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);
1250 /* Return nonzero if the thread PTID is still alive on the remote
1254 remote_thread_alive (ptid_t ptid)
1256 struct remote_state *rs = get_remote_state ();
1257 int tid = ptid_get_tid (ptid);
1260 if (ptid_equal (ptid, magic_null_ptid))
1261 /* The main thread is always alive. */
1264 if (ptid_get_pid (ptid) != 0 && ptid_get_tid (ptid) == 0)
1265 /* The main thread is always alive. This can happen after a
1266 vAttach, if the remote side doesn't support
1271 endp = rs->buf + get_remote_packet_size ();
1274 write_ptid (p, endp, ptid);
1277 getpkt (&rs->buf, &rs->buf_size, 0);
1278 return (rs->buf[0] == 'O' && rs->buf[1] == 'K');
1281 /* About these extended threadlist and threadinfo packets. They are
1282 variable length packets but, the fields within them are often fixed
1283 length. They are redundent enough to send over UDP as is the
1284 remote protocol in general. There is a matching unit test module
1287 #define OPAQUETHREADBYTES 8
1289 /* a 64 bit opaque identifier */
1290 typedef unsigned char threadref[OPAQUETHREADBYTES];
1292 /* WARNING: This threadref data structure comes from the remote O.S.,
1293 libstub protocol encoding, and remote.c. it is not particularly
1296 /* Right now, the internal structure is int. We want it to be bigger.
1300 typedef int gdb_threadref; /* Internal GDB thread reference. */
1302 /* gdb_ext_thread_info is an internal GDB data structure which is
1303 equivalent to the reply of the remote threadinfo packet. */
1305 struct gdb_ext_thread_info
1307 threadref threadid; /* External form of thread reference. */
1308 int active; /* Has state interesting to GDB?
1310 char display[256]; /* Brief state display, name,
1311 blocked/suspended. */
1312 char shortname[32]; /* To be used to name threads. */
1313 char more_display[256]; /* Long info, statistics, queue depth,
1317 /* The volume of remote transfers can be limited by submitting
1318 a mask containing bits specifying the desired information.
1319 Use a union of these values as the 'selection' parameter to
1320 get_thread_info. FIXME: Make these TAG names more thread specific.
1323 #define TAG_THREADID 1
1324 #define TAG_EXISTS 2
1325 #define TAG_DISPLAY 4
1326 #define TAG_THREADNAME 8
1327 #define TAG_MOREDISPLAY 16
1329 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1331 char *unpack_varlen_hex (char *buff, ULONGEST *result);
1333 static char *unpack_nibble (char *buf, int *val);
1335 static char *pack_nibble (char *buf, int nibble);
1337 static char *pack_hex_byte (char *pkt, int /* unsigned char */ byte);
1339 static char *unpack_byte (char *buf, int *value);
1341 static char *pack_int (char *buf, int value);
1343 static char *unpack_int (char *buf, int *value);
1345 static char *unpack_string (char *src, char *dest, int length);
1347 static char *pack_threadid (char *pkt, threadref *id);
1349 static char *unpack_threadid (char *inbuf, threadref *id);
1351 void int_to_threadref (threadref *id, int value);
1353 static int threadref_to_int (threadref *ref);
1355 static void copy_threadref (threadref *dest, threadref *src);
1357 static int threadmatch (threadref *dest, threadref *src);
1359 static char *pack_threadinfo_request (char *pkt, int mode,
1362 static int remote_unpack_thread_info_response (char *pkt,
1363 threadref *expectedref,
1364 struct gdb_ext_thread_info
1368 static int remote_get_threadinfo (threadref *threadid,
1369 int fieldset, /*TAG mask */
1370 struct gdb_ext_thread_info *info);
1372 static char *pack_threadlist_request (char *pkt, int startflag,
1374 threadref *nextthread);
1376 static int parse_threadlist_response (char *pkt,
1378 threadref *original_echo,
1379 threadref *resultlist,
1382 static int remote_get_threadlist (int startflag,
1383 threadref *nextthread,
1387 threadref *threadlist);
1389 typedef int (*rmt_thread_action) (threadref *ref, void *context);
1391 static int remote_threadlist_iterator (rmt_thread_action stepfunction,
1392 void *context, int looplimit);
1394 static int remote_newthread_step (threadref *ref, void *context);
1397 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
1398 buffer we're allowed to write to. Returns
1399 BUF+CHARACTERS_WRITTEN. */
1402 write_ptid (char *buf, const char *endbuf, ptid_t ptid)
1405 struct remote_state *rs = get_remote_state ();
1407 if (remote_multi_process_p (rs))
1409 pid = ptid_get_pid (ptid);
1411 buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid);
1413 buf += xsnprintf (buf, endbuf - buf, "p%x.", pid);
1415 tid = ptid_get_tid (ptid);
1417 buf += xsnprintf (buf, endbuf - buf, "-%x", -tid);
1419 buf += xsnprintf (buf, endbuf - buf, "%x", tid);
1424 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
1425 passed the last parsed char. Returns null_ptid on error. */
1428 read_ptid (char *buf, char **obuf)
1432 ULONGEST pid = 0, tid = 0;
1437 /* Multi-process ptid. */
1438 pp = unpack_varlen_hex (p + 1, &pid);
1440 error (_("invalid remote ptid: %s\n"), p);
1443 pp = unpack_varlen_hex (p + 1, &tid);
1446 return ptid_build (pid, 0, tid);
1449 /* No multi-process. Just a tid. */
1450 pp = unpack_varlen_hex (p, &tid);
1452 /* Since the stub is not sending a process id, then default to
1453 what's in inferior_ptid. */
1454 pid = ptid_get_pid (inferior_ptid);
1458 return ptid_build (pid, 0, tid);
1461 /* Encode 64 bits in 16 chars of hex. */
1463 static const char hexchars[] = "0123456789abcdef";
1466 ishex (int ch, int *val)
1468 if ((ch >= 'a') && (ch <= 'f'))
1470 *val = ch - 'a' + 10;
1473 if ((ch >= 'A') && (ch <= 'F'))
1475 *val = ch - 'A' + 10;
1478 if ((ch >= '0') && (ch <= '9'))
1489 if (ch >= 'a' && ch <= 'f')
1490 return ch - 'a' + 10;
1491 if (ch >= '0' && ch <= '9')
1493 if (ch >= 'A' && ch <= 'F')
1494 return ch - 'A' + 10;
1499 stub_unpack_int (char *buff, int fieldlength)
1506 nibble = stubhex (*buff++);
1510 retval = retval << 4;
1516 unpack_varlen_hex (char *buff, /* packet to parse */
1520 ULONGEST retval = 0;
1522 while (ishex (*buff, &nibble))
1525 retval = retval << 4;
1526 retval |= nibble & 0x0f;
1533 unpack_nibble (char *buf, int *val)
1535 *val = fromhex (*buf++);
1540 pack_nibble (char *buf, int nibble)
1542 *buf++ = hexchars[(nibble & 0x0f)];
1547 pack_hex_byte (char *pkt, int byte)
1549 *pkt++ = hexchars[(byte >> 4) & 0xf];
1550 *pkt++ = hexchars[(byte & 0xf)];
1555 unpack_byte (char *buf, int *value)
1557 *value = stub_unpack_int (buf, 2);
1562 pack_int (char *buf, int value)
1564 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
1565 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
1566 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
1567 buf = pack_hex_byte (buf, (value & 0xff));
1572 unpack_int (char *buf, int *value)
1574 *value = stub_unpack_int (buf, 8);
1578 #if 0 /* Currently unused, uncomment when needed. */
1579 static char *pack_string (char *pkt, char *string);
1582 pack_string (char *pkt, char *string)
1587 len = strlen (string);
1589 len = 200; /* Bigger than most GDB packets, junk??? */
1590 pkt = pack_hex_byte (pkt, len);
1594 if ((ch == '\0') || (ch == '#'))
1595 ch = '*'; /* Protect encapsulation. */
1600 #endif /* 0 (unused) */
1603 unpack_string (char *src, char *dest, int length)
1612 pack_threadid (char *pkt, threadref *id)
1615 unsigned char *altid;
1617 altid = (unsigned char *) id;
1618 limit = pkt + BUF_THREAD_ID_SIZE;
1620 pkt = pack_hex_byte (pkt, *altid++);
1626 unpack_threadid (char *inbuf, threadref *id)
1629 char *limit = inbuf + BUF_THREAD_ID_SIZE;
1632 altref = (char *) id;
1634 while (inbuf < limit)
1636 x = stubhex (*inbuf++);
1637 y = stubhex (*inbuf++);
1638 *altref++ = (x << 4) | y;
1643 /* Externally, threadrefs are 64 bits but internally, they are still
1644 ints. This is due to a mismatch of specifications. We would like
1645 to use 64bit thread references internally. This is an adapter
1649 int_to_threadref (threadref *id, int value)
1651 unsigned char *scan;
1653 scan = (unsigned char *) id;
1659 *scan++ = (value >> 24) & 0xff;
1660 *scan++ = (value >> 16) & 0xff;
1661 *scan++ = (value >> 8) & 0xff;
1662 *scan++ = (value & 0xff);
1666 threadref_to_int (threadref *ref)
1669 unsigned char *scan;
1675 value = (value << 8) | ((*scan++) & 0xff);
1680 copy_threadref (threadref *dest, threadref *src)
1683 unsigned char *csrc, *cdest;
1685 csrc = (unsigned char *) src;
1686 cdest = (unsigned char *) dest;
1693 threadmatch (threadref *dest, threadref *src)
1695 /* Things are broken right now, so just assume we got a match. */
1697 unsigned char *srcp, *destp;
1699 srcp = (char *) src;
1700 destp = (char *) dest;
1704 result &= (*srcp++ == *destp++) ? 1 : 0;
1711 threadid:1, # always request threadid
1718 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1721 pack_threadinfo_request (char *pkt, int mode, threadref *id)
1723 *pkt++ = 'q'; /* Info Query */
1724 *pkt++ = 'P'; /* process or thread info */
1725 pkt = pack_int (pkt, mode); /* mode */
1726 pkt = pack_threadid (pkt, id); /* threadid */
1727 *pkt = '\0'; /* terminate */
1731 /* These values tag the fields in a thread info response packet. */
1732 /* Tagging the fields allows us to request specific fields and to
1733 add more fields as time goes by. */
1735 #define TAG_THREADID 1 /* Echo the thread identifier. */
1736 #define TAG_EXISTS 2 /* Is this process defined enough to
1737 fetch registers and its stack? */
1738 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1739 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
1740 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1744 remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
1745 struct gdb_ext_thread_info *info)
1747 struct remote_state *rs = get_remote_state ();
1751 char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */
1754 /* info->threadid = 0; FIXME: implement zero_threadref. */
1756 info->display[0] = '\0';
1757 info->shortname[0] = '\0';
1758 info->more_display[0] = '\0';
1760 /* Assume the characters indicating the packet type have been
1762 pkt = unpack_int (pkt, &mask); /* arg mask */
1763 pkt = unpack_threadid (pkt, &ref);
1766 warning (_("Incomplete response to threadinfo request."));
1767 if (!threadmatch (&ref, expectedref))
1768 { /* This is an answer to a different request. */
1769 warning (_("ERROR RMT Thread info mismatch."));
1772 copy_threadref (&info->threadid, &ref);
1774 /* Loop on tagged fields , try to bail if somthing goes wrong. */
1776 /* Packets are terminated with nulls. */
1777 while ((pkt < limit) && mask && *pkt)
1779 pkt = unpack_int (pkt, &tag); /* tag */
1780 pkt = unpack_byte (pkt, &length); /* length */
1781 if (!(tag & mask)) /* Tags out of synch with mask. */
1783 warning (_("ERROR RMT: threadinfo tag mismatch."));
1787 if (tag == TAG_THREADID)
1791 warning (_("ERROR RMT: length of threadid is not 16."));
1795 pkt = unpack_threadid (pkt, &ref);
1796 mask = mask & ~TAG_THREADID;
1799 if (tag == TAG_EXISTS)
1801 info->active = stub_unpack_int (pkt, length);
1803 mask = mask & ~(TAG_EXISTS);
1806 warning (_("ERROR RMT: 'exists' length too long."));
1812 if (tag == TAG_THREADNAME)
1814 pkt = unpack_string (pkt, &info->shortname[0], length);
1815 mask = mask & ~TAG_THREADNAME;
1818 if (tag == TAG_DISPLAY)
1820 pkt = unpack_string (pkt, &info->display[0], length);
1821 mask = mask & ~TAG_DISPLAY;
1824 if (tag == TAG_MOREDISPLAY)
1826 pkt = unpack_string (pkt, &info->more_display[0], length);
1827 mask = mask & ~TAG_MOREDISPLAY;
1830 warning (_("ERROR RMT: unknown thread info tag."));
1831 break; /* Not a tag we know about. */
1837 remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
1838 struct gdb_ext_thread_info *info)
1840 struct remote_state *rs = get_remote_state ();
1843 pack_threadinfo_request (rs->buf, fieldset, threadid);
1845 getpkt (&rs->buf, &rs->buf_size, 0);
1847 if (rs->buf[0] == '\0')
1850 result = remote_unpack_thread_info_response (rs->buf + 2,
1855 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1858 pack_threadlist_request (char *pkt, int startflag, int threadcount,
1859 threadref *nextthread)
1861 *pkt++ = 'q'; /* info query packet */
1862 *pkt++ = 'L'; /* Process LIST or threadLIST request */
1863 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
1864 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
1865 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
1870 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1873 parse_threadlist_response (char *pkt, int result_limit,
1874 threadref *original_echo, threadref *resultlist,
1877 struct remote_state *rs = get_remote_state ();
1879 int count, resultcount, done;
1882 /* Assume the 'q' and 'M chars have been stripped. */
1883 limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE);
1884 /* done parse past here */
1885 pkt = unpack_byte (pkt, &count); /* count field */
1886 pkt = unpack_nibble (pkt, &done);
1887 /* The first threadid is the argument threadid. */
1888 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
1889 while ((count-- > 0) && (pkt < limit))
1891 pkt = unpack_threadid (pkt, resultlist++);
1892 if (resultcount++ >= result_limit)
1901 remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
1902 int *done, int *result_count, threadref *threadlist)
1904 struct remote_state *rs = get_remote_state ();
1905 static threadref echo_nextthread;
1908 /* Trancate result limit to be smaller than the packet size. */
1909 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= get_remote_packet_size ())
1910 result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2;
1912 pack_threadlist_request (rs->buf, startflag, result_limit, nextthread);
1914 getpkt (&rs->buf, &rs->buf_size, 0);
1916 if (*rs->buf == '\0')
1920 parse_threadlist_response (rs->buf + 2, result_limit, &echo_nextthread,
1923 if (!threadmatch (&echo_nextthread, nextthread))
1925 /* FIXME: This is a good reason to drop the packet. */
1926 /* Possably, there is a duplicate response. */
1928 retransmit immediatly - race conditions
1929 retransmit after timeout - yes
1931 wait for packet, then exit
1933 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
1934 return 0; /* I choose simply exiting. */
1936 if (*result_count <= 0)
1940 warning (_("RMT ERROR : failed to get remote thread list."));
1943 return result; /* break; */
1945 if (*result_count > result_limit)
1948 warning (_("RMT ERROR: threadlist response longer than requested."));
1954 /* This is the interface between remote and threads, remotes upper
1957 /* remote_find_new_threads retrieves the thread list and for each
1958 thread in the list, looks up the thread in GDB's internal list,
1959 adding the thread if it does not already exist. This involves
1960 getting partial thread lists from the remote target so, polling the
1961 quit_flag is required. */
1964 /* About this many threadisds fit in a packet. */
1966 #define MAXTHREADLISTRESULTS 32
1969 remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
1972 int done, i, result_count;
1976 static threadref nextthread;
1977 static threadref resultthreadlist[MAXTHREADLISTRESULTS];
1982 if (loopcount++ > looplimit)
1985 warning (_("Remote fetch threadlist -infinite loop-."));
1988 if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS,
1989 &done, &result_count, resultthreadlist))
1994 /* Clear for later iterations. */
1996 /* Setup to resume next batch of thread references, set nextthread. */
1997 if (result_count >= 1)
1998 copy_threadref (&nextthread, &resultthreadlist[result_count - 1]);
2000 while (result_count--)
2001 if (!(result = (*stepfunction) (&resultthreadlist[i++], context)))
2008 remote_newthread_step (threadref *ref, void *context)
2010 int pid = ptid_get_pid (inferior_ptid);
2011 ptid_t ptid = ptid_build (pid, 0, threadref_to_int (ref));
2013 if (!in_thread_list (ptid))
2015 return 1; /* continue iterator */
2018 #define CRAZY_MAX_THREADS 1000
2021 remote_current_thread (ptid_t oldpid)
2023 struct remote_state *rs = get_remote_state ();
2029 getpkt (&rs->buf, &rs->buf_size, 0);
2030 if (rs->buf[0] == 'Q' && rs->buf[1] == 'C')
2031 return read_ptid (&rs->buf[2], NULL);
2036 /* Find new threads for info threads command.
2037 * Original version, using John Metzler's thread protocol.
2041 remote_find_new_threads (void)
2043 remote_threadlist_iterator (remote_newthread_step, 0,
2048 * Find all threads for info threads command.
2049 * Uses new thread protocol contributed by Cisco.
2050 * Falls back and attempts to use the older method (above)
2051 * if the target doesn't respond to the new method.
2055 remote_threads_info (void)
2057 struct remote_state *rs = get_remote_state ();
2061 if (remote_desc == 0) /* paranoia */
2062 error (_("Command can only be used when connected to the remote target."));
2064 if (use_threadinfo_query)
2066 putpkt ("qfThreadInfo");
2067 getpkt (&rs->buf, &rs->buf_size, 0);
2069 if (bufp[0] != '\0') /* q packet recognized */
2071 while (*bufp++ == 'm') /* reply contains one or more TID */
2075 new_thread = read_ptid (bufp, &bufp);
2076 if (!ptid_equal (new_thread, null_ptid)
2077 && !in_thread_list (new_thread))
2079 if (!in_inferior_list (ptid_get_pid (new_thread)))
2080 /* When connected to a multi-process aware
2081 stub, "info threads" may show up threads of
2082 inferiors we didn't know about yet. Add
2084 add_inferior (ptid_get_pid (new_thread));
2086 add_thread (new_thread);
2089 while (*bufp++ == ','); /* comma-separated list */
2090 putpkt ("qsThreadInfo");
2091 getpkt (&rs->buf, &rs->buf_size, 0);
2098 /* Else fall back to old method based on jmetzler protocol. */
2099 use_threadinfo_query = 0;
2100 remote_find_new_threads ();
2105 * Collect a descriptive string about the given thread.
2106 * The target may say anything it wants to about the thread
2107 * (typically info about its blocked / runnable state, name, etc.).
2108 * This string will appear in the info threads display.
2110 * Optional: targets are not required to implement this function.
2114 remote_threads_extra_info (struct thread_info *tp)
2116 struct remote_state *rs = get_remote_state ();
2120 struct gdb_ext_thread_info threadinfo;
2121 static char display_buf[100]; /* arbitrary... */
2122 int n = 0; /* position in display_buf */
2124 if (remote_desc == 0) /* paranoia */
2125 internal_error (__FILE__, __LINE__,
2126 _("remote_threads_extra_info"));
2128 if (ptid_equal (tp->ptid, magic_null_ptid)
2129 || (ptid_get_pid (tp->ptid) != 0 && ptid_get_tid (tp->ptid) == 0))
2130 /* This is the main thread which was added by GDB. The remote
2131 server doesn't know about it. */
2134 if (use_threadextra_query)
2137 char *endb = rs->buf + get_remote_packet_size ();
2139 xsnprintf (b, endb - b, "qThreadExtraInfo,");
2141 write_ptid (b, endb, tp->ptid);
2144 getpkt (&rs->buf, &rs->buf_size, 0);
2145 if (rs->buf[0] != 0)
2147 n = min (strlen (rs->buf) / 2, sizeof (display_buf));
2148 result = hex2bin (rs->buf, (gdb_byte *) display_buf, n);
2149 display_buf [result] = '\0';
2154 /* If the above query fails, fall back to the old method. */
2155 use_threadextra_query = 0;
2156 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
2157 | TAG_MOREDISPLAY | TAG_DISPLAY;
2158 int_to_threadref (&id, ptid_get_tid (tp->ptid));
2159 if (remote_get_threadinfo (&id, set, &threadinfo))
2160 if (threadinfo.active)
2162 if (*threadinfo.shortname)
2163 n += xsnprintf (&display_buf[0], sizeof (display_buf) - n,
2164 " Name: %s,", threadinfo.shortname);
2165 if (*threadinfo.display)
2166 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
2167 " State: %s,", threadinfo.display);
2168 if (*threadinfo.more_display)
2169 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
2170 " Priority: %s", threadinfo.more_display);
2174 /* For purely cosmetic reasons, clear up trailing commas. */
2175 if (',' == display_buf[n-1])
2176 display_buf[n-1] = ' ';
2184 /* Restart the remote side; this is an extended protocol operation. */
2187 extended_remote_restart (void)
2189 struct remote_state *rs = get_remote_state ();
2191 /* Send the restart command; for reasons I don't understand the
2192 remote side really expects a number after the "R". */
2193 xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0);
2196 remote_fileio_reset ();
2199 /* Clean up connection to a remote debugger. */
2202 remote_close (int quitting)
2205 serial_close (remote_desc);
2209 /* Query the remote side for the text, data and bss offsets. */
2214 struct remote_state *rs = get_remote_state ();
2217 int lose, num_segments = 0, do_sections, do_segments;
2218 CORE_ADDR text_addr, data_addr, bss_addr, segments[2];
2219 struct section_offsets *offs;
2220 struct symfile_segment_data *data;
2222 if (symfile_objfile == NULL)
2225 putpkt ("qOffsets");
2226 getpkt (&rs->buf, &rs->buf_size, 0);
2229 if (buf[0] == '\000')
2230 return; /* Return silently. Stub doesn't support
2234 warning (_("Remote failure reply: %s"), buf);
2238 /* Pick up each field in turn. This used to be done with scanf, but
2239 scanf will make trouble if CORE_ADDR size doesn't match
2240 conversion directives correctly. The following code will work
2241 with any size of CORE_ADDR. */
2242 text_addr = data_addr = bss_addr = 0;
2246 if (strncmp (ptr, "Text=", 5) == 0)
2249 /* Don't use strtol, could lose on big values. */
2250 while (*ptr && *ptr != ';')
2251 text_addr = (text_addr << 4) + fromhex (*ptr++);
2253 if (strncmp (ptr, ";Data=", 6) == 0)
2256 while (*ptr && *ptr != ';')
2257 data_addr = (data_addr << 4) + fromhex (*ptr++);
2262 if (!lose && strncmp (ptr, ";Bss=", 5) == 0)
2265 while (*ptr && *ptr != ';')
2266 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
2268 if (bss_addr != data_addr)
2269 warning (_("Target reported unsupported offsets: %s"), buf);
2274 else if (strncmp (ptr, "TextSeg=", 8) == 0)
2277 /* Don't use strtol, could lose on big values. */
2278 while (*ptr && *ptr != ';')
2279 text_addr = (text_addr << 4) + fromhex (*ptr++);
2282 if (strncmp (ptr, ";DataSeg=", 9) == 0)
2285 while (*ptr && *ptr != ';')
2286 data_addr = (data_addr << 4) + fromhex (*ptr++);
2294 error (_("Malformed response to offset query, %s"), buf);
2295 else if (*ptr != '\0')
2296 warning (_("Target reported unsupported offsets: %s"), buf);
2298 offs = ((struct section_offsets *)
2299 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
2300 memcpy (offs, symfile_objfile->section_offsets,
2301 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
2303 data = get_symfile_segment_data (symfile_objfile->obfd);
2304 do_segments = (data != NULL);
2305 do_sections = num_segments == 0;
2307 if (num_segments > 0)
2309 segments[0] = text_addr;
2310 segments[1] = data_addr;
2312 /* If we have two segments, we can still try to relocate everything
2313 by assuming that the .text and .data offsets apply to the whole
2314 text and data segments. Convert the offsets given in the packet
2315 to base addresses for symfile_map_offsets_to_segments. */
2316 else if (data && data->num_segments == 2)
2318 segments[0] = data->segment_bases[0] + text_addr;
2319 segments[1] = data->segment_bases[1] + data_addr;
2322 /* If the object file has only one segment, assume that it is text
2323 rather than data; main programs with no writable data are rare,
2324 but programs with no code are useless. Of course the code might
2325 have ended up in the data segment... to detect that we would need
2326 the permissions here. */
2327 else if (data && data->num_segments == 1)
2329 segments[0] = data->segment_bases[0] + text_addr;
2332 /* There's no way to relocate by segment. */
2338 int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data,
2339 offs, num_segments, segments);
2341 if (ret == 0 && !do_sections)
2342 error (_("Can not handle qOffsets TextSeg response with this symbol file"));
2349 free_symfile_segment_data (data);
2353 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
2355 /* This is a temporary kludge to force data and bss to use the same offsets
2356 because that's what nlmconv does now. The real solution requires changes
2357 to the stub and remote.c that I don't have time to do right now. */
2359 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
2360 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
2363 objfile_relocate (symfile_objfile, offs);
2366 /* Stub for catch_exception. */
2368 struct start_remote_args
2372 /* The current target. */
2373 struct target_ops *target;
2375 /* Non-zero if this is an extended-remote target. */
2380 remote_start_remote (struct ui_out *uiout, void *opaque)
2382 struct start_remote_args *args = opaque;
2383 struct remote_state *rs = get_remote_state ();
2384 struct packet_config *noack_config;
2385 char *wait_status = NULL;
2387 immediate_quit++; /* Allow user to interrupt it. */
2389 /* Ack any packet which the remote side has already sent. */
2390 serial_write (remote_desc, "+", 1);
2392 /* The first packet we send to the target is the optional "supported
2393 packets" request. If the target can answer this, it will tell us
2394 which later probes to skip. */
2395 remote_query_supported ();
2397 /* Next, we possibly activate noack mode.
2399 If the QStartNoAckMode packet configuration is set to AUTO,
2400 enable noack mode if the stub reported a wish for it with
2403 If set to TRUE, then enable noack mode even if the stub didn't
2404 report it in qSupported. If the stub doesn't reply OK, the
2405 session ends with an error.
2407 If FALSE, then don't activate noack mode, regardless of what the
2408 stub claimed should be the default with qSupported. */
2410 noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode];
2412 if (noack_config->detect == AUTO_BOOLEAN_TRUE
2413 || (noack_config->detect == AUTO_BOOLEAN_AUTO
2414 && noack_config->support == PACKET_ENABLE))
2416 putpkt ("QStartNoAckMode");
2417 getpkt (&rs->buf, &rs->buf_size, 0);
2418 if (packet_ok (rs->buf, noack_config) == PACKET_OK)
2422 /* Next, if the target can specify a description, read it. We do
2423 this before anything involving memory or registers. */
2424 target_find_description ();
2426 /* Check whether the target is running now. */
2428 getpkt (&rs->buf, &rs->buf_size, 0);
2430 if (rs->buf[0] == 'W' || rs->buf[0] == 'X')
2432 if (args->extended_p)
2434 /* We're connected, but not running. Drop out before we
2435 call start_remote. */
2436 target_mark_exited (args->target);
2440 error (_("The target is not running (try extended-remote?)"));
2444 if (args->extended_p)
2445 target_mark_running (args->target);
2447 /* Save the reply for later. */
2448 wait_status = alloca (strlen (rs->buf) + 1);
2449 strcpy (wait_status, rs->buf);
2453 init_thread_list ();
2455 /* Let the stub know that we want it to return the thread. */
2456 set_continue_thread (minus_one_ptid);
2458 /* Without this, some commands which require an active target
2459 (such as kill) won't work. This variable serves (at least)
2460 double duty as both the pid of the target process (if it has
2461 such), and as a flag indicating that a target is active.
2462 These functions should be split out into seperate variables,
2463 especially since GDB will someday have a notion of debugging
2464 several processes. */
2465 inferior_ptid = magic_null_ptid;
2467 /* Now, if we have thread information, update inferior_ptid. */
2468 inferior_ptid = remote_current_thread (inferior_ptid);
2470 add_inferior (ptid_get_pid (inferior_ptid));
2472 /* Always add the main thread. */
2473 add_thread_silent (inferior_ptid);
2475 get_offsets (); /* Get text, data & bss offsets. */
2477 /* Use the previously fetched status. */
2478 gdb_assert (wait_status != NULL);
2479 strcpy (rs->buf, wait_status);
2480 rs->cached_wait_status = 1;
2483 start_remote (args->from_tty); /* Initialize gdb process mechanisms. */
2485 if (args->extended_p)
2487 /* Tell the remote that we are using the extended protocol. */
2489 getpkt (&rs->buf, &rs->buf_size, 0);
2492 /* If we connected to a live target, do some additional setup. */
2493 if (target_has_execution)
2495 if (exec_bfd) /* No use without an exec file. */
2496 remote_check_symbols (symfile_objfile);
2500 /* Open a connection to a remote debugger.
2501 NAME is the filename used for communication. */
2504 remote_open (char *name, int from_tty)
2506 remote_open_1 (name, from_tty, &remote_ops, 0);
2509 /* Open a connection to a remote debugger using the extended
2510 remote gdb protocol. NAME is the filename used for communication. */
2513 extended_remote_open (char *name, int from_tty)
2515 remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */);
2518 /* Generic code for opening a connection to a remote target. */
2521 init_all_packet_configs (void)
2524 for (i = 0; i < PACKET_MAX; i++)
2525 update_packet_config (&remote_protocol_packets[i]);
2528 /* Symbol look-up. */
2531 remote_check_symbols (struct objfile *objfile)
2533 struct remote_state *rs = get_remote_state ();
2534 char *msg, *reply, *tmp;
2535 struct minimal_symbol *sym;
2538 if (remote_protocol_packets[PACKET_qSymbol].support == PACKET_DISABLE)
2541 /* Allocate a message buffer. We can't reuse the input buffer in RS,
2542 because we need both at the same time. */
2543 msg = alloca (get_remote_packet_size ());
2545 /* Invite target to request symbol lookups. */
2547 putpkt ("qSymbol::");
2548 getpkt (&rs->buf, &rs->buf_size, 0);
2549 packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSymbol]);
2552 while (strncmp (reply, "qSymbol:", 8) == 0)
2555 end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2);
2557 sym = lookup_minimal_symbol (msg, NULL, NULL);
2559 xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]);
2562 CORE_ADDR sym_addr = SYMBOL_VALUE_ADDRESS (sym);
2564 /* If this is a function address, return the start of code
2565 instead of any data function descriptor. */
2566 sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch,
2570 xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s",
2571 paddr_nz (sym_addr), &reply[8]);
2575 getpkt (&rs->buf, &rs->buf_size, 0);
2580 static struct serial *
2581 remote_serial_open (char *name)
2583 static int udp_warning = 0;
2585 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2586 of in ser-tcp.c, because it is the remote protocol assuming that the
2587 serial connection is reliable and not the serial connection promising
2589 if (!udp_warning && strncmp (name, "udp:", 4) == 0)
2592 The remote protocol may be unreliable over UDP.\n\
2593 Some events may be lost, rendering further debugging impossible."));
2597 return serial_open (name);
2600 /* This type describes each known response to the qSupported
2602 struct protocol_feature
2604 /* The name of this protocol feature. */
2607 /* The default for this protocol feature. */
2608 enum packet_support default_support;
2610 /* The function to call when this feature is reported, or after
2611 qSupported processing if the feature is not supported.
2612 The first argument points to this structure. The second
2613 argument indicates whether the packet requested support be
2614 enabled, disabled, or probed (or the default, if this function
2615 is being called at the end of processing and this feature was
2616 not reported). The third argument may be NULL; if not NULL, it
2617 is a NUL-terminated string taken from the packet following
2618 this feature's name and an equals sign. */
2619 void (*func) (const struct protocol_feature *, enum packet_support,
2622 /* The corresponding packet for this feature. Only used if
2623 FUNC is remote_supported_packet. */
2628 remote_supported_packet (const struct protocol_feature *feature,
2629 enum packet_support support,
2630 const char *argument)
2634 warning (_("Remote qSupported response supplied an unexpected value for"
2635 " \"%s\"."), feature->name);
2639 if (remote_protocol_packets[feature->packet].support
2640 == PACKET_SUPPORT_UNKNOWN)
2641 remote_protocol_packets[feature->packet].support = support;
2645 remote_packet_size (const struct protocol_feature *feature,
2646 enum packet_support support, const char *value)
2648 struct remote_state *rs = get_remote_state ();
2653 if (support != PACKET_ENABLE)
2656 if (value == NULL || *value == '\0')
2658 warning (_("Remote target reported \"%s\" without a size."),
2664 packet_size = strtol (value, &value_end, 16);
2665 if (errno != 0 || *value_end != '\0' || packet_size < 0)
2667 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
2668 feature->name, value);
2672 if (packet_size > MAX_REMOTE_PACKET_SIZE)
2674 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
2675 packet_size, MAX_REMOTE_PACKET_SIZE);
2676 packet_size = MAX_REMOTE_PACKET_SIZE;
2679 /* Record the new maximum packet size. */
2680 rs->explicit_packet_size = packet_size;
2684 remote_multi_process_feature (const struct protocol_feature *feature,
2685 enum packet_support support, const char *value)
2687 struct remote_state *rs = get_remote_state ();
2688 rs->multi_process_aware = (support == PACKET_ENABLE);
2691 static struct protocol_feature remote_protocol_features[] = {
2692 { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
2693 { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
2694 PACKET_qXfer_auxv },
2695 { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet,
2696 PACKET_qXfer_features },
2697 { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet,
2698 PACKET_qXfer_libraries },
2699 { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet,
2700 PACKET_qXfer_memory_map },
2701 { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet,
2702 PACKET_qXfer_spu_read },
2703 { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet,
2704 PACKET_qXfer_spu_write },
2705 { "QPassSignals", PACKET_DISABLE, remote_supported_packet,
2706 PACKET_QPassSignals },
2707 { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet,
2708 PACKET_QStartNoAckMode },
2709 { "multiprocess", PACKET_DISABLE, remote_multi_process_feature, -1 },
2713 remote_query_supported (void)
2715 struct remote_state *rs = get_remote_state ();
2718 unsigned char seen [ARRAY_SIZE (remote_protocol_features)];
2720 /* The packet support flags are handled differently for this packet
2721 than for most others. We treat an error, a disabled packet, and
2722 an empty response identically: any features which must be reported
2723 to be used will be automatically disabled. An empty buffer
2724 accomplishes this, since that is also the representation for a list
2725 containing no features. */
2728 if (remote_protocol_packets[PACKET_qSupported].support != PACKET_DISABLE)
2731 putpkt ("qSupported:multiprocess+");
2733 putpkt ("qSupported");
2735 getpkt (&rs->buf, &rs->buf_size, 0);
2737 /* If an error occured, warn, but do not return - just reset the
2738 buffer to empty and go on to disable features. */
2739 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported])
2742 warning (_("Remote failure reply: %s"), rs->buf);
2747 memset (seen, 0, sizeof (seen));
2752 enum packet_support is_supported;
2753 char *p, *end, *name_end, *value;
2755 /* First separate out this item from the rest of the packet. If
2756 there's another item after this, we overwrite the separator
2757 (terminated strings are much easier to work with). */
2759 end = strchr (p, ';');
2762 end = p + strlen (p);
2772 warning (_("empty item in \"qSupported\" response"));
2777 name_end = strchr (p, '=');
2780 /* This is a name=value entry. */
2781 is_supported = PACKET_ENABLE;
2782 value = name_end + 1;
2791 is_supported = PACKET_ENABLE;
2795 is_supported = PACKET_DISABLE;
2799 is_supported = PACKET_SUPPORT_UNKNOWN;
2803 warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p);
2809 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
2810 if (strcmp (remote_protocol_features[i].name, p) == 0)
2812 const struct protocol_feature *feature;
2815 feature = &remote_protocol_features[i];
2816 feature->func (feature, is_supported, value);
2821 /* If we increased the packet size, make sure to increase the global
2822 buffer size also. We delay this until after parsing the entire
2823 qSupported packet, because this is the same buffer we were
2825 if (rs->buf_size < rs->explicit_packet_size)
2827 rs->buf_size = rs->explicit_packet_size;
2828 rs->buf = xrealloc (rs->buf, rs->buf_size);
2831 /* Handle the defaults for unmentioned features. */
2832 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
2835 const struct protocol_feature *feature;
2837 feature = &remote_protocol_features[i];
2838 feature->func (feature, feature->default_support, NULL);
2844 remote_open_1 (char *name, int from_tty, struct target_ops *target, int extended_p)
2846 struct remote_state *rs = get_remote_state ();
2849 error (_("To open a remote debug connection, you need to specify what\n"
2850 "serial device is attached to the remote system\n"
2851 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
2853 /* See FIXME above. */
2854 if (!target_async_permitted)
2855 wait_forever_enabled_p = 1;
2857 /* If we're connected to a running target, target_preopen will kill it.
2858 But if we're connected to a target system with no running process,
2859 then we will still be connected when it returns. Ask this question
2860 first, before target_preopen has a chance to kill anything. */
2861 if (remote_desc != NULL && !target_has_execution)
2864 || query (_("Already connected to a remote target. Disconnect? ")))
2867 error (_("Still connected."));
2870 target_preopen (from_tty);
2872 unpush_target (target);
2874 /* This time without a query. If we were connected to an
2875 extended-remote target and target_preopen killed the running
2876 process, we may still be connected. If we are starting "target
2877 remote" now, the extended-remote target will not have been
2878 removed by unpush_target. */
2879 if (remote_desc != NULL && !target_has_execution)
2882 /* Make sure we send the passed signals list the next time we resume. */
2883 xfree (last_pass_packet);
2884 last_pass_packet = NULL;
2886 remote_fileio_reset ();
2887 reopen_exec_file ();
2890 remote_desc = remote_serial_open (name);
2892 perror_with_name (name);
2894 if (baud_rate != -1)
2896 if (serial_setbaudrate (remote_desc, baud_rate))
2898 /* The requested speed could not be set. Error out to
2899 top level after closing remote_desc. Take care to
2900 set remote_desc to NULL to avoid closing remote_desc
2902 serial_close (remote_desc);
2904 perror_with_name (name);
2908 serial_raw (remote_desc);
2910 /* If there is something sitting in the buffer we might take it as a
2911 response to a command, which would be bad. */
2912 serial_flush_input (remote_desc);
2916 puts_filtered ("Remote debugging using ");
2917 puts_filtered (name);
2918 puts_filtered ("\n");
2920 push_target (target); /* Switch to using remote target now. */
2922 /* Assume that the target is running, unless we learn otherwise. */
2923 target_mark_running (target);
2925 /* Reset the target state; these things will be queried either by
2926 remote_query_supported or as they are needed. */
2927 init_all_packet_configs ();
2928 rs->explicit_packet_size = 0;
2930 rs->multi_process_aware = 0;
2931 rs->extended = extended_p;
2932 rs->waiting_for_stop_reply = 0;
2934 general_thread = not_sent_ptid;
2935 continue_thread = not_sent_ptid;
2937 /* Probe for ability to use "ThreadInfo" query, as required. */
2938 use_threadinfo_query = 1;
2939 use_threadextra_query = 1;
2941 if (target_async_permitted)
2943 /* With this target we start out by owning the terminal. */
2944 remote_async_terminal_ours_p = 1;
2946 /* FIXME: cagney/1999-09-23: During the initial connection it is
2947 assumed that the target is already ready and able to respond to
2948 requests. Unfortunately remote_start_remote() eventually calls
2949 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2950 around this. Eventually a mechanism that allows
2951 wait_for_inferior() to expect/get timeouts will be
2953 wait_forever_enabled_p = 0;
2956 /* First delete any symbols previously loaded from shared libraries. */
2957 no_shared_libraries (NULL, 0);
2959 /* Start the remote connection. If error() or QUIT, discard this
2960 target (we'd otherwise be in an inconsistent state) and then
2961 propogate the error on up the exception chain. This ensures that
2962 the caller doesn't stumble along blindly assuming that the
2963 function succeeded. The CLI doesn't have this problem but other
2964 UI's, such as MI do.
2966 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
2967 this function should return an error indication letting the
2968 caller restore the previous state. Unfortunately the command
2969 ``target remote'' is directly wired to this function making that
2970 impossible. On a positive note, the CLI side of this problem has
2971 been fixed - the function set_cmd_context() makes it possible for
2972 all the ``target ....'' commands to share a common callback
2973 function. See cli-dump.c. */
2975 struct gdb_exception ex;
2976 struct start_remote_args args;
2978 args.from_tty = from_tty;
2979 args.target = target;
2980 args.extended_p = extended_p;
2982 ex = catch_exception (uiout, remote_start_remote, &args, RETURN_MASK_ALL);
2985 /* Pop the partially set up target - unless something else did
2986 already before throwing the exception. */
2987 if (remote_desc != NULL)
2989 if (target_async_permitted)
2990 wait_forever_enabled_p = 1;
2991 throw_exception (ex);
2995 if (target_async_permitted)
2996 wait_forever_enabled_p = 1;
2999 /* This takes a program previously attached to and detaches it. After
3000 this is done, GDB can be used to debug some other program. We
3001 better not have left any breakpoints in the target program or it'll
3002 die when it hits one. */
3005 remote_detach_1 (char *args, int from_tty, int extended)
3007 int pid = ptid_get_pid (inferior_ptid);
3008 struct remote_state *rs = get_remote_state ();
3011 error (_("Argument given to \"detach\" when remotely debugging."));
3013 if (!target_has_execution)
3014 error (_("No process to detach from."));
3016 /* Tell the remote target to detach. */
3017 if (remote_multi_process_p (rs))
3018 sprintf (rs->buf, "D;%x", pid);
3020 strcpy (rs->buf, "D");
3023 getpkt (&rs->buf, &rs->buf_size, 0);
3025 if (rs->buf[0] == 'O' && rs->buf[1] == 'K')
3027 else if (rs->buf[0] == '\0')
3028 error (_("Remote doesn't know how to detach"));
3030 error (_("Can't detach process."));
3032 /* Unregister the file descriptor from the event loop. */
3033 if (target_is_async_p ())
3034 serial_async (remote_desc, NULL, 0);
3038 if (remote_multi_process_p (rs))
3039 printf_filtered (_("Detached from remote %s.\n"),
3040 target_pid_to_str (pid_to_ptid (pid)));
3044 puts_filtered (_("Detached from remote process.\n"));
3046 puts_filtered (_("Ending remote debugging.\n"));
3050 detach_inferior (pid);
3051 target_mourn_inferior ();
3055 remote_detach (char *args, int from_tty)
3057 remote_detach_1 (args, from_tty, 0);
3061 extended_remote_detach (char *args, int from_tty)
3063 remote_detach_1 (args, from_tty, 1);
3066 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
3069 remote_disconnect (struct target_ops *target, char *args, int from_tty)
3072 error (_("Argument given to \"disconnect\" when remotely debugging."));
3074 /* Unregister the file descriptor from the event loop. */
3075 if (target_is_async_p ())
3076 serial_async (remote_desc, NULL, 0);
3078 /* Make sure we unpush even the extended remote targets; mourn
3079 won't do it. So call remote_mourn_1 directly instead of
3080 target_mourn_inferior. */
3081 remote_mourn_1 (target);
3084 puts_filtered ("Ending remote debugging.\n");
3087 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
3088 be chatty about it. */
3091 extended_remote_attach_1 (struct target_ops *target, char *args, int from_tty)
3093 struct remote_state *rs = get_remote_state ();
3096 char *wait_status = NULL;
3097 struct inferior *inf;
3100 error_no_arg (_("process-id to attach"));
3103 pid = strtol (args, &dummy, 0);
3104 /* Some targets don't set errno on errors, grrr! */
3105 if (pid == 0 && args == dummy)
3106 error (_("Illegal process-id: %s."), args);
3108 if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE)
3109 error (_("This target does not support attaching to a process"));
3111 sprintf (rs->buf, "vAttach;%x", pid);
3113 getpkt (&rs->buf, &rs->buf_size, 0);
3115 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vAttach]) == PACKET_OK)
3118 printf_unfiltered (_("Attached to %s\n"),
3119 target_pid_to_str (pid_to_ptid (pid)));
3121 /* Save the reply for later. */
3122 wait_status = alloca (strlen (rs->buf) + 1);
3123 strcpy (wait_status, rs->buf);
3125 else if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE)
3126 error (_("This target does not support attaching to a process"));
3128 error (_("Attaching to %s failed"),
3129 target_pid_to_str (pid_to_ptid (pid)));
3131 target_mark_running (target);
3132 inferior_ptid = pid_to_ptid (pid);
3134 /* Now, if we have thread information, update inferior_ptid. */
3135 inferior_ptid = remote_current_thread (inferior_ptid);
3137 inf = add_inferior (pid);
3138 inf->attach_flag = 1;
3140 /* Now, add the main thread to the thread list. */
3141 add_thread_silent (inferior_ptid);
3143 /* Next, if the target can specify a description, read it. We do
3144 this before anything involving memory or registers. */
3145 target_find_description ();
3147 /* Use the previously fetched status. */
3148 gdb_assert (wait_status != NULL);
3149 strcpy (rs->buf, wait_status);
3150 rs->cached_wait_status = 1;
3154 extended_remote_attach (char *args, int from_tty)
3156 extended_remote_attach_1 (&extended_remote_ops, args, from_tty);
3159 /* Convert hex digit A to a number. */
3164 if (a >= '0' && a <= '9')
3166 else if (a >= 'a' && a <= 'f')
3167 return a - 'a' + 10;
3168 else if (a >= 'A' && a <= 'F')
3169 return a - 'A' + 10;
3171 error (_("Reply contains invalid hex digit %d"), a);
3175 hex2bin (const char *hex, gdb_byte *bin, int count)
3179 for (i = 0; i < count; i++)
3181 if (hex[0] == 0 || hex[1] == 0)
3183 /* Hex string is short, or of uneven length.
3184 Return the count that has been converted so far. */
3187 *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]);
3193 /* Convert number NIB to a hex digit. */
3201 return 'a' + nib - 10;
3205 bin2hex (const gdb_byte *bin, char *hex, int count)
3208 /* May use a length, or a nul-terminated string as input. */
3210 count = strlen ((char *) bin);
3212 for (i = 0; i < count; i++)
3214 *hex++ = tohex ((*bin >> 4) & 0xf);
3215 *hex++ = tohex (*bin++ & 0xf);
3221 /* Check for the availability of vCont. This function should also check
3225 remote_vcont_probe (struct remote_state *rs)
3229 strcpy (rs->buf, "vCont?");
3231 getpkt (&rs->buf, &rs->buf_size, 0);
3234 /* Make sure that the features we assume are supported. */
3235 if (strncmp (buf, "vCont", 5) == 0)
3238 int support_s, support_S, support_c, support_C;
3244 while (p && *p == ';')
3247 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
3249 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
3251 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
3253 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
3256 p = strchr (p, ';');
3259 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
3260 BUF will make packet_ok disable the packet. */
3261 if (!support_s || !support_S || !support_c || !support_C)
3265 packet_ok (buf, &remote_protocol_packets[PACKET_vCont]);
3268 /* Resume the remote inferior by using a "vCont" packet. The thread
3269 to be resumed is PTID; STEP and SIGGNAL indicate whether the
3270 resumed thread should be single-stepped and/or signalled. If PTID
3271 equals minus_one_ptid, then all threads are resumed; the thread to
3272 be stepped and/or signalled is given in the global INFERIOR_PTID.
3273 This function returns non-zero iff it resumes the inferior.
3275 This function issues a strict subset of all possible vCont commands at the
3279 remote_vcont_resume (ptid_t ptid, int step, enum target_signal siggnal)
3281 struct remote_state *rs = get_remote_state ();
3285 if (remote_protocol_packets[PACKET_vCont].support == PACKET_SUPPORT_UNKNOWN)
3286 remote_vcont_probe (rs);
3288 if (remote_protocol_packets[PACKET_vCont].support == PACKET_DISABLE)
3292 endp = rs->buf + get_remote_packet_size ();
3294 /* If we could generate a wider range of packets, we'd have to worry
3295 about overflowing BUF. Should there be a generic
3296 "multi-part-packet" packet? */
3298 if (ptid_equal (ptid, magic_null_ptid))
3300 /* MAGIC_NULL_PTID means that we don't have any active threads,
3301 so we don't have any TID numbers the inferior will
3302 understand. Make sure to only send forms that do not specify
3304 if (step && siggnal != TARGET_SIGNAL_0)
3305 xsnprintf (p, endp - p, "vCont;S%02x", siggnal);
3307 xsnprintf (p, endp - p, "vCont;s");
3308 else if (siggnal != TARGET_SIGNAL_0)
3309 xsnprintf (p, endp - p, "vCont;C%02x", siggnal);
3311 xsnprintf (p, endp - p, "vCont;c");
3313 else if (ptid_equal (ptid, minus_one_ptid))
3315 /* Resume all threads, with preference for INFERIOR_PTID. */
3316 if (step && siggnal != TARGET_SIGNAL_0)
3318 /* Step inferior_ptid with signal. */
3319 p += xsnprintf (p, endp - p, "vCont;S%02x:", siggnal);
3320 p = write_ptid (p, endp, inferior_ptid);
3321 /* And continue others. */
3322 p += xsnprintf (p, endp - p, ";c");
3326 /* Step inferior_ptid. */
3327 p += xsnprintf (p, endp - p, "vCont;s:");
3328 p = write_ptid (p, endp, inferior_ptid);
3329 /* And continue others. */
3330 p += xsnprintf (p, endp - p, ";c");
3332 else if (siggnal != TARGET_SIGNAL_0)
3334 /* Continue inferior_ptid with signal. */
3335 p += xsnprintf (p, endp - p, "vCont;C%02x:", siggnal);
3336 p = write_ptid (p, endp, inferior_ptid);
3337 /* And continue others. */
3338 p += xsnprintf (p, endp - p, ";c");
3341 xsnprintf (p, endp - p, "vCont;c");
3345 /* Scheduler locking; resume only PTID. */
3346 if (step && siggnal != TARGET_SIGNAL_0)
3348 /* Step ptid with signal. */
3349 p += xsnprintf (p, endp - p, "vCont;S%02x:", siggnal);
3350 p = write_ptid (p, endp, ptid);
3355 p += xsnprintf (p, endp - p, "vCont;s:");
3356 p = write_ptid (p, endp, ptid);
3358 else if (siggnal != TARGET_SIGNAL_0)
3360 /* Continue ptid with signal. */
3361 p += xsnprintf (p, endp - p, "vCont;C%02x:", siggnal);
3362 p = write_ptid (p, endp, ptid);
3366 /* Continue ptid. */
3367 p += xsnprintf (p, endp - p, "vCont;c:");
3368 p = write_ptid (p, endp, ptid);
3372 gdb_assert (strlen (rs->buf) < get_remote_packet_size ());
3378 /* Tell the remote machine to resume. */
3380 static enum target_signal last_sent_signal = TARGET_SIGNAL_0;
3382 static int last_sent_step;
3385 remote_resume (ptid_t ptid, int step, enum target_signal siggnal)
3387 struct remote_state *rs = get_remote_state ();
3390 last_sent_signal = siggnal;
3391 last_sent_step = step;
3393 /* Update the inferior on signals to silently pass, if they've changed. */
3394 remote_pass_signals ();
3396 /* The vCont packet doesn't need to specify threads via Hc. */
3397 if (remote_vcont_resume (ptid, step, siggnal))
3400 /* All other supported resume packets do use Hc, so set the continue
3402 if (ptid_equal (ptid, minus_one_ptid))
3403 set_continue_thread (any_thread_ptid);
3405 set_continue_thread (ptid);
3408 if (siggnal != TARGET_SIGNAL_0)
3410 buf[0] = step ? 'S' : 'C';
3411 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
3412 buf[2] = tohex (((int) siggnal) & 0xf);
3416 strcpy (buf, step ? "s" : "c");
3421 /* We are about to start executing the inferior, let's register it
3422 with the event loop. NOTE: this is the one place where all the
3423 execution commands end up. We could alternatively do this in each
3424 of the execution commands in infcmd.c. */
3425 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
3426 into infcmd.c in order to allow inferior function calls to work
3427 NOT asynchronously. */
3428 if (target_can_async_p ())
3429 target_async (inferior_event_handler, 0);
3431 /* We've just told the target to resume. The remote server will
3432 wait for the inferior to stop, and then send a stop reply. In
3433 the mean time, we can't start another command/query ourselves
3434 because the stub wouldn't be ready to process it. */
3435 rs->waiting_for_stop_reply = 1;
3439 /* Set up the signal handler for SIGINT, while the target is
3440 executing, ovewriting the 'regular' SIGINT signal handler. */
3442 initialize_sigint_signal_handler (void)
3444 signal (SIGINT, handle_remote_sigint);
3447 /* Signal handler for SIGINT, while the target is executing. */
3449 handle_remote_sigint (int sig)
3451 signal (sig, handle_remote_sigint_twice);
3452 mark_async_signal_handler_wrapper (sigint_remote_token);
3455 /* Signal handler for SIGINT, installed after SIGINT has already been
3456 sent once. It will take effect the second time that the user sends
3459 handle_remote_sigint_twice (int sig)
3461 signal (sig, handle_remote_sigint);
3462 mark_async_signal_handler_wrapper (sigint_remote_twice_token);
3465 /* Perform the real interruption of the target execution, in response
3468 async_remote_interrupt (gdb_client_data arg)
3471 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
3473 target_stop (inferior_ptid);
3476 /* Perform interrupt, if the first attempt did not succeed. Just give
3477 up on the target alltogether. */
3479 async_remote_interrupt_twice (gdb_client_data arg)
3482 fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n");
3487 /* Reinstall the usual SIGINT handlers, after the target has
3490 cleanup_sigint_signal_handler (void *dummy)
3492 signal (SIGINT, handle_sigint);
3495 /* Send ^C to target to halt it. Target will respond, and send us a
3497 static void (*ofunc) (int);
3499 /* The command line interface's stop routine. This function is installed
3500 as a signal handler for SIGINT. The first time a user requests a
3501 stop, we call remote_stop to send a break or ^C. If there is no
3502 response from the target (it didn't stop when the user requested it),
3503 we ask the user if he'd like to detach from the target. */
3505 remote_interrupt (int signo)
3507 /* If this doesn't work, try more severe steps. */
3508 signal (signo, remote_interrupt_twice);
3510 gdb_call_async_signal_handler (sigint_remote_token, 1);
3513 /* The user typed ^C twice. */
3516 remote_interrupt_twice (int signo)
3518 signal (signo, ofunc);
3519 gdb_call_async_signal_handler (sigint_remote_twice_token, 1);
3520 signal (signo, remote_interrupt);
3523 /* This is the generic stop called via the target vector. When a target
3524 interrupt is requested, either by the command line or the GUI, we
3525 will eventually end up here. */
3527 remote_stop (ptid_t ptid)
3529 /* Send a break or a ^C, depending on user preference. */
3531 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
3534 serial_send_break (remote_desc);
3536 serial_write (remote_desc, "\003", 1);
3539 /* Ask the user what to do when an interrupt is received. */
3542 interrupt_query (void)
3544 target_terminal_ours ();
3546 if (query ("Interrupted while waiting for the program.\n\
3547 Give up (and stop debugging it)? "))
3549 target_mourn_inferior ();
3550 signal (SIGINT, handle_sigint);
3551 deprecated_throw_reason (RETURN_QUIT);
3554 target_terminal_inferior ();
3557 /* Enable/disable target terminal ownership. Most targets can use
3558 terminal groups to control terminal ownership. Remote targets are
3559 different in that explicit transfer of ownership to/from GDB/target
3563 remote_terminal_inferior (void)
3565 if (!target_async_permitted)
3566 /* Nothing to do. */
3569 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
3570 sync_execution here. This function should only be called when
3571 GDB is resuming the inferior in the forground. A background
3572 resume (``run&'') should leave GDB in control of the terminal and
3573 consequently should not call this code. */
3574 if (!sync_execution)
3576 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
3577 calls target_terminal_*() idenpotent. The event-loop GDB talking
3578 to an asynchronous target with a synchronous command calls this
3579 function from both event-top.c and infrun.c/infcmd.c. Once GDB
3580 stops trying to transfer the terminal to the target when it
3581 shouldn't this guard can go away. */
3582 if (!remote_async_terminal_ours_p)
3584 delete_file_handler (input_fd);
3585 remote_async_terminal_ours_p = 0;
3586 initialize_sigint_signal_handler ();
3587 /* NOTE: At this point we could also register our selves as the
3588 recipient of all input. Any characters typed could then be
3589 passed on down to the target. */
3593 remote_terminal_ours (void)
3595 if (!target_async_permitted)
3596 /* Nothing to do. */
3599 /* See FIXME in remote_terminal_inferior. */
3600 if (!sync_execution)
3602 /* See FIXME in remote_terminal_inferior. */
3603 if (remote_async_terminal_ours_p)
3605 cleanup_sigint_signal_handler (NULL);
3606 add_file_handler (input_fd, stdin_event_handler, 0);
3607 remote_async_terminal_ours_p = 1;
3611 remote_console_output (char *msg)
3615 for (p = msg; p[0] && p[1]; p += 2)
3618 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
3621 fputs_unfiltered (tb, gdb_stdtarg);
3623 gdb_flush (gdb_stdtarg);
3626 /* Wait until the remote machine stops, then return,
3627 storing status in STATUS just as `wait' would. */
3630 remote_wait (ptid_t ptid, struct target_waitstatus *status)
3632 struct remote_state *rs = get_remote_state ();
3633 struct remote_arch_state *rsa = get_remote_arch_state ();
3634 ptid_t event_ptid = null_ptid;
3636 int solibs_changed = 0;
3638 status->kind = TARGET_WAITKIND_EXITED;
3639 status->value.integer = 0;
3645 if (rs->cached_wait_status)
3646 /* Use the cached wait status, but only once. */
3647 rs->cached_wait_status = 0;
3650 if (!target_is_async_p ())
3652 ofunc = signal (SIGINT, remote_interrupt);
3653 /* If the user hit C-c before this packet, or between packets,
3654 pretend that it was hit right here. */
3658 remote_interrupt (SIGINT);
3661 /* FIXME: cagney/1999-09-27: If we're in async mode we should
3662 _never_ wait for ever -> test on target_is_async_p().
3663 However, before we do that we need to ensure that the caller
3664 knows how to take the target into/out of async mode. */
3665 getpkt (&rs->buf, &rs->buf_size, wait_forever_enabled_p);
3666 if (!target_is_async_p ())
3667 signal (SIGINT, ofunc);
3672 remote_stopped_by_watchpoint_p = 0;
3674 /* We got something. */
3675 rs->waiting_for_stop_reply = 0;
3679 case 'E': /* Error of some sort. */
3680 /* We're out of sync with the target now. Did it continue or not?
3681 Not is more likely, so report a stop. */
3682 warning (_("Remote failure reply: %s"), buf);
3683 status->kind = TARGET_WAITKIND_STOPPED;
3684 status->value.sig = TARGET_SIGNAL_0;
3686 case 'F': /* File-I/O request. */
3687 remote_fileio_request (buf);
3689 /* This stop reply is special. We reply back to the stub,
3690 and keep waiting for the target to stop. */
3691 rs->waiting_for_stop_reply = 1;
3693 case 'T': /* Status with PC, SP, FP, ... */
3695 gdb_byte regs[MAX_REGISTER_SIZE];
3697 /* Expedited reply, containing Signal, {regno, reg} repeat. */
3698 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3700 n... = register number
3701 r... = register contents
3703 p = &buf[3]; /* after Txx */
3712 /* If the packet contains a register number, save it
3713 in pnum and set p1 to point to the character
3714 following it. Otherwise p1 points to p. */
3716 /* If this packet is an awatch packet, don't parse the
3717 'a' as a register number. */
3719 if (strncmp (p, "awatch", strlen("awatch")) != 0)
3721 /* Read the ``P'' register number. */
3722 pnum = strtol (p, &p_temp, 16);
3728 if (p1 == p) /* No register number present here. */
3730 p1 = strchr (p, ':');
3732 error (_("Malformed packet(a) (missing colon): %s\n\
3735 if (strncmp (p, "thread", p1 - p) == 0)
3736 event_ptid = read_ptid (++p1, &p);
3737 else if ((strncmp (p, "watch", p1 - p) == 0)
3738 || (strncmp (p, "rwatch", p1 - p) == 0)
3739 || (strncmp (p, "awatch", p1 - p) == 0))
3741 remote_stopped_by_watchpoint_p = 1;
3742 p = unpack_varlen_hex (++p1, &addr);
3743 remote_watch_data_address = (CORE_ADDR)addr;
3745 else if (strncmp (p, "library", p1 - p) == 0)
3749 while (*p_temp && *p_temp != ';')
3757 /* Silently skip unknown optional info. */
3758 p_temp = strchr (p1 + 1, ';');
3765 struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum);
3769 error (_("Malformed packet(b) (missing colon): %s\n\
3775 error (_("Remote sent bad register number %s: %s\n\
3777 phex_nz (pnum, 0), p, buf);
3779 fieldsize = hex2bin (p, regs,
3780 register_size (target_gdbarch,
3783 if (fieldsize < register_size (target_gdbarch,
3785 warning (_("Remote reply is too short: %s"), buf);
3786 regcache_raw_supply (get_current_regcache (),
3791 error (_("Remote register badly formatted: %s\nhere: %s"),
3797 case 'S': /* Old style status, just signal only. */
3799 status->kind = TARGET_WAITKIND_LOADED;
3802 status->kind = TARGET_WAITKIND_STOPPED;
3803 status->value.sig = (enum target_signal)
3804 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3807 case 'W': /* Target exited. */
3814 /* GDB used to accept only 2 hex chars here. Stubs should
3815 only send more if they detect GDB supports
3816 multi-process support. */
3817 p = unpack_varlen_hex (&buf[1], &value);
3821 /* The remote process exited. */
3822 status->kind = TARGET_WAITKIND_EXITED;
3823 status->value.integer = value;
3827 /* The remote process exited with a signal. */
3828 status->kind = TARGET_WAITKIND_SIGNALLED;
3829 status->value.sig = (enum target_signal) value;
3832 /* If no process is specified, assume inferior_ptid. */
3833 pid = ptid_get_pid (inferior_ptid);
3842 else if (strncmp (p,
3843 "process:", sizeof ("process:") - 1) == 0)
3846 p += sizeof ("process:") - 1;
3847 unpack_varlen_hex (p, &upid);
3851 error (_("unknown stop reply packet: %s"), buf);
3854 error (_("unknown stop reply packet: %s"), buf);
3855 event_ptid = ptid_build (pid, 0, 0);
3858 case 'O': /* Console output. */
3859 remote_console_output (buf + 1);
3861 /* The target didn't really stop; keep waiting. */
3862 rs->waiting_for_stop_reply = 1;
3864 if (target_can_async_p ())
3866 /* Return immediately to the event loop. The event loop
3867 will still be waiting on the inferior afterwards. */
3868 status->kind = TARGET_WAITKIND_IGNORE;
3874 if (last_sent_signal != TARGET_SIGNAL_0)
3876 /* Zero length reply means that we tried 'S' or 'C' and
3877 the remote system doesn't support it. */
3878 target_terminal_ours_for_output ();
3880 ("Can't send signals to this remote system. %s not sent.\n",
3881 target_signal_to_name (last_sent_signal));
3882 last_sent_signal = TARGET_SIGNAL_0;
3883 target_terminal_inferior ();
3885 strcpy ((char *) buf, last_sent_step ? "s" : "c");
3886 putpkt ((char *) buf);
3888 /* We just told the target to resume, so a stop reply is
3890 rs->waiting_for_stop_reply = 1;
3893 /* else fallthrough */
3895 warning (_("Invalid remote reply: %s"), buf);
3897 rs->waiting_for_stop_reply = 1;
3902 if (status->kind == TARGET_WAITKIND_EXITED
3903 || status->kind == TARGET_WAITKIND_SIGNALLED)
3905 int pid = ptid_get_pid (event_ptid);
3906 delete_inferior (pid);
3910 if (!ptid_equal (event_ptid, null_ptid))
3911 record_currthread (event_ptid);
3913 event_ptid = inferior_ptid;
3919 /* Fetch a single register using a 'p' packet. */
3922 fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg)
3924 struct remote_state *rs = get_remote_state ();
3926 char regp[MAX_REGISTER_SIZE];
3929 if (remote_protocol_packets[PACKET_p].support == PACKET_DISABLE)
3932 if (reg->pnum == -1)
3937 p += hexnumstr (p, reg->pnum);
3939 remote_send (&rs->buf, &rs->buf_size);
3943 switch (packet_ok (buf, &remote_protocol_packets[PACKET_p]))
3947 case PACKET_UNKNOWN:
3950 error (_("Could not fetch register \"%s\""),
3951 gdbarch_register_name (get_regcache_arch (regcache), reg->regnum));
3954 /* If this register is unfetchable, tell the regcache. */
3957 regcache_raw_supply (regcache, reg->regnum, NULL);
3961 /* Otherwise, parse and supply the value. */
3967 error (_("fetch_register_using_p: early buf termination"));
3969 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
3972 regcache_raw_supply (regcache, reg->regnum, regp);
3976 /* Fetch the registers included in the target's 'g' packet. */
3979 send_g_packet (void)
3981 struct remote_state *rs = get_remote_state ();
3986 sprintf (rs->buf, "g");
3987 remote_send (&rs->buf, &rs->buf_size);
3989 /* We can get out of synch in various cases. If the first character
3990 in the buffer is not a hex character, assume that has happened
3991 and try to fetch another packet to read. */
3992 while ((rs->buf[0] < '0' || rs->buf[0] > '9')
3993 && (rs->buf[0] < 'A' || rs->buf[0] > 'F')
3994 && (rs->buf[0] < 'a' || rs->buf[0] > 'f')
3995 && rs->buf[0] != 'x') /* New: unavailable register value. */
3998 fprintf_unfiltered (gdb_stdlog,
3999 "Bad register packet; fetching a new packet\n");
4000 getpkt (&rs->buf, &rs->buf_size, 0);
4003 buf_len = strlen (rs->buf);
4005 /* Sanity check the received packet. */
4006 if (buf_len % 2 != 0)
4007 error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf);
4013 process_g_packet (struct regcache *regcache)
4015 struct gdbarch *gdbarch = get_regcache_arch (regcache);
4016 struct remote_state *rs = get_remote_state ();
4017 struct remote_arch_state *rsa = get_remote_arch_state ();
4022 buf_len = strlen (rs->buf);
4024 /* Further sanity checks, with knowledge of the architecture. */
4025 if (buf_len > 2 * rsa->sizeof_g_packet)
4026 error (_("Remote 'g' packet reply is too long: %s"), rs->buf);
4028 /* Save the size of the packet sent to us by the target. It is used
4029 as a heuristic when determining the max size of packets that the
4030 target can safely receive. */
4031 if (rsa->actual_register_packet_size == 0)
4032 rsa->actual_register_packet_size = buf_len;
4034 /* If this is smaller than we guessed the 'g' packet would be,
4035 update our records. A 'g' reply that doesn't include a register's
4036 value implies either that the register is not available, or that
4037 the 'p' packet must be used. */
4038 if (buf_len < 2 * rsa->sizeof_g_packet)
4040 rsa->sizeof_g_packet = buf_len / 2;
4042 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
4044 if (rsa->regs[i].pnum == -1)
4047 if (rsa->regs[i].offset >= rsa->sizeof_g_packet)
4048 rsa->regs[i].in_g_packet = 0;
4050 rsa->regs[i].in_g_packet = 1;
4054 regs = alloca (rsa->sizeof_g_packet);
4056 /* Unimplemented registers read as all bits zero. */
4057 memset (regs, 0, rsa->sizeof_g_packet);
4059 /* Reply describes registers byte by byte, each byte encoded as two
4060 hex characters. Suck them all up, then supply them to the
4061 register cacheing/storage mechanism. */
4064 for (i = 0; i < rsa->sizeof_g_packet; i++)
4066 if (p[0] == 0 || p[1] == 0)
4067 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
4068 internal_error (__FILE__, __LINE__,
4069 "unexpected end of 'g' packet reply");
4071 if (p[0] == 'x' && p[1] == 'x')
4072 regs[i] = 0; /* 'x' */
4074 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
4080 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
4082 struct packet_reg *r = &rsa->regs[i];
4085 if (r->offset * 2 >= strlen (rs->buf))
4086 /* This shouldn't happen - we adjusted in_g_packet above. */
4087 internal_error (__FILE__, __LINE__,
4088 "unexpected end of 'g' packet reply");
4089 else if (rs->buf[r->offset * 2] == 'x')
4091 gdb_assert (r->offset * 2 < strlen (rs->buf));
4092 /* The register isn't available, mark it as such (at
4093 the same time setting the value to zero). */
4094 regcache_raw_supply (regcache, r->regnum, NULL);
4097 regcache_raw_supply (regcache, r->regnum,
4105 fetch_registers_using_g (struct regcache *regcache)
4108 process_g_packet (regcache);
4112 remote_fetch_registers (struct regcache *regcache, int regnum)
4114 struct remote_state *rs = get_remote_state ();
4115 struct remote_arch_state *rsa = get_remote_arch_state ();
4118 set_general_thread (inferior_ptid);
4122 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
4123 gdb_assert (reg != NULL);
4125 /* If this register might be in the 'g' packet, try that first -
4126 we are likely to read more than one register. If this is the
4127 first 'g' packet, we might be overly optimistic about its
4128 contents, so fall back to 'p'. */
4129 if (reg->in_g_packet)
4131 fetch_registers_using_g (regcache);
4132 if (reg->in_g_packet)
4136 if (fetch_register_using_p (regcache, reg))
4139 /* This register is not available. */
4140 regcache_raw_supply (regcache, reg->regnum, NULL);
4145 fetch_registers_using_g (regcache);
4147 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
4148 if (!rsa->regs[i].in_g_packet)
4149 if (!fetch_register_using_p (regcache, &rsa->regs[i]))
4151 /* This register is not available. */
4152 regcache_raw_supply (regcache, i, NULL);
4156 /* Prepare to store registers. Since we may send them all (using a
4157 'G' request), we have to read out the ones we don't want to change
4161 remote_prepare_to_store (struct regcache *regcache)
4163 struct remote_arch_state *rsa = get_remote_arch_state ();
4165 gdb_byte buf[MAX_REGISTER_SIZE];
4167 /* Make sure the entire registers array is valid. */
4168 switch (remote_protocol_packets[PACKET_P].support)
4170 case PACKET_DISABLE:
4171 case PACKET_SUPPORT_UNKNOWN:
4172 /* Make sure all the necessary registers are cached. */
4173 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
4174 if (rsa->regs[i].in_g_packet)
4175 regcache_raw_read (regcache, rsa->regs[i].regnum, buf);
4182 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
4183 packet was not recognized. */
4186 store_register_using_P (const struct regcache *regcache, struct packet_reg *reg)
4188 struct gdbarch *gdbarch = get_regcache_arch (regcache);
4189 struct remote_state *rs = get_remote_state ();
4190 struct remote_arch_state *rsa = get_remote_arch_state ();
4191 /* Try storing a single register. */
4192 char *buf = rs->buf;
4193 gdb_byte regp[MAX_REGISTER_SIZE];
4196 if (remote_protocol_packets[PACKET_P].support == PACKET_DISABLE)
4199 if (reg->pnum == -1)
4202 xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0));
4203 p = buf + strlen (buf);
4204 regcache_raw_collect (regcache, reg->regnum, regp);
4205 bin2hex (regp, p, register_size (gdbarch, reg->regnum));
4206 remote_send (&rs->buf, &rs->buf_size);
4208 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P]))
4213 error (_("Could not write register \"%s\""),
4214 gdbarch_register_name (gdbarch, reg->regnum));
4215 case PACKET_UNKNOWN:
4218 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
4222 /* Store register REGNUM, or all registers if REGNUM == -1, from the
4223 contents of the register cache buffer. FIXME: ignores errors. */
4226 store_registers_using_G (const struct regcache *regcache)
4228 struct remote_state *rs = get_remote_state ();
4229 struct remote_arch_state *rsa = get_remote_arch_state ();
4233 /* Extract all the registers in the regcache copying them into a
4237 regs = alloca (rsa->sizeof_g_packet);
4238 memset (regs, 0, rsa->sizeof_g_packet);
4239 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
4241 struct packet_reg *r = &rsa->regs[i];
4243 regcache_raw_collect (regcache, r->regnum, regs + r->offset);
4247 /* Command describes registers byte by byte,
4248 each byte encoded as two hex characters. */
4251 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
4253 bin2hex (regs, p, rsa->sizeof_g_packet);
4254 remote_send (&rs->buf, &rs->buf_size);
4257 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
4258 of the register cache buffer. FIXME: ignores errors. */
4261 remote_store_registers (struct regcache *regcache, int regnum)
4263 struct remote_state *rs = get_remote_state ();
4264 struct remote_arch_state *rsa = get_remote_arch_state ();
4267 set_general_thread (inferior_ptid);
4271 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
4272 gdb_assert (reg != NULL);
4274 /* Always prefer to store registers using the 'P' packet if
4275 possible; we often change only a small number of registers.
4276 Sometimes we change a larger number; we'd need help from a
4277 higher layer to know to use 'G'. */
4278 if (store_register_using_P (regcache, reg))
4281 /* For now, don't complain if we have no way to write the
4282 register. GDB loses track of unavailable registers too
4283 easily. Some day, this may be an error. We don't have
4284 any way to read the register, either... */
4285 if (!reg->in_g_packet)
4288 store_registers_using_G (regcache);
4292 store_registers_using_G (regcache);
4294 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
4295 if (!rsa->regs[i].in_g_packet)
4296 if (!store_register_using_P (regcache, &rsa->regs[i]))
4297 /* See above for why we do not issue an error here. */
4302 /* Return the number of hex digits in num. */
4305 hexnumlen (ULONGEST num)
4309 for (i = 0; num != 0; i++)
4315 /* Set BUF to the minimum number of hex digits representing NUM. */
4318 hexnumstr (char *buf, ULONGEST num)
4320 int len = hexnumlen (num);
4321 return hexnumnstr (buf, num, len);
4325 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
4328 hexnumnstr (char *buf, ULONGEST num, int width)
4334 for (i = width - 1; i >= 0; i--)
4336 buf[i] = "0123456789abcdef"[(num & 0xf)];
4343 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
4346 remote_address_masked (CORE_ADDR addr)
4348 int address_size = remote_address_size;
4349 /* If "remoteaddresssize" was not set, default to target address size. */
4351 address_size = gdbarch_addr_bit (target_gdbarch);
4353 if (address_size > 0
4354 && address_size < (sizeof (ULONGEST) * 8))
4356 /* Only create a mask when that mask can safely be constructed
4357 in a ULONGEST variable. */
4359 mask = (mask << address_size) - 1;
4365 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
4366 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
4367 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
4368 (which may be more than *OUT_LEN due to escape characters). The
4369 total number of bytes in the output buffer will be at most
4373 remote_escape_output (const gdb_byte *buffer, int len,
4374 gdb_byte *out_buf, int *out_len,
4377 int input_index, output_index;
4380 for (input_index = 0; input_index < len; input_index++)
4382 gdb_byte b = buffer[input_index];
4384 if (b == '$' || b == '#' || b == '}')
4386 /* These must be escaped. */
4387 if (output_index + 2 > out_maxlen)
4389 out_buf[output_index++] = '}';
4390 out_buf[output_index++] = b ^ 0x20;
4394 if (output_index + 1 > out_maxlen)
4396 out_buf[output_index++] = b;
4400 *out_len = input_index;
4401 return output_index;
4404 /* Convert BUFFER, escaped data LEN bytes long, into binary data
4405 in OUT_BUF. Return the number of bytes written to OUT_BUF.
4406 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
4408 This function reverses remote_escape_output. It allows more
4409 escaped characters than that function does, in particular because
4410 '*' must be escaped to avoid the run-length encoding processing
4411 in reading packets. */
4414 remote_unescape_input (const gdb_byte *buffer, int len,
4415 gdb_byte *out_buf, int out_maxlen)
4417 int input_index, output_index;
4422 for (input_index = 0; input_index < len; input_index++)
4424 gdb_byte b = buffer[input_index];
4426 if (output_index + 1 > out_maxlen)
4428 warning (_("Received too much data from remote target;"
4429 " ignoring overflow."));
4430 return output_index;
4435 out_buf[output_index++] = b ^ 0x20;
4441 out_buf[output_index++] = b;
4445 error (_("Unmatched escape character in target response."));
4447 return output_index;
4450 /* Determine whether the remote target supports binary downloading.
4451 This is accomplished by sending a no-op memory write of zero length
4452 to the target at the specified address. It does not suffice to send
4453 the whole packet, since many stubs strip the eighth bit and
4454 subsequently compute a wrong checksum, which causes real havoc with
4457 NOTE: This can still lose if the serial line is not eight-bit
4458 clean. In cases like this, the user should clear "remote
4462 check_binary_download (CORE_ADDR addr)
4464 struct remote_state *rs = get_remote_state ();
4466 switch (remote_protocol_packets[PACKET_X].support)
4468 case PACKET_DISABLE:
4472 case PACKET_SUPPORT_UNKNOWN:
4478 p += hexnumstr (p, (ULONGEST) addr);
4480 p += hexnumstr (p, (ULONGEST) 0);
4484 putpkt_binary (rs->buf, (int) (p - rs->buf));
4485 getpkt (&rs->buf, &rs->buf_size, 0);
4487 if (rs->buf[0] == '\0')
4490 fprintf_unfiltered (gdb_stdlog,
4491 "binary downloading NOT suppported by target\n");
4492 remote_protocol_packets[PACKET_X].support = PACKET_DISABLE;
4497 fprintf_unfiltered (gdb_stdlog,
4498 "binary downloading suppported by target\n");
4499 remote_protocol_packets[PACKET_X].support = PACKET_ENABLE;
4506 /* Write memory data directly to the remote machine.
4507 This does not inform the data cache; the data cache uses this.
4508 HEADER is the starting part of the packet.
4509 MEMADDR is the address in the remote memory space.
4510 MYADDR is the address of the buffer in our space.
4511 LEN is the number of bytes.
4512 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
4513 should send data as binary ('X'), or hex-encoded ('M').
4515 The function creates packet of the form
4516 <HEADER><ADDRESS>,<LENGTH>:<DATA>
4518 where encoding of <DATA> is termined by PACKET_FORMAT.
4520 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
4523 Returns the number of bytes transferred, or 0 (setting errno) for
4524 error. Only transfer a single packet. */
4527 remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
4528 const gdb_byte *myaddr, int len,
4529 char packet_format, int use_length)
4531 struct remote_state *rs = get_remote_state ();
4541 if (packet_format != 'X' && packet_format != 'M')
4542 internal_error (__FILE__, __LINE__,
4543 "remote_write_bytes_aux: bad packet format");
4548 payload_size = get_memory_write_packet_size ();
4550 /* The packet buffer will be large enough for the payload;
4551 get_memory_packet_size ensures this. */
4554 /* Compute the size of the actual payload by subtracting out the
4555 packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
4557 payload_size -= strlen ("$,:#NN");
4559 /* The comma won't be used. */
4561 header_length = strlen (header);
4562 payload_size -= header_length;
4563 payload_size -= hexnumlen (memaddr);
4565 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
4567 strcat (rs->buf, header);
4568 p = rs->buf + strlen (header);
4570 /* Compute a best guess of the number of bytes actually transfered. */
4571 if (packet_format == 'X')
4573 /* Best guess at number of bytes that will fit. */
4574 todo = min (len, payload_size);
4576 payload_size -= hexnumlen (todo);
4577 todo = min (todo, payload_size);
4581 /* Num bytes that will fit. */
4582 todo = min (len, payload_size / 2);
4584 payload_size -= hexnumlen (todo);
4585 todo = min (todo, payload_size / 2);
4589 internal_error (__FILE__, __LINE__,
4590 _("minumum packet size too small to write data"));
4592 /* If we already need another packet, then try to align the end
4593 of this packet to a useful boundary. */
4594 if (todo > 2 * REMOTE_ALIGN_WRITES && todo < len)
4595 todo = ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr;
4597 /* Append "<memaddr>". */
4598 memaddr = remote_address_masked (memaddr);
4599 p += hexnumstr (p, (ULONGEST) memaddr);
4606 /* Append <len>. Retain the location/size of <len>. It may need to
4607 be adjusted once the packet body has been created. */
4609 plenlen = hexnumstr (p, (ULONGEST) todo);
4617 /* Append the packet body. */
4618 if (packet_format == 'X')
4620 /* Binary mode. Send target system values byte by byte, in
4621 increasing byte addresses. Only escape certain critical
4623 payload_length = remote_escape_output (myaddr, todo, p, &nr_bytes,
4626 /* If not all TODO bytes fit, then we'll need another packet. Make
4627 a second try to keep the end of the packet aligned. Don't do
4628 this if the packet is tiny. */
4629 if (nr_bytes < todo && nr_bytes > 2 * REMOTE_ALIGN_WRITES)
4633 new_nr_bytes = (((memaddr + nr_bytes) & ~(REMOTE_ALIGN_WRITES - 1))
4635 if (new_nr_bytes != nr_bytes)
4636 payload_length = remote_escape_output (myaddr, new_nr_bytes,
4641 p += payload_length;
4642 if (use_length && nr_bytes < todo)
4644 /* Escape chars have filled up the buffer prematurely,
4645 and we have actually sent fewer bytes than planned.
4646 Fix-up the length field of the packet. Use the same
4647 number of characters as before. */
4648 plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen);
4649 *plen = ':'; /* overwrite \0 from hexnumnstr() */
4654 /* Normal mode: Send target system values byte by byte, in
4655 increasing byte addresses. Each byte is encoded as a two hex
4657 nr_bytes = bin2hex (myaddr, p, todo);
4661 putpkt_binary (rs->buf, (int) (p - rs->buf));
4662 getpkt (&rs->buf, &rs->buf_size, 0);
4664 if (rs->buf[0] == 'E')
4666 /* There is no correspondance between what the remote protocol
4667 uses for errors and errno codes. We would like a cleaner way
4668 of representing errors (big enough to include errno codes,
4669 bfd_error codes, and others). But for now just return EIO. */
4674 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
4675 fewer bytes than we'd planned. */
4679 /* Write memory data directly to the remote machine.
4680 This does not inform the data cache; the data cache uses this.
4681 MEMADDR is the address in the remote memory space.
4682 MYADDR is the address of the buffer in our space.
4683 LEN is the number of bytes.
4685 Returns number of bytes transferred, or 0 (setting errno) for
4686 error. Only transfer a single packet. */
4689 remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
4691 char *packet_format = 0;
4693 /* Check whether the target supports binary download. */
4694 check_binary_download (memaddr);
4696 switch (remote_protocol_packets[PACKET_X].support)
4699 packet_format = "X";
4701 case PACKET_DISABLE:
4702 packet_format = "M";
4704 case PACKET_SUPPORT_UNKNOWN:
4705 internal_error (__FILE__, __LINE__,
4706 _("remote_write_bytes: bad internal state"));
4708 internal_error (__FILE__, __LINE__, _("bad switch"));
4711 return remote_write_bytes_aux (packet_format,
4712 memaddr, myaddr, len, packet_format[0], 1);
4715 /* Read memory data directly from the remote machine.
4716 This does not use the data cache; the data cache uses this.
4717 MEMADDR is the address in the remote memory space.
4718 MYADDR is the address of the buffer in our space.
4719 LEN is the number of bytes.
4721 Returns number of bytes transferred, or 0 for error. */
4723 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
4724 remote targets) shouldn't attempt to read the entire buffer.
4725 Instead it should read a single packet worth of data and then
4726 return the byte size of that packet to the caller. The caller (its
4727 caller and its callers caller ;-) already contains code for
4728 handling partial reads. */
4731 remote_read_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
4733 struct remote_state *rs = get_remote_state ();
4734 int max_buf_size; /* Max size of packet output buffer. */
4740 max_buf_size = get_memory_read_packet_size ();
4741 /* The packet buffer will be large enough for the payload;
4742 get_memory_packet_size ensures this. */
4751 todo = min (len, max_buf_size / 2); /* num bytes that will fit */
4753 /* construct "m"<memaddr>","<len>" */
4754 /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */
4755 memaddr = remote_address_masked (memaddr);
4758 p += hexnumstr (p, (ULONGEST) memaddr);
4760 p += hexnumstr (p, (ULONGEST) todo);
4764 getpkt (&rs->buf, &rs->buf_size, 0);
4766 if (rs->buf[0] == 'E'
4767 && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2])
4768 && rs->buf[3] == '\0')
4770 /* There is no correspondance between what the remote
4771 protocol uses for errors and errno codes. We would like
4772 a cleaner way of representing errors (big enough to
4773 include errno codes, bfd_error codes, and others). But
4774 for now just return EIO. */
4779 /* Reply describes memory byte by byte,
4780 each byte encoded as two hex characters. */
4783 if ((i = hex2bin (p, myaddr, todo)) < todo)
4785 /* Reply is short. This means that we were able to read
4786 only part of what we wanted to. */
4787 return i + (origlen - len);
4796 /* Read or write LEN bytes from inferior memory at MEMADDR,
4797 transferring to or from debugger address BUFFER. Write to inferior
4798 if SHOULD_WRITE is nonzero. Returns length of data written or
4799 read; 0 for error. TARGET is unused. */
4802 remote_xfer_memory (CORE_ADDR mem_addr, gdb_byte *buffer, int mem_len,
4803 int should_write, struct mem_attrib *attrib,
4804 struct target_ops *target)
4808 set_general_thread (inferior_ptid);
4811 res = remote_write_bytes (mem_addr, buffer, mem_len);
4813 res = remote_read_bytes (mem_addr, buffer, mem_len);
4818 /* Sends a packet with content determined by the printf format string
4819 FORMAT and the remaining arguments, then gets the reply. Returns
4820 whether the packet was a success, a failure, or unknown. */
4823 remote_send_printf (const char *format, ...)
4825 struct remote_state *rs = get_remote_state ();
4826 int max_size = get_remote_packet_size ();
4829 va_start (ap, format);
4832 if (vsnprintf (rs->buf, max_size, format, ap) >= max_size)
4833 internal_error (__FILE__, __LINE__, "Too long remote packet.");
4835 if (putpkt (rs->buf) < 0)
4836 error (_("Communication problem with target."));
4839 getpkt (&rs->buf, &rs->buf_size, 0);
4841 return packet_check_result (rs->buf);
4845 restore_remote_timeout (void *p)
4847 int value = *(int *)p;
4848 remote_timeout = value;
4851 /* Flash writing can take quite some time. We'll set
4852 effectively infinite timeout for flash operations.
4853 In future, we'll need to decide on a better approach. */
4854 static const int remote_flash_timeout = 1000;
4857 remote_flash_erase (struct target_ops *ops,
4858 ULONGEST address, LONGEST length)
4860 int saved_remote_timeout = remote_timeout;
4861 enum packet_result ret;
4863 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
4864 &saved_remote_timeout);
4865 remote_timeout = remote_flash_timeout;
4867 ret = remote_send_printf ("vFlashErase:%s,%s",
4872 case PACKET_UNKNOWN:
4873 error (_("Remote target does not support flash erase"));
4875 error (_("Error erasing flash with vFlashErase packet"));
4880 do_cleanups (back_to);
4884 remote_flash_write (struct target_ops *ops,
4885 ULONGEST address, LONGEST length,
4886 const gdb_byte *data)
4888 int saved_remote_timeout = remote_timeout;
4890 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
4891 &saved_remote_timeout);
4893 remote_timeout = remote_flash_timeout;
4894 ret = remote_write_bytes_aux ("vFlashWrite:", address, data, length, 'X', 0);
4895 do_cleanups (back_to);
4901 remote_flash_done (struct target_ops *ops)
4903 int saved_remote_timeout = remote_timeout;
4905 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
4906 &saved_remote_timeout);
4908 remote_timeout = remote_flash_timeout;
4909 ret = remote_send_printf ("vFlashDone");
4910 do_cleanups (back_to);
4914 case PACKET_UNKNOWN:
4915 error (_("Remote target does not support vFlashDone"));
4917 error (_("Error finishing flash operation"));
4924 remote_files_info (struct target_ops *ignore)
4926 puts_filtered ("Debugging a target over a serial line.\n");
4929 /* Stuff for dealing with the packets which are part of this protocol.
4930 See comment at top of file for details. */
4932 /* Read a single character from the remote end. */
4935 readchar (int timeout)
4939 ch = serial_readchar (remote_desc, timeout);
4944 switch ((enum serial_rc) ch)
4947 target_mourn_inferior ();
4948 error (_("Remote connection closed"));
4951 perror_with_name (_("Remote communication error"));
4953 case SERIAL_TIMEOUT:
4959 /* Send the command in *BUF to the remote machine, and read the reply
4960 into *BUF. Report an error if we get an error reply. Resize
4961 *BUF using xrealloc if necessary to hold the result, and update
4965 remote_send (char **buf,
4969 getpkt (buf, sizeof_buf, 0);
4971 if ((*buf)[0] == 'E')
4972 error (_("Remote failure reply: %s"), *buf);
4975 /* Display a null-terminated packet on stdout, for debugging, using C
4979 print_packet (char *buf)
4981 puts_filtered ("\"");
4982 fputstr_filtered (buf, '"', gdb_stdout);
4983 puts_filtered ("\"");
4989 return putpkt_binary (buf, strlen (buf));
4992 /* Send a packet to the remote machine, with error checking. The data
4993 of the packet is in BUF. The string in BUF can be at most
4994 get_remote_packet_size () - 5 to account for the $, # and checksum,
4995 and for a possible /0 if we are debugging (remote_debug) and want
4996 to print the sent packet as a string. */
4999 putpkt_binary (char *buf, int cnt)
5001 struct remote_state *rs = get_remote_state ();
5003 unsigned char csum = 0;
5004 char *buf2 = alloca (cnt + 6);
5010 /* Catch cases like trying to read memory or listing threads while
5011 we're waiting for a stop reply. The remote server wouldn't be
5012 ready to handle this request, so we'd hang and timeout. We don't
5013 have to worry about this in synchronous mode, because in that
5014 case it's not possible to issue a command while the target is
5016 if (target_can_async_p () && rs->waiting_for_stop_reply)
5017 error (_("Cannot execute this command while the target is running."));
5019 /* We're sending out a new packet. Make sure we don't look at a
5020 stale cached response. */
5021 rs->cached_wait_status = 0;
5023 /* Copy the packet into buffer BUF2, encapsulating it
5024 and giving it a checksum. */
5029 for (i = 0; i < cnt; i++)
5035 *p++ = tohex ((csum >> 4) & 0xf);
5036 *p++ = tohex (csum & 0xf);
5038 /* Send it over and over until we get a positive ack. */
5042 int started_error_output = 0;
5047 fprintf_unfiltered (gdb_stdlog, "Sending packet: ");
5048 fputstrn_unfiltered (buf2, p - buf2, 0, gdb_stdlog);
5049 fprintf_unfiltered (gdb_stdlog, "...");
5050 gdb_flush (gdb_stdlog);
5052 if (serial_write (remote_desc, buf2, p - buf2))
5053 perror_with_name (_("putpkt: write failed"));
5055 /* If this is a no acks version of the remote protocol, send the
5056 packet and move on. */
5060 /* Read until either a timeout occurs (-2) or '+' is read. */
5063 ch = readchar (remote_timeout);
5071 case SERIAL_TIMEOUT:
5073 if (started_error_output)
5075 putchar_unfiltered ('\n');
5076 started_error_output = 0;
5085 fprintf_unfiltered (gdb_stdlog, "Ack\n");
5089 fprintf_unfiltered (gdb_stdlog, "Nak\n");
5090 case SERIAL_TIMEOUT:
5094 break; /* Retransmit buffer. */
5098 fprintf_unfiltered (gdb_stdlog,
5099 "Packet instead of Ack, ignoring it\n");
5100 /* It's probably an old response sent because an ACK
5101 was lost. Gobble up the packet and ack it so it
5102 doesn't get retransmitted when we resend this
5105 serial_write (remote_desc, "+", 1);
5106 continue; /* Now, go look for +. */
5111 if (!started_error_output)
5113 started_error_output = 1;
5114 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
5116 fputc_unfiltered (ch & 0177, gdb_stdlog);
5120 break; /* Here to retransmit. */
5124 /* This is wrong. If doing a long backtrace, the user should be
5125 able to get out next time we call QUIT, without anything as
5126 violent as interrupt_query. If we want to provide a way out of
5127 here without getting to the next QUIT, it should be based on
5128 hitting ^C twice as in remote_wait. */
5139 /* Come here after finding the start of a frame when we expected an
5140 ack. Do our best to discard the rest of this packet. */
5149 c = readchar (remote_timeout);
5152 case SERIAL_TIMEOUT:
5153 /* Nothing we can do. */
5156 /* Discard the two bytes of checksum and stop. */
5157 c = readchar (remote_timeout);
5159 c = readchar (remote_timeout);
5162 case '*': /* Run length encoding. */
5163 /* Discard the repeat count. */
5164 c = readchar (remote_timeout);
5169 /* A regular character. */
5175 /* Come here after finding the start of the frame. Collect the rest
5176 into *BUF, verifying the checksum, length, and handling run-length
5177 compression. NUL terminate the buffer. If there is not enough room,
5178 expand *BUF using xrealloc.
5180 Returns -1 on error, number of characters in buffer (ignoring the
5181 trailing NULL) on success. (could be extended to return one of the
5182 SERIAL status indications). */
5185 read_frame (char **buf_p,
5192 struct remote_state *rs = get_remote_state ();
5199 c = readchar (remote_timeout);
5202 case SERIAL_TIMEOUT:
5204 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
5208 fputs_filtered ("Saw new packet start in middle of old one\n",
5210 return -1; /* Start a new packet, count retries. */
5213 unsigned char pktcsum;
5219 check_0 = readchar (remote_timeout);
5221 check_1 = readchar (remote_timeout);
5223 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
5226 fputs_filtered ("Timeout in checksum, retrying\n",
5230 else if (check_0 < 0 || check_1 < 0)
5233 fputs_filtered ("Communication error in checksum\n",
5238 /* Don't recompute the checksum; with no ack packets we
5239 don't have any way to indicate a packet retransmission
5244 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
5245 if (csum == pktcsum)
5250 fprintf_filtered (gdb_stdlog,
5251 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
5253 fputstrn_filtered (buf, bc, 0, gdb_stdlog);
5254 fputs_filtered ("\n", gdb_stdlog);
5256 /* Number of characters in buffer ignoring trailing
5260 case '*': /* Run length encoding. */
5265 c = readchar (remote_timeout);
5267 repeat = c - ' ' + 3; /* Compute repeat count. */
5269 /* The character before ``*'' is repeated. */
5271 if (repeat > 0 && repeat <= 255 && bc > 0)
5273 if (bc + repeat - 1 >= *sizeof_buf - 1)
5275 /* Make some more room in the buffer. */
5276 *sizeof_buf += repeat;
5277 *buf_p = xrealloc (*buf_p, *sizeof_buf);
5281 memset (&buf[bc], buf[bc - 1], repeat);
5287 printf_filtered (_("Invalid run length encoding: %s\n"), buf);
5291 if (bc >= *sizeof_buf - 1)
5293 /* Make some more room in the buffer. */
5295 *buf_p = xrealloc (*buf_p, *sizeof_buf);
5306 /* Read a packet from the remote machine, with error checking, and
5307 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
5308 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
5309 rather than timing out; this is used (in synchronous mode) to wait
5310 for a target that is is executing user code to stop. */
5311 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
5312 don't have to change all the calls to getpkt to deal with the
5313 return value, because at the moment I don't know what the right
5314 thing to do it for those. */
5322 timed_out = getpkt_sane (buf, sizeof_buf, forever);
5326 /* Read a packet from the remote machine, with error checking, and
5327 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
5328 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
5329 rather than timing out; this is used (in synchronous mode) to wait
5330 for a target that is is executing user code to stop. If FOREVER ==
5331 0, this function is allowed to time out gracefully and return an
5332 indication of this to the caller. Otherwise return the number
5335 getpkt_sane (char **buf, long *sizeof_buf, int forever)
5337 struct remote_state *rs = get_remote_state ();
5343 /* We're reading a new response. Make sure we don't look at a
5344 previously cached response. */
5345 rs->cached_wait_status = 0;
5347 strcpy (*buf, "timeout");
5351 timeout = watchdog > 0 ? watchdog : -1;
5355 timeout = remote_timeout;
5359 for (tries = 1; tries <= MAX_TRIES; tries++)
5361 /* This can loop forever if the remote side sends us characters
5362 continuously, but if it pauses, we'll get a zero from
5363 readchar because of timeout. Then we'll count that as a
5366 /* Note that we will only wait forever prior to the start of a
5367 packet. After that, we expect characters to arrive at a
5368 brisk pace. They should show up within remote_timeout
5373 c = readchar (timeout);
5375 if (c == SERIAL_TIMEOUT)
5377 if (forever) /* Watchdog went off? Kill the target. */
5380 target_mourn_inferior ();
5381 error (_("Watchdog timeout has expired. Target detached."));
5384 fputs_filtered ("Timed out.\n", gdb_stdlog);
5390 /* We've found the start of a packet, now collect the data. */
5392 val = read_frame (buf, sizeof_buf);
5398 fprintf_unfiltered (gdb_stdlog, "Packet received: ");
5399 fputstrn_unfiltered (*buf, val, 0, gdb_stdlog);
5400 fprintf_unfiltered (gdb_stdlog, "\n");
5403 /* Skip the ack char if we're in no-ack mode. */
5404 if (!rs->noack_mode)
5405 serial_write (remote_desc, "+", 1);
5409 /* Try the whole thing again. */
5411 /* Skip the nack char if we're in no-ack mode. */
5412 if (!rs->noack_mode)
5413 serial_write (remote_desc, "-", 1);
5416 /* We have tried hard enough, and just can't receive the packet.
5419 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
5421 /* Skip the ack char if we're in no-ack mode. */
5422 if (!rs->noack_mode)
5423 serial_write (remote_desc, "+", 1);
5430 /* Unregister the file descriptor from the event loop. */
5431 if (target_is_async_p ())
5432 serial_async (remote_desc, NULL, 0);
5434 /* Use catch_errors so the user can quit from gdb even when we
5435 aren't on speaking terms with the remote system. */
5436 catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
5438 /* Don't wait for it to die. I'm not really sure it matters whether
5439 we do or not. For the existing stubs, kill is a noop. */
5440 target_mourn_inferior ();
5444 remote_vkill (int pid, struct remote_state *rs)
5446 if (remote_protocol_packets[PACKET_vKill].support == PACKET_DISABLE)
5449 /* Tell the remote target to detach. */
5450 sprintf (rs->buf, "vKill;%x", pid);
5452 getpkt (&rs->buf, &rs->buf_size, 0);
5454 if (packet_ok (rs->buf,
5455 &remote_protocol_packets[PACKET_vKill]) == PACKET_OK)
5457 else if (remote_protocol_packets[PACKET_vKill].support == PACKET_DISABLE)
5464 extended_remote_kill (void)
5467 int pid = ptid_get_pid (inferior_ptid);
5468 struct remote_state *rs = get_remote_state ();
5470 res = remote_vkill (pid, rs);
5471 if (res == -1 && !remote_multi_process_p (rs))
5473 /* Don't try 'k' on a multi-process aware stub -- it has no way
5474 to specify the pid. */
5478 getpkt (&rs->buf, &rs->buf_size, 0);
5479 if (rs->buf[0] != 'O' || rs->buf[0] != 'K')
5482 /* Don't wait for it to die. I'm not really sure it matters whether
5483 we do or not. For the existing stubs, kill is a noop. */
5489 error (_("Can't kill process"));
5491 delete_inferior (pid);
5492 target_mourn_inferior ();
5498 remote_mourn_1 (&remote_ops);
5501 /* Worker function for remote_mourn. */
5503 remote_mourn_1 (struct target_ops *target)
5505 /* Get rid of all the inferiors and their threads we were
5507 discard_all_inferiors ();
5509 unpush_target (target);
5510 generic_mourn_inferior ();
5514 select_new_thread_callback (struct thread_info *th, void* data)
5516 if (!ptid_equal (th->ptid, minus_one_ptid))
5518 switch_to_thread (th->ptid);
5519 printf_filtered (_("[Switching to %s]\n"),
5520 target_pid_to_str (inferior_ptid));
5527 extended_remote_mourn_1 (struct target_ops *target)
5529 struct remote_state *rs = get_remote_state ();
5531 /* In case we got here due to an error, but we're going to stay
5533 rs->waiting_for_stop_reply = 0;
5535 /* Unlike "target remote", we do not want to unpush the target; then
5536 the next time the user says "run", we won't be connected. */
5538 if (have_inferiors ())
5540 extern void nullify_last_target_wait_ptid ();
5541 /* Multi-process case. The current process has exited, but
5542 there are other processes to debug. Switch to the first
5544 iterate_over_threads (select_new_thread_callback, NULL);
5545 nullify_last_target_wait_ptid ();
5549 struct remote_state *rs = get_remote_state ();
5551 /* Call common code to mark the inferior as not running. */
5552 generic_mourn_inferior ();
5553 if (!remote_multi_process_p (rs))
5555 /* Check whether the target is running now - some remote stubs
5556 automatically restart after kill. */
5558 getpkt (&rs->buf, &rs->buf_size, 0);
5560 if (rs->buf[0] == 'S' || rs->buf[0] == 'T')
5562 /* Assume that the target has been restarted. Set inferior_ptid
5563 so that bits of core GDB realizes there's something here, e.g.,
5564 so that the user can say "kill" again. */
5565 inferior_ptid = magic_null_ptid;
5569 /* Mark this (still pushed) target as not executable until we
5571 target_mark_exited (target);
5575 /* Always remove execution if this was the last process. */
5576 target_mark_exited (target);
5581 extended_remote_mourn (void)
5583 extended_remote_mourn_1 (&extended_remote_ops);
5587 extended_remote_run (char *args)
5589 struct remote_state *rs = get_remote_state ();
5593 /* If the user has disabled vRun support, or we have detected that
5594 support is not available, do not try it. */
5595 if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE)
5598 strcpy (rs->buf, "vRun;");
5599 len = strlen (rs->buf);
5601 if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ())
5602 error (_("Remote file name too long for run packet"));
5603 len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len, 0);
5605 gdb_assert (args != NULL);
5608 struct cleanup *back_to;
5612 argv = gdb_buildargv (args);
5613 back_to = make_cleanup ((void (*) (void *)) freeargv, argv);
5614 for (i = 0; argv[i] != NULL; i++)
5616 if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ())
5617 error (_("Argument list too long for run packet"));
5618 rs->buf[len++] = ';';
5619 len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len, 0);
5621 do_cleanups (back_to);
5624 rs->buf[len++] = '\0';
5627 getpkt (&rs->buf, &rs->buf_size, 0);
5629 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]) == PACKET_OK)
5631 /* We have a wait response; we don't need it, though. All is well. */
5634 else if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE)
5635 /* It wasn't disabled before, but it is now. */
5639 if (remote_exec_file[0] == '\0')
5640 error (_("Running the default executable on the remote target failed; "
5641 "try \"set remote exec-file\"?"));
5643 error (_("Running \"%s\" on the remote target failed"),
5648 /* In the extended protocol we want to be able to do things like
5649 "run" and have them basically work as expected. So we need
5650 a special create_inferior function. We support changing the
5651 executable file and the command line arguments, but not the
5655 extended_remote_create_inferior_1 (char *exec_file, char *args,
5656 char **env, int from_tty)
5658 /* If running asynchronously, register the target file descriptor
5659 with the event loop. */
5660 if (target_can_async_p ())
5661 target_async (inferior_event_handler, 0);
5663 /* Now restart the remote server. */
5664 if (extended_remote_run (args) == -1)
5666 /* vRun was not supported. Fail if we need it to do what the
5668 if (remote_exec_file[0])
5669 error (_("Remote target does not support \"set remote exec-file\""));
5671 error (_("Remote target does not support \"set args\" or run <ARGS>"));
5673 /* Fall back to "R". */
5674 extended_remote_restart ();
5677 /* Clean up from the last time we ran, before we mark the target
5678 running again. This will mark breakpoints uninserted, and
5679 get_offsets may insert breakpoints. */
5680 init_thread_list ();
5681 init_wait_for_inferior ();
5683 /* Now mark the inferior as running before we do anything else. */
5684 inferior_ptid = magic_null_ptid;
5686 add_inferior (ptid_get_pid (inferior_ptid));
5687 add_thread_silent (inferior_ptid);
5689 target_mark_running (&extended_remote_ops);
5691 /* Get updated offsets, if the stub uses qOffsets. */
5696 extended_remote_create_inferior (char *exec_file, char *args,
5697 char **env, int from_tty)
5699 extended_remote_create_inferior_1 (exec_file, args, env, from_tty);
5703 /* Insert a breakpoint. On targets that have software breakpoint
5704 support, we ask the remote target to do the work; on targets
5705 which don't, we insert a traditional memory breakpoint. */
5708 remote_insert_breakpoint (struct bp_target_info *bp_tgt)
5710 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
5711 If it succeeds, then set the support to PACKET_ENABLE. If it
5712 fails, and the user has explicitly requested the Z support then
5713 report an error, otherwise, mark it disabled and go on. */
5715 if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE)
5717 CORE_ADDR addr = bp_tgt->placed_address;
5718 struct remote_state *rs;
5722 gdbarch_breakpoint_from_pc (target_gdbarch, &addr, &bpsize);
5724 rs = get_remote_state ();
5730 addr = (ULONGEST) remote_address_masked (addr);
5731 p += hexnumstr (p, addr);
5732 sprintf (p, ",%d", bpsize);
5735 getpkt (&rs->buf, &rs->buf_size, 0);
5737 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0]))
5742 bp_tgt->placed_address = addr;
5743 bp_tgt->placed_size = bpsize;
5745 case PACKET_UNKNOWN:
5750 return memory_insert_breakpoint (bp_tgt);
5754 remote_remove_breakpoint (struct bp_target_info *bp_tgt)
5756 CORE_ADDR addr = bp_tgt->placed_address;
5757 struct remote_state *rs = get_remote_state ();
5760 if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE)
5768 addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
5769 p += hexnumstr (p, addr);
5770 sprintf (p, ",%d", bp_tgt->placed_size);
5773 getpkt (&rs->buf, &rs->buf_size, 0);
5775 return (rs->buf[0] == 'E');
5778 return memory_remove_breakpoint (bp_tgt);
5782 watchpoint_to_Z_packet (int type)
5787 return Z_PACKET_WRITE_WP;
5790 return Z_PACKET_READ_WP;
5793 return Z_PACKET_ACCESS_WP;
5796 internal_error (__FILE__, __LINE__,
5797 _("hw_bp_to_z: bad watchpoint type %d"), type);
5802 remote_insert_watchpoint (CORE_ADDR addr, int len, int type)
5804 struct remote_state *rs = get_remote_state ();
5806 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
5808 if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE)
5811 sprintf (rs->buf, "Z%x,", packet);
5812 p = strchr (rs->buf, '\0');
5813 addr = remote_address_masked (addr);
5814 p += hexnumstr (p, (ULONGEST) addr);
5815 sprintf (p, ",%x", len);
5818 getpkt (&rs->buf, &rs->buf_size, 0);
5820 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
5823 case PACKET_UNKNOWN:
5828 internal_error (__FILE__, __LINE__,
5829 _("remote_insert_watchpoint: reached end of function"));
5834 remote_remove_watchpoint (CORE_ADDR addr, int len, int type)
5836 struct remote_state *rs = get_remote_state ();
5838 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
5840 if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE)
5843 sprintf (rs->buf, "z%x,", packet);
5844 p = strchr (rs->buf, '\0');
5845 addr = remote_address_masked (addr);
5846 p += hexnumstr (p, (ULONGEST) addr);
5847 sprintf (p, ",%x", len);
5849 getpkt (&rs->buf, &rs->buf_size, 0);
5851 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
5854 case PACKET_UNKNOWN:
5859 internal_error (__FILE__, __LINE__,
5860 _("remote_remove_watchpoint: reached end of function"));
5864 int remote_hw_watchpoint_limit = -1;
5865 int remote_hw_breakpoint_limit = -1;
5868 remote_check_watch_resources (int type, int cnt, int ot)
5870 if (type == bp_hardware_breakpoint)
5872 if (remote_hw_breakpoint_limit == 0)
5874 else if (remote_hw_breakpoint_limit < 0)
5876 else if (cnt <= remote_hw_breakpoint_limit)
5881 if (remote_hw_watchpoint_limit == 0)
5883 else if (remote_hw_watchpoint_limit < 0)
5887 else if (cnt <= remote_hw_watchpoint_limit)
5894 remote_stopped_by_watchpoint (void)
5896 return remote_stopped_by_watchpoint_p;
5900 remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
5903 if (remote_stopped_by_watchpoint ())
5905 *addr_p = remote_watch_data_address;
5914 remote_insert_hw_breakpoint (struct bp_target_info *bp_tgt)
5917 struct remote_state *rs;
5920 /* The length field should be set to the size of a breakpoint
5921 instruction, even though we aren't inserting one ourselves. */
5923 gdbarch_breakpoint_from_pc
5924 (target_gdbarch, &bp_tgt->placed_address, &bp_tgt->placed_size);
5926 if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
5929 rs = get_remote_state ();
5936 addr = remote_address_masked (bp_tgt->placed_address);
5937 p += hexnumstr (p, (ULONGEST) addr);
5938 sprintf (p, ",%x", bp_tgt->placed_size);
5941 getpkt (&rs->buf, &rs->buf_size, 0);
5943 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
5946 case PACKET_UNKNOWN:
5951 internal_error (__FILE__, __LINE__,
5952 _("remote_insert_hw_breakpoint: reached end of function"));
5957 remote_remove_hw_breakpoint (struct bp_target_info *bp_tgt)
5960 struct remote_state *rs = get_remote_state ();
5963 if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
5970 addr = remote_address_masked (bp_tgt->placed_address);
5971 p += hexnumstr (p, (ULONGEST) addr);
5972 sprintf (p, ",%x", bp_tgt->placed_size);
5975 getpkt (&rs->buf, &rs->buf_size, 0);
5977 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
5980 case PACKET_UNKNOWN:
5985 internal_error (__FILE__, __LINE__,
5986 _("remote_remove_hw_breakpoint: reached end of function"));
5989 /* Some targets are only capable of doing downloads, and afterwards
5990 they switch to the remote serial protocol. This function provides
5991 a clean way to get from the download target to the remote target.
5992 It's basically just a wrapper so that we don't have to expose any
5993 of the internal workings of remote.c.
5995 Prior to calling this routine, you should shutdown the current
5996 target code, else you will get the "A program is being debugged
5997 already..." message. Usually a call to pop_target() suffices. */
6000 push_remote_target (char *name, int from_tty)
6002 printf_filtered (_("Switching to remote protocol\n"));
6003 remote_open (name, from_tty);
6006 /* Table used by the crc32 function to calcuate the checksum. */
6008 static unsigned long crc32_table[256] =
6011 static unsigned long
6012 crc32 (unsigned char *buf, int len, unsigned int crc)
6014 if (!crc32_table[1])
6016 /* Initialize the CRC table and the decoding table. */
6020 for (i = 0; i < 256; i++)
6022 for (c = i << 24, j = 8; j > 0; --j)
6023 c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
6030 crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255];
6036 /* compare-sections command
6038 With no arguments, compares each loadable section in the exec bfd
6039 with the same memory range on the target, and reports mismatches.
6040 Useful for verifying the image on the target against the exec file.
6041 Depends on the target understanding the new "qCRC:" request. */
6043 /* FIXME: cagney/1999-10-26: This command should be broken down into a
6044 target method (target verify memory) and generic version of the
6045 actual command. This will allow other high-level code (especially
6046 generic_load()) to make use of this target functionality. */
6049 compare_sections_command (char *args, int from_tty)
6051 struct remote_state *rs = get_remote_state ();
6053 unsigned long host_crc, target_crc;
6054 extern bfd *exec_bfd;
6055 struct cleanup *old_chain;
6058 const char *sectname;
6065 error (_("command cannot be used without an exec file"));
6066 if (!current_target.to_shortname ||
6067 strcmp (current_target.to_shortname, "remote") != 0)
6068 error (_("command can only be used with remote target"));
6070 for (s = exec_bfd->sections; s; s = s->next)
6072 if (!(s->flags & SEC_LOAD))
6073 continue; /* skip non-loadable section */
6075 size = bfd_get_section_size (s);
6077 continue; /* skip zero-length section */
6079 sectname = bfd_get_section_name (exec_bfd, s);
6080 if (args && strcmp (args, sectname) != 0)
6081 continue; /* not the section selected by user */
6083 matched = 1; /* do this section */
6085 /* FIXME: assumes lma can fit into long. */
6086 xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx",
6087 (long) lma, (long) size);
6090 /* Be clever; compute the host_crc before waiting for target
6092 sectdata = xmalloc (size);
6093 old_chain = make_cleanup (xfree, sectdata);
6094 bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
6095 host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff);
6097 getpkt (&rs->buf, &rs->buf_size, 0);
6098 if (rs->buf[0] == 'E')
6099 error (_("target memory fault, section %s, range 0x%s -- 0x%s"),
6100 sectname, paddr (lma), paddr (lma + size));
6101 if (rs->buf[0] != 'C')
6102 error (_("remote target does not support this operation"));
6104 for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++)
6105 target_crc = target_crc * 16 + fromhex (*tmp);
6107 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
6108 sectname, paddr (lma), paddr (lma + size));
6109 if (host_crc == target_crc)
6110 printf_filtered ("matched.\n");
6113 printf_filtered ("MIS-MATCHED!\n");
6117 do_cleanups (old_chain);
6120 warning (_("One or more sections of the remote executable does not match\n\
6121 the loaded file\n"));
6122 if (args && !matched)
6123 printf_filtered (_("No loaded section named '%s'.\n"), args);
6126 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
6127 into remote target. The number of bytes written to the remote
6128 target is returned, or -1 for error. */
6131 remote_write_qxfer (struct target_ops *ops, const char *object_name,
6132 const char *annex, const gdb_byte *writebuf,
6133 ULONGEST offset, LONGEST len,
6134 struct packet_config *packet)
6139 struct remote_state *rs = get_remote_state ();
6140 int max_size = get_memory_write_packet_size ();
6142 if (packet->support == PACKET_DISABLE)
6145 /* Insert header. */
6146 i = snprintf (rs->buf, max_size,
6147 "qXfer:%s:write:%s:%s:",
6148 object_name, annex ? annex : "",
6149 phex_nz (offset, sizeof offset));
6150 max_size -= (i + 1);
6152 /* Escape as much data as fits into rs->buf. */
6153 buf_len = remote_escape_output
6154 (writebuf, len, (rs->buf + i), &max_size, max_size);
6156 if (putpkt_binary (rs->buf, i + buf_len) < 0
6157 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
6158 || packet_ok (rs->buf, packet) != PACKET_OK)
6161 unpack_varlen_hex (rs->buf, &n);
6165 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
6166 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
6167 number of bytes read is returned, or 0 for EOF, or -1 for error.
6168 The number of bytes read may be less than LEN without indicating an
6169 EOF. PACKET is checked and updated to indicate whether the remote
6170 target supports this object. */
6173 remote_read_qxfer (struct target_ops *ops, const char *object_name,
6175 gdb_byte *readbuf, ULONGEST offset, LONGEST len,
6176 struct packet_config *packet)
6178 static char *finished_object;
6179 static char *finished_annex;
6180 static ULONGEST finished_offset;
6182 struct remote_state *rs = get_remote_state ();
6183 unsigned int total = 0;
6184 LONGEST i, n, packet_len;
6186 if (packet->support == PACKET_DISABLE)
6189 /* Check whether we've cached an end-of-object packet that matches
6191 if (finished_object)
6193 if (strcmp (object_name, finished_object) == 0
6194 && strcmp (annex ? annex : "", finished_annex) == 0
6195 && offset == finished_offset)
6198 /* Otherwise, we're now reading something different. Discard
6200 xfree (finished_object);
6201 xfree (finished_annex);
6202 finished_object = NULL;
6203 finished_annex = NULL;
6206 /* Request only enough to fit in a single packet. The actual data
6207 may not, since we don't know how much of it will need to be escaped;
6208 the target is free to respond with slightly less data. We subtract
6209 five to account for the response type and the protocol frame. */
6210 n = min (get_remote_packet_size () - 5, len);
6211 snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
6212 object_name, annex ? annex : "",
6213 phex_nz (offset, sizeof offset),
6214 phex_nz (n, sizeof n));
6215 i = putpkt (rs->buf);
6220 packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0);
6221 if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK)
6224 if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
6225 error (_("Unknown remote qXfer reply: %s"), rs->buf);
6227 /* 'm' means there is (or at least might be) more data after this
6228 batch. That does not make sense unless there's at least one byte
6229 of data in this reply. */
6230 if (rs->buf[0] == 'm' && packet_len == 1)
6231 error (_("Remote qXfer reply contained no data."));
6233 /* Got some data. */
6234 i = remote_unescape_input (rs->buf + 1, packet_len - 1, readbuf, n);
6236 /* 'l' is an EOF marker, possibly including a final block of data,
6237 or possibly empty. If we have the final block of a non-empty
6238 object, record this fact to bypass a subsequent partial read. */
6239 if (rs->buf[0] == 'l' && offset + i > 0)
6241 finished_object = xstrdup (object_name);
6242 finished_annex = xstrdup (annex ? annex : "");
6243 finished_offset = offset + i;
6250 remote_xfer_partial (struct target_ops *ops, enum target_object object,
6251 const char *annex, gdb_byte *readbuf,
6252 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
6254 struct remote_state *rs;
6259 set_general_thread (inferior_ptid);
6261 rs = get_remote_state ();
6263 /* Handle memory using the standard memory routines. */
6264 if (object == TARGET_OBJECT_MEMORY)
6269 /* If the remote target is connected but not running, we should
6270 pass this request down to a lower stratum (e.g. the executable
6272 if (!target_has_execution)
6275 if (writebuf != NULL)
6276 xfered = remote_write_bytes (offset, writebuf, len);
6278 xfered = remote_read_bytes (offset, readbuf, len);
6282 else if (xfered == 0 && errno == 0)
6288 /* Handle SPU memory using qxfer packets. */
6289 if (object == TARGET_OBJECT_SPU)
6292 return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len,
6293 &remote_protocol_packets
6294 [PACKET_qXfer_spu_read]);
6296 return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len,
6297 &remote_protocol_packets
6298 [PACKET_qXfer_spu_write]);
6301 /* Only handle flash writes. */
6302 if (writebuf != NULL)
6308 case TARGET_OBJECT_FLASH:
6309 xfered = remote_flash_write (ops, offset, len, writebuf);
6313 else if (xfered == 0 && errno == 0)
6323 /* Map pre-existing objects onto letters. DO NOT do this for new
6324 objects!!! Instead specify new query packets. */
6327 case TARGET_OBJECT_AVR:
6331 case TARGET_OBJECT_AUXV:
6332 gdb_assert (annex == NULL);
6333 return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len,
6334 &remote_protocol_packets[PACKET_qXfer_auxv]);
6336 case TARGET_OBJECT_AVAILABLE_FEATURES:
6337 return remote_read_qxfer
6338 (ops, "features", annex, readbuf, offset, len,
6339 &remote_protocol_packets[PACKET_qXfer_features]);
6341 case TARGET_OBJECT_LIBRARIES:
6342 return remote_read_qxfer
6343 (ops, "libraries", annex, readbuf, offset, len,
6344 &remote_protocol_packets[PACKET_qXfer_libraries]);
6346 case TARGET_OBJECT_MEMORY_MAP:
6347 gdb_assert (annex == NULL);
6348 return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len,
6349 &remote_protocol_packets[PACKET_qXfer_memory_map]);
6355 /* Note: a zero OFFSET and LEN can be used to query the minimum
6357 if (offset == 0 && len == 0)
6358 return (get_remote_packet_size ());
6359 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
6360 large enough let the caller deal with it. */
6361 if (len < get_remote_packet_size ())
6363 len = get_remote_packet_size ();
6365 /* Except for querying the minimum buffer size, target must be open. */
6367 error (_("remote query is only available after target open"));
6369 gdb_assert (annex != NULL);
6370 gdb_assert (readbuf != NULL);
6376 /* We used one buffer char for the remote protocol q command and
6377 another for the query type. As the remote protocol encapsulation
6378 uses 4 chars plus one extra in case we are debugging
6379 (remote_debug), we have PBUFZIZ - 7 left to pack the query
6382 while (annex[i] && (i < (get_remote_packet_size () - 8)))
6384 /* Bad caller may have sent forbidden characters. */
6385 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
6390 gdb_assert (annex[i] == '\0');
6392 i = putpkt (rs->buf);
6396 getpkt (&rs->buf, &rs->buf_size, 0);
6397 strcpy ((char *) readbuf, rs->buf);
6399 return strlen ((char *) readbuf);
6403 remote_search_memory (struct target_ops* ops,
6404 CORE_ADDR start_addr, ULONGEST search_space_len,
6405 const gdb_byte *pattern, ULONGEST pattern_len,
6406 CORE_ADDR *found_addrp)
6408 struct remote_state *rs = get_remote_state ();
6409 int max_size = get_memory_write_packet_size ();
6410 struct packet_config *packet =
6411 &remote_protocol_packets[PACKET_qSearch_memory];
6412 /* number of packet bytes used to encode the pattern,
6413 this could be more than PATTERN_LEN due to escape characters */
6414 int escaped_pattern_len;
6415 /* amount of pattern that was encodable in the packet */
6416 int used_pattern_len;
6419 ULONGEST found_addr;
6421 /* Don't go to the target if we don't have to.
6422 This is done before checking packet->support to avoid the possibility that
6423 a success for this edge case means the facility works in general. */
6424 if (pattern_len > search_space_len)
6426 if (pattern_len == 0)
6428 *found_addrp = start_addr;
6432 /* If we already know the packet isn't supported, fall back to the simple
6433 way of searching memory. */
6435 if (packet->support == PACKET_DISABLE)
6437 /* Target doesn't provided special support, fall back and use the
6438 standard support (copy memory and do the search here). */
6439 return simple_search_memory (ops, start_addr, search_space_len,
6440 pattern, pattern_len, found_addrp);
6443 /* Insert header. */
6444 i = snprintf (rs->buf, max_size,
6445 "qSearch:memory:%s;%s;",
6446 paddr_nz (start_addr),
6447 phex_nz (search_space_len, sizeof (search_space_len)));
6448 max_size -= (i + 1);
6450 /* Escape as much data as fits into rs->buf. */
6451 escaped_pattern_len =
6452 remote_escape_output (pattern, pattern_len, (rs->buf + i),
6453 &used_pattern_len, max_size);
6455 /* Bail if the pattern is too large. */
6456 if (used_pattern_len != pattern_len)
6457 error ("Pattern is too large to transmit to remote target.");
6459 if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0
6460 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
6461 || packet_ok (rs->buf, packet) != PACKET_OK)
6463 /* The request may not have worked because the command is not
6464 supported. If so, fall back to the simple way. */
6465 if (packet->support == PACKET_DISABLE)
6467 return simple_search_memory (ops, start_addr, search_space_len,
6468 pattern, pattern_len, found_addrp);
6473 if (rs->buf[0] == '0')
6475 else if (rs->buf[0] == '1')
6478 if (rs->buf[1] != ',')
6479 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
6480 unpack_varlen_hex (rs->buf + 2, &found_addr);
6481 *found_addrp = found_addr;
6484 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
6490 remote_rcmd (char *command,
6491 struct ui_file *outbuf)
6493 struct remote_state *rs = get_remote_state ();
6497 error (_("remote rcmd is only available after target open"));
6499 /* Send a NULL command across as an empty command. */
6500 if (command == NULL)
6503 /* The query prefix. */
6504 strcpy (rs->buf, "qRcmd,");
6505 p = strchr (rs->buf, '\0');
6507 if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/) > get_remote_packet_size ())
6508 error (_("\"monitor\" command ``%s'' is too long."), command);
6510 /* Encode the actual command. */
6511 bin2hex ((gdb_byte *) command, p, 0);
6513 if (putpkt (rs->buf) < 0)
6514 error (_("Communication problem with target."));
6516 /* get/display the response */
6521 /* XXX - see also tracepoint.c:remote_get_noisy_reply(). */
6523 getpkt (&rs->buf, &rs->buf_size, 0);
6526 error (_("Target does not support this command."));
6527 if (buf[0] == 'O' && buf[1] != 'K')
6529 remote_console_output (buf + 1); /* 'O' message from stub. */
6532 if (strcmp (buf, "OK") == 0)
6534 if (strlen (buf) == 3 && buf[0] == 'E'
6535 && isdigit (buf[1]) && isdigit (buf[2]))
6537 error (_("Protocol error with Rcmd"));
6539 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
6541 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
6542 fputc_unfiltered (c, outbuf);
6548 static VEC(mem_region_s) *
6549 remote_memory_map (struct target_ops *ops)
6551 VEC(mem_region_s) *result = NULL;
6552 char *text = target_read_stralloc (¤t_target,
6553 TARGET_OBJECT_MEMORY_MAP, NULL);
6557 struct cleanup *back_to = make_cleanup (xfree, text);
6558 result = parse_memory_map (text);
6559 do_cleanups (back_to);
6566 packet_command (char *args, int from_tty)
6568 struct remote_state *rs = get_remote_state ();
6571 error (_("command can only be used with remote target"));
6574 error (_("remote-packet command requires packet text as argument"));
6576 puts_filtered ("sending: ");
6577 print_packet (args);
6578 puts_filtered ("\n");
6581 getpkt (&rs->buf, &rs->buf_size, 0);
6582 puts_filtered ("received: ");
6583 print_packet (rs->buf);
6584 puts_filtered ("\n");
6588 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
6590 static void display_thread_info (struct gdb_ext_thread_info *info);
6592 static void threadset_test_cmd (char *cmd, int tty);
6594 static void threadalive_test (char *cmd, int tty);
6596 static void threadlist_test_cmd (char *cmd, int tty);
6598 int get_and_display_threadinfo (threadref *ref);
6600 static void threadinfo_test_cmd (char *cmd, int tty);
6602 static int thread_display_step (threadref *ref, void *context);
6604 static void threadlist_update_test_cmd (char *cmd, int tty);
6606 static void init_remote_threadtests (void);
6608 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
6611 threadset_test_cmd (char *cmd, int tty)
6613 int sample_thread = SAMPLE_THREAD;
6615 printf_filtered (_("Remote threadset test\n"));
6616 set_general_thread (sample_thread);
6621 threadalive_test (char *cmd, int tty)
6623 int sample_thread = SAMPLE_THREAD;
6624 int pid = ptid_get_pid (inferior_ptid);
6625 ptid_t ptid = ptid_build (pid, 0, sample_thread);
6627 if (remote_thread_alive (ptid))
6628 printf_filtered ("PASS: Thread alive test\n");
6630 printf_filtered ("FAIL: Thread alive test\n");
6633 void output_threadid (char *title, threadref *ref);
6636 output_threadid (char *title, threadref *ref)
6640 pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
6642 printf_filtered ("%s %s\n", title, (&hexid[0]));
6646 threadlist_test_cmd (char *cmd, int tty)
6649 threadref nextthread;
6650 int done, result_count;
6651 threadref threadlist[3];
6653 printf_filtered ("Remote Threadlist test\n");
6654 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
6655 &result_count, &threadlist[0]))
6656 printf_filtered ("FAIL: threadlist test\n");
6659 threadref *scan = threadlist;
6660 threadref *limit = scan + result_count;
6662 while (scan < limit)
6663 output_threadid (" thread ", scan++);
6668 display_thread_info (struct gdb_ext_thread_info *info)
6670 output_threadid ("Threadid: ", &info->threadid);
6671 printf_filtered ("Name: %s\n ", info->shortname);
6672 printf_filtered ("State: %s\n", info->display);
6673 printf_filtered ("other: %s\n\n", info->more_display);
6677 get_and_display_threadinfo (threadref *ref)
6681 struct gdb_ext_thread_info threadinfo;
6683 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
6684 | TAG_MOREDISPLAY | TAG_DISPLAY;
6685 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
6686 display_thread_info (&threadinfo);
6691 threadinfo_test_cmd (char *cmd, int tty)
6693 int athread = SAMPLE_THREAD;
6697 int_to_threadref (&thread, athread);
6698 printf_filtered ("Remote Threadinfo test\n");
6699 if (!get_and_display_threadinfo (&thread))
6700 printf_filtered ("FAIL cannot get thread info\n");
6704 thread_display_step (threadref *ref, void *context)
6706 /* output_threadid(" threadstep ",ref); *//* simple test */
6707 return get_and_display_threadinfo (ref);
6711 threadlist_update_test_cmd (char *cmd, int tty)
6713 printf_filtered ("Remote Threadlist update test\n");
6714 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
6718 init_remote_threadtests (void)
6720 add_com ("tlist", class_obscure, threadlist_test_cmd, _("\
6721 Fetch and print the remote list of thread identifiers, one pkt only"));
6722 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
6723 _("Fetch and display info about one thread"));
6724 add_com ("tset", class_obscure, threadset_test_cmd,
6725 _("Test setting to a different thread"));
6726 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
6727 _("Iterate through updating all remote thread info"));
6728 add_com ("talive", class_obscure, threadalive_test,
6729 _(" Remote thread alive test "));
6734 /* Convert a thread ID to a string. Returns the string in a static
6738 remote_pid_to_str (ptid_t ptid)
6740 static char buf[64];
6741 struct remote_state *rs = get_remote_state ();
6743 if (ptid_equal (magic_null_ptid, ptid))
6745 xsnprintf (buf, sizeof buf, "Thread <main>");
6748 else if (remote_multi_process_p (rs)
6749 && ptid_get_tid (ptid) != 0 && ptid_get_pid (ptid) != 0)
6751 xsnprintf (buf, sizeof buf, "Thread %d.%ld",
6752 ptid_get_pid (ptid), ptid_get_tid (ptid));
6755 else if (ptid_get_tid (ptid) != 0)
6757 xsnprintf (buf, sizeof buf, "Thread %ld",
6758 ptid_get_tid (ptid));
6762 return normal_pid_to_str (ptid);
6765 /* Get the address of the thread local variable in OBJFILE which is
6766 stored at OFFSET within the thread local storage for thread PTID. */
6769 remote_get_thread_local_address (ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset)
6771 if (remote_protocol_packets[PACKET_qGetTLSAddr].support != PACKET_DISABLE)
6773 struct remote_state *rs = get_remote_state ();
6775 char *endp = rs->buf + get_remote_packet_size ();
6776 enum packet_result result;
6778 strcpy (p, "qGetTLSAddr:");
6780 p = write_ptid (p, endp, ptid);
6782 p += hexnumstr (p, offset);
6784 p += hexnumstr (p, lm);
6788 getpkt (&rs->buf, &rs->buf_size, 0);
6789 result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_qGetTLSAddr]);
6790 if (result == PACKET_OK)
6794 unpack_varlen_hex (rs->buf, &result);
6797 else if (result == PACKET_UNKNOWN)
6798 throw_error (TLS_GENERIC_ERROR,
6799 _("Remote target doesn't support qGetTLSAddr packet"));
6801 throw_error (TLS_GENERIC_ERROR,
6802 _("Remote target failed to process qGetTLSAddr request"));
6805 throw_error (TLS_GENERIC_ERROR,
6806 _("TLS not supported or disabled on this target"));
6811 /* Support for inferring a target description based on the current
6812 architecture and the size of a 'g' packet. While the 'g' packet
6813 can have any size (since optional registers can be left off the
6814 end), some sizes are easily recognizable given knowledge of the
6815 approximate architecture. */
6817 struct remote_g_packet_guess
6820 const struct target_desc *tdesc;
6822 typedef struct remote_g_packet_guess remote_g_packet_guess_s;
6823 DEF_VEC_O(remote_g_packet_guess_s);
6825 struct remote_g_packet_data
6827 VEC(remote_g_packet_guess_s) *guesses;
6830 static struct gdbarch_data *remote_g_packet_data_handle;
6833 remote_g_packet_data_init (struct obstack *obstack)
6835 return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data);
6839 register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
6840 const struct target_desc *tdesc)
6842 struct remote_g_packet_data *data
6843 = gdbarch_data (gdbarch, remote_g_packet_data_handle);
6844 struct remote_g_packet_guess new_guess, *guess;
6847 gdb_assert (tdesc != NULL);
6850 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
6852 if (guess->bytes == bytes)
6853 internal_error (__FILE__, __LINE__,
6854 "Duplicate g packet description added for size %d",
6857 new_guess.bytes = bytes;
6858 new_guess.tdesc = tdesc;
6859 VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess);
6862 static const struct target_desc *
6863 remote_read_description (struct target_ops *target)
6865 struct remote_g_packet_data *data
6866 = gdbarch_data (target_gdbarch, remote_g_packet_data_handle);
6868 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
6870 struct remote_g_packet_guess *guess;
6872 int bytes = send_g_packet ();
6875 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
6877 if (guess->bytes == bytes)
6878 return guess->tdesc;
6880 /* We discard the g packet. A minor optimization would be to
6881 hold on to it, and fill the register cache once we have selected
6882 an architecture, but it's too tricky to do safely. */
6888 /* Remote file transfer support. This is host-initiated I/O, not
6889 target-initiated; for target-initiated, see remote-fileio.c. */
6891 /* If *LEFT is at least the length of STRING, copy STRING to
6892 *BUFFER, update *BUFFER to point to the new end of the buffer, and
6893 decrease *LEFT. Otherwise raise an error. */
6896 remote_buffer_add_string (char **buffer, int *left, char *string)
6898 int len = strlen (string);
6901 error (_("Packet too long for target."));
6903 memcpy (*buffer, string, len);
6907 /* NUL-terminate the buffer as a convenience, if there is
6913 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
6914 *BUFFER, update *BUFFER to point to the new end of the buffer, and
6915 decrease *LEFT. Otherwise raise an error. */
6918 remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
6921 if (2 * len > *left)
6922 error (_("Packet too long for target."));
6924 bin2hex (bytes, *buffer, len);
6928 /* NUL-terminate the buffer as a convenience, if there is
6934 /* If *LEFT is large enough, convert VALUE to hex and add it to
6935 *BUFFER, update *BUFFER to point to the new end of the buffer, and
6936 decrease *LEFT. Otherwise raise an error. */
6939 remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
6941 int len = hexnumlen (value);
6944 error (_("Packet too long for target."));
6946 hexnumstr (*buffer, value);
6950 /* NUL-terminate the buffer as a convenience, if there is
6956 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
6957 value, *REMOTE_ERRNO to the remote error number or zero if none
6958 was included, and *ATTACHMENT to point to the start of the annex
6959 if any. The length of the packet isn't needed here; there may
6960 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
6962 Return 0 if the packet could be parsed, -1 if it could not. If
6963 -1 is returned, the other variables may not be initialized. */
6966 remote_hostio_parse_result (char *buffer, int *retcode,
6967 int *remote_errno, char **attachment)
6974 if (buffer[0] != 'F')
6978 *retcode = strtol (&buffer[1], &p, 16);
6979 if (errno != 0 || p == &buffer[1])
6982 /* Check for ",errno". */
6986 *remote_errno = strtol (p + 1, &p2, 16);
6987 if (errno != 0 || p + 1 == p2)
6992 /* Check for ";attachment". If there is no attachment, the
6993 packet should end here. */
6996 *attachment = p + 1;
6999 else if (*p == '\0')
7005 /* Send a prepared I/O packet to the target and read its response.
7006 The prepared packet is in the global RS->BUF before this function
7007 is called, and the answer is there when we return.
7009 COMMAND_BYTES is the length of the request to send, which may include
7010 binary data. WHICH_PACKET is the packet configuration to check
7011 before attempting a packet. If an error occurs, *REMOTE_ERRNO
7012 is set to the error number and -1 is returned. Otherwise the value
7013 returned by the function is returned.
7015 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
7016 attachment is expected; an error will be reported if there's a
7017 mismatch. If one is found, *ATTACHMENT will be set to point into
7018 the packet buffer and *ATTACHMENT_LEN will be set to the
7019 attachment's length. */
7022 remote_hostio_send_command (int command_bytes, int which_packet,
7023 int *remote_errno, char **attachment,
7024 int *attachment_len)
7026 struct remote_state *rs = get_remote_state ();
7027 int ret, bytes_read;
7028 char *attachment_tmp;
7031 || remote_protocol_packets[which_packet].support == PACKET_DISABLE)
7033 *remote_errno = FILEIO_ENOSYS;
7037 putpkt_binary (rs->buf, command_bytes);
7038 bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0);
7040 /* If it timed out, something is wrong. Don't try to parse the
7044 *remote_errno = FILEIO_EINVAL;
7048 switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
7051 *remote_errno = FILEIO_EINVAL;
7053 case PACKET_UNKNOWN:
7054 *remote_errno = FILEIO_ENOSYS;
7060 if (remote_hostio_parse_result (rs->buf, &ret, remote_errno,
7063 *remote_errno = FILEIO_EINVAL;
7067 /* Make sure we saw an attachment if and only if we expected one. */
7068 if ((attachment_tmp == NULL && attachment != NULL)
7069 || (attachment_tmp != NULL && attachment == NULL))
7071 *remote_errno = FILEIO_EINVAL;
7075 /* If an attachment was found, it must point into the packet buffer;
7076 work out how many bytes there were. */
7077 if (attachment_tmp != NULL)
7079 *attachment = attachment_tmp;
7080 *attachment_len = bytes_read - (*attachment - rs->buf);
7086 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
7087 remote file descriptor, or -1 if an error occurs (and set
7091 remote_hostio_open (const char *filename, int flags, int mode,
7094 struct remote_state *rs = get_remote_state ();
7096 int left = get_remote_packet_size () - 1;
7098 remote_buffer_add_string (&p, &left, "vFile:open:");
7100 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
7102 remote_buffer_add_string (&p, &left, ",");
7104 remote_buffer_add_int (&p, &left, flags);
7105 remote_buffer_add_string (&p, &left, ",");
7107 remote_buffer_add_int (&p, &left, mode);
7109 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open,
7110 remote_errno, NULL, NULL);
7113 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
7114 Return the number of bytes written, or -1 if an error occurs (and
7115 set *REMOTE_ERRNO). */
7118 remote_hostio_pwrite (int fd, const gdb_byte *write_buf, int len,
7119 ULONGEST offset, int *remote_errno)
7121 struct remote_state *rs = get_remote_state ();
7123 int left = get_remote_packet_size ();
7126 remote_buffer_add_string (&p, &left, "vFile:pwrite:");
7128 remote_buffer_add_int (&p, &left, fd);
7129 remote_buffer_add_string (&p, &left, ",");
7131 remote_buffer_add_int (&p, &left, offset);
7132 remote_buffer_add_string (&p, &left, ",");
7134 p += remote_escape_output (write_buf, len, p, &out_len,
7135 get_remote_packet_size () - (p - rs->buf));
7137 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite,
7138 remote_errno, NULL, NULL);
7141 /* Read up to LEN bytes FD on the remote target into READ_BUF
7142 Return the number of bytes read, or -1 if an error occurs (and
7143 set *REMOTE_ERRNO). */
7146 remote_hostio_pread (int fd, gdb_byte *read_buf, int len,
7147 ULONGEST offset, int *remote_errno)
7149 struct remote_state *rs = get_remote_state ();
7152 int left = get_remote_packet_size ();
7153 int ret, attachment_len;
7156 remote_buffer_add_string (&p, &left, "vFile:pread:");
7158 remote_buffer_add_int (&p, &left, fd);
7159 remote_buffer_add_string (&p, &left, ",");
7161 remote_buffer_add_int (&p, &left, len);
7162 remote_buffer_add_string (&p, &left, ",");
7164 remote_buffer_add_int (&p, &left, offset);
7166 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread,
7167 remote_errno, &attachment,
7173 read_len = remote_unescape_input (attachment, attachment_len,
7175 if (read_len != ret)
7176 error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
7181 /* Close FD on the remote target. Return 0, or -1 if an error occurs
7182 (and set *REMOTE_ERRNO). */
7185 remote_hostio_close (int fd, int *remote_errno)
7187 struct remote_state *rs = get_remote_state ();
7189 int left = get_remote_packet_size () - 1;
7191 remote_buffer_add_string (&p, &left, "vFile:close:");
7193 remote_buffer_add_int (&p, &left, fd);
7195 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close,
7196 remote_errno, NULL, NULL);
7199 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
7200 occurs (and set *REMOTE_ERRNO). */
7203 remote_hostio_unlink (const char *filename, int *remote_errno)
7205 struct remote_state *rs = get_remote_state ();
7207 int left = get_remote_packet_size () - 1;
7209 remote_buffer_add_string (&p, &left, "vFile:unlink:");
7211 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
7214 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink,
7215 remote_errno, NULL, NULL);
7219 remote_fileio_errno_to_host (int errnum)
7243 case FILEIO_ENOTDIR:
7263 case FILEIO_ENAMETOOLONG:
7264 return ENAMETOOLONG;
7270 remote_hostio_error (int errnum)
7272 int host_error = remote_fileio_errno_to_host (errnum);
7274 if (host_error == -1)
7275 error (_("Unknown remote I/O error %d"), errnum);
7277 error (_("Remote I/O error: %s"), safe_strerror (host_error));
7281 fclose_cleanup (void *file)
7287 remote_hostio_close_cleanup (void *opaque)
7289 int fd = *(int *) opaque;
7292 remote_hostio_close (fd, &remote_errno);
7297 remote_bfd_iovec_open (struct bfd *abfd, void *open_closure)
7299 const char *filename = bfd_get_filename (abfd);
7300 int fd, remote_errno;
7303 gdb_assert (remote_filename_p (filename));
7305 fd = remote_hostio_open (filename + 7, FILEIO_O_RDONLY, 0, &remote_errno);
7308 errno = remote_fileio_errno_to_host (remote_errno);
7309 bfd_set_error (bfd_error_system_call);
7313 stream = xmalloc (sizeof (int));
7319 remote_bfd_iovec_close (struct bfd *abfd, void *stream)
7321 int fd = *(int *)stream;
7326 /* Ignore errors on close; these may happen if the remote
7327 connection was already torn down. */
7328 remote_hostio_close (fd, &remote_errno);
7334 remote_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf,
7335 file_ptr nbytes, file_ptr offset)
7337 int fd = *(int *)stream;
7339 file_ptr pos, bytes;
7342 while (nbytes > pos)
7344 bytes = remote_hostio_pread (fd, (char *)buf + pos, nbytes - pos,
7345 offset + pos, &remote_errno);
7347 /* Success, but no bytes, means end-of-file. */
7351 errno = remote_fileio_errno_to_host (remote_errno);
7352 bfd_set_error (bfd_error_system_call);
7363 remote_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb)
7365 /* FIXME: We should probably implement remote_hostio_stat. */
7366 sb->st_size = INT_MAX;
7371 remote_filename_p (const char *filename)
7373 return strncmp (filename, "remote:", 7) == 0;
7377 remote_bfd_open (const char *remote_file, const char *target)
7379 return bfd_openr_iovec (remote_file, target,
7380 remote_bfd_iovec_open, NULL,
7381 remote_bfd_iovec_pread,
7382 remote_bfd_iovec_close,
7383 remote_bfd_iovec_stat);
7387 remote_file_put (const char *local_file, const char *remote_file, int from_tty)
7389 struct cleanup *back_to, *close_cleanup;
7390 int retcode, fd, remote_errno, bytes, io_size;
7393 int bytes_in_buffer;
7398 error (_("command can only be used with remote target"));
7400 file = fopen (local_file, "rb");
7402 perror_with_name (local_file);
7403 back_to = make_cleanup (fclose_cleanup, file);
7405 fd = remote_hostio_open (remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
7407 0700, &remote_errno);
7409 remote_hostio_error (remote_errno);
7411 /* Send up to this many bytes at once. They won't all fit in the
7412 remote packet limit, so we'll transfer slightly fewer. */
7413 io_size = get_remote_packet_size ();
7414 buffer = xmalloc (io_size);
7415 make_cleanup (xfree, buffer);
7417 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
7419 bytes_in_buffer = 0;
7422 while (bytes_in_buffer || !saw_eof)
7426 bytes = fread (buffer + bytes_in_buffer, 1, io_size - bytes_in_buffer,
7431 error (_("Error reading %s."), local_file);
7434 /* EOF. Unless there is something still in the
7435 buffer from the last iteration, we are done. */
7437 if (bytes_in_buffer == 0)
7445 bytes += bytes_in_buffer;
7446 bytes_in_buffer = 0;
7448 retcode = remote_hostio_pwrite (fd, buffer, bytes, offset, &remote_errno);
7451 remote_hostio_error (remote_errno);
7452 else if (retcode == 0)
7453 error (_("Remote write of %d bytes returned 0!"), bytes);
7454 else if (retcode < bytes)
7456 /* Short write. Save the rest of the read data for the next
7458 bytes_in_buffer = bytes - retcode;
7459 memmove (buffer, buffer + retcode, bytes_in_buffer);
7465 discard_cleanups (close_cleanup);
7466 if (remote_hostio_close (fd, &remote_errno))
7467 remote_hostio_error (remote_errno);
7470 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
7471 do_cleanups (back_to);
7475 remote_file_get (const char *remote_file, const char *local_file, int from_tty)
7477 struct cleanup *back_to, *close_cleanup;
7478 int retcode, fd, remote_errno, bytes, io_size;
7484 error (_("command can only be used with remote target"));
7486 fd = remote_hostio_open (remote_file, FILEIO_O_RDONLY, 0, &remote_errno);
7488 remote_hostio_error (remote_errno);
7490 file = fopen (local_file, "wb");
7492 perror_with_name (local_file);
7493 back_to = make_cleanup (fclose_cleanup, file);
7495 /* Send up to this many bytes at once. They won't all fit in the
7496 remote packet limit, so we'll transfer slightly fewer. */
7497 io_size = get_remote_packet_size ();
7498 buffer = xmalloc (io_size);
7499 make_cleanup (xfree, buffer);
7501 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
7506 bytes = remote_hostio_pread (fd, buffer, io_size, offset, &remote_errno);
7508 /* Success, but no bytes, means end-of-file. */
7511 remote_hostio_error (remote_errno);
7515 bytes = fwrite (buffer, 1, bytes, file);
7517 perror_with_name (local_file);
7520 discard_cleanups (close_cleanup);
7521 if (remote_hostio_close (fd, &remote_errno))
7522 remote_hostio_error (remote_errno);
7525 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
7526 do_cleanups (back_to);
7530 remote_file_delete (const char *remote_file, int from_tty)
7532 int retcode, remote_errno;
7535 error (_("command can only be used with remote target"));
7537 retcode = remote_hostio_unlink (remote_file, &remote_errno);
7539 remote_hostio_error (remote_errno);
7542 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
7546 remote_put_command (char *args, int from_tty)
7548 struct cleanup *back_to;
7552 error_no_arg (_("file to put"));
7554 argv = gdb_buildargv (args);
7555 back_to = make_cleanup_freeargv (argv);
7556 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
7557 error (_("Invalid parameters to remote put"));
7559 remote_file_put (argv[0], argv[1], from_tty);
7561 do_cleanups (back_to);
7565 remote_get_command (char *args, int from_tty)
7567 struct cleanup *back_to;
7571 error_no_arg (_("file to get"));
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 get"));
7578 remote_file_get (argv[0], argv[1], from_tty);
7580 do_cleanups (back_to);
7584 remote_delete_command (char *args, int from_tty)
7586 struct cleanup *back_to;
7590 error_no_arg (_("file to delete"));
7592 argv = gdb_buildargv (args);
7593 back_to = make_cleanup_freeargv (argv);
7594 if (argv[0] == NULL || argv[1] != NULL)
7595 error (_("Invalid parameters to remote delete"));
7597 remote_file_delete (argv[0], from_tty);
7599 do_cleanups (back_to);
7603 remote_command (char *args, int from_tty)
7605 help_list (remote_cmdlist, "remote ", -1, gdb_stdout);
7609 init_remote_ops (void)
7611 remote_ops.to_shortname = "remote";
7612 remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
7614 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
7615 Specify the serial device it is connected to\n\
7616 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
7617 remote_ops.to_open = remote_open;
7618 remote_ops.to_close = remote_close;
7619 remote_ops.to_detach = remote_detach;
7620 remote_ops.to_disconnect = remote_disconnect;
7621 remote_ops.to_resume = remote_resume;
7622 remote_ops.to_wait = remote_wait;
7623 remote_ops.to_fetch_registers = remote_fetch_registers;
7624 remote_ops.to_store_registers = remote_store_registers;
7625 remote_ops.to_prepare_to_store = remote_prepare_to_store;
7626 remote_ops.deprecated_xfer_memory = remote_xfer_memory;
7627 remote_ops.to_files_info = remote_files_info;
7628 remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
7629 remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
7630 remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
7631 remote_ops.to_stopped_data_address = remote_stopped_data_address;
7632 remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
7633 remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
7634 remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
7635 remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
7636 remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
7637 remote_ops.to_kill = remote_kill;
7638 remote_ops.to_load = generic_load;
7639 remote_ops.to_mourn_inferior = remote_mourn;
7640 remote_ops.to_thread_alive = remote_thread_alive;
7641 remote_ops.to_find_new_threads = remote_threads_info;
7642 remote_ops.to_pid_to_str = remote_pid_to_str;
7643 remote_ops.to_extra_thread_info = remote_threads_extra_info;
7644 remote_ops.to_stop = remote_stop;
7645 remote_ops.to_xfer_partial = remote_xfer_partial;
7646 remote_ops.to_rcmd = remote_rcmd;
7647 remote_ops.to_log_command = serial_log_command;
7648 remote_ops.to_get_thread_local_address = remote_get_thread_local_address;
7649 remote_ops.to_stratum = process_stratum;
7650 remote_ops.to_has_all_memory = 1;
7651 remote_ops.to_has_memory = 1;
7652 remote_ops.to_has_stack = 1;
7653 remote_ops.to_has_registers = 1;
7654 remote_ops.to_has_execution = 1;
7655 remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
7656 remote_ops.to_magic = OPS_MAGIC;
7657 remote_ops.to_memory_map = remote_memory_map;
7658 remote_ops.to_flash_erase = remote_flash_erase;
7659 remote_ops.to_flash_done = remote_flash_done;
7660 remote_ops.to_read_description = remote_read_description;
7661 remote_ops.to_search_memory = remote_search_memory;
7662 remote_ops.to_can_async_p = remote_can_async_p;
7663 remote_ops.to_is_async_p = remote_is_async_p;
7664 remote_ops.to_async = remote_async;
7665 remote_ops.to_async_mask = remote_async_mask;
7666 remote_ops.to_terminal_inferior = remote_terminal_inferior;
7667 remote_ops.to_terminal_ours = remote_terminal_ours;
7670 /* Set up the extended remote vector by making a copy of the standard
7671 remote vector and adding to it. */
7674 init_extended_remote_ops (void)
7676 extended_remote_ops = remote_ops;
7678 extended_remote_ops.to_shortname = "extended-remote";
7679 extended_remote_ops.to_longname =
7680 "Extended remote serial target in gdb-specific protocol";
7681 extended_remote_ops.to_doc =
7682 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
7683 Specify the serial device it is connected to (e.g. /dev/ttya).";
7684 extended_remote_ops.to_open = extended_remote_open;
7685 extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
7686 extended_remote_ops.to_mourn_inferior = extended_remote_mourn;
7687 extended_remote_ops.to_detach = extended_remote_detach;
7688 extended_remote_ops.to_attach = extended_remote_attach;
7689 extended_remote_ops.to_kill = extended_remote_kill;
7693 remote_can_async_p (void)
7695 if (!target_async_permitted)
7696 /* We only enable async when the user specifically asks for it. */
7699 /* We're async whenever the serial device is. */
7700 return remote_async_mask_value && serial_can_async_p (remote_desc);
7704 remote_is_async_p (void)
7706 if (!target_async_permitted)
7707 /* We only enable async when the user specifically asks for it. */
7710 /* We're async whenever the serial device is. */
7711 return remote_async_mask_value && serial_is_async_p (remote_desc);
7714 /* Pass the SERIAL event on and up to the client. One day this code
7715 will be able to delay notifying the client of an event until the
7716 point where an entire packet has been received. */
7718 static void (*async_client_callback) (enum inferior_event_type event_type,
7720 static void *async_client_context;
7721 static serial_event_ftype remote_async_serial_handler;
7724 remote_async_serial_handler (struct serial *scb, void *context)
7726 /* Don't propogate error information up to the client. Instead let
7727 the client find out about the error by querying the target. */
7728 async_client_callback (INF_REG_EVENT, async_client_context);
7732 remote_async (void (*callback) (enum inferior_event_type event_type,
7733 void *context), void *context)
7735 if (remote_async_mask_value == 0)
7736 internal_error (__FILE__, __LINE__,
7737 _("Calling remote_async when async is masked"));
7739 if (callback != NULL)
7741 serial_async (remote_desc, remote_async_serial_handler, NULL);
7742 async_client_callback = callback;
7743 async_client_context = context;
7746 serial_async (remote_desc, NULL, NULL);
7750 remote_async_mask (int new_mask)
7752 int curr_mask = remote_async_mask_value;
7753 remote_async_mask_value = new_mask;
7758 set_remote_cmd (char *args, int from_tty)
7760 help_list (remote_set_cmdlist, "set remote ", -1, gdb_stdout);
7764 show_remote_cmd (char *args, int from_tty)
7766 /* We can't just use cmd_show_list here, because we want to skip
7767 the redundant "show remote Z-packet" and the legacy aliases. */
7768 struct cleanup *showlist_chain;
7769 struct cmd_list_element *list = remote_show_cmdlist;
7771 showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist");
7772 for (; list != NULL; list = list->next)
7773 if (strcmp (list->name, "Z-packet") == 0)
7775 else if (list->type == not_set_cmd)
7776 /* Alias commands are exactly like the original, except they
7777 don't have the normal type. */
7781 struct cleanup *option_chain
7782 = make_cleanup_ui_out_tuple_begin_end (uiout, "option");
7783 ui_out_field_string (uiout, "name", list->name);
7784 ui_out_text (uiout, ": ");
7785 if (list->type == show_cmd)
7786 do_setshow_command ((char *) NULL, from_tty, list);
7788 cmd_func (list, NULL, from_tty);
7789 /* Close the tuple. */
7790 do_cleanups (option_chain);
7793 /* Close the tuple. */
7794 do_cleanups (showlist_chain);
7798 /* Function to be called whenever a new objfile (shlib) is detected. */
7800 remote_new_objfile (struct objfile *objfile)
7802 if (remote_desc != 0) /* Have a remote connection. */
7803 remote_check_symbols (objfile);
7807 _initialize_remote (void)
7809 struct remote_state *rs;
7811 /* architecture specific data */
7812 remote_gdbarch_data_handle =
7813 gdbarch_data_register_post_init (init_remote_state);
7814 remote_g_packet_data_handle =
7815 gdbarch_data_register_pre_init (remote_g_packet_data_init);
7817 /* Initialize the per-target state. At the moment there is only one
7818 of these, not one per target. Only one target is active at a
7819 time. The default buffer size is unimportant; it will be expanded
7820 whenever a larger buffer is needed. */
7821 rs = get_remote_state_raw ();
7823 rs->buf = xmalloc (rs->buf_size);
7826 add_target (&remote_ops);
7828 init_extended_remote_ops ();
7829 add_target (&extended_remote_ops);
7831 /* Hook into new objfile notification. */
7832 observer_attach_new_objfile (remote_new_objfile);
7834 /* Set up signal handlers. */
7835 sigint_remote_token =
7836 create_async_signal_handler (async_remote_interrupt, NULL);
7837 sigint_remote_twice_token =
7838 create_async_signal_handler (inferior_event_handler_wrapper, NULL);
7841 init_remote_threadtests ();
7844 /* set/show remote ... */
7846 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
7847 Remote protocol specific variables\n\
7848 Configure various remote-protocol specific variables such as\n\
7849 the packets being used"),
7850 &remote_set_cmdlist, "set remote ",
7851 0 /* allow-unknown */, &setlist);
7852 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
7853 Remote protocol specific variables\n\
7854 Configure various remote-protocol specific variables such as\n\
7855 the packets being used"),
7856 &remote_show_cmdlist, "show remote ",
7857 0 /* allow-unknown */, &showlist);
7859 add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
7860 Compare section data on target to the exec file.\n\
7861 Argument is a single section name (default: all loaded sections)."),
7864 add_cmd ("packet", class_maintenance, packet_command, _("\
7865 Send an arbitrary packet to a remote target.\n\
7866 maintenance packet TEXT\n\
7867 If GDB is talking to an inferior via the GDB serial protocol, then\n\
7868 this command sends the string TEXT to the inferior, and displays the\n\
7869 response packet. GDB supplies the initial `$' character, and the\n\
7870 terminating `#' character and checksum."),
7873 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
7874 Set whether to send break if interrupted."), _("\
7875 Show whether to send break if interrupted."), _("\
7876 If set, a break, instead of a cntrl-c, is sent to the remote target."),
7877 NULL, NULL, /* FIXME: i18n: Whether to send break if interrupted is %s. */
7878 &setlist, &showlist);
7880 /* Install commands for configuring memory read/write packets. */
7882 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
7883 Set the maximum number of bytes per memory write packet (deprecated)."),
7885 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
7886 Show the maximum number of bytes per memory write packet (deprecated)."),
7888 add_cmd ("memory-write-packet-size", no_class,
7889 set_memory_write_packet_size, _("\
7890 Set the maximum number of bytes per memory-write packet.\n\
7891 Specify the number of bytes in a packet or 0 (zero) for the\n\
7892 default packet size. The actual limit is further reduced\n\
7893 dependent on the target. Specify ``fixed'' to disable the\n\
7894 further restriction and ``limit'' to enable that restriction."),
7895 &remote_set_cmdlist);
7896 add_cmd ("memory-read-packet-size", no_class,
7897 set_memory_read_packet_size, _("\
7898 Set the maximum number of bytes per memory-read packet.\n\
7899 Specify the number of bytes in a packet or 0 (zero) for the\n\
7900 default packet size. The actual limit is further reduced\n\
7901 dependent on the target. Specify ``fixed'' to disable the\n\
7902 further restriction and ``limit'' to enable that restriction."),
7903 &remote_set_cmdlist);
7904 add_cmd ("memory-write-packet-size", no_class,
7905 show_memory_write_packet_size,
7906 _("Show the maximum number of bytes per memory-write packet."),
7907 &remote_show_cmdlist);
7908 add_cmd ("memory-read-packet-size", no_class,
7909 show_memory_read_packet_size,
7910 _("Show the maximum number of bytes per memory-read packet."),
7911 &remote_show_cmdlist);
7913 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class,
7914 &remote_hw_watchpoint_limit, _("\
7915 Set the maximum number of target hardware watchpoints."), _("\
7916 Show the maximum number of target hardware watchpoints."), _("\
7917 Specify a negative limit for unlimited."),
7918 NULL, NULL, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
7919 &remote_set_cmdlist, &remote_show_cmdlist);
7920 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class,
7921 &remote_hw_breakpoint_limit, _("\
7922 Set the maximum number of target hardware breakpoints."), _("\
7923 Show the maximum number of target hardware breakpoints."), _("\
7924 Specify a negative limit for unlimited."),
7925 NULL, NULL, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
7926 &remote_set_cmdlist, &remote_show_cmdlist);
7928 add_setshow_integer_cmd ("remoteaddresssize", class_obscure,
7929 &remote_address_size, _("\
7930 Set the maximum size of the address (in bits) in a memory packet."), _("\
7931 Show the maximum size of the address (in bits) in a memory packet."), NULL,
7933 NULL, /* FIXME: i18n: */
7934 &setlist, &showlist);
7936 add_packet_config_cmd (&remote_protocol_packets[PACKET_X],
7937 "X", "binary-download", 1);
7939 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont],
7940 "vCont", "verbose-resume", 0);
7942 add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals],
7943 "QPassSignals", "pass-signals", 0);
7945 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol],
7946 "qSymbol", "symbol-lookup", 0);
7948 add_packet_config_cmd (&remote_protocol_packets[PACKET_P],
7949 "P", "set-register", 1);
7951 add_packet_config_cmd (&remote_protocol_packets[PACKET_p],
7952 "p", "fetch-register", 1);
7954 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0],
7955 "Z0", "software-breakpoint", 0);
7957 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1],
7958 "Z1", "hardware-breakpoint", 0);
7960 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2],
7961 "Z2", "write-watchpoint", 0);
7963 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3],
7964 "Z3", "read-watchpoint", 0);
7966 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4],
7967 "Z4", "access-watchpoint", 0);
7969 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv],
7970 "qXfer:auxv:read", "read-aux-vector", 0);
7972 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features],
7973 "qXfer:features:read", "target-features", 0);
7975 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries],
7976 "qXfer:libraries:read", "library-info", 0);
7978 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map],
7979 "qXfer:memory-map:read", "memory-map", 0);
7981 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read],
7982 "qXfer:spu:read", "read-spu-object", 0);
7984 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write],
7985 "qXfer:spu:write", "write-spu-object", 0);
7987 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
7988 "qGetTLSAddr", "get-thread-local-storage-address",
7991 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported],
7992 "qSupported", "supported-packets", 0);
7994 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory],
7995 "qSearch:memory", "search-memory", 0);
7997 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open],
7998 "vFile:open", "hostio-open", 0);
8000 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread],
8001 "vFile:pread", "hostio-pread", 0);
8003 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite],
8004 "vFile:pwrite", "hostio-pwrite", 0);
8006 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close],
8007 "vFile:close", "hostio-close", 0);
8009 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink],
8010 "vFile:unlink", "hostio-unlink", 0);
8012 add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach],
8013 "vAttach", "attach", 0);
8015 add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
8018 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode],
8019 "QStartNoAckMode", "noack", 0);
8021 add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill],
8022 "vKill", "kill", 0);
8024 /* Keep the old ``set remote Z-packet ...'' working. Each individual
8025 Z sub-packet has its own set and show commands, but users may
8026 have sets to this variable in their .gdbinit files (or in their
8028 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
8029 &remote_Z_packet_detect, _("\
8030 Set use of remote protocol `Z' packets"), _("\
8031 Show use of remote protocol `Z' packets "), _("\
8032 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
8034 set_remote_protocol_Z_packet_cmd,
8035 show_remote_protocol_Z_packet_cmd, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
8036 &remote_set_cmdlist, &remote_show_cmdlist);
8038 add_prefix_cmd ("remote", class_files, remote_command, _("\
8039 Manipulate files on the remote system\n\
8040 Transfer files to and from the remote target system."),
8041 &remote_cmdlist, "remote ",
8042 0 /* allow-unknown */, &cmdlist);
8044 add_cmd ("put", class_files, remote_put_command,
8045 _("Copy a local file to the remote system."),
8048 add_cmd ("get", class_files, remote_get_command,
8049 _("Copy a remote file to the local system."),
8052 add_cmd ("delete", class_files, remote_delete_command,
8053 _("Delete a remote file."),
8056 remote_exec_file = xstrdup ("");
8057 add_setshow_string_noescape_cmd ("exec-file", class_files,
8058 &remote_exec_file, _("\
8059 Set the remote pathname for \"run\""), _("\
8060 Show the remote pathname for \"run\""), NULL, NULL, NULL,
8061 &remote_set_cmdlist, &remote_show_cmdlist);
8063 /* Eventually initialize fileio. See fileio.c */
8064 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
8066 /* Take advantage of the fact that the LWP field is not used, to tag
8067 special ptids with it set to != 0. */
8068 magic_null_ptid = ptid_build (42000, 1, -1);
8069 not_sent_ptid = ptid_build (42000, 1, -2);
8070 any_thread_ptid = ptid_build (42000, 1, 0);