1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2012 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* See the GDB User Guide for details of the GDB remote protocol. */
23 #include "gdb_string.h"
29 #include "exceptions.h"
31 /*#include "terminal.h" */
34 #include "gdb-stabs.h"
35 #include "gdbthread.h"
39 #include "gdb_assert.h"
42 #include "cli/cli-decode.h"
43 #include "cli/cli-setshow.h"
44 #include "target-descriptions.h"
49 #include "event-loop.h"
50 #include "event-top.h"
56 #include "gdbcore.h" /* for exec_bfd */
58 #include "remote-fileio.h"
59 #include "gdb/fileio.h"
61 #include "xml-support.h"
63 #include "memory-map.h"
65 #include "tracepoint.h"
69 /* Temp hacks for tracepoint encoding migration. */
70 static char *target_buf;
71 static long target_buf_size;
73 encode_actions (struct breakpoint *t, struct bp_location *tloc,
74 char ***tdp_actions, char ***stepping_actions);
76 /* The size to align memory write packets, when practical. The protocol
77 does not guarantee any alignment, and gdb will generate short
78 writes and unaligned writes, but even as a best-effort attempt this
79 can improve bulk transfers. For instance, if a write is misaligned
80 relative to the target's data bus, the stub may need to make an extra
81 round trip fetching data from the target. This doesn't make a
82 huge difference, but it's easy to do, so we try to be helpful.
84 The alignment chosen is arbitrary; usually data bus width is
85 important here, not the possibly larger cache line size. */
86 enum { REMOTE_ALIGN_WRITES = 16 };
88 /* Prototypes for local functions. */
89 static void cleanup_sigint_signal_handler (void *dummy);
90 static void initialize_sigint_signal_handler (void);
91 static int getpkt_sane (char **buf, long *sizeof_buf, int forever);
92 static int getpkt_or_notif_sane (char **buf, long *sizeof_buf,
95 static void handle_remote_sigint (int);
96 static void handle_remote_sigint_twice (int);
97 static void async_remote_interrupt (gdb_client_data);
98 void async_remote_interrupt_twice (gdb_client_data);
100 static void remote_files_info (struct target_ops *ignore);
102 static void remote_prepare_to_store (struct regcache *regcache);
104 static void remote_open (char *name, int from_tty);
106 static void extended_remote_open (char *name, int from_tty);
108 static void remote_open_1 (char *, int, struct target_ops *, int extended_p);
110 static void remote_close (int quitting);
112 static void remote_mourn (struct target_ops *ops);
114 static void extended_remote_restart (void);
116 static void extended_remote_mourn (struct target_ops *);
118 static void remote_mourn_1 (struct target_ops *);
120 static void remote_send (char **buf, long *sizeof_buf_p);
122 static int readchar (int timeout);
124 static void remote_kill (struct target_ops *ops);
126 static int tohex (int nib);
128 static int remote_can_async_p (void);
130 static int remote_is_async_p (void);
132 static void remote_async (void (*callback) (enum inferior_event_type event_type,
133 void *context), void *context);
135 static void remote_detach (struct target_ops *ops, char *args, int from_tty);
137 static void remote_interrupt (int signo);
139 static void remote_interrupt_twice (int signo);
141 static void interrupt_query (void);
143 static void set_general_thread (struct ptid ptid);
144 static void set_continue_thread (struct ptid ptid);
146 static void get_offsets (void);
148 static void skip_frame (void);
150 static long read_frame (char **buf_p, long *sizeof_buf);
152 static int hexnumlen (ULONGEST num);
154 static void init_remote_ops (void);
156 static void init_extended_remote_ops (void);
158 static void remote_stop (ptid_t);
160 static int ishex (int ch, int *val);
162 static int stubhex (int ch);
164 static int hexnumstr (char *, ULONGEST);
166 static int hexnumnstr (char *, ULONGEST, int);
168 static CORE_ADDR remote_address_masked (CORE_ADDR);
170 static void print_packet (char *);
172 static void compare_sections_command (char *, int);
174 static void packet_command (char *, int);
176 static int stub_unpack_int (char *buff, int fieldlength);
178 static ptid_t remote_current_thread (ptid_t oldptid);
180 static void remote_find_new_threads (void);
182 static void record_currthread (ptid_t currthread);
184 static int fromhex (int a);
186 extern int hex2bin (const char *hex, gdb_byte *bin, int count);
188 extern int bin2hex (const gdb_byte *bin, char *hex, int count);
190 static int putpkt_binary (char *buf, int cnt);
192 static void check_binary_download (CORE_ADDR addr);
194 struct packet_config;
196 static void show_packet_config_cmd (struct packet_config *config);
198 static void update_packet_config (struct packet_config *config);
200 static void set_remote_protocol_packet_cmd (char *args, int from_tty,
201 struct cmd_list_element *c);
203 static void show_remote_protocol_packet_cmd (struct ui_file *file,
205 struct cmd_list_element *c,
208 static char *write_ptid (char *buf, const char *endbuf, ptid_t ptid);
209 static ptid_t read_ptid (char *buf, char **obuf);
211 static void remote_set_permissions (void);
214 static int remote_get_trace_status (struct trace_status *ts);
216 static int remote_upload_tracepoints (struct uploaded_tp **utpp);
218 static int remote_upload_trace_state_variables (struct uploaded_tsv **utsvp);
220 static void remote_query_supported (void);
222 static void remote_check_symbols (struct objfile *objfile);
224 void _initialize_remote (void);
227 static struct stop_reply *stop_reply_xmalloc (void);
228 static void stop_reply_xfree (struct stop_reply *);
229 static void do_stop_reply_xfree (void *arg);
230 static void remote_parse_stop_reply (char *buf, struct stop_reply *);
231 static void push_stop_reply (struct stop_reply *);
232 static void remote_get_pending_stop_replies (void);
233 static void discard_pending_stop_replies (int pid);
234 static int peek_stop_reply (ptid_t ptid);
236 static void remote_async_inferior_event_handler (gdb_client_data);
237 static void remote_async_get_pending_events_handler (gdb_client_data);
239 static void remote_terminal_ours (void);
241 static int remote_read_description_p (struct target_ops *target);
243 static void remote_console_output (char *msg);
245 static int remote_supports_cond_breakpoints (void);
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 target-side breakpoint
322 int cond_breakpoints;
324 /* True if the stub reports support for fast tracepoints. */
325 int fast_tracepoints;
327 /* True if the stub reports support for static tracepoints. */
328 int static_tracepoints;
330 /* True if the stub reports support for installing tracepoint while
332 int install_in_trace;
334 /* True if the stub can continue running a trace while GDB is
336 int disconnected_tracing;
338 /* True if the stub reports support for enabling and disabling
339 tracepoints while a trace experiment is running. */
340 int enable_disable_tracepoints;
342 /* True if the stub can collect strings using tracenz bytecode. */
345 /* Nonzero if the user has pressed Ctrl-C, but the target hasn't
346 responded to that. */
350 /* Private data that we'll store in (struct thread_info)->private. */
351 struct private_thread_info
358 free_private_thread_info (struct private_thread_info *info)
364 /* Returns true if the multi-process extensions are in effect. */
366 remote_multi_process_p (struct remote_state *rs)
368 return rs->multi_process_aware;
371 /* This data could be associated with a target, but we do not always
372 have access to the current target when we need it, so for now it is
373 static. This will be fine for as long as only one target is in use
375 static struct remote_state remote_state;
377 static struct remote_state *
378 get_remote_state_raw (void)
380 return &remote_state;
383 /* Description of the remote protocol for a given architecture. */
387 long offset; /* Offset into G packet. */
388 long regnum; /* GDB's internal register number. */
389 LONGEST pnum; /* Remote protocol register number. */
390 int in_g_packet; /* Always part of G packet. */
391 /* long size in bytes; == register_size (target_gdbarch, regnum);
393 /* char *name; == gdbarch_register_name (target_gdbarch, regnum);
397 struct remote_arch_state
399 /* Description of the remote protocol registers. */
400 long sizeof_g_packet;
402 /* Description of the remote protocol registers indexed by REGNUM
403 (making an array gdbarch_num_regs in size). */
404 struct packet_reg *regs;
406 /* This is the size (in chars) of the first response to the ``g''
407 packet. It is used as a heuristic when determining the maximum
408 size of memory-read and memory-write packets. A target will
409 typically only reserve a buffer large enough to hold the ``g''
410 packet. The size does not include packet overhead (headers and
412 long actual_register_packet_size;
414 /* This is the maximum size (in chars) of a non read/write packet.
415 It is also used as a cap on the size of read/write packets. */
416 long remote_packet_size;
419 long sizeof_pkt = 2000;
421 /* Utility: generate error from an incoming stub packet. */
423 trace_error (char *buf)
426 return; /* not an error msg */
429 case '1': /* malformed packet error */
430 if (*++buf == '0') /* general case: */
431 error (_("remote.c: error in outgoing packet."));
433 error (_("remote.c: error in outgoing packet at field #%ld."),
434 strtol (buf, NULL, 16));
436 error (_("trace API error 0x%s."), ++buf);
438 error (_("Target returns error code '%s'."), buf);
442 /* Utility: wait for reply from stub, while accepting "O" packets. */
444 remote_get_noisy_reply (char **buf_p,
447 do /* Loop on reply from remote stub. */
451 QUIT; /* Allow user to bail out with ^C. */
452 getpkt (buf_p, sizeof_buf, 0);
456 else if (strncmp (buf, "qRelocInsn:", strlen ("qRelocInsn:")) == 0)
459 CORE_ADDR from, to, org_to;
461 int adjusted_size = 0;
462 volatile struct gdb_exception ex;
464 p = buf + strlen ("qRelocInsn:");
465 pp = unpack_varlen_hex (p, &ul);
467 error (_("invalid qRelocInsn packet: %s"), buf);
471 unpack_varlen_hex (p, &ul);
476 TRY_CATCH (ex, RETURN_MASK_ALL)
478 gdbarch_relocate_instruction (target_gdbarch, &to, from);
482 adjusted_size = to - org_to;
484 sprintf (buf, "qRelocInsn:%x", adjusted_size);
487 else if (ex.reason < 0 && ex.error == MEMORY_ERROR)
489 /* Propagate memory errors silently back to the target.
490 The stub may have limited the range of addresses we
491 can write to, for example. */
496 /* Something unexpectedly bad happened. Be verbose so
497 we can tell what, and propagate the error back to the
498 stub, so it doesn't get stuck waiting for a
500 exception_fprintf (gdb_stderr, ex,
501 _("warning: relocating instruction: "));
505 else if (buf[0] == 'O' && buf[1] != 'K')
506 remote_console_output (buf + 1); /* 'O' message from stub */
508 return buf; /* Here's the actual reply. */
513 /* Handle for retreving the remote protocol data from gdbarch. */
514 static struct gdbarch_data *remote_gdbarch_data_handle;
516 static struct remote_arch_state *
517 get_remote_arch_state (void)
519 return gdbarch_data (target_gdbarch, remote_gdbarch_data_handle);
522 /* Fetch the global remote target state. */
524 static struct remote_state *
525 get_remote_state (void)
527 /* Make sure that the remote architecture state has been
528 initialized, because doing so might reallocate rs->buf. Any
529 function which calls getpkt also needs to be mindful of changes
530 to rs->buf, but this call limits the number of places which run
532 get_remote_arch_state ();
534 return get_remote_state_raw ();
538 compare_pnums (const void *lhs_, const void *rhs_)
540 const struct packet_reg * const *lhs = lhs_;
541 const struct packet_reg * const *rhs = rhs_;
543 if ((*lhs)->pnum < (*rhs)->pnum)
545 else if ((*lhs)->pnum == (*rhs)->pnum)
552 map_regcache_remote_table (struct gdbarch *gdbarch, struct packet_reg *regs)
554 int regnum, num_remote_regs, offset;
555 struct packet_reg **remote_regs;
557 for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++)
559 struct packet_reg *r = ®s[regnum];
561 if (register_size (gdbarch, regnum) == 0)
562 /* Do not try to fetch zero-sized (placeholder) registers. */
565 r->pnum = gdbarch_remote_register_number (gdbarch, regnum);
570 /* Define the g/G packet format as the contents of each register
571 with a remote protocol number, in order of ascending protocol
574 remote_regs = alloca (gdbarch_num_regs (gdbarch)
575 * sizeof (struct packet_reg *));
576 for (num_remote_regs = 0, regnum = 0;
577 regnum < gdbarch_num_regs (gdbarch);
579 if (regs[regnum].pnum != -1)
580 remote_regs[num_remote_regs++] = ®s[regnum];
582 qsort (remote_regs, num_remote_regs, sizeof (struct packet_reg *),
585 for (regnum = 0, offset = 0; regnum < num_remote_regs; regnum++)
587 remote_regs[regnum]->in_g_packet = 1;
588 remote_regs[regnum]->offset = offset;
589 offset += register_size (gdbarch, remote_regs[regnum]->regnum);
595 /* Given the architecture described by GDBARCH, return the remote
596 protocol register's number and the register's offset in the g/G
597 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
598 If the target does not have a mapping for REGNUM, return false,
599 otherwise, return true. */
602 remote_register_number_and_offset (struct gdbarch *gdbarch, int regnum,
603 int *pnum, int *poffset)
606 struct packet_reg *regs;
607 struct cleanup *old_chain;
609 gdb_assert (regnum < gdbarch_num_regs (gdbarch));
611 regs = xcalloc (gdbarch_num_regs (gdbarch), sizeof (struct packet_reg));
612 old_chain = make_cleanup (xfree, regs);
614 sizeof_g_packet = map_regcache_remote_table (gdbarch, regs);
616 *pnum = regs[regnum].pnum;
617 *poffset = regs[regnum].offset;
619 do_cleanups (old_chain);
625 init_remote_state (struct gdbarch *gdbarch)
627 struct remote_state *rs = get_remote_state_raw ();
628 struct remote_arch_state *rsa;
630 rsa = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_arch_state);
632 /* Use the architecture to build a regnum<->pnum table, which will be
633 1:1 unless a feature set specifies otherwise. */
634 rsa->regs = GDBARCH_OBSTACK_CALLOC (gdbarch,
635 gdbarch_num_regs (gdbarch),
638 /* Record the maximum possible size of the g packet - it may turn out
640 rsa->sizeof_g_packet = map_regcache_remote_table (gdbarch, rsa->regs);
642 /* Default maximum number of characters in a packet body. Many
643 remote stubs have a hardwired buffer size of 400 bytes
644 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
645 as the maximum packet-size to ensure that the packet and an extra
646 NUL character can always fit in the buffer. This stops GDB
647 trashing stubs that try to squeeze an extra NUL into what is
648 already a full buffer (As of 1999-12-04 that was most stubs). */
649 rsa->remote_packet_size = 400 - 1;
651 /* This one is filled in when a ``g'' packet is received. */
652 rsa->actual_register_packet_size = 0;
654 /* Should rsa->sizeof_g_packet needs more space than the
655 default, adjust the size accordingly. Remember that each byte is
656 encoded as two characters. 32 is the overhead for the packet
657 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
658 (``$NN:G...#NN'') is a better guess, the below has been padded a
660 if (rsa->sizeof_g_packet > ((rsa->remote_packet_size - 32) / 2))
661 rsa->remote_packet_size = (rsa->sizeof_g_packet * 2 + 32);
663 /* Make sure that the packet buffer is plenty big enough for
664 this architecture. */
665 if (rs->buf_size < rsa->remote_packet_size)
667 rs->buf_size = 2 * rsa->remote_packet_size;
668 rs->buf = xrealloc (rs->buf, rs->buf_size);
674 /* Return the current allowed size of a remote packet. This is
675 inferred from the current architecture, and should be used to
676 limit the length of outgoing packets. */
678 get_remote_packet_size (void)
680 struct remote_state *rs = get_remote_state ();
681 struct remote_arch_state *rsa = get_remote_arch_state ();
683 if (rs->explicit_packet_size)
684 return rs->explicit_packet_size;
686 return rsa->remote_packet_size;
689 static struct packet_reg *
690 packet_reg_from_regnum (struct remote_arch_state *rsa, long regnum)
692 if (regnum < 0 && regnum >= gdbarch_num_regs (target_gdbarch))
696 struct packet_reg *r = &rsa->regs[regnum];
698 gdb_assert (r->regnum == regnum);
703 static struct packet_reg *
704 packet_reg_from_pnum (struct remote_arch_state *rsa, LONGEST pnum)
708 for (i = 0; i < gdbarch_num_regs (target_gdbarch); i++)
710 struct packet_reg *r = &rsa->regs[i];
718 /* FIXME: graces/2002-08-08: These variables should eventually be
719 bound to an instance of the target object (as in gdbarch-tdep()),
720 when such a thing exists. */
722 /* This is set to the data address of the access causing the target
723 to stop for a watchpoint. */
724 static CORE_ADDR remote_watch_data_address;
726 /* This is non-zero if target stopped for a watchpoint. */
727 static int remote_stopped_by_watchpoint_p;
729 static struct target_ops remote_ops;
731 static struct target_ops extended_remote_ops;
733 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
734 ``forever'' still use the normal timeout mechanism. This is
735 currently used by the ASYNC code to guarentee that target reads
736 during the initial connect always time-out. Once getpkt has been
737 modified to return a timeout indication and, in turn
738 remote_wait()/wait_for_inferior() have gained a timeout parameter
740 static int wait_forever_enabled_p = 1;
742 /* Allow the user to specify what sequence to send to the remote
743 when he requests a program interruption: Although ^C is usually
744 what remote systems expect (this is the default, here), it is
745 sometimes preferable to send a break. On other systems such
746 as the Linux kernel, a break followed by g, which is Magic SysRq g
747 is required in order to interrupt the execution. */
748 const char interrupt_sequence_control_c[] = "Ctrl-C";
749 const char interrupt_sequence_break[] = "BREAK";
750 const char interrupt_sequence_break_g[] = "BREAK-g";
751 static const char *const interrupt_sequence_modes[] =
753 interrupt_sequence_control_c,
754 interrupt_sequence_break,
755 interrupt_sequence_break_g,
758 static const char *interrupt_sequence_mode = interrupt_sequence_control_c;
761 show_interrupt_sequence (struct ui_file *file, int from_tty,
762 struct cmd_list_element *c,
765 if (interrupt_sequence_mode == interrupt_sequence_control_c)
766 fprintf_filtered (file,
767 _("Send the ASCII ETX character (Ctrl-c) "
768 "to the remote target to interrupt the "
769 "execution of the program.\n"));
770 else if (interrupt_sequence_mode == interrupt_sequence_break)
771 fprintf_filtered (file,
772 _("send a break signal to the remote target "
773 "to interrupt the execution of the program.\n"));
774 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
775 fprintf_filtered (file,
776 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
777 "the remote target to interrupt the execution "
778 "of Linux kernel.\n"));
780 internal_error (__FILE__, __LINE__,
781 _("Invalid value for interrupt_sequence_mode: %s."),
782 interrupt_sequence_mode);
785 /* This boolean variable specifies whether interrupt_sequence is sent
786 to the remote target when gdb connects to it.
787 This is mostly needed when you debug the Linux kernel: The Linux kernel
788 expects BREAK g which is Magic SysRq g for connecting gdb. */
789 static int interrupt_on_connect = 0;
791 /* This variable is used to implement the "set/show remotebreak" commands.
792 Since these commands are now deprecated in favor of "set/show remote
793 interrupt-sequence", it no longer has any effect on the code. */
794 static int remote_break;
797 set_remotebreak (char *args, int from_tty, struct cmd_list_element *c)
800 interrupt_sequence_mode = interrupt_sequence_break;
802 interrupt_sequence_mode = interrupt_sequence_control_c;
806 show_remotebreak (struct ui_file *file, int from_tty,
807 struct cmd_list_element *c,
812 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
813 remote_open knows that we don't have a file open when the program
815 static struct serial *remote_desc = NULL;
817 /* This variable sets the number of bits in an address that are to be
818 sent in a memory ("M" or "m") packet. Normally, after stripping
819 leading zeros, the entire address would be sent. This variable
820 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
821 initial implementation of remote.c restricted the address sent in
822 memory packets to ``host::sizeof long'' bytes - (typically 32
823 bits). Consequently, for 64 bit targets, the upper 32 bits of an
824 address was never sent. Since fixing this bug may cause a break in
825 some remote targets this variable is principly provided to
826 facilitate backward compatibility. */
828 static int remote_address_size;
830 /* Temporary to track who currently owns the terminal. See
831 remote_terminal_* for more details. */
833 static int remote_async_terminal_ours_p;
835 /* The executable file to use for "run" on the remote side. */
837 static char *remote_exec_file = "";
840 /* User configurable variables for the number of characters in a
841 memory read/write packet. MIN (rsa->remote_packet_size,
842 rsa->sizeof_g_packet) is the default. Some targets need smaller
843 values (fifo overruns, et.al.) and some users need larger values
844 (speed up transfers). The variables ``preferred_*'' (the user
845 request), ``current_*'' (what was actually set) and ``forced_*''
846 (Positive - a soft limit, negative - a hard limit). */
848 struct memory_packet_config
855 /* Compute the current size of a read/write packet. Since this makes
856 use of ``actual_register_packet_size'' the computation is dynamic. */
859 get_memory_packet_size (struct memory_packet_config *config)
861 struct remote_state *rs = get_remote_state ();
862 struct remote_arch_state *rsa = get_remote_arch_state ();
864 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
865 law?) that some hosts don't cope very well with large alloca()
866 calls. Eventually the alloca() code will be replaced by calls to
867 xmalloc() and make_cleanups() allowing this restriction to either
868 be lifted or removed. */
869 #ifndef MAX_REMOTE_PACKET_SIZE
870 #define MAX_REMOTE_PACKET_SIZE 16384
872 /* NOTE: 20 ensures we can write at least one byte. */
873 #ifndef MIN_REMOTE_PACKET_SIZE
874 #define MIN_REMOTE_PACKET_SIZE 20
879 if (config->size <= 0)
880 what_they_get = MAX_REMOTE_PACKET_SIZE;
882 what_they_get = config->size;
886 what_they_get = get_remote_packet_size ();
887 /* Limit the packet to the size specified by the user. */
889 && what_they_get > config->size)
890 what_they_get = config->size;
892 /* Limit it to the size of the targets ``g'' response unless we have
893 permission from the stub to use a larger packet size. */
894 if (rs->explicit_packet_size == 0
895 && rsa->actual_register_packet_size > 0
896 && what_they_get > rsa->actual_register_packet_size)
897 what_they_get = rsa->actual_register_packet_size;
899 if (what_they_get > MAX_REMOTE_PACKET_SIZE)
900 what_they_get = MAX_REMOTE_PACKET_SIZE;
901 if (what_they_get < MIN_REMOTE_PACKET_SIZE)
902 what_they_get = MIN_REMOTE_PACKET_SIZE;
904 /* Make sure there is room in the global buffer for this packet
905 (including its trailing NUL byte). */
906 if (rs->buf_size < what_they_get + 1)
908 rs->buf_size = 2 * what_they_get;
909 rs->buf = xrealloc (rs->buf, 2 * what_they_get);
912 return what_they_get;
915 /* Update the size of a read/write packet. If they user wants
916 something really big then do a sanity check. */
919 set_memory_packet_size (char *args, struct memory_packet_config *config)
921 int fixed_p = config->fixed_p;
922 long size = config->size;
925 error (_("Argument required (integer, `fixed' or `limited')."));
926 else if (strcmp (args, "hard") == 0
927 || strcmp (args, "fixed") == 0)
929 else if (strcmp (args, "soft") == 0
930 || strcmp (args, "limit") == 0)
936 size = strtoul (args, &end, 0);
938 error (_("Invalid %s (bad syntax)."), config->name);
940 /* Instead of explicitly capping the size of a packet to
941 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
942 instead allowed to set the size to something arbitrarily
944 if (size > MAX_REMOTE_PACKET_SIZE)
945 error (_("Invalid %s (too large)."), config->name);
949 if (fixed_p && !config->fixed_p)
951 if (! query (_("The target may not be able to correctly handle a %s\n"
952 "of %ld bytes. Change the packet size? "),
954 error (_("Packet size not changed."));
956 /* Update the config. */
957 config->fixed_p = fixed_p;
962 show_memory_packet_size (struct memory_packet_config *config)
964 printf_filtered (_("The %s is %ld. "), config->name, config->size);
966 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
967 get_memory_packet_size (config));
969 printf_filtered (_("Packets are limited to %ld bytes.\n"),
970 get_memory_packet_size (config));
973 static struct memory_packet_config memory_write_packet_config =
975 "memory-write-packet-size",
979 set_memory_write_packet_size (char *args, int from_tty)
981 set_memory_packet_size (args, &memory_write_packet_config);
985 show_memory_write_packet_size (char *args, int from_tty)
987 show_memory_packet_size (&memory_write_packet_config);
991 get_memory_write_packet_size (void)
993 return get_memory_packet_size (&memory_write_packet_config);
996 static struct memory_packet_config memory_read_packet_config =
998 "memory-read-packet-size",
1002 set_memory_read_packet_size (char *args, int from_tty)
1004 set_memory_packet_size (args, &memory_read_packet_config);
1008 show_memory_read_packet_size (char *args, int from_tty)
1010 show_memory_packet_size (&memory_read_packet_config);
1014 get_memory_read_packet_size (void)
1016 long size = get_memory_packet_size (&memory_read_packet_config);
1018 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1019 extra buffer size argument before the memory read size can be
1020 increased beyond this. */
1021 if (size > get_remote_packet_size ())
1022 size = get_remote_packet_size ();
1027 /* Generic configuration support for packets the stub optionally
1028 supports. Allows the user to specify the use of the packet as well
1029 as allowing GDB to auto-detect support in the remote stub. */
1033 PACKET_SUPPORT_UNKNOWN = 0,
1038 struct packet_config
1042 enum auto_boolean detect;
1043 enum packet_support support;
1046 /* Analyze a packet's return value and update the packet config
1057 update_packet_config (struct packet_config *config)
1059 switch (config->detect)
1061 case AUTO_BOOLEAN_TRUE:
1062 config->support = PACKET_ENABLE;
1064 case AUTO_BOOLEAN_FALSE:
1065 config->support = PACKET_DISABLE;
1067 case AUTO_BOOLEAN_AUTO:
1068 config->support = PACKET_SUPPORT_UNKNOWN;
1074 show_packet_config_cmd (struct packet_config *config)
1076 char *support = "internal-error";
1078 switch (config->support)
1081 support = "enabled";
1083 case PACKET_DISABLE:
1084 support = "disabled";
1086 case PACKET_SUPPORT_UNKNOWN:
1087 support = "unknown";
1090 switch (config->detect)
1092 case AUTO_BOOLEAN_AUTO:
1093 printf_filtered (_("Support for the `%s' packet "
1094 "is auto-detected, currently %s.\n"),
1095 config->name, support);
1097 case AUTO_BOOLEAN_TRUE:
1098 case AUTO_BOOLEAN_FALSE:
1099 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1100 config->name, support);
1106 add_packet_config_cmd (struct packet_config *config, const char *name,
1107 const char *title, int legacy)
1113 config->name = name;
1114 config->title = title;
1115 config->detect = AUTO_BOOLEAN_AUTO;
1116 config->support = PACKET_SUPPORT_UNKNOWN;
1117 set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1119 show_doc = xstrprintf ("Show current use of remote "
1120 "protocol `%s' (%s) packet",
1122 /* set/show TITLE-packet {auto,on,off} */
1123 cmd_name = xstrprintf ("%s-packet", title);
1124 add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
1125 &config->detect, set_doc,
1126 show_doc, NULL, /* help_doc */
1127 set_remote_protocol_packet_cmd,
1128 show_remote_protocol_packet_cmd,
1129 &remote_set_cmdlist, &remote_show_cmdlist);
1130 /* The command code copies the documentation strings. */
1133 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1138 legacy_name = xstrprintf ("%s-packet", name);
1139 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1140 &remote_set_cmdlist);
1141 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1142 &remote_show_cmdlist);
1146 static enum packet_result
1147 packet_check_result (const char *buf)
1151 /* The stub recognized the packet request. Check that the
1152 operation succeeded. */
1154 && isxdigit (buf[1]) && isxdigit (buf[2])
1156 /* "Enn" - definitly an error. */
1157 return PACKET_ERROR;
1159 /* Always treat "E." as an error. This will be used for
1160 more verbose error messages, such as E.memtypes. */
1161 if (buf[0] == 'E' && buf[1] == '.')
1162 return PACKET_ERROR;
1164 /* The packet may or may not be OK. Just assume it is. */
1168 /* The stub does not support the packet. */
1169 return PACKET_UNKNOWN;
1172 static enum packet_result
1173 packet_ok (const char *buf, struct packet_config *config)
1175 enum packet_result result;
1177 result = packet_check_result (buf);
1182 /* The stub recognized the packet request. */
1183 switch (config->support)
1185 case PACKET_SUPPORT_UNKNOWN:
1187 fprintf_unfiltered (gdb_stdlog,
1188 "Packet %s (%s) is supported\n",
1189 config->name, config->title);
1190 config->support = PACKET_ENABLE;
1192 case PACKET_DISABLE:
1193 internal_error (__FILE__, __LINE__,
1194 _("packet_ok: attempt to use a disabled packet"));
1200 case PACKET_UNKNOWN:
1201 /* The stub does not support the packet. */
1202 switch (config->support)
1205 if (config->detect == AUTO_BOOLEAN_AUTO)
1206 /* If the stub previously indicated that the packet was
1207 supported then there is a protocol error.. */
1208 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1209 config->name, config->title);
1211 /* The user set it wrong. */
1212 error (_("Enabled packet %s (%s) not recognized by stub"),
1213 config->name, config->title);
1215 case PACKET_SUPPORT_UNKNOWN:
1217 fprintf_unfiltered (gdb_stdlog,
1218 "Packet %s (%s) is NOT supported\n",
1219 config->name, config->title);
1220 config->support = PACKET_DISABLE;
1222 case PACKET_DISABLE:
1244 PACKET_vFile_pwrite,
1246 PACKET_vFile_unlink,
1247 PACKET_vFile_readlink,
1249 PACKET_qXfer_features,
1250 PACKET_qXfer_libraries,
1251 PACKET_qXfer_libraries_svr4,
1252 PACKET_qXfer_memory_map,
1253 PACKET_qXfer_spu_read,
1254 PACKET_qXfer_spu_write,
1255 PACKET_qXfer_osdata,
1256 PACKET_qXfer_threads,
1257 PACKET_qXfer_statictrace_read,
1258 PACKET_qXfer_traceframe_info,
1262 PACKET_QPassSignals,
1263 PACKET_qSearch_memory,
1266 PACKET_QStartNoAckMode,
1268 PACKET_qXfer_siginfo_read,
1269 PACKET_qXfer_siginfo_write,
1271 PACKET_ConditionalTracepoints,
1272 PACKET_ConditionalBreakpoints,
1273 PACKET_FastTracepoints,
1274 PACKET_StaticTracepoints,
1275 PACKET_InstallInTrace,
1278 PACKET_TracepointSource,
1281 PACKET_QDisableRandomization,
1285 static struct packet_config remote_protocol_packets[PACKET_MAX];
1288 set_remote_protocol_packet_cmd (char *args, int from_tty,
1289 struct cmd_list_element *c)
1291 struct packet_config *packet;
1293 for (packet = remote_protocol_packets;
1294 packet < &remote_protocol_packets[PACKET_MAX];
1297 if (&packet->detect == c->var)
1299 update_packet_config (packet);
1303 internal_error (__FILE__, __LINE__, _("Could not find config for %s"),
1308 show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty,
1309 struct cmd_list_element *c,
1312 struct packet_config *packet;
1314 for (packet = remote_protocol_packets;
1315 packet < &remote_protocol_packets[PACKET_MAX];
1318 if (&packet->detect == c->var)
1320 show_packet_config_cmd (packet);
1324 internal_error (__FILE__, __LINE__, _("Could not find config for %s"),
1328 /* Should we try one of the 'Z' requests? */
1332 Z_PACKET_SOFTWARE_BP,
1333 Z_PACKET_HARDWARE_BP,
1340 /* For compatibility with older distributions. Provide a ``set remote
1341 Z-packet ...'' command that updates all the Z packet types. */
1343 static enum auto_boolean remote_Z_packet_detect;
1346 set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
1347 struct cmd_list_element *c)
1351 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1353 remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect;
1354 update_packet_config (&remote_protocol_packets[PACKET_Z0 + i]);
1359 show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty,
1360 struct cmd_list_element *c,
1365 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1367 show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]);
1371 /* Should we try the 'ThreadInfo' query packet?
1373 This variable (NOT available to the user: auto-detect only!)
1374 determines whether GDB will use the new, simpler "ThreadInfo"
1375 query or the older, more complex syntax for thread queries.
1376 This is an auto-detect variable (set to true at each connect,
1377 and set to false when the target fails to recognize it). */
1379 static int use_threadinfo_query;
1380 static int use_threadextra_query;
1382 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1383 static struct async_signal_handler *sigint_remote_twice_token;
1384 static struct async_signal_handler *sigint_remote_token;
1387 /* Asynchronous signal handle registered as event loop source for
1388 when we have pending events ready to be passed to the core. */
1390 static struct async_event_handler *remote_async_inferior_event_token;
1392 /* Asynchronous signal handle registered as event loop source for when
1393 the remote sent us a %Stop notification. The registered callback
1394 will do a vStopped sequence to pull the rest of the events out of
1395 the remote side into our event queue. */
1397 static struct async_event_handler *remote_async_get_pending_events_token;
1400 static ptid_t magic_null_ptid;
1401 static ptid_t not_sent_ptid;
1402 static ptid_t any_thread_ptid;
1404 /* These are the threads which we last sent to the remote system. The
1405 TID member will be -1 for all or -2 for not sent yet. */
1407 static ptid_t general_thread;
1408 static ptid_t continue_thread;
1410 /* This the traceframe which we last selected on the remote system.
1411 It will be -1 if no traceframe is selected. */
1412 static int remote_traceframe_number = -1;
1414 /* Find out if the stub attached to PID (and hence GDB should offer to
1415 detach instead of killing it when bailing out). */
1418 remote_query_attached (int pid)
1420 struct remote_state *rs = get_remote_state ();
1422 if (remote_protocol_packets[PACKET_qAttached].support == PACKET_DISABLE)
1425 if (remote_multi_process_p (rs))
1426 sprintf (rs->buf, "qAttached:%x", pid);
1428 sprintf (rs->buf, "qAttached");
1431 getpkt (&rs->buf, &rs->buf_size, 0);
1433 switch (packet_ok (rs->buf,
1434 &remote_protocol_packets[PACKET_qAttached]))
1437 if (strcmp (rs->buf, "1") == 0)
1441 warning (_("Remote failure reply: %s"), rs->buf);
1443 case PACKET_UNKNOWN:
1450 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
1451 has been invented by GDB, instead of reported by the target. Since
1452 we can be connected to a remote system before before knowing about
1453 any inferior, mark the target with execution when we find the first
1454 inferior. If ATTACHED is 1, then we had just attached to this
1455 inferior. If it is 0, then we just created this inferior. If it
1456 is -1, then try querying the remote stub to find out if it had
1457 attached to the inferior or not. */
1459 static struct inferior *
1460 remote_add_inferior (int fake_pid_p, int pid, int attached)
1462 struct inferior *inf;
1464 /* Check whether this process we're learning about is to be
1465 considered attached, or if is to be considered to have been
1466 spawned by the stub. */
1468 attached = remote_query_attached (pid);
1470 if (gdbarch_has_global_solist (target_gdbarch))
1472 /* If the target shares code across all inferiors, then every
1473 attach adds a new inferior. */
1474 inf = add_inferior (pid);
1476 /* ... and every inferior is bound to the same program space.
1477 However, each inferior may still have its own address
1479 inf->aspace = maybe_new_address_space ();
1480 inf->pspace = current_program_space;
1484 /* In the traditional debugging scenario, there's a 1-1 match
1485 between program/address spaces. We simply bind the inferior
1486 to the program space's address space. */
1487 inf = current_inferior ();
1488 inferior_appeared (inf, pid);
1491 inf->attach_flag = attached;
1492 inf->fake_pid_p = fake_pid_p;
1497 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1498 according to RUNNING. */
1501 remote_add_thread (ptid_t ptid, int running)
1505 set_executing (ptid, running);
1506 set_running (ptid, running);
1509 /* Come here when we learn about a thread id from the remote target.
1510 It may be the first time we hear about such thread, so take the
1511 opportunity to add it to GDB's thread list. In case this is the
1512 first time we're noticing its corresponding inferior, add it to
1513 GDB's inferior list as well. */
1516 remote_notice_new_inferior (ptid_t currthread, int running)
1518 /* If this is a new thread, add it to GDB's thread list.
1519 If we leave it up to WFI to do this, bad things will happen. */
1521 if (in_thread_list (currthread) && is_exited (currthread))
1523 /* We're seeing an event on a thread id we knew had exited.
1524 This has to be a new thread reusing the old id. Add it. */
1525 remote_add_thread (currthread, running);
1529 if (!in_thread_list (currthread))
1531 struct inferior *inf = NULL;
1532 int pid = ptid_get_pid (currthread);
1534 if (ptid_is_pid (inferior_ptid)
1535 && pid == ptid_get_pid (inferior_ptid))
1537 /* inferior_ptid has no thread member yet. This can happen
1538 with the vAttach -> remote_wait,"TAAthread:" path if the
1539 stub doesn't support qC. This is the first stop reported
1540 after an attach, so this is the main thread. Update the
1541 ptid in the thread list. */
1542 if (in_thread_list (pid_to_ptid (pid)))
1543 thread_change_ptid (inferior_ptid, currthread);
1546 remote_add_thread (currthread, running);
1547 inferior_ptid = currthread;
1552 if (ptid_equal (magic_null_ptid, inferior_ptid))
1554 /* inferior_ptid is not set yet. This can happen with the
1555 vRun -> remote_wait,"TAAthread:" path if the stub
1556 doesn't support qC. This is the first stop reported
1557 after an attach, so this is the main thread. Update the
1558 ptid in the thread list. */
1559 thread_change_ptid (inferior_ptid, currthread);
1563 /* When connecting to a target remote, or to a target
1564 extended-remote which already was debugging an inferior, we
1565 may not know about it yet. Add it before adding its child
1566 thread, so notifications are emitted in a sensible order. */
1567 if (!in_inferior_list (ptid_get_pid (currthread)))
1569 struct remote_state *rs = get_remote_state ();
1570 int fake_pid_p = !remote_multi_process_p (rs);
1572 inf = remote_add_inferior (fake_pid_p,
1573 ptid_get_pid (currthread), -1);
1576 /* This is really a new thread. Add it. */
1577 remote_add_thread (currthread, running);
1579 /* If we found a new inferior, let the common code do whatever
1580 it needs to with it (e.g., read shared libraries, insert
1583 notice_new_inferior (currthread, running, 0);
1587 /* Return the private thread data, creating it if necessary. */
1589 struct private_thread_info *
1590 demand_private_info (ptid_t ptid)
1592 struct thread_info *info = find_thread_ptid (ptid);
1598 info->private = xmalloc (sizeof (*(info->private)));
1599 info->private_dtor = free_private_thread_info;
1600 info->private->core = -1;
1601 info->private->extra = 0;
1604 return info->private;
1607 /* Call this function as a result of
1608 1) A halt indication (T packet) containing a thread id
1609 2) A direct query of currthread
1610 3) Successful execution of set thread */
1613 record_currthread (ptid_t currthread)
1615 general_thread = currthread;
1618 static char *last_pass_packet;
1620 /* If 'QPassSignals' is supported, tell the remote stub what signals
1621 it can simply pass through to the inferior without reporting. */
1624 remote_pass_signals (int numsigs, unsigned char *pass_signals)
1626 if (remote_protocol_packets[PACKET_QPassSignals].support != PACKET_DISABLE)
1628 char *pass_packet, *p;
1631 gdb_assert (numsigs < 256);
1632 for (i = 0; i < numsigs; i++)
1634 if (pass_signals[i])
1637 pass_packet = xmalloc (count * 3 + strlen ("QPassSignals:") + 1);
1638 strcpy (pass_packet, "QPassSignals:");
1639 p = pass_packet + strlen (pass_packet);
1640 for (i = 0; i < numsigs; i++)
1642 if (pass_signals[i])
1645 *p++ = tohex (i >> 4);
1646 *p++ = tohex (i & 15);
1655 if (!last_pass_packet || strcmp (last_pass_packet, pass_packet))
1657 struct remote_state *rs = get_remote_state ();
1658 char *buf = rs->buf;
1660 putpkt (pass_packet);
1661 getpkt (&rs->buf, &rs->buf_size, 0);
1662 packet_ok (buf, &remote_protocol_packets[PACKET_QPassSignals]);
1663 if (last_pass_packet)
1664 xfree (last_pass_packet);
1665 last_pass_packet = pass_packet;
1668 xfree (pass_packet);
1672 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
1673 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
1674 thread. If GEN is set, set the general thread, if not, then set
1675 the step/continue thread. */
1677 set_thread (struct ptid ptid, int gen)
1679 struct remote_state *rs = get_remote_state ();
1680 ptid_t state = gen ? general_thread : continue_thread;
1681 char *buf = rs->buf;
1682 char *endbuf = rs->buf + get_remote_packet_size ();
1684 if (ptid_equal (state, ptid))
1688 *buf++ = gen ? 'g' : 'c';
1689 if (ptid_equal (ptid, magic_null_ptid))
1690 xsnprintf (buf, endbuf - buf, "0");
1691 else if (ptid_equal (ptid, any_thread_ptid))
1692 xsnprintf (buf, endbuf - buf, "0");
1693 else if (ptid_equal (ptid, minus_one_ptid))
1694 xsnprintf (buf, endbuf - buf, "-1");
1696 write_ptid (buf, endbuf, ptid);
1698 getpkt (&rs->buf, &rs->buf_size, 0);
1700 general_thread = ptid;
1702 continue_thread = ptid;
1706 set_general_thread (struct ptid ptid)
1708 set_thread (ptid, 1);
1712 set_continue_thread (struct ptid ptid)
1714 set_thread (ptid, 0);
1717 /* Change the remote current process. Which thread within the process
1718 ends up selected isn't important, as long as it is the same process
1719 as what INFERIOR_PTID points to.
1721 This comes from that fact that there is no explicit notion of
1722 "selected process" in the protocol. The selected process for
1723 general operations is the process the selected general thread
1727 set_general_process (void)
1729 struct remote_state *rs = get_remote_state ();
1731 /* If the remote can't handle multiple processes, don't bother. */
1732 if (!rs->extended || !remote_multi_process_p (rs))
1735 /* We only need to change the remote current thread if it's pointing
1736 at some other process. */
1737 if (ptid_get_pid (general_thread) != ptid_get_pid (inferior_ptid))
1738 set_general_thread (inferior_ptid);
1742 /* Return nonzero if the thread PTID is still alive on the remote
1746 remote_thread_alive (struct target_ops *ops, ptid_t ptid)
1748 struct remote_state *rs = get_remote_state ();
1751 if (ptid_equal (ptid, magic_null_ptid))
1752 /* The main thread is always alive. */
1755 if (ptid_get_pid (ptid) != 0 && ptid_get_tid (ptid) == 0)
1756 /* The main thread is always alive. This can happen after a
1757 vAttach, if the remote side doesn't support
1762 endp = rs->buf + get_remote_packet_size ();
1765 write_ptid (p, endp, ptid);
1768 getpkt (&rs->buf, &rs->buf_size, 0);
1769 return (rs->buf[0] == 'O' && rs->buf[1] == 'K');
1772 /* About these extended threadlist and threadinfo packets. They are
1773 variable length packets but, the fields within them are often fixed
1774 length. They are redundent enough to send over UDP as is the
1775 remote protocol in general. There is a matching unit test module
1778 #define OPAQUETHREADBYTES 8
1780 /* a 64 bit opaque identifier */
1781 typedef unsigned char threadref[OPAQUETHREADBYTES];
1783 /* WARNING: This threadref data structure comes from the remote O.S.,
1784 libstub protocol encoding, and remote.c. It is not particularly
1787 /* Right now, the internal structure is int. We want it to be bigger.
1788 Plan to fix this. */
1790 typedef int gdb_threadref; /* Internal GDB thread reference. */
1792 /* gdb_ext_thread_info is an internal GDB data structure which is
1793 equivalent to the reply of the remote threadinfo packet. */
1795 struct gdb_ext_thread_info
1797 threadref threadid; /* External form of thread reference. */
1798 int active; /* Has state interesting to GDB?
1800 char display[256]; /* Brief state display, name,
1801 blocked/suspended. */
1802 char shortname[32]; /* To be used to name threads. */
1803 char more_display[256]; /* Long info, statistics, queue depth,
1807 /* The volume of remote transfers can be limited by submitting
1808 a mask containing bits specifying the desired information.
1809 Use a union of these values as the 'selection' parameter to
1810 get_thread_info. FIXME: Make these TAG names more thread specific. */
1812 #define TAG_THREADID 1
1813 #define TAG_EXISTS 2
1814 #define TAG_DISPLAY 4
1815 #define TAG_THREADNAME 8
1816 #define TAG_MOREDISPLAY 16
1818 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1820 char *unpack_varlen_hex (char *buff, ULONGEST *result);
1822 static char *unpack_nibble (char *buf, int *val);
1824 static char *pack_nibble (char *buf, int nibble);
1826 static char *pack_hex_byte (char *pkt, int /* unsigned char */ byte);
1828 static char *unpack_byte (char *buf, int *value);
1830 static char *pack_int (char *buf, int value);
1832 static char *unpack_int (char *buf, int *value);
1834 static char *unpack_string (char *src, char *dest, int length);
1836 static char *pack_threadid (char *pkt, threadref *id);
1838 static char *unpack_threadid (char *inbuf, threadref *id);
1840 void int_to_threadref (threadref *id, int value);
1842 static int threadref_to_int (threadref *ref);
1844 static void copy_threadref (threadref *dest, threadref *src);
1846 static int threadmatch (threadref *dest, threadref *src);
1848 static char *pack_threadinfo_request (char *pkt, int mode,
1851 static int remote_unpack_thread_info_response (char *pkt,
1852 threadref *expectedref,
1853 struct gdb_ext_thread_info
1857 static int remote_get_threadinfo (threadref *threadid,
1858 int fieldset, /*TAG mask */
1859 struct gdb_ext_thread_info *info);
1861 static char *pack_threadlist_request (char *pkt, int startflag,
1863 threadref *nextthread);
1865 static int parse_threadlist_response (char *pkt,
1867 threadref *original_echo,
1868 threadref *resultlist,
1871 static int remote_get_threadlist (int startflag,
1872 threadref *nextthread,
1876 threadref *threadlist);
1878 typedef int (*rmt_thread_action) (threadref *ref, void *context);
1880 static int remote_threadlist_iterator (rmt_thread_action stepfunction,
1881 void *context, int looplimit);
1883 static int remote_newthread_step (threadref *ref, void *context);
1886 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
1887 buffer we're allowed to write to. Returns
1888 BUF+CHARACTERS_WRITTEN. */
1891 write_ptid (char *buf, const char *endbuf, ptid_t ptid)
1894 struct remote_state *rs = get_remote_state ();
1896 if (remote_multi_process_p (rs))
1898 pid = ptid_get_pid (ptid);
1900 buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid);
1902 buf += xsnprintf (buf, endbuf - buf, "p%x.", pid);
1904 tid = ptid_get_tid (ptid);
1906 buf += xsnprintf (buf, endbuf - buf, "-%x", -tid);
1908 buf += xsnprintf (buf, endbuf - buf, "%x", tid);
1913 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
1914 passed the last parsed char. Returns null_ptid on error. */
1917 read_ptid (char *buf, char **obuf)
1921 ULONGEST pid = 0, tid = 0;
1925 /* Multi-process ptid. */
1926 pp = unpack_varlen_hex (p + 1, &pid);
1928 error (_("invalid remote ptid: %s"), p);
1931 pp = unpack_varlen_hex (p + 1, &tid);
1934 return ptid_build (pid, 0, tid);
1937 /* No multi-process. Just a tid. */
1938 pp = unpack_varlen_hex (p, &tid);
1940 /* Since the stub is not sending a process id, then default to
1941 what's in inferior_ptid, unless it's null at this point. If so,
1942 then since there's no way to know the pid of the reported
1943 threads, use the magic number. */
1944 if (ptid_equal (inferior_ptid, null_ptid))
1945 pid = ptid_get_pid (magic_null_ptid);
1947 pid = ptid_get_pid (inferior_ptid);
1951 return ptid_build (pid, 0, tid);
1954 /* Encode 64 bits in 16 chars of hex. */
1956 static const char hexchars[] = "0123456789abcdef";
1959 ishex (int ch, int *val)
1961 if ((ch >= 'a') && (ch <= 'f'))
1963 *val = ch - 'a' + 10;
1966 if ((ch >= 'A') && (ch <= 'F'))
1968 *val = ch - 'A' + 10;
1971 if ((ch >= '0') && (ch <= '9'))
1982 if (ch >= 'a' && ch <= 'f')
1983 return ch - 'a' + 10;
1984 if (ch >= '0' && ch <= '9')
1986 if (ch >= 'A' && ch <= 'F')
1987 return ch - 'A' + 10;
1992 stub_unpack_int (char *buff, int fieldlength)
1999 nibble = stubhex (*buff++);
2003 retval = retval << 4;
2009 unpack_varlen_hex (char *buff, /* packet to parse */
2013 ULONGEST retval = 0;
2015 while (ishex (*buff, &nibble))
2018 retval = retval << 4;
2019 retval |= nibble & 0x0f;
2026 unpack_nibble (char *buf, int *val)
2028 *val = fromhex (*buf++);
2033 pack_nibble (char *buf, int nibble)
2035 *buf++ = hexchars[(nibble & 0x0f)];
2040 pack_hex_byte (char *pkt, int byte)
2042 *pkt++ = hexchars[(byte >> 4) & 0xf];
2043 *pkt++ = hexchars[(byte & 0xf)];
2048 unpack_byte (char *buf, int *value)
2050 *value = stub_unpack_int (buf, 2);
2055 pack_int (char *buf, int value)
2057 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
2058 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
2059 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
2060 buf = pack_hex_byte (buf, (value & 0xff));
2065 unpack_int (char *buf, int *value)
2067 *value = stub_unpack_int (buf, 8);
2071 #if 0 /* Currently unused, uncomment when needed. */
2072 static char *pack_string (char *pkt, char *string);
2075 pack_string (char *pkt, char *string)
2080 len = strlen (string);
2082 len = 200; /* Bigger than most GDB packets, junk??? */
2083 pkt = pack_hex_byte (pkt, len);
2087 if ((ch == '\0') || (ch == '#'))
2088 ch = '*'; /* Protect encapsulation. */
2093 #endif /* 0 (unused) */
2096 unpack_string (char *src, char *dest, int length)
2105 pack_threadid (char *pkt, threadref *id)
2108 unsigned char *altid;
2110 altid = (unsigned char *) id;
2111 limit = pkt + BUF_THREAD_ID_SIZE;
2113 pkt = pack_hex_byte (pkt, *altid++);
2119 unpack_threadid (char *inbuf, threadref *id)
2122 char *limit = inbuf + BUF_THREAD_ID_SIZE;
2125 altref = (char *) id;
2127 while (inbuf < limit)
2129 x = stubhex (*inbuf++);
2130 y = stubhex (*inbuf++);
2131 *altref++ = (x << 4) | y;
2136 /* Externally, threadrefs are 64 bits but internally, they are still
2137 ints. This is due to a mismatch of specifications. We would like
2138 to use 64bit thread references internally. This is an adapter
2142 int_to_threadref (threadref *id, int value)
2144 unsigned char *scan;
2146 scan = (unsigned char *) id;
2152 *scan++ = (value >> 24) & 0xff;
2153 *scan++ = (value >> 16) & 0xff;
2154 *scan++ = (value >> 8) & 0xff;
2155 *scan++ = (value & 0xff);
2159 threadref_to_int (threadref *ref)
2162 unsigned char *scan;
2168 value = (value << 8) | ((*scan++) & 0xff);
2173 copy_threadref (threadref *dest, threadref *src)
2176 unsigned char *csrc, *cdest;
2178 csrc = (unsigned char *) src;
2179 cdest = (unsigned char *) dest;
2186 threadmatch (threadref *dest, threadref *src)
2188 /* Things are broken right now, so just assume we got a match. */
2190 unsigned char *srcp, *destp;
2192 srcp = (char *) src;
2193 destp = (char *) dest;
2197 result &= (*srcp++ == *destp++) ? 1 : 0;
2204 threadid:1, # always request threadid
2211 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2214 pack_threadinfo_request (char *pkt, int mode, threadref *id)
2216 *pkt++ = 'q'; /* Info Query */
2217 *pkt++ = 'P'; /* process or thread info */
2218 pkt = pack_int (pkt, mode); /* mode */
2219 pkt = pack_threadid (pkt, id); /* threadid */
2220 *pkt = '\0'; /* terminate */
2224 /* These values tag the fields in a thread info response packet. */
2225 /* Tagging the fields allows us to request specific fields and to
2226 add more fields as time goes by. */
2228 #define TAG_THREADID 1 /* Echo the thread identifier. */
2229 #define TAG_EXISTS 2 /* Is this process defined enough to
2230 fetch registers and its stack? */
2231 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2232 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2233 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2237 remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
2238 struct gdb_ext_thread_info *info)
2240 struct remote_state *rs = get_remote_state ();
2244 char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */
2247 /* info->threadid = 0; FIXME: implement zero_threadref. */
2249 info->display[0] = '\0';
2250 info->shortname[0] = '\0';
2251 info->more_display[0] = '\0';
2253 /* Assume the characters indicating the packet type have been
2255 pkt = unpack_int (pkt, &mask); /* arg mask */
2256 pkt = unpack_threadid (pkt, &ref);
2259 warning (_("Incomplete response to threadinfo request."));
2260 if (!threadmatch (&ref, expectedref))
2261 { /* This is an answer to a different request. */
2262 warning (_("ERROR RMT Thread info mismatch."));
2265 copy_threadref (&info->threadid, &ref);
2267 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2269 /* Packets are terminated with nulls. */
2270 while ((pkt < limit) && mask && *pkt)
2272 pkt = unpack_int (pkt, &tag); /* tag */
2273 pkt = unpack_byte (pkt, &length); /* length */
2274 if (!(tag & mask)) /* Tags out of synch with mask. */
2276 warning (_("ERROR RMT: threadinfo tag mismatch."));
2280 if (tag == TAG_THREADID)
2284 warning (_("ERROR RMT: length of threadid is not 16."));
2288 pkt = unpack_threadid (pkt, &ref);
2289 mask = mask & ~TAG_THREADID;
2292 if (tag == TAG_EXISTS)
2294 info->active = stub_unpack_int (pkt, length);
2296 mask = mask & ~(TAG_EXISTS);
2299 warning (_("ERROR RMT: 'exists' length too long."));
2305 if (tag == TAG_THREADNAME)
2307 pkt = unpack_string (pkt, &info->shortname[0], length);
2308 mask = mask & ~TAG_THREADNAME;
2311 if (tag == TAG_DISPLAY)
2313 pkt = unpack_string (pkt, &info->display[0], length);
2314 mask = mask & ~TAG_DISPLAY;
2317 if (tag == TAG_MOREDISPLAY)
2319 pkt = unpack_string (pkt, &info->more_display[0], length);
2320 mask = mask & ~TAG_MOREDISPLAY;
2323 warning (_("ERROR RMT: unknown thread info tag."));
2324 break; /* Not a tag we know about. */
2330 remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
2331 struct gdb_ext_thread_info *info)
2333 struct remote_state *rs = get_remote_state ();
2336 pack_threadinfo_request (rs->buf, fieldset, threadid);
2338 getpkt (&rs->buf, &rs->buf_size, 0);
2340 if (rs->buf[0] == '\0')
2343 result = remote_unpack_thread_info_response (rs->buf + 2,
2348 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2351 pack_threadlist_request (char *pkt, int startflag, int threadcount,
2352 threadref *nextthread)
2354 *pkt++ = 'q'; /* info query packet */
2355 *pkt++ = 'L'; /* Process LIST or threadLIST request */
2356 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
2357 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
2358 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
2363 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2366 parse_threadlist_response (char *pkt, int result_limit,
2367 threadref *original_echo, threadref *resultlist,
2370 struct remote_state *rs = get_remote_state ();
2372 int count, resultcount, done;
2375 /* Assume the 'q' and 'M chars have been stripped. */
2376 limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE);
2377 /* done parse past here */
2378 pkt = unpack_byte (pkt, &count); /* count field */
2379 pkt = unpack_nibble (pkt, &done);
2380 /* The first threadid is the argument threadid. */
2381 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
2382 while ((count-- > 0) && (pkt < limit))
2384 pkt = unpack_threadid (pkt, resultlist++);
2385 if (resultcount++ >= result_limit)
2394 remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
2395 int *done, int *result_count, threadref *threadlist)
2397 struct remote_state *rs = get_remote_state ();
2398 static threadref echo_nextthread;
2401 /* Trancate result limit to be smaller than the packet size. */
2402 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10)
2403 >= get_remote_packet_size ())
2404 result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2;
2406 pack_threadlist_request (rs->buf, startflag, result_limit, nextthread);
2408 getpkt (&rs->buf, &rs->buf_size, 0);
2410 if (*rs->buf == '\0')
2414 parse_threadlist_response (rs->buf + 2, result_limit, &echo_nextthread,
2417 if (!threadmatch (&echo_nextthread, nextthread))
2419 /* FIXME: This is a good reason to drop the packet. */
2420 /* Possably, there is a duplicate response. */
2422 retransmit immediatly - race conditions
2423 retransmit after timeout - yes
2425 wait for packet, then exit
2427 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2428 return 0; /* I choose simply exiting. */
2430 if (*result_count <= 0)
2434 warning (_("RMT ERROR : failed to get remote thread list."));
2437 return result; /* break; */
2439 if (*result_count > result_limit)
2442 warning (_("RMT ERROR: threadlist response longer than requested."));
2448 /* This is the interface between remote and threads, remotes upper
2451 /* remote_find_new_threads retrieves the thread list and for each
2452 thread in the list, looks up the thread in GDB's internal list,
2453 adding the thread if it does not already exist. This involves
2454 getting partial thread lists from the remote target so, polling the
2455 quit_flag is required. */
2458 /* About this many threadisds fit in a packet. */
2460 #define MAXTHREADLISTRESULTS 32
2463 remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
2466 int done, i, result_count;
2470 static threadref nextthread;
2471 static threadref resultthreadlist[MAXTHREADLISTRESULTS];
2476 if (loopcount++ > looplimit)
2479 warning (_("Remote fetch threadlist -infinite loop-."));
2482 if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS,
2483 &done, &result_count, resultthreadlist))
2488 /* Clear for later iterations. */
2490 /* Setup to resume next batch of thread references, set nextthread. */
2491 if (result_count >= 1)
2492 copy_threadref (&nextthread, &resultthreadlist[result_count - 1]);
2494 while (result_count--)
2495 if (!(result = (*stepfunction) (&resultthreadlist[i++], context)))
2502 remote_newthread_step (threadref *ref, void *context)
2504 int pid = ptid_get_pid (inferior_ptid);
2505 ptid_t ptid = ptid_build (pid, 0, threadref_to_int (ref));
2507 if (!in_thread_list (ptid))
2509 return 1; /* continue iterator */
2512 #define CRAZY_MAX_THREADS 1000
2515 remote_current_thread (ptid_t oldpid)
2517 struct remote_state *rs = get_remote_state ();
2520 getpkt (&rs->buf, &rs->buf_size, 0);
2521 if (rs->buf[0] == 'Q' && rs->buf[1] == 'C')
2522 return read_ptid (&rs->buf[2], NULL);
2527 /* Find new threads for info threads command.
2528 * Original version, using John Metzler's thread protocol.
2532 remote_find_new_threads (void)
2534 remote_threadlist_iterator (remote_newthread_step, 0,
2538 #if defined(HAVE_LIBEXPAT)
2540 typedef struct thread_item
2546 DEF_VEC_O(thread_item_t);
2548 struct threads_parsing_context
2550 VEC (thread_item_t) *items;
2554 start_thread (struct gdb_xml_parser *parser,
2555 const struct gdb_xml_element *element,
2556 void *user_data, VEC(gdb_xml_value_s) *attributes)
2558 struct threads_parsing_context *data = user_data;
2560 struct thread_item item;
2562 struct gdb_xml_value *attr;
2564 id = xml_find_attribute (attributes, "id")->value;
2565 item.ptid = read_ptid (id, NULL);
2567 attr = xml_find_attribute (attributes, "core");
2569 item.core = *(ULONGEST *) attr->value;
2575 VEC_safe_push (thread_item_t, data->items, &item);
2579 end_thread (struct gdb_xml_parser *parser,
2580 const struct gdb_xml_element *element,
2581 void *user_data, const char *body_text)
2583 struct threads_parsing_context *data = user_data;
2585 if (body_text && *body_text)
2586 VEC_last (thread_item_t, data->items)->extra = xstrdup (body_text);
2589 const struct gdb_xml_attribute thread_attributes[] = {
2590 { "id", GDB_XML_AF_NONE, NULL, NULL },
2591 { "core", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL },
2592 { NULL, GDB_XML_AF_NONE, NULL, NULL }
2595 const struct gdb_xml_element thread_children[] = {
2596 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
2599 const struct gdb_xml_element threads_children[] = {
2600 { "thread", thread_attributes, thread_children,
2601 GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
2602 start_thread, end_thread },
2603 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
2606 const struct gdb_xml_element threads_elements[] = {
2607 { "threads", NULL, threads_children,
2608 GDB_XML_EF_NONE, NULL, NULL },
2609 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
2612 /* Discard the contents of the constructed thread info context. */
2615 clear_threads_parsing_context (void *p)
2617 struct threads_parsing_context *context = p;
2619 struct thread_item *item;
2621 for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i)
2622 xfree (item->extra);
2624 VEC_free (thread_item_t, context->items);
2630 * Find all threads for info threads command.
2631 * Uses new thread protocol contributed by Cisco.
2632 * Falls back and attempts to use the older method (above)
2633 * if the target doesn't respond to the new method.
2637 remote_threads_info (struct target_ops *ops)
2639 struct remote_state *rs = get_remote_state ();
2643 if (remote_desc == 0) /* paranoia */
2644 error (_("Command can only be used when connected to the remote target."));
2646 #if defined(HAVE_LIBEXPAT)
2647 if (remote_protocol_packets[PACKET_qXfer_threads].support == PACKET_ENABLE)
2649 char *xml = target_read_stralloc (¤t_target,
2650 TARGET_OBJECT_THREADS, NULL);
2652 struct cleanup *back_to = make_cleanup (xfree, xml);
2656 struct threads_parsing_context context;
2658 context.items = NULL;
2659 make_cleanup (clear_threads_parsing_context, &context);
2661 if (gdb_xml_parse_quick (_("threads"), "threads.dtd",
2662 threads_elements, xml, &context) == 0)
2665 struct thread_item *item;
2668 VEC_iterate (thread_item_t, context.items, i, item);
2671 if (!ptid_equal (item->ptid, null_ptid))
2673 struct private_thread_info *info;
2674 /* In non-stop mode, we assume new found threads
2675 are running until proven otherwise with a
2676 stop reply. In all-stop, we can only get
2677 here if all threads are stopped. */
2678 int running = non_stop ? 1 : 0;
2680 remote_notice_new_inferior (item->ptid, running);
2682 info = demand_private_info (item->ptid);
2683 info->core = item->core;
2684 info->extra = item->extra;
2691 do_cleanups (back_to);
2696 if (use_threadinfo_query)
2698 putpkt ("qfThreadInfo");
2699 getpkt (&rs->buf, &rs->buf_size, 0);
2701 if (bufp[0] != '\0') /* q packet recognized */
2703 while (*bufp++ == 'm') /* reply contains one or more TID */
2707 new_thread = read_ptid (bufp, &bufp);
2708 if (!ptid_equal (new_thread, null_ptid))
2710 /* In non-stop mode, we assume new found threads
2711 are running until proven otherwise with a
2712 stop reply. In all-stop, we can only get
2713 here if all threads are stopped. */
2714 int running = non_stop ? 1 : 0;
2716 remote_notice_new_inferior (new_thread, running);
2719 while (*bufp++ == ','); /* comma-separated list */
2720 putpkt ("qsThreadInfo");
2721 getpkt (&rs->buf, &rs->buf_size, 0);
2728 /* Only qfThreadInfo is supported in non-stop mode. */
2732 /* Else fall back to old method based on jmetzler protocol. */
2733 use_threadinfo_query = 0;
2734 remote_find_new_threads ();
2739 * Collect a descriptive string about the given thread.
2740 * The target may say anything it wants to about the thread
2741 * (typically info about its blocked / runnable state, name, etc.).
2742 * This string will appear in the info threads display.
2744 * Optional: targets are not required to implement this function.
2748 remote_threads_extra_info (struct thread_info *tp)
2750 struct remote_state *rs = get_remote_state ();
2754 struct gdb_ext_thread_info threadinfo;
2755 static char display_buf[100]; /* arbitrary... */
2756 int n = 0; /* position in display_buf */
2758 if (remote_desc == 0) /* paranoia */
2759 internal_error (__FILE__, __LINE__,
2760 _("remote_threads_extra_info"));
2762 if (ptid_equal (tp->ptid, magic_null_ptid)
2763 || (ptid_get_pid (tp->ptid) != 0 && ptid_get_tid (tp->ptid) == 0))
2764 /* This is the main thread which was added by GDB. The remote
2765 server doesn't know about it. */
2768 if (remote_protocol_packets[PACKET_qXfer_threads].support == PACKET_ENABLE)
2770 struct thread_info *info = find_thread_ptid (tp->ptid);
2772 if (info && info->private)
2773 return info->private->extra;
2778 if (use_threadextra_query)
2781 char *endb = rs->buf + get_remote_packet_size ();
2783 xsnprintf (b, endb - b, "qThreadExtraInfo,");
2785 write_ptid (b, endb, tp->ptid);
2788 getpkt (&rs->buf, &rs->buf_size, 0);
2789 if (rs->buf[0] != 0)
2791 n = min (strlen (rs->buf) / 2, sizeof (display_buf));
2792 result = hex2bin (rs->buf, (gdb_byte *) display_buf, n);
2793 display_buf [result] = '\0';
2798 /* If the above query fails, fall back to the old method. */
2799 use_threadextra_query = 0;
2800 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
2801 | TAG_MOREDISPLAY | TAG_DISPLAY;
2802 int_to_threadref (&id, ptid_get_tid (tp->ptid));
2803 if (remote_get_threadinfo (&id, set, &threadinfo))
2804 if (threadinfo.active)
2806 if (*threadinfo.shortname)
2807 n += xsnprintf (&display_buf[0], sizeof (display_buf) - n,
2808 " Name: %s,", threadinfo.shortname);
2809 if (*threadinfo.display)
2810 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
2811 " State: %s,", threadinfo.display);
2812 if (*threadinfo.more_display)
2813 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
2814 " Priority: %s", threadinfo.more_display);
2818 /* For purely cosmetic reasons, clear up trailing commas. */
2819 if (',' == display_buf[n-1])
2820 display_buf[n-1] = ' ';
2829 remote_static_tracepoint_marker_at (CORE_ADDR addr,
2830 struct static_tracepoint_marker *marker)
2832 struct remote_state *rs = get_remote_state ();
2835 sprintf (p, "qTSTMat:");
2837 p += hexnumstr (p, addr);
2839 getpkt (&rs->buf, &rs->buf_size, 0);
2843 error (_("Remote failure reply: %s"), p);
2847 parse_static_tracepoint_marker_definition (p, &p, marker);
2855 free_current_marker (void *arg)
2857 struct static_tracepoint_marker **marker_p = arg;
2859 if (*marker_p != NULL)
2861 release_static_tracepoint_marker (*marker_p);
2868 static VEC(static_tracepoint_marker_p) *
2869 remote_static_tracepoint_markers_by_strid (const char *strid)
2871 struct remote_state *rs = get_remote_state ();
2872 VEC(static_tracepoint_marker_p) *markers = NULL;
2873 struct static_tracepoint_marker *marker = NULL;
2874 struct cleanup *old_chain;
2877 /* Ask for a first packet of static tracepoint marker
2880 getpkt (&rs->buf, &rs->buf_size, 0);
2883 error (_("Remote failure reply: %s"), p);
2885 old_chain = make_cleanup (free_current_marker, &marker);
2890 marker = XCNEW (struct static_tracepoint_marker);
2894 parse_static_tracepoint_marker_definition (p, &p, marker);
2896 if (strid == NULL || strcmp (strid, marker->str_id) == 0)
2898 VEC_safe_push (static_tracepoint_marker_p,
2904 release_static_tracepoint_marker (marker);
2905 memset (marker, 0, sizeof (*marker));
2908 while (*p++ == ','); /* comma-separated list */
2909 /* Ask for another packet of static tracepoint definition. */
2911 getpkt (&rs->buf, &rs->buf_size, 0);
2915 do_cleanups (old_chain);
2920 /* Implement the to_get_ada_task_ptid function for the remote targets. */
2923 remote_get_ada_task_ptid (long lwp, long thread)
2925 return ptid_build (ptid_get_pid (inferior_ptid), 0, lwp);
2929 /* Restart the remote side; this is an extended protocol operation. */
2932 extended_remote_restart (void)
2934 struct remote_state *rs = get_remote_state ();
2936 /* Send the restart command; for reasons I don't understand the
2937 remote side really expects a number after the "R". */
2938 xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0);
2941 remote_fileio_reset ();
2944 /* Clean up connection to a remote debugger. */
2947 remote_close (int quitting)
2949 if (remote_desc == NULL)
2950 return; /* already closed */
2952 /* Make sure we leave stdin registered in the event loop, and we
2953 don't leave the async SIGINT signal handler installed. */
2954 remote_terminal_ours ();
2956 serial_close (remote_desc);
2959 /* We don't have a connection to the remote stub anymore. Get rid
2960 of all the inferiors and their threads we were controlling.
2961 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
2962 will be unable to find the thread corresponding to (pid, 0, 0). */
2963 inferior_ptid = null_ptid;
2964 discard_all_inferiors ();
2966 /* We're no longer interested in any of these events. */
2967 discard_pending_stop_replies (-1);
2969 if (remote_async_inferior_event_token)
2970 delete_async_event_handler (&remote_async_inferior_event_token);
2971 if (remote_async_get_pending_events_token)
2972 delete_async_event_handler (&remote_async_get_pending_events_token);
2975 /* Query the remote side for the text, data and bss offsets. */
2980 struct remote_state *rs = get_remote_state ();
2983 int lose, num_segments = 0, do_sections, do_segments;
2984 CORE_ADDR text_addr, data_addr, bss_addr, segments[2];
2985 struct section_offsets *offs;
2986 struct symfile_segment_data *data;
2988 if (symfile_objfile == NULL)
2991 putpkt ("qOffsets");
2992 getpkt (&rs->buf, &rs->buf_size, 0);
2995 if (buf[0] == '\000')
2996 return; /* Return silently. Stub doesn't support
3000 warning (_("Remote failure reply: %s"), buf);
3004 /* Pick up each field in turn. This used to be done with scanf, but
3005 scanf will make trouble if CORE_ADDR size doesn't match
3006 conversion directives correctly. The following code will work
3007 with any size of CORE_ADDR. */
3008 text_addr = data_addr = bss_addr = 0;
3012 if (strncmp (ptr, "Text=", 5) == 0)
3015 /* Don't use strtol, could lose on big values. */
3016 while (*ptr && *ptr != ';')
3017 text_addr = (text_addr << 4) + fromhex (*ptr++);
3019 if (strncmp (ptr, ";Data=", 6) == 0)
3022 while (*ptr && *ptr != ';')
3023 data_addr = (data_addr << 4) + fromhex (*ptr++);
3028 if (!lose && strncmp (ptr, ";Bss=", 5) == 0)
3031 while (*ptr && *ptr != ';')
3032 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
3034 if (bss_addr != data_addr)
3035 warning (_("Target reported unsupported offsets: %s"), buf);
3040 else if (strncmp (ptr, "TextSeg=", 8) == 0)
3043 /* Don't use strtol, could lose on big values. */
3044 while (*ptr && *ptr != ';')
3045 text_addr = (text_addr << 4) + fromhex (*ptr++);
3048 if (strncmp (ptr, ";DataSeg=", 9) == 0)
3051 while (*ptr && *ptr != ';')
3052 data_addr = (data_addr << 4) + fromhex (*ptr++);
3060 error (_("Malformed response to offset query, %s"), buf);
3061 else if (*ptr != '\0')
3062 warning (_("Target reported unsupported offsets: %s"), buf);
3064 offs = ((struct section_offsets *)
3065 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
3066 memcpy (offs, symfile_objfile->section_offsets,
3067 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
3069 data = get_symfile_segment_data (symfile_objfile->obfd);
3070 do_segments = (data != NULL);
3071 do_sections = num_segments == 0;
3073 if (num_segments > 0)
3075 segments[0] = text_addr;
3076 segments[1] = data_addr;
3078 /* If we have two segments, we can still try to relocate everything
3079 by assuming that the .text and .data offsets apply to the whole
3080 text and data segments. Convert the offsets given in the packet
3081 to base addresses for symfile_map_offsets_to_segments. */
3082 else if (data && data->num_segments == 2)
3084 segments[0] = data->segment_bases[0] + text_addr;
3085 segments[1] = data->segment_bases[1] + data_addr;
3088 /* If the object file has only one segment, assume that it is text
3089 rather than data; main programs with no writable data are rare,
3090 but programs with no code are useless. Of course the code might
3091 have ended up in the data segment... to detect that we would need
3092 the permissions here. */
3093 else if (data && data->num_segments == 1)
3095 segments[0] = data->segment_bases[0] + text_addr;
3098 /* There's no way to relocate by segment. */
3104 int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data,
3105 offs, num_segments, segments);
3107 if (ret == 0 && !do_sections)
3108 error (_("Can not handle qOffsets TextSeg "
3109 "response with this symbol file"));
3116 free_symfile_segment_data (data);
3120 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
3122 /* This is a temporary kludge to force data and bss to use the
3123 same offsets because that's what nlmconv does now. The real
3124 solution requires changes to the stub and remote.c that I
3125 don't have time to do right now. */
3127 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
3128 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
3131 objfile_relocate (symfile_objfile, offs);
3134 /* Callback for iterate_over_threads. Set the STOP_REQUESTED flags in
3135 threads we know are stopped already. This is used during the
3136 initial remote connection in non-stop mode --- threads that are
3137 reported as already being stopped are left stopped. */
3140 set_stop_requested_callback (struct thread_info *thread, void *data)
3142 /* If we have a stop reply for this thread, it must be stopped. */
3143 if (peek_stop_reply (thread->ptid))
3144 set_stop_requested (thread->ptid, 1);
3149 /* Send interrupt_sequence to remote target. */
3151 send_interrupt_sequence (void)
3153 if (interrupt_sequence_mode == interrupt_sequence_control_c)
3154 serial_write (remote_desc, "\x03", 1);
3155 else if (interrupt_sequence_mode == interrupt_sequence_break)
3156 serial_send_break (remote_desc);
3157 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
3159 serial_send_break (remote_desc);
3160 serial_write (remote_desc, "g", 1);
3163 internal_error (__FILE__, __LINE__,
3164 _("Invalid value for interrupt_sequence_mode: %s."),
3165 interrupt_sequence_mode);
3168 /* Query the remote target for which is the current thread/process,
3169 add it to our tables, and update INFERIOR_PTID. The caller is
3170 responsible for setting the state such that the remote end is ready
3171 to return the current thread. */
3174 add_current_inferior_and_thread (void)
3176 struct remote_state *rs = get_remote_state ();
3180 inferior_ptid = null_ptid;
3182 /* Now, if we have thread information, update inferior_ptid. */
3183 ptid = remote_current_thread (inferior_ptid);
3184 if (!ptid_equal (ptid, null_ptid))
3186 if (!remote_multi_process_p (rs))
3189 inferior_ptid = ptid;
3193 /* Without this, some commands which require an active target
3194 (such as kill) won't work. This variable serves (at least)
3195 double duty as both the pid of the target process (if it has
3196 such), and as a flag indicating that a target is active. */
3197 inferior_ptid = magic_null_ptid;
3201 remote_add_inferior (fake_pid_p, ptid_get_pid (inferior_ptid), -1);
3203 /* Add the main thread. */
3204 add_thread_silent (inferior_ptid);
3208 remote_start_remote (int from_tty, struct target_ops *target, int extended_p)
3210 struct remote_state *rs = get_remote_state ();
3211 struct packet_config *noack_config;
3212 char *wait_status = NULL;
3214 immediate_quit++; /* Allow user to interrupt it. */
3216 if (interrupt_on_connect)
3217 send_interrupt_sequence ();
3219 /* Ack any packet which the remote side has already sent. */
3220 serial_write (remote_desc, "+", 1);
3222 /* The first packet we send to the target is the optional "supported
3223 packets" request. If the target can answer this, it will tell us
3224 which later probes to skip. */
3225 remote_query_supported ();
3227 /* If the stub wants to get a QAllow, compose one and send it. */
3228 if (remote_protocol_packets[PACKET_QAllow].support != PACKET_DISABLE)
3229 remote_set_permissions ();
3231 /* Next, we possibly activate noack mode.
3233 If the QStartNoAckMode packet configuration is set to AUTO,
3234 enable noack mode if the stub reported a wish for it with
3237 If set to TRUE, then enable noack mode even if the stub didn't
3238 report it in qSupported. If the stub doesn't reply OK, the
3239 session ends with an error.
3241 If FALSE, then don't activate noack mode, regardless of what the
3242 stub claimed should be the default with qSupported. */
3244 noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode];
3246 if (noack_config->detect == AUTO_BOOLEAN_TRUE
3247 || (noack_config->detect == AUTO_BOOLEAN_AUTO
3248 && noack_config->support == PACKET_ENABLE))
3250 putpkt ("QStartNoAckMode");
3251 getpkt (&rs->buf, &rs->buf_size, 0);
3252 if (packet_ok (rs->buf, noack_config) == PACKET_OK)
3258 /* Tell the remote that we are using the extended protocol. */
3260 getpkt (&rs->buf, &rs->buf_size, 0);
3263 /* Next, if the target can specify a description, read it. We do
3264 this before anything involving memory or registers. */
3265 target_find_description ();
3267 /* Next, now that we know something about the target, update the
3268 address spaces in the program spaces. */
3269 update_address_spaces ();
3271 /* On OSs where the list of libraries is global to all
3272 processes, we fetch them early. */
3273 if (gdbarch_has_global_solist (target_gdbarch))
3274 solib_add (NULL, from_tty, target, auto_solib_add);
3278 if (!rs->non_stop_aware)
3279 error (_("Non-stop mode requested, but remote "
3280 "does not support non-stop"));
3282 putpkt ("QNonStop:1");
3283 getpkt (&rs->buf, &rs->buf_size, 0);
3285 if (strcmp (rs->buf, "OK") != 0)
3286 error (_("Remote refused setting non-stop mode with: %s"), rs->buf);
3288 /* Find about threads and processes the stub is already
3289 controlling. We default to adding them in the running state.
3290 The '?' query below will then tell us about which threads are
3292 remote_threads_info (target);
3294 else if (rs->non_stop_aware)
3296 /* Don't assume that the stub can operate in all-stop mode.
3297 Request it explicitely. */
3298 putpkt ("QNonStop:0");
3299 getpkt (&rs->buf, &rs->buf_size, 0);
3301 if (strcmp (rs->buf, "OK") != 0)
3302 error (_("Remote refused setting all-stop mode with: %s"), rs->buf);
3305 /* Check whether the target is running now. */
3307 getpkt (&rs->buf, &rs->buf_size, 0);
3313 struct inferior *inf;
3315 if (rs->buf[0] == 'W' || rs->buf[0] == 'X')
3318 error (_("The target is not running (try extended-remote?)"));
3320 /* We're connected, but not running. Drop out before we
3321 call start_remote. */
3326 /* Save the reply for later. */
3327 wait_status = alloca (strlen (rs->buf) + 1);
3328 strcpy (wait_status, rs->buf);
3331 /* Let the stub know that we want it to return the thread. */
3332 set_continue_thread (minus_one_ptid);
3334 add_current_inferior_and_thread ();
3336 /* init_wait_for_inferior should be called before get_offsets in order
3337 to manage `inserted' flag in bp loc in a correct state.
3338 breakpoint_init_inferior, called from init_wait_for_inferior, set
3339 `inserted' flag to 0, while before breakpoint_re_set, called from
3340 start_remote, set `inserted' flag to 1. In the initialization of
3341 inferior, breakpoint_init_inferior should be called first, and then
3342 breakpoint_re_set can be called. If this order is broken, state of
3343 `inserted' flag is wrong, and cause some problems on breakpoint
3345 init_wait_for_inferior ();
3347 get_offsets (); /* Get text, data & bss offsets. */
3349 /* If we could not find a description using qXfer, and we know
3350 how to do it some other way, try again. This is not
3351 supported for non-stop; it could be, but it is tricky if
3352 there are no stopped threads when we connect. */
3353 if (remote_read_description_p (target)
3354 && gdbarch_target_desc (target_gdbarch) == NULL)
3356 target_clear_description ();
3357 target_find_description ();
3360 /* Use the previously fetched status. */
3361 gdb_assert (wait_status != NULL);
3362 strcpy (rs->buf, wait_status);
3363 rs->cached_wait_status = 1;
3366 start_remote (from_tty); /* Initialize gdb process mechanisms. */
3370 /* Clear WFI global state. Do this before finding about new
3371 threads and inferiors, and setting the current inferior.
3372 Otherwise we would clear the proceed status of the current
3373 inferior when we want its stop_soon state to be preserved
3374 (see notice_new_inferior). */
3375 init_wait_for_inferior ();
3377 /* In non-stop, we will either get an "OK", meaning that there
3378 are no stopped threads at this time; or, a regular stop
3379 reply. In the latter case, there may be more than one thread
3380 stopped --- we pull them all out using the vStopped
3382 if (strcmp (rs->buf, "OK") != 0)
3384 struct stop_reply *stop_reply;
3385 struct cleanup *old_chain;
3387 stop_reply = stop_reply_xmalloc ();
3388 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
3390 remote_parse_stop_reply (rs->buf, stop_reply);
3391 discard_cleanups (old_chain);
3393 /* get_pending_stop_replies acks this one, and gets the rest
3395 pending_stop_reply = stop_reply;
3396 remote_get_pending_stop_replies ();
3398 /* Make sure that threads that were stopped remain
3400 iterate_over_threads (set_stop_requested_callback, NULL);
3403 if (target_can_async_p ())
3404 target_async (inferior_event_handler, 0);
3406 if (thread_count () == 0)
3409 error (_("The target is not running (try extended-remote?)"));
3411 /* We're connected, but not running. Drop out before we
3412 call start_remote. */
3416 /* Let the stub know that we want it to return the thread. */
3418 /* Force the stub to choose a thread. */
3419 set_general_thread (null_ptid);
3422 inferior_ptid = remote_current_thread (minus_one_ptid);
3423 if (ptid_equal (inferior_ptid, minus_one_ptid))
3424 error (_("remote didn't report the current thread in non-stop mode"));
3426 get_offsets (); /* Get text, data & bss offsets. */
3428 /* In non-stop mode, any cached wait status will be stored in
3429 the stop reply queue. */
3430 gdb_assert (wait_status == NULL);
3432 /* Report all signals during attach/startup. */
3433 remote_pass_signals (0, NULL);
3436 /* If we connected to a live target, do some additional setup. */
3437 if (target_has_execution)
3439 if (exec_bfd) /* No use without an exec file. */
3440 remote_check_symbols (symfile_objfile);
3443 /* Possibly the target has been engaged in a trace run started
3444 previously; find out where things are at. */
3445 if (remote_get_trace_status (current_trace_status ()) != -1)
3447 struct uploaded_tp *uploaded_tps = NULL;
3448 struct uploaded_tsv *uploaded_tsvs = NULL;
3450 if (current_trace_status ()->running)
3451 printf_filtered (_("Trace is already running on the target.\n"));
3453 /* Get trace state variables first, they may be checked when
3454 parsing uploaded commands. */
3456 remote_upload_trace_state_variables (&uploaded_tsvs);
3458 merge_uploaded_trace_state_variables (&uploaded_tsvs);
3460 remote_upload_tracepoints (&uploaded_tps);
3462 merge_uploaded_tracepoints (&uploaded_tps);
3465 /* If breakpoints are global, insert them now. */
3466 if (gdbarch_has_global_breakpoints (target_gdbarch)
3467 && breakpoints_always_inserted_mode ())
3468 insert_breakpoints ();
3471 /* Open a connection to a remote debugger.
3472 NAME is the filename used for communication. */
3475 remote_open (char *name, int from_tty)
3477 remote_open_1 (name, from_tty, &remote_ops, 0);
3480 /* Open a connection to a remote debugger using the extended
3481 remote gdb protocol. NAME is the filename used for communication. */
3484 extended_remote_open (char *name, int from_tty)
3486 remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */);
3489 /* Generic code for opening a connection to a remote target. */
3492 init_all_packet_configs (void)
3496 for (i = 0; i < PACKET_MAX; i++)
3497 update_packet_config (&remote_protocol_packets[i]);
3500 /* Symbol look-up. */
3503 remote_check_symbols (struct objfile *objfile)
3505 struct remote_state *rs = get_remote_state ();
3506 char *msg, *reply, *tmp;
3507 struct minimal_symbol *sym;
3510 /* The remote side has no concept of inferiors that aren't running
3511 yet, it only knows about running processes. If we're connected
3512 but our current inferior is not running, we should not invite the
3513 remote target to request symbol lookups related to its
3514 (unrelated) current process. */
3515 if (!target_has_execution)
3518 if (remote_protocol_packets[PACKET_qSymbol].support == PACKET_DISABLE)
3521 /* Make sure the remote is pointing at the right process. Note
3522 there's no way to select "no process". */
3523 set_general_process ();
3525 /* Allocate a message buffer. We can't reuse the input buffer in RS,
3526 because we need both at the same time. */
3527 msg = alloca (get_remote_packet_size ());
3529 /* Invite target to request symbol lookups. */
3531 putpkt ("qSymbol::");
3532 getpkt (&rs->buf, &rs->buf_size, 0);
3533 packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSymbol]);
3536 while (strncmp (reply, "qSymbol:", 8) == 0)
3539 end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2);
3541 sym = lookup_minimal_symbol (msg, NULL, NULL);
3543 xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]);
3546 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
3547 CORE_ADDR sym_addr = SYMBOL_VALUE_ADDRESS (sym);
3549 /* If this is a function address, return the start of code
3550 instead of any data function descriptor. */
3551 sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch,
3555 xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s",
3556 phex_nz (sym_addr, addr_size), &reply[8]);
3560 getpkt (&rs->buf, &rs->buf_size, 0);
3565 static struct serial *
3566 remote_serial_open (char *name)
3568 static int udp_warning = 0;
3570 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
3571 of in ser-tcp.c, because it is the remote protocol assuming that the
3572 serial connection is reliable and not the serial connection promising
3574 if (!udp_warning && strncmp (name, "udp:", 4) == 0)
3576 warning (_("The remote protocol may be unreliable over UDP.\n"
3577 "Some events may be lost, rendering further debugging "
3582 return serial_open (name);
3585 /* Inform the target of our permission settings. The permission flags
3586 work without this, but if the target knows the settings, it can do
3587 a couple things. First, it can add its own check, to catch cases
3588 that somehow manage to get by the permissions checks in target
3589 methods. Second, if the target is wired to disallow particular
3590 settings (for instance, a system in the field that is not set up to
3591 be able to stop at a breakpoint), it can object to any unavailable
3595 remote_set_permissions (void)
3597 struct remote_state *rs = get_remote_state ();
3599 sprintf (rs->buf, "QAllow:"
3600 "WriteReg:%x;WriteMem:%x;"
3601 "InsertBreak:%x;InsertTrace:%x;"
3602 "InsertFastTrace:%x;Stop:%x",
3603 may_write_registers, may_write_memory,
3604 may_insert_breakpoints, may_insert_tracepoints,
3605 may_insert_fast_tracepoints, may_stop);
3607 getpkt (&rs->buf, &rs->buf_size, 0);
3609 /* If the target didn't like the packet, warn the user. Do not try
3610 to undo the user's settings, that would just be maddening. */
3611 if (strcmp (rs->buf, "OK") != 0)
3612 warning (_("Remote refused setting permissions with: %s"), rs->buf);
3615 /* This type describes each known response to the qSupported
3617 struct protocol_feature
3619 /* The name of this protocol feature. */
3622 /* The default for this protocol feature. */
3623 enum packet_support default_support;
3625 /* The function to call when this feature is reported, or after
3626 qSupported processing if the feature is not supported.
3627 The first argument points to this structure. The second
3628 argument indicates whether the packet requested support be
3629 enabled, disabled, or probed (or the default, if this function
3630 is being called at the end of processing and this feature was
3631 not reported). The third argument may be NULL; if not NULL, it
3632 is a NUL-terminated string taken from the packet following
3633 this feature's name and an equals sign. */
3634 void (*func) (const struct protocol_feature *, enum packet_support,
3637 /* The corresponding packet for this feature. Only used if
3638 FUNC is remote_supported_packet. */
3643 remote_supported_packet (const struct protocol_feature *feature,
3644 enum packet_support support,
3645 const char *argument)
3649 warning (_("Remote qSupported response supplied an unexpected value for"
3650 " \"%s\"."), feature->name);
3654 if (remote_protocol_packets[feature->packet].support
3655 == PACKET_SUPPORT_UNKNOWN)
3656 remote_protocol_packets[feature->packet].support = support;
3660 remote_packet_size (const struct protocol_feature *feature,
3661 enum packet_support support, const char *value)
3663 struct remote_state *rs = get_remote_state ();
3668 if (support != PACKET_ENABLE)
3671 if (value == NULL || *value == '\0')
3673 warning (_("Remote target reported \"%s\" without a size."),
3679 packet_size = strtol (value, &value_end, 16);
3680 if (errno != 0 || *value_end != '\0' || packet_size < 0)
3682 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
3683 feature->name, value);
3687 if (packet_size > MAX_REMOTE_PACKET_SIZE)
3689 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
3690 packet_size, MAX_REMOTE_PACKET_SIZE);
3691 packet_size = MAX_REMOTE_PACKET_SIZE;
3694 /* Record the new maximum packet size. */
3695 rs->explicit_packet_size = packet_size;
3699 remote_multi_process_feature (const struct protocol_feature *feature,
3700 enum packet_support support, const char *value)
3702 struct remote_state *rs = get_remote_state ();
3704 rs->multi_process_aware = (support == PACKET_ENABLE);
3708 remote_non_stop_feature (const struct protocol_feature *feature,
3709 enum packet_support support, const char *value)
3711 struct remote_state *rs = get_remote_state ();
3713 rs->non_stop_aware = (support == PACKET_ENABLE);
3717 remote_cond_tracepoint_feature (const struct protocol_feature *feature,
3718 enum packet_support support,
3721 struct remote_state *rs = get_remote_state ();
3723 rs->cond_tracepoints = (support == PACKET_ENABLE);
3727 remote_cond_breakpoint_feature (const struct protocol_feature *feature,
3728 enum packet_support support,
3731 struct remote_state *rs = get_remote_state ();
3733 rs->cond_breakpoints = (support == PACKET_ENABLE);
3737 remote_fast_tracepoint_feature (const struct protocol_feature *feature,
3738 enum packet_support support,
3741 struct remote_state *rs = get_remote_state ();
3743 rs->fast_tracepoints = (support == PACKET_ENABLE);
3747 remote_static_tracepoint_feature (const struct protocol_feature *feature,
3748 enum packet_support support,
3751 struct remote_state *rs = get_remote_state ();
3753 rs->static_tracepoints = (support == PACKET_ENABLE);
3757 remote_install_in_trace_feature (const struct protocol_feature *feature,
3758 enum packet_support support,
3761 struct remote_state *rs = get_remote_state ();
3763 rs->install_in_trace = (support == PACKET_ENABLE);
3767 remote_disconnected_tracing_feature (const struct protocol_feature *feature,
3768 enum packet_support support,
3771 struct remote_state *rs = get_remote_state ();
3773 rs->disconnected_tracing = (support == PACKET_ENABLE);
3777 remote_enable_disable_tracepoint_feature (const struct protocol_feature *feature,
3778 enum packet_support support,
3781 struct remote_state *rs = get_remote_state ();
3783 rs->enable_disable_tracepoints = (support == PACKET_ENABLE);
3787 remote_string_tracing_feature (const struct protocol_feature *feature,
3788 enum packet_support support,
3791 struct remote_state *rs = get_remote_state ();
3793 rs->string_tracing = (support == PACKET_ENABLE);
3796 static struct protocol_feature remote_protocol_features[] = {
3797 { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
3798 { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
3799 PACKET_qXfer_auxv },
3800 { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet,
3801 PACKET_qXfer_features },
3802 { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet,
3803 PACKET_qXfer_libraries },
3804 { "qXfer:libraries-svr4:read", PACKET_DISABLE, remote_supported_packet,
3805 PACKET_qXfer_libraries_svr4 },
3806 { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet,
3807 PACKET_qXfer_memory_map },
3808 { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet,
3809 PACKET_qXfer_spu_read },
3810 { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet,
3811 PACKET_qXfer_spu_write },
3812 { "qXfer:osdata:read", PACKET_DISABLE, remote_supported_packet,
3813 PACKET_qXfer_osdata },
3814 { "qXfer:threads:read", PACKET_DISABLE, remote_supported_packet,
3815 PACKET_qXfer_threads },
3816 { "qXfer:traceframe-info:read", PACKET_DISABLE, remote_supported_packet,
3817 PACKET_qXfer_traceframe_info },
3818 { "QPassSignals", PACKET_DISABLE, remote_supported_packet,
3819 PACKET_QPassSignals },
3820 { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet,
3821 PACKET_QStartNoAckMode },
3822 { "multiprocess", PACKET_DISABLE, remote_multi_process_feature, -1 },
3823 { "QNonStop", PACKET_DISABLE, remote_non_stop_feature, -1 },
3824 { "qXfer:siginfo:read", PACKET_DISABLE, remote_supported_packet,
3825 PACKET_qXfer_siginfo_read },
3826 { "qXfer:siginfo:write", PACKET_DISABLE, remote_supported_packet,
3827 PACKET_qXfer_siginfo_write },
3828 { "ConditionalTracepoints", PACKET_DISABLE, remote_cond_tracepoint_feature,
3829 PACKET_ConditionalTracepoints },
3830 { "ConditionalBreakpoints", PACKET_DISABLE, remote_cond_breakpoint_feature,
3831 PACKET_ConditionalBreakpoints },
3832 { "FastTracepoints", PACKET_DISABLE, remote_fast_tracepoint_feature,
3833 PACKET_FastTracepoints },
3834 { "StaticTracepoints", PACKET_DISABLE, remote_static_tracepoint_feature,
3835 PACKET_StaticTracepoints },
3836 {"InstallInTrace", PACKET_DISABLE, remote_install_in_trace_feature,
3837 PACKET_InstallInTrace},
3838 { "DisconnectedTracing", PACKET_DISABLE, remote_disconnected_tracing_feature,
3840 { "ReverseContinue", PACKET_DISABLE, remote_supported_packet,
3842 { "ReverseStep", PACKET_DISABLE, remote_supported_packet,
3844 { "TracepointSource", PACKET_DISABLE, remote_supported_packet,
3845 PACKET_TracepointSource },
3846 { "QAllow", PACKET_DISABLE, remote_supported_packet,
3848 { "EnableDisableTracepoints", PACKET_DISABLE,
3849 remote_enable_disable_tracepoint_feature, -1 },
3850 { "qXfer:fdpic:read", PACKET_DISABLE, remote_supported_packet,
3851 PACKET_qXfer_fdpic },
3852 { "QDisableRandomization", PACKET_DISABLE, remote_supported_packet,
3853 PACKET_QDisableRandomization },
3854 { "tracenz", PACKET_DISABLE,
3855 remote_string_tracing_feature, -1 },
3858 static char *remote_support_xml;
3860 /* Register string appended to "xmlRegisters=" in qSupported query. */
3863 register_remote_support_xml (const char *xml)
3865 #if defined(HAVE_LIBEXPAT)
3866 if (remote_support_xml == NULL)
3867 remote_support_xml = concat ("xmlRegisters=", xml, (char *) NULL);
3870 char *copy = xstrdup (remote_support_xml + 13);
3871 char *p = strtok (copy, ",");
3875 if (strcmp (p, xml) == 0)
3882 while ((p = strtok (NULL, ",")) != NULL);
3885 remote_support_xml = reconcat (remote_support_xml,
3886 remote_support_xml, ",", xml,
3893 remote_query_supported_append (char *msg, const char *append)
3896 return reconcat (msg, msg, ";", append, (char *) NULL);
3898 return xstrdup (append);
3902 remote_query_supported (void)
3904 struct remote_state *rs = get_remote_state ();
3907 unsigned char seen [ARRAY_SIZE (remote_protocol_features)];
3909 /* The packet support flags are handled differently for this packet
3910 than for most others. We treat an error, a disabled packet, and
3911 an empty response identically: any features which must be reported
3912 to be used will be automatically disabled. An empty buffer
3913 accomplishes this, since that is also the representation for a list
3914 containing no features. */
3917 if (remote_protocol_packets[PACKET_qSupported].support != PACKET_DISABLE)
3920 struct cleanup *old_chain = make_cleanup (free_current_contents, &q);
3922 q = remote_query_supported_append (q, "multiprocess+");
3924 if (remote_support_xml)
3925 q = remote_query_supported_append (q, remote_support_xml);
3927 q = remote_query_supported_append (q, "qRelocInsn+");
3929 q = reconcat (q, "qSupported:", q, (char *) NULL);
3932 do_cleanups (old_chain);
3934 getpkt (&rs->buf, &rs->buf_size, 0);
3936 /* If an error occured, warn, but do not return - just reset the
3937 buffer to empty and go on to disable features. */
3938 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported])
3941 warning (_("Remote failure reply: %s"), rs->buf);
3946 memset (seen, 0, sizeof (seen));
3951 enum packet_support is_supported;
3952 char *p, *end, *name_end, *value;
3954 /* First separate out this item from the rest of the packet. If
3955 there's another item after this, we overwrite the separator
3956 (terminated strings are much easier to work with). */
3958 end = strchr (p, ';');
3961 end = p + strlen (p);
3971 warning (_("empty item in \"qSupported\" response"));
3976 name_end = strchr (p, '=');
3979 /* This is a name=value entry. */
3980 is_supported = PACKET_ENABLE;
3981 value = name_end + 1;
3990 is_supported = PACKET_ENABLE;
3994 is_supported = PACKET_DISABLE;
3998 is_supported = PACKET_SUPPORT_UNKNOWN;
4002 warning (_("unrecognized item \"%s\" "
4003 "in \"qSupported\" response"), p);
4009 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
4010 if (strcmp (remote_protocol_features[i].name, p) == 0)
4012 const struct protocol_feature *feature;
4015 feature = &remote_protocol_features[i];
4016 feature->func (feature, is_supported, value);
4021 /* If we increased the packet size, make sure to increase the global
4022 buffer size also. We delay this until after parsing the entire
4023 qSupported packet, because this is the same buffer we were
4025 if (rs->buf_size < rs->explicit_packet_size)
4027 rs->buf_size = rs->explicit_packet_size;
4028 rs->buf = xrealloc (rs->buf, rs->buf_size);
4031 /* Handle the defaults for unmentioned features. */
4032 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
4035 const struct protocol_feature *feature;
4037 feature = &remote_protocol_features[i];
4038 feature->func (feature, feature->default_support, NULL);
4044 remote_open_1 (char *name, int from_tty,
4045 struct target_ops *target, int extended_p)
4047 struct remote_state *rs = get_remote_state ();
4050 error (_("To open a remote debug connection, you need to specify what\n"
4051 "serial device is attached to the remote system\n"
4052 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
4054 /* See FIXME above. */
4055 if (!target_async_permitted)
4056 wait_forever_enabled_p = 1;
4058 /* If we're connected to a running target, target_preopen will kill it.
4059 But if we're connected to a target system with no running process,
4060 then we will still be connected when it returns. Ask this question
4061 first, before target_preopen has a chance to kill anything. */
4062 if (remote_desc != NULL && !have_inferiors ())
4065 || query (_("Already connected to a remote target. Disconnect? ")))
4068 error (_("Still connected."));
4071 target_preopen (from_tty);
4073 unpush_target (target);
4075 /* This time without a query. If we were connected to an
4076 extended-remote target and target_preopen killed the running
4077 process, we may still be connected. If we are starting "target
4078 remote" now, the extended-remote target will not have been
4079 removed by unpush_target. */
4080 if (remote_desc != NULL && !have_inferiors ())
4083 /* Make sure we send the passed signals list the next time we resume. */
4084 xfree (last_pass_packet);
4085 last_pass_packet = NULL;
4087 remote_fileio_reset ();
4088 reopen_exec_file ();
4091 remote_desc = remote_serial_open (name);
4093 perror_with_name (name);
4095 if (baud_rate != -1)
4097 if (serial_setbaudrate (remote_desc, baud_rate))
4099 /* The requested speed could not be set. Error out to
4100 top level after closing remote_desc. Take care to
4101 set remote_desc to NULL to avoid closing remote_desc
4103 serial_close (remote_desc);
4105 perror_with_name (name);
4109 serial_raw (remote_desc);
4111 /* If there is something sitting in the buffer we might take it as a
4112 response to a command, which would be bad. */
4113 serial_flush_input (remote_desc);
4117 puts_filtered ("Remote debugging using ");
4118 puts_filtered (name);
4119 puts_filtered ("\n");
4121 push_target (target); /* Switch to using remote target now. */
4123 /* Register extra event sources in the event loop. */
4124 remote_async_inferior_event_token
4125 = create_async_event_handler (remote_async_inferior_event_handler,
4127 remote_async_get_pending_events_token
4128 = create_async_event_handler (remote_async_get_pending_events_handler,
4131 /* Reset the target state; these things will be queried either by
4132 remote_query_supported or as they are needed. */
4133 init_all_packet_configs ();
4134 rs->cached_wait_status = 0;
4135 rs->explicit_packet_size = 0;
4137 rs->multi_process_aware = 0;
4138 rs->extended = extended_p;
4139 rs->non_stop_aware = 0;
4140 rs->waiting_for_stop_reply = 0;
4141 rs->ctrlc_pending_p = 0;
4143 general_thread = not_sent_ptid;
4144 continue_thread = not_sent_ptid;
4145 remote_traceframe_number = -1;
4147 /* Probe for ability to use "ThreadInfo" query, as required. */
4148 use_threadinfo_query = 1;
4149 use_threadextra_query = 1;
4151 if (target_async_permitted)
4153 /* With this target we start out by owning the terminal. */
4154 remote_async_terminal_ours_p = 1;
4156 /* FIXME: cagney/1999-09-23: During the initial connection it is
4157 assumed that the target is already ready and able to respond to
4158 requests. Unfortunately remote_start_remote() eventually calls
4159 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
4160 around this. Eventually a mechanism that allows
4161 wait_for_inferior() to expect/get timeouts will be
4163 wait_forever_enabled_p = 0;
4166 /* First delete any symbols previously loaded from shared libraries. */
4167 no_shared_libraries (NULL, 0);
4170 init_thread_list ();
4172 /* Start the remote connection. If error() or QUIT, discard this
4173 target (we'd otherwise be in an inconsistent state) and then
4174 propogate the error on up the exception chain. This ensures that
4175 the caller doesn't stumble along blindly assuming that the
4176 function succeeded. The CLI doesn't have this problem but other
4177 UI's, such as MI do.
4179 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
4180 this function should return an error indication letting the
4181 caller restore the previous state. Unfortunately the command
4182 ``target remote'' is directly wired to this function making that
4183 impossible. On a positive note, the CLI side of this problem has
4184 been fixed - the function set_cmd_context() makes it possible for
4185 all the ``target ....'' commands to share a common callback
4186 function. See cli-dump.c. */
4188 volatile struct gdb_exception ex;
4190 TRY_CATCH (ex, RETURN_MASK_ALL)
4192 remote_start_remote (from_tty, target, extended_p);
4196 /* Pop the partially set up target - unless something else did
4197 already before throwing the exception. */
4198 if (remote_desc != NULL)
4200 if (target_async_permitted)
4201 wait_forever_enabled_p = 1;
4202 throw_exception (ex);
4206 if (target_async_permitted)
4207 wait_forever_enabled_p = 1;
4210 /* This takes a program previously attached to and detaches it. After
4211 this is done, GDB can be used to debug some other program. We
4212 better not have left any breakpoints in the target program or it'll
4213 die when it hits one. */
4216 remote_detach_1 (char *args, int from_tty, int extended)
4218 int pid = ptid_get_pid (inferior_ptid);
4219 struct remote_state *rs = get_remote_state ();
4222 error (_("Argument given to \"detach\" when remotely debugging."));
4224 if (!target_has_execution)
4225 error (_("No process to detach from."));
4229 char *exec_file = get_exec_file (0);
4230 if (exec_file == NULL)
4232 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file,
4233 target_pid_to_str (pid_to_ptid (pid)));
4234 gdb_flush (gdb_stdout);
4237 /* Tell the remote target to detach. */
4238 if (remote_multi_process_p (rs))
4239 sprintf (rs->buf, "D;%x", pid);
4241 strcpy (rs->buf, "D");
4244 getpkt (&rs->buf, &rs->buf_size, 0);
4246 if (rs->buf[0] == 'O' && rs->buf[1] == 'K')
4248 else if (rs->buf[0] == '\0')
4249 error (_("Remote doesn't know how to detach"));
4251 error (_("Can't detach process."));
4253 if (from_tty && !extended)
4254 puts_filtered (_("Ending remote debugging.\n"));
4256 discard_pending_stop_replies (pid);
4257 target_mourn_inferior ();
4261 remote_detach (struct target_ops *ops, char *args, int from_tty)
4263 remote_detach_1 (args, from_tty, 0);
4267 extended_remote_detach (struct target_ops *ops, char *args, int from_tty)
4269 remote_detach_1 (args, from_tty, 1);
4272 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
4275 remote_disconnect (struct target_ops *target, char *args, int from_tty)
4278 error (_("Argument given to \"disconnect\" when remotely debugging."));
4280 /* Make sure we unpush even the extended remote targets; mourn
4281 won't do it. So call remote_mourn_1 directly instead of
4282 target_mourn_inferior. */
4283 remote_mourn_1 (target);
4286 puts_filtered ("Ending remote debugging.\n");
4289 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
4290 be chatty about it. */
4293 extended_remote_attach_1 (struct target_ops *target, char *args, int from_tty)
4295 struct remote_state *rs = get_remote_state ();
4297 char *wait_status = NULL;
4299 pid = parse_pid_to_attach (args);
4301 /* Remote PID can be freely equal to getpid, do not check it here the same
4302 way as in other targets. */
4304 if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE)
4305 error (_("This target does not support attaching to a process"));
4309 char *exec_file = get_exec_file (0);
4312 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file,
4313 target_pid_to_str (pid_to_ptid (pid)));
4315 printf_unfiltered (_("Attaching to %s\n"),
4316 target_pid_to_str (pid_to_ptid (pid)));
4318 gdb_flush (gdb_stdout);
4321 sprintf (rs->buf, "vAttach;%x", pid);
4323 getpkt (&rs->buf, &rs->buf_size, 0);
4325 if (packet_ok (rs->buf,
4326 &remote_protocol_packets[PACKET_vAttach]) == PACKET_OK)
4330 /* Save the reply for later. */
4331 wait_status = alloca (strlen (rs->buf) + 1);
4332 strcpy (wait_status, rs->buf);
4334 else if (strcmp (rs->buf, "OK") != 0)
4335 error (_("Attaching to %s failed with: %s"),
4336 target_pid_to_str (pid_to_ptid (pid)),
4339 else if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE)
4340 error (_("This target does not support attaching to a process"));
4342 error (_("Attaching to %s failed"),
4343 target_pid_to_str (pid_to_ptid (pid)));
4345 set_current_inferior (remote_add_inferior (0, pid, 1));
4347 inferior_ptid = pid_to_ptid (pid);
4351 struct thread_info *thread;
4353 /* Get list of threads. */
4354 remote_threads_info (target);
4356 thread = first_thread_of_process (pid);
4358 inferior_ptid = thread->ptid;
4360 inferior_ptid = pid_to_ptid (pid);
4362 /* Invalidate our notion of the remote current thread. */
4363 record_currthread (minus_one_ptid);
4367 /* Now, if we have thread information, update inferior_ptid. */
4368 inferior_ptid = remote_current_thread (inferior_ptid);
4370 /* Add the main thread to the thread list. */
4371 add_thread_silent (inferior_ptid);
4374 /* Next, if the target can specify a description, read it. We do
4375 this before anything involving memory or registers. */
4376 target_find_description ();
4380 /* Use the previously fetched status. */
4381 gdb_assert (wait_status != NULL);
4383 if (target_can_async_p ())
4385 struct stop_reply *stop_reply;
4386 struct cleanup *old_chain;
4388 stop_reply = stop_reply_xmalloc ();
4389 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
4390 remote_parse_stop_reply (wait_status, stop_reply);
4391 discard_cleanups (old_chain);
4392 push_stop_reply (stop_reply);
4394 target_async (inferior_event_handler, 0);
4398 gdb_assert (wait_status != NULL);
4399 strcpy (rs->buf, wait_status);
4400 rs->cached_wait_status = 1;
4404 gdb_assert (wait_status == NULL);
4408 extended_remote_attach (struct target_ops *ops, char *args, int from_tty)
4410 extended_remote_attach_1 (ops, args, from_tty);
4413 /* Convert hex digit A to a number. */
4418 if (a >= '0' && a <= '9')
4420 else if (a >= 'a' && a <= 'f')
4421 return a - 'a' + 10;
4422 else if (a >= 'A' && a <= 'F')
4423 return a - 'A' + 10;
4425 error (_("Reply contains invalid hex digit %d"), a);
4429 hex2bin (const char *hex, gdb_byte *bin, int count)
4433 for (i = 0; i < count; i++)
4435 if (hex[0] == 0 || hex[1] == 0)
4437 /* Hex string is short, or of uneven length.
4438 Return the count that has been converted so far. */
4441 *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]);
4447 /* Convert number NIB to a hex digit. */
4455 return 'a' + nib - 10;
4459 bin2hex (const gdb_byte *bin, char *hex, int count)
4463 /* May use a length, or a nul-terminated string as input. */
4465 count = strlen ((char *) bin);
4467 for (i = 0; i < count; i++)
4469 *hex++ = tohex ((*bin >> 4) & 0xf);
4470 *hex++ = tohex (*bin++ & 0xf);
4476 /* Check for the availability of vCont. This function should also check
4480 remote_vcont_probe (struct remote_state *rs)
4484 strcpy (rs->buf, "vCont?");
4486 getpkt (&rs->buf, &rs->buf_size, 0);
4489 /* Make sure that the features we assume are supported. */
4490 if (strncmp (buf, "vCont", 5) == 0)
4493 int support_s, support_S, support_c, support_C;
4499 rs->support_vCont_t = 0;
4500 while (p && *p == ';')
4503 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
4505 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
4507 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
4509 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
4511 else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0))
4512 rs->support_vCont_t = 1;
4514 p = strchr (p, ';');
4517 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
4518 BUF will make packet_ok disable the packet. */
4519 if (!support_s || !support_S || !support_c || !support_C)
4523 packet_ok (buf, &remote_protocol_packets[PACKET_vCont]);
4526 /* Helper function for building "vCont" resumptions. Write a
4527 resumption to P. ENDP points to one-passed-the-end of the buffer
4528 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
4529 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
4530 resumed thread should be single-stepped and/or signalled. If PTID
4531 equals minus_one_ptid, then all threads are resumed; if PTID
4532 represents a process, then all threads of the process are resumed;
4533 the thread to be stepped and/or signalled is given in the global
4537 append_resumption (char *p, char *endp,
4538 ptid_t ptid, int step, enum target_signal siggnal)
4540 struct remote_state *rs = get_remote_state ();
4542 if (step && siggnal != TARGET_SIGNAL_0)
4543 p += xsnprintf (p, endp - p, ";S%02x", siggnal);
4545 p += xsnprintf (p, endp - p, ";s");
4546 else if (siggnal != TARGET_SIGNAL_0)
4547 p += xsnprintf (p, endp - p, ";C%02x", siggnal);
4549 p += xsnprintf (p, endp - p, ";c");
4551 if (remote_multi_process_p (rs) && ptid_is_pid (ptid))
4555 /* All (-1) threads of process. */
4556 nptid = ptid_build (ptid_get_pid (ptid), 0, -1);
4558 p += xsnprintf (p, endp - p, ":");
4559 p = write_ptid (p, endp, nptid);
4561 else if (!ptid_equal (ptid, minus_one_ptid))
4563 p += xsnprintf (p, endp - p, ":");
4564 p = write_ptid (p, endp, ptid);
4570 /* Resume the remote inferior by using a "vCont" packet. The thread
4571 to be resumed is PTID; STEP and SIGGNAL indicate whether the
4572 resumed thread should be single-stepped and/or signalled. If PTID
4573 equals minus_one_ptid, then all threads are resumed; the thread to
4574 be stepped and/or signalled is given in the global INFERIOR_PTID.
4575 This function returns non-zero iff it resumes the inferior.
4577 This function issues a strict subset of all possible vCont commands at the
4581 remote_vcont_resume (ptid_t ptid, int step, enum target_signal siggnal)
4583 struct remote_state *rs = get_remote_state ();
4587 if (remote_protocol_packets[PACKET_vCont].support == PACKET_SUPPORT_UNKNOWN)
4588 remote_vcont_probe (rs);
4590 if (remote_protocol_packets[PACKET_vCont].support == PACKET_DISABLE)
4594 endp = rs->buf + get_remote_packet_size ();
4596 /* If we could generate a wider range of packets, we'd have to worry
4597 about overflowing BUF. Should there be a generic
4598 "multi-part-packet" packet? */
4600 p += xsnprintf (p, endp - p, "vCont");
4602 if (ptid_equal (ptid, magic_null_ptid))
4604 /* MAGIC_NULL_PTID means that we don't have any active threads,
4605 so we don't have any TID numbers the inferior will
4606 understand. Make sure to only send forms that do not specify
4608 append_resumption (p, endp, minus_one_ptid, step, siggnal);
4610 else if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid))
4612 /* Resume all threads (of all processes, or of a single
4613 process), with preference for INFERIOR_PTID. This assumes
4614 inferior_ptid belongs to the set of all threads we are about
4616 if (step || siggnal != TARGET_SIGNAL_0)
4618 /* Step inferior_ptid, with or without signal. */
4619 p = append_resumption (p, endp, inferior_ptid, step, siggnal);
4622 /* And continue others without a signal. */
4623 append_resumption (p, endp, ptid, /*step=*/ 0, TARGET_SIGNAL_0);
4627 /* Scheduler locking; resume only PTID. */
4628 append_resumption (p, endp, ptid, step, siggnal);
4631 gdb_assert (strlen (rs->buf) < get_remote_packet_size ());
4636 /* In non-stop, the stub replies to vCont with "OK". The stop
4637 reply will be reported asynchronously by means of a `%Stop'
4639 getpkt (&rs->buf, &rs->buf_size, 0);
4640 if (strcmp (rs->buf, "OK") != 0)
4641 error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf);
4647 /* Tell the remote machine to resume. */
4649 static enum target_signal last_sent_signal = TARGET_SIGNAL_0;
4651 static int last_sent_step;
4654 remote_resume (struct target_ops *ops,
4655 ptid_t ptid, int step, enum target_signal siggnal)
4657 struct remote_state *rs = get_remote_state ();
4660 last_sent_signal = siggnal;
4661 last_sent_step = step;
4663 /* The vCont packet doesn't need to specify threads via Hc. */
4664 /* No reverse support (yet) for vCont. */
4665 if (execution_direction != EXEC_REVERSE)
4666 if (remote_vcont_resume (ptid, step, siggnal))
4669 /* All other supported resume packets do use Hc, so set the continue
4671 if (ptid_equal (ptid, minus_one_ptid))
4672 set_continue_thread (any_thread_ptid);
4674 set_continue_thread (ptid);
4677 if (execution_direction == EXEC_REVERSE)
4679 /* We don't pass signals to the target in reverse exec mode. */
4680 if (info_verbose && siggnal != TARGET_SIGNAL_0)
4681 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
4685 && remote_protocol_packets[PACKET_bs].support == PACKET_DISABLE)
4686 error (_("Remote reverse-step not supported."));
4688 && remote_protocol_packets[PACKET_bc].support == PACKET_DISABLE)
4689 error (_("Remote reverse-continue not supported."));
4691 strcpy (buf, step ? "bs" : "bc");
4693 else if (siggnal != TARGET_SIGNAL_0)
4695 buf[0] = step ? 'S' : 'C';
4696 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
4697 buf[2] = tohex (((int) siggnal) & 0xf);
4701 strcpy (buf, step ? "s" : "c");
4706 /* We are about to start executing the inferior, let's register it
4707 with the event loop. NOTE: this is the one place where all the
4708 execution commands end up. We could alternatively do this in each
4709 of the execution commands in infcmd.c. */
4710 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
4711 into infcmd.c in order to allow inferior function calls to work
4712 NOT asynchronously. */
4713 if (target_can_async_p ())
4714 target_async (inferior_event_handler, 0);
4716 /* We've just told the target to resume. The remote server will
4717 wait for the inferior to stop, and then send a stop reply. In
4718 the mean time, we can't start another command/query ourselves
4719 because the stub wouldn't be ready to process it. This applies
4720 only to the base all-stop protocol, however. In non-stop (which
4721 only supports vCont), the stub replies with an "OK", and is
4722 immediate able to process further serial input. */
4724 rs->waiting_for_stop_reply = 1;
4728 /* Set up the signal handler for SIGINT, while the target is
4729 executing, ovewriting the 'regular' SIGINT signal handler. */
4731 initialize_sigint_signal_handler (void)
4733 signal (SIGINT, handle_remote_sigint);
4736 /* Signal handler for SIGINT, while the target is executing. */
4738 handle_remote_sigint (int sig)
4740 signal (sig, handle_remote_sigint_twice);
4741 mark_async_signal_handler_wrapper (sigint_remote_token);
4744 /* Signal handler for SIGINT, installed after SIGINT has already been
4745 sent once. It will take effect the second time that the user sends
4748 handle_remote_sigint_twice (int sig)
4750 signal (sig, handle_remote_sigint);
4751 mark_async_signal_handler_wrapper (sigint_remote_twice_token);
4754 /* Perform the real interruption of the target execution, in response
4757 async_remote_interrupt (gdb_client_data arg)
4760 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
4762 target_stop (inferior_ptid);
4765 /* Perform interrupt, if the first attempt did not succeed. Just give
4766 up on the target alltogether. */
4768 async_remote_interrupt_twice (gdb_client_data arg)
4771 fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n");
4776 /* Reinstall the usual SIGINT handlers, after the target has
4779 cleanup_sigint_signal_handler (void *dummy)
4781 signal (SIGINT, handle_sigint);
4784 /* Send ^C to target to halt it. Target will respond, and send us a
4786 static void (*ofunc) (int);
4788 /* The command line interface's stop routine. This function is installed
4789 as a signal handler for SIGINT. The first time a user requests a
4790 stop, we call remote_stop to send a break or ^C. If there is no
4791 response from the target (it didn't stop when the user requested it),
4792 we ask the user if he'd like to detach from the target. */
4794 remote_interrupt (int signo)
4796 /* If this doesn't work, try more severe steps. */
4797 signal (signo, remote_interrupt_twice);
4799 gdb_call_async_signal_handler (sigint_remote_token, 1);
4802 /* The user typed ^C twice. */
4805 remote_interrupt_twice (int signo)
4807 signal (signo, ofunc);
4808 gdb_call_async_signal_handler (sigint_remote_twice_token, 1);
4809 signal (signo, remote_interrupt);
4812 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
4813 thread, all threads of a remote process, or all threads of all
4817 remote_stop_ns (ptid_t ptid)
4819 struct remote_state *rs = get_remote_state ();
4821 char *endp = rs->buf + get_remote_packet_size ();
4823 if (remote_protocol_packets[PACKET_vCont].support == PACKET_SUPPORT_UNKNOWN)
4824 remote_vcont_probe (rs);
4826 if (!rs->support_vCont_t)
4827 error (_("Remote server does not support stopping threads"));
4829 if (ptid_equal (ptid, minus_one_ptid)
4830 || (!remote_multi_process_p (rs) && ptid_is_pid (ptid)))
4831 p += xsnprintf (p, endp - p, "vCont;t");
4836 p += xsnprintf (p, endp - p, "vCont;t:");
4838 if (ptid_is_pid (ptid))
4839 /* All (-1) threads of process. */
4840 nptid = ptid_build (ptid_get_pid (ptid), 0, -1);
4843 /* Small optimization: if we already have a stop reply for
4844 this thread, no use in telling the stub we want this
4846 if (peek_stop_reply (ptid))
4852 write_ptid (p, endp, nptid);
4855 /* In non-stop, we get an immediate OK reply. The stop reply will
4856 come in asynchronously by notification. */
4858 getpkt (&rs->buf, &rs->buf_size, 0);
4859 if (strcmp (rs->buf, "OK") != 0)
4860 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid), rs->buf);
4863 /* All-stop version of target_stop. Sends a break or a ^C to stop the
4864 remote target. It is undefined which thread of which process
4865 reports the stop. */
4868 remote_stop_as (ptid_t ptid)
4870 struct remote_state *rs = get_remote_state ();
4872 rs->ctrlc_pending_p = 1;
4874 /* If the inferior is stopped already, but the core didn't know
4875 about it yet, just ignore the request. The cached wait status
4876 will be collected in remote_wait. */
4877 if (rs->cached_wait_status)
4880 /* Send interrupt_sequence to remote target. */
4881 send_interrupt_sequence ();
4884 /* This is the generic stop called via the target vector. When a target
4885 interrupt is requested, either by the command line or the GUI, we
4886 will eventually end up here. */
4889 remote_stop (ptid_t ptid)
4892 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
4895 remote_stop_ns (ptid);
4897 remote_stop_as (ptid);
4900 /* Ask the user what to do when an interrupt is received. */
4903 interrupt_query (void)
4905 target_terminal_ours ();
4907 if (target_can_async_p ())
4909 signal (SIGINT, handle_sigint);
4910 deprecated_throw_reason (RETURN_QUIT);
4914 if (query (_("Interrupted while waiting for the program.\n\
4915 Give up (and stop debugging it)? ")))
4918 deprecated_throw_reason (RETURN_QUIT);
4922 target_terminal_inferior ();
4925 /* Enable/disable target terminal ownership. Most targets can use
4926 terminal groups to control terminal ownership. Remote targets are
4927 different in that explicit transfer of ownership to/from GDB/target
4931 remote_terminal_inferior (void)
4933 if (!target_async_permitted)
4934 /* Nothing to do. */
4937 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
4938 idempotent. The event-loop GDB talking to an asynchronous target
4939 with a synchronous command calls this function from both
4940 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
4941 transfer the terminal to the target when it shouldn't this guard
4943 if (!remote_async_terminal_ours_p)
4945 delete_file_handler (input_fd);
4946 remote_async_terminal_ours_p = 0;
4947 initialize_sigint_signal_handler ();
4948 /* NOTE: At this point we could also register our selves as the
4949 recipient of all input. Any characters typed could then be
4950 passed on down to the target. */
4954 remote_terminal_ours (void)
4956 if (!target_async_permitted)
4957 /* Nothing to do. */
4960 /* See FIXME in remote_terminal_inferior. */
4961 if (remote_async_terminal_ours_p)
4963 cleanup_sigint_signal_handler (NULL);
4964 add_file_handler (input_fd, stdin_event_handler, 0);
4965 remote_async_terminal_ours_p = 1;
4969 remote_console_output (char *msg)
4973 for (p = msg; p[0] && p[1]; p += 2)
4976 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
4980 fputs_unfiltered (tb, gdb_stdtarg);
4982 gdb_flush (gdb_stdtarg);
4985 typedef struct cached_reg
4988 gdb_byte data[MAX_REGISTER_SIZE];
4991 DEF_VEC_O(cached_reg_t);
4995 struct stop_reply *next;
4999 struct target_waitstatus ws;
5001 /* Expedited registers. This makes remote debugging a bit more
5002 efficient for those targets that provide critical registers as
5003 part of their normal status mechanism (as another roundtrip to
5004 fetch them is avoided). */
5005 VEC(cached_reg_t) *regcache;
5007 int stopped_by_watchpoint_p;
5008 CORE_ADDR watch_data_address;
5016 /* The list of already fetched and acknowledged stop events. */
5017 static struct stop_reply *stop_reply_queue;
5019 static struct stop_reply *
5020 stop_reply_xmalloc (void)
5022 struct stop_reply *r = XMALLOC (struct stop_reply);
5029 stop_reply_xfree (struct stop_reply *r)
5033 VEC_free (cached_reg_t, r->regcache);
5038 /* Discard all pending stop replies of inferior PID. If PID is -1,
5039 discard everything. */
5042 discard_pending_stop_replies (int pid)
5044 struct stop_reply *prev = NULL, *reply, *next;
5046 /* Discard the in-flight notification. */
5047 if (pending_stop_reply != NULL
5049 || ptid_get_pid (pending_stop_reply->ptid) == pid))
5051 stop_reply_xfree (pending_stop_reply);
5052 pending_stop_reply = NULL;
5055 /* Discard the stop replies we have already pulled with
5057 for (reply = stop_reply_queue; reply; reply = next)
5061 || ptid_get_pid (reply->ptid) == pid)
5063 if (reply == stop_reply_queue)
5064 stop_reply_queue = reply->next;
5066 prev->next = reply->next;
5068 stop_reply_xfree (reply);
5075 /* Cleanup wrapper. */
5078 do_stop_reply_xfree (void *arg)
5080 struct stop_reply *r = arg;
5082 stop_reply_xfree (r);
5085 /* Look for a queued stop reply belonging to PTID. If one is found,
5086 remove it from the queue, and return it. Returns NULL if none is
5087 found. If there are still queued events left to process, tell the
5088 event loop to get back to target_wait soon. */
5090 static struct stop_reply *
5091 queued_stop_reply (ptid_t ptid)
5093 struct stop_reply *it;
5094 struct stop_reply **it_link;
5096 it = stop_reply_queue;
5097 it_link = &stop_reply_queue;
5100 if (ptid_match (it->ptid, ptid))
5102 *it_link = it->next;
5107 it_link = &it->next;
5111 if (stop_reply_queue)
5112 /* There's still at least an event left. */
5113 mark_async_event_handler (remote_async_inferior_event_token);
5118 /* Push a fully parsed stop reply in the stop reply queue. Since we
5119 know that we now have at least one queued event left to pass to the
5120 core side, tell the event loop to get back to target_wait soon. */
5123 push_stop_reply (struct stop_reply *new_event)
5125 struct stop_reply *event;
5127 if (stop_reply_queue)
5129 for (event = stop_reply_queue;
5130 event && event->next;
5131 event = event->next)
5134 event->next = new_event;
5137 stop_reply_queue = new_event;
5139 mark_async_event_handler (remote_async_inferior_event_token);
5142 /* Returns true if we have a stop reply for PTID. */
5145 peek_stop_reply (ptid_t ptid)
5147 struct stop_reply *it;
5149 for (it = stop_reply_queue; it; it = it->next)
5150 if (ptid_equal (ptid, it->ptid))
5152 if (it->ws.kind == TARGET_WAITKIND_STOPPED)
5159 /* Parse the stop reply in BUF. Either the function succeeds, and the
5160 result is stored in EVENT, or throws an error. */
5163 remote_parse_stop_reply (char *buf, struct stop_reply *event)
5165 struct remote_arch_state *rsa = get_remote_arch_state ();
5169 event->ptid = null_ptid;
5170 event->ws.kind = TARGET_WAITKIND_IGNORE;
5171 event->ws.value.integer = 0;
5172 event->solibs_changed = 0;
5173 event->replay_event = 0;
5174 event->stopped_by_watchpoint_p = 0;
5175 event->regcache = NULL;
5180 case 'T': /* Status with PC, SP, FP, ... */
5181 /* Expedited reply, containing Signal, {regno, reg} repeat. */
5182 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
5184 n... = register number
5185 r... = register contents
5188 p = &buf[3]; /* after Txx */
5196 /* If the packet contains a register number, save it in
5197 pnum and set p1 to point to the character following it.
5198 Otherwise p1 points to p. */
5200 /* If this packet is an awatch packet, don't parse the 'a'
5201 as a register number. */
5203 if (strncmp (p, "awatch", strlen("awatch")) != 0
5204 && strncmp (p, "core", strlen ("core") != 0))
5206 /* Read the ``P'' register number. */
5207 pnum = strtol (p, &p_temp, 16);
5213 if (p1 == p) /* No register number present here. */
5215 p1 = strchr (p, ':');
5217 error (_("Malformed packet(a) (missing colon): %s\n\
5220 if (strncmp (p, "thread", p1 - p) == 0)
5221 event->ptid = read_ptid (++p1, &p);
5222 else if ((strncmp (p, "watch", p1 - p) == 0)
5223 || (strncmp (p, "rwatch", p1 - p) == 0)
5224 || (strncmp (p, "awatch", p1 - p) == 0))
5226 event->stopped_by_watchpoint_p = 1;
5227 p = unpack_varlen_hex (++p1, &addr);
5228 event->watch_data_address = (CORE_ADDR) addr;
5230 else if (strncmp (p, "library", p1 - p) == 0)
5234 while (*p_temp && *p_temp != ';')
5237 event->solibs_changed = 1;
5240 else if (strncmp (p, "replaylog", p1 - p) == 0)
5242 /* NO_HISTORY event.
5243 p1 will indicate "begin" or "end", but
5244 it makes no difference for now, so ignore it. */
5245 event->replay_event = 1;
5246 p_temp = strchr (p1 + 1, ';');
5250 else if (strncmp (p, "core", p1 - p) == 0)
5254 p = unpack_varlen_hex (++p1, &c);
5259 /* Silently skip unknown optional info. */
5260 p_temp = strchr (p1 + 1, ';');
5267 struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum);
5268 cached_reg_t cached_reg;
5273 error (_("Malformed packet(b) (missing colon): %s\n\
5279 error (_("Remote sent bad register number %s: %s\n\
5281 hex_string (pnum), p, buf);
5283 cached_reg.num = reg->regnum;
5285 fieldsize = hex2bin (p, cached_reg.data,
5286 register_size (target_gdbarch,
5289 if (fieldsize < register_size (target_gdbarch,
5291 warning (_("Remote reply is too short: %s"), buf);
5293 VEC_safe_push (cached_reg_t, event->regcache, &cached_reg);
5297 error (_("Remote register badly formatted: %s\nhere: %s"),
5302 case 'S': /* Old style status, just signal only. */
5303 if (event->solibs_changed)
5304 event->ws.kind = TARGET_WAITKIND_LOADED;
5305 else if (event->replay_event)
5306 event->ws.kind = TARGET_WAITKIND_NO_HISTORY;
5309 event->ws.kind = TARGET_WAITKIND_STOPPED;
5310 event->ws.value.sig = (enum target_signal)
5311 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
5314 case 'W': /* Target exited. */
5321 /* GDB used to accept only 2 hex chars here. Stubs should
5322 only send more if they detect GDB supports multi-process
5324 p = unpack_varlen_hex (&buf[1], &value);
5328 /* The remote process exited. */
5329 event->ws.kind = TARGET_WAITKIND_EXITED;
5330 event->ws.value.integer = value;
5334 /* The remote process exited with a signal. */
5335 event->ws.kind = TARGET_WAITKIND_SIGNALLED;
5336 event->ws.value.sig = (enum target_signal) value;
5339 /* If no process is specified, assume inferior_ptid. */
5340 pid = ptid_get_pid (inferior_ptid);
5349 else if (strncmp (p,
5350 "process:", sizeof ("process:") - 1) == 0)
5354 p += sizeof ("process:") - 1;
5355 unpack_varlen_hex (p, &upid);
5359 error (_("unknown stop reply packet: %s"), buf);
5362 error (_("unknown stop reply packet: %s"), buf);
5363 event->ptid = pid_to_ptid (pid);
5368 if (non_stop && ptid_equal (event->ptid, null_ptid))
5369 error (_("No process or thread specified in stop reply: %s"), buf);
5372 /* When the stub wants to tell GDB about a new stop reply, it sends a
5373 stop notification (%Stop). Those can come it at any time, hence,
5374 we have to make sure that any pending putpkt/getpkt sequence we're
5375 making is finished, before querying the stub for more events with
5376 vStopped. E.g., if we started a vStopped sequence immediatelly
5377 upon receiving the %Stop notification, something like this could
5385 1.6) <-- (registers reply to step #1.3)
5387 Obviously, the reply in step #1.6 would be unexpected to a vStopped
5390 To solve this, whenever we parse a %Stop notification sucessfully,
5391 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
5392 doing whatever we were doing:
5398 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
5399 2.5) <-- (registers reply to step #2.3)
5401 Eventualy after step #2.5, we return to the event loop, which
5402 notices there's an event on the
5403 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
5404 associated callback --- the function below. At this point, we're
5405 always safe to start a vStopped sequence. :
5408 2.7) <-- T05 thread:2
5414 remote_get_pending_stop_replies (void)
5416 struct remote_state *rs = get_remote_state ();
5418 if (pending_stop_reply)
5421 putpkt ("vStopped");
5423 /* Now we can rely on it. */
5424 push_stop_reply (pending_stop_reply);
5425 pending_stop_reply = NULL;
5429 getpkt (&rs->buf, &rs->buf_size, 0);
5430 if (strcmp (rs->buf, "OK") == 0)
5434 struct cleanup *old_chain;
5435 struct stop_reply *stop_reply = stop_reply_xmalloc ();
5437 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
5438 remote_parse_stop_reply (rs->buf, stop_reply);
5441 putpkt ("vStopped");
5443 if (stop_reply->ws.kind != TARGET_WAITKIND_IGNORE)
5445 /* Now we can rely on it. */
5446 discard_cleanups (old_chain);
5447 push_stop_reply (stop_reply);
5450 /* We got an unknown stop reply. */
5451 do_cleanups (old_chain);
5458 /* Called when it is decided that STOP_REPLY holds the info of the
5459 event that is to be returned to the core. This function always
5460 destroys STOP_REPLY. */
5463 process_stop_reply (struct stop_reply *stop_reply,
5464 struct target_waitstatus *status)
5468 *status = stop_reply->ws;
5469 ptid = stop_reply->ptid;
5471 /* If no thread/process was reported by the stub, assume the current
5473 if (ptid_equal (ptid, null_ptid))
5474 ptid = inferior_ptid;
5476 if (status->kind != TARGET_WAITKIND_EXITED
5477 && status->kind != TARGET_WAITKIND_SIGNALLED)
5479 /* Expedited registers. */
5480 if (stop_reply->regcache)
5482 struct regcache *regcache
5483 = get_thread_arch_regcache (ptid, target_gdbarch);
5488 VEC_iterate(cached_reg_t, stop_reply->regcache, ix, reg);
5490 regcache_raw_supply (regcache, reg->num, reg->data);
5491 VEC_free (cached_reg_t, stop_reply->regcache);
5494 remote_stopped_by_watchpoint_p = stop_reply->stopped_by_watchpoint_p;
5495 remote_watch_data_address = stop_reply->watch_data_address;
5497 remote_notice_new_inferior (ptid, 0);
5498 demand_private_info (ptid)->core = stop_reply->core;
5501 stop_reply_xfree (stop_reply);
5505 /* The non-stop mode version of target_wait. */
5508 remote_wait_ns (ptid_t ptid, struct target_waitstatus *status, int options)
5510 struct remote_state *rs = get_remote_state ();
5511 struct stop_reply *stop_reply;
5514 /* If in non-stop mode, get out of getpkt even if a
5515 notification is received. */
5517 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
5524 case 'E': /* Error of some sort. */
5525 /* We're out of sync with the target now. Did it continue
5526 or not? We can't tell which thread it was in non-stop,
5527 so just ignore this. */
5528 warning (_("Remote failure reply: %s"), rs->buf);
5530 case 'O': /* Console output. */
5531 remote_console_output (rs->buf + 1);
5534 warning (_("Invalid remote reply: %s"), rs->buf);
5538 /* Acknowledge a pending stop reply that may have arrived in the
5540 if (pending_stop_reply != NULL)
5541 remote_get_pending_stop_replies ();
5543 /* If indeed we noticed a stop reply, we're done. */
5544 stop_reply = queued_stop_reply (ptid);
5545 if (stop_reply != NULL)
5546 return process_stop_reply (stop_reply, status);
5548 /* Still no event. If we're just polling for an event, then
5549 return to the event loop. */
5550 if (options & TARGET_WNOHANG)
5552 status->kind = TARGET_WAITKIND_IGNORE;
5553 return minus_one_ptid;
5556 /* Otherwise do a blocking wait. */
5557 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
5562 /* Wait until the remote machine stops, then return, storing status in
5563 STATUS just as `wait' would. */
5566 remote_wait_as (ptid_t ptid, struct target_waitstatus *status, int options)
5568 struct remote_state *rs = get_remote_state ();
5569 ptid_t event_ptid = null_ptid;
5571 struct stop_reply *stop_reply;
5575 status->kind = TARGET_WAITKIND_IGNORE;
5576 status->value.integer = 0;
5578 stop_reply = queued_stop_reply (ptid);
5579 if (stop_reply != NULL)
5580 return process_stop_reply (stop_reply, status);
5582 if (rs->cached_wait_status)
5583 /* Use the cached wait status, but only once. */
5584 rs->cached_wait_status = 0;
5589 if (!target_is_async_p ())
5591 ofunc = signal (SIGINT, remote_interrupt);
5592 /* If the user hit C-c before this packet, or between packets,
5593 pretend that it was hit right here. */
5597 remote_interrupt (SIGINT);
5601 /* FIXME: cagney/1999-09-27: If we're in async mode we should
5602 _never_ wait for ever -> test on target_is_async_p().
5603 However, before we do that we need to ensure that the caller
5604 knows how to take the target into/out of async mode. */
5605 ret = getpkt_sane (&rs->buf, &rs->buf_size, wait_forever_enabled_p);
5606 if (!target_is_async_p ())
5607 signal (SIGINT, ofunc);
5612 remote_stopped_by_watchpoint_p = 0;
5614 /* We got something. */
5615 rs->waiting_for_stop_reply = 0;
5617 /* Assume that the target has acknowledged Ctrl-C unless we receive
5618 an 'F' or 'O' packet. */
5619 if (buf[0] != 'F' && buf[0] != 'O')
5620 rs->ctrlc_pending_p = 0;
5624 case 'E': /* Error of some sort. */
5625 /* We're out of sync with the target now. Did it continue or
5626 not? Not is more likely, so report a stop. */
5627 warning (_("Remote failure reply: %s"), buf);
5628 status->kind = TARGET_WAITKIND_STOPPED;
5629 status->value.sig = TARGET_SIGNAL_0;
5631 case 'F': /* File-I/O request. */
5632 remote_fileio_request (buf, rs->ctrlc_pending_p);
5633 rs->ctrlc_pending_p = 0;
5635 case 'T': case 'S': case 'X': case 'W':
5637 struct stop_reply *stop_reply;
5638 struct cleanup *old_chain;
5640 stop_reply = stop_reply_xmalloc ();
5641 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
5642 remote_parse_stop_reply (buf, stop_reply);
5643 discard_cleanups (old_chain);
5644 event_ptid = process_stop_reply (stop_reply, status);
5647 case 'O': /* Console output. */
5648 remote_console_output (buf + 1);
5650 /* The target didn't really stop; keep waiting. */
5651 rs->waiting_for_stop_reply = 1;
5655 if (last_sent_signal != TARGET_SIGNAL_0)
5657 /* Zero length reply means that we tried 'S' or 'C' and the
5658 remote system doesn't support it. */
5659 target_terminal_ours_for_output ();
5661 ("Can't send signals to this remote system. %s not sent.\n",
5662 target_signal_to_name (last_sent_signal));
5663 last_sent_signal = TARGET_SIGNAL_0;
5664 target_terminal_inferior ();
5666 strcpy ((char *) buf, last_sent_step ? "s" : "c");
5667 putpkt ((char *) buf);
5669 /* We just told the target to resume, so a stop reply is in
5671 rs->waiting_for_stop_reply = 1;
5674 /* else fallthrough */
5676 warning (_("Invalid remote reply: %s"), buf);
5678 rs->waiting_for_stop_reply = 1;
5682 if (status->kind == TARGET_WAITKIND_IGNORE)
5684 /* Nothing interesting happened. If we're doing a non-blocking
5685 poll, we're done. Otherwise, go back to waiting. */
5686 if (options & TARGET_WNOHANG)
5687 return minus_one_ptid;
5691 else if (status->kind != TARGET_WAITKIND_EXITED
5692 && status->kind != TARGET_WAITKIND_SIGNALLED)
5694 if (!ptid_equal (event_ptid, null_ptid))
5695 record_currthread (event_ptid);
5697 event_ptid = inferior_ptid;
5700 /* A process exit. Invalidate our notion of current thread. */
5701 record_currthread (minus_one_ptid);
5706 /* Wait until the remote machine stops, then return, storing status in
5707 STATUS just as `wait' would. */
5710 remote_wait (struct target_ops *ops,
5711 ptid_t ptid, struct target_waitstatus *status, int options)
5716 event_ptid = remote_wait_ns (ptid, status, options);
5718 event_ptid = remote_wait_as (ptid, status, options);
5720 if (target_can_async_p ())
5722 /* If there are are events left in the queue tell the event loop
5724 if (stop_reply_queue)
5725 mark_async_event_handler (remote_async_inferior_event_token);
5731 /* Fetch a single register using a 'p' packet. */
5734 fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg)
5736 struct remote_state *rs = get_remote_state ();
5738 char regp[MAX_REGISTER_SIZE];
5741 if (remote_protocol_packets[PACKET_p].support == PACKET_DISABLE)
5744 if (reg->pnum == -1)
5749 p += hexnumstr (p, reg->pnum);
5752 getpkt (&rs->buf, &rs->buf_size, 0);
5756 switch (packet_ok (buf, &remote_protocol_packets[PACKET_p]))
5760 case PACKET_UNKNOWN:
5763 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
5764 gdbarch_register_name (get_regcache_arch (regcache),
5769 /* If this register is unfetchable, tell the regcache. */
5772 regcache_raw_supply (regcache, reg->regnum, NULL);
5776 /* Otherwise, parse and supply the value. */
5782 error (_("fetch_register_using_p: early buf termination"));
5784 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
5787 regcache_raw_supply (regcache, reg->regnum, regp);
5791 /* Fetch the registers included in the target's 'g' packet. */
5794 send_g_packet (void)
5796 struct remote_state *rs = get_remote_state ();
5799 sprintf (rs->buf, "g");
5800 remote_send (&rs->buf, &rs->buf_size);
5802 /* We can get out of synch in various cases. If the first character
5803 in the buffer is not a hex character, assume that has happened
5804 and try to fetch another packet to read. */
5805 while ((rs->buf[0] < '0' || rs->buf[0] > '9')
5806 && (rs->buf[0] < 'A' || rs->buf[0] > 'F')
5807 && (rs->buf[0] < 'a' || rs->buf[0] > 'f')
5808 && rs->buf[0] != 'x') /* New: unavailable register value. */
5811 fprintf_unfiltered (gdb_stdlog,
5812 "Bad register packet; fetching a new packet\n");
5813 getpkt (&rs->buf, &rs->buf_size, 0);
5816 buf_len = strlen (rs->buf);
5818 /* Sanity check the received packet. */
5819 if (buf_len % 2 != 0)
5820 error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf);
5826 process_g_packet (struct regcache *regcache)
5828 struct gdbarch *gdbarch = get_regcache_arch (regcache);
5829 struct remote_state *rs = get_remote_state ();
5830 struct remote_arch_state *rsa = get_remote_arch_state ();
5835 buf_len = strlen (rs->buf);
5837 /* Further sanity checks, with knowledge of the architecture. */
5838 if (buf_len > 2 * rsa->sizeof_g_packet)
5839 error (_("Remote 'g' packet reply is too long: %s"), rs->buf);
5841 /* Save the size of the packet sent to us by the target. It is used
5842 as a heuristic when determining the max size of packets that the
5843 target can safely receive. */
5844 if (rsa->actual_register_packet_size == 0)
5845 rsa->actual_register_packet_size = buf_len;
5847 /* If this is smaller than we guessed the 'g' packet would be,
5848 update our records. A 'g' reply that doesn't include a register's
5849 value implies either that the register is not available, or that
5850 the 'p' packet must be used. */
5851 if (buf_len < 2 * rsa->sizeof_g_packet)
5853 rsa->sizeof_g_packet = buf_len / 2;
5855 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
5857 if (rsa->regs[i].pnum == -1)
5860 if (rsa->regs[i].offset >= rsa->sizeof_g_packet)
5861 rsa->regs[i].in_g_packet = 0;
5863 rsa->regs[i].in_g_packet = 1;
5867 regs = alloca (rsa->sizeof_g_packet);
5869 /* Unimplemented registers read as all bits zero. */
5870 memset (regs, 0, rsa->sizeof_g_packet);
5872 /* Reply describes registers byte by byte, each byte encoded as two
5873 hex characters. Suck them all up, then supply them to the
5874 register cacheing/storage mechanism. */
5877 for (i = 0; i < rsa->sizeof_g_packet; i++)
5879 if (p[0] == 0 || p[1] == 0)
5880 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
5881 internal_error (__FILE__, __LINE__,
5882 _("unexpected end of 'g' packet reply"));
5884 if (p[0] == 'x' && p[1] == 'x')
5885 regs[i] = 0; /* 'x' */
5887 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
5891 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
5893 struct packet_reg *r = &rsa->regs[i];
5897 if (r->offset * 2 >= strlen (rs->buf))
5898 /* This shouldn't happen - we adjusted in_g_packet above. */
5899 internal_error (__FILE__, __LINE__,
5900 _("unexpected end of 'g' packet reply"));
5901 else if (rs->buf[r->offset * 2] == 'x')
5903 gdb_assert (r->offset * 2 < strlen (rs->buf));
5904 /* The register isn't available, mark it as such (at
5905 the same time setting the value to zero). */
5906 regcache_raw_supply (regcache, r->regnum, NULL);
5909 regcache_raw_supply (regcache, r->regnum,
5916 fetch_registers_using_g (struct regcache *regcache)
5919 process_g_packet (regcache);
5922 /* Make the remote selected traceframe match GDB's selected
5926 set_remote_traceframe (void)
5930 if (remote_traceframe_number == get_traceframe_number ())
5933 /* Avoid recursion, remote_trace_find calls us again. */
5934 remote_traceframe_number = get_traceframe_number ();
5936 newnum = target_trace_find (tfind_number,
5937 get_traceframe_number (), 0, 0, NULL);
5939 /* Should not happen. If it does, all bets are off. */
5940 if (newnum != get_traceframe_number ())
5941 warning (_("could not set remote traceframe"));
5945 remote_fetch_registers (struct target_ops *ops,
5946 struct regcache *regcache, int regnum)
5948 struct remote_arch_state *rsa = get_remote_arch_state ();
5951 set_remote_traceframe ();
5952 set_general_thread (inferior_ptid);
5956 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
5958 gdb_assert (reg != NULL);
5960 /* If this register might be in the 'g' packet, try that first -
5961 we are likely to read more than one register. If this is the
5962 first 'g' packet, we might be overly optimistic about its
5963 contents, so fall back to 'p'. */
5964 if (reg->in_g_packet)
5966 fetch_registers_using_g (regcache);
5967 if (reg->in_g_packet)
5971 if (fetch_register_using_p (regcache, reg))
5974 /* This register is not available. */
5975 regcache_raw_supply (regcache, reg->regnum, NULL);
5980 fetch_registers_using_g (regcache);
5982 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
5983 if (!rsa->regs[i].in_g_packet)
5984 if (!fetch_register_using_p (regcache, &rsa->regs[i]))
5986 /* This register is not available. */
5987 regcache_raw_supply (regcache, i, NULL);
5991 /* Prepare to store registers. Since we may send them all (using a
5992 'G' request), we have to read out the ones we don't want to change
5996 remote_prepare_to_store (struct regcache *regcache)
5998 struct remote_arch_state *rsa = get_remote_arch_state ();
6000 gdb_byte buf[MAX_REGISTER_SIZE];
6002 /* Make sure the entire registers array is valid. */
6003 switch (remote_protocol_packets[PACKET_P].support)
6005 case PACKET_DISABLE:
6006 case PACKET_SUPPORT_UNKNOWN:
6007 /* Make sure all the necessary registers are cached. */
6008 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
6009 if (rsa->regs[i].in_g_packet)
6010 regcache_raw_read (regcache, rsa->regs[i].regnum, buf);
6017 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
6018 packet was not recognized. */
6021 store_register_using_P (const struct regcache *regcache,
6022 struct packet_reg *reg)
6024 struct gdbarch *gdbarch = get_regcache_arch (regcache);
6025 struct remote_state *rs = get_remote_state ();
6026 /* Try storing a single register. */
6027 char *buf = rs->buf;
6028 gdb_byte regp[MAX_REGISTER_SIZE];
6031 if (remote_protocol_packets[PACKET_P].support == PACKET_DISABLE)
6034 if (reg->pnum == -1)
6037 xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0));
6038 p = buf + strlen (buf);
6039 regcache_raw_collect (regcache, reg->regnum, regp);
6040 bin2hex (regp, p, register_size (gdbarch, reg->regnum));
6042 getpkt (&rs->buf, &rs->buf_size, 0);
6044 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P]))
6049 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
6050 gdbarch_register_name (gdbarch, reg->regnum), rs->buf);
6051 case PACKET_UNKNOWN:
6054 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
6058 /* Store register REGNUM, or all registers if REGNUM == -1, from the
6059 contents of the register cache buffer. FIXME: ignores errors. */
6062 store_registers_using_G (const struct regcache *regcache)
6064 struct remote_state *rs = get_remote_state ();
6065 struct remote_arch_state *rsa = get_remote_arch_state ();
6069 /* Extract all the registers in the regcache copying them into a
6074 regs = alloca (rsa->sizeof_g_packet);
6075 memset (regs, 0, rsa->sizeof_g_packet);
6076 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
6078 struct packet_reg *r = &rsa->regs[i];
6081 regcache_raw_collect (regcache, r->regnum, regs + r->offset);
6085 /* Command describes registers byte by byte,
6086 each byte encoded as two hex characters. */
6089 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
6091 bin2hex (regs, p, rsa->sizeof_g_packet);
6093 getpkt (&rs->buf, &rs->buf_size, 0);
6094 if (packet_check_result (rs->buf) == PACKET_ERROR)
6095 error (_("Could not write registers; remote failure reply '%s'"),
6099 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
6100 of the register cache buffer. FIXME: ignores errors. */
6103 remote_store_registers (struct target_ops *ops,
6104 struct regcache *regcache, int regnum)
6106 struct remote_arch_state *rsa = get_remote_arch_state ();
6109 set_remote_traceframe ();
6110 set_general_thread (inferior_ptid);
6114 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
6116 gdb_assert (reg != NULL);
6118 /* Always prefer to store registers using the 'P' packet if
6119 possible; we often change only a small number of registers.
6120 Sometimes we change a larger number; we'd need help from a
6121 higher layer to know to use 'G'. */
6122 if (store_register_using_P (regcache, reg))
6125 /* For now, don't complain if we have no way to write the
6126 register. GDB loses track of unavailable registers too
6127 easily. Some day, this may be an error. We don't have
6128 any way to read the register, either... */
6129 if (!reg->in_g_packet)
6132 store_registers_using_G (regcache);
6136 store_registers_using_G (regcache);
6138 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
6139 if (!rsa->regs[i].in_g_packet)
6140 if (!store_register_using_P (regcache, &rsa->regs[i]))
6141 /* See above for why we do not issue an error here. */
6146 /* Return the number of hex digits in num. */
6149 hexnumlen (ULONGEST num)
6153 for (i = 0; num != 0; i++)
6159 /* Set BUF to the minimum number of hex digits representing NUM. */
6162 hexnumstr (char *buf, ULONGEST num)
6164 int len = hexnumlen (num);
6166 return hexnumnstr (buf, num, len);
6170 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
6173 hexnumnstr (char *buf, ULONGEST num, int width)
6179 for (i = width - 1; i >= 0; i--)
6181 buf[i] = "0123456789abcdef"[(num & 0xf)];
6188 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
6191 remote_address_masked (CORE_ADDR addr)
6193 int address_size = remote_address_size;
6195 /* If "remoteaddresssize" was not set, default to target address size. */
6197 address_size = gdbarch_addr_bit (target_gdbarch);
6199 if (address_size > 0
6200 && address_size < (sizeof (ULONGEST) * 8))
6202 /* Only create a mask when that mask can safely be constructed
6203 in a ULONGEST variable. */
6206 mask = (mask << address_size) - 1;
6212 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
6213 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
6214 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
6215 (which may be more than *OUT_LEN due to escape characters). The
6216 total number of bytes in the output buffer will be at most
6220 remote_escape_output (const gdb_byte *buffer, int len,
6221 gdb_byte *out_buf, int *out_len,
6224 int input_index, output_index;
6227 for (input_index = 0; input_index < len; input_index++)
6229 gdb_byte b = buffer[input_index];
6231 if (b == '$' || b == '#' || b == '}')
6233 /* These must be escaped. */
6234 if (output_index + 2 > out_maxlen)
6236 out_buf[output_index++] = '}';
6237 out_buf[output_index++] = b ^ 0x20;
6241 if (output_index + 1 > out_maxlen)
6243 out_buf[output_index++] = b;
6247 *out_len = input_index;
6248 return output_index;
6251 /* Convert BUFFER, escaped data LEN bytes long, into binary data
6252 in OUT_BUF. Return the number of bytes written to OUT_BUF.
6253 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
6255 This function reverses remote_escape_output. It allows more
6256 escaped characters than that function does, in particular because
6257 '*' must be escaped to avoid the run-length encoding processing
6258 in reading packets. */
6261 remote_unescape_input (const gdb_byte *buffer, int len,
6262 gdb_byte *out_buf, int out_maxlen)
6264 int input_index, output_index;
6269 for (input_index = 0; input_index < len; input_index++)
6271 gdb_byte b = buffer[input_index];
6273 if (output_index + 1 > out_maxlen)
6275 warning (_("Received too much data from remote target;"
6276 " ignoring overflow."));
6277 return output_index;
6282 out_buf[output_index++] = b ^ 0x20;
6288 out_buf[output_index++] = b;
6292 error (_("Unmatched escape character in target response."));
6294 return output_index;
6297 /* Determine whether the remote target supports binary downloading.
6298 This is accomplished by sending a no-op memory write of zero length
6299 to the target at the specified address. It does not suffice to send
6300 the whole packet, since many stubs strip the eighth bit and
6301 subsequently compute a wrong checksum, which causes real havoc with
6304 NOTE: This can still lose if the serial line is not eight-bit
6305 clean. In cases like this, the user should clear "remote
6309 check_binary_download (CORE_ADDR addr)
6311 struct remote_state *rs = get_remote_state ();
6313 switch (remote_protocol_packets[PACKET_X].support)
6315 case PACKET_DISABLE:
6319 case PACKET_SUPPORT_UNKNOWN:
6325 p += hexnumstr (p, (ULONGEST) addr);
6327 p += hexnumstr (p, (ULONGEST) 0);
6331 putpkt_binary (rs->buf, (int) (p - rs->buf));
6332 getpkt (&rs->buf, &rs->buf_size, 0);
6334 if (rs->buf[0] == '\0')
6337 fprintf_unfiltered (gdb_stdlog,
6338 "binary downloading NOT "
6339 "supported by target\n");
6340 remote_protocol_packets[PACKET_X].support = PACKET_DISABLE;
6345 fprintf_unfiltered (gdb_stdlog,
6346 "binary downloading supported by target\n");
6347 remote_protocol_packets[PACKET_X].support = PACKET_ENABLE;
6354 /* Write memory data directly to the remote machine.
6355 This does not inform the data cache; the data cache uses this.
6356 HEADER is the starting part of the packet.
6357 MEMADDR is the address in the remote memory space.
6358 MYADDR is the address of the buffer in our space.
6359 LEN is the number of bytes.
6360 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
6361 should send data as binary ('X'), or hex-encoded ('M').
6363 The function creates packet of the form
6364 <HEADER><ADDRESS>,<LENGTH>:<DATA>
6366 where encoding of <DATA> is termined by PACKET_FORMAT.
6368 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
6371 Returns the number of bytes transferred, or 0 (setting errno) for
6372 error. Only transfer a single packet. */
6375 remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
6376 const gdb_byte *myaddr, int len,
6377 char packet_format, int use_length)
6379 struct remote_state *rs = get_remote_state ();
6389 if (packet_format != 'X' && packet_format != 'M')
6390 internal_error (__FILE__, __LINE__,
6391 _("remote_write_bytes_aux: bad packet format"));
6396 payload_size = get_memory_write_packet_size ();
6398 /* The packet buffer will be large enough for the payload;
6399 get_memory_packet_size ensures this. */
6402 /* Compute the size of the actual payload by subtracting out the
6403 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
6405 payload_size -= strlen ("$,:#NN");
6407 /* The comma won't be used. */
6409 header_length = strlen (header);
6410 payload_size -= header_length;
6411 payload_size -= hexnumlen (memaddr);
6413 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
6415 strcat (rs->buf, header);
6416 p = rs->buf + strlen (header);
6418 /* Compute a best guess of the number of bytes actually transfered. */
6419 if (packet_format == 'X')
6421 /* Best guess at number of bytes that will fit. */
6422 todo = min (len, payload_size);
6424 payload_size -= hexnumlen (todo);
6425 todo = min (todo, payload_size);
6429 /* Num bytes that will fit. */
6430 todo = min (len, payload_size / 2);
6432 payload_size -= hexnumlen (todo);
6433 todo = min (todo, payload_size / 2);
6437 internal_error (__FILE__, __LINE__,
6438 _("minimum packet size too small to write data"));
6440 /* If we already need another packet, then try to align the end
6441 of this packet to a useful boundary. */
6442 if (todo > 2 * REMOTE_ALIGN_WRITES && todo < len)
6443 todo = ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr;
6445 /* Append "<memaddr>". */
6446 memaddr = remote_address_masked (memaddr);
6447 p += hexnumstr (p, (ULONGEST) memaddr);
6454 /* Append <len>. Retain the location/size of <len>. It may need to
6455 be adjusted once the packet body has been created. */
6457 plenlen = hexnumstr (p, (ULONGEST) todo);
6465 /* Append the packet body. */
6466 if (packet_format == 'X')
6468 /* Binary mode. Send target system values byte by byte, in
6469 increasing byte addresses. Only escape certain critical
6471 payload_length = remote_escape_output (myaddr, todo, p, &nr_bytes,
6474 /* If not all TODO bytes fit, then we'll need another packet. Make
6475 a second try to keep the end of the packet aligned. Don't do
6476 this if the packet is tiny. */
6477 if (nr_bytes < todo && nr_bytes > 2 * REMOTE_ALIGN_WRITES)
6481 new_nr_bytes = (((memaddr + nr_bytes) & ~(REMOTE_ALIGN_WRITES - 1))
6483 if (new_nr_bytes != nr_bytes)
6484 payload_length = remote_escape_output (myaddr, new_nr_bytes,
6489 p += payload_length;
6490 if (use_length && nr_bytes < todo)
6492 /* Escape chars have filled up the buffer prematurely,
6493 and we have actually sent fewer bytes than planned.
6494 Fix-up the length field of the packet. Use the same
6495 number of characters as before. */
6496 plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen);
6497 *plen = ':'; /* overwrite \0 from hexnumnstr() */
6502 /* Normal mode: Send target system values byte by byte, in
6503 increasing byte addresses. Each byte is encoded as a two hex
6505 nr_bytes = bin2hex (myaddr, p, todo);
6509 putpkt_binary (rs->buf, (int) (p - rs->buf));
6510 getpkt (&rs->buf, &rs->buf_size, 0);
6512 if (rs->buf[0] == 'E')
6514 /* There is no correspondance between what the remote protocol
6515 uses for errors and errno codes. We would like a cleaner way
6516 of representing errors (big enough to include errno codes,
6517 bfd_error codes, and others). But for now just return EIO. */
6522 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
6523 fewer bytes than we'd planned. */
6527 /* Write memory data directly to the remote machine.
6528 This does not inform the data cache; the data cache uses this.
6529 MEMADDR is the address in the remote memory space.
6530 MYADDR is the address of the buffer in our space.
6531 LEN is the number of bytes.
6533 Returns number of bytes transferred, or 0 (setting errno) for
6534 error. Only transfer a single packet. */
6537 remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
6539 char *packet_format = 0;
6541 /* Check whether the target supports binary download. */
6542 check_binary_download (memaddr);
6544 switch (remote_protocol_packets[PACKET_X].support)
6547 packet_format = "X";
6549 case PACKET_DISABLE:
6550 packet_format = "M";
6552 case PACKET_SUPPORT_UNKNOWN:
6553 internal_error (__FILE__, __LINE__,
6554 _("remote_write_bytes: bad internal state"));
6556 internal_error (__FILE__, __LINE__, _("bad switch"));
6559 return remote_write_bytes_aux (packet_format,
6560 memaddr, myaddr, len, packet_format[0], 1);
6563 /* Read memory data directly from the remote machine.
6564 This does not use the data cache; the data cache uses this.
6565 MEMADDR is the address in the remote memory space.
6566 MYADDR is the address of the buffer in our space.
6567 LEN is the number of bytes.
6569 Returns number of bytes transferred, or 0 for error. */
6572 remote_read_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
6574 struct remote_state *rs = get_remote_state ();
6575 int max_buf_size; /* Max size of packet output buffer. */
6583 max_buf_size = get_memory_read_packet_size ();
6584 /* The packet buffer will be large enough for the payload;
6585 get_memory_packet_size ensures this. */
6587 /* Number if bytes that will fit. */
6588 todo = min (len, max_buf_size / 2);
6590 /* Construct "m"<memaddr>","<len>". */
6591 memaddr = remote_address_masked (memaddr);
6594 p += hexnumstr (p, (ULONGEST) memaddr);
6596 p += hexnumstr (p, (ULONGEST) todo);
6599 getpkt (&rs->buf, &rs->buf_size, 0);
6600 if (rs->buf[0] == 'E'
6601 && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2])
6602 && rs->buf[3] == '\0')
6604 /* There is no correspondance between what the remote protocol
6605 uses for errors and errno codes. We would like a cleaner way
6606 of representing errors (big enough to include errno codes,
6607 bfd_error codes, and others). But for now just return
6612 /* Reply describes memory byte by byte, each byte encoded as two hex
6615 i = hex2bin (p, myaddr, todo);
6616 /* Return what we have. Let higher layers handle partial reads. */
6621 /* Remote notification handler. */
6624 handle_notification (char *buf, size_t length)
6626 if (strncmp (buf, "Stop:", 5) == 0)
6628 if (pending_stop_reply)
6630 /* We've already parsed the in-flight stop-reply, but the
6631 stub for some reason thought we didn't, possibly due to
6632 timeout on its side. Just ignore it. */
6634 fprintf_unfiltered (gdb_stdlog, "ignoring resent notification\n");
6638 struct cleanup *old_chain;
6639 struct stop_reply *reply = stop_reply_xmalloc ();
6641 old_chain = make_cleanup (do_stop_reply_xfree, reply);
6643 remote_parse_stop_reply (buf + 5, reply);
6645 discard_cleanups (old_chain);
6647 /* Be careful to only set it after parsing, since an error
6648 may be thrown then. */
6649 pending_stop_reply = reply;
6651 /* Notify the event loop there's a stop reply to acknowledge
6652 and that there may be more events to fetch. */
6653 mark_async_event_handler (remote_async_get_pending_events_token);
6656 fprintf_unfiltered (gdb_stdlog, "stop notification captured\n");
6660 /* We ignore notifications we don't recognize, for compatibility
6661 with newer stubs. */
6666 /* Read or write LEN bytes from inferior memory at MEMADDR,
6667 transferring to or from debugger address BUFFER. Write to inferior
6668 if SHOULD_WRITE is nonzero. Returns length of data written or
6669 read; 0 for error. TARGET is unused. */
6672 remote_xfer_memory (CORE_ADDR mem_addr, gdb_byte *buffer, int mem_len,
6673 int should_write, struct mem_attrib *attrib,
6674 struct target_ops *target)
6678 set_remote_traceframe ();
6679 set_general_thread (inferior_ptid);
6682 res = remote_write_bytes (mem_addr, buffer, mem_len);
6684 res = remote_read_bytes (mem_addr, buffer, mem_len);
6689 /* Sends a packet with content determined by the printf format string
6690 FORMAT and the remaining arguments, then gets the reply. Returns
6691 whether the packet was a success, a failure, or unknown. */
6693 static enum packet_result
6694 remote_send_printf (const char *format, ...)
6696 struct remote_state *rs = get_remote_state ();
6697 int max_size = get_remote_packet_size ();
6700 va_start (ap, format);
6703 if (vsnprintf (rs->buf, max_size, format, ap) >= max_size)
6704 internal_error (__FILE__, __LINE__, _("Too long remote packet."));
6706 if (putpkt (rs->buf) < 0)
6707 error (_("Communication problem with target."));
6710 getpkt (&rs->buf, &rs->buf_size, 0);
6712 return packet_check_result (rs->buf);
6716 restore_remote_timeout (void *p)
6718 int value = *(int *)p;
6720 remote_timeout = value;
6723 /* Flash writing can take quite some time. We'll set
6724 effectively infinite timeout for flash operations.
6725 In future, we'll need to decide on a better approach. */
6726 static const int remote_flash_timeout = 1000;
6729 remote_flash_erase (struct target_ops *ops,
6730 ULONGEST address, LONGEST length)
6732 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
6733 int saved_remote_timeout = remote_timeout;
6734 enum packet_result ret;
6735 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
6736 &saved_remote_timeout);
6738 remote_timeout = remote_flash_timeout;
6740 ret = remote_send_printf ("vFlashErase:%s,%s",
6741 phex (address, addr_size),
6745 case PACKET_UNKNOWN:
6746 error (_("Remote target does not support flash erase"));
6748 error (_("Error erasing flash with vFlashErase packet"));
6753 do_cleanups (back_to);
6757 remote_flash_write (struct target_ops *ops,
6758 ULONGEST address, LONGEST length,
6759 const gdb_byte *data)
6761 int saved_remote_timeout = remote_timeout;
6763 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
6764 &saved_remote_timeout);
6766 remote_timeout = remote_flash_timeout;
6767 ret = remote_write_bytes_aux ("vFlashWrite:", address, data, length, 'X', 0);
6768 do_cleanups (back_to);
6774 remote_flash_done (struct target_ops *ops)
6776 int saved_remote_timeout = remote_timeout;
6778 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
6779 &saved_remote_timeout);
6781 remote_timeout = remote_flash_timeout;
6782 ret = remote_send_printf ("vFlashDone");
6783 do_cleanups (back_to);
6787 case PACKET_UNKNOWN:
6788 error (_("Remote target does not support vFlashDone"));
6790 error (_("Error finishing flash operation"));
6797 remote_files_info (struct target_ops *ignore)
6799 puts_filtered ("Debugging a target over a serial line.\n");
6802 /* Stuff for dealing with the packets which are part of this protocol.
6803 See comment at top of file for details. */
6805 /* Read a single character from the remote end. */
6808 readchar (int timeout)
6812 ch = serial_readchar (remote_desc, timeout);
6817 switch ((enum serial_rc) ch)
6821 error (_("Remote connection closed"));
6825 perror_with_name (_("Remote communication error. "
6826 "Target disconnected."));
6828 case SERIAL_TIMEOUT:
6834 /* Send the command in *BUF to the remote machine, and read the reply
6835 into *BUF. Report an error if we get an error reply. Resize
6836 *BUF using xrealloc if necessary to hold the result, and update
6840 remote_send (char **buf,
6844 getpkt (buf, sizeof_buf, 0);
6846 if ((*buf)[0] == 'E')
6847 error (_("Remote failure reply: %s"), *buf);
6850 /* Return a pointer to an xmalloc'ed string representing an escaped
6851 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
6852 etc. The caller is responsible for releasing the returned
6856 escape_buffer (const char *buf, int n)
6858 struct cleanup *old_chain;
6859 struct ui_file *stb;
6862 stb = mem_fileopen ();
6863 old_chain = make_cleanup_ui_file_delete (stb);
6865 fputstrn_unfiltered (buf, n, 0, stb);
6866 str = ui_file_xstrdup (stb, NULL);
6867 do_cleanups (old_chain);
6871 /* Display a null-terminated packet on stdout, for debugging, using C
6875 print_packet (char *buf)
6877 puts_filtered ("\"");
6878 fputstr_filtered (buf, '"', gdb_stdout);
6879 puts_filtered ("\"");
6885 return putpkt_binary (buf, strlen (buf));
6888 /* Send a packet to the remote machine, with error checking. The data
6889 of the packet is in BUF. The string in BUF can be at most
6890 get_remote_packet_size () - 5 to account for the $, # and checksum,
6891 and for a possible /0 if we are debugging (remote_debug) and want
6892 to print the sent packet as a string. */
6895 putpkt_binary (char *buf, int cnt)
6897 struct remote_state *rs = get_remote_state ();
6899 unsigned char csum = 0;
6900 char *buf2 = alloca (cnt + 6);
6906 /* Catch cases like trying to read memory or listing threads while
6907 we're waiting for a stop reply. The remote server wouldn't be
6908 ready to handle this request, so we'd hang and timeout. We don't
6909 have to worry about this in synchronous mode, because in that
6910 case it's not possible to issue a command while the target is
6911 running. This is not a problem in non-stop mode, because in that
6912 case, the stub is always ready to process serial input. */
6913 if (!non_stop && target_can_async_p () && rs->waiting_for_stop_reply)
6914 error (_("Cannot execute this command while the target is running."));
6916 /* We're sending out a new packet. Make sure we don't look at a
6917 stale cached response. */
6918 rs->cached_wait_status = 0;
6920 /* Copy the packet into buffer BUF2, encapsulating it
6921 and giving it a checksum. */
6926 for (i = 0; i < cnt; i++)
6932 *p++ = tohex ((csum >> 4) & 0xf);
6933 *p++ = tohex (csum & 0xf);
6935 /* Send it over and over until we get a positive ack. */
6939 int started_error_output = 0;
6943 struct cleanup *old_chain;
6947 str = escape_buffer (buf2, p - buf2);
6948 old_chain = make_cleanup (xfree, str);
6949 fprintf_unfiltered (gdb_stdlog, "Sending packet: %s...", str);
6950 gdb_flush (gdb_stdlog);
6951 do_cleanups (old_chain);
6953 if (serial_write (remote_desc, buf2, p - buf2))
6954 perror_with_name (_("putpkt: write failed"));
6956 /* If this is a no acks version of the remote protocol, send the
6957 packet and move on. */
6961 /* Read until either a timeout occurs (-2) or '+' is read.
6962 Handle any notification that arrives in the mean time. */
6965 ch = readchar (remote_timeout);
6973 case SERIAL_TIMEOUT:
6976 if (started_error_output)
6978 putchar_unfiltered ('\n');
6979 started_error_output = 0;
6988 fprintf_unfiltered (gdb_stdlog, "Ack\n");
6992 fprintf_unfiltered (gdb_stdlog, "Nak\n");
6994 case SERIAL_TIMEOUT:
6998 break; /* Retransmit buffer. */
7002 fprintf_unfiltered (gdb_stdlog,
7003 "Packet instead of Ack, ignoring it\n");
7004 /* It's probably an old response sent because an ACK
7005 was lost. Gobble up the packet and ack it so it
7006 doesn't get retransmitted when we resend this
7009 serial_write (remote_desc, "+", 1);
7010 continue; /* Now, go look for +. */
7017 /* If we got a notification, handle it, and go back to looking
7019 /* We've found the start of a notification. Now
7020 collect the data. */
7021 val = read_frame (&rs->buf, &rs->buf_size);
7026 struct cleanup *old_chain;
7029 str = escape_buffer (rs->buf, val);
7030 old_chain = make_cleanup (xfree, str);
7031 fprintf_unfiltered (gdb_stdlog,
7032 " Notification received: %s\n",
7034 do_cleanups (old_chain);
7036 handle_notification (rs->buf, val);
7037 /* We're in sync now, rewait for the ack. */
7044 if (!started_error_output)
7046 started_error_output = 1;
7047 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
7049 fputc_unfiltered (ch & 0177, gdb_stdlog);
7050 fprintf_unfiltered (gdb_stdlog, "%s", rs->buf);
7059 if (!started_error_output)
7061 started_error_output = 1;
7062 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
7064 fputc_unfiltered (ch & 0177, gdb_stdlog);
7068 break; /* Here to retransmit. */
7072 /* This is wrong. If doing a long backtrace, the user should be
7073 able to get out next time we call QUIT, without anything as
7074 violent as interrupt_query. If we want to provide a way out of
7075 here without getting to the next QUIT, it should be based on
7076 hitting ^C twice as in remote_wait. */
7087 /* Come here after finding the start of a frame when we expected an
7088 ack. Do our best to discard the rest of this packet. */
7097 c = readchar (remote_timeout);
7100 case SERIAL_TIMEOUT:
7101 /* Nothing we can do. */
7104 /* Discard the two bytes of checksum and stop. */
7105 c = readchar (remote_timeout);
7107 c = readchar (remote_timeout);
7110 case '*': /* Run length encoding. */
7111 /* Discard the repeat count. */
7112 c = readchar (remote_timeout);
7117 /* A regular character. */
7123 /* Come here after finding the start of the frame. Collect the rest
7124 into *BUF, verifying the checksum, length, and handling run-length
7125 compression. NUL terminate the buffer. If there is not enough room,
7126 expand *BUF using xrealloc.
7128 Returns -1 on error, number of characters in buffer (ignoring the
7129 trailing NULL) on success. (could be extended to return one of the
7130 SERIAL status indications). */
7133 read_frame (char **buf_p,
7140 struct remote_state *rs = get_remote_state ();
7147 c = readchar (remote_timeout);
7150 case SERIAL_TIMEOUT:
7152 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
7156 fputs_filtered ("Saw new packet start in middle of old one\n",
7158 return -1; /* Start a new packet, count retries. */
7161 unsigned char pktcsum;
7167 check_0 = readchar (remote_timeout);
7169 check_1 = readchar (remote_timeout);
7171 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
7174 fputs_filtered ("Timeout in checksum, retrying\n",
7178 else if (check_0 < 0 || check_1 < 0)
7181 fputs_filtered ("Communication error in checksum\n",
7186 /* Don't recompute the checksum; with no ack packets we
7187 don't have any way to indicate a packet retransmission
7192 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
7193 if (csum == pktcsum)
7198 struct cleanup *old_chain;
7201 str = escape_buffer (buf, bc);
7202 old_chain = make_cleanup (xfree, str);
7203 fprintf_unfiltered (gdb_stdlog,
7204 "Bad checksum, sentsum=0x%x, "
7205 "csum=0x%x, buf=%s\n",
7206 pktcsum, csum, str);
7207 do_cleanups (old_chain);
7209 /* Number of characters in buffer ignoring trailing
7213 case '*': /* Run length encoding. */
7218 c = readchar (remote_timeout);
7220 repeat = c - ' ' + 3; /* Compute repeat count. */
7222 /* The character before ``*'' is repeated. */
7224 if (repeat > 0 && repeat <= 255 && bc > 0)
7226 if (bc + repeat - 1 >= *sizeof_buf - 1)
7228 /* Make some more room in the buffer. */
7229 *sizeof_buf += repeat;
7230 *buf_p = xrealloc (*buf_p, *sizeof_buf);
7234 memset (&buf[bc], buf[bc - 1], repeat);
7240 printf_filtered (_("Invalid run length encoding: %s\n"), buf);
7244 if (bc >= *sizeof_buf - 1)
7246 /* Make some more room in the buffer. */
7248 *buf_p = xrealloc (*buf_p, *sizeof_buf);
7259 /* Read a packet from the remote machine, with error checking, and
7260 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
7261 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
7262 rather than timing out; this is used (in synchronous mode) to wait
7263 for a target that is is executing user code to stop. */
7264 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
7265 don't have to change all the calls to getpkt to deal with the
7266 return value, because at the moment I don't know what the right
7267 thing to do it for those. */
7275 timed_out = getpkt_sane (buf, sizeof_buf, forever);
7279 /* Read a packet from the remote machine, with error checking, and
7280 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
7281 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
7282 rather than timing out; this is used (in synchronous mode) to wait
7283 for a target that is is executing user code to stop. If FOREVER ==
7284 0, this function is allowed to time out gracefully and return an
7285 indication of this to the caller. Otherwise return the number of
7286 bytes read. If EXPECTING_NOTIF, consider receiving a notification
7287 enough reason to return to the caller. */
7290 getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf, int forever,
7291 int expecting_notif)
7293 struct remote_state *rs = get_remote_state ();
7299 /* We're reading a new response. Make sure we don't look at a
7300 previously cached response. */
7301 rs->cached_wait_status = 0;
7303 strcpy (*buf, "timeout");
7306 timeout = watchdog > 0 ? watchdog : -1;
7307 else if (expecting_notif)
7308 timeout = 0; /* There should already be a char in the buffer. If
7311 timeout = remote_timeout;
7315 /* Process any number of notifications, and then return when
7319 /* If we get a timeout or bad checksm, retry up to MAX_TRIES
7321 for (tries = 1; tries <= MAX_TRIES; tries++)
7323 /* This can loop forever if the remote side sends us
7324 characters continuously, but if it pauses, we'll get
7325 SERIAL_TIMEOUT from readchar because of timeout. Then
7326 we'll count that as a retry.
7328 Note that even when forever is set, we will only wait
7329 forever prior to the start of a packet. After that, we
7330 expect characters to arrive at a brisk pace. They should
7331 show up within remote_timeout intervals. */
7333 c = readchar (timeout);
7334 while (c != SERIAL_TIMEOUT && c != '$' && c != '%');
7336 if (c == SERIAL_TIMEOUT)
7338 if (expecting_notif)
7339 return -1; /* Don't complain, it's normal to not get
7340 anything in this case. */
7342 if (forever) /* Watchdog went off? Kill the target. */
7346 error (_("Watchdog timeout has expired. Target detached."));
7349 fputs_filtered ("Timed out.\n", gdb_stdlog);
7353 /* We've found the start of a packet or notification.
7354 Now collect the data. */
7355 val = read_frame (buf, sizeof_buf);
7360 serial_write (remote_desc, "-", 1);
7363 if (tries > MAX_TRIES)
7365 /* We have tried hard enough, and just can't receive the
7366 packet/notification. Give up. */
7367 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
7369 /* Skip the ack char if we're in no-ack mode. */
7370 if (!rs->noack_mode)
7371 serial_write (remote_desc, "+", 1);
7375 /* If we got an ordinary packet, return that to our caller. */
7380 struct cleanup *old_chain;
7383 str = escape_buffer (*buf, val);
7384 old_chain = make_cleanup (xfree, str);
7385 fprintf_unfiltered (gdb_stdlog, "Packet received: %s\n", str);
7386 do_cleanups (old_chain);
7389 /* Skip the ack char if we're in no-ack mode. */
7390 if (!rs->noack_mode)
7391 serial_write (remote_desc, "+", 1);
7395 /* If we got a notification, handle it, and go back to looking
7399 gdb_assert (c == '%');
7403 struct cleanup *old_chain;
7406 str = escape_buffer (*buf, val);
7407 old_chain = make_cleanup (xfree, str);
7408 fprintf_unfiltered (gdb_stdlog,
7409 " Notification received: %s\n",
7411 do_cleanups (old_chain);
7414 handle_notification (*buf, val);
7416 /* Notifications require no acknowledgement. */
7418 if (expecting_notif)
7425 getpkt_sane (char **buf, long *sizeof_buf, int forever)
7427 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 0);
7431 getpkt_or_notif_sane (char **buf, long *sizeof_buf, int forever)
7433 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 1);
7437 /* A helper function that just calls putpkt; for type correctness. */
7440 putpkt_for_catch_errors (void *arg)
7442 return putpkt (arg);
7446 remote_kill (struct target_ops *ops)
7448 /* Use catch_errors so the user can quit from gdb even when we
7449 aren't on speaking terms with the remote system. */
7450 catch_errors (putpkt_for_catch_errors, "k", "", RETURN_MASK_ERROR);
7452 /* Don't wait for it to die. I'm not really sure it matters whether
7453 we do or not. For the existing stubs, kill is a noop. */
7454 target_mourn_inferior ();
7458 remote_vkill (int pid, struct remote_state *rs)
7460 if (remote_protocol_packets[PACKET_vKill].support == PACKET_DISABLE)
7463 /* Tell the remote target to detach. */
7464 sprintf (rs->buf, "vKill;%x", pid);
7466 getpkt (&rs->buf, &rs->buf_size, 0);
7468 if (packet_ok (rs->buf,
7469 &remote_protocol_packets[PACKET_vKill]) == PACKET_OK)
7471 else if (remote_protocol_packets[PACKET_vKill].support == PACKET_DISABLE)
7478 extended_remote_kill (struct target_ops *ops)
7481 int pid = ptid_get_pid (inferior_ptid);
7482 struct remote_state *rs = get_remote_state ();
7484 res = remote_vkill (pid, rs);
7485 if (res == -1 && !(rs->extended && remote_multi_process_p (rs)))
7487 /* Don't try 'k' on a multi-process aware stub -- it has no way
7488 to specify the pid. */
7492 getpkt (&rs->buf, &rs->buf_size, 0);
7493 if (rs->buf[0] != 'O' || rs->buf[0] != 'K')
7496 /* Don't wait for it to die. I'm not really sure it matters whether
7497 we do or not. For the existing stubs, kill is a noop. */
7503 error (_("Can't kill process"));
7505 target_mourn_inferior ();
7509 remote_mourn (struct target_ops *ops)
7511 remote_mourn_1 (ops);
7514 /* Worker function for remote_mourn. */
7516 remote_mourn_1 (struct target_ops *target)
7518 unpush_target (target);
7520 /* remote_close takes care of doing most of the clean up. */
7521 generic_mourn_inferior ();
7525 extended_remote_mourn_1 (struct target_ops *target)
7527 struct remote_state *rs = get_remote_state ();
7529 /* In case we got here due to an error, but we're going to stay
7531 rs->waiting_for_stop_reply = 0;
7533 /* We're no longer interested in these events. */
7534 discard_pending_stop_replies (ptid_get_pid (inferior_ptid));
7536 /* If the current general thread belonged to the process we just
7537 detached from or has exited, the remote side current general
7538 thread becomes undefined. Considering a case like this:
7540 - We just got here due to a detach.
7541 - The process that we're detaching from happens to immediately
7542 report a global breakpoint being hit in non-stop mode, in the
7543 same thread we had selected before.
7544 - GDB attaches to this process again.
7545 - This event happens to be the next event we handle.
7547 GDB would consider that the current general thread didn't need to
7548 be set on the stub side (with Hg), since for all it knew,
7549 GENERAL_THREAD hadn't changed.
7551 Notice that although in all-stop mode, the remote server always
7552 sets the current thread to the thread reporting the stop event,
7553 that doesn't happen in non-stop mode; in non-stop, the stub *must
7554 not* change the current thread when reporting a breakpoint hit,
7555 due to the decoupling of event reporting and event handling.
7557 To keep things simple, we always invalidate our notion of the
7559 record_currthread (minus_one_ptid);
7561 /* Unlike "target remote", we do not want to unpush the target; then
7562 the next time the user says "run", we won't be connected. */
7564 /* Call common code to mark the inferior as not running. */
7565 generic_mourn_inferior ();
7567 if (!have_inferiors ())
7569 if (!remote_multi_process_p (rs))
7571 /* Check whether the target is running now - some remote stubs
7572 automatically restart after kill. */
7574 getpkt (&rs->buf, &rs->buf_size, 0);
7576 if (rs->buf[0] == 'S' || rs->buf[0] == 'T')
7578 /* Assume that the target has been restarted. Set
7579 inferior_ptid so that bits of core GDB realizes
7580 there's something here, e.g., so that the user can
7581 say "kill" again. */
7582 inferior_ptid = magic_null_ptid;
7589 extended_remote_mourn (struct target_ops *ops)
7591 extended_remote_mourn_1 (ops);
7595 extended_remote_supports_disable_randomization (void)
7597 return (remote_protocol_packets[PACKET_QDisableRandomization].support
7602 extended_remote_disable_randomization (int val)
7604 struct remote_state *rs = get_remote_state ();
7607 sprintf (rs->buf, "QDisableRandomization:%x", val);
7609 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
7611 error (_("Target does not support QDisableRandomization."));
7612 if (strcmp (reply, "OK") != 0)
7613 error (_("Bogus QDisableRandomization reply from target: %s"), reply);
7617 extended_remote_run (char *args)
7619 struct remote_state *rs = get_remote_state ();
7622 /* If the user has disabled vRun support, or we have detected that
7623 support is not available, do not try it. */
7624 if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE)
7627 strcpy (rs->buf, "vRun;");
7628 len = strlen (rs->buf);
7630 if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ())
7631 error (_("Remote file name too long for run packet"));
7632 len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len, 0);
7634 gdb_assert (args != NULL);
7637 struct cleanup *back_to;
7641 argv = gdb_buildargv (args);
7642 back_to = make_cleanup ((void (*) (void *)) freeargv, argv);
7643 for (i = 0; argv[i] != NULL; i++)
7645 if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ())
7646 error (_("Argument list too long for run packet"));
7647 rs->buf[len++] = ';';
7648 len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len, 0);
7650 do_cleanups (back_to);
7653 rs->buf[len++] = '\0';
7656 getpkt (&rs->buf, &rs->buf_size, 0);
7658 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]) == PACKET_OK)
7660 /* We have a wait response; we don't need it, though. All is well. */
7663 else if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE)
7664 /* It wasn't disabled before, but it is now. */
7668 if (remote_exec_file[0] == '\0')
7669 error (_("Running the default executable on the remote target failed; "
7670 "try \"set remote exec-file\"?"));
7672 error (_("Running \"%s\" on the remote target failed"),
7677 /* In the extended protocol we want to be able to do things like
7678 "run" and have them basically work as expected. So we need
7679 a special create_inferior function. We support changing the
7680 executable file and the command line arguments, but not the
7684 extended_remote_create_inferior_1 (char *exec_file, char *args,
7685 char **env, int from_tty)
7687 /* If running asynchronously, register the target file descriptor
7688 with the event loop. */
7689 if (target_can_async_p ())
7690 target_async (inferior_event_handler, 0);
7692 /* Disable address space randomization if requested (and supported). */
7693 if (extended_remote_supports_disable_randomization ())
7694 extended_remote_disable_randomization (disable_randomization);
7696 /* Now restart the remote server. */
7697 if (extended_remote_run (args) == -1)
7699 /* vRun was not supported. Fail if we need it to do what the
7701 if (remote_exec_file[0])
7702 error (_("Remote target does not support \"set remote exec-file\""));
7704 error (_("Remote target does not support \"set args\" or run <ARGS>"));
7706 /* Fall back to "R". */
7707 extended_remote_restart ();
7710 if (!have_inferiors ())
7712 /* Clean up from the last time we ran, before we mark the target
7713 running again. This will mark breakpoints uninserted, and
7714 get_offsets may insert breakpoints. */
7715 init_thread_list ();
7716 init_wait_for_inferior ();
7719 add_current_inferior_and_thread ();
7721 /* Get updated offsets, if the stub uses qOffsets. */
7726 extended_remote_create_inferior (struct target_ops *ops,
7727 char *exec_file, char *args,
7728 char **env, int from_tty)
7730 extended_remote_create_inferior_1 (exec_file, args, env, from_tty);
7734 /* Given a location's target info BP_TGT and the packet buffer BUF, output
7735 the list of conditions (in agent expression bytecode format), if any, the
7736 target needs to evaluate. The output is placed into the packet buffer
7740 remote_add_target_side_condition (struct gdbarch *gdbarch,
7741 struct bp_target_info *bp_tgt, char *buf)
7743 struct agent_expr *aexpr = NULL;
7746 char *buf_start = buf;
7748 if (VEC_empty (agent_expr_p, bp_tgt->conditions))
7751 buf += strlen (buf);
7752 sprintf (buf, "%s", ";");
7755 /* Send conditions to the target and free the vector. */
7757 VEC_iterate (agent_expr_p, bp_tgt->conditions, ix, aexpr);
7760 sprintf (buf, "X%x,", aexpr->len);
7761 buf += strlen (buf);
7762 for (i = 0; i < aexpr->len; ++i)
7763 buf = pack_hex_byte (buf, aexpr->buf[i]);
7767 VEC_free (agent_expr_p, bp_tgt->conditions);
7771 /* Insert a breakpoint. On targets that have software breakpoint
7772 support, we ask the remote target to do the work; on targets
7773 which don't, we insert a traditional memory breakpoint. */
7776 remote_insert_breakpoint (struct gdbarch *gdbarch,
7777 struct bp_target_info *bp_tgt)
7779 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
7780 If it succeeds, then set the support to PACKET_ENABLE. If it
7781 fails, and the user has explicitly requested the Z support then
7782 report an error, otherwise, mark it disabled and go on. */
7784 if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE)
7786 CORE_ADDR addr = bp_tgt->placed_address;
7787 struct remote_state *rs;
7790 struct condition_list *cond = NULL;
7792 gdbarch_remote_breakpoint_from_pc (gdbarch, &addr, &bpsize);
7794 rs = get_remote_state ();
7800 addr = (ULONGEST) remote_address_masked (addr);
7801 p += hexnumstr (p, addr);
7802 sprintf (p, ",%d", bpsize);
7804 if (remote_supports_cond_breakpoints ())
7805 remote_add_target_side_condition (gdbarch, bp_tgt, p);
7808 getpkt (&rs->buf, &rs->buf_size, 0);
7810 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0]))
7815 bp_tgt->placed_address = addr;
7816 bp_tgt->placed_size = bpsize;
7818 case PACKET_UNKNOWN:
7823 return memory_insert_breakpoint (gdbarch, bp_tgt);
7827 remote_remove_breakpoint (struct gdbarch *gdbarch,
7828 struct bp_target_info *bp_tgt)
7830 CORE_ADDR addr = bp_tgt->placed_address;
7831 struct remote_state *rs = get_remote_state ();
7833 if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE)
7841 addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
7842 p += hexnumstr (p, addr);
7843 sprintf (p, ",%d", bp_tgt->placed_size);
7846 getpkt (&rs->buf, &rs->buf_size, 0);
7848 return (rs->buf[0] == 'E');
7851 return memory_remove_breakpoint (gdbarch, bp_tgt);
7855 watchpoint_to_Z_packet (int type)
7860 return Z_PACKET_WRITE_WP;
7863 return Z_PACKET_READ_WP;
7866 return Z_PACKET_ACCESS_WP;
7869 internal_error (__FILE__, __LINE__,
7870 _("hw_bp_to_z: bad watchpoint type %d"), type);
7875 remote_insert_watchpoint (CORE_ADDR addr, int len, int type,
7876 struct expression *cond)
7878 struct remote_state *rs = get_remote_state ();
7880 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
7882 if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE)
7885 sprintf (rs->buf, "Z%x,", packet);
7886 p = strchr (rs->buf, '\0');
7887 addr = remote_address_masked (addr);
7888 p += hexnumstr (p, (ULONGEST) addr);
7889 sprintf (p, ",%x", len);
7892 getpkt (&rs->buf, &rs->buf_size, 0);
7894 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
7898 case PACKET_UNKNOWN:
7903 internal_error (__FILE__, __LINE__,
7904 _("remote_insert_watchpoint: reached end of function"));
7909 remote_remove_watchpoint (CORE_ADDR addr, int len, int type,
7910 struct expression *cond)
7912 struct remote_state *rs = get_remote_state ();
7914 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
7916 if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE)
7919 sprintf (rs->buf, "z%x,", packet);
7920 p = strchr (rs->buf, '\0');
7921 addr = remote_address_masked (addr);
7922 p += hexnumstr (p, (ULONGEST) addr);
7923 sprintf (p, ",%x", len);
7925 getpkt (&rs->buf, &rs->buf_size, 0);
7927 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
7930 case PACKET_UNKNOWN:
7935 internal_error (__FILE__, __LINE__,
7936 _("remote_remove_watchpoint: reached end of function"));
7940 int remote_hw_watchpoint_limit = -1;
7941 int remote_hw_watchpoint_length_limit = -1;
7942 int remote_hw_breakpoint_limit = -1;
7945 remote_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
7947 if (remote_hw_watchpoint_length_limit == 0)
7949 else if (remote_hw_watchpoint_length_limit < 0)
7951 else if (len <= remote_hw_watchpoint_length_limit)
7958 remote_check_watch_resources (int type, int cnt, int ot)
7960 if (type == bp_hardware_breakpoint)
7962 if (remote_hw_breakpoint_limit == 0)
7964 else if (remote_hw_breakpoint_limit < 0)
7966 else if (cnt <= remote_hw_breakpoint_limit)
7971 if (remote_hw_watchpoint_limit == 0)
7973 else if (remote_hw_watchpoint_limit < 0)
7977 else if (cnt <= remote_hw_watchpoint_limit)
7984 remote_stopped_by_watchpoint (void)
7986 return remote_stopped_by_watchpoint_p;
7990 remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
7994 if (remote_stopped_by_watchpoint ())
7996 *addr_p = remote_watch_data_address;
8005 remote_insert_hw_breakpoint (struct gdbarch *gdbarch,
8006 struct bp_target_info *bp_tgt)
8009 struct remote_state *rs;
8012 /* The length field should be set to the size of a breakpoint
8013 instruction, even though we aren't inserting one ourselves. */
8015 gdbarch_remote_breakpoint_from_pc
8016 (gdbarch, &bp_tgt->placed_address, &bp_tgt->placed_size);
8018 if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
8021 rs = get_remote_state ();
8028 addr = remote_address_masked (bp_tgt->placed_address);
8029 p += hexnumstr (p, (ULONGEST) addr);
8030 sprintf (p, ",%x", bp_tgt->placed_size);
8032 if (remote_supports_cond_breakpoints ())
8033 remote_add_target_side_condition (gdbarch, bp_tgt, p);
8036 getpkt (&rs->buf, &rs->buf_size, 0);
8038 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
8041 case PACKET_UNKNOWN:
8046 internal_error (__FILE__, __LINE__,
8047 _("remote_insert_hw_breakpoint: reached end of function"));
8052 remote_remove_hw_breakpoint (struct gdbarch *gdbarch,
8053 struct bp_target_info *bp_tgt)
8056 struct remote_state *rs = get_remote_state ();
8059 if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
8066 addr = remote_address_masked (bp_tgt->placed_address);
8067 p += hexnumstr (p, (ULONGEST) addr);
8068 sprintf (p, ",%x", bp_tgt->placed_size);
8071 getpkt (&rs->buf, &rs->buf_size, 0);
8073 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
8076 case PACKET_UNKNOWN:
8081 internal_error (__FILE__, __LINE__,
8082 _("remote_remove_hw_breakpoint: reached end of function"));
8085 /* Table used by the crc32 function to calcuate the checksum. */
8087 static unsigned long crc32_table[256] =
8090 static unsigned long
8091 crc32 (const unsigned char *buf, int len, unsigned int crc)
8093 if (!crc32_table[1])
8095 /* Initialize the CRC table and the decoding table. */
8099 for (i = 0; i < 256; i++)
8101 for (c = i << 24, j = 8; j > 0; --j)
8102 c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
8109 crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255];
8115 /* Verify memory using the "qCRC:" request. */
8118 remote_verify_memory (struct target_ops *ops,
8119 const gdb_byte *data, CORE_ADDR lma, ULONGEST size)
8121 struct remote_state *rs = get_remote_state ();
8122 unsigned long host_crc, target_crc;
8125 /* FIXME: assumes lma can fit into long. */
8126 xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx",
8127 (long) lma, (long) size);
8130 /* Be clever; compute the host_crc before waiting for target
8132 host_crc = crc32 (data, size, 0xffffffff);
8134 getpkt (&rs->buf, &rs->buf_size, 0);
8135 if (rs->buf[0] == 'E')
8138 if (rs->buf[0] != 'C')
8139 error (_("remote target does not support this operation"));
8141 for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++)
8142 target_crc = target_crc * 16 + fromhex (*tmp);
8144 return (host_crc == target_crc);
8147 /* compare-sections command
8149 With no arguments, compares each loadable section in the exec bfd
8150 with the same memory range on the target, and reports mismatches.
8151 Useful for verifying the image on the target against the exec file. */
8154 compare_sections_command (char *args, int from_tty)
8157 struct cleanup *old_chain;
8159 const char *sectname;
8167 error (_("command cannot be used without an exec file"));
8169 for (s = exec_bfd->sections; s; s = s->next)
8171 if (!(s->flags & SEC_LOAD))
8172 continue; /* Skip non-loadable section. */
8174 size = bfd_get_section_size (s);
8176 continue; /* Skip zero-length section. */
8178 sectname = bfd_get_section_name (exec_bfd, s);
8179 if (args && strcmp (args, sectname) != 0)
8180 continue; /* Not the section selected by user. */
8182 matched = 1; /* Do this section. */
8185 sectdata = xmalloc (size);
8186 old_chain = make_cleanup (xfree, sectdata);
8187 bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
8189 res = target_verify_memory (sectdata, lma, size);
8192 error (_("target memory fault, section %s, range %s -- %s"), sectname,
8193 paddress (target_gdbarch, lma),
8194 paddress (target_gdbarch, lma + size));
8196 printf_filtered ("Section %s, range %s -- %s: ", sectname,
8197 paddress (target_gdbarch, lma),
8198 paddress (target_gdbarch, lma + size));
8200 printf_filtered ("matched.\n");
8203 printf_filtered ("MIS-MATCHED!\n");
8207 do_cleanups (old_chain);
8210 warning (_("One or more sections of the remote executable does not match\n\
8211 the loaded file\n"));
8212 if (args && !matched)
8213 printf_filtered (_("No loaded section named '%s'.\n"), args);
8216 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
8217 into remote target. The number of bytes written to the remote
8218 target is returned, or -1 for error. */
8221 remote_write_qxfer (struct target_ops *ops, const char *object_name,
8222 const char *annex, const gdb_byte *writebuf,
8223 ULONGEST offset, LONGEST len,
8224 struct packet_config *packet)
8228 struct remote_state *rs = get_remote_state ();
8229 int max_size = get_memory_write_packet_size ();
8231 if (packet->support == PACKET_DISABLE)
8234 /* Insert header. */
8235 i = snprintf (rs->buf, max_size,
8236 "qXfer:%s:write:%s:%s:",
8237 object_name, annex ? annex : "",
8238 phex_nz (offset, sizeof offset));
8239 max_size -= (i + 1);
8241 /* Escape as much data as fits into rs->buf. */
8242 buf_len = remote_escape_output
8243 (writebuf, len, (rs->buf + i), &max_size, max_size);
8245 if (putpkt_binary (rs->buf, i + buf_len) < 0
8246 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
8247 || packet_ok (rs->buf, packet) != PACKET_OK)
8250 unpack_varlen_hex (rs->buf, &n);
8254 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
8255 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
8256 number of bytes read is returned, or 0 for EOF, or -1 for error.
8257 The number of bytes read may be less than LEN without indicating an
8258 EOF. PACKET is checked and updated to indicate whether the remote
8259 target supports this object. */
8262 remote_read_qxfer (struct target_ops *ops, const char *object_name,
8264 gdb_byte *readbuf, ULONGEST offset, LONGEST len,
8265 struct packet_config *packet)
8267 static char *finished_object;
8268 static char *finished_annex;
8269 static ULONGEST finished_offset;
8271 struct remote_state *rs = get_remote_state ();
8272 LONGEST i, n, packet_len;
8274 if (packet->support == PACKET_DISABLE)
8277 /* Check whether we've cached an end-of-object packet that matches
8279 if (finished_object)
8281 if (strcmp (object_name, finished_object) == 0
8282 && strcmp (annex ? annex : "", finished_annex) == 0
8283 && offset == finished_offset)
8286 /* Otherwise, we're now reading something different. Discard
8288 xfree (finished_object);
8289 xfree (finished_annex);
8290 finished_object = NULL;
8291 finished_annex = NULL;
8294 /* Request only enough to fit in a single packet. The actual data
8295 may not, since we don't know how much of it will need to be escaped;
8296 the target is free to respond with slightly less data. We subtract
8297 five to account for the response type and the protocol frame. */
8298 n = min (get_remote_packet_size () - 5, len);
8299 snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
8300 object_name, annex ? annex : "",
8301 phex_nz (offset, sizeof offset),
8302 phex_nz (n, sizeof n));
8303 i = putpkt (rs->buf);
8308 packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0);
8309 if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK)
8312 if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
8313 error (_("Unknown remote qXfer reply: %s"), rs->buf);
8315 /* 'm' means there is (or at least might be) more data after this
8316 batch. That does not make sense unless there's at least one byte
8317 of data in this reply. */
8318 if (rs->buf[0] == 'm' && packet_len == 1)
8319 error (_("Remote qXfer reply contained no data."));
8321 /* Got some data. */
8322 i = remote_unescape_input (rs->buf + 1, packet_len - 1, readbuf, n);
8324 /* 'l' is an EOF marker, possibly including a final block of data,
8325 or possibly empty. If we have the final block of a non-empty
8326 object, record this fact to bypass a subsequent partial read. */
8327 if (rs->buf[0] == 'l' && offset + i > 0)
8329 finished_object = xstrdup (object_name);
8330 finished_annex = xstrdup (annex ? annex : "");
8331 finished_offset = offset + i;
8338 remote_xfer_partial (struct target_ops *ops, enum target_object object,
8339 const char *annex, gdb_byte *readbuf,
8340 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
8342 struct remote_state *rs;
8347 set_remote_traceframe ();
8348 set_general_thread (inferior_ptid);
8350 rs = get_remote_state ();
8352 /* Handle memory using the standard memory routines. */
8353 if (object == TARGET_OBJECT_MEMORY)
8359 /* If the remote target is connected but not running, we should
8360 pass this request down to a lower stratum (e.g. the executable
8362 if (!target_has_execution)
8365 if (writebuf != NULL)
8366 xfered = remote_write_bytes (offset, writebuf, len);
8368 xfered = remote_read_bytes (offset, readbuf, len);
8372 else if (xfered == 0 && errno == 0)
8378 /* Handle SPU memory using qxfer packets. */
8379 if (object == TARGET_OBJECT_SPU)
8382 return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len,
8383 &remote_protocol_packets
8384 [PACKET_qXfer_spu_read]);
8386 return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len,
8387 &remote_protocol_packets
8388 [PACKET_qXfer_spu_write]);
8391 /* Handle extra signal info using qxfer packets. */
8392 if (object == TARGET_OBJECT_SIGNAL_INFO)
8395 return remote_read_qxfer (ops, "siginfo", annex, readbuf, offset, len,
8396 &remote_protocol_packets
8397 [PACKET_qXfer_siginfo_read]);
8399 return remote_write_qxfer (ops, "siginfo", annex,
8400 writebuf, offset, len,
8401 &remote_protocol_packets
8402 [PACKET_qXfer_siginfo_write]);
8405 if (object == TARGET_OBJECT_STATIC_TRACE_DATA)
8408 return remote_read_qxfer (ops, "statictrace", annex,
8409 readbuf, offset, len,
8410 &remote_protocol_packets
8411 [PACKET_qXfer_statictrace_read]);
8416 /* Only handle flash writes. */
8417 if (writebuf != NULL)
8423 case TARGET_OBJECT_FLASH:
8424 xfered = remote_flash_write (ops, offset, len, writebuf);
8428 else if (xfered == 0 && errno == 0)
8438 /* Map pre-existing objects onto letters. DO NOT do this for new
8439 objects!!! Instead specify new query packets. */
8442 case TARGET_OBJECT_AVR:
8446 case TARGET_OBJECT_AUXV:
8447 gdb_assert (annex == NULL);
8448 return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len,
8449 &remote_protocol_packets[PACKET_qXfer_auxv]);
8451 case TARGET_OBJECT_AVAILABLE_FEATURES:
8452 return remote_read_qxfer
8453 (ops, "features", annex, readbuf, offset, len,
8454 &remote_protocol_packets[PACKET_qXfer_features]);
8456 case TARGET_OBJECT_LIBRARIES:
8457 return remote_read_qxfer
8458 (ops, "libraries", annex, readbuf, offset, len,
8459 &remote_protocol_packets[PACKET_qXfer_libraries]);
8461 case TARGET_OBJECT_LIBRARIES_SVR4:
8462 return remote_read_qxfer
8463 (ops, "libraries-svr4", annex, readbuf, offset, len,
8464 &remote_protocol_packets[PACKET_qXfer_libraries_svr4]);
8466 case TARGET_OBJECT_MEMORY_MAP:
8467 gdb_assert (annex == NULL);
8468 return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len,
8469 &remote_protocol_packets[PACKET_qXfer_memory_map]);
8471 case TARGET_OBJECT_OSDATA:
8472 /* Should only get here if we're connected. */
8473 gdb_assert (remote_desc);
8474 return remote_read_qxfer
8475 (ops, "osdata", annex, readbuf, offset, len,
8476 &remote_protocol_packets[PACKET_qXfer_osdata]);
8478 case TARGET_OBJECT_THREADS:
8479 gdb_assert (annex == NULL);
8480 return remote_read_qxfer (ops, "threads", annex, readbuf, offset, len,
8481 &remote_protocol_packets[PACKET_qXfer_threads]);
8483 case TARGET_OBJECT_TRACEFRAME_INFO:
8484 gdb_assert (annex == NULL);
8485 return remote_read_qxfer
8486 (ops, "traceframe-info", annex, readbuf, offset, len,
8487 &remote_protocol_packets[PACKET_qXfer_traceframe_info]);
8489 case TARGET_OBJECT_FDPIC:
8490 return remote_read_qxfer (ops, "fdpic", annex, readbuf, offset, len,
8491 &remote_protocol_packets[PACKET_qXfer_fdpic]);
8496 /* Note: a zero OFFSET and LEN can be used to query the minimum
8498 if (offset == 0 && len == 0)
8499 return (get_remote_packet_size ());
8500 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
8501 large enough let the caller deal with it. */
8502 if (len < get_remote_packet_size ())
8504 len = get_remote_packet_size ();
8506 /* Except for querying the minimum buffer size, target must be open. */
8508 error (_("remote query is only available after target open"));
8510 gdb_assert (annex != NULL);
8511 gdb_assert (readbuf != NULL);
8517 /* We used one buffer char for the remote protocol q command and
8518 another for the query type. As the remote protocol encapsulation
8519 uses 4 chars plus one extra in case we are debugging
8520 (remote_debug), we have PBUFZIZ - 7 left to pack the query
8523 while (annex[i] && (i < (get_remote_packet_size () - 8)))
8525 /* Bad caller may have sent forbidden characters. */
8526 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
8531 gdb_assert (annex[i] == '\0');
8533 i = putpkt (rs->buf);
8537 getpkt (&rs->buf, &rs->buf_size, 0);
8538 strcpy ((char *) readbuf, rs->buf);
8540 return strlen ((char *) readbuf);
8544 remote_search_memory (struct target_ops* ops,
8545 CORE_ADDR start_addr, ULONGEST search_space_len,
8546 const gdb_byte *pattern, ULONGEST pattern_len,
8547 CORE_ADDR *found_addrp)
8549 int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
8550 struct remote_state *rs = get_remote_state ();
8551 int max_size = get_memory_write_packet_size ();
8552 struct packet_config *packet =
8553 &remote_protocol_packets[PACKET_qSearch_memory];
8554 /* Number of packet bytes used to encode the pattern;
8555 this could be more than PATTERN_LEN due to escape characters. */
8556 int escaped_pattern_len;
8557 /* Amount of pattern that was encodable in the packet. */
8558 int used_pattern_len;
8561 ULONGEST found_addr;
8563 /* Don't go to the target if we don't have to.
8564 This is done before checking packet->support to avoid the possibility that
8565 a success for this edge case means the facility works in general. */
8566 if (pattern_len > search_space_len)
8568 if (pattern_len == 0)
8570 *found_addrp = start_addr;
8574 /* If we already know the packet isn't supported, fall back to the simple
8575 way of searching memory. */
8577 if (packet->support == PACKET_DISABLE)
8579 /* Target doesn't provided special support, fall back and use the
8580 standard support (copy memory and do the search here). */
8581 return simple_search_memory (ops, start_addr, search_space_len,
8582 pattern, pattern_len, found_addrp);
8585 /* Insert header. */
8586 i = snprintf (rs->buf, max_size,
8587 "qSearch:memory:%s;%s;",
8588 phex_nz (start_addr, addr_size),
8589 phex_nz (search_space_len, sizeof (search_space_len)));
8590 max_size -= (i + 1);
8592 /* Escape as much data as fits into rs->buf. */
8593 escaped_pattern_len =
8594 remote_escape_output (pattern, pattern_len, (rs->buf + i),
8595 &used_pattern_len, max_size);
8597 /* Bail if the pattern is too large. */
8598 if (used_pattern_len != pattern_len)
8599 error (_("Pattern is too large to transmit to remote target."));
8601 if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0
8602 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
8603 || packet_ok (rs->buf, packet) != PACKET_OK)
8605 /* The request may not have worked because the command is not
8606 supported. If so, fall back to the simple way. */
8607 if (packet->support == PACKET_DISABLE)
8609 return simple_search_memory (ops, start_addr, search_space_len,
8610 pattern, pattern_len, found_addrp);
8615 if (rs->buf[0] == '0')
8617 else if (rs->buf[0] == '1')
8620 if (rs->buf[1] != ',')
8621 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
8622 unpack_varlen_hex (rs->buf + 2, &found_addr);
8623 *found_addrp = found_addr;
8626 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
8632 remote_rcmd (char *command,
8633 struct ui_file *outbuf)
8635 struct remote_state *rs = get_remote_state ();
8639 error (_("remote rcmd is only available after target open"));
8641 /* Send a NULL command across as an empty command. */
8642 if (command == NULL)
8645 /* The query prefix. */
8646 strcpy (rs->buf, "qRcmd,");
8647 p = strchr (rs->buf, '\0');
8649 if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/)
8650 > get_remote_packet_size ())
8651 error (_("\"monitor\" command ``%s'' is too long."), command);
8653 /* Encode the actual command. */
8654 bin2hex ((gdb_byte *) command, p, 0);
8656 if (putpkt (rs->buf) < 0)
8657 error (_("Communication problem with target."));
8659 /* get/display the response */
8664 /* XXX - see also remote_get_noisy_reply(). */
8665 QUIT; /* Allow user to bail out with ^C. */
8667 if (getpkt_sane (&rs->buf, &rs->buf_size, 0) == -1)
8669 /* Timeout. Continue to (try to) read responses.
8670 This is better than stopping with an error, assuming the stub
8671 is still executing the (long) monitor command.
8672 If needed, the user can interrupt gdb using C-c, obtaining
8673 an effect similar to stop on timeout. */
8678 error (_("Target does not support this command."));
8679 if (buf[0] == 'O' && buf[1] != 'K')
8681 remote_console_output (buf + 1); /* 'O' message from stub. */
8684 if (strcmp (buf, "OK") == 0)
8686 if (strlen (buf) == 3 && buf[0] == 'E'
8687 && isdigit (buf[1]) && isdigit (buf[2]))
8689 error (_("Protocol error with Rcmd"));
8691 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
8693 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
8695 fputc_unfiltered (c, outbuf);
8701 static VEC(mem_region_s) *
8702 remote_memory_map (struct target_ops *ops)
8704 VEC(mem_region_s) *result = NULL;
8705 char *text = target_read_stralloc (¤t_target,
8706 TARGET_OBJECT_MEMORY_MAP, NULL);
8710 struct cleanup *back_to = make_cleanup (xfree, text);
8712 result = parse_memory_map (text);
8713 do_cleanups (back_to);
8720 packet_command (char *args, int from_tty)
8722 struct remote_state *rs = get_remote_state ();
8725 error (_("command can only be used with remote target"));
8728 error (_("remote-packet command requires packet text as argument"));
8730 puts_filtered ("sending: ");
8731 print_packet (args);
8732 puts_filtered ("\n");
8735 getpkt (&rs->buf, &rs->buf_size, 0);
8736 puts_filtered ("received: ");
8737 print_packet (rs->buf);
8738 puts_filtered ("\n");
8742 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
8744 static void display_thread_info (struct gdb_ext_thread_info *info);
8746 static void threadset_test_cmd (char *cmd, int tty);
8748 static void threadalive_test (char *cmd, int tty);
8750 static void threadlist_test_cmd (char *cmd, int tty);
8752 int get_and_display_threadinfo (threadref *ref);
8754 static void threadinfo_test_cmd (char *cmd, int tty);
8756 static int thread_display_step (threadref *ref, void *context);
8758 static void threadlist_update_test_cmd (char *cmd, int tty);
8760 static void init_remote_threadtests (void);
8762 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
8765 threadset_test_cmd (char *cmd, int tty)
8767 int sample_thread = SAMPLE_THREAD;
8769 printf_filtered (_("Remote threadset test\n"));
8770 set_general_thread (sample_thread);
8775 threadalive_test (char *cmd, int tty)
8777 int sample_thread = SAMPLE_THREAD;
8778 int pid = ptid_get_pid (inferior_ptid);
8779 ptid_t ptid = ptid_build (pid, 0, sample_thread);
8781 if (remote_thread_alive (ptid))
8782 printf_filtered ("PASS: Thread alive test\n");
8784 printf_filtered ("FAIL: Thread alive test\n");
8787 void output_threadid (char *title, threadref *ref);
8790 output_threadid (char *title, threadref *ref)
8794 pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
8796 printf_filtered ("%s %s\n", title, (&hexid[0]));
8800 threadlist_test_cmd (char *cmd, int tty)
8803 threadref nextthread;
8804 int done, result_count;
8805 threadref threadlist[3];
8807 printf_filtered ("Remote Threadlist test\n");
8808 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
8809 &result_count, &threadlist[0]))
8810 printf_filtered ("FAIL: threadlist test\n");
8813 threadref *scan = threadlist;
8814 threadref *limit = scan + result_count;
8816 while (scan < limit)
8817 output_threadid (" thread ", scan++);
8822 display_thread_info (struct gdb_ext_thread_info *info)
8824 output_threadid ("Threadid: ", &info->threadid);
8825 printf_filtered ("Name: %s\n ", info->shortname);
8826 printf_filtered ("State: %s\n", info->display);
8827 printf_filtered ("other: %s\n\n", info->more_display);
8831 get_and_display_threadinfo (threadref *ref)
8835 struct gdb_ext_thread_info threadinfo;
8837 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
8838 | TAG_MOREDISPLAY | TAG_DISPLAY;
8839 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
8840 display_thread_info (&threadinfo);
8845 threadinfo_test_cmd (char *cmd, int tty)
8847 int athread = SAMPLE_THREAD;
8851 int_to_threadref (&thread, athread);
8852 printf_filtered ("Remote Threadinfo test\n");
8853 if (!get_and_display_threadinfo (&thread))
8854 printf_filtered ("FAIL cannot get thread info\n");
8858 thread_display_step (threadref *ref, void *context)
8860 /* output_threadid(" threadstep ",ref); *//* simple test */
8861 return get_and_display_threadinfo (ref);
8865 threadlist_update_test_cmd (char *cmd, int tty)
8867 printf_filtered ("Remote Threadlist update test\n");
8868 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
8872 init_remote_threadtests (void)
8874 add_com ("tlist", class_obscure, threadlist_test_cmd,
8875 _("Fetch and print the remote list of "
8876 "thread identifiers, one pkt only"));
8877 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
8878 _("Fetch and display info about one thread"));
8879 add_com ("tset", class_obscure, threadset_test_cmd,
8880 _("Test setting to a different thread"));
8881 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
8882 _("Iterate through updating all remote thread info"));
8883 add_com ("talive", class_obscure, threadalive_test,
8884 _(" Remote thread alive test "));
8889 /* Convert a thread ID to a string. Returns the string in a static
8893 remote_pid_to_str (struct target_ops *ops, ptid_t ptid)
8895 static char buf[64];
8896 struct remote_state *rs = get_remote_state ();
8898 if (ptid_equal (ptid, null_ptid))
8899 return normal_pid_to_str (ptid);
8900 else if (ptid_is_pid (ptid))
8902 /* Printing an inferior target id. */
8904 /* When multi-process extensions are off, there's no way in the
8905 remote protocol to know the remote process id, if there's any
8906 at all. There's one exception --- when we're connected with
8907 target extended-remote, and we manually attached to a process
8908 with "attach PID". We don't record anywhere a flag that
8909 allows us to distinguish that case from the case of
8910 connecting with extended-remote and the stub already being
8911 attached to a process, and reporting yes to qAttached, hence
8912 no smart special casing here. */
8913 if (!remote_multi_process_p (rs))
8915 xsnprintf (buf, sizeof buf, "Remote target");
8919 return normal_pid_to_str (ptid);
8923 if (ptid_equal (magic_null_ptid, ptid))
8924 xsnprintf (buf, sizeof buf, "Thread <main>");
8925 else if (rs->extended && remote_multi_process_p (rs))
8926 xsnprintf (buf, sizeof buf, "Thread %d.%ld",
8927 ptid_get_pid (ptid), ptid_get_tid (ptid));
8929 xsnprintf (buf, sizeof buf, "Thread %ld",
8930 ptid_get_tid (ptid));
8935 /* Get the address of the thread local variable in OBJFILE which is
8936 stored at OFFSET within the thread local storage for thread PTID. */
8939 remote_get_thread_local_address (struct target_ops *ops,
8940 ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset)
8942 if (remote_protocol_packets[PACKET_qGetTLSAddr].support != PACKET_DISABLE)
8944 struct remote_state *rs = get_remote_state ();
8946 char *endp = rs->buf + get_remote_packet_size ();
8947 enum packet_result result;
8949 strcpy (p, "qGetTLSAddr:");
8951 p = write_ptid (p, endp, ptid);
8953 p += hexnumstr (p, offset);
8955 p += hexnumstr (p, lm);
8959 getpkt (&rs->buf, &rs->buf_size, 0);
8960 result = packet_ok (rs->buf,
8961 &remote_protocol_packets[PACKET_qGetTLSAddr]);
8962 if (result == PACKET_OK)
8966 unpack_varlen_hex (rs->buf, &result);
8969 else if (result == PACKET_UNKNOWN)
8970 throw_error (TLS_GENERIC_ERROR,
8971 _("Remote target doesn't support qGetTLSAddr packet"));
8973 throw_error (TLS_GENERIC_ERROR,
8974 _("Remote target failed to process qGetTLSAddr request"));
8977 throw_error (TLS_GENERIC_ERROR,
8978 _("TLS not supported or disabled on this target"));
8983 /* Provide thread local base, i.e. Thread Information Block address.
8984 Returns 1 if ptid is found and thread_local_base is non zero. */
8987 remote_get_tib_address (ptid_t ptid, CORE_ADDR *addr)
8989 if (remote_protocol_packets[PACKET_qGetTIBAddr].support != PACKET_DISABLE)
8991 struct remote_state *rs = get_remote_state ();
8993 char *endp = rs->buf + get_remote_packet_size ();
8994 enum packet_result result;
8996 strcpy (p, "qGetTIBAddr:");
8998 p = write_ptid (p, endp, ptid);
9002 getpkt (&rs->buf, &rs->buf_size, 0);
9003 result = packet_ok (rs->buf,
9004 &remote_protocol_packets[PACKET_qGetTIBAddr]);
9005 if (result == PACKET_OK)
9009 unpack_varlen_hex (rs->buf, &result);
9011 *addr = (CORE_ADDR) result;
9014 else if (result == PACKET_UNKNOWN)
9015 error (_("Remote target doesn't support qGetTIBAddr packet"));
9017 error (_("Remote target failed to process qGetTIBAddr request"));
9020 error (_("qGetTIBAddr not supported or disabled on this target"));
9025 /* Support for inferring a target description based on the current
9026 architecture and the size of a 'g' packet. While the 'g' packet
9027 can have any size (since optional registers can be left off the
9028 end), some sizes are easily recognizable given knowledge of the
9029 approximate architecture. */
9031 struct remote_g_packet_guess
9034 const struct target_desc *tdesc;
9036 typedef struct remote_g_packet_guess remote_g_packet_guess_s;
9037 DEF_VEC_O(remote_g_packet_guess_s);
9039 struct remote_g_packet_data
9041 VEC(remote_g_packet_guess_s) *guesses;
9044 static struct gdbarch_data *remote_g_packet_data_handle;
9047 remote_g_packet_data_init (struct obstack *obstack)
9049 return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data);
9053 register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
9054 const struct target_desc *tdesc)
9056 struct remote_g_packet_data *data
9057 = gdbarch_data (gdbarch, remote_g_packet_data_handle);
9058 struct remote_g_packet_guess new_guess, *guess;
9061 gdb_assert (tdesc != NULL);
9064 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
9066 if (guess->bytes == bytes)
9067 internal_error (__FILE__, __LINE__,
9068 _("Duplicate g packet description added for size %d"),
9071 new_guess.bytes = bytes;
9072 new_guess.tdesc = tdesc;
9073 VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess);
9076 /* Return 1 if remote_read_description would do anything on this target
9077 and architecture, 0 otherwise. */
9080 remote_read_description_p (struct target_ops *target)
9082 struct remote_g_packet_data *data
9083 = gdbarch_data (target_gdbarch, remote_g_packet_data_handle);
9085 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
9091 static const struct target_desc *
9092 remote_read_description (struct target_ops *target)
9094 struct remote_g_packet_data *data
9095 = gdbarch_data (target_gdbarch, remote_g_packet_data_handle);
9097 /* Do not try this during initial connection, when we do not know
9098 whether there is a running but stopped thread. */
9099 if (!target_has_execution || ptid_equal (inferior_ptid, null_ptid))
9102 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
9104 struct remote_g_packet_guess *guess;
9106 int bytes = send_g_packet ();
9109 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
9111 if (guess->bytes == bytes)
9112 return guess->tdesc;
9114 /* We discard the g packet. A minor optimization would be to
9115 hold on to it, and fill the register cache once we have selected
9116 an architecture, but it's too tricky to do safely. */
9122 /* Remote file transfer support. This is host-initiated I/O, not
9123 target-initiated; for target-initiated, see remote-fileio.c. */
9125 /* If *LEFT is at least the length of STRING, copy STRING to
9126 *BUFFER, update *BUFFER to point to the new end of the buffer, and
9127 decrease *LEFT. Otherwise raise an error. */
9130 remote_buffer_add_string (char **buffer, int *left, char *string)
9132 int len = strlen (string);
9135 error (_("Packet too long for target."));
9137 memcpy (*buffer, string, len);
9141 /* NUL-terminate the buffer as a convenience, if there is
9147 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
9148 *BUFFER, update *BUFFER to point to the new end of the buffer, and
9149 decrease *LEFT. Otherwise raise an error. */
9152 remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
9155 if (2 * len > *left)
9156 error (_("Packet too long for target."));
9158 bin2hex (bytes, *buffer, len);
9162 /* NUL-terminate the buffer as a convenience, if there is
9168 /* If *LEFT is large enough, convert VALUE to hex and add it to
9169 *BUFFER, update *BUFFER to point to the new end of the buffer, and
9170 decrease *LEFT. Otherwise raise an error. */
9173 remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
9175 int len = hexnumlen (value);
9178 error (_("Packet too long for target."));
9180 hexnumstr (*buffer, value);
9184 /* NUL-terminate the buffer as a convenience, if there is
9190 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
9191 value, *REMOTE_ERRNO to the remote error number or zero if none
9192 was included, and *ATTACHMENT to point to the start of the annex
9193 if any. The length of the packet isn't needed here; there may
9194 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
9196 Return 0 if the packet could be parsed, -1 if it could not. If
9197 -1 is returned, the other variables may not be initialized. */
9200 remote_hostio_parse_result (char *buffer, int *retcode,
9201 int *remote_errno, char **attachment)
9208 if (buffer[0] != 'F')
9212 *retcode = strtol (&buffer[1], &p, 16);
9213 if (errno != 0 || p == &buffer[1])
9216 /* Check for ",errno". */
9220 *remote_errno = strtol (p + 1, &p2, 16);
9221 if (errno != 0 || p + 1 == p2)
9226 /* Check for ";attachment". If there is no attachment, the
9227 packet should end here. */
9230 *attachment = p + 1;
9233 else if (*p == '\0')
9239 /* Send a prepared I/O packet to the target and read its response.
9240 The prepared packet is in the global RS->BUF before this function
9241 is called, and the answer is there when we return.
9243 COMMAND_BYTES is the length of the request to send, which may include
9244 binary data. WHICH_PACKET is the packet configuration to check
9245 before attempting a packet. If an error occurs, *REMOTE_ERRNO
9246 is set to the error number and -1 is returned. Otherwise the value
9247 returned by the function is returned.
9249 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
9250 attachment is expected; an error will be reported if there's a
9251 mismatch. If one is found, *ATTACHMENT will be set to point into
9252 the packet buffer and *ATTACHMENT_LEN will be set to the
9253 attachment's length. */
9256 remote_hostio_send_command (int command_bytes, int which_packet,
9257 int *remote_errno, char **attachment,
9258 int *attachment_len)
9260 struct remote_state *rs = get_remote_state ();
9261 int ret, bytes_read;
9262 char *attachment_tmp;
9265 || remote_protocol_packets[which_packet].support == PACKET_DISABLE)
9267 *remote_errno = FILEIO_ENOSYS;
9271 putpkt_binary (rs->buf, command_bytes);
9272 bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0);
9274 /* If it timed out, something is wrong. Don't try to parse the
9278 *remote_errno = FILEIO_EINVAL;
9282 switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
9285 *remote_errno = FILEIO_EINVAL;
9287 case PACKET_UNKNOWN:
9288 *remote_errno = FILEIO_ENOSYS;
9294 if (remote_hostio_parse_result (rs->buf, &ret, remote_errno,
9297 *remote_errno = FILEIO_EINVAL;
9301 /* Make sure we saw an attachment if and only if we expected one. */
9302 if ((attachment_tmp == NULL && attachment != NULL)
9303 || (attachment_tmp != NULL && attachment == NULL))
9305 *remote_errno = FILEIO_EINVAL;
9309 /* If an attachment was found, it must point into the packet buffer;
9310 work out how many bytes there were. */
9311 if (attachment_tmp != NULL)
9313 *attachment = attachment_tmp;
9314 *attachment_len = bytes_read - (*attachment - rs->buf);
9320 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
9321 remote file descriptor, or -1 if an error occurs (and set
9325 remote_hostio_open (const char *filename, int flags, int mode,
9328 struct remote_state *rs = get_remote_state ();
9330 int left = get_remote_packet_size () - 1;
9332 remote_buffer_add_string (&p, &left, "vFile:open:");
9334 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
9336 remote_buffer_add_string (&p, &left, ",");
9338 remote_buffer_add_int (&p, &left, flags);
9339 remote_buffer_add_string (&p, &left, ",");
9341 remote_buffer_add_int (&p, &left, mode);
9343 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open,
9344 remote_errno, NULL, NULL);
9347 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
9348 Return the number of bytes written, or -1 if an error occurs (and
9349 set *REMOTE_ERRNO). */
9352 remote_hostio_pwrite (int fd, const gdb_byte *write_buf, int len,
9353 ULONGEST offset, int *remote_errno)
9355 struct remote_state *rs = get_remote_state ();
9357 int left = get_remote_packet_size ();
9360 remote_buffer_add_string (&p, &left, "vFile:pwrite:");
9362 remote_buffer_add_int (&p, &left, fd);
9363 remote_buffer_add_string (&p, &left, ",");
9365 remote_buffer_add_int (&p, &left, offset);
9366 remote_buffer_add_string (&p, &left, ",");
9368 p += remote_escape_output (write_buf, len, p, &out_len,
9369 get_remote_packet_size () - (p - rs->buf));
9371 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite,
9372 remote_errno, NULL, NULL);
9375 /* Read up to LEN bytes FD on the remote target into READ_BUF
9376 Return the number of bytes read, or -1 if an error occurs (and
9377 set *REMOTE_ERRNO). */
9380 remote_hostio_pread (int fd, gdb_byte *read_buf, int len,
9381 ULONGEST offset, int *remote_errno)
9383 struct remote_state *rs = get_remote_state ();
9386 int left = get_remote_packet_size ();
9387 int ret, attachment_len;
9390 remote_buffer_add_string (&p, &left, "vFile:pread:");
9392 remote_buffer_add_int (&p, &left, fd);
9393 remote_buffer_add_string (&p, &left, ",");
9395 remote_buffer_add_int (&p, &left, len);
9396 remote_buffer_add_string (&p, &left, ",");
9398 remote_buffer_add_int (&p, &left, offset);
9400 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread,
9401 remote_errno, &attachment,
9407 read_len = remote_unescape_input (attachment, attachment_len,
9409 if (read_len != ret)
9410 error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
9415 /* Close FD on the remote target. Return 0, or -1 if an error occurs
9416 (and set *REMOTE_ERRNO). */
9419 remote_hostio_close (int fd, int *remote_errno)
9421 struct remote_state *rs = get_remote_state ();
9423 int left = get_remote_packet_size () - 1;
9425 remote_buffer_add_string (&p, &left, "vFile:close:");
9427 remote_buffer_add_int (&p, &left, fd);
9429 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close,
9430 remote_errno, NULL, NULL);
9433 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
9434 occurs (and set *REMOTE_ERRNO). */
9437 remote_hostio_unlink (const char *filename, int *remote_errno)
9439 struct remote_state *rs = get_remote_state ();
9441 int left = get_remote_packet_size () - 1;
9443 remote_buffer_add_string (&p, &left, "vFile:unlink:");
9445 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
9448 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink,
9449 remote_errno, NULL, NULL);
9452 /* Read value of symbolic link FILENAME on the remote target. Return
9453 a null-terminated string allocated via xmalloc, or NULL if an error
9454 occurs (and set *REMOTE_ERRNO). */
9457 remote_hostio_readlink (const char *filename, int *remote_errno)
9459 struct remote_state *rs = get_remote_state ();
9462 int left = get_remote_packet_size ();
9463 int len, attachment_len;
9467 remote_buffer_add_string (&p, &left, "vFile:readlink:");
9469 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
9472 len = remote_hostio_send_command (p - rs->buf, PACKET_vFile_readlink,
9473 remote_errno, &attachment,
9479 ret = xmalloc (len + 1);
9481 read_len = remote_unescape_input (attachment, attachment_len,
9483 if (read_len != len)
9484 error (_("Readlink returned %d, but %d bytes."), len, read_len);
9491 remote_fileio_errno_to_host (int errnum)
9515 case FILEIO_ENOTDIR:
9535 case FILEIO_ENAMETOOLONG:
9536 return ENAMETOOLONG;
9542 remote_hostio_error (int errnum)
9544 int host_error = remote_fileio_errno_to_host (errnum);
9546 if (host_error == -1)
9547 error (_("Unknown remote I/O error %d"), errnum);
9549 error (_("Remote I/O error: %s"), safe_strerror (host_error));
9553 remote_hostio_close_cleanup (void *opaque)
9555 int fd = *(int *) opaque;
9558 remote_hostio_close (fd, &remote_errno);
9563 remote_bfd_iovec_open (struct bfd *abfd, void *open_closure)
9565 const char *filename = bfd_get_filename (abfd);
9566 int fd, remote_errno;
9569 gdb_assert (remote_filename_p (filename));
9571 fd = remote_hostio_open (filename + 7, FILEIO_O_RDONLY, 0, &remote_errno);
9574 errno = remote_fileio_errno_to_host (remote_errno);
9575 bfd_set_error (bfd_error_system_call);
9579 stream = xmalloc (sizeof (int));
9585 remote_bfd_iovec_close (struct bfd *abfd, void *stream)
9587 int fd = *(int *)stream;
9592 /* Ignore errors on close; these may happen if the remote
9593 connection was already torn down. */
9594 remote_hostio_close (fd, &remote_errno);
9600 remote_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf,
9601 file_ptr nbytes, file_ptr offset)
9603 int fd = *(int *)stream;
9605 file_ptr pos, bytes;
9608 while (nbytes > pos)
9610 bytes = remote_hostio_pread (fd, (char *)buf + pos, nbytes - pos,
9611 offset + pos, &remote_errno);
9613 /* Success, but no bytes, means end-of-file. */
9617 errno = remote_fileio_errno_to_host (remote_errno);
9618 bfd_set_error (bfd_error_system_call);
9629 remote_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb)
9631 /* FIXME: We should probably implement remote_hostio_stat. */
9632 sb->st_size = INT_MAX;
9637 remote_filename_p (const char *filename)
9639 return strncmp (filename, "remote:", 7) == 0;
9643 remote_bfd_open (const char *remote_file, const char *target)
9645 return bfd_openr_iovec (remote_file, target,
9646 remote_bfd_iovec_open, NULL,
9647 remote_bfd_iovec_pread,
9648 remote_bfd_iovec_close,
9649 remote_bfd_iovec_stat);
9653 remote_file_put (const char *local_file, const char *remote_file, int from_tty)
9655 struct cleanup *back_to, *close_cleanup;
9656 int retcode, fd, remote_errno, bytes, io_size;
9659 int bytes_in_buffer;
9664 error (_("command can only be used with remote target"));
9666 file = fopen (local_file, "rb");
9668 perror_with_name (local_file);
9669 back_to = make_cleanup_fclose (file);
9671 fd = remote_hostio_open (remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
9673 0700, &remote_errno);
9675 remote_hostio_error (remote_errno);
9677 /* Send up to this many bytes at once. They won't all fit in the
9678 remote packet limit, so we'll transfer slightly fewer. */
9679 io_size = get_remote_packet_size ();
9680 buffer = xmalloc (io_size);
9681 make_cleanup (xfree, buffer);
9683 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
9685 bytes_in_buffer = 0;
9688 while (bytes_in_buffer || !saw_eof)
9692 bytes = fread (buffer + bytes_in_buffer, 1,
9693 io_size - bytes_in_buffer,
9698 error (_("Error reading %s."), local_file);
9701 /* EOF. Unless there is something still in the
9702 buffer from the last iteration, we are done. */
9704 if (bytes_in_buffer == 0)
9712 bytes += bytes_in_buffer;
9713 bytes_in_buffer = 0;
9715 retcode = remote_hostio_pwrite (fd, buffer, bytes,
9716 offset, &remote_errno);
9719 remote_hostio_error (remote_errno);
9720 else if (retcode == 0)
9721 error (_("Remote write of %d bytes returned 0!"), bytes);
9722 else if (retcode < bytes)
9724 /* Short write. Save the rest of the read data for the next
9726 bytes_in_buffer = bytes - retcode;
9727 memmove (buffer, buffer + retcode, bytes_in_buffer);
9733 discard_cleanups (close_cleanup);
9734 if (remote_hostio_close (fd, &remote_errno))
9735 remote_hostio_error (remote_errno);
9738 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
9739 do_cleanups (back_to);
9743 remote_file_get (const char *remote_file, const char *local_file, int from_tty)
9745 struct cleanup *back_to, *close_cleanup;
9746 int fd, remote_errno, bytes, io_size;
9752 error (_("command can only be used with remote target"));
9754 fd = remote_hostio_open (remote_file, FILEIO_O_RDONLY, 0, &remote_errno);
9756 remote_hostio_error (remote_errno);
9758 file = fopen (local_file, "wb");
9760 perror_with_name (local_file);
9761 back_to = make_cleanup_fclose (file);
9763 /* Send up to this many bytes at once. They won't all fit in the
9764 remote packet limit, so we'll transfer slightly fewer. */
9765 io_size = get_remote_packet_size ();
9766 buffer = xmalloc (io_size);
9767 make_cleanup (xfree, buffer);
9769 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
9774 bytes = remote_hostio_pread (fd, buffer, io_size, offset, &remote_errno);
9776 /* Success, but no bytes, means end-of-file. */
9779 remote_hostio_error (remote_errno);
9783 bytes = fwrite (buffer, 1, bytes, file);
9785 perror_with_name (local_file);
9788 discard_cleanups (close_cleanup);
9789 if (remote_hostio_close (fd, &remote_errno))
9790 remote_hostio_error (remote_errno);
9793 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
9794 do_cleanups (back_to);
9798 remote_file_delete (const char *remote_file, int from_tty)
9800 int retcode, remote_errno;
9803 error (_("command can only be used with remote target"));
9805 retcode = remote_hostio_unlink (remote_file, &remote_errno);
9807 remote_hostio_error (remote_errno);
9810 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
9814 remote_put_command (char *args, int from_tty)
9816 struct cleanup *back_to;
9820 error_no_arg (_("file to put"));
9822 argv = gdb_buildargv (args);
9823 back_to = make_cleanup_freeargv (argv);
9824 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
9825 error (_("Invalid parameters to remote put"));
9827 remote_file_put (argv[0], argv[1], from_tty);
9829 do_cleanups (back_to);
9833 remote_get_command (char *args, int from_tty)
9835 struct cleanup *back_to;
9839 error_no_arg (_("file to get"));
9841 argv = gdb_buildargv (args);
9842 back_to = make_cleanup_freeargv (argv);
9843 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
9844 error (_("Invalid parameters to remote get"));
9846 remote_file_get (argv[0], argv[1], from_tty);
9848 do_cleanups (back_to);
9852 remote_delete_command (char *args, int from_tty)
9854 struct cleanup *back_to;
9858 error_no_arg (_("file to delete"));
9860 argv = gdb_buildargv (args);
9861 back_to = make_cleanup_freeargv (argv);
9862 if (argv[0] == NULL || argv[1] != NULL)
9863 error (_("Invalid parameters to remote delete"));
9865 remote_file_delete (argv[0], from_tty);
9867 do_cleanups (back_to);
9871 remote_command (char *args, int from_tty)
9873 help_list (remote_cmdlist, "remote ", -1, gdb_stdout);
9877 remote_can_execute_reverse (void)
9879 if (remote_protocol_packets[PACKET_bs].support == PACKET_ENABLE
9880 || remote_protocol_packets[PACKET_bc].support == PACKET_ENABLE)
9887 remote_supports_non_stop (void)
9893 remote_supports_disable_randomization (void)
9895 /* Only supported in extended mode. */
9900 remote_supports_multi_process (void)
9902 struct remote_state *rs = get_remote_state ();
9904 /* Only extended-remote handles being attached to multiple
9905 processes, even though plain remote can use the multi-process
9906 thread id extensions, so that GDB knows the target process's
9908 return rs->extended && remote_multi_process_p (rs);
9912 remote_supports_cond_tracepoints (void)
9914 struct remote_state *rs = get_remote_state ();
9916 return rs->cond_tracepoints;
9920 remote_supports_cond_breakpoints (void)
9922 struct remote_state *rs = get_remote_state ();
9924 return rs->cond_breakpoints;
9928 remote_supports_fast_tracepoints (void)
9930 struct remote_state *rs = get_remote_state ();
9932 return rs->fast_tracepoints;
9936 remote_supports_static_tracepoints (void)
9938 struct remote_state *rs = get_remote_state ();
9940 return rs->static_tracepoints;
9944 remote_supports_install_in_trace (void)
9946 struct remote_state *rs = get_remote_state ();
9948 return rs->install_in_trace;
9952 remote_supports_enable_disable_tracepoint (void)
9954 struct remote_state *rs = get_remote_state ();
9956 return rs->enable_disable_tracepoints;
9960 remote_supports_string_tracing (void)
9962 struct remote_state *rs = get_remote_state ();
9964 return rs->string_tracing;
9968 remote_trace_init (void)
9971 remote_get_noisy_reply (&target_buf, &target_buf_size);
9972 if (strcmp (target_buf, "OK") != 0)
9973 error (_("Target does not support this command."));
9976 static void free_actions_list (char **actions_list);
9977 static void free_actions_list_cleanup_wrapper (void *);
9979 free_actions_list_cleanup_wrapper (void *al)
9981 free_actions_list (al);
9985 free_actions_list (char **actions_list)
9989 if (actions_list == 0)
9992 for (ndx = 0; actions_list[ndx]; ndx++)
9993 xfree (actions_list[ndx]);
9995 xfree (actions_list);
9998 /* Recursive routine to walk through command list including loops, and
9999 download packets for each command. */
10002 remote_download_command_source (int num, ULONGEST addr,
10003 struct command_line *cmds)
10005 struct remote_state *rs = get_remote_state ();
10006 struct command_line *cmd;
10008 for (cmd = cmds; cmd; cmd = cmd->next)
10010 QUIT; /* Allow user to bail out with ^C. */
10011 strcpy (rs->buf, "QTDPsrc:");
10012 encode_source_string (num, addr, "cmd", cmd->line,
10013 rs->buf + strlen (rs->buf),
10014 rs->buf_size - strlen (rs->buf));
10016 remote_get_noisy_reply (&target_buf, &target_buf_size);
10017 if (strcmp (target_buf, "OK"))
10018 warning (_("Target does not support source download."));
10020 if (cmd->control_type == while_control
10021 || cmd->control_type == while_stepping_control)
10023 remote_download_command_source (num, addr, *cmd->body_list);
10025 QUIT; /* Allow user to bail out with ^C. */
10026 strcpy (rs->buf, "QTDPsrc:");
10027 encode_source_string (num, addr, "cmd", "end",
10028 rs->buf + strlen (rs->buf),
10029 rs->buf_size - strlen (rs->buf));
10031 remote_get_noisy_reply (&target_buf, &target_buf_size);
10032 if (strcmp (target_buf, "OK"))
10033 warning (_("Target does not support source download."));
10039 remote_download_tracepoint (struct bp_location *loc)
10045 char **tdp_actions;
10046 char **stepping_actions;
10048 struct cleanup *old_chain = NULL;
10049 struct agent_expr *aexpr;
10050 struct cleanup *aexpr_chain = NULL;
10052 struct breakpoint *b = loc->owner;
10053 struct tracepoint *t = (struct tracepoint *) b;
10055 encode_actions (loc->owner, loc, &tdp_actions, &stepping_actions);
10056 old_chain = make_cleanup (free_actions_list_cleanup_wrapper,
10058 (void) make_cleanup (free_actions_list_cleanup_wrapper,
10061 tpaddr = loc->address;
10062 sprintf_vma (addrbuf, tpaddr);
10063 sprintf (buf, "QTDP:%x:%s:%c:%lx:%x", b->number,
10064 addrbuf, /* address */
10065 (b->enable_state == bp_enabled ? 'E' : 'D'),
10066 t->step_count, t->pass_count);
10067 /* Fast tracepoints are mostly handled by the target, but we can
10068 tell the target how big of an instruction block should be moved
10070 if (b->type == bp_fast_tracepoint)
10072 /* Only test for support at download time; we may not know
10073 target capabilities at definition time. */
10074 if (remote_supports_fast_tracepoints ())
10078 if (gdbarch_fast_tracepoint_valid_at (target_gdbarch,
10079 tpaddr, &isize, NULL))
10080 sprintf (buf + strlen (buf), ":F%x", isize);
10082 /* If it passed validation at definition but fails now,
10083 something is very wrong. */
10084 internal_error (__FILE__, __LINE__,
10085 _("Fast tracepoint not "
10086 "valid during download"));
10089 /* Fast tracepoints are functionally identical to regular
10090 tracepoints, so don't take lack of support as a reason to
10091 give up on the trace run. */
10092 warning (_("Target does not support fast tracepoints, "
10093 "downloading %d as regular tracepoint"), b->number);
10095 else if (b->type == bp_static_tracepoint)
10097 /* Only test for support at download time; we may not know
10098 target capabilities at definition time. */
10099 if (remote_supports_static_tracepoints ())
10101 struct static_tracepoint_marker marker;
10103 if (target_static_tracepoint_marker_at (tpaddr, &marker))
10104 strcat (buf, ":S");
10106 error (_("Static tracepoint not valid during download"));
10109 /* Fast tracepoints are functionally identical to regular
10110 tracepoints, so don't take lack of support as a reason
10111 to give up on the trace run. */
10112 error (_("Target does not support static tracepoints"));
10114 /* If the tracepoint has a conditional, make it into an agent
10115 expression and append to the definition. */
10118 /* Only test support at download time, we may not know target
10119 capabilities at definition time. */
10120 if (remote_supports_cond_tracepoints ())
10122 aexpr = gen_eval_for_expr (tpaddr, loc->cond);
10123 aexpr_chain = make_cleanup_free_agent_expr (aexpr);
10124 sprintf (buf + strlen (buf), ":X%x,", aexpr->len);
10125 pkt = buf + strlen (buf);
10126 for (ndx = 0; ndx < aexpr->len; ++ndx)
10127 pkt = pack_hex_byte (pkt, aexpr->buf[ndx]);
10129 do_cleanups (aexpr_chain);
10132 warning (_("Target does not support conditional tracepoints, "
10133 "ignoring tp %d cond"), b->number);
10136 if (b->commands || *default_collect)
10139 remote_get_noisy_reply (&target_buf, &target_buf_size);
10140 if (strcmp (target_buf, "OK"))
10141 error (_("Target does not support tracepoints."));
10143 /* do_single_steps (t); */
10146 for (ndx = 0; tdp_actions[ndx]; ndx++)
10148 QUIT; /* Allow user to bail out with ^C. */
10149 sprintf (buf, "QTDP:-%x:%s:%s%c",
10150 b->number, addrbuf, /* address */
10152 ((tdp_actions[ndx + 1] || stepping_actions)
10155 remote_get_noisy_reply (&target_buf,
10157 if (strcmp (target_buf, "OK"))
10158 error (_("Error on target while setting tracepoints."));
10161 if (stepping_actions)
10163 for (ndx = 0; stepping_actions[ndx]; ndx++)
10165 QUIT; /* Allow user to bail out with ^C. */
10166 sprintf (buf, "QTDP:-%x:%s:%s%s%s",
10167 b->number, addrbuf, /* address */
10168 ((ndx == 0) ? "S" : ""),
10169 stepping_actions[ndx],
10170 (stepping_actions[ndx + 1] ? "-" : ""));
10172 remote_get_noisy_reply (&target_buf,
10174 if (strcmp (target_buf, "OK"))
10175 error (_("Error on target while setting tracepoints."));
10179 if (remote_protocol_packets[PACKET_TracepointSource].support
10182 if (b->addr_string)
10184 strcpy (buf, "QTDPsrc:");
10185 encode_source_string (b->number, loc->address,
10186 "at", b->addr_string, buf + strlen (buf),
10187 2048 - strlen (buf));
10190 remote_get_noisy_reply (&target_buf, &target_buf_size);
10191 if (strcmp (target_buf, "OK"))
10192 warning (_("Target does not support source download."));
10194 if (b->cond_string)
10196 strcpy (buf, "QTDPsrc:");
10197 encode_source_string (b->number, loc->address,
10198 "cond", b->cond_string, buf + strlen (buf),
10199 2048 - strlen (buf));
10201 remote_get_noisy_reply (&target_buf, &target_buf_size);
10202 if (strcmp (target_buf, "OK"))
10203 warning (_("Target does not support source download."));
10205 remote_download_command_source (b->number, loc->address,
10206 breakpoint_commands (b));
10209 do_cleanups (old_chain);
10213 remote_can_download_tracepoint (void)
10215 struct trace_status *ts = current_trace_status ();
10216 int status = remote_get_trace_status (ts);
10218 if (status == -1 || !ts->running_known || !ts->running)
10221 /* If we are in a tracing experiment, but remote stub doesn't support
10222 installing tracepoint in trace, we have to return. */
10223 if (!remote_supports_install_in_trace ())
10231 remote_download_trace_state_variable (struct trace_state_variable *tsv)
10233 struct remote_state *rs = get_remote_state ();
10236 sprintf (rs->buf, "QTDV:%x:%s:%x:",
10237 tsv->number, phex ((ULONGEST) tsv->initial_value, 8), tsv->builtin);
10238 p = rs->buf + strlen (rs->buf);
10239 if ((p - rs->buf) + strlen (tsv->name) * 2 >= get_remote_packet_size ())
10240 error (_("Trace state variable name too long for tsv definition packet"));
10241 p += 2 * bin2hex ((gdb_byte *) (tsv->name), p, 0);
10244 remote_get_noisy_reply (&target_buf, &target_buf_size);
10245 if (*target_buf == '\0')
10246 error (_("Target does not support this command."));
10247 if (strcmp (target_buf, "OK") != 0)
10248 error (_("Error on target while downloading trace state variable."));
10252 remote_enable_tracepoint (struct bp_location *location)
10254 struct remote_state *rs = get_remote_state ();
10257 sprintf_vma (addr_buf, location->address);
10258 sprintf (rs->buf, "QTEnable:%x:%s", location->owner->number, addr_buf);
10260 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
10261 if (*rs->buf == '\0')
10262 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
10263 if (strcmp (rs->buf, "OK") != 0)
10264 error (_("Error on target while enabling tracepoint."));
10268 remote_disable_tracepoint (struct bp_location *location)
10270 struct remote_state *rs = get_remote_state ();
10273 sprintf_vma (addr_buf, location->address);
10274 sprintf (rs->buf, "QTDisable:%x:%s", location->owner->number, addr_buf);
10276 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
10277 if (*rs->buf == '\0')
10278 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
10279 if (strcmp (rs->buf, "OK") != 0)
10280 error (_("Error on target while disabling tracepoint."));
10284 remote_trace_set_readonly_regions (void)
10287 bfd_size_type size;
10293 return; /* No information to give. */
10295 strcpy (target_buf, "QTro");
10296 for (s = exec_bfd->sections; s; s = s->next)
10298 char tmp1[40], tmp2[40];
10301 if ((s->flags & SEC_LOAD) == 0 ||
10302 /* (s->flags & SEC_CODE) == 0 || */
10303 (s->flags & SEC_READONLY) == 0)
10307 vma = bfd_get_section_vma (,s);
10308 size = bfd_get_section_size (s);
10309 sprintf_vma (tmp1, vma);
10310 sprintf_vma (tmp2, vma + size);
10311 sec_length = 1 + strlen (tmp1) + 1 + strlen (tmp2);
10312 if (offset + sec_length + 1 > target_buf_size)
10314 if (remote_protocol_packets[PACKET_qXfer_traceframe_info].support
10317 Too many sections for read-only sections definition packet."));
10320 sprintf (target_buf + offset, ":%s,%s", tmp1, tmp2);
10321 offset += sec_length;
10325 putpkt (target_buf);
10326 getpkt (&target_buf, &target_buf_size, 0);
10331 remote_trace_start (void)
10333 putpkt ("QTStart");
10334 remote_get_noisy_reply (&target_buf, &target_buf_size);
10335 if (*target_buf == '\0')
10336 error (_("Target does not support this command."));
10337 if (strcmp (target_buf, "OK") != 0)
10338 error (_("Bogus reply from target: %s"), target_buf);
10342 remote_get_trace_status (struct trace_status *ts)
10344 /* Initialize it just to avoid a GCC false warning. */
10346 /* FIXME we need to get register block size some other way. */
10347 extern int trace_regblock_size;
10348 volatile struct gdb_exception ex;
10350 trace_regblock_size = get_remote_arch_state ()->sizeof_g_packet;
10352 putpkt ("qTStatus");
10354 TRY_CATCH (ex, RETURN_MASK_ERROR)
10356 p = remote_get_noisy_reply (&target_buf, &target_buf_size);
10360 exception_fprintf (gdb_stderr, ex, "qTStatus: ");
10364 /* If the remote target doesn't do tracing, flag it. */
10368 /* We're working with a live target. */
10371 /* Set some defaults. */
10372 ts->running_known = 0;
10373 ts->stop_reason = trace_stop_reason_unknown;
10374 ts->traceframe_count = -1;
10375 ts->buffer_free = 0;
10378 error (_("Bogus trace status reply from target: %s"), target_buf);
10380 parse_trace_status (p, ts);
10382 return ts->running;
10386 remote_get_tracepoint_status (struct breakpoint *bp,
10387 struct uploaded_tp *utp)
10389 struct remote_state *rs = get_remote_state ();
10391 struct bp_location *loc;
10392 struct tracepoint *tp = (struct tracepoint *) bp;
10396 tp->base.hit_count = 0;
10397 tp->traceframe_usage = 0;
10398 for (loc = tp->base.loc; loc; loc = loc->next)
10400 /* If the tracepoint was never downloaded, don't go asking for
10402 if (tp->number_on_target == 0)
10404 sprintf (rs->buf, "qTP:%x:%s", tp->number_on_target,
10405 phex_nz (loc->address, 0));
10407 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
10408 if (reply && *reply)
10411 parse_tracepoint_status (reply + 1, bp, utp);
10417 utp->hit_count = 0;
10418 utp->traceframe_usage = 0;
10419 sprintf (rs->buf, "qTP:%x:%s", utp->number, phex_nz (utp->addr, 0));
10421 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
10422 if (reply && *reply)
10425 parse_tracepoint_status (reply + 1, bp, utp);
10431 remote_trace_stop (void)
10434 remote_get_noisy_reply (&target_buf, &target_buf_size);
10435 if (*target_buf == '\0')
10436 error (_("Target does not support this command."));
10437 if (strcmp (target_buf, "OK") != 0)
10438 error (_("Bogus reply from target: %s"), target_buf);
10442 remote_trace_find (enum trace_find_type type, int num,
10443 ULONGEST addr1, ULONGEST addr2,
10446 struct remote_state *rs = get_remote_state ();
10448 int target_frameno = -1, target_tracept = -1;
10450 /* Lookups other than by absolute frame number depend on the current
10451 trace selected, so make sure it is correct on the remote end
10453 if (type != tfind_number)
10454 set_remote_traceframe ();
10457 strcpy (p, "QTFrame:");
10458 p = strchr (p, '\0');
10462 sprintf (p, "%x", num);
10465 sprintf (p, "pc:%s", phex_nz (addr1, 0));
10468 sprintf (p, "tdp:%x", num);
10471 sprintf (p, "range:%s:%s", phex_nz (addr1, 0), phex_nz (addr2, 0));
10473 case tfind_outside:
10474 sprintf (p, "outside:%s:%s", phex_nz (addr1, 0), phex_nz (addr2, 0));
10477 error (_("Unknown trace find type %d"), type);
10481 reply = remote_get_noisy_reply (&(rs->buf), &sizeof_pkt);
10482 if (*reply == '\0')
10483 error (_("Target does not support this command."));
10485 while (reply && *reply)
10490 target_frameno = (int) strtol (p, &reply, 16);
10492 error (_("Unable to parse trace frame number"));
10493 /* Don't update our remote traceframe number cache on failure
10494 to select a remote traceframe. */
10495 if (target_frameno == -1)
10500 target_tracept = (int) strtol (p, &reply, 16);
10502 error (_("Unable to parse tracepoint number"));
10504 case 'O': /* "OK"? */
10505 if (reply[1] == 'K' && reply[2] == '\0')
10508 error (_("Bogus reply from target: %s"), reply);
10511 error (_("Bogus reply from target: %s"), reply);
10514 *tpp = target_tracept;
10516 remote_traceframe_number = target_frameno;
10517 return target_frameno;
10521 remote_get_trace_state_variable_value (int tsvnum, LONGEST *val)
10523 struct remote_state *rs = get_remote_state ();
10527 set_remote_traceframe ();
10529 sprintf (rs->buf, "qTV:%x", tsvnum);
10531 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
10532 if (reply && *reply)
10536 unpack_varlen_hex (reply + 1, &uval);
10537 *val = (LONGEST) uval;
10545 remote_save_trace_data (const char *filename)
10547 struct remote_state *rs = get_remote_state ();
10551 strcpy (p, "QTSave:");
10553 if ((p - rs->buf) + strlen (filename) * 2 >= get_remote_packet_size ())
10554 error (_("Remote file name too long for trace save packet"));
10555 p += 2 * bin2hex ((gdb_byte *) filename, p, 0);
10558 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
10559 if (*reply == '\0')
10560 error (_("Target does not support this command."));
10561 if (strcmp (reply, "OK") != 0)
10562 error (_("Bogus reply from target: %s"), reply);
10566 /* This is basically a memory transfer, but needs to be its own packet
10567 because we don't know how the target actually organizes its trace
10568 memory, plus we want to be able to ask for as much as possible, but
10569 not be unhappy if we don't get as much as we ask for. */
10572 remote_get_raw_trace_data (gdb_byte *buf, ULONGEST offset, LONGEST len)
10574 struct remote_state *rs = get_remote_state ();
10580 strcpy (p, "qTBuffer:");
10582 p += hexnumstr (p, offset);
10584 p += hexnumstr (p, len);
10588 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
10589 if (reply && *reply)
10591 /* 'l' by itself means we're at the end of the buffer and
10592 there is nothing more to get. */
10596 /* Convert the reply into binary. Limit the number of bytes to
10597 convert according to our passed-in buffer size, rather than
10598 what was returned in the packet; if the target is
10599 unexpectedly generous and gives us a bigger reply than we
10600 asked for, we don't want to crash. */
10601 rslt = hex2bin (target_buf, buf, len);
10605 /* Something went wrong, flag as an error. */
10610 remote_set_disconnected_tracing (int val)
10612 struct remote_state *rs = get_remote_state ();
10614 if (rs->disconnected_tracing)
10618 sprintf (rs->buf, "QTDisconnected:%x", val);
10620 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
10621 if (*reply == '\0')
10622 error (_("Target does not support this command."));
10623 if (strcmp (reply, "OK") != 0)
10624 error (_("Bogus reply from target: %s"), reply);
10627 warning (_("Target does not support disconnected tracing."));
10631 remote_core_of_thread (struct target_ops *ops, ptid_t ptid)
10633 struct thread_info *info = find_thread_ptid (ptid);
10635 if (info && info->private)
10636 return info->private->core;
10641 remote_set_circular_trace_buffer (int val)
10643 struct remote_state *rs = get_remote_state ();
10646 sprintf (rs->buf, "QTBuffer:circular:%x", val);
10648 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
10649 if (*reply == '\0')
10650 error (_("Target does not support this command."));
10651 if (strcmp (reply, "OK") != 0)
10652 error (_("Bogus reply from target: %s"), reply);
10655 static struct traceframe_info *
10656 remote_traceframe_info (void)
10660 text = target_read_stralloc (¤t_target,
10661 TARGET_OBJECT_TRACEFRAME_INFO, NULL);
10664 struct traceframe_info *info;
10665 struct cleanup *back_to = make_cleanup (xfree, text);
10667 info = parse_traceframe_info (text);
10668 do_cleanups (back_to);
10675 /* Handle the qTMinFTPILen packet. Returns the minimum length of
10676 instruction on which a fast tracepoint may be placed. Returns -1
10677 if the packet is not supported, and 0 if the minimum instruction
10678 length is unknown. */
10681 remote_get_min_fast_tracepoint_insn_len (void)
10683 struct remote_state *rs = get_remote_state ();
10686 /* If we're not debugging a process yet, the IPA can't be
10688 if (!target_has_execution)
10691 /* Make sure the remote is pointing at the right process. */
10692 set_general_process ();
10694 sprintf (rs->buf, "qTMinFTPILen");
10696 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
10697 if (*reply == '\0')
10701 ULONGEST min_insn_len;
10703 unpack_varlen_hex (reply, &min_insn_len);
10705 return (int) min_insn_len;
10710 remote_set_trace_notes (char *user, char *notes, char *stop_notes)
10712 struct remote_state *rs = get_remote_state ();
10714 char *buf = rs->buf;
10715 char *endbuf = rs->buf + get_remote_packet_size ();
10718 buf += xsnprintf (buf, endbuf - buf, "QTNotes:");
10721 buf += xsnprintf (buf, endbuf - buf, "user:");
10722 nbytes = bin2hex (user, buf, 0);
10728 buf += xsnprintf (buf, endbuf - buf, "notes:");
10729 nbytes = bin2hex (notes, buf, 0);
10735 buf += xsnprintf (buf, endbuf - buf, "tstop:");
10736 nbytes = bin2hex (stop_notes, buf, 0);
10740 /* Ensure the buffer is terminated. */
10744 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
10745 if (*reply == '\0')
10748 if (strcmp (reply, "OK") != 0)
10749 error (_("Bogus reply from target: %s"), reply);
10755 init_remote_ops (void)
10757 remote_ops.to_shortname = "remote";
10758 remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
10759 remote_ops.to_doc =
10760 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
10761 Specify the serial device it is connected to\n\
10762 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
10763 remote_ops.to_open = remote_open;
10764 remote_ops.to_close = remote_close;
10765 remote_ops.to_detach = remote_detach;
10766 remote_ops.to_disconnect = remote_disconnect;
10767 remote_ops.to_resume = remote_resume;
10768 remote_ops.to_wait = remote_wait;
10769 remote_ops.to_fetch_registers = remote_fetch_registers;
10770 remote_ops.to_store_registers = remote_store_registers;
10771 remote_ops.to_prepare_to_store = remote_prepare_to_store;
10772 remote_ops.deprecated_xfer_memory = remote_xfer_memory;
10773 remote_ops.to_files_info = remote_files_info;
10774 remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
10775 remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
10776 remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
10777 remote_ops.to_stopped_data_address = remote_stopped_data_address;
10778 remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
10779 remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
10780 remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
10781 remote_ops.to_region_ok_for_hw_watchpoint
10782 = remote_region_ok_for_hw_watchpoint;
10783 remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
10784 remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
10785 remote_ops.to_kill = remote_kill;
10786 remote_ops.to_load = generic_load;
10787 remote_ops.to_mourn_inferior = remote_mourn;
10788 remote_ops.to_pass_signals = remote_pass_signals;
10789 remote_ops.to_thread_alive = remote_thread_alive;
10790 remote_ops.to_find_new_threads = remote_threads_info;
10791 remote_ops.to_pid_to_str = remote_pid_to_str;
10792 remote_ops.to_extra_thread_info = remote_threads_extra_info;
10793 remote_ops.to_get_ada_task_ptid = remote_get_ada_task_ptid;
10794 remote_ops.to_stop = remote_stop;
10795 remote_ops.to_xfer_partial = remote_xfer_partial;
10796 remote_ops.to_rcmd = remote_rcmd;
10797 remote_ops.to_log_command = serial_log_command;
10798 remote_ops.to_get_thread_local_address = remote_get_thread_local_address;
10799 remote_ops.to_stratum = process_stratum;
10800 remote_ops.to_has_all_memory = default_child_has_all_memory;
10801 remote_ops.to_has_memory = default_child_has_memory;
10802 remote_ops.to_has_stack = default_child_has_stack;
10803 remote_ops.to_has_registers = default_child_has_registers;
10804 remote_ops.to_has_execution = default_child_has_execution;
10805 remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
10806 remote_ops.to_can_execute_reverse = remote_can_execute_reverse;
10807 remote_ops.to_magic = OPS_MAGIC;
10808 remote_ops.to_memory_map = remote_memory_map;
10809 remote_ops.to_flash_erase = remote_flash_erase;
10810 remote_ops.to_flash_done = remote_flash_done;
10811 remote_ops.to_read_description = remote_read_description;
10812 remote_ops.to_search_memory = remote_search_memory;
10813 remote_ops.to_can_async_p = remote_can_async_p;
10814 remote_ops.to_is_async_p = remote_is_async_p;
10815 remote_ops.to_async = remote_async;
10816 remote_ops.to_terminal_inferior = remote_terminal_inferior;
10817 remote_ops.to_terminal_ours = remote_terminal_ours;
10818 remote_ops.to_supports_non_stop = remote_supports_non_stop;
10819 remote_ops.to_supports_multi_process = remote_supports_multi_process;
10820 remote_ops.to_supports_disable_randomization
10821 = remote_supports_disable_randomization;
10822 remote_ops.to_fileio_open = remote_hostio_open;
10823 remote_ops.to_fileio_pwrite = remote_hostio_pwrite;
10824 remote_ops.to_fileio_pread = remote_hostio_pread;
10825 remote_ops.to_fileio_close = remote_hostio_close;
10826 remote_ops.to_fileio_unlink = remote_hostio_unlink;
10827 remote_ops.to_fileio_readlink = remote_hostio_readlink;
10828 remote_ops.to_supports_enable_disable_tracepoint = remote_supports_enable_disable_tracepoint;
10829 remote_ops.to_supports_string_tracing = remote_supports_string_tracing;
10830 remote_ops.to_supports_evaluation_of_breakpoint_conditions = remote_supports_cond_breakpoints;
10831 remote_ops.to_trace_init = remote_trace_init;
10832 remote_ops.to_download_tracepoint = remote_download_tracepoint;
10833 remote_ops.to_can_download_tracepoint = remote_can_download_tracepoint;
10834 remote_ops.to_download_trace_state_variable
10835 = remote_download_trace_state_variable;
10836 remote_ops.to_enable_tracepoint = remote_enable_tracepoint;
10837 remote_ops.to_disable_tracepoint = remote_disable_tracepoint;
10838 remote_ops.to_trace_set_readonly_regions = remote_trace_set_readonly_regions;
10839 remote_ops.to_trace_start = remote_trace_start;
10840 remote_ops.to_get_trace_status = remote_get_trace_status;
10841 remote_ops.to_get_tracepoint_status = remote_get_tracepoint_status;
10842 remote_ops.to_trace_stop = remote_trace_stop;
10843 remote_ops.to_trace_find = remote_trace_find;
10844 remote_ops.to_get_trace_state_variable_value
10845 = remote_get_trace_state_variable_value;
10846 remote_ops.to_save_trace_data = remote_save_trace_data;
10847 remote_ops.to_upload_tracepoints = remote_upload_tracepoints;
10848 remote_ops.to_upload_trace_state_variables
10849 = remote_upload_trace_state_variables;
10850 remote_ops.to_get_raw_trace_data = remote_get_raw_trace_data;
10851 remote_ops.to_get_min_fast_tracepoint_insn_len = remote_get_min_fast_tracepoint_insn_len;
10852 remote_ops.to_set_disconnected_tracing = remote_set_disconnected_tracing;
10853 remote_ops.to_set_circular_trace_buffer = remote_set_circular_trace_buffer;
10854 remote_ops.to_set_trace_notes = remote_set_trace_notes;
10855 remote_ops.to_core_of_thread = remote_core_of_thread;
10856 remote_ops.to_verify_memory = remote_verify_memory;
10857 remote_ops.to_get_tib_address = remote_get_tib_address;
10858 remote_ops.to_set_permissions = remote_set_permissions;
10859 remote_ops.to_static_tracepoint_marker_at
10860 = remote_static_tracepoint_marker_at;
10861 remote_ops.to_static_tracepoint_markers_by_strid
10862 = remote_static_tracepoint_markers_by_strid;
10863 remote_ops.to_traceframe_info = remote_traceframe_info;
10866 /* Set up the extended remote vector by making a copy of the standard
10867 remote vector and adding to it. */
10870 init_extended_remote_ops (void)
10872 extended_remote_ops = remote_ops;
10874 extended_remote_ops.to_shortname = "extended-remote";
10875 extended_remote_ops.to_longname =
10876 "Extended remote serial target in gdb-specific protocol";
10877 extended_remote_ops.to_doc =
10878 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
10879 Specify the serial device it is connected to (e.g. /dev/ttya).";
10880 extended_remote_ops.to_open = extended_remote_open;
10881 extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
10882 extended_remote_ops.to_mourn_inferior = extended_remote_mourn;
10883 extended_remote_ops.to_detach = extended_remote_detach;
10884 extended_remote_ops.to_attach = extended_remote_attach;
10885 extended_remote_ops.to_kill = extended_remote_kill;
10886 extended_remote_ops.to_supports_disable_randomization
10887 = extended_remote_supports_disable_randomization;
10891 remote_can_async_p (void)
10893 if (!target_async_permitted)
10894 /* We only enable async when the user specifically asks for it. */
10897 /* We're async whenever the serial device is. */
10898 return serial_can_async_p (remote_desc);
10902 remote_is_async_p (void)
10904 if (!target_async_permitted)
10905 /* We only enable async when the user specifically asks for it. */
10908 /* We're async whenever the serial device is. */
10909 return serial_is_async_p (remote_desc);
10912 /* Pass the SERIAL event on and up to the client. One day this code
10913 will be able to delay notifying the client of an event until the
10914 point where an entire packet has been received. */
10916 static void (*async_client_callback) (enum inferior_event_type event_type,
10918 static void *async_client_context;
10919 static serial_event_ftype remote_async_serial_handler;
10922 remote_async_serial_handler (struct serial *scb, void *context)
10924 /* Don't propogate error information up to the client. Instead let
10925 the client find out about the error by querying the target. */
10926 async_client_callback (INF_REG_EVENT, async_client_context);
10930 remote_async_inferior_event_handler (gdb_client_data data)
10932 inferior_event_handler (INF_REG_EVENT, NULL);
10936 remote_async_get_pending_events_handler (gdb_client_data data)
10938 remote_get_pending_stop_replies ();
10942 remote_async (void (*callback) (enum inferior_event_type event_type,
10943 void *context), void *context)
10945 if (callback != NULL)
10947 serial_async (remote_desc, remote_async_serial_handler, NULL);
10948 async_client_callback = callback;
10949 async_client_context = context;
10952 serial_async (remote_desc, NULL, NULL);
10956 set_remote_cmd (char *args, int from_tty)
10958 help_list (remote_set_cmdlist, "set remote ", -1, gdb_stdout);
10962 show_remote_cmd (char *args, int from_tty)
10964 /* We can't just use cmd_show_list here, because we want to skip
10965 the redundant "show remote Z-packet" and the legacy aliases. */
10966 struct cleanup *showlist_chain;
10967 struct cmd_list_element *list = remote_show_cmdlist;
10968 struct ui_out *uiout = current_uiout;
10970 showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist");
10971 for (; list != NULL; list = list->next)
10972 if (strcmp (list->name, "Z-packet") == 0)
10974 else if (list->type == not_set_cmd)
10975 /* Alias commands are exactly like the original, except they
10976 don't have the normal type. */
10980 struct cleanup *option_chain
10981 = make_cleanup_ui_out_tuple_begin_end (uiout, "option");
10983 ui_out_field_string (uiout, "name", list->name);
10984 ui_out_text (uiout, ": ");
10985 if (list->type == show_cmd)
10986 do_setshow_command ((char *) NULL, from_tty, list);
10988 cmd_func (list, NULL, from_tty);
10989 /* Close the tuple. */
10990 do_cleanups (option_chain);
10993 /* Close the tuple. */
10994 do_cleanups (showlist_chain);
10998 /* Function to be called whenever a new objfile (shlib) is detected. */
11000 remote_new_objfile (struct objfile *objfile)
11002 if (remote_desc != 0) /* Have a remote connection. */
11003 remote_check_symbols (objfile);
11006 /* Pull all the tracepoints defined on the target and create local
11007 data structures representing them. We don't want to create real
11008 tracepoints yet, we don't want to mess up the user's existing
11012 remote_upload_tracepoints (struct uploaded_tp **utpp)
11014 struct remote_state *rs = get_remote_state ();
11017 /* Ask for a first packet of tracepoint definition. */
11019 getpkt (&rs->buf, &rs->buf_size, 0);
11021 while (*p && *p != 'l')
11023 parse_tracepoint_definition (p, utpp);
11024 /* Ask for another packet of tracepoint definition. */
11026 getpkt (&rs->buf, &rs->buf_size, 0);
11033 remote_upload_trace_state_variables (struct uploaded_tsv **utsvp)
11035 struct remote_state *rs = get_remote_state ();
11038 /* Ask for a first packet of variable definition. */
11040 getpkt (&rs->buf, &rs->buf_size, 0);
11042 while (*p && *p != 'l')
11044 parse_tsv_definition (p, utsvp);
11045 /* Ask for another packet of variable definition. */
11047 getpkt (&rs->buf, &rs->buf_size, 0);
11054 _initialize_remote (void)
11056 struct remote_state *rs;
11057 struct cmd_list_element *cmd;
11060 /* architecture specific data */
11061 remote_gdbarch_data_handle =
11062 gdbarch_data_register_post_init (init_remote_state);
11063 remote_g_packet_data_handle =
11064 gdbarch_data_register_pre_init (remote_g_packet_data_init);
11066 /* Initialize the per-target state. At the moment there is only one
11067 of these, not one per target. Only one target is active at a
11068 time. The default buffer size is unimportant; it will be expanded
11069 whenever a larger buffer is needed. */
11070 rs = get_remote_state_raw ();
11071 rs->buf_size = 400;
11072 rs->buf = xmalloc (rs->buf_size);
11074 init_remote_ops ();
11075 add_target (&remote_ops);
11077 init_extended_remote_ops ();
11078 add_target (&extended_remote_ops);
11080 /* Hook into new objfile notification. */
11081 observer_attach_new_objfile (remote_new_objfile);
11083 /* Set up signal handlers. */
11084 sigint_remote_token =
11085 create_async_signal_handler (async_remote_interrupt, NULL);
11086 sigint_remote_twice_token =
11087 create_async_signal_handler (async_remote_interrupt_twice, NULL);
11090 init_remote_threadtests ();
11093 /* set/show remote ... */
11095 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
11096 Remote protocol specific variables\n\
11097 Configure various remote-protocol specific variables such as\n\
11098 the packets being used"),
11099 &remote_set_cmdlist, "set remote ",
11100 0 /* allow-unknown */, &setlist);
11101 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
11102 Remote protocol specific variables\n\
11103 Configure various remote-protocol specific variables such as\n\
11104 the packets being used"),
11105 &remote_show_cmdlist, "show remote ",
11106 0 /* allow-unknown */, &showlist);
11108 add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
11109 Compare section data on target to the exec file.\n\
11110 Argument is a single section name (default: all loaded sections)."),
11113 add_cmd ("packet", class_maintenance, packet_command, _("\
11114 Send an arbitrary packet to a remote target.\n\
11115 maintenance packet TEXT\n\
11116 If GDB is talking to an inferior via the GDB serial protocol, then\n\
11117 this command sends the string TEXT to the inferior, and displays the\n\
11118 response packet. GDB supplies the initial `$' character, and the\n\
11119 terminating `#' character and checksum."),
11122 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
11123 Set whether to send break if interrupted."), _("\
11124 Show whether to send break if interrupted."), _("\
11125 If set, a break, instead of a cntrl-c, is sent to the remote target."),
11126 set_remotebreak, show_remotebreak,
11127 &setlist, &showlist);
11128 cmd_name = "remotebreak";
11129 cmd = lookup_cmd (&cmd_name, setlist, "", -1, 1);
11130 deprecate_cmd (cmd, "set remote interrupt-sequence");
11131 cmd_name = "remotebreak"; /* needed because lookup_cmd updates the pointer */
11132 cmd = lookup_cmd (&cmd_name, showlist, "", -1, 1);
11133 deprecate_cmd (cmd, "show remote interrupt-sequence");
11135 add_setshow_enum_cmd ("interrupt-sequence", class_support,
11136 interrupt_sequence_modes, &interrupt_sequence_mode,
11138 Set interrupt sequence to remote target."), _("\
11139 Show interrupt sequence to remote target."), _("\
11140 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
11141 NULL, show_interrupt_sequence,
11142 &remote_set_cmdlist,
11143 &remote_show_cmdlist);
11145 add_setshow_boolean_cmd ("interrupt-on-connect", class_support,
11146 &interrupt_on_connect, _("\
11147 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
11148 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
11149 If set, interrupt sequence is sent to remote target."),
11151 &remote_set_cmdlist, &remote_show_cmdlist);
11153 /* Install commands for configuring memory read/write packets. */
11155 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
11156 Set the maximum number of bytes per memory write packet (deprecated)."),
11158 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
11159 Show the maximum number of bytes per memory write packet (deprecated)."),
11161 add_cmd ("memory-write-packet-size", no_class,
11162 set_memory_write_packet_size, _("\
11163 Set the maximum number of bytes per memory-write packet.\n\
11164 Specify the number of bytes in a packet or 0 (zero) for the\n\
11165 default packet size. The actual limit is further reduced\n\
11166 dependent on the target. Specify ``fixed'' to disable the\n\
11167 further restriction and ``limit'' to enable that restriction."),
11168 &remote_set_cmdlist);
11169 add_cmd ("memory-read-packet-size", no_class,
11170 set_memory_read_packet_size, _("\
11171 Set the maximum number of bytes per memory-read packet.\n\
11172 Specify the number of bytes in a packet or 0 (zero) for the\n\
11173 default packet size. The actual limit is further reduced\n\
11174 dependent on the target. Specify ``fixed'' to disable the\n\
11175 further restriction and ``limit'' to enable that restriction."),
11176 &remote_set_cmdlist);
11177 add_cmd ("memory-write-packet-size", no_class,
11178 show_memory_write_packet_size,
11179 _("Show the maximum number of bytes per memory-write packet."),
11180 &remote_show_cmdlist);
11181 add_cmd ("memory-read-packet-size", no_class,
11182 show_memory_read_packet_size,
11183 _("Show the maximum number of bytes per memory-read packet."),
11184 &remote_show_cmdlist);
11186 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class,
11187 &remote_hw_watchpoint_limit, _("\
11188 Set the maximum number of target hardware watchpoints."), _("\
11189 Show the maximum number of target hardware watchpoints."), _("\
11190 Specify a negative limit for unlimited."),
11191 NULL, NULL, /* FIXME: i18n: The maximum
11192 number of target hardware
11193 watchpoints is %s. */
11194 &remote_set_cmdlist, &remote_show_cmdlist);
11195 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class,
11196 &remote_hw_watchpoint_length_limit, _("\
11197 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
11198 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
11199 Specify a negative limit for unlimited."),
11200 NULL, NULL, /* FIXME: i18n: The maximum
11201 length (in bytes) of a target
11202 hardware watchpoint is %s. */
11203 &remote_set_cmdlist, &remote_show_cmdlist);
11204 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class,
11205 &remote_hw_breakpoint_limit, _("\
11206 Set the maximum number of target hardware breakpoints."), _("\
11207 Show the maximum number of target hardware breakpoints."), _("\
11208 Specify a negative limit for unlimited."),
11209 NULL, NULL, /* FIXME: i18n: The maximum
11210 number of target hardware
11211 breakpoints is %s. */
11212 &remote_set_cmdlist, &remote_show_cmdlist);
11214 add_setshow_integer_cmd ("remoteaddresssize", class_obscure,
11215 &remote_address_size, _("\
11216 Set the maximum size of the address (in bits) in a memory packet."), _("\
11217 Show the maximum size of the address (in bits) in a memory packet."), NULL,
11219 NULL, /* FIXME: i18n: */
11220 &setlist, &showlist);
11222 add_packet_config_cmd (&remote_protocol_packets[PACKET_X],
11223 "X", "binary-download", 1);
11225 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont],
11226 "vCont", "verbose-resume", 0);
11228 add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals],
11229 "QPassSignals", "pass-signals", 0);
11231 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol],
11232 "qSymbol", "symbol-lookup", 0);
11234 add_packet_config_cmd (&remote_protocol_packets[PACKET_P],
11235 "P", "set-register", 1);
11237 add_packet_config_cmd (&remote_protocol_packets[PACKET_p],
11238 "p", "fetch-register", 1);
11240 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0],
11241 "Z0", "software-breakpoint", 0);
11243 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1],
11244 "Z1", "hardware-breakpoint", 0);
11246 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2],
11247 "Z2", "write-watchpoint", 0);
11249 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3],
11250 "Z3", "read-watchpoint", 0);
11252 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4],
11253 "Z4", "access-watchpoint", 0);
11255 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv],
11256 "qXfer:auxv:read", "read-aux-vector", 0);
11258 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features],
11259 "qXfer:features:read", "target-features", 0);
11261 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries],
11262 "qXfer:libraries:read", "library-info", 0);
11264 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries_svr4],
11265 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
11267 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map],
11268 "qXfer:memory-map:read", "memory-map", 0);
11270 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read],
11271 "qXfer:spu:read", "read-spu-object", 0);
11273 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write],
11274 "qXfer:spu:write", "write-spu-object", 0);
11276 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata],
11277 "qXfer:osdata:read", "osdata", 0);
11279 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_threads],
11280 "qXfer:threads:read", "threads", 0);
11282 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read],
11283 "qXfer:siginfo:read", "read-siginfo-object", 0);
11285 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write],
11286 "qXfer:siginfo:write", "write-siginfo-object", 0);
11288 add_packet_config_cmd
11289 (&remote_protocol_packets[PACKET_qXfer_traceframe_info],
11290 "qXfer:trace-frame-info:read", "traceframe-info", 0);
11292 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
11293 "qGetTLSAddr", "get-thread-local-storage-address",
11296 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTIBAddr],
11297 "qGetTIBAddr", "get-thread-information-block-address",
11300 add_packet_config_cmd (&remote_protocol_packets[PACKET_bc],
11301 "bc", "reverse-continue", 0);
11303 add_packet_config_cmd (&remote_protocol_packets[PACKET_bs],
11304 "bs", "reverse-step", 0);
11306 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported],
11307 "qSupported", "supported-packets", 0);
11309 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory],
11310 "qSearch:memory", "search-memory", 0);
11312 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open],
11313 "vFile:open", "hostio-open", 0);
11315 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread],
11316 "vFile:pread", "hostio-pread", 0);
11318 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite],
11319 "vFile:pwrite", "hostio-pwrite", 0);
11321 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close],
11322 "vFile:close", "hostio-close", 0);
11324 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink],
11325 "vFile:unlink", "hostio-unlink", 0);
11327 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_readlink],
11328 "vFile:readlink", "hostio-readlink", 0);
11330 add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach],
11331 "vAttach", "attach", 0);
11333 add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
11336 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode],
11337 "QStartNoAckMode", "noack", 0);
11339 add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill],
11340 "vKill", "kill", 0);
11342 add_packet_config_cmd (&remote_protocol_packets[PACKET_qAttached],
11343 "qAttached", "query-attached", 0);
11345 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalTracepoints],
11346 "ConditionalTracepoints",
11347 "conditional-tracepoints", 0);
11349 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalBreakpoints],
11350 "ConditionalBreakpoints",
11351 "conditional-breakpoints", 0);
11353 add_packet_config_cmd (&remote_protocol_packets[PACKET_FastTracepoints],
11354 "FastTracepoints", "fast-tracepoints", 0);
11356 add_packet_config_cmd (&remote_protocol_packets[PACKET_TracepointSource],
11357 "TracepointSource", "TracepointSource", 0);
11359 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAllow],
11360 "QAllow", "allow", 0);
11362 add_packet_config_cmd (&remote_protocol_packets[PACKET_StaticTracepoints],
11363 "StaticTracepoints", "static-tracepoints", 0);
11365 add_packet_config_cmd (&remote_protocol_packets[PACKET_InstallInTrace],
11366 "InstallInTrace", "install-in-trace", 0);
11368 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_statictrace_read],
11369 "qXfer:statictrace:read", "read-sdata-object", 0);
11371 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_fdpic],
11372 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
11374 add_packet_config_cmd (&remote_protocol_packets[PACKET_QDisableRandomization],
11375 "QDisableRandomization", "disable-randomization", 0);
11377 /* Keep the old ``set remote Z-packet ...'' working. Each individual
11378 Z sub-packet has its own set and show commands, but users may
11379 have sets to this variable in their .gdbinit files (or in their
11381 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
11382 &remote_Z_packet_detect, _("\
11383 Set use of remote protocol `Z' packets"), _("\
11384 Show use of remote protocol `Z' packets "), _("\
11385 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
11387 set_remote_protocol_Z_packet_cmd,
11388 show_remote_protocol_Z_packet_cmd,
11389 /* FIXME: i18n: Use of remote protocol
11390 `Z' packets is %s. */
11391 &remote_set_cmdlist, &remote_show_cmdlist);
11393 add_prefix_cmd ("remote", class_files, remote_command, _("\
11394 Manipulate files on the remote system\n\
11395 Transfer files to and from the remote target system."),
11396 &remote_cmdlist, "remote ",
11397 0 /* allow-unknown */, &cmdlist);
11399 add_cmd ("put", class_files, remote_put_command,
11400 _("Copy a local file to the remote system."),
11403 add_cmd ("get", class_files, remote_get_command,
11404 _("Copy a remote file to the local system."),
11407 add_cmd ("delete", class_files, remote_delete_command,
11408 _("Delete a remote file."),
11411 remote_exec_file = xstrdup ("");
11412 add_setshow_string_noescape_cmd ("exec-file", class_files,
11413 &remote_exec_file, _("\
11414 Set the remote pathname for \"run\""), _("\
11415 Show the remote pathname for \"run\""), NULL, NULL, NULL,
11416 &remote_set_cmdlist, &remote_show_cmdlist);
11418 /* Eventually initialize fileio. See fileio.c */
11419 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
11421 /* Take advantage of the fact that the LWP field is not used, to tag
11422 special ptids with it set to != 0. */
11423 magic_null_ptid = ptid_build (42000, 1, -1);
11424 not_sent_ptid = ptid_build (42000, 1, -2);
11425 any_thread_ptid = ptid_build (42000, 1, 0);
11427 target_buf_size = 2048;
11428 target_buf = xmalloc (target_buf_size);