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);
83 static void handle_remote_sigint (int);
84 static void handle_remote_sigint_twice (int);
85 static void async_remote_interrupt (gdb_client_data);
86 void async_remote_interrupt_twice (gdb_client_data);
88 static void remote_files_info (struct target_ops *ignore);
90 static void remote_prepare_to_store (struct regcache *regcache);
92 static void remote_fetch_registers (struct regcache *regcache, int regno);
94 static void remote_resume (ptid_t ptid, int step,
95 enum target_signal siggnal);
96 static void remote_open (char *name, int from_tty);
98 static void extended_remote_open (char *name, int from_tty);
100 static void remote_open_1 (char *, int, struct target_ops *, int extended_p);
102 static void remote_close (int quitting);
104 static void remote_store_registers (struct regcache *regcache, int regno);
106 static void remote_mourn (void);
108 static void extended_remote_restart (void);
110 static void extended_remote_mourn (void);
112 static void remote_mourn_1 (struct target_ops *);
114 static void remote_send (char **buf, long *sizeof_buf_p);
116 static int readchar (int timeout);
118 static ptid_t remote_wait (ptid_t ptid,
119 struct target_waitstatus *status);
121 static void remote_kill (void);
123 static int tohex (int nib);
125 static int remote_can_async_p (void);
127 static int remote_is_async_p (void);
129 static void remote_async (void (*callback) (enum inferior_event_type event_type,
130 void *context), void *context);
132 static int remote_async_mask (int new_mask);
134 static void remote_detach (char *args, int from_tty);
136 static void remote_interrupt (int signo);
138 static void remote_interrupt_twice (int signo);
140 static void interrupt_query (void);
142 static void set_general_thread (struct ptid ptid);
143 static void set_continue_thread (struct ptid ptid);
145 static int remote_thread_alive (ptid_t);
147 static void get_offsets (void);
149 static void skip_frame (void);
151 static long read_frame (char **buf_p, long *sizeof_buf);
153 static int hexnumlen (ULONGEST num);
155 static void init_remote_ops (void);
157 static void init_extended_remote_ops (void);
159 static void remote_stop (ptid_t);
161 static int ishex (int ch, int *val);
163 static int stubhex (int ch);
165 static int hexnumstr (char *, ULONGEST);
167 static int hexnumnstr (char *, ULONGEST, int);
169 static CORE_ADDR remote_address_masked (CORE_ADDR);
171 static void print_packet (char *);
173 static unsigned long crc32 (unsigned char *, int, unsigned int);
175 static void compare_sections_command (char *, int);
177 static void packet_command (char *, int);
179 static int stub_unpack_int (char *buff, int fieldlength);
181 static ptid_t remote_current_thread (ptid_t oldptid);
183 static void remote_find_new_threads (void);
185 static void record_currthread (ptid_t currthread);
187 static int fromhex (int a);
189 static int hex2bin (const char *hex, gdb_byte *bin, int count);
191 static int bin2hex (const gdb_byte *bin, char *hex, int count);
193 static int putpkt_binary (char *buf, int cnt);
195 static void check_binary_download (CORE_ADDR addr);
197 struct packet_config;
199 static void show_packet_config_cmd (struct packet_config *config);
201 static void update_packet_config (struct packet_config *config);
203 static void set_remote_protocol_packet_cmd (char *args, int from_tty,
204 struct cmd_list_element *c);
206 static void show_remote_protocol_packet_cmd (struct ui_file *file,
208 struct cmd_list_element *c,
211 static char *write_ptid (char *buf, const char *endbuf, ptid_t ptid);
212 static ptid_t read_ptid (char *buf, char **obuf);
214 static void remote_query_supported (void);
216 static void remote_check_symbols (struct objfile *objfile);
218 void _initialize_remote (void);
222 static struct cmd_list_element *remote_cmdlist;
224 /* For "set remote" and "show remote". */
226 static struct cmd_list_element *remote_set_cmdlist;
227 static struct cmd_list_element *remote_show_cmdlist;
229 /* Description of the remote protocol state for the currently
230 connected target. This is per-target state, and independent of the
231 selected architecture. */
235 /* A buffer to use for incoming packets, and its current size. The
236 buffer is grown dynamically for larger incoming packets.
237 Outgoing packets may also be constructed in this buffer.
238 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
239 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
244 /* If we negotiated packet size explicitly (and thus can bypass
245 heuristics for the largest packet size that will not overflow
246 a buffer in the stub), this will be set to that packet size.
247 Otherwise zero, meaning to use the guessed size. */
248 long explicit_packet_size;
250 /* remote_wait is normally called when the target is running and
251 waits for a stop reply packet. But sometimes we need to call it
252 when the target is already stopped. We can send a "?" packet
253 and have remote_wait read the response. Or, if we already have
254 the response, we can stash it in BUF and tell remote_wait to
255 skip calling getpkt. This flag is set when BUF contains a
256 stop reply packet and the target is not waiting. */
257 int cached_wait_status;
259 /* True, if in no ack mode. That is, neither GDB nor the stub will
260 expect acks from each other. The connection is assumed to be
264 /* True if we're connected in extended remote mode. */
267 /* True if the stub reported support for multi-process
269 int multi_process_aware;
271 /* True if we resumed the target and we're waiting for the target to
272 stop. In the mean time, we can't start another command/query.
273 The remote server wouldn't be ready to process it, so we'd
274 timeout waiting for a reply that would never come and eventually
275 we'd close the connection. This can happen in asynchronous mode
276 because we allow GDB commands while the target is running. */
277 int waiting_for_stop_reply;
280 /* Returns true if the multi-process extensions are in effect. */
282 remote_multi_process_p (struct remote_state *rs)
284 return rs->extended && rs->multi_process_aware;
287 /* This data could be associated with a target, but we do not always
288 have access to the current target when we need it, so for now it is
289 static. This will be fine for as long as only one target is in use
291 static struct remote_state remote_state;
293 static struct remote_state *
294 get_remote_state_raw (void)
296 return &remote_state;
299 /* Description of the remote protocol for a given architecture. */
303 long offset; /* Offset into G packet. */
304 long regnum; /* GDB's internal register number. */
305 LONGEST pnum; /* Remote protocol register number. */
306 int in_g_packet; /* Always part of G packet. */
307 /* long size in bytes; == register_size (target_gdbarch, regnum);
309 /* char *name; == gdbarch_register_name (target_gdbarch, regnum);
313 struct remote_arch_state
315 /* Description of the remote protocol registers. */
316 long sizeof_g_packet;
318 /* Description of the remote protocol registers indexed by REGNUM
319 (making an array gdbarch_num_regs in size). */
320 struct packet_reg *regs;
322 /* This is the size (in chars) of the first response to the ``g''
323 packet. It is used as a heuristic when determining the maximum
324 size of memory-read and memory-write packets. A target will
325 typically only reserve a buffer large enough to hold the ``g''
326 packet. The size does not include packet overhead (headers and
328 long actual_register_packet_size;
330 /* This is the maximum size (in chars) of a non read/write packet.
331 It is also used as a cap on the size of read/write packets. */
332 long remote_packet_size;
336 /* Handle for retreving the remote protocol data from gdbarch. */
337 static struct gdbarch_data *remote_gdbarch_data_handle;
339 static struct remote_arch_state *
340 get_remote_arch_state (void)
342 return gdbarch_data (target_gdbarch, remote_gdbarch_data_handle);
345 /* Fetch the global remote target state. */
347 static struct remote_state *
348 get_remote_state (void)
350 /* Make sure that the remote architecture state has been
351 initialized, because doing so might reallocate rs->buf. Any
352 function which calls getpkt also needs to be mindful of changes
353 to rs->buf, but this call limits the number of places which run
355 get_remote_arch_state ();
357 return get_remote_state_raw ();
361 compare_pnums (const void *lhs_, const void *rhs_)
363 const struct packet_reg * const *lhs = lhs_;
364 const struct packet_reg * const *rhs = rhs_;
366 if ((*lhs)->pnum < (*rhs)->pnum)
368 else if ((*lhs)->pnum == (*rhs)->pnum)
375 init_remote_state (struct gdbarch *gdbarch)
377 int regnum, num_remote_regs, offset;
378 struct remote_state *rs = get_remote_state_raw ();
379 struct remote_arch_state *rsa;
380 struct packet_reg **remote_regs;
382 rsa = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_arch_state);
384 /* Use the architecture to build a regnum<->pnum table, which will be
385 1:1 unless a feature set specifies otherwise. */
386 rsa->regs = GDBARCH_OBSTACK_CALLOC (gdbarch,
387 gdbarch_num_regs (gdbarch),
389 for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++)
391 struct packet_reg *r = &rsa->regs[regnum];
393 if (register_size (gdbarch, regnum) == 0)
394 /* Do not try to fetch zero-sized (placeholder) registers. */
397 r->pnum = gdbarch_remote_register_number (gdbarch, regnum);
402 /* Define the g/G packet format as the contents of each register
403 with a remote protocol number, in order of ascending protocol
406 remote_regs = alloca (gdbarch_num_regs (gdbarch)
407 * sizeof (struct packet_reg *));
408 for (num_remote_regs = 0, regnum = 0;
409 regnum < gdbarch_num_regs (gdbarch);
411 if (rsa->regs[regnum].pnum != -1)
412 remote_regs[num_remote_regs++] = &rsa->regs[regnum];
414 qsort (remote_regs, num_remote_regs, sizeof (struct packet_reg *),
417 for (regnum = 0, offset = 0; regnum < num_remote_regs; regnum++)
419 remote_regs[regnum]->in_g_packet = 1;
420 remote_regs[regnum]->offset = offset;
421 offset += register_size (gdbarch, remote_regs[regnum]->regnum);
424 /* Record the maximum possible size of the g packet - it may turn out
426 rsa->sizeof_g_packet = offset;
428 /* Default maximum number of characters in a packet body. Many
429 remote stubs have a hardwired buffer size of 400 bytes
430 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
431 as the maximum packet-size to ensure that the packet and an extra
432 NUL character can always fit in the buffer. This stops GDB
433 trashing stubs that try to squeeze an extra NUL into what is
434 already a full buffer (As of 1999-12-04 that was most stubs). */
435 rsa->remote_packet_size = 400 - 1;
437 /* This one is filled in when a ``g'' packet is received. */
438 rsa->actual_register_packet_size = 0;
440 /* Should rsa->sizeof_g_packet needs more space than the
441 default, adjust the size accordingly. Remember that each byte is
442 encoded as two characters. 32 is the overhead for the packet
443 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
444 (``$NN:G...#NN'') is a better guess, the below has been padded a
446 if (rsa->sizeof_g_packet > ((rsa->remote_packet_size - 32) / 2))
447 rsa->remote_packet_size = (rsa->sizeof_g_packet * 2 + 32);
449 /* Make sure that the packet buffer is plenty big enough for
450 this architecture. */
451 if (rs->buf_size < rsa->remote_packet_size)
453 rs->buf_size = 2 * rsa->remote_packet_size;
454 rs->buf = xrealloc (rs->buf, rs->buf_size);
460 /* Return the current allowed size of a remote packet. This is
461 inferred from the current architecture, and should be used to
462 limit the length of outgoing packets. */
464 get_remote_packet_size (void)
466 struct remote_state *rs = get_remote_state ();
467 struct remote_arch_state *rsa = get_remote_arch_state ();
469 if (rs->explicit_packet_size)
470 return rs->explicit_packet_size;
472 return rsa->remote_packet_size;
475 static struct packet_reg *
476 packet_reg_from_regnum (struct remote_arch_state *rsa, long regnum)
478 if (regnum < 0 && regnum >= gdbarch_num_regs (target_gdbarch))
482 struct packet_reg *r = &rsa->regs[regnum];
483 gdb_assert (r->regnum == regnum);
488 static struct packet_reg *
489 packet_reg_from_pnum (struct remote_arch_state *rsa, LONGEST pnum)
492 for (i = 0; i < gdbarch_num_regs (target_gdbarch); i++)
494 struct packet_reg *r = &rsa->regs[i];
501 /* FIXME: graces/2002-08-08: These variables should eventually be
502 bound to an instance of the target object (as in gdbarch-tdep()),
503 when such a thing exists. */
505 /* This is set to the data address of the access causing the target
506 to stop for a watchpoint. */
507 static CORE_ADDR remote_watch_data_address;
509 /* This is non-zero if target stopped for a watchpoint. */
510 static int remote_stopped_by_watchpoint_p;
512 static struct target_ops remote_ops;
514 static struct target_ops extended_remote_ops;
516 static int remote_async_mask_value = 1;
518 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
519 ``forever'' still use the normal timeout mechanism. This is
520 currently used by the ASYNC code to guarentee that target reads
521 during the initial connect always time-out. Once getpkt has been
522 modified to return a timeout indication and, in turn
523 remote_wait()/wait_for_inferior() have gained a timeout parameter
525 static int wait_forever_enabled_p = 1;
528 /* This variable chooses whether to send a ^C or a break when the user
529 requests program interruption. Although ^C is usually what remote
530 systems expect, and that is the default here, sometimes a break is
531 preferable instead. */
533 static int remote_break;
535 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
536 remote_open knows that we don't have a file open when the program
538 static struct serial *remote_desc = NULL;
540 /* This variable sets the number of bits in an address that are to be
541 sent in a memory ("M" or "m") packet. Normally, after stripping
542 leading zeros, the entire address would be sent. This variable
543 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
544 initial implementation of remote.c restricted the address sent in
545 memory packets to ``host::sizeof long'' bytes - (typically 32
546 bits). Consequently, for 64 bit targets, the upper 32 bits of an
547 address was never sent. Since fixing this bug may cause a break in
548 some remote targets this variable is principly provided to
549 facilitate backward compatibility. */
551 static int remote_address_size;
553 /* Temporary to track who currently owns the terminal. See
554 remote_terminal_* for more details. */
556 static int remote_async_terminal_ours_p;
558 /* The executable file to use for "run" on the remote side. */
560 static char *remote_exec_file = "";
563 /* User configurable variables for the number of characters in a
564 memory read/write packet. MIN (rsa->remote_packet_size,
565 rsa->sizeof_g_packet) is the default. Some targets need smaller
566 values (fifo overruns, et.al.) and some users need larger values
567 (speed up transfers). The variables ``preferred_*'' (the user
568 request), ``current_*'' (what was actually set) and ``forced_*''
569 (Positive - a soft limit, negative - a hard limit). */
571 struct memory_packet_config
578 /* Compute the current size of a read/write packet. Since this makes
579 use of ``actual_register_packet_size'' the computation is dynamic. */
582 get_memory_packet_size (struct memory_packet_config *config)
584 struct remote_state *rs = get_remote_state ();
585 struct remote_arch_state *rsa = get_remote_arch_state ();
587 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
588 law?) that some hosts don't cope very well with large alloca()
589 calls. Eventually the alloca() code will be replaced by calls to
590 xmalloc() and make_cleanups() allowing this restriction to either
591 be lifted or removed. */
592 #ifndef MAX_REMOTE_PACKET_SIZE
593 #define MAX_REMOTE_PACKET_SIZE 16384
595 /* NOTE: 20 ensures we can write at least one byte. */
596 #ifndef MIN_REMOTE_PACKET_SIZE
597 #define MIN_REMOTE_PACKET_SIZE 20
602 if (config->size <= 0)
603 what_they_get = MAX_REMOTE_PACKET_SIZE;
605 what_they_get = config->size;
609 what_they_get = get_remote_packet_size ();
610 /* Limit the packet to the size specified by the user. */
612 && what_they_get > config->size)
613 what_they_get = config->size;
615 /* Limit it to the size of the targets ``g'' response unless we have
616 permission from the stub to use a larger packet size. */
617 if (rs->explicit_packet_size == 0
618 && rsa->actual_register_packet_size > 0
619 && what_they_get > rsa->actual_register_packet_size)
620 what_they_get = rsa->actual_register_packet_size;
622 if (what_they_get > MAX_REMOTE_PACKET_SIZE)
623 what_they_get = MAX_REMOTE_PACKET_SIZE;
624 if (what_they_get < MIN_REMOTE_PACKET_SIZE)
625 what_they_get = MIN_REMOTE_PACKET_SIZE;
627 /* Make sure there is room in the global buffer for this packet
628 (including its trailing NUL byte). */
629 if (rs->buf_size < what_they_get + 1)
631 rs->buf_size = 2 * what_they_get;
632 rs->buf = xrealloc (rs->buf, 2 * what_they_get);
635 return what_they_get;
638 /* Update the size of a read/write packet. If they user wants
639 something really big then do a sanity check. */
642 set_memory_packet_size (char *args, struct memory_packet_config *config)
644 int fixed_p = config->fixed_p;
645 long size = config->size;
647 error (_("Argument required (integer, `fixed' or `limited')."));
648 else if (strcmp (args, "hard") == 0
649 || strcmp (args, "fixed") == 0)
651 else if (strcmp (args, "soft") == 0
652 || strcmp (args, "limit") == 0)
657 size = strtoul (args, &end, 0);
659 error (_("Invalid %s (bad syntax)."), config->name);
661 /* Instead of explicitly capping the size of a packet to
662 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
663 instead allowed to set the size to something arbitrarily
665 if (size > MAX_REMOTE_PACKET_SIZE)
666 error (_("Invalid %s (too large)."), config->name);
670 if (fixed_p && !config->fixed_p)
672 if (! query (_("The target may not be able to correctly handle a %s\n"
673 "of %ld bytes. Change the packet size? "),
675 error (_("Packet size not changed."));
677 /* Update the config. */
678 config->fixed_p = fixed_p;
683 show_memory_packet_size (struct memory_packet_config *config)
685 printf_filtered (_("The %s is %ld. "), config->name, config->size);
687 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
688 get_memory_packet_size (config));
690 printf_filtered (_("Packets are limited to %ld bytes.\n"),
691 get_memory_packet_size (config));
694 static struct memory_packet_config memory_write_packet_config =
696 "memory-write-packet-size",
700 set_memory_write_packet_size (char *args, int from_tty)
702 set_memory_packet_size (args, &memory_write_packet_config);
706 show_memory_write_packet_size (char *args, int from_tty)
708 show_memory_packet_size (&memory_write_packet_config);
712 get_memory_write_packet_size (void)
714 return get_memory_packet_size (&memory_write_packet_config);
717 static struct memory_packet_config memory_read_packet_config =
719 "memory-read-packet-size",
723 set_memory_read_packet_size (char *args, int from_tty)
725 set_memory_packet_size (args, &memory_read_packet_config);
729 show_memory_read_packet_size (char *args, int from_tty)
731 show_memory_packet_size (&memory_read_packet_config);
735 get_memory_read_packet_size (void)
737 long size = get_memory_packet_size (&memory_read_packet_config);
738 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
739 extra buffer size argument before the memory read size can be
740 increased beyond this. */
741 if (size > get_remote_packet_size ())
742 size = get_remote_packet_size ();
747 /* Generic configuration support for packets the stub optionally
748 supports. Allows the user to specify the use of the packet as well
749 as allowing GDB to auto-detect support in the remote stub. */
753 PACKET_SUPPORT_UNKNOWN = 0,
762 enum auto_boolean detect;
763 enum packet_support support;
766 /* Analyze a packet's return value and update the packet config
777 update_packet_config (struct packet_config *config)
779 switch (config->detect)
781 case AUTO_BOOLEAN_TRUE:
782 config->support = PACKET_ENABLE;
784 case AUTO_BOOLEAN_FALSE:
785 config->support = PACKET_DISABLE;
787 case AUTO_BOOLEAN_AUTO:
788 config->support = PACKET_SUPPORT_UNKNOWN;
794 show_packet_config_cmd (struct packet_config *config)
796 char *support = "internal-error";
797 switch (config->support)
803 support = "disabled";
805 case PACKET_SUPPORT_UNKNOWN:
809 switch (config->detect)
811 case AUTO_BOOLEAN_AUTO:
812 printf_filtered (_("Support for the `%s' packet is auto-detected, currently %s.\n"),
813 config->name, support);
815 case AUTO_BOOLEAN_TRUE:
816 case AUTO_BOOLEAN_FALSE:
817 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
818 config->name, support);
824 add_packet_config_cmd (struct packet_config *config, const char *name,
825 const char *title, int legacy)
832 config->title = title;
833 config->detect = AUTO_BOOLEAN_AUTO;
834 config->support = PACKET_SUPPORT_UNKNOWN;
835 set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet",
837 show_doc = xstrprintf ("Show current use of remote protocol `%s' (%s) packet",
839 /* set/show TITLE-packet {auto,on,off} */
840 cmd_name = xstrprintf ("%s-packet", title);
841 add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
842 &config->detect, set_doc, show_doc, NULL, /* help_doc */
843 set_remote_protocol_packet_cmd,
844 show_remote_protocol_packet_cmd,
845 &remote_set_cmdlist, &remote_show_cmdlist);
846 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
850 legacy_name = xstrprintf ("%s-packet", name);
851 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
852 &remote_set_cmdlist);
853 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
854 &remote_show_cmdlist);
858 static enum packet_result
859 packet_check_result (const char *buf)
863 /* The stub recognized the packet request. Check that the
864 operation succeeded. */
866 && isxdigit (buf[1]) && isxdigit (buf[2])
868 /* "Enn" - definitly an error. */
871 /* Always treat "E." as an error. This will be used for
872 more verbose error messages, such as E.memtypes. */
873 if (buf[0] == 'E' && buf[1] == '.')
876 /* The packet may or may not be OK. Just assume it is. */
880 /* The stub does not support the packet. */
881 return PACKET_UNKNOWN;
884 static enum packet_result
885 packet_ok (const char *buf, struct packet_config *config)
887 enum packet_result result;
889 result = packet_check_result (buf);
894 /* The stub recognized the packet request. */
895 switch (config->support)
897 case PACKET_SUPPORT_UNKNOWN:
899 fprintf_unfiltered (gdb_stdlog,
900 "Packet %s (%s) is supported\n",
901 config->name, config->title);
902 config->support = PACKET_ENABLE;
905 internal_error (__FILE__, __LINE__,
906 _("packet_ok: attempt to use a disabled packet"));
913 /* The stub does not support the packet. */
914 switch (config->support)
917 if (config->detect == AUTO_BOOLEAN_AUTO)
918 /* If the stub previously indicated that the packet was
919 supported then there is a protocol error.. */
920 error (_("Protocol error: %s (%s) conflicting enabled responses."),
921 config->name, config->title);
923 /* The user set it wrong. */
924 error (_("Enabled packet %s (%s) not recognized by stub"),
925 config->name, config->title);
927 case PACKET_SUPPORT_UNKNOWN:
929 fprintf_unfiltered (gdb_stdlog,
930 "Packet %s (%s) is NOT supported\n",
931 config->name, config->title);
932 config->support = PACKET_DISABLE;
960 PACKET_qXfer_features,
961 PACKET_qXfer_libraries,
962 PACKET_qXfer_memory_map,
963 PACKET_qXfer_spu_read,
964 PACKET_qXfer_spu_write,
968 PACKET_qSearch_memory,
971 PACKET_QStartNoAckMode,
976 static struct packet_config remote_protocol_packets[PACKET_MAX];
979 set_remote_protocol_packet_cmd (char *args, int from_tty,
980 struct cmd_list_element *c)
982 struct packet_config *packet;
984 for (packet = remote_protocol_packets;
985 packet < &remote_protocol_packets[PACKET_MAX];
988 if (&packet->detect == c->var)
990 update_packet_config (packet);
994 internal_error (__FILE__, __LINE__, "Could not find config for %s",
999 show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty,
1000 struct cmd_list_element *c,
1003 struct packet_config *packet;
1005 for (packet = remote_protocol_packets;
1006 packet < &remote_protocol_packets[PACKET_MAX];
1009 if (&packet->detect == c->var)
1011 show_packet_config_cmd (packet);
1015 internal_error (__FILE__, __LINE__, "Could not find config for %s",
1019 /* Should we try one of the 'Z' requests? */
1023 Z_PACKET_SOFTWARE_BP,
1024 Z_PACKET_HARDWARE_BP,
1031 /* For compatibility with older distributions. Provide a ``set remote
1032 Z-packet ...'' command that updates all the Z packet types. */
1034 static enum auto_boolean remote_Z_packet_detect;
1037 set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
1038 struct cmd_list_element *c)
1041 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1043 remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect;
1044 update_packet_config (&remote_protocol_packets[PACKET_Z0 + i]);
1049 show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty,
1050 struct cmd_list_element *c,
1054 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1056 show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]);
1060 /* Should we try the 'ThreadInfo' query packet?
1062 This variable (NOT available to the user: auto-detect only!)
1063 determines whether GDB will use the new, simpler "ThreadInfo"
1064 query or the older, more complex syntax for thread queries.
1065 This is an auto-detect variable (set to true at each connect,
1066 and set to false when the target fails to recognize it). */
1068 static int use_threadinfo_query;
1069 static int use_threadextra_query;
1071 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1072 static struct async_signal_handler *sigint_remote_twice_token;
1073 static struct async_signal_handler *sigint_remote_token;
1077 static ptid_t magic_null_ptid;
1078 static ptid_t not_sent_ptid;
1079 static ptid_t any_thread_ptid;
1081 /* These are the threads which we last sent to the remote system. The
1082 TID member will be -1 for all or -2 for not sent yet. */
1084 static ptid_t general_thread;
1085 static ptid_t continue_thread;
1088 /* Call this function as a result of
1089 1) A halt indication (T packet) containing a thread id
1090 2) A direct query of currthread
1091 3) Successful execution of set thread
1095 record_currthread (ptid_t currthread)
1097 general_thread = currthread;
1099 /* If this is a new thread, add it to GDB's thread list.
1100 If we leave it up to WFI to do this, bad things will happen. */
1102 if (in_thread_list (currthread) && is_exited (currthread))
1104 /* We're seeing an event on a thread id we knew had exited.
1105 This has to be a new thread reusing the old id. Add it. */
1106 add_thread (currthread);
1110 if (!in_thread_list (currthread))
1112 if (ptid_equal (pid_to_ptid (ptid_get_pid (currthread)), inferior_ptid))
1114 /* inferior_ptid has no thread member yet. This can happen
1115 with the vAttach -> remote_wait,"TAAthread:" path if the
1116 stub doesn't support qC. This is the first stop reported
1117 after an attach, so this is the main thread. Update the
1118 ptid in the thread list. */
1119 thread_change_ptid (inferior_ptid, currthread);
1123 if (ptid_equal (magic_null_ptid, inferior_ptid))
1125 /* inferior_ptid is not set yet. This can happen with the
1126 vRun -> remote_wait,"TAAthread:" path if the stub
1127 doesn't support qC. This is the first stop reported
1128 after an attach, so this is the main thread. Update the
1129 ptid in the thread list. */
1130 thread_change_ptid (inferior_ptid, currthread);
1134 /* This is really a new thread. Add it. */
1135 add_thread (currthread);
1138 if (!in_inferior_list (ptid_get_pid (currthread)))
1139 /* When connecting to a target remote, or to a target
1140 extended-remote which already was debugging an inferior, we may
1141 not know about it yet --- add it. */
1142 add_inferior (ptid_get_pid (currthread));
1145 static char *last_pass_packet;
1147 /* If 'QPassSignals' is supported, tell the remote stub what signals
1148 it can simply pass through to the inferior without reporting. */
1151 remote_pass_signals (void)
1153 if (remote_protocol_packets[PACKET_QPassSignals].support != PACKET_DISABLE)
1155 char *pass_packet, *p;
1156 int numsigs = (int) TARGET_SIGNAL_LAST;
1159 gdb_assert (numsigs < 256);
1160 for (i = 0; i < numsigs; i++)
1162 if (signal_stop_state (i) == 0
1163 && signal_print_state (i) == 0
1164 && signal_pass_state (i) == 1)
1167 pass_packet = xmalloc (count * 3 + strlen ("QPassSignals:") + 1);
1168 strcpy (pass_packet, "QPassSignals:");
1169 p = pass_packet + strlen (pass_packet);
1170 for (i = 0; i < numsigs; i++)
1172 if (signal_stop_state (i) == 0
1173 && signal_print_state (i) == 0
1174 && signal_pass_state (i) == 1)
1177 *p++ = tohex (i >> 4);
1178 *p++ = tohex (i & 15);
1187 if (!last_pass_packet || strcmp (last_pass_packet, pass_packet))
1189 struct remote_state *rs = get_remote_state ();
1190 char *buf = rs->buf;
1192 putpkt (pass_packet);
1193 getpkt (&rs->buf, &rs->buf_size, 0);
1194 packet_ok (buf, &remote_protocol_packets[PACKET_QPassSignals]);
1195 if (last_pass_packet)
1196 xfree (last_pass_packet);
1197 last_pass_packet = pass_packet;
1200 xfree (pass_packet);
1204 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
1205 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
1206 thread. If GEN is set, set the general thread, if not, then set
1207 the step/continue thread. */
1209 set_thread (struct ptid ptid, int gen)
1211 struct remote_state *rs = get_remote_state ();
1212 ptid_t state = gen ? general_thread : continue_thread;
1213 char *buf = rs->buf;
1214 char *endbuf = rs->buf + get_remote_packet_size ();
1216 if (ptid_equal (state, ptid))
1220 *buf++ = gen ? 'g' : 'c';
1221 if (ptid_equal (ptid, magic_null_ptid))
1222 xsnprintf (buf, endbuf - buf, "0");
1223 else if (ptid_equal (ptid, any_thread_ptid))
1224 xsnprintf (buf, endbuf - buf, "0");
1225 else if (ptid_equal (ptid, minus_one_ptid))
1226 xsnprintf (buf, endbuf - buf, "-1");
1228 write_ptid (buf, endbuf, ptid);
1230 getpkt (&rs->buf, &rs->buf_size, 0);
1232 general_thread = ptid;
1234 continue_thread = ptid;
1238 set_general_thread (struct ptid ptid)
1240 set_thread (ptid, 1);
1244 set_continue_thread (struct ptid ptid)
1246 set_thread (ptid, 0);
1249 /* Change the remote current process. Which thread within the process
1250 ends up selected isn't important, as long as it is the same process
1251 as what INFERIOR_PTID points to.
1253 This comes from that fact that there is no explicit notion of
1254 "selected process" in the protocol. The selected process for
1255 general operations is the process the selected general thread
1259 set_general_process (void)
1261 struct remote_state *rs = get_remote_state ();
1263 /* If the remote can't handle multiple processes, don't bother. */
1264 if (!remote_multi_process_p (rs))
1267 /* We only need to change the remote current thread if it's pointing
1268 at some other process. */
1269 if (ptid_get_pid (general_thread) != ptid_get_pid (inferior_ptid))
1270 set_general_thread (inferior_ptid);
1274 /* Return nonzero if the thread PTID is still alive on the remote
1278 remote_thread_alive (ptid_t ptid)
1280 struct remote_state *rs = get_remote_state ();
1281 int tid = ptid_get_tid (ptid);
1284 if (ptid_equal (ptid, magic_null_ptid))
1285 /* The main thread is always alive. */
1288 if (ptid_get_pid (ptid) != 0 && ptid_get_tid (ptid) == 0)
1289 /* The main thread is always alive. This can happen after a
1290 vAttach, if the remote side doesn't support
1295 endp = rs->buf + get_remote_packet_size ();
1298 write_ptid (p, endp, ptid);
1301 getpkt (&rs->buf, &rs->buf_size, 0);
1302 return (rs->buf[0] == 'O' && rs->buf[1] == 'K');
1305 /* About these extended threadlist and threadinfo packets. They are
1306 variable length packets but, the fields within them are often fixed
1307 length. They are redundent enough to send over UDP as is the
1308 remote protocol in general. There is a matching unit test module
1311 #define OPAQUETHREADBYTES 8
1313 /* a 64 bit opaque identifier */
1314 typedef unsigned char threadref[OPAQUETHREADBYTES];
1316 /* WARNING: This threadref data structure comes from the remote O.S.,
1317 libstub protocol encoding, and remote.c. it is not particularly
1320 /* Right now, the internal structure is int. We want it to be bigger.
1324 typedef int gdb_threadref; /* Internal GDB thread reference. */
1326 /* gdb_ext_thread_info is an internal GDB data structure which is
1327 equivalent to the reply of the remote threadinfo packet. */
1329 struct gdb_ext_thread_info
1331 threadref threadid; /* External form of thread reference. */
1332 int active; /* Has state interesting to GDB?
1334 char display[256]; /* Brief state display, name,
1335 blocked/suspended. */
1336 char shortname[32]; /* To be used to name threads. */
1337 char more_display[256]; /* Long info, statistics, queue depth,
1341 /* The volume of remote transfers can be limited by submitting
1342 a mask containing bits specifying the desired information.
1343 Use a union of these values as the 'selection' parameter to
1344 get_thread_info. FIXME: Make these TAG names more thread specific.
1347 #define TAG_THREADID 1
1348 #define TAG_EXISTS 2
1349 #define TAG_DISPLAY 4
1350 #define TAG_THREADNAME 8
1351 #define TAG_MOREDISPLAY 16
1353 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1355 char *unpack_varlen_hex (char *buff, ULONGEST *result);
1357 static char *unpack_nibble (char *buf, int *val);
1359 static char *pack_nibble (char *buf, int nibble);
1361 static char *pack_hex_byte (char *pkt, int /* unsigned char */ byte);
1363 static char *unpack_byte (char *buf, int *value);
1365 static char *pack_int (char *buf, int value);
1367 static char *unpack_int (char *buf, int *value);
1369 static char *unpack_string (char *src, char *dest, int length);
1371 static char *pack_threadid (char *pkt, threadref *id);
1373 static char *unpack_threadid (char *inbuf, threadref *id);
1375 void int_to_threadref (threadref *id, int value);
1377 static int threadref_to_int (threadref *ref);
1379 static void copy_threadref (threadref *dest, threadref *src);
1381 static int threadmatch (threadref *dest, threadref *src);
1383 static char *pack_threadinfo_request (char *pkt, int mode,
1386 static int remote_unpack_thread_info_response (char *pkt,
1387 threadref *expectedref,
1388 struct gdb_ext_thread_info
1392 static int remote_get_threadinfo (threadref *threadid,
1393 int fieldset, /*TAG mask */
1394 struct gdb_ext_thread_info *info);
1396 static char *pack_threadlist_request (char *pkt, int startflag,
1398 threadref *nextthread);
1400 static int parse_threadlist_response (char *pkt,
1402 threadref *original_echo,
1403 threadref *resultlist,
1406 static int remote_get_threadlist (int startflag,
1407 threadref *nextthread,
1411 threadref *threadlist);
1413 typedef int (*rmt_thread_action) (threadref *ref, void *context);
1415 static int remote_threadlist_iterator (rmt_thread_action stepfunction,
1416 void *context, int looplimit);
1418 static int remote_newthread_step (threadref *ref, void *context);
1421 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
1422 buffer we're allowed to write to. Returns
1423 BUF+CHARACTERS_WRITTEN. */
1426 write_ptid (char *buf, const char *endbuf, ptid_t ptid)
1429 struct remote_state *rs = get_remote_state ();
1431 if (remote_multi_process_p (rs))
1433 pid = ptid_get_pid (ptid);
1435 buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid);
1437 buf += xsnprintf (buf, endbuf - buf, "p%x.", pid);
1439 tid = ptid_get_tid (ptid);
1441 buf += xsnprintf (buf, endbuf - buf, "-%x", -tid);
1443 buf += xsnprintf (buf, endbuf - buf, "%x", tid);
1448 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
1449 passed the last parsed char. Returns null_ptid on error. */
1452 read_ptid (char *buf, char **obuf)
1456 ULONGEST pid = 0, tid = 0;
1461 /* Multi-process ptid. */
1462 pp = unpack_varlen_hex (p + 1, &pid);
1464 error (_("invalid remote ptid: %s\n"), p);
1467 pp = unpack_varlen_hex (p + 1, &tid);
1470 return ptid_build (pid, 0, tid);
1473 /* No multi-process. Just a tid. */
1474 pp = unpack_varlen_hex (p, &tid);
1476 /* Since the stub is not sending a process id, then default to
1477 what's in inferior_ptid. */
1478 pid = ptid_get_pid (inferior_ptid);
1482 return ptid_build (pid, 0, tid);
1485 /* Encode 64 bits in 16 chars of hex. */
1487 static const char hexchars[] = "0123456789abcdef";
1490 ishex (int ch, int *val)
1492 if ((ch >= 'a') && (ch <= 'f'))
1494 *val = ch - 'a' + 10;
1497 if ((ch >= 'A') && (ch <= 'F'))
1499 *val = ch - 'A' + 10;
1502 if ((ch >= '0') && (ch <= '9'))
1513 if (ch >= 'a' && ch <= 'f')
1514 return ch - 'a' + 10;
1515 if (ch >= '0' && ch <= '9')
1517 if (ch >= 'A' && ch <= 'F')
1518 return ch - 'A' + 10;
1523 stub_unpack_int (char *buff, int fieldlength)
1530 nibble = stubhex (*buff++);
1534 retval = retval << 4;
1540 unpack_varlen_hex (char *buff, /* packet to parse */
1544 ULONGEST retval = 0;
1546 while (ishex (*buff, &nibble))
1549 retval = retval << 4;
1550 retval |= nibble & 0x0f;
1557 unpack_nibble (char *buf, int *val)
1559 *val = fromhex (*buf++);
1564 pack_nibble (char *buf, int nibble)
1566 *buf++ = hexchars[(nibble & 0x0f)];
1571 pack_hex_byte (char *pkt, int byte)
1573 *pkt++ = hexchars[(byte >> 4) & 0xf];
1574 *pkt++ = hexchars[(byte & 0xf)];
1579 unpack_byte (char *buf, int *value)
1581 *value = stub_unpack_int (buf, 2);
1586 pack_int (char *buf, int value)
1588 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
1589 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
1590 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
1591 buf = pack_hex_byte (buf, (value & 0xff));
1596 unpack_int (char *buf, int *value)
1598 *value = stub_unpack_int (buf, 8);
1602 #if 0 /* Currently unused, uncomment when needed. */
1603 static char *pack_string (char *pkt, char *string);
1606 pack_string (char *pkt, char *string)
1611 len = strlen (string);
1613 len = 200; /* Bigger than most GDB packets, junk??? */
1614 pkt = pack_hex_byte (pkt, len);
1618 if ((ch == '\0') || (ch == '#'))
1619 ch = '*'; /* Protect encapsulation. */
1624 #endif /* 0 (unused) */
1627 unpack_string (char *src, char *dest, int length)
1636 pack_threadid (char *pkt, threadref *id)
1639 unsigned char *altid;
1641 altid = (unsigned char *) id;
1642 limit = pkt + BUF_THREAD_ID_SIZE;
1644 pkt = pack_hex_byte (pkt, *altid++);
1650 unpack_threadid (char *inbuf, threadref *id)
1653 char *limit = inbuf + BUF_THREAD_ID_SIZE;
1656 altref = (char *) id;
1658 while (inbuf < limit)
1660 x = stubhex (*inbuf++);
1661 y = stubhex (*inbuf++);
1662 *altref++ = (x << 4) | y;
1667 /* Externally, threadrefs are 64 bits but internally, they are still
1668 ints. This is due to a mismatch of specifications. We would like
1669 to use 64bit thread references internally. This is an adapter
1673 int_to_threadref (threadref *id, int value)
1675 unsigned char *scan;
1677 scan = (unsigned char *) id;
1683 *scan++ = (value >> 24) & 0xff;
1684 *scan++ = (value >> 16) & 0xff;
1685 *scan++ = (value >> 8) & 0xff;
1686 *scan++ = (value & 0xff);
1690 threadref_to_int (threadref *ref)
1693 unsigned char *scan;
1699 value = (value << 8) | ((*scan++) & 0xff);
1704 copy_threadref (threadref *dest, threadref *src)
1707 unsigned char *csrc, *cdest;
1709 csrc = (unsigned char *) src;
1710 cdest = (unsigned char *) dest;
1717 threadmatch (threadref *dest, threadref *src)
1719 /* Things are broken right now, so just assume we got a match. */
1721 unsigned char *srcp, *destp;
1723 srcp = (char *) src;
1724 destp = (char *) dest;
1728 result &= (*srcp++ == *destp++) ? 1 : 0;
1735 threadid:1, # always request threadid
1742 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1745 pack_threadinfo_request (char *pkt, int mode, threadref *id)
1747 *pkt++ = 'q'; /* Info Query */
1748 *pkt++ = 'P'; /* process or thread info */
1749 pkt = pack_int (pkt, mode); /* mode */
1750 pkt = pack_threadid (pkt, id); /* threadid */
1751 *pkt = '\0'; /* terminate */
1755 /* These values tag the fields in a thread info response packet. */
1756 /* Tagging the fields allows us to request specific fields and to
1757 add more fields as time goes by. */
1759 #define TAG_THREADID 1 /* Echo the thread identifier. */
1760 #define TAG_EXISTS 2 /* Is this process defined enough to
1761 fetch registers and its stack? */
1762 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1763 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
1764 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1768 remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
1769 struct gdb_ext_thread_info *info)
1771 struct remote_state *rs = get_remote_state ();
1775 char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */
1778 /* info->threadid = 0; FIXME: implement zero_threadref. */
1780 info->display[0] = '\0';
1781 info->shortname[0] = '\0';
1782 info->more_display[0] = '\0';
1784 /* Assume the characters indicating the packet type have been
1786 pkt = unpack_int (pkt, &mask); /* arg mask */
1787 pkt = unpack_threadid (pkt, &ref);
1790 warning (_("Incomplete response to threadinfo request."));
1791 if (!threadmatch (&ref, expectedref))
1792 { /* This is an answer to a different request. */
1793 warning (_("ERROR RMT Thread info mismatch."));
1796 copy_threadref (&info->threadid, &ref);
1798 /* Loop on tagged fields , try to bail if somthing goes wrong. */
1800 /* Packets are terminated with nulls. */
1801 while ((pkt < limit) && mask && *pkt)
1803 pkt = unpack_int (pkt, &tag); /* tag */
1804 pkt = unpack_byte (pkt, &length); /* length */
1805 if (!(tag & mask)) /* Tags out of synch with mask. */
1807 warning (_("ERROR RMT: threadinfo tag mismatch."));
1811 if (tag == TAG_THREADID)
1815 warning (_("ERROR RMT: length of threadid is not 16."));
1819 pkt = unpack_threadid (pkt, &ref);
1820 mask = mask & ~TAG_THREADID;
1823 if (tag == TAG_EXISTS)
1825 info->active = stub_unpack_int (pkt, length);
1827 mask = mask & ~(TAG_EXISTS);
1830 warning (_("ERROR RMT: 'exists' length too long."));
1836 if (tag == TAG_THREADNAME)
1838 pkt = unpack_string (pkt, &info->shortname[0], length);
1839 mask = mask & ~TAG_THREADNAME;
1842 if (tag == TAG_DISPLAY)
1844 pkt = unpack_string (pkt, &info->display[0], length);
1845 mask = mask & ~TAG_DISPLAY;
1848 if (tag == TAG_MOREDISPLAY)
1850 pkt = unpack_string (pkt, &info->more_display[0], length);
1851 mask = mask & ~TAG_MOREDISPLAY;
1854 warning (_("ERROR RMT: unknown thread info tag."));
1855 break; /* Not a tag we know about. */
1861 remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
1862 struct gdb_ext_thread_info *info)
1864 struct remote_state *rs = get_remote_state ();
1867 pack_threadinfo_request (rs->buf, fieldset, threadid);
1869 getpkt (&rs->buf, &rs->buf_size, 0);
1871 if (rs->buf[0] == '\0')
1874 result = remote_unpack_thread_info_response (rs->buf + 2,
1879 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1882 pack_threadlist_request (char *pkt, int startflag, int threadcount,
1883 threadref *nextthread)
1885 *pkt++ = 'q'; /* info query packet */
1886 *pkt++ = 'L'; /* Process LIST or threadLIST request */
1887 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
1888 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
1889 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
1894 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1897 parse_threadlist_response (char *pkt, int result_limit,
1898 threadref *original_echo, threadref *resultlist,
1901 struct remote_state *rs = get_remote_state ();
1903 int count, resultcount, done;
1906 /* Assume the 'q' and 'M chars have been stripped. */
1907 limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE);
1908 /* done parse past here */
1909 pkt = unpack_byte (pkt, &count); /* count field */
1910 pkt = unpack_nibble (pkt, &done);
1911 /* The first threadid is the argument threadid. */
1912 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
1913 while ((count-- > 0) && (pkt < limit))
1915 pkt = unpack_threadid (pkt, resultlist++);
1916 if (resultcount++ >= result_limit)
1925 remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
1926 int *done, int *result_count, threadref *threadlist)
1928 struct remote_state *rs = get_remote_state ();
1929 static threadref echo_nextthread;
1932 /* Trancate result limit to be smaller than the packet size. */
1933 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= get_remote_packet_size ())
1934 result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2;
1936 pack_threadlist_request (rs->buf, startflag, result_limit, nextthread);
1938 getpkt (&rs->buf, &rs->buf_size, 0);
1940 if (*rs->buf == '\0')
1944 parse_threadlist_response (rs->buf + 2, result_limit, &echo_nextthread,
1947 if (!threadmatch (&echo_nextthread, nextthread))
1949 /* FIXME: This is a good reason to drop the packet. */
1950 /* Possably, there is a duplicate response. */
1952 retransmit immediatly - race conditions
1953 retransmit after timeout - yes
1955 wait for packet, then exit
1957 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
1958 return 0; /* I choose simply exiting. */
1960 if (*result_count <= 0)
1964 warning (_("RMT ERROR : failed to get remote thread list."));
1967 return result; /* break; */
1969 if (*result_count > result_limit)
1972 warning (_("RMT ERROR: threadlist response longer than requested."));
1978 /* This is the interface between remote and threads, remotes upper
1981 /* remote_find_new_threads retrieves the thread list and for each
1982 thread in the list, looks up the thread in GDB's internal list,
1983 adding the thread if it does not already exist. This involves
1984 getting partial thread lists from the remote target so, polling the
1985 quit_flag is required. */
1988 /* About this many threadisds fit in a packet. */
1990 #define MAXTHREADLISTRESULTS 32
1993 remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
1996 int done, i, result_count;
2000 static threadref nextthread;
2001 static threadref resultthreadlist[MAXTHREADLISTRESULTS];
2006 if (loopcount++ > looplimit)
2009 warning (_("Remote fetch threadlist -infinite loop-."));
2012 if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS,
2013 &done, &result_count, resultthreadlist))
2018 /* Clear for later iterations. */
2020 /* Setup to resume next batch of thread references, set nextthread. */
2021 if (result_count >= 1)
2022 copy_threadref (&nextthread, &resultthreadlist[result_count - 1]);
2024 while (result_count--)
2025 if (!(result = (*stepfunction) (&resultthreadlist[i++], context)))
2032 remote_newthread_step (threadref *ref, void *context)
2034 int pid = ptid_get_pid (inferior_ptid);
2035 ptid_t ptid = ptid_build (pid, 0, threadref_to_int (ref));
2037 if (!in_thread_list (ptid))
2039 return 1; /* continue iterator */
2042 #define CRAZY_MAX_THREADS 1000
2045 remote_current_thread (ptid_t oldpid)
2047 struct remote_state *rs = get_remote_state ();
2053 getpkt (&rs->buf, &rs->buf_size, 0);
2054 if (rs->buf[0] == 'Q' && rs->buf[1] == 'C')
2055 return read_ptid (&rs->buf[2], NULL);
2060 /* Find new threads for info threads command.
2061 * Original version, using John Metzler's thread protocol.
2065 remote_find_new_threads (void)
2067 remote_threadlist_iterator (remote_newthread_step, 0,
2072 * Find all threads for info threads command.
2073 * Uses new thread protocol contributed by Cisco.
2074 * Falls back and attempts to use the older method (above)
2075 * if the target doesn't respond to the new method.
2079 remote_threads_info (void)
2081 struct remote_state *rs = get_remote_state ();
2085 if (remote_desc == 0) /* paranoia */
2086 error (_("Command can only be used when connected to the remote target."));
2088 if (use_threadinfo_query)
2090 putpkt ("qfThreadInfo");
2091 getpkt (&rs->buf, &rs->buf_size, 0);
2093 if (bufp[0] != '\0') /* q packet recognized */
2095 while (*bufp++ == 'm') /* reply contains one or more TID */
2099 new_thread = read_ptid (bufp, &bufp);
2100 if (!ptid_equal (new_thread, null_ptid)
2101 && !in_thread_list (new_thread))
2103 if (!in_inferior_list (ptid_get_pid (new_thread)))
2104 /* When connected to a multi-process aware
2105 stub, "info threads" may show up threads of
2106 inferiors we didn't know about yet. Add
2108 add_inferior (ptid_get_pid (new_thread));
2110 add_thread (new_thread);
2113 while (*bufp++ == ','); /* comma-separated list */
2114 putpkt ("qsThreadInfo");
2115 getpkt (&rs->buf, &rs->buf_size, 0);
2122 /* Else fall back to old method based on jmetzler protocol. */
2123 use_threadinfo_query = 0;
2124 remote_find_new_threads ();
2129 * Collect a descriptive string about the given thread.
2130 * The target may say anything it wants to about the thread
2131 * (typically info about its blocked / runnable state, name, etc.).
2132 * This string will appear in the info threads display.
2134 * Optional: targets are not required to implement this function.
2138 remote_threads_extra_info (struct thread_info *tp)
2140 struct remote_state *rs = get_remote_state ();
2144 struct gdb_ext_thread_info threadinfo;
2145 static char display_buf[100]; /* arbitrary... */
2146 int n = 0; /* position in display_buf */
2148 if (remote_desc == 0) /* paranoia */
2149 internal_error (__FILE__, __LINE__,
2150 _("remote_threads_extra_info"));
2152 if (ptid_equal (tp->ptid, magic_null_ptid)
2153 || (ptid_get_pid (tp->ptid) != 0 && ptid_get_tid (tp->ptid) == 0))
2154 /* This is the main thread which was added by GDB. The remote
2155 server doesn't know about it. */
2158 if (use_threadextra_query)
2161 char *endb = rs->buf + get_remote_packet_size ();
2163 xsnprintf (b, endb - b, "qThreadExtraInfo,");
2165 write_ptid (b, endb, tp->ptid);
2168 getpkt (&rs->buf, &rs->buf_size, 0);
2169 if (rs->buf[0] != 0)
2171 n = min (strlen (rs->buf) / 2, sizeof (display_buf));
2172 result = hex2bin (rs->buf, (gdb_byte *) display_buf, n);
2173 display_buf [result] = '\0';
2178 /* If the above query fails, fall back to the old method. */
2179 use_threadextra_query = 0;
2180 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
2181 | TAG_MOREDISPLAY | TAG_DISPLAY;
2182 int_to_threadref (&id, ptid_get_tid (tp->ptid));
2183 if (remote_get_threadinfo (&id, set, &threadinfo))
2184 if (threadinfo.active)
2186 if (*threadinfo.shortname)
2187 n += xsnprintf (&display_buf[0], sizeof (display_buf) - n,
2188 " Name: %s,", threadinfo.shortname);
2189 if (*threadinfo.display)
2190 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
2191 " State: %s,", threadinfo.display);
2192 if (*threadinfo.more_display)
2193 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
2194 " Priority: %s", threadinfo.more_display);
2198 /* For purely cosmetic reasons, clear up trailing commas. */
2199 if (',' == display_buf[n-1])
2200 display_buf[n-1] = ' ';
2208 /* Restart the remote side; this is an extended protocol operation. */
2211 extended_remote_restart (void)
2213 struct remote_state *rs = get_remote_state ();
2215 /* Send the restart command; for reasons I don't understand the
2216 remote side really expects a number after the "R". */
2217 xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0);
2220 remote_fileio_reset ();
2223 /* Clean up connection to a remote debugger. */
2226 remote_close (int quitting)
2230 /* Unregister the file descriptor from the event loop. */
2231 if (target_is_async_p ())
2232 target_async (NULL, 0);
2233 serial_close (remote_desc);
2237 /* Make sure we don't leave the async SIGINT signal handler
2239 signal (SIGINT, handle_sigint);
2241 /* We don't have a connection to the remote stub anymore. Get rid
2242 of all the inferiors and their threads we were controlling. */
2243 discard_all_inferiors ();
2245 generic_mourn_inferior ();
2248 /* Query the remote side for the text, data and bss offsets. */
2253 struct remote_state *rs = get_remote_state ();
2256 int lose, num_segments = 0, do_sections, do_segments;
2257 CORE_ADDR text_addr, data_addr, bss_addr, segments[2];
2258 struct section_offsets *offs;
2259 struct symfile_segment_data *data;
2261 if (symfile_objfile == NULL)
2264 putpkt ("qOffsets");
2265 getpkt (&rs->buf, &rs->buf_size, 0);
2268 if (buf[0] == '\000')
2269 return; /* Return silently. Stub doesn't support
2273 warning (_("Remote failure reply: %s"), buf);
2277 /* Pick up each field in turn. This used to be done with scanf, but
2278 scanf will make trouble if CORE_ADDR size doesn't match
2279 conversion directives correctly. The following code will work
2280 with any size of CORE_ADDR. */
2281 text_addr = data_addr = bss_addr = 0;
2285 if (strncmp (ptr, "Text=", 5) == 0)
2288 /* Don't use strtol, could lose on big values. */
2289 while (*ptr && *ptr != ';')
2290 text_addr = (text_addr << 4) + fromhex (*ptr++);
2292 if (strncmp (ptr, ";Data=", 6) == 0)
2295 while (*ptr && *ptr != ';')
2296 data_addr = (data_addr << 4) + fromhex (*ptr++);
2301 if (!lose && strncmp (ptr, ";Bss=", 5) == 0)
2304 while (*ptr && *ptr != ';')
2305 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
2307 if (bss_addr != data_addr)
2308 warning (_("Target reported unsupported offsets: %s"), buf);
2313 else if (strncmp (ptr, "TextSeg=", 8) == 0)
2316 /* Don't use strtol, could lose on big values. */
2317 while (*ptr && *ptr != ';')
2318 text_addr = (text_addr << 4) + fromhex (*ptr++);
2321 if (strncmp (ptr, ";DataSeg=", 9) == 0)
2324 while (*ptr && *ptr != ';')
2325 data_addr = (data_addr << 4) + fromhex (*ptr++);
2333 error (_("Malformed response to offset query, %s"), buf);
2334 else if (*ptr != '\0')
2335 warning (_("Target reported unsupported offsets: %s"), buf);
2337 offs = ((struct section_offsets *)
2338 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
2339 memcpy (offs, symfile_objfile->section_offsets,
2340 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
2342 data = get_symfile_segment_data (symfile_objfile->obfd);
2343 do_segments = (data != NULL);
2344 do_sections = num_segments == 0;
2346 if (num_segments > 0)
2348 segments[0] = text_addr;
2349 segments[1] = data_addr;
2351 /* If we have two segments, we can still try to relocate everything
2352 by assuming that the .text and .data offsets apply to the whole
2353 text and data segments. Convert the offsets given in the packet
2354 to base addresses for symfile_map_offsets_to_segments. */
2355 else if (data && data->num_segments == 2)
2357 segments[0] = data->segment_bases[0] + text_addr;
2358 segments[1] = data->segment_bases[1] + data_addr;
2361 /* If the object file has only one segment, assume that it is text
2362 rather than data; main programs with no writable data are rare,
2363 but programs with no code are useless. Of course the code might
2364 have ended up in the data segment... to detect that we would need
2365 the permissions here. */
2366 else if (data && data->num_segments == 1)
2368 segments[0] = data->segment_bases[0] + text_addr;
2371 /* There's no way to relocate by segment. */
2377 int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data,
2378 offs, num_segments, segments);
2380 if (ret == 0 && !do_sections)
2381 error (_("Can not handle qOffsets TextSeg response with this symbol file"));
2388 free_symfile_segment_data (data);
2392 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
2394 /* This is a temporary kludge to force data and bss to use the same offsets
2395 because that's what nlmconv does now. The real solution requires changes
2396 to the stub and remote.c that I don't have time to do right now. */
2398 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
2399 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
2402 objfile_relocate (symfile_objfile, offs);
2405 /* Stub for catch_exception. */
2407 struct start_remote_args
2411 /* The current target. */
2412 struct target_ops *target;
2414 /* Non-zero if this is an extended-remote target. */
2419 remote_start_remote (struct ui_out *uiout, void *opaque)
2421 struct start_remote_args *args = opaque;
2422 struct remote_state *rs = get_remote_state ();
2423 struct packet_config *noack_config;
2424 char *wait_status = NULL;
2426 immediate_quit++; /* Allow user to interrupt it. */
2428 /* Ack any packet which the remote side has already sent. */
2429 serial_write (remote_desc, "+", 1);
2431 /* The first packet we send to the target is the optional "supported
2432 packets" request. If the target can answer this, it will tell us
2433 which later probes to skip. */
2434 remote_query_supported ();
2436 /* Next, we possibly activate noack mode.
2438 If the QStartNoAckMode packet configuration is set to AUTO,
2439 enable noack mode if the stub reported a wish for it with
2442 If set to TRUE, then enable noack mode even if the stub didn't
2443 report it in qSupported. If the stub doesn't reply OK, the
2444 session ends with an error.
2446 If FALSE, then don't activate noack mode, regardless of what the
2447 stub claimed should be the default with qSupported. */
2449 noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode];
2451 if (noack_config->detect == AUTO_BOOLEAN_TRUE
2452 || (noack_config->detect == AUTO_BOOLEAN_AUTO
2453 && noack_config->support == PACKET_ENABLE))
2455 putpkt ("QStartNoAckMode");
2456 getpkt (&rs->buf, &rs->buf_size, 0);
2457 if (packet_ok (rs->buf, noack_config) == PACKET_OK)
2461 if (args->extended_p)
2463 /* Tell the remote that we are using the extended protocol. */
2465 getpkt (&rs->buf, &rs->buf_size, 0);
2468 /* Next, if the target can specify a description, read it. We do
2469 this before anything involving memory or registers. */
2470 target_find_description ();
2472 /* Check whether the target is running now. */
2474 getpkt (&rs->buf, &rs->buf_size, 0);
2476 if (rs->buf[0] == 'W' || rs->buf[0] == 'X')
2478 if (args->extended_p)
2480 /* We're connected, but not running. Drop out before we
2481 call start_remote. */
2482 target_mark_exited (args->target);
2486 error (_("The target is not running (try extended-remote?)"));
2490 if (args->extended_p)
2491 target_mark_running (args->target);
2493 /* Save the reply for later. */
2494 wait_status = alloca (strlen (rs->buf) + 1);
2495 strcpy (wait_status, rs->buf);
2499 init_thread_list ();
2501 /* Let the stub know that we want it to return the thread. */
2502 set_continue_thread (minus_one_ptid);
2504 /* Without this, some commands which require an active target
2505 (such as kill) won't work. This variable serves (at least)
2506 double duty as both the pid of the target process (if it has
2507 such), and as a flag indicating that a target is active.
2508 These functions should be split out into seperate variables,
2509 especially since GDB will someday have a notion of debugging
2510 several processes. */
2511 inferior_ptid = magic_null_ptid;
2513 /* Now, if we have thread information, update inferior_ptid. */
2514 inferior_ptid = remote_current_thread (inferior_ptid);
2516 add_inferior (ptid_get_pid (inferior_ptid));
2518 /* Always add the main thread. */
2519 add_thread_silent (inferior_ptid);
2521 get_offsets (); /* Get text, data & bss offsets. */
2523 /* Use the previously fetched status. */
2524 gdb_assert (wait_status != NULL);
2525 strcpy (rs->buf, wait_status);
2526 rs->cached_wait_status = 1;
2529 start_remote (args->from_tty); /* Initialize gdb process mechanisms. */
2531 /* If we connected to a live target, do some additional setup. */
2532 if (target_has_execution)
2534 if (exec_bfd) /* No use without an exec file. */
2535 remote_check_symbols (symfile_objfile);
2539 /* Open a connection to a remote debugger.
2540 NAME is the filename used for communication. */
2543 remote_open (char *name, int from_tty)
2545 remote_open_1 (name, from_tty, &remote_ops, 0);
2548 /* Open a connection to a remote debugger using the extended
2549 remote gdb protocol. NAME is the filename used for communication. */
2552 extended_remote_open (char *name, int from_tty)
2554 remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */);
2557 /* Generic code for opening a connection to a remote target. */
2560 init_all_packet_configs (void)
2563 for (i = 0; i < PACKET_MAX; i++)
2564 update_packet_config (&remote_protocol_packets[i]);
2567 /* Symbol look-up. */
2570 remote_check_symbols (struct objfile *objfile)
2572 struct remote_state *rs = get_remote_state ();
2573 char *msg, *reply, *tmp;
2574 struct minimal_symbol *sym;
2577 if (remote_protocol_packets[PACKET_qSymbol].support == PACKET_DISABLE)
2580 /* Make sure the remote is pointing at the right process. */
2581 set_general_process ();
2583 /* Allocate a message buffer. We can't reuse the input buffer in RS,
2584 because we need both at the same time. */
2585 msg = alloca (get_remote_packet_size ());
2587 /* Invite target to request symbol lookups. */
2589 putpkt ("qSymbol::");
2590 getpkt (&rs->buf, &rs->buf_size, 0);
2591 packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSymbol]);
2594 while (strncmp (reply, "qSymbol:", 8) == 0)
2597 end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2);
2599 sym = lookup_minimal_symbol (msg, NULL, NULL);
2601 xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]);
2604 CORE_ADDR sym_addr = SYMBOL_VALUE_ADDRESS (sym);
2606 /* If this is a function address, return the start of code
2607 instead of any data function descriptor. */
2608 sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch,
2612 xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s",
2613 paddr_nz (sym_addr), &reply[8]);
2617 getpkt (&rs->buf, &rs->buf_size, 0);
2622 static struct serial *
2623 remote_serial_open (char *name)
2625 static int udp_warning = 0;
2627 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2628 of in ser-tcp.c, because it is the remote protocol assuming that the
2629 serial connection is reliable and not the serial connection promising
2631 if (!udp_warning && strncmp (name, "udp:", 4) == 0)
2634 The remote protocol may be unreliable over UDP.\n\
2635 Some events may be lost, rendering further debugging impossible."));
2639 return serial_open (name);
2642 /* This type describes each known response to the qSupported
2644 struct protocol_feature
2646 /* The name of this protocol feature. */
2649 /* The default for this protocol feature. */
2650 enum packet_support default_support;
2652 /* The function to call when this feature is reported, or after
2653 qSupported processing if the feature is not supported.
2654 The first argument points to this structure. The second
2655 argument indicates whether the packet requested support be
2656 enabled, disabled, or probed (or the default, if this function
2657 is being called at the end of processing and this feature was
2658 not reported). The third argument may be NULL; if not NULL, it
2659 is a NUL-terminated string taken from the packet following
2660 this feature's name and an equals sign. */
2661 void (*func) (const struct protocol_feature *, enum packet_support,
2664 /* The corresponding packet for this feature. Only used if
2665 FUNC is remote_supported_packet. */
2670 remote_supported_packet (const struct protocol_feature *feature,
2671 enum packet_support support,
2672 const char *argument)
2676 warning (_("Remote qSupported response supplied an unexpected value for"
2677 " \"%s\"."), feature->name);
2681 if (remote_protocol_packets[feature->packet].support
2682 == PACKET_SUPPORT_UNKNOWN)
2683 remote_protocol_packets[feature->packet].support = support;
2687 remote_packet_size (const struct protocol_feature *feature,
2688 enum packet_support support, const char *value)
2690 struct remote_state *rs = get_remote_state ();
2695 if (support != PACKET_ENABLE)
2698 if (value == NULL || *value == '\0')
2700 warning (_("Remote target reported \"%s\" without a size."),
2706 packet_size = strtol (value, &value_end, 16);
2707 if (errno != 0 || *value_end != '\0' || packet_size < 0)
2709 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
2710 feature->name, value);
2714 if (packet_size > MAX_REMOTE_PACKET_SIZE)
2716 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
2717 packet_size, MAX_REMOTE_PACKET_SIZE);
2718 packet_size = MAX_REMOTE_PACKET_SIZE;
2721 /* Record the new maximum packet size. */
2722 rs->explicit_packet_size = packet_size;
2726 remote_multi_process_feature (const struct protocol_feature *feature,
2727 enum packet_support support, const char *value)
2729 struct remote_state *rs = get_remote_state ();
2730 rs->multi_process_aware = (support == PACKET_ENABLE);
2733 static struct protocol_feature remote_protocol_features[] = {
2734 { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
2735 { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
2736 PACKET_qXfer_auxv },
2737 { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet,
2738 PACKET_qXfer_features },
2739 { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet,
2740 PACKET_qXfer_libraries },
2741 { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet,
2742 PACKET_qXfer_memory_map },
2743 { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet,
2744 PACKET_qXfer_spu_read },
2745 { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet,
2746 PACKET_qXfer_spu_write },
2747 { "QPassSignals", PACKET_DISABLE, remote_supported_packet,
2748 PACKET_QPassSignals },
2749 { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet,
2750 PACKET_QStartNoAckMode },
2751 { "multiprocess", PACKET_DISABLE, remote_multi_process_feature, -1 },
2755 remote_query_supported (void)
2757 struct remote_state *rs = get_remote_state ();
2760 unsigned char seen [ARRAY_SIZE (remote_protocol_features)];
2762 /* The packet support flags are handled differently for this packet
2763 than for most others. We treat an error, a disabled packet, and
2764 an empty response identically: any features which must be reported
2765 to be used will be automatically disabled. An empty buffer
2766 accomplishes this, since that is also the representation for a list
2767 containing no features. */
2770 if (remote_protocol_packets[PACKET_qSupported].support != PACKET_DISABLE)
2773 putpkt ("qSupported:multiprocess+");
2775 putpkt ("qSupported");
2777 getpkt (&rs->buf, &rs->buf_size, 0);
2779 /* If an error occured, warn, but do not return - just reset the
2780 buffer to empty and go on to disable features. */
2781 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported])
2784 warning (_("Remote failure reply: %s"), rs->buf);
2789 memset (seen, 0, sizeof (seen));
2794 enum packet_support is_supported;
2795 char *p, *end, *name_end, *value;
2797 /* First separate out this item from the rest of the packet. If
2798 there's another item after this, we overwrite the separator
2799 (terminated strings are much easier to work with). */
2801 end = strchr (p, ';');
2804 end = p + strlen (p);
2814 warning (_("empty item in \"qSupported\" response"));
2819 name_end = strchr (p, '=');
2822 /* This is a name=value entry. */
2823 is_supported = PACKET_ENABLE;
2824 value = name_end + 1;
2833 is_supported = PACKET_ENABLE;
2837 is_supported = PACKET_DISABLE;
2841 is_supported = PACKET_SUPPORT_UNKNOWN;
2845 warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p);
2851 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
2852 if (strcmp (remote_protocol_features[i].name, p) == 0)
2854 const struct protocol_feature *feature;
2857 feature = &remote_protocol_features[i];
2858 feature->func (feature, is_supported, value);
2863 /* If we increased the packet size, make sure to increase the global
2864 buffer size also. We delay this until after parsing the entire
2865 qSupported packet, because this is the same buffer we were
2867 if (rs->buf_size < rs->explicit_packet_size)
2869 rs->buf_size = rs->explicit_packet_size;
2870 rs->buf = xrealloc (rs->buf, rs->buf_size);
2873 /* Handle the defaults for unmentioned features. */
2874 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
2877 const struct protocol_feature *feature;
2879 feature = &remote_protocol_features[i];
2880 feature->func (feature, feature->default_support, NULL);
2886 remote_open_1 (char *name, int from_tty, struct target_ops *target, int extended_p)
2888 struct remote_state *rs = get_remote_state ();
2891 error (_("To open a remote debug connection, you need to specify what\n"
2892 "serial device is attached to the remote system\n"
2893 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
2895 /* See FIXME above. */
2896 if (!target_async_permitted)
2897 wait_forever_enabled_p = 1;
2899 /* If we're connected to a running target, target_preopen will kill it.
2900 But if we're connected to a target system with no running process,
2901 then we will still be connected when it returns. Ask this question
2902 first, before target_preopen has a chance to kill anything. */
2903 if (remote_desc != NULL && !target_has_execution)
2906 || query (_("Already connected to a remote target. Disconnect? ")))
2909 error (_("Still connected."));
2912 target_preopen (from_tty);
2914 unpush_target (target);
2916 /* This time without a query. If we were connected to an
2917 extended-remote target and target_preopen killed the running
2918 process, we may still be connected. If we are starting "target
2919 remote" now, the extended-remote target will not have been
2920 removed by unpush_target. */
2921 if (remote_desc != NULL && !target_has_execution)
2924 /* Make sure we send the passed signals list the next time we resume. */
2925 xfree (last_pass_packet);
2926 last_pass_packet = NULL;
2928 remote_fileio_reset ();
2929 reopen_exec_file ();
2932 remote_desc = remote_serial_open (name);
2934 perror_with_name (name);
2936 if (baud_rate != -1)
2938 if (serial_setbaudrate (remote_desc, baud_rate))
2940 /* The requested speed could not be set. Error out to
2941 top level after closing remote_desc. Take care to
2942 set remote_desc to NULL to avoid closing remote_desc
2944 serial_close (remote_desc);
2946 perror_with_name (name);
2950 serial_raw (remote_desc);
2952 /* If there is something sitting in the buffer we might take it as a
2953 response to a command, which would be bad. */
2954 serial_flush_input (remote_desc);
2958 puts_filtered ("Remote debugging using ");
2959 puts_filtered (name);
2960 puts_filtered ("\n");
2962 push_target (target); /* Switch to using remote target now. */
2964 /* Assume that the target is running, unless we learn otherwise. */
2965 target_mark_running (target);
2967 /* Reset the target state; these things will be queried either by
2968 remote_query_supported or as they are needed. */
2969 init_all_packet_configs ();
2970 rs->explicit_packet_size = 0;
2972 rs->multi_process_aware = 0;
2973 rs->extended = extended_p;
2974 rs->waiting_for_stop_reply = 0;
2976 general_thread = not_sent_ptid;
2977 continue_thread = not_sent_ptid;
2979 /* Probe for ability to use "ThreadInfo" query, as required. */
2980 use_threadinfo_query = 1;
2981 use_threadextra_query = 1;
2983 if (target_async_permitted)
2985 /* With this target we start out by owning the terminal. */
2986 remote_async_terminal_ours_p = 1;
2988 /* FIXME: cagney/1999-09-23: During the initial connection it is
2989 assumed that the target is already ready and able to respond to
2990 requests. Unfortunately remote_start_remote() eventually calls
2991 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2992 around this. Eventually a mechanism that allows
2993 wait_for_inferior() to expect/get timeouts will be
2995 wait_forever_enabled_p = 0;
2998 /* First delete any symbols previously loaded from shared libraries. */
2999 no_shared_libraries (NULL, 0);
3001 /* Start the remote connection. If error() or QUIT, discard this
3002 target (we'd otherwise be in an inconsistent state) and then
3003 propogate the error on up the exception chain. This ensures that
3004 the caller doesn't stumble along blindly assuming that the
3005 function succeeded. The CLI doesn't have this problem but other
3006 UI's, such as MI do.
3008 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
3009 this function should return an error indication letting the
3010 caller restore the previous state. Unfortunately the command
3011 ``target remote'' is directly wired to this function making that
3012 impossible. On a positive note, the CLI side of this problem has
3013 been fixed - the function set_cmd_context() makes it possible for
3014 all the ``target ....'' commands to share a common callback
3015 function. See cli-dump.c. */
3017 struct gdb_exception ex;
3018 struct start_remote_args args;
3020 args.from_tty = from_tty;
3021 args.target = target;
3022 args.extended_p = extended_p;
3024 ex = catch_exception (uiout, remote_start_remote, &args, RETURN_MASK_ALL);
3027 /* Pop the partially set up target - unless something else did
3028 already before throwing the exception. */
3029 if (remote_desc != NULL)
3031 if (target_async_permitted)
3032 wait_forever_enabled_p = 1;
3033 throw_exception (ex);
3037 if (target_async_permitted)
3038 wait_forever_enabled_p = 1;
3041 /* This takes a program previously attached to and detaches it. After
3042 this is done, GDB can be used to debug some other program. We
3043 better not have left any breakpoints in the target program or it'll
3044 die when it hits one. */
3047 remote_detach_1 (char *args, int from_tty, int extended)
3049 int pid = ptid_get_pid (inferior_ptid);
3050 struct remote_state *rs = get_remote_state ();
3053 error (_("Argument given to \"detach\" when remotely debugging."));
3055 if (!target_has_execution)
3056 error (_("No process to detach from."));
3058 /* Tell the remote target to detach. */
3059 if (remote_multi_process_p (rs))
3060 sprintf (rs->buf, "D;%x", pid);
3062 strcpy (rs->buf, "D");
3065 getpkt (&rs->buf, &rs->buf_size, 0);
3067 if (rs->buf[0] == 'O' && rs->buf[1] == 'K')
3069 else if (rs->buf[0] == '\0')
3070 error (_("Remote doesn't know how to detach"));
3072 error (_("Can't detach process."));
3076 if (remote_multi_process_p (rs))
3077 printf_filtered (_("Detached from remote %s.\n"),
3078 target_pid_to_str (pid_to_ptid (pid)));
3082 puts_filtered (_("Detached from remote process.\n"));
3084 puts_filtered (_("Ending remote debugging.\n"));
3088 detach_inferior (pid);
3089 target_mourn_inferior ();
3093 remote_detach (char *args, int from_tty)
3095 remote_detach_1 (args, from_tty, 0);
3099 extended_remote_detach (char *args, int from_tty)
3101 remote_detach_1 (args, from_tty, 1);
3104 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
3107 remote_disconnect (struct target_ops *target, char *args, int from_tty)
3110 error (_("Argument given to \"disconnect\" when remotely debugging."));
3112 /* Make sure we unpush even the extended remote targets; mourn
3113 won't do it. So call remote_mourn_1 directly instead of
3114 target_mourn_inferior. */
3115 remote_mourn_1 (target);
3118 puts_filtered ("Ending remote debugging.\n");
3121 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
3122 be chatty about it. */
3125 extended_remote_attach_1 (struct target_ops *target, char *args, int from_tty)
3127 struct remote_state *rs = get_remote_state ();
3130 char *wait_status = NULL;
3131 struct inferior *inf;
3134 error_no_arg (_("process-id to attach"));
3137 pid = strtol (args, &dummy, 0);
3138 /* Some targets don't set errno on errors, grrr! */
3139 if (pid == 0 && args == dummy)
3140 error (_("Illegal process-id: %s."), args);
3142 if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE)
3143 error (_("This target does not support attaching to a process"));
3145 sprintf (rs->buf, "vAttach;%x", pid);
3147 getpkt (&rs->buf, &rs->buf_size, 0);
3149 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vAttach]) == PACKET_OK)
3152 printf_unfiltered (_("Attached to %s\n"),
3153 target_pid_to_str (pid_to_ptid (pid)));
3155 /* Save the reply for later. */
3156 wait_status = alloca (strlen (rs->buf) + 1);
3157 strcpy (wait_status, rs->buf);
3159 else if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE)
3160 error (_("This target does not support attaching to a process"));
3162 error (_("Attaching to %s failed"),
3163 target_pid_to_str (pid_to_ptid (pid)));
3165 target_mark_running (target);
3166 inferior_ptid = pid_to_ptid (pid);
3168 /* Now, if we have thread information, update inferior_ptid. */
3169 inferior_ptid = remote_current_thread (inferior_ptid);
3171 inf = add_inferior (pid);
3172 inf->attach_flag = 1;
3174 /* Now, add the main thread to the thread list. */
3175 add_thread_silent (inferior_ptid);
3177 /* Next, if the target can specify a description, read it. We do
3178 this before anything involving memory or registers. */
3179 target_find_description ();
3181 /* Use the previously fetched status. */
3182 gdb_assert (wait_status != NULL);
3183 strcpy (rs->buf, wait_status);
3184 rs->cached_wait_status = 1;
3188 extended_remote_attach (char *args, int from_tty)
3190 extended_remote_attach_1 (&extended_remote_ops, args, from_tty);
3193 /* Convert hex digit A to a number. */
3198 if (a >= '0' && a <= '9')
3200 else if (a >= 'a' && a <= 'f')
3201 return a - 'a' + 10;
3202 else if (a >= 'A' && a <= 'F')
3203 return a - 'A' + 10;
3205 error (_("Reply contains invalid hex digit %d"), a);
3209 hex2bin (const char *hex, gdb_byte *bin, int count)
3213 for (i = 0; i < count; i++)
3215 if (hex[0] == 0 || hex[1] == 0)
3217 /* Hex string is short, or of uneven length.
3218 Return the count that has been converted so far. */
3221 *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]);
3227 /* Convert number NIB to a hex digit. */
3235 return 'a' + nib - 10;
3239 bin2hex (const gdb_byte *bin, char *hex, int count)
3242 /* May use a length, or a nul-terminated string as input. */
3244 count = strlen ((char *) bin);
3246 for (i = 0; i < count; i++)
3248 *hex++ = tohex ((*bin >> 4) & 0xf);
3249 *hex++ = tohex (*bin++ & 0xf);
3255 /* Check for the availability of vCont. This function should also check
3259 remote_vcont_probe (struct remote_state *rs)
3263 strcpy (rs->buf, "vCont?");
3265 getpkt (&rs->buf, &rs->buf_size, 0);
3268 /* Make sure that the features we assume are supported. */
3269 if (strncmp (buf, "vCont", 5) == 0)
3272 int support_s, support_S, support_c, support_C;
3278 while (p && *p == ';')
3281 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
3283 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
3285 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
3287 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
3290 p = strchr (p, ';');
3293 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
3294 BUF will make packet_ok disable the packet. */
3295 if (!support_s || !support_S || !support_c || !support_C)
3299 packet_ok (buf, &remote_protocol_packets[PACKET_vCont]);
3302 /* Resume the remote inferior by using a "vCont" packet. The thread
3303 to be resumed is PTID; STEP and SIGGNAL indicate whether the
3304 resumed thread should be single-stepped and/or signalled. If PTID
3305 equals minus_one_ptid, then all threads are resumed; the thread to
3306 be stepped and/or signalled is given in the global INFERIOR_PTID.
3307 This function returns non-zero iff it resumes the inferior.
3309 This function issues a strict subset of all possible vCont commands at the
3313 remote_vcont_resume (ptid_t ptid, int step, enum target_signal siggnal)
3315 struct remote_state *rs = get_remote_state ();
3319 if (remote_protocol_packets[PACKET_vCont].support == PACKET_SUPPORT_UNKNOWN)
3320 remote_vcont_probe (rs);
3322 if (remote_protocol_packets[PACKET_vCont].support == PACKET_DISABLE)
3326 endp = rs->buf + get_remote_packet_size ();
3328 /* If we could generate a wider range of packets, we'd have to worry
3329 about overflowing BUF. Should there be a generic
3330 "multi-part-packet" packet? */
3332 if (ptid_equal (ptid, magic_null_ptid))
3334 /* MAGIC_NULL_PTID means that we don't have any active threads,
3335 so we don't have any TID numbers the inferior will
3336 understand. Make sure to only send forms that do not specify
3338 if (step && siggnal != TARGET_SIGNAL_0)
3339 xsnprintf (p, endp - p, "vCont;S%02x", siggnal);
3341 xsnprintf (p, endp - p, "vCont;s");
3342 else if (siggnal != TARGET_SIGNAL_0)
3343 xsnprintf (p, endp - p, "vCont;C%02x", siggnal);
3345 xsnprintf (p, endp - p, "vCont;c");
3347 else if (ptid_equal (ptid, minus_one_ptid))
3349 /* Resume all threads, with preference for INFERIOR_PTID. */
3350 if (step && siggnal != TARGET_SIGNAL_0)
3352 /* Step inferior_ptid with signal. */
3353 p += xsnprintf (p, endp - p, "vCont;S%02x:", siggnal);
3354 p = write_ptid (p, endp, inferior_ptid);
3355 /* And continue others. */
3356 p += xsnprintf (p, endp - p, ";c");
3360 /* Step inferior_ptid. */
3361 p += xsnprintf (p, endp - p, "vCont;s:");
3362 p = write_ptid (p, endp, inferior_ptid);
3363 /* And continue others. */
3364 p += xsnprintf (p, endp - p, ";c");
3366 else if (siggnal != TARGET_SIGNAL_0)
3368 /* Continue inferior_ptid with signal. */
3369 p += xsnprintf (p, endp - p, "vCont;C%02x:", siggnal);
3370 p = write_ptid (p, endp, inferior_ptid);
3371 /* And continue others. */
3372 p += xsnprintf (p, endp - p, ";c");
3375 xsnprintf (p, endp - p, "vCont;c");
3379 /* Scheduler locking; resume only PTID. */
3380 if (step && siggnal != TARGET_SIGNAL_0)
3382 /* Step ptid with signal. */
3383 p += xsnprintf (p, endp - p, "vCont;S%02x:", siggnal);
3384 p = write_ptid (p, endp, ptid);
3389 p += xsnprintf (p, endp - p, "vCont;s:");
3390 p = write_ptid (p, endp, ptid);
3392 else if (siggnal != TARGET_SIGNAL_0)
3394 /* Continue ptid with signal. */
3395 p += xsnprintf (p, endp - p, "vCont;C%02x:", siggnal);
3396 p = write_ptid (p, endp, ptid);
3400 /* Continue ptid. */
3401 p += xsnprintf (p, endp - p, "vCont;c:");
3402 p = write_ptid (p, endp, ptid);
3406 gdb_assert (strlen (rs->buf) < get_remote_packet_size ());
3412 /* Tell the remote machine to resume. */
3414 static enum target_signal last_sent_signal = TARGET_SIGNAL_0;
3416 static int last_sent_step;
3419 remote_resume (ptid_t ptid, int step, enum target_signal siggnal)
3421 struct remote_state *rs = get_remote_state ();
3424 last_sent_signal = siggnal;
3425 last_sent_step = step;
3427 /* Update the inferior on signals to silently pass, if they've changed. */
3428 remote_pass_signals ();
3430 /* The vCont packet doesn't need to specify threads via Hc. */
3431 if (remote_vcont_resume (ptid, step, siggnal))
3434 /* All other supported resume packets do use Hc, so set the continue
3436 if (ptid_equal (ptid, minus_one_ptid))
3437 set_continue_thread (any_thread_ptid);
3439 set_continue_thread (ptid);
3442 if (siggnal != TARGET_SIGNAL_0)
3444 buf[0] = step ? 'S' : 'C';
3445 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
3446 buf[2] = tohex (((int) siggnal) & 0xf);
3450 strcpy (buf, step ? "s" : "c");
3455 /* We are about to start executing the inferior, let's register it
3456 with the event loop. NOTE: this is the one place where all the
3457 execution commands end up. We could alternatively do this in each
3458 of the execution commands in infcmd.c. */
3459 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
3460 into infcmd.c in order to allow inferior function calls to work
3461 NOT asynchronously. */
3462 if (target_can_async_p ())
3463 target_async (inferior_event_handler, 0);
3465 /* We've just told the target to resume. The remote server will
3466 wait for the inferior to stop, and then send a stop reply. In
3467 the mean time, we can't start another command/query ourselves
3468 because the stub wouldn't be ready to process it. */
3469 rs->waiting_for_stop_reply = 1;
3473 /* Set up the signal handler for SIGINT, while the target is
3474 executing, ovewriting the 'regular' SIGINT signal handler. */
3476 initialize_sigint_signal_handler (void)
3478 signal (SIGINT, handle_remote_sigint);
3481 /* Signal handler for SIGINT, while the target is executing. */
3483 handle_remote_sigint (int sig)
3485 signal (sig, handle_remote_sigint_twice);
3486 mark_async_signal_handler_wrapper (sigint_remote_token);
3489 /* Signal handler for SIGINT, installed after SIGINT has already been
3490 sent once. It will take effect the second time that the user sends
3493 handle_remote_sigint_twice (int sig)
3495 signal (sig, handle_remote_sigint);
3496 mark_async_signal_handler_wrapper (sigint_remote_twice_token);
3499 /* Perform the real interruption of the target execution, in response
3502 async_remote_interrupt (gdb_client_data arg)
3505 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
3507 target_stop (inferior_ptid);
3510 /* Perform interrupt, if the first attempt did not succeed. Just give
3511 up on the target alltogether. */
3513 async_remote_interrupt_twice (gdb_client_data arg)
3516 fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n");
3521 /* Reinstall the usual SIGINT handlers, after the target has
3524 cleanup_sigint_signal_handler (void *dummy)
3526 signal (SIGINT, handle_sigint);
3529 /* Send ^C to target to halt it. Target will respond, and send us a
3531 static void (*ofunc) (int);
3533 /* The command line interface's stop routine. This function is installed
3534 as a signal handler for SIGINT. The first time a user requests a
3535 stop, we call remote_stop to send a break or ^C. If there is no
3536 response from the target (it didn't stop when the user requested it),
3537 we ask the user if he'd like to detach from the target. */
3539 remote_interrupt (int signo)
3541 /* If this doesn't work, try more severe steps. */
3542 signal (signo, remote_interrupt_twice);
3544 gdb_call_async_signal_handler (sigint_remote_token, 1);
3547 /* The user typed ^C twice. */
3550 remote_interrupt_twice (int signo)
3552 signal (signo, ofunc);
3553 gdb_call_async_signal_handler (sigint_remote_twice_token, 1);
3554 signal (signo, remote_interrupt);
3557 /* This is the generic stop called via the target vector. When a target
3558 interrupt is requested, either by the command line or the GUI, we
3559 will eventually end up here. */
3561 remote_stop (ptid_t ptid)
3563 /* Send a break or a ^C, depending on user preference. */
3565 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
3568 serial_send_break (remote_desc);
3570 serial_write (remote_desc, "\003", 1);
3573 /* Ask the user what to do when an interrupt is received. */
3576 interrupt_query (void)
3578 target_terminal_ours ();
3580 if (query ("Interrupted while waiting for the program.\n\
3581 Give up (and stop debugging it)? "))
3584 deprecated_throw_reason (RETURN_QUIT);
3587 target_terminal_inferior ();
3590 /* Enable/disable target terminal ownership. Most targets can use
3591 terminal groups to control terminal ownership. Remote targets are
3592 different in that explicit transfer of ownership to/from GDB/target
3596 remote_terminal_inferior (void)
3598 if (!target_async_permitted)
3599 /* Nothing to do. */
3602 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
3603 sync_execution here. This function should only be called when
3604 GDB is resuming the inferior in the forground. A background
3605 resume (``run&'') should leave GDB in control of the terminal and
3606 consequently should not call this code. */
3607 if (!sync_execution)
3609 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
3610 calls target_terminal_*() idenpotent. The event-loop GDB talking
3611 to an asynchronous target with a synchronous command calls this
3612 function from both event-top.c and infrun.c/infcmd.c. Once GDB
3613 stops trying to transfer the terminal to the target when it
3614 shouldn't this guard can go away. */
3615 if (!remote_async_terminal_ours_p)
3617 delete_file_handler (input_fd);
3618 remote_async_terminal_ours_p = 0;
3619 initialize_sigint_signal_handler ();
3620 /* NOTE: At this point we could also register our selves as the
3621 recipient of all input. Any characters typed could then be
3622 passed on down to the target. */
3626 remote_terminal_ours (void)
3628 if (!target_async_permitted)
3629 /* Nothing to do. */
3632 /* See FIXME in remote_terminal_inferior. */
3633 if (!sync_execution)
3635 /* See FIXME in remote_terminal_inferior. */
3636 if (remote_async_terminal_ours_p)
3638 cleanup_sigint_signal_handler (NULL);
3639 add_file_handler (input_fd, stdin_event_handler, 0);
3640 remote_async_terminal_ours_p = 1;
3644 remote_console_output (char *msg)
3648 for (p = msg; p[0] && p[1]; p += 2)
3651 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
3654 fputs_unfiltered (tb, gdb_stdtarg);
3656 gdb_flush (gdb_stdtarg);
3659 /* Wait until the remote machine stops, then return,
3660 storing status in STATUS just as `wait' would. */
3663 remote_wait_as (ptid_t ptid, struct target_waitstatus *status)
3665 struct remote_state *rs = get_remote_state ();
3666 struct remote_arch_state *rsa = get_remote_arch_state ();
3667 ptid_t event_ptid = null_ptid;
3669 int solibs_changed = 0;
3672 status->kind = TARGET_WAITKIND_IGNORE;
3673 status->value.integer = 0;
3675 if (rs->cached_wait_status)
3676 /* Use the cached wait status, but only once. */
3677 rs->cached_wait_status = 0;
3680 if (!target_is_async_p ())
3682 ofunc = signal (SIGINT, remote_interrupt);
3683 /* If the user hit C-c before this packet, or between
3684 packets, pretend that it was hit right here. */
3688 remote_interrupt (SIGINT);
3691 /* FIXME: cagney/1999-09-27: If we're in async mode we should
3692 _never_ wait for ever -> test on target_is_async_p().
3693 However, before we do that we need to ensure that the caller
3694 knows how to take the target into/out of async mode. */
3695 getpkt (&rs->buf, &rs->buf_size, wait_forever_enabled_p);
3696 if (!target_is_async_p ())
3697 signal (SIGINT, ofunc);
3702 remote_stopped_by_watchpoint_p = 0;
3704 /* We got something. */
3705 rs->waiting_for_stop_reply = 0;
3709 case 'E': /* Error of some sort. */
3710 /* We're out of sync with the target now. Did it continue or
3711 not? Not is more likely, so report a stop. */
3712 warning (_("Remote failure reply: %s"), buf);
3713 status->kind = TARGET_WAITKIND_STOPPED;
3714 status->value.sig = TARGET_SIGNAL_0;
3716 case 'F': /* File-I/O request. */
3717 remote_fileio_request (buf);
3719 /* This stop reply is special. We reply back to the stub,
3720 and keep waiting for the target to stop. */
3721 rs->waiting_for_stop_reply = 1;
3723 case 'T': /* Status with PC, SP, FP, ... */
3725 gdb_byte regs[MAX_REGISTER_SIZE];
3727 /* Expedited reply, containing Signal, {regno, reg} repeat. */
3728 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3730 n... = register number
3731 r... = register contents
3733 p = &buf[3]; /* after Txx */
3742 /* If the packet contains a register number, save it in
3743 pnum and set p1 to point to the character following it.
3744 Otherwise p1 points to p. */
3746 /* If this packet is an awatch packet, don't parse the
3747 'a' as a register number. */
3749 if (strncmp (p, "awatch", strlen("awatch")) != 0)
3751 /* Read the ``P'' register number. */
3752 pnum = strtol (p, &p_temp, 16);
3758 if (p1 == p) /* No register number present here. */
3760 p1 = strchr (p, ':');
3762 error (_("Malformed packet(a) (missing colon): %s\n\
3765 if (strncmp (p, "thread", p1 - p) == 0)
3766 event_ptid = read_ptid (++p1, &p);
3767 else if ((strncmp (p, "watch", p1 - p) == 0)
3768 || (strncmp (p, "rwatch", p1 - p) == 0)
3769 || (strncmp (p, "awatch", p1 - p) == 0))
3771 remote_stopped_by_watchpoint_p = 1;
3772 p = unpack_varlen_hex (++p1, &addr);
3773 remote_watch_data_address = (CORE_ADDR)addr;
3775 else if (strncmp (p, "library", p1 - p) == 0)
3779 while (*p_temp && *p_temp != ';')
3787 /* Silently skip unknown optional info. */
3788 p_temp = strchr (p1 + 1, ';');
3795 struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum);
3799 error (_("Malformed packet(b) (missing colon): %s\n\
3805 error (_("Remote sent bad register number %s: %s\n\
3807 phex_nz (pnum, 0), p, buf);
3809 fieldsize = hex2bin (p, regs,
3810 register_size (target_gdbarch,
3813 if (fieldsize < register_size (target_gdbarch,
3815 warning (_("Remote reply is too short: %s"), buf);
3816 regcache_raw_supply (get_current_regcache (),
3821 error (_("Remote register badly formatted: %s\nhere: %s"),
3827 case 'S': /* Old style status, just signal only. */
3829 status->kind = TARGET_WAITKIND_LOADED;
3832 status->kind = TARGET_WAITKIND_STOPPED;
3833 status->value.sig = (enum target_signal)
3834 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3837 case 'W': /* Target exited. */
3844 /* GDB used to accept only 2 hex chars here. Stubs should
3845 only send more if they detect GDB supports multi-process
3847 p = unpack_varlen_hex (&buf[1], &value);
3851 /* The remote process exited. */
3852 status->kind = TARGET_WAITKIND_EXITED;
3853 status->value.integer = value;
3857 /* The remote process exited with a signal. */
3858 status->kind = TARGET_WAITKIND_SIGNALLED;
3859 status->value.sig = (enum target_signal) value;
3862 /* If no process is specified, assume inferior_ptid. */
3863 pid = ptid_get_pid (inferior_ptid);
3872 else if (strncmp (p,
3873 "process:", sizeof ("process:") - 1) == 0)
3876 p += sizeof ("process:") - 1;
3877 unpack_varlen_hex (p, &upid);
3881 error (_("unknown stop reply packet: %s"), buf);
3884 error (_("unknown stop reply packet: %s"), buf);
3885 event_ptid = pid_to_ptid (pid);
3888 case 'O': /* Console output. */
3889 remote_console_output (buf + 1);
3891 /* The target didn't really stop; keep waiting. */
3892 rs->waiting_for_stop_reply = 1;
3896 if (last_sent_signal != TARGET_SIGNAL_0)
3898 /* Zero length reply means that we tried 'S' or 'C' and the
3899 remote system doesn't support it. */
3900 target_terminal_ours_for_output ();
3902 ("Can't send signals to this remote system. %s not sent.\n",
3903 target_signal_to_name (last_sent_signal));
3904 last_sent_signal = TARGET_SIGNAL_0;
3905 target_terminal_inferior ();
3907 strcpy ((char *) buf, last_sent_step ? "s" : "c");
3908 putpkt ((char *) buf);
3910 /* We just told the target to resume, so a stop reply is in
3912 rs->waiting_for_stop_reply = 1;
3915 /* else fallthrough */
3917 warning (_("Invalid remote reply: %s"), buf);
3919 rs->waiting_for_stop_reply = 1;
3923 /* Nothing interesting happened. */
3924 if (status->kind == TARGET_WAITKIND_IGNORE)
3925 return minus_one_ptid;
3927 if (status->kind == TARGET_WAITKIND_EXITED
3928 || status->kind == TARGET_WAITKIND_SIGNALLED)
3930 int pid = ptid_get_pid (event_ptid);
3931 delete_inferior (pid);
3935 if (!ptid_equal (event_ptid, null_ptid))
3936 record_currthread (event_ptid);
3938 event_ptid = inferior_ptid;
3945 remote_wait (ptid_t ptid, struct target_waitstatus *status)
3949 /* In synchronous mode, keep waiting until the target stops. In
3950 asynchronous mode, always return to the event loop. */
3954 event_ptid = remote_wait_as (ptid, status);
3956 while (status->kind == TARGET_WAITKIND_IGNORE
3957 && !target_can_async_p ());
3962 /* Fetch a single register using a 'p' packet. */
3965 fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg)
3967 struct remote_state *rs = get_remote_state ();
3969 char regp[MAX_REGISTER_SIZE];
3972 if (remote_protocol_packets[PACKET_p].support == PACKET_DISABLE)
3975 if (reg->pnum == -1)
3980 p += hexnumstr (p, reg->pnum);
3982 remote_send (&rs->buf, &rs->buf_size);
3986 switch (packet_ok (buf, &remote_protocol_packets[PACKET_p]))
3990 case PACKET_UNKNOWN:
3993 error (_("Could not fetch register \"%s\""),
3994 gdbarch_register_name (get_regcache_arch (regcache), reg->regnum));
3997 /* If this register is unfetchable, tell the regcache. */
4000 regcache_raw_supply (regcache, reg->regnum, NULL);
4004 /* Otherwise, parse and supply the value. */
4010 error (_("fetch_register_using_p: early buf termination"));
4012 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
4015 regcache_raw_supply (regcache, reg->regnum, regp);
4019 /* Fetch the registers included in the target's 'g' packet. */
4022 send_g_packet (void)
4024 struct remote_state *rs = get_remote_state ();
4029 sprintf (rs->buf, "g");
4030 remote_send (&rs->buf, &rs->buf_size);
4032 /* We can get out of synch in various cases. If the first character
4033 in the buffer is not a hex character, assume that has happened
4034 and try to fetch another packet to read. */
4035 while ((rs->buf[0] < '0' || rs->buf[0] > '9')
4036 && (rs->buf[0] < 'A' || rs->buf[0] > 'F')
4037 && (rs->buf[0] < 'a' || rs->buf[0] > 'f')
4038 && rs->buf[0] != 'x') /* New: unavailable register value. */
4041 fprintf_unfiltered (gdb_stdlog,
4042 "Bad register packet; fetching a new packet\n");
4043 getpkt (&rs->buf, &rs->buf_size, 0);
4046 buf_len = strlen (rs->buf);
4048 /* Sanity check the received packet. */
4049 if (buf_len % 2 != 0)
4050 error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf);
4056 process_g_packet (struct regcache *regcache)
4058 struct gdbarch *gdbarch = get_regcache_arch (regcache);
4059 struct remote_state *rs = get_remote_state ();
4060 struct remote_arch_state *rsa = get_remote_arch_state ();
4065 buf_len = strlen (rs->buf);
4067 /* Further sanity checks, with knowledge of the architecture. */
4068 if (buf_len > 2 * rsa->sizeof_g_packet)
4069 error (_("Remote 'g' packet reply is too long: %s"), rs->buf);
4071 /* Save the size of the packet sent to us by the target. It is used
4072 as a heuristic when determining the max size of packets that the
4073 target can safely receive. */
4074 if (rsa->actual_register_packet_size == 0)
4075 rsa->actual_register_packet_size = buf_len;
4077 /* If this is smaller than we guessed the 'g' packet would be,
4078 update our records. A 'g' reply that doesn't include a register's
4079 value implies either that the register is not available, or that
4080 the 'p' packet must be used. */
4081 if (buf_len < 2 * rsa->sizeof_g_packet)
4083 rsa->sizeof_g_packet = buf_len / 2;
4085 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
4087 if (rsa->regs[i].pnum == -1)
4090 if (rsa->regs[i].offset >= rsa->sizeof_g_packet)
4091 rsa->regs[i].in_g_packet = 0;
4093 rsa->regs[i].in_g_packet = 1;
4097 regs = alloca (rsa->sizeof_g_packet);
4099 /* Unimplemented registers read as all bits zero. */
4100 memset (regs, 0, rsa->sizeof_g_packet);
4102 /* Reply describes registers byte by byte, each byte encoded as two
4103 hex characters. Suck them all up, then supply them to the
4104 register cacheing/storage mechanism. */
4107 for (i = 0; i < rsa->sizeof_g_packet; i++)
4109 if (p[0] == 0 || p[1] == 0)
4110 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
4111 internal_error (__FILE__, __LINE__,
4112 "unexpected end of 'g' packet reply");
4114 if (p[0] == 'x' && p[1] == 'x')
4115 regs[i] = 0; /* 'x' */
4117 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
4123 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
4125 struct packet_reg *r = &rsa->regs[i];
4128 if (r->offset * 2 >= strlen (rs->buf))
4129 /* This shouldn't happen - we adjusted in_g_packet above. */
4130 internal_error (__FILE__, __LINE__,
4131 "unexpected end of 'g' packet reply");
4132 else if (rs->buf[r->offset * 2] == 'x')
4134 gdb_assert (r->offset * 2 < strlen (rs->buf));
4135 /* The register isn't available, mark it as such (at
4136 the same time setting the value to zero). */
4137 regcache_raw_supply (regcache, r->regnum, NULL);
4140 regcache_raw_supply (regcache, r->regnum,
4148 fetch_registers_using_g (struct regcache *regcache)
4151 process_g_packet (regcache);
4155 remote_fetch_registers (struct regcache *regcache, int regnum)
4157 struct remote_state *rs = get_remote_state ();
4158 struct remote_arch_state *rsa = get_remote_arch_state ();
4161 set_general_thread (inferior_ptid);
4165 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
4166 gdb_assert (reg != NULL);
4168 /* If this register might be in the 'g' packet, try that first -
4169 we are likely to read more than one register. If this is the
4170 first 'g' packet, we might be overly optimistic about its
4171 contents, so fall back to 'p'. */
4172 if (reg->in_g_packet)
4174 fetch_registers_using_g (regcache);
4175 if (reg->in_g_packet)
4179 if (fetch_register_using_p (regcache, reg))
4182 /* This register is not available. */
4183 regcache_raw_supply (regcache, reg->regnum, NULL);
4188 fetch_registers_using_g (regcache);
4190 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
4191 if (!rsa->regs[i].in_g_packet)
4192 if (!fetch_register_using_p (regcache, &rsa->regs[i]))
4194 /* This register is not available. */
4195 regcache_raw_supply (regcache, i, NULL);
4199 /* Prepare to store registers. Since we may send them all (using a
4200 'G' request), we have to read out the ones we don't want to change
4204 remote_prepare_to_store (struct regcache *regcache)
4206 struct remote_arch_state *rsa = get_remote_arch_state ();
4208 gdb_byte buf[MAX_REGISTER_SIZE];
4210 /* Make sure the entire registers array is valid. */
4211 switch (remote_protocol_packets[PACKET_P].support)
4213 case PACKET_DISABLE:
4214 case PACKET_SUPPORT_UNKNOWN:
4215 /* Make sure all the necessary registers are cached. */
4216 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
4217 if (rsa->regs[i].in_g_packet)
4218 regcache_raw_read (regcache, rsa->regs[i].regnum, buf);
4225 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
4226 packet was not recognized. */
4229 store_register_using_P (const struct regcache *regcache, struct packet_reg *reg)
4231 struct gdbarch *gdbarch = get_regcache_arch (regcache);
4232 struct remote_state *rs = get_remote_state ();
4233 struct remote_arch_state *rsa = get_remote_arch_state ();
4234 /* Try storing a single register. */
4235 char *buf = rs->buf;
4236 gdb_byte regp[MAX_REGISTER_SIZE];
4239 if (remote_protocol_packets[PACKET_P].support == PACKET_DISABLE)
4242 if (reg->pnum == -1)
4245 xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0));
4246 p = buf + strlen (buf);
4247 regcache_raw_collect (regcache, reg->regnum, regp);
4248 bin2hex (regp, p, register_size (gdbarch, reg->regnum));
4249 remote_send (&rs->buf, &rs->buf_size);
4251 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P]))
4256 error (_("Could not write register \"%s\""),
4257 gdbarch_register_name (gdbarch, reg->regnum));
4258 case PACKET_UNKNOWN:
4261 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
4265 /* Store register REGNUM, or all registers if REGNUM == -1, from the
4266 contents of the register cache buffer. FIXME: ignores errors. */
4269 store_registers_using_G (const struct regcache *regcache)
4271 struct remote_state *rs = get_remote_state ();
4272 struct remote_arch_state *rsa = get_remote_arch_state ();
4276 /* Extract all the registers in the regcache copying them into a
4280 regs = alloca (rsa->sizeof_g_packet);
4281 memset (regs, 0, rsa->sizeof_g_packet);
4282 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
4284 struct packet_reg *r = &rsa->regs[i];
4286 regcache_raw_collect (regcache, r->regnum, regs + r->offset);
4290 /* Command describes registers byte by byte,
4291 each byte encoded as two hex characters. */
4294 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
4296 bin2hex (regs, p, rsa->sizeof_g_packet);
4297 remote_send (&rs->buf, &rs->buf_size);
4300 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
4301 of the register cache buffer. FIXME: ignores errors. */
4304 remote_store_registers (struct regcache *regcache, int regnum)
4306 struct remote_state *rs = get_remote_state ();
4307 struct remote_arch_state *rsa = get_remote_arch_state ();
4310 set_general_thread (inferior_ptid);
4314 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
4315 gdb_assert (reg != NULL);
4317 /* Always prefer to store registers using the 'P' packet if
4318 possible; we often change only a small number of registers.
4319 Sometimes we change a larger number; we'd need help from a
4320 higher layer to know to use 'G'. */
4321 if (store_register_using_P (regcache, reg))
4324 /* For now, don't complain if we have no way to write the
4325 register. GDB loses track of unavailable registers too
4326 easily. Some day, this may be an error. We don't have
4327 any way to read the register, either... */
4328 if (!reg->in_g_packet)
4331 store_registers_using_G (regcache);
4335 store_registers_using_G (regcache);
4337 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
4338 if (!rsa->regs[i].in_g_packet)
4339 if (!store_register_using_P (regcache, &rsa->regs[i]))
4340 /* See above for why we do not issue an error here. */
4345 /* Return the number of hex digits in num. */
4348 hexnumlen (ULONGEST num)
4352 for (i = 0; num != 0; i++)
4358 /* Set BUF to the minimum number of hex digits representing NUM. */
4361 hexnumstr (char *buf, ULONGEST num)
4363 int len = hexnumlen (num);
4364 return hexnumnstr (buf, num, len);
4368 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
4371 hexnumnstr (char *buf, ULONGEST num, int width)
4377 for (i = width - 1; i >= 0; i--)
4379 buf[i] = "0123456789abcdef"[(num & 0xf)];
4386 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
4389 remote_address_masked (CORE_ADDR addr)
4391 int address_size = remote_address_size;
4392 /* If "remoteaddresssize" was not set, default to target address size. */
4394 address_size = gdbarch_addr_bit (target_gdbarch);
4396 if (address_size > 0
4397 && address_size < (sizeof (ULONGEST) * 8))
4399 /* Only create a mask when that mask can safely be constructed
4400 in a ULONGEST variable. */
4402 mask = (mask << address_size) - 1;
4408 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
4409 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
4410 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
4411 (which may be more than *OUT_LEN due to escape characters). The
4412 total number of bytes in the output buffer will be at most
4416 remote_escape_output (const gdb_byte *buffer, int len,
4417 gdb_byte *out_buf, int *out_len,
4420 int input_index, output_index;
4423 for (input_index = 0; input_index < len; input_index++)
4425 gdb_byte b = buffer[input_index];
4427 if (b == '$' || b == '#' || b == '}')
4429 /* These must be escaped. */
4430 if (output_index + 2 > out_maxlen)
4432 out_buf[output_index++] = '}';
4433 out_buf[output_index++] = b ^ 0x20;
4437 if (output_index + 1 > out_maxlen)
4439 out_buf[output_index++] = b;
4443 *out_len = input_index;
4444 return output_index;
4447 /* Convert BUFFER, escaped data LEN bytes long, into binary data
4448 in OUT_BUF. Return the number of bytes written to OUT_BUF.
4449 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
4451 This function reverses remote_escape_output. It allows more
4452 escaped characters than that function does, in particular because
4453 '*' must be escaped to avoid the run-length encoding processing
4454 in reading packets. */
4457 remote_unescape_input (const gdb_byte *buffer, int len,
4458 gdb_byte *out_buf, int out_maxlen)
4460 int input_index, output_index;
4465 for (input_index = 0; input_index < len; input_index++)
4467 gdb_byte b = buffer[input_index];
4469 if (output_index + 1 > out_maxlen)
4471 warning (_("Received too much data from remote target;"
4472 " ignoring overflow."));
4473 return output_index;
4478 out_buf[output_index++] = b ^ 0x20;
4484 out_buf[output_index++] = b;
4488 error (_("Unmatched escape character in target response."));
4490 return output_index;
4493 /* Determine whether the remote target supports binary downloading.
4494 This is accomplished by sending a no-op memory write of zero length
4495 to the target at the specified address. It does not suffice to send
4496 the whole packet, since many stubs strip the eighth bit and
4497 subsequently compute a wrong checksum, which causes real havoc with
4500 NOTE: This can still lose if the serial line is not eight-bit
4501 clean. In cases like this, the user should clear "remote
4505 check_binary_download (CORE_ADDR addr)
4507 struct remote_state *rs = get_remote_state ();
4509 switch (remote_protocol_packets[PACKET_X].support)
4511 case PACKET_DISABLE:
4515 case PACKET_SUPPORT_UNKNOWN:
4521 p += hexnumstr (p, (ULONGEST) addr);
4523 p += hexnumstr (p, (ULONGEST) 0);
4527 putpkt_binary (rs->buf, (int) (p - rs->buf));
4528 getpkt (&rs->buf, &rs->buf_size, 0);
4530 if (rs->buf[0] == '\0')
4533 fprintf_unfiltered (gdb_stdlog,
4534 "binary downloading NOT suppported by target\n");
4535 remote_protocol_packets[PACKET_X].support = PACKET_DISABLE;
4540 fprintf_unfiltered (gdb_stdlog,
4541 "binary downloading suppported by target\n");
4542 remote_protocol_packets[PACKET_X].support = PACKET_ENABLE;
4549 /* Write memory data directly to the remote machine.
4550 This does not inform the data cache; the data cache uses this.
4551 HEADER is the starting part of the packet.
4552 MEMADDR is the address in the remote memory space.
4553 MYADDR is the address of the buffer in our space.
4554 LEN is the number of bytes.
4555 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
4556 should send data as binary ('X'), or hex-encoded ('M').
4558 The function creates packet of the form
4559 <HEADER><ADDRESS>,<LENGTH>:<DATA>
4561 where encoding of <DATA> is termined by PACKET_FORMAT.
4563 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
4566 Returns the number of bytes transferred, or 0 (setting errno) for
4567 error. Only transfer a single packet. */
4570 remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
4571 const gdb_byte *myaddr, int len,
4572 char packet_format, int use_length)
4574 struct remote_state *rs = get_remote_state ();
4584 if (packet_format != 'X' && packet_format != 'M')
4585 internal_error (__FILE__, __LINE__,
4586 "remote_write_bytes_aux: bad packet format");
4591 payload_size = get_memory_write_packet_size ();
4593 /* The packet buffer will be large enough for the payload;
4594 get_memory_packet_size ensures this. */
4597 /* Compute the size of the actual payload by subtracting out the
4598 packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
4600 payload_size -= strlen ("$,:#NN");
4602 /* The comma won't be used. */
4604 header_length = strlen (header);
4605 payload_size -= header_length;
4606 payload_size -= hexnumlen (memaddr);
4608 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
4610 strcat (rs->buf, header);
4611 p = rs->buf + strlen (header);
4613 /* Compute a best guess of the number of bytes actually transfered. */
4614 if (packet_format == 'X')
4616 /* Best guess at number of bytes that will fit. */
4617 todo = min (len, payload_size);
4619 payload_size -= hexnumlen (todo);
4620 todo = min (todo, payload_size);
4624 /* Num bytes that will fit. */
4625 todo = min (len, payload_size / 2);
4627 payload_size -= hexnumlen (todo);
4628 todo = min (todo, payload_size / 2);
4632 internal_error (__FILE__, __LINE__,
4633 _("minumum packet size too small to write data"));
4635 /* If we already need another packet, then try to align the end
4636 of this packet to a useful boundary. */
4637 if (todo > 2 * REMOTE_ALIGN_WRITES && todo < len)
4638 todo = ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr;
4640 /* Append "<memaddr>". */
4641 memaddr = remote_address_masked (memaddr);
4642 p += hexnumstr (p, (ULONGEST) memaddr);
4649 /* Append <len>. Retain the location/size of <len>. It may need to
4650 be adjusted once the packet body has been created. */
4652 plenlen = hexnumstr (p, (ULONGEST) todo);
4660 /* Append the packet body. */
4661 if (packet_format == 'X')
4663 /* Binary mode. Send target system values byte by byte, in
4664 increasing byte addresses. Only escape certain critical
4666 payload_length = remote_escape_output (myaddr, todo, p, &nr_bytes,
4669 /* If not all TODO bytes fit, then we'll need another packet. Make
4670 a second try to keep the end of the packet aligned. Don't do
4671 this if the packet is tiny. */
4672 if (nr_bytes < todo && nr_bytes > 2 * REMOTE_ALIGN_WRITES)
4676 new_nr_bytes = (((memaddr + nr_bytes) & ~(REMOTE_ALIGN_WRITES - 1))
4678 if (new_nr_bytes != nr_bytes)
4679 payload_length = remote_escape_output (myaddr, new_nr_bytes,
4684 p += payload_length;
4685 if (use_length && nr_bytes < todo)
4687 /* Escape chars have filled up the buffer prematurely,
4688 and we have actually sent fewer bytes than planned.
4689 Fix-up the length field of the packet. Use the same
4690 number of characters as before. */
4691 plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen);
4692 *plen = ':'; /* overwrite \0 from hexnumnstr() */
4697 /* Normal mode: Send target system values byte by byte, in
4698 increasing byte addresses. Each byte is encoded as a two hex
4700 nr_bytes = bin2hex (myaddr, p, todo);
4704 putpkt_binary (rs->buf, (int) (p - rs->buf));
4705 getpkt (&rs->buf, &rs->buf_size, 0);
4707 if (rs->buf[0] == 'E')
4709 /* There is no correspondance between what the remote protocol
4710 uses for errors and errno codes. We would like a cleaner way
4711 of representing errors (big enough to include errno codes,
4712 bfd_error codes, and others). But for now just return EIO. */
4717 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
4718 fewer bytes than we'd planned. */
4722 /* Write memory data directly to the remote machine.
4723 This does not inform the data cache; the data cache uses this.
4724 MEMADDR is the address in the remote memory space.
4725 MYADDR is the address of the buffer in our space.
4726 LEN is the number of bytes.
4728 Returns number of bytes transferred, or 0 (setting errno) for
4729 error. Only transfer a single packet. */
4732 remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
4734 char *packet_format = 0;
4736 /* Check whether the target supports binary download. */
4737 check_binary_download (memaddr);
4739 switch (remote_protocol_packets[PACKET_X].support)
4742 packet_format = "X";
4744 case PACKET_DISABLE:
4745 packet_format = "M";
4747 case PACKET_SUPPORT_UNKNOWN:
4748 internal_error (__FILE__, __LINE__,
4749 _("remote_write_bytes: bad internal state"));
4751 internal_error (__FILE__, __LINE__, _("bad switch"));
4754 return remote_write_bytes_aux (packet_format,
4755 memaddr, myaddr, len, packet_format[0], 1);
4758 /* Read memory data directly from the remote machine.
4759 This does not use the data cache; the data cache uses this.
4760 MEMADDR is the address in the remote memory space.
4761 MYADDR is the address of the buffer in our space.
4762 LEN is the number of bytes.
4764 Returns number of bytes transferred, or 0 for error. */
4766 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
4767 remote targets) shouldn't attempt to read the entire buffer.
4768 Instead it should read a single packet worth of data and then
4769 return the byte size of that packet to the caller. The caller (its
4770 caller and its callers caller ;-) already contains code for
4771 handling partial reads. */
4774 remote_read_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
4776 struct remote_state *rs = get_remote_state ();
4777 int max_buf_size; /* Max size of packet output buffer. */
4783 max_buf_size = get_memory_read_packet_size ();
4784 /* The packet buffer will be large enough for the payload;
4785 get_memory_packet_size ensures this. */
4794 todo = min (len, max_buf_size / 2); /* num bytes that will fit */
4796 /* construct "m"<memaddr>","<len>" */
4797 /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */
4798 memaddr = remote_address_masked (memaddr);
4801 p += hexnumstr (p, (ULONGEST) memaddr);
4803 p += hexnumstr (p, (ULONGEST) todo);
4807 getpkt (&rs->buf, &rs->buf_size, 0);
4809 if (rs->buf[0] == 'E'
4810 && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2])
4811 && rs->buf[3] == '\0')
4813 /* There is no correspondance between what the remote
4814 protocol uses for errors and errno codes. We would like
4815 a cleaner way of representing errors (big enough to
4816 include errno codes, bfd_error codes, and others). But
4817 for now just return EIO. */
4822 /* Reply describes memory byte by byte,
4823 each byte encoded as two hex characters. */
4826 if ((i = hex2bin (p, myaddr, todo)) < todo)
4828 /* Reply is short. This means that we were able to read
4829 only part of what we wanted to. */
4830 return i + (origlen - len);
4839 /* Read or write LEN bytes from inferior memory at MEMADDR,
4840 transferring to or from debugger address BUFFER. Write to inferior
4841 if SHOULD_WRITE is nonzero. Returns length of data written or
4842 read; 0 for error. TARGET is unused. */
4845 remote_xfer_memory (CORE_ADDR mem_addr, gdb_byte *buffer, int mem_len,
4846 int should_write, struct mem_attrib *attrib,
4847 struct target_ops *target)
4851 set_general_thread (inferior_ptid);
4854 res = remote_write_bytes (mem_addr, buffer, mem_len);
4856 res = remote_read_bytes (mem_addr, buffer, mem_len);
4861 /* Sends a packet with content determined by the printf format string
4862 FORMAT and the remaining arguments, then gets the reply. Returns
4863 whether the packet was a success, a failure, or unknown. */
4866 remote_send_printf (const char *format, ...)
4868 struct remote_state *rs = get_remote_state ();
4869 int max_size = get_remote_packet_size ();
4872 va_start (ap, format);
4875 if (vsnprintf (rs->buf, max_size, format, ap) >= max_size)
4876 internal_error (__FILE__, __LINE__, "Too long remote packet.");
4878 if (putpkt (rs->buf) < 0)
4879 error (_("Communication problem with target."));
4882 getpkt (&rs->buf, &rs->buf_size, 0);
4884 return packet_check_result (rs->buf);
4888 restore_remote_timeout (void *p)
4890 int value = *(int *)p;
4891 remote_timeout = value;
4894 /* Flash writing can take quite some time. We'll set
4895 effectively infinite timeout for flash operations.
4896 In future, we'll need to decide on a better approach. */
4897 static const int remote_flash_timeout = 1000;
4900 remote_flash_erase (struct target_ops *ops,
4901 ULONGEST address, LONGEST length)
4903 int saved_remote_timeout = remote_timeout;
4904 enum packet_result ret;
4906 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
4907 &saved_remote_timeout);
4908 remote_timeout = remote_flash_timeout;
4910 ret = remote_send_printf ("vFlashErase:%s,%s",
4915 case PACKET_UNKNOWN:
4916 error (_("Remote target does not support flash erase"));
4918 error (_("Error erasing flash with vFlashErase packet"));
4923 do_cleanups (back_to);
4927 remote_flash_write (struct target_ops *ops,
4928 ULONGEST address, LONGEST length,
4929 const gdb_byte *data)
4931 int saved_remote_timeout = remote_timeout;
4933 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
4934 &saved_remote_timeout);
4936 remote_timeout = remote_flash_timeout;
4937 ret = remote_write_bytes_aux ("vFlashWrite:", address, data, length, 'X', 0);
4938 do_cleanups (back_to);
4944 remote_flash_done (struct target_ops *ops)
4946 int saved_remote_timeout = remote_timeout;
4948 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
4949 &saved_remote_timeout);
4951 remote_timeout = remote_flash_timeout;
4952 ret = remote_send_printf ("vFlashDone");
4953 do_cleanups (back_to);
4957 case PACKET_UNKNOWN:
4958 error (_("Remote target does not support vFlashDone"));
4960 error (_("Error finishing flash operation"));
4967 remote_files_info (struct target_ops *ignore)
4969 puts_filtered ("Debugging a target over a serial line.\n");
4972 /* Stuff for dealing with the packets which are part of this protocol.
4973 See comment at top of file for details. */
4975 /* Read a single character from the remote end. */
4978 readchar (int timeout)
4982 ch = serial_readchar (remote_desc, timeout);
4987 switch ((enum serial_rc) ch)
4991 error (_("Remote connection closed"));
4994 perror_with_name (_("Remote communication error"));
4996 case SERIAL_TIMEOUT:
5002 /* Send the command in *BUF to the remote machine, and read the reply
5003 into *BUF. Report an error if we get an error reply. Resize
5004 *BUF using xrealloc if necessary to hold the result, and update
5008 remote_send (char **buf,
5012 getpkt (buf, sizeof_buf, 0);
5014 if ((*buf)[0] == 'E')
5015 error (_("Remote failure reply: %s"), *buf);
5018 /* Display a null-terminated packet on stdout, for debugging, using C
5022 print_packet (char *buf)
5024 puts_filtered ("\"");
5025 fputstr_filtered (buf, '"', gdb_stdout);
5026 puts_filtered ("\"");
5032 return putpkt_binary (buf, strlen (buf));
5035 /* Send a packet to the remote machine, with error checking. The data
5036 of the packet is in BUF. The string in BUF can be at most
5037 get_remote_packet_size () - 5 to account for the $, # and checksum,
5038 and for a possible /0 if we are debugging (remote_debug) and want
5039 to print the sent packet as a string. */
5042 putpkt_binary (char *buf, int cnt)
5044 struct remote_state *rs = get_remote_state ();
5046 unsigned char csum = 0;
5047 char *buf2 = alloca (cnt + 6);
5053 /* Catch cases like trying to read memory or listing threads while
5054 we're waiting for a stop reply. The remote server wouldn't be
5055 ready to handle this request, so we'd hang and timeout. We don't
5056 have to worry about this in synchronous mode, because in that
5057 case it's not possible to issue a command while the target is
5059 if (target_can_async_p () && rs->waiting_for_stop_reply)
5060 error (_("Cannot execute this command while the target is running."));
5062 /* We're sending out a new packet. Make sure we don't look at a
5063 stale cached response. */
5064 rs->cached_wait_status = 0;
5066 /* Copy the packet into buffer BUF2, encapsulating it
5067 and giving it a checksum. */
5072 for (i = 0; i < cnt; i++)
5078 *p++ = tohex ((csum >> 4) & 0xf);
5079 *p++ = tohex (csum & 0xf);
5081 /* Send it over and over until we get a positive ack. */
5085 int started_error_output = 0;
5090 fprintf_unfiltered (gdb_stdlog, "Sending packet: ");
5091 fputstrn_unfiltered (buf2, p - buf2, 0, gdb_stdlog);
5092 fprintf_unfiltered (gdb_stdlog, "...");
5093 gdb_flush (gdb_stdlog);
5095 if (serial_write (remote_desc, buf2, p - buf2))
5096 perror_with_name (_("putpkt: write failed"));
5098 /* If this is a no acks version of the remote protocol, send the
5099 packet and move on. */
5103 /* Read until either a timeout occurs (-2) or '+' is read. */
5106 ch = readchar (remote_timeout);
5114 case SERIAL_TIMEOUT:
5116 if (started_error_output)
5118 putchar_unfiltered ('\n');
5119 started_error_output = 0;
5128 fprintf_unfiltered (gdb_stdlog, "Ack\n");
5132 fprintf_unfiltered (gdb_stdlog, "Nak\n");
5133 case SERIAL_TIMEOUT:
5137 break; /* Retransmit buffer. */
5141 fprintf_unfiltered (gdb_stdlog,
5142 "Packet instead of Ack, ignoring it\n");
5143 /* It's probably an old response sent because an ACK
5144 was lost. Gobble up the packet and ack it so it
5145 doesn't get retransmitted when we resend this
5148 serial_write (remote_desc, "+", 1);
5149 continue; /* Now, go look for +. */
5154 if (!started_error_output)
5156 started_error_output = 1;
5157 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
5159 fputc_unfiltered (ch & 0177, gdb_stdlog);
5163 break; /* Here to retransmit. */
5167 /* This is wrong. If doing a long backtrace, the user should be
5168 able to get out next time we call QUIT, without anything as
5169 violent as interrupt_query. If we want to provide a way out of
5170 here without getting to the next QUIT, it should be based on
5171 hitting ^C twice as in remote_wait. */
5182 /* Come here after finding the start of a frame when we expected an
5183 ack. Do our best to discard the rest of this packet. */
5192 c = readchar (remote_timeout);
5195 case SERIAL_TIMEOUT:
5196 /* Nothing we can do. */
5199 /* Discard the two bytes of checksum and stop. */
5200 c = readchar (remote_timeout);
5202 c = readchar (remote_timeout);
5205 case '*': /* Run length encoding. */
5206 /* Discard the repeat count. */
5207 c = readchar (remote_timeout);
5212 /* A regular character. */
5218 /* Come here after finding the start of the frame. Collect the rest
5219 into *BUF, verifying the checksum, length, and handling run-length
5220 compression. NUL terminate the buffer. If there is not enough room,
5221 expand *BUF using xrealloc.
5223 Returns -1 on error, number of characters in buffer (ignoring the
5224 trailing NULL) on success. (could be extended to return one of the
5225 SERIAL status indications). */
5228 read_frame (char **buf_p,
5235 struct remote_state *rs = get_remote_state ();
5242 c = readchar (remote_timeout);
5245 case SERIAL_TIMEOUT:
5247 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
5251 fputs_filtered ("Saw new packet start in middle of old one\n",
5253 return -1; /* Start a new packet, count retries. */
5256 unsigned char pktcsum;
5262 check_0 = readchar (remote_timeout);
5264 check_1 = readchar (remote_timeout);
5266 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
5269 fputs_filtered ("Timeout in checksum, retrying\n",
5273 else if (check_0 < 0 || check_1 < 0)
5276 fputs_filtered ("Communication error in checksum\n",
5281 /* Don't recompute the checksum; with no ack packets we
5282 don't have any way to indicate a packet retransmission
5287 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
5288 if (csum == pktcsum)
5293 fprintf_filtered (gdb_stdlog,
5294 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
5296 fputstrn_filtered (buf, bc, 0, gdb_stdlog);
5297 fputs_filtered ("\n", gdb_stdlog);
5299 /* Number of characters in buffer ignoring trailing
5303 case '*': /* Run length encoding. */
5308 c = readchar (remote_timeout);
5310 repeat = c - ' ' + 3; /* Compute repeat count. */
5312 /* The character before ``*'' is repeated. */
5314 if (repeat > 0 && repeat <= 255 && bc > 0)
5316 if (bc + repeat - 1 >= *sizeof_buf - 1)
5318 /* Make some more room in the buffer. */
5319 *sizeof_buf += repeat;
5320 *buf_p = xrealloc (*buf_p, *sizeof_buf);
5324 memset (&buf[bc], buf[bc - 1], repeat);
5330 printf_filtered (_("Invalid run length encoding: %s\n"), buf);
5334 if (bc >= *sizeof_buf - 1)
5336 /* Make some more room in the buffer. */
5338 *buf_p = xrealloc (*buf_p, *sizeof_buf);
5349 /* Read a packet from the remote machine, with error checking, and
5350 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
5351 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
5352 rather than timing out; this is used (in synchronous mode) to wait
5353 for a target that is is executing user code to stop. */
5354 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
5355 don't have to change all the calls to getpkt to deal with the
5356 return value, because at the moment I don't know what the right
5357 thing to do it for those. */
5365 timed_out = getpkt_sane (buf, sizeof_buf, forever);
5369 /* Read a packet from the remote machine, with error checking, and
5370 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
5371 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
5372 rather than timing out; this is used (in synchronous mode) to wait
5373 for a target that is is executing user code to stop. If FOREVER ==
5374 0, this function is allowed to time out gracefully and return an
5375 indication of this to the caller. Otherwise return the number
5378 getpkt_sane (char **buf, long *sizeof_buf, int forever)
5380 struct remote_state *rs = get_remote_state ();
5386 /* We're reading a new response. Make sure we don't look at a
5387 previously cached response. */
5388 rs->cached_wait_status = 0;
5390 strcpy (*buf, "timeout");
5394 timeout = watchdog > 0 ? watchdog : -1;
5398 timeout = remote_timeout;
5402 for (tries = 1; tries <= MAX_TRIES; tries++)
5404 /* This can loop forever if the remote side sends us characters
5405 continuously, but if it pauses, we'll get a zero from
5406 readchar because of timeout. Then we'll count that as a
5409 /* Note that we will only wait forever prior to the start of a
5410 packet. After that, we expect characters to arrive at a
5411 brisk pace. They should show up within remote_timeout
5416 c = readchar (timeout);
5418 if (c == SERIAL_TIMEOUT)
5420 if (forever) /* Watchdog went off? Kill the target. */
5424 error (_("Watchdog timeout has expired. Target detached."));
5427 fputs_filtered ("Timed out.\n", gdb_stdlog);
5433 /* We've found the start of a packet, now collect the data. */
5435 val = read_frame (buf, sizeof_buf);
5441 fprintf_unfiltered (gdb_stdlog, "Packet received: ");
5442 fputstrn_unfiltered (*buf, val, 0, gdb_stdlog);
5443 fprintf_unfiltered (gdb_stdlog, "\n");
5446 /* Skip the ack char if we're in no-ack mode. */
5447 if (!rs->noack_mode)
5448 serial_write (remote_desc, "+", 1);
5452 /* Try the whole thing again. */
5454 /* Skip the nack char if we're in no-ack mode. */
5455 if (!rs->noack_mode)
5456 serial_write (remote_desc, "-", 1);
5459 /* We have tried hard enough, and just can't receive the packet.
5462 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
5464 /* Skip the ack char if we're in no-ack mode. */
5465 if (!rs->noack_mode)
5466 serial_write (remote_desc, "+", 1);
5473 /* Use catch_errors so the user can quit from gdb even when we
5474 aren't on speaking terms with the remote system. */
5475 catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
5477 /* Don't wait for it to die. I'm not really sure it matters whether
5478 we do or not. For the existing stubs, kill is a noop. */
5479 target_mourn_inferior ();
5483 remote_vkill (int pid, struct remote_state *rs)
5485 if (remote_protocol_packets[PACKET_vKill].support == PACKET_DISABLE)
5488 /* Tell the remote target to detach. */
5489 sprintf (rs->buf, "vKill;%x", pid);
5491 getpkt (&rs->buf, &rs->buf_size, 0);
5493 if (packet_ok (rs->buf,
5494 &remote_protocol_packets[PACKET_vKill]) == PACKET_OK)
5496 else if (remote_protocol_packets[PACKET_vKill].support == PACKET_DISABLE)
5503 extended_remote_kill (void)
5506 int pid = ptid_get_pid (inferior_ptid);
5507 struct remote_state *rs = get_remote_state ();
5509 res = remote_vkill (pid, rs);
5510 if (res == -1 && !remote_multi_process_p (rs))
5512 /* Don't try 'k' on a multi-process aware stub -- it has no way
5513 to specify the pid. */
5517 getpkt (&rs->buf, &rs->buf_size, 0);
5518 if (rs->buf[0] != 'O' || rs->buf[0] != 'K')
5521 /* Don't wait for it to die. I'm not really sure it matters whether
5522 we do or not. For the existing stubs, kill is a noop. */
5528 error (_("Can't kill process"));
5530 delete_inferior (pid);
5531 target_mourn_inferior ();
5537 remote_mourn_1 (&remote_ops);
5540 /* Worker function for remote_mourn. */
5542 remote_mourn_1 (struct target_ops *target)
5544 unpush_target (target);
5546 /* remote_close takes care of cleaning up. */
5550 select_new_thread_callback (struct thread_info *th, void* data)
5552 if (!ptid_equal (th->ptid, minus_one_ptid))
5554 switch_to_thread (th->ptid);
5555 printf_filtered (_("[Switching to %s]\n"),
5556 target_pid_to_str (inferior_ptid));
5563 extended_remote_mourn_1 (struct target_ops *target)
5565 struct remote_state *rs = get_remote_state ();
5567 /* In case we got here due to an error, but we're going to stay
5569 rs->waiting_for_stop_reply = 0;
5571 /* Unlike "target remote", we do not want to unpush the target; then
5572 the next time the user says "run", we won't be connected. */
5574 if (have_inferiors ())
5576 extern void nullify_last_target_wait_ptid ();
5577 /* Multi-process case. The current process has exited, but
5578 there are other processes to debug. Switch to the first
5580 iterate_over_threads (select_new_thread_callback, NULL);
5581 nullify_last_target_wait_ptid ();
5585 struct remote_state *rs = get_remote_state ();
5587 /* Call common code to mark the inferior as not running. */
5588 generic_mourn_inferior ();
5589 if (!remote_multi_process_p (rs))
5591 /* Check whether the target is running now - some remote stubs
5592 automatically restart after kill. */
5594 getpkt (&rs->buf, &rs->buf_size, 0);
5596 if (rs->buf[0] == 'S' || rs->buf[0] == 'T')
5598 /* Assume that the target has been restarted. Set inferior_ptid
5599 so that bits of core GDB realizes there's something here, e.g.,
5600 so that the user can say "kill" again. */
5601 inferior_ptid = magic_null_ptid;
5605 /* Mark this (still pushed) target as not executable until we
5607 target_mark_exited (target);
5611 /* Always remove execution if this was the last process. */
5612 target_mark_exited (target);
5617 extended_remote_mourn (void)
5619 extended_remote_mourn_1 (&extended_remote_ops);
5623 extended_remote_run (char *args)
5625 struct remote_state *rs = get_remote_state ();
5629 /* If the user has disabled vRun support, or we have detected that
5630 support is not available, do not try it. */
5631 if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE)
5634 strcpy (rs->buf, "vRun;");
5635 len = strlen (rs->buf);
5637 if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ())
5638 error (_("Remote file name too long for run packet"));
5639 len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len, 0);
5641 gdb_assert (args != NULL);
5644 struct cleanup *back_to;
5648 argv = gdb_buildargv (args);
5649 back_to = make_cleanup ((void (*) (void *)) freeargv, argv);
5650 for (i = 0; argv[i] != NULL; i++)
5652 if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ())
5653 error (_("Argument list too long for run packet"));
5654 rs->buf[len++] = ';';
5655 len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len, 0);
5657 do_cleanups (back_to);
5660 rs->buf[len++] = '\0';
5663 getpkt (&rs->buf, &rs->buf_size, 0);
5665 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]) == PACKET_OK)
5667 /* We have a wait response; we don't need it, though. All is well. */
5670 else if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE)
5671 /* It wasn't disabled before, but it is now. */
5675 if (remote_exec_file[0] == '\0')
5676 error (_("Running the default executable on the remote target failed; "
5677 "try \"set remote exec-file\"?"));
5679 error (_("Running \"%s\" on the remote target failed"),
5684 /* In the extended protocol we want to be able to do things like
5685 "run" and have them basically work as expected. So we need
5686 a special create_inferior function. We support changing the
5687 executable file and the command line arguments, but not the
5691 extended_remote_create_inferior_1 (char *exec_file, char *args,
5692 char **env, int from_tty)
5694 /* If running asynchronously, register the target file descriptor
5695 with the event loop. */
5696 if (target_can_async_p ())
5697 target_async (inferior_event_handler, 0);
5699 /* Now restart the remote server. */
5700 if (extended_remote_run (args) == -1)
5702 /* vRun was not supported. Fail if we need it to do what the
5704 if (remote_exec_file[0])
5705 error (_("Remote target does not support \"set remote exec-file\""));
5707 error (_("Remote target does not support \"set args\" or run <ARGS>"));
5709 /* Fall back to "R". */
5710 extended_remote_restart ();
5713 /* Clean up from the last time we ran, before we mark the target
5714 running again. This will mark breakpoints uninserted, and
5715 get_offsets may insert breakpoints. */
5716 init_thread_list ();
5717 init_wait_for_inferior ();
5719 /* Now mark the inferior as running before we do anything else. */
5720 inferior_ptid = magic_null_ptid;
5722 add_inferior (ptid_get_pid (inferior_ptid));
5723 add_thread_silent (inferior_ptid);
5725 target_mark_running (&extended_remote_ops);
5727 /* Get updated offsets, if the stub uses qOffsets. */
5732 extended_remote_create_inferior (char *exec_file, char *args,
5733 char **env, int from_tty)
5735 extended_remote_create_inferior_1 (exec_file, args, env, from_tty);
5739 /* Insert a breakpoint. On targets that have software breakpoint
5740 support, we ask the remote target to do the work; on targets
5741 which don't, we insert a traditional memory breakpoint. */
5744 remote_insert_breakpoint (struct bp_target_info *bp_tgt)
5746 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
5747 If it succeeds, then set the support to PACKET_ENABLE. If it
5748 fails, and the user has explicitly requested the Z support then
5749 report an error, otherwise, mark it disabled and go on. */
5751 if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE)
5753 CORE_ADDR addr = bp_tgt->placed_address;
5754 struct remote_state *rs;
5758 gdbarch_breakpoint_from_pc (target_gdbarch, &addr, &bpsize);
5760 rs = get_remote_state ();
5766 addr = (ULONGEST) remote_address_masked (addr);
5767 p += hexnumstr (p, addr);
5768 sprintf (p, ",%d", bpsize);
5771 getpkt (&rs->buf, &rs->buf_size, 0);
5773 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0]))
5778 bp_tgt->placed_address = addr;
5779 bp_tgt->placed_size = bpsize;
5781 case PACKET_UNKNOWN:
5786 return memory_insert_breakpoint (bp_tgt);
5790 remote_remove_breakpoint (struct bp_target_info *bp_tgt)
5792 CORE_ADDR addr = bp_tgt->placed_address;
5793 struct remote_state *rs = get_remote_state ();
5796 if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE)
5804 addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
5805 p += hexnumstr (p, addr);
5806 sprintf (p, ",%d", bp_tgt->placed_size);
5809 getpkt (&rs->buf, &rs->buf_size, 0);
5811 return (rs->buf[0] == 'E');
5814 return memory_remove_breakpoint (bp_tgt);
5818 watchpoint_to_Z_packet (int type)
5823 return Z_PACKET_WRITE_WP;
5826 return Z_PACKET_READ_WP;
5829 return Z_PACKET_ACCESS_WP;
5832 internal_error (__FILE__, __LINE__,
5833 _("hw_bp_to_z: bad watchpoint type %d"), type);
5838 remote_insert_watchpoint (CORE_ADDR addr, int len, int type)
5840 struct remote_state *rs = get_remote_state ();
5842 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
5844 if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE)
5847 sprintf (rs->buf, "Z%x,", packet);
5848 p = strchr (rs->buf, '\0');
5849 addr = remote_address_masked (addr);
5850 p += hexnumstr (p, (ULONGEST) addr);
5851 sprintf (p, ",%x", len);
5854 getpkt (&rs->buf, &rs->buf_size, 0);
5856 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
5859 case PACKET_UNKNOWN:
5864 internal_error (__FILE__, __LINE__,
5865 _("remote_insert_watchpoint: reached end of function"));
5870 remote_remove_watchpoint (CORE_ADDR addr, int len, int type)
5872 struct remote_state *rs = get_remote_state ();
5874 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
5876 if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE)
5879 sprintf (rs->buf, "z%x,", packet);
5880 p = strchr (rs->buf, '\0');
5881 addr = remote_address_masked (addr);
5882 p += hexnumstr (p, (ULONGEST) addr);
5883 sprintf (p, ",%x", len);
5885 getpkt (&rs->buf, &rs->buf_size, 0);
5887 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
5890 case PACKET_UNKNOWN:
5895 internal_error (__FILE__, __LINE__,
5896 _("remote_remove_watchpoint: reached end of function"));
5900 int remote_hw_watchpoint_limit = -1;
5901 int remote_hw_breakpoint_limit = -1;
5904 remote_check_watch_resources (int type, int cnt, int ot)
5906 if (type == bp_hardware_breakpoint)
5908 if (remote_hw_breakpoint_limit == 0)
5910 else if (remote_hw_breakpoint_limit < 0)
5912 else if (cnt <= remote_hw_breakpoint_limit)
5917 if (remote_hw_watchpoint_limit == 0)
5919 else if (remote_hw_watchpoint_limit < 0)
5923 else if (cnt <= remote_hw_watchpoint_limit)
5930 remote_stopped_by_watchpoint (void)
5932 return remote_stopped_by_watchpoint_p;
5936 remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
5939 if (remote_stopped_by_watchpoint ())
5941 *addr_p = remote_watch_data_address;
5950 remote_insert_hw_breakpoint (struct bp_target_info *bp_tgt)
5953 struct remote_state *rs;
5956 /* The length field should be set to the size of a breakpoint
5957 instruction, even though we aren't inserting one ourselves. */
5959 gdbarch_breakpoint_from_pc
5960 (target_gdbarch, &bp_tgt->placed_address, &bp_tgt->placed_size);
5962 if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
5965 rs = get_remote_state ();
5972 addr = remote_address_masked (bp_tgt->placed_address);
5973 p += hexnumstr (p, (ULONGEST) addr);
5974 sprintf (p, ",%x", bp_tgt->placed_size);
5977 getpkt (&rs->buf, &rs->buf_size, 0);
5979 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
5982 case PACKET_UNKNOWN:
5987 internal_error (__FILE__, __LINE__,
5988 _("remote_insert_hw_breakpoint: reached end of function"));
5993 remote_remove_hw_breakpoint (struct bp_target_info *bp_tgt)
5996 struct remote_state *rs = get_remote_state ();
5999 if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
6006 addr = remote_address_masked (bp_tgt->placed_address);
6007 p += hexnumstr (p, (ULONGEST) addr);
6008 sprintf (p, ",%x", bp_tgt->placed_size);
6011 getpkt (&rs->buf, &rs->buf_size, 0);
6013 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
6016 case PACKET_UNKNOWN:
6021 internal_error (__FILE__, __LINE__,
6022 _("remote_remove_hw_breakpoint: reached end of function"));
6025 /* Table used by the crc32 function to calcuate the checksum. */
6027 static unsigned long crc32_table[256] =
6030 static unsigned long
6031 crc32 (unsigned char *buf, int len, unsigned int crc)
6033 if (!crc32_table[1])
6035 /* Initialize the CRC table and the decoding table. */
6039 for (i = 0; i < 256; i++)
6041 for (c = i << 24, j = 8; j > 0; --j)
6042 c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
6049 crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255];
6055 /* compare-sections command
6057 With no arguments, compares each loadable section in the exec bfd
6058 with the same memory range on the target, and reports mismatches.
6059 Useful for verifying the image on the target against the exec file.
6060 Depends on the target understanding the new "qCRC:" request. */
6062 /* FIXME: cagney/1999-10-26: This command should be broken down into a
6063 target method (target verify memory) and generic version of the
6064 actual command. This will allow other high-level code (especially
6065 generic_load()) to make use of this target functionality. */
6068 compare_sections_command (char *args, int from_tty)
6070 struct remote_state *rs = get_remote_state ();
6072 unsigned long host_crc, target_crc;
6073 extern bfd *exec_bfd;
6074 struct cleanup *old_chain;
6077 const char *sectname;
6084 error (_("command cannot be used without an exec file"));
6085 if (!current_target.to_shortname ||
6086 strcmp (current_target.to_shortname, "remote") != 0)
6087 error (_("command can only be used with remote target"));
6089 for (s = exec_bfd->sections; s; s = s->next)
6091 if (!(s->flags & SEC_LOAD))
6092 continue; /* skip non-loadable section */
6094 size = bfd_get_section_size (s);
6096 continue; /* skip zero-length section */
6098 sectname = bfd_get_section_name (exec_bfd, s);
6099 if (args && strcmp (args, sectname) != 0)
6100 continue; /* not the section selected by user */
6102 matched = 1; /* do this section */
6104 /* FIXME: assumes lma can fit into long. */
6105 xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx",
6106 (long) lma, (long) size);
6109 /* Be clever; compute the host_crc before waiting for target
6111 sectdata = xmalloc (size);
6112 old_chain = make_cleanup (xfree, sectdata);
6113 bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
6114 host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff);
6116 getpkt (&rs->buf, &rs->buf_size, 0);
6117 if (rs->buf[0] == 'E')
6118 error (_("target memory fault, section %s, range 0x%s -- 0x%s"),
6119 sectname, paddr (lma), paddr (lma + size));
6120 if (rs->buf[0] != 'C')
6121 error (_("remote target does not support this operation"));
6123 for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++)
6124 target_crc = target_crc * 16 + fromhex (*tmp);
6126 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
6127 sectname, paddr (lma), paddr (lma + size));
6128 if (host_crc == target_crc)
6129 printf_filtered ("matched.\n");
6132 printf_filtered ("MIS-MATCHED!\n");
6136 do_cleanups (old_chain);
6139 warning (_("One or more sections of the remote executable does not match\n\
6140 the loaded file\n"));
6141 if (args && !matched)
6142 printf_filtered (_("No loaded section named '%s'.\n"), args);
6145 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
6146 into remote target. The number of bytes written to the remote
6147 target is returned, or -1 for error. */
6150 remote_write_qxfer (struct target_ops *ops, const char *object_name,
6151 const char *annex, const gdb_byte *writebuf,
6152 ULONGEST offset, LONGEST len,
6153 struct packet_config *packet)
6158 struct remote_state *rs = get_remote_state ();
6159 int max_size = get_memory_write_packet_size ();
6161 if (packet->support == PACKET_DISABLE)
6164 /* Insert header. */
6165 i = snprintf (rs->buf, max_size,
6166 "qXfer:%s:write:%s:%s:",
6167 object_name, annex ? annex : "",
6168 phex_nz (offset, sizeof offset));
6169 max_size -= (i + 1);
6171 /* Escape as much data as fits into rs->buf. */
6172 buf_len = remote_escape_output
6173 (writebuf, len, (rs->buf + i), &max_size, max_size);
6175 if (putpkt_binary (rs->buf, i + buf_len) < 0
6176 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
6177 || packet_ok (rs->buf, packet) != PACKET_OK)
6180 unpack_varlen_hex (rs->buf, &n);
6184 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
6185 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
6186 number of bytes read is returned, or 0 for EOF, or -1 for error.
6187 The number of bytes read may be less than LEN without indicating an
6188 EOF. PACKET is checked and updated to indicate whether the remote
6189 target supports this object. */
6192 remote_read_qxfer (struct target_ops *ops, const char *object_name,
6194 gdb_byte *readbuf, ULONGEST offset, LONGEST len,
6195 struct packet_config *packet)
6197 static char *finished_object;
6198 static char *finished_annex;
6199 static ULONGEST finished_offset;
6201 struct remote_state *rs = get_remote_state ();
6202 unsigned int total = 0;
6203 LONGEST i, n, packet_len;
6205 if (packet->support == PACKET_DISABLE)
6208 /* Check whether we've cached an end-of-object packet that matches
6210 if (finished_object)
6212 if (strcmp (object_name, finished_object) == 0
6213 && strcmp (annex ? annex : "", finished_annex) == 0
6214 && offset == finished_offset)
6217 /* Otherwise, we're now reading something different. Discard
6219 xfree (finished_object);
6220 xfree (finished_annex);
6221 finished_object = NULL;
6222 finished_annex = NULL;
6225 /* Request only enough to fit in a single packet. The actual data
6226 may not, since we don't know how much of it will need to be escaped;
6227 the target is free to respond with slightly less data. We subtract
6228 five to account for the response type and the protocol frame. */
6229 n = min (get_remote_packet_size () - 5, len);
6230 snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
6231 object_name, annex ? annex : "",
6232 phex_nz (offset, sizeof offset),
6233 phex_nz (n, sizeof n));
6234 i = putpkt (rs->buf);
6239 packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0);
6240 if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK)
6243 if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
6244 error (_("Unknown remote qXfer reply: %s"), rs->buf);
6246 /* 'm' means there is (or at least might be) more data after this
6247 batch. That does not make sense unless there's at least one byte
6248 of data in this reply. */
6249 if (rs->buf[0] == 'm' && packet_len == 1)
6250 error (_("Remote qXfer reply contained no data."));
6252 /* Got some data. */
6253 i = remote_unescape_input (rs->buf + 1, packet_len - 1, readbuf, n);
6255 /* 'l' is an EOF marker, possibly including a final block of data,
6256 or possibly empty. If we have the final block of a non-empty
6257 object, record this fact to bypass a subsequent partial read. */
6258 if (rs->buf[0] == 'l' && offset + i > 0)
6260 finished_object = xstrdup (object_name);
6261 finished_annex = xstrdup (annex ? annex : "");
6262 finished_offset = offset + i;
6269 remote_xfer_partial (struct target_ops *ops, enum target_object object,
6270 const char *annex, gdb_byte *readbuf,
6271 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
6273 struct remote_state *rs;
6278 set_general_thread (inferior_ptid);
6280 rs = get_remote_state ();
6282 /* Handle memory using the standard memory routines. */
6283 if (object == TARGET_OBJECT_MEMORY)
6288 /* If the remote target is connected but not running, we should
6289 pass this request down to a lower stratum (e.g. the executable
6291 if (!target_has_execution)
6294 if (writebuf != NULL)
6295 xfered = remote_write_bytes (offset, writebuf, len);
6297 xfered = remote_read_bytes (offset, readbuf, len);
6301 else if (xfered == 0 && errno == 0)
6307 /* Handle SPU memory using qxfer packets. */
6308 if (object == TARGET_OBJECT_SPU)
6311 return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len,
6312 &remote_protocol_packets
6313 [PACKET_qXfer_spu_read]);
6315 return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len,
6316 &remote_protocol_packets
6317 [PACKET_qXfer_spu_write]);
6320 /* Only handle flash writes. */
6321 if (writebuf != NULL)
6327 case TARGET_OBJECT_FLASH:
6328 xfered = remote_flash_write (ops, offset, len, writebuf);
6332 else if (xfered == 0 && errno == 0)
6342 /* Map pre-existing objects onto letters. DO NOT do this for new
6343 objects!!! Instead specify new query packets. */
6346 case TARGET_OBJECT_AVR:
6350 case TARGET_OBJECT_AUXV:
6351 gdb_assert (annex == NULL);
6352 return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len,
6353 &remote_protocol_packets[PACKET_qXfer_auxv]);
6355 case TARGET_OBJECT_AVAILABLE_FEATURES:
6356 return remote_read_qxfer
6357 (ops, "features", annex, readbuf, offset, len,
6358 &remote_protocol_packets[PACKET_qXfer_features]);
6360 case TARGET_OBJECT_LIBRARIES:
6361 return remote_read_qxfer
6362 (ops, "libraries", annex, readbuf, offset, len,
6363 &remote_protocol_packets[PACKET_qXfer_libraries]);
6365 case TARGET_OBJECT_MEMORY_MAP:
6366 gdb_assert (annex == NULL);
6367 return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len,
6368 &remote_protocol_packets[PACKET_qXfer_memory_map]);
6374 /* Note: a zero OFFSET and LEN can be used to query the minimum
6376 if (offset == 0 && len == 0)
6377 return (get_remote_packet_size ());
6378 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
6379 large enough let the caller deal with it. */
6380 if (len < get_remote_packet_size ())
6382 len = get_remote_packet_size ();
6384 /* Except for querying the minimum buffer size, target must be open. */
6386 error (_("remote query is only available after target open"));
6388 gdb_assert (annex != NULL);
6389 gdb_assert (readbuf != NULL);
6395 /* We used one buffer char for the remote protocol q command and
6396 another for the query type. As the remote protocol encapsulation
6397 uses 4 chars plus one extra in case we are debugging
6398 (remote_debug), we have PBUFZIZ - 7 left to pack the query
6401 while (annex[i] && (i < (get_remote_packet_size () - 8)))
6403 /* Bad caller may have sent forbidden characters. */
6404 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
6409 gdb_assert (annex[i] == '\0');
6411 i = putpkt (rs->buf);
6415 getpkt (&rs->buf, &rs->buf_size, 0);
6416 strcpy ((char *) readbuf, rs->buf);
6418 return strlen ((char *) readbuf);
6422 remote_search_memory (struct target_ops* ops,
6423 CORE_ADDR start_addr, ULONGEST search_space_len,
6424 const gdb_byte *pattern, ULONGEST pattern_len,
6425 CORE_ADDR *found_addrp)
6427 struct remote_state *rs = get_remote_state ();
6428 int max_size = get_memory_write_packet_size ();
6429 struct packet_config *packet =
6430 &remote_protocol_packets[PACKET_qSearch_memory];
6431 /* number of packet bytes used to encode the pattern,
6432 this could be more than PATTERN_LEN due to escape characters */
6433 int escaped_pattern_len;
6434 /* amount of pattern that was encodable in the packet */
6435 int used_pattern_len;
6438 ULONGEST found_addr;
6440 /* Don't go to the target if we don't have to.
6441 This is done before checking packet->support to avoid the possibility that
6442 a success for this edge case means the facility works in general. */
6443 if (pattern_len > search_space_len)
6445 if (pattern_len == 0)
6447 *found_addrp = start_addr;
6451 /* If we already know the packet isn't supported, fall back to the simple
6452 way of searching memory. */
6454 if (packet->support == PACKET_DISABLE)
6456 /* Target doesn't provided special support, fall back and use the
6457 standard support (copy memory and do the search here). */
6458 return simple_search_memory (ops, start_addr, search_space_len,
6459 pattern, pattern_len, found_addrp);
6462 /* Insert header. */
6463 i = snprintf (rs->buf, max_size,
6464 "qSearch:memory:%s;%s;",
6465 paddr_nz (start_addr),
6466 phex_nz (search_space_len, sizeof (search_space_len)));
6467 max_size -= (i + 1);
6469 /* Escape as much data as fits into rs->buf. */
6470 escaped_pattern_len =
6471 remote_escape_output (pattern, pattern_len, (rs->buf + i),
6472 &used_pattern_len, max_size);
6474 /* Bail if the pattern is too large. */
6475 if (used_pattern_len != pattern_len)
6476 error ("Pattern is too large to transmit to remote target.");
6478 if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0
6479 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
6480 || packet_ok (rs->buf, packet) != PACKET_OK)
6482 /* The request may not have worked because the command is not
6483 supported. If so, fall back to the simple way. */
6484 if (packet->support == PACKET_DISABLE)
6486 return simple_search_memory (ops, start_addr, search_space_len,
6487 pattern, pattern_len, found_addrp);
6492 if (rs->buf[0] == '0')
6494 else if (rs->buf[0] == '1')
6497 if (rs->buf[1] != ',')
6498 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
6499 unpack_varlen_hex (rs->buf + 2, &found_addr);
6500 *found_addrp = found_addr;
6503 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
6509 remote_rcmd (char *command,
6510 struct ui_file *outbuf)
6512 struct remote_state *rs = get_remote_state ();
6516 error (_("remote rcmd is only available after target open"));
6518 /* Send a NULL command across as an empty command. */
6519 if (command == NULL)
6522 /* The query prefix. */
6523 strcpy (rs->buf, "qRcmd,");
6524 p = strchr (rs->buf, '\0');
6526 if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/) > get_remote_packet_size ())
6527 error (_("\"monitor\" command ``%s'' is too long."), command);
6529 /* Encode the actual command. */
6530 bin2hex ((gdb_byte *) command, p, 0);
6532 if (putpkt (rs->buf) < 0)
6533 error (_("Communication problem with target."));
6535 /* get/display the response */
6540 /* XXX - see also tracepoint.c:remote_get_noisy_reply(). */
6542 getpkt (&rs->buf, &rs->buf_size, 0);
6545 error (_("Target does not support this command."));
6546 if (buf[0] == 'O' && buf[1] != 'K')
6548 remote_console_output (buf + 1); /* 'O' message from stub. */
6551 if (strcmp (buf, "OK") == 0)
6553 if (strlen (buf) == 3 && buf[0] == 'E'
6554 && isdigit (buf[1]) && isdigit (buf[2]))
6556 error (_("Protocol error with Rcmd"));
6558 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
6560 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
6561 fputc_unfiltered (c, outbuf);
6567 static VEC(mem_region_s) *
6568 remote_memory_map (struct target_ops *ops)
6570 VEC(mem_region_s) *result = NULL;
6571 char *text = target_read_stralloc (¤t_target,
6572 TARGET_OBJECT_MEMORY_MAP, NULL);
6576 struct cleanup *back_to = make_cleanup (xfree, text);
6577 result = parse_memory_map (text);
6578 do_cleanups (back_to);
6585 packet_command (char *args, int from_tty)
6587 struct remote_state *rs = get_remote_state ();
6590 error (_("command can only be used with remote target"));
6593 error (_("remote-packet command requires packet text as argument"));
6595 puts_filtered ("sending: ");
6596 print_packet (args);
6597 puts_filtered ("\n");
6600 getpkt (&rs->buf, &rs->buf_size, 0);
6601 puts_filtered ("received: ");
6602 print_packet (rs->buf);
6603 puts_filtered ("\n");
6607 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
6609 static void display_thread_info (struct gdb_ext_thread_info *info);
6611 static void threadset_test_cmd (char *cmd, int tty);
6613 static void threadalive_test (char *cmd, int tty);
6615 static void threadlist_test_cmd (char *cmd, int tty);
6617 int get_and_display_threadinfo (threadref *ref);
6619 static void threadinfo_test_cmd (char *cmd, int tty);
6621 static int thread_display_step (threadref *ref, void *context);
6623 static void threadlist_update_test_cmd (char *cmd, int tty);
6625 static void init_remote_threadtests (void);
6627 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
6630 threadset_test_cmd (char *cmd, int tty)
6632 int sample_thread = SAMPLE_THREAD;
6634 printf_filtered (_("Remote threadset test\n"));
6635 set_general_thread (sample_thread);
6640 threadalive_test (char *cmd, int tty)
6642 int sample_thread = SAMPLE_THREAD;
6643 int pid = ptid_get_pid (inferior_ptid);
6644 ptid_t ptid = ptid_build (pid, 0, sample_thread);
6646 if (remote_thread_alive (ptid))
6647 printf_filtered ("PASS: Thread alive test\n");
6649 printf_filtered ("FAIL: Thread alive test\n");
6652 void output_threadid (char *title, threadref *ref);
6655 output_threadid (char *title, threadref *ref)
6659 pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
6661 printf_filtered ("%s %s\n", title, (&hexid[0]));
6665 threadlist_test_cmd (char *cmd, int tty)
6668 threadref nextthread;
6669 int done, result_count;
6670 threadref threadlist[3];
6672 printf_filtered ("Remote Threadlist test\n");
6673 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
6674 &result_count, &threadlist[0]))
6675 printf_filtered ("FAIL: threadlist test\n");
6678 threadref *scan = threadlist;
6679 threadref *limit = scan + result_count;
6681 while (scan < limit)
6682 output_threadid (" thread ", scan++);
6687 display_thread_info (struct gdb_ext_thread_info *info)
6689 output_threadid ("Threadid: ", &info->threadid);
6690 printf_filtered ("Name: %s\n ", info->shortname);
6691 printf_filtered ("State: %s\n", info->display);
6692 printf_filtered ("other: %s\n\n", info->more_display);
6696 get_and_display_threadinfo (threadref *ref)
6700 struct gdb_ext_thread_info threadinfo;
6702 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
6703 | TAG_MOREDISPLAY | TAG_DISPLAY;
6704 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
6705 display_thread_info (&threadinfo);
6710 threadinfo_test_cmd (char *cmd, int tty)
6712 int athread = SAMPLE_THREAD;
6716 int_to_threadref (&thread, athread);
6717 printf_filtered ("Remote Threadinfo test\n");
6718 if (!get_and_display_threadinfo (&thread))
6719 printf_filtered ("FAIL cannot get thread info\n");
6723 thread_display_step (threadref *ref, void *context)
6725 /* output_threadid(" threadstep ",ref); *//* simple test */
6726 return get_and_display_threadinfo (ref);
6730 threadlist_update_test_cmd (char *cmd, int tty)
6732 printf_filtered ("Remote Threadlist update test\n");
6733 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
6737 init_remote_threadtests (void)
6739 add_com ("tlist", class_obscure, threadlist_test_cmd, _("\
6740 Fetch and print the remote list of thread identifiers, one pkt only"));
6741 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
6742 _("Fetch and display info about one thread"));
6743 add_com ("tset", class_obscure, threadset_test_cmd,
6744 _("Test setting to a different thread"));
6745 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
6746 _("Iterate through updating all remote thread info"));
6747 add_com ("talive", class_obscure, threadalive_test,
6748 _(" Remote thread alive test "));
6753 /* Convert a thread ID to a string. Returns the string in a static
6757 remote_pid_to_str (ptid_t ptid)
6759 static char buf[64];
6760 struct remote_state *rs = get_remote_state ();
6762 if (ptid_equal (magic_null_ptid, ptid))
6764 xsnprintf (buf, sizeof buf, "Thread <main>");
6767 else if (remote_multi_process_p (rs)
6768 && ptid_get_tid (ptid) != 0 && ptid_get_pid (ptid) != 0)
6770 xsnprintf (buf, sizeof buf, "Thread %d.%ld",
6771 ptid_get_pid (ptid), ptid_get_tid (ptid));
6774 else if (ptid_get_tid (ptid) != 0)
6776 xsnprintf (buf, sizeof buf, "Thread %ld",
6777 ptid_get_tid (ptid));
6781 return normal_pid_to_str (ptid);
6784 /* Get the address of the thread local variable in OBJFILE which is
6785 stored at OFFSET within the thread local storage for thread PTID. */
6788 remote_get_thread_local_address (ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset)
6790 if (remote_protocol_packets[PACKET_qGetTLSAddr].support != PACKET_DISABLE)
6792 struct remote_state *rs = get_remote_state ();
6794 char *endp = rs->buf + get_remote_packet_size ();
6795 enum packet_result result;
6797 strcpy (p, "qGetTLSAddr:");
6799 p = write_ptid (p, endp, ptid);
6801 p += hexnumstr (p, offset);
6803 p += hexnumstr (p, lm);
6807 getpkt (&rs->buf, &rs->buf_size, 0);
6808 result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_qGetTLSAddr]);
6809 if (result == PACKET_OK)
6813 unpack_varlen_hex (rs->buf, &result);
6816 else if (result == PACKET_UNKNOWN)
6817 throw_error (TLS_GENERIC_ERROR,
6818 _("Remote target doesn't support qGetTLSAddr packet"));
6820 throw_error (TLS_GENERIC_ERROR,
6821 _("Remote target failed to process qGetTLSAddr request"));
6824 throw_error (TLS_GENERIC_ERROR,
6825 _("TLS not supported or disabled on this target"));
6830 /* Support for inferring a target description based on the current
6831 architecture and the size of a 'g' packet. While the 'g' packet
6832 can have any size (since optional registers can be left off the
6833 end), some sizes are easily recognizable given knowledge of the
6834 approximate architecture. */
6836 struct remote_g_packet_guess
6839 const struct target_desc *tdesc;
6841 typedef struct remote_g_packet_guess remote_g_packet_guess_s;
6842 DEF_VEC_O(remote_g_packet_guess_s);
6844 struct remote_g_packet_data
6846 VEC(remote_g_packet_guess_s) *guesses;
6849 static struct gdbarch_data *remote_g_packet_data_handle;
6852 remote_g_packet_data_init (struct obstack *obstack)
6854 return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data);
6858 register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
6859 const struct target_desc *tdesc)
6861 struct remote_g_packet_data *data
6862 = gdbarch_data (gdbarch, remote_g_packet_data_handle);
6863 struct remote_g_packet_guess new_guess, *guess;
6866 gdb_assert (tdesc != NULL);
6869 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
6871 if (guess->bytes == bytes)
6872 internal_error (__FILE__, __LINE__,
6873 "Duplicate g packet description added for size %d",
6876 new_guess.bytes = bytes;
6877 new_guess.tdesc = tdesc;
6878 VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess);
6881 static const struct target_desc *
6882 remote_read_description (struct target_ops *target)
6884 struct remote_g_packet_data *data
6885 = gdbarch_data (target_gdbarch, remote_g_packet_data_handle);
6887 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
6889 struct remote_g_packet_guess *guess;
6891 int bytes = send_g_packet ();
6894 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
6896 if (guess->bytes == bytes)
6897 return guess->tdesc;
6899 /* We discard the g packet. A minor optimization would be to
6900 hold on to it, and fill the register cache once we have selected
6901 an architecture, but it's too tricky to do safely. */
6907 /* Remote file transfer support. This is host-initiated I/O, not
6908 target-initiated; for target-initiated, see remote-fileio.c. */
6910 /* If *LEFT is at least the length of STRING, copy STRING to
6911 *BUFFER, update *BUFFER to point to the new end of the buffer, and
6912 decrease *LEFT. Otherwise raise an error. */
6915 remote_buffer_add_string (char **buffer, int *left, char *string)
6917 int len = strlen (string);
6920 error (_("Packet too long for target."));
6922 memcpy (*buffer, string, len);
6926 /* NUL-terminate the buffer as a convenience, if there is
6932 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
6933 *BUFFER, update *BUFFER to point to the new end of the buffer, and
6934 decrease *LEFT. Otherwise raise an error. */
6937 remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
6940 if (2 * len > *left)
6941 error (_("Packet too long for target."));
6943 bin2hex (bytes, *buffer, len);
6947 /* NUL-terminate the buffer as a convenience, if there is
6953 /* If *LEFT is large enough, convert VALUE to hex and add it to
6954 *BUFFER, update *BUFFER to point to the new end of the buffer, and
6955 decrease *LEFT. Otherwise raise an error. */
6958 remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
6960 int len = hexnumlen (value);
6963 error (_("Packet too long for target."));
6965 hexnumstr (*buffer, value);
6969 /* NUL-terminate the buffer as a convenience, if there is
6975 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
6976 value, *REMOTE_ERRNO to the remote error number or zero if none
6977 was included, and *ATTACHMENT to point to the start of the annex
6978 if any. The length of the packet isn't needed here; there may
6979 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
6981 Return 0 if the packet could be parsed, -1 if it could not. If
6982 -1 is returned, the other variables may not be initialized. */
6985 remote_hostio_parse_result (char *buffer, int *retcode,
6986 int *remote_errno, char **attachment)
6993 if (buffer[0] != 'F')
6997 *retcode = strtol (&buffer[1], &p, 16);
6998 if (errno != 0 || p == &buffer[1])
7001 /* Check for ",errno". */
7005 *remote_errno = strtol (p + 1, &p2, 16);
7006 if (errno != 0 || p + 1 == p2)
7011 /* Check for ";attachment". If there is no attachment, the
7012 packet should end here. */
7015 *attachment = p + 1;
7018 else if (*p == '\0')
7024 /* Send a prepared I/O packet to the target and read its response.
7025 The prepared packet is in the global RS->BUF before this function
7026 is called, and the answer is there when we return.
7028 COMMAND_BYTES is the length of the request to send, which may include
7029 binary data. WHICH_PACKET is the packet configuration to check
7030 before attempting a packet. If an error occurs, *REMOTE_ERRNO
7031 is set to the error number and -1 is returned. Otherwise the value
7032 returned by the function is returned.
7034 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
7035 attachment is expected; an error will be reported if there's a
7036 mismatch. If one is found, *ATTACHMENT will be set to point into
7037 the packet buffer and *ATTACHMENT_LEN will be set to the
7038 attachment's length. */
7041 remote_hostio_send_command (int command_bytes, int which_packet,
7042 int *remote_errno, char **attachment,
7043 int *attachment_len)
7045 struct remote_state *rs = get_remote_state ();
7046 int ret, bytes_read;
7047 char *attachment_tmp;
7050 || remote_protocol_packets[which_packet].support == PACKET_DISABLE)
7052 *remote_errno = FILEIO_ENOSYS;
7056 putpkt_binary (rs->buf, command_bytes);
7057 bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0);
7059 /* If it timed out, something is wrong. Don't try to parse the
7063 *remote_errno = FILEIO_EINVAL;
7067 switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
7070 *remote_errno = FILEIO_EINVAL;
7072 case PACKET_UNKNOWN:
7073 *remote_errno = FILEIO_ENOSYS;
7079 if (remote_hostio_parse_result (rs->buf, &ret, remote_errno,
7082 *remote_errno = FILEIO_EINVAL;
7086 /* Make sure we saw an attachment if and only if we expected one. */
7087 if ((attachment_tmp == NULL && attachment != NULL)
7088 || (attachment_tmp != NULL && attachment == NULL))
7090 *remote_errno = FILEIO_EINVAL;
7094 /* If an attachment was found, it must point into the packet buffer;
7095 work out how many bytes there were. */
7096 if (attachment_tmp != NULL)
7098 *attachment = attachment_tmp;
7099 *attachment_len = bytes_read - (*attachment - rs->buf);
7105 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
7106 remote file descriptor, or -1 if an error occurs (and set
7110 remote_hostio_open (const char *filename, int flags, int mode,
7113 struct remote_state *rs = get_remote_state ();
7115 int left = get_remote_packet_size () - 1;
7117 remote_buffer_add_string (&p, &left, "vFile:open:");
7119 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
7121 remote_buffer_add_string (&p, &left, ",");
7123 remote_buffer_add_int (&p, &left, flags);
7124 remote_buffer_add_string (&p, &left, ",");
7126 remote_buffer_add_int (&p, &left, mode);
7128 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open,
7129 remote_errno, NULL, NULL);
7132 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
7133 Return the number of bytes written, or -1 if an error occurs (and
7134 set *REMOTE_ERRNO). */
7137 remote_hostio_pwrite (int fd, const gdb_byte *write_buf, int len,
7138 ULONGEST offset, int *remote_errno)
7140 struct remote_state *rs = get_remote_state ();
7142 int left = get_remote_packet_size ();
7145 remote_buffer_add_string (&p, &left, "vFile:pwrite:");
7147 remote_buffer_add_int (&p, &left, fd);
7148 remote_buffer_add_string (&p, &left, ",");
7150 remote_buffer_add_int (&p, &left, offset);
7151 remote_buffer_add_string (&p, &left, ",");
7153 p += remote_escape_output (write_buf, len, p, &out_len,
7154 get_remote_packet_size () - (p - rs->buf));
7156 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite,
7157 remote_errno, NULL, NULL);
7160 /* Read up to LEN bytes FD on the remote target into READ_BUF
7161 Return the number of bytes read, or -1 if an error occurs (and
7162 set *REMOTE_ERRNO). */
7165 remote_hostio_pread (int fd, gdb_byte *read_buf, int len,
7166 ULONGEST offset, int *remote_errno)
7168 struct remote_state *rs = get_remote_state ();
7171 int left = get_remote_packet_size ();
7172 int ret, attachment_len;
7175 remote_buffer_add_string (&p, &left, "vFile:pread:");
7177 remote_buffer_add_int (&p, &left, fd);
7178 remote_buffer_add_string (&p, &left, ",");
7180 remote_buffer_add_int (&p, &left, len);
7181 remote_buffer_add_string (&p, &left, ",");
7183 remote_buffer_add_int (&p, &left, offset);
7185 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread,
7186 remote_errno, &attachment,
7192 read_len = remote_unescape_input (attachment, attachment_len,
7194 if (read_len != ret)
7195 error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
7200 /* Close FD on the remote target. Return 0, or -1 if an error occurs
7201 (and set *REMOTE_ERRNO). */
7204 remote_hostio_close (int fd, int *remote_errno)
7206 struct remote_state *rs = get_remote_state ();
7208 int left = get_remote_packet_size () - 1;
7210 remote_buffer_add_string (&p, &left, "vFile:close:");
7212 remote_buffer_add_int (&p, &left, fd);
7214 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close,
7215 remote_errno, NULL, NULL);
7218 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
7219 occurs (and set *REMOTE_ERRNO). */
7222 remote_hostio_unlink (const char *filename, int *remote_errno)
7224 struct remote_state *rs = get_remote_state ();
7226 int left = get_remote_packet_size () - 1;
7228 remote_buffer_add_string (&p, &left, "vFile:unlink:");
7230 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
7233 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink,
7234 remote_errno, NULL, NULL);
7238 remote_fileio_errno_to_host (int errnum)
7262 case FILEIO_ENOTDIR:
7282 case FILEIO_ENAMETOOLONG:
7283 return ENAMETOOLONG;
7289 remote_hostio_error (int errnum)
7291 int host_error = remote_fileio_errno_to_host (errnum);
7293 if (host_error == -1)
7294 error (_("Unknown remote I/O error %d"), errnum);
7296 error (_("Remote I/O error: %s"), safe_strerror (host_error));
7300 fclose_cleanup (void *file)
7306 remote_hostio_close_cleanup (void *opaque)
7308 int fd = *(int *) opaque;
7311 remote_hostio_close (fd, &remote_errno);
7316 remote_bfd_iovec_open (struct bfd *abfd, void *open_closure)
7318 const char *filename = bfd_get_filename (abfd);
7319 int fd, remote_errno;
7322 gdb_assert (remote_filename_p (filename));
7324 fd = remote_hostio_open (filename + 7, FILEIO_O_RDONLY, 0, &remote_errno);
7327 errno = remote_fileio_errno_to_host (remote_errno);
7328 bfd_set_error (bfd_error_system_call);
7332 stream = xmalloc (sizeof (int));
7338 remote_bfd_iovec_close (struct bfd *abfd, void *stream)
7340 int fd = *(int *)stream;
7345 /* Ignore errors on close; these may happen if the remote
7346 connection was already torn down. */
7347 remote_hostio_close (fd, &remote_errno);
7353 remote_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf,
7354 file_ptr nbytes, file_ptr offset)
7356 int fd = *(int *)stream;
7358 file_ptr pos, bytes;
7361 while (nbytes > pos)
7363 bytes = remote_hostio_pread (fd, (char *)buf + pos, nbytes - pos,
7364 offset + pos, &remote_errno);
7366 /* Success, but no bytes, means end-of-file. */
7370 errno = remote_fileio_errno_to_host (remote_errno);
7371 bfd_set_error (bfd_error_system_call);
7382 remote_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb)
7384 /* FIXME: We should probably implement remote_hostio_stat. */
7385 sb->st_size = INT_MAX;
7390 remote_filename_p (const char *filename)
7392 return strncmp (filename, "remote:", 7) == 0;
7396 remote_bfd_open (const char *remote_file, const char *target)
7398 return bfd_openr_iovec (remote_file, target,
7399 remote_bfd_iovec_open, NULL,
7400 remote_bfd_iovec_pread,
7401 remote_bfd_iovec_close,
7402 remote_bfd_iovec_stat);
7406 remote_file_put (const char *local_file, const char *remote_file, int from_tty)
7408 struct cleanup *back_to, *close_cleanup;
7409 int retcode, fd, remote_errno, bytes, io_size;
7412 int bytes_in_buffer;
7417 error (_("command can only be used with remote target"));
7419 file = fopen (local_file, "rb");
7421 perror_with_name (local_file);
7422 back_to = make_cleanup (fclose_cleanup, file);
7424 fd = remote_hostio_open (remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
7426 0700, &remote_errno);
7428 remote_hostio_error (remote_errno);
7430 /* Send up to this many bytes at once. They won't all fit in the
7431 remote packet limit, so we'll transfer slightly fewer. */
7432 io_size = get_remote_packet_size ();
7433 buffer = xmalloc (io_size);
7434 make_cleanup (xfree, buffer);
7436 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
7438 bytes_in_buffer = 0;
7441 while (bytes_in_buffer || !saw_eof)
7445 bytes = fread (buffer + bytes_in_buffer, 1, io_size - bytes_in_buffer,
7450 error (_("Error reading %s."), local_file);
7453 /* EOF. Unless there is something still in the
7454 buffer from the last iteration, we are done. */
7456 if (bytes_in_buffer == 0)
7464 bytes += bytes_in_buffer;
7465 bytes_in_buffer = 0;
7467 retcode = remote_hostio_pwrite (fd, buffer, bytes, offset, &remote_errno);
7470 remote_hostio_error (remote_errno);
7471 else if (retcode == 0)
7472 error (_("Remote write of %d bytes returned 0!"), bytes);
7473 else if (retcode < bytes)
7475 /* Short write. Save the rest of the read data for the next
7477 bytes_in_buffer = bytes - retcode;
7478 memmove (buffer, buffer + retcode, bytes_in_buffer);
7484 discard_cleanups (close_cleanup);
7485 if (remote_hostio_close (fd, &remote_errno))
7486 remote_hostio_error (remote_errno);
7489 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
7490 do_cleanups (back_to);
7494 remote_file_get (const char *remote_file, const char *local_file, int from_tty)
7496 struct cleanup *back_to, *close_cleanup;
7497 int retcode, fd, remote_errno, bytes, io_size;
7503 error (_("command can only be used with remote target"));
7505 fd = remote_hostio_open (remote_file, FILEIO_O_RDONLY, 0, &remote_errno);
7507 remote_hostio_error (remote_errno);
7509 file = fopen (local_file, "wb");
7511 perror_with_name (local_file);
7512 back_to = make_cleanup (fclose_cleanup, file);
7514 /* Send up to this many bytes at once. They won't all fit in the
7515 remote packet limit, so we'll transfer slightly fewer. */
7516 io_size = get_remote_packet_size ();
7517 buffer = xmalloc (io_size);
7518 make_cleanup (xfree, buffer);
7520 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
7525 bytes = remote_hostio_pread (fd, buffer, io_size, offset, &remote_errno);
7527 /* Success, but no bytes, means end-of-file. */
7530 remote_hostio_error (remote_errno);
7534 bytes = fwrite (buffer, 1, bytes, file);
7536 perror_with_name (local_file);
7539 discard_cleanups (close_cleanup);
7540 if (remote_hostio_close (fd, &remote_errno))
7541 remote_hostio_error (remote_errno);
7544 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
7545 do_cleanups (back_to);
7549 remote_file_delete (const char *remote_file, int from_tty)
7551 int retcode, remote_errno;
7554 error (_("command can only be used with remote target"));
7556 retcode = remote_hostio_unlink (remote_file, &remote_errno);
7558 remote_hostio_error (remote_errno);
7561 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
7565 remote_put_command (char *args, int from_tty)
7567 struct cleanup *back_to;
7571 error_no_arg (_("file to put"));
7573 argv = gdb_buildargv (args);
7574 back_to = make_cleanup_freeargv (argv);
7575 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
7576 error (_("Invalid parameters to remote put"));
7578 remote_file_put (argv[0], argv[1], from_tty);
7580 do_cleanups (back_to);
7584 remote_get_command (char *args, int from_tty)
7586 struct cleanup *back_to;
7590 error_no_arg (_("file to get"));
7592 argv = gdb_buildargv (args);
7593 back_to = make_cleanup_freeargv (argv);
7594 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
7595 error (_("Invalid parameters to remote get"));
7597 remote_file_get (argv[0], argv[1], from_tty);
7599 do_cleanups (back_to);
7603 remote_delete_command (char *args, int from_tty)
7605 struct cleanup *back_to;
7609 error_no_arg (_("file to delete"));
7611 argv = gdb_buildargv (args);
7612 back_to = make_cleanup_freeargv (argv);
7613 if (argv[0] == NULL || argv[1] != NULL)
7614 error (_("Invalid parameters to remote delete"));
7616 remote_file_delete (argv[0], from_tty);
7618 do_cleanups (back_to);
7622 remote_command (char *args, int from_tty)
7624 help_list (remote_cmdlist, "remote ", -1, gdb_stdout);
7628 init_remote_ops (void)
7630 remote_ops.to_shortname = "remote";
7631 remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
7633 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
7634 Specify the serial device it is connected to\n\
7635 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
7636 remote_ops.to_open = remote_open;
7637 remote_ops.to_close = remote_close;
7638 remote_ops.to_detach = remote_detach;
7639 remote_ops.to_disconnect = remote_disconnect;
7640 remote_ops.to_resume = remote_resume;
7641 remote_ops.to_wait = remote_wait;
7642 remote_ops.to_fetch_registers = remote_fetch_registers;
7643 remote_ops.to_store_registers = remote_store_registers;
7644 remote_ops.to_prepare_to_store = remote_prepare_to_store;
7645 remote_ops.deprecated_xfer_memory = remote_xfer_memory;
7646 remote_ops.to_files_info = remote_files_info;
7647 remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
7648 remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
7649 remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
7650 remote_ops.to_stopped_data_address = remote_stopped_data_address;
7651 remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
7652 remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
7653 remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
7654 remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
7655 remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
7656 remote_ops.to_kill = remote_kill;
7657 remote_ops.to_load = generic_load;
7658 remote_ops.to_mourn_inferior = remote_mourn;
7659 remote_ops.to_thread_alive = remote_thread_alive;
7660 remote_ops.to_find_new_threads = remote_threads_info;
7661 remote_ops.to_pid_to_str = remote_pid_to_str;
7662 remote_ops.to_extra_thread_info = remote_threads_extra_info;
7663 remote_ops.to_stop = remote_stop;
7664 remote_ops.to_xfer_partial = remote_xfer_partial;
7665 remote_ops.to_rcmd = remote_rcmd;
7666 remote_ops.to_log_command = serial_log_command;
7667 remote_ops.to_get_thread_local_address = remote_get_thread_local_address;
7668 remote_ops.to_stratum = process_stratum;
7669 remote_ops.to_has_all_memory = 1;
7670 remote_ops.to_has_memory = 1;
7671 remote_ops.to_has_stack = 1;
7672 remote_ops.to_has_registers = 1;
7673 remote_ops.to_has_execution = 1;
7674 remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
7675 remote_ops.to_magic = OPS_MAGIC;
7676 remote_ops.to_memory_map = remote_memory_map;
7677 remote_ops.to_flash_erase = remote_flash_erase;
7678 remote_ops.to_flash_done = remote_flash_done;
7679 remote_ops.to_read_description = remote_read_description;
7680 remote_ops.to_search_memory = remote_search_memory;
7681 remote_ops.to_can_async_p = remote_can_async_p;
7682 remote_ops.to_is_async_p = remote_is_async_p;
7683 remote_ops.to_async = remote_async;
7684 remote_ops.to_async_mask = remote_async_mask;
7685 remote_ops.to_terminal_inferior = remote_terminal_inferior;
7686 remote_ops.to_terminal_ours = remote_terminal_ours;
7689 /* Set up the extended remote vector by making a copy of the standard
7690 remote vector and adding to it. */
7693 init_extended_remote_ops (void)
7695 extended_remote_ops = remote_ops;
7697 extended_remote_ops.to_shortname = "extended-remote";
7698 extended_remote_ops.to_longname =
7699 "Extended remote serial target in gdb-specific protocol";
7700 extended_remote_ops.to_doc =
7701 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
7702 Specify the serial device it is connected to (e.g. /dev/ttya).";
7703 extended_remote_ops.to_open = extended_remote_open;
7704 extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
7705 extended_remote_ops.to_mourn_inferior = extended_remote_mourn;
7706 extended_remote_ops.to_detach = extended_remote_detach;
7707 extended_remote_ops.to_attach = extended_remote_attach;
7708 extended_remote_ops.to_kill = extended_remote_kill;
7712 remote_can_async_p (void)
7714 if (!target_async_permitted)
7715 /* We only enable async when the user specifically asks for it. */
7718 /* We're async whenever the serial device is. */
7719 return remote_async_mask_value && serial_can_async_p (remote_desc);
7723 remote_is_async_p (void)
7725 if (!target_async_permitted)
7726 /* We only enable async when the user specifically asks for it. */
7729 /* We're async whenever the serial device is. */
7730 return remote_async_mask_value && serial_is_async_p (remote_desc);
7733 /* Pass the SERIAL event on and up to the client. One day this code
7734 will be able to delay notifying the client of an event until the
7735 point where an entire packet has been received. */
7737 static void (*async_client_callback) (enum inferior_event_type event_type,
7739 static void *async_client_context;
7740 static serial_event_ftype remote_async_serial_handler;
7743 remote_async_serial_handler (struct serial *scb, void *context)
7745 /* Don't propogate error information up to the client. Instead let
7746 the client find out about the error by querying the target. */
7747 async_client_callback (INF_REG_EVENT, async_client_context);
7751 remote_async (void (*callback) (enum inferior_event_type event_type,
7752 void *context), void *context)
7754 if (remote_async_mask_value == 0)
7755 internal_error (__FILE__, __LINE__,
7756 _("Calling remote_async when async is masked"));
7758 if (callback != NULL)
7760 serial_async (remote_desc, remote_async_serial_handler, NULL);
7761 async_client_callback = callback;
7762 async_client_context = context;
7765 serial_async (remote_desc, NULL, NULL);
7769 remote_async_mask (int new_mask)
7771 int curr_mask = remote_async_mask_value;
7772 remote_async_mask_value = new_mask;
7777 set_remote_cmd (char *args, int from_tty)
7779 help_list (remote_set_cmdlist, "set remote ", -1, gdb_stdout);
7783 show_remote_cmd (char *args, int from_tty)
7785 /* We can't just use cmd_show_list here, because we want to skip
7786 the redundant "show remote Z-packet" and the legacy aliases. */
7787 struct cleanup *showlist_chain;
7788 struct cmd_list_element *list = remote_show_cmdlist;
7790 showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist");
7791 for (; list != NULL; list = list->next)
7792 if (strcmp (list->name, "Z-packet") == 0)
7794 else if (list->type == not_set_cmd)
7795 /* Alias commands are exactly like the original, except they
7796 don't have the normal type. */
7800 struct cleanup *option_chain
7801 = make_cleanup_ui_out_tuple_begin_end (uiout, "option");
7802 ui_out_field_string (uiout, "name", list->name);
7803 ui_out_text (uiout, ": ");
7804 if (list->type == show_cmd)
7805 do_setshow_command ((char *) NULL, from_tty, list);
7807 cmd_func (list, NULL, from_tty);
7808 /* Close the tuple. */
7809 do_cleanups (option_chain);
7812 /* Close the tuple. */
7813 do_cleanups (showlist_chain);
7817 /* Function to be called whenever a new objfile (shlib) is detected. */
7819 remote_new_objfile (struct objfile *objfile)
7821 if (remote_desc != 0) /* Have a remote connection. */
7822 remote_check_symbols (objfile);
7826 _initialize_remote (void)
7828 struct remote_state *rs;
7830 /* architecture specific data */
7831 remote_gdbarch_data_handle =
7832 gdbarch_data_register_post_init (init_remote_state);
7833 remote_g_packet_data_handle =
7834 gdbarch_data_register_pre_init (remote_g_packet_data_init);
7836 /* Initialize the per-target state. At the moment there is only one
7837 of these, not one per target. Only one target is active at a
7838 time. The default buffer size is unimportant; it will be expanded
7839 whenever a larger buffer is needed. */
7840 rs = get_remote_state_raw ();
7842 rs->buf = xmalloc (rs->buf_size);
7845 add_target (&remote_ops);
7847 init_extended_remote_ops ();
7848 add_target (&extended_remote_ops);
7850 /* Hook into new objfile notification. */
7851 observer_attach_new_objfile (remote_new_objfile);
7853 /* Set up signal handlers. */
7854 sigint_remote_token =
7855 create_async_signal_handler (async_remote_interrupt, NULL);
7856 sigint_remote_twice_token =
7857 create_async_signal_handler (inferior_event_handler_wrapper, NULL);
7860 init_remote_threadtests ();
7863 /* set/show remote ... */
7865 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
7866 Remote protocol specific variables\n\
7867 Configure various remote-protocol specific variables such as\n\
7868 the packets being used"),
7869 &remote_set_cmdlist, "set remote ",
7870 0 /* allow-unknown */, &setlist);
7871 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
7872 Remote protocol specific variables\n\
7873 Configure various remote-protocol specific variables such as\n\
7874 the packets being used"),
7875 &remote_show_cmdlist, "show remote ",
7876 0 /* allow-unknown */, &showlist);
7878 add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
7879 Compare section data on target to the exec file.\n\
7880 Argument is a single section name (default: all loaded sections)."),
7883 add_cmd ("packet", class_maintenance, packet_command, _("\
7884 Send an arbitrary packet to a remote target.\n\
7885 maintenance packet TEXT\n\
7886 If GDB is talking to an inferior via the GDB serial protocol, then\n\
7887 this command sends the string TEXT to the inferior, and displays the\n\
7888 response packet. GDB supplies the initial `$' character, and the\n\
7889 terminating `#' character and checksum."),
7892 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
7893 Set whether to send break if interrupted."), _("\
7894 Show whether to send break if interrupted."), _("\
7895 If set, a break, instead of a cntrl-c, is sent to the remote target."),
7896 NULL, NULL, /* FIXME: i18n: Whether to send break if interrupted is %s. */
7897 &setlist, &showlist);
7899 /* Install commands for configuring memory read/write packets. */
7901 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
7902 Set the maximum number of bytes per memory write packet (deprecated)."),
7904 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
7905 Show the maximum number of bytes per memory write packet (deprecated)."),
7907 add_cmd ("memory-write-packet-size", no_class,
7908 set_memory_write_packet_size, _("\
7909 Set the maximum number of bytes per memory-write packet.\n\
7910 Specify the number of bytes in a packet or 0 (zero) for the\n\
7911 default packet size. The actual limit is further reduced\n\
7912 dependent on the target. Specify ``fixed'' to disable the\n\
7913 further restriction and ``limit'' to enable that restriction."),
7914 &remote_set_cmdlist);
7915 add_cmd ("memory-read-packet-size", no_class,
7916 set_memory_read_packet_size, _("\
7917 Set the maximum number of bytes per memory-read packet.\n\
7918 Specify the number of bytes in a packet or 0 (zero) for the\n\
7919 default packet size. The actual limit is further reduced\n\
7920 dependent on the target. Specify ``fixed'' to disable the\n\
7921 further restriction and ``limit'' to enable that restriction."),
7922 &remote_set_cmdlist);
7923 add_cmd ("memory-write-packet-size", no_class,
7924 show_memory_write_packet_size,
7925 _("Show the maximum number of bytes per memory-write packet."),
7926 &remote_show_cmdlist);
7927 add_cmd ("memory-read-packet-size", no_class,
7928 show_memory_read_packet_size,
7929 _("Show the maximum number of bytes per memory-read packet."),
7930 &remote_show_cmdlist);
7932 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class,
7933 &remote_hw_watchpoint_limit, _("\
7934 Set the maximum number of target hardware watchpoints."), _("\
7935 Show the maximum number of target hardware watchpoints."), _("\
7936 Specify a negative limit for unlimited."),
7937 NULL, NULL, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
7938 &remote_set_cmdlist, &remote_show_cmdlist);
7939 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class,
7940 &remote_hw_breakpoint_limit, _("\
7941 Set the maximum number of target hardware breakpoints."), _("\
7942 Show the maximum number of target hardware breakpoints."), _("\
7943 Specify a negative limit for unlimited."),
7944 NULL, NULL, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
7945 &remote_set_cmdlist, &remote_show_cmdlist);
7947 add_setshow_integer_cmd ("remoteaddresssize", class_obscure,
7948 &remote_address_size, _("\
7949 Set the maximum size of the address (in bits) in a memory packet."), _("\
7950 Show the maximum size of the address (in bits) in a memory packet."), NULL,
7952 NULL, /* FIXME: i18n: */
7953 &setlist, &showlist);
7955 add_packet_config_cmd (&remote_protocol_packets[PACKET_X],
7956 "X", "binary-download", 1);
7958 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont],
7959 "vCont", "verbose-resume", 0);
7961 add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals],
7962 "QPassSignals", "pass-signals", 0);
7964 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol],
7965 "qSymbol", "symbol-lookup", 0);
7967 add_packet_config_cmd (&remote_protocol_packets[PACKET_P],
7968 "P", "set-register", 1);
7970 add_packet_config_cmd (&remote_protocol_packets[PACKET_p],
7971 "p", "fetch-register", 1);
7973 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0],
7974 "Z0", "software-breakpoint", 0);
7976 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1],
7977 "Z1", "hardware-breakpoint", 0);
7979 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2],
7980 "Z2", "write-watchpoint", 0);
7982 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3],
7983 "Z3", "read-watchpoint", 0);
7985 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4],
7986 "Z4", "access-watchpoint", 0);
7988 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv],
7989 "qXfer:auxv:read", "read-aux-vector", 0);
7991 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features],
7992 "qXfer:features:read", "target-features", 0);
7994 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries],
7995 "qXfer:libraries:read", "library-info", 0);
7997 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map],
7998 "qXfer:memory-map:read", "memory-map", 0);
8000 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read],
8001 "qXfer:spu:read", "read-spu-object", 0);
8003 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write],
8004 "qXfer:spu:write", "write-spu-object", 0);
8006 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
8007 "qGetTLSAddr", "get-thread-local-storage-address",
8010 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported],
8011 "qSupported", "supported-packets", 0);
8013 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory],
8014 "qSearch:memory", "search-memory", 0);
8016 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open],
8017 "vFile:open", "hostio-open", 0);
8019 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread],
8020 "vFile:pread", "hostio-pread", 0);
8022 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite],
8023 "vFile:pwrite", "hostio-pwrite", 0);
8025 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close],
8026 "vFile:close", "hostio-close", 0);
8028 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink],
8029 "vFile:unlink", "hostio-unlink", 0);
8031 add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach],
8032 "vAttach", "attach", 0);
8034 add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
8037 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode],
8038 "QStartNoAckMode", "noack", 0);
8040 add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill],
8041 "vKill", "kill", 0);
8043 /* Keep the old ``set remote Z-packet ...'' working. Each individual
8044 Z sub-packet has its own set and show commands, but users may
8045 have sets to this variable in their .gdbinit files (or in their
8047 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
8048 &remote_Z_packet_detect, _("\
8049 Set use of remote protocol `Z' packets"), _("\
8050 Show use of remote protocol `Z' packets "), _("\
8051 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
8053 set_remote_protocol_Z_packet_cmd,
8054 show_remote_protocol_Z_packet_cmd, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
8055 &remote_set_cmdlist, &remote_show_cmdlist);
8057 add_prefix_cmd ("remote", class_files, remote_command, _("\
8058 Manipulate files on the remote system\n\
8059 Transfer files to and from the remote target system."),
8060 &remote_cmdlist, "remote ",
8061 0 /* allow-unknown */, &cmdlist);
8063 add_cmd ("put", class_files, remote_put_command,
8064 _("Copy a local file to the remote system."),
8067 add_cmd ("get", class_files, remote_get_command,
8068 _("Copy a remote file to the local system."),
8071 add_cmd ("delete", class_files, remote_delete_command,
8072 _("Delete a remote file."),
8075 remote_exec_file = xstrdup ("");
8076 add_setshow_string_noescape_cmd ("exec-file", class_files,
8077 &remote_exec_file, _("\
8078 Set the remote pathname for \"run\""), _("\
8079 Show the remote pathname for \"run\""), NULL, NULL, NULL,
8080 &remote_set_cmdlist, &remote_show_cmdlist);
8082 /* Eventually initialize fileio. See fileio.c */
8083 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
8085 /* Take advantage of the fact that the LWP field is not used, to tag
8086 special ptids with it set to != 0. */
8087 magic_null_ptid = ptid_build (42000, 1, -1);
8088 not_sent_ptid = ptid_build (42000, 1, -2);
8089 any_thread_ptid = ptid_build (42000, 1, 0);