1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
4 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
5 2010 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 /* See the GDB User Guide for details of the GDB remote protocol. */
25 #include "gdb_string.h"
31 #include "exceptions.h"
33 /*#include "terminal.h" */
36 #include "gdb-stabs.h"
37 #include "gdbthread.h"
41 #include "gdb_assert.h"
44 #include "cli/cli-decode.h"
45 #include "cli/cli-setshow.h"
46 #include "target-descriptions.h"
51 #include "event-loop.h"
52 #include "event-top.h"
58 #include "gdbcore.h" /* for exec_bfd */
60 #include "remote-fileio.h"
61 #include "gdb/fileio.h"
63 #include "xml-support.h"
65 #include "memory-map.h"
67 #include "tracepoint.h"
71 /* temp hacks for tracepoint encoding migration */
72 static char *target_buf;
73 static long target_buf_size;
75 encode_actions (struct breakpoint *t, struct bp_location *tloc,
76 char ***tdp_actions, char ***stepping_actions);
78 /* The size to align memory write packets, when practical. The protocol
79 does not guarantee any alignment, and gdb will generate short
80 writes and unaligned writes, but even as a best-effort attempt this
81 can improve bulk transfers. For instance, if a write is misaligned
82 relative to the target's data bus, the stub may need to make an extra
83 round trip fetching data from the target. This doesn't make a
84 huge difference, but it's easy to do, so we try to be helpful.
86 The alignment chosen is arbitrary; usually data bus width is
87 important here, not the possibly larger cache line size. */
88 enum { REMOTE_ALIGN_WRITES = 16 };
90 /* Prototypes for local functions. */
91 static void cleanup_sigint_signal_handler (void *dummy);
92 static void initialize_sigint_signal_handler (void);
93 static int getpkt_sane (char **buf, long *sizeof_buf, int forever);
94 static int getpkt_or_notif_sane (char **buf, long *sizeof_buf,
97 static void handle_remote_sigint (int);
98 static void handle_remote_sigint_twice (int);
99 static void async_remote_interrupt (gdb_client_data);
100 void async_remote_interrupt_twice (gdb_client_data);
102 static void remote_files_info (struct target_ops *ignore);
104 static void remote_prepare_to_store (struct regcache *regcache);
106 static void remote_open (char *name, int from_tty);
108 static void extended_remote_open (char *name, int from_tty);
110 static void remote_open_1 (char *, int, struct target_ops *, int extended_p);
112 static void remote_close (int quitting);
114 static void remote_mourn (struct target_ops *ops);
116 static void extended_remote_restart (void);
118 static void extended_remote_mourn (struct target_ops *);
120 static void remote_mourn_1 (struct target_ops *);
122 static void remote_send (char **buf, long *sizeof_buf_p);
124 static int readchar (int timeout);
126 static void remote_kill (struct target_ops *ops);
128 static int tohex (int nib);
130 static int remote_can_async_p (void);
132 static int remote_is_async_p (void);
134 static void remote_async (void (*callback) (enum inferior_event_type event_type,
135 void *context), void *context);
137 static int remote_async_mask (int new_mask);
139 static void remote_detach (struct target_ops *ops, char *args, int from_tty);
141 static void remote_interrupt (int signo);
143 static void remote_interrupt_twice (int signo);
145 static void interrupt_query (void);
147 static void set_general_thread (struct ptid ptid);
148 static void set_continue_thread (struct ptid ptid);
150 static void get_offsets (void);
152 static void skip_frame (void);
154 static long read_frame (char **buf_p, long *sizeof_buf);
156 static int hexnumlen (ULONGEST num);
158 static void init_remote_ops (void);
160 static void init_extended_remote_ops (void);
162 static void remote_stop (ptid_t);
164 static int ishex (int ch, int *val);
166 static int stubhex (int ch);
168 static int hexnumstr (char *, ULONGEST);
170 static int hexnumnstr (char *, ULONGEST, int);
172 static CORE_ADDR remote_address_masked (CORE_ADDR);
174 static void print_packet (char *);
176 static void compare_sections_command (char *, int);
178 static void packet_command (char *, int);
180 static int stub_unpack_int (char *buff, int fieldlength);
182 static ptid_t remote_current_thread (ptid_t oldptid);
184 static void remote_find_new_threads (void);
186 static void record_currthread (ptid_t currthread);
188 static int fromhex (int a);
190 extern int hex2bin (const char *hex, gdb_byte *bin, int count);
192 extern int bin2hex (const gdb_byte *bin, char *hex, int count);
194 static int putpkt_binary (char *buf, int cnt);
196 static void check_binary_download (CORE_ADDR addr);
198 struct packet_config;
200 static void show_packet_config_cmd (struct packet_config *config);
202 static void update_packet_config (struct packet_config *config);
204 static void set_remote_protocol_packet_cmd (char *args, int from_tty,
205 struct cmd_list_element *c);
207 static void show_remote_protocol_packet_cmd (struct ui_file *file,
209 struct cmd_list_element *c,
212 static char *write_ptid (char *buf, const char *endbuf, ptid_t ptid);
213 static ptid_t read_ptid (char *buf, char **obuf);
216 static int remote_get_trace_status (struct trace_status *ts);
218 static int remote_upload_tracepoints (struct uploaded_tp **utpp);
220 static int remote_upload_trace_state_variables (struct uploaded_tsv **utsvp);
222 static void remote_query_supported (void);
224 static void remote_check_symbols (struct objfile *objfile);
226 void _initialize_remote (void);
229 static struct stop_reply *stop_reply_xmalloc (void);
230 static void stop_reply_xfree (struct stop_reply *);
231 static void do_stop_reply_xfree (void *arg);
232 static void remote_parse_stop_reply (char *buf, struct stop_reply *);
233 static void push_stop_reply (struct stop_reply *);
234 static void remote_get_pending_stop_replies (void);
235 static void discard_pending_stop_replies (int pid);
236 static int peek_stop_reply (ptid_t ptid);
238 static void remote_async_inferior_event_handler (gdb_client_data);
239 static void remote_async_get_pending_events_handler (gdb_client_data);
241 static void remote_terminal_ours (void);
243 static int remote_read_description_p (struct target_ops *target);
245 static void remote_console_output (char *msg);
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. */
433 QUIT; /* allow user to bail out with ^C */
434 getpkt (buf_p, sizeof_buf, 0);
438 else if (strncmp (buf, "qRelocInsn:", strlen ("qRelocInsn:")) == 0)
441 CORE_ADDR from, to, org_to;
443 int adjusted_size = 0;
444 volatile struct gdb_exception ex;
446 p = buf + strlen ("qRelocInsn:");
447 pp = unpack_varlen_hex (p, &ul);
449 error (_("invalid qRelocInsn packet: %s\n"), buf);
453 pp = unpack_varlen_hex (p, &ul);
458 TRY_CATCH (ex, RETURN_MASK_ALL)
460 gdbarch_relocate_instruction (target_gdbarch, &to, from);
464 adjusted_size = to - org_to;
466 sprintf (buf, "qRelocInsn:%x", adjusted_size);
469 else if (ex.reason < 0 && ex.error == MEMORY_ERROR)
471 /* Propagate memory errors silently back to the target.
472 The stub may have limited the range of addresses we
473 can write to, for example. */
478 /* Something unexpectedly bad happened. Be verbose so
479 we can tell what, and propagate the error back to the
480 stub, so it doesn't get stuck waiting for a
482 exception_fprintf (gdb_stderr, ex,
483 _("warning: relocating instruction: "));
487 else if (buf[0] == 'O' && buf[1] != 'K')
488 remote_console_output (buf + 1); /* 'O' message from stub */
490 return buf; /* here's the actual reply */
495 /* Handle for retreving the remote protocol data from gdbarch. */
496 static struct gdbarch_data *remote_gdbarch_data_handle;
498 static struct remote_arch_state *
499 get_remote_arch_state (void)
501 return gdbarch_data (target_gdbarch, remote_gdbarch_data_handle);
504 /* Fetch the global remote target state. */
506 static struct remote_state *
507 get_remote_state (void)
509 /* Make sure that the remote architecture state has been
510 initialized, because doing so might reallocate rs->buf. Any
511 function which calls getpkt also needs to be mindful of changes
512 to rs->buf, but this call limits the number of places which run
514 get_remote_arch_state ();
516 return get_remote_state_raw ();
520 compare_pnums (const void *lhs_, const void *rhs_)
522 const struct packet_reg * const *lhs = lhs_;
523 const struct packet_reg * const *rhs = rhs_;
525 if ((*lhs)->pnum < (*rhs)->pnum)
527 else if ((*lhs)->pnum == (*rhs)->pnum)
534 init_remote_state (struct gdbarch *gdbarch)
536 int regnum, num_remote_regs, offset;
537 struct remote_state *rs = get_remote_state_raw ();
538 struct remote_arch_state *rsa;
539 struct packet_reg **remote_regs;
541 rsa = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_arch_state);
543 /* Use the architecture to build a regnum<->pnum table, which will be
544 1:1 unless a feature set specifies otherwise. */
545 rsa->regs = GDBARCH_OBSTACK_CALLOC (gdbarch,
546 gdbarch_num_regs (gdbarch),
548 for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++)
550 struct packet_reg *r = &rsa->regs[regnum];
552 if (register_size (gdbarch, regnum) == 0)
553 /* Do not try to fetch zero-sized (placeholder) registers. */
556 r->pnum = gdbarch_remote_register_number (gdbarch, regnum);
561 /* Define the g/G packet format as the contents of each register
562 with a remote protocol number, in order of ascending protocol
565 remote_regs = alloca (gdbarch_num_regs (gdbarch)
566 * sizeof (struct packet_reg *));
567 for (num_remote_regs = 0, regnum = 0;
568 regnum < gdbarch_num_regs (gdbarch);
570 if (rsa->regs[regnum].pnum != -1)
571 remote_regs[num_remote_regs++] = &rsa->regs[regnum];
573 qsort (remote_regs, num_remote_regs, sizeof (struct packet_reg *),
576 for (regnum = 0, offset = 0; regnum < num_remote_regs; regnum++)
578 remote_regs[regnum]->in_g_packet = 1;
579 remote_regs[regnum]->offset = offset;
580 offset += register_size (gdbarch, remote_regs[regnum]->regnum);
583 /* Record the maximum possible size of the g packet - it may turn out
585 rsa->sizeof_g_packet = offset;
587 /* Default maximum number of characters in a packet body. Many
588 remote stubs have a hardwired buffer size of 400 bytes
589 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
590 as the maximum packet-size to ensure that the packet and an extra
591 NUL character can always fit in the buffer. This stops GDB
592 trashing stubs that try to squeeze an extra NUL into what is
593 already a full buffer (As of 1999-12-04 that was most stubs). */
594 rsa->remote_packet_size = 400 - 1;
596 /* This one is filled in when a ``g'' packet is received. */
597 rsa->actual_register_packet_size = 0;
599 /* Should rsa->sizeof_g_packet needs more space than the
600 default, adjust the size accordingly. Remember that each byte is
601 encoded as two characters. 32 is the overhead for the packet
602 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
603 (``$NN:G...#NN'') is a better guess, the below has been padded a
605 if (rsa->sizeof_g_packet > ((rsa->remote_packet_size - 32) / 2))
606 rsa->remote_packet_size = (rsa->sizeof_g_packet * 2 + 32);
608 /* Make sure that the packet buffer is plenty big enough for
609 this architecture. */
610 if (rs->buf_size < rsa->remote_packet_size)
612 rs->buf_size = 2 * rsa->remote_packet_size;
613 rs->buf = xrealloc (rs->buf, rs->buf_size);
619 /* Return the current allowed size of a remote packet. This is
620 inferred from the current architecture, and should be used to
621 limit the length of outgoing packets. */
623 get_remote_packet_size (void)
625 struct remote_state *rs = get_remote_state ();
626 struct remote_arch_state *rsa = get_remote_arch_state ();
628 if (rs->explicit_packet_size)
629 return rs->explicit_packet_size;
631 return rsa->remote_packet_size;
634 static struct packet_reg *
635 packet_reg_from_regnum (struct remote_arch_state *rsa, long regnum)
637 if (regnum < 0 && regnum >= gdbarch_num_regs (target_gdbarch))
641 struct packet_reg *r = &rsa->regs[regnum];
643 gdb_assert (r->regnum == regnum);
648 static struct packet_reg *
649 packet_reg_from_pnum (struct remote_arch_state *rsa, LONGEST pnum)
653 for (i = 0; i < gdbarch_num_regs (target_gdbarch); i++)
655 struct packet_reg *r = &rsa->regs[i];
663 /* FIXME: graces/2002-08-08: These variables should eventually be
664 bound to an instance of the target object (as in gdbarch-tdep()),
665 when such a thing exists. */
667 /* This is set to the data address of the access causing the target
668 to stop for a watchpoint. */
669 static CORE_ADDR remote_watch_data_address;
671 /* This is non-zero if target stopped for a watchpoint. */
672 static int remote_stopped_by_watchpoint_p;
674 static struct target_ops remote_ops;
676 static struct target_ops extended_remote_ops;
678 static int remote_async_mask_value = 1;
680 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
681 ``forever'' still use the normal timeout mechanism. This is
682 currently used by the ASYNC code to guarentee that target reads
683 during the initial connect always time-out. Once getpkt has been
684 modified to return a timeout indication and, in turn
685 remote_wait()/wait_for_inferior() have gained a timeout parameter
687 static int wait_forever_enabled_p = 1;
689 /* Allow the user to specify what sequence to send to the remote
690 when he requests a program interruption: Although ^C is usually
691 what remote systems expect (this is the default, here), it is
692 sometimes preferable to send a break. On other systems such
693 as the Linux kernel, a break followed by g, which is Magic SysRq g
694 is required in order to interrupt the execution. */
695 const char interrupt_sequence_control_c[] = "Ctrl-C";
696 const char interrupt_sequence_break[] = "BREAK";
697 const char interrupt_sequence_break_g[] = "BREAK-g";
698 static const char *interrupt_sequence_modes[] =
700 interrupt_sequence_control_c,
701 interrupt_sequence_break,
702 interrupt_sequence_break_g,
705 static const char *interrupt_sequence_mode = interrupt_sequence_control_c;
708 show_interrupt_sequence (struct ui_file *file, int from_tty,
709 struct cmd_list_element *c,
712 if (interrupt_sequence_mode == interrupt_sequence_control_c)
713 fprintf_filtered (file,
714 _("Send the ASCII ETX character (Ctrl-c) "
715 "to the remote target to interrupt the "
716 "execution of the program.\n"));
717 else if (interrupt_sequence_mode == interrupt_sequence_break)
718 fprintf_filtered (file,
719 _("send a break signal to the remote target "
720 "to interrupt the execution of the program.\n"));
721 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
722 fprintf_filtered (file,
723 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
724 "the remote target to interrupt the execution "
725 "of Linux kernel.\n"));
727 internal_error (__FILE__, __LINE__,
728 _("Invalid value for interrupt_sequence_mode: %s."),
729 interrupt_sequence_mode);
732 /* This boolean variable specifies whether interrupt_sequence is sent
733 to the remote target when gdb connects to it.
734 This is mostly needed when you debug the Linux kernel: The Linux kernel
735 expects BREAK g which is Magic SysRq g for connecting gdb. */
736 static int interrupt_on_connect = 0;
738 /* This variable is used to implement the "set/show remotebreak" commands.
739 Since these commands are now deprecated in favor of "set/show remote
740 interrupt-sequence", it no longer has any effect on the code. */
741 static int remote_break;
744 set_remotebreak (char *args, int from_tty, struct cmd_list_element *c)
747 interrupt_sequence_mode = interrupt_sequence_break;
749 interrupt_sequence_mode = interrupt_sequence_control_c;
753 show_remotebreak (struct ui_file *file, int from_tty,
754 struct cmd_list_element *c,
759 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
760 remote_open knows that we don't have a file open when the program
762 static struct serial *remote_desc = NULL;
764 /* This variable sets the number of bits in an address that are to be
765 sent in a memory ("M" or "m") packet. Normally, after stripping
766 leading zeros, the entire address would be sent. This variable
767 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
768 initial implementation of remote.c restricted the address sent in
769 memory packets to ``host::sizeof long'' bytes - (typically 32
770 bits). Consequently, for 64 bit targets, the upper 32 bits of an
771 address was never sent. Since fixing this bug may cause a break in
772 some remote targets this variable is principly provided to
773 facilitate backward compatibility. */
775 static int remote_address_size;
777 /* Temporary to track who currently owns the terminal. See
778 remote_terminal_* for more details. */
780 static int remote_async_terminal_ours_p;
782 /* The executable file to use for "run" on the remote side. */
784 static char *remote_exec_file = "";
787 /* User configurable variables for the number of characters in a
788 memory read/write packet. MIN (rsa->remote_packet_size,
789 rsa->sizeof_g_packet) is the default. Some targets need smaller
790 values (fifo overruns, et.al.) and some users need larger values
791 (speed up transfers). The variables ``preferred_*'' (the user
792 request), ``current_*'' (what was actually set) and ``forced_*''
793 (Positive - a soft limit, negative - a hard limit). */
795 struct memory_packet_config
802 /* Compute the current size of a read/write packet. Since this makes
803 use of ``actual_register_packet_size'' the computation is dynamic. */
806 get_memory_packet_size (struct memory_packet_config *config)
808 struct remote_state *rs = get_remote_state ();
809 struct remote_arch_state *rsa = get_remote_arch_state ();
811 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
812 law?) that some hosts don't cope very well with large alloca()
813 calls. Eventually the alloca() code will be replaced by calls to
814 xmalloc() and make_cleanups() allowing this restriction to either
815 be lifted or removed. */
816 #ifndef MAX_REMOTE_PACKET_SIZE
817 #define MAX_REMOTE_PACKET_SIZE 16384
819 /* NOTE: 20 ensures we can write at least one byte. */
820 #ifndef MIN_REMOTE_PACKET_SIZE
821 #define MIN_REMOTE_PACKET_SIZE 20
826 if (config->size <= 0)
827 what_they_get = MAX_REMOTE_PACKET_SIZE;
829 what_they_get = config->size;
833 what_they_get = get_remote_packet_size ();
834 /* Limit the packet to the size specified by the user. */
836 && what_they_get > config->size)
837 what_they_get = config->size;
839 /* Limit it to the size of the targets ``g'' response unless we have
840 permission from the stub to use a larger packet size. */
841 if (rs->explicit_packet_size == 0
842 && rsa->actual_register_packet_size > 0
843 && what_they_get > rsa->actual_register_packet_size)
844 what_they_get = rsa->actual_register_packet_size;
846 if (what_they_get > MAX_REMOTE_PACKET_SIZE)
847 what_they_get = MAX_REMOTE_PACKET_SIZE;
848 if (what_they_get < MIN_REMOTE_PACKET_SIZE)
849 what_they_get = MIN_REMOTE_PACKET_SIZE;
851 /* Make sure there is room in the global buffer for this packet
852 (including its trailing NUL byte). */
853 if (rs->buf_size < what_they_get + 1)
855 rs->buf_size = 2 * what_they_get;
856 rs->buf = xrealloc (rs->buf, 2 * what_they_get);
859 return what_they_get;
862 /* Update the size of a read/write packet. If they user wants
863 something really big then do a sanity check. */
866 set_memory_packet_size (char *args, struct memory_packet_config *config)
868 int fixed_p = config->fixed_p;
869 long size = config->size;
872 error (_("Argument required (integer, `fixed' or `limited')."));
873 else if (strcmp (args, "hard") == 0
874 || strcmp (args, "fixed") == 0)
876 else if (strcmp (args, "soft") == 0
877 || strcmp (args, "limit") == 0)
883 size = strtoul (args, &end, 0);
885 error (_("Invalid %s (bad syntax)."), config->name);
887 /* Instead of explicitly capping the size of a packet to
888 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
889 instead allowed to set the size to something arbitrarily
891 if (size > MAX_REMOTE_PACKET_SIZE)
892 error (_("Invalid %s (too large)."), config->name);
896 if (fixed_p && !config->fixed_p)
898 if (! query (_("The target may not be able to correctly handle a %s\n"
899 "of %ld bytes. Change the packet size? "),
901 error (_("Packet size not changed."));
903 /* Update the config. */
904 config->fixed_p = fixed_p;
909 show_memory_packet_size (struct memory_packet_config *config)
911 printf_filtered (_("The %s is %ld. "), config->name, config->size);
913 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
914 get_memory_packet_size (config));
916 printf_filtered (_("Packets are limited to %ld bytes.\n"),
917 get_memory_packet_size (config));
920 static struct memory_packet_config memory_write_packet_config =
922 "memory-write-packet-size",
926 set_memory_write_packet_size (char *args, int from_tty)
928 set_memory_packet_size (args, &memory_write_packet_config);
932 show_memory_write_packet_size (char *args, int from_tty)
934 show_memory_packet_size (&memory_write_packet_config);
938 get_memory_write_packet_size (void)
940 return get_memory_packet_size (&memory_write_packet_config);
943 static struct memory_packet_config memory_read_packet_config =
945 "memory-read-packet-size",
949 set_memory_read_packet_size (char *args, int from_tty)
951 set_memory_packet_size (args, &memory_read_packet_config);
955 show_memory_read_packet_size (char *args, int from_tty)
957 show_memory_packet_size (&memory_read_packet_config);
961 get_memory_read_packet_size (void)
963 long size = get_memory_packet_size (&memory_read_packet_config);
965 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
966 extra buffer size argument before the memory read size can be
967 increased beyond this. */
968 if (size > get_remote_packet_size ())
969 size = get_remote_packet_size ();
974 /* Generic configuration support for packets the stub optionally
975 supports. Allows the user to specify the use of the packet as well
976 as allowing GDB to auto-detect support in the remote stub. */
980 PACKET_SUPPORT_UNKNOWN = 0,
989 enum auto_boolean detect;
990 enum packet_support support;
993 /* Analyze a packet's return value and update the packet config
1004 update_packet_config (struct packet_config *config)
1006 switch (config->detect)
1008 case AUTO_BOOLEAN_TRUE:
1009 config->support = PACKET_ENABLE;
1011 case AUTO_BOOLEAN_FALSE:
1012 config->support = PACKET_DISABLE;
1014 case AUTO_BOOLEAN_AUTO:
1015 config->support = PACKET_SUPPORT_UNKNOWN;
1021 show_packet_config_cmd (struct packet_config *config)
1023 char *support = "internal-error";
1025 switch (config->support)
1028 support = "enabled";
1030 case PACKET_DISABLE:
1031 support = "disabled";
1033 case PACKET_SUPPORT_UNKNOWN:
1034 support = "unknown";
1037 switch (config->detect)
1039 case AUTO_BOOLEAN_AUTO:
1040 printf_filtered (_("Support for the `%s' packet is auto-detected, currently %s.\n"),
1041 config->name, support);
1043 case AUTO_BOOLEAN_TRUE:
1044 case AUTO_BOOLEAN_FALSE:
1045 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1046 config->name, support);
1052 add_packet_config_cmd (struct packet_config *config, const char *name,
1053 const char *title, int legacy)
1059 config->name = name;
1060 config->title = title;
1061 config->detect = AUTO_BOOLEAN_AUTO;
1062 config->support = PACKET_SUPPORT_UNKNOWN;
1063 set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1065 show_doc = xstrprintf ("Show current use of remote protocol `%s' (%s) packet",
1067 /* set/show TITLE-packet {auto,on,off} */
1068 cmd_name = xstrprintf ("%s-packet", title);
1069 add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
1070 &config->detect, set_doc, show_doc, NULL, /* help_doc */
1071 set_remote_protocol_packet_cmd,
1072 show_remote_protocol_packet_cmd,
1073 &remote_set_cmdlist, &remote_show_cmdlist);
1074 /* The command code copies the documentation strings. */
1077 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1082 legacy_name = xstrprintf ("%s-packet", name);
1083 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1084 &remote_set_cmdlist);
1085 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1086 &remote_show_cmdlist);
1090 static enum packet_result
1091 packet_check_result (const char *buf)
1095 /* The stub recognized the packet request. Check that the
1096 operation succeeded. */
1098 && isxdigit (buf[1]) && isxdigit (buf[2])
1100 /* "Enn" - definitly an error. */
1101 return PACKET_ERROR;
1103 /* Always treat "E." as an error. This will be used for
1104 more verbose error messages, such as E.memtypes. */
1105 if (buf[0] == 'E' && buf[1] == '.')
1106 return PACKET_ERROR;
1108 /* The packet may or may not be OK. Just assume it is. */
1112 /* The stub does not support the packet. */
1113 return PACKET_UNKNOWN;
1116 static enum packet_result
1117 packet_ok (const char *buf, struct packet_config *config)
1119 enum packet_result result;
1121 result = packet_check_result (buf);
1126 /* The stub recognized the packet request. */
1127 switch (config->support)
1129 case PACKET_SUPPORT_UNKNOWN:
1131 fprintf_unfiltered (gdb_stdlog,
1132 "Packet %s (%s) is supported\n",
1133 config->name, config->title);
1134 config->support = PACKET_ENABLE;
1136 case PACKET_DISABLE:
1137 internal_error (__FILE__, __LINE__,
1138 _("packet_ok: attempt to use a disabled packet"));
1144 case PACKET_UNKNOWN:
1145 /* The stub does not support the packet. */
1146 switch (config->support)
1149 if (config->detect == AUTO_BOOLEAN_AUTO)
1150 /* If the stub previously indicated that the packet was
1151 supported then there is a protocol error.. */
1152 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1153 config->name, config->title);
1155 /* The user set it wrong. */
1156 error (_("Enabled packet %s (%s) not recognized by stub"),
1157 config->name, config->title);
1159 case PACKET_SUPPORT_UNKNOWN:
1161 fprintf_unfiltered (gdb_stdlog,
1162 "Packet %s (%s) is NOT supported\n",
1163 config->name, config->title);
1164 config->support = PACKET_DISABLE;
1166 case PACKET_DISABLE:
1188 PACKET_vFile_pwrite,
1190 PACKET_vFile_unlink,
1192 PACKET_qXfer_features,
1193 PACKET_qXfer_libraries,
1194 PACKET_qXfer_memory_map,
1195 PACKET_qXfer_spu_read,
1196 PACKET_qXfer_spu_write,
1197 PACKET_qXfer_osdata,
1198 PACKET_qXfer_threads,
1202 PACKET_QPassSignals,
1203 PACKET_qSearch_memory,
1206 PACKET_QStartNoAckMode,
1208 PACKET_qXfer_siginfo_read,
1209 PACKET_qXfer_siginfo_write,
1211 PACKET_ConditionalTracepoints,
1212 PACKET_FastTracepoints,
1215 PACKET_TracepointSource,
1219 static struct packet_config remote_protocol_packets[PACKET_MAX];
1222 set_remote_protocol_packet_cmd (char *args, int from_tty,
1223 struct cmd_list_element *c)
1225 struct packet_config *packet;
1227 for (packet = remote_protocol_packets;
1228 packet < &remote_protocol_packets[PACKET_MAX];
1231 if (&packet->detect == c->var)
1233 update_packet_config (packet);
1237 internal_error (__FILE__, __LINE__, "Could not find config for %s",
1242 show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty,
1243 struct cmd_list_element *c,
1246 struct packet_config *packet;
1248 for (packet = remote_protocol_packets;
1249 packet < &remote_protocol_packets[PACKET_MAX];
1252 if (&packet->detect == c->var)
1254 show_packet_config_cmd (packet);
1258 internal_error (__FILE__, __LINE__, "Could not find config for %s",
1262 /* Should we try one of the 'Z' requests? */
1266 Z_PACKET_SOFTWARE_BP,
1267 Z_PACKET_HARDWARE_BP,
1274 /* For compatibility with older distributions. Provide a ``set remote
1275 Z-packet ...'' command that updates all the Z packet types. */
1277 static enum auto_boolean remote_Z_packet_detect;
1280 set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
1281 struct cmd_list_element *c)
1285 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1287 remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect;
1288 update_packet_config (&remote_protocol_packets[PACKET_Z0 + i]);
1293 show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty,
1294 struct cmd_list_element *c,
1299 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1301 show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]);
1305 /* Should we try the 'ThreadInfo' query packet?
1307 This variable (NOT available to the user: auto-detect only!)
1308 determines whether GDB will use the new, simpler "ThreadInfo"
1309 query or the older, more complex syntax for thread queries.
1310 This is an auto-detect variable (set to true at each connect,
1311 and set to false when the target fails to recognize it). */
1313 static int use_threadinfo_query;
1314 static int use_threadextra_query;
1316 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1317 static struct async_signal_handler *sigint_remote_twice_token;
1318 static struct async_signal_handler *sigint_remote_token;
1321 /* Asynchronous signal handle registered as event loop source for
1322 when we have pending events ready to be passed to the core. */
1324 static struct async_event_handler *remote_async_inferior_event_token;
1326 /* Asynchronous signal handle registered as event loop source for when
1327 the remote sent us a %Stop notification. The registered callback
1328 will do a vStopped sequence to pull the rest of the events out of
1329 the remote side into our event queue. */
1331 static struct async_event_handler *remote_async_get_pending_events_token;
1334 static ptid_t magic_null_ptid;
1335 static ptid_t not_sent_ptid;
1336 static ptid_t any_thread_ptid;
1338 /* These are the threads which we last sent to the remote system. The
1339 TID member will be -1 for all or -2 for not sent yet. */
1341 static ptid_t general_thread;
1342 static ptid_t continue_thread;
1344 /* Find out if the stub attached to PID (and hence GDB should offer to
1345 detach instead of killing it when bailing out). */
1348 remote_query_attached (int pid)
1350 struct remote_state *rs = get_remote_state ();
1352 if (remote_protocol_packets[PACKET_qAttached].support == PACKET_DISABLE)
1355 if (remote_multi_process_p (rs))
1356 sprintf (rs->buf, "qAttached:%x", pid);
1358 sprintf (rs->buf, "qAttached");
1361 getpkt (&rs->buf, &rs->buf_size, 0);
1363 switch (packet_ok (rs->buf,
1364 &remote_protocol_packets[PACKET_qAttached]))
1367 if (strcmp (rs->buf, "1") == 0)
1371 warning (_("Remote failure reply: %s"), rs->buf);
1373 case PACKET_UNKNOWN:
1380 /* Add PID to GDB's inferior table. Since we can be connected to a
1381 remote system before before knowing about any inferior, mark the
1382 target with execution when we find the first inferior. If ATTACHED
1383 is 1, then we had just attached to this inferior. If it is 0, then
1384 we just created this inferior. If it is -1, then try querying the
1385 remote stub to find out if it had attached to the inferior or
1388 static struct inferior *
1389 remote_add_inferior (int pid, int attached)
1391 struct inferior *inf;
1393 /* Check whether this process we're learning about is to be
1394 considered attached, or if is to be considered to have been
1395 spawned by the stub. */
1397 attached = remote_query_attached (pid);
1399 if (gdbarch_has_global_solist (target_gdbarch))
1401 /* If the target shares code across all inferiors, then every
1402 attach adds a new inferior. */
1403 inf = add_inferior (pid);
1405 /* ... and every inferior is bound to the same program space.
1406 However, each inferior may still have its own address
1408 inf->aspace = maybe_new_address_space ();
1409 inf->pspace = current_program_space;
1413 /* In the traditional debugging scenario, there's a 1-1 match
1414 between program/address spaces. We simply bind the inferior
1415 to the program space's address space. */
1416 inf = current_inferior ();
1417 inferior_appeared (inf, pid);
1420 inf->attach_flag = attached;
1425 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1426 according to RUNNING. */
1429 remote_add_thread (ptid_t ptid, int running)
1433 set_executing (ptid, running);
1434 set_running (ptid, running);
1437 /* Come here when we learn about a thread id from the remote target.
1438 It may be the first time we hear about such thread, so take the
1439 opportunity to add it to GDB's thread list. In case this is the
1440 first time we're noticing its corresponding inferior, add it to
1441 GDB's inferior list as well. */
1444 remote_notice_new_inferior (ptid_t currthread, int running)
1446 /* If this is a new thread, add it to GDB's thread list.
1447 If we leave it up to WFI to do this, bad things will happen. */
1449 if (in_thread_list (currthread) && is_exited (currthread))
1451 /* We're seeing an event on a thread id we knew had exited.
1452 This has to be a new thread reusing the old id. Add it. */
1453 remote_add_thread (currthread, running);
1457 if (!in_thread_list (currthread))
1459 struct inferior *inf = NULL;
1460 int pid = ptid_get_pid (currthread);
1462 if (ptid_is_pid (inferior_ptid)
1463 && pid == ptid_get_pid (inferior_ptid))
1465 /* inferior_ptid has no thread member yet. This can happen
1466 with the vAttach -> remote_wait,"TAAthread:" path if the
1467 stub doesn't support qC. This is the first stop reported
1468 after an attach, so this is the main thread. Update the
1469 ptid in the thread list. */
1470 if (in_thread_list (pid_to_ptid (pid)))
1471 thread_change_ptid (inferior_ptid, currthread);
1474 remote_add_thread (currthread, running);
1475 inferior_ptid = currthread;
1480 if (ptid_equal (magic_null_ptid, inferior_ptid))
1482 /* inferior_ptid is not set yet. This can happen with the
1483 vRun -> remote_wait,"TAAthread:" path if the stub
1484 doesn't support qC. This is the first stop reported
1485 after an attach, so this is the main thread. Update the
1486 ptid in the thread list. */
1487 thread_change_ptid (inferior_ptid, currthread);
1491 /* When connecting to a target remote, or to a target
1492 extended-remote which already was debugging an inferior, we
1493 may not know about it yet. Add it before adding its child
1494 thread, so notifications are emitted in a sensible order. */
1495 if (!in_inferior_list (ptid_get_pid (currthread)))
1496 inf = remote_add_inferior (ptid_get_pid (currthread), -1);
1498 /* This is really a new thread. Add it. */
1499 remote_add_thread (currthread, running);
1501 /* If we found a new inferior, let the common code do whatever
1502 it needs to with it (e.g., read shared libraries, insert
1505 notice_new_inferior (currthread, running, 0);
1509 /* Return the private thread data, creating it if necessary. */
1511 struct private_thread_info *
1512 demand_private_info (ptid_t ptid)
1514 struct thread_info *info = find_thread_ptid (ptid);
1520 info->private = xmalloc (sizeof (*(info->private)));
1521 info->private_dtor = free_private_thread_info;
1522 info->private->core = -1;
1523 info->private->extra = 0;
1526 return info->private;
1529 /* Call this function as a result of
1530 1) A halt indication (T packet) containing a thread id
1531 2) A direct query of currthread
1532 3) Successful execution of set thread
1536 record_currthread (ptid_t currthread)
1538 general_thread = currthread;
1541 static char *last_pass_packet;
1543 /* If 'QPassSignals' is supported, tell the remote stub what signals
1544 it can simply pass through to the inferior without reporting. */
1547 remote_pass_signals (void)
1549 if (remote_protocol_packets[PACKET_QPassSignals].support != PACKET_DISABLE)
1551 char *pass_packet, *p;
1552 int numsigs = (int) TARGET_SIGNAL_LAST;
1555 gdb_assert (numsigs < 256);
1556 for (i = 0; i < numsigs; i++)
1558 if (signal_stop_state (i) == 0
1559 && signal_print_state (i) == 0
1560 && signal_pass_state (i) == 1)
1563 pass_packet = xmalloc (count * 3 + strlen ("QPassSignals:") + 1);
1564 strcpy (pass_packet, "QPassSignals:");
1565 p = pass_packet + strlen (pass_packet);
1566 for (i = 0; i < numsigs; i++)
1568 if (signal_stop_state (i) == 0
1569 && signal_print_state (i) == 0
1570 && signal_pass_state (i) == 1)
1573 *p++ = tohex (i >> 4);
1574 *p++ = tohex (i & 15);
1583 if (!last_pass_packet || strcmp (last_pass_packet, pass_packet))
1585 struct remote_state *rs = get_remote_state ();
1586 char *buf = rs->buf;
1588 putpkt (pass_packet);
1589 getpkt (&rs->buf, &rs->buf_size, 0);
1590 packet_ok (buf, &remote_protocol_packets[PACKET_QPassSignals]);
1591 if (last_pass_packet)
1592 xfree (last_pass_packet);
1593 last_pass_packet = pass_packet;
1596 xfree (pass_packet);
1601 remote_notice_signals (ptid_t ptid)
1603 /* Update the remote on signals to silently pass, if they've
1605 remote_pass_signals ();
1608 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
1609 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
1610 thread. If GEN is set, set the general thread, if not, then set
1611 the step/continue thread. */
1613 set_thread (struct ptid ptid, int gen)
1615 struct remote_state *rs = get_remote_state ();
1616 ptid_t state = gen ? general_thread : continue_thread;
1617 char *buf = rs->buf;
1618 char *endbuf = rs->buf + get_remote_packet_size ();
1620 if (ptid_equal (state, ptid))
1624 *buf++ = gen ? 'g' : 'c';
1625 if (ptid_equal (ptid, magic_null_ptid))
1626 xsnprintf (buf, endbuf - buf, "0");
1627 else if (ptid_equal (ptid, any_thread_ptid))
1628 xsnprintf (buf, endbuf - buf, "0");
1629 else if (ptid_equal (ptid, minus_one_ptid))
1630 xsnprintf (buf, endbuf - buf, "-1");
1632 write_ptid (buf, endbuf, ptid);
1634 getpkt (&rs->buf, &rs->buf_size, 0);
1636 general_thread = ptid;
1638 continue_thread = ptid;
1642 set_general_thread (struct ptid ptid)
1644 set_thread (ptid, 1);
1648 set_continue_thread (struct ptid ptid)
1650 set_thread (ptid, 0);
1653 /* Change the remote current process. Which thread within the process
1654 ends up selected isn't important, as long as it is the same process
1655 as what INFERIOR_PTID points to.
1657 This comes from that fact that there is no explicit notion of
1658 "selected process" in the protocol. The selected process for
1659 general operations is the process the selected general thread
1663 set_general_process (void)
1665 struct remote_state *rs = get_remote_state ();
1667 /* If the remote can't handle multiple processes, don't bother. */
1668 if (!remote_multi_process_p (rs))
1671 /* We only need to change the remote current thread if it's pointing
1672 at some other process. */
1673 if (ptid_get_pid (general_thread) != ptid_get_pid (inferior_ptid))
1674 set_general_thread (inferior_ptid);
1678 /* Return nonzero if the thread PTID is still alive on the remote
1682 remote_thread_alive (struct target_ops *ops, ptid_t ptid)
1684 struct remote_state *rs = get_remote_state ();
1687 if (ptid_equal (ptid, magic_null_ptid))
1688 /* The main thread is always alive. */
1691 if (ptid_get_pid (ptid) != 0 && ptid_get_tid (ptid) == 0)
1692 /* The main thread is always alive. This can happen after a
1693 vAttach, if the remote side doesn't support
1698 endp = rs->buf + get_remote_packet_size ();
1701 write_ptid (p, endp, ptid);
1704 getpkt (&rs->buf, &rs->buf_size, 0);
1705 return (rs->buf[0] == 'O' && rs->buf[1] == 'K');
1708 /* About these extended threadlist and threadinfo packets. They are
1709 variable length packets but, the fields within them are often fixed
1710 length. They are redundent enough to send over UDP as is the
1711 remote protocol in general. There is a matching unit test module
1714 #define OPAQUETHREADBYTES 8
1716 /* a 64 bit opaque identifier */
1717 typedef unsigned char threadref[OPAQUETHREADBYTES];
1719 /* WARNING: This threadref data structure comes from the remote O.S.,
1720 libstub protocol encoding, and remote.c. it is not particularly
1723 /* Right now, the internal structure is int. We want it to be bigger.
1727 typedef int gdb_threadref; /* Internal GDB thread reference. */
1729 /* gdb_ext_thread_info is an internal GDB data structure which is
1730 equivalent to the reply of the remote threadinfo packet. */
1732 struct gdb_ext_thread_info
1734 threadref threadid; /* External form of thread reference. */
1735 int active; /* Has state interesting to GDB?
1737 char display[256]; /* Brief state display, name,
1738 blocked/suspended. */
1739 char shortname[32]; /* To be used to name threads. */
1740 char more_display[256]; /* Long info, statistics, queue depth,
1744 /* The volume of remote transfers can be limited by submitting
1745 a mask containing bits specifying the desired information.
1746 Use a union of these values as the 'selection' parameter to
1747 get_thread_info. FIXME: Make these TAG names more thread specific.
1750 #define TAG_THREADID 1
1751 #define TAG_EXISTS 2
1752 #define TAG_DISPLAY 4
1753 #define TAG_THREADNAME 8
1754 #define TAG_MOREDISPLAY 16
1756 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1758 char *unpack_varlen_hex (char *buff, ULONGEST *result);
1760 static char *unpack_nibble (char *buf, int *val);
1762 static char *pack_nibble (char *buf, int nibble);
1764 static char *pack_hex_byte (char *pkt, int /* unsigned char */ byte);
1766 static char *unpack_byte (char *buf, int *value);
1768 static char *pack_int (char *buf, int value);
1770 static char *unpack_int (char *buf, int *value);
1772 static char *unpack_string (char *src, char *dest, int length);
1774 static char *pack_threadid (char *pkt, threadref *id);
1776 static char *unpack_threadid (char *inbuf, threadref *id);
1778 void int_to_threadref (threadref *id, int value);
1780 static int threadref_to_int (threadref *ref);
1782 static void copy_threadref (threadref *dest, threadref *src);
1784 static int threadmatch (threadref *dest, threadref *src);
1786 static char *pack_threadinfo_request (char *pkt, int mode,
1789 static int remote_unpack_thread_info_response (char *pkt,
1790 threadref *expectedref,
1791 struct gdb_ext_thread_info
1795 static int remote_get_threadinfo (threadref *threadid,
1796 int fieldset, /*TAG mask */
1797 struct gdb_ext_thread_info *info);
1799 static char *pack_threadlist_request (char *pkt, int startflag,
1801 threadref *nextthread);
1803 static int parse_threadlist_response (char *pkt,
1805 threadref *original_echo,
1806 threadref *resultlist,
1809 static int remote_get_threadlist (int startflag,
1810 threadref *nextthread,
1814 threadref *threadlist);
1816 typedef int (*rmt_thread_action) (threadref *ref, void *context);
1818 static int remote_threadlist_iterator (rmt_thread_action stepfunction,
1819 void *context, int looplimit);
1821 static int remote_newthread_step (threadref *ref, void *context);
1824 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
1825 buffer we're allowed to write to. Returns
1826 BUF+CHARACTERS_WRITTEN. */
1829 write_ptid (char *buf, const char *endbuf, ptid_t ptid)
1832 struct remote_state *rs = get_remote_state ();
1834 if (remote_multi_process_p (rs))
1836 pid = ptid_get_pid (ptid);
1838 buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid);
1840 buf += xsnprintf (buf, endbuf - buf, "p%x.", pid);
1842 tid = ptid_get_tid (ptid);
1844 buf += xsnprintf (buf, endbuf - buf, "-%x", -tid);
1846 buf += xsnprintf (buf, endbuf - buf, "%x", tid);
1851 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
1852 passed the last parsed char. Returns null_ptid on error. */
1855 read_ptid (char *buf, char **obuf)
1859 ULONGEST pid = 0, tid = 0;
1863 /* Multi-process ptid. */
1864 pp = unpack_varlen_hex (p + 1, &pid);
1866 error (_("invalid remote ptid: %s\n"), p);
1869 pp = unpack_varlen_hex (p + 1, &tid);
1872 return ptid_build (pid, 0, tid);
1875 /* No multi-process. Just a tid. */
1876 pp = unpack_varlen_hex (p, &tid);
1878 /* Since the stub is not sending a process id, then default to
1879 what's in inferior_ptid, unless it's null at this point. If so,
1880 then since there's no way to know the pid of the reported
1881 threads, use the magic number. */
1882 if (ptid_equal (inferior_ptid, null_ptid))
1883 pid = ptid_get_pid (magic_null_ptid);
1885 pid = ptid_get_pid (inferior_ptid);
1889 return ptid_build (pid, 0, tid);
1892 /* Encode 64 bits in 16 chars of hex. */
1894 static const char hexchars[] = "0123456789abcdef";
1897 ishex (int ch, int *val)
1899 if ((ch >= 'a') && (ch <= 'f'))
1901 *val = ch - 'a' + 10;
1904 if ((ch >= 'A') && (ch <= 'F'))
1906 *val = ch - 'A' + 10;
1909 if ((ch >= '0') && (ch <= '9'))
1920 if (ch >= 'a' && ch <= 'f')
1921 return ch - 'a' + 10;
1922 if (ch >= '0' && ch <= '9')
1924 if (ch >= 'A' && ch <= 'F')
1925 return ch - 'A' + 10;
1930 stub_unpack_int (char *buff, int fieldlength)
1937 nibble = stubhex (*buff++);
1941 retval = retval << 4;
1947 unpack_varlen_hex (char *buff, /* packet to parse */
1951 ULONGEST retval = 0;
1953 while (ishex (*buff, &nibble))
1956 retval = retval << 4;
1957 retval |= nibble & 0x0f;
1964 unpack_nibble (char *buf, int *val)
1966 *val = fromhex (*buf++);
1971 pack_nibble (char *buf, int nibble)
1973 *buf++ = hexchars[(nibble & 0x0f)];
1978 pack_hex_byte (char *pkt, int byte)
1980 *pkt++ = hexchars[(byte >> 4) & 0xf];
1981 *pkt++ = hexchars[(byte & 0xf)];
1986 unpack_byte (char *buf, int *value)
1988 *value = stub_unpack_int (buf, 2);
1993 pack_int (char *buf, int value)
1995 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
1996 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
1997 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
1998 buf = pack_hex_byte (buf, (value & 0xff));
2003 unpack_int (char *buf, int *value)
2005 *value = stub_unpack_int (buf, 8);
2009 #if 0 /* Currently unused, uncomment when needed. */
2010 static char *pack_string (char *pkt, char *string);
2013 pack_string (char *pkt, char *string)
2018 len = strlen (string);
2020 len = 200; /* Bigger than most GDB packets, junk??? */
2021 pkt = pack_hex_byte (pkt, len);
2025 if ((ch == '\0') || (ch == '#'))
2026 ch = '*'; /* Protect encapsulation. */
2031 #endif /* 0 (unused) */
2034 unpack_string (char *src, char *dest, int length)
2043 pack_threadid (char *pkt, threadref *id)
2046 unsigned char *altid;
2048 altid = (unsigned char *) id;
2049 limit = pkt + BUF_THREAD_ID_SIZE;
2051 pkt = pack_hex_byte (pkt, *altid++);
2057 unpack_threadid (char *inbuf, threadref *id)
2060 char *limit = inbuf + BUF_THREAD_ID_SIZE;
2063 altref = (char *) id;
2065 while (inbuf < limit)
2067 x = stubhex (*inbuf++);
2068 y = stubhex (*inbuf++);
2069 *altref++ = (x << 4) | y;
2074 /* Externally, threadrefs are 64 bits but internally, they are still
2075 ints. This is due to a mismatch of specifications. We would like
2076 to use 64bit thread references internally. This is an adapter
2080 int_to_threadref (threadref *id, int value)
2082 unsigned char *scan;
2084 scan = (unsigned char *) id;
2090 *scan++ = (value >> 24) & 0xff;
2091 *scan++ = (value >> 16) & 0xff;
2092 *scan++ = (value >> 8) & 0xff;
2093 *scan++ = (value & 0xff);
2097 threadref_to_int (threadref *ref)
2100 unsigned char *scan;
2106 value = (value << 8) | ((*scan++) & 0xff);
2111 copy_threadref (threadref *dest, threadref *src)
2114 unsigned char *csrc, *cdest;
2116 csrc = (unsigned char *) src;
2117 cdest = (unsigned char *) dest;
2124 threadmatch (threadref *dest, threadref *src)
2126 /* Things are broken right now, so just assume we got a match. */
2128 unsigned char *srcp, *destp;
2130 srcp = (char *) src;
2131 destp = (char *) dest;
2135 result &= (*srcp++ == *destp++) ? 1 : 0;
2142 threadid:1, # always request threadid
2149 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2152 pack_threadinfo_request (char *pkt, int mode, threadref *id)
2154 *pkt++ = 'q'; /* Info Query */
2155 *pkt++ = 'P'; /* process or thread info */
2156 pkt = pack_int (pkt, mode); /* mode */
2157 pkt = pack_threadid (pkt, id); /* threadid */
2158 *pkt = '\0'; /* terminate */
2162 /* These values tag the fields in a thread info response packet. */
2163 /* Tagging the fields allows us to request specific fields and to
2164 add more fields as time goes by. */
2166 #define TAG_THREADID 1 /* Echo the thread identifier. */
2167 #define TAG_EXISTS 2 /* Is this process defined enough to
2168 fetch registers and its stack? */
2169 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2170 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2171 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2175 remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
2176 struct gdb_ext_thread_info *info)
2178 struct remote_state *rs = get_remote_state ();
2182 char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */
2185 /* info->threadid = 0; FIXME: implement zero_threadref. */
2187 info->display[0] = '\0';
2188 info->shortname[0] = '\0';
2189 info->more_display[0] = '\0';
2191 /* Assume the characters indicating the packet type have been
2193 pkt = unpack_int (pkt, &mask); /* arg mask */
2194 pkt = unpack_threadid (pkt, &ref);
2197 warning (_("Incomplete response to threadinfo request."));
2198 if (!threadmatch (&ref, expectedref))
2199 { /* This is an answer to a different request. */
2200 warning (_("ERROR RMT Thread info mismatch."));
2203 copy_threadref (&info->threadid, &ref);
2205 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2207 /* Packets are terminated with nulls. */
2208 while ((pkt < limit) && mask && *pkt)
2210 pkt = unpack_int (pkt, &tag); /* tag */
2211 pkt = unpack_byte (pkt, &length); /* length */
2212 if (!(tag & mask)) /* Tags out of synch with mask. */
2214 warning (_("ERROR RMT: threadinfo tag mismatch."));
2218 if (tag == TAG_THREADID)
2222 warning (_("ERROR RMT: length of threadid is not 16."));
2226 pkt = unpack_threadid (pkt, &ref);
2227 mask = mask & ~TAG_THREADID;
2230 if (tag == TAG_EXISTS)
2232 info->active = stub_unpack_int (pkt, length);
2234 mask = mask & ~(TAG_EXISTS);
2237 warning (_("ERROR RMT: 'exists' length too long."));
2243 if (tag == TAG_THREADNAME)
2245 pkt = unpack_string (pkt, &info->shortname[0], length);
2246 mask = mask & ~TAG_THREADNAME;
2249 if (tag == TAG_DISPLAY)
2251 pkt = unpack_string (pkt, &info->display[0], length);
2252 mask = mask & ~TAG_DISPLAY;
2255 if (tag == TAG_MOREDISPLAY)
2257 pkt = unpack_string (pkt, &info->more_display[0], length);
2258 mask = mask & ~TAG_MOREDISPLAY;
2261 warning (_("ERROR RMT: unknown thread info tag."));
2262 break; /* Not a tag we know about. */
2268 remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
2269 struct gdb_ext_thread_info *info)
2271 struct remote_state *rs = get_remote_state ();
2274 pack_threadinfo_request (rs->buf, fieldset, threadid);
2276 getpkt (&rs->buf, &rs->buf_size, 0);
2278 if (rs->buf[0] == '\0')
2281 result = remote_unpack_thread_info_response (rs->buf + 2,
2286 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2289 pack_threadlist_request (char *pkt, int startflag, int threadcount,
2290 threadref *nextthread)
2292 *pkt++ = 'q'; /* info query packet */
2293 *pkt++ = 'L'; /* Process LIST or threadLIST request */
2294 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
2295 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
2296 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
2301 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2304 parse_threadlist_response (char *pkt, int result_limit,
2305 threadref *original_echo, threadref *resultlist,
2308 struct remote_state *rs = get_remote_state ();
2310 int count, resultcount, done;
2313 /* Assume the 'q' and 'M chars have been stripped. */
2314 limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE);
2315 /* done parse past here */
2316 pkt = unpack_byte (pkt, &count); /* count field */
2317 pkt = unpack_nibble (pkt, &done);
2318 /* The first threadid is the argument threadid. */
2319 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
2320 while ((count-- > 0) && (pkt < limit))
2322 pkt = unpack_threadid (pkt, resultlist++);
2323 if (resultcount++ >= result_limit)
2332 remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
2333 int *done, int *result_count, threadref *threadlist)
2335 struct remote_state *rs = get_remote_state ();
2336 static threadref echo_nextthread;
2339 /* Trancate result limit to be smaller than the packet size. */
2340 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= get_remote_packet_size ())
2341 result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2;
2343 pack_threadlist_request (rs->buf, startflag, result_limit, nextthread);
2345 getpkt (&rs->buf, &rs->buf_size, 0);
2347 if (*rs->buf == '\0')
2351 parse_threadlist_response (rs->buf + 2, result_limit, &echo_nextthread,
2354 if (!threadmatch (&echo_nextthread, nextthread))
2356 /* FIXME: This is a good reason to drop the packet. */
2357 /* Possably, there is a duplicate response. */
2359 retransmit immediatly - race conditions
2360 retransmit after timeout - yes
2362 wait for packet, then exit
2364 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2365 return 0; /* I choose simply exiting. */
2367 if (*result_count <= 0)
2371 warning (_("RMT ERROR : failed to get remote thread list."));
2374 return result; /* break; */
2376 if (*result_count > result_limit)
2379 warning (_("RMT ERROR: threadlist response longer than requested."));
2385 /* This is the interface between remote and threads, remotes upper
2388 /* remote_find_new_threads retrieves the thread list and for each
2389 thread in the list, looks up the thread in GDB's internal list,
2390 adding the thread if it does not already exist. This involves
2391 getting partial thread lists from the remote target so, polling the
2392 quit_flag is required. */
2395 /* About this many threadisds fit in a packet. */
2397 #define MAXTHREADLISTRESULTS 32
2400 remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
2403 int done, i, result_count;
2407 static threadref nextthread;
2408 static threadref resultthreadlist[MAXTHREADLISTRESULTS];
2413 if (loopcount++ > looplimit)
2416 warning (_("Remote fetch threadlist -infinite loop-."));
2419 if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS,
2420 &done, &result_count, resultthreadlist))
2425 /* Clear for later iterations. */
2427 /* Setup to resume next batch of thread references, set nextthread. */
2428 if (result_count >= 1)
2429 copy_threadref (&nextthread, &resultthreadlist[result_count - 1]);
2431 while (result_count--)
2432 if (!(result = (*stepfunction) (&resultthreadlist[i++], context)))
2439 remote_newthread_step (threadref *ref, void *context)
2441 int pid = ptid_get_pid (inferior_ptid);
2442 ptid_t ptid = ptid_build (pid, 0, threadref_to_int (ref));
2444 if (!in_thread_list (ptid))
2446 return 1; /* continue iterator */
2449 #define CRAZY_MAX_THREADS 1000
2452 remote_current_thread (ptid_t oldpid)
2454 struct remote_state *rs = get_remote_state ();
2457 getpkt (&rs->buf, &rs->buf_size, 0);
2458 if (rs->buf[0] == 'Q' && rs->buf[1] == 'C')
2459 return read_ptid (&rs->buf[2], NULL);
2464 /* Find new threads for info threads command.
2465 * Original version, using John Metzler's thread protocol.
2469 remote_find_new_threads (void)
2471 remote_threadlist_iterator (remote_newthread_step, 0,
2475 #if defined(HAVE_LIBEXPAT)
2477 typedef struct thread_item
2483 DEF_VEC_O(thread_item_t);
2485 struct threads_parsing_context
2487 VEC (thread_item_t) *items;
2491 start_thread (struct gdb_xml_parser *parser,
2492 const struct gdb_xml_element *element,
2493 void *user_data, VEC(gdb_xml_value_s) *attributes)
2495 struct threads_parsing_context *data = user_data;
2497 struct thread_item item;
2500 id = VEC_index (gdb_xml_value_s, attributes, 0)->value;
2501 item.ptid = read_ptid (id, NULL);
2503 if (VEC_length (gdb_xml_value_s, attributes) > 1)
2504 item.core = *(ULONGEST *) VEC_index (gdb_xml_value_s, attributes, 1)->value;
2510 VEC_safe_push (thread_item_t, data->items, &item);
2514 end_thread (struct gdb_xml_parser *parser,
2515 const struct gdb_xml_element *element,
2516 void *user_data, const char *body_text)
2518 struct threads_parsing_context *data = user_data;
2520 if (body_text && *body_text)
2521 VEC_last (thread_item_t, data->items)->extra = xstrdup (body_text);
2524 const struct gdb_xml_attribute thread_attributes[] = {
2525 { "id", GDB_XML_AF_NONE, NULL, NULL },
2526 { "core", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL },
2527 { NULL, GDB_XML_AF_NONE, NULL, NULL }
2530 const struct gdb_xml_element thread_children[] = {
2531 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
2534 const struct gdb_xml_element threads_children[] = {
2535 { "thread", thread_attributes, thread_children,
2536 GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
2537 start_thread, end_thread },
2538 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
2541 const struct gdb_xml_element threads_elements[] = {
2542 { "threads", NULL, threads_children,
2543 GDB_XML_EF_NONE, NULL, NULL },
2544 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
2547 /* Discard the contents of the constructed thread info context. */
2550 clear_threads_parsing_context (void *p)
2552 struct threads_parsing_context *context = p;
2554 struct thread_item *item;
2556 for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i)
2557 xfree (item->extra);
2559 VEC_free (thread_item_t, context->items);
2565 * Find all threads for info threads command.
2566 * Uses new thread protocol contributed by Cisco.
2567 * Falls back and attempts to use the older method (above)
2568 * if the target doesn't respond to the new method.
2572 remote_threads_info (struct target_ops *ops)
2574 struct remote_state *rs = get_remote_state ();
2578 if (remote_desc == 0) /* paranoia */
2579 error (_("Command can only be used when connected to the remote target."));
2581 #if defined(HAVE_LIBEXPAT)
2582 if (remote_protocol_packets[PACKET_qXfer_threads].support == PACKET_ENABLE)
2584 char *xml = target_read_stralloc (¤t_target,
2585 TARGET_OBJECT_THREADS, NULL);
2587 struct cleanup *back_to = make_cleanup (xfree, xml);
2590 struct gdb_xml_parser *parser;
2591 struct threads_parsing_context context;
2592 struct cleanup *clear_parsing_context;
2595 /* Note: this parser cleanup is already guarded by BACK_TO
2597 parser = gdb_xml_create_parser_and_cleanup (_("threads"),
2601 gdb_xml_use_dtd (parser, "threads.dtd");
2603 clear_parsing_context
2604 = make_cleanup (clear_threads_parsing_context, &context);
2606 if (gdb_xml_parse (parser, xml) == 0)
2609 struct thread_item *item;
2611 for (i = 0; VEC_iterate (thread_item_t, context.items, i, item); ++i)
2613 if (!ptid_equal (item->ptid, null_ptid))
2615 struct private_thread_info *info;
2616 /* In non-stop mode, we assume new found threads
2617 are running until proven otherwise with a
2618 stop reply. In all-stop, we can only get
2619 here if all threads are stopped. */
2620 int running = non_stop ? 1 : 0;
2622 remote_notice_new_inferior (item->ptid, running);
2624 info = demand_private_info (item->ptid);
2625 info->core = item->core;
2626 info->extra = item->extra;
2632 do_cleanups (clear_parsing_context);
2635 do_cleanups (back_to);
2640 if (use_threadinfo_query)
2642 putpkt ("qfThreadInfo");
2643 getpkt (&rs->buf, &rs->buf_size, 0);
2645 if (bufp[0] != '\0') /* q packet recognized */
2647 while (*bufp++ == 'm') /* reply contains one or more TID */
2651 new_thread = read_ptid (bufp, &bufp);
2652 if (!ptid_equal (new_thread, null_ptid))
2654 /* In non-stop mode, we assume new found threads
2655 are running until proven otherwise with a
2656 stop reply. In all-stop, we can only get
2657 here if all threads are stopped. */
2658 int running = non_stop ? 1 : 0;
2660 remote_notice_new_inferior (new_thread, running);
2663 while (*bufp++ == ','); /* comma-separated list */
2664 putpkt ("qsThreadInfo");
2665 getpkt (&rs->buf, &rs->buf_size, 0);
2672 /* Only qfThreadInfo is supported in non-stop mode. */
2676 /* Else fall back to old method based on jmetzler protocol. */
2677 use_threadinfo_query = 0;
2678 remote_find_new_threads ();
2683 * Collect a descriptive string about the given thread.
2684 * The target may say anything it wants to about the thread
2685 * (typically info about its blocked / runnable state, name, etc.).
2686 * This string will appear in the info threads display.
2688 * Optional: targets are not required to implement this function.
2692 remote_threads_extra_info (struct thread_info *tp)
2694 struct remote_state *rs = get_remote_state ();
2698 struct gdb_ext_thread_info threadinfo;
2699 static char display_buf[100]; /* arbitrary... */
2700 int n = 0; /* position in display_buf */
2702 if (remote_desc == 0) /* paranoia */
2703 internal_error (__FILE__, __LINE__,
2704 _("remote_threads_extra_info"));
2706 if (ptid_equal (tp->ptid, magic_null_ptid)
2707 || (ptid_get_pid (tp->ptid) != 0 && ptid_get_tid (tp->ptid) == 0))
2708 /* This is the main thread which was added by GDB. The remote
2709 server doesn't know about it. */
2712 if (remote_protocol_packets[PACKET_qXfer_threads].support == PACKET_ENABLE)
2714 struct thread_info *info = find_thread_ptid (tp->ptid);
2716 if (info && info->private)
2717 return info->private->extra;
2722 if (use_threadextra_query)
2725 char *endb = rs->buf + get_remote_packet_size ();
2727 xsnprintf (b, endb - b, "qThreadExtraInfo,");
2729 write_ptid (b, endb, tp->ptid);
2732 getpkt (&rs->buf, &rs->buf_size, 0);
2733 if (rs->buf[0] != 0)
2735 n = min (strlen (rs->buf) / 2, sizeof (display_buf));
2736 result = hex2bin (rs->buf, (gdb_byte *) display_buf, n);
2737 display_buf [result] = '\0';
2742 /* If the above query fails, fall back to the old method. */
2743 use_threadextra_query = 0;
2744 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
2745 | TAG_MOREDISPLAY | TAG_DISPLAY;
2746 int_to_threadref (&id, ptid_get_tid (tp->ptid));
2747 if (remote_get_threadinfo (&id, set, &threadinfo))
2748 if (threadinfo.active)
2750 if (*threadinfo.shortname)
2751 n += xsnprintf (&display_buf[0], sizeof (display_buf) - n,
2752 " Name: %s,", threadinfo.shortname);
2753 if (*threadinfo.display)
2754 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
2755 " State: %s,", threadinfo.display);
2756 if (*threadinfo.more_display)
2757 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
2758 " Priority: %s", threadinfo.more_display);
2762 /* For purely cosmetic reasons, clear up trailing commas. */
2763 if (',' == display_buf[n-1])
2764 display_buf[n-1] = ' ';
2772 /* Implement the to_get_ada_task_ptid function for the remote targets. */
2775 remote_get_ada_task_ptid (long lwp, long thread)
2777 return ptid_build (ptid_get_pid (inferior_ptid), 0, lwp);
2781 /* Restart the remote side; this is an extended protocol operation. */
2784 extended_remote_restart (void)
2786 struct remote_state *rs = get_remote_state ();
2788 /* Send the restart command; for reasons I don't understand the
2789 remote side really expects a number after the "R". */
2790 xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0);
2793 remote_fileio_reset ();
2796 /* Clean up connection to a remote debugger. */
2799 remote_close (int quitting)
2801 if (remote_desc == NULL)
2802 return; /* already closed */
2804 /* Make sure we leave stdin registered in the event loop, and we
2805 don't leave the async SIGINT signal handler installed. */
2806 remote_terminal_ours ();
2808 serial_close (remote_desc);
2811 /* We don't have a connection to the remote stub anymore. Get rid
2812 of all the inferiors and their threads we were controlling. */
2813 discard_all_inferiors ();
2815 /* We're no longer interested in any of these events. */
2816 discard_pending_stop_replies (-1);
2818 if (remote_async_inferior_event_token)
2819 delete_async_event_handler (&remote_async_inferior_event_token);
2820 if (remote_async_get_pending_events_token)
2821 delete_async_event_handler (&remote_async_get_pending_events_token);
2824 /* Query the remote side for the text, data and bss offsets. */
2829 struct remote_state *rs = get_remote_state ();
2832 int lose, num_segments = 0, do_sections, do_segments;
2833 CORE_ADDR text_addr, data_addr, bss_addr, segments[2];
2834 struct section_offsets *offs;
2835 struct symfile_segment_data *data;
2837 if (symfile_objfile == NULL)
2840 putpkt ("qOffsets");
2841 getpkt (&rs->buf, &rs->buf_size, 0);
2844 if (buf[0] == '\000')
2845 return; /* Return silently. Stub doesn't support
2849 warning (_("Remote failure reply: %s"), buf);
2853 /* Pick up each field in turn. This used to be done with scanf, but
2854 scanf will make trouble if CORE_ADDR size doesn't match
2855 conversion directives correctly. The following code will work
2856 with any size of CORE_ADDR. */
2857 text_addr = data_addr = bss_addr = 0;
2861 if (strncmp (ptr, "Text=", 5) == 0)
2864 /* Don't use strtol, could lose on big values. */
2865 while (*ptr && *ptr != ';')
2866 text_addr = (text_addr << 4) + fromhex (*ptr++);
2868 if (strncmp (ptr, ";Data=", 6) == 0)
2871 while (*ptr && *ptr != ';')
2872 data_addr = (data_addr << 4) + fromhex (*ptr++);
2877 if (!lose && strncmp (ptr, ";Bss=", 5) == 0)
2880 while (*ptr && *ptr != ';')
2881 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
2883 if (bss_addr != data_addr)
2884 warning (_("Target reported unsupported offsets: %s"), buf);
2889 else if (strncmp (ptr, "TextSeg=", 8) == 0)
2892 /* Don't use strtol, could lose on big values. */
2893 while (*ptr && *ptr != ';')
2894 text_addr = (text_addr << 4) + fromhex (*ptr++);
2897 if (strncmp (ptr, ";DataSeg=", 9) == 0)
2900 while (*ptr && *ptr != ';')
2901 data_addr = (data_addr << 4) + fromhex (*ptr++);
2909 error (_("Malformed response to offset query, %s"), buf);
2910 else if (*ptr != '\0')
2911 warning (_("Target reported unsupported offsets: %s"), buf);
2913 offs = ((struct section_offsets *)
2914 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
2915 memcpy (offs, symfile_objfile->section_offsets,
2916 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
2918 data = get_symfile_segment_data (symfile_objfile->obfd);
2919 do_segments = (data != NULL);
2920 do_sections = num_segments == 0;
2922 if (num_segments > 0)
2924 segments[0] = text_addr;
2925 segments[1] = data_addr;
2927 /* If we have two segments, we can still try to relocate everything
2928 by assuming that the .text and .data offsets apply to the whole
2929 text and data segments. Convert the offsets given in the packet
2930 to base addresses for symfile_map_offsets_to_segments. */
2931 else if (data && data->num_segments == 2)
2933 segments[0] = data->segment_bases[0] + text_addr;
2934 segments[1] = data->segment_bases[1] + data_addr;
2937 /* If the object file has only one segment, assume that it is text
2938 rather than data; main programs with no writable data are rare,
2939 but programs with no code are useless. Of course the code might
2940 have ended up in the data segment... to detect that we would need
2941 the permissions here. */
2942 else if (data && data->num_segments == 1)
2944 segments[0] = data->segment_bases[0] + text_addr;
2947 /* There's no way to relocate by segment. */
2953 int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data,
2954 offs, num_segments, segments);
2956 if (ret == 0 && !do_sections)
2957 error (_("Can not handle qOffsets TextSeg response with this symbol file"));
2964 free_symfile_segment_data (data);
2968 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
2970 /* This is a temporary kludge to force data and bss to use the same offsets
2971 because that's what nlmconv does now. The real solution requires changes
2972 to the stub and remote.c that I don't have time to do right now. */
2974 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
2975 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
2978 objfile_relocate (symfile_objfile, offs);
2981 /* Callback for iterate_over_threads. Set the STOP_REQUESTED flags in
2982 threads we know are stopped already. This is used during the
2983 initial remote connection in non-stop mode --- threads that are
2984 reported as already being stopped are left stopped. */
2987 set_stop_requested_callback (struct thread_info *thread, void *data)
2989 /* If we have a stop reply for this thread, it must be stopped. */
2990 if (peek_stop_reply (thread->ptid))
2991 set_stop_requested (thread->ptid, 1);
2996 /* Stub for catch_exception. */
2998 struct start_remote_args
3002 /* The current target. */
3003 struct target_ops *target;
3005 /* Non-zero if this is an extended-remote target. */
3009 /* Send interrupt_sequence to remote target. */
3011 send_interrupt_sequence ()
3013 if (interrupt_sequence_mode == interrupt_sequence_control_c)
3014 serial_write (remote_desc, "\x03", 1);
3015 else if (interrupt_sequence_mode == interrupt_sequence_break)
3016 serial_send_break (remote_desc);
3017 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
3019 serial_send_break (remote_desc);
3020 serial_write (remote_desc, "g", 1);
3023 internal_error (__FILE__, __LINE__,
3024 _("Invalid value for interrupt_sequence_mode: %s."),
3025 interrupt_sequence_mode);
3029 remote_start_remote (struct ui_out *uiout, void *opaque)
3031 struct start_remote_args *args = opaque;
3032 struct remote_state *rs = get_remote_state ();
3033 struct packet_config *noack_config;
3034 char *wait_status = NULL;
3036 immediate_quit++; /* Allow user to interrupt it. */
3038 /* Ack any packet which the remote side has already sent. */
3039 serial_write (remote_desc, "+", 1);
3041 if (interrupt_on_connect)
3042 send_interrupt_sequence ();
3044 /* The first packet we send to the target is the optional "supported
3045 packets" request. If the target can answer this, it will tell us
3046 which later probes to skip. */
3047 remote_query_supported ();
3049 /* Next, we possibly activate noack mode.
3051 If the QStartNoAckMode packet configuration is set to AUTO,
3052 enable noack mode if the stub reported a wish for it with
3055 If set to TRUE, then enable noack mode even if the stub didn't
3056 report it in qSupported. If the stub doesn't reply OK, the
3057 session ends with an error.
3059 If FALSE, then don't activate noack mode, regardless of what the
3060 stub claimed should be the default with qSupported. */
3062 noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode];
3064 if (noack_config->detect == AUTO_BOOLEAN_TRUE
3065 || (noack_config->detect == AUTO_BOOLEAN_AUTO
3066 && noack_config->support == PACKET_ENABLE))
3068 putpkt ("QStartNoAckMode");
3069 getpkt (&rs->buf, &rs->buf_size, 0);
3070 if (packet_ok (rs->buf, noack_config) == PACKET_OK)
3074 if (args->extended_p)
3076 /* Tell the remote that we are using the extended protocol. */
3078 getpkt (&rs->buf, &rs->buf_size, 0);
3081 /* Next, if the target can specify a description, read it. We do
3082 this before anything involving memory or registers. */
3083 target_find_description ();
3085 /* Next, now that we know something about the target, update the
3086 address spaces in the program spaces. */
3087 update_address_spaces ();
3089 /* On OSs where the list of libraries is global to all
3090 processes, we fetch them early. */
3091 if (gdbarch_has_global_solist (target_gdbarch))
3092 solib_add (NULL, args->from_tty, args->target, auto_solib_add);
3096 if (!rs->non_stop_aware)
3097 error (_("Non-stop mode requested, but remote does not support non-stop"));
3099 putpkt ("QNonStop:1");
3100 getpkt (&rs->buf, &rs->buf_size, 0);
3102 if (strcmp (rs->buf, "OK") != 0)
3103 error ("Remote refused setting non-stop mode with: %s", rs->buf);
3105 /* Find about threads and processes the stub is already
3106 controlling. We default to adding them in the running state.
3107 The '?' query below will then tell us about which threads are
3109 remote_threads_info (args->target);
3111 else if (rs->non_stop_aware)
3113 /* Don't assume that the stub can operate in all-stop mode.
3114 Request it explicitely. */
3115 putpkt ("QNonStop:0");
3116 getpkt (&rs->buf, &rs->buf_size, 0);
3118 if (strcmp (rs->buf, "OK") != 0)
3119 error ("Remote refused setting all-stop mode with: %s", rs->buf);
3122 /* Check whether the target is running now. */
3124 getpkt (&rs->buf, &rs->buf_size, 0);
3128 if (rs->buf[0] == 'W' || rs->buf[0] == 'X')
3130 if (!args->extended_p)
3131 error (_("The target is not running (try extended-remote?)"));
3133 /* We're connected, but not running. Drop out before we
3134 call start_remote. */
3139 /* Save the reply for later. */
3140 wait_status = alloca (strlen (rs->buf) + 1);
3141 strcpy (wait_status, rs->buf);
3144 /* Let the stub know that we want it to return the thread. */
3145 set_continue_thread (minus_one_ptid);
3147 /* Without this, some commands which require an active target
3148 (such as kill) won't work. This variable serves (at least)
3149 double duty as both the pid of the target process (if it has
3150 such), and as a flag indicating that a target is active.
3151 These functions should be split out into seperate variables,
3152 especially since GDB will someday have a notion of debugging
3153 several processes. */
3154 inferior_ptid = magic_null_ptid;
3156 /* Now, if we have thread information, update inferior_ptid. */
3157 inferior_ptid = remote_current_thread (inferior_ptid);
3159 remote_add_inferior (ptid_get_pid (inferior_ptid), -1);
3161 /* Always add the main thread. */
3162 add_thread_silent (inferior_ptid);
3164 get_offsets (); /* Get text, data & bss offsets. */
3166 /* If we could not find a description using qXfer, and we know
3167 how to do it some other way, try again. This is not
3168 supported for non-stop; it could be, but it is tricky if
3169 there are no stopped threads when we connect. */
3170 if (remote_read_description_p (args->target)
3171 && gdbarch_target_desc (target_gdbarch) == NULL)
3173 target_clear_description ();
3174 target_find_description ();
3177 /* Use the previously fetched status. */
3178 gdb_assert (wait_status != NULL);
3179 strcpy (rs->buf, wait_status);
3180 rs->cached_wait_status = 1;
3183 start_remote (args->from_tty); /* Initialize gdb process mechanisms. */
3187 /* Clear WFI global state. Do this before finding about new
3188 threads and inferiors, and setting the current inferior.
3189 Otherwise we would clear the proceed status of the current
3190 inferior when we want its stop_soon state to be preserved
3191 (see notice_new_inferior). */
3192 init_wait_for_inferior ();
3194 /* In non-stop, we will either get an "OK", meaning that there
3195 are no stopped threads at this time; or, a regular stop
3196 reply. In the latter case, there may be more than one thread
3197 stopped --- we pull them all out using the vStopped
3199 if (strcmp (rs->buf, "OK") != 0)
3201 struct stop_reply *stop_reply;
3202 struct cleanup *old_chain;
3204 stop_reply = stop_reply_xmalloc ();
3205 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
3207 remote_parse_stop_reply (rs->buf, stop_reply);
3208 discard_cleanups (old_chain);
3210 /* get_pending_stop_replies acks this one, and gets the rest
3212 pending_stop_reply = stop_reply;
3213 remote_get_pending_stop_replies ();
3215 /* Make sure that threads that were stopped remain
3217 iterate_over_threads (set_stop_requested_callback, NULL);
3220 if (target_can_async_p ())
3221 target_async (inferior_event_handler, 0);
3223 if (thread_count () == 0)
3225 if (!args->extended_p)
3226 error (_("The target is not running (try extended-remote?)"));
3228 /* We're connected, but not running. Drop out before we
3229 call start_remote. */
3233 /* Let the stub know that we want it to return the thread. */
3235 /* Force the stub to choose a thread. */
3236 set_general_thread (null_ptid);
3239 inferior_ptid = remote_current_thread (minus_one_ptid);
3240 if (ptid_equal (inferior_ptid, minus_one_ptid))
3241 error (_("remote didn't report the current thread in non-stop mode"));
3243 get_offsets (); /* Get text, data & bss offsets. */
3245 /* In non-stop mode, any cached wait status will be stored in
3246 the stop reply queue. */
3247 gdb_assert (wait_status == NULL);
3249 /* Update the remote on signals to silently pass, or more
3250 importantly, which to not ignore, in case a previous session
3251 had set some different set of signals to be ignored. */
3252 remote_pass_signals ();
3255 /* If we connected to a live target, do some additional setup. */
3256 if (target_has_execution)
3258 if (exec_bfd) /* No use without an exec file. */
3259 remote_check_symbols (symfile_objfile);
3262 /* Possibly the target has been engaged in a trace run started
3263 previously; find out where things are at. */
3264 if (remote_get_trace_status (current_trace_status ()) != -1)
3266 struct uploaded_tp *uploaded_tps = NULL;
3267 struct uploaded_tsv *uploaded_tsvs = NULL;
3269 if (current_trace_status ()->running)
3270 printf_filtered (_("Trace is already running on the target.\n"));
3272 /* Get trace state variables first, they may be checked when
3273 parsing uploaded commands. */
3275 remote_upload_trace_state_variables (&uploaded_tsvs);
3277 merge_uploaded_trace_state_variables (&uploaded_tsvs);
3279 remote_upload_tracepoints (&uploaded_tps);
3281 merge_uploaded_tracepoints (&uploaded_tps);
3284 /* If breakpoints are global, insert them now. */
3285 if (gdbarch_has_global_breakpoints (target_gdbarch)
3286 && breakpoints_always_inserted_mode ())
3287 insert_breakpoints ();
3290 /* Open a connection to a remote debugger.
3291 NAME is the filename used for communication. */
3294 remote_open (char *name, int from_tty)
3296 remote_open_1 (name, from_tty, &remote_ops, 0);
3299 /* Open a connection to a remote debugger using the extended
3300 remote gdb protocol. NAME is the filename used for communication. */
3303 extended_remote_open (char *name, int from_tty)
3305 remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */);
3308 /* Generic code for opening a connection to a remote target. */
3311 init_all_packet_configs (void)
3315 for (i = 0; i < PACKET_MAX; i++)
3316 update_packet_config (&remote_protocol_packets[i]);
3319 /* Symbol look-up. */
3322 remote_check_symbols (struct objfile *objfile)
3324 struct remote_state *rs = get_remote_state ();
3325 char *msg, *reply, *tmp;
3326 struct minimal_symbol *sym;
3329 if (remote_protocol_packets[PACKET_qSymbol].support == PACKET_DISABLE)
3332 /* Make sure the remote is pointing at the right process. */
3333 set_general_process ();
3335 /* Allocate a message buffer. We can't reuse the input buffer in RS,
3336 because we need both at the same time. */
3337 msg = alloca (get_remote_packet_size ());
3339 /* Invite target to request symbol lookups. */
3341 putpkt ("qSymbol::");
3342 getpkt (&rs->buf, &rs->buf_size, 0);
3343 packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSymbol]);
3346 while (strncmp (reply, "qSymbol:", 8) == 0)
3349 end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2);
3351 sym = lookup_minimal_symbol (msg, NULL, NULL);
3353 xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]);
3356 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
3357 CORE_ADDR sym_addr = SYMBOL_VALUE_ADDRESS (sym);
3359 /* If this is a function address, return the start of code
3360 instead of any data function descriptor. */
3361 sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch,
3365 xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s",
3366 phex_nz (sym_addr, addr_size), &reply[8]);
3370 getpkt (&rs->buf, &rs->buf_size, 0);
3375 static struct serial *
3376 remote_serial_open (char *name)
3378 static int udp_warning = 0;
3380 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
3381 of in ser-tcp.c, because it is the remote protocol assuming that the
3382 serial connection is reliable and not the serial connection promising
3384 if (!udp_warning && strncmp (name, "udp:", 4) == 0)
3387 The remote protocol may be unreliable over UDP.\n\
3388 Some events may be lost, rendering further debugging impossible."));
3392 return serial_open (name);
3395 /* This type describes each known response to the qSupported
3397 struct protocol_feature
3399 /* The name of this protocol feature. */
3402 /* The default for this protocol feature. */
3403 enum packet_support default_support;
3405 /* The function to call when this feature is reported, or after
3406 qSupported processing if the feature is not supported.
3407 The first argument points to this structure. The second
3408 argument indicates whether the packet requested support be
3409 enabled, disabled, or probed (or the default, if this function
3410 is being called at the end of processing and this feature was
3411 not reported). The third argument may be NULL; if not NULL, it
3412 is a NUL-terminated string taken from the packet following
3413 this feature's name and an equals sign. */
3414 void (*func) (const struct protocol_feature *, enum packet_support,
3417 /* The corresponding packet for this feature. Only used if
3418 FUNC is remote_supported_packet. */
3423 remote_supported_packet (const struct protocol_feature *feature,
3424 enum packet_support support,
3425 const char *argument)
3429 warning (_("Remote qSupported response supplied an unexpected value for"
3430 " \"%s\"."), feature->name);
3434 if (remote_protocol_packets[feature->packet].support
3435 == PACKET_SUPPORT_UNKNOWN)
3436 remote_protocol_packets[feature->packet].support = support;
3440 remote_packet_size (const struct protocol_feature *feature,
3441 enum packet_support support, const char *value)
3443 struct remote_state *rs = get_remote_state ();
3448 if (support != PACKET_ENABLE)
3451 if (value == NULL || *value == '\0')
3453 warning (_("Remote target reported \"%s\" without a size."),
3459 packet_size = strtol (value, &value_end, 16);
3460 if (errno != 0 || *value_end != '\0' || packet_size < 0)
3462 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
3463 feature->name, value);
3467 if (packet_size > MAX_REMOTE_PACKET_SIZE)
3469 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
3470 packet_size, MAX_REMOTE_PACKET_SIZE);
3471 packet_size = MAX_REMOTE_PACKET_SIZE;
3474 /* Record the new maximum packet size. */
3475 rs->explicit_packet_size = packet_size;
3479 remote_multi_process_feature (const struct protocol_feature *feature,
3480 enum packet_support support, const char *value)
3482 struct remote_state *rs = get_remote_state ();
3484 rs->multi_process_aware = (support == PACKET_ENABLE);
3488 remote_non_stop_feature (const struct protocol_feature *feature,
3489 enum packet_support support, const char *value)
3491 struct remote_state *rs = get_remote_state ();
3493 rs->non_stop_aware = (support == PACKET_ENABLE);
3497 remote_cond_tracepoint_feature (const struct protocol_feature *feature,
3498 enum packet_support support,
3501 struct remote_state *rs = get_remote_state ();
3503 rs->cond_tracepoints = (support == PACKET_ENABLE);
3507 remote_fast_tracepoint_feature (const struct protocol_feature *feature,
3508 enum packet_support support,
3511 struct remote_state *rs = get_remote_state ();
3513 rs->fast_tracepoints = (support == PACKET_ENABLE);
3517 remote_disconnected_tracing_feature (const struct protocol_feature *feature,
3518 enum packet_support support,
3521 struct remote_state *rs = get_remote_state ();
3523 rs->disconnected_tracing = (support == PACKET_ENABLE);
3526 static struct protocol_feature remote_protocol_features[] = {
3527 { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
3528 { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
3529 PACKET_qXfer_auxv },
3530 { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet,
3531 PACKET_qXfer_features },
3532 { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet,
3533 PACKET_qXfer_libraries },
3534 { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet,
3535 PACKET_qXfer_memory_map },
3536 { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet,
3537 PACKET_qXfer_spu_read },
3538 { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet,
3539 PACKET_qXfer_spu_write },
3540 { "qXfer:osdata:read", PACKET_DISABLE, remote_supported_packet,
3541 PACKET_qXfer_osdata },
3542 { "qXfer:threads:read", PACKET_DISABLE, remote_supported_packet,
3543 PACKET_qXfer_threads },
3544 { "QPassSignals", PACKET_DISABLE, remote_supported_packet,
3545 PACKET_QPassSignals },
3546 { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet,
3547 PACKET_QStartNoAckMode },
3548 { "multiprocess", PACKET_DISABLE, remote_multi_process_feature, -1 },
3549 { "QNonStop", PACKET_DISABLE, remote_non_stop_feature, -1 },
3550 { "qXfer:siginfo:read", PACKET_DISABLE, remote_supported_packet,
3551 PACKET_qXfer_siginfo_read },
3552 { "qXfer:siginfo:write", PACKET_DISABLE, remote_supported_packet,
3553 PACKET_qXfer_siginfo_write },
3554 { "ConditionalTracepoints", PACKET_DISABLE, remote_cond_tracepoint_feature,
3555 PACKET_ConditionalTracepoints },
3556 { "FastTracepoints", PACKET_DISABLE, remote_fast_tracepoint_feature,
3557 PACKET_FastTracepoints },
3558 { "DisconnectedTracing", PACKET_DISABLE, remote_disconnected_tracing_feature,
3560 { "ReverseContinue", PACKET_DISABLE, remote_supported_packet,
3562 { "ReverseStep", PACKET_DISABLE, remote_supported_packet,
3564 { "TracepointSource", PACKET_DISABLE, remote_supported_packet,
3565 PACKET_TracepointSource },
3568 static char *remote_support_xml;
3570 /* Register string appended to "xmlRegisters=" in qSupported query. */
3573 register_remote_support_xml (const char *xml)
3575 #if defined(HAVE_LIBEXPAT)
3576 if (remote_support_xml == NULL)
3577 remote_support_xml = concat ("xmlRegisters=", xml, (char *) NULL);
3580 char *copy = xstrdup (remote_support_xml + 13);
3581 char *p = strtok (copy, ",");
3585 if (strcmp (p, xml) == 0)
3592 while ((p = strtok (NULL, ",")) != NULL);
3595 remote_support_xml = reconcat (remote_support_xml,
3596 remote_support_xml, ",", xml,
3603 remote_query_supported_append (char *msg, const char *append)
3606 return reconcat (msg, msg, ";", append, (char *) NULL);
3608 return xstrdup (append);
3612 remote_query_supported (void)
3614 struct remote_state *rs = get_remote_state ();
3617 unsigned char seen [ARRAY_SIZE (remote_protocol_features)];
3619 /* The packet support flags are handled differently for this packet
3620 than for most others. We treat an error, a disabled packet, and
3621 an empty response identically: any features which must be reported
3622 to be used will be automatically disabled. An empty buffer
3623 accomplishes this, since that is also the representation for a list
3624 containing no features. */
3627 if (remote_protocol_packets[PACKET_qSupported].support != PACKET_DISABLE)
3630 struct cleanup *old_chain = make_cleanup (free_current_contents, &q);
3633 q = remote_query_supported_append (q, "multiprocess+");
3635 if (remote_support_xml)
3636 q = remote_query_supported_append (q, remote_support_xml);
3638 q = remote_query_supported_append (q, "qRelocInsn+");
3640 q = reconcat (q, "qSupported:", q, (char *) NULL);
3643 do_cleanups (old_chain);
3645 getpkt (&rs->buf, &rs->buf_size, 0);
3647 /* If an error occured, warn, but do not return - just reset the
3648 buffer to empty and go on to disable features. */
3649 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported])
3652 warning (_("Remote failure reply: %s"), rs->buf);
3657 memset (seen, 0, sizeof (seen));
3662 enum packet_support is_supported;
3663 char *p, *end, *name_end, *value;
3665 /* First separate out this item from the rest of the packet. If
3666 there's another item after this, we overwrite the separator
3667 (terminated strings are much easier to work with). */
3669 end = strchr (p, ';');
3672 end = p + strlen (p);
3682 warning (_("empty item in \"qSupported\" response"));
3687 name_end = strchr (p, '=');
3690 /* This is a name=value entry. */
3691 is_supported = PACKET_ENABLE;
3692 value = name_end + 1;
3701 is_supported = PACKET_ENABLE;
3705 is_supported = PACKET_DISABLE;
3709 is_supported = PACKET_SUPPORT_UNKNOWN;
3713 warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p);
3719 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
3720 if (strcmp (remote_protocol_features[i].name, p) == 0)
3722 const struct protocol_feature *feature;
3725 feature = &remote_protocol_features[i];
3726 feature->func (feature, is_supported, value);
3731 /* If we increased the packet size, make sure to increase the global
3732 buffer size also. We delay this until after parsing the entire
3733 qSupported packet, because this is the same buffer we were
3735 if (rs->buf_size < rs->explicit_packet_size)
3737 rs->buf_size = rs->explicit_packet_size;
3738 rs->buf = xrealloc (rs->buf, rs->buf_size);
3741 /* Handle the defaults for unmentioned features. */
3742 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
3745 const struct protocol_feature *feature;
3747 feature = &remote_protocol_features[i];
3748 feature->func (feature, feature->default_support, NULL);
3754 remote_open_1 (char *name, int from_tty, struct target_ops *target, int extended_p)
3756 struct remote_state *rs = get_remote_state ();
3759 error (_("To open a remote debug connection, you need to specify what\n"
3760 "serial device is attached to the remote system\n"
3761 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
3763 /* See FIXME above. */
3764 if (!target_async_permitted)
3765 wait_forever_enabled_p = 1;
3767 /* If we're connected to a running target, target_preopen will kill it.
3768 But if we're connected to a target system with no running process,
3769 then we will still be connected when it returns. Ask this question
3770 first, before target_preopen has a chance to kill anything. */
3771 if (remote_desc != NULL && !have_inferiors ())
3774 || query (_("Already connected to a remote target. Disconnect? ")))
3777 error (_("Still connected."));
3780 target_preopen (from_tty);
3782 unpush_target (target);
3784 /* This time without a query. If we were connected to an
3785 extended-remote target and target_preopen killed the running
3786 process, we may still be connected. If we are starting "target
3787 remote" now, the extended-remote target will not have been
3788 removed by unpush_target. */
3789 if (remote_desc != NULL && !have_inferiors ())
3792 /* Make sure we send the passed signals list the next time we resume. */
3793 xfree (last_pass_packet);
3794 last_pass_packet = NULL;
3796 remote_fileio_reset ();
3797 reopen_exec_file ();
3800 remote_desc = remote_serial_open (name);
3802 perror_with_name (name);
3804 if (baud_rate != -1)
3806 if (serial_setbaudrate (remote_desc, baud_rate))
3808 /* The requested speed could not be set. Error out to
3809 top level after closing remote_desc. Take care to
3810 set remote_desc to NULL to avoid closing remote_desc
3812 serial_close (remote_desc);
3814 perror_with_name (name);
3818 serial_raw (remote_desc);
3820 /* If there is something sitting in the buffer we might take it as a
3821 response to a command, which would be bad. */
3822 serial_flush_input (remote_desc);
3826 puts_filtered ("Remote debugging using ");
3827 puts_filtered (name);
3828 puts_filtered ("\n");
3830 push_target (target); /* Switch to using remote target now. */
3832 /* Register extra event sources in the event loop. */
3833 remote_async_inferior_event_token
3834 = create_async_event_handler (remote_async_inferior_event_handler,
3836 remote_async_get_pending_events_token
3837 = create_async_event_handler (remote_async_get_pending_events_handler,
3840 /* Reset the target state; these things will be queried either by
3841 remote_query_supported or as they are needed. */
3842 init_all_packet_configs ();
3843 rs->cached_wait_status = 0;
3844 rs->explicit_packet_size = 0;
3846 rs->multi_process_aware = 0;
3847 rs->extended = extended_p;
3848 rs->non_stop_aware = 0;
3849 rs->waiting_for_stop_reply = 0;
3850 rs->ctrlc_pending_p = 0;
3852 general_thread = not_sent_ptid;
3853 continue_thread = not_sent_ptid;
3855 /* Probe for ability to use "ThreadInfo" query, as required. */
3856 use_threadinfo_query = 1;
3857 use_threadextra_query = 1;
3859 if (target_async_permitted)
3861 /* With this target we start out by owning the terminal. */
3862 remote_async_terminal_ours_p = 1;
3864 /* FIXME: cagney/1999-09-23: During the initial connection it is
3865 assumed that the target is already ready and able to respond to
3866 requests. Unfortunately remote_start_remote() eventually calls
3867 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
3868 around this. Eventually a mechanism that allows
3869 wait_for_inferior() to expect/get timeouts will be
3871 wait_forever_enabled_p = 0;
3874 /* First delete any symbols previously loaded from shared libraries. */
3875 no_shared_libraries (NULL, 0);
3878 init_thread_list ();
3880 /* Start the remote connection. If error() or QUIT, discard this
3881 target (we'd otherwise be in an inconsistent state) and then
3882 propogate the error on up the exception chain. This ensures that
3883 the caller doesn't stumble along blindly assuming that the
3884 function succeeded. The CLI doesn't have this problem but other
3885 UI's, such as MI do.
3887 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
3888 this function should return an error indication letting the
3889 caller restore the previous state. Unfortunately the command
3890 ``target remote'' is directly wired to this function making that
3891 impossible. On a positive note, the CLI side of this problem has
3892 been fixed - the function set_cmd_context() makes it possible for
3893 all the ``target ....'' commands to share a common callback
3894 function. See cli-dump.c. */
3896 struct gdb_exception ex;
3897 struct start_remote_args args;
3899 args.from_tty = from_tty;
3900 args.target = target;
3901 args.extended_p = extended_p;
3903 ex = catch_exception (uiout, remote_start_remote, &args, RETURN_MASK_ALL);
3906 /* Pop the partially set up target - unless something else did
3907 already before throwing the exception. */
3908 if (remote_desc != NULL)
3910 if (target_async_permitted)
3911 wait_forever_enabled_p = 1;
3912 throw_exception (ex);
3916 if (target_async_permitted)
3917 wait_forever_enabled_p = 1;
3920 /* This takes a program previously attached to and detaches it. After
3921 this is done, GDB can be used to debug some other program. We
3922 better not have left any breakpoints in the target program or it'll
3923 die when it hits one. */
3926 remote_detach_1 (char *args, int from_tty, int extended)
3928 int pid = ptid_get_pid (inferior_ptid);
3929 struct remote_state *rs = get_remote_state ();
3932 error (_("Argument given to \"detach\" when remotely debugging."));
3934 if (!target_has_execution)
3935 error (_("No process to detach from."));
3937 /* Tell the remote target to detach. */
3938 if (remote_multi_process_p (rs))
3939 sprintf (rs->buf, "D;%x", pid);
3941 strcpy (rs->buf, "D");
3944 getpkt (&rs->buf, &rs->buf_size, 0);
3946 if (rs->buf[0] == 'O' && rs->buf[1] == 'K')
3948 else if (rs->buf[0] == '\0')
3949 error (_("Remote doesn't know how to detach"));
3951 error (_("Can't detach process."));
3955 if (remote_multi_process_p (rs))
3956 printf_filtered (_("Detached from remote %s.\n"),
3957 target_pid_to_str (pid_to_ptid (pid)));
3961 puts_filtered (_("Detached from remote process.\n"));
3963 puts_filtered (_("Ending remote debugging.\n"));
3967 discard_pending_stop_replies (pid);
3968 target_mourn_inferior ();
3972 remote_detach (struct target_ops *ops, char *args, int from_tty)
3974 remote_detach_1 (args, from_tty, 0);
3978 extended_remote_detach (struct target_ops *ops, char *args, int from_tty)
3980 remote_detach_1 (args, from_tty, 1);
3983 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
3986 remote_disconnect (struct target_ops *target, char *args, int from_tty)
3989 error (_("Argument given to \"disconnect\" when remotely debugging."));
3991 /* Make sure we unpush even the extended remote targets; mourn
3992 won't do it. So call remote_mourn_1 directly instead of
3993 target_mourn_inferior. */
3994 remote_mourn_1 (target);
3997 puts_filtered ("Ending remote debugging.\n");
4000 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
4001 be chatty about it. */
4004 extended_remote_attach_1 (struct target_ops *target, char *args, int from_tty)
4006 struct remote_state *rs = get_remote_state ();
4008 char *wait_status = NULL;
4010 pid = parse_pid_to_attach (args);
4012 /* Remote PID can be freely equal to getpid, do not check it here the same
4013 way as in other targets. */
4015 if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE)
4016 error (_("This target does not support attaching to a process"));
4018 sprintf (rs->buf, "vAttach;%x", pid);
4020 getpkt (&rs->buf, &rs->buf_size, 0);
4022 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vAttach]) == PACKET_OK)
4025 printf_unfiltered (_("Attached to %s\n"),
4026 target_pid_to_str (pid_to_ptid (pid)));
4030 /* Save the reply for later. */
4031 wait_status = alloca (strlen (rs->buf) + 1);
4032 strcpy (wait_status, rs->buf);
4034 else if (strcmp (rs->buf, "OK") != 0)
4035 error (_("Attaching to %s failed with: %s"),
4036 target_pid_to_str (pid_to_ptid (pid)),
4039 else if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE)
4040 error (_("This target does not support attaching to a process"));
4042 error (_("Attaching to %s failed"),
4043 target_pid_to_str (pid_to_ptid (pid)));
4045 set_current_inferior (remote_add_inferior (pid, 1));
4047 inferior_ptid = pid_to_ptid (pid);
4051 struct thread_info *thread;
4053 /* Get list of threads. */
4054 remote_threads_info (target);
4056 thread = first_thread_of_process (pid);
4058 inferior_ptid = thread->ptid;
4060 inferior_ptid = pid_to_ptid (pid);
4062 /* Invalidate our notion of the remote current thread. */
4063 record_currthread (minus_one_ptid);
4067 /* Now, if we have thread information, update inferior_ptid. */
4068 inferior_ptid = remote_current_thread (inferior_ptid);
4070 /* Add the main thread to the thread list. */
4071 add_thread_silent (inferior_ptid);
4074 /* Next, if the target can specify a description, read it. We do
4075 this before anything involving memory or registers. */
4076 target_find_description ();
4080 /* Use the previously fetched status. */
4081 gdb_assert (wait_status != NULL);
4083 if (target_can_async_p ())
4085 struct stop_reply *stop_reply;
4086 struct cleanup *old_chain;
4088 stop_reply = stop_reply_xmalloc ();
4089 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
4090 remote_parse_stop_reply (wait_status, stop_reply);
4091 discard_cleanups (old_chain);
4092 push_stop_reply (stop_reply);
4094 target_async (inferior_event_handler, 0);
4098 gdb_assert (wait_status != NULL);
4099 strcpy (rs->buf, wait_status);
4100 rs->cached_wait_status = 1;
4104 gdb_assert (wait_status == NULL);
4108 extended_remote_attach (struct target_ops *ops, char *args, int from_tty)
4110 extended_remote_attach_1 (ops, args, from_tty);
4113 /* Convert hex digit A to a number. */
4118 if (a >= '0' && a <= '9')
4120 else if (a >= 'a' && a <= 'f')
4121 return a - 'a' + 10;
4122 else if (a >= 'A' && a <= 'F')
4123 return a - 'A' + 10;
4125 error (_("Reply contains invalid hex digit %d"), a);
4129 hex2bin (const char *hex, gdb_byte *bin, int count)
4133 for (i = 0; i < count; i++)
4135 if (hex[0] == 0 || hex[1] == 0)
4137 /* Hex string is short, or of uneven length.
4138 Return the count that has been converted so far. */
4141 *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]);
4147 /* Convert number NIB to a hex digit. */
4155 return 'a' + nib - 10;
4159 bin2hex (const gdb_byte *bin, char *hex, int count)
4163 /* May use a length, or a nul-terminated string as input. */
4165 count = strlen ((char *) bin);
4167 for (i = 0; i < count; i++)
4169 *hex++ = tohex ((*bin >> 4) & 0xf);
4170 *hex++ = tohex (*bin++ & 0xf);
4176 /* Check for the availability of vCont. This function should also check
4180 remote_vcont_probe (struct remote_state *rs)
4184 strcpy (rs->buf, "vCont?");
4186 getpkt (&rs->buf, &rs->buf_size, 0);
4189 /* Make sure that the features we assume are supported. */
4190 if (strncmp (buf, "vCont", 5) == 0)
4193 int support_s, support_S, support_c, support_C;
4199 rs->support_vCont_t = 0;
4200 while (p && *p == ';')
4203 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
4205 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
4207 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
4209 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
4211 else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0))
4212 rs->support_vCont_t = 1;
4214 p = strchr (p, ';');
4217 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
4218 BUF will make packet_ok disable the packet. */
4219 if (!support_s || !support_S || !support_c || !support_C)
4223 packet_ok (buf, &remote_protocol_packets[PACKET_vCont]);
4226 /* Helper function for building "vCont" resumptions. Write a
4227 resumption to P. ENDP points to one-passed-the-end of the buffer
4228 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
4229 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
4230 resumed thread should be single-stepped and/or signalled. If PTID
4231 equals minus_one_ptid, then all threads are resumed; if PTID
4232 represents a process, then all threads of the process are resumed;
4233 the thread to be stepped and/or signalled is given in the global
4237 append_resumption (char *p, char *endp,
4238 ptid_t ptid, int step, enum target_signal siggnal)
4240 struct remote_state *rs = get_remote_state ();
4242 if (step && siggnal != TARGET_SIGNAL_0)
4243 p += xsnprintf (p, endp - p, ";S%02x", siggnal);
4245 p += xsnprintf (p, endp - p, ";s");
4246 else if (siggnal != TARGET_SIGNAL_0)
4247 p += xsnprintf (p, endp - p, ";C%02x", siggnal);
4249 p += xsnprintf (p, endp - p, ";c");
4251 if (remote_multi_process_p (rs) && ptid_is_pid (ptid))
4255 /* All (-1) threads of process. */
4256 nptid = ptid_build (ptid_get_pid (ptid), 0, -1);
4258 p += xsnprintf (p, endp - p, ":");
4259 p = write_ptid (p, endp, nptid);
4261 else if (!ptid_equal (ptid, minus_one_ptid))
4263 p += xsnprintf (p, endp - p, ":");
4264 p = write_ptid (p, endp, ptid);
4270 /* Resume the remote inferior by using a "vCont" packet. The thread
4271 to be resumed is PTID; STEP and SIGGNAL indicate whether the
4272 resumed thread should be single-stepped and/or signalled. If PTID
4273 equals minus_one_ptid, then all threads are resumed; the thread to
4274 be stepped and/or signalled is given in the global INFERIOR_PTID.
4275 This function returns non-zero iff it resumes the inferior.
4277 This function issues a strict subset of all possible vCont commands at the
4281 remote_vcont_resume (ptid_t ptid, int step, enum target_signal siggnal)
4283 struct remote_state *rs = get_remote_state ();
4287 if (remote_protocol_packets[PACKET_vCont].support == PACKET_SUPPORT_UNKNOWN)
4288 remote_vcont_probe (rs);
4290 if (remote_protocol_packets[PACKET_vCont].support == PACKET_DISABLE)
4294 endp = rs->buf + get_remote_packet_size ();
4296 /* If we could generate a wider range of packets, we'd have to worry
4297 about overflowing BUF. Should there be a generic
4298 "multi-part-packet" packet? */
4300 p += xsnprintf (p, endp - p, "vCont");
4302 if (ptid_equal (ptid, magic_null_ptid))
4304 /* MAGIC_NULL_PTID means that we don't have any active threads,
4305 so we don't have any TID numbers the inferior will
4306 understand. Make sure to only send forms that do not specify
4308 p = append_resumption (p, endp, minus_one_ptid, step, siggnal);
4310 else if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid))
4312 /* Resume all threads (of all processes, or of a single
4313 process), with preference for INFERIOR_PTID. This assumes
4314 inferior_ptid belongs to the set of all threads we are about
4316 if (step || siggnal != TARGET_SIGNAL_0)
4318 /* Step inferior_ptid, with or without signal. */
4319 p = append_resumption (p, endp, inferior_ptid, step, siggnal);
4322 /* And continue others without a signal. */
4323 p = append_resumption (p, endp, ptid, /*step=*/ 0, TARGET_SIGNAL_0);
4327 /* Scheduler locking; resume only PTID. */
4328 p = append_resumption (p, endp, ptid, step, siggnal);
4331 gdb_assert (strlen (rs->buf) < get_remote_packet_size ());
4336 /* In non-stop, the stub replies to vCont with "OK". The stop
4337 reply will be reported asynchronously by means of a `%Stop'
4339 getpkt (&rs->buf, &rs->buf_size, 0);
4340 if (strcmp (rs->buf, "OK") != 0)
4341 error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf);
4347 /* Tell the remote machine to resume. */
4349 static enum target_signal last_sent_signal = TARGET_SIGNAL_0;
4351 static int last_sent_step;
4354 remote_resume (struct target_ops *ops,
4355 ptid_t ptid, int step, enum target_signal siggnal)
4357 struct remote_state *rs = get_remote_state ();
4360 last_sent_signal = siggnal;
4361 last_sent_step = step;
4363 /* Update the inferior on signals to silently pass, if they've changed. */
4364 remote_pass_signals ();
4366 /* The vCont packet doesn't need to specify threads via Hc. */
4367 /* No reverse support (yet) for vCont. */
4368 if (execution_direction != EXEC_REVERSE)
4369 if (remote_vcont_resume (ptid, step, siggnal))
4372 /* All other supported resume packets do use Hc, so set the continue
4374 if (ptid_equal (ptid, minus_one_ptid))
4375 set_continue_thread (any_thread_ptid);
4377 set_continue_thread (ptid);
4380 if (execution_direction == EXEC_REVERSE)
4382 /* We don't pass signals to the target in reverse exec mode. */
4383 if (info_verbose && siggnal != TARGET_SIGNAL_0)
4384 warning (" - Can't pass signal %d to target in reverse: ignored.\n",
4388 && remote_protocol_packets[PACKET_bs].support == PACKET_DISABLE)
4389 error (_("Remote reverse-step not supported."));
4391 && remote_protocol_packets[PACKET_bc].support == PACKET_DISABLE)
4392 error (_("Remote reverse-continue not supported."));
4394 strcpy (buf, step ? "bs" : "bc");
4396 else if (siggnal != TARGET_SIGNAL_0)
4398 buf[0] = step ? 'S' : 'C';
4399 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
4400 buf[2] = tohex (((int) siggnal) & 0xf);
4404 strcpy (buf, step ? "s" : "c");
4409 /* We are about to start executing the inferior, let's register it
4410 with the event loop. NOTE: this is the one place where all the
4411 execution commands end up. We could alternatively do this in each
4412 of the execution commands in infcmd.c. */
4413 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
4414 into infcmd.c in order to allow inferior function calls to work
4415 NOT asynchronously. */
4416 if (target_can_async_p ())
4417 target_async (inferior_event_handler, 0);
4419 /* We've just told the target to resume. The remote server will
4420 wait for the inferior to stop, and then send a stop reply. In
4421 the mean time, we can't start another command/query ourselves
4422 because the stub wouldn't be ready to process it. This applies
4423 only to the base all-stop protocol, however. In non-stop (which
4424 only supports vCont), the stub replies with an "OK", and is
4425 immediate able to process further serial input. */
4427 rs->waiting_for_stop_reply = 1;
4431 /* Set up the signal handler for SIGINT, while the target is
4432 executing, ovewriting the 'regular' SIGINT signal handler. */
4434 initialize_sigint_signal_handler (void)
4436 signal (SIGINT, handle_remote_sigint);
4439 /* Signal handler for SIGINT, while the target is executing. */
4441 handle_remote_sigint (int sig)
4443 signal (sig, handle_remote_sigint_twice);
4444 mark_async_signal_handler_wrapper (sigint_remote_token);
4447 /* Signal handler for SIGINT, installed after SIGINT has already been
4448 sent once. It will take effect the second time that the user sends
4451 handle_remote_sigint_twice (int sig)
4453 signal (sig, handle_remote_sigint);
4454 mark_async_signal_handler_wrapper (sigint_remote_twice_token);
4457 /* Perform the real interruption of the target execution, in response
4460 async_remote_interrupt (gdb_client_data arg)
4463 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
4465 target_stop (inferior_ptid);
4468 /* Perform interrupt, if the first attempt did not succeed. Just give
4469 up on the target alltogether. */
4471 async_remote_interrupt_twice (gdb_client_data arg)
4474 fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n");
4479 /* Reinstall the usual SIGINT handlers, after the target has
4482 cleanup_sigint_signal_handler (void *dummy)
4484 signal (SIGINT, handle_sigint);
4487 /* Send ^C to target to halt it. Target will respond, and send us a
4489 static void (*ofunc) (int);
4491 /* The command line interface's stop routine. This function is installed
4492 as a signal handler for SIGINT. The first time a user requests a
4493 stop, we call remote_stop to send a break or ^C. If there is no
4494 response from the target (it didn't stop when the user requested it),
4495 we ask the user if he'd like to detach from the target. */
4497 remote_interrupt (int signo)
4499 /* If this doesn't work, try more severe steps. */
4500 signal (signo, remote_interrupt_twice);
4502 gdb_call_async_signal_handler (sigint_remote_token, 1);
4505 /* The user typed ^C twice. */
4508 remote_interrupt_twice (int signo)
4510 signal (signo, ofunc);
4511 gdb_call_async_signal_handler (sigint_remote_twice_token, 1);
4512 signal (signo, remote_interrupt);
4515 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
4516 thread, all threads of a remote process, or all threads of all
4520 remote_stop_ns (ptid_t ptid)
4522 struct remote_state *rs = get_remote_state ();
4524 char *endp = rs->buf + get_remote_packet_size ();
4526 if (remote_protocol_packets[PACKET_vCont].support == PACKET_SUPPORT_UNKNOWN)
4527 remote_vcont_probe (rs);
4529 if (!rs->support_vCont_t)
4530 error (_("Remote server does not support stopping threads"));
4532 if (ptid_equal (ptid, minus_one_ptid)
4533 || (!remote_multi_process_p (rs) && ptid_is_pid (ptid)))
4534 p += xsnprintf (p, endp - p, "vCont;t");
4539 p += xsnprintf (p, endp - p, "vCont;t:");
4541 if (ptid_is_pid (ptid))
4542 /* All (-1) threads of process. */
4543 nptid = ptid_build (ptid_get_pid (ptid), 0, -1);
4546 /* Small optimization: if we already have a stop reply for
4547 this thread, no use in telling the stub we want this
4549 if (peek_stop_reply (ptid))
4555 p = write_ptid (p, endp, nptid);
4558 /* In non-stop, we get an immediate OK reply. The stop reply will
4559 come in asynchronously by notification. */
4561 getpkt (&rs->buf, &rs->buf_size, 0);
4562 if (strcmp (rs->buf, "OK") != 0)
4563 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid), rs->buf);
4566 /* All-stop version of target_stop. Sends a break or a ^C to stop the
4567 remote target. It is undefined which thread of which process
4568 reports the stop. */
4571 remote_stop_as (ptid_t ptid)
4573 struct remote_state *rs = get_remote_state ();
4575 rs->ctrlc_pending_p = 1;
4577 /* If the inferior is stopped already, but the core didn't know
4578 about it yet, just ignore the request. The cached wait status
4579 will be collected in remote_wait. */
4580 if (rs->cached_wait_status)
4583 /* Send interrupt_sequence to remote target. */
4584 send_interrupt_sequence ();
4587 /* This is the generic stop called via the target vector. When a target
4588 interrupt is requested, either by the command line or the GUI, we
4589 will eventually end up here. */
4592 remote_stop (ptid_t ptid)
4595 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
4598 remote_stop_ns (ptid);
4600 remote_stop_as (ptid);
4603 /* Ask the user what to do when an interrupt is received. */
4606 interrupt_query (void)
4608 target_terminal_ours ();
4610 if (target_can_async_p ())
4612 signal (SIGINT, handle_sigint);
4613 deprecated_throw_reason (RETURN_QUIT);
4617 if (query (_("Interrupted while waiting for the program.\n\
4618 Give up (and stop debugging it)? ")))
4621 deprecated_throw_reason (RETURN_QUIT);
4625 target_terminal_inferior ();
4628 /* Enable/disable target terminal ownership. Most targets can use
4629 terminal groups to control terminal ownership. Remote targets are
4630 different in that explicit transfer of ownership to/from GDB/target
4634 remote_terminal_inferior (void)
4636 if (!target_async_permitted)
4637 /* Nothing to do. */
4640 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
4641 idempotent. The event-loop GDB talking to an asynchronous target
4642 with a synchronous command calls this function from both
4643 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
4644 transfer the terminal to the target when it shouldn't this guard
4646 if (!remote_async_terminal_ours_p)
4648 delete_file_handler (input_fd);
4649 remote_async_terminal_ours_p = 0;
4650 initialize_sigint_signal_handler ();
4651 /* NOTE: At this point we could also register our selves as the
4652 recipient of all input. Any characters typed could then be
4653 passed on down to the target. */
4657 remote_terminal_ours (void)
4659 if (!target_async_permitted)
4660 /* Nothing to do. */
4663 /* See FIXME in remote_terminal_inferior. */
4664 if (remote_async_terminal_ours_p)
4666 cleanup_sigint_signal_handler (NULL);
4667 add_file_handler (input_fd, stdin_event_handler, 0);
4668 remote_async_terminal_ours_p = 1;
4672 remote_console_output (char *msg)
4676 for (p = msg; p[0] && p[1]; p += 2)
4679 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
4683 fputs_unfiltered (tb, gdb_stdtarg);
4685 gdb_flush (gdb_stdtarg);
4688 typedef struct cached_reg
4691 gdb_byte data[MAX_REGISTER_SIZE];
4694 DEF_VEC_O(cached_reg_t);
4698 struct stop_reply *next;
4702 struct target_waitstatus ws;
4704 VEC(cached_reg_t) *regcache;
4706 int stopped_by_watchpoint_p;
4707 CORE_ADDR watch_data_address;
4715 /* The list of already fetched and acknowledged stop events. */
4716 static struct stop_reply *stop_reply_queue;
4718 static struct stop_reply *
4719 stop_reply_xmalloc (void)
4721 struct stop_reply *r = XMALLOC (struct stop_reply);
4728 stop_reply_xfree (struct stop_reply *r)
4732 VEC_free (cached_reg_t, r->regcache);
4737 /* Discard all pending stop replies of inferior PID. If PID is -1,
4738 discard everything. */
4741 discard_pending_stop_replies (int pid)
4743 struct stop_reply *prev = NULL, *reply, *next;
4745 /* Discard the in-flight notification. */
4746 if (pending_stop_reply != NULL
4748 || ptid_get_pid (pending_stop_reply->ptid) == pid))
4750 stop_reply_xfree (pending_stop_reply);
4751 pending_stop_reply = NULL;
4754 /* Discard the stop replies we have already pulled with
4756 for (reply = stop_reply_queue; reply; reply = next)
4760 || ptid_get_pid (reply->ptid) == pid)
4762 if (reply == stop_reply_queue)
4763 stop_reply_queue = reply->next;
4765 prev->next = reply->next;
4767 stop_reply_xfree (reply);
4774 /* Cleanup wrapper. */
4777 do_stop_reply_xfree (void *arg)
4779 struct stop_reply *r = arg;
4781 stop_reply_xfree (r);
4784 /* Look for a queued stop reply belonging to PTID. If one is found,
4785 remove it from the queue, and return it. Returns NULL if none is
4786 found. If there are still queued events left to process, tell the
4787 event loop to get back to target_wait soon. */
4789 static struct stop_reply *
4790 queued_stop_reply (ptid_t ptid)
4792 struct stop_reply *it;
4793 struct stop_reply **it_link;
4795 it = stop_reply_queue;
4796 it_link = &stop_reply_queue;
4799 if (ptid_match (it->ptid, ptid))
4801 *it_link = it->next;
4806 it_link = &it->next;
4810 if (stop_reply_queue)
4811 /* There's still at least an event left. */
4812 mark_async_event_handler (remote_async_inferior_event_token);
4817 /* Push a fully parsed stop reply in the stop reply queue. Since we
4818 know that we now have at least one queued event left to pass to the
4819 core side, tell the event loop to get back to target_wait soon. */
4822 push_stop_reply (struct stop_reply *new_event)
4824 struct stop_reply *event;
4826 if (stop_reply_queue)
4828 for (event = stop_reply_queue;
4829 event && event->next;
4830 event = event->next)
4833 event->next = new_event;
4836 stop_reply_queue = new_event;
4838 mark_async_event_handler (remote_async_inferior_event_token);
4841 /* Returns true if we have a stop reply for PTID. */
4844 peek_stop_reply (ptid_t ptid)
4846 struct stop_reply *it;
4848 for (it = stop_reply_queue; it; it = it->next)
4849 if (ptid_equal (ptid, it->ptid))
4851 if (it->ws.kind == TARGET_WAITKIND_STOPPED)
4858 /* Parse the stop reply in BUF. Either the function succeeds, and the
4859 result is stored in EVENT, or throws an error. */
4862 remote_parse_stop_reply (char *buf, struct stop_reply *event)
4864 struct remote_arch_state *rsa = get_remote_arch_state ();
4868 event->ptid = null_ptid;
4869 event->ws.kind = TARGET_WAITKIND_IGNORE;
4870 event->ws.value.integer = 0;
4871 event->solibs_changed = 0;
4872 event->replay_event = 0;
4873 event->stopped_by_watchpoint_p = 0;
4874 event->regcache = NULL;
4879 case 'T': /* Status with PC, SP, FP, ... */
4880 /* Expedited reply, containing Signal, {regno, reg} repeat. */
4881 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
4883 n... = register number
4884 r... = register contents
4887 p = &buf[3]; /* after Txx */
4895 /* If the packet contains a register number, save it in
4896 pnum and set p1 to point to the character following it.
4897 Otherwise p1 points to p. */
4899 /* If this packet is an awatch packet, don't parse the 'a'
4900 as a register number. */
4902 if (strncmp (p, "awatch", strlen("awatch")) != 0
4903 && strncmp (p, "core", strlen ("core") != 0))
4905 /* Read the ``P'' register number. */
4906 pnum = strtol (p, &p_temp, 16);
4912 if (p1 == p) /* No register number present here. */
4914 p1 = strchr (p, ':');
4916 error (_("Malformed packet(a) (missing colon): %s\n\
4919 if (strncmp (p, "thread", p1 - p) == 0)
4920 event->ptid = read_ptid (++p1, &p);
4921 else if ((strncmp (p, "watch", p1 - p) == 0)
4922 || (strncmp (p, "rwatch", p1 - p) == 0)
4923 || (strncmp (p, "awatch", p1 - p) == 0))
4925 event->stopped_by_watchpoint_p = 1;
4926 p = unpack_varlen_hex (++p1, &addr);
4927 event->watch_data_address = (CORE_ADDR) addr;
4929 else if (strncmp (p, "library", p1 - p) == 0)
4933 while (*p_temp && *p_temp != ';')
4936 event->solibs_changed = 1;
4939 else if (strncmp (p, "replaylog", p1 - p) == 0)
4941 /* NO_HISTORY event.
4942 p1 will indicate "begin" or "end", but
4943 it makes no difference for now, so ignore it. */
4944 event->replay_event = 1;
4945 p_temp = strchr (p1 + 1, ';');
4949 else if (strncmp (p, "core", p1 - p) == 0)
4953 p = unpack_varlen_hex (++p1, &c);
4958 /* Silently skip unknown optional info. */
4959 p_temp = strchr (p1 + 1, ';');
4966 struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum);
4967 cached_reg_t cached_reg;
4972 error (_("Malformed packet(b) (missing colon): %s\n\
4978 error (_("Remote sent bad register number %s: %s\n\
4980 hex_string (pnum), p, buf);
4982 cached_reg.num = reg->regnum;
4984 fieldsize = hex2bin (p, cached_reg.data,
4985 register_size (target_gdbarch,
4988 if (fieldsize < register_size (target_gdbarch,
4990 warning (_("Remote reply is too short: %s"), buf);
4992 VEC_safe_push (cached_reg_t, event->regcache, &cached_reg);
4996 error (_("Remote register badly formatted: %s\nhere: %s"),
5001 case 'S': /* Old style status, just signal only. */
5002 if (event->solibs_changed)
5003 event->ws.kind = TARGET_WAITKIND_LOADED;
5004 else if (event->replay_event)
5005 event->ws.kind = TARGET_WAITKIND_NO_HISTORY;
5008 event->ws.kind = TARGET_WAITKIND_STOPPED;
5009 event->ws.value.sig = (enum target_signal)
5010 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
5013 case 'W': /* Target exited. */
5020 /* GDB used to accept only 2 hex chars here. Stubs should
5021 only send more if they detect GDB supports multi-process
5023 p = unpack_varlen_hex (&buf[1], &value);
5027 /* The remote process exited. */
5028 event->ws.kind = TARGET_WAITKIND_EXITED;
5029 event->ws.value.integer = value;
5033 /* The remote process exited with a signal. */
5034 event->ws.kind = TARGET_WAITKIND_SIGNALLED;
5035 event->ws.value.sig = (enum target_signal) value;
5038 /* If no process is specified, assume inferior_ptid. */
5039 pid = ptid_get_pid (inferior_ptid);
5048 else if (strncmp (p,
5049 "process:", sizeof ("process:") - 1) == 0)
5053 p += sizeof ("process:") - 1;
5054 unpack_varlen_hex (p, &upid);
5058 error (_("unknown stop reply packet: %s"), buf);
5061 error (_("unknown stop reply packet: %s"), buf);
5062 event->ptid = pid_to_ptid (pid);
5067 if (non_stop && ptid_equal (event->ptid, null_ptid))
5068 error (_("No process or thread specified in stop reply: %s"), buf);
5071 /* When the stub wants to tell GDB about a new stop reply, it sends a
5072 stop notification (%Stop). Those can come it at any time, hence,
5073 we have to make sure that any pending putpkt/getpkt sequence we're
5074 making is finished, before querying the stub for more events with
5075 vStopped. E.g., if we started a vStopped sequence immediatelly
5076 upon receiving the %Stop notification, something like this could
5084 1.6) <-- (registers reply to step #1.3)
5086 Obviously, the reply in step #1.6 would be unexpected to a vStopped
5089 To solve this, whenever we parse a %Stop notification sucessfully,
5090 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
5091 doing whatever we were doing:
5097 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
5098 2.5) <-- (registers reply to step #2.3)
5100 Eventualy after step #2.5, we return to the event loop, which
5101 notices there's an event on the
5102 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
5103 associated callback --- the function below. At this point, we're
5104 always safe to start a vStopped sequence. :
5107 2.7) <-- T05 thread:2
5113 remote_get_pending_stop_replies (void)
5115 struct remote_state *rs = get_remote_state ();
5117 if (pending_stop_reply)
5120 putpkt ("vStopped");
5122 /* Now we can rely on it. */
5123 push_stop_reply (pending_stop_reply);
5124 pending_stop_reply = NULL;
5128 getpkt (&rs->buf, &rs->buf_size, 0);
5129 if (strcmp (rs->buf, "OK") == 0)
5133 struct cleanup *old_chain;
5134 struct stop_reply *stop_reply = stop_reply_xmalloc ();
5136 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
5137 remote_parse_stop_reply (rs->buf, stop_reply);
5140 putpkt ("vStopped");
5142 if (stop_reply->ws.kind != TARGET_WAITKIND_IGNORE)
5144 /* Now we can rely on it. */
5145 discard_cleanups (old_chain);
5146 push_stop_reply (stop_reply);
5149 /* We got an unknown stop reply. */
5150 do_cleanups (old_chain);
5157 /* Called when it is decided that STOP_REPLY holds the info of the
5158 event that is to be returned to the core. This function always
5159 destroys STOP_REPLY. */
5162 process_stop_reply (struct stop_reply *stop_reply,
5163 struct target_waitstatus *status)
5167 *status = stop_reply->ws;
5168 ptid = stop_reply->ptid;
5170 /* If no thread/process was reported by the stub, assume the current
5172 if (ptid_equal (ptid, null_ptid))
5173 ptid = inferior_ptid;
5175 if (status->kind != TARGET_WAITKIND_EXITED
5176 && status->kind != TARGET_WAITKIND_SIGNALLED)
5178 /* Expedited registers. */
5179 if (stop_reply->regcache)
5181 struct regcache *regcache
5182 = get_thread_arch_regcache (ptid, target_gdbarch);
5187 VEC_iterate(cached_reg_t, stop_reply->regcache, ix, reg);
5189 regcache_raw_supply (regcache, reg->num, reg->data);
5190 VEC_free (cached_reg_t, stop_reply->regcache);
5193 remote_stopped_by_watchpoint_p = stop_reply->stopped_by_watchpoint_p;
5194 remote_watch_data_address = stop_reply->watch_data_address;
5196 remote_notice_new_inferior (ptid, 0);
5197 demand_private_info (ptid)->core = stop_reply->core;
5200 stop_reply_xfree (stop_reply);
5204 /* The non-stop mode version of target_wait. */
5207 remote_wait_ns (ptid_t ptid, struct target_waitstatus *status, int options)
5209 struct remote_state *rs = get_remote_state ();
5210 struct stop_reply *stop_reply;
5213 /* If in non-stop mode, get out of getpkt even if a
5214 notification is received. */
5216 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
5223 case 'E': /* Error of some sort. */
5224 /* We're out of sync with the target now. Did it continue
5225 or not? We can't tell which thread it was in non-stop,
5226 so just ignore this. */
5227 warning (_("Remote failure reply: %s"), rs->buf);
5229 case 'O': /* Console output. */
5230 remote_console_output (rs->buf + 1);
5233 warning (_("Invalid remote reply: %s"), rs->buf);
5237 /* Acknowledge a pending stop reply that may have arrived in the
5239 if (pending_stop_reply != NULL)
5240 remote_get_pending_stop_replies ();
5242 /* If indeed we noticed a stop reply, we're done. */
5243 stop_reply = queued_stop_reply (ptid);
5244 if (stop_reply != NULL)
5245 return process_stop_reply (stop_reply, status);
5247 /* Still no event. If we're just polling for an event, then
5248 return to the event loop. */
5249 if (options & TARGET_WNOHANG)
5251 status->kind = TARGET_WAITKIND_IGNORE;
5252 return minus_one_ptid;
5255 /* Otherwise do a blocking wait. */
5256 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
5261 /* Wait until the remote machine stops, then return, storing status in
5262 STATUS just as `wait' would. */
5265 remote_wait_as (ptid_t ptid, struct target_waitstatus *status, int options)
5267 struct remote_state *rs = get_remote_state ();
5268 ptid_t event_ptid = null_ptid;
5270 struct stop_reply *stop_reply;
5274 status->kind = TARGET_WAITKIND_IGNORE;
5275 status->value.integer = 0;
5277 stop_reply = queued_stop_reply (ptid);
5278 if (stop_reply != NULL)
5279 return process_stop_reply (stop_reply, status);
5281 if (rs->cached_wait_status)
5282 /* Use the cached wait status, but only once. */
5283 rs->cached_wait_status = 0;
5288 if (!target_is_async_p ())
5290 ofunc = signal (SIGINT, remote_interrupt);
5291 /* If the user hit C-c before this packet, or between packets,
5292 pretend that it was hit right here. */
5296 remote_interrupt (SIGINT);
5300 /* FIXME: cagney/1999-09-27: If we're in async mode we should
5301 _never_ wait for ever -> test on target_is_async_p().
5302 However, before we do that we need to ensure that the caller
5303 knows how to take the target into/out of async mode. */
5304 ret = getpkt_sane (&rs->buf, &rs->buf_size, wait_forever_enabled_p);
5305 if (!target_is_async_p ())
5306 signal (SIGINT, ofunc);
5311 remote_stopped_by_watchpoint_p = 0;
5313 /* We got something. */
5314 rs->waiting_for_stop_reply = 0;
5316 /* Assume that the target has acknowledged Ctrl-C unless we receive
5317 an 'F' or 'O' packet. */
5318 if (buf[0] != 'F' && buf[0] != 'O')
5319 rs->ctrlc_pending_p = 0;
5323 case 'E': /* Error of some sort. */
5324 /* We're out of sync with the target now. Did it continue or
5325 not? Not is more likely, so report a stop. */
5326 warning (_("Remote failure reply: %s"), buf);
5327 status->kind = TARGET_WAITKIND_STOPPED;
5328 status->value.sig = TARGET_SIGNAL_0;
5330 case 'F': /* File-I/O request. */
5331 remote_fileio_request (buf, rs->ctrlc_pending_p);
5332 rs->ctrlc_pending_p = 0;
5334 case 'T': case 'S': case 'X': case 'W':
5336 struct stop_reply *stop_reply;
5337 struct cleanup *old_chain;
5339 stop_reply = stop_reply_xmalloc ();
5340 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
5341 remote_parse_stop_reply (buf, stop_reply);
5342 discard_cleanups (old_chain);
5343 event_ptid = process_stop_reply (stop_reply, status);
5346 case 'O': /* Console output. */
5347 remote_console_output (buf + 1);
5349 /* The target didn't really stop; keep waiting. */
5350 rs->waiting_for_stop_reply = 1;
5354 if (last_sent_signal != TARGET_SIGNAL_0)
5356 /* Zero length reply means that we tried 'S' or 'C' and the
5357 remote system doesn't support it. */
5358 target_terminal_ours_for_output ();
5360 ("Can't send signals to this remote system. %s not sent.\n",
5361 target_signal_to_name (last_sent_signal));
5362 last_sent_signal = TARGET_SIGNAL_0;
5363 target_terminal_inferior ();
5365 strcpy ((char *) buf, last_sent_step ? "s" : "c");
5366 putpkt ((char *) buf);
5368 /* We just told the target to resume, so a stop reply is in
5370 rs->waiting_for_stop_reply = 1;
5373 /* else fallthrough */
5375 warning (_("Invalid remote reply: %s"), buf);
5377 rs->waiting_for_stop_reply = 1;
5381 if (status->kind == TARGET_WAITKIND_IGNORE)
5383 /* Nothing interesting happened. If we're doing a non-blocking
5384 poll, we're done. Otherwise, go back to waiting. */
5385 if (options & TARGET_WNOHANG)
5386 return minus_one_ptid;
5390 else if (status->kind != TARGET_WAITKIND_EXITED
5391 && status->kind != TARGET_WAITKIND_SIGNALLED)
5393 if (!ptid_equal (event_ptid, null_ptid))
5394 record_currthread (event_ptid);
5396 event_ptid = inferior_ptid;
5399 /* A process exit. Invalidate our notion of current thread. */
5400 record_currthread (minus_one_ptid);
5405 /* Wait until the remote machine stops, then return, storing status in
5406 STATUS just as `wait' would. */
5409 remote_wait (struct target_ops *ops,
5410 ptid_t ptid, struct target_waitstatus *status, int options)
5415 event_ptid = remote_wait_ns (ptid, status, options);
5417 event_ptid = remote_wait_as (ptid, status, options);
5419 if (target_can_async_p ())
5421 /* If there are are events left in the queue tell the event loop
5423 if (stop_reply_queue)
5424 mark_async_event_handler (remote_async_inferior_event_token);
5430 /* Fetch a single register using a 'p' packet. */
5433 fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg)
5435 struct remote_state *rs = get_remote_state ();
5437 char regp[MAX_REGISTER_SIZE];
5440 if (remote_protocol_packets[PACKET_p].support == PACKET_DISABLE)
5443 if (reg->pnum == -1)
5448 p += hexnumstr (p, reg->pnum);
5451 getpkt (&rs->buf, &rs->buf_size, 0);
5455 switch (packet_ok (buf, &remote_protocol_packets[PACKET_p]))
5459 case PACKET_UNKNOWN:
5462 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
5463 gdbarch_register_name (get_regcache_arch (regcache),
5468 /* If this register is unfetchable, tell the regcache. */
5471 regcache_raw_supply (regcache, reg->regnum, NULL);
5475 /* Otherwise, parse and supply the value. */
5481 error (_("fetch_register_using_p: early buf termination"));
5483 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
5486 regcache_raw_supply (regcache, reg->regnum, regp);
5490 /* Fetch the registers included in the target's 'g' packet. */
5493 send_g_packet (void)
5495 struct remote_state *rs = get_remote_state ();
5498 sprintf (rs->buf, "g");
5499 remote_send (&rs->buf, &rs->buf_size);
5501 /* We can get out of synch in various cases. If the first character
5502 in the buffer is not a hex character, assume that has happened
5503 and try to fetch another packet to read. */
5504 while ((rs->buf[0] < '0' || rs->buf[0] > '9')
5505 && (rs->buf[0] < 'A' || rs->buf[0] > 'F')
5506 && (rs->buf[0] < 'a' || rs->buf[0] > 'f')
5507 && rs->buf[0] != 'x') /* New: unavailable register value. */
5510 fprintf_unfiltered (gdb_stdlog,
5511 "Bad register packet; fetching a new packet\n");
5512 getpkt (&rs->buf, &rs->buf_size, 0);
5515 buf_len = strlen (rs->buf);
5517 /* Sanity check the received packet. */
5518 if (buf_len % 2 != 0)
5519 error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf);
5525 process_g_packet (struct regcache *regcache)
5527 struct gdbarch *gdbarch = get_regcache_arch (regcache);
5528 struct remote_state *rs = get_remote_state ();
5529 struct remote_arch_state *rsa = get_remote_arch_state ();
5534 buf_len = strlen (rs->buf);
5536 /* Further sanity checks, with knowledge of the architecture. */
5537 if (buf_len > 2 * rsa->sizeof_g_packet)
5538 error (_("Remote 'g' packet reply is too long: %s"), rs->buf);
5540 /* Save the size of the packet sent to us by the target. It is used
5541 as a heuristic when determining the max size of packets that the
5542 target can safely receive. */
5543 if (rsa->actual_register_packet_size == 0)
5544 rsa->actual_register_packet_size = buf_len;
5546 /* If this is smaller than we guessed the 'g' packet would be,
5547 update our records. A 'g' reply that doesn't include a register's
5548 value implies either that the register is not available, or that
5549 the 'p' packet must be used. */
5550 if (buf_len < 2 * rsa->sizeof_g_packet)
5552 rsa->sizeof_g_packet = buf_len / 2;
5554 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
5556 if (rsa->regs[i].pnum == -1)
5559 if (rsa->regs[i].offset >= rsa->sizeof_g_packet)
5560 rsa->regs[i].in_g_packet = 0;
5562 rsa->regs[i].in_g_packet = 1;
5566 regs = alloca (rsa->sizeof_g_packet);
5568 /* Unimplemented registers read as all bits zero. */
5569 memset (regs, 0, rsa->sizeof_g_packet);
5571 /* Reply describes registers byte by byte, each byte encoded as two
5572 hex characters. Suck them all up, then supply them to the
5573 register cacheing/storage mechanism. */
5576 for (i = 0; i < rsa->sizeof_g_packet; i++)
5578 if (p[0] == 0 || p[1] == 0)
5579 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
5580 internal_error (__FILE__, __LINE__,
5581 "unexpected end of 'g' packet reply");
5583 if (p[0] == 'x' && p[1] == 'x')
5584 regs[i] = 0; /* 'x' */
5586 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
5590 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
5592 struct packet_reg *r = &rsa->regs[i];
5596 if (r->offset * 2 >= strlen (rs->buf))
5597 /* This shouldn't happen - we adjusted in_g_packet above. */
5598 internal_error (__FILE__, __LINE__,
5599 "unexpected end of 'g' packet reply");
5600 else if (rs->buf[r->offset * 2] == 'x')
5602 gdb_assert (r->offset * 2 < strlen (rs->buf));
5603 /* The register isn't available, mark it as such (at
5604 the same time setting the value to zero). */
5605 regcache_raw_supply (regcache, r->regnum, NULL);
5608 regcache_raw_supply (regcache, r->regnum,
5615 fetch_registers_using_g (struct regcache *regcache)
5618 process_g_packet (regcache);
5622 remote_fetch_registers (struct target_ops *ops,
5623 struct regcache *regcache, int regnum)
5625 struct remote_arch_state *rsa = get_remote_arch_state ();
5628 set_general_thread (inferior_ptid);
5632 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
5634 gdb_assert (reg != NULL);
5636 /* If this register might be in the 'g' packet, try that first -
5637 we are likely to read more than one register. If this is the
5638 first 'g' packet, we might be overly optimistic about its
5639 contents, so fall back to 'p'. */
5640 if (reg->in_g_packet)
5642 fetch_registers_using_g (regcache);
5643 if (reg->in_g_packet)
5647 if (fetch_register_using_p (regcache, reg))
5650 /* This register is not available. */
5651 regcache_raw_supply (regcache, reg->regnum, NULL);
5656 fetch_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 (!fetch_register_using_p (regcache, &rsa->regs[i]))
5662 /* This register is not available. */
5663 regcache_raw_supply (regcache, i, NULL);
5667 /* Prepare to store registers. Since we may send them all (using a
5668 'G' request), we have to read out the ones we don't want to change
5672 remote_prepare_to_store (struct regcache *regcache)
5674 struct remote_arch_state *rsa = get_remote_arch_state ();
5676 gdb_byte buf[MAX_REGISTER_SIZE];
5678 /* Make sure the entire registers array is valid. */
5679 switch (remote_protocol_packets[PACKET_P].support)
5681 case PACKET_DISABLE:
5682 case PACKET_SUPPORT_UNKNOWN:
5683 /* Make sure all the necessary registers are cached. */
5684 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
5685 if (rsa->regs[i].in_g_packet)
5686 regcache_raw_read (regcache, rsa->regs[i].regnum, buf);
5693 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
5694 packet was not recognized. */
5697 store_register_using_P (const struct regcache *regcache,
5698 struct packet_reg *reg)
5700 struct gdbarch *gdbarch = get_regcache_arch (regcache);
5701 struct remote_state *rs = get_remote_state ();
5702 /* Try storing a single register. */
5703 char *buf = rs->buf;
5704 gdb_byte regp[MAX_REGISTER_SIZE];
5707 if (remote_protocol_packets[PACKET_P].support == PACKET_DISABLE)
5710 if (reg->pnum == -1)
5713 xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0));
5714 p = buf + strlen (buf);
5715 regcache_raw_collect (regcache, reg->regnum, regp);
5716 bin2hex (regp, p, register_size (gdbarch, reg->regnum));
5718 getpkt (&rs->buf, &rs->buf_size, 0);
5720 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P]))
5725 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
5726 gdbarch_register_name (gdbarch, reg->regnum), rs->buf);
5727 case PACKET_UNKNOWN:
5730 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
5734 /* Store register REGNUM, or all registers if REGNUM == -1, from the
5735 contents of the register cache buffer. FIXME: ignores errors. */
5738 store_registers_using_G (const struct regcache *regcache)
5740 struct remote_state *rs = get_remote_state ();
5741 struct remote_arch_state *rsa = get_remote_arch_state ();
5745 /* Extract all the registers in the regcache copying them into a
5750 regs = alloca (rsa->sizeof_g_packet);
5751 memset (regs, 0, rsa->sizeof_g_packet);
5752 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
5754 struct packet_reg *r = &rsa->regs[i];
5757 regcache_raw_collect (regcache, r->regnum, regs + r->offset);
5761 /* Command describes registers byte by byte,
5762 each byte encoded as two hex characters. */
5765 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
5767 bin2hex (regs, p, rsa->sizeof_g_packet);
5769 getpkt (&rs->buf, &rs->buf_size, 0);
5770 if (packet_check_result (rs->buf) == PACKET_ERROR)
5771 error (_("Could not write registers; remote failure reply '%s'"),
5775 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
5776 of the register cache buffer. FIXME: ignores errors. */
5779 remote_store_registers (struct target_ops *ops,
5780 struct regcache *regcache, int regnum)
5782 struct remote_arch_state *rsa = get_remote_arch_state ();
5785 set_general_thread (inferior_ptid);
5789 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
5791 gdb_assert (reg != NULL);
5793 /* Always prefer to store registers using the 'P' packet if
5794 possible; we often change only a small number of registers.
5795 Sometimes we change a larger number; we'd need help from a
5796 higher layer to know to use 'G'. */
5797 if (store_register_using_P (regcache, reg))
5800 /* For now, don't complain if we have no way to write the
5801 register. GDB loses track of unavailable registers too
5802 easily. Some day, this may be an error. We don't have
5803 any way to read the register, either... */
5804 if (!reg->in_g_packet)
5807 store_registers_using_G (regcache);
5811 store_registers_using_G (regcache);
5813 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
5814 if (!rsa->regs[i].in_g_packet)
5815 if (!store_register_using_P (regcache, &rsa->regs[i]))
5816 /* See above for why we do not issue an error here. */
5821 /* Return the number of hex digits in num. */
5824 hexnumlen (ULONGEST num)
5828 for (i = 0; num != 0; i++)
5834 /* Set BUF to the minimum number of hex digits representing NUM. */
5837 hexnumstr (char *buf, ULONGEST num)
5839 int len = hexnumlen (num);
5841 return hexnumnstr (buf, num, len);
5845 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
5848 hexnumnstr (char *buf, ULONGEST num, int width)
5854 for (i = width - 1; i >= 0; i--)
5856 buf[i] = "0123456789abcdef"[(num & 0xf)];
5863 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
5866 remote_address_masked (CORE_ADDR addr)
5868 int address_size = remote_address_size;
5870 /* If "remoteaddresssize" was not set, default to target address size. */
5872 address_size = gdbarch_addr_bit (target_gdbarch);
5874 if (address_size > 0
5875 && address_size < (sizeof (ULONGEST) * 8))
5877 /* Only create a mask when that mask can safely be constructed
5878 in a ULONGEST variable. */
5881 mask = (mask << address_size) - 1;
5887 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
5888 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
5889 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
5890 (which may be more than *OUT_LEN due to escape characters). The
5891 total number of bytes in the output buffer will be at most
5895 remote_escape_output (const gdb_byte *buffer, int len,
5896 gdb_byte *out_buf, int *out_len,
5899 int input_index, output_index;
5902 for (input_index = 0; input_index < len; input_index++)
5904 gdb_byte b = buffer[input_index];
5906 if (b == '$' || b == '#' || b == '}')
5908 /* These must be escaped. */
5909 if (output_index + 2 > out_maxlen)
5911 out_buf[output_index++] = '}';
5912 out_buf[output_index++] = b ^ 0x20;
5916 if (output_index + 1 > out_maxlen)
5918 out_buf[output_index++] = b;
5922 *out_len = input_index;
5923 return output_index;
5926 /* Convert BUFFER, escaped data LEN bytes long, into binary data
5927 in OUT_BUF. Return the number of bytes written to OUT_BUF.
5928 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
5930 This function reverses remote_escape_output. It allows more
5931 escaped characters than that function does, in particular because
5932 '*' must be escaped to avoid the run-length encoding processing
5933 in reading packets. */
5936 remote_unescape_input (const gdb_byte *buffer, int len,
5937 gdb_byte *out_buf, int out_maxlen)
5939 int input_index, output_index;
5944 for (input_index = 0; input_index < len; input_index++)
5946 gdb_byte b = buffer[input_index];
5948 if (output_index + 1 > out_maxlen)
5950 warning (_("Received too much data from remote target;"
5951 " ignoring overflow."));
5952 return output_index;
5957 out_buf[output_index++] = b ^ 0x20;
5963 out_buf[output_index++] = b;
5967 error (_("Unmatched escape character in target response."));
5969 return output_index;
5972 /* Determine whether the remote target supports binary downloading.
5973 This is accomplished by sending a no-op memory write of zero length
5974 to the target at the specified address. It does not suffice to send
5975 the whole packet, since many stubs strip the eighth bit and
5976 subsequently compute a wrong checksum, which causes real havoc with
5979 NOTE: This can still lose if the serial line is not eight-bit
5980 clean. In cases like this, the user should clear "remote
5984 check_binary_download (CORE_ADDR addr)
5986 struct remote_state *rs = get_remote_state ();
5988 switch (remote_protocol_packets[PACKET_X].support)
5990 case PACKET_DISABLE:
5994 case PACKET_SUPPORT_UNKNOWN:
6000 p += hexnumstr (p, (ULONGEST) addr);
6002 p += hexnumstr (p, (ULONGEST) 0);
6006 putpkt_binary (rs->buf, (int) (p - rs->buf));
6007 getpkt (&rs->buf, &rs->buf_size, 0);
6009 if (rs->buf[0] == '\0')
6012 fprintf_unfiltered (gdb_stdlog,
6013 "binary downloading NOT suppported by target\n");
6014 remote_protocol_packets[PACKET_X].support = PACKET_DISABLE;
6019 fprintf_unfiltered (gdb_stdlog,
6020 "binary downloading suppported by target\n");
6021 remote_protocol_packets[PACKET_X].support = PACKET_ENABLE;
6028 /* Write memory data directly to the remote machine.
6029 This does not inform the data cache; the data cache uses this.
6030 HEADER is the starting part of the packet.
6031 MEMADDR is the address in the remote memory space.
6032 MYADDR is the address of the buffer in our space.
6033 LEN is the number of bytes.
6034 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
6035 should send data as binary ('X'), or hex-encoded ('M').
6037 The function creates packet of the form
6038 <HEADER><ADDRESS>,<LENGTH>:<DATA>
6040 where encoding of <DATA> is termined by PACKET_FORMAT.
6042 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
6045 Returns the number of bytes transferred, or 0 (setting errno) for
6046 error. Only transfer a single packet. */
6049 remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
6050 const gdb_byte *myaddr, int len,
6051 char packet_format, int use_length)
6053 struct remote_state *rs = get_remote_state ();
6063 if (packet_format != 'X' && packet_format != 'M')
6064 internal_error (__FILE__, __LINE__,
6065 "remote_write_bytes_aux: bad packet format");
6070 payload_size = get_memory_write_packet_size ();
6072 /* The packet buffer will be large enough for the payload;
6073 get_memory_packet_size ensures this. */
6076 /* Compute the size of the actual payload by subtracting out the
6077 packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
6079 payload_size -= strlen ("$,:#NN");
6081 /* The comma won't be used. */
6083 header_length = strlen (header);
6084 payload_size -= header_length;
6085 payload_size -= hexnumlen (memaddr);
6087 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
6089 strcat (rs->buf, header);
6090 p = rs->buf + strlen (header);
6092 /* Compute a best guess of the number of bytes actually transfered. */
6093 if (packet_format == 'X')
6095 /* Best guess at number of bytes that will fit. */
6096 todo = min (len, payload_size);
6098 payload_size -= hexnumlen (todo);
6099 todo = min (todo, payload_size);
6103 /* Num bytes that will fit. */
6104 todo = min (len, payload_size / 2);
6106 payload_size -= hexnumlen (todo);
6107 todo = min (todo, payload_size / 2);
6111 internal_error (__FILE__, __LINE__,
6112 _("minumum packet size too small to write data"));
6114 /* If we already need another packet, then try to align the end
6115 of this packet to a useful boundary. */
6116 if (todo > 2 * REMOTE_ALIGN_WRITES && todo < len)
6117 todo = ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr;
6119 /* Append "<memaddr>". */
6120 memaddr = remote_address_masked (memaddr);
6121 p += hexnumstr (p, (ULONGEST) memaddr);
6128 /* Append <len>. Retain the location/size of <len>. It may need to
6129 be adjusted once the packet body has been created. */
6131 plenlen = hexnumstr (p, (ULONGEST) todo);
6139 /* Append the packet body. */
6140 if (packet_format == 'X')
6142 /* Binary mode. Send target system values byte by byte, in
6143 increasing byte addresses. Only escape certain critical
6145 payload_length = remote_escape_output (myaddr, todo, p, &nr_bytes,
6148 /* If not all TODO bytes fit, then we'll need another packet. Make
6149 a second try to keep the end of the packet aligned. Don't do
6150 this if the packet is tiny. */
6151 if (nr_bytes < todo && nr_bytes > 2 * REMOTE_ALIGN_WRITES)
6155 new_nr_bytes = (((memaddr + nr_bytes) & ~(REMOTE_ALIGN_WRITES - 1))
6157 if (new_nr_bytes != nr_bytes)
6158 payload_length = remote_escape_output (myaddr, new_nr_bytes,
6163 p += payload_length;
6164 if (use_length && nr_bytes < todo)
6166 /* Escape chars have filled up the buffer prematurely,
6167 and we have actually sent fewer bytes than planned.
6168 Fix-up the length field of the packet. Use the same
6169 number of characters as before. */
6170 plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen);
6171 *plen = ':'; /* overwrite \0 from hexnumnstr() */
6176 /* Normal mode: Send target system values byte by byte, in
6177 increasing byte addresses. Each byte is encoded as a two hex
6179 nr_bytes = bin2hex (myaddr, p, todo);
6183 putpkt_binary (rs->buf, (int) (p - rs->buf));
6184 getpkt (&rs->buf, &rs->buf_size, 0);
6186 if (rs->buf[0] == 'E')
6188 /* There is no correspondance between what the remote protocol
6189 uses for errors and errno codes. We would like a cleaner way
6190 of representing errors (big enough to include errno codes,
6191 bfd_error codes, and others). But for now just return EIO. */
6196 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
6197 fewer bytes than we'd planned. */
6201 /* Write memory data directly to the remote machine.
6202 This does not inform the data cache; the data cache uses this.
6203 MEMADDR is the address in the remote memory space.
6204 MYADDR is the address of the buffer in our space.
6205 LEN is the number of bytes.
6207 Returns number of bytes transferred, or 0 (setting errno) for
6208 error. Only transfer a single packet. */
6211 remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
6213 char *packet_format = 0;
6215 /* Check whether the target supports binary download. */
6216 check_binary_download (memaddr);
6218 switch (remote_protocol_packets[PACKET_X].support)
6221 packet_format = "X";
6223 case PACKET_DISABLE:
6224 packet_format = "M";
6226 case PACKET_SUPPORT_UNKNOWN:
6227 internal_error (__FILE__, __LINE__,
6228 _("remote_write_bytes: bad internal state"));
6230 internal_error (__FILE__, __LINE__, _("bad switch"));
6233 return remote_write_bytes_aux (packet_format,
6234 memaddr, myaddr, len, packet_format[0], 1);
6237 /* Read memory data directly from the remote machine.
6238 This does not use the data cache; the data cache uses this.
6239 MEMADDR is the address in the remote memory space.
6240 MYADDR is the address of the buffer in our space.
6241 LEN is the number of bytes.
6243 Returns number of bytes transferred, or 0 for error. */
6245 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
6246 remote targets) shouldn't attempt to read the entire buffer.
6247 Instead it should read a single packet worth of data and then
6248 return the byte size of that packet to the caller. The caller (its
6249 caller and its callers caller ;-) already contains code for
6250 handling partial reads. */
6253 remote_read_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
6255 struct remote_state *rs = get_remote_state ();
6256 int max_buf_size; /* Max size of packet output buffer. */
6262 max_buf_size = get_memory_read_packet_size ();
6263 /* The packet buffer will be large enough for the payload;
6264 get_memory_packet_size ensures this. */
6273 todo = min (len, max_buf_size / 2); /* num bytes that will fit */
6275 /* construct "m"<memaddr>","<len>" */
6276 /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */
6277 memaddr = remote_address_masked (memaddr);
6280 p += hexnumstr (p, (ULONGEST) memaddr);
6282 p += hexnumstr (p, (ULONGEST) todo);
6286 getpkt (&rs->buf, &rs->buf_size, 0);
6288 if (rs->buf[0] == 'E'
6289 && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2])
6290 && rs->buf[3] == '\0')
6292 /* There is no correspondance between what the remote
6293 protocol uses for errors and errno codes. We would like
6294 a cleaner way of representing errors (big enough to
6295 include errno codes, bfd_error codes, and others). But
6296 for now just return EIO. */
6301 /* Reply describes memory byte by byte,
6302 each byte encoded as two hex characters. */
6305 if ((i = hex2bin (p, myaddr, todo)) < todo)
6307 /* Reply is short. This means that we were able to read
6308 only part of what we wanted to. */
6309 return i + (origlen - len);
6319 /* Remote notification handler. */
6322 handle_notification (char *buf, size_t length)
6324 if (strncmp (buf, "Stop:", 5) == 0)
6326 if (pending_stop_reply)
6328 /* We've already parsed the in-flight stop-reply, but the
6329 stub for some reason thought we didn't, possibly due to
6330 timeout on its side. Just ignore it. */
6332 fprintf_unfiltered (gdb_stdlog, "ignoring resent notification\n");
6336 struct cleanup *old_chain;
6337 struct stop_reply *reply = stop_reply_xmalloc ();
6339 old_chain = make_cleanup (do_stop_reply_xfree, reply);
6341 remote_parse_stop_reply (buf + 5, reply);
6343 discard_cleanups (old_chain);
6345 /* Be careful to only set it after parsing, since an error
6346 may be thrown then. */
6347 pending_stop_reply = reply;
6349 /* Notify the event loop there's a stop reply to acknowledge
6350 and that there may be more events to fetch. */
6351 mark_async_event_handler (remote_async_get_pending_events_token);
6354 fprintf_unfiltered (gdb_stdlog, "stop notification captured\n");
6358 /* We ignore notifications we don't recognize, for compatibility
6359 with newer stubs. */
6364 /* Read or write LEN bytes from inferior memory at MEMADDR,
6365 transferring to or from debugger address BUFFER. Write to inferior
6366 if SHOULD_WRITE is nonzero. Returns length of data written or
6367 read; 0 for error. TARGET is unused. */
6370 remote_xfer_memory (CORE_ADDR mem_addr, gdb_byte *buffer, int mem_len,
6371 int should_write, struct mem_attrib *attrib,
6372 struct target_ops *target)
6376 set_general_thread (inferior_ptid);
6379 res = remote_write_bytes (mem_addr, buffer, mem_len);
6381 res = remote_read_bytes (mem_addr, buffer, mem_len);
6386 /* Sends a packet with content determined by the printf format string
6387 FORMAT and the remaining arguments, then gets the reply. Returns
6388 whether the packet was a success, a failure, or unknown. */
6390 static enum packet_result
6391 remote_send_printf (const char *format, ...)
6393 struct remote_state *rs = get_remote_state ();
6394 int max_size = get_remote_packet_size ();
6397 va_start (ap, format);
6400 if (vsnprintf (rs->buf, max_size, format, ap) >= max_size)
6401 internal_error (__FILE__, __LINE__, "Too long remote packet.");
6403 if (putpkt (rs->buf) < 0)
6404 error (_("Communication problem with target."));
6407 getpkt (&rs->buf, &rs->buf_size, 0);
6409 return packet_check_result (rs->buf);
6413 restore_remote_timeout (void *p)
6415 int value = *(int *)p;
6417 remote_timeout = value;
6420 /* Flash writing can take quite some time. We'll set
6421 effectively infinite timeout for flash operations.
6422 In future, we'll need to decide on a better approach. */
6423 static const int remote_flash_timeout = 1000;
6426 remote_flash_erase (struct target_ops *ops,
6427 ULONGEST address, LONGEST length)
6429 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
6430 int saved_remote_timeout = remote_timeout;
6431 enum packet_result ret;
6432 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
6433 &saved_remote_timeout);
6435 remote_timeout = remote_flash_timeout;
6437 ret = remote_send_printf ("vFlashErase:%s,%s",
6438 phex (address, addr_size),
6442 case PACKET_UNKNOWN:
6443 error (_("Remote target does not support flash erase"));
6445 error (_("Error erasing flash with vFlashErase packet"));
6450 do_cleanups (back_to);
6454 remote_flash_write (struct target_ops *ops,
6455 ULONGEST address, LONGEST length,
6456 const gdb_byte *data)
6458 int saved_remote_timeout = remote_timeout;
6460 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
6461 &saved_remote_timeout);
6463 remote_timeout = remote_flash_timeout;
6464 ret = remote_write_bytes_aux ("vFlashWrite:", address, data, length, 'X', 0);
6465 do_cleanups (back_to);
6471 remote_flash_done (struct target_ops *ops)
6473 int saved_remote_timeout = remote_timeout;
6475 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
6476 &saved_remote_timeout);
6478 remote_timeout = remote_flash_timeout;
6479 ret = remote_send_printf ("vFlashDone");
6480 do_cleanups (back_to);
6484 case PACKET_UNKNOWN:
6485 error (_("Remote target does not support vFlashDone"));
6487 error (_("Error finishing flash operation"));
6494 remote_files_info (struct target_ops *ignore)
6496 puts_filtered ("Debugging a target over a serial line.\n");
6499 /* Stuff for dealing with the packets which are part of this protocol.
6500 See comment at top of file for details. */
6502 /* Read a single character from the remote end. */
6505 readchar (int timeout)
6509 ch = serial_readchar (remote_desc, timeout);
6514 switch ((enum serial_rc) ch)
6518 error (_("Remote connection closed"));
6521 perror_with_name (_("Remote communication error"));
6523 case SERIAL_TIMEOUT:
6529 /* Send the command in *BUF to the remote machine, and read the reply
6530 into *BUF. Report an error if we get an error reply. Resize
6531 *BUF using xrealloc if necessary to hold the result, and update
6535 remote_send (char **buf,
6539 getpkt (buf, sizeof_buf, 0);
6541 if ((*buf)[0] == 'E')
6542 error (_("Remote failure reply: %s"), *buf);
6545 /* Return a pointer to an xmalloc'ed string representing an escaped
6546 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
6547 etc. The caller is responsible for releasing the returned
6551 escape_buffer (const char *buf, int n)
6553 struct cleanup *old_chain;
6554 struct ui_file *stb;
6557 stb = mem_fileopen ();
6558 old_chain = make_cleanup_ui_file_delete (stb);
6560 fputstrn_unfiltered (buf, n, 0, stb);
6561 str = ui_file_xstrdup (stb, NULL);
6562 do_cleanups (old_chain);
6566 /* Display a null-terminated packet on stdout, for debugging, using C
6570 print_packet (char *buf)
6572 puts_filtered ("\"");
6573 fputstr_filtered (buf, '"', gdb_stdout);
6574 puts_filtered ("\"");
6580 return putpkt_binary (buf, strlen (buf));
6583 /* Send a packet to the remote machine, with error checking. The data
6584 of the packet is in BUF. The string in BUF can be at most
6585 get_remote_packet_size () - 5 to account for the $, # and checksum,
6586 and for a possible /0 if we are debugging (remote_debug) and want
6587 to print the sent packet as a string. */
6590 putpkt_binary (char *buf, int cnt)
6592 struct remote_state *rs = get_remote_state ();
6594 unsigned char csum = 0;
6595 char *buf2 = alloca (cnt + 6);
6601 /* Catch cases like trying to read memory or listing threads while
6602 we're waiting for a stop reply. The remote server wouldn't be
6603 ready to handle this request, so we'd hang and timeout. We don't
6604 have to worry about this in synchronous mode, because in that
6605 case it's not possible to issue a command while the target is
6606 running. This is not a problem in non-stop mode, because in that
6607 case, the stub is always ready to process serial input. */
6608 if (!non_stop && target_can_async_p () && rs->waiting_for_stop_reply)
6609 error (_("Cannot execute this command while the target is running."));
6611 /* We're sending out a new packet. Make sure we don't look at a
6612 stale cached response. */
6613 rs->cached_wait_status = 0;
6615 /* Copy the packet into buffer BUF2, encapsulating it
6616 and giving it a checksum. */
6621 for (i = 0; i < cnt; i++)
6627 *p++ = tohex ((csum >> 4) & 0xf);
6628 *p++ = tohex (csum & 0xf);
6630 /* Send it over and over until we get a positive ack. */
6634 int started_error_output = 0;
6638 struct cleanup *old_chain;
6642 str = escape_buffer (buf2, p - buf2);
6643 old_chain = make_cleanup (xfree, str);
6644 fprintf_unfiltered (gdb_stdlog, "Sending packet: %s...", str);
6645 gdb_flush (gdb_stdlog);
6646 do_cleanups (old_chain);
6648 if (serial_write (remote_desc, buf2, p - buf2))
6649 perror_with_name (_("putpkt: write failed"));
6651 /* If this is a no acks version of the remote protocol, send the
6652 packet and move on. */
6656 /* Read until either a timeout occurs (-2) or '+' is read.
6657 Handle any notification that arrives in the mean time. */
6660 ch = readchar (remote_timeout);
6668 case SERIAL_TIMEOUT:
6671 if (started_error_output)
6673 putchar_unfiltered ('\n');
6674 started_error_output = 0;
6683 fprintf_unfiltered (gdb_stdlog, "Ack\n");
6687 fprintf_unfiltered (gdb_stdlog, "Nak\n");
6688 case SERIAL_TIMEOUT:
6692 break; /* Retransmit buffer. */
6696 fprintf_unfiltered (gdb_stdlog,
6697 "Packet instead of Ack, ignoring it\n");
6698 /* It's probably an old response sent because an ACK
6699 was lost. Gobble up the packet and ack it so it
6700 doesn't get retransmitted when we resend this
6703 serial_write (remote_desc, "+", 1);
6704 continue; /* Now, go look for +. */
6711 /* If we got a notification, handle it, and go back to looking
6713 /* We've found the start of a notification. Now
6714 collect the data. */
6715 val = read_frame (&rs->buf, &rs->buf_size);
6720 struct cleanup *old_chain;
6723 str = escape_buffer (rs->buf, val);
6724 old_chain = make_cleanup (xfree, str);
6725 fprintf_unfiltered (gdb_stdlog,
6726 " Notification received: %s\n",
6728 do_cleanups (old_chain);
6730 handle_notification (rs->buf, val);
6731 /* We're in sync now, rewait for the ack. */
6738 if (!started_error_output)
6740 started_error_output = 1;
6741 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
6743 fputc_unfiltered (ch & 0177, gdb_stdlog);
6744 fprintf_unfiltered (gdb_stdlog, "%s", rs->buf);
6753 if (!started_error_output)
6755 started_error_output = 1;
6756 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
6758 fputc_unfiltered (ch & 0177, gdb_stdlog);
6762 break; /* Here to retransmit. */
6766 /* This is wrong. If doing a long backtrace, the user should be
6767 able to get out next time we call QUIT, without anything as
6768 violent as interrupt_query. If we want to provide a way out of
6769 here without getting to the next QUIT, it should be based on
6770 hitting ^C twice as in remote_wait. */
6781 /* Come here after finding the start of a frame when we expected an
6782 ack. Do our best to discard the rest of this packet. */
6791 c = readchar (remote_timeout);
6794 case SERIAL_TIMEOUT:
6795 /* Nothing we can do. */
6798 /* Discard the two bytes of checksum and stop. */
6799 c = readchar (remote_timeout);
6801 c = readchar (remote_timeout);
6804 case '*': /* Run length encoding. */
6805 /* Discard the repeat count. */
6806 c = readchar (remote_timeout);
6811 /* A regular character. */
6817 /* Come here after finding the start of the frame. Collect the rest
6818 into *BUF, verifying the checksum, length, and handling run-length
6819 compression. NUL terminate the buffer. If there is not enough room,
6820 expand *BUF using xrealloc.
6822 Returns -1 on error, number of characters in buffer (ignoring the
6823 trailing NULL) on success. (could be extended to return one of the
6824 SERIAL status indications). */
6827 read_frame (char **buf_p,
6834 struct remote_state *rs = get_remote_state ();
6841 c = readchar (remote_timeout);
6844 case SERIAL_TIMEOUT:
6846 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
6850 fputs_filtered ("Saw new packet start in middle of old one\n",
6852 return -1; /* Start a new packet, count retries. */
6855 unsigned char pktcsum;
6861 check_0 = readchar (remote_timeout);
6863 check_1 = readchar (remote_timeout);
6865 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
6868 fputs_filtered ("Timeout in checksum, retrying\n",
6872 else if (check_0 < 0 || check_1 < 0)
6875 fputs_filtered ("Communication error in checksum\n",
6880 /* Don't recompute the checksum; with no ack packets we
6881 don't have any way to indicate a packet retransmission
6886 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
6887 if (csum == pktcsum)
6892 struct cleanup *old_chain;
6895 str = escape_buffer (buf, bc);
6896 old_chain = make_cleanup (xfree, str);
6897 fprintf_unfiltered (gdb_stdlog,
6899 Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n",
6900 pktcsum, csum, str);
6901 do_cleanups (old_chain);
6903 /* Number of characters in buffer ignoring trailing
6907 case '*': /* Run length encoding. */
6912 c = readchar (remote_timeout);
6914 repeat = c - ' ' + 3; /* Compute repeat count. */
6916 /* The character before ``*'' is repeated. */
6918 if (repeat > 0 && repeat <= 255 && bc > 0)
6920 if (bc + repeat - 1 >= *sizeof_buf - 1)
6922 /* Make some more room in the buffer. */
6923 *sizeof_buf += repeat;
6924 *buf_p = xrealloc (*buf_p, *sizeof_buf);
6928 memset (&buf[bc], buf[bc - 1], repeat);
6934 printf_filtered (_("Invalid run length encoding: %s\n"), buf);
6938 if (bc >= *sizeof_buf - 1)
6940 /* Make some more room in the buffer. */
6942 *buf_p = xrealloc (*buf_p, *sizeof_buf);
6953 /* Read a packet from the remote machine, with error checking, and
6954 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6955 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6956 rather than timing out; this is used (in synchronous mode) to wait
6957 for a target that is is executing user code to stop. */
6958 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
6959 don't have to change all the calls to getpkt to deal with the
6960 return value, because at the moment I don't know what the right
6961 thing to do it for those. */
6969 timed_out = getpkt_sane (buf, sizeof_buf, forever);
6973 /* Read a packet from the remote machine, with error checking, and
6974 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6975 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6976 rather than timing out; this is used (in synchronous mode) to wait
6977 for a target that is is executing user code to stop. If FOREVER ==
6978 0, this function is allowed to time out gracefully and return an
6979 indication of this to the caller. Otherwise return the number of
6980 bytes read. If EXPECTING_NOTIF, consider receiving a notification
6981 enough reason to return to the caller. */
6984 getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf, int forever,
6985 int expecting_notif)
6987 struct remote_state *rs = get_remote_state ();
6993 /* We're reading a new response. Make sure we don't look at a
6994 previously cached response. */
6995 rs->cached_wait_status = 0;
6997 strcpy (*buf, "timeout");
7000 timeout = watchdog > 0 ? watchdog : -1;
7001 else if (expecting_notif)
7002 timeout = 0; /* There should already be a char in the buffer. If
7005 timeout = remote_timeout;
7009 /* Process any number of notifications, and then return when
7013 /* If we get a timeout or bad checksm, retry up to MAX_TRIES
7015 for (tries = 1; tries <= MAX_TRIES; tries++)
7017 /* This can loop forever if the remote side sends us
7018 characters continuously, but if it pauses, we'll get
7019 SERIAL_TIMEOUT from readchar because of timeout. Then
7020 we'll count that as a retry.
7022 Note that even when forever is set, we will only wait
7023 forever prior to the start of a packet. After that, we
7024 expect characters to arrive at a brisk pace. They should
7025 show up within remote_timeout intervals. */
7027 c = readchar (timeout);
7028 while (c != SERIAL_TIMEOUT && c != '$' && c != '%');
7030 if (c == SERIAL_TIMEOUT)
7032 if (expecting_notif)
7033 return -1; /* Don't complain, it's normal to not get
7034 anything in this case. */
7036 if (forever) /* Watchdog went off? Kill the target. */
7040 error (_("Watchdog timeout has expired. Target detached."));
7043 fputs_filtered ("Timed out.\n", gdb_stdlog);
7047 /* We've found the start of a packet or notification.
7048 Now collect the data. */
7049 val = read_frame (buf, sizeof_buf);
7054 serial_write (remote_desc, "-", 1);
7057 if (tries > MAX_TRIES)
7059 /* We have tried hard enough, and just can't receive the
7060 packet/notification. Give up. */
7061 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
7063 /* Skip the ack char if we're in no-ack mode. */
7064 if (!rs->noack_mode)
7065 serial_write (remote_desc, "+", 1);
7069 /* If we got an ordinary packet, return that to our caller. */
7074 struct cleanup *old_chain;
7077 str = escape_buffer (*buf, val);
7078 old_chain = make_cleanup (xfree, str);
7079 fprintf_unfiltered (gdb_stdlog, "Packet received: %s\n", str);
7080 do_cleanups (old_chain);
7083 /* Skip the ack char if we're in no-ack mode. */
7084 if (!rs->noack_mode)
7085 serial_write (remote_desc, "+", 1);
7089 /* If we got a notification, handle it, and go back to looking
7093 gdb_assert (c == '%');
7097 struct cleanup *old_chain;
7100 str = escape_buffer (*buf, val);
7101 old_chain = make_cleanup (xfree, str);
7102 fprintf_unfiltered (gdb_stdlog,
7103 " Notification received: %s\n",
7105 do_cleanups (old_chain);
7108 handle_notification (*buf, val);
7110 /* Notifications require no acknowledgement. */
7112 if (expecting_notif)
7119 getpkt_sane (char **buf, long *sizeof_buf, int forever)
7121 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 0);
7125 getpkt_or_notif_sane (char **buf, long *sizeof_buf, int forever)
7127 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 1);
7132 remote_kill (struct target_ops *ops)
7134 /* Use catch_errors so the user can quit from gdb even when we
7135 aren't on speaking terms with the remote system. */
7136 catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
7138 /* Don't wait for it to die. I'm not really sure it matters whether
7139 we do or not. For the existing stubs, kill is a noop. */
7140 target_mourn_inferior ();
7144 remote_vkill (int pid, struct remote_state *rs)
7146 if (remote_protocol_packets[PACKET_vKill].support == PACKET_DISABLE)
7149 /* Tell the remote target to detach. */
7150 sprintf (rs->buf, "vKill;%x", pid);
7152 getpkt (&rs->buf, &rs->buf_size, 0);
7154 if (packet_ok (rs->buf,
7155 &remote_protocol_packets[PACKET_vKill]) == PACKET_OK)
7157 else if (remote_protocol_packets[PACKET_vKill].support == PACKET_DISABLE)
7164 extended_remote_kill (struct target_ops *ops)
7167 int pid = ptid_get_pid (inferior_ptid);
7168 struct remote_state *rs = get_remote_state ();
7170 res = remote_vkill (pid, rs);
7171 if (res == -1 && !remote_multi_process_p (rs))
7173 /* Don't try 'k' on a multi-process aware stub -- it has no way
7174 to specify the pid. */
7178 getpkt (&rs->buf, &rs->buf_size, 0);
7179 if (rs->buf[0] != 'O' || rs->buf[0] != 'K')
7182 /* Don't wait for it to die. I'm not really sure it matters whether
7183 we do or not. For the existing stubs, kill is a noop. */
7189 error (_("Can't kill process"));
7191 target_mourn_inferior ();
7195 remote_mourn (struct target_ops *ops)
7197 remote_mourn_1 (ops);
7200 /* Worker function for remote_mourn. */
7202 remote_mourn_1 (struct target_ops *target)
7204 unpush_target (target);
7206 /* remote_close takes care of doing most of the clean up. */
7207 generic_mourn_inferior ();
7211 extended_remote_mourn_1 (struct target_ops *target)
7213 struct remote_state *rs = get_remote_state ();
7215 /* In case we got here due to an error, but we're going to stay
7217 rs->waiting_for_stop_reply = 0;
7219 /* We're no longer interested in these events. */
7220 discard_pending_stop_replies (ptid_get_pid (inferior_ptid));
7222 /* If the current general thread belonged to the process we just
7223 detached from or has exited, the remote side current general
7224 thread becomes undefined. Considering a case like this:
7226 - We just got here due to a detach.
7227 - The process that we're detaching from happens to immediately
7228 report a global breakpoint being hit in non-stop mode, in the
7229 same thread we had selected before.
7230 - GDB attaches to this process again.
7231 - This event happens to be the next event we handle.
7233 GDB would consider that the current general thread didn't need to
7234 be set on the stub side (with Hg), since for all it knew,
7235 GENERAL_THREAD hadn't changed.
7237 Notice that although in all-stop mode, the remote server always
7238 sets the current thread to the thread reporting the stop event,
7239 that doesn't happen in non-stop mode; in non-stop, the stub *must
7240 not* change the current thread when reporting a breakpoint hit,
7241 due to the decoupling of event reporting and event handling.
7243 To keep things simple, we always invalidate our notion of the
7245 record_currthread (minus_one_ptid);
7247 /* Unlike "target remote", we do not want to unpush the target; then
7248 the next time the user says "run", we won't be connected. */
7250 /* Call common code to mark the inferior as not running. */
7251 generic_mourn_inferior ();
7253 if (!have_inferiors ())
7255 if (!remote_multi_process_p (rs))
7257 /* Check whether the target is running now - some remote stubs
7258 automatically restart after kill. */
7260 getpkt (&rs->buf, &rs->buf_size, 0);
7262 if (rs->buf[0] == 'S' || rs->buf[0] == 'T')
7264 /* Assume that the target has been restarted. Set inferior_ptid
7265 so that bits of core GDB realizes there's something here, e.g.,
7266 so that the user can say "kill" again. */
7267 inferior_ptid = magic_null_ptid;
7274 extended_remote_mourn (struct target_ops *ops)
7276 extended_remote_mourn_1 (ops);
7280 extended_remote_run (char *args)
7282 struct remote_state *rs = get_remote_state ();
7285 /* If the user has disabled vRun support, or we have detected that
7286 support is not available, do not try it. */
7287 if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE)
7290 strcpy (rs->buf, "vRun;");
7291 len = strlen (rs->buf);
7293 if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ())
7294 error (_("Remote file name too long for run packet"));
7295 len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len, 0);
7297 gdb_assert (args != NULL);
7300 struct cleanup *back_to;
7304 argv = gdb_buildargv (args);
7305 back_to = make_cleanup ((void (*) (void *)) freeargv, argv);
7306 for (i = 0; argv[i] != NULL; i++)
7308 if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ())
7309 error (_("Argument list too long for run packet"));
7310 rs->buf[len++] = ';';
7311 len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len, 0);
7313 do_cleanups (back_to);
7316 rs->buf[len++] = '\0';
7319 getpkt (&rs->buf, &rs->buf_size, 0);
7321 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]) == PACKET_OK)
7323 /* We have a wait response; we don't need it, though. All is well. */
7326 else if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE)
7327 /* It wasn't disabled before, but it is now. */
7331 if (remote_exec_file[0] == '\0')
7332 error (_("Running the default executable on the remote target failed; "
7333 "try \"set remote exec-file\"?"));
7335 error (_("Running \"%s\" on the remote target failed"),
7340 /* In the extended protocol we want to be able to do things like
7341 "run" and have them basically work as expected. So we need
7342 a special create_inferior function. We support changing the
7343 executable file and the command line arguments, but not the
7347 extended_remote_create_inferior_1 (char *exec_file, char *args,
7348 char **env, int from_tty)
7350 /* If running asynchronously, register the target file descriptor
7351 with the event loop. */
7352 if (target_can_async_p ())
7353 target_async (inferior_event_handler, 0);
7355 /* Now restart the remote server. */
7356 if (extended_remote_run (args) == -1)
7358 /* vRun was not supported. Fail if we need it to do what the
7360 if (remote_exec_file[0])
7361 error (_("Remote target does not support \"set remote exec-file\""));
7363 error (_("Remote target does not support \"set args\" or run <ARGS>"));
7365 /* Fall back to "R". */
7366 extended_remote_restart ();
7369 if (!have_inferiors ())
7371 /* Clean up from the last time we ran, before we mark the target
7372 running again. This will mark breakpoints uninserted, and
7373 get_offsets may insert breakpoints. */
7374 init_thread_list ();
7375 init_wait_for_inferior ();
7378 /* Now mark the inferior as running before we do anything else. */
7379 inferior_ptid = magic_null_ptid;
7381 /* Now, if we have thread information, update inferior_ptid. */
7382 inferior_ptid = remote_current_thread (inferior_ptid);
7384 remote_add_inferior (ptid_get_pid (inferior_ptid), 0);
7385 add_thread_silent (inferior_ptid);
7387 /* Get updated offsets, if the stub uses qOffsets. */
7392 extended_remote_create_inferior (struct target_ops *ops,
7393 char *exec_file, char *args,
7394 char **env, int from_tty)
7396 extended_remote_create_inferior_1 (exec_file, args, env, from_tty);
7400 /* Insert a breakpoint. On targets that have software breakpoint
7401 support, we ask the remote target to do the work; on targets
7402 which don't, we insert a traditional memory breakpoint. */
7405 remote_insert_breakpoint (struct gdbarch *gdbarch,
7406 struct bp_target_info *bp_tgt)
7408 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
7409 If it succeeds, then set the support to PACKET_ENABLE. If it
7410 fails, and the user has explicitly requested the Z support then
7411 report an error, otherwise, mark it disabled and go on. */
7413 if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE)
7415 CORE_ADDR addr = bp_tgt->placed_address;
7416 struct remote_state *rs;
7420 gdbarch_remote_breakpoint_from_pc (gdbarch, &addr, &bpsize);
7422 rs = get_remote_state ();
7428 addr = (ULONGEST) remote_address_masked (addr);
7429 p += hexnumstr (p, addr);
7430 sprintf (p, ",%d", bpsize);
7433 getpkt (&rs->buf, &rs->buf_size, 0);
7435 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0]))
7440 bp_tgt->placed_address = addr;
7441 bp_tgt->placed_size = bpsize;
7443 case PACKET_UNKNOWN:
7448 return memory_insert_breakpoint (gdbarch, bp_tgt);
7452 remote_remove_breakpoint (struct gdbarch *gdbarch,
7453 struct bp_target_info *bp_tgt)
7455 CORE_ADDR addr = bp_tgt->placed_address;
7456 struct remote_state *rs = get_remote_state ();
7458 if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE)
7466 addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
7467 p += hexnumstr (p, addr);
7468 sprintf (p, ",%d", bp_tgt->placed_size);
7471 getpkt (&rs->buf, &rs->buf_size, 0);
7473 return (rs->buf[0] == 'E');
7476 return memory_remove_breakpoint (gdbarch, bp_tgt);
7480 watchpoint_to_Z_packet (int type)
7485 return Z_PACKET_WRITE_WP;
7488 return Z_PACKET_READ_WP;
7491 return Z_PACKET_ACCESS_WP;
7494 internal_error (__FILE__, __LINE__,
7495 _("hw_bp_to_z: bad watchpoint type %d"), type);
7500 remote_insert_watchpoint (CORE_ADDR addr, int len, int type)
7502 struct remote_state *rs = get_remote_state ();
7504 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
7506 if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE)
7509 sprintf (rs->buf, "Z%x,", packet);
7510 p = strchr (rs->buf, '\0');
7511 addr = remote_address_masked (addr);
7512 p += hexnumstr (p, (ULONGEST) addr);
7513 sprintf (p, ",%x", len);
7516 getpkt (&rs->buf, &rs->buf_size, 0);
7518 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
7522 case PACKET_UNKNOWN:
7527 internal_error (__FILE__, __LINE__,
7528 _("remote_insert_watchpoint: reached end of function"));
7533 remote_remove_watchpoint (CORE_ADDR addr, int len, int type)
7535 struct remote_state *rs = get_remote_state ();
7537 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
7539 if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE)
7542 sprintf (rs->buf, "z%x,", packet);
7543 p = strchr (rs->buf, '\0');
7544 addr = remote_address_masked (addr);
7545 p += hexnumstr (p, (ULONGEST) addr);
7546 sprintf (p, ",%x", len);
7548 getpkt (&rs->buf, &rs->buf_size, 0);
7550 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
7553 case PACKET_UNKNOWN:
7558 internal_error (__FILE__, __LINE__,
7559 _("remote_remove_watchpoint: reached end of function"));
7563 int remote_hw_watchpoint_limit = -1;
7564 int remote_hw_breakpoint_limit = -1;
7567 remote_check_watch_resources (int type, int cnt, int ot)
7569 if (type == bp_hardware_breakpoint)
7571 if (remote_hw_breakpoint_limit == 0)
7573 else if (remote_hw_breakpoint_limit < 0)
7575 else if (cnt <= remote_hw_breakpoint_limit)
7580 if (remote_hw_watchpoint_limit == 0)
7582 else if (remote_hw_watchpoint_limit < 0)
7586 else if (cnt <= remote_hw_watchpoint_limit)
7593 remote_stopped_by_watchpoint (void)
7595 return remote_stopped_by_watchpoint_p;
7599 remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
7603 if (remote_stopped_by_watchpoint ())
7605 *addr_p = remote_watch_data_address;
7614 remote_insert_hw_breakpoint (struct gdbarch *gdbarch,
7615 struct bp_target_info *bp_tgt)
7618 struct remote_state *rs;
7621 /* The length field should be set to the size of a breakpoint
7622 instruction, even though we aren't inserting one ourselves. */
7624 gdbarch_remote_breakpoint_from_pc
7625 (gdbarch, &bp_tgt->placed_address, &bp_tgt->placed_size);
7627 if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
7630 rs = get_remote_state ();
7637 addr = remote_address_masked (bp_tgt->placed_address);
7638 p += hexnumstr (p, (ULONGEST) addr);
7639 sprintf (p, ",%x", bp_tgt->placed_size);
7642 getpkt (&rs->buf, &rs->buf_size, 0);
7644 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
7647 case PACKET_UNKNOWN:
7652 internal_error (__FILE__, __LINE__,
7653 _("remote_insert_hw_breakpoint: reached end of function"));
7658 remote_remove_hw_breakpoint (struct gdbarch *gdbarch,
7659 struct bp_target_info *bp_tgt)
7662 struct remote_state *rs = get_remote_state ();
7665 if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
7672 addr = remote_address_masked (bp_tgt->placed_address);
7673 p += hexnumstr (p, (ULONGEST) addr);
7674 sprintf (p, ",%x", bp_tgt->placed_size);
7677 getpkt (&rs->buf, &rs->buf_size, 0);
7679 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
7682 case PACKET_UNKNOWN:
7687 internal_error (__FILE__, __LINE__,
7688 _("remote_remove_hw_breakpoint: reached end of function"));
7691 /* Table used by the crc32 function to calcuate the checksum. */
7693 static unsigned long crc32_table[256] =
7696 static unsigned long
7697 crc32 (const unsigned char *buf, int len, unsigned int crc)
7699 if (!crc32_table[1])
7701 /* Initialize the CRC table and the decoding table. */
7705 for (i = 0; i < 256; i++)
7707 for (c = i << 24, j = 8; j > 0; --j)
7708 c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
7715 crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255];
7721 /* Verify memory using the "qCRC:" request. */
7724 remote_verify_memory (struct target_ops *ops,
7725 const gdb_byte *data, CORE_ADDR lma, ULONGEST size)
7727 struct remote_state *rs = get_remote_state ();
7728 unsigned long host_crc, target_crc;
7731 /* FIXME: assumes lma can fit into long. */
7732 xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx",
7733 (long) lma, (long) size);
7736 /* Be clever; compute the host_crc before waiting for target
7738 host_crc = crc32 (data, size, 0xffffffff);
7740 getpkt (&rs->buf, &rs->buf_size, 0);
7741 if (rs->buf[0] == 'E')
7744 if (rs->buf[0] != 'C')
7745 error (_("remote target does not support this operation"));
7747 for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++)
7748 target_crc = target_crc * 16 + fromhex (*tmp);
7750 return (host_crc == target_crc);
7753 /* compare-sections command
7755 With no arguments, compares each loadable section in the exec bfd
7756 with the same memory range on the target, and reports mismatches.
7757 Useful for verifying the image on the target against the exec file. */
7760 compare_sections_command (char *args, int from_tty)
7763 struct cleanup *old_chain;
7765 const char *sectname;
7773 error (_("command cannot be used without an exec file"));
7775 for (s = exec_bfd->sections; s; s = s->next)
7777 if (!(s->flags & SEC_LOAD))
7778 continue; /* skip non-loadable section */
7780 size = bfd_get_section_size (s);
7782 continue; /* skip zero-length section */
7784 sectname = bfd_get_section_name (exec_bfd, s);
7785 if (args && strcmp (args, sectname) != 0)
7786 continue; /* not the section selected by user */
7788 matched = 1; /* do this section */
7791 sectdata = xmalloc (size);
7792 old_chain = make_cleanup (xfree, sectdata);
7793 bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
7795 res = target_verify_memory (sectdata, lma, size);
7798 error (_("target memory fault, section %s, range %s -- %s"), sectname,
7799 paddress (target_gdbarch, lma),
7800 paddress (target_gdbarch, lma + size));
7802 printf_filtered ("Section %s, range %s -- %s: ", sectname,
7803 paddress (target_gdbarch, lma),
7804 paddress (target_gdbarch, lma + size));
7806 printf_filtered ("matched.\n");
7809 printf_filtered ("MIS-MATCHED!\n");
7813 do_cleanups (old_chain);
7816 warning (_("One or more sections of the remote executable does not match\n\
7817 the loaded file\n"));
7818 if (args && !matched)
7819 printf_filtered (_("No loaded section named '%s'.\n"), args);
7822 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
7823 into remote target. The number of bytes written to the remote
7824 target is returned, or -1 for error. */
7827 remote_write_qxfer (struct target_ops *ops, const char *object_name,
7828 const char *annex, const gdb_byte *writebuf,
7829 ULONGEST offset, LONGEST len,
7830 struct packet_config *packet)
7834 struct remote_state *rs = get_remote_state ();
7835 int max_size = get_memory_write_packet_size ();
7837 if (packet->support == PACKET_DISABLE)
7840 /* Insert header. */
7841 i = snprintf (rs->buf, max_size,
7842 "qXfer:%s:write:%s:%s:",
7843 object_name, annex ? annex : "",
7844 phex_nz (offset, sizeof offset));
7845 max_size -= (i + 1);
7847 /* Escape as much data as fits into rs->buf. */
7848 buf_len = remote_escape_output
7849 (writebuf, len, (rs->buf + i), &max_size, max_size);
7851 if (putpkt_binary (rs->buf, i + buf_len) < 0
7852 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
7853 || packet_ok (rs->buf, packet) != PACKET_OK)
7856 unpack_varlen_hex (rs->buf, &n);
7860 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
7861 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
7862 number of bytes read is returned, or 0 for EOF, or -1 for error.
7863 The number of bytes read may be less than LEN without indicating an
7864 EOF. PACKET is checked and updated to indicate whether the remote
7865 target supports this object. */
7868 remote_read_qxfer (struct target_ops *ops, const char *object_name,
7870 gdb_byte *readbuf, ULONGEST offset, LONGEST len,
7871 struct packet_config *packet)
7873 static char *finished_object;
7874 static char *finished_annex;
7875 static ULONGEST finished_offset;
7877 struct remote_state *rs = get_remote_state ();
7878 LONGEST i, n, packet_len;
7880 if (packet->support == PACKET_DISABLE)
7883 /* Check whether we've cached an end-of-object packet that matches
7885 if (finished_object)
7887 if (strcmp (object_name, finished_object) == 0
7888 && strcmp (annex ? annex : "", finished_annex) == 0
7889 && offset == finished_offset)
7892 /* Otherwise, we're now reading something different. Discard
7894 xfree (finished_object);
7895 xfree (finished_annex);
7896 finished_object = NULL;
7897 finished_annex = NULL;
7900 /* Request only enough to fit in a single packet. The actual data
7901 may not, since we don't know how much of it will need to be escaped;
7902 the target is free to respond with slightly less data. We subtract
7903 five to account for the response type and the protocol frame. */
7904 n = min (get_remote_packet_size () - 5, len);
7905 snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
7906 object_name, annex ? annex : "",
7907 phex_nz (offset, sizeof offset),
7908 phex_nz (n, sizeof n));
7909 i = putpkt (rs->buf);
7914 packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0);
7915 if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK)
7918 if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
7919 error (_("Unknown remote qXfer reply: %s"), rs->buf);
7921 /* 'm' means there is (or at least might be) more data after this
7922 batch. That does not make sense unless there's at least one byte
7923 of data in this reply. */
7924 if (rs->buf[0] == 'm' && packet_len == 1)
7925 error (_("Remote qXfer reply contained no data."));
7927 /* Got some data. */
7928 i = remote_unescape_input (rs->buf + 1, packet_len - 1, readbuf, n);
7930 /* 'l' is an EOF marker, possibly including a final block of data,
7931 or possibly empty. If we have the final block of a non-empty
7932 object, record this fact to bypass a subsequent partial read. */
7933 if (rs->buf[0] == 'l' && offset + i > 0)
7935 finished_object = xstrdup (object_name);
7936 finished_annex = xstrdup (annex ? annex : "");
7937 finished_offset = offset + i;
7944 remote_xfer_partial (struct target_ops *ops, enum target_object object,
7945 const char *annex, gdb_byte *readbuf,
7946 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
7948 struct remote_state *rs;
7953 set_general_thread (inferior_ptid);
7955 rs = get_remote_state ();
7957 /* Handle memory using the standard memory routines. */
7958 if (object == TARGET_OBJECT_MEMORY)
7964 /* If the remote target is connected but not running, we should
7965 pass this request down to a lower stratum (e.g. the executable
7967 if (!target_has_execution)
7970 if (writebuf != NULL)
7971 xfered = remote_write_bytes (offset, writebuf, len);
7973 xfered = remote_read_bytes (offset, readbuf, len);
7977 else if (xfered == 0 && errno == 0)
7983 /* Handle SPU memory using qxfer packets. */
7984 if (object == TARGET_OBJECT_SPU)
7987 return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len,
7988 &remote_protocol_packets
7989 [PACKET_qXfer_spu_read]);
7991 return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len,
7992 &remote_protocol_packets
7993 [PACKET_qXfer_spu_write]);
7996 /* Handle extra signal info using qxfer packets. */
7997 if (object == TARGET_OBJECT_SIGNAL_INFO)
8000 return remote_read_qxfer (ops, "siginfo", annex, readbuf, offset, len,
8001 &remote_protocol_packets
8002 [PACKET_qXfer_siginfo_read]);
8004 return remote_write_qxfer (ops, "siginfo", annex, writebuf, offset, len,
8005 &remote_protocol_packets
8006 [PACKET_qXfer_siginfo_write]);
8009 /* Only handle flash writes. */
8010 if (writebuf != NULL)
8016 case TARGET_OBJECT_FLASH:
8017 xfered = remote_flash_write (ops, offset, len, writebuf);
8021 else if (xfered == 0 && errno == 0)
8031 /* Map pre-existing objects onto letters. DO NOT do this for new
8032 objects!!! Instead specify new query packets. */
8035 case TARGET_OBJECT_AVR:
8039 case TARGET_OBJECT_AUXV:
8040 gdb_assert (annex == NULL);
8041 return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len,
8042 &remote_protocol_packets[PACKET_qXfer_auxv]);
8044 case TARGET_OBJECT_AVAILABLE_FEATURES:
8045 return remote_read_qxfer
8046 (ops, "features", annex, readbuf, offset, len,
8047 &remote_protocol_packets[PACKET_qXfer_features]);
8049 case TARGET_OBJECT_LIBRARIES:
8050 return remote_read_qxfer
8051 (ops, "libraries", annex, readbuf, offset, len,
8052 &remote_protocol_packets[PACKET_qXfer_libraries]);
8054 case TARGET_OBJECT_MEMORY_MAP:
8055 gdb_assert (annex == NULL);
8056 return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len,
8057 &remote_protocol_packets[PACKET_qXfer_memory_map]);
8059 case TARGET_OBJECT_OSDATA:
8060 /* Should only get here if we're connected. */
8061 gdb_assert (remote_desc);
8062 return remote_read_qxfer
8063 (ops, "osdata", annex, readbuf, offset, len,
8064 &remote_protocol_packets[PACKET_qXfer_osdata]);
8066 case TARGET_OBJECT_THREADS:
8067 gdb_assert (annex == NULL);
8068 return remote_read_qxfer (ops, "threads", annex, readbuf, offset, len,
8069 &remote_protocol_packets[PACKET_qXfer_threads]);
8075 /* Note: a zero OFFSET and LEN can be used to query the minimum
8077 if (offset == 0 && len == 0)
8078 return (get_remote_packet_size ());
8079 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
8080 large enough let the caller deal with it. */
8081 if (len < get_remote_packet_size ())
8083 len = get_remote_packet_size ();
8085 /* Except for querying the minimum buffer size, target must be open. */
8087 error (_("remote query is only available after target open"));
8089 gdb_assert (annex != NULL);
8090 gdb_assert (readbuf != NULL);
8096 /* We used one buffer char for the remote protocol q command and
8097 another for the query type. As the remote protocol encapsulation
8098 uses 4 chars plus one extra in case we are debugging
8099 (remote_debug), we have PBUFZIZ - 7 left to pack the query
8102 while (annex[i] && (i < (get_remote_packet_size () - 8)))
8104 /* Bad caller may have sent forbidden characters. */
8105 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
8110 gdb_assert (annex[i] == '\0');
8112 i = putpkt (rs->buf);
8116 getpkt (&rs->buf, &rs->buf_size, 0);
8117 strcpy ((char *) readbuf, rs->buf);
8119 return strlen ((char *) readbuf);
8123 remote_search_memory (struct target_ops* ops,
8124 CORE_ADDR start_addr, ULONGEST search_space_len,
8125 const gdb_byte *pattern, ULONGEST pattern_len,
8126 CORE_ADDR *found_addrp)
8128 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
8129 struct remote_state *rs = get_remote_state ();
8130 int max_size = get_memory_write_packet_size ();
8131 struct packet_config *packet =
8132 &remote_protocol_packets[PACKET_qSearch_memory];
8133 /* number of packet bytes used to encode the pattern,
8134 this could be more than PATTERN_LEN due to escape characters */
8135 int escaped_pattern_len;
8136 /* amount of pattern that was encodable in the packet */
8137 int used_pattern_len;
8140 ULONGEST found_addr;
8142 /* Don't go to the target if we don't have to.
8143 This is done before checking packet->support to avoid the possibility that
8144 a success for this edge case means the facility works in general. */
8145 if (pattern_len > search_space_len)
8147 if (pattern_len == 0)
8149 *found_addrp = start_addr;
8153 /* If we already know the packet isn't supported, fall back to the simple
8154 way of searching memory. */
8156 if (packet->support == PACKET_DISABLE)
8158 /* Target doesn't provided special support, fall back and use the
8159 standard support (copy memory and do the search here). */
8160 return simple_search_memory (ops, start_addr, search_space_len,
8161 pattern, pattern_len, found_addrp);
8164 /* Insert header. */
8165 i = snprintf (rs->buf, max_size,
8166 "qSearch:memory:%s;%s;",
8167 phex_nz (start_addr, addr_size),
8168 phex_nz (search_space_len, sizeof (search_space_len)));
8169 max_size -= (i + 1);
8171 /* Escape as much data as fits into rs->buf. */
8172 escaped_pattern_len =
8173 remote_escape_output (pattern, pattern_len, (rs->buf + i),
8174 &used_pattern_len, max_size);
8176 /* Bail if the pattern is too large. */
8177 if (used_pattern_len != pattern_len)
8178 error ("Pattern is too large to transmit to remote target.");
8180 if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0
8181 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
8182 || packet_ok (rs->buf, packet) != PACKET_OK)
8184 /* The request may not have worked because the command is not
8185 supported. If so, fall back to the simple way. */
8186 if (packet->support == PACKET_DISABLE)
8188 return simple_search_memory (ops, start_addr, search_space_len,
8189 pattern, pattern_len, found_addrp);
8194 if (rs->buf[0] == '0')
8196 else if (rs->buf[0] == '1')
8199 if (rs->buf[1] != ',')
8200 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
8201 unpack_varlen_hex (rs->buf + 2, &found_addr);
8202 *found_addrp = found_addr;
8205 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
8211 remote_rcmd (char *command,
8212 struct ui_file *outbuf)
8214 struct remote_state *rs = get_remote_state ();
8218 error (_("remote rcmd is only available after target open"));
8220 /* Send a NULL command across as an empty command. */
8221 if (command == NULL)
8224 /* The query prefix. */
8225 strcpy (rs->buf, "qRcmd,");
8226 p = strchr (rs->buf, '\0');
8228 if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/) > get_remote_packet_size ())
8229 error (_("\"monitor\" command ``%s'' is too long."), command);
8231 /* Encode the actual command. */
8232 bin2hex ((gdb_byte *) command, p, 0);
8234 if (putpkt (rs->buf) < 0)
8235 error (_("Communication problem with target."));
8237 /* get/display the response */
8242 /* XXX - see also remote_get_noisy_reply(). */
8244 getpkt (&rs->buf, &rs->buf_size, 0);
8247 error (_("Target does not support this command."));
8248 if (buf[0] == 'O' && buf[1] != 'K')
8250 remote_console_output (buf + 1); /* 'O' message from stub. */
8253 if (strcmp (buf, "OK") == 0)
8255 if (strlen (buf) == 3 && buf[0] == 'E'
8256 && isdigit (buf[1]) && isdigit (buf[2]))
8258 error (_("Protocol error with Rcmd"));
8260 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
8262 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
8264 fputc_unfiltered (c, outbuf);
8270 static VEC(mem_region_s) *
8271 remote_memory_map (struct target_ops *ops)
8273 VEC(mem_region_s) *result = NULL;
8274 char *text = target_read_stralloc (¤t_target,
8275 TARGET_OBJECT_MEMORY_MAP, NULL);
8279 struct cleanup *back_to = make_cleanup (xfree, text);
8281 result = parse_memory_map (text);
8282 do_cleanups (back_to);
8289 packet_command (char *args, int from_tty)
8291 struct remote_state *rs = get_remote_state ();
8294 error (_("command can only be used with remote target"));
8297 error (_("remote-packet command requires packet text as argument"));
8299 puts_filtered ("sending: ");
8300 print_packet (args);
8301 puts_filtered ("\n");
8304 getpkt (&rs->buf, &rs->buf_size, 0);
8305 puts_filtered ("received: ");
8306 print_packet (rs->buf);
8307 puts_filtered ("\n");
8311 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
8313 static void display_thread_info (struct gdb_ext_thread_info *info);
8315 static void threadset_test_cmd (char *cmd, int tty);
8317 static void threadalive_test (char *cmd, int tty);
8319 static void threadlist_test_cmd (char *cmd, int tty);
8321 int get_and_display_threadinfo (threadref *ref);
8323 static void threadinfo_test_cmd (char *cmd, int tty);
8325 static int thread_display_step (threadref *ref, void *context);
8327 static void threadlist_update_test_cmd (char *cmd, int tty);
8329 static void init_remote_threadtests (void);
8331 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
8334 threadset_test_cmd (char *cmd, int tty)
8336 int sample_thread = SAMPLE_THREAD;
8338 printf_filtered (_("Remote threadset test\n"));
8339 set_general_thread (sample_thread);
8344 threadalive_test (char *cmd, int tty)
8346 int sample_thread = SAMPLE_THREAD;
8347 int pid = ptid_get_pid (inferior_ptid);
8348 ptid_t ptid = ptid_build (pid, 0, sample_thread);
8350 if (remote_thread_alive (ptid))
8351 printf_filtered ("PASS: Thread alive test\n");
8353 printf_filtered ("FAIL: Thread alive test\n");
8356 void output_threadid (char *title, threadref *ref);
8359 output_threadid (char *title, threadref *ref)
8363 pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
8365 printf_filtered ("%s %s\n", title, (&hexid[0]));
8369 threadlist_test_cmd (char *cmd, int tty)
8372 threadref nextthread;
8373 int done, result_count;
8374 threadref threadlist[3];
8376 printf_filtered ("Remote Threadlist test\n");
8377 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
8378 &result_count, &threadlist[0]))
8379 printf_filtered ("FAIL: threadlist test\n");
8382 threadref *scan = threadlist;
8383 threadref *limit = scan + result_count;
8385 while (scan < limit)
8386 output_threadid (" thread ", scan++);
8391 display_thread_info (struct gdb_ext_thread_info *info)
8393 output_threadid ("Threadid: ", &info->threadid);
8394 printf_filtered ("Name: %s\n ", info->shortname);
8395 printf_filtered ("State: %s\n", info->display);
8396 printf_filtered ("other: %s\n\n", info->more_display);
8400 get_and_display_threadinfo (threadref *ref)
8404 struct gdb_ext_thread_info threadinfo;
8406 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
8407 | TAG_MOREDISPLAY | TAG_DISPLAY;
8408 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
8409 display_thread_info (&threadinfo);
8414 threadinfo_test_cmd (char *cmd, int tty)
8416 int athread = SAMPLE_THREAD;
8420 int_to_threadref (&thread, athread);
8421 printf_filtered ("Remote Threadinfo test\n");
8422 if (!get_and_display_threadinfo (&thread))
8423 printf_filtered ("FAIL cannot get thread info\n");
8427 thread_display_step (threadref *ref, void *context)
8429 /* output_threadid(" threadstep ",ref); *//* simple test */
8430 return get_and_display_threadinfo (ref);
8434 threadlist_update_test_cmd (char *cmd, int tty)
8436 printf_filtered ("Remote Threadlist update test\n");
8437 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
8441 init_remote_threadtests (void)
8443 add_com ("tlist", class_obscure, threadlist_test_cmd, _("\
8444 Fetch and print the remote list of thread identifiers, one pkt only"));
8445 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
8446 _("Fetch and display info about one thread"));
8447 add_com ("tset", class_obscure, threadset_test_cmd,
8448 _("Test setting to a different thread"));
8449 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
8450 _("Iterate through updating all remote thread info"));
8451 add_com ("talive", class_obscure, threadalive_test,
8452 _(" Remote thread alive test "));
8457 /* Convert a thread ID to a string. Returns the string in a static
8461 remote_pid_to_str (struct target_ops *ops, ptid_t ptid)
8463 static char buf[64];
8464 struct remote_state *rs = get_remote_state ();
8466 if (ptid_is_pid (ptid))
8468 /* Printing an inferior target id. */
8470 /* When multi-process extensions are off, there's no way in the
8471 remote protocol to know the remote process id, if there's any
8472 at all. There's one exception --- when we're connected with
8473 target extended-remote, and we manually attached to a process
8474 with "attach PID". We don't record anywhere a flag that
8475 allows us to distinguish that case from the case of
8476 connecting with extended-remote and the stub already being
8477 attached to a process, and reporting yes to qAttached, hence
8478 no smart special casing here. */
8479 if (!remote_multi_process_p (rs))
8481 xsnprintf (buf, sizeof buf, "Remote target");
8485 return normal_pid_to_str (ptid);
8489 if (ptid_equal (magic_null_ptid, ptid))
8490 xsnprintf (buf, sizeof buf, "Thread <main>");
8491 else if (remote_multi_process_p (rs))
8492 xsnprintf (buf, sizeof buf, "Thread %d.%ld",
8493 ptid_get_pid (ptid), ptid_get_tid (ptid));
8495 xsnprintf (buf, sizeof buf, "Thread %ld",
8496 ptid_get_tid (ptid));
8501 /* Get the address of the thread local variable in OBJFILE which is
8502 stored at OFFSET within the thread local storage for thread PTID. */
8505 remote_get_thread_local_address (struct target_ops *ops,
8506 ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset)
8508 if (remote_protocol_packets[PACKET_qGetTLSAddr].support != PACKET_DISABLE)
8510 struct remote_state *rs = get_remote_state ();
8512 char *endp = rs->buf + get_remote_packet_size ();
8513 enum packet_result result;
8515 strcpy (p, "qGetTLSAddr:");
8517 p = write_ptid (p, endp, ptid);
8519 p += hexnumstr (p, offset);
8521 p += hexnumstr (p, lm);
8525 getpkt (&rs->buf, &rs->buf_size, 0);
8526 result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_qGetTLSAddr]);
8527 if (result == PACKET_OK)
8531 unpack_varlen_hex (rs->buf, &result);
8534 else if (result == PACKET_UNKNOWN)
8535 throw_error (TLS_GENERIC_ERROR,
8536 _("Remote target doesn't support qGetTLSAddr packet"));
8538 throw_error (TLS_GENERIC_ERROR,
8539 _("Remote target failed to process qGetTLSAddr request"));
8542 throw_error (TLS_GENERIC_ERROR,
8543 _("TLS not supported or disabled on this target"));
8548 /* Provide thread local base, i.e. Thread Information Block address.
8549 Returns 1 if ptid is found and thread_local_base is non zero. */
8552 remote_get_tib_address (ptid_t ptid, CORE_ADDR *addr)
8554 if (remote_protocol_packets[PACKET_qGetTIBAddr].support != PACKET_DISABLE)
8556 struct remote_state *rs = get_remote_state ();
8558 char *endp = rs->buf + get_remote_packet_size ();
8559 enum packet_result result;
8561 strcpy (p, "qGetTIBAddr:");
8563 p = write_ptid (p, endp, ptid);
8567 getpkt (&rs->buf, &rs->buf_size, 0);
8568 result = packet_ok (rs->buf,
8569 &remote_protocol_packets[PACKET_qGetTIBAddr]);
8570 if (result == PACKET_OK)
8574 unpack_varlen_hex (rs->buf, &result);
8576 *addr = (CORE_ADDR) result;
8579 else if (result == PACKET_UNKNOWN)
8580 error (_("Remote target doesn't support qGetTIBAddr packet"));
8582 error (_("Remote target failed to process qGetTIBAddr request"));
8585 error (_("qGetTIBAddr not supported or disabled on this target"));
8590 /* Support for inferring a target description based on the current
8591 architecture and the size of a 'g' packet. While the 'g' packet
8592 can have any size (since optional registers can be left off the
8593 end), some sizes are easily recognizable given knowledge of the
8594 approximate architecture. */
8596 struct remote_g_packet_guess
8599 const struct target_desc *tdesc;
8601 typedef struct remote_g_packet_guess remote_g_packet_guess_s;
8602 DEF_VEC_O(remote_g_packet_guess_s);
8604 struct remote_g_packet_data
8606 VEC(remote_g_packet_guess_s) *guesses;
8609 static struct gdbarch_data *remote_g_packet_data_handle;
8612 remote_g_packet_data_init (struct obstack *obstack)
8614 return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data);
8618 register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
8619 const struct target_desc *tdesc)
8621 struct remote_g_packet_data *data
8622 = gdbarch_data (gdbarch, remote_g_packet_data_handle);
8623 struct remote_g_packet_guess new_guess, *guess;
8626 gdb_assert (tdesc != NULL);
8629 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
8631 if (guess->bytes == bytes)
8632 internal_error (__FILE__, __LINE__,
8633 "Duplicate g packet description added for size %d",
8636 new_guess.bytes = bytes;
8637 new_guess.tdesc = tdesc;
8638 VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess);
8641 /* Return 1 if remote_read_description would do anything on this target
8642 and architecture, 0 otherwise. */
8645 remote_read_description_p (struct target_ops *target)
8647 struct remote_g_packet_data *data
8648 = gdbarch_data (target_gdbarch, remote_g_packet_data_handle);
8650 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
8656 static const struct target_desc *
8657 remote_read_description (struct target_ops *target)
8659 struct remote_g_packet_data *data
8660 = gdbarch_data (target_gdbarch, remote_g_packet_data_handle);
8662 /* Do not try this during initial connection, when we do not know
8663 whether there is a running but stopped thread. */
8664 if (!target_has_execution || ptid_equal (inferior_ptid, null_ptid))
8667 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
8669 struct remote_g_packet_guess *guess;
8671 int bytes = send_g_packet ();
8674 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
8676 if (guess->bytes == bytes)
8677 return guess->tdesc;
8679 /* We discard the g packet. A minor optimization would be to
8680 hold on to it, and fill the register cache once we have selected
8681 an architecture, but it's too tricky to do safely. */
8687 /* Remote file transfer support. This is host-initiated I/O, not
8688 target-initiated; for target-initiated, see remote-fileio.c. */
8690 /* If *LEFT is at least the length of STRING, copy STRING to
8691 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8692 decrease *LEFT. Otherwise raise an error. */
8695 remote_buffer_add_string (char **buffer, int *left, char *string)
8697 int len = strlen (string);
8700 error (_("Packet too long for target."));
8702 memcpy (*buffer, string, len);
8706 /* NUL-terminate the buffer as a convenience, if there is
8712 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
8713 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8714 decrease *LEFT. Otherwise raise an error. */
8717 remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
8720 if (2 * len > *left)
8721 error (_("Packet too long for target."));
8723 bin2hex (bytes, *buffer, len);
8727 /* NUL-terminate the buffer as a convenience, if there is
8733 /* If *LEFT is large enough, convert VALUE to hex and add it to
8734 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8735 decrease *LEFT. Otherwise raise an error. */
8738 remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
8740 int len = hexnumlen (value);
8743 error (_("Packet too long for target."));
8745 hexnumstr (*buffer, value);
8749 /* NUL-terminate the buffer as a convenience, if there is
8755 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
8756 value, *REMOTE_ERRNO to the remote error number or zero if none
8757 was included, and *ATTACHMENT to point to the start of the annex
8758 if any. The length of the packet isn't needed here; there may
8759 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
8761 Return 0 if the packet could be parsed, -1 if it could not. If
8762 -1 is returned, the other variables may not be initialized. */
8765 remote_hostio_parse_result (char *buffer, int *retcode,
8766 int *remote_errno, char **attachment)
8773 if (buffer[0] != 'F')
8777 *retcode = strtol (&buffer[1], &p, 16);
8778 if (errno != 0 || p == &buffer[1])
8781 /* Check for ",errno". */
8785 *remote_errno = strtol (p + 1, &p2, 16);
8786 if (errno != 0 || p + 1 == p2)
8791 /* Check for ";attachment". If there is no attachment, the
8792 packet should end here. */
8795 *attachment = p + 1;
8798 else if (*p == '\0')
8804 /* Send a prepared I/O packet to the target and read its response.
8805 The prepared packet is in the global RS->BUF before this function
8806 is called, and the answer is there when we return.
8808 COMMAND_BYTES is the length of the request to send, which may include
8809 binary data. WHICH_PACKET is the packet configuration to check
8810 before attempting a packet. If an error occurs, *REMOTE_ERRNO
8811 is set to the error number and -1 is returned. Otherwise the value
8812 returned by the function is returned.
8814 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
8815 attachment is expected; an error will be reported if there's a
8816 mismatch. If one is found, *ATTACHMENT will be set to point into
8817 the packet buffer and *ATTACHMENT_LEN will be set to the
8818 attachment's length. */
8821 remote_hostio_send_command (int command_bytes, int which_packet,
8822 int *remote_errno, char **attachment,
8823 int *attachment_len)
8825 struct remote_state *rs = get_remote_state ();
8826 int ret, bytes_read;
8827 char *attachment_tmp;
8830 || remote_protocol_packets[which_packet].support == PACKET_DISABLE)
8832 *remote_errno = FILEIO_ENOSYS;
8836 putpkt_binary (rs->buf, command_bytes);
8837 bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0);
8839 /* If it timed out, something is wrong. Don't try to parse the
8843 *remote_errno = FILEIO_EINVAL;
8847 switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
8850 *remote_errno = FILEIO_EINVAL;
8852 case PACKET_UNKNOWN:
8853 *remote_errno = FILEIO_ENOSYS;
8859 if (remote_hostio_parse_result (rs->buf, &ret, remote_errno,
8862 *remote_errno = FILEIO_EINVAL;
8866 /* Make sure we saw an attachment if and only if we expected one. */
8867 if ((attachment_tmp == NULL && attachment != NULL)
8868 || (attachment_tmp != NULL && attachment == NULL))
8870 *remote_errno = FILEIO_EINVAL;
8874 /* If an attachment was found, it must point into the packet buffer;
8875 work out how many bytes there were. */
8876 if (attachment_tmp != NULL)
8878 *attachment = attachment_tmp;
8879 *attachment_len = bytes_read - (*attachment - rs->buf);
8885 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
8886 remote file descriptor, or -1 if an error occurs (and set
8890 remote_hostio_open (const char *filename, int flags, int mode,
8893 struct remote_state *rs = get_remote_state ();
8895 int left = get_remote_packet_size () - 1;
8897 remote_buffer_add_string (&p, &left, "vFile:open:");
8899 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
8901 remote_buffer_add_string (&p, &left, ",");
8903 remote_buffer_add_int (&p, &left, flags);
8904 remote_buffer_add_string (&p, &left, ",");
8906 remote_buffer_add_int (&p, &left, mode);
8908 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open,
8909 remote_errno, NULL, NULL);
8912 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
8913 Return the number of bytes written, or -1 if an error occurs (and
8914 set *REMOTE_ERRNO). */
8917 remote_hostio_pwrite (int fd, const gdb_byte *write_buf, int len,
8918 ULONGEST offset, int *remote_errno)
8920 struct remote_state *rs = get_remote_state ();
8922 int left = get_remote_packet_size ();
8925 remote_buffer_add_string (&p, &left, "vFile:pwrite:");
8927 remote_buffer_add_int (&p, &left, fd);
8928 remote_buffer_add_string (&p, &left, ",");
8930 remote_buffer_add_int (&p, &left, offset);
8931 remote_buffer_add_string (&p, &left, ",");
8933 p += remote_escape_output (write_buf, len, p, &out_len,
8934 get_remote_packet_size () - (p - rs->buf));
8936 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite,
8937 remote_errno, NULL, NULL);
8940 /* Read up to LEN bytes FD on the remote target into READ_BUF
8941 Return the number of bytes read, or -1 if an error occurs (and
8942 set *REMOTE_ERRNO). */
8945 remote_hostio_pread (int fd, gdb_byte *read_buf, int len,
8946 ULONGEST offset, int *remote_errno)
8948 struct remote_state *rs = get_remote_state ();
8951 int left = get_remote_packet_size ();
8952 int ret, attachment_len;
8955 remote_buffer_add_string (&p, &left, "vFile:pread:");
8957 remote_buffer_add_int (&p, &left, fd);
8958 remote_buffer_add_string (&p, &left, ",");
8960 remote_buffer_add_int (&p, &left, len);
8961 remote_buffer_add_string (&p, &left, ",");
8963 remote_buffer_add_int (&p, &left, offset);
8965 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread,
8966 remote_errno, &attachment,
8972 read_len = remote_unescape_input (attachment, attachment_len,
8974 if (read_len != ret)
8975 error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
8980 /* Close FD on the remote target. Return 0, or -1 if an error occurs
8981 (and set *REMOTE_ERRNO). */
8984 remote_hostio_close (int fd, int *remote_errno)
8986 struct remote_state *rs = get_remote_state ();
8988 int left = get_remote_packet_size () - 1;
8990 remote_buffer_add_string (&p, &left, "vFile:close:");
8992 remote_buffer_add_int (&p, &left, fd);
8994 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close,
8995 remote_errno, NULL, NULL);
8998 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
8999 occurs (and set *REMOTE_ERRNO). */
9002 remote_hostio_unlink (const char *filename, int *remote_errno)
9004 struct remote_state *rs = get_remote_state ();
9006 int left = get_remote_packet_size () - 1;
9008 remote_buffer_add_string (&p, &left, "vFile:unlink:");
9010 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
9013 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink,
9014 remote_errno, NULL, NULL);
9018 remote_fileio_errno_to_host (int errnum)
9042 case FILEIO_ENOTDIR:
9062 case FILEIO_ENAMETOOLONG:
9063 return ENAMETOOLONG;
9069 remote_hostio_error (int errnum)
9071 int host_error = remote_fileio_errno_to_host (errnum);
9073 if (host_error == -1)
9074 error (_("Unknown remote I/O error %d"), errnum);
9076 error (_("Remote I/O error: %s"), safe_strerror (host_error));
9080 remote_hostio_close_cleanup (void *opaque)
9082 int fd = *(int *) opaque;
9085 remote_hostio_close (fd, &remote_errno);
9090 remote_bfd_iovec_open (struct bfd *abfd, void *open_closure)
9092 const char *filename = bfd_get_filename (abfd);
9093 int fd, remote_errno;
9096 gdb_assert (remote_filename_p (filename));
9098 fd = remote_hostio_open (filename + 7, FILEIO_O_RDONLY, 0, &remote_errno);
9101 errno = remote_fileio_errno_to_host (remote_errno);
9102 bfd_set_error (bfd_error_system_call);
9106 stream = xmalloc (sizeof (int));
9112 remote_bfd_iovec_close (struct bfd *abfd, void *stream)
9114 int fd = *(int *)stream;
9119 /* Ignore errors on close; these may happen if the remote
9120 connection was already torn down. */
9121 remote_hostio_close (fd, &remote_errno);
9127 remote_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf,
9128 file_ptr nbytes, file_ptr offset)
9130 int fd = *(int *)stream;
9132 file_ptr pos, bytes;
9135 while (nbytes > pos)
9137 bytes = remote_hostio_pread (fd, (char *)buf + pos, nbytes - pos,
9138 offset + pos, &remote_errno);
9140 /* Success, but no bytes, means end-of-file. */
9144 errno = remote_fileio_errno_to_host (remote_errno);
9145 bfd_set_error (bfd_error_system_call);
9156 remote_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb)
9158 /* FIXME: We should probably implement remote_hostio_stat. */
9159 sb->st_size = INT_MAX;
9164 remote_filename_p (const char *filename)
9166 return strncmp (filename, "remote:", 7) == 0;
9170 remote_bfd_open (const char *remote_file, const char *target)
9172 return bfd_openr_iovec (remote_file, target,
9173 remote_bfd_iovec_open, NULL,
9174 remote_bfd_iovec_pread,
9175 remote_bfd_iovec_close,
9176 remote_bfd_iovec_stat);
9180 remote_file_put (const char *local_file, const char *remote_file, int from_tty)
9182 struct cleanup *back_to, *close_cleanup;
9183 int retcode, fd, remote_errno, bytes, io_size;
9186 int bytes_in_buffer;
9191 error (_("command can only be used with remote target"));
9193 file = fopen (local_file, "rb");
9195 perror_with_name (local_file);
9196 back_to = make_cleanup_fclose (file);
9198 fd = remote_hostio_open (remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
9200 0700, &remote_errno);
9202 remote_hostio_error (remote_errno);
9204 /* Send up to this many bytes at once. They won't all fit in the
9205 remote packet limit, so we'll transfer slightly fewer. */
9206 io_size = get_remote_packet_size ();
9207 buffer = xmalloc (io_size);
9208 make_cleanup (xfree, buffer);
9210 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
9212 bytes_in_buffer = 0;
9215 while (bytes_in_buffer || !saw_eof)
9219 bytes = fread (buffer + bytes_in_buffer, 1, io_size - bytes_in_buffer,
9224 error (_("Error reading %s."), local_file);
9227 /* EOF. Unless there is something still in the
9228 buffer from the last iteration, we are done. */
9230 if (bytes_in_buffer == 0)
9238 bytes += bytes_in_buffer;
9239 bytes_in_buffer = 0;
9241 retcode = remote_hostio_pwrite (fd, buffer, bytes, offset, &remote_errno);
9244 remote_hostio_error (remote_errno);
9245 else if (retcode == 0)
9246 error (_("Remote write of %d bytes returned 0!"), bytes);
9247 else if (retcode < bytes)
9249 /* Short write. Save the rest of the read data for the next
9251 bytes_in_buffer = bytes - retcode;
9252 memmove (buffer, buffer + retcode, bytes_in_buffer);
9258 discard_cleanups (close_cleanup);
9259 if (remote_hostio_close (fd, &remote_errno))
9260 remote_hostio_error (remote_errno);
9263 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
9264 do_cleanups (back_to);
9268 remote_file_get (const char *remote_file, const char *local_file, int from_tty)
9270 struct cleanup *back_to, *close_cleanup;
9271 int fd, remote_errno, bytes, io_size;
9277 error (_("command can only be used with remote target"));
9279 fd = remote_hostio_open (remote_file, FILEIO_O_RDONLY, 0, &remote_errno);
9281 remote_hostio_error (remote_errno);
9283 file = fopen (local_file, "wb");
9285 perror_with_name (local_file);
9286 back_to = make_cleanup_fclose (file);
9288 /* Send up to this many bytes at once. They won't all fit in the
9289 remote packet limit, so we'll transfer slightly fewer. */
9290 io_size = get_remote_packet_size ();
9291 buffer = xmalloc (io_size);
9292 make_cleanup (xfree, buffer);
9294 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
9299 bytes = remote_hostio_pread (fd, buffer, io_size, offset, &remote_errno);
9301 /* Success, but no bytes, means end-of-file. */
9304 remote_hostio_error (remote_errno);
9308 bytes = fwrite (buffer, 1, bytes, file);
9310 perror_with_name (local_file);
9313 discard_cleanups (close_cleanup);
9314 if (remote_hostio_close (fd, &remote_errno))
9315 remote_hostio_error (remote_errno);
9318 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
9319 do_cleanups (back_to);
9323 remote_file_delete (const char *remote_file, int from_tty)
9325 int retcode, remote_errno;
9328 error (_("command can only be used with remote target"));
9330 retcode = remote_hostio_unlink (remote_file, &remote_errno);
9332 remote_hostio_error (remote_errno);
9335 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
9339 remote_put_command (char *args, int from_tty)
9341 struct cleanup *back_to;
9345 error_no_arg (_("file to put"));
9347 argv = gdb_buildargv (args);
9348 back_to = make_cleanup_freeargv (argv);
9349 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
9350 error (_("Invalid parameters to remote put"));
9352 remote_file_put (argv[0], argv[1], from_tty);
9354 do_cleanups (back_to);
9358 remote_get_command (char *args, int from_tty)
9360 struct cleanup *back_to;
9364 error_no_arg (_("file to get"));
9366 argv = gdb_buildargv (args);
9367 back_to = make_cleanup_freeargv (argv);
9368 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
9369 error (_("Invalid parameters to remote get"));
9371 remote_file_get (argv[0], argv[1], from_tty);
9373 do_cleanups (back_to);
9377 remote_delete_command (char *args, int from_tty)
9379 struct cleanup *back_to;
9383 error_no_arg (_("file to delete"));
9385 argv = gdb_buildargv (args);
9386 back_to = make_cleanup_freeargv (argv);
9387 if (argv[0] == NULL || argv[1] != NULL)
9388 error (_("Invalid parameters to remote delete"));
9390 remote_file_delete (argv[0], from_tty);
9392 do_cleanups (back_to);
9396 remote_command (char *args, int from_tty)
9398 help_list (remote_cmdlist, "remote ", -1, gdb_stdout);
9402 remote_can_execute_reverse (void)
9404 if (remote_protocol_packets[PACKET_bs].support == PACKET_ENABLE
9405 || remote_protocol_packets[PACKET_bc].support == PACKET_ENABLE)
9412 remote_supports_non_stop (void)
9418 remote_supports_multi_process (void)
9420 struct remote_state *rs = get_remote_state ();
9422 return remote_multi_process_p (rs);
9426 remote_supports_cond_tracepoints (void)
9428 struct remote_state *rs = get_remote_state ();
9430 return rs->cond_tracepoints;
9434 remote_supports_fast_tracepoints (void)
9436 struct remote_state *rs = get_remote_state ();
9438 return rs->fast_tracepoints;
9442 remote_trace_init (void)
9445 remote_get_noisy_reply (&target_buf, &target_buf_size);
9446 if (strcmp (target_buf, "OK") != 0)
9447 error (_("Target does not support this command."));
9450 static void free_actions_list (char **actions_list);
9451 static void free_actions_list_cleanup_wrapper (void *);
9453 free_actions_list_cleanup_wrapper (void *al)
9455 free_actions_list (al);
9459 free_actions_list (char **actions_list)
9463 if (actions_list == 0)
9466 for (ndx = 0; actions_list[ndx]; ndx++)
9467 xfree (actions_list[ndx]);
9469 xfree (actions_list);
9472 /* Recursive routine to walk through command list including loops, and
9473 download packets for each command. */
9476 remote_download_command_source (int num, ULONGEST addr,
9477 struct command_line *cmds)
9479 struct remote_state *rs = get_remote_state ();
9480 struct command_line *cmd;
9482 for (cmd = cmds; cmd; cmd = cmd->next)
9484 QUIT; /* allow user to bail out with ^C */
9485 strcpy (rs->buf, "QTDPsrc:");
9486 encode_source_string (num, addr, "cmd", cmd->line,
9487 rs->buf + strlen (rs->buf),
9488 rs->buf_size - strlen (rs->buf));
9490 remote_get_noisy_reply (&target_buf, &target_buf_size);
9491 if (strcmp (target_buf, "OK"))
9492 warning (_("Target does not support source download."));
9494 if (cmd->control_type == while_control
9495 || cmd->control_type == while_stepping_control)
9497 remote_download_command_source (num, addr, *cmd->body_list);
9499 QUIT; /* allow user to bail out with ^C */
9500 strcpy (rs->buf, "QTDPsrc:");
9501 encode_source_string (num, addr, "cmd", "end",
9502 rs->buf + strlen (rs->buf),
9503 rs->buf_size - strlen (rs->buf));
9505 remote_get_noisy_reply (&target_buf, &target_buf_size);
9506 if (strcmp (target_buf, "OK"))
9507 warning (_("Target does not support source download."));
9513 remote_download_tracepoint (struct breakpoint *t)
9515 struct bp_location *loc;
9520 char **stepping_actions;
9522 struct cleanup *old_chain = NULL;
9523 struct agent_expr *aexpr;
9524 struct cleanup *aexpr_chain = NULL;
9527 /* Iterate over all the tracepoint locations. It's up to the target to
9528 notice multiple tracepoint packets with the same number but different
9529 addresses, and treat them as multiple locations. */
9530 for (loc = t->loc; loc; loc = loc->next)
9532 encode_actions (t, loc, &tdp_actions, &stepping_actions);
9533 old_chain = make_cleanup (free_actions_list_cleanup_wrapper,
9535 (void) make_cleanup (free_actions_list_cleanup_wrapper, stepping_actions);
9537 tpaddr = loc->address;
9538 sprintf_vma (addrbuf, tpaddr);
9539 sprintf (buf, "QTDP:%x:%s:%c:%lx:%x", t->number,
9540 addrbuf, /* address */
9541 (t->enable_state == bp_enabled ? 'E' : 'D'),
9542 t->step_count, t->pass_count);
9543 /* Fast tracepoints are mostly handled by the target, but we can
9544 tell the target how big of an instruction block should be moved
9546 if (t->type == bp_fast_tracepoint)
9548 /* Only test for support at download time; we may not know
9549 target capabilities at definition time. */
9550 if (remote_supports_fast_tracepoints ())
9554 if (gdbarch_fast_tracepoint_valid_at (target_gdbarch,
9555 tpaddr, &isize, NULL))
9556 sprintf (buf + strlen (buf), ":F%x", isize);
9558 /* If it passed validation at definition but fails now,
9559 something is very wrong. */
9560 internal_error (__FILE__, __LINE__,
9561 "Fast tracepoint not valid during download");
9564 /* Fast tracepoints are functionally identical to regular
9565 tracepoints, so don't take lack of support as a reason to
9566 give up on the trace run. */
9567 warning (_("Target does not support fast tracepoints, downloading %d as regular tracepoint"), t->number);
9569 /* If the tracepoint has a conditional, make it into an agent
9570 expression and append to the definition. */
9573 /* Only test support at download time, we may not know target
9574 capabilities at definition time. */
9575 if (remote_supports_cond_tracepoints ())
9577 aexpr = gen_eval_for_expr (tpaddr, loc->cond);
9578 aexpr_chain = make_cleanup_free_agent_expr (aexpr);
9579 sprintf (buf + strlen (buf), ":X%x,", aexpr->len);
9580 pkt = buf + strlen (buf);
9581 for (ndx = 0; ndx < aexpr->len; ++ndx)
9582 pkt = pack_hex_byte (pkt, aexpr->buf[ndx]);
9584 do_cleanups (aexpr_chain);
9587 warning (_("Target does not support conditional tracepoints, ignoring tp %d cond"), t->number);
9590 if (t->commands || *default_collect)
9593 remote_get_noisy_reply (&target_buf, &target_buf_size);
9594 if (strcmp (target_buf, "OK"))
9595 error (_("Target does not support tracepoints."));
9597 /* do_single_steps (t); */
9600 for (ndx = 0; tdp_actions[ndx]; ndx++)
9602 QUIT; /* allow user to bail out with ^C */
9603 sprintf (buf, "QTDP:-%x:%s:%s%c",
9604 t->number, addrbuf, /* address */
9606 ((tdp_actions[ndx + 1] || stepping_actions)
9609 remote_get_noisy_reply (&target_buf,
9611 if (strcmp (target_buf, "OK"))
9612 error (_("Error on target while setting tracepoints."));
9615 if (stepping_actions)
9617 for (ndx = 0; stepping_actions[ndx]; ndx++)
9619 QUIT; /* allow user to bail out with ^C */
9620 sprintf (buf, "QTDP:-%x:%s:%s%s%s",
9621 t->number, addrbuf, /* address */
9622 ((ndx == 0) ? "S" : ""),
9623 stepping_actions[ndx],
9624 (stepping_actions[ndx + 1] ? "-" : ""));
9626 remote_get_noisy_reply (&target_buf,
9628 if (strcmp (target_buf, "OK"))
9629 error (_("Error on target while setting tracepoints."));
9633 if (remote_protocol_packets[PACKET_TracepointSource].support == PACKET_ENABLE)
9637 strcpy (buf, "QTDPsrc:");
9638 encode_source_string (t->number, loc->address,
9639 "at", t->addr_string, buf + strlen (buf),
9640 2048 - strlen (buf));
9643 remote_get_noisy_reply (&target_buf, &target_buf_size);
9644 if (strcmp (target_buf, "OK"))
9645 warning (_("Target does not support source download."));
9649 strcpy (buf, "QTDPsrc:");
9650 encode_source_string (t->number, loc->address,
9651 "cond", t->cond_string, buf + strlen (buf),
9652 2048 - strlen (buf));
9654 remote_get_noisy_reply (&target_buf, &target_buf_size);
9655 if (strcmp (target_buf, "OK"))
9656 warning (_("Target does not support source download."));
9658 remote_download_command_source (t->number, loc->address,
9659 breakpoint_commands (t));
9662 do_cleanups (old_chain);
9667 remote_download_trace_state_variable (struct trace_state_variable *tsv)
9669 struct remote_state *rs = get_remote_state ();
9672 sprintf (rs->buf, "QTDV:%x:%s:%x:",
9673 tsv->number, phex ((ULONGEST) tsv->initial_value, 8), tsv->builtin);
9674 p = rs->buf + strlen (rs->buf);
9675 if ((p - rs->buf) + strlen (tsv->name) * 2 >= get_remote_packet_size ())
9676 error (_("Trace state variable name too long for tsv definition packet"));
9677 p += 2 * bin2hex ((gdb_byte *) (tsv->name), p, 0);
9680 remote_get_noisy_reply (&target_buf, &target_buf_size);
9681 if (*target_buf == '\0')
9682 error (_("Target does not support this command."));
9683 if (strcmp (target_buf, "OK") != 0)
9684 error (_("Error on target while downloading trace state variable."));
9688 remote_trace_set_readonly_regions (void)
9696 return; /* No information to give. */
9698 strcpy (target_buf, "QTro");
9699 for (s = exec_bfd->sections; s; s = s->next)
9701 char tmp1[40], tmp2[40];
9703 if ((s->flags & SEC_LOAD) == 0 ||
9704 /* (s->flags & SEC_CODE) == 0 || */
9705 (s->flags & SEC_READONLY) == 0)
9710 size = bfd_get_section_size (s);
9711 sprintf_vma (tmp1, lma);
9712 sprintf_vma (tmp2, lma + size);
9713 sprintf (target_buf + strlen (target_buf),
9714 ":%s,%s", tmp1, tmp2);
9718 putpkt (target_buf);
9719 getpkt (&target_buf, &target_buf_size, 0);
9724 remote_trace_start (void)
9727 remote_get_noisy_reply (&target_buf, &target_buf_size);
9728 if (*target_buf == '\0')
9729 error (_("Target does not support this command."));
9730 if (strcmp (target_buf, "OK") != 0)
9731 error (_("Bogus reply from target: %s"), target_buf);
9735 remote_get_trace_status (struct trace_status *ts)
9738 /* FIXME we need to get register block size some other way */
9739 extern int trace_regblock_size;
9741 trace_regblock_size = get_remote_arch_state ()->sizeof_g_packet;
9743 putpkt ("qTStatus");
9744 p = remote_get_noisy_reply (&target_buf, &target_buf_size);
9746 /* If the remote target doesn't do tracing, flag it. */
9750 /* We're working with a live target. */
9753 /* Set some defaults. */
9754 ts->running_known = 0;
9755 ts->stop_reason = trace_stop_reason_unknown;
9756 ts->traceframe_count = -1;
9757 ts->buffer_free = 0;
9760 error (_("Bogus trace status reply from target: %s"), target_buf);
9762 parse_trace_status (p, ts);
9768 remote_trace_stop (void)
9771 remote_get_noisy_reply (&target_buf, &target_buf_size);
9772 if (*target_buf == '\0')
9773 error (_("Target does not support this command."));
9774 if (strcmp (target_buf, "OK") != 0)
9775 error (_("Bogus reply from target: %s"), target_buf);
9779 remote_trace_find (enum trace_find_type type, int num,
9780 ULONGEST addr1, ULONGEST addr2,
9783 struct remote_state *rs = get_remote_state ();
9785 int target_frameno = -1, target_tracept = -1;
9788 strcpy (p, "QTFrame:");
9789 p = strchr (p, '\0');
9793 sprintf (p, "%x", num);
9796 sprintf (p, "pc:%s", phex_nz (addr1, 0));
9799 sprintf (p, "tdp:%x", num);
9802 sprintf (p, "range:%s:%s", phex_nz (addr1, 0), phex_nz (addr2, 0));
9805 sprintf (p, "outside:%s:%s", phex_nz (addr1, 0), phex_nz (addr2, 0));
9808 error ("Unknown trace find type %d", type);
9812 reply = remote_get_noisy_reply (&(rs->buf), &sizeof_pkt);
9814 error (_("Target does not support this command."));
9816 while (reply && *reply)
9821 target_frameno = (int) strtol (p, &reply, 16);
9823 error (_("Unable to parse trace frame number"));
9824 if (target_frameno == -1)
9829 target_tracept = (int) strtol (p, &reply, 16);
9831 error (_("Unable to parse tracepoint number"));
9833 case 'O': /* "OK"? */
9834 if (reply[1] == 'K' && reply[2] == '\0')
9837 error (_("Bogus reply from target: %s"), reply);
9840 error (_("Bogus reply from target: %s"), reply);
9843 *tpp = target_tracept;
9844 return target_frameno;
9848 remote_get_trace_state_variable_value (int tsvnum, LONGEST *val)
9850 struct remote_state *rs = get_remote_state ();
9854 sprintf (rs->buf, "qTV:%x", tsvnum);
9856 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
9857 if (reply && *reply)
9861 unpack_varlen_hex (reply + 1, &uval);
9862 *val = (LONGEST) uval;
9870 remote_save_trace_data (const char *filename)
9872 struct remote_state *rs = get_remote_state ();
9876 strcpy (p, "QTSave:");
9878 if ((p - rs->buf) + strlen (filename) * 2 >= get_remote_packet_size ())
9879 error (_("Remote file name too long for trace save packet"));
9880 p += 2 * bin2hex ((gdb_byte *) filename, p, 0);
9883 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
9885 error (_("Target does not support this command."));
9886 if (strcmp (reply, "OK") != 0)
9887 error (_("Bogus reply from target: %s"), reply);
9891 /* This is basically a memory transfer, but needs to be its own packet
9892 because we don't know how the target actually organizes its trace
9893 memory, plus we want to be able to ask for as much as possible, but
9894 not be unhappy if we don't get as much as we ask for. */
9897 remote_get_raw_trace_data (gdb_byte *buf, ULONGEST offset, LONGEST len)
9899 struct remote_state *rs = get_remote_state ();
9905 strcpy (p, "qTBuffer:");
9907 p += hexnumstr (p, offset);
9909 p += hexnumstr (p, len);
9913 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
9914 if (reply && *reply)
9916 /* 'l' by itself means we're at the end of the buffer and
9917 there is nothing more to get. */
9921 /* Convert the reply into binary. Limit the number of bytes to
9922 convert according to our passed-in buffer size, rather than
9923 what was returned in the packet; if the target is
9924 unexpectedly generous and gives us a bigger reply than we
9925 asked for, we don't want to crash. */
9926 rslt = hex2bin (target_buf, buf, len);
9930 /* Something went wrong, flag as an error. */
9935 remote_set_disconnected_tracing (int val)
9937 struct remote_state *rs = get_remote_state ();
9939 if (rs->disconnected_tracing)
9943 sprintf (rs->buf, "QTDisconnected:%x", val);
9945 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
9947 error (_("Target does not support this command."));
9948 if (strcmp (reply, "OK") != 0)
9949 error (_("Bogus reply from target: %s"), reply);
9952 warning (_("Target does not support disconnected tracing."));
9956 remote_core_of_thread (struct target_ops *ops, ptid_t ptid)
9958 struct thread_info *info = find_thread_ptid (ptid);
9960 if (info && info->private)
9961 return info->private->core;
9966 remote_set_circular_trace_buffer (int val)
9968 struct remote_state *rs = get_remote_state ();
9971 sprintf (rs->buf, "QTBuffer:circular:%x", val);
9973 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
9975 error (_("Target does not support this command."));
9976 if (strcmp (reply, "OK") != 0)
9977 error (_("Bogus reply from target: %s"), reply);
9981 init_remote_ops (void)
9983 remote_ops.to_shortname = "remote";
9984 remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
9986 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
9987 Specify the serial device it is connected to\n\
9988 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
9989 remote_ops.to_open = remote_open;
9990 remote_ops.to_close = remote_close;
9991 remote_ops.to_detach = remote_detach;
9992 remote_ops.to_disconnect = remote_disconnect;
9993 remote_ops.to_resume = remote_resume;
9994 remote_ops.to_wait = remote_wait;
9995 remote_ops.to_fetch_registers = remote_fetch_registers;
9996 remote_ops.to_store_registers = remote_store_registers;
9997 remote_ops.to_prepare_to_store = remote_prepare_to_store;
9998 remote_ops.deprecated_xfer_memory = remote_xfer_memory;
9999 remote_ops.to_files_info = remote_files_info;
10000 remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
10001 remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
10002 remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
10003 remote_ops.to_stopped_data_address = remote_stopped_data_address;
10004 remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
10005 remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
10006 remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
10007 remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
10008 remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
10009 remote_ops.to_kill = remote_kill;
10010 remote_ops.to_load = generic_load;
10011 remote_ops.to_mourn_inferior = remote_mourn;
10012 remote_ops.to_notice_signals = remote_notice_signals;
10013 remote_ops.to_thread_alive = remote_thread_alive;
10014 remote_ops.to_find_new_threads = remote_threads_info;
10015 remote_ops.to_pid_to_str = remote_pid_to_str;
10016 remote_ops.to_extra_thread_info = remote_threads_extra_info;
10017 remote_ops.to_get_ada_task_ptid = remote_get_ada_task_ptid;
10018 remote_ops.to_stop = remote_stop;
10019 remote_ops.to_xfer_partial = remote_xfer_partial;
10020 remote_ops.to_rcmd = remote_rcmd;
10021 remote_ops.to_log_command = serial_log_command;
10022 remote_ops.to_get_thread_local_address = remote_get_thread_local_address;
10023 remote_ops.to_stratum = process_stratum;
10024 remote_ops.to_has_all_memory = default_child_has_all_memory;
10025 remote_ops.to_has_memory = default_child_has_memory;
10026 remote_ops.to_has_stack = default_child_has_stack;
10027 remote_ops.to_has_registers = default_child_has_registers;
10028 remote_ops.to_has_execution = default_child_has_execution;
10029 remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
10030 remote_ops.to_can_execute_reverse = remote_can_execute_reverse;
10031 remote_ops.to_magic = OPS_MAGIC;
10032 remote_ops.to_memory_map = remote_memory_map;
10033 remote_ops.to_flash_erase = remote_flash_erase;
10034 remote_ops.to_flash_done = remote_flash_done;
10035 remote_ops.to_read_description = remote_read_description;
10036 remote_ops.to_search_memory = remote_search_memory;
10037 remote_ops.to_can_async_p = remote_can_async_p;
10038 remote_ops.to_is_async_p = remote_is_async_p;
10039 remote_ops.to_async = remote_async;
10040 remote_ops.to_async_mask = remote_async_mask;
10041 remote_ops.to_terminal_inferior = remote_terminal_inferior;
10042 remote_ops.to_terminal_ours = remote_terminal_ours;
10043 remote_ops.to_supports_non_stop = remote_supports_non_stop;
10044 remote_ops.to_supports_multi_process = remote_supports_multi_process;
10045 remote_ops.to_trace_init = remote_trace_init;
10046 remote_ops.to_download_tracepoint = remote_download_tracepoint;
10047 remote_ops.to_download_trace_state_variable = remote_download_trace_state_variable;
10048 remote_ops.to_trace_set_readonly_regions = remote_trace_set_readonly_regions;
10049 remote_ops.to_trace_start = remote_trace_start;
10050 remote_ops.to_get_trace_status = remote_get_trace_status;
10051 remote_ops.to_trace_stop = remote_trace_stop;
10052 remote_ops.to_trace_find = remote_trace_find;
10053 remote_ops.to_get_trace_state_variable_value = remote_get_trace_state_variable_value;
10054 remote_ops.to_save_trace_data = remote_save_trace_data;
10055 remote_ops.to_upload_tracepoints = remote_upload_tracepoints;
10056 remote_ops.to_upload_trace_state_variables = remote_upload_trace_state_variables;
10057 remote_ops.to_get_raw_trace_data = remote_get_raw_trace_data;
10058 remote_ops.to_set_disconnected_tracing = remote_set_disconnected_tracing;
10059 remote_ops.to_set_circular_trace_buffer = remote_set_circular_trace_buffer;
10060 remote_ops.to_core_of_thread = remote_core_of_thread;
10061 remote_ops.to_verify_memory = remote_verify_memory;
10062 remote_ops.to_get_tib_address = remote_get_tib_address;
10065 /* Set up the extended remote vector by making a copy of the standard
10066 remote vector and adding to it. */
10069 init_extended_remote_ops (void)
10071 extended_remote_ops = remote_ops;
10073 extended_remote_ops.to_shortname = "extended-remote";
10074 extended_remote_ops.to_longname =
10075 "Extended remote serial target in gdb-specific protocol";
10076 extended_remote_ops.to_doc =
10077 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
10078 Specify the serial device it is connected to (e.g. /dev/ttya).";
10079 extended_remote_ops.to_open = extended_remote_open;
10080 extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
10081 extended_remote_ops.to_mourn_inferior = extended_remote_mourn;
10082 extended_remote_ops.to_detach = extended_remote_detach;
10083 extended_remote_ops.to_attach = extended_remote_attach;
10084 extended_remote_ops.to_kill = extended_remote_kill;
10088 remote_can_async_p (void)
10090 if (!target_async_permitted)
10091 /* We only enable async when the user specifically asks for it. */
10094 /* We're async whenever the serial device is. */
10095 return remote_async_mask_value && serial_can_async_p (remote_desc);
10099 remote_is_async_p (void)
10101 if (!target_async_permitted)
10102 /* We only enable async when the user specifically asks for it. */
10105 /* We're async whenever the serial device is. */
10106 return remote_async_mask_value && serial_is_async_p (remote_desc);
10109 /* Pass the SERIAL event on and up to the client. One day this code
10110 will be able to delay notifying the client of an event until the
10111 point where an entire packet has been received. */
10113 static void (*async_client_callback) (enum inferior_event_type event_type,
10115 static void *async_client_context;
10116 static serial_event_ftype remote_async_serial_handler;
10119 remote_async_serial_handler (struct serial *scb, void *context)
10121 /* Don't propogate error information up to the client. Instead let
10122 the client find out about the error by querying the target. */
10123 async_client_callback (INF_REG_EVENT, async_client_context);
10127 remote_async_inferior_event_handler (gdb_client_data data)
10129 inferior_event_handler (INF_REG_EVENT, NULL);
10133 remote_async_get_pending_events_handler (gdb_client_data data)
10135 remote_get_pending_stop_replies ();
10139 remote_async (void (*callback) (enum inferior_event_type event_type,
10140 void *context), void *context)
10142 if (remote_async_mask_value == 0)
10143 internal_error (__FILE__, __LINE__,
10144 _("Calling remote_async when async is masked"));
10146 if (callback != NULL)
10148 serial_async (remote_desc, remote_async_serial_handler, NULL);
10149 async_client_callback = callback;
10150 async_client_context = context;
10153 serial_async (remote_desc, NULL, NULL);
10157 remote_async_mask (int new_mask)
10159 int curr_mask = remote_async_mask_value;
10161 remote_async_mask_value = new_mask;
10166 set_remote_cmd (char *args, int from_tty)
10168 help_list (remote_set_cmdlist, "set remote ", -1, gdb_stdout);
10172 show_remote_cmd (char *args, int from_tty)
10174 /* We can't just use cmd_show_list here, because we want to skip
10175 the redundant "show remote Z-packet" and the legacy aliases. */
10176 struct cleanup *showlist_chain;
10177 struct cmd_list_element *list = remote_show_cmdlist;
10179 showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist");
10180 for (; list != NULL; list = list->next)
10181 if (strcmp (list->name, "Z-packet") == 0)
10183 else if (list->type == not_set_cmd)
10184 /* Alias commands are exactly like the original, except they
10185 don't have the normal type. */
10189 struct cleanup *option_chain
10190 = make_cleanup_ui_out_tuple_begin_end (uiout, "option");
10192 ui_out_field_string (uiout, "name", list->name);
10193 ui_out_text (uiout, ": ");
10194 if (list->type == show_cmd)
10195 do_setshow_command ((char *) NULL, from_tty, list);
10197 cmd_func (list, NULL, from_tty);
10198 /* Close the tuple. */
10199 do_cleanups (option_chain);
10202 /* Close the tuple. */
10203 do_cleanups (showlist_chain);
10207 /* Function to be called whenever a new objfile (shlib) is detected. */
10209 remote_new_objfile (struct objfile *objfile)
10211 if (remote_desc != 0) /* Have a remote connection. */
10212 remote_check_symbols (objfile);
10215 /* Pull all the tracepoints defined on the target and create local
10216 data structures representing them. We don't want to create real
10217 tracepoints yet, we don't want to mess up the user's existing
10221 remote_upload_tracepoints (struct uploaded_tp **utpp)
10223 struct remote_state *rs = get_remote_state ();
10226 /* Ask for a first packet of tracepoint definition. */
10228 getpkt (&rs->buf, &rs->buf_size, 0);
10230 while (*p && *p != 'l')
10232 parse_tracepoint_definition (p, utpp);
10233 /* Ask for another packet of tracepoint definition. */
10235 getpkt (&rs->buf, &rs->buf_size, 0);
10242 remote_upload_trace_state_variables (struct uploaded_tsv **utsvp)
10244 struct remote_state *rs = get_remote_state ();
10247 /* Ask for a first packet of variable definition. */
10249 getpkt (&rs->buf, &rs->buf_size, 0);
10251 while (*p && *p != 'l')
10253 parse_tsv_definition (p, utsvp);
10254 /* Ask for another packet of variable definition. */
10256 getpkt (&rs->buf, &rs->buf_size, 0);
10263 _initialize_remote (void)
10265 struct remote_state *rs;
10266 struct cmd_list_element *cmd;
10269 /* architecture specific data */
10270 remote_gdbarch_data_handle =
10271 gdbarch_data_register_post_init (init_remote_state);
10272 remote_g_packet_data_handle =
10273 gdbarch_data_register_pre_init (remote_g_packet_data_init);
10275 /* Initialize the per-target state. At the moment there is only one
10276 of these, not one per target. Only one target is active at a
10277 time. The default buffer size is unimportant; it will be expanded
10278 whenever a larger buffer is needed. */
10279 rs = get_remote_state_raw ();
10280 rs->buf_size = 400;
10281 rs->buf = xmalloc (rs->buf_size);
10283 init_remote_ops ();
10284 add_target (&remote_ops);
10286 init_extended_remote_ops ();
10287 add_target (&extended_remote_ops);
10289 /* Hook into new objfile notification. */
10290 observer_attach_new_objfile (remote_new_objfile);
10292 /* Set up signal handlers. */
10293 sigint_remote_token =
10294 create_async_signal_handler (async_remote_interrupt, NULL);
10295 sigint_remote_twice_token =
10296 create_async_signal_handler (inferior_event_handler_wrapper, NULL);
10299 init_remote_threadtests ();
10302 /* set/show remote ... */
10304 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
10305 Remote protocol specific variables\n\
10306 Configure various remote-protocol specific variables such as\n\
10307 the packets being used"),
10308 &remote_set_cmdlist, "set remote ",
10309 0 /* allow-unknown */, &setlist);
10310 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
10311 Remote protocol specific variables\n\
10312 Configure various remote-protocol specific variables such as\n\
10313 the packets being used"),
10314 &remote_show_cmdlist, "show remote ",
10315 0 /* allow-unknown */, &showlist);
10317 add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
10318 Compare section data on target to the exec file.\n\
10319 Argument is a single section name (default: all loaded sections)."),
10322 add_cmd ("packet", class_maintenance, packet_command, _("\
10323 Send an arbitrary packet to a remote target.\n\
10324 maintenance packet TEXT\n\
10325 If GDB is talking to an inferior via the GDB serial protocol, then\n\
10326 this command sends the string TEXT to the inferior, and displays the\n\
10327 response packet. GDB supplies the initial `$' character, and the\n\
10328 terminating `#' character and checksum."),
10331 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
10332 Set whether to send break if interrupted."), _("\
10333 Show whether to send break if interrupted."), _("\
10334 If set, a break, instead of a cntrl-c, is sent to the remote target."),
10335 set_remotebreak, show_remotebreak,
10336 &setlist, &showlist);
10337 cmd_name = "remotebreak";
10338 cmd = lookup_cmd (&cmd_name, setlist, "", -1, 1);
10339 deprecate_cmd (cmd, "set remote interrupt-sequence");
10340 cmd_name = "remotebreak"; /* needed because lookup_cmd updates the pointer */
10341 cmd = lookup_cmd (&cmd_name, showlist, "", -1, 1);
10342 deprecate_cmd (cmd, "show remote interrupt-sequence");
10344 add_setshow_enum_cmd ("interrupt-sequence", class_support,
10345 interrupt_sequence_modes, &interrupt_sequence_mode, _("\
10346 Set interrupt sequence to remote target."), _("\
10347 Show interrupt sequence to remote target."), _("\
10348 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
10349 NULL, show_interrupt_sequence,
10350 &remote_set_cmdlist,
10351 &remote_show_cmdlist);
10353 add_setshow_boolean_cmd ("interrupt-on-connect", class_support,
10354 &interrupt_on_connect, _("\
10355 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
10356 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
10357 If set, interrupt sequence is sent to remote target."),
10359 &remote_set_cmdlist, &remote_show_cmdlist);
10361 /* Install commands for configuring memory read/write packets. */
10363 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
10364 Set the maximum number of bytes per memory write packet (deprecated)."),
10366 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
10367 Show the maximum number of bytes per memory write packet (deprecated)."),
10369 add_cmd ("memory-write-packet-size", no_class,
10370 set_memory_write_packet_size, _("\
10371 Set the maximum number of bytes per memory-write packet.\n\
10372 Specify the number of bytes in a packet or 0 (zero) for the\n\
10373 default packet size. The actual limit is further reduced\n\
10374 dependent on the target. Specify ``fixed'' to disable the\n\
10375 further restriction and ``limit'' to enable that restriction."),
10376 &remote_set_cmdlist);
10377 add_cmd ("memory-read-packet-size", no_class,
10378 set_memory_read_packet_size, _("\
10379 Set the maximum number of bytes per memory-read packet.\n\
10380 Specify the number of bytes in a packet or 0 (zero) for the\n\
10381 default packet size. The actual limit is further reduced\n\
10382 dependent on the target. Specify ``fixed'' to disable the\n\
10383 further restriction and ``limit'' to enable that restriction."),
10384 &remote_set_cmdlist);
10385 add_cmd ("memory-write-packet-size", no_class,
10386 show_memory_write_packet_size,
10387 _("Show the maximum number of bytes per memory-write packet."),
10388 &remote_show_cmdlist);
10389 add_cmd ("memory-read-packet-size", no_class,
10390 show_memory_read_packet_size,
10391 _("Show the maximum number of bytes per memory-read packet."),
10392 &remote_show_cmdlist);
10394 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class,
10395 &remote_hw_watchpoint_limit, _("\
10396 Set the maximum number of target hardware watchpoints."), _("\
10397 Show the maximum number of target hardware watchpoints."), _("\
10398 Specify a negative limit for unlimited."),
10399 NULL, NULL, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
10400 &remote_set_cmdlist, &remote_show_cmdlist);
10401 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class,
10402 &remote_hw_breakpoint_limit, _("\
10403 Set the maximum number of target hardware breakpoints."), _("\
10404 Show the maximum number of target hardware breakpoints."), _("\
10405 Specify a negative limit for unlimited."),
10406 NULL, NULL, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
10407 &remote_set_cmdlist, &remote_show_cmdlist);
10409 add_setshow_integer_cmd ("remoteaddresssize", class_obscure,
10410 &remote_address_size, _("\
10411 Set the maximum size of the address (in bits) in a memory packet."), _("\
10412 Show the maximum size of the address (in bits) in a memory packet."), NULL,
10414 NULL, /* FIXME: i18n: */
10415 &setlist, &showlist);
10417 add_packet_config_cmd (&remote_protocol_packets[PACKET_X],
10418 "X", "binary-download", 1);
10420 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont],
10421 "vCont", "verbose-resume", 0);
10423 add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals],
10424 "QPassSignals", "pass-signals", 0);
10426 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol],
10427 "qSymbol", "symbol-lookup", 0);
10429 add_packet_config_cmd (&remote_protocol_packets[PACKET_P],
10430 "P", "set-register", 1);
10432 add_packet_config_cmd (&remote_protocol_packets[PACKET_p],
10433 "p", "fetch-register", 1);
10435 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0],
10436 "Z0", "software-breakpoint", 0);
10438 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1],
10439 "Z1", "hardware-breakpoint", 0);
10441 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2],
10442 "Z2", "write-watchpoint", 0);
10444 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3],
10445 "Z3", "read-watchpoint", 0);
10447 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4],
10448 "Z4", "access-watchpoint", 0);
10450 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv],
10451 "qXfer:auxv:read", "read-aux-vector", 0);
10453 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features],
10454 "qXfer:features:read", "target-features", 0);
10456 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries],
10457 "qXfer:libraries:read", "library-info", 0);
10459 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map],
10460 "qXfer:memory-map:read", "memory-map", 0);
10462 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read],
10463 "qXfer:spu:read", "read-spu-object", 0);
10465 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write],
10466 "qXfer:spu:write", "write-spu-object", 0);
10468 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata],
10469 "qXfer:osdata:read", "osdata", 0);
10471 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_threads],
10472 "qXfer:threads:read", "threads", 0);
10474 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read],
10475 "qXfer:siginfo:read", "read-siginfo-object", 0);
10477 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write],
10478 "qXfer:siginfo:write", "write-siginfo-object", 0);
10480 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
10481 "qGetTLSAddr", "get-thread-local-storage-address",
10484 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTIBAddr],
10485 "qGetTIBAddr", "get-thread-information-block-address",
10488 add_packet_config_cmd (&remote_protocol_packets[PACKET_bc],
10489 "bc", "reverse-continue", 0);
10491 add_packet_config_cmd (&remote_protocol_packets[PACKET_bs],
10492 "bs", "reverse-step", 0);
10494 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported],
10495 "qSupported", "supported-packets", 0);
10497 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory],
10498 "qSearch:memory", "search-memory", 0);
10500 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open],
10501 "vFile:open", "hostio-open", 0);
10503 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread],
10504 "vFile:pread", "hostio-pread", 0);
10506 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite],
10507 "vFile:pwrite", "hostio-pwrite", 0);
10509 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close],
10510 "vFile:close", "hostio-close", 0);
10512 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink],
10513 "vFile:unlink", "hostio-unlink", 0);
10515 add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach],
10516 "vAttach", "attach", 0);
10518 add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
10521 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode],
10522 "QStartNoAckMode", "noack", 0);
10524 add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill],
10525 "vKill", "kill", 0);
10527 add_packet_config_cmd (&remote_protocol_packets[PACKET_qAttached],
10528 "qAttached", "query-attached", 0);
10530 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalTracepoints],
10531 "ConditionalTracepoints", "conditional-tracepoints", 0);
10532 add_packet_config_cmd (&remote_protocol_packets[PACKET_FastTracepoints],
10533 "FastTracepoints", "fast-tracepoints", 0);
10535 add_packet_config_cmd (&remote_protocol_packets[PACKET_TracepointSource],
10536 "TracepointSource", "TracepointSource", 0);
10538 /* Keep the old ``set remote Z-packet ...'' working. Each individual
10539 Z sub-packet has its own set and show commands, but users may
10540 have sets to this variable in their .gdbinit files (or in their
10542 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
10543 &remote_Z_packet_detect, _("\
10544 Set use of remote protocol `Z' packets"), _("\
10545 Show use of remote protocol `Z' packets "), _("\
10546 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
10548 set_remote_protocol_Z_packet_cmd,
10549 show_remote_protocol_Z_packet_cmd, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
10550 &remote_set_cmdlist, &remote_show_cmdlist);
10552 add_prefix_cmd ("remote", class_files, remote_command, _("\
10553 Manipulate files on the remote system\n\
10554 Transfer files to and from the remote target system."),
10555 &remote_cmdlist, "remote ",
10556 0 /* allow-unknown */, &cmdlist);
10558 add_cmd ("put", class_files, remote_put_command,
10559 _("Copy a local file to the remote system."),
10562 add_cmd ("get", class_files, remote_get_command,
10563 _("Copy a remote file to the local system."),
10566 add_cmd ("delete", class_files, remote_delete_command,
10567 _("Delete a remote file."),
10570 remote_exec_file = xstrdup ("");
10571 add_setshow_string_noescape_cmd ("exec-file", class_files,
10572 &remote_exec_file, _("\
10573 Set the remote pathname for \"run\""), _("\
10574 Show the remote pathname for \"run\""), NULL, NULL, NULL,
10575 &remote_set_cmdlist, &remote_show_cmdlist);
10577 /* Eventually initialize fileio. See fileio.c */
10578 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
10580 /* Take advantage of the fact that the LWP field is not used, to tag
10581 special ptids with it set to != 0. */
10582 magic_null_ptid = ptid_build (42000, 1, -1);
10583 not_sent_ptid = ptid_build (42000, 1, -2);
10584 any_thread_ptid = ptid_build (42000, 1, 0);
10586 target_buf_size = 2048;
10587 target_buf = xmalloc (target_buf_size);