1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
4 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 /* See the GDB User Guide for details of the GDB remote protocol. */
25 #include "gdb_string.h"
31 #include "exceptions.h"
33 /*#include "terminal.h" */
36 #include "gdb-stabs.h"
37 #include "gdbthread.h"
41 #include "gdb_assert.h"
44 #include "cli/cli-decode.h"
45 #include "cli/cli-setshow.h"
46 #include "target-descriptions.h"
51 #include "event-loop.h"
52 #include "event-top.h"
58 #include "gdbcore.h" /* for exec_bfd */
60 #include "remote-fileio.h"
61 #include "gdb/fileio.h"
64 #include "memory-map.h"
66 /* The size to align memory write packets, when practical. The protocol
67 does not guarantee any alignment, and gdb will generate short
68 writes and unaligned writes, but even as a best-effort attempt this
69 can improve bulk transfers. For instance, if a write is misaligned
70 relative to the target's data bus, the stub may need to make an extra
71 round trip fetching data from the target. This doesn't make a
72 huge difference, but it's easy to do, so we try to be helpful.
74 The alignment chosen is arbitrary; usually data bus width is
75 important here, not the possibly larger cache line size. */
76 enum { REMOTE_ALIGN_WRITES = 16 };
78 /* Prototypes for local functions. */
79 static void cleanup_sigint_signal_handler (void *dummy);
80 static void initialize_sigint_signal_handler (void);
81 static int getpkt_sane (char **buf, long *sizeof_buf, int forever);
82 static int getpkt_or_notif_sane (char **buf, long *sizeof_buf,
85 static void handle_remote_sigint (int);
86 static void handle_remote_sigint_twice (int);
87 static void async_remote_interrupt (gdb_client_data);
88 void async_remote_interrupt_twice (gdb_client_data);
90 static void remote_files_info (struct target_ops *ignore);
92 static void remote_prepare_to_store (struct regcache *regcache);
94 static void remote_fetch_registers (struct regcache *regcache, int regno);
96 static void remote_resume (ptid_t ptid, int step,
97 enum target_signal siggnal);
98 static void remote_open (char *name, int from_tty);
100 static void extended_remote_open (char *name, int from_tty);
102 static void remote_open_1 (char *, int, struct target_ops *, int extended_p);
104 static void remote_close (int quitting);
106 static void remote_store_registers (struct regcache *regcache, int regno);
108 static void remote_mourn (struct target_ops *ops);
110 static void extended_remote_restart (void);
112 static void extended_remote_mourn (struct target_ops *);
114 static void remote_mourn_1 (struct target_ops *);
116 static void remote_send (char **buf, long *sizeof_buf_p);
118 static int readchar (int timeout);
120 static ptid_t remote_wait (ptid_t ptid,
121 struct target_waitstatus *status);
123 static void remote_kill (void);
125 static int tohex (int nib);
127 static int remote_can_async_p (void);
129 static int remote_is_async_p (void);
131 static void remote_async (void (*callback) (enum inferior_event_type event_type,
132 void *context), void *context);
134 static int remote_async_mask (int new_mask);
136 static void remote_detach (struct target_ops *ops, char *args, int from_tty);
138 static void remote_interrupt (int signo);
140 static void remote_interrupt_twice (int signo);
142 static void interrupt_query (void);
144 static void set_general_thread (struct ptid ptid);
145 static void set_continue_thread (struct ptid ptid);
147 static int remote_thread_alive (ptid_t);
149 static void get_offsets (void);
151 static void skip_frame (void);
153 static long read_frame (char **buf_p, long *sizeof_buf);
155 static int hexnumlen (ULONGEST num);
157 static void init_remote_ops (void);
159 static void init_extended_remote_ops (void);
161 static void remote_stop (ptid_t);
163 static int ishex (int ch, int *val);
165 static int stubhex (int ch);
167 static int hexnumstr (char *, ULONGEST);
169 static int hexnumnstr (char *, ULONGEST, int);
171 static CORE_ADDR remote_address_masked (CORE_ADDR);
173 static void print_packet (char *);
175 static unsigned long crc32 (unsigned char *, int, unsigned int);
177 static void compare_sections_command (char *, int);
179 static void packet_command (char *, int);
181 static int stub_unpack_int (char *buff, int fieldlength);
183 static ptid_t remote_current_thread (ptid_t oldptid);
185 static void remote_find_new_threads (void);
187 static void record_currthread (ptid_t currthread);
189 static int fromhex (int a);
191 static int hex2bin (const char *hex, gdb_byte *bin, int count);
193 static int bin2hex (const gdb_byte *bin, char *hex, int count);
195 static int putpkt_binary (char *buf, int cnt);
197 static void check_binary_download (CORE_ADDR addr);
199 struct packet_config;
201 static void show_packet_config_cmd (struct packet_config *config);
203 static void update_packet_config (struct packet_config *config);
205 static void set_remote_protocol_packet_cmd (char *args, int from_tty,
206 struct cmd_list_element *c);
208 static void show_remote_protocol_packet_cmd (struct ui_file *file,
210 struct cmd_list_element *c,
213 static char *write_ptid (char *buf, const char *endbuf, ptid_t ptid);
214 static ptid_t read_ptid (char *buf, char **obuf);
216 static void remote_query_supported (void);
218 static void remote_check_symbols (struct objfile *objfile);
220 void _initialize_remote (void);
223 static struct stop_reply *stop_reply_xmalloc (void);
224 static void stop_reply_xfree (struct stop_reply *);
225 static void do_stop_reply_xfree (void *arg);
226 static void remote_parse_stop_reply (char *buf, struct stop_reply *);
227 static void push_stop_reply (struct stop_reply *);
228 static void remote_get_pending_stop_replies (void);
229 static void discard_pending_stop_replies (int pid);
230 static int peek_stop_reply (ptid_t ptid);
232 static void remote_async_inferior_event_handler (gdb_client_data);
233 static void remote_async_get_pending_events_handler (gdb_client_data);
235 static void remote_terminal_ours (void);
237 static int remote_read_description_p (struct target_ops *target);
239 /* The non-stop remote protocol provisions for one pending stop reply.
240 This is where we keep it until it is acknowledged. */
242 static struct stop_reply *pending_stop_reply = NULL;
246 static struct cmd_list_element *remote_cmdlist;
248 /* For "set remote" and "show remote". */
250 static struct cmd_list_element *remote_set_cmdlist;
251 static struct cmd_list_element *remote_show_cmdlist;
253 /* Description of the remote protocol state for the currently
254 connected target. This is per-target state, and independent of the
255 selected architecture. */
259 /* A buffer to use for incoming packets, and its current size. The
260 buffer is grown dynamically for larger incoming packets.
261 Outgoing packets may also be constructed in this buffer.
262 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
263 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
268 /* If we negotiated packet size explicitly (and thus can bypass
269 heuristics for the largest packet size that will not overflow
270 a buffer in the stub), this will be set to that packet size.
271 Otherwise zero, meaning to use the guessed size. */
272 long explicit_packet_size;
274 /* remote_wait is normally called when the target is running and
275 waits for a stop reply packet. But sometimes we need to call it
276 when the target is already stopped. We can send a "?" packet
277 and have remote_wait read the response. Or, if we already have
278 the response, we can stash it in BUF and tell remote_wait to
279 skip calling getpkt. This flag is set when BUF contains a
280 stop reply packet and the target is not waiting. */
281 int cached_wait_status;
283 /* True, if in no ack mode. That is, neither GDB nor the stub will
284 expect acks from each other. The connection is assumed to be
288 /* True if we're connected in extended remote mode. */
291 /* True if the stub reported support for multi-process
293 int multi_process_aware;
295 /* True if we resumed the target and we're waiting for the target to
296 stop. In the mean time, we can't start another command/query.
297 The remote server wouldn't be ready to process it, so we'd
298 timeout waiting for a reply that would never come and eventually
299 we'd close the connection. This can happen in asynchronous mode
300 because we allow GDB commands while the target is running. */
301 int waiting_for_stop_reply;
303 /* True if the stub reports support for non-stop mode. */
306 /* True if the stub reports support for vCont;t. */
310 /* Returns true if the multi-process extensions are in effect. */
312 remote_multi_process_p (struct remote_state *rs)
314 return rs->extended && rs->multi_process_aware;
317 /* This data could be associated with a target, but we do not always
318 have access to the current target when we need it, so for now it is
319 static. This will be fine for as long as only one target is in use
321 static struct remote_state remote_state;
323 static struct remote_state *
324 get_remote_state_raw (void)
326 return &remote_state;
329 /* Description of the remote protocol for a given architecture. */
333 long offset; /* Offset into G packet. */
334 long regnum; /* GDB's internal register number. */
335 LONGEST pnum; /* Remote protocol register number. */
336 int in_g_packet; /* Always part of G packet. */
337 /* long size in bytes; == register_size (target_gdbarch, regnum);
339 /* char *name; == gdbarch_register_name (target_gdbarch, regnum);
343 struct remote_arch_state
345 /* Description of the remote protocol registers. */
346 long sizeof_g_packet;
348 /* Description of the remote protocol registers indexed by REGNUM
349 (making an array gdbarch_num_regs in size). */
350 struct packet_reg *regs;
352 /* This is the size (in chars) of the first response to the ``g''
353 packet. It is used as a heuristic when determining the maximum
354 size of memory-read and memory-write packets. A target will
355 typically only reserve a buffer large enough to hold the ``g''
356 packet. The size does not include packet overhead (headers and
358 long actual_register_packet_size;
360 /* This is the maximum size (in chars) of a non read/write packet.
361 It is also used as a cap on the size of read/write packets. */
362 long remote_packet_size;
366 /* Handle for retreving the remote protocol data from gdbarch. */
367 static struct gdbarch_data *remote_gdbarch_data_handle;
369 static struct remote_arch_state *
370 get_remote_arch_state (void)
372 return gdbarch_data (target_gdbarch, remote_gdbarch_data_handle);
375 /* Fetch the global remote target state. */
377 static struct remote_state *
378 get_remote_state (void)
380 /* Make sure that the remote architecture state has been
381 initialized, because doing so might reallocate rs->buf. Any
382 function which calls getpkt also needs to be mindful of changes
383 to rs->buf, but this call limits the number of places which run
385 get_remote_arch_state ();
387 return get_remote_state_raw ();
391 compare_pnums (const void *lhs_, const void *rhs_)
393 const struct packet_reg * const *lhs = lhs_;
394 const struct packet_reg * const *rhs = rhs_;
396 if ((*lhs)->pnum < (*rhs)->pnum)
398 else if ((*lhs)->pnum == (*rhs)->pnum)
405 init_remote_state (struct gdbarch *gdbarch)
407 int regnum, num_remote_regs, offset;
408 struct remote_state *rs = get_remote_state_raw ();
409 struct remote_arch_state *rsa;
410 struct packet_reg **remote_regs;
412 rsa = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_arch_state);
414 /* Use the architecture to build a regnum<->pnum table, which will be
415 1:1 unless a feature set specifies otherwise. */
416 rsa->regs = GDBARCH_OBSTACK_CALLOC (gdbarch,
417 gdbarch_num_regs (gdbarch),
419 for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++)
421 struct packet_reg *r = &rsa->regs[regnum];
423 if (register_size (gdbarch, regnum) == 0)
424 /* Do not try to fetch zero-sized (placeholder) registers. */
427 r->pnum = gdbarch_remote_register_number (gdbarch, regnum);
432 /* Define the g/G packet format as the contents of each register
433 with a remote protocol number, in order of ascending protocol
436 remote_regs = alloca (gdbarch_num_regs (gdbarch)
437 * sizeof (struct packet_reg *));
438 for (num_remote_regs = 0, regnum = 0;
439 regnum < gdbarch_num_regs (gdbarch);
441 if (rsa->regs[regnum].pnum != -1)
442 remote_regs[num_remote_regs++] = &rsa->regs[regnum];
444 qsort (remote_regs, num_remote_regs, sizeof (struct packet_reg *),
447 for (regnum = 0, offset = 0; regnum < num_remote_regs; regnum++)
449 remote_regs[regnum]->in_g_packet = 1;
450 remote_regs[regnum]->offset = offset;
451 offset += register_size (gdbarch, remote_regs[regnum]->regnum);
454 /* Record the maximum possible size of the g packet - it may turn out
456 rsa->sizeof_g_packet = offset;
458 /* Default maximum number of characters in a packet body. Many
459 remote stubs have a hardwired buffer size of 400 bytes
460 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
461 as the maximum packet-size to ensure that the packet and an extra
462 NUL character can always fit in the buffer. This stops GDB
463 trashing stubs that try to squeeze an extra NUL into what is
464 already a full buffer (As of 1999-12-04 that was most stubs). */
465 rsa->remote_packet_size = 400 - 1;
467 /* This one is filled in when a ``g'' packet is received. */
468 rsa->actual_register_packet_size = 0;
470 /* Should rsa->sizeof_g_packet needs more space than the
471 default, adjust the size accordingly. Remember that each byte is
472 encoded as two characters. 32 is the overhead for the packet
473 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
474 (``$NN:G...#NN'') is a better guess, the below has been padded a
476 if (rsa->sizeof_g_packet > ((rsa->remote_packet_size - 32) / 2))
477 rsa->remote_packet_size = (rsa->sizeof_g_packet * 2 + 32);
479 /* Make sure that the packet buffer is plenty big enough for
480 this architecture. */
481 if (rs->buf_size < rsa->remote_packet_size)
483 rs->buf_size = 2 * rsa->remote_packet_size;
484 rs->buf = xrealloc (rs->buf, rs->buf_size);
490 /* Return the current allowed size of a remote packet. This is
491 inferred from the current architecture, and should be used to
492 limit the length of outgoing packets. */
494 get_remote_packet_size (void)
496 struct remote_state *rs = get_remote_state ();
497 struct remote_arch_state *rsa = get_remote_arch_state ();
499 if (rs->explicit_packet_size)
500 return rs->explicit_packet_size;
502 return rsa->remote_packet_size;
505 static struct packet_reg *
506 packet_reg_from_regnum (struct remote_arch_state *rsa, long regnum)
508 if (regnum < 0 && regnum >= gdbarch_num_regs (target_gdbarch))
512 struct packet_reg *r = &rsa->regs[regnum];
513 gdb_assert (r->regnum == regnum);
518 static struct packet_reg *
519 packet_reg_from_pnum (struct remote_arch_state *rsa, LONGEST pnum)
522 for (i = 0; i < gdbarch_num_regs (target_gdbarch); i++)
524 struct packet_reg *r = &rsa->regs[i];
531 /* FIXME: graces/2002-08-08: These variables should eventually be
532 bound to an instance of the target object (as in gdbarch-tdep()),
533 when such a thing exists. */
535 /* This is set to the data address of the access causing the target
536 to stop for a watchpoint. */
537 static CORE_ADDR remote_watch_data_address;
539 /* This is non-zero if target stopped for a watchpoint. */
540 static int remote_stopped_by_watchpoint_p;
542 static struct target_ops remote_ops;
544 static struct target_ops extended_remote_ops;
546 static int remote_async_mask_value = 1;
548 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
549 ``forever'' still use the normal timeout mechanism. This is
550 currently used by the ASYNC code to guarentee that target reads
551 during the initial connect always time-out. Once getpkt has been
552 modified to return a timeout indication and, in turn
553 remote_wait()/wait_for_inferior() have gained a timeout parameter
555 static int wait_forever_enabled_p = 1;
558 /* This variable chooses whether to send a ^C or a break when the user
559 requests program interruption. Although ^C is usually what remote
560 systems expect, and that is the default here, sometimes a break is
561 preferable instead. */
563 static int remote_break;
565 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
566 remote_open knows that we don't have a file open when the program
568 static struct serial *remote_desc = NULL;
570 /* This variable sets the number of bits in an address that are to be
571 sent in a memory ("M" or "m") packet. Normally, after stripping
572 leading zeros, the entire address would be sent. This variable
573 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
574 initial implementation of remote.c restricted the address sent in
575 memory packets to ``host::sizeof long'' bytes - (typically 32
576 bits). Consequently, for 64 bit targets, the upper 32 bits of an
577 address was never sent. Since fixing this bug may cause a break in
578 some remote targets this variable is principly provided to
579 facilitate backward compatibility. */
581 static int remote_address_size;
583 /* Temporary to track who currently owns the terminal. See
584 remote_terminal_* for more details. */
586 static int remote_async_terminal_ours_p;
588 /* The executable file to use for "run" on the remote side. */
590 static char *remote_exec_file = "";
593 /* User configurable variables for the number of characters in a
594 memory read/write packet. MIN (rsa->remote_packet_size,
595 rsa->sizeof_g_packet) is the default. Some targets need smaller
596 values (fifo overruns, et.al.) and some users need larger values
597 (speed up transfers). The variables ``preferred_*'' (the user
598 request), ``current_*'' (what was actually set) and ``forced_*''
599 (Positive - a soft limit, negative - a hard limit). */
601 struct memory_packet_config
608 /* Compute the current size of a read/write packet. Since this makes
609 use of ``actual_register_packet_size'' the computation is dynamic. */
612 get_memory_packet_size (struct memory_packet_config *config)
614 struct remote_state *rs = get_remote_state ();
615 struct remote_arch_state *rsa = get_remote_arch_state ();
617 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
618 law?) that some hosts don't cope very well with large alloca()
619 calls. Eventually the alloca() code will be replaced by calls to
620 xmalloc() and make_cleanups() allowing this restriction to either
621 be lifted or removed. */
622 #ifndef MAX_REMOTE_PACKET_SIZE
623 #define MAX_REMOTE_PACKET_SIZE 16384
625 /* NOTE: 20 ensures we can write at least one byte. */
626 #ifndef MIN_REMOTE_PACKET_SIZE
627 #define MIN_REMOTE_PACKET_SIZE 20
632 if (config->size <= 0)
633 what_they_get = MAX_REMOTE_PACKET_SIZE;
635 what_they_get = config->size;
639 what_they_get = get_remote_packet_size ();
640 /* Limit the packet to the size specified by the user. */
642 && what_they_get > config->size)
643 what_they_get = config->size;
645 /* Limit it to the size of the targets ``g'' response unless we have
646 permission from the stub to use a larger packet size. */
647 if (rs->explicit_packet_size == 0
648 && rsa->actual_register_packet_size > 0
649 && what_they_get > rsa->actual_register_packet_size)
650 what_they_get = rsa->actual_register_packet_size;
652 if (what_they_get > MAX_REMOTE_PACKET_SIZE)
653 what_they_get = MAX_REMOTE_PACKET_SIZE;
654 if (what_they_get < MIN_REMOTE_PACKET_SIZE)
655 what_they_get = MIN_REMOTE_PACKET_SIZE;
657 /* Make sure there is room in the global buffer for this packet
658 (including its trailing NUL byte). */
659 if (rs->buf_size < what_they_get + 1)
661 rs->buf_size = 2 * what_they_get;
662 rs->buf = xrealloc (rs->buf, 2 * what_they_get);
665 return what_they_get;
668 /* Update the size of a read/write packet. If they user wants
669 something really big then do a sanity check. */
672 set_memory_packet_size (char *args, struct memory_packet_config *config)
674 int fixed_p = config->fixed_p;
675 long size = config->size;
677 error (_("Argument required (integer, `fixed' or `limited')."));
678 else if (strcmp (args, "hard") == 0
679 || strcmp (args, "fixed") == 0)
681 else if (strcmp (args, "soft") == 0
682 || strcmp (args, "limit") == 0)
687 size = strtoul (args, &end, 0);
689 error (_("Invalid %s (bad syntax)."), config->name);
691 /* Instead of explicitly capping the size of a packet to
692 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
693 instead allowed to set the size to something arbitrarily
695 if (size > MAX_REMOTE_PACKET_SIZE)
696 error (_("Invalid %s (too large)."), config->name);
700 if (fixed_p && !config->fixed_p)
702 if (! query (_("The target may not be able to correctly handle a %s\n"
703 "of %ld bytes. Change the packet size? "),
705 error (_("Packet size not changed."));
707 /* Update the config. */
708 config->fixed_p = fixed_p;
713 show_memory_packet_size (struct memory_packet_config *config)
715 printf_filtered (_("The %s is %ld. "), config->name, config->size);
717 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
718 get_memory_packet_size (config));
720 printf_filtered (_("Packets are limited to %ld bytes.\n"),
721 get_memory_packet_size (config));
724 static struct memory_packet_config memory_write_packet_config =
726 "memory-write-packet-size",
730 set_memory_write_packet_size (char *args, int from_tty)
732 set_memory_packet_size (args, &memory_write_packet_config);
736 show_memory_write_packet_size (char *args, int from_tty)
738 show_memory_packet_size (&memory_write_packet_config);
742 get_memory_write_packet_size (void)
744 return get_memory_packet_size (&memory_write_packet_config);
747 static struct memory_packet_config memory_read_packet_config =
749 "memory-read-packet-size",
753 set_memory_read_packet_size (char *args, int from_tty)
755 set_memory_packet_size (args, &memory_read_packet_config);
759 show_memory_read_packet_size (char *args, int from_tty)
761 show_memory_packet_size (&memory_read_packet_config);
765 get_memory_read_packet_size (void)
767 long size = get_memory_packet_size (&memory_read_packet_config);
768 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
769 extra buffer size argument before the memory read size can be
770 increased beyond this. */
771 if (size > get_remote_packet_size ())
772 size = get_remote_packet_size ();
777 /* Generic configuration support for packets the stub optionally
778 supports. Allows the user to specify the use of the packet as well
779 as allowing GDB to auto-detect support in the remote stub. */
783 PACKET_SUPPORT_UNKNOWN = 0,
792 enum auto_boolean detect;
793 enum packet_support support;
796 /* Analyze a packet's return value and update the packet config
807 update_packet_config (struct packet_config *config)
809 switch (config->detect)
811 case AUTO_BOOLEAN_TRUE:
812 config->support = PACKET_ENABLE;
814 case AUTO_BOOLEAN_FALSE:
815 config->support = PACKET_DISABLE;
817 case AUTO_BOOLEAN_AUTO:
818 config->support = PACKET_SUPPORT_UNKNOWN;
824 show_packet_config_cmd (struct packet_config *config)
826 char *support = "internal-error";
827 switch (config->support)
833 support = "disabled";
835 case PACKET_SUPPORT_UNKNOWN:
839 switch (config->detect)
841 case AUTO_BOOLEAN_AUTO:
842 printf_filtered (_("Support for the `%s' packet is auto-detected, currently %s.\n"),
843 config->name, support);
845 case AUTO_BOOLEAN_TRUE:
846 case AUTO_BOOLEAN_FALSE:
847 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
848 config->name, support);
854 add_packet_config_cmd (struct packet_config *config, const char *name,
855 const char *title, int legacy)
862 config->title = title;
863 config->detect = AUTO_BOOLEAN_AUTO;
864 config->support = PACKET_SUPPORT_UNKNOWN;
865 set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet",
867 show_doc = xstrprintf ("Show current use of remote protocol `%s' (%s) packet",
869 /* set/show TITLE-packet {auto,on,off} */
870 cmd_name = xstrprintf ("%s-packet", title);
871 add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
872 &config->detect, set_doc, show_doc, NULL, /* help_doc */
873 set_remote_protocol_packet_cmd,
874 show_remote_protocol_packet_cmd,
875 &remote_set_cmdlist, &remote_show_cmdlist);
876 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
880 legacy_name = xstrprintf ("%s-packet", name);
881 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
882 &remote_set_cmdlist);
883 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
884 &remote_show_cmdlist);
888 static enum packet_result
889 packet_check_result (const char *buf)
893 /* The stub recognized the packet request. Check that the
894 operation succeeded. */
896 && isxdigit (buf[1]) && isxdigit (buf[2])
898 /* "Enn" - definitly an error. */
901 /* Always treat "E." as an error. This will be used for
902 more verbose error messages, such as E.memtypes. */
903 if (buf[0] == 'E' && buf[1] == '.')
906 /* The packet may or may not be OK. Just assume it is. */
910 /* The stub does not support the packet. */
911 return PACKET_UNKNOWN;
914 static enum packet_result
915 packet_ok (const char *buf, struct packet_config *config)
917 enum packet_result result;
919 result = packet_check_result (buf);
924 /* The stub recognized the packet request. */
925 switch (config->support)
927 case PACKET_SUPPORT_UNKNOWN:
929 fprintf_unfiltered (gdb_stdlog,
930 "Packet %s (%s) is supported\n",
931 config->name, config->title);
932 config->support = PACKET_ENABLE;
935 internal_error (__FILE__, __LINE__,
936 _("packet_ok: attempt to use a disabled packet"));
943 /* The stub does not support the packet. */
944 switch (config->support)
947 if (config->detect == AUTO_BOOLEAN_AUTO)
948 /* If the stub previously indicated that the packet was
949 supported then there is a protocol error.. */
950 error (_("Protocol error: %s (%s) conflicting enabled responses."),
951 config->name, config->title);
953 /* The user set it wrong. */
954 error (_("Enabled packet %s (%s) not recognized by stub"),
955 config->name, config->title);
957 case PACKET_SUPPORT_UNKNOWN:
959 fprintf_unfiltered (gdb_stdlog,
960 "Packet %s (%s) is NOT supported\n",
961 config->name, config->title);
962 config->support = PACKET_DISABLE;
990 PACKET_qXfer_features,
991 PACKET_qXfer_libraries,
992 PACKET_qXfer_memory_map,
993 PACKET_qXfer_spu_read,
994 PACKET_qXfer_spu_write,
999 PACKET_qSearch_memory,
1002 PACKET_QStartNoAckMode,
1007 static struct packet_config remote_protocol_packets[PACKET_MAX];
1010 set_remote_protocol_packet_cmd (char *args, int from_tty,
1011 struct cmd_list_element *c)
1013 struct packet_config *packet;
1015 for (packet = remote_protocol_packets;
1016 packet < &remote_protocol_packets[PACKET_MAX];
1019 if (&packet->detect == c->var)
1021 update_packet_config (packet);
1025 internal_error (__FILE__, __LINE__, "Could not find config for %s",
1030 show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty,
1031 struct cmd_list_element *c,
1034 struct packet_config *packet;
1036 for (packet = remote_protocol_packets;
1037 packet < &remote_protocol_packets[PACKET_MAX];
1040 if (&packet->detect == c->var)
1042 show_packet_config_cmd (packet);
1046 internal_error (__FILE__, __LINE__, "Could not find config for %s",
1050 /* Should we try one of the 'Z' requests? */
1054 Z_PACKET_SOFTWARE_BP,
1055 Z_PACKET_HARDWARE_BP,
1062 /* For compatibility with older distributions. Provide a ``set remote
1063 Z-packet ...'' command that updates all the Z packet types. */
1065 static enum auto_boolean remote_Z_packet_detect;
1068 set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
1069 struct cmd_list_element *c)
1072 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1074 remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect;
1075 update_packet_config (&remote_protocol_packets[PACKET_Z0 + i]);
1080 show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty,
1081 struct cmd_list_element *c,
1085 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1087 show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]);
1091 /* Should we try the 'ThreadInfo' query packet?
1093 This variable (NOT available to the user: auto-detect only!)
1094 determines whether GDB will use the new, simpler "ThreadInfo"
1095 query or the older, more complex syntax for thread queries.
1096 This is an auto-detect variable (set to true at each connect,
1097 and set to false when the target fails to recognize it). */
1099 static int use_threadinfo_query;
1100 static int use_threadextra_query;
1102 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1103 static struct async_signal_handler *sigint_remote_twice_token;
1104 static struct async_signal_handler *sigint_remote_token;
1107 /* Asynchronous signal handle registered as event loop source for
1108 when we have pending events ready to be passed to the core. */
1110 static struct async_event_handler *remote_async_inferior_event_token;
1112 /* Asynchronous signal handle registered as event loop source for when
1113 the remote sent us a %Stop notification. The registered callback
1114 will do a vStopped sequence to pull the rest of the events out of
1115 the remote side into our event queue. */
1117 static struct async_event_handler *remote_async_get_pending_events_token;
1120 static ptid_t magic_null_ptid;
1121 static ptid_t not_sent_ptid;
1122 static ptid_t any_thread_ptid;
1124 /* These are the threads which we last sent to the remote system. The
1125 TID member will be -1 for all or -2 for not sent yet. */
1127 static ptid_t general_thread;
1128 static ptid_t continue_thread;
1131 notice_new_inferiors (ptid_t currthread)
1133 /* If this is a new thread, add it to GDB's thread list.
1134 If we leave it up to WFI to do this, bad things will happen. */
1136 if (in_thread_list (currthread) && is_exited (currthread))
1138 /* We're seeing an event on a thread id we knew had exited.
1139 This has to be a new thread reusing the old id. Add it. */
1140 add_thread (currthread);
1144 if (!in_thread_list (currthread))
1146 if (ptid_equal (pid_to_ptid (ptid_get_pid (currthread)), inferior_ptid))
1148 /* inferior_ptid has no thread member yet. This can happen
1149 with the vAttach -> remote_wait,"TAAthread:" path if the
1150 stub doesn't support qC. This is the first stop reported
1151 after an attach, so this is the main thread. Update the
1152 ptid in the thread list. */
1153 thread_change_ptid (inferior_ptid, currthread);
1157 if (ptid_equal (magic_null_ptid, inferior_ptid))
1159 /* inferior_ptid is not set yet. This can happen with the
1160 vRun -> remote_wait,"TAAthread:" path if the stub
1161 doesn't support qC. This is the first stop reported
1162 after an attach, so this is the main thread. Update the
1163 ptid in the thread list. */
1164 thread_change_ptid (inferior_ptid, currthread);
1168 /* When connecting to a target remote, or to a target
1169 extended-remote which already was debugging an inferior, we
1170 may not know about it yet. Add it before adding its child
1171 thread, so notifications are emitted in a sensible order. */
1172 if (!in_inferior_list (ptid_get_pid (currthread)))
1173 add_inferior (ptid_get_pid (currthread));
1175 /* This is really a new thread. Add it. */
1176 add_thread (currthread);
1180 /* Call this function as a result of
1181 1) A halt indication (T packet) containing a thread id
1182 2) A direct query of currthread
1183 3) Successful execution of set thread
1187 record_currthread (ptid_t currthread)
1189 general_thread = currthread;
1191 if (ptid_equal (currthread, minus_one_ptid))
1192 /* We're just invalidating the local thread mirror. */
1195 notice_new_inferiors (currthread);
1198 static char *last_pass_packet;
1200 /* If 'QPassSignals' is supported, tell the remote stub what signals
1201 it can simply pass through to the inferior without reporting. */
1204 remote_pass_signals (void)
1206 if (remote_protocol_packets[PACKET_QPassSignals].support != PACKET_DISABLE)
1208 char *pass_packet, *p;
1209 int numsigs = (int) TARGET_SIGNAL_LAST;
1212 gdb_assert (numsigs < 256);
1213 for (i = 0; i < numsigs; i++)
1215 if (signal_stop_state (i) == 0
1216 && signal_print_state (i) == 0
1217 && signal_pass_state (i) == 1)
1220 pass_packet = xmalloc (count * 3 + strlen ("QPassSignals:") + 1);
1221 strcpy (pass_packet, "QPassSignals:");
1222 p = pass_packet + strlen (pass_packet);
1223 for (i = 0; i < numsigs; i++)
1225 if (signal_stop_state (i) == 0
1226 && signal_print_state (i) == 0
1227 && signal_pass_state (i) == 1)
1230 *p++ = tohex (i >> 4);
1231 *p++ = tohex (i & 15);
1240 if (!last_pass_packet || strcmp (last_pass_packet, pass_packet))
1242 struct remote_state *rs = get_remote_state ();
1243 char *buf = rs->buf;
1245 putpkt (pass_packet);
1246 getpkt (&rs->buf, &rs->buf_size, 0);
1247 packet_ok (buf, &remote_protocol_packets[PACKET_QPassSignals]);
1248 if (last_pass_packet)
1249 xfree (last_pass_packet);
1250 last_pass_packet = pass_packet;
1253 xfree (pass_packet);
1257 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
1258 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
1259 thread. If GEN is set, set the general thread, if not, then set
1260 the step/continue thread. */
1262 set_thread (struct ptid ptid, int gen)
1264 struct remote_state *rs = get_remote_state ();
1265 ptid_t state = gen ? general_thread : continue_thread;
1266 char *buf = rs->buf;
1267 char *endbuf = rs->buf + get_remote_packet_size ();
1269 if (ptid_equal (state, ptid))
1273 *buf++ = gen ? 'g' : 'c';
1274 if (ptid_equal (ptid, magic_null_ptid))
1275 xsnprintf (buf, endbuf - buf, "0");
1276 else if (ptid_equal (ptid, any_thread_ptid))
1277 xsnprintf (buf, endbuf - buf, "0");
1278 else if (ptid_equal (ptid, minus_one_ptid))
1279 xsnprintf (buf, endbuf - buf, "-1");
1281 write_ptid (buf, endbuf, ptid);
1283 getpkt (&rs->buf, &rs->buf_size, 0);
1285 general_thread = ptid;
1287 continue_thread = ptid;
1291 set_general_thread (struct ptid ptid)
1293 set_thread (ptid, 1);
1297 set_continue_thread (struct ptid ptid)
1299 set_thread (ptid, 0);
1302 /* Change the remote current process. Which thread within the process
1303 ends up selected isn't important, as long as it is the same process
1304 as what INFERIOR_PTID points to.
1306 This comes from that fact that there is no explicit notion of
1307 "selected process" in the protocol. The selected process for
1308 general operations is the process the selected general thread
1312 set_general_process (void)
1314 struct remote_state *rs = get_remote_state ();
1316 /* If the remote can't handle multiple processes, don't bother. */
1317 if (!remote_multi_process_p (rs))
1320 /* We only need to change the remote current thread if it's pointing
1321 at some other process. */
1322 if (ptid_get_pid (general_thread) != ptid_get_pid (inferior_ptid))
1323 set_general_thread (inferior_ptid);
1327 /* Return nonzero if the thread PTID is still alive on the remote
1331 remote_thread_alive (ptid_t ptid)
1333 struct remote_state *rs = get_remote_state ();
1334 int tid = ptid_get_tid (ptid);
1337 if (ptid_equal (ptid, magic_null_ptid))
1338 /* The main thread is always alive. */
1341 if (ptid_get_pid (ptid) != 0 && ptid_get_tid (ptid) == 0)
1342 /* The main thread is always alive. This can happen after a
1343 vAttach, if the remote side doesn't support
1348 endp = rs->buf + get_remote_packet_size ();
1351 write_ptid (p, endp, ptid);
1354 getpkt (&rs->buf, &rs->buf_size, 0);
1355 return (rs->buf[0] == 'O' && rs->buf[1] == 'K');
1358 /* About these extended threadlist and threadinfo packets. They are
1359 variable length packets but, the fields within them are often fixed
1360 length. They are redundent enough to send over UDP as is the
1361 remote protocol in general. There is a matching unit test module
1364 #define OPAQUETHREADBYTES 8
1366 /* a 64 bit opaque identifier */
1367 typedef unsigned char threadref[OPAQUETHREADBYTES];
1369 /* WARNING: This threadref data structure comes from the remote O.S.,
1370 libstub protocol encoding, and remote.c. it is not particularly
1373 /* Right now, the internal structure is int. We want it to be bigger.
1377 typedef int gdb_threadref; /* Internal GDB thread reference. */
1379 /* gdb_ext_thread_info is an internal GDB data structure which is
1380 equivalent to the reply of the remote threadinfo packet. */
1382 struct gdb_ext_thread_info
1384 threadref threadid; /* External form of thread reference. */
1385 int active; /* Has state interesting to GDB?
1387 char display[256]; /* Brief state display, name,
1388 blocked/suspended. */
1389 char shortname[32]; /* To be used to name threads. */
1390 char more_display[256]; /* Long info, statistics, queue depth,
1394 /* The volume of remote transfers can be limited by submitting
1395 a mask containing bits specifying the desired information.
1396 Use a union of these values as the 'selection' parameter to
1397 get_thread_info. FIXME: Make these TAG names more thread specific.
1400 #define TAG_THREADID 1
1401 #define TAG_EXISTS 2
1402 #define TAG_DISPLAY 4
1403 #define TAG_THREADNAME 8
1404 #define TAG_MOREDISPLAY 16
1406 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1408 char *unpack_varlen_hex (char *buff, ULONGEST *result);
1410 static char *unpack_nibble (char *buf, int *val);
1412 static char *pack_nibble (char *buf, int nibble);
1414 static char *pack_hex_byte (char *pkt, int /* unsigned char */ byte);
1416 static char *unpack_byte (char *buf, int *value);
1418 static char *pack_int (char *buf, int value);
1420 static char *unpack_int (char *buf, int *value);
1422 static char *unpack_string (char *src, char *dest, int length);
1424 static char *pack_threadid (char *pkt, threadref *id);
1426 static char *unpack_threadid (char *inbuf, threadref *id);
1428 void int_to_threadref (threadref *id, int value);
1430 static int threadref_to_int (threadref *ref);
1432 static void copy_threadref (threadref *dest, threadref *src);
1434 static int threadmatch (threadref *dest, threadref *src);
1436 static char *pack_threadinfo_request (char *pkt, int mode,
1439 static int remote_unpack_thread_info_response (char *pkt,
1440 threadref *expectedref,
1441 struct gdb_ext_thread_info
1445 static int remote_get_threadinfo (threadref *threadid,
1446 int fieldset, /*TAG mask */
1447 struct gdb_ext_thread_info *info);
1449 static char *pack_threadlist_request (char *pkt, int startflag,
1451 threadref *nextthread);
1453 static int parse_threadlist_response (char *pkt,
1455 threadref *original_echo,
1456 threadref *resultlist,
1459 static int remote_get_threadlist (int startflag,
1460 threadref *nextthread,
1464 threadref *threadlist);
1466 typedef int (*rmt_thread_action) (threadref *ref, void *context);
1468 static int remote_threadlist_iterator (rmt_thread_action stepfunction,
1469 void *context, int looplimit);
1471 static int remote_newthread_step (threadref *ref, void *context);
1474 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
1475 buffer we're allowed to write to. Returns
1476 BUF+CHARACTERS_WRITTEN. */
1479 write_ptid (char *buf, const char *endbuf, ptid_t ptid)
1482 struct remote_state *rs = get_remote_state ();
1484 if (remote_multi_process_p (rs))
1486 pid = ptid_get_pid (ptid);
1488 buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid);
1490 buf += xsnprintf (buf, endbuf - buf, "p%x.", pid);
1492 tid = ptid_get_tid (ptid);
1494 buf += xsnprintf (buf, endbuf - buf, "-%x", -tid);
1496 buf += xsnprintf (buf, endbuf - buf, "%x", tid);
1501 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
1502 passed the last parsed char. Returns null_ptid on error. */
1505 read_ptid (char *buf, char **obuf)
1509 ULONGEST pid = 0, tid = 0;
1514 /* Multi-process ptid. */
1515 pp = unpack_varlen_hex (p + 1, &pid);
1517 error (_("invalid remote ptid: %s\n"), p);
1520 pp = unpack_varlen_hex (p + 1, &tid);
1523 return ptid_build (pid, 0, tid);
1526 /* No multi-process. Just a tid. */
1527 pp = unpack_varlen_hex (p, &tid);
1529 /* Since the stub is not sending a process id, then default to
1530 what's in inferior_ptid. */
1531 pid = ptid_get_pid (inferior_ptid);
1535 return ptid_build (pid, 0, tid);
1538 /* Encode 64 bits in 16 chars of hex. */
1540 static const char hexchars[] = "0123456789abcdef";
1543 ishex (int ch, int *val)
1545 if ((ch >= 'a') && (ch <= 'f'))
1547 *val = ch - 'a' + 10;
1550 if ((ch >= 'A') && (ch <= 'F'))
1552 *val = ch - 'A' + 10;
1555 if ((ch >= '0') && (ch <= '9'))
1566 if (ch >= 'a' && ch <= 'f')
1567 return ch - 'a' + 10;
1568 if (ch >= '0' && ch <= '9')
1570 if (ch >= 'A' && ch <= 'F')
1571 return ch - 'A' + 10;
1576 stub_unpack_int (char *buff, int fieldlength)
1583 nibble = stubhex (*buff++);
1587 retval = retval << 4;
1593 unpack_varlen_hex (char *buff, /* packet to parse */
1597 ULONGEST retval = 0;
1599 while (ishex (*buff, &nibble))
1602 retval = retval << 4;
1603 retval |= nibble & 0x0f;
1610 unpack_nibble (char *buf, int *val)
1612 *val = fromhex (*buf++);
1617 pack_nibble (char *buf, int nibble)
1619 *buf++ = hexchars[(nibble & 0x0f)];
1624 pack_hex_byte (char *pkt, int byte)
1626 *pkt++ = hexchars[(byte >> 4) & 0xf];
1627 *pkt++ = hexchars[(byte & 0xf)];
1632 unpack_byte (char *buf, int *value)
1634 *value = stub_unpack_int (buf, 2);
1639 pack_int (char *buf, int value)
1641 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
1642 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
1643 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
1644 buf = pack_hex_byte (buf, (value & 0xff));
1649 unpack_int (char *buf, int *value)
1651 *value = stub_unpack_int (buf, 8);
1655 #if 0 /* Currently unused, uncomment when needed. */
1656 static char *pack_string (char *pkt, char *string);
1659 pack_string (char *pkt, char *string)
1664 len = strlen (string);
1666 len = 200; /* Bigger than most GDB packets, junk??? */
1667 pkt = pack_hex_byte (pkt, len);
1671 if ((ch == '\0') || (ch == '#'))
1672 ch = '*'; /* Protect encapsulation. */
1677 #endif /* 0 (unused) */
1680 unpack_string (char *src, char *dest, int length)
1689 pack_threadid (char *pkt, threadref *id)
1692 unsigned char *altid;
1694 altid = (unsigned char *) id;
1695 limit = pkt + BUF_THREAD_ID_SIZE;
1697 pkt = pack_hex_byte (pkt, *altid++);
1703 unpack_threadid (char *inbuf, threadref *id)
1706 char *limit = inbuf + BUF_THREAD_ID_SIZE;
1709 altref = (char *) id;
1711 while (inbuf < limit)
1713 x = stubhex (*inbuf++);
1714 y = stubhex (*inbuf++);
1715 *altref++ = (x << 4) | y;
1720 /* Externally, threadrefs are 64 bits but internally, they are still
1721 ints. This is due to a mismatch of specifications. We would like
1722 to use 64bit thread references internally. This is an adapter
1726 int_to_threadref (threadref *id, int value)
1728 unsigned char *scan;
1730 scan = (unsigned char *) id;
1736 *scan++ = (value >> 24) & 0xff;
1737 *scan++ = (value >> 16) & 0xff;
1738 *scan++ = (value >> 8) & 0xff;
1739 *scan++ = (value & 0xff);
1743 threadref_to_int (threadref *ref)
1746 unsigned char *scan;
1752 value = (value << 8) | ((*scan++) & 0xff);
1757 copy_threadref (threadref *dest, threadref *src)
1760 unsigned char *csrc, *cdest;
1762 csrc = (unsigned char *) src;
1763 cdest = (unsigned char *) dest;
1770 threadmatch (threadref *dest, threadref *src)
1772 /* Things are broken right now, so just assume we got a match. */
1774 unsigned char *srcp, *destp;
1776 srcp = (char *) src;
1777 destp = (char *) dest;
1781 result &= (*srcp++ == *destp++) ? 1 : 0;
1788 threadid:1, # always request threadid
1795 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1798 pack_threadinfo_request (char *pkt, int mode, threadref *id)
1800 *pkt++ = 'q'; /* Info Query */
1801 *pkt++ = 'P'; /* process or thread info */
1802 pkt = pack_int (pkt, mode); /* mode */
1803 pkt = pack_threadid (pkt, id); /* threadid */
1804 *pkt = '\0'; /* terminate */
1808 /* These values tag the fields in a thread info response packet. */
1809 /* Tagging the fields allows us to request specific fields and to
1810 add more fields as time goes by. */
1812 #define TAG_THREADID 1 /* Echo the thread identifier. */
1813 #define TAG_EXISTS 2 /* Is this process defined enough to
1814 fetch registers and its stack? */
1815 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1816 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
1817 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1821 remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
1822 struct gdb_ext_thread_info *info)
1824 struct remote_state *rs = get_remote_state ();
1828 char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */
1831 /* info->threadid = 0; FIXME: implement zero_threadref. */
1833 info->display[0] = '\0';
1834 info->shortname[0] = '\0';
1835 info->more_display[0] = '\0';
1837 /* Assume the characters indicating the packet type have been
1839 pkt = unpack_int (pkt, &mask); /* arg mask */
1840 pkt = unpack_threadid (pkt, &ref);
1843 warning (_("Incomplete response to threadinfo request."));
1844 if (!threadmatch (&ref, expectedref))
1845 { /* This is an answer to a different request. */
1846 warning (_("ERROR RMT Thread info mismatch."));
1849 copy_threadref (&info->threadid, &ref);
1851 /* Loop on tagged fields , try to bail if somthing goes wrong. */
1853 /* Packets are terminated with nulls. */
1854 while ((pkt < limit) && mask && *pkt)
1856 pkt = unpack_int (pkt, &tag); /* tag */
1857 pkt = unpack_byte (pkt, &length); /* length */
1858 if (!(tag & mask)) /* Tags out of synch with mask. */
1860 warning (_("ERROR RMT: threadinfo tag mismatch."));
1864 if (tag == TAG_THREADID)
1868 warning (_("ERROR RMT: length of threadid is not 16."));
1872 pkt = unpack_threadid (pkt, &ref);
1873 mask = mask & ~TAG_THREADID;
1876 if (tag == TAG_EXISTS)
1878 info->active = stub_unpack_int (pkt, length);
1880 mask = mask & ~(TAG_EXISTS);
1883 warning (_("ERROR RMT: 'exists' length too long."));
1889 if (tag == TAG_THREADNAME)
1891 pkt = unpack_string (pkt, &info->shortname[0], length);
1892 mask = mask & ~TAG_THREADNAME;
1895 if (tag == TAG_DISPLAY)
1897 pkt = unpack_string (pkt, &info->display[0], length);
1898 mask = mask & ~TAG_DISPLAY;
1901 if (tag == TAG_MOREDISPLAY)
1903 pkt = unpack_string (pkt, &info->more_display[0], length);
1904 mask = mask & ~TAG_MOREDISPLAY;
1907 warning (_("ERROR RMT: unknown thread info tag."));
1908 break; /* Not a tag we know about. */
1914 remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
1915 struct gdb_ext_thread_info *info)
1917 struct remote_state *rs = get_remote_state ();
1920 pack_threadinfo_request (rs->buf, fieldset, threadid);
1922 getpkt (&rs->buf, &rs->buf_size, 0);
1924 if (rs->buf[0] == '\0')
1927 result = remote_unpack_thread_info_response (rs->buf + 2,
1932 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1935 pack_threadlist_request (char *pkt, int startflag, int threadcount,
1936 threadref *nextthread)
1938 *pkt++ = 'q'; /* info query packet */
1939 *pkt++ = 'L'; /* Process LIST or threadLIST request */
1940 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
1941 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
1942 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
1947 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1950 parse_threadlist_response (char *pkt, int result_limit,
1951 threadref *original_echo, threadref *resultlist,
1954 struct remote_state *rs = get_remote_state ();
1956 int count, resultcount, done;
1959 /* Assume the 'q' and 'M chars have been stripped. */
1960 limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE);
1961 /* done parse past here */
1962 pkt = unpack_byte (pkt, &count); /* count field */
1963 pkt = unpack_nibble (pkt, &done);
1964 /* The first threadid is the argument threadid. */
1965 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
1966 while ((count-- > 0) && (pkt < limit))
1968 pkt = unpack_threadid (pkt, resultlist++);
1969 if (resultcount++ >= result_limit)
1978 remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
1979 int *done, int *result_count, threadref *threadlist)
1981 struct remote_state *rs = get_remote_state ();
1982 static threadref echo_nextthread;
1985 /* Trancate result limit to be smaller than the packet size. */
1986 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= get_remote_packet_size ())
1987 result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2;
1989 pack_threadlist_request (rs->buf, startflag, result_limit, nextthread);
1991 getpkt (&rs->buf, &rs->buf_size, 0);
1993 if (*rs->buf == '\0')
1997 parse_threadlist_response (rs->buf + 2, result_limit, &echo_nextthread,
2000 if (!threadmatch (&echo_nextthread, nextthread))
2002 /* FIXME: This is a good reason to drop the packet. */
2003 /* Possably, there is a duplicate response. */
2005 retransmit immediatly - race conditions
2006 retransmit after timeout - yes
2008 wait for packet, then exit
2010 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2011 return 0; /* I choose simply exiting. */
2013 if (*result_count <= 0)
2017 warning (_("RMT ERROR : failed to get remote thread list."));
2020 return result; /* break; */
2022 if (*result_count > result_limit)
2025 warning (_("RMT ERROR: threadlist response longer than requested."));
2031 /* This is the interface between remote and threads, remotes upper
2034 /* remote_find_new_threads retrieves the thread list and for each
2035 thread in the list, looks up the thread in GDB's internal list,
2036 adding the thread if it does not already exist. This involves
2037 getting partial thread lists from the remote target so, polling the
2038 quit_flag is required. */
2041 /* About this many threadisds fit in a packet. */
2043 #define MAXTHREADLISTRESULTS 32
2046 remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
2049 int done, i, result_count;
2053 static threadref nextthread;
2054 static threadref resultthreadlist[MAXTHREADLISTRESULTS];
2059 if (loopcount++ > looplimit)
2062 warning (_("Remote fetch threadlist -infinite loop-."));
2065 if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS,
2066 &done, &result_count, resultthreadlist))
2071 /* Clear for later iterations. */
2073 /* Setup to resume next batch of thread references, set nextthread. */
2074 if (result_count >= 1)
2075 copy_threadref (&nextthread, &resultthreadlist[result_count - 1]);
2077 while (result_count--)
2078 if (!(result = (*stepfunction) (&resultthreadlist[i++], context)))
2085 remote_newthread_step (threadref *ref, void *context)
2087 int pid = ptid_get_pid (inferior_ptid);
2088 ptid_t ptid = ptid_build (pid, 0, threadref_to_int (ref));
2090 if (!in_thread_list (ptid))
2092 return 1; /* continue iterator */
2095 #define CRAZY_MAX_THREADS 1000
2098 remote_current_thread (ptid_t oldpid)
2100 struct remote_state *rs = get_remote_state ();
2106 getpkt (&rs->buf, &rs->buf_size, 0);
2107 if (rs->buf[0] == 'Q' && rs->buf[1] == 'C')
2108 return read_ptid (&rs->buf[2], NULL);
2113 /* Find new threads for info threads command.
2114 * Original version, using John Metzler's thread protocol.
2118 remote_find_new_threads (void)
2120 remote_threadlist_iterator (remote_newthread_step, 0,
2125 * Find all threads for info threads command.
2126 * Uses new thread protocol contributed by Cisco.
2127 * Falls back and attempts to use the older method (above)
2128 * if the target doesn't respond to the new method.
2132 remote_threads_info (void)
2134 struct remote_state *rs = get_remote_state ();
2138 if (remote_desc == 0) /* paranoia */
2139 error (_("Command can only be used when connected to the remote target."));
2141 if (use_threadinfo_query)
2143 putpkt ("qfThreadInfo");
2144 getpkt (&rs->buf, &rs->buf_size, 0);
2146 if (bufp[0] != '\0') /* q packet recognized */
2148 while (*bufp++ == 'm') /* reply contains one or more TID */
2152 new_thread = read_ptid (bufp, &bufp);
2153 if (!ptid_equal (new_thread, null_ptid)
2154 && (!in_thread_list (new_thread)
2155 || is_exited (new_thread)))
2157 /* When connected to a multi-process aware stub,
2158 "info threads" may show up threads of
2159 inferiors we didn't know about yet. Add them
2160 now, and before adding any of its child
2161 threads, so notifications are emitted in a
2163 if (!in_inferior_list (ptid_get_pid (new_thread)))
2164 add_inferior (ptid_get_pid (new_thread));
2166 add_thread (new_thread);
2168 /* In non-stop mode, we assume new found threads
2169 are running until we proven otherwise with a
2170 stop reply. In all-stop, we can only get
2171 here if all threads are stopped. */
2172 set_executing (new_thread, non_stop ? 1 : 0);
2173 set_running (new_thread, non_stop ? 1 : 0);
2176 while (*bufp++ == ','); /* comma-separated list */
2177 putpkt ("qsThreadInfo");
2178 getpkt (&rs->buf, &rs->buf_size, 0);
2185 /* Only qfThreadInfo is supported in non-stop mode. */
2189 /* Else fall back to old method based on jmetzler protocol. */
2190 use_threadinfo_query = 0;
2191 remote_find_new_threads ();
2196 * Collect a descriptive string about the given thread.
2197 * The target may say anything it wants to about the thread
2198 * (typically info about its blocked / runnable state, name, etc.).
2199 * This string will appear in the info threads display.
2201 * Optional: targets are not required to implement this function.
2205 remote_threads_extra_info (struct thread_info *tp)
2207 struct remote_state *rs = get_remote_state ();
2211 struct gdb_ext_thread_info threadinfo;
2212 static char display_buf[100]; /* arbitrary... */
2213 int n = 0; /* position in display_buf */
2215 if (remote_desc == 0) /* paranoia */
2216 internal_error (__FILE__, __LINE__,
2217 _("remote_threads_extra_info"));
2219 if (ptid_equal (tp->ptid, magic_null_ptid)
2220 || (ptid_get_pid (tp->ptid) != 0 && ptid_get_tid (tp->ptid) == 0))
2221 /* This is the main thread which was added by GDB. The remote
2222 server doesn't know about it. */
2225 if (use_threadextra_query)
2228 char *endb = rs->buf + get_remote_packet_size ();
2230 xsnprintf (b, endb - b, "qThreadExtraInfo,");
2232 write_ptid (b, endb, tp->ptid);
2235 getpkt (&rs->buf, &rs->buf_size, 0);
2236 if (rs->buf[0] != 0)
2238 n = min (strlen (rs->buf) / 2, sizeof (display_buf));
2239 result = hex2bin (rs->buf, (gdb_byte *) display_buf, n);
2240 display_buf [result] = '\0';
2245 /* If the above query fails, fall back to the old method. */
2246 use_threadextra_query = 0;
2247 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
2248 | TAG_MOREDISPLAY | TAG_DISPLAY;
2249 int_to_threadref (&id, ptid_get_tid (tp->ptid));
2250 if (remote_get_threadinfo (&id, set, &threadinfo))
2251 if (threadinfo.active)
2253 if (*threadinfo.shortname)
2254 n += xsnprintf (&display_buf[0], sizeof (display_buf) - n,
2255 " Name: %s,", threadinfo.shortname);
2256 if (*threadinfo.display)
2257 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
2258 " State: %s,", threadinfo.display);
2259 if (*threadinfo.more_display)
2260 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
2261 " Priority: %s", threadinfo.more_display);
2265 /* For purely cosmetic reasons, clear up trailing commas. */
2266 if (',' == display_buf[n-1])
2267 display_buf[n-1] = ' ';
2275 /* Restart the remote side; this is an extended protocol operation. */
2278 extended_remote_restart (void)
2280 struct remote_state *rs = get_remote_state ();
2282 /* Send the restart command; for reasons I don't understand the
2283 remote side really expects a number after the "R". */
2284 xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0);
2287 remote_fileio_reset ();
2290 /* Clean up connection to a remote debugger. */
2293 remote_close (int quitting)
2295 if (remote_desc == NULL)
2296 return; /* already closed */
2298 /* Make sure we leave stdin registered in the event loop, and we
2299 don't leave the async SIGINT signal handler installed. */
2300 remote_terminal_ours ();
2302 serial_close (remote_desc);
2305 /* We don't have a connection to the remote stub anymore. Get rid
2306 of all the inferiors and their threads we were controlling. */
2307 discard_all_inferiors ();
2309 /* We're no longer interested in any of these events. */
2310 discard_pending_stop_replies (-1);
2312 if (remote_async_inferior_event_token)
2313 delete_async_event_handler (&remote_async_inferior_event_token);
2314 if (remote_async_get_pending_events_token)
2315 delete_async_event_handler (&remote_async_get_pending_events_token);
2317 generic_mourn_inferior ();
2320 /* Query the remote side for the text, data and bss offsets. */
2325 struct remote_state *rs = get_remote_state ();
2328 int lose, num_segments = 0, do_sections, do_segments;
2329 CORE_ADDR text_addr, data_addr, bss_addr, segments[2];
2330 struct section_offsets *offs;
2331 struct symfile_segment_data *data;
2333 if (symfile_objfile == NULL)
2336 putpkt ("qOffsets");
2337 getpkt (&rs->buf, &rs->buf_size, 0);
2340 if (buf[0] == '\000')
2341 return; /* Return silently. Stub doesn't support
2345 warning (_("Remote failure reply: %s"), buf);
2349 /* Pick up each field in turn. This used to be done with scanf, but
2350 scanf will make trouble if CORE_ADDR size doesn't match
2351 conversion directives correctly. The following code will work
2352 with any size of CORE_ADDR. */
2353 text_addr = data_addr = bss_addr = 0;
2357 if (strncmp (ptr, "Text=", 5) == 0)
2360 /* Don't use strtol, could lose on big values. */
2361 while (*ptr && *ptr != ';')
2362 text_addr = (text_addr << 4) + fromhex (*ptr++);
2364 if (strncmp (ptr, ";Data=", 6) == 0)
2367 while (*ptr && *ptr != ';')
2368 data_addr = (data_addr << 4) + fromhex (*ptr++);
2373 if (!lose && strncmp (ptr, ";Bss=", 5) == 0)
2376 while (*ptr && *ptr != ';')
2377 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
2379 if (bss_addr != data_addr)
2380 warning (_("Target reported unsupported offsets: %s"), buf);
2385 else if (strncmp (ptr, "TextSeg=", 8) == 0)
2388 /* Don't use strtol, could lose on big values. */
2389 while (*ptr && *ptr != ';')
2390 text_addr = (text_addr << 4) + fromhex (*ptr++);
2393 if (strncmp (ptr, ";DataSeg=", 9) == 0)
2396 while (*ptr && *ptr != ';')
2397 data_addr = (data_addr << 4) + fromhex (*ptr++);
2405 error (_("Malformed response to offset query, %s"), buf);
2406 else if (*ptr != '\0')
2407 warning (_("Target reported unsupported offsets: %s"), buf);
2409 offs = ((struct section_offsets *)
2410 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
2411 memcpy (offs, symfile_objfile->section_offsets,
2412 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
2414 data = get_symfile_segment_data (symfile_objfile->obfd);
2415 do_segments = (data != NULL);
2416 do_sections = num_segments == 0;
2418 if (num_segments > 0)
2420 segments[0] = text_addr;
2421 segments[1] = data_addr;
2423 /* If we have two segments, we can still try to relocate everything
2424 by assuming that the .text and .data offsets apply to the whole
2425 text and data segments. Convert the offsets given in the packet
2426 to base addresses for symfile_map_offsets_to_segments. */
2427 else if (data && data->num_segments == 2)
2429 segments[0] = data->segment_bases[0] + text_addr;
2430 segments[1] = data->segment_bases[1] + data_addr;
2433 /* If the object file has only one segment, assume that it is text
2434 rather than data; main programs with no writable data are rare,
2435 but programs with no code are useless. Of course the code might
2436 have ended up in the data segment... to detect that we would need
2437 the permissions here. */
2438 else if (data && data->num_segments == 1)
2440 segments[0] = data->segment_bases[0] + text_addr;
2443 /* There's no way to relocate by segment. */
2449 int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data,
2450 offs, num_segments, segments);
2452 if (ret == 0 && !do_sections)
2453 error (_("Can not handle qOffsets TextSeg response with this symbol file"));
2460 free_symfile_segment_data (data);
2464 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
2466 /* This is a temporary kludge to force data and bss to use the same offsets
2467 because that's what nlmconv does now. The real solution requires changes
2468 to the stub and remote.c that I don't have time to do right now. */
2470 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
2471 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
2474 objfile_relocate (symfile_objfile, offs);
2477 /* Callback for iterate_over_threads. Set the STOP_REQUESTED flags in
2478 threads we know are stopped already. This is used during the
2479 initial remote connection in non-stop mode --- threads that are
2480 reported as already being stopped are left stopped. */
2483 set_stop_requested_callback (struct thread_info *thread, void *data)
2485 /* If we have a stop reply for this thread, it must be stopped. */
2486 if (peek_stop_reply (thread->ptid))
2487 set_stop_requested (thread->ptid, 1);
2492 /* Stub for catch_exception. */
2494 struct start_remote_args
2498 /* The current target. */
2499 struct target_ops *target;
2501 /* Non-zero if this is an extended-remote target. */
2506 remote_start_remote (struct ui_out *uiout, void *opaque)
2508 struct start_remote_args *args = opaque;
2509 struct remote_state *rs = get_remote_state ();
2510 struct packet_config *noack_config;
2511 char *wait_status = NULL;
2513 immediate_quit++; /* Allow user to interrupt it. */
2515 /* Ack any packet which the remote side has already sent. */
2516 serial_write (remote_desc, "+", 1);
2518 /* The first packet we send to the target is the optional "supported
2519 packets" request. If the target can answer this, it will tell us
2520 which later probes to skip. */
2521 remote_query_supported ();
2523 /* Next, we possibly activate noack mode.
2525 If the QStartNoAckMode packet configuration is set to AUTO,
2526 enable noack mode if the stub reported a wish for it with
2529 If set to TRUE, then enable noack mode even if the stub didn't
2530 report it in qSupported. If the stub doesn't reply OK, the
2531 session ends with an error.
2533 If FALSE, then don't activate noack mode, regardless of what the
2534 stub claimed should be the default with qSupported. */
2536 noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode];
2538 if (noack_config->detect == AUTO_BOOLEAN_TRUE
2539 || (noack_config->detect == AUTO_BOOLEAN_AUTO
2540 && noack_config->support == PACKET_ENABLE))
2542 putpkt ("QStartNoAckMode");
2543 getpkt (&rs->buf, &rs->buf_size, 0);
2544 if (packet_ok (rs->buf, noack_config) == PACKET_OK)
2548 if (args->extended_p)
2550 /* Tell the remote that we are using the extended protocol. */
2552 getpkt (&rs->buf, &rs->buf_size, 0);
2555 /* Next, if the target can specify a description, read it. We do
2556 this before anything involving memory or registers. */
2557 target_find_description ();
2559 /* On OSs where the list of libraries is global to all
2560 processes, we fetch them early. */
2561 if (gdbarch_has_global_solist (target_gdbarch))
2562 solib_add (NULL, args->from_tty, args->target, auto_solib_add);
2566 if (!rs->non_stop_aware)
2567 error (_("Non-stop mode requested, but remote does not support non-stop"));
2569 putpkt ("QNonStop:1");
2570 getpkt (&rs->buf, &rs->buf_size, 0);
2572 if (strcmp (rs->buf, "OK") != 0)
2573 error ("Remote refused setting non-stop mode with: %s", rs->buf);
2575 /* Find about threads and processes the stub is already
2576 controlling. We default to adding them in the running state.
2577 The '?' query below will then tell us about which threads are
2580 /* If we're not using the multi-process extensions, there's no
2581 way to know the pid of the reported threads; use the magic
2583 if (!remote_multi_process_p (rs))
2584 inferior_ptid = magic_null_ptid;
2586 remote_threads_info ();
2588 else if (rs->non_stop_aware)
2590 /* Don't assume that the stub can operate in all-stop mode.
2591 Request it explicitely. */
2592 putpkt ("QNonStop:0");
2593 getpkt (&rs->buf, &rs->buf_size, 0);
2595 if (strcmp (rs->buf, "OK") != 0)
2596 error ("Remote refused setting all-stop mode with: %s", rs->buf);
2599 /* Check whether the target is running now. */
2601 getpkt (&rs->buf, &rs->buf_size, 0);
2605 if (rs->buf[0] == 'W' || rs->buf[0] == 'X')
2607 if (args->extended_p)
2609 /* We're connected, but not running. Drop out before we
2610 call start_remote. */
2611 target_mark_exited (args->target);
2615 error (_("The target is not running (try extended-remote?)"));
2619 if (args->extended_p)
2620 target_mark_running (args->target);
2622 /* Save the reply for later. */
2623 wait_status = alloca (strlen (rs->buf) + 1);
2624 strcpy (wait_status, rs->buf);
2627 /* Let the stub know that we want it to return the thread. */
2628 set_continue_thread (minus_one_ptid);
2630 /* Without this, some commands which require an active target
2631 (such as kill) won't work. This variable serves (at least)
2632 double duty as both the pid of the target process (if it has
2633 such), and as a flag indicating that a target is active.
2634 These functions should be split out into seperate variables,
2635 especially since GDB will someday have a notion of debugging
2636 several processes. */
2637 inferior_ptid = magic_null_ptid;
2639 /* Now, if we have thread information, update inferior_ptid. */
2640 inferior_ptid = remote_current_thread (inferior_ptid);
2642 add_inferior (ptid_get_pid (inferior_ptid));
2644 /* Always add the main thread. */
2645 add_thread_silent (inferior_ptid);
2647 get_offsets (); /* Get text, data & bss offsets. */
2649 /* If we could not find a description using qXfer, and we know
2650 how to do it some other way, try again. This is not
2651 supported for non-stop; it could be, but it is tricky if
2652 there are no stopped threads when we connect. */
2653 if (remote_read_description_p (args->target)
2654 && gdbarch_target_desc (target_gdbarch) == NULL)
2656 target_clear_description ();
2657 target_find_description ();
2660 /* Use the previously fetched status. */
2661 gdb_assert (wait_status != NULL);
2662 strcpy (rs->buf, wait_status);
2663 rs->cached_wait_status = 1;
2666 start_remote (args->from_tty); /* Initialize gdb process mechanisms. */
2670 /* In non-stop, we will either get an "OK", meaning that there
2671 are no stopped threads at this time; or, a regular stop
2672 reply. In the latter case, there may be more than one thread
2673 stopped --- we pull them all out using the vStopped
2675 if (strcmp (rs->buf, "OK") != 0)
2677 struct stop_reply *stop_reply;
2678 struct cleanup *old_chain;
2680 stop_reply = stop_reply_xmalloc ();
2681 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
2683 remote_parse_stop_reply (rs->buf, stop_reply);
2684 discard_cleanups (old_chain);
2686 /* get_pending_stop_replies acks this one, and gets the rest
2688 pending_stop_reply = stop_reply;
2689 remote_get_pending_stop_replies ();
2691 /* Make sure that threads that were stopped remain
2693 iterate_over_threads (set_stop_requested_callback, NULL);
2696 if (target_can_async_p ())
2697 target_async (inferior_event_handler, 0);
2699 if (thread_count () == 0)
2701 if (args->extended_p)
2703 /* We're connected, but not running. Drop out before we
2704 call start_remote. */
2705 target_mark_exited (args->target);
2709 error (_("The target is not running (try extended-remote?)"));
2712 if (args->extended_p)
2713 target_mark_running (args->target);
2715 /* Let the stub know that we want it to return the thread. */
2717 /* Force the stub to choose a thread. */
2718 set_general_thread (null_ptid);
2721 inferior_ptid = remote_current_thread (minus_one_ptid);
2722 if (ptid_equal (inferior_ptid, minus_one_ptid))
2723 error (_("remote didn't report the current thread in non-stop mode"));
2725 get_offsets (); /* Get text, data & bss offsets. */
2727 /* In non-stop mode, any cached wait status will be stored in
2728 the stop reply queue. */
2729 gdb_assert (wait_status == NULL);
2732 /* If we connected to a live target, do some additional setup. */
2733 if (target_has_execution)
2735 if (exec_bfd) /* No use without an exec file. */
2736 remote_check_symbols (symfile_objfile);
2739 /* If code is shared between processes, then breakpoints are global
2740 too; Insert them now. */
2741 if (gdbarch_has_global_solist (target_gdbarch)
2742 && breakpoints_always_inserted_mode ())
2743 insert_breakpoints ();
2746 /* Open a connection to a remote debugger.
2747 NAME is the filename used for communication. */
2750 remote_open (char *name, int from_tty)
2752 remote_open_1 (name, from_tty, &remote_ops, 0);
2755 /* Open a connection to a remote debugger using the extended
2756 remote gdb protocol. NAME is the filename used for communication. */
2759 extended_remote_open (char *name, int from_tty)
2761 remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */);
2764 /* Generic code for opening a connection to a remote target. */
2767 init_all_packet_configs (void)
2770 for (i = 0; i < PACKET_MAX; i++)
2771 update_packet_config (&remote_protocol_packets[i]);
2774 /* Symbol look-up. */
2777 remote_check_symbols (struct objfile *objfile)
2779 struct remote_state *rs = get_remote_state ();
2780 char *msg, *reply, *tmp;
2781 struct minimal_symbol *sym;
2784 if (remote_protocol_packets[PACKET_qSymbol].support == PACKET_DISABLE)
2787 /* Make sure the remote is pointing at the right process. */
2788 set_general_process ();
2790 /* Allocate a message buffer. We can't reuse the input buffer in RS,
2791 because we need both at the same time. */
2792 msg = alloca (get_remote_packet_size ());
2794 /* Invite target to request symbol lookups. */
2796 putpkt ("qSymbol::");
2797 getpkt (&rs->buf, &rs->buf_size, 0);
2798 packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSymbol]);
2801 while (strncmp (reply, "qSymbol:", 8) == 0)
2804 end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2);
2806 sym = lookup_minimal_symbol (msg, NULL, NULL);
2808 xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]);
2811 CORE_ADDR sym_addr = SYMBOL_VALUE_ADDRESS (sym);
2813 /* If this is a function address, return the start of code
2814 instead of any data function descriptor. */
2815 sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch,
2819 xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s",
2820 paddr_nz (sym_addr), &reply[8]);
2824 getpkt (&rs->buf, &rs->buf_size, 0);
2829 static struct serial *
2830 remote_serial_open (char *name)
2832 static int udp_warning = 0;
2834 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2835 of in ser-tcp.c, because it is the remote protocol assuming that the
2836 serial connection is reliable and not the serial connection promising
2838 if (!udp_warning && strncmp (name, "udp:", 4) == 0)
2841 The remote protocol may be unreliable over UDP.\n\
2842 Some events may be lost, rendering further debugging impossible."));
2846 return serial_open (name);
2849 /* This type describes each known response to the qSupported
2851 struct protocol_feature
2853 /* The name of this protocol feature. */
2856 /* The default for this protocol feature. */
2857 enum packet_support default_support;
2859 /* The function to call when this feature is reported, or after
2860 qSupported processing if the feature is not supported.
2861 The first argument points to this structure. The second
2862 argument indicates whether the packet requested support be
2863 enabled, disabled, or probed (or the default, if this function
2864 is being called at the end of processing and this feature was
2865 not reported). The third argument may be NULL; if not NULL, it
2866 is a NUL-terminated string taken from the packet following
2867 this feature's name and an equals sign. */
2868 void (*func) (const struct protocol_feature *, enum packet_support,
2871 /* The corresponding packet for this feature. Only used if
2872 FUNC is remote_supported_packet. */
2877 remote_supported_packet (const struct protocol_feature *feature,
2878 enum packet_support support,
2879 const char *argument)
2883 warning (_("Remote qSupported response supplied an unexpected value for"
2884 " \"%s\"."), feature->name);
2888 if (remote_protocol_packets[feature->packet].support
2889 == PACKET_SUPPORT_UNKNOWN)
2890 remote_protocol_packets[feature->packet].support = support;
2894 remote_packet_size (const struct protocol_feature *feature,
2895 enum packet_support support, const char *value)
2897 struct remote_state *rs = get_remote_state ();
2902 if (support != PACKET_ENABLE)
2905 if (value == NULL || *value == '\0')
2907 warning (_("Remote target reported \"%s\" without a size."),
2913 packet_size = strtol (value, &value_end, 16);
2914 if (errno != 0 || *value_end != '\0' || packet_size < 0)
2916 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
2917 feature->name, value);
2921 if (packet_size > MAX_REMOTE_PACKET_SIZE)
2923 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
2924 packet_size, MAX_REMOTE_PACKET_SIZE);
2925 packet_size = MAX_REMOTE_PACKET_SIZE;
2928 /* Record the new maximum packet size. */
2929 rs->explicit_packet_size = packet_size;
2933 remote_multi_process_feature (const struct protocol_feature *feature,
2934 enum packet_support support, const char *value)
2936 struct remote_state *rs = get_remote_state ();
2937 rs->multi_process_aware = (support == PACKET_ENABLE);
2941 remote_non_stop_feature (const struct protocol_feature *feature,
2942 enum packet_support support, const char *value)
2944 struct remote_state *rs = get_remote_state ();
2945 rs->non_stop_aware = (support == PACKET_ENABLE);
2948 static struct protocol_feature remote_protocol_features[] = {
2949 { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
2950 { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
2951 PACKET_qXfer_auxv },
2952 { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet,
2953 PACKET_qXfer_features },
2954 { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet,
2955 PACKET_qXfer_libraries },
2956 { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet,
2957 PACKET_qXfer_memory_map },
2958 { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet,
2959 PACKET_qXfer_spu_read },
2960 { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet,
2961 PACKET_qXfer_spu_write },
2962 { "qXfer:osdata:read", PACKET_DISABLE, remote_supported_packet,
2963 PACKET_qXfer_osdata },
2964 { "QPassSignals", PACKET_DISABLE, remote_supported_packet,
2965 PACKET_QPassSignals },
2966 { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet,
2967 PACKET_QStartNoAckMode },
2968 { "multiprocess", PACKET_DISABLE, remote_multi_process_feature, -1 },
2969 { "QNonStop", PACKET_DISABLE, remote_non_stop_feature, -1 },
2973 remote_query_supported (void)
2975 struct remote_state *rs = get_remote_state ();
2978 unsigned char seen [ARRAY_SIZE (remote_protocol_features)];
2980 /* The packet support flags are handled differently for this packet
2981 than for most others. We treat an error, a disabled packet, and
2982 an empty response identically: any features which must be reported
2983 to be used will be automatically disabled. An empty buffer
2984 accomplishes this, since that is also the representation for a list
2985 containing no features. */
2988 if (remote_protocol_packets[PACKET_qSupported].support != PACKET_DISABLE)
2991 putpkt ("qSupported:multiprocess+");
2993 putpkt ("qSupported");
2995 getpkt (&rs->buf, &rs->buf_size, 0);
2997 /* If an error occured, warn, but do not return - just reset the
2998 buffer to empty and go on to disable features. */
2999 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported])
3002 warning (_("Remote failure reply: %s"), rs->buf);
3007 memset (seen, 0, sizeof (seen));
3012 enum packet_support is_supported;
3013 char *p, *end, *name_end, *value;
3015 /* First separate out this item from the rest of the packet. If
3016 there's another item after this, we overwrite the separator
3017 (terminated strings are much easier to work with). */
3019 end = strchr (p, ';');
3022 end = p + strlen (p);
3032 warning (_("empty item in \"qSupported\" response"));
3037 name_end = strchr (p, '=');
3040 /* This is a name=value entry. */
3041 is_supported = PACKET_ENABLE;
3042 value = name_end + 1;
3051 is_supported = PACKET_ENABLE;
3055 is_supported = PACKET_DISABLE;
3059 is_supported = PACKET_SUPPORT_UNKNOWN;
3063 warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p);
3069 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
3070 if (strcmp (remote_protocol_features[i].name, p) == 0)
3072 const struct protocol_feature *feature;
3075 feature = &remote_protocol_features[i];
3076 feature->func (feature, is_supported, value);
3081 /* If we increased the packet size, make sure to increase the global
3082 buffer size also. We delay this until after parsing the entire
3083 qSupported packet, because this is the same buffer we were
3085 if (rs->buf_size < rs->explicit_packet_size)
3087 rs->buf_size = rs->explicit_packet_size;
3088 rs->buf = xrealloc (rs->buf, rs->buf_size);
3091 /* Handle the defaults for unmentioned features. */
3092 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
3095 const struct protocol_feature *feature;
3097 feature = &remote_protocol_features[i];
3098 feature->func (feature, feature->default_support, NULL);
3104 remote_open_1 (char *name, int from_tty, struct target_ops *target, int extended_p)
3106 struct remote_state *rs = get_remote_state ();
3109 error (_("To open a remote debug connection, you need to specify what\n"
3110 "serial device is attached to the remote system\n"
3111 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
3113 /* See FIXME above. */
3114 if (!target_async_permitted)
3115 wait_forever_enabled_p = 1;
3117 /* If we're connected to a running target, target_preopen will kill it.
3118 But if we're connected to a target system with no running process,
3119 then we will still be connected when it returns. Ask this question
3120 first, before target_preopen has a chance to kill anything. */
3121 if (remote_desc != NULL && !target_has_execution)
3124 || query (_("Already connected to a remote target. Disconnect? ")))
3127 error (_("Still connected."));
3130 target_preopen (from_tty);
3132 unpush_target (target);
3134 /* This time without a query. If we were connected to an
3135 extended-remote target and target_preopen killed the running
3136 process, we may still be connected. If we are starting "target
3137 remote" now, the extended-remote target will not have been
3138 removed by unpush_target. */
3139 if (remote_desc != NULL && !target_has_execution)
3142 /* Make sure we send the passed signals list the next time we resume. */
3143 xfree (last_pass_packet);
3144 last_pass_packet = NULL;
3146 remote_fileio_reset ();
3147 reopen_exec_file ();
3150 remote_desc = remote_serial_open (name);
3152 perror_with_name (name);
3154 if (baud_rate != -1)
3156 if (serial_setbaudrate (remote_desc, baud_rate))
3158 /* The requested speed could not be set. Error out to
3159 top level after closing remote_desc. Take care to
3160 set remote_desc to NULL to avoid closing remote_desc
3162 serial_close (remote_desc);
3164 perror_with_name (name);
3168 serial_raw (remote_desc);
3170 /* If there is something sitting in the buffer we might take it as a
3171 response to a command, which would be bad. */
3172 serial_flush_input (remote_desc);
3176 puts_filtered ("Remote debugging using ");
3177 puts_filtered (name);
3178 puts_filtered ("\n");
3180 push_target (target); /* Switch to using remote target now. */
3182 /* Assume that the target is not running, until we learn otherwise. */
3184 target_mark_exited (target);
3186 /* Register extra event sources in the event loop. */
3187 remote_async_inferior_event_token
3188 = create_async_event_handler (remote_async_inferior_event_handler,
3190 remote_async_get_pending_events_token
3191 = create_async_event_handler (remote_async_get_pending_events_handler,
3194 /* Reset the target state; these things will be queried either by
3195 remote_query_supported or as they are needed. */
3196 init_all_packet_configs ();
3197 rs->cached_wait_status = 0;
3198 rs->explicit_packet_size = 0;
3200 rs->multi_process_aware = 0;
3201 rs->extended = extended_p;
3202 rs->non_stop_aware = 0;
3203 rs->waiting_for_stop_reply = 0;
3205 general_thread = not_sent_ptid;
3206 continue_thread = not_sent_ptid;
3208 /* Probe for ability to use "ThreadInfo" query, as required. */
3209 use_threadinfo_query = 1;
3210 use_threadextra_query = 1;
3212 if (target_async_permitted)
3214 /* With this target we start out by owning the terminal. */
3215 remote_async_terminal_ours_p = 1;
3217 /* FIXME: cagney/1999-09-23: During the initial connection it is
3218 assumed that the target is already ready and able to respond to
3219 requests. Unfortunately remote_start_remote() eventually calls
3220 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
3221 around this. Eventually a mechanism that allows
3222 wait_for_inferior() to expect/get timeouts will be
3224 wait_forever_enabled_p = 0;
3227 /* First delete any symbols previously loaded from shared libraries. */
3228 no_shared_libraries (NULL, 0);
3231 init_thread_list ();
3233 /* Start the remote connection. If error() or QUIT, discard this
3234 target (we'd otherwise be in an inconsistent state) and then
3235 propogate the error on up the exception chain. This ensures that
3236 the caller doesn't stumble along blindly assuming that the
3237 function succeeded. The CLI doesn't have this problem but other
3238 UI's, such as MI do.
3240 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
3241 this function should return an error indication letting the
3242 caller restore the previous state. Unfortunately the command
3243 ``target remote'' is directly wired to this function making that
3244 impossible. On a positive note, the CLI side of this problem has
3245 been fixed - the function set_cmd_context() makes it possible for
3246 all the ``target ....'' commands to share a common callback
3247 function. See cli-dump.c. */
3249 struct gdb_exception ex;
3250 struct start_remote_args args;
3252 args.from_tty = from_tty;
3253 args.target = target;
3254 args.extended_p = extended_p;
3256 ex = catch_exception (uiout, remote_start_remote, &args, RETURN_MASK_ALL);
3259 /* Pop the partially set up target - unless something else did
3260 already before throwing the exception. */
3261 if (remote_desc != NULL)
3263 if (target_async_permitted)
3264 wait_forever_enabled_p = 1;
3265 throw_exception (ex);
3269 if (target_async_permitted)
3270 wait_forever_enabled_p = 1;
3273 /* This takes a program previously attached to and detaches it. After
3274 this is done, GDB can be used to debug some other program. We
3275 better not have left any breakpoints in the target program or it'll
3276 die when it hits one. */
3279 remote_detach_1 (char *args, int from_tty, int extended)
3281 int pid = ptid_get_pid (inferior_ptid);
3282 struct remote_state *rs = get_remote_state ();
3285 error (_("Argument given to \"detach\" when remotely debugging."));
3287 if (!target_has_execution)
3288 error (_("No process to detach from."));
3290 /* Tell the remote target to detach. */
3291 if (remote_multi_process_p (rs))
3292 sprintf (rs->buf, "D;%x", pid);
3294 strcpy (rs->buf, "D");
3297 getpkt (&rs->buf, &rs->buf_size, 0);
3299 if (rs->buf[0] == 'O' && rs->buf[1] == 'K')
3301 else if (rs->buf[0] == '\0')
3302 error (_("Remote doesn't know how to detach"));
3304 error (_("Can't detach process."));
3308 if (remote_multi_process_p (rs))
3309 printf_filtered (_("Detached from remote %s.\n"),
3310 target_pid_to_str (pid_to_ptid (pid)));
3314 puts_filtered (_("Detached from remote process.\n"));
3316 puts_filtered (_("Ending remote debugging.\n"));
3320 discard_pending_stop_replies (pid);
3321 detach_inferior (pid);
3322 target_mourn_inferior ();
3326 remote_detach (struct target_ops *ops, char *args, int from_tty)
3328 remote_detach_1 (args, from_tty, 0);
3332 extended_remote_detach (struct target_ops *ops, char *args, int from_tty)
3334 remote_detach_1 (args, from_tty, 1);
3337 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
3340 remote_disconnect (struct target_ops *target, char *args, int from_tty)
3343 error (_("Argument given to \"disconnect\" when remotely debugging."));
3345 /* Make sure we unpush even the extended remote targets; mourn
3346 won't do it. So call remote_mourn_1 directly instead of
3347 target_mourn_inferior. */
3348 remote_mourn_1 (target);
3351 puts_filtered ("Ending remote debugging.\n");
3354 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
3355 be chatty about it. */
3358 extended_remote_attach_1 (struct target_ops *target, char *args, int from_tty)
3360 struct remote_state *rs = get_remote_state ();
3363 char *wait_status = NULL;
3364 struct inferior *inf;
3367 error_no_arg (_("process-id to attach"));
3370 pid = strtol (args, &dummy, 0);
3371 /* Some targets don't set errno on errors, grrr! */
3372 if (pid == 0 && args == dummy)
3373 error (_("Illegal process-id: %s."), args);
3375 if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE)
3376 error (_("This target does not support attaching to a process"));
3378 sprintf (rs->buf, "vAttach;%x", pid);
3380 getpkt (&rs->buf, &rs->buf_size, 0);
3382 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vAttach]) == PACKET_OK)
3385 printf_unfiltered (_("Attached to %s\n"),
3386 target_pid_to_str (pid_to_ptid (pid)));
3390 /* Save the reply for later. */
3391 wait_status = alloca (strlen (rs->buf) + 1);
3392 strcpy (wait_status, rs->buf);
3394 else if (strcmp (rs->buf, "OK") != 0)
3395 error (_("Attaching to %s failed with: %s"),
3396 target_pid_to_str (pid_to_ptid (pid)),
3399 else if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE)
3400 error (_("This target does not support attaching to a process"));
3402 error (_("Attaching to %s failed"),
3403 target_pid_to_str (pid_to_ptid (pid)));
3405 target_mark_running (target);
3406 inferior_ptid = pid_to_ptid (pid);
3408 /* Now, if we have thread information, update inferior_ptid. */
3409 inferior_ptid = remote_current_thread (inferior_ptid);
3411 inf = add_inferior (pid);
3412 inf->attach_flag = 1;
3415 /* Get list of threads. */
3416 remote_threads_info ();
3418 /* Add the main thread to the thread list. */
3419 add_thread_silent (inferior_ptid);
3421 /* Next, if the target can specify a description, read it. We do
3422 this before anything involving memory or registers. */
3423 target_find_description ();
3427 /* Use the previously fetched status. */
3428 gdb_assert (wait_status != NULL);
3430 if (target_can_async_p ())
3432 struct stop_reply *stop_reply;
3433 struct cleanup *old_chain;
3435 stop_reply = stop_reply_xmalloc ();
3436 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
3437 remote_parse_stop_reply (wait_status, stop_reply);
3438 discard_cleanups (old_chain);
3439 push_stop_reply (stop_reply);
3441 target_async (inferior_event_handler, 0);
3445 gdb_assert (wait_status != NULL);
3446 strcpy (rs->buf, wait_status);
3447 rs->cached_wait_status = 1;
3451 gdb_assert (wait_status == NULL);
3455 extended_remote_attach (struct target_ops *ops, char *args, int from_tty)
3457 extended_remote_attach_1 (ops, args, from_tty);
3460 /* Convert hex digit A to a number. */
3465 if (a >= '0' && a <= '9')
3467 else if (a >= 'a' && a <= 'f')
3468 return a - 'a' + 10;
3469 else if (a >= 'A' && a <= 'F')
3470 return a - 'A' + 10;
3472 error (_("Reply contains invalid hex digit %d"), a);
3476 hex2bin (const char *hex, gdb_byte *bin, int count)
3480 for (i = 0; i < count; i++)
3482 if (hex[0] == 0 || hex[1] == 0)
3484 /* Hex string is short, or of uneven length.
3485 Return the count that has been converted so far. */
3488 *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]);
3494 /* Convert number NIB to a hex digit. */
3502 return 'a' + nib - 10;
3506 bin2hex (const gdb_byte *bin, char *hex, int count)
3509 /* May use a length, or a nul-terminated string as input. */
3511 count = strlen ((char *) bin);
3513 for (i = 0; i < count; i++)
3515 *hex++ = tohex ((*bin >> 4) & 0xf);
3516 *hex++ = tohex (*bin++ & 0xf);
3522 /* Check for the availability of vCont. This function should also check
3526 remote_vcont_probe (struct remote_state *rs)
3530 strcpy (rs->buf, "vCont?");
3532 getpkt (&rs->buf, &rs->buf_size, 0);
3535 /* Make sure that the features we assume are supported. */
3536 if (strncmp (buf, "vCont", 5) == 0)
3539 int support_s, support_S, support_c, support_C;
3545 rs->support_vCont_t = 0;
3546 while (p && *p == ';')
3549 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
3551 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
3553 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
3555 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
3557 else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0))
3558 rs->support_vCont_t = 1;
3560 p = strchr (p, ';');
3563 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
3564 BUF will make packet_ok disable the packet. */
3565 if (!support_s || !support_S || !support_c || !support_C)
3569 packet_ok (buf, &remote_protocol_packets[PACKET_vCont]);
3572 /* Resume the remote inferior by using a "vCont" packet. The thread
3573 to be resumed is PTID; STEP and SIGGNAL indicate whether the
3574 resumed thread should be single-stepped and/or signalled. If PTID
3575 equals minus_one_ptid, then all threads are resumed; the thread to
3576 be stepped and/or signalled is given in the global INFERIOR_PTID.
3577 This function returns non-zero iff it resumes the inferior.
3579 This function issues a strict subset of all possible vCont commands at the
3583 remote_vcont_resume (ptid_t ptid, int step, enum target_signal siggnal)
3585 struct remote_state *rs = get_remote_state ();
3589 if (remote_protocol_packets[PACKET_vCont].support == PACKET_SUPPORT_UNKNOWN)
3590 remote_vcont_probe (rs);
3592 if (remote_protocol_packets[PACKET_vCont].support == PACKET_DISABLE)
3596 endp = rs->buf + get_remote_packet_size ();
3598 /* If we could generate a wider range of packets, we'd have to worry
3599 about overflowing BUF. Should there be a generic
3600 "multi-part-packet" packet? */
3602 if (ptid_equal (ptid, magic_null_ptid))
3604 /* MAGIC_NULL_PTID means that we don't have any active threads,
3605 so we don't have any TID numbers the inferior will
3606 understand. Make sure to only send forms that do not specify
3608 if (step && siggnal != TARGET_SIGNAL_0)
3609 xsnprintf (p, endp - p, "vCont;S%02x", siggnal);
3611 xsnprintf (p, endp - p, "vCont;s");
3612 else if (siggnal != TARGET_SIGNAL_0)
3613 xsnprintf (p, endp - p, "vCont;C%02x", siggnal);
3615 xsnprintf (p, endp - p, "vCont;c");
3617 else if (ptid_equal (ptid, minus_one_ptid))
3619 /* Resume all threads, with preference for INFERIOR_PTID. */
3620 if (step && siggnal != TARGET_SIGNAL_0)
3622 /* Step inferior_ptid with signal. */
3623 p += xsnprintf (p, endp - p, "vCont;S%02x:", siggnal);
3624 p = write_ptid (p, endp, inferior_ptid);
3625 /* And continue others. */
3626 p += xsnprintf (p, endp - p, ";c");
3630 /* Step inferior_ptid. */
3631 p += xsnprintf (p, endp - p, "vCont;s:");
3632 p = write_ptid (p, endp, inferior_ptid);
3633 /* And continue others. */
3634 p += xsnprintf (p, endp - p, ";c");
3636 else if (siggnal != TARGET_SIGNAL_0)
3638 /* Continue inferior_ptid with signal. */
3639 p += xsnprintf (p, endp - p, "vCont;C%02x:", siggnal);
3640 p = write_ptid (p, endp, inferior_ptid);
3641 /* And continue others. */
3642 p += xsnprintf (p, endp - p, ";c");
3645 xsnprintf (p, endp - p, "vCont;c");
3649 /* Scheduler locking; resume only PTID. */
3650 if (step && siggnal != TARGET_SIGNAL_0)
3652 /* Step ptid with signal. */
3653 p += xsnprintf (p, endp - p, "vCont;S%02x:", siggnal);
3654 p = write_ptid (p, endp, ptid);
3659 p += xsnprintf (p, endp - p, "vCont;s:");
3660 p = write_ptid (p, endp, ptid);
3662 else if (siggnal != TARGET_SIGNAL_0)
3664 /* Continue ptid with signal. */
3665 p += xsnprintf (p, endp - p, "vCont;C%02x:", siggnal);
3666 p = write_ptid (p, endp, ptid);
3670 /* Continue ptid. */
3671 p += xsnprintf (p, endp - p, "vCont;c:");
3672 p = write_ptid (p, endp, ptid);
3676 gdb_assert (strlen (rs->buf) < get_remote_packet_size ());
3681 /* In non-stop, the stub replies to vCont with "OK". The stop
3682 reply will be reported asynchronously by means of a `%Stop'
3684 getpkt (&rs->buf, &rs->buf_size, 0);
3685 if (strcmp (rs->buf, "OK") != 0)
3686 error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf);
3692 /* Tell the remote machine to resume. */
3694 static enum target_signal last_sent_signal = TARGET_SIGNAL_0;
3696 static int last_sent_step;
3699 remote_resume (ptid_t ptid, int step, enum target_signal siggnal)
3701 struct remote_state *rs = get_remote_state ();
3704 last_sent_signal = siggnal;
3705 last_sent_step = step;
3707 /* Update the inferior on signals to silently pass, if they've changed. */
3708 remote_pass_signals ();
3710 /* The vCont packet doesn't need to specify threads via Hc. */
3711 if (remote_vcont_resume (ptid, step, siggnal))
3714 /* All other supported resume packets do use Hc, so set the continue
3716 if (ptid_equal (ptid, minus_one_ptid))
3717 set_continue_thread (any_thread_ptid);
3719 set_continue_thread (ptid);
3722 if (execution_direction == EXEC_REVERSE)
3724 /* We don't pass signals to the target in reverse exec mode. */
3725 if (info_verbose && siggnal != TARGET_SIGNAL_0)
3726 warning (" - Can't pass signal %d to target in reverse: ignored.\n",
3728 strcpy (buf, step ? "bs" : "bc");
3730 else if (siggnal != TARGET_SIGNAL_0)
3732 buf[0] = step ? 'S' : 'C';
3733 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
3734 buf[2] = tohex (((int) siggnal) & 0xf);
3738 strcpy (buf, step ? "s" : "c");
3743 /* We are about to start executing the inferior, let's register it
3744 with the event loop. NOTE: this is the one place where all the
3745 execution commands end up. We could alternatively do this in each
3746 of the execution commands in infcmd.c. */
3747 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
3748 into infcmd.c in order to allow inferior function calls to work
3749 NOT asynchronously. */
3750 if (target_can_async_p ())
3751 target_async (inferior_event_handler, 0);
3753 /* We've just told the target to resume. The remote server will
3754 wait for the inferior to stop, and then send a stop reply. In
3755 the mean time, we can't start another command/query ourselves
3756 because the stub wouldn't be ready to process it. This applies
3757 only to the base all-stop protocol, however. In non-stop (which
3758 only supports vCont), the stub replies with an "OK", and is
3759 immediate able to process further serial input. */
3761 rs->waiting_for_stop_reply = 1;
3765 /* Set up the signal handler for SIGINT, while the target is
3766 executing, ovewriting the 'regular' SIGINT signal handler. */
3768 initialize_sigint_signal_handler (void)
3770 signal (SIGINT, handle_remote_sigint);
3773 /* Signal handler for SIGINT, while the target is executing. */
3775 handle_remote_sigint (int sig)
3777 signal (sig, handle_remote_sigint_twice);
3778 mark_async_signal_handler_wrapper (sigint_remote_token);
3781 /* Signal handler for SIGINT, installed after SIGINT has already been
3782 sent once. It will take effect the second time that the user sends
3785 handle_remote_sigint_twice (int sig)
3787 signal (sig, handle_remote_sigint);
3788 mark_async_signal_handler_wrapper (sigint_remote_twice_token);
3791 /* Perform the real interruption of the target execution, in response
3794 async_remote_interrupt (gdb_client_data arg)
3797 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
3799 target_stop (inferior_ptid);
3802 /* Perform interrupt, if the first attempt did not succeed. Just give
3803 up on the target alltogether. */
3805 async_remote_interrupt_twice (gdb_client_data arg)
3808 fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n");
3813 /* Reinstall the usual SIGINT handlers, after the target has
3816 cleanup_sigint_signal_handler (void *dummy)
3818 signal (SIGINT, handle_sigint);
3821 /* Send ^C to target to halt it. Target will respond, and send us a
3823 static void (*ofunc) (int);
3825 /* The command line interface's stop routine. This function is installed
3826 as a signal handler for SIGINT. The first time a user requests a
3827 stop, we call remote_stop to send a break or ^C. If there is no
3828 response from the target (it didn't stop when the user requested it),
3829 we ask the user if he'd like to detach from the target. */
3831 remote_interrupt (int signo)
3833 /* If this doesn't work, try more severe steps. */
3834 signal (signo, remote_interrupt_twice);
3836 gdb_call_async_signal_handler (sigint_remote_token, 1);
3839 /* The user typed ^C twice. */
3842 remote_interrupt_twice (int signo)
3844 signal (signo, ofunc);
3845 gdb_call_async_signal_handler (sigint_remote_twice_token, 1);
3846 signal (signo, remote_interrupt);
3849 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
3850 thread, all threads of a remote process, or all threads of all
3854 remote_stop_ns (ptid_t ptid)
3856 struct remote_state *rs = get_remote_state ();
3858 char *endp = rs->buf + get_remote_packet_size ();
3859 struct stop_reply *reply, *next;
3861 if (remote_protocol_packets[PACKET_vCont].support == PACKET_SUPPORT_UNKNOWN)
3862 remote_vcont_probe (rs);
3864 if (!rs->support_vCont_t)
3865 error (_("Remote server does not support stopping threads"));
3867 if (ptid_equal (ptid, minus_one_ptid))
3868 p += xsnprintf (p, endp - p, "vCont;t");
3873 /* Step inferior_ptid. */
3874 p += xsnprintf (p, endp - p, "vCont;t:");
3876 if (ptid_is_pid (ptid))
3877 /* All (-1) threads of process. */
3878 nptid = ptid_build (ptid_get_pid (ptid), 0, -1);
3881 /* Small optimization: if we already have a stop reply for
3882 this thread, no use in telling the stub we want this
3884 if (peek_stop_reply (ptid))
3890 p = write_ptid (p, endp, nptid);
3893 /* In non-stop, we get an immediate OK reply. The stop reply will
3894 come in asynchronously by notification. */
3896 getpkt (&rs->buf, &rs->buf_size, 0);
3897 if (strcmp (rs->buf, "OK") != 0)
3898 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid), rs->buf);
3901 /* All-stop version of target_stop. Sends a break or a ^C to stop the
3902 remote target. It is undefined which thread of which process
3903 reports the stop. */
3906 remote_stop_as (ptid_t ptid)
3908 struct remote_state *rs = get_remote_state ();
3910 /* If the inferior is stopped already, but the core didn't know
3911 about it yet, just ignore the request. The cached wait status
3912 will be collected in remote_wait. */
3913 if (rs->cached_wait_status)
3916 /* Send a break or a ^C, depending on user preference. */
3919 serial_send_break (remote_desc);
3921 serial_write (remote_desc, "\003", 1);
3924 /* This is the generic stop called via the target vector. When a target
3925 interrupt is requested, either by the command line or the GUI, we
3926 will eventually end up here. */
3929 remote_stop (ptid_t ptid)
3932 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
3935 remote_stop_ns (ptid);
3937 remote_stop_as (ptid);
3940 /* Ask the user what to do when an interrupt is received. */
3943 interrupt_query (void)
3945 target_terminal_ours ();
3947 if (target_can_async_p ())
3949 signal (SIGINT, handle_sigint);
3950 deprecated_throw_reason (RETURN_QUIT);
3954 if (query ("Interrupted while waiting for the program.\n\
3955 Give up (and stop debugging it)? "))
3958 deprecated_throw_reason (RETURN_QUIT);
3962 target_terminal_inferior ();
3965 /* Enable/disable target terminal ownership. Most targets can use
3966 terminal groups to control terminal ownership. Remote targets are
3967 different in that explicit transfer of ownership to/from GDB/target
3971 remote_terminal_inferior (void)
3973 if (!target_async_permitted)
3974 /* Nothing to do. */
3977 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
3978 sync_execution here. This function should only be called when
3979 GDB is resuming the inferior in the forground. A background
3980 resume (``run&'') should leave GDB in control of the terminal and
3981 consequently should not call this code. */
3982 if (!sync_execution)
3984 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
3985 calls target_terminal_*() idenpotent. The event-loop GDB talking
3986 to an asynchronous target with a synchronous command calls this
3987 function from both event-top.c and infrun.c/infcmd.c. Once GDB
3988 stops trying to transfer the terminal to the target when it
3989 shouldn't this guard can go away. */
3990 if (!remote_async_terminal_ours_p)
3992 delete_file_handler (input_fd);
3993 remote_async_terminal_ours_p = 0;
3994 initialize_sigint_signal_handler ();
3995 /* NOTE: At this point we could also register our selves as the
3996 recipient of all input. Any characters typed could then be
3997 passed on down to the target. */
4001 remote_terminal_ours (void)
4003 if (!target_async_permitted)
4004 /* Nothing to do. */
4007 /* See FIXME in remote_terminal_inferior. */
4008 if (!sync_execution)
4010 /* See FIXME in remote_terminal_inferior. */
4011 if (remote_async_terminal_ours_p)
4013 cleanup_sigint_signal_handler (NULL);
4014 add_file_handler (input_fd, stdin_event_handler, 0);
4015 remote_async_terminal_ours_p = 1;
4019 remote_console_output (char *msg)
4023 for (p = msg; p[0] && p[1]; p += 2)
4026 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
4029 fputs_unfiltered (tb, gdb_stdtarg);
4031 gdb_flush (gdb_stdtarg);
4034 typedef struct cached_reg
4037 gdb_byte data[MAX_REGISTER_SIZE];
4040 DEF_VEC_O(cached_reg_t);
4044 struct stop_reply *next;
4048 struct target_waitstatus ws;
4050 VEC(cached_reg_t) *regcache;
4052 int stopped_by_watchpoint_p;
4053 CORE_ADDR watch_data_address;
4059 /* The list of already fetched and acknowledged stop events. */
4060 static struct stop_reply *stop_reply_queue;
4062 static struct stop_reply *
4063 stop_reply_xmalloc (void)
4065 struct stop_reply *r = XMALLOC (struct stop_reply);
4071 stop_reply_xfree (struct stop_reply *r)
4075 VEC_free (cached_reg_t, r->regcache);
4080 /* Discard all pending stop replies of inferior PID. If PID is -1,
4081 discard everything. */
4084 discard_pending_stop_replies (int pid)
4086 struct stop_reply *prev = NULL, *reply, *next;
4088 /* Discard the in-flight notification. */
4089 if (pending_stop_reply != NULL
4091 || ptid_get_pid (pending_stop_reply->ptid) == pid))
4093 stop_reply_xfree (pending_stop_reply);
4094 pending_stop_reply = NULL;
4097 /* Discard the stop replies we have already pulled with
4099 for (reply = stop_reply_queue; reply; reply = next)
4103 || ptid_get_pid (reply->ptid) == pid)
4105 if (reply == stop_reply_queue)
4106 stop_reply_queue = reply->next;
4108 prev->next = reply->next;
4110 stop_reply_xfree (reply);
4117 /* Cleanup wrapper. */
4120 do_stop_reply_xfree (void *arg)
4122 struct stop_reply *r = arg;
4123 stop_reply_xfree (r);
4126 /* Look for a queued stop reply belonging to PTID. If one is found,
4127 remove it from the queue, and return it. Returns NULL if none is
4128 found. If there are still queued events left to process, tell the
4129 event loop to get back to target_wait soon. */
4131 static struct stop_reply *
4132 queued_stop_reply (ptid_t ptid)
4134 struct stop_reply *it, *prev;
4135 struct stop_reply head;
4137 head.next = stop_reply_queue;
4142 if (!ptid_equal (ptid, minus_one_ptid))
4143 for (; it; prev = it, it = it->next)
4144 if (ptid_equal (ptid, it->ptid))
4149 prev->next = it->next;
4153 stop_reply_queue = head.next;
4155 if (stop_reply_queue)
4156 /* There's still at least an event left. */
4157 mark_async_event_handler (remote_async_inferior_event_token);
4162 /* Push a fully parsed stop reply in the stop reply queue. Since we
4163 know that we now have at least one queued event left to pass to the
4164 core side, tell the event loop to get back to target_wait soon. */
4167 push_stop_reply (struct stop_reply *new_event)
4169 struct stop_reply *event;
4171 if (stop_reply_queue)
4173 for (event = stop_reply_queue;
4174 event && event->next;
4175 event = event->next)
4178 event->next = new_event;
4181 stop_reply_queue = new_event;
4183 mark_async_event_handler (remote_async_inferior_event_token);
4186 /* Returns true if we have a stop reply for PTID. */
4189 peek_stop_reply (ptid_t ptid)
4191 struct stop_reply *it;
4193 for (it = stop_reply_queue; it; it = it->next)
4194 if (ptid_equal (ptid, it->ptid))
4196 if (it->ws.kind == TARGET_WAITKIND_STOPPED)
4203 /* Parse the stop reply in BUF. Either the function succeeds, and the
4204 result is stored in EVENT, or throws an error. */
4207 remote_parse_stop_reply (char *buf, struct stop_reply *event)
4209 struct remote_arch_state *rsa = get_remote_arch_state ();
4213 event->ptid = null_ptid;
4214 event->ws.kind = TARGET_WAITKIND_IGNORE;
4215 event->ws.value.integer = 0;
4216 event->solibs_changed = 0;
4217 event->replay_event = 0;
4218 event->stopped_by_watchpoint_p = 0;
4219 event->regcache = NULL;
4223 case 'T': /* Status with PC, SP, FP, ... */
4225 gdb_byte regs[MAX_REGISTER_SIZE];
4227 /* Expedited reply, containing Signal, {regno, reg} repeat. */
4228 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
4230 n... = register number
4231 r... = register contents
4234 p = &buf[3]; /* after Txx */
4242 /* If the packet contains a register number, save it in
4243 pnum and set p1 to point to the character following it.
4244 Otherwise p1 points to p. */
4246 /* If this packet is an awatch packet, don't parse the 'a'
4247 as a register number. */
4249 if (strncmp (p, "awatch", strlen("awatch")) != 0)
4251 /* Read the ``P'' register number. */
4252 pnum = strtol (p, &p_temp, 16);
4258 if (p1 == p) /* No register number present here. */
4260 p1 = strchr (p, ':');
4262 error (_("Malformed packet(a) (missing colon): %s\n\
4265 if (strncmp (p, "thread", p1 - p) == 0)
4266 event->ptid = read_ptid (++p1, &p);
4267 else if ((strncmp (p, "watch", p1 - p) == 0)
4268 || (strncmp (p, "rwatch", p1 - p) == 0)
4269 || (strncmp (p, "awatch", p1 - p) == 0))
4271 event->stopped_by_watchpoint_p = 1;
4272 p = unpack_varlen_hex (++p1, &addr);
4273 event->watch_data_address = (CORE_ADDR) addr;
4275 else if (strncmp (p, "library", p1 - p) == 0)
4279 while (*p_temp && *p_temp != ';')
4282 event->solibs_changed = 1;
4285 else if (strncmp (p, "replaylog", p1 - p) == 0)
4287 /* NO_HISTORY event.
4288 p1 will indicate "begin" or "end", but
4289 it makes no difference for now, so ignore it. */
4290 event->replay_event = 1;
4291 p_temp = strchr (p1 + 1, ';');
4297 /* Silently skip unknown optional info. */
4298 p_temp = strchr (p1 + 1, ';');
4305 struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum);
4306 cached_reg_t cached_reg;
4311 error (_("Malformed packet(b) (missing colon): %s\n\
4317 error (_("Remote sent bad register number %s: %s\n\
4319 phex_nz (pnum, 0), p, buf);
4321 cached_reg.num = reg->regnum;
4323 fieldsize = hex2bin (p, cached_reg.data,
4324 register_size (target_gdbarch,
4327 if (fieldsize < register_size (target_gdbarch,
4329 warning (_("Remote reply is too short: %s"), buf);
4331 VEC_safe_push (cached_reg_t, event->regcache, &cached_reg);
4335 error (_("Remote register badly formatted: %s\nhere: %s"),
4341 case 'S': /* Old style status, just signal only. */
4342 if (event->solibs_changed)
4343 event->ws.kind = TARGET_WAITKIND_LOADED;
4344 else if (event->replay_event)
4345 event->ws.kind = TARGET_WAITKIND_NO_HISTORY;
4348 event->ws.kind = TARGET_WAITKIND_STOPPED;
4349 event->ws.value.sig = (enum target_signal)
4350 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
4353 case 'W': /* Target exited. */
4360 /* GDB used to accept only 2 hex chars here. Stubs should
4361 only send more if they detect GDB supports multi-process
4363 p = unpack_varlen_hex (&buf[1], &value);
4367 /* The remote process exited. */
4368 event->ws.kind = TARGET_WAITKIND_EXITED;
4369 event->ws.value.integer = value;
4373 /* The remote process exited with a signal. */
4374 event->ws.kind = TARGET_WAITKIND_SIGNALLED;
4375 event->ws.value.sig = (enum target_signal) value;
4378 /* If no process is specified, assume inferior_ptid. */
4379 pid = ptid_get_pid (inferior_ptid);
4388 else if (strncmp (p,
4389 "process:", sizeof ("process:") - 1) == 0)
4392 p += sizeof ("process:") - 1;
4393 unpack_varlen_hex (p, &upid);
4397 error (_("unknown stop reply packet: %s"), buf);
4400 error (_("unknown stop reply packet: %s"), buf);
4401 event->ptid = pid_to_ptid (pid);
4406 if (non_stop && ptid_equal (event->ptid, null_ptid))
4407 error (_("No process or thread specified in stop reply: %s"), buf);
4410 /* When the stub wants to tell GDB about a new stop reply, it sends a
4411 stop notification (%Stop). Those can come it at any time, hence,
4412 we have to make sure that any pending putpkt/getpkt sequence we're
4413 making is finished, before querying the stub for more events with
4414 vStopped. E.g., if we started a vStopped sequence immediatelly
4415 upon receiving the %Stop notification, something like this could
4423 1.6) <-- (registers reply to step #1.3)
4425 Obviously, the reply in step #1.6 would be unexpected to a vStopped
4428 To solve this, whenever we parse a %Stop notification sucessfully,
4429 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
4430 doing whatever we were doing:
4436 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
4437 2.5) <-- (registers reply to step #2.3)
4439 Eventualy after step #2.5, we return to the event loop, which
4440 notices there's an event on the
4441 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
4442 associated callback --- the function below. At this point, we're
4443 always safe to start a vStopped sequence. :
4446 2.7) <-- T05 thread:2
4452 remote_get_pending_stop_replies (void)
4454 struct remote_state *rs = get_remote_state ();
4457 if (pending_stop_reply)
4460 putpkt ("vStopped");
4462 /* Now we can rely on it. */
4463 push_stop_reply (pending_stop_reply);
4464 pending_stop_reply = NULL;
4468 getpkt (&rs->buf, &rs->buf_size, 0);
4469 if (strcmp (rs->buf, "OK") == 0)
4473 struct cleanup *old_chain;
4474 struct stop_reply *stop_reply = stop_reply_xmalloc ();
4476 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
4477 remote_parse_stop_reply (rs->buf, stop_reply);
4480 putpkt ("vStopped");
4482 if (stop_reply->ws.kind != TARGET_WAITKIND_IGNORE)
4484 /* Now we can rely on it. */
4485 discard_cleanups (old_chain);
4486 push_stop_reply (stop_reply);
4489 /* We got an unknown stop reply. */
4490 do_cleanups (old_chain);
4497 /* Called when it is decided that STOP_REPLY holds the info of the
4498 event that is to be returned to the core. This function always
4499 destroys STOP_REPLY. */
4502 process_stop_reply (struct stop_reply *stop_reply,
4503 struct target_waitstatus *status)
4507 *status = stop_reply->ws;
4508 ptid = stop_reply->ptid;
4510 /* If no thread/process was reported by the stub, assume the current
4512 if (ptid_equal (ptid, null_ptid))
4513 ptid = inferior_ptid;
4515 if (status->kind == TARGET_WAITKIND_EXITED
4516 || status->kind == TARGET_WAITKIND_SIGNALLED)
4518 int pid = ptid_get_pid (ptid);
4519 delete_inferior (pid);
4522 notice_new_inferiors (ptid);
4524 /* Expedited registers. */
4525 if (stop_reply->regcache)
4531 VEC_iterate(cached_reg_t, stop_reply->regcache, ix, reg);
4533 regcache_raw_supply (get_thread_regcache (ptid),
4534 reg->num, reg->data);
4535 VEC_free (cached_reg_t, stop_reply->regcache);
4538 remote_stopped_by_watchpoint_p = stop_reply->stopped_by_watchpoint_p;
4539 remote_watch_data_address = stop_reply->watch_data_address;
4541 stop_reply_xfree (stop_reply);
4545 /* The non-stop mode version of target_wait. */
4548 remote_wait_ns (ptid_t ptid, struct target_waitstatus *status)
4550 struct remote_state *rs = get_remote_state ();
4551 struct remote_arch_state *rsa = get_remote_arch_state ();
4552 ptid_t event_ptid = null_ptid;
4553 struct stop_reply *stop_reply;
4556 /* If in non-stop mode, get out of getpkt even if a
4557 notification is received. */
4559 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
4566 case 'E': /* Error of some sort. */
4567 /* We're out of sync with the target now. Did it continue
4568 or not? We can't tell which thread it was in non-stop,
4569 so just ignore this. */
4570 warning (_("Remote failure reply: %s"), rs->buf);
4572 case 'O': /* Console output. */
4573 remote_console_output (rs->buf + 1);
4576 warning (_("Invalid remote reply: %s"), rs->buf);
4580 /* Acknowledge a pending stop reply that may have arrived in the
4582 if (pending_stop_reply != NULL)
4583 remote_get_pending_stop_replies ();
4585 /* If indeed we noticed a stop reply, we're done. */
4586 stop_reply = queued_stop_reply (ptid);
4587 if (stop_reply != NULL)
4588 return process_stop_reply (stop_reply, status);
4590 /* Still no event. If we're in asynchronous mode, then just
4591 return to the event loop. */
4592 if (remote_is_async_p ())
4594 status->kind = TARGET_WAITKIND_IGNORE;
4595 return minus_one_ptid;
4598 /* Otherwise, asynchronous mode is masked, so do a blocking
4600 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
4605 /* Wait until the remote machine stops, then return, storing status in
4606 STATUS just as `wait' would. */
4609 remote_wait_as (ptid_t ptid, struct target_waitstatus *status)
4611 struct remote_state *rs = get_remote_state ();
4612 struct remote_arch_state *rsa = get_remote_arch_state ();
4613 ptid_t event_ptid = null_ptid;
4615 int solibs_changed = 0;
4617 struct stop_reply *stop_reply;
4619 status->kind = TARGET_WAITKIND_IGNORE;
4620 status->value.integer = 0;
4622 stop_reply = queued_stop_reply (ptid);
4623 if (stop_reply != NULL)
4624 return process_stop_reply (stop_reply, status);
4626 if (rs->cached_wait_status)
4627 /* Use the cached wait status, but only once. */
4628 rs->cached_wait_status = 0;
4633 if (!target_is_async_p ())
4635 ofunc = signal (SIGINT, remote_interrupt);
4636 /* If the user hit C-c before this packet, or between packets,
4637 pretend that it was hit right here. */
4641 remote_interrupt (SIGINT);
4645 /* FIXME: cagney/1999-09-27: If we're in async mode we should
4646 _never_ wait for ever -> test on target_is_async_p().
4647 However, before we do that we need to ensure that the caller
4648 knows how to take the target into/out of async mode. */
4649 ret = getpkt_sane (&rs->buf, &rs->buf_size, wait_forever_enabled_p);
4650 if (!target_is_async_p ())
4651 signal (SIGINT, ofunc);
4656 remote_stopped_by_watchpoint_p = 0;
4658 /* We got something. */
4659 rs->waiting_for_stop_reply = 0;
4663 case 'E': /* Error of some sort. */
4664 /* We're out of sync with the target now. Did it continue or
4665 not? Not is more likely, so report a stop. */
4666 warning (_("Remote failure reply: %s"), buf);
4667 status->kind = TARGET_WAITKIND_STOPPED;
4668 status->value.sig = TARGET_SIGNAL_0;
4670 case 'F': /* File-I/O request. */
4671 remote_fileio_request (buf);
4673 case 'T': case 'S': case 'X': case 'W':
4675 struct stop_reply *stop_reply;
4676 struct cleanup *old_chain;
4678 stop_reply = stop_reply_xmalloc ();
4679 old_chain = make_cleanup (do_stop_reply_xfree, stop_reply);
4680 remote_parse_stop_reply (buf, stop_reply);
4681 discard_cleanups (old_chain);
4682 event_ptid = process_stop_reply (stop_reply, status);
4685 case 'O': /* Console output. */
4686 remote_console_output (buf + 1);
4688 /* The target didn't really stop; keep waiting. */
4689 rs->waiting_for_stop_reply = 1;
4693 if (last_sent_signal != TARGET_SIGNAL_0)
4695 /* Zero length reply means that we tried 'S' or 'C' and the
4696 remote system doesn't support it. */
4697 target_terminal_ours_for_output ();
4699 ("Can't send signals to this remote system. %s not sent.\n",
4700 target_signal_to_name (last_sent_signal));
4701 last_sent_signal = TARGET_SIGNAL_0;
4702 target_terminal_inferior ();
4704 strcpy ((char *) buf, last_sent_step ? "s" : "c");
4705 putpkt ((char *) buf);
4707 /* We just told the target to resume, so a stop reply is in
4709 rs->waiting_for_stop_reply = 1;
4712 /* else fallthrough */
4714 warning (_("Invalid remote reply: %s"), buf);
4716 rs->waiting_for_stop_reply = 1;
4720 if (status->kind == TARGET_WAITKIND_IGNORE)
4721 /* Nothing interesting happened. */
4722 return minus_one_ptid;
4723 else if (status->kind != TARGET_WAITKIND_EXITED
4724 && status->kind != TARGET_WAITKIND_SIGNALLED)
4726 if (!ptid_equal (event_ptid, null_ptid))
4727 record_currthread (event_ptid);
4729 event_ptid = inferior_ptid;
4732 /* A process exit. Invalidate our notion of current thread. */
4733 record_currthread (minus_one_ptid);
4738 /* Wait until the remote machine stops, then return, storing status in
4739 STATUS just as `wait' would. */
4742 remote_wait (ptid_t ptid, struct target_waitstatus *status)
4747 event_ptid = remote_wait_ns (ptid, status);
4750 /* In synchronous mode, keep waiting until the target stops. In
4751 asynchronous mode, always return to the event loop. */
4755 event_ptid = remote_wait_as (ptid, status);
4757 while (status->kind == TARGET_WAITKIND_IGNORE
4758 && !target_can_async_p ());
4761 if (target_can_async_p ())
4763 /* If there are are events left in the queue tell the event loop
4765 if (stop_reply_queue)
4766 mark_async_event_handler (remote_async_inferior_event_token);
4772 /* Fetch a single register using a 'p' packet. */
4775 fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg)
4777 struct remote_state *rs = get_remote_state ();
4779 char regp[MAX_REGISTER_SIZE];
4782 if (remote_protocol_packets[PACKET_p].support == PACKET_DISABLE)
4785 if (reg->pnum == -1)
4790 p += hexnumstr (p, reg->pnum);
4792 remote_send (&rs->buf, &rs->buf_size);
4796 switch (packet_ok (buf, &remote_protocol_packets[PACKET_p]))
4800 case PACKET_UNKNOWN:
4803 error (_("Could not fetch register \"%s\""),
4804 gdbarch_register_name (get_regcache_arch (regcache), reg->regnum));
4807 /* If this register is unfetchable, tell the regcache. */
4810 regcache_raw_supply (regcache, reg->regnum, NULL);
4814 /* Otherwise, parse and supply the value. */
4820 error (_("fetch_register_using_p: early buf termination"));
4822 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
4825 regcache_raw_supply (regcache, reg->regnum, regp);
4829 /* Fetch the registers included in the target's 'g' packet. */
4832 send_g_packet (void)
4834 struct remote_state *rs = get_remote_state ();
4839 sprintf (rs->buf, "g");
4840 remote_send (&rs->buf, &rs->buf_size);
4842 /* We can get out of synch in various cases. If the first character
4843 in the buffer is not a hex character, assume that has happened
4844 and try to fetch another packet to read. */
4845 while ((rs->buf[0] < '0' || rs->buf[0] > '9')
4846 && (rs->buf[0] < 'A' || rs->buf[0] > 'F')
4847 && (rs->buf[0] < 'a' || rs->buf[0] > 'f')
4848 && rs->buf[0] != 'x') /* New: unavailable register value. */
4851 fprintf_unfiltered (gdb_stdlog,
4852 "Bad register packet; fetching a new packet\n");
4853 getpkt (&rs->buf, &rs->buf_size, 0);
4856 buf_len = strlen (rs->buf);
4858 /* Sanity check the received packet. */
4859 if (buf_len % 2 != 0)
4860 error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf);
4866 process_g_packet (struct regcache *regcache)
4868 struct gdbarch *gdbarch = get_regcache_arch (regcache);
4869 struct remote_state *rs = get_remote_state ();
4870 struct remote_arch_state *rsa = get_remote_arch_state ();
4875 buf_len = strlen (rs->buf);
4877 /* Further sanity checks, with knowledge of the architecture. */
4878 if (buf_len > 2 * rsa->sizeof_g_packet)
4879 error (_("Remote 'g' packet reply is too long: %s"), rs->buf);
4881 /* Save the size of the packet sent to us by the target. It is used
4882 as a heuristic when determining the max size of packets that the
4883 target can safely receive. */
4884 if (rsa->actual_register_packet_size == 0)
4885 rsa->actual_register_packet_size = buf_len;
4887 /* If this is smaller than we guessed the 'g' packet would be,
4888 update our records. A 'g' reply that doesn't include a register's
4889 value implies either that the register is not available, or that
4890 the 'p' packet must be used. */
4891 if (buf_len < 2 * rsa->sizeof_g_packet)
4893 rsa->sizeof_g_packet = buf_len / 2;
4895 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
4897 if (rsa->regs[i].pnum == -1)
4900 if (rsa->regs[i].offset >= rsa->sizeof_g_packet)
4901 rsa->regs[i].in_g_packet = 0;
4903 rsa->regs[i].in_g_packet = 1;
4907 regs = alloca (rsa->sizeof_g_packet);
4909 /* Unimplemented registers read as all bits zero. */
4910 memset (regs, 0, rsa->sizeof_g_packet);
4912 /* Reply describes registers byte by byte, each byte encoded as two
4913 hex characters. Suck them all up, then supply them to the
4914 register cacheing/storage mechanism. */
4917 for (i = 0; i < rsa->sizeof_g_packet; i++)
4919 if (p[0] == 0 || p[1] == 0)
4920 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
4921 internal_error (__FILE__, __LINE__,
4922 "unexpected end of 'g' packet reply");
4924 if (p[0] == 'x' && p[1] == 'x')
4925 regs[i] = 0; /* 'x' */
4927 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
4933 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
4935 struct packet_reg *r = &rsa->regs[i];
4938 if (r->offset * 2 >= strlen (rs->buf))
4939 /* This shouldn't happen - we adjusted in_g_packet above. */
4940 internal_error (__FILE__, __LINE__,
4941 "unexpected end of 'g' packet reply");
4942 else if (rs->buf[r->offset * 2] == 'x')
4944 gdb_assert (r->offset * 2 < strlen (rs->buf));
4945 /* The register isn't available, mark it as such (at
4946 the same time setting the value to zero). */
4947 regcache_raw_supply (regcache, r->regnum, NULL);
4950 regcache_raw_supply (regcache, r->regnum,
4958 fetch_registers_using_g (struct regcache *regcache)
4961 process_g_packet (regcache);
4965 remote_fetch_registers (struct regcache *regcache, int regnum)
4967 struct remote_state *rs = get_remote_state ();
4968 struct remote_arch_state *rsa = get_remote_arch_state ();
4971 set_general_thread (inferior_ptid);
4975 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
4976 gdb_assert (reg != NULL);
4978 /* If this register might be in the 'g' packet, try that first -
4979 we are likely to read more than one register. If this is the
4980 first 'g' packet, we might be overly optimistic about its
4981 contents, so fall back to 'p'. */
4982 if (reg->in_g_packet)
4984 fetch_registers_using_g (regcache);
4985 if (reg->in_g_packet)
4989 if (fetch_register_using_p (regcache, reg))
4992 /* This register is not available. */
4993 regcache_raw_supply (regcache, reg->regnum, NULL);
4998 fetch_registers_using_g (regcache);
5000 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
5001 if (!rsa->regs[i].in_g_packet)
5002 if (!fetch_register_using_p (regcache, &rsa->regs[i]))
5004 /* This register is not available. */
5005 regcache_raw_supply (regcache, i, NULL);
5009 /* Prepare to store registers. Since we may send them all (using a
5010 'G' request), we have to read out the ones we don't want to change
5014 remote_prepare_to_store (struct regcache *regcache)
5016 struct remote_arch_state *rsa = get_remote_arch_state ();
5018 gdb_byte buf[MAX_REGISTER_SIZE];
5020 /* Make sure the entire registers array is valid. */
5021 switch (remote_protocol_packets[PACKET_P].support)
5023 case PACKET_DISABLE:
5024 case PACKET_SUPPORT_UNKNOWN:
5025 /* Make sure all the necessary registers are cached. */
5026 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
5027 if (rsa->regs[i].in_g_packet)
5028 regcache_raw_read (regcache, rsa->regs[i].regnum, buf);
5035 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
5036 packet was not recognized. */
5039 store_register_using_P (const struct regcache *regcache, struct packet_reg *reg)
5041 struct gdbarch *gdbarch = get_regcache_arch (regcache);
5042 struct remote_state *rs = get_remote_state ();
5043 struct remote_arch_state *rsa = get_remote_arch_state ();
5044 /* Try storing a single register. */
5045 char *buf = rs->buf;
5046 gdb_byte regp[MAX_REGISTER_SIZE];
5049 if (remote_protocol_packets[PACKET_P].support == PACKET_DISABLE)
5052 if (reg->pnum == -1)
5055 xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0));
5056 p = buf + strlen (buf);
5057 regcache_raw_collect (regcache, reg->regnum, regp);
5058 bin2hex (regp, p, register_size (gdbarch, reg->regnum));
5059 remote_send (&rs->buf, &rs->buf_size);
5061 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P]))
5066 error (_("Could not write register \"%s\""),
5067 gdbarch_register_name (gdbarch, reg->regnum));
5068 case PACKET_UNKNOWN:
5071 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
5075 /* Store register REGNUM, or all registers if REGNUM == -1, from the
5076 contents of the register cache buffer. FIXME: ignores errors. */
5079 store_registers_using_G (const struct regcache *regcache)
5081 struct remote_state *rs = get_remote_state ();
5082 struct remote_arch_state *rsa = get_remote_arch_state ();
5086 /* Extract all the registers in the regcache copying them into a
5090 regs = alloca (rsa->sizeof_g_packet);
5091 memset (regs, 0, rsa->sizeof_g_packet);
5092 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
5094 struct packet_reg *r = &rsa->regs[i];
5096 regcache_raw_collect (regcache, r->regnum, regs + r->offset);
5100 /* Command describes registers byte by byte,
5101 each byte encoded as two hex characters. */
5104 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
5106 bin2hex (regs, p, rsa->sizeof_g_packet);
5107 remote_send (&rs->buf, &rs->buf_size);
5110 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
5111 of the register cache buffer. FIXME: ignores errors. */
5114 remote_store_registers (struct regcache *regcache, int regnum)
5116 struct remote_state *rs = get_remote_state ();
5117 struct remote_arch_state *rsa = get_remote_arch_state ();
5120 set_general_thread (inferior_ptid);
5124 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
5125 gdb_assert (reg != NULL);
5127 /* Always prefer to store registers using the 'P' packet if
5128 possible; we often change only a small number of registers.
5129 Sometimes we change a larger number; we'd need help from a
5130 higher layer to know to use 'G'. */
5131 if (store_register_using_P (regcache, reg))
5134 /* For now, don't complain if we have no way to write the
5135 register. GDB loses track of unavailable registers too
5136 easily. Some day, this may be an error. We don't have
5137 any way to read the register, either... */
5138 if (!reg->in_g_packet)
5141 store_registers_using_G (regcache);
5145 store_registers_using_G (regcache);
5147 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
5148 if (!rsa->regs[i].in_g_packet)
5149 if (!store_register_using_P (regcache, &rsa->regs[i]))
5150 /* See above for why we do not issue an error here. */
5155 /* Return the number of hex digits in num. */
5158 hexnumlen (ULONGEST num)
5162 for (i = 0; num != 0; i++)
5168 /* Set BUF to the minimum number of hex digits representing NUM. */
5171 hexnumstr (char *buf, ULONGEST num)
5173 int len = hexnumlen (num);
5174 return hexnumnstr (buf, num, len);
5178 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
5181 hexnumnstr (char *buf, ULONGEST num, int width)
5187 for (i = width - 1; i >= 0; i--)
5189 buf[i] = "0123456789abcdef"[(num & 0xf)];
5196 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
5199 remote_address_masked (CORE_ADDR addr)
5201 int address_size = remote_address_size;
5202 /* If "remoteaddresssize" was not set, default to target address size. */
5204 address_size = gdbarch_addr_bit (target_gdbarch);
5206 if (address_size > 0
5207 && address_size < (sizeof (ULONGEST) * 8))
5209 /* Only create a mask when that mask can safely be constructed
5210 in a ULONGEST variable. */
5212 mask = (mask << address_size) - 1;
5218 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
5219 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
5220 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
5221 (which may be more than *OUT_LEN due to escape characters). The
5222 total number of bytes in the output buffer will be at most
5226 remote_escape_output (const gdb_byte *buffer, int len,
5227 gdb_byte *out_buf, int *out_len,
5230 int input_index, output_index;
5233 for (input_index = 0; input_index < len; input_index++)
5235 gdb_byte b = buffer[input_index];
5237 if (b == '$' || b == '#' || b == '}')
5239 /* These must be escaped. */
5240 if (output_index + 2 > out_maxlen)
5242 out_buf[output_index++] = '}';
5243 out_buf[output_index++] = b ^ 0x20;
5247 if (output_index + 1 > out_maxlen)
5249 out_buf[output_index++] = b;
5253 *out_len = input_index;
5254 return output_index;
5257 /* Convert BUFFER, escaped data LEN bytes long, into binary data
5258 in OUT_BUF. Return the number of bytes written to OUT_BUF.
5259 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
5261 This function reverses remote_escape_output. It allows more
5262 escaped characters than that function does, in particular because
5263 '*' must be escaped to avoid the run-length encoding processing
5264 in reading packets. */
5267 remote_unescape_input (const gdb_byte *buffer, int len,
5268 gdb_byte *out_buf, int out_maxlen)
5270 int input_index, output_index;
5275 for (input_index = 0; input_index < len; input_index++)
5277 gdb_byte b = buffer[input_index];
5279 if (output_index + 1 > out_maxlen)
5281 warning (_("Received too much data from remote target;"
5282 " ignoring overflow."));
5283 return output_index;
5288 out_buf[output_index++] = b ^ 0x20;
5294 out_buf[output_index++] = b;
5298 error (_("Unmatched escape character in target response."));
5300 return output_index;
5303 /* Determine whether the remote target supports binary downloading.
5304 This is accomplished by sending a no-op memory write of zero length
5305 to the target at the specified address. It does not suffice to send
5306 the whole packet, since many stubs strip the eighth bit and
5307 subsequently compute a wrong checksum, which causes real havoc with
5310 NOTE: This can still lose if the serial line is not eight-bit
5311 clean. In cases like this, the user should clear "remote
5315 check_binary_download (CORE_ADDR addr)
5317 struct remote_state *rs = get_remote_state ();
5319 switch (remote_protocol_packets[PACKET_X].support)
5321 case PACKET_DISABLE:
5325 case PACKET_SUPPORT_UNKNOWN:
5331 p += hexnumstr (p, (ULONGEST) addr);
5333 p += hexnumstr (p, (ULONGEST) 0);
5337 putpkt_binary (rs->buf, (int) (p - rs->buf));
5338 getpkt (&rs->buf, &rs->buf_size, 0);
5340 if (rs->buf[0] == '\0')
5343 fprintf_unfiltered (gdb_stdlog,
5344 "binary downloading NOT suppported by target\n");
5345 remote_protocol_packets[PACKET_X].support = PACKET_DISABLE;
5350 fprintf_unfiltered (gdb_stdlog,
5351 "binary downloading suppported by target\n");
5352 remote_protocol_packets[PACKET_X].support = PACKET_ENABLE;
5359 /* Write memory data directly to the remote machine.
5360 This does not inform the data cache; the data cache uses this.
5361 HEADER is the starting part of the packet.
5362 MEMADDR is the address in the remote memory space.
5363 MYADDR is the address of the buffer in our space.
5364 LEN is the number of bytes.
5365 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
5366 should send data as binary ('X'), or hex-encoded ('M').
5368 The function creates packet of the form
5369 <HEADER><ADDRESS>,<LENGTH>:<DATA>
5371 where encoding of <DATA> is termined by PACKET_FORMAT.
5373 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
5376 Returns the number of bytes transferred, or 0 (setting errno) for
5377 error. Only transfer a single packet. */
5380 remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
5381 const gdb_byte *myaddr, int len,
5382 char packet_format, int use_length)
5384 struct remote_state *rs = get_remote_state ();
5394 if (packet_format != 'X' && packet_format != 'M')
5395 internal_error (__FILE__, __LINE__,
5396 "remote_write_bytes_aux: bad packet format");
5401 payload_size = get_memory_write_packet_size ();
5403 /* The packet buffer will be large enough for the payload;
5404 get_memory_packet_size ensures this. */
5407 /* Compute the size of the actual payload by subtracting out the
5408 packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
5410 payload_size -= strlen ("$,:#NN");
5412 /* The comma won't be used. */
5414 header_length = strlen (header);
5415 payload_size -= header_length;
5416 payload_size -= hexnumlen (memaddr);
5418 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
5420 strcat (rs->buf, header);
5421 p = rs->buf + strlen (header);
5423 /* Compute a best guess of the number of bytes actually transfered. */
5424 if (packet_format == 'X')
5426 /* Best guess at number of bytes that will fit. */
5427 todo = min (len, payload_size);
5429 payload_size -= hexnumlen (todo);
5430 todo = min (todo, payload_size);
5434 /* Num bytes that will fit. */
5435 todo = min (len, payload_size / 2);
5437 payload_size -= hexnumlen (todo);
5438 todo = min (todo, payload_size / 2);
5442 internal_error (__FILE__, __LINE__,
5443 _("minumum packet size too small to write data"));
5445 /* If we already need another packet, then try to align the end
5446 of this packet to a useful boundary. */
5447 if (todo > 2 * REMOTE_ALIGN_WRITES && todo < len)
5448 todo = ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr;
5450 /* Append "<memaddr>". */
5451 memaddr = remote_address_masked (memaddr);
5452 p += hexnumstr (p, (ULONGEST) memaddr);
5459 /* Append <len>. Retain the location/size of <len>. It may need to
5460 be adjusted once the packet body has been created. */
5462 plenlen = hexnumstr (p, (ULONGEST) todo);
5470 /* Append the packet body. */
5471 if (packet_format == 'X')
5473 /* Binary mode. Send target system values byte by byte, in
5474 increasing byte addresses. Only escape certain critical
5476 payload_length = remote_escape_output (myaddr, todo, p, &nr_bytes,
5479 /* If not all TODO bytes fit, then we'll need another packet. Make
5480 a second try to keep the end of the packet aligned. Don't do
5481 this if the packet is tiny. */
5482 if (nr_bytes < todo && nr_bytes > 2 * REMOTE_ALIGN_WRITES)
5486 new_nr_bytes = (((memaddr + nr_bytes) & ~(REMOTE_ALIGN_WRITES - 1))
5488 if (new_nr_bytes != nr_bytes)
5489 payload_length = remote_escape_output (myaddr, new_nr_bytes,
5494 p += payload_length;
5495 if (use_length && nr_bytes < todo)
5497 /* Escape chars have filled up the buffer prematurely,
5498 and we have actually sent fewer bytes than planned.
5499 Fix-up the length field of the packet. Use the same
5500 number of characters as before. */
5501 plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen);
5502 *plen = ':'; /* overwrite \0 from hexnumnstr() */
5507 /* Normal mode: Send target system values byte by byte, in
5508 increasing byte addresses. Each byte is encoded as a two hex
5510 nr_bytes = bin2hex (myaddr, p, todo);
5514 putpkt_binary (rs->buf, (int) (p - rs->buf));
5515 getpkt (&rs->buf, &rs->buf_size, 0);
5517 if (rs->buf[0] == 'E')
5519 /* There is no correspondance between what the remote protocol
5520 uses for errors and errno codes. We would like a cleaner way
5521 of representing errors (big enough to include errno codes,
5522 bfd_error codes, and others). But for now just return EIO. */
5527 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
5528 fewer bytes than we'd planned. */
5532 /* Write memory data directly to the remote machine.
5533 This does not inform the data cache; the data cache uses this.
5534 MEMADDR is the address in the remote memory space.
5535 MYADDR is the address of the buffer in our space.
5536 LEN is the number of bytes.
5538 Returns number of bytes transferred, or 0 (setting errno) for
5539 error. Only transfer a single packet. */
5542 remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
5544 char *packet_format = 0;
5546 /* Check whether the target supports binary download. */
5547 check_binary_download (memaddr);
5549 switch (remote_protocol_packets[PACKET_X].support)
5552 packet_format = "X";
5554 case PACKET_DISABLE:
5555 packet_format = "M";
5557 case PACKET_SUPPORT_UNKNOWN:
5558 internal_error (__FILE__, __LINE__,
5559 _("remote_write_bytes: bad internal state"));
5561 internal_error (__FILE__, __LINE__, _("bad switch"));
5564 return remote_write_bytes_aux (packet_format,
5565 memaddr, myaddr, len, packet_format[0], 1);
5568 /* Read memory data directly from the remote machine.
5569 This does not use the data cache; the data cache uses this.
5570 MEMADDR is the address in the remote memory space.
5571 MYADDR is the address of the buffer in our space.
5572 LEN is the number of bytes.
5574 Returns number of bytes transferred, or 0 for error. */
5576 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
5577 remote targets) shouldn't attempt to read the entire buffer.
5578 Instead it should read a single packet worth of data and then
5579 return the byte size of that packet to the caller. The caller (its
5580 caller and its callers caller ;-) already contains code for
5581 handling partial reads. */
5584 remote_read_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
5586 struct remote_state *rs = get_remote_state ();
5587 int max_buf_size; /* Max size of packet output buffer. */
5593 max_buf_size = get_memory_read_packet_size ();
5594 /* The packet buffer will be large enough for the payload;
5595 get_memory_packet_size ensures this. */
5604 todo = min (len, max_buf_size / 2); /* num bytes that will fit */
5606 /* construct "m"<memaddr>","<len>" */
5607 /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */
5608 memaddr = remote_address_masked (memaddr);
5611 p += hexnumstr (p, (ULONGEST) memaddr);
5613 p += hexnumstr (p, (ULONGEST) todo);
5617 getpkt (&rs->buf, &rs->buf_size, 0);
5619 if (rs->buf[0] == 'E'
5620 && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2])
5621 && rs->buf[3] == '\0')
5623 /* There is no correspondance between what the remote
5624 protocol uses for errors and errno codes. We would like
5625 a cleaner way of representing errors (big enough to
5626 include errno codes, bfd_error codes, and others). But
5627 for now just return EIO. */
5632 /* Reply describes memory byte by byte,
5633 each byte encoded as two hex characters. */
5636 if ((i = hex2bin (p, myaddr, todo)) < todo)
5638 /* Reply is short. This means that we were able to read
5639 only part of what we wanted to. */
5640 return i + (origlen - len);
5650 /* Remote notification handler. */
5653 handle_notification (char *buf, size_t length)
5655 if (strncmp (buf, "Stop:", 5) == 0)
5657 if (pending_stop_reply)
5658 /* We've already parsed the in-flight stop-reply, but the stub
5659 for some reason thought we didn't, possibly due to timeout
5660 on its side. Just ignore it. */
5664 struct cleanup *old_chain;
5665 struct stop_reply *reply = stop_reply_xmalloc ();
5666 old_chain = make_cleanup (do_stop_reply_xfree, reply);
5668 remote_parse_stop_reply (buf + 5, reply);
5670 discard_cleanups (old_chain);
5672 /* Be careful to only set it after parsing, since an error
5673 may be thrown then. */
5674 pending_stop_reply = reply;
5676 /* Notify the event loop there's a stop reply to acknowledge
5677 and that there may be more events to fetch. */
5678 mark_async_event_handler (remote_async_get_pending_events_token);
5682 /* We ignore notifications we don't recognize, for compatibility
5683 with newer stubs. */
5688 /* Read or write LEN bytes from inferior memory at MEMADDR,
5689 transferring to or from debugger address BUFFER. Write to inferior
5690 if SHOULD_WRITE is nonzero. Returns length of data written or
5691 read; 0 for error. TARGET is unused. */
5694 remote_xfer_memory (CORE_ADDR mem_addr, gdb_byte *buffer, int mem_len,
5695 int should_write, struct mem_attrib *attrib,
5696 struct target_ops *target)
5700 set_general_thread (inferior_ptid);
5703 res = remote_write_bytes (mem_addr, buffer, mem_len);
5705 res = remote_read_bytes (mem_addr, buffer, mem_len);
5710 /* Sends a packet with content determined by the printf format string
5711 FORMAT and the remaining arguments, then gets the reply. Returns
5712 whether the packet was a success, a failure, or unknown. */
5715 remote_send_printf (const char *format, ...)
5717 struct remote_state *rs = get_remote_state ();
5718 int max_size = get_remote_packet_size ();
5721 va_start (ap, format);
5724 if (vsnprintf (rs->buf, max_size, format, ap) >= max_size)
5725 internal_error (__FILE__, __LINE__, "Too long remote packet.");
5727 if (putpkt (rs->buf) < 0)
5728 error (_("Communication problem with target."));
5731 getpkt (&rs->buf, &rs->buf_size, 0);
5733 return packet_check_result (rs->buf);
5737 restore_remote_timeout (void *p)
5739 int value = *(int *)p;
5740 remote_timeout = value;
5743 /* Flash writing can take quite some time. We'll set
5744 effectively infinite timeout for flash operations.
5745 In future, we'll need to decide on a better approach. */
5746 static const int remote_flash_timeout = 1000;
5749 remote_flash_erase (struct target_ops *ops,
5750 ULONGEST address, LONGEST length)
5752 int saved_remote_timeout = remote_timeout;
5753 enum packet_result ret;
5755 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
5756 &saved_remote_timeout);
5757 remote_timeout = remote_flash_timeout;
5759 ret = remote_send_printf ("vFlashErase:%s,%s",
5764 case PACKET_UNKNOWN:
5765 error (_("Remote target does not support flash erase"));
5767 error (_("Error erasing flash with vFlashErase packet"));
5772 do_cleanups (back_to);
5776 remote_flash_write (struct target_ops *ops,
5777 ULONGEST address, LONGEST length,
5778 const gdb_byte *data)
5780 int saved_remote_timeout = remote_timeout;
5782 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
5783 &saved_remote_timeout);
5785 remote_timeout = remote_flash_timeout;
5786 ret = remote_write_bytes_aux ("vFlashWrite:", address, data, length, 'X', 0);
5787 do_cleanups (back_to);
5793 remote_flash_done (struct target_ops *ops)
5795 int saved_remote_timeout = remote_timeout;
5797 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
5798 &saved_remote_timeout);
5800 remote_timeout = remote_flash_timeout;
5801 ret = remote_send_printf ("vFlashDone");
5802 do_cleanups (back_to);
5806 case PACKET_UNKNOWN:
5807 error (_("Remote target does not support vFlashDone"));
5809 error (_("Error finishing flash operation"));
5816 remote_files_info (struct target_ops *ignore)
5818 puts_filtered ("Debugging a target over a serial line.\n");
5821 /* Stuff for dealing with the packets which are part of this protocol.
5822 See comment at top of file for details. */
5824 /* Read a single character from the remote end. */
5827 readchar (int timeout)
5831 ch = serial_readchar (remote_desc, timeout);
5836 switch ((enum serial_rc) ch)
5840 error (_("Remote connection closed"));
5843 perror_with_name (_("Remote communication error"));
5845 case SERIAL_TIMEOUT:
5851 /* Send the command in *BUF to the remote machine, and read the reply
5852 into *BUF. Report an error if we get an error reply. Resize
5853 *BUF using xrealloc if necessary to hold the result, and update
5857 remote_send (char **buf,
5861 getpkt (buf, sizeof_buf, 0);
5863 if ((*buf)[0] == 'E')
5864 error (_("Remote failure reply: %s"), *buf);
5867 /* Return a pointer to an xmalloc'ed string representing an escaped
5868 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
5869 etc. The caller is responsible for releasing the returned
5873 escape_buffer (const char *buf, int n)
5875 struct cleanup *old_chain;
5876 struct ui_file *stb;
5880 stb = mem_fileopen ();
5881 old_chain = make_cleanup_ui_file_delete (stb);
5883 fputstrn_unfiltered (buf, n, 0, stb);
5884 str = ui_file_xstrdup (stb, &length);
5885 do_cleanups (old_chain);
5889 /* Display a null-terminated packet on stdout, for debugging, using C
5893 print_packet (char *buf)
5895 puts_filtered ("\"");
5896 fputstr_filtered (buf, '"', gdb_stdout);
5897 puts_filtered ("\"");
5903 return putpkt_binary (buf, strlen (buf));
5906 /* Send a packet to the remote machine, with error checking. The data
5907 of the packet is in BUF. The string in BUF can be at most
5908 get_remote_packet_size () - 5 to account for the $, # and checksum,
5909 and for a possible /0 if we are debugging (remote_debug) and want
5910 to print the sent packet as a string. */
5913 putpkt_binary (char *buf, int cnt)
5915 struct remote_state *rs = get_remote_state ();
5917 unsigned char csum = 0;
5918 char *buf2 = alloca (cnt + 6);
5924 /* Catch cases like trying to read memory or listing threads while
5925 we're waiting for a stop reply. The remote server wouldn't be
5926 ready to handle this request, so we'd hang and timeout. We don't
5927 have to worry about this in synchronous mode, because in that
5928 case it's not possible to issue a command while the target is
5929 running. This is not a problem in non-stop mode, because in that
5930 case, the stub is always ready to process serial input. */
5931 if (!non_stop && target_can_async_p () && rs->waiting_for_stop_reply)
5932 error (_("Cannot execute this command while the target is running."));
5934 /* We're sending out a new packet. Make sure we don't look at a
5935 stale cached response. */
5936 rs->cached_wait_status = 0;
5938 /* Copy the packet into buffer BUF2, encapsulating it
5939 and giving it a checksum. */
5944 for (i = 0; i < cnt; i++)
5950 *p++ = tohex ((csum >> 4) & 0xf);
5951 *p++ = tohex (csum & 0xf);
5953 /* Send it over and over until we get a positive ack. */
5957 int started_error_output = 0;
5961 struct cleanup *old_chain;
5965 str = escape_buffer (buf2, p - buf2);
5966 old_chain = make_cleanup (xfree, str);
5967 fprintf_unfiltered (gdb_stdlog, "Sending packet: %s...", str);
5968 gdb_flush (gdb_stdlog);
5969 do_cleanups (old_chain);
5971 if (serial_write (remote_desc, buf2, p - buf2))
5972 perror_with_name (_("putpkt: write failed"));
5974 /* If this is a no acks version of the remote protocol, send the
5975 packet and move on. */
5979 /* Read until either a timeout occurs (-2) or '+' is read.
5980 Handle any notification that arrives in the mean time. */
5983 ch = readchar (remote_timeout);
5991 case SERIAL_TIMEOUT:
5994 if (started_error_output)
5996 putchar_unfiltered ('\n');
5997 started_error_output = 0;
6006 fprintf_unfiltered (gdb_stdlog, "Ack\n");
6010 fprintf_unfiltered (gdb_stdlog, "Nak\n");
6011 case SERIAL_TIMEOUT:
6015 break; /* Retransmit buffer. */
6019 fprintf_unfiltered (gdb_stdlog,
6020 "Packet instead of Ack, ignoring it\n");
6021 /* It's probably an old response sent because an ACK
6022 was lost. Gobble up the packet and ack it so it
6023 doesn't get retransmitted when we resend this
6026 serial_write (remote_desc, "+", 1);
6027 continue; /* Now, go look for +. */
6034 /* If we got a notification, handle it, and go back to looking
6036 /* We've found the start of a notification. Now
6037 collect the data. */
6038 val = read_frame (&rs->buf, &rs->buf_size);
6043 struct cleanup *old_chain;
6046 str = escape_buffer (rs->buf, val);
6047 old_chain = make_cleanup (xfree, str);
6048 fprintf_unfiltered (gdb_stdlog,
6049 " Notification received: %s\n",
6051 do_cleanups (old_chain);
6053 handle_notification (rs->buf, val);
6054 /* We're in sync now, rewait for the ack. */
6061 if (!started_error_output)
6063 started_error_output = 1;
6064 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
6066 fputc_unfiltered (ch & 0177, gdb_stdlog);
6067 fprintf_unfiltered (gdb_stdlog, "%s", rs->buf);
6076 if (!started_error_output)
6078 started_error_output = 1;
6079 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
6081 fputc_unfiltered (ch & 0177, gdb_stdlog);
6085 break; /* Here to retransmit. */
6089 /* This is wrong. If doing a long backtrace, the user should be
6090 able to get out next time we call QUIT, without anything as
6091 violent as interrupt_query. If we want to provide a way out of
6092 here without getting to the next QUIT, it should be based on
6093 hitting ^C twice as in remote_wait. */
6104 /* Come here after finding the start of a frame when we expected an
6105 ack. Do our best to discard the rest of this packet. */
6114 c = readchar (remote_timeout);
6117 case SERIAL_TIMEOUT:
6118 /* Nothing we can do. */
6121 /* Discard the two bytes of checksum and stop. */
6122 c = readchar (remote_timeout);
6124 c = readchar (remote_timeout);
6127 case '*': /* Run length encoding. */
6128 /* Discard the repeat count. */
6129 c = readchar (remote_timeout);
6134 /* A regular character. */
6140 /* Come here after finding the start of the frame. Collect the rest
6141 into *BUF, verifying the checksum, length, and handling run-length
6142 compression. NUL terminate the buffer. If there is not enough room,
6143 expand *BUF using xrealloc.
6145 Returns -1 on error, number of characters in buffer (ignoring the
6146 trailing NULL) on success. (could be extended to return one of the
6147 SERIAL status indications). */
6150 read_frame (char **buf_p,
6157 struct remote_state *rs = get_remote_state ();
6164 c = readchar (remote_timeout);
6167 case SERIAL_TIMEOUT:
6169 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
6173 fputs_filtered ("Saw new packet start in middle of old one\n",
6175 return -1; /* Start a new packet, count retries. */
6178 unsigned char pktcsum;
6184 check_0 = readchar (remote_timeout);
6186 check_1 = readchar (remote_timeout);
6188 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
6191 fputs_filtered ("Timeout in checksum, retrying\n",
6195 else if (check_0 < 0 || check_1 < 0)
6198 fputs_filtered ("Communication error in checksum\n",
6203 /* Don't recompute the checksum; with no ack packets we
6204 don't have any way to indicate a packet retransmission
6209 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
6210 if (csum == pktcsum)
6215 struct cleanup *old_chain;
6218 str = escape_buffer (buf, bc);
6219 old_chain = make_cleanup (xfree, str);
6220 fprintf_unfiltered (gdb_stdlog,
6222 Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n",
6223 pktcsum, csum, str);
6224 do_cleanups (old_chain);
6226 /* Number of characters in buffer ignoring trailing
6230 case '*': /* Run length encoding. */
6235 c = readchar (remote_timeout);
6237 repeat = c - ' ' + 3; /* Compute repeat count. */
6239 /* The character before ``*'' is repeated. */
6241 if (repeat > 0 && repeat <= 255 && bc > 0)
6243 if (bc + repeat - 1 >= *sizeof_buf - 1)
6245 /* Make some more room in the buffer. */
6246 *sizeof_buf += repeat;
6247 *buf_p = xrealloc (*buf_p, *sizeof_buf);
6251 memset (&buf[bc], buf[bc - 1], repeat);
6257 printf_filtered (_("Invalid run length encoding: %s\n"), buf);
6261 if (bc >= *sizeof_buf - 1)
6263 /* Make some more room in the buffer. */
6265 *buf_p = xrealloc (*buf_p, *sizeof_buf);
6276 /* Read a packet from the remote machine, with error checking, and
6277 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6278 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6279 rather than timing out; this is used (in synchronous mode) to wait
6280 for a target that is is executing user code to stop. */
6281 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
6282 don't have to change all the calls to getpkt to deal with the
6283 return value, because at the moment I don't know what the right
6284 thing to do it for those. */
6292 timed_out = getpkt_sane (buf, sizeof_buf, forever);
6296 /* Read a packet from the remote machine, with error checking, and
6297 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6298 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6299 rather than timing out; this is used (in synchronous mode) to wait
6300 for a target that is is executing user code to stop. If FOREVER ==
6301 0, this function is allowed to time out gracefully and return an
6302 indication of this to the caller. Otherwise return the number of
6303 bytes read. If EXPECTING_NOTIF, consider receiving a notification
6304 enough reason to return to the caller. */
6307 getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf, int forever,
6308 int expecting_notif)
6310 struct remote_state *rs = get_remote_state ();
6316 /* We're reading a new response. Make sure we don't look at a
6317 previously cached response. */
6318 rs->cached_wait_status = 0;
6320 strcpy (*buf, "timeout");
6323 timeout = watchdog > 0 ? watchdog : -1;
6324 else if (expecting_notif)
6325 timeout = 0; /* There should already be a char in the buffer. If
6328 timeout = remote_timeout;
6332 /* Process any number of notifications, and then return when
6336 /* If we get a timeout or bad checksm, retry up to MAX_TRIES
6338 for (tries = 1; tries <= MAX_TRIES; tries++)
6340 /* This can loop forever if the remote side sends us
6341 characters continuously, but if it pauses, we'll get
6342 SERIAL_TIMEOUT from readchar because of timeout. Then
6343 we'll count that as a retry.
6345 Note that even when forever is set, we will only wait
6346 forever prior to the start of a packet. After that, we
6347 expect characters to arrive at a brisk pace. They should
6348 show up within remote_timeout intervals. */
6350 c = readchar (timeout);
6351 while (c != SERIAL_TIMEOUT && c != '$' && c != '%');
6353 if (c == SERIAL_TIMEOUT)
6355 if (expecting_notif)
6356 return -1; /* Don't complain, it's normal to not get
6357 anything in this case. */
6359 if (forever) /* Watchdog went off? Kill the target. */
6363 error (_("Watchdog timeout has expired. Target detached."));
6366 fputs_filtered ("Timed out.\n", gdb_stdlog);
6370 /* We've found the start of a packet or notification.
6371 Now collect the data. */
6372 val = read_frame (buf, sizeof_buf);
6377 serial_write (remote_desc, "-", 1);
6380 if (tries > MAX_TRIES)
6382 /* We have tried hard enough, and just can't receive the
6383 packet/notification. Give up. */
6384 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
6386 /* Skip the ack char if we're in no-ack mode. */
6387 if (!rs->noack_mode)
6388 serial_write (remote_desc, "+", 1);
6392 /* If we got an ordinary packet, return that to our caller. */
6397 struct cleanup *old_chain;
6400 str = escape_buffer (*buf, val);
6401 old_chain = make_cleanup (xfree, str);
6402 fprintf_unfiltered (gdb_stdlog, "Packet received: %s\n", str);
6403 do_cleanups (old_chain);
6406 /* Skip the ack char if we're in no-ack mode. */
6407 if (!rs->noack_mode)
6408 serial_write (remote_desc, "+", 1);
6412 /* If we got a notification, handle it, and go back to looking
6416 gdb_assert (c == '%');
6420 struct cleanup *old_chain;
6423 str = escape_buffer (*buf, val);
6424 old_chain = make_cleanup (xfree, str);
6425 fprintf_unfiltered (gdb_stdlog,
6426 " Notification received: %s\n",
6428 do_cleanups (old_chain);
6431 handle_notification (*buf, val);
6433 /* Notifications require no acknowledgement. */
6435 if (expecting_notif)
6442 getpkt_sane (char **buf, long *sizeof_buf, int forever)
6444 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 0);
6448 getpkt_or_notif_sane (char **buf, long *sizeof_buf, int forever)
6450 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 1);
6457 /* Use catch_errors so the user can quit from gdb even when we
6458 aren't on speaking terms with the remote system. */
6459 catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
6461 /* Don't wait for it to die. I'm not really sure it matters whether
6462 we do or not. For the existing stubs, kill is a noop. */
6463 target_mourn_inferior ();
6467 remote_vkill (int pid, struct remote_state *rs)
6469 if (remote_protocol_packets[PACKET_vKill].support == PACKET_DISABLE)
6472 /* Tell the remote target to detach. */
6473 sprintf (rs->buf, "vKill;%x", pid);
6475 getpkt (&rs->buf, &rs->buf_size, 0);
6477 if (packet_ok (rs->buf,
6478 &remote_protocol_packets[PACKET_vKill]) == PACKET_OK)
6480 else if (remote_protocol_packets[PACKET_vKill].support == PACKET_DISABLE)
6487 extended_remote_kill (void)
6490 int pid = ptid_get_pid (inferior_ptid);
6491 struct remote_state *rs = get_remote_state ();
6493 res = remote_vkill (pid, rs);
6494 if (res == -1 && !remote_multi_process_p (rs))
6496 /* Don't try 'k' on a multi-process aware stub -- it has no way
6497 to specify the pid. */
6501 getpkt (&rs->buf, &rs->buf_size, 0);
6502 if (rs->buf[0] != 'O' || rs->buf[0] != 'K')
6505 /* Don't wait for it to die. I'm not really sure it matters whether
6506 we do or not. For the existing stubs, kill is a noop. */
6512 error (_("Can't kill process"));
6514 delete_inferior (pid);
6515 target_mourn_inferior ();
6519 remote_mourn (struct target_ops *ops)
6521 remote_mourn_1 (ops);
6524 /* Worker function for remote_mourn. */
6526 remote_mourn_1 (struct target_ops *target)
6528 unpush_target (target);
6530 /* remote_close takes care of cleaning up. */
6534 select_new_thread_callback (struct thread_info *th, void* data)
6536 if (!is_exited (th->ptid))
6538 switch_to_thread (th->ptid);
6539 printf_filtered (_("[Switching to %s]\n"),
6540 target_pid_to_str (inferior_ptid));
6547 extended_remote_mourn_1 (struct target_ops *target)
6549 struct remote_state *rs = get_remote_state ();
6551 /* In case we got here due to an error, but we're going to stay
6553 rs->waiting_for_stop_reply = 0;
6555 /* We're no longer interested in these events. */
6556 discard_pending_stop_replies (ptid_get_pid (inferior_ptid));
6558 /* Unlike "target remote", we do not want to unpush the target; then
6559 the next time the user says "run", we won't be connected. */
6561 if (have_inferiors ())
6563 extern void nullify_last_target_wait_ptid ();
6564 /* Multi-process case. The current process has exited, but
6565 there are other processes to debug. Switch to the first
6567 iterate_over_threads (select_new_thread_callback, NULL);
6568 nullify_last_target_wait_ptid ();
6572 struct remote_state *rs = get_remote_state ();
6574 /* Call common code to mark the inferior as not running. */
6575 generic_mourn_inferior ();
6576 if (!remote_multi_process_p (rs))
6578 /* Check whether the target is running now - some remote stubs
6579 automatically restart after kill. */
6581 getpkt (&rs->buf, &rs->buf_size, 0);
6583 if (rs->buf[0] == 'S' || rs->buf[0] == 'T')
6585 /* Assume that the target has been restarted. Set inferior_ptid
6586 so that bits of core GDB realizes there's something here, e.g.,
6587 so that the user can say "kill" again. */
6588 inferior_ptid = magic_null_ptid;
6592 /* Mark this (still pushed) target as not executable until we
6594 target_mark_exited (target);
6598 /* Always remove execution if this was the last process. */
6599 target_mark_exited (target);
6604 extended_remote_mourn (struct target_ops *ops)
6606 extended_remote_mourn_1 (ops);
6610 extended_remote_run (char *args)
6612 struct remote_state *rs = get_remote_state ();
6616 /* If the user has disabled vRun support, or we have detected that
6617 support is not available, do not try it. */
6618 if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE)
6621 strcpy (rs->buf, "vRun;");
6622 len = strlen (rs->buf);
6624 if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ())
6625 error (_("Remote file name too long for run packet"));
6626 len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len, 0);
6628 gdb_assert (args != NULL);
6631 struct cleanup *back_to;
6635 argv = gdb_buildargv (args);
6636 back_to = make_cleanup ((void (*) (void *)) freeargv, argv);
6637 for (i = 0; argv[i] != NULL; i++)
6639 if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ())
6640 error (_("Argument list too long for run packet"));
6641 rs->buf[len++] = ';';
6642 len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len, 0);
6644 do_cleanups (back_to);
6647 rs->buf[len++] = '\0';
6650 getpkt (&rs->buf, &rs->buf_size, 0);
6652 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]) == PACKET_OK)
6654 /* We have a wait response; we don't need it, though. All is well. */
6657 else if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE)
6658 /* It wasn't disabled before, but it is now. */
6662 if (remote_exec_file[0] == '\0')
6663 error (_("Running the default executable on the remote target failed; "
6664 "try \"set remote exec-file\"?"));
6666 error (_("Running \"%s\" on the remote target failed"),
6671 /* In the extended protocol we want to be able to do things like
6672 "run" and have them basically work as expected. So we need
6673 a special create_inferior function. We support changing the
6674 executable file and the command line arguments, but not the
6678 extended_remote_create_inferior_1 (char *exec_file, char *args,
6679 char **env, int from_tty)
6681 /* If running asynchronously, register the target file descriptor
6682 with the event loop. */
6683 if (target_can_async_p ())
6684 target_async (inferior_event_handler, 0);
6686 /* Now restart the remote server. */
6687 if (extended_remote_run (args) == -1)
6689 /* vRun was not supported. Fail if we need it to do what the
6691 if (remote_exec_file[0])
6692 error (_("Remote target does not support \"set remote exec-file\""));
6694 error (_("Remote target does not support \"set args\" or run <ARGS>"));
6696 /* Fall back to "R". */
6697 extended_remote_restart ();
6700 /* Clean up from the last time we ran, before we mark the target
6701 running again. This will mark breakpoints uninserted, and
6702 get_offsets may insert breakpoints. */
6703 init_thread_list ();
6704 init_wait_for_inferior ();
6706 /* Now mark the inferior as running before we do anything else. */
6707 inferior_ptid = magic_null_ptid;
6709 /* Now, if we have thread information, update inferior_ptid. */
6710 inferior_ptid = remote_current_thread (inferior_ptid);
6712 add_inferior (ptid_get_pid (inferior_ptid));
6713 add_thread_silent (inferior_ptid);
6715 target_mark_running (&extended_remote_ops);
6717 /* Get updated offsets, if the stub uses qOffsets. */
6722 extended_remote_create_inferior (struct target_ops *ops,
6723 char *exec_file, char *args,
6724 char **env, int from_tty)
6726 extended_remote_create_inferior_1 (exec_file, args, env, from_tty);
6730 /* Insert a breakpoint. On targets that have software breakpoint
6731 support, we ask the remote target to do the work; on targets
6732 which don't, we insert a traditional memory breakpoint. */
6735 remote_insert_breakpoint (struct bp_target_info *bp_tgt)
6737 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
6738 If it succeeds, then set the support to PACKET_ENABLE. If it
6739 fails, and the user has explicitly requested the Z support then
6740 report an error, otherwise, mark it disabled and go on. */
6742 if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE)
6744 CORE_ADDR addr = bp_tgt->placed_address;
6745 struct remote_state *rs;
6749 gdbarch_breakpoint_from_pc (target_gdbarch, &addr, &bpsize);
6751 rs = get_remote_state ();
6757 addr = (ULONGEST) remote_address_masked (addr);
6758 p += hexnumstr (p, addr);
6759 sprintf (p, ",%d", bpsize);
6762 getpkt (&rs->buf, &rs->buf_size, 0);
6764 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0]))
6769 bp_tgt->placed_address = addr;
6770 bp_tgt->placed_size = bpsize;
6772 case PACKET_UNKNOWN:
6777 return memory_insert_breakpoint (bp_tgt);
6781 remote_remove_breakpoint (struct bp_target_info *bp_tgt)
6783 CORE_ADDR addr = bp_tgt->placed_address;
6784 struct remote_state *rs = get_remote_state ();
6787 if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE)
6795 addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
6796 p += hexnumstr (p, addr);
6797 sprintf (p, ",%d", bp_tgt->placed_size);
6800 getpkt (&rs->buf, &rs->buf_size, 0);
6802 return (rs->buf[0] == 'E');
6805 return memory_remove_breakpoint (bp_tgt);
6809 watchpoint_to_Z_packet (int type)
6814 return Z_PACKET_WRITE_WP;
6817 return Z_PACKET_READ_WP;
6820 return Z_PACKET_ACCESS_WP;
6823 internal_error (__FILE__, __LINE__,
6824 _("hw_bp_to_z: bad watchpoint type %d"), type);
6829 remote_insert_watchpoint (CORE_ADDR addr, int len, int type)
6831 struct remote_state *rs = get_remote_state ();
6833 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
6835 if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE)
6838 sprintf (rs->buf, "Z%x,", packet);
6839 p = strchr (rs->buf, '\0');
6840 addr = remote_address_masked (addr);
6841 p += hexnumstr (p, (ULONGEST) addr);
6842 sprintf (p, ",%x", len);
6845 getpkt (&rs->buf, &rs->buf_size, 0);
6847 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
6850 case PACKET_UNKNOWN:
6855 internal_error (__FILE__, __LINE__,
6856 _("remote_insert_watchpoint: reached end of function"));
6861 remote_remove_watchpoint (CORE_ADDR addr, int len, int type)
6863 struct remote_state *rs = get_remote_state ();
6865 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
6867 if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE)
6870 sprintf (rs->buf, "z%x,", packet);
6871 p = strchr (rs->buf, '\0');
6872 addr = remote_address_masked (addr);
6873 p += hexnumstr (p, (ULONGEST) addr);
6874 sprintf (p, ",%x", len);
6876 getpkt (&rs->buf, &rs->buf_size, 0);
6878 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
6881 case PACKET_UNKNOWN:
6886 internal_error (__FILE__, __LINE__,
6887 _("remote_remove_watchpoint: reached end of function"));
6891 int remote_hw_watchpoint_limit = -1;
6892 int remote_hw_breakpoint_limit = -1;
6895 remote_check_watch_resources (int type, int cnt, int ot)
6897 if (type == bp_hardware_breakpoint)
6899 if (remote_hw_breakpoint_limit == 0)
6901 else if (remote_hw_breakpoint_limit < 0)
6903 else if (cnt <= remote_hw_breakpoint_limit)
6908 if (remote_hw_watchpoint_limit == 0)
6910 else if (remote_hw_watchpoint_limit < 0)
6914 else if (cnt <= remote_hw_watchpoint_limit)
6921 remote_stopped_by_watchpoint (void)
6923 return remote_stopped_by_watchpoint_p;
6927 remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
6930 if (remote_stopped_by_watchpoint ())
6932 *addr_p = remote_watch_data_address;
6941 remote_insert_hw_breakpoint (struct bp_target_info *bp_tgt)
6944 struct remote_state *rs;
6947 /* The length field should be set to the size of a breakpoint
6948 instruction, even though we aren't inserting one ourselves. */
6950 gdbarch_breakpoint_from_pc
6951 (target_gdbarch, &bp_tgt->placed_address, &bp_tgt->placed_size);
6953 if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
6956 rs = get_remote_state ();
6963 addr = remote_address_masked (bp_tgt->placed_address);
6964 p += hexnumstr (p, (ULONGEST) addr);
6965 sprintf (p, ",%x", bp_tgt->placed_size);
6968 getpkt (&rs->buf, &rs->buf_size, 0);
6970 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
6973 case PACKET_UNKNOWN:
6978 internal_error (__FILE__, __LINE__,
6979 _("remote_insert_hw_breakpoint: reached end of function"));
6984 remote_remove_hw_breakpoint (struct bp_target_info *bp_tgt)
6987 struct remote_state *rs = get_remote_state ();
6990 if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
6997 addr = remote_address_masked (bp_tgt->placed_address);
6998 p += hexnumstr (p, (ULONGEST) addr);
6999 sprintf (p, ",%x", bp_tgt->placed_size);
7002 getpkt (&rs->buf, &rs->buf_size, 0);
7004 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
7007 case PACKET_UNKNOWN:
7012 internal_error (__FILE__, __LINE__,
7013 _("remote_remove_hw_breakpoint: reached end of function"));
7016 /* Table used by the crc32 function to calcuate the checksum. */
7018 static unsigned long crc32_table[256] =
7021 static unsigned long
7022 crc32 (unsigned char *buf, int len, unsigned int crc)
7024 if (!crc32_table[1])
7026 /* Initialize the CRC table and the decoding table. */
7030 for (i = 0; i < 256; i++)
7032 for (c = i << 24, j = 8; j > 0; --j)
7033 c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
7040 crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255];
7046 /* compare-sections command
7048 With no arguments, compares each loadable section in the exec bfd
7049 with the same memory range on the target, and reports mismatches.
7050 Useful for verifying the image on the target against the exec file.
7051 Depends on the target understanding the new "qCRC:" request. */
7053 /* FIXME: cagney/1999-10-26: This command should be broken down into a
7054 target method (target verify memory) and generic version of the
7055 actual command. This will allow other high-level code (especially
7056 generic_load()) to make use of this target functionality. */
7059 compare_sections_command (char *args, int from_tty)
7061 struct remote_state *rs = get_remote_state ();
7063 unsigned long host_crc, target_crc;
7064 extern bfd *exec_bfd;
7065 struct cleanup *old_chain;
7068 const char *sectname;
7075 error (_("command cannot be used without an exec file"));
7076 if (!current_target.to_shortname ||
7077 strcmp (current_target.to_shortname, "remote") != 0)
7078 error (_("command can only be used with remote target"));
7080 for (s = exec_bfd->sections; s; s = s->next)
7082 if (!(s->flags & SEC_LOAD))
7083 continue; /* skip non-loadable section */
7085 size = bfd_get_section_size (s);
7087 continue; /* skip zero-length section */
7089 sectname = bfd_get_section_name (exec_bfd, s);
7090 if (args && strcmp (args, sectname) != 0)
7091 continue; /* not the section selected by user */
7093 matched = 1; /* do this section */
7095 /* FIXME: assumes lma can fit into long. */
7096 xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx",
7097 (long) lma, (long) size);
7100 /* Be clever; compute the host_crc before waiting for target
7102 sectdata = xmalloc (size);
7103 old_chain = make_cleanup (xfree, sectdata);
7104 bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
7105 host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff);
7107 getpkt (&rs->buf, &rs->buf_size, 0);
7108 if (rs->buf[0] == 'E')
7109 error (_("target memory fault, section %s, range 0x%s -- 0x%s"),
7110 sectname, paddr (lma), paddr (lma + size));
7111 if (rs->buf[0] != 'C')
7112 error (_("remote target does not support this operation"));
7114 for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++)
7115 target_crc = target_crc * 16 + fromhex (*tmp);
7117 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
7118 sectname, paddr (lma), paddr (lma + size));
7119 if (host_crc == target_crc)
7120 printf_filtered ("matched.\n");
7123 printf_filtered ("MIS-MATCHED!\n");
7127 do_cleanups (old_chain);
7130 warning (_("One or more sections of the remote executable does not match\n\
7131 the loaded file\n"));
7132 if (args && !matched)
7133 printf_filtered (_("No loaded section named '%s'.\n"), args);
7136 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
7137 into remote target. The number of bytes written to the remote
7138 target is returned, or -1 for error. */
7141 remote_write_qxfer (struct target_ops *ops, const char *object_name,
7142 const char *annex, const gdb_byte *writebuf,
7143 ULONGEST offset, LONGEST len,
7144 struct packet_config *packet)
7149 struct remote_state *rs = get_remote_state ();
7150 int max_size = get_memory_write_packet_size ();
7152 if (packet->support == PACKET_DISABLE)
7155 /* Insert header. */
7156 i = snprintf (rs->buf, max_size,
7157 "qXfer:%s:write:%s:%s:",
7158 object_name, annex ? annex : "",
7159 phex_nz (offset, sizeof offset));
7160 max_size -= (i + 1);
7162 /* Escape as much data as fits into rs->buf. */
7163 buf_len = remote_escape_output
7164 (writebuf, len, (rs->buf + i), &max_size, max_size);
7166 if (putpkt_binary (rs->buf, i + buf_len) < 0
7167 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
7168 || packet_ok (rs->buf, packet) != PACKET_OK)
7171 unpack_varlen_hex (rs->buf, &n);
7175 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
7176 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
7177 number of bytes read is returned, or 0 for EOF, or -1 for error.
7178 The number of bytes read may be less than LEN without indicating an
7179 EOF. PACKET is checked and updated to indicate whether the remote
7180 target supports this object. */
7183 remote_read_qxfer (struct target_ops *ops, const char *object_name,
7185 gdb_byte *readbuf, ULONGEST offset, LONGEST len,
7186 struct packet_config *packet)
7188 static char *finished_object;
7189 static char *finished_annex;
7190 static ULONGEST finished_offset;
7192 struct remote_state *rs = get_remote_state ();
7193 unsigned int total = 0;
7194 LONGEST i, n, packet_len;
7196 if (packet->support == PACKET_DISABLE)
7199 /* Check whether we've cached an end-of-object packet that matches
7201 if (finished_object)
7203 if (strcmp (object_name, finished_object) == 0
7204 && strcmp (annex ? annex : "", finished_annex) == 0
7205 && offset == finished_offset)
7208 /* Otherwise, we're now reading something different. Discard
7210 xfree (finished_object);
7211 xfree (finished_annex);
7212 finished_object = NULL;
7213 finished_annex = NULL;
7216 /* Request only enough to fit in a single packet. The actual data
7217 may not, since we don't know how much of it will need to be escaped;
7218 the target is free to respond with slightly less data. We subtract
7219 five to account for the response type and the protocol frame. */
7220 n = min (get_remote_packet_size () - 5, len);
7221 snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
7222 object_name, annex ? annex : "",
7223 phex_nz (offset, sizeof offset),
7224 phex_nz (n, sizeof n));
7225 i = putpkt (rs->buf);
7230 packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0);
7231 if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK)
7234 if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
7235 error (_("Unknown remote qXfer reply: %s"), rs->buf);
7237 /* 'm' means there is (or at least might be) more data after this
7238 batch. That does not make sense unless there's at least one byte
7239 of data in this reply. */
7240 if (rs->buf[0] == 'm' && packet_len == 1)
7241 error (_("Remote qXfer reply contained no data."));
7243 /* Got some data. */
7244 i = remote_unescape_input (rs->buf + 1, packet_len - 1, readbuf, n);
7246 /* 'l' is an EOF marker, possibly including a final block of data,
7247 or possibly empty. If we have the final block of a non-empty
7248 object, record this fact to bypass a subsequent partial read. */
7249 if (rs->buf[0] == 'l' && offset + i > 0)
7251 finished_object = xstrdup (object_name);
7252 finished_annex = xstrdup (annex ? annex : "");
7253 finished_offset = offset + i;
7260 remote_xfer_partial (struct target_ops *ops, enum target_object object,
7261 const char *annex, gdb_byte *readbuf,
7262 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
7264 struct remote_state *rs;
7269 set_general_thread (inferior_ptid);
7271 rs = get_remote_state ();
7273 /* Handle memory using the standard memory routines. */
7274 if (object == TARGET_OBJECT_MEMORY)
7279 /* If the remote target is connected but not running, we should
7280 pass this request down to a lower stratum (e.g. the executable
7282 if (!target_has_execution)
7285 if (writebuf != NULL)
7286 xfered = remote_write_bytes (offset, writebuf, len);
7288 xfered = remote_read_bytes (offset, readbuf, len);
7292 else if (xfered == 0 && errno == 0)
7298 /* Handle SPU memory using qxfer packets. */
7299 if (object == TARGET_OBJECT_SPU)
7302 return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len,
7303 &remote_protocol_packets
7304 [PACKET_qXfer_spu_read]);
7306 return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len,
7307 &remote_protocol_packets
7308 [PACKET_qXfer_spu_write]);
7311 /* Only handle flash writes. */
7312 if (writebuf != NULL)
7318 case TARGET_OBJECT_FLASH:
7319 xfered = remote_flash_write (ops, offset, len, writebuf);
7323 else if (xfered == 0 && errno == 0)
7333 /* Map pre-existing objects onto letters. DO NOT do this for new
7334 objects!!! Instead specify new query packets. */
7337 case TARGET_OBJECT_AVR:
7341 case TARGET_OBJECT_AUXV:
7342 gdb_assert (annex == NULL);
7343 return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len,
7344 &remote_protocol_packets[PACKET_qXfer_auxv]);
7346 case TARGET_OBJECT_AVAILABLE_FEATURES:
7347 return remote_read_qxfer
7348 (ops, "features", annex, readbuf, offset, len,
7349 &remote_protocol_packets[PACKET_qXfer_features]);
7351 case TARGET_OBJECT_LIBRARIES:
7352 return remote_read_qxfer
7353 (ops, "libraries", annex, readbuf, offset, len,
7354 &remote_protocol_packets[PACKET_qXfer_libraries]);
7356 case TARGET_OBJECT_MEMORY_MAP:
7357 gdb_assert (annex == NULL);
7358 return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len,
7359 &remote_protocol_packets[PACKET_qXfer_memory_map]);
7361 case TARGET_OBJECT_OSDATA:
7362 /* Should only get here if we're connected. */
7363 gdb_assert (remote_desc);
7364 return remote_read_qxfer
7365 (ops, "osdata", annex, readbuf, offset, len,
7366 &remote_protocol_packets[PACKET_qXfer_osdata]);
7372 /* Note: a zero OFFSET and LEN can be used to query the minimum
7374 if (offset == 0 && len == 0)
7375 return (get_remote_packet_size ());
7376 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
7377 large enough let the caller deal with it. */
7378 if (len < get_remote_packet_size ())
7380 len = get_remote_packet_size ();
7382 /* Except for querying the minimum buffer size, target must be open. */
7384 error (_("remote query is only available after target open"));
7386 gdb_assert (annex != NULL);
7387 gdb_assert (readbuf != NULL);
7393 /* We used one buffer char for the remote protocol q command and
7394 another for the query type. As the remote protocol encapsulation
7395 uses 4 chars plus one extra in case we are debugging
7396 (remote_debug), we have PBUFZIZ - 7 left to pack the query
7399 while (annex[i] && (i < (get_remote_packet_size () - 8)))
7401 /* Bad caller may have sent forbidden characters. */
7402 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
7407 gdb_assert (annex[i] == '\0');
7409 i = putpkt (rs->buf);
7413 getpkt (&rs->buf, &rs->buf_size, 0);
7414 strcpy ((char *) readbuf, rs->buf);
7416 return strlen ((char *) readbuf);
7420 remote_search_memory (struct target_ops* ops,
7421 CORE_ADDR start_addr, ULONGEST search_space_len,
7422 const gdb_byte *pattern, ULONGEST pattern_len,
7423 CORE_ADDR *found_addrp)
7425 struct remote_state *rs = get_remote_state ();
7426 int max_size = get_memory_write_packet_size ();
7427 struct packet_config *packet =
7428 &remote_protocol_packets[PACKET_qSearch_memory];
7429 /* number of packet bytes used to encode the pattern,
7430 this could be more than PATTERN_LEN due to escape characters */
7431 int escaped_pattern_len;
7432 /* amount of pattern that was encodable in the packet */
7433 int used_pattern_len;
7436 ULONGEST found_addr;
7438 /* Don't go to the target if we don't have to.
7439 This is done before checking packet->support to avoid the possibility that
7440 a success for this edge case means the facility works in general. */
7441 if (pattern_len > search_space_len)
7443 if (pattern_len == 0)
7445 *found_addrp = start_addr;
7449 /* If we already know the packet isn't supported, fall back to the simple
7450 way of searching memory. */
7452 if (packet->support == PACKET_DISABLE)
7454 /* Target doesn't provided special support, fall back and use the
7455 standard support (copy memory and do the search here). */
7456 return simple_search_memory (ops, start_addr, search_space_len,
7457 pattern, pattern_len, found_addrp);
7460 /* Insert header. */
7461 i = snprintf (rs->buf, max_size,
7462 "qSearch:memory:%s;%s;",
7463 paddr_nz (start_addr),
7464 phex_nz (search_space_len, sizeof (search_space_len)));
7465 max_size -= (i + 1);
7467 /* Escape as much data as fits into rs->buf. */
7468 escaped_pattern_len =
7469 remote_escape_output (pattern, pattern_len, (rs->buf + i),
7470 &used_pattern_len, max_size);
7472 /* Bail if the pattern is too large. */
7473 if (used_pattern_len != pattern_len)
7474 error ("Pattern is too large to transmit to remote target.");
7476 if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0
7477 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
7478 || packet_ok (rs->buf, packet) != PACKET_OK)
7480 /* The request may not have worked because the command is not
7481 supported. If so, fall back to the simple way. */
7482 if (packet->support == PACKET_DISABLE)
7484 return simple_search_memory (ops, start_addr, search_space_len,
7485 pattern, pattern_len, found_addrp);
7490 if (rs->buf[0] == '0')
7492 else if (rs->buf[0] == '1')
7495 if (rs->buf[1] != ',')
7496 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
7497 unpack_varlen_hex (rs->buf + 2, &found_addr);
7498 *found_addrp = found_addr;
7501 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
7507 remote_rcmd (char *command,
7508 struct ui_file *outbuf)
7510 struct remote_state *rs = get_remote_state ();
7514 error (_("remote rcmd is only available after target open"));
7516 /* Send a NULL command across as an empty command. */
7517 if (command == NULL)
7520 /* The query prefix. */
7521 strcpy (rs->buf, "qRcmd,");
7522 p = strchr (rs->buf, '\0');
7524 if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/) > get_remote_packet_size ())
7525 error (_("\"monitor\" command ``%s'' is too long."), command);
7527 /* Encode the actual command. */
7528 bin2hex ((gdb_byte *) command, p, 0);
7530 if (putpkt (rs->buf) < 0)
7531 error (_("Communication problem with target."));
7533 /* get/display the response */
7538 /* XXX - see also tracepoint.c:remote_get_noisy_reply(). */
7540 getpkt (&rs->buf, &rs->buf_size, 0);
7543 error (_("Target does not support this command."));
7544 if (buf[0] == 'O' && buf[1] != 'K')
7546 remote_console_output (buf + 1); /* 'O' message from stub. */
7549 if (strcmp (buf, "OK") == 0)
7551 if (strlen (buf) == 3 && buf[0] == 'E'
7552 && isdigit (buf[1]) && isdigit (buf[2]))
7554 error (_("Protocol error with Rcmd"));
7556 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
7558 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
7559 fputc_unfiltered (c, outbuf);
7565 static VEC(mem_region_s) *
7566 remote_memory_map (struct target_ops *ops)
7568 VEC(mem_region_s) *result = NULL;
7569 char *text = target_read_stralloc (¤t_target,
7570 TARGET_OBJECT_MEMORY_MAP, NULL);
7574 struct cleanup *back_to = make_cleanup (xfree, text);
7575 result = parse_memory_map (text);
7576 do_cleanups (back_to);
7583 packet_command (char *args, int from_tty)
7585 struct remote_state *rs = get_remote_state ();
7588 error (_("command can only be used with remote target"));
7591 error (_("remote-packet command requires packet text as argument"));
7593 puts_filtered ("sending: ");
7594 print_packet (args);
7595 puts_filtered ("\n");
7598 getpkt (&rs->buf, &rs->buf_size, 0);
7599 puts_filtered ("received: ");
7600 print_packet (rs->buf);
7601 puts_filtered ("\n");
7605 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
7607 static void display_thread_info (struct gdb_ext_thread_info *info);
7609 static void threadset_test_cmd (char *cmd, int tty);
7611 static void threadalive_test (char *cmd, int tty);
7613 static void threadlist_test_cmd (char *cmd, int tty);
7615 int get_and_display_threadinfo (threadref *ref);
7617 static void threadinfo_test_cmd (char *cmd, int tty);
7619 static int thread_display_step (threadref *ref, void *context);
7621 static void threadlist_update_test_cmd (char *cmd, int tty);
7623 static void init_remote_threadtests (void);
7625 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
7628 threadset_test_cmd (char *cmd, int tty)
7630 int sample_thread = SAMPLE_THREAD;
7632 printf_filtered (_("Remote threadset test\n"));
7633 set_general_thread (sample_thread);
7638 threadalive_test (char *cmd, int tty)
7640 int sample_thread = SAMPLE_THREAD;
7641 int pid = ptid_get_pid (inferior_ptid);
7642 ptid_t ptid = ptid_build (pid, 0, sample_thread);
7644 if (remote_thread_alive (ptid))
7645 printf_filtered ("PASS: Thread alive test\n");
7647 printf_filtered ("FAIL: Thread alive test\n");
7650 void output_threadid (char *title, threadref *ref);
7653 output_threadid (char *title, threadref *ref)
7657 pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
7659 printf_filtered ("%s %s\n", title, (&hexid[0]));
7663 threadlist_test_cmd (char *cmd, int tty)
7666 threadref nextthread;
7667 int done, result_count;
7668 threadref threadlist[3];
7670 printf_filtered ("Remote Threadlist test\n");
7671 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
7672 &result_count, &threadlist[0]))
7673 printf_filtered ("FAIL: threadlist test\n");
7676 threadref *scan = threadlist;
7677 threadref *limit = scan + result_count;
7679 while (scan < limit)
7680 output_threadid (" thread ", scan++);
7685 display_thread_info (struct gdb_ext_thread_info *info)
7687 output_threadid ("Threadid: ", &info->threadid);
7688 printf_filtered ("Name: %s\n ", info->shortname);
7689 printf_filtered ("State: %s\n", info->display);
7690 printf_filtered ("other: %s\n\n", info->more_display);
7694 get_and_display_threadinfo (threadref *ref)
7698 struct gdb_ext_thread_info threadinfo;
7700 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
7701 | TAG_MOREDISPLAY | TAG_DISPLAY;
7702 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
7703 display_thread_info (&threadinfo);
7708 threadinfo_test_cmd (char *cmd, int tty)
7710 int athread = SAMPLE_THREAD;
7714 int_to_threadref (&thread, athread);
7715 printf_filtered ("Remote Threadinfo test\n");
7716 if (!get_and_display_threadinfo (&thread))
7717 printf_filtered ("FAIL cannot get thread info\n");
7721 thread_display_step (threadref *ref, void *context)
7723 /* output_threadid(" threadstep ",ref); *//* simple test */
7724 return get_and_display_threadinfo (ref);
7728 threadlist_update_test_cmd (char *cmd, int tty)
7730 printf_filtered ("Remote Threadlist update test\n");
7731 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
7735 init_remote_threadtests (void)
7737 add_com ("tlist", class_obscure, threadlist_test_cmd, _("\
7738 Fetch and print the remote list of thread identifiers, one pkt only"));
7739 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
7740 _("Fetch and display info about one thread"));
7741 add_com ("tset", class_obscure, threadset_test_cmd,
7742 _("Test setting to a different thread"));
7743 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
7744 _("Iterate through updating all remote thread info"));
7745 add_com ("talive", class_obscure, threadalive_test,
7746 _(" Remote thread alive test "));
7751 /* Convert a thread ID to a string. Returns the string in a static
7755 remote_pid_to_str (ptid_t ptid)
7757 static char buf[64];
7758 struct remote_state *rs = get_remote_state ();
7760 if (ptid_equal (magic_null_ptid, ptid))
7762 xsnprintf (buf, sizeof buf, "Thread <main>");
7765 else if (remote_multi_process_p (rs)
7766 && ptid_get_tid (ptid) != 0 && ptid_get_pid (ptid) != 0)
7768 xsnprintf (buf, sizeof buf, "Thread %d.%ld",
7769 ptid_get_pid (ptid), ptid_get_tid (ptid));
7772 else if (ptid_get_tid (ptid) != 0)
7774 xsnprintf (buf, sizeof buf, "Thread %ld",
7775 ptid_get_tid (ptid));
7779 return normal_pid_to_str (ptid);
7782 /* Get the address of the thread local variable in OBJFILE which is
7783 stored at OFFSET within the thread local storage for thread PTID. */
7786 remote_get_thread_local_address (ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset)
7788 if (remote_protocol_packets[PACKET_qGetTLSAddr].support != PACKET_DISABLE)
7790 struct remote_state *rs = get_remote_state ();
7792 char *endp = rs->buf + get_remote_packet_size ();
7793 enum packet_result result;
7795 strcpy (p, "qGetTLSAddr:");
7797 p = write_ptid (p, endp, ptid);
7799 p += hexnumstr (p, offset);
7801 p += hexnumstr (p, lm);
7805 getpkt (&rs->buf, &rs->buf_size, 0);
7806 result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_qGetTLSAddr]);
7807 if (result == PACKET_OK)
7811 unpack_varlen_hex (rs->buf, &result);
7814 else if (result == PACKET_UNKNOWN)
7815 throw_error (TLS_GENERIC_ERROR,
7816 _("Remote target doesn't support qGetTLSAddr packet"));
7818 throw_error (TLS_GENERIC_ERROR,
7819 _("Remote target failed to process qGetTLSAddr request"));
7822 throw_error (TLS_GENERIC_ERROR,
7823 _("TLS not supported or disabled on this target"));
7828 /* Support for inferring a target description based on the current
7829 architecture and the size of a 'g' packet. While the 'g' packet
7830 can have any size (since optional registers can be left off the
7831 end), some sizes are easily recognizable given knowledge of the
7832 approximate architecture. */
7834 struct remote_g_packet_guess
7837 const struct target_desc *tdesc;
7839 typedef struct remote_g_packet_guess remote_g_packet_guess_s;
7840 DEF_VEC_O(remote_g_packet_guess_s);
7842 struct remote_g_packet_data
7844 VEC(remote_g_packet_guess_s) *guesses;
7847 static struct gdbarch_data *remote_g_packet_data_handle;
7850 remote_g_packet_data_init (struct obstack *obstack)
7852 return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data);
7856 register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
7857 const struct target_desc *tdesc)
7859 struct remote_g_packet_data *data
7860 = gdbarch_data (gdbarch, remote_g_packet_data_handle);
7861 struct remote_g_packet_guess new_guess, *guess;
7864 gdb_assert (tdesc != NULL);
7867 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
7869 if (guess->bytes == bytes)
7870 internal_error (__FILE__, __LINE__,
7871 "Duplicate g packet description added for size %d",
7874 new_guess.bytes = bytes;
7875 new_guess.tdesc = tdesc;
7876 VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess);
7879 /* Return 1 if remote_read_description would do anything on this target
7880 and architecture, 0 otherwise. */
7883 remote_read_description_p (struct target_ops *target)
7885 struct remote_g_packet_data *data
7886 = gdbarch_data (target_gdbarch, remote_g_packet_data_handle);
7888 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
7894 static const struct target_desc *
7895 remote_read_description (struct target_ops *target)
7897 struct remote_g_packet_data *data
7898 = gdbarch_data (target_gdbarch, remote_g_packet_data_handle);
7900 /* Do not try this during initial connection, when we do not know
7901 whether there is a running but stopped thread. */
7902 if (!target_has_execution || ptid_equal (inferior_ptid, null_ptid))
7905 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
7907 struct remote_g_packet_guess *guess;
7909 int bytes = send_g_packet ();
7912 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
7914 if (guess->bytes == bytes)
7915 return guess->tdesc;
7917 /* We discard the g packet. A minor optimization would be to
7918 hold on to it, and fill the register cache once we have selected
7919 an architecture, but it's too tricky to do safely. */
7925 /* Remote file transfer support. This is host-initiated I/O, not
7926 target-initiated; for target-initiated, see remote-fileio.c. */
7928 /* If *LEFT is at least the length of STRING, copy STRING to
7929 *BUFFER, update *BUFFER to point to the new end of the buffer, and
7930 decrease *LEFT. Otherwise raise an error. */
7933 remote_buffer_add_string (char **buffer, int *left, char *string)
7935 int len = strlen (string);
7938 error (_("Packet too long for target."));
7940 memcpy (*buffer, string, len);
7944 /* NUL-terminate the buffer as a convenience, if there is
7950 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
7951 *BUFFER, update *BUFFER to point to the new end of the buffer, and
7952 decrease *LEFT. Otherwise raise an error. */
7955 remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
7958 if (2 * len > *left)
7959 error (_("Packet too long for target."));
7961 bin2hex (bytes, *buffer, len);
7965 /* NUL-terminate the buffer as a convenience, if there is
7971 /* If *LEFT is large enough, convert VALUE to hex and add it to
7972 *BUFFER, update *BUFFER to point to the new end of the buffer, and
7973 decrease *LEFT. Otherwise raise an error. */
7976 remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
7978 int len = hexnumlen (value);
7981 error (_("Packet too long for target."));
7983 hexnumstr (*buffer, value);
7987 /* NUL-terminate the buffer as a convenience, if there is
7993 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
7994 value, *REMOTE_ERRNO to the remote error number or zero if none
7995 was included, and *ATTACHMENT to point to the start of the annex
7996 if any. The length of the packet isn't needed here; there may
7997 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
7999 Return 0 if the packet could be parsed, -1 if it could not. If
8000 -1 is returned, the other variables may not be initialized. */
8003 remote_hostio_parse_result (char *buffer, int *retcode,
8004 int *remote_errno, char **attachment)
8011 if (buffer[0] != 'F')
8015 *retcode = strtol (&buffer[1], &p, 16);
8016 if (errno != 0 || p == &buffer[1])
8019 /* Check for ",errno". */
8023 *remote_errno = strtol (p + 1, &p2, 16);
8024 if (errno != 0 || p + 1 == p2)
8029 /* Check for ";attachment". If there is no attachment, the
8030 packet should end here. */
8033 *attachment = p + 1;
8036 else if (*p == '\0')
8042 /* Send a prepared I/O packet to the target and read its response.
8043 The prepared packet is in the global RS->BUF before this function
8044 is called, and the answer is there when we return.
8046 COMMAND_BYTES is the length of the request to send, which may include
8047 binary data. WHICH_PACKET is the packet configuration to check
8048 before attempting a packet. If an error occurs, *REMOTE_ERRNO
8049 is set to the error number and -1 is returned. Otherwise the value
8050 returned by the function is returned.
8052 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
8053 attachment is expected; an error will be reported if there's a
8054 mismatch. If one is found, *ATTACHMENT will be set to point into
8055 the packet buffer and *ATTACHMENT_LEN will be set to the
8056 attachment's length. */
8059 remote_hostio_send_command (int command_bytes, int which_packet,
8060 int *remote_errno, char **attachment,
8061 int *attachment_len)
8063 struct remote_state *rs = get_remote_state ();
8064 int ret, bytes_read;
8065 char *attachment_tmp;
8068 || remote_protocol_packets[which_packet].support == PACKET_DISABLE)
8070 *remote_errno = FILEIO_ENOSYS;
8074 putpkt_binary (rs->buf, command_bytes);
8075 bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0);
8077 /* If it timed out, something is wrong. Don't try to parse the
8081 *remote_errno = FILEIO_EINVAL;
8085 switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
8088 *remote_errno = FILEIO_EINVAL;
8090 case PACKET_UNKNOWN:
8091 *remote_errno = FILEIO_ENOSYS;
8097 if (remote_hostio_parse_result (rs->buf, &ret, remote_errno,
8100 *remote_errno = FILEIO_EINVAL;
8104 /* Make sure we saw an attachment if and only if we expected one. */
8105 if ((attachment_tmp == NULL && attachment != NULL)
8106 || (attachment_tmp != NULL && attachment == NULL))
8108 *remote_errno = FILEIO_EINVAL;
8112 /* If an attachment was found, it must point into the packet buffer;
8113 work out how many bytes there were. */
8114 if (attachment_tmp != NULL)
8116 *attachment = attachment_tmp;
8117 *attachment_len = bytes_read - (*attachment - rs->buf);
8123 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
8124 remote file descriptor, or -1 if an error occurs (and set
8128 remote_hostio_open (const char *filename, int flags, int mode,
8131 struct remote_state *rs = get_remote_state ();
8133 int left = get_remote_packet_size () - 1;
8135 remote_buffer_add_string (&p, &left, "vFile:open:");
8137 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
8139 remote_buffer_add_string (&p, &left, ",");
8141 remote_buffer_add_int (&p, &left, flags);
8142 remote_buffer_add_string (&p, &left, ",");
8144 remote_buffer_add_int (&p, &left, mode);
8146 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open,
8147 remote_errno, NULL, NULL);
8150 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
8151 Return the number of bytes written, or -1 if an error occurs (and
8152 set *REMOTE_ERRNO). */
8155 remote_hostio_pwrite (int fd, const gdb_byte *write_buf, int len,
8156 ULONGEST offset, int *remote_errno)
8158 struct remote_state *rs = get_remote_state ();
8160 int left = get_remote_packet_size ();
8163 remote_buffer_add_string (&p, &left, "vFile:pwrite:");
8165 remote_buffer_add_int (&p, &left, fd);
8166 remote_buffer_add_string (&p, &left, ",");
8168 remote_buffer_add_int (&p, &left, offset);
8169 remote_buffer_add_string (&p, &left, ",");
8171 p += remote_escape_output (write_buf, len, p, &out_len,
8172 get_remote_packet_size () - (p - rs->buf));
8174 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite,
8175 remote_errno, NULL, NULL);
8178 /* Read up to LEN bytes FD on the remote target into READ_BUF
8179 Return the number of bytes read, or -1 if an error occurs (and
8180 set *REMOTE_ERRNO). */
8183 remote_hostio_pread (int fd, gdb_byte *read_buf, int len,
8184 ULONGEST offset, int *remote_errno)
8186 struct remote_state *rs = get_remote_state ();
8189 int left = get_remote_packet_size ();
8190 int ret, attachment_len;
8193 remote_buffer_add_string (&p, &left, "vFile:pread:");
8195 remote_buffer_add_int (&p, &left, fd);
8196 remote_buffer_add_string (&p, &left, ",");
8198 remote_buffer_add_int (&p, &left, len);
8199 remote_buffer_add_string (&p, &left, ",");
8201 remote_buffer_add_int (&p, &left, offset);
8203 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread,
8204 remote_errno, &attachment,
8210 read_len = remote_unescape_input (attachment, attachment_len,
8212 if (read_len != ret)
8213 error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
8218 /* Close FD on the remote target. Return 0, or -1 if an error occurs
8219 (and set *REMOTE_ERRNO). */
8222 remote_hostio_close (int fd, int *remote_errno)
8224 struct remote_state *rs = get_remote_state ();
8226 int left = get_remote_packet_size () - 1;
8228 remote_buffer_add_string (&p, &left, "vFile:close:");
8230 remote_buffer_add_int (&p, &left, fd);
8232 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close,
8233 remote_errno, NULL, NULL);
8236 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
8237 occurs (and set *REMOTE_ERRNO). */
8240 remote_hostio_unlink (const char *filename, int *remote_errno)
8242 struct remote_state *rs = get_remote_state ();
8244 int left = get_remote_packet_size () - 1;
8246 remote_buffer_add_string (&p, &left, "vFile:unlink:");
8248 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
8251 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink,
8252 remote_errno, NULL, NULL);
8256 remote_fileio_errno_to_host (int errnum)
8280 case FILEIO_ENOTDIR:
8300 case FILEIO_ENAMETOOLONG:
8301 return ENAMETOOLONG;
8307 remote_hostio_error (int errnum)
8309 int host_error = remote_fileio_errno_to_host (errnum);
8311 if (host_error == -1)
8312 error (_("Unknown remote I/O error %d"), errnum);
8314 error (_("Remote I/O error: %s"), safe_strerror (host_error));
8318 remote_hostio_close_cleanup (void *opaque)
8320 int fd = *(int *) opaque;
8323 remote_hostio_close (fd, &remote_errno);
8328 remote_bfd_iovec_open (struct bfd *abfd, void *open_closure)
8330 const char *filename = bfd_get_filename (abfd);
8331 int fd, remote_errno;
8334 gdb_assert (remote_filename_p (filename));
8336 fd = remote_hostio_open (filename + 7, FILEIO_O_RDONLY, 0, &remote_errno);
8339 errno = remote_fileio_errno_to_host (remote_errno);
8340 bfd_set_error (bfd_error_system_call);
8344 stream = xmalloc (sizeof (int));
8350 remote_bfd_iovec_close (struct bfd *abfd, void *stream)
8352 int fd = *(int *)stream;
8357 /* Ignore errors on close; these may happen if the remote
8358 connection was already torn down. */
8359 remote_hostio_close (fd, &remote_errno);
8365 remote_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf,
8366 file_ptr nbytes, file_ptr offset)
8368 int fd = *(int *)stream;
8370 file_ptr pos, bytes;
8373 while (nbytes > pos)
8375 bytes = remote_hostio_pread (fd, (char *)buf + pos, nbytes - pos,
8376 offset + pos, &remote_errno);
8378 /* Success, but no bytes, means end-of-file. */
8382 errno = remote_fileio_errno_to_host (remote_errno);
8383 bfd_set_error (bfd_error_system_call);
8394 remote_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb)
8396 /* FIXME: We should probably implement remote_hostio_stat. */
8397 sb->st_size = INT_MAX;
8402 remote_filename_p (const char *filename)
8404 return strncmp (filename, "remote:", 7) == 0;
8408 remote_bfd_open (const char *remote_file, const char *target)
8410 return bfd_openr_iovec (remote_file, target,
8411 remote_bfd_iovec_open, NULL,
8412 remote_bfd_iovec_pread,
8413 remote_bfd_iovec_close,
8414 remote_bfd_iovec_stat);
8418 remote_file_put (const char *local_file, const char *remote_file, int from_tty)
8420 struct cleanup *back_to, *close_cleanup;
8421 int retcode, fd, remote_errno, bytes, io_size;
8424 int bytes_in_buffer;
8429 error (_("command can only be used with remote target"));
8431 file = fopen (local_file, "rb");
8433 perror_with_name (local_file);
8434 back_to = make_cleanup_fclose (file);
8436 fd = remote_hostio_open (remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
8438 0700, &remote_errno);
8440 remote_hostio_error (remote_errno);
8442 /* Send up to this many bytes at once. They won't all fit in the
8443 remote packet limit, so we'll transfer slightly fewer. */
8444 io_size = get_remote_packet_size ();
8445 buffer = xmalloc (io_size);
8446 make_cleanup (xfree, buffer);
8448 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
8450 bytes_in_buffer = 0;
8453 while (bytes_in_buffer || !saw_eof)
8457 bytes = fread (buffer + bytes_in_buffer, 1, io_size - bytes_in_buffer,
8462 error (_("Error reading %s."), local_file);
8465 /* EOF. Unless there is something still in the
8466 buffer from the last iteration, we are done. */
8468 if (bytes_in_buffer == 0)
8476 bytes += bytes_in_buffer;
8477 bytes_in_buffer = 0;
8479 retcode = remote_hostio_pwrite (fd, buffer, bytes, offset, &remote_errno);
8482 remote_hostio_error (remote_errno);
8483 else if (retcode == 0)
8484 error (_("Remote write of %d bytes returned 0!"), bytes);
8485 else if (retcode < bytes)
8487 /* Short write. Save the rest of the read data for the next
8489 bytes_in_buffer = bytes - retcode;
8490 memmove (buffer, buffer + retcode, bytes_in_buffer);
8496 discard_cleanups (close_cleanup);
8497 if (remote_hostio_close (fd, &remote_errno))
8498 remote_hostio_error (remote_errno);
8501 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
8502 do_cleanups (back_to);
8506 remote_file_get (const char *remote_file, const char *local_file, int from_tty)
8508 struct cleanup *back_to, *close_cleanup;
8509 int retcode, fd, remote_errno, bytes, io_size;
8515 error (_("command can only be used with remote target"));
8517 fd = remote_hostio_open (remote_file, FILEIO_O_RDONLY, 0, &remote_errno);
8519 remote_hostio_error (remote_errno);
8521 file = fopen (local_file, "wb");
8523 perror_with_name (local_file);
8524 back_to = make_cleanup_fclose (file);
8526 /* Send up to this many bytes at once. They won't all fit in the
8527 remote packet limit, so we'll transfer slightly fewer. */
8528 io_size = get_remote_packet_size ();
8529 buffer = xmalloc (io_size);
8530 make_cleanup (xfree, buffer);
8532 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
8537 bytes = remote_hostio_pread (fd, buffer, io_size, offset, &remote_errno);
8539 /* Success, but no bytes, means end-of-file. */
8542 remote_hostio_error (remote_errno);
8546 bytes = fwrite (buffer, 1, bytes, file);
8548 perror_with_name (local_file);
8551 discard_cleanups (close_cleanup);
8552 if (remote_hostio_close (fd, &remote_errno))
8553 remote_hostio_error (remote_errno);
8556 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
8557 do_cleanups (back_to);
8561 remote_file_delete (const char *remote_file, int from_tty)
8563 int retcode, remote_errno;
8566 error (_("command can only be used with remote target"));
8568 retcode = remote_hostio_unlink (remote_file, &remote_errno);
8570 remote_hostio_error (remote_errno);
8573 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
8577 remote_put_command (char *args, int from_tty)
8579 struct cleanup *back_to;
8583 error_no_arg (_("file to put"));
8585 argv = gdb_buildargv (args);
8586 back_to = make_cleanup_freeargv (argv);
8587 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
8588 error (_("Invalid parameters to remote put"));
8590 remote_file_put (argv[0], argv[1], from_tty);
8592 do_cleanups (back_to);
8596 remote_get_command (char *args, int from_tty)
8598 struct cleanup *back_to;
8602 error_no_arg (_("file to get"));
8604 argv = gdb_buildargv (args);
8605 back_to = make_cleanup_freeargv (argv);
8606 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
8607 error (_("Invalid parameters to remote get"));
8609 remote_file_get (argv[0], argv[1], from_tty);
8611 do_cleanups (back_to);
8615 remote_delete_command (char *args, int from_tty)
8617 struct cleanup *back_to;
8621 error_no_arg (_("file to delete"));
8623 argv = gdb_buildargv (args);
8624 back_to = make_cleanup_freeargv (argv);
8625 if (argv[0] == NULL || argv[1] != NULL)
8626 error (_("Invalid parameters to remote delete"));
8628 remote_file_delete (argv[0], from_tty);
8630 do_cleanups (back_to);
8634 remote_command (char *args, int from_tty)
8636 help_list (remote_cmdlist, "remote ", -1, gdb_stdout);
8639 static int remote_target_can_reverse = 1;
8642 remote_can_execute_reverse (void)
8644 return remote_target_can_reverse;
8648 remote_supports_non_stop (void)
8654 remote_supports_multi_process (void)
8656 struct remote_state *rs = get_remote_state ();
8657 return remote_multi_process_p (rs);
8661 extended_remote_can_run (void)
8663 if (remote_desc != NULL)
8670 init_remote_ops (void)
8672 remote_ops.to_shortname = "remote";
8673 remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
8675 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
8676 Specify the serial device it is connected to\n\
8677 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
8678 remote_ops.to_open = remote_open;
8679 remote_ops.to_close = remote_close;
8680 remote_ops.to_detach = remote_detach;
8681 remote_ops.to_disconnect = remote_disconnect;
8682 remote_ops.to_resume = remote_resume;
8683 remote_ops.to_wait = remote_wait;
8684 remote_ops.to_fetch_registers = remote_fetch_registers;
8685 remote_ops.to_store_registers = remote_store_registers;
8686 remote_ops.to_prepare_to_store = remote_prepare_to_store;
8687 remote_ops.deprecated_xfer_memory = remote_xfer_memory;
8688 remote_ops.to_files_info = remote_files_info;
8689 remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
8690 remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
8691 remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
8692 remote_ops.to_stopped_data_address = remote_stopped_data_address;
8693 remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
8694 remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
8695 remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
8696 remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
8697 remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
8698 remote_ops.to_kill = remote_kill;
8699 remote_ops.to_load = generic_load;
8700 remote_ops.to_mourn_inferior = remote_mourn;
8701 remote_ops.to_thread_alive = remote_thread_alive;
8702 remote_ops.to_find_new_threads = remote_threads_info;
8703 remote_ops.to_pid_to_str = remote_pid_to_str;
8704 remote_ops.to_extra_thread_info = remote_threads_extra_info;
8705 remote_ops.to_stop = remote_stop;
8706 remote_ops.to_xfer_partial = remote_xfer_partial;
8707 remote_ops.to_rcmd = remote_rcmd;
8708 remote_ops.to_log_command = serial_log_command;
8709 remote_ops.to_get_thread_local_address = remote_get_thread_local_address;
8710 remote_ops.to_stratum = process_stratum;
8711 remote_ops.to_has_all_memory = 1;
8712 remote_ops.to_has_memory = 1;
8713 remote_ops.to_has_stack = 1;
8714 remote_ops.to_has_registers = 1;
8715 remote_ops.to_has_execution = 1;
8716 remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
8717 remote_ops.to_can_execute_reverse = remote_can_execute_reverse;
8718 remote_ops.to_magic = OPS_MAGIC;
8719 remote_ops.to_memory_map = remote_memory_map;
8720 remote_ops.to_flash_erase = remote_flash_erase;
8721 remote_ops.to_flash_done = remote_flash_done;
8722 remote_ops.to_read_description = remote_read_description;
8723 remote_ops.to_search_memory = remote_search_memory;
8724 remote_ops.to_can_async_p = remote_can_async_p;
8725 remote_ops.to_is_async_p = remote_is_async_p;
8726 remote_ops.to_async = remote_async;
8727 remote_ops.to_async_mask = remote_async_mask;
8728 remote_ops.to_terminal_inferior = remote_terminal_inferior;
8729 remote_ops.to_terminal_ours = remote_terminal_ours;
8730 remote_ops.to_supports_non_stop = remote_supports_non_stop;
8731 remote_ops.to_supports_multi_process = remote_supports_multi_process;
8734 /* Set up the extended remote vector by making a copy of the standard
8735 remote vector and adding to it. */
8738 init_extended_remote_ops (void)
8740 extended_remote_ops = remote_ops;
8742 extended_remote_ops.to_shortname = "extended-remote";
8743 extended_remote_ops.to_longname =
8744 "Extended remote serial target in gdb-specific protocol";
8745 extended_remote_ops.to_doc =
8746 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
8747 Specify the serial device it is connected to (e.g. /dev/ttya).";
8748 extended_remote_ops.to_open = extended_remote_open;
8749 extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
8750 extended_remote_ops.to_mourn_inferior = extended_remote_mourn;
8751 extended_remote_ops.to_detach = extended_remote_detach;
8752 extended_remote_ops.to_attach = extended_remote_attach;
8753 extended_remote_ops.to_kill = extended_remote_kill;
8754 extended_remote_ops.to_can_run = extended_remote_can_run;
8758 remote_can_async_p (void)
8760 if (!target_async_permitted)
8761 /* We only enable async when the user specifically asks for it. */
8764 /* We're async whenever the serial device is. */
8765 return remote_async_mask_value && serial_can_async_p (remote_desc);
8769 remote_is_async_p (void)
8771 if (!target_async_permitted)
8772 /* We only enable async when the user specifically asks for it. */
8775 /* We're async whenever the serial device is. */
8776 return remote_async_mask_value && serial_is_async_p (remote_desc);
8779 /* Pass the SERIAL event on and up to the client. One day this code
8780 will be able to delay notifying the client of an event until the
8781 point where an entire packet has been received. */
8783 static void (*async_client_callback) (enum inferior_event_type event_type,
8785 static void *async_client_context;
8786 static serial_event_ftype remote_async_serial_handler;
8789 remote_async_serial_handler (struct serial *scb, void *context)
8791 /* Don't propogate error information up to the client. Instead let
8792 the client find out about the error by querying the target. */
8793 async_client_callback (INF_REG_EVENT, async_client_context);
8797 remote_async_inferior_event_handler (gdb_client_data data)
8799 inferior_event_handler (INF_REG_EVENT, NULL);
8803 remote_async_get_pending_events_handler (gdb_client_data data)
8805 remote_get_pending_stop_replies ();
8809 remote_async (void (*callback) (enum inferior_event_type event_type,
8810 void *context), void *context)
8812 if (remote_async_mask_value == 0)
8813 internal_error (__FILE__, __LINE__,
8814 _("Calling remote_async when async is masked"));
8816 if (callback != NULL)
8818 serial_async (remote_desc, remote_async_serial_handler, NULL);
8819 async_client_callback = callback;
8820 async_client_context = context;
8823 serial_async (remote_desc, NULL, NULL);
8827 remote_async_mask (int new_mask)
8829 int curr_mask = remote_async_mask_value;
8830 remote_async_mask_value = new_mask;
8835 set_remote_cmd (char *args, int from_tty)
8837 help_list (remote_set_cmdlist, "set remote ", -1, gdb_stdout);
8841 show_remote_cmd (char *args, int from_tty)
8843 /* We can't just use cmd_show_list here, because we want to skip
8844 the redundant "show remote Z-packet" and the legacy aliases. */
8845 struct cleanup *showlist_chain;
8846 struct cmd_list_element *list = remote_show_cmdlist;
8848 showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist");
8849 for (; list != NULL; list = list->next)
8850 if (strcmp (list->name, "Z-packet") == 0)
8852 else if (list->type == not_set_cmd)
8853 /* Alias commands are exactly like the original, except they
8854 don't have the normal type. */
8858 struct cleanup *option_chain
8859 = make_cleanup_ui_out_tuple_begin_end (uiout, "option");
8860 ui_out_field_string (uiout, "name", list->name);
8861 ui_out_text (uiout, ": ");
8862 if (list->type == show_cmd)
8863 do_setshow_command ((char *) NULL, from_tty, list);
8865 cmd_func (list, NULL, from_tty);
8866 /* Close the tuple. */
8867 do_cleanups (option_chain);
8870 /* Close the tuple. */
8871 do_cleanups (showlist_chain);
8875 /* Function to be called whenever a new objfile (shlib) is detected. */
8877 remote_new_objfile (struct objfile *objfile)
8879 if (remote_desc != 0) /* Have a remote connection. */
8880 remote_check_symbols (objfile);
8884 _initialize_remote (void)
8886 struct remote_state *rs;
8888 /* architecture specific data */
8889 remote_gdbarch_data_handle =
8890 gdbarch_data_register_post_init (init_remote_state);
8891 remote_g_packet_data_handle =
8892 gdbarch_data_register_pre_init (remote_g_packet_data_init);
8894 /* Initialize the per-target state. At the moment there is only one
8895 of these, not one per target. Only one target is active at a
8896 time. The default buffer size is unimportant; it will be expanded
8897 whenever a larger buffer is needed. */
8898 rs = get_remote_state_raw ();
8900 rs->buf = xmalloc (rs->buf_size);
8903 add_target (&remote_ops);
8905 init_extended_remote_ops ();
8906 add_target (&extended_remote_ops);
8908 /* Hook into new objfile notification. */
8909 observer_attach_new_objfile (remote_new_objfile);
8911 /* Set up signal handlers. */
8912 sigint_remote_token =
8913 create_async_signal_handler (async_remote_interrupt, NULL);
8914 sigint_remote_twice_token =
8915 create_async_signal_handler (inferior_event_handler_wrapper, NULL);
8918 init_remote_threadtests ();
8921 /* set/show remote ... */
8923 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
8924 Remote protocol specific variables\n\
8925 Configure various remote-protocol specific variables such as\n\
8926 the packets being used"),
8927 &remote_set_cmdlist, "set remote ",
8928 0 /* allow-unknown */, &setlist);
8929 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
8930 Remote protocol specific variables\n\
8931 Configure various remote-protocol specific variables such as\n\
8932 the packets being used"),
8933 &remote_show_cmdlist, "show remote ",
8934 0 /* allow-unknown */, &showlist);
8936 add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
8937 Compare section data on target to the exec file.\n\
8938 Argument is a single section name (default: all loaded sections)."),
8941 add_cmd ("packet", class_maintenance, packet_command, _("\
8942 Send an arbitrary packet to a remote target.\n\
8943 maintenance packet TEXT\n\
8944 If GDB is talking to an inferior via the GDB serial protocol, then\n\
8945 this command sends the string TEXT to the inferior, and displays the\n\
8946 response packet. GDB supplies the initial `$' character, and the\n\
8947 terminating `#' character and checksum."),
8950 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
8951 Set whether to send break if interrupted."), _("\
8952 Show whether to send break if interrupted."), _("\
8953 If set, a break, instead of a cntrl-c, is sent to the remote target."),
8954 NULL, NULL, /* FIXME: i18n: Whether to send break if interrupted is %s. */
8955 &setlist, &showlist);
8957 /* Install commands for configuring memory read/write packets. */
8959 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
8960 Set the maximum number of bytes per memory write packet (deprecated)."),
8962 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
8963 Show the maximum number of bytes per memory write packet (deprecated)."),
8965 add_cmd ("memory-write-packet-size", no_class,
8966 set_memory_write_packet_size, _("\
8967 Set the maximum number of bytes per memory-write packet.\n\
8968 Specify the number of bytes in a packet or 0 (zero) for the\n\
8969 default packet size. The actual limit is further reduced\n\
8970 dependent on the target. Specify ``fixed'' to disable the\n\
8971 further restriction and ``limit'' to enable that restriction."),
8972 &remote_set_cmdlist);
8973 add_cmd ("memory-read-packet-size", no_class,
8974 set_memory_read_packet_size, _("\
8975 Set the maximum number of bytes per memory-read packet.\n\
8976 Specify the number of bytes in a packet or 0 (zero) for the\n\
8977 default packet size. The actual limit is further reduced\n\
8978 dependent on the target. Specify ``fixed'' to disable the\n\
8979 further restriction and ``limit'' to enable that restriction."),
8980 &remote_set_cmdlist);
8981 add_cmd ("memory-write-packet-size", no_class,
8982 show_memory_write_packet_size,
8983 _("Show the maximum number of bytes per memory-write packet."),
8984 &remote_show_cmdlist);
8985 add_cmd ("memory-read-packet-size", no_class,
8986 show_memory_read_packet_size,
8987 _("Show the maximum number of bytes per memory-read packet."),
8988 &remote_show_cmdlist);
8990 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class,
8991 &remote_hw_watchpoint_limit, _("\
8992 Set the maximum number of target hardware watchpoints."), _("\
8993 Show the maximum number of target hardware watchpoints."), _("\
8994 Specify a negative limit for unlimited."),
8995 NULL, NULL, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
8996 &remote_set_cmdlist, &remote_show_cmdlist);
8997 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class,
8998 &remote_hw_breakpoint_limit, _("\
8999 Set the maximum number of target hardware breakpoints."), _("\
9000 Show the maximum number of target hardware breakpoints."), _("\
9001 Specify a negative limit for unlimited."),
9002 NULL, NULL, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
9003 &remote_set_cmdlist, &remote_show_cmdlist);
9005 add_setshow_integer_cmd ("remoteaddresssize", class_obscure,
9006 &remote_address_size, _("\
9007 Set the maximum size of the address (in bits) in a memory packet."), _("\
9008 Show the maximum size of the address (in bits) in a memory packet."), NULL,
9010 NULL, /* FIXME: i18n: */
9011 &setlist, &showlist);
9013 add_packet_config_cmd (&remote_protocol_packets[PACKET_X],
9014 "X", "binary-download", 1);
9016 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont],
9017 "vCont", "verbose-resume", 0);
9019 add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals],
9020 "QPassSignals", "pass-signals", 0);
9022 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol],
9023 "qSymbol", "symbol-lookup", 0);
9025 add_packet_config_cmd (&remote_protocol_packets[PACKET_P],
9026 "P", "set-register", 1);
9028 add_packet_config_cmd (&remote_protocol_packets[PACKET_p],
9029 "p", "fetch-register", 1);
9031 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0],
9032 "Z0", "software-breakpoint", 0);
9034 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1],
9035 "Z1", "hardware-breakpoint", 0);
9037 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2],
9038 "Z2", "write-watchpoint", 0);
9040 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3],
9041 "Z3", "read-watchpoint", 0);
9043 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4],
9044 "Z4", "access-watchpoint", 0);
9046 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv],
9047 "qXfer:auxv:read", "read-aux-vector", 0);
9049 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features],
9050 "qXfer:features:read", "target-features", 0);
9052 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries],
9053 "qXfer:libraries:read", "library-info", 0);
9055 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map],
9056 "qXfer:memory-map:read", "memory-map", 0);
9058 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read],
9059 "qXfer:spu:read", "read-spu-object", 0);
9061 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write],
9062 "qXfer:spu:write", "write-spu-object", 0);
9064 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata],
9065 "qXfer:osdata:read", "osdata", 0);
9067 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
9068 "qGetTLSAddr", "get-thread-local-storage-address",
9071 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported],
9072 "qSupported", "supported-packets", 0);
9074 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory],
9075 "qSearch:memory", "search-memory", 0);
9077 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open],
9078 "vFile:open", "hostio-open", 0);
9080 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread],
9081 "vFile:pread", "hostio-pread", 0);
9083 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite],
9084 "vFile:pwrite", "hostio-pwrite", 0);
9086 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close],
9087 "vFile:close", "hostio-close", 0);
9089 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink],
9090 "vFile:unlink", "hostio-unlink", 0);
9092 add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach],
9093 "vAttach", "attach", 0);
9095 add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
9098 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode],
9099 "QStartNoAckMode", "noack", 0);
9101 add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill],
9102 "vKill", "kill", 0);
9104 /* Keep the old ``set remote Z-packet ...'' working. Each individual
9105 Z sub-packet has its own set and show commands, but users may
9106 have sets to this variable in their .gdbinit files (or in their
9108 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
9109 &remote_Z_packet_detect, _("\
9110 Set use of remote protocol `Z' packets"), _("\
9111 Show use of remote protocol `Z' packets "), _("\
9112 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
9114 set_remote_protocol_Z_packet_cmd,
9115 show_remote_protocol_Z_packet_cmd, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
9116 &remote_set_cmdlist, &remote_show_cmdlist);
9118 add_prefix_cmd ("remote", class_files, remote_command, _("\
9119 Manipulate files on the remote system\n\
9120 Transfer files to and from the remote target system."),
9121 &remote_cmdlist, "remote ",
9122 0 /* allow-unknown */, &cmdlist);
9124 add_cmd ("put", class_files, remote_put_command,
9125 _("Copy a local file to the remote system."),
9128 add_cmd ("get", class_files, remote_get_command,
9129 _("Copy a remote file to the local system."),
9132 add_cmd ("delete", class_files, remote_delete_command,
9133 _("Delete a remote file."),
9136 remote_exec_file = xstrdup ("");
9137 add_setshow_string_noescape_cmd ("exec-file", class_files,
9138 &remote_exec_file, _("\
9139 Set the remote pathname for \"run\""), _("\
9140 Show the remote pathname for \"run\""), NULL, NULL, NULL,
9141 &remote_set_cmdlist, &remote_show_cmdlist);
9143 /* Eventually initialize fileio. See fileio.c */
9144 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
9146 /* Take advantage of the fact that the LWP field is not used, to tag
9147 special ptids with it set to != 0. */
9148 magic_null_ptid = ptid_build (42000, 1, -1);
9149 not_sent_ptid = ptid_build (42000, 1, -2);
9150 any_thread_ptid = ptid_build (42000, 1, 0);