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 map_regcache_remote_table (struct gdbarch
*gdbarch
, struct packet_reg
*regs
)
541 int regnum
, num_remote_regs
, offset
;
542 struct packet_reg
**remote_regs
;
544 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
546 struct packet_reg
*r
= ®s
[regnum
];
548 if (register_size (gdbarch
, regnum
) == 0)
549 /* Do not try to fetch zero-sized (placeholder) registers. */
552 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
557 /* Define the g/G packet format as the contents of each register
558 with a remote protocol number, in order of ascending protocol
561 remote_regs
= alloca (gdbarch_num_regs (gdbarch
)
562 * sizeof (struct packet_reg
*));
563 for (num_remote_regs
= 0, regnum
= 0;
564 regnum
< gdbarch_num_regs (gdbarch
);
566 if (regs
[regnum
].pnum
!= -1)
567 remote_regs
[num_remote_regs
++] = ®s
[regnum
];
569 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
572 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
574 remote_regs
[regnum
]->in_g_packet
= 1;
575 remote_regs
[regnum
]->offset
= offset
;
576 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
582 /* Given the architecture described by GDBARCH, return the remote
583 protocol register's number and the register's offset in the g/G
584 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
585 If the target does not have a mapping for REGNUM, return false,
586 otherwise, return true. */
589 remote_register_number_and_offset (struct gdbarch
*gdbarch
, int regnum
,
590 int *pnum
, int *poffset
)
593 struct packet_reg
*regs
;
594 struct cleanup
*old_chain
;
596 gdb_assert (regnum
< gdbarch_num_regs (gdbarch
));
598 regs
= xcalloc (gdbarch_num_regs (gdbarch
), sizeof (struct packet_reg
));
599 old_chain
= make_cleanup (xfree
, regs
);
601 sizeof_g_packet
= map_regcache_remote_table (gdbarch
, regs
);
603 *pnum
= regs
[regnum
].pnum
;
604 *poffset
= regs
[regnum
].offset
;
606 do_cleanups (old_chain
);
612 init_remote_state (struct gdbarch
*gdbarch
)
614 struct remote_state
*rs
= get_remote_state_raw ();
615 struct remote_arch_state
*rsa
;
617 rsa
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_arch_state
);
619 /* Use the architecture to build a regnum<->pnum table, which will be
620 1:1 unless a feature set specifies otherwise. */
621 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
,
622 gdbarch_num_regs (gdbarch
),
625 /* Record the maximum possible size of the g packet - it may turn out
627 rsa
->sizeof_g_packet
= map_regcache_remote_table (gdbarch
, rsa
->regs
);
629 /* Default maximum number of characters in a packet body. Many
630 remote stubs have a hardwired buffer size of 400 bytes
631 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
632 as the maximum packet-size to ensure that the packet and an extra
633 NUL character can always fit in the buffer. This stops GDB
634 trashing stubs that try to squeeze an extra NUL into what is
635 already a full buffer (As of 1999-12-04 that was most stubs). */
636 rsa
->remote_packet_size
= 400 - 1;
638 /* This one is filled in when a ``g'' packet is received. */
639 rsa
->actual_register_packet_size
= 0;
641 /* Should rsa->sizeof_g_packet needs more space than the
642 default, adjust the size accordingly. Remember that each byte is
643 encoded as two characters. 32 is the overhead for the packet
644 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
645 (``$NN:G...#NN'') is a better guess, the below has been padded a
647 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
648 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
650 /* Make sure that the packet buffer is plenty big enough for
651 this architecture. */
652 if (rs
->buf_size
< rsa
->remote_packet_size
)
654 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
655 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
661 /* Return the current allowed size of a remote packet. This is
662 inferred from the current architecture, and should be used to
663 limit the length of outgoing packets. */
665 get_remote_packet_size (void)
667 struct remote_state
*rs
= get_remote_state ();
668 struct remote_arch_state
*rsa
= get_remote_arch_state ();
670 if (rs
->explicit_packet_size
)
671 return rs
->explicit_packet_size
;
673 return rsa
->remote_packet_size
;
676 static struct packet_reg
*
677 packet_reg_from_regnum (struct remote_arch_state
*rsa
, long regnum
)
679 if (regnum
< 0 && regnum
>= gdbarch_num_regs (target_gdbarch
))
683 struct packet_reg
*r
= &rsa
->regs
[regnum
];
685 gdb_assert (r
->regnum
== regnum
);
690 static struct packet_reg
*
691 packet_reg_from_pnum (struct remote_arch_state
*rsa
, LONGEST pnum
)
695 for (i
= 0; i
< gdbarch_num_regs (target_gdbarch
); i
++)
697 struct packet_reg
*r
= &rsa
->regs
[i
];
705 /* FIXME: graces/2002-08-08: These variables should eventually be
706 bound to an instance of the target object (as in gdbarch-tdep()),
707 when such a thing exists. */
709 /* This is set to the data address of the access causing the target
710 to stop for a watchpoint. */
711 static CORE_ADDR remote_watch_data_address
;
713 /* This is non-zero if target stopped for a watchpoint. */
714 static int remote_stopped_by_watchpoint_p
;
716 static struct target_ops remote_ops
;
718 static struct target_ops extended_remote_ops
;
720 static int remote_async_mask_value
= 1;
722 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
723 ``forever'' still use the normal timeout mechanism. This is
724 currently used by the ASYNC code to guarentee that target reads
725 during the initial connect always time-out. Once getpkt has been
726 modified to return a timeout indication and, in turn
727 remote_wait()/wait_for_inferior() have gained a timeout parameter
729 static int wait_forever_enabled_p
= 1;
731 /* Allow the user to specify what sequence to send to the remote
732 when he requests a program interruption: Although ^C is usually
733 what remote systems expect (this is the default, here), it is
734 sometimes preferable to send a break. On other systems such
735 as the Linux kernel, a break followed by g, which is Magic SysRq g
736 is required in order to interrupt the execution. */
737 const char interrupt_sequence_control_c
[] = "Ctrl-C";
738 const char interrupt_sequence_break
[] = "BREAK";
739 const char interrupt_sequence_break_g
[] = "BREAK-g";
740 static const char *interrupt_sequence_modes
[] =
742 interrupt_sequence_control_c
,
743 interrupt_sequence_break
,
744 interrupt_sequence_break_g
,
747 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
750 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
751 struct cmd_list_element
*c
,
754 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
755 fprintf_filtered (file
,
756 _("Send the ASCII ETX character (Ctrl-c) "
757 "to the remote target to interrupt the "
758 "execution of the program.\n"));
759 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
760 fprintf_filtered (file
,
761 _("send a break signal to the remote target "
762 "to interrupt the execution of the program.\n"));
763 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
764 fprintf_filtered (file
,
765 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
766 "the remote target to interrupt the execution "
767 "of Linux kernel.\n"));
769 internal_error (__FILE__
, __LINE__
,
770 _("Invalid value for interrupt_sequence_mode: %s."),
771 interrupt_sequence_mode
);
774 /* This boolean variable specifies whether interrupt_sequence is sent
775 to the remote target when gdb connects to it.
776 This is mostly needed when you debug the Linux kernel: The Linux kernel
777 expects BREAK g which is Magic SysRq g for connecting gdb. */
778 static int interrupt_on_connect
= 0;
780 /* This variable is used to implement the "set/show remotebreak" commands.
781 Since these commands are now deprecated in favor of "set/show remote
782 interrupt-sequence", it no longer has any effect on the code. */
783 static int remote_break
;
786 set_remotebreak (char *args
, int from_tty
, struct cmd_list_element
*c
)
789 interrupt_sequence_mode
= interrupt_sequence_break
;
791 interrupt_sequence_mode
= interrupt_sequence_control_c
;
795 show_remotebreak (struct ui_file
*file
, int from_tty
,
796 struct cmd_list_element
*c
,
801 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
802 remote_open knows that we don't have a file open when the program
804 static struct serial
*remote_desc
= NULL
;
806 /* This variable sets the number of bits in an address that are to be
807 sent in a memory ("M" or "m") packet. Normally, after stripping
808 leading zeros, the entire address would be sent. This variable
809 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
810 initial implementation of remote.c restricted the address sent in
811 memory packets to ``host::sizeof long'' bytes - (typically 32
812 bits). Consequently, for 64 bit targets, the upper 32 bits of an
813 address was never sent. Since fixing this bug may cause a break in
814 some remote targets this variable is principly provided to
815 facilitate backward compatibility. */
817 static int remote_address_size
;
819 /* Temporary to track who currently owns the terminal. See
820 remote_terminal_* for more details. */
822 static int remote_async_terminal_ours_p
;
824 /* The executable file to use for "run" on the remote side. */
826 static char *remote_exec_file
= "";
829 /* User configurable variables for the number of characters in a
830 memory read/write packet. MIN (rsa->remote_packet_size,
831 rsa->sizeof_g_packet) is the default. Some targets need smaller
832 values (fifo overruns, et.al.) and some users need larger values
833 (speed up transfers). The variables ``preferred_*'' (the user
834 request), ``current_*'' (what was actually set) and ``forced_*''
835 (Positive - a soft limit, negative - a hard limit). */
837 struct memory_packet_config
844 /* Compute the current size of a read/write packet. Since this makes
845 use of ``actual_register_packet_size'' the computation is dynamic. */
848 get_memory_packet_size (struct memory_packet_config
*config
)
850 struct remote_state
*rs
= get_remote_state ();
851 struct remote_arch_state
*rsa
= get_remote_arch_state ();
853 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
854 law?) that some hosts don't cope very well with large alloca()
855 calls. Eventually the alloca() code will be replaced by calls to
856 xmalloc() and make_cleanups() allowing this restriction to either
857 be lifted or removed. */
858 #ifndef MAX_REMOTE_PACKET_SIZE
859 #define MAX_REMOTE_PACKET_SIZE 16384
861 /* NOTE: 20 ensures we can write at least one byte. */
862 #ifndef MIN_REMOTE_PACKET_SIZE
863 #define MIN_REMOTE_PACKET_SIZE 20
868 if (config
->size
<= 0)
869 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
871 what_they_get
= config
->size
;
875 what_they_get
= get_remote_packet_size ();
876 /* Limit the packet to the size specified by the user. */
878 && what_they_get
> config
->size
)
879 what_they_get
= config
->size
;
881 /* Limit it to the size of the targets ``g'' response unless we have
882 permission from the stub to use a larger packet size. */
883 if (rs
->explicit_packet_size
== 0
884 && rsa
->actual_register_packet_size
> 0
885 && what_they_get
> rsa
->actual_register_packet_size
)
886 what_they_get
= rsa
->actual_register_packet_size
;
888 if (what_they_get
> MAX_REMOTE_PACKET_SIZE
)
889 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
890 if (what_they_get
< MIN_REMOTE_PACKET_SIZE
)
891 what_they_get
= MIN_REMOTE_PACKET_SIZE
;
893 /* Make sure there is room in the global buffer for this packet
894 (including its trailing NUL byte). */
895 if (rs
->buf_size
< what_they_get
+ 1)
897 rs
->buf_size
= 2 * what_they_get
;
898 rs
->buf
= xrealloc (rs
->buf
, 2 * what_they_get
);
901 return what_they_get
;
904 /* Update the size of a read/write packet. If they user wants
905 something really big then do a sanity check. */
908 set_memory_packet_size (char *args
, struct memory_packet_config
*config
)
910 int fixed_p
= config
->fixed_p
;
911 long size
= config
->size
;
914 error (_("Argument required (integer, `fixed' or `limited')."));
915 else if (strcmp (args
, "hard") == 0
916 || strcmp (args
, "fixed") == 0)
918 else if (strcmp (args
, "soft") == 0
919 || strcmp (args
, "limit") == 0)
925 size
= strtoul (args
, &end
, 0);
927 error (_("Invalid %s (bad syntax)."), config
->name
);
929 /* Instead of explicitly capping the size of a packet to
930 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
931 instead allowed to set the size to something arbitrarily
933 if (size
> MAX_REMOTE_PACKET_SIZE
)
934 error (_("Invalid %s (too large)."), config
->name
);
938 if (fixed_p
&& !config
->fixed_p
)
940 if (! query (_("The target may not be able to correctly handle a %s\n"
941 "of %ld bytes. Change the packet size? "),
943 error (_("Packet size not changed."));
945 /* Update the config. */
946 config
->fixed_p
= fixed_p
;
951 show_memory_packet_size (struct memory_packet_config
*config
)
953 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
955 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
956 get_memory_packet_size (config
));
958 printf_filtered (_("Packets are limited to %ld bytes.\n"),
959 get_memory_packet_size (config
));
962 static struct memory_packet_config memory_write_packet_config
=
964 "memory-write-packet-size",
968 set_memory_write_packet_size (char *args
, int from_tty
)
970 set_memory_packet_size (args
, &memory_write_packet_config
);
974 show_memory_write_packet_size (char *args
, int from_tty
)
976 show_memory_packet_size (&memory_write_packet_config
);
980 get_memory_write_packet_size (void)
982 return get_memory_packet_size (&memory_write_packet_config
);
985 static struct memory_packet_config memory_read_packet_config
=
987 "memory-read-packet-size",
991 set_memory_read_packet_size (char *args
, int from_tty
)
993 set_memory_packet_size (args
, &memory_read_packet_config
);
997 show_memory_read_packet_size (char *args
, int from_tty
)
999 show_memory_packet_size (&memory_read_packet_config
);
1003 get_memory_read_packet_size (void)
1005 long size
= get_memory_packet_size (&memory_read_packet_config
);
1007 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1008 extra buffer size argument before the memory read size can be
1009 increased beyond this. */
1010 if (size
> get_remote_packet_size ())
1011 size
= get_remote_packet_size ();
1016 /* Generic configuration support for packets the stub optionally
1017 supports. Allows the user to specify the use of the packet as well
1018 as allowing GDB to auto-detect support in the remote stub. */
1022 PACKET_SUPPORT_UNKNOWN
= 0,
1027 struct packet_config
1031 enum auto_boolean detect
;
1032 enum packet_support support
;
1035 /* Analyze a packet's return value and update the packet config
1046 update_packet_config (struct packet_config
*config
)
1048 switch (config
->detect
)
1050 case AUTO_BOOLEAN_TRUE
:
1051 config
->support
= PACKET_ENABLE
;
1053 case AUTO_BOOLEAN_FALSE
:
1054 config
->support
= PACKET_DISABLE
;
1056 case AUTO_BOOLEAN_AUTO
:
1057 config
->support
= PACKET_SUPPORT_UNKNOWN
;
1063 show_packet_config_cmd (struct packet_config
*config
)
1065 char *support
= "internal-error";
1067 switch (config
->support
)
1070 support
= "enabled";
1072 case PACKET_DISABLE
:
1073 support
= "disabled";
1075 case PACKET_SUPPORT_UNKNOWN
:
1076 support
= "unknown";
1079 switch (config
->detect
)
1081 case AUTO_BOOLEAN_AUTO
:
1082 printf_filtered (_("Support for the `%s' packet "
1083 "is auto-detected, currently %s.\n"),
1084 config
->name
, support
);
1086 case AUTO_BOOLEAN_TRUE
:
1087 case AUTO_BOOLEAN_FALSE
:
1088 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1089 config
->name
, support
);
1095 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1096 const char *title
, int legacy
)
1102 config
->name
= name
;
1103 config
->title
= title
;
1104 config
->detect
= AUTO_BOOLEAN_AUTO
;
1105 config
->support
= PACKET_SUPPORT_UNKNOWN
;
1106 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1108 show_doc
= xstrprintf ("Show current use of remote "
1109 "protocol `%s' (%s) packet",
1111 /* set/show TITLE-packet {auto,on,off} */
1112 cmd_name
= xstrprintf ("%s-packet", title
);
1113 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1114 &config
->detect
, set_doc
,
1115 show_doc
, NULL
, /* help_doc */
1116 set_remote_protocol_packet_cmd
,
1117 show_remote_protocol_packet_cmd
,
1118 &remote_set_cmdlist
, &remote_show_cmdlist
);
1119 /* The command code copies the documentation strings. */
1122 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1127 legacy_name
= xstrprintf ("%s-packet", name
);
1128 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1129 &remote_set_cmdlist
);
1130 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1131 &remote_show_cmdlist
);
1135 static enum packet_result
1136 packet_check_result (const char *buf
)
1140 /* The stub recognized the packet request. Check that the
1141 operation succeeded. */
1143 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1145 /* "Enn" - definitly an error. */
1146 return PACKET_ERROR
;
1148 /* Always treat "E." as an error. This will be used for
1149 more verbose error messages, such as E.memtypes. */
1150 if (buf
[0] == 'E' && buf
[1] == '.')
1151 return PACKET_ERROR
;
1153 /* The packet may or may not be OK. Just assume it is. */
1157 /* The stub does not support the packet. */
1158 return PACKET_UNKNOWN
;
1161 static enum packet_result
1162 packet_ok (const char *buf
, struct packet_config
*config
)
1164 enum packet_result result
;
1166 result
= packet_check_result (buf
);
1171 /* The stub recognized the packet request. */
1172 switch (config
->support
)
1174 case PACKET_SUPPORT_UNKNOWN
:
1176 fprintf_unfiltered (gdb_stdlog
,
1177 "Packet %s (%s) is supported\n",
1178 config
->name
, config
->title
);
1179 config
->support
= PACKET_ENABLE
;
1181 case PACKET_DISABLE
:
1182 internal_error (__FILE__
, __LINE__
,
1183 _("packet_ok: attempt to use a disabled packet"));
1189 case PACKET_UNKNOWN
:
1190 /* The stub does not support the packet. */
1191 switch (config
->support
)
1194 if (config
->detect
== AUTO_BOOLEAN_AUTO
)
1195 /* If the stub previously indicated that the packet was
1196 supported then there is a protocol error.. */
1197 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1198 config
->name
, config
->title
);
1200 /* The user set it wrong. */
1201 error (_("Enabled packet %s (%s) not recognized by stub"),
1202 config
->name
, config
->title
);
1204 case PACKET_SUPPORT_UNKNOWN
:
1206 fprintf_unfiltered (gdb_stdlog
,
1207 "Packet %s (%s) is NOT supported\n",
1208 config
->name
, config
->title
);
1209 config
->support
= PACKET_DISABLE
;
1211 case PACKET_DISABLE
:
1233 PACKET_vFile_pwrite
,
1235 PACKET_vFile_unlink
,
1237 PACKET_qXfer_features
,
1238 PACKET_qXfer_libraries
,
1239 PACKET_qXfer_memory_map
,
1240 PACKET_qXfer_spu_read
,
1241 PACKET_qXfer_spu_write
,
1242 PACKET_qXfer_osdata
,
1243 PACKET_qXfer_threads
,
1244 PACKET_qXfer_statictrace_read
,
1245 PACKET_qXfer_traceframe_info
,
1249 PACKET_QPassSignals
,
1250 PACKET_qSearch_memory
,
1253 PACKET_QStartNoAckMode
,
1255 PACKET_qXfer_siginfo_read
,
1256 PACKET_qXfer_siginfo_write
,
1258 PACKET_ConditionalTracepoints
,
1259 PACKET_FastTracepoints
,
1260 PACKET_StaticTracepoints
,
1263 PACKET_TracepointSource
,
1268 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
1271 set_remote_protocol_packet_cmd (char *args
, int from_tty
,
1272 struct cmd_list_element
*c
)
1274 struct packet_config
*packet
;
1276 for (packet
= remote_protocol_packets
;
1277 packet
< &remote_protocol_packets
[PACKET_MAX
];
1280 if (&packet
->detect
== c
->var
)
1282 update_packet_config (packet
);
1286 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
1291 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
1292 struct cmd_list_element
*c
,
1295 struct packet_config
*packet
;
1297 for (packet
= remote_protocol_packets
;
1298 packet
< &remote_protocol_packets
[PACKET_MAX
];
1301 if (&packet
->detect
== c
->var
)
1303 show_packet_config_cmd (packet
);
1307 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
1311 /* Should we try one of the 'Z' requests? */
1315 Z_PACKET_SOFTWARE_BP
,
1316 Z_PACKET_HARDWARE_BP
,
1323 /* For compatibility with older distributions. Provide a ``set remote
1324 Z-packet ...'' command that updates all the Z packet types. */
1326 static enum auto_boolean remote_Z_packet_detect
;
1329 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
1330 struct cmd_list_element
*c
)
1334 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1336 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
1337 update_packet_config (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1342 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
1343 struct cmd_list_element
*c
,
1348 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1350 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1354 /* Should we try the 'ThreadInfo' query packet?
1356 This variable (NOT available to the user: auto-detect only!)
1357 determines whether GDB will use the new, simpler "ThreadInfo"
1358 query or the older, more complex syntax for thread queries.
1359 This is an auto-detect variable (set to true at each connect,
1360 and set to false when the target fails to recognize it). */
1362 static int use_threadinfo_query
;
1363 static int use_threadextra_query
;
1365 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1366 static struct async_signal_handler
*sigint_remote_twice_token
;
1367 static struct async_signal_handler
*sigint_remote_token
;
1370 /* Asynchronous signal handle registered as event loop source for
1371 when we have pending events ready to be passed to the core. */
1373 static struct async_event_handler
*remote_async_inferior_event_token
;
1375 /* Asynchronous signal handle registered as event loop source for when
1376 the remote sent us a %Stop notification. The registered callback
1377 will do a vStopped sequence to pull the rest of the events out of
1378 the remote side into our event queue. */
1380 static struct async_event_handler
*remote_async_get_pending_events_token
;
1383 static ptid_t magic_null_ptid
;
1384 static ptid_t not_sent_ptid
;
1385 static ptid_t any_thread_ptid
;
1387 /* These are the threads which we last sent to the remote system. The
1388 TID member will be -1 for all or -2 for not sent yet. */
1390 static ptid_t general_thread
;
1391 static ptid_t continue_thread
;
1393 /* This the traceframe which we last selected on the remote system.
1394 It will be -1 if no traceframe is selected. */
1395 static int remote_traceframe_number
= -1;
1397 /* Find out if the stub attached to PID (and hence GDB should offer to
1398 detach instead of killing it when bailing out). */
1401 remote_query_attached (int pid
)
1403 struct remote_state
*rs
= get_remote_state ();
1405 if (remote_protocol_packets
[PACKET_qAttached
].support
== PACKET_DISABLE
)
1408 if (remote_multi_process_p (rs
))
1409 sprintf (rs
->buf
, "qAttached:%x", pid
);
1411 sprintf (rs
->buf
, "qAttached");
1414 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1416 switch (packet_ok (rs
->buf
,
1417 &remote_protocol_packets
[PACKET_qAttached
]))
1420 if (strcmp (rs
->buf
, "1") == 0)
1424 warning (_("Remote failure reply: %s"), rs
->buf
);
1426 case PACKET_UNKNOWN
:
1433 /* Add PID to GDB's inferior table. Since we can be connected to a
1434 remote system before before knowing about any inferior, mark the
1435 target with execution when we find the first inferior. If ATTACHED
1436 is 1, then we had just attached to this inferior. If it is 0, then
1437 we just created this inferior. If it is -1, then try querying the
1438 remote stub to find out if it had attached to the inferior or
1441 static struct inferior
*
1442 remote_add_inferior (int pid
, int attached
)
1444 struct inferior
*inf
;
1446 /* Check whether this process we're learning about is to be
1447 considered attached, or if is to be considered to have been
1448 spawned by the stub. */
1450 attached
= remote_query_attached (pid
);
1452 if (gdbarch_has_global_solist (target_gdbarch
))
1454 /* If the target shares code across all inferiors, then every
1455 attach adds a new inferior. */
1456 inf
= add_inferior (pid
);
1458 /* ... and every inferior is bound to the same program space.
1459 However, each inferior may still have its own address
1461 inf
->aspace
= maybe_new_address_space ();
1462 inf
->pspace
= current_program_space
;
1466 /* In the traditional debugging scenario, there's a 1-1 match
1467 between program/address spaces. We simply bind the inferior
1468 to the program space's address space. */
1469 inf
= current_inferior ();
1470 inferior_appeared (inf
, pid
);
1473 inf
->attach_flag
= attached
;
1478 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1479 according to RUNNING. */
1482 remote_add_thread (ptid_t ptid
, int running
)
1486 set_executing (ptid
, running
);
1487 set_running (ptid
, running
);
1490 /* Come here when we learn about a thread id from the remote target.
1491 It may be the first time we hear about such thread, so take the
1492 opportunity to add it to GDB's thread list. In case this is the
1493 first time we're noticing its corresponding inferior, add it to
1494 GDB's inferior list as well. */
1497 remote_notice_new_inferior (ptid_t currthread
, int running
)
1499 /* If this is a new thread, add it to GDB's thread list.
1500 If we leave it up to WFI to do this, bad things will happen. */
1502 if (in_thread_list (currthread
) && is_exited (currthread
))
1504 /* We're seeing an event on a thread id we knew had exited.
1505 This has to be a new thread reusing the old id. Add it. */
1506 remote_add_thread (currthread
, running
);
1510 if (!in_thread_list (currthread
))
1512 struct inferior
*inf
= NULL
;
1513 int pid
= ptid_get_pid (currthread
);
1515 if (ptid_is_pid (inferior_ptid
)
1516 && pid
== ptid_get_pid (inferior_ptid
))
1518 /* inferior_ptid has no thread member yet. This can happen
1519 with the vAttach -> remote_wait,"TAAthread:" path if the
1520 stub doesn't support qC. This is the first stop reported
1521 after an attach, so this is the main thread. Update the
1522 ptid in the thread list. */
1523 if (in_thread_list (pid_to_ptid (pid
)))
1524 thread_change_ptid (inferior_ptid
, currthread
);
1527 remote_add_thread (currthread
, running
);
1528 inferior_ptid
= currthread
;
1533 if (ptid_equal (magic_null_ptid
, inferior_ptid
))
1535 /* inferior_ptid is not set yet. This can happen with the
1536 vRun -> remote_wait,"TAAthread:" path if the stub
1537 doesn't support qC. This is the first stop reported
1538 after an attach, so this is the main thread. Update the
1539 ptid in the thread list. */
1540 thread_change_ptid (inferior_ptid
, currthread
);
1544 /* When connecting to a target remote, or to a target
1545 extended-remote which already was debugging an inferior, we
1546 may not know about it yet. Add it before adding its child
1547 thread, so notifications are emitted in a sensible order. */
1548 if (!in_inferior_list (ptid_get_pid (currthread
)))
1549 inf
= remote_add_inferior (ptid_get_pid (currthread
), -1);
1551 /* This is really a new thread. Add it. */
1552 remote_add_thread (currthread
, running
);
1554 /* If we found a new inferior, let the common code do whatever
1555 it needs to with it (e.g., read shared libraries, insert
1558 notice_new_inferior (currthread
, running
, 0);
1562 /* Return the private thread data, creating it if necessary. */
1564 struct private_thread_info
*
1565 demand_private_info (ptid_t ptid
)
1567 struct thread_info
*info
= find_thread_ptid (ptid
);
1573 info
->private = xmalloc (sizeof (*(info
->private)));
1574 info
->private_dtor
= free_private_thread_info
;
1575 info
->private->core
= -1;
1576 info
->private->extra
= 0;
1579 return info
->private;
1582 /* Call this function as a result of
1583 1) A halt indication (T packet) containing a thread id
1584 2) A direct query of currthread
1585 3) Successful execution of set thread */
1588 record_currthread (ptid_t currthread
)
1590 general_thread
= currthread
;
1593 static char *last_pass_packet
;
1595 /* If 'QPassSignals' is supported, tell the remote stub what signals
1596 it can simply pass through to the inferior without reporting. */
1599 remote_pass_signals (int numsigs
, unsigned char *pass_signals
)
1601 if (remote_protocol_packets
[PACKET_QPassSignals
].support
!= PACKET_DISABLE
)
1603 char *pass_packet
, *p
;
1606 gdb_assert (numsigs
< 256);
1607 for (i
= 0; i
< numsigs
; i
++)
1609 if (pass_signals
[i
])
1612 pass_packet
= xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
1613 strcpy (pass_packet
, "QPassSignals:");
1614 p
= pass_packet
+ strlen (pass_packet
);
1615 for (i
= 0; i
< numsigs
; i
++)
1617 if (pass_signals
[i
])
1620 *p
++ = tohex (i
>> 4);
1621 *p
++ = tohex (i
& 15);
1630 if (!last_pass_packet
|| strcmp (last_pass_packet
, pass_packet
))
1632 struct remote_state
*rs
= get_remote_state ();
1633 char *buf
= rs
->buf
;
1635 putpkt (pass_packet
);
1636 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1637 packet_ok (buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
1638 if (last_pass_packet
)
1639 xfree (last_pass_packet
);
1640 last_pass_packet
= pass_packet
;
1643 xfree (pass_packet
);
1647 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
1648 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
1649 thread. If GEN is set, set the general thread, if not, then set
1650 the step/continue thread. */
1652 set_thread (struct ptid ptid
, int gen
)
1654 struct remote_state
*rs
= get_remote_state ();
1655 ptid_t state
= gen
? general_thread
: continue_thread
;
1656 char *buf
= rs
->buf
;
1657 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
1659 if (ptid_equal (state
, ptid
))
1663 *buf
++ = gen
? 'g' : 'c';
1664 if (ptid_equal (ptid
, magic_null_ptid
))
1665 xsnprintf (buf
, endbuf
- buf
, "0");
1666 else if (ptid_equal (ptid
, any_thread_ptid
))
1667 xsnprintf (buf
, endbuf
- buf
, "0");
1668 else if (ptid_equal (ptid
, minus_one_ptid
))
1669 xsnprintf (buf
, endbuf
- buf
, "-1");
1671 write_ptid (buf
, endbuf
, ptid
);
1673 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1675 general_thread
= ptid
;
1677 continue_thread
= ptid
;
1681 set_general_thread (struct ptid ptid
)
1683 set_thread (ptid
, 1);
1687 set_continue_thread (struct ptid ptid
)
1689 set_thread (ptid
, 0);
1692 /* Change the remote current process. Which thread within the process
1693 ends up selected isn't important, as long as it is the same process
1694 as what INFERIOR_PTID points to.
1696 This comes from that fact that there is no explicit notion of
1697 "selected process" in the protocol. The selected process for
1698 general operations is the process the selected general thread
1702 set_general_process (void)
1704 struct remote_state
*rs
= get_remote_state ();
1706 /* If the remote can't handle multiple processes, don't bother. */
1707 if (!remote_multi_process_p (rs
))
1710 /* We only need to change the remote current thread if it's pointing
1711 at some other process. */
1712 if (ptid_get_pid (general_thread
) != ptid_get_pid (inferior_ptid
))
1713 set_general_thread (inferior_ptid
);
1717 /* Return nonzero if the thread PTID is still alive on the remote
1721 remote_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
1723 struct remote_state
*rs
= get_remote_state ();
1726 if (ptid_equal (ptid
, magic_null_ptid
))
1727 /* The main thread is always alive. */
1730 if (ptid_get_pid (ptid
) != 0 && ptid_get_tid (ptid
) == 0)
1731 /* The main thread is always alive. This can happen after a
1732 vAttach, if the remote side doesn't support
1737 endp
= rs
->buf
+ get_remote_packet_size ();
1740 write_ptid (p
, endp
, ptid
);
1743 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1744 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
1747 /* About these extended threadlist and threadinfo packets. They are
1748 variable length packets but, the fields within them are often fixed
1749 length. They are redundent enough to send over UDP as is the
1750 remote protocol in general. There is a matching unit test module
1753 #define OPAQUETHREADBYTES 8
1755 /* a 64 bit opaque identifier */
1756 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
1758 /* WARNING: This threadref data structure comes from the remote O.S.,
1759 libstub protocol encoding, and remote.c. It is not particularly
1762 /* Right now, the internal structure is int. We want it to be bigger.
1763 Plan to fix this. */
1765 typedef int gdb_threadref
; /* Internal GDB thread reference. */
1767 /* gdb_ext_thread_info is an internal GDB data structure which is
1768 equivalent to the reply of the remote threadinfo packet. */
1770 struct gdb_ext_thread_info
1772 threadref threadid
; /* External form of thread reference. */
1773 int active
; /* Has state interesting to GDB?
1775 char display
[256]; /* Brief state display, name,
1776 blocked/suspended. */
1777 char shortname
[32]; /* To be used to name threads. */
1778 char more_display
[256]; /* Long info, statistics, queue depth,
1782 /* The volume of remote transfers can be limited by submitting
1783 a mask containing bits specifying the desired information.
1784 Use a union of these values as the 'selection' parameter to
1785 get_thread_info. FIXME: Make these TAG names more thread specific. */
1787 #define TAG_THREADID 1
1788 #define TAG_EXISTS 2
1789 #define TAG_DISPLAY 4
1790 #define TAG_THREADNAME 8
1791 #define TAG_MOREDISPLAY 16
1793 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1795 char *unpack_varlen_hex (char *buff
, ULONGEST
*result
);
1797 static char *unpack_nibble (char *buf
, int *val
);
1799 static char *pack_nibble (char *buf
, int nibble
);
1801 static char *pack_hex_byte (char *pkt
, int /* unsigned char */ byte
);
1803 static char *unpack_byte (char *buf
, int *value
);
1805 static char *pack_int (char *buf
, int value
);
1807 static char *unpack_int (char *buf
, int *value
);
1809 static char *unpack_string (char *src
, char *dest
, int length
);
1811 static char *pack_threadid (char *pkt
, threadref
*id
);
1813 static char *unpack_threadid (char *inbuf
, threadref
*id
);
1815 void int_to_threadref (threadref
*id
, int value
);
1817 static int threadref_to_int (threadref
*ref
);
1819 static void copy_threadref (threadref
*dest
, threadref
*src
);
1821 static int threadmatch (threadref
*dest
, threadref
*src
);
1823 static char *pack_threadinfo_request (char *pkt
, int mode
,
1826 static int remote_unpack_thread_info_response (char *pkt
,
1827 threadref
*expectedref
,
1828 struct gdb_ext_thread_info
1832 static int remote_get_threadinfo (threadref
*threadid
,
1833 int fieldset
, /*TAG mask */
1834 struct gdb_ext_thread_info
*info
);
1836 static char *pack_threadlist_request (char *pkt
, int startflag
,
1838 threadref
*nextthread
);
1840 static int parse_threadlist_response (char *pkt
,
1842 threadref
*original_echo
,
1843 threadref
*resultlist
,
1846 static int remote_get_threadlist (int startflag
,
1847 threadref
*nextthread
,
1851 threadref
*threadlist
);
1853 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
1855 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
1856 void *context
, int looplimit
);
1858 static int remote_newthread_step (threadref
*ref
, void *context
);
1861 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
1862 buffer we're allowed to write to. Returns
1863 BUF+CHARACTERS_WRITTEN. */
1866 write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
1869 struct remote_state
*rs
= get_remote_state ();
1871 if (remote_multi_process_p (rs
))
1873 pid
= ptid_get_pid (ptid
);
1875 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
1877 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
1879 tid
= ptid_get_tid (ptid
);
1881 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
1883 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
1888 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
1889 passed the last parsed char. Returns null_ptid on error. */
1892 read_ptid (char *buf
, char **obuf
)
1896 ULONGEST pid
= 0, tid
= 0;
1900 /* Multi-process ptid. */
1901 pp
= unpack_varlen_hex (p
+ 1, &pid
);
1903 error (_("invalid remote ptid: %s"), p
);
1906 pp
= unpack_varlen_hex (p
+ 1, &tid
);
1909 return ptid_build (pid
, 0, tid
);
1912 /* No multi-process. Just a tid. */
1913 pp
= unpack_varlen_hex (p
, &tid
);
1915 /* Since the stub is not sending a process id, then default to
1916 what's in inferior_ptid, unless it's null at this point. If so,
1917 then since there's no way to know the pid of the reported
1918 threads, use the magic number. */
1919 if (ptid_equal (inferior_ptid
, null_ptid
))
1920 pid
= ptid_get_pid (magic_null_ptid
);
1922 pid
= ptid_get_pid (inferior_ptid
);
1926 return ptid_build (pid
, 0, tid
);
1929 /* Encode 64 bits in 16 chars of hex. */
1931 static const char hexchars
[] = "0123456789abcdef";
1934 ishex (int ch
, int *val
)
1936 if ((ch
>= 'a') && (ch
<= 'f'))
1938 *val
= ch
- 'a' + 10;
1941 if ((ch
>= 'A') && (ch
<= 'F'))
1943 *val
= ch
- 'A' + 10;
1946 if ((ch
>= '0') && (ch
<= '9'))
1957 if (ch
>= 'a' && ch
<= 'f')
1958 return ch
- 'a' + 10;
1959 if (ch
>= '0' && ch
<= '9')
1961 if (ch
>= 'A' && ch
<= 'F')
1962 return ch
- 'A' + 10;
1967 stub_unpack_int (char *buff
, int fieldlength
)
1974 nibble
= stubhex (*buff
++);
1978 retval
= retval
<< 4;
1984 unpack_varlen_hex (char *buff
, /* packet to parse */
1988 ULONGEST retval
= 0;
1990 while (ishex (*buff
, &nibble
))
1993 retval
= retval
<< 4;
1994 retval
|= nibble
& 0x0f;
2001 unpack_nibble (char *buf
, int *val
)
2003 *val
= fromhex (*buf
++);
2008 pack_nibble (char *buf
, int nibble
)
2010 *buf
++ = hexchars
[(nibble
& 0x0f)];
2015 pack_hex_byte (char *pkt
, int byte
)
2017 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
2018 *pkt
++ = hexchars
[(byte
& 0xf)];
2023 unpack_byte (char *buf
, int *value
)
2025 *value
= stub_unpack_int (buf
, 2);
2030 pack_int (char *buf
, int value
)
2032 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
2033 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
2034 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
2035 buf
= pack_hex_byte (buf
, (value
& 0xff));
2040 unpack_int (char *buf
, int *value
)
2042 *value
= stub_unpack_int (buf
, 8);
2046 #if 0 /* Currently unused, uncomment when needed. */
2047 static char *pack_string (char *pkt
, char *string
);
2050 pack_string (char *pkt
, char *string
)
2055 len
= strlen (string
);
2057 len
= 200; /* Bigger than most GDB packets, junk??? */
2058 pkt
= pack_hex_byte (pkt
, len
);
2062 if ((ch
== '\0') || (ch
== '#'))
2063 ch
= '*'; /* Protect encapsulation. */
2068 #endif /* 0 (unused) */
2071 unpack_string (char *src
, char *dest
, int length
)
2080 pack_threadid (char *pkt
, threadref
*id
)
2083 unsigned char *altid
;
2085 altid
= (unsigned char *) id
;
2086 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
2088 pkt
= pack_hex_byte (pkt
, *altid
++);
2094 unpack_threadid (char *inbuf
, threadref
*id
)
2097 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
2100 altref
= (char *) id
;
2102 while (inbuf
< limit
)
2104 x
= stubhex (*inbuf
++);
2105 y
= stubhex (*inbuf
++);
2106 *altref
++ = (x
<< 4) | y
;
2111 /* Externally, threadrefs are 64 bits but internally, they are still
2112 ints. This is due to a mismatch of specifications. We would like
2113 to use 64bit thread references internally. This is an adapter
2117 int_to_threadref (threadref
*id
, int value
)
2119 unsigned char *scan
;
2121 scan
= (unsigned char *) id
;
2127 *scan
++ = (value
>> 24) & 0xff;
2128 *scan
++ = (value
>> 16) & 0xff;
2129 *scan
++ = (value
>> 8) & 0xff;
2130 *scan
++ = (value
& 0xff);
2134 threadref_to_int (threadref
*ref
)
2137 unsigned char *scan
;
2143 value
= (value
<< 8) | ((*scan
++) & 0xff);
2148 copy_threadref (threadref
*dest
, threadref
*src
)
2151 unsigned char *csrc
, *cdest
;
2153 csrc
= (unsigned char *) src
;
2154 cdest
= (unsigned char *) dest
;
2161 threadmatch (threadref
*dest
, threadref
*src
)
2163 /* Things are broken right now, so just assume we got a match. */
2165 unsigned char *srcp
, *destp
;
2167 srcp
= (char *) src
;
2168 destp
= (char *) dest
;
2172 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
2179 threadid:1, # always request threadid
2186 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2189 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
2191 *pkt
++ = 'q'; /* Info Query */
2192 *pkt
++ = 'P'; /* process or thread info */
2193 pkt
= pack_int (pkt
, mode
); /* mode */
2194 pkt
= pack_threadid (pkt
, id
); /* threadid */
2195 *pkt
= '\0'; /* terminate */
2199 /* These values tag the fields in a thread info response packet. */
2200 /* Tagging the fields allows us to request specific fields and to
2201 add more fields as time goes by. */
2203 #define TAG_THREADID 1 /* Echo the thread identifier. */
2204 #define TAG_EXISTS 2 /* Is this process defined enough to
2205 fetch registers and its stack? */
2206 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2207 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2208 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2212 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
2213 struct gdb_ext_thread_info
*info
)
2215 struct remote_state
*rs
= get_remote_state ();
2219 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
2222 /* info->threadid = 0; FIXME: implement zero_threadref. */
2224 info
->display
[0] = '\0';
2225 info
->shortname
[0] = '\0';
2226 info
->more_display
[0] = '\0';
2228 /* Assume the characters indicating the packet type have been
2230 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
2231 pkt
= unpack_threadid (pkt
, &ref
);
2234 warning (_("Incomplete response to threadinfo request."));
2235 if (!threadmatch (&ref
, expectedref
))
2236 { /* This is an answer to a different request. */
2237 warning (_("ERROR RMT Thread info mismatch."));
2240 copy_threadref (&info
->threadid
, &ref
);
2242 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2244 /* Packets are terminated with nulls. */
2245 while ((pkt
< limit
) && mask
&& *pkt
)
2247 pkt
= unpack_int (pkt
, &tag
); /* tag */
2248 pkt
= unpack_byte (pkt
, &length
); /* length */
2249 if (!(tag
& mask
)) /* Tags out of synch with mask. */
2251 warning (_("ERROR RMT: threadinfo tag mismatch."));
2255 if (tag
== TAG_THREADID
)
2259 warning (_("ERROR RMT: length of threadid is not 16."));
2263 pkt
= unpack_threadid (pkt
, &ref
);
2264 mask
= mask
& ~TAG_THREADID
;
2267 if (tag
== TAG_EXISTS
)
2269 info
->active
= stub_unpack_int (pkt
, length
);
2271 mask
= mask
& ~(TAG_EXISTS
);
2274 warning (_("ERROR RMT: 'exists' length too long."));
2280 if (tag
== TAG_THREADNAME
)
2282 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
2283 mask
= mask
& ~TAG_THREADNAME
;
2286 if (tag
== TAG_DISPLAY
)
2288 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
2289 mask
= mask
& ~TAG_DISPLAY
;
2292 if (tag
== TAG_MOREDISPLAY
)
2294 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
2295 mask
= mask
& ~TAG_MOREDISPLAY
;
2298 warning (_("ERROR RMT: unknown thread info tag."));
2299 break; /* Not a tag we know about. */
2305 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
2306 struct gdb_ext_thread_info
*info
)
2308 struct remote_state
*rs
= get_remote_state ();
2311 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
2313 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2315 if (rs
->buf
[0] == '\0')
2318 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
2323 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2326 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
2327 threadref
*nextthread
)
2329 *pkt
++ = 'q'; /* info query packet */
2330 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
2331 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
2332 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
2333 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
2338 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2341 parse_threadlist_response (char *pkt
, int result_limit
,
2342 threadref
*original_echo
, threadref
*resultlist
,
2345 struct remote_state
*rs
= get_remote_state ();
2347 int count
, resultcount
, done
;
2350 /* Assume the 'q' and 'M chars have been stripped. */
2351 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
2352 /* done parse past here */
2353 pkt
= unpack_byte (pkt
, &count
); /* count field */
2354 pkt
= unpack_nibble (pkt
, &done
);
2355 /* The first threadid is the argument threadid. */
2356 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
2357 while ((count
-- > 0) && (pkt
< limit
))
2359 pkt
= unpack_threadid (pkt
, resultlist
++);
2360 if (resultcount
++ >= result_limit
)
2369 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
2370 int *done
, int *result_count
, threadref
*threadlist
)
2372 struct remote_state
*rs
= get_remote_state ();
2373 static threadref echo_nextthread
;
2376 /* Trancate result limit to be smaller than the packet size. */
2377 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
2378 >= get_remote_packet_size ())
2379 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
2381 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
2383 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2385 if (*rs
->buf
== '\0')
2389 parse_threadlist_response (rs
->buf
+ 2, result_limit
, &echo_nextthread
,
2392 if (!threadmatch (&echo_nextthread
, nextthread
))
2394 /* FIXME: This is a good reason to drop the packet. */
2395 /* Possably, there is a duplicate response. */
2397 retransmit immediatly - race conditions
2398 retransmit after timeout - yes
2400 wait for packet, then exit
2402 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2403 return 0; /* I choose simply exiting. */
2405 if (*result_count
<= 0)
2409 warning (_("RMT ERROR : failed to get remote thread list."));
2412 return result
; /* break; */
2414 if (*result_count
> result_limit
)
2417 warning (_("RMT ERROR: threadlist response longer than requested."));
2423 /* This is the interface between remote and threads, remotes upper
2426 /* remote_find_new_threads retrieves the thread list and for each
2427 thread in the list, looks up the thread in GDB's internal list,
2428 adding the thread if it does not already exist. This involves
2429 getting partial thread lists from the remote target so, polling the
2430 quit_flag is required. */
2433 /* About this many threadisds fit in a packet. */
2435 #define MAXTHREADLISTRESULTS 32
2438 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
2441 int done
, i
, result_count
;
2445 static threadref nextthread
;
2446 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
2451 if (loopcount
++ > looplimit
)
2454 warning (_("Remote fetch threadlist -infinite loop-."));
2457 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
2458 &done
, &result_count
, resultthreadlist
))
2463 /* Clear for later iterations. */
2465 /* Setup to resume next batch of thread references, set nextthread. */
2466 if (result_count
>= 1)
2467 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
2469 while (result_count
--)
2470 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
2477 remote_newthread_step (threadref
*ref
, void *context
)
2479 int pid
= ptid_get_pid (inferior_ptid
);
2480 ptid_t ptid
= ptid_build (pid
, 0, threadref_to_int (ref
));
2482 if (!in_thread_list (ptid
))
2484 return 1; /* continue iterator */
2487 #define CRAZY_MAX_THREADS 1000
2490 remote_current_thread (ptid_t oldpid
)
2492 struct remote_state
*rs
= get_remote_state ();
2495 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2496 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
2497 return read_ptid (&rs
->buf
[2], NULL
);
2502 /* Find new threads for info threads command.
2503 * Original version, using John Metzler's thread protocol.
2507 remote_find_new_threads (void)
2509 remote_threadlist_iterator (remote_newthread_step
, 0,
2513 #if defined(HAVE_LIBEXPAT)
2515 typedef struct thread_item
2521 DEF_VEC_O(thread_item_t
);
2523 struct threads_parsing_context
2525 VEC (thread_item_t
) *items
;
2529 start_thread (struct gdb_xml_parser
*parser
,
2530 const struct gdb_xml_element
*element
,
2531 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
2533 struct threads_parsing_context
*data
= user_data
;
2535 struct thread_item item
;
2537 struct gdb_xml_value
*attr
;
2539 id
= xml_find_attribute (attributes
, "id")->value
;
2540 item
.ptid
= read_ptid (id
, NULL
);
2542 attr
= xml_find_attribute (attributes
, "core");
2544 item
.core
= *(ULONGEST
*) attr
->value
;
2550 VEC_safe_push (thread_item_t
, data
->items
, &item
);
2554 end_thread (struct gdb_xml_parser
*parser
,
2555 const struct gdb_xml_element
*element
,
2556 void *user_data
, const char *body_text
)
2558 struct threads_parsing_context
*data
= user_data
;
2560 if (body_text
&& *body_text
)
2561 VEC_last (thread_item_t
, data
->items
)->extra
= xstrdup (body_text
);
2564 const struct gdb_xml_attribute thread_attributes
[] = {
2565 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
2566 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
2567 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
2570 const struct gdb_xml_element thread_children
[] = {
2571 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
2574 const struct gdb_xml_element threads_children
[] = {
2575 { "thread", thread_attributes
, thread_children
,
2576 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
2577 start_thread
, end_thread
},
2578 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
2581 const struct gdb_xml_element threads_elements
[] = {
2582 { "threads", NULL
, threads_children
,
2583 GDB_XML_EF_NONE
, NULL
, NULL
},
2584 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
2587 /* Discard the contents of the constructed thread info context. */
2590 clear_threads_parsing_context (void *p
)
2592 struct threads_parsing_context
*context
= p
;
2594 struct thread_item
*item
;
2596 for (i
= 0; VEC_iterate (thread_item_t
, context
->items
, i
, item
); ++i
)
2597 xfree (item
->extra
);
2599 VEC_free (thread_item_t
, context
->items
);
2605 * Find all threads for info threads command.
2606 * Uses new thread protocol contributed by Cisco.
2607 * Falls back and attempts to use the older method (above)
2608 * if the target doesn't respond to the new method.
2612 remote_threads_info (struct target_ops
*ops
)
2614 struct remote_state
*rs
= get_remote_state ();
2618 if (remote_desc
== 0) /* paranoia */
2619 error (_("Command can only be used when connected to the remote target."));
2621 #if defined(HAVE_LIBEXPAT)
2622 if (remote_protocol_packets
[PACKET_qXfer_threads
].support
== PACKET_ENABLE
)
2624 char *xml
= target_read_stralloc (¤t_target
,
2625 TARGET_OBJECT_THREADS
, NULL
);
2627 struct cleanup
*back_to
= make_cleanup (xfree
, xml
);
2631 struct threads_parsing_context context
;
2633 context
.items
= NULL
;
2634 make_cleanup (clear_threads_parsing_context
, &context
);
2636 if (gdb_xml_parse_quick (_("threads"), "threads.dtd",
2637 threads_elements
, xml
, &context
) == 0)
2640 struct thread_item
*item
;
2643 VEC_iterate (thread_item_t
, context
.items
, i
, item
);
2646 if (!ptid_equal (item
->ptid
, null_ptid
))
2648 struct private_thread_info
*info
;
2649 /* In non-stop mode, we assume new found threads
2650 are running until proven otherwise with a
2651 stop reply. In all-stop, we can only get
2652 here if all threads are stopped. */
2653 int running
= non_stop
? 1 : 0;
2655 remote_notice_new_inferior (item
->ptid
, running
);
2657 info
= demand_private_info (item
->ptid
);
2658 info
->core
= item
->core
;
2659 info
->extra
= item
->extra
;
2666 do_cleanups (back_to
);
2671 if (use_threadinfo_query
)
2673 putpkt ("qfThreadInfo");
2674 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2676 if (bufp
[0] != '\0') /* q packet recognized */
2678 while (*bufp
++ == 'm') /* reply contains one or more TID */
2682 new_thread
= read_ptid (bufp
, &bufp
);
2683 if (!ptid_equal (new_thread
, null_ptid
))
2685 /* In non-stop mode, we assume new found threads
2686 are running until proven otherwise with a
2687 stop reply. In all-stop, we can only get
2688 here if all threads are stopped. */
2689 int running
= non_stop
? 1 : 0;
2691 remote_notice_new_inferior (new_thread
, running
);
2694 while (*bufp
++ == ','); /* comma-separated list */
2695 putpkt ("qsThreadInfo");
2696 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2703 /* Only qfThreadInfo is supported in non-stop mode. */
2707 /* Else fall back to old method based on jmetzler protocol. */
2708 use_threadinfo_query
= 0;
2709 remote_find_new_threads ();
2714 * Collect a descriptive string about the given thread.
2715 * The target may say anything it wants to about the thread
2716 * (typically info about its blocked / runnable state, name, etc.).
2717 * This string will appear in the info threads display.
2719 * Optional: targets are not required to implement this function.
2723 remote_threads_extra_info (struct thread_info
*tp
)
2725 struct remote_state
*rs
= get_remote_state ();
2729 struct gdb_ext_thread_info threadinfo
;
2730 static char display_buf
[100]; /* arbitrary... */
2731 int n
= 0; /* position in display_buf */
2733 if (remote_desc
== 0) /* paranoia */
2734 internal_error (__FILE__
, __LINE__
,
2735 _("remote_threads_extra_info"));
2737 if (ptid_equal (tp
->ptid
, magic_null_ptid
)
2738 || (ptid_get_pid (tp
->ptid
) != 0 && ptid_get_tid (tp
->ptid
) == 0))
2739 /* This is the main thread which was added by GDB. The remote
2740 server doesn't know about it. */
2743 if (remote_protocol_packets
[PACKET_qXfer_threads
].support
== PACKET_ENABLE
)
2745 struct thread_info
*info
= find_thread_ptid (tp
->ptid
);
2747 if (info
&& info
->private)
2748 return info
->private->extra
;
2753 if (use_threadextra_query
)
2756 char *endb
= rs
->buf
+ get_remote_packet_size ();
2758 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
2760 write_ptid (b
, endb
, tp
->ptid
);
2763 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2764 if (rs
->buf
[0] != 0)
2766 n
= min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
2767 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
2768 display_buf
[result
] = '\0';
2773 /* If the above query fails, fall back to the old method. */
2774 use_threadextra_query
= 0;
2775 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
2776 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
2777 int_to_threadref (&id
, ptid_get_tid (tp
->ptid
));
2778 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
2779 if (threadinfo
.active
)
2781 if (*threadinfo
.shortname
)
2782 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
2783 " Name: %s,", threadinfo
.shortname
);
2784 if (*threadinfo
.display
)
2785 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2786 " State: %s,", threadinfo
.display
);
2787 if (*threadinfo
.more_display
)
2788 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2789 " Priority: %s", threadinfo
.more_display
);
2793 /* For purely cosmetic reasons, clear up trailing commas. */
2794 if (',' == display_buf
[n
-1])
2795 display_buf
[n
-1] = ' ';
2804 remote_static_tracepoint_marker_at (CORE_ADDR addr
,
2805 struct static_tracepoint_marker
*marker
)
2807 struct remote_state
*rs
= get_remote_state ();
2810 sprintf (p
, "qTSTMat:");
2812 p
+= hexnumstr (p
, addr
);
2814 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2818 error (_("Remote failure reply: %s"), p
);
2822 parse_static_tracepoint_marker_definition (p
, &p
, marker
);
2830 free_current_marker (void *arg
)
2832 struct static_tracepoint_marker
**marker_p
= arg
;
2834 if (*marker_p
!= NULL
)
2836 release_static_tracepoint_marker (*marker_p
);
2843 static VEC(static_tracepoint_marker_p
) *
2844 remote_static_tracepoint_markers_by_strid (const char *strid
)
2846 struct remote_state
*rs
= get_remote_state ();
2847 VEC(static_tracepoint_marker_p
) *markers
= NULL
;
2848 struct static_tracepoint_marker
*marker
= NULL
;
2849 struct cleanup
*old_chain
;
2852 /* Ask for a first packet of static tracepoint marker
2855 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2858 error (_("Remote failure reply: %s"), p
);
2860 old_chain
= make_cleanup (free_current_marker
, &marker
);
2865 marker
= XCNEW (struct static_tracepoint_marker
);
2869 parse_static_tracepoint_marker_definition (p
, &p
, marker
);
2871 if (strid
== NULL
|| strcmp (strid
, marker
->str_id
) == 0)
2873 VEC_safe_push (static_tracepoint_marker_p
,
2879 release_static_tracepoint_marker (marker
);
2880 memset (marker
, 0, sizeof (*marker
));
2883 while (*p
++ == ','); /* comma-separated list */
2884 /* Ask for another packet of static tracepoint definition. */
2886 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2890 do_cleanups (old_chain
);
2895 /* Implement the to_get_ada_task_ptid function for the remote targets. */
2898 remote_get_ada_task_ptid (long lwp
, long thread
)
2900 return ptid_build (ptid_get_pid (inferior_ptid
), 0, lwp
);
2904 /* Restart the remote side; this is an extended protocol operation. */
2907 extended_remote_restart (void)
2909 struct remote_state
*rs
= get_remote_state ();
2911 /* Send the restart command; for reasons I don't understand the
2912 remote side really expects a number after the "R". */
2913 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
2916 remote_fileio_reset ();
2919 /* Clean up connection to a remote debugger. */
2922 remote_close (int quitting
)
2924 if (remote_desc
== NULL
)
2925 return; /* already closed */
2927 /* Make sure we leave stdin registered in the event loop, and we
2928 don't leave the async SIGINT signal handler installed. */
2929 remote_terminal_ours ();
2931 serial_close (remote_desc
);
2934 /* We don't have a connection to the remote stub anymore. Get rid
2935 of all the inferiors and their threads we were controlling.
2936 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
2937 will be unable to find the thread corresponding to (pid, 0, 0). */
2938 inferior_ptid
= null_ptid
;
2939 discard_all_inferiors ();
2941 /* We're no longer interested in any of these events. */
2942 discard_pending_stop_replies (-1);
2944 if (remote_async_inferior_event_token
)
2945 delete_async_event_handler (&remote_async_inferior_event_token
);
2946 if (remote_async_get_pending_events_token
)
2947 delete_async_event_handler (&remote_async_get_pending_events_token
);
2950 /* Query the remote side for the text, data and bss offsets. */
2955 struct remote_state
*rs
= get_remote_state ();
2958 int lose
, num_segments
= 0, do_sections
, do_segments
;
2959 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
2960 struct section_offsets
*offs
;
2961 struct symfile_segment_data
*data
;
2963 if (symfile_objfile
== NULL
)
2966 putpkt ("qOffsets");
2967 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2970 if (buf
[0] == '\000')
2971 return; /* Return silently. Stub doesn't support
2975 warning (_("Remote failure reply: %s"), buf
);
2979 /* Pick up each field in turn. This used to be done with scanf, but
2980 scanf will make trouble if CORE_ADDR size doesn't match
2981 conversion directives correctly. The following code will work
2982 with any size of CORE_ADDR. */
2983 text_addr
= data_addr
= bss_addr
= 0;
2987 if (strncmp (ptr
, "Text=", 5) == 0)
2990 /* Don't use strtol, could lose on big values. */
2991 while (*ptr
&& *ptr
!= ';')
2992 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2994 if (strncmp (ptr
, ";Data=", 6) == 0)
2997 while (*ptr
&& *ptr
!= ';')
2998 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3003 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
3006 while (*ptr
&& *ptr
!= ';')
3007 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
3009 if (bss_addr
!= data_addr
)
3010 warning (_("Target reported unsupported offsets: %s"), buf
);
3015 else if (strncmp (ptr
, "TextSeg=", 8) == 0)
3018 /* Don't use strtol, could lose on big values. */
3019 while (*ptr
&& *ptr
!= ';')
3020 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3023 if (strncmp (ptr
, ";DataSeg=", 9) == 0)
3026 while (*ptr
&& *ptr
!= ';')
3027 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3035 error (_("Malformed response to offset query, %s"), buf
);
3036 else if (*ptr
!= '\0')
3037 warning (_("Target reported unsupported offsets: %s"), buf
);
3039 offs
= ((struct section_offsets
*)
3040 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
3041 memcpy (offs
, symfile_objfile
->section_offsets
,
3042 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
3044 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
3045 do_segments
= (data
!= NULL
);
3046 do_sections
= num_segments
== 0;
3048 if (num_segments
> 0)
3050 segments
[0] = text_addr
;
3051 segments
[1] = data_addr
;
3053 /* If we have two segments, we can still try to relocate everything
3054 by assuming that the .text and .data offsets apply to the whole
3055 text and data segments. Convert the offsets given in the packet
3056 to base addresses for symfile_map_offsets_to_segments. */
3057 else if (data
&& data
->num_segments
== 2)
3059 segments
[0] = data
->segment_bases
[0] + text_addr
;
3060 segments
[1] = data
->segment_bases
[1] + data_addr
;
3063 /* If the object file has only one segment, assume that it is text
3064 rather than data; main programs with no writable data are rare,
3065 but programs with no code are useless. Of course the code might
3066 have ended up in the data segment... to detect that we would need
3067 the permissions here. */
3068 else if (data
&& data
->num_segments
== 1)
3070 segments
[0] = data
->segment_bases
[0] + text_addr
;
3073 /* There's no way to relocate by segment. */
3079 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
3080 offs
, num_segments
, segments
);
3082 if (ret
== 0 && !do_sections
)
3083 error (_("Can not handle qOffsets TextSeg "
3084 "response with this symbol file"));
3091 free_symfile_segment_data (data
);
3095 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
3097 /* This is a temporary kludge to force data and bss to use the
3098 same offsets because that's what nlmconv does now. The real
3099 solution requires changes to the stub and remote.c that I
3100 don't have time to do right now. */
3102 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
3103 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
3106 objfile_relocate (symfile_objfile
, offs
);
3109 /* Callback for iterate_over_threads. Set the STOP_REQUESTED flags in
3110 threads we know are stopped already. This is used during the
3111 initial remote connection in non-stop mode --- threads that are
3112 reported as already being stopped are left stopped. */
3115 set_stop_requested_callback (struct thread_info
*thread
, void *data
)
3117 /* If we have a stop reply for this thread, it must be stopped. */
3118 if (peek_stop_reply (thread
->ptid
))
3119 set_stop_requested (thread
->ptid
, 1);
3124 /* Send interrupt_sequence to remote target. */
3126 send_interrupt_sequence (void)
3128 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
3129 serial_write (remote_desc
, "\x03", 1);
3130 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
3131 serial_send_break (remote_desc
);
3132 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
3134 serial_send_break (remote_desc
);
3135 serial_write (remote_desc
, "g", 1);
3138 internal_error (__FILE__
, __LINE__
,
3139 _("Invalid value for interrupt_sequence_mode: %s."),
3140 interrupt_sequence_mode
);
3144 remote_start_remote (int from_tty
, struct target_ops
*target
, int extended_p
)
3146 struct remote_state
*rs
= get_remote_state ();
3147 struct packet_config
*noack_config
;
3148 char *wait_status
= NULL
;
3150 immediate_quit
++; /* Allow user to interrupt it. */
3152 if (interrupt_on_connect
)
3153 send_interrupt_sequence ();
3155 /* Ack any packet which the remote side has already sent. */
3156 serial_write (remote_desc
, "+", 1);
3158 /* The first packet we send to the target is the optional "supported
3159 packets" request. If the target can answer this, it will tell us
3160 which later probes to skip. */
3161 remote_query_supported ();
3163 /* If the stub wants to get a QAllow, compose one and send it. */
3164 if (remote_protocol_packets
[PACKET_QAllow
].support
!= PACKET_DISABLE
)
3165 remote_set_permissions ();
3167 /* Next, we possibly activate noack mode.
3169 If the QStartNoAckMode packet configuration is set to AUTO,
3170 enable noack mode if the stub reported a wish for it with
3173 If set to TRUE, then enable noack mode even if the stub didn't
3174 report it in qSupported. If the stub doesn't reply OK, the
3175 session ends with an error.
3177 If FALSE, then don't activate noack mode, regardless of what the
3178 stub claimed should be the default with qSupported. */
3180 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
3182 if (noack_config
->detect
== AUTO_BOOLEAN_TRUE
3183 || (noack_config
->detect
== AUTO_BOOLEAN_AUTO
3184 && noack_config
->support
== PACKET_ENABLE
))
3186 putpkt ("QStartNoAckMode");
3187 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3188 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
3194 /* Tell the remote that we are using the extended protocol. */
3196 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3199 /* Next, if the target can specify a description, read it. We do
3200 this before anything involving memory or registers. */
3201 target_find_description ();
3203 /* Next, now that we know something about the target, update the
3204 address spaces in the program spaces. */
3205 update_address_spaces ();
3207 /* On OSs where the list of libraries is global to all
3208 processes, we fetch them early. */
3209 if (gdbarch_has_global_solist (target_gdbarch
))
3210 solib_add (NULL
, from_tty
, target
, auto_solib_add
);
3214 if (!rs
->non_stop_aware
)
3215 error (_("Non-stop mode requested, but remote "
3216 "does not support non-stop"));
3218 putpkt ("QNonStop:1");
3219 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3221 if (strcmp (rs
->buf
, "OK") != 0)
3222 error (_("Remote refused setting non-stop mode with: %s"), rs
->buf
);
3224 /* Find about threads and processes the stub is already
3225 controlling. We default to adding them in the running state.
3226 The '?' query below will then tell us about which threads are
3228 remote_threads_info (target
);
3230 else if (rs
->non_stop_aware
)
3232 /* Don't assume that the stub can operate in all-stop mode.
3233 Request it explicitely. */
3234 putpkt ("QNonStop:0");
3235 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3237 if (strcmp (rs
->buf
, "OK") != 0)
3238 error (_("Remote refused setting all-stop mode with: %s"), rs
->buf
);
3241 /* Check whether the target is running now. */
3243 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3247 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
3250 error (_("The target is not running (try extended-remote?)"));
3252 /* We're connected, but not running. Drop out before we
3253 call start_remote. */
3258 /* Save the reply for later. */
3259 wait_status
= alloca (strlen (rs
->buf
) + 1);
3260 strcpy (wait_status
, rs
->buf
);
3263 /* Let the stub know that we want it to return the thread. */
3264 set_continue_thread (minus_one_ptid
);
3266 /* Without this, some commands which require an active target
3267 (such as kill) won't work. This variable serves (at least)
3268 double duty as both the pid of the target process (if it has
3269 such), and as a flag indicating that a target is active.
3270 These functions should be split out into seperate variables,
3271 especially since GDB will someday have a notion of debugging
3272 several processes. */
3273 inferior_ptid
= magic_null_ptid
;
3275 /* Now, if we have thread information, update inferior_ptid. */
3276 inferior_ptid
= remote_current_thread (inferior_ptid
);
3278 remote_add_inferior (ptid_get_pid (inferior_ptid
), -1);
3280 /* Always add the main thread. */
3281 add_thread_silent (inferior_ptid
);
3283 get_offsets (); /* Get text, data & bss offsets. */
3285 /* If we could not find a description using qXfer, and we know
3286 how to do it some other way, try again. This is not
3287 supported for non-stop; it could be, but it is tricky if
3288 there are no stopped threads when we connect. */
3289 if (remote_read_description_p (target
)
3290 && gdbarch_target_desc (target_gdbarch
) == NULL
)
3292 target_clear_description ();
3293 target_find_description ();
3296 /* Use the previously fetched status. */
3297 gdb_assert (wait_status
!= NULL
);
3298 strcpy (rs
->buf
, wait_status
);
3299 rs
->cached_wait_status
= 1;
3302 start_remote (from_tty
); /* Initialize gdb process mechanisms. */
3306 /* Clear WFI global state. Do this before finding about new
3307 threads and inferiors, and setting the current inferior.
3308 Otherwise we would clear the proceed status of the current
3309 inferior when we want its stop_soon state to be preserved
3310 (see notice_new_inferior). */
3311 init_wait_for_inferior ();
3313 /* In non-stop, we will either get an "OK", meaning that there
3314 are no stopped threads at this time; or, a regular stop
3315 reply. In the latter case, there may be more than one thread
3316 stopped --- we pull them all out using the vStopped
3318 if (strcmp (rs
->buf
, "OK") != 0)
3320 struct stop_reply
*stop_reply
;
3321 struct cleanup
*old_chain
;
3323 stop_reply
= stop_reply_xmalloc ();
3324 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
3326 remote_parse_stop_reply (rs
->buf
, stop_reply
);
3327 discard_cleanups (old_chain
);
3329 /* get_pending_stop_replies acks this one, and gets the rest
3331 pending_stop_reply
= stop_reply
;
3332 remote_get_pending_stop_replies ();
3334 /* Make sure that threads that were stopped remain
3336 iterate_over_threads (set_stop_requested_callback
, NULL
);
3339 if (target_can_async_p ())
3340 target_async (inferior_event_handler
, 0);
3342 if (thread_count () == 0)
3345 error (_("The target is not running (try extended-remote?)"));
3347 /* We're connected, but not running. Drop out before we
3348 call start_remote. */
3352 /* Let the stub know that we want it to return the thread. */
3354 /* Force the stub to choose a thread. */
3355 set_general_thread (null_ptid
);
3358 inferior_ptid
= remote_current_thread (minus_one_ptid
);
3359 if (ptid_equal (inferior_ptid
, minus_one_ptid
))
3360 error (_("remote didn't report the current thread in non-stop mode"));
3362 get_offsets (); /* Get text, data & bss offsets. */
3364 /* In non-stop mode, any cached wait status will be stored in
3365 the stop reply queue. */
3366 gdb_assert (wait_status
== NULL
);
3368 /* Report all signals during attach/startup. */
3369 remote_pass_signals (0, NULL
);
3372 /* If we connected to a live target, do some additional setup. */
3373 if (target_has_execution
)
3375 if (exec_bfd
) /* No use without an exec file. */
3376 remote_check_symbols (symfile_objfile
);
3379 /* Possibly the target has been engaged in a trace run started
3380 previously; find out where things are at. */
3381 if (remote_get_trace_status (current_trace_status ()) != -1)
3383 struct uploaded_tp
*uploaded_tps
= NULL
;
3384 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
3386 if (current_trace_status ()->running
)
3387 printf_filtered (_("Trace is already running on the target.\n"));
3389 /* Get trace state variables first, they may be checked when
3390 parsing uploaded commands. */
3392 remote_upload_trace_state_variables (&uploaded_tsvs
);
3394 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
3396 remote_upload_tracepoints (&uploaded_tps
);
3398 merge_uploaded_tracepoints (&uploaded_tps
);
3401 /* If breakpoints are global, insert them now. */
3402 if (gdbarch_has_global_breakpoints (target_gdbarch
)
3403 && breakpoints_always_inserted_mode ())
3404 insert_breakpoints ();
3407 /* Open a connection to a remote debugger.
3408 NAME is the filename used for communication. */
3411 remote_open (char *name
, int from_tty
)
3413 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
3416 /* Open a connection to a remote debugger using the extended
3417 remote gdb protocol. NAME is the filename used for communication. */
3420 extended_remote_open (char *name
, int from_tty
)
3422 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
3425 /* Generic code for opening a connection to a remote target. */
3428 init_all_packet_configs (void)
3432 for (i
= 0; i
< PACKET_MAX
; i
++)
3433 update_packet_config (&remote_protocol_packets
[i
]);
3436 /* Symbol look-up. */
3439 remote_check_symbols (struct objfile
*objfile
)
3441 struct remote_state
*rs
= get_remote_state ();
3442 char *msg
, *reply
, *tmp
;
3443 struct minimal_symbol
*sym
;
3446 /* The remote side has no concept of inferiors that aren't running
3447 yet, it only knows about running processes. If we're connected
3448 but our current inferior is not running, we should not invite the
3449 remote target to request symbol lookups related to its
3450 (unrelated) current process. */
3451 if (!target_has_execution
)
3454 if (remote_protocol_packets
[PACKET_qSymbol
].support
== PACKET_DISABLE
)
3457 /* Make sure the remote is pointing at the right process. Note
3458 there's no way to select "no process". */
3459 set_general_process ();
3461 /* Allocate a message buffer. We can't reuse the input buffer in RS,
3462 because we need both at the same time. */
3463 msg
= alloca (get_remote_packet_size ());
3465 /* Invite target to request symbol lookups. */
3467 putpkt ("qSymbol::");
3468 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3469 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSymbol
]);
3472 while (strncmp (reply
, "qSymbol:", 8) == 0)
3475 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
3477 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
3479 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
3482 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
3483 CORE_ADDR sym_addr
= SYMBOL_VALUE_ADDRESS (sym
);
3485 /* If this is a function address, return the start of code
3486 instead of any data function descriptor. */
3487 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch
,
3491 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
3492 phex_nz (sym_addr
, addr_size
), &reply
[8]);
3496 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3501 static struct serial
*
3502 remote_serial_open (char *name
)
3504 static int udp_warning
= 0;
3506 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
3507 of in ser-tcp.c, because it is the remote protocol assuming that the
3508 serial connection is reliable and not the serial connection promising
3510 if (!udp_warning
&& strncmp (name
, "udp:", 4) == 0)
3512 warning (_("The remote protocol may be unreliable over UDP.\n"
3513 "Some events may be lost, rendering further debugging "
3518 return serial_open (name
);
3521 /* Inform the target of our permission settings. The permission flags
3522 work without this, but if the target knows the settings, it can do
3523 a couple things. First, it can add its own check, to catch cases
3524 that somehow manage to get by the permissions checks in target
3525 methods. Second, if the target is wired to disallow particular
3526 settings (for instance, a system in the field that is not set up to
3527 be able to stop at a breakpoint), it can object to any unavailable
3531 remote_set_permissions (void)
3533 struct remote_state
*rs
= get_remote_state ();
3535 sprintf (rs
->buf
, "QAllow:"
3536 "WriteReg:%x;WriteMem:%x;"
3537 "InsertBreak:%x;InsertTrace:%x;"
3538 "InsertFastTrace:%x;Stop:%x",
3539 may_write_registers
, may_write_memory
,
3540 may_insert_breakpoints
, may_insert_tracepoints
,
3541 may_insert_fast_tracepoints
, may_stop
);
3543 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3545 /* If the target didn't like the packet, warn the user. Do not try
3546 to undo the user's settings, that would just be maddening. */
3547 if (strcmp (rs
->buf
, "OK") != 0)
3548 warning (_("Remote refused setting permissions with: %s"), rs
->buf
);
3551 /* This type describes each known response to the qSupported
3553 struct protocol_feature
3555 /* The name of this protocol feature. */
3558 /* The default for this protocol feature. */
3559 enum packet_support default_support
;
3561 /* The function to call when this feature is reported, or after
3562 qSupported processing if the feature is not supported.
3563 The first argument points to this structure. The second
3564 argument indicates whether the packet requested support be
3565 enabled, disabled, or probed (or the default, if this function
3566 is being called at the end of processing and this feature was
3567 not reported). The third argument may be NULL; if not NULL, it
3568 is a NUL-terminated string taken from the packet following
3569 this feature's name and an equals sign. */
3570 void (*func
) (const struct protocol_feature
*, enum packet_support
,
3573 /* The corresponding packet for this feature. Only used if
3574 FUNC is remote_supported_packet. */
3579 remote_supported_packet (const struct protocol_feature
*feature
,
3580 enum packet_support support
,
3581 const char *argument
)
3585 warning (_("Remote qSupported response supplied an unexpected value for"
3586 " \"%s\"."), feature
->name
);
3590 if (remote_protocol_packets
[feature
->packet
].support
3591 == PACKET_SUPPORT_UNKNOWN
)
3592 remote_protocol_packets
[feature
->packet
].support
= support
;
3596 remote_packet_size (const struct protocol_feature
*feature
,
3597 enum packet_support support
, const char *value
)
3599 struct remote_state
*rs
= get_remote_state ();
3604 if (support
!= PACKET_ENABLE
)
3607 if (value
== NULL
|| *value
== '\0')
3609 warning (_("Remote target reported \"%s\" without a size."),
3615 packet_size
= strtol (value
, &value_end
, 16);
3616 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
3618 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
3619 feature
->name
, value
);
3623 if (packet_size
> MAX_REMOTE_PACKET_SIZE
)
3625 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
3626 packet_size
, MAX_REMOTE_PACKET_SIZE
);
3627 packet_size
= MAX_REMOTE_PACKET_SIZE
;
3630 /* Record the new maximum packet size. */
3631 rs
->explicit_packet_size
= packet_size
;
3635 remote_multi_process_feature (const struct protocol_feature
*feature
,
3636 enum packet_support support
, const char *value
)
3638 struct remote_state
*rs
= get_remote_state ();
3640 rs
->multi_process_aware
= (support
== PACKET_ENABLE
);
3644 remote_non_stop_feature (const struct protocol_feature
*feature
,
3645 enum packet_support support
, const char *value
)
3647 struct remote_state
*rs
= get_remote_state ();
3649 rs
->non_stop_aware
= (support
== PACKET_ENABLE
);
3653 remote_cond_tracepoint_feature (const struct protocol_feature
*feature
,
3654 enum packet_support support
,
3657 struct remote_state
*rs
= get_remote_state ();
3659 rs
->cond_tracepoints
= (support
== PACKET_ENABLE
);
3663 remote_fast_tracepoint_feature (const struct protocol_feature
*feature
,
3664 enum packet_support support
,
3667 struct remote_state
*rs
= get_remote_state ();
3669 rs
->fast_tracepoints
= (support
== PACKET_ENABLE
);
3673 remote_static_tracepoint_feature (const struct protocol_feature
*feature
,
3674 enum packet_support support
,
3677 struct remote_state
*rs
= get_remote_state ();
3679 rs
->static_tracepoints
= (support
== PACKET_ENABLE
);
3683 remote_disconnected_tracing_feature (const struct protocol_feature
*feature
,
3684 enum packet_support support
,
3687 struct remote_state
*rs
= get_remote_state ();
3689 rs
->disconnected_tracing
= (support
== PACKET_ENABLE
);
3692 static struct protocol_feature remote_protocol_features
[] = {
3693 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
3694 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
3695 PACKET_qXfer_auxv
},
3696 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
3697 PACKET_qXfer_features
},
3698 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
3699 PACKET_qXfer_libraries
},
3700 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
3701 PACKET_qXfer_memory_map
},
3702 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
3703 PACKET_qXfer_spu_read
},
3704 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
3705 PACKET_qXfer_spu_write
},
3706 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
3707 PACKET_qXfer_osdata
},
3708 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
3709 PACKET_qXfer_threads
},
3710 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
3711 PACKET_qXfer_traceframe_info
},
3712 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
3713 PACKET_QPassSignals
},
3714 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
3715 PACKET_QStartNoAckMode
},
3716 { "multiprocess", PACKET_DISABLE
, remote_multi_process_feature
, -1 },
3717 { "QNonStop", PACKET_DISABLE
, remote_non_stop_feature
, -1 },
3718 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
3719 PACKET_qXfer_siginfo_read
},
3720 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
3721 PACKET_qXfer_siginfo_write
},
3722 { "ConditionalTracepoints", PACKET_DISABLE
, remote_cond_tracepoint_feature
,
3723 PACKET_ConditionalTracepoints
},
3724 { "FastTracepoints", PACKET_DISABLE
, remote_fast_tracepoint_feature
,
3725 PACKET_FastTracepoints
},
3726 { "StaticTracepoints", PACKET_DISABLE
, remote_static_tracepoint_feature
,
3727 PACKET_StaticTracepoints
},
3728 { "DisconnectedTracing", PACKET_DISABLE
, remote_disconnected_tracing_feature
,
3730 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
3732 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
3734 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
3735 PACKET_TracepointSource
},
3736 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
3740 static char *remote_support_xml
;
3742 /* Register string appended to "xmlRegisters=" in qSupported query. */
3745 register_remote_support_xml (const char *xml
)
3747 #if defined(HAVE_LIBEXPAT)
3748 if (remote_support_xml
== NULL
)
3749 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
3752 char *copy
= xstrdup (remote_support_xml
+ 13);
3753 char *p
= strtok (copy
, ",");
3757 if (strcmp (p
, xml
) == 0)
3764 while ((p
= strtok (NULL
, ",")) != NULL
);
3767 remote_support_xml
= reconcat (remote_support_xml
,
3768 remote_support_xml
, ",", xml
,
3775 remote_query_supported_append (char *msg
, const char *append
)
3778 return reconcat (msg
, msg
, ";", append
, (char *) NULL
);
3780 return xstrdup (append
);
3784 remote_query_supported (void)
3786 struct remote_state
*rs
= get_remote_state ();
3789 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
3791 /* The packet support flags are handled differently for this packet
3792 than for most others. We treat an error, a disabled packet, and
3793 an empty response identically: any features which must be reported
3794 to be used will be automatically disabled. An empty buffer
3795 accomplishes this, since that is also the representation for a list
3796 containing no features. */
3799 if (remote_protocol_packets
[PACKET_qSupported
].support
!= PACKET_DISABLE
)
3802 struct cleanup
*old_chain
= make_cleanup (free_current_contents
, &q
);
3805 q
= remote_query_supported_append (q
, "multiprocess+");
3807 if (remote_support_xml
)
3808 q
= remote_query_supported_append (q
, remote_support_xml
);
3810 q
= remote_query_supported_append (q
, "qRelocInsn+");
3812 q
= reconcat (q
, "qSupported:", q
, (char *) NULL
);
3815 do_cleanups (old_chain
);
3817 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3819 /* If an error occured, warn, but do not return - just reset the
3820 buffer to empty and go on to disable features. */
3821 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
3824 warning (_("Remote failure reply: %s"), rs
->buf
);
3829 memset (seen
, 0, sizeof (seen
));
3834 enum packet_support is_supported
;
3835 char *p
, *end
, *name_end
, *value
;
3837 /* First separate out this item from the rest of the packet. If
3838 there's another item after this, we overwrite the separator
3839 (terminated strings are much easier to work with). */
3841 end
= strchr (p
, ';');
3844 end
= p
+ strlen (p
);
3854 warning (_("empty item in \"qSupported\" response"));
3859 name_end
= strchr (p
, '=');
3862 /* This is a name=value entry. */
3863 is_supported
= PACKET_ENABLE
;
3864 value
= name_end
+ 1;
3873 is_supported
= PACKET_ENABLE
;
3877 is_supported
= PACKET_DISABLE
;
3881 is_supported
= PACKET_SUPPORT_UNKNOWN
;
3885 warning (_("unrecognized item \"%s\" "
3886 "in \"qSupported\" response"), p
);
3892 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3893 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
3895 const struct protocol_feature
*feature
;
3898 feature
= &remote_protocol_features
[i
];
3899 feature
->func (feature
, is_supported
, value
);
3904 /* If we increased the packet size, make sure to increase the global
3905 buffer size also. We delay this until after parsing the entire
3906 qSupported packet, because this is the same buffer we were
3908 if (rs
->buf_size
< rs
->explicit_packet_size
)
3910 rs
->buf_size
= rs
->explicit_packet_size
;
3911 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
3914 /* Handle the defaults for unmentioned features. */
3915 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3918 const struct protocol_feature
*feature
;
3920 feature
= &remote_protocol_features
[i
];
3921 feature
->func (feature
, feature
->default_support
, NULL
);
3927 remote_open_1 (char *name
, int from_tty
,
3928 struct target_ops
*target
, int extended_p
)
3930 struct remote_state
*rs
= get_remote_state ();
3933 error (_("To open a remote debug connection, you need to specify what\n"
3934 "serial device is attached to the remote system\n"
3935 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
3937 /* See FIXME above. */
3938 if (!target_async_permitted
)
3939 wait_forever_enabled_p
= 1;
3941 /* If we're connected to a running target, target_preopen will kill it.
3942 But if we're connected to a target system with no running process,
3943 then we will still be connected when it returns. Ask this question
3944 first, before target_preopen has a chance to kill anything. */
3945 if (remote_desc
!= NULL
&& !have_inferiors ())
3948 || query (_("Already connected to a remote target. Disconnect? ")))
3951 error (_("Still connected."));
3954 target_preopen (from_tty
);
3956 unpush_target (target
);
3958 /* This time without a query. If we were connected to an
3959 extended-remote target and target_preopen killed the running
3960 process, we may still be connected. If we are starting "target
3961 remote" now, the extended-remote target will not have been
3962 removed by unpush_target. */
3963 if (remote_desc
!= NULL
&& !have_inferiors ())
3966 /* Make sure we send the passed signals list the next time we resume. */
3967 xfree (last_pass_packet
);
3968 last_pass_packet
= NULL
;
3970 remote_fileio_reset ();
3971 reopen_exec_file ();
3974 remote_desc
= remote_serial_open (name
);
3976 perror_with_name (name
);
3978 if (baud_rate
!= -1)
3980 if (serial_setbaudrate (remote_desc
, baud_rate
))
3982 /* The requested speed could not be set. Error out to
3983 top level after closing remote_desc. Take care to
3984 set remote_desc to NULL to avoid closing remote_desc
3986 serial_close (remote_desc
);
3988 perror_with_name (name
);
3992 serial_raw (remote_desc
);
3994 /* If there is something sitting in the buffer we might take it as a
3995 response to a command, which would be bad. */
3996 serial_flush_input (remote_desc
);
4000 puts_filtered ("Remote debugging using ");
4001 puts_filtered (name
);
4002 puts_filtered ("\n");
4004 push_target (target
); /* Switch to using remote target now. */
4006 /* Register extra event sources in the event loop. */
4007 remote_async_inferior_event_token
4008 = create_async_event_handler (remote_async_inferior_event_handler
,
4010 remote_async_get_pending_events_token
4011 = create_async_event_handler (remote_async_get_pending_events_handler
,
4014 /* Reset the target state; these things will be queried either by
4015 remote_query_supported or as they are needed. */
4016 init_all_packet_configs ();
4017 rs
->cached_wait_status
= 0;
4018 rs
->explicit_packet_size
= 0;
4020 rs
->multi_process_aware
= 0;
4021 rs
->extended
= extended_p
;
4022 rs
->non_stop_aware
= 0;
4023 rs
->waiting_for_stop_reply
= 0;
4024 rs
->ctrlc_pending_p
= 0;
4026 general_thread
= not_sent_ptid
;
4027 continue_thread
= not_sent_ptid
;
4028 remote_traceframe_number
= -1;
4030 /* Probe for ability to use "ThreadInfo" query, as required. */
4031 use_threadinfo_query
= 1;
4032 use_threadextra_query
= 1;
4034 if (target_async_permitted
)
4036 /* With this target we start out by owning the terminal. */
4037 remote_async_terminal_ours_p
= 1;
4039 /* FIXME: cagney/1999-09-23: During the initial connection it is
4040 assumed that the target is already ready and able to respond to
4041 requests. Unfortunately remote_start_remote() eventually calls
4042 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
4043 around this. Eventually a mechanism that allows
4044 wait_for_inferior() to expect/get timeouts will be
4046 wait_forever_enabled_p
= 0;
4049 /* First delete any symbols previously loaded from shared libraries. */
4050 no_shared_libraries (NULL
, 0);
4053 init_thread_list ();
4055 /* Start the remote connection. If error() or QUIT, discard this
4056 target (we'd otherwise be in an inconsistent state) and then
4057 propogate the error on up the exception chain. This ensures that
4058 the caller doesn't stumble along blindly assuming that the
4059 function succeeded. The CLI doesn't have this problem but other
4060 UI's, such as MI do.
4062 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
4063 this function should return an error indication letting the
4064 caller restore the previous state. Unfortunately the command
4065 ``target remote'' is directly wired to this function making that
4066 impossible. On a positive note, the CLI side of this problem has
4067 been fixed - the function set_cmd_context() makes it possible for
4068 all the ``target ....'' commands to share a common callback
4069 function. See cli-dump.c. */
4071 volatile struct gdb_exception ex
;
4073 TRY_CATCH (ex
, RETURN_MASK_ALL
)
4075 remote_start_remote (from_tty
, target
, extended_p
);
4079 /* Pop the partially set up target - unless something else did
4080 already before throwing the exception. */
4081 if (remote_desc
!= NULL
)
4083 if (target_async_permitted
)
4084 wait_forever_enabled_p
= 1;
4085 throw_exception (ex
);
4089 if (target_async_permitted
)
4090 wait_forever_enabled_p
= 1;
4093 /* This takes a program previously attached to and detaches it. After
4094 this is done, GDB can be used to debug some other program. We
4095 better not have left any breakpoints in the target program or it'll
4096 die when it hits one. */
4099 remote_detach_1 (char *args
, int from_tty
, int extended
)
4101 int pid
= ptid_get_pid (inferior_ptid
);
4102 struct remote_state
*rs
= get_remote_state ();
4105 error (_("Argument given to \"detach\" when remotely debugging."));
4107 if (!target_has_execution
)
4108 error (_("No process to detach from."));
4110 /* Tell the remote target to detach. */
4111 if (remote_multi_process_p (rs
))
4112 sprintf (rs
->buf
, "D;%x", pid
);
4114 strcpy (rs
->buf
, "D");
4117 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4119 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
4121 else if (rs
->buf
[0] == '\0')
4122 error (_("Remote doesn't know how to detach"));
4124 error (_("Can't detach process."));
4128 if (remote_multi_process_p (rs
))
4129 printf_filtered (_("Detached from remote %s.\n"),
4130 target_pid_to_str (pid_to_ptid (pid
)));
4134 puts_filtered (_("Detached from remote process.\n"));
4136 puts_filtered (_("Ending remote debugging.\n"));
4140 discard_pending_stop_replies (pid
);
4141 target_mourn_inferior ();
4145 remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
4147 remote_detach_1 (args
, from_tty
, 0);
4151 extended_remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
4153 remote_detach_1 (args
, from_tty
, 1);
4156 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
4159 remote_disconnect (struct target_ops
*target
, char *args
, int from_tty
)
4162 error (_("Argument given to \"disconnect\" when remotely debugging."));
4164 /* Make sure we unpush even the extended remote targets; mourn
4165 won't do it. So call remote_mourn_1 directly instead of
4166 target_mourn_inferior. */
4167 remote_mourn_1 (target
);
4170 puts_filtered ("Ending remote debugging.\n");
4173 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
4174 be chatty about it. */
4177 extended_remote_attach_1 (struct target_ops
*target
, char *args
, int from_tty
)
4179 struct remote_state
*rs
= get_remote_state ();
4181 char *wait_status
= NULL
;
4183 pid
= parse_pid_to_attach (args
);
4185 /* Remote PID can be freely equal to getpid, do not check it here the same
4186 way as in other targets. */
4188 if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
4189 error (_("This target does not support attaching to a process"));
4191 sprintf (rs
->buf
, "vAttach;%x", pid
);
4193 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4195 if (packet_ok (rs
->buf
,
4196 &remote_protocol_packets
[PACKET_vAttach
]) == PACKET_OK
)
4199 printf_unfiltered (_("Attached to %s\n"),
4200 target_pid_to_str (pid_to_ptid (pid
)));
4204 /* Save the reply for later. */
4205 wait_status
= alloca (strlen (rs
->buf
) + 1);
4206 strcpy (wait_status
, rs
->buf
);
4208 else if (strcmp (rs
->buf
, "OK") != 0)
4209 error (_("Attaching to %s failed with: %s"),
4210 target_pid_to_str (pid_to_ptid (pid
)),
4213 else if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
4214 error (_("This target does not support attaching to a process"));
4216 error (_("Attaching to %s failed"),
4217 target_pid_to_str (pid_to_ptid (pid
)));
4219 set_current_inferior (remote_add_inferior (pid
, 1));
4221 inferior_ptid
= pid_to_ptid (pid
);
4225 struct thread_info
*thread
;
4227 /* Get list of threads. */
4228 remote_threads_info (target
);
4230 thread
= first_thread_of_process (pid
);
4232 inferior_ptid
= thread
->ptid
;
4234 inferior_ptid
= pid_to_ptid (pid
);
4236 /* Invalidate our notion of the remote current thread. */
4237 record_currthread (minus_one_ptid
);
4241 /* Now, if we have thread information, update inferior_ptid. */
4242 inferior_ptid
= remote_current_thread (inferior_ptid
);
4244 /* Add the main thread to the thread list. */
4245 add_thread_silent (inferior_ptid
);
4248 /* Next, if the target can specify a description, read it. We do
4249 this before anything involving memory or registers. */
4250 target_find_description ();
4254 /* Use the previously fetched status. */
4255 gdb_assert (wait_status
!= NULL
);
4257 if (target_can_async_p ())
4259 struct stop_reply
*stop_reply
;
4260 struct cleanup
*old_chain
;
4262 stop_reply
= stop_reply_xmalloc ();
4263 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
4264 remote_parse_stop_reply (wait_status
, stop_reply
);
4265 discard_cleanups (old_chain
);
4266 push_stop_reply (stop_reply
);
4268 target_async (inferior_event_handler
, 0);
4272 gdb_assert (wait_status
!= NULL
);
4273 strcpy (rs
->buf
, wait_status
);
4274 rs
->cached_wait_status
= 1;
4278 gdb_assert (wait_status
== NULL
);
4282 extended_remote_attach (struct target_ops
*ops
, char *args
, int from_tty
)
4284 extended_remote_attach_1 (ops
, args
, from_tty
);
4287 /* Convert hex digit A to a number. */
4292 if (a
>= '0' && a
<= '9')
4294 else if (a
>= 'a' && a
<= 'f')
4295 return a
- 'a' + 10;
4296 else if (a
>= 'A' && a
<= 'F')
4297 return a
- 'A' + 10;
4299 error (_("Reply contains invalid hex digit %d"), a
);
4303 hex2bin (const char *hex
, gdb_byte
*bin
, int count
)
4307 for (i
= 0; i
< count
; i
++)
4309 if (hex
[0] == 0 || hex
[1] == 0)
4311 /* Hex string is short, or of uneven length.
4312 Return the count that has been converted so far. */
4315 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
4321 /* Convert number NIB to a hex digit. */
4329 return 'a' + nib
- 10;
4333 bin2hex (const gdb_byte
*bin
, char *hex
, int count
)
4337 /* May use a length, or a nul-terminated string as input. */
4339 count
= strlen ((char *) bin
);
4341 for (i
= 0; i
< count
; i
++)
4343 *hex
++ = tohex ((*bin
>> 4) & 0xf);
4344 *hex
++ = tohex (*bin
++ & 0xf);
4350 /* Check for the availability of vCont. This function should also check
4354 remote_vcont_probe (struct remote_state
*rs
)
4358 strcpy (rs
->buf
, "vCont?");
4360 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4363 /* Make sure that the features we assume are supported. */
4364 if (strncmp (buf
, "vCont", 5) == 0)
4367 int support_s
, support_S
, support_c
, support_C
;
4373 rs
->support_vCont_t
= 0;
4374 while (p
&& *p
== ';')
4377 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4379 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4381 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4383 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4385 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
4386 rs
->support_vCont_t
= 1;
4388 p
= strchr (p
, ';');
4391 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
4392 BUF will make packet_ok disable the packet. */
4393 if (!support_s
|| !support_S
|| !support_c
|| !support_C
)
4397 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
4400 /* Helper function for building "vCont" resumptions. Write a
4401 resumption to P. ENDP points to one-passed-the-end of the buffer
4402 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
4403 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
4404 resumed thread should be single-stepped and/or signalled. If PTID
4405 equals minus_one_ptid, then all threads are resumed; if PTID
4406 represents a process, then all threads of the process are resumed;
4407 the thread to be stepped and/or signalled is given in the global
4411 append_resumption (char *p
, char *endp
,
4412 ptid_t ptid
, int step
, enum target_signal siggnal
)
4414 struct remote_state
*rs
= get_remote_state ();
4416 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
4417 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
4419 p
+= xsnprintf (p
, endp
- p
, ";s");
4420 else if (siggnal
!= TARGET_SIGNAL_0
)
4421 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
4423 p
+= xsnprintf (p
, endp
- p
, ";c");
4425 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
4429 /* All (-1) threads of process. */
4430 nptid
= ptid_build (ptid_get_pid (ptid
), 0, -1);
4432 p
+= xsnprintf (p
, endp
- p
, ":");
4433 p
= write_ptid (p
, endp
, nptid
);
4435 else if (!ptid_equal (ptid
, minus_one_ptid
))
4437 p
+= xsnprintf (p
, endp
- p
, ":");
4438 p
= write_ptid (p
, endp
, ptid
);
4444 /* Resume the remote inferior by using a "vCont" packet. The thread
4445 to be resumed is PTID; STEP and SIGGNAL indicate whether the
4446 resumed thread should be single-stepped and/or signalled. If PTID
4447 equals minus_one_ptid, then all threads are resumed; the thread to
4448 be stepped and/or signalled is given in the global INFERIOR_PTID.
4449 This function returns non-zero iff it resumes the inferior.
4451 This function issues a strict subset of all possible vCont commands at the
4455 remote_vcont_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
4457 struct remote_state
*rs
= get_remote_state ();
4461 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
4462 remote_vcont_probe (rs
);
4464 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_DISABLE
)
4468 endp
= rs
->buf
+ get_remote_packet_size ();
4470 /* If we could generate a wider range of packets, we'd have to worry
4471 about overflowing BUF. Should there be a generic
4472 "multi-part-packet" packet? */
4474 p
+= xsnprintf (p
, endp
- p
, "vCont");
4476 if (ptid_equal (ptid
, magic_null_ptid
))
4478 /* MAGIC_NULL_PTID means that we don't have any active threads,
4479 so we don't have any TID numbers the inferior will
4480 understand. Make sure to only send forms that do not specify
4482 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
4484 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
4486 /* Resume all threads (of all processes, or of a single
4487 process), with preference for INFERIOR_PTID. This assumes
4488 inferior_ptid belongs to the set of all threads we are about
4490 if (step
|| siggnal
!= TARGET_SIGNAL_0
)
4492 /* Step inferior_ptid, with or without signal. */
4493 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
4496 /* And continue others without a signal. */
4497 append_resumption (p
, endp
, ptid
, /*step=*/ 0, TARGET_SIGNAL_0
);
4501 /* Scheduler locking; resume only PTID. */
4502 append_resumption (p
, endp
, ptid
, step
, siggnal
);
4505 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
4510 /* In non-stop, the stub replies to vCont with "OK". The stop
4511 reply will be reported asynchronously by means of a `%Stop'
4513 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4514 if (strcmp (rs
->buf
, "OK") != 0)
4515 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
4521 /* Tell the remote machine to resume. */
4523 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
4525 static int last_sent_step
;
4528 remote_resume (struct target_ops
*ops
,
4529 ptid_t ptid
, int step
, enum target_signal siggnal
)
4531 struct remote_state
*rs
= get_remote_state ();
4534 last_sent_signal
= siggnal
;
4535 last_sent_step
= step
;
4537 /* The vCont packet doesn't need to specify threads via Hc. */
4538 /* No reverse support (yet) for vCont. */
4539 if (execution_direction
!= EXEC_REVERSE
)
4540 if (remote_vcont_resume (ptid
, step
, siggnal
))
4543 /* All other supported resume packets do use Hc, so set the continue
4545 if (ptid_equal (ptid
, minus_one_ptid
))
4546 set_continue_thread (any_thread_ptid
);
4548 set_continue_thread (ptid
);
4551 if (execution_direction
== EXEC_REVERSE
)
4553 /* We don't pass signals to the target in reverse exec mode. */
4554 if (info_verbose
&& siggnal
!= TARGET_SIGNAL_0
)
4555 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
4559 && remote_protocol_packets
[PACKET_bs
].support
== PACKET_DISABLE
)
4560 error (_("Remote reverse-step not supported."));
4562 && remote_protocol_packets
[PACKET_bc
].support
== PACKET_DISABLE
)
4563 error (_("Remote reverse-continue not supported."));
4565 strcpy (buf
, step
? "bs" : "bc");
4567 else if (siggnal
!= TARGET_SIGNAL_0
)
4569 buf
[0] = step
? 'S' : 'C';
4570 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
4571 buf
[2] = tohex (((int) siggnal
) & 0xf);
4575 strcpy (buf
, step
? "s" : "c");
4580 /* We are about to start executing the inferior, let's register it
4581 with the event loop. NOTE: this is the one place where all the
4582 execution commands end up. We could alternatively do this in each
4583 of the execution commands in infcmd.c. */
4584 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
4585 into infcmd.c in order to allow inferior function calls to work
4586 NOT asynchronously. */
4587 if (target_can_async_p ())
4588 target_async (inferior_event_handler
, 0);
4590 /* We've just told the target to resume. The remote server will
4591 wait for the inferior to stop, and then send a stop reply. In
4592 the mean time, we can't start another command/query ourselves
4593 because the stub wouldn't be ready to process it. This applies
4594 only to the base all-stop protocol, however. In non-stop (which
4595 only supports vCont), the stub replies with an "OK", and is
4596 immediate able to process further serial input. */
4598 rs
->waiting_for_stop_reply
= 1;
4602 /* Set up the signal handler for SIGINT, while the target is
4603 executing, ovewriting the 'regular' SIGINT signal handler. */
4605 initialize_sigint_signal_handler (void)
4607 signal (SIGINT
, handle_remote_sigint
);
4610 /* Signal handler for SIGINT, while the target is executing. */
4612 handle_remote_sigint (int sig
)
4614 signal (sig
, handle_remote_sigint_twice
);
4615 mark_async_signal_handler_wrapper (sigint_remote_token
);
4618 /* Signal handler for SIGINT, installed after SIGINT has already been
4619 sent once. It will take effect the second time that the user sends
4622 handle_remote_sigint_twice (int sig
)
4624 signal (sig
, handle_remote_sigint
);
4625 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
4628 /* Perform the real interruption of the target execution, in response
4631 async_remote_interrupt (gdb_client_data arg
)
4634 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
4636 target_stop (inferior_ptid
);
4639 /* Perform interrupt, if the first attempt did not succeed. Just give
4640 up on the target alltogether. */
4642 async_remote_interrupt_twice (gdb_client_data arg
)
4645 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
4650 /* Reinstall the usual SIGINT handlers, after the target has
4653 cleanup_sigint_signal_handler (void *dummy
)
4655 signal (SIGINT
, handle_sigint
);
4658 /* Send ^C to target to halt it. Target will respond, and send us a
4660 static void (*ofunc
) (int);
4662 /* The command line interface's stop routine. This function is installed
4663 as a signal handler for SIGINT. The first time a user requests a
4664 stop, we call remote_stop to send a break or ^C. If there is no
4665 response from the target (it didn't stop when the user requested it),
4666 we ask the user if he'd like to detach from the target. */
4668 remote_interrupt (int signo
)
4670 /* If this doesn't work, try more severe steps. */
4671 signal (signo
, remote_interrupt_twice
);
4673 gdb_call_async_signal_handler (sigint_remote_token
, 1);
4676 /* The user typed ^C twice. */
4679 remote_interrupt_twice (int signo
)
4681 signal (signo
, ofunc
);
4682 gdb_call_async_signal_handler (sigint_remote_twice_token
, 1);
4683 signal (signo
, remote_interrupt
);
4686 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
4687 thread, all threads of a remote process, or all threads of all
4691 remote_stop_ns (ptid_t ptid
)
4693 struct remote_state
*rs
= get_remote_state ();
4695 char *endp
= rs
->buf
+ get_remote_packet_size ();
4697 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
4698 remote_vcont_probe (rs
);
4700 if (!rs
->support_vCont_t
)
4701 error (_("Remote server does not support stopping threads"));
4703 if (ptid_equal (ptid
, minus_one_ptid
)
4704 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
4705 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
4710 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
4712 if (ptid_is_pid (ptid
))
4713 /* All (-1) threads of process. */
4714 nptid
= ptid_build (ptid_get_pid (ptid
), 0, -1);
4717 /* Small optimization: if we already have a stop reply for
4718 this thread, no use in telling the stub we want this
4720 if (peek_stop_reply (ptid
))
4726 write_ptid (p
, endp
, nptid
);
4729 /* In non-stop, we get an immediate OK reply. The stop reply will
4730 come in asynchronously by notification. */
4732 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4733 if (strcmp (rs
->buf
, "OK") != 0)
4734 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
4737 /* All-stop version of target_stop. Sends a break or a ^C to stop the
4738 remote target. It is undefined which thread of which process
4739 reports the stop. */
4742 remote_stop_as (ptid_t ptid
)
4744 struct remote_state
*rs
= get_remote_state ();
4746 rs
->ctrlc_pending_p
= 1;
4748 /* If the inferior is stopped already, but the core didn't know
4749 about it yet, just ignore the request. The cached wait status
4750 will be collected in remote_wait. */
4751 if (rs
->cached_wait_status
)
4754 /* Send interrupt_sequence to remote target. */
4755 send_interrupt_sequence ();
4758 /* This is the generic stop called via the target vector. When a target
4759 interrupt is requested, either by the command line or the GUI, we
4760 will eventually end up here. */
4763 remote_stop (ptid_t ptid
)
4766 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
4769 remote_stop_ns (ptid
);
4771 remote_stop_as (ptid
);
4774 /* Ask the user what to do when an interrupt is received. */
4777 interrupt_query (void)
4779 target_terminal_ours ();
4781 if (target_can_async_p ())
4783 signal (SIGINT
, handle_sigint
);
4784 deprecated_throw_reason (RETURN_QUIT
);
4788 if (query (_("Interrupted while waiting for the program.\n\
4789 Give up (and stop debugging it)? ")))
4792 deprecated_throw_reason (RETURN_QUIT
);
4796 target_terminal_inferior ();
4799 /* Enable/disable target terminal ownership. Most targets can use
4800 terminal groups to control terminal ownership. Remote targets are
4801 different in that explicit transfer of ownership to/from GDB/target
4805 remote_terminal_inferior (void)
4807 if (!target_async_permitted
)
4808 /* Nothing to do. */
4811 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
4812 idempotent. The event-loop GDB talking to an asynchronous target
4813 with a synchronous command calls this function from both
4814 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
4815 transfer the terminal to the target when it shouldn't this guard
4817 if (!remote_async_terminal_ours_p
)
4819 delete_file_handler (input_fd
);
4820 remote_async_terminal_ours_p
= 0;
4821 initialize_sigint_signal_handler ();
4822 /* NOTE: At this point we could also register our selves as the
4823 recipient of all input. Any characters typed could then be
4824 passed on down to the target. */
4828 remote_terminal_ours (void)
4830 if (!target_async_permitted
)
4831 /* Nothing to do. */
4834 /* See FIXME in remote_terminal_inferior. */
4835 if (remote_async_terminal_ours_p
)
4837 cleanup_sigint_signal_handler (NULL
);
4838 add_file_handler (input_fd
, stdin_event_handler
, 0);
4839 remote_async_terminal_ours_p
= 1;
4843 remote_console_output (char *msg
)
4847 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
4850 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
4854 fputs_unfiltered (tb
, gdb_stdtarg
);
4856 gdb_flush (gdb_stdtarg
);
4859 typedef struct cached_reg
4862 gdb_byte data
[MAX_REGISTER_SIZE
];
4865 DEF_VEC_O(cached_reg_t
);
4869 struct stop_reply
*next
;
4873 struct target_waitstatus ws
;
4875 VEC(cached_reg_t
) *regcache
;
4877 int stopped_by_watchpoint_p
;
4878 CORE_ADDR watch_data_address
;
4886 /* The list of already fetched and acknowledged stop events. */
4887 static struct stop_reply
*stop_reply_queue
;
4889 static struct stop_reply
*
4890 stop_reply_xmalloc (void)
4892 struct stop_reply
*r
= XMALLOC (struct stop_reply
);
4899 stop_reply_xfree (struct stop_reply
*r
)
4903 VEC_free (cached_reg_t
, r
->regcache
);
4908 /* Discard all pending stop replies of inferior PID. If PID is -1,
4909 discard everything. */
4912 discard_pending_stop_replies (int pid
)
4914 struct stop_reply
*prev
= NULL
, *reply
, *next
;
4916 /* Discard the in-flight notification. */
4917 if (pending_stop_reply
!= NULL
4919 || ptid_get_pid (pending_stop_reply
->ptid
) == pid
))
4921 stop_reply_xfree (pending_stop_reply
);
4922 pending_stop_reply
= NULL
;
4925 /* Discard the stop replies we have already pulled with
4927 for (reply
= stop_reply_queue
; reply
; reply
= next
)
4931 || ptid_get_pid (reply
->ptid
) == pid
)
4933 if (reply
== stop_reply_queue
)
4934 stop_reply_queue
= reply
->next
;
4936 prev
->next
= reply
->next
;
4938 stop_reply_xfree (reply
);
4945 /* Cleanup wrapper. */
4948 do_stop_reply_xfree (void *arg
)
4950 struct stop_reply
*r
= arg
;
4952 stop_reply_xfree (r
);
4955 /* Look for a queued stop reply belonging to PTID. If one is found,
4956 remove it from the queue, and return it. Returns NULL if none is
4957 found. If there are still queued events left to process, tell the
4958 event loop to get back to target_wait soon. */
4960 static struct stop_reply
*
4961 queued_stop_reply (ptid_t ptid
)
4963 struct stop_reply
*it
;
4964 struct stop_reply
**it_link
;
4966 it
= stop_reply_queue
;
4967 it_link
= &stop_reply_queue
;
4970 if (ptid_match (it
->ptid
, ptid
))
4972 *it_link
= it
->next
;
4977 it_link
= &it
->next
;
4981 if (stop_reply_queue
)
4982 /* There's still at least an event left. */
4983 mark_async_event_handler (remote_async_inferior_event_token
);
4988 /* Push a fully parsed stop reply in the stop reply queue. Since we
4989 know that we now have at least one queued event left to pass to the
4990 core side, tell the event loop to get back to target_wait soon. */
4993 push_stop_reply (struct stop_reply
*new_event
)
4995 struct stop_reply
*event
;
4997 if (stop_reply_queue
)
4999 for (event
= stop_reply_queue
;
5000 event
&& event
->next
;
5001 event
= event
->next
)
5004 event
->next
= new_event
;
5007 stop_reply_queue
= new_event
;
5009 mark_async_event_handler (remote_async_inferior_event_token
);
5012 /* Returns true if we have a stop reply for PTID. */
5015 peek_stop_reply (ptid_t ptid
)
5017 struct stop_reply
*it
;
5019 for (it
= stop_reply_queue
; it
; it
= it
->next
)
5020 if (ptid_equal (ptid
, it
->ptid
))
5022 if (it
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
5029 /* Parse the stop reply in BUF. Either the function succeeds, and the
5030 result is stored in EVENT, or throws an error. */
5033 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
5035 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5039 event
->ptid
= null_ptid
;
5040 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
5041 event
->ws
.value
.integer
= 0;
5042 event
->solibs_changed
= 0;
5043 event
->replay_event
= 0;
5044 event
->stopped_by_watchpoint_p
= 0;
5045 event
->regcache
= NULL
;
5050 case 'T': /* Status with PC, SP, FP, ... */
5051 /* Expedited reply, containing Signal, {regno, reg} repeat. */
5052 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
5054 n... = register number
5055 r... = register contents
5058 p
= &buf
[3]; /* after Txx */
5066 /* If the packet contains a register number, save it in
5067 pnum and set p1 to point to the character following it.
5068 Otherwise p1 points to p. */
5070 /* If this packet is an awatch packet, don't parse the 'a'
5071 as a register number. */
5073 if (strncmp (p
, "awatch", strlen("awatch")) != 0
5074 && strncmp (p
, "core", strlen ("core") != 0))
5076 /* Read the ``P'' register number. */
5077 pnum
= strtol (p
, &p_temp
, 16);
5083 if (p1
== p
) /* No register number present here. */
5085 p1
= strchr (p
, ':');
5087 error (_("Malformed packet(a) (missing colon): %s\n\
5090 if (strncmp (p
, "thread", p1
- p
) == 0)
5091 event
->ptid
= read_ptid (++p1
, &p
);
5092 else if ((strncmp (p
, "watch", p1
- p
) == 0)
5093 || (strncmp (p
, "rwatch", p1
- p
) == 0)
5094 || (strncmp (p
, "awatch", p1
- p
) == 0))
5096 event
->stopped_by_watchpoint_p
= 1;
5097 p
= unpack_varlen_hex (++p1
, &addr
);
5098 event
->watch_data_address
= (CORE_ADDR
) addr
;
5100 else if (strncmp (p
, "library", p1
- p
) == 0)
5104 while (*p_temp
&& *p_temp
!= ';')
5107 event
->solibs_changed
= 1;
5110 else if (strncmp (p
, "replaylog", p1
- p
) == 0)
5112 /* NO_HISTORY event.
5113 p1 will indicate "begin" or "end", but
5114 it makes no difference for now, so ignore it. */
5115 event
->replay_event
= 1;
5116 p_temp
= strchr (p1
+ 1, ';');
5120 else if (strncmp (p
, "core", p1
- p
) == 0)
5124 p
= unpack_varlen_hex (++p1
, &c
);
5129 /* Silently skip unknown optional info. */
5130 p_temp
= strchr (p1
+ 1, ';');
5137 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
5138 cached_reg_t cached_reg
;
5143 error (_("Malformed packet(b) (missing colon): %s\n\
5149 error (_("Remote sent bad register number %s: %s\n\
5151 hex_string (pnum
), p
, buf
);
5153 cached_reg
.num
= reg
->regnum
;
5155 fieldsize
= hex2bin (p
, cached_reg
.data
,
5156 register_size (target_gdbarch
,
5159 if (fieldsize
< register_size (target_gdbarch
,
5161 warning (_("Remote reply is too short: %s"), buf
);
5163 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
5167 error (_("Remote register badly formatted: %s\nhere: %s"),
5172 case 'S': /* Old style status, just signal only. */
5173 if (event
->solibs_changed
)
5174 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
5175 else if (event
->replay_event
)
5176 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
5179 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
5180 event
->ws
.value
.sig
= (enum target_signal
)
5181 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
5184 case 'W': /* Target exited. */
5191 /* GDB used to accept only 2 hex chars here. Stubs should
5192 only send more if they detect GDB supports multi-process
5194 p
= unpack_varlen_hex (&buf
[1], &value
);
5198 /* The remote process exited. */
5199 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
5200 event
->ws
.value
.integer
= value
;
5204 /* The remote process exited with a signal. */
5205 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
5206 event
->ws
.value
.sig
= (enum target_signal
) value
;
5209 /* If no process is specified, assume inferior_ptid. */
5210 pid
= ptid_get_pid (inferior_ptid
);
5219 else if (strncmp (p
,
5220 "process:", sizeof ("process:") - 1) == 0)
5224 p
+= sizeof ("process:") - 1;
5225 unpack_varlen_hex (p
, &upid
);
5229 error (_("unknown stop reply packet: %s"), buf
);
5232 error (_("unknown stop reply packet: %s"), buf
);
5233 event
->ptid
= pid_to_ptid (pid
);
5238 if (non_stop
&& ptid_equal (event
->ptid
, null_ptid
))
5239 error (_("No process or thread specified in stop reply: %s"), buf
);
5242 /* When the stub wants to tell GDB about a new stop reply, it sends a
5243 stop notification (%Stop). Those can come it at any time, hence,
5244 we have to make sure that any pending putpkt/getpkt sequence we're
5245 making is finished, before querying the stub for more events with
5246 vStopped. E.g., if we started a vStopped sequence immediatelly
5247 upon receiving the %Stop notification, something like this could
5255 1.6) <-- (registers reply to step #1.3)
5257 Obviously, the reply in step #1.6 would be unexpected to a vStopped
5260 To solve this, whenever we parse a %Stop notification sucessfully,
5261 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
5262 doing whatever we were doing:
5268 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
5269 2.5) <-- (registers reply to step #2.3)
5271 Eventualy after step #2.5, we return to the event loop, which
5272 notices there's an event on the
5273 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
5274 associated callback --- the function below. At this point, we're
5275 always safe to start a vStopped sequence. :
5278 2.7) <-- T05 thread:2
5284 remote_get_pending_stop_replies (void)
5286 struct remote_state
*rs
= get_remote_state ();
5288 if (pending_stop_reply
)
5291 putpkt ("vStopped");
5293 /* Now we can rely on it. */
5294 push_stop_reply (pending_stop_reply
);
5295 pending_stop_reply
= NULL
;
5299 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5300 if (strcmp (rs
->buf
, "OK") == 0)
5304 struct cleanup
*old_chain
;
5305 struct stop_reply
*stop_reply
= stop_reply_xmalloc ();
5307 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
5308 remote_parse_stop_reply (rs
->buf
, stop_reply
);
5311 putpkt ("vStopped");
5313 if (stop_reply
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
5315 /* Now we can rely on it. */
5316 discard_cleanups (old_chain
);
5317 push_stop_reply (stop_reply
);
5320 /* We got an unknown stop reply. */
5321 do_cleanups (old_chain
);
5328 /* Called when it is decided that STOP_REPLY holds the info of the
5329 event that is to be returned to the core. This function always
5330 destroys STOP_REPLY. */
5333 process_stop_reply (struct stop_reply
*stop_reply
,
5334 struct target_waitstatus
*status
)
5338 *status
= stop_reply
->ws
;
5339 ptid
= stop_reply
->ptid
;
5341 /* If no thread/process was reported by the stub, assume the current
5343 if (ptid_equal (ptid
, null_ptid
))
5344 ptid
= inferior_ptid
;
5346 if (status
->kind
!= TARGET_WAITKIND_EXITED
5347 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
5349 /* Expedited registers. */
5350 if (stop_reply
->regcache
)
5352 struct regcache
*regcache
5353 = get_thread_arch_regcache (ptid
, target_gdbarch
);
5358 VEC_iterate(cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
5360 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
5361 VEC_free (cached_reg_t
, stop_reply
->regcache
);
5364 remote_stopped_by_watchpoint_p
= stop_reply
->stopped_by_watchpoint_p
;
5365 remote_watch_data_address
= stop_reply
->watch_data_address
;
5367 remote_notice_new_inferior (ptid
, 0);
5368 demand_private_info (ptid
)->core
= stop_reply
->core
;
5371 stop_reply_xfree (stop_reply
);
5375 /* The non-stop mode version of target_wait. */
5378 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
5380 struct remote_state
*rs
= get_remote_state ();
5381 struct stop_reply
*stop_reply
;
5384 /* If in non-stop mode, get out of getpkt even if a
5385 notification is received. */
5387 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
5394 case 'E': /* Error of some sort. */
5395 /* We're out of sync with the target now. Did it continue
5396 or not? We can't tell which thread it was in non-stop,
5397 so just ignore this. */
5398 warning (_("Remote failure reply: %s"), rs
->buf
);
5400 case 'O': /* Console output. */
5401 remote_console_output (rs
->buf
+ 1);
5404 warning (_("Invalid remote reply: %s"), rs
->buf
);
5408 /* Acknowledge a pending stop reply that may have arrived in the
5410 if (pending_stop_reply
!= NULL
)
5411 remote_get_pending_stop_replies ();
5413 /* If indeed we noticed a stop reply, we're done. */
5414 stop_reply
= queued_stop_reply (ptid
);
5415 if (stop_reply
!= NULL
)
5416 return process_stop_reply (stop_reply
, status
);
5418 /* Still no event. If we're just polling for an event, then
5419 return to the event loop. */
5420 if (options
& TARGET_WNOHANG
)
5422 status
->kind
= TARGET_WAITKIND_IGNORE
;
5423 return minus_one_ptid
;
5426 /* Otherwise do a blocking wait. */
5427 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
5432 /* Wait until the remote machine stops, then return, storing status in
5433 STATUS just as `wait' would. */
5436 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
5438 struct remote_state
*rs
= get_remote_state ();
5439 ptid_t event_ptid
= null_ptid
;
5441 struct stop_reply
*stop_reply
;
5445 status
->kind
= TARGET_WAITKIND_IGNORE
;
5446 status
->value
.integer
= 0;
5448 stop_reply
= queued_stop_reply (ptid
);
5449 if (stop_reply
!= NULL
)
5450 return process_stop_reply (stop_reply
, status
);
5452 if (rs
->cached_wait_status
)
5453 /* Use the cached wait status, but only once. */
5454 rs
->cached_wait_status
= 0;
5459 if (!target_is_async_p ())
5461 ofunc
= signal (SIGINT
, remote_interrupt
);
5462 /* If the user hit C-c before this packet, or between packets,
5463 pretend that it was hit right here. */
5467 remote_interrupt (SIGINT
);
5471 /* FIXME: cagney/1999-09-27: If we're in async mode we should
5472 _never_ wait for ever -> test on target_is_async_p().
5473 However, before we do that we need to ensure that the caller
5474 knows how to take the target into/out of async mode. */
5475 ret
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, wait_forever_enabled_p
);
5476 if (!target_is_async_p ())
5477 signal (SIGINT
, ofunc
);
5482 remote_stopped_by_watchpoint_p
= 0;
5484 /* We got something. */
5485 rs
->waiting_for_stop_reply
= 0;
5487 /* Assume that the target has acknowledged Ctrl-C unless we receive
5488 an 'F' or 'O' packet. */
5489 if (buf
[0] != 'F' && buf
[0] != 'O')
5490 rs
->ctrlc_pending_p
= 0;
5494 case 'E': /* Error of some sort. */
5495 /* We're out of sync with the target now. Did it continue or
5496 not? Not is more likely, so report a stop. */
5497 warning (_("Remote failure reply: %s"), buf
);
5498 status
->kind
= TARGET_WAITKIND_STOPPED
;
5499 status
->value
.sig
= TARGET_SIGNAL_0
;
5501 case 'F': /* File-I/O request. */
5502 remote_fileio_request (buf
, rs
->ctrlc_pending_p
);
5503 rs
->ctrlc_pending_p
= 0;
5505 case 'T': case 'S': case 'X': case 'W':
5507 struct stop_reply
*stop_reply
;
5508 struct cleanup
*old_chain
;
5510 stop_reply
= stop_reply_xmalloc ();
5511 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
5512 remote_parse_stop_reply (buf
, stop_reply
);
5513 discard_cleanups (old_chain
);
5514 event_ptid
= process_stop_reply (stop_reply
, status
);
5517 case 'O': /* Console output. */
5518 remote_console_output (buf
+ 1);
5520 /* The target didn't really stop; keep waiting. */
5521 rs
->waiting_for_stop_reply
= 1;
5525 if (last_sent_signal
!= TARGET_SIGNAL_0
)
5527 /* Zero length reply means that we tried 'S' or 'C' and the
5528 remote system doesn't support it. */
5529 target_terminal_ours_for_output ();
5531 ("Can't send signals to this remote system. %s not sent.\n",
5532 target_signal_to_name (last_sent_signal
));
5533 last_sent_signal
= TARGET_SIGNAL_0
;
5534 target_terminal_inferior ();
5536 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
5537 putpkt ((char *) buf
);
5539 /* We just told the target to resume, so a stop reply is in
5541 rs
->waiting_for_stop_reply
= 1;
5544 /* else fallthrough */
5546 warning (_("Invalid remote reply: %s"), buf
);
5548 rs
->waiting_for_stop_reply
= 1;
5552 if (status
->kind
== TARGET_WAITKIND_IGNORE
)
5554 /* Nothing interesting happened. If we're doing a non-blocking
5555 poll, we're done. Otherwise, go back to waiting. */
5556 if (options
& TARGET_WNOHANG
)
5557 return minus_one_ptid
;
5561 else if (status
->kind
!= TARGET_WAITKIND_EXITED
5562 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
5564 if (!ptid_equal (event_ptid
, null_ptid
))
5565 record_currthread (event_ptid
);
5567 event_ptid
= inferior_ptid
;
5570 /* A process exit. Invalidate our notion of current thread. */
5571 record_currthread (minus_one_ptid
);
5576 /* Wait until the remote machine stops, then return, storing status in
5577 STATUS just as `wait' would. */
5580 remote_wait (struct target_ops
*ops
,
5581 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
5586 event_ptid
= remote_wait_ns (ptid
, status
, options
);
5588 event_ptid
= remote_wait_as (ptid
, status
, options
);
5590 if (target_can_async_p ())
5592 /* If there are are events left in the queue tell the event loop
5594 if (stop_reply_queue
)
5595 mark_async_event_handler (remote_async_inferior_event_token
);
5601 /* Fetch a single register using a 'p' packet. */
5604 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
5606 struct remote_state
*rs
= get_remote_state ();
5608 char regp
[MAX_REGISTER_SIZE
];
5611 if (remote_protocol_packets
[PACKET_p
].support
== PACKET_DISABLE
)
5614 if (reg
->pnum
== -1)
5619 p
+= hexnumstr (p
, reg
->pnum
);
5622 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5626 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
5630 case PACKET_UNKNOWN
:
5633 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
5634 gdbarch_register_name (get_regcache_arch (regcache
),
5639 /* If this register is unfetchable, tell the regcache. */
5642 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
5646 /* Otherwise, parse and supply the value. */
5652 error (_("fetch_register_using_p: early buf termination"));
5654 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
5657 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
5661 /* Fetch the registers included in the target's 'g' packet. */
5664 send_g_packet (void)
5666 struct remote_state
*rs
= get_remote_state ();
5669 sprintf (rs
->buf
, "g");
5670 remote_send (&rs
->buf
, &rs
->buf_size
);
5672 /* We can get out of synch in various cases. If the first character
5673 in the buffer is not a hex character, assume that has happened
5674 and try to fetch another packet to read. */
5675 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
5676 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
5677 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
5678 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
5681 fprintf_unfiltered (gdb_stdlog
,
5682 "Bad register packet; fetching a new packet\n");
5683 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5686 buf_len
= strlen (rs
->buf
);
5688 /* Sanity check the received packet. */
5689 if (buf_len
% 2 != 0)
5690 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
5696 process_g_packet (struct regcache
*regcache
)
5698 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
5699 struct remote_state
*rs
= get_remote_state ();
5700 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5705 buf_len
= strlen (rs
->buf
);
5707 /* Further sanity checks, with knowledge of the architecture. */
5708 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
5709 error (_("Remote 'g' packet reply is too long: %s"), rs
->buf
);
5711 /* Save the size of the packet sent to us by the target. It is used
5712 as a heuristic when determining the max size of packets that the
5713 target can safely receive. */
5714 if (rsa
->actual_register_packet_size
== 0)
5715 rsa
->actual_register_packet_size
= buf_len
;
5717 /* If this is smaller than we guessed the 'g' packet would be,
5718 update our records. A 'g' reply that doesn't include a register's
5719 value implies either that the register is not available, or that
5720 the 'p' packet must be used. */
5721 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
5723 rsa
->sizeof_g_packet
= buf_len
/ 2;
5725 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
5727 if (rsa
->regs
[i
].pnum
== -1)
5730 if (rsa
->regs
[i
].offset
>= rsa
->sizeof_g_packet
)
5731 rsa
->regs
[i
].in_g_packet
= 0;
5733 rsa
->regs
[i
].in_g_packet
= 1;
5737 regs
= alloca (rsa
->sizeof_g_packet
);
5739 /* Unimplemented registers read as all bits zero. */
5740 memset (regs
, 0, rsa
->sizeof_g_packet
);
5742 /* Reply describes registers byte by byte, each byte encoded as two
5743 hex characters. Suck them all up, then supply them to the
5744 register cacheing/storage mechanism. */
5747 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
5749 if (p
[0] == 0 || p
[1] == 0)
5750 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
5751 internal_error (__FILE__
, __LINE__
,
5752 _("unexpected end of 'g' packet reply"));
5754 if (p
[0] == 'x' && p
[1] == 'x')
5755 regs
[i
] = 0; /* 'x' */
5757 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
5761 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
5763 struct packet_reg
*r
= &rsa
->regs
[i
];
5767 if (r
->offset
* 2 >= strlen (rs
->buf
))
5768 /* This shouldn't happen - we adjusted in_g_packet above. */
5769 internal_error (__FILE__
, __LINE__
,
5770 _("unexpected end of 'g' packet reply"));
5771 else if (rs
->buf
[r
->offset
* 2] == 'x')
5773 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
5774 /* The register isn't available, mark it as such (at
5775 the same time setting the value to zero). */
5776 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
5779 regcache_raw_supply (regcache
, r
->regnum
,
5786 fetch_registers_using_g (struct regcache
*regcache
)
5789 process_g_packet (regcache
);
5792 /* Make the remote selected traceframe match GDB's selected
5796 set_remote_traceframe (void)
5800 if (remote_traceframe_number
== get_traceframe_number ())
5803 /* Avoid recursion, remote_trace_find calls us again. */
5804 remote_traceframe_number
= get_traceframe_number ();
5806 newnum
= target_trace_find (tfind_number
,
5807 get_traceframe_number (), 0, 0, NULL
);
5809 /* Should not happen. If it does, all bets are off. */
5810 if (newnum
!= get_traceframe_number ())
5811 warning (_("could not set remote traceframe"));
5815 remote_fetch_registers (struct target_ops
*ops
,
5816 struct regcache
*regcache
, int regnum
)
5818 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5821 set_remote_traceframe ();
5822 set_general_thread (inferior_ptid
);
5826 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5828 gdb_assert (reg
!= NULL
);
5830 /* If this register might be in the 'g' packet, try that first -
5831 we are likely to read more than one register. If this is the
5832 first 'g' packet, we might be overly optimistic about its
5833 contents, so fall back to 'p'. */
5834 if (reg
->in_g_packet
)
5836 fetch_registers_using_g (regcache
);
5837 if (reg
->in_g_packet
)
5841 if (fetch_register_using_p (regcache
, reg
))
5844 /* This register is not available. */
5845 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
5850 fetch_registers_using_g (regcache
);
5852 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5853 if (!rsa
->regs
[i
].in_g_packet
)
5854 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
5856 /* This register is not available. */
5857 regcache_raw_supply (regcache
, i
, NULL
);
5861 /* Prepare to store registers. Since we may send them all (using a
5862 'G' request), we have to read out the ones we don't want to change
5866 remote_prepare_to_store (struct regcache
*regcache
)
5868 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5870 gdb_byte buf
[MAX_REGISTER_SIZE
];
5872 /* Make sure the entire registers array is valid. */
5873 switch (remote_protocol_packets
[PACKET_P
].support
)
5875 case PACKET_DISABLE
:
5876 case PACKET_SUPPORT_UNKNOWN
:
5877 /* Make sure all the necessary registers are cached. */
5878 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5879 if (rsa
->regs
[i
].in_g_packet
)
5880 regcache_raw_read (regcache
, rsa
->regs
[i
].regnum
, buf
);
5887 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
5888 packet was not recognized. */
5891 store_register_using_P (const struct regcache
*regcache
,
5892 struct packet_reg
*reg
)
5894 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
5895 struct remote_state
*rs
= get_remote_state ();
5896 /* Try storing a single register. */
5897 char *buf
= rs
->buf
;
5898 gdb_byte regp
[MAX_REGISTER_SIZE
];
5901 if (remote_protocol_packets
[PACKET_P
].support
== PACKET_DISABLE
)
5904 if (reg
->pnum
== -1)
5907 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
5908 p
= buf
+ strlen (buf
);
5909 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
5910 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
5912 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5914 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
5919 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
5920 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
5921 case PACKET_UNKNOWN
:
5924 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
5928 /* Store register REGNUM, or all registers if REGNUM == -1, from the
5929 contents of the register cache buffer. FIXME: ignores errors. */
5932 store_registers_using_G (const struct regcache
*regcache
)
5934 struct remote_state
*rs
= get_remote_state ();
5935 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5939 /* Extract all the registers in the regcache copying them into a
5944 regs
= alloca (rsa
->sizeof_g_packet
);
5945 memset (regs
, 0, rsa
->sizeof_g_packet
);
5946 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5948 struct packet_reg
*r
= &rsa
->regs
[i
];
5951 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
5955 /* Command describes registers byte by byte,
5956 each byte encoded as two hex characters. */
5959 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
5961 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
5963 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5964 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
5965 error (_("Could not write registers; remote failure reply '%s'"),
5969 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
5970 of the register cache buffer. FIXME: ignores errors. */
5973 remote_store_registers (struct target_ops
*ops
,
5974 struct regcache
*regcache
, int regnum
)
5976 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5979 set_remote_traceframe ();
5980 set_general_thread (inferior_ptid
);
5984 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5986 gdb_assert (reg
!= NULL
);
5988 /* Always prefer to store registers using the 'P' packet if
5989 possible; we often change only a small number of registers.
5990 Sometimes we change a larger number; we'd need help from a
5991 higher layer to know to use 'G'. */
5992 if (store_register_using_P (regcache
, reg
))
5995 /* For now, don't complain if we have no way to write the
5996 register. GDB loses track of unavailable registers too
5997 easily. Some day, this may be an error. We don't have
5998 any way to read the register, either... */
5999 if (!reg
->in_g_packet
)
6002 store_registers_using_G (regcache
);
6006 store_registers_using_G (regcache
);
6008 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
6009 if (!rsa
->regs
[i
].in_g_packet
)
6010 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
6011 /* See above for why we do not issue an error here. */
6016 /* Return the number of hex digits in num. */
6019 hexnumlen (ULONGEST num
)
6023 for (i
= 0; num
!= 0; i
++)
6029 /* Set BUF to the minimum number of hex digits representing NUM. */
6032 hexnumstr (char *buf
, ULONGEST num
)
6034 int len
= hexnumlen (num
);
6036 return hexnumnstr (buf
, num
, len
);
6040 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
6043 hexnumnstr (char *buf
, ULONGEST num
, int width
)
6049 for (i
= width
- 1; i
>= 0; i
--)
6051 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
6058 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
6061 remote_address_masked (CORE_ADDR addr
)
6063 int address_size
= remote_address_size
;
6065 /* If "remoteaddresssize" was not set, default to target address size. */
6067 address_size
= gdbarch_addr_bit (target_gdbarch
);
6069 if (address_size
> 0
6070 && address_size
< (sizeof (ULONGEST
) * 8))
6072 /* Only create a mask when that mask can safely be constructed
6073 in a ULONGEST variable. */
6076 mask
= (mask
<< address_size
) - 1;
6082 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
6083 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
6084 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
6085 (which may be more than *OUT_LEN due to escape characters). The
6086 total number of bytes in the output buffer will be at most
6090 remote_escape_output (const gdb_byte
*buffer
, int len
,
6091 gdb_byte
*out_buf
, int *out_len
,
6094 int input_index
, output_index
;
6097 for (input_index
= 0; input_index
< len
; input_index
++)
6099 gdb_byte b
= buffer
[input_index
];
6101 if (b
== '$' || b
== '#' || b
== '}')
6103 /* These must be escaped. */
6104 if (output_index
+ 2 > out_maxlen
)
6106 out_buf
[output_index
++] = '}';
6107 out_buf
[output_index
++] = b
^ 0x20;
6111 if (output_index
+ 1 > out_maxlen
)
6113 out_buf
[output_index
++] = b
;
6117 *out_len
= input_index
;
6118 return output_index
;
6121 /* Convert BUFFER, escaped data LEN bytes long, into binary data
6122 in OUT_BUF. Return the number of bytes written to OUT_BUF.
6123 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
6125 This function reverses remote_escape_output. It allows more
6126 escaped characters than that function does, in particular because
6127 '*' must be escaped to avoid the run-length encoding processing
6128 in reading packets. */
6131 remote_unescape_input (const gdb_byte
*buffer
, int len
,
6132 gdb_byte
*out_buf
, int out_maxlen
)
6134 int input_index
, output_index
;
6139 for (input_index
= 0; input_index
< len
; input_index
++)
6141 gdb_byte b
= buffer
[input_index
];
6143 if (output_index
+ 1 > out_maxlen
)
6145 warning (_("Received too much data from remote target;"
6146 " ignoring overflow."));
6147 return output_index
;
6152 out_buf
[output_index
++] = b
^ 0x20;
6158 out_buf
[output_index
++] = b
;
6162 error (_("Unmatched escape character in target response."));
6164 return output_index
;
6167 /* Determine whether the remote target supports binary downloading.
6168 This is accomplished by sending a no-op memory write of zero length
6169 to the target at the specified address. It does not suffice to send
6170 the whole packet, since many stubs strip the eighth bit and
6171 subsequently compute a wrong checksum, which causes real havoc with
6174 NOTE: This can still lose if the serial line is not eight-bit
6175 clean. In cases like this, the user should clear "remote
6179 check_binary_download (CORE_ADDR addr
)
6181 struct remote_state
*rs
= get_remote_state ();
6183 switch (remote_protocol_packets
[PACKET_X
].support
)
6185 case PACKET_DISABLE
:
6189 case PACKET_SUPPORT_UNKNOWN
:
6195 p
+= hexnumstr (p
, (ULONGEST
) addr
);
6197 p
+= hexnumstr (p
, (ULONGEST
) 0);
6201 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
6202 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6204 if (rs
->buf
[0] == '\0')
6207 fprintf_unfiltered (gdb_stdlog
,
6208 "binary downloading NOT "
6209 "supported by target\n");
6210 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
6215 fprintf_unfiltered (gdb_stdlog
,
6216 "binary downloading suppported by target\n");
6217 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
6224 /* Write memory data directly to the remote machine.
6225 This does not inform the data cache; the data cache uses this.
6226 HEADER is the starting part of the packet.
6227 MEMADDR is the address in the remote memory space.
6228 MYADDR is the address of the buffer in our space.
6229 LEN is the number of bytes.
6230 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
6231 should send data as binary ('X'), or hex-encoded ('M').
6233 The function creates packet of the form
6234 <HEADER><ADDRESS>,<LENGTH>:<DATA>
6236 where encoding of <DATA> is termined by PACKET_FORMAT.
6238 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
6241 Returns the number of bytes transferred, or 0 (setting errno) for
6242 error. Only transfer a single packet. */
6245 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
6246 const gdb_byte
*myaddr
, int len
,
6247 char packet_format
, int use_length
)
6249 struct remote_state
*rs
= get_remote_state ();
6259 if (packet_format
!= 'X' && packet_format
!= 'M')
6260 internal_error (__FILE__
, __LINE__
,
6261 _("remote_write_bytes_aux: bad packet format"));
6266 payload_size
= get_memory_write_packet_size ();
6268 /* The packet buffer will be large enough for the payload;
6269 get_memory_packet_size ensures this. */
6272 /* Compute the size of the actual payload by subtracting out the
6273 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
6275 payload_size
-= strlen ("$,:#NN");
6277 /* The comma won't be used. */
6279 header_length
= strlen (header
);
6280 payload_size
-= header_length
;
6281 payload_size
-= hexnumlen (memaddr
);
6283 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
6285 strcat (rs
->buf
, header
);
6286 p
= rs
->buf
+ strlen (header
);
6288 /* Compute a best guess of the number of bytes actually transfered. */
6289 if (packet_format
== 'X')
6291 /* Best guess at number of bytes that will fit. */
6292 todo
= min (len
, payload_size
);
6294 payload_size
-= hexnumlen (todo
);
6295 todo
= min (todo
, payload_size
);
6299 /* Num bytes that will fit. */
6300 todo
= min (len
, payload_size
/ 2);
6302 payload_size
-= hexnumlen (todo
);
6303 todo
= min (todo
, payload_size
/ 2);
6307 internal_error (__FILE__
, __LINE__
,
6308 _("minumum packet size too small to write data"));
6310 /* If we already need another packet, then try to align the end
6311 of this packet to a useful boundary. */
6312 if (todo
> 2 * REMOTE_ALIGN_WRITES
&& todo
< len
)
6313 todo
= ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
6315 /* Append "<memaddr>". */
6316 memaddr
= remote_address_masked (memaddr
);
6317 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
6324 /* Append <len>. Retain the location/size of <len>. It may need to
6325 be adjusted once the packet body has been created. */
6327 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
6335 /* Append the packet body. */
6336 if (packet_format
== 'X')
6338 /* Binary mode. Send target system values byte by byte, in
6339 increasing byte addresses. Only escape certain critical
6341 payload_length
= remote_escape_output (myaddr
, todo
, p
, &nr_bytes
,
6344 /* If not all TODO bytes fit, then we'll need another packet. Make
6345 a second try to keep the end of the packet aligned. Don't do
6346 this if the packet is tiny. */
6347 if (nr_bytes
< todo
&& nr_bytes
> 2 * REMOTE_ALIGN_WRITES
)
6351 new_nr_bytes
= (((memaddr
+ nr_bytes
) & ~(REMOTE_ALIGN_WRITES
- 1))
6353 if (new_nr_bytes
!= nr_bytes
)
6354 payload_length
= remote_escape_output (myaddr
, new_nr_bytes
,
6359 p
+= payload_length
;
6360 if (use_length
&& nr_bytes
< todo
)
6362 /* Escape chars have filled up the buffer prematurely,
6363 and we have actually sent fewer bytes than planned.
6364 Fix-up the length field of the packet. Use the same
6365 number of characters as before. */
6366 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
6367 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
6372 /* Normal mode: Send target system values byte by byte, in
6373 increasing byte addresses. Each byte is encoded as a two hex
6375 nr_bytes
= bin2hex (myaddr
, p
, todo
);
6379 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
6380 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6382 if (rs
->buf
[0] == 'E')
6384 /* There is no correspondance between what the remote protocol
6385 uses for errors and errno codes. We would like a cleaner way
6386 of representing errors (big enough to include errno codes,
6387 bfd_error codes, and others). But for now just return EIO. */
6392 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
6393 fewer bytes than we'd planned. */
6397 /* Write memory data directly to the remote machine.
6398 This does not inform the data cache; the data cache uses this.
6399 MEMADDR is the address in the remote memory space.
6400 MYADDR is the address of the buffer in our space.
6401 LEN is the number of bytes.
6403 Returns number of bytes transferred, or 0 (setting errno) for
6404 error. Only transfer a single packet. */
6407 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, int len
)
6409 char *packet_format
= 0;
6411 /* Check whether the target supports binary download. */
6412 check_binary_download (memaddr
);
6414 switch (remote_protocol_packets
[PACKET_X
].support
)
6417 packet_format
= "X";
6419 case PACKET_DISABLE
:
6420 packet_format
= "M";
6422 case PACKET_SUPPORT_UNKNOWN
:
6423 internal_error (__FILE__
, __LINE__
,
6424 _("remote_write_bytes: bad internal state"));
6426 internal_error (__FILE__
, __LINE__
, _("bad switch"));
6429 return remote_write_bytes_aux (packet_format
,
6430 memaddr
, myaddr
, len
, packet_format
[0], 1);
6433 /* Read memory data directly from the remote machine.
6434 This does not use the data cache; the data cache uses this.
6435 MEMADDR is the address in the remote memory space.
6436 MYADDR is the address of the buffer in our space.
6437 LEN is the number of bytes.
6439 Returns number of bytes transferred, or 0 for error. */
6442 remote_read_bytes (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
6444 struct remote_state
*rs
= get_remote_state ();
6445 int max_buf_size
; /* Max size of packet output buffer. */
6453 max_buf_size
= get_memory_read_packet_size ();
6454 /* The packet buffer will be large enough for the payload;
6455 get_memory_packet_size ensures this. */
6457 /* Number if bytes that will fit. */
6458 todo
= min (len
, max_buf_size
/ 2);
6460 /* Construct "m"<memaddr>","<len>". */
6461 memaddr
= remote_address_masked (memaddr
);
6464 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
6466 p
+= hexnumstr (p
, (ULONGEST
) todo
);
6469 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6470 if (rs
->buf
[0] == 'E'
6471 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
6472 && rs
->buf
[3] == '\0')
6474 /* There is no correspondance between what the remote protocol
6475 uses for errors and errno codes. We would like a cleaner way
6476 of representing errors (big enough to include errno codes,
6477 bfd_error codes, and others). But for now just return
6482 /* Reply describes memory byte by byte, each byte encoded as two hex
6485 i
= hex2bin (p
, myaddr
, todo
);
6486 /* Return what we have. Let higher layers handle partial reads. */
6491 /* Remote notification handler. */
6494 handle_notification (char *buf
, size_t length
)
6496 if (strncmp (buf
, "Stop:", 5) == 0)
6498 if (pending_stop_reply
)
6500 /* We've already parsed the in-flight stop-reply, but the
6501 stub for some reason thought we didn't, possibly due to
6502 timeout on its side. Just ignore it. */
6504 fprintf_unfiltered (gdb_stdlog
, "ignoring resent notification\n");
6508 struct cleanup
*old_chain
;
6509 struct stop_reply
*reply
= stop_reply_xmalloc ();
6511 old_chain
= make_cleanup (do_stop_reply_xfree
, reply
);
6513 remote_parse_stop_reply (buf
+ 5, reply
);
6515 discard_cleanups (old_chain
);
6517 /* Be careful to only set it after parsing, since an error
6518 may be thrown then. */
6519 pending_stop_reply
= reply
;
6521 /* Notify the event loop there's a stop reply to acknowledge
6522 and that there may be more events to fetch. */
6523 mark_async_event_handler (remote_async_get_pending_events_token
);
6526 fprintf_unfiltered (gdb_stdlog
, "stop notification captured\n");
6530 /* We ignore notifications we don't recognize, for compatibility
6531 with newer stubs. */
6536 /* Read or write LEN bytes from inferior memory at MEMADDR,
6537 transferring to or from debugger address BUFFER. Write to inferior
6538 if SHOULD_WRITE is nonzero. Returns length of data written or
6539 read; 0 for error. TARGET is unused. */
6542 remote_xfer_memory (CORE_ADDR mem_addr
, gdb_byte
*buffer
, int mem_len
,
6543 int should_write
, struct mem_attrib
*attrib
,
6544 struct target_ops
*target
)
6548 set_remote_traceframe ();
6549 set_general_thread (inferior_ptid
);
6552 res
= remote_write_bytes (mem_addr
, buffer
, mem_len
);
6554 res
= remote_read_bytes (mem_addr
, buffer
, mem_len
);
6559 /* Sends a packet with content determined by the printf format string
6560 FORMAT and the remaining arguments, then gets the reply. Returns
6561 whether the packet was a success, a failure, or unknown. */
6563 static enum packet_result
6564 remote_send_printf (const char *format
, ...)
6566 struct remote_state
*rs
= get_remote_state ();
6567 int max_size
= get_remote_packet_size ();
6570 va_start (ap
, format
);
6573 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
6574 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
6576 if (putpkt (rs
->buf
) < 0)
6577 error (_("Communication problem with target."));
6580 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6582 return packet_check_result (rs
->buf
);
6586 restore_remote_timeout (void *p
)
6588 int value
= *(int *)p
;
6590 remote_timeout
= value
;
6593 /* Flash writing can take quite some time. We'll set
6594 effectively infinite timeout for flash operations.
6595 In future, we'll need to decide on a better approach. */
6596 static const int remote_flash_timeout
= 1000;
6599 remote_flash_erase (struct target_ops
*ops
,
6600 ULONGEST address
, LONGEST length
)
6602 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
6603 int saved_remote_timeout
= remote_timeout
;
6604 enum packet_result ret
;
6605 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
6606 &saved_remote_timeout
);
6608 remote_timeout
= remote_flash_timeout
;
6610 ret
= remote_send_printf ("vFlashErase:%s,%s",
6611 phex (address
, addr_size
),
6615 case PACKET_UNKNOWN
:
6616 error (_("Remote target does not support flash erase"));
6618 error (_("Error erasing flash with vFlashErase packet"));
6623 do_cleanups (back_to
);
6627 remote_flash_write (struct target_ops
*ops
,
6628 ULONGEST address
, LONGEST length
,
6629 const gdb_byte
*data
)
6631 int saved_remote_timeout
= remote_timeout
;
6633 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
6634 &saved_remote_timeout
);
6636 remote_timeout
= remote_flash_timeout
;
6637 ret
= remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 'X', 0);
6638 do_cleanups (back_to
);
6644 remote_flash_done (struct target_ops
*ops
)
6646 int saved_remote_timeout
= remote_timeout
;
6648 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
6649 &saved_remote_timeout
);
6651 remote_timeout
= remote_flash_timeout
;
6652 ret
= remote_send_printf ("vFlashDone");
6653 do_cleanups (back_to
);
6657 case PACKET_UNKNOWN
:
6658 error (_("Remote target does not support vFlashDone"));
6660 error (_("Error finishing flash operation"));
6667 remote_files_info (struct target_ops
*ignore
)
6669 puts_filtered ("Debugging a target over a serial line.\n");
6672 /* Stuff for dealing with the packets which are part of this protocol.
6673 See comment at top of file for details. */
6675 /* Read a single character from the remote end. */
6678 readchar (int timeout
)
6682 ch
= serial_readchar (remote_desc
, timeout
);
6687 switch ((enum serial_rc
) ch
)
6691 error (_("Remote connection closed"));
6695 perror_with_name (_("Remote communication error. "
6696 "Target disconnected."));
6698 case SERIAL_TIMEOUT
:
6704 /* Send the command in *BUF to the remote machine, and read the reply
6705 into *BUF. Report an error if we get an error reply. Resize
6706 *BUF using xrealloc if necessary to hold the result, and update
6710 remote_send (char **buf
,
6714 getpkt (buf
, sizeof_buf
, 0);
6716 if ((*buf
)[0] == 'E')
6717 error (_("Remote failure reply: %s"), *buf
);
6720 /* Return a pointer to an xmalloc'ed string representing an escaped
6721 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
6722 etc. The caller is responsible for releasing the returned
6726 escape_buffer (const char *buf
, int n
)
6728 struct cleanup
*old_chain
;
6729 struct ui_file
*stb
;
6732 stb
= mem_fileopen ();
6733 old_chain
= make_cleanup_ui_file_delete (stb
);
6735 fputstrn_unfiltered (buf
, n
, 0, stb
);
6736 str
= ui_file_xstrdup (stb
, NULL
);
6737 do_cleanups (old_chain
);
6741 /* Display a null-terminated packet on stdout, for debugging, using C
6745 print_packet (char *buf
)
6747 puts_filtered ("\"");
6748 fputstr_filtered (buf
, '"', gdb_stdout
);
6749 puts_filtered ("\"");
6755 return putpkt_binary (buf
, strlen (buf
));
6758 /* Send a packet to the remote machine, with error checking. The data
6759 of the packet is in BUF. The string in BUF can be at most
6760 get_remote_packet_size () - 5 to account for the $, # and checksum,
6761 and for a possible /0 if we are debugging (remote_debug) and want
6762 to print the sent packet as a string. */
6765 putpkt_binary (char *buf
, int cnt
)
6767 struct remote_state
*rs
= get_remote_state ();
6769 unsigned char csum
= 0;
6770 char *buf2
= alloca (cnt
+ 6);
6776 /* Catch cases like trying to read memory or listing threads while
6777 we're waiting for a stop reply. The remote server wouldn't be
6778 ready to handle this request, so we'd hang and timeout. We don't
6779 have to worry about this in synchronous mode, because in that
6780 case it's not possible to issue a command while the target is
6781 running. This is not a problem in non-stop mode, because in that
6782 case, the stub is always ready to process serial input. */
6783 if (!non_stop
&& target_can_async_p () && rs
->waiting_for_stop_reply
)
6784 error (_("Cannot execute this command while the target is running."));
6786 /* We're sending out a new packet. Make sure we don't look at a
6787 stale cached response. */
6788 rs
->cached_wait_status
= 0;
6790 /* Copy the packet into buffer BUF2, encapsulating it
6791 and giving it a checksum. */
6796 for (i
= 0; i
< cnt
; i
++)
6802 *p
++ = tohex ((csum
>> 4) & 0xf);
6803 *p
++ = tohex (csum
& 0xf);
6805 /* Send it over and over until we get a positive ack. */
6809 int started_error_output
= 0;
6813 struct cleanup
*old_chain
;
6817 str
= escape_buffer (buf2
, p
- buf2
);
6818 old_chain
= make_cleanup (xfree
, str
);
6819 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s...", str
);
6820 gdb_flush (gdb_stdlog
);
6821 do_cleanups (old_chain
);
6823 if (serial_write (remote_desc
, buf2
, p
- buf2
))
6824 perror_with_name (_("putpkt: write failed"));
6826 /* If this is a no acks version of the remote protocol, send the
6827 packet and move on. */
6831 /* Read until either a timeout occurs (-2) or '+' is read.
6832 Handle any notification that arrives in the mean time. */
6835 ch
= readchar (remote_timeout
);
6843 case SERIAL_TIMEOUT
:
6846 if (started_error_output
)
6848 putchar_unfiltered ('\n');
6849 started_error_output
= 0;
6858 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
6862 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
6864 case SERIAL_TIMEOUT
:
6868 break; /* Retransmit buffer. */
6872 fprintf_unfiltered (gdb_stdlog
,
6873 "Packet instead of Ack, ignoring it\n");
6874 /* It's probably an old response sent because an ACK
6875 was lost. Gobble up the packet and ack it so it
6876 doesn't get retransmitted when we resend this
6879 serial_write (remote_desc
, "+", 1);
6880 continue; /* Now, go look for +. */
6887 /* If we got a notification, handle it, and go back to looking
6889 /* We've found the start of a notification. Now
6890 collect the data. */
6891 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
6896 struct cleanup
*old_chain
;
6899 str
= escape_buffer (rs
->buf
, val
);
6900 old_chain
= make_cleanup (xfree
, str
);
6901 fprintf_unfiltered (gdb_stdlog
,
6902 " Notification received: %s\n",
6904 do_cleanups (old_chain
);
6906 handle_notification (rs
->buf
, val
);
6907 /* We're in sync now, rewait for the ack. */
6914 if (!started_error_output
)
6916 started_error_output
= 1;
6917 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6919 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6920 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
6929 if (!started_error_output
)
6931 started_error_output
= 1;
6932 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6934 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6938 break; /* Here to retransmit. */
6942 /* This is wrong. If doing a long backtrace, the user should be
6943 able to get out next time we call QUIT, without anything as
6944 violent as interrupt_query. If we want to provide a way out of
6945 here without getting to the next QUIT, it should be based on
6946 hitting ^C twice as in remote_wait. */
6957 /* Come here after finding the start of a frame when we expected an
6958 ack. Do our best to discard the rest of this packet. */
6967 c
= readchar (remote_timeout
);
6970 case SERIAL_TIMEOUT
:
6971 /* Nothing we can do. */
6974 /* Discard the two bytes of checksum and stop. */
6975 c
= readchar (remote_timeout
);
6977 c
= readchar (remote_timeout
);
6980 case '*': /* Run length encoding. */
6981 /* Discard the repeat count. */
6982 c
= readchar (remote_timeout
);
6987 /* A regular character. */
6993 /* Come here after finding the start of the frame. Collect the rest
6994 into *BUF, verifying the checksum, length, and handling run-length
6995 compression. NUL terminate the buffer. If there is not enough room,
6996 expand *BUF using xrealloc.
6998 Returns -1 on error, number of characters in buffer (ignoring the
6999 trailing NULL) on success. (could be extended to return one of the
7000 SERIAL status indications). */
7003 read_frame (char **buf_p
,
7010 struct remote_state
*rs
= get_remote_state ();
7017 c
= readchar (remote_timeout
);
7020 case SERIAL_TIMEOUT
:
7022 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
7026 fputs_filtered ("Saw new packet start in middle of old one\n",
7028 return -1; /* Start a new packet, count retries. */
7031 unsigned char pktcsum
;
7037 check_0
= readchar (remote_timeout
);
7039 check_1
= readchar (remote_timeout
);
7041 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
7044 fputs_filtered ("Timeout in checksum, retrying\n",
7048 else if (check_0
< 0 || check_1
< 0)
7051 fputs_filtered ("Communication error in checksum\n",
7056 /* Don't recompute the checksum; with no ack packets we
7057 don't have any way to indicate a packet retransmission
7062 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
7063 if (csum
== pktcsum
)
7068 struct cleanup
*old_chain
;
7071 str
= escape_buffer (buf
, bc
);
7072 old_chain
= make_cleanup (xfree
, str
);
7073 fprintf_unfiltered (gdb_stdlog
,
7074 "Bad checksum, sentsum=0x%x, "
7075 "csum=0x%x, buf=%s\n",
7076 pktcsum
, csum
, str
);
7077 do_cleanups (old_chain
);
7079 /* Number of characters in buffer ignoring trailing
7083 case '*': /* Run length encoding. */
7088 c
= readchar (remote_timeout
);
7090 repeat
= c
- ' ' + 3; /* Compute repeat count. */
7092 /* The character before ``*'' is repeated. */
7094 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
7096 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
7098 /* Make some more room in the buffer. */
7099 *sizeof_buf
+= repeat
;
7100 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
7104 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
7110 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
7114 if (bc
>= *sizeof_buf
- 1)
7116 /* Make some more room in the buffer. */
7118 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
7129 /* Read a packet from the remote machine, with error checking, and
7130 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
7131 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
7132 rather than timing out; this is used (in synchronous mode) to wait
7133 for a target that is is executing user code to stop. */
7134 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
7135 don't have to change all the calls to getpkt to deal with the
7136 return value, because at the moment I don't know what the right
7137 thing to do it for those. */
7145 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
7149 /* Read a packet from the remote machine, with error checking, and
7150 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
7151 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
7152 rather than timing out; this is used (in synchronous mode) to wait
7153 for a target that is is executing user code to stop. If FOREVER ==
7154 0, this function is allowed to time out gracefully and return an
7155 indication of this to the caller. Otherwise return the number of
7156 bytes read. If EXPECTING_NOTIF, consider receiving a notification
7157 enough reason to return to the caller. */
7160 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
7161 int expecting_notif
)
7163 struct remote_state
*rs
= get_remote_state ();
7169 /* We're reading a new response. Make sure we don't look at a
7170 previously cached response. */
7171 rs
->cached_wait_status
= 0;
7173 strcpy (*buf
, "timeout");
7176 timeout
= watchdog
> 0 ? watchdog
: -1;
7177 else if (expecting_notif
)
7178 timeout
= 0; /* There should already be a char in the buffer. If
7181 timeout
= remote_timeout
;
7185 /* Process any number of notifications, and then return when
7189 /* If we get a timeout or bad checksm, retry up to MAX_TRIES
7191 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
7193 /* This can loop forever if the remote side sends us
7194 characters continuously, but if it pauses, we'll get
7195 SERIAL_TIMEOUT from readchar because of timeout. Then
7196 we'll count that as a retry.
7198 Note that even when forever is set, we will only wait
7199 forever prior to the start of a packet. After that, we
7200 expect characters to arrive at a brisk pace. They should
7201 show up within remote_timeout intervals. */
7203 c
= readchar (timeout
);
7204 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
7206 if (c
== SERIAL_TIMEOUT
)
7208 if (expecting_notif
)
7209 return -1; /* Don't complain, it's normal to not get
7210 anything in this case. */
7212 if (forever
) /* Watchdog went off? Kill the target. */
7216 error (_("Watchdog timeout has expired. Target detached."));
7219 fputs_filtered ("Timed out.\n", gdb_stdlog
);
7223 /* We've found the start of a packet or notification.
7224 Now collect the data. */
7225 val
= read_frame (buf
, sizeof_buf
);
7230 serial_write (remote_desc
, "-", 1);
7233 if (tries
> MAX_TRIES
)
7235 /* We have tried hard enough, and just can't receive the
7236 packet/notification. Give up. */
7237 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
7239 /* Skip the ack char if we're in no-ack mode. */
7240 if (!rs
->noack_mode
)
7241 serial_write (remote_desc
, "+", 1);
7245 /* If we got an ordinary packet, return that to our caller. */
7250 struct cleanup
*old_chain
;
7253 str
= escape_buffer (*buf
, val
);
7254 old_chain
= make_cleanup (xfree
, str
);
7255 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s\n", str
);
7256 do_cleanups (old_chain
);
7259 /* Skip the ack char if we're in no-ack mode. */
7260 if (!rs
->noack_mode
)
7261 serial_write (remote_desc
, "+", 1);
7265 /* If we got a notification, handle it, and go back to looking
7269 gdb_assert (c
== '%');
7273 struct cleanup
*old_chain
;
7276 str
= escape_buffer (*buf
, val
);
7277 old_chain
= make_cleanup (xfree
, str
);
7278 fprintf_unfiltered (gdb_stdlog
,
7279 " Notification received: %s\n",
7281 do_cleanups (old_chain
);
7284 handle_notification (*buf
, val
);
7286 /* Notifications require no acknowledgement. */
7288 if (expecting_notif
)
7295 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
7297 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0);
7301 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
)
7303 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1);
7308 remote_kill (struct target_ops
*ops
)
7310 /* Use catch_errors so the user can quit from gdb even when we
7311 aren't on speaking terms with the remote system. */
7312 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
7314 /* Don't wait for it to die. I'm not really sure it matters whether
7315 we do or not. For the existing stubs, kill is a noop. */
7316 target_mourn_inferior ();
7320 remote_vkill (int pid
, struct remote_state
*rs
)
7322 if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
7325 /* Tell the remote target to detach. */
7326 sprintf (rs
->buf
, "vKill;%x", pid
);
7328 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7330 if (packet_ok (rs
->buf
,
7331 &remote_protocol_packets
[PACKET_vKill
]) == PACKET_OK
)
7333 else if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
7340 extended_remote_kill (struct target_ops
*ops
)
7343 int pid
= ptid_get_pid (inferior_ptid
);
7344 struct remote_state
*rs
= get_remote_state ();
7346 res
= remote_vkill (pid
, rs
);
7347 if (res
== -1 && !remote_multi_process_p (rs
))
7349 /* Don't try 'k' on a multi-process aware stub -- it has no way
7350 to specify the pid. */
7354 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7355 if (rs
->buf
[0] != 'O' || rs
->buf
[0] != 'K')
7358 /* Don't wait for it to die. I'm not really sure it matters whether
7359 we do or not. For the existing stubs, kill is a noop. */
7365 error (_("Can't kill process"));
7367 target_mourn_inferior ();
7371 remote_mourn (struct target_ops
*ops
)
7373 remote_mourn_1 (ops
);
7376 /* Worker function for remote_mourn. */
7378 remote_mourn_1 (struct target_ops
*target
)
7380 unpush_target (target
);
7382 /* remote_close takes care of doing most of the clean up. */
7383 generic_mourn_inferior ();
7387 extended_remote_mourn_1 (struct target_ops
*target
)
7389 struct remote_state
*rs
= get_remote_state ();
7391 /* In case we got here due to an error, but we're going to stay
7393 rs
->waiting_for_stop_reply
= 0;
7395 /* We're no longer interested in these events. */
7396 discard_pending_stop_replies (ptid_get_pid (inferior_ptid
));
7398 /* If the current general thread belonged to the process we just
7399 detached from or has exited, the remote side current general
7400 thread becomes undefined. Considering a case like this:
7402 - We just got here due to a detach.
7403 - The process that we're detaching from happens to immediately
7404 report a global breakpoint being hit in non-stop mode, in the
7405 same thread we had selected before.
7406 - GDB attaches to this process again.
7407 - This event happens to be the next event we handle.
7409 GDB would consider that the current general thread didn't need to
7410 be set on the stub side (with Hg), since for all it knew,
7411 GENERAL_THREAD hadn't changed.
7413 Notice that although in all-stop mode, the remote server always
7414 sets the current thread to the thread reporting the stop event,
7415 that doesn't happen in non-stop mode; in non-stop, the stub *must
7416 not* change the current thread when reporting a breakpoint hit,
7417 due to the decoupling of event reporting and event handling.
7419 To keep things simple, we always invalidate our notion of the
7421 record_currthread (minus_one_ptid
);
7423 /* Unlike "target remote", we do not want to unpush the target; then
7424 the next time the user says "run", we won't be connected. */
7426 /* Call common code to mark the inferior as not running. */
7427 generic_mourn_inferior ();
7429 if (!have_inferiors ())
7431 if (!remote_multi_process_p (rs
))
7433 /* Check whether the target is running now - some remote stubs
7434 automatically restart after kill. */
7436 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7438 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
7440 /* Assume that the target has been restarted. Set
7441 inferior_ptid so that bits of core GDB realizes
7442 there's something here, e.g., so that the user can
7443 say "kill" again. */
7444 inferior_ptid
= magic_null_ptid
;
7451 extended_remote_mourn (struct target_ops
*ops
)
7453 extended_remote_mourn_1 (ops
);
7457 extended_remote_run (char *args
)
7459 struct remote_state
*rs
= get_remote_state ();
7462 /* If the user has disabled vRun support, or we have detected that
7463 support is not available, do not try it. */
7464 if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
7467 strcpy (rs
->buf
, "vRun;");
7468 len
= strlen (rs
->buf
);
7470 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
7471 error (_("Remote file name too long for run packet"));
7472 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
, 0);
7474 gdb_assert (args
!= NULL
);
7477 struct cleanup
*back_to
;
7481 argv
= gdb_buildargv (args
);
7482 back_to
= make_cleanup ((void (*) (void *)) freeargv
, argv
);
7483 for (i
= 0; argv
[i
] != NULL
; i
++)
7485 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
7486 error (_("Argument list too long for run packet"));
7487 rs
->buf
[len
++] = ';';
7488 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
, 0);
7490 do_cleanups (back_to
);
7493 rs
->buf
[len
++] = '\0';
7496 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7498 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]) == PACKET_OK
)
7500 /* We have a wait response; we don't need it, though. All is well. */
7503 else if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
7504 /* It wasn't disabled before, but it is now. */
7508 if (remote_exec_file
[0] == '\0')
7509 error (_("Running the default executable on the remote target failed; "
7510 "try \"set remote exec-file\"?"));
7512 error (_("Running \"%s\" on the remote target failed"),
7517 /* In the extended protocol we want to be able to do things like
7518 "run" and have them basically work as expected. So we need
7519 a special create_inferior function. We support changing the
7520 executable file and the command line arguments, but not the
7524 extended_remote_create_inferior_1 (char *exec_file
, char *args
,
7525 char **env
, int from_tty
)
7527 /* If running asynchronously, register the target file descriptor
7528 with the event loop. */
7529 if (target_can_async_p ())
7530 target_async (inferior_event_handler
, 0);
7532 /* Now restart the remote server. */
7533 if (extended_remote_run (args
) == -1)
7535 /* vRun was not supported. Fail if we need it to do what the
7537 if (remote_exec_file
[0])
7538 error (_("Remote target does not support \"set remote exec-file\""));
7540 error (_("Remote target does not support \"set args\" or run <ARGS>"));
7542 /* Fall back to "R". */
7543 extended_remote_restart ();
7546 if (!have_inferiors ())
7548 /* Clean up from the last time we ran, before we mark the target
7549 running again. This will mark breakpoints uninserted, and
7550 get_offsets may insert breakpoints. */
7551 init_thread_list ();
7552 init_wait_for_inferior ();
7555 /* Now mark the inferior as running before we do anything else. */
7556 inferior_ptid
= magic_null_ptid
;
7558 /* Now, if we have thread information, update inferior_ptid. */
7559 inferior_ptid
= remote_current_thread (inferior_ptid
);
7561 remote_add_inferior (ptid_get_pid (inferior_ptid
), 0);
7562 add_thread_silent (inferior_ptid
);
7564 /* Get updated offsets, if the stub uses qOffsets. */
7569 extended_remote_create_inferior (struct target_ops
*ops
,
7570 char *exec_file
, char *args
,
7571 char **env
, int from_tty
)
7573 extended_remote_create_inferior_1 (exec_file
, args
, env
, from_tty
);
7577 /* Insert a breakpoint. On targets that have software breakpoint
7578 support, we ask the remote target to do the work; on targets
7579 which don't, we insert a traditional memory breakpoint. */
7582 remote_insert_breakpoint (struct gdbarch
*gdbarch
,
7583 struct bp_target_info
*bp_tgt
)
7585 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
7586 If it succeeds, then set the support to PACKET_ENABLE. If it
7587 fails, and the user has explicitly requested the Z support then
7588 report an error, otherwise, mark it disabled and go on. */
7590 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
7592 CORE_ADDR addr
= bp_tgt
->placed_address
;
7593 struct remote_state
*rs
;
7597 gdbarch_remote_breakpoint_from_pc (gdbarch
, &addr
, &bpsize
);
7599 rs
= get_remote_state ();
7605 addr
= (ULONGEST
) remote_address_masked (addr
);
7606 p
+= hexnumstr (p
, addr
);
7607 sprintf (p
, ",%d", bpsize
);
7610 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7612 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
7617 bp_tgt
->placed_address
= addr
;
7618 bp_tgt
->placed_size
= bpsize
;
7620 case PACKET_UNKNOWN
:
7625 return memory_insert_breakpoint (gdbarch
, bp_tgt
);
7629 remote_remove_breakpoint (struct gdbarch
*gdbarch
,
7630 struct bp_target_info
*bp_tgt
)
7632 CORE_ADDR addr
= bp_tgt
->placed_address
;
7633 struct remote_state
*rs
= get_remote_state ();
7635 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
7643 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
7644 p
+= hexnumstr (p
, addr
);
7645 sprintf (p
, ",%d", bp_tgt
->placed_size
);
7648 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7650 return (rs
->buf
[0] == 'E');
7653 return memory_remove_breakpoint (gdbarch
, bp_tgt
);
7657 watchpoint_to_Z_packet (int type
)
7662 return Z_PACKET_WRITE_WP
;
7665 return Z_PACKET_READ_WP
;
7668 return Z_PACKET_ACCESS_WP
;
7671 internal_error (__FILE__
, __LINE__
,
7672 _("hw_bp_to_z: bad watchpoint type %d"), type
);
7677 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
,
7678 struct expression
*cond
)
7680 struct remote_state
*rs
= get_remote_state ();
7682 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
7684 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
7687 sprintf (rs
->buf
, "Z%x,", packet
);
7688 p
= strchr (rs
->buf
, '\0');
7689 addr
= remote_address_masked (addr
);
7690 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7691 sprintf (p
, ",%x", len
);
7694 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7696 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
7700 case PACKET_UNKNOWN
:
7705 internal_error (__FILE__
, __LINE__
,
7706 _("remote_insert_watchpoint: reached end of function"));
7711 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
,
7712 struct expression
*cond
)
7714 struct remote_state
*rs
= get_remote_state ();
7716 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
7718 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
7721 sprintf (rs
->buf
, "z%x,", packet
);
7722 p
= strchr (rs
->buf
, '\0');
7723 addr
= remote_address_masked (addr
);
7724 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7725 sprintf (p
, ",%x", len
);
7727 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7729 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
7732 case PACKET_UNKNOWN
:
7737 internal_error (__FILE__
, __LINE__
,
7738 _("remote_remove_watchpoint: reached end of function"));
7742 int remote_hw_watchpoint_limit
= -1;
7743 int remote_hw_breakpoint_limit
= -1;
7746 remote_check_watch_resources (int type
, int cnt
, int ot
)
7748 if (type
== bp_hardware_breakpoint
)
7750 if (remote_hw_breakpoint_limit
== 0)
7752 else if (remote_hw_breakpoint_limit
< 0)
7754 else if (cnt
<= remote_hw_breakpoint_limit
)
7759 if (remote_hw_watchpoint_limit
== 0)
7761 else if (remote_hw_watchpoint_limit
< 0)
7765 else if (cnt
<= remote_hw_watchpoint_limit
)
7772 remote_stopped_by_watchpoint (void)
7774 return remote_stopped_by_watchpoint_p
;
7778 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
7782 if (remote_stopped_by_watchpoint ())
7784 *addr_p
= remote_watch_data_address
;
7793 remote_insert_hw_breakpoint (struct gdbarch
*gdbarch
,
7794 struct bp_target_info
*bp_tgt
)
7797 struct remote_state
*rs
;
7800 /* The length field should be set to the size of a breakpoint
7801 instruction, even though we aren't inserting one ourselves. */
7803 gdbarch_remote_breakpoint_from_pc
7804 (gdbarch
, &bp_tgt
->placed_address
, &bp_tgt
->placed_size
);
7806 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7809 rs
= get_remote_state ();
7816 addr
= remote_address_masked (bp_tgt
->placed_address
);
7817 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7818 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7821 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7823 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7826 case PACKET_UNKNOWN
:
7831 internal_error (__FILE__
, __LINE__
,
7832 _("remote_insert_hw_breakpoint: reached end of function"));
7837 remote_remove_hw_breakpoint (struct gdbarch
*gdbarch
,
7838 struct bp_target_info
*bp_tgt
)
7841 struct remote_state
*rs
= get_remote_state ();
7844 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7851 addr
= remote_address_masked (bp_tgt
->placed_address
);
7852 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7853 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7856 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7858 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7861 case PACKET_UNKNOWN
:
7866 internal_error (__FILE__
, __LINE__
,
7867 _("remote_remove_hw_breakpoint: reached end of function"));
7870 /* Table used by the crc32 function to calcuate the checksum. */
7872 static unsigned long crc32_table
[256] =
7875 static unsigned long
7876 crc32 (const unsigned char *buf
, int len
, unsigned int crc
)
7878 if (!crc32_table
[1])
7880 /* Initialize the CRC table and the decoding table. */
7884 for (i
= 0; i
< 256; i
++)
7886 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
7887 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
7894 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
7900 /* Verify memory using the "qCRC:" request. */
7903 remote_verify_memory (struct target_ops
*ops
,
7904 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
7906 struct remote_state
*rs
= get_remote_state ();
7907 unsigned long host_crc
, target_crc
;
7910 /* FIXME: assumes lma can fit into long. */
7911 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
7912 (long) lma
, (long) size
);
7915 /* Be clever; compute the host_crc before waiting for target
7917 host_crc
= crc32 (data
, size
, 0xffffffff);
7919 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7920 if (rs
->buf
[0] == 'E')
7923 if (rs
->buf
[0] != 'C')
7924 error (_("remote target does not support this operation"));
7926 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
7927 target_crc
= target_crc
* 16 + fromhex (*tmp
);
7929 return (host_crc
== target_crc
);
7932 /* compare-sections command
7934 With no arguments, compares each loadable section in the exec bfd
7935 with the same memory range on the target, and reports mismatches.
7936 Useful for verifying the image on the target against the exec file. */
7939 compare_sections_command (char *args
, int from_tty
)
7942 struct cleanup
*old_chain
;
7944 const char *sectname
;
7952 error (_("command cannot be used without an exec file"));
7954 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
7956 if (!(s
->flags
& SEC_LOAD
))
7957 continue; /* Skip non-loadable section. */
7959 size
= bfd_get_section_size (s
);
7961 continue; /* Skip zero-length section. */
7963 sectname
= bfd_get_section_name (exec_bfd
, s
);
7964 if (args
&& strcmp (args
, sectname
) != 0)
7965 continue; /* Not the section selected by user. */
7967 matched
= 1; /* Do this section. */
7970 sectdata
= xmalloc (size
);
7971 old_chain
= make_cleanup (xfree
, sectdata
);
7972 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
7974 res
= target_verify_memory (sectdata
, lma
, size
);
7977 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
7978 paddress (target_gdbarch
, lma
),
7979 paddress (target_gdbarch
, lma
+ size
));
7981 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
7982 paddress (target_gdbarch
, lma
),
7983 paddress (target_gdbarch
, lma
+ size
));
7985 printf_filtered ("matched.\n");
7988 printf_filtered ("MIS-MATCHED!\n");
7992 do_cleanups (old_chain
);
7995 warning (_("One or more sections of the remote executable does not match\n\
7996 the loaded file\n"));
7997 if (args
&& !matched
)
7998 printf_filtered (_("No loaded section named '%s'.\n"), args
);
8001 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
8002 into remote target. The number of bytes written to the remote
8003 target is returned, or -1 for error. */
8006 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
8007 const char *annex
, const gdb_byte
*writebuf
,
8008 ULONGEST offset
, LONGEST len
,
8009 struct packet_config
*packet
)
8013 struct remote_state
*rs
= get_remote_state ();
8014 int max_size
= get_memory_write_packet_size ();
8016 if (packet
->support
== PACKET_DISABLE
)
8019 /* Insert header. */
8020 i
= snprintf (rs
->buf
, max_size
,
8021 "qXfer:%s:write:%s:%s:",
8022 object_name
, annex
? annex
: "",
8023 phex_nz (offset
, sizeof offset
));
8024 max_size
-= (i
+ 1);
8026 /* Escape as much data as fits into rs->buf. */
8027 buf_len
= remote_escape_output
8028 (writebuf
, len
, (rs
->buf
+ i
), &max_size
, max_size
);
8030 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
8031 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
8032 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
8035 unpack_varlen_hex (rs
->buf
, &n
);
8039 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
8040 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
8041 number of bytes read is returned, or 0 for EOF, or -1 for error.
8042 The number of bytes read may be less than LEN without indicating an
8043 EOF. PACKET is checked and updated to indicate whether the remote
8044 target supports this object. */
8047 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
8049 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
8050 struct packet_config
*packet
)
8052 static char *finished_object
;
8053 static char *finished_annex
;
8054 static ULONGEST finished_offset
;
8056 struct remote_state
*rs
= get_remote_state ();
8057 LONGEST i
, n
, packet_len
;
8059 if (packet
->support
== PACKET_DISABLE
)
8062 /* Check whether we've cached an end-of-object packet that matches
8064 if (finished_object
)
8066 if (strcmp (object_name
, finished_object
) == 0
8067 && strcmp (annex
? annex
: "", finished_annex
) == 0
8068 && offset
== finished_offset
)
8071 /* Otherwise, we're now reading something different. Discard
8073 xfree (finished_object
);
8074 xfree (finished_annex
);
8075 finished_object
= NULL
;
8076 finished_annex
= NULL
;
8079 /* Request only enough to fit in a single packet. The actual data
8080 may not, since we don't know how much of it will need to be escaped;
8081 the target is free to respond with slightly less data. We subtract
8082 five to account for the response type and the protocol frame. */
8083 n
= min (get_remote_packet_size () - 5, len
);
8084 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
8085 object_name
, annex
? annex
: "",
8086 phex_nz (offset
, sizeof offset
),
8087 phex_nz (n
, sizeof n
));
8088 i
= putpkt (rs
->buf
);
8093 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
8094 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
8097 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
8098 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
8100 /* 'm' means there is (or at least might be) more data after this
8101 batch. That does not make sense unless there's at least one byte
8102 of data in this reply. */
8103 if (rs
->buf
[0] == 'm' && packet_len
== 1)
8104 error (_("Remote qXfer reply contained no data."));
8106 /* Got some data. */
8107 i
= remote_unescape_input (rs
->buf
+ 1, packet_len
- 1, readbuf
, n
);
8109 /* 'l' is an EOF marker, possibly including a final block of data,
8110 or possibly empty. If we have the final block of a non-empty
8111 object, record this fact to bypass a subsequent partial read. */
8112 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
8114 finished_object
= xstrdup (object_name
);
8115 finished_annex
= xstrdup (annex
? annex
: "");
8116 finished_offset
= offset
+ i
;
8123 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
8124 const char *annex
, gdb_byte
*readbuf
,
8125 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
8127 struct remote_state
*rs
;
8132 set_remote_traceframe ();
8133 set_general_thread (inferior_ptid
);
8135 rs
= get_remote_state ();
8137 /* Handle memory using the standard memory routines. */
8138 if (object
== TARGET_OBJECT_MEMORY
)
8144 /* If the remote target is connected but not running, we should
8145 pass this request down to a lower stratum (e.g. the executable
8147 if (!target_has_execution
)
8150 if (writebuf
!= NULL
)
8151 xfered
= remote_write_bytes (offset
, writebuf
, len
);
8153 xfered
= remote_read_bytes (offset
, readbuf
, len
);
8157 else if (xfered
== 0 && errno
== 0)
8163 /* Handle SPU memory using qxfer packets. */
8164 if (object
== TARGET_OBJECT_SPU
)
8167 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
8168 &remote_protocol_packets
8169 [PACKET_qXfer_spu_read
]);
8171 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
8172 &remote_protocol_packets
8173 [PACKET_qXfer_spu_write
]);
8176 /* Handle extra signal info using qxfer packets. */
8177 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
8180 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
8181 &remote_protocol_packets
8182 [PACKET_qXfer_siginfo_read
]);
8184 return remote_write_qxfer (ops
, "siginfo", annex
,
8185 writebuf
, offset
, len
,
8186 &remote_protocol_packets
8187 [PACKET_qXfer_siginfo_write
]);
8190 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
8193 return remote_read_qxfer (ops
, "statictrace", annex
,
8194 readbuf
, offset
, len
,
8195 &remote_protocol_packets
8196 [PACKET_qXfer_statictrace_read
]);
8201 /* Only handle flash writes. */
8202 if (writebuf
!= NULL
)
8208 case TARGET_OBJECT_FLASH
:
8209 xfered
= remote_flash_write (ops
, offset
, len
, writebuf
);
8213 else if (xfered
== 0 && errno
== 0)
8223 /* Map pre-existing objects onto letters. DO NOT do this for new
8224 objects!!! Instead specify new query packets. */
8227 case TARGET_OBJECT_AVR
:
8231 case TARGET_OBJECT_AUXV
:
8232 gdb_assert (annex
== NULL
);
8233 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
8234 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
8236 case TARGET_OBJECT_AVAILABLE_FEATURES
:
8237 return remote_read_qxfer
8238 (ops
, "features", annex
, readbuf
, offset
, len
,
8239 &remote_protocol_packets
[PACKET_qXfer_features
]);
8241 case TARGET_OBJECT_LIBRARIES
:
8242 return remote_read_qxfer
8243 (ops
, "libraries", annex
, readbuf
, offset
, len
,
8244 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
8246 case TARGET_OBJECT_MEMORY_MAP
:
8247 gdb_assert (annex
== NULL
);
8248 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
8249 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
8251 case TARGET_OBJECT_OSDATA
:
8252 /* Should only get here if we're connected. */
8253 gdb_assert (remote_desc
);
8254 return remote_read_qxfer
8255 (ops
, "osdata", annex
, readbuf
, offset
, len
,
8256 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
8258 case TARGET_OBJECT_THREADS
:
8259 gdb_assert (annex
== NULL
);
8260 return remote_read_qxfer (ops
, "threads", annex
, readbuf
, offset
, len
,
8261 &remote_protocol_packets
[PACKET_qXfer_threads
]);
8263 case TARGET_OBJECT_TRACEFRAME_INFO
:
8264 gdb_assert (annex
== NULL
);
8265 return remote_read_qxfer
8266 (ops
, "traceframe-info", annex
, readbuf
, offset
, len
,
8267 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
8272 /* Note: a zero OFFSET and LEN can be used to query the minimum
8274 if (offset
== 0 && len
== 0)
8275 return (get_remote_packet_size ());
8276 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
8277 large enough let the caller deal with it. */
8278 if (len
< get_remote_packet_size ())
8280 len
= get_remote_packet_size ();
8282 /* Except for querying the minimum buffer size, target must be open. */
8284 error (_("remote query is only available after target open"));
8286 gdb_assert (annex
!= NULL
);
8287 gdb_assert (readbuf
!= NULL
);
8293 /* We used one buffer char for the remote protocol q command and
8294 another for the query type. As the remote protocol encapsulation
8295 uses 4 chars plus one extra in case we are debugging
8296 (remote_debug), we have PBUFZIZ - 7 left to pack the query
8299 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
8301 /* Bad caller may have sent forbidden characters. */
8302 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
8307 gdb_assert (annex
[i
] == '\0');
8309 i
= putpkt (rs
->buf
);
8313 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8314 strcpy ((char *) readbuf
, rs
->buf
);
8316 return strlen ((char *) readbuf
);
8320 remote_search_memory (struct target_ops
* ops
,
8321 CORE_ADDR start_addr
, ULONGEST search_space_len
,
8322 const gdb_byte
*pattern
, ULONGEST pattern_len
,
8323 CORE_ADDR
*found_addrp
)
8325 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
8326 struct remote_state
*rs
= get_remote_state ();
8327 int max_size
= get_memory_write_packet_size ();
8328 struct packet_config
*packet
=
8329 &remote_protocol_packets
[PACKET_qSearch_memory
];
8330 /* Number of packet bytes used to encode the pattern;
8331 this could be more than PATTERN_LEN due to escape characters. */
8332 int escaped_pattern_len
;
8333 /* Amount of pattern that was encodable in the packet. */
8334 int used_pattern_len
;
8337 ULONGEST found_addr
;
8339 /* Don't go to the target if we don't have to.
8340 This is done before checking packet->support to avoid the possibility that
8341 a success for this edge case means the facility works in general. */
8342 if (pattern_len
> search_space_len
)
8344 if (pattern_len
== 0)
8346 *found_addrp
= start_addr
;
8350 /* If we already know the packet isn't supported, fall back to the simple
8351 way of searching memory. */
8353 if (packet
->support
== PACKET_DISABLE
)
8355 /* Target doesn't provided special support, fall back and use the
8356 standard support (copy memory and do the search here). */
8357 return simple_search_memory (ops
, start_addr
, search_space_len
,
8358 pattern
, pattern_len
, found_addrp
);
8361 /* Insert header. */
8362 i
= snprintf (rs
->buf
, max_size
,
8363 "qSearch:memory:%s;%s;",
8364 phex_nz (start_addr
, addr_size
),
8365 phex_nz (search_space_len
, sizeof (search_space_len
)));
8366 max_size
-= (i
+ 1);
8368 /* Escape as much data as fits into rs->buf. */
8369 escaped_pattern_len
=
8370 remote_escape_output (pattern
, pattern_len
, (rs
->buf
+ i
),
8371 &used_pattern_len
, max_size
);
8373 /* Bail if the pattern is too large. */
8374 if (used_pattern_len
!= pattern_len
)
8375 error (_("Pattern is too large to transmit to remote target."));
8377 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
8378 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
8379 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
8381 /* The request may not have worked because the command is not
8382 supported. If so, fall back to the simple way. */
8383 if (packet
->support
== PACKET_DISABLE
)
8385 return simple_search_memory (ops
, start_addr
, search_space_len
,
8386 pattern
, pattern_len
, found_addrp
);
8391 if (rs
->buf
[0] == '0')
8393 else if (rs
->buf
[0] == '1')
8396 if (rs
->buf
[1] != ',')
8397 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
8398 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
8399 *found_addrp
= found_addr
;
8402 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
8408 remote_rcmd (char *command
,
8409 struct ui_file
*outbuf
)
8411 struct remote_state
*rs
= get_remote_state ();
8415 error (_("remote rcmd is only available after target open"));
8417 /* Send a NULL command across as an empty command. */
8418 if (command
== NULL
)
8421 /* The query prefix. */
8422 strcpy (rs
->buf
, "qRcmd,");
8423 p
= strchr (rs
->buf
, '\0');
8425 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/)
8426 > get_remote_packet_size ())
8427 error (_("\"monitor\" command ``%s'' is too long."), command
);
8429 /* Encode the actual command. */
8430 bin2hex ((gdb_byte
*) command
, p
, 0);
8432 if (putpkt (rs
->buf
) < 0)
8433 error (_("Communication problem with target."));
8435 /* get/display the response */
8440 /* XXX - see also remote_get_noisy_reply(). */
8442 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8445 error (_("Target does not support this command."));
8446 if (buf
[0] == 'O' && buf
[1] != 'K')
8448 remote_console_output (buf
+ 1); /* 'O' message from stub. */
8451 if (strcmp (buf
, "OK") == 0)
8453 if (strlen (buf
) == 3 && buf
[0] == 'E'
8454 && isdigit (buf
[1]) && isdigit (buf
[2]))
8456 error (_("Protocol error with Rcmd"));
8458 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
8460 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
8462 fputc_unfiltered (c
, outbuf
);
8468 static VEC(mem_region_s
) *
8469 remote_memory_map (struct target_ops
*ops
)
8471 VEC(mem_region_s
) *result
= NULL
;
8472 char *text
= target_read_stralloc (¤t_target
,
8473 TARGET_OBJECT_MEMORY_MAP
, NULL
);
8477 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
8479 result
= parse_memory_map (text
);
8480 do_cleanups (back_to
);
8487 packet_command (char *args
, int from_tty
)
8489 struct remote_state
*rs
= get_remote_state ();
8492 error (_("command can only be used with remote target"));
8495 error (_("remote-packet command requires packet text as argument"));
8497 puts_filtered ("sending: ");
8498 print_packet (args
);
8499 puts_filtered ("\n");
8502 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8503 puts_filtered ("received: ");
8504 print_packet (rs
->buf
);
8505 puts_filtered ("\n");
8509 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
8511 static void display_thread_info (struct gdb_ext_thread_info
*info
);
8513 static void threadset_test_cmd (char *cmd
, int tty
);
8515 static void threadalive_test (char *cmd
, int tty
);
8517 static void threadlist_test_cmd (char *cmd
, int tty
);
8519 int get_and_display_threadinfo (threadref
*ref
);
8521 static void threadinfo_test_cmd (char *cmd
, int tty
);
8523 static int thread_display_step (threadref
*ref
, void *context
);
8525 static void threadlist_update_test_cmd (char *cmd
, int tty
);
8527 static void init_remote_threadtests (void);
8529 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
8532 threadset_test_cmd (char *cmd
, int tty
)
8534 int sample_thread
= SAMPLE_THREAD
;
8536 printf_filtered (_("Remote threadset test\n"));
8537 set_general_thread (sample_thread
);
8542 threadalive_test (char *cmd
, int tty
)
8544 int sample_thread
= SAMPLE_THREAD
;
8545 int pid
= ptid_get_pid (inferior_ptid
);
8546 ptid_t ptid
= ptid_build (pid
, 0, sample_thread
);
8548 if (remote_thread_alive (ptid
))
8549 printf_filtered ("PASS: Thread alive test\n");
8551 printf_filtered ("FAIL: Thread alive test\n");
8554 void output_threadid (char *title
, threadref
*ref
);
8557 output_threadid (char *title
, threadref
*ref
)
8561 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
8563 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
8567 threadlist_test_cmd (char *cmd
, int tty
)
8570 threadref nextthread
;
8571 int done
, result_count
;
8572 threadref threadlist
[3];
8574 printf_filtered ("Remote Threadlist test\n");
8575 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
8576 &result_count
, &threadlist
[0]))
8577 printf_filtered ("FAIL: threadlist test\n");
8580 threadref
*scan
= threadlist
;
8581 threadref
*limit
= scan
+ result_count
;
8583 while (scan
< limit
)
8584 output_threadid (" thread ", scan
++);
8589 display_thread_info (struct gdb_ext_thread_info
*info
)
8591 output_threadid ("Threadid: ", &info
->threadid
);
8592 printf_filtered ("Name: %s\n ", info
->shortname
);
8593 printf_filtered ("State: %s\n", info
->display
);
8594 printf_filtered ("other: %s\n\n", info
->more_display
);
8598 get_and_display_threadinfo (threadref
*ref
)
8602 struct gdb_ext_thread_info threadinfo
;
8604 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
8605 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
8606 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
8607 display_thread_info (&threadinfo
);
8612 threadinfo_test_cmd (char *cmd
, int tty
)
8614 int athread
= SAMPLE_THREAD
;
8618 int_to_threadref (&thread
, athread
);
8619 printf_filtered ("Remote Threadinfo test\n");
8620 if (!get_and_display_threadinfo (&thread
))
8621 printf_filtered ("FAIL cannot get thread info\n");
8625 thread_display_step (threadref
*ref
, void *context
)
8627 /* output_threadid(" threadstep ",ref); *//* simple test */
8628 return get_and_display_threadinfo (ref
);
8632 threadlist_update_test_cmd (char *cmd
, int tty
)
8634 printf_filtered ("Remote Threadlist update test\n");
8635 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
8639 init_remote_threadtests (void)
8641 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
8642 _("Fetch and print the remote list of "
8643 "thread identifiers, one pkt only"));
8644 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
8645 _("Fetch and display info about one thread"));
8646 add_com ("tset", class_obscure
, threadset_test_cmd
,
8647 _("Test setting to a different thread"));
8648 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
8649 _("Iterate through updating all remote thread info"));
8650 add_com ("talive", class_obscure
, threadalive_test
,
8651 _(" Remote thread alive test "));
8656 /* Convert a thread ID to a string. Returns the string in a static
8660 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
8662 static char buf
[64];
8663 struct remote_state
*rs
= get_remote_state ();
8665 if (ptid_is_pid (ptid
))
8667 /* Printing an inferior target id. */
8669 /* When multi-process extensions are off, there's no way in the
8670 remote protocol to know the remote process id, if there's any
8671 at all. There's one exception --- when we're connected with
8672 target extended-remote, and we manually attached to a process
8673 with "attach PID". We don't record anywhere a flag that
8674 allows us to distinguish that case from the case of
8675 connecting with extended-remote and the stub already being
8676 attached to a process, and reporting yes to qAttached, hence
8677 no smart special casing here. */
8678 if (!remote_multi_process_p (rs
))
8680 xsnprintf (buf
, sizeof buf
, "Remote target");
8684 return normal_pid_to_str (ptid
);
8688 if (ptid_equal (magic_null_ptid
, ptid
))
8689 xsnprintf (buf
, sizeof buf
, "Thread <main>");
8690 else if (remote_multi_process_p (rs
))
8691 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
8692 ptid_get_pid (ptid
), ptid_get_tid (ptid
));
8694 xsnprintf (buf
, sizeof buf
, "Thread %ld",
8695 ptid_get_tid (ptid
));
8700 /* Get the address of the thread local variable in OBJFILE which is
8701 stored at OFFSET within the thread local storage for thread PTID. */
8704 remote_get_thread_local_address (struct target_ops
*ops
,
8705 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
8707 if (remote_protocol_packets
[PACKET_qGetTLSAddr
].support
!= PACKET_DISABLE
)
8709 struct remote_state
*rs
= get_remote_state ();
8711 char *endp
= rs
->buf
+ get_remote_packet_size ();
8712 enum packet_result result
;
8714 strcpy (p
, "qGetTLSAddr:");
8716 p
= write_ptid (p
, endp
, ptid
);
8718 p
+= hexnumstr (p
, offset
);
8720 p
+= hexnumstr (p
, lm
);
8724 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8725 result
= packet_ok (rs
->buf
,
8726 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
8727 if (result
== PACKET_OK
)
8731 unpack_varlen_hex (rs
->buf
, &result
);
8734 else if (result
== PACKET_UNKNOWN
)
8735 throw_error (TLS_GENERIC_ERROR
,
8736 _("Remote target doesn't support qGetTLSAddr packet"));
8738 throw_error (TLS_GENERIC_ERROR
,
8739 _("Remote target failed to process qGetTLSAddr request"));
8742 throw_error (TLS_GENERIC_ERROR
,
8743 _("TLS not supported or disabled on this target"));
8748 /* Provide thread local base, i.e. Thread Information Block address.
8749 Returns 1 if ptid is found and thread_local_base is non zero. */
8752 remote_get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
8754 if (remote_protocol_packets
[PACKET_qGetTIBAddr
].support
!= PACKET_DISABLE
)
8756 struct remote_state
*rs
= get_remote_state ();
8758 char *endp
= rs
->buf
+ get_remote_packet_size ();
8759 enum packet_result result
;
8761 strcpy (p
, "qGetTIBAddr:");
8763 p
= write_ptid (p
, endp
, ptid
);
8767 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8768 result
= packet_ok (rs
->buf
,
8769 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
8770 if (result
== PACKET_OK
)
8774 unpack_varlen_hex (rs
->buf
, &result
);
8776 *addr
= (CORE_ADDR
) result
;
8779 else if (result
== PACKET_UNKNOWN
)
8780 error (_("Remote target doesn't support qGetTIBAddr packet"));
8782 error (_("Remote target failed to process qGetTIBAddr request"));
8785 error (_("qGetTIBAddr not supported or disabled on this target"));
8790 /* Support for inferring a target description based on the current
8791 architecture and the size of a 'g' packet. While the 'g' packet
8792 can have any size (since optional registers can be left off the
8793 end), some sizes are easily recognizable given knowledge of the
8794 approximate architecture. */
8796 struct remote_g_packet_guess
8799 const struct target_desc
*tdesc
;
8801 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
8802 DEF_VEC_O(remote_g_packet_guess_s
);
8804 struct remote_g_packet_data
8806 VEC(remote_g_packet_guess_s
) *guesses
;
8809 static struct gdbarch_data
*remote_g_packet_data_handle
;
8812 remote_g_packet_data_init (struct obstack
*obstack
)
8814 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
8818 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
8819 const struct target_desc
*tdesc
)
8821 struct remote_g_packet_data
*data
8822 = gdbarch_data (gdbarch
, remote_g_packet_data_handle
);
8823 struct remote_g_packet_guess new_guess
, *guess
;
8826 gdb_assert (tdesc
!= NULL
);
8829 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
8831 if (guess
->bytes
== bytes
)
8832 internal_error (__FILE__
, __LINE__
,
8833 _("Duplicate g packet description added for size %d"),
8836 new_guess
.bytes
= bytes
;
8837 new_guess
.tdesc
= tdesc
;
8838 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
8841 /* Return 1 if remote_read_description would do anything on this target
8842 and architecture, 0 otherwise. */
8845 remote_read_description_p (struct target_ops
*target
)
8847 struct remote_g_packet_data
*data
8848 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
8850 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
8856 static const struct target_desc
*
8857 remote_read_description (struct target_ops
*target
)
8859 struct remote_g_packet_data
*data
8860 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
8862 /* Do not try this during initial connection, when we do not know
8863 whether there is a running but stopped thread. */
8864 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
8867 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
8869 struct remote_g_packet_guess
*guess
;
8871 int bytes
= send_g_packet ();
8874 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
8876 if (guess
->bytes
== bytes
)
8877 return guess
->tdesc
;
8879 /* We discard the g packet. A minor optimization would be to
8880 hold on to it, and fill the register cache once we have selected
8881 an architecture, but it's too tricky to do safely. */
8887 /* Remote file transfer support. This is host-initiated I/O, not
8888 target-initiated; for target-initiated, see remote-fileio.c. */
8890 /* If *LEFT is at least the length of STRING, copy STRING to
8891 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8892 decrease *LEFT. Otherwise raise an error. */
8895 remote_buffer_add_string (char **buffer
, int *left
, char *string
)
8897 int len
= strlen (string
);
8900 error (_("Packet too long for target."));
8902 memcpy (*buffer
, string
, len
);
8906 /* NUL-terminate the buffer as a convenience, if there is
8912 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
8913 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8914 decrease *LEFT. Otherwise raise an error. */
8917 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
8920 if (2 * len
> *left
)
8921 error (_("Packet too long for target."));
8923 bin2hex (bytes
, *buffer
, len
);
8927 /* NUL-terminate the buffer as a convenience, if there is
8933 /* If *LEFT is large enough, convert VALUE to hex and add it to
8934 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8935 decrease *LEFT. Otherwise raise an error. */
8938 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
8940 int len
= hexnumlen (value
);
8943 error (_("Packet too long for target."));
8945 hexnumstr (*buffer
, value
);
8949 /* NUL-terminate the buffer as a convenience, if there is
8955 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
8956 value, *REMOTE_ERRNO to the remote error number or zero if none
8957 was included, and *ATTACHMENT to point to the start of the annex
8958 if any. The length of the packet isn't needed here; there may
8959 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
8961 Return 0 if the packet could be parsed, -1 if it could not. If
8962 -1 is returned, the other variables may not be initialized. */
8965 remote_hostio_parse_result (char *buffer
, int *retcode
,
8966 int *remote_errno
, char **attachment
)
8973 if (buffer
[0] != 'F')
8977 *retcode
= strtol (&buffer
[1], &p
, 16);
8978 if (errno
!= 0 || p
== &buffer
[1])
8981 /* Check for ",errno". */
8985 *remote_errno
= strtol (p
+ 1, &p2
, 16);
8986 if (errno
!= 0 || p
+ 1 == p2
)
8991 /* Check for ";attachment". If there is no attachment, the
8992 packet should end here. */
8995 *attachment
= p
+ 1;
8998 else if (*p
== '\0')
9004 /* Send a prepared I/O packet to the target and read its response.
9005 The prepared packet is in the global RS->BUF before this function
9006 is called, and the answer is there when we return.
9008 COMMAND_BYTES is the length of the request to send, which may include
9009 binary data. WHICH_PACKET is the packet configuration to check
9010 before attempting a packet. If an error occurs, *REMOTE_ERRNO
9011 is set to the error number and -1 is returned. Otherwise the value
9012 returned by the function is returned.
9014 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
9015 attachment is expected; an error will be reported if there's a
9016 mismatch. If one is found, *ATTACHMENT will be set to point into
9017 the packet buffer and *ATTACHMENT_LEN will be set to the
9018 attachment's length. */
9021 remote_hostio_send_command (int command_bytes
, int which_packet
,
9022 int *remote_errno
, char **attachment
,
9023 int *attachment_len
)
9025 struct remote_state
*rs
= get_remote_state ();
9026 int ret
, bytes_read
;
9027 char *attachment_tmp
;
9030 || remote_protocol_packets
[which_packet
].support
== PACKET_DISABLE
)
9032 *remote_errno
= FILEIO_ENOSYS
;
9036 putpkt_binary (rs
->buf
, command_bytes
);
9037 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
9039 /* If it timed out, something is wrong. Don't try to parse the
9043 *remote_errno
= FILEIO_EINVAL
;
9047 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
9050 *remote_errno
= FILEIO_EINVAL
;
9052 case PACKET_UNKNOWN
:
9053 *remote_errno
= FILEIO_ENOSYS
;
9059 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
9062 *remote_errno
= FILEIO_EINVAL
;
9066 /* Make sure we saw an attachment if and only if we expected one. */
9067 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
9068 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
9070 *remote_errno
= FILEIO_EINVAL
;
9074 /* If an attachment was found, it must point into the packet buffer;
9075 work out how many bytes there were. */
9076 if (attachment_tmp
!= NULL
)
9078 *attachment
= attachment_tmp
;
9079 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
9085 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
9086 remote file descriptor, or -1 if an error occurs (and set
9090 remote_hostio_open (const char *filename
, int flags
, int mode
,
9093 struct remote_state
*rs
= get_remote_state ();
9095 int left
= get_remote_packet_size () - 1;
9097 remote_buffer_add_string (&p
, &left
, "vFile:open:");
9099 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
9101 remote_buffer_add_string (&p
, &left
, ",");
9103 remote_buffer_add_int (&p
, &left
, flags
);
9104 remote_buffer_add_string (&p
, &left
, ",");
9106 remote_buffer_add_int (&p
, &left
, mode
);
9108 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
9109 remote_errno
, NULL
, NULL
);
9112 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
9113 Return the number of bytes written, or -1 if an error occurs (and
9114 set *REMOTE_ERRNO). */
9117 remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
9118 ULONGEST offset
, int *remote_errno
)
9120 struct remote_state
*rs
= get_remote_state ();
9122 int left
= get_remote_packet_size ();
9125 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
9127 remote_buffer_add_int (&p
, &left
, fd
);
9128 remote_buffer_add_string (&p
, &left
, ",");
9130 remote_buffer_add_int (&p
, &left
, offset
);
9131 remote_buffer_add_string (&p
, &left
, ",");
9133 p
+= remote_escape_output (write_buf
, len
, p
, &out_len
,
9134 get_remote_packet_size () - (p
- rs
->buf
));
9136 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
9137 remote_errno
, NULL
, NULL
);
9140 /* Read up to LEN bytes FD on the remote target into READ_BUF
9141 Return the number of bytes read, or -1 if an error occurs (and
9142 set *REMOTE_ERRNO). */
9145 remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
9146 ULONGEST offset
, int *remote_errno
)
9148 struct remote_state
*rs
= get_remote_state ();
9151 int left
= get_remote_packet_size ();
9152 int ret
, attachment_len
;
9155 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
9157 remote_buffer_add_int (&p
, &left
, fd
);
9158 remote_buffer_add_string (&p
, &left
, ",");
9160 remote_buffer_add_int (&p
, &left
, len
);
9161 remote_buffer_add_string (&p
, &left
, ",");
9163 remote_buffer_add_int (&p
, &left
, offset
);
9165 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
9166 remote_errno
, &attachment
,
9172 read_len
= remote_unescape_input (attachment
, attachment_len
,
9174 if (read_len
!= ret
)
9175 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
9180 /* Close FD on the remote target. Return 0, or -1 if an error occurs
9181 (and set *REMOTE_ERRNO). */
9184 remote_hostio_close (int fd
, int *remote_errno
)
9186 struct remote_state
*rs
= get_remote_state ();
9188 int left
= get_remote_packet_size () - 1;
9190 remote_buffer_add_string (&p
, &left
, "vFile:close:");
9192 remote_buffer_add_int (&p
, &left
, fd
);
9194 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
9195 remote_errno
, NULL
, NULL
);
9198 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
9199 occurs (and set *REMOTE_ERRNO). */
9202 remote_hostio_unlink (const char *filename
, int *remote_errno
)
9204 struct remote_state
*rs
= get_remote_state ();
9206 int left
= get_remote_packet_size () - 1;
9208 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
9210 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
9213 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
9214 remote_errno
, NULL
, NULL
);
9218 remote_fileio_errno_to_host (int errnum
)
9242 case FILEIO_ENOTDIR
:
9262 case FILEIO_ENAMETOOLONG
:
9263 return ENAMETOOLONG
;
9269 remote_hostio_error (int errnum
)
9271 int host_error
= remote_fileio_errno_to_host (errnum
);
9273 if (host_error
== -1)
9274 error (_("Unknown remote I/O error %d"), errnum
);
9276 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
9280 remote_hostio_close_cleanup (void *opaque
)
9282 int fd
= *(int *) opaque
;
9285 remote_hostio_close (fd
, &remote_errno
);
9290 remote_bfd_iovec_open (struct bfd
*abfd
, void *open_closure
)
9292 const char *filename
= bfd_get_filename (abfd
);
9293 int fd
, remote_errno
;
9296 gdb_assert (remote_filename_p (filename
));
9298 fd
= remote_hostio_open (filename
+ 7, FILEIO_O_RDONLY
, 0, &remote_errno
);
9301 errno
= remote_fileio_errno_to_host (remote_errno
);
9302 bfd_set_error (bfd_error_system_call
);
9306 stream
= xmalloc (sizeof (int));
9312 remote_bfd_iovec_close (struct bfd
*abfd
, void *stream
)
9314 int fd
= *(int *)stream
;
9319 /* Ignore errors on close; these may happen if the remote
9320 connection was already torn down. */
9321 remote_hostio_close (fd
, &remote_errno
);
9327 remote_bfd_iovec_pread (struct bfd
*abfd
, void *stream
, void *buf
,
9328 file_ptr nbytes
, file_ptr offset
)
9330 int fd
= *(int *)stream
;
9332 file_ptr pos
, bytes
;
9335 while (nbytes
> pos
)
9337 bytes
= remote_hostio_pread (fd
, (char *)buf
+ pos
, nbytes
- pos
,
9338 offset
+ pos
, &remote_errno
);
9340 /* Success, but no bytes, means end-of-file. */
9344 errno
= remote_fileio_errno_to_host (remote_errno
);
9345 bfd_set_error (bfd_error_system_call
);
9356 remote_bfd_iovec_stat (struct bfd
*abfd
, void *stream
, struct stat
*sb
)
9358 /* FIXME: We should probably implement remote_hostio_stat. */
9359 sb
->st_size
= INT_MAX
;
9364 remote_filename_p (const char *filename
)
9366 return strncmp (filename
, "remote:", 7) == 0;
9370 remote_bfd_open (const char *remote_file
, const char *target
)
9372 return bfd_openr_iovec (remote_file
, target
,
9373 remote_bfd_iovec_open
, NULL
,
9374 remote_bfd_iovec_pread
,
9375 remote_bfd_iovec_close
,
9376 remote_bfd_iovec_stat
);
9380 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
9382 struct cleanup
*back_to
, *close_cleanup
;
9383 int retcode
, fd
, remote_errno
, bytes
, io_size
;
9386 int bytes_in_buffer
;
9391 error (_("command can only be used with remote target"));
9393 file
= fopen (local_file
, "rb");
9395 perror_with_name (local_file
);
9396 back_to
= make_cleanup_fclose (file
);
9398 fd
= remote_hostio_open (remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
9400 0700, &remote_errno
);
9402 remote_hostio_error (remote_errno
);
9404 /* Send up to this many bytes at once. They won't all fit in the
9405 remote packet limit, so we'll transfer slightly fewer. */
9406 io_size
= get_remote_packet_size ();
9407 buffer
= xmalloc (io_size
);
9408 make_cleanup (xfree
, buffer
);
9410 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
9412 bytes_in_buffer
= 0;
9415 while (bytes_in_buffer
|| !saw_eof
)
9419 bytes
= fread (buffer
+ bytes_in_buffer
, 1,
9420 io_size
- bytes_in_buffer
,
9425 error (_("Error reading %s."), local_file
);
9428 /* EOF. Unless there is something still in the
9429 buffer from the last iteration, we are done. */
9431 if (bytes_in_buffer
== 0)
9439 bytes
+= bytes_in_buffer
;
9440 bytes_in_buffer
= 0;
9442 retcode
= remote_hostio_pwrite (fd
, buffer
, bytes
,
9443 offset
, &remote_errno
);
9446 remote_hostio_error (remote_errno
);
9447 else if (retcode
== 0)
9448 error (_("Remote write of %d bytes returned 0!"), bytes
);
9449 else if (retcode
< bytes
)
9451 /* Short write. Save the rest of the read data for the next
9453 bytes_in_buffer
= bytes
- retcode
;
9454 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
9460 discard_cleanups (close_cleanup
);
9461 if (remote_hostio_close (fd
, &remote_errno
))
9462 remote_hostio_error (remote_errno
);
9465 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
9466 do_cleanups (back_to
);
9470 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
9472 struct cleanup
*back_to
, *close_cleanup
;
9473 int fd
, remote_errno
, bytes
, io_size
;
9479 error (_("command can only be used with remote target"));
9481 fd
= remote_hostio_open (remote_file
, FILEIO_O_RDONLY
, 0, &remote_errno
);
9483 remote_hostio_error (remote_errno
);
9485 file
= fopen (local_file
, "wb");
9487 perror_with_name (local_file
);
9488 back_to
= make_cleanup_fclose (file
);
9490 /* Send up to this many bytes at once. They won't all fit in the
9491 remote packet limit, so we'll transfer slightly fewer. */
9492 io_size
= get_remote_packet_size ();
9493 buffer
= xmalloc (io_size
);
9494 make_cleanup (xfree
, buffer
);
9496 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
9501 bytes
= remote_hostio_pread (fd
, buffer
, io_size
, offset
, &remote_errno
);
9503 /* Success, but no bytes, means end-of-file. */
9506 remote_hostio_error (remote_errno
);
9510 bytes
= fwrite (buffer
, 1, bytes
, file
);
9512 perror_with_name (local_file
);
9515 discard_cleanups (close_cleanup
);
9516 if (remote_hostio_close (fd
, &remote_errno
))
9517 remote_hostio_error (remote_errno
);
9520 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
9521 do_cleanups (back_to
);
9525 remote_file_delete (const char *remote_file
, int from_tty
)
9527 int retcode
, remote_errno
;
9530 error (_("command can only be used with remote target"));
9532 retcode
= remote_hostio_unlink (remote_file
, &remote_errno
);
9534 remote_hostio_error (remote_errno
);
9537 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
9541 remote_put_command (char *args
, int from_tty
)
9543 struct cleanup
*back_to
;
9547 error_no_arg (_("file to put"));
9549 argv
= gdb_buildargv (args
);
9550 back_to
= make_cleanup_freeargv (argv
);
9551 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
9552 error (_("Invalid parameters to remote put"));
9554 remote_file_put (argv
[0], argv
[1], from_tty
);
9556 do_cleanups (back_to
);
9560 remote_get_command (char *args
, int from_tty
)
9562 struct cleanup
*back_to
;
9566 error_no_arg (_("file to get"));
9568 argv
= gdb_buildargv (args
);
9569 back_to
= make_cleanup_freeargv (argv
);
9570 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
9571 error (_("Invalid parameters to remote get"));
9573 remote_file_get (argv
[0], argv
[1], from_tty
);
9575 do_cleanups (back_to
);
9579 remote_delete_command (char *args
, int from_tty
)
9581 struct cleanup
*back_to
;
9585 error_no_arg (_("file to delete"));
9587 argv
= gdb_buildargv (args
);
9588 back_to
= make_cleanup_freeargv (argv
);
9589 if (argv
[0] == NULL
|| argv
[1] != NULL
)
9590 error (_("Invalid parameters to remote delete"));
9592 remote_file_delete (argv
[0], from_tty
);
9594 do_cleanups (back_to
);
9598 remote_command (char *args
, int from_tty
)
9600 help_list (remote_cmdlist
, "remote ", -1, gdb_stdout
);
9604 remote_can_execute_reverse (void)
9606 if (remote_protocol_packets
[PACKET_bs
].support
== PACKET_ENABLE
9607 || remote_protocol_packets
[PACKET_bc
].support
== PACKET_ENABLE
)
9614 remote_supports_non_stop (void)
9620 remote_supports_multi_process (void)
9622 struct remote_state
*rs
= get_remote_state ();
9624 return remote_multi_process_p (rs
);
9628 remote_supports_cond_tracepoints (void)
9630 struct remote_state
*rs
= get_remote_state ();
9632 return rs
->cond_tracepoints
;
9636 remote_supports_fast_tracepoints (void)
9638 struct remote_state
*rs
= get_remote_state ();
9640 return rs
->fast_tracepoints
;
9644 remote_supports_static_tracepoints (void)
9646 struct remote_state
*rs
= get_remote_state ();
9648 return rs
->static_tracepoints
;
9652 remote_trace_init (void)
9655 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9656 if (strcmp (target_buf
, "OK") != 0)
9657 error (_("Target does not support this command."));
9660 static void free_actions_list (char **actions_list
);
9661 static void free_actions_list_cleanup_wrapper (void *);
9663 free_actions_list_cleanup_wrapper (void *al
)
9665 free_actions_list (al
);
9669 free_actions_list (char **actions_list
)
9673 if (actions_list
== 0)
9676 for (ndx
= 0; actions_list
[ndx
]; ndx
++)
9677 xfree (actions_list
[ndx
]);
9679 xfree (actions_list
);
9682 /* Recursive routine to walk through command list including loops, and
9683 download packets for each command. */
9686 remote_download_command_source (int num
, ULONGEST addr
,
9687 struct command_line
*cmds
)
9689 struct remote_state
*rs
= get_remote_state ();
9690 struct command_line
*cmd
;
9692 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
9694 QUIT
; /* Allow user to bail out with ^C. */
9695 strcpy (rs
->buf
, "QTDPsrc:");
9696 encode_source_string (num
, addr
, "cmd", cmd
->line
,
9697 rs
->buf
+ strlen (rs
->buf
),
9698 rs
->buf_size
- strlen (rs
->buf
));
9700 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9701 if (strcmp (target_buf
, "OK"))
9702 warning (_("Target does not support source download."));
9704 if (cmd
->control_type
== while_control
9705 || cmd
->control_type
== while_stepping_control
)
9707 remote_download_command_source (num
, addr
, *cmd
->body_list
);
9709 QUIT
; /* Allow user to bail out with ^C. */
9710 strcpy (rs
->buf
, "QTDPsrc:");
9711 encode_source_string (num
, addr
, "cmd", "end",
9712 rs
->buf
+ strlen (rs
->buf
),
9713 rs
->buf_size
- strlen (rs
->buf
));
9715 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9716 if (strcmp (target_buf
, "OK"))
9717 warning (_("Target does not support source download."));
9723 remote_download_tracepoint (struct breakpoint
*t
)
9725 struct bp_location
*loc
;
9730 char **stepping_actions
;
9732 struct cleanup
*old_chain
= NULL
;
9733 struct agent_expr
*aexpr
;
9734 struct cleanup
*aexpr_chain
= NULL
;
9737 /* Iterate over all the tracepoint locations. It's up to the target to
9738 notice multiple tracepoint packets with the same number but different
9739 addresses, and treat them as multiple locations. */
9740 for (loc
= t
->loc
; loc
; loc
= loc
->next
)
9742 encode_actions (t
, loc
, &tdp_actions
, &stepping_actions
);
9743 old_chain
= make_cleanup (free_actions_list_cleanup_wrapper
,
9745 (void) make_cleanup (free_actions_list_cleanup_wrapper
,
9748 tpaddr
= loc
->address
;
9749 sprintf_vma (addrbuf
, tpaddr
);
9750 sprintf (buf
, "QTDP:%x:%s:%c:%lx:%x", t
->number
,
9751 addrbuf
, /* address */
9752 (t
->enable_state
== bp_enabled
? 'E' : 'D'),
9753 t
->step_count
, t
->pass_count
);
9754 /* Fast tracepoints are mostly handled by the target, but we can
9755 tell the target how big of an instruction block should be moved
9757 if (t
->type
== bp_fast_tracepoint
)
9759 /* Only test for support at download time; we may not know
9760 target capabilities at definition time. */
9761 if (remote_supports_fast_tracepoints ())
9765 if (gdbarch_fast_tracepoint_valid_at (target_gdbarch
,
9766 tpaddr
, &isize
, NULL
))
9767 sprintf (buf
+ strlen (buf
), ":F%x", isize
);
9769 /* If it passed validation at definition but fails now,
9770 something is very wrong. */
9771 internal_error (__FILE__
, __LINE__
,
9772 _("Fast tracepoint not "
9773 "valid during download"));
9776 /* Fast tracepoints are functionally identical to regular
9777 tracepoints, so don't take lack of support as a reason to
9778 give up on the trace run. */
9779 warning (_("Target does not support fast tracepoints, "
9780 "downloading %d as regular tracepoint"), t
->number
);
9782 else if (t
->type
== bp_static_tracepoint
)
9784 /* Only test for support at download time; we may not know
9785 target capabilities at definition time. */
9786 if (remote_supports_static_tracepoints ())
9788 struct static_tracepoint_marker marker
;
9790 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
9793 error (_("Static tracepoint not valid during download"));
9796 /* Fast tracepoints are functionally identical to regular
9797 tracepoints, so don't take lack of support as a reason
9798 to give up on the trace run. */
9799 error (_("Target does not support static tracepoints"));
9801 /* If the tracepoint has a conditional, make it into an agent
9802 expression and append to the definition. */
9805 /* Only test support at download time, we may not know target
9806 capabilities at definition time. */
9807 if (remote_supports_cond_tracepoints ())
9809 aexpr
= gen_eval_for_expr (tpaddr
, loc
->cond
);
9810 aexpr_chain
= make_cleanup_free_agent_expr (aexpr
);
9811 sprintf (buf
+ strlen (buf
), ":X%x,", aexpr
->len
);
9812 pkt
= buf
+ strlen (buf
);
9813 for (ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
9814 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
9816 do_cleanups (aexpr_chain
);
9819 warning (_("Target does not support conditional tracepoints, "
9820 "ignoring tp %d cond"), t
->number
);
9823 if (t
->commands
|| *default_collect
)
9826 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9827 if (strcmp (target_buf
, "OK"))
9828 error (_("Target does not support tracepoints."));
9830 /* do_single_steps (t); */
9833 for (ndx
= 0; tdp_actions
[ndx
]; ndx
++)
9835 QUIT
; /* Allow user to bail out with ^C. */
9836 sprintf (buf
, "QTDP:-%x:%s:%s%c",
9837 t
->number
, addrbuf
, /* address */
9839 ((tdp_actions
[ndx
+ 1] || stepping_actions
)
9842 remote_get_noisy_reply (&target_buf
,
9844 if (strcmp (target_buf
, "OK"))
9845 error (_("Error on target while setting tracepoints."));
9848 if (stepping_actions
)
9850 for (ndx
= 0; stepping_actions
[ndx
]; ndx
++)
9852 QUIT
; /* Allow user to bail out with ^C. */
9853 sprintf (buf
, "QTDP:-%x:%s:%s%s%s",
9854 t
->number
, addrbuf
, /* address */
9855 ((ndx
== 0) ? "S" : ""),
9856 stepping_actions
[ndx
],
9857 (stepping_actions
[ndx
+ 1] ? "-" : ""));
9859 remote_get_noisy_reply (&target_buf
,
9861 if (strcmp (target_buf
, "OK"))
9862 error (_("Error on target while setting tracepoints."));
9866 if (remote_protocol_packets
[PACKET_TracepointSource
].support
9871 strcpy (buf
, "QTDPsrc:");
9872 encode_source_string (t
->number
, loc
->address
,
9873 "at", t
->addr_string
, buf
+ strlen (buf
),
9874 2048 - strlen (buf
));
9877 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9878 if (strcmp (target_buf
, "OK"))
9879 warning (_("Target does not support source download."));
9883 strcpy (buf
, "QTDPsrc:");
9884 encode_source_string (t
->number
, loc
->address
,
9885 "cond", t
->cond_string
, buf
+ strlen (buf
),
9886 2048 - strlen (buf
));
9888 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9889 if (strcmp (target_buf
, "OK"))
9890 warning (_("Target does not support source download."));
9892 remote_download_command_source (t
->number
, loc
->address
,
9893 breakpoint_commands (t
));
9896 do_cleanups (old_chain
);
9901 remote_download_trace_state_variable (struct trace_state_variable
*tsv
)
9903 struct remote_state
*rs
= get_remote_state ();
9906 sprintf (rs
->buf
, "QTDV:%x:%s:%x:",
9907 tsv
->number
, phex ((ULONGEST
) tsv
->initial_value
, 8), tsv
->builtin
);
9908 p
= rs
->buf
+ strlen (rs
->buf
);
9909 if ((p
- rs
->buf
) + strlen (tsv
->name
) * 2 >= get_remote_packet_size ())
9910 error (_("Trace state variable name too long for tsv definition packet"));
9911 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
->name
), p
, 0);
9914 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9915 if (*target_buf
== '\0')
9916 error (_("Target does not support this command."));
9917 if (strcmp (target_buf
, "OK") != 0)
9918 error (_("Error on target while downloading trace state variable."));
9922 remote_trace_set_readonly_regions (void)
9930 return; /* No information to give. */
9932 strcpy (target_buf
, "QTro");
9933 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
9935 char tmp1
[40], tmp2
[40];
9937 if ((s
->flags
& SEC_LOAD
) == 0 ||
9938 /* (s->flags & SEC_CODE) == 0 || */
9939 (s
->flags
& SEC_READONLY
) == 0)
9943 vma
= bfd_get_section_vma (,s
);
9944 size
= bfd_get_section_size (s
);
9945 sprintf_vma (tmp1
, vma
);
9946 sprintf_vma (tmp2
, vma
+ size
);
9947 sprintf (target_buf
+ strlen (target_buf
),
9948 ":%s,%s", tmp1
, tmp2
);
9952 putpkt (target_buf
);
9953 getpkt (&target_buf
, &target_buf_size
, 0);
9958 remote_trace_start (void)
9961 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9962 if (*target_buf
== '\0')
9963 error (_("Target does not support this command."));
9964 if (strcmp (target_buf
, "OK") != 0)
9965 error (_("Bogus reply from target: %s"), target_buf
);
9969 remote_get_trace_status (struct trace_status
*ts
)
9972 /* FIXME we need to get register block size some other way. */
9973 extern int trace_regblock_size
;
9975 trace_regblock_size
= get_remote_arch_state ()->sizeof_g_packet
;
9977 putpkt ("qTStatus");
9978 p
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9980 /* If the remote target doesn't do tracing, flag it. */
9984 /* We're working with a live target. */
9987 /* Set some defaults. */
9988 ts
->running_known
= 0;
9989 ts
->stop_reason
= trace_stop_reason_unknown
;
9990 ts
->traceframe_count
= -1;
9991 ts
->buffer_free
= 0;
9994 error (_("Bogus trace status reply from target: %s"), target_buf
);
9996 parse_trace_status (p
, ts
);
10002 remote_trace_stop (void)
10005 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
10006 if (*target_buf
== '\0')
10007 error (_("Target does not support this command."));
10008 if (strcmp (target_buf
, "OK") != 0)
10009 error (_("Bogus reply from target: %s"), target_buf
);
10013 remote_trace_find (enum trace_find_type type
, int num
,
10014 ULONGEST addr1
, ULONGEST addr2
,
10017 struct remote_state
*rs
= get_remote_state ();
10019 int target_frameno
= -1, target_tracept
= -1;
10021 /* Lookups other than by absolute frame number depend on the current
10022 trace selected, so make sure it is correct on the remote end
10024 if (type
!= tfind_number
)
10025 set_remote_traceframe ();
10028 strcpy (p
, "QTFrame:");
10029 p
= strchr (p
, '\0');
10033 sprintf (p
, "%x", num
);
10036 sprintf (p
, "pc:%s", phex_nz (addr1
, 0));
10039 sprintf (p
, "tdp:%x", num
);
10042 sprintf (p
, "range:%s:%s", phex_nz (addr1
, 0), phex_nz (addr2
, 0));
10044 case tfind_outside
:
10045 sprintf (p
, "outside:%s:%s", phex_nz (addr1
, 0), phex_nz (addr2
, 0));
10048 error (_("Unknown trace find type %d"), type
);
10052 reply
= remote_get_noisy_reply (&(rs
->buf
), &sizeof_pkt
);
10053 if (*reply
== '\0')
10054 error (_("Target does not support this command."));
10056 while (reply
&& *reply
)
10061 target_frameno
= (int) strtol (p
, &reply
, 16);
10063 error (_("Unable to parse trace frame number"));
10064 /* Don't update our remote traceframe number cache on failure
10065 to select a remote traceframe. */
10066 if (target_frameno
== -1)
10071 target_tracept
= (int) strtol (p
, &reply
, 16);
10073 error (_("Unable to parse tracepoint number"));
10075 case 'O': /* "OK"? */
10076 if (reply
[1] == 'K' && reply
[2] == '\0')
10079 error (_("Bogus reply from target: %s"), reply
);
10082 error (_("Bogus reply from target: %s"), reply
);
10085 *tpp
= target_tracept
;
10087 remote_traceframe_number
= target_frameno
;
10088 return target_frameno
;
10092 remote_get_trace_state_variable_value (int tsvnum
, LONGEST
*val
)
10094 struct remote_state
*rs
= get_remote_state ();
10098 set_remote_traceframe ();
10100 sprintf (rs
->buf
, "qTV:%x", tsvnum
);
10102 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
10103 if (reply
&& *reply
)
10107 unpack_varlen_hex (reply
+ 1, &uval
);
10108 *val
= (LONGEST
) uval
;
10116 remote_save_trace_data (const char *filename
)
10118 struct remote_state
*rs
= get_remote_state ();
10122 strcpy (p
, "QTSave:");
10124 if ((p
- rs
->buf
) + strlen (filename
) * 2 >= get_remote_packet_size ())
10125 error (_("Remote file name too long for trace save packet"));
10126 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, 0);
10129 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
10130 if (*reply
!= '\0')
10131 error (_("Target does not support this command."));
10132 if (strcmp (reply
, "OK") != 0)
10133 error (_("Bogus reply from target: %s"), reply
);
10137 /* This is basically a memory transfer, but needs to be its own packet
10138 because we don't know how the target actually organizes its trace
10139 memory, plus we want to be able to ask for as much as possible, but
10140 not be unhappy if we don't get as much as we ask for. */
10143 remote_get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
10145 struct remote_state
*rs
= get_remote_state ();
10151 strcpy (p
, "qTBuffer:");
10153 p
+= hexnumstr (p
, offset
);
10155 p
+= hexnumstr (p
, len
);
10159 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
10160 if (reply
&& *reply
)
10162 /* 'l' by itself means we're at the end of the buffer and
10163 there is nothing more to get. */
10167 /* Convert the reply into binary. Limit the number of bytes to
10168 convert according to our passed-in buffer size, rather than
10169 what was returned in the packet; if the target is
10170 unexpectedly generous and gives us a bigger reply than we
10171 asked for, we don't want to crash. */
10172 rslt
= hex2bin (target_buf
, buf
, len
);
10176 /* Something went wrong, flag as an error. */
10181 remote_set_disconnected_tracing (int val
)
10183 struct remote_state
*rs
= get_remote_state ();
10185 if (rs
->disconnected_tracing
)
10189 sprintf (rs
->buf
, "QTDisconnected:%x", val
);
10191 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
10192 if (*reply
== '\0')
10193 error (_("Target does not support this command."));
10194 if (strcmp (reply
, "OK") != 0)
10195 error (_("Bogus reply from target: %s"), reply
);
10198 warning (_("Target does not support disconnected tracing."));
10202 remote_core_of_thread (struct target_ops
*ops
, ptid_t ptid
)
10204 struct thread_info
*info
= find_thread_ptid (ptid
);
10206 if (info
&& info
->private)
10207 return info
->private->core
;
10212 remote_set_circular_trace_buffer (int val
)
10214 struct remote_state
*rs
= get_remote_state ();
10217 sprintf (rs
->buf
, "QTBuffer:circular:%x", val
);
10219 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
10220 if (*reply
== '\0')
10221 error (_("Target does not support this command."));
10222 if (strcmp (reply
, "OK") != 0)
10223 error (_("Bogus reply from target: %s"), reply
);
10226 static struct traceframe_info
*
10227 remote_traceframe_info (void)
10231 text
= target_read_stralloc (¤t_target
,
10232 TARGET_OBJECT_TRACEFRAME_INFO
, NULL
);
10235 struct traceframe_info
*info
;
10236 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
10238 info
= parse_traceframe_info (text
);
10239 do_cleanups (back_to
);
10247 init_remote_ops (void)
10249 remote_ops
.to_shortname
= "remote";
10250 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
10251 remote_ops
.to_doc
=
10252 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
10253 Specify the serial device it is connected to\n\
10254 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
10255 remote_ops
.to_open
= remote_open
;
10256 remote_ops
.to_close
= remote_close
;
10257 remote_ops
.to_detach
= remote_detach
;
10258 remote_ops
.to_disconnect
= remote_disconnect
;
10259 remote_ops
.to_resume
= remote_resume
;
10260 remote_ops
.to_wait
= remote_wait
;
10261 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
10262 remote_ops
.to_store_registers
= remote_store_registers
;
10263 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
10264 remote_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
10265 remote_ops
.to_files_info
= remote_files_info
;
10266 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
10267 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
10268 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
10269 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
10270 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
10271 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
10272 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
10273 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
10274 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
10275 remote_ops
.to_kill
= remote_kill
;
10276 remote_ops
.to_load
= generic_load
;
10277 remote_ops
.to_mourn_inferior
= remote_mourn
;
10278 remote_ops
.to_pass_signals
= remote_pass_signals
;
10279 remote_ops
.to_thread_alive
= remote_thread_alive
;
10280 remote_ops
.to_find_new_threads
= remote_threads_info
;
10281 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
10282 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
10283 remote_ops
.to_get_ada_task_ptid
= remote_get_ada_task_ptid
;
10284 remote_ops
.to_stop
= remote_stop
;
10285 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
10286 remote_ops
.to_rcmd
= remote_rcmd
;
10287 remote_ops
.to_log_command
= serial_log_command
;
10288 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
10289 remote_ops
.to_stratum
= process_stratum
;
10290 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
10291 remote_ops
.to_has_memory
= default_child_has_memory
;
10292 remote_ops
.to_has_stack
= default_child_has_stack
;
10293 remote_ops
.to_has_registers
= default_child_has_registers
;
10294 remote_ops
.to_has_execution
= default_child_has_execution
;
10295 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
10296 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
10297 remote_ops
.to_magic
= OPS_MAGIC
;
10298 remote_ops
.to_memory_map
= remote_memory_map
;
10299 remote_ops
.to_flash_erase
= remote_flash_erase
;
10300 remote_ops
.to_flash_done
= remote_flash_done
;
10301 remote_ops
.to_read_description
= remote_read_description
;
10302 remote_ops
.to_search_memory
= remote_search_memory
;
10303 remote_ops
.to_can_async_p
= remote_can_async_p
;
10304 remote_ops
.to_is_async_p
= remote_is_async_p
;
10305 remote_ops
.to_async
= remote_async
;
10306 remote_ops
.to_async_mask
= remote_async_mask
;
10307 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
10308 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
10309 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
10310 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
10311 remote_ops
.to_trace_init
= remote_trace_init
;
10312 remote_ops
.to_download_tracepoint
= remote_download_tracepoint
;
10313 remote_ops
.to_download_trace_state_variable
10314 = remote_download_trace_state_variable
;
10315 remote_ops
.to_trace_set_readonly_regions
= remote_trace_set_readonly_regions
;
10316 remote_ops
.to_trace_start
= remote_trace_start
;
10317 remote_ops
.to_get_trace_status
= remote_get_trace_status
;
10318 remote_ops
.to_trace_stop
= remote_trace_stop
;
10319 remote_ops
.to_trace_find
= remote_trace_find
;
10320 remote_ops
.to_get_trace_state_variable_value
10321 = remote_get_trace_state_variable_value
;
10322 remote_ops
.to_save_trace_data
= remote_save_trace_data
;
10323 remote_ops
.to_upload_tracepoints
= remote_upload_tracepoints
;
10324 remote_ops
.to_upload_trace_state_variables
10325 = remote_upload_trace_state_variables
;
10326 remote_ops
.to_get_raw_trace_data
= remote_get_raw_trace_data
;
10327 remote_ops
.to_set_disconnected_tracing
= remote_set_disconnected_tracing
;
10328 remote_ops
.to_set_circular_trace_buffer
= remote_set_circular_trace_buffer
;
10329 remote_ops
.to_core_of_thread
= remote_core_of_thread
;
10330 remote_ops
.to_verify_memory
= remote_verify_memory
;
10331 remote_ops
.to_get_tib_address
= remote_get_tib_address
;
10332 remote_ops
.to_set_permissions
= remote_set_permissions
;
10333 remote_ops
.to_static_tracepoint_marker_at
10334 = remote_static_tracepoint_marker_at
;
10335 remote_ops
.to_static_tracepoint_markers_by_strid
10336 = remote_static_tracepoint_markers_by_strid
;
10337 remote_ops
.to_traceframe_info
= remote_traceframe_info
;
10340 /* Set up the extended remote vector by making a copy of the standard
10341 remote vector and adding to it. */
10344 init_extended_remote_ops (void)
10346 extended_remote_ops
= remote_ops
;
10348 extended_remote_ops
.to_shortname
= "extended-remote";
10349 extended_remote_ops
.to_longname
=
10350 "Extended remote serial target in gdb-specific protocol";
10351 extended_remote_ops
.to_doc
=
10352 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
10353 Specify the serial device it is connected to (e.g. /dev/ttya).";
10354 extended_remote_ops
.to_open
= extended_remote_open
;
10355 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
10356 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
10357 extended_remote_ops
.to_detach
= extended_remote_detach
;
10358 extended_remote_ops
.to_attach
= extended_remote_attach
;
10359 extended_remote_ops
.to_kill
= extended_remote_kill
;
10363 remote_can_async_p (void)
10365 if (!target_async_permitted
)
10366 /* We only enable async when the user specifically asks for it. */
10369 /* We're async whenever the serial device is. */
10370 return remote_async_mask_value
&& serial_can_async_p (remote_desc
);
10374 remote_is_async_p (void)
10376 if (!target_async_permitted
)
10377 /* We only enable async when the user specifically asks for it. */
10380 /* We're async whenever the serial device is. */
10381 return remote_async_mask_value
&& serial_is_async_p (remote_desc
);
10384 /* Pass the SERIAL event on and up to the client. One day this code
10385 will be able to delay notifying the client of an event until the
10386 point where an entire packet has been received. */
10388 static void (*async_client_callback
) (enum inferior_event_type event_type
,
10390 static void *async_client_context
;
10391 static serial_event_ftype remote_async_serial_handler
;
10394 remote_async_serial_handler (struct serial
*scb
, void *context
)
10396 /* Don't propogate error information up to the client. Instead let
10397 the client find out about the error by querying the target. */
10398 async_client_callback (INF_REG_EVENT
, async_client_context
);
10402 remote_async_inferior_event_handler (gdb_client_data data
)
10404 inferior_event_handler (INF_REG_EVENT
, NULL
);
10408 remote_async_get_pending_events_handler (gdb_client_data data
)
10410 remote_get_pending_stop_replies ();
10414 remote_async (void (*callback
) (enum inferior_event_type event_type
,
10415 void *context
), void *context
)
10417 if (remote_async_mask_value
== 0)
10418 internal_error (__FILE__
, __LINE__
,
10419 _("Calling remote_async when async is masked"));
10421 if (callback
!= NULL
)
10423 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
10424 async_client_callback
= callback
;
10425 async_client_context
= context
;
10428 serial_async (remote_desc
, NULL
, NULL
);
10432 remote_async_mask (int new_mask
)
10434 int curr_mask
= remote_async_mask_value
;
10436 remote_async_mask_value
= new_mask
;
10441 set_remote_cmd (char *args
, int from_tty
)
10443 help_list (remote_set_cmdlist
, "set remote ", -1, gdb_stdout
);
10447 show_remote_cmd (char *args
, int from_tty
)
10449 /* We can't just use cmd_show_list here, because we want to skip
10450 the redundant "show remote Z-packet" and the legacy aliases. */
10451 struct cleanup
*showlist_chain
;
10452 struct cmd_list_element
*list
= remote_show_cmdlist
;
10454 showlist_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "showlist");
10455 for (; list
!= NULL
; list
= list
->next
)
10456 if (strcmp (list
->name
, "Z-packet") == 0)
10458 else if (list
->type
== not_set_cmd
)
10459 /* Alias commands are exactly like the original, except they
10460 don't have the normal type. */
10464 struct cleanup
*option_chain
10465 = make_cleanup_ui_out_tuple_begin_end (uiout
, "option");
10467 ui_out_field_string (uiout
, "name", list
->name
);
10468 ui_out_text (uiout
, ": ");
10469 if (list
->type
== show_cmd
)
10470 do_setshow_command ((char *) NULL
, from_tty
, list
);
10472 cmd_func (list
, NULL
, from_tty
);
10473 /* Close the tuple. */
10474 do_cleanups (option_chain
);
10477 /* Close the tuple. */
10478 do_cleanups (showlist_chain
);
10482 /* Function to be called whenever a new objfile (shlib) is detected. */
10484 remote_new_objfile (struct objfile
*objfile
)
10486 if (remote_desc
!= 0) /* Have a remote connection. */
10487 remote_check_symbols (objfile
);
10490 /* Pull all the tracepoints defined on the target and create local
10491 data structures representing them. We don't want to create real
10492 tracepoints yet, we don't want to mess up the user's existing
10496 remote_upload_tracepoints (struct uploaded_tp
**utpp
)
10498 struct remote_state
*rs
= get_remote_state ();
10501 /* Ask for a first packet of tracepoint definition. */
10503 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10505 while (*p
&& *p
!= 'l')
10507 parse_tracepoint_definition (p
, utpp
);
10508 /* Ask for another packet of tracepoint definition. */
10510 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10517 remote_upload_trace_state_variables (struct uploaded_tsv
**utsvp
)
10519 struct remote_state
*rs
= get_remote_state ();
10522 /* Ask for a first packet of variable definition. */
10524 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10526 while (*p
&& *p
!= 'l')
10528 parse_tsv_definition (p
, utsvp
);
10529 /* Ask for another packet of variable definition. */
10531 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10538 _initialize_remote (void)
10540 struct remote_state
*rs
;
10541 struct cmd_list_element
*cmd
;
10544 /* architecture specific data */
10545 remote_gdbarch_data_handle
=
10546 gdbarch_data_register_post_init (init_remote_state
);
10547 remote_g_packet_data_handle
=
10548 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
10550 /* Initialize the per-target state. At the moment there is only one
10551 of these, not one per target. Only one target is active at a
10552 time. The default buffer size is unimportant; it will be expanded
10553 whenever a larger buffer is needed. */
10554 rs
= get_remote_state_raw ();
10555 rs
->buf_size
= 400;
10556 rs
->buf
= xmalloc (rs
->buf_size
);
10558 init_remote_ops ();
10559 add_target (&remote_ops
);
10561 init_extended_remote_ops ();
10562 add_target (&extended_remote_ops
);
10564 /* Hook into new objfile notification. */
10565 observer_attach_new_objfile (remote_new_objfile
);
10567 /* Set up signal handlers. */
10568 sigint_remote_token
=
10569 create_async_signal_handler (async_remote_interrupt
, NULL
);
10570 sigint_remote_twice_token
=
10571 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
10574 init_remote_threadtests ();
10577 /* set/show remote ... */
10579 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
10580 Remote protocol specific variables\n\
10581 Configure various remote-protocol specific variables such as\n\
10582 the packets being used"),
10583 &remote_set_cmdlist
, "set remote ",
10584 0 /* allow-unknown */, &setlist
);
10585 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
10586 Remote protocol specific variables\n\
10587 Configure various remote-protocol specific variables such as\n\
10588 the packets being used"),
10589 &remote_show_cmdlist
, "show remote ",
10590 0 /* allow-unknown */, &showlist
);
10592 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
10593 Compare section data on target to the exec file.\n\
10594 Argument is a single section name (default: all loaded sections)."),
10597 add_cmd ("packet", class_maintenance
, packet_command
, _("\
10598 Send an arbitrary packet to a remote target.\n\
10599 maintenance packet TEXT\n\
10600 If GDB is talking to an inferior via the GDB serial protocol, then\n\
10601 this command sends the string TEXT to the inferior, and displays the\n\
10602 response packet. GDB supplies the initial `$' character, and the\n\
10603 terminating `#' character and checksum."),
10606 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
10607 Set whether to send break if interrupted."), _("\
10608 Show whether to send break if interrupted."), _("\
10609 If set, a break, instead of a cntrl-c, is sent to the remote target."),
10610 set_remotebreak
, show_remotebreak
,
10611 &setlist
, &showlist
);
10612 cmd_name
= "remotebreak";
10613 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
10614 deprecate_cmd (cmd
, "set remote interrupt-sequence");
10615 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
10616 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
10617 deprecate_cmd (cmd
, "show remote interrupt-sequence");
10619 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
10620 interrupt_sequence_modes
, &interrupt_sequence_mode
,
10622 Set interrupt sequence to remote target."), _("\
10623 Show interrupt sequence to remote target."), _("\
10624 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
10625 NULL
, show_interrupt_sequence
,
10626 &remote_set_cmdlist
,
10627 &remote_show_cmdlist
);
10629 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
10630 &interrupt_on_connect
, _("\
10631 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
10632 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
10633 If set, interrupt sequence is sent to remote target."),
10635 &remote_set_cmdlist
, &remote_show_cmdlist
);
10637 /* Install commands for configuring memory read/write packets. */
10639 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
10640 Set the maximum number of bytes per memory write packet (deprecated)."),
10642 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
10643 Show the maximum number of bytes per memory write packet (deprecated)."),
10645 add_cmd ("memory-write-packet-size", no_class
,
10646 set_memory_write_packet_size
, _("\
10647 Set the maximum number of bytes per memory-write packet.\n\
10648 Specify the number of bytes in a packet or 0 (zero) for the\n\
10649 default packet size. The actual limit is further reduced\n\
10650 dependent on the target. Specify ``fixed'' to disable the\n\
10651 further restriction and ``limit'' to enable that restriction."),
10652 &remote_set_cmdlist
);
10653 add_cmd ("memory-read-packet-size", no_class
,
10654 set_memory_read_packet_size
, _("\
10655 Set the maximum number of bytes per memory-read packet.\n\
10656 Specify the number of bytes in a packet or 0 (zero) for the\n\
10657 default packet size. The actual limit is further reduced\n\
10658 dependent on the target. Specify ``fixed'' to disable the\n\
10659 further restriction and ``limit'' to enable that restriction."),
10660 &remote_set_cmdlist
);
10661 add_cmd ("memory-write-packet-size", no_class
,
10662 show_memory_write_packet_size
,
10663 _("Show the maximum number of bytes per memory-write packet."),
10664 &remote_show_cmdlist
);
10665 add_cmd ("memory-read-packet-size", no_class
,
10666 show_memory_read_packet_size
,
10667 _("Show the maximum number of bytes per memory-read packet."),
10668 &remote_show_cmdlist
);
10670 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
10671 &remote_hw_watchpoint_limit
, _("\
10672 Set the maximum number of target hardware watchpoints."), _("\
10673 Show the maximum number of target hardware watchpoints."), _("\
10674 Specify a negative limit for unlimited."),
10675 NULL
, NULL
, /* FIXME: i18n: The maximum
10676 number of target hardware
10677 watchpoints is %s. */
10678 &remote_set_cmdlist
, &remote_show_cmdlist
);
10679 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
10680 &remote_hw_breakpoint_limit
, _("\
10681 Set the maximum number of target hardware breakpoints."), _("\
10682 Show the maximum number of target hardware breakpoints."), _("\
10683 Specify a negative limit for unlimited."),
10684 NULL
, NULL
, /* FIXME: i18n: The maximum
10685 number of target hardware
10686 breakpoints is %s. */
10687 &remote_set_cmdlist
, &remote_show_cmdlist
);
10689 add_setshow_integer_cmd ("remoteaddresssize", class_obscure
,
10690 &remote_address_size
, _("\
10691 Set the maximum size of the address (in bits) in a memory packet."), _("\
10692 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
10694 NULL
, /* FIXME: i18n: */
10695 &setlist
, &showlist
);
10697 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
10698 "X", "binary-download", 1);
10700 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
10701 "vCont", "verbose-resume", 0);
10703 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
10704 "QPassSignals", "pass-signals", 0);
10706 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
10707 "qSymbol", "symbol-lookup", 0);
10709 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
10710 "P", "set-register", 1);
10712 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
10713 "p", "fetch-register", 1);
10715 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
10716 "Z0", "software-breakpoint", 0);
10718 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
10719 "Z1", "hardware-breakpoint", 0);
10721 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
10722 "Z2", "write-watchpoint", 0);
10724 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
10725 "Z3", "read-watchpoint", 0);
10727 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
10728 "Z4", "access-watchpoint", 0);
10730 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
10731 "qXfer:auxv:read", "read-aux-vector", 0);
10733 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
10734 "qXfer:features:read", "target-features", 0);
10736 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
10737 "qXfer:libraries:read", "library-info", 0);
10739 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
10740 "qXfer:memory-map:read", "memory-map", 0);
10742 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
10743 "qXfer:spu:read", "read-spu-object", 0);
10745 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
10746 "qXfer:spu:write", "write-spu-object", 0);
10748 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
10749 "qXfer:osdata:read", "osdata", 0);
10751 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
10752 "qXfer:threads:read", "threads", 0);
10754 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
10755 "qXfer:siginfo:read", "read-siginfo-object", 0);
10757 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
10758 "qXfer:siginfo:write", "write-siginfo-object", 0);
10760 add_packet_config_cmd
10761 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
10762 "qXfer:trace-frame-info:read", "traceframe-info", 0);
10764 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
10765 "qGetTLSAddr", "get-thread-local-storage-address",
10768 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
10769 "qGetTIBAddr", "get-thread-information-block-address",
10772 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
10773 "bc", "reverse-continue", 0);
10775 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
10776 "bs", "reverse-step", 0);
10778 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
10779 "qSupported", "supported-packets", 0);
10781 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
10782 "qSearch:memory", "search-memory", 0);
10784 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
10785 "vFile:open", "hostio-open", 0);
10787 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
10788 "vFile:pread", "hostio-pread", 0);
10790 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
10791 "vFile:pwrite", "hostio-pwrite", 0);
10793 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
10794 "vFile:close", "hostio-close", 0);
10796 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
10797 "vFile:unlink", "hostio-unlink", 0);
10799 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
10800 "vAttach", "attach", 0);
10802 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
10805 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
10806 "QStartNoAckMode", "noack", 0);
10808 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
10809 "vKill", "kill", 0);
10811 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
10812 "qAttached", "query-attached", 0);
10814 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
10815 "ConditionalTracepoints",
10816 "conditional-tracepoints", 0);
10817 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
10818 "FastTracepoints", "fast-tracepoints", 0);
10820 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
10821 "TracepointSource", "TracepointSource", 0);
10823 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
10824 "QAllow", "allow", 0);
10826 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
10827 "StaticTracepoints", "static-tracepoints", 0);
10829 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
10830 "qXfer:statictrace:read", "read-sdata-object", 0);
10832 /* Keep the old ``set remote Z-packet ...'' working. Each individual
10833 Z sub-packet has its own set and show commands, but users may
10834 have sets to this variable in their .gdbinit files (or in their
10836 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
10837 &remote_Z_packet_detect
, _("\
10838 Set use of remote protocol `Z' packets"), _("\
10839 Show use of remote protocol `Z' packets "), _("\
10840 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
10842 set_remote_protocol_Z_packet_cmd
,
10843 show_remote_protocol_Z_packet_cmd
,
10844 /* FIXME: i18n: Use of remote protocol
10845 `Z' packets is %s. */
10846 &remote_set_cmdlist
, &remote_show_cmdlist
);
10848 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
10849 Manipulate files on the remote system\n\
10850 Transfer files to and from the remote target system."),
10851 &remote_cmdlist
, "remote ",
10852 0 /* allow-unknown */, &cmdlist
);
10854 add_cmd ("put", class_files
, remote_put_command
,
10855 _("Copy a local file to the remote system."),
10858 add_cmd ("get", class_files
, remote_get_command
,
10859 _("Copy a remote file to the local system."),
10862 add_cmd ("delete", class_files
, remote_delete_command
,
10863 _("Delete a remote file."),
10866 remote_exec_file
= xstrdup ("");
10867 add_setshow_string_noescape_cmd ("exec-file", class_files
,
10868 &remote_exec_file
, _("\
10869 Set the remote pathname for \"run\""), _("\
10870 Show the remote pathname for \"run\""), NULL
, NULL
, NULL
,
10871 &remote_set_cmdlist
, &remote_show_cmdlist
);
10873 /* Eventually initialize fileio. See fileio.c */
10874 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
10876 /* Take advantage of the fact that the LWP field is not used, to tag
10877 special ptids with it set to != 0. */
10878 magic_null_ptid
= ptid_build (42000, 1, -1);
10879 not_sent_ptid
= ptid_build (42000, 1, -2);
10880 any_thread_ptid
= ptid_build (42000, 1, 0);
10882 target_buf_size
= 2048;
10883 target_buf
= xmalloc (target_buf_size
);