1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
4 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
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 2 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, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
24 /* See the GDB User Guide for details of the GDB remote protocol. */
27 #include "gdb_string.h"
33 #include "exceptions.h"
35 /*#include "terminal.h" */
38 #include "gdb-stabs.h"
39 #include "gdbthread.h"
43 #include "gdb_assert.h"
50 #include "event-loop.h"
51 #include "event-top.h"
57 #include "gdbcore.h" /* for exec_bfd */
59 #include "remote-fileio.h"
61 /* Prototypes for local functions. */
62 static void cleanup_sigint_signal_handler (void *dummy);
63 static void initialize_sigint_signal_handler (void);
64 static int getpkt_sane (char *buf, long sizeof_buf, int forever);
66 static void handle_remote_sigint (int);
67 static void handle_remote_sigint_twice (int);
68 static void async_remote_interrupt (gdb_client_data);
69 void async_remote_interrupt_twice (gdb_client_data);
71 static void build_remote_gdbarch_data (void);
73 static void remote_files_info (struct target_ops *ignore);
75 static void remote_prepare_to_store (void);
77 static void remote_fetch_registers (int regno);
79 static void remote_resume (ptid_t ptid, int step,
80 enum target_signal siggnal);
81 static void remote_async_resume (ptid_t ptid, int step,
82 enum target_signal siggnal);
83 static void remote_open (char *name, int from_tty);
84 static void remote_async_open (char *name, int from_tty);
86 static void extended_remote_open (char *name, int from_tty);
87 static void extended_remote_async_open (char *name, int from_tty);
89 static void remote_open_1 (char *, int, struct target_ops *, int extended_p,
92 static void remote_close (int quitting);
94 static void remote_store_registers (int regno);
96 static void remote_mourn (void);
97 static void remote_async_mourn (void);
99 static void extended_remote_restart (void);
101 static void extended_remote_mourn (void);
103 static void remote_mourn_1 (struct target_ops *);
105 static void remote_send (char *buf, long sizeof_buf);
107 static int readchar (int timeout);
109 static ptid_t remote_wait (ptid_t ptid,
110 struct target_waitstatus *status);
111 static ptid_t remote_async_wait (ptid_t ptid,
112 struct target_waitstatus *status);
114 static void remote_kill (void);
115 static void remote_async_kill (void);
117 static int tohex (int nib);
119 static void remote_detach (char *args, int from_tty);
121 static void remote_interrupt (int signo);
123 static void remote_interrupt_twice (int signo);
125 static void interrupt_query (void);
127 static void set_thread (int, int);
129 static int remote_thread_alive (ptid_t);
131 static void get_offsets (void);
133 static long read_frame (char *buf, long sizeof_buf);
135 static int remote_insert_breakpoint (CORE_ADDR, bfd_byte *);
137 static int remote_remove_breakpoint (CORE_ADDR, bfd_byte *);
139 static int hexnumlen (ULONGEST num);
141 static void init_remote_ops (void);
143 static void init_extended_remote_ops (void);
145 static void remote_stop (void);
147 static int ishex (int ch, int *val);
149 static int stubhex (int ch);
151 static int hexnumstr (char *, ULONGEST);
153 static int hexnumnstr (char *, ULONGEST, int);
155 static CORE_ADDR remote_address_masked (CORE_ADDR);
157 static void print_packet (char *);
159 static unsigned long crc32 (unsigned char *, int, unsigned int);
161 static void compare_sections_command (char *, int);
163 static void packet_command (char *, int);
165 static int stub_unpack_int (char *buff, int fieldlength);
167 static ptid_t remote_current_thread (ptid_t oldptid);
169 static void remote_find_new_threads (void);
171 static void record_currthread (int currthread);
173 static int fromhex (int a);
175 static int hex2bin (const char *hex, gdb_byte *bin, int count);
177 static int bin2hex (const gdb_byte *bin, char *hex, int count);
179 static int putpkt_binary (char *buf, int cnt);
181 static void check_binary_download (CORE_ADDR addr);
183 struct packet_config;
185 static void show_packet_config_cmd (struct packet_config *config);
187 static void update_packet_config (struct packet_config *config);
189 void _initialize_remote (void);
191 /* Description of the remote protocol. Strictly speaking, when the
192 target is open()ed, remote.c should create a per-target description
193 of the remote protocol using that target's architecture.
194 Unfortunately, the target stack doesn't include local state. For
195 the moment keep the information in the target's architecture
200 long offset; /* Offset into G packet. */
201 long regnum; /* GDB's internal register number. */
202 LONGEST pnum; /* Remote protocol register number. */
203 int in_g_packet; /* Always part of G packet. */
204 /* long size in bytes; == register_size (current_gdbarch, regnum);
206 /* char *name; == REGISTER_NAME (regnum); at present. */
211 /* Description of the remote protocol registers. */
212 long sizeof_g_packet;
214 /* Description of the remote protocol registers indexed by REGNUM
215 (making an array of NUM_REGS + NUM_PSEUDO_REGS in size). */
216 struct packet_reg *regs;
218 /* This is the size (in chars) of the first response to the ``g''
219 packet. It is used as a heuristic when determining the maximum
220 size of memory-read and memory-write packets. A target will
221 typically only reserve a buffer large enough to hold the ``g''
222 packet. The size does not include packet overhead (headers and
224 long actual_register_packet_size;
226 /* This is the maximum size (in chars) of a non read/write packet.
227 It is also used as a cap on the size of read/write packets. */
228 long remote_packet_size;
232 /* Handle for retreving the remote protocol data from gdbarch. */
233 static struct gdbarch_data *remote_gdbarch_data_handle;
235 static struct remote_state *
236 get_remote_state (void)
238 return gdbarch_data (current_gdbarch, remote_gdbarch_data_handle);
242 init_remote_state (struct gdbarch *gdbarch)
245 struct remote_state *rs = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_state);
247 rs->sizeof_g_packet = 0;
249 /* Assume a 1:1 regnum<->pnum table. */
250 rs->regs = GDBARCH_OBSTACK_CALLOC (gdbarch, NUM_REGS + NUM_PSEUDO_REGS,
252 for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++)
254 struct packet_reg *r = &rs->regs[regnum];
257 r->offset = DEPRECATED_REGISTER_BYTE (regnum);
258 r->in_g_packet = (regnum < NUM_REGS);
259 /* ...name = REGISTER_NAME (regnum); */
261 /* Compute packet size by accumulating the size of all registers. */
262 if (regnum < NUM_REGS)
263 rs->sizeof_g_packet += register_size (current_gdbarch, regnum);
266 /* Default maximum number of characters in a packet body. Many
267 remote stubs have a hardwired buffer size of 400 bytes
268 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
269 as the maximum packet-size to ensure that the packet and an extra
270 NUL character can always fit in the buffer. This stops GDB
271 trashing stubs that try to squeeze an extra NUL into what is
272 already a full buffer (As of 1999-12-04 that was most stubs. */
273 rs->remote_packet_size = 400 - 1;
275 /* Should rs->sizeof_g_packet needs more space than the
276 default, adjust the size accordingly. Remember that each byte is
277 encoded as two characters. 32 is the overhead for the packet
278 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
279 (``$NN:G...#NN'') is a better guess, the below has been padded a
281 if (rs->sizeof_g_packet > ((rs->remote_packet_size - 32) / 2))
282 rs->remote_packet_size = (rs->sizeof_g_packet * 2 + 32);
284 /* This one is filled in when a ``g'' packet is received. */
285 rs->actual_register_packet_size = 0;
290 static struct packet_reg *
291 packet_reg_from_regnum (struct remote_state *rs, long regnum)
293 if (regnum < 0 && regnum >= NUM_REGS + NUM_PSEUDO_REGS)
297 struct packet_reg *r = &rs->regs[regnum];
298 gdb_assert (r->regnum == regnum);
303 static struct packet_reg *
304 packet_reg_from_pnum (struct remote_state *rs, LONGEST pnum)
307 for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++)
309 struct packet_reg *r = &rs->regs[i];
316 /* FIXME: graces/2002-08-08: These variables should eventually be
317 bound to an instance of the target object (as in gdbarch-tdep()),
318 when such a thing exists. */
320 /* This is set to the data address of the access causing the target
321 to stop for a watchpoint. */
322 static CORE_ADDR remote_watch_data_address;
324 /* This is non-zero if taregt stopped for a watchpoint. */
325 static int remote_stopped_by_watchpoint_p;
328 static struct target_ops remote_ops;
330 static struct target_ops extended_remote_ops;
332 /* Temporary target ops. Just like the remote_ops and
333 extended_remote_ops, but with asynchronous support. */
334 static struct target_ops remote_async_ops;
336 static struct target_ops extended_async_remote_ops;
338 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
339 ``forever'' still use the normal timeout mechanism. This is
340 currently used by the ASYNC code to guarentee that target reads
341 during the initial connect always time-out. Once getpkt has been
342 modified to return a timeout indication and, in turn
343 remote_wait()/wait_for_inferior() have gained a timeout parameter
345 static int wait_forever_enabled_p = 1;
348 /* This variable chooses whether to send a ^C or a break when the user
349 requests program interruption. Although ^C is usually what remote
350 systems expect, and that is the default here, sometimes a break is
351 preferable instead. */
353 static int remote_break;
355 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
356 remote_open knows that we don't have a file open when the program
358 static struct serial *remote_desc = NULL;
360 /* This variable sets the number of bits in an address that are to be
361 sent in a memory ("M" or "m") packet. Normally, after stripping
362 leading zeros, the entire address would be sent. This variable
363 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
364 initial implementation of remote.c restricted the address sent in
365 memory packets to ``host::sizeof long'' bytes - (typically 32
366 bits). Consequently, for 64 bit targets, the upper 32 bits of an
367 address was never sent. Since fixing this bug may cause a break in
368 some remote targets this variable is principly provided to
369 facilitate backward compatibility. */
371 static int remote_address_size;
373 /* Tempoary to track who currently owns the terminal. See
374 target_async_terminal_* for more details. */
376 static int remote_async_terminal_ours_p;
379 /* User configurable variables for the number of characters in a
380 memory read/write packet. MIN (rs->remote_packet_size,
381 rs->sizeof_g_packet) is the default. Some targets need smaller
382 values (fifo overruns, et.al.) and some users need larger values
383 (speed up transfers). The variables ``preferred_*'' (the user
384 request), ``current_*'' (what was actually set) and ``forced_*''
385 (Positive - a soft limit, negative - a hard limit). */
387 struct memory_packet_config
394 /* Compute the current size of a read/write packet. Since this makes
395 use of ``actual_register_packet_size'' the computation is dynamic. */
398 get_memory_packet_size (struct memory_packet_config *config)
400 struct remote_state *rs = get_remote_state ();
401 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
402 law?) that some hosts don't cope very well with large alloca()
403 calls. Eventually the alloca() code will be replaced by calls to
404 xmalloc() and make_cleanups() allowing this restriction to either
405 be lifted or removed. */
406 #ifndef MAX_REMOTE_PACKET_SIZE
407 #define MAX_REMOTE_PACKET_SIZE 16384
409 /* NOTE: 20 ensures we can write at least one byte. */
410 #ifndef MIN_REMOTE_PACKET_SIZE
411 #define MIN_REMOTE_PACKET_SIZE 20
416 if (config->size <= 0)
417 what_they_get = MAX_REMOTE_PACKET_SIZE;
419 what_they_get = config->size;
423 what_they_get = rs->remote_packet_size;
424 /* Limit the packet to the size specified by the user. */
426 && what_they_get > config->size)
427 what_they_get = config->size;
428 /* Limit it to the size of the targets ``g'' response. */
429 if ((rs->actual_register_packet_size) > 0
430 && what_they_get > (rs->actual_register_packet_size))
431 what_they_get = (rs->actual_register_packet_size);
433 if (what_they_get > MAX_REMOTE_PACKET_SIZE)
434 what_they_get = MAX_REMOTE_PACKET_SIZE;
435 if (what_they_get < MIN_REMOTE_PACKET_SIZE)
436 what_they_get = MIN_REMOTE_PACKET_SIZE;
437 return what_they_get;
440 /* Update the size of a read/write packet. If they user wants
441 something really big then do a sanity check. */
444 set_memory_packet_size (char *args, struct memory_packet_config *config)
446 int fixed_p = config->fixed_p;
447 long size = config->size;
449 error (_("Argument required (integer, `fixed' or `limited')."));
450 else if (strcmp (args, "hard") == 0
451 || strcmp (args, "fixed") == 0)
453 else if (strcmp (args, "soft") == 0
454 || strcmp (args, "limit") == 0)
459 size = strtoul (args, &end, 0);
461 error (_("Invalid %s (bad syntax)."), config->name);
463 /* Instead of explicitly capping the size of a packet to
464 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
465 instead allowed to set the size to something arbitrarily
467 if (size > MAX_REMOTE_PACKET_SIZE)
468 error (_("Invalid %s (too large)."), config->name);
472 if (fixed_p && !config->fixed_p)
474 if (! query (_("The target may not be able to correctly handle a %s\n"
475 "of %ld bytes. Change the packet size? "),
477 error (_("Packet size not changed."));
479 /* Update the config. */
480 config->fixed_p = fixed_p;
485 show_memory_packet_size (struct memory_packet_config *config)
487 printf_filtered (_("The %s is %ld. "), config->name, config->size);
489 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
490 get_memory_packet_size (config));
492 printf_filtered (_("Packets are limited to %ld bytes.\n"),
493 get_memory_packet_size (config));
496 static struct memory_packet_config memory_write_packet_config =
498 "memory-write-packet-size",
502 set_memory_write_packet_size (char *args, int from_tty)
504 set_memory_packet_size (args, &memory_write_packet_config);
508 show_memory_write_packet_size (char *args, int from_tty)
510 show_memory_packet_size (&memory_write_packet_config);
514 get_memory_write_packet_size (void)
516 return get_memory_packet_size (&memory_write_packet_config);
519 static struct memory_packet_config memory_read_packet_config =
521 "memory-read-packet-size",
525 set_memory_read_packet_size (char *args, int from_tty)
527 set_memory_packet_size (args, &memory_read_packet_config);
531 show_memory_read_packet_size (char *args, int from_tty)
533 show_memory_packet_size (&memory_read_packet_config);
537 get_memory_read_packet_size (void)
539 struct remote_state *rs = get_remote_state ();
540 long size = get_memory_packet_size (&memory_read_packet_config);
541 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
542 extra buffer size argument before the memory read size can be
543 increased beyond RS->remote_packet_size. */
544 if (size > rs->remote_packet_size)
545 size = rs->remote_packet_size;
550 /* Generic configuration support for packets the stub optionally
551 supports. Allows the user to specify the use of the packet as well
552 as allowing GDB to auto-detect support in the remote stub. */
556 PACKET_SUPPORT_UNKNOWN = 0,
565 enum auto_boolean detect;
566 enum packet_support support;
569 /* Analyze a packet's return value and update the packet config
580 update_packet_config (struct packet_config *config)
582 switch (config->detect)
584 case AUTO_BOOLEAN_TRUE:
585 config->support = PACKET_ENABLE;
587 case AUTO_BOOLEAN_FALSE:
588 config->support = PACKET_DISABLE;
590 case AUTO_BOOLEAN_AUTO:
591 config->support = PACKET_SUPPORT_UNKNOWN;
597 show_packet_config_cmd (struct packet_config *config)
599 char *support = "internal-error";
600 switch (config->support)
606 support = "disabled";
608 case PACKET_SUPPORT_UNKNOWN:
612 switch (config->detect)
614 case AUTO_BOOLEAN_AUTO:
615 printf_filtered (_("Support for remote protocol `%s' (%s) packet is auto-detected, currently %s.\n"),
616 config->name, config->title, support);
618 case AUTO_BOOLEAN_TRUE:
619 case AUTO_BOOLEAN_FALSE:
620 printf_filtered (_("Support for remote protocol `%s' (%s) packet is currently %s.\n"),
621 config->name, config->title, support);
627 add_packet_config_cmd (struct packet_config *config,
630 cmd_sfunc_ftype *set_func,
631 show_value_ftype *show_func,
632 struct cmd_list_element **set_remote_list,
633 struct cmd_list_element **show_remote_list,
641 config->title = title;
642 config->detect = AUTO_BOOLEAN_AUTO;
643 config->support = PACKET_SUPPORT_UNKNOWN;
644 set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet",
646 show_doc = xstrprintf ("Show current use of remote protocol `%s' (%s) packet",
648 /* set/show TITLE-packet {auto,on,off} */
649 cmd_name = xstrprintf ("%s-packet", title);
650 add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
651 &config->detect, set_doc, show_doc, NULL, /* help_doc */
653 set_remote_list, show_remote_list);
654 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
658 legacy_name = xstrprintf ("%s-packet", name);
659 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
661 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
666 static enum packet_result
667 packet_ok (const char *buf, struct packet_config *config)
671 /* The stub recognized the packet request. Check that the
672 operation succeeded. */
673 switch (config->support)
675 case PACKET_SUPPORT_UNKNOWN:
677 fprintf_unfiltered (gdb_stdlog,
678 "Packet %s (%s) is supported\n",
679 config->name, config->title);
680 config->support = PACKET_ENABLE;
683 internal_error (__FILE__, __LINE__,
684 _("packet_ok: attempt to use a disabled packet"));
689 if (buf[0] == 'O' && buf[1] == 'K' && buf[2] == '\0')
690 /* "OK" - definitly OK. */
693 && isxdigit (buf[1]) && isxdigit (buf[2])
695 /* "Enn" - definitly an error. */
697 /* The packet may or may not be OK. Just assume it is. */
702 /* The stub does not support the packet. */
703 switch (config->support)
706 if (config->detect == AUTO_BOOLEAN_AUTO)
707 /* If the stub previously indicated that the packet was
708 supported then there is a protocol error.. */
709 error (_("Protocol error: %s (%s) conflicting enabled responses."),
710 config->name, config->title);
712 /* The user set it wrong. */
713 error (_("Enabled packet %s (%s) not recognized by stub"),
714 config->name, config->title);
716 case PACKET_SUPPORT_UNKNOWN:
718 fprintf_unfiltered (gdb_stdlog,
719 "Packet %s (%s) is NOT supported\n",
720 config->name, config->title);
721 config->support = PACKET_DISABLE;
726 return PACKET_UNKNOWN;
730 /* Should we try the 'vCont' (descriptive resume) request? */
731 static struct packet_config remote_protocol_vcont;
734 set_remote_protocol_vcont_packet_cmd (char *args, int from_tty,
735 struct cmd_list_element *c)
737 update_packet_config (&remote_protocol_vcont);
741 show_remote_protocol_vcont_packet_cmd (struct ui_file *file, int from_tty,
742 struct cmd_list_element *c,
745 show_packet_config_cmd (&remote_protocol_vcont);
748 /* Should we try the 'qSymbol' (target symbol lookup service) request? */
749 static struct packet_config remote_protocol_qSymbol;
752 set_remote_protocol_qSymbol_packet_cmd (char *args, int from_tty,
753 struct cmd_list_element *c)
755 update_packet_config (&remote_protocol_qSymbol);
759 show_remote_protocol_qSymbol_packet_cmd (struct ui_file *file, int from_tty,
760 struct cmd_list_element *c,
763 show_packet_config_cmd (&remote_protocol_qSymbol);
766 /* Should we try the 'P' (set register) request? */
768 static struct packet_config remote_protocol_P;
771 set_remote_protocol_P_packet_cmd (char *args, int from_tty,
772 struct cmd_list_element *c)
774 update_packet_config (&remote_protocol_P);
778 show_remote_protocol_P_packet_cmd (struct ui_file *file, int from_tty,
779 struct cmd_list_element *c,
782 show_packet_config_cmd (&remote_protocol_P);
785 /* Should we try one of the 'Z' requests? */
789 Z_PACKET_SOFTWARE_BP,
790 Z_PACKET_HARDWARE_BP,
797 static struct packet_config remote_protocol_Z[NR_Z_PACKET_TYPES];
799 /* FIXME: Instead of having all these boiler plate functions, the
800 command callback should include a context argument. */
803 set_remote_protocol_Z_software_bp_packet_cmd (char *args, int from_tty,
804 struct cmd_list_element *c)
806 update_packet_config (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP]);
810 show_remote_protocol_Z_software_bp_packet_cmd (struct ui_file *file, int from_tty,
811 struct cmd_list_element *c,
814 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP]);
818 set_remote_protocol_Z_hardware_bp_packet_cmd (char *args, int from_tty,
819 struct cmd_list_element *c)
821 update_packet_config (&remote_protocol_Z[Z_PACKET_HARDWARE_BP]);
825 show_remote_protocol_Z_hardware_bp_packet_cmd (struct ui_file *file, int from_tty,
826 struct cmd_list_element *c,
829 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_HARDWARE_BP]);
833 set_remote_protocol_Z_write_wp_packet_cmd (char *args, int from_tty,
834 struct cmd_list_element *c)
836 update_packet_config (&remote_protocol_Z[Z_PACKET_WRITE_WP]);
840 show_remote_protocol_Z_write_wp_packet_cmd (struct ui_file *file, int from_tty,
841 struct cmd_list_element *c,
844 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_WRITE_WP]);
848 set_remote_protocol_Z_read_wp_packet_cmd (char *args, int from_tty,
849 struct cmd_list_element *c)
851 update_packet_config (&remote_protocol_Z[Z_PACKET_READ_WP]);
855 show_remote_protocol_Z_read_wp_packet_cmd (struct ui_file *file, int from_tty,
856 struct cmd_list_element *c,
859 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_READ_WP]);
863 set_remote_protocol_Z_access_wp_packet_cmd (char *args, int from_tty,
864 struct cmd_list_element *c)
866 update_packet_config (&remote_protocol_Z[Z_PACKET_ACCESS_WP]);
870 show_remote_protocol_Z_access_wp_packet_cmd (struct ui_file *file, int from_tty,
871 struct cmd_list_element *c,
874 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_ACCESS_WP]);
877 /* For compatibility with older distributions. Provide a ``set remote
878 Z-packet ...'' command that updates all the Z packet types. */
880 static enum auto_boolean remote_Z_packet_detect;
883 set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
884 struct cmd_list_element *c)
887 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
889 remote_protocol_Z[i].detect = remote_Z_packet_detect;
890 update_packet_config (&remote_protocol_Z[i]);
895 show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty,
896 struct cmd_list_element *c,
900 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
902 show_packet_config_cmd (&remote_protocol_Z[i]);
906 /* Should we try the 'X' (remote binary download) packet?
908 This variable (available to the user via "set remote X-packet")
909 dictates whether downloads are sent in binary (via the 'X' packet).
910 We assume that the stub can, and attempt to do it. This will be
911 cleared if the stub does not understand it. This switch is still
912 needed, though in cases when the packet is supported in the stub,
913 but the connection does not allow it (i.e., 7-bit serial connection
916 static struct packet_config remote_protocol_binary_download;
918 /* Should we try the 'ThreadInfo' query packet?
920 This variable (NOT available to the user: auto-detect only!)
921 determines whether GDB will use the new, simpler "ThreadInfo"
922 query or the older, more complex syntax for thread queries.
923 This is an auto-detect variable (set to true at each connect,
924 and set to false when the target fails to recognize it). */
926 static int use_threadinfo_query;
927 static int use_threadextra_query;
930 set_remote_protocol_binary_download_cmd (char *args,
932 struct cmd_list_element *c)
934 update_packet_config (&remote_protocol_binary_download);
938 show_remote_protocol_binary_download_cmd (struct ui_file *file, int from_tty,
939 struct cmd_list_element *c,
942 show_packet_config_cmd (&remote_protocol_binary_download);
945 /* Should we try the 'qPart:auxv' (target auxiliary vector read) request? */
946 static struct packet_config remote_protocol_qPart_auxv;
949 set_remote_protocol_qPart_auxv_packet_cmd (char *args, int from_tty,
950 struct cmd_list_element *c)
952 update_packet_config (&remote_protocol_qPart_auxv);
956 show_remote_protocol_qPart_auxv_packet_cmd (struct ui_file *file, int from_tty,
957 struct cmd_list_element *c,
960 show_packet_config_cmd (&remote_protocol_qPart_auxv);
963 /* Should we try the 'qGetTLSAddr' (Get Thread Local Storage Address) request? */
964 static struct packet_config remote_protocol_qGetTLSAddr;
967 set_remote_protocol_qGetTLSAddr_packet_cmd (char *args, int from_tty,
968 struct cmd_list_element *c)
970 update_packet_config (&remote_protocol_qGetTLSAddr);
974 show_remote_protocol_qGetTLSAddr_packet_cmd (struct ui_file *file, int from_tty,
975 struct cmd_list_element *c,
978 show_packet_config_cmd (&remote_protocol_qGetTLSAddr);
981 static struct packet_config remote_protocol_p;
984 set_remote_protocol_p_packet_cmd (char *args, int from_tty,
985 struct cmd_list_element *c)
987 update_packet_config (&remote_protocol_p);
991 show_remote_protocol_p_packet_cmd (struct ui_file *file, int from_tty,
992 struct cmd_list_element *c,
995 show_packet_config_cmd (&remote_protocol_p);
1000 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1001 static void *sigint_remote_twice_token;
1002 static void *sigint_remote_token;
1004 /* These are pointers to hook functions that may be set in order to
1005 modify resume/wait behavior for a particular architecture. */
1007 void (*deprecated_target_resume_hook) (void);
1008 void (*deprecated_target_wait_loop_hook) (void);
1012 /* These are the threads which we last sent to the remote system.
1013 -1 for all or -2 for not sent yet. */
1014 static int general_thread;
1015 static int continue_thread;
1017 /* Call this function as a result of
1018 1) A halt indication (T packet) containing a thread id
1019 2) A direct query of currthread
1020 3) Successful execution of set thread
1024 record_currthread (int currthread)
1026 general_thread = currthread;
1028 /* If this is a new thread, add it to GDB's thread list.
1029 If we leave it up to WFI to do this, bad things will happen. */
1030 if (!in_thread_list (pid_to_ptid (currthread)))
1032 add_thread (pid_to_ptid (currthread));
1033 ui_out_text (uiout, "[New ");
1034 ui_out_text (uiout, target_pid_to_str (pid_to_ptid (currthread)));
1035 ui_out_text (uiout, "]\n");
1039 #define MAGIC_NULL_PID 42000
1042 set_thread (int th, int gen)
1044 struct remote_state *rs = get_remote_state ();
1045 char *buf = alloca (rs->remote_packet_size);
1046 int state = gen ? general_thread : continue_thread;
1052 buf[1] = gen ? 'g' : 'c';
1053 if (th == MAGIC_NULL_PID)
1059 xsnprintf (&buf[2], rs->remote_packet_size - 2, "-%x", -th);
1061 xsnprintf (&buf[2], rs->remote_packet_size - 2, "%x", th);
1063 getpkt (buf, rs->remote_packet_size, 0);
1065 general_thread = th;
1067 continue_thread = th;
1070 /* Return nonzero if the thread TH is still alive on the remote system. */
1073 remote_thread_alive (ptid_t ptid)
1075 int tid = PIDGET (ptid);
1079 xsnprintf (buf, sizeof (buf), "T-%08x", -tid);
1081 xsnprintf (buf, sizeof (buf), "T%08x", tid);
1083 getpkt (buf, sizeof (buf), 0);
1084 return (buf[0] == 'O' && buf[1] == 'K');
1087 /* About these extended threadlist and threadinfo packets. They are
1088 variable length packets but, the fields within them are often fixed
1089 length. They are redundent enough to send over UDP as is the
1090 remote protocol in general. There is a matching unit test module
1093 #define OPAQUETHREADBYTES 8
1095 /* a 64 bit opaque identifier */
1096 typedef unsigned char threadref[OPAQUETHREADBYTES];
1098 /* WARNING: This threadref data structure comes from the remote O.S.,
1099 libstub protocol encoding, and remote.c. it is not particularly
1102 /* Right now, the internal structure is int. We want it to be bigger.
1106 typedef int gdb_threadref; /* Internal GDB thread reference. */
1108 /* gdb_ext_thread_info is an internal GDB data structure which is
1109 equivalint to the reply of the remote threadinfo packet. */
1111 struct gdb_ext_thread_info
1113 threadref threadid; /* External form of thread reference. */
1114 int active; /* Has state interesting to GDB?
1116 char display[256]; /* Brief state display, name,
1117 blocked/suspended. */
1118 char shortname[32]; /* To be used to name threads. */
1119 char more_display[256]; /* Long info, statistics, queue depth,
1123 /* The volume of remote transfers can be limited by submitting
1124 a mask containing bits specifying the desired information.
1125 Use a union of these values as the 'selection' parameter to
1126 get_thread_info. FIXME: Make these TAG names more thread specific.
1129 #define TAG_THREADID 1
1130 #define TAG_EXISTS 2
1131 #define TAG_DISPLAY 4
1132 #define TAG_THREADNAME 8
1133 #define TAG_MOREDISPLAY 16
1135 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1137 char *unpack_varlen_hex (char *buff, ULONGEST *result);
1139 static char *unpack_nibble (char *buf, int *val);
1141 static char *pack_nibble (char *buf, int nibble);
1143 static char *pack_hex_byte (char *pkt, int /* unsigned char */ byte);
1145 static char *unpack_byte (char *buf, int *value);
1147 static char *pack_int (char *buf, int value);
1149 static char *unpack_int (char *buf, int *value);
1151 static char *unpack_string (char *src, char *dest, int length);
1153 static char *pack_threadid (char *pkt, threadref *id);
1155 static char *unpack_threadid (char *inbuf, threadref *id);
1157 void int_to_threadref (threadref *id, int value);
1159 static int threadref_to_int (threadref *ref);
1161 static void copy_threadref (threadref *dest, threadref *src);
1163 static int threadmatch (threadref *dest, threadref *src);
1165 static char *pack_threadinfo_request (char *pkt, int mode,
1168 static int remote_unpack_thread_info_response (char *pkt,
1169 threadref *expectedref,
1170 struct gdb_ext_thread_info
1174 static int remote_get_threadinfo (threadref *threadid,
1175 int fieldset, /*TAG mask */
1176 struct gdb_ext_thread_info *info);
1178 static char *pack_threadlist_request (char *pkt, int startflag,
1180 threadref *nextthread);
1182 static int parse_threadlist_response (char *pkt,
1184 threadref *original_echo,
1185 threadref *resultlist,
1188 static int remote_get_threadlist (int startflag,
1189 threadref *nextthread,
1193 threadref *threadlist);
1195 typedef int (*rmt_thread_action) (threadref *ref, void *context);
1197 static int remote_threadlist_iterator (rmt_thread_action stepfunction,
1198 void *context, int looplimit);
1200 static int remote_newthread_step (threadref *ref, void *context);
1202 /* Encode 64 bits in 16 chars of hex. */
1204 static const char hexchars[] = "0123456789abcdef";
1207 ishex (int ch, int *val)
1209 if ((ch >= 'a') && (ch <= 'f'))
1211 *val = ch - 'a' + 10;
1214 if ((ch >= 'A') && (ch <= 'F'))
1216 *val = ch - 'A' + 10;
1219 if ((ch >= '0') && (ch <= '9'))
1230 if (ch >= 'a' && ch <= 'f')
1231 return ch - 'a' + 10;
1232 if (ch >= '0' && ch <= '9')
1234 if (ch >= 'A' && ch <= 'F')
1235 return ch - 'A' + 10;
1240 stub_unpack_int (char *buff, int fieldlength)
1247 nibble = stubhex (*buff++);
1251 retval = retval << 4;
1257 unpack_varlen_hex (char *buff, /* packet to parse */
1263 while (ishex (*buff, &nibble))
1266 retval = retval << 4;
1267 retval |= nibble & 0x0f;
1274 unpack_nibble (char *buf, int *val)
1276 ishex (*buf++, val);
1281 pack_nibble (char *buf, int nibble)
1283 *buf++ = hexchars[(nibble & 0x0f)];
1288 pack_hex_byte (char *pkt, int byte)
1290 *pkt++ = hexchars[(byte >> 4) & 0xf];
1291 *pkt++ = hexchars[(byte & 0xf)];
1296 unpack_byte (char *buf, int *value)
1298 *value = stub_unpack_int (buf, 2);
1303 pack_int (char *buf, int value)
1305 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
1306 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
1307 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
1308 buf = pack_hex_byte (buf, (value & 0xff));
1313 unpack_int (char *buf, int *value)
1315 *value = stub_unpack_int (buf, 8);
1319 #if 0 /* Currently unused, uncomment when needed. */
1320 static char *pack_string (char *pkt, char *string);
1323 pack_string (char *pkt, char *string)
1328 len = strlen (string);
1330 len = 200; /* Bigger than most GDB packets, junk??? */
1331 pkt = pack_hex_byte (pkt, len);
1335 if ((ch == '\0') || (ch == '#'))
1336 ch = '*'; /* Protect encapsulation. */
1341 #endif /* 0 (unused) */
1344 unpack_string (char *src, char *dest, int length)
1353 pack_threadid (char *pkt, threadref *id)
1356 unsigned char *altid;
1358 altid = (unsigned char *) id;
1359 limit = pkt + BUF_THREAD_ID_SIZE;
1361 pkt = pack_hex_byte (pkt, *altid++);
1367 unpack_threadid (char *inbuf, threadref *id)
1370 char *limit = inbuf + BUF_THREAD_ID_SIZE;
1373 altref = (char *) id;
1375 while (inbuf < limit)
1377 x = stubhex (*inbuf++);
1378 y = stubhex (*inbuf++);
1379 *altref++ = (x << 4) | y;
1384 /* Externally, threadrefs are 64 bits but internally, they are still
1385 ints. This is due to a mismatch of specifications. We would like
1386 to use 64bit thread references internally. This is an adapter
1390 int_to_threadref (threadref *id, int value)
1392 unsigned char *scan;
1394 scan = (unsigned char *) id;
1400 *scan++ = (value >> 24) & 0xff;
1401 *scan++ = (value >> 16) & 0xff;
1402 *scan++ = (value >> 8) & 0xff;
1403 *scan++ = (value & 0xff);
1407 threadref_to_int (threadref *ref)
1410 unsigned char *scan;
1416 value = (value << 8) | ((*scan++) & 0xff);
1421 copy_threadref (threadref *dest, threadref *src)
1424 unsigned char *csrc, *cdest;
1426 csrc = (unsigned char *) src;
1427 cdest = (unsigned char *) dest;
1434 threadmatch (threadref *dest, threadref *src)
1436 /* Things are broken right now, so just assume we got a match. */
1438 unsigned char *srcp, *destp;
1440 srcp = (char *) src;
1441 destp = (char *) dest;
1445 result &= (*srcp++ == *destp++) ? 1 : 0;
1452 threadid:1, # always request threadid
1459 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1462 pack_threadinfo_request (char *pkt, int mode, threadref *id)
1464 *pkt++ = 'q'; /* Info Query */
1465 *pkt++ = 'P'; /* process or thread info */
1466 pkt = pack_int (pkt, mode); /* mode */
1467 pkt = pack_threadid (pkt, id); /* threadid */
1468 *pkt = '\0'; /* terminate */
1472 /* These values tag the fields in a thread info response packet. */
1473 /* Tagging the fields allows us to request specific fields and to
1474 add more fields as time goes by. */
1476 #define TAG_THREADID 1 /* Echo the thread identifier. */
1477 #define TAG_EXISTS 2 /* Is this process defined enough to
1478 fetch registers and its stack? */
1479 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1480 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
1481 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1485 remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
1486 struct gdb_ext_thread_info *info)
1488 struct remote_state *rs = get_remote_state ();
1492 char *limit = pkt + rs->remote_packet_size; /* Plausible parsing limit. */
1495 /* info->threadid = 0; FIXME: implement zero_threadref. */
1497 info->display[0] = '\0';
1498 info->shortname[0] = '\0';
1499 info->more_display[0] = '\0';
1501 /* Assume the characters indicating the packet type have been
1503 pkt = unpack_int (pkt, &mask); /* arg mask */
1504 pkt = unpack_threadid (pkt, &ref);
1507 warning (_("Incomplete response to threadinfo request."));
1508 if (!threadmatch (&ref, expectedref))
1509 { /* This is an answer to a different request. */
1510 warning (_("ERROR RMT Thread info mismatch."));
1513 copy_threadref (&info->threadid, &ref);
1515 /* Loop on tagged fields , try to bail if somthing goes wrong. */
1517 /* Packets are terminated with nulls. */
1518 while ((pkt < limit) && mask && *pkt)
1520 pkt = unpack_int (pkt, &tag); /* tag */
1521 pkt = unpack_byte (pkt, &length); /* length */
1522 if (!(tag & mask)) /* Tags out of synch with mask. */
1524 warning (_("ERROR RMT: threadinfo tag mismatch."));
1528 if (tag == TAG_THREADID)
1532 warning (_("ERROR RMT: length of threadid is not 16."));
1536 pkt = unpack_threadid (pkt, &ref);
1537 mask = mask & ~TAG_THREADID;
1540 if (tag == TAG_EXISTS)
1542 info->active = stub_unpack_int (pkt, length);
1544 mask = mask & ~(TAG_EXISTS);
1547 warning (_("ERROR RMT: 'exists' length too long."));
1553 if (tag == TAG_THREADNAME)
1555 pkt = unpack_string (pkt, &info->shortname[0], length);
1556 mask = mask & ~TAG_THREADNAME;
1559 if (tag == TAG_DISPLAY)
1561 pkt = unpack_string (pkt, &info->display[0], length);
1562 mask = mask & ~TAG_DISPLAY;
1565 if (tag == TAG_MOREDISPLAY)
1567 pkt = unpack_string (pkt, &info->more_display[0], length);
1568 mask = mask & ~TAG_MOREDISPLAY;
1571 warning (_("ERROR RMT: unknown thread info tag."));
1572 break; /* Not a tag we know about. */
1578 remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
1579 struct gdb_ext_thread_info *info)
1581 struct remote_state *rs = get_remote_state ();
1583 char *threadinfo_pkt = alloca (rs->remote_packet_size);
1585 pack_threadinfo_request (threadinfo_pkt, fieldset, threadid);
1586 putpkt (threadinfo_pkt);
1587 getpkt (threadinfo_pkt, rs->remote_packet_size, 0);
1588 result = remote_unpack_thread_info_response (threadinfo_pkt + 2,
1593 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1596 pack_threadlist_request (char *pkt, int startflag, int threadcount,
1597 threadref *nextthread)
1599 *pkt++ = 'q'; /* info query packet */
1600 *pkt++ = 'L'; /* Process LIST or threadLIST request */
1601 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
1602 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
1603 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
1608 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1611 parse_threadlist_response (char *pkt, int result_limit,
1612 threadref *original_echo, threadref *resultlist,
1615 struct remote_state *rs = get_remote_state ();
1617 int count, resultcount, done;
1620 /* Assume the 'q' and 'M chars have been stripped. */
1621 limit = pkt + (rs->remote_packet_size - BUF_THREAD_ID_SIZE);
1622 /* done parse past here */
1623 pkt = unpack_byte (pkt, &count); /* count field */
1624 pkt = unpack_nibble (pkt, &done);
1625 /* The first threadid is the argument threadid. */
1626 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
1627 while ((count-- > 0) && (pkt < limit))
1629 pkt = unpack_threadid (pkt, resultlist++);
1630 if (resultcount++ >= result_limit)
1639 remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
1640 int *done, int *result_count, threadref *threadlist)
1642 struct remote_state *rs = get_remote_state ();
1643 static threadref echo_nextthread;
1644 char *threadlist_packet = alloca (rs->remote_packet_size);
1645 char *t_response = alloca (rs->remote_packet_size);
1648 /* Trancate result limit to be smaller than the packet size. */
1649 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= rs->remote_packet_size)
1650 result_limit = (rs->remote_packet_size / BUF_THREAD_ID_SIZE) - 2;
1652 pack_threadlist_request (threadlist_packet,
1653 startflag, result_limit, nextthread);
1654 putpkt (threadlist_packet);
1655 getpkt (t_response, rs->remote_packet_size, 0);
1658 parse_threadlist_response (t_response + 2, result_limit, &echo_nextthread,
1661 if (!threadmatch (&echo_nextthread, nextthread))
1663 /* FIXME: This is a good reason to drop the packet. */
1664 /* Possably, there is a duplicate response. */
1666 retransmit immediatly - race conditions
1667 retransmit after timeout - yes
1669 wait for packet, then exit
1671 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
1672 return 0; /* I choose simply exiting. */
1674 if (*result_count <= 0)
1678 warning (_("RMT ERROR : failed to get remote thread list."));
1681 return result; /* break; */
1683 if (*result_count > result_limit)
1686 warning (_("RMT ERROR: threadlist response longer than requested."));
1692 /* This is the interface between remote and threads, remotes upper
1695 /* remote_find_new_threads retrieves the thread list and for each
1696 thread in the list, looks up the thread in GDB's internal list,
1697 ading the thread if it does not already exist. This involves
1698 getting partial thread lists from the remote target so, polling the
1699 quit_flag is required. */
1702 /* About this many threadisds fit in a packet. */
1704 #define MAXTHREADLISTRESULTS 32
1707 remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
1710 int done, i, result_count;
1714 static threadref nextthread;
1715 static threadref resultthreadlist[MAXTHREADLISTRESULTS];
1720 if (loopcount++ > looplimit)
1723 warning (_("Remote fetch threadlist -infinite loop-."));
1726 if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS,
1727 &done, &result_count, resultthreadlist))
1732 /* Clear for later iterations. */
1734 /* Setup to resume next batch of thread references, set nextthread. */
1735 if (result_count >= 1)
1736 copy_threadref (&nextthread, &resultthreadlist[result_count - 1]);
1738 while (result_count--)
1739 if (!(result = (*stepfunction) (&resultthreadlist[i++], context)))
1746 remote_newthread_step (threadref *ref, void *context)
1750 ptid = pid_to_ptid (threadref_to_int (ref));
1752 if (!in_thread_list (ptid))
1754 return 1; /* continue iterator */
1757 #define CRAZY_MAX_THREADS 1000
1760 remote_current_thread (ptid_t oldpid)
1762 struct remote_state *rs = get_remote_state ();
1763 char *buf = alloca (rs->remote_packet_size);
1766 getpkt (buf, rs->remote_packet_size, 0);
1767 if (buf[0] == 'Q' && buf[1] == 'C')
1768 /* Use strtoul here, so we'll correctly parse values whose highest
1769 bit is set. The protocol carries them as a simple series of
1770 hex digits; in the absence of a sign, strtol will see such
1771 values as positive numbers out of range for signed 'long', and
1772 return LONG_MAX to indicate an overflow. */
1773 return pid_to_ptid (strtoul (&buf[2], NULL, 16));
1778 /* Find new threads for info threads command.
1779 * Original version, using John Metzler's thread protocol.
1783 remote_find_new_threads (void)
1785 remote_threadlist_iterator (remote_newthread_step, 0,
1787 if (PIDGET (inferior_ptid) == MAGIC_NULL_PID) /* ack ack ack */
1788 inferior_ptid = remote_current_thread (inferior_ptid);
1792 * Find all threads for info threads command.
1793 * Uses new thread protocol contributed by Cisco.
1794 * Falls back and attempts to use the older method (above)
1795 * if the target doesn't respond to the new method.
1799 remote_threads_info (void)
1801 struct remote_state *rs = get_remote_state ();
1802 char *buf = alloca (rs->remote_packet_size);
1806 if (remote_desc == 0) /* paranoia */
1807 error (_("Command can only be used when connected to the remote target."));
1809 if (use_threadinfo_query)
1811 putpkt ("qfThreadInfo");
1813 getpkt (bufp, rs->remote_packet_size, 0);
1814 if (bufp[0] != '\0') /* q packet recognized */
1816 while (*bufp++ == 'm') /* reply contains one or more TID */
1820 /* Use strtoul here, so we'll correctly parse values
1821 whose highest bit is set. The protocol carries
1822 them as a simple series of hex digits; in the
1823 absence of a sign, strtol will see such values as
1824 positive numbers out of range for signed 'long',
1825 and return LONG_MAX to indicate an overflow. */
1826 tid = strtoul (bufp, &bufp, 16);
1827 if (tid != 0 && !in_thread_list (pid_to_ptid (tid)))
1828 add_thread (pid_to_ptid (tid));
1830 while (*bufp++ == ','); /* comma-separated list */
1831 putpkt ("qsThreadInfo");
1833 getpkt (bufp, rs->remote_packet_size, 0);
1839 /* Else fall back to old method based on jmetzler protocol. */
1840 use_threadinfo_query = 0;
1841 remote_find_new_threads ();
1846 * Collect a descriptive string about the given thread.
1847 * The target may say anything it wants to about the thread
1848 * (typically info about its blocked / runnable state, name, etc.).
1849 * This string will appear in the info threads display.
1851 * Optional: targets are not required to implement this function.
1855 remote_threads_extra_info (struct thread_info *tp)
1857 struct remote_state *rs = get_remote_state ();
1861 struct gdb_ext_thread_info threadinfo;
1862 static char display_buf[100]; /* arbitrary... */
1863 char *bufp = alloca (rs->remote_packet_size);
1864 int n = 0; /* position in display_buf */
1866 if (remote_desc == 0) /* paranoia */
1867 internal_error (__FILE__, __LINE__,
1868 _("remote_threads_extra_info"));
1870 if (use_threadextra_query)
1872 xsnprintf (bufp, rs->remote_packet_size, "qThreadExtraInfo,%x",
1875 getpkt (bufp, rs->remote_packet_size, 0);
1878 n = min (strlen (bufp) / 2, sizeof (display_buf));
1879 result = hex2bin (bufp, (gdb_byte *) display_buf, n);
1880 display_buf [result] = '\0';
1885 /* If the above query fails, fall back to the old method. */
1886 use_threadextra_query = 0;
1887 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
1888 | TAG_MOREDISPLAY | TAG_DISPLAY;
1889 int_to_threadref (&id, PIDGET (tp->ptid));
1890 if (remote_get_threadinfo (&id, set, &threadinfo))
1891 if (threadinfo.active)
1893 if (*threadinfo.shortname)
1894 n += xsnprintf (&display_buf[0], sizeof (display_buf) - n,
1895 " Name: %s,", threadinfo.shortname);
1896 if (*threadinfo.display)
1897 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
1898 " State: %s,", threadinfo.display);
1899 if (*threadinfo.more_display)
1900 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
1901 " Priority: %s", threadinfo.more_display);
1905 /* For purely cosmetic reasons, clear up trailing commas. */
1906 if (',' == display_buf[n-1])
1907 display_buf[n-1] = ' ';
1915 /* Restart the remote side; this is an extended protocol operation. */
1918 extended_remote_restart (void)
1920 struct remote_state *rs = get_remote_state ();
1921 char *buf = alloca (rs->remote_packet_size);
1923 /* Send the restart command; for reasons I don't understand the
1924 remote side really expects a number after the "R". */
1925 xsnprintf (buf, rs->remote_packet_size, "R%x", 0);
1928 /* Now query for status so this looks just like we restarted
1929 gdbserver from scratch. */
1931 getpkt (buf, rs->remote_packet_size, 0);
1934 /* Clean up connection to a remote debugger. */
1937 remote_close (int quitting)
1940 serial_close (remote_desc);
1944 /* Query the remote side for the text, data and bss offsets. */
1949 struct remote_state *rs = get_remote_state ();
1950 char *buf = alloca (rs->remote_packet_size);
1953 CORE_ADDR text_addr, data_addr, bss_addr;
1954 struct section_offsets *offs;
1956 putpkt ("qOffsets");
1957 getpkt (buf, rs->remote_packet_size, 0);
1959 if (buf[0] == '\000')
1960 return; /* Return silently. Stub doesn't support
1964 warning (_("Remote failure reply: %s"), buf);
1968 /* Pick up each field in turn. This used to be done with scanf, but
1969 scanf will make trouble if CORE_ADDR size doesn't match
1970 conversion directives correctly. The following code will work
1971 with any size of CORE_ADDR. */
1972 text_addr = data_addr = bss_addr = 0;
1976 if (strncmp (ptr, "Text=", 5) == 0)
1979 /* Don't use strtol, could lose on big values. */
1980 while (*ptr && *ptr != ';')
1981 text_addr = (text_addr << 4) + fromhex (*ptr++);
1986 if (!lose && strncmp (ptr, ";Data=", 6) == 0)
1989 while (*ptr && *ptr != ';')
1990 data_addr = (data_addr << 4) + fromhex (*ptr++);
1995 if (!lose && strncmp (ptr, ";Bss=", 5) == 0)
1998 while (*ptr && *ptr != ';')
1999 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
2005 error (_("Malformed response to offset query, %s"), buf);
2007 if (symfile_objfile == NULL)
2010 offs = ((struct section_offsets *)
2011 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
2012 memcpy (offs, symfile_objfile->section_offsets,
2013 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
2015 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
2017 /* This is a temporary kludge to force data and bss to use the same offsets
2018 because that's what nlmconv does now. The real solution requires changes
2019 to the stub and remote.c that I don't have time to do right now. */
2021 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
2022 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
2024 objfile_relocate (symfile_objfile, offs);
2027 /* Stub for catch_errors. */
2030 remote_start_remote_dummy (struct ui_out *uiout, void *dummy)
2032 start_remote (); /* Initialize gdb process mechanisms. */
2033 /* NOTE: Return something >=0. A -ve value is reserved for
2034 catch_exceptions. */
2039 remote_start_remote (struct ui_out *uiout, void *dummy)
2041 immediate_quit++; /* Allow user to interrupt it. */
2043 /* Ack any packet which the remote side has already sent. */
2044 serial_write (remote_desc, "+", 1);
2046 /* Let the stub know that we want it to return the thread. */
2049 inferior_ptid = remote_current_thread (inferior_ptid);
2051 get_offsets (); /* Get text, data & bss offsets. */
2053 putpkt ("?"); /* Initiate a query from remote machine. */
2056 remote_start_remote_dummy (uiout, dummy);
2059 /* Open a connection to a remote debugger.
2060 NAME is the filename used for communication. */
2063 remote_open (char *name, int from_tty)
2065 remote_open_1 (name, from_tty, &remote_ops, 0, 0);
2068 /* Just like remote_open, but with asynchronous support. */
2070 remote_async_open (char *name, int from_tty)
2072 remote_open_1 (name, from_tty, &remote_async_ops, 0, 1);
2075 /* Open a connection to a remote debugger using the extended
2076 remote gdb protocol. NAME is the filename used for communication. */
2079 extended_remote_open (char *name, int from_tty)
2081 remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */,
2085 /* Just like extended_remote_open, but with asynchronous support. */
2087 extended_remote_async_open (char *name, int from_tty)
2089 remote_open_1 (name, from_tty, &extended_async_remote_ops,
2090 1 /*extended_p */, 1 /* async_p */);
2093 /* Generic code for opening a connection to a remote target. */
2096 init_all_packet_configs (void)
2099 update_packet_config (&remote_protocol_P);
2100 update_packet_config (&remote_protocol_p);
2101 update_packet_config (&remote_protocol_qSymbol);
2102 update_packet_config (&remote_protocol_vcont);
2103 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
2104 update_packet_config (&remote_protocol_Z[i]);
2105 /* Force remote_write_bytes to check whether target supports binary
2107 update_packet_config (&remote_protocol_binary_download);
2108 update_packet_config (&remote_protocol_qPart_auxv);
2109 update_packet_config (&remote_protocol_qGetTLSAddr);
2112 /* Symbol look-up. */
2115 remote_check_symbols (struct objfile *objfile)
2117 struct remote_state *rs = get_remote_state ();
2118 char *msg, *reply, *tmp;
2119 struct minimal_symbol *sym;
2122 if (remote_protocol_qSymbol.support == PACKET_DISABLE)
2125 msg = alloca (rs->remote_packet_size);
2126 reply = alloca (rs->remote_packet_size);
2128 /* Invite target to request symbol lookups. */
2130 putpkt ("qSymbol::");
2131 getpkt (reply, rs->remote_packet_size, 0);
2132 packet_ok (reply, &remote_protocol_qSymbol);
2134 while (strncmp (reply, "qSymbol:", 8) == 0)
2137 end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2);
2139 sym = lookup_minimal_symbol (msg, NULL, NULL);
2141 xsnprintf (msg, rs->remote_packet_size, "qSymbol::%s", &reply[8]);
2143 xsnprintf (msg, rs->remote_packet_size, "qSymbol:%s:%s",
2144 paddr_nz (SYMBOL_VALUE_ADDRESS (sym)),
2147 getpkt (reply, rs->remote_packet_size, 0);
2151 static struct serial *
2152 remote_serial_open (char *name)
2154 static int udp_warning = 0;
2156 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2157 of in ser-tcp.c, because it is the remote protocol assuming that the
2158 serial connection is reliable and not the serial connection promising
2160 if (!udp_warning && strncmp (name, "udp:", 4) == 0)
2163 The remote protocol may be unreliable over UDP.\n\
2164 Some events may be lost, rendering further debugging impossible."));
2168 return serial_open (name);
2172 remote_open_1 (char *name, int from_tty, struct target_ops *target,
2173 int extended_p, int async_p)
2175 struct remote_state *rs = get_remote_state ();
2177 error (_("To open a remote debug connection, you need to specify what\n"
2178 "serial device is attached to the remote system\n"
2179 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
2181 /* See FIXME above. */
2183 wait_forever_enabled_p = 1;
2185 reopen_exec_file ();
2188 target_preopen (from_tty);
2190 unpush_target (target);
2192 remote_desc = remote_serial_open (name);
2194 perror_with_name (name);
2196 if (baud_rate != -1)
2198 if (serial_setbaudrate (remote_desc, baud_rate))
2200 /* The requested speed could not be set. Error out to
2201 top level after closing remote_desc. Take care to
2202 set remote_desc to NULL to avoid closing remote_desc
2204 serial_close (remote_desc);
2206 perror_with_name (name);
2210 serial_raw (remote_desc);
2212 /* If there is something sitting in the buffer we might take it as a
2213 response to a command, which would be bad. */
2214 serial_flush_input (remote_desc);
2218 puts_filtered ("Remote debugging using ");
2219 puts_filtered (name);
2220 puts_filtered ("\n");
2222 push_target (target); /* Switch to using remote target now. */
2224 init_all_packet_configs ();
2226 general_thread = -2;
2227 continue_thread = -2;
2229 /* Probe for ability to use "ThreadInfo" query, as required. */
2230 use_threadinfo_query = 1;
2231 use_threadextra_query = 1;
2233 /* Without this, some commands which require an active target (such
2234 as kill) won't work. This variable serves (at least) double duty
2235 as both the pid of the target process (if it has such), and as a
2236 flag indicating that a target is active. These functions should
2237 be split out into seperate variables, especially since GDB will
2238 someday have a notion of debugging several processes. */
2240 inferior_ptid = pid_to_ptid (MAGIC_NULL_PID);
2244 /* With this target we start out by owning the terminal. */
2245 remote_async_terminal_ours_p = 1;
2247 /* FIXME: cagney/1999-09-23: During the initial connection it is
2248 assumed that the target is already ready and able to respond to
2249 requests. Unfortunately remote_start_remote() eventually calls
2250 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2251 around this. Eventually a mechanism that allows
2252 wait_for_inferior() to expect/get timeouts will be
2254 wait_forever_enabled_p = 0;
2257 /* First delete any symbols previously loaded from shared libraries. */
2258 no_shared_libraries (NULL, 0);
2260 /* Start the remote connection. If error() or QUIT, discard this
2261 target (we'd otherwise be in an inconsistent state) and then
2262 propogate the error on up the exception chain. This ensures that
2263 the caller doesn't stumble along blindly assuming that the
2264 function succeeded. The CLI doesn't have this problem but other
2265 UI's, such as MI do.
2267 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
2268 this function should return an error indication letting the
2269 caller restore the previous state. Unfortunately the command
2270 ``target remote'' is directly wired to this function making that
2271 impossible. On a positive note, the CLI side of this problem has
2272 been fixed - the function set_cmd_context() makes it possible for
2273 all the ``target ....'' commands to share a common callback
2274 function. See cli-dump.c. */
2276 struct gdb_exception ex
2277 = catch_exception (uiout, remote_start_remote, NULL, RETURN_MASK_ALL);
2282 wait_forever_enabled_p = 1;
2283 throw_exception (ex);
2288 wait_forever_enabled_p = 1;
2292 /* Tell the remote that we are using the extended protocol. */
2293 char *buf = alloca (rs->remote_packet_size);
2295 getpkt (buf, rs->remote_packet_size, 0);
2298 /* FIXME: need a master target_open vector from which all
2299 remote_opens can be called, so that stuff like this can
2300 go there. Failing that, the following code must be copied
2301 to the open function for any remote target that wants to
2302 support svr4 shared libraries. */
2304 /* Set up to detect and load shared libraries. */
2305 if (exec_bfd) /* No use without an exec file. */
2307 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2308 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid));
2310 solib_create_inferior_hook ();
2312 remote_check_symbols (symfile_objfile);
2315 observer_notify_inferior_created (¤t_target, from_tty);
2318 /* This takes a program previously attached to and detaches it. After
2319 this is done, GDB can be used to debug some other program. We
2320 better not have left any breakpoints in the target program or it'll
2321 die when it hits one. */
2324 remote_detach (char *args, int from_tty)
2326 struct remote_state *rs = get_remote_state ();
2327 char *buf = alloca (rs->remote_packet_size);
2330 error (_("Argument given to \"detach\" when remotely debugging."));
2332 /* Tell the remote target to detach. */
2334 remote_send (buf, rs->remote_packet_size);
2336 /* Unregister the file descriptor from the event loop. */
2337 if (target_is_async_p ())
2338 serial_async (remote_desc, NULL, 0);
2340 target_mourn_inferior ();
2342 puts_filtered ("Ending remote debugging.\n");
2345 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
2348 remote_disconnect (char *args, int from_tty)
2351 error (_("Argument given to \"detach\" when remotely debugging."));
2353 /* Unregister the file descriptor from the event loop. */
2354 if (target_is_async_p ())
2355 serial_async (remote_desc, NULL, 0);
2357 target_mourn_inferior ();
2359 puts_filtered ("Ending remote debugging.\n");
2362 /* Convert hex digit A to a number. */
2367 if (a >= '0' && a <= '9')
2369 else if (a >= 'a' && a <= 'f')
2370 return a - 'a' + 10;
2371 else if (a >= 'A' && a <= 'F')
2372 return a - 'A' + 10;
2374 error (_("Reply contains invalid hex digit %d"), a);
2378 hex2bin (const char *hex, gdb_byte *bin, int count)
2382 for (i = 0; i < count; i++)
2384 if (hex[0] == 0 || hex[1] == 0)
2386 /* Hex string is short, or of uneven length.
2387 Return the count that has been converted so far. */
2390 *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]);
2396 /* Convert number NIB to a hex digit. */
2404 return 'a' + nib - 10;
2408 bin2hex (const gdb_byte *bin, char *hex, int count)
2411 /* May use a length, or a nul-terminated string as input. */
2413 count = strlen ((char *) bin);
2415 for (i = 0; i < count; i++)
2417 *hex++ = tohex ((*bin >> 4) & 0xf);
2418 *hex++ = tohex (*bin++ & 0xf);
2424 /* Check for the availability of vCont. This function should also check
2428 remote_vcont_probe (struct remote_state *rs, char *buf)
2430 strcpy (buf, "vCont?");
2432 getpkt (buf, rs->remote_packet_size, 0);
2434 /* Make sure that the features we assume are supported. */
2435 if (strncmp (buf, "vCont", 5) == 0)
2438 int support_s, support_S, support_c, support_C;
2444 while (p && *p == ';')
2447 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
2449 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
2451 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
2453 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
2456 p = strchr (p, ';');
2459 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
2460 BUF will make packet_ok disable the packet. */
2461 if (!support_s || !support_S || !support_c || !support_C)
2465 packet_ok (buf, &remote_protocol_vcont);
2468 /* Resume the remote inferior by using a "vCont" packet. The thread
2469 to be resumed is PTID; STEP and SIGGNAL indicate whether the
2470 resumed thread should be single-stepped and/or signalled. If PTID's
2471 PID is -1, then all threads are resumed; the thread to be stepped and/or
2472 signalled is given in the global INFERIOR_PTID. This function returns
2473 non-zero iff it resumes the inferior.
2475 This function issues a strict subset of all possible vCont commands at the
2479 remote_vcont_resume (ptid_t ptid, int step, enum target_signal siggnal)
2481 struct remote_state *rs = get_remote_state ();
2482 int pid = PIDGET (ptid);
2483 char *buf = NULL, *outbuf;
2484 struct cleanup *old_cleanup;
2486 buf = xmalloc (rs->remote_packet_size);
2487 old_cleanup = make_cleanup (xfree, buf);
2489 if (remote_protocol_vcont.support == PACKET_SUPPORT_UNKNOWN)
2490 remote_vcont_probe (rs, buf);
2492 if (remote_protocol_vcont.support == PACKET_DISABLE)
2494 do_cleanups (old_cleanup);
2498 /* If we could generate a wider range of packets, we'd have to worry
2499 about overflowing BUF. Should there be a generic
2500 "multi-part-packet" packet? */
2502 if (PIDGET (inferior_ptid) == MAGIC_NULL_PID)
2504 /* MAGIC_NULL_PTID means that we don't have any active threads, so we
2505 don't have any PID numbers the inferior will understand. Make sure
2506 to only send forms that do not specify a PID. */
2507 if (step && siggnal != TARGET_SIGNAL_0)
2508 outbuf = xstrprintf ("vCont;S%02x", siggnal);
2510 outbuf = xstrprintf ("vCont;s");
2511 else if (siggnal != TARGET_SIGNAL_0)
2512 outbuf = xstrprintf ("vCont;C%02x", siggnal);
2514 outbuf = xstrprintf ("vCont;c");
2518 /* Resume all threads, with preference for INFERIOR_PTID. */
2519 if (step && siggnal != TARGET_SIGNAL_0)
2520 outbuf = xstrprintf ("vCont;S%02x:%x;c", siggnal,
2521 PIDGET (inferior_ptid));
2523 outbuf = xstrprintf ("vCont;s:%x;c", PIDGET (inferior_ptid));
2524 else if (siggnal != TARGET_SIGNAL_0)
2525 outbuf = xstrprintf ("vCont;C%02x:%x;c", siggnal,
2526 PIDGET (inferior_ptid));
2528 outbuf = xstrprintf ("vCont;c");
2532 /* Scheduler locking; resume only PTID. */
2533 if (step && siggnal != TARGET_SIGNAL_0)
2534 outbuf = xstrprintf ("vCont;S%02x:%x", siggnal, pid);
2536 outbuf = xstrprintf ("vCont;s:%x", pid);
2537 else if (siggnal != TARGET_SIGNAL_0)
2538 outbuf = xstrprintf ("vCont;C%02x:%x", siggnal, pid);
2540 outbuf = xstrprintf ("vCont;c:%x", pid);
2543 gdb_assert (outbuf && strlen (outbuf) < rs->remote_packet_size);
2544 make_cleanup (xfree, outbuf);
2548 do_cleanups (old_cleanup);
2553 /* Tell the remote machine to resume. */
2555 static enum target_signal last_sent_signal = TARGET_SIGNAL_0;
2557 static int last_sent_step;
2560 remote_resume (ptid_t ptid, int step, enum target_signal siggnal)
2562 struct remote_state *rs = get_remote_state ();
2563 char *buf = alloca (rs->remote_packet_size);
2564 int pid = PIDGET (ptid);
2566 last_sent_signal = siggnal;
2567 last_sent_step = step;
2569 /* A hook for when we need to do something at the last moment before
2571 if (deprecated_target_resume_hook)
2572 (*deprecated_target_resume_hook) ();
2574 /* The vCont packet doesn't need to specify threads via Hc. */
2575 if (remote_vcont_resume (ptid, step, siggnal))
2578 /* All other supported resume packets do use Hc, so call set_thread. */
2580 set_thread (0, 0); /* Run any thread. */
2582 set_thread (pid, 0); /* Run this thread. */
2584 if (siggnal != TARGET_SIGNAL_0)
2586 buf[0] = step ? 'S' : 'C';
2587 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
2588 buf[2] = tohex (((int) siggnal) & 0xf);
2592 strcpy (buf, step ? "s" : "c");
2597 /* Same as remote_resume, but with async support. */
2599 remote_async_resume (ptid_t ptid, int step, enum target_signal siggnal)
2601 remote_resume (ptid, step, siggnal);
2603 /* We are about to start executing the inferior, let's register it
2604 with the event loop. NOTE: this is the one place where all the
2605 execution commands end up. We could alternatively do this in each
2606 of the execution commands in infcmd.c. */
2607 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
2608 into infcmd.c in order to allow inferior function calls to work
2609 NOT asynchronously. */
2610 if (target_can_async_p ())
2611 target_async (inferior_event_handler, 0);
2612 /* Tell the world that the target is now executing. */
2613 /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set
2614 this? Instead, should the client of target just assume (for
2615 async targets) that the target is going to start executing? Is
2616 this information already found in the continuation block? */
2617 if (target_is_async_p ())
2618 target_executing = 1;
2622 /* Set up the signal handler for SIGINT, while the target is
2623 executing, ovewriting the 'regular' SIGINT signal handler. */
2625 initialize_sigint_signal_handler (void)
2627 sigint_remote_token =
2628 create_async_signal_handler (async_remote_interrupt, NULL);
2629 signal (SIGINT, handle_remote_sigint);
2632 /* Signal handler for SIGINT, while the target is executing. */
2634 handle_remote_sigint (int sig)
2636 signal (sig, handle_remote_sigint_twice);
2637 sigint_remote_twice_token =
2638 create_async_signal_handler (async_remote_interrupt_twice, NULL);
2639 mark_async_signal_handler_wrapper (sigint_remote_token);
2642 /* Signal handler for SIGINT, installed after SIGINT has already been
2643 sent once. It will take effect the second time that the user sends
2646 handle_remote_sigint_twice (int sig)
2648 signal (sig, handle_sigint);
2649 sigint_remote_twice_token =
2650 create_async_signal_handler (inferior_event_handler_wrapper, NULL);
2651 mark_async_signal_handler_wrapper (sigint_remote_twice_token);
2654 /* Perform the real interruption of the target execution, in response
2657 async_remote_interrupt (gdb_client_data arg)
2660 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
2665 /* Perform interrupt, if the first attempt did not succeed. Just give
2666 up on the target alltogether. */
2668 async_remote_interrupt_twice (gdb_client_data arg)
2671 fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n");
2672 /* Do something only if the target was not killed by the previous
2674 if (target_executing)
2677 signal (SIGINT, handle_remote_sigint);
2681 /* Reinstall the usual SIGINT handlers, after the target has
2684 cleanup_sigint_signal_handler (void *dummy)
2686 signal (SIGINT, handle_sigint);
2687 if (sigint_remote_twice_token)
2688 delete_async_signal_handler ((struct async_signal_handler **)
2689 &sigint_remote_twice_token);
2690 if (sigint_remote_token)
2691 delete_async_signal_handler ((struct async_signal_handler **)
2692 &sigint_remote_token);
2695 /* Send ^C to target to halt it. Target will respond, and send us a
2697 static void (*ofunc) (int);
2699 /* The command line interface's stop routine. This function is installed
2700 as a signal handler for SIGINT. The first time a user requests a
2701 stop, we call remote_stop to send a break or ^C. If there is no
2702 response from the target (it didn't stop when the user requested it),
2703 we ask the user if he'd like to detach from the target. */
2705 remote_interrupt (int signo)
2707 /* If this doesn't work, try more severe steps. */
2708 signal (signo, remote_interrupt_twice);
2711 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
2716 /* The user typed ^C twice. */
2719 remote_interrupt_twice (int signo)
2721 signal (signo, ofunc);
2723 signal (signo, remote_interrupt);
2726 /* This is the generic stop called via the target vector. When a target
2727 interrupt is requested, either by the command line or the GUI, we
2728 will eventually end up here. */
2732 /* Send a break or a ^C, depending on user preference. */
2734 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
2737 serial_send_break (remote_desc);
2739 serial_write (remote_desc, "\003", 1);
2742 /* Ask the user what to do when an interrupt is received. */
2745 interrupt_query (void)
2747 target_terminal_ours ();
2749 if (query ("Interrupted while waiting for the program.\n\
2750 Give up (and stop debugging it)? "))
2752 target_mourn_inferior ();
2753 deprecated_throw_reason (RETURN_QUIT);
2756 target_terminal_inferior ();
2759 /* Enable/disable target terminal ownership. Most targets can use
2760 terminal groups to control terminal ownership. Remote targets are
2761 different in that explicit transfer of ownership to/from GDB/target
2765 remote_async_terminal_inferior (void)
2767 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
2768 sync_execution here. This function should only be called when
2769 GDB is resuming the inferior in the forground. A background
2770 resume (``run&'') should leave GDB in control of the terminal and
2771 consequently should not call this code. */
2772 if (!sync_execution)
2774 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
2775 calls target_terminal_*() idenpotent. The event-loop GDB talking
2776 to an asynchronous target with a synchronous command calls this
2777 function from both event-top.c and infrun.c/infcmd.c. Once GDB
2778 stops trying to transfer the terminal to the target when it
2779 shouldn't this guard can go away. */
2780 if (!remote_async_terminal_ours_p)
2782 delete_file_handler (input_fd);
2783 remote_async_terminal_ours_p = 0;
2784 initialize_sigint_signal_handler ();
2785 /* NOTE: At this point we could also register our selves as the
2786 recipient of all input. Any characters typed could then be
2787 passed on down to the target. */
2791 remote_async_terminal_ours (void)
2793 /* See FIXME in remote_async_terminal_inferior. */
2794 if (!sync_execution)
2796 /* See FIXME in remote_async_terminal_inferior. */
2797 if (remote_async_terminal_ours_p)
2799 cleanup_sigint_signal_handler (NULL);
2800 add_file_handler (input_fd, stdin_event_handler, 0);
2801 remote_async_terminal_ours_p = 1;
2804 /* If nonzero, ignore the next kill. */
2809 remote_console_output (char *msg)
2813 for (p = msg; p[0] && p[1]; p += 2)
2816 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
2819 fputs_unfiltered (tb, gdb_stdtarg);
2821 gdb_flush (gdb_stdtarg);
2824 /* Wait until the remote machine stops, then return,
2825 storing status in STATUS just as `wait' would.
2826 Returns "pid", which in the case of a multi-threaded
2827 remote OS, is the thread-id. */
2830 remote_wait (ptid_t ptid, struct target_waitstatus *status)
2832 struct remote_state *rs = get_remote_state ();
2833 char *buf = alloca (rs->remote_packet_size);
2834 ULONGEST thread_num = -1;
2837 status->kind = TARGET_WAITKIND_EXITED;
2838 status->value.integer = 0;
2844 ofunc = signal (SIGINT, remote_interrupt);
2845 getpkt (buf, rs->remote_packet_size, 1);
2846 signal (SIGINT, ofunc);
2848 /* This is a hook for when we need to do something (perhaps the
2849 collection of trace data) every time the target stops. */
2850 if (deprecated_target_wait_loop_hook)
2851 (*deprecated_target_wait_loop_hook) ();
2853 remote_stopped_by_watchpoint_p = 0;
2857 case 'E': /* Error of some sort. */
2858 warning (_("Remote failure reply: %s"), buf);
2860 case 'F': /* File-I/O request. */
2861 remote_fileio_request (buf);
2863 case 'T': /* Status with PC, SP, FP, ... */
2865 gdb_byte regs[MAX_REGISTER_SIZE];
2867 /* Expedited reply, containing Signal, {regno, reg} repeat. */
2868 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
2870 n... = register number
2871 r... = register contents
2873 p = &buf[3]; /* after Txx */
2882 /* If the packet contains a register number save it in
2883 pnum and set p1 to point to the character following
2884 it. Otherwise p1 points to p. */
2886 /* If this packet is an awatch packet, don't parse the
2887 'a' as a register number. */
2889 if (strncmp (p, "awatch", strlen("awatch")) != 0)
2891 /* Read the ``P'' register number. */
2892 pnum = strtol (p, &p_temp, 16);
2898 if (p1 == p) /* No register number present here. */
2900 p1 = strchr (p, ':');
2902 warning (_("Malformed packet(a) (missing colon): %s\n\
2905 if (strncmp (p, "thread", p1 - p) == 0)
2907 p_temp = unpack_varlen_hex (++p1, &thread_num);
2908 record_currthread (thread_num);
2911 else if ((strncmp (p, "watch", p1 - p) == 0)
2912 || (strncmp (p, "rwatch", p1 - p) == 0)
2913 || (strncmp (p, "awatch", p1 - p) == 0))
2915 remote_stopped_by_watchpoint_p = 1;
2916 p = unpack_varlen_hex (++p1, &addr);
2917 remote_watch_data_address = (CORE_ADDR)addr;
2921 /* Silently skip unknown optional info. */
2922 p_temp = strchr (p1 + 1, ';');
2929 struct packet_reg *reg = packet_reg_from_pnum (rs, pnum);
2933 error (_("Malformed packet(b) (missing colon): %s\n\
2938 error (_("Remote sent bad register number %s: %s\n\
2940 phex_nz (pnum, 0), p, buf);
2942 fieldsize = hex2bin (p, regs,
2943 register_size (current_gdbarch,
2946 if (fieldsize < register_size (current_gdbarch,
2948 warning (_("Remote reply is too short: %s"), buf);
2949 regcache_raw_supply (current_regcache,
2954 error (_("Remote register badly formatted: %s\nhere: %s"),
2959 case 'S': /* Old style status, just signal only. */
2960 status->kind = TARGET_WAITKIND_STOPPED;
2961 status->value.sig = (enum target_signal)
2962 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
2966 thread_num = strtol ((const char *) &buf[4], NULL, 16);
2967 record_currthread (thread_num);
2970 case 'W': /* Target exited. */
2972 /* The remote process exited. */
2973 status->kind = TARGET_WAITKIND_EXITED;
2974 status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
2978 status->kind = TARGET_WAITKIND_SIGNALLED;
2979 status->value.sig = (enum target_signal)
2980 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
2984 case 'O': /* Console output. */
2985 remote_console_output (buf + 1);
2988 if (last_sent_signal != TARGET_SIGNAL_0)
2990 /* Zero length reply means that we tried 'S' or 'C' and
2991 the remote system doesn't support it. */
2992 target_terminal_ours_for_output ();
2994 ("Can't send signals to this remote system. %s not sent.\n",
2995 target_signal_to_name (last_sent_signal));
2996 last_sent_signal = TARGET_SIGNAL_0;
2997 target_terminal_inferior ();
2999 strcpy ((char *) buf, last_sent_step ? "s" : "c");
3000 putpkt ((char *) buf);
3003 /* else fallthrough */
3005 warning (_("Invalid remote reply: %s"), buf);
3010 if (thread_num != -1)
3012 return pid_to_ptid (thread_num);
3014 return inferior_ptid;
3017 /* Async version of remote_wait. */
3019 remote_async_wait (ptid_t ptid, struct target_waitstatus *status)
3021 struct remote_state *rs = get_remote_state ();
3022 char *buf = alloca (rs->remote_packet_size);
3023 ULONGEST thread_num = -1;
3026 status->kind = TARGET_WAITKIND_EXITED;
3027 status->value.integer = 0;
3029 remote_stopped_by_watchpoint_p = 0;
3035 if (!target_is_async_p ())
3036 ofunc = signal (SIGINT, remote_interrupt);
3037 /* FIXME: cagney/1999-09-27: If we're in async mode we should
3038 _never_ wait for ever -> test on target_is_async_p().
3039 However, before we do that we need to ensure that the caller
3040 knows how to take the target into/out of async mode. */
3041 getpkt (buf, rs->remote_packet_size, wait_forever_enabled_p);
3042 if (!target_is_async_p ())
3043 signal (SIGINT, ofunc);
3045 /* This is a hook for when we need to do something (perhaps the
3046 collection of trace data) every time the target stops. */
3047 if (deprecated_target_wait_loop_hook)
3048 (*deprecated_target_wait_loop_hook) ();
3052 case 'E': /* Error of some sort. */
3053 warning (_("Remote failure reply: %s"), buf);
3055 case 'F': /* File-I/O request. */
3056 remote_fileio_request (buf);
3058 case 'T': /* Status with PC, SP, FP, ... */
3060 gdb_byte regs[MAX_REGISTER_SIZE];
3062 /* Expedited reply, containing Signal, {regno, reg} repeat. */
3063 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3065 n... = register number
3066 r... = register contents
3068 p = &buf[3]; /* after Txx */
3077 /* If the packet contains a register number, save it
3078 in pnum and set p1 to point to the character
3079 following it. Otherwise p1 points to p. */
3081 /* If this packet is an awatch packet, don't parse the 'a'
3082 as a register number. */
3084 if (!strncmp (p, "awatch", strlen ("awatch")) != 0)
3086 /* Read the register number. */
3087 pnum = strtol (p, &p_temp, 16);
3093 if (p1 == p) /* No register number present here. */
3095 p1 = strchr (p, ':');
3097 error (_("Malformed packet(a) (missing colon): %s\n\
3100 if (strncmp (p, "thread", p1 - p) == 0)
3102 p_temp = unpack_varlen_hex (++p1, &thread_num);
3103 record_currthread (thread_num);
3106 else if ((strncmp (p, "watch", p1 - p) == 0)
3107 || (strncmp (p, "rwatch", p1 - p) == 0)
3108 || (strncmp (p, "awatch", p1 - p) == 0))
3110 remote_stopped_by_watchpoint_p = 1;
3111 p = unpack_varlen_hex (++p1, &addr);
3112 remote_watch_data_address = (CORE_ADDR)addr;
3116 /* Silently skip unknown optional info. */
3117 p_temp = strchr (p1 + 1, ';');
3125 struct packet_reg *reg = packet_reg_from_pnum (rs, pnum);
3128 error (_("Malformed packet(b) (missing colon): %s\n\
3133 error (_("Remote sent bad register number %ld: %s\n\
3137 fieldsize = hex2bin (p, regs,
3138 register_size (current_gdbarch,
3141 if (fieldsize < register_size (current_gdbarch,
3143 warning (_("Remote reply is too short: %s"), buf);
3144 regcache_raw_supply (current_regcache, reg->regnum, regs);
3148 error (_("Remote register badly formatted: %s\nhere: %s"),
3153 case 'S': /* Old style status, just signal only. */
3154 status->kind = TARGET_WAITKIND_STOPPED;
3155 status->value.sig = (enum target_signal)
3156 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3160 thread_num = strtol ((const char *) &buf[4], NULL, 16);
3161 record_currthread (thread_num);
3164 case 'W': /* Target exited. */
3166 /* The remote process exited. */
3167 status->kind = TARGET_WAITKIND_EXITED;
3168 status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
3172 status->kind = TARGET_WAITKIND_SIGNALLED;
3173 status->value.sig = (enum target_signal)
3174 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3178 case 'O': /* Console output. */
3179 remote_console_output (buf + 1);
3180 /* Return immediately to the event loop. The event loop will
3181 still be waiting on the inferior afterwards. */
3182 status->kind = TARGET_WAITKIND_IGNORE;
3185 if (last_sent_signal != TARGET_SIGNAL_0)
3187 /* Zero length reply means that we tried 'S' or 'C' and
3188 the remote system doesn't support it. */
3189 target_terminal_ours_for_output ();
3191 ("Can't send signals to this remote system. %s not sent.\n",
3192 target_signal_to_name (last_sent_signal));
3193 last_sent_signal = TARGET_SIGNAL_0;
3194 target_terminal_inferior ();
3196 strcpy ((char *) buf, last_sent_step ? "s" : "c");
3197 putpkt ((char *) buf);
3200 /* else fallthrough */
3202 warning (_("Invalid remote reply: %s"), buf);
3207 if (thread_num != -1)
3209 return pid_to_ptid (thread_num);
3211 return inferior_ptid;
3214 /* Number of bytes of registers this stub implements. */
3216 static int register_bytes_found;
3218 /* Read the remote registers into the block REGS. */
3219 /* Currently we just read all the registers, so we don't use regnum. */
3222 fetch_register_using_p (int regnum)
3224 struct remote_state *rs = get_remote_state ();
3225 char *buf = alloca (rs->remote_packet_size), *p;
3226 char regp[MAX_REGISTER_SIZE];
3231 p += hexnumstr (p, regnum);
3233 remote_send (buf, rs->remote_packet_size);
3235 /* If the stub didn't recognize the packet, or if we got an error,
3237 if (buf[0] == '\0' || buf[0] == 'E')
3240 /* If this register is unfetchable, tell the regcache. */
3243 regcache_raw_supply (current_regcache, regnum, NULL);
3244 set_register_cached (regnum, -1);
3248 /* Otherwise, parse and supply the value. */
3255 error (_("fetch_register_using_p: early buf termination"));
3259 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
3262 regcache_raw_supply (current_regcache, regnum, regp);
3267 remote_fetch_registers (int regnum)
3269 struct remote_state *rs = get_remote_state ();
3270 char *buf = alloca (rs->remote_packet_size);
3273 char *regs = alloca (rs->sizeof_g_packet);
3275 set_thread (PIDGET (inferior_ptid), 1);
3279 struct packet_reg *reg = packet_reg_from_regnum (rs, regnum);
3280 gdb_assert (reg != NULL);
3281 if (!reg->in_g_packet)
3282 internal_error (__FILE__, __LINE__,
3283 _("Attempt to fetch a non G-packet register when this "
3284 "remote.c does not support the p-packet."));
3286 switch (remote_protocol_p.support)
3288 case PACKET_DISABLE:
3291 if (fetch_register_using_p (regnum))
3294 error (_("Protocol error: p packet not recognized by stub"));
3295 case PACKET_SUPPORT_UNKNOWN:
3296 if (fetch_register_using_p (regnum))
3298 /* The stub recognized the 'p' packet. Remember this. */
3299 remote_protocol_p.support = PACKET_ENABLE;
3304 /* The stub does not support the 'P' packet. Use 'G'
3305 instead, and don't try using 'P' in the future (it
3306 will just waste our time). */
3307 remote_protocol_p.support = PACKET_DISABLE;
3313 remote_send (buf, rs->remote_packet_size);
3315 /* Save the size of the packet sent to us by the target. Its used
3316 as a heuristic when determining the max size of packets that the
3317 target can safely receive. */
3318 if ((rs->actual_register_packet_size) == 0)
3319 (rs->actual_register_packet_size) = strlen (buf);
3321 /* Unimplemented registers read as all bits zero. */
3322 memset (regs, 0, rs->sizeof_g_packet);
3324 /* We can get out of synch in various cases. If the first character
3325 in the buffer is not a hex character, assume that has happened
3326 and try to fetch another packet to read. */
3327 while ((buf[0] < '0' || buf[0] > '9')
3328 && (buf[0] < 'A' || buf[0] > 'F')
3329 && (buf[0] < 'a' || buf[0] > 'f')
3330 && buf[0] != 'x') /* New: unavailable register value. */
3333 fprintf_unfiltered (gdb_stdlog,
3334 "Bad register packet; fetching a new packet\n");
3335 getpkt (buf, rs->remote_packet_size, 0);
3338 /* Reply describes registers byte by byte, each byte encoded as two
3339 hex characters. Suck them all up, then supply them to the
3340 register cacheing/storage mechanism. */
3343 for (i = 0; i < rs->sizeof_g_packet; i++)
3349 warning (_("Remote reply is of odd length: %s"), buf);
3350 /* Don't change register_bytes_found in this case, and don't
3351 print a second warning. */
3354 if (p[0] == 'x' && p[1] == 'x')
3355 regs[i] = 0; /* 'x' */
3357 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
3361 if (i != register_bytes_found)
3363 register_bytes_found = i;
3364 if (REGISTER_BYTES_OK_P ()
3365 && !REGISTER_BYTES_OK (i))
3366 warning (_("Remote reply is too short: %s"), buf);
3372 for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++)
3374 struct packet_reg *r = &rs->regs[i];
3377 if (r->offset * 2 >= strlen (buf))
3378 /* A short packet that didn't include the register's
3379 value, this implies that the register is zero (and
3380 not that the register is unavailable). Supply that
3382 regcache_raw_supply (current_regcache, r->regnum, NULL);
3383 else if (buf[r->offset * 2] == 'x')
3385 gdb_assert (r->offset * 2 < strlen (buf));
3386 /* The register isn't available, mark it as such (at
3387 the same time setting the value to zero). */
3388 regcache_raw_supply (current_regcache, r->regnum, NULL);
3389 set_register_cached (i, -1);
3392 regcache_raw_supply (current_regcache, r->regnum,
3399 /* Prepare to store registers. Since we may send them all (using a
3400 'G' request), we have to read out the ones we don't want to change
3404 remote_prepare_to_store (void)
3406 struct remote_state *rs = get_remote_state ();
3408 gdb_byte buf[MAX_REGISTER_SIZE];
3410 /* Make sure the entire registers array is valid. */
3411 switch (remote_protocol_P.support)
3413 case PACKET_DISABLE:
3414 case PACKET_SUPPORT_UNKNOWN:
3415 /* Make sure all the necessary registers are cached. */
3416 for (i = 0; i < NUM_REGS; i++)
3417 if (rs->regs[i].in_g_packet)
3418 regcache_raw_read (current_regcache, rs->regs[i].regnum, buf);
3425 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
3426 packet was not recognized. */
3429 store_register_using_P (int regnum)
3431 struct remote_state *rs = get_remote_state ();
3432 struct packet_reg *reg = packet_reg_from_regnum (rs, regnum);
3433 /* Try storing a single register. */
3434 char *buf = alloca (rs->remote_packet_size);
3435 gdb_byte regp[MAX_REGISTER_SIZE];
3438 xsnprintf (buf, rs->remote_packet_size, "P%s=", phex_nz (reg->pnum, 0));
3439 p = buf + strlen (buf);
3440 regcache_raw_collect (current_regcache, reg->regnum, regp);
3441 bin2hex (regp, p, register_size (current_gdbarch, reg->regnum));
3442 remote_send (buf, rs->remote_packet_size);
3444 return buf[0] != '\0';
3448 /* Store register REGNUM, or all registers if REGNUM == -1, from the
3449 contents of the register cache buffer. FIXME: ignores errors. */
3452 remote_store_registers (int regnum)
3454 struct remote_state *rs = get_remote_state ();
3459 set_thread (PIDGET (inferior_ptid), 1);
3463 switch (remote_protocol_P.support)
3465 case PACKET_DISABLE:
3468 if (store_register_using_P (regnum))
3471 error (_("Protocol error: P packet not recognized by stub"));
3472 case PACKET_SUPPORT_UNKNOWN:
3473 if (store_register_using_P (regnum))
3475 /* The stub recognized the 'P' packet. Remember this. */
3476 remote_protocol_P.support = PACKET_ENABLE;
3481 /* The stub does not support the 'P' packet. Use 'G'
3482 instead, and don't try using 'P' in the future (it
3483 will just waste our time). */
3484 remote_protocol_P.support = PACKET_DISABLE;
3490 /* Extract all the registers in the regcache copying them into a
3494 regs = alloca (rs->sizeof_g_packet);
3495 memset (regs, 0, rs->sizeof_g_packet);
3496 for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++)
3498 struct packet_reg *r = &rs->regs[i];
3500 regcache_raw_collect (current_regcache, r->regnum, regs + r->offset);
3504 /* Command describes registers byte by byte,
3505 each byte encoded as two hex characters. */
3506 buf = alloca (rs->remote_packet_size);
3509 /* remote_prepare_to_store insures that register_bytes_found gets set. */
3510 bin2hex (regs, p, register_bytes_found);
3511 remote_send (buf, rs->remote_packet_size);
3515 /* Return the number of hex digits in num. */
3518 hexnumlen (ULONGEST num)
3522 for (i = 0; num != 0; i++)
3528 /* Set BUF to the minimum number of hex digits representing NUM. */
3531 hexnumstr (char *buf, ULONGEST num)
3533 int len = hexnumlen (num);
3534 return hexnumnstr (buf, num, len);
3538 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
3541 hexnumnstr (char *buf, ULONGEST num, int width)
3547 for (i = width - 1; i >= 0; i--)
3549 buf[i] = "0123456789abcdef"[(num & 0xf)];
3556 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
3559 remote_address_masked (CORE_ADDR addr)
3561 if (remote_address_size > 0
3562 && remote_address_size < (sizeof (ULONGEST) * 8))
3564 /* Only create a mask when that mask can safely be constructed
3565 in a ULONGEST variable. */
3567 mask = (mask << remote_address_size) - 1;
3573 /* Determine whether the remote target supports binary downloading.
3574 This is accomplished by sending a no-op memory write of zero length
3575 to the target at the specified address. It does not suffice to send
3576 the whole packet, since many stubs strip the eighth bit and
3577 subsequently compute a wrong checksum, which causes real havoc with
3580 NOTE: This can still lose if the serial line is not eight-bit
3581 clean. In cases like this, the user should clear "remote
3585 check_binary_download (CORE_ADDR addr)
3587 struct remote_state *rs = get_remote_state ();
3589 switch (remote_protocol_binary_download.support)
3591 case PACKET_DISABLE:
3595 case PACKET_SUPPORT_UNKNOWN:
3597 char *buf = alloca (rs->remote_packet_size);
3602 p += hexnumstr (p, (ULONGEST) addr);
3604 p += hexnumstr (p, (ULONGEST) 0);
3608 putpkt_binary (buf, (int) (p - buf));
3609 getpkt (buf, rs->remote_packet_size, 0);
3614 fprintf_unfiltered (gdb_stdlog,
3615 "binary downloading NOT suppported by target\n");
3616 remote_protocol_binary_download.support = PACKET_DISABLE;
3621 fprintf_unfiltered (gdb_stdlog,
3622 "binary downloading suppported by target\n");
3623 remote_protocol_binary_download.support = PACKET_ENABLE;
3630 /* Write memory data directly to the remote machine.
3631 This does not inform the data cache; the data cache uses this.
3632 MEMADDR is the address in the remote memory space.
3633 MYADDR is the address of the buffer in our space.
3634 LEN is the number of bytes.
3636 Returns number of bytes transferred, or 0 (setting errno) for
3637 error. Only transfer a single packet. */
3640 remote_write_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
3650 char *payload_start;
3652 /* Verify that the target can support a binary download. */
3653 check_binary_download (memaddr);
3655 payload_size = get_memory_write_packet_size ();
3657 /* Compute the size, and then allocate space for the largest
3658 possible packet. Include space for an extra trailing NUL. */
3659 sizeof_buf = payload_size + 1;
3660 buf = alloca (sizeof_buf);
3662 /* Compute the size of the actual payload by subtracting out the
3663 packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
3665 payload_size -= strlen ("$M,:#NN");
3666 payload_size -= hexnumlen (memaddr);
3668 /* Construct the packet header: "[MX]<memaddr>,<len>:". */
3670 /* Append "[XM]". Compute a best guess of the number of bytes
3671 actually transfered. */
3673 switch (remote_protocol_binary_download.support)
3677 /* Best guess at number of bytes that will fit. */
3678 todo = min (len, payload_size);
3679 payload_size -= hexnumlen (todo);
3680 todo = min (todo, payload_size);
3682 case PACKET_DISABLE:
3684 /* Num bytes that will fit. */
3685 todo = min (len, payload_size / 2);
3686 payload_size -= hexnumlen (todo);
3687 todo = min (todo, payload_size / 2);
3689 case PACKET_SUPPORT_UNKNOWN:
3690 internal_error (__FILE__, __LINE__,
3691 _("remote_write_bytes: bad internal state"));
3693 internal_error (__FILE__, __LINE__, _("bad switch"));
3696 internal_error (__FILE__, __LINE__,
3697 _("minumum packet size too small to write data"));
3699 /* Append "<memaddr>". */
3700 memaddr = remote_address_masked (memaddr);
3701 p += hexnumstr (p, (ULONGEST) memaddr);
3706 /* Append <len>. Retain the location/size of <len>. It may need to
3707 be adjusted once the packet body has been created. */
3709 plenlen = hexnumstr (p, (ULONGEST) todo);
3716 /* Append the packet body. */
3718 switch (remote_protocol_binary_download.support)
3721 /* Binary mode. Send target system values byte by byte, in
3722 increasing byte addresses. Only escape certain critical
3725 (nr_bytes < todo) && (p - payload_start) < payload_size;
3728 switch (myaddr[nr_bytes] & 0xff)
3733 /* These must be escaped. */
3735 *p++ = (myaddr[nr_bytes] & 0xff) ^ 0x20;
3738 *p++ = myaddr[nr_bytes] & 0xff;
3742 if (nr_bytes < todo)
3744 /* Escape chars have filled up the buffer prematurely,
3745 and we have actually sent fewer bytes than planned.
3746 Fix-up the length field of the packet. Use the same
3747 number of characters as before. */
3748 plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen);
3749 *plen = ':'; /* overwrite \0 from hexnumnstr() */
3752 case PACKET_DISABLE:
3753 /* Normal mode: Send target system values byte by byte, in
3754 increasing byte addresses. Each byte is encoded as a two hex
3756 nr_bytes = bin2hex (myaddr, p, todo);
3759 case PACKET_SUPPORT_UNKNOWN:
3760 internal_error (__FILE__, __LINE__,
3761 _("remote_write_bytes: bad internal state"));
3763 internal_error (__FILE__, __LINE__, _("bad switch"));
3766 putpkt_binary (buf, (int) (p - buf));
3767 getpkt (buf, sizeof_buf, 0);
3771 /* There is no correspondance between what the remote protocol
3772 uses for errors and errno codes. We would like a cleaner way
3773 of representing errors (big enough to include errno codes,
3774 bfd_error codes, and others). But for now just return EIO. */
3779 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
3780 fewer bytes than we'd planned. */
3784 /* Read memory data directly from the remote machine.
3785 This does not use the data cache; the data cache uses this.
3786 MEMADDR is the address in the remote memory space.
3787 MYADDR is the address of the buffer in our space.
3788 LEN is the number of bytes.
3790 Returns number of bytes transferred, or 0 for error. */
3792 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
3793 remote targets) shouldn't attempt to read the entire buffer.
3794 Instead it should read a single packet worth of data and then
3795 return the byte size of that packet to the caller. The caller (its
3796 caller and its callers caller ;-) already contains code for
3797 handling partial reads. */
3800 remote_read_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
3803 int max_buf_size; /* Max size of packet output buffer. */
3807 /* Create a buffer big enough for this packet. */
3808 max_buf_size = get_memory_read_packet_size ();
3809 sizeof_buf = max_buf_size + 1; /* Space for trailing NULL. */
3810 buf = alloca (sizeof_buf);
3819 todo = min (len, max_buf_size / 2); /* num bytes that will fit */
3821 /* construct "m"<memaddr>","<len>" */
3822 /* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */
3823 memaddr = remote_address_masked (memaddr);
3826 p += hexnumstr (p, (ULONGEST) memaddr);
3828 p += hexnumstr (p, (ULONGEST) todo);
3832 getpkt (buf, sizeof_buf, 0);
3835 && isxdigit (buf[1]) && isxdigit (buf[2])
3838 /* There is no correspondance between what the remote
3839 protocol uses for errors and errno codes. We would like
3840 a cleaner way of representing errors (big enough to
3841 include errno codes, bfd_error codes, and others). But
3842 for now just return EIO. */
3847 /* Reply describes memory byte by byte,
3848 each byte encoded as two hex characters. */
3851 if ((i = hex2bin (p, myaddr, todo)) < todo)
3853 /* Reply is short. This means that we were able to read
3854 only part of what we wanted to. */
3855 return i + (origlen - len);
3864 /* Read or write LEN bytes from inferior memory at MEMADDR,
3865 transferring to or from debugger address BUFFER. Write to inferior
3866 if SHOULD_WRITE is nonzero. Returns length of data written or
3867 read; 0 for error. TARGET is unused. */
3870 remote_xfer_memory (CORE_ADDR mem_addr, gdb_byte *buffer, int mem_len,
3871 int should_write, struct mem_attrib *attrib,
3872 struct target_ops *target)
3874 CORE_ADDR targ_addr;
3878 /* Should this be the selected frame? */
3879 gdbarch_remote_translate_xfer_address (current_gdbarch,
3882 &targ_addr, &targ_len);
3887 res = remote_write_bytes (targ_addr, buffer, targ_len);
3889 res = remote_read_bytes (targ_addr, buffer, targ_len);
3895 remote_files_info (struct target_ops *ignore)
3897 puts_filtered ("Debugging a target over a serial line.\n");
3900 /* Stuff for dealing with the packets which are part of this protocol.
3901 See comment at top of file for details. */
3903 /* Read a single character from the remote end, masking it down to 7
3907 readchar (int timeout)
3911 ch = serial_readchar (remote_desc, timeout);
3916 switch ((enum serial_rc) ch)
3919 target_mourn_inferior ();
3920 error (_("Remote connection closed"));
3923 perror_with_name (_("Remote communication error"));
3925 case SERIAL_TIMEOUT:
3931 /* Send the command in BUF to the remote machine, and read the reply
3932 into BUF. Report an error if we get an error reply. */
3935 remote_send (char *buf,
3939 getpkt (buf, sizeof_buf, 0);
3942 error (_("Remote failure reply: %s"), buf);
3945 /* Display a null-terminated packet on stdout, for debugging, using C
3949 print_packet (char *buf)
3951 puts_filtered ("\"");
3952 fputstr_filtered (buf, '"', gdb_stdout);
3953 puts_filtered ("\"");
3959 return putpkt_binary (buf, strlen (buf));
3962 /* Send a packet to the remote machine, with error checking. The data
3963 of the packet is in BUF. The string in BUF can be at most
3964 RS->remote_packet_size - 5 to account for the $, # and checksum,
3965 and for a possible /0 if we are debugging (remote_debug) and want
3966 to print the sent packet as a string. */
3969 putpkt_binary (char *buf, int cnt)
3971 struct remote_state *rs = get_remote_state ();
3973 unsigned char csum = 0;
3974 char *buf2 = alloca (cnt + 6);
3975 long sizeof_junkbuf = rs->remote_packet_size;
3976 char *junkbuf = alloca (sizeof_junkbuf);
3982 /* Copy the packet into buffer BUF2, encapsulating it
3983 and giving it a checksum. */
3988 for (i = 0; i < cnt; i++)
3994 *p++ = tohex ((csum >> 4) & 0xf);
3995 *p++ = tohex (csum & 0xf);
3997 /* Send it over and over until we get a positive ack. */
4001 int started_error_output = 0;
4006 fprintf_unfiltered (gdb_stdlog, "Sending packet: ");
4007 fputstrn_unfiltered (buf2, p - buf2, 0, gdb_stdlog);
4008 fprintf_unfiltered (gdb_stdlog, "...");
4009 gdb_flush (gdb_stdlog);
4011 if (serial_write (remote_desc, buf2, p - buf2))
4012 perror_with_name (_("putpkt: write failed"));
4014 /* Read until either a timeout occurs (-2) or '+' is read. */
4017 ch = readchar (remote_timeout);
4025 case SERIAL_TIMEOUT:
4027 if (started_error_output)
4029 putchar_unfiltered ('\n');
4030 started_error_output = 0;
4039 fprintf_unfiltered (gdb_stdlog, "Ack\n");
4043 fprintf_unfiltered (gdb_stdlog, "Nak\n");
4044 case SERIAL_TIMEOUT:
4048 break; /* Retransmit buffer. */
4052 fprintf_unfiltered (gdb_stdlog,
4053 "Packet instead of Ack, ignoring it\n");
4054 /* It's probably an old response sent because an ACK
4055 was lost. Gobble up the packet and ack it so it
4056 doesn't get retransmitted when we resend this
4058 read_frame (junkbuf, sizeof_junkbuf);
4059 serial_write (remote_desc, "+", 1);
4060 continue; /* Now, go look for +. */
4065 if (!started_error_output)
4067 started_error_output = 1;
4068 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
4070 fputc_unfiltered (ch & 0177, gdb_stdlog);
4074 break; /* Here to retransmit. */
4078 /* This is wrong. If doing a long backtrace, the user should be
4079 able to get out next time we call QUIT, without anything as
4080 violent as interrupt_query. If we want to provide a way out of
4081 here without getting to the next QUIT, it should be based on
4082 hitting ^C twice as in remote_wait. */
4092 /* Come here after finding the start of the frame. Collect the rest
4093 into BUF, verifying the checksum, length, and handling run-length
4094 compression. No more than sizeof_buf-1 characters are read so that
4095 the buffer can be NUL terminated.
4097 Returns -1 on error, number of characters in buffer (ignoring the
4098 trailing NULL) on success. (could be extended to return one of the
4099 SERIAL status indications). */
4102 read_frame (char *buf,
4114 /* ASSERT (bc < sizeof_buf - 1) - space for trailing NULL. */
4115 c = readchar (remote_timeout);
4118 case SERIAL_TIMEOUT:
4120 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
4124 fputs_filtered ("Saw new packet start in middle of old one\n",
4126 return -1; /* Start a new packet, count retries. */
4129 unsigned char pktcsum;
4135 check_0 = readchar (remote_timeout);
4137 check_1 = readchar (remote_timeout);
4139 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
4142 fputs_filtered ("Timeout in checksum, retrying\n",
4146 else if (check_0 < 0 || check_1 < 0)
4149 fputs_filtered ("Communication error in checksum\n",
4154 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
4155 if (csum == pktcsum)
4160 fprintf_filtered (gdb_stdlog,
4161 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
4163 fputs_filtered (buf, gdb_stdlog);
4164 fputs_filtered ("\n", gdb_stdlog);
4166 /* Number of characters in buffer ignoring trailing
4170 case '*': /* Run length encoding. */
4175 c = readchar (remote_timeout);
4177 repeat = c - ' ' + 3; /* Compute repeat count. */
4179 /* The character before ``*'' is repeated. */
4181 if (repeat > 0 && repeat <= 255
4183 && bc + repeat - 1 < sizeof_buf - 1)
4185 memset (&buf[bc], buf[bc - 1], repeat);
4191 printf_filtered (_("Repeat count %d too large for buffer: "),
4193 puts_filtered (buf);
4194 puts_filtered ("\n");
4198 if (bc < sizeof_buf - 1)
4206 puts_filtered ("Remote packet too long: ");
4207 puts_filtered (buf);
4208 puts_filtered ("\n");
4215 /* Read a packet from the remote machine, with error checking, and
4216 store it in BUF. If FOREVER, wait forever rather than timing out;
4217 this is used (in synchronous mode) to wait for a target that is is
4218 executing user code to stop. */
4219 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
4220 don't have to change all the calls to getpkt to deal with the
4221 return value, because at the moment I don't know what the right
4222 thing to do it for those. */
4230 timed_out = getpkt_sane (buf, sizeof_buf, forever);
4234 /* Read a packet from the remote machine, with error checking, and
4235 store it in BUF. If FOREVER, wait forever rather than timing out;
4236 this is used (in synchronous mode) to wait for a target that is is
4237 executing user code to stop. If FOREVER == 0, this function is
4238 allowed to time out gracefully and return an indication of this to
4241 getpkt_sane (char *buf,
4250 strcpy (buf, "timeout");
4254 timeout = watchdog > 0 ? watchdog : -1;
4258 timeout = remote_timeout;
4262 for (tries = 1; tries <= MAX_TRIES; tries++)
4264 /* This can loop forever if the remote side sends us characters
4265 continuously, but if it pauses, we'll get a zero from
4266 readchar because of timeout. Then we'll count that as a
4269 /* Note that we will only wait forever prior to the start of a
4270 packet. After that, we expect characters to arrive at a
4271 brisk pace. They should show up within remote_timeout
4276 c = readchar (timeout);
4278 if (c == SERIAL_TIMEOUT)
4280 if (forever) /* Watchdog went off? Kill the target. */
4283 target_mourn_inferior ();
4284 error (_("Watchdog has expired. Target detached."));
4287 fputs_filtered ("Timed out.\n", gdb_stdlog);
4293 /* We've found the start of a packet, now collect the data. */
4295 val = read_frame (buf, sizeof_buf);
4301 fprintf_unfiltered (gdb_stdlog, "Packet received: ");
4302 fputstr_unfiltered (buf, 0, gdb_stdlog);
4303 fprintf_unfiltered (gdb_stdlog, "\n");
4305 serial_write (remote_desc, "+", 1);
4309 /* Try the whole thing again. */
4311 serial_write (remote_desc, "-", 1);
4314 /* We have tried hard enough, and just can't receive the packet.
4317 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
4318 serial_write (remote_desc, "+", 1);
4325 /* For some mysterious reason, wait_for_inferior calls kill instead of
4326 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4330 target_mourn_inferior ();
4334 /* Use catch_errors so the user can quit from gdb even when we aren't on
4335 speaking terms with the remote system. */
4336 catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
4338 /* Don't wait for it to die. I'm not really sure it matters whether
4339 we do or not. For the existing stubs, kill is a noop. */
4340 target_mourn_inferior ();
4343 /* Async version of remote_kill. */
4345 remote_async_kill (void)
4347 /* Unregister the file descriptor from the event loop. */
4348 if (target_is_async_p ())
4349 serial_async (remote_desc, NULL, 0);
4351 /* For some mysterious reason, wait_for_inferior calls kill instead of
4352 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4356 target_mourn_inferior ();
4360 /* Use catch_errors so the user can quit from gdb even when we
4361 aren't on speaking terms with the remote system. */
4362 catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
4364 /* Don't wait for it to die. I'm not really sure it matters whether
4365 we do or not. For the existing stubs, kill is a noop. */
4366 target_mourn_inferior ();
4372 remote_mourn_1 (&remote_ops);
4376 remote_async_mourn (void)
4378 remote_mourn_1 (&remote_async_ops);
4382 extended_remote_mourn (void)
4384 /* We do _not_ want to mourn the target like this; this will
4385 remove the extended remote target from the target stack,
4386 and the next time the user says "run" it'll fail.
4388 FIXME: What is the right thing to do here? */
4390 remote_mourn_1 (&extended_remote_ops);
4394 /* Worker function for remote_mourn. */
4396 remote_mourn_1 (struct target_ops *target)
4398 unpush_target (target);
4399 generic_mourn_inferior ();
4402 /* In the extended protocol we want to be able to do things like
4403 "run" and have them basically work as expected. So we need
4404 a special create_inferior function.
4406 FIXME: One day add support for changing the exec file
4407 we're debugging, arguments and an environment. */
4410 extended_remote_create_inferior (char *exec_file, char *args,
4411 char **env, int from_tty)
4413 /* Rip out the breakpoints; we'll reinsert them after restarting
4414 the remote server. */
4415 remove_breakpoints ();
4417 /* Now restart the remote server. */
4418 extended_remote_restart ();
4420 /* Now put the breakpoints back in. This way we're safe if the
4421 restart function works via a unix fork on the remote side. */
4422 insert_breakpoints ();
4424 /* Clean up from the last time we were running. */
4425 clear_proceed_status ();
4428 /* Async version of extended_remote_create_inferior. */
4430 extended_remote_async_create_inferior (char *exec_file, char *args,
4431 char **env, int from_tty)
4433 /* Rip out the breakpoints; we'll reinsert them after restarting
4434 the remote server. */
4435 remove_breakpoints ();
4437 /* If running asynchronously, register the target file descriptor
4438 with the event loop. */
4439 if (target_can_async_p ())
4440 target_async (inferior_event_handler, 0);
4442 /* Now restart the remote server. */
4443 extended_remote_restart ();
4445 /* Now put the breakpoints back in. This way we're safe if the
4446 restart function works via a unix fork on the remote side. */
4447 insert_breakpoints ();
4449 /* Clean up from the last time we were running. */
4450 clear_proceed_status ();
4454 /* On some machines, e.g. 68k, we may use a different breakpoint
4455 instruction than other targets; in those use
4456 DEPRECATED_REMOTE_BREAKPOINT instead of just BREAKPOINT_FROM_PC.
4457 Also, bi-endian targets may define
4458 DEPRECATED_LITTLE_REMOTE_BREAKPOINT and
4459 DEPRECATED_BIG_REMOTE_BREAKPOINT. If none of these are defined, we
4460 just call the standard routines that are in mem-break.c. */
4462 /* NOTE: cagney/2003-06-08: This is silly. A remote and simulator
4463 target should use an identical BREAKPOINT_FROM_PC. As for native,
4464 the ARCH-OS-tdep.c code can override the default. */
4466 #if defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && defined (DEPRECATED_BIG_REMOTE_BREAKPOINT) && !defined(DEPRECATED_REMOTE_BREAKPOINT)
4467 #define DEPRECATED_REMOTE_BREAKPOINT
4470 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4472 /* If the target isn't bi-endian, just pretend it is. */
4473 #if !defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && !defined (DEPRECATED_BIG_REMOTE_BREAKPOINT)
4474 #define DEPRECATED_LITTLE_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
4475 #define DEPRECATED_BIG_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
4478 static unsigned char big_break_insn[] = DEPRECATED_BIG_REMOTE_BREAKPOINT;
4479 static unsigned char little_break_insn[] = DEPRECATED_LITTLE_REMOTE_BREAKPOINT;
4481 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4483 /* Insert a breakpoint on targets that don't have any better
4484 breakpoint support. We read the contents of the target location
4485 and stash it, then overwrite it with a breakpoint instruction.
4486 ADDR is the target location in the target machine. CONTENTS_CACHE
4487 is a pointer to memory allocated for saving the target contents.
4488 It is guaranteed by the caller to be long enough to save the number
4489 of bytes returned by BREAKPOINT_FROM_PC. */
4492 remote_insert_breakpoint (CORE_ADDR addr, bfd_byte *contents_cache)
4494 struct remote_state *rs = get_remote_state ();
4495 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4500 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
4501 If it succeeds, then set the support to PACKET_ENABLE. If it
4502 fails, and the user has explicitly requested the Z support then
4503 report an error, otherwise, mark it disabled and go on. */
4505 if (remote_protocol_Z[Z_PACKET_SOFTWARE_BP].support != PACKET_DISABLE)
4507 char *buf = alloca (rs->remote_packet_size);
4510 addr = remote_address_masked (addr);
4514 p += hexnumstr (p, (ULONGEST) addr);
4515 BREAKPOINT_FROM_PC (&addr, &bp_size);
4516 sprintf (p, ",%d", bp_size);
4519 getpkt (buf, rs->remote_packet_size, 0);
4521 switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_SOFTWARE_BP]))
4527 case PACKET_UNKNOWN:
4532 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4533 val = target_read_memory (addr, contents_cache, sizeof big_break_insn);
4537 if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
4538 val = target_write_memory (addr, (char *) big_break_insn,
4539 sizeof big_break_insn);
4541 val = target_write_memory (addr, (char *) little_break_insn,
4542 sizeof little_break_insn);
4547 return memory_insert_breakpoint (addr, contents_cache);
4548 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4552 remote_remove_breakpoint (CORE_ADDR addr, bfd_byte *contents_cache)
4554 struct remote_state *rs = get_remote_state ();
4557 if (remote_protocol_Z[Z_PACKET_SOFTWARE_BP].support != PACKET_DISABLE)
4559 char *buf = alloca (rs->remote_packet_size);
4566 addr = remote_address_masked (addr);
4567 p += hexnumstr (p, (ULONGEST) addr);
4568 BREAKPOINT_FROM_PC (&addr, &bp_size);
4569 sprintf (p, ",%d", bp_size);
4572 getpkt (buf, rs->remote_packet_size, 0);
4574 return (buf[0] == 'E');
4577 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4578 return target_write_memory (addr, contents_cache, sizeof big_break_insn);
4580 return memory_remove_breakpoint (addr, contents_cache);
4581 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4585 watchpoint_to_Z_packet (int type)
4599 internal_error (__FILE__, __LINE__,
4600 _("hw_bp_to_z: bad watchpoint type %d"), type);
4605 remote_insert_watchpoint (CORE_ADDR addr, int len, int type)
4607 struct remote_state *rs = get_remote_state ();
4608 char *buf = alloca (rs->remote_packet_size);
4610 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
4612 if (remote_protocol_Z[packet].support == PACKET_DISABLE)
4613 error (_("Can't set hardware watchpoints without the '%s' (%s) packet."),
4614 remote_protocol_Z[packet].name,
4615 remote_protocol_Z[packet].title);
4617 sprintf (buf, "Z%x,", packet);
4618 p = strchr (buf, '\0');
4619 addr = remote_address_masked (addr);
4620 p += hexnumstr (p, (ULONGEST) addr);
4621 sprintf (p, ",%x", len);
4624 getpkt (buf, rs->remote_packet_size, 0);
4626 switch (packet_ok (buf, &remote_protocol_Z[packet]))
4629 case PACKET_UNKNOWN:
4634 internal_error (__FILE__, __LINE__,
4635 _("remote_insert_watchpoint: reached end of function"));
4640 remote_remove_watchpoint (CORE_ADDR addr, int len, int type)
4642 struct remote_state *rs = get_remote_state ();
4643 char *buf = alloca (rs->remote_packet_size);
4645 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
4647 if (remote_protocol_Z[packet].support == PACKET_DISABLE)
4648 error (_("Can't clear hardware watchpoints without the '%s' (%s) packet."),
4649 remote_protocol_Z[packet].name,
4650 remote_protocol_Z[packet].title);
4652 sprintf (buf, "z%x,", packet);
4653 p = strchr (buf, '\0');
4654 addr = remote_address_masked (addr);
4655 p += hexnumstr (p, (ULONGEST) addr);
4656 sprintf (p, ",%x", len);
4658 getpkt (buf, rs->remote_packet_size, 0);
4660 switch (packet_ok (buf, &remote_protocol_Z[packet]))
4663 case PACKET_UNKNOWN:
4668 internal_error (__FILE__, __LINE__,
4669 _("remote_remove_watchpoint: reached end of function"));
4673 int remote_hw_watchpoint_limit = -1;
4674 int remote_hw_breakpoint_limit = -1;
4677 remote_check_watch_resources (int type, int cnt, int ot)
4679 if (type == bp_hardware_breakpoint)
4681 if (remote_hw_breakpoint_limit == 0)
4683 else if (remote_hw_breakpoint_limit < 0)
4685 else if (cnt <= remote_hw_breakpoint_limit)
4690 if (remote_hw_watchpoint_limit == 0)
4692 else if (remote_hw_watchpoint_limit < 0)
4696 else if (cnt <= remote_hw_watchpoint_limit)
4703 remote_stopped_by_watchpoint (void)
4705 return remote_stopped_by_watchpoint_p;
4708 extern int stepped_after_stopped_by_watchpoint;
4711 remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
4714 if (remote_stopped_by_watchpoint ()
4715 || stepped_after_stopped_by_watchpoint)
4717 *addr_p = remote_watch_data_address;
4726 remote_insert_hw_breakpoint (CORE_ADDR addr, gdb_byte *shadow)
4729 struct remote_state *rs = get_remote_state ();
4730 char *buf = alloca (rs->remote_packet_size);
4733 /* The length field should be set to the size of a breakpoint
4736 BREAKPOINT_FROM_PC (&addr, &len);
4738 if (remote_protocol_Z[Z_PACKET_HARDWARE_BP].support == PACKET_DISABLE)
4739 error (_("Can't set hardware breakpoint without the '%s' (%s) packet."),
4740 remote_protocol_Z[Z_PACKET_HARDWARE_BP].name,
4741 remote_protocol_Z[Z_PACKET_HARDWARE_BP].title);
4747 addr = remote_address_masked (addr);
4748 p += hexnumstr (p, (ULONGEST) addr);
4749 sprintf (p, ",%x", len);
4752 getpkt (buf, rs->remote_packet_size, 0);
4754 switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_HARDWARE_BP]))
4757 case PACKET_UNKNOWN:
4762 internal_error (__FILE__, __LINE__,
4763 _("remote_insert_hw_breakpoint: reached end of function"));
4768 remote_remove_hw_breakpoint (CORE_ADDR addr, gdb_byte *shadow)
4771 struct remote_state *rs = get_remote_state ();
4772 char *buf = alloca (rs->remote_packet_size);
4775 /* The length field should be set to the size of a breakpoint
4778 BREAKPOINT_FROM_PC (&addr, &len);
4780 if (remote_protocol_Z[Z_PACKET_HARDWARE_BP].support == PACKET_DISABLE)
4781 error (_("Can't clear hardware breakpoint without the '%s' (%s) packet."),
4782 remote_protocol_Z[Z_PACKET_HARDWARE_BP].name,
4783 remote_protocol_Z[Z_PACKET_HARDWARE_BP].title);
4789 addr = remote_address_masked (addr);
4790 p += hexnumstr (p, (ULONGEST) addr);
4791 sprintf (p, ",%x", len);
4794 getpkt (buf, rs->remote_packet_size, 0);
4796 switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_HARDWARE_BP]))
4799 case PACKET_UNKNOWN:
4804 internal_error (__FILE__, __LINE__,
4805 _("remote_remove_hw_breakpoint: reached end of function"));
4808 /* Some targets are only capable of doing downloads, and afterwards
4809 they switch to the remote serial protocol. This function provides
4810 a clean way to get from the download target to the remote target.
4811 It's basically just a wrapper so that we don't have to expose any
4812 of the internal workings of remote.c.
4814 Prior to calling this routine, you should shutdown the current
4815 target code, else you will get the "A program is being debugged
4816 already..." message. Usually a call to pop_target() suffices. */
4819 push_remote_target (char *name, int from_tty)
4821 printf_filtered (_("Switching to remote protocol\n"));
4822 remote_open (name, from_tty);
4825 /* Table used by the crc32 function to calcuate the checksum. */
4827 static unsigned long crc32_table[256] =
4830 static unsigned long
4831 crc32 (unsigned char *buf, int len, unsigned int crc)
4833 if (!crc32_table[1])
4835 /* Initialize the CRC table and the decoding table. */
4839 for (i = 0; i < 256; i++)
4841 for (c = i << 24, j = 8; j > 0; --j)
4842 c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
4849 crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255];
4855 /* compare-sections command
4857 With no arguments, compares each loadable section in the exec bfd
4858 with the same memory range on the target, and reports mismatches.
4859 Useful for verifying the image on the target against the exec file.
4860 Depends on the target understanding the new "qCRC:" request. */
4862 /* FIXME: cagney/1999-10-26: This command should be broken down into a
4863 target method (target verify memory) and generic version of the
4864 actual command. This will allow other high-level code (especially
4865 generic_load()) to make use of this target functionality. */
4868 compare_sections_command (char *args, int from_tty)
4870 struct remote_state *rs = get_remote_state ();
4872 unsigned long host_crc, target_crc;
4873 extern bfd *exec_bfd;
4874 struct cleanup *old_chain;
4877 const char *sectname;
4878 char *buf = alloca (rs->remote_packet_size);
4885 error (_("command cannot be used without an exec file"));
4886 if (!current_target.to_shortname ||
4887 strcmp (current_target.to_shortname, "remote") != 0)
4888 error (_("command can only be used with remote target"));
4890 for (s = exec_bfd->sections; s; s = s->next)
4892 if (!(s->flags & SEC_LOAD))
4893 continue; /* skip non-loadable section */
4895 size = bfd_get_section_size (s);
4897 continue; /* skip zero-length section */
4899 sectname = bfd_get_section_name (exec_bfd, s);
4900 if (args && strcmp (args, sectname) != 0)
4901 continue; /* not the section selected by user */
4903 matched = 1; /* do this section */
4905 /* FIXME: assumes lma can fit into long. */
4906 xsnprintf (buf, rs->remote_packet_size, "qCRC:%lx,%lx",
4907 (long) lma, (long) size);
4910 /* Be clever; compute the host_crc before waiting for target
4912 sectdata = xmalloc (size);
4913 old_chain = make_cleanup (xfree, sectdata);
4914 bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
4915 host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff);
4917 getpkt (buf, rs->remote_packet_size, 0);
4919 error (_("target memory fault, section %s, range 0x%s -- 0x%s"),
4920 sectname, paddr (lma), paddr (lma + size));
4922 error (_("remote target does not support this operation"));
4924 for (target_crc = 0, tmp = &buf[1]; *tmp; tmp++)
4925 target_crc = target_crc * 16 + fromhex (*tmp);
4927 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
4928 sectname, paddr (lma), paddr (lma + size));
4929 if (host_crc == target_crc)
4930 printf_filtered ("matched.\n");
4933 printf_filtered ("MIS-MATCHED!\n");
4937 do_cleanups (old_chain);
4940 warning (_("One or more sections of the remote executable does not match\n\
4941 the loaded file\n"));
4942 if (args && !matched)
4943 printf_filtered (_("No loaded section named '%s'.\n"), args);
4947 remote_xfer_partial (struct target_ops *ops, enum target_object object,
4948 const char *annex, gdb_byte *readbuf,
4949 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
4951 struct remote_state *rs = get_remote_state ();
4953 char *buf2 = alloca (rs->remote_packet_size);
4954 char *p2 = &buf2[0];
4957 /* Handle memory using remote_xfer_memory. */
4958 if (object == TARGET_OBJECT_MEMORY)
4963 if (writebuf != NULL)
4965 void *buffer = xmalloc (len);
4966 struct cleanup *cleanup = make_cleanup (xfree, buffer);
4967 memcpy (buffer, writebuf, len);
4968 xfered = remote_xfer_memory (offset, buffer, len, 1, NULL, ops);
4969 do_cleanups (cleanup);
4972 xfered = remote_xfer_memory (offset, readbuf, len, 0, NULL, ops);
4976 else if (xfered == 0 && errno == 0)
4982 /* Only handle reads. */
4983 if (writebuf != NULL || readbuf == NULL)
4986 /* Map pre-existing objects onto letters. DO NOT do this for new
4987 objects!!! Instead specify new query packets. */
4990 case TARGET_OBJECT_KOD:
4993 case TARGET_OBJECT_AVR:
4997 case TARGET_OBJECT_AUXV:
4998 if (remote_protocol_qPart_auxv.support != PACKET_DISABLE)
5000 unsigned int total = 0;
5003 LONGEST n = min ((rs->remote_packet_size - 2) / 2, len);
5004 snprintf (buf2, rs->remote_packet_size,
5005 "qPart:auxv:read::%s,%s",
5006 phex_nz (offset, sizeof offset),
5007 phex_nz (n, sizeof n));
5010 return total > 0 ? total : i;
5012 getpkt (buf2, rs->remote_packet_size, 0);
5013 if (packet_ok (buf2, &remote_protocol_qPart_auxv) != PACKET_OK)
5014 return total > 0 ? total : -1;
5015 if (buf2[0] == 'O' && buf2[1] == 'K' && buf2[2] == '\0')
5016 break; /* Got EOF indicator. */
5017 /* Got some data. */
5018 i = hex2bin (buf2, readbuf, len);
5021 readbuf = (void *) ((char *) readbuf + i);
5035 /* Note: a zero OFFSET and LEN can be used to query the minimum
5037 if (offset == 0 && len == 0)
5038 return (rs->remote_packet_size);
5039 /* Minimum outbuf size is RS->remote_packet_size. If LEN is not
5040 large enough let the caller deal with it. */
5041 if (len < rs->remote_packet_size)
5043 len = rs->remote_packet_size;
5045 /* Except for querying the minimum buffer size, target must be open. */
5047 error (_("remote query is only available after target open"));
5049 gdb_assert (annex != NULL);
5050 gdb_assert (readbuf != NULL);
5055 /* We used one buffer char for the remote protocol q command and
5056 another for the query type. As the remote protocol encapsulation
5057 uses 4 chars plus one extra in case we are debugging
5058 (remote_debug), we have PBUFZIZ - 7 left to pack the query
5061 while (annex[i] && (i < (rs->remote_packet_size - 8)))
5063 /* Bad caller may have sent forbidden characters. */
5064 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
5069 gdb_assert (annex[i] == '\0');
5075 getpkt ((char *) readbuf, len, 0);
5077 return strlen ((char *) readbuf);
5081 remote_rcmd (char *command,
5082 struct ui_file *outbuf)
5084 struct remote_state *rs = get_remote_state ();
5085 char *buf = alloca (rs->remote_packet_size);
5089 error (_("remote rcmd is only available after target open"));
5091 /* Send a NULL command across as an empty command. */
5092 if (command == NULL)
5095 /* The query prefix. */
5096 strcpy (buf, "qRcmd,");
5097 p = strchr (buf, '\0');
5099 if ((strlen (buf) + strlen (command) * 2 + 8/*misc*/) > rs->remote_packet_size)
5100 error (_("\"monitor\" command ``%s'' is too long."), command);
5102 /* Encode the actual command. */
5103 bin2hex ((gdb_byte *) command, p, 0);
5105 if (putpkt (buf) < 0)
5106 error (_("Communication problem with target."));
5108 /* get/display the response */
5111 /* XXX - see also tracepoint.c:remote_get_noisy_reply(). */
5113 getpkt (buf, rs->remote_packet_size, 0);
5115 error (_("Target does not support this command."));
5116 if (buf[0] == 'O' && buf[1] != 'K')
5118 remote_console_output (buf + 1); /* 'O' message from stub. */
5121 if (strcmp (buf, "OK") == 0)
5123 if (strlen (buf) == 3 && buf[0] == 'E'
5124 && isdigit (buf[1]) && isdigit (buf[2]))
5126 error (_("Protocol error with Rcmd"));
5128 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
5130 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
5131 fputc_unfiltered (c, outbuf);
5138 packet_command (char *args, int from_tty)
5140 struct remote_state *rs = get_remote_state ();
5141 char *buf = alloca (rs->remote_packet_size);
5144 error (_("command can only be used with remote target"));
5147 error (_("remote-packet command requires packet text as argument"));
5149 puts_filtered ("sending: ");
5150 print_packet (args);
5151 puts_filtered ("\n");
5154 getpkt (buf, rs->remote_packet_size, 0);
5155 puts_filtered ("received: ");
5157 puts_filtered ("\n");
5161 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
5163 static void display_thread_info (struct gdb_ext_thread_info *info);
5165 static void threadset_test_cmd (char *cmd, int tty);
5167 static void threadalive_test (char *cmd, int tty);
5169 static void threadlist_test_cmd (char *cmd, int tty);
5171 int get_and_display_threadinfo (threadref *ref);
5173 static void threadinfo_test_cmd (char *cmd, int tty);
5175 static int thread_display_step (threadref *ref, void *context);
5177 static void threadlist_update_test_cmd (char *cmd, int tty);
5179 static void init_remote_threadtests (void);
5181 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
5184 threadset_test_cmd (char *cmd, int tty)
5186 int sample_thread = SAMPLE_THREAD;
5188 printf_filtered (_("Remote threadset test\n"));
5189 set_thread (sample_thread, 1);
5194 threadalive_test (char *cmd, int tty)
5196 int sample_thread = SAMPLE_THREAD;
5198 if (remote_thread_alive (pid_to_ptid (sample_thread)))
5199 printf_filtered ("PASS: Thread alive test\n");
5201 printf_filtered ("FAIL: Thread alive test\n");
5204 void output_threadid (char *title, threadref *ref);
5207 output_threadid (char *title, threadref *ref)
5211 pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
5213 printf_filtered ("%s %s\n", title, (&hexid[0]));
5217 threadlist_test_cmd (char *cmd, int tty)
5220 threadref nextthread;
5221 int done, result_count;
5222 threadref threadlist[3];
5224 printf_filtered ("Remote Threadlist test\n");
5225 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
5226 &result_count, &threadlist[0]))
5227 printf_filtered ("FAIL: threadlist test\n");
5230 threadref *scan = threadlist;
5231 threadref *limit = scan + result_count;
5233 while (scan < limit)
5234 output_threadid (" thread ", scan++);
5239 display_thread_info (struct gdb_ext_thread_info *info)
5241 output_threadid ("Threadid: ", &info->threadid);
5242 printf_filtered ("Name: %s\n ", info->shortname);
5243 printf_filtered ("State: %s\n", info->display);
5244 printf_filtered ("other: %s\n\n", info->more_display);
5248 get_and_display_threadinfo (threadref *ref)
5252 struct gdb_ext_thread_info threadinfo;
5254 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
5255 | TAG_MOREDISPLAY | TAG_DISPLAY;
5256 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
5257 display_thread_info (&threadinfo);
5262 threadinfo_test_cmd (char *cmd, int tty)
5264 int athread = SAMPLE_THREAD;
5268 int_to_threadref (&thread, athread);
5269 printf_filtered ("Remote Threadinfo test\n");
5270 if (!get_and_display_threadinfo (&thread))
5271 printf_filtered ("FAIL cannot get thread info\n");
5275 thread_display_step (threadref *ref, void *context)
5277 /* output_threadid(" threadstep ",ref); *//* simple test */
5278 return get_and_display_threadinfo (ref);
5282 threadlist_update_test_cmd (char *cmd, int tty)
5284 printf_filtered ("Remote Threadlist update test\n");
5285 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
5289 init_remote_threadtests (void)
5291 add_com ("tlist", class_obscure, threadlist_test_cmd, _("\
5292 Fetch and print the remote list of thread identifiers, one pkt only"));
5293 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
5294 _("Fetch and display info about one thread"));
5295 add_com ("tset", class_obscure, threadset_test_cmd,
5296 _("Test setting to a different thread"));
5297 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
5298 _("Iterate through updating all remote thread info"));
5299 add_com ("talive", class_obscure, threadalive_test,
5300 _(" Remote thread alive test "));
5305 /* Convert a thread ID to a string. Returns the string in a static
5309 remote_pid_to_str (ptid_t ptid)
5311 static char buf[32];
5313 xsnprintf (buf, sizeof buf, "thread %d", ptid_get_pid (ptid));
5317 /* Get the address of the thread local variable in OBJFILE which is
5318 stored at OFFSET within the thread local storage for thread PTID. */
5321 remote_get_thread_local_address (ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset)
5323 if (remote_protocol_qGetTLSAddr.support != PACKET_DISABLE)
5325 struct remote_state *rs = get_remote_state ();
5326 char *buf = alloca (rs->remote_packet_size);
5328 enum packet_result result;
5330 strcpy (p, "qGetTLSAddr:");
5332 p += hexnumstr (p, PIDGET (ptid));
5334 p += hexnumstr (p, offset);
5336 p += hexnumstr (p, lm);
5340 getpkt (buf, rs->remote_packet_size, 0);
5341 result = packet_ok (buf, &remote_protocol_qGetTLSAddr);
5342 if (result == PACKET_OK)
5346 unpack_varlen_hex (buf, &result);
5349 else if (result == PACKET_UNKNOWN)
5350 throw_error (TLS_GENERIC_ERROR,
5351 _("Remote target doesn't support qGetTLSAddr packet"));
5353 throw_error (TLS_GENERIC_ERROR,
5354 _("Remote target failed to process qGetTLSAddr request"));
5357 throw_error (TLS_GENERIC_ERROR,
5358 _("TLS not supported or disabled on this target"));
5364 init_remote_ops (void)
5366 remote_ops.to_shortname = "remote";
5367 remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
5369 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5370 Specify the serial device it is connected to\n\
5371 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
5372 remote_ops.to_open = remote_open;
5373 remote_ops.to_close = remote_close;
5374 remote_ops.to_detach = remote_detach;
5375 remote_ops.to_disconnect = remote_disconnect;
5376 remote_ops.to_resume = remote_resume;
5377 remote_ops.to_wait = remote_wait;
5378 remote_ops.to_fetch_registers = remote_fetch_registers;
5379 remote_ops.to_store_registers = remote_store_registers;
5380 remote_ops.to_prepare_to_store = remote_prepare_to_store;
5381 remote_ops.deprecated_xfer_memory = remote_xfer_memory;
5382 remote_ops.to_files_info = remote_files_info;
5383 remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
5384 remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
5385 remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
5386 remote_ops.to_stopped_data_address = remote_stopped_data_address;
5387 remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
5388 remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
5389 remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
5390 remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
5391 remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
5392 remote_ops.to_kill = remote_kill;
5393 remote_ops.to_load = generic_load;
5394 remote_ops.to_mourn_inferior = remote_mourn;
5395 remote_ops.to_thread_alive = remote_thread_alive;
5396 remote_ops.to_find_new_threads = remote_threads_info;
5397 remote_ops.to_pid_to_str = remote_pid_to_str;
5398 remote_ops.to_extra_thread_info = remote_threads_extra_info;
5399 remote_ops.to_stop = remote_stop;
5400 remote_ops.to_xfer_partial = remote_xfer_partial;
5401 remote_ops.to_rcmd = remote_rcmd;
5402 remote_ops.to_get_thread_local_address = remote_get_thread_local_address;
5403 remote_ops.to_stratum = process_stratum;
5404 remote_ops.to_has_all_memory = 1;
5405 remote_ops.to_has_memory = 1;
5406 remote_ops.to_has_stack = 1;
5407 remote_ops.to_has_registers = 1;
5408 remote_ops.to_has_execution = 1;
5409 remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
5410 remote_ops.to_magic = OPS_MAGIC;
5413 /* Set up the extended remote vector by making a copy of the standard
5414 remote vector and adding to it. */
5417 init_extended_remote_ops (void)
5419 extended_remote_ops = remote_ops;
5421 extended_remote_ops.to_shortname = "extended-remote";
5422 extended_remote_ops.to_longname =
5423 "Extended remote serial target in gdb-specific protocol";
5424 extended_remote_ops.to_doc =
5425 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5426 Specify the serial device it is connected to (e.g. /dev/ttya).",
5427 extended_remote_ops.to_open = extended_remote_open;
5428 extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
5429 extended_remote_ops.to_mourn_inferior = extended_remote_mourn;
5433 remote_can_async_p (void)
5435 /* We're async whenever the serial device is. */
5436 return (current_target.to_async_mask_value) && serial_can_async_p (remote_desc);
5440 remote_is_async_p (void)
5442 /* We're async whenever the serial device is. */
5443 return (current_target.to_async_mask_value) && serial_is_async_p (remote_desc);
5446 /* Pass the SERIAL event on and up to the client. One day this code
5447 will be able to delay notifying the client of an event until the
5448 point where an entire packet has been received. */
5450 static void (*async_client_callback) (enum inferior_event_type event_type,
5452 static void *async_client_context;
5453 static serial_event_ftype remote_async_serial_handler;
5456 remote_async_serial_handler (struct serial *scb, void *context)
5458 /* Don't propogate error information up to the client. Instead let
5459 the client find out about the error by querying the target. */
5460 async_client_callback (INF_REG_EVENT, async_client_context);
5464 remote_async (void (*callback) (enum inferior_event_type event_type,
5465 void *context), void *context)
5467 if (current_target.to_async_mask_value == 0)
5468 internal_error (__FILE__, __LINE__,
5469 _("Calling remote_async when async is masked"));
5471 if (callback != NULL)
5473 serial_async (remote_desc, remote_async_serial_handler, NULL);
5474 async_client_callback = callback;
5475 async_client_context = context;
5478 serial_async (remote_desc, NULL, NULL);
5481 /* Target async and target extended-async.
5483 This are temporary targets, until it is all tested. Eventually
5484 async support will be incorporated int the usual 'remote'
5488 init_remote_async_ops (void)
5490 remote_async_ops.to_shortname = "async";
5491 remote_async_ops.to_longname =
5492 "Remote serial target in async version of the gdb-specific protocol";
5493 remote_async_ops.to_doc =
5494 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5495 Specify the serial device it is connected to (e.g. /dev/ttya).";
5496 remote_async_ops.to_open = remote_async_open;
5497 remote_async_ops.to_close = remote_close;
5498 remote_async_ops.to_detach = remote_detach;
5499 remote_async_ops.to_disconnect = remote_disconnect;
5500 remote_async_ops.to_resume = remote_async_resume;
5501 remote_async_ops.to_wait = remote_async_wait;
5502 remote_async_ops.to_fetch_registers = remote_fetch_registers;
5503 remote_async_ops.to_store_registers = remote_store_registers;
5504 remote_async_ops.to_prepare_to_store = remote_prepare_to_store;
5505 remote_async_ops.deprecated_xfer_memory = remote_xfer_memory;
5506 remote_async_ops.to_files_info = remote_files_info;
5507 remote_async_ops.to_insert_breakpoint = remote_insert_breakpoint;
5508 remote_async_ops.to_remove_breakpoint = remote_remove_breakpoint;
5509 remote_async_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
5510 remote_async_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
5511 remote_async_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
5512 remote_async_ops.to_insert_watchpoint = remote_insert_watchpoint;
5513 remote_async_ops.to_remove_watchpoint = remote_remove_watchpoint;
5514 remote_async_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
5515 remote_async_ops.to_stopped_data_address = remote_stopped_data_address;
5516 remote_async_ops.to_terminal_inferior = remote_async_terminal_inferior;
5517 remote_async_ops.to_terminal_ours = remote_async_terminal_ours;
5518 remote_async_ops.to_kill = remote_async_kill;
5519 remote_async_ops.to_load = generic_load;
5520 remote_async_ops.to_mourn_inferior = remote_async_mourn;
5521 remote_async_ops.to_thread_alive = remote_thread_alive;
5522 remote_async_ops.to_find_new_threads = remote_threads_info;
5523 remote_async_ops.to_pid_to_str = remote_pid_to_str;
5524 remote_async_ops.to_extra_thread_info = remote_threads_extra_info;
5525 remote_async_ops.to_stop = remote_stop;
5526 remote_async_ops.to_xfer_partial = remote_xfer_partial;
5527 remote_async_ops.to_rcmd = remote_rcmd;
5528 remote_async_ops.to_stratum = process_stratum;
5529 remote_async_ops.to_has_all_memory = 1;
5530 remote_async_ops.to_has_memory = 1;
5531 remote_async_ops.to_has_stack = 1;
5532 remote_async_ops.to_has_registers = 1;
5533 remote_async_ops.to_has_execution = 1;
5534 remote_async_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
5535 remote_async_ops.to_can_async_p = remote_can_async_p;
5536 remote_async_ops.to_is_async_p = remote_is_async_p;
5537 remote_async_ops.to_async = remote_async;
5538 remote_async_ops.to_async_mask_value = 1;
5539 remote_async_ops.to_magic = OPS_MAGIC;
5542 /* Set up the async extended remote vector by making a copy of the standard
5543 remote vector and adding to it. */
5546 init_extended_async_remote_ops (void)
5548 extended_async_remote_ops = remote_async_ops;
5550 extended_async_remote_ops.to_shortname = "extended-async";
5551 extended_async_remote_ops.to_longname =
5552 "Extended remote serial target in async gdb-specific protocol";
5553 extended_async_remote_ops.to_doc =
5554 "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
5555 Specify the serial device it is connected to (e.g. /dev/ttya).",
5556 extended_async_remote_ops.to_open = extended_remote_async_open;
5557 extended_async_remote_ops.to_create_inferior = extended_remote_async_create_inferior;
5558 extended_async_remote_ops.to_mourn_inferior = extended_remote_mourn;
5562 set_remote_cmd (char *args, int from_tty)
5567 show_remote_cmd (char *args, int from_tty)
5569 /* FIXME: cagney/2002-06-15: This function should iterate over
5570 remote_show_cmdlist for a list of sub commands to show. */
5571 show_remote_protocol_Z_packet_cmd (gdb_stdout, from_tty, NULL, NULL);
5572 show_remote_protocol_P_packet_cmd (gdb_stdout, from_tty, NULL, NULL);
5573 show_remote_protocol_p_packet_cmd (gdb_stdout, from_tty, NULL, NULL);
5574 show_remote_protocol_qSymbol_packet_cmd (gdb_stdout, from_tty, NULL, NULL);
5575 show_remote_protocol_vcont_packet_cmd (gdb_stdout, from_tty, NULL, NULL);
5576 show_remote_protocol_binary_download_cmd (gdb_stdout, from_tty, NULL, NULL);
5577 show_remote_protocol_qPart_auxv_packet_cmd (gdb_stdout, from_tty, NULL, NULL);
5578 show_remote_protocol_qGetTLSAddr_packet_cmd (gdb_stdout, from_tty, NULL, NULL);
5582 build_remote_gdbarch_data (void)
5584 remote_address_size = TARGET_ADDR_BIT;
5587 /* Saved pointer to previous owner of the new_objfile event. */
5588 static void (*remote_new_objfile_chain) (struct objfile *);
5590 /* Function to be called whenever a new objfile (shlib) is detected. */
5592 remote_new_objfile (struct objfile *objfile)
5594 if (remote_desc != 0) /* Have a remote connection. */
5596 remote_check_symbols (objfile);
5598 /* Call predecessor on chain, if any. */
5599 if (remote_new_objfile_chain != 0 &&
5601 remote_new_objfile_chain (objfile);
5605 _initialize_remote (void)
5607 static struct cmd_list_element *remote_set_cmdlist;
5608 static struct cmd_list_element *remote_show_cmdlist;
5610 /* architecture specific data */
5611 remote_gdbarch_data_handle =
5612 gdbarch_data_register_post_init (init_remote_state);
5614 /* Old tacky stuff. NOTE: This comes after the remote protocol so
5615 that the remote protocol has been initialized. */
5616 DEPRECATED_REGISTER_GDBARCH_SWAP (remote_address_size);
5617 deprecated_register_gdbarch_swap (NULL, 0, build_remote_gdbarch_data);
5620 add_target (&remote_ops);
5622 init_extended_remote_ops ();
5623 add_target (&extended_remote_ops);
5625 init_remote_async_ops ();
5626 add_target (&remote_async_ops);
5628 init_extended_async_remote_ops ();
5629 add_target (&extended_async_remote_ops);
5631 /* Hook into new objfile notification. */
5632 remote_new_objfile_chain = deprecated_target_new_objfile_hook;
5633 deprecated_target_new_objfile_hook = remote_new_objfile;
5636 init_remote_threadtests ();
5639 /* set/show remote ... */
5641 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
5642 Remote protocol specific variables\n\
5643 Configure various remote-protocol specific variables such as\n\
5644 the packets being used"),
5645 &remote_set_cmdlist, "set remote ",
5646 0 /* allow-unknown */, &setlist);
5647 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
5648 Remote protocol specific variables\n\
5649 Configure various remote-protocol specific variables such as\n\
5650 the packets being used"),
5651 &remote_show_cmdlist, "show remote ",
5652 0 /* allow-unknown */, &showlist);
5654 add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
5655 Compare section data on target to the exec file.\n\
5656 Argument is a single section name (default: all loaded sections)."),
5659 add_cmd ("packet", class_maintenance, packet_command, _("\
5660 Send an arbitrary packet to a remote target.\n\
5661 maintenance packet TEXT\n\
5662 If GDB is talking to an inferior via the GDB serial protocol, then\n\
5663 this command sends the string TEXT to the inferior, and displays the\n\
5664 response packet. GDB supplies the initial `$' character, and the\n\
5665 terminating `#' character and checksum."),
5668 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
5669 Set whether to send break if interrupted."), _("\
5670 Show whether to send break if interrupted."), _("\
5671 If set, a break, instead of a cntrl-c, is sent to the remote target."),
5672 NULL, NULL, /* FIXME: i18n: Whether to send break if interrupted is %s. */
5673 &setlist, &showlist);
5675 /* Install commands for configuring memory read/write packets. */
5677 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
5678 Set the maximum number of bytes per memory write packet (deprecated)."),
5680 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
5681 Show the maximum number of bytes per memory write packet (deprecated)."),
5683 add_cmd ("memory-write-packet-size", no_class,
5684 set_memory_write_packet_size, _("\
5685 Set the maximum number of bytes per memory-write packet.\n\
5686 Specify the number of bytes in a packet or 0 (zero) for the\n\
5687 default packet size. The actual limit is further reduced\n\
5688 dependent on the target. Specify ``fixed'' to disable the\n\
5689 further restriction and ``limit'' to enable that restriction."),
5690 &remote_set_cmdlist);
5691 add_cmd ("memory-read-packet-size", no_class,
5692 set_memory_read_packet_size, _("\
5693 Set the maximum number of bytes per memory-read packet.\n\
5694 Specify the number of bytes in a packet or 0 (zero) for the\n\
5695 default packet size. The actual limit is further reduced\n\
5696 dependent on the target. Specify ``fixed'' to disable the\n\
5697 further restriction and ``limit'' to enable that restriction."),
5698 &remote_set_cmdlist);
5699 add_cmd ("memory-write-packet-size", no_class,
5700 show_memory_write_packet_size,
5701 _("Show the maximum number of bytes per memory-write packet."),
5702 &remote_show_cmdlist);
5703 add_cmd ("memory-read-packet-size", no_class,
5704 show_memory_read_packet_size,
5705 _("Show the maximum number of bytes per memory-read packet."),
5706 &remote_show_cmdlist);
5708 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class,
5709 &remote_hw_watchpoint_limit, _("\
5710 Set the maximum number of target hardware watchpoints."), _("\
5711 Show the maximum number of target hardware watchpoints."), _("\
5712 Specify a negative limit for unlimited."),
5713 NULL, NULL, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
5714 &remote_set_cmdlist, &remote_show_cmdlist);
5715 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class,
5716 &remote_hw_breakpoint_limit, _("\
5717 Set the maximum number of target hardware breakpoints."), _("\
5718 Show the maximum number of target hardware breakpoints."), _("\
5719 Specify a negative limit for unlimited."),
5720 NULL, NULL, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
5721 &remote_set_cmdlist, &remote_show_cmdlist);
5723 add_setshow_integer_cmd ("remoteaddresssize", class_obscure,
5724 &remote_address_size, _("\
5725 Set the maximum size of the address (in bits) in a memory packet."), _("\
5726 Show the maximum size of the address (in bits) in a memory packet."), NULL,
5728 NULL, /* FIXME: i18n: */
5729 &setlist, &showlist);
5731 add_packet_config_cmd (&remote_protocol_binary_download,
5732 "X", "binary-download",
5733 set_remote_protocol_binary_download_cmd,
5734 show_remote_protocol_binary_download_cmd,
5735 &remote_set_cmdlist, &remote_show_cmdlist,
5738 add_packet_config_cmd (&remote_protocol_vcont,
5739 "vCont", "verbose-resume",
5740 set_remote_protocol_vcont_packet_cmd,
5741 show_remote_protocol_vcont_packet_cmd,
5742 &remote_set_cmdlist, &remote_show_cmdlist,
5745 add_packet_config_cmd (&remote_protocol_qSymbol,
5746 "qSymbol", "symbol-lookup",
5747 set_remote_protocol_qSymbol_packet_cmd,
5748 show_remote_protocol_qSymbol_packet_cmd,
5749 &remote_set_cmdlist, &remote_show_cmdlist,
5752 add_packet_config_cmd (&remote_protocol_P,
5753 "P", "set-register",
5754 set_remote_protocol_P_packet_cmd,
5755 show_remote_protocol_P_packet_cmd,
5756 &remote_set_cmdlist, &remote_show_cmdlist,
5759 add_packet_config_cmd (&remote_protocol_p,
5760 "p", "fetch-register",
5761 set_remote_protocol_p_packet_cmd,
5762 show_remote_protocol_p_packet_cmd,
5763 &remote_set_cmdlist, &remote_show_cmdlist,
5766 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP],
5767 "Z0", "software-breakpoint",
5768 set_remote_protocol_Z_software_bp_packet_cmd,
5769 show_remote_protocol_Z_software_bp_packet_cmd,
5770 &remote_set_cmdlist, &remote_show_cmdlist,
5773 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_HARDWARE_BP],
5774 "Z1", "hardware-breakpoint",
5775 set_remote_protocol_Z_hardware_bp_packet_cmd,
5776 show_remote_protocol_Z_hardware_bp_packet_cmd,
5777 &remote_set_cmdlist, &remote_show_cmdlist,
5780 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_WRITE_WP],
5781 "Z2", "write-watchpoint",
5782 set_remote_protocol_Z_write_wp_packet_cmd,
5783 show_remote_protocol_Z_write_wp_packet_cmd,
5784 &remote_set_cmdlist, &remote_show_cmdlist,
5787 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_READ_WP],
5788 "Z3", "read-watchpoint",
5789 set_remote_protocol_Z_read_wp_packet_cmd,
5790 show_remote_protocol_Z_read_wp_packet_cmd,
5791 &remote_set_cmdlist, &remote_show_cmdlist,
5794 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_ACCESS_WP],
5795 "Z4", "access-watchpoint",
5796 set_remote_protocol_Z_access_wp_packet_cmd,
5797 show_remote_protocol_Z_access_wp_packet_cmd,
5798 &remote_set_cmdlist, &remote_show_cmdlist,
5801 add_packet_config_cmd (&remote_protocol_qPart_auxv,
5802 "qPart_auxv", "read-aux-vector",
5803 set_remote_protocol_qPart_auxv_packet_cmd,
5804 show_remote_protocol_qPart_auxv_packet_cmd,
5805 &remote_set_cmdlist, &remote_show_cmdlist,
5808 add_packet_config_cmd (&remote_protocol_qGetTLSAddr,
5809 "qGetTLSAddr", "get-thread-local-storage-address",
5810 set_remote_protocol_qGetTLSAddr_packet_cmd,
5811 show_remote_protocol_qGetTLSAddr_packet_cmd,
5812 &remote_set_cmdlist, &remote_show_cmdlist,
5815 /* Keep the old ``set remote Z-packet ...'' working. */
5816 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
5817 &remote_Z_packet_detect, _("\
5818 Set use of remote protocol `Z' packets"), _("\
5819 Show use of remote protocol `Z' packets "), _("\
5820 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
5822 set_remote_protocol_Z_packet_cmd,
5823 show_remote_protocol_Z_packet_cmd, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
5824 &remote_set_cmdlist, &remote_show_cmdlist);
5826 /* Eventually initialize fileio. See fileio.c */
5827 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);