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, char ***tdp_actions,
76 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 /* Restart the remote side; this is an extended protocol operation. */
2688 extended_remote_restart (void)
2690 struct remote_state *rs = get_remote_state ();
2692 /* Send the restart command; for reasons I don't understand the
2693 remote side really expects a number after the "R". */
2694 xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0);
2697 remote_fileio_reset ();
2700 /* Clean up connection to a remote debugger. */
2703 remote_close (int quitting)
2705 if (remote_desc == NULL)
2706 return; /* already closed */
2708 /* Make sure we leave stdin registered in the event loop, and we
2709 don't leave the async SIGINT signal handler installed. */
2710 remote_terminal_ours ();
2712 serial_close (remote_desc);
2715 /* We don't have a connection to the remote stub anymore. Get rid
2716 of all the inferiors and their threads we were controlling. */
2717 discard_all_inferiors ();
2719 /* We're no longer interested in any of these events. */
2720 discard_pending_stop_replies (-1);
2722 if (remote_async_inferior_event_token)
2723 delete_async_event_handler (&remote_async_inferior_event_token);
2724 if (remote_async_get_pending_events_token)
2725 delete_async_event_handler (&remote_async_get_pending_events_token);
2728 /* Query the remote side for the text, data and bss offsets. */
2733 struct remote_state *rs = get_remote_state ();
2736 int lose, num_segments = 0, do_sections, do_segments;
2737 CORE_ADDR text_addr, data_addr, bss_addr, segments[2];
2738 struct section_offsets *offs;
2739 struct symfile_segment_data *data;
2741 if (symfile_objfile == NULL)
2744 putpkt ("qOffsets");
2745 getpkt (&rs->buf, &rs->buf_size, 0);
2748 if (buf[0] == '\000')
2749 return; /* Return silently. Stub doesn't support
2753 warning (_("Remote failure reply: %s"), buf);
2757 /* Pick up each field in turn. This used to be done with scanf, but
2758 scanf will make trouble if CORE_ADDR size doesn't match
2759 conversion directives correctly. The following code will work
2760 with any size of CORE_ADDR. */
2761 text_addr = data_addr = bss_addr = 0;
2765 if (strncmp (ptr, "Text=", 5) == 0)
2768 /* Don't use strtol, could lose on big values. */
2769 while (*ptr && *ptr != ';')
2770 text_addr = (text_addr << 4) + fromhex (*ptr++);
2772 if (strncmp (ptr, ";Data=", 6) == 0)
2775 while (*ptr && *ptr != ';')
2776 data_addr = (data_addr << 4) + fromhex (*ptr++);
2781 if (!lose && strncmp (ptr, ";Bss=", 5) == 0)
2784 while (*ptr && *ptr != ';')
2785 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
2787 if (bss_addr != data_addr)
2788 warning (_("Target reported unsupported offsets: %s"), buf);
2793 else if (strncmp (ptr, "TextSeg=", 8) == 0)
2796 /* Don't use strtol, could lose on big values. */
2797 while (*ptr && *ptr != ';')
2798 text_addr = (text_addr << 4) + fromhex (*ptr++);
2801 if (strncmp (ptr, ";DataSeg=", 9) == 0)
2804 while (*ptr && *ptr != ';')
2805 data_addr = (data_addr << 4) + fromhex (*ptr++);
2813 error (_("Malformed response to offset query, %s"), buf);
2814 else if (*ptr != '\0')
2815 warning (_("Target reported unsupported offsets: %s"), buf);
2817 offs = ((struct section_offsets *)
2818 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
2819 memcpy (offs, symfile_objfile->section_offsets,
2820 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
2822 data = get_symfile_segment_data (symfile_objfile->obfd);
2823 do_segments = (data != NULL);
2824 do_sections = num_segments == 0;
2826 if (num_segments > 0)
2828 segments[0] = text_addr;
2829 segments[1] = data_addr;
2831 /* If we have two segments, we can still try to relocate everything
2832 by assuming that the .text and .data offsets apply to the whole
2833 text and data segments. Convert the offsets given in the packet
2834 to base addresses for symfile_map_offsets_to_segments. */
2835 else if (data && data->num_segments == 2)
2837 segments[0] = data->segment_bases[0] + text_addr;
2838 segments[1] = data->segment_bases[1] + data_addr;
2841 /* If the object file has only one segment, assume that it is text
2842 rather than data; main programs with no writable data are rare,
2843 but programs with no code are useless. Of course the code might
2844 have ended up in the data segment... to detect that we would need
2845 the permissions here. */
2846 else if (data && data->num_segments == 1)
2848 segments[0] = data->segment_bases[0] + text_addr;
2851 /* There's no way to relocate by segment. */
2857 int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data,
2858 offs, num_segments, segments);
2860 if (ret == 0 && !do_sections)
2861 error (_("Can not handle qOffsets TextSeg response with this symbol file"));
2868 free_symfile_segment_data (data);
2872 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
2874 /* This is a temporary kludge to force data and bss to use the same offsets
2875 because that's what nlmconv does now. The real solution requires changes
2876 to the stub and remote.c that I don't have time to do right now. */
2878 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
2879 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
2882 objfile_relocate (symfile_objfile, offs);
2885 /* Callback for iterate_over_threads. Set the STOP_REQUESTED flags in
2886 threads we know are stopped already. This is used during the
2887 initial remote connection in non-stop mode --- threads that are
2888 reported as already being stopped are left stopped. */
2891 set_stop_requested_callback (struct thread_info *thread, void *data)
2893 /* If we have a stop reply for this thread, it must be stopped. */
2894 if (peek_stop_reply (thread->ptid))
2895 set_stop_requested (thread->ptid, 1);
2900 /* Stub for catch_exception. */
2902 struct start_remote_args
2906 /* The current target. */
2907 struct target_ops *target;
2909 /* Non-zero if this is an extended-remote target. */
2913 /* Send interrupt_sequence to remote target. */
2915 send_interrupt_sequence ()
2917 if (interrupt_sequence_mode == interrupt_sequence_control_c)
2918 serial_write (remote_desc, "\x03", 1);
2919 else if (interrupt_sequence_mode == interrupt_sequence_break)
2920 serial_send_break (remote_desc);
2921 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
2923 serial_send_break (remote_desc);
2924 serial_write (remote_desc, "g", 1);
2927 internal_error (__FILE__, __LINE__,
2928 _("Invalid value for interrupt_sequence_mode: %s."),
2929 interrupt_sequence_mode);
2933 remote_start_remote (struct ui_out *uiout, void *opaque)
2935 struct start_remote_args *args = opaque;
2936 struct remote_state *rs = get_remote_state ();
2937 struct packet_config *noack_config;
2938 char *wait_status = NULL;
2940 immediate_quit++; /* Allow user to interrupt it. */
2942 /* Ack any packet which the remote side has already sent. */
2943 serial_write (remote_desc, "+", 1);
2945 if (interrupt_on_connect)
2946 send_interrupt_sequence ();
2948 /* The first packet we send to the target is the optional "supported
2949 packets" request. If the target can answer this, it will tell us
2950 which later probes to skip. */
2951 remote_query_supported ();
2953 /* Next, we possibly activate noack mode.
2955 If the QStartNoAckMode packet configuration is set to AUTO,
2956 enable noack mode if the stub reported a wish for it with
2959 If set to TRUE, then enable noack mode even if the stub didn't
2960 report it in qSupported. If the stub doesn't reply OK, the
2961 session ends with an error.
2963 If FALSE, then don't activate noack mode, regardless of what the
2964 stub claimed should be the default with qSupported. */
2966 noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode];
2968 if (noack_config->detect == AUTO_BOOLEAN_TRUE
2969 || (noack_config->detect == AUTO_BOOLEAN_AUTO
2970 && noack_config->support == PACKET_ENABLE))
2972 putpkt ("QStartNoAckMode");
2973 getpkt (&rs->buf, &rs->buf_size, 0);
2974 if (packet_ok (rs->buf, noack_config) == PACKET_OK)
2978 if (args->extended_p)
2980 /* Tell the remote that we are using the extended protocol. */
2982 getpkt (&rs->buf, &rs->buf_size, 0);
2985 /* Next, if the target can specify a description, read it. We do
2986 this before anything involving memory or registers. */
2987 target_find_description ();
2989 /* Next, now that we know something about the target, update the
2990 address spaces in the program spaces. */
2991 update_address_spaces ();
2993 /* On OSs where the list of libraries is global to all
2994 processes, we fetch them early. */
2995 if (gdbarch_has_global_solist (target_gdbarch))
2996 solib_add (NULL, args->from_tty, args->target, auto_solib_add);
3000 if (!rs->non_stop_aware)
3001 error (_("Non-stop mode requested, but remote does not support non-stop"));
3003 putpkt ("QNonStop:1");
3004 getpkt (&rs->buf, &rs->buf_size, 0);
3006 if (strcmp (rs->buf, "OK") != 0)
3007 error ("Remote refused setting non-stop mode with: %s", rs->buf);
3009 /* Find about threads and processes the stub is already
3010 controlling. We default to adding them in the running state.
3011 The '?' query below will then tell us about which threads are
3013 remote_threads_info (args->target);
3015 else if (rs->non_stop_aware)
3017 /* Don't assume that the stub can operate in all-stop mode.
3018 Request it explicitely. */
3019 putpkt ("QNonStop:0");
3020 getpkt (&rs->buf, &rs->buf_size, 0);
3022 if (strcmp (rs->buf, "OK") != 0)
3023 error ("Remote refused setting all-stop mode with: %s", rs->buf);
3026 /* Check whether the target is running now. */
3028 getpkt (&rs->buf, &rs->buf_size, 0);
3032 if (rs->buf[0] == 'W' || rs->buf[0] == 'X')
3034 if (!args->extended_p)
3035 error (_("The target is not running (try extended-remote?)"));
3037 /* We're connected, but not running. Drop out before we
3038 call start_remote. */
3043 /* Save the reply for later. */
3044 wait_status = alloca (strlen (rs->buf) + 1);
3045 strcpy (wait_status, rs->buf);
3048 /* Let the stub know that we want it to return the thread. */
3049 set_continue_thread (minus_one_ptid);
3051 /* Without this, some commands which require an active target
3052 (such as kill) won't work. This variable serves (at least)
3053 double duty as both the pid of the target process (if it has
3054 such), and as a flag indicating that a target is active.
3055 These functions should be split out into seperate variables,
3056 especially since GDB will someday have a notion of debugging
3057 several processes. */
3058 inferior_ptid = magic_null_ptid;
3060 /* Now, if we have thread information, update inferior_ptid. */
3061 inferior_ptid = remote_current_thread (inferior_ptid);
3063 remote_add_inferior (ptid_get_pid (inferior_ptid), -1);
3065 /* Always add the main thread. */
3066 add_thread_silent (inferior_ptid);
3068 get_offsets (); /* Get text, data & bss offsets. */
3070 /* If we could not find a description using qXfer, and we know
3071 how to do it some other way, try again. This is not
3072 supported for non-stop; it could be, but it is tricky if
3073 there are no stopped threads when we connect. */
3074 if (remote_read_description_p (args->target)
3075 && gdbarch_target_desc (target_gdbarch) == NULL)
3077 target_clear_description ();
3078 target_find_description ();
3081 /* Use the previously fetched status. */
3082 gdb_assert (wait_status != NULL);
3083 strcpy (rs->buf, wait_status);
3084 rs->cached_wait_status = 1;
3087 start_remote (args->from_tty); /* Initialize gdb process mechanisms. */
3091 /* Clear WFI global state. Do this before finding about new
3092 threads and inferiors, and setting the current inferior.
3093 Otherwise we would clear the proceed status of the current
3094 inferior when we want its stop_soon state to be preserved
3095 (see notice_new_inferior). */
3096 init_wait_for_inferior ();
3098 /* In non-stop, we will either get an "OK", meaning that there
3099 are no stopped threads at this time; or, a regular stop
3100 reply. In the latter case, there may be more than one thread
3101 stopped --- we pull them all out using the vStopped
3103 if (strcmp (rs->buf, "OK") != 0)
3105 struct stop_reply *stop_reply;
3106 struct cleanup *old_chain;
3108 stop_reply = stop_reply_xmalloc ();
3109 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
3111 remote_parse_stop_reply (rs->buf, stop_reply);
3112 discard_cleanups (old_chain);
3114 /* get_pending_stop_replies acks this one, and gets the rest
3116 pending_stop_reply = stop_reply;
3117 remote_get_pending_stop_replies ();
3119 /* Make sure that threads that were stopped remain
3121 iterate_over_threads (set_stop_requested_callback, NULL);
3124 if (target_can_async_p ())
3125 target_async (inferior_event_handler, 0);
3127 if (thread_count () == 0)
3129 if (!args->extended_p)
3130 error (_("The target is not running (try extended-remote?)"));
3132 /* We're connected, but not running. Drop out before we
3133 call start_remote. */
3137 /* Let the stub know that we want it to return the thread. */
3139 /* Force the stub to choose a thread. */
3140 set_general_thread (null_ptid);
3143 inferior_ptid = remote_current_thread (minus_one_ptid);
3144 if (ptid_equal (inferior_ptid, minus_one_ptid))
3145 error (_("remote didn't report the current thread in non-stop mode"));
3147 get_offsets (); /* Get text, data & bss offsets. */
3149 /* In non-stop mode, any cached wait status will be stored in
3150 the stop reply queue. */
3151 gdb_assert (wait_status == NULL);
3154 /* If we connected to a live target, do some additional setup. */
3155 if (target_has_execution)
3157 if (exec_bfd) /* No use without an exec file. */
3158 remote_check_symbols (symfile_objfile);
3161 /* Possibly the target has been engaged in a trace run started
3162 previously; find out where things are at. */
3163 if (rs->disconnected_tracing)
3165 struct uploaded_tp *uploaded_tps = NULL;
3166 struct uploaded_tsv *uploaded_tsvs = NULL;
3168 remote_get_trace_status (current_trace_status ());
3169 if (current_trace_status ()->running)
3170 printf_filtered (_("Trace is already running on the target.\n"));
3172 /* Get trace state variables first, they may be checked when
3173 parsing uploaded commands. */
3175 remote_upload_trace_state_variables (&uploaded_tsvs);
3177 merge_uploaded_trace_state_variables (&uploaded_tsvs);
3179 remote_upload_tracepoints (&uploaded_tps);
3181 merge_uploaded_tracepoints (&uploaded_tps);
3184 /* If breakpoints are global, insert them now. */
3185 if (gdbarch_has_global_breakpoints (target_gdbarch)
3186 && breakpoints_always_inserted_mode ())
3187 insert_breakpoints ();
3190 /* Open a connection to a remote debugger.
3191 NAME is the filename used for communication. */
3194 remote_open (char *name, int from_tty)
3196 remote_open_1 (name, from_tty, &remote_ops, 0);
3199 /* Open a connection to a remote debugger using the extended
3200 remote gdb protocol. NAME is the filename used for communication. */
3203 extended_remote_open (char *name, int from_tty)
3205 remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */);
3208 /* Generic code for opening a connection to a remote target. */
3211 init_all_packet_configs (void)
3214 for (i = 0; i < PACKET_MAX; i++)
3215 update_packet_config (&remote_protocol_packets[i]);
3218 /* Symbol look-up. */
3221 remote_check_symbols (struct objfile *objfile)
3223 struct remote_state *rs = get_remote_state ();
3224 char *msg, *reply, *tmp;
3225 struct minimal_symbol *sym;
3228 if (remote_protocol_packets[PACKET_qSymbol].support == PACKET_DISABLE)
3231 /* Make sure the remote is pointing at the right process. */
3232 set_general_process ();
3234 /* Allocate a message buffer. We can't reuse the input buffer in RS,
3235 because we need both at the same time. */
3236 msg = alloca (get_remote_packet_size ());
3238 /* Invite target to request symbol lookups. */
3240 putpkt ("qSymbol::");
3241 getpkt (&rs->buf, &rs->buf_size, 0);
3242 packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSymbol]);
3245 while (strncmp (reply, "qSymbol:", 8) == 0)
3248 end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2);
3250 sym = lookup_minimal_symbol (msg, NULL, NULL);
3252 xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]);
3255 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
3256 CORE_ADDR sym_addr = SYMBOL_VALUE_ADDRESS (sym);
3258 /* If this is a function address, return the start of code
3259 instead of any data function descriptor. */
3260 sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch,
3264 xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s",
3265 phex_nz (sym_addr, addr_size), &reply[8]);
3269 getpkt (&rs->buf, &rs->buf_size, 0);
3274 static struct serial *
3275 remote_serial_open (char *name)
3277 static int udp_warning = 0;
3279 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
3280 of in ser-tcp.c, because it is the remote protocol assuming that the
3281 serial connection is reliable and not the serial connection promising
3283 if (!udp_warning && strncmp (name, "udp:", 4) == 0)
3286 The remote protocol may be unreliable over UDP.\n\
3287 Some events may be lost, rendering further debugging impossible."));
3291 return serial_open (name);
3294 /* This type describes each known response to the qSupported
3296 struct protocol_feature
3298 /* The name of this protocol feature. */
3301 /* The default for this protocol feature. */
3302 enum packet_support default_support;
3304 /* The function to call when this feature is reported, or after
3305 qSupported processing if the feature is not supported.
3306 The first argument points to this structure. The second
3307 argument indicates whether the packet requested support be
3308 enabled, disabled, or probed (or the default, if this function
3309 is being called at the end of processing and this feature was
3310 not reported). The third argument may be NULL; if not NULL, it
3311 is a NUL-terminated string taken from the packet following
3312 this feature's name and an equals sign. */
3313 void (*func) (const struct protocol_feature *, enum packet_support,
3316 /* The corresponding packet for this feature. Only used if
3317 FUNC is remote_supported_packet. */
3322 remote_supported_packet (const struct protocol_feature *feature,
3323 enum packet_support support,
3324 const char *argument)
3328 warning (_("Remote qSupported response supplied an unexpected value for"
3329 " \"%s\"."), feature->name);
3333 if (remote_protocol_packets[feature->packet].support
3334 == PACKET_SUPPORT_UNKNOWN)
3335 remote_protocol_packets[feature->packet].support = support;
3339 remote_packet_size (const struct protocol_feature *feature,
3340 enum packet_support support, const char *value)
3342 struct remote_state *rs = get_remote_state ();
3347 if (support != PACKET_ENABLE)
3350 if (value == NULL || *value == '\0')
3352 warning (_("Remote target reported \"%s\" without a size."),
3358 packet_size = strtol (value, &value_end, 16);
3359 if (errno != 0 || *value_end != '\0' || packet_size < 0)
3361 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
3362 feature->name, value);
3366 if (packet_size > MAX_REMOTE_PACKET_SIZE)
3368 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
3369 packet_size, MAX_REMOTE_PACKET_SIZE);
3370 packet_size = MAX_REMOTE_PACKET_SIZE;
3373 /* Record the new maximum packet size. */
3374 rs->explicit_packet_size = packet_size;
3378 remote_multi_process_feature (const struct protocol_feature *feature,
3379 enum packet_support support, const char *value)
3381 struct remote_state *rs = get_remote_state ();
3382 rs->multi_process_aware = (support == PACKET_ENABLE);
3386 remote_non_stop_feature (const struct protocol_feature *feature,
3387 enum packet_support support, const char *value)
3389 struct remote_state *rs = get_remote_state ();
3390 rs->non_stop_aware = (support == PACKET_ENABLE);
3394 remote_cond_tracepoint_feature (const struct protocol_feature *feature,
3395 enum packet_support support,
3398 struct remote_state *rs = get_remote_state ();
3399 rs->cond_tracepoints = (support == PACKET_ENABLE);
3403 remote_fast_tracepoint_feature (const struct protocol_feature *feature,
3404 enum packet_support support,
3407 struct remote_state *rs = get_remote_state ();
3408 rs->fast_tracepoints = (support == PACKET_ENABLE);
3412 remote_disconnected_tracing_feature (const struct protocol_feature *feature,
3413 enum packet_support support,
3416 struct remote_state *rs = get_remote_state ();
3417 rs->disconnected_tracing = (support == PACKET_ENABLE);
3420 static struct protocol_feature remote_protocol_features[] = {
3421 { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
3422 { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
3423 PACKET_qXfer_auxv },
3424 { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet,
3425 PACKET_qXfer_features },
3426 { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet,
3427 PACKET_qXfer_libraries },
3428 { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet,
3429 PACKET_qXfer_memory_map },
3430 { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet,
3431 PACKET_qXfer_spu_read },
3432 { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet,
3433 PACKET_qXfer_spu_write },
3434 { "qXfer:osdata:read", PACKET_DISABLE, remote_supported_packet,
3435 PACKET_qXfer_osdata },
3436 { "qXfer:threads:read", PACKET_DISABLE, remote_supported_packet,
3437 PACKET_qXfer_threads },
3438 { "QPassSignals", PACKET_DISABLE, remote_supported_packet,
3439 PACKET_QPassSignals },
3440 { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet,
3441 PACKET_QStartNoAckMode },
3442 { "multiprocess", PACKET_DISABLE, remote_multi_process_feature, -1 },
3443 { "QNonStop", PACKET_DISABLE, remote_non_stop_feature, -1 },
3444 { "qXfer:siginfo:read", PACKET_DISABLE, remote_supported_packet,
3445 PACKET_qXfer_siginfo_read },
3446 { "qXfer:siginfo:write", PACKET_DISABLE, remote_supported_packet,
3447 PACKET_qXfer_siginfo_write },
3448 { "ConditionalTracepoints", PACKET_DISABLE, remote_cond_tracepoint_feature,
3449 PACKET_ConditionalTracepoints },
3450 { "FastTracepoints", PACKET_DISABLE, remote_fast_tracepoint_feature,
3451 PACKET_FastTracepoints },
3452 { "DisconnectedTracing", PACKET_DISABLE, remote_disconnected_tracing_feature,
3454 { "ReverseContinue", PACKET_DISABLE, remote_supported_packet,
3456 { "ReverseStep", PACKET_DISABLE, remote_supported_packet,
3461 remote_query_supported (void)
3463 struct remote_state *rs = get_remote_state ();
3466 unsigned char seen [ARRAY_SIZE (remote_protocol_features)];
3468 /* The packet support flags are handled differently for this packet
3469 than for most others. We treat an error, a disabled packet, and
3470 an empty response identically: any features which must be reported
3471 to be used will be automatically disabled. An empty buffer
3472 accomplishes this, since that is also the representation for a list
3473 containing no features. */
3476 if (remote_protocol_packets[PACKET_qSupported].support != PACKET_DISABLE)
3478 const char *qsupported = gdbarch_qsupported (target_gdbarch);
3483 q = concat ("qSupported:multiprocess+;", qsupported, NULL);
3485 q = concat ("qSupported:", qsupported, NULL);
3492 putpkt ("qSupported:multiprocess+");
3494 putpkt ("qSupported");
3497 getpkt (&rs->buf, &rs->buf_size, 0);
3499 /* If an error occured, warn, but do not return - just reset the
3500 buffer to empty and go on to disable features. */
3501 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported])
3504 warning (_("Remote failure reply: %s"), rs->buf);
3509 memset (seen, 0, sizeof (seen));
3514 enum packet_support is_supported;
3515 char *p, *end, *name_end, *value;
3517 /* First separate out this item from the rest of the packet. If
3518 there's another item after this, we overwrite the separator
3519 (terminated strings are much easier to work with). */
3521 end = strchr (p, ';');
3524 end = p + strlen (p);
3534 warning (_("empty item in \"qSupported\" response"));
3539 name_end = strchr (p, '=');
3542 /* This is a name=value entry. */
3543 is_supported = PACKET_ENABLE;
3544 value = name_end + 1;
3553 is_supported = PACKET_ENABLE;
3557 is_supported = PACKET_DISABLE;
3561 is_supported = PACKET_SUPPORT_UNKNOWN;
3565 warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p);
3571 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
3572 if (strcmp (remote_protocol_features[i].name, p) == 0)
3574 const struct protocol_feature *feature;
3577 feature = &remote_protocol_features[i];
3578 feature->func (feature, is_supported, value);
3583 /* If we increased the packet size, make sure to increase the global
3584 buffer size also. We delay this until after parsing the entire
3585 qSupported packet, because this is the same buffer we were
3587 if (rs->buf_size < rs->explicit_packet_size)
3589 rs->buf_size = rs->explicit_packet_size;
3590 rs->buf = xrealloc (rs->buf, rs->buf_size);
3593 /* Handle the defaults for unmentioned features. */
3594 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
3597 const struct protocol_feature *feature;
3599 feature = &remote_protocol_features[i];
3600 feature->func (feature, feature->default_support, NULL);
3606 remote_open_1 (char *name, int from_tty, struct target_ops *target, int extended_p)
3608 struct remote_state *rs = get_remote_state ();
3611 error (_("To open a remote debug connection, you need to specify what\n"
3612 "serial device is attached to the remote system\n"
3613 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
3615 /* See FIXME above. */
3616 if (!target_async_permitted)
3617 wait_forever_enabled_p = 1;
3619 /* If we're connected to a running target, target_preopen will kill it.
3620 But if we're connected to a target system with no running process,
3621 then we will still be connected when it returns. Ask this question
3622 first, before target_preopen has a chance to kill anything. */
3623 if (remote_desc != NULL && !have_inferiors ())
3626 || query (_("Already connected to a remote target. Disconnect? ")))
3629 error (_("Still connected."));
3632 target_preopen (from_tty);
3634 unpush_target (target);
3636 /* This time without a query. If we were connected to an
3637 extended-remote target and target_preopen killed the running
3638 process, we may still be connected. If we are starting "target
3639 remote" now, the extended-remote target will not have been
3640 removed by unpush_target. */
3641 if (remote_desc != NULL && !have_inferiors ())
3644 /* Make sure we send the passed signals list the next time we resume. */
3645 xfree (last_pass_packet);
3646 last_pass_packet = NULL;
3648 remote_fileio_reset ();
3649 reopen_exec_file ();
3652 remote_desc = remote_serial_open (name);
3654 perror_with_name (name);
3656 if (baud_rate != -1)
3658 if (serial_setbaudrate (remote_desc, baud_rate))
3660 /* The requested speed could not be set. Error out to
3661 top level after closing remote_desc. Take care to
3662 set remote_desc to NULL to avoid closing remote_desc
3664 serial_close (remote_desc);
3666 perror_with_name (name);
3670 serial_raw (remote_desc);
3672 /* If there is something sitting in the buffer we might take it as a
3673 response to a command, which would be bad. */
3674 serial_flush_input (remote_desc);
3678 puts_filtered ("Remote debugging using ");
3679 puts_filtered (name);
3680 puts_filtered ("\n");
3682 push_target (target); /* Switch to using remote target now. */
3684 /* Register extra event sources in the event loop. */
3685 remote_async_inferior_event_token
3686 = create_async_event_handler (remote_async_inferior_event_handler,
3688 remote_async_get_pending_events_token
3689 = create_async_event_handler (remote_async_get_pending_events_handler,
3692 /* Reset the target state; these things will be queried either by
3693 remote_query_supported or as they are needed. */
3694 init_all_packet_configs ();
3695 rs->cached_wait_status = 0;
3696 rs->explicit_packet_size = 0;
3698 rs->multi_process_aware = 0;
3699 rs->extended = extended_p;
3700 rs->non_stop_aware = 0;
3701 rs->waiting_for_stop_reply = 0;
3702 rs->ctrlc_pending_p = 0;
3704 general_thread = not_sent_ptid;
3705 continue_thread = not_sent_ptid;
3707 /* Probe for ability to use "ThreadInfo" query, as required. */
3708 use_threadinfo_query = 1;
3709 use_threadextra_query = 1;
3711 if (target_async_permitted)
3713 /* With this target we start out by owning the terminal. */
3714 remote_async_terminal_ours_p = 1;
3716 /* FIXME: cagney/1999-09-23: During the initial connection it is
3717 assumed that the target is already ready and able to respond to
3718 requests. Unfortunately remote_start_remote() eventually calls
3719 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
3720 around this. Eventually a mechanism that allows
3721 wait_for_inferior() to expect/get timeouts will be
3723 wait_forever_enabled_p = 0;
3726 /* First delete any symbols previously loaded from shared libraries. */
3727 no_shared_libraries (NULL, 0);
3730 init_thread_list ();
3732 /* Start the remote connection. If error() or QUIT, discard this
3733 target (we'd otherwise be in an inconsistent state) and then
3734 propogate the error on up the exception chain. This ensures that
3735 the caller doesn't stumble along blindly assuming that the
3736 function succeeded. The CLI doesn't have this problem but other
3737 UI's, such as MI do.
3739 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
3740 this function should return an error indication letting the
3741 caller restore the previous state. Unfortunately the command
3742 ``target remote'' is directly wired to this function making that
3743 impossible. On a positive note, the CLI side of this problem has
3744 been fixed - the function set_cmd_context() makes it possible for
3745 all the ``target ....'' commands to share a common callback
3746 function. See cli-dump.c. */
3748 struct gdb_exception ex;
3749 struct start_remote_args args;
3751 args.from_tty = from_tty;
3752 args.target = target;
3753 args.extended_p = extended_p;
3755 ex = catch_exception (uiout, remote_start_remote, &args, RETURN_MASK_ALL);
3758 /* Pop the partially set up target - unless something else did
3759 already before throwing the exception. */
3760 if (remote_desc != NULL)
3762 if (target_async_permitted)
3763 wait_forever_enabled_p = 1;
3764 throw_exception (ex);
3768 if (target_async_permitted)
3769 wait_forever_enabled_p = 1;
3772 /* This takes a program previously attached to and detaches it. After
3773 this is done, GDB can be used to debug some other program. We
3774 better not have left any breakpoints in the target program or it'll
3775 die when it hits one. */
3778 remote_detach_1 (char *args, int from_tty, int extended)
3780 int pid = ptid_get_pid (inferior_ptid);
3781 struct remote_state *rs = get_remote_state ();
3784 error (_("Argument given to \"detach\" when remotely debugging."));
3786 if (!target_has_execution)
3787 error (_("No process to detach from."));
3789 /* Tell the remote target to detach. */
3790 if (remote_multi_process_p (rs))
3791 sprintf (rs->buf, "D;%x", pid);
3793 strcpy (rs->buf, "D");
3796 getpkt (&rs->buf, &rs->buf_size, 0);
3798 if (rs->buf[0] == 'O' && rs->buf[1] == 'K')
3800 else if (rs->buf[0] == '\0')
3801 error (_("Remote doesn't know how to detach"));
3803 error (_("Can't detach process."));
3807 if (remote_multi_process_p (rs))
3808 printf_filtered (_("Detached from remote %s.\n"),
3809 target_pid_to_str (pid_to_ptid (pid)));
3813 puts_filtered (_("Detached from remote process.\n"));
3815 puts_filtered (_("Ending remote debugging.\n"));
3819 discard_pending_stop_replies (pid);
3820 target_mourn_inferior ();
3824 remote_detach (struct target_ops *ops, char *args, int from_tty)
3826 remote_detach_1 (args, from_tty, 0);
3830 extended_remote_detach (struct target_ops *ops, char *args, int from_tty)
3832 remote_detach_1 (args, from_tty, 1);
3835 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
3838 remote_disconnect (struct target_ops *target, char *args, int from_tty)
3841 error (_("Argument given to \"disconnect\" when remotely debugging."));
3843 /* Make sure we unpush even the extended remote targets; mourn
3844 won't do it. So call remote_mourn_1 directly instead of
3845 target_mourn_inferior. */
3846 remote_mourn_1 (target);
3849 puts_filtered ("Ending remote debugging.\n");
3852 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
3853 be chatty about it. */
3856 extended_remote_attach_1 (struct target_ops *target, char *args, int from_tty)
3858 struct remote_state *rs = get_remote_state ();
3860 char *wait_status = NULL;
3862 pid = parse_pid_to_attach (args);
3864 /* Remote PID can be freely equal to getpid, do not check it here the same
3865 way as in other targets. */
3867 if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE)
3868 error (_("This target does not support attaching to a process"));
3870 sprintf (rs->buf, "vAttach;%x", pid);
3872 getpkt (&rs->buf, &rs->buf_size, 0);
3874 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vAttach]) == PACKET_OK)
3877 printf_unfiltered (_("Attached to %s\n"),
3878 target_pid_to_str (pid_to_ptid (pid)));
3882 /* Save the reply for later. */
3883 wait_status = alloca (strlen (rs->buf) + 1);
3884 strcpy (wait_status, rs->buf);
3886 else if (strcmp (rs->buf, "OK") != 0)
3887 error (_("Attaching to %s failed with: %s"),
3888 target_pid_to_str (pid_to_ptid (pid)),
3891 else if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE)
3892 error (_("This target does not support attaching to a process"));
3894 error (_("Attaching to %s failed"),
3895 target_pid_to_str (pid_to_ptid (pid)));
3897 set_current_inferior (remote_add_inferior (pid, 1));
3899 inferior_ptid = pid_to_ptid (pid);
3903 struct thread_info *thread;
3905 /* Get list of threads. */
3906 remote_threads_info (target);
3908 thread = first_thread_of_process (pid);
3910 inferior_ptid = thread->ptid;
3912 inferior_ptid = pid_to_ptid (pid);
3914 /* Invalidate our notion of the remote current thread. */
3915 record_currthread (minus_one_ptid);
3919 /* Now, if we have thread information, update inferior_ptid. */
3920 inferior_ptid = remote_current_thread (inferior_ptid);
3922 /* Add the main thread to the thread list. */
3923 add_thread_silent (inferior_ptid);
3926 /* Next, if the target can specify a description, read it. We do
3927 this before anything involving memory or registers. */
3928 target_find_description ();
3932 /* Use the previously fetched status. */
3933 gdb_assert (wait_status != NULL);
3935 if (target_can_async_p ())
3937 struct stop_reply *stop_reply;
3938 struct cleanup *old_chain;
3940 stop_reply = stop_reply_xmalloc ();
3941 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
3942 remote_parse_stop_reply (wait_status, stop_reply);
3943 discard_cleanups (old_chain);
3944 push_stop_reply (stop_reply);
3946 target_async (inferior_event_handler, 0);
3950 gdb_assert (wait_status != NULL);
3951 strcpy (rs->buf, wait_status);
3952 rs->cached_wait_status = 1;
3956 gdb_assert (wait_status == NULL);
3960 extended_remote_attach (struct target_ops *ops, char *args, int from_tty)
3962 extended_remote_attach_1 (ops, args, from_tty);
3965 /* Convert hex digit A to a number. */
3970 if (a >= '0' && a <= '9')
3972 else if (a >= 'a' && a <= 'f')
3973 return a - 'a' + 10;
3974 else if (a >= 'A' && a <= 'F')
3975 return a - 'A' + 10;
3977 error (_("Reply contains invalid hex digit %d"), a);
3981 hex2bin (const char *hex, gdb_byte *bin, int count)
3985 for (i = 0; i < count; i++)
3987 if (hex[0] == 0 || hex[1] == 0)
3989 /* Hex string is short, or of uneven length.
3990 Return the count that has been converted so far. */
3993 *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]);
3999 /* Convert number NIB to a hex digit. */
4007 return 'a' + nib - 10;
4011 bin2hex (const gdb_byte *bin, char *hex, int count)
4014 /* May use a length, or a nul-terminated string as input. */
4016 count = strlen ((char *) bin);
4018 for (i = 0; i < count; i++)
4020 *hex++ = tohex ((*bin >> 4) & 0xf);
4021 *hex++ = tohex (*bin++ & 0xf);
4027 /* Check for the availability of vCont. This function should also check
4031 remote_vcont_probe (struct remote_state *rs)
4035 strcpy (rs->buf, "vCont?");
4037 getpkt (&rs->buf, &rs->buf_size, 0);
4040 /* Make sure that the features we assume are supported. */
4041 if (strncmp (buf, "vCont", 5) == 0)
4044 int support_s, support_S, support_c, support_C;
4050 rs->support_vCont_t = 0;
4051 while (p && *p == ';')
4054 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
4056 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
4058 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
4060 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
4062 else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0))
4063 rs->support_vCont_t = 1;
4065 p = strchr (p, ';');
4068 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
4069 BUF will make packet_ok disable the packet. */
4070 if (!support_s || !support_S || !support_c || !support_C)
4074 packet_ok (buf, &remote_protocol_packets[PACKET_vCont]);
4077 /* Helper function for building "vCont" resumptions. Write a
4078 resumption to P. ENDP points to one-passed-the-end of the buffer
4079 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
4080 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
4081 resumed thread should be single-stepped and/or signalled. If PTID
4082 equals minus_one_ptid, then all threads are resumed; if PTID
4083 represents a process, then all threads of the process are resumed;
4084 the thread to be stepped and/or signalled is given in the global
4088 append_resumption (char *p, char *endp,
4089 ptid_t ptid, int step, enum target_signal siggnal)
4091 struct remote_state *rs = get_remote_state ();
4093 if (step && siggnal != TARGET_SIGNAL_0)
4094 p += xsnprintf (p, endp - p, ";S%02x", siggnal);
4096 p += xsnprintf (p, endp - p, ";s");
4097 else if (siggnal != TARGET_SIGNAL_0)
4098 p += xsnprintf (p, endp - p, ";C%02x", siggnal);
4100 p += xsnprintf (p, endp - p, ";c");
4102 if (remote_multi_process_p (rs) && ptid_is_pid (ptid))
4106 /* All (-1) threads of process. */
4107 nptid = ptid_build (ptid_get_pid (ptid), 0, -1);
4109 p += xsnprintf (p, endp - p, ":");
4110 p = write_ptid (p, endp, nptid);
4112 else if (!ptid_equal (ptid, minus_one_ptid))
4114 p += xsnprintf (p, endp - p, ":");
4115 p = write_ptid (p, endp, ptid);
4121 /* Resume the remote inferior by using a "vCont" packet. The thread
4122 to be resumed is PTID; STEP and SIGGNAL indicate whether the
4123 resumed thread should be single-stepped and/or signalled. If PTID
4124 equals minus_one_ptid, then all threads are resumed; the thread to
4125 be stepped and/or signalled is given in the global INFERIOR_PTID.
4126 This function returns non-zero iff it resumes the inferior.
4128 This function issues a strict subset of all possible vCont commands at the
4132 remote_vcont_resume (ptid_t ptid, int step, enum target_signal siggnal)
4134 struct remote_state *rs = get_remote_state ();
4138 if (remote_protocol_packets[PACKET_vCont].support == PACKET_SUPPORT_UNKNOWN)
4139 remote_vcont_probe (rs);
4141 if (remote_protocol_packets[PACKET_vCont].support == PACKET_DISABLE)
4145 endp = rs->buf + get_remote_packet_size ();
4147 /* If we could generate a wider range of packets, we'd have to worry
4148 about overflowing BUF. Should there be a generic
4149 "multi-part-packet" packet? */
4151 p += xsnprintf (p, endp - p, "vCont");
4153 if (ptid_equal (ptid, magic_null_ptid))
4155 /* MAGIC_NULL_PTID means that we don't have any active threads,
4156 so we don't have any TID numbers the inferior will
4157 understand. Make sure to only send forms that do not specify
4159 p = append_resumption (p, endp, minus_one_ptid, step, siggnal);
4161 else if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid))
4163 /* Resume all threads (of all processes, or of a single
4164 process), with preference for INFERIOR_PTID. This assumes
4165 inferior_ptid belongs to the set of all threads we are about
4167 if (step || siggnal != TARGET_SIGNAL_0)
4169 /* Step inferior_ptid, with or without signal. */
4170 p = append_resumption (p, endp, inferior_ptid, step, siggnal);
4173 /* And continue others without a signal. */
4174 p = append_resumption (p, endp, ptid, /*step=*/ 0, TARGET_SIGNAL_0);
4178 /* Scheduler locking; resume only PTID. */
4179 p = append_resumption (p, endp, ptid, step, siggnal);
4182 gdb_assert (strlen (rs->buf) < get_remote_packet_size ());
4187 /* In non-stop, the stub replies to vCont with "OK". The stop
4188 reply will be reported asynchronously by means of a `%Stop'
4190 getpkt (&rs->buf, &rs->buf_size, 0);
4191 if (strcmp (rs->buf, "OK") != 0)
4192 error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf);
4198 /* Tell the remote machine to resume. */
4200 static enum target_signal last_sent_signal = TARGET_SIGNAL_0;
4202 static int last_sent_step;
4205 remote_resume (struct target_ops *ops,
4206 ptid_t ptid, int step, enum target_signal siggnal)
4208 struct remote_state *rs = get_remote_state ();
4211 last_sent_signal = siggnal;
4212 last_sent_step = step;
4214 /* Update the inferior on signals to silently pass, if they've changed. */
4215 remote_pass_signals ();
4217 /* The vCont packet doesn't need to specify threads via Hc. */
4218 /* No reverse support (yet) for vCont. */
4219 if (execution_direction != EXEC_REVERSE)
4220 if (remote_vcont_resume (ptid, step, siggnal))
4223 /* All other supported resume packets do use Hc, so set the continue
4225 if (ptid_equal (ptid, minus_one_ptid))
4226 set_continue_thread (any_thread_ptid);
4228 set_continue_thread (ptid);
4231 if (execution_direction == EXEC_REVERSE)
4233 /* We don't pass signals to the target in reverse exec mode. */
4234 if (info_verbose && siggnal != TARGET_SIGNAL_0)
4235 warning (" - Can't pass signal %d to target in reverse: ignored.\n",
4239 && remote_protocol_packets[PACKET_bs].support == PACKET_DISABLE)
4240 error (_("Remote reverse-step not supported."));
4242 && remote_protocol_packets[PACKET_bc].support == PACKET_DISABLE)
4243 error (_("Remote reverse-continue not supported."));
4245 strcpy (buf, step ? "bs" : "bc");
4247 else if (siggnal != TARGET_SIGNAL_0)
4249 buf[0] = step ? 'S' : 'C';
4250 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
4251 buf[2] = tohex (((int) siggnal) & 0xf);
4255 strcpy (buf, step ? "s" : "c");
4260 /* We are about to start executing the inferior, let's register it
4261 with the event loop. NOTE: this is the one place where all the
4262 execution commands end up. We could alternatively do this in each
4263 of the execution commands in infcmd.c. */
4264 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
4265 into infcmd.c in order to allow inferior function calls to work
4266 NOT asynchronously. */
4267 if (target_can_async_p ())
4268 target_async (inferior_event_handler, 0);
4270 /* We've just told the target to resume. The remote server will
4271 wait for the inferior to stop, and then send a stop reply. In
4272 the mean time, we can't start another command/query ourselves
4273 because the stub wouldn't be ready to process it. This applies
4274 only to the base all-stop protocol, however. In non-stop (which
4275 only supports vCont), the stub replies with an "OK", and is
4276 immediate able to process further serial input. */
4278 rs->waiting_for_stop_reply = 1;
4282 /* Set up the signal handler for SIGINT, while the target is
4283 executing, ovewriting the 'regular' SIGINT signal handler. */
4285 initialize_sigint_signal_handler (void)
4287 signal (SIGINT, handle_remote_sigint);
4290 /* Signal handler for SIGINT, while the target is executing. */
4292 handle_remote_sigint (int sig)
4294 signal (sig, handle_remote_sigint_twice);
4295 mark_async_signal_handler_wrapper (sigint_remote_token);
4298 /* Signal handler for SIGINT, installed after SIGINT has already been
4299 sent once. It will take effect the second time that the user sends
4302 handle_remote_sigint_twice (int sig)
4304 signal (sig, handle_remote_sigint);
4305 mark_async_signal_handler_wrapper (sigint_remote_twice_token);
4308 /* Perform the real interruption of the target execution, in response
4311 async_remote_interrupt (gdb_client_data arg)
4314 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
4316 target_stop (inferior_ptid);
4319 /* Perform interrupt, if the first attempt did not succeed. Just give
4320 up on the target alltogether. */
4322 async_remote_interrupt_twice (gdb_client_data arg)
4325 fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n");
4330 /* Reinstall the usual SIGINT handlers, after the target has
4333 cleanup_sigint_signal_handler (void *dummy)
4335 signal (SIGINT, handle_sigint);
4338 /* Send ^C to target to halt it. Target will respond, and send us a
4340 static void (*ofunc) (int);
4342 /* The command line interface's stop routine. This function is installed
4343 as a signal handler for SIGINT. The first time a user requests a
4344 stop, we call remote_stop to send a break or ^C. If there is no
4345 response from the target (it didn't stop when the user requested it),
4346 we ask the user if he'd like to detach from the target. */
4348 remote_interrupt (int signo)
4350 /* If this doesn't work, try more severe steps. */
4351 signal (signo, remote_interrupt_twice);
4353 gdb_call_async_signal_handler (sigint_remote_token, 1);
4356 /* The user typed ^C twice. */
4359 remote_interrupt_twice (int signo)
4361 signal (signo, ofunc);
4362 gdb_call_async_signal_handler (sigint_remote_twice_token, 1);
4363 signal (signo, remote_interrupt);
4366 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
4367 thread, all threads of a remote process, or all threads of all
4371 remote_stop_ns (ptid_t ptid)
4373 struct remote_state *rs = get_remote_state ();
4375 char *endp = rs->buf + get_remote_packet_size ();
4377 if (remote_protocol_packets[PACKET_vCont].support == PACKET_SUPPORT_UNKNOWN)
4378 remote_vcont_probe (rs);
4380 if (!rs->support_vCont_t)
4381 error (_("Remote server does not support stopping threads"));
4383 if (ptid_equal (ptid, minus_one_ptid)
4384 || (!remote_multi_process_p (rs) && ptid_is_pid (ptid)))
4385 p += xsnprintf (p, endp - p, "vCont;t");
4390 p += xsnprintf (p, endp - p, "vCont;t:");
4392 if (ptid_is_pid (ptid))
4393 /* All (-1) threads of process. */
4394 nptid = ptid_build (ptid_get_pid (ptid), 0, -1);
4397 /* Small optimization: if we already have a stop reply for
4398 this thread, no use in telling the stub we want this
4400 if (peek_stop_reply (ptid))
4406 p = write_ptid (p, endp, nptid);
4409 /* In non-stop, we get an immediate OK reply. The stop reply will
4410 come in asynchronously by notification. */
4412 getpkt (&rs->buf, &rs->buf_size, 0);
4413 if (strcmp (rs->buf, "OK") != 0)
4414 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid), rs->buf);
4417 /* All-stop version of target_stop. Sends a break or a ^C to stop the
4418 remote target. It is undefined which thread of which process
4419 reports the stop. */
4422 remote_stop_as (ptid_t ptid)
4424 struct remote_state *rs = get_remote_state ();
4426 rs->ctrlc_pending_p = 1;
4428 /* If the inferior is stopped already, but the core didn't know
4429 about it yet, just ignore the request. The cached wait status
4430 will be collected in remote_wait. */
4431 if (rs->cached_wait_status)
4434 /* Send interrupt_sequence to remote target. */
4435 send_interrupt_sequence ();
4438 /* This is the generic stop called via the target vector. When a target
4439 interrupt is requested, either by the command line or the GUI, we
4440 will eventually end up here. */
4443 remote_stop (ptid_t ptid)
4446 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
4449 remote_stop_ns (ptid);
4451 remote_stop_as (ptid);
4454 /* Ask the user what to do when an interrupt is received. */
4457 interrupt_query (void)
4459 target_terminal_ours ();
4461 if (target_can_async_p ())
4463 signal (SIGINT, handle_sigint);
4464 deprecated_throw_reason (RETURN_QUIT);
4468 if (query (_("Interrupted while waiting for the program.\n\
4469 Give up (and stop debugging it)? ")))
4472 deprecated_throw_reason (RETURN_QUIT);
4476 target_terminal_inferior ();
4479 /* Enable/disable target terminal ownership. Most targets can use
4480 terminal groups to control terminal ownership. Remote targets are
4481 different in that explicit transfer of ownership to/from GDB/target
4485 remote_terminal_inferior (void)
4487 if (!target_async_permitted)
4488 /* Nothing to do. */
4491 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
4492 idempotent. The event-loop GDB talking to an asynchronous target
4493 with a synchronous command calls this function from both
4494 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
4495 transfer the terminal to the target when it shouldn't this guard
4497 if (!remote_async_terminal_ours_p)
4499 delete_file_handler (input_fd);
4500 remote_async_terminal_ours_p = 0;
4501 initialize_sigint_signal_handler ();
4502 /* NOTE: At this point we could also register our selves as the
4503 recipient of all input. Any characters typed could then be
4504 passed on down to the target. */
4508 remote_terminal_ours (void)
4510 if (!target_async_permitted)
4511 /* Nothing to do. */
4514 /* See FIXME in remote_terminal_inferior. */
4515 if (remote_async_terminal_ours_p)
4517 cleanup_sigint_signal_handler (NULL);
4518 add_file_handler (input_fd, stdin_event_handler, 0);
4519 remote_async_terminal_ours_p = 1;
4523 remote_console_output (char *msg)
4527 for (p = msg; p[0] && p[1]; p += 2)
4530 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
4533 fputs_unfiltered (tb, gdb_stdtarg);
4535 gdb_flush (gdb_stdtarg);
4538 typedef struct cached_reg
4541 gdb_byte data[MAX_REGISTER_SIZE];
4544 DEF_VEC_O(cached_reg_t);
4548 struct stop_reply *next;
4552 struct target_waitstatus ws;
4554 VEC(cached_reg_t) *regcache;
4556 int stopped_by_watchpoint_p;
4557 CORE_ADDR watch_data_address;
4565 /* The list of already fetched and acknowledged stop events. */
4566 static struct stop_reply *stop_reply_queue;
4568 static struct stop_reply *
4569 stop_reply_xmalloc (void)
4571 struct stop_reply *r = XMALLOC (struct stop_reply);
4577 stop_reply_xfree (struct stop_reply *r)
4581 VEC_free (cached_reg_t, r->regcache);
4586 /* Discard all pending stop replies of inferior PID. If PID is -1,
4587 discard everything. */
4590 discard_pending_stop_replies (int pid)
4592 struct stop_reply *prev = NULL, *reply, *next;
4594 /* Discard the in-flight notification. */
4595 if (pending_stop_reply != NULL
4597 || ptid_get_pid (pending_stop_reply->ptid) == pid))
4599 stop_reply_xfree (pending_stop_reply);
4600 pending_stop_reply = NULL;
4603 /* Discard the stop replies we have already pulled with
4605 for (reply = stop_reply_queue; reply; reply = next)
4609 || ptid_get_pid (reply->ptid) == pid)
4611 if (reply == stop_reply_queue)
4612 stop_reply_queue = reply->next;
4614 prev->next = reply->next;
4616 stop_reply_xfree (reply);
4623 /* Cleanup wrapper. */
4626 do_stop_reply_xfree (void *arg)
4628 struct stop_reply *r = arg;
4629 stop_reply_xfree (r);
4632 /* Look for a queued stop reply belonging to PTID. If one is found,
4633 remove it from the queue, and return it. Returns NULL if none is
4634 found. If there are still queued events left to process, tell the
4635 event loop to get back to target_wait soon. */
4637 static struct stop_reply *
4638 queued_stop_reply (ptid_t ptid)
4640 struct stop_reply *it;
4641 struct stop_reply **it_link;
4643 it = stop_reply_queue;
4644 it_link = &stop_reply_queue;
4647 if (ptid_match (it->ptid, ptid))
4649 *it_link = it->next;
4654 it_link = &it->next;
4658 if (stop_reply_queue)
4659 /* There's still at least an event left. */
4660 mark_async_event_handler (remote_async_inferior_event_token);
4665 /* Push a fully parsed stop reply in the stop reply queue. Since we
4666 know that we now have at least one queued event left to pass to the
4667 core side, tell the event loop to get back to target_wait soon. */
4670 push_stop_reply (struct stop_reply *new_event)
4672 struct stop_reply *event;
4674 if (stop_reply_queue)
4676 for (event = stop_reply_queue;
4677 event && event->next;
4678 event = event->next)
4681 event->next = new_event;
4684 stop_reply_queue = new_event;
4686 mark_async_event_handler (remote_async_inferior_event_token);
4689 /* Returns true if we have a stop reply for PTID. */
4692 peek_stop_reply (ptid_t ptid)
4694 struct stop_reply *it;
4696 for (it = stop_reply_queue; it; it = it->next)
4697 if (ptid_equal (ptid, it->ptid))
4699 if (it->ws.kind == TARGET_WAITKIND_STOPPED)
4706 /* Parse the stop reply in BUF. Either the function succeeds, and the
4707 result is stored in EVENT, or throws an error. */
4710 remote_parse_stop_reply (char *buf, struct stop_reply *event)
4712 struct remote_arch_state *rsa = get_remote_arch_state ();
4716 event->ptid = null_ptid;
4717 event->ws.kind = TARGET_WAITKIND_IGNORE;
4718 event->ws.value.integer = 0;
4719 event->solibs_changed = 0;
4720 event->replay_event = 0;
4721 event->stopped_by_watchpoint_p = 0;
4722 event->regcache = NULL;
4727 case 'T': /* Status with PC, SP, FP, ... */
4728 /* Expedited reply, containing Signal, {regno, reg} repeat. */
4729 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
4731 n... = register number
4732 r... = register contents
4735 p = &buf[3]; /* after Txx */
4743 /* If the packet contains a register number, save it in
4744 pnum and set p1 to point to the character following it.
4745 Otherwise p1 points to p. */
4747 /* If this packet is an awatch packet, don't parse the 'a'
4748 as a register number. */
4750 if (strncmp (p, "awatch", strlen("awatch")) != 0
4751 && strncmp (p, "core", strlen ("core") != 0))
4753 /* Read the ``P'' register number. */
4754 pnum = strtol (p, &p_temp, 16);
4760 if (p1 == p) /* No register number present here. */
4762 p1 = strchr (p, ':');
4764 error (_("Malformed packet(a) (missing colon): %s\n\
4767 if (strncmp (p, "thread", p1 - p) == 0)
4768 event->ptid = read_ptid (++p1, &p);
4769 else if ((strncmp (p, "watch", p1 - p) == 0)
4770 || (strncmp (p, "rwatch", p1 - p) == 0)
4771 || (strncmp (p, "awatch", p1 - p) == 0))
4773 event->stopped_by_watchpoint_p = 1;
4774 p = unpack_varlen_hex (++p1, &addr);
4775 event->watch_data_address = (CORE_ADDR) addr;
4777 else if (strncmp (p, "library", p1 - p) == 0)
4781 while (*p_temp && *p_temp != ';')
4784 event->solibs_changed = 1;
4787 else if (strncmp (p, "replaylog", p1 - p) == 0)
4789 /* NO_HISTORY event.
4790 p1 will indicate "begin" or "end", but
4791 it makes no difference for now, so ignore it. */
4792 event->replay_event = 1;
4793 p_temp = strchr (p1 + 1, ';');
4797 else if (strncmp (p, "core", p1 - p) == 0)
4800 p = unpack_varlen_hex (++p1, &c);
4805 /* Silently skip unknown optional info. */
4806 p_temp = strchr (p1 + 1, ';');
4813 struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum);
4814 cached_reg_t cached_reg;
4819 error (_("Malformed packet(b) (missing colon): %s\n\
4825 error (_("Remote sent bad register number %s: %s\n\
4827 phex_nz (pnum, 0), p, buf);
4829 cached_reg.num = reg->regnum;
4831 fieldsize = hex2bin (p, cached_reg.data,
4832 register_size (target_gdbarch,
4835 if (fieldsize < register_size (target_gdbarch,
4837 warning (_("Remote reply is too short: %s"), buf);
4839 VEC_safe_push (cached_reg_t, event->regcache, &cached_reg);
4843 error (_("Remote register badly formatted: %s\nhere: %s"),
4848 case 'S': /* Old style status, just signal only. */
4849 if (event->solibs_changed)
4850 event->ws.kind = TARGET_WAITKIND_LOADED;
4851 else if (event->replay_event)
4852 event->ws.kind = TARGET_WAITKIND_NO_HISTORY;
4855 event->ws.kind = TARGET_WAITKIND_STOPPED;
4856 event->ws.value.sig = (enum target_signal)
4857 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
4860 case 'W': /* Target exited. */
4867 /* GDB used to accept only 2 hex chars here. Stubs should
4868 only send more if they detect GDB supports multi-process
4870 p = unpack_varlen_hex (&buf[1], &value);
4874 /* The remote process exited. */
4875 event->ws.kind = TARGET_WAITKIND_EXITED;
4876 event->ws.value.integer = value;
4880 /* The remote process exited with a signal. */
4881 event->ws.kind = TARGET_WAITKIND_SIGNALLED;
4882 event->ws.value.sig = (enum target_signal) value;
4885 /* If no process is specified, assume inferior_ptid. */
4886 pid = ptid_get_pid (inferior_ptid);
4895 else if (strncmp (p,
4896 "process:", sizeof ("process:") - 1) == 0)
4899 p += sizeof ("process:") - 1;
4900 unpack_varlen_hex (p, &upid);
4904 error (_("unknown stop reply packet: %s"), buf);
4907 error (_("unknown stop reply packet: %s"), buf);
4908 event->ptid = pid_to_ptid (pid);
4913 if (non_stop && ptid_equal (event->ptid, null_ptid))
4914 error (_("No process or thread specified in stop reply: %s"), buf);
4917 /* When the stub wants to tell GDB about a new stop reply, it sends a
4918 stop notification (%Stop). Those can come it at any time, hence,
4919 we have to make sure that any pending putpkt/getpkt sequence we're
4920 making is finished, before querying the stub for more events with
4921 vStopped. E.g., if we started a vStopped sequence immediatelly
4922 upon receiving the %Stop notification, something like this could
4930 1.6) <-- (registers reply to step #1.3)
4932 Obviously, the reply in step #1.6 would be unexpected to a vStopped
4935 To solve this, whenever we parse a %Stop notification sucessfully,
4936 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
4937 doing whatever we were doing:
4943 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
4944 2.5) <-- (registers reply to step #2.3)
4946 Eventualy after step #2.5, we return to the event loop, which
4947 notices there's an event on the
4948 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
4949 associated callback --- the function below. At this point, we're
4950 always safe to start a vStopped sequence. :
4953 2.7) <-- T05 thread:2
4959 remote_get_pending_stop_replies (void)
4961 struct remote_state *rs = get_remote_state ();
4963 if (pending_stop_reply)
4966 putpkt ("vStopped");
4968 /* Now we can rely on it. */
4969 push_stop_reply (pending_stop_reply);
4970 pending_stop_reply = NULL;
4974 getpkt (&rs->buf, &rs->buf_size, 0);
4975 if (strcmp (rs->buf, "OK") == 0)
4979 struct cleanup *old_chain;
4980 struct stop_reply *stop_reply = stop_reply_xmalloc ();
4982 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
4983 remote_parse_stop_reply (rs->buf, stop_reply);
4986 putpkt ("vStopped");
4988 if (stop_reply->ws.kind != TARGET_WAITKIND_IGNORE)
4990 /* Now we can rely on it. */
4991 discard_cleanups (old_chain);
4992 push_stop_reply (stop_reply);
4995 /* We got an unknown stop reply. */
4996 do_cleanups (old_chain);
5003 /* Called when it is decided that STOP_REPLY holds the info of the
5004 event that is to be returned to the core. This function always
5005 destroys STOP_REPLY. */
5008 process_stop_reply (struct stop_reply *stop_reply,
5009 struct target_waitstatus *status)
5012 struct thread_info *info;
5014 *status = stop_reply->ws;
5015 ptid = stop_reply->ptid;
5017 /* If no thread/process was reported by the stub, assume the current
5019 if (ptid_equal (ptid, null_ptid))
5020 ptid = inferior_ptid;
5022 if (status->kind != TARGET_WAITKIND_EXITED
5023 && status->kind != TARGET_WAITKIND_SIGNALLED)
5025 /* Expedited registers. */
5026 if (stop_reply->regcache)
5028 struct regcache *regcache
5029 = get_thread_arch_regcache (ptid, target_gdbarch);
5034 VEC_iterate(cached_reg_t, stop_reply->regcache, ix, reg);
5036 regcache_raw_supply (regcache, reg->num, reg->data);
5037 VEC_free (cached_reg_t, stop_reply->regcache);
5040 remote_stopped_by_watchpoint_p = stop_reply->stopped_by_watchpoint_p;
5041 remote_watch_data_address = stop_reply->watch_data_address;
5043 remote_notice_new_inferior (ptid, 0);
5044 demand_private_info (ptid)->core = stop_reply->core;
5047 stop_reply_xfree (stop_reply);
5051 /* The non-stop mode version of target_wait. */
5054 remote_wait_ns (ptid_t ptid, struct target_waitstatus *status, int options)
5056 struct remote_state *rs = get_remote_state ();
5057 struct stop_reply *stop_reply;
5060 /* If in non-stop mode, get out of getpkt even if a
5061 notification is received. */
5063 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
5070 case 'E': /* Error of some sort. */
5071 /* We're out of sync with the target now. Did it continue
5072 or not? We can't tell which thread it was in non-stop,
5073 so just ignore this. */
5074 warning (_("Remote failure reply: %s"), rs->buf);
5076 case 'O': /* Console output. */
5077 remote_console_output (rs->buf + 1);
5080 warning (_("Invalid remote reply: %s"), rs->buf);
5084 /* Acknowledge a pending stop reply that may have arrived in the
5086 if (pending_stop_reply != NULL)
5087 remote_get_pending_stop_replies ();
5089 /* If indeed we noticed a stop reply, we're done. */
5090 stop_reply = queued_stop_reply (ptid);
5091 if (stop_reply != NULL)
5092 return process_stop_reply (stop_reply, status);
5094 /* Still no event. If we're just polling for an event, then
5095 return to the event loop. */
5096 if (options & TARGET_WNOHANG)
5098 status->kind = TARGET_WAITKIND_IGNORE;
5099 return minus_one_ptid;
5102 /* Otherwise do a blocking wait. */
5103 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
5108 /* Wait until the remote machine stops, then return, storing status in
5109 STATUS just as `wait' would. */
5112 remote_wait_as (ptid_t ptid, struct target_waitstatus *status, int options)
5114 struct remote_state *rs = get_remote_state ();
5115 ptid_t event_ptid = null_ptid;
5117 struct stop_reply *stop_reply;
5121 status->kind = TARGET_WAITKIND_IGNORE;
5122 status->value.integer = 0;
5124 stop_reply = queued_stop_reply (ptid);
5125 if (stop_reply != NULL)
5126 return process_stop_reply (stop_reply, status);
5128 if (rs->cached_wait_status)
5129 /* Use the cached wait status, but only once. */
5130 rs->cached_wait_status = 0;
5135 if (!target_is_async_p ())
5137 ofunc = signal (SIGINT, remote_interrupt);
5138 /* If the user hit C-c before this packet, or between packets,
5139 pretend that it was hit right here. */
5143 remote_interrupt (SIGINT);
5147 /* FIXME: cagney/1999-09-27: If we're in async mode we should
5148 _never_ wait for ever -> test on target_is_async_p().
5149 However, before we do that we need to ensure that the caller
5150 knows how to take the target into/out of async mode. */
5151 ret = getpkt_sane (&rs->buf, &rs->buf_size, wait_forever_enabled_p);
5152 if (!target_is_async_p ())
5153 signal (SIGINT, ofunc);
5158 remote_stopped_by_watchpoint_p = 0;
5160 /* We got something. */
5161 rs->waiting_for_stop_reply = 0;
5163 /* Assume that the target has acknowledged Ctrl-C unless we receive
5164 an 'F' or 'O' packet. */
5165 if (buf[0] != 'F' && buf[0] != 'O')
5166 rs->ctrlc_pending_p = 0;
5170 case 'E': /* Error of some sort. */
5171 /* We're out of sync with the target now. Did it continue or
5172 not? Not is more likely, so report a stop. */
5173 warning (_("Remote failure reply: %s"), buf);
5174 status->kind = TARGET_WAITKIND_STOPPED;
5175 status->value.sig = TARGET_SIGNAL_0;
5177 case 'F': /* File-I/O request. */
5178 remote_fileio_request (buf, rs->ctrlc_pending_p);
5179 rs->ctrlc_pending_p = 0;
5181 case 'T': case 'S': case 'X': case 'W':
5183 struct stop_reply *stop_reply;
5184 struct cleanup *old_chain;
5186 stop_reply = stop_reply_xmalloc ();
5187 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
5188 remote_parse_stop_reply (buf, stop_reply);
5189 discard_cleanups (old_chain);
5190 event_ptid = process_stop_reply (stop_reply, status);
5193 case 'O': /* Console output. */
5194 remote_console_output (buf + 1);
5196 /* The target didn't really stop; keep waiting. */
5197 rs->waiting_for_stop_reply = 1;
5201 if (last_sent_signal != TARGET_SIGNAL_0)
5203 /* Zero length reply means that we tried 'S' or 'C' and the
5204 remote system doesn't support it. */
5205 target_terminal_ours_for_output ();
5207 ("Can't send signals to this remote system. %s not sent.\n",
5208 target_signal_to_name (last_sent_signal));
5209 last_sent_signal = TARGET_SIGNAL_0;
5210 target_terminal_inferior ();
5212 strcpy ((char *) buf, last_sent_step ? "s" : "c");
5213 putpkt ((char *) buf);
5215 /* We just told the target to resume, so a stop reply is in
5217 rs->waiting_for_stop_reply = 1;
5220 /* else fallthrough */
5222 warning (_("Invalid remote reply: %s"), buf);
5224 rs->waiting_for_stop_reply = 1;
5228 if (status->kind == TARGET_WAITKIND_IGNORE)
5230 /* Nothing interesting happened. If we're doing a non-blocking
5231 poll, we're done. Otherwise, go back to waiting. */
5232 if (options & TARGET_WNOHANG)
5233 return minus_one_ptid;
5237 else if (status->kind != TARGET_WAITKIND_EXITED
5238 && status->kind != TARGET_WAITKIND_SIGNALLED)
5240 if (!ptid_equal (event_ptid, null_ptid))
5241 record_currthread (event_ptid);
5243 event_ptid = inferior_ptid;
5246 /* A process exit. Invalidate our notion of current thread. */
5247 record_currthread (minus_one_ptid);
5252 /* Wait until the remote machine stops, then return, storing status in
5253 STATUS just as `wait' would. */
5256 remote_wait (struct target_ops *ops,
5257 ptid_t ptid, struct target_waitstatus *status, int options)
5262 event_ptid = remote_wait_ns (ptid, status, options);
5264 event_ptid = remote_wait_as (ptid, status, options);
5266 if (target_can_async_p ())
5268 /* If there are are events left in the queue tell the event loop
5270 if (stop_reply_queue)
5271 mark_async_event_handler (remote_async_inferior_event_token);
5277 /* Fetch a single register using a 'p' packet. */
5280 fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg)
5282 struct remote_state *rs = get_remote_state ();
5284 char regp[MAX_REGISTER_SIZE];
5287 if (remote_protocol_packets[PACKET_p].support == PACKET_DISABLE)
5290 if (reg->pnum == -1)
5295 p += hexnumstr (p, reg->pnum);
5298 getpkt (&rs->buf, &rs->buf_size, 0);
5302 switch (packet_ok (buf, &remote_protocol_packets[PACKET_p]))
5306 case PACKET_UNKNOWN:
5309 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
5310 gdbarch_register_name (get_regcache_arch (regcache),
5315 /* If this register is unfetchable, tell the regcache. */
5318 regcache_raw_supply (regcache, reg->regnum, NULL);
5322 /* Otherwise, parse and supply the value. */
5328 error (_("fetch_register_using_p: early buf termination"));
5330 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
5333 regcache_raw_supply (regcache, reg->regnum, regp);
5337 /* Fetch the registers included in the target's 'g' packet. */
5340 send_g_packet (void)
5342 struct remote_state *rs = get_remote_state ();
5345 sprintf (rs->buf, "g");
5346 remote_send (&rs->buf, &rs->buf_size);
5348 /* We can get out of synch in various cases. If the first character
5349 in the buffer is not a hex character, assume that has happened
5350 and try to fetch another packet to read. */
5351 while ((rs->buf[0] < '0' || rs->buf[0] > '9')
5352 && (rs->buf[0] < 'A' || rs->buf[0] > 'F')
5353 && (rs->buf[0] < 'a' || rs->buf[0] > 'f')
5354 && rs->buf[0] != 'x') /* New: unavailable register value. */
5357 fprintf_unfiltered (gdb_stdlog,
5358 "Bad register packet; fetching a new packet\n");
5359 getpkt (&rs->buf, &rs->buf_size, 0);
5362 buf_len = strlen (rs->buf);
5364 /* Sanity check the received packet. */
5365 if (buf_len % 2 != 0)
5366 error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf);
5372 process_g_packet (struct regcache *regcache)
5374 struct gdbarch *gdbarch = get_regcache_arch (regcache);
5375 struct remote_state *rs = get_remote_state ();
5376 struct remote_arch_state *rsa = get_remote_arch_state ();
5381 buf_len = strlen (rs->buf);
5383 /* Further sanity checks, with knowledge of the architecture. */
5384 if (buf_len > 2 * rsa->sizeof_g_packet)
5385 error (_("Remote 'g' packet reply is too long: %s"), rs->buf);
5387 /* Save the size of the packet sent to us by the target. It is used
5388 as a heuristic when determining the max size of packets that the
5389 target can safely receive. */
5390 if (rsa->actual_register_packet_size == 0)
5391 rsa->actual_register_packet_size = buf_len;
5393 /* If this is smaller than we guessed the 'g' packet would be,
5394 update our records. A 'g' reply that doesn't include a register's
5395 value implies either that the register is not available, or that
5396 the 'p' packet must be used. */
5397 if (buf_len < 2 * rsa->sizeof_g_packet)
5399 rsa->sizeof_g_packet = buf_len / 2;
5401 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
5403 if (rsa->regs[i].pnum == -1)
5406 if (rsa->regs[i].offset >= rsa->sizeof_g_packet)
5407 rsa->regs[i].in_g_packet = 0;
5409 rsa->regs[i].in_g_packet = 1;
5413 regs = alloca (rsa->sizeof_g_packet);
5415 /* Unimplemented registers read as all bits zero. */
5416 memset (regs, 0, rsa->sizeof_g_packet);
5418 /* Reply describes registers byte by byte, each byte encoded as two
5419 hex characters. Suck them all up, then supply them to the
5420 register cacheing/storage mechanism. */
5423 for (i = 0; i < rsa->sizeof_g_packet; i++)
5425 if (p[0] == 0 || p[1] == 0)
5426 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
5427 internal_error (__FILE__, __LINE__,
5428 "unexpected end of 'g' packet reply");
5430 if (p[0] == 'x' && p[1] == 'x')
5431 regs[i] = 0; /* 'x' */
5433 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
5439 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
5441 struct packet_reg *r = &rsa->regs[i];
5444 if (r->offset * 2 >= strlen (rs->buf))
5445 /* This shouldn't happen - we adjusted in_g_packet above. */
5446 internal_error (__FILE__, __LINE__,
5447 "unexpected end of 'g' packet reply");
5448 else if (rs->buf[r->offset * 2] == 'x')
5450 gdb_assert (r->offset * 2 < strlen (rs->buf));
5451 /* The register isn't available, mark it as such (at
5452 the same time setting the value to zero). */
5453 regcache_raw_supply (regcache, r->regnum, NULL);
5456 regcache_raw_supply (regcache, r->regnum,
5464 fetch_registers_using_g (struct regcache *regcache)
5467 process_g_packet (regcache);
5471 remote_fetch_registers (struct target_ops *ops,
5472 struct regcache *regcache, int regnum)
5474 struct remote_arch_state *rsa = get_remote_arch_state ();
5477 set_general_thread (inferior_ptid);
5481 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
5482 gdb_assert (reg != NULL);
5484 /* If this register might be in the 'g' packet, try that first -
5485 we are likely to read more than one register. If this is the
5486 first 'g' packet, we might be overly optimistic about its
5487 contents, so fall back to 'p'. */
5488 if (reg->in_g_packet)
5490 fetch_registers_using_g (regcache);
5491 if (reg->in_g_packet)
5495 if (fetch_register_using_p (regcache, reg))
5498 /* This register is not available. */
5499 regcache_raw_supply (regcache, reg->regnum, NULL);
5504 fetch_registers_using_g (regcache);
5506 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
5507 if (!rsa->regs[i].in_g_packet)
5508 if (!fetch_register_using_p (regcache, &rsa->regs[i]))
5510 /* This register is not available. */
5511 regcache_raw_supply (regcache, i, NULL);
5515 /* Prepare to store registers. Since we may send them all (using a
5516 'G' request), we have to read out the ones we don't want to change
5520 remote_prepare_to_store (struct regcache *regcache)
5522 struct remote_arch_state *rsa = get_remote_arch_state ();
5524 gdb_byte buf[MAX_REGISTER_SIZE];
5526 /* Make sure the entire registers array is valid. */
5527 switch (remote_protocol_packets[PACKET_P].support)
5529 case PACKET_DISABLE:
5530 case PACKET_SUPPORT_UNKNOWN:
5531 /* Make sure all the necessary registers are cached. */
5532 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
5533 if (rsa->regs[i].in_g_packet)
5534 regcache_raw_read (regcache, rsa->regs[i].regnum, buf);
5541 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
5542 packet was not recognized. */
5545 store_register_using_P (const struct regcache *regcache,
5546 struct packet_reg *reg)
5548 struct gdbarch *gdbarch = get_regcache_arch (regcache);
5549 struct remote_state *rs = get_remote_state ();
5550 /* Try storing a single register. */
5551 char *buf = rs->buf;
5552 gdb_byte regp[MAX_REGISTER_SIZE];
5555 if (remote_protocol_packets[PACKET_P].support == PACKET_DISABLE)
5558 if (reg->pnum == -1)
5561 xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0));
5562 p = buf + strlen (buf);
5563 regcache_raw_collect (regcache, reg->regnum, regp);
5564 bin2hex (regp, p, register_size (gdbarch, reg->regnum));
5566 getpkt (&rs->buf, &rs->buf_size, 0);
5568 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P]))
5573 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
5574 gdbarch_register_name (gdbarch, reg->regnum), rs->buf);
5575 case PACKET_UNKNOWN:
5578 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
5582 /* Store register REGNUM, or all registers if REGNUM == -1, from the
5583 contents of the register cache buffer. FIXME: ignores errors. */
5586 store_registers_using_G (const struct regcache *regcache)
5588 struct remote_state *rs = get_remote_state ();
5589 struct remote_arch_state *rsa = get_remote_arch_state ();
5593 /* Extract all the registers in the regcache copying them into a
5597 regs = alloca (rsa->sizeof_g_packet);
5598 memset (regs, 0, rsa->sizeof_g_packet);
5599 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
5601 struct packet_reg *r = &rsa->regs[i];
5603 regcache_raw_collect (regcache, r->regnum, regs + r->offset);
5607 /* Command describes registers byte by byte,
5608 each byte encoded as two hex characters. */
5611 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
5613 bin2hex (regs, p, rsa->sizeof_g_packet);
5615 getpkt (&rs->buf, &rs->buf_size, 0);
5616 if (packet_check_result (rs->buf) == PACKET_ERROR)
5617 error (_("Could not write registers; remote failure reply '%s'"),
5621 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
5622 of the register cache buffer. FIXME: ignores errors. */
5625 remote_store_registers (struct target_ops *ops,
5626 struct regcache *regcache, int regnum)
5628 struct remote_arch_state *rsa = get_remote_arch_state ();
5631 set_general_thread (inferior_ptid);
5635 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
5636 gdb_assert (reg != NULL);
5638 /* Always prefer to store registers using the 'P' packet if
5639 possible; we often change only a small number of registers.
5640 Sometimes we change a larger number; we'd need help from a
5641 higher layer to know to use 'G'. */
5642 if (store_register_using_P (regcache, reg))
5645 /* For now, don't complain if we have no way to write the
5646 register. GDB loses track of unavailable registers too
5647 easily. Some day, this may be an error. We don't have
5648 any way to read the register, either... */
5649 if (!reg->in_g_packet)
5652 store_registers_using_G (regcache);
5656 store_registers_using_G (regcache);
5658 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
5659 if (!rsa->regs[i].in_g_packet)
5660 if (!store_register_using_P (regcache, &rsa->regs[i]))
5661 /* See above for why we do not issue an error here. */
5666 /* Return the number of hex digits in num. */
5669 hexnumlen (ULONGEST num)
5673 for (i = 0; num != 0; i++)
5679 /* Set BUF to the minimum number of hex digits representing NUM. */
5682 hexnumstr (char *buf, ULONGEST num)
5684 int len = hexnumlen (num);
5685 return hexnumnstr (buf, num, len);
5689 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
5692 hexnumnstr (char *buf, ULONGEST num, int width)
5698 for (i = width - 1; i >= 0; i--)
5700 buf[i] = "0123456789abcdef"[(num & 0xf)];
5707 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
5710 remote_address_masked (CORE_ADDR addr)
5712 int address_size = remote_address_size;
5713 /* If "remoteaddresssize" was not set, default to target address size. */
5715 address_size = gdbarch_addr_bit (target_gdbarch);
5717 if (address_size > 0
5718 && address_size < (sizeof (ULONGEST) * 8))
5720 /* Only create a mask when that mask can safely be constructed
5721 in a ULONGEST variable. */
5723 mask = (mask << address_size) - 1;
5729 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
5730 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
5731 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
5732 (which may be more than *OUT_LEN due to escape characters). The
5733 total number of bytes in the output buffer will be at most
5737 remote_escape_output (const gdb_byte *buffer, int len,
5738 gdb_byte *out_buf, int *out_len,
5741 int input_index, output_index;
5744 for (input_index = 0; input_index < len; input_index++)
5746 gdb_byte b = buffer[input_index];
5748 if (b == '$' || b == '#' || b == '}')
5750 /* These must be escaped. */
5751 if (output_index + 2 > out_maxlen)
5753 out_buf[output_index++] = '}';
5754 out_buf[output_index++] = b ^ 0x20;
5758 if (output_index + 1 > out_maxlen)
5760 out_buf[output_index++] = b;
5764 *out_len = input_index;
5765 return output_index;
5768 /* Convert BUFFER, escaped data LEN bytes long, into binary data
5769 in OUT_BUF. Return the number of bytes written to OUT_BUF.
5770 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
5772 This function reverses remote_escape_output. It allows more
5773 escaped characters than that function does, in particular because
5774 '*' must be escaped to avoid the run-length encoding processing
5775 in reading packets. */
5778 remote_unescape_input (const gdb_byte *buffer, int len,
5779 gdb_byte *out_buf, int out_maxlen)
5781 int input_index, output_index;
5786 for (input_index = 0; input_index < len; input_index++)
5788 gdb_byte b = buffer[input_index];
5790 if (output_index + 1 > out_maxlen)
5792 warning (_("Received too much data from remote target;"
5793 " ignoring overflow."));
5794 return output_index;
5799 out_buf[output_index++] = b ^ 0x20;
5805 out_buf[output_index++] = b;
5809 error (_("Unmatched escape character in target response."));
5811 return output_index;
5814 /* Determine whether the remote target supports binary downloading.
5815 This is accomplished by sending a no-op memory write of zero length
5816 to the target at the specified address. It does not suffice to send
5817 the whole packet, since many stubs strip the eighth bit and
5818 subsequently compute a wrong checksum, which causes real havoc with
5821 NOTE: This can still lose if the serial line is not eight-bit
5822 clean. In cases like this, the user should clear "remote
5826 check_binary_download (CORE_ADDR addr)
5828 struct remote_state *rs = get_remote_state ();
5830 switch (remote_protocol_packets[PACKET_X].support)
5832 case PACKET_DISABLE:
5836 case PACKET_SUPPORT_UNKNOWN:
5842 p += hexnumstr (p, (ULONGEST) addr);
5844 p += hexnumstr (p, (ULONGEST) 0);
5848 putpkt_binary (rs->buf, (int) (p - rs->buf));
5849 getpkt (&rs->buf, &rs->buf_size, 0);
5851 if (rs->buf[0] == '\0')
5854 fprintf_unfiltered (gdb_stdlog,
5855 "binary downloading NOT suppported by target\n");
5856 remote_protocol_packets[PACKET_X].support = PACKET_DISABLE;
5861 fprintf_unfiltered (gdb_stdlog,
5862 "binary downloading suppported by target\n");
5863 remote_protocol_packets[PACKET_X].support = PACKET_ENABLE;
5870 /* Write memory data directly to the remote machine.
5871 This does not inform the data cache; the data cache uses this.
5872 HEADER is the starting part of the packet.
5873 MEMADDR is the address in the remote memory space.
5874 MYADDR is the address of the buffer in our space.
5875 LEN is the number of bytes.
5876 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
5877 should send data as binary ('X'), or hex-encoded ('M').
5879 The function creates packet of the form
5880 <HEADER><ADDRESS>,<LENGTH>:<DATA>
5882 where encoding of <DATA> is termined by PACKET_FORMAT.
5884 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
5887 Returns the number of bytes transferred, or 0 (setting errno) for
5888 error. Only transfer a single packet. */
5891 remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
5892 const gdb_byte *myaddr, int len,
5893 char packet_format, int use_length)
5895 struct remote_state *rs = get_remote_state ();
5905 if (packet_format != 'X' && packet_format != 'M')
5906 internal_error (__FILE__, __LINE__,
5907 "remote_write_bytes_aux: bad packet format");
5912 payload_size = get_memory_write_packet_size ();
5914 /* The packet buffer will be large enough for the payload;
5915 get_memory_packet_size ensures this. */
5918 /* Compute the size of the actual payload by subtracting out the
5919 packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
5921 payload_size -= strlen ("$,:#NN");
5923 /* The comma won't be used. */
5925 header_length = strlen (header);
5926 payload_size -= header_length;
5927 payload_size -= hexnumlen (memaddr);
5929 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
5931 strcat (rs->buf, header);
5932 p = rs->buf + strlen (header);
5934 /* Compute a best guess of the number of bytes actually transfered. */
5935 if (packet_format == 'X')
5937 /* Best guess at number of bytes that will fit. */
5938 todo = min (len, payload_size);
5940 payload_size -= hexnumlen (todo);
5941 todo = min (todo, payload_size);
5945 /* Num bytes that will fit. */
5946 todo = min (len, payload_size / 2);
5948 payload_size -= hexnumlen (todo);
5949 todo = min (todo, payload_size / 2);
5953 internal_error (__FILE__, __LINE__,
5954 _("minumum packet size too small to write data"));
5956 /* If we already need another packet, then try to align the end
5957 of this packet to a useful boundary. */
5958 if (todo > 2 * REMOTE_ALIGN_WRITES && todo < len)
5959 todo = ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr;
5961 /* Append "<memaddr>". */
5962 memaddr = remote_address_masked (memaddr);
5963 p += hexnumstr (p, (ULONGEST) memaddr);
5970 /* Append <len>. Retain the location/size of <len>. It may need to
5971 be adjusted once the packet body has been created. */
5973 plenlen = hexnumstr (p, (ULONGEST) todo);
5981 /* Append the packet body. */
5982 if (packet_format == 'X')
5984 /* Binary mode. Send target system values byte by byte, in
5985 increasing byte addresses. Only escape certain critical
5987 payload_length = remote_escape_output (myaddr, todo, p, &nr_bytes,
5990 /* If not all TODO bytes fit, then we'll need another packet. Make
5991 a second try to keep the end of the packet aligned. Don't do
5992 this if the packet is tiny. */
5993 if (nr_bytes < todo && nr_bytes > 2 * REMOTE_ALIGN_WRITES)
5997 new_nr_bytes = (((memaddr + nr_bytes) & ~(REMOTE_ALIGN_WRITES - 1))
5999 if (new_nr_bytes != nr_bytes)
6000 payload_length = remote_escape_output (myaddr, new_nr_bytes,
6005 p += payload_length;
6006 if (use_length && nr_bytes < todo)
6008 /* Escape chars have filled up the buffer prematurely,
6009 and we have actually sent fewer bytes than planned.
6010 Fix-up the length field of the packet. Use the same
6011 number of characters as before. */
6012 plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen);
6013 *plen = ':'; /* overwrite \0 from hexnumnstr() */
6018 /* Normal mode: Send target system values byte by byte, in
6019 increasing byte addresses. Each byte is encoded as a two hex
6021 nr_bytes = bin2hex (myaddr, p, todo);
6025 putpkt_binary (rs->buf, (int) (p - rs->buf));
6026 getpkt (&rs->buf, &rs->buf_size, 0);
6028 if (rs->buf[0] == 'E')
6030 /* There is no correspondance between what the remote protocol
6031 uses for errors and errno codes. We would like a cleaner way
6032 of representing errors (big enough to include errno codes,
6033 bfd_error codes, and others). But for now just return EIO. */
6038 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
6039 fewer bytes than we'd planned. */
6043 /* Write memory data directly to the remote machine.
6044 This does not inform the data cache; the data cache uses this.
6045 MEMADDR is the address in the remote memory space.
6046 MYADDR is the address of the buffer in our space.
6047 LEN is the number of bytes.
6049 Returns number of bytes transferred, or 0 (setting errno) for
6050 error. Only transfer a single packet. */
6053 remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
6055 char *packet_format = 0;
6057 /* Check whether the target supports binary download. */
6058 check_binary_download (memaddr);
6060 switch (remote_protocol_packets[PACKET_X].support)
6063 packet_format = "X";
6065 case PACKET_DISABLE:
6066 packet_format = "M";
6068 case PACKET_SUPPORT_UNKNOWN:
6069 internal_error (__FILE__, __LINE__,
6070 _("remote_write_bytes: bad internal state"));
6072 internal_error (__FILE__, __LINE__, _("bad switch"));
6075 return remote_write_bytes_aux (packet_format,
6076 memaddr, myaddr, len, packet_format[0], 1);
6079 /* Read memory data directly from the remote machine.
6080 This does not use the data cache; the data cache uses this.
6081 MEMADDR is the address in the remote memory space.
6082 MYADDR is the address of the buffer in our space.
6083 LEN is the number of bytes.
6085 Returns number of bytes transferred, or 0 for error. */
6087 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
6088 remote targets) shouldn't attempt to read the entire buffer.
6089 Instead it should read a single packet worth of data and then
6090 return the byte size of that packet to the caller. The caller (its
6091 caller and its callers caller ;-) already contains code for
6092 handling partial reads. */
6095 remote_read_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
6097 struct remote_state *rs = get_remote_state ();
6098 int max_buf_size; /* Max size of packet output buffer. */
6104 max_buf_size = get_memory_read_packet_size ();
6105 /* The packet buffer will be large enough for the payload;
6106 get_memory_packet_size ensures this. */
6115 todo = min (len, max_buf_size / 2); /* num bytes that will fit */
6117 /* construct "m"<memaddr>","<len>" */
6118 /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */
6119 memaddr = remote_address_masked (memaddr);
6122 p += hexnumstr (p, (ULONGEST) memaddr);
6124 p += hexnumstr (p, (ULONGEST) todo);
6128 getpkt (&rs->buf, &rs->buf_size, 0);
6130 if (rs->buf[0] == 'E'
6131 && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2])
6132 && rs->buf[3] == '\0')
6134 /* There is no correspondance between what the remote
6135 protocol uses for errors and errno codes. We would like
6136 a cleaner way of representing errors (big enough to
6137 include errno codes, bfd_error codes, and others). But
6138 for now just return EIO. */
6143 /* Reply describes memory byte by byte,
6144 each byte encoded as two hex characters. */
6147 if ((i = hex2bin (p, myaddr, todo)) < todo)
6149 /* Reply is short. This means that we were able to read
6150 only part of what we wanted to. */
6151 return i + (origlen - len);
6161 /* Remote notification handler. */
6164 handle_notification (char *buf, size_t length)
6166 if (strncmp (buf, "Stop:", 5) == 0)
6168 if (pending_stop_reply)
6170 /* We've already parsed the in-flight stop-reply, but the
6171 stub for some reason thought we didn't, possibly due to
6172 timeout on its side. Just ignore it. */
6174 fprintf_unfiltered (gdb_stdlog, "ignoring resent notification\n");
6178 struct cleanup *old_chain;
6179 struct stop_reply *reply = stop_reply_xmalloc ();
6180 old_chain = make_cleanup (do_stop_reply_xfree, reply);
6182 remote_parse_stop_reply (buf + 5, reply);
6184 discard_cleanups (old_chain);
6186 /* Be careful to only set it after parsing, since an error
6187 may be thrown then. */
6188 pending_stop_reply = reply;
6190 /* Notify the event loop there's a stop reply to acknowledge
6191 and that there may be more events to fetch. */
6192 mark_async_event_handler (remote_async_get_pending_events_token);
6195 fprintf_unfiltered (gdb_stdlog, "stop notification captured\n");
6199 /* We ignore notifications we don't recognize, for compatibility
6200 with newer stubs. */
6205 /* Read or write LEN bytes from inferior memory at MEMADDR,
6206 transferring to or from debugger address BUFFER. Write to inferior
6207 if SHOULD_WRITE is nonzero. Returns length of data written or
6208 read; 0 for error. TARGET is unused. */
6211 remote_xfer_memory (CORE_ADDR mem_addr, gdb_byte *buffer, int mem_len,
6212 int should_write, struct mem_attrib *attrib,
6213 struct target_ops *target)
6217 set_general_thread (inferior_ptid);
6220 res = remote_write_bytes (mem_addr, buffer, mem_len);
6222 res = remote_read_bytes (mem_addr, buffer, mem_len);
6227 /* Sends a packet with content determined by the printf format string
6228 FORMAT and the remaining arguments, then gets the reply. Returns
6229 whether the packet was a success, a failure, or unknown. */
6231 static enum packet_result
6232 remote_send_printf (const char *format, ...)
6234 struct remote_state *rs = get_remote_state ();
6235 int max_size = get_remote_packet_size ();
6238 va_start (ap, format);
6241 if (vsnprintf (rs->buf, max_size, format, ap) >= max_size)
6242 internal_error (__FILE__, __LINE__, "Too long remote packet.");
6244 if (putpkt (rs->buf) < 0)
6245 error (_("Communication problem with target."));
6248 getpkt (&rs->buf, &rs->buf_size, 0);
6250 return packet_check_result (rs->buf);
6254 restore_remote_timeout (void *p)
6256 int value = *(int *)p;
6257 remote_timeout = value;
6260 /* Flash writing can take quite some time. We'll set
6261 effectively infinite timeout for flash operations.
6262 In future, we'll need to decide on a better approach. */
6263 static const int remote_flash_timeout = 1000;
6266 remote_flash_erase (struct target_ops *ops,
6267 ULONGEST address, LONGEST length)
6269 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
6270 int saved_remote_timeout = remote_timeout;
6271 enum packet_result ret;
6273 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
6274 &saved_remote_timeout);
6275 remote_timeout = remote_flash_timeout;
6277 ret = remote_send_printf ("vFlashErase:%s,%s",
6278 phex (address, addr_size),
6282 case PACKET_UNKNOWN:
6283 error (_("Remote target does not support flash erase"));
6285 error (_("Error erasing flash with vFlashErase packet"));
6290 do_cleanups (back_to);
6294 remote_flash_write (struct target_ops *ops,
6295 ULONGEST address, LONGEST length,
6296 const gdb_byte *data)
6298 int saved_remote_timeout = remote_timeout;
6300 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
6301 &saved_remote_timeout);
6303 remote_timeout = remote_flash_timeout;
6304 ret = remote_write_bytes_aux ("vFlashWrite:", address, data, length, 'X', 0);
6305 do_cleanups (back_to);
6311 remote_flash_done (struct target_ops *ops)
6313 int saved_remote_timeout = remote_timeout;
6315 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
6316 &saved_remote_timeout);
6318 remote_timeout = remote_flash_timeout;
6319 ret = remote_send_printf ("vFlashDone");
6320 do_cleanups (back_to);
6324 case PACKET_UNKNOWN:
6325 error (_("Remote target does not support vFlashDone"));
6327 error (_("Error finishing flash operation"));
6334 remote_files_info (struct target_ops *ignore)
6336 puts_filtered ("Debugging a target over a serial line.\n");
6339 /* Stuff for dealing with the packets which are part of this protocol.
6340 See comment at top of file for details. */
6342 /* Read a single character from the remote end. */
6345 readchar (int timeout)
6349 ch = serial_readchar (remote_desc, timeout);
6354 switch ((enum serial_rc) ch)
6358 error (_("Remote connection closed"));
6361 perror_with_name (_("Remote communication error"));
6363 case SERIAL_TIMEOUT:
6369 /* Send the command in *BUF to the remote machine, and read the reply
6370 into *BUF. Report an error if we get an error reply. Resize
6371 *BUF using xrealloc if necessary to hold the result, and update
6375 remote_send (char **buf,
6379 getpkt (buf, sizeof_buf, 0);
6381 if ((*buf)[0] == 'E')
6382 error (_("Remote failure reply: %s"), *buf);
6385 /* Return a pointer to an xmalloc'ed string representing an escaped
6386 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
6387 etc. The caller is responsible for releasing the returned
6391 escape_buffer (const char *buf, int n)
6393 struct cleanup *old_chain;
6394 struct ui_file *stb;
6397 stb = mem_fileopen ();
6398 old_chain = make_cleanup_ui_file_delete (stb);
6400 fputstrn_unfiltered (buf, n, 0, stb);
6401 str = ui_file_xstrdup (stb, NULL);
6402 do_cleanups (old_chain);
6406 /* Display a null-terminated packet on stdout, for debugging, using C
6410 print_packet (char *buf)
6412 puts_filtered ("\"");
6413 fputstr_filtered (buf, '"', gdb_stdout);
6414 puts_filtered ("\"");
6420 return putpkt_binary (buf, strlen (buf));
6423 /* Send a packet to the remote machine, with error checking. The data
6424 of the packet is in BUF. The string in BUF can be at most
6425 get_remote_packet_size () - 5 to account for the $, # and checksum,
6426 and for a possible /0 if we are debugging (remote_debug) and want
6427 to print the sent packet as a string. */
6430 putpkt_binary (char *buf, int cnt)
6432 struct remote_state *rs = get_remote_state ();
6434 unsigned char csum = 0;
6435 char *buf2 = alloca (cnt + 6);
6441 /* Catch cases like trying to read memory or listing threads while
6442 we're waiting for a stop reply. The remote server wouldn't be
6443 ready to handle this request, so we'd hang and timeout. We don't
6444 have to worry about this in synchronous mode, because in that
6445 case it's not possible to issue a command while the target is
6446 running. This is not a problem in non-stop mode, because in that
6447 case, the stub is always ready to process serial input. */
6448 if (!non_stop && target_can_async_p () && rs->waiting_for_stop_reply)
6449 error (_("Cannot execute this command while the target is running."));
6451 /* We're sending out a new packet. Make sure we don't look at a
6452 stale cached response. */
6453 rs->cached_wait_status = 0;
6455 /* Copy the packet into buffer BUF2, encapsulating it
6456 and giving it a checksum. */
6461 for (i = 0; i < cnt; i++)
6467 *p++ = tohex ((csum >> 4) & 0xf);
6468 *p++ = tohex (csum & 0xf);
6470 /* Send it over and over until we get a positive ack. */
6474 int started_error_output = 0;
6478 struct cleanup *old_chain;
6482 str = escape_buffer (buf2, p - buf2);
6483 old_chain = make_cleanup (xfree, str);
6484 fprintf_unfiltered (gdb_stdlog, "Sending packet: %s...", str);
6485 gdb_flush (gdb_stdlog);
6486 do_cleanups (old_chain);
6488 if (serial_write (remote_desc, buf2, p - buf2))
6489 perror_with_name (_("putpkt: write failed"));
6491 /* If this is a no acks version of the remote protocol, send the
6492 packet and move on. */
6496 /* Read until either a timeout occurs (-2) or '+' is read.
6497 Handle any notification that arrives in the mean time. */
6500 ch = readchar (remote_timeout);
6508 case SERIAL_TIMEOUT:
6511 if (started_error_output)
6513 putchar_unfiltered ('\n');
6514 started_error_output = 0;
6523 fprintf_unfiltered (gdb_stdlog, "Ack\n");
6527 fprintf_unfiltered (gdb_stdlog, "Nak\n");
6528 case SERIAL_TIMEOUT:
6532 break; /* Retransmit buffer. */
6536 fprintf_unfiltered (gdb_stdlog,
6537 "Packet instead of Ack, ignoring it\n");
6538 /* It's probably an old response sent because an ACK
6539 was lost. Gobble up the packet and ack it so it
6540 doesn't get retransmitted when we resend this
6543 serial_write (remote_desc, "+", 1);
6544 continue; /* Now, go look for +. */
6551 /* If we got a notification, handle it, and go back to looking
6553 /* We've found the start of a notification. Now
6554 collect the data. */
6555 val = read_frame (&rs->buf, &rs->buf_size);
6560 struct cleanup *old_chain;
6563 str = escape_buffer (rs->buf, val);
6564 old_chain = make_cleanup (xfree, str);
6565 fprintf_unfiltered (gdb_stdlog,
6566 " Notification received: %s\n",
6568 do_cleanups (old_chain);
6570 handle_notification (rs->buf, val);
6571 /* We're in sync now, rewait for the ack. */
6578 if (!started_error_output)
6580 started_error_output = 1;
6581 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
6583 fputc_unfiltered (ch & 0177, gdb_stdlog);
6584 fprintf_unfiltered (gdb_stdlog, "%s", rs->buf);
6593 if (!started_error_output)
6595 started_error_output = 1;
6596 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
6598 fputc_unfiltered (ch & 0177, gdb_stdlog);
6602 break; /* Here to retransmit. */
6606 /* This is wrong. If doing a long backtrace, the user should be
6607 able to get out next time we call QUIT, without anything as
6608 violent as interrupt_query. If we want to provide a way out of
6609 here without getting to the next QUIT, it should be based on
6610 hitting ^C twice as in remote_wait. */
6621 /* Come here after finding the start of a frame when we expected an
6622 ack. Do our best to discard the rest of this packet. */
6631 c = readchar (remote_timeout);
6634 case SERIAL_TIMEOUT:
6635 /* Nothing we can do. */
6638 /* Discard the two bytes of checksum and stop. */
6639 c = readchar (remote_timeout);
6641 c = readchar (remote_timeout);
6644 case '*': /* Run length encoding. */
6645 /* Discard the repeat count. */
6646 c = readchar (remote_timeout);
6651 /* A regular character. */
6657 /* Come here after finding the start of the frame. Collect the rest
6658 into *BUF, verifying the checksum, length, and handling run-length
6659 compression. NUL terminate the buffer. If there is not enough room,
6660 expand *BUF using xrealloc.
6662 Returns -1 on error, number of characters in buffer (ignoring the
6663 trailing NULL) on success. (could be extended to return one of the
6664 SERIAL status indications). */
6667 read_frame (char **buf_p,
6674 struct remote_state *rs = get_remote_state ();
6681 c = readchar (remote_timeout);
6684 case SERIAL_TIMEOUT:
6686 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
6690 fputs_filtered ("Saw new packet start in middle of old one\n",
6692 return -1; /* Start a new packet, count retries. */
6695 unsigned char pktcsum;
6701 check_0 = readchar (remote_timeout);
6703 check_1 = readchar (remote_timeout);
6705 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
6708 fputs_filtered ("Timeout in checksum, retrying\n",
6712 else if (check_0 < 0 || check_1 < 0)
6715 fputs_filtered ("Communication error in checksum\n",
6720 /* Don't recompute the checksum; with no ack packets we
6721 don't have any way to indicate a packet retransmission
6726 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
6727 if (csum == pktcsum)
6732 struct cleanup *old_chain;
6735 str = escape_buffer (buf, bc);
6736 old_chain = make_cleanup (xfree, str);
6737 fprintf_unfiltered (gdb_stdlog,
6739 Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n",
6740 pktcsum, csum, str);
6741 do_cleanups (old_chain);
6743 /* Number of characters in buffer ignoring trailing
6747 case '*': /* Run length encoding. */
6752 c = readchar (remote_timeout);
6754 repeat = c - ' ' + 3; /* Compute repeat count. */
6756 /* The character before ``*'' is repeated. */
6758 if (repeat > 0 && repeat <= 255 && bc > 0)
6760 if (bc + repeat - 1 >= *sizeof_buf - 1)
6762 /* Make some more room in the buffer. */
6763 *sizeof_buf += repeat;
6764 *buf_p = xrealloc (*buf_p, *sizeof_buf);
6768 memset (&buf[bc], buf[bc - 1], repeat);
6774 printf_filtered (_("Invalid run length encoding: %s\n"), buf);
6778 if (bc >= *sizeof_buf - 1)
6780 /* Make some more room in the buffer. */
6782 *buf_p = xrealloc (*buf_p, *sizeof_buf);
6793 /* Read a packet from the remote machine, with error checking, and
6794 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6795 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6796 rather than timing out; this is used (in synchronous mode) to wait
6797 for a target that is is executing user code to stop. */
6798 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
6799 don't have to change all the calls to getpkt to deal with the
6800 return value, because at the moment I don't know what the right
6801 thing to do it for those. */
6809 timed_out = getpkt_sane (buf, sizeof_buf, forever);
6813 /* Read a packet from the remote machine, with error checking, and
6814 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6815 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6816 rather than timing out; this is used (in synchronous mode) to wait
6817 for a target that is is executing user code to stop. If FOREVER ==
6818 0, this function is allowed to time out gracefully and return an
6819 indication of this to the caller. Otherwise return the number of
6820 bytes read. If EXPECTING_NOTIF, consider receiving a notification
6821 enough reason to return to the caller. */
6824 getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf, int forever,
6825 int expecting_notif)
6827 struct remote_state *rs = get_remote_state ();
6833 /* We're reading a new response. Make sure we don't look at a
6834 previously cached response. */
6835 rs->cached_wait_status = 0;
6837 strcpy (*buf, "timeout");
6840 timeout = watchdog > 0 ? watchdog : -1;
6841 else if (expecting_notif)
6842 timeout = 0; /* There should already be a char in the buffer. If
6845 timeout = remote_timeout;
6849 /* Process any number of notifications, and then return when
6853 /* If we get a timeout or bad checksm, retry up to MAX_TRIES
6855 for (tries = 1; tries <= MAX_TRIES; tries++)
6857 /* This can loop forever if the remote side sends us
6858 characters continuously, but if it pauses, we'll get
6859 SERIAL_TIMEOUT from readchar because of timeout. Then
6860 we'll count that as a retry.
6862 Note that even when forever is set, we will only wait
6863 forever prior to the start of a packet. After that, we
6864 expect characters to arrive at a brisk pace. They should
6865 show up within remote_timeout intervals. */
6867 c = readchar (timeout);
6868 while (c != SERIAL_TIMEOUT && c != '$' && c != '%');
6870 if (c == SERIAL_TIMEOUT)
6872 if (expecting_notif)
6873 return -1; /* Don't complain, it's normal to not get
6874 anything in this case. */
6876 if (forever) /* Watchdog went off? Kill the target. */
6880 error (_("Watchdog timeout has expired. Target detached."));
6883 fputs_filtered ("Timed out.\n", gdb_stdlog);
6887 /* We've found the start of a packet or notification.
6888 Now collect the data. */
6889 val = read_frame (buf, sizeof_buf);
6894 serial_write (remote_desc, "-", 1);
6897 if (tries > MAX_TRIES)
6899 /* We have tried hard enough, and just can't receive the
6900 packet/notification. Give up. */
6901 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
6903 /* Skip the ack char if we're in no-ack mode. */
6904 if (!rs->noack_mode)
6905 serial_write (remote_desc, "+", 1);
6909 /* If we got an ordinary packet, return that to our caller. */
6914 struct cleanup *old_chain;
6917 str = escape_buffer (*buf, val);
6918 old_chain = make_cleanup (xfree, str);
6919 fprintf_unfiltered (gdb_stdlog, "Packet received: %s\n", str);
6920 do_cleanups (old_chain);
6923 /* Skip the ack char if we're in no-ack mode. */
6924 if (!rs->noack_mode)
6925 serial_write (remote_desc, "+", 1);
6929 /* If we got a notification, handle it, and go back to looking
6933 gdb_assert (c == '%');
6937 struct cleanup *old_chain;
6940 str = escape_buffer (*buf, val);
6941 old_chain = make_cleanup (xfree, str);
6942 fprintf_unfiltered (gdb_stdlog,
6943 " Notification received: %s\n",
6945 do_cleanups (old_chain);
6948 handle_notification (*buf, val);
6950 /* Notifications require no acknowledgement. */
6952 if (expecting_notif)
6959 getpkt_sane (char **buf, long *sizeof_buf, int forever)
6961 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 0);
6965 getpkt_or_notif_sane (char **buf, long *sizeof_buf, int forever)
6967 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 1);
6972 remote_kill (struct target_ops *ops)
6974 /* Use catch_errors so the user can quit from gdb even when we
6975 aren't on speaking terms with the remote system. */
6976 catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
6978 /* Don't wait for it to die. I'm not really sure it matters whether
6979 we do or not. For the existing stubs, kill is a noop. */
6980 target_mourn_inferior ();
6984 remote_vkill (int pid, struct remote_state *rs)
6986 if (remote_protocol_packets[PACKET_vKill].support == PACKET_DISABLE)
6989 /* Tell the remote target to detach. */
6990 sprintf (rs->buf, "vKill;%x", pid);
6992 getpkt (&rs->buf, &rs->buf_size, 0);
6994 if (packet_ok (rs->buf,
6995 &remote_protocol_packets[PACKET_vKill]) == PACKET_OK)
6997 else if (remote_protocol_packets[PACKET_vKill].support == PACKET_DISABLE)
7004 extended_remote_kill (struct target_ops *ops)
7007 int pid = ptid_get_pid (inferior_ptid);
7008 struct remote_state *rs = get_remote_state ();
7010 res = remote_vkill (pid, rs);
7011 if (res == -1 && !remote_multi_process_p (rs))
7013 /* Don't try 'k' on a multi-process aware stub -- it has no way
7014 to specify the pid. */
7018 getpkt (&rs->buf, &rs->buf_size, 0);
7019 if (rs->buf[0] != 'O' || rs->buf[0] != 'K')
7022 /* Don't wait for it to die. I'm not really sure it matters whether
7023 we do or not. For the existing stubs, kill is a noop. */
7029 error (_("Can't kill process"));
7031 target_mourn_inferior ();
7035 remote_mourn (struct target_ops *ops)
7037 remote_mourn_1 (ops);
7040 /* Worker function for remote_mourn. */
7042 remote_mourn_1 (struct target_ops *target)
7044 unpush_target (target);
7046 /* remote_close takes care of doing most of the clean up. */
7047 generic_mourn_inferior ();
7051 extended_remote_mourn_1 (struct target_ops *target)
7053 struct remote_state *rs = get_remote_state ();
7055 /* In case we got here due to an error, but we're going to stay
7057 rs->waiting_for_stop_reply = 0;
7059 /* We're no longer interested in these events. */
7060 discard_pending_stop_replies (ptid_get_pid (inferior_ptid));
7062 /* If the current general thread belonged to the process we just
7063 detached from or has exited, the remote side current general
7064 thread becomes undefined. Considering a case like this:
7066 - We just got here due to a detach.
7067 - The process that we're detaching from happens to immediately
7068 report a global breakpoint being hit in non-stop mode, in the
7069 same thread we had selected before.
7070 - GDB attaches to this process again.
7071 - This event happens to be the next event we handle.
7073 GDB would consider that the current general thread didn't need to
7074 be set on the stub side (with Hg), since for all it knew,
7075 GENERAL_THREAD hadn't changed.
7077 Notice that although in all-stop mode, the remote server always
7078 sets the current thread to the thread reporting the stop event,
7079 that doesn't happen in non-stop mode; in non-stop, the stub *must
7080 not* change the current thread when reporting a breakpoint hit,
7081 due to the decoupling of event reporting and event handling.
7083 To keep things simple, we always invalidate our notion of the
7085 record_currthread (minus_one_ptid);
7087 /* Unlike "target remote", we do not want to unpush the target; then
7088 the next time the user says "run", we won't be connected. */
7090 /* Call common code to mark the inferior as not running. */
7091 generic_mourn_inferior ();
7093 if (!have_inferiors ())
7095 if (!remote_multi_process_p (rs))
7097 /* Check whether the target is running now - some remote stubs
7098 automatically restart after kill. */
7100 getpkt (&rs->buf, &rs->buf_size, 0);
7102 if (rs->buf[0] == 'S' || rs->buf[0] == 'T')
7104 /* Assume that the target has been restarted. Set inferior_ptid
7105 so that bits of core GDB realizes there's something here, e.g.,
7106 so that the user can say "kill" again. */
7107 inferior_ptid = magic_null_ptid;
7114 extended_remote_mourn (struct target_ops *ops)
7116 extended_remote_mourn_1 (ops);
7120 extended_remote_run (char *args)
7122 struct remote_state *rs = get_remote_state ();
7125 /* If the user has disabled vRun support, or we have detected that
7126 support is not available, do not try it. */
7127 if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE)
7130 strcpy (rs->buf, "vRun;");
7131 len = strlen (rs->buf);
7133 if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ())
7134 error (_("Remote file name too long for run packet"));
7135 len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len, 0);
7137 gdb_assert (args != NULL);
7140 struct cleanup *back_to;
7144 argv = gdb_buildargv (args);
7145 back_to = make_cleanup ((void (*) (void *)) freeargv, argv);
7146 for (i = 0; argv[i] != NULL; i++)
7148 if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ())
7149 error (_("Argument list too long for run packet"));
7150 rs->buf[len++] = ';';
7151 len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len, 0);
7153 do_cleanups (back_to);
7156 rs->buf[len++] = '\0';
7159 getpkt (&rs->buf, &rs->buf_size, 0);
7161 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]) == PACKET_OK)
7163 /* We have a wait response; we don't need it, though. All is well. */
7166 else if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE)
7167 /* It wasn't disabled before, but it is now. */
7171 if (remote_exec_file[0] == '\0')
7172 error (_("Running the default executable on the remote target failed; "
7173 "try \"set remote exec-file\"?"));
7175 error (_("Running \"%s\" on the remote target failed"),
7180 /* In the extended protocol we want to be able to do things like
7181 "run" and have them basically work as expected. So we need
7182 a special create_inferior function. We support changing the
7183 executable file and the command line arguments, but not the
7187 extended_remote_create_inferior_1 (char *exec_file, char *args,
7188 char **env, int from_tty)
7190 /* If running asynchronously, register the target file descriptor
7191 with the event loop. */
7192 if (target_can_async_p ())
7193 target_async (inferior_event_handler, 0);
7195 /* Now restart the remote server. */
7196 if (extended_remote_run (args) == -1)
7198 /* vRun was not supported. Fail if we need it to do what the
7200 if (remote_exec_file[0])
7201 error (_("Remote target does not support \"set remote exec-file\""));
7203 error (_("Remote target does not support \"set args\" or run <ARGS>"));
7205 /* Fall back to "R". */
7206 extended_remote_restart ();
7209 if (!have_inferiors ())
7211 /* Clean up from the last time we ran, before we mark the target
7212 running again. This will mark breakpoints uninserted, and
7213 get_offsets may insert breakpoints. */
7214 init_thread_list ();
7215 init_wait_for_inferior ();
7218 /* Now mark the inferior as running before we do anything else. */
7219 inferior_ptid = magic_null_ptid;
7221 /* Now, if we have thread information, update inferior_ptid. */
7222 inferior_ptid = remote_current_thread (inferior_ptid);
7224 remote_add_inferior (ptid_get_pid (inferior_ptid), 0);
7225 add_thread_silent (inferior_ptid);
7227 /* Get updated offsets, if the stub uses qOffsets. */
7232 extended_remote_create_inferior (struct target_ops *ops,
7233 char *exec_file, char *args,
7234 char **env, int from_tty)
7236 extended_remote_create_inferior_1 (exec_file, args, env, from_tty);
7240 /* Insert a breakpoint. On targets that have software breakpoint
7241 support, we ask the remote target to do the work; on targets
7242 which don't, we insert a traditional memory breakpoint. */
7245 remote_insert_breakpoint (struct gdbarch *gdbarch,
7246 struct bp_target_info *bp_tgt)
7248 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
7249 If it succeeds, then set the support to PACKET_ENABLE. If it
7250 fails, and the user has explicitly requested the Z support then
7251 report an error, otherwise, mark it disabled and go on. */
7253 if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE)
7255 CORE_ADDR addr = bp_tgt->placed_address;
7256 struct remote_state *rs;
7260 gdbarch_remote_breakpoint_from_pc (gdbarch, &addr, &bpsize);
7262 rs = get_remote_state ();
7268 addr = (ULONGEST) remote_address_masked (addr);
7269 p += hexnumstr (p, addr);
7270 sprintf (p, ",%d", bpsize);
7273 getpkt (&rs->buf, &rs->buf_size, 0);
7275 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0]))
7280 bp_tgt->placed_address = addr;
7281 bp_tgt->placed_size = bpsize;
7283 case PACKET_UNKNOWN:
7288 return memory_insert_breakpoint (gdbarch, bp_tgt);
7292 remote_remove_breakpoint (struct gdbarch *gdbarch,
7293 struct bp_target_info *bp_tgt)
7295 CORE_ADDR addr = bp_tgt->placed_address;
7296 struct remote_state *rs = get_remote_state ();
7298 if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE)
7306 addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
7307 p += hexnumstr (p, addr);
7308 sprintf (p, ",%d", bp_tgt->placed_size);
7311 getpkt (&rs->buf, &rs->buf_size, 0);
7313 return (rs->buf[0] == 'E');
7316 return memory_remove_breakpoint (gdbarch, bp_tgt);
7320 watchpoint_to_Z_packet (int type)
7325 return Z_PACKET_WRITE_WP;
7328 return Z_PACKET_READ_WP;
7331 return Z_PACKET_ACCESS_WP;
7334 internal_error (__FILE__, __LINE__,
7335 _("hw_bp_to_z: bad watchpoint type %d"), type);
7340 remote_insert_watchpoint (CORE_ADDR addr, int len, int type)
7342 struct remote_state *rs = get_remote_state ();
7344 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
7346 if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE)
7349 sprintf (rs->buf, "Z%x,", packet);
7350 p = strchr (rs->buf, '\0');
7351 addr = remote_address_masked (addr);
7352 p += hexnumstr (p, (ULONGEST) addr);
7353 sprintf (p, ",%x", len);
7356 getpkt (&rs->buf, &rs->buf_size, 0);
7358 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
7362 case PACKET_UNKNOWN:
7367 internal_error (__FILE__, __LINE__,
7368 _("remote_insert_watchpoint: reached end of function"));
7373 remote_remove_watchpoint (CORE_ADDR addr, int len, int type)
7375 struct remote_state *rs = get_remote_state ();
7377 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
7379 if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE)
7382 sprintf (rs->buf, "z%x,", packet);
7383 p = strchr (rs->buf, '\0');
7384 addr = remote_address_masked (addr);
7385 p += hexnumstr (p, (ULONGEST) addr);
7386 sprintf (p, ",%x", len);
7388 getpkt (&rs->buf, &rs->buf_size, 0);
7390 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
7393 case PACKET_UNKNOWN:
7398 internal_error (__FILE__, __LINE__,
7399 _("remote_remove_watchpoint: reached end of function"));
7403 int remote_hw_watchpoint_limit = -1;
7404 int remote_hw_breakpoint_limit = -1;
7407 remote_check_watch_resources (int type, int cnt, int ot)
7409 if (type == bp_hardware_breakpoint)
7411 if (remote_hw_breakpoint_limit == 0)
7413 else if (remote_hw_breakpoint_limit < 0)
7415 else if (cnt <= remote_hw_breakpoint_limit)
7420 if (remote_hw_watchpoint_limit == 0)
7422 else if (remote_hw_watchpoint_limit < 0)
7426 else if (cnt <= remote_hw_watchpoint_limit)
7433 remote_stopped_by_watchpoint (void)
7435 return remote_stopped_by_watchpoint_p;
7439 remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
7442 if (remote_stopped_by_watchpoint ())
7444 *addr_p = remote_watch_data_address;
7453 remote_insert_hw_breakpoint (struct gdbarch *gdbarch,
7454 struct bp_target_info *bp_tgt)
7457 struct remote_state *rs;
7460 /* The length field should be set to the size of a breakpoint
7461 instruction, even though we aren't inserting one ourselves. */
7463 gdbarch_remote_breakpoint_from_pc
7464 (gdbarch, &bp_tgt->placed_address, &bp_tgt->placed_size);
7466 if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
7469 rs = get_remote_state ();
7476 addr = remote_address_masked (bp_tgt->placed_address);
7477 p += hexnumstr (p, (ULONGEST) addr);
7478 sprintf (p, ",%x", bp_tgt->placed_size);
7481 getpkt (&rs->buf, &rs->buf_size, 0);
7483 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
7486 case PACKET_UNKNOWN:
7491 internal_error (__FILE__, __LINE__,
7492 _("remote_insert_hw_breakpoint: reached end of function"));
7497 remote_remove_hw_breakpoint (struct gdbarch *gdbarch,
7498 struct bp_target_info *bp_tgt)
7501 struct remote_state *rs = get_remote_state ();
7504 if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
7511 addr = remote_address_masked (bp_tgt->placed_address);
7512 p += hexnumstr (p, (ULONGEST) addr);
7513 sprintf (p, ",%x", bp_tgt->placed_size);
7516 getpkt (&rs->buf, &rs->buf_size, 0);
7518 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
7521 case PACKET_UNKNOWN:
7526 internal_error (__FILE__, __LINE__,
7527 _("remote_remove_hw_breakpoint: reached end of function"));
7530 /* Table used by the crc32 function to calcuate the checksum. */
7532 static unsigned long crc32_table[256] =
7535 static unsigned long
7536 crc32 (unsigned char *buf, int len, unsigned int crc)
7538 if (!crc32_table[1])
7540 /* Initialize the CRC table and the decoding table. */
7544 for (i = 0; i < 256; i++)
7546 for (c = i << 24, j = 8; j > 0; --j)
7547 c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
7554 crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255];
7560 /* compare-sections command
7562 With no arguments, compares each loadable section in the exec bfd
7563 with the same memory range on the target, and reports mismatches.
7564 Useful for verifying the image on the target against the exec file.
7565 Depends on the target understanding the new "qCRC:" request. */
7567 /* FIXME: cagney/1999-10-26: This command should be broken down into a
7568 target method (target verify memory) and generic version of the
7569 actual command. This will allow other high-level code (especially
7570 generic_load()) to make use of this target functionality. */
7573 compare_sections_command (char *args, int from_tty)
7575 struct remote_state *rs = get_remote_state ();
7577 unsigned long host_crc, target_crc;
7578 struct cleanup *old_chain;
7581 const char *sectname;
7588 error (_("command cannot be used without an exec file"));
7589 if (!current_target.to_shortname ||
7590 strcmp (current_target.to_shortname, "remote") != 0)
7591 error (_("command can only be used with remote target"));
7593 for (s = exec_bfd->sections; s; s = s->next)
7595 if (!(s->flags & SEC_LOAD))
7596 continue; /* skip non-loadable section */
7598 size = bfd_get_section_size (s);
7600 continue; /* skip zero-length section */
7602 sectname = bfd_get_section_name (exec_bfd, s);
7603 if (args && strcmp (args, sectname) != 0)
7604 continue; /* not the section selected by user */
7606 matched = 1; /* do this section */
7608 /* FIXME: assumes lma can fit into long. */
7609 xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx",
7610 (long) lma, (long) size);
7613 /* Be clever; compute the host_crc before waiting for target
7615 sectdata = xmalloc (size);
7616 old_chain = make_cleanup (xfree, sectdata);
7617 bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
7618 host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff);
7620 getpkt (&rs->buf, &rs->buf_size, 0);
7621 if (rs->buf[0] == 'E')
7622 error (_("target memory fault, section %s, range %s -- %s"), sectname,
7623 paddress (target_gdbarch, lma),
7624 paddress (target_gdbarch, lma + size));
7625 if (rs->buf[0] != 'C')
7626 error (_("remote target does not support this operation"));
7628 for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++)
7629 target_crc = target_crc * 16 + fromhex (*tmp);
7631 printf_filtered ("Section %s, range %s -- %s: ", sectname,
7632 paddress (target_gdbarch, lma),
7633 paddress (target_gdbarch, lma + size));
7634 if (host_crc == target_crc)
7635 printf_filtered ("matched.\n");
7638 printf_filtered ("MIS-MATCHED!\n");
7642 do_cleanups (old_chain);
7645 warning (_("One or more sections of the remote executable does not match\n\
7646 the loaded file\n"));
7647 if (args && !matched)
7648 printf_filtered (_("No loaded section named '%s'.\n"), args);
7651 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
7652 into remote target. The number of bytes written to the remote
7653 target is returned, or -1 for error. */
7656 remote_write_qxfer (struct target_ops *ops, const char *object_name,
7657 const char *annex, const gdb_byte *writebuf,
7658 ULONGEST offset, LONGEST len,
7659 struct packet_config *packet)
7663 struct remote_state *rs = get_remote_state ();
7664 int max_size = get_memory_write_packet_size ();
7666 if (packet->support == PACKET_DISABLE)
7669 /* Insert header. */
7670 i = snprintf (rs->buf, max_size,
7671 "qXfer:%s:write:%s:%s:",
7672 object_name, annex ? annex : "",
7673 phex_nz (offset, sizeof offset));
7674 max_size -= (i + 1);
7676 /* Escape as much data as fits into rs->buf. */
7677 buf_len = remote_escape_output
7678 (writebuf, len, (rs->buf + i), &max_size, max_size);
7680 if (putpkt_binary (rs->buf, i + buf_len) < 0
7681 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
7682 || packet_ok (rs->buf, packet) != PACKET_OK)
7685 unpack_varlen_hex (rs->buf, &n);
7689 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
7690 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
7691 number of bytes read is returned, or 0 for EOF, or -1 for error.
7692 The number of bytes read may be less than LEN without indicating an
7693 EOF. PACKET is checked and updated to indicate whether the remote
7694 target supports this object. */
7697 remote_read_qxfer (struct target_ops *ops, const char *object_name,
7699 gdb_byte *readbuf, ULONGEST offset, LONGEST len,
7700 struct packet_config *packet)
7702 static char *finished_object;
7703 static char *finished_annex;
7704 static ULONGEST finished_offset;
7706 struct remote_state *rs = get_remote_state ();
7707 LONGEST i, n, packet_len;
7709 if (packet->support == PACKET_DISABLE)
7712 /* Check whether we've cached an end-of-object packet that matches
7714 if (finished_object)
7716 if (strcmp (object_name, finished_object) == 0
7717 && strcmp (annex ? annex : "", finished_annex) == 0
7718 && offset == finished_offset)
7721 /* Otherwise, we're now reading something different. Discard
7723 xfree (finished_object);
7724 xfree (finished_annex);
7725 finished_object = NULL;
7726 finished_annex = NULL;
7729 /* Request only enough to fit in a single packet. The actual data
7730 may not, since we don't know how much of it will need to be escaped;
7731 the target is free to respond with slightly less data. We subtract
7732 five to account for the response type and the protocol frame. */
7733 n = min (get_remote_packet_size () - 5, len);
7734 snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
7735 object_name, annex ? annex : "",
7736 phex_nz (offset, sizeof offset),
7737 phex_nz (n, sizeof n));
7738 i = putpkt (rs->buf);
7743 packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0);
7744 if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK)
7747 if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
7748 error (_("Unknown remote qXfer reply: %s"), rs->buf);
7750 /* 'm' means there is (or at least might be) more data after this
7751 batch. That does not make sense unless there's at least one byte
7752 of data in this reply. */
7753 if (rs->buf[0] == 'm' && packet_len == 1)
7754 error (_("Remote qXfer reply contained no data."));
7756 /* Got some data. */
7757 i = remote_unescape_input (rs->buf + 1, packet_len - 1, readbuf, n);
7759 /* 'l' is an EOF marker, possibly including a final block of data,
7760 or possibly empty. If we have the final block of a non-empty
7761 object, record this fact to bypass a subsequent partial read. */
7762 if (rs->buf[0] == 'l' && offset + i > 0)
7764 finished_object = xstrdup (object_name);
7765 finished_annex = xstrdup (annex ? annex : "");
7766 finished_offset = offset + i;
7773 remote_xfer_partial (struct target_ops *ops, enum target_object object,
7774 const char *annex, gdb_byte *readbuf,
7775 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
7777 struct remote_state *rs;
7782 set_general_thread (inferior_ptid);
7784 rs = get_remote_state ();
7786 /* Handle memory using the standard memory routines. */
7787 if (object == TARGET_OBJECT_MEMORY)
7792 /* If the remote target is connected but not running, we should
7793 pass this request down to a lower stratum (e.g. the executable
7795 if (!target_has_execution)
7798 if (writebuf != NULL)
7799 xfered = remote_write_bytes (offset, writebuf, len);
7801 xfered = remote_read_bytes (offset, readbuf, len);
7805 else if (xfered == 0 && errno == 0)
7811 /* Handle SPU memory using qxfer packets. */
7812 if (object == TARGET_OBJECT_SPU)
7815 return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len,
7816 &remote_protocol_packets
7817 [PACKET_qXfer_spu_read]);
7819 return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len,
7820 &remote_protocol_packets
7821 [PACKET_qXfer_spu_write]);
7824 /* Handle extra signal info using qxfer packets. */
7825 if (object == TARGET_OBJECT_SIGNAL_INFO)
7828 return remote_read_qxfer (ops, "siginfo", annex, readbuf, offset, len,
7829 &remote_protocol_packets
7830 [PACKET_qXfer_siginfo_read]);
7832 return remote_write_qxfer (ops, "siginfo", annex, writebuf, offset, len,
7833 &remote_protocol_packets
7834 [PACKET_qXfer_siginfo_write]);
7837 /* Only handle flash writes. */
7838 if (writebuf != NULL)
7844 case TARGET_OBJECT_FLASH:
7845 xfered = remote_flash_write (ops, offset, len, writebuf);
7849 else if (xfered == 0 && errno == 0)
7859 /* Map pre-existing objects onto letters. DO NOT do this for new
7860 objects!!! Instead specify new query packets. */
7863 case TARGET_OBJECT_AVR:
7867 case TARGET_OBJECT_AUXV:
7868 gdb_assert (annex == NULL);
7869 return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len,
7870 &remote_protocol_packets[PACKET_qXfer_auxv]);
7872 case TARGET_OBJECT_AVAILABLE_FEATURES:
7873 return remote_read_qxfer
7874 (ops, "features", annex, readbuf, offset, len,
7875 &remote_protocol_packets[PACKET_qXfer_features]);
7877 case TARGET_OBJECT_LIBRARIES:
7878 return remote_read_qxfer
7879 (ops, "libraries", annex, readbuf, offset, len,
7880 &remote_protocol_packets[PACKET_qXfer_libraries]);
7882 case TARGET_OBJECT_MEMORY_MAP:
7883 gdb_assert (annex == NULL);
7884 return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len,
7885 &remote_protocol_packets[PACKET_qXfer_memory_map]);
7887 case TARGET_OBJECT_OSDATA:
7888 /* Should only get here if we're connected. */
7889 gdb_assert (remote_desc);
7890 return remote_read_qxfer
7891 (ops, "osdata", annex, readbuf, offset, len,
7892 &remote_protocol_packets[PACKET_qXfer_osdata]);
7894 case TARGET_OBJECT_THREADS:
7895 gdb_assert (annex == NULL);
7896 return remote_read_qxfer (ops, "threads", annex, readbuf, offset, len,
7897 &remote_protocol_packets[PACKET_qXfer_threads]);
7903 /* Note: a zero OFFSET and LEN can be used to query the minimum
7905 if (offset == 0 && len == 0)
7906 return (get_remote_packet_size ());
7907 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
7908 large enough let the caller deal with it. */
7909 if (len < get_remote_packet_size ())
7911 len = get_remote_packet_size ();
7913 /* Except for querying the minimum buffer size, target must be open. */
7915 error (_("remote query is only available after target open"));
7917 gdb_assert (annex != NULL);
7918 gdb_assert (readbuf != NULL);
7924 /* We used one buffer char for the remote protocol q command and
7925 another for the query type. As the remote protocol encapsulation
7926 uses 4 chars plus one extra in case we are debugging
7927 (remote_debug), we have PBUFZIZ - 7 left to pack the query
7930 while (annex[i] && (i < (get_remote_packet_size () - 8)))
7932 /* Bad caller may have sent forbidden characters. */
7933 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
7938 gdb_assert (annex[i] == '\0');
7940 i = putpkt (rs->buf);
7944 getpkt (&rs->buf, &rs->buf_size, 0);
7945 strcpy ((char *) readbuf, rs->buf);
7947 return strlen ((char *) readbuf);
7951 remote_search_memory (struct target_ops* ops,
7952 CORE_ADDR start_addr, ULONGEST search_space_len,
7953 const gdb_byte *pattern, ULONGEST pattern_len,
7954 CORE_ADDR *found_addrp)
7956 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
7957 struct remote_state *rs = get_remote_state ();
7958 int max_size = get_memory_write_packet_size ();
7959 struct packet_config *packet =
7960 &remote_protocol_packets[PACKET_qSearch_memory];
7961 /* number of packet bytes used to encode the pattern,
7962 this could be more than PATTERN_LEN due to escape characters */
7963 int escaped_pattern_len;
7964 /* amount of pattern that was encodable in the packet */
7965 int used_pattern_len;
7968 ULONGEST found_addr;
7970 /* Don't go to the target if we don't have to.
7971 This is done before checking packet->support to avoid the possibility that
7972 a success for this edge case means the facility works in general. */
7973 if (pattern_len > search_space_len)
7975 if (pattern_len == 0)
7977 *found_addrp = start_addr;
7981 /* If we already know the packet isn't supported, fall back to the simple
7982 way of searching memory. */
7984 if (packet->support == PACKET_DISABLE)
7986 /* Target doesn't provided special support, fall back and use the
7987 standard support (copy memory and do the search here). */
7988 return simple_search_memory (ops, start_addr, search_space_len,
7989 pattern, pattern_len, found_addrp);
7992 /* Insert header. */
7993 i = snprintf (rs->buf, max_size,
7994 "qSearch:memory:%s;%s;",
7995 phex_nz (start_addr, addr_size),
7996 phex_nz (search_space_len, sizeof (search_space_len)));
7997 max_size -= (i + 1);
7999 /* Escape as much data as fits into rs->buf. */
8000 escaped_pattern_len =
8001 remote_escape_output (pattern, pattern_len, (rs->buf + i),
8002 &used_pattern_len, max_size);
8004 /* Bail if the pattern is too large. */
8005 if (used_pattern_len != pattern_len)
8006 error ("Pattern is too large to transmit to remote target.");
8008 if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0
8009 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
8010 || packet_ok (rs->buf, packet) != PACKET_OK)
8012 /* The request may not have worked because the command is not
8013 supported. If so, fall back to the simple way. */
8014 if (packet->support == PACKET_DISABLE)
8016 return simple_search_memory (ops, start_addr, search_space_len,
8017 pattern, pattern_len, found_addrp);
8022 if (rs->buf[0] == '0')
8024 else if (rs->buf[0] == '1')
8027 if (rs->buf[1] != ',')
8028 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
8029 unpack_varlen_hex (rs->buf + 2, &found_addr);
8030 *found_addrp = found_addr;
8033 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
8039 remote_rcmd (char *command,
8040 struct ui_file *outbuf)
8042 struct remote_state *rs = get_remote_state ();
8046 error (_("remote rcmd is only available after target open"));
8048 /* Send a NULL command across as an empty command. */
8049 if (command == NULL)
8052 /* The query prefix. */
8053 strcpy (rs->buf, "qRcmd,");
8054 p = strchr (rs->buf, '\0');
8056 if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/) > get_remote_packet_size ())
8057 error (_("\"monitor\" command ``%s'' is too long."), command);
8059 /* Encode the actual command. */
8060 bin2hex ((gdb_byte *) command, p, 0);
8062 if (putpkt (rs->buf) < 0)
8063 error (_("Communication problem with target."));
8065 /* get/display the response */
8070 /* XXX - see also remote_get_noisy_reply(). */
8072 getpkt (&rs->buf, &rs->buf_size, 0);
8075 error (_("Target does not support this command."));
8076 if (buf[0] == 'O' && buf[1] != 'K')
8078 remote_console_output (buf + 1); /* 'O' message from stub. */
8081 if (strcmp (buf, "OK") == 0)
8083 if (strlen (buf) == 3 && buf[0] == 'E'
8084 && isdigit (buf[1]) && isdigit (buf[2]))
8086 error (_("Protocol error with Rcmd"));
8088 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
8090 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
8091 fputc_unfiltered (c, outbuf);
8097 static VEC(mem_region_s) *
8098 remote_memory_map (struct target_ops *ops)
8100 VEC(mem_region_s) *result = NULL;
8101 char *text = target_read_stralloc (¤t_target,
8102 TARGET_OBJECT_MEMORY_MAP, NULL);
8106 struct cleanup *back_to = make_cleanup (xfree, text);
8107 result = parse_memory_map (text);
8108 do_cleanups (back_to);
8115 packet_command (char *args, int from_tty)
8117 struct remote_state *rs = get_remote_state ();
8120 error (_("command can only be used with remote target"));
8123 error (_("remote-packet command requires packet text as argument"));
8125 puts_filtered ("sending: ");
8126 print_packet (args);
8127 puts_filtered ("\n");
8130 getpkt (&rs->buf, &rs->buf_size, 0);
8131 puts_filtered ("received: ");
8132 print_packet (rs->buf);
8133 puts_filtered ("\n");
8137 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
8139 static void display_thread_info (struct gdb_ext_thread_info *info);
8141 static void threadset_test_cmd (char *cmd, int tty);
8143 static void threadalive_test (char *cmd, int tty);
8145 static void threadlist_test_cmd (char *cmd, int tty);
8147 int get_and_display_threadinfo (threadref *ref);
8149 static void threadinfo_test_cmd (char *cmd, int tty);
8151 static int thread_display_step (threadref *ref, void *context);
8153 static void threadlist_update_test_cmd (char *cmd, int tty);
8155 static void init_remote_threadtests (void);
8157 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
8160 threadset_test_cmd (char *cmd, int tty)
8162 int sample_thread = SAMPLE_THREAD;
8164 printf_filtered (_("Remote threadset test\n"));
8165 set_general_thread (sample_thread);
8170 threadalive_test (char *cmd, int tty)
8172 int sample_thread = SAMPLE_THREAD;
8173 int pid = ptid_get_pid (inferior_ptid);
8174 ptid_t ptid = ptid_build (pid, 0, sample_thread);
8176 if (remote_thread_alive (ptid))
8177 printf_filtered ("PASS: Thread alive test\n");
8179 printf_filtered ("FAIL: Thread alive test\n");
8182 void output_threadid (char *title, threadref *ref);
8185 output_threadid (char *title, threadref *ref)
8189 pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
8191 printf_filtered ("%s %s\n", title, (&hexid[0]));
8195 threadlist_test_cmd (char *cmd, int tty)
8198 threadref nextthread;
8199 int done, result_count;
8200 threadref threadlist[3];
8202 printf_filtered ("Remote Threadlist test\n");
8203 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
8204 &result_count, &threadlist[0]))
8205 printf_filtered ("FAIL: threadlist test\n");
8208 threadref *scan = threadlist;
8209 threadref *limit = scan + result_count;
8211 while (scan < limit)
8212 output_threadid (" thread ", scan++);
8217 display_thread_info (struct gdb_ext_thread_info *info)
8219 output_threadid ("Threadid: ", &info->threadid);
8220 printf_filtered ("Name: %s\n ", info->shortname);
8221 printf_filtered ("State: %s\n", info->display);
8222 printf_filtered ("other: %s\n\n", info->more_display);
8226 get_and_display_threadinfo (threadref *ref)
8230 struct gdb_ext_thread_info threadinfo;
8232 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
8233 | TAG_MOREDISPLAY | TAG_DISPLAY;
8234 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
8235 display_thread_info (&threadinfo);
8240 threadinfo_test_cmd (char *cmd, int tty)
8242 int athread = SAMPLE_THREAD;
8246 int_to_threadref (&thread, athread);
8247 printf_filtered ("Remote Threadinfo test\n");
8248 if (!get_and_display_threadinfo (&thread))
8249 printf_filtered ("FAIL cannot get thread info\n");
8253 thread_display_step (threadref *ref, void *context)
8255 /* output_threadid(" threadstep ",ref); *//* simple test */
8256 return get_and_display_threadinfo (ref);
8260 threadlist_update_test_cmd (char *cmd, int tty)
8262 printf_filtered ("Remote Threadlist update test\n");
8263 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
8267 init_remote_threadtests (void)
8269 add_com ("tlist", class_obscure, threadlist_test_cmd, _("\
8270 Fetch and print the remote list of thread identifiers, one pkt only"));
8271 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
8272 _("Fetch and display info about one thread"));
8273 add_com ("tset", class_obscure, threadset_test_cmd,
8274 _("Test setting to a different thread"));
8275 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
8276 _("Iterate through updating all remote thread info"));
8277 add_com ("talive", class_obscure, threadalive_test,
8278 _(" Remote thread alive test "));
8283 /* Convert a thread ID to a string. Returns the string in a static
8287 remote_pid_to_str (struct target_ops *ops, ptid_t ptid)
8289 static char buf[64];
8290 struct remote_state *rs = get_remote_state ();
8292 if (ptid_is_pid (ptid))
8294 /* Printing an inferior target id. */
8296 /* When multi-process extensions are off, there's no way in the
8297 remote protocol to know the remote process id, if there's any
8298 at all. There's one exception --- when we're connected with
8299 target extended-remote, and we manually attached to a process
8300 with "attach PID". We don't record anywhere a flag that
8301 allows us to distinguish that case from the case of
8302 connecting with extended-remote and the stub already being
8303 attached to a process, and reporting yes to qAttached, hence
8304 no smart special casing here. */
8305 if (!remote_multi_process_p (rs))
8307 xsnprintf (buf, sizeof buf, "Remote target");
8311 return normal_pid_to_str (ptid);
8315 if (ptid_equal (magic_null_ptid, ptid))
8316 xsnprintf (buf, sizeof buf, "Thread <main>");
8317 else if (remote_multi_process_p (rs))
8318 xsnprintf (buf, sizeof buf, "Thread %d.%ld",
8319 ptid_get_pid (ptid), ptid_get_tid (ptid));
8321 xsnprintf (buf, sizeof buf, "Thread %ld",
8322 ptid_get_tid (ptid));
8327 /* Get the address of the thread local variable in OBJFILE which is
8328 stored at OFFSET within the thread local storage for thread PTID. */
8331 remote_get_thread_local_address (struct target_ops *ops,
8332 ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset)
8334 if (remote_protocol_packets[PACKET_qGetTLSAddr].support != PACKET_DISABLE)
8336 struct remote_state *rs = get_remote_state ();
8338 char *endp = rs->buf + get_remote_packet_size ();
8339 enum packet_result result;
8341 strcpy (p, "qGetTLSAddr:");
8343 p = write_ptid (p, endp, ptid);
8345 p += hexnumstr (p, offset);
8347 p += hexnumstr (p, lm);
8351 getpkt (&rs->buf, &rs->buf_size, 0);
8352 result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_qGetTLSAddr]);
8353 if (result == PACKET_OK)
8357 unpack_varlen_hex (rs->buf, &result);
8360 else if (result == PACKET_UNKNOWN)
8361 throw_error (TLS_GENERIC_ERROR,
8362 _("Remote target doesn't support qGetTLSAddr packet"));
8364 throw_error (TLS_GENERIC_ERROR,
8365 _("Remote target failed to process qGetTLSAddr request"));
8368 throw_error (TLS_GENERIC_ERROR,
8369 _("TLS not supported or disabled on this target"));
8374 /* Support for inferring a target description based on the current
8375 architecture and the size of a 'g' packet. While the 'g' packet
8376 can have any size (since optional registers can be left off the
8377 end), some sizes are easily recognizable given knowledge of the
8378 approximate architecture. */
8380 struct remote_g_packet_guess
8383 const struct target_desc *tdesc;
8385 typedef struct remote_g_packet_guess remote_g_packet_guess_s;
8386 DEF_VEC_O(remote_g_packet_guess_s);
8388 struct remote_g_packet_data
8390 VEC(remote_g_packet_guess_s) *guesses;
8393 static struct gdbarch_data *remote_g_packet_data_handle;
8396 remote_g_packet_data_init (struct obstack *obstack)
8398 return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data);
8402 register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
8403 const struct target_desc *tdesc)
8405 struct remote_g_packet_data *data
8406 = gdbarch_data (gdbarch, remote_g_packet_data_handle);
8407 struct remote_g_packet_guess new_guess, *guess;
8410 gdb_assert (tdesc != NULL);
8413 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
8415 if (guess->bytes == bytes)
8416 internal_error (__FILE__, __LINE__,
8417 "Duplicate g packet description added for size %d",
8420 new_guess.bytes = bytes;
8421 new_guess.tdesc = tdesc;
8422 VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess);
8425 /* Return 1 if remote_read_description would do anything on this target
8426 and architecture, 0 otherwise. */
8429 remote_read_description_p (struct target_ops *target)
8431 struct remote_g_packet_data *data
8432 = gdbarch_data (target_gdbarch, remote_g_packet_data_handle);
8434 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
8440 static const struct target_desc *
8441 remote_read_description (struct target_ops *target)
8443 struct remote_g_packet_data *data
8444 = gdbarch_data (target_gdbarch, remote_g_packet_data_handle);
8446 /* Do not try this during initial connection, when we do not know
8447 whether there is a running but stopped thread. */
8448 if (!target_has_execution || ptid_equal (inferior_ptid, null_ptid))
8451 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
8453 struct remote_g_packet_guess *guess;
8455 int bytes = send_g_packet ();
8458 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
8460 if (guess->bytes == bytes)
8461 return guess->tdesc;
8463 /* We discard the g packet. A minor optimization would be to
8464 hold on to it, and fill the register cache once we have selected
8465 an architecture, but it's too tricky to do safely. */
8471 /* Remote file transfer support. This is host-initiated I/O, not
8472 target-initiated; for target-initiated, see remote-fileio.c. */
8474 /* If *LEFT is at least the length of STRING, copy STRING to
8475 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8476 decrease *LEFT. Otherwise raise an error. */
8479 remote_buffer_add_string (char **buffer, int *left, char *string)
8481 int len = strlen (string);
8484 error (_("Packet too long for target."));
8486 memcpy (*buffer, string, len);
8490 /* NUL-terminate the buffer as a convenience, if there is
8496 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
8497 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8498 decrease *LEFT. Otherwise raise an error. */
8501 remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
8504 if (2 * len > *left)
8505 error (_("Packet too long for target."));
8507 bin2hex (bytes, *buffer, len);
8511 /* NUL-terminate the buffer as a convenience, if there is
8517 /* If *LEFT is large enough, convert VALUE to hex and add it to
8518 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8519 decrease *LEFT. Otherwise raise an error. */
8522 remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
8524 int len = hexnumlen (value);
8527 error (_("Packet too long for target."));
8529 hexnumstr (*buffer, value);
8533 /* NUL-terminate the buffer as a convenience, if there is
8539 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
8540 value, *REMOTE_ERRNO to the remote error number or zero if none
8541 was included, and *ATTACHMENT to point to the start of the annex
8542 if any. The length of the packet isn't needed here; there may
8543 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
8545 Return 0 if the packet could be parsed, -1 if it could not. If
8546 -1 is returned, the other variables may not be initialized. */
8549 remote_hostio_parse_result (char *buffer, int *retcode,
8550 int *remote_errno, char **attachment)
8557 if (buffer[0] != 'F')
8561 *retcode = strtol (&buffer[1], &p, 16);
8562 if (errno != 0 || p == &buffer[1])
8565 /* Check for ",errno". */
8569 *remote_errno = strtol (p + 1, &p2, 16);
8570 if (errno != 0 || p + 1 == p2)
8575 /* Check for ";attachment". If there is no attachment, the
8576 packet should end here. */
8579 *attachment = p + 1;
8582 else if (*p == '\0')
8588 /* Send a prepared I/O packet to the target and read its response.
8589 The prepared packet is in the global RS->BUF before this function
8590 is called, and the answer is there when we return.
8592 COMMAND_BYTES is the length of the request to send, which may include
8593 binary data. WHICH_PACKET is the packet configuration to check
8594 before attempting a packet. If an error occurs, *REMOTE_ERRNO
8595 is set to the error number and -1 is returned. Otherwise the value
8596 returned by the function is returned.
8598 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
8599 attachment is expected; an error will be reported if there's a
8600 mismatch. If one is found, *ATTACHMENT will be set to point into
8601 the packet buffer and *ATTACHMENT_LEN will be set to the
8602 attachment's length. */
8605 remote_hostio_send_command (int command_bytes, int which_packet,
8606 int *remote_errno, char **attachment,
8607 int *attachment_len)
8609 struct remote_state *rs = get_remote_state ();
8610 int ret, bytes_read;
8611 char *attachment_tmp;
8614 || remote_protocol_packets[which_packet].support == PACKET_DISABLE)
8616 *remote_errno = FILEIO_ENOSYS;
8620 putpkt_binary (rs->buf, command_bytes);
8621 bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0);
8623 /* If it timed out, something is wrong. Don't try to parse the
8627 *remote_errno = FILEIO_EINVAL;
8631 switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
8634 *remote_errno = FILEIO_EINVAL;
8636 case PACKET_UNKNOWN:
8637 *remote_errno = FILEIO_ENOSYS;
8643 if (remote_hostio_parse_result (rs->buf, &ret, remote_errno,
8646 *remote_errno = FILEIO_EINVAL;
8650 /* Make sure we saw an attachment if and only if we expected one. */
8651 if ((attachment_tmp == NULL && attachment != NULL)
8652 || (attachment_tmp != NULL && attachment == NULL))
8654 *remote_errno = FILEIO_EINVAL;
8658 /* If an attachment was found, it must point into the packet buffer;
8659 work out how many bytes there were. */
8660 if (attachment_tmp != NULL)
8662 *attachment = attachment_tmp;
8663 *attachment_len = bytes_read - (*attachment - rs->buf);
8669 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
8670 remote file descriptor, or -1 if an error occurs (and set
8674 remote_hostio_open (const char *filename, int flags, int mode,
8677 struct remote_state *rs = get_remote_state ();
8679 int left = get_remote_packet_size () - 1;
8681 remote_buffer_add_string (&p, &left, "vFile:open:");
8683 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
8685 remote_buffer_add_string (&p, &left, ",");
8687 remote_buffer_add_int (&p, &left, flags);
8688 remote_buffer_add_string (&p, &left, ",");
8690 remote_buffer_add_int (&p, &left, mode);
8692 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open,
8693 remote_errno, NULL, NULL);
8696 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
8697 Return the number of bytes written, or -1 if an error occurs (and
8698 set *REMOTE_ERRNO). */
8701 remote_hostio_pwrite (int fd, const gdb_byte *write_buf, int len,
8702 ULONGEST offset, int *remote_errno)
8704 struct remote_state *rs = get_remote_state ();
8706 int left = get_remote_packet_size ();
8709 remote_buffer_add_string (&p, &left, "vFile:pwrite:");
8711 remote_buffer_add_int (&p, &left, fd);
8712 remote_buffer_add_string (&p, &left, ",");
8714 remote_buffer_add_int (&p, &left, offset);
8715 remote_buffer_add_string (&p, &left, ",");
8717 p += remote_escape_output (write_buf, len, p, &out_len,
8718 get_remote_packet_size () - (p - rs->buf));
8720 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite,
8721 remote_errno, NULL, NULL);
8724 /* Read up to LEN bytes FD on the remote target into READ_BUF
8725 Return the number of bytes read, or -1 if an error occurs (and
8726 set *REMOTE_ERRNO). */
8729 remote_hostio_pread (int fd, gdb_byte *read_buf, int len,
8730 ULONGEST offset, int *remote_errno)
8732 struct remote_state *rs = get_remote_state ();
8735 int left = get_remote_packet_size ();
8736 int ret, attachment_len;
8739 remote_buffer_add_string (&p, &left, "vFile:pread:");
8741 remote_buffer_add_int (&p, &left, fd);
8742 remote_buffer_add_string (&p, &left, ",");
8744 remote_buffer_add_int (&p, &left, len);
8745 remote_buffer_add_string (&p, &left, ",");
8747 remote_buffer_add_int (&p, &left, offset);
8749 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread,
8750 remote_errno, &attachment,
8756 read_len = remote_unescape_input (attachment, attachment_len,
8758 if (read_len != ret)
8759 error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
8764 /* Close FD on the remote target. Return 0, or -1 if an error occurs
8765 (and set *REMOTE_ERRNO). */
8768 remote_hostio_close (int fd, int *remote_errno)
8770 struct remote_state *rs = get_remote_state ();
8772 int left = get_remote_packet_size () - 1;
8774 remote_buffer_add_string (&p, &left, "vFile:close:");
8776 remote_buffer_add_int (&p, &left, fd);
8778 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close,
8779 remote_errno, NULL, NULL);
8782 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
8783 occurs (and set *REMOTE_ERRNO). */
8786 remote_hostio_unlink (const char *filename, int *remote_errno)
8788 struct remote_state *rs = get_remote_state ();
8790 int left = get_remote_packet_size () - 1;
8792 remote_buffer_add_string (&p, &left, "vFile:unlink:");
8794 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
8797 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink,
8798 remote_errno, NULL, NULL);
8802 remote_fileio_errno_to_host (int errnum)
8826 case FILEIO_ENOTDIR:
8846 case FILEIO_ENAMETOOLONG:
8847 return ENAMETOOLONG;
8853 remote_hostio_error (int errnum)
8855 int host_error = remote_fileio_errno_to_host (errnum);
8857 if (host_error == -1)
8858 error (_("Unknown remote I/O error %d"), errnum);
8860 error (_("Remote I/O error: %s"), safe_strerror (host_error));
8864 remote_hostio_close_cleanup (void *opaque)
8866 int fd = *(int *) opaque;
8869 remote_hostio_close (fd, &remote_errno);
8874 remote_bfd_iovec_open (struct bfd *abfd, void *open_closure)
8876 const char *filename = bfd_get_filename (abfd);
8877 int fd, remote_errno;
8880 gdb_assert (remote_filename_p (filename));
8882 fd = remote_hostio_open (filename + 7, FILEIO_O_RDONLY, 0, &remote_errno);
8885 errno = remote_fileio_errno_to_host (remote_errno);
8886 bfd_set_error (bfd_error_system_call);
8890 stream = xmalloc (sizeof (int));
8896 remote_bfd_iovec_close (struct bfd *abfd, void *stream)
8898 int fd = *(int *)stream;
8903 /* Ignore errors on close; these may happen if the remote
8904 connection was already torn down. */
8905 remote_hostio_close (fd, &remote_errno);
8911 remote_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf,
8912 file_ptr nbytes, file_ptr offset)
8914 int fd = *(int *)stream;
8916 file_ptr pos, bytes;
8919 while (nbytes > pos)
8921 bytes = remote_hostio_pread (fd, (char *)buf + pos, nbytes - pos,
8922 offset + pos, &remote_errno);
8924 /* Success, but no bytes, means end-of-file. */
8928 errno = remote_fileio_errno_to_host (remote_errno);
8929 bfd_set_error (bfd_error_system_call);
8940 remote_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb)
8942 /* FIXME: We should probably implement remote_hostio_stat. */
8943 sb->st_size = INT_MAX;
8948 remote_filename_p (const char *filename)
8950 return strncmp (filename, "remote:", 7) == 0;
8954 remote_bfd_open (const char *remote_file, const char *target)
8956 return bfd_openr_iovec (remote_file, target,
8957 remote_bfd_iovec_open, NULL,
8958 remote_bfd_iovec_pread,
8959 remote_bfd_iovec_close,
8960 remote_bfd_iovec_stat);
8964 remote_file_put (const char *local_file, const char *remote_file, int from_tty)
8966 struct cleanup *back_to, *close_cleanup;
8967 int retcode, fd, remote_errno, bytes, io_size;
8970 int bytes_in_buffer;
8975 error (_("command can only be used with remote target"));
8977 file = fopen (local_file, "rb");
8979 perror_with_name (local_file);
8980 back_to = make_cleanup_fclose (file);
8982 fd = remote_hostio_open (remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
8984 0700, &remote_errno);
8986 remote_hostio_error (remote_errno);
8988 /* Send up to this many bytes at once. They won't all fit in the
8989 remote packet limit, so we'll transfer slightly fewer. */
8990 io_size = get_remote_packet_size ();
8991 buffer = xmalloc (io_size);
8992 make_cleanup (xfree, buffer);
8994 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
8996 bytes_in_buffer = 0;
8999 while (bytes_in_buffer || !saw_eof)
9003 bytes = fread (buffer + bytes_in_buffer, 1, io_size - bytes_in_buffer,
9008 error (_("Error reading %s."), local_file);
9011 /* EOF. Unless there is something still in the
9012 buffer from the last iteration, we are done. */
9014 if (bytes_in_buffer == 0)
9022 bytes += bytes_in_buffer;
9023 bytes_in_buffer = 0;
9025 retcode = remote_hostio_pwrite (fd, buffer, bytes, offset, &remote_errno);
9028 remote_hostio_error (remote_errno);
9029 else if (retcode == 0)
9030 error (_("Remote write of %d bytes returned 0!"), bytes);
9031 else if (retcode < bytes)
9033 /* Short write. Save the rest of the read data for the next
9035 bytes_in_buffer = bytes - retcode;
9036 memmove (buffer, buffer + retcode, bytes_in_buffer);
9042 discard_cleanups (close_cleanup);
9043 if (remote_hostio_close (fd, &remote_errno))
9044 remote_hostio_error (remote_errno);
9047 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
9048 do_cleanups (back_to);
9052 remote_file_get (const char *remote_file, const char *local_file, int from_tty)
9054 struct cleanup *back_to, *close_cleanup;
9055 int fd, remote_errno, bytes, io_size;
9061 error (_("command can only be used with remote target"));
9063 fd = remote_hostio_open (remote_file, FILEIO_O_RDONLY, 0, &remote_errno);
9065 remote_hostio_error (remote_errno);
9067 file = fopen (local_file, "wb");
9069 perror_with_name (local_file);
9070 back_to = make_cleanup_fclose (file);
9072 /* Send up to this many bytes at once. They won't all fit in the
9073 remote packet limit, so we'll transfer slightly fewer. */
9074 io_size = get_remote_packet_size ();
9075 buffer = xmalloc (io_size);
9076 make_cleanup (xfree, buffer);
9078 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
9083 bytes = remote_hostio_pread (fd, buffer, io_size, offset, &remote_errno);
9085 /* Success, but no bytes, means end-of-file. */
9088 remote_hostio_error (remote_errno);
9092 bytes = fwrite (buffer, 1, bytes, file);
9094 perror_with_name (local_file);
9097 discard_cleanups (close_cleanup);
9098 if (remote_hostio_close (fd, &remote_errno))
9099 remote_hostio_error (remote_errno);
9102 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
9103 do_cleanups (back_to);
9107 remote_file_delete (const char *remote_file, int from_tty)
9109 int retcode, remote_errno;
9112 error (_("command can only be used with remote target"));
9114 retcode = remote_hostio_unlink (remote_file, &remote_errno);
9116 remote_hostio_error (remote_errno);
9119 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
9123 remote_put_command (char *args, int from_tty)
9125 struct cleanup *back_to;
9129 error_no_arg (_("file to put"));
9131 argv = gdb_buildargv (args);
9132 back_to = make_cleanup_freeargv (argv);
9133 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
9134 error (_("Invalid parameters to remote put"));
9136 remote_file_put (argv[0], argv[1], from_tty);
9138 do_cleanups (back_to);
9142 remote_get_command (char *args, int from_tty)
9144 struct cleanup *back_to;
9148 error_no_arg (_("file to get"));
9150 argv = gdb_buildargv (args);
9151 back_to = make_cleanup_freeargv (argv);
9152 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
9153 error (_("Invalid parameters to remote get"));
9155 remote_file_get (argv[0], argv[1], from_tty);
9157 do_cleanups (back_to);
9161 remote_delete_command (char *args, int from_tty)
9163 struct cleanup *back_to;
9167 error_no_arg (_("file to delete"));
9169 argv = gdb_buildargv (args);
9170 back_to = make_cleanup_freeargv (argv);
9171 if (argv[0] == NULL || argv[1] != NULL)
9172 error (_("Invalid parameters to remote delete"));
9174 remote_file_delete (argv[0], from_tty);
9176 do_cleanups (back_to);
9180 remote_command (char *args, int from_tty)
9182 help_list (remote_cmdlist, "remote ", -1, gdb_stdout);
9186 remote_can_execute_reverse (void)
9188 if (remote_protocol_packets[PACKET_bs].support == PACKET_ENABLE
9189 || remote_protocol_packets[PACKET_bc].support == PACKET_ENABLE)
9196 remote_supports_non_stop (void)
9202 remote_supports_multi_process (void)
9204 struct remote_state *rs = get_remote_state ();
9205 return remote_multi_process_p (rs);
9209 remote_supports_cond_tracepoints (void)
9211 struct remote_state *rs = get_remote_state ();
9212 return rs->cond_tracepoints;
9216 remote_supports_fast_tracepoints (void)
9218 struct remote_state *rs = get_remote_state ();
9219 return rs->fast_tracepoints;
9223 remote_trace_init ()
9226 remote_get_noisy_reply (&target_buf, &target_buf_size);
9227 if (strcmp (target_buf, "OK"))
9228 error (_("Target does not support this command."));
9231 static void free_actions_list (char **actions_list);
9232 static void free_actions_list_cleanup_wrapper (void *);
9234 free_actions_list_cleanup_wrapper (void *al)
9236 free_actions_list (al);
9240 free_actions_list (char **actions_list)
9244 if (actions_list == 0)
9247 for (ndx = 0; actions_list[ndx]; ndx++)
9248 xfree (actions_list[ndx]);
9250 xfree (actions_list);
9254 remote_download_tracepoint (struct breakpoint *t)
9260 char **stepping_actions;
9262 struct cleanup *old_chain = NULL;
9263 struct agent_expr *aexpr;
9264 struct cleanup *aexpr_chain = NULL;
9267 encode_actions (t, &tdp_actions, &stepping_actions);
9268 old_chain = make_cleanup (free_actions_list_cleanup_wrapper,
9270 (void) make_cleanup (free_actions_list_cleanup_wrapper, stepping_actions);
9272 tpaddr = t->loc->address;
9273 sprintf_vma (tmp, (t->loc ? tpaddr : 0));
9274 sprintf (buf, "QTDP:%x:%s:%c:%lx:%x", t->number,
9276 (t->enable_state == bp_enabled ? 'E' : 'D'),
9277 t->step_count, t->pass_count);
9278 /* Fast tracepoints are mostly handled by the target, but we can
9279 tell the target how big of an instruction block should be moved
9281 if (t->type == bp_fast_tracepoint)
9283 /* Only test for support at download time; we may not know
9284 target capabilities at definition time. */
9285 if (remote_supports_fast_tracepoints ())
9289 if (gdbarch_fast_tracepoint_valid_at (target_gdbarch,
9290 tpaddr, &isize, NULL))
9291 sprintf (buf + strlen (buf), ":F%x", isize);
9293 /* If it passed validation at definition but fails now,
9294 something is very wrong. */
9295 internal_error (__FILE__, __LINE__,
9296 "Fast tracepoint not valid during download");
9299 /* Fast tracepoints are functionally identical to regular
9300 tracepoints, so don't take lack of support as a reason to
9301 give up on the trace run. */
9302 warning (_("Target does not support fast tracepoints, downloading %d as regular tracepoint"), t->number);
9304 /* If the tracepoint has a conditional, make it into an agent
9305 expression and append to the definition. */
9308 /* Only test support at download time, we may not know target
9309 capabilities at definition time. */
9310 if (remote_supports_cond_tracepoints ())
9312 aexpr = gen_eval_for_expr (t->loc->address, t->loc->cond);
9313 aexpr_chain = make_cleanup_free_agent_expr (aexpr);
9314 sprintf (buf + strlen (buf), ":X%x,", aexpr->len);
9315 pkt = buf + strlen (buf);
9316 for (ndx = 0; ndx < aexpr->len; ++ndx)
9317 pkt = pack_hex_byte (pkt, aexpr->buf[ndx]);
9319 do_cleanups (aexpr_chain);
9322 warning (_("Target does not support conditional tracepoints, ignoring tp %d cond"), t->number);
9325 if (t->actions || *default_collect)
9328 remote_get_noisy_reply (&target_buf, &target_buf_size);
9329 if (strcmp (target_buf, "OK"))
9330 error (_("Target does not support tracepoints."));
9332 if (!t->actions && !*default_collect)
9335 /* do_single_steps (t); */
9338 for (ndx = 0; tdp_actions[ndx]; ndx++)
9340 QUIT; /* allow user to bail out with ^C */
9341 sprintf (buf, "QTDP:-%x:%s:%s%c",
9342 t->number, tmp, /* address */
9344 ((tdp_actions[ndx + 1] || stepping_actions)
9347 remote_get_noisy_reply (&target_buf,
9349 if (strcmp (target_buf, "OK"))
9350 error (_("Error on target while setting tracepoints."));
9353 if (stepping_actions)
9355 for (ndx = 0; stepping_actions[ndx]; ndx++)
9357 QUIT; /* allow user to bail out with ^C */
9358 sprintf (buf, "QTDP:-%x:%s:%s%s%s",
9359 t->number, tmp, /* address */
9360 ((ndx == 0) ? "S" : ""),
9361 stepping_actions[ndx],
9362 (stepping_actions[ndx + 1] ? "-" : ""));
9364 remote_get_noisy_reply (&target_buf,
9366 if (strcmp (target_buf, "OK"))
9367 error (_("Error on target while setting tracepoints."));
9370 do_cleanups (old_chain);
9375 remote_download_trace_state_variable (struct trace_state_variable *tsv)
9377 struct remote_state *rs = get_remote_state ();
9380 sprintf (rs->buf, "QTDV:%x:%s:%x:",
9381 tsv->number, phex ((ULONGEST) tsv->initial_value, 8), tsv->builtin);
9382 p = rs->buf + strlen (rs->buf);
9383 if ((p - rs->buf) + strlen (tsv->name) * 2 >= get_remote_packet_size ())
9384 error (_("Trace state variable name too long for tsv definition packet"));
9385 p += 2 * bin2hex ((gdb_byte *) (tsv->name), p, 0);
9388 remote_get_noisy_reply (&target_buf, &target_buf_size);
9392 remote_trace_set_readonly_regions ()
9400 return; /* No information to give. */
9402 strcpy (target_buf, "QTro");
9403 for (s = exec_bfd->sections; s; s = s->next)
9405 char tmp1[40], tmp2[40];
9407 if ((s->flags & SEC_LOAD) == 0 ||
9408 /* (s->flags & SEC_CODE) == 0 || */
9409 (s->flags & SEC_READONLY) == 0)
9414 size = bfd_get_section_size (s);
9415 sprintf_vma (tmp1, lma);
9416 sprintf_vma (tmp2, lma + size);
9417 sprintf (target_buf + strlen (target_buf),
9418 ":%s,%s", tmp1, tmp2);
9422 putpkt (target_buf);
9423 getpkt (&target_buf, &target_buf_size, 0);
9428 remote_trace_start ()
9431 remote_get_noisy_reply (&target_buf, &target_buf_size);
9432 if (strcmp (target_buf, "OK"))
9433 error (_("Bogus reply from target: %s"), target_buf);
9437 remote_get_trace_status (struct trace_status *ts)
9439 char *p, *p1, *p_temp;
9441 /* FIXME we need to get register block size some other way */
9442 extern int trace_regblock_size;
9443 trace_regblock_size = get_remote_arch_state ()->sizeof_g_packet;
9445 putpkt ("qTStatus");
9446 getpkt (&target_buf, &target_buf_size, 0);
9447 /* FIXME should handle more variety of replies */
9451 /* If the remote target doesn't do tracing, flag it. */
9455 /* We're working with a live target. */
9458 /* Set some defaults. */
9459 ts->running_known = 0;
9460 ts->stop_reason = trace_stop_reason_unknown;
9461 ts->traceframe_count = -1;
9462 ts->buffer_free = 0;
9465 error (_("Bogus trace status reply from target: %s"), target_buf);
9467 parse_trace_status (p, ts);
9473 remote_trace_stop ()
9476 remote_get_noisy_reply (&target_buf, &target_buf_size);
9477 if (strcmp (target_buf, "OK"))
9478 error (_("Bogus reply from target: %s"), target_buf);
9482 remote_trace_find (enum trace_find_type type, int num,
9483 ULONGEST addr1, ULONGEST addr2,
9486 struct remote_state *rs = get_remote_state ();
9488 int target_frameno = -1, target_tracept = -1;
9491 strcpy (p, "QTFrame:");
9492 p = strchr (p, '\0');
9496 sprintf (p, "%x", num);
9499 sprintf (p, "pc:%s", phex_nz (addr1, 0));
9502 sprintf (p, "tdp:%x", num);
9505 sprintf (p, "range:%s:%s", phex_nz (addr1, 0), phex_nz (addr2, 0));
9508 sprintf (p, "outside:%s:%s", phex_nz (addr1, 0), phex_nz (addr2, 0));
9511 error ("Unknown trace find type %d", type);
9515 reply = remote_get_noisy_reply (&(rs->buf), &sizeof_pkt);
9517 while (reply && *reply)
9521 if ((target_frameno = (int) strtol (++reply, &reply, 16)) == -1)
9522 error (_("Target failed to find requested trace frame."));
9525 if ((target_tracept = (int) strtol (++reply, &reply, 16)) == -1)
9526 error (_("Target failed to find requested trace frame."));
9528 case 'O': /* "OK"? */
9529 if (reply[1] == 'K' && reply[2] == '\0')
9532 error (_("Bogus reply from target: %s"), reply);
9535 error (_("Bogus reply from target: %s"), reply);
9538 *tpp = target_tracept;
9539 return target_frameno;
9543 remote_get_trace_state_variable_value (int tsvnum, LONGEST *val)
9545 struct remote_state *rs = get_remote_state ();
9549 sprintf (rs->buf, "qTV:%x", tsvnum);
9551 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
9552 if (reply && *reply)
9556 unpack_varlen_hex (reply + 1, &uval);
9557 *val = (LONGEST) uval;
9565 remote_save_trace_data (char *filename)
9567 struct remote_state *rs = get_remote_state ();
9571 strcpy (p, "QTSave:");
9573 if ((p - rs->buf) + strlen (filename) * 2 >= get_remote_packet_size ())
9574 error (_("Remote file name too long for trace save packet"));
9575 p += 2 * bin2hex ((gdb_byte *) filename, p, 0);
9578 remote_get_noisy_reply (&target_buf, &target_buf_size);
9582 /* This is basically a memory transfer, but needs to be its own packet
9583 because we don't know how the target actually organizes its trace
9584 memory, plus we want to be able to ask for as much as possible, but
9585 not be unhappy if we don't get as much as we ask for. */
9588 remote_get_raw_trace_data (gdb_byte *buf, ULONGEST offset, LONGEST len)
9590 struct remote_state *rs = get_remote_state ();
9596 strcpy (p, "qTBuffer:");
9598 p += hexnumstr (p, offset);
9600 p += hexnumstr (p, len);
9604 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
9605 if (reply && *reply)
9607 /* 'l' by itself means we're at the end of the buffer and
9608 there is nothing more to get. */
9612 /* Convert the reply into binary. Limit the number of bytes to
9613 convert according to our passed-in buffer size, rather than
9614 what was returned in the packet; if the target is
9615 unexpectedly generous and gives us a bigger reply than we
9616 asked for, we don't want to crash. */
9617 rslt = hex2bin (target_buf, buf, len);
9621 /* Something went wrong, flag as an error. */
9626 remote_set_disconnected_tracing (int val)
9628 struct remote_state *rs = get_remote_state ();
9630 sprintf (rs->buf, "QTDisconnected:%x", val);
9632 remote_get_noisy_reply (&target_buf, &target_buf_size);
9633 if (strcmp (target_buf, "OK"))
9634 error (_("Target does not support this command."));
9638 remote_core_of_thread (struct target_ops *ops, ptid_t ptid)
9640 struct thread_info *info = find_thread_ptid (ptid);
9641 if (info && info->private)
9642 return info->private->core;
9647 init_remote_ops (void)
9649 remote_ops.to_shortname = "remote";
9650 remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
9652 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
9653 Specify the serial device it is connected to\n\
9654 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
9655 remote_ops.to_open = remote_open;
9656 remote_ops.to_close = remote_close;
9657 remote_ops.to_detach = remote_detach;
9658 remote_ops.to_disconnect = remote_disconnect;
9659 remote_ops.to_resume = remote_resume;
9660 remote_ops.to_wait = remote_wait;
9661 remote_ops.to_fetch_registers = remote_fetch_registers;
9662 remote_ops.to_store_registers = remote_store_registers;
9663 remote_ops.to_prepare_to_store = remote_prepare_to_store;
9664 remote_ops.deprecated_xfer_memory = remote_xfer_memory;
9665 remote_ops.to_files_info = remote_files_info;
9666 remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
9667 remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
9668 remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
9669 remote_ops.to_stopped_data_address = remote_stopped_data_address;
9670 remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
9671 remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
9672 remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
9673 remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
9674 remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
9675 remote_ops.to_kill = remote_kill;
9676 remote_ops.to_load = generic_load;
9677 remote_ops.to_mourn_inferior = remote_mourn;
9678 remote_ops.to_thread_alive = remote_thread_alive;
9679 remote_ops.to_find_new_threads = remote_threads_info;
9680 remote_ops.to_pid_to_str = remote_pid_to_str;
9681 remote_ops.to_extra_thread_info = remote_threads_extra_info;
9682 remote_ops.to_stop = remote_stop;
9683 remote_ops.to_xfer_partial = remote_xfer_partial;
9684 remote_ops.to_rcmd = remote_rcmd;
9685 remote_ops.to_log_command = serial_log_command;
9686 remote_ops.to_get_thread_local_address = remote_get_thread_local_address;
9687 remote_ops.to_stratum = process_stratum;
9688 remote_ops.to_has_all_memory = default_child_has_all_memory;
9689 remote_ops.to_has_memory = default_child_has_memory;
9690 remote_ops.to_has_stack = default_child_has_stack;
9691 remote_ops.to_has_registers = default_child_has_registers;
9692 remote_ops.to_has_execution = default_child_has_execution;
9693 remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
9694 remote_ops.to_can_execute_reverse = remote_can_execute_reverse;
9695 remote_ops.to_magic = OPS_MAGIC;
9696 remote_ops.to_memory_map = remote_memory_map;
9697 remote_ops.to_flash_erase = remote_flash_erase;
9698 remote_ops.to_flash_done = remote_flash_done;
9699 remote_ops.to_read_description = remote_read_description;
9700 remote_ops.to_search_memory = remote_search_memory;
9701 remote_ops.to_can_async_p = remote_can_async_p;
9702 remote_ops.to_is_async_p = remote_is_async_p;
9703 remote_ops.to_async = remote_async;
9704 remote_ops.to_async_mask = remote_async_mask;
9705 remote_ops.to_terminal_inferior = remote_terminal_inferior;
9706 remote_ops.to_terminal_ours = remote_terminal_ours;
9707 remote_ops.to_supports_non_stop = remote_supports_non_stop;
9708 remote_ops.to_supports_multi_process = remote_supports_multi_process;
9709 remote_ops.to_trace_init = remote_trace_init;
9710 remote_ops.to_download_tracepoint = remote_download_tracepoint;
9711 remote_ops.to_download_trace_state_variable = remote_download_trace_state_variable;
9712 remote_ops.to_trace_set_readonly_regions = remote_trace_set_readonly_regions;
9713 remote_ops.to_trace_start = remote_trace_start;
9714 remote_ops.to_get_trace_status = remote_get_trace_status;
9715 remote_ops.to_trace_stop = remote_trace_stop;
9716 remote_ops.to_trace_find = remote_trace_find;
9717 remote_ops.to_get_trace_state_variable_value = remote_get_trace_state_variable_value;
9718 remote_ops.to_save_trace_data = remote_save_trace_data;
9719 remote_ops.to_upload_tracepoints = remote_upload_tracepoints;
9720 remote_ops.to_upload_trace_state_variables = remote_upload_trace_state_variables;
9721 remote_ops.to_get_raw_trace_data = remote_get_raw_trace_data;
9722 remote_ops.to_set_disconnected_tracing = remote_set_disconnected_tracing;
9723 remote_ops.to_core_of_thread = remote_core_of_thread;
9726 /* Set up the extended remote vector by making a copy of the standard
9727 remote vector and adding to it. */
9730 init_extended_remote_ops (void)
9732 extended_remote_ops = remote_ops;
9734 extended_remote_ops.to_shortname = "extended-remote";
9735 extended_remote_ops.to_longname =
9736 "Extended remote serial target in gdb-specific protocol";
9737 extended_remote_ops.to_doc =
9738 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
9739 Specify the serial device it is connected to (e.g. /dev/ttya).";
9740 extended_remote_ops.to_open = extended_remote_open;
9741 extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
9742 extended_remote_ops.to_mourn_inferior = extended_remote_mourn;
9743 extended_remote_ops.to_detach = extended_remote_detach;
9744 extended_remote_ops.to_attach = extended_remote_attach;
9745 extended_remote_ops.to_kill = extended_remote_kill;
9749 remote_can_async_p (void)
9751 if (!target_async_permitted)
9752 /* We only enable async when the user specifically asks for it. */
9755 /* We're async whenever the serial device is. */
9756 return remote_async_mask_value && serial_can_async_p (remote_desc);
9760 remote_is_async_p (void)
9762 if (!target_async_permitted)
9763 /* We only enable async when the user specifically asks for it. */
9766 /* We're async whenever the serial device is. */
9767 return remote_async_mask_value && serial_is_async_p (remote_desc);
9770 /* Pass the SERIAL event on and up to the client. One day this code
9771 will be able to delay notifying the client of an event until the
9772 point where an entire packet has been received. */
9774 static void (*async_client_callback) (enum inferior_event_type event_type,
9776 static void *async_client_context;
9777 static serial_event_ftype remote_async_serial_handler;
9780 remote_async_serial_handler (struct serial *scb, void *context)
9782 /* Don't propogate error information up to the client. Instead let
9783 the client find out about the error by querying the target. */
9784 async_client_callback (INF_REG_EVENT, async_client_context);
9788 remote_async_inferior_event_handler (gdb_client_data data)
9790 inferior_event_handler (INF_REG_EVENT, NULL);
9794 remote_async_get_pending_events_handler (gdb_client_data data)
9796 remote_get_pending_stop_replies ();
9800 remote_async (void (*callback) (enum inferior_event_type event_type,
9801 void *context), void *context)
9803 if (remote_async_mask_value == 0)
9804 internal_error (__FILE__, __LINE__,
9805 _("Calling remote_async when async is masked"));
9807 if (callback != NULL)
9809 serial_async (remote_desc, remote_async_serial_handler, NULL);
9810 async_client_callback = callback;
9811 async_client_context = context;
9814 serial_async (remote_desc, NULL, NULL);
9818 remote_async_mask (int new_mask)
9820 int curr_mask = remote_async_mask_value;
9821 remote_async_mask_value = new_mask;
9826 set_remote_cmd (char *args, int from_tty)
9828 help_list (remote_set_cmdlist, "set remote ", -1, gdb_stdout);
9832 show_remote_cmd (char *args, int from_tty)
9834 /* We can't just use cmd_show_list here, because we want to skip
9835 the redundant "show remote Z-packet" and the legacy aliases. */
9836 struct cleanup *showlist_chain;
9837 struct cmd_list_element *list = remote_show_cmdlist;
9839 showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist");
9840 for (; list != NULL; list = list->next)
9841 if (strcmp (list->name, "Z-packet") == 0)
9843 else if (list->type == not_set_cmd)
9844 /* Alias commands are exactly like the original, except they
9845 don't have the normal type. */
9849 struct cleanup *option_chain
9850 = make_cleanup_ui_out_tuple_begin_end (uiout, "option");
9851 ui_out_field_string (uiout, "name", list->name);
9852 ui_out_text (uiout, ": ");
9853 if (list->type == show_cmd)
9854 do_setshow_command ((char *) NULL, from_tty, list);
9856 cmd_func (list, NULL, from_tty);
9857 /* Close the tuple. */
9858 do_cleanups (option_chain);
9861 /* Close the tuple. */
9862 do_cleanups (showlist_chain);
9866 /* Function to be called whenever a new objfile (shlib) is detected. */
9868 remote_new_objfile (struct objfile *objfile)
9870 if (remote_desc != 0) /* Have a remote connection. */
9871 remote_check_symbols (objfile);
9874 /* Pull all the tracepoints defined on the target and create local
9875 data structures representing them. We don't want to create real
9876 tracepoints yet, we don't want to mess up the user's existing
9880 remote_upload_tracepoints (struct uploaded_tp **utpp)
9882 struct remote_state *rs = get_remote_state ();
9885 /* Ask for a first packet of tracepoint definition. */
9887 getpkt (&rs->buf, &rs->buf_size, 0);
9889 while (*p && *p != 'l')
9891 parse_tracepoint_definition (p, utpp);
9892 /* Ask for another packet of tracepoint definition. */
9894 getpkt (&rs->buf, &rs->buf_size, 0);
9901 remote_upload_trace_state_variables (struct uploaded_tsv **utsvp)
9903 struct remote_state *rs = get_remote_state ();
9906 /* Ask for a first packet of variable definition. */
9908 getpkt (&rs->buf, &rs->buf_size, 0);
9910 while (*p && *p != 'l')
9912 parse_tsv_definition (p, utsvp);
9913 /* Ask for another packet of variable definition. */
9915 getpkt (&rs->buf, &rs->buf_size, 0);
9922 _initialize_remote (void)
9924 struct remote_state *rs;
9925 struct cmd_list_element *cmd;
9928 /* architecture specific data */
9929 remote_gdbarch_data_handle =
9930 gdbarch_data_register_post_init (init_remote_state);
9931 remote_g_packet_data_handle =
9932 gdbarch_data_register_pre_init (remote_g_packet_data_init);
9934 /* Initialize the per-target state. At the moment there is only one
9935 of these, not one per target. Only one target is active at a
9936 time. The default buffer size is unimportant; it will be expanded
9937 whenever a larger buffer is needed. */
9938 rs = get_remote_state_raw ();
9940 rs->buf = xmalloc (rs->buf_size);
9943 add_target (&remote_ops);
9945 init_extended_remote_ops ();
9946 add_target (&extended_remote_ops);
9948 /* Hook into new objfile notification. */
9949 observer_attach_new_objfile (remote_new_objfile);
9951 /* Set up signal handlers. */
9952 sigint_remote_token =
9953 create_async_signal_handler (async_remote_interrupt, NULL);
9954 sigint_remote_twice_token =
9955 create_async_signal_handler (inferior_event_handler_wrapper, NULL);
9958 init_remote_threadtests ();
9961 /* set/show remote ... */
9963 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
9964 Remote protocol specific variables\n\
9965 Configure various remote-protocol specific variables such as\n\
9966 the packets being used"),
9967 &remote_set_cmdlist, "set remote ",
9968 0 /* allow-unknown */, &setlist);
9969 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
9970 Remote protocol specific variables\n\
9971 Configure various remote-protocol specific variables such as\n\
9972 the packets being used"),
9973 &remote_show_cmdlist, "show remote ",
9974 0 /* allow-unknown */, &showlist);
9976 add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
9977 Compare section data on target to the exec file.\n\
9978 Argument is a single section name (default: all loaded sections)."),
9981 add_cmd ("packet", class_maintenance, packet_command, _("\
9982 Send an arbitrary packet to a remote target.\n\
9983 maintenance packet TEXT\n\
9984 If GDB is talking to an inferior via the GDB serial protocol, then\n\
9985 this command sends the string TEXT to the inferior, and displays the\n\
9986 response packet. GDB supplies the initial `$' character, and the\n\
9987 terminating `#' character and checksum."),
9990 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
9991 Set whether to send break if interrupted."), _("\
9992 Show whether to send break if interrupted."), _("\
9993 If set, a break, instead of a cntrl-c, is sent to the remote target."),
9994 set_remotebreak, show_remotebreak,
9995 &setlist, &showlist);
9996 cmd_name = "remotebreak";
9997 cmd = lookup_cmd (&cmd_name, setlist, "", -1, 1);
9998 deprecate_cmd (cmd, "set remote interrupt-sequence");
9999 cmd_name = "remotebreak"; /* needed because lookup_cmd updates the pointer */
10000 cmd = lookup_cmd (&cmd_name, showlist, "", -1, 1);
10001 deprecate_cmd (cmd, "show remote interrupt-sequence");
10003 add_setshow_enum_cmd ("interrupt-sequence", class_support,
10004 interrupt_sequence_modes, &interrupt_sequence_mode, _("\
10005 Set interrupt sequence to remote target."), _("\
10006 Show interrupt sequence to remote target."), _("\
10007 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
10008 NULL, show_interrupt_sequence,
10009 &remote_set_cmdlist,
10010 &remote_show_cmdlist);
10012 add_setshow_boolean_cmd ("interrupt-on-connect", class_support,
10013 &interrupt_on_connect, _("\
10014 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
10015 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
10016 If set, interrupt sequence is sent to remote target."),
10018 &remote_set_cmdlist, &remote_show_cmdlist);
10020 /* Install commands for configuring memory read/write packets. */
10022 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
10023 Set the maximum number of bytes per memory write packet (deprecated)."),
10025 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
10026 Show the maximum number of bytes per memory write packet (deprecated)."),
10028 add_cmd ("memory-write-packet-size", no_class,
10029 set_memory_write_packet_size, _("\
10030 Set the maximum number of bytes per memory-write packet.\n\
10031 Specify the number of bytes in a packet or 0 (zero) for the\n\
10032 default packet size. The actual limit is further reduced\n\
10033 dependent on the target. Specify ``fixed'' to disable the\n\
10034 further restriction and ``limit'' to enable that restriction."),
10035 &remote_set_cmdlist);
10036 add_cmd ("memory-read-packet-size", no_class,
10037 set_memory_read_packet_size, _("\
10038 Set the maximum number of bytes per memory-read packet.\n\
10039 Specify the number of bytes in a packet or 0 (zero) for the\n\
10040 default packet size. The actual limit is further reduced\n\
10041 dependent on the target. Specify ``fixed'' to disable the\n\
10042 further restriction and ``limit'' to enable that restriction."),
10043 &remote_set_cmdlist);
10044 add_cmd ("memory-write-packet-size", no_class,
10045 show_memory_write_packet_size,
10046 _("Show the maximum number of bytes per memory-write packet."),
10047 &remote_show_cmdlist);
10048 add_cmd ("memory-read-packet-size", no_class,
10049 show_memory_read_packet_size,
10050 _("Show the maximum number of bytes per memory-read packet."),
10051 &remote_show_cmdlist);
10053 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class,
10054 &remote_hw_watchpoint_limit, _("\
10055 Set the maximum number of target hardware watchpoints."), _("\
10056 Show the maximum number of target hardware watchpoints."), _("\
10057 Specify a negative limit for unlimited."),
10058 NULL, NULL, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
10059 &remote_set_cmdlist, &remote_show_cmdlist);
10060 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class,
10061 &remote_hw_breakpoint_limit, _("\
10062 Set the maximum number of target hardware breakpoints."), _("\
10063 Show the maximum number of target hardware breakpoints."), _("\
10064 Specify a negative limit for unlimited."),
10065 NULL, NULL, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
10066 &remote_set_cmdlist, &remote_show_cmdlist);
10068 add_setshow_integer_cmd ("remoteaddresssize", class_obscure,
10069 &remote_address_size, _("\
10070 Set the maximum size of the address (in bits) in a memory packet."), _("\
10071 Show the maximum size of the address (in bits) in a memory packet."), NULL,
10073 NULL, /* FIXME: i18n: */
10074 &setlist, &showlist);
10076 add_packet_config_cmd (&remote_protocol_packets[PACKET_X],
10077 "X", "binary-download", 1);
10079 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont],
10080 "vCont", "verbose-resume", 0);
10082 add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals],
10083 "QPassSignals", "pass-signals", 0);
10085 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol],
10086 "qSymbol", "symbol-lookup", 0);
10088 add_packet_config_cmd (&remote_protocol_packets[PACKET_P],
10089 "P", "set-register", 1);
10091 add_packet_config_cmd (&remote_protocol_packets[PACKET_p],
10092 "p", "fetch-register", 1);
10094 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0],
10095 "Z0", "software-breakpoint", 0);
10097 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1],
10098 "Z1", "hardware-breakpoint", 0);
10100 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2],
10101 "Z2", "write-watchpoint", 0);
10103 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3],
10104 "Z3", "read-watchpoint", 0);
10106 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4],
10107 "Z4", "access-watchpoint", 0);
10109 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv],
10110 "qXfer:auxv:read", "read-aux-vector", 0);
10112 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features],
10113 "qXfer:features:read", "target-features", 0);
10115 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries],
10116 "qXfer:libraries:read", "library-info", 0);
10118 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map],
10119 "qXfer:memory-map:read", "memory-map", 0);
10121 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read],
10122 "qXfer:spu:read", "read-spu-object", 0);
10124 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write],
10125 "qXfer:spu:write", "write-spu-object", 0);
10127 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata],
10128 "qXfer:osdata:read", "osdata", 0);
10130 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_threads],
10131 "qXfer:threads:read", "threads", 0);
10133 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read],
10134 "qXfer:siginfo:read", "read-siginfo-object", 0);
10136 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write],
10137 "qXfer:siginfo:write", "write-siginfo-object", 0);
10139 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
10140 "qGetTLSAddr", "get-thread-local-storage-address",
10143 add_packet_config_cmd (&remote_protocol_packets[PACKET_bc],
10144 "bc", "reverse-continue", 0);
10146 add_packet_config_cmd (&remote_protocol_packets[PACKET_bs],
10147 "bs", "reverse-step", 0);
10149 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported],
10150 "qSupported", "supported-packets", 0);
10152 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory],
10153 "qSearch:memory", "search-memory", 0);
10155 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open],
10156 "vFile:open", "hostio-open", 0);
10158 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread],
10159 "vFile:pread", "hostio-pread", 0);
10161 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite],
10162 "vFile:pwrite", "hostio-pwrite", 0);
10164 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close],
10165 "vFile:close", "hostio-close", 0);
10167 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink],
10168 "vFile:unlink", "hostio-unlink", 0);
10170 add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach],
10171 "vAttach", "attach", 0);
10173 add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
10176 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode],
10177 "QStartNoAckMode", "noack", 0);
10179 add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill],
10180 "vKill", "kill", 0);
10182 add_packet_config_cmd (&remote_protocol_packets[PACKET_qAttached],
10183 "qAttached", "query-attached", 0);
10185 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalTracepoints],
10186 "ConditionalTracepoints", "conditional-tracepoints", 0);
10187 add_packet_config_cmd (&remote_protocol_packets[PACKET_FastTracepoints],
10188 "FastTracepoints", "fast-tracepoints", 0);
10190 /* Keep the old ``set remote Z-packet ...'' working. Each individual
10191 Z sub-packet has its own set and show commands, but users may
10192 have sets to this variable in their .gdbinit files (or in their
10194 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
10195 &remote_Z_packet_detect, _("\
10196 Set use of remote protocol `Z' packets"), _("\
10197 Show use of remote protocol `Z' packets "), _("\
10198 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
10200 set_remote_protocol_Z_packet_cmd,
10201 show_remote_protocol_Z_packet_cmd, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
10202 &remote_set_cmdlist, &remote_show_cmdlist);
10204 add_prefix_cmd ("remote", class_files, remote_command, _("\
10205 Manipulate files on the remote system\n\
10206 Transfer files to and from the remote target system."),
10207 &remote_cmdlist, "remote ",
10208 0 /* allow-unknown */, &cmdlist);
10210 add_cmd ("put", class_files, remote_put_command,
10211 _("Copy a local file to the remote system."),
10214 add_cmd ("get", class_files, remote_get_command,
10215 _("Copy a remote file to the local system."),
10218 add_cmd ("delete", class_files, remote_delete_command,
10219 _("Delete a remote file."),
10222 remote_exec_file = xstrdup ("");
10223 add_setshow_string_noescape_cmd ("exec-file", class_files,
10224 &remote_exec_file, _("\
10225 Set the remote pathname for \"run\""), _("\
10226 Show the remote pathname for \"run\""), NULL, NULL, NULL,
10227 &remote_set_cmdlist, &remote_show_cmdlist);
10229 /* Eventually initialize fileio. See fileio.c */
10230 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
10232 /* Take advantage of the fact that the LWP field is not used, to tag
10233 special ptids with it set to != 0. */
10234 magic_null_ptid = ptid_build (42000, 1, -1);
10235 not_sent_ptid = ptid_build (42000, 1, -2);
10236 any_thread_ptid = ptid_build (42000, 1, 0);
10238 target_buf_size = 2048;
10239 target_buf = xmalloc (target_buf_size);