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, 2011 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
);
215 static void remote_set_permissions (void);
218 static int remote_get_trace_status (struct trace_status
*ts
);
220 static int remote_upload_tracepoints (struct uploaded_tp
**utpp
);
222 static int remote_upload_trace_state_variables (struct uploaded_tsv
**utsvp
);
224 static void remote_query_supported (void);
226 static void remote_check_symbols (struct objfile
*objfile
);
228 void _initialize_remote (void);
231 static struct stop_reply
*stop_reply_xmalloc (void);
232 static void stop_reply_xfree (struct stop_reply
*);
233 static void do_stop_reply_xfree (void *arg
);
234 static void remote_parse_stop_reply (char *buf
, struct stop_reply
*);
235 static void push_stop_reply (struct stop_reply
*);
236 static void remote_get_pending_stop_replies (void);
237 static void discard_pending_stop_replies (int pid
);
238 static int peek_stop_reply (ptid_t ptid
);
240 static void remote_async_inferior_event_handler (gdb_client_data
);
241 static void remote_async_get_pending_events_handler (gdb_client_data
);
243 static void remote_terminal_ours (void);
245 static int remote_read_description_p (struct target_ops
*target
);
247 static void remote_console_output (char *msg
);
249 /* The non-stop remote protocol provisions for one pending stop reply.
250 This is where we keep it until it is acknowledged. */
252 static struct stop_reply
*pending_stop_reply
= NULL
;
256 static struct cmd_list_element
*remote_cmdlist
;
258 /* For "set remote" and "show remote". */
260 static struct cmd_list_element
*remote_set_cmdlist
;
261 static struct cmd_list_element
*remote_show_cmdlist
;
263 /* Description of the remote protocol state for the currently
264 connected target. This is per-target state, and independent of the
265 selected architecture. */
269 /* A buffer to use for incoming packets, and its current size. The
270 buffer is grown dynamically for larger incoming packets.
271 Outgoing packets may also be constructed in this buffer.
272 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
273 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
278 /* If we negotiated packet size explicitly (and thus can bypass
279 heuristics for the largest packet size that will not overflow
280 a buffer in the stub), this will be set to that packet size.
281 Otherwise zero, meaning to use the guessed size. */
282 long explicit_packet_size
;
284 /* remote_wait is normally called when the target is running and
285 waits for a stop reply packet. But sometimes we need to call it
286 when the target is already stopped. We can send a "?" packet
287 and have remote_wait read the response. Or, if we already have
288 the response, we can stash it in BUF and tell remote_wait to
289 skip calling getpkt. This flag is set when BUF contains a
290 stop reply packet and the target is not waiting. */
291 int cached_wait_status
;
293 /* True, if in no ack mode. That is, neither GDB nor the stub will
294 expect acks from each other. The connection is assumed to be
298 /* True if we're connected in extended remote mode. */
301 /* True if the stub reported support for multi-process
303 int multi_process_aware
;
305 /* True if we resumed the target and we're waiting for the target to
306 stop. In the mean time, we can't start another command/query.
307 The remote server wouldn't be ready to process it, so we'd
308 timeout waiting for a reply that would never come and eventually
309 we'd close the connection. This can happen in asynchronous mode
310 because we allow GDB commands while the target is running. */
311 int waiting_for_stop_reply
;
313 /* True if the stub reports support for non-stop mode. */
316 /* True if the stub reports support for vCont;t. */
319 /* True if the stub reports support for conditional tracepoints. */
320 int cond_tracepoints
;
322 /* True if the stub reports support for fast tracepoints. */
323 int fast_tracepoints
;
325 /* True if the stub reports support for static tracepoints. */
326 int static_tracepoints
;
328 /* True if the stub can continue running a trace while GDB is
330 int disconnected_tracing
;
332 /* Nonzero if the user has pressed Ctrl-C, but the target hasn't
333 responded to that. */
337 /* Private data that we'll store in (struct thread_info)->private. */
338 struct private_thread_info
345 free_private_thread_info (struct private_thread_info
*info
)
351 /* Returns true if the multi-process extensions are in effect. */
353 remote_multi_process_p (struct remote_state
*rs
)
355 return rs
->extended
&& rs
->multi_process_aware
;
358 /* This data could be associated with a target, but we do not always
359 have access to the current target when we need it, so for now it is
360 static. This will be fine for as long as only one target is in use
362 static struct remote_state remote_state
;
364 static struct remote_state
*
365 get_remote_state_raw (void)
367 return &remote_state
;
370 /* Description of the remote protocol for a given architecture. */
374 long offset
; /* Offset into G packet. */
375 long regnum
; /* GDB's internal register number. */
376 LONGEST pnum
; /* Remote protocol register number. */
377 int in_g_packet
; /* Always part of G packet. */
378 /* long size in bytes; == register_size (target_gdbarch, regnum);
380 /* char *name; == gdbarch_register_name (target_gdbarch, regnum);
384 struct remote_arch_state
386 /* Description of the remote protocol registers. */
387 long sizeof_g_packet
;
389 /* Description of the remote protocol registers indexed by REGNUM
390 (making an array gdbarch_num_regs in size). */
391 struct packet_reg
*regs
;
393 /* This is the size (in chars) of the first response to the ``g''
394 packet. It is used as a heuristic when determining the maximum
395 size of memory-read and memory-write packets. A target will
396 typically only reserve a buffer large enough to hold the ``g''
397 packet. The size does not include packet overhead (headers and
399 long actual_register_packet_size
;
401 /* This is the maximum size (in chars) of a non read/write packet.
402 It is also used as a cap on the size of read/write packets. */
403 long remote_packet_size
;
406 long sizeof_pkt
= 2000;
408 /* Utility: generate error from an incoming stub packet. */
410 trace_error (char *buf
)
413 return; /* not an error msg */
416 case '1': /* malformed packet error */
417 if (*++buf
== '0') /* general case: */
418 error (_("remote.c: error in outgoing packet."));
420 error (_("remote.c: error in outgoing packet at field #%ld."),
421 strtol (buf
, NULL
, 16));
423 error (_("trace API error 0x%s."), ++buf
);
425 error (_("Target returns error code '%s'."), buf
);
429 /* Utility: wait for reply from stub, while accepting "O" packets. */
431 remote_get_noisy_reply (char **buf_p
,
434 do /* Loop on reply from remote stub. */
438 QUIT
; /* Allow user to bail out with ^C. */
439 getpkt (buf_p
, sizeof_buf
, 0);
443 else if (strncmp (buf
, "qRelocInsn:", strlen ("qRelocInsn:")) == 0)
446 CORE_ADDR from
, to
, org_to
;
448 int adjusted_size
= 0;
449 volatile struct gdb_exception ex
;
451 p
= buf
+ strlen ("qRelocInsn:");
452 pp
= unpack_varlen_hex (p
, &ul
);
454 error (_("invalid qRelocInsn packet: %s"), buf
);
458 unpack_varlen_hex (p
, &ul
);
463 TRY_CATCH (ex
, RETURN_MASK_ALL
)
465 gdbarch_relocate_instruction (target_gdbarch
, &to
, from
);
469 adjusted_size
= to
- org_to
;
471 sprintf (buf
, "qRelocInsn:%x", adjusted_size
);
474 else if (ex
.reason
< 0 && ex
.error
== MEMORY_ERROR
)
476 /* Propagate memory errors silently back to the target.
477 The stub may have limited the range of addresses we
478 can write to, for example. */
483 /* Something unexpectedly bad happened. Be verbose so
484 we can tell what, and propagate the error back to the
485 stub, so it doesn't get stuck waiting for a
487 exception_fprintf (gdb_stderr
, ex
,
488 _("warning: relocating instruction: "));
492 else if (buf
[0] == 'O' && buf
[1] != 'K')
493 remote_console_output (buf
+ 1); /* 'O' message from stub */
495 return buf
; /* Here's the actual reply. */
500 /* Handle for retreving the remote protocol data from gdbarch. */
501 static struct gdbarch_data
*remote_gdbarch_data_handle
;
503 static struct remote_arch_state
*
504 get_remote_arch_state (void)
506 return gdbarch_data (target_gdbarch
, remote_gdbarch_data_handle
);
509 /* Fetch the global remote target state. */
511 static struct remote_state
*
512 get_remote_state (void)
514 /* Make sure that the remote architecture state has been
515 initialized, because doing so might reallocate rs->buf. Any
516 function which calls getpkt also needs to be mindful of changes
517 to rs->buf, but this call limits the number of places which run
519 get_remote_arch_state ();
521 return get_remote_state_raw ();
525 compare_pnums (const void *lhs_
, const void *rhs_
)
527 const struct packet_reg
* const *lhs
= lhs_
;
528 const struct packet_reg
* const *rhs
= rhs_
;
530 if ((*lhs
)->pnum
< (*rhs
)->pnum
)
532 else if ((*lhs
)->pnum
== (*rhs
)->pnum
)
539 init_remote_state (struct gdbarch
*gdbarch
)
541 int regnum
, num_remote_regs
, offset
;
542 struct remote_state
*rs
= get_remote_state_raw ();
543 struct remote_arch_state
*rsa
;
544 struct packet_reg
**remote_regs
;
546 rsa
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_arch_state
);
548 /* Use the architecture to build a regnum<->pnum table, which will be
549 1:1 unless a feature set specifies otherwise. */
550 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
,
551 gdbarch_num_regs (gdbarch
),
553 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
555 struct packet_reg
*r
= &rsa
->regs
[regnum
];
557 if (register_size (gdbarch
, regnum
) == 0)
558 /* Do not try to fetch zero-sized (placeholder) registers. */
561 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
566 /* Define the g/G packet format as the contents of each register
567 with a remote protocol number, in order of ascending protocol
570 remote_regs
= alloca (gdbarch_num_regs (gdbarch
)
571 * sizeof (struct packet_reg
*));
572 for (num_remote_regs
= 0, regnum
= 0;
573 regnum
< gdbarch_num_regs (gdbarch
);
575 if (rsa
->regs
[regnum
].pnum
!= -1)
576 remote_regs
[num_remote_regs
++] = &rsa
->regs
[regnum
];
578 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
581 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
583 remote_regs
[regnum
]->in_g_packet
= 1;
584 remote_regs
[regnum
]->offset
= offset
;
585 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
588 /* Record the maximum possible size of the g packet - it may turn out
590 rsa
->sizeof_g_packet
= offset
;
592 /* Default maximum number of characters in a packet body. Many
593 remote stubs have a hardwired buffer size of 400 bytes
594 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
595 as the maximum packet-size to ensure that the packet and an extra
596 NUL character can always fit in the buffer. This stops GDB
597 trashing stubs that try to squeeze an extra NUL into what is
598 already a full buffer (As of 1999-12-04 that was most stubs). */
599 rsa
->remote_packet_size
= 400 - 1;
601 /* This one is filled in when a ``g'' packet is received. */
602 rsa
->actual_register_packet_size
= 0;
604 /* Should rsa->sizeof_g_packet needs more space than the
605 default, adjust the size accordingly. Remember that each byte is
606 encoded as two characters. 32 is the overhead for the packet
607 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
608 (``$NN:G...#NN'') is a better guess, the below has been padded a
610 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
611 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
613 /* Make sure that the packet buffer is plenty big enough for
614 this architecture. */
615 if (rs
->buf_size
< rsa
->remote_packet_size
)
617 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
618 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
624 /* Return the current allowed size of a remote packet. This is
625 inferred from the current architecture, and should be used to
626 limit the length of outgoing packets. */
628 get_remote_packet_size (void)
630 struct remote_state
*rs
= get_remote_state ();
631 struct remote_arch_state
*rsa
= get_remote_arch_state ();
633 if (rs
->explicit_packet_size
)
634 return rs
->explicit_packet_size
;
636 return rsa
->remote_packet_size
;
639 static struct packet_reg
*
640 packet_reg_from_regnum (struct remote_arch_state
*rsa
, long regnum
)
642 if (regnum
< 0 && regnum
>= gdbarch_num_regs (target_gdbarch
))
646 struct packet_reg
*r
= &rsa
->regs
[regnum
];
648 gdb_assert (r
->regnum
== regnum
);
653 static struct packet_reg
*
654 packet_reg_from_pnum (struct remote_arch_state
*rsa
, LONGEST pnum
)
658 for (i
= 0; i
< gdbarch_num_regs (target_gdbarch
); i
++)
660 struct packet_reg
*r
= &rsa
->regs
[i
];
668 /* FIXME: graces/2002-08-08: These variables should eventually be
669 bound to an instance of the target object (as in gdbarch-tdep()),
670 when such a thing exists. */
672 /* This is set to the data address of the access causing the target
673 to stop for a watchpoint. */
674 static CORE_ADDR remote_watch_data_address
;
676 /* This is non-zero if target stopped for a watchpoint. */
677 static int remote_stopped_by_watchpoint_p
;
679 static struct target_ops remote_ops
;
681 static struct target_ops extended_remote_ops
;
683 static int remote_async_mask_value
= 1;
685 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
686 ``forever'' still use the normal timeout mechanism. This is
687 currently used by the ASYNC code to guarentee that target reads
688 during the initial connect always time-out. Once getpkt has been
689 modified to return a timeout indication and, in turn
690 remote_wait()/wait_for_inferior() have gained a timeout parameter
692 static int wait_forever_enabled_p
= 1;
694 /* Allow the user to specify what sequence to send to the remote
695 when he requests a program interruption: Although ^C is usually
696 what remote systems expect (this is the default, here), it is
697 sometimes preferable to send a break. On other systems such
698 as the Linux kernel, a break followed by g, which is Magic SysRq g
699 is required in order to interrupt the execution. */
700 const char interrupt_sequence_control_c
[] = "Ctrl-C";
701 const char interrupt_sequence_break
[] = "BREAK";
702 const char interrupt_sequence_break_g
[] = "BREAK-g";
703 static const char *interrupt_sequence_modes
[] =
705 interrupt_sequence_control_c
,
706 interrupt_sequence_break
,
707 interrupt_sequence_break_g
,
710 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
713 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
714 struct cmd_list_element
*c
,
717 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
718 fprintf_filtered (file
,
719 _("Send the ASCII ETX character (Ctrl-c) "
720 "to the remote target to interrupt the "
721 "execution of the program.\n"));
722 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
723 fprintf_filtered (file
,
724 _("send a break signal to the remote target "
725 "to interrupt the execution of the program.\n"));
726 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
727 fprintf_filtered (file
,
728 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
729 "the remote target to interrupt the execution "
730 "of Linux kernel.\n"));
732 internal_error (__FILE__
, __LINE__
,
733 _("Invalid value for interrupt_sequence_mode: %s."),
734 interrupt_sequence_mode
);
737 /* This boolean variable specifies whether interrupt_sequence is sent
738 to the remote target when gdb connects to it.
739 This is mostly needed when you debug the Linux kernel: The Linux kernel
740 expects BREAK g which is Magic SysRq g for connecting gdb. */
741 static int interrupt_on_connect
= 0;
743 /* This variable is used to implement the "set/show remotebreak" commands.
744 Since these commands are now deprecated in favor of "set/show remote
745 interrupt-sequence", it no longer has any effect on the code. */
746 static int remote_break
;
749 set_remotebreak (char *args
, int from_tty
, struct cmd_list_element
*c
)
752 interrupt_sequence_mode
= interrupt_sequence_break
;
754 interrupt_sequence_mode
= interrupt_sequence_control_c
;
758 show_remotebreak (struct ui_file
*file
, int from_tty
,
759 struct cmd_list_element
*c
,
764 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
765 remote_open knows that we don't have a file open when the program
767 static struct serial
*remote_desc
= NULL
;
769 /* This variable sets the number of bits in an address that are to be
770 sent in a memory ("M" or "m") packet. Normally, after stripping
771 leading zeros, the entire address would be sent. This variable
772 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
773 initial implementation of remote.c restricted the address sent in
774 memory packets to ``host::sizeof long'' bytes - (typically 32
775 bits). Consequently, for 64 bit targets, the upper 32 bits of an
776 address was never sent. Since fixing this bug may cause a break in
777 some remote targets this variable is principly provided to
778 facilitate backward compatibility. */
780 static int remote_address_size
;
782 /* Temporary to track who currently owns the terminal. See
783 remote_terminal_* for more details. */
785 static int remote_async_terminal_ours_p
;
787 /* The executable file to use for "run" on the remote side. */
789 static char *remote_exec_file
= "";
792 /* User configurable variables for the number of characters in a
793 memory read/write packet. MIN (rsa->remote_packet_size,
794 rsa->sizeof_g_packet) is the default. Some targets need smaller
795 values (fifo overruns, et.al.) and some users need larger values
796 (speed up transfers). The variables ``preferred_*'' (the user
797 request), ``current_*'' (what was actually set) and ``forced_*''
798 (Positive - a soft limit, negative - a hard limit). */
800 struct memory_packet_config
807 /* Compute the current size of a read/write packet. Since this makes
808 use of ``actual_register_packet_size'' the computation is dynamic. */
811 get_memory_packet_size (struct memory_packet_config
*config
)
813 struct remote_state
*rs
= get_remote_state ();
814 struct remote_arch_state
*rsa
= get_remote_arch_state ();
816 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
817 law?) that some hosts don't cope very well with large alloca()
818 calls. Eventually the alloca() code will be replaced by calls to
819 xmalloc() and make_cleanups() allowing this restriction to either
820 be lifted or removed. */
821 #ifndef MAX_REMOTE_PACKET_SIZE
822 #define MAX_REMOTE_PACKET_SIZE 16384
824 /* NOTE: 20 ensures we can write at least one byte. */
825 #ifndef MIN_REMOTE_PACKET_SIZE
826 #define MIN_REMOTE_PACKET_SIZE 20
831 if (config
->size
<= 0)
832 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
834 what_they_get
= config
->size
;
838 what_they_get
= get_remote_packet_size ();
839 /* Limit the packet to the size specified by the user. */
841 && what_they_get
> config
->size
)
842 what_they_get
= config
->size
;
844 /* Limit it to the size of the targets ``g'' response unless we have
845 permission from the stub to use a larger packet size. */
846 if (rs
->explicit_packet_size
== 0
847 && rsa
->actual_register_packet_size
> 0
848 && what_they_get
> rsa
->actual_register_packet_size
)
849 what_they_get
= rsa
->actual_register_packet_size
;
851 if (what_they_get
> MAX_REMOTE_PACKET_SIZE
)
852 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
853 if (what_they_get
< MIN_REMOTE_PACKET_SIZE
)
854 what_they_get
= MIN_REMOTE_PACKET_SIZE
;
856 /* Make sure there is room in the global buffer for this packet
857 (including its trailing NUL byte). */
858 if (rs
->buf_size
< what_they_get
+ 1)
860 rs
->buf_size
= 2 * what_they_get
;
861 rs
->buf
= xrealloc (rs
->buf
, 2 * what_they_get
);
864 return what_they_get
;
867 /* Update the size of a read/write packet. If they user wants
868 something really big then do a sanity check. */
871 set_memory_packet_size (char *args
, struct memory_packet_config
*config
)
873 int fixed_p
= config
->fixed_p
;
874 long size
= config
->size
;
877 error (_("Argument required (integer, `fixed' or `limited')."));
878 else if (strcmp (args
, "hard") == 0
879 || strcmp (args
, "fixed") == 0)
881 else if (strcmp (args
, "soft") == 0
882 || strcmp (args
, "limit") == 0)
888 size
= strtoul (args
, &end
, 0);
890 error (_("Invalid %s (bad syntax)."), config
->name
);
892 /* Instead of explicitly capping the size of a packet to
893 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
894 instead allowed to set the size to something arbitrarily
896 if (size
> MAX_REMOTE_PACKET_SIZE
)
897 error (_("Invalid %s (too large)."), config
->name
);
901 if (fixed_p
&& !config
->fixed_p
)
903 if (! query (_("The target may not be able to correctly handle a %s\n"
904 "of %ld bytes. Change the packet size? "),
906 error (_("Packet size not changed."));
908 /* Update the config. */
909 config
->fixed_p
= fixed_p
;
914 show_memory_packet_size (struct memory_packet_config
*config
)
916 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
918 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
919 get_memory_packet_size (config
));
921 printf_filtered (_("Packets are limited to %ld bytes.\n"),
922 get_memory_packet_size (config
));
925 static struct memory_packet_config memory_write_packet_config
=
927 "memory-write-packet-size",
931 set_memory_write_packet_size (char *args
, int from_tty
)
933 set_memory_packet_size (args
, &memory_write_packet_config
);
937 show_memory_write_packet_size (char *args
, int from_tty
)
939 show_memory_packet_size (&memory_write_packet_config
);
943 get_memory_write_packet_size (void)
945 return get_memory_packet_size (&memory_write_packet_config
);
948 static struct memory_packet_config memory_read_packet_config
=
950 "memory-read-packet-size",
954 set_memory_read_packet_size (char *args
, int from_tty
)
956 set_memory_packet_size (args
, &memory_read_packet_config
);
960 show_memory_read_packet_size (char *args
, int from_tty
)
962 show_memory_packet_size (&memory_read_packet_config
);
966 get_memory_read_packet_size (void)
968 long size
= get_memory_packet_size (&memory_read_packet_config
);
970 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
971 extra buffer size argument before the memory read size can be
972 increased beyond this. */
973 if (size
> get_remote_packet_size ())
974 size
= get_remote_packet_size ();
979 /* Generic configuration support for packets the stub optionally
980 supports. Allows the user to specify the use of the packet as well
981 as allowing GDB to auto-detect support in the remote stub. */
985 PACKET_SUPPORT_UNKNOWN
= 0,
994 enum auto_boolean detect
;
995 enum packet_support support
;
998 /* Analyze a packet's return value and update the packet config
1009 update_packet_config (struct packet_config
*config
)
1011 switch (config
->detect
)
1013 case AUTO_BOOLEAN_TRUE
:
1014 config
->support
= PACKET_ENABLE
;
1016 case AUTO_BOOLEAN_FALSE
:
1017 config
->support
= PACKET_DISABLE
;
1019 case AUTO_BOOLEAN_AUTO
:
1020 config
->support
= PACKET_SUPPORT_UNKNOWN
;
1026 show_packet_config_cmd (struct packet_config
*config
)
1028 char *support
= "internal-error";
1030 switch (config
->support
)
1033 support
= "enabled";
1035 case PACKET_DISABLE
:
1036 support
= "disabled";
1038 case PACKET_SUPPORT_UNKNOWN
:
1039 support
= "unknown";
1042 switch (config
->detect
)
1044 case AUTO_BOOLEAN_AUTO
:
1045 printf_filtered (_("Support for the `%s' packet "
1046 "is auto-detected, currently %s.\n"),
1047 config
->name
, support
);
1049 case AUTO_BOOLEAN_TRUE
:
1050 case AUTO_BOOLEAN_FALSE
:
1051 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1052 config
->name
, support
);
1058 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1059 const char *title
, int legacy
)
1065 config
->name
= name
;
1066 config
->title
= title
;
1067 config
->detect
= AUTO_BOOLEAN_AUTO
;
1068 config
->support
= PACKET_SUPPORT_UNKNOWN
;
1069 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1071 show_doc
= xstrprintf ("Show current use of remote "
1072 "protocol `%s' (%s) packet",
1074 /* set/show TITLE-packet {auto,on,off} */
1075 cmd_name
= xstrprintf ("%s-packet", title
);
1076 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1077 &config
->detect
, set_doc
,
1078 show_doc
, NULL
, /* help_doc */
1079 set_remote_protocol_packet_cmd
,
1080 show_remote_protocol_packet_cmd
,
1081 &remote_set_cmdlist
, &remote_show_cmdlist
);
1082 /* The command code copies the documentation strings. */
1085 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1090 legacy_name
= xstrprintf ("%s-packet", name
);
1091 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1092 &remote_set_cmdlist
);
1093 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1094 &remote_show_cmdlist
);
1098 static enum packet_result
1099 packet_check_result (const char *buf
)
1103 /* The stub recognized the packet request. Check that the
1104 operation succeeded. */
1106 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1108 /* "Enn" - definitly an error. */
1109 return PACKET_ERROR
;
1111 /* Always treat "E." as an error. This will be used for
1112 more verbose error messages, such as E.memtypes. */
1113 if (buf
[0] == 'E' && buf
[1] == '.')
1114 return PACKET_ERROR
;
1116 /* The packet may or may not be OK. Just assume it is. */
1120 /* The stub does not support the packet. */
1121 return PACKET_UNKNOWN
;
1124 static enum packet_result
1125 packet_ok (const char *buf
, struct packet_config
*config
)
1127 enum packet_result result
;
1129 result
= packet_check_result (buf
);
1134 /* The stub recognized the packet request. */
1135 switch (config
->support
)
1137 case PACKET_SUPPORT_UNKNOWN
:
1139 fprintf_unfiltered (gdb_stdlog
,
1140 "Packet %s (%s) is supported\n",
1141 config
->name
, config
->title
);
1142 config
->support
= PACKET_ENABLE
;
1144 case PACKET_DISABLE
:
1145 internal_error (__FILE__
, __LINE__
,
1146 _("packet_ok: attempt to use a disabled packet"));
1152 case PACKET_UNKNOWN
:
1153 /* The stub does not support the packet. */
1154 switch (config
->support
)
1157 if (config
->detect
== AUTO_BOOLEAN_AUTO
)
1158 /* If the stub previously indicated that the packet was
1159 supported then there is a protocol error.. */
1160 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1161 config
->name
, config
->title
);
1163 /* The user set it wrong. */
1164 error (_("Enabled packet %s (%s) not recognized by stub"),
1165 config
->name
, config
->title
);
1167 case PACKET_SUPPORT_UNKNOWN
:
1169 fprintf_unfiltered (gdb_stdlog
,
1170 "Packet %s (%s) is NOT supported\n",
1171 config
->name
, config
->title
);
1172 config
->support
= PACKET_DISABLE
;
1174 case PACKET_DISABLE
:
1196 PACKET_vFile_pwrite
,
1198 PACKET_vFile_unlink
,
1200 PACKET_qXfer_features
,
1201 PACKET_qXfer_libraries
,
1202 PACKET_qXfer_memory_map
,
1203 PACKET_qXfer_spu_read
,
1204 PACKET_qXfer_spu_write
,
1205 PACKET_qXfer_osdata
,
1206 PACKET_qXfer_threads
,
1207 PACKET_qXfer_statictrace_read
,
1208 PACKET_qXfer_traceframe_info
,
1212 PACKET_QPassSignals
,
1213 PACKET_qSearch_memory
,
1216 PACKET_QStartNoAckMode
,
1218 PACKET_qXfer_siginfo_read
,
1219 PACKET_qXfer_siginfo_write
,
1221 PACKET_ConditionalTracepoints
,
1222 PACKET_FastTracepoints
,
1223 PACKET_StaticTracepoints
,
1226 PACKET_TracepointSource
,
1231 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
1234 set_remote_protocol_packet_cmd (char *args
, int from_tty
,
1235 struct cmd_list_element
*c
)
1237 struct packet_config
*packet
;
1239 for (packet
= remote_protocol_packets
;
1240 packet
< &remote_protocol_packets
[PACKET_MAX
];
1243 if (&packet
->detect
== c
->var
)
1245 update_packet_config (packet
);
1249 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
1254 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
1255 struct cmd_list_element
*c
,
1258 struct packet_config
*packet
;
1260 for (packet
= remote_protocol_packets
;
1261 packet
< &remote_protocol_packets
[PACKET_MAX
];
1264 if (&packet
->detect
== c
->var
)
1266 show_packet_config_cmd (packet
);
1270 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
1274 /* Should we try one of the 'Z' requests? */
1278 Z_PACKET_SOFTWARE_BP
,
1279 Z_PACKET_HARDWARE_BP
,
1286 /* For compatibility with older distributions. Provide a ``set remote
1287 Z-packet ...'' command that updates all the Z packet types. */
1289 static enum auto_boolean remote_Z_packet_detect
;
1292 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
1293 struct cmd_list_element
*c
)
1297 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1299 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
1300 update_packet_config (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1305 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
1306 struct cmd_list_element
*c
,
1311 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1313 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1317 /* Should we try the 'ThreadInfo' query packet?
1319 This variable (NOT available to the user: auto-detect only!)
1320 determines whether GDB will use the new, simpler "ThreadInfo"
1321 query or the older, more complex syntax for thread queries.
1322 This is an auto-detect variable (set to true at each connect,
1323 and set to false when the target fails to recognize it). */
1325 static int use_threadinfo_query
;
1326 static int use_threadextra_query
;
1328 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1329 static struct async_signal_handler
*sigint_remote_twice_token
;
1330 static struct async_signal_handler
*sigint_remote_token
;
1333 /* Asynchronous signal handle registered as event loop source for
1334 when we have pending events ready to be passed to the core. */
1336 static struct async_event_handler
*remote_async_inferior_event_token
;
1338 /* Asynchronous signal handle registered as event loop source for when
1339 the remote sent us a %Stop notification. The registered callback
1340 will do a vStopped sequence to pull the rest of the events out of
1341 the remote side into our event queue. */
1343 static struct async_event_handler
*remote_async_get_pending_events_token
;
1346 static ptid_t magic_null_ptid
;
1347 static ptid_t not_sent_ptid
;
1348 static ptid_t any_thread_ptid
;
1350 /* These are the threads which we last sent to the remote system. The
1351 TID member will be -1 for all or -2 for not sent yet. */
1353 static ptid_t general_thread
;
1354 static ptid_t continue_thread
;
1356 /* This the traceframe which we last selected on the remote system.
1357 It will be -1 if no traceframe is selected. */
1358 static int remote_traceframe_number
= -1;
1360 /* Find out if the stub attached to PID (and hence GDB should offer to
1361 detach instead of killing it when bailing out). */
1364 remote_query_attached (int pid
)
1366 struct remote_state
*rs
= get_remote_state ();
1368 if (remote_protocol_packets
[PACKET_qAttached
].support
== PACKET_DISABLE
)
1371 if (remote_multi_process_p (rs
))
1372 sprintf (rs
->buf
, "qAttached:%x", pid
);
1374 sprintf (rs
->buf
, "qAttached");
1377 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1379 switch (packet_ok (rs
->buf
,
1380 &remote_protocol_packets
[PACKET_qAttached
]))
1383 if (strcmp (rs
->buf
, "1") == 0)
1387 warning (_("Remote failure reply: %s"), rs
->buf
);
1389 case PACKET_UNKNOWN
:
1396 /* Add PID to GDB's inferior table. Since we can be connected to a
1397 remote system before before knowing about any inferior, mark the
1398 target with execution when we find the first inferior. If ATTACHED
1399 is 1, then we had just attached to this inferior. If it is 0, then
1400 we just created this inferior. If it is -1, then try querying the
1401 remote stub to find out if it had attached to the inferior or
1404 static struct inferior
*
1405 remote_add_inferior (int pid
, int attached
)
1407 struct inferior
*inf
;
1409 /* Check whether this process we're learning about is to be
1410 considered attached, or if is to be considered to have been
1411 spawned by the stub. */
1413 attached
= remote_query_attached (pid
);
1415 if (gdbarch_has_global_solist (target_gdbarch
))
1417 /* If the target shares code across all inferiors, then every
1418 attach adds a new inferior. */
1419 inf
= add_inferior (pid
);
1421 /* ... and every inferior is bound to the same program space.
1422 However, each inferior may still have its own address
1424 inf
->aspace
= maybe_new_address_space ();
1425 inf
->pspace
= current_program_space
;
1429 /* In the traditional debugging scenario, there's a 1-1 match
1430 between program/address spaces. We simply bind the inferior
1431 to the program space's address space. */
1432 inf
= current_inferior ();
1433 inferior_appeared (inf
, pid
);
1436 inf
->attach_flag
= attached
;
1441 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1442 according to RUNNING. */
1445 remote_add_thread (ptid_t ptid
, int running
)
1449 set_executing (ptid
, running
);
1450 set_running (ptid
, running
);
1453 /* Come here when we learn about a thread id from the remote target.
1454 It may be the first time we hear about such thread, so take the
1455 opportunity to add it to GDB's thread list. In case this is the
1456 first time we're noticing its corresponding inferior, add it to
1457 GDB's inferior list as well. */
1460 remote_notice_new_inferior (ptid_t currthread
, int running
)
1462 /* If this is a new thread, add it to GDB's thread list.
1463 If we leave it up to WFI to do this, bad things will happen. */
1465 if (in_thread_list (currthread
) && is_exited (currthread
))
1467 /* We're seeing an event on a thread id we knew had exited.
1468 This has to be a new thread reusing the old id. Add it. */
1469 remote_add_thread (currthread
, running
);
1473 if (!in_thread_list (currthread
))
1475 struct inferior
*inf
= NULL
;
1476 int pid
= ptid_get_pid (currthread
);
1478 if (ptid_is_pid (inferior_ptid
)
1479 && pid
== ptid_get_pid (inferior_ptid
))
1481 /* inferior_ptid has no thread member yet. This can happen
1482 with the vAttach -> remote_wait,"TAAthread:" path if the
1483 stub doesn't support qC. This is the first stop reported
1484 after an attach, so this is the main thread. Update the
1485 ptid in the thread list. */
1486 if (in_thread_list (pid_to_ptid (pid
)))
1487 thread_change_ptid (inferior_ptid
, currthread
);
1490 remote_add_thread (currthread
, running
);
1491 inferior_ptid
= currthread
;
1496 if (ptid_equal (magic_null_ptid
, inferior_ptid
))
1498 /* inferior_ptid is not set yet. This can happen with the
1499 vRun -> remote_wait,"TAAthread:" path if the stub
1500 doesn't support qC. This is the first stop reported
1501 after an attach, so this is the main thread. Update the
1502 ptid in the thread list. */
1503 thread_change_ptid (inferior_ptid
, currthread
);
1507 /* When connecting to a target remote, or to a target
1508 extended-remote which already was debugging an inferior, we
1509 may not know about it yet. Add it before adding its child
1510 thread, so notifications are emitted in a sensible order. */
1511 if (!in_inferior_list (ptid_get_pid (currthread
)))
1512 inf
= remote_add_inferior (ptid_get_pid (currthread
), -1);
1514 /* This is really a new thread. Add it. */
1515 remote_add_thread (currthread
, running
);
1517 /* If we found a new inferior, let the common code do whatever
1518 it needs to with it (e.g., read shared libraries, insert
1521 notice_new_inferior (currthread
, running
, 0);
1525 /* Return the private thread data, creating it if necessary. */
1527 struct private_thread_info
*
1528 demand_private_info (ptid_t ptid
)
1530 struct thread_info
*info
= find_thread_ptid (ptid
);
1536 info
->private = xmalloc (sizeof (*(info
->private)));
1537 info
->private_dtor
= free_private_thread_info
;
1538 info
->private->core
= -1;
1539 info
->private->extra
= 0;
1542 return info
->private;
1545 /* Call this function as a result of
1546 1) A halt indication (T packet) containing a thread id
1547 2) A direct query of currthread
1548 3) Successful execution of set thread */
1551 record_currthread (ptid_t currthread
)
1553 general_thread
= currthread
;
1556 static char *last_pass_packet
;
1558 /* If 'QPassSignals' is supported, tell the remote stub what signals
1559 it can simply pass through to the inferior without reporting. */
1562 remote_pass_signals (void)
1564 if (remote_protocol_packets
[PACKET_QPassSignals
].support
!= PACKET_DISABLE
)
1566 char *pass_packet
, *p
;
1567 int numsigs
= (int) TARGET_SIGNAL_LAST
;
1570 gdb_assert (numsigs
< 256);
1571 for (i
= 0; i
< numsigs
; i
++)
1573 if (signal_stop_state (i
) == 0
1574 && signal_print_state (i
) == 0
1575 && signal_pass_state (i
) == 1)
1578 pass_packet
= xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
1579 strcpy (pass_packet
, "QPassSignals:");
1580 p
= pass_packet
+ strlen (pass_packet
);
1581 for (i
= 0; i
< numsigs
; i
++)
1583 if (signal_stop_state (i
) == 0
1584 && signal_print_state (i
) == 0
1585 && signal_pass_state (i
) == 1)
1588 *p
++ = tohex (i
>> 4);
1589 *p
++ = tohex (i
& 15);
1598 if (!last_pass_packet
|| strcmp (last_pass_packet
, pass_packet
))
1600 struct remote_state
*rs
= get_remote_state ();
1601 char *buf
= rs
->buf
;
1603 putpkt (pass_packet
);
1604 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1605 packet_ok (buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
1606 if (last_pass_packet
)
1607 xfree (last_pass_packet
);
1608 last_pass_packet
= pass_packet
;
1611 xfree (pass_packet
);
1616 remote_notice_signals (ptid_t ptid
)
1618 /* Update the remote on signals to silently pass, if they've
1620 remote_pass_signals ();
1623 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
1624 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
1625 thread. If GEN is set, set the general thread, if not, then set
1626 the step/continue thread. */
1628 set_thread (struct ptid ptid
, int gen
)
1630 struct remote_state
*rs
= get_remote_state ();
1631 ptid_t state
= gen
? general_thread
: continue_thread
;
1632 char *buf
= rs
->buf
;
1633 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
1635 if (ptid_equal (state
, ptid
))
1639 *buf
++ = gen
? 'g' : 'c';
1640 if (ptid_equal (ptid
, magic_null_ptid
))
1641 xsnprintf (buf
, endbuf
- buf
, "0");
1642 else if (ptid_equal (ptid
, any_thread_ptid
))
1643 xsnprintf (buf
, endbuf
- buf
, "0");
1644 else if (ptid_equal (ptid
, minus_one_ptid
))
1645 xsnprintf (buf
, endbuf
- buf
, "-1");
1647 write_ptid (buf
, endbuf
, ptid
);
1649 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1651 general_thread
= ptid
;
1653 continue_thread
= ptid
;
1657 set_general_thread (struct ptid ptid
)
1659 set_thread (ptid
, 1);
1663 set_continue_thread (struct ptid ptid
)
1665 set_thread (ptid
, 0);
1668 /* Change the remote current process. Which thread within the process
1669 ends up selected isn't important, as long as it is the same process
1670 as what INFERIOR_PTID points to.
1672 This comes from that fact that there is no explicit notion of
1673 "selected process" in the protocol. The selected process for
1674 general operations is the process the selected general thread
1678 set_general_process (void)
1680 struct remote_state
*rs
= get_remote_state ();
1682 /* If the remote can't handle multiple processes, don't bother. */
1683 if (!remote_multi_process_p (rs
))
1686 /* We only need to change the remote current thread if it's pointing
1687 at some other process. */
1688 if (ptid_get_pid (general_thread
) != ptid_get_pid (inferior_ptid
))
1689 set_general_thread (inferior_ptid
);
1693 /* Return nonzero if the thread PTID is still alive on the remote
1697 remote_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
1699 struct remote_state
*rs
= get_remote_state ();
1702 if (ptid_equal (ptid
, magic_null_ptid
))
1703 /* The main thread is always alive. */
1706 if (ptid_get_pid (ptid
) != 0 && ptid_get_tid (ptid
) == 0)
1707 /* The main thread is always alive. This can happen after a
1708 vAttach, if the remote side doesn't support
1713 endp
= rs
->buf
+ get_remote_packet_size ();
1716 write_ptid (p
, endp
, ptid
);
1719 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1720 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
1723 /* About these extended threadlist and threadinfo packets. They are
1724 variable length packets but, the fields within them are often fixed
1725 length. They are redundent enough to send over UDP as is the
1726 remote protocol in general. There is a matching unit test module
1729 #define OPAQUETHREADBYTES 8
1731 /* a 64 bit opaque identifier */
1732 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
1734 /* WARNING: This threadref data structure comes from the remote O.S.,
1735 libstub protocol encoding, and remote.c. It is not particularly
1738 /* Right now, the internal structure is int. We want it to be bigger.
1739 Plan to fix this. */
1741 typedef int gdb_threadref
; /* Internal GDB thread reference. */
1743 /* gdb_ext_thread_info is an internal GDB data structure which is
1744 equivalent to the reply of the remote threadinfo packet. */
1746 struct gdb_ext_thread_info
1748 threadref threadid
; /* External form of thread reference. */
1749 int active
; /* Has state interesting to GDB?
1751 char display
[256]; /* Brief state display, name,
1752 blocked/suspended. */
1753 char shortname
[32]; /* To be used to name threads. */
1754 char more_display
[256]; /* Long info, statistics, queue depth,
1758 /* The volume of remote transfers can be limited by submitting
1759 a mask containing bits specifying the desired information.
1760 Use a union of these values as the 'selection' parameter to
1761 get_thread_info. FIXME: Make these TAG names more thread specific. */
1763 #define TAG_THREADID 1
1764 #define TAG_EXISTS 2
1765 #define TAG_DISPLAY 4
1766 #define TAG_THREADNAME 8
1767 #define TAG_MOREDISPLAY 16
1769 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1771 char *unpack_varlen_hex (char *buff
, ULONGEST
*result
);
1773 static char *unpack_nibble (char *buf
, int *val
);
1775 static char *pack_nibble (char *buf
, int nibble
);
1777 static char *pack_hex_byte (char *pkt
, int /* unsigned char */ byte
);
1779 static char *unpack_byte (char *buf
, int *value
);
1781 static char *pack_int (char *buf
, int value
);
1783 static char *unpack_int (char *buf
, int *value
);
1785 static char *unpack_string (char *src
, char *dest
, int length
);
1787 static char *pack_threadid (char *pkt
, threadref
*id
);
1789 static char *unpack_threadid (char *inbuf
, threadref
*id
);
1791 void int_to_threadref (threadref
*id
, int value
);
1793 static int threadref_to_int (threadref
*ref
);
1795 static void copy_threadref (threadref
*dest
, threadref
*src
);
1797 static int threadmatch (threadref
*dest
, threadref
*src
);
1799 static char *pack_threadinfo_request (char *pkt
, int mode
,
1802 static int remote_unpack_thread_info_response (char *pkt
,
1803 threadref
*expectedref
,
1804 struct gdb_ext_thread_info
1808 static int remote_get_threadinfo (threadref
*threadid
,
1809 int fieldset
, /*TAG mask */
1810 struct gdb_ext_thread_info
*info
);
1812 static char *pack_threadlist_request (char *pkt
, int startflag
,
1814 threadref
*nextthread
);
1816 static int parse_threadlist_response (char *pkt
,
1818 threadref
*original_echo
,
1819 threadref
*resultlist
,
1822 static int remote_get_threadlist (int startflag
,
1823 threadref
*nextthread
,
1827 threadref
*threadlist
);
1829 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
1831 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
1832 void *context
, int looplimit
);
1834 static int remote_newthread_step (threadref
*ref
, void *context
);
1837 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
1838 buffer we're allowed to write to. Returns
1839 BUF+CHARACTERS_WRITTEN. */
1842 write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
1845 struct remote_state
*rs
= get_remote_state ();
1847 if (remote_multi_process_p (rs
))
1849 pid
= ptid_get_pid (ptid
);
1851 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
1853 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
1855 tid
= ptid_get_tid (ptid
);
1857 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
1859 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
1864 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
1865 passed the last parsed char. Returns null_ptid on error. */
1868 read_ptid (char *buf
, char **obuf
)
1872 ULONGEST pid
= 0, tid
= 0;
1876 /* Multi-process ptid. */
1877 pp
= unpack_varlen_hex (p
+ 1, &pid
);
1879 error (_("invalid remote ptid: %s"), p
);
1882 pp
= unpack_varlen_hex (p
+ 1, &tid
);
1885 return ptid_build (pid
, 0, tid
);
1888 /* No multi-process. Just a tid. */
1889 pp
= unpack_varlen_hex (p
, &tid
);
1891 /* Since the stub is not sending a process id, then default to
1892 what's in inferior_ptid, unless it's null at this point. If so,
1893 then since there's no way to know the pid of the reported
1894 threads, use the magic number. */
1895 if (ptid_equal (inferior_ptid
, null_ptid
))
1896 pid
= ptid_get_pid (magic_null_ptid
);
1898 pid
= ptid_get_pid (inferior_ptid
);
1902 return ptid_build (pid
, 0, tid
);
1905 /* Encode 64 bits in 16 chars of hex. */
1907 static const char hexchars
[] = "0123456789abcdef";
1910 ishex (int ch
, int *val
)
1912 if ((ch
>= 'a') && (ch
<= 'f'))
1914 *val
= ch
- 'a' + 10;
1917 if ((ch
>= 'A') && (ch
<= 'F'))
1919 *val
= ch
- 'A' + 10;
1922 if ((ch
>= '0') && (ch
<= '9'))
1933 if (ch
>= 'a' && ch
<= 'f')
1934 return ch
- 'a' + 10;
1935 if (ch
>= '0' && ch
<= '9')
1937 if (ch
>= 'A' && ch
<= 'F')
1938 return ch
- 'A' + 10;
1943 stub_unpack_int (char *buff
, int fieldlength
)
1950 nibble
= stubhex (*buff
++);
1954 retval
= retval
<< 4;
1960 unpack_varlen_hex (char *buff
, /* packet to parse */
1964 ULONGEST retval
= 0;
1966 while (ishex (*buff
, &nibble
))
1969 retval
= retval
<< 4;
1970 retval
|= nibble
& 0x0f;
1977 unpack_nibble (char *buf
, int *val
)
1979 *val
= fromhex (*buf
++);
1984 pack_nibble (char *buf
, int nibble
)
1986 *buf
++ = hexchars
[(nibble
& 0x0f)];
1991 pack_hex_byte (char *pkt
, int byte
)
1993 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
1994 *pkt
++ = hexchars
[(byte
& 0xf)];
1999 unpack_byte (char *buf
, int *value
)
2001 *value
= stub_unpack_int (buf
, 2);
2006 pack_int (char *buf
, int value
)
2008 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
2009 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
2010 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
2011 buf
= pack_hex_byte (buf
, (value
& 0xff));
2016 unpack_int (char *buf
, int *value
)
2018 *value
= stub_unpack_int (buf
, 8);
2022 #if 0 /* Currently unused, uncomment when needed. */
2023 static char *pack_string (char *pkt
, char *string
);
2026 pack_string (char *pkt
, char *string
)
2031 len
= strlen (string
);
2033 len
= 200; /* Bigger than most GDB packets, junk??? */
2034 pkt
= pack_hex_byte (pkt
, len
);
2038 if ((ch
== '\0') || (ch
== '#'))
2039 ch
= '*'; /* Protect encapsulation. */
2044 #endif /* 0 (unused) */
2047 unpack_string (char *src
, char *dest
, int length
)
2056 pack_threadid (char *pkt
, threadref
*id
)
2059 unsigned char *altid
;
2061 altid
= (unsigned char *) id
;
2062 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
2064 pkt
= pack_hex_byte (pkt
, *altid
++);
2070 unpack_threadid (char *inbuf
, threadref
*id
)
2073 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
2076 altref
= (char *) id
;
2078 while (inbuf
< limit
)
2080 x
= stubhex (*inbuf
++);
2081 y
= stubhex (*inbuf
++);
2082 *altref
++ = (x
<< 4) | y
;
2087 /* Externally, threadrefs are 64 bits but internally, they are still
2088 ints. This is due to a mismatch of specifications. We would like
2089 to use 64bit thread references internally. This is an adapter
2093 int_to_threadref (threadref
*id
, int value
)
2095 unsigned char *scan
;
2097 scan
= (unsigned char *) id
;
2103 *scan
++ = (value
>> 24) & 0xff;
2104 *scan
++ = (value
>> 16) & 0xff;
2105 *scan
++ = (value
>> 8) & 0xff;
2106 *scan
++ = (value
& 0xff);
2110 threadref_to_int (threadref
*ref
)
2113 unsigned char *scan
;
2119 value
= (value
<< 8) | ((*scan
++) & 0xff);
2124 copy_threadref (threadref
*dest
, threadref
*src
)
2127 unsigned char *csrc
, *cdest
;
2129 csrc
= (unsigned char *) src
;
2130 cdest
= (unsigned char *) dest
;
2137 threadmatch (threadref
*dest
, threadref
*src
)
2139 /* Things are broken right now, so just assume we got a match. */
2141 unsigned char *srcp
, *destp
;
2143 srcp
= (char *) src
;
2144 destp
= (char *) dest
;
2148 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
2155 threadid:1, # always request threadid
2162 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2165 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
2167 *pkt
++ = 'q'; /* Info Query */
2168 *pkt
++ = 'P'; /* process or thread info */
2169 pkt
= pack_int (pkt
, mode
); /* mode */
2170 pkt
= pack_threadid (pkt
, id
); /* threadid */
2171 *pkt
= '\0'; /* terminate */
2175 /* These values tag the fields in a thread info response packet. */
2176 /* Tagging the fields allows us to request specific fields and to
2177 add more fields as time goes by. */
2179 #define TAG_THREADID 1 /* Echo the thread identifier. */
2180 #define TAG_EXISTS 2 /* Is this process defined enough to
2181 fetch registers and its stack? */
2182 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2183 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2184 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2188 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
2189 struct gdb_ext_thread_info
*info
)
2191 struct remote_state
*rs
= get_remote_state ();
2195 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
2198 /* info->threadid = 0; FIXME: implement zero_threadref. */
2200 info
->display
[0] = '\0';
2201 info
->shortname
[0] = '\0';
2202 info
->more_display
[0] = '\0';
2204 /* Assume the characters indicating the packet type have been
2206 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
2207 pkt
= unpack_threadid (pkt
, &ref
);
2210 warning (_("Incomplete response to threadinfo request."));
2211 if (!threadmatch (&ref
, expectedref
))
2212 { /* This is an answer to a different request. */
2213 warning (_("ERROR RMT Thread info mismatch."));
2216 copy_threadref (&info
->threadid
, &ref
);
2218 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2220 /* Packets are terminated with nulls. */
2221 while ((pkt
< limit
) && mask
&& *pkt
)
2223 pkt
= unpack_int (pkt
, &tag
); /* tag */
2224 pkt
= unpack_byte (pkt
, &length
); /* length */
2225 if (!(tag
& mask
)) /* Tags out of synch with mask. */
2227 warning (_("ERROR RMT: threadinfo tag mismatch."));
2231 if (tag
== TAG_THREADID
)
2235 warning (_("ERROR RMT: length of threadid is not 16."));
2239 pkt
= unpack_threadid (pkt
, &ref
);
2240 mask
= mask
& ~TAG_THREADID
;
2243 if (tag
== TAG_EXISTS
)
2245 info
->active
= stub_unpack_int (pkt
, length
);
2247 mask
= mask
& ~(TAG_EXISTS
);
2250 warning (_("ERROR RMT: 'exists' length too long."));
2256 if (tag
== TAG_THREADNAME
)
2258 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
2259 mask
= mask
& ~TAG_THREADNAME
;
2262 if (tag
== TAG_DISPLAY
)
2264 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
2265 mask
= mask
& ~TAG_DISPLAY
;
2268 if (tag
== TAG_MOREDISPLAY
)
2270 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
2271 mask
= mask
& ~TAG_MOREDISPLAY
;
2274 warning (_("ERROR RMT: unknown thread info tag."));
2275 break; /* Not a tag we know about. */
2281 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
2282 struct gdb_ext_thread_info
*info
)
2284 struct remote_state
*rs
= get_remote_state ();
2287 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
2289 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2291 if (rs
->buf
[0] == '\0')
2294 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
2299 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2302 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
2303 threadref
*nextthread
)
2305 *pkt
++ = 'q'; /* info query packet */
2306 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
2307 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
2308 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
2309 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
2314 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2317 parse_threadlist_response (char *pkt
, int result_limit
,
2318 threadref
*original_echo
, threadref
*resultlist
,
2321 struct remote_state
*rs
= get_remote_state ();
2323 int count
, resultcount
, done
;
2326 /* Assume the 'q' and 'M chars have been stripped. */
2327 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
2328 /* done parse past here */
2329 pkt
= unpack_byte (pkt
, &count
); /* count field */
2330 pkt
= unpack_nibble (pkt
, &done
);
2331 /* The first threadid is the argument threadid. */
2332 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
2333 while ((count
-- > 0) && (pkt
< limit
))
2335 pkt
= unpack_threadid (pkt
, resultlist
++);
2336 if (resultcount
++ >= result_limit
)
2345 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
2346 int *done
, int *result_count
, threadref
*threadlist
)
2348 struct remote_state
*rs
= get_remote_state ();
2349 static threadref echo_nextthread
;
2352 /* Trancate result limit to be smaller than the packet size. */
2353 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
2354 >= get_remote_packet_size ())
2355 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
2357 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
2359 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2361 if (*rs
->buf
== '\0')
2365 parse_threadlist_response (rs
->buf
+ 2, result_limit
, &echo_nextthread
,
2368 if (!threadmatch (&echo_nextthread
, nextthread
))
2370 /* FIXME: This is a good reason to drop the packet. */
2371 /* Possably, there is a duplicate response. */
2373 retransmit immediatly - race conditions
2374 retransmit after timeout - yes
2376 wait for packet, then exit
2378 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2379 return 0; /* I choose simply exiting. */
2381 if (*result_count
<= 0)
2385 warning (_("RMT ERROR : failed to get remote thread list."));
2388 return result
; /* break; */
2390 if (*result_count
> result_limit
)
2393 warning (_("RMT ERROR: threadlist response longer than requested."));
2399 /* This is the interface between remote and threads, remotes upper
2402 /* remote_find_new_threads retrieves the thread list and for each
2403 thread in the list, looks up the thread in GDB's internal list,
2404 adding the thread if it does not already exist. This involves
2405 getting partial thread lists from the remote target so, polling the
2406 quit_flag is required. */
2409 /* About this many threadisds fit in a packet. */
2411 #define MAXTHREADLISTRESULTS 32
2414 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
2417 int done
, i
, result_count
;
2421 static threadref nextthread
;
2422 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
2427 if (loopcount
++ > looplimit
)
2430 warning (_("Remote fetch threadlist -infinite loop-."));
2433 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
2434 &done
, &result_count
, resultthreadlist
))
2439 /* Clear for later iterations. */
2441 /* Setup to resume next batch of thread references, set nextthread. */
2442 if (result_count
>= 1)
2443 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
2445 while (result_count
--)
2446 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
2453 remote_newthread_step (threadref
*ref
, void *context
)
2455 int pid
= ptid_get_pid (inferior_ptid
);
2456 ptid_t ptid
= ptid_build (pid
, 0, threadref_to_int (ref
));
2458 if (!in_thread_list (ptid
))
2460 return 1; /* continue iterator */
2463 #define CRAZY_MAX_THREADS 1000
2466 remote_current_thread (ptid_t oldpid
)
2468 struct remote_state
*rs
= get_remote_state ();
2471 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2472 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
2473 return read_ptid (&rs
->buf
[2], NULL
);
2478 /* Find new threads for info threads command.
2479 * Original version, using John Metzler's thread protocol.
2483 remote_find_new_threads (void)
2485 remote_threadlist_iterator (remote_newthread_step
, 0,
2489 #if defined(HAVE_LIBEXPAT)
2491 typedef struct thread_item
2497 DEF_VEC_O(thread_item_t
);
2499 struct threads_parsing_context
2501 VEC (thread_item_t
) *items
;
2505 start_thread (struct gdb_xml_parser
*parser
,
2506 const struct gdb_xml_element
*element
,
2507 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
2509 struct threads_parsing_context
*data
= user_data
;
2511 struct thread_item item
;
2513 struct gdb_xml_value
*attr
;
2515 id
= xml_find_attribute (attributes
, "id")->value
;
2516 item
.ptid
= read_ptid (id
, NULL
);
2518 attr
= xml_find_attribute (attributes
, "core");
2520 item
.core
= *(ULONGEST
*) attr
->value
;
2526 VEC_safe_push (thread_item_t
, data
->items
, &item
);
2530 end_thread (struct gdb_xml_parser
*parser
,
2531 const struct gdb_xml_element
*element
,
2532 void *user_data
, const char *body_text
)
2534 struct threads_parsing_context
*data
= user_data
;
2536 if (body_text
&& *body_text
)
2537 VEC_last (thread_item_t
, data
->items
)->extra
= xstrdup (body_text
);
2540 const struct gdb_xml_attribute thread_attributes
[] = {
2541 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
2542 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
2543 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
2546 const struct gdb_xml_element thread_children
[] = {
2547 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
2550 const struct gdb_xml_element threads_children
[] = {
2551 { "thread", thread_attributes
, thread_children
,
2552 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
2553 start_thread
, end_thread
},
2554 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
2557 const struct gdb_xml_element threads_elements
[] = {
2558 { "threads", NULL
, threads_children
,
2559 GDB_XML_EF_NONE
, NULL
, NULL
},
2560 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
2563 /* Discard the contents of the constructed thread info context. */
2566 clear_threads_parsing_context (void *p
)
2568 struct threads_parsing_context
*context
= p
;
2570 struct thread_item
*item
;
2572 for (i
= 0; VEC_iterate (thread_item_t
, context
->items
, i
, item
); ++i
)
2573 xfree (item
->extra
);
2575 VEC_free (thread_item_t
, context
->items
);
2581 * Find all threads for info threads command.
2582 * Uses new thread protocol contributed by Cisco.
2583 * Falls back and attempts to use the older method (above)
2584 * if the target doesn't respond to the new method.
2588 remote_threads_info (struct target_ops
*ops
)
2590 struct remote_state
*rs
= get_remote_state ();
2594 if (remote_desc
== 0) /* paranoia */
2595 error (_("Command can only be used when connected to the remote target."));
2597 #if defined(HAVE_LIBEXPAT)
2598 if (remote_protocol_packets
[PACKET_qXfer_threads
].support
== PACKET_ENABLE
)
2600 char *xml
= target_read_stralloc (¤t_target
,
2601 TARGET_OBJECT_THREADS
, NULL
);
2603 struct cleanup
*back_to
= make_cleanup (xfree
, xml
);
2607 struct threads_parsing_context context
;
2609 context
.items
= NULL
;
2610 make_cleanup (clear_threads_parsing_context
, &context
);
2612 if (gdb_xml_parse_quick (_("threads"), "threads.dtd",
2613 threads_elements
, xml
, &context
) == 0)
2616 struct thread_item
*item
;
2619 VEC_iterate (thread_item_t
, context
.items
, i
, item
);
2622 if (!ptid_equal (item
->ptid
, null_ptid
))
2624 struct private_thread_info
*info
;
2625 /* In non-stop mode, we assume new found threads
2626 are running until proven otherwise with a
2627 stop reply. In all-stop, we can only get
2628 here if all threads are stopped. */
2629 int running
= non_stop
? 1 : 0;
2631 remote_notice_new_inferior (item
->ptid
, running
);
2633 info
= demand_private_info (item
->ptid
);
2634 info
->core
= item
->core
;
2635 info
->extra
= item
->extra
;
2642 do_cleanups (back_to
);
2647 if (use_threadinfo_query
)
2649 putpkt ("qfThreadInfo");
2650 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2652 if (bufp
[0] != '\0') /* q packet recognized */
2654 while (*bufp
++ == 'm') /* reply contains one or more TID */
2658 new_thread
= read_ptid (bufp
, &bufp
);
2659 if (!ptid_equal (new_thread
, null_ptid
))
2661 /* In non-stop mode, we assume new found threads
2662 are running until proven otherwise with a
2663 stop reply. In all-stop, we can only get
2664 here if all threads are stopped. */
2665 int running
= non_stop
? 1 : 0;
2667 remote_notice_new_inferior (new_thread
, running
);
2670 while (*bufp
++ == ','); /* comma-separated list */
2671 putpkt ("qsThreadInfo");
2672 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2679 /* Only qfThreadInfo is supported in non-stop mode. */
2683 /* Else fall back to old method based on jmetzler protocol. */
2684 use_threadinfo_query
= 0;
2685 remote_find_new_threads ();
2690 * Collect a descriptive string about the given thread.
2691 * The target may say anything it wants to about the thread
2692 * (typically info about its blocked / runnable state, name, etc.).
2693 * This string will appear in the info threads display.
2695 * Optional: targets are not required to implement this function.
2699 remote_threads_extra_info (struct thread_info
*tp
)
2701 struct remote_state
*rs
= get_remote_state ();
2705 struct gdb_ext_thread_info threadinfo
;
2706 static char display_buf
[100]; /* arbitrary... */
2707 int n
= 0; /* position in display_buf */
2709 if (remote_desc
== 0) /* paranoia */
2710 internal_error (__FILE__
, __LINE__
,
2711 _("remote_threads_extra_info"));
2713 if (ptid_equal (tp
->ptid
, magic_null_ptid
)
2714 || (ptid_get_pid (tp
->ptid
) != 0 && ptid_get_tid (tp
->ptid
) == 0))
2715 /* This is the main thread which was added by GDB. The remote
2716 server doesn't know about it. */
2719 if (remote_protocol_packets
[PACKET_qXfer_threads
].support
== PACKET_ENABLE
)
2721 struct thread_info
*info
= find_thread_ptid (tp
->ptid
);
2723 if (info
&& info
->private)
2724 return info
->private->extra
;
2729 if (use_threadextra_query
)
2732 char *endb
= rs
->buf
+ get_remote_packet_size ();
2734 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
2736 write_ptid (b
, endb
, tp
->ptid
);
2739 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2740 if (rs
->buf
[0] != 0)
2742 n
= min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
2743 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
2744 display_buf
[result
] = '\0';
2749 /* If the above query fails, fall back to the old method. */
2750 use_threadextra_query
= 0;
2751 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
2752 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
2753 int_to_threadref (&id
, ptid_get_tid (tp
->ptid
));
2754 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
2755 if (threadinfo
.active
)
2757 if (*threadinfo
.shortname
)
2758 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
2759 " Name: %s,", threadinfo
.shortname
);
2760 if (*threadinfo
.display
)
2761 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2762 " State: %s,", threadinfo
.display
);
2763 if (*threadinfo
.more_display
)
2764 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2765 " Priority: %s", threadinfo
.more_display
);
2769 /* For purely cosmetic reasons, clear up trailing commas. */
2770 if (',' == display_buf
[n
-1])
2771 display_buf
[n
-1] = ' ';
2780 remote_static_tracepoint_marker_at (CORE_ADDR addr
,
2781 struct static_tracepoint_marker
*marker
)
2783 struct remote_state
*rs
= get_remote_state ();
2786 sprintf (p
, "qTSTMat:");
2788 p
+= hexnumstr (p
, addr
);
2790 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2794 error (_("Remote failure reply: %s"), p
);
2798 parse_static_tracepoint_marker_definition (p
, &p
, marker
);
2806 free_current_marker (void *arg
)
2808 struct static_tracepoint_marker
**marker_p
= arg
;
2810 if (*marker_p
!= NULL
)
2812 release_static_tracepoint_marker (*marker_p
);
2819 static VEC(static_tracepoint_marker_p
) *
2820 remote_static_tracepoint_markers_by_strid (const char *strid
)
2822 struct remote_state
*rs
= get_remote_state ();
2823 VEC(static_tracepoint_marker_p
) *markers
= NULL
;
2824 struct static_tracepoint_marker
*marker
= NULL
;
2825 struct cleanup
*old_chain
;
2828 /* Ask for a first packet of static tracepoint marker
2831 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2834 error (_("Remote failure reply: %s"), p
);
2836 old_chain
= make_cleanup (free_current_marker
, &marker
);
2841 marker
= XCNEW (struct static_tracepoint_marker
);
2845 parse_static_tracepoint_marker_definition (p
, &p
, marker
);
2847 if (strid
== NULL
|| strcmp (strid
, marker
->str_id
) == 0)
2849 VEC_safe_push (static_tracepoint_marker_p
,
2855 release_static_tracepoint_marker (marker
);
2856 memset (marker
, 0, sizeof (*marker
));
2859 while (*p
++ == ','); /* comma-separated list */
2860 /* Ask for another packet of static tracepoint definition. */
2862 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2866 do_cleanups (old_chain
);
2871 /* Implement the to_get_ada_task_ptid function for the remote targets. */
2874 remote_get_ada_task_ptid (long lwp
, long thread
)
2876 return ptid_build (ptid_get_pid (inferior_ptid
), 0, lwp
);
2880 /* Restart the remote side; this is an extended protocol operation. */
2883 extended_remote_restart (void)
2885 struct remote_state
*rs
= get_remote_state ();
2887 /* Send the restart command; for reasons I don't understand the
2888 remote side really expects a number after the "R". */
2889 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
2892 remote_fileio_reset ();
2895 /* Clean up connection to a remote debugger. */
2898 remote_close (int quitting
)
2900 if (remote_desc
== NULL
)
2901 return; /* already closed */
2903 /* Make sure we leave stdin registered in the event loop, and we
2904 don't leave the async SIGINT signal handler installed. */
2905 remote_terminal_ours ();
2907 serial_close (remote_desc
);
2910 /* We don't have a connection to the remote stub anymore. Get rid
2911 of all the inferiors and their threads we were controlling.
2912 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
2913 will be unable to find the thread corresponding to (pid, 0, 0). */
2914 inferior_ptid
= null_ptid
;
2915 discard_all_inferiors ();
2917 /* We're no longer interested in any of these events. */
2918 discard_pending_stop_replies (-1);
2920 if (remote_async_inferior_event_token
)
2921 delete_async_event_handler (&remote_async_inferior_event_token
);
2922 if (remote_async_get_pending_events_token
)
2923 delete_async_event_handler (&remote_async_get_pending_events_token
);
2926 /* Query the remote side for the text, data and bss offsets. */
2931 struct remote_state
*rs
= get_remote_state ();
2934 int lose
, num_segments
= 0, do_sections
, do_segments
;
2935 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
2936 struct section_offsets
*offs
;
2937 struct symfile_segment_data
*data
;
2939 if (symfile_objfile
== NULL
)
2942 putpkt ("qOffsets");
2943 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2946 if (buf
[0] == '\000')
2947 return; /* Return silently. Stub doesn't support
2951 warning (_("Remote failure reply: %s"), buf
);
2955 /* Pick up each field in turn. This used to be done with scanf, but
2956 scanf will make trouble if CORE_ADDR size doesn't match
2957 conversion directives correctly. The following code will work
2958 with any size of CORE_ADDR. */
2959 text_addr
= data_addr
= bss_addr
= 0;
2963 if (strncmp (ptr
, "Text=", 5) == 0)
2966 /* Don't use strtol, could lose on big values. */
2967 while (*ptr
&& *ptr
!= ';')
2968 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2970 if (strncmp (ptr
, ";Data=", 6) == 0)
2973 while (*ptr
&& *ptr
!= ';')
2974 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2979 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
2982 while (*ptr
&& *ptr
!= ';')
2983 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
2985 if (bss_addr
!= data_addr
)
2986 warning (_("Target reported unsupported offsets: %s"), buf
);
2991 else if (strncmp (ptr
, "TextSeg=", 8) == 0)
2994 /* Don't use strtol, could lose on big values. */
2995 while (*ptr
&& *ptr
!= ';')
2996 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2999 if (strncmp (ptr
, ";DataSeg=", 9) == 0)
3002 while (*ptr
&& *ptr
!= ';')
3003 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3011 error (_("Malformed response to offset query, %s"), buf
);
3012 else if (*ptr
!= '\0')
3013 warning (_("Target reported unsupported offsets: %s"), buf
);
3015 offs
= ((struct section_offsets
*)
3016 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
3017 memcpy (offs
, symfile_objfile
->section_offsets
,
3018 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
3020 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
3021 do_segments
= (data
!= NULL
);
3022 do_sections
= num_segments
== 0;
3024 if (num_segments
> 0)
3026 segments
[0] = text_addr
;
3027 segments
[1] = data_addr
;
3029 /* If we have two segments, we can still try to relocate everything
3030 by assuming that the .text and .data offsets apply to the whole
3031 text and data segments. Convert the offsets given in the packet
3032 to base addresses for symfile_map_offsets_to_segments. */
3033 else if (data
&& data
->num_segments
== 2)
3035 segments
[0] = data
->segment_bases
[0] + text_addr
;
3036 segments
[1] = data
->segment_bases
[1] + data_addr
;
3039 /* If the object file has only one segment, assume that it is text
3040 rather than data; main programs with no writable data are rare,
3041 but programs with no code are useless. Of course the code might
3042 have ended up in the data segment... to detect that we would need
3043 the permissions here. */
3044 else if (data
&& data
->num_segments
== 1)
3046 segments
[0] = data
->segment_bases
[0] + text_addr
;
3049 /* There's no way to relocate by segment. */
3055 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
3056 offs
, num_segments
, segments
);
3058 if (ret
== 0 && !do_sections
)
3059 error (_("Can not handle qOffsets TextSeg "
3060 "response with this symbol file"));
3067 free_symfile_segment_data (data
);
3071 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
3073 /* This is a temporary kludge to force data and bss to use the
3074 same offsets because that's what nlmconv does now. The real
3075 solution requires changes to the stub and remote.c that I
3076 don't have time to do right now. */
3078 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
3079 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
3082 objfile_relocate (symfile_objfile
, offs
);
3085 /* Callback for iterate_over_threads. Set the STOP_REQUESTED flags in
3086 threads we know are stopped already. This is used during the
3087 initial remote connection in non-stop mode --- threads that are
3088 reported as already being stopped are left stopped. */
3091 set_stop_requested_callback (struct thread_info
*thread
, void *data
)
3093 /* If we have a stop reply for this thread, it must be stopped. */
3094 if (peek_stop_reply (thread
->ptid
))
3095 set_stop_requested (thread
->ptid
, 1);
3100 /* Send interrupt_sequence to remote target. */
3102 send_interrupt_sequence (void)
3104 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
3105 serial_write (remote_desc
, "\x03", 1);
3106 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
3107 serial_send_break (remote_desc
);
3108 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
3110 serial_send_break (remote_desc
);
3111 serial_write (remote_desc
, "g", 1);
3114 internal_error (__FILE__
, __LINE__
,
3115 _("Invalid value for interrupt_sequence_mode: %s."),
3116 interrupt_sequence_mode
);
3120 remote_start_remote (int from_tty
, struct target_ops
*target
, int extended_p
)
3122 struct remote_state
*rs
= get_remote_state ();
3123 struct packet_config
*noack_config
;
3124 char *wait_status
= NULL
;
3126 immediate_quit
++; /* Allow user to interrupt it. */
3128 /* Ack any packet which the remote side has already sent. */
3129 serial_write (remote_desc
, "+", 1);
3131 if (interrupt_on_connect
)
3132 send_interrupt_sequence ();
3134 /* The first packet we send to the target is the optional "supported
3135 packets" request. If the target can answer this, it will tell us
3136 which later probes to skip. */
3137 remote_query_supported ();
3139 /* If the stub wants to get a QAllow, compose one and send it. */
3140 if (remote_protocol_packets
[PACKET_QAllow
].support
!= PACKET_DISABLE
)
3141 remote_set_permissions ();
3143 /* Next, we possibly activate noack mode.
3145 If the QStartNoAckMode packet configuration is set to AUTO,
3146 enable noack mode if the stub reported a wish for it with
3149 If set to TRUE, then enable noack mode even if the stub didn't
3150 report it in qSupported. If the stub doesn't reply OK, the
3151 session ends with an error.
3153 If FALSE, then don't activate noack mode, regardless of what the
3154 stub claimed should be the default with qSupported. */
3156 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
3158 if (noack_config
->detect
== AUTO_BOOLEAN_TRUE
3159 || (noack_config
->detect
== AUTO_BOOLEAN_AUTO
3160 && noack_config
->support
== PACKET_ENABLE
))
3162 putpkt ("QStartNoAckMode");
3163 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3164 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
3170 /* Tell the remote that we are using the extended protocol. */
3172 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3175 /* Next, if the target can specify a description, read it. We do
3176 this before anything involving memory or registers. */
3177 target_find_description ();
3179 /* Next, now that we know something about the target, update the
3180 address spaces in the program spaces. */
3181 update_address_spaces ();
3183 /* On OSs where the list of libraries is global to all
3184 processes, we fetch them early. */
3185 if (gdbarch_has_global_solist (target_gdbarch
))
3186 solib_add (NULL
, from_tty
, target
, auto_solib_add
);
3190 if (!rs
->non_stop_aware
)
3191 error (_("Non-stop mode requested, but remote "
3192 "does not support non-stop"));
3194 putpkt ("QNonStop:1");
3195 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3197 if (strcmp (rs
->buf
, "OK") != 0)
3198 error (_("Remote refused setting non-stop mode with: %s"), rs
->buf
);
3200 /* Find about threads and processes the stub is already
3201 controlling. We default to adding them in the running state.
3202 The '?' query below will then tell us about which threads are
3204 remote_threads_info (target
);
3206 else if (rs
->non_stop_aware
)
3208 /* Don't assume that the stub can operate in all-stop mode.
3209 Request it explicitely. */
3210 putpkt ("QNonStop:0");
3211 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3213 if (strcmp (rs
->buf
, "OK") != 0)
3214 error (_("Remote refused setting all-stop mode with: %s"), rs
->buf
);
3217 /* Check whether the target is running now. */
3219 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3223 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
3226 error (_("The target is not running (try extended-remote?)"));
3228 /* We're connected, but not running. Drop out before we
3229 call start_remote. */
3234 /* Save the reply for later. */
3235 wait_status
= alloca (strlen (rs
->buf
) + 1);
3236 strcpy (wait_status
, rs
->buf
);
3239 /* Let the stub know that we want it to return the thread. */
3240 set_continue_thread (minus_one_ptid
);
3242 /* Without this, some commands which require an active target
3243 (such as kill) won't work. This variable serves (at least)
3244 double duty as both the pid of the target process (if it has
3245 such), and as a flag indicating that a target is active.
3246 These functions should be split out into seperate variables,
3247 especially since GDB will someday have a notion of debugging
3248 several processes. */
3249 inferior_ptid
= magic_null_ptid
;
3251 /* Now, if we have thread information, update inferior_ptid. */
3252 inferior_ptid
= remote_current_thread (inferior_ptid
);
3254 remote_add_inferior (ptid_get_pid (inferior_ptid
), -1);
3256 /* Always add the main thread. */
3257 add_thread_silent (inferior_ptid
);
3259 get_offsets (); /* Get text, data & bss offsets. */
3261 /* If we could not find a description using qXfer, and we know
3262 how to do it some other way, try again. This is not
3263 supported for non-stop; it could be, but it is tricky if
3264 there are no stopped threads when we connect. */
3265 if (remote_read_description_p (target
)
3266 && gdbarch_target_desc (target_gdbarch
) == NULL
)
3268 target_clear_description ();
3269 target_find_description ();
3272 /* Use the previously fetched status. */
3273 gdb_assert (wait_status
!= NULL
);
3274 strcpy (rs
->buf
, wait_status
);
3275 rs
->cached_wait_status
= 1;
3278 start_remote (from_tty
); /* Initialize gdb process mechanisms. */
3282 /* Clear WFI global state. Do this before finding about new
3283 threads and inferiors, and setting the current inferior.
3284 Otherwise we would clear the proceed status of the current
3285 inferior when we want its stop_soon state to be preserved
3286 (see notice_new_inferior). */
3287 init_wait_for_inferior ();
3289 /* In non-stop, we will either get an "OK", meaning that there
3290 are no stopped threads at this time; or, a regular stop
3291 reply. In the latter case, there may be more than one thread
3292 stopped --- we pull them all out using the vStopped
3294 if (strcmp (rs
->buf
, "OK") != 0)
3296 struct stop_reply
*stop_reply
;
3297 struct cleanup
*old_chain
;
3299 stop_reply
= stop_reply_xmalloc ();
3300 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
3302 remote_parse_stop_reply (rs
->buf
, stop_reply
);
3303 discard_cleanups (old_chain
);
3305 /* get_pending_stop_replies acks this one, and gets the rest
3307 pending_stop_reply
= stop_reply
;
3308 remote_get_pending_stop_replies ();
3310 /* Make sure that threads that were stopped remain
3312 iterate_over_threads (set_stop_requested_callback
, NULL
);
3315 if (target_can_async_p ())
3316 target_async (inferior_event_handler
, 0);
3318 if (thread_count () == 0)
3321 error (_("The target is not running (try extended-remote?)"));
3323 /* We're connected, but not running. Drop out before we
3324 call start_remote. */
3328 /* Let the stub know that we want it to return the thread. */
3330 /* Force the stub to choose a thread. */
3331 set_general_thread (null_ptid
);
3334 inferior_ptid
= remote_current_thread (minus_one_ptid
);
3335 if (ptid_equal (inferior_ptid
, minus_one_ptid
))
3336 error (_("remote didn't report the current thread in non-stop mode"));
3338 get_offsets (); /* Get text, data & bss offsets. */
3340 /* In non-stop mode, any cached wait status will be stored in
3341 the stop reply queue. */
3342 gdb_assert (wait_status
== NULL
);
3344 /* Update the remote on signals to silently pass, or more
3345 importantly, which to not ignore, in case a previous session
3346 had set some different set of signals to be ignored. */
3347 remote_pass_signals ();
3350 /* If we connected to a live target, do some additional setup. */
3351 if (target_has_execution
)
3353 if (exec_bfd
) /* No use without an exec file. */
3354 remote_check_symbols (symfile_objfile
);
3357 /* Possibly the target has been engaged in a trace run started
3358 previously; find out where things are at. */
3359 if (remote_get_trace_status (current_trace_status ()) != -1)
3361 struct uploaded_tp
*uploaded_tps
= NULL
;
3362 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
3364 if (current_trace_status ()->running
)
3365 printf_filtered (_("Trace is already running on the target.\n"));
3367 /* Get trace state variables first, they may be checked when
3368 parsing uploaded commands. */
3370 remote_upload_trace_state_variables (&uploaded_tsvs
);
3372 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
3374 remote_upload_tracepoints (&uploaded_tps
);
3376 merge_uploaded_tracepoints (&uploaded_tps
);
3379 /* If breakpoints are global, insert them now. */
3380 if (gdbarch_has_global_breakpoints (target_gdbarch
)
3381 && breakpoints_always_inserted_mode ())
3382 insert_breakpoints ();
3385 /* Open a connection to a remote debugger.
3386 NAME is the filename used for communication. */
3389 remote_open (char *name
, int from_tty
)
3391 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
3394 /* Open a connection to a remote debugger using the extended
3395 remote gdb protocol. NAME is the filename used for communication. */
3398 extended_remote_open (char *name
, int from_tty
)
3400 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
3403 /* Generic code for opening a connection to a remote target. */
3406 init_all_packet_configs (void)
3410 for (i
= 0; i
< PACKET_MAX
; i
++)
3411 update_packet_config (&remote_protocol_packets
[i
]);
3414 /* Symbol look-up. */
3417 remote_check_symbols (struct objfile
*objfile
)
3419 struct remote_state
*rs
= get_remote_state ();
3420 char *msg
, *reply
, *tmp
;
3421 struct minimal_symbol
*sym
;
3424 /* The remote side has no concept of inferiors that aren't running
3425 yet, it only knows about running processes. If we're connected
3426 but our current inferior is not running, we should not invite the
3427 remote target to request symbol lookups related to its
3428 (unrelated) current process. */
3429 if (!target_has_execution
)
3432 if (remote_protocol_packets
[PACKET_qSymbol
].support
== PACKET_DISABLE
)
3435 /* Make sure the remote is pointing at the right process. Note
3436 there's no way to select "no process". */
3437 set_general_process ();
3439 /* Allocate a message buffer. We can't reuse the input buffer in RS,
3440 because we need both at the same time. */
3441 msg
= alloca (get_remote_packet_size ());
3443 /* Invite target to request symbol lookups. */
3445 putpkt ("qSymbol::");
3446 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3447 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSymbol
]);
3450 while (strncmp (reply
, "qSymbol:", 8) == 0)
3453 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
3455 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
3457 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
3460 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
3461 CORE_ADDR sym_addr
= SYMBOL_VALUE_ADDRESS (sym
);
3463 /* If this is a function address, return the start of code
3464 instead of any data function descriptor. */
3465 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch
,
3469 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
3470 phex_nz (sym_addr
, addr_size
), &reply
[8]);
3474 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3479 static struct serial
*
3480 remote_serial_open (char *name
)
3482 static int udp_warning
= 0;
3484 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
3485 of in ser-tcp.c, because it is the remote protocol assuming that the
3486 serial connection is reliable and not the serial connection promising
3488 if (!udp_warning
&& strncmp (name
, "udp:", 4) == 0)
3490 warning (_("The remote protocol may be unreliable over UDP.\n"
3491 "Some events may be lost, rendering further debugging "
3496 return serial_open (name
);
3499 /* Inform the target of our permission settings. The permission flags
3500 work without this, but if the target knows the settings, it can do
3501 a couple things. First, it can add its own check, to catch cases
3502 that somehow manage to get by the permissions checks in target
3503 methods. Second, if the target is wired to disallow particular
3504 settings (for instance, a system in the field that is not set up to
3505 be able to stop at a breakpoint), it can object to any unavailable
3509 remote_set_permissions (void)
3511 struct remote_state
*rs
= get_remote_state ();
3513 sprintf (rs
->buf
, "QAllow:"
3514 "WriteReg:%x;WriteMem:%x;"
3515 "InsertBreak:%x;InsertTrace:%x;"
3516 "InsertFastTrace:%x;Stop:%x",
3517 may_write_registers
, may_write_memory
,
3518 may_insert_breakpoints
, may_insert_tracepoints
,
3519 may_insert_fast_tracepoints
, may_stop
);
3521 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3523 /* If the target didn't like the packet, warn the user. Do not try
3524 to undo the user's settings, that would just be maddening. */
3525 if (strcmp (rs
->buf
, "OK") != 0)
3526 warning (_("Remote refused setting permissions with: %s"), rs
->buf
);
3529 /* This type describes each known response to the qSupported
3531 struct protocol_feature
3533 /* The name of this protocol feature. */
3536 /* The default for this protocol feature. */
3537 enum packet_support default_support
;
3539 /* The function to call when this feature is reported, or after
3540 qSupported processing if the feature is not supported.
3541 The first argument points to this structure. The second
3542 argument indicates whether the packet requested support be
3543 enabled, disabled, or probed (or the default, if this function
3544 is being called at the end of processing and this feature was
3545 not reported). The third argument may be NULL; if not NULL, it
3546 is a NUL-terminated string taken from the packet following
3547 this feature's name and an equals sign. */
3548 void (*func
) (const struct protocol_feature
*, enum packet_support
,
3551 /* The corresponding packet for this feature. Only used if
3552 FUNC is remote_supported_packet. */
3557 remote_supported_packet (const struct protocol_feature
*feature
,
3558 enum packet_support support
,
3559 const char *argument
)
3563 warning (_("Remote qSupported response supplied an unexpected value for"
3564 " \"%s\"."), feature
->name
);
3568 if (remote_protocol_packets
[feature
->packet
].support
3569 == PACKET_SUPPORT_UNKNOWN
)
3570 remote_protocol_packets
[feature
->packet
].support
= support
;
3574 remote_packet_size (const struct protocol_feature
*feature
,
3575 enum packet_support support
, const char *value
)
3577 struct remote_state
*rs
= get_remote_state ();
3582 if (support
!= PACKET_ENABLE
)
3585 if (value
== NULL
|| *value
== '\0')
3587 warning (_("Remote target reported \"%s\" without a size."),
3593 packet_size
= strtol (value
, &value_end
, 16);
3594 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
3596 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
3597 feature
->name
, value
);
3601 if (packet_size
> MAX_REMOTE_PACKET_SIZE
)
3603 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
3604 packet_size
, MAX_REMOTE_PACKET_SIZE
);
3605 packet_size
= MAX_REMOTE_PACKET_SIZE
;
3608 /* Record the new maximum packet size. */
3609 rs
->explicit_packet_size
= packet_size
;
3613 remote_multi_process_feature (const struct protocol_feature
*feature
,
3614 enum packet_support support
, const char *value
)
3616 struct remote_state
*rs
= get_remote_state ();
3618 rs
->multi_process_aware
= (support
== PACKET_ENABLE
);
3622 remote_non_stop_feature (const struct protocol_feature
*feature
,
3623 enum packet_support support
, const char *value
)
3625 struct remote_state
*rs
= get_remote_state ();
3627 rs
->non_stop_aware
= (support
== PACKET_ENABLE
);
3631 remote_cond_tracepoint_feature (const struct protocol_feature
*feature
,
3632 enum packet_support support
,
3635 struct remote_state
*rs
= get_remote_state ();
3637 rs
->cond_tracepoints
= (support
== PACKET_ENABLE
);
3641 remote_fast_tracepoint_feature (const struct protocol_feature
*feature
,
3642 enum packet_support support
,
3645 struct remote_state
*rs
= get_remote_state ();
3647 rs
->fast_tracepoints
= (support
== PACKET_ENABLE
);
3651 remote_static_tracepoint_feature (const struct protocol_feature
*feature
,
3652 enum packet_support support
,
3655 struct remote_state
*rs
= get_remote_state ();
3657 rs
->static_tracepoints
= (support
== PACKET_ENABLE
);
3661 remote_disconnected_tracing_feature (const struct protocol_feature
*feature
,
3662 enum packet_support support
,
3665 struct remote_state
*rs
= get_remote_state ();
3667 rs
->disconnected_tracing
= (support
== PACKET_ENABLE
);
3670 static struct protocol_feature remote_protocol_features
[] = {
3671 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
3672 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
3673 PACKET_qXfer_auxv
},
3674 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
3675 PACKET_qXfer_features
},
3676 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
3677 PACKET_qXfer_libraries
},
3678 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
3679 PACKET_qXfer_memory_map
},
3680 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
3681 PACKET_qXfer_spu_read
},
3682 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
3683 PACKET_qXfer_spu_write
},
3684 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
3685 PACKET_qXfer_osdata
},
3686 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
3687 PACKET_qXfer_threads
},
3688 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
3689 PACKET_qXfer_traceframe_info
},
3690 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
3691 PACKET_QPassSignals
},
3692 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
3693 PACKET_QStartNoAckMode
},
3694 { "multiprocess", PACKET_DISABLE
, remote_multi_process_feature
, -1 },
3695 { "QNonStop", PACKET_DISABLE
, remote_non_stop_feature
, -1 },
3696 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
3697 PACKET_qXfer_siginfo_read
},
3698 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
3699 PACKET_qXfer_siginfo_write
},
3700 { "ConditionalTracepoints", PACKET_DISABLE
, remote_cond_tracepoint_feature
,
3701 PACKET_ConditionalTracepoints
},
3702 { "FastTracepoints", PACKET_DISABLE
, remote_fast_tracepoint_feature
,
3703 PACKET_FastTracepoints
},
3704 { "StaticTracepoints", PACKET_DISABLE
, remote_static_tracepoint_feature
,
3705 PACKET_StaticTracepoints
},
3706 { "DisconnectedTracing", PACKET_DISABLE
, remote_disconnected_tracing_feature
,
3708 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
3710 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
3712 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
3713 PACKET_TracepointSource
},
3714 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
3718 static char *remote_support_xml
;
3720 /* Register string appended to "xmlRegisters=" in qSupported query. */
3723 register_remote_support_xml (const char *xml
)
3725 #if defined(HAVE_LIBEXPAT)
3726 if (remote_support_xml
== NULL
)
3727 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
3730 char *copy
= xstrdup (remote_support_xml
+ 13);
3731 char *p
= strtok (copy
, ",");
3735 if (strcmp (p
, xml
) == 0)
3742 while ((p
= strtok (NULL
, ",")) != NULL
);
3745 remote_support_xml
= reconcat (remote_support_xml
,
3746 remote_support_xml
, ",", xml
,
3753 remote_query_supported_append (char *msg
, const char *append
)
3756 return reconcat (msg
, msg
, ";", append
, (char *) NULL
);
3758 return xstrdup (append
);
3762 remote_query_supported (void)
3764 struct remote_state
*rs
= get_remote_state ();
3767 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
3769 /* The packet support flags are handled differently for this packet
3770 than for most others. We treat an error, a disabled packet, and
3771 an empty response identically: any features which must be reported
3772 to be used will be automatically disabled. An empty buffer
3773 accomplishes this, since that is also the representation for a list
3774 containing no features. */
3777 if (remote_protocol_packets
[PACKET_qSupported
].support
!= PACKET_DISABLE
)
3780 struct cleanup
*old_chain
= make_cleanup (free_current_contents
, &q
);
3783 q
= remote_query_supported_append (q
, "multiprocess+");
3785 if (remote_support_xml
)
3786 q
= remote_query_supported_append (q
, remote_support_xml
);
3788 q
= remote_query_supported_append (q
, "qRelocInsn+");
3790 q
= reconcat (q
, "qSupported:", q
, (char *) NULL
);
3793 do_cleanups (old_chain
);
3795 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3797 /* If an error occured, warn, but do not return - just reset the
3798 buffer to empty and go on to disable features. */
3799 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
3802 warning (_("Remote failure reply: %s"), rs
->buf
);
3807 memset (seen
, 0, sizeof (seen
));
3812 enum packet_support is_supported
;
3813 char *p
, *end
, *name_end
, *value
;
3815 /* First separate out this item from the rest of the packet. If
3816 there's another item after this, we overwrite the separator
3817 (terminated strings are much easier to work with). */
3819 end
= strchr (p
, ';');
3822 end
= p
+ strlen (p
);
3832 warning (_("empty item in \"qSupported\" response"));
3837 name_end
= strchr (p
, '=');
3840 /* This is a name=value entry. */
3841 is_supported
= PACKET_ENABLE
;
3842 value
= name_end
+ 1;
3851 is_supported
= PACKET_ENABLE
;
3855 is_supported
= PACKET_DISABLE
;
3859 is_supported
= PACKET_SUPPORT_UNKNOWN
;
3863 warning (_("unrecognized item \"%s\" "
3864 "in \"qSupported\" response"), p
);
3870 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3871 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
3873 const struct protocol_feature
*feature
;
3876 feature
= &remote_protocol_features
[i
];
3877 feature
->func (feature
, is_supported
, value
);
3882 /* If we increased the packet size, make sure to increase the global
3883 buffer size also. We delay this until after parsing the entire
3884 qSupported packet, because this is the same buffer we were
3886 if (rs
->buf_size
< rs
->explicit_packet_size
)
3888 rs
->buf_size
= rs
->explicit_packet_size
;
3889 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
3892 /* Handle the defaults for unmentioned features. */
3893 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3896 const struct protocol_feature
*feature
;
3898 feature
= &remote_protocol_features
[i
];
3899 feature
->func (feature
, feature
->default_support
, NULL
);
3905 remote_open_1 (char *name
, int from_tty
,
3906 struct target_ops
*target
, int extended_p
)
3908 struct remote_state
*rs
= get_remote_state ();
3911 error (_("To open a remote debug connection, you need to specify what\n"
3912 "serial device is attached to the remote system\n"
3913 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
3915 /* See FIXME above. */
3916 if (!target_async_permitted
)
3917 wait_forever_enabled_p
= 1;
3919 /* If we're connected to a running target, target_preopen will kill it.
3920 But if we're connected to a target system with no running process,
3921 then we will still be connected when it returns. Ask this question
3922 first, before target_preopen has a chance to kill anything. */
3923 if (remote_desc
!= NULL
&& !have_inferiors ())
3926 || query (_("Already connected to a remote target. Disconnect? ")))
3929 error (_("Still connected."));
3932 target_preopen (from_tty
);
3934 unpush_target (target
);
3936 /* This time without a query. If we were connected to an
3937 extended-remote target and target_preopen killed the running
3938 process, we may still be connected. If we are starting "target
3939 remote" now, the extended-remote target will not have been
3940 removed by unpush_target. */
3941 if (remote_desc
!= NULL
&& !have_inferiors ())
3944 /* Make sure we send the passed signals list the next time we resume. */
3945 xfree (last_pass_packet
);
3946 last_pass_packet
= NULL
;
3948 remote_fileio_reset ();
3949 reopen_exec_file ();
3952 remote_desc
= remote_serial_open (name
);
3954 perror_with_name (name
);
3956 if (baud_rate
!= -1)
3958 if (serial_setbaudrate (remote_desc
, baud_rate
))
3960 /* The requested speed could not be set. Error out to
3961 top level after closing remote_desc. Take care to
3962 set remote_desc to NULL to avoid closing remote_desc
3964 serial_close (remote_desc
);
3966 perror_with_name (name
);
3970 serial_raw (remote_desc
);
3972 /* If there is something sitting in the buffer we might take it as a
3973 response to a command, which would be bad. */
3974 serial_flush_input (remote_desc
);
3978 puts_filtered ("Remote debugging using ");
3979 puts_filtered (name
);
3980 puts_filtered ("\n");
3982 push_target (target
); /* Switch to using remote target now. */
3984 /* Register extra event sources in the event loop. */
3985 remote_async_inferior_event_token
3986 = create_async_event_handler (remote_async_inferior_event_handler
,
3988 remote_async_get_pending_events_token
3989 = create_async_event_handler (remote_async_get_pending_events_handler
,
3992 /* Reset the target state; these things will be queried either by
3993 remote_query_supported or as they are needed. */
3994 init_all_packet_configs ();
3995 rs
->cached_wait_status
= 0;
3996 rs
->explicit_packet_size
= 0;
3998 rs
->multi_process_aware
= 0;
3999 rs
->extended
= extended_p
;
4000 rs
->non_stop_aware
= 0;
4001 rs
->waiting_for_stop_reply
= 0;
4002 rs
->ctrlc_pending_p
= 0;
4004 general_thread
= not_sent_ptid
;
4005 continue_thread
= not_sent_ptid
;
4006 remote_traceframe_number
= -1;
4008 /* Probe for ability to use "ThreadInfo" query, as required. */
4009 use_threadinfo_query
= 1;
4010 use_threadextra_query
= 1;
4012 if (target_async_permitted
)
4014 /* With this target we start out by owning the terminal. */
4015 remote_async_terminal_ours_p
= 1;
4017 /* FIXME: cagney/1999-09-23: During the initial connection it is
4018 assumed that the target is already ready and able to respond to
4019 requests. Unfortunately remote_start_remote() eventually calls
4020 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
4021 around this. Eventually a mechanism that allows
4022 wait_for_inferior() to expect/get timeouts will be
4024 wait_forever_enabled_p
= 0;
4027 /* First delete any symbols previously loaded from shared libraries. */
4028 no_shared_libraries (NULL
, 0);
4031 init_thread_list ();
4033 /* Start the remote connection. If error() or QUIT, discard this
4034 target (we'd otherwise be in an inconsistent state) and then
4035 propogate the error on up the exception chain. This ensures that
4036 the caller doesn't stumble along blindly assuming that the
4037 function succeeded. The CLI doesn't have this problem but other
4038 UI's, such as MI do.
4040 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
4041 this function should return an error indication letting the
4042 caller restore the previous state. Unfortunately the command
4043 ``target remote'' is directly wired to this function making that
4044 impossible. On a positive note, the CLI side of this problem has
4045 been fixed - the function set_cmd_context() makes it possible for
4046 all the ``target ....'' commands to share a common callback
4047 function. See cli-dump.c. */
4049 volatile struct gdb_exception ex
;
4051 TRY_CATCH (ex
, RETURN_MASK_ALL
)
4053 remote_start_remote (from_tty
, target
, extended_p
);
4057 /* Pop the partially set up target - unless something else did
4058 already before throwing the exception. */
4059 if (remote_desc
!= NULL
)
4061 if (target_async_permitted
)
4062 wait_forever_enabled_p
= 1;
4063 throw_exception (ex
);
4067 if (target_async_permitted
)
4068 wait_forever_enabled_p
= 1;
4071 /* This takes a program previously attached to and detaches it. After
4072 this is done, GDB can be used to debug some other program. We
4073 better not have left any breakpoints in the target program or it'll
4074 die when it hits one. */
4077 remote_detach_1 (char *args
, int from_tty
, int extended
)
4079 int pid
= ptid_get_pid (inferior_ptid
);
4080 struct remote_state
*rs
= get_remote_state ();
4083 error (_("Argument given to \"detach\" when remotely debugging."));
4085 if (!target_has_execution
)
4086 error (_("No process to detach from."));
4088 /* Tell the remote target to detach. */
4089 if (remote_multi_process_p (rs
))
4090 sprintf (rs
->buf
, "D;%x", pid
);
4092 strcpy (rs
->buf
, "D");
4095 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4097 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
4099 else if (rs
->buf
[0] == '\0')
4100 error (_("Remote doesn't know how to detach"));
4102 error (_("Can't detach process."));
4106 if (remote_multi_process_p (rs
))
4107 printf_filtered (_("Detached from remote %s.\n"),
4108 target_pid_to_str (pid_to_ptid (pid
)));
4112 puts_filtered (_("Detached from remote process.\n"));
4114 puts_filtered (_("Ending remote debugging.\n"));
4118 discard_pending_stop_replies (pid
);
4119 target_mourn_inferior ();
4123 remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
4125 remote_detach_1 (args
, from_tty
, 0);
4129 extended_remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
4131 remote_detach_1 (args
, from_tty
, 1);
4134 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
4137 remote_disconnect (struct target_ops
*target
, char *args
, int from_tty
)
4140 error (_("Argument given to \"disconnect\" when remotely debugging."));
4142 /* Make sure we unpush even the extended remote targets; mourn
4143 won't do it. So call remote_mourn_1 directly instead of
4144 target_mourn_inferior. */
4145 remote_mourn_1 (target
);
4148 puts_filtered ("Ending remote debugging.\n");
4151 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
4152 be chatty about it. */
4155 extended_remote_attach_1 (struct target_ops
*target
, char *args
, int from_tty
)
4157 struct remote_state
*rs
= get_remote_state ();
4159 char *wait_status
= NULL
;
4161 pid
= parse_pid_to_attach (args
);
4163 /* Remote PID can be freely equal to getpid, do not check it here the same
4164 way as in other targets. */
4166 if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
4167 error (_("This target does not support attaching to a process"));
4169 sprintf (rs
->buf
, "vAttach;%x", pid
);
4171 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4173 if (packet_ok (rs
->buf
,
4174 &remote_protocol_packets
[PACKET_vAttach
]) == PACKET_OK
)
4177 printf_unfiltered (_("Attached to %s\n"),
4178 target_pid_to_str (pid_to_ptid (pid
)));
4182 /* Save the reply for later. */
4183 wait_status
= alloca (strlen (rs
->buf
) + 1);
4184 strcpy (wait_status
, rs
->buf
);
4186 else if (strcmp (rs
->buf
, "OK") != 0)
4187 error (_("Attaching to %s failed with: %s"),
4188 target_pid_to_str (pid_to_ptid (pid
)),
4191 else if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
4192 error (_("This target does not support attaching to a process"));
4194 error (_("Attaching to %s failed"),
4195 target_pid_to_str (pid_to_ptid (pid
)));
4197 set_current_inferior (remote_add_inferior (pid
, 1));
4199 inferior_ptid
= pid_to_ptid (pid
);
4203 struct thread_info
*thread
;
4205 /* Get list of threads. */
4206 remote_threads_info (target
);
4208 thread
= first_thread_of_process (pid
);
4210 inferior_ptid
= thread
->ptid
;
4212 inferior_ptid
= pid_to_ptid (pid
);
4214 /* Invalidate our notion of the remote current thread. */
4215 record_currthread (minus_one_ptid
);
4219 /* Now, if we have thread information, update inferior_ptid. */
4220 inferior_ptid
= remote_current_thread (inferior_ptid
);
4222 /* Add the main thread to the thread list. */
4223 add_thread_silent (inferior_ptid
);
4226 /* Next, if the target can specify a description, read it. We do
4227 this before anything involving memory or registers. */
4228 target_find_description ();
4232 /* Use the previously fetched status. */
4233 gdb_assert (wait_status
!= NULL
);
4235 if (target_can_async_p ())
4237 struct stop_reply
*stop_reply
;
4238 struct cleanup
*old_chain
;
4240 stop_reply
= stop_reply_xmalloc ();
4241 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
4242 remote_parse_stop_reply (wait_status
, stop_reply
);
4243 discard_cleanups (old_chain
);
4244 push_stop_reply (stop_reply
);
4246 target_async (inferior_event_handler
, 0);
4250 gdb_assert (wait_status
!= NULL
);
4251 strcpy (rs
->buf
, wait_status
);
4252 rs
->cached_wait_status
= 1;
4256 gdb_assert (wait_status
== NULL
);
4260 extended_remote_attach (struct target_ops
*ops
, char *args
, int from_tty
)
4262 extended_remote_attach_1 (ops
, args
, from_tty
);
4265 /* Convert hex digit A to a number. */
4270 if (a
>= '0' && a
<= '9')
4272 else if (a
>= 'a' && a
<= 'f')
4273 return a
- 'a' + 10;
4274 else if (a
>= 'A' && a
<= 'F')
4275 return a
- 'A' + 10;
4277 error (_("Reply contains invalid hex digit %d"), a
);
4281 hex2bin (const char *hex
, gdb_byte
*bin
, int count
)
4285 for (i
= 0; i
< count
; i
++)
4287 if (hex
[0] == 0 || hex
[1] == 0)
4289 /* Hex string is short, or of uneven length.
4290 Return the count that has been converted so far. */
4293 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
4299 /* Convert number NIB to a hex digit. */
4307 return 'a' + nib
- 10;
4311 bin2hex (const gdb_byte
*bin
, char *hex
, int count
)
4315 /* May use a length, or a nul-terminated string as input. */
4317 count
= strlen ((char *) bin
);
4319 for (i
= 0; i
< count
; i
++)
4321 *hex
++ = tohex ((*bin
>> 4) & 0xf);
4322 *hex
++ = tohex (*bin
++ & 0xf);
4328 /* Check for the availability of vCont. This function should also check
4332 remote_vcont_probe (struct remote_state
*rs
)
4336 strcpy (rs
->buf
, "vCont?");
4338 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4341 /* Make sure that the features we assume are supported. */
4342 if (strncmp (buf
, "vCont", 5) == 0)
4345 int support_s
, support_S
, support_c
, support_C
;
4351 rs
->support_vCont_t
= 0;
4352 while (p
&& *p
== ';')
4355 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4357 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4359 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4361 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4363 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4364 rs
->support_vCont_t
= 1;
4366 p
= strchr (p
, ';');
4369 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
4370 BUF will make packet_ok disable the packet. */
4371 if (!support_s
|| !support_S
|| !support_c
|| !support_C
)
4375 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
4378 /* Helper function for building "vCont" resumptions. Write a
4379 resumption to P. ENDP points to one-passed-the-end of the buffer
4380 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
4381 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
4382 resumed thread should be single-stepped and/or signalled. If PTID
4383 equals minus_one_ptid, then all threads are resumed; if PTID
4384 represents a process, then all threads of the process are resumed;
4385 the thread to be stepped and/or signalled is given in the global
4389 append_resumption (char *p
, char *endp
,
4390 ptid_t ptid
, int step
, enum target_signal siggnal
)
4392 struct remote_state
*rs
= get_remote_state ();
4394 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
4395 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
4397 p
+= xsnprintf (p
, endp
- p
, ";s");
4398 else if (siggnal
!= TARGET_SIGNAL_0
)
4399 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
4401 p
+= xsnprintf (p
, endp
- p
, ";c");
4403 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
4407 /* All (-1) threads of process. */
4408 nptid
= ptid_build (ptid_get_pid (ptid
), 0, -1);
4410 p
+= xsnprintf (p
, endp
- p
, ":");
4411 p
= write_ptid (p
, endp
, nptid
);
4413 else if (!ptid_equal (ptid
, minus_one_ptid
))
4415 p
+= xsnprintf (p
, endp
- p
, ":");
4416 p
= write_ptid (p
, endp
, ptid
);
4422 /* Resume the remote inferior by using a "vCont" packet. The thread
4423 to be resumed is PTID; STEP and SIGGNAL indicate whether the
4424 resumed thread should be single-stepped and/or signalled. If PTID
4425 equals minus_one_ptid, then all threads are resumed; the thread to
4426 be stepped and/or signalled is given in the global INFERIOR_PTID.
4427 This function returns non-zero iff it resumes the inferior.
4429 This function issues a strict subset of all possible vCont commands at the
4433 remote_vcont_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
4435 struct remote_state
*rs
= get_remote_state ();
4439 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
4440 remote_vcont_probe (rs
);
4442 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_DISABLE
)
4446 endp
= rs
->buf
+ get_remote_packet_size ();
4448 /* If we could generate a wider range of packets, we'd have to worry
4449 about overflowing BUF. Should there be a generic
4450 "multi-part-packet" packet? */
4452 p
+= xsnprintf (p
, endp
- p
, "vCont");
4454 if (ptid_equal (ptid
, magic_null_ptid
))
4456 /* MAGIC_NULL_PTID means that we don't have any active threads,
4457 so we don't have any TID numbers the inferior will
4458 understand. Make sure to only send forms that do not specify
4460 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
4462 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
4464 /* Resume all threads (of all processes, or of a single
4465 process), with preference for INFERIOR_PTID. This assumes
4466 inferior_ptid belongs to the set of all threads we are about
4468 if (step
|| siggnal
!= TARGET_SIGNAL_0
)
4470 /* Step inferior_ptid, with or without signal. */
4471 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
4474 /* And continue others without a signal. */
4475 append_resumption (p
, endp
, ptid
, /*step=*/ 0, TARGET_SIGNAL_0
);
4479 /* Scheduler locking; resume only PTID. */
4480 append_resumption (p
, endp
, ptid
, step
, siggnal
);
4483 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
4488 /* In non-stop, the stub replies to vCont with "OK". The stop
4489 reply will be reported asynchronously by means of a `%Stop'
4491 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4492 if (strcmp (rs
->buf
, "OK") != 0)
4493 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
4499 /* Tell the remote machine to resume. */
4501 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
4503 static int last_sent_step
;
4506 remote_resume (struct target_ops
*ops
,
4507 ptid_t ptid
, int step
, enum target_signal siggnal
)
4509 struct remote_state
*rs
= get_remote_state ();
4512 last_sent_signal
= siggnal
;
4513 last_sent_step
= step
;
4515 /* Update the inferior on signals to silently pass, if they've changed. */
4516 remote_pass_signals ();
4518 /* The vCont packet doesn't need to specify threads via Hc. */
4519 /* No reverse support (yet) for vCont. */
4520 if (execution_direction
!= EXEC_REVERSE
)
4521 if (remote_vcont_resume (ptid
, step
, siggnal
))
4524 /* All other supported resume packets do use Hc, so set the continue
4526 if (ptid_equal (ptid
, minus_one_ptid
))
4527 set_continue_thread (any_thread_ptid
);
4529 set_continue_thread (ptid
);
4532 if (execution_direction
== EXEC_REVERSE
)
4534 /* We don't pass signals to the target in reverse exec mode. */
4535 if (info_verbose
&& siggnal
!= TARGET_SIGNAL_0
)
4536 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
4540 && remote_protocol_packets
[PACKET_bs
].support
== PACKET_DISABLE
)
4541 error (_("Remote reverse-step not supported."));
4543 && remote_protocol_packets
[PACKET_bc
].support
== PACKET_DISABLE
)
4544 error (_("Remote reverse-continue not supported."));
4546 strcpy (buf
, step
? "bs" : "bc");
4548 else if (siggnal
!= TARGET_SIGNAL_0
)
4550 buf
[0] = step
? 'S' : 'C';
4551 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
4552 buf
[2] = tohex (((int) siggnal
) & 0xf);
4556 strcpy (buf
, step
? "s" : "c");
4561 /* We are about to start executing the inferior, let's register it
4562 with the event loop. NOTE: this is the one place where all the
4563 execution commands end up. We could alternatively do this in each
4564 of the execution commands in infcmd.c. */
4565 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
4566 into infcmd.c in order to allow inferior function calls to work
4567 NOT asynchronously. */
4568 if (target_can_async_p ())
4569 target_async (inferior_event_handler
, 0);
4571 /* We've just told the target to resume. The remote server will
4572 wait for the inferior to stop, and then send a stop reply. In
4573 the mean time, we can't start another command/query ourselves
4574 because the stub wouldn't be ready to process it. This applies
4575 only to the base all-stop protocol, however. In non-stop (which
4576 only supports vCont), the stub replies with an "OK", and is
4577 immediate able to process further serial input. */
4579 rs
->waiting_for_stop_reply
= 1;
4583 /* Set up the signal handler for SIGINT, while the target is
4584 executing, ovewriting the 'regular' SIGINT signal handler. */
4586 initialize_sigint_signal_handler (void)
4588 signal (SIGINT
, handle_remote_sigint
);
4591 /* Signal handler for SIGINT, while the target is executing. */
4593 handle_remote_sigint (int sig
)
4595 signal (sig
, handle_remote_sigint_twice
);
4596 mark_async_signal_handler_wrapper (sigint_remote_token
);
4599 /* Signal handler for SIGINT, installed after SIGINT has already been
4600 sent once. It will take effect the second time that the user sends
4603 handle_remote_sigint_twice (int sig
)
4605 signal (sig
, handle_remote_sigint
);
4606 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
4609 /* Perform the real interruption of the target execution, in response
4612 async_remote_interrupt (gdb_client_data arg
)
4615 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
4617 target_stop (inferior_ptid
);
4620 /* Perform interrupt, if the first attempt did not succeed. Just give
4621 up on the target alltogether. */
4623 async_remote_interrupt_twice (gdb_client_data arg
)
4626 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
4631 /* Reinstall the usual SIGINT handlers, after the target has
4634 cleanup_sigint_signal_handler (void *dummy
)
4636 signal (SIGINT
, handle_sigint
);
4639 /* Send ^C to target to halt it. Target will respond, and send us a
4641 static void (*ofunc
) (int);
4643 /* The command line interface's stop routine. This function is installed
4644 as a signal handler for SIGINT. The first time a user requests a
4645 stop, we call remote_stop to send a break or ^C. If there is no
4646 response from the target (it didn't stop when the user requested it),
4647 we ask the user if he'd like to detach from the target. */
4649 remote_interrupt (int signo
)
4651 /* If this doesn't work, try more severe steps. */
4652 signal (signo
, remote_interrupt_twice
);
4654 gdb_call_async_signal_handler (sigint_remote_token
, 1);
4657 /* The user typed ^C twice. */
4660 remote_interrupt_twice (int signo
)
4662 signal (signo
, ofunc
);
4663 gdb_call_async_signal_handler (sigint_remote_twice_token
, 1);
4664 signal (signo
, remote_interrupt
);
4667 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
4668 thread, all threads of a remote process, or all threads of all
4672 remote_stop_ns (ptid_t ptid
)
4674 struct remote_state
*rs
= get_remote_state ();
4676 char *endp
= rs
->buf
+ get_remote_packet_size ();
4678 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
4679 remote_vcont_probe (rs
);
4681 if (!rs
->support_vCont_t
)
4682 error (_("Remote server does not support stopping threads"));
4684 if (ptid_equal (ptid
, minus_one_ptid
)
4685 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
4686 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
4691 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
4693 if (ptid_is_pid (ptid
))
4694 /* All (-1) threads of process. */
4695 nptid
= ptid_build (ptid_get_pid (ptid
), 0, -1);
4698 /* Small optimization: if we already have a stop reply for
4699 this thread, no use in telling the stub we want this
4701 if (peek_stop_reply (ptid
))
4707 write_ptid (p
, endp
, nptid
);
4710 /* In non-stop, we get an immediate OK reply. The stop reply will
4711 come in asynchronously by notification. */
4713 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4714 if (strcmp (rs
->buf
, "OK") != 0)
4715 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
4718 /* All-stop version of target_stop. Sends a break or a ^C to stop the
4719 remote target. It is undefined which thread of which process
4720 reports the stop. */
4723 remote_stop_as (ptid_t ptid
)
4725 struct remote_state
*rs
= get_remote_state ();
4727 rs
->ctrlc_pending_p
= 1;
4729 /* If the inferior is stopped already, but the core didn't know
4730 about it yet, just ignore the request. The cached wait status
4731 will be collected in remote_wait. */
4732 if (rs
->cached_wait_status
)
4735 /* Send interrupt_sequence to remote target. */
4736 send_interrupt_sequence ();
4739 /* This is the generic stop called via the target vector. When a target
4740 interrupt is requested, either by the command line or the GUI, we
4741 will eventually end up here. */
4744 remote_stop (ptid_t ptid
)
4747 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
4750 remote_stop_ns (ptid
);
4752 remote_stop_as (ptid
);
4755 /* Ask the user what to do when an interrupt is received. */
4758 interrupt_query (void)
4760 target_terminal_ours ();
4762 if (target_can_async_p ())
4764 signal (SIGINT
, handle_sigint
);
4765 deprecated_throw_reason (RETURN_QUIT
);
4769 if (query (_("Interrupted while waiting for the program.\n\
4770 Give up (and stop debugging it)? ")))
4773 deprecated_throw_reason (RETURN_QUIT
);
4777 target_terminal_inferior ();
4780 /* Enable/disable target terminal ownership. Most targets can use
4781 terminal groups to control terminal ownership. Remote targets are
4782 different in that explicit transfer of ownership to/from GDB/target
4786 remote_terminal_inferior (void)
4788 if (!target_async_permitted
)
4789 /* Nothing to do. */
4792 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
4793 idempotent. The event-loop GDB talking to an asynchronous target
4794 with a synchronous command calls this function from both
4795 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
4796 transfer the terminal to the target when it shouldn't this guard
4798 if (!remote_async_terminal_ours_p
)
4800 delete_file_handler (input_fd
);
4801 remote_async_terminal_ours_p
= 0;
4802 initialize_sigint_signal_handler ();
4803 /* NOTE: At this point we could also register our selves as the
4804 recipient of all input. Any characters typed could then be
4805 passed on down to the target. */
4809 remote_terminal_ours (void)
4811 if (!target_async_permitted
)
4812 /* Nothing to do. */
4815 /* See FIXME in remote_terminal_inferior. */
4816 if (remote_async_terminal_ours_p
)
4818 cleanup_sigint_signal_handler (NULL
);
4819 add_file_handler (input_fd
, stdin_event_handler
, 0);
4820 remote_async_terminal_ours_p
= 1;
4824 remote_console_output (char *msg
)
4828 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
4831 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
4835 fputs_unfiltered (tb
, gdb_stdtarg
);
4837 gdb_flush (gdb_stdtarg
);
4840 typedef struct cached_reg
4843 gdb_byte data
[MAX_REGISTER_SIZE
];
4846 DEF_VEC_O(cached_reg_t
);
4850 struct stop_reply
*next
;
4854 struct target_waitstatus ws
;
4856 VEC(cached_reg_t
) *regcache
;
4858 int stopped_by_watchpoint_p
;
4859 CORE_ADDR watch_data_address
;
4867 /* The list of already fetched and acknowledged stop events. */
4868 static struct stop_reply
*stop_reply_queue
;
4870 static struct stop_reply
*
4871 stop_reply_xmalloc (void)
4873 struct stop_reply
*r
= XMALLOC (struct stop_reply
);
4880 stop_reply_xfree (struct stop_reply
*r
)
4884 VEC_free (cached_reg_t
, r
->regcache
);
4889 /* Discard all pending stop replies of inferior PID. If PID is -1,
4890 discard everything. */
4893 discard_pending_stop_replies (int pid
)
4895 struct stop_reply
*prev
= NULL
, *reply
, *next
;
4897 /* Discard the in-flight notification. */
4898 if (pending_stop_reply
!= NULL
4900 || ptid_get_pid (pending_stop_reply
->ptid
) == pid
))
4902 stop_reply_xfree (pending_stop_reply
);
4903 pending_stop_reply
= NULL
;
4906 /* Discard the stop replies we have already pulled with
4908 for (reply
= stop_reply_queue
; reply
; reply
= next
)
4912 || ptid_get_pid (reply
->ptid
) == pid
)
4914 if (reply
== stop_reply_queue
)
4915 stop_reply_queue
= reply
->next
;
4917 prev
->next
= reply
->next
;
4919 stop_reply_xfree (reply
);
4926 /* Cleanup wrapper. */
4929 do_stop_reply_xfree (void *arg
)
4931 struct stop_reply
*r
= arg
;
4933 stop_reply_xfree (r
);
4936 /* Look for a queued stop reply belonging to PTID. If one is found,
4937 remove it from the queue, and return it. Returns NULL if none is
4938 found. If there are still queued events left to process, tell the
4939 event loop to get back to target_wait soon. */
4941 static struct stop_reply
*
4942 queued_stop_reply (ptid_t ptid
)
4944 struct stop_reply
*it
;
4945 struct stop_reply
**it_link
;
4947 it
= stop_reply_queue
;
4948 it_link
= &stop_reply_queue
;
4951 if (ptid_match (it
->ptid
, ptid
))
4953 *it_link
= it
->next
;
4958 it_link
= &it
->next
;
4962 if (stop_reply_queue
)
4963 /* There's still at least an event left. */
4964 mark_async_event_handler (remote_async_inferior_event_token
);
4969 /* Push a fully parsed stop reply in the stop reply queue. Since we
4970 know that we now have at least one queued event left to pass to the
4971 core side, tell the event loop to get back to target_wait soon. */
4974 push_stop_reply (struct stop_reply
*new_event
)
4976 struct stop_reply
*event
;
4978 if (stop_reply_queue
)
4980 for (event
= stop_reply_queue
;
4981 event
&& event
->next
;
4982 event
= event
->next
)
4985 event
->next
= new_event
;
4988 stop_reply_queue
= new_event
;
4990 mark_async_event_handler (remote_async_inferior_event_token
);
4993 /* Returns true if we have a stop reply for PTID. */
4996 peek_stop_reply (ptid_t ptid
)
4998 struct stop_reply
*it
;
5000 for (it
= stop_reply_queue
; it
; it
= it
->next
)
5001 if (ptid_equal (ptid
, it
->ptid
))
5003 if (it
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
5010 /* Parse the stop reply in BUF. Either the function succeeds, and the
5011 result is stored in EVENT, or throws an error. */
5014 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
5016 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5020 event
->ptid
= null_ptid
;
5021 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
5022 event
->ws
.value
.integer
= 0;
5023 event
->solibs_changed
= 0;
5024 event
->replay_event
= 0;
5025 event
->stopped_by_watchpoint_p
= 0;
5026 event
->regcache
= NULL
;
5031 case 'T': /* Status with PC, SP, FP, ... */
5032 /* Expedited reply, containing Signal, {regno, reg} repeat. */
5033 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
5035 n... = register number
5036 r... = register contents
5039 p
= &buf
[3]; /* after Txx */
5047 /* If the packet contains a register number, save it in
5048 pnum and set p1 to point to the character following it.
5049 Otherwise p1 points to p. */
5051 /* If this packet is an awatch packet, don't parse the 'a'
5052 as a register number. */
5054 if (strncmp (p
, "awatch", strlen("awatch")) != 0
5055 && strncmp (p
, "core", strlen ("core") != 0))
5057 /* Read the ``P'' register number. */
5058 pnum
= strtol (p
, &p_temp
, 16);
5064 if (p1
== p
) /* No register number present here. */
5066 p1
= strchr (p
, ':');
5068 error (_("Malformed packet(a) (missing colon): %s\n\
5071 if (strncmp (p
, "thread", p1
- p
) == 0)
5072 event
->ptid
= read_ptid (++p1
, &p
);
5073 else if ((strncmp (p
, "watch", p1
- p
) == 0)
5074 || (strncmp (p
, "rwatch", p1
- p
) == 0)
5075 || (strncmp (p
, "awatch", p1
- p
) == 0))
5077 event
->stopped_by_watchpoint_p
= 1;
5078 p
= unpack_varlen_hex (++p1
, &addr
);
5079 event
->watch_data_address
= (CORE_ADDR
) addr
;
5081 else if (strncmp (p
, "library", p1
- p
) == 0)
5085 while (*p_temp
&& *p_temp
!= ';')
5088 event
->solibs_changed
= 1;
5091 else if (strncmp (p
, "replaylog", p1
- p
) == 0)
5093 /* NO_HISTORY event.
5094 p1 will indicate "begin" or "end", but
5095 it makes no difference for now, so ignore it. */
5096 event
->replay_event
= 1;
5097 p_temp
= strchr (p1
+ 1, ';');
5101 else if (strncmp (p
, "core", p1
- p
) == 0)
5105 p
= unpack_varlen_hex (++p1
, &c
);
5110 /* Silently skip unknown optional info. */
5111 p_temp
= strchr (p1
+ 1, ';');
5118 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
5119 cached_reg_t cached_reg
;
5124 error (_("Malformed packet(b) (missing colon): %s\n\
5130 error (_("Remote sent bad register number %s: %s\n\
5132 hex_string (pnum
), p
, buf
);
5134 cached_reg
.num
= reg
->regnum
;
5136 fieldsize
= hex2bin (p
, cached_reg
.data
,
5137 register_size (target_gdbarch
,
5140 if (fieldsize
< register_size (target_gdbarch
,
5142 warning (_("Remote reply is too short: %s"), buf
);
5144 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
5148 error (_("Remote register badly formatted: %s\nhere: %s"),
5153 case 'S': /* Old style status, just signal only. */
5154 if (event
->solibs_changed
)
5155 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
5156 else if (event
->replay_event
)
5157 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
5160 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
5161 event
->ws
.value
.sig
= (enum target_signal
)
5162 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
5165 case 'W': /* Target exited. */
5172 /* GDB used to accept only 2 hex chars here. Stubs should
5173 only send more if they detect GDB supports multi-process
5175 p
= unpack_varlen_hex (&buf
[1], &value
);
5179 /* The remote process exited. */
5180 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
5181 event
->ws
.value
.integer
= value
;
5185 /* The remote process exited with a signal. */
5186 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
5187 event
->ws
.value
.sig
= (enum target_signal
) value
;
5190 /* If no process is specified, assume inferior_ptid. */
5191 pid
= ptid_get_pid (inferior_ptid
);
5200 else if (strncmp (p
,
5201 "process:", sizeof ("process:") - 1) == 0)
5205 p
+= sizeof ("process:") - 1;
5206 unpack_varlen_hex (p
, &upid
);
5210 error (_("unknown stop reply packet: %s"), buf
);
5213 error (_("unknown stop reply packet: %s"), buf
);
5214 event
->ptid
= pid_to_ptid (pid
);
5219 if (non_stop
&& ptid_equal (event
->ptid
, null_ptid
))
5220 error (_("No process or thread specified in stop reply: %s"), buf
);
5223 /* When the stub wants to tell GDB about a new stop reply, it sends a
5224 stop notification (%Stop). Those can come it at any time, hence,
5225 we have to make sure that any pending putpkt/getpkt sequence we're
5226 making is finished, before querying the stub for more events with
5227 vStopped. E.g., if we started a vStopped sequence immediatelly
5228 upon receiving the %Stop notification, something like this could
5236 1.6) <-- (registers reply to step #1.3)
5238 Obviously, the reply in step #1.6 would be unexpected to a vStopped
5241 To solve this, whenever we parse a %Stop notification sucessfully,
5242 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
5243 doing whatever we were doing:
5249 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
5250 2.5) <-- (registers reply to step #2.3)
5252 Eventualy after step #2.5, we return to the event loop, which
5253 notices there's an event on the
5254 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
5255 associated callback --- the function below. At this point, we're
5256 always safe to start a vStopped sequence. :
5259 2.7) <-- T05 thread:2
5265 remote_get_pending_stop_replies (void)
5267 struct remote_state
*rs
= get_remote_state ();
5269 if (pending_stop_reply
)
5272 putpkt ("vStopped");
5274 /* Now we can rely on it. */
5275 push_stop_reply (pending_stop_reply
);
5276 pending_stop_reply
= NULL
;
5280 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5281 if (strcmp (rs
->buf
, "OK") == 0)
5285 struct cleanup
*old_chain
;
5286 struct stop_reply
*stop_reply
= stop_reply_xmalloc ();
5288 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
5289 remote_parse_stop_reply (rs
->buf
, stop_reply
);
5292 putpkt ("vStopped");
5294 if (stop_reply
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
5296 /* Now we can rely on it. */
5297 discard_cleanups (old_chain
);
5298 push_stop_reply (stop_reply
);
5301 /* We got an unknown stop reply. */
5302 do_cleanups (old_chain
);
5309 /* Called when it is decided that STOP_REPLY holds the info of the
5310 event that is to be returned to the core. This function always
5311 destroys STOP_REPLY. */
5314 process_stop_reply (struct stop_reply
*stop_reply
,
5315 struct target_waitstatus
*status
)
5319 *status
= stop_reply
->ws
;
5320 ptid
= stop_reply
->ptid
;
5322 /* If no thread/process was reported by the stub, assume the current
5324 if (ptid_equal (ptid
, null_ptid
))
5325 ptid
= inferior_ptid
;
5327 if (status
->kind
!= TARGET_WAITKIND_EXITED
5328 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
5330 /* Expedited registers. */
5331 if (stop_reply
->regcache
)
5333 struct regcache
*regcache
5334 = get_thread_arch_regcache (ptid
, target_gdbarch
);
5339 VEC_iterate(cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
5341 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
5342 VEC_free (cached_reg_t
, stop_reply
->regcache
);
5345 remote_stopped_by_watchpoint_p
= stop_reply
->stopped_by_watchpoint_p
;
5346 remote_watch_data_address
= stop_reply
->watch_data_address
;
5348 remote_notice_new_inferior (ptid
, 0);
5349 demand_private_info (ptid
)->core
= stop_reply
->core
;
5352 stop_reply_xfree (stop_reply
);
5356 /* The non-stop mode version of target_wait. */
5359 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
5361 struct remote_state
*rs
= get_remote_state ();
5362 struct stop_reply
*stop_reply
;
5365 /* If in non-stop mode, get out of getpkt even if a
5366 notification is received. */
5368 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
5375 case 'E': /* Error of some sort. */
5376 /* We're out of sync with the target now. Did it continue
5377 or not? We can't tell which thread it was in non-stop,
5378 so just ignore this. */
5379 warning (_("Remote failure reply: %s"), rs
->buf
);
5381 case 'O': /* Console output. */
5382 remote_console_output (rs
->buf
+ 1);
5385 warning (_("Invalid remote reply: %s"), rs
->buf
);
5389 /* Acknowledge a pending stop reply that may have arrived in the
5391 if (pending_stop_reply
!= NULL
)
5392 remote_get_pending_stop_replies ();
5394 /* If indeed we noticed a stop reply, we're done. */
5395 stop_reply
= queued_stop_reply (ptid
);
5396 if (stop_reply
!= NULL
)
5397 return process_stop_reply (stop_reply
, status
);
5399 /* Still no event. If we're just polling for an event, then
5400 return to the event loop. */
5401 if (options
& TARGET_WNOHANG
)
5403 status
->kind
= TARGET_WAITKIND_IGNORE
;
5404 return minus_one_ptid
;
5407 /* Otherwise do a blocking wait. */
5408 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
5413 /* Wait until the remote machine stops, then return, storing status in
5414 STATUS just as `wait' would. */
5417 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
5419 struct remote_state
*rs
= get_remote_state ();
5420 ptid_t event_ptid
= null_ptid
;
5422 struct stop_reply
*stop_reply
;
5426 status
->kind
= TARGET_WAITKIND_IGNORE
;
5427 status
->value
.integer
= 0;
5429 stop_reply
= queued_stop_reply (ptid
);
5430 if (stop_reply
!= NULL
)
5431 return process_stop_reply (stop_reply
, status
);
5433 if (rs
->cached_wait_status
)
5434 /* Use the cached wait status, but only once. */
5435 rs
->cached_wait_status
= 0;
5440 if (!target_is_async_p ())
5442 ofunc
= signal (SIGINT
, remote_interrupt
);
5443 /* If the user hit C-c before this packet, or between packets,
5444 pretend that it was hit right here. */
5448 remote_interrupt (SIGINT
);
5452 /* FIXME: cagney/1999-09-27: If we're in async mode we should
5453 _never_ wait for ever -> test on target_is_async_p().
5454 However, before we do that we need to ensure that the caller
5455 knows how to take the target into/out of async mode. */
5456 ret
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, wait_forever_enabled_p
);
5457 if (!target_is_async_p ())
5458 signal (SIGINT
, ofunc
);
5463 remote_stopped_by_watchpoint_p
= 0;
5465 /* We got something. */
5466 rs
->waiting_for_stop_reply
= 0;
5468 /* Assume that the target has acknowledged Ctrl-C unless we receive
5469 an 'F' or 'O' packet. */
5470 if (buf
[0] != 'F' && buf
[0] != 'O')
5471 rs
->ctrlc_pending_p
= 0;
5475 case 'E': /* Error of some sort. */
5476 /* We're out of sync with the target now. Did it continue or
5477 not? Not is more likely, so report a stop. */
5478 warning (_("Remote failure reply: %s"), buf
);
5479 status
->kind
= TARGET_WAITKIND_STOPPED
;
5480 status
->value
.sig
= TARGET_SIGNAL_0
;
5482 case 'F': /* File-I/O request. */
5483 remote_fileio_request (buf
, rs
->ctrlc_pending_p
);
5484 rs
->ctrlc_pending_p
= 0;
5486 case 'T': case 'S': case 'X': case 'W':
5488 struct stop_reply
*stop_reply
;
5489 struct cleanup
*old_chain
;
5491 stop_reply
= stop_reply_xmalloc ();
5492 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
5493 remote_parse_stop_reply (buf
, stop_reply
);
5494 discard_cleanups (old_chain
);
5495 event_ptid
= process_stop_reply (stop_reply
, status
);
5498 case 'O': /* Console output. */
5499 remote_console_output (buf
+ 1);
5501 /* The target didn't really stop; keep waiting. */
5502 rs
->waiting_for_stop_reply
= 1;
5506 if (last_sent_signal
!= TARGET_SIGNAL_0
)
5508 /* Zero length reply means that we tried 'S' or 'C' and the
5509 remote system doesn't support it. */
5510 target_terminal_ours_for_output ();
5512 ("Can't send signals to this remote system. %s not sent.\n",
5513 target_signal_to_name (last_sent_signal
));
5514 last_sent_signal
= TARGET_SIGNAL_0
;
5515 target_terminal_inferior ();
5517 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
5518 putpkt ((char *) buf
);
5520 /* We just told the target to resume, so a stop reply is in
5522 rs
->waiting_for_stop_reply
= 1;
5525 /* else fallthrough */
5527 warning (_("Invalid remote reply: %s"), buf
);
5529 rs
->waiting_for_stop_reply
= 1;
5533 if (status
->kind
== TARGET_WAITKIND_IGNORE
)
5535 /* Nothing interesting happened. If we're doing a non-blocking
5536 poll, we're done. Otherwise, go back to waiting. */
5537 if (options
& TARGET_WNOHANG
)
5538 return minus_one_ptid
;
5542 else if (status
->kind
!= TARGET_WAITKIND_EXITED
5543 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
5545 if (!ptid_equal (event_ptid
, null_ptid
))
5546 record_currthread (event_ptid
);
5548 event_ptid
= inferior_ptid
;
5551 /* A process exit. Invalidate our notion of current thread. */
5552 record_currthread (minus_one_ptid
);
5557 /* Wait until the remote machine stops, then return, storing status in
5558 STATUS just as `wait' would. */
5561 remote_wait (struct target_ops
*ops
,
5562 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
5567 event_ptid
= remote_wait_ns (ptid
, status
, options
);
5569 event_ptid
= remote_wait_as (ptid
, status
, options
);
5571 if (target_can_async_p ())
5573 /* If there are are events left in the queue tell the event loop
5575 if (stop_reply_queue
)
5576 mark_async_event_handler (remote_async_inferior_event_token
);
5582 /* Fetch a single register using a 'p' packet. */
5585 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
5587 struct remote_state
*rs
= get_remote_state ();
5589 char regp
[MAX_REGISTER_SIZE
];
5592 if (remote_protocol_packets
[PACKET_p
].support
== PACKET_DISABLE
)
5595 if (reg
->pnum
== -1)
5600 p
+= hexnumstr (p
, reg
->pnum
);
5603 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5607 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
5611 case PACKET_UNKNOWN
:
5614 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
5615 gdbarch_register_name (get_regcache_arch (regcache
),
5620 /* If this register is unfetchable, tell the regcache. */
5623 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
5627 /* Otherwise, parse and supply the value. */
5633 error (_("fetch_register_using_p: early buf termination"));
5635 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
5638 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
5642 /* Fetch the registers included in the target's 'g' packet. */
5645 send_g_packet (void)
5647 struct remote_state
*rs
= get_remote_state ();
5650 sprintf (rs
->buf
, "g");
5651 remote_send (&rs
->buf
, &rs
->buf_size
);
5653 /* We can get out of synch in various cases. If the first character
5654 in the buffer is not a hex character, assume that has happened
5655 and try to fetch another packet to read. */
5656 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
5657 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
5658 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
5659 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
5662 fprintf_unfiltered (gdb_stdlog
,
5663 "Bad register packet; fetching a new packet\n");
5664 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5667 buf_len
= strlen (rs
->buf
);
5669 /* Sanity check the received packet. */
5670 if (buf_len
% 2 != 0)
5671 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
5677 process_g_packet (struct regcache
*regcache
)
5679 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
5680 struct remote_state
*rs
= get_remote_state ();
5681 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5686 buf_len
= strlen (rs
->buf
);
5688 /* Further sanity checks, with knowledge of the architecture. */
5689 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
5690 error (_("Remote 'g' packet reply is too long: %s"), rs
->buf
);
5692 /* Save the size of the packet sent to us by the target. It is used
5693 as a heuristic when determining the max size of packets that the
5694 target can safely receive. */
5695 if (rsa
->actual_register_packet_size
== 0)
5696 rsa
->actual_register_packet_size
= buf_len
;
5698 /* If this is smaller than we guessed the 'g' packet would be,
5699 update our records. A 'g' reply that doesn't include a register's
5700 value implies either that the register is not available, or that
5701 the 'p' packet must be used. */
5702 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
5704 rsa
->sizeof_g_packet
= buf_len
/ 2;
5706 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
5708 if (rsa
->regs
[i
].pnum
== -1)
5711 if (rsa
->regs
[i
].offset
>= rsa
->sizeof_g_packet
)
5712 rsa
->regs
[i
].in_g_packet
= 0;
5714 rsa
->regs
[i
].in_g_packet
= 1;
5718 regs
= alloca (rsa
->sizeof_g_packet
);
5720 /* Unimplemented registers read as all bits zero. */
5721 memset (regs
, 0, rsa
->sizeof_g_packet
);
5723 /* Reply describes registers byte by byte, each byte encoded as two
5724 hex characters. Suck them all up, then supply them to the
5725 register cacheing/storage mechanism. */
5728 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
5730 if (p
[0] == 0 || p
[1] == 0)
5731 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
5732 internal_error (__FILE__
, __LINE__
,
5733 _("unexpected end of 'g' packet reply"));
5735 if (p
[0] == 'x' && p
[1] == 'x')
5736 regs
[i
] = 0; /* 'x' */
5738 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
5742 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
5744 struct packet_reg
*r
= &rsa
->regs
[i
];
5748 if (r
->offset
* 2 >= strlen (rs
->buf
))
5749 /* This shouldn't happen - we adjusted in_g_packet above. */
5750 internal_error (__FILE__
, __LINE__
,
5751 _("unexpected end of 'g' packet reply"));
5752 else if (rs
->buf
[r
->offset
* 2] == 'x')
5754 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
5755 /* The register isn't available, mark it as such (at
5756 the same time setting the value to zero). */
5757 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
5760 regcache_raw_supply (regcache
, r
->regnum
,
5767 fetch_registers_using_g (struct regcache
*regcache
)
5770 process_g_packet (regcache
);
5773 /* Make the remote selected traceframe match GDB's selected
5777 set_remote_traceframe (void)
5781 if (remote_traceframe_number
== get_traceframe_number ())
5784 /* Avoid recursion, remote_trace_find calls us again. */
5785 remote_traceframe_number
= get_traceframe_number ();
5787 newnum
= target_trace_find (tfind_number
,
5788 get_traceframe_number (), 0, 0, NULL
);
5790 /* Should not happen. If it does, all bets are off. */
5791 if (newnum
!= get_traceframe_number ())
5792 warning (_("could not set remote traceframe"));
5796 remote_fetch_registers (struct target_ops
*ops
,
5797 struct regcache
*regcache
, int regnum
)
5799 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5802 set_remote_traceframe ();
5803 set_general_thread (inferior_ptid
);
5807 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5809 gdb_assert (reg
!= NULL
);
5811 /* If this register might be in the 'g' packet, try that first -
5812 we are likely to read more than one register. If this is the
5813 first 'g' packet, we might be overly optimistic about its
5814 contents, so fall back to 'p'. */
5815 if (reg
->in_g_packet
)
5817 fetch_registers_using_g (regcache
);
5818 if (reg
->in_g_packet
)
5822 if (fetch_register_using_p (regcache
, reg
))
5825 /* This register is not available. */
5826 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
5831 fetch_registers_using_g (regcache
);
5833 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5834 if (!rsa
->regs
[i
].in_g_packet
)
5835 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
5837 /* This register is not available. */
5838 regcache_raw_supply (regcache
, i
, NULL
);
5842 /* Prepare to store registers. Since we may send them all (using a
5843 'G' request), we have to read out the ones we don't want to change
5847 remote_prepare_to_store (struct regcache
*regcache
)
5849 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5851 gdb_byte buf
[MAX_REGISTER_SIZE
];
5853 /* Make sure the entire registers array is valid. */
5854 switch (remote_protocol_packets
[PACKET_P
].support
)
5856 case PACKET_DISABLE
:
5857 case PACKET_SUPPORT_UNKNOWN
:
5858 /* Make sure all the necessary registers are cached. */
5859 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5860 if (rsa
->regs
[i
].in_g_packet
)
5861 regcache_raw_read (regcache
, rsa
->regs
[i
].regnum
, buf
);
5868 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
5869 packet was not recognized. */
5872 store_register_using_P (const struct regcache
*regcache
,
5873 struct packet_reg
*reg
)
5875 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
5876 struct remote_state
*rs
= get_remote_state ();
5877 /* Try storing a single register. */
5878 char *buf
= rs
->buf
;
5879 gdb_byte regp
[MAX_REGISTER_SIZE
];
5882 if (remote_protocol_packets
[PACKET_P
].support
== PACKET_DISABLE
)
5885 if (reg
->pnum
== -1)
5888 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
5889 p
= buf
+ strlen (buf
);
5890 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
5891 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
5893 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5895 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
5900 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
5901 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
5902 case PACKET_UNKNOWN
:
5905 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
5909 /* Store register REGNUM, or all registers if REGNUM == -1, from the
5910 contents of the register cache buffer. FIXME: ignores errors. */
5913 store_registers_using_G (const struct regcache
*regcache
)
5915 struct remote_state
*rs
= get_remote_state ();
5916 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5920 /* Extract all the registers in the regcache copying them into a
5925 regs
= alloca (rsa
->sizeof_g_packet
);
5926 memset (regs
, 0, rsa
->sizeof_g_packet
);
5927 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5929 struct packet_reg
*r
= &rsa
->regs
[i
];
5932 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
5936 /* Command describes registers byte by byte,
5937 each byte encoded as two hex characters. */
5940 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
5942 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
5944 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5945 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
5946 error (_("Could not write registers; remote failure reply '%s'"),
5950 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
5951 of the register cache buffer. FIXME: ignores errors. */
5954 remote_store_registers (struct target_ops
*ops
,
5955 struct regcache
*regcache
, int regnum
)
5957 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5960 set_remote_traceframe ();
5961 set_general_thread (inferior_ptid
);
5965 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5967 gdb_assert (reg
!= NULL
);
5969 /* Always prefer to store registers using the 'P' packet if
5970 possible; we often change only a small number of registers.
5971 Sometimes we change a larger number; we'd need help from a
5972 higher layer to know to use 'G'. */
5973 if (store_register_using_P (regcache
, reg
))
5976 /* For now, don't complain if we have no way to write the
5977 register. GDB loses track of unavailable registers too
5978 easily. Some day, this may be an error. We don't have
5979 any way to read the register, either... */
5980 if (!reg
->in_g_packet
)
5983 store_registers_using_G (regcache
);
5987 store_registers_using_G (regcache
);
5989 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5990 if (!rsa
->regs
[i
].in_g_packet
)
5991 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
5992 /* See above for why we do not issue an error here. */
5997 /* Return the number of hex digits in num. */
6000 hexnumlen (ULONGEST num
)
6004 for (i
= 0; num
!= 0; i
++)
6010 /* Set BUF to the minimum number of hex digits representing NUM. */
6013 hexnumstr (char *buf
, ULONGEST num
)
6015 int len
= hexnumlen (num
);
6017 return hexnumnstr (buf
, num
, len
);
6021 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
6024 hexnumnstr (char *buf
, ULONGEST num
, int width
)
6030 for (i
= width
- 1; i
>= 0; i
--)
6032 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
6039 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
6042 remote_address_masked (CORE_ADDR addr
)
6044 int address_size
= remote_address_size
;
6046 /* If "remoteaddresssize" was not set, default to target address size. */
6048 address_size
= gdbarch_addr_bit (target_gdbarch
);
6050 if (address_size
> 0
6051 && address_size
< (sizeof (ULONGEST
) * 8))
6053 /* Only create a mask when that mask can safely be constructed
6054 in a ULONGEST variable. */
6057 mask
= (mask
<< address_size
) - 1;
6063 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
6064 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
6065 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
6066 (which may be more than *OUT_LEN due to escape characters). The
6067 total number of bytes in the output buffer will be at most
6071 remote_escape_output (const gdb_byte
*buffer
, int len
,
6072 gdb_byte
*out_buf
, int *out_len
,
6075 int input_index
, output_index
;
6078 for (input_index
= 0; input_index
< len
; input_index
++)
6080 gdb_byte b
= buffer
[input_index
];
6082 if (b
== '$' || b
== '#' || b
== '}')
6084 /* These must be escaped. */
6085 if (output_index
+ 2 > out_maxlen
)
6087 out_buf
[output_index
++] = '}';
6088 out_buf
[output_index
++] = b
^ 0x20;
6092 if (output_index
+ 1 > out_maxlen
)
6094 out_buf
[output_index
++] = b
;
6098 *out_len
= input_index
;
6099 return output_index
;
6102 /* Convert BUFFER, escaped data LEN bytes long, into binary data
6103 in OUT_BUF. Return the number of bytes written to OUT_BUF.
6104 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
6106 This function reverses remote_escape_output. It allows more
6107 escaped characters than that function does, in particular because
6108 '*' must be escaped to avoid the run-length encoding processing
6109 in reading packets. */
6112 remote_unescape_input (const gdb_byte
*buffer
, int len
,
6113 gdb_byte
*out_buf
, int out_maxlen
)
6115 int input_index
, output_index
;
6120 for (input_index
= 0; input_index
< len
; input_index
++)
6122 gdb_byte b
= buffer
[input_index
];
6124 if (output_index
+ 1 > out_maxlen
)
6126 warning (_("Received too much data from remote target;"
6127 " ignoring overflow."));
6128 return output_index
;
6133 out_buf
[output_index
++] = b
^ 0x20;
6139 out_buf
[output_index
++] = b
;
6143 error (_("Unmatched escape character in target response."));
6145 return output_index
;
6148 /* Determine whether the remote target supports binary downloading.
6149 This is accomplished by sending a no-op memory write of zero length
6150 to the target at the specified address. It does not suffice to send
6151 the whole packet, since many stubs strip the eighth bit and
6152 subsequently compute a wrong checksum, which causes real havoc with
6155 NOTE: This can still lose if the serial line is not eight-bit
6156 clean. In cases like this, the user should clear "remote
6160 check_binary_download (CORE_ADDR addr
)
6162 struct remote_state
*rs
= get_remote_state ();
6164 switch (remote_protocol_packets
[PACKET_X
].support
)
6166 case PACKET_DISABLE
:
6170 case PACKET_SUPPORT_UNKNOWN
:
6176 p
+= hexnumstr (p
, (ULONGEST
) addr
);
6178 p
+= hexnumstr (p
, (ULONGEST
) 0);
6182 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
6183 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6185 if (rs
->buf
[0] == '\0')
6188 fprintf_unfiltered (gdb_stdlog
,
6189 "binary downloading NOT "
6190 "supported by target\n");
6191 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
6196 fprintf_unfiltered (gdb_stdlog
,
6197 "binary downloading suppported by target\n");
6198 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
6205 /* Write memory data directly to the remote machine.
6206 This does not inform the data cache; the data cache uses this.
6207 HEADER is the starting part of the packet.
6208 MEMADDR is the address in the remote memory space.
6209 MYADDR is the address of the buffer in our space.
6210 LEN is the number of bytes.
6211 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
6212 should send data as binary ('X'), or hex-encoded ('M').
6214 The function creates packet of the form
6215 <HEADER><ADDRESS>,<LENGTH>:<DATA>
6217 where encoding of <DATA> is termined by PACKET_FORMAT.
6219 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
6222 Returns the number of bytes transferred, or 0 (setting errno) for
6223 error. Only transfer a single packet. */
6226 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
6227 const gdb_byte
*myaddr
, int len
,
6228 char packet_format
, int use_length
)
6230 struct remote_state
*rs
= get_remote_state ();
6240 if (packet_format
!= 'X' && packet_format
!= 'M')
6241 internal_error (__FILE__
, __LINE__
,
6242 _("remote_write_bytes_aux: bad packet format"));
6247 payload_size
= get_memory_write_packet_size ();
6249 /* The packet buffer will be large enough for the payload;
6250 get_memory_packet_size ensures this. */
6253 /* Compute the size of the actual payload by subtracting out the
6254 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
6256 payload_size
-= strlen ("$,:#NN");
6258 /* The comma won't be used. */
6260 header_length
= strlen (header
);
6261 payload_size
-= header_length
;
6262 payload_size
-= hexnumlen (memaddr
);
6264 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
6266 strcat (rs
->buf
, header
);
6267 p
= rs
->buf
+ strlen (header
);
6269 /* Compute a best guess of the number of bytes actually transfered. */
6270 if (packet_format
== 'X')
6272 /* Best guess at number of bytes that will fit. */
6273 todo
= min (len
, payload_size
);
6275 payload_size
-= hexnumlen (todo
);
6276 todo
= min (todo
, payload_size
);
6280 /* Num bytes that will fit. */
6281 todo
= min (len
, payload_size
/ 2);
6283 payload_size
-= hexnumlen (todo
);
6284 todo
= min (todo
, payload_size
/ 2);
6288 internal_error (__FILE__
, __LINE__
,
6289 _("minumum packet size too small to write data"));
6291 /* If we already need another packet, then try to align the end
6292 of this packet to a useful boundary. */
6293 if (todo
> 2 * REMOTE_ALIGN_WRITES
&& todo
< len
)
6294 todo
= ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
6296 /* Append "<memaddr>". */
6297 memaddr
= remote_address_masked (memaddr
);
6298 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
6305 /* Append <len>. Retain the location/size of <len>. It may need to
6306 be adjusted once the packet body has been created. */
6308 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
6316 /* Append the packet body. */
6317 if (packet_format
== 'X')
6319 /* Binary mode. Send target system values byte by byte, in
6320 increasing byte addresses. Only escape certain critical
6322 payload_length
= remote_escape_output (myaddr
, todo
, p
, &nr_bytes
,
6325 /* If not all TODO bytes fit, then we'll need another packet. Make
6326 a second try to keep the end of the packet aligned. Don't do
6327 this if the packet is tiny. */
6328 if (nr_bytes
< todo
&& nr_bytes
> 2 * REMOTE_ALIGN_WRITES
)
6332 new_nr_bytes
= (((memaddr
+ nr_bytes
) & ~(REMOTE_ALIGN_WRITES
- 1))
6334 if (new_nr_bytes
!= nr_bytes
)
6335 payload_length
= remote_escape_output (myaddr
, new_nr_bytes
,
6340 p
+= payload_length
;
6341 if (use_length
&& nr_bytes
< todo
)
6343 /* Escape chars have filled up the buffer prematurely,
6344 and we have actually sent fewer bytes than planned.
6345 Fix-up the length field of the packet. Use the same
6346 number of characters as before. */
6347 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
6348 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
6353 /* Normal mode: Send target system values byte by byte, in
6354 increasing byte addresses. Each byte is encoded as a two hex
6356 nr_bytes
= bin2hex (myaddr
, p
, todo
);
6360 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
6361 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6363 if (rs
->buf
[0] == 'E')
6365 /* There is no correspondance between what the remote protocol
6366 uses for errors and errno codes. We would like a cleaner way
6367 of representing errors (big enough to include errno codes,
6368 bfd_error codes, and others). But for now just return EIO. */
6373 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
6374 fewer bytes than we'd planned. */
6378 /* Write memory data directly to the remote machine.
6379 This does not inform the data cache; the data cache uses this.
6380 MEMADDR is the address in the remote memory space.
6381 MYADDR is the address of the buffer in our space.
6382 LEN is the number of bytes.
6384 Returns number of bytes transferred, or 0 (setting errno) for
6385 error. Only transfer a single packet. */
6388 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, int len
)
6390 char *packet_format
= 0;
6392 /* Check whether the target supports binary download. */
6393 check_binary_download (memaddr
);
6395 switch (remote_protocol_packets
[PACKET_X
].support
)
6398 packet_format
= "X";
6400 case PACKET_DISABLE
:
6401 packet_format
= "M";
6403 case PACKET_SUPPORT_UNKNOWN
:
6404 internal_error (__FILE__
, __LINE__
,
6405 _("remote_write_bytes: bad internal state"));
6407 internal_error (__FILE__
, __LINE__
, _("bad switch"));
6410 return remote_write_bytes_aux (packet_format
,
6411 memaddr
, myaddr
, len
, packet_format
[0], 1);
6414 /* Read memory data directly from the remote machine.
6415 This does not use the data cache; the data cache uses this.
6416 MEMADDR is the address in the remote memory space.
6417 MYADDR is the address of the buffer in our space.
6418 LEN is the number of bytes.
6420 Returns number of bytes transferred, or 0 for error. */
6423 remote_read_bytes (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
6425 struct remote_state
*rs
= get_remote_state ();
6426 int max_buf_size
; /* Max size of packet output buffer. */
6434 max_buf_size
= get_memory_read_packet_size ();
6435 /* The packet buffer will be large enough for the payload;
6436 get_memory_packet_size ensures this. */
6438 /* Number if bytes that will fit. */
6439 todo
= min (len
, max_buf_size
/ 2);
6441 /* Construct "m"<memaddr>","<len>". */
6442 memaddr
= remote_address_masked (memaddr
);
6445 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
6447 p
+= hexnumstr (p
, (ULONGEST
) todo
);
6450 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6451 if (rs
->buf
[0] == 'E'
6452 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
6453 && rs
->buf
[3] == '\0')
6455 /* There is no correspondance between what the remote protocol
6456 uses for errors and errno codes. We would like a cleaner way
6457 of representing errors (big enough to include errno codes,
6458 bfd_error codes, and others). But for now just return
6463 /* Reply describes memory byte by byte, each byte encoded as two hex
6466 i
= hex2bin (p
, myaddr
, todo
);
6467 /* Return what we have. Let higher layers handle partial reads. */
6472 /* Remote notification handler. */
6475 handle_notification (char *buf
, size_t length
)
6477 if (strncmp (buf
, "Stop:", 5) == 0)
6479 if (pending_stop_reply
)
6481 /* We've already parsed the in-flight stop-reply, but the
6482 stub for some reason thought we didn't, possibly due to
6483 timeout on its side. Just ignore it. */
6485 fprintf_unfiltered (gdb_stdlog
, "ignoring resent notification\n");
6489 struct cleanup
*old_chain
;
6490 struct stop_reply
*reply
= stop_reply_xmalloc ();
6492 old_chain
= make_cleanup (do_stop_reply_xfree
, reply
);
6494 remote_parse_stop_reply (buf
+ 5, reply
);
6496 discard_cleanups (old_chain
);
6498 /* Be careful to only set it after parsing, since an error
6499 may be thrown then. */
6500 pending_stop_reply
= reply
;
6502 /* Notify the event loop there's a stop reply to acknowledge
6503 and that there may be more events to fetch. */
6504 mark_async_event_handler (remote_async_get_pending_events_token
);
6507 fprintf_unfiltered (gdb_stdlog
, "stop notification captured\n");
6511 /* We ignore notifications we don't recognize, for compatibility
6512 with newer stubs. */
6517 /* Read or write LEN bytes from inferior memory at MEMADDR,
6518 transferring to or from debugger address BUFFER. Write to inferior
6519 if SHOULD_WRITE is nonzero. Returns length of data written or
6520 read; 0 for error. TARGET is unused. */
6523 remote_xfer_memory (CORE_ADDR mem_addr
, gdb_byte
*buffer
, int mem_len
,
6524 int should_write
, struct mem_attrib
*attrib
,
6525 struct target_ops
*target
)
6529 set_remote_traceframe ();
6530 set_general_thread (inferior_ptid
);
6533 res
= remote_write_bytes (mem_addr
, buffer
, mem_len
);
6535 res
= remote_read_bytes (mem_addr
, buffer
, mem_len
);
6540 /* Sends a packet with content determined by the printf format string
6541 FORMAT and the remaining arguments, then gets the reply. Returns
6542 whether the packet was a success, a failure, or unknown. */
6544 static enum packet_result
6545 remote_send_printf (const char *format
, ...)
6547 struct remote_state
*rs
= get_remote_state ();
6548 int max_size
= get_remote_packet_size ();
6551 va_start (ap
, format
);
6554 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
6555 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
6557 if (putpkt (rs
->buf
) < 0)
6558 error (_("Communication problem with target."));
6561 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6563 return packet_check_result (rs
->buf
);
6567 restore_remote_timeout (void *p
)
6569 int value
= *(int *)p
;
6571 remote_timeout
= value
;
6574 /* Flash writing can take quite some time. We'll set
6575 effectively infinite timeout for flash operations.
6576 In future, we'll need to decide on a better approach. */
6577 static const int remote_flash_timeout
= 1000;
6580 remote_flash_erase (struct target_ops
*ops
,
6581 ULONGEST address
, LONGEST length
)
6583 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
6584 int saved_remote_timeout
= remote_timeout
;
6585 enum packet_result ret
;
6586 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
6587 &saved_remote_timeout
);
6589 remote_timeout
= remote_flash_timeout
;
6591 ret
= remote_send_printf ("vFlashErase:%s,%s",
6592 phex (address
, addr_size
),
6596 case PACKET_UNKNOWN
:
6597 error (_("Remote target does not support flash erase"));
6599 error (_("Error erasing flash with vFlashErase packet"));
6604 do_cleanups (back_to
);
6608 remote_flash_write (struct target_ops
*ops
,
6609 ULONGEST address
, LONGEST length
,
6610 const gdb_byte
*data
)
6612 int saved_remote_timeout
= remote_timeout
;
6614 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
6615 &saved_remote_timeout
);
6617 remote_timeout
= remote_flash_timeout
;
6618 ret
= remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 'X', 0);
6619 do_cleanups (back_to
);
6625 remote_flash_done (struct target_ops
*ops
)
6627 int saved_remote_timeout
= remote_timeout
;
6629 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
6630 &saved_remote_timeout
);
6632 remote_timeout
= remote_flash_timeout
;
6633 ret
= remote_send_printf ("vFlashDone");
6634 do_cleanups (back_to
);
6638 case PACKET_UNKNOWN
:
6639 error (_("Remote target does not support vFlashDone"));
6641 error (_("Error finishing flash operation"));
6648 remote_files_info (struct target_ops
*ignore
)
6650 puts_filtered ("Debugging a target over a serial line.\n");
6653 /* Stuff for dealing with the packets which are part of this protocol.
6654 See comment at top of file for details. */
6656 /* Read a single character from the remote end. */
6659 readchar (int timeout
)
6663 ch
= serial_readchar (remote_desc
, timeout
);
6668 switch ((enum serial_rc
) ch
)
6672 error (_("Remote connection closed"));
6676 perror_with_name (_("Remote communication error. "
6677 "Target disconnected."));
6679 case SERIAL_TIMEOUT
:
6685 /* Send the command in *BUF to the remote machine, and read the reply
6686 into *BUF. Report an error if we get an error reply. Resize
6687 *BUF using xrealloc if necessary to hold the result, and update
6691 remote_send (char **buf
,
6695 getpkt (buf
, sizeof_buf
, 0);
6697 if ((*buf
)[0] == 'E')
6698 error (_("Remote failure reply: %s"), *buf
);
6701 /* Return a pointer to an xmalloc'ed string representing an escaped
6702 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
6703 etc. The caller is responsible for releasing the returned
6707 escape_buffer (const char *buf
, int n
)
6709 struct cleanup
*old_chain
;
6710 struct ui_file
*stb
;
6713 stb
= mem_fileopen ();
6714 old_chain
= make_cleanup_ui_file_delete (stb
);
6716 fputstrn_unfiltered (buf
, n
, 0, stb
);
6717 str
= ui_file_xstrdup (stb
, NULL
);
6718 do_cleanups (old_chain
);
6722 /* Display a null-terminated packet on stdout, for debugging, using C
6726 print_packet (char *buf
)
6728 puts_filtered ("\"");
6729 fputstr_filtered (buf
, '"', gdb_stdout
);
6730 puts_filtered ("\"");
6736 return putpkt_binary (buf
, strlen (buf
));
6739 /* Send a packet to the remote machine, with error checking. The data
6740 of the packet is in BUF. The string in BUF can be at most
6741 get_remote_packet_size () - 5 to account for the $, # and checksum,
6742 and for a possible /0 if we are debugging (remote_debug) and want
6743 to print the sent packet as a string. */
6746 putpkt_binary (char *buf
, int cnt
)
6748 struct remote_state
*rs
= get_remote_state ();
6750 unsigned char csum
= 0;
6751 char *buf2
= alloca (cnt
+ 6);
6757 /* Catch cases like trying to read memory or listing threads while
6758 we're waiting for a stop reply. The remote server wouldn't be
6759 ready to handle this request, so we'd hang and timeout. We don't
6760 have to worry about this in synchronous mode, because in that
6761 case it's not possible to issue a command while the target is
6762 running. This is not a problem in non-stop mode, because in that
6763 case, the stub is always ready to process serial input. */
6764 if (!non_stop
&& target_can_async_p () && rs
->waiting_for_stop_reply
)
6765 error (_("Cannot execute this command while the target is running."));
6767 /* We're sending out a new packet. Make sure we don't look at a
6768 stale cached response. */
6769 rs
->cached_wait_status
= 0;
6771 /* Copy the packet into buffer BUF2, encapsulating it
6772 and giving it a checksum. */
6777 for (i
= 0; i
< cnt
; i
++)
6783 *p
++ = tohex ((csum
>> 4) & 0xf);
6784 *p
++ = tohex (csum
& 0xf);
6786 /* Send it over and over until we get a positive ack. */
6790 int started_error_output
= 0;
6794 struct cleanup
*old_chain
;
6798 str
= escape_buffer (buf2
, p
- buf2
);
6799 old_chain
= make_cleanup (xfree
, str
);
6800 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s...", str
);
6801 gdb_flush (gdb_stdlog
);
6802 do_cleanups (old_chain
);
6804 if (serial_write (remote_desc
, buf2
, p
- buf2
))
6805 perror_with_name (_("putpkt: write failed"));
6807 /* If this is a no acks version of the remote protocol, send the
6808 packet and move on. */
6812 /* Read until either a timeout occurs (-2) or '+' is read.
6813 Handle any notification that arrives in the mean time. */
6816 ch
= readchar (remote_timeout
);
6824 case SERIAL_TIMEOUT
:
6827 if (started_error_output
)
6829 putchar_unfiltered ('\n');
6830 started_error_output
= 0;
6839 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
6843 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
6845 case SERIAL_TIMEOUT
:
6849 break; /* Retransmit buffer. */
6853 fprintf_unfiltered (gdb_stdlog
,
6854 "Packet instead of Ack, ignoring it\n");
6855 /* It's probably an old response sent because an ACK
6856 was lost. Gobble up the packet and ack it so it
6857 doesn't get retransmitted when we resend this
6860 serial_write (remote_desc
, "+", 1);
6861 continue; /* Now, go look for +. */
6868 /* If we got a notification, handle it, and go back to looking
6870 /* We've found the start of a notification. Now
6871 collect the data. */
6872 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
6877 struct cleanup
*old_chain
;
6880 str
= escape_buffer (rs
->buf
, val
);
6881 old_chain
= make_cleanup (xfree
, str
);
6882 fprintf_unfiltered (gdb_stdlog
,
6883 " Notification received: %s\n",
6885 do_cleanups (old_chain
);
6887 handle_notification (rs
->buf
, val
);
6888 /* We're in sync now, rewait for the ack. */
6895 if (!started_error_output
)
6897 started_error_output
= 1;
6898 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6900 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6901 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
6910 if (!started_error_output
)
6912 started_error_output
= 1;
6913 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6915 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6919 break; /* Here to retransmit. */
6923 /* This is wrong. If doing a long backtrace, the user should be
6924 able to get out next time we call QUIT, without anything as
6925 violent as interrupt_query. If we want to provide a way out of
6926 here without getting to the next QUIT, it should be based on
6927 hitting ^C twice as in remote_wait. */
6938 /* Come here after finding the start of a frame when we expected an
6939 ack. Do our best to discard the rest of this packet. */
6948 c
= readchar (remote_timeout
);
6951 case SERIAL_TIMEOUT
:
6952 /* Nothing we can do. */
6955 /* Discard the two bytes of checksum and stop. */
6956 c
= readchar (remote_timeout
);
6958 c
= readchar (remote_timeout
);
6961 case '*': /* Run length encoding. */
6962 /* Discard the repeat count. */
6963 c
= readchar (remote_timeout
);
6968 /* A regular character. */
6974 /* Come here after finding the start of the frame. Collect the rest
6975 into *BUF, verifying the checksum, length, and handling run-length
6976 compression. NUL terminate the buffer. If there is not enough room,
6977 expand *BUF using xrealloc.
6979 Returns -1 on error, number of characters in buffer (ignoring the
6980 trailing NULL) on success. (could be extended to return one of the
6981 SERIAL status indications). */
6984 read_frame (char **buf_p
,
6991 struct remote_state
*rs
= get_remote_state ();
6998 c
= readchar (remote_timeout
);
7001 case SERIAL_TIMEOUT
:
7003 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
7007 fputs_filtered ("Saw new packet start in middle of old one\n",
7009 return -1; /* Start a new packet, count retries. */
7012 unsigned char pktcsum
;
7018 check_0
= readchar (remote_timeout
);
7020 check_1
= readchar (remote_timeout
);
7022 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
7025 fputs_filtered ("Timeout in checksum, retrying\n",
7029 else if (check_0
< 0 || check_1
< 0)
7032 fputs_filtered ("Communication error in checksum\n",
7037 /* Don't recompute the checksum; with no ack packets we
7038 don't have any way to indicate a packet retransmission
7043 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
7044 if (csum
== pktcsum
)
7049 struct cleanup
*old_chain
;
7052 str
= escape_buffer (buf
, bc
);
7053 old_chain
= make_cleanup (xfree
, str
);
7054 fprintf_unfiltered (gdb_stdlog
,
7055 "Bad checksum, sentsum=0x%x, "
7056 "csum=0x%x, buf=%s\n",
7057 pktcsum
, csum
, str
);
7058 do_cleanups (old_chain
);
7060 /* Number of characters in buffer ignoring trailing
7064 case '*': /* Run length encoding. */
7069 c
= readchar (remote_timeout
);
7071 repeat
= c
- ' ' + 3; /* Compute repeat count. */
7073 /* The character before ``*'' is repeated. */
7075 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
7077 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
7079 /* Make some more room in the buffer. */
7080 *sizeof_buf
+= repeat
;
7081 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
7085 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
7091 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
7095 if (bc
>= *sizeof_buf
- 1)
7097 /* Make some more room in the buffer. */
7099 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
7110 /* Read a packet from the remote machine, with error checking, and
7111 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
7112 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
7113 rather than timing out; this is used (in synchronous mode) to wait
7114 for a target that is is executing user code to stop. */
7115 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
7116 don't have to change all the calls to getpkt to deal with the
7117 return value, because at the moment I don't know what the right
7118 thing to do it for those. */
7126 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
7130 /* Read a packet from the remote machine, with error checking, and
7131 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
7132 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
7133 rather than timing out; this is used (in synchronous mode) to wait
7134 for a target that is is executing user code to stop. If FOREVER ==
7135 0, this function is allowed to time out gracefully and return an
7136 indication of this to the caller. Otherwise return the number of
7137 bytes read. If EXPECTING_NOTIF, consider receiving a notification
7138 enough reason to return to the caller. */
7141 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
7142 int expecting_notif
)
7144 struct remote_state
*rs
= get_remote_state ();
7150 /* We're reading a new response. Make sure we don't look at a
7151 previously cached response. */
7152 rs
->cached_wait_status
= 0;
7154 strcpy (*buf
, "timeout");
7157 timeout
= watchdog
> 0 ? watchdog
: -1;
7158 else if (expecting_notif
)
7159 timeout
= 0; /* There should already be a char in the buffer. If
7162 timeout
= remote_timeout
;
7166 /* Process any number of notifications, and then return when
7170 /* If we get a timeout or bad checksm, retry up to MAX_TRIES
7172 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
7174 /* This can loop forever if the remote side sends us
7175 characters continuously, but if it pauses, we'll get
7176 SERIAL_TIMEOUT from readchar because of timeout. Then
7177 we'll count that as a retry.
7179 Note that even when forever is set, we will only wait
7180 forever prior to the start of a packet. After that, we
7181 expect characters to arrive at a brisk pace. They should
7182 show up within remote_timeout intervals. */
7184 c
= readchar (timeout
);
7185 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
7187 if (c
== SERIAL_TIMEOUT
)
7189 if (expecting_notif
)
7190 return -1; /* Don't complain, it's normal to not get
7191 anything in this case. */
7193 if (forever
) /* Watchdog went off? Kill the target. */
7197 error (_("Watchdog timeout has expired. Target detached."));
7200 fputs_filtered ("Timed out.\n", gdb_stdlog
);
7204 /* We've found the start of a packet or notification.
7205 Now collect the data. */
7206 val
= read_frame (buf
, sizeof_buf
);
7211 serial_write (remote_desc
, "-", 1);
7214 if (tries
> MAX_TRIES
)
7216 /* We have tried hard enough, and just can't receive the
7217 packet/notification. Give up. */
7218 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
7220 /* Skip the ack char if we're in no-ack mode. */
7221 if (!rs
->noack_mode
)
7222 serial_write (remote_desc
, "+", 1);
7226 /* If we got an ordinary packet, return that to our caller. */
7231 struct cleanup
*old_chain
;
7234 str
= escape_buffer (*buf
, val
);
7235 old_chain
= make_cleanup (xfree
, str
);
7236 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s\n", str
);
7237 do_cleanups (old_chain
);
7240 /* Skip the ack char if we're in no-ack mode. */
7241 if (!rs
->noack_mode
)
7242 serial_write (remote_desc
, "+", 1);
7246 /* If we got a notification, handle it, and go back to looking
7250 gdb_assert (c
== '%');
7254 struct cleanup
*old_chain
;
7257 str
= escape_buffer (*buf
, val
);
7258 old_chain
= make_cleanup (xfree
, str
);
7259 fprintf_unfiltered (gdb_stdlog
,
7260 " Notification received: %s\n",
7262 do_cleanups (old_chain
);
7265 handle_notification (*buf
, val
);
7267 /* Notifications require no acknowledgement. */
7269 if (expecting_notif
)
7276 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
7278 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0);
7282 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
)
7284 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1);
7289 remote_kill (struct target_ops
*ops
)
7291 /* Use catch_errors so the user can quit from gdb even when we
7292 aren't on speaking terms with the remote system. */
7293 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
7295 /* Don't wait for it to die. I'm not really sure it matters whether
7296 we do or not. For the existing stubs, kill is a noop. */
7297 target_mourn_inferior ();
7301 remote_vkill (int pid
, struct remote_state
*rs
)
7303 if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
7306 /* Tell the remote target to detach. */
7307 sprintf (rs
->buf
, "vKill;%x", pid
);
7309 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7311 if (packet_ok (rs
->buf
,
7312 &remote_protocol_packets
[PACKET_vKill
]) == PACKET_OK
)
7314 else if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
7321 extended_remote_kill (struct target_ops
*ops
)
7324 int pid
= ptid_get_pid (inferior_ptid
);
7325 struct remote_state
*rs
= get_remote_state ();
7327 res
= remote_vkill (pid
, rs
);
7328 if (res
== -1 && !remote_multi_process_p (rs
))
7330 /* Don't try 'k' on a multi-process aware stub -- it has no way
7331 to specify the pid. */
7335 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7336 if (rs
->buf
[0] != 'O' || rs
->buf
[0] != 'K')
7339 /* Don't wait for it to die. I'm not really sure it matters whether
7340 we do or not. For the existing stubs, kill is a noop. */
7346 error (_("Can't kill process"));
7348 target_mourn_inferior ();
7352 remote_mourn (struct target_ops
*ops
)
7354 remote_mourn_1 (ops
);
7357 /* Worker function for remote_mourn. */
7359 remote_mourn_1 (struct target_ops
*target
)
7361 unpush_target (target
);
7363 /* remote_close takes care of doing most of the clean up. */
7364 generic_mourn_inferior ();
7368 extended_remote_mourn_1 (struct target_ops
*target
)
7370 struct remote_state
*rs
= get_remote_state ();
7372 /* In case we got here due to an error, but we're going to stay
7374 rs
->waiting_for_stop_reply
= 0;
7376 /* We're no longer interested in these events. */
7377 discard_pending_stop_replies (ptid_get_pid (inferior_ptid
));
7379 /* If the current general thread belonged to the process we just
7380 detached from or has exited, the remote side current general
7381 thread becomes undefined. Considering a case like this:
7383 - We just got here due to a detach.
7384 - The process that we're detaching from happens to immediately
7385 report a global breakpoint being hit in non-stop mode, in the
7386 same thread we had selected before.
7387 - GDB attaches to this process again.
7388 - This event happens to be the next event we handle.
7390 GDB would consider that the current general thread didn't need to
7391 be set on the stub side (with Hg), since for all it knew,
7392 GENERAL_THREAD hadn't changed.
7394 Notice that although in all-stop mode, the remote server always
7395 sets the current thread to the thread reporting the stop event,
7396 that doesn't happen in non-stop mode; in non-stop, the stub *must
7397 not* change the current thread when reporting a breakpoint hit,
7398 due to the decoupling of event reporting and event handling.
7400 To keep things simple, we always invalidate our notion of the
7402 record_currthread (minus_one_ptid
);
7404 /* Unlike "target remote", we do not want to unpush the target; then
7405 the next time the user says "run", we won't be connected. */
7407 /* Call common code to mark the inferior as not running. */
7408 generic_mourn_inferior ();
7410 if (!have_inferiors ())
7412 if (!remote_multi_process_p (rs
))
7414 /* Check whether the target is running now - some remote stubs
7415 automatically restart after kill. */
7417 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7419 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
7421 /* Assume that the target has been restarted. Set
7422 inferior_ptid so that bits of core GDB realizes
7423 there's something here, e.g., so that the user can
7424 say "kill" again. */
7425 inferior_ptid
= magic_null_ptid
;
7432 extended_remote_mourn (struct target_ops
*ops
)
7434 extended_remote_mourn_1 (ops
);
7438 extended_remote_run (char *args
)
7440 struct remote_state
*rs
= get_remote_state ();
7443 /* If the user has disabled vRun support, or we have detected that
7444 support is not available, do not try it. */
7445 if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
7448 strcpy (rs
->buf
, "vRun;");
7449 len
= strlen (rs
->buf
);
7451 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
7452 error (_("Remote file name too long for run packet"));
7453 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
, 0);
7455 gdb_assert (args
!= NULL
);
7458 struct cleanup
*back_to
;
7462 argv
= gdb_buildargv (args
);
7463 back_to
= make_cleanup ((void (*) (void *)) freeargv
, argv
);
7464 for (i
= 0; argv
[i
] != NULL
; i
++)
7466 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
7467 error (_("Argument list too long for run packet"));
7468 rs
->buf
[len
++] = ';';
7469 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
, 0);
7471 do_cleanups (back_to
);
7474 rs
->buf
[len
++] = '\0';
7477 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7479 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]) == PACKET_OK
)
7481 /* We have a wait response; we don't need it, though. All is well. */
7484 else if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
7485 /* It wasn't disabled before, but it is now. */
7489 if (remote_exec_file
[0] == '\0')
7490 error (_("Running the default executable on the remote target failed; "
7491 "try \"set remote exec-file\"?"));
7493 error (_("Running \"%s\" on the remote target failed"),
7498 /* In the extended protocol we want to be able to do things like
7499 "run" and have them basically work as expected. So we need
7500 a special create_inferior function. We support changing the
7501 executable file and the command line arguments, but not the
7505 extended_remote_create_inferior_1 (char *exec_file
, char *args
,
7506 char **env
, int from_tty
)
7508 /* If running asynchronously, register the target file descriptor
7509 with the event loop. */
7510 if (target_can_async_p ())
7511 target_async (inferior_event_handler
, 0);
7513 /* Now restart the remote server. */
7514 if (extended_remote_run (args
) == -1)
7516 /* vRun was not supported. Fail if we need it to do what the
7518 if (remote_exec_file
[0])
7519 error (_("Remote target does not support \"set remote exec-file\""));
7521 error (_("Remote target does not support \"set args\" or run <ARGS>"));
7523 /* Fall back to "R". */
7524 extended_remote_restart ();
7527 if (!have_inferiors ())
7529 /* Clean up from the last time we ran, before we mark the target
7530 running again. This will mark breakpoints uninserted, and
7531 get_offsets may insert breakpoints. */
7532 init_thread_list ();
7533 init_wait_for_inferior ();
7536 /* Now mark the inferior as running before we do anything else. */
7537 inferior_ptid
= magic_null_ptid
;
7539 /* Now, if we have thread information, update inferior_ptid. */
7540 inferior_ptid
= remote_current_thread (inferior_ptid
);
7542 remote_add_inferior (ptid_get_pid (inferior_ptid
), 0);
7543 add_thread_silent (inferior_ptid
);
7545 /* Get updated offsets, if the stub uses qOffsets. */
7550 extended_remote_create_inferior (struct target_ops
*ops
,
7551 char *exec_file
, char *args
,
7552 char **env
, int from_tty
)
7554 extended_remote_create_inferior_1 (exec_file
, args
, env
, from_tty
);
7558 /* Insert a breakpoint. On targets that have software breakpoint
7559 support, we ask the remote target to do the work; on targets
7560 which don't, we insert a traditional memory breakpoint. */
7563 remote_insert_breakpoint (struct gdbarch
*gdbarch
,
7564 struct bp_target_info
*bp_tgt
)
7566 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
7567 If it succeeds, then set the support to PACKET_ENABLE. If it
7568 fails, and the user has explicitly requested the Z support then
7569 report an error, otherwise, mark it disabled and go on. */
7571 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
7573 CORE_ADDR addr
= bp_tgt
->placed_address
;
7574 struct remote_state
*rs
;
7578 gdbarch_remote_breakpoint_from_pc (gdbarch
, &addr
, &bpsize
);
7580 rs
= get_remote_state ();
7586 addr
= (ULONGEST
) remote_address_masked (addr
);
7587 p
+= hexnumstr (p
, addr
);
7588 sprintf (p
, ",%d", bpsize
);
7591 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7593 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
7598 bp_tgt
->placed_address
= addr
;
7599 bp_tgt
->placed_size
= bpsize
;
7601 case PACKET_UNKNOWN
:
7606 return memory_insert_breakpoint (gdbarch
, bp_tgt
);
7610 remote_remove_breakpoint (struct gdbarch
*gdbarch
,
7611 struct bp_target_info
*bp_tgt
)
7613 CORE_ADDR addr
= bp_tgt
->placed_address
;
7614 struct remote_state
*rs
= get_remote_state ();
7616 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
7624 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
7625 p
+= hexnumstr (p
, addr
);
7626 sprintf (p
, ",%d", bp_tgt
->placed_size
);
7629 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7631 return (rs
->buf
[0] == 'E');
7634 return memory_remove_breakpoint (gdbarch
, bp_tgt
);
7638 watchpoint_to_Z_packet (int type
)
7643 return Z_PACKET_WRITE_WP
;
7646 return Z_PACKET_READ_WP
;
7649 return Z_PACKET_ACCESS_WP
;
7652 internal_error (__FILE__
, __LINE__
,
7653 _("hw_bp_to_z: bad watchpoint type %d"), type
);
7658 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
,
7659 struct expression
*cond
)
7661 struct remote_state
*rs
= get_remote_state ();
7663 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
7665 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
7668 sprintf (rs
->buf
, "Z%x,", packet
);
7669 p
= strchr (rs
->buf
, '\0');
7670 addr
= remote_address_masked (addr
);
7671 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7672 sprintf (p
, ",%x", len
);
7675 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7677 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
7681 case PACKET_UNKNOWN
:
7686 internal_error (__FILE__
, __LINE__
,
7687 _("remote_insert_watchpoint: reached end of function"));
7692 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
,
7693 struct expression
*cond
)
7695 struct remote_state
*rs
= get_remote_state ();
7697 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
7699 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
7702 sprintf (rs
->buf
, "z%x,", packet
);
7703 p
= strchr (rs
->buf
, '\0');
7704 addr
= remote_address_masked (addr
);
7705 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7706 sprintf (p
, ",%x", len
);
7708 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7710 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
7713 case PACKET_UNKNOWN
:
7718 internal_error (__FILE__
, __LINE__
,
7719 _("remote_remove_watchpoint: reached end of function"));
7723 int remote_hw_watchpoint_limit
= -1;
7724 int remote_hw_breakpoint_limit
= -1;
7727 remote_check_watch_resources (int type
, int cnt
, int ot
)
7729 if (type
== bp_hardware_breakpoint
)
7731 if (remote_hw_breakpoint_limit
== 0)
7733 else if (remote_hw_breakpoint_limit
< 0)
7735 else if (cnt
<= remote_hw_breakpoint_limit
)
7740 if (remote_hw_watchpoint_limit
== 0)
7742 else if (remote_hw_watchpoint_limit
< 0)
7746 else if (cnt
<= remote_hw_watchpoint_limit
)
7753 remote_stopped_by_watchpoint (void)
7755 return remote_stopped_by_watchpoint_p
;
7759 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
7763 if (remote_stopped_by_watchpoint ())
7765 *addr_p
= remote_watch_data_address
;
7774 remote_insert_hw_breakpoint (struct gdbarch
*gdbarch
,
7775 struct bp_target_info
*bp_tgt
)
7778 struct remote_state
*rs
;
7781 /* The length field should be set to the size of a breakpoint
7782 instruction, even though we aren't inserting one ourselves. */
7784 gdbarch_remote_breakpoint_from_pc
7785 (gdbarch
, &bp_tgt
->placed_address
, &bp_tgt
->placed_size
);
7787 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7790 rs
= get_remote_state ();
7797 addr
= remote_address_masked (bp_tgt
->placed_address
);
7798 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7799 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7802 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7804 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7807 case PACKET_UNKNOWN
:
7812 internal_error (__FILE__
, __LINE__
,
7813 _("remote_insert_hw_breakpoint: reached end of function"));
7818 remote_remove_hw_breakpoint (struct gdbarch
*gdbarch
,
7819 struct bp_target_info
*bp_tgt
)
7822 struct remote_state
*rs
= get_remote_state ();
7825 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7832 addr
= remote_address_masked (bp_tgt
->placed_address
);
7833 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7834 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7837 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7839 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7842 case PACKET_UNKNOWN
:
7847 internal_error (__FILE__
, __LINE__
,
7848 _("remote_remove_hw_breakpoint: reached end of function"));
7851 /* Table used by the crc32 function to calcuate the checksum. */
7853 static unsigned long crc32_table
[256] =
7856 static unsigned long
7857 crc32 (const unsigned char *buf
, int len
, unsigned int crc
)
7859 if (!crc32_table
[1])
7861 /* Initialize the CRC table and the decoding table. */
7865 for (i
= 0; i
< 256; i
++)
7867 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
7868 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
7875 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
7881 /* Verify memory using the "qCRC:" request. */
7884 remote_verify_memory (struct target_ops
*ops
,
7885 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
7887 struct remote_state
*rs
= get_remote_state ();
7888 unsigned long host_crc
, target_crc
;
7891 /* FIXME: assumes lma can fit into long. */
7892 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
7893 (long) lma
, (long) size
);
7896 /* Be clever; compute the host_crc before waiting for target
7898 host_crc
= crc32 (data
, size
, 0xffffffff);
7900 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7901 if (rs
->buf
[0] == 'E')
7904 if (rs
->buf
[0] != 'C')
7905 error (_("remote target does not support this operation"));
7907 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
7908 target_crc
= target_crc
* 16 + fromhex (*tmp
);
7910 return (host_crc
== target_crc
);
7913 /* compare-sections command
7915 With no arguments, compares each loadable section in the exec bfd
7916 with the same memory range on the target, and reports mismatches.
7917 Useful for verifying the image on the target against the exec file. */
7920 compare_sections_command (char *args
, int from_tty
)
7923 struct cleanup
*old_chain
;
7925 const char *sectname
;
7933 error (_("command cannot be used without an exec file"));
7935 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
7937 if (!(s
->flags
& SEC_LOAD
))
7938 continue; /* Skip non-loadable section. */
7940 size
= bfd_get_section_size (s
);
7942 continue; /* Skip zero-length section. */
7944 sectname
= bfd_get_section_name (exec_bfd
, s
);
7945 if (args
&& strcmp (args
, sectname
) != 0)
7946 continue; /* Not the section selected by user. */
7948 matched
= 1; /* Do this section. */
7951 sectdata
= xmalloc (size
);
7952 old_chain
= make_cleanup (xfree
, sectdata
);
7953 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
7955 res
= target_verify_memory (sectdata
, lma
, size
);
7958 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
7959 paddress (target_gdbarch
, lma
),
7960 paddress (target_gdbarch
, lma
+ size
));
7962 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
7963 paddress (target_gdbarch
, lma
),
7964 paddress (target_gdbarch
, lma
+ size
));
7966 printf_filtered ("matched.\n");
7969 printf_filtered ("MIS-MATCHED!\n");
7973 do_cleanups (old_chain
);
7976 warning (_("One or more sections of the remote executable does not match\n\
7977 the loaded file\n"));
7978 if (args
&& !matched
)
7979 printf_filtered (_("No loaded section named '%s'.\n"), args
);
7982 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
7983 into remote target. The number of bytes written to the remote
7984 target is returned, or -1 for error. */
7987 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
7988 const char *annex
, const gdb_byte
*writebuf
,
7989 ULONGEST offset
, LONGEST len
,
7990 struct packet_config
*packet
)
7994 struct remote_state
*rs
= get_remote_state ();
7995 int max_size
= get_memory_write_packet_size ();
7997 if (packet
->support
== PACKET_DISABLE
)
8000 /* Insert header. */
8001 i
= snprintf (rs
->buf
, max_size
,
8002 "qXfer:%s:write:%s:%s:",
8003 object_name
, annex
? annex
: "",
8004 phex_nz (offset
, sizeof offset
));
8005 max_size
-= (i
+ 1);
8007 /* Escape as much data as fits into rs->buf. */
8008 buf_len
= remote_escape_output
8009 (writebuf
, len
, (rs
->buf
+ i
), &max_size
, max_size
);
8011 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
8012 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
8013 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
8016 unpack_varlen_hex (rs
->buf
, &n
);
8020 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
8021 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
8022 number of bytes read is returned, or 0 for EOF, or -1 for error.
8023 The number of bytes read may be less than LEN without indicating an
8024 EOF. PACKET is checked and updated to indicate whether the remote
8025 target supports this object. */
8028 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
8030 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
8031 struct packet_config
*packet
)
8033 static char *finished_object
;
8034 static char *finished_annex
;
8035 static ULONGEST finished_offset
;
8037 struct remote_state
*rs
= get_remote_state ();
8038 LONGEST i
, n
, packet_len
;
8040 if (packet
->support
== PACKET_DISABLE
)
8043 /* Check whether we've cached an end-of-object packet that matches
8045 if (finished_object
)
8047 if (strcmp (object_name
, finished_object
) == 0
8048 && strcmp (annex
? annex
: "", finished_annex
) == 0
8049 && offset
== finished_offset
)
8052 /* Otherwise, we're now reading something different. Discard
8054 xfree (finished_object
);
8055 xfree (finished_annex
);
8056 finished_object
= NULL
;
8057 finished_annex
= NULL
;
8060 /* Request only enough to fit in a single packet. The actual data
8061 may not, since we don't know how much of it will need to be escaped;
8062 the target is free to respond with slightly less data. We subtract
8063 five to account for the response type and the protocol frame. */
8064 n
= min (get_remote_packet_size () - 5, len
);
8065 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
8066 object_name
, annex
? annex
: "",
8067 phex_nz (offset
, sizeof offset
),
8068 phex_nz (n
, sizeof n
));
8069 i
= putpkt (rs
->buf
);
8074 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
8075 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
8078 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
8079 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
8081 /* 'm' means there is (or at least might be) more data after this
8082 batch. That does not make sense unless there's at least one byte
8083 of data in this reply. */
8084 if (rs
->buf
[0] == 'm' && packet_len
== 1)
8085 error (_("Remote qXfer reply contained no data."));
8087 /* Got some data. */
8088 i
= remote_unescape_input (rs
->buf
+ 1, packet_len
- 1, readbuf
, n
);
8090 /* 'l' is an EOF marker, possibly including a final block of data,
8091 or possibly empty. If we have the final block of a non-empty
8092 object, record this fact to bypass a subsequent partial read. */
8093 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
8095 finished_object
= xstrdup (object_name
);
8096 finished_annex
= xstrdup (annex
? annex
: "");
8097 finished_offset
= offset
+ i
;
8104 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
8105 const char *annex
, gdb_byte
*readbuf
,
8106 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
8108 struct remote_state
*rs
;
8113 set_remote_traceframe ();
8114 set_general_thread (inferior_ptid
);
8116 rs
= get_remote_state ();
8118 /* Handle memory using the standard memory routines. */
8119 if (object
== TARGET_OBJECT_MEMORY
)
8125 /* If the remote target is connected but not running, we should
8126 pass this request down to a lower stratum (e.g. the executable
8128 if (!target_has_execution
)
8131 if (writebuf
!= NULL
)
8132 xfered
= remote_write_bytes (offset
, writebuf
, len
);
8134 xfered
= remote_read_bytes (offset
, readbuf
, len
);
8138 else if (xfered
== 0 && errno
== 0)
8144 /* Handle SPU memory using qxfer packets. */
8145 if (object
== TARGET_OBJECT_SPU
)
8148 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
8149 &remote_protocol_packets
8150 [PACKET_qXfer_spu_read
]);
8152 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
8153 &remote_protocol_packets
8154 [PACKET_qXfer_spu_write
]);
8157 /* Handle extra signal info using qxfer packets. */
8158 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
8161 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
8162 &remote_protocol_packets
8163 [PACKET_qXfer_siginfo_read
]);
8165 return remote_write_qxfer (ops
, "siginfo", annex
,
8166 writebuf
, offset
, len
,
8167 &remote_protocol_packets
8168 [PACKET_qXfer_siginfo_write
]);
8171 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
8174 return remote_read_qxfer (ops
, "statictrace", annex
,
8175 readbuf
, offset
, len
,
8176 &remote_protocol_packets
8177 [PACKET_qXfer_statictrace_read
]);
8182 /* Only handle flash writes. */
8183 if (writebuf
!= NULL
)
8189 case TARGET_OBJECT_FLASH
:
8190 xfered
= remote_flash_write (ops
, offset
, len
, writebuf
);
8194 else if (xfered
== 0 && errno
== 0)
8204 /* Map pre-existing objects onto letters. DO NOT do this for new
8205 objects!!! Instead specify new query packets. */
8208 case TARGET_OBJECT_AVR
:
8212 case TARGET_OBJECT_AUXV
:
8213 gdb_assert (annex
== NULL
);
8214 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
8215 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
8217 case TARGET_OBJECT_AVAILABLE_FEATURES
:
8218 return remote_read_qxfer
8219 (ops
, "features", annex
, readbuf
, offset
, len
,
8220 &remote_protocol_packets
[PACKET_qXfer_features
]);
8222 case TARGET_OBJECT_LIBRARIES
:
8223 return remote_read_qxfer
8224 (ops
, "libraries", annex
, readbuf
, offset
, len
,
8225 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
8227 case TARGET_OBJECT_MEMORY_MAP
:
8228 gdb_assert (annex
== NULL
);
8229 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
8230 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
8232 case TARGET_OBJECT_OSDATA
:
8233 /* Should only get here if we're connected. */
8234 gdb_assert (remote_desc
);
8235 return remote_read_qxfer
8236 (ops
, "osdata", annex
, readbuf
, offset
, len
,
8237 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
8239 case TARGET_OBJECT_THREADS
:
8240 gdb_assert (annex
== NULL
);
8241 return remote_read_qxfer (ops
, "threads", annex
, readbuf
, offset
, len
,
8242 &remote_protocol_packets
[PACKET_qXfer_threads
]);
8244 case TARGET_OBJECT_TRACEFRAME_INFO
:
8245 gdb_assert (annex
== NULL
);
8246 return remote_read_qxfer
8247 (ops
, "traceframe-info", annex
, readbuf
, offset
, len
,
8248 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
8253 /* Note: a zero OFFSET and LEN can be used to query the minimum
8255 if (offset
== 0 && len
== 0)
8256 return (get_remote_packet_size ());
8257 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
8258 large enough let the caller deal with it. */
8259 if (len
< get_remote_packet_size ())
8261 len
= get_remote_packet_size ();
8263 /* Except for querying the minimum buffer size, target must be open. */
8265 error (_("remote query is only available after target open"));
8267 gdb_assert (annex
!= NULL
);
8268 gdb_assert (readbuf
!= NULL
);
8274 /* We used one buffer char for the remote protocol q command and
8275 another for the query type. As the remote protocol encapsulation
8276 uses 4 chars plus one extra in case we are debugging
8277 (remote_debug), we have PBUFZIZ - 7 left to pack the query
8280 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
8282 /* Bad caller may have sent forbidden characters. */
8283 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
8288 gdb_assert (annex
[i
] == '\0');
8290 i
= putpkt (rs
->buf
);
8294 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8295 strcpy ((char *) readbuf
, rs
->buf
);
8297 return strlen ((char *) readbuf
);
8301 remote_search_memory (struct target_ops
* ops
,
8302 CORE_ADDR start_addr
, ULONGEST search_space_len
,
8303 const gdb_byte
*pattern
, ULONGEST pattern_len
,
8304 CORE_ADDR
*found_addrp
)
8306 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
8307 struct remote_state
*rs
= get_remote_state ();
8308 int max_size
= get_memory_write_packet_size ();
8309 struct packet_config
*packet
=
8310 &remote_protocol_packets
[PACKET_qSearch_memory
];
8311 /* Number of packet bytes used to encode the pattern;
8312 this could be more than PATTERN_LEN due to escape characters. */
8313 int escaped_pattern_len
;
8314 /* Amount of pattern that was encodable in the packet. */
8315 int used_pattern_len
;
8318 ULONGEST found_addr
;
8320 /* Don't go to the target if we don't have to.
8321 This is done before checking packet->support to avoid the possibility that
8322 a success for this edge case means the facility works in general. */
8323 if (pattern_len
> search_space_len
)
8325 if (pattern_len
== 0)
8327 *found_addrp
= start_addr
;
8331 /* If we already know the packet isn't supported, fall back to the simple
8332 way of searching memory. */
8334 if (packet
->support
== PACKET_DISABLE
)
8336 /* Target doesn't provided special support, fall back and use the
8337 standard support (copy memory and do the search here). */
8338 return simple_search_memory (ops
, start_addr
, search_space_len
,
8339 pattern
, pattern_len
, found_addrp
);
8342 /* Insert header. */
8343 i
= snprintf (rs
->buf
, max_size
,
8344 "qSearch:memory:%s;%s;",
8345 phex_nz (start_addr
, addr_size
),
8346 phex_nz (search_space_len
, sizeof (search_space_len
)));
8347 max_size
-= (i
+ 1);
8349 /* Escape as much data as fits into rs->buf. */
8350 escaped_pattern_len
=
8351 remote_escape_output (pattern
, pattern_len
, (rs
->buf
+ i
),
8352 &used_pattern_len
, max_size
);
8354 /* Bail if the pattern is too large. */
8355 if (used_pattern_len
!= pattern_len
)
8356 error (_("Pattern is too large to transmit to remote target."));
8358 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
8359 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
8360 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
8362 /* The request may not have worked because the command is not
8363 supported. If so, fall back to the simple way. */
8364 if (packet
->support
== PACKET_DISABLE
)
8366 return simple_search_memory (ops
, start_addr
, search_space_len
,
8367 pattern
, pattern_len
, found_addrp
);
8372 if (rs
->buf
[0] == '0')
8374 else if (rs
->buf
[0] == '1')
8377 if (rs
->buf
[1] != ',')
8378 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
8379 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
8380 *found_addrp
= found_addr
;
8383 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
8389 remote_rcmd (char *command
,
8390 struct ui_file
*outbuf
)
8392 struct remote_state
*rs
= get_remote_state ();
8396 error (_("remote rcmd is only available after target open"));
8398 /* Send a NULL command across as an empty command. */
8399 if (command
== NULL
)
8402 /* The query prefix. */
8403 strcpy (rs
->buf
, "qRcmd,");
8404 p
= strchr (rs
->buf
, '\0');
8406 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/)
8407 > get_remote_packet_size ())
8408 error (_("\"monitor\" command ``%s'' is too long."), command
);
8410 /* Encode the actual command. */
8411 bin2hex ((gdb_byte
*) command
, p
, 0);
8413 if (putpkt (rs
->buf
) < 0)
8414 error (_("Communication problem with target."));
8416 /* get/display the response */
8421 /* XXX - see also remote_get_noisy_reply(). */
8423 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8426 error (_("Target does not support this command."));
8427 if (buf
[0] == 'O' && buf
[1] != 'K')
8429 remote_console_output (buf
+ 1); /* 'O' message from stub. */
8432 if (strcmp (buf
, "OK") == 0)
8434 if (strlen (buf
) == 3 && buf
[0] == 'E'
8435 && isdigit (buf
[1]) && isdigit (buf
[2]))
8437 error (_("Protocol error with Rcmd"));
8439 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
8441 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
8443 fputc_unfiltered (c
, outbuf
);
8449 static VEC(mem_region_s
) *
8450 remote_memory_map (struct target_ops
*ops
)
8452 VEC(mem_region_s
) *result
= NULL
;
8453 char *text
= target_read_stralloc (¤t_target
,
8454 TARGET_OBJECT_MEMORY_MAP
, NULL
);
8458 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
8460 result
= parse_memory_map (text
);
8461 do_cleanups (back_to
);
8468 packet_command (char *args
, int from_tty
)
8470 struct remote_state
*rs
= get_remote_state ();
8473 error (_("command can only be used with remote target"));
8476 error (_("remote-packet command requires packet text as argument"));
8478 puts_filtered ("sending: ");
8479 print_packet (args
);
8480 puts_filtered ("\n");
8483 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8484 puts_filtered ("received: ");
8485 print_packet (rs
->buf
);
8486 puts_filtered ("\n");
8490 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
8492 static void display_thread_info (struct gdb_ext_thread_info
*info
);
8494 static void threadset_test_cmd (char *cmd
, int tty
);
8496 static void threadalive_test (char *cmd
, int tty
);
8498 static void threadlist_test_cmd (char *cmd
, int tty
);
8500 int get_and_display_threadinfo (threadref
*ref
);
8502 static void threadinfo_test_cmd (char *cmd
, int tty
);
8504 static int thread_display_step (threadref
*ref
, void *context
);
8506 static void threadlist_update_test_cmd (char *cmd
, int tty
);
8508 static void init_remote_threadtests (void);
8510 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
8513 threadset_test_cmd (char *cmd
, int tty
)
8515 int sample_thread
= SAMPLE_THREAD
;
8517 printf_filtered (_("Remote threadset test\n"));
8518 set_general_thread (sample_thread
);
8523 threadalive_test (char *cmd
, int tty
)
8525 int sample_thread
= SAMPLE_THREAD
;
8526 int pid
= ptid_get_pid (inferior_ptid
);
8527 ptid_t ptid
= ptid_build (pid
, 0, sample_thread
);
8529 if (remote_thread_alive (ptid
))
8530 printf_filtered ("PASS: Thread alive test\n");
8532 printf_filtered ("FAIL: Thread alive test\n");
8535 void output_threadid (char *title
, threadref
*ref
);
8538 output_threadid (char *title
, threadref
*ref
)
8542 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
8544 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
8548 threadlist_test_cmd (char *cmd
, int tty
)
8551 threadref nextthread
;
8552 int done
, result_count
;
8553 threadref threadlist
[3];
8555 printf_filtered ("Remote Threadlist test\n");
8556 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
8557 &result_count
, &threadlist
[0]))
8558 printf_filtered ("FAIL: threadlist test\n");
8561 threadref
*scan
= threadlist
;
8562 threadref
*limit
= scan
+ result_count
;
8564 while (scan
< limit
)
8565 output_threadid (" thread ", scan
++);
8570 display_thread_info (struct gdb_ext_thread_info
*info
)
8572 output_threadid ("Threadid: ", &info
->threadid
);
8573 printf_filtered ("Name: %s\n ", info
->shortname
);
8574 printf_filtered ("State: %s\n", info
->display
);
8575 printf_filtered ("other: %s\n\n", info
->more_display
);
8579 get_and_display_threadinfo (threadref
*ref
)
8583 struct gdb_ext_thread_info threadinfo
;
8585 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
8586 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
8587 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
8588 display_thread_info (&threadinfo
);
8593 threadinfo_test_cmd (char *cmd
, int tty
)
8595 int athread
= SAMPLE_THREAD
;
8599 int_to_threadref (&thread
, athread
);
8600 printf_filtered ("Remote Threadinfo test\n");
8601 if (!get_and_display_threadinfo (&thread
))
8602 printf_filtered ("FAIL cannot get thread info\n");
8606 thread_display_step (threadref
*ref
, void *context
)
8608 /* output_threadid(" threadstep ",ref); *//* simple test */
8609 return get_and_display_threadinfo (ref
);
8613 threadlist_update_test_cmd (char *cmd
, int tty
)
8615 printf_filtered ("Remote Threadlist update test\n");
8616 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
8620 init_remote_threadtests (void)
8622 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
8623 _("Fetch and print the remote list of "
8624 "thread identifiers, one pkt only"));
8625 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
8626 _("Fetch and display info about one thread"));
8627 add_com ("tset", class_obscure
, threadset_test_cmd
,
8628 _("Test setting to a different thread"));
8629 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
8630 _("Iterate through updating all remote thread info"));
8631 add_com ("talive", class_obscure
, threadalive_test
,
8632 _(" Remote thread alive test "));
8637 /* Convert a thread ID to a string. Returns the string in a static
8641 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
8643 static char buf
[64];
8644 struct remote_state
*rs
= get_remote_state ();
8646 if (ptid_is_pid (ptid
))
8648 /* Printing an inferior target id. */
8650 /* When multi-process extensions are off, there's no way in the
8651 remote protocol to know the remote process id, if there's any
8652 at all. There's one exception --- when we're connected with
8653 target extended-remote, and we manually attached to a process
8654 with "attach PID". We don't record anywhere a flag that
8655 allows us to distinguish that case from the case of
8656 connecting with extended-remote and the stub already being
8657 attached to a process, and reporting yes to qAttached, hence
8658 no smart special casing here. */
8659 if (!remote_multi_process_p (rs
))
8661 xsnprintf (buf
, sizeof buf
, "Remote target");
8665 return normal_pid_to_str (ptid
);
8669 if (ptid_equal (magic_null_ptid
, ptid
))
8670 xsnprintf (buf
, sizeof buf
, "Thread <main>");
8671 else if (remote_multi_process_p (rs
))
8672 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
8673 ptid_get_pid (ptid
), ptid_get_tid (ptid
));
8675 xsnprintf (buf
, sizeof buf
, "Thread %ld",
8676 ptid_get_tid (ptid
));
8681 /* Get the address of the thread local variable in OBJFILE which is
8682 stored at OFFSET within the thread local storage for thread PTID. */
8685 remote_get_thread_local_address (struct target_ops
*ops
,
8686 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
8688 if (remote_protocol_packets
[PACKET_qGetTLSAddr
].support
!= PACKET_DISABLE
)
8690 struct remote_state
*rs
= get_remote_state ();
8692 char *endp
= rs
->buf
+ get_remote_packet_size ();
8693 enum packet_result result
;
8695 strcpy (p
, "qGetTLSAddr:");
8697 p
= write_ptid (p
, endp
, ptid
);
8699 p
+= hexnumstr (p
, offset
);
8701 p
+= hexnumstr (p
, lm
);
8705 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8706 result
= packet_ok (rs
->buf
,
8707 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
8708 if (result
== PACKET_OK
)
8712 unpack_varlen_hex (rs
->buf
, &result
);
8715 else if (result
== PACKET_UNKNOWN
)
8716 throw_error (TLS_GENERIC_ERROR
,
8717 _("Remote target doesn't support qGetTLSAddr packet"));
8719 throw_error (TLS_GENERIC_ERROR
,
8720 _("Remote target failed to process qGetTLSAddr request"));
8723 throw_error (TLS_GENERIC_ERROR
,
8724 _("TLS not supported or disabled on this target"));
8729 /* Provide thread local base, i.e. Thread Information Block address.
8730 Returns 1 if ptid is found and thread_local_base is non zero. */
8733 remote_get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
8735 if (remote_protocol_packets
[PACKET_qGetTIBAddr
].support
!= PACKET_DISABLE
)
8737 struct remote_state
*rs
= get_remote_state ();
8739 char *endp
= rs
->buf
+ get_remote_packet_size ();
8740 enum packet_result result
;
8742 strcpy (p
, "qGetTIBAddr:");
8744 p
= write_ptid (p
, endp
, ptid
);
8748 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8749 result
= packet_ok (rs
->buf
,
8750 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
8751 if (result
== PACKET_OK
)
8755 unpack_varlen_hex (rs
->buf
, &result
);
8757 *addr
= (CORE_ADDR
) result
;
8760 else if (result
== PACKET_UNKNOWN
)
8761 error (_("Remote target doesn't support qGetTIBAddr packet"));
8763 error (_("Remote target failed to process qGetTIBAddr request"));
8766 error (_("qGetTIBAddr not supported or disabled on this target"));
8771 /* Support for inferring a target description based on the current
8772 architecture and the size of a 'g' packet. While the 'g' packet
8773 can have any size (since optional registers can be left off the
8774 end), some sizes are easily recognizable given knowledge of the
8775 approximate architecture. */
8777 struct remote_g_packet_guess
8780 const struct target_desc
*tdesc
;
8782 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
8783 DEF_VEC_O(remote_g_packet_guess_s
);
8785 struct remote_g_packet_data
8787 VEC(remote_g_packet_guess_s
) *guesses
;
8790 static struct gdbarch_data
*remote_g_packet_data_handle
;
8793 remote_g_packet_data_init (struct obstack
*obstack
)
8795 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
8799 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
8800 const struct target_desc
*tdesc
)
8802 struct remote_g_packet_data
*data
8803 = gdbarch_data (gdbarch
, remote_g_packet_data_handle
);
8804 struct remote_g_packet_guess new_guess
, *guess
;
8807 gdb_assert (tdesc
!= NULL
);
8810 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
8812 if (guess
->bytes
== bytes
)
8813 internal_error (__FILE__
, __LINE__
,
8814 _("Duplicate g packet description added for size %d"),
8817 new_guess
.bytes
= bytes
;
8818 new_guess
.tdesc
= tdesc
;
8819 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
8822 /* Return 1 if remote_read_description would do anything on this target
8823 and architecture, 0 otherwise. */
8826 remote_read_description_p (struct target_ops
*target
)
8828 struct remote_g_packet_data
*data
8829 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
8831 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
8837 static const struct target_desc
*
8838 remote_read_description (struct target_ops
*target
)
8840 struct remote_g_packet_data
*data
8841 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
8843 /* Do not try this during initial connection, when we do not know
8844 whether there is a running but stopped thread. */
8845 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
8848 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
8850 struct remote_g_packet_guess
*guess
;
8852 int bytes
= send_g_packet ();
8855 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
8857 if (guess
->bytes
== bytes
)
8858 return guess
->tdesc
;
8860 /* We discard the g packet. A minor optimization would be to
8861 hold on to it, and fill the register cache once we have selected
8862 an architecture, but it's too tricky to do safely. */
8868 /* Remote file transfer support. This is host-initiated I/O, not
8869 target-initiated; for target-initiated, see remote-fileio.c. */
8871 /* If *LEFT is at least the length of STRING, copy STRING to
8872 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8873 decrease *LEFT. Otherwise raise an error. */
8876 remote_buffer_add_string (char **buffer
, int *left
, char *string
)
8878 int len
= strlen (string
);
8881 error (_("Packet too long for target."));
8883 memcpy (*buffer
, string
, len
);
8887 /* NUL-terminate the buffer as a convenience, if there is
8893 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
8894 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8895 decrease *LEFT. Otherwise raise an error. */
8898 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
8901 if (2 * len
> *left
)
8902 error (_("Packet too long for target."));
8904 bin2hex (bytes
, *buffer
, len
);
8908 /* NUL-terminate the buffer as a convenience, if there is
8914 /* If *LEFT is large enough, convert VALUE to hex and add it to
8915 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8916 decrease *LEFT. Otherwise raise an error. */
8919 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
8921 int len
= hexnumlen (value
);
8924 error (_("Packet too long for target."));
8926 hexnumstr (*buffer
, value
);
8930 /* NUL-terminate the buffer as a convenience, if there is
8936 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
8937 value, *REMOTE_ERRNO to the remote error number or zero if none
8938 was included, and *ATTACHMENT to point to the start of the annex
8939 if any. The length of the packet isn't needed here; there may
8940 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
8942 Return 0 if the packet could be parsed, -1 if it could not. If
8943 -1 is returned, the other variables may not be initialized. */
8946 remote_hostio_parse_result (char *buffer
, int *retcode
,
8947 int *remote_errno
, char **attachment
)
8954 if (buffer
[0] != 'F')
8958 *retcode
= strtol (&buffer
[1], &p
, 16);
8959 if (errno
!= 0 || p
== &buffer
[1])
8962 /* Check for ",errno". */
8966 *remote_errno
= strtol (p
+ 1, &p2
, 16);
8967 if (errno
!= 0 || p
+ 1 == p2
)
8972 /* Check for ";attachment". If there is no attachment, the
8973 packet should end here. */
8976 *attachment
= p
+ 1;
8979 else if (*p
== '\0')
8985 /* Send a prepared I/O packet to the target and read its response.
8986 The prepared packet is in the global RS->BUF before this function
8987 is called, and the answer is there when we return.
8989 COMMAND_BYTES is the length of the request to send, which may include
8990 binary data. WHICH_PACKET is the packet configuration to check
8991 before attempting a packet. If an error occurs, *REMOTE_ERRNO
8992 is set to the error number and -1 is returned. Otherwise the value
8993 returned by the function is returned.
8995 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
8996 attachment is expected; an error will be reported if there's a
8997 mismatch. If one is found, *ATTACHMENT will be set to point into
8998 the packet buffer and *ATTACHMENT_LEN will be set to the
8999 attachment's length. */
9002 remote_hostio_send_command (int command_bytes
, int which_packet
,
9003 int *remote_errno
, char **attachment
,
9004 int *attachment_len
)
9006 struct remote_state
*rs
= get_remote_state ();
9007 int ret
, bytes_read
;
9008 char *attachment_tmp
;
9011 || remote_protocol_packets
[which_packet
].support
== PACKET_DISABLE
)
9013 *remote_errno
= FILEIO_ENOSYS
;
9017 putpkt_binary (rs
->buf
, command_bytes
);
9018 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
9020 /* If it timed out, something is wrong. Don't try to parse the
9024 *remote_errno
= FILEIO_EINVAL
;
9028 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
9031 *remote_errno
= FILEIO_EINVAL
;
9033 case PACKET_UNKNOWN
:
9034 *remote_errno
= FILEIO_ENOSYS
;
9040 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
9043 *remote_errno
= FILEIO_EINVAL
;
9047 /* Make sure we saw an attachment if and only if we expected one. */
9048 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
9049 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
9051 *remote_errno
= FILEIO_EINVAL
;
9055 /* If an attachment was found, it must point into the packet buffer;
9056 work out how many bytes there were. */
9057 if (attachment_tmp
!= NULL
)
9059 *attachment
= attachment_tmp
;
9060 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
9066 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
9067 remote file descriptor, or -1 if an error occurs (and set
9071 remote_hostio_open (const char *filename
, int flags
, int mode
,
9074 struct remote_state
*rs
= get_remote_state ();
9076 int left
= get_remote_packet_size () - 1;
9078 remote_buffer_add_string (&p
, &left
, "vFile:open:");
9080 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
9082 remote_buffer_add_string (&p
, &left
, ",");
9084 remote_buffer_add_int (&p
, &left
, flags
);
9085 remote_buffer_add_string (&p
, &left
, ",");
9087 remote_buffer_add_int (&p
, &left
, mode
);
9089 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
9090 remote_errno
, NULL
, NULL
);
9093 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
9094 Return the number of bytes written, or -1 if an error occurs (and
9095 set *REMOTE_ERRNO). */
9098 remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
9099 ULONGEST offset
, int *remote_errno
)
9101 struct remote_state
*rs
= get_remote_state ();
9103 int left
= get_remote_packet_size ();
9106 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
9108 remote_buffer_add_int (&p
, &left
, fd
);
9109 remote_buffer_add_string (&p
, &left
, ",");
9111 remote_buffer_add_int (&p
, &left
, offset
);
9112 remote_buffer_add_string (&p
, &left
, ",");
9114 p
+= remote_escape_output (write_buf
, len
, p
, &out_len
,
9115 get_remote_packet_size () - (p
- rs
->buf
));
9117 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
9118 remote_errno
, NULL
, NULL
);
9121 /* Read up to LEN bytes FD on the remote target into READ_BUF
9122 Return the number of bytes read, or -1 if an error occurs (and
9123 set *REMOTE_ERRNO). */
9126 remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
9127 ULONGEST offset
, int *remote_errno
)
9129 struct remote_state
*rs
= get_remote_state ();
9132 int left
= get_remote_packet_size ();
9133 int ret
, attachment_len
;
9136 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
9138 remote_buffer_add_int (&p
, &left
, fd
);
9139 remote_buffer_add_string (&p
, &left
, ",");
9141 remote_buffer_add_int (&p
, &left
, len
);
9142 remote_buffer_add_string (&p
, &left
, ",");
9144 remote_buffer_add_int (&p
, &left
, offset
);
9146 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
9147 remote_errno
, &attachment
,
9153 read_len
= remote_unescape_input (attachment
, attachment_len
,
9155 if (read_len
!= ret
)
9156 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
9161 /* Close FD on the remote target. Return 0, or -1 if an error occurs
9162 (and set *REMOTE_ERRNO). */
9165 remote_hostio_close (int fd
, int *remote_errno
)
9167 struct remote_state
*rs
= get_remote_state ();
9169 int left
= get_remote_packet_size () - 1;
9171 remote_buffer_add_string (&p
, &left
, "vFile:close:");
9173 remote_buffer_add_int (&p
, &left
, fd
);
9175 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
9176 remote_errno
, NULL
, NULL
);
9179 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
9180 occurs (and set *REMOTE_ERRNO). */
9183 remote_hostio_unlink (const char *filename
, int *remote_errno
)
9185 struct remote_state
*rs
= get_remote_state ();
9187 int left
= get_remote_packet_size () - 1;
9189 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
9191 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
9194 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
9195 remote_errno
, NULL
, NULL
);
9199 remote_fileio_errno_to_host (int errnum
)
9223 case FILEIO_ENOTDIR
:
9243 case FILEIO_ENAMETOOLONG
:
9244 return ENAMETOOLONG
;
9250 remote_hostio_error (int errnum
)
9252 int host_error
= remote_fileio_errno_to_host (errnum
);
9254 if (host_error
== -1)
9255 error (_("Unknown remote I/O error %d"), errnum
);
9257 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
9261 remote_hostio_close_cleanup (void *opaque
)
9263 int fd
= *(int *) opaque
;
9266 remote_hostio_close (fd
, &remote_errno
);
9271 remote_bfd_iovec_open (struct bfd
*abfd
, void *open_closure
)
9273 const char *filename
= bfd_get_filename (abfd
);
9274 int fd
, remote_errno
;
9277 gdb_assert (remote_filename_p (filename
));
9279 fd
= remote_hostio_open (filename
+ 7, FILEIO_O_RDONLY
, 0, &remote_errno
);
9282 errno
= remote_fileio_errno_to_host (remote_errno
);
9283 bfd_set_error (bfd_error_system_call
);
9287 stream
= xmalloc (sizeof (int));
9293 remote_bfd_iovec_close (struct bfd
*abfd
, void *stream
)
9295 int fd
= *(int *)stream
;
9300 /* Ignore errors on close; these may happen if the remote
9301 connection was already torn down. */
9302 remote_hostio_close (fd
, &remote_errno
);
9308 remote_bfd_iovec_pread (struct bfd
*abfd
, void *stream
, void *buf
,
9309 file_ptr nbytes
, file_ptr offset
)
9311 int fd
= *(int *)stream
;
9313 file_ptr pos
, bytes
;
9316 while (nbytes
> pos
)
9318 bytes
= remote_hostio_pread (fd
, (char *)buf
+ pos
, nbytes
- pos
,
9319 offset
+ pos
, &remote_errno
);
9321 /* Success, but no bytes, means end-of-file. */
9325 errno
= remote_fileio_errno_to_host (remote_errno
);
9326 bfd_set_error (bfd_error_system_call
);
9337 remote_bfd_iovec_stat (struct bfd
*abfd
, void *stream
, struct stat
*sb
)
9339 /* FIXME: We should probably implement remote_hostio_stat. */
9340 sb
->st_size
= INT_MAX
;
9345 remote_filename_p (const char *filename
)
9347 return strncmp (filename
, "remote:", 7) == 0;
9351 remote_bfd_open (const char *remote_file
, const char *target
)
9353 return bfd_openr_iovec (remote_file
, target
,
9354 remote_bfd_iovec_open
, NULL
,
9355 remote_bfd_iovec_pread
,
9356 remote_bfd_iovec_close
,
9357 remote_bfd_iovec_stat
);
9361 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
9363 struct cleanup
*back_to
, *close_cleanup
;
9364 int retcode
, fd
, remote_errno
, bytes
, io_size
;
9367 int bytes_in_buffer
;
9372 error (_("command can only be used with remote target"));
9374 file
= fopen (local_file
, "rb");
9376 perror_with_name (local_file
);
9377 back_to
= make_cleanup_fclose (file
);
9379 fd
= remote_hostio_open (remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
9381 0700, &remote_errno
);
9383 remote_hostio_error (remote_errno
);
9385 /* Send up to this many bytes at once. They won't all fit in the
9386 remote packet limit, so we'll transfer slightly fewer. */
9387 io_size
= get_remote_packet_size ();
9388 buffer
= xmalloc (io_size
);
9389 make_cleanup (xfree
, buffer
);
9391 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
9393 bytes_in_buffer
= 0;
9396 while (bytes_in_buffer
|| !saw_eof
)
9400 bytes
= fread (buffer
+ bytes_in_buffer
, 1,
9401 io_size
- bytes_in_buffer
,
9406 error (_("Error reading %s."), local_file
);
9409 /* EOF. Unless there is something still in the
9410 buffer from the last iteration, we are done. */
9412 if (bytes_in_buffer
== 0)
9420 bytes
+= bytes_in_buffer
;
9421 bytes_in_buffer
= 0;
9423 retcode
= remote_hostio_pwrite (fd
, buffer
, bytes
,
9424 offset
, &remote_errno
);
9427 remote_hostio_error (remote_errno
);
9428 else if (retcode
== 0)
9429 error (_("Remote write of %d bytes returned 0!"), bytes
);
9430 else if (retcode
< bytes
)
9432 /* Short write. Save the rest of the read data for the next
9434 bytes_in_buffer
= bytes
- retcode
;
9435 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
9441 discard_cleanups (close_cleanup
);
9442 if (remote_hostio_close (fd
, &remote_errno
))
9443 remote_hostio_error (remote_errno
);
9446 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
9447 do_cleanups (back_to
);
9451 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
9453 struct cleanup
*back_to
, *close_cleanup
;
9454 int fd
, remote_errno
, bytes
, io_size
;
9460 error (_("command can only be used with remote target"));
9462 fd
= remote_hostio_open (remote_file
, FILEIO_O_RDONLY
, 0, &remote_errno
);
9464 remote_hostio_error (remote_errno
);
9466 file
= fopen (local_file
, "wb");
9468 perror_with_name (local_file
);
9469 back_to
= make_cleanup_fclose (file
);
9471 /* Send up to this many bytes at once. They won't all fit in the
9472 remote packet limit, so we'll transfer slightly fewer. */
9473 io_size
= get_remote_packet_size ();
9474 buffer
= xmalloc (io_size
);
9475 make_cleanup (xfree
, buffer
);
9477 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
9482 bytes
= remote_hostio_pread (fd
, buffer
, io_size
, offset
, &remote_errno
);
9484 /* Success, but no bytes, means end-of-file. */
9487 remote_hostio_error (remote_errno
);
9491 bytes
= fwrite (buffer
, 1, bytes
, file
);
9493 perror_with_name (local_file
);
9496 discard_cleanups (close_cleanup
);
9497 if (remote_hostio_close (fd
, &remote_errno
))
9498 remote_hostio_error (remote_errno
);
9501 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
9502 do_cleanups (back_to
);
9506 remote_file_delete (const char *remote_file
, int from_tty
)
9508 int retcode
, remote_errno
;
9511 error (_("command can only be used with remote target"));
9513 retcode
= remote_hostio_unlink (remote_file
, &remote_errno
);
9515 remote_hostio_error (remote_errno
);
9518 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
9522 remote_put_command (char *args
, int from_tty
)
9524 struct cleanup
*back_to
;
9528 error_no_arg (_("file to put"));
9530 argv
= gdb_buildargv (args
);
9531 back_to
= make_cleanup_freeargv (argv
);
9532 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
9533 error (_("Invalid parameters to remote put"));
9535 remote_file_put (argv
[0], argv
[1], from_tty
);
9537 do_cleanups (back_to
);
9541 remote_get_command (char *args
, int from_tty
)
9543 struct cleanup
*back_to
;
9547 error_no_arg (_("file to get"));
9549 argv
= gdb_buildargv (args
);
9550 back_to
= make_cleanup_freeargv (argv
);
9551 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
9552 error (_("Invalid parameters to remote get"));
9554 remote_file_get (argv
[0], argv
[1], from_tty
);
9556 do_cleanups (back_to
);
9560 remote_delete_command (char *args
, int from_tty
)
9562 struct cleanup
*back_to
;
9566 error_no_arg (_("file to delete"));
9568 argv
= gdb_buildargv (args
);
9569 back_to
= make_cleanup_freeargv (argv
);
9570 if (argv
[0] == NULL
|| argv
[1] != NULL
)
9571 error (_("Invalid parameters to remote delete"));
9573 remote_file_delete (argv
[0], from_tty
);
9575 do_cleanups (back_to
);
9579 remote_command (char *args
, int from_tty
)
9581 help_list (remote_cmdlist
, "remote ", -1, gdb_stdout
);
9585 remote_can_execute_reverse (void)
9587 if (remote_protocol_packets
[PACKET_bs
].support
== PACKET_ENABLE
9588 || remote_protocol_packets
[PACKET_bc
].support
== PACKET_ENABLE
)
9595 remote_supports_non_stop (void)
9601 remote_supports_multi_process (void)
9603 struct remote_state
*rs
= get_remote_state ();
9605 return remote_multi_process_p (rs
);
9609 remote_supports_cond_tracepoints (void)
9611 struct remote_state
*rs
= get_remote_state ();
9613 return rs
->cond_tracepoints
;
9617 remote_supports_fast_tracepoints (void)
9619 struct remote_state
*rs
= get_remote_state ();
9621 return rs
->fast_tracepoints
;
9625 remote_supports_static_tracepoints (void)
9627 struct remote_state
*rs
= get_remote_state ();
9629 return rs
->static_tracepoints
;
9633 remote_trace_init (void)
9636 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9637 if (strcmp (target_buf
, "OK") != 0)
9638 error (_("Target does not support this command."));
9641 static void free_actions_list (char **actions_list
);
9642 static void free_actions_list_cleanup_wrapper (void *);
9644 free_actions_list_cleanup_wrapper (void *al
)
9646 free_actions_list (al
);
9650 free_actions_list (char **actions_list
)
9654 if (actions_list
== 0)
9657 for (ndx
= 0; actions_list
[ndx
]; ndx
++)
9658 xfree (actions_list
[ndx
]);
9660 xfree (actions_list
);
9663 /* Recursive routine to walk through command list including loops, and
9664 download packets for each command. */
9667 remote_download_command_source (int num
, ULONGEST addr
,
9668 struct command_line
*cmds
)
9670 struct remote_state
*rs
= get_remote_state ();
9671 struct command_line
*cmd
;
9673 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
9675 QUIT
; /* Allow user to bail out with ^C. */
9676 strcpy (rs
->buf
, "QTDPsrc:");
9677 encode_source_string (num
, addr
, "cmd", cmd
->line
,
9678 rs
->buf
+ strlen (rs
->buf
),
9679 rs
->buf_size
- strlen (rs
->buf
));
9681 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9682 if (strcmp (target_buf
, "OK"))
9683 warning (_("Target does not support source download."));
9685 if (cmd
->control_type
== while_control
9686 || cmd
->control_type
== while_stepping_control
)
9688 remote_download_command_source (num
, addr
, *cmd
->body_list
);
9690 QUIT
; /* Allow user to bail out with ^C. */
9691 strcpy (rs
->buf
, "QTDPsrc:");
9692 encode_source_string (num
, addr
, "cmd", "end",
9693 rs
->buf
+ strlen (rs
->buf
),
9694 rs
->buf_size
- strlen (rs
->buf
));
9696 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9697 if (strcmp (target_buf
, "OK"))
9698 warning (_("Target does not support source download."));
9704 remote_download_tracepoint (struct breakpoint
*t
)
9706 struct bp_location
*loc
;
9711 char **stepping_actions
;
9713 struct cleanup
*old_chain
= NULL
;
9714 struct agent_expr
*aexpr
;
9715 struct cleanup
*aexpr_chain
= NULL
;
9718 /* Iterate over all the tracepoint locations. It's up to the target to
9719 notice multiple tracepoint packets with the same number but different
9720 addresses, and treat them as multiple locations. */
9721 for (loc
= t
->loc
; loc
; loc
= loc
->next
)
9723 encode_actions (t
, loc
, &tdp_actions
, &stepping_actions
);
9724 old_chain
= make_cleanup (free_actions_list_cleanup_wrapper
,
9726 (void) make_cleanup (free_actions_list_cleanup_wrapper
,
9729 tpaddr
= loc
->address
;
9730 sprintf_vma (addrbuf
, tpaddr
);
9731 sprintf (buf
, "QTDP:%x:%s:%c:%lx:%x", t
->number
,
9732 addrbuf
, /* address */
9733 (t
->enable_state
== bp_enabled
? 'E' : 'D'),
9734 t
->step_count
, t
->pass_count
);
9735 /* Fast tracepoints are mostly handled by the target, but we can
9736 tell the target how big of an instruction block should be moved
9738 if (t
->type
== bp_fast_tracepoint
)
9740 /* Only test for support at download time; we may not know
9741 target capabilities at definition time. */
9742 if (remote_supports_fast_tracepoints ())
9746 if (gdbarch_fast_tracepoint_valid_at (target_gdbarch
,
9747 tpaddr
, &isize
, NULL
))
9748 sprintf (buf
+ strlen (buf
), ":F%x", isize
);
9750 /* If it passed validation at definition but fails now,
9751 something is very wrong. */
9752 internal_error (__FILE__
, __LINE__
,
9753 _("Fast tracepoint not "
9754 "valid during download"));
9757 /* Fast tracepoints are functionally identical to regular
9758 tracepoints, so don't take lack of support as a reason to
9759 give up on the trace run. */
9760 warning (_("Target does not support fast tracepoints, "
9761 "downloading %d as regular tracepoint"), t
->number
);
9763 else if (t
->type
== bp_static_tracepoint
)
9765 /* Only test for support at download time; we may not know
9766 target capabilities at definition time. */
9767 if (remote_supports_static_tracepoints ())
9769 struct static_tracepoint_marker marker
;
9771 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
9774 error (_("Static tracepoint not valid during download"));
9777 /* Fast tracepoints are functionally identical to regular
9778 tracepoints, so don't take lack of support as a reason
9779 to give up on the trace run. */
9780 error (_("Target does not support static tracepoints"));
9782 /* If the tracepoint has a conditional, make it into an agent
9783 expression and append to the definition. */
9786 /* Only test support at download time, we may not know target
9787 capabilities at definition time. */
9788 if (remote_supports_cond_tracepoints ())
9790 aexpr
= gen_eval_for_expr (tpaddr
, loc
->cond
);
9791 aexpr_chain
= make_cleanup_free_agent_expr (aexpr
);
9792 sprintf (buf
+ strlen (buf
), ":X%x,", aexpr
->len
);
9793 pkt
= buf
+ strlen (buf
);
9794 for (ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
9795 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
9797 do_cleanups (aexpr_chain
);
9800 warning (_("Target does not support conditional tracepoints, "
9801 "ignoring tp %d cond"), t
->number
);
9804 if (t
->commands
|| *default_collect
)
9807 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9808 if (strcmp (target_buf
, "OK"))
9809 error (_("Target does not support tracepoints."));
9811 /* do_single_steps (t); */
9814 for (ndx
= 0; tdp_actions
[ndx
]; ndx
++)
9816 QUIT
; /* Allow user to bail out with ^C. */
9817 sprintf (buf
, "QTDP:-%x:%s:%s%c",
9818 t
->number
, addrbuf
, /* address */
9820 ((tdp_actions
[ndx
+ 1] || stepping_actions
)
9823 remote_get_noisy_reply (&target_buf
,
9825 if (strcmp (target_buf
, "OK"))
9826 error (_("Error on target while setting tracepoints."));
9829 if (stepping_actions
)
9831 for (ndx
= 0; stepping_actions
[ndx
]; ndx
++)
9833 QUIT
; /* Allow user to bail out with ^C. */
9834 sprintf (buf
, "QTDP:-%x:%s:%s%s%s",
9835 t
->number
, addrbuf
, /* address */
9836 ((ndx
== 0) ? "S" : ""),
9837 stepping_actions
[ndx
],
9838 (stepping_actions
[ndx
+ 1] ? "-" : ""));
9840 remote_get_noisy_reply (&target_buf
,
9842 if (strcmp (target_buf
, "OK"))
9843 error (_("Error on target while setting tracepoints."));
9847 if (remote_protocol_packets
[PACKET_TracepointSource
].support
9852 strcpy (buf
, "QTDPsrc:");
9853 encode_source_string (t
->number
, loc
->address
,
9854 "at", t
->addr_string
, buf
+ strlen (buf
),
9855 2048 - strlen (buf
));
9858 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9859 if (strcmp (target_buf
, "OK"))
9860 warning (_("Target does not support source download."));
9864 strcpy (buf
, "QTDPsrc:");
9865 encode_source_string (t
->number
, loc
->address
,
9866 "cond", t
->cond_string
, buf
+ strlen (buf
),
9867 2048 - strlen (buf
));
9869 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9870 if (strcmp (target_buf
, "OK"))
9871 warning (_("Target does not support source download."));
9873 remote_download_command_source (t
->number
, loc
->address
,
9874 breakpoint_commands (t
));
9877 do_cleanups (old_chain
);
9882 remote_download_trace_state_variable (struct trace_state_variable
*tsv
)
9884 struct remote_state
*rs
= get_remote_state ();
9887 sprintf (rs
->buf
, "QTDV:%x:%s:%x:",
9888 tsv
->number
, phex ((ULONGEST
) tsv
->initial_value
, 8), tsv
->builtin
);
9889 p
= rs
->buf
+ strlen (rs
->buf
);
9890 if ((p
- rs
->buf
) + strlen (tsv
->name
) * 2 >= get_remote_packet_size ())
9891 error (_("Trace state variable name too long for tsv definition packet"));
9892 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
->name
), p
, 0);
9895 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9896 if (*target_buf
== '\0')
9897 error (_("Target does not support this command."));
9898 if (strcmp (target_buf
, "OK") != 0)
9899 error (_("Error on target while downloading trace state variable."));
9903 remote_trace_set_readonly_regions (void)
9911 return; /* No information to give. */
9913 strcpy (target_buf
, "QTro");
9914 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
9916 char tmp1
[40], tmp2
[40];
9918 if ((s
->flags
& SEC_LOAD
) == 0 ||
9919 /* (s->flags & SEC_CODE) == 0 || */
9920 (s
->flags
& SEC_READONLY
) == 0)
9924 vma
= bfd_get_section_vma (,s
);
9925 size
= bfd_get_section_size (s
);
9926 sprintf_vma (tmp1
, vma
);
9927 sprintf_vma (tmp2
, vma
+ size
);
9928 sprintf (target_buf
+ strlen (target_buf
),
9929 ":%s,%s", tmp1
, tmp2
);
9933 putpkt (target_buf
);
9934 getpkt (&target_buf
, &target_buf_size
, 0);
9939 remote_trace_start (void)
9942 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9943 if (*target_buf
== '\0')
9944 error (_("Target does not support this command."));
9945 if (strcmp (target_buf
, "OK") != 0)
9946 error (_("Bogus reply from target: %s"), target_buf
);
9950 remote_get_trace_status (struct trace_status
*ts
)
9953 /* FIXME we need to get register block size some other way. */
9954 extern int trace_regblock_size
;
9956 trace_regblock_size
= get_remote_arch_state ()->sizeof_g_packet
;
9958 putpkt ("qTStatus");
9959 p
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9961 /* If the remote target doesn't do tracing, flag it. */
9965 /* We're working with a live target. */
9968 /* Set some defaults. */
9969 ts
->running_known
= 0;
9970 ts
->stop_reason
= trace_stop_reason_unknown
;
9971 ts
->traceframe_count
= -1;
9972 ts
->buffer_free
= 0;
9975 error (_("Bogus trace status reply from target: %s"), target_buf
);
9977 parse_trace_status (p
, ts
);
9983 remote_trace_stop (void)
9986 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9987 if (*target_buf
== '\0')
9988 error (_("Target does not support this command."));
9989 if (strcmp (target_buf
, "OK") != 0)
9990 error (_("Bogus reply from target: %s"), target_buf
);
9994 remote_trace_find (enum trace_find_type type
, int num
,
9995 ULONGEST addr1
, ULONGEST addr2
,
9998 struct remote_state
*rs
= get_remote_state ();
10000 int target_frameno
= -1, target_tracept
= -1;
10002 /* Lookups other than by absolute frame number depend on the current
10003 trace selected, so make sure it is correct on the remote end
10005 if (type
!= tfind_number
)
10006 set_remote_traceframe ();
10009 strcpy (p
, "QTFrame:");
10010 p
= strchr (p
, '\0');
10014 sprintf (p
, "%x", num
);
10017 sprintf (p
, "pc:%s", phex_nz (addr1
, 0));
10020 sprintf (p
, "tdp:%x", num
);
10023 sprintf (p
, "range:%s:%s", phex_nz (addr1
, 0), phex_nz (addr2
, 0));
10025 case tfind_outside
:
10026 sprintf (p
, "outside:%s:%s", phex_nz (addr1
, 0), phex_nz (addr2
, 0));
10029 error (_("Unknown trace find type %d"), type
);
10033 reply
= remote_get_noisy_reply (&(rs
->buf
), &sizeof_pkt
);
10034 if (*reply
== '\0')
10035 error (_("Target does not support this command."));
10037 while (reply
&& *reply
)
10042 target_frameno
= (int) strtol (p
, &reply
, 16);
10044 error (_("Unable to parse trace frame number"));
10045 /* Don't update our remote traceframe number cache on failure
10046 to select a remote traceframe. */
10047 if (target_frameno
== -1)
10052 target_tracept
= (int) strtol (p
, &reply
, 16);
10054 error (_("Unable to parse tracepoint number"));
10056 case 'O': /* "OK"? */
10057 if (reply
[1] == 'K' && reply
[2] == '\0')
10060 error (_("Bogus reply from target: %s"), reply
);
10063 error (_("Bogus reply from target: %s"), reply
);
10066 *tpp
= target_tracept
;
10068 remote_traceframe_number
= target_frameno
;
10069 return target_frameno
;
10073 remote_get_trace_state_variable_value (int tsvnum
, LONGEST
*val
)
10075 struct remote_state
*rs
= get_remote_state ();
10079 set_remote_traceframe ();
10081 sprintf (rs
->buf
, "qTV:%x", tsvnum
);
10083 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
10084 if (reply
&& *reply
)
10088 unpack_varlen_hex (reply
+ 1, &uval
);
10089 *val
= (LONGEST
) uval
;
10097 remote_save_trace_data (const char *filename
)
10099 struct remote_state
*rs
= get_remote_state ();
10103 strcpy (p
, "QTSave:");
10105 if ((p
- rs
->buf
) + strlen (filename
) * 2 >= get_remote_packet_size ())
10106 error (_("Remote file name too long for trace save packet"));
10107 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, 0);
10110 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
10111 if (*reply
!= '\0')
10112 error (_("Target does not support this command."));
10113 if (strcmp (reply
, "OK") != 0)
10114 error (_("Bogus reply from target: %s"), reply
);
10118 /* This is basically a memory transfer, but needs to be its own packet
10119 because we don't know how the target actually organizes its trace
10120 memory, plus we want to be able to ask for as much as possible, but
10121 not be unhappy if we don't get as much as we ask for. */
10124 remote_get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
10126 struct remote_state
*rs
= get_remote_state ();
10132 strcpy (p
, "qTBuffer:");
10134 p
+= hexnumstr (p
, offset
);
10136 p
+= hexnumstr (p
, len
);
10140 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
10141 if (reply
&& *reply
)
10143 /* 'l' by itself means we're at the end of the buffer and
10144 there is nothing more to get. */
10148 /* Convert the reply into binary. Limit the number of bytes to
10149 convert according to our passed-in buffer size, rather than
10150 what was returned in the packet; if the target is
10151 unexpectedly generous and gives us a bigger reply than we
10152 asked for, we don't want to crash. */
10153 rslt
= hex2bin (target_buf
, buf
, len
);
10157 /* Something went wrong, flag as an error. */
10162 remote_set_disconnected_tracing (int val
)
10164 struct remote_state
*rs
= get_remote_state ();
10166 if (rs
->disconnected_tracing
)
10170 sprintf (rs
->buf
, "QTDisconnected:%x", val
);
10172 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
10173 if (*reply
== '\0')
10174 error (_("Target does not support this command."));
10175 if (strcmp (reply
, "OK") != 0)
10176 error (_("Bogus reply from target: %s"), reply
);
10179 warning (_("Target does not support disconnected tracing."));
10183 remote_core_of_thread (struct target_ops
*ops
, ptid_t ptid
)
10185 struct thread_info
*info
= find_thread_ptid (ptid
);
10187 if (info
&& info
->private)
10188 return info
->private->core
;
10193 remote_set_circular_trace_buffer (int val
)
10195 struct remote_state
*rs
= get_remote_state ();
10198 sprintf (rs
->buf
, "QTBuffer:circular:%x", val
);
10200 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
10201 if (*reply
== '\0')
10202 error (_("Target does not support this command."));
10203 if (strcmp (reply
, "OK") != 0)
10204 error (_("Bogus reply from target: %s"), reply
);
10207 static struct traceframe_info
*
10208 remote_traceframe_info (void)
10212 text
= target_read_stralloc (¤t_target
,
10213 TARGET_OBJECT_TRACEFRAME_INFO
, NULL
);
10216 struct traceframe_info
*info
;
10217 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
10219 info
= parse_traceframe_info (text
);
10220 do_cleanups (back_to
);
10228 init_remote_ops (void)
10230 remote_ops
.to_shortname
= "remote";
10231 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
10232 remote_ops
.to_doc
=
10233 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
10234 Specify the serial device it is connected to\n\
10235 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
10236 remote_ops
.to_open
= remote_open
;
10237 remote_ops
.to_close
= remote_close
;
10238 remote_ops
.to_detach
= remote_detach
;
10239 remote_ops
.to_disconnect
= remote_disconnect
;
10240 remote_ops
.to_resume
= remote_resume
;
10241 remote_ops
.to_wait
= remote_wait
;
10242 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
10243 remote_ops
.to_store_registers
= remote_store_registers
;
10244 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
10245 remote_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
10246 remote_ops
.to_files_info
= remote_files_info
;
10247 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
10248 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
10249 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
10250 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
10251 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
10252 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
10253 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
10254 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
10255 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
10256 remote_ops
.to_kill
= remote_kill
;
10257 remote_ops
.to_load
= generic_load
;
10258 remote_ops
.to_mourn_inferior
= remote_mourn
;
10259 remote_ops
.to_notice_signals
= remote_notice_signals
;
10260 remote_ops
.to_thread_alive
= remote_thread_alive
;
10261 remote_ops
.to_find_new_threads
= remote_threads_info
;
10262 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
10263 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
10264 remote_ops
.to_get_ada_task_ptid
= remote_get_ada_task_ptid
;
10265 remote_ops
.to_stop
= remote_stop
;
10266 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
10267 remote_ops
.to_rcmd
= remote_rcmd
;
10268 remote_ops
.to_log_command
= serial_log_command
;
10269 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
10270 remote_ops
.to_stratum
= process_stratum
;
10271 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
10272 remote_ops
.to_has_memory
= default_child_has_memory
;
10273 remote_ops
.to_has_stack
= default_child_has_stack
;
10274 remote_ops
.to_has_registers
= default_child_has_registers
;
10275 remote_ops
.to_has_execution
= default_child_has_execution
;
10276 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
10277 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
10278 remote_ops
.to_magic
= OPS_MAGIC
;
10279 remote_ops
.to_memory_map
= remote_memory_map
;
10280 remote_ops
.to_flash_erase
= remote_flash_erase
;
10281 remote_ops
.to_flash_done
= remote_flash_done
;
10282 remote_ops
.to_read_description
= remote_read_description
;
10283 remote_ops
.to_search_memory
= remote_search_memory
;
10284 remote_ops
.to_can_async_p
= remote_can_async_p
;
10285 remote_ops
.to_is_async_p
= remote_is_async_p
;
10286 remote_ops
.to_async
= remote_async
;
10287 remote_ops
.to_async_mask
= remote_async_mask
;
10288 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
10289 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
10290 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
10291 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
10292 remote_ops
.to_trace_init
= remote_trace_init
;
10293 remote_ops
.to_download_tracepoint
= remote_download_tracepoint
;
10294 remote_ops
.to_download_trace_state_variable
10295 = remote_download_trace_state_variable
;
10296 remote_ops
.to_trace_set_readonly_regions
= remote_trace_set_readonly_regions
;
10297 remote_ops
.to_trace_start
= remote_trace_start
;
10298 remote_ops
.to_get_trace_status
= remote_get_trace_status
;
10299 remote_ops
.to_trace_stop
= remote_trace_stop
;
10300 remote_ops
.to_trace_find
= remote_trace_find
;
10301 remote_ops
.to_get_trace_state_variable_value
10302 = remote_get_trace_state_variable_value
;
10303 remote_ops
.to_save_trace_data
= remote_save_trace_data
;
10304 remote_ops
.to_upload_tracepoints
= remote_upload_tracepoints
;
10305 remote_ops
.to_upload_trace_state_variables
10306 = remote_upload_trace_state_variables
;
10307 remote_ops
.to_get_raw_trace_data
= remote_get_raw_trace_data
;
10308 remote_ops
.to_set_disconnected_tracing
= remote_set_disconnected_tracing
;
10309 remote_ops
.to_set_circular_trace_buffer
= remote_set_circular_trace_buffer
;
10310 remote_ops
.to_core_of_thread
= remote_core_of_thread
;
10311 remote_ops
.to_verify_memory
= remote_verify_memory
;
10312 remote_ops
.to_get_tib_address
= remote_get_tib_address
;
10313 remote_ops
.to_set_permissions
= remote_set_permissions
;
10314 remote_ops
.to_static_tracepoint_marker_at
10315 = remote_static_tracepoint_marker_at
;
10316 remote_ops
.to_static_tracepoint_markers_by_strid
10317 = remote_static_tracepoint_markers_by_strid
;
10318 remote_ops
.to_traceframe_info
= remote_traceframe_info
;
10321 /* Set up the extended remote vector by making a copy of the standard
10322 remote vector and adding to it. */
10325 init_extended_remote_ops (void)
10327 extended_remote_ops
= remote_ops
;
10329 extended_remote_ops
.to_shortname
= "extended-remote";
10330 extended_remote_ops
.to_longname
=
10331 "Extended remote serial target in gdb-specific protocol";
10332 extended_remote_ops
.to_doc
=
10333 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
10334 Specify the serial device it is connected to (e.g. /dev/ttya).";
10335 extended_remote_ops
.to_open
= extended_remote_open
;
10336 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
10337 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
10338 extended_remote_ops
.to_detach
= extended_remote_detach
;
10339 extended_remote_ops
.to_attach
= extended_remote_attach
;
10340 extended_remote_ops
.to_kill
= extended_remote_kill
;
10344 remote_can_async_p (void)
10346 if (!target_async_permitted
)
10347 /* We only enable async when the user specifically asks for it. */
10350 /* We're async whenever the serial device is. */
10351 return remote_async_mask_value
&& serial_can_async_p (remote_desc
);
10355 remote_is_async_p (void)
10357 if (!target_async_permitted
)
10358 /* We only enable async when the user specifically asks for it. */
10361 /* We're async whenever the serial device is. */
10362 return remote_async_mask_value
&& serial_is_async_p (remote_desc
);
10365 /* Pass the SERIAL event on and up to the client. One day this code
10366 will be able to delay notifying the client of an event until the
10367 point where an entire packet has been received. */
10369 static void (*async_client_callback
) (enum inferior_event_type event_type
,
10371 static void *async_client_context
;
10372 static serial_event_ftype remote_async_serial_handler
;
10375 remote_async_serial_handler (struct serial
*scb
, void *context
)
10377 /* Don't propogate error information up to the client. Instead let
10378 the client find out about the error by querying the target. */
10379 async_client_callback (INF_REG_EVENT
, async_client_context
);
10383 remote_async_inferior_event_handler (gdb_client_data data
)
10385 inferior_event_handler (INF_REG_EVENT
, NULL
);
10389 remote_async_get_pending_events_handler (gdb_client_data data
)
10391 remote_get_pending_stop_replies ();
10395 remote_async (void (*callback
) (enum inferior_event_type event_type
,
10396 void *context
), void *context
)
10398 if (remote_async_mask_value
== 0)
10399 internal_error (__FILE__
, __LINE__
,
10400 _("Calling remote_async when async is masked"));
10402 if (callback
!= NULL
)
10404 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
10405 async_client_callback
= callback
;
10406 async_client_context
= context
;
10409 serial_async (remote_desc
, NULL
, NULL
);
10413 remote_async_mask (int new_mask
)
10415 int curr_mask
= remote_async_mask_value
;
10417 remote_async_mask_value
= new_mask
;
10422 set_remote_cmd (char *args
, int from_tty
)
10424 help_list (remote_set_cmdlist
, "set remote ", -1, gdb_stdout
);
10428 show_remote_cmd (char *args
, int from_tty
)
10430 /* We can't just use cmd_show_list here, because we want to skip
10431 the redundant "show remote Z-packet" and the legacy aliases. */
10432 struct cleanup
*showlist_chain
;
10433 struct cmd_list_element
*list
= remote_show_cmdlist
;
10435 showlist_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "showlist");
10436 for (; list
!= NULL
; list
= list
->next
)
10437 if (strcmp (list
->name
, "Z-packet") == 0)
10439 else if (list
->type
== not_set_cmd
)
10440 /* Alias commands are exactly like the original, except they
10441 don't have the normal type. */
10445 struct cleanup
*option_chain
10446 = make_cleanup_ui_out_tuple_begin_end (uiout
, "option");
10448 ui_out_field_string (uiout
, "name", list
->name
);
10449 ui_out_text (uiout
, ": ");
10450 if (list
->type
== show_cmd
)
10451 do_setshow_command ((char *) NULL
, from_tty
, list
);
10453 cmd_func (list
, NULL
, from_tty
);
10454 /* Close the tuple. */
10455 do_cleanups (option_chain
);
10458 /* Close the tuple. */
10459 do_cleanups (showlist_chain
);
10463 /* Function to be called whenever a new objfile (shlib) is detected. */
10465 remote_new_objfile (struct objfile
*objfile
)
10467 if (remote_desc
!= 0) /* Have a remote connection. */
10468 remote_check_symbols (objfile
);
10471 /* Pull all the tracepoints defined on the target and create local
10472 data structures representing them. We don't want to create real
10473 tracepoints yet, we don't want to mess up the user's existing
10477 remote_upload_tracepoints (struct uploaded_tp
**utpp
)
10479 struct remote_state
*rs
= get_remote_state ();
10482 /* Ask for a first packet of tracepoint definition. */
10484 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10486 while (*p
&& *p
!= 'l')
10488 parse_tracepoint_definition (p
, utpp
);
10489 /* Ask for another packet of tracepoint definition. */
10491 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10498 remote_upload_trace_state_variables (struct uploaded_tsv
**utsvp
)
10500 struct remote_state
*rs
= get_remote_state ();
10503 /* Ask for a first packet of variable definition. */
10505 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10507 while (*p
&& *p
!= 'l')
10509 parse_tsv_definition (p
, utsvp
);
10510 /* Ask for another packet of variable definition. */
10512 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10519 _initialize_remote (void)
10521 struct remote_state
*rs
;
10522 struct cmd_list_element
*cmd
;
10525 /* architecture specific data */
10526 remote_gdbarch_data_handle
=
10527 gdbarch_data_register_post_init (init_remote_state
);
10528 remote_g_packet_data_handle
=
10529 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
10531 /* Initialize the per-target state. At the moment there is only one
10532 of these, not one per target. Only one target is active at a
10533 time. The default buffer size is unimportant; it will be expanded
10534 whenever a larger buffer is needed. */
10535 rs
= get_remote_state_raw ();
10536 rs
->buf_size
= 400;
10537 rs
->buf
= xmalloc (rs
->buf_size
);
10539 init_remote_ops ();
10540 add_target (&remote_ops
);
10542 init_extended_remote_ops ();
10543 add_target (&extended_remote_ops
);
10545 /* Hook into new objfile notification. */
10546 observer_attach_new_objfile (remote_new_objfile
);
10548 /* Set up signal handlers. */
10549 sigint_remote_token
=
10550 create_async_signal_handler (async_remote_interrupt
, NULL
);
10551 sigint_remote_twice_token
=
10552 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
10555 init_remote_threadtests ();
10558 /* set/show remote ... */
10560 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
10561 Remote protocol specific variables\n\
10562 Configure various remote-protocol specific variables such as\n\
10563 the packets being used"),
10564 &remote_set_cmdlist
, "set remote ",
10565 0 /* allow-unknown */, &setlist
);
10566 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
10567 Remote protocol specific variables\n\
10568 Configure various remote-protocol specific variables such as\n\
10569 the packets being used"),
10570 &remote_show_cmdlist
, "show remote ",
10571 0 /* allow-unknown */, &showlist
);
10573 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
10574 Compare section data on target to the exec file.\n\
10575 Argument is a single section name (default: all loaded sections)."),
10578 add_cmd ("packet", class_maintenance
, packet_command
, _("\
10579 Send an arbitrary packet to a remote target.\n\
10580 maintenance packet TEXT\n\
10581 If GDB is talking to an inferior via the GDB serial protocol, then\n\
10582 this command sends the string TEXT to the inferior, and displays the\n\
10583 response packet. GDB supplies the initial `$' character, and the\n\
10584 terminating `#' character and checksum."),
10587 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
10588 Set whether to send break if interrupted."), _("\
10589 Show whether to send break if interrupted."), _("\
10590 If set, a break, instead of a cntrl-c, is sent to the remote target."),
10591 set_remotebreak
, show_remotebreak
,
10592 &setlist
, &showlist
);
10593 cmd_name
= "remotebreak";
10594 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
10595 deprecate_cmd (cmd
, "set remote interrupt-sequence");
10596 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
10597 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
10598 deprecate_cmd (cmd
, "show remote interrupt-sequence");
10600 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
10601 interrupt_sequence_modes
, &interrupt_sequence_mode
,
10603 Set interrupt sequence to remote target."), _("\
10604 Show interrupt sequence to remote target."), _("\
10605 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
10606 NULL
, show_interrupt_sequence
,
10607 &remote_set_cmdlist
,
10608 &remote_show_cmdlist
);
10610 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
10611 &interrupt_on_connect
, _("\
10612 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
10613 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
10614 If set, interrupt sequence is sent to remote target."),
10616 &remote_set_cmdlist
, &remote_show_cmdlist
);
10618 /* Install commands for configuring memory read/write packets. */
10620 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
10621 Set the maximum number of bytes per memory write packet (deprecated)."),
10623 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
10624 Show the maximum number of bytes per memory write packet (deprecated)."),
10626 add_cmd ("memory-write-packet-size", no_class
,
10627 set_memory_write_packet_size
, _("\
10628 Set the maximum number of bytes per memory-write packet.\n\
10629 Specify the number of bytes in a packet or 0 (zero) for the\n\
10630 default packet size. The actual limit is further reduced\n\
10631 dependent on the target. Specify ``fixed'' to disable the\n\
10632 further restriction and ``limit'' to enable that restriction."),
10633 &remote_set_cmdlist
);
10634 add_cmd ("memory-read-packet-size", no_class
,
10635 set_memory_read_packet_size
, _("\
10636 Set the maximum number of bytes per memory-read packet.\n\
10637 Specify the number of bytes in a packet or 0 (zero) for the\n\
10638 default packet size. The actual limit is further reduced\n\
10639 dependent on the target. Specify ``fixed'' to disable the\n\
10640 further restriction and ``limit'' to enable that restriction."),
10641 &remote_set_cmdlist
);
10642 add_cmd ("memory-write-packet-size", no_class
,
10643 show_memory_write_packet_size
,
10644 _("Show the maximum number of bytes per memory-write packet."),
10645 &remote_show_cmdlist
);
10646 add_cmd ("memory-read-packet-size", no_class
,
10647 show_memory_read_packet_size
,
10648 _("Show the maximum number of bytes per memory-read packet."),
10649 &remote_show_cmdlist
);
10651 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
10652 &remote_hw_watchpoint_limit
, _("\
10653 Set the maximum number of target hardware watchpoints."), _("\
10654 Show the maximum number of target hardware watchpoints."), _("\
10655 Specify a negative limit for unlimited."),
10656 NULL
, NULL
, /* FIXME: i18n: The maximum
10657 number of target hardware
10658 watchpoints is %s. */
10659 &remote_set_cmdlist
, &remote_show_cmdlist
);
10660 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
10661 &remote_hw_breakpoint_limit
, _("\
10662 Set the maximum number of target hardware breakpoints."), _("\
10663 Show the maximum number of target hardware breakpoints."), _("\
10664 Specify a negative limit for unlimited."),
10665 NULL
, NULL
, /* FIXME: i18n: The maximum
10666 number of target hardware
10667 breakpoints is %s. */
10668 &remote_set_cmdlist
, &remote_show_cmdlist
);
10670 add_setshow_integer_cmd ("remoteaddresssize", class_obscure
,
10671 &remote_address_size
, _("\
10672 Set the maximum size of the address (in bits) in a memory packet."), _("\
10673 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
10675 NULL
, /* FIXME: i18n: */
10676 &setlist
, &showlist
);
10678 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
10679 "X", "binary-download", 1);
10681 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
10682 "vCont", "verbose-resume", 0);
10684 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
10685 "QPassSignals", "pass-signals", 0);
10687 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
10688 "qSymbol", "symbol-lookup", 0);
10690 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
10691 "P", "set-register", 1);
10693 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
10694 "p", "fetch-register", 1);
10696 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
10697 "Z0", "software-breakpoint", 0);
10699 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
10700 "Z1", "hardware-breakpoint", 0);
10702 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
10703 "Z2", "write-watchpoint", 0);
10705 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
10706 "Z3", "read-watchpoint", 0);
10708 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
10709 "Z4", "access-watchpoint", 0);
10711 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
10712 "qXfer:auxv:read", "read-aux-vector", 0);
10714 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
10715 "qXfer:features:read", "target-features", 0);
10717 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
10718 "qXfer:libraries:read", "library-info", 0);
10720 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
10721 "qXfer:memory-map:read", "memory-map", 0);
10723 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
10724 "qXfer:spu:read", "read-spu-object", 0);
10726 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
10727 "qXfer:spu:write", "write-spu-object", 0);
10729 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
10730 "qXfer:osdata:read", "osdata", 0);
10732 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
10733 "qXfer:threads:read", "threads", 0);
10735 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
10736 "qXfer:siginfo:read", "read-siginfo-object", 0);
10738 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
10739 "qXfer:siginfo:write", "write-siginfo-object", 0);
10741 add_packet_config_cmd
10742 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
10743 "qXfer:trace-frame-info:read", "traceframe-info", 0);
10745 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
10746 "qGetTLSAddr", "get-thread-local-storage-address",
10749 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
10750 "qGetTIBAddr", "get-thread-information-block-address",
10753 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
10754 "bc", "reverse-continue", 0);
10756 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
10757 "bs", "reverse-step", 0);
10759 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
10760 "qSupported", "supported-packets", 0);
10762 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
10763 "qSearch:memory", "search-memory", 0);
10765 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
10766 "vFile:open", "hostio-open", 0);
10768 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
10769 "vFile:pread", "hostio-pread", 0);
10771 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
10772 "vFile:pwrite", "hostio-pwrite", 0);
10774 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
10775 "vFile:close", "hostio-close", 0);
10777 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
10778 "vFile:unlink", "hostio-unlink", 0);
10780 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
10781 "vAttach", "attach", 0);
10783 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
10786 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
10787 "QStartNoAckMode", "noack", 0);
10789 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
10790 "vKill", "kill", 0);
10792 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
10793 "qAttached", "query-attached", 0);
10795 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
10796 "ConditionalTracepoints",
10797 "conditional-tracepoints", 0);
10798 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
10799 "FastTracepoints", "fast-tracepoints", 0);
10801 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
10802 "TracepointSource", "TracepointSource", 0);
10804 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
10805 "QAllow", "allow", 0);
10807 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
10808 "StaticTracepoints", "static-tracepoints", 0);
10810 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
10811 "qXfer:statictrace:read", "read-sdata-object", 0);
10813 /* Keep the old ``set remote Z-packet ...'' working. Each individual
10814 Z sub-packet has its own set and show commands, but users may
10815 have sets to this variable in their .gdbinit files (or in their
10817 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
10818 &remote_Z_packet_detect
, _("\
10819 Set use of remote protocol `Z' packets"), _("\
10820 Show use of remote protocol `Z' packets "), _("\
10821 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
10823 set_remote_protocol_Z_packet_cmd
,
10824 show_remote_protocol_Z_packet_cmd
,
10825 /* FIXME: i18n: Use of remote protocol
10826 `Z' packets is %s. */
10827 &remote_set_cmdlist
, &remote_show_cmdlist
);
10829 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
10830 Manipulate files on the remote system\n\
10831 Transfer files to and from the remote target system."),
10832 &remote_cmdlist
, "remote ",
10833 0 /* allow-unknown */, &cmdlist
);
10835 add_cmd ("put", class_files
, remote_put_command
,
10836 _("Copy a local file to the remote system."),
10839 add_cmd ("get", class_files
, remote_get_command
,
10840 _("Copy a remote file to the local system."),
10843 add_cmd ("delete", class_files
, remote_delete_command
,
10844 _("Delete a remote file."),
10847 remote_exec_file
= xstrdup ("");
10848 add_setshow_string_noescape_cmd ("exec-file", class_files
,
10849 &remote_exec_file
, _("\
10850 Set the remote pathname for \"run\""), _("\
10851 Show the remote pathname for \"run\""), NULL
, NULL
, NULL
,
10852 &remote_set_cmdlist
, &remote_show_cmdlist
);
10854 /* Eventually initialize fileio. See fileio.c */
10855 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
10857 /* Take advantage of the fact that the LWP field is not used, to tag
10858 special ptids with it set to != 0. */
10859 magic_null_ptid
= ptid_build (42000, 1, -1);
10860 not_sent_ptid
= ptid_build (42000, 1, -2);
10861 any_thread_ptid
= ptid_build (42000, 1, 0);
10863 target_buf_size
= 2048;
10864 target_buf
= xmalloc (target_buf_size
);