Avoid software breakpoint's instruction shadow inconsistency
[deliverable/binutils-gdb.git] / gdb / remote.c
1 /* Remote target communications for serial-line targets in custom GDB protocol
2
3 Copyright (C) 1988-2014 Free Software Foundation, Inc.
4
5 This file is part of GDB.
6
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.
11
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.
16
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/>. */
19
20 /* See the GDB User Guide for details of the GDB remote protocol. */
21
22 #include "defs.h"
23 #include <ctype.h>
24 #include <fcntl.h>
25 #include "inferior.h"
26 #include "infrun.h"
27 #include "bfd.h"
28 #include "symfile.h"
29 #include "exceptions.h"
30 #include "target.h"
31 /*#include "terminal.h" */
32 #include "gdbcmd.h"
33 #include "objfiles.h"
34 #include "gdb-stabs.h"
35 #include "gdbthread.h"
36 #include "remote.h"
37 #include "remote-notif.h"
38 #include "regcache.h"
39 #include "value.h"
40 #include "observer.h"
41 #include "solib.h"
42 #include "cli/cli-decode.h"
43 #include "cli/cli-setshow.h"
44 #include "target-descriptions.h"
45 #include "gdb_bfd.h"
46 #include "filestuff.h"
47 #include "rsp-low.h"
48
49 #include <sys/time.h>
50
51 #include "event-loop.h"
52 #include "event-top.h"
53 #include "inf-loop.h"
54
55 #include <signal.h>
56 #include "serial.h"
57
58 #include "gdbcore.h" /* for exec_bfd */
59
60 #include "remote-fileio.h"
61 #include "gdb/fileio.h"
62 #include <sys/stat.h>
63 #include "xml-support.h"
64
65 #include "memory-map.h"
66
67 #include "tracepoint.h"
68 #include "ax.h"
69 #include "ax-gdb.h"
70 #include "agent.h"
71 #include "btrace.h"
72
73 /* Temp hacks for tracepoint encoding migration. */
74 static char *target_buf;
75 static long target_buf_size;
76
77 /* The size to align memory write packets, when practical. The protocol
78 does not guarantee any alignment, and gdb will generate short
79 writes and unaligned writes, but even as a best-effort attempt this
80 can improve bulk transfers. For instance, if a write is misaligned
81 relative to the target's data bus, the stub may need to make an extra
82 round trip fetching data from the target. This doesn't make a
83 huge difference, but it's easy to do, so we try to be helpful.
84
85 The alignment chosen is arbitrary; usually data bus width is
86 important here, not the possibly larger cache line size. */
87 enum { REMOTE_ALIGN_WRITES = 16 };
88
89 /* Prototypes for local functions. */
90 static void async_cleanup_sigint_signal_handler (void *dummy);
91 static int getpkt_sane (char **buf, long *sizeof_buf, int forever);
92 static int getpkt_or_notif_sane (char **buf, long *sizeof_buf,
93 int forever, int *is_notif);
94
95 static void async_handle_remote_sigint (int);
96 static void async_handle_remote_sigint_twice (int);
97
98 static void remote_files_info (struct target_ops *ignore);
99
100 static void remote_prepare_to_store (struct target_ops *self,
101 struct regcache *regcache);
102
103 static void remote_open_1 (const char *, int, struct target_ops *,
104 int extended_p);
105
106 static void remote_close (struct target_ops *self);
107
108 static void remote_mourn (struct target_ops *ops);
109
110 static void extended_remote_restart (void);
111
112 static void extended_remote_mourn (struct target_ops *);
113
114 static void remote_mourn_1 (struct target_ops *);
115
116 static void remote_send (char **buf, long *sizeof_buf_p);
117
118 static int readchar (int timeout);
119
120 static void remote_serial_write (const char *str, int len);
121
122 static void remote_kill (struct target_ops *ops);
123
124 static int remote_can_async_p (struct target_ops *);
125
126 static int remote_is_async_p (struct target_ops *);
127
128 static void remote_async (struct target_ops *ops,
129 void (*callback) (enum inferior_event_type event_type,
130 void *context),
131 void *context);
132
133 static void sync_remote_interrupt_twice (int signo);
134
135 static void interrupt_query (void);
136
137 static void set_general_thread (struct ptid ptid);
138 static void set_continue_thread (struct ptid ptid);
139
140 static void get_offsets (void);
141
142 static void skip_frame (void);
143
144 static long read_frame (char **buf_p, long *sizeof_buf);
145
146 static int hexnumlen (ULONGEST num);
147
148 static void init_remote_ops (void);
149
150 static void init_extended_remote_ops (void);
151
152 static void remote_stop (struct target_ops *self, ptid_t);
153
154 static int stubhex (int ch);
155
156 static int hexnumstr (char *, ULONGEST);
157
158 static int hexnumnstr (char *, ULONGEST, int);
159
160 static CORE_ADDR remote_address_masked (CORE_ADDR);
161
162 static void print_packet (const char *);
163
164 static void compare_sections_command (char *, int);
165
166 static void packet_command (char *, int);
167
168 static int stub_unpack_int (char *buff, int fieldlength);
169
170 static ptid_t remote_current_thread (ptid_t oldptid);
171
172 static void remote_find_new_threads (void);
173
174 static int putpkt_binary (const char *buf, int cnt);
175
176 static void check_binary_download (CORE_ADDR addr);
177
178 struct packet_config;
179
180 static void show_packet_config_cmd (struct packet_config *config);
181
182 static void show_remote_protocol_packet_cmd (struct ui_file *file,
183 int from_tty,
184 struct cmd_list_element *c,
185 const char *value);
186
187 static char *write_ptid (char *buf, const char *endbuf, ptid_t ptid);
188 static ptid_t read_ptid (char *buf, char **obuf);
189
190 static void remote_set_permissions (struct target_ops *self);
191
192 struct remote_state;
193 static int remote_get_trace_status (struct target_ops *self,
194 struct trace_status *ts);
195
196 static int remote_upload_tracepoints (struct target_ops *self,
197 struct uploaded_tp **utpp);
198
199 static int remote_upload_trace_state_variables (struct target_ops *self,
200 struct uploaded_tsv **utsvp);
201
202 static void remote_query_supported (void);
203
204 static void remote_check_symbols (void);
205
206 void _initialize_remote (void);
207
208 struct stop_reply;
209 static void stop_reply_xfree (struct stop_reply *);
210 static void remote_parse_stop_reply (char *, struct stop_reply *);
211 static void push_stop_reply (struct stop_reply *);
212 static void discard_pending_stop_replies_in_queue (struct remote_state *);
213 static int peek_stop_reply (ptid_t ptid);
214
215 static void remote_async_inferior_event_handler (gdb_client_data);
216
217 static void remote_terminal_ours (struct target_ops *self);
218
219 static int remote_read_description_p (struct target_ops *target);
220
221 static void remote_console_output (char *msg);
222
223 static int remote_supports_cond_breakpoints (struct target_ops *self);
224
225 static int remote_can_run_breakpoint_commands (struct target_ops *self);
226
227 /* For "remote". */
228
229 static struct cmd_list_element *remote_cmdlist;
230
231 /* For "set remote" and "show remote". */
232
233 static struct cmd_list_element *remote_set_cmdlist;
234 static struct cmd_list_element *remote_show_cmdlist;
235
236 /* Stub vCont actions support.
237
238 Each field is a boolean flag indicating whether the stub reports
239 support for the corresponding action. */
240
241 struct vCont_action_support
242 {
243 /* vCont;t */
244 int t;
245
246 /* vCont;r */
247 int r;
248 };
249
250 /* Controls whether GDB is willing to use range stepping. */
251
252 static int use_range_stepping = 1;
253
254 #define OPAQUETHREADBYTES 8
255
256 /* a 64 bit opaque identifier */
257 typedef unsigned char threadref[OPAQUETHREADBYTES];
258
259 /* About this many threadisds fit in a packet. */
260
261 #define MAXTHREADLISTRESULTS 32
262
263 /* Description of the remote protocol state for the currently
264 connected target. This is per-target state, and independent of the
265 selected architecture. */
266
267 struct remote_state
268 {
269 /* A buffer to use for incoming packets, and its current size. The
270 buffer is grown dynamically for larger incoming packets.
271 Outgoing packets may also be constructed in this buffer.
272 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
273 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
274 packets. */
275 char *buf;
276 long buf_size;
277
278 /* True if we're going through initial connection setup (finding out
279 about the remote side's threads, relocating symbols, etc.). */
280 int starting_up;
281
282 /* If we negotiated packet size explicitly (and thus can bypass
283 heuristics for the largest packet size that will not overflow
284 a buffer in the stub), this will be set to that packet size.
285 Otherwise zero, meaning to use the guessed size. */
286 long explicit_packet_size;
287
288 /* remote_wait is normally called when the target is running and
289 waits for a stop reply packet. But sometimes we need to call it
290 when the target is already stopped. We can send a "?" packet
291 and have remote_wait read the response. Or, if we already have
292 the response, we can stash it in BUF and tell remote_wait to
293 skip calling getpkt. This flag is set when BUF contains a
294 stop reply packet and the target is not waiting. */
295 int cached_wait_status;
296
297 /* True, if in no ack mode. That is, neither GDB nor the stub will
298 expect acks from each other. The connection is assumed to be
299 reliable. */
300 int noack_mode;
301
302 /* True if we're connected in extended remote mode. */
303 int extended;
304
305 /* True if we resumed the target and we're waiting for the target to
306 stop. In the mean time, we can't start another command/query.
307 The remote server wouldn't be ready to process it, so we'd
308 timeout waiting for a reply that would never come and eventually
309 we'd close the connection. This can happen in asynchronous mode
310 because we allow GDB commands while the target is running. */
311 int waiting_for_stop_reply;
312
313 /* The status of the stub support for the various vCont actions. */
314 struct vCont_action_support supports_vCont;
315
316 /* Nonzero if the user has pressed Ctrl-C, but the target hasn't
317 responded to that. */
318 int ctrlc_pending_p;
319
320 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
321 remote_open knows that we don't have a file open when the program
322 starts. */
323 struct serial *remote_desc;
324
325 /* These are the threads which we last sent to the remote system. The
326 TID member will be -1 for all or -2 for not sent yet. */
327 ptid_t general_thread;
328 ptid_t continue_thread;
329
330 /* This is the traceframe which we last selected on the remote system.
331 It will be -1 if no traceframe is selected. */
332 int remote_traceframe_number;
333
334 char *last_pass_packet;
335
336 /* The last QProgramSignals packet sent to the target. We bypass
337 sending a new program signals list down to the target if the new
338 packet is exactly the same as the last we sent. IOW, we only let
339 the target know about program signals list changes. */
340 char *last_program_signals_packet;
341
342 enum gdb_signal last_sent_signal;
343
344 int last_sent_step;
345
346 char *finished_object;
347 char *finished_annex;
348 ULONGEST finished_offset;
349
350 /* Should we try the 'ThreadInfo' query packet?
351
352 This variable (NOT available to the user: auto-detect only!)
353 determines whether GDB will use the new, simpler "ThreadInfo"
354 query or the older, more complex syntax for thread queries.
355 This is an auto-detect variable (set to true at each connect,
356 and set to false when the target fails to recognize it). */
357 int use_threadinfo_query;
358 int use_threadextra_query;
359
360 void (*async_client_callback) (enum inferior_event_type event_type,
361 void *context);
362 void *async_client_context;
363
364 /* This is set to the data address of the access causing the target
365 to stop for a watchpoint. */
366 CORE_ADDR remote_watch_data_address;
367
368 /* This is non-zero if target stopped for a watchpoint. */
369 int remote_stopped_by_watchpoint_p;
370
371 threadref echo_nextthread;
372 threadref nextthread;
373 threadref resultthreadlist[MAXTHREADLISTRESULTS];
374
375 /* The state of remote notification. */
376 struct remote_notif_state *notif_state;
377 };
378
379 /* Private data that we'll store in (struct thread_info)->private. */
380 struct private_thread_info
381 {
382 char *extra;
383 int core;
384 };
385
386 static void
387 free_private_thread_info (struct private_thread_info *info)
388 {
389 xfree (info->extra);
390 xfree (info);
391 }
392
393 /* This data could be associated with a target, but we do not always
394 have access to the current target when we need it, so for now it is
395 static. This will be fine for as long as only one target is in use
396 at a time. */
397 static struct remote_state *remote_state;
398
399 static struct remote_state *
400 get_remote_state_raw (void)
401 {
402 return remote_state;
403 }
404
405 /* Allocate a new struct remote_state with xmalloc, initialize it, and
406 return it. */
407
408 static struct remote_state *
409 new_remote_state (void)
410 {
411 struct remote_state *result = XCNEW (struct remote_state);
412
413 /* The default buffer size is unimportant; it will be expanded
414 whenever a larger buffer is needed. */
415 result->buf_size = 400;
416 result->buf = xmalloc (result->buf_size);
417 result->remote_traceframe_number = -1;
418 result->last_sent_signal = GDB_SIGNAL_0;
419
420 return result;
421 }
422
423 /* Description of the remote protocol for a given architecture. */
424
425 struct packet_reg
426 {
427 long offset; /* Offset into G packet. */
428 long regnum; /* GDB's internal register number. */
429 LONGEST pnum; /* Remote protocol register number. */
430 int in_g_packet; /* Always part of G packet. */
431 /* long size in bytes; == register_size (target_gdbarch (), regnum);
432 at present. */
433 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
434 at present. */
435 };
436
437 struct remote_arch_state
438 {
439 /* Description of the remote protocol registers. */
440 long sizeof_g_packet;
441
442 /* Description of the remote protocol registers indexed by REGNUM
443 (making an array gdbarch_num_regs in size). */
444 struct packet_reg *regs;
445
446 /* This is the size (in chars) of the first response to the ``g''
447 packet. It is used as a heuristic when determining the maximum
448 size of memory-read and memory-write packets. A target will
449 typically only reserve a buffer large enough to hold the ``g''
450 packet. The size does not include packet overhead (headers and
451 trailers). */
452 long actual_register_packet_size;
453
454 /* This is the maximum size (in chars) of a non read/write packet.
455 It is also used as a cap on the size of read/write packets. */
456 long remote_packet_size;
457 };
458
459 /* Utility: generate error from an incoming stub packet. */
460 static void
461 trace_error (char *buf)
462 {
463 if (*buf++ != 'E')
464 return; /* not an error msg */
465 switch (*buf)
466 {
467 case '1': /* malformed packet error */
468 if (*++buf == '0') /* general case: */
469 error (_("remote.c: error in outgoing packet."));
470 else
471 error (_("remote.c: error in outgoing packet at field #%ld."),
472 strtol (buf, NULL, 16));
473 default:
474 error (_("Target returns error code '%s'."), buf);
475 }
476 }
477
478 /* Utility: wait for reply from stub, while accepting "O" packets. */
479 static char *
480 remote_get_noisy_reply (char **buf_p,
481 long *sizeof_buf)
482 {
483 do /* Loop on reply from remote stub. */
484 {
485 char *buf;
486
487 QUIT; /* Allow user to bail out with ^C. */
488 getpkt (buf_p, sizeof_buf, 0);
489 buf = *buf_p;
490 if (buf[0] == 'E')
491 trace_error (buf);
492 else if (strncmp (buf, "qRelocInsn:", strlen ("qRelocInsn:")) == 0)
493 {
494 ULONGEST ul;
495 CORE_ADDR from, to, org_to;
496 char *p, *pp;
497 int adjusted_size = 0;
498 volatile struct gdb_exception ex;
499
500 p = buf + strlen ("qRelocInsn:");
501 pp = unpack_varlen_hex (p, &ul);
502 if (*pp != ';')
503 error (_("invalid qRelocInsn packet: %s"), buf);
504 from = ul;
505
506 p = pp + 1;
507 unpack_varlen_hex (p, &ul);
508 to = ul;
509
510 org_to = to;
511
512 TRY_CATCH (ex, RETURN_MASK_ALL)
513 {
514 gdbarch_relocate_instruction (target_gdbarch (), &to, from);
515 }
516 if (ex.reason >= 0)
517 {
518 adjusted_size = to - org_to;
519
520 xsnprintf (buf, *sizeof_buf, "qRelocInsn:%x", adjusted_size);
521 putpkt (buf);
522 }
523 else if (ex.reason < 0 && ex.error == MEMORY_ERROR)
524 {
525 /* Propagate memory errors silently back to the target.
526 The stub may have limited the range of addresses we
527 can write to, for example. */
528 putpkt ("E01");
529 }
530 else
531 {
532 /* Something unexpectedly bad happened. Be verbose so
533 we can tell what, and propagate the error back to the
534 stub, so it doesn't get stuck waiting for a
535 response. */
536 exception_fprintf (gdb_stderr, ex,
537 _("warning: relocating instruction: "));
538 putpkt ("E01");
539 }
540 }
541 else if (buf[0] == 'O' && buf[1] != 'K')
542 remote_console_output (buf + 1); /* 'O' message from stub */
543 else
544 return buf; /* Here's the actual reply. */
545 }
546 while (1);
547 }
548
549 /* Handle for retreving the remote protocol data from gdbarch. */
550 static struct gdbarch_data *remote_gdbarch_data_handle;
551
552 static struct remote_arch_state *
553 get_remote_arch_state (void)
554 {
555 return gdbarch_data (target_gdbarch (), remote_gdbarch_data_handle);
556 }
557
558 /* Fetch the global remote target state. */
559
560 static struct remote_state *
561 get_remote_state (void)
562 {
563 /* Make sure that the remote architecture state has been
564 initialized, because doing so might reallocate rs->buf. Any
565 function which calls getpkt also needs to be mindful of changes
566 to rs->buf, but this call limits the number of places which run
567 into trouble. */
568 get_remote_arch_state ();
569
570 return get_remote_state_raw ();
571 }
572
573 static int
574 compare_pnums (const void *lhs_, const void *rhs_)
575 {
576 const struct packet_reg * const *lhs = lhs_;
577 const struct packet_reg * const *rhs = rhs_;
578
579 if ((*lhs)->pnum < (*rhs)->pnum)
580 return -1;
581 else if ((*lhs)->pnum == (*rhs)->pnum)
582 return 0;
583 else
584 return 1;
585 }
586
587 static int
588 map_regcache_remote_table (struct gdbarch *gdbarch, struct packet_reg *regs)
589 {
590 int regnum, num_remote_regs, offset;
591 struct packet_reg **remote_regs;
592
593 for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++)
594 {
595 struct packet_reg *r = &regs[regnum];
596
597 if (register_size (gdbarch, regnum) == 0)
598 /* Do not try to fetch zero-sized (placeholder) registers. */
599 r->pnum = -1;
600 else
601 r->pnum = gdbarch_remote_register_number (gdbarch, regnum);
602
603 r->regnum = regnum;
604 }
605
606 /* Define the g/G packet format as the contents of each register
607 with a remote protocol number, in order of ascending protocol
608 number. */
609
610 remote_regs = alloca (gdbarch_num_regs (gdbarch)
611 * sizeof (struct packet_reg *));
612 for (num_remote_regs = 0, regnum = 0;
613 regnum < gdbarch_num_regs (gdbarch);
614 regnum++)
615 if (regs[regnum].pnum != -1)
616 remote_regs[num_remote_regs++] = &regs[regnum];
617
618 qsort (remote_regs, num_remote_regs, sizeof (struct packet_reg *),
619 compare_pnums);
620
621 for (regnum = 0, offset = 0; regnum < num_remote_regs; regnum++)
622 {
623 remote_regs[regnum]->in_g_packet = 1;
624 remote_regs[regnum]->offset = offset;
625 offset += register_size (gdbarch, remote_regs[regnum]->regnum);
626 }
627
628 return offset;
629 }
630
631 /* Given the architecture described by GDBARCH, return the remote
632 protocol register's number and the register's offset in the g/G
633 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
634 If the target does not have a mapping for REGNUM, return false,
635 otherwise, return true. */
636
637 int
638 remote_register_number_and_offset (struct gdbarch *gdbarch, int regnum,
639 int *pnum, int *poffset)
640 {
641 int sizeof_g_packet;
642 struct packet_reg *regs;
643 struct cleanup *old_chain;
644
645 gdb_assert (regnum < gdbarch_num_regs (gdbarch));
646
647 regs = xcalloc (gdbarch_num_regs (gdbarch), sizeof (struct packet_reg));
648 old_chain = make_cleanup (xfree, regs);
649
650 sizeof_g_packet = map_regcache_remote_table (gdbarch, regs);
651
652 *pnum = regs[regnum].pnum;
653 *poffset = regs[regnum].offset;
654
655 do_cleanups (old_chain);
656
657 return *pnum != -1;
658 }
659
660 static void *
661 init_remote_state (struct gdbarch *gdbarch)
662 {
663 struct remote_state *rs = get_remote_state_raw ();
664 struct remote_arch_state *rsa;
665
666 rsa = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_arch_state);
667
668 /* Use the architecture to build a regnum<->pnum table, which will be
669 1:1 unless a feature set specifies otherwise. */
670 rsa->regs = GDBARCH_OBSTACK_CALLOC (gdbarch,
671 gdbarch_num_regs (gdbarch),
672 struct packet_reg);
673
674 /* Record the maximum possible size of the g packet - it may turn out
675 to be smaller. */
676 rsa->sizeof_g_packet = map_regcache_remote_table (gdbarch, rsa->regs);
677
678 /* Default maximum number of characters in a packet body. Many
679 remote stubs have a hardwired buffer size of 400 bytes
680 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
681 as the maximum packet-size to ensure that the packet and an extra
682 NUL character can always fit in the buffer. This stops GDB
683 trashing stubs that try to squeeze an extra NUL into what is
684 already a full buffer (As of 1999-12-04 that was most stubs). */
685 rsa->remote_packet_size = 400 - 1;
686
687 /* This one is filled in when a ``g'' packet is received. */
688 rsa->actual_register_packet_size = 0;
689
690 /* Should rsa->sizeof_g_packet needs more space than the
691 default, adjust the size accordingly. Remember that each byte is
692 encoded as two characters. 32 is the overhead for the packet
693 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
694 (``$NN:G...#NN'') is a better guess, the below has been padded a
695 little. */
696 if (rsa->sizeof_g_packet > ((rsa->remote_packet_size - 32) / 2))
697 rsa->remote_packet_size = (rsa->sizeof_g_packet * 2 + 32);
698
699 /* Make sure that the packet buffer is plenty big enough for
700 this architecture. */
701 if (rs->buf_size < rsa->remote_packet_size)
702 {
703 rs->buf_size = 2 * rsa->remote_packet_size;
704 rs->buf = xrealloc (rs->buf, rs->buf_size);
705 }
706
707 return rsa;
708 }
709
710 /* Return the current allowed size of a remote packet. This is
711 inferred from the current architecture, and should be used to
712 limit the length of outgoing packets. */
713 static long
714 get_remote_packet_size (void)
715 {
716 struct remote_state *rs = get_remote_state ();
717 struct remote_arch_state *rsa = get_remote_arch_state ();
718
719 if (rs->explicit_packet_size)
720 return rs->explicit_packet_size;
721
722 return rsa->remote_packet_size;
723 }
724
725 static struct packet_reg *
726 packet_reg_from_regnum (struct remote_arch_state *rsa, long regnum)
727 {
728 if (regnum < 0 && regnum >= gdbarch_num_regs (target_gdbarch ()))
729 return NULL;
730 else
731 {
732 struct packet_reg *r = &rsa->regs[regnum];
733
734 gdb_assert (r->regnum == regnum);
735 return r;
736 }
737 }
738
739 static struct packet_reg *
740 packet_reg_from_pnum (struct remote_arch_state *rsa, LONGEST pnum)
741 {
742 int i;
743
744 for (i = 0; i < gdbarch_num_regs (target_gdbarch ()); i++)
745 {
746 struct packet_reg *r = &rsa->regs[i];
747
748 if (r->pnum == pnum)
749 return r;
750 }
751 return NULL;
752 }
753
754 static struct target_ops remote_ops;
755
756 static struct target_ops extended_remote_ops;
757
758 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
759 ``forever'' still use the normal timeout mechanism. This is
760 currently used by the ASYNC code to guarentee that target reads
761 during the initial connect always time-out. Once getpkt has been
762 modified to return a timeout indication and, in turn
763 remote_wait()/wait_for_inferior() have gained a timeout parameter
764 this can go away. */
765 static int wait_forever_enabled_p = 1;
766
767 /* Allow the user to specify what sequence to send to the remote
768 when he requests a program interruption: Although ^C is usually
769 what remote systems expect (this is the default, here), it is
770 sometimes preferable to send a break. On other systems such
771 as the Linux kernel, a break followed by g, which is Magic SysRq g
772 is required in order to interrupt the execution. */
773 const char interrupt_sequence_control_c[] = "Ctrl-C";
774 const char interrupt_sequence_break[] = "BREAK";
775 const char interrupt_sequence_break_g[] = "BREAK-g";
776 static const char *const interrupt_sequence_modes[] =
777 {
778 interrupt_sequence_control_c,
779 interrupt_sequence_break,
780 interrupt_sequence_break_g,
781 NULL
782 };
783 static const char *interrupt_sequence_mode = interrupt_sequence_control_c;
784
785 static void
786 show_interrupt_sequence (struct ui_file *file, int from_tty,
787 struct cmd_list_element *c,
788 const char *value)
789 {
790 if (interrupt_sequence_mode == interrupt_sequence_control_c)
791 fprintf_filtered (file,
792 _("Send the ASCII ETX character (Ctrl-c) "
793 "to the remote target to interrupt the "
794 "execution of the program.\n"));
795 else if (interrupt_sequence_mode == interrupt_sequence_break)
796 fprintf_filtered (file,
797 _("send a break signal to the remote target "
798 "to interrupt the execution of the program.\n"));
799 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
800 fprintf_filtered (file,
801 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
802 "the remote target to interrupt the execution "
803 "of Linux kernel.\n"));
804 else
805 internal_error (__FILE__, __LINE__,
806 _("Invalid value for interrupt_sequence_mode: %s."),
807 interrupt_sequence_mode);
808 }
809
810 /* This boolean variable specifies whether interrupt_sequence is sent
811 to the remote target when gdb connects to it.
812 This is mostly needed when you debug the Linux kernel: The Linux kernel
813 expects BREAK g which is Magic SysRq g for connecting gdb. */
814 static int interrupt_on_connect = 0;
815
816 /* This variable is used to implement the "set/show remotebreak" commands.
817 Since these commands are now deprecated in favor of "set/show remote
818 interrupt-sequence", it no longer has any effect on the code. */
819 static int remote_break;
820
821 static void
822 set_remotebreak (char *args, int from_tty, struct cmd_list_element *c)
823 {
824 if (remote_break)
825 interrupt_sequence_mode = interrupt_sequence_break;
826 else
827 interrupt_sequence_mode = interrupt_sequence_control_c;
828 }
829
830 static void
831 show_remotebreak (struct ui_file *file, int from_tty,
832 struct cmd_list_element *c,
833 const char *value)
834 {
835 }
836
837 /* This variable sets the number of bits in an address that are to be
838 sent in a memory ("M" or "m") packet. Normally, after stripping
839 leading zeros, the entire address would be sent. This variable
840 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
841 initial implementation of remote.c restricted the address sent in
842 memory packets to ``host::sizeof long'' bytes - (typically 32
843 bits). Consequently, for 64 bit targets, the upper 32 bits of an
844 address was never sent. Since fixing this bug may cause a break in
845 some remote targets this variable is principly provided to
846 facilitate backward compatibility. */
847
848 static unsigned int remote_address_size;
849
850 /* Temporary to track who currently owns the terminal. See
851 remote_terminal_* for more details. */
852
853 static int remote_async_terminal_ours_p;
854
855 /* The executable file to use for "run" on the remote side. */
856
857 static char *remote_exec_file = "";
858
859 \f
860 /* User configurable variables for the number of characters in a
861 memory read/write packet. MIN (rsa->remote_packet_size,
862 rsa->sizeof_g_packet) is the default. Some targets need smaller
863 values (fifo overruns, et.al.) and some users need larger values
864 (speed up transfers). The variables ``preferred_*'' (the user
865 request), ``current_*'' (what was actually set) and ``forced_*''
866 (Positive - a soft limit, negative - a hard limit). */
867
868 struct memory_packet_config
869 {
870 char *name;
871 long size;
872 int fixed_p;
873 };
874
875 /* Compute the current size of a read/write packet. Since this makes
876 use of ``actual_register_packet_size'' the computation is dynamic. */
877
878 static long
879 get_memory_packet_size (struct memory_packet_config *config)
880 {
881 struct remote_state *rs = get_remote_state ();
882 struct remote_arch_state *rsa = get_remote_arch_state ();
883
884 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
885 law?) that some hosts don't cope very well with large alloca()
886 calls. Eventually the alloca() code will be replaced by calls to
887 xmalloc() and make_cleanups() allowing this restriction to either
888 be lifted or removed. */
889 #ifndef MAX_REMOTE_PACKET_SIZE
890 #define MAX_REMOTE_PACKET_SIZE 16384
891 #endif
892 /* NOTE: 20 ensures we can write at least one byte. */
893 #ifndef MIN_REMOTE_PACKET_SIZE
894 #define MIN_REMOTE_PACKET_SIZE 20
895 #endif
896 long what_they_get;
897 if (config->fixed_p)
898 {
899 if (config->size <= 0)
900 what_they_get = MAX_REMOTE_PACKET_SIZE;
901 else
902 what_they_get = config->size;
903 }
904 else
905 {
906 what_they_get = get_remote_packet_size ();
907 /* Limit the packet to the size specified by the user. */
908 if (config->size > 0
909 && what_they_get > config->size)
910 what_they_get = config->size;
911
912 /* Limit it to the size of the targets ``g'' response unless we have
913 permission from the stub to use a larger packet size. */
914 if (rs->explicit_packet_size == 0
915 && rsa->actual_register_packet_size > 0
916 && what_they_get > rsa->actual_register_packet_size)
917 what_they_get = rsa->actual_register_packet_size;
918 }
919 if (what_they_get > MAX_REMOTE_PACKET_SIZE)
920 what_they_get = MAX_REMOTE_PACKET_SIZE;
921 if (what_they_get < MIN_REMOTE_PACKET_SIZE)
922 what_they_get = MIN_REMOTE_PACKET_SIZE;
923
924 /* Make sure there is room in the global buffer for this packet
925 (including its trailing NUL byte). */
926 if (rs->buf_size < what_they_get + 1)
927 {
928 rs->buf_size = 2 * what_they_get;
929 rs->buf = xrealloc (rs->buf, 2 * what_they_get);
930 }
931
932 return what_they_get;
933 }
934
935 /* Update the size of a read/write packet. If they user wants
936 something really big then do a sanity check. */
937
938 static void
939 set_memory_packet_size (char *args, struct memory_packet_config *config)
940 {
941 int fixed_p = config->fixed_p;
942 long size = config->size;
943
944 if (args == NULL)
945 error (_("Argument required (integer, `fixed' or `limited')."));
946 else if (strcmp (args, "hard") == 0
947 || strcmp (args, "fixed") == 0)
948 fixed_p = 1;
949 else if (strcmp (args, "soft") == 0
950 || strcmp (args, "limit") == 0)
951 fixed_p = 0;
952 else
953 {
954 char *end;
955
956 size = strtoul (args, &end, 0);
957 if (args == end)
958 error (_("Invalid %s (bad syntax)."), config->name);
959 #if 0
960 /* Instead of explicitly capping the size of a packet to
961 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
962 instead allowed to set the size to something arbitrarily
963 large. */
964 if (size > MAX_REMOTE_PACKET_SIZE)
965 error (_("Invalid %s (too large)."), config->name);
966 #endif
967 }
968 /* Extra checks? */
969 if (fixed_p && !config->fixed_p)
970 {
971 if (! query (_("The target may not be able to correctly handle a %s\n"
972 "of %ld bytes. Change the packet size? "),
973 config->name, size))
974 error (_("Packet size not changed."));
975 }
976 /* Update the config. */
977 config->fixed_p = fixed_p;
978 config->size = size;
979 }
980
981 static void
982 show_memory_packet_size (struct memory_packet_config *config)
983 {
984 printf_filtered (_("The %s is %ld. "), config->name, config->size);
985 if (config->fixed_p)
986 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
987 get_memory_packet_size (config));
988 else
989 printf_filtered (_("Packets are limited to %ld bytes.\n"),
990 get_memory_packet_size (config));
991 }
992
993 static struct memory_packet_config memory_write_packet_config =
994 {
995 "memory-write-packet-size",
996 };
997
998 static void
999 set_memory_write_packet_size (char *args, int from_tty)
1000 {
1001 set_memory_packet_size (args, &memory_write_packet_config);
1002 }
1003
1004 static void
1005 show_memory_write_packet_size (char *args, int from_tty)
1006 {
1007 show_memory_packet_size (&memory_write_packet_config);
1008 }
1009
1010 static long
1011 get_memory_write_packet_size (void)
1012 {
1013 return get_memory_packet_size (&memory_write_packet_config);
1014 }
1015
1016 static struct memory_packet_config memory_read_packet_config =
1017 {
1018 "memory-read-packet-size",
1019 };
1020
1021 static void
1022 set_memory_read_packet_size (char *args, int from_tty)
1023 {
1024 set_memory_packet_size (args, &memory_read_packet_config);
1025 }
1026
1027 static void
1028 show_memory_read_packet_size (char *args, int from_tty)
1029 {
1030 show_memory_packet_size (&memory_read_packet_config);
1031 }
1032
1033 static long
1034 get_memory_read_packet_size (void)
1035 {
1036 long size = get_memory_packet_size (&memory_read_packet_config);
1037
1038 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1039 extra buffer size argument before the memory read size can be
1040 increased beyond this. */
1041 if (size > get_remote_packet_size ())
1042 size = get_remote_packet_size ();
1043 return size;
1044 }
1045
1046 \f
1047 /* Generic configuration support for packets the stub optionally
1048 supports. Allows the user to specify the use of the packet as well
1049 as allowing GDB to auto-detect support in the remote stub. */
1050
1051 enum packet_support
1052 {
1053 PACKET_SUPPORT_UNKNOWN = 0,
1054 PACKET_ENABLE,
1055 PACKET_DISABLE
1056 };
1057
1058 struct packet_config
1059 {
1060 const char *name;
1061 const char *title;
1062
1063 /* If auto, GDB auto-detects support for this packet or feature,
1064 either through qSupported, or by trying the packet and looking
1065 at the response. If true, GDB assumes the target supports this
1066 packet. If false, the packet is disabled. Configs that don't
1067 have an associated command always have this set to auto. */
1068 enum auto_boolean detect;
1069
1070 /* Does the target support this packet? */
1071 enum packet_support support;
1072 };
1073
1074 /* Analyze a packet's return value and update the packet config
1075 accordingly. */
1076
1077 enum packet_result
1078 {
1079 PACKET_ERROR,
1080 PACKET_OK,
1081 PACKET_UNKNOWN
1082 };
1083
1084 static enum packet_support packet_config_support (struct packet_config *config);
1085 static enum packet_support packet_support (int packet);
1086
1087 static void
1088 show_packet_config_cmd (struct packet_config *config)
1089 {
1090 char *support = "internal-error";
1091
1092 switch (packet_config_support (config))
1093 {
1094 case PACKET_ENABLE:
1095 support = "enabled";
1096 break;
1097 case PACKET_DISABLE:
1098 support = "disabled";
1099 break;
1100 case PACKET_SUPPORT_UNKNOWN:
1101 support = "unknown";
1102 break;
1103 }
1104 switch (config->detect)
1105 {
1106 case AUTO_BOOLEAN_AUTO:
1107 printf_filtered (_("Support for the `%s' packet "
1108 "is auto-detected, currently %s.\n"),
1109 config->name, support);
1110 break;
1111 case AUTO_BOOLEAN_TRUE:
1112 case AUTO_BOOLEAN_FALSE:
1113 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1114 config->name, support);
1115 break;
1116 }
1117 }
1118
1119 static void
1120 add_packet_config_cmd (struct packet_config *config, const char *name,
1121 const char *title, int legacy)
1122 {
1123 char *set_doc;
1124 char *show_doc;
1125 char *cmd_name;
1126
1127 config->name = name;
1128 config->title = title;
1129 set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1130 name, title);
1131 show_doc = xstrprintf ("Show current use of remote "
1132 "protocol `%s' (%s) packet",
1133 name, title);
1134 /* set/show TITLE-packet {auto,on,off} */
1135 cmd_name = xstrprintf ("%s-packet", title);
1136 add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
1137 &config->detect, set_doc,
1138 show_doc, NULL, /* help_doc */
1139 NULL,
1140 show_remote_protocol_packet_cmd,
1141 &remote_set_cmdlist, &remote_show_cmdlist);
1142 /* The command code copies the documentation strings. */
1143 xfree (set_doc);
1144 xfree (show_doc);
1145 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1146 if (legacy)
1147 {
1148 char *legacy_name;
1149
1150 legacy_name = xstrprintf ("%s-packet", name);
1151 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1152 &remote_set_cmdlist);
1153 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1154 &remote_show_cmdlist);
1155 }
1156 }
1157
1158 static enum packet_result
1159 packet_check_result (const char *buf)
1160 {
1161 if (buf[0] != '\0')
1162 {
1163 /* The stub recognized the packet request. Check that the
1164 operation succeeded. */
1165 if (buf[0] == 'E'
1166 && isxdigit (buf[1]) && isxdigit (buf[2])
1167 && buf[3] == '\0')
1168 /* "Enn" - definitly an error. */
1169 return PACKET_ERROR;
1170
1171 /* Always treat "E." as an error. This will be used for
1172 more verbose error messages, such as E.memtypes. */
1173 if (buf[0] == 'E' && buf[1] == '.')
1174 return PACKET_ERROR;
1175
1176 /* The packet may or may not be OK. Just assume it is. */
1177 return PACKET_OK;
1178 }
1179 else
1180 /* The stub does not support the packet. */
1181 return PACKET_UNKNOWN;
1182 }
1183
1184 static enum packet_result
1185 packet_ok (const char *buf, struct packet_config *config)
1186 {
1187 enum packet_result result;
1188
1189 if (config->detect != AUTO_BOOLEAN_TRUE
1190 && config->support == PACKET_DISABLE)
1191 internal_error (__FILE__, __LINE__,
1192 _("packet_ok: attempt to use a disabled packet"));
1193
1194 result = packet_check_result (buf);
1195 switch (result)
1196 {
1197 case PACKET_OK:
1198 case PACKET_ERROR:
1199 /* The stub recognized the packet request. */
1200 if (config->support == PACKET_SUPPORT_UNKNOWN)
1201 {
1202 if (remote_debug)
1203 fprintf_unfiltered (gdb_stdlog,
1204 "Packet %s (%s) is supported\n",
1205 config->name, config->title);
1206 config->support = PACKET_ENABLE;
1207 }
1208 break;
1209 case PACKET_UNKNOWN:
1210 /* The stub does not support the packet. */
1211 if (config->detect == AUTO_BOOLEAN_AUTO
1212 && config->support == PACKET_ENABLE)
1213 {
1214 /* If the stub previously indicated that the packet was
1215 supported then there is a protocol error. */
1216 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1217 config->name, config->title);
1218 }
1219 else if (config->detect == AUTO_BOOLEAN_TRUE)
1220 {
1221 /* The user set it wrong. */
1222 error (_("Enabled packet %s (%s) not recognized by stub"),
1223 config->name, config->title);
1224 }
1225
1226 if (remote_debug)
1227 fprintf_unfiltered (gdb_stdlog,
1228 "Packet %s (%s) is NOT supported\n",
1229 config->name, config->title);
1230 config->support = PACKET_DISABLE;
1231 break;
1232 }
1233
1234 return result;
1235 }
1236
1237 enum {
1238 PACKET_vCont = 0,
1239 PACKET_X,
1240 PACKET_qSymbol,
1241 PACKET_P,
1242 PACKET_p,
1243 PACKET_Z0,
1244 PACKET_Z1,
1245 PACKET_Z2,
1246 PACKET_Z3,
1247 PACKET_Z4,
1248 PACKET_vFile_open,
1249 PACKET_vFile_pread,
1250 PACKET_vFile_pwrite,
1251 PACKET_vFile_close,
1252 PACKET_vFile_unlink,
1253 PACKET_vFile_readlink,
1254 PACKET_qXfer_auxv,
1255 PACKET_qXfer_features,
1256 PACKET_qXfer_libraries,
1257 PACKET_qXfer_libraries_svr4,
1258 PACKET_qXfer_memory_map,
1259 PACKET_qXfer_spu_read,
1260 PACKET_qXfer_spu_write,
1261 PACKET_qXfer_osdata,
1262 PACKET_qXfer_threads,
1263 PACKET_qXfer_statictrace_read,
1264 PACKET_qXfer_traceframe_info,
1265 PACKET_qXfer_uib,
1266 PACKET_qGetTIBAddr,
1267 PACKET_qGetTLSAddr,
1268 PACKET_qSupported,
1269 PACKET_qTStatus,
1270 PACKET_QPassSignals,
1271 PACKET_QProgramSignals,
1272 PACKET_qCRC,
1273 PACKET_qSearch_memory,
1274 PACKET_vAttach,
1275 PACKET_vRun,
1276 PACKET_QStartNoAckMode,
1277 PACKET_vKill,
1278 PACKET_qXfer_siginfo_read,
1279 PACKET_qXfer_siginfo_write,
1280 PACKET_qAttached,
1281
1282 /* Support for conditional tracepoints. */
1283 PACKET_ConditionalTracepoints,
1284
1285 /* Support for target-side breakpoint conditions. */
1286 PACKET_ConditionalBreakpoints,
1287
1288 /* Support for target-side breakpoint commands. */
1289 PACKET_BreakpointCommands,
1290
1291 /* Support for fast tracepoints. */
1292 PACKET_FastTracepoints,
1293
1294 /* Support for static tracepoints. */
1295 PACKET_StaticTracepoints,
1296
1297 /* Support for installing tracepoints while a trace experiment is
1298 running. */
1299 PACKET_InstallInTrace,
1300
1301 PACKET_bc,
1302 PACKET_bs,
1303 PACKET_TracepointSource,
1304 PACKET_QAllow,
1305 PACKET_qXfer_fdpic,
1306 PACKET_QDisableRandomization,
1307 PACKET_QAgent,
1308 PACKET_QTBuffer_size,
1309 PACKET_Qbtrace_off,
1310 PACKET_Qbtrace_bts,
1311 PACKET_qXfer_btrace,
1312
1313 /* Support for the QNonStop packet. */
1314 PACKET_QNonStop,
1315
1316 /* Support for multi-process extensions. */
1317 PACKET_multiprocess_feature,
1318
1319 /* Support for enabling and disabling tracepoints while a trace
1320 experiment is running. */
1321 PACKET_EnableDisableTracepoints_feature,
1322
1323 /* Support for collecting strings using the tracenz bytecode. */
1324 PACKET_tracenz_feature,
1325
1326 /* Support for continuing to run a trace experiment while GDB is
1327 disconnected. */
1328 PACKET_DisconnectedTracing_feature,
1329
1330 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
1331 PACKET_augmented_libraries_svr4_read_feature,
1332
1333 PACKET_MAX
1334 };
1335
1336 static struct packet_config remote_protocol_packets[PACKET_MAX];
1337
1338 /* Returns whether a given packet or feature is supported. This takes
1339 into account the state of the corresponding "set remote foo-packet"
1340 command, which may be used to bypass auto-detection. */
1341
1342 static enum packet_support
1343 packet_config_support (struct packet_config *config)
1344 {
1345 switch (config->detect)
1346 {
1347 case AUTO_BOOLEAN_TRUE:
1348 return PACKET_ENABLE;
1349 case AUTO_BOOLEAN_FALSE:
1350 return PACKET_DISABLE;
1351 case AUTO_BOOLEAN_AUTO:
1352 return config->support;
1353 default:
1354 gdb_assert_not_reached (_("bad switch"));
1355 }
1356 }
1357
1358 /* Same as packet_config_support, but takes the packet's enum value as
1359 argument. */
1360
1361 static enum packet_support
1362 packet_support (int packet)
1363 {
1364 struct packet_config *config = &remote_protocol_packets[packet];
1365
1366 return packet_config_support (config);
1367 }
1368
1369 static void
1370 show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty,
1371 struct cmd_list_element *c,
1372 const char *value)
1373 {
1374 struct packet_config *packet;
1375
1376 for (packet = remote_protocol_packets;
1377 packet < &remote_protocol_packets[PACKET_MAX];
1378 packet++)
1379 {
1380 if (&packet->detect == c->var)
1381 {
1382 show_packet_config_cmd (packet);
1383 return;
1384 }
1385 }
1386 internal_error (__FILE__, __LINE__, _("Could not find config for %s"),
1387 c->name);
1388 }
1389
1390 /* Should we try one of the 'Z' requests? */
1391
1392 enum Z_packet_type
1393 {
1394 Z_PACKET_SOFTWARE_BP,
1395 Z_PACKET_HARDWARE_BP,
1396 Z_PACKET_WRITE_WP,
1397 Z_PACKET_READ_WP,
1398 Z_PACKET_ACCESS_WP,
1399 NR_Z_PACKET_TYPES
1400 };
1401
1402 /* For compatibility with older distributions. Provide a ``set remote
1403 Z-packet ...'' command that updates all the Z packet types. */
1404
1405 static enum auto_boolean remote_Z_packet_detect;
1406
1407 static void
1408 set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
1409 struct cmd_list_element *c)
1410 {
1411 int i;
1412
1413 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1414 remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect;
1415 }
1416
1417 static void
1418 show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty,
1419 struct cmd_list_element *c,
1420 const char *value)
1421 {
1422 int i;
1423
1424 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1425 {
1426 show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]);
1427 }
1428 }
1429
1430 /* Returns true if the multi-process extensions are in effect. */
1431
1432 static int
1433 remote_multi_process_p (struct remote_state *rs)
1434 {
1435 return packet_support (PACKET_multiprocess_feature) == PACKET_ENABLE;
1436 }
1437
1438 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1439 static struct async_signal_handler *async_sigint_remote_twice_token;
1440 static struct async_signal_handler *async_sigint_remote_token;
1441
1442 \f
1443 /* Asynchronous signal handle registered as event loop source for
1444 when we have pending events ready to be passed to the core. */
1445
1446 static struct async_event_handler *remote_async_inferior_event_token;
1447
1448 \f
1449
1450 static ptid_t magic_null_ptid;
1451 static ptid_t not_sent_ptid;
1452 static ptid_t any_thread_ptid;
1453
1454 /* Find out if the stub attached to PID (and hence GDB should offer to
1455 detach instead of killing it when bailing out). */
1456
1457 static int
1458 remote_query_attached (int pid)
1459 {
1460 struct remote_state *rs = get_remote_state ();
1461 size_t size = get_remote_packet_size ();
1462
1463 if (packet_support (PACKET_qAttached) == PACKET_DISABLE)
1464 return 0;
1465
1466 if (remote_multi_process_p (rs))
1467 xsnprintf (rs->buf, size, "qAttached:%x", pid);
1468 else
1469 xsnprintf (rs->buf, size, "qAttached");
1470
1471 putpkt (rs->buf);
1472 getpkt (&rs->buf, &rs->buf_size, 0);
1473
1474 switch (packet_ok (rs->buf,
1475 &remote_protocol_packets[PACKET_qAttached]))
1476 {
1477 case PACKET_OK:
1478 if (strcmp (rs->buf, "1") == 0)
1479 return 1;
1480 break;
1481 case PACKET_ERROR:
1482 warning (_("Remote failure reply: %s"), rs->buf);
1483 break;
1484 case PACKET_UNKNOWN:
1485 break;
1486 }
1487
1488 return 0;
1489 }
1490
1491 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
1492 has been invented by GDB, instead of reported by the target. Since
1493 we can be connected to a remote system before before knowing about
1494 any inferior, mark the target with execution when we find the first
1495 inferior. If ATTACHED is 1, then we had just attached to this
1496 inferior. If it is 0, then we just created this inferior. If it
1497 is -1, then try querying the remote stub to find out if it had
1498 attached to the inferior or not. */
1499
1500 static struct inferior *
1501 remote_add_inferior (int fake_pid_p, int pid, int attached)
1502 {
1503 struct inferior *inf;
1504
1505 /* Check whether this process we're learning about is to be
1506 considered attached, or if is to be considered to have been
1507 spawned by the stub. */
1508 if (attached == -1)
1509 attached = remote_query_attached (pid);
1510
1511 if (gdbarch_has_global_solist (target_gdbarch ()))
1512 {
1513 /* If the target shares code across all inferiors, then every
1514 attach adds a new inferior. */
1515 inf = add_inferior (pid);
1516
1517 /* ... and every inferior is bound to the same program space.
1518 However, each inferior may still have its own address
1519 space. */
1520 inf->aspace = maybe_new_address_space ();
1521 inf->pspace = current_program_space;
1522 }
1523 else
1524 {
1525 /* In the traditional debugging scenario, there's a 1-1 match
1526 between program/address spaces. We simply bind the inferior
1527 to the program space's address space. */
1528 inf = current_inferior ();
1529 inferior_appeared (inf, pid);
1530 }
1531
1532 inf->attach_flag = attached;
1533 inf->fake_pid_p = fake_pid_p;
1534
1535 return inf;
1536 }
1537
1538 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1539 according to RUNNING. */
1540
1541 static void
1542 remote_add_thread (ptid_t ptid, int running)
1543 {
1544 struct remote_state *rs = get_remote_state ();
1545
1546 /* GDB historically didn't pull threads in the initial connection
1547 setup. If the remote target doesn't even have a concept of
1548 threads (e.g., a bare-metal target), even if internally we
1549 consider that a single-threaded target, mentioning a new thread
1550 might be confusing to the user. Be silent then, preserving the
1551 age old behavior. */
1552 if (rs->starting_up)
1553 add_thread_silent (ptid);
1554 else
1555 add_thread (ptid);
1556
1557 set_executing (ptid, running);
1558 set_running (ptid, running);
1559 }
1560
1561 /* Come here when we learn about a thread id from the remote target.
1562 It may be the first time we hear about such thread, so take the
1563 opportunity to add it to GDB's thread list. In case this is the
1564 first time we're noticing its corresponding inferior, add it to
1565 GDB's inferior list as well. */
1566
1567 static void
1568 remote_notice_new_inferior (ptid_t currthread, int running)
1569 {
1570 /* If this is a new thread, add it to GDB's thread list.
1571 If we leave it up to WFI to do this, bad things will happen. */
1572
1573 if (in_thread_list (currthread) && is_exited (currthread))
1574 {
1575 /* We're seeing an event on a thread id we knew had exited.
1576 This has to be a new thread reusing the old id. Add it. */
1577 remote_add_thread (currthread, running);
1578 return;
1579 }
1580
1581 if (!in_thread_list (currthread))
1582 {
1583 struct inferior *inf = NULL;
1584 int pid = ptid_get_pid (currthread);
1585
1586 if (ptid_is_pid (inferior_ptid)
1587 && pid == ptid_get_pid (inferior_ptid))
1588 {
1589 /* inferior_ptid has no thread member yet. This can happen
1590 with the vAttach -> remote_wait,"TAAthread:" path if the
1591 stub doesn't support qC. This is the first stop reported
1592 after an attach, so this is the main thread. Update the
1593 ptid in the thread list. */
1594 if (in_thread_list (pid_to_ptid (pid)))
1595 thread_change_ptid (inferior_ptid, currthread);
1596 else
1597 {
1598 remote_add_thread (currthread, running);
1599 inferior_ptid = currthread;
1600 }
1601 return;
1602 }
1603
1604 if (ptid_equal (magic_null_ptid, inferior_ptid))
1605 {
1606 /* inferior_ptid is not set yet. This can happen with the
1607 vRun -> remote_wait,"TAAthread:" path if the stub
1608 doesn't support qC. This is the first stop reported
1609 after an attach, so this is the main thread. Update the
1610 ptid in the thread list. */
1611 thread_change_ptid (inferior_ptid, currthread);
1612 return;
1613 }
1614
1615 /* When connecting to a target remote, or to a target
1616 extended-remote which already was debugging an inferior, we
1617 may not know about it yet. Add it before adding its child
1618 thread, so notifications are emitted in a sensible order. */
1619 if (!in_inferior_list (ptid_get_pid (currthread)))
1620 {
1621 struct remote_state *rs = get_remote_state ();
1622 int fake_pid_p = !remote_multi_process_p (rs);
1623
1624 inf = remote_add_inferior (fake_pid_p,
1625 ptid_get_pid (currthread), -1);
1626 }
1627
1628 /* This is really a new thread. Add it. */
1629 remote_add_thread (currthread, running);
1630
1631 /* If we found a new inferior, let the common code do whatever
1632 it needs to with it (e.g., read shared libraries, insert
1633 breakpoints), unless we're just setting up an all-stop
1634 connection. */
1635 if (inf != NULL)
1636 {
1637 struct remote_state *rs = get_remote_state ();
1638
1639 if (non_stop || !rs->starting_up)
1640 notice_new_inferior (currthread, running, 0);
1641 }
1642 }
1643 }
1644
1645 /* Return the private thread data, creating it if necessary. */
1646
1647 static struct private_thread_info *
1648 demand_private_info (ptid_t ptid)
1649 {
1650 struct thread_info *info = find_thread_ptid (ptid);
1651
1652 gdb_assert (info);
1653
1654 if (!info->private)
1655 {
1656 info->private = xmalloc (sizeof (*(info->private)));
1657 info->private_dtor = free_private_thread_info;
1658 info->private->core = -1;
1659 info->private->extra = 0;
1660 }
1661
1662 return info->private;
1663 }
1664
1665 /* Call this function as a result of
1666 1) A halt indication (T packet) containing a thread id
1667 2) A direct query of currthread
1668 3) Successful execution of set thread */
1669
1670 static void
1671 record_currthread (struct remote_state *rs, ptid_t currthread)
1672 {
1673 rs->general_thread = currthread;
1674 }
1675
1676 /* If 'QPassSignals' is supported, tell the remote stub what signals
1677 it can simply pass through to the inferior without reporting. */
1678
1679 static void
1680 remote_pass_signals (struct target_ops *self,
1681 int numsigs, unsigned char *pass_signals)
1682 {
1683 if (packet_support (PACKET_QPassSignals) != PACKET_DISABLE)
1684 {
1685 char *pass_packet, *p;
1686 int count = 0, i;
1687 struct remote_state *rs = get_remote_state ();
1688
1689 gdb_assert (numsigs < 256);
1690 for (i = 0; i < numsigs; i++)
1691 {
1692 if (pass_signals[i])
1693 count++;
1694 }
1695 pass_packet = xmalloc (count * 3 + strlen ("QPassSignals:") + 1);
1696 strcpy (pass_packet, "QPassSignals:");
1697 p = pass_packet + strlen (pass_packet);
1698 for (i = 0; i < numsigs; i++)
1699 {
1700 if (pass_signals[i])
1701 {
1702 if (i >= 16)
1703 *p++ = tohex (i >> 4);
1704 *p++ = tohex (i & 15);
1705 if (count)
1706 *p++ = ';';
1707 else
1708 break;
1709 count--;
1710 }
1711 }
1712 *p = 0;
1713 if (!rs->last_pass_packet || strcmp (rs->last_pass_packet, pass_packet))
1714 {
1715 putpkt (pass_packet);
1716 getpkt (&rs->buf, &rs->buf_size, 0);
1717 packet_ok (rs->buf, &remote_protocol_packets[PACKET_QPassSignals]);
1718 if (rs->last_pass_packet)
1719 xfree (rs->last_pass_packet);
1720 rs->last_pass_packet = pass_packet;
1721 }
1722 else
1723 xfree (pass_packet);
1724 }
1725 }
1726
1727 /* If 'QProgramSignals' is supported, tell the remote stub what
1728 signals it should pass through to the inferior when detaching. */
1729
1730 static void
1731 remote_program_signals (struct target_ops *self,
1732 int numsigs, unsigned char *signals)
1733 {
1734 if (packet_support (PACKET_QProgramSignals) != PACKET_DISABLE)
1735 {
1736 char *packet, *p;
1737 int count = 0, i;
1738 struct remote_state *rs = get_remote_state ();
1739
1740 gdb_assert (numsigs < 256);
1741 for (i = 0; i < numsigs; i++)
1742 {
1743 if (signals[i])
1744 count++;
1745 }
1746 packet = xmalloc (count * 3 + strlen ("QProgramSignals:") + 1);
1747 strcpy (packet, "QProgramSignals:");
1748 p = packet + strlen (packet);
1749 for (i = 0; i < numsigs; i++)
1750 {
1751 if (signal_pass_state (i))
1752 {
1753 if (i >= 16)
1754 *p++ = tohex (i >> 4);
1755 *p++ = tohex (i & 15);
1756 if (count)
1757 *p++ = ';';
1758 else
1759 break;
1760 count--;
1761 }
1762 }
1763 *p = 0;
1764 if (!rs->last_program_signals_packet
1765 || strcmp (rs->last_program_signals_packet, packet) != 0)
1766 {
1767 putpkt (packet);
1768 getpkt (&rs->buf, &rs->buf_size, 0);
1769 packet_ok (rs->buf, &remote_protocol_packets[PACKET_QProgramSignals]);
1770 xfree (rs->last_program_signals_packet);
1771 rs->last_program_signals_packet = packet;
1772 }
1773 else
1774 xfree (packet);
1775 }
1776 }
1777
1778 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
1779 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
1780 thread. If GEN is set, set the general thread, if not, then set
1781 the step/continue thread. */
1782 static void
1783 set_thread (struct ptid ptid, int gen)
1784 {
1785 struct remote_state *rs = get_remote_state ();
1786 ptid_t state = gen ? rs->general_thread : rs->continue_thread;
1787 char *buf = rs->buf;
1788 char *endbuf = rs->buf + get_remote_packet_size ();
1789
1790 if (ptid_equal (state, ptid))
1791 return;
1792
1793 *buf++ = 'H';
1794 *buf++ = gen ? 'g' : 'c';
1795 if (ptid_equal (ptid, magic_null_ptid))
1796 xsnprintf (buf, endbuf - buf, "0");
1797 else if (ptid_equal (ptid, any_thread_ptid))
1798 xsnprintf (buf, endbuf - buf, "0");
1799 else if (ptid_equal (ptid, minus_one_ptid))
1800 xsnprintf (buf, endbuf - buf, "-1");
1801 else
1802 write_ptid (buf, endbuf, ptid);
1803 putpkt (rs->buf);
1804 getpkt (&rs->buf, &rs->buf_size, 0);
1805 if (gen)
1806 rs->general_thread = ptid;
1807 else
1808 rs->continue_thread = ptid;
1809 }
1810
1811 static void
1812 set_general_thread (struct ptid ptid)
1813 {
1814 set_thread (ptid, 1);
1815 }
1816
1817 static void
1818 set_continue_thread (struct ptid ptid)
1819 {
1820 set_thread (ptid, 0);
1821 }
1822
1823 /* Change the remote current process. Which thread within the process
1824 ends up selected isn't important, as long as it is the same process
1825 as what INFERIOR_PTID points to.
1826
1827 This comes from that fact that there is no explicit notion of
1828 "selected process" in the protocol. The selected process for
1829 general operations is the process the selected general thread
1830 belongs to. */
1831
1832 static void
1833 set_general_process (void)
1834 {
1835 struct remote_state *rs = get_remote_state ();
1836
1837 /* If the remote can't handle multiple processes, don't bother. */
1838 if (!rs->extended || !remote_multi_process_p (rs))
1839 return;
1840
1841 /* We only need to change the remote current thread if it's pointing
1842 at some other process. */
1843 if (ptid_get_pid (rs->general_thread) != ptid_get_pid (inferior_ptid))
1844 set_general_thread (inferior_ptid);
1845 }
1846
1847 \f
1848 /* Return nonzero if the thread PTID is still alive on the remote
1849 system. */
1850
1851 static int
1852 remote_thread_alive (struct target_ops *ops, ptid_t ptid)
1853 {
1854 struct remote_state *rs = get_remote_state ();
1855 char *p, *endp;
1856
1857 if (ptid_equal (ptid, magic_null_ptid))
1858 /* The main thread is always alive. */
1859 return 1;
1860
1861 if (ptid_get_pid (ptid) != 0 && ptid_get_lwp (ptid) == 0)
1862 /* The main thread is always alive. This can happen after a
1863 vAttach, if the remote side doesn't support
1864 multi-threading. */
1865 return 1;
1866
1867 p = rs->buf;
1868 endp = rs->buf + get_remote_packet_size ();
1869
1870 *p++ = 'T';
1871 write_ptid (p, endp, ptid);
1872
1873 putpkt (rs->buf);
1874 getpkt (&rs->buf, &rs->buf_size, 0);
1875 return (rs->buf[0] == 'O' && rs->buf[1] == 'K');
1876 }
1877
1878 /* About these extended threadlist and threadinfo packets. They are
1879 variable length packets but, the fields within them are often fixed
1880 length. They are redundent enough to send over UDP as is the
1881 remote protocol in general. There is a matching unit test module
1882 in libstub. */
1883
1884 /* WARNING: This threadref data structure comes from the remote O.S.,
1885 libstub protocol encoding, and remote.c. It is not particularly
1886 changable. */
1887
1888 /* Right now, the internal structure is int. We want it to be bigger.
1889 Plan to fix this. */
1890
1891 typedef int gdb_threadref; /* Internal GDB thread reference. */
1892
1893 /* gdb_ext_thread_info is an internal GDB data structure which is
1894 equivalent to the reply of the remote threadinfo packet. */
1895
1896 struct gdb_ext_thread_info
1897 {
1898 threadref threadid; /* External form of thread reference. */
1899 int active; /* Has state interesting to GDB?
1900 regs, stack. */
1901 char display[256]; /* Brief state display, name,
1902 blocked/suspended. */
1903 char shortname[32]; /* To be used to name threads. */
1904 char more_display[256]; /* Long info, statistics, queue depth,
1905 whatever. */
1906 };
1907
1908 /* The volume of remote transfers can be limited by submitting
1909 a mask containing bits specifying the desired information.
1910 Use a union of these values as the 'selection' parameter to
1911 get_thread_info. FIXME: Make these TAG names more thread specific. */
1912
1913 #define TAG_THREADID 1
1914 #define TAG_EXISTS 2
1915 #define TAG_DISPLAY 4
1916 #define TAG_THREADNAME 8
1917 #define TAG_MOREDISPLAY 16
1918
1919 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1920
1921 static char *unpack_nibble (char *buf, int *val);
1922
1923 static char *unpack_byte (char *buf, int *value);
1924
1925 static char *pack_int (char *buf, int value);
1926
1927 static char *unpack_int (char *buf, int *value);
1928
1929 static char *unpack_string (char *src, char *dest, int length);
1930
1931 static char *pack_threadid (char *pkt, threadref *id);
1932
1933 static char *unpack_threadid (char *inbuf, threadref *id);
1934
1935 void int_to_threadref (threadref *id, int value);
1936
1937 static int threadref_to_int (threadref *ref);
1938
1939 static void copy_threadref (threadref *dest, threadref *src);
1940
1941 static int threadmatch (threadref *dest, threadref *src);
1942
1943 static char *pack_threadinfo_request (char *pkt, int mode,
1944 threadref *id);
1945
1946 static int remote_unpack_thread_info_response (char *pkt,
1947 threadref *expectedref,
1948 struct gdb_ext_thread_info
1949 *info);
1950
1951
1952 static int remote_get_threadinfo (threadref *threadid,
1953 int fieldset, /*TAG mask */
1954 struct gdb_ext_thread_info *info);
1955
1956 static char *pack_threadlist_request (char *pkt, int startflag,
1957 int threadcount,
1958 threadref *nextthread);
1959
1960 static int parse_threadlist_response (char *pkt,
1961 int result_limit,
1962 threadref *original_echo,
1963 threadref *resultlist,
1964 int *doneflag);
1965
1966 static int remote_get_threadlist (int startflag,
1967 threadref *nextthread,
1968 int result_limit,
1969 int *done,
1970 int *result_count,
1971 threadref *threadlist);
1972
1973 typedef int (*rmt_thread_action) (threadref *ref, void *context);
1974
1975 static int remote_threadlist_iterator (rmt_thread_action stepfunction,
1976 void *context, int looplimit);
1977
1978 static int remote_newthread_step (threadref *ref, void *context);
1979
1980
1981 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
1982 buffer we're allowed to write to. Returns
1983 BUF+CHARACTERS_WRITTEN. */
1984
1985 static char *
1986 write_ptid (char *buf, const char *endbuf, ptid_t ptid)
1987 {
1988 int pid, tid;
1989 struct remote_state *rs = get_remote_state ();
1990
1991 if (remote_multi_process_p (rs))
1992 {
1993 pid = ptid_get_pid (ptid);
1994 if (pid < 0)
1995 buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid);
1996 else
1997 buf += xsnprintf (buf, endbuf - buf, "p%x.", pid);
1998 }
1999 tid = ptid_get_lwp (ptid);
2000 if (tid < 0)
2001 buf += xsnprintf (buf, endbuf - buf, "-%x", -tid);
2002 else
2003 buf += xsnprintf (buf, endbuf - buf, "%x", tid);
2004
2005 return buf;
2006 }
2007
2008 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
2009 passed the last parsed char. Returns null_ptid on error. */
2010
2011 static ptid_t
2012 read_ptid (char *buf, char **obuf)
2013 {
2014 char *p = buf;
2015 char *pp;
2016 ULONGEST pid = 0, tid = 0;
2017
2018 if (*p == 'p')
2019 {
2020 /* Multi-process ptid. */
2021 pp = unpack_varlen_hex (p + 1, &pid);
2022 if (*pp != '.')
2023 error (_("invalid remote ptid: %s"), p);
2024
2025 p = pp;
2026 pp = unpack_varlen_hex (p + 1, &tid);
2027 if (obuf)
2028 *obuf = pp;
2029 return ptid_build (pid, tid, 0);
2030 }
2031
2032 /* No multi-process. Just a tid. */
2033 pp = unpack_varlen_hex (p, &tid);
2034
2035 /* Since the stub is not sending a process id, then default to
2036 what's in inferior_ptid, unless it's null at this point. If so,
2037 then since there's no way to know the pid of the reported
2038 threads, use the magic number. */
2039 if (ptid_equal (inferior_ptid, null_ptid))
2040 pid = ptid_get_pid (magic_null_ptid);
2041 else
2042 pid = ptid_get_pid (inferior_ptid);
2043
2044 if (obuf)
2045 *obuf = pp;
2046 return ptid_build (pid, tid, 0);
2047 }
2048
2049 static int
2050 stubhex (int ch)
2051 {
2052 if (ch >= 'a' && ch <= 'f')
2053 return ch - 'a' + 10;
2054 if (ch >= '0' && ch <= '9')
2055 return ch - '0';
2056 if (ch >= 'A' && ch <= 'F')
2057 return ch - 'A' + 10;
2058 return -1;
2059 }
2060
2061 static int
2062 stub_unpack_int (char *buff, int fieldlength)
2063 {
2064 int nibble;
2065 int retval = 0;
2066
2067 while (fieldlength)
2068 {
2069 nibble = stubhex (*buff++);
2070 retval |= nibble;
2071 fieldlength--;
2072 if (fieldlength)
2073 retval = retval << 4;
2074 }
2075 return retval;
2076 }
2077
2078 static char *
2079 unpack_nibble (char *buf, int *val)
2080 {
2081 *val = fromhex (*buf++);
2082 return buf;
2083 }
2084
2085 static char *
2086 unpack_byte (char *buf, int *value)
2087 {
2088 *value = stub_unpack_int (buf, 2);
2089 return buf + 2;
2090 }
2091
2092 static char *
2093 pack_int (char *buf, int value)
2094 {
2095 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
2096 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
2097 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
2098 buf = pack_hex_byte (buf, (value & 0xff));
2099 return buf;
2100 }
2101
2102 static char *
2103 unpack_int (char *buf, int *value)
2104 {
2105 *value = stub_unpack_int (buf, 8);
2106 return buf + 8;
2107 }
2108
2109 #if 0 /* Currently unused, uncomment when needed. */
2110 static char *pack_string (char *pkt, char *string);
2111
2112 static char *
2113 pack_string (char *pkt, char *string)
2114 {
2115 char ch;
2116 int len;
2117
2118 len = strlen (string);
2119 if (len > 200)
2120 len = 200; /* Bigger than most GDB packets, junk??? */
2121 pkt = pack_hex_byte (pkt, len);
2122 while (len-- > 0)
2123 {
2124 ch = *string++;
2125 if ((ch == '\0') || (ch == '#'))
2126 ch = '*'; /* Protect encapsulation. */
2127 *pkt++ = ch;
2128 }
2129 return pkt;
2130 }
2131 #endif /* 0 (unused) */
2132
2133 static char *
2134 unpack_string (char *src, char *dest, int length)
2135 {
2136 while (length--)
2137 *dest++ = *src++;
2138 *dest = '\0';
2139 return src;
2140 }
2141
2142 static char *
2143 pack_threadid (char *pkt, threadref *id)
2144 {
2145 char *limit;
2146 unsigned char *altid;
2147
2148 altid = (unsigned char *) id;
2149 limit = pkt + BUF_THREAD_ID_SIZE;
2150 while (pkt < limit)
2151 pkt = pack_hex_byte (pkt, *altid++);
2152 return pkt;
2153 }
2154
2155
2156 static char *
2157 unpack_threadid (char *inbuf, threadref *id)
2158 {
2159 char *altref;
2160 char *limit = inbuf + BUF_THREAD_ID_SIZE;
2161 int x, y;
2162
2163 altref = (char *) id;
2164
2165 while (inbuf < limit)
2166 {
2167 x = stubhex (*inbuf++);
2168 y = stubhex (*inbuf++);
2169 *altref++ = (x << 4) | y;
2170 }
2171 return inbuf;
2172 }
2173
2174 /* Externally, threadrefs are 64 bits but internally, they are still
2175 ints. This is due to a mismatch of specifications. We would like
2176 to use 64bit thread references internally. This is an adapter
2177 function. */
2178
2179 void
2180 int_to_threadref (threadref *id, int value)
2181 {
2182 unsigned char *scan;
2183
2184 scan = (unsigned char *) id;
2185 {
2186 int i = 4;
2187 while (i--)
2188 *scan++ = 0;
2189 }
2190 *scan++ = (value >> 24) & 0xff;
2191 *scan++ = (value >> 16) & 0xff;
2192 *scan++ = (value >> 8) & 0xff;
2193 *scan++ = (value & 0xff);
2194 }
2195
2196 static int
2197 threadref_to_int (threadref *ref)
2198 {
2199 int i, value = 0;
2200 unsigned char *scan;
2201
2202 scan = *ref;
2203 scan += 4;
2204 i = 4;
2205 while (i-- > 0)
2206 value = (value << 8) | ((*scan++) & 0xff);
2207 return value;
2208 }
2209
2210 static void
2211 copy_threadref (threadref *dest, threadref *src)
2212 {
2213 int i;
2214 unsigned char *csrc, *cdest;
2215
2216 csrc = (unsigned char *) src;
2217 cdest = (unsigned char *) dest;
2218 i = 8;
2219 while (i--)
2220 *cdest++ = *csrc++;
2221 }
2222
2223 static int
2224 threadmatch (threadref *dest, threadref *src)
2225 {
2226 /* Things are broken right now, so just assume we got a match. */
2227 #if 0
2228 unsigned char *srcp, *destp;
2229 int i, result;
2230 srcp = (char *) src;
2231 destp = (char *) dest;
2232
2233 result = 1;
2234 while (i-- > 0)
2235 result &= (*srcp++ == *destp++) ? 1 : 0;
2236 return result;
2237 #endif
2238 return 1;
2239 }
2240
2241 /*
2242 threadid:1, # always request threadid
2243 context_exists:2,
2244 display:4,
2245 unique_name:8,
2246 more_display:16
2247 */
2248
2249 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2250
2251 static char *
2252 pack_threadinfo_request (char *pkt, int mode, threadref *id)
2253 {
2254 *pkt++ = 'q'; /* Info Query */
2255 *pkt++ = 'P'; /* process or thread info */
2256 pkt = pack_int (pkt, mode); /* mode */
2257 pkt = pack_threadid (pkt, id); /* threadid */
2258 *pkt = '\0'; /* terminate */
2259 return pkt;
2260 }
2261
2262 /* These values tag the fields in a thread info response packet. */
2263 /* Tagging the fields allows us to request specific fields and to
2264 add more fields as time goes by. */
2265
2266 #define TAG_THREADID 1 /* Echo the thread identifier. */
2267 #define TAG_EXISTS 2 /* Is this process defined enough to
2268 fetch registers and its stack? */
2269 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2270 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2271 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2272 the process. */
2273
2274 static int
2275 remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
2276 struct gdb_ext_thread_info *info)
2277 {
2278 struct remote_state *rs = get_remote_state ();
2279 int mask, length;
2280 int tag;
2281 threadref ref;
2282 char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */
2283 int retval = 1;
2284
2285 /* info->threadid = 0; FIXME: implement zero_threadref. */
2286 info->active = 0;
2287 info->display[0] = '\0';
2288 info->shortname[0] = '\0';
2289 info->more_display[0] = '\0';
2290
2291 /* Assume the characters indicating the packet type have been
2292 stripped. */
2293 pkt = unpack_int (pkt, &mask); /* arg mask */
2294 pkt = unpack_threadid (pkt, &ref);
2295
2296 if (mask == 0)
2297 warning (_("Incomplete response to threadinfo request."));
2298 if (!threadmatch (&ref, expectedref))
2299 { /* This is an answer to a different request. */
2300 warning (_("ERROR RMT Thread info mismatch."));
2301 return 0;
2302 }
2303 copy_threadref (&info->threadid, &ref);
2304
2305 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2306
2307 /* Packets are terminated with nulls. */
2308 while ((pkt < limit) && mask && *pkt)
2309 {
2310 pkt = unpack_int (pkt, &tag); /* tag */
2311 pkt = unpack_byte (pkt, &length); /* length */
2312 if (!(tag & mask)) /* Tags out of synch with mask. */
2313 {
2314 warning (_("ERROR RMT: threadinfo tag mismatch."));
2315 retval = 0;
2316 break;
2317 }
2318 if (tag == TAG_THREADID)
2319 {
2320 if (length != 16)
2321 {
2322 warning (_("ERROR RMT: length of threadid is not 16."));
2323 retval = 0;
2324 break;
2325 }
2326 pkt = unpack_threadid (pkt, &ref);
2327 mask = mask & ~TAG_THREADID;
2328 continue;
2329 }
2330 if (tag == TAG_EXISTS)
2331 {
2332 info->active = stub_unpack_int (pkt, length);
2333 pkt += length;
2334 mask = mask & ~(TAG_EXISTS);
2335 if (length > 8)
2336 {
2337 warning (_("ERROR RMT: 'exists' length too long."));
2338 retval = 0;
2339 break;
2340 }
2341 continue;
2342 }
2343 if (tag == TAG_THREADNAME)
2344 {
2345 pkt = unpack_string (pkt, &info->shortname[0], length);
2346 mask = mask & ~TAG_THREADNAME;
2347 continue;
2348 }
2349 if (tag == TAG_DISPLAY)
2350 {
2351 pkt = unpack_string (pkt, &info->display[0], length);
2352 mask = mask & ~TAG_DISPLAY;
2353 continue;
2354 }
2355 if (tag == TAG_MOREDISPLAY)
2356 {
2357 pkt = unpack_string (pkt, &info->more_display[0], length);
2358 mask = mask & ~TAG_MOREDISPLAY;
2359 continue;
2360 }
2361 warning (_("ERROR RMT: unknown thread info tag."));
2362 break; /* Not a tag we know about. */
2363 }
2364 return retval;
2365 }
2366
2367 static int
2368 remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
2369 struct gdb_ext_thread_info *info)
2370 {
2371 struct remote_state *rs = get_remote_state ();
2372 int result;
2373
2374 pack_threadinfo_request (rs->buf, fieldset, threadid);
2375 putpkt (rs->buf);
2376 getpkt (&rs->buf, &rs->buf_size, 0);
2377
2378 if (rs->buf[0] == '\0')
2379 return 0;
2380
2381 result = remote_unpack_thread_info_response (rs->buf + 2,
2382 threadid, info);
2383 return result;
2384 }
2385
2386 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2387
2388 static char *
2389 pack_threadlist_request (char *pkt, int startflag, int threadcount,
2390 threadref *nextthread)
2391 {
2392 *pkt++ = 'q'; /* info query packet */
2393 *pkt++ = 'L'; /* Process LIST or threadLIST request */
2394 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
2395 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
2396 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
2397 *pkt = '\0';
2398 return pkt;
2399 }
2400
2401 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2402
2403 static int
2404 parse_threadlist_response (char *pkt, int result_limit,
2405 threadref *original_echo, threadref *resultlist,
2406 int *doneflag)
2407 {
2408 struct remote_state *rs = get_remote_state ();
2409 char *limit;
2410 int count, resultcount, done;
2411
2412 resultcount = 0;
2413 /* Assume the 'q' and 'M chars have been stripped. */
2414 limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE);
2415 /* done parse past here */
2416 pkt = unpack_byte (pkt, &count); /* count field */
2417 pkt = unpack_nibble (pkt, &done);
2418 /* The first threadid is the argument threadid. */
2419 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
2420 while ((count-- > 0) && (pkt < limit))
2421 {
2422 pkt = unpack_threadid (pkt, resultlist++);
2423 if (resultcount++ >= result_limit)
2424 break;
2425 }
2426 if (doneflag)
2427 *doneflag = done;
2428 return resultcount;
2429 }
2430
2431 static int
2432 remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
2433 int *done, int *result_count, threadref *threadlist)
2434 {
2435 struct remote_state *rs = get_remote_state ();
2436 int result = 1;
2437
2438 /* Trancate result limit to be smaller than the packet size. */
2439 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10)
2440 >= get_remote_packet_size ())
2441 result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2;
2442
2443 pack_threadlist_request (rs->buf, startflag, result_limit, nextthread);
2444 putpkt (rs->buf);
2445 getpkt (&rs->buf, &rs->buf_size, 0);
2446
2447 if (*rs->buf == '\0')
2448 return 0;
2449 else
2450 *result_count =
2451 parse_threadlist_response (rs->buf + 2, result_limit,
2452 &rs->echo_nextthread, threadlist, done);
2453
2454 if (!threadmatch (&rs->echo_nextthread, nextthread))
2455 {
2456 /* FIXME: This is a good reason to drop the packet. */
2457 /* Possably, there is a duplicate response. */
2458 /* Possabilities :
2459 retransmit immediatly - race conditions
2460 retransmit after timeout - yes
2461 exit
2462 wait for packet, then exit
2463 */
2464 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2465 return 0; /* I choose simply exiting. */
2466 }
2467 if (*result_count <= 0)
2468 {
2469 if (*done != 1)
2470 {
2471 warning (_("RMT ERROR : failed to get remote thread list."));
2472 result = 0;
2473 }
2474 return result; /* break; */
2475 }
2476 if (*result_count > result_limit)
2477 {
2478 *result_count = 0;
2479 warning (_("RMT ERROR: threadlist response longer than requested."));
2480 return 0;
2481 }
2482 return result;
2483 }
2484
2485 /* This is the interface between remote and threads, remotes upper
2486 interface. */
2487
2488 /* remote_find_new_threads retrieves the thread list and for each
2489 thread in the list, looks up the thread in GDB's internal list,
2490 adding the thread if it does not already exist. This involves
2491 getting partial thread lists from the remote target so, polling the
2492 quit_flag is required. */
2493
2494
2495 static int
2496 remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
2497 int looplimit)
2498 {
2499 struct remote_state *rs = get_remote_state ();
2500 int done, i, result_count;
2501 int startflag = 1;
2502 int result = 1;
2503 int loopcount = 0;
2504
2505 done = 0;
2506 while (!done)
2507 {
2508 if (loopcount++ > looplimit)
2509 {
2510 result = 0;
2511 warning (_("Remote fetch threadlist -infinite loop-."));
2512 break;
2513 }
2514 if (!remote_get_threadlist (startflag, &rs->nextthread,
2515 MAXTHREADLISTRESULTS,
2516 &done, &result_count, rs->resultthreadlist))
2517 {
2518 result = 0;
2519 break;
2520 }
2521 /* Clear for later iterations. */
2522 startflag = 0;
2523 /* Setup to resume next batch of thread references, set nextthread. */
2524 if (result_count >= 1)
2525 copy_threadref (&rs->nextthread,
2526 &rs->resultthreadlist[result_count - 1]);
2527 i = 0;
2528 while (result_count--)
2529 if (!(result = (*stepfunction) (&rs->resultthreadlist[i++], context)))
2530 break;
2531 }
2532 return result;
2533 }
2534
2535 static int
2536 remote_newthread_step (threadref *ref, void *context)
2537 {
2538 int pid = ptid_get_pid (inferior_ptid);
2539 ptid_t ptid = ptid_build (pid, threadref_to_int (ref), 0);
2540
2541 if (!in_thread_list (ptid))
2542 add_thread (ptid);
2543 return 1; /* continue iterator */
2544 }
2545
2546 #define CRAZY_MAX_THREADS 1000
2547
2548 static ptid_t
2549 remote_current_thread (ptid_t oldpid)
2550 {
2551 struct remote_state *rs = get_remote_state ();
2552
2553 putpkt ("qC");
2554 getpkt (&rs->buf, &rs->buf_size, 0);
2555 if (rs->buf[0] == 'Q' && rs->buf[1] == 'C')
2556 return read_ptid (&rs->buf[2], NULL);
2557 else
2558 return oldpid;
2559 }
2560
2561 /* Find new threads for info threads command.
2562 * Original version, using John Metzler's thread protocol.
2563 */
2564
2565 static void
2566 remote_find_new_threads (void)
2567 {
2568 remote_threadlist_iterator (remote_newthread_step, 0,
2569 CRAZY_MAX_THREADS);
2570 }
2571
2572 #if defined(HAVE_LIBEXPAT)
2573
2574 typedef struct thread_item
2575 {
2576 ptid_t ptid;
2577 char *extra;
2578 int core;
2579 } thread_item_t;
2580 DEF_VEC_O(thread_item_t);
2581
2582 struct threads_parsing_context
2583 {
2584 VEC (thread_item_t) *items;
2585 };
2586
2587 static void
2588 start_thread (struct gdb_xml_parser *parser,
2589 const struct gdb_xml_element *element,
2590 void *user_data, VEC(gdb_xml_value_s) *attributes)
2591 {
2592 struct threads_parsing_context *data = user_data;
2593
2594 struct thread_item item;
2595 char *id;
2596 struct gdb_xml_value *attr;
2597
2598 id = xml_find_attribute (attributes, "id")->value;
2599 item.ptid = read_ptid (id, NULL);
2600
2601 attr = xml_find_attribute (attributes, "core");
2602 if (attr != NULL)
2603 item.core = *(ULONGEST *) attr->value;
2604 else
2605 item.core = -1;
2606
2607 item.extra = 0;
2608
2609 VEC_safe_push (thread_item_t, data->items, &item);
2610 }
2611
2612 static void
2613 end_thread (struct gdb_xml_parser *parser,
2614 const struct gdb_xml_element *element,
2615 void *user_data, const char *body_text)
2616 {
2617 struct threads_parsing_context *data = user_data;
2618
2619 if (body_text && *body_text)
2620 VEC_last (thread_item_t, data->items)->extra = xstrdup (body_text);
2621 }
2622
2623 const struct gdb_xml_attribute thread_attributes[] = {
2624 { "id", GDB_XML_AF_NONE, NULL, NULL },
2625 { "core", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL },
2626 { NULL, GDB_XML_AF_NONE, NULL, NULL }
2627 };
2628
2629 const struct gdb_xml_element thread_children[] = {
2630 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
2631 };
2632
2633 const struct gdb_xml_element threads_children[] = {
2634 { "thread", thread_attributes, thread_children,
2635 GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
2636 start_thread, end_thread },
2637 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
2638 };
2639
2640 const struct gdb_xml_element threads_elements[] = {
2641 { "threads", NULL, threads_children,
2642 GDB_XML_EF_NONE, NULL, NULL },
2643 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
2644 };
2645
2646 /* Discard the contents of the constructed thread info context. */
2647
2648 static void
2649 clear_threads_parsing_context (void *p)
2650 {
2651 struct threads_parsing_context *context = p;
2652 int i;
2653 struct thread_item *item;
2654
2655 for (i = 0; VEC_iterate (thread_item_t, context->items, i, item); ++i)
2656 xfree (item->extra);
2657
2658 VEC_free (thread_item_t, context->items);
2659 }
2660
2661 #endif
2662
2663 /*
2664 * Find all threads for info threads command.
2665 * Uses new thread protocol contributed by Cisco.
2666 * Falls back and attempts to use the older method (above)
2667 * if the target doesn't respond to the new method.
2668 */
2669
2670 static void
2671 remote_threads_info (struct target_ops *ops)
2672 {
2673 struct remote_state *rs = get_remote_state ();
2674 char *bufp;
2675 ptid_t new_thread;
2676
2677 if (rs->remote_desc == 0) /* paranoia */
2678 error (_("Command can only be used when connected to the remote target."));
2679
2680 #if defined(HAVE_LIBEXPAT)
2681 if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE)
2682 {
2683 char *xml = target_read_stralloc (&current_target,
2684 TARGET_OBJECT_THREADS, NULL);
2685
2686 struct cleanup *back_to = make_cleanup (xfree, xml);
2687
2688 if (xml && *xml)
2689 {
2690 struct threads_parsing_context context;
2691
2692 context.items = NULL;
2693 make_cleanup (clear_threads_parsing_context, &context);
2694
2695 if (gdb_xml_parse_quick (_("threads"), "threads.dtd",
2696 threads_elements, xml, &context) == 0)
2697 {
2698 int i;
2699 struct thread_item *item;
2700
2701 for (i = 0;
2702 VEC_iterate (thread_item_t, context.items, i, item);
2703 ++i)
2704 {
2705 if (!ptid_equal (item->ptid, null_ptid))
2706 {
2707 struct private_thread_info *info;
2708 /* In non-stop mode, we assume new found threads
2709 are running until proven otherwise with a
2710 stop reply. In all-stop, we can only get
2711 here if all threads are stopped. */
2712 int running = non_stop ? 1 : 0;
2713
2714 remote_notice_new_inferior (item->ptid, running);
2715
2716 info = demand_private_info (item->ptid);
2717 info->core = item->core;
2718 info->extra = item->extra;
2719 item->extra = NULL;
2720 }
2721 }
2722 }
2723 }
2724
2725 do_cleanups (back_to);
2726 return;
2727 }
2728 #endif
2729
2730 if (rs->use_threadinfo_query)
2731 {
2732 putpkt ("qfThreadInfo");
2733 getpkt (&rs->buf, &rs->buf_size, 0);
2734 bufp = rs->buf;
2735 if (bufp[0] != '\0') /* q packet recognized */
2736 {
2737 struct cleanup *old_chain;
2738 char *saved_reply;
2739
2740 /* remote_notice_new_inferior (in the loop below) may make
2741 new RSP calls, which clobber rs->buf. Work with a
2742 copy. */
2743 bufp = saved_reply = xstrdup (rs->buf);
2744 old_chain = make_cleanup (free_current_contents, &saved_reply);
2745
2746 while (*bufp++ == 'm') /* reply contains one or more TID */
2747 {
2748 do
2749 {
2750 new_thread = read_ptid (bufp, &bufp);
2751 if (!ptid_equal (new_thread, null_ptid))
2752 {
2753 /* In non-stop mode, we assume new found threads
2754 are running until proven otherwise with a
2755 stop reply. In all-stop, we can only get
2756 here if all threads are stopped. */
2757 int running = non_stop ? 1 : 0;
2758
2759 remote_notice_new_inferior (new_thread, running);
2760 }
2761 }
2762 while (*bufp++ == ','); /* comma-separated list */
2763 free_current_contents (&saved_reply);
2764 putpkt ("qsThreadInfo");
2765 getpkt (&rs->buf, &rs->buf_size, 0);
2766 bufp = saved_reply = xstrdup (rs->buf);
2767 }
2768 do_cleanups (old_chain);
2769 return; /* done */
2770 }
2771 }
2772
2773 /* Only qfThreadInfo is supported in non-stop mode. */
2774 if (non_stop)
2775 return;
2776
2777 /* Else fall back to old method based on jmetzler protocol. */
2778 rs->use_threadinfo_query = 0;
2779 remote_find_new_threads ();
2780 return;
2781 }
2782
2783 /*
2784 * Collect a descriptive string about the given thread.
2785 * The target may say anything it wants to about the thread
2786 * (typically info about its blocked / runnable state, name, etc.).
2787 * This string will appear in the info threads display.
2788 *
2789 * Optional: targets are not required to implement this function.
2790 */
2791
2792 static char *
2793 remote_threads_extra_info (struct target_ops *self, struct thread_info *tp)
2794 {
2795 struct remote_state *rs = get_remote_state ();
2796 int result;
2797 int set;
2798 threadref id;
2799 struct gdb_ext_thread_info threadinfo;
2800 static char display_buf[100]; /* arbitrary... */
2801 int n = 0; /* position in display_buf */
2802
2803 if (rs->remote_desc == 0) /* paranoia */
2804 internal_error (__FILE__, __LINE__,
2805 _("remote_threads_extra_info"));
2806
2807 if (ptid_equal (tp->ptid, magic_null_ptid)
2808 || (ptid_get_pid (tp->ptid) != 0 && ptid_get_lwp (tp->ptid) == 0))
2809 /* This is the main thread which was added by GDB. The remote
2810 server doesn't know about it. */
2811 return NULL;
2812
2813 if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE)
2814 {
2815 struct thread_info *info = find_thread_ptid (tp->ptid);
2816
2817 if (info && info->private)
2818 return info->private->extra;
2819 else
2820 return NULL;
2821 }
2822
2823 if (rs->use_threadextra_query)
2824 {
2825 char *b = rs->buf;
2826 char *endb = rs->buf + get_remote_packet_size ();
2827
2828 xsnprintf (b, endb - b, "qThreadExtraInfo,");
2829 b += strlen (b);
2830 write_ptid (b, endb, tp->ptid);
2831
2832 putpkt (rs->buf);
2833 getpkt (&rs->buf, &rs->buf_size, 0);
2834 if (rs->buf[0] != 0)
2835 {
2836 n = min (strlen (rs->buf) / 2, sizeof (display_buf));
2837 result = hex2bin (rs->buf, (gdb_byte *) display_buf, n);
2838 display_buf [result] = '\0';
2839 return display_buf;
2840 }
2841 }
2842
2843 /* If the above query fails, fall back to the old method. */
2844 rs->use_threadextra_query = 0;
2845 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
2846 | TAG_MOREDISPLAY | TAG_DISPLAY;
2847 int_to_threadref (&id, ptid_get_lwp (tp->ptid));
2848 if (remote_get_threadinfo (&id, set, &threadinfo))
2849 if (threadinfo.active)
2850 {
2851 if (*threadinfo.shortname)
2852 n += xsnprintf (&display_buf[0], sizeof (display_buf) - n,
2853 " Name: %s,", threadinfo.shortname);
2854 if (*threadinfo.display)
2855 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
2856 " State: %s,", threadinfo.display);
2857 if (*threadinfo.more_display)
2858 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
2859 " Priority: %s", threadinfo.more_display);
2860
2861 if (n > 0)
2862 {
2863 /* For purely cosmetic reasons, clear up trailing commas. */
2864 if (',' == display_buf[n-1])
2865 display_buf[n-1] = ' ';
2866 return display_buf;
2867 }
2868 }
2869 return NULL;
2870 }
2871 \f
2872
2873 static int
2874 remote_static_tracepoint_marker_at (struct target_ops *self, CORE_ADDR addr,
2875 struct static_tracepoint_marker *marker)
2876 {
2877 struct remote_state *rs = get_remote_state ();
2878 char *p = rs->buf;
2879
2880 xsnprintf (p, get_remote_packet_size (), "qTSTMat:");
2881 p += strlen (p);
2882 p += hexnumstr (p, addr);
2883 putpkt (rs->buf);
2884 getpkt (&rs->buf, &rs->buf_size, 0);
2885 p = rs->buf;
2886
2887 if (*p == 'E')
2888 error (_("Remote failure reply: %s"), p);
2889
2890 if (*p++ == 'm')
2891 {
2892 parse_static_tracepoint_marker_definition (p, &p, marker);
2893 return 1;
2894 }
2895
2896 return 0;
2897 }
2898
2899 static VEC(static_tracepoint_marker_p) *
2900 remote_static_tracepoint_markers_by_strid (struct target_ops *self,
2901 const char *strid)
2902 {
2903 struct remote_state *rs = get_remote_state ();
2904 VEC(static_tracepoint_marker_p) *markers = NULL;
2905 struct static_tracepoint_marker *marker = NULL;
2906 struct cleanup *old_chain;
2907 char *p;
2908
2909 /* Ask for a first packet of static tracepoint marker
2910 definition. */
2911 putpkt ("qTfSTM");
2912 getpkt (&rs->buf, &rs->buf_size, 0);
2913 p = rs->buf;
2914 if (*p == 'E')
2915 error (_("Remote failure reply: %s"), p);
2916
2917 old_chain = make_cleanup (free_current_marker, &marker);
2918
2919 while (*p++ == 'm')
2920 {
2921 if (marker == NULL)
2922 marker = XCNEW (struct static_tracepoint_marker);
2923
2924 do
2925 {
2926 parse_static_tracepoint_marker_definition (p, &p, marker);
2927
2928 if (strid == NULL || strcmp (strid, marker->str_id) == 0)
2929 {
2930 VEC_safe_push (static_tracepoint_marker_p,
2931 markers, marker);
2932 marker = NULL;
2933 }
2934 else
2935 {
2936 release_static_tracepoint_marker (marker);
2937 memset (marker, 0, sizeof (*marker));
2938 }
2939 }
2940 while (*p++ == ','); /* comma-separated list */
2941 /* Ask for another packet of static tracepoint definition. */
2942 putpkt ("qTsSTM");
2943 getpkt (&rs->buf, &rs->buf_size, 0);
2944 p = rs->buf;
2945 }
2946
2947 do_cleanups (old_chain);
2948 return markers;
2949 }
2950
2951 \f
2952 /* Implement the to_get_ada_task_ptid function for the remote targets. */
2953
2954 static ptid_t
2955 remote_get_ada_task_ptid (struct target_ops *self, long lwp, long thread)
2956 {
2957 return ptid_build (ptid_get_pid (inferior_ptid), lwp, 0);
2958 }
2959 \f
2960
2961 /* Restart the remote side; this is an extended protocol operation. */
2962
2963 static void
2964 extended_remote_restart (void)
2965 {
2966 struct remote_state *rs = get_remote_state ();
2967
2968 /* Send the restart command; for reasons I don't understand the
2969 remote side really expects a number after the "R". */
2970 xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0);
2971 putpkt (rs->buf);
2972
2973 remote_fileio_reset ();
2974 }
2975 \f
2976 /* Clean up connection to a remote debugger. */
2977
2978 static void
2979 remote_close (struct target_ops *self)
2980 {
2981 struct remote_state *rs = get_remote_state ();
2982
2983 if (rs->remote_desc == NULL)
2984 return; /* already closed */
2985
2986 /* Make sure we leave stdin registered in the event loop, and we
2987 don't leave the async SIGINT signal handler installed. */
2988 remote_terminal_ours (self);
2989
2990 serial_close (rs->remote_desc);
2991 rs->remote_desc = NULL;
2992
2993 /* We don't have a connection to the remote stub anymore. Get rid
2994 of all the inferiors and their threads we were controlling.
2995 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
2996 will be unable to find the thread corresponding to (pid, 0, 0). */
2997 inferior_ptid = null_ptid;
2998 discard_all_inferiors ();
2999
3000 /* We are closing the remote target, so we should discard
3001 everything of this target. */
3002 discard_pending_stop_replies_in_queue (rs);
3003
3004 if (remote_async_inferior_event_token)
3005 delete_async_event_handler (&remote_async_inferior_event_token);
3006
3007 remote_notif_state_xfree (rs->notif_state);
3008
3009 trace_reset_local_state ();
3010 }
3011
3012 /* Query the remote side for the text, data and bss offsets. */
3013
3014 static void
3015 get_offsets (void)
3016 {
3017 struct remote_state *rs = get_remote_state ();
3018 char *buf;
3019 char *ptr;
3020 int lose, num_segments = 0, do_sections, do_segments;
3021 CORE_ADDR text_addr, data_addr, bss_addr, segments[2];
3022 struct section_offsets *offs;
3023 struct symfile_segment_data *data;
3024
3025 if (symfile_objfile == NULL)
3026 return;
3027
3028 putpkt ("qOffsets");
3029 getpkt (&rs->buf, &rs->buf_size, 0);
3030 buf = rs->buf;
3031
3032 if (buf[0] == '\000')
3033 return; /* Return silently. Stub doesn't support
3034 this command. */
3035 if (buf[0] == 'E')
3036 {
3037 warning (_("Remote failure reply: %s"), buf);
3038 return;
3039 }
3040
3041 /* Pick up each field in turn. This used to be done with scanf, but
3042 scanf will make trouble if CORE_ADDR size doesn't match
3043 conversion directives correctly. The following code will work
3044 with any size of CORE_ADDR. */
3045 text_addr = data_addr = bss_addr = 0;
3046 ptr = buf;
3047 lose = 0;
3048
3049 if (strncmp (ptr, "Text=", 5) == 0)
3050 {
3051 ptr += 5;
3052 /* Don't use strtol, could lose on big values. */
3053 while (*ptr && *ptr != ';')
3054 text_addr = (text_addr << 4) + fromhex (*ptr++);
3055
3056 if (strncmp (ptr, ";Data=", 6) == 0)
3057 {
3058 ptr += 6;
3059 while (*ptr && *ptr != ';')
3060 data_addr = (data_addr << 4) + fromhex (*ptr++);
3061 }
3062 else
3063 lose = 1;
3064
3065 if (!lose && strncmp (ptr, ";Bss=", 5) == 0)
3066 {
3067 ptr += 5;
3068 while (*ptr && *ptr != ';')
3069 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
3070
3071 if (bss_addr != data_addr)
3072 warning (_("Target reported unsupported offsets: %s"), buf);
3073 }
3074 else
3075 lose = 1;
3076 }
3077 else if (strncmp (ptr, "TextSeg=", 8) == 0)
3078 {
3079 ptr += 8;
3080 /* Don't use strtol, could lose on big values. */
3081 while (*ptr && *ptr != ';')
3082 text_addr = (text_addr << 4) + fromhex (*ptr++);
3083 num_segments = 1;
3084
3085 if (strncmp (ptr, ";DataSeg=", 9) == 0)
3086 {
3087 ptr += 9;
3088 while (*ptr && *ptr != ';')
3089 data_addr = (data_addr << 4) + fromhex (*ptr++);
3090 num_segments++;
3091 }
3092 }
3093 else
3094 lose = 1;
3095
3096 if (lose)
3097 error (_("Malformed response to offset query, %s"), buf);
3098 else if (*ptr != '\0')
3099 warning (_("Target reported unsupported offsets: %s"), buf);
3100
3101 offs = ((struct section_offsets *)
3102 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
3103 memcpy (offs, symfile_objfile->section_offsets,
3104 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
3105
3106 data = get_symfile_segment_data (symfile_objfile->obfd);
3107 do_segments = (data != NULL);
3108 do_sections = num_segments == 0;
3109
3110 if (num_segments > 0)
3111 {
3112 segments[0] = text_addr;
3113 segments[1] = data_addr;
3114 }
3115 /* If we have two segments, we can still try to relocate everything
3116 by assuming that the .text and .data offsets apply to the whole
3117 text and data segments. Convert the offsets given in the packet
3118 to base addresses for symfile_map_offsets_to_segments. */
3119 else if (data && data->num_segments == 2)
3120 {
3121 segments[0] = data->segment_bases[0] + text_addr;
3122 segments[1] = data->segment_bases[1] + data_addr;
3123 num_segments = 2;
3124 }
3125 /* If the object file has only one segment, assume that it is text
3126 rather than data; main programs with no writable data are rare,
3127 but programs with no code are useless. Of course the code might
3128 have ended up in the data segment... to detect that we would need
3129 the permissions here. */
3130 else if (data && data->num_segments == 1)
3131 {
3132 segments[0] = data->segment_bases[0] + text_addr;
3133 num_segments = 1;
3134 }
3135 /* There's no way to relocate by segment. */
3136 else
3137 do_segments = 0;
3138
3139 if (do_segments)
3140 {
3141 int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data,
3142 offs, num_segments, segments);
3143
3144 if (ret == 0 && !do_sections)
3145 error (_("Can not handle qOffsets TextSeg "
3146 "response with this symbol file"));
3147
3148 if (ret > 0)
3149 do_sections = 0;
3150 }
3151
3152 if (data)
3153 free_symfile_segment_data (data);
3154
3155 if (do_sections)
3156 {
3157 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
3158
3159 /* This is a temporary kludge to force data and bss to use the
3160 same offsets because that's what nlmconv does now. The real
3161 solution requires changes to the stub and remote.c that I
3162 don't have time to do right now. */
3163
3164 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
3165 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
3166 }
3167
3168 objfile_relocate (symfile_objfile, offs);
3169 }
3170
3171 /* Callback for iterate_over_threads. Set the STOP_REQUESTED flags in
3172 threads we know are stopped already. This is used during the
3173 initial remote connection in non-stop mode --- threads that are
3174 reported as already being stopped are left stopped. */
3175
3176 static int
3177 set_stop_requested_callback (struct thread_info *thread, void *data)
3178 {
3179 /* If we have a stop reply for this thread, it must be stopped. */
3180 if (peek_stop_reply (thread->ptid))
3181 set_stop_requested (thread->ptid, 1);
3182
3183 return 0;
3184 }
3185
3186 /* Send interrupt_sequence to remote target. */
3187 static void
3188 send_interrupt_sequence (void)
3189 {
3190 struct remote_state *rs = get_remote_state ();
3191
3192 if (interrupt_sequence_mode == interrupt_sequence_control_c)
3193 remote_serial_write ("\x03", 1);
3194 else if (interrupt_sequence_mode == interrupt_sequence_break)
3195 serial_send_break (rs->remote_desc);
3196 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
3197 {
3198 serial_send_break (rs->remote_desc);
3199 remote_serial_write ("g", 1);
3200 }
3201 else
3202 internal_error (__FILE__, __LINE__,
3203 _("Invalid value for interrupt_sequence_mode: %s."),
3204 interrupt_sequence_mode);
3205 }
3206
3207
3208 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
3209 and extract the PTID. Returns NULL_PTID if not found. */
3210
3211 static ptid_t
3212 stop_reply_extract_thread (char *stop_reply)
3213 {
3214 if (stop_reply[0] == 'T' && strlen (stop_reply) > 3)
3215 {
3216 char *p;
3217
3218 /* Txx r:val ; r:val (...) */
3219 p = &stop_reply[3];
3220
3221 /* Look for "register" named "thread". */
3222 while (*p != '\0')
3223 {
3224 char *p1;
3225
3226 p1 = strchr (p, ':');
3227 if (p1 == NULL)
3228 return null_ptid;
3229
3230 if (strncmp (p, "thread", p1 - p) == 0)
3231 return read_ptid (++p1, &p);
3232
3233 p1 = strchr (p, ';');
3234 if (p1 == NULL)
3235 return null_ptid;
3236 p1++;
3237
3238 p = p1;
3239 }
3240 }
3241
3242 return null_ptid;
3243 }
3244
3245 /* Determine the remote side's current thread. If we have a stop
3246 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
3247 "thread" register we can extract the current thread from. If not,
3248 ask the remote which is the current thread with qC. The former
3249 method avoids a roundtrip. */
3250
3251 static ptid_t
3252 get_current_thread (char *wait_status)
3253 {
3254 ptid_t ptid;
3255
3256 /* Note we don't use remote_parse_stop_reply as that makes use of
3257 the target architecture, which we haven't yet fully determined at
3258 this point. */
3259 if (wait_status != NULL)
3260 ptid = stop_reply_extract_thread (wait_status);
3261 if (ptid_equal (ptid, null_ptid))
3262 ptid = remote_current_thread (inferior_ptid);
3263
3264 return ptid;
3265 }
3266
3267 /* Query the remote target for which is the current thread/process,
3268 add it to our tables, and update INFERIOR_PTID. The caller is
3269 responsible for setting the state such that the remote end is ready
3270 to return the current thread.
3271
3272 This function is called after handling the '?' or 'vRun' packets,
3273 whose response is a stop reply from which we can also try
3274 extracting the thread. If the target doesn't support the explicit
3275 qC query, we infer the current thread from that stop reply, passed
3276 in in WAIT_STATUS, which may be NULL. */
3277
3278 static void
3279 add_current_inferior_and_thread (char *wait_status)
3280 {
3281 struct remote_state *rs = get_remote_state ();
3282 int fake_pid_p = 0;
3283 ptid_t ptid = null_ptid;
3284
3285 inferior_ptid = null_ptid;
3286
3287 /* Now, if we have thread information, update inferior_ptid. */
3288 ptid = get_current_thread (wait_status);
3289
3290 if (!ptid_equal (ptid, null_ptid))
3291 {
3292 if (!remote_multi_process_p (rs))
3293 fake_pid_p = 1;
3294
3295 inferior_ptid = ptid;
3296 }
3297 else
3298 {
3299 /* Without this, some commands which require an active target
3300 (such as kill) won't work. This variable serves (at least)
3301 double duty as both the pid of the target process (if it has
3302 such), and as a flag indicating that a target is active. */
3303 inferior_ptid = magic_null_ptid;
3304 fake_pid_p = 1;
3305 }
3306
3307 remote_add_inferior (fake_pid_p, ptid_get_pid (inferior_ptid), -1);
3308
3309 /* Add the main thread. */
3310 add_thread_silent (inferior_ptid);
3311 }
3312
3313 static void
3314 remote_start_remote (int from_tty, struct target_ops *target, int extended_p)
3315 {
3316 struct remote_state *rs = get_remote_state ();
3317 struct packet_config *noack_config;
3318 char *wait_status = NULL;
3319
3320 immediate_quit++; /* Allow user to interrupt it. */
3321 QUIT;
3322
3323 if (interrupt_on_connect)
3324 send_interrupt_sequence ();
3325
3326 /* Ack any packet which the remote side has already sent. */
3327 serial_write (rs->remote_desc, "+", 1);
3328
3329 /* Signal other parts that we're going through the initial setup,
3330 and so things may not be stable yet. */
3331 rs->starting_up = 1;
3332
3333 /* The first packet we send to the target is the optional "supported
3334 packets" request. If the target can answer this, it will tell us
3335 which later probes to skip. */
3336 remote_query_supported ();
3337
3338 /* If the stub wants to get a QAllow, compose one and send it. */
3339 if (packet_support (PACKET_QAllow) != PACKET_DISABLE)
3340 remote_set_permissions (target);
3341
3342 /* Next, we possibly activate noack mode.
3343
3344 If the QStartNoAckMode packet configuration is set to AUTO,
3345 enable noack mode if the stub reported a wish for it with
3346 qSupported.
3347
3348 If set to TRUE, then enable noack mode even if the stub didn't
3349 report it in qSupported. If the stub doesn't reply OK, the
3350 session ends with an error.
3351
3352 If FALSE, then don't activate noack mode, regardless of what the
3353 stub claimed should be the default with qSupported. */
3354
3355 noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode];
3356 if (packet_config_support (noack_config) != PACKET_DISABLE)
3357 {
3358 putpkt ("QStartNoAckMode");
3359 getpkt (&rs->buf, &rs->buf_size, 0);
3360 if (packet_ok (rs->buf, noack_config) == PACKET_OK)
3361 rs->noack_mode = 1;
3362 }
3363
3364 if (extended_p)
3365 {
3366 /* Tell the remote that we are using the extended protocol. */
3367 putpkt ("!");
3368 getpkt (&rs->buf, &rs->buf_size, 0);
3369 }
3370
3371 /* Let the target know which signals it is allowed to pass down to
3372 the program. */
3373 update_signals_program_target ();
3374
3375 /* Next, if the target can specify a description, read it. We do
3376 this before anything involving memory or registers. */
3377 target_find_description ();
3378
3379 /* Next, now that we know something about the target, update the
3380 address spaces in the program spaces. */
3381 update_address_spaces ();
3382
3383 /* On OSs where the list of libraries is global to all
3384 processes, we fetch them early. */
3385 if (gdbarch_has_global_solist (target_gdbarch ()))
3386 solib_add (NULL, from_tty, target, auto_solib_add);
3387
3388 if (non_stop)
3389 {
3390 if (packet_support (PACKET_QNonStop) != PACKET_ENABLE)
3391 error (_("Non-stop mode requested, but remote "
3392 "does not support non-stop"));
3393
3394 putpkt ("QNonStop:1");
3395 getpkt (&rs->buf, &rs->buf_size, 0);
3396
3397 if (strcmp (rs->buf, "OK") != 0)
3398 error (_("Remote refused setting non-stop mode with: %s"), rs->buf);
3399
3400 /* Find about threads and processes the stub is already
3401 controlling. We default to adding them in the running state.
3402 The '?' query below will then tell us about which threads are
3403 stopped. */
3404 remote_threads_info (target);
3405 }
3406 else if (packet_support (PACKET_QNonStop) == PACKET_ENABLE)
3407 {
3408 /* Don't assume that the stub can operate in all-stop mode.
3409 Request it explicitly. */
3410 putpkt ("QNonStop:0");
3411 getpkt (&rs->buf, &rs->buf_size, 0);
3412
3413 if (strcmp (rs->buf, "OK") != 0)
3414 error (_("Remote refused setting all-stop mode with: %s"), rs->buf);
3415 }
3416
3417 /* Upload TSVs regardless of whether the target is running or not. The
3418 remote stub, such as GDBserver, may have some predefined or builtin
3419 TSVs, even if the target is not running. */
3420 if (remote_get_trace_status (target, current_trace_status ()) != -1)
3421 {
3422 struct uploaded_tsv *uploaded_tsvs = NULL;
3423
3424 remote_upload_trace_state_variables (target, &uploaded_tsvs);
3425 merge_uploaded_trace_state_variables (&uploaded_tsvs);
3426 }
3427
3428 /* Check whether the target is running now. */
3429 putpkt ("?");
3430 getpkt (&rs->buf, &rs->buf_size, 0);
3431
3432 if (!non_stop)
3433 {
3434 ptid_t ptid;
3435 int fake_pid_p = 0;
3436 struct inferior *inf;
3437
3438 if (rs->buf[0] == 'W' || rs->buf[0] == 'X')
3439 {
3440 if (!extended_p)
3441 error (_("The target is not running (try extended-remote?)"));
3442
3443 /* We're connected, but not running. Drop out before we
3444 call start_remote. */
3445 rs->starting_up = 0;
3446 return;
3447 }
3448 else
3449 {
3450 /* Save the reply for later. */
3451 wait_status = alloca (strlen (rs->buf) + 1);
3452 strcpy (wait_status, rs->buf);
3453 }
3454
3455 /* Fetch thread list. */
3456 target_find_new_threads ();
3457
3458 /* Let the stub know that we want it to return the thread. */
3459 set_continue_thread (minus_one_ptid);
3460
3461 if (thread_count () == 0)
3462 {
3463 /* Target has no concept of threads at all. GDB treats
3464 non-threaded target as single-threaded; add a main
3465 thread. */
3466 add_current_inferior_and_thread (wait_status);
3467 }
3468 else
3469 {
3470 /* We have thread information; select the thread the target
3471 says should be current. If we're reconnecting to a
3472 multi-threaded program, this will ideally be the thread
3473 that last reported an event before GDB disconnected. */
3474 inferior_ptid = get_current_thread (wait_status);
3475 if (ptid_equal (inferior_ptid, null_ptid))
3476 {
3477 /* Odd... The target was able to list threads, but not
3478 tell us which thread was current (no "thread"
3479 register in T stop reply?). Just pick the first
3480 thread in the thread list then. */
3481 inferior_ptid = thread_list->ptid;
3482 }
3483 }
3484
3485 /* init_wait_for_inferior should be called before get_offsets in order
3486 to manage `inserted' flag in bp loc in a correct state.
3487 breakpoint_init_inferior, called from init_wait_for_inferior, set
3488 `inserted' flag to 0, while before breakpoint_re_set, called from
3489 start_remote, set `inserted' flag to 1. In the initialization of
3490 inferior, breakpoint_init_inferior should be called first, and then
3491 breakpoint_re_set can be called. If this order is broken, state of
3492 `inserted' flag is wrong, and cause some problems on breakpoint
3493 manipulation. */
3494 init_wait_for_inferior ();
3495
3496 get_offsets (); /* Get text, data & bss offsets. */
3497
3498 /* If we could not find a description using qXfer, and we know
3499 how to do it some other way, try again. This is not
3500 supported for non-stop; it could be, but it is tricky if
3501 there are no stopped threads when we connect. */
3502 if (remote_read_description_p (target)
3503 && gdbarch_target_desc (target_gdbarch ()) == NULL)
3504 {
3505 target_clear_description ();
3506 target_find_description ();
3507 }
3508
3509 /* Use the previously fetched status. */
3510 gdb_assert (wait_status != NULL);
3511 strcpy (rs->buf, wait_status);
3512 rs->cached_wait_status = 1;
3513
3514 immediate_quit--;
3515 start_remote (from_tty); /* Initialize gdb process mechanisms. */
3516 }
3517 else
3518 {
3519 /* Clear WFI global state. Do this before finding about new
3520 threads and inferiors, and setting the current inferior.
3521 Otherwise we would clear the proceed status of the current
3522 inferior when we want its stop_soon state to be preserved
3523 (see notice_new_inferior). */
3524 init_wait_for_inferior ();
3525
3526 /* In non-stop, we will either get an "OK", meaning that there
3527 are no stopped threads at this time; or, a regular stop
3528 reply. In the latter case, there may be more than one thread
3529 stopped --- we pull them all out using the vStopped
3530 mechanism. */
3531 if (strcmp (rs->buf, "OK") != 0)
3532 {
3533 struct notif_client *notif = &notif_client_stop;
3534
3535 /* remote_notif_get_pending_replies acks this one, and gets
3536 the rest out. */
3537 rs->notif_state->pending_event[notif_client_stop.id]
3538 = remote_notif_parse (notif, rs->buf);
3539 remote_notif_get_pending_events (notif);
3540
3541 /* Make sure that threads that were stopped remain
3542 stopped. */
3543 iterate_over_threads (set_stop_requested_callback, NULL);
3544 }
3545
3546 if (target_can_async_p ())
3547 target_async (inferior_event_handler, 0);
3548
3549 if (thread_count () == 0)
3550 {
3551 if (!extended_p)
3552 error (_("The target is not running (try extended-remote?)"));
3553
3554 /* We're connected, but not running. Drop out before we
3555 call start_remote. */
3556 rs->starting_up = 0;
3557 return;
3558 }
3559
3560 /* Let the stub know that we want it to return the thread. */
3561
3562 /* Force the stub to choose a thread. */
3563 set_general_thread (null_ptid);
3564
3565 /* Query it. */
3566 inferior_ptid = remote_current_thread (minus_one_ptid);
3567 if (ptid_equal (inferior_ptid, minus_one_ptid))
3568 error (_("remote didn't report the current thread in non-stop mode"));
3569
3570 get_offsets (); /* Get text, data & bss offsets. */
3571
3572 /* In non-stop mode, any cached wait status will be stored in
3573 the stop reply queue. */
3574 gdb_assert (wait_status == NULL);
3575
3576 /* Report all signals during attach/startup. */
3577 remote_pass_signals (target, 0, NULL);
3578 }
3579
3580 /* If we connected to a live target, do some additional setup. */
3581 if (target_has_execution)
3582 {
3583 if (symfile_objfile) /* No use without a symbol-file. */
3584 remote_check_symbols ();
3585 }
3586
3587 /* Possibly the target has been engaged in a trace run started
3588 previously; find out where things are at. */
3589 if (remote_get_trace_status (target, current_trace_status ()) != -1)
3590 {
3591 struct uploaded_tp *uploaded_tps = NULL;
3592
3593 if (current_trace_status ()->running)
3594 printf_filtered (_("Trace is already running on the target.\n"));
3595
3596 remote_upload_tracepoints (target, &uploaded_tps);
3597
3598 merge_uploaded_tracepoints (&uploaded_tps);
3599 }
3600
3601 /* The thread and inferior lists are now synchronized with the
3602 target, our symbols have been relocated, and we're merged the
3603 target's tracepoints with ours. We're done with basic start
3604 up. */
3605 rs->starting_up = 0;
3606
3607 /* Maybe breakpoints are global and need to be inserted now. */
3608 if (breakpoints_should_be_inserted_now ())
3609 insert_breakpoints ();
3610 }
3611
3612 /* Open a connection to a remote debugger.
3613 NAME is the filename used for communication. */
3614
3615 static void
3616 remote_open (const char *name, int from_tty)
3617 {
3618 remote_open_1 (name, from_tty, &remote_ops, 0);
3619 }
3620
3621 /* Open a connection to a remote debugger using the extended
3622 remote gdb protocol. NAME is the filename used for communication. */
3623
3624 static void
3625 extended_remote_open (const char *name, int from_tty)
3626 {
3627 remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */);
3628 }
3629
3630 /* Reset all packets back to "unknown support". Called when opening a
3631 new connection to a remote target. */
3632
3633 static void
3634 reset_all_packet_configs_support (void)
3635 {
3636 int i;
3637
3638 for (i = 0; i < PACKET_MAX; i++)
3639 remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN;
3640 }
3641
3642 /* Initialize all packet configs. */
3643
3644 static void
3645 init_all_packet_configs (void)
3646 {
3647 int i;
3648
3649 for (i = 0; i < PACKET_MAX; i++)
3650 {
3651 remote_protocol_packets[i].detect = AUTO_BOOLEAN_AUTO;
3652 remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN;
3653 }
3654 }
3655
3656 /* Symbol look-up. */
3657
3658 static void
3659 remote_check_symbols (void)
3660 {
3661 struct remote_state *rs = get_remote_state ();
3662 char *msg, *reply, *tmp;
3663 struct bound_minimal_symbol sym;
3664 int end;
3665
3666 /* The remote side has no concept of inferiors that aren't running
3667 yet, it only knows about running processes. If we're connected
3668 but our current inferior is not running, we should not invite the
3669 remote target to request symbol lookups related to its
3670 (unrelated) current process. */
3671 if (!target_has_execution)
3672 return;
3673
3674 if (packet_support (PACKET_qSymbol) == PACKET_DISABLE)
3675 return;
3676
3677 /* Make sure the remote is pointing at the right process. Note
3678 there's no way to select "no process". */
3679 set_general_process ();
3680
3681 /* Allocate a message buffer. We can't reuse the input buffer in RS,
3682 because we need both at the same time. */
3683 msg = alloca (get_remote_packet_size ());
3684
3685 /* Invite target to request symbol lookups. */
3686
3687 putpkt ("qSymbol::");
3688 getpkt (&rs->buf, &rs->buf_size, 0);
3689 packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSymbol]);
3690 reply = rs->buf;
3691
3692 while (strncmp (reply, "qSymbol:", 8) == 0)
3693 {
3694 struct bound_minimal_symbol sym;
3695
3696 tmp = &reply[8];
3697 end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2);
3698 msg[end] = '\0';
3699 sym = lookup_minimal_symbol (msg, NULL, NULL);
3700 if (sym.minsym == NULL)
3701 xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]);
3702 else
3703 {
3704 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
3705 CORE_ADDR sym_addr = BMSYMBOL_VALUE_ADDRESS (sym);
3706
3707 /* If this is a function address, return the start of code
3708 instead of any data function descriptor. */
3709 sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
3710 sym_addr,
3711 &current_target);
3712
3713 xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s",
3714 phex_nz (sym_addr, addr_size), &reply[8]);
3715 }
3716
3717 putpkt (msg);
3718 getpkt (&rs->buf, &rs->buf_size, 0);
3719 reply = rs->buf;
3720 }
3721 }
3722
3723 static struct serial *
3724 remote_serial_open (const char *name)
3725 {
3726 static int udp_warning = 0;
3727
3728 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
3729 of in ser-tcp.c, because it is the remote protocol assuming that the
3730 serial connection is reliable and not the serial connection promising
3731 to be. */
3732 if (!udp_warning && strncmp (name, "udp:", 4) == 0)
3733 {
3734 warning (_("The remote protocol may be unreliable over UDP.\n"
3735 "Some events may be lost, rendering further debugging "
3736 "impossible."));
3737 udp_warning = 1;
3738 }
3739
3740 return serial_open (name);
3741 }
3742
3743 /* Inform the target of our permission settings. The permission flags
3744 work without this, but if the target knows the settings, it can do
3745 a couple things. First, it can add its own check, to catch cases
3746 that somehow manage to get by the permissions checks in target
3747 methods. Second, if the target is wired to disallow particular
3748 settings (for instance, a system in the field that is not set up to
3749 be able to stop at a breakpoint), it can object to any unavailable
3750 permissions. */
3751
3752 void
3753 remote_set_permissions (struct target_ops *self)
3754 {
3755 struct remote_state *rs = get_remote_state ();
3756
3757 xsnprintf (rs->buf, get_remote_packet_size (), "QAllow:"
3758 "WriteReg:%x;WriteMem:%x;"
3759 "InsertBreak:%x;InsertTrace:%x;"
3760 "InsertFastTrace:%x;Stop:%x",
3761 may_write_registers, may_write_memory,
3762 may_insert_breakpoints, may_insert_tracepoints,
3763 may_insert_fast_tracepoints, may_stop);
3764 putpkt (rs->buf);
3765 getpkt (&rs->buf, &rs->buf_size, 0);
3766
3767 /* If the target didn't like the packet, warn the user. Do not try
3768 to undo the user's settings, that would just be maddening. */
3769 if (strcmp (rs->buf, "OK") != 0)
3770 warning (_("Remote refused setting permissions with: %s"), rs->buf);
3771 }
3772
3773 /* This type describes each known response to the qSupported
3774 packet. */
3775 struct protocol_feature
3776 {
3777 /* The name of this protocol feature. */
3778 const char *name;
3779
3780 /* The default for this protocol feature. */
3781 enum packet_support default_support;
3782
3783 /* The function to call when this feature is reported, or after
3784 qSupported processing if the feature is not supported.
3785 The first argument points to this structure. The second
3786 argument indicates whether the packet requested support be
3787 enabled, disabled, or probed (or the default, if this function
3788 is being called at the end of processing and this feature was
3789 not reported). The third argument may be NULL; if not NULL, it
3790 is a NUL-terminated string taken from the packet following
3791 this feature's name and an equals sign. */
3792 void (*func) (const struct protocol_feature *, enum packet_support,
3793 const char *);
3794
3795 /* The corresponding packet for this feature. Only used if
3796 FUNC is remote_supported_packet. */
3797 int packet;
3798 };
3799
3800 static void
3801 remote_supported_packet (const struct protocol_feature *feature,
3802 enum packet_support support,
3803 const char *argument)
3804 {
3805 if (argument)
3806 {
3807 warning (_("Remote qSupported response supplied an unexpected value for"
3808 " \"%s\"."), feature->name);
3809 return;
3810 }
3811
3812 remote_protocol_packets[feature->packet].support = support;
3813 }
3814
3815 static void
3816 remote_packet_size (const struct protocol_feature *feature,
3817 enum packet_support support, const char *value)
3818 {
3819 struct remote_state *rs = get_remote_state ();
3820
3821 int packet_size;
3822 char *value_end;
3823
3824 if (support != PACKET_ENABLE)
3825 return;
3826
3827 if (value == NULL || *value == '\0')
3828 {
3829 warning (_("Remote target reported \"%s\" without a size."),
3830 feature->name);
3831 return;
3832 }
3833
3834 errno = 0;
3835 packet_size = strtol (value, &value_end, 16);
3836 if (errno != 0 || *value_end != '\0' || packet_size < 0)
3837 {
3838 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
3839 feature->name, value);
3840 return;
3841 }
3842
3843 if (packet_size > MAX_REMOTE_PACKET_SIZE)
3844 {
3845 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
3846 packet_size, MAX_REMOTE_PACKET_SIZE);
3847 packet_size = MAX_REMOTE_PACKET_SIZE;
3848 }
3849
3850 /* Record the new maximum packet size. */
3851 rs->explicit_packet_size = packet_size;
3852 }
3853
3854 static const struct protocol_feature remote_protocol_features[] = {
3855 { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
3856 { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
3857 PACKET_qXfer_auxv },
3858 { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet,
3859 PACKET_qXfer_features },
3860 { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet,
3861 PACKET_qXfer_libraries },
3862 { "qXfer:libraries-svr4:read", PACKET_DISABLE, remote_supported_packet,
3863 PACKET_qXfer_libraries_svr4 },
3864 { "augmented-libraries-svr4-read", PACKET_DISABLE,
3865 remote_supported_packet, PACKET_augmented_libraries_svr4_read_feature },
3866 { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet,
3867 PACKET_qXfer_memory_map },
3868 { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet,
3869 PACKET_qXfer_spu_read },
3870 { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet,
3871 PACKET_qXfer_spu_write },
3872 { "qXfer:osdata:read", PACKET_DISABLE, remote_supported_packet,
3873 PACKET_qXfer_osdata },
3874 { "qXfer:threads:read", PACKET_DISABLE, remote_supported_packet,
3875 PACKET_qXfer_threads },
3876 { "qXfer:traceframe-info:read", PACKET_DISABLE, remote_supported_packet,
3877 PACKET_qXfer_traceframe_info },
3878 { "QPassSignals", PACKET_DISABLE, remote_supported_packet,
3879 PACKET_QPassSignals },
3880 { "QProgramSignals", PACKET_DISABLE, remote_supported_packet,
3881 PACKET_QProgramSignals },
3882 { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet,
3883 PACKET_QStartNoAckMode },
3884 { "multiprocess", PACKET_DISABLE, remote_supported_packet,
3885 PACKET_multiprocess_feature },
3886 { "QNonStop", PACKET_DISABLE, remote_supported_packet, PACKET_QNonStop },
3887 { "qXfer:siginfo:read", PACKET_DISABLE, remote_supported_packet,
3888 PACKET_qXfer_siginfo_read },
3889 { "qXfer:siginfo:write", PACKET_DISABLE, remote_supported_packet,
3890 PACKET_qXfer_siginfo_write },
3891 { "ConditionalTracepoints", PACKET_DISABLE, remote_supported_packet,
3892 PACKET_ConditionalTracepoints },
3893 { "ConditionalBreakpoints", PACKET_DISABLE, remote_supported_packet,
3894 PACKET_ConditionalBreakpoints },
3895 { "BreakpointCommands", PACKET_DISABLE, remote_supported_packet,
3896 PACKET_BreakpointCommands },
3897 { "FastTracepoints", PACKET_DISABLE, remote_supported_packet,
3898 PACKET_FastTracepoints },
3899 { "StaticTracepoints", PACKET_DISABLE, remote_supported_packet,
3900 PACKET_StaticTracepoints },
3901 {"InstallInTrace", PACKET_DISABLE, remote_supported_packet,
3902 PACKET_InstallInTrace},
3903 { "DisconnectedTracing", PACKET_DISABLE, remote_supported_packet,
3904 PACKET_DisconnectedTracing_feature },
3905 { "ReverseContinue", PACKET_DISABLE, remote_supported_packet,
3906 PACKET_bc },
3907 { "ReverseStep", PACKET_DISABLE, remote_supported_packet,
3908 PACKET_bs },
3909 { "TracepointSource", PACKET_DISABLE, remote_supported_packet,
3910 PACKET_TracepointSource },
3911 { "QAllow", PACKET_DISABLE, remote_supported_packet,
3912 PACKET_QAllow },
3913 { "EnableDisableTracepoints", PACKET_DISABLE, remote_supported_packet,
3914 PACKET_EnableDisableTracepoints_feature },
3915 { "qXfer:fdpic:read", PACKET_DISABLE, remote_supported_packet,
3916 PACKET_qXfer_fdpic },
3917 { "qXfer:uib:read", PACKET_DISABLE, remote_supported_packet,
3918 PACKET_qXfer_uib },
3919 { "QDisableRandomization", PACKET_DISABLE, remote_supported_packet,
3920 PACKET_QDisableRandomization },
3921 { "QAgent", PACKET_DISABLE, remote_supported_packet, PACKET_QAgent},
3922 { "QTBuffer:size", PACKET_DISABLE,
3923 remote_supported_packet, PACKET_QTBuffer_size},
3924 { "tracenz", PACKET_DISABLE, remote_supported_packet, PACKET_tracenz_feature },
3925 { "Qbtrace:off", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_off },
3926 { "Qbtrace:bts", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_bts },
3927 { "qXfer:btrace:read", PACKET_DISABLE, remote_supported_packet,
3928 PACKET_qXfer_btrace }
3929 };
3930
3931 static char *remote_support_xml;
3932
3933 /* Register string appended to "xmlRegisters=" in qSupported query. */
3934
3935 void
3936 register_remote_support_xml (const char *xml)
3937 {
3938 #if defined(HAVE_LIBEXPAT)
3939 if (remote_support_xml == NULL)
3940 remote_support_xml = concat ("xmlRegisters=", xml, (char *) NULL);
3941 else
3942 {
3943 char *copy = xstrdup (remote_support_xml + 13);
3944 char *p = strtok (copy, ",");
3945
3946 do
3947 {
3948 if (strcmp (p, xml) == 0)
3949 {
3950 /* already there */
3951 xfree (copy);
3952 return;
3953 }
3954 }
3955 while ((p = strtok (NULL, ",")) != NULL);
3956 xfree (copy);
3957
3958 remote_support_xml = reconcat (remote_support_xml,
3959 remote_support_xml, ",", xml,
3960 (char *) NULL);
3961 }
3962 #endif
3963 }
3964
3965 static char *
3966 remote_query_supported_append (char *msg, const char *append)
3967 {
3968 if (msg)
3969 return reconcat (msg, msg, ";", append, (char *) NULL);
3970 else
3971 return xstrdup (append);
3972 }
3973
3974 static void
3975 remote_query_supported (void)
3976 {
3977 struct remote_state *rs = get_remote_state ();
3978 char *next;
3979 int i;
3980 unsigned char seen [ARRAY_SIZE (remote_protocol_features)];
3981
3982 /* The packet support flags are handled differently for this packet
3983 than for most others. We treat an error, a disabled packet, and
3984 an empty response identically: any features which must be reported
3985 to be used will be automatically disabled. An empty buffer
3986 accomplishes this, since that is also the representation for a list
3987 containing no features. */
3988
3989 rs->buf[0] = 0;
3990 if (packet_support (PACKET_qSupported) != PACKET_DISABLE)
3991 {
3992 char *q = NULL;
3993 struct cleanup *old_chain = make_cleanup (free_current_contents, &q);
3994
3995 q = remote_query_supported_append (q, "multiprocess+");
3996
3997 if (remote_support_xml)
3998 q = remote_query_supported_append (q, remote_support_xml);
3999
4000 q = remote_query_supported_append (q, "qRelocInsn+");
4001
4002 q = reconcat (q, "qSupported:", q, (char *) NULL);
4003 putpkt (q);
4004
4005 do_cleanups (old_chain);
4006
4007 getpkt (&rs->buf, &rs->buf_size, 0);
4008
4009 /* If an error occured, warn, but do not return - just reset the
4010 buffer to empty and go on to disable features. */
4011 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported])
4012 == PACKET_ERROR)
4013 {
4014 warning (_("Remote failure reply: %s"), rs->buf);
4015 rs->buf[0] = 0;
4016 }
4017 }
4018
4019 memset (seen, 0, sizeof (seen));
4020
4021 next = rs->buf;
4022 while (*next)
4023 {
4024 enum packet_support is_supported;
4025 char *p, *end, *name_end, *value;
4026
4027 /* First separate out this item from the rest of the packet. If
4028 there's another item after this, we overwrite the separator
4029 (terminated strings are much easier to work with). */
4030 p = next;
4031 end = strchr (p, ';');
4032 if (end == NULL)
4033 {
4034 end = p + strlen (p);
4035 next = end;
4036 }
4037 else
4038 {
4039 *end = '\0';
4040 next = end + 1;
4041
4042 if (end == p)
4043 {
4044 warning (_("empty item in \"qSupported\" response"));
4045 continue;
4046 }
4047 }
4048
4049 name_end = strchr (p, '=');
4050 if (name_end)
4051 {
4052 /* This is a name=value entry. */
4053 is_supported = PACKET_ENABLE;
4054 value = name_end + 1;
4055 *name_end = '\0';
4056 }
4057 else
4058 {
4059 value = NULL;
4060 switch (end[-1])
4061 {
4062 case '+':
4063 is_supported = PACKET_ENABLE;
4064 break;
4065
4066 case '-':
4067 is_supported = PACKET_DISABLE;
4068 break;
4069
4070 case '?':
4071 is_supported = PACKET_SUPPORT_UNKNOWN;
4072 break;
4073
4074 default:
4075 warning (_("unrecognized item \"%s\" "
4076 "in \"qSupported\" response"), p);
4077 continue;
4078 }
4079 end[-1] = '\0';
4080 }
4081
4082 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
4083 if (strcmp (remote_protocol_features[i].name, p) == 0)
4084 {
4085 const struct protocol_feature *feature;
4086
4087 seen[i] = 1;
4088 feature = &remote_protocol_features[i];
4089 feature->func (feature, is_supported, value);
4090 break;
4091 }
4092 }
4093
4094 /* If we increased the packet size, make sure to increase the global
4095 buffer size also. We delay this until after parsing the entire
4096 qSupported packet, because this is the same buffer we were
4097 parsing. */
4098 if (rs->buf_size < rs->explicit_packet_size)
4099 {
4100 rs->buf_size = rs->explicit_packet_size;
4101 rs->buf = xrealloc (rs->buf, rs->buf_size);
4102 }
4103
4104 /* Handle the defaults for unmentioned features. */
4105 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
4106 if (!seen[i])
4107 {
4108 const struct protocol_feature *feature;
4109
4110 feature = &remote_protocol_features[i];
4111 feature->func (feature, feature->default_support, NULL);
4112 }
4113 }
4114
4115 /* Remove any of the remote.c targets from target stack. Upper targets depend
4116 on it so remove them first. */
4117
4118 static void
4119 remote_unpush_target (void)
4120 {
4121 pop_all_targets_above (process_stratum - 1);
4122 }
4123
4124 static void
4125 remote_open_1 (const char *name, int from_tty,
4126 struct target_ops *target, int extended_p)
4127 {
4128 struct remote_state *rs = get_remote_state ();
4129
4130 if (name == 0)
4131 error (_("To open a remote debug connection, you need to specify what\n"
4132 "serial device is attached to the remote system\n"
4133 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
4134
4135 /* See FIXME above. */
4136 if (!target_async_permitted)
4137 wait_forever_enabled_p = 1;
4138
4139 /* If we're connected to a running target, target_preopen will kill it.
4140 Ask this question first, before target_preopen has a chance to kill
4141 anything. */
4142 if (rs->remote_desc != NULL && !have_inferiors ())
4143 {
4144 if (from_tty
4145 && !query (_("Already connected to a remote target. Disconnect? ")))
4146 error (_("Still connected."));
4147 }
4148
4149 /* Here the possibly existing remote target gets unpushed. */
4150 target_preopen (from_tty);
4151
4152 /* Make sure we send the passed signals list the next time we resume. */
4153 xfree (rs->last_pass_packet);
4154 rs->last_pass_packet = NULL;
4155
4156 /* Make sure we send the program signals list the next time we
4157 resume. */
4158 xfree (rs->last_program_signals_packet);
4159 rs->last_program_signals_packet = NULL;
4160
4161 remote_fileio_reset ();
4162 reopen_exec_file ();
4163 reread_symbols ();
4164
4165 rs->remote_desc = remote_serial_open (name);
4166 if (!rs->remote_desc)
4167 perror_with_name (name);
4168
4169 if (baud_rate != -1)
4170 {
4171 if (serial_setbaudrate (rs->remote_desc, baud_rate))
4172 {
4173 /* The requested speed could not be set. Error out to
4174 top level after closing remote_desc. Take care to
4175 set remote_desc to NULL to avoid closing remote_desc
4176 more than once. */
4177 serial_close (rs->remote_desc);
4178 rs->remote_desc = NULL;
4179 perror_with_name (name);
4180 }
4181 }
4182
4183 serial_raw (rs->remote_desc);
4184
4185 /* If there is something sitting in the buffer we might take it as a
4186 response to a command, which would be bad. */
4187 serial_flush_input (rs->remote_desc);
4188
4189 if (from_tty)
4190 {
4191 puts_filtered ("Remote debugging using ");
4192 puts_filtered (name);
4193 puts_filtered ("\n");
4194 }
4195 push_target (target); /* Switch to using remote target now. */
4196
4197 /* Register extra event sources in the event loop. */
4198 remote_async_inferior_event_token
4199 = create_async_event_handler (remote_async_inferior_event_handler,
4200 NULL);
4201 rs->notif_state = remote_notif_state_allocate ();
4202
4203 /* Reset the target state; these things will be queried either by
4204 remote_query_supported or as they are needed. */
4205 reset_all_packet_configs_support ();
4206 rs->cached_wait_status = 0;
4207 rs->explicit_packet_size = 0;
4208 rs->noack_mode = 0;
4209 rs->extended = extended_p;
4210 rs->waiting_for_stop_reply = 0;
4211 rs->ctrlc_pending_p = 0;
4212
4213 rs->general_thread = not_sent_ptid;
4214 rs->continue_thread = not_sent_ptid;
4215 rs->remote_traceframe_number = -1;
4216
4217 /* Probe for ability to use "ThreadInfo" query, as required. */
4218 rs->use_threadinfo_query = 1;
4219 rs->use_threadextra_query = 1;
4220
4221 if (target_async_permitted)
4222 {
4223 /* With this target we start out by owning the terminal. */
4224 remote_async_terminal_ours_p = 1;
4225
4226 /* FIXME: cagney/1999-09-23: During the initial connection it is
4227 assumed that the target is already ready and able to respond to
4228 requests. Unfortunately remote_start_remote() eventually calls
4229 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
4230 around this. Eventually a mechanism that allows
4231 wait_for_inferior() to expect/get timeouts will be
4232 implemented. */
4233 wait_forever_enabled_p = 0;
4234 }
4235
4236 /* First delete any symbols previously loaded from shared libraries. */
4237 no_shared_libraries (NULL, 0);
4238
4239 /* Start afresh. */
4240 init_thread_list ();
4241
4242 /* Start the remote connection. If error() or QUIT, discard this
4243 target (we'd otherwise be in an inconsistent state) and then
4244 propogate the error on up the exception chain. This ensures that
4245 the caller doesn't stumble along blindly assuming that the
4246 function succeeded. The CLI doesn't have this problem but other
4247 UI's, such as MI do.
4248
4249 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
4250 this function should return an error indication letting the
4251 caller restore the previous state. Unfortunately the command
4252 ``target remote'' is directly wired to this function making that
4253 impossible. On a positive note, the CLI side of this problem has
4254 been fixed - the function set_cmd_context() makes it possible for
4255 all the ``target ....'' commands to share a common callback
4256 function. See cli-dump.c. */
4257 {
4258 volatile struct gdb_exception ex;
4259
4260 TRY_CATCH (ex, RETURN_MASK_ALL)
4261 {
4262 remote_start_remote (from_tty, target, extended_p);
4263 }
4264 if (ex.reason < 0)
4265 {
4266 /* Pop the partially set up target - unless something else did
4267 already before throwing the exception. */
4268 if (rs->remote_desc != NULL)
4269 remote_unpush_target ();
4270 if (target_async_permitted)
4271 wait_forever_enabled_p = 1;
4272 throw_exception (ex);
4273 }
4274 }
4275
4276 if (target_async_permitted)
4277 wait_forever_enabled_p = 1;
4278 }
4279
4280 /* This takes a program previously attached to and detaches it. After
4281 this is done, GDB can be used to debug some other program. We
4282 better not have left any breakpoints in the target program or it'll
4283 die when it hits one. */
4284
4285 static void
4286 remote_detach_1 (const char *args, int from_tty, int extended)
4287 {
4288 int pid = ptid_get_pid (inferior_ptid);
4289 struct remote_state *rs = get_remote_state ();
4290
4291 if (args)
4292 error (_("Argument given to \"detach\" when remotely debugging."));
4293
4294 if (!target_has_execution)
4295 error (_("No process to detach from."));
4296
4297 if (from_tty)
4298 {
4299 char *exec_file = get_exec_file (0);
4300 if (exec_file == NULL)
4301 exec_file = "";
4302 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file,
4303 target_pid_to_str (pid_to_ptid (pid)));
4304 gdb_flush (gdb_stdout);
4305 }
4306
4307 /* Tell the remote target to detach. */
4308 if (remote_multi_process_p (rs))
4309 xsnprintf (rs->buf, get_remote_packet_size (), "D;%x", pid);
4310 else
4311 strcpy (rs->buf, "D");
4312
4313 putpkt (rs->buf);
4314 getpkt (&rs->buf, &rs->buf_size, 0);
4315
4316 if (rs->buf[0] == 'O' && rs->buf[1] == 'K')
4317 ;
4318 else if (rs->buf[0] == '\0')
4319 error (_("Remote doesn't know how to detach"));
4320 else
4321 error (_("Can't detach process."));
4322
4323 if (from_tty && !extended)
4324 puts_filtered (_("Ending remote debugging.\n"));
4325
4326 target_mourn_inferior ();
4327 }
4328
4329 static void
4330 remote_detach (struct target_ops *ops, const char *args, int from_tty)
4331 {
4332 remote_detach_1 (args, from_tty, 0);
4333 }
4334
4335 static void
4336 extended_remote_detach (struct target_ops *ops, const char *args, int from_tty)
4337 {
4338 remote_detach_1 (args, from_tty, 1);
4339 }
4340
4341 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
4342
4343 static void
4344 remote_disconnect (struct target_ops *target, const char *args, int from_tty)
4345 {
4346 if (args)
4347 error (_("Argument given to \"disconnect\" when remotely debugging."));
4348
4349 /* Make sure we unpush even the extended remote targets; mourn
4350 won't do it. So call remote_mourn_1 directly instead of
4351 target_mourn_inferior. */
4352 remote_mourn_1 (target);
4353
4354 if (from_tty)
4355 puts_filtered ("Ending remote debugging.\n");
4356 }
4357
4358 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
4359 be chatty about it. */
4360
4361 static void
4362 extended_remote_attach_1 (struct target_ops *target, const char *args,
4363 int from_tty)
4364 {
4365 struct remote_state *rs = get_remote_state ();
4366 int pid;
4367 char *wait_status = NULL;
4368
4369 pid = parse_pid_to_attach (args);
4370
4371 /* Remote PID can be freely equal to getpid, do not check it here the same
4372 way as in other targets. */
4373
4374 if (packet_support (PACKET_vAttach) == PACKET_DISABLE)
4375 error (_("This target does not support attaching to a process"));
4376
4377 if (from_tty)
4378 {
4379 char *exec_file = get_exec_file (0);
4380
4381 if (exec_file)
4382 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file,
4383 target_pid_to_str (pid_to_ptid (pid)));
4384 else
4385 printf_unfiltered (_("Attaching to %s\n"),
4386 target_pid_to_str (pid_to_ptid (pid)));
4387
4388 gdb_flush (gdb_stdout);
4389 }
4390
4391 xsnprintf (rs->buf, get_remote_packet_size (), "vAttach;%x", pid);
4392 putpkt (rs->buf);
4393 getpkt (&rs->buf, &rs->buf_size, 0);
4394
4395 switch (packet_ok (rs->buf,
4396 &remote_protocol_packets[PACKET_vAttach]))
4397 {
4398 case PACKET_OK:
4399 if (!non_stop)
4400 {
4401 /* Save the reply for later. */
4402 wait_status = alloca (strlen (rs->buf) + 1);
4403 strcpy (wait_status, rs->buf);
4404 }
4405 else if (strcmp (rs->buf, "OK") != 0)
4406 error (_("Attaching to %s failed with: %s"),
4407 target_pid_to_str (pid_to_ptid (pid)),
4408 rs->buf);
4409 break;
4410 case PACKET_UNKNOWN:
4411 error (_("This target does not support attaching to a process"));
4412 default:
4413 error (_("Attaching to %s failed"),
4414 target_pid_to_str (pid_to_ptid (pid)));
4415 }
4416
4417 set_current_inferior (remote_add_inferior (0, pid, 1));
4418
4419 inferior_ptid = pid_to_ptid (pid);
4420
4421 if (non_stop)
4422 {
4423 struct thread_info *thread;
4424
4425 /* Get list of threads. */
4426 remote_threads_info (target);
4427
4428 thread = first_thread_of_process (pid);
4429 if (thread)
4430 inferior_ptid = thread->ptid;
4431 else
4432 inferior_ptid = pid_to_ptid (pid);
4433
4434 /* Invalidate our notion of the remote current thread. */
4435 record_currthread (rs, minus_one_ptid);
4436 }
4437 else
4438 {
4439 /* Now, if we have thread information, update inferior_ptid. */
4440 inferior_ptid = remote_current_thread (inferior_ptid);
4441
4442 /* Add the main thread to the thread list. */
4443 add_thread_silent (inferior_ptid);
4444 }
4445
4446 /* Next, if the target can specify a description, read it. We do
4447 this before anything involving memory or registers. */
4448 target_find_description ();
4449
4450 if (!non_stop)
4451 {
4452 /* Use the previously fetched status. */
4453 gdb_assert (wait_status != NULL);
4454
4455 if (target_can_async_p ())
4456 {
4457 struct notif_event *reply
4458 = remote_notif_parse (&notif_client_stop, wait_status);
4459
4460 push_stop_reply ((struct stop_reply *) reply);
4461
4462 target_async (inferior_event_handler, 0);
4463 }
4464 else
4465 {
4466 gdb_assert (wait_status != NULL);
4467 strcpy (rs->buf, wait_status);
4468 rs->cached_wait_status = 1;
4469 }
4470 }
4471 else
4472 gdb_assert (wait_status == NULL);
4473 }
4474
4475 static void
4476 extended_remote_attach (struct target_ops *ops, const char *args, int from_tty)
4477 {
4478 extended_remote_attach_1 (ops, args, from_tty);
4479 }
4480
4481 /* Implementation of the to_post_attach method. */
4482
4483 static void
4484 extended_remote_post_attach (struct target_ops *ops, int pid)
4485 {
4486 /* In certain cases GDB might not have had the chance to start
4487 symbol lookup up until now. This could happen if the debugged
4488 binary is not using shared libraries, the vsyscall page is not
4489 present (on Linux) and the binary itself hadn't changed since the
4490 debugging process was started. */
4491 if (symfile_objfile != NULL)
4492 remote_check_symbols();
4493 }
4494
4495 \f
4496 /* Check for the availability of vCont. This function should also check
4497 the response. */
4498
4499 static void
4500 remote_vcont_probe (struct remote_state *rs)
4501 {
4502 char *buf;
4503
4504 strcpy (rs->buf, "vCont?");
4505 putpkt (rs->buf);
4506 getpkt (&rs->buf, &rs->buf_size, 0);
4507 buf = rs->buf;
4508
4509 /* Make sure that the features we assume are supported. */
4510 if (strncmp (buf, "vCont", 5) == 0)
4511 {
4512 char *p = &buf[5];
4513 int support_s, support_S, support_c, support_C;
4514
4515 support_s = 0;
4516 support_S = 0;
4517 support_c = 0;
4518 support_C = 0;
4519 rs->supports_vCont.t = 0;
4520 rs->supports_vCont.r = 0;
4521 while (p && *p == ';')
4522 {
4523 p++;
4524 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
4525 support_s = 1;
4526 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
4527 support_S = 1;
4528 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
4529 support_c = 1;
4530 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
4531 support_C = 1;
4532 else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0))
4533 rs->supports_vCont.t = 1;
4534 else if (*p == 'r' && (*(p + 1) == ';' || *(p + 1) == 0))
4535 rs->supports_vCont.r = 1;
4536
4537 p = strchr (p, ';');
4538 }
4539
4540 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
4541 BUF will make packet_ok disable the packet. */
4542 if (!support_s || !support_S || !support_c || !support_C)
4543 buf[0] = 0;
4544 }
4545
4546 packet_ok (buf, &remote_protocol_packets[PACKET_vCont]);
4547 }
4548
4549 /* Helper function for building "vCont" resumptions. Write a
4550 resumption to P. ENDP points to one-passed-the-end of the buffer
4551 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
4552 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
4553 resumed thread should be single-stepped and/or signalled. If PTID
4554 equals minus_one_ptid, then all threads are resumed; if PTID
4555 represents a process, then all threads of the process are resumed;
4556 the thread to be stepped and/or signalled is given in the global
4557 INFERIOR_PTID. */
4558
4559 static char *
4560 append_resumption (char *p, char *endp,
4561 ptid_t ptid, int step, enum gdb_signal siggnal)
4562 {
4563 struct remote_state *rs = get_remote_state ();
4564
4565 if (step && siggnal != GDB_SIGNAL_0)
4566 p += xsnprintf (p, endp - p, ";S%02x", siggnal);
4567 else if (step
4568 /* GDB is willing to range step. */
4569 && use_range_stepping
4570 /* Target supports range stepping. */
4571 && rs->supports_vCont.r
4572 /* We don't currently support range stepping multiple
4573 threads with a wildcard (though the protocol allows it,
4574 so stubs shouldn't make an active effort to forbid
4575 it). */
4576 && !(remote_multi_process_p (rs) && ptid_is_pid (ptid)))
4577 {
4578 struct thread_info *tp;
4579
4580 if (ptid_equal (ptid, minus_one_ptid))
4581 {
4582 /* If we don't know about the target thread's tid, then
4583 we're resuming magic_null_ptid (see caller). */
4584 tp = find_thread_ptid (magic_null_ptid);
4585 }
4586 else
4587 tp = find_thread_ptid (ptid);
4588 gdb_assert (tp != NULL);
4589
4590 if (tp->control.may_range_step)
4591 {
4592 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
4593
4594 p += xsnprintf (p, endp - p, ";r%s,%s",
4595 phex_nz (tp->control.step_range_start,
4596 addr_size),
4597 phex_nz (tp->control.step_range_end,
4598 addr_size));
4599 }
4600 else
4601 p += xsnprintf (p, endp - p, ";s");
4602 }
4603 else if (step)
4604 p += xsnprintf (p, endp - p, ";s");
4605 else if (siggnal != GDB_SIGNAL_0)
4606 p += xsnprintf (p, endp - p, ";C%02x", siggnal);
4607 else
4608 p += xsnprintf (p, endp - p, ";c");
4609
4610 if (remote_multi_process_p (rs) && ptid_is_pid (ptid))
4611 {
4612 ptid_t nptid;
4613
4614 /* All (-1) threads of process. */
4615 nptid = ptid_build (ptid_get_pid (ptid), -1, 0);
4616
4617 p += xsnprintf (p, endp - p, ":");
4618 p = write_ptid (p, endp, nptid);
4619 }
4620 else if (!ptid_equal (ptid, minus_one_ptid))
4621 {
4622 p += xsnprintf (p, endp - p, ":");
4623 p = write_ptid (p, endp, ptid);
4624 }
4625
4626 return p;
4627 }
4628
4629 /* Append a vCont continue-with-signal action for threads that have a
4630 non-zero stop signal. */
4631
4632 static char *
4633 append_pending_thread_resumptions (char *p, char *endp, ptid_t ptid)
4634 {
4635 struct thread_info *thread;
4636
4637 ALL_NON_EXITED_THREADS (thread)
4638 if (ptid_match (thread->ptid, ptid)
4639 && !ptid_equal (inferior_ptid, thread->ptid)
4640 && thread->suspend.stop_signal != GDB_SIGNAL_0)
4641 {
4642 p = append_resumption (p, endp, thread->ptid,
4643 0, thread->suspend.stop_signal);
4644 thread->suspend.stop_signal = GDB_SIGNAL_0;
4645 }
4646
4647 return p;
4648 }
4649
4650 /* Resume the remote inferior by using a "vCont" packet. The thread
4651 to be resumed is PTID; STEP and SIGGNAL indicate whether the
4652 resumed thread should be single-stepped and/or signalled. If PTID
4653 equals minus_one_ptid, then all threads are resumed; the thread to
4654 be stepped and/or signalled is given in the global INFERIOR_PTID.
4655 This function returns non-zero iff it resumes the inferior.
4656
4657 This function issues a strict subset of all possible vCont commands at the
4658 moment. */
4659
4660 static int
4661 remote_vcont_resume (ptid_t ptid, int step, enum gdb_signal siggnal)
4662 {
4663 struct remote_state *rs = get_remote_state ();
4664 char *p;
4665 char *endp;
4666
4667 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
4668 remote_vcont_probe (rs);
4669
4670 if (packet_support (PACKET_vCont) == PACKET_DISABLE)
4671 return 0;
4672
4673 p = rs->buf;
4674 endp = rs->buf + get_remote_packet_size ();
4675
4676 /* If we could generate a wider range of packets, we'd have to worry
4677 about overflowing BUF. Should there be a generic
4678 "multi-part-packet" packet? */
4679
4680 p += xsnprintf (p, endp - p, "vCont");
4681
4682 if (ptid_equal (ptid, magic_null_ptid))
4683 {
4684 /* MAGIC_NULL_PTID means that we don't have any active threads,
4685 so we don't have any TID numbers the inferior will
4686 understand. Make sure to only send forms that do not specify
4687 a TID. */
4688 append_resumption (p, endp, minus_one_ptid, step, siggnal);
4689 }
4690 else if (ptid_equal (ptid, minus_one_ptid) || ptid_is_pid (ptid))
4691 {
4692 /* Resume all threads (of all processes, or of a single
4693 process), with preference for INFERIOR_PTID. This assumes
4694 inferior_ptid belongs to the set of all threads we are about
4695 to resume. */
4696 if (step || siggnal != GDB_SIGNAL_0)
4697 {
4698 /* Step inferior_ptid, with or without signal. */
4699 p = append_resumption (p, endp, inferior_ptid, step, siggnal);
4700 }
4701
4702 /* Also pass down any pending signaled resumption for other
4703 threads not the current. */
4704 p = append_pending_thread_resumptions (p, endp, ptid);
4705
4706 /* And continue others without a signal. */
4707 append_resumption (p, endp, ptid, /*step=*/ 0, GDB_SIGNAL_0);
4708 }
4709 else
4710 {
4711 /* Scheduler locking; resume only PTID. */
4712 append_resumption (p, endp, ptid, step, siggnal);
4713 }
4714
4715 gdb_assert (strlen (rs->buf) < get_remote_packet_size ());
4716 putpkt (rs->buf);
4717
4718 if (non_stop)
4719 {
4720 /* In non-stop, the stub replies to vCont with "OK". The stop
4721 reply will be reported asynchronously by means of a `%Stop'
4722 notification. */
4723 getpkt (&rs->buf, &rs->buf_size, 0);
4724 if (strcmp (rs->buf, "OK") != 0)
4725 error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf);
4726 }
4727
4728 return 1;
4729 }
4730
4731 /* Tell the remote machine to resume. */
4732
4733 static void
4734 remote_resume (struct target_ops *ops,
4735 ptid_t ptid, int step, enum gdb_signal siggnal)
4736 {
4737 struct remote_state *rs = get_remote_state ();
4738 char *buf;
4739
4740 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
4741 (explained in remote-notif.c:handle_notification) so
4742 remote_notif_process is not called. We need find a place where
4743 it is safe to start a 'vNotif' sequence. It is good to do it
4744 before resuming inferior, because inferior was stopped and no RSP
4745 traffic at that moment. */
4746 if (!non_stop)
4747 remote_notif_process (rs->notif_state, &notif_client_stop);
4748
4749 rs->last_sent_signal = siggnal;
4750 rs->last_sent_step = step;
4751
4752 /* The vCont packet doesn't need to specify threads via Hc. */
4753 /* No reverse support (yet) for vCont. */
4754 if (execution_direction != EXEC_REVERSE)
4755 if (remote_vcont_resume (ptid, step, siggnal))
4756 goto done;
4757
4758 /* All other supported resume packets do use Hc, so set the continue
4759 thread. */
4760 if (ptid_equal (ptid, minus_one_ptid))
4761 set_continue_thread (any_thread_ptid);
4762 else
4763 set_continue_thread (ptid);
4764
4765 buf = rs->buf;
4766 if (execution_direction == EXEC_REVERSE)
4767 {
4768 /* We don't pass signals to the target in reverse exec mode. */
4769 if (info_verbose && siggnal != GDB_SIGNAL_0)
4770 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
4771 siggnal);
4772
4773 if (step && packet_support (PACKET_bs) == PACKET_DISABLE)
4774 error (_("Remote reverse-step not supported."));
4775 if (!step && packet_support (PACKET_bc) == PACKET_DISABLE)
4776 error (_("Remote reverse-continue not supported."));
4777
4778 strcpy (buf, step ? "bs" : "bc");
4779 }
4780 else if (siggnal != GDB_SIGNAL_0)
4781 {
4782 buf[0] = step ? 'S' : 'C';
4783 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
4784 buf[2] = tohex (((int) siggnal) & 0xf);
4785 buf[3] = '\0';
4786 }
4787 else
4788 strcpy (buf, step ? "s" : "c");
4789
4790 putpkt (buf);
4791
4792 done:
4793 /* We are about to start executing the inferior, let's register it
4794 with the event loop. NOTE: this is the one place where all the
4795 execution commands end up. We could alternatively do this in each
4796 of the execution commands in infcmd.c. */
4797 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
4798 into infcmd.c in order to allow inferior function calls to work
4799 NOT asynchronously. */
4800 if (target_can_async_p ())
4801 target_async (inferior_event_handler, 0);
4802
4803 /* We've just told the target to resume. The remote server will
4804 wait for the inferior to stop, and then send a stop reply. In
4805 the mean time, we can't start another command/query ourselves
4806 because the stub wouldn't be ready to process it. This applies
4807 only to the base all-stop protocol, however. In non-stop (which
4808 only supports vCont), the stub replies with an "OK", and is
4809 immediate able to process further serial input. */
4810 if (!non_stop)
4811 rs->waiting_for_stop_reply = 1;
4812 }
4813 \f
4814
4815 /* Set up the signal handler for SIGINT, while the target is
4816 executing, ovewriting the 'regular' SIGINT signal handler. */
4817 static void
4818 async_initialize_sigint_signal_handler (void)
4819 {
4820 signal (SIGINT, async_handle_remote_sigint);
4821 }
4822
4823 /* Signal handler for SIGINT, while the target is executing. */
4824 static void
4825 async_handle_remote_sigint (int sig)
4826 {
4827 signal (sig, async_handle_remote_sigint_twice);
4828 /* Note we need to go through gdb_call_async_signal_handler in order
4829 to wake up the event loop on Windows. */
4830 gdb_call_async_signal_handler (async_sigint_remote_token, 0);
4831 }
4832
4833 /* Signal handler for SIGINT, installed after SIGINT has already been
4834 sent once. It will take effect the second time that the user sends
4835 a ^C. */
4836 static void
4837 async_handle_remote_sigint_twice (int sig)
4838 {
4839 signal (sig, async_handle_remote_sigint);
4840 /* See note in async_handle_remote_sigint. */
4841 gdb_call_async_signal_handler (async_sigint_remote_twice_token, 0);
4842 }
4843
4844 /* Perform the real interruption of the target execution, in response
4845 to a ^C. */
4846 static void
4847 async_remote_interrupt (gdb_client_data arg)
4848 {
4849 if (remote_debug)
4850 fprintf_unfiltered (gdb_stdlog, "async_remote_interrupt called\n");
4851
4852 target_stop (inferior_ptid);
4853 }
4854
4855 /* Perform interrupt, if the first attempt did not succeed. Just give
4856 up on the target alltogether. */
4857 static void
4858 async_remote_interrupt_twice (gdb_client_data arg)
4859 {
4860 if (remote_debug)
4861 fprintf_unfiltered (gdb_stdlog, "async_remote_interrupt_twice called\n");
4862
4863 interrupt_query ();
4864 }
4865
4866 /* Reinstall the usual SIGINT handlers, after the target has
4867 stopped. */
4868 static void
4869 async_cleanup_sigint_signal_handler (void *dummy)
4870 {
4871 signal (SIGINT, handle_sigint);
4872 }
4873
4874 /* Send ^C to target to halt it. Target will respond, and send us a
4875 packet. */
4876 static void (*ofunc) (int);
4877
4878 /* The command line interface's stop routine. This function is installed
4879 as a signal handler for SIGINT. The first time a user requests a
4880 stop, we call remote_stop to send a break or ^C. If there is no
4881 response from the target (it didn't stop when the user requested it),
4882 we ask the user if he'd like to detach from the target. */
4883 static void
4884 sync_remote_interrupt (int signo)
4885 {
4886 /* If this doesn't work, try more severe steps. */
4887 signal (signo, sync_remote_interrupt_twice);
4888
4889 gdb_call_async_signal_handler (async_sigint_remote_token, 1);
4890 }
4891
4892 /* The user typed ^C twice. */
4893
4894 static void
4895 sync_remote_interrupt_twice (int signo)
4896 {
4897 signal (signo, ofunc);
4898 gdb_call_async_signal_handler (async_sigint_remote_twice_token, 1);
4899 signal (signo, sync_remote_interrupt);
4900 }
4901
4902 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
4903 thread, all threads of a remote process, or all threads of all
4904 processes. */
4905
4906 static void
4907 remote_stop_ns (ptid_t ptid)
4908 {
4909 struct remote_state *rs = get_remote_state ();
4910 char *p = rs->buf;
4911 char *endp = rs->buf + get_remote_packet_size ();
4912
4913 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
4914 remote_vcont_probe (rs);
4915
4916 if (!rs->supports_vCont.t)
4917 error (_("Remote server does not support stopping threads"));
4918
4919 if (ptid_equal (ptid, minus_one_ptid)
4920 || (!remote_multi_process_p (rs) && ptid_is_pid (ptid)))
4921 p += xsnprintf (p, endp - p, "vCont;t");
4922 else
4923 {
4924 ptid_t nptid;
4925
4926 p += xsnprintf (p, endp - p, "vCont;t:");
4927
4928 if (ptid_is_pid (ptid))
4929 /* All (-1) threads of process. */
4930 nptid = ptid_build (ptid_get_pid (ptid), -1, 0);
4931 else
4932 {
4933 /* Small optimization: if we already have a stop reply for
4934 this thread, no use in telling the stub we want this
4935 stopped. */
4936 if (peek_stop_reply (ptid))
4937 return;
4938
4939 nptid = ptid;
4940 }
4941
4942 write_ptid (p, endp, nptid);
4943 }
4944
4945 /* In non-stop, we get an immediate OK reply. The stop reply will
4946 come in asynchronously by notification. */
4947 putpkt (rs->buf);
4948 getpkt (&rs->buf, &rs->buf_size, 0);
4949 if (strcmp (rs->buf, "OK") != 0)
4950 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid), rs->buf);
4951 }
4952
4953 /* All-stop version of target_stop. Sends a break or a ^C to stop the
4954 remote target. It is undefined which thread of which process
4955 reports the stop. */
4956
4957 static void
4958 remote_stop_as (ptid_t ptid)
4959 {
4960 struct remote_state *rs = get_remote_state ();
4961
4962 rs->ctrlc_pending_p = 1;
4963
4964 /* If the inferior is stopped already, but the core didn't know
4965 about it yet, just ignore the request. The cached wait status
4966 will be collected in remote_wait. */
4967 if (rs->cached_wait_status)
4968 return;
4969
4970 /* Send interrupt_sequence to remote target. */
4971 send_interrupt_sequence ();
4972 }
4973
4974 /* This is the generic stop called via the target vector. When a target
4975 interrupt is requested, either by the command line or the GUI, we
4976 will eventually end up here. */
4977
4978 static void
4979 remote_stop (struct target_ops *self, ptid_t ptid)
4980 {
4981 if (remote_debug)
4982 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
4983
4984 if (non_stop)
4985 remote_stop_ns (ptid);
4986 else
4987 remote_stop_as (ptid);
4988 }
4989
4990 /* Ask the user what to do when an interrupt is received. */
4991
4992 static void
4993 interrupt_query (void)
4994 {
4995 target_terminal_ours ();
4996
4997 if (target_can_async_p ())
4998 {
4999 signal (SIGINT, handle_sigint);
5000 quit ();
5001 }
5002 else
5003 {
5004 if (query (_("Interrupted while waiting for the program.\n\
5005 Give up (and stop debugging it)? ")))
5006 {
5007 remote_unpush_target ();
5008 quit ();
5009 }
5010 }
5011
5012 target_terminal_inferior ();
5013 }
5014
5015 /* Enable/disable target terminal ownership. Most targets can use
5016 terminal groups to control terminal ownership. Remote targets are
5017 different in that explicit transfer of ownership to/from GDB/target
5018 is required. */
5019
5020 static void
5021 remote_terminal_inferior (struct target_ops *self)
5022 {
5023 if (!target_async_permitted)
5024 /* Nothing to do. */
5025 return;
5026
5027 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
5028 idempotent. The event-loop GDB talking to an asynchronous target
5029 with a synchronous command calls this function from both
5030 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
5031 transfer the terminal to the target when it shouldn't this guard
5032 can go away. */
5033 if (!remote_async_terminal_ours_p)
5034 return;
5035 delete_file_handler (input_fd);
5036 remote_async_terminal_ours_p = 0;
5037 async_initialize_sigint_signal_handler ();
5038 /* NOTE: At this point we could also register our selves as the
5039 recipient of all input. Any characters typed could then be
5040 passed on down to the target. */
5041 }
5042
5043 static void
5044 remote_terminal_ours (struct target_ops *self)
5045 {
5046 if (!target_async_permitted)
5047 /* Nothing to do. */
5048 return;
5049
5050 /* See FIXME in remote_terminal_inferior. */
5051 if (remote_async_terminal_ours_p)
5052 return;
5053 async_cleanup_sigint_signal_handler (NULL);
5054 add_file_handler (input_fd, stdin_event_handler, 0);
5055 remote_async_terminal_ours_p = 1;
5056 }
5057
5058 static void
5059 remote_console_output (char *msg)
5060 {
5061 char *p;
5062
5063 for (p = msg; p[0] && p[1]; p += 2)
5064 {
5065 char tb[2];
5066 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
5067
5068 tb[0] = c;
5069 tb[1] = 0;
5070 fputs_unfiltered (tb, gdb_stdtarg);
5071 }
5072 gdb_flush (gdb_stdtarg);
5073 }
5074
5075 typedef struct cached_reg
5076 {
5077 int num;
5078 gdb_byte data[MAX_REGISTER_SIZE];
5079 } cached_reg_t;
5080
5081 DEF_VEC_O(cached_reg_t);
5082
5083 typedef struct stop_reply
5084 {
5085 struct notif_event base;
5086
5087 /* The identifier of the thread about this event */
5088 ptid_t ptid;
5089
5090 /* The remote state this event is associated with. When the remote
5091 connection, represented by a remote_state object, is closed,
5092 all the associated stop_reply events should be released. */
5093 struct remote_state *rs;
5094
5095 struct target_waitstatus ws;
5096
5097 /* Expedited registers. This makes remote debugging a bit more
5098 efficient for those targets that provide critical registers as
5099 part of their normal status mechanism (as another roundtrip to
5100 fetch them is avoided). */
5101 VEC(cached_reg_t) *regcache;
5102
5103 int stopped_by_watchpoint_p;
5104 CORE_ADDR watch_data_address;
5105
5106 int core;
5107 } *stop_reply_p;
5108
5109 DECLARE_QUEUE_P (stop_reply_p);
5110 DEFINE_QUEUE_P (stop_reply_p);
5111 /* The list of already fetched and acknowledged stop events. This
5112 queue is used for notification Stop, and other notifications
5113 don't need queue for their events, because the notification events
5114 of Stop can't be consumed immediately, so that events should be
5115 queued first, and be consumed by remote_wait_{ns,as} one per
5116 time. Other notifications can consume their events immediately,
5117 so queue is not needed for them. */
5118 static QUEUE (stop_reply_p) *stop_reply_queue;
5119
5120 static void
5121 stop_reply_xfree (struct stop_reply *r)
5122 {
5123 notif_event_xfree ((struct notif_event *) r);
5124 }
5125
5126 static void
5127 remote_notif_stop_parse (struct notif_client *self, char *buf,
5128 struct notif_event *event)
5129 {
5130 remote_parse_stop_reply (buf, (struct stop_reply *) event);
5131 }
5132
5133 static void
5134 remote_notif_stop_ack (struct notif_client *self, char *buf,
5135 struct notif_event *event)
5136 {
5137 struct stop_reply *stop_reply = (struct stop_reply *) event;
5138
5139 /* acknowledge */
5140 putpkt ((char *) self->ack_command);
5141
5142 if (stop_reply->ws.kind == TARGET_WAITKIND_IGNORE)
5143 /* We got an unknown stop reply. */
5144 error (_("Unknown stop reply"));
5145
5146 push_stop_reply (stop_reply);
5147 }
5148
5149 static int
5150 remote_notif_stop_can_get_pending_events (struct notif_client *self)
5151 {
5152 /* We can't get pending events in remote_notif_process for
5153 notification stop, and we have to do this in remote_wait_ns
5154 instead. If we fetch all queued events from stub, remote stub
5155 may exit and we have no chance to process them back in
5156 remote_wait_ns. */
5157 mark_async_event_handler (remote_async_inferior_event_token);
5158 return 0;
5159 }
5160
5161 static void
5162 stop_reply_dtr (struct notif_event *event)
5163 {
5164 struct stop_reply *r = (struct stop_reply *) event;
5165
5166 VEC_free (cached_reg_t, r->regcache);
5167 }
5168
5169 static struct notif_event *
5170 remote_notif_stop_alloc_reply (void)
5171 {
5172 struct notif_event *r
5173 = (struct notif_event *) XNEW (struct stop_reply);
5174
5175 r->dtr = stop_reply_dtr;
5176
5177 return r;
5178 }
5179
5180 /* A client of notification Stop. */
5181
5182 struct notif_client notif_client_stop =
5183 {
5184 "Stop",
5185 "vStopped",
5186 remote_notif_stop_parse,
5187 remote_notif_stop_ack,
5188 remote_notif_stop_can_get_pending_events,
5189 remote_notif_stop_alloc_reply,
5190 REMOTE_NOTIF_STOP,
5191 };
5192
5193 /* A parameter to pass data in and out. */
5194
5195 struct queue_iter_param
5196 {
5197 void *input;
5198 struct stop_reply *output;
5199 };
5200
5201 /* Remove stop replies in the queue if its pid is equal to the given
5202 inferior's pid. */
5203
5204 static int
5205 remove_stop_reply_for_inferior (QUEUE (stop_reply_p) *q,
5206 QUEUE_ITER (stop_reply_p) *iter,
5207 stop_reply_p event,
5208 void *data)
5209 {
5210 struct queue_iter_param *param = data;
5211 struct inferior *inf = param->input;
5212
5213 if (ptid_get_pid (event->ptid) == inf->pid)
5214 {
5215 stop_reply_xfree (event);
5216 QUEUE_remove_elem (stop_reply_p, q, iter);
5217 }
5218
5219 return 1;
5220 }
5221
5222 /* Discard all pending stop replies of inferior INF. */
5223
5224 static void
5225 discard_pending_stop_replies (struct inferior *inf)
5226 {
5227 int i;
5228 struct queue_iter_param param;
5229 struct stop_reply *reply;
5230 struct remote_state *rs = get_remote_state ();
5231 struct remote_notif_state *rns = rs->notif_state;
5232
5233 /* This function can be notified when an inferior exists. When the
5234 target is not remote, the notification state is NULL. */
5235 if (rs->remote_desc == NULL)
5236 return;
5237
5238 reply = (struct stop_reply *) rns->pending_event[notif_client_stop.id];
5239
5240 /* Discard the in-flight notification. */
5241 if (reply != NULL && ptid_get_pid (reply->ptid) == inf->pid)
5242 {
5243 stop_reply_xfree (reply);
5244 rns->pending_event[notif_client_stop.id] = NULL;
5245 }
5246
5247 param.input = inf;
5248 param.output = NULL;
5249 /* Discard the stop replies we have already pulled with
5250 vStopped. */
5251 QUEUE_iterate (stop_reply_p, stop_reply_queue,
5252 remove_stop_reply_for_inferior, &param);
5253 }
5254
5255 /* If its remote state is equal to the given remote state,
5256 remove EVENT from the stop reply queue. */
5257
5258 static int
5259 remove_stop_reply_of_remote_state (QUEUE (stop_reply_p) *q,
5260 QUEUE_ITER (stop_reply_p) *iter,
5261 stop_reply_p event,
5262 void *data)
5263 {
5264 struct queue_iter_param *param = data;
5265 struct remote_state *rs = param->input;
5266
5267 if (event->rs == rs)
5268 {
5269 stop_reply_xfree (event);
5270 QUEUE_remove_elem (stop_reply_p, q, iter);
5271 }
5272
5273 return 1;
5274 }
5275
5276 /* Discard the stop replies for RS in stop_reply_queue. */
5277
5278 static void
5279 discard_pending_stop_replies_in_queue (struct remote_state *rs)
5280 {
5281 struct queue_iter_param param;
5282
5283 param.input = rs;
5284 param.output = NULL;
5285 /* Discard the stop replies we have already pulled with
5286 vStopped. */
5287 QUEUE_iterate (stop_reply_p, stop_reply_queue,
5288 remove_stop_reply_of_remote_state, &param);
5289 }
5290
5291 /* A parameter to pass data in and out. */
5292
5293 static int
5294 remote_notif_remove_once_on_match (QUEUE (stop_reply_p) *q,
5295 QUEUE_ITER (stop_reply_p) *iter,
5296 stop_reply_p event,
5297 void *data)
5298 {
5299 struct queue_iter_param *param = data;
5300 ptid_t *ptid = param->input;
5301
5302 if (ptid_match (event->ptid, *ptid))
5303 {
5304 param->output = event;
5305 QUEUE_remove_elem (stop_reply_p, q, iter);
5306 return 0;
5307 }
5308
5309 return 1;
5310 }
5311
5312 /* Remove the first reply in 'stop_reply_queue' which matches
5313 PTID. */
5314
5315 static struct stop_reply *
5316 remote_notif_remove_queued_reply (ptid_t ptid)
5317 {
5318 struct queue_iter_param param;
5319
5320 param.input = &ptid;
5321 param.output = NULL;
5322
5323 QUEUE_iterate (stop_reply_p, stop_reply_queue,
5324 remote_notif_remove_once_on_match, &param);
5325 if (notif_debug)
5326 fprintf_unfiltered (gdb_stdlog,
5327 "notif: discard queued event: 'Stop' in %s\n",
5328 target_pid_to_str (ptid));
5329
5330 return param.output;
5331 }
5332
5333 /* Look for a queued stop reply belonging to PTID. If one is found,
5334 remove it from the queue, and return it. Returns NULL if none is
5335 found. If there are still queued events left to process, tell the
5336 event loop to get back to target_wait soon. */
5337
5338 static struct stop_reply *
5339 queued_stop_reply (ptid_t ptid)
5340 {
5341 struct stop_reply *r = remote_notif_remove_queued_reply (ptid);
5342
5343 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
5344 /* There's still at least an event left. */
5345 mark_async_event_handler (remote_async_inferior_event_token);
5346
5347 return r;
5348 }
5349
5350 /* Push a fully parsed stop reply in the stop reply queue. Since we
5351 know that we now have at least one queued event left to pass to the
5352 core side, tell the event loop to get back to target_wait soon. */
5353
5354 static void
5355 push_stop_reply (struct stop_reply *new_event)
5356 {
5357 QUEUE_enque (stop_reply_p, stop_reply_queue, new_event);
5358
5359 if (notif_debug)
5360 fprintf_unfiltered (gdb_stdlog,
5361 "notif: push 'Stop' %s to queue %d\n",
5362 target_pid_to_str (new_event->ptid),
5363 QUEUE_length (stop_reply_p,
5364 stop_reply_queue));
5365
5366 mark_async_event_handler (remote_async_inferior_event_token);
5367 }
5368
5369 static int
5370 stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p) *q,
5371 QUEUE_ITER (stop_reply_p) *iter,
5372 struct stop_reply *event,
5373 void *data)
5374 {
5375 ptid_t *ptid = data;
5376
5377 return !(ptid_equal (*ptid, event->ptid)
5378 && event->ws.kind == TARGET_WAITKIND_STOPPED);
5379 }
5380
5381 /* Returns true if we have a stop reply for PTID. */
5382
5383 static int
5384 peek_stop_reply (ptid_t ptid)
5385 {
5386 return !QUEUE_iterate (stop_reply_p, stop_reply_queue,
5387 stop_reply_match_ptid_and_ws, &ptid);
5388 }
5389
5390 /* Parse the stop reply in BUF. Either the function succeeds, and the
5391 result is stored in EVENT, or throws an error. */
5392
5393 static void
5394 remote_parse_stop_reply (char *buf, struct stop_reply *event)
5395 {
5396 struct remote_arch_state *rsa = get_remote_arch_state ();
5397 ULONGEST addr;
5398 char *p;
5399
5400 event->ptid = null_ptid;
5401 event->rs = get_remote_state ();
5402 event->ws.kind = TARGET_WAITKIND_IGNORE;
5403 event->ws.value.integer = 0;
5404 event->stopped_by_watchpoint_p = 0;
5405 event->regcache = NULL;
5406 event->core = -1;
5407
5408 switch (buf[0])
5409 {
5410 case 'T': /* Status with PC, SP, FP, ... */
5411 /* Expedited reply, containing Signal, {regno, reg} repeat. */
5412 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
5413 ss = signal number
5414 n... = register number
5415 r... = register contents
5416 */
5417
5418 p = &buf[3]; /* after Txx */
5419 while (*p)
5420 {
5421 char *p1;
5422 char *p_temp;
5423 int fieldsize;
5424 LONGEST pnum = 0;
5425
5426 /* If the packet contains a register number, save it in
5427 pnum and set p1 to point to the character following it.
5428 Otherwise p1 points to p. */
5429
5430 /* If this packet is an awatch packet, don't parse the 'a'
5431 as a register number. */
5432
5433 if (strncmp (p, "awatch", strlen("awatch")) != 0
5434 && strncmp (p, "core", strlen ("core") != 0))
5435 {
5436 /* Read the ``P'' register number. */
5437 pnum = strtol (p, &p_temp, 16);
5438 p1 = p_temp;
5439 }
5440 else
5441 p1 = p;
5442
5443 if (p1 == p) /* No register number present here. */
5444 {
5445 p1 = strchr (p, ':');
5446 if (p1 == NULL)
5447 error (_("Malformed packet(a) (missing colon): %s\n\
5448 Packet: '%s'\n"),
5449 p, buf);
5450 if (strncmp (p, "thread", p1 - p) == 0)
5451 event->ptid = read_ptid (++p1, &p);
5452 else if ((strncmp (p, "watch", p1 - p) == 0)
5453 || (strncmp (p, "rwatch", p1 - p) == 0)
5454 || (strncmp (p, "awatch", p1 - p) == 0))
5455 {
5456 event->stopped_by_watchpoint_p = 1;
5457 p = unpack_varlen_hex (++p1, &addr);
5458 event->watch_data_address = (CORE_ADDR) addr;
5459 }
5460 else if (strncmp (p, "library", p1 - p) == 0)
5461 {
5462 p1++;
5463 p_temp = p1;
5464 while (*p_temp && *p_temp != ';')
5465 p_temp++;
5466
5467 event->ws.kind = TARGET_WAITKIND_LOADED;
5468 p = p_temp;
5469 }
5470 else if (strncmp (p, "replaylog", p1 - p) == 0)
5471 {
5472 event->ws.kind = TARGET_WAITKIND_NO_HISTORY;
5473 /* p1 will indicate "begin" or "end", but it makes
5474 no difference for now, so ignore it. */
5475 p_temp = strchr (p1 + 1, ';');
5476 if (p_temp)
5477 p = p_temp;
5478 }
5479 else if (strncmp (p, "core", p1 - p) == 0)
5480 {
5481 ULONGEST c;
5482
5483 p = unpack_varlen_hex (++p1, &c);
5484 event->core = c;
5485 }
5486 else
5487 {
5488 /* Silently skip unknown optional info. */
5489 p_temp = strchr (p1 + 1, ';');
5490 if (p_temp)
5491 p = p_temp;
5492 }
5493 }
5494 else
5495 {
5496 struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum);
5497 cached_reg_t cached_reg;
5498
5499 p = p1;
5500
5501 if (*p != ':')
5502 error (_("Malformed packet(b) (missing colon): %s\n\
5503 Packet: '%s'\n"),
5504 p, buf);
5505 ++p;
5506
5507 if (reg == NULL)
5508 error (_("Remote sent bad register number %s: %s\n\
5509 Packet: '%s'\n"),
5510 hex_string (pnum), p, buf);
5511
5512 cached_reg.num = reg->regnum;
5513
5514 fieldsize = hex2bin (p, cached_reg.data,
5515 register_size (target_gdbarch (),
5516 reg->regnum));
5517 p += 2 * fieldsize;
5518 if (fieldsize < register_size (target_gdbarch (),
5519 reg->regnum))
5520 warning (_("Remote reply is too short: %s"), buf);
5521
5522 VEC_safe_push (cached_reg_t, event->regcache, &cached_reg);
5523 }
5524
5525 if (*p != ';')
5526 error (_("Remote register badly formatted: %s\nhere: %s"),
5527 buf, p);
5528 ++p;
5529 }
5530
5531 if (event->ws.kind != TARGET_WAITKIND_IGNORE)
5532 break;
5533
5534 /* fall through */
5535 case 'S': /* Old style status, just signal only. */
5536 {
5537 int sig;
5538
5539 event->ws.kind = TARGET_WAITKIND_STOPPED;
5540 sig = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
5541 if (GDB_SIGNAL_FIRST <= sig && sig < GDB_SIGNAL_LAST)
5542 event->ws.value.sig = (enum gdb_signal) sig;
5543 else
5544 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
5545 }
5546 break;
5547 case 'W': /* Target exited. */
5548 case 'X':
5549 {
5550 char *p;
5551 int pid;
5552 ULONGEST value;
5553
5554 /* GDB used to accept only 2 hex chars here. Stubs should
5555 only send more if they detect GDB supports multi-process
5556 support. */
5557 p = unpack_varlen_hex (&buf[1], &value);
5558
5559 if (buf[0] == 'W')
5560 {
5561 /* The remote process exited. */
5562 event->ws.kind = TARGET_WAITKIND_EXITED;
5563 event->ws.value.integer = value;
5564 }
5565 else
5566 {
5567 /* The remote process exited with a signal. */
5568 event->ws.kind = TARGET_WAITKIND_SIGNALLED;
5569 if (GDB_SIGNAL_FIRST <= value && value < GDB_SIGNAL_LAST)
5570 event->ws.value.sig = (enum gdb_signal) value;
5571 else
5572 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
5573 }
5574
5575 /* If no process is specified, assume inferior_ptid. */
5576 pid = ptid_get_pid (inferior_ptid);
5577 if (*p == '\0')
5578 ;
5579 else if (*p == ';')
5580 {
5581 p++;
5582
5583 if (p == '\0')
5584 ;
5585 else if (strncmp (p,
5586 "process:", sizeof ("process:") - 1) == 0)
5587 {
5588 ULONGEST upid;
5589
5590 p += sizeof ("process:") - 1;
5591 unpack_varlen_hex (p, &upid);
5592 pid = upid;
5593 }
5594 else
5595 error (_("unknown stop reply packet: %s"), buf);
5596 }
5597 else
5598 error (_("unknown stop reply packet: %s"), buf);
5599 event->ptid = pid_to_ptid (pid);
5600 }
5601 break;
5602 }
5603
5604 if (non_stop && ptid_equal (event->ptid, null_ptid))
5605 error (_("No process or thread specified in stop reply: %s"), buf);
5606 }
5607
5608 /* When the stub wants to tell GDB about a new notification reply, it
5609 sends a notification (%Stop, for example). Those can come it at
5610 any time, hence, we have to make sure that any pending
5611 putpkt/getpkt sequence we're making is finished, before querying
5612 the stub for more events with the corresponding ack command
5613 (vStopped, for example). E.g., if we started a vStopped sequence
5614 immediately upon receiving the notification, something like this
5615 could happen:
5616
5617 1.1) --> Hg 1
5618 1.2) <-- OK
5619 1.3) --> g
5620 1.4) <-- %Stop
5621 1.5) --> vStopped
5622 1.6) <-- (registers reply to step #1.3)
5623
5624 Obviously, the reply in step #1.6 would be unexpected to a vStopped
5625 query.
5626
5627 To solve this, whenever we parse a %Stop notification successfully,
5628 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
5629 doing whatever we were doing:
5630
5631 2.1) --> Hg 1
5632 2.2) <-- OK
5633 2.3) --> g
5634 2.4) <-- %Stop
5635 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
5636 2.5) <-- (registers reply to step #2.3)
5637
5638 Eventualy after step #2.5, we return to the event loop, which
5639 notices there's an event on the
5640 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
5641 associated callback --- the function below. At this point, we're
5642 always safe to start a vStopped sequence. :
5643
5644 2.6) --> vStopped
5645 2.7) <-- T05 thread:2
5646 2.8) --> vStopped
5647 2.9) --> OK
5648 */
5649
5650 void
5651 remote_notif_get_pending_events (struct notif_client *nc)
5652 {
5653 struct remote_state *rs = get_remote_state ();
5654
5655 if (rs->notif_state->pending_event[nc->id] != NULL)
5656 {
5657 if (notif_debug)
5658 fprintf_unfiltered (gdb_stdlog,
5659 "notif: process: '%s' ack pending event\n",
5660 nc->name);
5661
5662 /* acknowledge */
5663 nc->ack (nc, rs->buf, rs->notif_state->pending_event[nc->id]);
5664 rs->notif_state->pending_event[nc->id] = NULL;
5665
5666 while (1)
5667 {
5668 getpkt (&rs->buf, &rs->buf_size, 0);
5669 if (strcmp (rs->buf, "OK") == 0)
5670 break;
5671 else
5672 remote_notif_ack (nc, rs->buf);
5673 }
5674 }
5675 else
5676 {
5677 if (notif_debug)
5678 fprintf_unfiltered (gdb_stdlog,
5679 "notif: process: '%s' no pending reply\n",
5680 nc->name);
5681 }
5682 }
5683
5684 /* Called when it is decided that STOP_REPLY holds the info of the
5685 event that is to be returned to the core. This function always
5686 destroys STOP_REPLY. */
5687
5688 static ptid_t
5689 process_stop_reply (struct stop_reply *stop_reply,
5690 struct target_waitstatus *status)
5691 {
5692 ptid_t ptid;
5693
5694 *status = stop_reply->ws;
5695 ptid = stop_reply->ptid;
5696
5697 /* If no thread/process was reported by the stub, assume the current
5698 inferior. */
5699 if (ptid_equal (ptid, null_ptid))
5700 ptid = inferior_ptid;
5701
5702 if (status->kind != TARGET_WAITKIND_EXITED
5703 && status->kind != TARGET_WAITKIND_SIGNALLED)
5704 {
5705 struct remote_state *rs = get_remote_state ();
5706
5707 /* Expedited registers. */
5708 if (stop_reply->regcache)
5709 {
5710 struct regcache *regcache
5711 = get_thread_arch_regcache (ptid, target_gdbarch ());
5712 cached_reg_t *reg;
5713 int ix;
5714
5715 for (ix = 0;
5716 VEC_iterate(cached_reg_t, stop_reply->regcache, ix, reg);
5717 ix++)
5718 regcache_raw_supply (regcache, reg->num, reg->data);
5719 VEC_free (cached_reg_t, stop_reply->regcache);
5720 }
5721
5722 rs->remote_stopped_by_watchpoint_p = stop_reply->stopped_by_watchpoint_p;
5723 rs->remote_watch_data_address = stop_reply->watch_data_address;
5724
5725 remote_notice_new_inferior (ptid, 0);
5726 demand_private_info (ptid)->core = stop_reply->core;
5727 }
5728
5729 stop_reply_xfree (stop_reply);
5730 return ptid;
5731 }
5732
5733 /* The non-stop mode version of target_wait. */
5734
5735 static ptid_t
5736 remote_wait_ns (ptid_t ptid, struct target_waitstatus *status, int options)
5737 {
5738 struct remote_state *rs = get_remote_state ();
5739 struct stop_reply *stop_reply;
5740 int ret;
5741 int is_notif = 0;
5742
5743 /* If in non-stop mode, get out of getpkt even if a
5744 notification is received. */
5745
5746 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
5747 0 /* forever */, &is_notif);
5748 while (1)
5749 {
5750 if (ret != -1 && !is_notif)
5751 switch (rs->buf[0])
5752 {
5753 case 'E': /* Error of some sort. */
5754 /* We're out of sync with the target now. Did it continue
5755 or not? We can't tell which thread it was in non-stop,
5756 so just ignore this. */
5757 warning (_("Remote failure reply: %s"), rs->buf);
5758 break;
5759 case 'O': /* Console output. */
5760 remote_console_output (rs->buf + 1);
5761 break;
5762 default:
5763 warning (_("Invalid remote reply: %s"), rs->buf);
5764 break;
5765 }
5766
5767 /* Acknowledge a pending stop reply that may have arrived in the
5768 mean time. */
5769 if (rs->notif_state->pending_event[notif_client_stop.id] != NULL)
5770 remote_notif_get_pending_events (&notif_client_stop);
5771
5772 /* If indeed we noticed a stop reply, we're done. */
5773 stop_reply = queued_stop_reply (ptid);
5774 if (stop_reply != NULL)
5775 return process_stop_reply (stop_reply, status);
5776
5777 /* Still no event. If we're just polling for an event, then
5778 return to the event loop. */
5779 if (options & TARGET_WNOHANG)
5780 {
5781 status->kind = TARGET_WAITKIND_IGNORE;
5782 return minus_one_ptid;
5783 }
5784
5785 /* Otherwise do a blocking wait. */
5786 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
5787 1 /* forever */, &is_notif);
5788 }
5789 }
5790
5791 /* Wait until the remote machine stops, then return, storing status in
5792 STATUS just as `wait' would. */
5793
5794 static ptid_t
5795 remote_wait_as (ptid_t ptid, struct target_waitstatus *status, int options)
5796 {
5797 struct remote_state *rs = get_remote_state ();
5798 ptid_t event_ptid = null_ptid;
5799 char *buf;
5800 struct stop_reply *stop_reply;
5801
5802 again:
5803
5804 status->kind = TARGET_WAITKIND_IGNORE;
5805 status->value.integer = 0;
5806
5807 stop_reply = queued_stop_reply (ptid);
5808 if (stop_reply != NULL)
5809 return process_stop_reply (stop_reply, status);
5810
5811 if (rs->cached_wait_status)
5812 /* Use the cached wait status, but only once. */
5813 rs->cached_wait_status = 0;
5814 else
5815 {
5816 int ret;
5817 int is_notif;
5818
5819 if (!target_is_async_p ())
5820 {
5821 ofunc = signal (SIGINT, sync_remote_interrupt);
5822 /* If the user hit C-c before this packet, or between packets,
5823 pretend that it was hit right here. */
5824 if (check_quit_flag ())
5825 {
5826 clear_quit_flag ();
5827 sync_remote_interrupt (SIGINT);
5828 }
5829 }
5830
5831 /* FIXME: cagney/1999-09-27: If we're in async mode we should
5832 _never_ wait for ever -> test on target_is_async_p().
5833 However, before we do that we need to ensure that the caller
5834 knows how to take the target into/out of async mode. */
5835 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
5836 wait_forever_enabled_p, &is_notif);
5837
5838 if (!target_is_async_p ())
5839 signal (SIGINT, ofunc);
5840
5841 /* GDB gets a notification. Return to core as this event is
5842 not interesting. */
5843 if (ret != -1 && is_notif)
5844 return minus_one_ptid;
5845 }
5846
5847 buf = rs->buf;
5848
5849 rs->remote_stopped_by_watchpoint_p = 0;
5850
5851 /* We got something. */
5852 rs->waiting_for_stop_reply = 0;
5853
5854 /* Assume that the target has acknowledged Ctrl-C unless we receive
5855 an 'F' or 'O' packet. */
5856 if (buf[0] != 'F' && buf[0] != 'O')
5857 rs->ctrlc_pending_p = 0;
5858
5859 switch (buf[0])
5860 {
5861 case 'E': /* Error of some sort. */
5862 /* We're out of sync with the target now. Did it continue or
5863 not? Not is more likely, so report a stop. */
5864 warning (_("Remote failure reply: %s"), buf);
5865 status->kind = TARGET_WAITKIND_STOPPED;
5866 status->value.sig = GDB_SIGNAL_0;
5867 break;
5868 case 'F': /* File-I/O request. */
5869 remote_fileio_request (buf, rs->ctrlc_pending_p);
5870 rs->ctrlc_pending_p = 0;
5871 break;
5872 case 'T': case 'S': case 'X': case 'W':
5873 {
5874 struct stop_reply *stop_reply
5875 = (struct stop_reply *) remote_notif_parse (&notif_client_stop,
5876 rs->buf);
5877
5878 event_ptid = process_stop_reply (stop_reply, status);
5879 break;
5880 }
5881 case 'O': /* Console output. */
5882 remote_console_output (buf + 1);
5883
5884 /* The target didn't really stop; keep waiting. */
5885 rs->waiting_for_stop_reply = 1;
5886
5887 break;
5888 case '\0':
5889 if (rs->last_sent_signal != GDB_SIGNAL_0)
5890 {
5891 /* Zero length reply means that we tried 'S' or 'C' and the
5892 remote system doesn't support it. */
5893 target_terminal_ours_for_output ();
5894 printf_filtered
5895 ("Can't send signals to this remote system. %s not sent.\n",
5896 gdb_signal_to_name (rs->last_sent_signal));
5897 rs->last_sent_signal = GDB_SIGNAL_0;
5898 target_terminal_inferior ();
5899
5900 strcpy ((char *) buf, rs->last_sent_step ? "s" : "c");
5901 putpkt ((char *) buf);
5902
5903 /* We just told the target to resume, so a stop reply is in
5904 order. */
5905 rs->waiting_for_stop_reply = 1;
5906 break;
5907 }
5908 /* else fallthrough */
5909 default:
5910 warning (_("Invalid remote reply: %s"), buf);
5911 /* Keep waiting. */
5912 rs->waiting_for_stop_reply = 1;
5913 break;
5914 }
5915
5916 if (status->kind == TARGET_WAITKIND_IGNORE)
5917 {
5918 /* Nothing interesting happened. If we're doing a non-blocking
5919 poll, we're done. Otherwise, go back to waiting. */
5920 if (options & TARGET_WNOHANG)
5921 return minus_one_ptid;
5922 else
5923 goto again;
5924 }
5925 else if (status->kind != TARGET_WAITKIND_EXITED
5926 && status->kind != TARGET_WAITKIND_SIGNALLED)
5927 {
5928 if (!ptid_equal (event_ptid, null_ptid))
5929 record_currthread (rs, event_ptid);
5930 else
5931 event_ptid = inferior_ptid;
5932 }
5933 else
5934 /* A process exit. Invalidate our notion of current thread. */
5935 record_currthread (rs, minus_one_ptid);
5936
5937 return event_ptid;
5938 }
5939
5940 /* Wait until the remote machine stops, then return, storing status in
5941 STATUS just as `wait' would. */
5942
5943 static ptid_t
5944 remote_wait (struct target_ops *ops,
5945 ptid_t ptid, struct target_waitstatus *status, int options)
5946 {
5947 ptid_t event_ptid;
5948
5949 if (non_stop)
5950 event_ptid = remote_wait_ns (ptid, status, options);
5951 else
5952 event_ptid = remote_wait_as (ptid, status, options);
5953
5954 if (target_can_async_p ())
5955 {
5956 /* If there are are events left in the queue tell the event loop
5957 to return here. */
5958 if (!QUEUE_is_empty (stop_reply_p, stop_reply_queue))
5959 mark_async_event_handler (remote_async_inferior_event_token);
5960 }
5961
5962 return event_ptid;
5963 }
5964
5965 /* Fetch a single register using a 'p' packet. */
5966
5967 static int
5968 fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg)
5969 {
5970 struct remote_state *rs = get_remote_state ();
5971 char *buf, *p;
5972 char regp[MAX_REGISTER_SIZE];
5973 int i;
5974
5975 if (packet_support (PACKET_p) == PACKET_DISABLE)
5976 return 0;
5977
5978 if (reg->pnum == -1)
5979 return 0;
5980
5981 p = rs->buf;
5982 *p++ = 'p';
5983 p += hexnumstr (p, reg->pnum);
5984 *p++ = '\0';
5985 putpkt (rs->buf);
5986 getpkt (&rs->buf, &rs->buf_size, 0);
5987
5988 buf = rs->buf;
5989
5990 switch (packet_ok (buf, &remote_protocol_packets[PACKET_p]))
5991 {
5992 case PACKET_OK:
5993 break;
5994 case PACKET_UNKNOWN:
5995 return 0;
5996 case PACKET_ERROR:
5997 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
5998 gdbarch_register_name (get_regcache_arch (regcache),
5999 reg->regnum),
6000 buf);
6001 }
6002
6003 /* If this register is unfetchable, tell the regcache. */
6004 if (buf[0] == 'x')
6005 {
6006 regcache_raw_supply (regcache, reg->regnum, NULL);
6007 return 1;
6008 }
6009
6010 /* Otherwise, parse and supply the value. */
6011 p = buf;
6012 i = 0;
6013 while (p[0] != 0)
6014 {
6015 if (p[1] == 0)
6016 error (_("fetch_register_using_p: early buf termination"));
6017
6018 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
6019 p += 2;
6020 }
6021 regcache_raw_supply (regcache, reg->regnum, regp);
6022 return 1;
6023 }
6024
6025 /* Fetch the registers included in the target's 'g' packet. */
6026
6027 static int
6028 send_g_packet (void)
6029 {
6030 struct remote_state *rs = get_remote_state ();
6031 int buf_len;
6032
6033 xsnprintf (rs->buf, get_remote_packet_size (), "g");
6034 remote_send (&rs->buf, &rs->buf_size);
6035
6036 /* We can get out of synch in various cases. If the first character
6037 in the buffer is not a hex character, assume that has happened
6038 and try to fetch another packet to read. */
6039 while ((rs->buf[0] < '0' || rs->buf[0] > '9')
6040 && (rs->buf[0] < 'A' || rs->buf[0] > 'F')
6041 && (rs->buf[0] < 'a' || rs->buf[0] > 'f')
6042 && rs->buf[0] != 'x') /* New: unavailable register value. */
6043 {
6044 if (remote_debug)
6045 fprintf_unfiltered (gdb_stdlog,
6046 "Bad register packet; fetching a new packet\n");
6047 getpkt (&rs->buf, &rs->buf_size, 0);
6048 }
6049
6050 buf_len = strlen (rs->buf);
6051
6052 /* Sanity check the received packet. */
6053 if (buf_len % 2 != 0)
6054 error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf);
6055
6056 return buf_len / 2;
6057 }
6058
6059 static void
6060 process_g_packet (struct regcache *regcache)
6061 {
6062 struct gdbarch *gdbarch = get_regcache_arch (regcache);
6063 struct remote_state *rs = get_remote_state ();
6064 struct remote_arch_state *rsa = get_remote_arch_state ();
6065 int i, buf_len;
6066 char *p;
6067 char *regs;
6068
6069 buf_len = strlen (rs->buf);
6070
6071 /* Further sanity checks, with knowledge of the architecture. */
6072 if (buf_len > 2 * rsa->sizeof_g_packet)
6073 error (_("Remote 'g' packet reply is too long: %s"), rs->buf);
6074
6075 /* Save the size of the packet sent to us by the target. It is used
6076 as a heuristic when determining the max size of packets that the
6077 target can safely receive. */
6078 if (rsa->actual_register_packet_size == 0)
6079 rsa->actual_register_packet_size = buf_len;
6080
6081 /* If this is smaller than we guessed the 'g' packet would be,
6082 update our records. A 'g' reply that doesn't include a register's
6083 value implies either that the register is not available, or that
6084 the 'p' packet must be used. */
6085 if (buf_len < 2 * rsa->sizeof_g_packet)
6086 {
6087 rsa->sizeof_g_packet = buf_len / 2;
6088
6089 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
6090 {
6091 if (rsa->regs[i].pnum == -1)
6092 continue;
6093
6094 if (rsa->regs[i].offset >= rsa->sizeof_g_packet)
6095 rsa->regs[i].in_g_packet = 0;
6096 else
6097 rsa->regs[i].in_g_packet = 1;
6098 }
6099 }
6100
6101 regs = alloca (rsa->sizeof_g_packet);
6102
6103 /* Unimplemented registers read as all bits zero. */
6104 memset (regs, 0, rsa->sizeof_g_packet);
6105
6106 /* Reply describes registers byte by byte, each byte encoded as two
6107 hex characters. Suck them all up, then supply them to the
6108 register cacheing/storage mechanism. */
6109
6110 p = rs->buf;
6111 for (i = 0; i < rsa->sizeof_g_packet; i++)
6112 {
6113 if (p[0] == 0 || p[1] == 0)
6114 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
6115 internal_error (__FILE__, __LINE__,
6116 _("unexpected end of 'g' packet reply"));
6117
6118 if (p[0] == 'x' && p[1] == 'x')
6119 regs[i] = 0; /* 'x' */
6120 else
6121 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
6122 p += 2;
6123 }
6124
6125 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
6126 {
6127 struct packet_reg *r = &rsa->regs[i];
6128
6129 if (r->in_g_packet)
6130 {
6131 if (r->offset * 2 >= strlen (rs->buf))
6132 /* This shouldn't happen - we adjusted in_g_packet above. */
6133 internal_error (__FILE__, __LINE__,
6134 _("unexpected end of 'g' packet reply"));
6135 else if (rs->buf[r->offset * 2] == 'x')
6136 {
6137 gdb_assert (r->offset * 2 < strlen (rs->buf));
6138 /* The register isn't available, mark it as such (at
6139 the same time setting the value to zero). */
6140 regcache_raw_supply (regcache, r->regnum, NULL);
6141 }
6142 else
6143 regcache_raw_supply (regcache, r->regnum,
6144 regs + r->offset);
6145 }
6146 }
6147 }
6148
6149 static void
6150 fetch_registers_using_g (struct regcache *regcache)
6151 {
6152 send_g_packet ();
6153 process_g_packet (regcache);
6154 }
6155
6156 /* Make the remote selected traceframe match GDB's selected
6157 traceframe. */
6158
6159 static void
6160 set_remote_traceframe (void)
6161 {
6162 int newnum;
6163 struct remote_state *rs = get_remote_state ();
6164
6165 if (rs->remote_traceframe_number == get_traceframe_number ())
6166 return;
6167
6168 /* Avoid recursion, remote_trace_find calls us again. */
6169 rs->remote_traceframe_number = get_traceframe_number ();
6170
6171 newnum = target_trace_find (tfind_number,
6172 get_traceframe_number (), 0, 0, NULL);
6173
6174 /* Should not happen. If it does, all bets are off. */
6175 if (newnum != get_traceframe_number ())
6176 warning (_("could not set remote traceframe"));
6177 }
6178
6179 static void
6180 remote_fetch_registers (struct target_ops *ops,
6181 struct regcache *regcache, int regnum)
6182 {
6183 struct remote_arch_state *rsa = get_remote_arch_state ();
6184 int i;
6185
6186 set_remote_traceframe ();
6187 set_general_thread (inferior_ptid);
6188
6189 if (regnum >= 0)
6190 {
6191 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
6192
6193 gdb_assert (reg != NULL);
6194
6195 /* If this register might be in the 'g' packet, try that first -
6196 we are likely to read more than one register. If this is the
6197 first 'g' packet, we might be overly optimistic about its
6198 contents, so fall back to 'p'. */
6199 if (reg->in_g_packet)
6200 {
6201 fetch_registers_using_g (regcache);
6202 if (reg->in_g_packet)
6203 return;
6204 }
6205
6206 if (fetch_register_using_p (regcache, reg))
6207 return;
6208
6209 /* This register is not available. */
6210 regcache_raw_supply (regcache, reg->regnum, NULL);
6211
6212 return;
6213 }
6214
6215 fetch_registers_using_g (regcache);
6216
6217 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
6218 if (!rsa->regs[i].in_g_packet)
6219 if (!fetch_register_using_p (regcache, &rsa->regs[i]))
6220 {
6221 /* This register is not available. */
6222 regcache_raw_supply (regcache, i, NULL);
6223 }
6224 }
6225
6226 /* Prepare to store registers. Since we may send them all (using a
6227 'G' request), we have to read out the ones we don't want to change
6228 first. */
6229
6230 static void
6231 remote_prepare_to_store (struct target_ops *self, struct regcache *regcache)
6232 {
6233 struct remote_arch_state *rsa = get_remote_arch_state ();
6234 int i;
6235 gdb_byte buf[MAX_REGISTER_SIZE];
6236
6237 /* Make sure the entire registers array is valid. */
6238 switch (packet_support (PACKET_P))
6239 {
6240 case PACKET_DISABLE:
6241 case PACKET_SUPPORT_UNKNOWN:
6242 /* Make sure all the necessary registers are cached. */
6243 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
6244 if (rsa->regs[i].in_g_packet)
6245 regcache_raw_read (regcache, rsa->regs[i].regnum, buf);
6246 break;
6247 case PACKET_ENABLE:
6248 break;
6249 }
6250 }
6251
6252 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
6253 packet was not recognized. */
6254
6255 static int
6256 store_register_using_P (const struct regcache *regcache,
6257 struct packet_reg *reg)
6258 {
6259 struct gdbarch *gdbarch = get_regcache_arch (regcache);
6260 struct remote_state *rs = get_remote_state ();
6261 /* Try storing a single register. */
6262 char *buf = rs->buf;
6263 gdb_byte regp[MAX_REGISTER_SIZE];
6264 char *p;
6265
6266 if (packet_support (PACKET_P) == PACKET_DISABLE)
6267 return 0;
6268
6269 if (reg->pnum == -1)
6270 return 0;
6271
6272 xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0));
6273 p = buf + strlen (buf);
6274 regcache_raw_collect (regcache, reg->regnum, regp);
6275 bin2hex (regp, p, register_size (gdbarch, reg->regnum));
6276 putpkt (rs->buf);
6277 getpkt (&rs->buf, &rs->buf_size, 0);
6278
6279 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P]))
6280 {
6281 case PACKET_OK:
6282 return 1;
6283 case PACKET_ERROR:
6284 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
6285 gdbarch_register_name (gdbarch, reg->regnum), rs->buf);
6286 case PACKET_UNKNOWN:
6287 return 0;
6288 default:
6289 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
6290 }
6291 }
6292
6293 /* Store register REGNUM, or all registers if REGNUM == -1, from the
6294 contents of the register cache buffer. FIXME: ignores errors. */
6295
6296 static void
6297 store_registers_using_G (const struct regcache *regcache)
6298 {
6299 struct remote_state *rs = get_remote_state ();
6300 struct remote_arch_state *rsa = get_remote_arch_state ();
6301 gdb_byte *regs;
6302 char *p;
6303
6304 /* Extract all the registers in the regcache copying them into a
6305 local buffer. */
6306 {
6307 int i;
6308
6309 regs = alloca (rsa->sizeof_g_packet);
6310 memset (regs, 0, rsa->sizeof_g_packet);
6311 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
6312 {
6313 struct packet_reg *r = &rsa->regs[i];
6314
6315 if (r->in_g_packet)
6316 regcache_raw_collect (regcache, r->regnum, regs + r->offset);
6317 }
6318 }
6319
6320 /* Command describes registers byte by byte,
6321 each byte encoded as two hex characters. */
6322 p = rs->buf;
6323 *p++ = 'G';
6324 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
6325 updated. */
6326 bin2hex (regs, p, rsa->sizeof_g_packet);
6327 putpkt (rs->buf);
6328 getpkt (&rs->buf, &rs->buf_size, 0);
6329 if (packet_check_result (rs->buf) == PACKET_ERROR)
6330 error (_("Could not write registers; remote failure reply '%s'"),
6331 rs->buf);
6332 }
6333
6334 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
6335 of the register cache buffer. FIXME: ignores errors. */
6336
6337 static void
6338 remote_store_registers (struct target_ops *ops,
6339 struct regcache *regcache, int regnum)
6340 {
6341 struct remote_arch_state *rsa = get_remote_arch_state ();
6342 int i;
6343
6344 set_remote_traceframe ();
6345 set_general_thread (inferior_ptid);
6346
6347 if (regnum >= 0)
6348 {
6349 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
6350
6351 gdb_assert (reg != NULL);
6352
6353 /* Always prefer to store registers using the 'P' packet if
6354 possible; we often change only a small number of registers.
6355 Sometimes we change a larger number; we'd need help from a
6356 higher layer to know to use 'G'. */
6357 if (store_register_using_P (regcache, reg))
6358 return;
6359
6360 /* For now, don't complain if we have no way to write the
6361 register. GDB loses track of unavailable registers too
6362 easily. Some day, this may be an error. We don't have
6363 any way to read the register, either... */
6364 if (!reg->in_g_packet)
6365 return;
6366
6367 store_registers_using_G (regcache);
6368 return;
6369 }
6370
6371 store_registers_using_G (regcache);
6372
6373 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
6374 if (!rsa->regs[i].in_g_packet)
6375 if (!store_register_using_P (regcache, &rsa->regs[i]))
6376 /* See above for why we do not issue an error here. */
6377 continue;
6378 }
6379 \f
6380
6381 /* Return the number of hex digits in num. */
6382
6383 static int
6384 hexnumlen (ULONGEST num)
6385 {
6386 int i;
6387
6388 for (i = 0; num != 0; i++)
6389 num >>= 4;
6390
6391 return max (i, 1);
6392 }
6393
6394 /* Set BUF to the minimum number of hex digits representing NUM. */
6395
6396 static int
6397 hexnumstr (char *buf, ULONGEST num)
6398 {
6399 int len = hexnumlen (num);
6400
6401 return hexnumnstr (buf, num, len);
6402 }
6403
6404
6405 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
6406
6407 static int
6408 hexnumnstr (char *buf, ULONGEST num, int width)
6409 {
6410 int i;
6411
6412 buf[width] = '\0';
6413
6414 for (i = width - 1; i >= 0; i--)
6415 {
6416 buf[i] = "0123456789abcdef"[(num & 0xf)];
6417 num >>= 4;
6418 }
6419
6420 return width;
6421 }
6422
6423 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
6424
6425 static CORE_ADDR
6426 remote_address_masked (CORE_ADDR addr)
6427 {
6428 unsigned int address_size = remote_address_size;
6429
6430 /* If "remoteaddresssize" was not set, default to target address size. */
6431 if (!address_size)
6432 address_size = gdbarch_addr_bit (target_gdbarch ());
6433
6434 if (address_size > 0
6435 && address_size < (sizeof (ULONGEST) * 8))
6436 {
6437 /* Only create a mask when that mask can safely be constructed
6438 in a ULONGEST variable. */
6439 ULONGEST mask = 1;
6440
6441 mask = (mask << address_size) - 1;
6442 addr &= mask;
6443 }
6444 return addr;
6445 }
6446
6447 /* Determine whether the remote target supports binary downloading.
6448 This is accomplished by sending a no-op memory write of zero length
6449 to the target at the specified address. It does not suffice to send
6450 the whole packet, since many stubs strip the eighth bit and
6451 subsequently compute a wrong checksum, which causes real havoc with
6452 remote_write_bytes.
6453
6454 NOTE: This can still lose if the serial line is not eight-bit
6455 clean. In cases like this, the user should clear "remote
6456 X-packet". */
6457
6458 static void
6459 check_binary_download (CORE_ADDR addr)
6460 {
6461 struct remote_state *rs = get_remote_state ();
6462
6463 switch (packet_support (PACKET_X))
6464 {
6465 case PACKET_DISABLE:
6466 break;
6467 case PACKET_ENABLE:
6468 break;
6469 case PACKET_SUPPORT_UNKNOWN:
6470 {
6471 char *p;
6472
6473 p = rs->buf;
6474 *p++ = 'X';
6475 p += hexnumstr (p, (ULONGEST) addr);
6476 *p++ = ',';
6477 p += hexnumstr (p, (ULONGEST) 0);
6478 *p++ = ':';
6479 *p = '\0';
6480
6481 putpkt_binary (rs->buf, (int) (p - rs->buf));
6482 getpkt (&rs->buf, &rs->buf_size, 0);
6483
6484 if (rs->buf[0] == '\0')
6485 {
6486 if (remote_debug)
6487 fprintf_unfiltered (gdb_stdlog,
6488 "binary downloading NOT "
6489 "supported by target\n");
6490 remote_protocol_packets[PACKET_X].support = PACKET_DISABLE;
6491 }
6492 else
6493 {
6494 if (remote_debug)
6495 fprintf_unfiltered (gdb_stdlog,
6496 "binary downloading supported by target\n");
6497 remote_protocol_packets[PACKET_X].support = PACKET_ENABLE;
6498 }
6499 break;
6500 }
6501 }
6502 }
6503
6504 /* Write memory data directly to the remote machine.
6505 This does not inform the data cache; the data cache uses this.
6506 HEADER is the starting part of the packet.
6507 MEMADDR is the address in the remote memory space.
6508 MYADDR is the address of the buffer in our space.
6509 LEN is the number of bytes.
6510 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
6511 should send data as binary ('X'), or hex-encoded ('M').
6512
6513 The function creates packet of the form
6514 <HEADER><ADDRESS>,<LENGTH>:<DATA>
6515
6516 where encoding of <DATA> is termined by PACKET_FORMAT.
6517
6518 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
6519 are omitted.
6520
6521 Return the transferred status, error or OK (an
6522 'enum target_xfer_status' value). Save the number of bytes
6523 transferred in *XFERED_LEN. Only transfer a single packet. */
6524
6525 static enum target_xfer_status
6526 remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
6527 const gdb_byte *myaddr, ULONGEST len,
6528 ULONGEST *xfered_len, char packet_format,
6529 int use_length)
6530 {
6531 struct remote_state *rs = get_remote_state ();
6532 char *p;
6533 char *plen = NULL;
6534 int plenlen = 0;
6535 int todo;
6536 int nr_bytes;
6537 int payload_size;
6538 int payload_length;
6539 int header_length;
6540
6541 if (packet_format != 'X' && packet_format != 'M')
6542 internal_error (__FILE__, __LINE__,
6543 _("remote_write_bytes_aux: bad packet format"));
6544
6545 if (len == 0)
6546 return TARGET_XFER_EOF;
6547
6548 payload_size = get_memory_write_packet_size ();
6549
6550 /* The packet buffer will be large enough for the payload;
6551 get_memory_packet_size ensures this. */
6552 rs->buf[0] = '\0';
6553
6554 /* Compute the size of the actual payload by subtracting out the
6555 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
6556
6557 payload_size -= strlen ("$,:#NN");
6558 if (!use_length)
6559 /* The comma won't be used. */
6560 payload_size += 1;
6561 header_length = strlen (header);
6562 payload_size -= header_length;
6563 payload_size -= hexnumlen (memaddr);
6564
6565 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
6566
6567 strcat (rs->buf, header);
6568 p = rs->buf + strlen (header);
6569
6570 /* Compute a best guess of the number of bytes actually transfered. */
6571 if (packet_format == 'X')
6572 {
6573 /* Best guess at number of bytes that will fit. */
6574 todo = min (len, payload_size);
6575 if (use_length)
6576 payload_size -= hexnumlen (todo);
6577 todo = min (todo, payload_size);
6578 }
6579 else
6580 {
6581 /* Num bytes that will fit. */
6582 todo = min (len, payload_size / 2);
6583 if (use_length)
6584 payload_size -= hexnumlen (todo);
6585 todo = min (todo, payload_size / 2);
6586 }
6587
6588 if (todo <= 0)
6589 internal_error (__FILE__, __LINE__,
6590 _("minimum packet size too small to write data"));
6591
6592 /* If we already need another packet, then try to align the end
6593 of this packet to a useful boundary. */
6594 if (todo > 2 * REMOTE_ALIGN_WRITES && todo < len)
6595 todo = ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr;
6596
6597 /* Append "<memaddr>". */
6598 memaddr = remote_address_masked (memaddr);
6599 p += hexnumstr (p, (ULONGEST) memaddr);
6600
6601 if (use_length)
6602 {
6603 /* Append ",". */
6604 *p++ = ',';
6605
6606 /* Append <len>. Retain the location/size of <len>. It may need to
6607 be adjusted once the packet body has been created. */
6608 plen = p;
6609 plenlen = hexnumstr (p, (ULONGEST) todo);
6610 p += plenlen;
6611 }
6612
6613 /* Append ":". */
6614 *p++ = ':';
6615 *p = '\0';
6616
6617 /* Append the packet body. */
6618 if (packet_format == 'X')
6619 {
6620 /* Binary mode. Send target system values byte by byte, in
6621 increasing byte addresses. Only escape certain critical
6622 characters. */
6623 payload_length = remote_escape_output (myaddr, todo, (gdb_byte *) p,
6624 &nr_bytes, payload_size);
6625
6626 /* If not all TODO bytes fit, then we'll need another packet. Make
6627 a second try to keep the end of the packet aligned. Don't do
6628 this if the packet is tiny. */
6629 if (nr_bytes < todo && nr_bytes > 2 * REMOTE_ALIGN_WRITES)
6630 {
6631 int new_nr_bytes;
6632
6633 new_nr_bytes = (((memaddr + nr_bytes) & ~(REMOTE_ALIGN_WRITES - 1))
6634 - memaddr);
6635 if (new_nr_bytes != nr_bytes)
6636 payload_length = remote_escape_output (myaddr, new_nr_bytes,
6637 (gdb_byte *) p, &nr_bytes,
6638 payload_size);
6639 }
6640
6641 p += payload_length;
6642 if (use_length && nr_bytes < todo)
6643 {
6644 /* Escape chars have filled up the buffer prematurely,
6645 and we have actually sent fewer bytes than planned.
6646 Fix-up the length field of the packet. Use the same
6647 number of characters as before. */
6648 plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen);
6649 *plen = ':'; /* overwrite \0 from hexnumnstr() */
6650 }
6651 }
6652 else
6653 {
6654 /* Normal mode: Send target system values byte by byte, in
6655 increasing byte addresses. Each byte is encoded as a two hex
6656 value. */
6657 nr_bytes = bin2hex (myaddr, p, todo);
6658 p += 2 * nr_bytes;
6659 }
6660
6661 putpkt_binary (rs->buf, (int) (p - rs->buf));
6662 getpkt (&rs->buf, &rs->buf_size, 0);
6663
6664 if (rs->buf[0] == 'E')
6665 return TARGET_XFER_E_IO;
6666
6667 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
6668 fewer bytes than we'd planned. */
6669 *xfered_len = (ULONGEST) nr_bytes;
6670 return TARGET_XFER_OK;
6671 }
6672
6673 /* Write memory data directly to the remote machine.
6674 This does not inform the data cache; the data cache uses this.
6675 MEMADDR is the address in the remote memory space.
6676 MYADDR is the address of the buffer in our space.
6677 LEN is the number of bytes.
6678
6679 Return the transferred status, error or OK (an
6680 'enum target_xfer_status' value). Save the number of bytes
6681 transferred in *XFERED_LEN. Only transfer a single packet. */
6682
6683 static enum target_xfer_status
6684 remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, ULONGEST len,
6685 ULONGEST *xfered_len)
6686 {
6687 char *packet_format = 0;
6688
6689 /* Check whether the target supports binary download. */
6690 check_binary_download (memaddr);
6691
6692 switch (packet_support (PACKET_X))
6693 {
6694 case PACKET_ENABLE:
6695 packet_format = "X";
6696 break;
6697 case PACKET_DISABLE:
6698 packet_format = "M";
6699 break;
6700 case PACKET_SUPPORT_UNKNOWN:
6701 internal_error (__FILE__, __LINE__,
6702 _("remote_write_bytes: bad internal state"));
6703 default:
6704 internal_error (__FILE__, __LINE__, _("bad switch"));
6705 }
6706
6707 return remote_write_bytes_aux (packet_format,
6708 memaddr, myaddr, len, xfered_len,
6709 packet_format[0], 1);
6710 }
6711
6712 /* Read memory data directly from the remote machine.
6713 This does not use the data cache; the data cache uses this.
6714 MEMADDR is the address in the remote memory space.
6715 MYADDR is the address of the buffer in our space.
6716 LEN is the number of bytes.
6717
6718 Return the transferred status, error or OK (an
6719 'enum target_xfer_status' value). Save the number of bytes
6720 transferred in *XFERED_LEN. */
6721
6722 static enum target_xfer_status
6723 remote_read_bytes_1 (CORE_ADDR memaddr, gdb_byte *myaddr, ULONGEST len,
6724 ULONGEST *xfered_len)
6725 {
6726 struct remote_state *rs = get_remote_state ();
6727 int max_buf_size; /* Max size of packet output buffer. */
6728 char *p;
6729 int todo;
6730 int i;
6731
6732 max_buf_size = get_memory_read_packet_size ();
6733 /* The packet buffer will be large enough for the payload;
6734 get_memory_packet_size ensures this. */
6735
6736 /* Number if bytes that will fit. */
6737 todo = min (len, max_buf_size / 2);
6738
6739 /* Construct "m"<memaddr>","<len>". */
6740 memaddr = remote_address_masked (memaddr);
6741 p = rs->buf;
6742 *p++ = 'm';
6743 p += hexnumstr (p, (ULONGEST) memaddr);
6744 *p++ = ',';
6745 p += hexnumstr (p, (ULONGEST) todo);
6746 *p = '\0';
6747 putpkt (rs->buf);
6748 getpkt (&rs->buf, &rs->buf_size, 0);
6749 if (rs->buf[0] == 'E'
6750 && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2])
6751 && rs->buf[3] == '\0')
6752 return TARGET_XFER_E_IO;
6753 /* Reply describes memory byte by byte, each byte encoded as two hex
6754 characters. */
6755 p = rs->buf;
6756 i = hex2bin (p, myaddr, todo);
6757 /* Return what we have. Let higher layers handle partial reads. */
6758 *xfered_len = (ULONGEST) i;
6759 return TARGET_XFER_OK;
6760 }
6761
6762 /* Using the set of read-only target sections of remote, read live
6763 read-only memory.
6764
6765 For interface/parameters/return description see target.h,
6766 to_xfer_partial. */
6767
6768 static enum target_xfer_status
6769 remote_xfer_live_readonly_partial (struct target_ops *ops, gdb_byte *readbuf,
6770 ULONGEST memaddr, ULONGEST len,
6771 ULONGEST *xfered_len)
6772 {
6773 struct target_section *secp;
6774 struct target_section_table *table;
6775
6776 secp = target_section_by_addr (ops, memaddr);
6777 if (secp != NULL
6778 && (bfd_get_section_flags (secp->the_bfd_section->owner,
6779 secp->the_bfd_section)
6780 & SEC_READONLY))
6781 {
6782 struct target_section *p;
6783 ULONGEST memend = memaddr + len;
6784
6785 table = target_get_section_table (ops);
6786
6787 for (p = table->sections; p < table->sections_end; p++)
6788 {
6789 if (memaddr >= p->addr)
6790 {
6791 if (memend <= p->endaddr)
6792 {
6793 /* Entire transfer is within this section. */
6794 return remote_read_bytes_1 (memaddr, readbuf, len,
6795 xfered_len);
6796 }
6797 else if (memaddr >= p->endaddr)
6798 {
6799 /* This section ends before the transfer starts. */
6800 continue;
6801 }
6802 else
6803 {
6804 /* This section overlaps the transfer. Just do half. */
6805 len = p->endaddr - memaddr;
6806 return remote_read_bytes_1 (memaddr, readbuf, len,
6807 xfered_len);
6808 }
6809 }
6810 }
6811 }
6812
6813 return TARGET_XFER_EOF;
6814 }
6815
6816 /* Similar to remote_read_bytes_1, but it reads from the remote stub
6817 first if the requested memory is unavailable in traceframe.
6818 Otherwise, fall back to remote_read_bytes_1. */
6819
6820 static enum target_xfer_status
6821 remote_read_bytes (struct target_ops *ops, CORE_ADDR memaddr,
6822 gdb_byte *myaddr, ULONGEST len, ULONGEST *xfered_len)
6823 {
6824 if (len == 0)
6825 return TARGET_XFER_EOF;
6826
6827 if (get_traceframe_number () != -1)
6828 {
6829 VEC(mem_range_s) *available;
6830
6831 /* If we fail to get the set of available memory, then the
6832 target does not support querying traceframe info, and so we
6833 attempt reading from the traceframe anyway (assuming the
6834 target implements the old QTro packet then). */
6835 if (traceframe_available_memory (&available, memaddr, len))
6836 {
6837 struct cleanup *old_chain;
6838
6839 old_chain = make_cleanup (VEC_cleanup(mem_range_s), &available);
6840
6841 if (VEC_empty (mem_range_s, available)
6842 || VEC_index (mem_range_s, available, 0)->start != memaddr)
6843 {
6844 enum target_xfer_status res;
6845
6846 /* Don't read into the traceframe's available
6847 memory. */
6848 if (!VEC_empty (mem_range_s, available))
6849 {
6850 LONGEST oldlen = len;
6851
6852 len = VEC_index (mem_range_s, available, 0)->start - memaddr;
6853 gdb_assert (len <= oldlen);
6854 }
6855
6856 do_cleanups (old_chain);
6857
6858 /* This goes through the topmost target again. */
6859 res = remote_xfer_live_readonly_partial (ops, myaddr, memaddr,
6860 len, xfered_len);
6861 if (res == TARGET_XFER_OK)
6862 return TARGET_XFER_OK;
6863 else
6864 {
6865 /* No use trying further, we know some memory starting
6866 at MEMADDR isn't available. */
6867 *xfered_len = len;
6868 return TARGET_XFER_UNAVAILABLE;
6869 }
6870 }
6871
6872 /* Don't try to read more than how much is available, in
6873 case the target implements the deprecated QTro packet to
6874 cater for older GDBs (the target's knowledge of read-only
6875 sections may be outdated by now). */
6876 len = VEC_index (mem_range_s, available, 0)->length;
6877
6878 do_cleanups (old_chain);
6879 }
6880 }
6881
6882 return remote_read_bytes_1 (memaddr, myaddr, len, xfered_len);
6883 }
6884
6885 \f
6886
6887 /* Sends a packet with content determined by the printf format string
6888 FORMAT and the remaining arguments, then gets the reply. Returns
6889 whether the packet was a success, a failure, or unknown. */
6890
6891 static enum packet_result
6892 remote_send_printf (const char *format, ...)
6893 {
6894 struct remote_state *rs = get_remote_state ();
6895 int max_size = get_remote_packet_size ();
6896 va_list ap;
6897
6898 va_start (ap, format);
6899
6900 rs->buf[0] = '\0';
6901 if (vsnprintf (rs->buf, max_size, format, ap) >= max_size)
6902 internal_error (__FILE__, __LINE__, _("Too long remote packet."));
6903
6904 if (putpkt (rs->buf) < 0)
6905 error (_("Communication problem with target."));
6906
6907 rs->buf[0] = '\0';
6908 getpkt (&rs->buf, &rs->buf_size, 0);
6909
6910 return packet_check_result (rs->buf);
6911 }
6912
6913 static void
6914 restore_remote_timeout (void *p)
6915 {
6916 int value = *(int *)p;
6917
6918 remote_timeout = value;
6919 }
6920
6921 /* Flash writing can take quite some time. We'll set
6922 effectively infinite timeout for flash operations.
6923 In future, we'll need to decide on a better approach. */
6924 static const int remote_flash_timeout = 1000;
6925
6926 static void
6927 remote_flash_erase (struct target_ops *ops,
6928 ULONGEST address, LONGEST length)
6929 {
6930 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
6931 int saved_remote_timeout = remote_timeout;
6932 enum packet_result ret;
6933 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
6934 &saved_remote_timeout);
6935
6936 remote_timeout = remote_flash_timeout;
6937
6938 ret = remote_send_printf ("vFlashErase:%s,%s",
6939 phex (address, addr_size),
6940 phex (length, 4));
6941 switch (ret)
6942 {
6943 case PACKET_UNKNOWN:
6944 error (_("Remote target does not support flash erase"));
6945 case PACKET_ERROR:
6946 error (_("Error erasing flash with vFlashErase packet"));
6947 default:
6948 break;
6949 }
6950
6951 do_cleanups (back_to);
6952 }
6953
6954 static enum target_xfer_status
6955 remote_flash_write (struct target_ops *ops, ULONGEST address,
6956 ULONGEST length, ULONGEST *xfered_len,
6957 const gdb_byte *data)
6958 {
6959 int saved_remote_timeout = remote_timeout;
6960 enum target_xfer_status ret;
6961 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
6962 &saved_remote_timeout);
6963
6964 remote_timeout = remote_flash_timeout;
6965 ret = remote_write_bytes_aux ("vFlashWrite:", address, data, length,
6966 xfered_len,'X', 0);
6967 do_cleanups (back_to);
6968
6969 return ret;
6970 }
6971
6972 static void
6973 remote_flash_done (struct target_ops *ops)
6974 {
6975 int saved_remote_timeout = remote_timeout;
6976 int ret;
6977 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
6978 &saved_remote_timeout);
6979
6980 remote_timeout = remote_flash_timeout;
6981 ret = remote_send_printf ("vFlashDone");
6982 do_cleanups (back_to);
6983
6984 switch (ret)
6985 {
6986 case PACKET_UNKNOWN:
6987 error (_("Remote target does not support vFlashDone"));
6988 case PACKET_ERROR:
6989 error (_("Error finishing flash operation"));
6990 default:
6991 break;
6992 }
6993 }
6994
6995 static void
6996 remote_files_info (struct target_ops *ignore)
6997 {
6998 puts_filtered ("Debugging a target over a serial line.\n");
6999 }
7000 \f
7001 /* Stuff for dealing with the packets which are part of this protocol.
7002 See comment at top of file for details. */
7003
7004 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
7005 error to higher layers. Called when a serial error is detected.
7006 The exception message is STRING, followed by a colon and a blank,
7007 the system error message for errno at function entry and final dot
7008 for output compatibility with throw_perror_with_name. */
7009
7010 static void
7011 unpush_and_perror (const char *string)
7012 {
7013 int saved_errno = errno;
7014
7015 remote_unpush_target ();
7016 throw_error (TARGET_CLOSE_ERROR, "%s: %s.", string,
7017 safe_strerror (saved_errno));
7018 }
7019
7020 /* Read a single character from the remote end. */
7021
7022 static int
7023 readchar (int timeout)
7024 {
7025 int ch;
7026 struct remote_state *rs = get_remote_state ();
7027
7028 ch = serial_readchar (rs->remote_desc, timeout);
7029
7030 if (ch >= 0)
7031 return ch;
7032
7033 switch ((enum serial_rc) ch)
7034 {
7035 case SERIAL_EOF:
7036 remote_unpush_target ();
7037 throw_error (TARGET_CLOSE_ERROR, _("Remote connection closed"));
7038 /* no return */
7039 case SERIAL_ERROR:
7040 unpush_and_perror (_("Remote communication error. "
7041 "Target disconnected."));
7042 /* no return */
7043 case SERIAL_TIMEOUT:
7044 break;
7045 }
7046 return ch;
7047 }
7048
7049 /* Wrapper for serial_write that closes the target and throws if
7050 writing fails. */
7051
7052 static void
7053 remote_serial_write (const char *str, int len)
7054 {
7055 struct remote_state *rs = get_remote_state ();
7056
7057 if (serial_write (rs->remote_desc, str, len))
7058 {
7059 unpush_and_perror (_("Remote communication error. "
7060 "Target disconnected."));
7061 }
7062 }
7063
7064 /* Send the command in *BUF to the remote machine, and read the reply
7065 into *BUF. Report an error if we get an error reply. Resize
7066 *BUF using xrealloc if necessary to hold the result, and update
7067 *SIZEOF_BUF. */
7068
7069 static void
7070 remote_send (char **buf,
7071 long *sizeof_buf)
7072 {
7073 putpkt (*buf);
7074 getpkt (buf, sizeof_buf, 0);
7075
7076 if ((*buf)[0] == 'E')
7077 error (_("Remote failure reply: %s"), *buf);
7078 }
7079
7080 /* Return a pointer to an xmalloc'ed string representing an escaped
7081 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
7082 etc. The caller is responsible for releasing the returned
7083 memory. */
7084
7085 static char *
7086 escape_buffer (const char *buf, int n)
7087 {
7088 struct cleanup *old_chain;
7089 struct ui_file *stb;
7090 char *str;
7091
7092 stb = mem_fileopen ();
7093 old_chain = make_cleanup_ui_file_delete (stb);
7094
7095 fputstrn_unfiltered (buf, n, '\\', stb);
7096 str = ui_file_xstrdup (stb, NULL);
7097 do_cleanups (old_chain);
7098 return str;
7099 }
7100
7101 /* Display a null-terminated packet on stdout, for debugging, using C
7102 string notation. */
7103
7104 static void
7105 print_packet (const char *buf)
7106 {
7107 puts_filtered ("\"");
7108 fputstr_filtered (buf, '"', gdb_stdout);
7109 puts_filtered ("\"");
7110 }
7111
7112 int
7113 putpkt (const char *buf)
7114 {
7115 return putpkt_binary (buf, strlen (buf));
7116 }
7117
7118 /* Send a packet to the remote machine, with error checking. The data
7119 of the packet is in BUF. The string in BUF can be at most
7120 get_remote_packet_size () - 5 to account for the $, # and checksum,
7121 and for a possible /0 if we are debugging (remote_debug) and want
7122 to print the sent packet as a string. */
7123
7124 static int
7125 putpkt_binary (const char *buf, int cnt)
7126 {
7127 struct remote_state *rs = get_remote_state ();
7128 int i;
7129 unsigned char csum = 0;
7130 char *buf2 = alloca (cnt + 6);
7131
7132 int ch;
7133 int tcount = 0;
7134 char *p;
7135 char *message;
7136
7137 /* Catch cases like trying to read memory or listing threads while
7138 we're waiting for a stop reply. The remote server wouldn't be
7139 ready to handle this request, so we'd hang and timeout. We don't
7140 have to worry about this in synchronous mode, because in that
7141 case it's not possible to issue a command while the target is
7142 running. This is not a problem in non-stop mode, because in that
7143 case, the stub is always ready to process serial input. */
7144 if (!non_stop && target_can_async_p () && rs->waiting_for_stop_reply)
7145 {
7146 error (_("Cannot execute this command while the target is running.\n"
7147 "Use the \"interrupt\" command to stop the target\n"
7148 "and then try again."));
7149 }
7150
7151 /* We're sending out a new packet. Make sure we don't look at a
7152 stale cached response. */
7153 rs->cached_wait_status = 0;
7154
7155 /* Copy the packet into buffer BUF2, encapsulating it
7156 and giving it a checksum. */
7157
7158 p = buf2;
7159 *p++ = '$';
7160
7161 for (i = 0; i < cnt; i++)
7162 {
7163 csum += buf[i];
7164 *p++ = buf[i];
7165 }
7166 *p++ = '#';
7167 *p++ = tohex ((csum >> 4) & 0xf);
7168 *p++ = tohex (csum & 0xf);
7169
7170 /* Send it over and over until we get a positive ack. */
7171
7172 while (1)
7173 {
7174 int started_error_output = 0;
7175
7176 if (remote_debug)
7177 {
7178 struct cleanup *old_chain;
7179 char *str;
7180
7181 *p = '\0';
7182 str = escape_buffer (buf2, p - buf2);
7183 old_chain = make_cleanup (xfree, str);
7184 fprintf_unfiltered (gdb_stdlog, "Sending packet: %s...", str);
7185 gdb_flush (gdb_stdlog);
7186 do_cleanups (old_chain);
7187 }
7188 remote_serial_write (buf2, p - buf2);
7189
7190 /* If this is a no acks version of the remote protocol, send the
7191 packet and move on. */
7192 if (rs->noack_mode)
7193 break;
7194
7195 /* Read until either a timeout occurs (-2) or '+' is read.
7196 Handle any notification that arrives in the mean time. */
7197 while (1)
7198 {
7199 ch = readchar (remote_timeout);
7200
7201 if (remote_debug)
7202 {
7203 switch (ch)
7204 {
7205 case '+':
7206 case '-':
7207 case SERIAL_TIMEOUT:
7208 case '$':
7209 case '%':
7210 if (started_error_output)
7211 {
7212 putchar_unfiltered ('\n');
7213 started_error_output = 0;
7214 }
7215 }
7216 }
7217
7218 switch (ch)
7219 {
7220 case '+':
7221 if (remote_debug)
7222 fprintf_unfiltered (gdb_stdlog, "Ack\n");
7223 return 1;
7224 case '-':
7225 if (remote_debug)
7226 fprintf_unfiltered (gdb_stdlog, "Nak\n");
7227 /* FALLTHROUGH */
7228 case SERIAL_TIMEOUT:
7229 tcount++;
7230 if (tcount > 3)
7231 return 0;
7232 break; /* Retransmit buffer. */
7233 case '$':
7234 {
7235 if (remote_debug)
7236 fprintf_unfiltered (gdb_stdlog,
7237 "Packet instead of Ack, ignoring it\n");
7238 /* It's probably an old response sent because an ACK
7239 was lost. Gobble up the packet and ack it so it
7240 doesn't get retransmitted when we resend this
7241 packet. */
7242 skip_frame ();
7243 remote_serial_write ("+", 1);
7244 continue; /* Now, go look for +. */
7245 }
7246
7247 case '%':
7248 {
7249 int val;
7250
7251 /* If we got a notification, handle it, and go back to looking
7252 for an ack. */
7253 /* We've found the start of a notification. Now
7254 collect the data. */
7255 val = read_frame (&rs->buf, &rs->buf_size);
7256 if (val >= 0)
7257 {
7258 if (remote_debug)
7259 {
7260 struct cleanup *old_chain;
7261 char *str;
7262
7263 str = escape_buffer (rs->buf, val);
7264 old_chain = make_cleanup (xfree, str);
7265 fprintf_unfiltered (gdb_stdlog,
7266 " Notification received: %s\n",
7267 str);
7268 do_cleanups (old_chain);
7269 }
7270 handle_notification (rs->notif_state, rs->buf);
7271 /* We're in sync now, rewait for the ack. */
7272 tcount = 0;
7273 }
7274 else
7275 {
7276 if (remote_debug)
7277 {
7278 if (!started_error_output)
7279 {
7280 started_error_output = 1;
7281 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
7282 }
7283 fputc_unfiltered (ch & 0177, gdb_stdlog);
7284 fprintf_unfiltered (gdb_stdlog, "%s", rs->buf);
7285 }
7286 }
7287 continue;
7288 }
7289 /* fall-through */
7290 default:
7291 if (remote_debug)
7292 {
7293 if (!started_error_output)
7294 {
7295 started_error_output = 1;
7296 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
7297 }
7298 fputc_unfiltered (ch & 0177, gdb_stdlog);
7299 }
7300 continue;
7301 }
7302 break; /* Here to retransmit. */
7303 }
7304
7305 #if 0
7306 /* This is wrong. If doing a long backtrace, the user should be
7307 able to get out next time we call QUIT, without anything as
7308 violent as interrupt_query. If we want to provide a way out of
7309 here without getting to the next QUIT, it should be based on
7310 hitting ^C twice as in remote_wait. */
7311 if (quit_flag)
7312 {
7313 quit_flag = 0;
7314 interrupt_query ();
7315 }
7316 #endif
7317 }
7318 return 0;
7319 }
7320
7321 /* Come here after finding the start of a frame when we expected an
7322 ack. Do our best to discard the rest of this packet. */
7323
7324 static void
7325 skip_frame (void)
7326 {
7327 int c;
7328
7329 while (1)
7330 {
7331 c = readchar (remote_timeout);
7332 switch (c)
7333 {
7334 case SERIAL_TIMEOUT:
7335 /* Nothing we can do. */
7336 return;
7337 case '#':
7338 /* Discard the two bytes of checksum and stop. */
7339 c = readchar (remote_timeout);
7340 if (c >= 0)
7341 c = readchar (remote_timeout);
7342
7343 return;
7344 case '*': /* Run length encoding. */
7345 /* Discard the repeat count. */
7346 c = readchar (remote_timeout);
7347 if (c < 0)
7348 return;
7349 break;
7350 default:
7351 /* A regular character. */
7352 break;
7353 }
7354 }
7355 }
7356
7357 /* Come here after finding the start of the frame. Collect the rest
7358 into *BUF, verifying the checksum, length, and handling run-length
7359 compression. NUL terminate the buffer. If there is not enough room,
7360 expand *BUF using xrealloc.
7361
7362 Returns -1 on error, number of characters in buffer (ignoring the
7363 trailing NULL) on success. (could be extended to return one of the
7364 SERIAL status indications). */
7365
7366 static long
7367 read_frame (char **buf_p,
7368 long *sizeof_buf)
7369 {
7370 unsigned char csum;
7371 long bc;
7372 int c;
7373 char *buf = *buf_p;
7374 struct remote_state *rs = get_remote_state ();
7375
7376 csum = 0;
7377 bc = 0;
7378
7379 while (1)
7380 {
7381 c = readchar (remote_timeout);
7382 switch (c)
7383 {
7384 case SERIAL_TIMEOUT:
7385 if (remote_debug)
7386 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
7387 return -1;
7388 case '$':
7389 if (remote_debug)
7390 fputs_filtered ("Saw new packet start in middle of old one\n",
7391 gdb_stdlog);
7392 return -1; /* Start a new packet, count retries. */
7393 case '#':
7394 {
7395 unsigned char pktcsum;
7396 int check_0 = 0;
7397 int check_1 = 0;
7398
7399 buf[bc] = '\0';
7400
7401 check_0 = readchar (remote_timeout);
7402 if (check_0 >= 0)
7403 check_1 = readchar (remote_timeout);
7404
7405 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
7406 {
7407 if (remote_debug)
7408 fputs_filtered ("Timeout in checksum, retrying\n",
7409 gdb_stdlog);
7410 return -1;
7411 }
7412 else if (check_0 < 0 || check_1 < 0)
7413 {
7414 if (remote_debug)
7415 fputs_filtered ("Communication error in checksum\n",
7416 gdb_stdlog);
7417 return -1;
7418 }
7419
7420 /* Don't recompute the checksum; with no ack packets we
7421 don't have any way to indicate a packet retransmission
7422 is necessary. */
7423 if (rs->noack_mode)
7424 return bc;
7425
7426 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
7427 if (csum == pktcsum)
7428 return bc;
7429
7430 if (remote_debug)
7431 {
7432 struct cleanup *old_chain;
7433 char *str;
7434
7435 str = escape_buffer (buf, bc);
7436 old_chain = make_cleanup (xfree, str);
7437 fprintf_unfiltered (gdb_stdlog,
7438 "Bad checksum, sentsum=0x%x, "
7439 "csum=0x%x, buf=%s\n",
7440 pktcsum, csum, str);
7441 do_cleanups (old_chain);
7442 }
7443 /* Number of characters in buffer ignoring trailing
7444 NULL. */
7445 return -1;
7446 }
7447 case '*': /* Run length encoding. */
7448 {
7449 int repeat;
7450
7451 csum += c;
7452 c = readchar (remote_timeout);
7453 csum += c;
7454 repeat = c - ' ' + 3; /* Compute repeat count. */
7455
7456 /* The character before ``*'' is repeated. */
7457
7458 if (repeat > 0 && repeat <= 255 && bc > 0)
7459 {
7460 if (bc + repeat - 1 >= *sizeof_buf - 1)
7461 {
7462 /* Make some more room in the buffer. */
7463 *sizeof_buf += repeat;
7464 *buf_p = xrealloc (*buf_p, *sizeof_buf);
7465 buf = *buf_p;
7466 }
7467
7468 memset (&buf[bc], buf[bc - 1], repeat);
7469 bc += repeat;
7470 continue;
7471 }
7472
7473 buf[bc] = '\0';
7474 printf_filtered (_("Invalid run length encoding: %s\n"), buf);
7475 return -1;
7476 }
7477 default:
7478 if (bc >= *sizeof_buf - 1)
7479 {
7480 /* Make some more room in the buffer. */
7481 *sizeof_buf *= 2;
7482 *buf_p = xrealloc (*buf_p, *sizeof_buf);
7483 buf = *buf_p;
7484 }
7485
7486 buf[bc++] = c;
7487 csum += c;
7488 continue;
7489 }
7490 }
7491 }
7492
7493 /* Read a packet from the remote machine, with error checking, and
7494 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
7495 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
7496 rather than timing out; this is used (in synchronous mode) to wait
7497 for a target that is is executing user code to stop. */
7498 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
7499 don't have to change all the calls to getpkt to deal with the
7500 return value, because at the moment I don't know what the right
7501 thing to do it for those. */
7502 void
7503 getpkt (char **buf,
7504 long *sizeof_buf,
7505 int forever)
7506 {
7507 int timed_out;
7508
7509 timed_out = getpkt_sane (buf, sizeof_buf, forever);
7510 }
7511
7512
7513 /* Read a packet from the remote machine, with error checking, and
7514 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
7515 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
7516 rather than timing out; this is used (in synchronous mode) to wait
7517 for a target that is is executing user code to stop. If FOREVER ==
7518 0, this function is allowed to time out gracefully and return an
7519 indication of this to the caller. Otherwise return the number of
7520 bytes read. If EXPECTING_NOTIF, consider receiving a notification
7521 enough reason to return to the caller. *IS_NOTIF is an output
7522 boolean that indicates whether *BUF holds a notification or not
7523 (a regular packet). */
7524
7525 static int
7526 getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf, int forever,
7527 int expecting_notif, int *is_notif)
7528 {
7529 struct remote_state *rs = get_remote_state ();
7530 int c;
7531 int tries;
7532 int timeout;
7533 int val = -1;
7534
7535 /* We're reading a new response. Make sure we don't look at a
7536 previously cached response. */
7537 rs->cached_wait_status = 0;
7538
7539 strcpy (*buf, "timeout");
7540
7541 if (forever)
7542 timeout = watchdog > 0 ? watchdog : -1;
7543 else if (expecting_notif)
7544 timeout = 0; /* There should already be a char in the buffer. If
7545 not, bail out. */
7546 else
7547 timeout = remote_timeout;
7548
7549 #define MAX_TRIES 3
7550
7551 /* Process any number of notifications, and then return when
7552 we get a packet. */
7553 for (;;)
7554 {
7555 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
7556 times. */
7557 for (tries = 1; tries <= MAX_TRIES; tries++)
7558 {
7559 /* This can loop forever if the remote side sends us
7560 characters continuously, but if it pauses, we'll get
7561 SERIAL_TIMEOUT from readchar because of timeout. Then
7562 we'll count that as a retry.
7563
7564 Note that even when forever is set, we will only wait
7565 forever prior to the start of a packet. After that, we
7566 expect characters to arrive at a brisk pace. They should
7567 show up within remote_timeout intervals. */
7568 do
7569 c = readchar (timeout);
7570 while (c != SERIAL_TIMEOUT && c != '$' && c != '%');
7571
7572 if (c == SERIAL_TIMEOUT)
7573 {
7574 if (expecting_notif)
7575 return -1; /* Don't complain, it's normal to not get
7576 anything in this case. */
7577
7578 if (forever) /* Watchdog went off? Kill the target. */
7579 {
7580 QUIT;
7581 remote_unpush_target ();
7582 throw_error (TARGET_CLOSE_ERROR,
7583 _("Watchdog timeout has expired. "
7584 "Target detached."));
7585 }
7586 if (remote_debug)
7587 fputs_filtered ("Timed out.\n", gdb_stdlog);
7588 }
7589 else
7590 {
7591 /* We've found the start of a packet or notification.
7592 Now collect the data. */
7593 val = read_frame (buf, sizeof_buf);
7594 if (val >= 0)
7595 break;
7596 }
7597
7598 remote_serial_write ("-", 1);
7599 }
7600
7601 if (tries > MAX_TRIES)
7602 {
7603 /* We have tried hard enough, and just can't receive the
7604 packet/notification. Give up. */
7605 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
7606
7607 /* Skip the ack char if we're in no-ack mode. */
7608 if (!rs->noack_mode)
7609 remote_serial_write ("+", 1);
7610 return -1;
7611 }
7612
7613 /* If we got an ordinary packet, return that to our caller. */
7614 if (c == '$')
7615 {
7616 if (remote_debug)
7617 {
7618 struct cleanup *old_chain;
7619 char *str;
7620
7621 str = escape_buffer (*buf, val);
7622 old_chain = make_cleanup (xfree, str);
7623 fprintf_unfiltered (gdb_stdlog, "Packet received: %s\n", str);
7624 do_cleanups (old_chain);
7625 }
7626
7627 /* Skip the ack char if we're in no-ack mode. */
7628 if (!rs->noack_mode)
7629 remote_serial_write ("+", 1);
7630 if (is_notif != NULL)
7631 *is_notif = 0;
7632 return val;
7633 }
7634
7635 /* If we got a notification, handle it, and go back to looking
7636 for a packet. */
7637 else
7638 {
7639 gdb_assert (c == '%');
7640
7641 if (remote_debug)
7642 {
7643 struct cleanup *old_chain;
7644 char *str;
7645
7646 str = escape_buffer (*buf, val);
7647 old_chain = make_cleanup (xfree, str);
7648 fprintf_unfiltered (gdb_stdlog,
7649 " Notification received: %s\n",
7650 str);
7651 do_cleanups (old_chain);
7652 }
7653 if (is_notif != NULL)
7654 *is_notif = 1;
7655
7656 handle_notification (rs->notif_state, *buf);
7657
7658 /* Notifications require no acknowledgement. */
7659
7660 if (expecting_notif)
7661 return val;
7662 }
7663 }
7664 }
7665
7666 static int
7667 getpkt_sane (char **buf, long *sizeof_buf, int forever)
7668 {
7669 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 0, NULL);
7670 }
7671
7672 static int
7673 getpkt_or_notif_sane (char **buf, long *sizeof_buf, int forever,
7674 int *is_notif)
7675 {
7676 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 1,
7677 is_notif);
7678 }
7679
7680 \f
7681 static void
7682 remote_kill (struct target_ops *ops)
7683 {
7684 volatile struct gdb_exception ex;
7685
7686 /* Catch errors so the user can quit from gdb even when we
7687 aren't on speaking terms with the remote system. */
7688 TRY_CATCH (ex, RETURN_MASK_ERROR)
7689 {
7690 putpkt ("k");
7691 }
7692 if (ex.reason < 0)
7693 {
7694 if (ex.error == TARGET_CLOSE_ERROR)
7695 {
7696 /* If we got an (EOF) error that caused the target
7697 to go away, then we're done, that's what we wanted.
7698 "k" is susceptible to cause a premature EOF, given
7699 that the remote server isn't actually required to
7700 reply to "k", and it can happen that it doesn't
7701 even get to reply ACK to the "k". */
7702 return;
7703 }
7704
7705 /* Otherwise, something went wrong. We didn't actually kill
7706 the target. Just propagate the exception, and let the
7707 user or higher layers decide what to do. */
7708 throw_exception (ex);
7709 }
7710
7711 /* We've killed the remote end, we get to mourn it. Since this is
7712 target remote, single-process, mourning the inferior also
7713 unpushes remote_ops. */
7714 target_mourn_inferior ();
7715 }
7716
7717 static int
7718 remote_vkill (int pid, struct remote_state *rs)
7719 {
7720 if (packet_support (PACKET_vKill) == PACKET_DISABLE)
7721 return -1;
7722
7723 /* Tell the remote target to detach. */
7724 xsnprintf (rs->buf, get_remote_packet_size (), "vKill;%x", pid);
7725 putpkt (rs->buf);
7726 getpkt (&rs->buf, &rs->buf_size, 0);
7727
7728 switch (packet_ok (rs->buf,
7729 &remote_protocol_packets[PACKET_vKill]))
7730 {
7731 case PACKET_OK:
7732 return 0;
7733 case PACKET_ERROR:
7734 return 1;
7735 case PACKET_UNKNOWN:
7736 return -1;
7737 default:
7738 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
7739 }
7740 }
7741
7742 static void
7743 extended_remote_kill (struct target_ops *ops)
7744 {
7745 int res;
7746 int pid = ptid_get_pid (inferior_ptid);
7747 struct remote_state *rs = get_remote_state ();
7748
7749 res = remote_vkill (pid, rs);
7750 if (res == -1 && !(rs->extended && remote_multi_process_p (rs)))
7751 {
7752 /* Don't try 'k' on a multi-process aware stub -- it has no way
7753 to specify the pid. */
7754
7755 putpkt ("k");
7756 #if 0
7757 getpkt (&rs->buf, &rs->buf_size, 0);
7758 if (rs->buf[0] != 'O' || rs->buf[0] != 'K')
7759 res = 1;
7760 #else
7761 /* Don't wait for it to die. I'm not really sure it matters whether
7762 we do or not. For the existing stubs, kill is a noop. */
7763 res = 0;
7764 #endif
7765 }
7766
7767 if (res != 0)
7768 error (_("Can't kill process"));
7769
7770 target_mourn_inferior ();
7771 }
7772
7773 static void
7774 remote_mourn (struct target_ops *ops)
7775 {
7776 remote_mourn_1 (ops);
7777 }
7778
7779 /* Worker function for remote_mourn. */
7780 static void
7781 remote_mourn_1 (struct target_ops *target)
7782 {
7783 unpush_target (target);
7784
7785 /* remote_close takes care of doing most of the clean up. */
7786 generic_mourn_inferior ();
7787 }
7788
7789 static void
7790 extended_remote_mourn_1 (struct target_ops *target)
7791 {
7792 struct remote_state *rs = get_remote_state ();
7793
7794 /* In case we got here due to an error, but we're going to stay
7795 connected. */
7796 rs->waiting_for_stop_reply = 0;
7797
7798 /* If the current general thread belonged to the process we just
7799 detached from or has exited, the remote side current general
7800 thread becomes undefined. Considering a case like this:
7801
7802 - We just got here due to a detach.
7803 - The process that we're detaching from happens to immediately
7804 report a global breakpoint being hit in non-stop mode, in the
7805 same thread we had selected before.
7806 - GDB attaches to this process again.
7807 - This event happens to be the next event we handle.
7808
7809 GDB would consider that the current general thread didn't need to
7810 be set on the stub side (with Hg), since for all it knew,
7811 GENERAL_THREAD hadn't changed.
7812
7813 Notice that although in all-stop mode, the remote server always
7814 sets the current thread to the thread reporting the stop event,
7815 that doesn't happen in non-stop mode; in non-stop, the stub *must
7816 not* change the current thread when reporting a breakpoint hit,
7817 due to the decoupling of event reporting and event handling.
7818
7819 To keep things simple, we always invalidate our notion of the
7820 current thread. */
7821 record_currthread (rs, minus_one_ptid);
7822
7823 /* Unlike "target remote", we do not want to unpush the target; then
7824 the next time the user says "run", we won't be connected. */
7825
7826 /* Call common code to mark the inferior as not running. */
7827 generic_mourn_inferior ();
7828
7829 if (!have_inferiors ())
7830 {
7831 if (!remote_multi_process_p (rs))
7832 {
7833 /* Check whether the target is running now - some remote stubs
7834 automatically restart after kill. */
7835 putpkt ("?");
7836 getpkt (&rs->buf, &rs->buf_size, 0);
7837
7838 if (rs->buf[0] == 'S' || rs->buf[0] == 'T')
7839 {
7840 /* Assume that the target has been restarted. Set
7841 inferior_ptid so that bits of core GDB realizes
7842 there's something here, e.g., so that the user can
7843 say "kill" again. */
7844 inferior_ptid = magic_null_ptid;
7845 }
7846 }
7847 }
7848 }
7849
7850 static void
7851 extended_remote_mourn (struct target_ops *ops)
7852 {
7853 extended_remote_mourn_1 (ops);
7854 }
7855
7856 static int
7857 extended_remote_supports_disable_randomization (struct target_ops *self)
7858 {
7859 return packet_support (PACKET_QDisableRandomization) == PACKET_ENABLE;
7860 }
7861
7862 static void
7863 extended_remote_disable_randomization (int val)
7864 {
7865 struct remote_state *rs = get_remote_state ();
7866 char *reply;
7867
7868 xsnprintf (rs->buf, get_remote_packet_size (), "QDisableRandomization:%x",
7869 val);
7870 putpkt (rs->buf);
7871 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
7872 if (*reply == '\0')
7873 error (_("Target does not support QDisableRandomization."));
7874 if (strcmp (reply, "OK") != 0)
7875 error (_("Bogus QDisableRandomization reply from target: %s"), reply);
7876 }
7877
7878 static int
7879 extended_remote_run (char *args)
7880 {
7881 struct remote_state *rs = get_remote_state ();
7882 int len;
7883
7884 /* If the user has disabled vRun support, or we have detected that
7885 support is not available, do not try it. */
7886 if (packet_support (PACKET_vRun) == PACKET_DISABLE)
7887 return -1;
7888
7889 strcpy (rs->buf, "vRun;");
7890 len = strlen (rs->buf);
7891
7892 if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ())
7893 error (_("Remote file name too long for run packet"));
7894 len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len,
7895 strlen (remote_exec_file));
7896
7897 gdb_assert (args != NULL);
7898 if (*args)
7899 {
7900 struct cleanup *back_to;
7901 int i;
7902 char **argv;
7903
7904 argv = gdb_buildargv (args);
7905 back_to = make_cleanup_freeargv (argv);
7906 for (i = 0; argv[i] != NULL; i++)
7907 {
7908 if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ())
7909 error (_("Argument list too long for run packet"));
7910 rs->buf[len++] = ';';
7911 len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len,
7912 strlen (argv[i]));
7913 }
7914 do_cleanups (back_to);
7915 }
7916
7917 rs->buf[len++] = '\0';
7918
7919 putpkt (rs->buf);
7920 getpkt (&rs->buf, &rs->buf_size, 0);
7921
7922 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]))
7923 {
7924 case PACKET_OK:
7925 /* We have a wait response. All is well. */
7926 return 0;
7927 case PACKET_UNKNOWN:
7928 return -1;
7929 case PACKET_ERROR:
7930 if (remote_exec_file[0] == '\0')
7931 error (_("Running the default executable on the remote target failed; "
7932 "try \"set remote exec-file\"?"));
7933 else
7934 error (_("Running \"%s\" on the remote target failed"),
7935 remote_exec_file);
7936 default:
7937 gdb_assert_not_reached (_("bad switch"));
7938 }
7939 }
7940
7941 /* In the extended protocol we want to be able to do things like
7942 "run" and have them basically work as expected. So we need
7943 a special create_inferior function. We support changing the
7944 executable file and the command line arguments, but not the
7945 environment. */
7946
7947 static void
7948 extended_remote_create_inferior (struct target_ops *ops,
7949 char *exec_file, char *args,
7950 char **env, int from_tty)
7951 {
7952 int run_worked;
7953 char *stop_reply;
7954 struct remote_state *rs = get_remote_state ();
7955
7956 /* If running asynchronously, register the target file descriptor
7957 with the event loop. */
7958 if (target_can_async_p ())
7959 target_async (inferior_event_handler, 0);
7960
7961 /* Disable address space randomization if requested (and supported). */
7962 if (extended_remote_supports_disable_randomization (ops))
7963 extended_remote_disable_randomization (disable_randomization);
7964
7965 /* Now restart the remote server. */
7966 run_worked = extended_remote_run (args) != -1;
7967 if (!run_worked)
7968 {
7969 /* vRun was not supported. Fail if we need it to do what the
7970 user requested. */
7971 if (remote_exec_file[0])
7972 error (_("Remote target does not support \"set remote exec-file\""));
7973 if (args[0])
7974 error (_("Remote target does not support \"set args\" or run <ARGS>"));
7975
7976 /* Fall back to "R". */
7977 extended_remote_restart ();
7978 }
7979
7980 if (!have_inferiors ())
7981 {
7982 /* Clean up from the last time we ran, before we mark the target
7983 running again. This will mark breakpoints uninserted, and
7984 get_offsets may insert breakpoints. */
7985 init_thread_list ();
7986 init_wait_for_inferior ();
7987 }
7988
7989 /* vRun's success return is a stop reply. */
7990 stop_reply = run_worked ? rs->buf : NULL;
7991 add_current_inferior_and_thread (stop_reply);
7992
7993 /* Get updated offsets, if the stub uses qOffsets. */
7994 get_offsets ();
7995 }
7996 \f
7997
7998 /* Given a location's target info BP_TGT and the packet buffer BUF, output
7999 the list of conditions (in agent expression bytecode format), if any, the
8000 target needs to evaluate. The output is placed into the packet buffer
8001 started from BUF and ended at BUF_END. */
8002
8003 static int
8004 remote_add_target_side_condition (struct gdbarch *gdbarch,
8005 struct bp_target_info *bp_tgt, char *buf,
8006 char *buf_end)
8007 {
8008 struct agent_expr *aexpr = NULL;
8009 int i, ix;
8010 char *pkt;
8011 char *buf_start = buf;
8012
8013 if (VEC_empty (agent_expr_p, bp_tgt->conditions))
8014 return 0;
8015
8016 buf += strlen (buf);
8017 xsnprintf (buf, buf_end - buf, "%s", ";");
8018 buf++;
8019
8020 /* Send conditions to the target and free the vector. */
8021 for (ix = 0;
8022 VEC_iterate (agent_expr_p, bp_tgt->conditions, ix, aexpr);
8023 ix++)
8024 {
8025 xsnprintf (buf, buf_end - buf, "X%x,", aexpr->len);
8026 buf += strlen (buf);
8027 for (i = 0; i < aexpr->len; ++i)
8028 buf = pack_hex_byte (buf, aexpr->buf[i]);
8029 *buf = '\0';
8030 }
8031 return 0;
8032 }
8033
8034 static void
8035 remote_add_target_side_commands (struct gdbarch *gdbarch,
8036 struct bp_target_info *bp_tgt, char *buf)
8037 {
8038 struct agent_expr *aexpr = NULL;
8039 int i, ix;
8040
8041 if (VEC_empty (agent_expr_p, bp_tgt->tcommands))
8042 return;
8043
8044 buf += strlen (buf);
8045
8046 sprintf (buf, ";cmds:%x,", bp_tgt->persist);
8047 buf += strlen (buf);
8048
8049 /* Concatenate all the agent expressions that are commands into the
8050 cmds parameter. */
8051 for (ix = 0;
8052 VEC_iterate (agent_expr_p, bp_tgt->tcommands, ix, aexpr);
8053 ix++)
8054 {
8055 sprintf (buf, "X%x,", aexpr->len);
8056 buf += strlen (buf);
8057 for (i = 0; i < aexpr->len; ++i)
8058 buf = pack_hex_byte (buf, aexpr->buf[i]);
8059 *buf = '\0';
8060 }
8061 }
8062
8063 /* Insert a breakpoint. On targets that have software breakpoint
8064 support, we ask the remote target to do the work; on targets
8065 which don't, we insert a traditional memory breakpoint. */
8066
8067 static int
8068 remote_insert_breakpoint (struct target_ops *ops,
8069 struct gdbarch *gdbarch,
8070 struct bp_target_info *bp_tgt)
8071 {
8072 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
8073 If it succeeds, then set the support to PACKET_ENABLE. If it
8074 fails, and the user has explicitly requested the Z support then
8075 report an error, otherwise, mark it disabled and go on. */
8076
8077 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
8078 {
8079 CORE_ADDR addr = bp_tgt->reqstd_address;
8080 struct remote_state *rs;
8081 char *p, *endbuf;
8082 int bpsize;
8083 struct condition_list *cond = NULL;
8084
8085 /* Make sure the remote is pointing at the right process, if
8086 necessary. */
8087 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
8088 set_general_process ();
8089
8090 gdbarch_remote_breakpoint_from_pc (gdbarch, &addr, &bpsize);
8091
8092 rs = get_remote_state ();
8093 p = rs->buf;
8094 endbuf = rs->buf + get_remote_packet_size ();
8095
8096 *(p++) = 'Z';
8097 *(p++) = '0';
8098 *(p++) = ',';
8099 addr = (ULONGEST) remote_address_masked (addr);
8100 p += hexnumstr (p, addr);
8101 xsnprintf (p, endbuf - p, ",%d", bpsize);
8102
8103 if (remote_supports_cond_breakpoints (ops))
8104 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
8105
8106 if (remote_can_run_breakpoint_commands (ops))
8107 remote_add_target_side_commands (gdbarch, bp_tgt, p);
8108
8109 putpkt (rs->buf);
8110 getpkt (&rs->buf, &rs->buf_size, 0);
8111
8112 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0]))
8113 {
8114 case PACKET_ERROR:
8115 return -1;
8116 case PACKET_OK:
8117 bp_tgt->placed_address = addr;
8118 bp_tgt->placed_size = bpsize;
8119 return 0;
8120 case PACKET_UNKNOWN:
8121 break;
8122 }
8123 }
8124
8125 /* If this breakpoint has target-side commands but this stub doesn't
8126 support Z0 packets, throw error. */
8127 if (!VEC_empty (agent_expr_p, bp_tgt->tcommands))
8128 throw_error (NOT_SUPPORTED_ERROR, _("\
8129 Target doesn't support breakpoints that have target side commands."));
8130
8131 return memory_insert_breakpoint (ops, gdbarch, bp_tgt);
8132 }
8133
8134 static int
8135 remote_remove_breakpoint (struct target_ops *ops,
8136 struct gdbarch *gdbarch,
8137 struct bp_target_info *bp_tgt)
8138 {
8139 CORE_ADDR addr = bp_tgt->placed_address;
8140 struct remote_state *rs = get_remote_state ();
8141
8142 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
8143 {
8144 char *p = rs->buf;
8145 char *endbuf = rs->buf + get_remote_packet_size ();
8146
8147 /* Make sure the remote is pointing at the right process, if
8148 necessary. */
8149 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
8150 set_general_process ();
8151
8152 *(p++) = 'z';
8153 *(p++) = '0';
8154 *(p++) = ',';
8155
8156 addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
8157 p += hexnumstr (p, addr);
8158 xsnprintf (p, endbuf - p, ",%d", bp_tgt->placed_size);
8159
8160 putpkt (rs->buf);
8161 getpkt (&rs->buf, &rs->buf_size, 0);
8162
8163 return (rs->buf[0] == 'E');
8164 }
8165
8166 return memory_remove_breakpoint (ops, gdbarch, bp_tgt);
8167 }
8168
8169 static int
8170 watchpoint_to_Z_packet (int type)
8171 {
8172 switch (type)
8173 {
8174 case hw_write:
8175 return Z_PACKET_WRITE_WP;
8176 break;
8177 case hw_read:
8178 return Z_PACKET_READ_WP;
8179 break;
8180 case hw_access:
8181 return Z_PACKET_ACCESS_WP;
8182 break;
8183 default:
8184 internal_error (__FILE__, __LINE__,
8185 _("hw_bp_to_z: bad watchpoint type %d"), type);
8186 }
8187 }
8188
8189 static int
8190 remote_insert_watchpoint (struct target_ops *self,
8191 CORE_ADDR addr, int len, int type,
8192 struct expression *cond)
8193 {
8194 struct remote_state *rs = get_remote_state ();
8195 char *endbuf = rs->buf + get_remote_packet_size ();
8196 char *p;
8197 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
8198
8199 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
8200 return 1;
8201
8202 /* Make sure the remote is pointing at the right process, if
8203 necessary. */
8204 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
8205 set_general_process ();
8206
8207 xsnprintf (rs->buf, endbuf - rs->buf, "Z%x,", packet);
8208 p = strchr (rs->buf, '\0');
8209 addr = remote_address_masked (addr);
8210 p += hexnumstr (p, (ULONGEST) addr);
8211 xsnprintf (p, endbuf - p, ",%x", len);
8212
8213 putpkt (rs->buf);
8214 getpkt (&rs->buf, &rs->buf_size, 0);
8215
8216 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
8217 {
8218 case PACKET_ERROR:
8219 return -1;
8220 case PACKET_UNKNOWN:
8221 return 1;
8222 case PACKET_OK:
8223 return 0;
8224 }
8225 internal_error (__FILE__, __LINE__,
8226 _("remote_insert_watchpoint: reached end of function"));
8227 }
8228
8229 static int
8230 remote_watchpoint_addr_within_range (struct target_ops *target, CORE_ADDR addr,
8231 CORE_ADDR start, int length)
8232 {
8233 CORE_ADDR diff = remote_address_masked (addr - start);
8234
8235 return diff < length;
8236 }
8237
8238
8239 static int
8240 remote_remove_watchpoint (struct target_ops *self,
8241 CORE_ADDR addr, int len, int type,
8242 struct expression *cond)
8243 {
8244 struct remote_state *rs = get_remote_state ();
8245 char *endbuf = rs->buf + get_remote_packet_size ();
8246 char *p;
8247 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
8248
8249 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
8250 return -1;
8251
8252 /* Make sure the remote is pointing at the right process, if
8253 necessary. */
8254 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
8255 set_general_process ();
8256
8257 xsnprintf (rs->buf, endbuf - rs->buf, "z%x,", packet);
8258 p = strchr (rs->buf, '\0');
8259 addr = remote_address_masked (addr);
8260 p += hexnumstr (p, (ULONGEST) addr);
8261 xsnprintf (p, endbuf - p, ",%x", len);
8262 putpkt (rs->buf);
8263 getpkt (&rs->buf, &rs->buf_size, 0);
8264
8265 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
8266 {
8267 case PACKET_ERROR:
8268 case PACKET_UNKNOWN:
8269 return -1;
8270 case PACKET_OK:
8271 return 0;
8272 }
8273 internal_error (__FILE__, __LINE__,
8274 _("remote_remove_watchpoint: reached end of function"));
8275 }
8276
8277
8278 int remote_hw_watchpoint_limit = -1;
8279 int remote_hw_watchpoint_length_limit = -1;
8280 int remote_hw_breakpoint_limit = -1;
8281
8282 static int
8283 remote_region_ok_for_hw_watchpoint (struct target_ops *self,
8284 CORE_ADDR addr, int len)
8285 {
8286 if (remote_hw_watchpoint_length_limit == 0)
8287 return 0;
8288 else if (remote_hw_watchpoint_length_limit < 0)
8289 return 1;
8290 else if (len <= remote_hw_watchpoint_length_limit)
8291 return 1;
8292 else
8293 return 0;
8294 }
8295
8296 static int
8297 remote_check_watch_resources (struct target_ops *self,
8298 int type, int cnt, int ot)
8299 {
8300 if (type == bp_hardware_breakpoint)
8301 {
8302 if (remote_hw_breakpoint_limit == 0)
8303 return 0;
8304 else if (remote_hw_breakpoint_limit < 0)
8305 return 1;
8306 else if (cnt <= remote_hw_breakpoint_limit)
8307 return 1;
8308 }
8309 else
8310 {
8311 if (remote_hw_watchpoint_limit == 0)
8312 return 0;
8313 else if (remote_hw_watchpoint_limit < 0)
8314 return 1;
8315 else if (ot)
8316 return -1;
8317 else if (cnt <= remote_hw_watchpoint_limit)
8318 return 1;
8319 }
8320 return -1;
8321 }
8322
8323 static int
8324 remote_stopped_by_watchpoint (struct target_ops *ops)
8325 {
8326 struct remote_state *rs = get_remote_state ();
8327
8328 return rs->remote_stopped_by_watchpoint_p;
8329 }
8330
8331 static int
8332 remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
8333 {
8334 struct remote_state *rs = get_remote_state ();
8335 int rc = 0;
8336
8337 if (remote_stopped_by_watchpoint (target))
8338 {
8339 *addr_p = rs->remote_watch_data_address;
8340 rc = 1;
8341 }
8342
8343 return rc;
8344 }
8345
8346
8347 static int
8348 remote_insert_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch,
8349 struct bp_target_info *bp_tgt)
8350 {
8351 CORE_ADDR addr = bp_tgt->reqstd_address;
8352 struct remote_state *rs;
8353 char *p, *endbuf;
8354 char *message;
8355 int bpsize;
8356
8357 /* The length field should be set to the size of a breakpoint
8358 instruction, even though we aren't inserting one ourselves. */
8359
8360 gdbarch_remote_breakpoint_from_pc (gdbarch, &addr, &bpsize);
8361
8362 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
8363 return -1;
8364
8365 /* Make sure the remote is pointing at the right process, if
8366 necessary. */
8367 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
8368 set_general_process ();
8369
8370 rs = get_remote_state ();
8371 p = rs->buf;
8372 endbuf = rs->buf + get_remote_packet_size ();
8373
8374 *(p++) = 'Z';
8375 *(p++) = '1';
8376 *(p++) = ',';
8377
8378 addr = remote_address_masked (addr);
8379 p += hexnumstr (p, (ULONGEST) addr);
8380 xsnprintf (p, endbuf - p, ",%x", bpsize);
8381
8382 if (remote_supports_cond_breakpoints (self))
8383 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
8384
8385 if (remote_can_run_breakpoint_commands (self))
8386 remote_add_target_side_commands (gdbarch, bp_tgt, p);
8387
8388 putpkt (rs->buf);
8389 getpkt (&rs->buf, &rs->buf_size, 0);
8390
8391 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
8392 {
8393 case PACKET_ERROR:
8394 if (rs->buf[1] == '.')
8395 {
8396 message = strchr (rs->buf + 2, '.');
8397 if (message)
8398 error (_("Remote failure reply: %s"), message + 1);
8399 }
8400 return -1;
8401 case PACKET_UNKNOWN:
8402 return -1;
8403 case PACKET_OK:
8404 bp_tgt->placed_address = addr;
8405 bp_tgt->placed_size = bpsize;
8406 return 0;
8407 }
8408 internal_error (__FILE__, __LINE__,
8409 _("remote_insert_hw_breakpoint: reached end of function"));
8410 }
8411
8412
8413 static int
8414 remote_remove_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch,
8415 struct bp_target_info *bp_tgt)
8416 {
8417 CORE_ADDR addr;
8418 struct remote_state *rs = get_remote_state ();
8419 char *p = rs->buf;
8420 char *endbuf = rs->buf + get_remote_packet_size ();
8421
8422 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
8423 return -1;
8424
8425 /* Make sure the remote is pointing at the right process, if
8426 necessary. */
8427 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
8428 set_general_process ();
8429
8430 *(p++) = 'z';
8431 *(p++) = '1';
8432 *(p++) = ',';
8433
8434 addr = remote_address_masked (bp_tgt->placed_address);
8435 p += hexnumstr (p, (ULONGEST) addr);
8436 xsnprintf (p, endbuf - p, ",%x", bp_tgt->placed_size);
8437
8438 putpkt (rs->buf);
8439 getpkt (&rs->buf, &rs->buf_size, 0);
8440
8441 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
8442 {
8443 case PACKET_ERROR:
8444 case PACKET_UNKNOWN:
8445 return -1;
8446 case PACKET_OK:
8447 return 0;
8448 }
8449 internal_error (__FILE__, __LINE__,
8450 _("remote_remove_hw_breakpoint: reached end of function"));
8451 }
8452
8453 /* Verify memory using the "qCRC:" request. */
8454
8455 static int
8456 remote_verify_memory (struct target_ops *ops,
8457 const gdb_byte *data, CORE_ADDR lma, ULONGEST size)
8458 {
8459 struct remote_state *rs = get_remote_state ();
8460 unsigned long host_crc, target_crc;
8461 char *tmp;
8462
8463 /* It doesn't make sense to use qCRC if the remote target is
8464 connected but not running. */
8465 if (target_has_execution && packet_support (PACKET_qCRC) != PACKET_DISABLE)
8466 {
8467 enum packet_result result;
8468
8469 /* Make sure the remote is pointing at the right process. */
8470 set_general_process ();
8471
8472 /* FIXME: assumes lma can fit into long. */
8473 xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx",
8474 (long) lma, (long) size);
8475 putpkt (rs->buf);
8476
8477 /* Be clever; compute the host_crc before waiting for target
8478 reply. */
8479 host_crc = xcrc32 (data, size, 0xffffffff);
8480
8481 getpkt (&rs->buf, &rs->buf_size, 0);
8482
8483 result = packet_ok (rs->buf,
8484 &remote_protocol_packets[PACKET_qCRC]);
8485 if (result == PACKET_ERROR)
8486 return -1;
8487 else if (result == PACKET_OK)
8488 {
8489 for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++)
8490 target_crc = target_crc * 16 + fromhex (*tmp);
8491
8492 return (host_crc == target_crc);
8493 }
8494 }
8495
8496 return simple_verify_memory (ops, data, lma, size);
8497 }
8498
8499 /* compare-sections command
8500
8501 With no arguments, compares each loadable section in the exec bfd
8502 with the same memory range on the target, and reports mismatches.
8503 Useful for verifying the image on the target against the exec file. */
8504
8505 static void
8506 compare_sections_command (char *args, int from_tty)
8507 {
8508 asection *s;
8509 struct cleanup *old_chain;
8510 gdb_byte *sectdata;
8511 const char *sectname;
8512 bfd_size_type size;
8513 bfd_vma lma;
8514 int matched = 0;
8515 int mismatched = 0;
8516 int res;
8517 int read_only = 0;
8518
8519 if (!exec_bfd)
8520 error (_("command cannot be used without an exec file"));
8521
8522 /* Make sure the remote is pointing at the right process. */
8523 set_general_process ();
8524
8525 if (args != NULL && strcmp (args, "-r") == 0)
8526 {
8527 read_only = 1;
8528 args = NULL;
8529 }
8530
8531 for (s = exec_bfd->sections; s; s = s->next)
8532 {
8533 if (!(s->flags & SEC_LOAD))
8534 continue; /* Skip non-loadable section. */
8535
8536 if (read_only && (s->flags & SEC_READONLY) == 0)
8537 continue; /* Skip writeable sections */
8538
8539 size = bfd_get_section_size (s);
8540 if (size == 0)
8541 continue; /* Skip zero-length section. */
8542
8543 sectname = bfd_get_section_name (exec_bfd, s);
8544 if (args && strcmp (args, sectname) != 0)
8545 continue; /* Not the section selected by user. */
8546
8547 matched = 1; /* Do this section. */
8548 lma = s->lma;
8549
8550 sectdata = xmalloc (size);
8551 old_chain = make_cleanup (xfree, sectdata);
8552 bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
8553
8554 res = target_verify_memory (sectdata, lma, size);
8555
8556 if (res == -1)
8557 error (_("target memory fault, section %s, range %s -- %s"), sectname,
8558 paddress (target_gdbarch (), lma),
8559 paddress (target_gdbarch (), lma + size));
8560
8561 printf_filtered ("Section %s, range %s -- %s: ", sectname,
8562 paddress (target_gdbarch (), lma),
8563 paddress (target_gdbarch (), lma + size));
8564 if (res)
8565 printf_filtered ("matched.\n");
8566 else
8567 {
8568 printf_filtered ("MIS-MATCHED!\n");
8569 mismatched++;
8570 }
8571
8572 do_cleanups (old_chain);
8573 }
8574 if (mismatched > 0)
8575 warning (_("One or more sections of the target image does not match\n\
8576 the loaded file\n"));
8577 if (args && !matched)
8578 printf_filtered (_("No loaded section named '%s'.\n"), args);
8579 }
8580
8581 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
8582 into remote target. The number of bytes written to the remote
8583 target is returned, or -1 for error. */
8584
8585 static enum target_xfer_status
8586 remote_write_qxfer (struct target_ops *ops, const char *object_name,
8587 const char *annex, const gdb_byte *writebuf,
8588 ULONGEST offset, LONGEST len, ULONGEST *xfered_len,
8589 struct packet_config *packet)
8590 {
8591 int i, buf_len;
8592 ULONGEST n;
8593 struct remote_state *rs = get_remote_state ();
8594 int max_size = get_memory_write_packet_size ();
8595
8596 if (packet->support == PACKET_DISABLE)
8597 return TARGET_XFER_E_IO;
8598
8599 /* Insert header. */
8600 i = snprintf (rs->buf, max_size,
8601 "qXfer:%s:write:%s:%s:",
8602 object_name, annex ? annex : "",
8603 phex_nz (offset, sizeof offset));
8604 max_size -= (i + 1);
8605
8606 /* Escape as much data as fits into rs->buf. */
8607 buf_len = remote_escape_output
8608 (writebuf, len, (gdb_byte *) rs->buf + i, &max_size, max_size);
8609
8610 if (putpkt_binary (rs->buf, i + buf_len) < 0
8611 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
8612 || packet_ok (rs->buf, packet) != PACKET_OK)
8613 return TARGET_XFER_E_IO;
8614
8615 unpack_varlen_hex (rs->buf, &n);
8616
8617 *xfered_len = n;
8618 return TARGET_XFER_OK;
8619 }
8620
8621 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
8622 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
8623 number of bytes read is returned, or 0 for EOF, or -1 for error.
8624 The number of bytes read may be less than LEN without indicating an
8625 EOF. PACKET is checked and updated to indicate whether the remote
8626 target supports this object. */
8627
8628 static enum target_xfer_status
8629 remote_read_qxfer (struct target_ops *ops, const char *object_name,
8630 const char *annex,
8631 gdb_byte *readbuf, ULONGEST offset, LONGEST len,
8632 ULONGEST *xfered_len,
8633 struct packet_config *packet)
8634 {
8635 struct remote_state *rs = get_remote_state ();
8636 LONGEST i, n, packet_len;
8637
8638 if (packet->support == PACKET_DISABLE)
8639 return TARGET_XFER_E_IO;
8640
8641 /* Check whether we've cached an end-of-object packet that matches
8642 this request. */
8643 if (rs->finished_object)
8644 {
8645 if (strcmp (object_name, rs->finished_object) == 0
8646 && strcmp (annex ? annex : "", rs->finished_annex) == 0
8647 && offset == rs->finished_offset)
8648 return TARGET_XFER_EOF;
8649
8650
8651 /* Otherwise, we're now reading something different. Discard
8652 the cache. */
8653 xfree (rs->finished_object);
8654 xfree (rs->finished_annex);
8655 rs->finished_object = NULL;
8656 rs->finished_annex = NULL;
8657 }
8658
8659 /* Request only enough to fit in a single packet. The actual data
8660 may not, since we don't know how much of it will need to be escaped;
8661 the target is free to respond with slightly less data. We subtract
8662 five to account for the response type and the protocol frame. */
8663 n = min (get_remote_packet_size () - 5, len);
8664 snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
8665 object_name, annex ? annex : "",
8666 phex_nz (offset, sizeof offset),
8667 phex_nz (n, sizeof n));
8668 i = putpkt (rs->buf);
8669 if (i < 0)
8670 return TARGET_XFER_E_IO;
8671
8672 rs->buf[0] = '\0';
8673 packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0);
8674 if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK)
8675 return TARGET_XFER_E_IO;
8676
8677 if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
8678 error (_("Unknown remote qXfer reply: %s"), rs->buf);
8679
8680 /* 'm' means there is (or at least might be) more data after this
8681 batch. That does not make sense unless there's at least one byte
8682 of data in this reply. */
8683 if (rs->buf[0] == 'm' && packet_len == 1)
8684 error (_("Remote qXfer reply contained no data."));
8685
8686 /* Got some data. */
8687 i = remote_unescape_input ((gdb_byte *) rs->buf + 1,
8688 packet_len - 1, readbuf, n);
8689
8690 /* 'l' is an EOF marker, possibly including a final block of data,
8691 or possibly empty. If we have the final block of a non-empty
8692 object, record this fact to bypass a subsequent partial read. */
8693 if (rs->buf[0] == 'l' && offset + i > 0)
8694 {
8695 rs->finished_object = xstrdup (object_name);
8696 rs->finished_annex = xstrdup (annex ? annex : "");
8697 rs->finished_offset = offset + i;
8698 }
8699
8700 if (i == 0)
8701 return TARGET_XFER_EOF;
8702 else
8703 {
8704 *xfered_len = i;
8705 return TARGET_XFER_OK;
8706 }
8707 }
8708
8709 static enum target_xfer_status
8710 remote_xfer_partial (struct target_ops *ops, enum target_object object,
8711 const char *annex, gdb_byte *readbuf,
8712 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
8713 ULONGEST *xfered_len)
8714 {
8715 struct remote_state *rs;
8716 int i;
8717 char *p2;
8718 char query_type;
8719
8720 set_remote_traceframe ();
8721 set_general_thread (inferior_ptid);
8722
8723 rs = get_remote_state ();
8724
8725 /* Handle memory using the standard memory routines. */
8726 if (object == TARGET_OBJECT_MEMORY)
8727 {
8728 /* If the remote target is connected but not running, we should
8729 pass this request down to a lower stratum (e.g. the executable
8730 file). */
8731 if (!target_has_execution)
8732 return TARGET_XFER_EOF;
8733
8734 if (writebuf != NULL)
8735 return remote_write_bytes (offset, writebuf, len, xfered_len);
8736 else
8737 return remote_read_bytes (ops, offset, readbuf, len, xfered_len);
8738 }
8739
8740 /* Handle SPU memory using qxfer packets. */
8741 if (object == TARGET_OBJECT_SPU)
8742 {
8743 if (readbuf)
8744 return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len,
8745 xfered_len, &remote_protocol_packets
8746 [PACKET_qXfer_spu_read]);
8747 else
8748 return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len,
8749 xfered_len, &remote_protocol_packets
8750 [PACKET_qXfer_spu_write]);
8751 }
8752
8753 /* Handle extra signal info using qxfer packets. */
8754 if (object == TARGET_OBJECT_SIGNAL_INFO)
8755 {
8756 if (readbuf)
8757 return remote_read_qxfer (ops, "siginfo", annex, readbuf, offset, len,
8758 xfered_len, &remote_protocol_packets
8759 [PACKET_qXfer_siginfo_read]);
8760 else
8761 return remote_write_qxfer (ops, "siginfo", annex,
8762 writebuf, offset, len, xfered_len,
8763 &remote_protocol_packets
8764 [PACKET_qXfer_siginfo_write]);
8765 }
8766
8767 if (object == TARGET_OBJECT_STATIC_TRACE_DATA)
8768 {
8769 if (readbuf)
8770 return remote_read_qxfer (ops, "statictrace", annex,
8771 readbuf, offset, len, xfered_len,
8772 &remote_protocol_packets
8773 [PACKET_qXfer_statictrace_read]);
8774 else
8775 return TARGET_XFER_E_IO;
8776 }
8777
8778 /* Only handle flash writes. */
8779 if (writebuf != NULL)
8780 {
8781 LONGEST xfered;
8782
8783 switch (object)
8784 {
8785 case TARGET_OBJECT_FLASH:
8786 return remote_flash_write (ops, offset, len, xfered_len,
8787 writebuf);
8788
8789 default:
8790 return TARGET_XFER_E_IO;
8791 }
8792 }
8793
8794 /* Map pre-existing objects onto letters. DO NOT do this for new
8795 objects!!! Instead specify new query packets. */
8796 switch (object)
8797 {
8798 case TARGET_OBJECT_AVR:
8799 query_type = 'R';
8800 break;
8801
8802 case TARGET_OBJECT_AUXV:
8803 gdb_assert (annex == NULL);
8804 return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len,
8805 xfered_len,
8806 &remote_protocol_packets[PACKET_qXfer_auxv]);
8807
8808 case TARGET_OBJECT_AVAILABLE_FEATURES:
8809 return remote_read_qxfer
8810 (ops, "features", annex, readbuf, offset, len, xfered_len,
8811 &remote_protocol_packets[PACKET_qXfer_features]);
8812
8813 case TARGET_OBJECT_LIBRARIES:
8814 return remote_read_qxfer
8815 (ops, "libraries", annex, readbuf, offset, len, xfered_len,
8816 &remote_protocol_packets[PACKET_qXfer_libraries]);
8817
8818 case TARGET_OBJECT_LIBRARIES_SVR4:
8819 return remote_read_qxfer
8820 (ops, "libraries-svr4", annex, readbuf, offset, len, xfered_len,
8821 &remote_protocol_packets[PACKET_qXfer_libraries_svr4]);
8822
8823 case TARGET_OBJECT_MEMORY_MAP:
8824 gdb_assert (annex == NULL);
8825 return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len,
8826 xfered_len,
8827 &remote_protocol_packets[PACKET_qXfer_memory_map]);
8828
8829 case TARGET_OBJECT_OSDATA:
8830 /* Should only get here if we're connected. */
8831 gdb_assert (rs->remote_desc);
8832 return remote_read_qxfer
8833 (ops, "osdata", annex, readbuf, offset, len, xfered_len,
8834 &remote_protocol_packets[PACKET_qXfer_osdata]);
8835
8836 case TARGET_OBJECT_THREADS:
8837 gdb_assert (annex == NULL);
8838 return remote_read_qxfer (ops, "threads", annex, readbuf, offset, len,
8839 xfered_len,
8840 &remote_protocol_packets[PACKET_qXfer_threads]);
8841
8842 case TARGET_OBJECT_TRACEFRAME_INFO:
8843 gdb_assert (annex == NULL);
8844 return remote_read_qxfer
8845 (ops, "traceframe-info", annex, readbuf, offset, len, xfered_len,
8846 &remote_protocol_packets[PACKET_qXfer_traceframe_info]);
8847
8848 case TARGET_OBJECT_FDPIC:
8849 return remote_read_qxfer (ops, "fdpic", annex, readbuf, offset, len,
8850 xfered_len,
8851 &remote_protocol_packets[PACKET_qXfer_fdpic]);
8852
8853 case TARGET_OBJECT_OPENVMS_UIB:
8854 return remote_read_qxfer (ops, "uib", annex, readbuf, offset, len,
8855 xfered_len,
8856 &remote_protocol_packets[PACKET_qXfer_uib]);
8857
8858 case TARGET_OBJECT_BTRACE:
8859 return remote_read_qxfer (ops, "btrace", annex, readbuf, offset, len,
8860 xfered_len,
8861 &remote_protocol_packets[PACKET_qXfer_btrace]);
8862
8863 default:
8864 return TARGET_XFER_E_IO;
8865 }
8866
8867 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
8868 large enough let the caller deal with it. */
8869 if (len < get_remote_packet_size ())
8870 return TARGET_XFER_E_IO;
8871 len = get_remote_packet_size ();
8872
8873 /* Except for querying the minimum buffer size, target must be open. */
8874 if (!rs->remote_desc)
8875 error (_("remote query is only available after target open"));
8876
8877 gdb_assert (annex != NULL);
8878 gdb_assert (readbuf != NULL);
8879
8880 p2 = rs->buf;
8881 *p2++ = 'q';
8882 *p2++ = query_type;
8883
8884 /* We used one buffer char for the remote protocol q command and
8885 another for the query type. As the remote protocol encapsulation
8886 uses 4 chars plus one extra in case we are debugging
8887 (remote_debug), we have PBUFZIZ - 7 left to pack the query
8888 string. */
8889 i = 0;
8890 while (annex[i] && (i < (get_remote_packet_size () - 8)))
8891 {
8892 /* Bad caller may have sent forbidden characters. */
8893 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
8894 *p2++ = annex[i];
8895 i++;
8896 }
8897 *p2 = '\0';
8898 gdb_assert (annex[i] == '\0');
8899
8900 i = putpkt (rs->buf);
8901 if (i < 0)
8902 return TARGET_XFER_E_IO;
8903
8904 getpkt (&rs->buf, &rs->buf_size, 0);
8905 strcpy ((char *) readbuf, rs->buf);
8906
8907 *xfered_len = strlen ((char *) readbuf);
8908 return TARGET_XFER_OK;
8909 }
8910
8911 static int
8912 remote_search_memory (struct target_ops* ops,
8913 CORE_ADDR start_addr, ULONGEST search_space_len,
8914 const gdb_byte *pattern, ULONGEST pattern_len,
8915 CORE_ADDR *found_addrp)
8916 {
8917 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
8918 struct remote_state *rs = get_remote_state ();
8919 int max_size = get_memory_write_packet_size ();
8920 struct packet_config *packet =
8921 &remote_protocol_packets[PACKET_qSearch_memory];
8922 /* Number of packet bytes used to encode the pattern;
8923 this could be more than PATTERN_LEN due to escape characters. */
8924 int escaped_pattern_len;
8925 /* Amount of pattern that was encodable in the packet. */
8926 int used_pattern_len;
8927 int i;
8928 int found;
8929 ULONGEST found_addr;
8930
8931 /* Don't go to the target if we don't have to.
8932 This is done before checking packet->support to avoid the possibility that
8933 a success for this edge case means the facility works in general. */
8934 if (pattern_len > search_space_len)
8935 return 0;
8936 if (pattern_len == 0)
8937 {
8938 *found_addrp = start_addr;
8939 return 1;
8940 }
8941
8942 /* If we already know the packet isn't supported, fall back to the simple
8943 way of searching memory. */
8944
8945 if (packet_config_support (packet) == PACKET_DISABLE)
8946 {
8947 /* Target doesn't provided special support, fall back and use the
8948 standard support (copy memory and do the search here). */
8949 return simple_search_memory (ops, start_addr, search_space_len,
8950 pattern, pattern_len, found_addrp);
8951 }
8952
8953 /* Make sure the remote is pointing at the right process. */
8954 set_general_process ();
8955
8956 /* Insert header. */
8957 i = snprintf (rs->buf, max_size,
8958 "qSearch:memory:%s;%s;",
8959 phex_nz (start_addr, addr_size),
8960 phex_nz (search_space_len, sizeof (search_space_len)));
8961 max_size -= (i + 1);
8962
8963 /* Escape as much data as fits into rs->buf. */
8964 escaped_pattern_len =
8965 remote_escape_output (pattern, pattern_len, (gdb_byte *) rs->buf + i,
8966 &used_pattern_len, max_size);
8967
8968 /* Bail if the pattern is too large. */
8969 if (used_pattern_len != pattern_len)
8970 error (_("Pattern is too large to transmit to remote target."));
8971
8972 if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0
8973 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
8974 || packet_ok (rs->buf, packet) != PACKET_OK)
8975 {
8976 /* The request may not have worked because the command is not
8977 supported. If so, fall back to the simple way. */
8978 if (packet->support == PACKET_DISABLE)
8979 {
8980 return simple_search_memory (ops, start_addr, search_space_len,
8981 pattern, pattern_len, found_addrp);
8982 }
8983 return -1;
8984 }
8985
8986 if (rs->buf[0] == '0')
8987 found = 0;
8988 else if (rs->buf[0] == '1')
8989 {
8990 found = 1;
8991 if (rs->buf[1] != ',')
8992 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
8993 unpack_varlen_hex (rs->buf + 2, &found_addr);
8994 *found_addrp = found_addr;
8995 }
8996 else
8997 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
8998
8999 return found;
9000 }
9001
9002 static void
9003 remote_rcmd (struct target_ops *self, const char *command,
9004 struct ui_file *outbuf)
9005 {
9006 struct remote_state *rs = get_remote_state ();
9007 char *p = rs->buf;
9008
9009 if (!rs->remote_desc)
9010 error (_("remote rcmd is only available after target open"));
9011
9012 /* Send a NULL command across as an empty command. */
9013 if (command == NULL)
9014 command = "";
9015
9016 /* The query prefix. */
9017 strcpy (rs->buf, "qRcmd,");
9018 p = strchr (rs->buf, '\0');
9019
9020 if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/)
9021 > get_remote_packet_size ())
9022 error (_("\"monitor\" command ``%s'' is too long."), command);
9023
9024 /* Encode the actual command. */
9025 bin2hex ((const gdb_byte *) command, p, strlen (command));
9026
9027 if (putpkt (rs->buf) < 0)
9028 error (_("Communication problem with target."));
9029
9030 /* get/display the response */
9031 while (1)
9032 {
9033 char *buf;
9034
9035 /* XXX - see also remote_get_noisy_reply(). */
9036 QUIT; /* Allow user to bail out with ^C. */
9037 rs->buf[0] = '\0';
9038 if (getpkt_sane (&rs->buf, &rs->buf_size, 0) == -1)
9039 {
9040 /* Timeout. Continue to (try to) read responses.
9041 This is better than stopping with an error, assuming the stub
9042 is still executing the (long) monitor command.
9043 If needed, the user can interrupt gdb using C-c, obtaining
9044 an effect similar to stop on timeout. */
9045 continue;
9046 }
9047 buf = rs->buf;
9048 if (buf[0] == '\0')
9049 error (_("Target does not support this command."));
9050 if (buf[0] == 'O' && buf[1] != 'K')
9051 {
9052 remote_console_output (buf + 1); /* 'O' message from stub. */
9053 continue;
9054 }
9055 if (strcmp (buf, "OK") == 0)
9056 break;
9057 if (strlen (buf) == 3 && buf[0] == 'E'
9058 && isdigit (buf[1]) && isdigit (buf[2]))
9059 {
9060 error (_("Protocol error with Rcmd"));
9061 }
9062 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
9063 {
9064 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
9065
9066 fputc_unfiltered (c, outbuf);
9067 }
9068 break;
9069 }
9070 }
9071
9072 static VEC(mem_region_s) *
9073 remote_memory_map (struct target_ops *ops)
9074 {
9075 VEC(mem_region_s) *result = NULL;
9076 char *text = target_read_stralloc (&current_target,
9077 TARGET_OBJECT_MEMORY_MAP, NULL);
9078
9079 if (text)
9080 {
9081 struct cleanup *back_to = make_cleanup (xfree, text);
9082
9083 result = parse_memory_map (text);
9084 do_cleanups (back_to);
9085 }
9086
9087 return result;
9088 }
9089
9090 static void
9091 packet_command (char *args, int from_tty)
9092 {
9093 struct remote_state *rs = get_remote_state ();
9094
9095 if (!rs->remote_desc)
9096 error (_("command can only be used with remote target"));
9097
9098 if (!args)
9099 error (_("remote-packet command requires packet text as argument"));
9100
9101 puts_filtered ("sending: ");
9102 print_packet (args);
9103 puts_filtered ("\n");
9104 putpkt (args);
9105
9106 getpkt (&rs->buf, &rs->buf_size, 0);
9107 puts_filtered ("received: ");
9108 print_packet (rs->buf);
9109 puts_filtered ("\n");
9110 }
9111
9112 #if 0
9113 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
9114
9115 static void display_thread_info (struct gdb_ext_thread_info *info);
9116
9117 static void threadset_test_cmd (char *cmd, int tty);
9118
9119 static void threadalive_test (char *cmd, int tty);
9120
9121 static void threadlist_test_cmd (char *cmd, int tty);
9122
9123 int get_and_display_threadinfo (threadref *ref);
9124
9125 static void threadinfo_test_cmd (char *cmd, int tty);
9126
9127 static int thread_display_step (threadref *ref, void *context);
9128
9129 static void threadlist_update_test_cmd (char *cmd, int tty);
9130
9131 static void init_remote_threadtests (void);
9132
9133 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
9134
9135 static void
9136 threadset_test_cmd (char *cmd, int tty)
9137 {
9138 int sample_thread = SAMPLE_THREAD;
9139
9140 printf_filtered (_("Remote threadset test\n"));
9141 set_general_thread (sample_thread);
9142 }
9143
9144
9145 static void
9146 threadalive_test (char *cmd, int tty)
9147 {
9148 int sample_thread = SAMPLE_THREAD;
9149 int pid = ptid_get_pid (inferior_ptid);
9150 ptid_t ptid = ptid_build (pid, sample_thread, 0);
9151
9152 if (remote_thread_alive (ptid))
9153 printf_filtered ("PASS: Thread alive test\n");
9154 else
9155 printf_filtered ("FAIL: Thread alive test\n");
9156 }
9157
9158 void output_threadid (char *title, threadref *ref);
9159
9160 void
9161 output_threadid (char *title, threadref *ref)
9162 {
9163 char hexid[20];
9164
9165 pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
9166 hexid[16] = 0;
9167 printf_filtered ("%s %s\n", title, (&hexid[0]));
9168 }
9169
9170 static void
9171 threadlist_test_cmd (char *cmd, int tty)
9172 {
9173 int startflag = 1;
9174 threadref nextthread;
9175 int done, result_count;
9176 threadref threadlist[3];
9177
9178 printf_filtered ("Remote Threadlist test\n");
9179 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
9180 &result_count, &threadlist[0]))
9181 printf_filtered ("FAIL: threadlist test\n");
9182 else
9183 {
9184 threadref *scan = threadlist;
9185 threadref *limit = scan + result_count;
9186
9187 while (scan < limit)
9188 output_threadid (" thread ", scan++);
9189 }
9190 }
9191
9192 void
9193 display_thread_info (struct gdb_ext_thread_info *info)
9194 {
9195 output_threadid ("Threadid: ", &info->threadid);
9196 printf_filtered ("Name: %s\n ", info->shortname);
9197 printf_filtered ("State: %s\n", info->display);
9198 printf_filtered ("other: %s\n\n", info->more_display);
9199 }
9200
9201 int
9202 get_and_display_threadinfo (threadref *ref)
9203 {
9204 int result;
9205 int set;
9206 struct gdb_ext_thread_info threadinfo;
9207
9208 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
9209 | TAG_MOREDISPLAY | TAG_DISPLAY;
9210 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
9211 display_thread_info (&threadinfo);
9212 return result;
9213 }
9214
9215 static void
9216 threadinfo_test_cmd (char *cmd, int tty)
9217 {
9218 int athread = SAMPLE_THREAD;
9219 threadref thread;
9220 int set;
9221
9222 int_to_threadref (&thread, athread);
9223 printf_filtered ("Remote Threadinfo test\n");
9224 if (!get_and_display_threadinfo (&thread))
9225 printf_filtered ("FAIL cannot get thread info\n");
9226 }
9227
9228 static int
9229 thread_display_step (threadref *ref, void *context)
9230 {
9231 /* output_threadid(" threadstep ",ref); *//* simple test */
9232 return get_and_display_threadinfo (ref);
9233 }
9234
9235 static void
9236 threadlist_update_test_cmd (char *cmd, int tty)
9237 {
9238 printf_filtered ("Remote Threadlist update test\n");
9239 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
9240 }
9241
9242 static void
9243 init_remote_threadtests (void)
9244 {
9245 add_com ("tlist", class_obscure, threadlist_test_cmd,
9246 _("Fetch and print the remote list of "
9247 "thread identifiers, one pkt only"));
9248 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
9249 _("Fetch and display info about one thread"));
9250 add_com ("tset", class_obscure, threadset_test_cmd,
9251 _("Test setting to a different thread"));
9252 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
9253 _("Iterate through updating all remote thread info"));
9254 add_com ("talive", class_obscure, threadalive_test,
9255 _(" Remote thread alive test "));
9256 }
9257
9258 #endif /* 0 */
9259
9260 /* Convert a thread ID to a string. Returns the string in a static
9261 buffer. */
9262
9263 static char *
9264 remote_pid_to_str (struct target_ops *ops, ptid_t ptid)
9265 {
9266 static char buf[64];
9267 struct remote_state *rs = get_remote_state ();
9268
9269 if (ptid_equal (ptid, null_ptid))
9270 return normal_pid_to_str (ptid);
9271 else if (ptid_is_pid (ptid))
9272 {
9273 /* Printing an inferior target id. */
9274
9275 /* When multi-process extensions are off, there's no way in the
9276 remote protocol to know the remote process id, if there's any
9277 at all. There's one exception --- when we're connected with
9278 target extended-remote, and we manually attached to a process
9279 with "attach PID". We don't record anywhere a flag that
9280 allows us to distinguish that case from the case of
9281 connecting with extended-remote and the stub already being
9282 attached to a process, and reporting yes to qAttached, hence
9283 no smart special casing here. */
9284 if (!remote_multi_process_p (rs))
9285 {
9286 xsnprintf (buf, sizeof buf, "Remote target");
9287 return buf;
9288 }
9289
9290 return normal_pid_to_str (ptid);
9291 }
9292 else
9293 {
9294 if (ptid_equal (magic_null_ptid, ptid))
9295 xsnprintf (buf, sizeof buf, "Thread <main>");
9296 else if (rs->extended && remote_multi_process_p (rs))
9297 xsnprintf (buf, sizeof buf, "Thread %d.%ld",
9298 ptid_get_pid (ptid), ptid_get_lwp (ptid));
9299 else
9300 xsnprintf (buf, sizeof buf, "Thread %ld",
9301 ptid_get_lwp (ptid));
9302 return buf;
9303 }
9304 }
9305
9306 /* Get the address of the thread local variable in OBJFILE which is
9307 stored at OFFSET within the thread local storage for thread PTID. */
9308
9309 static CORE_ADDR
9310 remote_get_thread_local_address (struct target_ops *ops,
9311 ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset)
9312 {
9313 if (packet_support (PACKET_qGetTLSAddr) != PACKET_DISABLE)
9314 {
9315 struct remote_state *rs = get_remote_state ();
9316 char *p = rs->buf;
9317 char *endp = rs->buf + get_remote_packet_size ();
9318 enum packet_result result;
9319
9320 strcpy (p, "qGetTLSAddr:");
9321 p += strlen (p);
9322 p = write_ptid (p, endp, ptid);
9323 *p++ = ',';
9324 p += hexnumstr (p, offset);
9325 *p++ = ',';
9326 p += hexnumstr (p, lm);
9327 *p++ = '\0';
9328
9329 putpkt (rs->buf);
9330 getpkt (&rs->buf, &rs->buf_size, 0);
9331 result = packet_ok (rs->buf,
9332 &remote_protocol_packets[PACKET_qGetTLSAddr]);
9333 if (result == PACKET_OK)
9334 {
9335 ULONGEST result;
9336
9337 unpack_varlen_hex (rs->buf, &result);
9338 return result;
9339 }
9340 else if (result == PACKET_UNKNOWN)
9341 throw_error (TLS_GENERIC_ERROR,
9342 _("Remote target doesn't support qGetTLSAddr packet"));
9343 else
9344 throw_error (TLS_GENERIC_ERROR,
9345 _("Remote target failed to process qGetTLSAddr request"));
9346 }
9347 else
9348 throw_error (TLS_GENERIC_ERROR,
9349 _("TLS not supported or disabled on this target"));
9350 /* Not reached. */
9351 return 0;
9352 }
9353
9354 /* Provide thread local base, i.e. Thread Information Block address.
9355 Returns 1 if ptid is found and thread_local_base is non zero. */
9356
9357 static int
9358 remote_get_tib_address (struct target_ops *self, ptid_t ptid, CORE_ADDR *addr)
9359 {
9360 if (packet_support (PACKET_qGetTIBAddr) != PACKET_DISABLE)
9361 {
9362 struct remote_state *rs = get_remote_state ();
9363 char *p = rs->buf;
9364 char *endp = rs->buf + get_remote_packet_size ();
9365 enum packet_result result;
9366
9367 strcpy (p, "qGetTIBAddr:");
9368 p += strlen (p);
9369 p = write_ptid (p, endp, ptid);
9370 *p++ = '\0';
9371
9372 putpkt (rs->buf);
9373 getpkt (&rs->buf, &rs->buf_size, 0);
9374 result = packet_ok (rs->buf,
9375 &remote_protocol_packets[PACKET_qGetTIBAddr]);
9376 if (result == PACKET_OK)
9377 {
9378 ULONGEST result;
9379
9380 unpack_varlen_hex (rs->buf, &result);
9381 if (addr)
9382 *addr = (CORE_ADDR) result;
9383 return 1;
9384 }
9385 else if (result == PACKET_UNKNOWN)
9386 error (_("Remote target doesn't support qGetTIBAddr packet"));
9387 else
9388 error (_("Remote target failed to process qGetTIBAddr request"));
9389 }
9390 else
9391 error (_("qGetTIBAddr not supported or disabled on this target"));
9392 /* Not reached. */
9393 return 0;
9394 }
9395
9396 /* Support for inferring a target description based on the current
9397 architecture and the size of a 'g' packet. While the 'g' packet
9398 can have any size (since optional registers can be left off the
9399 end), some sizes are easily recognizable given knowledge of the
9400 approximate architecture. */
9401
9402 struct remote_g_packet_guess
9403 {
9404 int bytes;
9405 const struct target_desc *tdesc;
9406 };
9407 typedef struct remote_g_packet_guess remote_g_packet_guess_s;
9408 DEF_VEC_O(remote_g_packet_guess_s);
9409
9410 struct remote_g_packet_data
9411 {
9412 VEC(remote_g_packet_guess_s) *guesses;
9413 };
9414
9415 static struct gdbarch_data *remote_g_packet_data_handle;
9416
9417 static void *
9418 remote_g_packet_data_init (struct obstack *obstack)
9419 {
9420 return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data);
9421 }
9422
9423 void
9424 register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
9425 const struct target_desc *tdesc)
9426 {
9427 struct remote_g_packet_data *data
9428 = gdbarch_data (gdbarch, remote_g_packet_data_handle);
9429 struct remote_g_packet_guess new_guess, *guess;
9430 int ix;
9431
9432 gdb_assert (tdesc != NULL);
9433
9434 for (ix = 0;
9435 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
9436 ix++)
9437 if (guess->bytes == bytes)
9438 internal_error (__FILE__, __LINE__,
9439 _("Duplicate g packet description added for size %d"),
9440 bytes);
9441
9442 new_guess.bytes = bytes;
9443 new_guess.tdesc = tdesc;
9444 VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess);
9445 }
9446
9447 /* Return 1 if remote_read_description would do anything on this target
9448 and architecture, 0 otherwise. */
9449
9450 static int
9451 remote_read_description_p (struct target_ops *target)
9452 {
9453 struct remote_g_packet_data *data
9454 = gdbarch_data (target_gdbarch (), remote_g_packet_data_handle);
9455
9456 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
9457 return 1;
9458
9459 return 0;
9460 }
9461
9462 static const struct target_desc *
9463 remote_read_description (struct target_ops *target)
9464 {
9465 struct remote_g_packet_data *data
9466 = gdbarch_data (target_gdbarch (), remote_g_packet_data_handle);
9467
9468 /* Do not try this during initial connection, when we do not know
9469 whether there is a running but stopped thread. */
9470 if (!target_has_execution || ptid_equal (inferior_ptid, null_ptid))
9471 return target->beneath->to_read_description (target->beneath);
9472
9473 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
9474 {
9475 struct remote_g_packet_guess *guess;
9476 int ix;
9477 int bytes = send_g_packet ();
9478
9479 for (ix = 0;
9480 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
9481 ix++)
9482 if (guess->bytes == bytes)
9483 return guess->tdesc;
9484
9485 /* We discard the g packet. A minor optimization would be to
9486 hold on to it, and fill the register cache once we have selected
9487 an architecture, but it's too tricky to do safely. */
9488 }
9489
9490 return target->beneath->to_read_description (target->beneath);
9491 }
9492
9493 /* Remote file transfer support. This is host-initiated I/O, not
9494 target-initiated; for target-initiated, see remote-fileio.c. */
9495
9496 /* If *LEFT is at least the length of STRING, copy STRING to
9497 *BUFFER, update *BUFFER to point to the new end of the buffer, and
9498 decrease *LEFT. Otherwise raise an error. */
9499
9500 static void
9501 remote_buffer_add_string (char **buffer, int *left, char *string)
9502 {
9503 int len = strlen (string);
9504
9505 if (len > *left)
9506 error (_("Packet too long for target."));
9507
9508 memcpy (*buffer, string, len);
9509 *buffer += len;
9510 *left -= len;
9511
9512 /* NUL-terminate the buffer as a convenience, if there is
9513 room. */
9514 if (*left)
9515 **buffer = '\0';
9516 }
9517
9518 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
9519 *BUFFER, update *BUFFER to point to the new end of the buffer, and
9520 decrease *LEFT. Otherwise raise an error. */
9521
9522 static void
9523 remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
9524 int len)
9525 {
9526 if (2 * len > *left)
9527 error (_("Packet too long for target."));
9528
9529 bin2hex (bytes, *buffer, len);
9530 *buffer += 2 * len;
9531 *left -= 2 * len;
9532
9533 /* NUL-terminate the buffer as a convenience, if there is
9534 room. */
9535 if (*left)
9536 **buffer = '\0';
9537 }
9538
9539 /* If *LEFT is large enough, convert VALUE to hex and add it to
9540 *BUFFER, update *BUFFER to point to the new end of the buffer, and
9541 decrease *LEFT. Otherwise raise an error. */
9542
9543 static void
9544 remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
9545 {
9546 int len = hexnumlen (value);
9547
9548 if (len > *left)
9549 error (_("Packet too long for target."));
9550
9551 hexnumstr (*buffer, value);
9552 *buffer += len;
9553 *left -= len;
9554
9555 /* NUL-terminate the buffer as a convenience, if there is
9556 room. */
9557 if (*left)
9558 **buffer = '\0';
9559 }
9560
9561 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
9562 value, *REMOTE_ERRNO to the remote error number or zero if none
9563 was included, and *ATTACHMENT to point to the start of the annex
9564 if any. The length of the packet isn't needed here; there may
9565 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
9566
9567 Return 0 if the packet could be parsed, -1 if it could not. If
9568 -1 is returned, the other variables may not be initialized. */
9569
9570 static int
9571 remote_hostio_parse_result (char *buffer, int *retcode,
9572 int *remote_errno, char **attachment)
9573 {
9574 char *p, *p2;
9575
9576 *remote_errno = 0;
9577 *attachment = NULL;
9578
9579 if (buffer[0] != 'F')
9580 return -1;
9581
9582 errno = 0;
9583 *retcode = strtol (&buffer[1], &p, 16);
9584 if (errno != 0 || p == &buffer[1])
9585 return -1;
9586
9587 /* Check for ",errno". */
9588 if (*p == ',')
9589 {
9590 errno = 0;
9591 *remote_errno = strtol (p + 1, &p2, 16);
9592 if (errno != 0 || p + 1 == p2)
9593 return -1;
9594 p = p2;
9595 }
9596
9597 /* Check for ";attachment". If there is no attachment, the
9598 packet should end here. */
9599 if (*p == ';')
9600 {
9601 *attachment = p + 1;
9602 return 0;
9603 }
9604 else if (*p == '\0')
9605 return 0;
9606 else
9607 return -1;
9608 }
9609
9610 /* Send a prepared I/O packet to the target and read its response.
9611 The prepared packet is in the global RS->BUF before this function
9612 is called, and the answer is there when we return.
9613
9614 COMMAND_BYTES is the length of the request to send, which may include
9615 binary data. WHICH_PACKET is the packet configuration to check
9616 before attempting a packet. If an error occurs, *REMOTE_ERRNO
9617 is set to the error number and -1 is returned. Otherwise the value
9618 returned by the function is returned.
9619
9620 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
9621 attachment is expected; an error will be reported if there's a
9622 mismatch. If one is found, *ATTACHMENT will be set to point into
9623 the packet buffer and *ATTACHMENT_LEN will be set to the
9624 attachment's length. */
9625
9626 static int
9627 remote_hostio_send_command (int command_bytes, int which_packet,
9628 int *remote_errno, char **attachment,
9629 int *attachment_len)
9630 {
9631 struct remote_state *rs = get_remote_state ();
9632 int ret, bytes_read;
9633 char *attachment_tmp;
9634
9635 if (!rs->remote_desc
9636 || packet_support (which_packet) == PACKET_DISABLE)
9637 {
9638 *remote_errno = FILEIO_ENOSYS;
9639 return -1;
9640 }
9641
9642 putpkt_binary (rs->buf, command_bytes);
9643 bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0);
9644
9645 /* If it timed out, something is wrong. Don't try to parse the
9646 buffer. */
9647 if (bytes_read < 0)
9648 {
9649 *remote_errno = FILEIO_EINVAL;
9650 return -1;
9651 }
9652
9653 switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
9654 {
9655 case PACKET_ERROR:
9656 *remote_errno = FILEIO_EINVAL;
9657 return -1;
9658 case PACKET_UNKNOWN:
9659 *remote_errno = FILEIO_ENOSYS;
9660 return -1;
9661 case PACKET_OK:
9662 break;
9663 }
9664
9665 if (remote_hostio_parse_result (rs->buf, &ret, remote_errno,
9666 &attachment_tmp))
9667 {
9668 *remote_errno = FILEIO_EINVAL;
9669 return -1;
9670 }
9671
9672 /* Make sure we saw an attachment if and only if we expected one. */
9673 if ((attachment_tmp == NULL && attachment != NULL)
9674 || (attachment_tmp != NULL && attachment == NULL))
9675 {
9676 *remote_errno = FILEIO_EINVAL;
9677 return -1;
9678 }
9679
9680 /* If an attachment was found, it must point into the packet buffer;
9681 work out how many bytes there were. */
9682 if (attachment_tmp != NULL)
9683 {
9684 *attachment = attachment_tmp;
9685 *attachment_len = bytes_read - (*attachment - rs->buf);
9686 }
9687
9688 return ret;
9689 }
9690
9691 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
9692 remote file descriptor, or -1 if an error occurs (and set
9693 *REMOTE_ERRNO). */
9694
9695 static int
9696 remote_hostio_open (struct target_ops *self,
9697 const char *filename, int flags, int mode,
9698 int *remote_errno)
9699 {
9700 struct remote_state *rs = get_remote_state ();
9701 char *p = rs->buf;
9702 int left = get_remote_packet_size () - 1;
9703
9704 remote_buffer_add_string (&p, &left, "vFile:open:");
9705
9706 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
9707 strlen (filename));
9708 remote_buffer_add_string (&p, &left, ",");
9709
9710 remote_buffer_add_int (&p, &left, flags);
9711 remote_buffer_add_string (&p, &left, ",");
9712
9713 remote_buffer_add_int (&p, &left, mode);
9714
9715 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open,
9716 remote_errno, NULL, NULL);
9717 }
9718
9719 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
9720 Return the number of bytes written, or -1 if an error occurs (and
9721 set *REMOTE_ERRNO). */
9722
9723 static int
9724 remote_hostio_pwrite (struct target_ops *self,
9725 int fd, const gdb_byte *write_buf, int len,
9726 ULONGEST offset, int *remote_errno)
9727 {
9728 struct remote_state *rs = get_remote_state ();
9729 char *p = rs->buf;
9730 int left = get_remote_packet_size ();
9731 int out_len;
9732
9733 remote_buffer_add_string (&p, &left, "vFile:pwrite:");
9734
9735 remote_buffer_add_int (&p, &left, fd);
9736 remote_buffer_add_string (&p, &left, ",");
9737
9738 remote_buffer_add_int (&p, &left, offset);
9739 remote_buffer_add_string (&p, &left, ",");
9740
9741 p += remote_escape_output (write_buf, len, (gdb_byte *) p, &out_len,
9742 get_remote_packet_size () - (p - rs->buf));
9743
9744 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite,
9745 remote_errno, NULL, NULL);
9746 }
9747
9748 /* Read up to LEN bytes FD on the remote target into READ_BUF
9749 Return the number of bytes read, or -1 if an error occurs (and
9750 set *REMOTE_ERRNO). */
9751
9752 static int
9753 remote_hostio_pread (struct target_ops *self,
9754 int fd, gdb_byte *read_buf, int len,
9755 ULONGEST offset, int *remote_errno)
9756 {
9757 struct remote_state *rs = get_remote_state ();
9758 char *p = rs->buf;
9759 char *attachment;
9760 int left = get_remote_packet_size ();
9761 int ret, attachment_len;
9762 int read_len;
9763
9764 remote_buffer_add_string (&p, &left, "vFile:pread:");
9765
9766 remote_buffer_add_int (&p, &left, fd);
9767 remote_buffer_add_string (&p, &left, ",");
9768
9769 remote_buffer_add_int (&p, &left, len);
9770 remote_buffer_add_string (&p, &left, ",");
9771
9772 remote_buffer_add_int (&p, &left, offset);
9773
9774 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread,
9775 remote_errno, &attachment,
9776 &attachment_len);
9777
9778 if (ret < 0)
9779 return ret;
9780
9781 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
9782 read_buf, len);
9783 if (read_len != ret)
9784 error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
9785
9786 return ret;
9787 }
9788
9789 /* Close FD on the remote target. Return 0, or -1 if an error occurs
9790 (and set *REMOTE_ERRNO). */
9791
9792 static int
9793 remote_hostio_close (struct target_ops *self, int fd, int *remote_errno)
9794 {
9795 struct remote_state *rs = get_remote_state ();
9796 char *p = rs->buf;
9797 int left = get_remote_packet_size () - 1;
9798
9799 remote_buffer_add_string (&p, &left, "vFile:close:");
9800
9801 remote_buffer_add_int (&p, &left, fd);
9802
9803 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close,
9804 remote_errno, NULL, NULL);
9805 }
9806
9807 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
9808 occurs (and set *REMOTE_ERRNO). */
9809
9810 static int
9811 remote_hostio_unlink (struct target_ops *self,
9812 const char *filename, int *remote_errno)
9813 {
9814 struct remote_state *rs = get_remote_state ();
9815 char *p = rs->buf;
9816 int left = get_remote_packet_size () - 1;
9817
9818 remote_buffer_add_string (&p, &left, "vFile:unlink:");
9819
9820 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
9821 strlen (filename));
9822
9823 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink,
9824 remote_errno, NULL, NULL);
9825 }
9826
9827 /* Read value of symbolic link FILENAME on the remote target. Return
9828 a null-terminated string allocated via xmalloc, or NULL if an error
9829 occurs (and set *REMOTE_ERRNO). */
9830
9831 static char *
9832 remote_hostio_readlink (struct target_ops *self,
9833 const char *filename, int *remote_errno)
9834 {
9835 struct remote_state *rs = get_remote_state ();
9836 char *p = rs->buf;
9837 char *attachment;
9838 int left = get_remote_packet_size ();
9839 int len, attachment_len;
9840 int read_len;
9841 char *ret;
9842
9843 remote_buffer_add_string (&p, &left, "vFile:readlink:");
9844
9845 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
9846 strlen (filename));
9847
9848 len = remote_hostio_send_command (p - rs->buf, PACKET_vFile_readlink,
9849 remote_errno, &attachment,
9850 &attachment_len);
9851
9852 if (len < 0)
9853 return NULL;
9854
9855 ret = xmalloc (len + 1);
9856
9857 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
9858 (gdb_byte *) ret, len);
9859 if (read_len != len)
9860 error (_("Readlink returned %d, but %d bytes."), len, read_len);
9861
9862 ret[len] = '\0';
9863 return ret;
9864 }
9865
9866 static int
9867 remote_fileio_errno_to_host (int errnum)
9868 {
9869 switch (errnum)
9870 {
9871 case FILEIO_EPERM:
9872 return EPERM;
9873 case FILEIO_ENOENT:
9874 return ENOENT;
9875 case FILEIO_EINTR:
9876 return EINTR;
9877 case FILEIO_EIO:
9878 return EIO;
9879 case FILEIO_EBADF:
9880 return EBADF;
9881 case FILEIO_EACCES:
9882 return EACCES;
9883 case FILEIO_EFAULT:
9884 return EFAULT;
9885 case FILEIO_EBUSY:
9886 return EBUSY;
9887 case FILEIO_EEXIST:
9888 return EEXIST;
9889 case FILEIO_ENODEV:
9890 return ENODEV;
9891 case FILEIO_ENOTDIR:
9892 return ENOTDIR;
9893 case FILEIO_EISDIR:
9894 return EISDIR;
9895 case FILEIO_EINVAL:
9896 return EINVAL;
9897 case FILEIO_ENFILE:
9898 return ENFILE;
9899 case FILEIO_EMFILE:
9900 return EMFILE;
9901 case FILEIO_EFBIG:
9902 return EFBIG;
9903 case FILEIO_ENOSPC:
9904 return ENOSPC;
9905 case FILEIO_ESPIPE:
9906 return ESPIPE;
9907 case FILEIO_EROFS:
9908 return EROFS;
9909 case FILEIO_ENOSYS:
9910 return ENOSYS;
9911 case FILEIO_ENAMETOOLONG:
9912 return ENAMETOOLONG;
9913 }
9914 return -1;
9915 }
9916
9917 static char *
9918 remote_hostio_error (int errnum)
9919 {
9920 int host_error = remote_fileio_errno_to_host (errnum);
9921
9922 if (host_error == -1)
9923 error (_("Unknown remote I/O error %d"), errnum);
9924 else
9925 error (_("Remote I/O error: %s"), safe_strerror (host_error));
9926 }
9927
9928 static void
9929 remote_hostio_close_cleanup (void *opaque)
9930 {
9931 int fd = *(int *) opaque;
9932 int remote_errno;
9933
9934 remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno);
9935 }
9936
9937
9938 static void *
9939 remote_bfd_iovec_open (struct bfd *abfd, void *open_closure)
9940 {
9941 const char *filename = bfd_get_filename (abfd);
9942 int fd, remote_errno;
9943 int *stream;
9944
9945 gdb_assert (remote_filename_p (filename));
9946
9947 fd = remote_hostio_open (find_target_at (process_stratum),
9948 filename + 7, FILEIO_O_RDONLY, 0, &remote_errno);
9949 if (fd == -1)
9950 {
9951 errno = remote_fileio_errno_to_host (remote_errno);
9952 bfd_set_error (bfd_error_system_call);
9953 return NULL;
9954 }
9955
9956 stream = xmalloc (sizeof (int));
9957 *stream = fd;
9958 return stream;
9959 }
9960
9961 static int
9962 remote_bfd_iovec_close (struct bfd *abfd, void *stream)
9963 {
9964 int fd = *(int *)stream;
9965 int remote_errno;
9966
9967 xfree (stream);
9968
9969 /* Ignore errors on close; these may happen if the remote
9970 connection was already torn down. */
9971 remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno);
9972
9973 /* Zero means success. */
9974 return 0;
9975 }
9976
9977 static file_ptr
9978 remote_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf,
9979 file_ptr nbytes, file_ptr offset)
9980 {
9981 int fd = *(int *)stream;
9982 int remote_errno;
9983 file_ptr pos, bytes;
9984
9985 pos = 0;
9986 while (nbytes > pos)
9987 {
9988 bytes = remote_hostio_pread (find_target_at (process_stratum),
9989 fd, (gdb_byte *) buf + pos, nbytes - pos,
9990 offset + pos, &remote_errno);
9991 if (bytes == 0)
9992 /* Success, but no bytes, means end-of-file. */
9993 break;
9994 if (bytes == -1)
9995 {
9996 errno = remote_fileio_errno_to_host (remote_errno);
9997 bfd_set_error (bfd_error_system_call);
9998 return -1;
9999 }
10000
10001 pos += bytes;
10002 }
10003
10004 return pos;
10005 }
10006
10007 static int
10008 remote_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb)
10009 {
10010 /* FIXME: We should probably implement remote_hostio_stat. */
10011 sb->st_size = INT_MAX;
10012 return 0;
10013 }
10014
10015 int
10016 remote_filename_p (const char *filename)
10017 {
10018 return strncmp (filename,
10019 REMOTE_SYSROOT_PREFIX,
10020 sizeof (REMOTE_SYSROOT_PREFIX) - 1) == 0;
10021 }
10022
10023 bfd *
10024 remote_bfd_open (const char *remote_file, const char *target)
10025 {
10026 bfd *abfd = gdb_bfd_openr_iovec (remote_file, target,
10027 remote_bfd_iovec_open, NULL,
10028 remote_bfd_iovec_pread,
10029 remote_bfd_iovec_close,
10030 remote_bfd_iovec_stat);
10031
10032 return abfd;
10033 }
10034
10035 void
10036 remote_file_put (const char *local_file, const char *remote_file, int from_tty)
10037 {
10038 struct cleanup *back_to, *close_cleanup;
10039 int retcode, fd, remote_errno, bytes, io_size;
10040 FILE *file;
10041 gdb_byte *buffer;
10042 int bytes_in_buffer;
10043 int saw_eof;
10044 ULONGEST offset;
10045 struct remote_state *rs = get_remote_state ();
10046
10047 if (!rs->remote_desc)
10048 error (_("command can only be used with remote target"));
10049
10050 file = gdb_fopen_cloexec (local_file, "rb");
10051 if (file == NULL)
10052 perror_with_name (local_file);
10053 back_to = make_cleanup_fclose (file);
10054
10055 fd = remote_hostio_open (find_target_at (process_stratum),
10056 remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
10057 | FILEIO_O_TRUNC),
10058 0700, &remote_errno);
10059 if (fd == -1)
10060 remote_hostio_error (remote_errno);
10061
10062 /* Send up to this many bytes at once. They won't all fit in the
10063 remote packet limit, so we'll transfer slightly fewer. */
10064 io_size = get_remote_packet_size ();
10065 buffer = xmalloc (io_size);
10066 make_cleanup (xfree, buffer);
10067
10068 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
10069
10070 bytes_in_buffer = 0;
10071 saw_eof = 0;
10072 offset = 0;
10073 while (bytes_in_buffer || !saw_eof)
10074 {
10075 if (!saw_eof)
10076 {
10077 bytes = fread (buffer + bytes_in_buffer, 1,
10078 io_size - bytes_in_buffer,
10079 file);
10080 if (bytes == 0)
10081 {
10082 if (ferror (file))
10083 error (_("Error reading %s."), local_file);
10084 else
10085 {
10086 /* EOF. Unless there is something still in the
10087 buffer from the last iteration, we are done. */
10088 saw_eof = 1;
10089 if (bytes_in_buffer == 0)
10090 break;
10091 }
10092 }
10093 }
10094 else
10095 bytes = 0;
10096
10097 bytes += bytes_in_buffer;
10098 bytes_in_buffer = 0;
10099
10100 retcode = remote_hostio_pwrite (find_target_at (process_stratum),
10101 fd, buffer, bytes,
10102 offset, &remote_errno);
10103
10104 if (retcode < 0)
10105 remote_hostio_error (remote_errno);
10106 else if (retcode == 0)
10107 error (_("Remote write of %d bytes returned 0!"), bytes);
10108 else if (retcode < bytes)
10109 {
10110 /* Short write. Save the rest of the read data for the next
10111 write. */
10112 bytes_in_buffer = bytes - retcode;
10113 memmove (buffer, buffer + retcode, bytes_in_buffer);
10114 }
10115
10116 offset += retcode;
10117 }
10118
10119 discard_cleanups (close_cleanup);
10120 if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno))
10121 remote_hostio_error (remote_errno);
10122
10123 if (from_tty)
10124 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
10125 do_cleanups (back_to);
10126 }
10127
10128 void
10129 remote_file_get (const char *remote_file, const char *local_file, int from_tty)
10130 {
10131 struct cleanup *back_to, *close_cleanup;
10132 int fd, remote_errno, bytes, io_size;
10133 FILE *file;
10134 gdb_byte *buffer;
10135 ULONGEST offset;
10136 struct remote_state *rs = get_remote_state ();
10137
10138 if (!rs->remote_desc)
10139 error (_("command can only be used with remote target"));
10140
10141 fd = remote_hostio_open (find_target_at (process_stratum),
10142 remote_file, FILEIO_O_RDONLY, 0, &remote_errno);
10143 if (fd == -1)
10144 remote_hostio_error (remote_errno);
10145
10146 file = gdb_fopen_cloexec (local_file, "wb");
10147 if (file == NULL)
10148 perror_with_name (local_file);
10149 back_to = make_cleanup_fclose (file);
10150
10151 /* Send up to this many bytes at once. They won't all fit in the
10152 remote packet limit, so we'll transfer slightly fewer. */
10153 io_size = get_remote_packet_size ();
10154 buffer = xmalloc (io_size);
10155 make_cleanup (xfree, buffer);
10156
10157 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
10158
10159 offset = 0;
10160 while (1)
10161 {
10162 bytes = remote_hostio_pread (find_target_at (process_stratum),
10163 fd, buffer, io_size, offset, &remote_errno);
10164 if (bytes == 0)
10165 /* Success, but no bytes, means end-of-file. */
10166 break;
10167 if (bytes == -1)
10168 remote_hostio_error (remote_errno);
10169
10170 offset += bytes;
10171
10172 bytes = fwrite (buffer, 1, bytes, file);
10173 if (bytes == 0)
10174 perror_with_name (local_file);
10175 }
10176
10177 discard_cleanups (close_cleanup);
10178 if (remote_hostio_close (find_target_at (process_stratum), fd, &remote_errno))
10179 remote_hostio_error (remote_errno);
10180
10181 if (from_tty)
10182 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
10183 do_cleanups (back_to);
10184 }
10185
10186 void
10187 remote_file_delete (const char *remote_file, int from_tty)
10188 {
10189 int retcode, remote_errno;
10190 struct remote_state *rs = get_remote_state ();
10191
10192 if (!rs->remote_desc)
10193 error (_("command can only be used with remote target"));
10194
10195 retcode = remote_hostio_unlink (find_target_at (process_stratum),
10196 remote_file, &remote_errno);
10197 if (retcode == -1)
10198 remote_hostio_error (remote_errno);
10199
10200 if (from_tty)
10201 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
10202 }
10203
10204 static void
10205 remote_put_command (char *args, int from_tty)
10206 {
10207 struct cleanup *back_to;
10208 char **argv;
10209
10210 if (args == NULL)
10211 error_no_arg (_("file to put"));
10212
10213 argv = gdb_buildargv (args);
10214 back_to = make_cleanup_freeargv (argv);
10215 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
10216 error (_("Invalid parameters to remote put"));
10217
10218 remote_file_put (argv[0], argv[1], from_tty);
10219
10220 do_cleanups (back_to);
10221 }
10222
10223 static void
10224 remote_get_command (char *args, int from_tty)
10225 {
10226 struct cleanup *back_to;
10227 char **argv;
10228
10229 if (args == NULL)
10230 error_no_arg (_("file to get"));
10231
10232 argv = gdb_buildargv (args);
10233 back_to = make_cleanup_freeargv (argv);
10234 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
10235 error (_("Invalid parameters to remote get"));
10236
10237 remote_file_get (argv[0], argv[1], from_tty);
10238
10239 do_cleanups (back_to);
10240 }
10241
10242 static void
10243 remote_delete_command (char *args, int from_tty)
10244 {
10245 struct cleanup *back_to;
10246 char **argv;
10247
10248 if (args == NULL)
10249 error_no_arg (_("file to delete"));
10250
10251 argv = gdb_buildargv (args);
10252 back_to = make_cleanup_freeargv (argv);
10253 if (argv[0] == NULL || argv[1] != NULL)
10254 error (_("Invalid parameters to remote delete"));
10255
10256 remote_file_delete (argv[0], from_tty);
10257
10258 do_cleanups (back_to);
10259 }
10260
10261 static void
10262 remote_command (char *args, int from_tty)
10263 {
10264 help_list (remote_cmdlist, "remote ", all_commands, gdb_stdout);
10265 }
10266
10267 static int
10268 remote_can_execute_reverse (struct target_ops *self)
10269 {
10270 if (packet_support (PACKET_bs) == PACKET_ENABLE
10271 || packet_support (PACKET_bc) == PACKET_ENABLE)
10272 return 1;
10273 else
10274 return 0;
10275 }
10276
10277 static int
10278 remote_supports_non_stop (struct target_ops *self)
10279 {
10280 return 1;
10281 }
10282
10283 static int
10284 remote_supports_disable_randomization (struct target_ops *self)
10285 {
10286 /* Only supported in extended mode. */
10287 return 0;
10288 }
10289
10290 static int
10291 remote_supports_multi_process (struct target_ops *self)
10292 {
10293 struct remote_state *rs = get_remote_state ();
10294
10295 /* Only extended-remote handles being attached to multiple
10296 processes, even though plain remote can use the multi-process
10297 thread id extensions, so that GDB knows the target process's
10298 PID. */
10299 return rs->extended && remote_multi_process_p (rs);
10300 }
10301
10302 static int
10303 remote_supports_cond_tracepoints (void)
10304 {
10305 return packet_support (PACKET_ConditionalTracepoints) == PACKET_ENABLE;
10306 }
10307
10308 static int
10309 remote_supports_cond_breakpoints (struct target_ops *self)
10310 {
10311 return packet_support (PACKET_ConditionalBreakpoints) == PACKET_ENABLE;
10312 }
10313
10314 static int
10315 remote_supports_fast_tracepoints (void)
10316 {
10317 return packet_support (PACKET_FastTracepoints) == PACKET_ENABLE;
10318 }
10319
10320 static int
10321 remote_supports_static_tracepoints (void)
10322 {
10323 return packet_support (PACKET_StaticTracepoints) == PACKET_ENABLE;
10324 }
10325
10326 static int
10327 remote_supports_install_in_trace (void)
10328 {
10329 return packet_support (PACKET_InstallInTrace) == PACKET_ENABLE;
10330 }
10331
10332 static int
10333 remote_supports_enable_disable_tracepoint (struct target_ops *self)
10334 {
10335 return (packet_support (PACKET_EnableDisableTracepoints_feature)
10336 == PACKET_ENABLE);
10337 }
10338
10339 static int
10340 remote_supports_string_tracing (struct target_ops *self)
10341 {
10342 return packet_support (PACKET_tracenz_feature) == PACKET_ENABLE;
10343 }
10344
10345 static int
10346 remote_can_run_breakpoint_commands (struct target_ops *self)
10347 {
10348 return packet_support (PACKET_BreakpointCommands) == PACKET_ENABLE;
10349 }
10350
10351 static void
10352 remote_trace_init (struct target_ops *self)
10353 {
10354 putpkt ("QTinit");
10355 remote_get_noisy_reply (&target_buf, &target_buf_size);
10356 if (strcmp (target_buf, "OK") != 0)
10357 error (_("Target does not support this command."));
10358 }
10359
10360 static void free_actions_list (char **actions_list);
10361 static void free_actions_list_cleanup_wrapper (void *);
10362 static void
10363 free_actions_list_cleanup_wrapper (void *al)
10364 {
10365 free_actions_list (al);
10366 }
10367
10368 static void
10369 free_actions_list (char **actions_list)
10370 {
10371 int ndx;
10372
10373 if (actions_list == 0)
10374 return;
10375
10376 for (ndx = 0; actions_list[ndx]; ndx++)
10377 xfree (actions_list[ndx]);
10378
10379 xfree (actions_list);
10380 }
10381
10382 /* Recursive routine to walk through command list including loops, and
10383 download packets for each command. */
10384
10385 static void
10386 remote_download_command_source (int num, ULONGEST addr,
10387 struct command_line *cmds)
10388 {
10389 struct remote_state *rs = get_remote_state ();
10390 struct command_line *cmd;
10391
10392 for (cmd = cmds; cmd; cmd = cmd->next)
10393 {
10394 QUIT; /* Allow user to bail out with ^C. */
10395 strcpy (rs->buf, "QTDPsrc:");
10396 encode_source_string (num, addr, "cmd", cmd->line,
10397 rs->buf + strlen (rs->buf),
10398 rs->buf_size - strlen (rs->buf));
10399 putpkt (rs->buf);
10400 remote_get_noisy_reply (&target_buf, &target_buf_size);
10401 if (strcmp (target_buf, "OK"))
10402 warning (_("Target does not support source download."));
10403
10404 if (cmd->control_type == while_control
10405 || cmd->control_type == while_stepping_control)
10406 {
10407 remote_download_command_source (num, addr, *cmd->body_list);
10408
10409 QUIT; /* Allow user to bail out with ^C. */
10410 strcpy (rs->buf, "QTDPsrc:");
10411 encode_source_string (num, addr, "cmd", "end",
10412 rs->buf + strlen (rs->buf),
10413 rs->buf_size - strlen (rs->buf));
10414 putpkt (rs->buf);
10415 remote_get_noisy_reply (&target_buf, &target_buf_size);
10416 if (strcmp (target_buf, "OK"))
10417 warning (_("Target does not support source download."));
10418 }
10419 }
10420 }
10421
10422 static void
10423 remote_download_tracepoint (struct target_ops *self, struct bp_location *loc)
10424 {
10425 #define BUF_SIZE 2048
10426
10427 CORE_ADDR tpaddr;
10428 char addrbuf[40];
10429 char buf[BUF_SIZE];
10430 char **tdp_actions;
10431 char **stepping_actions;
10432 int ndx;
10433 struct cleanup *old_chain = NULL;
10434 struct agent_expr *aexpr;
10435 struct cleanup *aexpr_chain = NULL;
10436 char *pkt;
10437 struct breakpoint *b = loc->owner;
10438 struct tracepoint *t = (struct tracepoint *) b;
10439
10440 encode_actions_rsp (loc, &tdp_actions, &stepping_actions);
10441 old_chain = make_cleanup (free_actions_list_cleanup_wrapper,
10442 tdp_actions);
10443 (void) make_cleanup (free_actions_list_cleanup_wrapper,
10444 stepping_actions);
10445
10446 tpaddr = loc->address;
10447 sprintf_vma (addrbuf, tpaddr);
10448 xsnprintf (buf, BUF_SIZE, "QTDP:%x:%s:%c:%lx:%x", b->number,
10449 addrbuf, /* address */
10450 (b->enable_state == bp_enabled ? 'E' : 'D'),
10451 t->step_count, t->pass_count);
10452 /* Fast tracepoints are mostly handled by the target, but we can
10453 tell the target how big of an instruction block should be moved
10454 around. */
10455 if (b->type == bp_fast_tracepoint)
10456 {
10457 /* Only test for support at download time; we may not know
10458 target capabilities at definition time. */
10459 if (remote_supports_fast_tracepoints ())
10460 {
10461 int isize;
10462
10463 if (gdbarch_fast_tracepoint_valid_at (target_gdbarch (),
10464 tpaddr, &isize, NULL))
10465 xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":F%x",
10466 isize);
10467 else
10468 /* If it passed validation at definition but fails now,
10469 something is very wrong. */
10470 internal_error (__FILE__, __LINE__,
10471 _("Fast tracepoint not "
10472 "valid during download"));
10473 }
10474 else
10475 /* Fast tracepoints are functionally identical to regular
10476 tracepoints, so don't take lack of support as a reason to
10477 give up on the trace run. */
10478 warning (_("Target does not support fast tracepoints, "
10479 "downloading %d as regular tracepoint"), b->number);
10480 }
10481 else if (b->type == bp_static_tracepoint)
10482 {
10483 /* Only test for support at download time; we may not know
10484 target capabilities at definition time. */
10485 if (remote_supports_static_tracepoints ())
10486 {
10487 struct static_tracepoint_marker marker;
10488
10489 if (target_static_tracepoint_marker_at (tpaddr, &marker))
10490 strcat (buf, ":S");
10491 else
10492 error (_("Static tracepoint not valid during download"));
10493 }
10494 else
10495 /* Fast tracepoints are functionally identical to regular
10496 tracepoints, so don't take lack of support as a reason
10497 to give up on the trace run. */
10498 error (_("Target does not support static tracepoints"));
10499 }
10500 /* If the tracepoint has a conditional, make it into an agent
10501 expression and append to the definition. */
10502 if (loc->cond)
10503 {
10504 /* Only test support at download time, we may not know target
10505 capabilities at definition time. */
10506 if (remote_supports_cond_tracepoints ())
10507 {
10508 aexpr = gen_eval_for_expr (tpaddr, loc->cond);
10509 aexpr_chain = make_cleanup_free_agent_expr (aexpr);
10510 xsnprintf (buf + strlen (buf), BUF_SIZE - strlen (buf), ":X%x,",
10511 aexpr->len);
10512 pkt = buf + strlen (buf);
10513 for (ndx = 0; ndx < aexpr->len; ++ndx)
10514 pkt = pack_hex_byte (pkt, aexpr->buf[ndx]);
10515 *pkt = '\0';
10516 do_cleanups (aexpr_chain);
10517 }
10518 else
10519 warning (_("Target does not support conditional tracepoints, "
10520 "ignoring tp %d cond"), b->number);
10521 }
10522
10523 if (b->commands || *default_collect)
10524 strcat (buf, "-");
10525 putpkt (buf);
10526 remote_get_noisy_reply (&target_buf, &target_buf_size);
10527 if (strcmp (target_buf, "OK"))
10528 error (_("Target does not support tracepoints."));
10529
10530 /* do_single_steps (t); */
10531 if (tdp_actions)
10532 {
10533 for (ndx = 0; tdp_actions[ndx]; ndx++)
10534 {
10535 QUIT; /* Allow user to bail out with ^C. */
10536 xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%c",
10537 b->number, addrbuf, /* address */
10538 tdp_actions[ndx],
10539 ((tdp_actions[ndx + 1] || stepping_actions)
10540 ? '-' : 0));
10541 putpkt (buf);
10542 remote_get_noisy_reply (&target_buf,
10543 &target_buf_size);
10544 if (strcmp (target_buf, "OK"))
10545 error (_("Error on target while setting tracepoints."));
10546 }
10547 }
10548 if (stepping_actions)
10549 {
10550 for (ndx = 0; stepping_actions[ndx]; ndx++)
10551 {
10552 QUIT; /* Allow user to bail out with ^C. */
10553 xsnprintf (buf, BUF_SIZE, "QTDP:-%x:%s:%s%s%s",
10554 b->number, addrbuf, /* address */
10555 ((ndx == 0) ? "S" : ""),
10556 stepping_actions[ndx],
10557 (stepping_actions[ndx + 1] ? "-" : ""));
10558 putpkt (buf);
10559 remote_get_noisy_reply (&target_buf,
10560 &target_buf_size);
10561 if (strcmp (target_buf, "OK"))
10562 error (_("Error on target while setting tracepoints."));
10563 }
10564 }
10565
10566 if (packet_support (PACKET_TracepointSource) == PACKET_ENABLE)
10567 {
10568 if (b->addr_string)
10569 {
10570 strcpy (buf, "QTDPsrc:");
10571 encode_source_string (b->number, loc->address,
10572 "at", b->addr_string, buf + strlen (buf),
10573 2048 - strlen (buf));
10574
10575 putpkt (buf);
10576 remote_get_noisy_reply (&target_buf, &target_buf_size);
10577 if (strcmp (target_buf, "OK"))
10578 warning (_("Target does not support source download."));
10579 }
10580 if (b->cond_string)
10581 {
10582 strcpy (buf, "QTDPsrc:");
10583 encode_source_string (b->number, loc->address,
10584 "cond", b->cond_string, buf + strlen (buf),
10585 2048 - strlen (buf));
10586 putpkt (buf);
10587 remote_get_noisy_reply (&target_buf, &target_buf_size);
10588 if (strcmp (target_buf, "OK"))
10589 warning (_("Target does not support source download."));
10590 }
10591 remote_download_command_source (b->number, loc->address,
10592 breakpoint_commands (b));
10593 }
10594
10595 do_cleanups (old_chain);
10596 }
10597
10598 static int
10599 remote_can_download_tracepoint (struct target_ops *self)
10600 {
10601 struct remote_state *rs = get_remote_state ();
10602 struct trace_status *ts;
10603 int status;
10604
10605 /* Don't try to install tracepoints until we've relocated our
10606 symbols, and fetched and merged the target's tracepoint list with
10607 ours. */
10608 if (rs->starting_up)
10609 return 0;
10610
10611 ts = current_trace_status ();
10612 status = remote_get_trace_status (self, ts);
10613
10614 if (status == -1 || !ts->running_known || !ts->running)
10615 return 0;
10616
10617 /* If we are in a tracing experiment, but remote stub doesn't support
10618 installing tracepoint in trace, we have to return. */
10619 if (!remote_supports_install_in_trace ())
10620 return 0;
10621
10622 return 1;
10623 }
10624
10625
10626 static void
10627 remote_download_trace_state_variable (struct target_ops *self,
10628 struct trace_state_variable *tsv)
10629 {
10630 struct remote_state *rs = get_remote_state ();
10631 char *p;
10632
10633 xsnprintf (rs->buf, get_remote_packet_size (), "QTDV:%x:%s:%x:",
10634 tsv->number, phex ((ULONGEST) tsv->initial_value, 8),
10635 tsv->builtin);
10636 p = rs->buf + strlen (rs->buf);
10637 if ((p - rs->buf) + strlen (tsv->name) * 2 >= get_remote_packet_size ())
10638 error (_("Trace state variable name too long for tsv definition packet"));
10639 p += 2 * bin2hex ((gdb_byte *) (tsv->name), p, strlen (tsv->name));
10640 *p++ = '\0';
10641 putpkt (rs->buf);
10642 remote_get_noisy_reply (&target_buf, &target_buf_size);
10643 if (*target_buf == '\0')
10644 error (_("Target does not support this command."));
10645 if (strcmp (target_buf, "OK") != 0)
10646 error (_("Error on target while downloading trace state variable."));
10647 }
10648
10649 static void
10650 remote_enable_tracepoint (struct target_ops *self,
10651 struct bp_location *location)
10652 {
10653 struct remote_state *rs = get_remote_state ();
10654 char addr_buf[40];
10655
10656 sprintf_vma (addr_buf, location->address);
10657 xsnprintf (rs->buf, get_remote_packet_size (), "QTEnable:%x:%s",
10658 location->owner->number, addr_buf);
10659 putpkt (rs->buf);
10660 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
10661 if (*rs->buf == '\0')
10662 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
10663 if (strcmp (rs->buf, "OK") != 0)
10664 error (_("Error on target while enabling tracepoint."));
10665 }
10666
10667 static void
10668 remote_disable_tracepoint (struct target_ops *self,
10669 struct bp_location *location)
10670 {
10671 struct remote_state *rs = get_remote_state ();
10672 char addr_buf[40];
10673
10674 sprintf_vma (addr_buf, location->address);
10675 xsnprintf (rs->buf, get_remote_packet_size (), "QTDisable:%x:%s",
10676 location->owner->number, addr_buf);
10677 putpkt (rs->buf);
10678 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
10679 if (*rs->buf == '\0')
10680 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
10681 if (strcmp (rs->buf, "OK") != 0)
10682 error (_("Error on target while disabling tracepoint."));
10683 }
10684
10685 static void
10686 remote_trace_set_readonly_regions (struct target_ops *self)
10687 {
10688 asection *s;
10689 bfd *abfd = NULL;
10690 bfd_size_type size;
10691 bfd_vma vma;
10692 int anysecs = 0;
10693 int offset = 0;
10694
10695 if (!exec_bfd)
10696 return; /* No information to give. */
10697
10698 strcpy (target_buf, "QTro");
10699 offset = strlen (target_buf);
10700 for (s = exec_bfd->sections; s; s = s->next)
10701 {
10702 char tmp1[40], tmp2[40];
10703 int sec_length;
10704
10705 if ((s->flags & SEC_LOAD) == 0 ||
10706 /* (s->flags & SEC_CODE) == 0 || */
10707 (s->flags & SEC_READONLY) == 0)
10708 continue;
10709
10710 anysecs = 1;
10711 vma = bfd_get_section_vma (abfd, s);
10712 size = bfd_get_section_size (s);
10713 sprintf_vma (tmp1, vma);
10714 sprintf_vma (tmp2, vma + size);
10715 sec_length = 1 + strlen (tmp1) + 1 + strlen (tmp2);
10716 if (offset + sec_length + 1 > target_buf_size)
10717 {
10718 if (packet_support (PACKET_qXfer_traceframe_info) != PACKET_ENABLE)
10719 warning (_("\
10720 Too many sections for read-only sections definition packet."));
10721 break;
10722 }
10723 xsnprintf (target_buf + offset, target_buf_size - offset, ":%s,%s",
10724 tmp1, tmp2);
10725 offset += sec_length;
10726 }
10727 if (anysecs)
10728 {
10729 putpkt (target_buf);
10730 getpkt (&target_buf, &target_buf_size, 0);
10731 }
10732 }
10733
10734 static void
10735 remote_trace_start (struct target_ops *self)
10736 {
10737 putpkt ("QTStart");
10738 remote_get_noisy_reply (&target_buf, &target_buf_size);
10739 if (*target_buf == '\0')
10740 error (_("Target does not support this command."));
10741 if (strcmp (target_buf, "OK") != 0)
10742 error (_("Bogus reply from target: %s"), target_buf);
10743 }
10744
10745 static int
10746 remote_get_trace_status (struct target_ops *self, struct trace_status *ts)
10747 {
10748 /* Initialize it just to avoid a GCC false warning. */
10749 char *p = NULL;
10750 /* FIXME we need to get register block size some other way. */
10751 extern int trace_regblock_size;
10752 volatile struct gdb_exception ex;
10753 enum packet_result result;
10754
10755 if (packet_support (PACKET_qTStatus) == PACKET_DISABLE)
10756 return -1;
10757
10758 trace_regblock_size = get_remote_arch_state ()->sizeof_g_packet;
10759
10760 putpkt ("qTStatus");
10761
10762 TRY_CATCH (ex, RETURN_MASK_ERROR)
10763 {
10764 p = remote_get_noisy_reply (&target_buf, &target_buf_size);
10765 }
10766 if (ex.reason < 0)
10767 {
10768 if (ex.error != TARGET_CLOSE_ERROR)
10769 {
10770 exception_fprintf (gdb_stderr, ex, "qTStatus: ");
10771 return -1;
10772 }
10773 throw_exception (ex);
10774 }
10775
10776 result = packet_ok (p, &remote_protocol_packets[PACKET_qTStatus]);
10777
10778 /* If the remote target doesn't do tracing, flag it. */
10779 if (result == PACKET_UNKNOWN)
10780 return -1;
10781
10782 /* We're working with a live target. */
10783 ts->filename = NULL;
10784
10785 if (*p++ != 'T')
10786 error (_("Bogus trace status reply from target: %s"), target_buf);
10787
10788 /* Function 'parse_trace_status' sets default value of each field of
10789 'ts' at first, so we don't have to do it here. */
10790 parse_trace_status (p, ts);
10791
10792 return ts->running;
10793 }
10794
10795 static void
10796 remote_get_tracepoint_status (struct target_ops *self, struct breakpoint *bp,
10797 struct uploaded_tp *utp)
10798 {
10799 struct remote_state *rs = get_remote_state ();
10800 char *reply;
10801 struct bp_location *loc;
10802 struct tracepoint *tp = (struct tracepoint *) bp;
10803 size_t size = get_remote_packet_size ();
10804
10805 if (tp)
10806 {
10807 tp->base.hit_count = 0;
10808 tp->traceframe_usage = 0;
10809 for (loc = tp->base.loc; loc; loc = loc->next)
10810 {
10811 /* If the tracepoint was never downloaded, don't go asking for
10812 any status. */
10813 if (tp->number_on_target == 0)
10814 continue;
10815 xsnprintf (rs->buf, size, "qTP:%x:%s", tp->number_on_target,
10816 phex_nz (loc->address, 0));
10817 putpkt (rs->buf);
10818 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
10819 if (reply && *reply)
10820 {
10821 if (*reply == 'V')
10822 parse_tracepoint_status (reply + 1, bp, utp);
10823 }
10824 }
10825 }
10826 else if (utp)
10827 {
10828 utp->hit_count = 0;
10829 utp->traceframe_usage = 0;
10830 xsnprintf (rs->buf, size, "qTP:%x:%s", utp->number,
10831 phex_nz (utp->addr, 0));
10832 putpkt (rs->buf);
10833 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
10834 if (reply && *reply)
10835 {
10836 if (*reply == 'V')
10837 parse_tracepoint_status (reply + 1, bp, utp);
10838 }
10839 }
10840 }
10841
10842 static void
10843 remote_trace_stop (struct target_ops *self)
10844 {
10845 putpkt ("QTStop");
10846 remote_get_noisy_reply (&target_buf, &target_buf_size);
10847 if (*target_buf == '\0')
10848 error (_("Target does not support this command."));
10849 if (strcmp (target_buf, "OK") != 0)
10850 error (_("Bogus reply from target: %s"), target_buf);
10851 }
10852
10853 static int
10854 remote_trace_find (struct target_ops *self,
10855 enum trace_find_type type, int num,
10856 CORE_ADDR addr1, CORE_ADDR addr2,
10857 int *tpp)
10858 {
10859 struct remote_state *rs = get_remote_state ();
10860 char *endbuf = rs->buf + get_remote_packet_size ();
10861 char *p, *reply;
10862 int target_frameno = -1, target_tracept = -1;
10863
10864 /* Lookups other than by absolute frame number depend on the current
10865 trace selected, so make sure it is correct on the remote end
10866 first. */
10867 if (type != tfind_number)
10868 set_remote_traceframe ();
10869
10870 p = rs->buf;
10871 strcpy (p, "QTFrame:");
10872 p = strchr (p, '\0');
10873 switch (type)
10874 {
10875 case tfind_number:
10876 xsnprintf (p, endbuf - p, "%x", num);
10877 break;
10878 case tfind_pc:
10879 xsnprintf (p, endbuf - p, "pc:%s", phex_nz (addr1, 0));
10880 break;
10881 case tfind_tp:
10882 xsnprintf (p, endbuf - p, "tdp:%x", num);
10883 break;
10884 case tfind_range:
10885 xsnprintf (p, endbuf - p, "range:%s:%s", phex_nz (addr1, 0),
10886 phex_nz (addr2, 0));
10887 break;
10888 case tfind_outside:
10889 xsnprintf (p, endbuf - p, "outside:%s:%s", phex_nz (addr1, 0),
10890 phex_nz (addr2, 0));
10891 break;
10892 default:
10893 error (_("Unknown trace find type %d"), type);
10894 }
10895
10896 putpkt (rs->buf);
10897 reply = remote_get_noisy_reply (&(rs->buf), &rs->buf_size);
10898 if (*reply == '\0')
10899 error (_("Target does not support this command."));
10900
10901 while (reply && *reply)
10902 switch (*reply)
10903 {
10904 case 'F':
10905 p = ++reply;
10906 target_frameno = (int) strtol (p, &reply, 16);
10907 if (reply == p)
10908 error (_("Unable to parse trace frame number"));
10909 /* Don't update our remote traceframe number cache on failure
10910 to select a remote traceframe. */
10911 if (target_frameno == -1)
10912 return -1;
10913 break;
10914 case 'T':
10915 p = ++reply;
10916 target_tracept = (int) strtol (p, &reply, 16);
10917 if (reply == p)
10918 error (_("Unable to parse tracepoint number"));
10919 break;
10920 case 'O': /* "OK"? */
10921 if (reply[1] == 'K' && reply[2] == '\0')
10922 reply += 2;
10923 else
10924 error (_("Bogus reply from target: %s"), reply);
10925 break;
10926 default:
10927 error (_("Bogus reply from target: %s"), reply);
10928 }
10929 if (tpp)
10930 *tpp = target_tracept;
10931
10932 rs->remote_traceframe_number = target_frameno;
10933 return target_frameno;
10934 }
10935
10936 static int
10937 remote_get_trace_state_variable_value (struct target_ops *self,
10938 int tsvnum, LONGEST *val)
10939 {
10940 struct remote_state *rs = get_remote_state ();
10941 char *reply;
10942 ULONGEST uval;
10943
10944 set_remote_traceframe ();
10945
10946 xsnprintf (rs->buf, get_remote_packet_size (), "qTV:%x", tsvnum);
10947 putpkt (rs->buf);
10948 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
10949 if (reply && *reply)
10950 {
10951 if (*reply == 'V')
10952 {
10953 unpack_varlen_hex (reply + 1, &uval);
10954 *val = (LONGEST) uval;
10955 return 1;
10956 }
10957 }
10958 return 0;
10959 }
10960
10961 static int
10962 remote_save_trace_data (struct target_ops *self, const char *filename)
10963 {
10964 struct remote_state *rs = get_remote_state ();
10965 char *p, *reply;
10966
10967 p = rs->buf;
10968 strcpy (p, "QTSave:");
10969 p += strlen (p);
10970 if ((p - rs->buf) + strlen (filename) * 2 >= get_remote_packet_size ())
10971 error (_("Remote file name too long for trace save packet"));
10972 p += 2 * bin2hex ((gdb_byte *) filename, p, strlen (filename));
10973 *p++ = '\0';
10974 putpkt (rs->buf);
10975 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
10976 if (*reply == '\0')
10977 error (_("Target does not support this command."));
10978 if (strcmp (reply, "OK") != 0)
10979 error (_("Bogus reply from target: %s"), reply);
10980 return 0;
10981 }
10982
10983 /* This is basically a memory transfer, but needs to be its own packet
10984 because we don't know how the target actually organizes its trace
10985 memory, plus we want to be able to ask for as much as possible, but
10986 not be unhappy if we don't get as much as we ask for. */
10987
10988 static LONGEST
10989 remote_get_raw_trace_data (struct target_ops *self,
10990 gdb_byte *buf, ULONGEST offset, LONGEST len)
10991 {
10992 struct remote_state *rs = get_remote_state ();
10993 char *reply;
10994 char *p;
10995 int rslt;
10996
10997 p = rs->buf;
10998 strcpy (p, "qTBuffer:");
10999 p += strlen (p);
11000 p += hexnumstr (p, offset);
11001 *p++ = ',';
11002 p += hexnumstr (p, len);
11003 *p++ = '\0';
11004
11005 putpkt (rs->buf);
11006 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
11007 if (reply && *reply)
11008 {
11009 /* 'l' by itself means we're at the end of the buffer and
11010 there is nothing more to get. */
11011 if (*reply == 'l')
11012 return 0;
11013
11014 /* Convert the reply into binary. Limit the number of bytes to
11015 convert according to our passed-in buffer size, rather than
11016 what was returned in the packet; if the target is
11017 unexpectedly generous and gives us a bigger reply than we
11018 asked for, we don't want to crash. */
11019 rslt = hex2bin (target_buf, buf, len);
11020 return rslt;
11021 }
11022
11023 /* Something went wrong, flag as an error. */
11024 return -1;
11025 }
11026
11027 static void
11028 remote_set_disconnected_tracing (struct target_ops *self, int val)
11029 {
11030 struct remote_state *rs = get_remote_state ();
11031
11032 if (packet_support (PACKET_DisconnectedTracing_feature) == PACKET_ENABLE)
11033 {
11034 char *reply;
11035
11036 xsnprintf (rs->buf, get_remote_packet_size (), "QTDisconnected:%x", val);
11037 putpkt (rs->buf);
11038 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
11039 if (*reply == '\0')
11040 error (_("Target does not support this command."));
11041 if (strcmp (reply, "OK") != 0)
11042 error (_("Bogus reply from target: %s"), reply);
11043 }
11044 else if (val)
11045 warning (_("Target does not support disconnected tracing."));
11046 }
11047
11048 static int
11049 remote_core_of_thread (struct target_ops *ops, ptid_t ptid)
11050 {
11051 struct thread_info *info = find_thread_ptid (ptid);
11052
11053 if (info && info->private)
11054 return info->private->core;
11055 return -1;
11056 }
11057
11058 static void
11059 remote_set_circular_trace_buffer (struct target_ops *self, int val)
11060 {
11061 struct remote_state *rs = get_remote_state ();
11062 char *reply;
11063
11064 xsnprintf (rs->buf, get_remote_packet_size (), "QTBuffer:circular:%x", val);
11065 putpkt (rs->buf);
11066 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
11067 if (*reply == '\0')
11068 error (_("Target does not support this command."));
11069 if (strcmp (reply, "OK") != 0)
11070 error (_("Bogus reply from target: %s"), reply);
11071 }
11072
11073 static struct traceframe_info *
11074 remote_traceframe_info (struct target_ops *self)
11075 {
11076 char *text;
11077
11078 text = target_read_stralloc (&current_target,
11079 TARGET_OBJECT_TRACEFRAME_INFO, NULL);
11080 if (text != NULL)
11081 {
11082 struct traceframe_info *info;
11083 struct cleanup *back_to = make_cleanup (xfree, text);
11084
11085 info = parse_traceframe_info (text);
11086 do_cleanups (back_to);
11087 return info;
11088 }
11089
11090 return NULL;
11091 }
11092
11093 /* Handle the qTMinFTPILen packet. Returns the minimum length of
11094 instruction on which a fast tracepoint may be placed. Returns -1
11095 if the packet is not supported, and 0 if the minimum instruction
11096 length is unknown. */
11097
11098 static int
11099 remote_get_min_fast_tracepoint_insn_len (struct target_ops *self)
11100 {
11101 struct remote_state *rs = get_remote_state ();
11102 char *reply;
11103
11104 /* If we're not debugging a process yet, the IPA can't be
11105 loaded. */
11106 if (!target_has_execution)
11107 return 0;
11108
11109 /* Make sure the remote is pointing at the right process. */
11110 set_general_process ();
11111
11112 xsnprintf (rs->buf, get_remote_packet_size (), "qTMinFTPILen");
11113 putpkt (rs->buf);
11114 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
11115 if (*reply == '\0')
11116 return -1;
11117 else
11118 {
11119 ULONGEST min_insn_len;
11120
11121 unpack_varlen_hex (reply, &min_insn_len);
11122
11123 return (int) min_insn_len;
11124 }
11125 }
11126
11127 static void
11128 remote_set_trace_buffer_size (struct target_ops *self, LONGEST val)
11129 {
11130 if (packet_support (PACKET_QTBuffer_size) != PACKET_DISABLE)
11131 {
11132 struct remote_state *rs = get_remote_state ();
11133 char *buf = rs->buf;
11134 char *endbuf = rs->buf + get_remote_packet_size ();
11135 enum packet_result result;
11136
11137 gdb_assert (val >= 0 || val == -1);
11138 buf += xsnprintf (buf, endbuf - buf, "QTBuffer:size:");
11139 /* Send -1 as literal "-1" to avoid host size dependency. */
11140 if (val < 0)
11141 {
11142 *buf++ = '-';
11143 buf += hexnumstr (buf, (ULONGEST) -val);
11144 }
11145 else
11146 buf += hexnumstr (buf, (ULONGEST) val);
11147
11148 putpkt (rs->buf);
11149 remote_get_noisy_reply (&rs->buf, &rs->buf_size);
11150 result = packet_ok (rs->buf,
11151 &remote_protocol_packets[PACKET_QTBuffer_size]);
11152
11153 if (result != PACKET_OK)
11154 warning (_("Bogus reply from target: %s"), rs->buf);
11155 }
11156 }
11157
11158 static int
11159 remote_set_trace_notes (struct target_ops *self,
11160 const char *user, const char *notes,
11161 const char *stop_notes)
11162 {
11163 struct remote_state *rs = get_remote_state ();
11164 char *reply;
11165 char *buf = rs->buf;
11166 char *endbuf = rs->buf + get_remote_packet_size ();
11167 int nbytes;
11168
11169 buf += xsnprintf (buf, endbuf - buf, "QTNotes:");
11170 if (user)
11171 {
11172 buf += xsnprintf (buf, endbuf - buf, "user:");
11173 nbytes = bin2hex ((gdb_byte *) user, buf, strlen (user));
11174 buf += 2 * nbytes;
11175 *buf++ = ';';
11176 }
11177 if (notes)
11178 {
11179 buf += xsnprintf (buf, endbuf - buf, "notes:");
11180 nbytes = bin2hex ((gdb_byte *) notes, buf, strlen (notes));
11181 buf += 2 * nbytes;
11182 *buf++ = ';';
11183 }
11184 if (stop_notes)
11185 {
11186 buf += xsnprintf (buf, endbuf - buf, "tstop:");
11187 nbytes = bin2hex ((gdb_byte *) stop_notes, buf, strlen (stop_notes));
11188 buf += 2 * nbytes;
11189 *buf++ = ';';
11190 }
11191 /* Ensure the buffer is terminated. */
11192 *buf = '\0';
11193
11194 putpkt (rs->buf);
11195 reply = remote_get_noisy_reply (&target_buf, &target_buf_size);
11196 if (*reply == '\0')
11197 return 0;
11198
11199 if (strcmp (reply, "OK") != 0)
11200 error (_("Bogus reply from target: %s"), reply);
11201
11202 return 1;
11203 }
11204
11205 static int
11206 remote_use_agent (struct target_ops *self, int use)
11207 {
11208 if (packet_support (PACKET_QAgent) != PACKET_DISABLE)
11209 {
11210 struct remote_state *rs = get_remote_state ();
11211
11212 /* If the stub supports QAgent. */
11213 xsnprintf (rs->buf, get_remote_packet_size (), "QAgent:%d", use);
11214 putpkt (rs->buf);
11215 getpkt (&rs->buf, &rs->buf_size, 0);
11216
11217 if (strcmp (rs->buf, "OK") == 0)
11218 {
11219 use_agent = use;
11220 return 1;
11221 }
11222 }
11223
11224 return 0;
11225 }
11226
11227 static int
11228 remote_can_use_agent (struct target_ops *self)
11229 {
11230 return (packet_support (PACKET_QAgent) != PACKET_DISABLE);
11231 }
11232
11233 struct btrace_target_info
11234 {
11235 /* The ptid of the traced thread. */
11236 ptid_t ptid;
11237 };
11238
11239 /* Check whether the target supports branch tracing. */
11240
11241 static int
11242 remote_supports_btrace (struct target_ops *self)
11243 {
11244 if (packet_support (PACKET_Qbtrace_off) != PACKET_ENABLE)
11245 return 0;
11246 if (packet_support (PACKET_Qbtrace_bts) != PACKET_ENABLE)
11247 return 0;
11248 if (packet_support (PACKET_qXfer_btrace) != PACKET_ENABLE)
11249 return 0;
11250
11251 return 1;
11252 }
11253
11254 /* Enable branch tracing. */
11255
11256 static struct btrace_target_info *
11257 remote_enable_btrace (struct target_ops *self, ptid_t ptid)
11258 {
11259 struct btrace_target_info *tinfo = NULL;
11260 struct packet_config *packet = &remote_protocol_packets[PACKET_Qbtrace_bts];
11261 struct remote_state *rs = get_remote_state ();
11262 char *buf = rs->buf;
11263 char *endbuf = rs->buf + get_remote_packet_size ();
11264
11265 if (packet_config_support (packet) != PACKET_ENABLE)
11266 error (_("Target does not support branch tracing."));
11267
11268 set_general_thread (ptid);
11269
11270 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
11271 putpkt (rs->buf);
11272 getpkt (&rs->buf, &rs->buf_size, 0);
11273
11274 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
11275 {
11276 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
11277 error (_("Could not enable branch tracing for %s: %s"),
11278 target_pid_to_str (ptid), rs->buf + 2);
11279 else
11280 error (_("Could not enable branch tracing for %s."),
11281 target_pid_to_str (ptid));
11282 }
11283
11284 tinfo = xzalloc (sizeof (*tinfo));
11285 tinfo->ptid = ptid;
11286
11287 return tinfo;
11288 }
11289
11290 /* Disable branch tracing. */
11291
11292 static void
11293 remote_disable_btrace (struct target_ops *self,
11294 struct btrace_target_info *tinfo)
11295 {
11296 struct packet_config *packet = &remote_protocol_packets[PACKET_Qbtrace_off];
11297 struct remote_state *rs = get_remote_state ();
11298 char *buf = rs->buf;
11299 char *endbuf = rs->buf + get_remote_packet_size ();
11300
11301 if (packet_config_support (packet) != PACKET_ENABLE)
11302 error (_("Target does not support branch tracing."));
11303
11304 set_general_thread (tinfo->ptid);
11305
11306 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
11307 putpkt (rs->buf);
11308 getpkt (&rs->buf, &rs->buf_size, 0);
11309
11310 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
11311 {
11312 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
11313 error (_("Could not disable branch tracing for %s: %s"),
11314 target_pid_to_str (tinfo->ptid), rs->buf + 2);
11315 else
11316 error (_("Could not disable branch tracing for %s."),
11317 target_pid_to_str (tinfo->ptid));
11318 }
11319
11320 xfree (tinfo);
11321 }
11322
11323 /* Teardown branch tracing. */
11324
11325 static void
11326 remote_teardown_btrace (struct target_ops *self,
11327 struct btrace_target_info *tinfo)
11328 {
11329 /* We must not talk to the target during teardown. */
11330 xfree (tinfo);
11331 }
11332
11333 /* Read the branch trace. */
11334
11335 static enum btrace_error
11336 remote_read_btrace (struct target_ops *self,
11337 VEC (btrace_block_s) **btrace,
11338 struct btrace_target_info *tinfo,
11339 enum btrace_read_type type)
11340 {
11341 struct packet_config *packet = &remote_protocol_packets[PACKET_qXfer_btrace];
11342 struct remote_state *rs = get_remote_state ();
11343 struct cleanup *cleanup;
11344 const char *annex;
11345 char *xml;
11346
11347 if (packet_config_support (packet) != PACKET_ENABLE)
11348 error (_("Target does not support branch tracing."));
11349
11350 #if !defined(HAVE_LIBEXPAT)
11351 error (_("Cannot process branch tracing result. XML parsing not supported."));
11352 #endif
11353
11354 switch (type)
11355 {
11356 case BTRACE_READ_ALL:
11357 annex = "all";
11358 break;
11359 case BTRACE_READ_NEW:
11360 annex = "new";
11361 break;
11362 case BTRACE_READ_DELTA:
11363 annex = "delta";
11364 break;
11365 default:
11366 internal_error (__FILE__, __LINE__,
11367 _("Bad branch tracing read type: %u."),
11368 (unsigned int) type);
11369 }
11370
11371 xml = target_read_stralloc (&current_target,
11372 TARGET_OBJECT_BTRACE, annex);
11373 if (xml == NULL)
11374 return BTRACE_ERR_UNKNOWN;
11375
11376 cleanup = make_cleanup (xfree, xml);
11377 *btrace = parse_xml_btrace (xml);
11378 do_cleanups (cleanup);
11379
11380 return BTRACE_ERR_NONE;
11381 }
11382
11383 static int
11384 remote_augmented_libraries_svr4_read (struct target_ops *self)
11385 {
11386 return (packet_support (PACKET_augmented_libraries_svr4_read_feature)
11387 == PACKET_ENABLE);
11388 }
11389
11390 /* Implementation of to_load. */
11391
11392 static void
11393 remote_load (struct target_ops *self, const char *name, int from_tty)
11394 {
11395 generic_load (name, from_tty);
11396 }
11397
11398 static void
11399 init_remote_ops (void)
11400 {
11401 remote_ops.to_shortname = "remote";
11402 remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
11403 remote_ops.to_doc =
11404 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
11405 Specify the serial device it is connected to\n\
11406 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
11407 remote_ops.to_open = remote_open;
11408 remote_ops.to_close = remote_close;
11409 remote_ops.to_detach = remote_detach;
11410 remote_ops.to_disconnect = remote_disconnect;
11411 remote_ops.to_resume = remote_resume;
11412 remote_ops.to_wait = remote_wait;
11413 remote_ops.to_fetch_registers = remote_fetch_registers;
11414 remote_ops.to_store_registers = remote_store_registers;
11415 remote_ops.to_prepare_to_store = remote_prepare_to_store;
11416 remote_ops.to_files_info = remote_files_info;
11417 remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
11418 remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
11419 remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
11420 remote_ops.to_stopped_data_address = remote_stopped_data_address;
11421 remote_ops.to_watchpoint_addr_within_range =
11422 remote_watchpoint_addr_within_range;
11423 remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
11424 remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
11425 remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
11426 remote_ops.to_region_ok_for_hw_watchpoint
11427 = remote_region_ok_for_hw_watchpoint;
11428 remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
11429 remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
11430 remote_ops.to_kill = remote_kill;
11431 remote_ops.to_load = remote_load;
11432 remote_ops.to_mourn_inferior = remote_mourn;
11433 remote_ops.to_pass_signals = remote_pass_signals;
11434 remote_ops.to_program_signals = remote_program_signals;
11435 remote_ops.to_thread_alive = remote_thread_alive;
11436 remote_ops.to_find_new_threads = remote_threads_info;
11437 remote_ops.to_pid_to_str = remote_pid_to_str;
11438 remote_ops.to_extra_thread_info = remote_threads_extra_info;
11439 remote_ops.to_get_ada_task_ptid = remote_get_ada_task_ptid;
11440 remote_ops.to_stop = remote_stop;
11441 remote_ops.to_xfer_partial = remote_xfer_partial;
11442 remote_ops.to_rcmd = remote_rcmd;
11443 remote_ops.to_log_command = serial_log_command;
11444 remote_ops.to_get_thread_local_address = remote_get_thread_local_address;
11445 remote_ops.to_stratum = process_stratum;
11446 remote_ops.to_has_all_memory = default_child_has_all_memory;
11447 remote_ops.to_has_memory = default_child_has_memory;
11448 remote_ops.to_has_stack = default_child_has_stack;
11449 remote_ops.to_has_registers = default_child_has_registers;
11450 remote_ops.to_has_execution = default_child_has_execution;
11451 remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
11452 remote_ops.to_can_execute_reverse = remote_can_execute_reverse;
11453 remote_ops.to_magic = OPS_MAGIC;
11454 remote_ops.to_memory_map = remote_memory_map;
11455 remote_ops.to_flash_erase = remote_flash_erase;
11456 remote_ops.to_flash_done = remote_flash_done;
11457 remote_ops.to_read_description = remote_read_description;
11458 remote_ops.to_search_memory = remote_search_memory;
11459 remote_ops.to_can_async_p = remote_can_async_p;
11460 remote_ops.to_is_async_p = remote_is_async_p;
11461 remote_ops.to_async = remote_async;
11462 remote_ops.to_terminal_inferior = remote_terminal_inferior;
11463 remote_ops.to_terminal_ours = remote_terminal_ours;
11464 remote_ops.to_supports_non_stop = remote_supports_non_stop;
11465 remote_ops.to_supports_multi_process = remote_supports_multi_process;
11466 remote_ops.to_supports_disable_randomization
11467 = remote_supports_disable_randomization;
11468 remote_ops.to_fileio_open = remote_hostio_open;
11469 remote_ops.to_fileio_pwrite = remote_hostio_pwrite;
11470 remote_ops.to_fileio_pread = remote_hostio_pread;
11471 remote_ops.to_fileio_close = remote_hostio_close;
11472 remote_ops.to_fileio_unlink = remote_hostio_unlink;
11473 remote_ops.to_fileio_readlink = remote_hostio_readlink;
11474 remote_ops.to_supports_enable_disable_tracepoint = remote_supports_enable_disable_tracepoint;
11475 remote_ops.to_supports_string_tracing = remote_supports_string_tracing;
11476 remote_ops.to_supports_evaluation_of_breakpoint_conditions = remote_supports_cond_breakpoints;
11477 remote_ops.to_can_run_breakpoint_commands = remote_can_run_breakpoint_commands;
11478 remote_ops.to_trace_init = remote_trace_init;
11479 remote_ops.to_download_tracepoint = remote_download_tracepoint;
11480 remote_ops.to_can_download_tracepoint = remote_can_download_tracepoint;
11481 remote_ops.to_download_trace_state_variable
11482 = remote_download_trace_state_variable;
11483 remote_ops.to_enable_tracepoint = remote_enable_tracepoint;
11484 remote_ops.to_disable_tracepoint = remote_disable_tracepoint;
11485 remote_ops.to_trace_set_readonly_regions = remote_trace_set_readonly_regions;
11486 remote_ops.to_trace_start = remote_trace_start;
11487 remote_ops.to_get_trace_status = remote_get_trace_status;
11488 remote_ops.to_get_tracepoint_status = remote_get_tracepoint_status;
11489 remote_ops.to_trace_stop = remote_trace_stop;
11490 remote_ops.to_trace_find = remote_trace_find;
11491 remote_ops.to_get_trace_state_variable_value
11492 = remote_get_trace_state_variable_value;
11493 remote_ops.to_save_trace_data = remote_save_trace_data;
11494 remote_ops.to_upload_tracepoints = remote_upload_tracepoints;
11495 remote_ops.to_upload_trace_state_variables
11496 = remote_upload_trace_state_variables;
11497 remote_ops.to_get_raw_trace_data = remote_get_raw_trace_data;
11498 remote_ops.to_get_min_fast_tracepoint_insn_len = remote_get_min_fast_tracepoint_insn_len;
11499 remote_ops.to_set_disconnected_tracing = remote_set_disconnected_tracing;
11500 remote_ops.to_set_circular_trace_buffer = remote_set_circular_trace_buffer;
11501 remote_ops.to_set_trace_buffer_size = remote_set_trace_buffer_size;
11502 remote_ops.to_set_trace_notes = remote_set_trace_notes;
11503 remote_ops.to_core_of_thread = remote_core_of_thread;
11504 remote_ops.to_verify_memory = remote_verify_memory;
11505 remote_ops.to_get_tib_address = remote_get_tib_address;
11506 remote_ops.to_set_permissions = remote_set_permissions;
11507 remote_ops.to_static_tracepoint_marker_at
11508 = remote_static_tracepoint_marker_at;
11509 remote_ops.to_static_tracepoint_markers_by_strid
11510 = remote_static_tracepoint_markers_by_strid;
11511 remote_ops.to_traceframe_info = remote_traceframe_info;
11512 remote_ops.to_use_agent = remote_use_agent;
11513 remote_ops.to_can_use_agent = remote_can_use_agent;
11514 remote_ops.to_supports_btrace = remote_supports_btrace;
11515 remote_ops.to_enable_btrace = remote_enable_btrace;
11516 remote_ops.to_disable_btrace = remote_disable_btrace;
11517 remote_ops.to_teardown_btrace = remote_teardown_btrace;
11518 remote_ops.to_read_btrace = remote_read_btrace;
11519 remote_ops.to_augmented_libraries_svr4_read =
11520 remote_augmented_libraries_svr4_read;
11521 }
11522
11523 /* Set up the extended remote vector by making a copy of the standard
11524 remote vector and adding to it. */
11525
11526 static void
11527 init_extended_remote_ops (void)
11528 {
11529 extended_remote_ops = remote_ops;
11530
11531 extended_remote_ops.to_shortname = "extended-remote";
11532 extended_remote_ops.to_longname =
11533 "Extended remote serial target in gdb-specific protocol";
11534 extended_remote_ops.to_doc =
11535 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
11536 Specify the serial device it is connected to (e.g. /dev/ttya).";
11537 extended_remote_ops.to_open = extended_remote_open;
11538 extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
11539 extended_remote_ops.to_mourn_inferior = extended_remote_mourn;
11540 extended_remote_ops.to_detach = extended_remote_detach;
11541 extended_remote_ops.to_attach = extended_remote_attach;
11542 extended_remote_ops.to_post_attach = extended_remote_post_attach;
11543 extended_remote_ops.to_kill = extended_remote_kill;
11544 extended_remote_ops.to_supports_disable_randomization
11545 = extended_remote_supports_disable_randomization;
11546 }
11547
11548 static int
11549 remote_can_async_p (struct target_ops *ops)
11550 {
11551 struct remote_state *rs = get_remote_state ();
11552
11553 if (!target_async_permitted)
11554 /* We only enable async when the user specifically asks for it. */
11555 return 0;
11556
11557 /* We're async whenever the serial device is. */
11558 return serial_can_async_p (rs->remote_desc);
11559 }
11560
11561 static int
11562 remote_is_async_p (struct target_ops *ops)
11563 {
11564 struct remote_state *rs = get_remote_state ();
11565
11566 if (!target_async_permitted)
11567 /* We only enable async when the user specifically asks for it. */
11568 return 0;
11569
11570 /* We're async whenever the serial device is. */
11571 return serial_is_async_p (rs->remote_desc);
11572 }
11573
11574 /* Pass the SERIAL event on and up to the client. One day this code
11575 will be able to delay notifying the client of an event until the
11576 point where an entire packet has been received. */
11577
11578 static serial_event_ftype remote_async_serial_handler;
11579
11580 static void
11581 remote_async_serial_handler (struct serial *scb, void *context)
11582 {
11583 struct remote_state *rs = context;
11584
11585 /* Don't propogate error information up to the client. Instead let
11586 the client find out about the error by querying the target. */
11587 rs->async_client_callback (INF_REG_EVENT, rs->async_client_context);
11588 }
11589
11590 static void
11591 remote_async_inferior_event_handler (gdb_client_data data)
11592 {
11593 inferior_event_handler (INF_REG_EVENT, NULL);
11594 }
11595
11596 static void
11597 remote_async (struct target_ops *ops,
11598 void (*callback) (enum inferior_event_type event_type,
11599 void *context),
11600 void *context)
11601 {
11602 struct remote_state *rs = get_remote_state ();
11603
11604 if (callback != NULL)
11605 {
11606 serial_async (rs->remote_desc, remote_async_serial_handler, rs);
11607 rs->async_client_callback = callback;
11608 rs->async_client_context = context;
11609 }
11610 else
11611 serial_async (rs->remote_desc, NULL, NULL);
11612 }
11613
11614 static void
11615 set_remote_cmd (char *args, int from_tty)
11616 {
11617 help_list (remote_set_cmdlist, "set remote ", all_commands, gdb_stdout);
11618 }
11619
11620 static void
11621 show_remote_cmd (char *args, int from_tty)
11622 {
11623 /* We can't just use cmd_show_list here, because we want to skip
11624 the redundant "show remote Z-packet" and the legacy aliases. */
11625 struct cleanup *showlist_chain;
11626 struct cmd_list_element *list = remote_show_cmdlist;
11627 struct ui_out *uiout = current_uiout;
11628
11629 showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist");
11630 for (; list != NULL; list = list->next)
11631 if (strcmp (list->name, "Z-packet") == 0)
11632 continue;
11633 else if (list->type == not_set_cmd)
11634 /* Alias commands are exactly like the original, except they
11635 don't have the normal type. */
11636 continue;
11637 else
11638 {
11639 struct cleanup *option_chain
11640 = make_cleanup_ui_out_tuple_begin_end (uiout, "option");
11641
11642 ui_out_field_string (uiout, "name", list->name);
11643 ui_out_text (uiout, ": ");
11644 if (list->type == show_cmd)
11645 do_show_command ((char *) NULL, from_tty, list);
11646 else
11647 cmd_func (list, NULL, from_tty);
11648 /* Close the tuple. */
11649 do_cleanups (option_chain);
11650 }
11651
11652 /* Close the tuple. */
11653 do_cleanups (showlist_chain);
11654 }
11655
11656
11657 /* Function to be called whenever a new objfile (shlib) is detected. */
11658 static void
11659 remote_new_objfile (struct objfile *objfile)
11660 {
11661 struct remote_state *rs = get_remote_state ();
11662
11663 if (rs->remote_desc != 0) /* Have a remote connection. */
11664 remote_check_symbols ();
11665 }
11666
11667 /* Pull all the tracepoints defined on the target and create local
11668 data structures representing them. We don't want to create real
11669 tracepoints yet, we don't want to mess up the user's existing
11670 collection. */
11671
11672 static int
11673 remote_upload_tracepoints (struct target_ops *self, struct uploaded_tp **utpp)
11674 {
11675 struct remote_state *rs = get_remote_state ();
11676 char *p;
11677
11678 /* Ask for a first packet of tracepoint definition. */
11679 putpkt ("qTfP");
11680 getpkt (&rs->buf, &rs->buf_size, 0);
11681 p = rs->buf;
11682 while (*p && *p != 'l')
11683 {
11684 parse_tracepoint_definition (p, utpp);
11685 /* Ask for another packet of tracepoint definition. */
11686 putpkt ("qTsP");
11687 getpkt (&rs->buf, &rs->buf_size, 0);
11688 p = rs->buf;
11689 }
11690 return 0;
11691 }
11692
11693 static int
11694 remote_upload_trace_state_variables (struct target_ops *self,
11695 struct uploaded_tsv **utsvp)
11696 {
11697 struct remote_state *rs = get_remote_state ();
11698 char *p;
11699
11700 /* Ask for a first packet of variable definition. */
11701 putpkt ("qTfV");
11702 getpkt (&rs->buf, &rs->buf_size, 0);
11703 p = rs->buf;
11704 while (*p && *p != 'l')
11705 {
11706 parse_tsv_definition (p, utsvp);
11707 /* Ask for another packet of variable definition. */
11708 putpkt ("qTsV");
11709 getpkt (&rs->buf, &rs->buf_size, 0);
11710 p = rs->buf;
11711 }
11712 return 0;
11713 }
11714
11715 /* The "set/show range-stepping" show hook. */
11716
11717 static void
11718 show_range_stepping (struct ui_file *file, int from_tty,
11719 struct cmd_list_element *c,
11720 const char *value)
11721 {
11722 fprintf_filtered (file,
11723 _("Debugger's willingness to use range stepping "
11724 "is %s.\n"), value);
11725 }
11726
11727 /* The "set/show range-stepping" set hook. */
11728
11729 static void
11730 set_range_stepping (char *ignore_args, int from_tty,
11731 struct cmd_list_element *c)
11732 {
11733 struct remote_state *rs = get_remote_state ();
11734
11735 /* Whene enabling, check whether range stepping is actually
11736 supported by the target, and warn if not. */
11737 if (use_range_stepping)
11738 {
11739 if (rs->remote_desc != NULL)
11740 {
11741 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
11742 remote_vcont_probe (rs);
11743
11744 if (packet_support (PACKET_vCont) == PACKET_ENABLE
11745 && rs->supports_vCont.r)
11746 return;
11747 }
11748
11749 warning (_("Range stepping is not supported by the current target"));
11750 }
11751 }
11752
11753 void
11754 _initialize_remote (void)
11755 {
11756 struct remote_state *rs;
11757 struct cmd_list_element *cmd;
11758 const char *cmd_name;
11759
11760 /* architecture specific data */
11761 remote_gdbarch_data_handle =
11762 gdbarch_data_register_post_init (init_remote_state);
11763 remote_g_packet_data_handle =
11764 gdbarch_data_register_pre_init (remote_g_packet_data_init);
11765
11766 /* Initialize the per-target state. At the moment there is only one
11767 of these, not one per target. Only one target is active at a
11768 time. */
11769 remote_state = new_remote_state ();
11770
11771 init_remote_ops ();
11772 add_target (&remote_ops);
11773
11774 init_extended_remote_ops ();
11775 add_target (&extended_remote_ops);
11776
11777 /* Hook into new objfile notification. */
11778 observer_attach_new_objfile (remote_new_objfile);
11779 /* We're no longer interested in notification events of an inferior
11780 when it exits. */
11781 observer_attach_inferior_exit (discard_pending_stop_replies);
11782
11783 /* Set up signal handlers. */
11784 async_sigint_remote_token =
11785 create_async_signal_handler (async_remote_interrupt, NULL);
11786 async_sigint_remote_twice_token =
11787 create_async_signal_handler (async_remote_interrupt_twice, NULL);
11788
11789 #if 0
11790 init_remote_threadtests ();
11791 #endif
11792
11793 stop_reply_queue = QUEUE_alloc (stop_reply_p, stop_reply_xfree);
11794 /* set/show remote ... */
11795
11796 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
11797 Remote protocol specific variables\n\
11798 Configure various remote-protocol specific variables such as\n\
11799 the packets being used"),
11800 &remote_set_cmdlist, "set remote ",
11801 0 /* allow-unknown */, &setlist);
11802 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
11803 Remote protocol specific variables\n\
11804 Configure various remote-protocol specific variables such as\n\
11805 the packets being used"),
11806 &remote_show_cmdlist, "show remote ",
11807 0 /* allow-unknown */, &showlist);
11808
11809 add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
11810 Compare section data on target to the exec file.\n\
11811 Argument is a single section name (default: all loaded sections).\n\
11812 To compare only read-only loaded sections, specify the -r option."),
11813 &cmdlist);
11814
11815 add_cmd ("packet", class_maintenance, packet_command, _("\
11816 Send an arbitrary packet to a remote target.\n\
11817 maintenance packet TEXT\n\
11818 If GDB is talking to an inferior via the GDB serial protocol, then\n\
11819 this command sends the string TEXT to the inferior, and displays the\n\
11820 response packet. GDB supplies the initial `$' character, and the\n\
11821 terminating `#' character and checksum."),
11822 &maintenancelist);
11823
11824 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
11825 Set whether to send break if interrupted."), _("\
11826 Show whether to send break if interrupted."), _("\
11827 If set, a break, instead of a cntrl-c, is sent to the remote target."),
11828 set_remotebreak, show_remotebreak,
11829 &setlist, &showlist);
11830 cmd_name = "remotebreak";
11831 cmd = lookup_cmd (&cmd_name, setlist, "", -1, 1);
11832 deprecate_cmd (cmd, "set remote interrupt-sequence");
11833 cmd_name = "remotebreak"; /* needed because lookup_cmd updates the pointer */
11834 cmd = lookup_cmd (&cmd_name, showlist, "", -1, 1);
11835 deprecate_cmd (cmd, "show remote interrupt-sequence");
11836
11837 add_setshow_enum_cmd ("interrupt-sequence", class_support,
11838 interrupt_sequence_modes, &interrupt_sequence_mode,
11839 _("\
11840 Set interrupt sequence to remote target."), _("\
11841 Show interrupt sequence to remote target."), _("\
11842 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
11843 NULL, show_interrupt_sequence,
11844 &remote_set_cmdlist,
11845 &remote_show_cmdlist);
11846
11847 add_setshow_boolean_cmd ("interrupt-on-connect", class_support,
11848 &interrupt_on_connect, _("\
11849 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
11850 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
11851 If set, interrupt sequence is sent to remote target."),
11852 NULL, NULL,
11853 &remote_set_cmdlist, &remote_show_cmdlist);
11854
11855 /* Install commands for configuring memory read/write packets. */
11856
11857 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
11858 Set the maximum number of bytes per memory write packet (deprecated)."),
11859 &setlist);
11860 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
11861 Show the maximum number of bytes per memory write packet (deprecated)."),
11862 &showlist);
11863 add_cmd ("memory-write-packet-size", no_class,
11864 set_memory_write_packet_size, _("\
11865 Set the maximum number of bytes per memory-write packet.\n\
11866 Specify the number of bytes in a packet or 0 (zero) for the\n\
11867 default packet size. The actual limit is further reduced\n\
11868 dependent on the target. Specify ``fixed'' to disable the\n\
11869 further restriction and ``limit'' to enable that restriction."),
11870 &remote_set_cmdlist);
11871 add_cmd ("memory-read-packet-size", no_class,
11872 set_memory_read_packet_size, _("\
11873 Set the maximum number of bytes per memory-read packet.\n\
11874 Specify the number of bytes in a packet or 0 (zero) for the\n\
11875 default packet size. The actual limit is further reduced\n\
11876 dependent on the target. Specify ``fixed'' to disable the\n\
11877 further restriction and ``limit'' to enable that restriction."),
11878 &remote_set_cmdlist);
11879 add_cmd ("memory-write-packet-size", no_class,
11880 show_memory_write_packet_size,
11881 _("Show the maximum number of bytes per memory-write packet."),
11882 &remote_show_cmdlist);
11883 add_cmd ("memory-read-packet-size", no_class,
11884 show_memory_read_packet_size,
11885 _("Show the maximum number of bytes per memory-read packet."),
11886 &remote_show_cmdlist);
11887
11888 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class,
11889 &remote_hw_watchpoint_limit, _("\
11890 Set the maximum number of target hardware watchpoints."), _("\
11891 Show the maximum number of target hardware watchpoints."), _("\
11892 Specify a negative limit for unlimited."),
11893 NULL, NULL, /* FIXME: i18n: The maximum
11894 number of target hardware
11895 watchpoints is %s. */
11896 &remote_set_cmdlist, &remote_show_cmdlist);
11897 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class,
11898 &remote_hw_watchpoint_length_limit, _("\
11899 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
11900 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
11901 Specify a negative limit for unlimited."),
11902 NULL, NULL, /* FIXME: i18n: The maximum
11903 length (in bytes) of a target
11904 hardware watchpoint is %s. */
11905 &remote_set_cmdlist, &remote_show_cmdlist);
11906 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class,
11907 &remote_hw_breakpoint_limit, _("\
11908 Set the maximum number of target hardware breakpoints."), _("\
11909 Show the maximum number of target hardware breakpoints."), _("\
11910 Specify a negative limit for unlimited."),
11911 NULL, NULL, /* FIXME: i18n: The maximum
11912 number of target hardware
11913 breakpoints is %s. */
11914 &remote_set_cmdlist, &remote_show_cmdlist);
11915
11916 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure,
11917 &remote_address_size, _("\
11918 Set the maximum size of the address (in bits) in a memory packet."), _("\
11919 Show the maximum size of the address (in bits) in a memory packet."), NULL,
11920 NULL,
11921 NULL, /* FIXME: i18n: */
11922 &setlist, &showlist);
11923
11924 init_all_packet_configs ();
11925
11926 add_packet_config_cmd (&remote_protocol_packets[PACKET_X],
11927 "X", "binary-download", 1);
11928
11929 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont],
11930 "vCont", "verbose-resume", 0);
11931
11932 add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals],
11933 "QPassSignals", "pass-signals", 0);
11934
11935 add_packet_config_cmd (&remote_protocol_packets[PACKET_QProgramSignals],
11936 "QProgramSignals", "program-signals", 0);
11937
11938 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol],
11939 "qSymbol", "symbol-lookup", 0);
11940
11941 add_packet_config_cmd (&remote_protocol_packets[PACKET_P],
11942 "P", "set-register", 1);
11943
11944 add_packet_config_cmd (&remote_protocol_packets[PACKET_p],
11945 "p", "fetch-register", 1);
11946
11947 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0],
11948 "Z0", "software-breakpoint", 0);
11949
11950 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1],
11951 "Z1", "hardware-breakpoint", 0);
11952
11953 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2],
11954 "Z2", "write-watchpoint", 0);
11955
11956 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3],
11957 "Z3", "read-watchpoint", 0);
11958
11959 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4],
11960 "Z4", "access-watchpoint", 0);
11961
11962 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv],
11963 "qXfer:auxv:read", "read-aux-vector", 0);
11964
11965 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features],
11966 "qXfer:features:read", "target-features", 0);
11967
11968 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries],
11969 "qXfer:libraries:read", "library-info", 0);
11970
11971 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries_svr4],
11972 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
11973
11974 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map],
11975 "qXfer:memory-map:read", "memory-map", 0);
11976
11977 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read],
11978 "qXfer:spu:read", "read-spu-object", 0);
11979
11980 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write],
11981 "qXfer:spu:write", "write-spu-object", 0);
11982
11983 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata],
11984 "qXfer:osdata:read", "osdata", 0);
11985
11986 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_threads],
11987 "qXfer:threads:read", "threads", 0);
11988
11989 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read],
11990 "qXfer:siginfo:read", "read-siginfo-object", 0);
11991
11992 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write],
11993 "qXfer:siginfo:write", "write-siginfo-object", 0);
11994
11995 add_packet_config_cmd
11996 (&remote_protocol_packets[PACKET_qXfer_traceframe_info],
11997 "qXfer:traceframe-info:read", "traceframe-info", 0);
11998
11999 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_uib],
12000 "qXfer:uib:read", "unwind-info-block", 0);
12001
12002 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
12003 "qGetTLSAddr", "get-thread-local-storage-address",
12004 0);
12005
12006 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTIBAddr],
12007 "qGetTIBAddr", "get-thread-information-block-address",
12008 0);
12009
12010 add_packet_config_cmd (&remote_protocol_packets[PACKET_bc],
12011 "bc", "reverse-continue", 0);
12012
12013 add_packet_config_cmd (&remote_protocol_packets[PACKET_bs],
12014 "bs", "reverse-step", 0);
12015
12016 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported],
12017 "qSupported", "supported-packets", 0);
12018
12019 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory],
12020 "qSearch:memory", "search-memory", 0);
12021
12022 add_packet_config_cmd (&remote_protocol_packets[PACKET_qTStatus],
12023 "qTStatus", "trace-status", 0);
12024
12025 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open],
12026 "vFile:open", "hostio-open", 0);
12027
12028 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread],
12029 "vFile:pread", "hostio-pread", 0);
12030
12031 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite],
12032 "vFile:pwrite", "hostio-pwrite", 0);
12033
12034 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close],
12035 "vFile:close", "hostio-close", 0);
12036
12037 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink],
12038 "vFile:unlink", "hostio-unlink", 0);
12039
12040 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_readlink],
12041 "vFile:readlink", "hostio-readlink", 0);
12042
12043 add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach],
12044 "vAttach", "attach", 0);
12045
12046 add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
12047 "vRun", "run", 0);
12048
12049 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode],
12050 "QStartNoAckMode", "noack", 0);
12051
12052 add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill],
12053 "vKill", "kill", 0);
12054
12055 add_packet_config_cmd (&remote_protocol_packets[PACKET_qAttached],
12056 "qAttached", "query-attached", 0);
12057
12058 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalTracepoints],
12059 "ConditionalTracepoints",
12060 "conditional-tracepoints", 0);
12061
12062 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalBreakpoints],
12063 "ConditionalBreakpoints",
12064 "conditional-breakpoints", 0);
12065
12066 add_packet_config_cmd (&remote_protocol_packets[PACKET_BreakpointCommands],
12067 "BreakpointCommands",
12068 "breakpoint-commands", 0);
12069
12070 add_packet_config_cmd (&remote_protocol_packets[PACKET_FastTracepoints],
12071 "FastTracepoints", "fast-tracepoints", 0);
12072
12073 add_packet_config_cmd (&remote_protocol_packets[PACKET_TracepointSource],
12074 "TracepointSource", "TracepointSource", 0);
12075
12076 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAllow],
12077 "QAllow", "allow", 0);
12078
12079 add_packet_config_cmd (&remote_protocol_packets[PACKET_StaticTracepoints],
12080 "StaticTracepoints", "static-tracepoints", 0);
12081
12082 add_packet_config_cmd (&remote_protocol_packets[PACKET_InstallInTrace],
12083 "InstallInTrace", "install-in-trace", 0);
12084
12085 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_statictrace_read],
12086 "qXfer:statictrace:read", "read-sdata-object", 0);
12087
12088 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_fdpic],
12089 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
12090
12091 add_packet_config_cmd (&remote_protocol_packets[PACKET_QDisableRandomization],
12092 "QDisableRandomization", "disable-randomization", 0);
12093
12094 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAgent],
12095 "QAgent", "agent", 0);
12096
12097 add_packet_config_cmd (&remote_protocol_packets[PACKET_QTBuffer_size],
12098 "QTBuffer:size", "trace-buffer-size", 0);
12099
12100 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_off],
12101 "Qbtrace:off", "disable-btrace", 0);
12102
12103 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_bts],
12104 "Qbtrace:bts", "enable-btrace", 0);
12105
12106 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace],
12107 "qXfer:btrace", "read-btrace", 0);
12108
12109 /* Assert that we've registered commands for all packet configs. */
12110 {
12111 int i;
12112
12113 for (i = 0; i < PACKET_MAX; i++)
12114 {
12115 /* Ideally all configs would have a command associated. Some
12116 still don't though. */
12117 int excepted;
12118
12119 switch (i)
12120 {
12121 case PACKET_QNonStop:
12122 case PACKET_multiprocess_feature:
12123 case PACKET_EnableDisableTracepoints_feature:
12124 case PACKET_tracenz_feature:
12125 case PACKET_DisconnectedTracing_feature:
12126 case PACKET_augmented_libraries_svr4_read_feature:
12127 case PACKET_qCRC:
12128 /* Additions to this list need to be well justified:
12129 pre-existing packets are OK; new packets are not. */
12130 excepted = 1;
12131 break;
12132 default:
12133 excepted = 0;
12134 break;
12135 }
12136
12137 /* This catches both forgetting to add a config command, and
12138 forgetting to remove a packet from the exception list. */
12139 gdb_assert (excepted == (remote_protocol_packets[i].name == NULL));
12140 }
12141 }
12142
12143 /* Keep the old ``set remote Z-packet ...'' working. Each individual
12144 Z sub-packet has its own set and show commands, but users may
12145 have sets to this variable in their .gdbinit files (or in their
12146 documentation). */
12147 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
12148 &remote_Z_packet_detect, _("\
12149 Set use of remote protocol `Z' packets"), _("\
12150 Show use of remote protocol `Z' packets "), _("\
12151 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
12152 packets."),
12153 set_remote_protocol_Z_packet_cmd,
12154 show_remote_protocol_Z_packet_cmd,
12155 /* FIXME: i18n: Use of remote protocol
12156 `Z' packets is %s. */
12157 &remote_set_cmdlist, &remote_show_cmdlist);
12158
12159 add_prefix_cmd ("remote", class_files, remote_command, _("\
12160 Manipulate files on the remote system\n\
12161 Transfer files to and from the remote target system."),
12162 &remote_cmdlist, "remote ",
12163 0 /* allow-unknown */, &cmdlist);
12164
12165 add_cmd ("put", class_files, remote_put_command,
12166 _("Copy a local file to the remote system."),
12167 &remote_cmdlist);
12168
12169 add_cmd ("get", class_files, remote_get_command,
12170 _("Copy a remote file to the local system."),
12171 &remote_cmdlist);
12172
12173 add_cmd ("delete", class_files, remote_delete_command,
12174 _("Delete a remote file."),
12175 &remote_cmdlist);
12176
12177 remote_exec_file = xstrdup ("");
12178 add_setshow_string_noescape_cmd ("exec-file", class_files,
12179 &remote_exec_file, _("\
12180 Set the remote pathname for \"run\""), _("\
12181 Show the remote pathname for \"run\""), NULL, NULL, NULL,
12182 &remote_set_cmdlist, &remote_show_cmdlist);
12183
12184 add_setshow_boolean_cmd ("range-stepping", class_run,
12185 &use_range_stepping, _("\
12186 Enable or disable range stepping."), _("\
12187 Show whether target-assisted range stepping is enabled."), _("\
12188 If on, and the target supports it, when stepping a source line, GDB\n\
12189 tells the target to step the corresponding range of addresses itself instead\n\
12190 of issuing multiple single-steps. This speeds up source level\n\
12191 stepping. If off, GDB always issues single-steps, even if range\n\
12192 stepping is supported by the target. The default is on."),
12193 set_range_stepping,
12194 show_range_stepping,
12195 &setlist,
12196 &showlist);
12197
12198 /* Eventually initialize fileio. See fileio.c */
12199 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
12200
12201 /* Take advantage of the fact that the TID field is not used, to tag
12202 special ptids with it set to != 0. */
12203 magic_null_ptid = ptid_build (42000, -1, 1);
12204 not_sent_ptid = ptid_build (42000, -2, 1);
12205 any_thread_ptid = ptid_build (42000, 0, 1);
12206
12207 target_buf_size = 2048;
12208 target_buf = xmalloc (target_buf_size);
12209 }
12210
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