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\n"), 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 /* Stub for catch_exception. */
3102 struct start_remote_args
3106 /* The current target. */
3107 struct target_ops
*target
;
3109 /* Non-zero if this is an extended-remote target. */
3113 /* Send interrupt_sequence to remote target. */
3115 send_interrupt_sequence ()
3117 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
3118 serial_write (remote_desc
, "\x03", 1);
3119 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
3120 serial_send_break (remote_desc
);
3121 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
3123 serial_send_break (remote_desc
);
3124 serial_write (remote_desc
, "g", 1);
3127 internal_error (__FILE__
, __LINE__
,
3128 _("Invalid value for interrupt_sequence_mode: %s."),
3129 interrupt_sequence_mode
);
3133 remote_start_remote (struct ui_out
*uiout
, void *opaque
)
3135 struct start_remote_args
*args
= opaque
;
3136 struct remote_state
*rs
= get_remote_state ();
3137 struct packet_config
*noack_config
;
3138 char *wait_status
= NULL
;
3140 immediate_quit
++; /* Allow user to interrupt it. */
3142 /* Ack any packet which the remote side has already sent. */
3143 serial_write (remote_desc
, "+", 1);
3145 if (interrupt_on_connect
)
3146 send_interrupt_sequence ();
3148 /* The first packet we send to the target is the optional "supported
3149 packets" request. If the target can answer this, it will tell us
3150 which later probes to skip. */
3151 remote_query_supported ();
3153 /* If the stub wants to get a QAllow, compose one and send it. */
3154 if (remote_protocol_packets
[PACKET_QAllow
].support
!= PACKET_DISABLE
)
3155 remote_set_permissions ();
3157 /* Next, we possibly activate noack mode.
3159 If the QStartNoAckMode packet configuration is set to AUTO,
3160 enable noack mode if the stub reported a wish for it with
3163 If set to TRUE, then enable noack mode even if the stub didn't
3164 report it in qSupported. If the stub doesn't reply OK, the
3165 session ends with an error.
3167 If FALSE, then don't activate noack mode, regardless of what the
3168 stub claimed should be the default with qSupported. */
3170 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
3172 if (noack_config
->detect
== AUTO_BOOLEAN_TRUE
3173 || (noack_config
->detect
== AUTO_BOOLEAN_AUTO
3174 && noack_config
->support
== PACKET_ENABLE
))
3176 putpkt ("QStartNoAckMode");
3177 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3178 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
3182 if (args
->extended_p
)
3184 /* Tell the remote that we are using the extended protocol. */
3186 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3189 /* Next, if the target can specify a description, read it. We do
3190 this before anything involving memory or registers. */
3191 target_find_description ();
3193 /* Next, now that we know something about the target, update the
3194 address spaces in the program spaces. */
3195 update_address_spaces ();
3197 /* On OSs where the list of libraries is global to all
3198 processes, we fetch them early. */
3199 if (gdbarch_has_global_solist (target_gdbarch
))
3200 solib_add (NULL
, args
->from_tty
, args
->target
, auto_solib_add
);
3204 if (!rs
->non_stop_aware
)
3205 error (_("Non-stop mode requested, but remote "
3206 "does not support non-stop"));
3208 putpkt ("QNonStop:1");
3209 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3211 if (strcmp (rs
->buf
, "OK") != 0)
3212 error (_("Remote refused setting non-stop mode with: %s"), rs
->buf
);
3214 /* Find about threads and processes the stub is already
3215 controlling. We default to adding them in the running state.
3216 The '?' query below will then tell us about which threads are
3218 remote_threads_info (args
->target
);
3220 else if (rs
->non_stop_aware
)
3222 /* Don't assume that the stub can operate in all-stop mode.
3223 Request it explicitely. */
3224 putpkt ("QNonStop:0");
3225 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3227 if (strcmp (rs
->buf
, "OK") != 0)
3228 error (_("Remote refused setting all-stop mode with: %s"), rs
->buf
);
3231 /* Check whether the target is running now. */
3233 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3237 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
3239 if (!args
->extended_p
)
3240 error (_("The target is not running (try extended-remote?)"));
3242 /* We're connected, but not running. Drop out before we
3243 call start_remote. */
3248 /* Save the reply for later. */
3249 wait_status
= alloca (strlen (rs
->buf
) + 1);
3250 strcpy (wait_status
, rs
->buf
);
3253 /* Let the stub know that we want it to return the thread. */
3254 set_continue_thread (minus_one_ptid
);
3256 /* Without this, some commands which require an active target
3257 (such as kill) won't work. This variable serves (at least)
3258 double duty as both the pid of the target process (if it has
3259 such), and as a flag indicating that a target is active.
3260 These functions should be split out into seperate variables,
3261 especially since GDB will someday have a notion of debugging
3262 several processes. */
3263 inferior_ptid
= magic_null_ptid
;
3265 /* Now, if we have thread information, update inferior_ptid. */
3266 inferior_ptid
= remote_current_thread (inferior_ptid
);
3268 remote_add_inferior (ptid_get_pid (inferior_ptid
), -1);
3270 /* Always add the main thread. */
3271 add_thread_silent (inferior_ptid
);
3273 get_offsets (); /* Get text, data & bss offsets. */
3275 /* If we could not find a description using qXfer, and we know
3276 how to do it some other way, try again. This is not
3277 supported for non-stop; it could be, but it is tricky if
3278 there are no stopped threads when we connect. */
3279 if (remote_read_description_p (args
->target
)
3280 && gdbarch_target_desc (target_gdbarch
) == NULL
)
3282 target_clear_description ();
3283 target_find_description ();
3286 /* Use the previously fetched status. */
3287 gdb_assert (wait_status
!= NULL
);
3288 strcpy (rs
->buf
, wait_status
);
3289 rs
->cached_wait_status
= 1;
3292 start_remote (args
->from_tty
); /* Initialize gdb process mechanisms. */
3296 /* Clear WFI global state. Do this before finding about new
3297 threads and inferiors, and setting the current inferior.
3298 Otherwise we would clear the proceed status of the current
3299 inferior when we want its stop_soon state to be preserved
3300 (see notice_new_inferior). */
3301 init_wait_for_inferior ();
3303 /* In non-stop, we will either get an "OK", meaning that there
3304 are no stopped threads at this time; or, a regular stop
3305 reply. In the latter case, there may be more than one thread
3306 stopped --- we pull them all out using the vStopped
3308 if (strcmp (rs
->buf
, "OK") != 0)
3310 struct stop_reply
*stop_reply
;
3311 struct cleanup
*old_chain
;
3313 stop_reply
= stop_reply_xmalloc ();
3314 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
3316 remote_parse_stop_reply (rs
->buf
, stop_reply
);
3317 discard_cleanups (old_chain
);
3319 /* get_pending_stop_replies acks this one, and gets the rest
3321 pending_stop_reply
= stop_reply
;
3322 remote_get_pending_stop_replies ();
3324 /* Make sure that threads that were stopped remain
3326 iterate_over_threads (set_stop_requested_callback
, NULL
);
3329 if (target_can_async_p ())
3330 target_async (inferior_event_handler
, 0);
3332 if (thread_count () == 0)
3334 if (!args
->extended_p
)
3335 error (_("The target is not running (try extended-remote?)"));
3337 /* We're connected, but not running. Drop out before we
3338 call start_remote. */
3342 /* Let the stub know that we want it to return the thread. */
3344 /* Force the stub to choose a thread. */
3345 set_general_thread (null_ptid
);
3348 inferior_ptid
= remote_current_thread (minus_one_ptid
);
3349 if (ptid_equal (inferior_ptid
, minus_one_ptid
))
3350 error (_("remote didn't report the current thread in non-stop mode"));
3352 get_offsets (); /* Get text, data & bss offsets. */
3354 /* In non-stop mode, any cached wait status will be stored in
3355 the stop reply queue. */
3356 gdb_assert (wait_status
== NULL
);
3358 /* Update the remote on signals to silently pass, or more
3359 importantly, which to not ignore, in case a previous session
3360 had set some different set of signals to be ignored. */
3361 remote_pass_signals ();
3364 /* If we connected to a live target, do some additional setup. */
3365 if (target_has_execution
)
3367 if (exec_bfd
) /* No use without an exec file. */
3368 remote_check_symbols (symfile_objfile
);
3371 /* Possibly the target has been engaged in a trace run started
3372 previously; find out where things are at. */
3373 if (remote_get_trace_status (current_trace_status ()) != -1)
3375 struct uploaded_tp
*uploaded_tps
= NULL
;
3376 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
3378 if (current_trace_status ()->running
)
3379 printf_filtered (_("Trace is already running on the target.\n"));
3381 /* Get trace state variables first, they may be checked when
3382 parsing uploaded commands. */
3384 remote_upload_trace_state_variables (&uploaded_tsvs
);
3386 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
3388 remote_upload_tracepoints (&uploaded_tps
);
3390 merge_uploaded_tracepoints (&uploaded_tps
);
3393 /* If breakpoints are global, insert them now. */
3394 if (gdbarch_has_global_breakpoints (target_gdbarch
)
3395 && breakpoints_always_inserted_mode ())
3396 insert_breakpoints ();
3399 /* Open a connection to a remote debugger.
3400 NAME is the filename used for communication. */
3403 remote_open (char *name
, int from_tty
)
3405 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
3408 /* Open a connection to a remote debugger using the extended
3409 remote gdb protocol. NAME is the filename used for communication. */
3412 extended_remote_open (char *name
, int from_tty
)
3414 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
3417 /* Generic code for opening a connection to a remote target. */
3420 init_all_packet_configs (void)
3424 for (i
= 0; i
< PACKET_MAX
; i
++)
3425 update_packet_config (&remote_protocol_packets
[i
]);
3428 /* Symbol look-up. */
3431 remote_check_symbols (struct objfile
*objfile
)
3433 struct remote_state
*rs
= get_remote_state ();
3434 char *msg
, *reply
, *tmp
;
3435 struct minimal_symbol
*sym
;
3438 if (remote_protocol_packets
[PACKET_qSymbol
].support
== PACKET_DISABLE
)
3441 /* Make sure the remote is pointing at the right process. */
3442 set_general_process ();
3444 /* Allocate a message buffer. We can't reuse the input buffer in RS,
3445 because we need both at the same time. */
3446 msg
= alloca (get_remote_packet_size ());
3448 /* Invite target to request symbol lookups. */
3450 putpkt ("qSymbol::");
3451 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3452 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSymbol
]);
3455 while (strncmp (reply
, "qSymbol:", 8) == 0)
3458 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
3460 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
3462 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
3465 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
3466 CORE_ADDR sym_addr
= SYMBOL_VALUE_ADDRESS (sym
);
3468 /* If this is a function address, return the start of code
3469 instead of any data function descriptor. */
3470 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch
,
3474 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
3475 phex_nz (sym_addr
, addr_size
), &reply
[8]);
3479 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3484 static struct serial
*
3485 remote_serial_open (char *name
)
3487 static int udp_warning
= 0;
3489 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
3490 of in ser-tcp.c, because it is the remote protocol assuming that the
3491 serial connection is reliable and not the serial connection promising
3493 if (!udp_warning
&& strncmp (name
, "udp:", 4) == 0)
3495 warning (_("The remote protocol may be unreliable over UDP.\n"
3496 "Some events may be lost, rendering further debugging "
3501 return serial_open (name
);
3504 /* Inform the target of our permission settings. The permission flags
3505 work without this, but if the target knows the settings, it can do
3506 a couple things. First, it can add its own check, to catch cases
3507 that somehow manage to get by the permissions checks in target
3508 methods. Second, if the target is wired to disallow particular
3509 settings (for instance, a system in the field that is not set up to
3510 be able to stop at a breakpoint), it can object to any unavailable
3514 remote_set_permissions (void)
3516 struct remote_state
*rs
= get_remote_state ();
3518 sprintf (rs
->buf
, "QAllow:"
3519 "WriteReg:%x;WriteMem:%x;"
3520 "InsertBreak:%x;InsertTrace:%x;"
3521 "InsertFastTrace:%x;Stop:%x",
3522 may_write_registers
, may_write_memory
,
3523 may_insert_breakpoints
, may_insert_tracepoints
,
3524 may_insert_fast_tracepoints
, may_stop
);
3526 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3528 /* If the target didn't like the packet, warn the user. Do not try
3529 to undo the user's settings, that would just be maddening. */
3530 if (strcmp (rs
->buf
, "OK") != 0)
3531 warning ("Remote refused setting permissions with: %s", rs
->buf
);
3534 /* This type describes each known response to the qSupported
3536 struct protocol_feature
3538 /* The name of this protocol feature. */
3541 /* The default for this protocol feature. */
3542 enum packet_support default_support
;
3544 /* The function to call when this feature is reported, or after
3545 qSupported processing if the feature is not supported.
3546 The first argument points to this structure. The second
3547 argument indicates whether the packet requested support be
3548 enabled, disabled, or probed (or the default, if this function
3549 is being called at the end of processing and this feature was
3550 not reported). The third argument may be NULL; if not NULL, it
3551 is a NUL-terminated string taken from the packet following
3552 this feature's name and an equals sign. */
3553 void (*func
) (const struct protocol_feature
*, enum packet_support
,
3556 /* The corresponding packet for this feature. Only used if
3557 FUNC is remote_supported_packet. */
3562 remote_supported_packet (const struct protocol_feature
*feature
,
3563 enum packet_support support
,
3564 const char *argument
)
3568 warning (_("Remote qSupported response supplied an unexpected value for"
3569 " \"%s\"."), feature
->name
);
3573 if (remote_protocol_packets
[feature
->packet
].support
3574 == PACKET_SUPPORT_UNKNOWN
)
3575 remote_protocol_packets
[feature
->packet
].support
= support
;
3579 remote_packet_size (const struct protocol_feature
*feature
,
3580 enum packet_support support
, const char *value
)
3582 struct remote_state
*rs
= get_remote_state ();
3587 if (support
!= PACKET_ENABLE
)
3590 if (value
== NULL
|| *value
== '\0')
3592 warning (_("Remote target reported \"%s\" without a size."),
3598 packet_size
= strtol (value
, &value_end
, 16);
3599 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
3601 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
3602 feature
->name
, value
);
3606 if (packet_size
> MAX_REMOTE_PACKET_SIZE
)
3608 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
3609 packet_size
, MAX_REMOTE_PACKET_SIZE
);
3610 packet_size
= MAX_REMOTE_PACKET_SIZE
;
3613 /* Record the new maximum packet size. */
3614 rs
->explicit_packet_size
= packet_size
;
3618 remote_multi_process_feature (const struct protocol_feature
*feature
,
3619 enum packet_support support
, const char *value
)
3621 struct remote_state
*rs
= get_remote_state ();
3623 rs
->multi_process_aware
= (support
== PACKET_ENABLE
);
3627 remote_non_stop_feature (const struct protocol_feature
*feature
,
3628 enum packet_support support
, const char *value
)
3630 struct remote_state
*rs
= get_remote_state ();
3632 rs
->non_stop_aware
= (support
== PACKET_ENABLE
);
3636 remote_cond_tracepoint_feature (const struct protocol_feature
*feature
,
3637 enum packet_support support
,
3640 struct remote_state
*rs
= get_remote_state ();
3642 rs
->cond_tracepoints
= (support
== PACKET_ENABLE
);
3646 remote_fast_tracepoint_feature (const struct protocol_feature
*feature
,
3647 enum packet_support support
,
3650 struct remote_state
*rs
= get_remote_state ();
3652 rs
->fast_tracepoints
= (support
== PACKET_ENABLE
);
3656 remote_static_tracepoint_feature (const struct protocol_feature
*feature
,
3657 enum packet_support support
,
3660 struct remote_state
*rs
= get_remote_state ();
3662 rs
->static_tracepoints
= (support
== PACKET_ENABLE
);
3666 remote_disconnected_tracing_feature (const struct protocol_feature
*feature
,
3667 enum packet_support support
,
3670 struct remote_state
*rs
= get_remote_state ();
3672 rs
->disconnected_tracing
= (support
== PACKET_ENABLE
);
3675 static struct protocol_feature remote_protocol_features
[] = {
3676 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
3677 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
3678 PACKET_qXfer_auxv
},
3679 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
3680 PACKET_qXfer_features
},
3681 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
3682 PACKET_qXfer_libraries
},
3683 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
3684 PACKET_qXfer_memory_map
},
3685 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
3686 PACKET_qXfer_spu_read
},
3687 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
3688 PACKET_qXfer_spu_write
},
3689 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
3690 PACKET_qXfer_osdata
},
3691 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
3692 PACKET_qXfer_threads
},
3693 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
3694 PACKET_qXfer_traceframe_info
},
3695 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
3696 PACKET_QPassSignals
},
3697 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
3698 PACKET_QStartNoAckMode
},
3699 { "multiprocess", PACKET_DISABLE
, remote_multi_process_feature
, -1 },
3700 { "QNonStop", PACKET_DISABLE
, remote_non_stop_feature
, -1 },
3701 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
3702 PACKET_qXfer_siginfo_read
},
3703 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
3704 PACKET_qXfer_siginfo_write
},
3705 { "ConditionalTracepoints", PACKET_DISABLE
, remote_cond_tracepoint_feature
,
3706 PACKET_ConditionalTracepoints
},
3707 { "FastTracepoints", PACKET_DISABLE
, remote_fast_tracepoint_feature
,
3708 PACKET_FastTracepoints
},
3709 { "StaticTracepoints", PACKET_DISABLE
, remote_static_tracepoint_feature
,
3710 PACKET_StaticTracepoints
},
3711 { "DisconnectedTracing", PACKET_DISABLE
, remote_disconnected_tracing_feature
,
3713 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
3715 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
3717 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
3718 PACKET_TracepointSource
},
3719 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
3723 static char *remote_support_xml
;
3725 /* Register string appended to "xmlRegisters=" in qSupported query. */
3728 register_remote_support_xml (const char *xml
)
3730 #if defined(HAVE_LIBEXPAT)
3731 if (remote_support_xml
== NULL
)
3732 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
3735 char *copy
= xstrdup (remote_support_xml
+ 13);
3736 char *p
= strtok (copy
, ",");
3740 if (strcmp (p
, xml
) == 0)
3747 while ((p
= strtok (NULL
, ",")) != NULL
);
3750 remote_support_xml
= reconcat (remote_support_xml
,
3751 remote_support_xml
, ",", xml
,
3758 remote_query_supported_append (char *msg
, const char *append
)
3761 return reconcat (msg
, msg
, ";", append
, (char *) NULL
);
3763 return xstrdup (append
);
3767 remote_query_supported (void)
3769 struct remote_state
*rs
= get_remote_state ();
3772 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
3774 /* The packet support flags are handled differently for this packet
3775 than for most others. We treat an error, a disabled packet, and
3776 an empty response identically: any features which must be reported
3777 to be used will be automatically disabled. An empty buffer
3778 accomplishes this, since that is also the representation for a list
3779 containing no features. */
3782 if (remote_protocol_packets
[PACKET_qSupported
].support
!= PACKET_DISABLE
)
3785 struct cleanup
*old_chain
= make_cleanup (free_current_contents
, &q
);
3788 q
= remote_query_supported_append (q
, "multiprocess+");
3790 if (remote_support_xml
)
3791 q
= remote_query_supported_append (q
, remote_support_xml
);
3793 q
= remote_query_supported_append (q
, "qRelocInsn+");
3795 q
= reconcat (q
, "qSupported:", q
, (char *) NULL
);
3798 do_cleanups (old_chain
);
3800 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3802 /* If an error occured, warn, but do not return - just reset the
3803 buffer to empty and go on to disable features. */
3804 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
3807 warning (_("Remote failure reply: %s"), rs
->buf
);
3812 memset (seen
, 0, sizeof (seen
));
3817 enum packet_support is_supported
;
3818 char *p
, *end
, *name_end
, *value
;
3820 /* First separate out this item from the rest of the packet. If
3821 there's another item after this, we overwrite the separator
3822 (terminated strings are much easier to work with). */
3824 end
= strchr (p
, ';');
3827 end
= p
+ strlen (p
);
3837 warning (_("empty item in \"qSupported\" response"));
3842 name_end
= strchr (p
, '=');
3845 /* This is a name=value entry. */
3846 is_supported
= PACKET_ENABLE
;
3847 value
= name_end
+ 1;
3856 is_supported
= PACKET_ENABLE
;
3860 is_supported
= PACKET_DISABLE
;
3864 is_supported
= PACKET_SUPPORT_UNKNOWN
;
3868 warning (_("unrecognized item \"%s\" "
3869 "in \"qSupported\" response"), p
);
3875 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3876 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
3878 const struct protocol_feature
*feature
;
3881 feature
= &remote_protocol_features
[i
];
3882 feature
->func (feature
, is_supported
, value
);
3887 /* If we increased the packet size, make sure to increase the global
3888 buffer size also. We delay this until after parsing the entire
3889 qSupported packet, because this is the same buffer we were
3891 if (rs
->buf_size
< rs
->explicit_packet_size
)
3893 rs
->buf_size
= rs
->explicit_packet_size
;
3894 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
3897 /* Handle the defaults for unmentioned features. */
3898 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3901 const struct protocol_feature
*feature
;
3903 feature
= &remote_protocol_features
[i
];
3904 feature
->func (feature
, feature
->default_support
, NULL
);
3910 remote_open_1 (char *name
, int from_tty
,
3911 struct target_ops
*target
, int extended_p
)
3913 struct remote_state
*rs
= get_remote_state ();
3916 error (_("To open a remote debug connection, you need to specify what\n"
3917 "serial device is attached to the remote system\n"
3918 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
3920 /* See FIXME above. */
3921 if (!target_async_permitted
)
3922 wait_forever_enabled_p
= 1;
3924 /* If we're connected to a running target, target_preopen will kill it.
3925 But if we're connected to a target system with no running process,
3926 then we will still be connected when it returns. Ask this question
3927 first, before target_preopen has a chance to kill anything. */
3928 if (remote_desc
!= NULL
&& !have_inferiors ())
3931 || query (_("Already connected to a remote target. Disconnect? ")))
3934 error (_("Still connected."));
3937 target_preopen (from_tty
);
3939 unpush_target (target
);
3941 /* This time without a query. If we were connected to an
3942 extended-remote target and target_preopen killed the running
3943 process, we may still be connected. If we are starting "target
3944 remote" now, the extended-remote target will not have been
3945 removed by unpush_target. */
3946 if (remote_desc
!= NULL
&& !have_inferiors ())
3949 /* Make sure we send the passed signals list the next time we resume. */
3950 xfree (last_pass_packet
);
3951 last_pass_packet
= NULL
;
3953 remote_fileio_reset ();
3954 reopen_exec_file ();
3957 remote_desc
= remote_serial_open (name
);
3959 perror_with_name (name
);
3961 if (baud_rate
!= -1)
3963 if (serial_setbaudrate (remote_desc
, baud_rate
))
3965 /* The requested speed could not be set. Error out to
3966 top level after closing remote_desc. Take care to
3967 set remote_desc to NULL to avoid closing remote_desc
3969 serial_close (remote_desc
);
3971 perror_with_name (name
);
3975 serial_raw (remote_desc
);
3977 /* If there is something sitting in the buffer we might take it as a
3978 response to a command, which would be bad. */
3979 serial_flush_input (remote_desc
);
3983 puts_filtered ("Remote debugging using ");
3984 puts_filtered (name
);
3985 puts_filtered ("\n");
3987 push_target (target
); /* Switch to using remote target now. */
3989 /* Register extra event sources in the event loop. */
3990 remote_async_inferior_event_token
3991 = create_async_event_handler (remote_async_inferior_event_handler
,
3993 remote_async_get_pending_events_token
3994 = create_async_event_handler (remote_async_get_pending_events_handler
,
3997 /* Reset the target state; these things will be queried either by
3998 remote_query_supported or as they are needed. */
3999 init_all_packet_configs ();
4000 rs
->cached_wait_status
= 0;
4001 rs
->explicit_packet_size
= 0;
4003 rs
->multi_process_aware
= 0;
4004 rs
->extended
= extended_p
;
4005 rs
->non_stop_aware
= 0;
4006 rs
->waiting_for_stop_reply
= 0;
4007 rs
->ctrlc_pending_p
= 0;
4009 general_thread
= not_sent_ptid
;
4010 continue_thread
= not_sent_ptid
;
4011 remote_traceframe_number
= -1;
4013 /* Probe for ability to use "ThreadInfo" query, as required. */
4014 use_threadinfo_query
= 1;
4015 use_threadextra_query
= 1;
4017 if (target_async_permitted
)
4019 /* With this target we start out by owning the terminal. */
4020 remote_async_terminal_ours_p
= 1;
4022 /* FIXME: cagney/1999-09-23: During the initial connection it is
4023 assumed that the target is already ready and able to respond to
4024 requests. Unfortunately remote_start_remote() eventually calls
4025 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
4026 around this. Eventually a mechanism that allows
4027 wait_for_inferior() to expect/get timeouts will be
4029 wait_forever_enabled_p
= 0;
4032 /* First delete any symbols previously loaded from shared libraries. */
4033 no_shared_libraries (NULL
, 0);
4036 init_thread_list ();
4038 /* Start the remote connection. If error() or QUIT, discard this
4039 target (we'd otherwise be in an inconsistent state) and then
4040 propogate the error on up the exception chain. This ensures that
4041 the caller doesn't stumble along blindly assuming that the
4042 function succeeded. The CLI doesn't have this problem but other
4043 UI's, such as MI do.
4045 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
4046 this function should return an error indication letting the
4047 caller restore the previous state. Unfortunately the command
4048 ``target remote'' is directly wired to this function making that
4049 impossible. On a positive note, the CLI side of this problem has
4050 been fixed - the function set_cmd_context() makes it possible for
4051 all the ``target ....'' commands to share a common callback
4052 function. See cli-dump.c. */
4054 struct gdb_exception ex
;
4055 struct start_remote_args args
;
4057 args
.from_tty
= from_tty
;
4058 args
.target
= target
;
4059 args
.extended_p
= extended_p
;
4061 ex
= catch_exception (uiout
, remote_start_remote
, &args
, RETURN_MASK_ALL
);
4064 /* Pop the partially set up target - unless something else did
4065 already before throwing the exception. */
4066 if (remote_desc
!= NULL
)
4068 if (target_async_permitted
)
4069 wait_forever_enabled_p
= 1;
4070 throw_exception (ex
);
4074 if (target_async_permitted
)
4075 wait_forever_enabled_p
= 1;
4078 /* This takes a program previously attached to and detaches it. After
4079 this is done, GDB can be used to debug some other program. We
4080 better not have left any breakpoints in the target program or it'll
4081 die when it hits one. */
4084 remote_detach_1 (char *args
, int from_tty
, int extended
)
4086 int pid
= ptid_get_pid (inferior_ptid
);
4087 struct remote_state
*rs
= get_remote_state ();
4090 error (_("Argument given to \"detach\" when remotely debugging."));
4092 if (!target_has_execution
)
4093 error (_("No process to detach from."));
4095 /* Tell the remote target to detach. */
4096 if (remote_multi_process_p (rs
))
4097 sprintf (rs
->buf
, "D;%x", pid
);
4099 strcpy (rs
->buf
, "D");
4102 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4104 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
4106 else if (rs
->buf
[0] == '\0')
4107 error (_("Remote doesn't know how to detach"));
4109 error (_("Can't detach process."));
4113 if (remote_multi_process_p (rs
))
4114 printf_filtered (_("Detached from remote %s.\n"),
4115 target_pid_to_str (pid_to_ptid (pid
)));
4119 puts_filtered (_("Detached from remote process.\n"));
4121 puts_filtered (_("Ending remote debugging.\n"));
4125 discard_pending_stop_replies (pid
);
4126 target_mourn_inferior ();
4130 remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
4132 remote_detach_1 (args
, from_tty
, 0);
4136 extended_remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
4138 remote_detach_1 (args
, from_tty
, 1);
4141 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
4144 remote_disconnect (struct target_ops
*target
, char *args
, int from_tty
)
4147 error (_("Argument given to \"disconnect\" when remotely debugging."));
4149 /* Make sure we unpush even the extended remote targets; mourn
4150 won't do it. So call remote_mourn_1 directly instead of
4151 target_mourn_inferior. */
4152 remote_mourn_1 (target
);
4155 puts_filtered ("Ending remote debugging.\n");
4158 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
4159 be chatty about it. */
4162 extended_remote_attach_1 (struct target_ops
*target
, char *args
, int from_tty
)
4164 struct remote_state
*rs
= get_remote_state ();
4166 char *wait_status
= NULL
;
4168 pid
= parse_pid_to_attach (args
);
4170 /* Remote PID can be freely equal to getpid, do not check it here the same
4171 way as in other targets. */
4173 if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
4174 error (_("This target does not support attaching to a process"));
4176 sprintf (rs
->buf
, "vAttach;%x", pid
);
4178 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4180 if (packet_ok (rs
->buf
,
4181 &remote_protocol_packets
[PACKET_vAttach
]) == PACKET_OK
)
4184 printf_unfiltered (_("Attached to %s\n"),
4185 target_pid_to_str (pid_to_ptid (pid
)));
4189 /* Save the reply for later. */
4190 wait_status
= alloca (strlen (rs
->buf
) + 1);
4191 strcpy (wait_status
, rs
->buf
);
4193 else if (strcmp (rs
->buf
, "OK") != 0)
4194 error (_("Attaching to %s failed with: %s"),
4195 target_pid_to_str (pid_to_ptid (pid
)),
4198 else if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
4199 error (_("This target does not support attaching to a process"));
4201 error (_("Attaching to %s failed"),
4202 target_pid_to_str (pid_to_ptid (pid
)));
4204 set_current_inferior (remote_add_inferior (pid
, 1));
4206 inferior_ptid
= pid_to_ptid (pid
);
4210 struct thread_info
*thread
;
4212 /* Get list of threads. */
4213 remote_threads_info (target
);
4215 thread
= first_thread_of_process (pid
);
4217 inferior_ptid
= thread
->ptid
;
4219 inferior_ptid
= pid_to_ptid (pid
);
4221 /* Invalidate our notion of the remote current thread. */
4222 record_currthread (minus_one_ptid
);
4226 /* Now, if we have thread information, update inferior_ptid. */
4227 inferior_ptid
= remote_current_thread (inferior_ptid
);
4229 /* Add the main thread to the thread list. */
4230 add_thread_silent (inferior_ptid
);
4233 /* Next, if the target can specify a description, read it. We do
4234 this before anything involving memory or registers. */
4235 target_find_description ();
4239 /* Use the previously fetched status. */
4240 gdb_assert (wait_status
!= NULL
);
4242 if (target_can_async_p ())
4244 struct stop_reply
*stop_reply
;
4245 struct cleanup
*old_chain
;
4247 stop_reply
= stop_reply_xmalloc ();
4248 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
4249 remote_parse_stop_reply (wait_status
, stop_reply
);
4250 discard_cleanups (old_chain
);
4251 push_stop_reply (stop_reply
);
4253 target_async (inferior_event_handler
, 0);
4257 gdb_assert (wait_status
!= NULL
);
4258 strcpy (rs
->buf
, wait_status
);
4259 rs
->cached_wait_status
= 1;
4263 gdb_assert (wait_status
== NULL
);
4267 extended_remote_attach (struct target_ops
*ops
, char *args
, int from_tty
)
4269 extended_remote_attach_1 (ops
, args
, from_tty
);
4272 /* Convert hex digit A to a number. */
4277 if (a
>= '0' && a
<= '9')
4279 else if (a
>= 'a' && a
<= 'f')
4280 return a
- 'a' + 10;
4281 else if (a
>= 'A' && a
<= 'F')
4282 return a
- 'A' + 10;
4284 error (_("Reply contains invalid hex digit %d"), a
);
4288 hex2bin (const char *hex
, gdb_byte
*bin
, int count
)
4292 for (i
= 0; i
< count
; i
++)
4294 if (hex
[0] == 0 || hex
[1] == 0)
4296 /* Hex string is short, or of uneven length.
4297 Return the count that has been converted so far. */
4300 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
4306 /* Convert number NIB to a hex digit. */
4314 return 'a' + nib
- 10;
4318 bin2hex (const gdb_byte
*bin
, char *hex
, int count
)
4322 /* May use a length, or a nul-terminated string as input. */
4324 count
= strlen ((char *) bin
);
4326 for (i
= 0; i
< count
; i
++)
4328 *hex
++ = tohex ((*bin
>> 4) & 0xf);
4329 *hex
++ = tohex (*bin
++ & 0xf);
4335 /* Check for the availability of vCont. This function should also check
4339 remote_vcont_probe (struct remote_state
*rs
)
4343 strcpy (rs
->buf
, "vCont?");
4345 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4348 /* Make sure that the features we assume are supported. */
4349 if (strncmp (buf
, "vCont", 5) == 0)
4352 int support_s
, support_S
, support_c
, support_C
;
4358 rs
->support_vCont_t
= 0;
4359 while (p
&& *p
== ';')
4362 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4364 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4366 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4368 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4370 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4371 rs
->support_vCont_t
= 1;
4373 p
= strchr (p
, ';');
4376 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
4377 BUF will make packet_ok disable the packet. */
4378 if (!support_s
|| !support_S
|| !support_c
|| !support_C
)
4382 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
4385 /* Helper function for building "vCont" resumptions. Write a
4386 resumption to P. ENDP points to one-passed-the-end of the buffer
4387 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
4388 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
4389 resumed thread should be single-stepped and/or signalled. If PTID
4390 equals minus_one_ptid, then all threads are resumed; if PTID
4391 represents a process, then all threads of the process are resumed;
4392 the thread to be stepped and/or signalled is given in the global
4396 append_resumption (char *p
, char *endp
,
4397 ptid_t ptid
, int step
, enum target_signal siggnal
)
4399 struct remote_state
*rs
= get_remote_state ();
4401 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
4402 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
4404 p
+= xsnprintf (p
, endp
- p
, ";s");
4405 else if (siggnal
!= TARGET_SIGNAL_0
)
4406 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
4408 p
+= xsnprintf (p
, endp
- p
, ";c");
4410 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
4414 /* All (-1) threads of process. */
4415 nptid
= ptid_build (ptid_get_pid (ptid
), 0, -1);
4417 p
+= xsnprintf (p
, endp
- p
, ":");
4418 p
= write_ptid (p
, endp
, nptid
);
4420 else if (!ptid_equal (ptid
, minus_one_ptid
))
4422 p
+= xsnprintf (p
, endp
- p
, ":");
4423 p
= write_ptid (p
, endp
, ptid
);
4429 /* Resume the remote inferior by using a "vCont" packet. The thread
4430 to be resumed is PTID; STEP and SIGGNAL indicate whether the
4431 resumed thread should be single-stepped and/or signalled. If PTID
4432 equals minus_one_ptid, then all threads are resumed; the thread to
4433 be stepped and/or signalled is given in the global INFERIOR_PTID.
4434 This function returns non-zero iff it resumes the inferior.
4436 This function issues a strict subset of all possible vCont commands at the
4440 remote_vcont_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
4442 struct remote_state
*rs
= get_remote_state ();
4446 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
4447 remote_vcont_probe (rs
);
4449 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_DISABLE
)
4453 endp
= rs
->buf
+ get_remote_packet_size ();
4455 /* If we could generate a wider range of packets, we'd have to worry
4456 about overflowing BUF. Should there be a generic
4457 "multi-part-packet" packet? */
4459 p
+= xsnprintf (p
, endp
- p
, "vCont");
4461 if (ptid_equal (ptid
, magic_null_ptid
))
4463 /* MAGIC_NULL_PTID means that we don't have any active threads,
4464 so we don't have any TID numbers the inferior will
4465 understand. Make sure to only send forms that do not specify
4467 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
4469 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
4471 /* Resume all threads (of all processes, or of a single
4472 process), with preference for INFERIOR_PTID. This assumes
4473 inferior_ptid belongs to the set of all threads we are about
4475 if (step
|| siggnal
!= TARGET_SIGNAL_0
)
4477 /* Step inferior_ptid, with or without signal. */
4478 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
4481 /* And continue others without a signal. */
4482 append_resumption (p
, endp
, ptid
, /*step=*/ 0, TARGET_SIGNAL_0
);
4486 /* Scheduler locking; resume only PTID. */
4487 append_resumption (p
, endp
, ptid
, step
, siggnal
);
4490 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
4495 /* In non-stop, the stub replies to vCont with "OK". The stop
4496 reply will be reported asynchronously by means of a `%Stop'
4498 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4499 if (strcmp (rs
->buf
, "OK") != 0)
4500 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
4506 /* Tell the remote machine to resume. */
4508 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
4510 static int last_sent_step
;
4513 remote_resume (struct target_ops
*ops
,
4514 ptid_t ptid
, int step
, enum target_signal siggnal
)
4516 struct remote_state
*rs
= get_remote_state ();
4519 last_sent_signal
= siggnal
;
4520 last_sent_step
= step
;
4522 /* Update the inferior on signals to silently pass, if they've changed. */
4523 remote_pass_signals ();
4525 /* The vCont packet doesn't need to specify threads via Hc. */
4526 /* No reverse support (yet) for vCont. */
4527 if (execution_direction
!= EXEC_REVERSE
)
4528 if (remote_vcont_resume (ptid
, step
, siggnal
))
4531 /* All other supported resume packets do use Hc, so set the continue
4533 if (ptid_equal (ptid
, minus_one_ptid
))
4534 set_continue_thread (any_thread_ptid
);
4536 set_continue_thread (ptid
);
4539 if (execution_direction
== EXEC_REVERSE
)
4541 /* We don't pass signals to the target in reverse exec mode. */
4542 if (info_verbose
&& siggnal
!= TARGET_SIGNAL_0
)
4543 warning (" - Can't pass signal %d to target in reverse: ignored.\n",
4547 && remote_protocol_packets
[PACKET_bs
].support
== PACKET_DISABLE
)
4548 error (_("Remote reverse-step not supported."));
4550 && remote_protocol_packets
[PACKET_bc
].support
== PACKET_DISABLE
)
4551 error (_("Remote reverse-continue not supported."));
4553 strcpy (buf
, step
? "bs" : "bc");
4555 else if (siggnal
!= TARGET_SIGNAL_0
)
4557 buf
[0] = step
? 'S' : 'C';
4558 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
4559 buf
[2] = tohex (((int) siggnal
) & 0xf);
4563 strcpy (buf
, step
? "s" : "c");
4568 /* We are about to start executing the inferior, let's register it
4569 with the event loop. NOTE: this is the one place where all the
4570 execution commands end up. We could alternatively do this in each
4571 of the execution commands in infcmd.c. */
4572 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
4573 into infcmd.c in order to allow inferior function calls to work
4574 NOT asynchronously. */
4575 if (target_can_async_p ())
4576 target_async (inferior_event_handler
, 0);
4578 /* We've just told the target to resume. The remote server will
4579 wait for the inferior to stop, and then send a stop reply. In
4580 the mean time, we can't start another command/query ourselves
4581 because the stub wouldn't be ready to process it. This applies
4582 only to the base all-stop protocol, however. In non-stop (which
4583 only supports vCont), the stub replies with an "OK", and is
4584 immediate able to process further serial input. */
4586 rs
->waiting_for_stop_reply
= 1;
4590 /* Set up the signal handler for SIGINT, while the target is
4591 executing, ovewriting the 'regular' SIGINT signal handler. */
4593 initialize_sigint_signal_handler (void)
4595 signal (SIGINT
, handle_remote_sigint
);
4598 /* Signal handler for SIGINT, while the target is executing. */
4600 handle_remote_sigint (int sig
)
4602 signal (sig
, handle_remote_sigint_twice
);
4603 mark_async_signal_handler_wrapper (sigint_remote_token
);
4606 /* Signal handler for SIGINT, installed after SIGINT has already been
4607 sent once. It will take effect the second time that the user sends
4610 handle_remote_sigint_twice (int sig
)
4612 signal (sig
, handle_remote_sigint
);
4613 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
4616 /* Perform the real interruption of the target execution, in response
4619 async_remote_interrupt (gdb_client_data arg
)
4622 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
4624 target_stop (inferior_ptid
);
4627 /* Perform interrupt, if the first attempt did not succeed. Just give
4628 up on the target alltogether. */
4630 async_remote_interrupt_twice (gdb_client_data arg
)
4633 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
4638 /* Reinstall the usual SIGINT handlers, after the target has
4641 cleanup_sigint_signal_handler (void *dummy
)
4643 signal (SIGINT
, handle_sigint
);
4646 /* Send ^C to target to halt it. Target will respond, and send us a
4648 static void (*ofunc
) (int);
4650 /* The command line interface's stop routine. This function is installed
4651 as a signal handler for SIGINT. The first time a user requests a
4652 stop, we call remote_stop to send a break or ^C. If there is no
4653 response from the target (it didn't stop when the user requested it),
4654 we ask the user if he'd like to detach from the target. */
4656 remote_interrupt (int signo
)
4658 /* If this doesn't work, try more severe steps. */
4659 signal (signo
, remote_interrupt_twice
);
4661 gdb_call_async_signal_handler (sigint_remote_token
, 1);
4664 /* The user typed ^C twice. */
4667 remote_interrupt_twice (int signo
)
4669 signal (signo
, ofunc
);
4670 gdb_call_async_signal_handler (sigint_remote_twice_token
, 1);
4671 signal (signo
, remote_interrupt
);
4674 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
4675 thread, all threads of a remote process, or all threads of all
4679 remote_stop_ns (ptid_t ptid
)
4681 struct remote_state
*rs
= get_remote_state ();
4683 char *endp
= rs
->buf
+ get_remote_packet_size ();
4685 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
4686 remote_vcont_probe (rs
);
4688 if (!rs
->support_vCont_t
)
4689 error (_("Remote server does not support stopping threads"));
4691 if (ptid_equal (ptid
, minus_one_ptid
)
4692 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
4693 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
4698 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
4700 if (ptid_is_pid (ptid
))
4701 /* All (-1) threads of process. */
4702 nptid
= ptid_build (ptid_get_pid (ptid
), 0, -1);
4705 /* Small optimization: if we already have a stop reply for
4706 this thread, no use in telling the stub we want this
4708 if (peek_stop_reply (ptid
))
4714 write_ptid (p
, endp
, nptid
);
4717 /* In non-stop, we get an immediate OK reply. The stop reply will
4718 come in asynchronously by notification. */
4720 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4721 if (strcmp (rs
->buf
, "OK") != 0)
4722 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
4725 /* All-stop version of target_stop. Sends a break or a ^C to stop the
4726 remote target. It is undefined which thread of which process
4727 reports the stop. */
4730 remote_stop_as (ptid_t ptid
)
4732 struct remote_state
*rs
= get_remote_state ();
4734 rs
->ctrlc_pending_p
= 1;
4736 /* If the inferior is stopped already, but the core didn't know
4737 about it yet, just ignore the request. The cached wait status
4738 will be collected in remote_wait. */
4739 if (rs
->cached_wait_status
)
4742 /* Send interrupt_sequence to remote target. */
4743 send_interrupt_sequence ();
4746 /* This is the generic stop called via the target vector. When a target
4747 interrupt is requested, either by the command line or the GUI, we
4748 will eventually end up here. */
4751 remote_stop (ptid_t ptid
)
4754 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
4757 remote_stop_ns (ptid
);
4759 remote_stop_as (ptid
);
4762 /* Ask the user what to do when an interrupt is received. */
4765 interrupt_query (void)
4767 target_terminal_ours ();
4769 if (target_can_async_p ())
4771 signal (SIGINT
, handle_sigint
);
4772 deprecated_throw_reason (RETURN_QUIT
);
4776 if (query (_("Interrupted while waiting for the program.\n\
4777 Give up (and stop debugging it)? ")))
4780 deprecated_throw_reason (RETURN_QUIT
);
4784 target_terminal_inferior ();
4787 /* Enable/disable target terminal ownership. Most targets can use
4788 terminal groups to control terminal ownership. Remote targets are
4789 different in that explicit transfer of ownership to/from GDB/target
4793 remote_terminal_inferior (void)
4795 if (!target_async_permitted
)
4796 /* Nothing to do. */
4799 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
4800 idempotent. The event-loop GDB talking to an asynchronous target
4801 with a synchronous command calls this function from both
4802 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
4803 transfer the terminal to the target when it shouldn't this guard
4805 if (!remote_async_terminal_ours_p
)
4807 delete_file_handler (input_fd
);
4808 remote_async_terminal_ours_p
= 0;
4809 initialize_sigint_signal_handler ();
4810 /* NOTE: At this point we could also register our selves as the
4811 recipient of all input. Any characters typed could then be
4812 passed on down to the target. */
4816 remote_terminal_ours (void)
4818 if (!target_async_permitted
)
4819 /* Nothing to do. */
4822 /* See FIXME in remote_terminal_inferior. */
4823 if (remote_async_terminal_ours_p
)
4825 cleanup_sigint_signal_handler (NULL
);
4826 add_file_handler (input_fd
, stdin_event_handler
, 0);
4827 remote_async_terminal_ours_p
= 1;
4831 remote_console_output (char *msg
)
4835 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
4838 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
4842 fputs_unfiltered (tb
, gdb_stdtarg
);
4844 gdb_flush (gdb_stdtarg
);
4847 typedef struct cached_reg
4850 gdb_byte data
[MAX_REGISTER_SIZE
];
4853 DEF_VEC_O(cached_reg_t
);
4857 struct stop_reply
*next
;
4861 struct target_waitstatus ws
;
4863 VEC(cached_reg_t
) *regcache
;
4865 int stopped_by_watchpoint_p
;
4866 CORE_ADDR watch_data_address
;
4874 /* The list of already fetched and acknowledged stop events. */
4875 static struct stop_reply
*stop_reply_queue
;
4877 static struct stop_reply
*
4878 stop_reply_xmalloc (void)
4880 struct stop_reply
*r
= XMALLOC (struct stop_reply
);
4887 stop_reply_xfree (struct stop_reply
*r
)
4891 VEC_free (cached_reg_t
, r
->regcache
);
4896 /* Discard all pending stop replies of inferior PID. If PID is -1,
4897 discard everything. */
4900 discard_pending_stop_replies (int pid
)
4902 struct stop_reply
*prev
= NULL
, *reply
, *next
;
4904 /* Discard the in-flight notification. */
4905 if (pending_stop_reply
!= NULL
4907 || ptid_get_pid (pending_stop_reply
->ptid
) == pid
))
4909 stop_reply_xfree (pending_stop_reply
);
4910 pending_stop_reply
= NULL
;
4913 /* Discard the stop replies we have already pulled with
4915 for (reply
= stop_reply_queue
; reply
; reply
= next
)
4919 || ptid_get_pid (reply
->ptid
) == pid
)
4921 if (reply
== stop_reply_queue
)
4922 stop_reply_queue
= reply
->next
;
4924 prev
->next
= reply
->next
;
4926 stop_reply_xfree (reply
);
4933 /* Cleanup wrapper. */
4936 do_stop_reply_xfree (void *arg
)
4938 struct stop_reply
*r
= arg
;
4940 stop_reply_xfree (r
);
4943 /* Look for a queued stop reply belonging to PTID. If one is found,
4944 remove it from the queue, and return it. Returns NULL if none is
4945 found. If there are still queued events left to process, tell the
4946 event loop to get back to target_wait soon. */
4948 static struct stop_reply
*
4949 queued_stop_reply (ptid_t ptid
)
4951 struct stop_reply
*it
;
4952 struct stop_reply
**it_link
;
4954 it
= stop_reply_queue
;
4955 it_link
= &stop_reply_queue
;
4958 if (ptid_match (it
->ptid
, ptid
))
4960 *it_link
= it
->next
;
4965 it_link
= &it
->next
;
4969 if (stop_reply_queue
)
4970 /* There's still at least an event left. */
4971 mark_async_event_handler (remote_async_inferior_event_token
);
4976 /* Push a fully parsed stop reply in the stop reply queue. Since we
4977 know that we now have at least one queued event left to pass to the
4978 core side, tell the event loop to get back to target_wait soon. */
4981 push_stop_reply (struct stop_reply
*new_event
)
4983 struct stop_reply
*event
;
4985 if (stop_reply_queue
)
4987 for (event
= stop_reply_queue
;
4988 event
&& event
->next
;
4989 event
= event
->next
)
4992 event
->next
= new_event
;
4995 stop_reply_queue
= new_event
;
4997 mark_async_event_handler (remote_async_inferior_event_token
);
5000 /* Returns true if we have a stop reply for PTID. */
5003 peek_stop_reply (ptid_t ptid
)
5005 struct stop_reply
*it
;
5007 for (it
= stop_reply_queue
; it
; it
= it
->next
)
5008 if (ptid_equal (ptid
, it
->ptid
))
5010 if (it
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
5017 /* Parse the stop reply in BUF. Either the function succeeds, and the
5018 result is stored in EVENT, or throws an error. */
5021 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
5023 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5027 event
->ptid
= null_ptid
;
5028 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
5029 event
->ws
.value
.integer
= 0;
5030 event
->solibs_changed
= 0;
5031 event
->replay_event
= 0;
5032 event
->stopped_by_watchpoint_p
= 0;
5033 event
->regcache
= NULL
;
5038 case 'T': /* Status with PC, SP, FP, ... */
5039 /* Expedited reply, containing Signal, {regno, reg} repeat. */
5040 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
5042 n... = register number
5043 r... = register contents
5046 p
= &buf
[3]; /* after Txx */
5054 /* If the packet contains a register number, save it in
5055 pnum and set p1 to point to the character following it.
5056 Otherwise p1 points to p. */
5058 /* If this packet is an awatch packet, don't parse the 'a'
5059 as a register number. */
5061 if (strncmp (p
, "awatch", strlen("awatch")) != 0
5062 && strncmp (p
, "core", strlen ("core") != 0))
5064 /* Read the ``P'' register number. */
5065 pnum
= strtol (p
, &p_temp
, 16);
5071 if (p1
== p
) /* No register number present here. */
5073 p1
= strchr (p
, ':');
5075 error (_("Malformed packet(a) (missing colon): %s\n\
5078 if (strncmp (p
, "thread", p1
- p
) == 0)
5079 event
->ptid
= read_ptid (++p1
, &p
);
5080 else if ((strncmp (p
, "watch", p1
- p
) == 0)
5081 || (strncmp (p
, "rwatch", p1
- p
) == 0)
5082 || (strncmp (p
, "awatch", p1
- p
) == 0))
5084 event
->stopped_by_watchpoint_p
= 1;
5085 p
= unpack_varlen_hex (++p1
, &addr
);
5086 event
->watch_data_address
= (CORE_ADDR
) addr
;
5088 else if (strncmp (p
, "library", p1
- p
) == 0)
5092 while (*p_temp
&& *p_temp
!= ';')
5095 event
->solibs_changed
= 1;
5098 else if (strncmp (p
, "replaylog", p1
- p
) == 0)
5100 /* NO_HISTORY event.
5101 p1 will indicate "begin" or "end", but
5102 it makes no difference for now, so ignore it. */
5103 event
->replay_event
= 1;
5104 p_temp
= strchr (p1
+ 1, ';');
5108 else if (strncmp (p
, "core", p1
- p
) == 0)
5112 p
= unpack_varlen_hex (++p1
, &c
);
5117 /* Silently skip unknown optional info. */
5118 p_temp
= strchr (p1
+ 1, ';');
5125 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
5126 cached_reg_t cached_reg
;
5131 error (_("Malformed packet(b) (missing colon): %s\n\
5137 error (_("Remote sent bad register number %s: %s\n\
5139 hex_string (pnum
), p
, buf
);
5141 cached_reg
.num
= reg
->regnum
;
5143 fieldsize
= hex2bin (p
, cached_reg
.data
,
5144 register_size (target_gdbarch
,
5147 if (fieldsize
< register_size (target_gdbarch
,
5149 warning (_("Remote reply is too short: %s"), buf
);
5151 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
5155 error (_("Remote register badly formatted: %s\nhere: %s"),
5160 case 'S': /* Old style status, just signal only. */
5161 if (event
->solibs_changed
)
5162 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
5163 else if (event
->replay_event
)
5164 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
5167 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
5168 event
->ws
.value
.sig
= (enum target_signal
)
5169 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
5172 case 'W': /* Target exited. */
5179 /* GDB used to accept only 2 hex chars here. Stubs should
5180 only send more if they detect GDB supports multi-process
5182 p
= unpack_varlen_hex (&buf
[1], &value
);
5186 /* The remote process exited. */
5187 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
5188 event
->ws
.value
.integer
= value
;
5192 /* The remote process exited with a signal. */
5193 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
5194 event
->ws
.value
.sig
= (enum target_signal
) value
;
5197 /* If no process is specified, assume inferior_ptid. */
5198 pid
= ptid_get_pid (inferior_ptid
);
5207 else if (strncmp (p
,
5208 "process:", sizeof ("process:") - 1) == 0)
5212 p
+= sizeof ("process:") - 1;
5213 unpack_varlen_hex (p
, &upid
);
5217 error (_("unknown stop reply packet: %s"), buf
);
5220 error (_("unknown stop reply packet: %s"), buf
);
5221 event
->ptid
= pid_to_ptid (pid
);
5226 if (non_stop
&& ptid_equal (event
->ptid
, null_ptid
))
5227 error (_("No process or thread specified in stop reply: %s"), buf
);
5230 /* When the stub wants to tell GDB about a new stop reply, it sends a
5231 stop notification (%Stop). Those can come it at any time, hence,
5232 we have to make sure that any pending putpkt/getpkt sequence we're
5233 making is finished, before querying the stub for more events with
5234 vStopped. E.g., if we started a vStopped sequence immediatelly
5235 upon receiving the %Stop notification, something like this could
5243 1.6) <-- (registers reply to step #1.3)
5245 Obviously, the reply in step #1.6 would be unexpected to a vStopped
5248 To solve this, whenever we parse a %Stop notification sucessfully,
5249 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
5250 doing whatever we were doing:
5256 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
5257 2.5) <-- (registers reply to step #2.3)
5259 Eventualy after step #2.5, we return to the event loop, which
5260 notices there's an event on the
5261 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
5262 associated callback --- the function below. At this point, we're
5263 always safe to start a vStopped sequence. :
5266 2.7) <-- T05 thread:2
5272 remote_get_pending_stop_replies (void)
5274 struct remote_state
*rs
= get_remote_state ();
5276 if (pending_stop_reply
)
5279 putpkt ("vStopped");
5281 /* Now we can rely on it. */
5282 push_stop_reply (pending_stop_reply
);
5283 pending_stop_reply
= NULL
;
5287 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5288 if (strcmp (rs
->buf
, "OK") == 0)
5292 struct cleanup
*old_chain
;
5293 struct stop_reply
*stop_reply
= stop_reply_xmalloc ();
5295 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
5296 remote_parse_stop_reply (rs
->buf
, stop_reply
);
5299 putpkt ("vStopped");
5301 if (stop_reply
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
5303 /* Now we can rely on it. */
5304 discard_cleanups (old_chain
);
5305 push_stop_reply (stop_reply
);
5308 /* We got an unknown stop reply. */
5309 do_cleanups (old_chain
);
5316 /* Called when it is decided that STOP_REPLY holds the info of the
5317 event that is to be returned to the core. This function always
5318 destroys STOP_REPLY. */
5321 process_stop_reply (struct stop_reply
*stop_reply
,
5322 struct target_waitstatus
*status
)
5326 *status
= stop_reply
->ws
;
5327 ptid
= stop_reply
->ptid
;
5329 /* If no thread/process was reported by the stub, assume the current
5331 if (ptid_equal (ptid
, null_ptid
))
5332 ptid
= inferior_ptid
;
5334 if (status
->kind
!= TARGET_WAITKIND_EXITED
5335 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
5337 /* Expedited registers. */
5338 if (stop_reply
->regcache
)
5340 struct regcache
*regcache
5341 = get_thread_arch_regcache (ptid
, target_gdbarch
);
5346 VEC_iterate(cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
5348 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
5349 VEC_free (cached_reg_t
, stop_reply
->regcache
);
5352 remote_stopped_by_watchpoint_p
= stop_reply
->stopped_by_watchpoint_p
;
5353 remote_watch_data_address
= stop_reply
->watch_data_address
;
5355 remote_notice_new_inferior (ptid
, 0);
5356 demand_private_info (ptid
)->core
= stop_reply
->core
;
5359 stop_reply_xfree (stop_reply
);
5363 /* The non-stop mode version of target_wait. */
5366 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
5368 struct remote_state
*rs
= get_remote_state ();
5369 struct stop_reply
*stop_reply
;
5372 /* If in non-stop mode, get out of getpkt even if a
5373 notification is received. */
5375 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
5382 case 'E': /* Error of some sort. */
5383 /* We're out of sync with the target now. Did it continue
5384 or not? We can't tell which thread it was in non-stop,
5385 so just ignore this. */
5386 warning (_("Remote failure reply: %s"), rs
->buf
);
5388 case 'O': /* Console output. */
5389 remote_console_output (rs
->buf
+ 1);
5392 warning (_("Invalid remote reply: %s"), rs
->buf
);
5396 /* Acknowledge a pending stop reply that may have arrived in the
5398 if (pending_stop_reply
!= NULL
)
5399 remote_get_pending_stop_replies ();
5401 /* If indeed we noticed a stop reply, we're done. */
5402 stop_reply
= queued_stop_reply (ptid
);
5403 if (stop_reply
!= NULL
)
5404 return process_stop_reply (stop_reply
, status
);
5406 /* Still no event. If we're just polling for an event, then
5407 return to the event loop. */
5408 if (options
& TARGET_WNOHANG
)
5410 status
->kind
= TARGET_WAITKIND_IGNORE
;
5411 return minus_one_ptid
;
5414 /* Otherwise do a blocking wait. */
5415 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
5420 /* Wait until the remote machine stops, then return, storing status in
5421 STATUS just as `wait' would. */
5424 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
5426 struct remote_state
*rs
= get_remote_state ();
5427 ptid_t event_ptid
= null_ptid
;
5429 struct stop_reply
*stop_reply
;
5433 status
->kind
= TARGET_WAITKIND_IGNORE
;
5434 status
->value
.integer
= 0;
5436 stop_reply
= queued_stop_reply (ptid
);
5437 if (stop_reply
!= NULL
)
5438 return process_stop_reply (stop_reply
, status
);
5440 if (rs
->cached_wait_status
)
5441 /* Use the cached wait status, but only once. */
5442 rs
->cached_wait_status
= 0;
5447 if (!target_is_async_p ())
5449 ofunc
= signal (SIGINT
, remote_interrupt
);
5450 /* If the user hit C-c before this packet, or between packets,
5451 pretend that it was hit right here. */
5455 remote_interrupt (SIGINT
);
5459 /* FIXME: cagney/1999-09-27: If we're in async mode we should
5460 _never_ wait for ever -> test on target_is_async_p().
5461 However, before we do that we need to ensure that the caller
5462 knows how to take the target into/out of async mode. */
5463 ret
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, wait_forever_enabled_p
);
5464 if (!target_is_async_p ())
5465 signal (SIGINT
, ofunc
);
5470 remote_stopped_by_watchpoint_p
= 0;
5472 /* We got something. */
5473 rs
->waiting_for_stop_reply
= 0;
5475 /* Assume that the target has acknowledged Ctrl-C unless we receive
5476 an 'F' or 'O' packet. */
5477 if (buf
[0] != 'F' && buf
[0] != 'O')
5478 rs
->ctrlc_pending_p
= 0;
5482 case 'E': /* Error of some sort. */
5483 /* We're out of sync with the target now. Did it continue or
5484 not? Not is more likely, so report a stop. */
5485 warning (_("Remote failure reply: %s"), buf
);
5486 status
->kind
= TARGET_WAITKIND_STOPPED
;
5487 status
->value
.sig
= TARGET_SIGNAL_0
;
5489 case 'F': /* File-I/O request. */
5490 remote_fileio_request (buf
, rs
->ctrlc_pending_p
);
5491 rs
->ctrlc_pending_p
= 0;
5493 case 'T': case 'S': case 'X': case 'W':
5495 struct stop_reply
*stop_reply
;
5496 struct cleanup
*old_chain
;
5498 stop_reply
= stop_reply_xmalloc ();
5499 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
5500 remote_parse_stop_reply (buf
, stop_reply
);
5501 discard_cleanups (old_chain
);
5502 event_ptid
= process_stop_reply (stop_reply
, status
);
5505 case 'O': /* Console output. */
5506 remote_console_output (buf
+ 1);
5508 /* The target didn't really stop; keep waiting. */
5509 rs
->waiting_for_stop_reply
= 1;
5513 if (last_sent_signal
!= TARGET_SIGNAL_0
)
5515 /* Zero length reply means that we tried 'S' or 'C' and the
5516 remote system doesn't support it. */
5517 target_terminal_ours_for_output ();
5519 ("Can't send signals to this remote system. %s not sent.\n",
5520 target_signal_to_name (last_sent_signal
));
5521 last_sent_signal
= TARGET_SIGNAL_0
;
5522 target_terminal_inferior ();
5524 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
5525 putpkt ((char *) buf
);
5527 /* We just told the target to resume, so a stop reply is in
5529 rs
->waiting_for_stop_reply
= 1;
5532 /* else fallthrough */
5534 warning (_("Invalid remote reply: %s"), buf
);
5536 rs
->waiting_for_stop_reply
= 1;
5540 if (status
->kind
== TARGET_WAITKIND_IGNORE
)
5542 /* Nothing interesting happened. If we're doing a non-blocking
5543 poll, we're done. Otherwise, go back to waiting. */
5544 if (options
& TARGET_WNOHANG
)
5545 return minus_one_ptid
;
5549 else if (status
->kind
!= TARGET_WAITKIND_EXITED
5550 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
5552 if (!ptid_equal (event_ptid
, null_ptid
))
5553 record_currthread (event_ptid
);
5555 event_ptid
= inferior_ptid
;
5558 /* A process exit. Invalidate our notion of current thread. */
5559 record_currthread (minus_one_ptid
);
5564 /* Wait until the remote machine stops, then return, storing status in
5565 STATUS just as `wait' would. */
5568 remote_wait (struct target_ops
*ops
,
5569 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
5574 event_ptid
= remote_wait_ns (ptid
, status
, options
);
5576 event_ptid
= remote_wait_as (ptid
, status
, options
);
5578 if (target_can_async_p ())
5580 /* If there are are events left in the queue tell the event loop
5582 if (stop_reply_queue
)
5583 mark_async_event_handler (remote_async_inferior_event_token
);
5589 /* Fetch a single register using a 'p' packet. */
5592 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
5594 struct remote_state
*rs
= get_remote_state ();
5596 char regp
[MAX_REGISTER_SIZE
];
5599 if (remote_protocol_packets
[PACKET_p
].support
== PACKET_DISABLE
)
5602 if (reg
->pnum
== -1)
5607 p
+= hexnumstr (p
, reg
->pnum
);
5610 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5614 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
5618 case PACKET_UNKNOWN
:
5621 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
5622 gdbarch_register_name (get_regcache_arch (regcache
),
5627 /* If this register is unfetchable, tell the regcache. */
5630 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
5634 /* Otherwise, parse and supply the value. */
5640 error (_("fetch_register_using_p: early buf termination"));
5642 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
5645 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
5649 /* Fetch the registers included in the target's 'g' packet. */
5652 send_g_packet (void)
5654 struct remote_state
*rs
= get_remote_state ();
5657 sprintf (rs
->buf
, "g");
5658 remote_send (&rs
->buf
, &rs
->buf_size
);
5660 /* We can get out of synch in various cases. If the first character
5661 in the buffer is not a hex character, assume that has happened
5662 and try to fetch another packet to read. */
5663 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
5664 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
5665 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
5666 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
5669 fprintf_unfiltered (gdb_stdlog
,
5670 "Bad register packet; fetching a new packet\n");
5671 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5674 buf_len
= strlen (rs
->buf
);
5676 /* Sanity check the received packet. */
5677 if (buf_len
% 2 != 0)
5678 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
5684 process_g_packet (struct regcache
*regcache
)
5686 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
5687 struct remote_state
*rs
= get_remote_state ();
5688 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5693 buf_len
= strlen (rs
->buf
);
5695 /* Further sanity checks, with knowledge of the architecture. */
5696 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
5697 error (_("Remote 'g' packet reply is too long: %s"), rs
->buf
);
5699 /* Save the size of the packet sent to us by the target. It is used
5700 as a heuristic when determining the max size of packets that the
5701 target can safely receive. */
5702 if (rsa
->actual_register_packet_size
== 0)
5703 rsa
->actual_register_packet_size
= buf_len
;
5705 /* If this is smaller than we guessed the 'g' packet would be,
5706 update our records. A 'g' reply that doesn't include a register's
5707 value implies either that the register is not available, or that
5708 the 'p' packet must be used. */
5709 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
5711 rsa
->sizeof_g_packet
= buf_len
/ 2;
5713 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
5715 if (rsa
->regs
[i
].pnum
== -1)
5718 if (rsa
->regs
[i
].offset
>= rsa
->sizeof_g_packet
)
5719 rsa
->regs
[i
].in_g_packet
= 0;
5721 rsa
->regs
[i
].in_g_packet
= 1;
5725 regs
= alloca (rsa
->sizeof_g_packet
);
5727 /* Unimplemented registers read as all bits zero. */
5728 memset (regs
, 0, rsa
->sizeof_g_packet
);
5730 /* Reply describes registers byte by byte, each byte encoded as two
5731 hex characters. Suck them all up, then supply them to the
5732 register cacheing/storage mechanism. */
5735 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
5737 if (p
[0] == 0 || p
[1] == 0)
5738 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
5739 internal_error (__FILE__
, __LINE__
,
5740 _("unexpected end of 'g' packet reply"));
5742 if (p
[0] == 'x' && p
[1] == 'x')
5743 regs
[i
] = 0; /* 'x' */
5745 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
5749 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
5751 struct packet_reg
*r
= &rsa
->regs
[i
];
5755 if (r
->offset
* 2 >= strlen (rs
->buf
))
5756 /* This shouldn't happen - we adjusted in_g_packet above. */
5757 internal_error (__FILE__
, __LINE__
,
5758 _("unexpected end of 'g' packet reply"));
5759 else if (rs
->buf
[r
->offset
* 2] == 'x')
5761 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
5762 /* The register isn't available, mark it as such (at
5763 the same time setting the value to zero). */
5764 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
5767 regcache_raw_supply (regcache
, r
->regnum
,
5774 fetch_registers_using_g (struct regcache
*regcache
)
5777 process_g_packet (regcache
);
5780 /* Make the remote selected traceframe match GDB's selected
5784 set_remote_traceframe (void)
5788 if (remote_traceframe_number
== get_traceframe_number ())
5791 /* Avoid recursion, remote_trace_find calls us again. */
5792 remote_traceframe_number
= get_traceframe_number ();
5794 newnum
= target_trace_find (tfind_number
,
5795 get_traceframe_number (), 0, 0, NULL
);
5797 /* Should not happen. If it does, all bets are off. */
5798 if (newnum
!= get_traceframe_number ())
5799 warning (_("could not set remote traceframe"));
5803 remote_fetch_registers (struct target_ops
*ops
,
5804 struct regcache
*regcache
, int regnum
)
5806 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5809 set_remote_traceframe ();
5810 set_general_thread (inferior_ptid
);
5814 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5816 gdb_assert (reg
!= NULL
);
5818 /* If this register might be in the 'g' packet, try that first -
5819 we are likely to read more than one register. If this is the
5820 first 'g' packet, we might be overly optimistic about its
5821 contents, so fall back to 'p'. */
5822 if (reg
->in_g_packet
)
5824 fetch_registers_using_g (regcache
);
5825 if (reg
->in_g_packet
)
5829 if (fetch_register_using_p (regcache
, reg
))
5832 /* This register is not available. */
5833 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
5838 fetch_registers_using_g (regcache
);
5840 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5841 if (!rsa
->regs
[i
].in_g_packet
)
5842 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
5844 /* This register is not available. */
5845 regcache_raw_supply (regcache
, i
, NULL
);
5849 /* Prepare to store registers. Since we may send them all (using a
5850 'G' request), we have to read out the ones we don't want to change
5854 remote_prepare_to_store (struct regcache
*regcache
)
5856 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5858 gdb_byte buf
[MAX_REGISTER_SIZE
];
5860 /* Make sure the entire registers array is valid. */
5861 switch (remote_protocol_packets
[PACKET_P
].support
)
5863 case PACKET_DISABLE
:
5864 case PACKET_SUPPORT_UNKNOWN
:
5865 /* Make sure all the necessary registers are cached. */
5866 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5867 if (rsa
->regs
[i
].in_g_packet
)
5868 regcache_raw_read (regcache
, rsa
->regs
[i
].regnum
, buf
);
5875 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
5876 packet was not recognized. */
5879 store_register_using_P (const struct regcache
*regcache
,
5880 struct packet_reg
*reg
)
5882 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
5883 struct remote_state
*rs
= get_remote_state ();
5884 /* Try storing a single register. */
5885 char *buf
= rs
->buf
;
5886 gdb_byte regp
[MAX_REGISTER_SIZE
];
5889 if (remote_protocol_packets
[PACKET_P
].support
== PACKET_DISABLE
)
5892 if (reg
->pnum
== -1)
5895 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
5896 p
= buf
+ strlen (buf
);
5897 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
5898 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
5900 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5902 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
5907 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
5908 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
5909 case PACKET_UNKNOWN
:
5912 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
5916 /* Store register REGNUM, or all registers if REGNUM == -1, from the
5917 contents of the register cache buffer. FIXME: ignores errors. */
5920 store_registers_using_G (const struct regcache
*regcache
)
5922 struct remote_state
*rs
= get_remote_state ();
5923 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5927 /* Extract all the registers in the regcache copying them into a
5932 regs
= alloca (rsa
->sizeof_g_packet
);
5933 memset (regs
, 0, rsa
->sizeof_g_packet
);
5934 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5936 struct packet_reg
*r
= &rsa
->regs
[i
];
5939 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
5943 /* Command describes registers byte by byte,
5944 each byte encoded as two hex characters. */
5947 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
5949 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
5951 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5952 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
5953 error (_("Could not write registers; remote failure reply '%s'"),
5957 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
5958 of the register cache buffer. FIXME: ignores errors. */
5961 remote_store_registers (struct target_ops
*ops
,
5962 struct regcache
*regcache
, int regnum
)
5964 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5967 set_remote_traceframe ();
5968 set_general_thread (inferior_ptid
);
5972 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5974 gdb_assert (reg
!= NULL
);
5976 /* Always prefer to store registers using the 'P' packet if
5977 possible; we often change only a small number of registers.
5978 Sometimes we change a larger number; we'd need help from a
5979 higher layer to know to use 'G'. */
5980 if (store_register_using_P (regcache
, reg
))
5983 /* For now, don't complain if we have no way to write the
5984 register. GDB loses track of unavailable registers too
5985 easily. Some day, this may be an error. We don't have
5986 any way to read the register, either... */
5987 if (!reg
->in_g_packet
)
5990 store_registers_using_G (regcache
);
5994 store_registers_using_G (regcache
);
5996 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5997 if (!rsa
->regs
[i
].in_g_packet
)
5998 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
5999 /* See above for why we do not issue an error here. */
6004 /* Return the number of hex digits in num. */
6007 hexnumlen (ULONGEST num
)
6011 for (i
= 0; num
!= 0; i
++)
6017 /* Set BUF to the minimum number of hex digits representing NUM. */
6020 hexnumstr (char *buf
, ULONGEST num
)
6022 int len
= hexnumlen (num
);
6024 return hexnumnstr (buf
, num
, len
);
6028 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
6031 hexnumnstr (char *buf
, ULONGEST num
, int width
)
6037 for (i
= width
- 1; i
>= 0; i
--)
6039 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
6046 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
6049 remote_address_masked (CORE_ADDR addr
)
6051 int address_size
= remote_address_size
;
6053 /* If "remoteaddresssize" was not set, default to target address size. */
6055 address_size
= gdbarch_addr_bit (target_gdbarch
);
6057 if (address_size
> 0
6058 && address_size
< (sizeof (ULONGEST
) * 8))
6060 /* Only create a mask when that mask can safely be constructed
6061 in a ULONGEST variable. */
6064 mask
= (mask
<< address_size
) - 1;
6070 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
6071 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
6072 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
6073 (which may be more than *OUT_LEN due to escape characters). The
6074 total number of bytes in the output buffer will be at most
6078 remote_escape_output (const gdb_byte
*buffer
, int len
,
6079 gdb_byte
*out_buf
, int *out_len
,
6082 int input_index
, output_index
;
6085 for (input_index
= 0; input_index
< len
; input_index
++)
6087 gdb_byte b
= buffer
[input_index
];
6089 if (b
== '$' || b
== '#' || b
== '}')
6091 /* These must be escaped. */
6092 if (output_index
+ 2 > out_maxlen
)
6094 out_buf
[output_index
++] = '}';
6095 out_buf
[output_index
++] = b
^ 0x20;
6099 if (output_index
+ 1 > out_maxlen
)
6101 out_buf
[output_index
++] = b
;
6105 *out_len
= input_index
;
6106 return output_index
;
6109 /* Convert BUFFER, escaped data LEN bytes long, into binary data
6110 in OUT_BUF. Return the number of bytes written to OUT_BUF.
6111 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
6113 This function reverses remote_escape_output. It allows more
6114 escaped characters than that function does, in particular because
6115 '*' must be escaped to avoid the run-length encoding processing
6116 in reading packets. */
6119 remote_unescape_input (const gdb_byte
*buffer
, int len
,
6120 gdb_byte
*out_buf
, int out_maxlen
)
6122 int input_index
, output_index
;
6127 for (input_index
= 0; input_index
< len
; input_index
++)
6129 gdb_byte b
= buffer
[input_index
];
6131 if (output_index
+ 1 > out_maxlen
)
6133 warning (_("Received too much data from remote target;"
6134 " ignoring overflow."));
6135 return output_index
;
6140 out_buf
[output_index
++] = b
^ 0x20;
6146 out_buf
[output_index
++] = b
;
6150 error (_("Unmatched escape character in target response."));
6152 return output_index
;
6155 /* Determine whether the remote target supports binary downloading.
6156 This is accomplished by sending a no-op memory write of zero length
6157 to the target at the specified address. It does not suffice to send
6158 the whole packet, since many stubs strip the eighth bit and
6159 subsequently compute a wrong checksum, which causes real havoc with
6162 NOTE: This can still lose if the serial line is not eight-bit
6163 clean. In cases like this, the user should clear "remote
6167 check_binary_download (CORE_ADDR addr
)
6169 struct remote_state
*rs
= get_remote_state ();
6171 switch (remote_protocol_packets
[PACKET_X
].support
)
6173 case PACKET_DISABLE
:
6177 case PACKET_SUPPORT_UNKNOWN
:
6183 p
+= hexnumstr (p
, (ULONGEST
) addr
);
6185 p
+= hexnumstr (p
, (ULONGEST
) 0);
6189 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
6190 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6192 if (rs
->buf
[0] == '\0')
6195 fprintf_unfiltered (gdb_stdlog
,
6196 "binary downloading NOT "
6197 "supported by target\n");
6198 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
6203 fprintf_unfiltered (gdb_stdlog
,
6204 "binary downloading suppported by target\n");
6205 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
6212 /* Write memory data directly to the remote machine.
6213 This does not inform the data cache; the data cache uses this.
6214 HEADER is the starting part of the packet.
6215 MEMADDR is the address in the remote memory space.
6216 MYADDR is the address of the buffer in our space.
6217 LEN is the number of bytes.
6218 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
6219 should send data as binary ('X'), or hex-encoded ('M').
6221 The function creates packet of the form
6222 <HEADER><ADDRESS>,<LENGTH>:<DATA>
6224 where encoding of <DATA> is termined by PACKET_FORMAT.
6226 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
6229 Returns the number of bytes transferred, or 0 (setting errno) for
6230 error. Only transfer a single packet. */
6233 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
6234 const gdb_byte
*myaddr
, int len
,
6235 char packet_format
, int use_length
)
6237 struct remote_state
*rs
= get_remote_state ();
6247 if (packet_format
!= 'X' && packet_format
!= 'M')
6248 internal_error (__FILE__
, __LINE__
,
6249 _("remote_write_bytes_aux: bad packet format"));
6254 payload_size
= get_memory_write_packet_size ();
6256 /* The packet buffer will be large enough for the payload;
6257 get_memory_packet_size ensures this. */
6260 /* Compute the size of the actual payload by subtracting out the
6261 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
6263 payload_size
-= strlen ("$,:#NN");
6265 /* The comma won't be used. */
6267 header_length
= strlen (header
);
6268 payload_size
-= header_length
;
6269 payload_size
-= hexnumlen (memaddr
);
6271 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
6273 strcat (rs
->buf
, header
);
6274 p
= rs
->buf
+ strlen (header
);
6276 /* Compute a best guess of the number of bytes actually transfered. */
6277 if (packet_format
== 'X')
6279 /* Best guess at number of bytes that will fit. */
6280 todo
= min (len
, payload_size
);
6282 payload_size
-= hexnumlen (todo
);
6283 todo
= min (todo
, payload_size
);
6287 /* Num bytes that will fit. */
6288 todo
= min (len
, payload_size
/ 2);
6290 payload_size
-= hexnumlen (todo
);
6291 todo
= min (todo
, payload_size
/ 2);
6295 internal_error (__FILE__
, __LINE__
,
6296 _("minumum packet size too small to write data"));
6298 /* If we already need another packet, then try to align the end
6299 of this packet to a useful boundary. */
6300 if (todo
> 2 * REMOTE_ALIGN_WRITES
&& todo
< len
)
6301 todo
= ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
6303 /* Append "<memaddr>". */
6304 memaddr
= remote_address_masked (memaddr
);
6305 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
6312 /* Append <len>. Retain the location/size of <len>. It may need to
6313 be adjusted once the packet body has been created. */
6315 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
6323 /* Append the packet body. */
6324 if (packet_format
== 'X')
6326 /* Binary mode. Send target system values byte by byte, in
6327 increasing byte addresses. Only escape certain critical
6329 payload_length
= remote_escape_output (myaddr
, todo
, p
, &nr_bytes
,
6332 /* If not all TODO bytes fit, then we'll need another packet. Make
6333 a second try to keep the end of the packet aligned. Don't do
6334 this if the packet is tiny. */
6335 if (nr_bytes
< todo
&& nr_bytes
> 2 * REMOTE_ALIGN_WRITES
)
6339 new_nr_bytes
= (((memaddr
+ nr_bytes
) & ~(REMOTE_ALIGN_WRITES
- 1))
6341 if (new_nr_bytes
!= nr_bytes
)
6342 payload_length
= remote_escape_output (myaddr
, new_nr_bytes
,
6347 p
+= payload_length
;
6348 if (use_length
&& nr_bytes
< todo
)
6350 /* Escape chars have filled up the buffer prematurely,
6351 and we have actually sent fewer bytes than planned.
6352 Fix-up the length field of the packet. Use the same
6353 number of characters as before. */
6354 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
6355 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
6360 /* Normal mode: Send target system values byte by byte, in
6361 increasing byte addresses. Each byte is encoded as a two hex
6363 nr_bytes
= bin2hex (myaddr
, p
, todo
);
6367 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
6368 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6370 if (rs
->buf
[0] == 'E')
6372 /* There is no correspondance between what the remote protocol
6373 uses for errors and errno codes. We would like a cleaner way
6374 of representing errors (big enough to include errno codes,
6375 bfd_error codes, and others). But for now just return EIO. */
6380 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
6381 fewer bytes than we'd planned. */
6385 /* Write memory data directly to the remote machine.
6386 This does not inform the data cache; the data cache uses this.
6387 MEMADDR is the address in the remote memory space.
6388 MYADDR is the address of the buffer in our space.
6389 LEN is the number of bytes.
6391 Returns number of bytes transferred, or 0 (setting errno) for
6392 error. Only transfer a single packet. */
6395 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, int len
)
6397 char *packet_format
= 0;
6399 /* Check whether the target supports binary download. */
6400 check_binary_download (memaddr
);
6402 switch (remote_protocol_packets
[PACKET_X
].support
)
6405 packet_format
= "X";
6407 case PACKET_DISABLE
:
6408 packet_format
= "M";
6410 case PACKET_SUPPORT_UNKNOWN
:
6411 internal_error (__FILE__
, __LINE__
,
6412 _("remote_write_bytes: bad internal state"));
6414 internal_error (__FILE__
, __LINE__
, _("bad switch"));
6417 return remote_write_bytes_aux (packet_format
,
6418 memaddr
, myaddr
, len
, packet_format
[0], 1);
6421 /* Read memory data directly from the remote machine.
6422 This does not use the data cache; the data cache uses this.
6423 MEMADDR is the address in the remote memory space.
6424 MYADDR is the address of the buffer in our space.
6425 LEN is the number of bytes.
6427 Returns number of bytes transferred, or 0 for error. */
6430 remote_read_bytes (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
6432 struct remote_state
*rs
= get_remote_state ();
6433 int max_buf_size
; /* Max size of packet output buffer. */
6441 max_buf_size
= get_memory_read_packet_size ();
6442 /* The packet buffer will be large enough for the payload;
6443 get_memory_packet_size ensures this. */
6445 /* Number if bytes that will fit. */
6446 todo
= min (len
, max_buf_size
/ 2);
6448 /* Construct "m"<memaddr>","<len>". */
6449 memaddr
= remote_address_masked (memaddr
);
6452 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
6454 p
+= hexnumstr (p
, (ULONGEST
) todo
);
6457 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6458 if (rs
->buf
[0] == 'E'
6459 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
6460 && rs
->buf
[3] == '\0')
6462 /* There is no correspondance between what the remote protocol
6463 uses for errors and errno codes. We would like a cleaner way
6464 of representing errors (big enough to include errno codes,
6465 bfd_error codes, and others). But for now just return
6470 /* Reply describes memory byte by byte, each byte encoded as two hex
6473 i
= hex2bin (p
, myaddr
, todo
);
6474 /* Return what we have. Let higher layers handle partial reads. */
6479 /* Remote notification handler. */
6482 handle_notification (char *buf
, size_t length
)
6484 if (strncmp (buf
, "Stop:", 5) == 0)
6486 if (pending_stop_reply
)
6488 /* We've already parsed the in-flight stop-reply, but the
6489 stub for some reason thought we didn't, possibly due to
6490 timeout on its side. Just ignore it. */
6492 fprintf_unfiltered (gdb_stdlog
, "ignoring resent notification\n");
6496 struct cleanup
*old_chain
;
6497 struct stop_reply
*reply
= stop_reply_xmalloc ();
6499 old_chain
= make_cleanup (do_stop_reply_xfree
, reply
);
6501 remote_parse_stop_reply (buf
+ 5, reply
);
6503 discard_cleanups (old_chain
);
6505 /* Be careful to only set it after parsing, since an error
6506 may be thrown then. */
6507 pending_stop_reply
= reply
;
6509 /* Notify the event loop there's a stop reply to acknowledge
6510 and that there may be more events to fetch. */
6511 mark_async_event_handler (remote_async_get_pending_events_token
);
6514 fprintf_unfiltered (gdb_stdlog
, "stop notification captured\n");
6518 /* We ignore notifications we don't recognize, for compatibility
6519 with newer stubs. */
6524 /* Read or write LEN bytes from inferior memory at MEMADDR,
6525 transferring to or from debugger address BUFFER. Write to inferior
6526 if SHOULD_WRITE is nonzero. Returns length of data written or
6527 read; 0 for error. TARGET is unused. */
6530 remote_xfer_memory (CORE_ADDR mem_addr
, gdb_byte
*buffer
, int mem_len
,
6531 int should_write
, struct mem_attrib
*attrib
,
6532 struct target_ops
*target
)
6536 set_remote_traceframe ();
6537 set_general_thread (inferior_ptid
);
6540 res
= remote_write_bytes (mem_addr
, buffer
, mem_len
);
6542 res
= remote_read_bytes (mem_addr
, buffer
, mem_len
);
6547 /* Sends a packet with content determined by the printf format string
6548 FORMAT and the remaining arguments, then gets the reply. Returns
6549 whether the packet was a success, a failure, or unknown. */
6551 static enum packet_result
6552 remote_send_printf (const char *format
, ...)
6554 struct remote_state
*rs
= get_remote_state ();
6555 int max_size
= get_remote_packet_size ();
6558 va_start (ap
, format
);
6561 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
6562 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
6564 if (putpkt (rs
->buf
) < 0)
6565 error (_("Communication problem with target."));
6568 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6570 return packet_check_result (rs
->buf
);
6574 restore_remote_timeout (void *p
)
6576 int value
= *(int *)p
;
6578 remote_timeout
= value
;
6581 /* Flash writing can take quite some time. We'll set
6582 effectively infinite timeout for flash operations.
6583 In future, we'll need to decide on a better approach. */
6584 static const int remote_flash_timeout
= 1000;
6587 remote_flash_erase (struct target_ops
*ops
,
6588 ULONGEST address
, LONGEST length
)
6590 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
6591 int saved_remote_timeout
= remote_timeout
;
6592 enum packet_result ret
;
6593 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
6594 &saved_remote_timeout
);
6596 remote_timeout
= remote_flash_timeout
;
6598 ret
= remote_send_printf ("vFlashErase:%s,%s",
6599 phex (address
, addr_size
),
6603 case PACKET_UNKNOWN
:
6604 error (_("Remote target does not support flash erase"));
6606 error (_("Error erasing flash with vFlashErase packet"));
6611 do_cleanups (back_to
);
6615 remote_flash_write (struct target_ops
*ops
,
6616 ULONGEST address
, LONGEST length
,
6617 const gdb_byte
*data
)
6619 int saved_remote_timeout
= remote_timeout
;
6621 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
6622 &saved_remote_timeout
);
6624 remote_timeout
= remote_flash_timeout
;
6625 ret
= remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 'X', 0);
6626 do_cleanups (back_to
);
6632 remote_flash_done (struct target_ops
*ops
)
6634 int saved_remote_timeout
= remote_timeout
;
6636 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
6637 &saved_remote_timeout
);
6639 remote_timeout
= remote_flash_timeout
;
6640 ret
= remote_send_printf ("vFlashDone");
6641 do_cleanups (back_to
);
6645 case PACKET_UNKNOWN
:
6646 error (_("Remote target does not support vFlashDone"));
6648 error (_("Error finishing flash operation"));
6655 remote_files_info (struct target_ops
*ignore
)
6657 puts_filtered ("Debugging a target over a serial line.\n");
6660 /* Stuff for dealing with the packets which are part of this protocol.
6661 See comment at top of file for details. */
6663 /* Read a single character from the remote end. */
6666 readchar (int timeout
)
6670 ch
= serial_readchar (remote_desc
, timeout
);
6675 switch ((enum serial_rc
) ch
)
6679 error (_("Remote connection closed"));
6683 perror_with_name (_("Remote communication error. "
6684 "Target disconnected."));
6686 case SERIAL_TIMEOUT
:
6692 /* Send the command in *BUF to the remote machine, and read the reply
6693 into *BUF. Report an error if we get an error reply. Resize
6694 *BUF using xrealloc if necessary to hold the result, and update
6698 remote_send (char **buf
,
6702 getpkt (buf
, sizeof_buf
, 0);
6704 if ((*buf
)[0] == 'E')
6705 error (_("Remote failure reply: %s"), *buf
);
6708 /* Return a pointer to an xmalloc'ed string representing an escaped
6709 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
6710 etc. The caller is responsible for releasing the returned
6714 escape_buffer (const char *buf
, int n
)
6716 struct cleanup
*old_chain
;
6717 struct ui_file
*stb
;
6720 stb
= mem_fileopen ();
6721 old_chain
= make_cleanup_ui_file_delete (stb
);
6723 fputstrn_unfiltered (buf
, n
, 0, stb
);
6724 str
= ui_file_xstrdup (stb
, NULL
);
6725 do_cleanups (old_chain
);
6729 /* Display a null-terminated packet on stdout, for debugging, using C
6733 print_packet (char *buf
)
6735 puts_filtered ("\"");
6736 fputstr_filtered (buf
, '"', gdb_stdout
);
6737 puts_filtered ("\"");
6743 return putpkt_binary (buf
, strlen (buf
));
6746 /* Send a packet to the remote machine, with error checking. The data
6747 of the packet is in BUF. The string in BUF can be at most
6748 get_remote_packet_size () - 5 to account for the $, # and checksum,
6749 and for a possible /0 if we are debugging (remote_debug) and want
6750 to print the sent packet as a string. */
6753 putpkt_binary (char *buf
, int cnt
)
6755 struct remote_state
*rs
= get_remote_state ();
6757 unsigned char csum
= 0;
6758 char *buf2
= alloca (cnt
+ 6);
6764 /* Catch cases like trying to read memory or listing threads while
6765 we're waiting for a stop reply. The remote server wouldn't be
6766 ready to handle this request, so we'd hang and timeout. We don't
6767 have to worry about this in synchronous mode, because in that
6768 case it's not possible to issue a command while the target is
6769 running. This is not a problem in non-stop mode, because in that
6770 case, the stub is always ready to process serial input. */
6771 if (!non_stop
&& target_can_async_p () && rs
->waiting_for_stop_reply
)
6772 error (_("Cannot execute this command while the target is running."));
6774 /* We're sending out a new packet. Make sure we don't look at a
6775 stale cached response. */
6776 rs
->cached_wait_status
= 0;
6778 /* Copy the packet into buffer BUF2, encapsulating it
6779 and giving it a checksum. */
6784 for (i
= 0; i
< cnt
; i
++)
6790 *p
++ = tohex ((csum
>> 4) & 0xf);
6791 *p
++ = tohex (csum
& 0xf);
6793 /* Send it over and over until we get a positive ack. */
6797 int started_error_output
= 0;
6801 struct cleanup
*old_chain
;
6805 str
= escape_buffer (buf2
, p
- buf2
);
6806 old_chain
= make_cleanup (xfree
, str
);
6807 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s...", str
);
6808 gdb_flush (gdb_stdlog
);
6809 do_cleanups (old_chain
);
6811 if (serial_write (remote_desc
, buf2
, p
- buf2
))
6812 perror_with_name (_("putpkt: write failed"));
6814 /* If this is a no acks version of the remote protocol, send the
6815 packet and move on. */
6819 /* Read until either a timeout occurs (-2) or '+' is read.
6820 Handle any notification that arrives in the mean time. */
6823 ch
= readchar (remote_timeout
);
6831 case SERIAL_TIMEOUT
:
6834 if (started_error_output
)
6836 putchar_unfiltered ('\n');
6837 started_error_output
= 0;
6846 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
6850 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
6852 case SERIAL_TIMEOUT
:
6856 break; /* Retransmit buffer. */
6860 fprintf_unfiltered (gdb_stdlog
,
6861 "Packet instead of Ack, ignoring it\n");
6862 /* It's probably an old response sent because an ACK
6863 was lost. Gobble up the packet and ack it so it
6864 doesn't get retransmitted when we resend this
6867 serial_write (remote_desc
, "+", 1);
6868 continue; /* Now, go look for +. */
6875 /* If we got a notification, handle it, and go back to looking
6877 /* We've found the start of a notification. Now
6878 collect the data. */
6879 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
6884 struct cleanup
*old_chain
;
6887 str
= escape_buffer (rs
->buf
, val
);
6888 old_chain
= make_cleanup (xfree
, str
);
6889 fprintf_unfiltered (gdb_stdlog
,
6890 " Notification received: %s\n",
6892 do_cleanups (old_chain
);
6894 handle_notification (rs
->buf
, val
);
6895 /* We're in sync now, rewait for the ack. */
6902 if (!started_error_output
)
6904 started_error_output
= 1;
6905 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6907 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6908 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
6917 if (!started_error_output
)
6919 started_error_output
= 1;
6920 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6922 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6926 break; /* Here to retransmit. */
6930 /* This is wrong. If doing a long backtrace, the user should be
6931 able to get out next time we call QUIT, without anything as
6932 violent as interrupt_query. If we want to provide a way out of
6933 here without getting to the next QUIT, it should be based on
6934 hitting ^C twice as in remote_wait. */
6945 /* Come here after finding the start of a frame when we expected an
6946 ack. Do our best to discard the rest of this packet. */
6955 c
= readchar (remote_timeout
);
6958 case SERIAL_TIMEOUT
:
6959 /* Nothing we can do. */
6962 /* Discard the two bytes of checksum and stop. */
6963 c
= readchar (remote_timeout
);
6965 c
= readchar (remote_timeout
);
6968 case '*': /* Run length encoding. */
6969 /* Discard the repeat count. */
6970 c
= readchar (remote_timeout
);
6975 /* A regular character. */
6981 /* Come here after finding the start of the frame. Collect the rest
6982 into *BUF, verifying the checksum, length, and handling run-length
6983 compression. NUL terminate the buffer. If there is not enough room,
6984 expand *BUF using xrealloc.
6986 Returns -1 on error, number of characters in buffer (ignoring the
6987 trailing NULL) on success. (could be extended to return one of the
6988 SERIAL status indications). */
6991 read_frame (char **buf_p
,
6998 struct remote_state
*rs
= get_remote_state ();
7005 c
= readchar (remote_timeout
);
7008 case SERIAL_TIMEOUT
:
7010 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
7014 fputs_filtered ("Saw new packet start in middle of old one\n",
7016 return -1; /* Start a new packet, count retries. */
7019 unsigned char pktcsum
;
7025 check_0
= readchar (remote_timeout
);
7027 check_1
= readchar (remote_timeout
);
7029 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
7032 fputs_filtered ("Timeout in checksum, retrying\n",
7036 else if (check_0
< 0 || check_1
< 0)
7039 fputs_filtered ("Communication error in checksum\n",
7044 /* Don't recompute the checksum; with no ack packets we
7045 don't have any way to indicate a packet retransmission
7050 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
7051 if (csum
== pktcsum
)
7056 struct cleanup
*old_chain
;
7059 str
= escape_buffer (buf
, bc
);
7060 old_chain
= make_cleanup (xfree
, str
);
7061 fprintf_unfiltered (gdb_stdlog
,
7062 "Bad checksum, sentsum=0x%x, "
7063 "csum=0x%x, buf=%s\n",
7064 pktcsum
, csum
, str
);
7065 do_cleanups (old_chain
);
7067 /* Number of characters in buffer ignoring trailing
7071 case '*': /* Run length encoding. */
7076 c
= readchar (remote_timeout
);
7078 repeat
= c
- ' ' + 3; /* Compute repeat count. */
7080 /* The character before ``*'' is repeated. */
7082 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
7084 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
7086 /* Make some more room in the buffer. */
7087 *sizeof_buf
+= repeat
;
7088 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
7092 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
7098 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
7102 if (bc
>= *sizeof_buf
- 1)
7104 /* Make some more room in the buffer. */
7106 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
7117 /* Read a packet from the remote machine, with error checking, and
7118 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
7119 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
7120 rather than timing out; this is used (in synchronous mode) to wait
7121 for a target that is is executing user code to stop. */
7122 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
7123 don't have to change all the calls to getpkt to deal with the
7124 return value, because at the moment I don't know what the right
7125 thing to do it for those. */
7133 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
7137 /* Read a packet from the remote machine, with error checking, and
7138 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
7139 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
7140 rather than timing out; this is used (in synchronous mode) to wait
7141 for a target that is is executing user code to stop. If FOREVER ==
7142 0, this function is allowed to time out gracefully and return an
7143 indication of this to the caller. Otherwise return the number of
7144 bytes read. If EXPECTING_NOTIF, consider receiving a notification
7145 enough reason to return to the caller. */
7148 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
7149 int expecting_notif
)
7151 struct remote_state
*rs
= get_remote_state ();
7157 /* We're reading a new response. Make sure we don't look at a
7158 previously cached response. */
7159 rs
->cached_wait_status
= 0;
7161 strcpy (*buf
, "timeout");
7164 timeout
= watchdog
> 0 ? watchdog
: -1;
7165 else if (expecting_notif
)
7166 timeout
= 0; /* There should already be a char in the buffer. If
7169 timeout
= remote_timeout
;
7173 /* Process any number of notifications, and then return when
7177 /* If we get a timeout or bad checksm, retry up to MAX_TRIES
7179 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
7181 /* This can loop forever if the remote side sends us
7182 characters continuously, but if it pauses, we'll get
7183 SERIAL_TIMEOUT from readchar because of timeout. Then
7184 we'll count that as a retry.
7186 Note that even when forever is set, we will only wait
7187 forever prior to the start of a packet. After that, we
7188 expect characters to arrive at a brisk pace. They should
7189 show up within remote_timeout intervals. */
7191 c
= readchar (timeout
);
7192 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
7194 if (c
== SERIAL_TIMEOUT
)
7196 if (expecting_notif
)
7197 return -1; /* Don't complain, it's normal to not get
7198 anything in this case. */
7200 if (forever
) /* Watchdog went off? Kill the target. */
7204 error (_("Watchdog timeout has expired. Target detached."));
7207 fputs_filtered ("Timed out.\n", gdb_stdlog
);
7211 /* We've found the start of a packet or notification.
7212 Now collect the data. */
7213 val
= read_frame (buf
, sizeof_buf
);
7218 serial_write (remote_desc
, "-", 1);
7221 if (tries
> MAX_TRIES
)
7223 /* We have tried hard enough, and just can't receive the
7224 packet/notification. Give up. */
7225 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
7227 /* Skip the ack char if we're in no-ack mode. */
7228 if (!rs
->noack_mode
)
7229 serial_write (remote_desc
, "+", 1);
7233 /* If we got an ordinary packet, return that to our caller. */
7238 struct cleanup
*old_chain
;
7241 str
= escape_buffer (*buf
, val
);
7242 old_chain
= make_cleanup (xfree
, str
);
7243 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s\n", str
);
7244 do_cleanups (old_chain
);
7247 /* Skip the ack char if we're in no-ack mode. */
7248 if (!rs
->noack_mode
)
7249 serial_write (remote_desc
, "+", 1);
7253 /* If we got a notification, handle it, and go back to looking
7257 gdb_assert (c
== '%');
7261 struct cleanup
*old_chain
;
7264 str
= escape_buffer (*buf
, val
);
7265 old_chain
= make_cleanup (xfree
, str
);
7266 fprintf_unfiltered (gdb_stdlog
,
7267 " Notification received: %s\n",
7269 do_cleanups (old_chain
);
7272 handle_notification (*buf
, val
);
7274 /* Notifications require no acknowledgement. */
7276 if (expecting_notif
)
7283 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
7285 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0);
7289 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
)
7291 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1);
7296 remote_kill (struct target_ops
*ops
)
7298 /* Use catch_errors so the user can quit from gdb even when we
7299 aren't on speaking terms with the remote system. */
7300 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
7302 /* Don't wait for it to die. I'm not really sure it matters whether
7303 we do or not. For the existing stubs, kill is a noop. */
7304 target_mourn_inferior ();
7308 remote_vkill (int pid
, struct remote_state
*rs
)
7310 if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
7313 /* Tell the remote target to detach. */
7314 sprintf (rs
->buf
, "vKill;%x", pid
);
7316 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7318 if (packet_ok (rs
->buf
,
7319 &remote_protocol_packets
[PACKET_vKill
]) == PACKET_OK
)
7321 else if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
7328 extended_remote_kill (struct target_ops
*ops
)
7331 int pid
= ptid_get_pid (inferior_ptid
);
7332 struct remote_state
*rs
= get_remote_state ();
7334 res
= remote_vkill (pid
, rs
);
7335 if (res
== -1 && !remote_multi_process_p (rs
))
7337 /* Don't try 'k' on a multi-process aware stub -- it has no way
7338 to specify the pid. */
7342 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7343 if (rs
->buf
[0] != 'O' || rs
->buf
[0] != 'K')
7346 /* Don't wait for it to die. I'm not really sure it matters whether
7347 we do or not. For the existing stubs, kill is a noop. */
7353 error (_("Can't kill process"));
7355 target_mourn_inferior ();
7359 remote_mourn (struct target_ops
*ops
)
7361 remote_mourn_1 (ops
);
7364 /* Worker function for remote_mourn. */
7366 remote_mourn_1 (struct target_ops
*target
)
7368 unpush_target (target
);
7370 /* remote_close takes care of doing most of the clean up. */
7371 generic_mourn_inferior ();
7375 extended_remote_mourn_1 (struct target_ops
*target
)
7377 struct remote_state
*rs
= get_remote_state ();
7379 /* In case we got here due to an error, but we're going to stay
7381 rs
->waiting_for_stop_reply
= 0;
7383 /* We're no longer interested in these events. */
7384 discard_pending_stop_replies (ptid_get_pid (inferior_ptid
));
7386 /* If the current general thread belonged to the process we just
7387 detached from or has exited, the remote side current general
7388 thread becomes undefined. Considering a case like this:
7390 - We just got here due to a detach.
7391 - The process that we're detaching from happens to immediately
7392 report a global breakpoint being hit in non-stop mode, in the
7393 same thread we had selected before.
7394 - GDB attaches to this process again.
7395 - This event happens to be the next event we handle.
7397 GDB would consider that the current general thread didn't need to
7398 be set on the stub side (with Hg), since for all it knew,
7399 GENERAL_THREAD hadn't changed.
7401 Notice that although in all-stop mode, the remote server always
7402 sets the current thread to the thread reporting the stop event,
7403 that doesn't happen in non-stop mode; in non-stop, the stub *must
7404 not* change the current thread when reporting a breakpoint hit,
7405 due to the decoupling of event reporting and event handling.
7407 To keep things simple, we always invalidate our notion of the
7409 record_currthread (minus_one_ptid
);
7411 /* Unlike "target remote", we do not want to unpush the target; then
7412 the next time the user says "run", we won't be connected. */
7414 /* Call common code to mark the inferior as not running. */
7415 generic_mourn_inferior ();
7417 if (!have_inferiors ())
7419 if (!remote_multi_process_p (rs
))
7421 /* Check whether the target is running now - some remote stubs
7422 automatically restart after kill. */
7424 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7426 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
7428 /* Assume that the target has been restarted. Set
7429 inferior_ptid so that bits of core GDB realizes
7430 there's something here, e.g., so that the user can
7431 say "kill" again. */
7432 inferior_ptid
= magic_null_ptid
;
7439 extended_remote_mourn (struct target_ops
*ops
)
7441 extended_remote_mourn_1 (ops
);
7445 extended_remote_run (char *args
)
7447 struct remote_state
*rs
= get_remote_state ();
7450 /* If the user has disabled vRun support, or we have detected that
7451 support is not available, do not try it. */
7452 if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
7455 strcpy (rs
->buf
, "vRun;");
7456 len
= strlen (rs
->buf
);
7458 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
7459 error (_("Remote file name too long for run packet"));
7460 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
, 0);
7462 gdb_assert (args
!= NULL
);
7465 struct cleanup
*back_to
;
7469 argv
= gdb_buildargv (args
);
7470 back_to
= make_cleanup ((void (*) (void *)) freeargv
, argv
);
7471 for (i
= 0; argv
[i
] != NULL
; i
++)
7473 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
7474 error (_("Argument list too long for run packet"));
7475 rs
->buf
[len
++] = ';';
7476 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
, 0);
7478 do_cleanups (back_to
);
7481 rs
->buf
[len
++] = '\0';
7484 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7486 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]) == PACKET_OK
)
7488 /* We have a wait response; we don't need it, though. All is well. */
7491 else if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
7492 /* It wasn't disabled before, but it is now. */
7496 if (remote_exec_file
[0] == '\0')
7497 error (_("Running the default executable on the remote target failed; "
7498 "try \"set remote exec-file\"?"));
7500 error (_("Running \"%s\" on the remote target failed"),
7505 /* In the extended protocol we want to be able to do things like
7506 "run" and have them basically work as expected. So we need
7507 a special create_inferior function. We support changing the
7508 executable file and the command line arguments, but not the
7512 extended_remote_create_inferior_1 (char *exec_file
, char *args
,
7513 char **env
, int from_tty
)
7515 /* If running asynchronously, register the target file descriptor
7516 with the event loop. */
7517 if (target_can_async_p ())
7518 target_async (inferior_event_handler
, 0);
7520 /* Now restart the remote server. */
7521 if (extended_remote_run (args
) == -1)
7523 /* vRun was not supported. Fail if we need it to do what the
7525 if (remote_exec_file
[0])
7526 error (_("Remote target does not support \"set remote exec-file\""));
7528 error (_("Remote target does not support \"set args\" or run <ARGS>"));
7530 /* Fall back to "R". */
7531 extended_remote_restart ();
7534 if (!have_inferiors ())
7536 /* Clean up from the last time we ran, before we mark the target
7537 running again. This will mark breakpoints uninserted, and
7538 get_offsets may insert breakpoints. */
7539 init_thread_list ();
7540 init_wait_for_inferior ();
7543 /* Now mark the inferior as running before we do anything else. */
7544 inferior_ptid
= magic_null_ptid
;
7546 /* Now, if we have thread information, update inferior_ptid. */
7547 inferior_ptid
= remote_current_thread (inferior_ptid
);
7549 remote_add_inferior (ptid_get_pid (inferior_ptid
), 0);
7550 add_thread_silent (inferior_ptid
);
7552 /* Get updated offsets, if the stub uses qOffsets. */
7557 extended_remote_create_inferior (struct target_ops
*ops
,
7558 char *exec_file
, char *args
,
7559 char **env
, int from_tty
)
7561 extended_remote_create_inferior_1 (exec_file
, args
, env
, from_tty
);
7565 /* Insert a breakpoint. On targets that have software breakpoint
7566 support, we ask the remote target to do the work; on targets
7567 which don't, we insert a traditional memory breakpoint. */
7570 remote_insert_breakpoint (struct gdbarch
*gdbarch
,
7571 struct bp_target_info
*bp_tgt
)
7573 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
7574 If it succeeds, then set the support to PACKET_ENABLE. If it
7575 fails, and the user has explicitly requested the Z support then
7576 report an error, otherwise, mark it disabled and go on. */
7578 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
7580 CORE_ADDR addr
= bp_tgt
->placed_address
;
7581 struct remote_state
*rs
;
7585 gdbarch_remote_breakpoint_from_pc (gdbarch
, &addr
, &bpsize
);
7587 rs
= get_remote_state ();
7593 addr
= (ULONGEST
) remote_address_masked (addr
);
7594 p
+= hexnumstr (p
, addr
);
7595 sprintf (p
, ",%d", bpsize
);
7598 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7600 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
7605 bp_tgt
->placed_address
= addr
;
7606 bp_tgt
->placed_size
= bpsize
;
7608 case PACKET_UNKNOWN
:
7613 return memory_insert_breakpoint (gdbarch
, bp_tgt
);
7617 remote_remove_breakpoint (struct gdbarch
*gdbarch
,
7618 struct bp_target_info
*bp_tgt
)
7620 CORE_ADDR addr
= bp_tgt
->placed_address
;
7621 struct remote_state
*rs
= get_remote_state ();
7623 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
7631 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
7632 p
+= hexnumstr (p
, addr
);
7633 sprintf (p
, ",%d", bp_tgt
->placed_size
);
7636 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7638 return (rs
->buf
[0] == 'E');
7641 return memory_remove_breakpoint (gdbarch
, bp_tgt
);
7645 watchpoint_to_Z_packet (int type
)
7650 return Z_PACKET_WRITE_WP
;
7653 return Z_PACKET_READ_WP
;
7656 return Z_PACKET_ACCESS_WP
;
7659 internal_error (__FILE__
, __LINE__
,
7660 _("hw_bp_to_z: bad watchpoint type %d"), type
);
7665 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
,
7666 struct expression
*cond
)
7668 struct remote_state
*rs
= get_remote_state ();
7670 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
7672 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
7675 sprintf (rs
->buf
, "Z%x,", packet
);
7676 p
= strchr (rs
->buf
, '\0');
7677 addr
= remote_address_masked (addr
);
7678 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7679 sprintf (p
, ",%x", len
);
7682 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7684 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
7688 case PACKET_UNKNOWN
:
7693 internal_error (__FILE__
, __LINE__
,
7694 _("remote_insert_watchpoint: reached end of function"));
7699 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
,
7700 struct expression
*cond
)
7702 struct remote_state
*rs
= get_remote_state ();
7704 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
7706 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
7709 sprintf (rs
->buf
, "z%x,", packet
);
7710 p
= strchr (rs
->buf
, '\0');
7711 addr
= remote_address_masked (addr
);
7712 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7713 sprintf (p
, ",%x", len
);
7715 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7717 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
7720 case PACKET_UNKNOWN
:
7725 internal_error (__FILE__
, __LINE__
,
7726 _("remote_remove_watchpoint: reached end of function"));
7730 int remote_hw_watchpoint_limit
= -1;
7731 int remote_hw_breakpoint_limit
= -1;
7734 remote_check_watch_resources (int type
, int cnt
, int ot
)
7736 if (type
== bp_hardware_breakpoint
)
7738 if (remote_hw_breakpoint_limit
== 0)
7740 else if (remote_hw_breakpoint_limit
< 0)
7742 else if (cnt
<= remote_hw_breakpoint_limit
)
7747 if (remote_hw_watchpoint_limit
== 0)
7749 else if (remote_hw_watchpoint_limit
< 0)
7753 else if (cnt
<= remote_hw_watchpoint_limit
)
7760 remote_stopped_by_watchpoint (void)
7762 return remote_stopped_by_watchpoint_p
;
7766 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
7770 if (remote_stopped_by_watchpoint ())
7772 *addr_p
= remote_watch_data_address
;
7781 remote_insert_hw_breakpoint (struct gdbarch
*gdbarch
,
7782 struct bp_target_info
*bp_tgt
)
7785 struct remote_state
*rs
;
7788 /* The length field should be set to the size of a breakpoint
7789 instruction, even though we aren't inserting one ourselves. */
7791 gdbarch_remote_breakpoint_from_pc
7792 (gdbarch
, &bp_tgt
->placed_address
, &bp_tgt
->placed_size
);
7794 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7797 rs
= get_remote_state ();
7804 addr
= remote_address_masked (bp_tgt
->placed_address
);
7805 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7806 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7809 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7811 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7814 case PACKET_UNKNOWN
:
7819 internal_error (__FILE__
, __LINE__
,
7820 _("remote_insert_hw_breakpoint: reached end of function"));
7825 remote_remove_hw_breakpoint (struct gdbarch
*gdbarch
,
7826 struct bp_target_info
*bp_tgt
)
7829 struct remote_state
*rs
= get_remote_state ();
7832 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7839 addr
= remote_address_masked (bp_tgt
->placed_address
);
7840 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7841 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7844 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7846 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7849 case PACKET_UNKNOWN
:
7854 internal_error (__FILE__
, __LINE__
,
7855 _("remote_remove_hw_breakpoint: reached end of function"));
7858 /* Table used by the crc32 function to calcuate the checksum. */
7860 static unsigned long crc32_table
[256] =
7863 static unsigned long
7864 crc32 (const unsigned char *buf
, int len
, unsigned int crc
)
7866 if (!crc32_table
[1])
7868 /* Initialize the CRC table and the decoding table. */
7872 for (i
= 0; i
< 256; i
++)
7874 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
7875 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
7882 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
7888 /* Verify memory using the "qCRC:" request. */
7891 remote_verify_memory (struct target_ops
*ops
,
7892 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
7894 struct remote_state
*rs
= get_remote_state ();
7895 unsigned long host_crc
, target_crc
;
7898 /* FIXME: assumes lma can fit into long. */
7899 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
7900 (long) lma
, (long) size
);
7903 /* Be clever; compute the host_crc before waiting for target
7905 host_crc
= crc32 (data
, size
, 0xffffffff);
7907 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7908 if (rs
->buf
[0] == 'E')
7911 if (rs
->buf
[0] != 'C')
7912 error (_("remote target does not support this operation"));
7914 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
7915 target_crc
= target_crc
* 16 + fromhex (*tmp
);
7917 return (host_crc
== target_crc
);
7920 /* compare-sections command
7922 With no arguments, compares each loadable section in the exec bfd
7923 with the same memory range on the target, and reports mismatches.
7924 Useful for verifying the image on the target against the exec file. */
7927 compare_sections_command (char *args
, int from_tty
)
7930 struct cleanup
*old_chain
;
7932 const char *sectname
;
7940 error (_("command cannot be used without an exec file"));
7942 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
7944 if (!(s
->flags
& SEC_LOAD
))
7945 continue; /* Skip non-loadable section. */
7947 size
= bfd_get_section_size (s
);
7949 continue; /* Skip zero-length section. */
7951 sectname
= bfd_get_section_name (exec_bfd
, s
);
7952 if (args
&& strcmp (args
, sectname
) != 0)
7953 continue; /* Not the section selected by user. */
7955 matched
= 1; /* Do this section. */
7958 sectdata
= xmalloc (size
);
7959 old_chain
= make_cleanup (xfree
, sectdata
);
7960 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
7962 res
= target_verify_memory (sectdata
, lma
, size
);
7965 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
7966 paddress (target_gdbarch
, lma
),
7967 paddress (target_gdbarch
, lma
+ size
));
7969 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
7970 paddress (target_gdbarch
, lma
),
7971 paddress (target_gdbarch
, lma
+ size
));
7973 printf_filtered ("matched.\n");
7976 printf_filtered ("MIS-MATCHED!\n");
7980 do_cleanups (old_chain
);
7983 warning (_("One or more sections of the remote executable does not match\n\
7984 the loaded file\n"));
7985 if (args
&& !matched
)
7986 printf_filtered (_("No loaded section named '%s'.\n"), args
);
7989 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
7990 into remote target. The number of bytes written to the remote
7991 target is returned, or -1 for error. */
7994 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
7995 const char *annex
, const gdb_byte
*writebuf
,
7996 ULONGEST offset
, LONGEST len
,
7997 struct packet_config
*packet
)
8001 struct remote_state
*rs
= get_remote_state ();
8002 int max_size
= get_memory_write_packet_size ();
8004 if (packet
->support
== PACKET_DISABLE
)
8007 /* Insert header. */
8008 i
= snprintf (rs
->buf
, max_size
,
8009 "qXfer:%s:write:%s:%s:",
8010 object_name
, annex
? annex
: "",
8011 phex_nz (offset
, sizeof offset
));
8012 max_size
-= (i
+ 1);
8014 /* Escape as much data as fits into rs->buf. */
8015 buf_len
= remote_escape_output
8016 (writebuf
, len
, (rs
->buf
+ i
), &max_size
, max_size
);
8018 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
8019 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
8020 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
8023 unpack_varlen_hex (rs
->buf
, &n
);
8027 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
8028 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
8029 number of bytes read is returned, or 0 for EOF, or -1 for error.
8030 The number of bytes read may be less than LEN without indicating an
8031 EOF. PACKET is checked and updated to indicate whether the remote
8032 target supports this object. */
8035 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
8037 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
8038 struct packet_config
*packet
)
8040 static char *finished_object
;
8041 static char *finished_annex
;
8042 static ULONGEST finished_offset
;
8044 struct remote_state
*rs
= get_remote_state ();
8045 LONGEST i
, n
, packet_len
;
8047 if (packet
->support
== PACKET_DISABLE
)
8050 /* Check whether we've cached an end-of-object packet that matches
8052 if (finished_object
)
8054 if (strcmp (object_name
, finished_object
) == 0
8055 && strcmp (annex
? annex
: "", finished_annex
) == 0
8056 && offset
== finished_offset
)
8059 /* Otherwise, we're now reading something different. Discard
8061 xfree (finished_object
);
8062 xfree (finished_annex
);
8063 finished_object
= NULL
;
8064 finished_annex
= NULL
;
8067 /* Request only enough to fit in a single packet. The actual data
8068 may not, since we don't know how much of it will need to be escaped;
8069 the target is free to respond with slightly less data. We subtract
8070 five to account for the response type and the protocol frame. */
8071 n
= min (get_remote_packet_size () - 5, len
);
8072 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
8073 object_name
, annex
? annex
: "",
8074 phex_nz (offset
, sizeof offset
),
8075 phex_nz (n
, sizeof n
));
8076 i
= putpkt (rs
->buf
);
8081 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
8082 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
8085 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
8086 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
8088 /* 'm' means there is (or at least might be) more data after this
8089 batch. That does not make sense unless there's at least one byte
8090 of data in this reply. */
8091 if (rs
->buf
[0] == 'm' && packet_len
== 1)
8092 error (_("Remote qXfer reply contained no data."));
8094 /* Got some data. */
8095 i
= remote_unescape_input (rs
->buf
+ 1, packet_len
- 1, readbuf
, n
);
8097 /* 'l' is an EOF marker, possibly including a final block of data,
8098 or possibly empty. If we have the final block of a non-empty
8099 object, record this fact to bypass a subsequent partial read. */
8100 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
8102 finished_object
= xstrdup (object_name
);
8103 finished_annex
= xstrdup (annex
? annex
: "");
8104 finished_offset
= offset
+ i
;
8111 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
8112 const char *annex
, gdb_byte
*readbuf
,
8113 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
8115 struct remote_state
*rs
;
8120 set_remote_traceframe ();
8121 set_general_thread (inferior_ptid
);
8123 rs
= get_remote_state ();
8125 /* Handle memory using the standard memory routines. */
8126 if (object
== TARGET_OBJECT_MEMORY
)
8132 /* If the remote target is connected but not running, we should
8133 pass this request down to a lower stratum (e.g. the executable
8135 if (!target_has_execution
)
8138 if (writebuf
!= NULL
)
8139 xfered
= remote_write_bytes (offset
, writebuf
, len
);
8141 xfered
= remote_read_bytes (offset
, readbuf
, len
);
8145 else if (xfered
== 0 && errno
== 0)
8151 /* Handle SPU memory using qxfer packets. */
8152 if (object
== TARGET_OBJECT_SPU
)
8155 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
8156 &remote_protocol_packets
8157 [PACKET_qXfer_spu_read
]);
8159 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
8160 &remote_protocol_packets
8161 [PACKET_qXfer_spu_write
]);
8164 /* Handle extra signal info using qxfer packets. */
8165 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
8168 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
8169 &remote_protocol_packets
8170 [PACKET_qXfer_siginfo_read
]);
8172 return remote_write_qxfer (ops
, "siginfo", annex
,
8173 writebuf
, offset
, len
,
8174 &remote_protocol_packets
8175 [PACKET_qXfer_siginfo_write
]);
8178 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
8181 return remote_read_qxfer (ops
, "statictrace", annex
,
8182 readbuf
, offset
, len
,
8183 &remote_protocol_packets
8184 [PACKET_qXfer_statictrace_read
]);
8189 /* Only handle flash writes. */
8190 if (writebuf
!= NULL
)
8196 case TARGET_OBJECT_FLASH
:
8197 xfered
= remote_flash_write (ops
, offset
, len
, writebuf
);
8201 else if (xfered
== 0 && errno
== 0)
8211 /* Map pre-existing objects onto letters. DO NOT do this for new
8212 objects!!! Instead specify new query packets. */
8215 case TARGET_OBJECT_AVR
:
8219 case TARGET_OBJECT_AUXV
:
8220 gdb_assert (annex
== NULL
);
8221 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
8222 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
8224 case TARGET_OBJECT_AVAILABLE_FEATURES
:
8225 return remote_read_qxfer
8226 (ops
, "features", annex
, readbuf
, offset
, len
,
8227 &remote_protocol_packets
[PACKET_qXfer_features
]);
8229 case TARGET_OBJECT_LIBRARIES
:
8230 return remote_read_qxfer
8231 (ops
, "libraries", annex
, readbuf
, offset
, len
,
8232 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
8234 case TARGET_OBJECT_MEMORY_MAP
:
8235 gdb_assert (annex
== NULL
);
8236 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
8237 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
8239 case TARGET_OBJECT_OSDATA
:
8240 /* Should only get here if we're connected. */
8241 gdb_assert (remote_desc
);
8242 return remote_read_qxfer
8243 (ops
, "osdata", annex
, readbuf
, offset
, len
,
8244 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
8246 case TARGET_OBJECT_THREADS
:
8247 gdb_assert (annex
== NULL
);
8248 return remote_read_qxfer (ops
, "threads", annex
, readbuf
, offset
, len
,
8249 &remote_protocol_packets
[PACKET_qXfer_threads
]);
8251 case TARGET_OBJECT_TRACEFRAME_INFO
:
8252 gdb_assert (annex
== NULL
);
8253 return remote_read_qxfer
8254 (ops
, "traceframe-info", annex
, readbuf
, offset
, len
,
8255 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
8260 /* Note: a zero OFFSET and LEN can be used to query the minimum
8262 if (offset
== 0 && len
== 0)
8263 return (get_remote_packet_size ());
8264 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
8265 large enough let the caller deal with it. */
8266 if (len
< get_remote_packet_size ())
8268 len
= get_remote_packet_size ();
8270 /* Except for querying the minimum buffer size, target must be open. */
8272 error (_("remote query is only available after target open"));
8274 gdb_assert (annex
!= NULL
);
8275 gdb_assert (readbuf
!= NULL
);
8281 /* We used one buffer char for the remote protocol q command and
8282 another for the query type. As the remote protocol encapsulation
8283 uses 4 chars plus one extra in case we are debugging
8284 (remote_debug), we have PBUFZIZ - 7 left to pack the query
8287 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
8289 /* Bad caller may have sent forbidden characters. */
8290 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
8295 gdb_assert (annex
[i
] == '\0');
8297 i
= putpkt (rs
->buf
);
8301 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8302 strcpy ((char *) readbuf
, rs
->buf
);
8304 return strlen ((char *) readbuf
);
8308 remote_search_memory (struct target_ops
* ops
,
8309 CORE_ADDR start_addr
, ULONGEST search_space_len
,
8310 const gdb_byte
*pattern
, ULONGEST pattern_len
,
8311 CORE_ADDR
*found_addrp
)
8313 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
8314 struct remote_state
*rs
= get_remote_state ();
8315 int max_size
= get_memory_write_packet_size ();
8316 struct packet_config
*packet
=
8317 &remote_protocol_packets
[PACKET_qSearch_memory
];
8318 /* Number of packet bytes used to encode the pattern;
8319 this could be more than PATTERN_LEN due to escape characters. */
8320 int escaped_pattern_len
;
8321 /* Amount of pattern that was encodable in the packet. */
8322 int used_pattern_len
;
8325 ULONGEST found_addr
;
8327 /* Don't go to the target if we don't have to.
8328 This is done before checking packet->support to avoid the possibility that
8329 a success for this edge case means the facility works in general. */
8330 if (pattern_len
> search_space_len
)
8332 if (pattern_len
== 0)
8334 *found_addrp
= start_addr
;
8338 /* If we already know the packet isn't supported, fall back to the simple
8339 way of searching memory. */
8341 if (packet
->support
== PACKET_DISABLE
)
8343 /* Target doesn't provided special support, fall back and use the
8344 standard support (copy memory and do the search here). */
8345 return simple_search_memory (ops
, start_addr
, search_space_len
,
8346 pattern
, pattern_len
, found_addrp
);
8349 /* Insert header. */
8350 i
= snprintf (rs
->buf
, max_size
,
8351 "qSearch:memory:%s;%s;",
8352 phex_nz (start_addr
, addr_size
),
8353 phex_nz (search_space_len
, sizeof (search_space_len
)));
8354 max_size
-= (i
+ 1);
8356 /* Escape as much data as fits into rs->buf. */
8357 escaped_pattern_len
=
8358 remote_escape_output (pattern
, pattern_len
, (rs
->buf
+ i
),
8359 &used_pattern_len
, max_size
);
8361 /* Bail if the pattern is too large. */
8362 if (used_pattern_len
!= pattern_len
)
8363 error (_("Pattern is too large to transmit to remote target."));
8365 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
8366 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
8367 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
8369 /* The request may not have worked because the command is not
8370 supported. If so, fall back to the simple way. */
8371 if (packet
->support
== PACKET_DISABLE
)
8373 return simple_search_memory (ops
, start_addr
, search_space_len
,
8374 pattern
, pattern_len
, found_addrp
);
8379 if (rs
->buf
[0] == '0')
8381 else if (rs
->buf
[0] == '1')
8384 if (rs
->buf
[1] != ',')
8385 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
8386 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
8387 *found_addrp
= found_addr
;
8390 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
8396 remote_rcmd (char *command
,
8397 struct ui_file
*outbuf
)
8399 struct remote_state
*rs
= get_remote_state ();
8403 error (_("remote rcmd is only available after target open"));
8405 /* Send a NULL command across as an empty command. */
8406 if (command
== NULL
)
8409 /* The query prefix. */
8410 strcpy (rs
->buf
, "qRcmd,");
8411 p
= strchr (rs
->buf
, '\0');
8413 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/)
8414 > get_remote_packet_size ())
8415 error (_("\"monitor\" command ``%s'' is too long."), command
);
8417 /* Encode the actual command. */
8418 bin2hex ((gdb_byte
*) command
, p
, 0);
8420 if (putpkt (rs
->buf
) < 0)
8421 error (_("Communication problem with target."));
8423 /* get/display the response */
8428 /* XXX - see also remote_get_noisy_reply(). */
8430 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8433 error (_("Target does not support this command."));
8434 if (buf
[0] == 'O' && buf
[1] != 'K')
8436 remote_console_output (buf
+ 1); /* 'O' message from stub. */
8439 if (strcmp (buf
, "OK") == 0)
8441 if (strlen (buf
) == 3 && buf
[0] == 'E'
8442 && isdigit (buf
[1]) && isdigit (buf
[2]))
8444 error (_("Protocol error with Rcmd"));
8446 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
8448 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
8450 fputc_unfiltered (c
, outbuf
);
8456 static VEC(mem_region_s
) *
8457 remote_memory_map (struct target_ops
*ops
)
8459 VEC(mem_region_s
) *result
= NULL
;
8460 char *text
= target_read_stralloc (¤t_target
,
8461 TARGET_OBJECT_MEMORY_MAP
, NULL
);
8465 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
8467 result
= parse_memory_map (text
);
8468 do_cleanups (back_to
);
8475 packet_command (char *args
, int from_tty
)
8477 struct remote_state
*rs
= get_remote_state ();
8480 error (_("command can only be used with remote target"));
8483 error (_("remote-packet command requires packet text as argument"));
8485 puts_filtered ("sending: ");
8486 print_packet (args
);
8487 puts_filtered ("\n");
8490 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8491 puts_filtered ("received: ");
8492 print_packet (rs
->buf
);
8493 puts_filtered ("\n");
8497 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
8499 static void display_thread_info (struct gdb_ext_thread_info
*info
);
8501 static void threadset_test_cmd (char *cmd
, int tty
);
8503 static void threadalive_test (char *cmd
, int tty
);
8505 static void threadlist_test_cmd (char *cmd
, int tty
);
8507 int get_and_display_threadinfo (threadref
*ref
);
8509 static void threadinfo_test_cmd (char *cmd
, int tty
);
8511 static int thread_display_step (threadref
*ref
, void *context
);
8513 static void threadlist_update_test_cmd (char *cmd
, int tty
);
8515 static void init_remote_threadtests (void);
8517 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
8520 threadset_test_cmd (char *cmd
, int tty
)
8522 int sample_thread
= SAMPLE_THREAD
;
8524 printf_filtered (_("Remote threadset test\n"));
8525 set_general_thread (sample_thread
);
8530 threadalive_test (char *cmd
, int tty
)
8532 int sample_thread
= SAMPLE_THREAD
;
8533 int pid
= ptid_get_pid (inferior_ptid
);
8534 ptid_t ptid
= ptid_build (pid
, 0, sample_thread
);
8536 if (remote_thread_alive (ptid
))
8537 printf_filtered ("PASS: Thread alive test\n");
8539 printf_filtered ("FAIL: Thread alive test\n");
8542 void output_threadid (char *title
, threadref
*ref
);
8545 output_threadid (char *title
, threadref
*ref
)
8549 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
8551 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
8555 threadlist_test_cmd (char *cmd
, int tty
)
8558 threadref nextthread
;
8559 int done
, result_count
;
8560 threadref threadlist
[3];
8562 printf_filtered ("Remote Threadlist test\n");
8563 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
8564 &result_count
, &threadlist
[0]))
8565 printf_filtered ("FAIL: threadlist test\n");
8568 threadref
*scan
= threadlist
;
8569 threadref
*limit
= scan
+ result_count
;
8571 while (scan
< limit
)
8572 output_threadid (" thread ", scan
++);
8577 display_thread_info (struct gdb_ext_thread_info
*info
)
8579 output_threadid ("Threadid: ", &info
->threadid
);
8580 printf_filtered ("Name: %s\n ", info
->shortname
);
8581 printf_filtered ("State: %s\n", info
->display
);
8582 printf_filtered ("other: %s\n\n", info
->more_display
);
8586 get_and_display_threadinfo (threadref
*ref
)
8590 struct gdb_ext_thread_info threadinfo
;
8592 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
8593 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
8594 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
8595 display_thread_info (&threadinfo
);
8600 threadinfo_test_cmd (char *cmd
, int tty
)
8602 int athread
= SAMPLE_THREAD
;
8606 int_to_threadref (&thread
, athread
);
8607 printf_filtered ("Remote Threadinfo test\n");
8608 if (!get_and_display_threadinfo (&thread
))
8609 printf_filtered ("FAIL cannot get thread info\n");
8613 thread_display_step (threadref
*ref
, void *context
)
8615 /* output_threadid(" threadstep ",ref); *//* simple test */
8616 return get_and_display_threadinfo (ref
);
8620 threadlist_update_test_cmd (char *cmd
, int tty
)
8622 printf_filtered ("Remote Threadlist update test\n");
8623 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
8627 init_remote_threadtests (void)
8629 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
8630 _("Fetch and print the remote list of "
8631 "thread identifiers, one pkt only"));
8632 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
8633 _("Fetch and display info about one thread"));
8634 add_com ("tset", class_obscure
, threadset_test_cmd
,
8635 _("Test setting to a different thread"));
8636 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
8637 _("Iterate through updating all remote thread info"));
8638 add_com ("talive", class_obscure
, threadalive_test
,
8639 _(" Remote thread alive test "));
8644 /* Convert a thread ID to a string. Returns the string in a static
8648 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
8650 static char buf
[64];
8651 struct remote_state
*rs
= get_remote_state ();
8653 if (ptid_is_pid (ptid
))
8655 /* Printing an inferior target id. */
8657 /* When multi-process extensions are off, there's no way in the
8658 remote protocol to know the remote process id, if there's any
8659 at all. There's one exception --- when we're connected with
8660 target extended-remote, and we manually attached to a process
8661 with "attach PID". We don't record anywhere a flag that
8662 allows us to distinguish that case from the case of
8663 connecting with extended-remote and the stub already being
8664 attached to a process, and reporting yes to qAttached, hence
8665 no smart special casing here. */
8666 if (!remote_multi_process_p (rs
))
8668 xsnprintf (buf
, sizeof buf
, "Remote target");
8672 return normal_pid_to_str (ptid
);
8676 if (ptid_equal (magic_null_ptid
, ptid
))
8677 xsnprintf (buf
, sizeof buf
, "Thread <main>");
8678 else if (remote_multi_process_p (rs
))
8679 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
8680 ptid_get_pid (ptid
), ptid_get_tid (ptid
));
8682 xsnprintf (buf
, sizeof buf
, "Thread %ld",
8683 ptid_get_tid (ptid
));
8688 /* Get the address of the thread local variable in OBJFILE which is
8689 stored at OFFSET within the thread local storage for thread PTID. */
8692 remote_get_thread_local_address (struct target_ops
*ops
,
8693 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
8695 if (remote_protocol_packets
[PACKET_qGetTLSAddr
].support
!= PACKET_DISABLE
)
8697 struct remote_state
*rs
= get_remote_state ();
8699 char *endp
= rs
->buf
+ get_remote_packet_size ();
8700 enum packet_result result
;
8702 strcpy (p
, "qGetTLSAddr:");
8704 p
= write_ptid (p
, endp
, ptid
);
8706 p
+= hexnumstr (p
, offset
);
8708 p
+= hexnumstr (p
, lm
);
8712 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8713 result
= packet_ok (rs
->buf
,
8714 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
8715 if (result
== PACKET_OK
)
8719 unpack_varlen_hex (rs
->buf
, &result
);
8722 else if (result
== PACKET_UNKNOWN
)
8723 throw_error (TLS_GENERIC_ERROR
,
8724 _("Remote target doesn't support qGetTLSAddr packet"));
8726 throw_error (TLS_GENERIC_ERROR
,
8727 _("Remote target failed to process qGetTLSAddr request"));
8730 throw_error (TLS_GENERIC_ERROR
,
8731 _("TLS not supported or disabled on this target"));
8736 /* Provide thread local base, i.e. Thread Information Block address.
8737 Returns 1 if ptid is found and thread_local_base is non zero. */
8740 remote_get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
8742 if (remote_protocol_packets
[PACKET_qGetTIBAddr
].support
!= PACKET_DISABLE
)
8744 struct remote_state
*rs
= get_remote_state ();
8746 char *endp
= rs
->buf
+ get_remote_packet_size ();
8747 enum packet_result result
;
8749 strcpy (p
, "qGetTIBAddr:");
8751 p
= write_ptid (p
, endp
, ptid
);
8755 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8756 result
= packet_ok (rs
->buf
,
8757 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
8758 if (result
== PACKET_OK
)
8762 unpack_varlen_hex (rs
->buf
, &result
);
8764 *addr
= (CORE_ADDR
) result
;
8767 else if (result
== PACKET_UNKNOWN
)
8768 error (_("Remote target doesn't support qGetTIBAddr packet"));
8770 error (_("Remote target failed to process qGetTIBAddr request"));
8773 error (_("qGetTIBAddr not supported or disabled on this target"));
8778 /* Support for inferring a target description based on the current
8779 architecture and the size of a 'g' packet. While the 'g' packet
8780 can have any size (since optional registers can be left off the
8781 end), some sizes are easily recognizable given knowledge of the
8782 approximate architecture. */
8784 struct remote_g_packet_guess
8787 const struct target_desc
*tdesc
;
8789 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
8790 DEF_VEC_O(remote_g_packet_guess_s
);
8792 struct remote_g_packet_data
8794 VEC(remote_g_packet_guess_s
) *guesses
;
8797 static struct gdbarch_data
*remote_g_packet_data_handle
;
8800 remote_g_packet_data_init (struct obstack
*obstack
)
8802 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
8806 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
8807 const struct target_desc
*tdesc
)
8809 struct remote_g_packet_data
*data
8810 = gdbarch_data (gdbarch
, remote_g_packet_data_handle
);
8811 struct remote_g_packet_guess new_guess
, *guess
;
8814 gdb_assert (tdesc
!= NULL
);
8817 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
8819 if (guess
->bytes
== bytes
)
8820 internal_error (__FILE__
, __LINE__
,
8821 _("Duplicate g packet description added for size %d"),
8824 new_guess
.bytes
= bytes
;
8825 new_guess
.tdesc
= tdesc
;
8826 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
8829 /* Return 1 if remote_read_description would do anything on this target
8830 and architecture, 0 otherwise. */
8833 remote_read_description_p (struct target_ops
*target
)
8835 struct remote_g_packet_data
*data
8836 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
8838 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
8844 static const struct target_desc
*
8845 remote_read_description (struct target_ops
*target
)
8847 struct remote_g_packet_data
*data
8848 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
8850 /* Do not try this during initial connection, when we do not know
8851 whether there is a running but stopped thread. */
8852 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
8855 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
8857 struct remote_g_packet_guess
*guess
;
8859 int bytes
= send_g_packet ();
8862 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
8864 if (guess
->bytes
== bytes
)
8865 return guess
->tdesc
;
8867 /* We discard the g packet. A minor optimization would be to
8868 hold on to it, and fill the register cache once we have selected
8869 an architecture, but it's too tricky to do safely. */
8875 /* Remote file transfer support. This is host-initiated I/O, not
8876 target-initiated; for target-initiated, see remote-fileio.c. */
8878 /* If *LEFT is at least the length of STRING, copy STRING to
8879 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8880 decrease *LEFT. Otherwise raise an error. */
8883 remote_buffer_add_string (char **buffer
, int *left
, char *string
)
8885 int len
= strlen (string
);
8888 error (_("Packet too long for target."));
8890 memcpy (*buffer
, string
, len
);
8894 /* NUL-terminate the buffer as a convenience, if there is
8900 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
8901 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8902 decrease *LEFT. Otherwise raise an error. */
8905 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
8908 if (2 * len
> *left
)
8909 error (_("Packet too long for target."));
8911 bin2hex (bytes
, *buffer
, len
);
8915 /* NUL-terminate the buffer as a convenience, if there is
8921 /* If *LEFT is large enough, convert VALUE to hex and add it to
8922 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8923 decrease *LEFT. Otherwise raise an error. */
8926 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
8928 int len
= hexnumlen (value
);
8931 error (_("Packet too long for target."));
8933 hexnumstr (*buffer
, value
);
8937 /* NUL-terminate the buffer as a convenience, if there is
8943 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
8944 value, *REMOTE_ERRNO to the remote error number or zero if none
8945 was included, and *ATTACHMENT to point to the start of the annex
8946 if any. The length of the packet isn't needed here; there may
8947 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
8949 Return 0 if the packet could be parsed, -1 if it could not. If
8950 -1 is returned, the other variables may not be initialized. */
8953 remote_hostio_parse_result (char *buffer
, int *retcode
,
8954 int *remote_errno
, char **attachment
)
8961 if (buffer
[0] != 'F')
8965 *retcode
= strtol (&buffer
[1], &p
, 16);
8966 if (errno
!= 0 || p
== &buffer
[1])
8969 /* Check for ",errno". */
8973 *remote_errno
= strtol (p
+ 1, &p2
, 16);
8974 if (errno
!= 0 || p
+ 1 == p2
)
8979 /* Check for ";attachment". If there is no attachment, the
8980 packet should end here. */
8983 *attachment
= p
+ 1;
8986 else if (*p
== '\0')
8992 /* Send a prepared I/O packet to the target and read its response.
8993 The prepared packet is in the global RS->BUF before this function
8994 is called, and the answer is there when we return.
8996 COMMAND_BYTES is the length of the request to send, which may include
8997 binary data. WHICH_PACKET is the packet configuration to check
8998 before attempting a packet. If an error occurs, *REMOTE_ERRNO
8999 is set to the error number and -1 is returned. Otherwise the value
9000 returned by the function is returned.
9002 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
9003 attachment is expected; an error will be reported if there's a
9004 mismatch. If one is found, *ATTACHMENT will be set to point into
9005 the packet buffer and *ATTACHMENT_LEN will be set to the
9006 attachment's length. */
9009 remote_hostio_send_command (int command_bytes
, int which_packet
,
9010 int *remote_errno
, char **attachment
,
9011 int *attachment_len
)
9013 struct remote_state
*rs
= get_remote_state ();
9014 int ret
, bytes_read
;
9015 char *attachment_tmp
;
9018 || remote_protocol_packets
[which_packet
].support
== PACKET_DISABLE
)
9020 *remote_errno
= FILEIO_ENOSYS
;
9024 putpkt_binary (rs
->buf
, command_bytes
);
9025 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
9027 /* If it timed out, something is wrong. Don't try to parse the
9031 *remote_errno
= FILEIO_EINVAL
;
9035 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
9038 *remote_errno
= FILEIO_EINVAL
;
9040 case PACKET_UNKNOWN
:
9041 *remote_errno
= FILEIO_ENOSYS
;
9047 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
9050 *remote_errno
= FILEIO_EINVAL
;
9054 /* Make sure we saw an attachment if and only if we expected one. */
9055 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
9056 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
9058 *remote_errno
= FILEIO_EINVAL
;
9062 /* If an attachment was found, it must point into the packet buffer;
9063 work out how many bytes there were. */
9064 if (attachment_tmp
!= NULL
)
9066 *attachment
= attachment_tmp
;
9067 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
9073 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
9074 remote file descriptor, or -1 if an error occurs (and set
9078 remote_hostio_open (const char *filename
, int flags
, int mode
,
9081 struct remote_state
*rs
= get_remote_state ();
9083 int left
= get_remote_packet_size () - 1;
9085 remote_buffer_add_string (&p
, &left
, "vFile:open:");
9087 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
9089 remote_buffer_add_string (&p
, &left
, ",");
9091 remote_buffer_add_int (&p
, &left
, flags
);
9092 remote_buffer_add_string (&p
, &left
, ",");
9094 remote_buffer_add_int (&p
, &left
, mode
);
9096 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
9097 remote_errno
, NULL
, NULL
);
9100 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
9101 Return the number of bytes written, or -1 if an error occurs (and
9102 set *REMOTE_ERRNO). */
9105 remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
9106 ULONGEST offset
, int *remote_errno
)
9108 struct remote_state
*rs
= get_remote_state ();
9110 int left
= get_remote_packet_size ();
9113 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
9115 remote_buffer_add_int (&p
, &left
, fd
);
9116 remote_buffer_add_string (&p
, &left
, ",");
9118 remote_buffer_add_int (&p
, &left
, offset
);
9119 remote_buffer_add_string (&p
, &left
, ",");
9121 p
+= remote_escape_output (write_buf
, len
, p
, &out_len
,
9122 get_remote_packet_size () - (p
- rs
->buf
));
9124 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
9125 remote_errno
, NULL
, NULL
);
9128 /* Read up to LEN bytes FD on the remote target into READ_BUF
9129 Return the number of bytes read, or -1 if an error occurs (and
9130 set *REMOTE_ERRNO). */
9133 remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
9134 ULONGEST offset
, int *remote_errno
)
9136 struct remote_state
*rs
= get_remote_state ();
9139 int left
= get_remote_packet_size ();
9140 int ret
, attachment_len
;
9143 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
9145 remote_buffer_add_int (&p
, &left
, fd
);
9146 remote_buffer_add_string (&p
, &left
, ",");
9148 remote_buffer_add_int (&p
, &left
, len
);
9149 remote_buffer_add_string (&p
, &left
, ",");
9151 remote_buffer_add_int (&p
, &left
, offset
);
9153 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
9154 remote_errno
, &attachment
,
9160 read_len
= remote_unescape_input (attachment
, attachment_len
,
9162 if (read_len
!= ret
)
9163 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
9168 /* Close FD on the remote target. Return 0, or -1 if an error occurs
9169 (and set *REMOTE_ERRNO). */
9172 remote_hostio_close (int fd
, int *remote_errno
)
9174 struct remote_state
*rs
= get_remote_state ();
9176 int left
= get_remote_packet_size () - 1;
9178 remote_buffer_add_string (&p
, &left
, "vFile:close:");
9180 remote_buffer_add_int (&p
, &left
, fd
);
9182 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
9183 remote_errno
, NULL
, NULL
);
9186 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
9187 occurs (and set *REMOTE_ERRNO). */
9190 remote_hostio_unlink (const char *filename
, int *remote_errno
)
9192 struct remote_state
*rs
= get_remote_state ();
9194 int left
= get_remote_packet_size () - 1;
9196 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
9198 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
9201 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
9202 remote_errno
, NULL
, NULL
);
9206 remote_fileio_errno_to_host (int errnum
)
9230 case FILEIO_ENOTDIR
:
9250 case FILEIO_ENAMETOOLONG
:
9251 return ENAMETOOLONG
;
9257 remote_hostio_error (int errnum
)
9259 int host_error
= remote_fileio_errno_to_host (errnum
);
9261 if (host_error
== -1)
9262 error (_("Unknown remote I/O error %d"), errnum
);
9264 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
9268 remote_hostio_close_cleanup (void *opaque
)
9270 int fd
= *(int *) opaque
;
9273 remote_hostio_close (fd
, &remote_errno
);
9278 remote_bfd_iovec_open (struct bfd
*abfd
, void *open_closure
)
9280 const char *filename
= bfd_get_filename (abfd
);
9281 int fd
, remote_errno
;
9284 gdb_assert (remote_filename_p (filename
));
9286 fd
= remote_hostio_open (filename
+ 7, FILEIO_O_RDONLY
, 0, &remote_errno
);
9289 errno
= remote_fileio_errno_to_host (remote_errno
);
9290 bfd_set_error (bfd_error_system_call
);
9294 stream
= xmalloc (sizeof (int));
9300 remote_bfd_iovec_close (struct bfd
*abfd
, void *stream
)
9302 int fd
= *(int *)stream
;
9307 /* Ignore errors on close; these may happen if the remote
9308 connection was already torn down. */
9309 remote_hostio_close (fd
, &remote_errno
);
9315 remote_bfd_iovec_pread (struct bfd
*abfd
, void *stream
, void *buf
,
9316 file_ptr nbytes
, file_ptr offset
)
9318 int fd
= *(int *)stream
;
9320 file_ptr pos
, bytes
;
9323 while (nbytes
> pos
)
9325 bytes
= remote_hostio_pread (fd
, (char *)buf
+ pos
, nbytes
- pos
,
9326 offset
+ pos
, &remote_errno
);
9328 /* Success, but no bytes, means end-of-file. */
9332 errno
= remote_fileio_errno_to_host (remote_errno
);
9333 bfd_set_error (bfd_error_system_call
);
9344 remote_bfd_iovec_stat (struct bfd
*abfd
, void *stream
, struct stat
*sb
)
9346 /* FIXME: We should probably implement remote_hostio_stat. */
9347 sb
->st_size
= INT_MAX
;
9352 remote_filename_p (const char *filename
)
9354 return strncmp (filename
, "remote:", 7) == 0;
9358 remote_bfd_open (const char *remote_file
, const char *target
)
9360 return bfd_openr_iovec (remote_file
, target
,
9361 remote_bfd_iovec_open
, NULL
,
9362 remote_bfd_iovec_pread
,
9363 remote_bfd_iovec_close
,
9364 remote_bfd_iovec_stat
);
9368 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
9370 struct cleanup
*back_to
, *close_cleanup
;
9371 int retcode
, fd
, remote_errno
, bytes
, io_size
;
9374 int bytes_in_buffer
;
9379 error (_("command can only be used with remote target"));
9381 file
= fopen (local_file
, "rb");
9383 perror_with_name (local_file
);
9384 back_to
= make_cleanup_fclose (file
);
9386 fd
= remote_hostio_open (remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
9388 0700, &remote_errno
);
9390 remote_hostio_error (remote_errno
);
9392 /* Send up to this many bytes at once. They won't all fit in the
9393 remote packet limit, so we'll transfer slightly fewer. */
9394 io_size
= get_remote_packet_size ();
9395 buffer
= xmalloc (io_size
);
9396 make_cleanup (xfree
, buffer
);
9398 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
9400 bytes_in_buffer
= 0;
9403 while (bytes_in_buffer
|| !saw_eof
)
9407 bytes
= fread (buffer
+ bytes_in_buffer
, 1,
9408 io_size
- bytes_in_buffer
,
9413 error (_("Error reading %s."), local_file
);
9416 /* EOF. Unless there is something still in the
9417 buffer from the last iteration, we are done. */
9419 if (bytes_in_buffer
== 0)
9427 bytes
+= bytes_in_buffer
;
9428 bytes_in_buffer
= 0;
9430 retcode
= remote_hostio_pwrite (fd
, buffer
, bytes
,
9431 offset
, &remote_errno
);
9434 remote_hostio_error (remote_errno
);
9435 else if (retcode
== 0)
9436 error (_("Remote write of %d bytes returned 0!"), bytes
);
9437 else if (retcode
< bytes
)
9439 /* Short write. Save the rest of the read data for the next
9441 bytes_in_buffer
= bytes
- retcode
;
9442 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
9448 discard_cleanups (close_cleanup
);
9449 if (remote_hostio_close (fd
, &remote_errno
))
9450 remote_hostio_error (remote_errno
);
9453 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
9454 do_cleanups (back_to
);
9458 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
9460 struct cleanup
*back_to
, *close_cleanup
;
9461 int fd
, remote_errno
, bytes
, io_size
;
9467 error (_("command can only be used with remote target"));
9469 fd
= remote_hostio_open (remote_file
, FILEIO_O_RDONLY
, 0, &remote_errno
);
9471 remote_hostio_error (remote_errno
);
9473 file
= fopen (local_file
, "wb");
9475 perror_with_name (local_file
);
9476 back_to
= make_cleanup_fclose (file
);
9478 /* Send up to this many bytes at once. They won't all fit in the
9479 remote packet limit, so we'll transfer slightly fewer. */
9480 io_size
= get_remote_packet_size ();
9481 buffer
= xmalloc (io_size
);
9482 make_cleanup (xfree
, buffer
);
9484 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
9489 bytes
= remote_hostio_pread (fd
, buffer
, io_size
, offset
, &remote_errno
);
9491 /* Success, but no bytes, means end-of-file. */
9494 remote_hostio_error (remote_errno
);
9498 bytes
= fwrite (buffer
, 1, bytes
, file
);
9500 perror_with_name (local_file
);
9503 discard_cleanups (close_cleanup
);
9504 if (remote_hostio_close (fd
, &remote_errno
))
9505 remote_hostio_error (remote_errno
);
9508 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
9509 do_cleanups (back_to
);
9513 remote_file_delete (const char *remote_file
, int from_tty
)
9515 int retcode
, remote_errno
;
9518 error (_("command can only be used with remote target"));
9520 retcode
= remote_hostio_unlink (remote_file
, &remote_errno
);
9522 remote_hostio_error (remote_errno
);
9525 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
9529 remote_put_command (char *args
, int from_tty
)
9531 struct cleanup
*back_to
;
9535 error_no_arg (_("file to put"));
9537 argv
= gdb_buildargv (args
);
9538 back_to
= make_cleanup_freeargv (argv
);
9539 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
9540 error (_("Invalid parameters to remote put"));
9542 remote_file_put (argv
[0], argv
[1], from_tty
);
9544 do_cleanups (back_to
);
9548 remote_get_command (char *args
, int from_tty
)
9550 struct cleanup
*back_to
;
9554 error_no_arg (_("file to get"));
9556 argv
= gdb_buildargv (args
);
9557 back_to
= make_cleanup_freeargv (argv
);
9558 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
9559 error (_("Invalid parameters to remote get"));
9561 remote_file_get (argv
[0], argv
[1], from_tty
);
9563 do_cleanups (back_to
);
9567 remote_delete_command (char *args
, int from_tty
)
9569 struct cleanup
*back_to
;
9573 error_no_arg (_("file to delete"));
9575 argv
= gdb_buildargv (args
);
9576 back_to
= make_cleanup_freeargv (argv
);
9577 if (argv
[0] == NULL
|| argv
[1] != NULL
)
9578 error (_("Invalid parameters to remote delete"));
9580 remote_file_delete (argv
[0], from_tty
);
9582 do_cleanups (back_to
);
9586 remote_command (char *args
, int from_tty
)
9588 help_list (remote_cmdlist
, "remote ", -1, gdb_stdout
);
9592 remote_can_execute_reverse (void)
9594 if (remote_protocol_packets
[PACKET_bs
].support
== PACKET_ENABLE
9595 || remote_protocol_packets
[PACKET_bc
].support
== PACKET_ENABLE
)
9602 remote_supports_non_stop (void)
9608 remote_supports_multi_process (void)
9610 struct remote_state
*rs
= get_remote_state ();
9612 return remote_multi_process_p (rs
);
9616 remote_supports_cond_tracepoints (void)
9618 struct remote_state
*rs
= get_remote_state ();
9620 return rs
->cond_tracepoints
;
9624 remote_supports_fast_tracepoints (void)
9626 struct remote_state
*rs
= get_remote_state ();
9628 return rs
->fast_tracepoints
;
9632 remote_supports_static_tracepoints (void)
9634 struct remote_state
*rs
= get_remote_state ();
9636 return rs
->static_tracepoints
;
9640 remote_trace_init (void)
9643 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9644 if (strcmp (target_buf
, "OK") != 0)
9645 error (_("Target does not support this command."));
9648 static void free_actions_list (char **actions_list
);
9649 static void free_actions_list_cleanup_wrapper (void *);
9651 free_actions_list_cleanup_wrapper (void *al
)
9653 free_actions_list (al
);
9657 free_actions_list (char **actions_list
)
9661 if (actions_list
== 0)
9664 for (ndx
= 0; actions_list
[ndx
]; ndx
++)
9665 xfree (actions_list
[ndx
]);
9667 xfree (actions_list
);
9670 /* Recursive routine to walk through command list including loops, and
9671 download packets for each command. */
9674 remote_download_command_source (int num
, ULONGEST addr
,
9675 struct command_line
*cmds
)
9677 struct remote_state
*rs
= get_remote_state ();
9678 struct command_line
*cmd
;
9680 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
9682 QUIT
; /* Allow user to bail out with ^C. */
9683 strcpy (rs
->buf
, "QTDPsrc:");
9684 encode_source_string (num
, addr
, "cmd", cmd
->line
,
9685 rs
->buf
+ strlen (rs
->buf
),
9686 rs
->buf_size
- strlen (rs
->buf
));
9688 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9689 if (strcmp (target_buf
, "OK"))
9690 warning (_("Target does not support source download."));
9692 if (cmd
->control_type
== while_control
9693 || cmd
->control_type
== while_stepping_control
)
9695 remote_download_command_source (num
, addr
, *cmd
->body_list
);
9697 QUIT
; /* Allow user to bail out with ^C. */
9698 strcpy (rs
->buf
, "QTDPsrc:");
9699 encode_source_string (num
, addr
, "cmd", "end",
9700 rs
->buf
+ strlen (rs
->buf
),
9701 rs
->buf_size
- strlen (rs
->buf
));
9703 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9704 if (strcmp (target_buf
, "OK"))
9705 warning (_("Target does not support source download."));
9711 remote_download_tracepoint (struct breakpoint
*t
)
9713 struct bp_location
*loc
;
9718 char **stepping_actions
;
9720 struct cleanup
*old_chain
= NULL
;
9721 struct agent_expr
*aexpr
;
9722 struct cleanup
*aexpr_chain
= NULL
;
9725 /* Iterate over all the tracepoint locations. It's up to the target to
9726 notice multiple tracepoint packets with the same number but different
9727 addresses, and treat them as multiple locations. */
9728 for (loc
= t
->loc
; loc
; loc
= loc
->next
)
9730 encode_actions (t
, loc
, &tdp_actions
, &stepping_actions
);
9731 old_chain
= make_cleanup (free_actions_list_cleanup_wrapper
,
9733 (void) make_cleanup (free_actions_list_cleanup_wrapper
,
9736 tpaddr
= loc
->address
;
9737 sprintf_vma (addrbuf
, tpaddr
);
9738 sprintf (buf
, "QTDP:%x:%s:%c:%lx:%x", t
->number
,
9739 addrbuf
, /* address */
9740 (t
->enable_state
== bp_enabled
? 'E' : 'D'),
9741 t
->step_count
, t
->pass_count
);
9742 /* Fast tracepoints are mostly handled by the target, but we can
9743 tell the target how big of an instruction block should be moved
9745 if (t
->type
== bp_fast_tracepoint
)
9747 /* Only test for support at download time; we may not know
9748 target capabilities at definition time. */
9749 if (remote_supports_fast_tracepoints ())
9753 if (gdbarch_fast_tracepoint_valid_at (target_gdbarch
,
9754 tpaddr
, &isize
, NULL
))
9755 sprintf (buf
+ strlen (buf
), ":F%x", isize
);
9757 /* If it passed validation at definition but fails now,
9758 something is very wrong. */
9759 internal_error (__FILE__
, __LINE__
,
9760 _("Fast tracepoint not "
9761 "valid during download"));
9764 /* Fast tracepoints are functionally identical to regular
9765 tracepoints, so don't take lack of support as a reason to
9766 give up on the trace run. */
9767 warning (_("Target does not support fast tracepoints, "
9768 "downloading %d as regular tracepoint"), t
->number
);
9770 else if (t
->type
== bp_static_tracepoint
)
9772 /* Only test for support at download time; we may not know
9773 target capabilities at definition time. */
9774 if (remote_supports_static_tracepoints ())
9776 struct static_tracepoint_marker marker
;
9778 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
9781 error (_("Static tracepoint not valid during download"));
9784 /* Fast tracepoints are functionally identical to regular
9785 tracepoints, so don't take lack of support as a reason
9786 to give up on the trace run. */
9787 error (_("Target does not support static tracepoints"));
9789 /* If the tracepoint has a conditional, make it into an agent
9790 expression and append to the definition. */
9793 /* Only test support at download time, we may not know target
9794 capabilities at definition time. */
9795 if (remote_supports_cond_tracepoints ())
9797 aexpr
= gen_eval_for_expr (tpaddr
, loc
->cond
);
9798 aexpr_chain
= make_cleanup_free_agent_expr (aexpr
);
9799 sprintf (buf
+ strlen (buf
), ":X%x,", aexpr
->len
);
9800 pkt
= buf
+ strlen (buf
);
9801 for (ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
9802 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
9804 do_cleanups (aexpr_chain
);
9807 warning (_("Target does not support conditional tracepoints, "
9808 "ignoring tp %d cond"), t
->number
);
9811 if (t
->commands
|| *default_collect
)
9814 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9815 if (strcmp (target_buf
, "OK"))
9816 error (_("Target does not support tracepoints."));
9818 /* do_single_steps (t); */
9821 for (ndx
= 0; tdp_actions
[ndx
]; ndx
++)
9823 QUIT
; /* Allow user to bail out with ^C. */
9824 sprintf (buf
, "QTDP:-%x:%s:%s%c",
9825 t
->number
, addrbuf
, /* address */
9827 ((tdp_actions
[ndx
+ 1] || stepping_actions
)
9830 remote_get_noisy_reply (&target_buf
,
9832 if (strcmp (target_buf
, "OK"))
9833 error (_("Error on target while setting tracepoints."));
9836 if (stepping_actions
)
9838 for (ndx
= 0; stepping_actions
[ndx
]; ndx
++)
9840 QUIT
; /* Allow user to bail out with ^C. */
9841 sprintf (buf
, "QTDP:-%x:%s:%s%s%s",
9842 t
->number
, addrbuf
, /* address */
9843 ((ndx
== 0) ? "S" : ""),
9844 stepping_actions
[ndx
],
9845 (stepping_actions
[ndx
+ 1] ? "-" : ""));
9847 remote_get_noisy_reply (&target_buf
,
9849 if (strcmp (target_buf
, "OK"))
9850 error (_("Error on target while setting tracepoints."));
9854 if (remote_protocol_packets
[PACKET_TracepointSource
].support
9859 strcpy (buf
, "QTDPsrc:");
9860 encode_source_string (t
->number
, loc
->address
,
9861 "at", t
->addr_string
, buf
+ strlen (buf
),
9862 2048 - strlen (buf
));
9865 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9866 if (strcmp (target_buf
, "OK"))
9867 warning (_("Target does not support source download."));
9871 strcpy (buf
, "QTDPsrc:");
9872 encode_source_string (t
->number
, loc
->address
,
9873 "cond", t
->cond_string
, buf
+ strlen (buf
),
9874 2048 - strlen (buf
));
9876 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9877 if (strcmp (target_buf
, "OK"))
9878 warning (_("Target does not support source download."));
9880 remote_download_command_source (t
->number
, loc
->address
,
9881 breakpoint_commands (t
));
9884 do_cleanups (old_chain
);
9889 remote_download_trace_state_variable (struct trace_state_variable
*tsv
)
9891 struct remote_state
*rs
= get_remote_state ();
9894 sprintf (rs
->buf
, "QTDV:%x:%s:%x:",
9895 tsv
->number
, phex ((ULONGEST
) tsv
->initial_value
, 8), tsv
->builtin
);
9896 p
= rs
->buf
+ strlen (rs
->buf
);
9897 if ((p
- rs
->buf
) + strlen (tsv
->name
) * 2 >= get_remote_packet_size ())
9898 error (_("Trace state variable name too long for tsv definition packet"));
9899 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
->name
), p
, 0);
9902 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9903 if (*target_buf
== '\0')
9904 error (_("Target does not support this command."));
9905 if (strcmp (target_buf
, "OK") != 0)
9906 error (_("Error on target while downloading trace state variable."));
9910 remote_trace_set_readonly_regions (void)
9918 return; /* No information to give. */
9920 strcpy (target_buf
, "QTro");
9921 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
9923 char tmp1
[40], tmp2
[40];
9925 if ((s
->flags
& SEC_LOAD
) == 0 ||
9926 /* (s->flags & SEC_CODE) == 0 || */
9927 (s
->flags
& SEC_READONLY
) == 0)
9931 vma
= bfd_get_section_vma (,s
);
9932 size
= bfd_get_section_size (s
);
9933 sprintf_vma (tmp1
, vma
);
9934 sprintf_vma (tmp2
, vma
+ size
);
9935 sprintf (target_buf
+ strlen (target_buf
),
9936 ":%s,%s", tmp1
, tmp2
);
9940 putpkt (target_buf
);
9941 getpkt (&target_buf
, &target_buf_size
, 0);
9946 remote_trace_start (void)
9949 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9950 if (*target_buf
== '\0')
9951 error (_("Target does not support this command."));
9952 if (strcmp (target_buf
, "OK") != 0)
9953 error (_("Bogus reply from target: %s"), target_buf
);
9957 remote_get_trace_status (struct trace_status
*ts
)
9960 /* FIXME we need to get register block size some other way. */
9961 extern int trace_regblock_size
;
9963 trace_regblock_size
= get_remote_arch_state ()->sizeof_g_packet
;
9965 putpkt ("qTStatus");
9966 p
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9968 /* If the remote target doesn't do tracing, flag it. */
9972 /* We're working with a live target. */
9975 /* Set some defaults. */
9976 ts
->running_known
= 0;
9977 ts
->stop_reason
= trace_stop_reason_unknown
;
9978 ts
->traceframe_count
= -1;
9979 ts
->buffer_free
= 0;
9982 error (_("Bogus trace status reply from target: %s"), target_buf
);
9984 parse_trace_status (p
, ts
);
9990 remote_trace_stop (void)
9993 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9994 if (*target_buf
== '\0')
9995 error (_("Target does not support this command."));
9996 if (strcmp (target_buf
, "OK") != 0)
9997 error (_("Bogus reply from target: %s"), target_buf
);
10001 remote_trace_find (enum trace_find_type type
, int num
,
10002 ULONGEST addr1
, ULONGEST addr2
,
10005 struct remote_state
*rs
= get_remote_state ();
10007 int target_frameno
= -1, target_tracept
= -1;
10009 /* Lookups other than by absolute frame number depend on the current
10010 trace selected, so make sure it is correct on the remote end
10012 if (type
!= tfind_number
)
10013 set_remote_traceframe ();
10016 strcpy (p
, "QTFrame:");
10017 p
= strchr (p
, '\0');
10021 sprintf (p
, "%x", num
);
10024 sprintf (p
, "pc:%s", phex_nz (addr1
, 0));
10027 sprintf (p
, "tdp:%x", num
);
10030 sprintf (p
, "range:%s:%s", phex_nz (addr1
, 0), phex_nz (addr2
, 0));
10032 case tfind_outside
:
10033 sprintf (p
, "outside:%s:%s", phex_nz (addr1
, 0), phex_nz (addr2
, 0));
10036 error (_("Unknown trace find type %d"), type
);
10040 reply
= remote_get_noisy_reply (&(rs
->buf
), &sizeof_pkt
);
10041 if (*reply
== '\0')
10042 error (_("Target does not support this command."));
10044 while (reply
&& *reply
)
10049 target_frameno
= (int) strtol (p
, &reply
, 16);
10051 error (_("Unable to parse trace frame number"));
10052 /* Don't update our remote traceframe number cache on failure
10053 to select a remote traceframe. */
10054 if (target_frameno
== -1)
10059 target_tracept
= (int) strtol (p
, &reply
, 16);
10061 error (_("Unable to parse tracepoint number"));
10063 case 'O': /* "OK"? */
10064 if (reply
[1] == 'K' && reply
[2] == '\0')
10067 error (_("Bogus reply from target: %s"), reply
);
10070 error (_("Bogus reply from target: %s"), reply
);
10073 *tpp
= target_tracept
;
10075 remote_traceframe_number
= target_frameno
;
10076 return target_frameno
;
10080 remote_get_trace_state_variable_value (int tsvnum
, LONGEST
*val
)
10082 struct remote_state
*rs
= get_remote_state ();
10086 set_remote_traceframe ();
10088 sprintf (rs
->buf
, "qTV:%x", tsvnum
);
10090 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
10091 if (reply
&& *reply
)
10095 unpack_varlen_hex (reply
+ 1, &uval
);
10096 *val
= (LONGEST
) uval
;
10104 remote_save_trace_data (const char *filename
)
10106 struct remote_state
*rs
= get_remote_state ();
10110 strcpy (p
, "QTSave:");
10112 if ((p
- rs
->buf
) + strlen (filename
) * 2 >= get_remote_packet_size ())
10113 error (_("Remote file name too long for trace save packet"));
10114 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, 0);
10117 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
10118 if (*reply
!= '\0')
10119 error (_("Target does not support this command."));
10120 if (strcmp (reply
, "OK") != 0)
10121 error (_("Bogus reply from target: %s"), reply
);
10125 /* This is basically a memory transfer, but needs to be its own packet
10126 because we don't know how the target actually organizes its trace
10127 memory, plus we want to be able to ask for as much as possible, but
10128 not be unhappy if we don't get as much as we ask for. */
10131 remote_get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
10133 struct remote_state
*rs
= get_remote_state ();
10139 strcpy (p
, "qTBuffer:");
10141 p
+= hexnumstr (p
, offset
);
10143 p
+= hexnumstr (p
, len
);
10147 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
10148 if (reply
&& *reply
)
10150 /* 'l' by itself means we're at the end of the buffer and
10151 there is nothing more to get. */
10155 /* Convert the reply into binary. Limit the number of bytes to
10156 convert according to our passed-in buffer size, rather than
10157 what was returned in the packet; if the target is
10158 unexpectedly generous and gives us a bigger reply than we
10159 asked for, we don't want to crash. */
10160 rslt
= hex2bin (target_buf
, buf
, len
);
10164 /* Something went wrong, flag as an error. */
10169 remote_set_disconnected_tracing (int val
)
10171 struct remote_state
*rs
= get_remote_state ();
10173 if (rs
->disconnected_tracing
)
10177 sprintf (rs
->buf
, "QTDisconnected:%x", val
);
10179 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
10180 if (*reply
== '\0')
10181 error (_("Target does not support this command."));
10182 if (strcmp (reply
, "OK") != 0)
10183 error (_("Bogus reply from target: %s"), reply
);
10186 warning (_("Target does not support disconnected tracing."));
10190 remote_core_of_thread (struct target_ops
*ops
, ptid_t ptid
)
10192 struct thread_info
*info
= find_thread_ptid (ptid
);
10194 if (info
&& info
->private)
10195 return info
->private->core
;
10200 remote_set_circular_trace_buffer (int val
)
10202 struct remote_state
*rs
= get_remote_state ();
10205 sprintf (rs
->buf
, "QTBuffer:circular:%x", val
);
10207 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
10208 if (*reply
== '\0')
10209 error (_("Target does not support this command."));
10210 if (strcmp (reply
, "OK") != 0)
10211 error (_("Bogus reply from target: %s"), reply
);
10214 static struct traceframe_info
*
10215 remote_traceframe_info (void)
10219 text
= target_read_stralloc (¤t_target
,
10220 TARGET_OBJECT_TRACEFRAME_INFO
, NULL
);
10223 struct traceframe_info
*info
;
10224 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
10226 info
= parse_traceframe_info (text
);
10227 do_cleanups (back_to
);
10235 init_remote_ops (void)
10237 remote_ops
.to_shortname
= "remote";
10238 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
10239 remote_ops
.to_doc
=
10240 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
10241 Specify the serial device it is connected to\n\
10242 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
10243 remote_ops
.to_open
= remote_open
;
10244 remote_ops
.to_close
= remote_close
;
10245 remote_ops
.to_detach
= remote_detach
;
10246 remote_ops
.to_disconnect
= remote_disconnect
;
10247 remote_ops
.to_resume
= remote_resume
;
10248 remote_ops
.to_wait
= remote_wait
;
10249 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
10250 remote_ops
.to_store_registers
= remote_store_registers
;
10251 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
10252 remote_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
10253 remote_ops
.to_files_info
= remote_files_info
;
10254 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
10255 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
10256 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
10257 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
10258 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
10259 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
10260 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
10261 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
10262 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
10263 remote_ops
.to_kill
= remote_kill
;
10264 remote_ops
.to_load
= generic_load
;
10265 remote_ops
.to_mourn_inferior
= remote_mourn
;
10266 remote_ops
.to_notice_signals
= remote_notice_signals
;
10267 remote_ops
.to_thread_alive
= remote_thread_alive
;
10268 remote_ops
.to_find_new_threads
= remote_threads_info
;
10269 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
10270 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
10271 remote_ops
.to_get_ada_task_ptid
= remote_get_ada_task_ptid
;
10272 remote_ops
.to_stop
= remote_stop
;
10273 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
10274 remote_ops
.to_rcmd
= remote_rcmd
;
10275 remote_ops
.to_log_command
= serial_log_command
;
10276 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
10277 remote_ops
.to_stratum
= process_stratum
;
10278 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
10279 remote_ops
.to_has_memory
= default_child_has_memory
;
10280 remote_ops
.to_has_stack
= default_child_has_stack
;
10281 remote_ops
.to_has_registers
= default_child_has_registers
;
10282 remote_ops
.to_has_execution
= default_child_has_execution
;
10283 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
10284 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
10285 remote_ops
.to_magic
= OPS_MAGIC
;
10286 remote_ops
.to_memory_map
= remote_memory_map
;
10287 remote_ops
.to_flash_erase
= remote_flash_erase
;
10288 remote_ops
.to_flash_done
= remote_flash_done
;
10289 remote_ops
.to_read_description
= remote_read_description
;
10290 remote_ops
.to_search_memory
= remote_search_memory
;
10291 remote_ops
.to_can_async_p
= remote_can_async_p
;
10292 remote_ops
.to_is_async_p
= remote_is_async_p
;
10293 remote_ops
.to_async
= remote_async
;
10294 remote_ops
.to_async_mask
= remote_async_mask
;
10295 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
10296 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
10297 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
10298 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
10299 remote_ops
.to_trace_init
= remote_trace_init
;
10300 remote_ops
.to_download_tracepoint
= remote_download_tracepoint
;
10301 remote_ops
.to_download_trace_state_variable
10302 = remote_download_trace_state_variable
;
10303 remote_ops
.to_trace_set_readonly_regions
= remote_trace_set_readonly_regions
;
10304 remote_ops
.to_trace_start
= remote_trace_start
;
10305 remote_ops
.to_get_trace_status
= remote_get_trace_status
;
10306 remote_ops
.to_trace_stop
= remote_trace_stop
;
10307 remote_ops
.to_trace_find
= remote_trace_find
;
10308 remote_ops
.to_get_trace_state_variable_value
10309 = remote_get_trace_state_variable_value
;
10310 remote_ops
.to_save_trace_data
= remote_save_trace_data
;
10311 remote_ops
.to_upload_tracepoints
= remote_upload_tracepoints
;
10312 remote_ops
.to_upload_trace_state_variables
10313 = remote_upload_trace_state_variables
;
10314 remote_ops
.to_get_raw_trace_data
= remote_get_raw_trace_data
;
10315 remote_ops
.to_set_disconnected_tracing
= remote_set_disconnected_tracing
;
10316 remote_ops
.to_set_circular_trace_buffer
= remote_set_circular_trace_buffer
;
10317 remote_ops
.to_core_of_thread
= remote_core_of_thread
;
10318 remote_ops
.to_verify_memory
= remote_verify_memory
;
10319 remote_ops
.to_get_tib_address
= remote_get_tib_address
;
10320 remote_ops
.to_set_permissions
= remote_set_permissions
;
10321 remote_ops
.to_static_tracepoint_marker_at
10322 = remote_static_tracepoint_marker_at
;
10323 remote_ops
.to_static_tracepoint_markers_by_strid
10324 = remote_static_tracepoint_markers_by_strid
;
10325 remote_ops
.to_traceframe_info
= remote_traceframe_info
;
10328 /* Set up the extended remote vector by making a copy of the standard
10329 remote vector and adding to it. */
10332 init_extended_remote_ops (void)
10334 extended_remote_ops
= remote_ops
;
10336 extended_remote_ops
.to_shortname
= "extended-remote";
10337 extended_remote_ops
.to_longname
=
10338 "Extended remote serial target in gdb-specific protocol";
10339 extended_remote_ops
.to_doc
=
10340 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
10341 Specify the serial device it is connected to (e.g. /dev/ttya).";
10342 extended_remote_ops
.to_open
= extended_remote_open
;
10343 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
10344 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
10345 extended_remote_ops
.to_detach
= extended_remote_detach
;
10346 extended_remote_ops
.to_attach
= extended_remote_attach
;
10347 extended_remote_ops
.to_kill
= extended_remote_kill
;
10351 remote_can_async_p (void)
10353 if (!target_async_permitted
)
10354 /* We only enable async when the user specifically asks for it. */
10357 /* We're async whenever the serial device is. */
10358 return remote_async_mask_value
&& serial_can_async_p (remote_desc
);
10362 remote_is_async_p (void)
10364 if (!target_async_permitted
)
10365 /* We only enable async when the user specifically asks for it. */
10368 /* We're async whenever the serial device is. */
10369 return remote_async_mask_value
&& serial_is_async_p (remote_desc
);
10372 /* Pass the SERIAL event on and up to the client. One day this code
10373 will be able to delay notifying the client of an event until the
10374 point where an entire packet has been received. */
10376 static void (*async_client_callback
) (enum inferior_event_type event_type
,
10378 static void *async_client_context
;
10379 static serial_event_ftype remote_async_serial_handler
;
10382 remote_async_serial_handler (struct serial
*scb
, void *context
)
10384 /* Don't propogate error information up to the client. Instead let
10385 the client find out about the error by querying the target. */
10386 async_client_callback (INF_REG_EVENT
, async_client_context
);
10390 remote_async_inferior_event_handler (gdb_client_data data
)
10392 inferior_event_handler (INF_REG_EVENT
, NULL
);
10396 remote_async_get_pending_events_handler (gdb_client_data data
)
10398 remote_get_pending_stop_replies ();
10402 remote_async (void (*callback
) (enum inferior_event_type event_type
,
10403 void *context
), void *context
)
10405 if (remote_async_mask_value
== 0)
10406 internal_error (__FILE__
, __LINE__
,
10407 _("Calling remote_async when async is masked"));
10409 if (callback
!= NULL
)
10411 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
10412 async_client_callback
= callback
;
10413 async_client_context
= context
;
10416 serial_async (remote_desc
, NULL
, NULL
);
10420 remote_async_mask (int new_mask
)
10422 int curr_mask
= remote_async_mask_value
;
10424 remote_async_mask_value
= new_mask
;
10429 set_remote_cmd (char *args
, int from_tty
)
10431 help_list (remote_set_cmdlist
, "set remote ", -1, gdb_stdout
);
10435 show_remote_cmd (char *args
, int from_tty
)
10437 /* We can't just use cmd_show_list here, because we want to skip
10438 the redundant "show remote Z-packet" and the legacy aliases. */
10439 struct cleanup
*showlist_chain
;
10440 struct cmd_list_element
*list
= remote_show_cmdlist
;
10442 showlist_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "showlist");
10443 for (; list
!= NULL
; list
= list
->next
)
10444 if (strcmp (list
->name
, "Z-packet") == 0)
10446 else if (list
->type
== not_set_cmd
)
10447 /* Alias commands are exactly like the original, except they
10448 don't have the normal type. */
10452 struct cleanup
*option_chain
10453 = make_cleanup_ui_out_tuple_begin_end (uiout
, "option");
10455 ui_out_field_string (uiout
, "name", list
->name
);
10456 ui_out_text (uiout
, ": ");
10457 if (list
->type
== show_cmd
)
10458 do_setshow_command ((char *) NULL
, from_tty
, list
);
10460 cmd_func (list
, NULL
, from_tty
);
10461 /* Close the tuple. */
10462 do_cleanups (option_chain
);
10465 /* Close the tuple. */
10466 do_cleanups (showlist_chain
);
10470 /* Function to be called whenever a new objfile (shlib) is detected. */
10472 remote_new_objfile (struct objfile
*objfile
)
10474 if (remote_desc
!= 0) /* Have a remote connection. */
10475 remote_check_symbols (objfile
);
10478 /* Pull all the tracepoints defined on the target and create local
10479 data structures representing them. We don't want to create real
10480 tracepoints yet, we don't want to mess up the user's existing
10484 remote_upload_tracepoints (struct uploaded_tp
**utpp
)
10486 struct remote_state
*rs
= get_remote_state ();
10489 /* Ask for a first packet of tracepoint definition. */
10491 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10493 while (*p
&& *p
!= 'l')
10495 parse_tracepoint_definition (p
, utpp
);
10496 /* Ask for another packet of tracepoint definition. */
10498 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10505 remote_upload_trace_state_variables (struct uploaded_tsv
**utsvp
)
10507 struct remote_state
*rs
= get_remote_state ();
10510 /* Ask for a first packet of variable definition. */
10512 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10514 while (*p
&& *p
!= 'l')
10516 parse_tsv_definition (p
, utsvp
);
10517 /* Ask for another packet of variable definition. */
10519 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10526 _initialize_remote (void)
10528 struct remote_state
*rs
;
10529 struct cmd_list_element
*cmd
;
10532 /* architecture specific data */
10533 remote_gdbarch_data_handle
=
10534 gdbarch_data_register_post_init (init_remote_state
);
10535 remote_g_packet_data_handle
=
10536 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
10538 /* Initialize the per-target state. At the moment there is only one
10539 of these, not one per target. Only one target is active at a
10540 time. The default buffer size is unimportant; it will be expanded
10541 whenever a larger buffer is needed. */
10542 rs
= get_remote_state_raw ();
10543 rs
->buf_size
= 400;
10544 rs
->buf
= xmalloc (rs
->buf_size
);
10546 init_remote_ops ();
10547 add_target (&remote_ops
);
10549 init_extended_remote_ops ();
10550 add_target (&extended_remote_ops
);
10552 /* Hook into new objfile notification. */
10553 observer_attach_new_objfile (remote_new_objfile
);
10555 /* Set up signal handlers. */
10556 sigint_remote_token
=
10557 create_async_signal_handler (async_remote_interrupt
, NULL
);
10558 sigint_remote_twice_token
=
10559 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
10562 init_remote_threadtests ();
10565 /* set/show remote ... */
10567 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
10568 Remote protocol specific variables\n\
10569 Configure various remote-protocol specific variables such as\n\
10570 the packets being used"),
10571 &remote_set_cmdlist
, "set remote ",
10572 0 /* allow-unknown */, &setlist
);
10573 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
10574 Remote protocol specific variables\n\
10575 Configure various remote-protocol specific variables such as\n\
10576 the packets being used"),
10577 &remote_show_cmdlist
, "show remote ",
10578 0 /* allow-unknown */, &showlist
);
10580 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
10581 Compare section data on target to the exec file.\n\
10582 Argument is a single section name (default: all loaded sections)."),
10585 add_cmd ("packet", class_maintenance
, packet_command
, _("\
10586 Send an arbitrary packet to a remote target.\n\
10587 maintenance packet TEXT\n\
10588 If GDB is talking to an inferior via the GDB serial protocol, then\n\
10589 this command sends the string TEXT to the inferior, and displays the\n\
10590 response packet. GDB supplies the initial `$' character, and the\n\
10591 terminating `#' character and checksum."),
10594 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
10595 Set whether to send break if interrupted."), _("\
10596 Show whether to send break if interrupted."), _("\
10597 If set, a break, instead of a cntrl-c, is sent to the remote target."),
10598 set_remotebreak
, show_remotebreak
,
10599 &setlist
, &showlist
);
10600 cmd_name
= "remotebreak";
10601 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
10602 deprecate_cmd (cmd
, "set remote interrupt-sequence");
10603 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
10604 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
10605 deprecate_cmd (cmd
, "show remote interrupt-sequence");
10607 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
10608 interrupt_sequence_modes
, &interrupt_sequence_mode
,
10610 Set interrupt sequence to remote target."), _("\
10611 Show interrupt sequence to remote target."), _("\
10612 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
10613 NULL
, show_interrupt_sequence
,
10614 &remote_set_cmdlist
,
10615 &remote_show_cmdlist
);
10617 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
10618 &interrupt_on_connect
, _("\
10619 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
10620 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
10621 If set, interrupt sequence is sent to remote target."),
10623 &remote_set_cmdlist
, &remote_show_cmdlist
);
10625 /* Install commands for configuring memory read/write packets. */
10627 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
10628 Set the maximum number of bytes per memory write packet (deprecated)."),
10630 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
10631 Show the maximum number of bytes per memory write packet (deprecated)."),
10633 add_cmd ("memory-write-packet-size", no_class
,
10634 set_memory_write_packet_size
, _("\
10635 Set the maximum number of bytes per memory-write packet.\n\
10636 Specify the number of bytes in a packet or 0 (zero) for the\n\
10637 default packet size. The actual limit is further reduced\n\
10638 dependent on the target. Specify ``fixed'' to disable the\n\
10639 further restriction and ``limit'' to enable that restriction."),
10640 &remote_set_cmdlist
);
10641 add_cmd ("memory-read-packet-size", no_class
,
10642 set_memory_read_packet_size
, _("\
10643 Set the maximum number of bytes per memory-read packet.\n\
10644 Specify the number of bytes in a packet or 0 (zero) for the\n\
10645 default packet size. The actual limit is further reduced\n\
10646 dependent on the target. Specify ``fixed'' to disable the\n\
10647 further restriction and ``limit'' to enable that restriction."),
10648 &remote_set_cmdlist
);
10649 add_cmd ("memory-write-packet-size", no_class
,
10650 show_memory_write_packet_size
,
10651 _("Show the maximum number of bytes per memory-write packet."),
10652 &remote_show_cmdlist
);
10653 add_cmd ("memory-read-packet-size", no_class
,
10654 show_memory_read_packet_size
,
10655 _("Show the maximum number of bytes per memory-read packet."),
10656 &remote_show_cmdlist
);
10658 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
10659 &remote_hw_watchpoint_limit
, _("\
10660 Set the maximum number of target hardware watchpoints."), _("\
10661 Show the maximum number of target hardware watchpoints."), _("\
10662 Specify a negative limit for unlimited."),
10663 NULL
, NULL
, /* FIXME: i18n: The maximum
10664 number of target hardware
10665 watchpoints is %s. */
10666 &remote_set_cmdlist
, &remote_show_cmdlist
);
10667 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
10668 &remote_hw_breakpoint_limit
, _("\
10669 Set the maximum number of target hardware breakpoints."), _("\
10670 Show the maximum number of target hardware breakpoints."), _("\
10671 Specify a negative limit for unlimited."),
10672 NULL
, NULL
, /* FIXME: i18n: The maximum
10673 number of target hardware
10674 breakpoints is %s. */
10675 &remote_set_cmdlist
, &remote_show_cmdlist
);
10677 add_setshow_integer_cmd ("remoteaddresssize", class_obscure
,
10678 &remote_address_size
, _("\
10679 Set the maximum size of the address (in bits) in a memory packet."), _("\
10680 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
10682 NULL
, /* FIXME: i18n: */
10683 &setlist
, &showlist
);
10685 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
10686 "X", "binary-download", 1);
10688 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
10689 "vCont", "verbose-resume", 0);
10691 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
10692 "QPassSignals", "pass-signals", 0);
10694 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
10695 "qSymbol", "symbol-lookup", 0);
10697 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
10698 "P", "set-register", 1);
10700 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
10701 "p", "fetch-register", 1);
10703 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
10704 "Z0", "software-breakpoint", 0);
10706 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
10707 "Z1", "hardware-breakpoint", 0);
10709 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
10710 "Z2", "write-watchpoint", 0);
10712 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
10713 "Z3", "read-watchpoint", 0);
10715 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
10716 "Z4", "access-watchpoint", 0);
10718 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
10719 "qXfer:auxv:read", "read-aux-vector", 0);
10721 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
10722 "qXfer:features:read", "target-features", 0);
10724 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
10725 "qXfer:libraries:read", "library-info", 0);
10727 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
10728 "qXfer:memory-map:read", "memory-map", 0);
10730 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
10731 "qXfer:spu:read", "read-spu-object", 0);
10733 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
10734 "qXfer:spu:write", "write-spu-object", 0);
10736 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
10737 "qXfer:osdata:read", "osdata", 0);
10739 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
10740 "qXfer:threads:read", "threads", 0);
10742 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
10743 "qXfer:siginfo:read", "read-siginfo-object", 0);
10745 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
10746 "qXfer:siginfo:write", "write-siginfo-object", 0);
10748 add_packet_config_cmd
10749 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
10750 "qXfer:trace-frame-info:read", "traceframe-info", 0);
10752 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
10753 "qGetTLSAddr", "get-thread-local-storage-address",
10756 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
10757 "qGetTIBAddr", "get-thread-information-block-address",
10760 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
10761 "bc", "reverse-continue", 0);
10763 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
10764 "bs", "reverse-step", 0);
10766 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
10767 "qSupported", "supported-packets", 0);
10769 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
10770 "qSearch:memory", "search-memory", 0);
10772 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
10773 "vFile:open", "hostio-open", 0);
10775 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
10776 "vFile:pread", "hostio-pread", 0);
10778 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
10779 "vFile:pwrite", "hostio-pwrite", 0);
10781 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
10782 "vFile:close", "hostio-close", 0);
10784 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
10785 "vFile:unlink", "hostio-unlink", 0);
10787 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
10788 "vAttach", "attach", 0);
10790 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
10793 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
10794 "QStartNoAckMode", "noack", 0);
10796 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
10797 "vKill", "kill", 0);
10799 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
10800 "qAttached", "query-attached", 0);
10802 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
10803 "ConditionalTracepoints",
10804 "conditional-tracepoints", 0);
10805 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
10806 "FastTracepoints", "fast-tracepoints", 0);
10808 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
10809 "TracepointSource", "TracepointSource", 0);
10811 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
10812 "QAllow", "allow", 0);
10814 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
10815 "StaticTracepoints", "static-tracepoints", 0);
10817 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
10818 "qXfer:statictrace:read", "read-sdata-object", 0);
10820 /* Keep the old ``set remote Z-packet ...'' working. Each individual
10821 Z sub-packet has its own set and show commands, but users may
10822 have sets to this variable in their .gdbinit files (or in their
10824 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
10825 &remote_Z_packet_detect
, _("\
10826 Set use of remote protocol `Z' packets"), _("\
10827 Show use of remote protocol `Z' packets "), _("\
10828 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
10830 set_remote_protocol_Z_packet_cmd
,
10831 show_remote_protocol_Z_packet_cmd
,
10832 /* FIXME: i18n: Use of remote protocol
10833 `Z' packets is %s. */
10834 &remote_set_cmdlist
, &remote_show_cmdlist
);
10836 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
10837 Manipulate files on the remote system\n\
10838 Transfer files to and from the remote target system."),
10839 &remote_cmdlist
, "remote ",
10840 0 /* allow-unknown */, &cmdlist
);
10842 add_cmd ("put", class_files
, remote_put_command
,
10843 _("Copy a local file to the remote system."),
10846 add_cmd ("get", class_files
, remote_get_command
,
10847 _("Copy a remote file to the local system."),
10850 add_cmd ("delete", class_files
, remote_delete_command
,
10851 _("Delete a remote file."),
10854 remote_exec_file
= xstrdup ("");
10855 add_setshow_string_noescape_cmd ("exec-file", class_files
,
10856 &remote_exec_file
, _("\
10857 Set the remote pathname for \"run\""), _("\
10858 Show the remote pathname for \"run\""), NULL
, NULL
, NULL
,
10859 &remote_set_cmdlist
, &remote_show_cmdlist
);
10861 /* Eventually initialize fileio. See fileio.c */
10862 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
10864 /* Take advantage of the fact that the LWP field is not used, to tag
10865 special ptids with it set to != 0. */
10866 magic_null_ptid
= ptid_build (42000, 1, -1);
10867 not_sent_ptid
= ptid_build (42000, 1, -2);
10868 any_thread_ptid
= ptid_build (42000, 1, 0);
10870 target_buf_size
= 2048;
10871 target_buf
= xmalloc (target_buf_size
);