
);
9103 bfd_set_error (bfd_error_system_call
);
9107 stream
= xmalloc (sizeof (int));
9113 remote_bfd_iovec_close (struct bfd
*abfd
, void *stream
)
9115 int fd
= *(int *)stream
;
9120 /* Ignore errors on close; these may happen if the remote
9121 connection was already torn down. */
9122 remote_hostio_close (fd
, &remote_errno
);
9128 remote_bfd_iovec_pread (struct bfd
*abfd
, void *stream
, void *buf
,
9129 file_ptr nbytes
, file_ptr offset
)
9131 int fd
= *(int *)stream
;
9133 file_ptr pos
, bytes
;
9136 while (nbytes
> pos
)
9138 bytes
= remote_hostio_pread (fd
, (char *)buf
+ pos
, nbytes
- pos
,
9139 offset
+ pos
, &remote_errno
);
9141 /* Success, but no bytes, means end-of-file. */
9145 errno
= remote_fileio_errno_to_host (remote_errno
);
9146 bfd_set_error (bfd_error_system_call
);
9157 remote_bfd_iovec_stat (struct bfd
*abfd
, void *stream
, struct stat
*sb
)
9159 /* FIXME: We should probably implement remote_hostio_stat. */
9160 sb
->st_size
= INT_MAX
;
9165 remote_filename_p (const char *filename
)
9167 return strncmp (filename
, "remote:", 7) == 0;
9171 remote_bfd_open (const char *remote_file
, const char *target
)
9173 return bfd_openr_iovec (remote_file
, target
,
9174 remote_bfd_iovec_open
, NULL
,
9175 remote_bfd_iovec_pread
,
9176 remote_bfd_iovec_close
,
9177 remote_bfd_iovec_stat
);
9181 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
9183 struct cleanup
*back_to
, *close_cleanup
;
9184 int retcode
, fd
, remote_errno
, bytes
, io_size
;
9187 int bytes_in_buffer
;
9192 error (_("command can only be used with remote target"));
9194 file
= fopen (local_file
, "rb");
9196 perror_with_name (local_file
);
9197 back_to
= make_cleanup_fclose (file
);
9199 fd
= remote_hostio_open (remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
9201 0700, &remote_errno
);
9203 remote_hostio_error (remote_errno
);
9205 /* Send up to this many bytes at once. They won't all fit in the
9206 remote packet limit, so we'll transfer slightly fewer. */
9207 io_size
= get_remote_packet_size ();
9208 buffer
= xmalloc (io_size
);
9209 make_cleanup (xfree
, buffer
);
9211 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
9213 bytes_in_buffer
= 0;
9216 while (bytes_in_buffer
|| !saw_eof
)
9220 bytes
= fread (buffer
+ bytes_in_buffer
, 1, io_size
- bytes_in_buffer
,
9225 error (_("Error reading %s."), local_file
);
9228 /* EOF. Unless there is something still in the
9229 buffer from the last iteration, we are done. */
9231 if (bytes_in_buffer
== 0)
9239 bytes
+= bytes_in_buffer
;
9240 bytes_in_buffer
= 0;
9242 retcode
= remote_hostio_pwrite (fd
, buffer
, bytes
, offset
, &remote_errno
);
9245 remote_hostio_error (remote_errno
);
9246 else if (retcode
== 0)
9247 error (_("Remote write of %d bytes returned 0!"), bytes
);
9248 else if (retcode
< bytes
)
9250 /* Short write. Save the rest of the read data for the next
9252 bytes_in_buffer
= bytes
- retcode
;
9253 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
9259 discard_cleanups (close_cleanup
);
9260 if (remote_hostio_close (fd
, &remote_errno
))
9261 remote_hostio_error (remote_errno
);
9264 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
9265 do_cleanups (back_to
);
9269 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
9271 struct cleanup
*back_to
, *close_cleanup
;
9272 int fd
, remote_errno
, bytes
, io_size
;
9278 error (_("command can only be used with remote target"));
9280 fd
= remote_hostio_open (remote_file
, FILEIO_O_RDONLY
, 0, &remote_errno
);
9282 remote_hostio_error (remote_errno
);
9284 file
= fopen (local_file
, "wb");
9286 perror_with_name (local_file
);
9287 back_to
= make_cleanup_fclose (file
);
9289 /* Send up to this many bytes at once. They won't all fit in the
9290 remote packet limit, so we'll transfer slightly fewer. */
9291 io_size
= get_remote_packet_size ();
9292 buffer
= xmalloc (io_size
);
9293 make_cleanup (xfree
, buffer
);
9295 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
9300 bytes
= remote_hostio_pread (fd
, buffer
, io_size
, offset
, &remote_errno
);
9302 /* Success, but no bytes, means end-of-file. */
9305 remote_hostio_error (remote_errno
);
9309 bytes
= fwrite (buffer
, 1, bytes
, file
);
9311 perror_with_name (local_file
);
9314 discard_cleanups (close_cleanup
);
9315 if (remote_hostio_close (fd
, &remote_errno
))
9316 remote_hostio_error (remote_errno
);
9319 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
9320 do_cleanups (back_to
);
9324 remote_file_delete (const char *remote_file
, int from_tty
)
9326 int retcode
, remote_errno
;
9329 error (_("command can only be used with remote target"));
9331 retcode
= remote_hostio_unlink (remote_file
, &remote_errno
);
9333 remote_hostio_error (remote_errno
);
9336 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
9340 remote_put_command (char *args
, int from_tty
)
9342 struct cleanup
*back_to
;
9346 error_no_arg (_("file to put"));
9348 argv
= gdb_buildargv (args
);
9349 back_to
= make_cleanup_freeargv (argv
);
9350 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
9351 error (_("Invalid parameters to remote put"));
9353 remote_file_put (argv
[0], argv
[1], from_tty
);
9355 do_cleanups (back_to
);
9359 remote_get_command (char *args
, int from_tty
)
9361 struct cleanup
*back_to
;
9365 error_no_arg (_("file to get"));
9367 argv
= gdb_buildargv (args
);
9368 back_to
= make_cleanup_freeargv (argv
);
9369 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
9370 error (_("Invalid parameters to remote get"));
9372 remote_file_get (argv
[0], argv
[1], from_tty
);
9374 do_cleanups (back_to
);
9378 remote_delete_command (char *args
, int from_tty
)
9380 struct cleanup
*back_to
;
9384 error_no_arg (_("file to delete"));
9386 argv
= gdb_buildargv (args
);
9387 back_to
= make_cleanup_freeargv (argv
);
9388 if (argv
[0] == NULL
|| argv
[1] != NULL
)
9389 error (_("Invalid parameters to remote delete"));
9391 remote_file_delete (argv
[0], from_tty
);
9393 do_cleanups (back_to
);
9397 remote_command (char *args
, int from_tty
)
9399 help_list (remote_cmdlist
, "remote ", -1, gdb_stdout
);
9403 remote_can_execute_reverse (void)
9405 if (remote_protocol_packets
[PACKET_bs
].support
== PACKET_ENABLE
9406 || remote_protocol_packets
[PACKET_bc
].support
== PACKET_ENABLE
)
9413 remote_supports_non_stop (void)
9419 remote_supports_multi_process (void)
9421 struct remote_state
*rs
= get_remote_state ();
9423 return remote_multi_process_p (rs
);
9427 remote_supports_cond_tracepoints (void)
9429 struct remote_state
*rs
= get_remote_state ();
9431 return rs
->cond_tracepoints
;
9435 remote_supports_fast_tracepoints (void)
9437 struct remote_state
*rs
= get_remote_state ();
9439 return rs
->fast_tracepoints
;
9443 remote_trace_init (void)
9446 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9447 if (strcmp (target_buf
, "OK") != 0)
9448 error (_("Target does not support this command."));
9451 static void free_actions_list (char **actions_list
);
9452 static void free_actions_list_cleanup_wrapper (void *);
9454 free_actions_list_cleanup_wrapper (void *al
)
9456 free_actions_list (al
);
9460 free_actions_list (char **actions_list
)
9464 if (actions_list
== 0)
9467 for (ndx
= 0; actions_list
[ndx
]; ndx
++)
9468 xfree (actions_list
[ndx
]);
9470 xfree (actions_list
);
9473 /* Recursive routine to walk through command list including loops, and
9474 download packets for each command. */
9477 remote_download_command_source (int num
, ULONGEST addr
,
9478 struct command_line
*cmds
)
9480 struct remote_state
*rs
= get_remote_state ();
9481 struct command_line
*cmd
;
9483 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
9485 QUIT
; /* allow user to bail out with ^C */
9486 strcpy (rs
->buf
, "QTDPsrc:");
9487 encode_source_string (num
, addr
, "cmd", cmd
->line
,
9488 rs
->buf
+ strlen (rs
->buf
),
9489 rs
->buf_size
- strlen (rs
->buf
));
9491 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9492 if (strcmp (target_buf
, "OK"))
9493 warning (_("Target does not support source download."));
9495 if (cmd
->control_type
== while_control
9496 || cmd
->control_type
== while_stepping_control
)
9498 remote_download_command_source (num
, addr
, *cmd
->body_list
);
9500 QUIT
; /* allow user to bail out with ^C */
9501 strcpy (rs
->buf
, "QTDPsrc:");
9502 encode_source_string (num
, addr
, "cmd", "end",
9503 rs
->buf
+ strlen (rs
->buf
),
9504 rs
->buf_size
- strlen (rs
->buf
));
9506 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9507 if (strcmp (target_buf
, "OK"))
9508 warning (_("Target does not support source download."));
9514 remote_download_tracepoint (struct breakpoint
*t
)
9516 struct bp_location
*loc
;
9521 char **stepping_actions
;
9523 struct cleanup
*old_chain
= NULL
;
9524 struct agent_expr
*aexpr
;
9525 struct cleanup
*aexpr_chain
= NULL
;
9528 /* Iterate over all the tracepoint locations. It's up to the target to
9529 notice multiple tracepoint packets with the same number but different
9530 addresses, and treat them as multiple locations. */
9531 for (loc
= t
->loc
; loc
; loc
= loc
->next
)
9533 encode_actions (t
, loc
, &tdp_actions
, &stepping_actions
);
9534 old_chain
= make_cleanup (free_actions_list_cleanup_wrapper
,
9536 (void) make_cleanup (free_actions_list_cleanup_wrapper
, stepping_actions
);
9538 tpaddr
= loc
->address
;
9539 sprintf_vma (addrbuf
, tpaddr
);
9540 sprintf (buf
, "QTDP:%x:%s:%c:%lx:%x", t
->number
,
9541 addrbuf
, /* address */
9542 (t
->enable_state
== bp_enabled
? 'E' : 'D'),
9543 t
->step_count
, t
->pass_count
);
9544 /* Fast tracepoints are mostly handled by the target, but we can
9545 tell the target how big of an instruction block should be moved
9547 if (t
->type
== bp_fast_tracepoint
)
9549 /* Only test for support at download time; we may not know
9550 target capabilities at definition time. */
9551 if (remote_supports_fast_tracepoints ())
9555 if (gdbarch_fast_tracepoint_valid_at (target_gdbarch
,
9556 tpaddr
, &isize
, NULL
))
9557 sprintf (buf
+ strlen (buf
), ":F%x", isize
);
9559 /* If it passed validation at definition but fails now,
9560 something is very wrong. */
9561 internal_error (__FILE__
, __LINE__
,
9562 "Fast tracepoint not valid during download");
9565 /* Fast tracepoints are functionally identical to regular
9566 tracepoints, so don't take lack of support as a reason to
9567 give up on the trace run. */
9568 warning (_("Target does not support fast tracepoints, downloading %d as regular tracepoint"), t
->number
);
9570 /* If the tracepoint has a conditional, make it into an agent
9571 expression and append to the definition. */
9574 /* Only test support at download time, we may not know target
9575 capabilities at definition time. */
9576 if (remote_supports_cond_tracepoints ())
9578 aexpr
= gen_eval_for_expr (tpaddr
, loc
->cond
);
9579 aexpr_chain
= make_cleanup_free_agent_expr (aexpr
);
9580 sprintf (buf
+ strlen (buf
), ":X%x,", aexpr
->len
);
9581 pkt
= buf
+ strlen (buf
);
9582 for (ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
9583 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
9585 do_cleanups (aexpr_chain
);
9588 warning (_("Target does not support conditional tracepoints, ignoring tp %d cond"), t
->number
);
9591 if (t
->commands
|| *default_collect
)
9594 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9595 if (strcmp (target_buf
, "OK"))
9596 error (_("Target does not support tracepoints."));
9598 /* do_single_steps (t); */
9601 for (ndx
= 0; tdp_actions
[ndx
]; ndx
++)
9603 QUIT
; /* allow user to bail out with ^C */
9604 sprintf (buf
, "QTDP:-%x:%s:%s%c",
9605 t
->number
, addrbuf
, /* address */
9607 ((tdp_actions
[ndx
+ 1] || stepping_actions
)
9610 remote_get_noisy_reply (&target_buf
,
9612 if (strcmp (target_buf
, "OK"))
9613 error (_("Error on target while setting tracepoints."));
9616 if (stepping_actions
)
9618 for (ndx
= 0; stepping_actions
[ndx
]; ndx
++)
9620 QUIT
; /* allow user to bail out with ^C */
9621 sprintf (buf
, "QTDP:-%x:%s:%s%s%s",
9622 t
->number
, addrbuf
, /* address */
9623 ((ndx
== 0) ? "S" : ""),
9624 stepping_actions
[ndx
],
9625 (stepping_actions
[ndx
+ 1] ? "-" : ""));
9627 remote_get_noisy_reply (&target_buf
,
9629 if (strcmp (target_buf
, "OK"))
9630 error (_("Error on target while setting tracepoints."));
9634 if (remote_protocol_packets
[PACKET_TracepointSource
].support
== PACKET_ENABLE
)
9638 strcpy (buf
, "QTDPsrc:");
9639 encode_source_string (t
->number
, loc
->address
,
9640 "at", t
->addr_string
, buf
+ strlen (buf
),
9641 2048 - strlen (buf
));
9644 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9645 if (strcmp (target_buf
, "OK"))
9646 warning (_("Target does not support source download."));
9650 strcpy (buf
, "QTDPsrc:");
9651 encode_source_string (t
->number
, loc
->address
,
9652 "cond", t
->cond_string
, buf
+ strlen (buf
),
9653 2048 - strlen (buf
));
9655 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9656 if (strcmp (target_buf
, "OK"))
9657 warning (_("Target does not support source download."));
9659 remote_download_command_source (t
->number
, loc
->address
,
9660 breakpoint_commands (t
));
9663 do_cleanups (old_chain
);
9668 remote_download_trace_state_variable (struct trace_state_variable
*tsv
)
9670 struct remote_state
*rs
= get_remote_state ();
9673 sprintf (rs
->buf
, "QTDV:%x:%s:%x:",
9674 tsv
->number
, phex ((ULONGEST
) tsv
->initial_value
, 8), tsv
->builtin
);
9675 p
= rs
->buf
+ strlen (rs
->buf
);
9676 if ((p
- rs
->buf
) + strlen (tsv
->name
) * 2 >= get_remote_packet_size ())
9677 error (_("Trace state variable name too long for tsv definition packet"));
9678 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
->name
), p
, 0);
9681 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9682 if (*target_buf
== '\0')
9683 error (_("Target does not support this command."));
9684 if (strcmp (target_buf
, "OK") != 0)
9685 error (_("Error on target while downloading trace state variable."));
9689 remote_trace_set_readonly_regions (void)
9697 return; /* No information to give. */
9699 strcpy (target_buf
, "QTro");
9700 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
9702 char tmp1
[40], tmp2
[40];
9704 if ((s
->flags
& SEC_LOAD
) == 0 ||
9705 /* (s->flags & SEC_CODE) == 0 || */
9706 (s
->flags
& SEC_READONLY
) == 0)
9711 size
= bfd_get_section_size (s
);
9712 sprintf_vma (tmp1
, lma
);
9713 sprintf_vma (tmp2
, lma
+ size
);
9714 sprintf (target_buf
+ strlen (target_buf
),
9715 ":%s,%s", tmp1
, tmp2
);
9719 putpkt (target_buf
);
9720 getpkt (&target_buf
, &target_buf_size
, 0);
9725 remote_trace_start (void)
9728 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9729 if (*target_buf
== '\0')
9730 error (_("Target does not support this command."));
9731 if (strcmp (target_buf
, "OK") != 0)
9732 error (_("Bogus reply from target: %s"), target_buf
);
9736 remote_get_trace_status (struct trace_status
*ts
)
9739 /* FIXME we need to get register block size some other way */
9740 extern int trace_regblock_size
;
9742 trace_regblock_size
= get_remote_arch_state ()->sizeof_g_packet
;
9744 putpkt ("qTStatus");
9745 p
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9747 /* If the remote target doesn't do tracing, flag it. */
9751 /* We're working with a live target. */
9754 /* Set some defaults. */
9755 ts
->running_known
= 0;
9756 ts
->stop_reason
= trace_stop_reason_unknown
;
9757 ts
->traceframe_count
= -1;
9758 ts
->buffer_free
= 0;
9761 error (_("Bogus trace status reply from target: %s"), target_buf
);
9763 parse_trace_status (p
, ts
);
9769 remote_trace_stop (void)
9772 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9773 if (*target_buf
== '\0')
9774 error (_("Target does not support this command."));
9775 if (strcmp (target_buf
, "OK") != 0)
9776 error (_("Bogus reply from target: %s"), target_buf
);
9780 remote_trace_find (enum trace_find_type type
, int num
,
9781 ULONGEST addr1
, ULONGEST addr2
,
9784 struct remote_state
*rs
= get_remote_state ();
9786 int target_frameno
= -1, target_tracept
= -1;
9789 strcpy (p
, "QTFrame:");
9790 p
= strchr (p
, '\0');
9794 sprintf (p
, "%x", num
);
9797 sprintf (p
, "pc:%s", phex_nz (addr1
, 0));
9800 sprintf (p
, "tdp:%x", num
);
9803 sprintf (p
, "range:%s:%s", phex_nz (addr1
, 0), phex_nz (addr2
, 0));
9806 sprintf (p
, "outside:%s:%s", phex_nz (addr1
, 0), phex_nz (addr2
, 0));
9809 error ("Unknown trace find type %d", type
);
9813 reply
= remote_get_noisy_reply (&(rs
->buf
), &sizeof_pkt
);
9815 error (_("Target does not support this command."));
9817 while (reply
&& *reply
)
9822 target_frameno
= (int) strtol (p
, &reply
, 16);
9824 error (_("Unable to parse trace frame number"));
9825 if (target_frameno
== -1)
9830 target_tracept
= (int) strtol (p
, &reply
, 16);
9832 error (_("Unable to parse tracepoint number"));
9834 case 'O': /* "OK"? */
9835 if (reply
[1] == 'K' && reply
[2] == '\0')
9838 error (_("Bogus reply from target: %s"), reply
);
9841 error (_("Bogus reply from target: %s"), reply
);
9844 *tpp
= target_tracept
;
9845 return target_frameno
;
9849 remote_get_trace_state_variable_value (int tsvnum
, LONGEST
*val
)
9851 struct remote_state
*rs
= get_remote_state ();
9855 sprintf (rs
->buf
, "qTV:%x", tsvnum
);
9857 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9858 if (reply
&& *reply
)
9862 unpack_varlen_hex (reply
+ 1, &uval
);
9863 *val
= (LONGEST
) uval
;
9871 remote_save_trace_data (const char *filename
)
9873 struct remote_state
*rs
= get_remote_state ();
9877 strcpy (p
, "QTSave:");
9879 if ((p
- rs
->buf
) + strlen (filename
) * 2 >= get_remote_packet_size ())
9880 error (_("Remote file name too long for trace save packet"));
9881 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, 0);
9884 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9886 error (_("Target does not support this command."));
9887 if (strcmp (reply
, "OK") != 0)
9888 error (_("Bogus reply from target: %s"), reply
);
9892 /* This is basically a memory transfer, but needs to be its own packet
9893 because we don't know how the target actually organizes its trace
9894 memory, plus we want to be able to ask for as much as possible, but
9895 not be unhappy if we don't get as much as we ask for. */
9898 remote_get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
9900 struct remote_state
*rs
= get_remote_state ();
9906 strcpy (p
, "qTBuffer:");
9908 p
+= hexnumstr (p
, offset
);
9910 p
+= hexnumstr (p
, len
);
9914 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9915 if (reply
&& *reply
)
9917 /* 'l' by itself means we're at the end of the buffer and
9918 there is nothing more to get. */
9922 /* Convert the reply into binary. Limit the number of bytes to
9923 convert according to our passed-in buffer size, rather than
9924 what was returned in the packet; if the target is
9925 unexpectedly generous and gives us a bigger reply than we
9926 asked for, we don't want to crash. */
9927 rslt
= hex2bin (target_buf
, buf
, len
);
9931 /* Something went wrong, flag as an error. */
9936 remote_set_disconnected_tracing (int val
)
9938 struct remote_state
*rs
= get_remote_state ();
9940 if (rs
->disconnected_tracing
)
9944 sprintf (rs
->buf
, "QTDisconnected:%x", val
);
9946 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9948 error (_("Target does not support this command."));
9949 if (strcmp (reply
, "OK") != 0)
9950 error (_("Bogus reply from target: %s"), reply
);
9953 warning (_("Target does not support disconnected tracing."));
9957 remote_core_of_thread (struct target_ops
*ops
, ptid_t ptid
)
9959 struct thread_info
*info
= find_thread_ptid (ptid
);
9961 if (info
&& info
->private)
9962 return info
->private->core
;
9967 remote_set_circular_trace_buffer (int val
)
9969 struct remote_state
*rs
= get_remote_state ();
9972 sprintf (rs
->buf
, "QTBuffer:circular:%x", val
);
9974 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9976 error (_("Target does not support this command."));
9977 if (strcmp (reply
, "OK") != 0)
9978 error (_("Bogus reply from target: %s"), reply
);
9982 init_remote_ops (void)
9984 remote_ops
.to_shortname
= "remote";
9985 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
9987 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
9988 Specify the serial device it is connected to\n\
9989 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
9990 remote_ops
.to_open
= remote_open
;
9991 remote_ops
.to_close
= remote_close
;
9992 remote_ops
.to_detach
= remote_detach
;
9993 remote_ops
.to_disconnect
= remote_disconnect
;
9994 remote_ops
.to_resume
= remote_resume
;
9995 remote_ops
.to_wait
= remote_wait
;
9996 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
9997 remote_ops
.to_store_registers
= remote_store_registers
;
9998 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
9999 remote_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
10000 remote_ops
.to_files_info
= remote_files_info
;
10001 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
10002 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
10003 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
10004 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
10005 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
10006 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
10007 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
10008 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
10009 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
10010 remote_ops
.to_kill
= remote_kill
;
10011 remote_ops
.to_load
= generic_load
;
10012 remote_ops
.to_mourn_inferior
= remote_mourn
;
10013 remote_ops
.to_notice_signals
= remote_notice_signals
;
10014 remote_ops
.to_thread_alive
= remote_thread_alive
;
10015 remote_ops
.to_find_new_threads
= remote_threads_info
;
10016 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
10017 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
10018 remote_ops
.to_get_ada_task_ptid
= remote_get_ada_task_ptid
;
10019 remote_ops
.to_stop
= remote_stop
;
10020 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
10021 remote_ops
.to_rcmd
= remote_rcmd
;
10022 remote_ops
.to_log_command
= serial_log_command
;
10023 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
10024 remote_ops
.to_stratum
= process_stratum
;
10025 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
10026 remote_ops
.to_has_memory
= default_child_has_memory
;
10027 remote_ops
.to_has_stack
= default_child_has_stack
;
10028 remote_ops
.to_has_registers
= default_child_has_registers
;
10029 remote_ops
.to_has_execution
= default_child_has_execution
;
10030 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
10031 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
10032 remote_ops
.to_magic
= OPS_MAGIC
;
10033 remote_ops
.to_memory_map
= remote_memory_map
;
10034 remote_ops
.to_flash_erase
= remote_flash_erase
;
10035 remote_ops
.to_flash_done
= remote_flash_done
;
10036 remote_ops
.to_read_description
= remote_read_description
;
10037 remote_ops
.to_search_memory
= remote_search_memory
;
10038 remote_ops
.to_can_async_p
= remote_can_async_p
;
10039 remote_ops
.to_is_async_p
= remote_is_async_p
;
10040 remote_ops
.to_async
= remote_async
;
10041 remote_ops
.to_async_mask
= remote_async_mask
;
10042 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
10043 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
10044 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
10045 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
10046 remote_ops
.to_trace_init
= remote_trace_init
;
10047 remote_ops
.to_download_tracepoint
= remote_download_tracepoint
;
10048 remote_ops
.to_download_trace_state_variable
= remote_download_trace_state_variable
;
10049 remote_ops
.to_trace_set_readonly_regions
= remote_trace_set_readonly_regions
;
10050 remote_ops
.to_trace_start
= remote_trace_start
;
10051 remote_ops
.to_get_trace_status
= remote_get_trace_status
;
10052 remote_ops
.to_trace_stop
= remote_trace_stop
;
10053 remote_ops
.to_trace_find
= remote_trace_find
;
10054 remote_ops
.to_get_trace_state_variable_value
= remote_get_trace_state_variable_value
;
10055 remote_ops
.to_save_trace_data
= remote_save_trace_data
;
10056 remote_ops
.to_upload_tracepoints
= remote_upload_tracepoints
;
10057 remote_ops
.to_upload_trace_state_variables
= remote_upload_trace_state_variables
;
10058 remote_ops
.to_get_raw_trace_data
= remote_get_raw_trace_data
;
10059 remote_ops
.to_set_disconnected_tracing
= remote_set_disconnected_tracing
;
10060 remote_ops
.to_set_circular_trace_buffer
= remote_set_circular_trace_buffer
;
10061 remote_ops
.to_core_of_thread
= remote_core_of_thread
;
10062 remote_ops
.to_verify_memory
= remote_verify_memory
;
10063 remote_ops
.to_get_tib_address
= remote_get_tib_address
;
10066 /* Set up the extended remote vector by making a copy of the standard
10067 remote vector and adding to it. */
10070 init_extended_remote_ops (void)
10072 extended_remote_ops
= remote_ops
;
10074 extended_remote_ops
.to_shortname
= "extended-remote";
10075 extended_remote_ops
.to_longname
=
10076 "Extended remote serial target in gdb-specific protocol";
10077 extended_remote_ops
.to_doc
=
10078 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
10079 Specify the serial device it is connected to (e.g. /dev/ttya).";
10080 extended_remote_ops
.to_open
= extended_remote_open
;
10081 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
10082 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
10083 extended_remote_ops
.to_detach
= extended_remote_detach
;
10084 extended_remote_ops
.to_attach
= extended_remote_attach
;
10085 extended_remote_ops
.to_kill
= extended_remote_kill
;
10089 remote_can_async_p (void)
10091 if (!target_async_permitted
)
10092 /* We only enable async when the user specifically asks for it. */
10095 /* We're async whenever the serial device is. */
10096 return remote_async_mask_value
&& serial_can_async_p (remote_desc
);
10100 remote_is_async_p (void)
10102 if (!target_async_permitted
)
10103 /* We only enable async when the user specifically asks for it. */
10106 /* We're async whenever the serial device is. */
10107 return remote_async_mask_value
&& serial_is_async_p (remote_desc
);
10110 /* Pass the SERIAL event on and up to the client. One day this code
10111 will be able to delay notifying the client of an event until the
10112 point where an entire packet has been received. */
10114 static void (*async_client_callback
) (enum inferior_event_type event_type
,
10116 static void *async_client_context
;
10117 static serial_event_ftype remote_async_serial_handler
;
10120 remote_async_serial_handler (struct serial
*scb
, void *context
)
10122 /* Don't propogate error information up to the client. Instead let
10123 the client find out about the error by querying the target. */
10124 async_client_callback (INF_REG_EVENT
, async_client_context
);
10128 remote_async_inferior_event_handler (gdb_client_data data
)
10130 inferior_event_handler (INF_REG_EVENT
, NULL
);
10134 remote_async_get_pending_events_handler (gdb_client_data data
)
10136 remote_get_pending_stop_replies ();
10140 remote_async (void (*callback
) (enum inferior_event_type event_type
,
10141 void *context
), void *context
)
10143 if (remote_async_mask_value
== 0)
10144 internal_error (__FILE__
, __LINE__
,
10145 _("Calling remote_async when async is masked"));
10147 if (callback
!= NULL
)
10149 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
10150 async_client_callback
= callback
;
10151 async_client_context
= context
;
10154 serial_async (remote_desc
, NULL
, NULL
);
10158 remote_async_mask (int new_mask
)
10160 int curr_mask
= remote_async_mask_value
;
10162 remote_async_mask_value
= new_mask
;
10167 set_remote_cmd (char *args
, int from_tty
)
10169 help_list (remote_set_cmdlist
, "set remote ", -1, gdb_stdout
);
10173 show_remote_cmd (char *args
, int from_tty
)
10175 /* We can't just use cmd_show_list here, because we want to skip
10176 the redundant "show remote Z-packet" and the legacy aliases. */
10177 struct cleanup
*showlist_chain
;
10178 struct cmd_list_element
*list
= remote_show_cmdlist
;
10180 showlist_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "showlist");
10181 for (; list
!= NULL
; list
= list
->next
)
10182 if (strcmp (list
->name
, "Z-packet") == 0)
10184 else if (list
->type
== not_set_cmd
)
10185 /* Alias commands are exactly like the original, except they
10186 don't have the normal type. */
10190 struct cleanup
*option_chain
10191 = make_cleanup_ui_out_tuple_begin_end (uiout
, "option");
10193 ui_out_field_string (uiout
, "name", list
->name
);
10194 ui_out_text (uiout
, ": ");
10195 if (list
->type
== show_cmd
)
10196 do_setshow_command ((char *) NULL
, from_tty
, list
);
10198 cmd_func (list
, NULL
, from_tty
);
10199 /* Close the tuple. */
10200 do_cleanups (option_chain
);
10203 /* Close the tuple. */
10204 do_cleanups (showlist_chain
);
10208 /* Function to be called whenever a new objfile (shlib) is detected. */
10210 remote_new_objfile (struct objfile
*objfile
)
10212 if (remote_desc
!= 0) /* Have a remote connection. */
10213 remote_check_symbols (objfile
);
10216 /* Pull all the tracepoints defined on the target and create local
10217 data structures representing them. We don't want to create real
10218 tracepoints yet, we don't want to mess up the user's existing
10222 remote_upload_tracepoints (struct uploaded_tp
**utpp
)
10224 struct remote_state
*rs
= get_remote_state ();
10227 /* Ask for a first packet of tracepoint definition. */
10229 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10231 while (*p
&& *p
!= 'l')
10233 parse_tracepoint_definition (p
, utpp
);
10234 /* Ask for another packet of tracepoint definition. */
10236 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10243 remote_upload_trace_state_variables (struct uploaded_tsv
**utsvp
)
10245 struct remote_state
*rs
= get_remote_state ();
10248 /* Ask for a first packet of variable definition. */
10250 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10252 while (*p
&& *p
!= 'l')
10254 parse_tsv_definition (p
, utsvp
);
10255 /* Ask for another packet of variable definition. */
10257 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10264 _initialize_remote (void)
10266 struct remote_state
*rs
;
10267 struct cmd_list_element
*cmd
;
10270 /* architecture specific data */
10271 remote_gdbarch_data_handle
=
10272 gdbarch_data_register_post_init (init_remote_state
);
10273 remote_g_packet_data_handle
=
10274 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
10276 /* Initialize the per-target state. At the moment there is only one
10277 of these, not one per target. Only one target is active at a
10278 time. The default buffer size is unimportant; it will be expanded
10279 whenever a larger buffer is needed. */
10280 rs
= get_remote_state_raw ();
10281 rs
->buf_size
= 400;
10282 rs
->buf
= xmalloc (rs
->buf_size
);
10284 init_remote_ops ();
10285 add_target (&remote_ops
);
10287 init_extended_remote_ops ();
10288 add_target (&extended_remote_ops
);
10290 /* Hook into new objfile notification. */
10291 observer_attach_new_objfile (remote_new_objfile
);
10293 /* Set up signal handlers. */
10294 sigint_remote_token
=
10295 create_async_signal_handler (async_remote_interrupt
, NULL
);
10296 sigint_remote_twice_token
=
10297 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
10300 init_remote_threadtests ();
10303 /* set/show remote ... */
10305 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
10306 Remote protocol specific variables\n\
10307 Configure various remote-protocol specific variables such as\n\
10308 the packets being used"),
10309 &remote_set_cmdlist
, "set remote ",
10310 0 /* allow-unknown */, &setlist
);
10311 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
10312 Remote protocol specific variables\n\
10313 Configure various remote-protocol specific variables such as\n\
10314 the packets being used"),
10315 &remote_show_cmdlist
, "show remote ",
10316 0 /* allow-unknown */, &showlist
);
10318 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
10319 Compare section data on target to the exec file.\n\
10320 Argument is a single section name (default: all loaded sections)."),
10323 add_cmd ("packet", class_maintenance
, packet_command
, _("\
10324 Send an arbitrary packet to a remote target.\n\
10325 maintenance packet TEXT\n\
10326 If GDB is talking to an inferior via the GDB serial protocol, then\n\
10327 this command sends the string TEXT to the inferior, and displays the\n\
10328 response packet. GDB supplies the initial `$' character, and the\n\
10329 terminating `#' character and checksum."),
10332 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
10333 Set whether to send break if interrupted."), _("\
10334 Show whether to send break if interrupted."), _("\
10335 If set, a break, instead of a cntrl-c, is sent to the remote target."),
10336 set_remotebreak
, show_remotebreak
,
10337 &setlist
, &showlist
);
10338 cmd_name
= "remotebreak";
10339 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
10340 deprecate_cmd (cmd
, "set remote interrupt-sequence");
10341 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
10342 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
10343 deprecate_cmd (cmd
, "show remote interrupt-sequence");
10345 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
10346 interrupt_sequence_modes
, &interrupt_sequence_mode
, _("\
10347 Set interrupt sequence to remote target."), _("\
10348 Show interrupt sequence to remote target."), _("\
10349 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
10350 NULL
, show_interrupt_sequence
,
10351 &remote_set_cmdlist
,
10352 &remote_show_cmdlist
);
10354 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
10355 &interrupt_on_connect
, _("\
10356 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
10357 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
10358 If set, interrupt sequence is sent to remote target."),
10360 &remote_set_cmdlist
, &remote_show_cmdlist
);
10362 /* Install commands for configuring memory read/write packets. */
10364 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
10365 Set the maximum number of bytes per memory write packet (deprecated)."),
10367 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
10368 Show the maximum number of bytes per memory write packet (deprecated)."),
10370 add_cmd ("memory-write-packet-size", no_class
,
10371 set_memory_write_packet_size
, _("\
10372 Set the maximum number of bytes per memory-write packet.\n\
10373 Specify the number of bytes in a packet or 0 (zero) for the\n\
10374 default packet size. The actual limit is further reduced\n\
10375 dependent on the target. Specify ``fixed'' to disable the\n\
10376 further restriction and ``limit'' to enable that restriction."),
10377 &remote_set_cmdlist
);
10378 add_cmd ("memory-read-packet-size", no_class
,
10379 set_memory_read_packet_size
, _("\
10380 Set the maximum number of bytes per memory-read packet.\n\
10381 Specify the number of bytes in a packet or 0 (zero) for the\n\
10382 default packet size. The actual limit is further reduced\n\
10383 dependent on the target. Specify ``fixed'' to disable the\n\
10384 further restriction and ``limit'' to enable that restriction."),
10385 &remote_set_cmdlist
);
10386 add_cmd ("memory-write-packet-size", no_class
,
10387 show_memory_write_packet_size
,
10388 _("Show the maximum number of bytes per memory-write packet."),
10389 &remote_show_cmdlist
);
10390 add_cmd ("memory-read-packet-size", no_class
,
10391 show_memory_read_packet_size
,
10392 _("Show the maximum number of bytes per memory-read packet."),
10393 &remote_show_cmdlist
);
10395 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
10396 &remote_hw_watchpoint_limit
, _("\
10397 Set the maximum number of target hardware watchpoints."), _("\
10398 Show the maximum number of target hardware watchpoints."), _("\
10399 Specify a negative limit for unlimited."),
10400 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
10401 &remote_set_cmdlist
, &remote_show_cmdlist
);
10402 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
10403 &remote_hw_breakpoint_limit
, _("\
10404 Set the maximum number of target hardware breakpoints."), _("\
10405 Show the maximum number of target hardware breakpoints."), _("\
10406 Specify a negative limit for unlimited."),
10407 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
10408 &remote_set_cmdlist
, &remote_show_cmdlist
);
10410 add_setshow_integer_cmd ("remoteaddresssize", class_obscure
,
10411 &remote_address_size
, _("\
10412 Set the maximum size of the address (in bits) in a memory packet."), _("\
10413 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
10415 NULL
, /* FIXME: i18n: */
10416 &setlist
, &showlist
);
10418 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
10419 "X", "binary-download", 1);
10421 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
10422 "vCont", "verbose-resume", 0);
10424 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
10425 "QPassSignals", "pass-signals", 0);
10427 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
10428 "qSymbol", "symbol-lookup", 0);
10430 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
10431 "P", "set-register", 1);
10433 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
10434 "p", "fetch-register", 1);
10436 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
10437 "Z0", "software-breakpoint", 0);
10439 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
10440 "Z1", "hardware-breakpoint", 0);
10442 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
10443 "Z2", "write-watchpoint", 0);
10445 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
10446 "Z3", "read-watchpoint", 0);
10448 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
10449 "Z4", "access-watchpoint", 0);
10451 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
10452 "qXfer:auxv:read", "read-aux-vector", 0);
10454 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
10455 "qXfer:features:read", "target-features", 0);
10457 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
10458 "qXfer:libraries:read", "library-info", 0);
10460 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
10461 "qXfer:memory-map:read", "memory-map", 0);
10463 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
10464 "qXfer:spu:read", "read-spu-object", 0);
10466 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
10467 "qXfer:spu:write", "write-spu-object", 0);
10469 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
10470 "qXfer:osdata:read", "osdata", 0);
10472 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
10473 "qXfer:threads:read", "threads", 0);
10475 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
10476 "qXfer:siginfo:read", "read-siginfo-object", 0);
10478 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
10479 "qXfer:siginfo:write", "write-siginfo-object", 0);
10481 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
10482 "qGetTLSAddr", "get-thread-local-storage-address",
10485 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
10486 "qGetTIBAddr", "get-thread-information-block-address",
10489 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
10490 "bc", "reverse-continue", 0);
10492 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
10493 "bs", "reverse-step", 0);
10495 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
10496 "qSupported", "supported-packets", 0);
10498 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
10499 "qSearch:memory", "search-memory", 0);
10501 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
10502 "vFile:open", "hostio-open", 0);
10504 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
10505 "vFile:pread", "hostio-pread", 0);
10507 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
10508 "vFile:pwrite", "hostio-pwrite", 0);
10510 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
10511 "vFile:close", "hostio-close", 0);
10513 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
10514 "vFile:unlink", "hostio-unlink", 0);
10516 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
10517 "vAttach", "attach", 0);
10519 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
10522 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
10523 "QStartNoAckMode", "noack", 0);
10525 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
10526 "vKill", "kill", 0);
10528 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
10529 "qAttached", "query-attached", 0);
10531 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
10532 "ConditionalTracepoints", "conditional-tracepoints", 0);
10533 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
10534 "FastTracepoints", "fast-tracepoints", 0);
10536 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
10537 "TracepointSource", "TracepointSource", 0);
10539 /* Keep the old ``set remote Z-packet ...'' working. Each individual
10540 Z sub-packet has its own set and show commands, but users may
10541 have sets to this variable in their .gdbinit files (or in their
10543 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
10544 &remote_Z_packet_detect
, _("\
10545 Set use of remote protocol `Z' packets"), _("\
10546 Show use of remote protocol `Z' packets "), _("\
10547 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
10549 set_remote_protocol_Z_packet_cmd
,
10550 show_remote_protocol_Z_packet_cmd
, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
10551 &remote_set_cmdlist
, &remote_show_cmdlist
);
10553 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
10554 Manipulate files on the remote system\n\
10555 Transfer files to and from the remote target system."),
10556 &remote_cmdlist
, "remote ",
10557 0 /* allow-unknown */, &cmdlist
);
10559 add_cmd ("put", class_files
, remote_put_command
,
10560 _("Copy a local file to the remote system."),
10563 add_cmd ("get", class_files
, remote_get_command
,
10564 _("Copy a remote file to the local system."),
10567 add_cmd ("delete", class_files
, remote_delete_command
,
10568 _("Delete a remote file."),
10571 remote_exec_file
= xstrdup ("");
10572 add_setshow_string_noescape_cmd ("exec-file", class_files
,
10573 &remote_exec_file
, _("\
10574 Set the remote pathname for \"run\""), _("\
10575 Show the remote pathname for \"run\""), NULL
, NULL
, NULL
,
10576 &remote_set_cmdlist
, &remote_show_cmdlist
);
10578 /* Eventually initialize fileio. See fileio.c */
10579 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
10581 /* Take advantage of the fact that the LWP field is not used, to tag
10582 special ptids with it set to != 0. */
10583 magic_null_ptid
= ptid_build (42000, 1, -1);
10584 not_sent_ptid
= ptid_build (42000, 1, -2);
10585 any_thread_ptid
= ptid_build (42000, 1, 0);
10587 target_buf_size
= 2048;
10588 target_buf
= xmalloc (target_buf_size
);