1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
4 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
5 2010 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 /* See the GDB User Guide for details of the GDB remote protocol. */
25 #include "gdb_string.h"
31 #include "exceptions.h"
33 /*#include "terminal.h" */
36 #include "gdb-stabs.h"
37 #include "gdbthread.h"
41 #include "gdb_assert.h"
44 #include "cli/cli-decode.h"
45 #include "cli/cli-setshow.h"
46 #include "target-descriptions.h"
51 #include "event-loop.h"
52 #include "event-top.h"
58 #include "gdbcore.h" /* for exec_bfd */
60 #include "remote-fileio.h"
61 #include "gdb/fileio.h"
63 #include "xml-support.h"
65 #include "memory-map.h"
67 #include "tracepoint.h"
71 /* temp hacks for tracepoint encoding migration */
72 static char *target_buf;
73 static long target_buf_size;
75 encode_actions (struct breakpoint *t, struct bp_location *tloc,
76 char ***tdp_actions, char ***stepping_actions);
78 /* The size to align memory write packets, when practical. The protocol
79 does not guarantee any alignment, and gdb will generate short
80 writes and unaligned writes, but even as a best-effort attempt this
81 can improve bulk transfers. For instance, if a write is misaligned
82 relative to the target's data bus, the stub may need to make an extra
83 round trip fetching data from the target. This doesn't make a
84 huge difference, but it's easy to do, so we try to be helpful.
86 The alignment chosen is arbitrary; usually data bus width is
87 important here, not the possibly larger cache line size. */
88 enum { REMOTE_ALIGN_WRITES = 16 };
90 /* Prototypes for local functions. */
91 static void cleanup_sigint_signal_handler (void *dummy);
92 static void initialize_sigint_signal_handler (void);
93 static int getpkt_sane (char **buf, long *sizeof_buf, int forever);
94 static int getpkt_or_notif_sane (char **buf, long *sizeof_buf,
97 static void handle_remote_sigint (int);
98 static void handle_remote_sigint_twice (int);
99 static void async_remote_interrupt (gdb_client_data);
100 void async_remote_interrupt_twice (gdb_client_data);
102 static void remote_files_info (struct target_ops *ignore);
104 static void remote_prepare_to_store (struct regcache *regcache);
106 static void remote_open (char *name, int from_tty);
108 static void extended_remote_open (char *name, int from_tty);
110 static void remote_open_1 (char *, int, struct target_ops *, int extended_p);
112 static void remote_close (int quitting);
114 static void remote_mourn (struct target_ops *ops);
116 static void extended_remote_restart (void);
118 static void extended_remote_mourn (struct target_ops *);
120 static void remote_mourn_1 (struct target_ops *);
122 static void remote_send (char **buf, long *sizeof_buf_p);
124 static int readchar (int timeout);
126 static void remote_kill (struct target_ops *ops);
128 static int tohex (int nib);
130 static int remote_can_async_p (void);
132 static int remote_is_async_p (void);
134 static void remote_async (void (*callback) (enum inferior_event_type event_type,
135 void *context), void *context);
137 static int remote_async_mask (int new_mask);
139 static void remote_detach (struct target_ops *ops, char *args, int from_tty);
141 static void remote_interrupt (int signo);
143 static void remote_interrupt_twice (int signo);
145 static void interrupt_query (void);
147 static void set_general_thread (struct ptid ptid);
148 static void set_continue_thread (struct ptid ptid);
150 static void get_offsets (void);
152 static void skip_frame (void);
154 static long read_frame (char **buf_p, long *sizeof_buf);
156 static int hexnumlen (ULONGEST num);
158 static void init_remote_ops (void);
160 static void init_extended_remote_ops (void);
162 static void remote_stop (ptid_t);
164 static int ishex (int ch, int *val);
166 static int stubhex (int ch);
168 static int hexnumstr (char *, ULONGEST);
170 static int hexnumnstr (char *, ULONGEST, int);
172 static CORE_ADDR remote_address_masked (CORE_ADDR);
174 static void print_packet (char *);
176 static unsigned long crc32 (unsigned char *, int, unsigned int);
178 static void compare_sections_command (char *, int);
180 static void packet_command (char *, int);
182 static int stub_unpack_int (char *buff, int fieldlength);
184 static ptid_t remote_current_thread (ptid_t oldptid);
186 static void remote_find_new_threads (void);
188 static void record_currthread (ptid_t currthread);
190 static int fromhex (int a);
192 extern int hex2bin (const char *hex, gdb_byte *bin, int count);
194 extern int bin2hex (const gdb_byte *bin, char *hex, int count);
196 static int putpkt_binary (char *buf, int cnt);
198 static void check_binary_download (CORE_ADDR addr);
200 struct packet_config;
202 static void show_packet_config_cmd (struct packet_config *config);
204 static void update_packet_config (struct packet_config *config);
206 static void set_remote_protocol_packet_cmd (char *args, int from_tty,
207 struct cmd_list_element *c);
209 static void show_remote_protocol_packet_cmd (struct ui_file *file,
211 struct cmd_list_element *c,
214 static char *write_ptid (char *buf, const char *endbuf, ptid_t ptid);
215 static ptid_t read_ptid (char *buf, char **obuf);
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 /* The non-stop remote protocol provisions for one pending stop reply.
248 This is where we keep it until it is acknowledged. */
250 static struct stop_reply *pending_stop_reply = NULL;
254 static struct cmd_list_element *remote_cmdlist;
256 /* For "set remote" and "show remote". */
258 static struct cmd_list_element *remote_set_cmdlist;
259 static struct cmd_list_element *remote_show_cmdlist;
261 /* Description of the remote protocol state for the currently
262 connected target. This is per-target state, and independent of the
263 selected architecture. */
267 /* A buffer to use for incoming packets, and its current size. The
268 buffer is grown dynamically for larger incoming packets.
269 Outgoing packets may also be constructed in this buffer.
270 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
271 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
276 /* If we negotiated packet size explicitly (and thus can bypass
277 heuristics for the largest packet size that will not overflow
278 a buffer in the stub), this will be set to that packet size.
279 Otherwise zero, meaning to use the guessed size. */
280 long explicit_packet_size;
282 /* remote_wait is normally called when the target is running and
283 waits for a stop reply packet. But sometimes we need to call it
284 when the target is already stopped. We can send a "?" packet
285 and have remote_wait read the response. Or, if we already have
286 the response, we can stash it in BUF and tell remote_wait to
287 skip calling getpkt. This flag is set when BUF contains a
288 stop reply packet and the target is not waiting. */
289 int cached_wait_status;
291 /* True, if in no ack mode. That is, neither GDB nor the stub will
292 expect acks from each other. The connection is assumed to be
296 /* True if we're connected in extended remote mode. */
299 /* True if the stub reported support for multi-process
301 int multi_process_aware;
303 /* True if we resumed the target and we're waiting for the target to
304 stop. In the mean time, we can't start another command/query.
305 The remote server wouldn't be ready to process it, so we'd
306 timeout waiting for a reply that would never come and eventually
307 we'd close the connection. This can happen in asynchronous mode
308 because we allow GDB commands while the target is running. */
309 int waiting_for_stop_reply;
311 /* True if the stub reports support for non-stop mode. */
314 /* True if the stub reports support for vCont;t. */
317 /* True if the stub reports support for conditional tracepoints. */
318 int cond_tracepoints;
320 /* True if the stub reports support for fast tracepoints. */
321 int fast_tracepoints;
323 /* True if the stub can continue running a trace while GDB is
325 int disconnected_tracing;
327 /* Nonzero if the user has pressed Ctrl-C, but the target hasn't
328 responded to that. */
332 /* Private data that we'll store in (struct thread_info)->private. */
333 struct private_thread_info
340 free_private_thread_info (struct private_thread_info *info)
346 /* Returns true if the multi-process extensions are in effect. */
348 remote_multi_process_p (struct remote_state *rs)
350 return rs->extended && rs->multi_process_aware;
353 /* This data could be associated with a target, but we do not always
354 have access to the current target when we need it, so for now it is
355 static. This will be fine for as long as only one target is in use
357 static struct remote_state remote_state;
359 static struct remote_state *
360 get_remote_state_raw (void)
362 return &remote_state;
365 /* Description of the remote protocol for a given architecture. */
369 long offset; /* Offset into G packet. */
370 long regnum; /* GDB's internal register number. */
371 LONGEST pnum; /* Remote protocol register number. */
372 int in_g_packet; /* Always part of G packet. */
373 /* long size in bytes; == register_size (target_gdbarch, regnum);
375 /* char *name; == gdbarch_register_name (target_gdbarch, regnum);
379 struct remote_arch_state
381 /* Description of the remote protocol registers. */
382 long sizeof_g_packet;
384 /* Description of the remote protocol registers indexed by REGNUM
385 (making an array gdbarch_num_regs in size). */
386 struct packet_reg *regs;
388 /* This is the size (in chars) of the first response to the ``g''
389 packet. It is used as a heuristic when determining the maximum
390 size of memory-read and memory-write packets. A target will
391 typically only reserve a buffer large enough to hold the ``g''
392 packet. The size does not include packet overhead (headers and
394 long actual_register_packet_size;
396 /* This is the maximum size (in chars) of a non read/write packet.
397 It is also used as a cap on the size of read/write packets. */
398 long remote_packet_size;
401 long sizeof_pkt = 2000;
403 /* Utility: generate error from an incoming stub packet. */
405 trace_error (char *buf)
408 return; /* not an error msg */
411 case '1': /* malformed packet error */
412 if (*++buf == '0') /* general case: */
413 error (_("remote.c: error in outgoing packet."));
415 error (_("remote.c: error in outgoing packet at field #%ld."),
416 strtol (buf, NULL, 16));
418 error (_("trace API error 0x%s."), ++buf);
420 error (_("Target returns error code '%s'."), buf);
424 /* Utility: wait for reply from stub, while accepting "O" packets. */
426 remote_get_noisy_reply (char **buf_p,
429 do /* Loop on reply from remote stub. */
432 QUIT; /* allow user to bail out with ^C */
433 getpkt (buf_p, sizeof_buf, 0);
436 error (_("Target does not support this command."));
437 else if (buf[0] == 'E')
439 else if (buf[0] == 'O' &&
441 remote_console_output (buf + 1); /* 'O' message from stub */
443 return buf; /* here's the actual reply */
448 /* Handle for retreving the remote protocol data from gdbarch. */
449 static struct gdbarch_data *remote_gdbarch_data_handle;
451 static struct remote_arch_state *
452 get_remote_arch_state (void)
454 return gdbarch_data (target_gdbarch, remote_gdbarch_data_handle);
457 /* Fetch the global remote target state. */
459 static struct remote_state *
460 get_remote_state (void)
462 /* Make sure that the remote architecture state has been
463 initialized, because doing so might reallocate rs->buf. Any
464 function which calls getpkt also needs to be mindful of changes
465 to rs->buf, but this call limits the number of places which run
467 get_remote_arch_state ();
469 return get_remote_state_raw ();
473 compare_pnums (const void *lhs_, const void *rhs_)
475 const struct packet_reg * const *lhs = lhs_;
476 const struct packet_reg * const *rhs = rhs_;
478 if ((*lhs)->pnum < (*rhs)->pnum)
480 else if ((*lhs)->pnum == (*rhs)->pnum)
487 init_remote_state (struct gdbarch *gdbarch)
489 int regnum, num_remote_regs, offset;
490 struct remote_state *rs = get_remote_state_raw ();
491 struct remote_arch_state *rsa;
492 struct packet_reg **remote_regs;
494 rsa = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_arch_state);
496 /* Use the architecture to build a regnum<->pnum table, which will be
497 1:1 unless a feature set specifies otherwise. */
498 rsa->regs = GDBARCH_OBSTACK_CALLOC (gdbarch,
499 gdbarch_num_regs (gdbarch),
501 for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++)
503 struct packet_reg *r = &rsa->regs[regnum];
505 if (register_size (gdbarch, regnum) == 0)
506 /* Do not try to fetch zero-sized (placeholder) registers. */
509 r->pnum = gdbarch_remote_register_number (gdbarch, regnum);
514 /* Define the g/G packet format as the contents of each register
515 with a remote protocol number, in order of ascending protocol
518 remote_regs = alloca (gdbarch_num_regs (gdbarch)
519 * sizeof (struct packet_reg *));
520 for (num_remote_regs = 0, regnum = 0;
521 regnum < gdbarch_num_regs (gdbarch);
523 if (rsa->regs[regnum].pnum != -1)
524 remote_regs[num_remote_regs++] = &rsa->regs[regnum];
526 qsort (remote_regs, num_remote_regs, sizeof (struct packet_reg *),
529 for (regnum = 0, offset = 0; regnum < num_remote_regs; regnum++)
531 remote_regs[regnum]->in_g_packet = 1;
532 remote_regs[regnum]->offset = offset;
533 offset += register_size (gdbarch, remote_regs[regnum]->regnum);
536 /* Record the maximum possible size of the g packet - it may turn out
538 rsa->sizeof_g_packet = offset;
540 /* Default maximum number of characters in a packet body. Many
541 remote stubs have a hardwired buffer size of 400 bytes
542 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
543 as the maximum packet-size to ensure that the packet and an extra
544 NUL character can always fit in the buffer. This stops GDB
545 trashing stubs that try to squeeze an extra NUL into what is
546 already a full buffer (As of 1999-12-04 that was most stubs). */
547 rsa->remote_packet_size = 400 - 1;
549 /* This one is filled in when a ``g'' packet is received. */
550 rsa->actual_register_packet_size = 0;
552 /* Should rsa->sizeof_g_packet needs more space than the
553 default, adjust the size accordingly. Remember that each byte is
554 encoded as two characters. 32 is the overhead for the packet
555 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
556 (``$NN:G...#NN'') is a better guess, the below has been padded a
558 if (rsa->sizeof_g_packet > ((rsa->remote_packet_size - 32) / 2))
559 rsa->remote_packet_size = (rsa->sizeof_g_packet * 2 + 32);
561 /* Make sure that the packet buffer is plenty big enough for
562 this architecture. */
563 if (rs->buf_size < rsa->remote_packet_size)
565 rs->buf_size = 2 * rsa->remote_packet_size;
566 rs->buf = xrealloc (rs->buf, rs->buf_size);
572 /* Return the current allowed size of a remote packet. This is
573 inferred from the current architecture, and should be used to
574 limit the length of outgoing packets. */
576 get_remote_packet_size (void)
578 struct remote_state *rs = get_remote_state ();
579 struct remote_arch_state *rsa = get_remote_arch_state ();
581 if (rs->explicit_packet_size)
582 return rs->explicit_packet_size;
584 return rsa->remote_packet_size;
587 static struct packet_reg *
588 packet_reg_from_regnum (struct remote_arch_state *rsa, long regnum)
590 if (regnum < 0 && regnum >= gdbarch_num_regs (target_gdbarch))
594 struct packet_reg *r = &rsa->regs[regnum];
595 gdb_assert (r->regnum == regnum);
600 static struct packet_reg *
601 packet_reg_from_pnum (struct remote_arch_state *rsa, LONGEST pnum)
604 for (i = 0; i < gdbarch_num_regs (target_gdbarch); i++)
606 struct packet_reg *r = &rsa->regs[i];
613 /* FIXME: graces/2002-08-08: These variables should eventually be
614 bound to an instance of the target object (as in gdbarch-tdep()),
615 when such a thing exists. */
617 /* This is set to the data address of the access causing the target
618 to stop for a watchpoint. */
619 static CORE_ADDR remote_watch_data_address;
621 /* This is non-zero if target stopped for a watchpoint. */
622 static int remote_stopped_by_watchpoint_p;
624 static struct target_ops remote_ops;
626 static struct target_ops extended_remote_ops;
628 static int remote_async_mask_value = 1;
630 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
631 ``forever'' still use the normal timeout mechanism. This is
632 currently used by the ASYNC code to guarentee that target reads
633 during the initial connect always time-out. Once getpkt has been
634 modified to return a timeout indication and, in turn
635 remote_wait()/wait_for_inferior() have gained a timeout parameter
637 static int wait_forever_enabled_p = 1;
639 /* Allow the user to specify what sequence to send to the remote
640 when he requests a program interruption: Although ^C is usually
641 what remote systems expect (this is the default, here), it is
642 sometimes preferable to send a break. On other systems such
643 as the Linux kernel, a break followed by g, which is Magic SysRq g
644 is required in order to interrupt the execution. */
645 const char interrupt_sequence_control_c[] = "Ctrl-C";
646 const char interrupt_sequence_break[] = "BREAK";
647 const char interrupt_sequence_break_g[] = "BREAK-g";
648 static const char *interrupt_sequence_modes[] =
650 interrupt_sequence_control_c,
651 interrupt_sequence_break,
652 interrupt_sequence_break_g,
655 static const char *interrupt_sequence_mode = interrupt_sequence_control_c;
658 show_interrupt_sequence (struct ui_file *file, int from_tty,
659 struct cmd_list_element *c,
662 if (interrupt_sequence_mode == interrupt_sequence_control_c)
663 fprintf_filtered (file,
664 _("Send the ASCII ETX character (Ctrl-c) "
665 "to the remote target to interrupt the "
666 "execution of the program.\n"));
667 else if (interrupt_sequence_mode == interrupt_sequence_break)
668 fprintf_filtered (file,
669 _("send a break signal to the remote target "
670 "to interrupt the execution of the program.\n"));
671 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
672 fprintf_filtered (file,
673 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
674 "the remote target to interrupt the execution "
675 "of Linux kernel.\n"));
677 internal_error (__FILE__, __LINE__,
678 _("Invalid value for interrupt_sequence_mode: %s."),
679 interrupt_sequence_mode);
682 /* This boolean variable specifies whether interrupt_sequence is sent
683 to the remote target when gdb connects to it.
684 This is mostly needed when you debug the Linux kernel: The Linux kernel
685 expects BREAK g which is Magic SysRq g for connecting gdb. */
686 static int interrupt_on_connect = 0;
688 /* This variable is used to implement the "set/show remotebreak" commands.
689 Since these commands are now deprecated in favor of "set/show remote
690 interrupt-sequence", it no longer has any effect on the code. */
691 static int remote_break;
694 set_remotebreak (char *args, int from_tty, struct cmd_list_element *c)
697 interrupt_sequence_mode = interrupt_sequence_break;
699 interrupt_sequence_mode = interrupt_sequence_control_c;
703 show_remotebreak (struct ui_file *file, int from_tty,
704 struct cmd_list_element *c,
709 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
710 remote_open knows that we don't have a file open when the program
712 static struct serial *remote_desc = NULL;
714 /* This variable sets the number of bits in an address that are to be
715 sent in a memory ("M" or "m") packet. Normally, after stripping
716 leading zeros, the entire address would be sent. This variable
717 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
718 initial implementation of remote.c restricted the address sent in
719 memory packets to ``host::sizeof long'' bytes - (typically 32
720 bits). Consequently, for 64 bit targets, the upper 32 bits of an
721 address was never sent. Since fixing this bug may cause a break in
722 some remote targets this variable is principly provided to
723 facilitate backward compatibility. */
725 static int remote_address_size;
727 /* Temporary to track who currently owns the terminal. See
728 remote_terminal_* for more details. */
730 static int remote_async_terminal_ours_p;
732 /* The executable file to use for "run" on the remote side. */
734 static char *remote_exec_file = "";
737 /* User configurable variables for the number of characters in a
738 memory read/write packet. MIN (rsa->remote_packet_size,
739 rsa->sizeof_g_packet) is the default. Some targets need smaller
740 values (fifo overruns, et.al.) and some users need larger values
741 (speed up transfers). The variables ``preferred_*'' (the user
742 request), ``current_*'' (what was actually set) and ``forced_*''
743 (Positive - a soft limit, negative - a hard limit). */
745 struct memory_packet_config
752 /* Compute the current size of a read/write packet. Since this makes
753 use of ``actual_register_packet_size'' the computation is dynamic. */
756 get_memory_packet_size (struct memory_packet_config *config)
758 struct remote_state *rs = get_remote_state ();
759 struct remote_arch_state *rsa = get_remote_arch_state ();
761 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
762 law?) that some hosts don't cope very well with large alloca()
763 calls. Eventually the alloca() code will be replaced by calls to
764 xmalloc() and make_cleanups() allowing this restriction to either
765 be lifted or removed. */
766 #ifndef MAX_REMOTE_PACKET_SIZE
767 #define MAX_REMOTE_PACKET_SIZE 16384
769 /* NOTE: 20 ensures we can write at least one byte. */
770 #ifndef MIN_REMOTE_PACKET_SIZE
771 #define MIN_REMOTE_PACKET_SIZE 20
776 if (config->size <= 0)
777 what_they_get = MAX_REMOTE_PACKET_SIZE;
779 what_they_get = config->size;
783 what_they_get = get_remote_packet_size ();
784 /* Limit the packet to the size specified by the user. */
786 && what_they_get > config->size)
787 what_they_get = config->size;
789 /* Limit it to the size of the targets ``g'' response unless we have
790 permission from the stub to use a larger packet size. */
791 if (rs->explicit_packet_size == 0
792 && rsa->actual_register_packet_size > 0
793 && what_they_get > rsa->actual_register_packet_size)
794 what_they_get = rsa->actual_register_packet_size;
796 if (what_they_get > MAX_REMOTE_PACKET_SIZE)
797 what_they_get = MAX_REMOTE_PACKET_SIZE;
798 if (what_they_get < MIN_REMOTE_PACKET_SIZE)
799 what_they_get = MIN_REMOTE_PACKET_SIZE;
801 /* Make sure there is room in the global buffer for this packet
802 (including its trailing NUL byte). */
803 if (rs->buf_size < what_they_get + 1)
805 rs->buf_size = 2 * what_they_get;
806 rs->buf = xrealloc (rs->buf, 2 * what_they_get);
809 return what_they_get;
812 /* Update the size of a read/write packet. If they user wants
813 something really big then do a sanity check. */
816 set_memory_packet_size (char *args, struct memory_packet_config *config)
818 int fixed_p = config->fixed_p;
819 long size = config->size;
821 error (_("Argument required (integer, `fixed' or `limited')."));
822 else if (strcmp (args, "hard") == 0
823 || strcmp (args, "fixed") == 0)
825 else if (strcmp (args, "soft") == 0
826 || strcmp (args, "limit") == 0)
831 size = strtoul (args, &end, 0);
833 error (_("Invalid %s (bad syntax)."), config->name);
835 /* Instead of explicitly capping the size of a packet to
836 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
837 instead allowed to set the size to something arbitrarily
839 if (size > MAX_REMOTE_PACKET_SIZE)
840 error (_("Invalid %s (too large)."), config->name);
844 if (fixed_p && !config->fixed_p)
846 if (! query (_("The target may not be able to correctly handle a %s\n"
847 "of %ld bytes. Change the packet size? "),
849 error (_("Packet size not changed."));
851 /* Update the config. */
852 config->fixed_p = fixed_p;
857 show_memory_packet_size (struct memory_packet_config *config)
859 printf_filtered (_("The %s is %ld. "), config->name, config->size);
861 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
862 get_memory_packet_size (config));
864 printf_filtered (_("Packets are limited to %ld bytes.\n"),
865 get_memory_packet_size (config));
868 static struct memory_packet_config memory_write_packet_config =
870 "memory-write-packet-size",
874 set_memory_write_packet_size (char *args, int from_tty)
876 set_memory_packet_size (args, &memory_write_packet_config);
880 show_memory_write_packet_size (char *args, int from_tty)
882 show_memory_packet_size (&memory_write_packet_config);
886 get_memory_write_packet_size (void)
888 return get_memory_packet_size (&memory_write_packet_config);
891 static struct memory_packet_config memory_read_packet_config =
893 "memory-read-packet-size",
897 set_memory_read_packet_size (char *args, int from_tty)
899 set_memory_packet_size (args, &memory_read_packet_config);
903 show_memory_read_packet_size (char *args, int from_tty)
905 show_memory_packet_size (&memory_read_packet_config);
909 get_memory_read_packet_size (void)
911 long size = get_memory_packet_size (&memory_read_packet_config);
912 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
913 extra buffer size argument before the memory read size can be
914 increased beyond this. */
915 if (size > get_remote_packet_size ())
916 size = get_remote_packet_size ();
921 /* Generic configuration support for packets the stub optionally
922 supports. Allows the user to specify the use of the packet as well
923 as allowing GDB to auto-detect support in the remote stub. */
927 PACKET_SUPPORT_UNKNOWN = 0,
936 enum auto_boolean detect;
937 enum packet_support support;
940 /* Analyze a packet's return value and update the packet config
951 update_packet_config (struct packet_config *config)
953 switch (config->detect)
955 case AUTO_BOOLEAN_TRUE:
956 config->support = PACKET_ENABLE;
958 case AUTO_BOOLEAN_FALSE:
959 config->support = PACKET_DISABLE;
961 case AUTO_BOOLEAN_AUTO:
962 config->support = PACKET_SUPPORT_UNKNOWN;
968 show_packet_config_cmd (struct packet_config *config)
970 char *support = "internal-error";
971 switch (config->support)
977 support = "disabled";
979 case PACKET_SUPPORT_UNKNOWN:
983 switch (config->detect)
985 case AUTO_BOOLEAN_AUTO:
986 printf_filtered (_("Support for the `%s' packet is auto-detected, currently %s.\n"),
987 config->name, support);
989 case AUTO_BOOLEAN_TRUE:
990 case AUTO_BOOLEAN_FALSE:
991 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
992 config->name, support);
998 add_packet_config_cmd (struct packet_config *config, const char *name,
999 const char *title, int legacy)
1005 config->name = name;
1006 config->title = title;
1007 config->detect = AUTO_BOOLEAN_AUTO;
1008 config->support = PACKET_SUPPORT_UNKNOWN;
1009 set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1011 show_doc = xstrprintf ("Show current use of remote protocol `%s' (%s) packet",
1013 /* set/show TITLE-packet {auto,on,off} */
1014 cmd_name = xstrprintf ("%s-packet", title);
1015 add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
1016 &config->detect, set_doc, show_doc, NULL, /* help_doc */
1017 set_remote_protocol_packet_cmd,
1018 show_remote_protocol_packet_cmd,
1019 &remote_set_cmdlist, &remote_show_cmdlist);
1020 /* The command code copies the documentation strings. */
1023 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1027 legacy_name = xstrprintf ("%s-packet", name);
1028 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1029 &remote_set_cmdlist);
1030 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1031 &remote_show_cmdlist);
1035 static enum packet_result
1036 packet_check_result (const char *buf)
1040 /* The stub recognized the packet request. Check that the
1041 operation succeeded. */
1043 && isxdigit (buf[1]) && isxdigit (buf[2])
1045 /* "Enn" - definitly an error. */
1046 return PACKET_ERROR;
1048 /* Always treat "E." as an error. This will be used for
1049 more verbose error messages, such as E.memtypes. */
1050 if (buf[0] == 'E' && buf[1] == '.')
1051 return PACKET_ERROR;
1053 /* The packet may or may not be OK. Just assume it is. */
1057 /* The stub does not support the packet. */
1058 return PACKET_UNKNOWN;
1061 static enum packet_result
1062 packet_ok (const char *buf, struct packet_config *config)
1064 enum packet_result result;
1066 result = packet_check_result (buf);
1071 /* The stub recognized the packet request. */
1072 switch (config->support)
1074 case PACKET_SUPPORT_UNKNOWN:
1076 fprintf_unfiltered (gdb_stdlog,
1077 "Packet %s (%s) is supported\n",
1078 config->name, config->title);
1079 config->support = PACKET_ENABLE;
1081 case PACKET_DISABLE:
1082 internal_error (__FILE__, __LINE__,
1083 _("packet_ok: attempt to use a disabled packet"));
1089 case PACKET_UNKNOWN:
1090 /* The stub does not support the packet. */
1091 switch (config->support)
1094 if (config->detect == AUTO_BOOLEAN_AUTO)
1095 /* If the stub previously indicated that the packet was
1096 supported then there is a protocol error.. */
1097 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1098 config->name, config->title);
1100 /* The user set it wrong. */
1101 error (_("Enabled packet %s (%s) not recognized by stub"),
1102 config->name, config->title);
1104 case PACKET_SUPPORT_UNKNOWN:
1106 fprintf_unfiltered (gdb_stdlog,
1107 "Packet %s (%s) is NOT supported\n",
1108 config->name, config->title);
1109 config->support = PACKET_DISABLE;
1111 case PACKET_DISABLE:
1133 PACKET_vFile_pwrite,
1135 PACKET_vFile_unlink,
1137 PACKET_qXfer_features,
1138 PACKET_qXfer_libraries,
1139 PACKET_qXfer_memory_map,
1140 PACKET_qXfer_spu_read,
1141 PACKET_qXfer_spu_write,
1142 PACKET_qXfer_osdata,
1143 PACKET_qXfer_threads,
1146 PACKET_QPassSignals,
1147 PACKET_qSearch_memory,
1150 PACKET_QStartNoAckMode,
1152 PACKET_qXfer_siginfo_read,
1153 PACKET_qXfer_siginfo_write,
1155 PACKET_ConditionalTracepoints,
1156 PACKET_FastTracepoints,
1162 static struct packet_config remote_protocol_packets[PACKET_MAX];
1165 set_remote_protocol_packet_cmd (char *args, int from_tty,
1166 struct cmd_list_element *c)
1168 struct packet_config *packet;
1170 for (packet = remote_protocol_packets;
1171 packet < &remote_protocol_packets[PACKET_MAX];
1174 if (&packet->detect == c->var)
1176 update_packet_config (packet);
1180 internal_error (__FILE__, __LINE__, "Could not find config for %s",
1185 show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty,
1186 struct cmd_list_element *c,
1189 struct packet_config *packet;
1191 for (packet = remote_protocol_packets;
1192 packet < &remote_protocol_packets[PACKET_MAX];
1195 if (&packet->detect == c->var)
1197 show_packet_config_cmd (packet);
1201 internal_error (__FILE__, __LINE__, "Could not find config for %s",
1205 /* Should we try one of the 'Z' requests? */
1209 Z_PACKET_SOFTWARE_BP,
1210 Z_PACKET_HARDWARE_BP,
1217 /* For compatibility with older distributions. Provide a ``set remote
1218 Z-packet ...'' command that updates all the Z packet types. */
1220 static enum auto_boolean remote_Z_packet_detect;
1223 set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
1224 struct cmd_list_element *c)
1227 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1229 remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect;
1230 update_packet_config (&remote_protocol_packets[PACKET_Z0 + i]);
1235 show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty,
1236 struct cmd_list_element *c,
1240 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1242 show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]);
1246 /* Should we try the 'ThreadInfo' query packet?
1248 This variable (NOT available to the user: auto-detect only!)
1249 determines whether GDB will use the new, simpler "ThreadInfo"
1250 query or the older, more complex syntax for thread queries.
1251 This is an auto-detect variable (set to true at each connect,
1252 and set to false when the target fails to recognize it). */
1254 static int use_threadinfo_query;
1255 static int use_threadextra_query;
1257 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1258 static struct async_signal_handler *sigint_remote_twice_token;
1259 static struct async_signal_handler *sigint_remote_token;
1262 /* Asynchronous signal handle registered as event loop source for
1263 when we have pending events ready to be passed to the core. */
1265 static struct async_event_handler *remote_async_inferior_event_token;
1267 /* Asynchronous signal handle registered as event loop source for when
1268 the remote sent us a %Stop notification. The registered callback
1269 will do a vStopped sequence to pull the rest of the events out of
1270 the remote side into our event queue. */
1272 static struct async_event_handler *remote_async_get_pending_events_token;
1275 static ptid_t magic_null_ptid;
1276 static ptid_t not_sent_ptid;
1277 static ptid_t any_thread_ptid;
1279 /* These are the threads which we last sent to the remote system. The
1280 TID member will be -1 for all or -2 for not sent yet. */
1282 static ptid_t general_thread;
1283 static ptid_t continue_thread;
1285 /* Find out if the stub attached to PID (and hence GDB should offer to
1286 detach instead of killing it when bailing out). */
1289 remote_query_attached (int pid)
1291 struct remote_state *rs = get_remote_state ();
1293 if (remote_protocol_packets[PACKET_qAttached].support == PACKET_DISABLE)
1296 if (remote_multi_process_p (rs))
1297 sprintf (rs->buf, "qAttached:%x", pid);
1299 sprintf (rs->buf, "qAttached");
1302 getpkt (&rs->buf, &rs->buf_size, 0);
1304 switch (packet_ok (rs->buf,
1305 &remote_protocol_packets[PACKET_qAttached]))
1308 if (strcmp (rs->buf, "1") == 0)
1312 warning (_("Remote failure reply: %s"), rs->buf);
1314 case PACKET_UNKNOWN:
1321 /* Add PID to GDB's inferior table. Since we can be connected to a
1322 remote system before before knowing about any inferior, mark the
1323 target with execution when we find the first inferior. If ATTACHED
1324 is 1, then we had just attached to this inferior. If it is 0, then
1325 we just created this inferior. If it is -1, then try querying the
1326 remote stub to find out if it had attached to the inferior or
1329 static struct inferior *
1330 remote_add_inferior (int pid, int attached)
1332 struct inferior *inf;
1334 /* Check whether this process we're learning about is to be
1335 considered attached, or if is to be considered to have been
1336 spawned by the stub. */
1338 attached = remote_query_attached (pid);
1340 if (gdbarch_has_global_solist (target_gdbarch))
1342 /* If the target shares code across all inferiors, then every
1343 attach adds a new inferior. */
1344 inf = add_inferior (pid);
1346 /* ... and every inferior is bound to the same program space.
1347 However, each inferior may still have its own address
1349 inf->aspace = maybe_new_address_space ();
1350 inf->pspace = current_program_space;
1354 /* In the traditional debugging scenario, there's a 1-1 match
1355 between program/address spaces. We simply bind the inferior
1356 to the program space's address space. */
1357 inf = current_inferior ();
1358 inferior_appeared (inf, pid);
1361 inf->attach_flag = attached;
1366 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1367 according to RUNNING. */
1370 remote_add_thread (ptid_t ptid, int running)
1374 set_executing (ptid, running);
1375 set_running (ptid, running);
1378 /* Come here when we learn about a thread id from the remote target.
1379 It may be the first time we hear about such thread, so take the
1380 opportunity to add it to GDB's thread list. In case this is the
1381 first time we're noticing its corresponding inferior, add it to
1382 GDB's inferior list as well. */
1385 remote_notice_new_inferior (ptid_t currthread, int running)
1387 /* If this is a new thread, add it to GDB's thread list.
1388 If we leave it up to WFI to do this, bad things will happen. */
1390 if (in_thread_list (currthread) && is_exited (currthread))
1392 /* We're seeing an event on a thread id we knew had exited.
1393 This has to be a new thread reusing the old id. Add it. */
1394 remote_add_thread (currthread, running);
1398 if (!in_thread_list (currthread))
1400 struct inferior *inf = NULL;
1401 int pid = ptid_get_pid (currthread);
1403 if (ptid_is_pid (inferior_ptid)
1404 && pid == ptid_get_pid (inferior_ptid))
1406 /* inferior_ptid has no thread member yet. This can happen
1407 with the vAttach -> remote_wait,"TAAthread:" path if the
1408 stub doesn't support qC. This is the first stop reported
1409 after an attach, so this is the main thread. Update the
1410 ptid in the thread list. */
1411 if (in_thread_list (pid_to_ptid (pid)))
1412 thread_change_ptid (inferior_ptid, currthread);
1415 remote_add_thread (currthread, running);
1416 inferior_ptid = currthread;
1421 if (ptid_equal (magic_null_ptid, inferior_ptid))
1423 /* inferior_ptid is not set yet. This can happen with the
1424 vRun -> remote_wait,"TAAthread:" path if the stub
1425 doesn't support qC. This is the first stop reported
1426 after an attach, so this is the main thread. Update the
1427 ptid in the thread list. */
1428 thread_change_ptid (inferior_ptid, currthread);
1432 /* When connecting to a target remote, or to a target
1433 extended-remote which already was debugging an inferior, we
1434 may not know about it yet. Add it before adding its child
1435 thread, so notifications are emitted in a sensible order. */
1436 if (!in_inferior_list (ptid_get_pid (currthread)))
1437 inf = remote_add_inferior (ptid_get_pid (currthread), -1);
1439 /* This is really a new thread. Add it. */
1440 remote_add_thread (currthread, running);
1442 /* If we found a new inferior, let the common code do whatever
1443 it needs to with it (e.g., read shared libraries, insert
1446 notice_new_inferior (currthread, running, 0);
1450 /* Return the private thread data, creating it if necessary. */
1452 struct private_thread_info *
1453 demand_private_info (ptid_t ptid)
1455 struct thread_info *info = find_thread_ptid (ptid);
1461 info->private = xmalloc (sizeof (*(info->private)));
1462 info->private_dtor = free_private_thread_info;
1463 info->private->core = -1;
1464 info->private->extra = 0;
1467 return info->private;
1470 /* Call this function as a result of
1471 1) A halt indication (T packet) containing a thread id
1472 2) A direct query of currthread
1473 3) Successful execution of set thread
1477 record_currthread (ptid_t currthread)
1479 general_thread = currthread;
1482 static char *last_pass_packet;
1484 /* If 'QPassSignals' is supported, tell the remote stub what signals
1485 it can simply pass through to the inferior without reporting. */
1488 remote_pass_signals (void)
1490 if (remote_protocol_packets[PACKET_QPassSignals].support != PACKET_DISABLE)
1492 char *pass_packet, *p;
1493 int numsigs = (int) TARGET_SIGNAL_LAST;
1496 gdb_assert (numsigs < 256);
1497 for (i = 0; i < numsigs; i++)
1499 if (signal_stop_state (i) == 0
1500 && signal_print_state (i) == 0
1501 && signal_pass_state (i) == 1)
1504 pass_packet = xmalloc (count * 3 + strlen ("QPassSignals:") + 1);
1505 strcpy (pass_packet, "QPassSignals:");
1506 p = pass_packet + strlen (pass_packet);
1507 for (i = 0; i < numsigs; i++)
1509 if (signal_stop_state (i) == 0
1510 && signal_print_state (i) == 0
1511 && signal_pass_state (i) == 1)
1514 *p++ = tohex (i >> 4);
1515 *p++ = tohex (i & 15);
1524 if (!last_pass_packet || strcmp (last_pass_packet, pass_packet))
1526 struct remote_state *rs = get_remote_state ();
1527 char *buf = rs->buf;
1529 putpkt (pass_packet);
1530 getpkt (&rs->buf, &rs->buf_size, 0);
1531 packet_ok (buf, &remote_protocol_packets[PACKET_QPassSignals]);
1532 if (last_pass_packet)
1533 xfree (last_pass_packet);
1534 last_pass_packet = pass_packet;
1537 xfree (pass_packet);
1541 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
1542 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
1543 thread. If GEN is set, set the general thread, if not, then set
1544 the step/continue thread. */
1546 set_thread (struct ptid ptid, int gen)
1548 struct remote_state *rs = get_remote_state ();
1549 ptid_t state = gen ? general_thread : continue_thread;
1550 char *buf = rs->buf;
1551 char *endbuf = rs->buf + get_remote_packet_size ();
1553 if (ptid_equal (state, ptid))
1557 *buf++ = gen ? 'g' : 'c';
1558 if (ptid_equal (ptid, magic_null_ptid))
1559 xsnprintf (buf, endbuf - buf, "0");
1560 else if (ptid_equal (ptid, any_thread_ptid))
1561 xsnprintf (buf, endbuf - buf, "0");
1562 else if (ptid_equal (ptid, minus_one_ptid))
1563 xsnprintf (buf, endbuf - buf, "-1");
1565 write_ptid (buf, endbuf, ptid);
1567 getpkt (&rs->buf, &rs->buf_size, 0);
1569 general_thread = ptid;
1571 continue_thread = ptid;
1575 set_general_thread (struct ptid ptid)
1577 set_thread (ptid, 1);
1581 set_continue_thread (struct ptid ptid)
1583 set_thread (ptid, 0);
1586 /* Change the remote current process. Which thread within the process
1587 ends up selected isn't important, as long as it is the same process
1588 as what INFERIOR_PTID points to.
1590 This comes from that fact that there is no explicit notion of
1591 "selected process" in the protocol. The selected process for
1592 general operations is the process the selected general thread
1596 set_general_process (void)
1598 struct remote_state *rs = get_remote_state ();
1600 /* If the remote can't handle multiple processes, don't bother. */
1601 if (!remote_multi_process_p (rs))
1604 /* We only need to change the remote current thread if it's pointing
1605 at some other process. */
1606 if (ptid_get_pid (general_thread) != ptid_get_pid (inferior_ptid))
1607 set_general_thread (inferior_ptid);
1611 /* Return nonzero if the thread PTID is still alive on the remote
1615 remote_thread_alive (struct target_ops *ops, ptid_t ptid)
1617 struct remote_state *rs = get_remote_state ();
1620 if (ptid_equal (ptid, magic_null_ptid))
1621 /* The main thread is always alive. */
1624 if (ptid_get_pid (ptid) != 0 && ptid_get_tid (ptid) == 0)
1625 /* The main thread is always alive. This can happen after a
1626 vAttach, if the remote side doesn't support
1631 endp = rs->buf + get_remote_packet_size ();
1634 write_ptid (p, endp, ptid);
1637 getpkt (&rs->buf, &rs->buf_size, 0);
1638 return (rs->buf[0] == 'O' && rs->buf[1] == 'K');
1641 /* About these extended threadlist and threadinfo packets. They are
1642 variable length packets but, the fields within them are often fixed
1643 length. They are redundent enough to send over UDP as is the
1644 remote protocol in general. There is a matching unit test module
1647 #define OPAQUETHREADBYTES 8
1649 /* a 64 bit opaque identifier */
1650 typedef unsigned char threadref[OPAQUETHREADBYTES];
1652 /* WARNING: This threadref data structure comes from the remote O.S.,
1653 libstub protocol encoding, and remote.c. it is not particularly
1656 /* Right now, the internal structure is int. We want it to be bigger.
1660 typedef int gdb_threadref; /* Internal GDB thread reference. */
1662 /* gdb_ext_thread_info is an internal GDB data structure which is
1663 equivalent to the reply of the remote threadinfo packet. */
1665 struct gdb_ext_thread_info
1667 threadref threadid; /* External form of thread reference. */
1668 int active; /* Has state interesting to GDB?
1670 char display[256]; /* Brief state display, name,
1671 blocked/suspended. */
1672 char shortname[32]; /* To be used to name threads. */
1673 char more_display[256]; /* Long info, statistics, queue depth,
1677 /* The volume of remote transfers can be limited by submitting
1678 a mask containing bits specifying the desired information.
1679 Use a union of these values as the 'selection' parameter to
1680 get_thread_info. FIXME: Make these TAG names more thread specific.
1683 #define TAG_THREADID 1
1684 #define TAG_EXISTS 2
1685 #define TAG_DISPLAY 4
1686 #define TAG_THREADNAME 8
1687 #define TAG_MOREDISPLAY 16
1689 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1691 char *unpack_varlen_hex (char *buff, ULONGEST *result);
1693 static char *unpack_nibble (char *buf, int *val);
1695 static char *pack_nibble (char *buf, int nibble);
1697 static char *pack_hex_byte (char *pkt, int /* unsigned char */ byte);
1699 static char *unpack_byte (char *buf, int *value);
1701 static char *pack_int (char *buf, int value);
1703 static char *unpack_int (char *buf, int *value);
1705 static char *unpack_string (char *src, char *dest, int length);
1707 static char *pack_threadid (char *pkt, threadref *id);
1709 static char *unpack_threadid (char *inbuf, threadref *id);
1711 void int_to_threadref (threadref *id, int value);
1713 static int threadref_to_int (threadref *ref);
1715 static void copy_threadref (threadref *dest, threadref *src);
1717 static int threadmatch (threadref *dest, threadref *src);
1719 static char *pack_threadinfo_request (char *pkt, int mode,
1722 static int remote_unpack_thread_info_response (char *pkt,
1723 threadref *expectedref,
1724 struct gdb_ext_thread_info
1728 static int remote_get_threadinfo (threadref *threadid,
1729 int fieldset, /*TAG mask */
1730 struct gdb_ext_thread_info *info);
1732 static char *pack_threadlist_request (char *pkt, int startflag,
1734 threadref *nextthread);
1736 static int parse_threadlist_response (char *pkt,
1738 threadref *original_echo,
1739 threadref *resultlist,
1742 static int remote_get_threadlist (int startflag,
1743 threadref *nextthread,
1747 threadref *threadlist);
1749 typedef int (*rmt_thread_action) (threadref *ref, void *context);
1751 static int remote_threadlist_iterator (rmt_thread_action stepfunction,
1752 void *context, int looplimit);
1754 static int remote_newthread_step (threadref *ref, void *context);
1757 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
1758 buffer we're allowed to write to. Returns
1759 BUF+CHARACTERS_WRITTEN. */
1762 write_ptid (char *buf, const char *endbuf, ptid_t ptid)
1765 struct remote_state *rs = get_remote_state ();
1767 if (remote_multi_process_p (rs))
1769 pid = ptid_get_pid (ptid);
1771 buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid);
1773 buf += xsnprintf (buf, endbuf - buf, "p%x.", pid);
1775 tid = ptid_get_tid (ptid);
1777 buf += xsnprintf (buf, endbuf - buf, "-%x", -tid);
1779 buf += xsnprintf (buf, endbuf - buf, "%x", tid);
1784 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
1785 passed the last parsed char. Returns null_ptid on error. */
1788 read_ptid (char *buf, char **obuf)
1792 ULONGEST pid = 0, tid = 0;
1796 /* Multi-process ptid. */
1797 pp = unpack_varlen_hex (p + 1, &pid);
1799 error (_("invalid remote ptid: %s\n"), p);
1802 pp = unpack_varlen_hex (p + 1, &tid);
1805 return ptid_build (pid, 0, tid);
1808 /* No multi-process. Just a tid. */
1809 pp = unpack_varlen_hex (p, &tid);
1811 /* Since the stub is not sending a process id, then default to
1812 what's in inferior_ptid, unless it's null at this point. If so,
1813 then since there's no way to know the pid of the reported
1814 threads, use the magic number. */
1815 if (ptid_equal (inferior_ptid, null_ptid))
1816 pid = ptid_get_pid (magic_null_ptid);
1818 pid = ptid_get_pid (inferior_ptid);
1822 return ptid_build (pid, 0, tid);
1825 /* Encode 64 bits in 16 chars of hex. */
1827 static const char hexchars[] = "0123456789abcdef";
1830 ishex (int ch, int *val)
1832 if ((ch >= 'a') && (ch <= 'f'))
1834 *val = ch - 'a' + 10;
1837 if ((ch >= 'A') && (ch <= 'F'))
1839 *val = ch - 'A' + 10;
1842 if ((ch >= '0') && (ch <= '9'))
1853 if (ch >= 'a' && ch <= 'f')
1854 return ch - 'a' + 10;
1855 if (ch >= '0' && ch <= '9')
1857 if (ch >= 'A' && ch <= 'F')
1858 return ch - 'A' + 10;
1863 stub_unpack_int (char *buff, int fieldlength)
1870 nibble = stubhex (*buff++);
1874 retval = retval << 4;
1880 unpack_varlen_hex (char *buff, /* packet to parse */
1884 ULONGEST retval = 0;
1886 while (ishex (*buff, &nibble))
1889 retval = retval << 4;
1890 retval |= nibble & 0x0f;
1897 unpack_nibble (char *buf, int *val)
1899 *val = fromhex (*buf++);
1904 pack_nibble (char *buf, int nibble)
1906 *buf++ = hexchars[(nibble & 0x0f)];
1911 pack_hex_byte (char *pkt, int byte)
1913 *pkt++ = hexchars[(byte >> 4) & 0xf];
1914 *pkt++ = hexchars[(byte & 0xf)];
1919 unpack_byte (char *buf, int *value)
1921 *value = stub_unpack_int (buf, 2);
1926 pack_int (char *buf, int value)
1928 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
1929 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
1930 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
1931 buf = pack_hex_byte (buf, (value & 0xff));
1936 unpack_int (char *buf, int *value)
1938 *value = stub_unpack_int (buf, 8);
1942 #if 0 /* Currently unused, uncomment when needed. */
1943 static char *pack_string (char *pkt, char *string);
1946 pack_string (char *pkt, char *string)
1951 len = strlen (string);
1953 len = 200; /* Bigger than most GDB packets, junk??? */
1954 pkt = pack_hex_byte (pkt, len);
1958 if ((ch == '\0') || (ch == '#'))
1959 ch = '*'; /* Protect encapsulation. */
1964 #endif /* 0 (unused) */
1967 unpack_string (char *src, char *dest, int length)
1976 pack_threadid (char *pkt, threadref *id)
1979 unsigned char *altid;
1981 altid = (unsigned char *) id;
1982 limit = pkt + BUF_THREAD_ID_SIZE;
1984 pkt = pack_hex_byte (pkt, *altid++);
1990 unpack_threadid (char *inbuf, threadref *id)
1993 char *limit = inbuf + BUF_THREAD_ID_SIZE;
1996 altref = (char *) id;
1998 while (inbuf < limit)
2000 x = stubhex (*inbuf++);
2001 y = stubhex (*inbuf++);
2002 *altref++ = (x << 4) | y;
2007 /* Externally, threadrefs are 64 bits but internally, they are still
2008 ints. This is due to a mismatch of specifications. We would like
2009 to use 64bit thread references internally. This is an adapter
2013 int_to_threadref (threadref *id, int value)
2015 unsigned char *scan;
2017 scan = (unsigned char *) id;
2023 *scan++ = (value >> 24) & 0xff;
2024 *scan++ = (value >> 16) & 0xff;
2025 *scan++ = (value >> 8) & 0xff;
2026 *scan++ = (value & 0xff);
2030 threadref_to_int (threadref *ref)
2033 unsigned char *scan;
2039 value = (value << 8) | ((*scan++) & 0xff);
2044 copy_threadref (threadref *dest, threadref *src)
2047 unsigned char *csrc, *cdest;
2049 csrc = (unsigned char *) src;
2050 cdest = (unsigned char *) dest;
2057 threadmatch (threadref *dest, threadref *src)
2059 /* Things are broken right now, so just assume we got a match. */
2061 unsigned char *srcp, *destp;
2063 srcp = (char *) src;
2064 destp = (char *) dest;
2068 result &= (*srcp++ == *destp++) ? 1 : 0;
2075 threadid:1, # always request threadid
2082 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2085 pack_threadinfo_request (char *pkt, int mode, threadref *id)
2087 *pkt++ = 'q'; /* Info Query */
2088 *pkt++ = 'P'; /* process or thread info */
2089 pkt = pack_int (pkt, mode); /* mode */
2090 pkt = pack_threadid (pkt, id); /* threadid */
2091 *pkt = '\0'; /* terminate */
2095 /* These values tag the fields in a thread info response packet. */
2096 /* Tagging the fields allows us to request specific fields and to
2097 add more fields as time goes by. */
2099 #define TAG_THREADID 1 /* Echo the thread identifier. */
2100 #define TAG_EXISTS 2 /* Is this process defined enough to
2101 fetch registers and its stack? */
2102 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2103 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2104 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2108 remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
2109 struct gdb_ext_thread_info *info)
2111 struct remote_state *rs = get_remote_state ();
2115 char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */
2118 /* info->threadid = 0; FIXME: implement zero_threadref. */
2120 info->display[0] = '\0';
2121 info->shortname[0] = '\0';
2122 info->more_display[0] = '\0';
2124 /* Assume the characters indicating the packet type have been
2126 pkt = unpack_int (pkt, &mask); /* arg mask */
2127 pkt = unpack_threadid (pkt, &ref);
2130 warning (_("Incomplete response to threadinfo request."));
2131 if (!threadmatch (&ref, expectedref))
2132 { /* This is an answer to a different request. */
2133 warning (_("ERROR RMT Thread info mismatch."));
2136 copy_threadref (&info->threadid, &ref);
2138 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2140 /* Packets are terminated with nulls. */
2141 while ((pkt < limit) && mask && *pkt)
2143 pkt = unpack_int (pkt, &tag); /* tag */
2144 pkt = unpack_byte (pkt, &length); /* length */
2145 if (!(tag & mask)) /* Tags out of synch with mask. */
2147 warning (_("ERROR RMT: threadinfo tag mismatch."));
2151 if (tag == TAG_THREADID)
2155 warning (_("ERROR RMT: length of threadid is not 16."));
2159 pkt = unpack_threadid (pkt, &ref);
2160 mask = mask & ~TAG_THREADID;
2163 if (tag == TAG_EXISTS)
2165 info->active = stub_unpack_int (pkt, length);
2167 mask = mask & ~(TAG_EXISTS);
2170 warning (_("ERROR RMT: 'exists' length too long."));
2176 if (tag == TAG_THREADNAME)
2178 pkt = unpack_string (pkt, &info->shortname[0], length);
2179 mask = mask & ~TAG_THREADNAME;
2182 if (tag == TAG_DISPLAY)
2184 pkt = unpack_string (pkt, &info->display[0], length);
2185 mask = mask & ~TAG_DISPLAY;
2188 if (tag == TAG_MOREDISPLAY)
2190 pkt = unpack_string (pkt, &info->more_display[0], length);
2191 mask = mask & ~TAG_MOREDISPLAY;
2194 warning (_("ERROR RMT: unknown thread info tag."));
2195 break; /* Not a tag we know about. */
2201 remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
2202 struct gdb_ext_thread_info *info)
2204 struct remote_state *rs = get_remote_state ();
2207 pack_threadinfo_request (rs->buf, fieldset, threadid);
2209 getpkt (&rs->buf, &rs->buf_size, 0);
2211 if (rs->buf[0] == '\0')
2214 result = remote_unpack_thread_info_response (rs->buf + 2,
2219 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2222 pack_threadlist_request (char *pkt, int startflag, int threadcount,
2223 threadref *nextthread)
2225 *pkt++ = 'q'; /* info query packet */
2226 *pkt++ = 'L'; /* Process LIST or threadLIST request */
2227 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
2228 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
2229 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
2234 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2237 parse_threadlist_response (char *pkt, int result_limit,
2238 threadref *original_echo, threadref *resultlist,
2241 struct remote_state *rs = get_remote_state ();
2243 int count, resultcount, done;
2246 /* Assume the 'q' and 'M chars have been stripped. */
2247 limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE);
2248 /* done parse past here */
2249 pkt = unpack_byte (pkt, &count); /* count field */
2250 pkt = unpack_nibble (pkt, &done);
2251 /* The first threadid is the argument threadid. */
2252 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
2253 while ((count-- > 0) && (pkt < limit))
2255 pkt = unpack_threadid (pkt, resultlist++);
2256 if (resultcount++ >= result_limit)
2265 remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
2266 int *done, int *result_count, threadref *threadlist)
2268 struct remote_state *rs = get_remote_state ();
2269 static threadref echo_nextthread;
2272 /* Trancate result limit to be smaller than the packet size. */
2273 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= get_remote_packet_size ())
2274 result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2;
2276 pack_threadlist_request (rs->buf, startflag, result_limit, nextthread);
2278 getpkt (&rs->buf, &rs->buf_size, 0);
2280 if (*rs->buf == '\0')
2284 parse_threadlist_response (rs->buf + 2, result_limit, &echo_nextthread,
2287 if (!threadmatch (&echo_nextthread, nextthread))
2289 /* FIXME: This is a good reason to drop the packet. */
2290 /* Possably, there is a duplicate response. */
2292 retransmit immediatly - race conditions
2293 retransmit after timeout - yes
2295 wait for packet, then exit
2297 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2298 return 0; /* I choose simply exiting. */
2300 if (*result_count <= 0)
2304 warning (_("RMT ERROR : failed to get remote thread list."));
2307 return result; /* break; */
2309 if (*result_count > result_limit)
2312 warning (_("RMT ERROR: threadlist response longer than requested."));
2318 /* This is the interface between remote and threads, remotes upper
2321 /* remote_find_new_threads retrieves the thread list and for each
2322 thread in the list, looks up the thread in GDB's internal list,
2323 adding the thread if it does not already exist. This involves
2324 getting partial thread lists from the remote target so, polling the
2325 quit_flag is required. */
2328 /* About this many threadisds fit in a packet. */
2330 #define MAXTHREADLISTRESULTS 32
2333 remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
2336 int done, i, result_count;
2340 static threadref nextthread;
2341 static threadref resultthreadlist[MAXTHREADLISTRESULTS];
2346 if (loopcount++ > looplimit)
2349 warning (_("Remote fetch threadlist -infinite loop-."));
2352 if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS,
2353 &done, &result_count, resultthreadlist))
2358 /* Clear for later iterations. */
2360 /* Setup to resume next batch of thread references, set nextthread. */
2361 if (result_count >= 1)
2362 copy_threadref (&nextthread, &resultthreadlist[result_count - 1]);
2364 while (result_count--)
2365 if (!(result = (*stepfunction) (&resultthreadlist[i++], context)))
2372 remote_newthread_step (threadref *ref, void *context)
2374 int pid = ptid_get_pid (inferior_ptid);
2375 ptid_t ptid = ptid_build (pid, 0, threadref_to_int (ref));
2377 if (!in_thread_list (ptid))
2379 return 1; /* continue iterator */
2382 #define CRAZY_MAX_THREADS 1000
2385 remote_current_thread (ptid_t oldpid)
2387 struct remote_state *rs = get_remote_state ();
2390 getpkt (&rs->buf, &rs->buf_size, 0);
2391 if (rs->buf[0] == 'Q' && rs->buf[1] == 'C')
2392 return read_ptid (&rs->buf[2], NULL);
2397 /* Find new threads for info threads command.
2398 * Original version, using John Metzler's thread protocol.
2402 remote_find_new_threads (void)
2404 remote_threadlist_iterator (remote_newthread_step, 0,
2408 #if defined(HAVE_LIBEXPAT)
2410 typedef struct thread_item
2416 DEF_VEC_O(thread_item_t);
2418 struct threads_parsing_context
2420 VEC (thread_item_t) *items;
2424 start_thread (struct gdb_xml_parser *parser,
2425 const struct gdb_xml_element *element,
2426 void *user_data, VEC(gdb_xml_value_s) *attributes)
2428 struct threads_parsing_context *data = user_data;
2430 struct thread_item item;
2433 id = VEC_index (gdb_xml_value_s, attributes, 0)->value;
2434 item.ptid = read_ptid (id, NULL);
2436 if (VEC_length (gdb_xml_value_s, attributes) > 1)
2437 item.core = *(ULONGEST *) VEC_index (gdb_xml_value_s, attributes, 1)->value;
2443 VEC_safe_push (thread_item_t, data->items, &item);
2447 end_thread (struct gdb_xml_parser *parser,
2448 const struct gdb_xml_element *element,
2449 void *user_data, const char *body_text)
2451 struct threads_parsing_context *data = user_data;
2453 if (body_text && *body_text)
2454 VEC_last (thread_item_t, data->items)->extra = strdup (body_text);
2457 const struct gdb_xml_attribute thread_attributes[] = {
2458 { "id", GDB_XML_AF_NONE, NULL, NULL },
2459 { "core", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL },
2460 { NULL, GDB_XML_AF_NONE, NULL, NULL }
2463 const struct gdb_xml_element thread_children[] = {
2464 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
2467 const struct gdb_xml_element threads_children[] = {
2468 { "thread", thread_attributes, thread_children,
2469 GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
2470 start_thread, end_thread },
2471 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
2474 const struct gdb_xml_element threads_elements[] = {
2475 { "threads", NULL, threads_children,
2476 GDB_XML_EF_NONE, NULL, NULL },
2477 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
2483 * Find all threads for info threads command.
2484 * Uses new thread protocol contributed by Cisco.
2485 * Falls back and attempts to use the older method (above)
2486 * if the target doesn't respond to the new method.
2490 remote_threads_info (struct target_ops *ops)
2492 struct remote_state *rs = get_remote_state ();
2496 if (remote_desc == 0) /* paranoia */
2497 error (_("Command can only be used when connected to the remote target."));
2499 #if defined(HAVE_LIBEXPAT)
2500 if (remote_protocol_packets[PACKET_qXfer_threads].support == PACKET_ENABLE)
2502 char *xml = target_read_stralloc (¤t_target,
2503 TARGET_OBJECT_THREADS, NULL);
2505 struct cleanup *back_to = make_cleanup (xfree, xml);
2508 struct gdb_xml_parser *parser;
2509 struct threads_parsing_context context;
2510 struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
2513 parser = gdb_xml_create_parser_and_cleanup (_("threads"),
2517 gdb_xml_use_dtd (parser, "threads.dtd");
2519 if (gdb_xml_parse (parser, xml) == 0)
2522 struct thread_item *item;
2524 for (i = 0; VEC_iterate (thread_item_t, context.items, i, item); ++i)
2526 if (!ptid_equal (item->ptid, null_ptid))
2528 struct private_thread_info *info;
2529 /* In non-stop mode, we assume new found threads
2530 are running until proven otherwise with a
2531 stop reply. In all-stop, we can only get
2532 here if all threads are stopped. */
2533 int running = non_stop ? 1 : 0;
2535 remote_notice_new_inferior (item->ptid, running);
2537 info = demand_private_info (item->ptid);
2538 info->core = item->core;
2539 info->extra = item->extra;
2542 xfree (item->extra);
2546 VEC_free (thread_item_t, context.items);
2549 do_cleanups (back_to);
2554 if (use_threadinfo_query)
2556 putpkt ("qfThreadInfo");
2557 getpkt (&rs->buf, &rs->buf_size, 0);
2559 if (bufp[0] != '\0') /* q packet recognized */
2561 while (*bufp++ == 'm') /* reply contains one or more TID */
2565 new_thread = read_ptid (bufp, &bufp);
2566 if (!ptid_equal (new_thread, null_ptid))
2568 /* In non-stop mode, we assume new found threads
2569 are running until proven otherwise with a
2570 stop reply. In all-stop, we can only get
2571 here if all threads are stopped. */
2572 int running = non_stop ? 1 : 0;
2574 remote_notice_new_inferior (new_thread, running);
2577 while (*bufp++ == ','); /* comma-separated list */
2578 putpkt ("qsThreadInfo");
2579 getpkt (&rs->buf, &rs->buf_size, 0);
2586 /* Only qfThreadInfo is supported in non-stop mode. */
2590 /* Else fall back to old method based on jmetzler protocol. */
2591 use_threadinfo_query = 0;
2592 remote_find_new_threads ();
2597 * Collect a descriptive string about the given thread.
2598 * The target may say anything it wants to about the thread
2599 * (typically info about its blocked / runnable state, name, etc.).
2600 * This string will appear in the info threads display.
2602 * Optional: targets are not required to implement this function.
2606 remote_threads_extra_info (struct thread_info *tp)
2608 struct remote_state *rs = get_remote_state ();
2612 struct gdb_ext_thread_info threadinfo;
2613 static char display_buf[100]; /* arbitrary... */
2614 int n = 0; /* position in display_buf */
2616 if (remote_desc == 0) /* paranoia */
2617 internal_error (__FILE__, __LINE__,
2618 _("remote_threads_extra_info"));
2620 if (ptid_equal (tp->ptid, magic_null_ptid)
2621 || (ptid_get_pid (tp->ptid) != 0 && ptid_get_tid (tp->ptid) == 0))
2622 /* This is the main thread which was added by GDB. The remote
2623 server doesn't know about it. */
2626 if (remote_protocol_packets[PACKET_qXfer_threads].support == PACKET_ENABLE)
2628 struct thread_info *info = find_thread_ptid (tp->ptid);
2629 if (info && info->private)
2630 return info->private->extra;
2635 if (use_threadextra_query)
2638 char *endb = rs->buf + get_remote_packet_size ();
2640 xsnprintf (b, endb - b, "qThreadExtraInfo,");
2642 write_ptid (b, endb, tp->ptid);
2645 getpkt (&rs->buf, &rs->buf_size, 0);
2646 if (rs->buf[0] != 0)
2648 n = min (strlen (rs->buf) / 2, sizeof (display_buf));
2649 result = hex2bin (rs->buf, (gdb_byte *) display_buf, n);
2650 display_buf [result] = '\0';
2655 /* If the above query fails, fall back to the old method. */
2656 use_threadextra_query = 0;
2657 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
2658 | TAG_MOREDISPLAY | TAG_DISPLAY;
2659 int_to_threadref (&id, ptid_get_tid (tp->ptid));
2660 if (remote_get_threadinfo (&id, set, &threadinfo))
2661 if (threadinfo.active)
2663 if (*threadinfo.shortname)
2664 n += xsnprintf (&display_buf[0], sizeof (display_buf) - n,
2665 " Name: %s,", threadinfo.shortname);
2666 if (*threadinfo.display)
2667 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
2668 " State: %s,", threadinfo.display);
2669 if (*threadinfo.more_display)
2670 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
2671 " Priority: %s", threadinfo.more_display);
2675 /* For purely cosmetic reasons, clear up trailing commas. */
2676 if (',' == display_buf[n-1])
2677 display_buf[n-1] = ' ';
2685 /* Implement the to_get_ada_task_ptid function for the remote targets. */
2688 remote_get_ada_task_ptid (long lwp, long thread)
2690 return ptid_build (ptid_get_pid (inferior_ptid), 0, lwp);
2694 /* Restart the remote side; this is an extended protocol operation. */
2697 extended_remote_restart (void)
2699 struct remote_state *rs = get_remote_state ();
2701 /* Send the restart command; for reasons I don't understand the
2702 remote side really expects a number after the "R". */
2703 xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0);
2706 remote_fileio_reset ();
2709 /* Clean up connection to a remote debugger. */
2712 remote_close (int quitting)
2714 if (remote_desc == NULL)
2715 return; /* already closed */
2717 /* Make sure we leave stdin registered in the event loop, and we
2718 don't leave the async SIGINT signal handler installed. */
2719 remote_terminal_ours ();
2721 serial_close (remote_desc);
2724 /* We don't have a connection to the remote stub anymore. Get rid
2725 of all the inferiors and their threads we were controlling. */
2726 discard_all_inferiors ();
2728 /* We're no longer interested in any of these events. */
2729 discard_pending_stop_replies (-1);
2731 if (remote_async_inferior_event_token)
2732 delete_async_event_handler (&remote_async_inferior_event_token);
2733 if (remote_async_get_pending_events_token)
2734 delete_async_event_handler (&remote_async_get_pending_events_token);
2737 /* Query the remote side for the text, data and bss offsets. */
2742 struct remote_state *rs = get_remote_state ();
2745 int lose, num_segments = 0, do_sections, do_segments;
2746 CORE_ADDR text_addr, data_addr, bss_addr, segments[2];
2747 struct section_offsets *offs;
2748 struct symfile_segment_data *data;
2750 if (symfile_objfile == NULL)
2753 putpkt ("qOffsets");
2754 getpkt (&rs->buf, &rs->buf_size, 0);
2757 if (buf[0] == '\000')
2758 return; /* Return silently. Stub doesn't support
2762 warning (_("Remote failure reply: %s"), buf);
2766 /* Pick up each field in turn. This used to be done with scanf, but
2767 scanf will make trouble if CORE_ADDR size doesn't match
2768 conversion directives correctly. The following code will work
2769 with any size of CORE_ADDR. */
2770 text_addr = data_addr = bss_addr = 0;
2774 if (strncmp (ptr, "Text=", 5) == 0)
2777 /* Don't use strtol, could lose on big values. */
2778 while (*ptr && *ptr != ';')
2779 text_addr = (text_addr << 4) + fromhex (*ptr++);
2781 if (strncmp (ptr, ";Data=", 6) == 0)
2784 while (*ptr && *ptr != ';')
2785 data_addr = (data_addr << 4) + fromhex (*ptr++);
2790 if (!lose && strncmp (ptr, ";Bss=", 5) == 0)
2793 while (*ptr && *ptr != ';')
2794 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
2796 if (bss_addr != data_addr)
2797 warning (_("Target reported unsupported offsets: %s"), buf);
2802 else if (strncmp (ptr, "TextSeg=", 8) == 0)
2805 /* Don't use strtol, could lose on big values. */
2806 while (*ptr && *ptr != ';')
2807 text_addr = (text_addr << 4) + fromhex (*ptr++);
2810 if (strncmp (ptr, ";DataSeg=", 9) == 0)
2813 while (*ptr && *ptr != ';')
2814 data_addr = (data_addr << 4) + fromhex (*ptr++);
2822 error (_("Malformed response to offset query, %s"), buf);
2823 else if (*ptr != '\0')
2824 warning (_("Target reported unsupported offsets: %s"), buf);
2826 offs = ((struct section_offsets *)
2827 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
2828 memcpy (offs, symfile_objfile->section_offsets,
2829 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
2831 data = get_symfile_segment_data (symfile_objfile->obfd);
2832 do_segments = (data != NULL);
2833 do_sections = num_segments == 0;
2835 if (num_segments > 0)
2837 segments[0] = text_addr;
2838 segments[1] = data_addr;
2840 /* If we have two segments, we can still try to relocate everything
2841 by assuming that the .text and .data offsets apply to the whole
2842 text and data segments. Convert the offsets given in the packet
2843 to base addresses for symfile_map_offsets_to_segments. */
2844 else if (data && data->num_segments == 2)
2846 segments[0] = data->segment_bases[0] + text_addr;
2847 segments[1] = data->segment_bases[1] + data_addr;
2850 /* If the object file has only one segment, assume that it is text
2851 rather than data; main programs with no writable data are rare,
2852 but programs with no code are useless. Of course the code might
2853 have ended up in the data segment... to detect that we would need
2854 the permissions here. */
2855 else if (data && data->num_segments == 1)
2857 segments[0] = data->segment_bases[0] + text_addr;
2860 /* There's no way to relocate by segment. */
2866 int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data,
2867 offs, num_segments, segments);
2869 if (ret == 0 && !do_sections)
2870 error (_("Can not handle qOffsets TextSeg response with this symbol file"));
2877 free_symfile_segment_data (data);
2881 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
2883 /* This is a temporary kludge to force data and bss to use the same offsets
2884 because that's what nlmconv does now. The real solution requires changes
2885 to the stub and remote.c that I don't have time to do right now. */
2887 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
2888 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
2891 objfile_relocate (symfile_objfile, offs);
2894 /* Callback for iterate_over_threads. Set the STOP_REQUESTED flags in
2895 threads we know are stopped already. This is used during the
2896 initial remote connection in non-stop mode --- threads that are
2897 reported as already being stopped are left stopped. */
2900 set_stop_requested_callback (struct thread_info *thread, void *data)
2902 /* If we have a stop reply for this thread, it must be stopped. */
2903 if (peek_stop_reply (thread->ptid))
2904 set_stop_requested (thread->ptid, 1);
2909 /* Stub for catch_exception. */
2911 struct start_remote_args
2915 /* The current target. */
2916 struct target_ops *target;
2918 /* Non-zero if this is an extended-remote target. */
2922 /* Send interrupt_sequence to remote target. */
2924 send_interrupt_sequence ()
2926 if (interrupt_sequence_mode == interrupt_sequence_control_c)
2927 serial_write (remote_desc, "\x03", 1);
2928 else if (interrupt_sequence_mode == interrupt_sequence_break)
2929 serial_send_break (remote_desc);
2930 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
2932 serial_send_break (remote_desc);
2933 serial_write (remote_desc, "g", 1);
2936 internal_error (__FILE__, __LINE__,
2937 _("Invalid value for interrupt_sequence_mode: %s."),
2938 interrupt_sequence_mode);
2942 remote_start_remote (struct ui_out *uiout, void *opaque)
2944 struct start_remote_args *args = opaque;
2945 struct remote_state *rs = get_remote_state ();
2946 struct packet_config *noack_config;
2947 char *wait_status = NULL;
2949 immediate_quit++; /* Allow user to interrupt it. */
2951 /* Ack any packet which the remote side has already sent. */
2952 serial_write (remote_desc, "+", 1);
2954 if (interrupt_on_connect)
2955 send_interrupt_sequence ();
2957 /* The first packet we send to the target is the optional "supported
2958 packets" request. If the target can answer this, it will tell us
2959 which later probes to skip. */
2960 remote_query_supported ();
2962 /* Next, we possibly activate noack mode.
2964 If the QStartNoAckMode packet configuration is set to AUTO,
2965 enable noack mode if the stub reported a wish for it with
2968 If set to TRUE, then enable noack mode even if the stub didn't
2969 report it in qSupported. If the stub doesn't reply OK, the
2970 session ends with an error.
2972 If FALSE, then don't activate noack mode, regardless of what the
2973 stub claimed should be the default with qSupported. */
2975 noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode];
2977 if (noack_config->detect == AUTO_BOOLEAN_TRUE
2978 || (noack_config->detect == AUTO_BOOLEAN_AUTO
2979 && noack_config->support == PACKET_ENABLE))
2981 putpkt ("QStartNoAckMode");
2982 getpkt (&rs->buf, &rs->buf_size, 0);
2983 if (packet_ok (rs->buf, noack_config) == PACKET_OK)
2987 if (args->extended_p)
2989 /* Tell the remote that we are using the extended protocol. */
2991 getpkt (&rs->buf, &rs->buf_size, 0);
2994 /* Next, if the target can specify a description, read it. We do
2995 this before anything involving memory or registers. */
2996 target_find_description ();
2998 /* Next, now that we know something about the target, update the
2999 address spaces in the program spaces. */
3000 update_address_spaces ();
3002 /* On OSs where the list of libraries is global to all
3003 processes, we fetch them early. */
3004 if (gdbarch_has_global_solist (target_gdbarch))
3005 solib_add (NULL, args->from_tty, args->target, auto_solib_add);
3009 if (!rs->non_stop_aware)
3010 error (_("Non-stop mode requested, but remote does not support non-stop"));
3012 putpkt ("QNonStop:1");
3013 getpkt (&rs->buf, &rs->buf_size, 0);
3015 if (strcmp (rs->buf, "OK") != 0)
3016 error ("Remote refused setting non-stop mode with: %s", rs->buf);
3018 /* Find about threads and processes the stub is already
3019 controlling. We default to adding them in the running state.
3020 The '?' query below will then tell us about which threads are
3022 remote_threads_info (args->target);
3024 else if (rs->non_stop_aware)
3026 /* Don't assume that the stub can operate in all-stop mode.
3027 Request it explicitely. */
3028 putpkt ("QNonStop:0");
3029 getpkt (&rs->buf, &rs->buf_size, 0);
3031 if (strcmp (rs->buf, "OK") != 0)
3032 error ("Remote refused setting all-stop mode with: %s", rs->buf);
3035 /* Check whether the target is running now. */
3037 getpkt (&rs->buf, &rs->buf_size, 0);
3041 if (rs->buf[0] == 'W' || rs->buf[0] == 'X')
3043 if (!args->extended_p)
3044 error (_("The target is not running (try extended-remote?)"));
3046 /* We're connected, but not running. Drop out before we
3047 call start_remote. */
3052 /* Save the reply for later. */
3053 wait_status = alloca (strlen (rs->buf) + 1);
3054 strcpy (wait_status, rs->buf);
3057 /* Let the stub know that we want it to return the thread. */
3058 set_continue_thread (minus_one_ptid);
3060 /* Without this, some commands which require an active target
3061 (such as kill) won't work. This variable serves (at least)
3062 double duty as both the pid of the target process (if it has
3063 such), and as a flag indicating that a target is active.
3064 These functions should be split out into seperate variables,
3065 especially since GDB will someday have a notion of debugging
3066 several processes. */
3067 inferior_ptid = magic_null_ptid;
3069 /* Now, if we have thread information, update inferior_ptid. */
3070 inferior_ptid = remote_current_thread (inferior_ptid);
3072 remote_add_inferior (ptid_get_pid (inferior_ptid), -1);
3074 /* Always add the main thread. */
3075 add_thread_silent (inferior_ptid);
3077 get_offsets (); /* Get text, data & bss offsets. */
3079 /* If we could not find a description using qXfer, and we know
3080 how to do it some other way, try again. This is not
3081 supported for non-stop; it could be, but it is tricky if
3082 there are no stopped threads when we connect. */
3083 if (remote_read_description_p (args->target)
3084 && gdbarch_target_desc (target_gdbarch) == NULL)
3086 target_clear_description ();
3087 target_find_description ();
3090 /* Use the previously fetched status. */
3091 gdb_assert (wait_status != NULL);
3092 strcpy (rs->buf, wait_status);
3093 rs->cached_wait_status = 1;
3096 start_remote (args->from_tty); /* Initialize gdb process mechanisms. */
3100 /* Clear WFI global state. Do this before finding about new
3101 threads and inferiors, and setting the current inferior.
3102 Otherwise we would clear the proceed status of the current
3103 inferior when we want its stop_soon state to be preserved
3104 (see notice_new_inferior). */
3105 init_wait_for_inferior ();
3107 /* In non-stop, we will either get an "OK", meaning that there
3108 are no stopped threads at this time; or, a regular stop
3109 reply. In the latter case, there may be more than one thread
3110 stopped --- we pull them all out using the vStopped
3112 if (strcmp (rs->buf, "OK") != 0)
3114 struct stop_reply *stop_reply;
3115 struct cleanup *old_chain;
3117 stop_reply = stop_reply_xmalloc ();
3118 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
3120 remote_parse_stop_reply (rs->buf, stop_reply);
3121 discard_cleanups (old_chain);
3123 /* get_pending_stop_replies acks this one, and gets the rest
3125 pending_stop_reply = stop_reply;
3126 remote_get_pending_stop_replies ();
3128 /* Make sure that threads that were stopped remain
3130 iterate_over_threads (set_stop_requested_callback, NULL);
3133 if (target_can_async_p ())
3134 target_async (inferior_event_handler, 0);
3136 if (thread_count () == 0)
3138 if (!args->extended_p)
3139 error (_("The target is not running (try extended-remote?)"));
3141 /* We're connected, but not running. Drop out before we
3142 call start_remote. */
3146 /* Let the stub know that we want it to return the thread. */
3148 /* Force the stub to choose a thread. */
3149 set_general_thread (null_ptid);
3152 inferior_ptid = remote_current_thread (minus_one_ptid);
3153 if (ptid_equal (inferior_ptid, minus_one_ptid))
3154 error (_("remote didn't report the current thread in non-stop mode"));
3156 get_offsets (); /* Get text, data & bss offsets. */
3158 /* In non-stop mode, any cached wait status will be stored in
3159 the stop reply queue. */
3160 gdb_assert (wait_status == NULL);
3163 /* If we connected to a live target, do some additional setup. */
3164 if (target_has_execution)
3166 if (exec_bfd) /* No use without an exec file. */
3167 remote_check_symbols (symfile_objfile);
3170 /* Possibly the target has been engaged in a trace run started
3171 previously; find out where things are at. */
3172 if (rs->disconnected_tracing)
3174 struct uploaded_tp *uploaded_tps = NULL;
3175 struct uploaded_tsv *uploaded_tsvs = NULL;
3177 remote_get_trace_status (current_trace_status ());
3178 if (current_trace_status ()->running)
3179 printf_filtered (_("Trace is already running on the target.\n"));
3181 /* Get trace state variables first, they may be checked when
3182 parsing uploaded commands. */
3184 remote_upload_trace_state_variables (&uploaded_tsvs);
3186 merge_uploaded_trace_state_variables (&uploaded_tsvs);
3188 remote_upload_tracepoints (&uploaded_tps);
3190 merge_uploaded_tracepoints (&uploaded_tps);
3193 /* If breakpoints are global, insert them now. */
3194 if (gdbarch_has_global_breakpoints (target_gdbarch)
3195 && breakpoints_always_inserted_mode ())
3196 insert_breakpoints ();
3199 /* Open a connection to a remote debugger.
3200 NAME is the filename used for communication. */
3203 remote_open (char *name, int from_tty)
3205 remote_open_1 (name, from_tty, &remote_ops, 0);
3208 /* Open a connection to a remote debugger using the extended
3209 remote gdb protocol. NAME is the filename used for communication. */
3212 extended_remote_open (char *name, int from_tty)
3214 remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */);
3217 /* Generic code for opening a connection to a remote target. */
3220 init_all_packet_configs (void)
3223 for (i = 0; i < PACKET_MAX; i++)
3224 update_packet_config (&remote_protocol_packets[i]);
3227 /* Symbol look-up. */
3230 remote_check_symbols (struct objfile *objfile)
3232 struct remote_state *rs = get_remote_state ();
3233 char *msg, *reply, *tmp;
3234 struct minimal_symbol *sym;
3237 if (remote_protocol_packets[PACKET_qSymbol].support == PACKET_DISABLE)
3240 /* Make sure the remote is pointing at the right process. */
3241 set_general_process ();
3243 /* Allocate a message buffer. We can't reuse the input buffer in RS,
3244 because we need both at the same time. */
3245 msg = alloca (get_remote_packet_size ());
3247 /* Invite target to request symbol lookups. */
3249 putpkt ("qSymbol::");
3250 getpkt (&rs->buf, &rs->buf_size, 0);
3251 packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSymbol]);
3254 while (strncmp (reply, "qSymbol:", 8) == 0)
3257 end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2);
3259 sym = lookup_minimal_symbol (msg, NULL, NULL);
3261 xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]);
3264 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
3265 CORE_ADDR sym_addr = SYMBOL_VALUE_ADDRESS (sym);
3267 /* If this is a function address, return the start of code
3268 instead of any data function descriptor. */
3269 sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch,
3273 xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s",
3274 phex_nz (sym_addr, addr_size), &reply[8]);
3278 getpkt (&rs->buf, &rs->buf_size, 0);
3283 static struct serial *
3284 remote_serial_open (char *name)
3286 static int udp_warning = 0;
3288 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
3289 of in ser-tcp.c, because it is the remote protocol assuming that the
3290 serial connection is reliable and not the serial connection promising
3292 if (!udp_warning && strncmp (name, "udp:", 4) == 0)
3295 The remote protocol may be unreliable over UDP.\n\
3296 Some events may be lost, rendering further debugging impossible."));
3300 return serial_open (name);
3303 /* This type describes each known response to the qSupported
3305 struct protocol_feature
3307 /* The name of this protocol feature. */
3310 /* The default for this protocol feature. */
3311 enum packet_support default_support;
3313 /* The function to call when this feature is reported, or after
3314 qSupported processing if the feature is not supported.
3315 The first argument points to this structure. The second
3316 argument indicates whether the packet requested support be
3317 enabled, disabled, or probed (or the default, if this function
3318 is being called at the end of processing and this feature was
3319 not reported). The third argument may be NULL; if not NULL, it
3320 is a NUL-terminated string taken from the packet following
3321 this feature's name and an equals sign. */
3322 void (*func) (const struct protocol_feature *, enum packet_support,
3325 /* The corresponding packet for this feature. Only used if
3326 FUNC is remote_supported_packet. */
3331 remote_supported_packet (const struct protocol_feature *feature,
3332 enum packet_support support,
3333 const char *argument)
3337 warning (_("Remote qSupported response supplied an unexpected value for"
3338 " \"%s\"."), feature->name);
3342 if (remote_protocol_packets[feature->packet].support
3343 == PACKET_SUPPORT_UNKNOWN)
3344 remote_protocol_packets[feature->packet].support = support;
3348 remote_packet_size (const struct protocol_feature *feature,
3349 enum packet_support support, const char *value)
3351 struct remote_state *rs = get_remote_state ();
3356 if (support != PACKET_ENABLE)
3359 if (value == NULL || *value == '\0')
3361 warning (_("Remote target reported \"%s\" without a size."),
3367 packet_size = strtol (value, &value_end, 16);
3368 if (errno != 0 || *value_end != '\0' || packet_size < 0)
3370 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
3371 feature->name, value);
3375 if (packet_size > MAX_REMOTE_PACKET_SIZE)
3377 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
3378 packet_size, MAX_REMOTE_PACKET_SIZE);
3379 packet_size = MAX_REMOTE_PACKET_SIZE;
3382 /* Record the new maximum packet size. */
3383 rs->explicit_packet_size = packet_size;
3387 remote_multi_process_feature (const struct protocol_feature *feature,
3388 enum packet_support support, const char *value)
3390 struct remote_state *rs = get_remote_state ();
3391 rs->multi_process_aware = (support == PACKET_ENABLE);
3395 remote_non_stop_feature (const struct protocol_feature *feature,
3396 enum packet_support support, const char *value)
3398 struct remote_state *rs = get_remote_state ();
3399 rs->non_stop_aware = (support == PACKET_ENABLE);
3403 remote_cond_tracepoint_feature (const struct protocol_feature *feature,
3404 enum packet_support support,
3407 struct remote_state *rs = get_remote_state ();
3408 rs->cond_tracepoints = (support == PACKET_ENABLE);
3412 remote_fast_tracepoint_feature (const struct protocol_feature *feature,
3413 enum packet_support support,
3416 struct remote_state *rs = get_remote_state ();
3417 rs->fast_tracepoints = (support == PACKET_ENABLE);
3421 remote_disconnected_tracing_feature (const struct protocol_feature *feature,
3422 enum packet_support support,
3425 struct remote_state *rs = get_remote_state ();
3426 rs->disconnected_tracing = (support == PACKET_ENABLE);
3429 static struct protocol_feature remote_protocol_features[] = {
3430 { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
3431 { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
3432 PACKET_qXfer_auxv },
3433 { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet,
3434 PACKET_qXfer_features },
3435 { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet,
3436 PACKET_qXfer_libraries },
3437 { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet,
3438 PACKET_qXfer_memory_map },
3439 { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet,
3440 PACKET_qXfer_spu_read },
3441 { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet,
3442 PACKET_qXfer_spu_write },
3443 { "qXfer:osdata:read", PACKET_DISABLE, remote_supported_packet,
3444 PACKET_qXfer_osdata },
3445 { "qXfer:threads:read", PACKET_DISABLE, remote_supported_packet,
3446 PACKET_qXfer_threads },
3447 { "QPassSignals", PACKET_DISABLE, remote_supported_packet,
3448 PACKET_QPassSignals },
3449 { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet,
3450 PACKET_QStartNoAckMode },
3451 { "multiprocess", PACKET_DISABLE, remote_multi_process_feature, -1 },
3452 { "QNonStop", PACKET_DISABLE, remote_non_stop_feature, -1 },
3453 { "qXfer:siginfo:read", PACKET_DISABLE, remote_supported_packet,
3454 PACKET_qXfer_siginfo_read },
3455 { "qXfer:siginfo:write", PACKET_DISABLE, remote_supported_packet,
3456 PACKET_qXfer_siginfo_write },
3457 { "ConditionalTracepoints", PACKET_DISABLE, remote_cond_tracepoint_feature,
3458 PACKET_ConditionalTracepoints },
3459 { "FastTracepoints", PACKET_DISABLE, remote_fast_tracepoint_feature,
3460 PACKET_FastTracepoints },
3461 { "DisconnectedTracing", PACKET_DISABLE, remote_disconnected_tracing_feature,
3463 { "ReverseContinue", PACKET_DISABLE, remote_supported_packet,
3465 { "ReverseStep", PACKET_DISABLE, remote_supported_packet,
3470 remote_query_supported (void)
3472 struct remote_state *rs = get_remote_state ();
3475 unsigned char seen [ARRAY_SIZE (remote_protocol_features)];
3477 /* The packet support flags are handled differently for this packet
3478 than for most others. We treat an error, a disabled packet, and
3479 an empty response identically: any features which must be reported
3480 to be used will be automatically disabled. An empty buffer
3481 accomplishes this, since that is also the representation for a list
3482 containing no features. */
3485 if (remote_protocol_packets[PACKET_qSupported].support != PACKET_DISABLE)
3487 const char *qsupported = gdbarch_qsupported (target_gdbarch);
3492 q = concat ("qSupported:multiprocess+;", qsupported, NULL);
3494 q = concat ("qSupported:", qsupported, NULL);
3501 putpkt ("qSupported:multiprocess+");
3503 putpkt ("qSupported");
3506 getpkt (&rs->buf, &rs->buf_size, 0);
3508 /* If an error occured, warn, but do not return - just reset the
3509 buffer to empty and go on to disable features. */
3510 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported])
3513 warning (_("Remote failure reply: %s"), rs->buf);
3518 memset (seen, 0, sizeof (seen));
3523 enum packet_support is_supported;
3524 char *p, *end, *name_end, *value;
3526 /* First separate out this item from the rest of the packet. If
3527 there's another item after this, we overwrite the separator
3528 (terminated strings are much easier to work with). */
3530 end = strchr (p, ';');
3533 end = p + strlen (p);
3543 warning (_("empty item in \"qSupported\" response"));
3548 name_end = strchr (p, '=');
3551 /* This is a name=value entry. */
3552 is_supported = PACKET_ENABLE;
3553 value = name_end + 1;
3562 is_supported = PACKET_ENABLE;
3566 is_supported = PACKET_DISABLE;
3570 is_supported = PACKET_SUPPORT_UNKNOWN;
3574 warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p);
3580 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
3581 if (strcmp (remote_protocol_features[i].name, p) == 0)
3583 const struct protocol_feature *feature;
3586 feature = &remote_protocol_features[i];
3587 feature->func (feature, is_supported, value);
3592 /* If we increased the packet size, make sure to increase the global
3593 buffer size also. We delay this until after parsing the entire
3594 qSupported packet, because this is the same buffer we were
3596 if (rs->buf_size < rs->explicit_packet_size)
3598 rs->buf_size = rs->explicit_packet_size;
3599 rs->buf = xrealloc (rs->buf, rs->buf_size);
3602 /* Handle the defaults for unmentioned features. */
3603 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
3606 const struct protocol_feature *feature;
3608 feature = &remote_protocol_features[i];
3609 feature->func (feature, feature->default_support, NULL);
3615 remote_open_1 (char *name, int from_tty, struct target_ops *target, int extended_p)
3617 struct remote_state *rs = get_remote_state ();
3620 error (_("To open a remote debug connection, you need to specify what\n"
3621 "serial device is attached to the remote system\n"
3622 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
3624 /* See FIXME above. */
3625 if (!target_async_permitted)
3626 wait_forever_enabled_p = 1;
3628 /* If we're connected to a running target, target_preopen will kill it.
3629 But if we're connected to a target system with no running process,
3630 then we will still be connected when it returns. Ask this question
3631 first, before target_preopen has a chance to kill anything. */
3632 if (remote_desc != NULL && !have_inferiors ())
3635 || query (_("Already connected to a remote target. Disconnect? ")))
3638 error (_("Still connected."));
3641 target_preopen (from_tty);
3643 unpush_target (target);
3645 /* This time without a query. If we were connected to an
3646 extended-remote target and target_preopen killed the running
3647 process, we may still be connected. If we are starting "target
3648 remote" now, the extended-remote target will not have been
3649 removed by unpush_target. */
3650 if (remote_desc != NULL && !have_inferiors ())
3653 /* Make sure we send the passed signals list the next time we resume. */
3654 xfree (last_pass_packet);
3655 last_pass_packet = NULL;
3657 remote_fileio_reset ();
3658 reopen_exec_file ();
3661 remote_desc = remote_serial_open (name);
3663 perror_with_name (name);
3665 if (baud_rate != -1)
3667 if (serial_setbaudrate (remote_desc, baud_rate))
3669 /* The requested speed could not be set. Error out to
3670 top level after closing remote_desc. Take care to
3671 set remote_desc to NULL to avoid closing remote_desc
3673 serial_close (remote_desc);
3675 perror_with_name (name);
3679 serial_raw (remote_desc);
3681 /* If there is something sitting in the buffer we might take it as a
3682 response to a command, which would be bad. */
3683 serial_flush_input (remote_desc);
3687 puts_filtered ("Remote debugging using ");
3688 puts_filtered (name);
3689 puts_filtered ("\n");
3691 push_target (target); /* Switch to using remote target now. */
3693 /* Register extra event sources in the event loop. */
3694 remote_async_inferior_event_token
3695 = create_async_event_handler (remote_async_inferior_event_handler,
3697 remote_async_get_pending_events_token
3698 = create_async_event_handler (remote_async_get_pending_events_handler,
3701 /* Reset the target state; these things will be queried either by
3702 remote_query_supported or as they are needed. */
3703 init_all_packet_configs ();
3704 rs->cached_wait_status = 0;
3705 rs->explicit_packet_size = 0;
3707 rs->multi_process_aware = 0;
3708 rs->extended = extended_p;
3709 rs->non_stop_aware = 0;
3710 rs->waiting_for_stop_reply = 0;
3711 rs->ctrlc_pending_p = 0;
3713 general_thread = not_sent_ptid;
3714 continue_thread = not_sent_ptid;
3716 /* Probe for ability to use "ThreadInfo" query, as required. */
3717 use_threadinfo_query = 1;
3718 use_threadextra_query = 1;
3720 if (target_async_permitted)
3722 /* With this target we start out by owning the terminal. */
3723 remote_async_terminal_ours_p = 1;
3725 /* FIXME: cagney/1999-09-23: During the initial connection it is
3726 assumed that the target is already ready and able to respond to
3727 requests. Unfortunately remote_start_remote() eventually calls
3728 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
3729 around this. Eventually a mechanism that allows
3730 wait_for_inferior() to expect/get timeouts will be
3732 wait_forever_enabled_p = 0;
3735 /* First delete any symbols previously loaded from shared libraries. */
3736 no_shared_libraries (NULL, 0);
3739 init_thread_list ();
3741 /* Start the remote connection. If error() or QUIT, discard this
3742 target (we'd otherwise be in an inconsistent state) and then
3743 propogate the error on up the exception chain. This ensures that
3744 the caller doesn't stumble along blindly assuming that the
3745 function succeeded. The CLI doesn't have this problem but other
3746 UI's, such as MI do.
3748 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
3749 this function should return an error indication letting the
3750 caller restore the previous state. Unfortunately the command
3751 ``target remote'' is directly wired to this function making that
3752 impossible. On a positive note, the CLI side of this problem has
3753 been fixed - the function set_cmd_context() makes it possible for
3754 all the ``target ....'' commands to share a common callback
3755 function. See cli-dump.c. */
3757 struct gdb_exception ex;
3758 struct start_remote_args args;
3760 args.from_tty = from_tty;
3761 args.target = target;
3762 args.extended_p = extended_p;
3764 ex = catch_exception (uiout, remote_start_remote, &args, RETURN_MASK_ALL);
3767 /* Pop the partially set up target - unless something else did
3768 already before throwing the exception. */
3769 if (remote_desc != NULL)
3771 if (target_async_permitted)
3772 wait_forever_enabled_p = 1;
3773 throw_exception (ex);
3777 if (target_async_permitted)
3778 wait_forever_enabled_p = 1;
3781 /* This takes a program previously attached to and detaches it. After
3782 this is done, GDB can be used to debug some other program. We
3783 better not have left any breakpoints in the target program or it'll
3784 die when it hits one. */
3787 remote_detach_1 (char *args, int from_tty, int extended)
3789 int pid = ptid_get_pid (inferior_ptid);
3790 struct remote_state *rs = get_remote_state ();
3793 error (_("Argument given to \"detach\" when remotely debugging."));
3795 if (!target_has_execution)
3796 error (_("No process to detach from."));
3798 /* Tell the remote target to detach. */
3799 if (remote_multi_process_p (rs))
3800 sprintf (rs->buf, "D;%x", pid);
3802 strcpy (rs->buf, "D");
3805 getpkt (&rs->buf, &rs->buf_size, 0);
3807 if (rs->buf[0] == 'O' && rs->buf[1] == 'K')
3809 else if (rs->buf[0] == '\0')
3810 error (_("Remote doesn't know how to detach"));
3812 error (_("Can't detach process."));
3816 if (remote_multi_process_p (rs))
3817 printf_filtered (_("Detached from remote %s.\n"),
3818 target_pid_to_str (pid_to_ptid (pid)));
3822 puts_filtered (_("Detached from remote process.\n"));
3824 puts_filtered (_("Ending remote debugging.\n"));
3828 discard_pending_stop_replies (pid);
3829 target_mourn_inferior ();
3833 remote_detach (struct target_ops *ops, char *args, int from_tty)
3835 remote_detach_1 (args, from_tty, 0);
3839 extended_remote_detach (struct target_ops *ops, char *args, int from_tty)
3841 remote_detach_1 (args, from_tty, 1);
3844 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
3847 remote_disconnect (struct target_ops *target, char *args, int from_tty)
3850 error (_("Argument given to \"disconnect\" when remotely debugging."));
3852 /* Make sure we unpush even the extended remote targets; mourn
3853 won't do it. So call remote_mourn_1 directly instead of
3854 target_mourn_inferior. */
3855 remote_mourn_1 (target);
3858 puts_filtered ("Ending remote debugging.\n");
3861 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
3862 be chatty about it. */
3865 extended_remote_attach_1 (struct target_ops *target, char *args, int from_tty)
3867 struct remote_state *rs = get_remote_state ();
3869 char *wait_status = NULL;
3871 pid = parse_pid_to_attach (args);
3873 /* Remote PID can be freely equal to getpid, do not check it here the same
3874 way as in other targets. */
3876 if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE)
3877 error (_("This target does not support attaching to a process"));
3879 sprintf (rs->buf, "vAttach;%x", pid);
3881 getpkt (&rs->buf, &rs->buf_size, 0);
3883 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vAttach]) == PACKET_OK)
3886 printf_unfiltered (_("Attached to %s\n"),
3887 target_pid_to_str (pid_to_ptid (pid)));
3891 /* Save the reply for later. */
3892 wait_status = alloca (strlen (rs->buf) + 1);
3893 strcpy (wait_status, rs->buf);
3895 else if (strcmp (rs->buf, "OK") != 0)
3896 error (_("Attaching to %s failed with: %s"),
3897 target_pid_to_str (pid_to_ptid (pid)),
3900 else if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE)
3901 error (_("This target does not support attaching to a process"));
3903 error (_("Attaching to %s failed"),
3904 target_pid_to_str (pid_to_ptid (pid)));
3906 set_current_inferior (remote_add_inferior (pid, 1));
3908 inferior_ptid = pid_to_ptid (pid);
3912 struct thread_info *thread;
3914 /* Get list of threads. */
3915 remote_threads_info (target);
3917 thread = first_thread_of_process (pid);
3919 inferior_ptid = thread->ptid;
3921 inferior_ptid = pid_to_ptid (pid);
3923 /* Invalidate our notion of the remote current thread. */
3924 record_currthread (minus_one_ptid);
3928 /* Now, if we have thread information, update inferior_ptid. */
3929 inferior_ptid = remote_current_thread (inferior_ptid);
3931 /* Add the main thread to the thread list. */
3932 add_thread_silent (inferior_ptid);
3935 /* Next, if the target can specify a description, read it. We do
3936 this before anything involving memory or registers. */
3937 target_find_description ();
3941 /* Use the previously fetched status. */
3942 gdb_assert (wait_status != NULL);
3944 if (target_can_async_p ())
3946 struct stop_reply *stop_reply;
3947 struct cleanup *old_chain;
3949 stop_reply = stop_reply_xmalloc ();
3950 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
3951 remote_parse_stop_reply (wait_status, stop_reply);
3952 discard_cleanups (old_chain);
3953 push_stop_reply (stop_reply);
3955 target_async (inferior_event_handler, 0);
3959 gdb_assert (wait_status != NULL);
3960 strcpy (rs->buf, wait_status);
3961 rs->cached_wait_status = 1;
3965 gdb_assert (wait_status == NULL);
3969 extended_remote_attach (struct target_ops *ops, char *args, int from_tty)
3971 extended_remote_attach_1 (ops, args, from_tty);
3974 /* Convert hex digit A to a number. */
3979 if (a >= '0' && a <= '9')
3981 else if (a >= 'a' && a <= 'f')
3982 return a - 'a' + 10;
3983 else if (a >= 'A' && a <= 'F')
3984 return a - 'A' + 10;
3986 error (_("Reply contains invalid hex digit %d"), a);
3990 hex2bin (const char *hex, gdb_byte *bin, int count)
3994 for (i = 0; i < count; i++)
3996 if (hex[0] == 0 || hex[1] == 0)
3998 /* Hex string is short, or of uneven length.
3999 Return the count that has been converted so far. */
4002 *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]);
4008 /* Convert number NIB to a hex digit. */
4016 return 'a' + nib - 10;
4020 bin2hex (const gdb_byte *bin, char *hex, int count)
4023 /* May use a length, or a nul-terminated string as input. */
4025 count = strlen ((char *) bin);
4027 for (i = 0; i < count; i++)
4029 *hex++ = tohex ((*bin >> 4) & 0xf);
4030 *hex++ = tohex (*bin++ & 0xf);
4036 /* Check for the availability of vCont. This function should also check
4040 remote_vcont_probe (struct remote_state *rs)
4044 strcpy (rs->buf, "vCont?");
4046 getpkt (&rs->buf, &rs->buf_size, 0);
4049 /* Make sure that the features we assume are supported. */
4050 if (strncmp (buf, "vCont", 5) == 0)
4053 int support_s, support_S, support_c, support_C;
4059 rs->support_vCont_t = 0;
4060 while (p && *p == ';')
4063 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
4065 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
4067 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
4069 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
4071 else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0))
4072 rs->support_vCont_t = 1;
4074 p = strchr (p, ';');
4077 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
4078 BUF will make packet_ok disable the packet. */
4079 if (!support_s || !support_S || !support_c || !support_C)
4083 packet_ok (buf, &remote_protocol_packets[PACKET_vCont]);
4086 /* Helper function for building "vCont" resumptions. Write a
4087 resumption to P. ENDP points to one-passed-the-end of the buffer
4088 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
4089 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
4090 resumed thread should be single-stepped and/or signalled. If PTID
4091 equals minus_one_ptid, then all threads are resumed; if PTID
4092 represents a process, then all threads of the process are resumed;
4093 the thread to be stepped and/or signalled is given in the global
4097 append_resumption (char *p, char *endp,
4098 ptid_t ptid, int step, enum target_signal siggnal)
4100 struct remote_state *rs = get_remote_state ();
4102 if (step && siggnal != TARGET_SIGNAL_0)
4103 p += xsnprintf (p, endp - p, ";S%02x", siggnal);
4105 p += xsnprintf (p, endp - p, ";s");
4106 else if (siggnal != TARGET_SIGNAL_0)
4107 p += xsnprintf (p, endp - p, ";C%02x", siggnal);
4109 p += xsnprintf (p, endp - p, ";c");
4111 if (remote_multi_process_p (rs) && ptid_is_pid (ptid))
4115 /* All (-1) threads of process. */
4116 nptid = ptid_build (ptid_get_pid (ptid), 0, -1);
4118 p += xsnprintf (p, endp - p, ":");
4119 p = write_ptid (p, endp, nptid);
4121 else if (!ptid_equal (ptid, minus_one_ptid))
4123 p += xsnprintf (p, endp - p, ":");
4124 p = write_ptid (p, endp, ptid);
4130 /* Resume the remote inferior by using a "vCont" packet. The thread
4131 to be resumed is PTID; STEP and SIGGNAL indicate whether the
4132 resumed thread should be single-stepped and/or signalled. If PTID
4133 equals minus_one_ptid, then all threads are resumed; the thread to
4134 be stepped and/or signalled is given in the global INFERIOR_PTID.
4135 This function returns non-zero iff it resumes the inferior.
4137 This function issues a strict subset of all possible vCont commands at the
4141 remote_vcont_resume (ptid_t ptid, int step, enum target_signal siggnal)
4143 struct remote_state *rs = get_remote_state ();
4147 if (remote_protocol_packets[PACKET_vCont].support == PACKET_SUPPORT_UNKNOWN)
4148 remote_vcont_probe (rs);
4150 if (remote_protocol_packets[PACKET_vCont].support == PACKET_DISABLE)
4154 endp = rs->buf + get_remote_packet_size ();
4156 /* If we could generate a wider range of packets, we'd have to worry
4157 about overflowing BUF. Should there be a generic
4158 "multi-part-packet" packet? */
4160 p += xsnprintf (p, endp - p, "vCont");
4162 if (ptid_equal (ptid, magic_null_ptid))
4164 /* MAGIC_NULL_PTID means that we don't have any active threads,
4165 so we don't have any TID numbers the inferior will
4166 understand. Make sure to only send forms that do not specify
4168 p = append_resumption (p, endp, minus_one_ptid, step, siggnal);
4170 else if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid))
4172 /* Resume all threads (of all processes, or of a single
4173 process), with preference for INFERIOR_PTID. This assumes
4174 inferior_ptid belongs to the set of all threads we are about
4176 if (step || siggnal != TARGET_SIGNAL_0)
4178 /* Step inferior_ptid, with or without signal. */
4179 p = append_resumption (p, endp, inferior_ptid, step, siggnal);
4182 /* And continue others without a signal. */
4183 p = append_resumption (p, endp, ptid, /*step=*/ 0, TARGET_SIGNAL_0);
4187 /* Scheduler locking; resume only PTID. */
4188 p = append_resumption (p, endp, ptid, step, siggnal);
4191 gdb_assert (strlen (rs->buf) < get_remote_packet_size ());
4196 /* In non-stop, the stub replies to vCont with "OK". The stop
4197 reply will be reported asynchronously by means of a `%Stop'
4199 getpkt (&rs->buf, &rs->buf_size, 0);
4200 if (strcmp (rs->buf, "OK") != 0)
4201 error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf);
4207 /* Tell the remote machine to resume. */
4209 static enum target_signal last_sent_signal = TARGET_SIGNAL_0;
4211 static int last_sent_step;
4214 remote_resume (struct target_ops *ops,
4215 ptid_t ptid, int step, enum target_signal siggnal)
4217 struct remote_state *rs = get_remote_state ();
4220 last_sent_signal = siggnal;
4221 last_sent_step = step;
4223 /* Update the inferior on signals to silently pass, if they've changed. */
4224 remote_pass_signals ();
4226 /* The vCont packet doesn't need to specify threads via Hc. */
4227 /* No reverse support (yet) for vCont. */
4228 if (execution_direction != EXEC_REVERSE)
4229 if (remote_vcont_resume (ptid, step, siggnal))
4232 /* All other supported resume packets do use Hc, so set the continue
4234 if (ptid_equal (ptid, minus_one_ptid))
4235 set_continue_thread (any_thread_ptid);
4237 set_continue_thread (ptid);
4240 if (execution_direction == EXEC_REVERSE)
4242 /* We don't pass signals to the target in reverse exec mode. */
4243 if (info_verbose && siggnal != TARGET_SIGNAL_0)
4244 warning (" - Can't pass signal %d to target in reverse: ignored.\n",
4248 && remote_protocol_packets[PACKET_bs].support == PACKET_DISABLE)
4249 error (_("Remote reverse-step not supported."));
4251 && remote_protocol_packets[PACKET_bc].support == PACKET_DISABLE)
4252 error (_("Remote reverse-continue not supported."));
4254 strcpy (buf, step ? "bs" : "bc");
4256 else if (siggnal != TARGET_SIGNAL_0)
4258 buf[0] = step ? 'S' : 'C';
4259 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
4260 buf[2] = tohex (((int) siggnal) & 0xf);
4264 strcpy (buf, step ? "s" : "c");
4269 /* We are about to start executing the inferior, let's register it
4270 with the event loop. NOTE: this is the one place where all the
4271 execution commands end up. We could alternatively do this in each
4272 of the execution commands in infcmd.c. */
4273 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
4274 into infcmd.c in order to allow inferior function calls to work
4275 NOT asynchronously. */
4276 if (target_can_async_p ())
4277 target_async (inferior_event_handler, 0);
4279 /* We've just told the target to resume. The remote server will
4280 wait for the inferior to stop, and then send a stop reply. In
4281 the mean time, we can't start another command/query ourselves
4282 because the stub wouldn't be ready to process it. This applies
4283 only to the base all-stop protocol, however. In non-stop (which
4284 only supports vCont), the stub replies with an "OK", and is
4285 immediate able to process further serial input. */
4287 rs->waiting_for_stop_reply = 1;
4291 /* Set up the signal handler for SIGINT, while the target is
4292 executing, ovewriting the 'regular' SIGINT signal handler. */
4294 initialize_sigint_signal_handler (void)
4296 signal (SIGINT, handle_remote_sigint);
4299 /* Signal handler for SIGINT, while the target is executing. */
4301 handle_remote_sigint (int sig)
4303 signal (sig, handle_remote_sigint_twice);
4304 mark_async_signal_handler_wrapper (sigint_remote_token);
4307 /* Signal handler for SIGINT, installed after SIGINT has already been
4308 sent once. It will take effect the second time that the user sends
4311 handle_remote_sigint_twice (int sig)
4313 signal (sig, handle_remote_sigint);
4314 mark_async_signal_handler_wrapper (sigint_remote_twice_token);
4317 /* Perform the real interruption of the target execution, in response
4320 async_remote_interrupt (gdb_client_data arg)
4323 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
4325 target_stop (inferior_ptid);
4328 /* Perform interrupt, if the first attempt did not succeed. Just give
4329 up on the target alltogether. */
4331 async_remote_interrupt_twice (gdb_client_data arg)
4334 fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n");
4339 /* Reinstall the usual SIGINT handlers, after the target has
4342 cleanup_sigint_signal_handler (void *dummy)
4344 signal (SIGINT, handle_sigint);
4347 /* Send ^C to target to halt it. Target will respond, and send us a
4349 static void (*ofunc) (int);
4351 /* The command line interface's stop routine. This function is installed
4352 as a signal handler for SIGINT. The first time a user requests a
4353 stop, we call remote_stop to send a break or ^C. If there is no
4354 response from the target (it didn't stop when the user requested it),
4355 we ask the user if he'd like to detach from the target. */
4357 remote_interrupt (int signo)
4359 /* If this doesn't work, try more severe steps. */
4360 signal (signo, remote_interrupt_twice);
4362 gdb_call_async_signal_handler (sigint_remote_token, 1);
4365 /* The user typed ^C twice. */
4368 remote_interrupt_twice (int signo)
4370 signal (signo, ofunc);
4371 gdb_call_async_signal_handler (sigint_remote_twice_token, 1);
4372 signal (signo, remote_interrupt);
4375 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
4376 thread, all threads of a remote process, or all threads of all
4380 remote_stop_ns (ptid_t ptid)
4382 struct remote_state *rs = get_remote_state ();
4384 char *endp = rs->buf + get_remote_packet_size ();
4386 if (remote_protocol_packets[PACKET_vCont].support == PACKET_SUPPORT_UNKNOWN)
4387 remote_vcont_probe (rs);
4389 if (!rs->support_vCont_t)
4390 error (_("Remote server does not support stopping threads"));
4392 if (ptid_equal (ptid, minus_one_ptid)
4393 || (!remote_multi_process_p (rs) && ptid_is_pid (ptid)))
4394 p += xsnprintf (p, endp - p, "vCont;t");
4399 p += xsnprintf (p, endp - p, "vCont;t:");
4401 if (ptid_is_pid (ptid))
4402 /* All (-1) threads of process. */
4403 nptid = ptid_build (ptid_get_pid (ptid), 0, -1);
4406 /* Small optimization: if we already have a stop reply for
4407 this thread, no use in telling the stub we want this
4409 if (peek_stop_reply (ptid))
4415 p = write_ptid (p, endp, nptid);
4418 /* In non-stop, we get an immediate OK reply. The stop reply will
4419 come in asynchronously by notification. */
4421 getpkt (&rs->buf, &rs->buf_size, 0);
4422 if (strcmp (rs->buf, "OK") != 0)
4423 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid), rs->buf);
4426 /* All-stop version of target_stop. Sends a break or a ^C to stop the
4427 remote target. It is undefined which thread of which process
4428 reports the stop. */
4431 remote_stop_as (ptid_t ptid)
4433 struct remote_state *rs = get_remote_state ();
4435 rs->ctrlc_pending_p = 1;
4437 /* If the inferior is stopped already, but the core didn't know
4438 about it yet, just ignore the request. The cached wait status
4439 will be collected in remote_wait. */
4440 if (rs->cached_wait_status)
4443 /* Send interrupt_sequence to remote target. */
4444 send_interrupt_sequence ();
4447 /* This is the generic stop called via the target vector. When a target
4448 interrupt is requested, either by the command line or the GUI, we
4449 will eventually end up here. */
4452 remote_stop (ptid_t ptid)
4455 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
4458 remote_stop_ns (ptid);
4460 remote_stop_as (ptid);
4463 /* Ask the user what to do when an interrupt is received. */
4466 interrupt_query (void)
4468 target_terminal_ours ();
4470 if (target_can_async_p ())
4472 signal (SIGINT, handle_sigint);
4473 deprecated_throw_reason (RETURN_QUIT);
4477 if (query (_("Interrupted while waiting for the program.\n\
4478 Give up (and stop debugging it)? ")))
4481 deprecated_throw_reason (RETURN_QUIT);
4485 target_terminal_inferior ();
4488 /* Enable/disable target terminal ownership. Most targets can use
4489 terminal groups to control terminal ownership. Remote targets are
4490 different in that explicit transfer of ownership to/from GDB/target
4494 remote_terminal_inferior (void)
4496 if (!target_async_permitted)
4497 /* Nothing to do. */
4500 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
4501 idempotent. The event-loop GDB talking to an asynchronous target
4502 with a synchronous command calls this function from both
4503 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
4504 transfer the terminal to the target when it shouldn't this guard
4506 if (!remote_async_terminal_ours_p)
4508 delete_file_handler (input_fd);
4509 remote_async_terminal_ours_p = 0;
4510 initialize_sigint_signal_handler ();
4511 /* NOTE: At this point we could also register our selves as the
4512 recipient of all input. Any characters typed could then be
4513 passed on down to the target. */
4517 remote_terminal_ours (void)
4519 if (!target_async_permitted)
4520 /* Nothing to do. */
4523 /* See FIXME in remote_terminal_inferior. */
4524 if (remote_async_terminal_ours_p)
4526 cleanup_sigint_signal_handler (NULL);
4527 add_file_handler (input_fd, stdin_event_handler, 0);
4528 remote_async_terminal_ours_p = 1;
4532 remote_console_output (char *msg)
4536 for (p = msg; p[0] && p[1]; p += 2)
4539 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
4542 fputs_unfiltered (tb, gdb_stdtarg);
4544 gdb_flush (gdb_stdtarg);
4547 typedef struct cached_reg
4550 gdb_byte data[MAX_REGISTER_SIZE];
4553 DEF_VEC_O(cached_reg_t);
4557 struct stop_reply *next;
4561 struct target_waitstatus ws;
4563 VEC(cached_reg_t) *regcache;
4565 int stopped_by_watchpoint_p;
4566 CORE_ADDR watch_data_address;
4574 /* The list of already fetched and acknowledged stop events. */
4575 static struct stop_reply *stop_reply_queue;
4577 static struct stop_reply *
4578 stop_reply_xmalloc (void)
4580 struct stop_reply *r = XMALLOC (struct stop_reply);
4586 stop_reply_xfree (struct stop_reply *r)
4590 VEC_free (cached_reg_t, r->regcache);
4595 /* Discard all pending stop replies of inferior PID. If PID is -1,
4596 discard everything. */
4599 discard_pending_stop_replies (int pid)
4601 struct stop_reply *prev = NULL, *reply, *next;
4603 /* Discard the in-flight notification. */
4604 if (pending_stop_reply != NULL
4606 || ptid_get_pid (pending_stop_reply->ptid) == pid))
4608 stop_reply_xfree (pending_stop_reply);
4609 pending_stop_reply = NULL;
4612 /* Discard the stop replies we have already pulled with
4614 for (reply = stop_reply_queue; reply; reply = next)
4618 || ptid_get_pid (reply->ptid) == pid)
4620 if (reply == stop_reply_queue)
4621 stop_reply_queue = reply->next;
4623 prev->next = reply->next;
4625 stop_reply_xfree (reply);
4632 /* Cleanup wrapper. */
4635 do_stop_reply_xfree (void *arg)
4637 struct stop_reply *r = arg;
4638 stop_reply_xfree (r);
4641 /* Look for a queued stop reply belonging to PTID. If one is found,
4642 remove it from the queue, and return it. Returns NULL if none is
4643 found. If there are still queued events left to process, tell the
4644 event loop to get back to target_wait soon. */
4646 static struct stop_reply *
4647 queued_stop_reply (ptid_t ptid)
4649 struct stop_reply *it;
4650 struct stop_reply **it_link;
4652 it = stop_reply_queue;
4653 it_link = &stop_reply_queue;
4656 if (ptid_match (it->ptid, ptid))
4658 *it_link = it->next;
4663 it_link = &it->next;
4667 if (stop_reply_queue)
4668 /* There's still at least an event left. */
4669 mark_async_event_handler (remote_async_inferior_event_token);
4674 /* Push a fully parsed stop reply in the stop reply queue. Since we
4675 know that we now have at least one queued event left to pass to the
4676 core side, tell the event loop to get back to target_wait soon. */
4679 push_stop_reply (struct stop_reply *new_event)
4681 struct stop_reply *event;
4683 if (stop_reply_queue)
4685 for (event = stop_reply_queue;
4686 event && event->next;
4687 event = event->next)
4690 event->next = new_event;
4693 stop_reply_queue = new_event;
4695 mark_async_event_handler (remote_async_inferior_event_token);
4698 /* Returns true if we have a stop reply for PTID. */
4701 peek_stop_reply (ptid_t ptid)
4703 struct stop_reply *it;
4705 for (it = stop_reply_queue; it; it = it->next)
4706 if (ptid_equal (ptid, it->ptid))
4708 if (it->ws.kind == TARGET_WAITKIND_STOPPED)
4715 /* Parse the stop reply in BUF. Either the function succeeds, and the
4716 result is stored in EVENT, or throws an error. */
4719 remote_parse_stop_reply (char *buf, struct stop_reply *event)
4721 struct remote_arch_state *rsa = get_remote_arch_state ();
4725 event->ptid = null_ptid;
4726 event->ws.kind = TARGET_WAITKIND_IGNORE;
4727 event->ws.value.integer = 0;
4728 event->solibs_changed = 0;
4729 event->replay_event = 0;
4730 event->stopped_by_watchpoint_p = 0;
4731 event->regcache = NULL;
4736 case 'T': /* Status with PC, SP, FP, ... */
4737 /* Expedited reply, containing Signal, {regno, reg} repeat. */
4738 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
4740 n... = register number
4741 r... = register contents
4744 p = &buf[3]; /* after Txx */
4752 /* If the packet contains a register number, save it in
4753 pnum and set p1 to point to the character following it.
4754 Otherwise p1 points to p. */
4756 /* If this packet is an awatch packet, don't parse the 'a'
4757 as a register number. */
4759 if (strncmp (p, "awatch", strlen("awatch")) != 0
4760 && strncmp (p, "core", strlen ("core") != 0))
4762 /* Read the ``P'' register number. */
4763 pnum = strtol (p, &p_temp, 16);
4769 if (p1 == p) /* No register number present here. */
4771 p1 = strchr (p, ':');
4773 error (_("Malformed packet(a) (missing colon): %s\n\
4776 if (strncmp (p, "thread", p1 - p) == 0)
4777 event->ptid = read_ptid (++p1, &p);
4778 else if ((strncmp (p, "watch", p1 - p) == 0)
4779 || (strncmp (p, "rwatch", p1 - p) == 0)
4780 || (strncmp (p, "awatch", p1 - p) == 0))
4782 event->stopped_by_watchpoint_p = 1;
4783 p = unpack_varlen_hex (++p1, &addr);
4784 event->watch_data_address = (CORE_ADDR) addr;
4786 else if (strncmp (p, "library", p1 - p) == 0)
4790 while (*p_temp && *p_temp != ';')
4793 event->solibs_changed = 1;
4796 else if (strncmp (p, "replaylog", p1 - p) == 0)
4798 /* NO_HISTORY event.
4799 p1 will indicate "begin" or "end", but
4800 it makes no difference for now, so ignore it. */
4801 event->replay_event = 1;
4802 p_temp = strchr (p1 + 1, ';');
4806 else if (strncmp (p, "core", p1 - p) == 0)
4809 p = unpack_varlen_hex (++p1, &c);
4814 /* Silently skip unknown optional info. */
4815 p_temp = strchr (p1 + 1, ';');
4822 struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum);
4823 cached_reg_t cached_reg;
4828 error (_("Malformed packet(b) (missing colon): %s\n\
4834 error (_("Remote sent bad register number %s: %s\n\
4836 phex_nz (pnum, 0), p, buf);
4838 cached_reg.num = reg->regnum;
4840 fieldsize = hex2bin (p, cached_reg.data,
4841 register_size (target_gdbarch,
4844 if (fieldsize < register_size (target_gdbarch,
4846 warning (_("Remote reply is too short: %s"), buf);
4848 VEC_safe_push (cached_reg_t, event->regcache, &cached_reg);
4852 error (_("Remote register badly formatted: %s\nhere: %s"),
4857 case 'S': /* Old style status, just signal only. */
4858 if (event->solibs_changed)
4859 event->ws.kind = TARGET_WAITKIND_LOADED;
4860 else if (event->replay_event)
4861 event->ws.kind = TARGET_WAITKIND_NO_HISTORY;
4864 event->ws.kind = TARGET_WAITKIND_STOPPED;
4865 event->ws.value.sig = (enum target_signal)
4866 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
4869 case 'W': /* Target exited. */
4876 /* GDB used to accept only 2 hex chars here. Stubs should
4877 only send more if they detect GDB supports multi-process
4879 p = unpack_varlen_hex (&buf[1], &value);
4883 /* The remote process exited. */
4884 event->ws.kind = TARGET_WAITKIND_EXITED;
4885 event->ws.value.integer = value;
4889 /* The remote process exited with a signal. */
4890 event->ws.kind = TARGET_WAITKIND_SIGNALLED;
4891 event->ws.value.sig = (enum target_signal) value;
4894 /* If no process is specified, assume inferior_ptid. */
4895 pid = ptid_get_pid (inferior_ptid);
4904 else if (strncmp (p,
4905 "process:", sizeof ("process:") - 1) == 0)
4908 p += sizeof ("process:") - 1;
4909 unpack_varlen_hex (p, &upid);
4913 error (_("unknown stop reply packet: %s"), buf);
4916 error (_("unknown stop reply packet: %s"), buf);
4917 event->ptid = pid_to_ptid (pid);
4922 if (non_stop && ptid_equal (event->ptid, null_ptid))
4923 error (_("No process or thread specified in stop reply: %s"), buf);
4926 /* When the stub wants to tell GDB about a new stop reply, it sends a
4927 stop notification (%Stop). Those can come it at any time, hence,
4928 we have to make sure that any pending putpkt/getpkt sequence we're
4929 making is finished, before querying the stub for more events with
4930 vStopped. E.g., if we started a vStopped sequence immediatelly
4931 upon receiving the %Stop notification, something like this could
4939 1.6) <-- (registers reply to step #1.3)
4941 Obviously, the reply in step #1.6 would be unexpected to a vStopped
4944 To solve this, whenever we parse a %Stop notification sucessfully,
4945 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
4946 doing whatever we were doing:
4952 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
4953 2.5) <-- (registers reply to step #2.3)
4955 Eventualy after step #2.5, we return to the event loop, which
4956 notices there's an event on the
4957 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
4958 associated callback --- the function below. At this point, we're
4959 always safe to start a vStopped sequence. :
4962 2.7) <-- T05 thread:2
4968 remote_get_pending_stop_replies (void)
4970 struct remote_state *rs = get_remote_state ();
4972 if (pending_stop_reply)
4975 putpkt ("vStopped");
4977 /* Now we can rely on it. */
4978 push_stop_reply (pending_stop_reply);
4979 pending_stop_reply = NULL;
4983 getpkt (&rs->buf, &rs->buf_size, 0);
4984 if (strcmp (rs->buf, "OK") == 0)
4988 struct cleanup *old_chain;
4989 struct stop_reply *stop_reply = stop_reply_xmalloc ();
4991 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
4992 remote_parse_stop_reply (rs->buf, stop_reply);
4995 putpkt ("vStopped");
4997 if (stop_reply->ws.kind != TARGET_WAITKIND_IGNORE)
4999 /* Now we can rely on it. */
5000 discard_cleanups (old_chain);
5001 push_stop_reply (stop_reply);
5004 /* We got an unknown stop reply. */
5005 do_cleanups (old_chain);
5012 /* Called when it is decided that STOP_REPLY holds the info of the
5013 event that is to be returned to the core. This function always
5014 destroys STOP_REPLY. */
5017 process_stop_reply (struct stop_reply *stop_reply,
5018 struct target_waitstatus *status)
5021 struct thread_info *info;
5023 *status = stop_reply->ws;
5024 ptid = stop_reply->ptid;
5026 /* If no thread/process was reported by the stub, assume the current
5028 if (ptid_equal (ptid, null_ptid))
5029 ptid = inferior_ptid;
5031 if (status->kind != TARGET_WAITKIND_EXITED
5032 && status->kind != TARGET_WAITKIND_SIGNALLED)
5034 /* Expedited registers. */
5035 if (stop_reply->regcache)
5037 struct regcache *regcache
5038 = get_thread_arch_regcache (ptid, target_gdbarch);
5043 VEC_iterate(cached_reg_t, stop_reply->regcache, ix, reg);
5045 regcache_raw_supply (regcache, reg->num, reg->data);
5046 VEC_free (cached_reg_t, stop_reply->regcache);
5049 remote_stopped_by_watchpoint_p = stop_reply->stopped_by_watchpoint_p;
5050 remote_watch_data_address = stop_reply->watch_data_address;
5052 remote_notice_new_inferior (ptid, 0);
5053 demand_private_info (ptid)->core = stop_reply->core;
5056 stop_reply_xfree (stop_reply);
5060 /* The non-stop mode version of target_wait. */
5063 remote_wait_ns (ptid_t ptid, struct target_waitstatus *status, int options)
5065 struct remote_state *rs = get_remote_state ();
5066 struct stop_reply *stop_reply;
5069 /* If in non-stop mode, get out of getpkt even if a
5070 notification is received. */
5072 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
5079 case 'E': /* Error of some sort. */
5080 /* We're out of sync with the target now. Did it continue
5081 or not? We can't tell which thread it was in non-stop,
5082 so just ignore this. */
5083 warning (_("Remote failure reply: %s"), rs->buf);
5085 case 'O': /* Console output. */
5086 remote_console_output (rs->buf + 1);
5089 warning (_("Invalid remote reply: %s"), rs->buf);
5093 /* Acknowledge a pending stop reply that may have arrived in the
5095 if (pending_stop_reply != NULL)
5096 remote_get_pending_stop_replies ();
5098 /* If indeed we noticed a stop reply, we're done. */
5099 stop_reply = queued_stop_reply (ptid);
5100 if (stop_reply != NULL)
5101 return process_stop_reply (stop_reply, status);
5103 /* Still no event. If we're just polling for an event, then
5104 return to the event loop. */
5105 if (options & TARGET_WNOHANG)
5107 status->kind = TARGET_WAITKIND_IGNORE;
5108 return minus_one_ptid;
5111 /* Otherwise do a blocking wait. */
5112 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
5117 /* Wait until the remote machine stops, then return, storing status in
5118 STATUS just as `wait' would. */
5121 remote_wait_as (ptid_t ptid, struct target_waitstatus *status, int options)
5123 struct remote_state *rs = get_remote_state ();
5124 ptid_t event_ptid = null_ptid;
5126 struct stop_reply *stop_reply;
5130 status->kind = TARGET_WAITKIND_IGNORE;
5131 status->value.integer = 0;
5133 stop_reply = queued_stop_reply (ptid);
5134 if (stop_reply != NULL)
5135 return process_stop_reply (stop_reply, status);
5137 if (rs->cached_wait_status)
5138 /* Use the cached wait status, but only once. */
5139 rs->cached_wait_status = 0;
5144 if (!target_is_async_p ())
5146 ofunc = signal (SIGINT, remote_interrupt);
5147 /* If the user hit C-c before this packet, or between packets,
5148 pretend that it was hit right here. */
5152 remote_interrupt (SIGINT);
5156 /* FIXME: cagney/1999-09-27: If we're in async mode we should
5157 _never_ wait for ever -> test on target_is_async_p().
5158 However, before we do that we need to ensure that the caller
5159 knows how to take the target into/out of async mode. */
5160 ret = getpkt_sane (&rs->buf, &rs->buf_size, wait_forever_enabled_p);
5161 if (!target_is_async_p ())
5162 signal (SIGINT, ofunc);
5167 remote_stopped_by_watchpoint_p = 0;
5169 /* We got something. */
5170 rs->waiting_for_stop_reply = 0;
5172 /* Assume that the target has acknowledged Ctrl-C unless we receive
5173 an 'F' or 'O' packet. */
5174 if (buf[0] != 'F' && buf[0] != 'O')
5175 rs->ctrlc_pending_p = 0;
5179 case 'E': /* Error of some sort. */
5180 /* We're out of sync with the target now. Did it continue or
5181 not? Not is more likely, so report a stop. */
5182 warning (_("Remote failure reply: %s"), buf);
5183 status->kind = TARGET_WAITKIND_STOPPED;
5184 status->value.sig = TARGET_SIGNAL_0;
5186 case 'F': /* File-I/O request. */
5187 remote_fileio_request (buf, rs->ctrlc_pending_p);
5188 rs->ctrlc_pending_p = 0;
5190 case 'T': case 'S': case 'X': case 'W':
5192 struct stop_reply *stop_reply;
5193 struct cleanup *old_chain;
5195 stop_reply = stop_reply_xmalloc ();
5196 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
5197 remote_parse_stop_reply (buf, stop_reply);
5198 discard_cleanups (old_chain);
5199 event_ptid = process_stop_reply (stop_reply, status);
5202 case 'O': /* Console output. */
5203 remote_console_output (buf + 1);
5205 /* The target didn't really stop; keep waiting. */
5206 rs->waiting_for_stop_reply = 1;
5210 if (last_sent_signal != TARGET_SIGNAL_0)
5212 /* Zero length reply means that we tried 'S' or 'C' and the
5213 remote system doesn't support it. */
5214 target_terminal_ours_for_output ();
5216 ("Can't send signals to this remote system. %s not sent.\n",
5217 target_signal_to_name (last_sent_signal));
5218 last_sent_signal = TARGET_SIGNAL_0;
5219 target_terminal_inferior ();
5221 strcpy ((char *) buf, last_sent_step ? "s" : "c");
5222 putpkt ((char *) buf);
5224 /* We just told the target to resume, so a stop reply is in
5226 rs->waiting_for_stop_reply = 1;
5229 /* else fallthrough */
5231 warning (_("Invalid remote reply: %s"), buf);
5233 rs->waiting_for_stop_reply = 1;
5237 if (status->kind == TARGET_WAITKIND_IGNORE)
5239 /* Nothing interesting happened. If we're doing a non-blocking
5240 poll, we're done. Otherwise, go back to waiting. */
5241 if (options & TARGET_WNOHANG)
5242 return minus_one_ptid;
5246 else if (status->kind != TARGET_WAITKIND_EXITED
5247 && status->kind != TARGET_WAITKIND_SIGNALLED)
5249 if (!ptid_equal (event_ptid, null_ptid))
5250 record_currthread (event_ptid);
5252 event_ptid = inferior_ptid;
5255 /* A process exit. Invalidate our notion of current thread. */
5256 record_currthread (minus_one_ptid);
5261 /* Wait until the remote machine stops, then return, storing status in
5262 STATUS just as `wait' would. */
5265 remote_wait (struct target_ops *ops,
5266 ptid_t ptid, struct target_waitstatus *status, int options)
5271 event_ptid = remote_wait_ns (ptid, status, options);
5273 event_ptid = remote_wait_as (ptid, status, options);
5275 if (target_can_async_p ())
5277 /* If there are are events left in the queue tell the event loop
5279 if (stop_reply_queue)
5280 mark_async_event_handler (remote_async_inferior_event_token);
5286 /* Fetch a single register using a 'p' packet. */
5289 fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg)
5291 struct remote_state *rs = get_remote_state ();
5293 char regp[MAX_REGISTER_SIZE];
5296 if (remote_protocol_packets[PACKET_p].support == PACKET_DISABLE)
5299 if (reg->pnum == -1)
5304 p += hexnumstr (p, reg->pnum);
5307 getpkt (&rs->buf, &rs->buf_size, 0);
5311 switch (packet_ok (buf, &remote_protocol_packets[PACKET_p]))
5315 case PACKET_UNKNOWN:
5318 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
5319 gdbarch_register_name (get_regcache_arch (regcache),
5324 /* If this register is unfetchable, tell the regcache. */
5327 regcache_raw_supply (regcache, reg->regnum, NULL);
5331 /* Otherwise, parse and supply the value. */
5337 error (_("fetch_register_using_p: early buf termination"));
5339 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
5342 regcache_raw_supply (regcache, reg->regnum, regp);
5346 /* Fetch the registers included in the target's 'g' packet. */
5349 send_g_packet (void)
5351 struct remote_state *rs = get_remote_state ();
5354 sprintf (rs->buf, "g");
5355 remote_send (&rs->buf, &rs->buf_size);
5357 /* We can get out of synch in various cases. If the first character
5358 in the buffer is not a hex character, assume that has happened
5359 and try to fetch another packet to read. */
5360 while ((rs->buf[0] < '0' || rs->buf[0] > '9')
5361 && (rs->buf[0] < 'A' || rs->buf[0] > 'F')
5362 && (rs->buf[0] < 'a' || rs->buf[0] > 'f')
5363 && rs->buf[0] != 'x') /* New: unavailable register value. */
5366 fprintf_unfiltered (gdb_stdlog,
5367 "Bad register packet; fetching a new packet\n");
5368 getpkt (&rs->buf, &rs->buf_size, 0);
5371 buf_len = strlen (rs->buf);
5373 /* Sanity check the received packet. */
5374 if (buf_len % 2 != 0)
5375 error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf);
5381 process_g_packet (struct regcache *regcache)
5383 struct gdbarch *gdbarch = get_regcache_arch (regcache);
5384 struct remote_state *rs = get_remote_state ();
5385 struct remote_arch_state *rsa = get_remote_arch_state ();
5390 buf_len = strlen (rs->buf);
5392 /* Further sanity checks, with knowledge of the architecture. */
5393 if (buf_len > 2 * rsa->sizeof_g_packet)
5394 error (_("Remote 'g' packet reply is too long: %s"), rs->buf);
5396 /* Save the size of the packet sent to us by the target. It is used
5397 as a heuristic when determining the max size of packets that the
5398 target can safely receive. */
5399 if (rsa->actual_register_packet_size == 0)
5400 rsa->actual_register_packet_size = buf_len;
5402 /* If this is smaller than we guessed the 'g' packet would be,
5403 update our records. A 'g' reply that doesn't include a register's
5404 value implies either that the register is not available, or that
5405 the 'p' packet must be used. */
5406 if (buf_len < 2 * rsa->sizeof_g_packet)
5408 rsa->sizeof_g_packet = buf_len / 2;
5410 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
5412 if (rsa->regs[i].pnum == -1)
5415 if (rsa->regs[i].offset >= rsa->sizeof_g_packet)
5416 rsa->regs[i].in_g_packet = 0;
5418 rsa->regs[i].in_g_packet = 1;
5422 regs = alloca (rsa->sizeof_g_packet);
5424 /* Unimplemented registers read as all bits zero. */
5425 memset (regs, 0, rsa->sizeof_g_packet);
5427 /* Reply describes registers byte by byte, each byte encoded as two
5428 hex characters. Suck them all up, then supply them to the
5429 register cacheing/storage mechanism. */
5432 for (i = 0; i < rsa->sizeof_g_packet; i++)
5434 if (p[0] == 0 || p[1] == 0)
5435 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
5436 internal_error (__FILE__, __LINE__,
5437 "unexpected end of 'g' packet reply");
5439 if (p[0] == 'x' && p[1] == 'x')
5440 regs[i] = 0; /* 'x' */
5442 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
5448 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
5450 struct packet_reg *r = &rsa->regs[i];
5453 if (r->offset * 2 >= strlen (rs->buf))
5454 /* This shouldn't happen - we adjusted in_g_packet above. */
5455 internal_error (__FILE__, __LINE__,
5456 "unexpected end of 'g' packet reply");
5457 else if (rs->buf[r->offset * 2] == 'x')
5459 gdb_assert (r->offset * 2 < strlen (rs->buf));
5460 /* The register isn't available, mark it as such (at
5461 the same time setting the value to zero). */
5462 regcache_raw_supply (regcache, r->regnum, NULL);
5465 regcache_raw_supply (regcache, r->regnum,
5473 fetch_registers_using_g (struct regcache *regcache)
5476 process_g_packet (regcache);
5480 remote_fetch_registers (struct target_ops *ops,
5481 struct regcache *regcache, int regnum)
5483 struct remote_arch_state *rsa = get_remote_arch_state ();
5486 set_general_thread (inferior_ptid);
5490 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
5491 gdb_assert (reg != NULL);
5493 /* If this register might be in the 'g' packet, try that first -
5494 we are likely to read more than one register. If this is the
5495 first 'g' packet, we might be overly optimistic about its
5496 contents, so fall back to 'p'. */
5497 if (reg->in_g_packet)
5499 fetch_registers_using_g (regcache);
5500 if (reg->in_g_packet)
5504 if (fetch_register_using_p (regcache, reg))
5507 /* This register is not available. */
5508 regcache_raw_supply (regcache, reg->regnum, NULL);
5513 fetch_registers_using_g (regcache);
5515 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
5516 if (!rsa->regs[i].in_g_packet)
5517 if (!fetch_register_using_p (regcache, &rsa->regs[i]))
5519 /* This register is not available. */
5520 regcache_raw_supply (regcache, i, NULL);
5524 /* Prepare to store registers. Since we may send them all (using a
5525 'G' request), we have to read out the ones we don't want to change
5529 remote_prepare_to_store (struct regcache *regcache)
5531 struct remote_arch_state *rsa = get_remote_arch_state ();
5533 gdb_byte buf[MAX_REGISTER_SIZE];
5535 /* Make sure the entire registers array is valid. */
5536 switch (remote_protocol_packets[PACKET_P].support)
5538 case PACKET_DISABLE:
5539 case PACKET_SUPPORT_UNKNOWN:
5540 /* Make sure all the necessary registers are cached. */
5541 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
5542 if (rsa->regs[i].in_g_packet)
5543 regcache_raw_read (regcache, rsa->regs[i].regnum, buf);
5550 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
5551 packet was not recognized. */
5554 store_register_using_P (const struct regcache *regcache,
5555 struct packet_reg *reg)
5557 struct gdbarch *gdbarch = get_regcache_arch (regcache);
5558 struct remote_state *rs = get_remote_state ();
5559 /* Try storing a single register. */
5560 char *buf = rs->buf;
5561 gdb_byte regp[MAX_REGISTER_SIZE];
5564 if (remote_protocol_packets[PACKET_P].support == PACKET_DISABLE)
5567 if (reg->pnum == -1)
5570 xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0));
5571 p = buf + strlen (buf);
5572 regcache_raw_collect (regcache, reg->regnum, regp);
5573 bin2hex (regp, p, register_size (gdbarch, reg->regnum));
5575 getpkt (&rs->buf, &rs->buf_size, 0);
5577 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P]))
5582 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
5583 gdbarch_register_name (gdbarch, reg->regnum), rs->buf);
5584 case PACKET_UNKNOWN:
5587 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
5591 /* Store register REGNUM, or all registers if REGNUM == -1, from the
5592 contents of the register cache buffer. FIXME: ignores errors. */
5595 store_registers_using_G (const struct regcache *regcache)
5597 struct remote_state *rs = get_remote_state ();
5598 struct remote_arch_state *rsa = get_remote_arch_state ();
5602 /* Extract all the registers in the regcache copying them into a
5606 regs = alloca (rsa->sizeof_g_packet);
5607 memset (regs, 0, rsa->sizeof_g_packet);
5608 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
5610 struct packet_reg *r = &rsa->regs[i];
5612 regcache_raw_collect (regcache, r->regnum, regs + r->offset);
5616 /* Command describes registers byte by byte,
5617 each byte encoded as two hex characters. */
5620 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
5622 bin2hex (regs, p, rsa->sizeof_g_packet);
5624 getpkt (&rs->buf, &rs->buf_size, 0);
5625 if (packet_check_result (rs->buf) == PACKET_ERROR)
5626 error (_("Could not write registers; remote failure reply '%s'"),
5630 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
5631 of the register cache buffer. FIXME: ignores errors. */
5634 remote_store_registers (struct target_ops *ops,
5635 struct regcache *regcache, int regnum)
5637 struct remote_arch_state *rsa = get_remote_arch_state ();
5640 set_general_thread (inferior_ptid);
5644 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
5645 gdb_assert (reg != NULL);
5647 /* Always prefer to store registers using the 'P' packet if
5648 possible; we often change only a small number of registers.
5649 Sometimes we change a larger number; we'd need help from a
5650 higher layer to know to use 'G'. */
5651 if (store_register_using_P (regcache, reg))
5654 /* For now, don't complain if we have no way to write the
5655 register. GDB loses track of unavailable registers too
5656 easily. Some day, this may be an error. We don't have
5657 any way to read the register, either... */
5658 if (!reg->in_g_packet)
5661 store_registers_using_G (regcache);
5665 store_registers_using_G (regcache);
5667 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
5668 if (!rsa->regs[i].in_g_packet)
5669 if (!store_register_using_P (regcache, &rsa->regs[i]))
5670 /* See above for why we do not issue an error here. */
5675 /* Return the number of hex digits in num. */
5678 hexnumlen (ULONGEST num)
5682 for (i = 0; num != 0; i++)
5688 /* Set BUF to the minimum number of hex digits representing NUM. */
5691 hexnumstr (char *buf, ULONGEST num)
5693 int len = hexnumlen (num);
5694 return hexnumnstr (buf, num, len);
5698 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
5701 hexnumnstr (char *buf, ULONGEST num, int width)
5707 for (i = width - 1; i >= 0; i--)
5709 buf[i] = "0123456789abcdef"[(num & 0xf)];
5716 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
5719 remote_address_masked (CORE_ADDR addr)
5721 int address_size = remote_address_size;
5722 /* If "remoteaddresssize" was not set, default to target address size. */
5724 address_size = gdbarch_addr_bit (target_gdbarch);
5726 if (address_size > 0
5727 && address_size < (sizeof (ULONGEST) * 8))
5729 /* Only create a mask when that mask can safely be constructed
5730 in a ULONGEST variable. */
5732 mask = (mask << address_size) - 1;
5738 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
5739 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
5740 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
5741 (which may be more than *OUT_LEN due to escape characters). The
5742 total number of bytes in the output buffer will be at most
5746 remote_escape_output (const gdb_byte *buffer, int len,
5747 gdb_byte *out_buf, int *out_len,
5750 int input_index, output_index;
5753 for (input_index = 0; input_index < len; input_index++)
5755 gdb_byte b = buffer[input_index];
5757 if (b == '$' || b == '#' || b == '}')
5759 /* These must be escaped. */
5760 if (output_index + 2 > out_maxlen)
5762 out_buf[output_index++] = '}';
5763 out_buf[output_index++] = b ^ 0x20;
5767 if (output_index + 1 > out_maxlen)
5769 out_buf[output_index++] = b;
5773 *out_len = input_index;
5774 return output_index;
5777 /* Convert BUFFER, escaped data LEN bytes long, into binary data
5778 in OUT_BUF. Return the number of bytes written to OUT_BUF.
5779 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
5781 This function reverses remote_escape_output. It allows more
5782 escaped characters than that function does, in particular because
5783 '*' must be escaped to avoid the run-length encoding processing
5784 in reading packets. */
5787 remote_unescape_input (const gdb_byte *buffer, int len,
5788 gdb_byte *out_buf, int out_maxlen)
5790 int input_index, output_index;
5795 for (input_index = 0; input_index < len; input_index++)
5797 gdb_byte b = buffer[input_index];
5799 if (output_index + 1 > out_maxlen)
5801 warning (_("Received too much data from remote target;"
5802 " ignoring overflow."));
5803 return output_index;
5808 out_buf[output_index++] = b ^ 0x20;
5814 out_buf[output_index++] = b;
5818 error (_("Unmatched escape character in target response."));
5820 return output_index;
5823 /* Determine whether the remote target supports binary downloading.
5824 This is accomplished by sending a no-op memory write of zero length
5825 to the target at the specified address. It does not suffice to send
5826 the whole packet, since many stubs strip the eighth bit and
5827 subsequently compute a wrong checksum, which causes real havoc with
5830 NOTE: This can still lose if the serial line is not eight-bit
5831 clean. In cases like this, the user should clear "remote
5835 check_binary_download (CORE_ADDR addr)
5837 struct remote_state *rs = get_remote_state ();
5839 switch (remote_protocol_packets[PACKET_X].support)
5841 case PACKET_DISABLE:
5845 case PACKET_SUPPORT_UNKNOWN:
5851 p += hexnumstr (p, (ULONGEST) addr);
5853 p += hexnumstr (p, (ULONGEST) 0);
5857 putpkt_binary (rs->buf, (int) (p - rs->buf));
5858 getpkt (&rs->buf, &rs->buf_size, 0);
5860 if (rs->buf[0] == '\0')
5863 fprintf_unfiltered (gdb_stdlog,
5864 "binary downloading NOT suppported by target\n");
5865 remote_protocol_packets[PACKET_X].support = PACKET_DISABLE;
5870 fprintf_unfiltered (gdb_stdlog,
5871 "binary downloading suppported by target\n");
5872 remote_protocol_packets[PACKET_X].support = PACKET_ENABLE;
5879 /* Write memory data directly to the remote machine.
5880 This does not inform the data cache; the data cache uses this.
5881 HEADER is the starting part of the packet.
5882 MEMADDR is the address in the remote memory space.
5883 MYADDR is the address of the buffer in our space.
5884 LEN is the number of bytes.
5885 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
5886 should send data as binary ('X'), or hex-encoded ('M').
5888 The function creates packet of the form
5889 <HEADER><ADDRESS>,<LENGTH>:<DATA>
5891 where encoding of <DATA> is termined by PACKET_FORMAT.
5893 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
5896 Returns the number of bytes transferred, or 0 (setting errno) for
5897 error. Only transfer a single packet. */
5900 remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
5901 const gdb_byte *myaddr, int len,
5902 char packet_format, int use_length)
5904 struct remote_state *rs = get_remote_state ();
5914 if (packet_format != 'X' && packet_format != 'M')
5915 internal_error (__FILE__, __LINE__,
5916 "remote_write_bytes_aux: bad packet format");
5921 payload_size = get_memory_write_packet_size ();
5923 /* The packet buffer will be large enough for the payload;
5924 get_memory_packet_size ensures this. */
5927 /* Compute the size of the actual payload by subtracting out the
5928 packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
5930 payload_size -= strlen ("$,:#NN");
5932 /* The comma won't be used. */
5934 header_length = strlen (header);
5935 payload_size -= header_length;
5936 payload_size -= hexnumlen (memaddr);
5938 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
5940 strcat (rs->buf, header);
5941 p = rs->buf + strlen (header);
5943 /* Compute a best guess of the number of bytes actually transfered. */
5944 if (packet_format == 'X')
5946 /* Best guess at number of bytes that will fit. */
5947 todo = min (len, payload_size);
5949 payload_size -= hexnumlen (todo);
5950 todo = min (todo, payload_size);
5954 /* Num bytes that will fit. */
5955 todo = min (len, payload_size / 2);
5957 payload_size -= hexnumlen (todo);
5958 todo = min (todo, payload_size / 2);
5962 internal_error (__FILE__, __LINE__,
5963 _("minumum packet size too small to write data"));
5965 /* If we already need another packet, then try to align the end
5966 of this packet to a useful boundary. */
5967 if (todo > 2 * REMOTE_ALIGN_WRITES && todo < len)
5968 todo = ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr;
5970 /* Append "<memaddr>". */
5971 memaddr = remote_address_masked (memaddr);
5972 p += hexnumstr (p, (ULONGEST) memaddr);
5979 /* Append <len>. Retain the location/size of <len>. It may need to
5980 be adjusted once the packet body has been created. */
5982 plenlen = hexnumstr (p, (ULONGEST) todo);
5990 /* Append the packet body. */
5991 if (packet_format == 'X')
5993 /* Binary mode. Send target system values byte by byte, in
5994 increasing byte addresses. Only escape certain critical
5996 payload_length = remote_escape_output (myaddr, todo, p, &nr_bytes,
5999 /* If not all TODO bytes fit, then we'll need another packet. Make
6000 a second try to keep the end of the packet aligned. Don't do
6001 this if the packet is tiny. */
6002 if (nr_bytes < todo && nr_bytes > 2 * REMOTE_ALIGN_WRITES)
6006 new_nr_bytes = (((memaddr + nr_bytes) & ~(REMOTE_ALIGN_WRITES - 1))
6008 if (new_nr_bytes != nr_bytes)
6009 payload_length = remote_escape_output (myaddr, new_nr_bytes,
6014 p += payload_length;
6015 if (use_length && nr_bytes < todo)
6017 /* Escape chars have filled up the buffer prematurely,
6018 and we have actually sent fewer bytes than planned.
6019 Fix-up the length field of the packet. Use the same
6020 number of characters as before. */
6021 plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen);
6022 *plen = ':'; /* overwrite \0 from hexnumnstr() */
6027 /* Normal mode: Send target system values byte by byte, in
6028 increasing byte addresses. Each byte is encoded as a two hex
6030 nr_bytes = bin2hex (myaddr, p, todo);
6034 putpkt_binary (rs->buf, (int) (p - rs->buf));
6035 getpkt (&rs->buf, &rs->buf_size, 0);
6037 if (rs->buf[0] == 'E')
6039 /* There is no correspondance between what the remote protocol
6040 uses for errors and errno codes. We would like a cleaner way
6041 of representing errors (big enough to include errno codes,
6042 bfd_error codes, and others). But for now just return EIO. */
6047 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
6048 fewer bytes than we'd planned. */
6052 /* Write memory data directly to the remote machine.
6053 This does not inform the data cache; the data cache uses this.
6054 MEMADDR is the address in the remote memory space.
6055 MYADDR is the address of the buffer in our space.
6056 LEN is the number of bytes.
6058 Returns number of bytes transferred, or 0 (setting errno) for
6059 error. Only transfer a single packet. */
6062 remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
6064 char *packet_format = 0;
6066 /* Check whether the target supports binary download. */
6067 check_binary_download (memaddr);
6069 switch (remote_protocol_packets[PACKET_X].support)
6072 packet_format = "X";
6074 case PACKET_DISABLE:
6075 packet_format = "M";
6077 case PACKET_SUPPORT_UNKNOWN:
6078 internal_error (__FILE__, __LINE__,
6079 _("remote_write_bytes: bad internal state"));
6081 internal_error (__FILE__, __LINE__, _("bad switch"));
6084 return remote_write_bytes_aux (packet_format,
6085 memaddr, myaddr, len, packet_format[0], 1);
6088 /* Read memory data directly from the remote machine.
6089 This does not use the data cache; the data cache uses this.
6090 MEMADDR is the address in the remote memory space.
6091 MYADDR is the address of the buffer in our space.
6092 LEN is the number of bytes.
6094 Returns number of bytes transferred, or 0 for error. */
6096 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
6097 remote targets) shouldn't attempt to read the entire buffer.
6098 Instead it should read a single packet worth of data and then
6099 return the byte size of that packet to the caller. The caller (its
6100 caller and its callers caller ;-) already contains code for
6101 handling partial reads. */
6104 remote_read_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
6106 struct remote_state *rs = get_remote_state ();
6107 int max_buf_size; /* Max size of packet output buffer. */
6113 max_buf_size = get_memory_read_packet_size ();
6114 /* The packet buffer will be large enough for the payload;
6115 get_memory_packet_size ensures this. */
6124 todo = min (len, max_buf_size / 2); /* num bytes that will fit */
6126 /* construct "m"<memaddr>","<len>" */
6127 /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */
6128 memaddr = remote_address_masked (memaddr);
6131 p += hexnumstr (p, (ULONGEST) memaddr);
6133 p += hexnumstr (p, (ULONGEST) todo);
6137 getpkt (&rs->buf, &rs->buf_size, 0);
6139 if (rs->buf[0] == 'E'
6140 && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2])
6141 && rs->buf[3] == '\0')
6143 /* There is no correspondance between what the remote
6144 protocol uses for errors and errno codes. We would like
6145 a cleaner way of representing errors (big enough to
6146 include errno codes, bfd_error codes, and others). But
6147 for now just return EIO. */
6152 /* Reply describes memory byte by byte,
6153 each byte encoded as two hex characters. */
6156 if ((i = hex2bin (p, myaddr, todo)) < todo)
6158 /* Reply is short. This means that we were able to read
6159 only part of what we wanted to. */
6160 return i + (origlen - len);
6170 /* Remote notification handler. */
6173 handle_notification (char *buf, size_t length)
6175 if (strncmp (buf, "Stop:", 5) == 0)
6177 if (pending_stop_reply)
6179 /* We've already parsed the in-flight stop-reply, but the
6180 stub for some reason thought we didn't, possibly due to
6181 timeout on its side. Just ignore it. */
6183 fprintf_unfiltered (gdb_stdlog, "ignoring resent notification\n");
6187 struct cleanup *old_chain;
6188 struct stop_reply *reply = stop_reply_xmalloc ();
6189 old_chain = make_cleanup (do_stop_reply_xfree, reply);
6191 remote_parse_stop_reply (buf + 5, reply);
6193 discard_cleanups (old_chain);
6195 /* Be careful to only set it after parsing, since an error
6196 may be thrown then. */
6197 pending_stop_reply = reply;
6199 /* Notify the event loop there's a stop reply to acknowledge
6200 and that there may be more events to fetch. */
6201 mark_async_event_handler (remote_async_get_pending_events_token);
6204 fprintf_unfiltered (gdb_stdlog, "stop notification captured\n");
6208 /* We ignore notifications we don't recognize, for compatibility
6209 with newer stubs. */
6214 /* Read or write LEN bytes from inferior memory at MEMADDR,
6215 transferring to or from debugger address BUFFER. Write to inferior
6216 if SHOULD_WRITE is nonzero. Returns length of data written or
6217 read; 0 for error. TARGET is unused. */
6220 remote_xfer_memory (CORE_ADDR mem_addr, gdb_byte *buffer, int mem_len,
6221 int should_write, struct mem_attrib *attrib,
6222 struct target_ops *target)
6226 set_general_thread (inferior_ptid);
6229 res = remote_write_bytes (mem_addr, buffer, mem_len);
6231 res = remote_read_bytes (mem_addr, buffer, mem_len);
6236 /* Sends a packet with content determined by the printf format string
6237 FORMAT and the remaining arguments, then gets the reply. Returns
6238 whether the packet was a success, a failure, or unknown. */
6240 static enum packet_result
6241 remote_send_printf (const char *format, ...)
6243 struct remote_state *rs = get_remote_state ();
6244 int max_size = get_remote_packet_size ();
6247 va_start (ap, format);
6250 if (vsnprintf (rs->buf, max_size, format, ap) >= max_size)
6251 internal_error (__FILE__, __LINE__, "Too long remote packet.");
6253 if (putpkt (rs->buf) < 0)
6254 error (_("Communication problem with target."));
6257 getpkt (&rs->buf, &rs->buf_size, 0);
6259 return packet_check_result (rs->buf);
6263 restore_remote_timeout (void *p)
6265 int value = *(int *)p;
6266 remote_timeout = value;
6269 /* Flash writing can take quite some time. We'll set
6270 effectively infinite timeout for flash operations.
6271 In future, we'll need to decide on a better approach. */
6272 static const int remote_flash_timeout = 1000;
6275 remote_flash_erase (struct target_ops *ops,
6276 ULONGEST address, LONGEST length)
6278 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
6279 int saved_remote_timeout = remote_timeout;
6280 enum packet_result ret;
6282 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
6283 &saved_remote_timeout);
6284 remote_timeout = remote_flash_timeout;
6286 ret = remote_send_printf ("vFlashErase:%s,%s",
6287 phex (address, addr_size),
6291 case PACKET_UNKNOWN:
6292 error (_("Remote target does not support flash erase"));
6294 error (_("Error erasing flash with vFlashErase packet"));
6299 do_cleanups (back_to);
6303 remote_flash_write (struct target_ops *ops,
6304 ULONGEST address, LONGEST length,
6305 const gdb_byte *data)
6307 int saved_remote_timeout = remote_timeout;
6309 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
6310 &saved_remote_timeout);
6312 remote_timeout = remote_flash_timeout;
6313 ret = remote_write_bytes_aux ("vFlashWrite:", address, data, length, 'X', 0);
6314 do_cleanups (back_to);
6320 remote_flash_done (struct target_ops *ops)
6322 int saved_remote_timeout = remote_timeout;
6324 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
6325 &saved_remote_timeout);
6327 remote_timeout = remote_flash_timeout;
6328 ret = remote_send_printf ("vFlashDone");
6329 do_cleanups (back_to);
6333 case PACKET_UNKNOWN:
6334 error (_("Remote target does not support vFlashDone"));
6336 error (_("Error finishing flash operation"));
6343 remote_files_info (struct target_ops *ignore)
6345 puts_filtered ("Debugging a target over a serial line.\n");
6348 /* Stuff for dealing with the packets which are part of this protocol.
6349 See comment at top of file for details. */
6351 /* Read a single character from the remote end. */
6354 readchar (int timeout)
6358 ch = serial_readchar (remote_desc, timeout);
6363 switch ((enum serial_rc) ch)
6367 error (_("Remote connection closed"));
6370 perror_with_name (_("Remote communication error"));
6372 case SERIAL_TIMEOUT:
6378 /* Send the command in *BUF to the remote machine, and read the reply
6379 into *BUF. Report an error if we get an error reply. Resize
6380 *BUF using xrealloc if necessary to hold the result, and update
6384 remote_send (char **buf,
6388 getpkt (buf, sizeof_buf, 0);
6390 if ((*buf)[0] == 'E')
6391 error (_("Remote failure reply: %s"), *buf);
6394 /* Return a pointer to an xmalloc'ed string representing an escaped
6395 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
6396 etc. The caller is responsible for releasing the returned
6400 escape_buffer (const char *buf, int n)
6402 struct cleanup *old_chain;
6403 struct ui_file *stb;
6406 stb = mem_fileopen ();
6407 old_chain = make_cleanup_ui_file_delete (stb);
6409 fputstrn_unfiltered (buf, n, 0, stb);
6410 str = ui_file_xstrdup (stb, NULL);
6411 do_cleanups (old_chain);
6415 /* Display a null-terminated packet on stdout, for debugging, using C
6419 print_packet (char *buf)
6421 puts_filtered ("\"");
6422 fputstr_filtered (buf, '"', gdb_stdout);
6423 puts_filtered ("\"");
6429 return putpkt_binary (buf, strlen (buf));
6432 /* Send a packet to the remote machine, with error checking. The data
6433 of the packet is in BUF. The string in BUF can be at most
6434 get_remote_packet_size () - 5 to account for the $, # and checksum,
6435 and for a possible /0 if we are debugging (remote_debug) and want
6436 to print the sent packet as a string. */
6439 putpkt_binary (char *buf, int cnt)
6441 struct remote_state *rs = get_remote_state ();
6443 unsigned char csum = 0;
6444 char *buf2 = alloca (cnt + 6);
6450 /* Catch cases like trying to read memory or listing threads while
6451 we're waiting for a stop reply. The remote server wouldn't be
6452 ready to handle this request, so we'd hang and timeout. We don't
6453 have to worry about this in synchronous mode, because in that
6454 case it's not possible to issue a command while the target is
6455 running. This is not a problem in non-stop mode, because in that
6456 case, the stub is always ready to process serial input. */
6457 if (!non_stop && target_can_async_p () && rs->waiting_for_stop_reply)
6458 error (_("Cannot execute this command while the target is running."));
6460 /* We're sending out a new packet. Make sure we don't look at a
6461 stale cached response. */
6462 rs->cached_wait_status = 0;
6464 /* Copy the packet into buffer BUF2, encapsulating it
6465 and giving it a checksum. */
6470 for (i = 0; i < cnt; i++)
6476 *p++ = tohex ((csum >> 4) & 0xf);
6477 *p++ = tohex (csum & 0xf);
6479 /* Send it over and over until we get a positive ack. */
6483 int started_error_output = 0;
6487 struct cleanup *old_chain;
6491 str = escape_buffer (buf2, p - buf2);
6492 old_chain = make_cleanup (xfree, str);
6493 fprintf_unfiltered (gdb_stdlog, "Sending packet: %s...", str);
6494 gdb_flush (gdb_stdlog);
6495 do_cleanups (old_chain);
6497 if (serial_write (remote_desc, buf2, p - buf2))
6498 perror_with_name (_("putpkt: write failed"));
6500 /* If this is a no acks version of the remote protocol, send the
6501 packet and move on. */
6505 /* Read until either a timeout occurs (-2) or '+' is read.
6506 Handle any notification that arrives in the mean time. */
6509 ch = readchar (remote_timeout);
6517 case SERIAL_TIMEOUT:
6520 if (started_error_output)
6522 putchar_unfiltered ('\n');
6523 started_error_output = 0;
6532 fprintf_unfiltered (gdb_stdlog, "Ack\n");
6536 fprintf_unfiltered (gdb_stdlog, "Nak\n");
6537 case SERIAL_TIMEOUT:
6541 break; /* Retransmit buffer. */
6545 fprintf_unfiltered (gdb_stdlog,
6546 "Packet instead of Ack, ignoring it\n");
6547 /* It's probably an old response sent because an ACK
6548 was lost. Gobble up the packet and ack it so it
6549 doesn't get retransmitted when we resend this
6552 serial_write (remote_desc, "+", 1);
6553 continue; /* Now, go look for +. */
6560 /* If we got a notification, handle it, and go back to looking
6562 /* We've found the start of a notification. Now
6563 collect the data. */
6564 val = read_frame (&rs->buf, &rs->buf_size);
6569 struct cleanup *old_chain;
6572 str = escape_buffer (rs->buf, val);
6573 old_chain = make_cleanup (xfree, str);
6574 fprintf_unfiltered (gdb_stdlog,
6575 " Notification received: %s\n",
6577 do_cleanups (old_chain);
6579 handle_notification (rs->buf, val);
6580 /* We're in sync now, rewait for the ack. */
6587 if (!started_error_output)
6589 started_error_output = 1;
6590 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
6592 fputc_unfiltered (ch & 0177, gdb_stdlog);
6593 fprintf_unfiltered (gdb_stdlog, "%s", rs->buf);
6602 if (!started_error_output)
6604 started_error_output = 1;
6605 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
6607 fputc_unfiltered (ch & 0177, gdb_stdlog);
6611 break; /* Here to retransmit. */
6615 /* This is wrong. If doing a long backtrace, the user should be
6616 able to get out next time we call QUIT, without anything as
6617 violent as interrupt_query. If we want to provide a way out of
6618 here without getting to the next QUIT, it should be based on
6619 hitting ^C twice as in remote_wait. */
6630 /* Come here after finding the start of a frame when we expected an
6631 ack. Do our best to discard the rest of this packet. */
6640 c = readchar (remote_timeout);
6643 case SERIAL_TIMEOUT:
6644 /* Nothing we can do. */
6647 /* Discard the two bytes of checksum and stop. */
6648 c = readchar (remote_timeout);
6650 c = readchar (remote_timeout);
6653 case '*': /* Run length encoding. */
6654 /* Discard the repeat count. */
6655 c = readchar (remote_timeout);
6660 /* A regular character. */
6666 /* Come here after finding the start of the frame. Collect the rest
6667 into *BUF, verifying the checksum, length, and handling run-length
6668 compression. NUL terminate the buffer. If there is not enough room,
6669 expand *BUF using xrealloc.
6671 Returns -1 on error, number of characters in buffer (ignoring the
6672 trailing NULL) on success. (could be extended to return one of the
6673 SERIAL status indications). */
6676 read_frame (char **buf_p,
6683 struct remote_state *rs = get_remote_state ();
6690 c = readchar (remote_timeout);
6693 case SERIAL_TIMEOUT:
6695 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
6699 fputs_filtered ("Saw new packet start in middle of old one\n",
6701 return -1; /* Start a new packet, count retries. */
6704 unsigned char pktcsum;
6710 check_0 = readchar (remote_timeout);
6712 check_1 = readchar (remote_timeout);
6714 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
6717 fputs_filtered ("Timeout in checksum, retrying\n",
6721 else if (check_0 < 0 || check_1 < 0)
6724 fputs_filtered ("Communication error in checksum\n",
6729 /* Don't recompute the checksum; with no ack packets we
6730 don't have any way to indicate a packet retransmission
6735 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
6736 if (csum == pktcsum)
6741 struct cleanup *old_chain;
6744 str = escape_buffer (buf, bc);
6745 old_chain = make_cleanup (xfree, str);
6746 fprintf_unfiltered (gdb_stdlog,
6748 Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n",
6749 pktcsum, csum, str);
6750 do_cleanups (old_chain);
6752 /* Number of characters in buffer ignoring trailing
6756 case '*': /* Run length encoding. */
6761 c = readchar (remote_timeout);
6763 repeat = c - ' ' + 3; /* Compute repeat count. */
6765 /* The character before ``*'' is repeated. */
6767 if (repeat > 0 && repeat <= 255 && bc > 0)
6769 if (bc + repeat - 1 >= *sizeof_buf - 1)
6771 /* Make some more room in the buffer. */
6772 *sizeof_buf += repeat;
6773 *buf_p = xrealloc (*buf_p, *sizeof_buf);
6777 memset (&buf[bc], buf[bc - 1], repeat);
6783 printf_filtered (_("Invalid run length encoding: %s\n"), buf);
6787 if (bc >= *sizeof_buf - 1)
6789 /* Make some more room in the buffer. */
6791 *buf_p = xrealloc (*buf_p, *sizeof_buf);
6802 /* Read a packet from the remote machine, with error checking, and
6803 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6804 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6805 rather than timing out; this is used (in synchronous mode) to wait
6806 for a target that is is executing user code to stop. */
6807 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
6808 don't have to change all the calls to getpkt to deal with the
6809 return value, because at the moment I don't know what the right
6810 thing to do it for those. */
6818 timed_out = getpkt_sane (buf, sizeof_buf, forever);
6822 /* Read a packet from the remote machine, with error checking, and
6823 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6824 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6825 rather than timing out; this is used (in synchronous mode) to wait
6826 for a target that is is executing user code to stop. If FOREVER ==
6827 0, this function is allowed to time out gracefully and return an
6828 indication of this to the caller. Otherwise return the number of
6829 bytes read. If EXPECTING_NOTIF, consider receiving a notification
6830 enough reason to return to the caller. */
6833 getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf, int forever,
6834 int expecting_notif)
6836 struct remote_state *rs = get_remote_state ();
6842 /* We're reading a new response. Make sure we don't look at a
6843 previously cached response. */
6844 rs->cached_wait_status = 0;
6846 strcpy (*buf, "timeout");
6849 timeout = watchdog > 0 ? watchdog : -1;
6850 else if (expecting_notif)
6851 timeout = 0; /* There should already be a char in the buffer. If
6854 timeout = remote_timeout;
6858 /* Process any number of notifications, and then return when
6862 /* If we get a timeout or bad checksm, retry up to MAX_TRIES
6864 for (tries = 1; tries <= MAX_TRIES; tries++)
6866 /* This can loop forever if the remote side sends us
6867 characters continuously, but if it pauses, we'll get
6868 SERIAL_TIMEOUT from readchar because of timeout. Then
6869 we'll count that as a retry.
6871 Note that even when forever is set, we will only wait
6872 forever prior to the start of a packet. After that, we
6873 expect characters to arrive at a brisk pace. They should
6874 show up within remote_timeout intervals. */
6876 c = readchar (timeout);
6877 while (c != SERIAL_TIMEOUT && c != '$' && c != '%');
6879 if (c == SERIAL_TIMEOUT)
6881 if (expecting_notif)
6882 return -1; /* Don't complain, it's normal to not get
6883 anything in this case. */
6885 if (forever) /* Watchdog went off? Kill the target. */
6889 error (_("Watchdog timeout has expired. Target detached."));
6892 fputs_filtered ("Timed out.\n", gdb_stdlog);
6896 /* We've found the start of a packet or notification.
6897 Now collect the data. */
6898 val = read_frame (buf, sizeof_buf);
6903 serial_write (remote_desc, "-", 1);
6906 if (tries > MAX_TRIES)
6908 /* We have tried hard enough, and just can't receive the
6909 packet/notification. Give up. */
6910 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
6912 /* Skip the ack char if we're in no-ack mode. */
6913 if (!rs->noack_mode)
6914 serial_write (remote_desc, "+", 1);
6918 /* If we got an ordinary packet, return that to our caller. */
6923 struct cleanup *old_chain;
6926 str = escape_buffer (*buf, val);
6927 old_chain = make_cleanup (xfree, str);
6928 fprintf_unfiltered (gdb_stdlog, "Packet received: %s\n", str);
6929 do_cleanups (old_chain);
6932 /* Skip the ack char if we're in no-ack mode. */
6933 if (!rs->noack_mode)
6934 serial_write (remote_desc, "+", 1);
6938 /* If we got a notification, handle it, and go back to looking
6942 gdb_assert (c == '%');
6946 struct cleanup *old_chain;
6949 str = escape_buffer (*buf, val);
6950 old_chain = make_cleanup (xfree, str);
6951 fprintf_unfiltered (gdb_stdlog,
6952 " Notification received: %s\n",
6954 do_cleanups (old_chain);
6957 handle_notification (*buf, val);
6959 /* Notifications require no acknowledgement. */
6961 if (expecting_notif)
6968 getpkt_sane (char **buf, long *sizeof_buf, int forever)
6970 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 0);
6974 getpkt_or_notif_sane (char **buf, long *sizeof_buf, int forever)
6976 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 1);
6981 remote_kill (struct target_ops *ops)
6983 /* Use catch_errors so the user can quit from gdb even when we
6984 aren't on speaking terms with the remote system. */
6985 catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
6987 /* Don't wait for it to die. I'm not really sure it matters whether
6988 we do or not. For the existing stubs, kill is a noop. */
6989 target_mourn_inferior ();
6993 remote_vkill (int pid, struct remote_state *rs)
6995 if (remote_protocol_packets[PACKET_vKill].support == PACKET_DISABLE)
6998 /* Tell the remote target to detach. */
6999 sprintf (rs->buf, "vKill;%x", pid);
7001 getpkt (&rs->buf, &rs->buf_size, 0);
7003 if (packet_ok (rs->buf,
7004 &remote_protocol_packets[PACKET_vKill]) == PACKET_OK)
7006 else if (remote_protocol_packets[PACKET_vKill].support == PACKET_DISABLE)
7013 extended_remote_kill (struct target_ops *ops)
7016 int pid = ptid_get_pid (inferior_ptid);
7017 struct remote_state *rs = get_remote_state ();
7019 res = remote_vkill (pid, rs);
7020 if (res == -1 && !remote_multi_process_p (rs))
7022 /* Don't try 'k' on a multi-process aware stub -- it has no way
7023 to specify the pid. */
7027 getpkt (&rs->buf, &rs->buf_size, 0);
7028 if (rs->buf[0] != 'O' || rs->buf[0] != 'K')
7031 /* Don't wait for it to die. I'm not really sure it matters whether
7032 we do or not. For the existing stubs, kill is a noop. */
7038 error (_("Can't kill process"));
7040 target_mourn_inferior ();
7044 remote_mourn (struct target_ops *ops)
7046 remote_mourn_1 (ops);
7049 /* Worker function for remote_mourn. */
7051 remote_mourn_1 (struct target_ops *target)
7053 unpush_target (target);
7055 /* remote_close takes care of doing most of the clean up. */
7056 generic_mourn_inferior ();
7060 extended_remote_mourn_1 (struct target_ops *target)
7062 struct remote_state *rs = get_remote_state ();
7064 /* In case we got here due to an error, but we're going to stay
7066 rs->waiting_for_stop_reply = 0;
7068 /* We're no longer interested in these events. */
7069 discard_pending_stop_replies (ptid_get_pid (inferior_ptid));
7071 /* If the current general thread belonged to the process we just
7072 detached from or has exited, the remote side current general
7073 thread becomes undefined. Considering a case like this:
7075 - We just got here due to a detach.
7076 - The process that we're detaching from happens to immediately
7077 report a global breakpoint being hit in non-stop mode, in the
7078 same thread we had selected before.
7079 - GDB attaches to this process again.
7080 - This event happens to be the next event we handle.
7082 GDB would consider that the current general thread didn't need to
7083 be set on the stub side (with Hg), since for all it knew,
7084 GENERAL_THREAD hadn't changed.
7086 Notice that although in all-stop mode, the remote server always
7087 sets the current thread to the thread reporting the stop event,
7088 that doesn't happen in non-stop mode; in non-stop, the stub *must
7089 not* change the current thread when reporting a breakpoint hit,
7090 due to the decoupling of event reporting and event handling.
7092 To keep things simple, we always invalidate our notion of the
7094 record_currthread (minus_one_ptid);
7096 /* Unlike "target remote", we do not want to unpush the target; then
7097 the next time the user says "run", we won't be connected. */
7099 /* Call common code to mark the inferior as not running. */
7100 generic_mourn_inferior ();
7102 if (!have_inferiors ())
7104 if (!remote_multi_process_p (rs))
7106 /* Check whether the target is running now - some remote stubs
7107 automatically restart after kill. */
7109 getpkt (&rs->buf, &rs->buf_size, 0);
7111 if (rs->buf[0] == 'S' || rs->buf[0] == 'T')
7113 /* Assume that the target has been restarted. Set inferior_ptid
7114 so that bits of core GDB realizes there's something here, e.g.,
7115 so that the user can say "kill" again. */
7116 inferior_ptid = magic_null_ptid;
7123 extended_remote_mourn (struct target_ops *ops)
7125 extended_remote_mourn_1 (ops);
7129 extended_remote_run (char *args)
7131 struct remote_state *rs = get_remote_state ();
7134 /* If the user has disabled vRun support, or we have detected that
7135 support is not available, do not try it. */
7136 if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE)
7139 strcpy (rs->buf, "vRun;");
7140 len = strlen (rs->buf);
7142 if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ())
7143 error (_("Remote file name too long for run packet"));
7144 len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len, 0);
7146 gdb_assert (args != NULL);
7149 struct cleanup *back_to;
7153 argv = gdb_buildargv (args);
7154 back_to = make_cleanup ((void (*) (void *)) freeargv, argv);
7155 for (i = 0; argv[i] != NULL; i++)
7157 if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ())
7158 error (_("Argument list too long for run packet"));
7159 rs->buf[len++] = ';';
7160 len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len, 0);
7162 do_cleanups (back_to);
7165 rs->buf[len++] = '\0';
7168 getpkt (&rs->buf, &rs->buf_size, 0);
7170 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]) == PACKET_OK)
7172 /* We have a wait response; we don't need it, though. All is well. */
7175 else if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE)
7176 /* It wasn't disabled before, but it is now. */
7180 if (remote_exec_file[0] == '\0')
7181 error (_("Running the default executable on the remote target failed; "
7182 "try \"set remote exec-file\"?"));
7184 error (_("Running \"%s\" on the remote target failed"),
7189 /* In the extended protocol we want to be able to do things like
7190 "run" and have them basically work as expected. So we need
7191 a special create_inferior function. We support changing the
7192 executable file and the command line arguments, but not the
7196 extended_remote_create_inferior_1 (char *exec_file, char *args,
7197 char **env, int from_tty)
7199 /* If running asynchronously, register the target file descriptor
7200 with the event loop. */
7201 if (target_can_async_p ())
7202 target_async (inferior_event_handler, 0);
7204 /* Now restart the remote server. */
7205 if (extended_remote_run (args) == -1)
7207 /* vRun was not supported. Fail if we need it to do what the
7209 if (remote_exec_file[0])
7210 error (_("Remote target does not support \"set remote exec-file\""));
7212 error (_("Remote target does not support \"set args\" or run <ARGS>"));
7214 /* Fall back to "R". */
7215 extended_remote_restart ();
7218 if (!have_inferiors ())
7220 /* Clean up from the last time we ran, before we mark the target
7221 running again. This will mark breakpoints uninserted, and
7222 get_offsets may insert breakpoints. */
7223 init_thread_list ();
7224 init_wait_for_inferior ();
7227 /* Now mark the inferior as running before we do anything else. */
7228 inferior_ptid = magic_null_ptid;
7230 /* Now, if we have thread information, update inferior_ptid. */
7231 inferior_ptid = remote_current_thread (inferior_ptid);
7233 remote_add_inferior (ptid_get_pid (inferior_ptid), 0);
7234 add_thread_silent (inferior_ptid);
7236 /* Get updated offsets, if the stub uses qOffsets. */
7241 extended_remote_create_inferior (struct target_ops *ops,
7242 char *exec_file, char *args,
7243 char **env, int from_tty)
7245 extended_remote_create_inferior_1 (exec_file, args, env, from_tty);
7249 /* Insert a breakpoint. On targets that have software breakpoint
7250 support, we ask the remote target to do the work; on targets
7251 which don't, we insert a traditional memory breakpoint. */
7254 remote_insert_breakpoint (struct gdbarch *gdbarch,
7255 struct bp_target_info *bp_tgt)
7257 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
7258 If it succeeds, then set the support to PACKET_ENABLE. If it
7259 fails, and the user has explicitly requested the Z support then
7260 report an error, otherwise, mark it disabled and go on. */
7262 if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE)
7264 CORE_ADDR addr = bp_tgt->placed_address;
7265 struct remote_state *rs;
7269 gdbarch_remote_breakpoint_from_pc (gdbarch, &addr, &bpsize);
7271 rs = get_remote_state ();
7277 addr = (ULONGEST) remote_address_masked (addr);
7278 p += hexnumstr (p, addr);
7279 sprintf (p, ",%d", bpsize);
7282 getpkt (&rs->buf, &rs->buf_size, 0);
7284 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0]))
7289 bp_tgt->placed_address = addr;
7290 bp_tgt->placed_size = bpsize;
7292 case PACKET_UNKNOWN:
7297 return memory_insert_breakpoint (gdbarch, bp_tgt);
7301 remote_remove_breakpoint (struct gdbarch *gdbarch,
7302 struct bp_target_info *bp_tgt)
7304 CORE_ADDR addr = bp_tgt->placed_address;
7305 struct remote_state *rs = get_remote_state ();
7307 if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE)
7315 addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
7316 p += hexnumstr (p, addr);
7317 sprintf (p, ",%d", bp_tgt->placed_size);
7320 getpkt (&rs->buf, &rs->buf_size, 0);
7322 return (rs->buf[0] == 'E');
7325 return memory_remove_breakpoint (gdbarch, bp_tgt);
7329 watchpoint_to_Z_packet (int type)
7334 return Z_PACKET_WRITE_WP;
7337 return Z_PACKET_READ_WP;
7340 return Z_PACKET_ACCESS_WP;
7343 internal_error (__FILE__, __LINE__,
7344 _("hw_bp_to_z: bad watchpoint type %d"), type);
7349 remote_insert_watchpoint (CORE_ADDR addr, int len, int type)
7351 struct remote_state *rs = get_remote_state ();
7353 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
7355 if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE)
7358 sprintf (rs->buf, "Z%x,", packet);
7359 p = strchr (rs->buf, '\0');
7360 addr = remote_address_masked (addr);
7361 p += hexnumstr (p, (ULONGEST) addr);
7362 sprintf (p, ",%x", len);
7365 getpkt (&rs->buf, &rs->buf_size, 0);
7367 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
7371 case PACKET_UNKNOWN:
7376 internal_error (__FILE__, __LINE__,
7377 _("remote_insert_watchpoint: reached end of function"));
7382 remote_remove_watchpoint (CORE_ADDR addr, int len, int type)
7384 struct remote_state *rs = get_remote_state ();
7386 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
7388 if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE)
7391 sprintf (rs->buf, "z%x,", packet);
7392 p = strchr (rs->buf, '\0');
7393 addr = remote_address_masked (addr);
7394 p += hexnumstr (p, (ULONGEST) addr);
7395 sprintf (p, ",%x", len);
7397 getpkt (&rs->buf, &rs->buf_size, 0);
7399 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
7402 case PACKET_UNKNOWN:
7407 internal_error (__FILE__, __LINE__,
7408 _("remote_remove_watchpoint: reached end of function"));
7412 int remote_hw_watchpoint_limit = -1;
7413 int remote_hw_breakpoint_limit = -1;
7416 remote_check_watch_resources (int type, int cnt, int ot)
7418 if (type == bp_hardware_breakpoint)
7420 if (remote_hw_breakpoint_limit == 0)
7422 else if (remote_hw_breakpoint_limit < 0)
7424 else if (cnt <= remote_hw_breakpoint_limit)
7429 if (remote_hw_watchpoint_limit == 0)
7431 else if (remote_hw_watchpoint_limit < 0)
7435 else if (cnt <= remote_hw_watchpoint_limit)
7442 remote_stopped_by_watchpoint (void)
7444 return remote_stopped_by_watchpoint_p;
7448 remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
7451 if (remote_stopped_by_watchpoint ())
7453 *addr_p = remote_watch_data_address;
7462 remote_insert_hw_breakpoint (struct gdbarch *gdbarch,
7463 struct bp_target_info *bp_tgt)
7466 struct remote_state *rs;
7469 /* The length field should be set to the size of a breakpoint
7470 instruction, even though we aren't inserting one ourselves. */
7472 gdbarch_remote_breakpoint_from_pc
7473 (gdbarch, &bp_tgt->placed_address, &bp_tgt->placed_size);
7475 if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
7478 rs = get_remote_state ();
7485 addr = remote_address_masked (bp_tgt->placed_address);
7486 p += hexnumstr (p, (ULONGEST) addr);
7487 sprintf (p, ",%x", bp_tgt->placed_size);
7490 getpkt (&rs->buf, &rs->buf_size, 0);
7492 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
7495 case PACKET_UNKNOWN:
7500 internal_error (__FILE__, __LINE__,
7501 _("remote_insert_hw_breakpoint: reached end of function"));
7506 remote_remove_hw_breakpoint (struct gdbarch *gdbarch,
7507 struct bp_target_info *bp_tgt)
7510 struct remote_state *rs = get_remote_state ();
7513 if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
7520 addr = remote_address_masked (bp_tgt->placed_address);
7521 p += hexnumstr (p, (ULONGEST) addr);
7522 sprintf (p, ",%x", bp_tgt->placed_size);
7525 getpkt (&rs->buf, &rs->buf_size, 0);
7527 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
7530 case PACKET_UNKNOWN:
7535 internal_error (__FILE__, __LINE__,
7536 _("remote_remove_hw_breakpoint: reached end of function"));
7539 /* Table used by the crc32 function to calcuate the checksum. */
7541 static unsigned long crc32_table[256] =
7544 static unsigned long
7545 crc32 (unsigned char *buf, int len, unsigned int crc)
7547 if (!crc32_table[1])
7549 /* Initialize the CRC table and the decoding table. */
7553 for (i = 0; i < 256; i++)
7555 for (c = i << 24, j = 8; j > 0; --j)
7556 c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
7563 crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255];
7569 /* compare-sections command
7571 With no arguments, compares each loadable section in the exec bfd
7572 with the same memory range on the target, and reports mismatches.
7573 Useful for verifying the image on the target against the exec file.
7574 Depends on the target understanding the new "qCRC:" request. */
7576 /* FIXME: cagney/1999-10-26: This command should be broken down into a
7577 target method (target verify memory) and generic version of the
7578 actual command. This will allow other high-level code (especially
7579 generic_load()) to make use of this target functionality. */
7582 compare_sections_command (char *args, int from_tty)
7584 struct remote_state *rs = get_remote_state ();
7586 unsigned long host_crc, target_crc;
7587 struct cleanup *old_chain;
7590 const char *sectname;
7597 error (_("command cannot be used without an exec file"));
7598 if (!current_target.to_shortname ||
7599 strcmp (current_target.to_shortname, "remote") != 0)
7600 error (_("command can only be used with remote target"));
7602 for (s = exec_bfd->sections; s; s = s->next)
7604 if (!(s->flags & SEC_LOAD))
7605 continue; /* skip non-loadable section */
7607 size = bfd_get_section_size (s);
7609 continue; /* skip zero-length section */
7611 sectname = bfd_get_section_name (exec_bfd, s);
7612 if (args && strcmp (args, sectname) != 0)
7613 continue; /* not the section selected by user */
7615 matched = 1; /* do this section */
7617 /* FIXME: assumes lma can fit into long. */
7618 xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx",
7619 (long) lma, (long) size);
7622 /* Be clever; compute the host_crc before waiting for target
7624 sectdata = xmalloc (size);
7625 old_chain = make_cleanup (xfree, sectdata);
7626 bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
7627 host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff);
7629 getpkt (&rs->buf, &rs->buf_size, 0);
7630 if (rs->buf[0] == 'E')
7631 error (_("target memory fault, section %s, range %s -- %s"), sectname,
7632 paddress (target_gdbarch, lma),
7633 paddress (target_gdbarch, lma + size));
7634 if (rs->buf[0] != 'C')
7635 error (_("remote target does not support this operation"));
7637 for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++)
7638 target_crc = target_crc * 16 + fromhex (*tmp);
7640 printf_filtered ("Section %s, range %s -- %s: ", sectname,
7641 paddress (target_gdbarch, lma),
7642 paddress (target_gdbarch, lma + size));
7643 if (host_crc == target_crc)
7644 printf_filtered ("matched.\n");
7647 printf_filtered ("MIS-MATCHED!\n");
7651 do_cleanups (old_chain);
7654 warning (_("One or more sections of the remote executable does not match\n\
7655 the loaded file\n"));
7656 if (args && !matched)
7657 printf_filtered (_("No loaded section named '%s'.\n"), args);
7660 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
7661 into remote target. The number of bytes written to the remote
7662 target is returned, or -1 for error. */
7665 remote_write_qxfer (struct target_ops *ops, const char *object_name,
7666 const char *annex, const gdb_byte *writebuf,
7667 ULONGEST offset, LONGEST len,
7668 struct packet_config *packet)
7672 struct remote_state *rs = get_remote_state ();
7673 int max_size = get_memory_write_packet_size ();
7675 if (packet->support == PACKET_DISABLE)
7678 /* Insert header. */
7679 i = snprintf (rs->buf, max_size,
7680 "qXfer:%s:write:%s:%s:",
7681 object_name, annex ? annex : "",
7682 phex_nz (offset, sizeof offset));
7683 max_size -= (i + 1);
7685 /* Escape as much data as fits into rs->buf. */
7686 buf_len = remote_escape_output
7687 (writebuf, len, (rs->buf + i), &max_size, max_size);
7689 if (putpkt_binary (rs->buf, i + buf_len) < 0
7690 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
7691 || packet_ok (rs->buf, packet) != PACKET_OK)
7694 unpack_varlen_hex (rs->buf, &n);
7698 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
7699 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
7700 number of bytes read is returned, or 0 for EOF, or -1 for error.
7701 The number of bytes read may be less than LEN without indicating an
7702 EOF. PACKET is checked and updated to indicate whether the remote
7703 target supports this object. */
7706 remote_read_qxfer (struct target_ops *ops, const char *object_name,
7708 gdb_byte *readbuf, ULONGEST offset, LONGEST len,
7709 struct packet_config *packet)
7711 static char *finished_object;
7712 static char *finished_annex;
7713 static ULONGEST finished_offset;
7715 struct remote_state *rs = get_remote_state ();
7716 LONGEST i, n, packet_len;
7718 if (packet->support == PACKET_DISABLE)
7721 /* Check whether we've cached an end-of-object packet that matches
7723 if (finished_object)
7725 if (strcmp (object_name, finished_object) == 0
7726 && strcmp (annex ? annex : "", finished_annex) == 0
7727 && offset == finished_offset)
7730 /* Otherwise, we're now reading something different. Discard
7732 xfree (finished_object);
7733 xfree (finished_annex);
7734 finished_object = NULL;
7735 finished_annex = NULL;
7738 /* Request only enough to fit in a single packet. The actual data
7739 may not, since we don't know how much of it will need to be escaped;
7740 the target is free to respond with slightly less data. We subtract
7741 five to account for the response type and the protocol frame. */
7742 n = min (get_remote_packet_size () - 5, len);
7743 snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
7744 object_name, annex ? annex : "",
7745 phex_nz (offset, sizeof offset),
7746 phex_nz (n, sizeof n));
7747 i = putpkt (rs->buf);
7752 packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0);
7753 if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK)
7756 if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
7757 error (_("Unknown remote qXfer reply: %s"), rs->buf);
7759 /* 'm' means there is (or at least might be) more data after this
7760 batch. That does not make sense unless there's at least one byte
7761 of data in this reply. */
7762 if (rs->buf[0] == 'm' && packet_len == 1)
7763 error (_("Remote qXfer reply contained no data."));
7765 /* Got some data. */
7766 i = remote_unescape_input (rs->buf + 1, packet_len - 1, readbuf, n);
7768 /* 'l' is an EOF marker, possibly including a final block of data,
7769 or possibly empty. If we have the final block of a non-empty
7770 object, record this fact to bypass a subsequent partial read. */
7771 if (rs->buf[0] == 'l' && offset + i > 0)
7773 finished_object = xstrdup (object_name);
7774 finished_annex = xstrdup (annex ? annex : "");
7775 finished_offset = offset + i;
7782 remote_xfer_partial (struct target_ops *ops, enum target_object object,
7783 const char *annex, gdb_byte *readbuf,
7784 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
7786 struct remote_state *rs;
7791 set_general_thread (inferior_ptid);
7793 rs = get_remote_state ();
7795 /* Handle memory using the standard memory routines. */
7796 if (object == TARGET_OBJECT_MEMORY)
7801 /* If the remote target is connected but not running, we should
7802 pass this request down to a lower stratum (e.g. the executable
7804 if (!target_has_execution)
7807 if (writebuf != NULL)
7808 xfered = remote_write_bytes (offset, writebuf, len);
7810 xfered = remote_read_bytes (offset, readbuf, len);
7814 else if (xfered == 0 && errno == 0)
7820 /* Handle SPU memory using qxfer packets. */
7821 if (object == TARGET_OBJECT_SPU)
7824 return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len,
7825 &remote_protocol_packets
7826 [PACKET_qXfer_spu_read]);
7828 return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len,
7829 &remote_protocol_packets
7830 [PACKET_qXfer_spu_write]);
7833 /* Handle extra signal info using qxfer packets. */
7834 if (object == TARGET_OBJECT_SIGNAL_INFO)
7837 return remote_read_qxfer (ops, "siginfo", annex, readbuf, offset, len,
7838 &remote_protocol_packets
7839 [PACKET_qXfer_siginfo_read]);
7841 return remote_write_qxfer (ops, "siginfo", annex, writebuf, offset, len,
7842 &remote_protocol_packets
7843 [PACKET_qXfer_siginfo_write]);
7846 /* Only handle flash writes. */
7847 if (writebuf != NULL)
7853 case TARGET_OBJECT_FLASH:
7854 xfered = remote_flash_write (ops, offset, len, writebuf);
7858 else if (xfered == 0 && errno == 0)
7868 /* Map pre-existing objects onto letters. DO NOT do this for new
7869 objects!!! Instead specify new query packets. */
7872 case TARGET_OBJECT_AVR:
7876 case TARGET_OBJECT_AUXV:
7877 gdb_assert (annex == NULL);
7878 return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len,
7879 &remote_protocol_packets[PACKET_qXfer_auxv]);
7881 case TARGET_OBJECT_AVAILABLE_FEATURES:
7882 return remote_read_qxfer
7883 (ops, "features", annex, readbuf, offset, len,
7884 &remote_protocol_packets[PACKET_qXfer_features]);
7886 case TARGET_OBJECT_LIBRARIES:
7887 return remote_read_qxfer
7888 (ops, "libraries", annex, readbuf, offset, len,
7889 &remote_protocol_packets[PACKET_qXfer_libraries]);
7891 case TARGET_OBJECT_MEMORY_MAP:
7892 gdb_assert (annex == NULL);
7893 return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len,
7894 &remote_protocol_packets[PACKET_qXfer_memory_map]);
7896 case TARGET_OBJECT_OSDATA:
7897 /* Should only get here if we're connected. */
7898 gdb_assert (remote_desc);
7899 return remote_read_qxfer
7900 (ops, "osdata", annex, readbuf, offset, len,
7901 &remote_protocol_packets[PACKET_qXfer_osdata]);
7903 case TARGET_OBJECT_THREADS:
7904 gdb_assert (annex == NULL);
7905 return remote_read_qxfer (ops, "threads", annex, readbuf, offset, len,
7906 &remote_protocol_packets[PACKET_qXfer_threads]);
7912 /* Note: a zero OFFSET and LEN can be used to query the minimum
7914 if (offset == 0 && len == 0)
7915 return (get_remote_packet_size ());
7916 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
7917 large enough let the caller deal with it. */
7918 if (len < get_remote_packet_size ())
7920 len = get_remote_packet_size ();
7922 /* Except for querying the minimum buffer size, target must be open. */
7924 error (_("remote query is only available after target open"));
7926 gdb_assert (annex != NULL);
7927 gdb_assert (readbuf != NULL);
7933 /* We used one buffer char for the remote protocol q command and
7934 another for the query type. As the remote protocol encapsulation
7935 uses 4 chars plus one extra in case we are debugging
7936 (remote_debug), we have PBUFZIZ - 7 left to pack the query
7939 while (annex[i] && (i < (get_remote_packet_size () - 8)))
7941 /* Bad caller may have sent forbidden characters. */
7942 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
7947 gdb_assert (annex[i] == '\0');
7949 i = putpkt (rs->buf);
7953 getpkt (&rs->buf, &rs->buf_size, 0);
7954 strcpy ((char *) readbuf, rs->buf);
7956 return strlen ((char *) readbuf);
7960 remote_search_memory (struct target_ops* ops,
7961 CORE_ADDR start_addr, ULONGEST search_space_len,
7962 const gdb_byte *pattern, ULONGEST pattern_len,
7963 CORE_ADDR *found_addrp)
7965 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
7966 struct remote_state *rs = get_remote_state ();
7967 int max_size = get_memory_write_packet_size ();
7968 struct packet_config *packet =
7969 &remote_protocol_packets[PACKET_qSearch_memory];
7970 /* number of packet bytes used to encode the pattern,
7971 this could be more than PATTERN_LEN due to escape characters */
7972 int escaped_pattern_len;
7973 /* amount of pattern that was encodable in the packet */
7974 int used_pattern_len;
7977 ULONGEST found_addr;
7979 /* Don't go to the target if we don't have to.
7980 This is done before checking packet->support to avoid the possibility that
7981 a success for this edge case means the facility works in general. */
7982 if (pattern_len > search_space_len)
7984 if (pattern_len == 0)
7986 *found_addrp = start_addr;
7990 /* If we already know the packet isn't supported, fall back to the simple
7991 way of searching memory. */
7993 if (packet->support == PACKET_DISABLE)
7995 /* Target doesn't provided special support, fall back and use the
7996 standard support (copy memory and do the search here). */
7997 return simple_search_memory (ops, start_addr, search_space_len,
7998 pattern, pattern_len, found_addrp);
8001 /* Insert header. */
8002 i = snprintf (rs->buf, max_size,
8003 "qSearch:memory:%s;%s;",
8004 phex_nz (start_addr, addr_size),
8005 phex_nz (search_space_len, sizeof (search_space_len)));
8006 max_size -= (i + 1);
8008 /* Escape as much data as fits into rs->buf. */
8009 escaped_pattern_len =
8010 remote_escape_output (pattern, pattern_len, (rs->buf + i),
8011 &used_pattern_len, max_size);
8013 /* Bail if the pattern is too large. */
8014 if (used_pattern_len != pattern_len)
8015 error ("Pattern is too large to transmit to remote target.");
8017 if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0
8018 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
8019 || packet_ok (rs->buf, packet) != PACKET_OK)
8021 /* The request may not have worked because the command is not
8022 supported. If so, fall back to the simple way. */
8023 if (packet->support == PACKET_DISABLE)
8025 return simple_search_memory (ops, start_addr, search_space_len,
8026 pattern, pattern_len, found_addrp);
8031 if (rs->buf[0] == '0')
8033 else if (rs->buf[0] == '1')
8036 if (rs->buf[1] != ',')
8037 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
8038 unpack_varlen_hex (rs->buf + 2, &found_addr);
8039 *found_addrp = found_addr;
8042 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
8048 remote_rcmd (char *command,
8049 struct ui_file *outbuf)
8051 struct remote_state *rs = get_remote_state ();
8055 error (_("remote rcmd is only available after target open"));
8057 /* Send a NULL command across as an empty command. */
8058 if (command == NULL)
8061 /* The query prefix. */
8062 strcpy (rs->buf, "qRcmd,");
8063 p = strchr (rs->buf, '\0');
8065 if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/) > get_remote_packet_size ())
8066 error (_("\"monitor\" command ``%s'' is too long."), command);
8068 /* Encode the actual command. */
8069 bin2hex ((gdb_byte *) command, p, 0);
8071 if (putpkt (rs->buf) < 0)
8072 error (_("Communication problem with target."));
8074 /* get/display the response */
8079 /* XXX - see also remote_get_noisy_reply(). */
8081 getpkt (&rs->buf, &rs->buf_size, 0);
8084 error (_("Target does not support this command."));
8085 if (buf[0] == 'O' && buf[1] != 'K')
8087 remote_console_output (buf + 1); /* 'O' message from stub. */
8090 if (strcmp (buf, "OK") == 0)
8092 if (strlen (buf) == 3 && buf[0] == 'E'
8093 && isdigit (buf[1]) && isdigit (buf[2]))
8095 error (_("Protocol error with Rcmd"));
8097 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
8099 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
8100 fputc_unfiltered (c, outbuf);
8106 static VEC(mem_region_s) *
8107 remote_memory_map (struct target_ops *ops)
8109 VEC(mem_region_s) *result = NULL;
8110 char *text = target_read_stralloc (¤t_target,
8111 TARGET_OBJECT_MEMORY_MAP, NULL);
8115 struct cleanup *back_to = make_cleanup (xfree, text);
8116 result = parse_memory_map (text);
8117 do_cleanups (back_to);
8124 packet_command (char *args, int from_tty)
8126 struct remote_state *rs = get_remote_state ();
8129 error (_("command can only be used with remote target"));
8132 error (_("remote-packet command requires packet text as argument"));
8134 puts_filtered ("sending: ");
8135 print_packet (args);
8136 puts_filtered ("\n");
8139 getpkt (&rs->buf, &rs->buf_size, 0);
8140 puts_filtered ("received: ");
8141 print_packet (rs->buf);
8142 puts_filtered ("\n");
8146 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
8148 static void display_thread_info (struct gdb_ext_thread_info *info);
8150 static void threadset_test_cmd (char *cmd, int tty);
8152 static void threadalive_test (char *cmd, int tty);
8154 static void threadlist_test_cmd (char *cmd, int tty);
8156 int get_and_display_threadinfo (threadref *ref);
8158 static void threadinfo_test_cmd (char *cmd, int tty);
8160 static int thread_display_step (threadref *ref, void *context);
8162 static void threadlist_update_test_cmd (char *cmd, int tty);
8164 static void init_remote_threadtests (void);
8166 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
8169 threadset_test_cmd (char *cmd, int tty)
8171 int sample_thread = SAMPLE_THREAD;
8173 printf_filtered (_("Remote threadset test\n"));
8174 set_general_thread (sample_thread);
8179 threadalive_test (char *cmd, int tty)
8181 int sample_thread = SAMPLE_THREAD;
8182 int pid = ptid_get_pid (inferior_ptid);
8183 ptid_t ptid = ptid_build (pid, 0, sample_thread);
8185 if (remote_thread_alive (ptid))
8186 printf_filtered ("PASS: Thread alive test\n");
8188 printf_filtered ("FAIL: Thread alive test\n");
8191 void output_threadid (char *title, threadref *ref);
8194 output_threadid (char *title, threadref *ref)
8198 pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
8200 printf_filtered ("%s %s\n", title, (&hexid[0]));
8204 threadlist_test_cmd (char *cmd, int tty)
8207 threadref nextthread;
8208 int done, result_count;
8209 threadref threadlist[3];
8211 printf_filtered ("Remote Threadlist test\n");
8212 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
8213 &result_count, &threadlist[0]))
8214 printf_filtered ("FAIL: threadlist test\n");
8217 threadref *scan = threadlist;
8218 threadref *limit = scan + result_count;
8220 while (scan < limit)
8221 output_threadid (" thread ", scan++);
8226 display_thread_info (struct gdb_ext_thread_info *info)
8228 output_threadid ("Threadid: ", &info->threadid);
8229 printf_filtered ("Name: %s\n ", info->shortname);
8230 printf_filtered ("State: %s\n", info->display);
8231 printf_filtered ("other: %s\n\n", info->more_display);
8235 get_and_display_threadinfo (threadref *ref)
8239 struct gdb_ext_thread_info threadinfo;
8241 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
8242 | TAG_MOREDISPLAY | TAG_DISPLAY;
8243 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
8244 display_thread_info (&threadinfo);
8249 threadinfo_test_cmd (char *cmd, int tty)
8251 int athread = SAMPLE_THREAD;
8255 int_to_threadref (&thread, athread);
8256 printf_filtered ("Remote Threadinfo test\n");
8257 if (!get_and_display_threadinfo (&thread))
8258 printf_filtered ("FAIL cannot get thread info\n");
8262 thread_display_step (threadref *ref, void *context)
8264 /* output_threadid(" threadstep ",ref); *//* simple test */
8265 return get_and_display_threadinfo (ref);
8269 threadlist_update_test_cmd (char *cmd, int tty)
8271 printf_filtered ("Remote Threadlist update test\n");
8272 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
8276 init_remote_threadtests (void)
8278 add_com ("tlist", class_obscure, threadlist_test_cmd, _("\
8279 Fetch and print the remote list of thread identifiers, one pkt only"));
8280 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
8281 _("Fetch and display info about one thread"));
8282 add_com ("tset", class_obscure, threadset_test_cmd,
8283 _("Test setting to a different thread"));
8284 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
8285 _("Iterate through updating all remote thread info"));
8286 add_com ("talive", class_obscure, threadalive_test,
8287 _(" Remote thread alive test "));
8292 /* Convert a thread ID to a string. Returns the string in a static
8296 remote_pid_to_str (struct target_ops *ops, ptid_t ptid)
8298 static char buf[64];
8299 struct remote_state *rs = get_remote_state ();
8301 if (ptid_is_pid (ptid))
8303 /* Printing an inferior target id. */
8305 /* When multi-process extensions are off, there's no way in the
8306 remote protocol to know the remote process id, if there's any
8307 at all. There's one exception --- when we're connected with
8308 target extended-remote, and we manually attached to a process
8309 with "attach PID". We don't record anywhere a flag that
8310 allows us to distinguish that case from the case of
8311 connecting with extended-remote and the stub already being
8312 attached to a process, and reporting yes to qAttached, hence
8313 no smart special casing here. */
8314 if (!remote_multi_process_p (rs))
8316 xsnprintf (buf, sizeof buf, "Remote target");
8320 return normal_pid_to_str (ptid);
8324 if (ptid_equal (magic_null_ptid, ptid))
8325 xsnprintf (buf, sizeof buf, "Thread <main>");
8326 else if (remote_multi_process_p (rs))
8327 xsnprintf (buf, sizeof buf, "Thread %d.%ld",
8328 ptid_get_pid (ptid), ptid_get_tid (ptid));
8330 xsnprintf (buf, sizeof buf, "Thread %ld",
8331 ptid_get_tid (ptid));
8336 /* Get the address of the thread local variable in OBJFILE which is
8337 stored at OFFSET within the thread local storage for thread PTID. */
8340 remote_get_thread_local_address (struct target_ops *ops,
8341 ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset)
8343 if (remote_protocol_packets[PACKET_qGetTLSAddr].support != PACKET_DISABLE)
8345 struct remote_state *rs = get_remote_state ();
8347 char *endp = rs->buf + get_remote_packet_size ();
8348 enum packet_result result;
8350 strcpy (p, "qGetTLSAddr:");
8352 p = write_ptid (p, endp, ptid);
8354 p += hexnumstr (p, offset);
8356 p += hexnumstr (p, lm);
8360 getpkt (&rs->buf, &rs->buf_size, 0);
8361 result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_qGetTLSAddr]);
8362 if (result == PACKET_OK)
8366 unpack_varlen_hex (rs->buf, &result);
8369 else if (result == PACKET_UNKNOWN)
8370 throw_error (TLS_GENERIC_ERROR,
8371 _("Remote target doesn't support qGetTLSAddr packet"));
8373 throw_error (TLS_GENERIC_ERROR,
8374 _("Remote target failed to process qGetTLSAddr request"));
8377 throw_error (TLS_GENERIC_ERROR,
8378 _("TLS not supported or disabled on this target"));
8383 /* Support for inferring a target description based on the current
8384 architecture and the size of a 'g' packet. While the 'g' packet
8385 can have any size (since optional registers can be left off the
8386 end), some sizes are easily recognizable given knowledge of the
8387 approximate architecture. */
8389 struct remote_g_packet_guess
8392 const struct target_desc *tdesc;
8394 typedef struct remote_g_packet_guess remote_g_packet_guess_s;
8395 DEF_VEC_O(remote_g_packet_guess_s);
8397 struct remote_g_packet_data
8399 VEC(remote_g_packet_guess_s) *guesses;
8402 static struct gdbarch_data *remote_g_packet_data_handle;
8405 remote_g_packet_data_init (struct obstack *obstack)
8407 return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data);
8411 register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
8412 const struct target_desc *tdesc)
8414 struct remote_g_packet_data *data
8415 = gdbarch_data (gdbarch, remote_g_packet_data_handle);
8416 struct remote_g_packet_guess new_guess, *guess;
8419 gdb_assert (tdesc != NULL);
8422 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
8424 if (guess->bytes == bytes)
8425 internal_error (__FILE__, __LINE__,
8426 "Duplicate g packet description added for size %d",
8429 new_guess.bytes = bytes;
8430 new_guess.tdesc = tdesc;
8431 VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess);
8434 /* Return 1 if remote_read_description would do anything on this target
8435 and architecture, 0 otherwise. */
8438 remote_read_description_p (struct target_ops *target)
8440 struct remote_g_packet_data *data
8441 = gdbarch_data (target_gdbarch, remote_g_packet_data_handle);
8443 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
8449 static const struct target_desc *
8450 remote_read_description (struct target_ops *target)
8452 struct remote_g_packet_data *data
8453 = gdbarch_data (target_gdbarch, remote_g_packet_data_handle);
8455 /* Do not try this during initial connection, when we do not know
8456 whether there is a running but stopped thread. */
8457 if (!target_has_execution || ptid_equal (inferior_ptid, null_ptid))
8460 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
8462 struct remote_g_packet_guess *guess;
8464 int bytes = send_g_packet ();
8467 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
8469 if (guess->bytes == bytes)
8470 return guess->tdesc;
8472 /* We discard the g packet. A minor optimization would be to
8473 hold on to it, and fill the register cache once we have selected
8474 an architecture, but it's too tricky to do safely. */
8480 /* Remote file transfer support. This is host-initiated I/O, not
8481 target-initiated; for target-initiated, see remote-fileio.c. */
8483 /* If *LEFT is at least the length of STRING, copy STRING to
8484 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8485 decrease *LEFT. Otherwise raise an error. */
8488 remote_buffer_add_string (char **buffer, int *left, char *string)
8490 int len = strlen (string);
8493 error (_("Packet too long for target."));
8495 memcpy (*buffer, string, len);
8499 /* NUL-terminate the buffer as a convenience, if there is
8505 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
8506 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8507 decrease *LEFT. Otherwise raise an error. */
8510 remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
8513 if (2 * len > *left)
8514 error (_("Packet too long for target."));
8516 bin2hex (bytes, *buffer, len);
8520 /* NUL-terminate the buffer as a convenience, if there is
8526 /* If *LEFT is large enough, convert VALUE to hex and add it to
8527 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8528 decrease *LEFT. Otherwise raise an error. */
8531 remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
8533 int len = hexnumlen (value);
8536 error (_("Packet too long for target."));
8538 hexnumstr (*buffer, value);
8542 /* NUL-terminate the buffer as a convenience, if there is
8548 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
8549 value, *REMOTE_ERRNO to the remote error number or zero if none
8550 was included, and *ATTACHMENT to point to the start of the annex
8551 if any. The length of the packet isn't needed here; there may
8552 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
8554 Return 0 if the packet could be parsed, -1 if it could not. If
8555 -1 is returned, the other variables may not be initialized. */
8558 remote_hostio_parse_result (char *buffer, int *retcode,
8559 int *remote_errno, char **attachment)
8566 if (buffer[0] != 'F')
8570 *retcode = strtol (&buffer[1], &p, 16);
8571 if (errno != 0 || p == &buffer[1])
8574 /* Check for ",errno". */
8578 *remote_errno = strtol (p + 1, &p2, 16);
8579 if (errno != 0 || p + 1 == p2)
8584 /* Check for ";attachment". If there is no attachment, the
8585 packet should end here. */
8588 *attachment = p + 1;
8591 else if (*p == '\0')
8597 /* Send a prepared I/O packet to the target and read its response.
8598 The prepared packet is in the global RS->BUF before this function
8599 is called, and the answer is there when we return.
8601 COMMAND_BYTES is the length of the request to send, which may include
8602 binary data. WHICH_PACKET is the packet configuration to check
8603 before attempting a packet. If an error occurs, *REMOTE_ERRNO
8604 is set to the error number and -1 is returned. Otherwise the value
8605 returned by the function is returned.
8607 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
8608 attachment is expected; an error will be reported if there's a
8609 mismatch. If one is found, *ATTACHMENT will be set to point into
8610 the packet buffer and *ATTACHMENT_LEN will be set to the
8611 attachment's length. */
8614 remote_hostio_send_command (int command_bytes, int which_packet,
8615 int *remote_errno, char **attachment,
8616 int *attachment_len)
8618 struct remote_state *rs = get_remote_state ();
8619 int ret, bytes_read;
8620 char *attachment_tmp;
8623 || remote_protocol_packets[which_packet].support == PACKET_DISABLE)
8625 *remote_errno = FILEIO_ENOSYS;
8629 putpkt_binary (rs->buf, command_bytes);
8630 bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0);
8632 /* If it timed out, something is wrong. Don't try to parse the
8636 *remote_errno = FILEIO_EINVAL;
8640 switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
8643 *remote_errno = FILEIO_EINVAL;
8645 case PACKET_UNKNOWN:
8646 *remote_errno = FILEIO_ENOSYS;
8652 if (remote_hostio_parse_result (rs->buf, &ret, remote_errno,
8655 *remote_errno = FILEIO_EINVAL;
8659 /* Make sure we saw an attachment if and only if we expected one. */
8660 if ((attachment_tmp == NULL && attachment != NULL)
8661 || (attachment_tmp != NULL && attachment == NULL))
8663 *remote_errno = FILEIO_EINVAL;
8667 /* If an attachment was found, it must point into the packet buffer;
8668 work out how many bytes there were. */
8669 if (attachment_tmp != NULL)
8671 *attachment = attachment_tmp;
8672 *attachment_len = bytes_read - (*attachment - rs->buf);
8678 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
8679 remote file descriptor, or -1 if an error occurs (and set
8683 remote_hostio_open (const char *filename, int flags, int mode,
8686 struct remote_state *rs = get_remote_state ();
8688 int left = get_remote_packet_size () - 1;
8690 remote_buffer_add_string (&p, &left, "vFile:open:");
8692 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
8694 remote_buffer_add_string (&p, &left, ",");
8696 remote_buffer_add_int (&p, &left, flags);
8697 remote_buffer_add_string (&p, &left, ",");
8699 remote_buffer_add_int (&p, &left, mode);
8701 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open,
8702 remote_errno, NULL, NULL);
8705 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
8706 Return the number of bytes written, or -1 if an error occurs (and
8707 set *REMOTE_ERRNO). */
8710 remote_hostio_pwrite (int fd, const gdb_byte *write_buf, int len,
8711 ULONGEST offset, int *remote_errno)
8713 struct remote_state *rs = get_remote_state ();
8715 int left = get_remote_packet_size ();
8718 remote_buffer_add_string (&p, &left, "vFile:pwrite:");
8720 remote_buffer_add_int (&p, &left, fd);
8721 remote_buffer_add_string (&p, &left, ",");
8723 remote_buffer_add_int (&p, &left, offset);
8724 remote_buffer_add_string (&p, &left, ",");
8726 p += remote_escape_output (write_buf, len, p, &out_len,
8727 get_remote_packet_size () - (p - rs->buf));
8729 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite,
8730 remote_errno, NULL, NULL);
8733 /* Read up to LEN bytes FD on the remote target into READ_BUF
8734 Return the number of bytes read, or -1 if an error occurs (and
8735 set *REMOTE_ERRNO). */
8738 remote_hostio_pread (int fd, gdb_byte *read_buf, int len,
8739 ULONGEST offset, int *remote_errno)
8741 struct remote_state *rs = get_remote_state ();
8744 int left = get_remote_packet_size ();
8745 int ret, attachment_len;
8748 remote_buffer_add_string (&p, &left, "vFile:pread:");
8750 remote_buffer_add_int (&p, &left, fd);
8751 remote_buffer_add_string (&p, &left, ",");
8753 remote_buffer_add_int (&p, &left, len);
8754 remote_buffer_add_string (&p, &left, ",");
8756 remote_buffer_add_int (&p, &left, offset);
8758 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread,
8759 remote_errno, &attachment,
8765 read_len = remote_unescape_input (attachment, attachment_len,
8767 if (read_len != ret)
8768 error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
8773 /* Close FD on the remote target. Return 0, or -1 if an error occurs
8774 (and set *REMOTE_ERRNO). */
8777 remote_hostio_close (int fd, int *remote_errno)
8779 struct remote_state *rs = get_remote_state ();
8781 int left = get_remote_packet_size () - 1;
8783 remote_buffer_add_string (&p, &left, "vFile:close:");
8785 remote_buffer_add_int (&p, &left, fd);
8787 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close,
8788 remote_errno, NULL, NULL);
8791 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
8792 occurs (and set *REMOTE_ERRNO). */
8795 remote_hostio_unlink (const char *filename, int *remote_errno)
8797 struct remote_state *rs = get_remote_state ();
8799 int left = get_remote_packet_size () - 1;
8801 remote_buffer_add_string (&p, &left, "vFile:unlink:");
8803 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
8806 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink,
8807 remote_errno, NULL, NULL);
8811 remote_fileio_errno_to_host (int errnum)
8835 case FILEIO_ENOTDIR:
8855 case FILEIO_ENAMETOOLONG:
8856 return ENAMETOOLONG;
8862 remote_hostio_error (int errnum)
8864 int host_error = remote_fileio_errno_to_host (errnum);
8866 if (host_error == -1)
8867 error (_("Unknown remote I/O error %d"), errnum);
8869 error (_("Remote I/O error: %s"), safe_strerror (host_error));
8873 remote_hostio_close_cleanup (void *opaque)
8875 int fd = *(int *) opaque;
8878 remote_hostio_close (fd, &remote_errno);
8883 remote_bfd_iovec_open (struct bfd *abfd, void *open_closure)
8885 const char *filename = bfd_get_filename (abfd);
8886 int fd, remote_errno;
8889 gdb_assert (remote_filename_p (filename));
8891 fd = remote_hostio_open (filename + 7, FILEIO_O_RDONLY, 0, &remote_errno);
8894 errno = remote_fileio_errno_to_host (remote_errno);
8895 bfd_set_error (bfd_error_system_call);
8899 stream = xmalloc (sizeof (int));
8905 remote_bfd_iovec_close (struct bfd *abfd, void *stream)
8907 int fd = *(int *)stream;
8912 /* Ignore errors on close; these may happen if the remote
8913 connection was already torn down. */
8914 remote_hostio_close (fd, &remote_errno);
8920 remote_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf,
8921 file_ptr nbytes, file_ptr offset)
8923 int fd = *(int *)stream;
8925 file_ptr pos, bytes;
8928 while (nbytes > pos)
8930 bytes = remote_hostio_pread (fd, (char *)buf + pos, nbytes - pos,
8931 offset + pos, &remote_errno);
8933 /* Success, but no bytes, means end-of-file. */
8937 errno = remote_fileio_errno_to_host (remote_errno);
8938 bfd_set_error (bfd_error_system_call);
8949 remote_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb)
8951 /* FIXME: We should probably implement remote_hostio_stat. */
8952 sb->st_size = INT_MAX;
8957 remote_filename_p (const char *filename)
8959 return strncmp (filename, "remote:", 7) == 0;
8963 remote_bfd_open (const char *remote_file, const char *target)
8965 return bfd_openr_iovec (remote_file, target,
8966 remote_bfd_iovec_open, NULL,
8967 remote_bfd_iovec_pread,
8968 remote_bfd_iovec_close,
8969 remote_bfd_iovec_stat);
8973 remote_file_put (const char *local_file, const char *remote_file, int from_tty)
8975 struct cleanup *back_to, *close_cleanup;
8976 int retcode, fd, remote_errno, bytes, io_size;
8979 int bytes_in_buffer;
8984 error (_("command can only be used with remote target"));
8986 file = fopen (local_file, "rb");
8988 perror_with_name (local_file);
8989 back_to = make_cleanup_fclose (file);
8991 fd = remote_hostio_open (remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
8993 0700, &remote_errno);
8995 remote_hostio_error (remote_errno);
8997 /* Send up to this many bytes at once. They won't all fit in the
8998 remote packet limit, so we'll transfer slightly fewer. */
8999 io_size = get_remote_packet_size ();
9000 buffer = xmalloc (io_size);
9001 make_cleanup (xfree, buffer);
9003 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
9005 bytes_in_buffer = 0;
9008 while (bytes_in_buffer || !saw_eof)
9012 bytes = fread (buffer + bytes_in_buffer, 1, io_size - bytes_in_buffer,
9017 error (_("Error reading %s."), local_file);
9020 /* EOF. Unless there is something still in the
9021 buffer from the last iteration, we are done. */
9023 if (bytes_in_buffer == 0)
9031 bytes += bytes_in_buffer;
9032 bytes_in_buffer = 0;
9034 retcode = remote_hostio_pwrite (fd, buffer, bytes, offset, &remote_errno);
9037 remote_hostio_error (remote_errno);
9038 else if (retcode == 0)
9039 error (_("Remote write of %d bytes returned 0!"), bytes);
9040 else if (retcode < bytes)
9042 /* Short write. Save the rest of the read data for the next
9044 bytes_in_buffer = bytes - retcode;
9045 memmove (buffer, buffer + retcode, bytes_in_buffer);
9051 discard_cleanups (close_cleanup);
9052 if (remote_hostio_close (fd, &remote_errno))
9053 remote_hostio_error (remote_errno);
9056 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
9057 do_cleanups (back_to);
9061 remote_file_get (const char *remote_file, const char *local_file, int from_tty)
9063 struct cleanup *back_to, *close_cleanup;
9064 int fd, remote_errno, bytes, io_size;
9070 error (_("command can only be used with remote target"));
9072 fd = remote_hostio_open (remote_file, FILEIO_O_RDONLY, 0, &remote_errno);
9074 remote_hostio_error (remote_errno);
9076 file = fopen (local_file, "wb");
9078 perror_with_name (local_file);
9079 back_to = make_cleanup_fclose (file);
9081 /* Send up to this many bytes at once. They won't all fit in the
9082 remote packet limit, so we'll transfer slightly fewer. */
9083 io_size = get_remote_packet_size ();
9084 buffer = xmalloc (io_size);
9085 make_cleanup (xfree, buffer);
9087 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
9092 bytes = remote_hostio_pread (fd, buffer, io_size, offset, &remote_errno);
9094 /* Success, but no bytes, means end-of-file. */
9097 remote_hostio_error (remote_errno);
9101 bytes = fwrite (buffer, 1, bytes, file);
9103 perror_with_name (local_file);
9106 discard_cleanups (close_cleanup);
9107 if (remote_hostio_close (fd, &remote_errno))
9108 remote_hostio_error (remote_errno);
9111 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
9112 do_cleanups (back_to);
9116 remote_file_delete (const char *remote_file, int from_tty)
9118 int retcode, remote_errno;
9121 error (_("command can only be used with remote target"));
9123 retcode = remote_hostio_unlink (remote_file, &remote_errno);
9125 remote_hostio_error (remote_errno);
9128 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
9132 remote_put_command (char *args, int from_tty)
9134 struct cleanup *back_to;
9138 error_no_arg (_("file to put"));
9140 argv = gdb_buildargv (args);
9141 back_to = make_cleanup_freeargv (argv);
9142 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
9143 error (_("Invalid parameters to remote put"));
9145 remote_file_put (argv[0], argv[1], from_tty);
9147 do_cleanups (back_to);
9151 remote_get_command (char *args, int from_tty)
9153 struct cleanup *back_to;
9157 error_no_arg (_("file to get"));
9159 argv = gdb_buildargv (args);
9160 back_to = make_cleanup_freeargv (argv);
9161 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
9162 error (_("Invalid parameters to remote get"));
9164 remote_file_get (argv[0], argv[1], from_tty);
9166 do_cleanups (back_to);
9170 remote_delete_command (char *args, int from_tty)
9172 struct cleanup *back_to;
9176 error_no_arg (_("file to delete"));
9178 argv = gdb_buildargv (args);
9179 back_to = make_cleanup_freeargv (argv);
9180 if (argv[0] == NULL || argv[1] != NULL)
9181 error (_("Invalid parameters to remote delete"));
9183 remote_file_delete (argv[0], from_tty);
9185 do_cleanups (back_to);
9189 remote_command (char *args, int from_tty)
9191 help_list (remote_cmdlist, "remote ", -1, gdb_stdout);
9195 remote_can_execute_reverse (void)
9197 if (remote_protocol_packets[PACKET_bs].support == PACKET_ENABLE
9198 || remote_protocol_packets[PACKET_bc].support == PACKET_ENABLE)
9205 remote_supports_non_stop (void)
9211 remote_supports_multi_process (void)
9213 struct remote_state *rs = get_remote_state ();
9214 return remote_multi_process_p (rs);
9218 remote_supports_cond_tracepoints (void)
9220 struct remote_state *rs = get_remote_state ();
9221 return rs->cond_tracepoints;
9225 remote_supports_fast_tracepoints (void)
9227 struct remote_state *rs = get_remote_state ();
9228 return rs->fast_tracepoints;
9232 remote_trace_init ()
9235 remote_get_noisy_reply (&target_buf, &target_buf_size);
9236 if (strcmp (target_buf, "OK"))
9237 error (_("Target does not support this command."));
9240 static void free_actions_list (char **actions_list);
9241 static void free_actions_list_cleanup_wrapper (void *);
9243 free_actions_list_cleanup_wrapper (void *al)
9245 free_actions_list (al);
9249 free_actions_list (char **actions_list)
9253 if (actions_list == 0)
9256 for (ndx = 0; actions_list[ndx]; ndx++)
9257 xfree (actions_list[ndx]);
9259 xfree (actions_list);
9263 remote_download_tracepoint (struct breakpoint *t)
9265 struct bp_location *loc;
9270 char **stepping_actions;
9272 struct cleanup *old_chain = NULL;
9273 struct agent_expr *aexpr;
9274 struct cleanup *aexpr_chain = NULL;
9277 /* Iterate over all the tracepoint locations. It's up to the target to
9278 notice multiple tracepoint packets with the same number but different
9279 addresses, and treat them as multiple locations. */
9280 for (loc = t->loc; loc; loc = loc->next)
9282 encode_actions (t, loc, &tdp_actions, &stepping_actions);
9283 old_chain = make_cleanup (free_actions_list_cleanup_wrapper,
9285 (void) make_cleanup (free_actions_list_cleanup_wrapper, stepping_actions);
9287 tpaddr = loc->address;
9288 sprintf_vma (tmp, (loc ? tpaddr : 0));
9289 sprintf (buf, "QTDP:%x:%s:%c:%lx:%x", t->number,
9291 (t->enable_state == bp_enabled ? 'E' : 'D'),
9292 t->step_count, t->pass_count);
9293 /* Fast tracepoints are mostly handled by the target, but we can
9294 tell the target how big of an instruction block should be moved
9296 if (t->type == bp_fast_tracepoint)
9298 /* Only test for support at download time; we may not know
9299 target capabilities at definition time. */
9300 if (remote_supports_fast_tracepoints ())
9304 if (gdbarch_fast_tracepoint_valid_at (target_gdbarch,
9305 tpaddr, &isize, NULL))
9306 sprintf (buf + strlen (buf), ":F%x", isize);
9308 /* If it passed validation at definition but fails now,
9309 something is very wrong. */
9310 internal_error (__FILE__, __LINE__,
9311 "Fast tracepoint not valid during download");
9314 /* Fast tracepoints are functionally identical to regular
9315 tracepoints, so don't take lack of support as a reason to
9316 give up on the trace run. */
9317 warning (_("Target does not support fast tracepoints, downloading %d as regular tracepoint"), t->number);
9319 /* If the tracepoint has a conditional, make it into an agent
9320 expression and append to the definition. */
9323 /* Only test support at download time, we may not know target
9324 capabilities at definition time. */
9325 if (remote_supports_cond_tracepoints ())
9327 aexpr = gen_eval_for_expr (tpaddr, loc->cond);
9328 aexpr_chain = make_cleanup_free_agent_expr (aexpr);
9329 sprintf (buf + strlen (buf), ":X%x,", aexpr->len);
9330 pkt = buf + strlen (buf);
9331 for (ndx = 0; ndx < aexpr->len; ++ndx)
9332 pkt = pack_hex_byte (pkt, aexpr->buf[ndx]);
9334 do_cleanups (aexpr_chain);
9337 warning (_("Target does not support conditional tracepoints, ignoring tp %d cond"), t->number);
9340 if (t->commands || *default_collect)
9343 remote_get_noisy_reply (&target_buf, &target_buf_size);
9344 if (strcmp (target_buf, "OK"))
9345 error (_("Target does not support tracepoints."));
9347 if (!t->commands && !*default_collect)
9350 /* do_single_steps (t); */
9353 for (ndx = 0; tdp_actions[ndx]; ndx++)
9355 QUIT; /* allow user to bail out with ^C */
9356 sprintf (buf, "QTDP:-%x:%s:%s%c",
9357 t->number, tmp, /* address */
9359 ((tdp_actions[ndx + 1] || stepping_actions)
9362 remote_get_noisy_reply (&target_buf,
9364 if (strcmp (target_buf, "OK"))
9365 error (_("Error on target while setting tracepoints."));
9368 if (stepping_actions)
9370 for (ndx = 0; stepping_actions[ndx]; ndx++)
9372 QUIT; /* allow user to bail out with ^C */
9373 sprintf (buf, "QTDP:-%x:%s:%s%s%s",
9374 t->number, tmp, /* address */
9375 ((ndx == 0) ? "S" : ""),
9376 stepping_actions[ndx],
9377 (stepping_actions[ndx + 1] ? "-" : ""));
9379 remote_get_noisy_reply (&target_buf,
9381 if (strcmp (target_buf, "OK"))
9382 error (_("Error on target while setting tracepoints."));
9385 do_cleanups (old_chain);
9390 remote_download_trace_state_variable (struct trace_state_variable *tsv)
9392 struct remote_state *rs = get_remote_state ();
9395 sprintf (rs->buf, "QTDV:%x:%s:%x:",
9396 tsv->number, phex ((ULONGEST) tsv->initial_value, 8), tsv->builtin);
9397 p = rs->buf + strlen (rs->buf);
9398 if ((p - rs->buf) + strlen (tsv->name) * 2 >= get_remote_packet_size ())
9399 error (_("Trace state variable name too long for tsv definition packet"));
9400 p += 2 * bin2hex ((gdb_byte *) (tsv->name), p, 0);
9403 remote_get_noisy_reply (&target_buf, &target_buf_size);
9407 remote_trace_set_readonly_regions ()
9415 return; /* No information to give. */
9417 strcpy (target_buf, "QTro");
9418 for (s = exec_bfd->sections; s; s = s->next)
9420 char tmp1[40], tmp2[40];
9422 if ((s->flags & SEC_LOAD) == 0 ||
9423 /* (s->flags & SEC_CODE) == 0 || */
9424 (s->flags & SEC_READONLY) == 0)
9429 size = bfd_get_section_size (s);
9430 sprintf_vma (tmp1, lma);
9431 sprintf_vma (tmp2, lma + size);
9432 sprintf (target_buf + strlen (target_buf),
9433 ":%s,%s", tmp1, tmp2);
9437 putpkt (target_buf);
9438 getpkt (&target_buf, &target_buf_size, 0);
9443 remote_trace_start ()
9446 remote_get_noisy_reply (&target_buf, &target_buf_size);
9447 if (strcmp (target_buf, "OK"))
9448 error (_("Bogus reply from target: %s"), target_buf);
9452 remote_get_trace_status (struct trace_status *ts)
9454 char *p, *p1, *p_temp;
9456 /* FIXME we need to get register block size some other way */
9457 extern int trace_regblock_size;
9458 trace_regblock_size = get_remote_arch_state ()->sizeof_g_packet;
9460 putpkt ("qTStatus");
9461 getpkt (&target_buf, &target_buf_size, 0);
9462 /* FIXME should handle more variety of replies */
9466 /* If the remote target doesn't do tracing, flag it. */
9470 /* We're working with a live target. */
9473 /* Set some defaults. */
9474 ts->running_known = 0;
9475 ts->stop_reason = trace_stop_reason_unknown;
9476 ts->traceframe_count = -1;
9477 ts->buffer_free = 0;
9480 error (_("Bogus trace status reply from target: %s"), target_buf);
9482 parse_trace_status (p, ts);
9488 remote_trace_stop ()
9491 remote_get_noisy_reply (&target_buf, &target_buf_size);
9492 if (strcmp (target_buf, "OK"))
9493 error (_("Bogus reply from target: %s"), target_buf);
9497 remote_trace_find (enum trace_find_type type, int num,
9498 ULONGEST addr1, ULONGEST addr2,
9501 struct remote_state *rs = get_remote_state ();
9503 int target_frameno = -1, target_tracept = -1;
9506 strcpy (p, "QTFrame:");
9507 p = strchr (p, '\0');
9511 sprintf (p, "%x", num);
9514 sprintf (p, "pc:%s", phex_nz (addr1, 0));
9517 sprintf (p, "tdp:%x", num);
9520 sprintf (p, "range:%s:%s", phex_nz (addr1, 0), phex_nz (addr2, 0));
9523 sprintf (p, "outside:%s:%s", phex_nz (addr1, 0), phex_nz (addr2, 0));
9526 error ("Unknown trace find type %d", type);
9530 reply = remote_get_noisy_reply (&(rs->buf), &sizeof_pkt);
9532 while (reply && *reply)
9537 target_frameno = (int) strtol (p, &reply, 16);
9539 error (_("Unable to parse trace frame number"));
9540 if (target_frameno == -1)
9545 target_tracept = (int) strtol (p, &reply, 16);
9547 error (_("Unable to parse tracepoint number"));
9549 case 'O': /* "OK"? */
9550 if (reply[1] == 'K' && reply[2] == '\0')
9553 error (_("Bogus reply from target: %s"), reply);
9556 error (_("Bogus reply from target: %s"), reply);
9559 *tpp = target_tracept;
9560 return target_frameno;
9564 remote_get_trace_state_variable_value (int tsvnum, LONGEST *val)
9566 struct remote_state *rs = get_remote_state ();
9570 sprintf (rs->buf, "qTV:%x", tsvnum);
9572 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
9573 if (reply && *reply)
9577 unpack_varlen_hex (reply + 1, &uval);
9578 *val = (LONGEST) uval;
9586 remote_save_trace_data (const char *filename)
9588 struct remote_state *rs = get_remote_state ();
9592 strcpy (p, "QTSave:");
9594 if ((p - rs->buf) + strlen (filename) * 2 >= get_remote_packet_size ())
9595 error (_("Remote file name too long for trace save packet"));
9596 p += 2 * bin2hex ((gdb_byte *) filename, p, 0);
9599 remote_get_noisy_reply (&target_buf, &target_buf_size);
9603 /* This is basically a memory transfer, but needs to be its own packet
9604 because we don't know how the target actually organizes its trace
9605 memory, plus we want to be able to ask for as much as possible, but
9606 not be unhappy if we don't get as much as we ask for. */
9609 remote_get_raw_trace_data (gdb_byte *buf, ULONGEST offset, LONGEST len)
9611 struct remote_state *rs = get_remote_state ();
9617 strcpy (p, "qTBuffer:");
9619 p += hexnumstr (p, offset);
9621 p += hexnumstr (p, len);
9625 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
9626 if (reply && *reply)
9628 /* 'l' by itself means we're at the end of the buffer and
9629 there is nothing more to get. */
9633 /* Convert the reply into binary. Limit the number of bytes to
9634 convert according to our passed-in buffer size, rather than
9635 what was returned in the packet; if the target is
9636 unexpectedly generous and gives us a bigger reply than we
9637 asked for, we don't want to crash. */
9638 rslt = hex2bin (target_buf, buf, len);
9642 /* Something went wrong, flag as an error. */
9647 remote_set_disconnected_tracing (int val)
9649 struct remote_state *rs = get_remote_state ();
9651 sprintf (rs->buf, "QTDisconnected:%x", val);
9653 remote_get_noisy_reply (&target_buf, &target_buf_size);
9654 if (strcmp (target_buf, "OK"))
9655 error (_("Target does not support this command."));
9659 remote_core_of_thread (struct target_ops *ops, ptid_t ptid)
9661 struct thread_info *info = find_thread_ptid (ptid);
9662 if (info && info->private)
9663 return info->private->core;
9668 remote_set_circular_trace_buffer (int val)
9670 struct remote_state *rs = get_remote_state ();
9672 sprintf (rs->buf, "QTBuffer:circular:%x", val);
9674 remote_get_noisy_reply (&target_buf, &target_buf_size);
9675 if (strcmp (target_buf, "OK"))
9676 error (_("Target does not support this command."));
9680 init_remote_ops (void)
9682 remote_ops.to_shortname = "remote";
9683 remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
9685 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
9686 Specify the serial device it is connected to\n\
9687 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
9688 remote_ops.to_open = remote_open;
9689 remote_ops.to_close = remote_close;
9690 remote_ops.to_detach = remote_detach;
9691 remote_ops.to_disconnect = remote_disconnect;
9692 remote_ops.to_resume = remote_resume;
9693 remote_ops.to_wait = remote_wait;
9694 remote_ops.to_fetch_registers = remote_fetch_registers;
9695 remote_ops.to_store_registers = remote_store_registers;
9696 remote_ops.to_prepare_to_store = remote_prepare_to_store;
9697 remote_ops.deprecated_xfer_memory = remote_xfer_memory;
9698 remote_ops.to_files_info = remote_files_info;
9699 remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
9700 remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
9701 remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
9702 remote_ops.to_stopped_data_address = remote_stopped_data_address;
9703 remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
9704 remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
9705 remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
9706 remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
9707 remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
9708 remote_ops.to_kill = remote_kill;
9709 remote_ops.to_load = generic_load;
9710 remote_ops.to_mourn_inferior = remote_mourn;
9711 remote_ops.to_thread_alive = remote_thread_alive;
9712 remote_ops.to_find_new_threads = remote_threads_info;
9713 remote_ops.to_pid_to_str = remote_pid_to_str;
9714 remote_ops.to_extra_thread_info = remote_threads_extra_info;
9715 remote_ops.to_get_ada_task_ptid = remote_get_ada_task_ptid;
9716 remote_ops.to_stop = remote_stop;
9717 remote_ops.to_xfer_partial = remote_xfer_partial;
9718 remote_ops.to_rcmd = remote_rcmd;
9719 remote_ops.to_log_command = serial_log_command;
9720 remote_ops.to_get_thread_local_address = remote_get_thread_local_address;
9721 remote_ops.to_stratum = process_stratum;
9722 remote_ops.to_has_all_memory = default_child_has_all_memory;
9723 remote_ops.to_has_memory = default_child_has_memory;
9724 remote_ops.to_has_stack = default_child_has_stack;
9725 remote_ops.to_has_registers = default_child_has_registers;
9726 remote_ops.to_has_execution = default_child_has_execution;
9727 remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
9728 remote_ops.to_can_execute_reverse = remote_can_execute_reverse;
9729 remote_ops.to_magic = OPS_MAGIC;
9730 remote_ops.to_memory_map = remote_memory_map;
9731 remote_ops.to_flash_erase = remote_flash_erase;
9732 remote_ops.to_flash_done = remote_flash_done;
9733 remote_ops.to_read_description = remote_read_description;
9734 remote_ops.to_search_memory = remote_search_memory;
9735 remote_ops.to_can_async_p = remote_can_async_p;
9736 remote_ops.to_is_async_p = remote_is_async_p;
9737 remote_ops.to_async = remote_async;
9738 remote_ops.to_async_mask = remote_async_mask;
9739 remote_ops.to_terminal_inferior = remote_terminal_inferior;
9740 remote_ops.to_terminal_ours = remote_terminal_ours;
9741 remote_ops.to_supports_non_stop = remote_supports_non_stop;
9742 remote_ops.to_supports_multi_process = remote_supports_multi_process;
9743 remote_ops.to_trace_init = remote_trace_init;
9744 remote_ops.to_download_tracepoint = remote_download_tracepoint;
9745 remote_ops.to_download_trace_state_variable = remote_download_trace_state_variable;
9746 remote_ops.to_trace_set_readonly_regions = remote_trace_set_readonly_regions;
9747 remote_ops.to_trace_start = remote_trace_start;
9748 remote_ops.to_get_trace_status = remote_get_trace_status;
9749 remote_ops.to_trace_stop = remote_trace_stop;
9750 remote_ops.to_trace_find = remote_trace_find;
9751 remote_ops.to_get_trace_state_variable_value = remote_get_trace_state_variable_value;
9752 remote_ops.to_save_trace_data = remote_save_trace_data;
9753 remote_ops.to_upload_tracepoints = remote_upload_tracepoints;
9754 remote_ops.to_upload_trace_state_variables = remote_upload_trace_state_variables;
9755 remote_ops.to_get_raw_trace_data = remote_get_raw_trace_data;
9756 remote_ops.to_set_disconnected_tracing = remote_set_disconnected_tracing;
9757 remote_ops.to_set_circular_trace_buffer = remote_set_circular_trace_buffer;
9758 remote_ops.to_core_of_thread = remote_core_of_thread;
9761 /* Set up the extended remote vector by making a copy of the standard
9762 remote vector and adding to it. */
9765 init_extended_remote_ops (void)
9767 extended_remote_ops = remote_ops;
9769 extended_remote_ops.to_shortname = "extended-remote";
9770 extended_remote_ops.to_longname =
9771 "Extended remote serial target in gdb-specific protocol";
9772 extended_remote_ops.to_doc =
9773 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
9774 Specify the serial device it is connected to (e.g. /dev/ttya).";
9775 extended_remote_ops.to_open = extended_remote_open;
9776 extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
9777 extended_remote_ops.to_mourn_inferior = extended_remote_mourn;
9778 extended_remote_ops.to_detach = extended_remote_detach;
9779 extended_remote_ops.to_attach = extended_remote_attach;
9780 extended_remote_ops.to_kill = extended_remote_kill;
9784 remote_can_async_p (void)
9786 if (!target_async_permitted)
9787 /* We only enable async when the user specifically asks for it. */
9790 /* We're async whenever the serial device is. */
9791 return remote_async_mask_value && serial_can_async_p (remote_desc);
9795 remote_is_async_p (void)
9797 if (!target_async_permitted)
9798 /* We only enable async when the user specifically asks for it. */
9801 /* We're async whenever the serial device is. */
9802 return remote_async_mask_value && serial_is_async_p (remote_desc);
9805 /* Pass the SERIAL event on and up to the client. One day this code
9806 will be able to delay notifying the client of an event until the
9807 point where an entire packet has been received. */
9809 static void (*async_client_callback) (enum inferior_event_type event_type,
9811 static void *async_client_context;
9812 static serial_event_ftype remote_async_serial_handler;
9815 remote_async_serial_handler (struct serial *scb, void *context)
9817 /* Don't propogate error information up to the client. Instead let
9818 the client find out about the error by querying the target. */
9819 async_client_callback (INF_REG_EVENT, async_client_context);
9823 remote_async_inferior_event_handler (gdb_client_data data)
9825 inferior_event_handler (INF_REG_EVENT, NULL);
9829 remote_async_get_pending_events_handler (gdb_client_data data)
9831 remote_get_pending_stop_replies ();
9835 remote_async (void (*callback) (enum inferior_event_type event_type,
9836 void *context), void *context)
9838 if (remote_async_mask_value == 0)
9839 internal_error (__FILE__, __LINE__,
9840 _("Calling remote_async when async is masked"));
9842 if (callback != NULL)
9844 serial_async (remote_desc, remote_async_serial_handler, NULL);
9845 async_client_callback = callback;
9846 async_client_context = context;
9849 serial_async (remote_desc, NULL, NULL);
9853 remote_async_mask (int new_mask)
9855 int curr_mask = remote_async_mask_value;
9856 remote_async_mask_value = new_mask;
9861 set_remote_cmd (char *args, int from_tty)
9863 help_list (remote_set_cmdlist, "set remote ", -1, gdb_stdout);
9867 show_remote_cmd (char *args, int from_tty)
9869 /* We can't just use cmd_show_list here, because we want to skip
9870 the redundant "show remote Z-packet" and the legacy aliases. */
9871 struct cleanup *showlist_chain;
9872 struct cmd_list_element *list = remote_show_cmdlist;
9874 showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist");
9875 for (; list != NULL; list = list->next)
9876 if (strcmp (list->name, "Z-packet") == 0)
9878 else if (list->type == not_set_cmd)
9879 /* Alias commands are exactly like the original, except they
9880 don't have the normal type. */
9884 struct cleanup *option_chain
9885 = make_cleanup_ui_out_tuple_begin_end (uiout, "option");
9886 ui_out_field_string (uiout, "name", list->name);
9887 ui_out_text (uiout, ": ");
9888 if (list->type == show_cmd)
9889 do_setshow_command ((char *) NULL, from_tty, list);
9891 cmd_func (list, NULL, from_tty);
9892 /* Close the tuple. */
9893 do_cleanups (option_chain);
9896 /* Close the tuple. */
9897 do_cleanups (showlist_chain);
9901 /* Function to be called whenever a new objfile (shlib) is detected. */
9903 remote_new_objfile (struct objfile *objfile)
9905 if (remote_desc != 0) /* Have a remote connection. */
9906 remote_check_symbols (objfile);
9909 /* Pull all the tracepoints defined on the target and create local
9910 data structures representing them. We don't want to create real
9911 tracepoints yet, we don't want to mess up the user's existing
9915 remote_upload_tracepoints (struct uploaded_tp **utpp)
9917 struct remote_state *rs = get_remote_state ();
9920 /* Ask for a first packet of tracepoint definition. */
9922 getpkt (&rs->buf, &rs->buf_size, 0);
9924 while (*p && *p != 'l')
9926 parse_tracepoint_definition (p, utpp);
9927 /* Ask for another packet of tracepoint definition. */
9929 getpkt (&rs->buf, &rs->buf_size, 0);
9936 remote_upload_trace_state_variables (struct uploaded_tsv **utsvp)
9938 struct remote_state *rs = get_remote_state ();
9941 /* Ask for a first packet of variable definition. */
9943 getpkt (&rs->buf, &rs->buf_size, 0);
9945 while (*p && *p != 'l')
9947 parse_tsv_definition (p, utsvp);
9948 /* Ask for another packet of variable definition. */
9950 getpkt (&rs->buf, &rs->buf_size, 0);
9957 _initialize_remote (void)
9959 struct remote_state *rs;
9960 struct cmd_list_element *cmd;
9963 /* architecture specific data */
9964 remote_gdbarch_data_handle =
9965 gdbarch_data_register_post_init (init_remote_state);
9966 remote_g_packet_data_handle =
9967 gdbarch_data_register_pre_init (remote_g_packet_data_init);
9969 /* Initialize the per-target state. At the moment there is only one
9970 of these, not one per target. Only one target is active at a
9971 time. The default buffer size is unimportant; it will be expanded
9972 whenever a larger buffer is needed. */
9973 rs = get_remote_state_raw ();
9975 rs->buf = xmalloc (rs->buf_size);
9978 add_target (&remote_ops);
9980 init_extended_remote_ops ();
9981 add_target (&extended_remote_ops);
9983 /* Hook into new objfile notification. */
9984 observer_attach_new_objfile (remote_new_objfile);
9986 /* Set up signal handlers. */
9987 sigint_remote_token =
9988 create_async_signal_handler (async_remote_interrupt, NULL);
9989 sigint_remote_twice_token =
9990 create_async_signal_handler (inferior_event_handler_wrapper, NULL);
9993 init_remote_threadtests ();
9996 /* set/show remote ... */
9998 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
9999 Remote protocol specific variables\n\
10000 Configure various remote-protocol specific variables such as\n\
10001 the packets being used"),
10002 &remote_set_cmdlist, "set remote ",
10003 0 /* allow-unknown */, &setlist);
10004 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
10005 Remote protocol specific variables\n\
10006 Configure various remote-protocol specific variables such as\n\
10007 the packets being used"),
10008 &remote_show_cmdlist, "show remote ",
10009 0 /* allow-unknown */, &showlist);
10011 add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
10012 Compare section data on target to the exec file.\n\
10013 Argument is a single section name (default: all loaded sections)."),
10016 add_cmd ("packet", class_maintenance, packet_command, _("\
10017 Send an arbitrary packet to a remote target.\n\
10018 maintenance packet TEXT\n\
10019 If GDB is talking to an inferior via the GDB serial protocol, then\n\
10020 this command sends the string TEXT to the inferior, and displays the\n\
10021 response packet. GDB supplies the initial `$' character, and the\n\
10022 terminating `#' character and checksum."),
10025 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
10026 Set whether to send break if interrupted."), _("\
10027 Show whether to send break if interrupted."), _("\
10028 If set, a break, instead of a cntrl-c, is sent to the remote target."),
10029 set_remotebreak, show_remotebreak,
10030 &setlist, &showlist);
10031 cmd_name = "remotebreak";
10032 cmd = lookup_cmd (&cmd_name, setlist, "", -1, 1);
10033 deprecate_cmd (cmd, "set remote interrupt-sequence");
10034 cmd_name = "remotebreak"; /* needed because lookup_cmd updates the pointer */
10035 cmd = lookup_cmd (&cmd_name, showlist, "", -1, 1);
10036 deprecate_cmd (cmd, "show remote interrupt-sequence");
10038 add_setshow_enum_cmd ("interrupt-sequence", class_support,
10039 interrupt_sequence_modes, &interrupt_sequence_mode, _("\
10040 Set interrupt sequence to remote target."), _("\
10041 Show interrupt sequence to remote target."), _("\
10042 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
10043 NULL, show_interrupt_sequence,
10044 &remote_set_cmdlist,
10045 &remote_show_cmdlist);
10047 add_setshow_boolean_cmd ("interrupt-on-connect", class_support,
10048 &interrupt_on_connect, _("\
10049 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
10050 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
10051 If set, interrupt sequence is sent to remote target."),
10053 &remote_set_cmdlist, &remote_show_cmdlist);
10055 /* Install commands for configuring memory read/write packets. */
10057 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
10058 Set the maximum number of bytes per memory write packet (deprecated)."),
10060 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
10061 Show the maximum number of bytes per memory write packet (deprecated)."),
10063 add_cmd ("memory-write-packet-size", no_class,
10064 set_memory_write_packet_size, _("\
10065 Set the maximum number of bytes per memory-write packet.\n\
10066 Specify the number of bytes in a packet or 0 (zero) for the\n\
10067 default packet size. The actual limit is further reduced\n\
10068 dependent on the target. Specify ``fixed'' to disable the\n\
10069 further restriction and ``limit'' to enable that restriction."),
10070 &remote_set_cmdlist);
10071 add_cmd ("memory-read-packet-size", no_class,
10072 set_memory_read_packet_size, _("\
10073 Set the maximum number of bytes per memory-read packet.\n\
10074 Specify the number of bytes in a packet or 0 (zero) for the\n\
10075 default packet size. The actual limit is further reduced\n\
10076 dependent on the target. Specify ``fixed'' to disable the\n\
10077 further restriction and ``limit'' to enable that restriction."),
10078 &remote_set_cmdlist);
10079 add_cmd ("memory-write-packet-size", no_class,
10080 show_memory_write_packet_size,
10081 _("Show the maximum number of bytes per memory-write packet."),
10082 &remote_show_cmdlist);
10083 add_cmd ("memory-read-packet-size", no_class,
10084 show_memory_read_packet_size,
10085 _("Show the maximum number of bytes per memory-read packet."),
10086 &remote_show_cmdlist);
10088 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class,
10089 &remote_hw_watchpoint_limit, _("\
10090 Set the maximum number of target hardware watchpoints."), _("\
10091 Show the maximum number of target hardware watchpoints."), _("\
10092 Specify a negative limit for unlimited."),
10093 NULL, NULL, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
10094 &remote_set_cmdlist, &remote_show_cmdlist);
10095 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class,
10096 &remote_hw_breakpoint_limit, _("\
10097 Set the maximum number of target hardware breakpoints."), _("\
10098 Show the maximum number of target hardware breakpoints."), _("\
10099 Specify a negative limit for unlimited."),
10100 NULL, NULL, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
10101 &remote_set_cmdlist, &remote_show_cmdlist);
10103 add_setshow_integer_cmd ("remoteaddresssize", class_obscure,
10104 &remote_address_size, _("\
10105 Set the maximum size of the address (in bits) in a memory packet."), _("\
10106 Show the maximum size of the address (in bits) in a memory packet."), NULL,
10108 NULL, /* FIXME: i18n: */
10109 &setlist, &showlist);
10111 add_packet_config_cmd (&remote_protocol_packets[PACKET_X],
10112 "X", "binary-download", 1);
10114 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont],
10115 "vCont", "verbose-resume", 0);
10117 add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals],
10118 "QPassSignals", "pass-signals", 0);
10120 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol],
10121 "qSymbol", "symbol-lookup", 0);
10123 add_packet_config_cmd (&remote_protocol_packets[PACKET_P],
10124 "P", "set-register", 1);
10126 add_packet_config_cmd (&remote_protocol_packets[PACKET_p],
10127 "p", "fetch-register", 1);
10129 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0],
10130 "Z0", "software-breakpoint", 0);
10132 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1],
10133 "Z1", "hardware-breakpoint", 0);
10135 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2],
10136 "Z2", "write-watchpoint", 0);
10138 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3],
10139 "Z3", "read-watchpoint", 0);
10141 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4],
10142 "Z4", "access-watchpoint", 0);
10144 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv],
10145 "qXfer:auxv:read", "read-aux-vector", 0);
10147 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features],
10148 "qXfer:features:read", "target-features", 0);
10150 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries],
10151 "qXfer:libraries:read", "library-info", 0);
10153 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map],
10154 "qXfer:memory-map:read", "memory-map", 0);
10156 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read],
10157 "qXfer:spu:read", "read-spu-object", 0);
10159 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write],
10160 "qXfer:spu:write", "write-spu-object", 0);
10162 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata],
10163 "qXfer:osdata:read", "osdata", 0);
10165 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_threads],
10166 "qXfer:threads:read", "threads", 0);
10168 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read],
10169 "qXfer:siginfo:read", "read-siginfo-object", 0);
10171 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write],
10172 "qXfer:siginfo:write", "write-siginfo-object", 0);
10174 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
10175 "qGetTLSAddr", "get-thread-local-storage-address",
10178 add_packet_config_cmd (&remote_protocol_packets[PACKET_bc],
10179 "bc", "reverse-continue", 0);
10181 add_packet_config_cmd (&remote_protocol_packets[PACKET_bs],
10182 "bs", "reverse-step", 0);
10184 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported],
10185 "qSupported", "supported-packets", 0);
10187 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory],
10188 "qSearch:memory", "search-memory", 0);
10190 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open],
10191 "vFile:open", "hostio-open", 0);
10193 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread],
10194 "vFile:pread", "hostio-pread", 0);
10196 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite],
10197 "vFile:pwrite", "hostio-pwrite", 0);
10199 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close],
10200 "vFile:close", "hostio-close", 0);
10202 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink],
10203 "vFile:unlink", "hostio-unlink", 0);
10205 add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach],
10206 "vAttach", "attach", 0);
10208 add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
10211 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode],
10212 "QStartNoAckMode", "noack", 0);
10214 add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill],
10215 "vKill", "kill", 0);
10217 add_packet_config_cmd (&remote_protocol_packets[PACKET_qAttached],
10218 "qAttached", "query-attached", 0);
10220 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalTracepoints],
10221 "ConditionalTracepoints", "conditional-tracepoints", 0);
10222 add_packet_config_cmd (&remote_protocol_packets[PACKET_FastTracepoints],
10223 "FastTracepoints", "fast-tracepoints", 0);
10225 /* Keep the old ``set remote Z-packet ...'' working. Each individual
10226 Z sub-packet has its own set and show commands, but users may
10227 have sets to this variable in their .gdbinit files (or in their
10229 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
10230 &remote_Z_packet_detect, _("\
10231 Set use of remote protocol `Z' packets"), _("\
10232 Show use of remote protocol `Z' packets "), _("\
10233 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
10235 set_remote_protocol_Z_packet_cmd,
10236 show_remote_protocol_Z_packet_cmd, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
10237 &remote_set_cmdlist, &remote_show_cmdlist);
10239 add_prefix_cmd ("remote", class_files, remote_command, _("\
10240 Manipulate files on the remote system\n\
10241 Transfer files to and from the remote target system."),
10242 &remote_cmdlist, "remote ",
10243 0 /* allow-unknown */, &cmdlist);
10245 add_cmd ("put", class_files, remote_put_command,
10246 _("Copy a local file to the remote system."),
10249 add_cmd ("get", class_files, remote_get_command,
10250 _("Copy a remote file to the local system."),
10253 add_cmd ("delete", class_files, remote_delete_command,
10254 _("Delete a remote file."),
10257 remote_exec_file = xstrdup ("");
10258 add_setshow_string_noescape_cmd ("exec-file", class_files,
10259 &remote_exec_file, _("\
10260 Set the remote pathname for \"run\""), _("\
10261 Show the remote pathname for \"run\""), NULL, NULL, NULL,
10262 &remote_set_cmdlist, &remote_show_cmdlist);
10264 /* Eventually initialize fileio. See fileio.c */
10265 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
10267 /* Take advantage of the fact that the LWP field is not used, to tag
10268 special ptids with it set to != 0. */
10269 magic_null_ptid = ptid_build (42000, 1, -1);
10270 not_sent_ptid = ptid_build (42000, 1, -2);
10271 any_thread_ptid = ptid_build (42000, 1, 0);
10273 target_buf_size = 2048;
10274 target_buf = xmalloc (target_buf_size);