1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
4 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
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., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
24 /* See the GDB User Guide for details of the GDB remote protocol. */
27 #include "gdb_string.h"
34 /*#include "terminal.h" */
37 #include "gdb-stabs.h"
38 #include "gdbthread.h"
42 #include "gdb_assert.h"
47 #include "event-loop.h"
48 #include "event-top.h"
54 #include "gdbcore.h" /* for exec_bfd */
56 #include "remote-fileio.h"
58 /* Prototypes for local functions */
59 static void cleanup_sigint_signal_handler (void *dummy);
60 static void initialize_sigint_signal_handler (void);
61 static int getpkt_sane (char *buf, long sizeof_buf, int forever);
63 static void handle_remote_sigint (int);
64 static void handle_remote_sigint_twice (int);
65 static void async_remote_interrupt (gdb_client_data);
66 void async_remote_interrupt_twice (gdb_client_data);
68 static void build_remote_gdbarch_data (void);
70 static void remote_files_info (struct target_ops *ignore);
72 static int remote_xfer_memory (CORE_ADDR memaddr, char *myaddr,
73 int len, int should_write,
74 struct mem_attrib *attrib,
75 struct target_ops *target);
77 static void remote_prepare_to_store (void);
79 static void remote_fetch_registers (int regno);
81 static void remote_resume (ptid_t ptid, int step,
82 enum target_signal siggnal);
83 static void remote_async_resume (ptid_t ptid, int step,
84 enum target_signal siggnal);
85 static int remote_start_remote (struct ui_out *uiout, void *dummy);
87 static void remote_open (char *name, int from_tty);
88 static void remote_async_open (char *name, int from_tty);
90 static void extended_remote_open (char *name, int from_tty);
91 static void extended_remote_async_open (char *name, int from_tty);
93 static void remote_open_1 (char *, int, struct target_ops *, int extended_p,
96 static void remote_close (int quitting);
98 static void remote_store_registers (int regno);
100 static void remote_mourn (void);
101 static void remote_async_mourn (void);
103 static void extended_remote_restart (void);
105 static void extended_remote_mourn (void);
107 static void remote_mourn_1 (struct target_ops *);
109 static void remote_send (char *buf, long sizeof_buf);
111 static int readchar (int timeout);
113 static ptid_t remote_wait (ptid_t ptid,
114 struct target_waitstatus *status);
115 static ptid_t remote_async_wait (ptid_t ptid,
116 struct target_waitstatus *status);
118 static void remote_kill (void);
119 static void remote_async_kill (void);
121 static int tohex (int nib);
123 static void remote_detach (char *args, int from_tty);
125 static void remote_interrupt (int signo);
127 static void remote_interrupt_twice (int signo);
129 static void interrupt_query (void);
131 static void set_thread (int, int);
133 static int remote_thread_alive (ptid_t);
135 static void get_offsets (void);
137 static long read_frame (char *buf, long sizeof_buf);
139 static int remote_insert_breakpoint (CORE_ADDR, char *);
141 static int remote_remove_breakpoint (CORE_ADDR, char *);
143 static int hexnumlen (ULONGEST num);
145 static void init_remote_ops (void);
147 static void init_extended_remote_ops (void);
149 static void remote_stop (void);
151 static int ishex (int ch, int *val);
153 static int stubhex (int ch);
155 static int hexnumstr (char *, ULONGEST);
157 static int hexnumnstr (char *, ULONGEST, int);
159 static CORE_ADDR remote_address_masked (CORE_ADDR);
161 static void print_packet (char *);
163 static unsigned long crc32 (unsigned char *, int, unsigned int);
165 static void compare_sections_command (char *, int);
167 static void packet_command (char *, int);
169 static int stub_unpack_int (char *buff, int fieldlength);
171 static ptid_t remote_current_thread (ptid_t oldptid);
173 static void remote_find_new_threads (void);
175 static void record_currthread (int currthread);
177 static int fromhex (int a);
179 static int hex2bin (const char *hex, char *bin, int count);
181 static int bin2hex (const char *bin, char *hex, int count);
183 static int putpkt_binary (char *buf, int cnt);
185 static void check_binary_download (CORE_ADDR addr);
187 struct packet_config;
189 static void show_packet_config_cmd (struct packet_config *config);
191 static void update_packet_config (struct packet_config *config);
193 void _initialize_remote (void);
195 /* Description of the remote protocol. Strictly speaking, when the
196 target is open()ed, remote.c should create a per-target description
197 of the remote protocol using that target's architecture.
198 Unfortunately, the target stack doesn't include local state. For
199 the moment keep the information in the target's architecture
204 long offset; /* Offset into G packet. */
205 long regnum; /* GDB's internal register number. */
206 LONGEST pnum; /* Remote protocol register number. */
207 int in_g_packet; /* Always part of G packet. */
208 /* long size in bytes; == register_size (current_gdbarch, regnum); at present. */
209 /* char *name; == REGISTER_NAME (regnum); at present. */
214 /* Description of the remote protocol registers. */
215 long sizeof_g_packet;
217 /* Description of the remote protocol registers indexed by REGNUM
218 (making an array of NUM_REGS + NUM_PSEUDO_REGS in size). */
219 struct packet_reg *regs;
221 /* This is the size (in chars) of the first response to the ``g''
222 packet. It is used as a heuristic when determining the maximum
223 size of memory-read and memory-write packets. A target will
224 typically only reserve a buffer large enough to hold the ``g''
225 packet. The size does not include packet overhead (headers and
227 long actual_register_packet_size;
229 /* This is the maximum size (in chars) of a non read/write packet.
230 It is also used as a cap on the size of read/write packets. */
231 long remote_packet_size;
235 /* Handle for retreving the remote protocol data from gdbarch. */
236 static struct gdbarch_data *remote_gdbarch_data_handle;
238 static struct remote_state *
239 get_remote_state (void)
241 return gdbarch_data (current_gdbarch, remote_gdbarch_data_handle);
245 init_remote_state (struct gdbarch *gdbarch)
248 struct remote_state *rs = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_state);
250 if (deprecated_register_bytes () != 0)
251 rs->sizeof_g_packet = deprecated_register_bytes ();
253 rs->sizeof_g_packet = 0;
255 /* Assume a 1:1 regnum<->pnum table. */
256 rs->regs = GDBARCH_OBSTACK_CALLOC (gdbarch, NUM_REGS + NUM_PSEUDO_REGS,
258 for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++)
260 struct packet_reg *r = &rs->regs[regnum];
263 r->offset = DEPRECATED_REGISTER_BYTE (regnum);
264 r->in_g_packet = (regnum < NUM_REGS);
265 /* ...name = REGISTER_NAME (regnum); */
267 /* Compute packet size by accumulating the size of all registers. */
268 if (deprecated_register_bytes () == 0)
269 rs->sizeof_g_packet += register_size (current_gdbarch, regnum);
272 /* Default maximum number of characters in a packet body. Many
273 remote stubs have a hardwired buffer size of 400 bytes
274 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
275 as the maximum packet-size to ensure that the packet and an extra
276 NUL character can always fit in the buffer. This stops GDB
277 trashing stubs that try to squeeze an extra NUL into what is
278 already a full buffer (As of 1999-12-04 that was most stubs. */
279 rs->remote_packet_size = 400 - 1;
281 /* Should rs->sizeof_g_packet needs more space than the
282 default, adjust the size accordingly. Remember that each byte is
283 encoded as two characters. 32 is the overhead for the packet
284 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
285 (``$NN:G...#NN'') is a better guess, the below has been padded a
287 if (rs->sizeof_g_packet > ((rs->remote_packet_size - 32) / 2))
288 rs->remote_packet_size = (rs->sizeof_g_packet * 2 + 32);
290 /* This one is filled in when a ``g'' packet is received. */
291 rs->actual_register_packet_size = 0;
296 static struct packet_reg *
297 packet_reg_from_regnum (struct remote_state *rs, long regnum)
299 if (regnum < 0 && regnum >= NUM_REGS + NUM_PSEUDO_REGS)
303 struct packet_reg *r = &rs->regs[regnum];
304 gdb_assert (r->regnum == regnum);
309 static struct packet_reg *
310 packet_reg_from_pnum (struct remote_state *rs, LONGEST pnum)
313 for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++)
315 struct packet_reg *r = &rs->regs[i];
322 /* FIXME: graces/2002-08-08: These variables should eventually be
323 bound to an instance of the target object (as in gdbarch-tdep()),
324 when such a thing exists. */
326 /* This is set to the data address of the access causing the target
327 to stop for a watchpoint. */
328 static CORE_ADDR remote_watch_data_address;
330 /* This is non-zero if taregt stopped for a watchpoint. */
331 static int remote_stopped_by_watchpoint_p;
334 static struct target_ops remote_ops;
336 static struct target_ops extended_remote_ops;
338 /* Temporary target ops. Just like the remote_ops and
339 extended_remote_ops, but with asynchronous support. */
340 static struct target_ops remote_async_ops;
342 static struct target_ops extended_async_remote_ops;
344 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
345 ``forever'' still use the normal timeout mechanism. This is
346 currently used by the ASYNC code to guarentee that target reads
347 during the initial connect always time-out. Once getpkt has been
348 modified to return a timeout indication and, in turn
349 remote_wait()/wait_for_inferior() have gained a timeout parameter
351 static int wait_forever_enabled_p = 1;
354 /* This variable chooses whether to send a ^C or a break when the user
355 requests program interruption. Although ^C is usually what remote
356 systems expect, and that is the default here, sometimes a break is
357 preferable instead. */
359 static int remote_break;
361 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
362 remote_open knows that we don't have a file open when the program
364 static struct serial *remote_desc = NULL;
366 /* This variable sets the number of bits in an address that are to be
367 sent in a memory ("M" or "m") packet. Normally, after stripping
368 leading zeros, the entire address would be sent. This variable
369 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
370 initial implementation of remote.c restricted the address sent in
371 memory packets to ``host::sizeof long'' bytes - (typically 32
372 bits). Consequently, for 64 bit targets, the upper 32 bits of an
373 address was never sent. Since fixing this bug may cause a break in
374 some remote targets this variable is principly provided to
375 facilitate backward compatibility. */
377 static int remote_address_size;
379 /* Tempoary to track who currently owns the terminal. See
380 target_async_terminal_* for more details. */
382 static int remote_async_terminal_ours_p;
385 /* User configurable variables for the number of characters in a
386 memory read/write packet. MIN ((rs->remote_packet_size),
387 rs->sizeof_g_packet) is the default. Some targets need smaller
388 values (fifo overruns, et.al.) and some users need larger values
389 (speed up transfers). The variables ``preferred_*'' (the user
390 request), ``current_*'' (what was actually set) and ``forced_*''
391 (Positive - a soft limit, negative - a hard limit). */
393 struct memory_packet_config
400 /* Compute the current size of a read/write packet. Since this makes
401 use of ``actual_register_packet_size'' the computation is dynamic. */
404 get_memory_packet_size (struct memory_packet_config *config)
406 struct remote_state *rs = get_remote_state ();
407 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
408 law?) that some hosts don't cope very well with large alloca()
409 calls. Eventually the alloca() code will be replaced by calls to
410 xmalloc() and make_cleanups() allowing this restriction to either
411 be lifted or removed. */
412 #ifndef MAX_REMOTE_PACKET_SIZE
413 #define MAX_REMOTE_PACKET_SIZE 16384
415 /* NOTE: 16 is just chosen at random. */
416 #ifndef MIN_REMOTE_PACKET_SIZE
417 #define MIN_REMOTE_PACKET_SIZE 16
422 if (config->size <= 0)
423 what_they_get = MAX_REMOTE_PACKET_SIZE;
425 what_they_get = config->size;
429 what_they_get = (rs->remote_packet_size);
430 /* Limit the packet to the size specified by the user. */
432 && what_they_get > config->size)
433 what_they_get = config->size;
434 /* Limit it to the size of the targets ``g'' response. */
435 if ((rs->actual_register_packet_size) > 0
436 && what_they_get > (rs->actual_register_packet_size))
437 what_they_get = (rs->actual_register_packet_size);
439 if (what_they_get > MAX_REMOTE_PACKET_SIZE)
440 what_they_get = MAX_REMOTE_PACKET_SIZE;
441 if (what_they_get < MIN_REMOTE_PACKET_SIZE)
442 what_they_get = MIN_REMOTE_PACKET_SIZE;
443 return what_they_get;
446 /* Update the size of a read/write packet. If they user wants
447 something really big then do a sanity check. */
450 set_memory_packet_size (char *args, struct memory_packet_config *config)
452 int fixed_p = config->fixed_p;
453 long size = config->size;
455 error ("Argument required (integer, `fixed' or `limited').");
456 else if (strcmp (args, "hard") == 0
457 || strcmp (args, "fixed") == 0)
459 else if (strcmp (args, "soft") == 0
460 || strcmp (args, "limit") == 0)
465 size = strtoul (args, &end, 0);
467 error ("Invalid %s (bad syntax).", config->name);
469 /* Instead of explicitly capping the size of a packet to
470 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
471 instead allowed to set the size to something arbitrarily
473 if (size > MAX_REMOTE_PACKET_SIZE)
474 error ("Invalid %s (too large).", config->name);
478 if (fixed_p && !config->fixed_p)
480 if (! query ("The target may not be able to correctly handle a %s\n"
481 "of %ld bytes. Change the packet size? ",
483 error ("Packet size not changed.");
485 /* Update the config. */
486 config->fixed_p = fixed_p;
491 show_memory_packet_size (struct memory_packet_config *config)
493 printf_filtered ("The %s is %ld. ", config->name, config->size);
495 printf_filtered ("Packets are fixed at %ld bytes.\n",
496 get_memory_packet_size (config));
498 printf_filtered ("Packets are limited to %ld bytes.\n",
499 get_memory_packet_size (config));
502 static struct memory_packet_config memory_write_packet_config =
504 "memory-write-packet-size",
508 set_memory_write_packet_size (char *args, int from_tty)
510 set_memory_packet_size (args, &memory_write_packet_config);
514 show_memory_write_packet_size (char *args, int from_tty)
516 show_memory_packet_size (&memory_write_packet_config);
520 get_memory_write_packet_size (void)
522 return get_memory_packet_size (&memory_write_packet_config);
525 static struct memory_packet_config memory_read_packet_config =
527 "memory-read-packet-size",
531 set_memory_read_packet_size (char *args, int from_tty)
533 set_memory_packet_size (args, &memory_read_packet_config);
537 show_memory_read_packet_size (char *args, int from_tty)
539 show_memory_packet_size (&memory_read_packet_config);
543 get_memory_read_packet_size (void)
545 struct remote_state *rs = get_remote_state ();
546 long size = get_memory_packet_size (&memory_read_packet_config);
547 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
548 extra buffer size argument before the memory read size can be
549 increased beyond (rs->remote_packet_size). */
550 if (size > (rs->remote_packet_size))
551 size = (rs->remote_packet_size);
556 /* Generic configuration support for packets the stub optionally
557 supports. Allows the user to specify the use of the packet as well
558 as allowing GDB to auto-detect support in the remote stub. */
562 PACKET_SUPPORT_UNKNOWN = 0,
571 enum auto_boolean detect;
572 enum packet_support support;
575 /* Analyze a packet's return value and update the packet config
586 update_packet_config (struct packet_config *config)
588 switch (config->detect)
590 case AUTO_BOOLEAN_TRUE:
591 config->support = PACKET_ENABLE;
593 case AUTO_BOOLEAN_FALSE:
594 config->support = PACKET_DISABLE;
596 case AUTO_BOOLEAN_AUTO:
597 config->support = PACKET_SUPPORT_UNKNOWN;
603 show_packet_config_cmd (struct packet_config *config)
605 char *support = "internal-error";
606 switch (config->support)
612 support = "disabled";
614 case PACKET_SUPPORT_UNKNOWN:
618 switch (config->detect)
620 case AUTO_BOOLEAN_AUTO:
621 printf_filtered ("Support for remote protocol `%s' (%s) packet is auto-detected, currently %s.\n",
622 config->name, config->title, support);
624 case AUTO_BOOLEAN_TRUE:
625 case AUTO_BOOLEAN_FALSE:
626 printf_filtered ("Support for remote protocol `%s' (%s) packet is currently %s.\n",
627 config->name, config->title, support);
633 add_packet_config_cmd (struct packet_config *config,
636 cmd_sfunc_ftype *set_func,
637 cmd_sfunc_ftype *show_func,
638 struct cmd_list_element **set_remote_list,
639 struct cmd_list_element **show_remote_list,
642 struct cmd_list_element *set_cmd;
643 struct cmd_list_element *show_cmd;
650 config->title = title;
651 config->detect = AUTO_BOOLEAN_AUTO;
652 config->support = PACKET_SUPPORT_UNKNOWN;
653 set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet",
655 show_doc = xstrprintf ("Show current use of remote protocol `%s' (%s) packet",
657 print = xstrprintf ("Current use of remote protocol `%s' (%s) is %%s",
659 /* set/show TITLE-packet {auto,on,off} */
660 cmd_name = xstrprintf ("%s-packet", title);
661 add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
662 &config->detect, set_doc, show_doc,
665 set_remote_list, show_remote_list);
666 /* set/show remote NAME-packet {auto,on,off} -- legacy */
670 legacy_name = xstrprintf ("%s-packet", name);
671 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
673 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
678 static enum packet_result
679 packet_ok (const char *buf, struct packet_config *config)
683 /* The stub recognized the packet request. Check that the
684 operation succeeded. */
685 switch (config->support)
687 case PACKET_SUPPORT_UNKNOWN:
689 fprintf_unfiltered (gdb_stdlog,
690 "Packet %s (%s) is supported\n",
691 config->name, config->title);
692 config->support = PACKET_ENABLE;
695 internal_error (__FILE__, __LINE__,
696 "packet_ok: attempt to use a disabled packet");
701 if (buf[0] == 'O' && buf[1] == 'K' && buf[2] == '\0')
702 /* "OK" - definitly OK. */
705 && isxdigit (buf[1]) && isxdigit (buf[2])
707 /* "Enn" - definitly an error. */
709 /* The packet may or may not be OK. Just assume it is */
714 /* The stub does not support the packet. */
715 switch (config->support)
718 if (config->detect == AUTO_BOOLEAN_AUTO)
719 /* If the stub previously indicated that the packet was
720 supported then there is a protocol error.. */
721 error ("Protocol error: %s (%s) conflicting enabled responses.",
722 config->name, config->title);
724 /* The user set it wrong. */
725 error ("Enabled packet %s (%s) not recognized by stub",
726 config->name, config->title);
728 case PACKET_SUPPORT_UNKNOWN:
730 fprintf_unfiltered (gdb_stdlog,
731 "Packet %s (%s) is NOT supported\n",
732 config->name, config->title);
733 config->support = PACKET_DISABLE;
738 return PACKET_UNKNOWN;
742 /* Should we try the 'vCont' (descriptive resume) request? */
743 static struct packet_config remote_protocol_vcont;
746 set_remote_protocol_vcont_packet_cmd (char *args, int from_tty,
747 struct cmd_list_element *c)
749 update_packet_config (&remote_protocol_vcont);
753 show_remote_protocol_vcont_packet_cmd (char *args, int from_tty,
754 struct cmd_list_element *c)
756 show_packet_config_cmd (&remote_protocol_vcont);
759 /* Should we try the 'qSymbol' (target symbol lookup service) request? */
760 static struct packet_config remote_protocol_qSymbol;
763 set_remote_protocol_qSymbol_packet_cmd (char *args, int from_tty,
764 struct cmd_list_element *c)
766 update_packet_config (&remote_protocol_qSymbol);
770 show_remote_protocol_qSymbol_packet_cmd (char *args, int from_tty,
771 struct cmd_list_element *c)
773 show_packet_config_cmd (&remote_protocol_qSymbol);
776 /* Should we try the 'P' (set register) request? */
778 static struct packet_config remote_protocol_P;
781 set_remote_protocol_P_packet_cmd (char *args, int from_tty,
782 struct cmd_list_element *c)
784 update_packet_config (&remote_protocol_P);
788 show_remote_protocol_P_packet_cmd (char *args, int from_tty,
789 struct cmd_list_element *c)
791 show_packet_config_cmd (&remote_protocol_P);
794 /* Should we try one of the 'Z' requests? */
798 Z_PACKET_SOFTWARE_BP,
799 Z_PACKET_HARDWARE_BP,
806 static struct packet_config remote_protocol_Z[NR_Z_PACKET_TYPES];
808 /* FIXME: Instead of having all these boiler plate functions, the
809 command callback should include a context argument. */
812 set_remote_protocol_Z_software_bp_packet_cmd (char *args, int from_tty,
813 struct cmd_list_element *c)
815 update_packet_config (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP]);
819 show_remote_protocol_Z_software_bp_packet_cmd (char *args, int from_tty,
820 struct cmd_list_element *c)
822 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP]);
826 set_remote_protocol_Z_hardware_bp_packet_cmd (char *args, int from_tty,
827 struct cmd_list_element *c)
829 update_packet_config (&remote_protocol_Z[Z_PACKET_HARDWARE_BP]);
833 show_remote_protocol_Z_hardware_bp_packet_cmd (char *args, int from_tty,
834 struct cmd_list_element *c)
836 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_HARDWARE_BP]);
840 set_remote_protocol_Z_write_wp_packet_cmd (char *args, int from_tty,
841 struct cmd_list_element *c)
843 update_packet_config (&remote_protocol_Z[Z_PACKET_WRITE_WP]);
847 show_remote_protocol_Z_write_wp_packet_cmd (char *args, int from_tty,
848 struct cmd_list_element *c)
850 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_WRITE_WP]);
854 set_remote_protocol_Z_read_wp_packet_cmd (char *args, int from_tty,
855 struct cmd_list_element *c)
857 update_packet_config (&remote_protocol_Z[Z_PACKET_READ_WP]);
861 show_remote_protocol_Z_read_wp_packet_cmd (char *args, int from_tty,
862 struct cmd_list_element *c)
864 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_READ_WP]);
868 set_remote_protocol_Z_access_wp_packet_cmd (char *args, int from_tty,
869 struct cmd_list_element *c)
871 update_packet_config (&remote_protocol_Z[Z_PACKET_ACCESS_WP]);
875 show_remote_protocol_Z_access_wp_packet_cmd (char *args, int from_tty,
876 struct cmd_list_element *c)
878 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_ACCESS_WP]);
881 /* For compatibility with older distributions. Provide a ``set remote
882 Z-packet ...'' command that updates all the Z packet types. */
884 static enum auto_boolean remote_Z_packet_detect;
887 set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
888 struct cmd_list_element *c)
891 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
893 remote_protocol_Z[i].detect = remote_Z_packet_detect;
894 update_packet_config (&remote_protocol_Z[i]);
899 show_remote_protocol_Z_packet_cmd (char *args, int from_tty,
900 struct cmd_list_element *c)
903 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
905 show_packet_config_cmd (&remote_protocol_Z[i]);
909 /* Should we try the 'X' (remote binary download) packet?
911 This variable (available to the user via "set remote X-packet")
912 dictates whether downloads are sent in binary (via the 'X' packet).
913 We assume that the stub can, and attempt to do it. This will be
914 cleared if the stub does not understand it. This switch is still
915 needed, though in cases when the packet is supported in the stub,
916 but the connection does not allow it (i.e., 7-bit serial connection
919 static struct packet_config remote_protocol_binary_download;
921 /* Should we try the 'ThreadInfo' query packet?
923 This variable (NOT available to the user: auto-detect only!)
924 determines whether GDB will use the new, simpler "ThreadInfo"
925 query or the older, more complex syntax for thread queries.
926 This is an auto-detect variable (set to true at each connect,
927 and set to false when the target fails to recognize it). */
929 static int use_threadinfo_query;
930 static int use_threadextra_query;
933 set_remote_protocol_binary_download_cmd (char *args,
935 struct cmd_list_element *c)
937 update_packet_config (&remote_protocol_binary_download);
941 show_remote_protocol_binary_download_cmd (char *args, int from_tty,
942 struct cmd_list_element *c)
944 show_packet_config_cmd (&remote_protocol_binary_download);
947 /* Should we try the 'qPart:auxv' (target auxiliary vector read) request? */
948 static struct packet_config remote_protocol_qPart_auxv;
951 set_remote_protocol_qPart_auxv_packet_cmd (char *args, int from_tty,
952 struct cmd_list_element *c)
954 update_packet_config (&remote_protocol_qPart_auxv);
958 show_remote_protocol_qPart_auxv_packet_cmd (char *args, int from_tty,
959 struct cmd_list_element *c)
961 show_packet_config_cmd (&remote_protocol_qPart_auxv);
964 static struct packet_config remote_protocol_p;
967 set_remote_protocol_p_packet_cmd (char *args, int from_tty,
968 struct cmd_list_element *c)
970 update_packet_config (&remote_protocol_p);
974 show_remote_protocol_p_packet_cmd (char *args, int from_tty,
975 struct cmd_list_element *c)
977 show_packet_config_cmd (&remote_protocol_p);
982 /* Tokens for use by the asynchronous signal handlers for SIGINT */
983 static void *sigint_remote_twice_token;
984 static void *sigint_remote_token;
986 /* These are pointers to hook functions that may be set in order to
987 modify resume/wait behavior for a particular architecture. */
989 void (*deprecated_target_resume_hook) (void);
990 void (*deprecated_target_wait_loop_hook) (void);
994 /* These are the threads which we last sent to the remote system.
995 -1 for all or -2 for not sent yet. */
996 static int general_thread;
997 static int continue_thread;
999 /* Call this function as a result of
1000 1) A halt indication (T packet) containing a thread id
1001 2) A direct query of currthread
1002 3) Successful execution of set thread
1006 record_currthread (int currthread)
1008 general_thread = currthread;
1010 /* If this is a new thread, add it to GDB's thread list.
1011 If we leave it up to WFI to do this, bad things will happen. */
1012 if (!in_thread_list (pid_to_ptid (currthread)))
1014 add_thread (pid_to_ptid (currthread));
1015 ui_out_text (uiout, "[New ");
1016 ui_out_text (uiout, target_pid_to_str (pid_to_ptid (currthread)));
1017 ui_out_text (uiout, "]\n");
1021 #define MAGIC_NULL_PID 42000
1024 set_thread (int th, int gen)
1026 struct remote_state *rs = get_remote_state ();
1027 char *buf = alloca (rs->remote_packet_size);
1028 int state = gen ? general_thread : continue_thread;
1034 buf[1] = gen ? 'g' : 'c';
1035 if (th == MAGIC_NULL_PID)
1041 sprintf (&buf[2], "-%x", -th);
1043 sprintf (&buf[2], "%x", th);
1045 getpkt (buf, (rs->remote_packet_size), 0);
1047 general_thread = th;
1049 continue_thread = th;
1052 /* Return nonzero if the thread TH is still alive on the remote system. */
1055 remote_thread_alive (ptid_t ptid)
1057 int tid = PIDGET (ptid);
1061 sprintf (buf, "T-%08x", -tid);
1063 sprintf (buf, "T%08x", tid);
1065 getpkt (buf, sizeof (buf), 0);
1066 return (buf[0] == 'O' && buf[1] == 'K');
1069 /* About these extended threadlist and threadinfo packets. They are
1070 variable length packets but, the fields within them are often fixed
1071 length. They are redundent enough to send over UDP as is the
1072 remote protocol in general. There is a matching unit test module
1075 #define OPAQUETHREADBYTES 8
1077 /* a 64 bit opaque identifier */
1078 typedef unsigned char threadref[OPAQUETHREADBYTES];
1080 /* WARNING: This threadref data structure comes from the remote O.S., libstub
1081 protocol encoding, and remote.c. it is not particularly changable */
1083 /* Right now, the internal structure is int. We want it to be bigger.
1087 typedef int gdb_threadref; /* internal GDB thread reference */
1089 /* gdb_ext_thread_info is an internal GDB data structure which is
1090 equivalint to the reply of the remote threadinfo packet */
1092 struct gdb_ext_thread_info
1094 threadref threadid; /* External form of thread reference */
1095 int active; /* Has state interesting to GDB? , regs, stack */
1096 char display[256]; /* Brief state display, name, blocked/syspended */
1097 char shortname[32]; /* To be used to name threads */
1098 char more_display[256]; /* Long info, statistics, queue depth, whatever */
1101 /* The volume of remote transfers can be limited by submitting
1102 a mask containing bits specifying the desired information.
1103 Use a union of these values as the 'selection' parameter to
1104 get_thread_info. FIXME: Make these TAG names more thread specific.
1107 #define TAG_THREADID 1
1108 #define TAG_EXISTS 2
1109 #define TAG_DISPLAY 4
1110 #define TAG_THREADNAME 8
1111 #define TAG_MOREDISPLAY 16
1113 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES*2)
1115 char *unpack_varlen_hex (char *buff, ULONGEST *result);
1117 static char *unpack_nibble (char *buf, int *val);
1119 static char *pack_nibble (char *buf, int nibble);
1121 static char *pack_hex_byte (char *pkt, int /*unsigned char */ byte);
1123 static char *unpack_byte (char *buf, int *value);
1125 static char *pack_int (char *buf, int value);
1127 static char *unpack_int (char *buf, int *value);
1129 static char *unpack_string (char *src, char *dest, int length);
1131 static char *pack_threadid (char *pkt, threadref * id);
1133 static char *unpack_threadid (char *inbuf, threadref * id);
1135 void int_to_threadref (threadref * id, int value);
1137 static int threadref_to_int (threadref * ref);
1139 static void copy_threadref (threadref * dest, threadref * src);
1141 static int threadmatch (threadref * dest, threadref * src);
1143 static char *pack_threadinfo_request (char *pkt, int mode, threadref * id);
1145 static int remote_unpack_thread_info_response (char *pkt,
1146 threadref * expectedref,
1147 struct gdb_ext_thread_info
1151 static int remote_get_threadinfo (threadref * threadid, int fieldset, /*TAG mask */
1152 struct gdb_ext_thread_info *info);
1154 static char *pack_threadlist_request (char *pkt, int startflag,
1156 threadref * nextthread);
1158 static int parse_threadlist_response (char *pkt,
1160 threadref * original_echo,
1161 threadref * resultlist, int *doneflag);
1163 static int remote_get_threadlist (int startflag,
1164 threadref * nextthread,
1167 int *result_count, threadref * threadlist);
1169 typedef int (*rmt_thread_action) (threadref * ref, void *context);
1171 static int remote_threadlist_iterator (rmt_thread_action stepfunction,
1172 void *context, int looplimit);
1174 static int remote_newthread_step (threadref * ref, void *context);
1176 /* encode 64 bits in 16 chars of hex */
1178 static const char hexchars[] = "0123456789abcdef";
1181 ishex (int ch, int *val)
1183 if ((ch >= 'a') && (ch <= 'f'))
1185 *val = ch - 'a' + 10;
1188 if ((ch >= 'A') && (ch <= 'F'))
1190 *val = ch - 'A' + 10;
1193 if ((ch >= '0') && (ch <= '9'))
1204 if (ch >= 'a' && ch <= 'f')
1205 return ch - 'a' + 10;
1206 if (ch >= '0' && ch <= '9')
1208 if (ch >= 'A' && ch <= 'F')
1209 return ch - 'A' + 10;
1214 stub_unpack_int (char *buff, int fieldlength)
1221 nibble = stubhex (*buff++);
1225 retval = retval << 4;
1231 unpack_varlen_hex (char *buff, /* packet to parse */
1237 while (ishex (*buff, &nibble))
1240 retval = retval << 4;
1241 retval |= nibble & 0x0f;
1248 unpack_nibble (char *buf, int *val)
1250 ishex (*buf++, val);
1255 pack_nibble (char *buf, int nibble)
1257 *buf++ = hexchars[(nibble & 0x0f)];
1262 pack_hex_byte (char *pkt, int byte)
1264 *pkt++ = hexchars[(byte >> 4) & 0xf];
1265 *pkt++ = hexchars[(byte & 0xf)];
1270 unpack_byte (char *buf, int *value)
1272 *value = stub_unpack_int (buf, 2);
1277 pack_int (char *buf, int value)
1279 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
1280 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
1281 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
1282 buf = pack_hex_byte (buf, (value & 0xff));
1287 unpack_int (char *buf, int *value)
1289 *value = stub_unpack_int (buf, 8);
1293 #if 0 /* currently unused, uncomment when needed */
1294 static char *pack_string (char *pkt, char *string);
1297 pack_string (char *pkt, char *string)
1302 len = strlen (string);
1304 len = 200; /* Bigger than most GDB packets, junk??? */
1305 pkt = pack_hex_byte (pkt, len);
1309 if ((ch == '\0') || (ch == '#'))
1310 ch = '*'; /* Protect encapsulation */
1315 #endif /* 0 (unused) */
1318 unpack_string (char *src, char *dest, int length)
1327 pack_threadid (char *pkt, threadref *id)
1330 unsigned char *altid;
1332 altid = (unsigned char *) id;
1333 limit = pkt + BUF_THREAD_ID_SIZE;
1335 pkt = pack_hex_byte (pkt, *altid++);
1341 unpack_threadid (char *inbuf, threadref *id)
1344 char *limit = inbuf + BUF_THREAD_ID_SIZE;
1347 altref = (char *) id;
1349 while (inbuf < limit)
1351 x = stubhex (*inbuf++);
1352 y = stubhex (*inbuf++);
1353 *altref++ = (x << 4) | y;
1358 /* Externally, threadrefs are 64 bits but internally, they are still
1359 ints. This is due to a mismatch of specifications. We would like
1360 to use 64bit thread references internally. This is an adapter
1364 int_to_threadref (threadref *id, int value)
1366 unsigned char *scan;
1368 scan = (unsigned char *) id;
1374 *scan++ = (value >> 24) & 0xff;
1375 *scan++ = (value >> 16) & 0xff;
1376 *scan++ = (value >> 8) & 0xff;
1377 *scan++ = (value & 0xff);
1381 threadref_to_int (threadref *ref)
1384 unsigned char *scan;
1386 scan = (char *) ref;
1390 value = (value << 8) | ((*scan++) & 0xff);
1395 copy_threadref (threadref *dest, threadref *src)
1398 unsigned char *csrc, *cdest;
1400 csrc = (unsigned char *) src;
1401 cdest = (unsigned char *) dest;
1408 threadmatch (threadref *dest, threadref *src)
1410 /* things are broken right now, so just assume we got a match */
1412 unsigned char *srcp, *destp;
1414 srcp = (char *) src;
1415 destp = (char *) dest;
1419 result &= (*srcp++ == *destp++) ? 1 : 0;
1426 threadid:1, # always request threadid
1433 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1436 pack_threadinfo_request (char *pkt, int mode, threadref *id)
1438 *pkt++ = 'q'; /* Info Query */
1439 *pkt++ = 'P'; /* process or thread info */
1440 pkt = pack_int (pkt, mode); /* mode */
1441 pkt = pack_threadid (pkt, id); /* threadid */
1442 *pkt = '\0'; /* terminate */
1446 /* These values tag the fields in a thread info response packet */
1447 /* Tagging the fields allows us to request specific fields and to
1448 add more fields as time goes by */
1450 #define TAG_THREADID 1 /* Echo the thread identifier */
1451 #define TAG_EXISTS 2 /* Is this process defined enough to
1452 fetch registers and its stack */
1453 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1454 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is */
1455 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1459 remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
1460 struct gdb_ext_thread_info *info)
1462 struct remote_state *rs = get_remote_state ();
1466 char *limit = pkt + (rs->remote_packet_size); /* plausable parsing limit */
1469 /* info->threadid = 0; FIXME: implement zero_threadref */
1471 info->display[0] = '\0';
1472 info->shortname[0] = '\0';
1473 info->more_display[0] = '\0';
1475 /* Assume the characters indicating the packet type have been stripped */
1476 pkt = unpack_int (pkt, &mask); /* arg mask */
1477 pkt = unpack_threadid (pkt, &ref);
1480 warning ("Incomplete response to threadinfo request\n");
1481 if (!threadmatch (&ref, expectedref))
1482 { /* This is an answer to a different request */
1483 warning ("ERROR RMT Thread info mismatch\n");
1486 copy_threadref (&info->threadid, &ref);
1488 /* Loop on tagged fields , try to bail if somthing goes wrong */
1490 while ((pkt < limit) && mask && *pkt) /* packets are terminated with nulls */
1492 pkt = unpack_int (pkt, &tag); /* tag */
1493 pkt = unpack_byte (pkt, &length); /* length */
1494 if (!(tag & mask)) /* tags out of synch with mask */
1496 warning ("ERROR RMT: threadinfo tag mismatch\n");
1500 if (tag == TAG_THREADID)
1504 warning ("ERROR RMT: length of threadid is not 16\n");
1508 pkt = unpack_threadid (pkt, &ref);
1509 mask = mask & ~TAG_THREADID;
1512 if (tag == TAG_EXISTS)
1514 info->active = stub_unpack_int (pkt, length);
1516 mask = mask & ~(TAG_EXISTS);
1519 warning ("ERROR RMT: 'exists' length too long\n");
1525 if (tag == TAG_THREADNAME)
1527 pkt = unpack_string (pkt, &info->shortname[0], length);
1528 mask = mask & ~TAG_THREADNAME;
1531 if (tag == TAG_DISPLAY)
1533 pkt = unpack_string (pkt, &info->display[0], length);
1534 mask = mask & ~TAG_DISPLAY;
1537 if (tag == TAG_MOREDISPLAY)
1539 pkt = unpack_string (pkt, &info->more_display[0], length);
1540 mask = mask & ~TAG_MOREDISPLAY;
1543 warning ("ERROR RMT: unknown thread info tag\n");
1544 break; /* Not a tag we know about */
1550 remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
1551 struct gdb_ext_thread_info *info)
1553 struct remote_state *rs = get_remote_state ();
1555 char *threadinfo_pkt = alloca (rs->remote_packet_size);
1557 pack_threadinfo_request (threadinfo_pkt, fieldset, threadid);
1558 putpkt (threadinfo_pkt);
1559 getpkt (threadinfo_pkt, (rs->remote_packet_size), 0);
1560 result = remote_unpack_thread_info_response (threadinfo_pkt + 2, threadid,
1565 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1568 pack_threadlist_request (char *pkt, int startflag, int threadcount,
1569 threadref *nextthread)
1571 *pkt++ = 'q'; /* info query packet */
1572 *pkt++ = 'L'; /* Process LIST or threadLIST request */
1573 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
1574 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
1575 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
1580 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1583 parse_threadlist_response (char *pkt, int result_limit,
1584 threadref *original_echo, threadref *resultlist,
1587 struct remote_state *rs = get_remote_state ();
1589 int count, resultcount, done;
1592 /* Assume the 'q' and 'M chars have been stripped. */
1593 limit = pkt + ((rs->remote_packet_size) - BUF_THREAD_ID_SIZE); /* done parse past here */
1594 pkt = unpack_byte (pkt, &count); /* count field */
1595 pkt = unpack_nibble (pkt, &done);
1596 /* The first threadid is the argument threadid. */
1597 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
1598 while ((count-- > 0) && (pkt < limit))
1600 pkt = unpack_threadid (pkt, resultlist++);
1601 if (resultcount++ >= result_limit)
1610 remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
1611 int *done, int *result_count, threadref *threadlist)
1613 struct remote_state *rs = get_remote_state ();
1614 static threadref echo_nextthread;
1615 char *threadlist_packet = alloca (rs->remote_packet_size);
1616 char *t_response = alloca (rs->remote_packet_size);
1619 /* Trancate result limit to be smaller than the packet size */
1620 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= (rs->remote_packet_size))
1621 result_limit = ((rs->remote_packet_size) / BUF_THREAD_ID_SIZE) - 2;
1623 pack_threadlist_request (threadlist_packet,
1624 startflag, result_limit, nextthread);
1625 putpkt (threadlist_packet);
1626 getpkt (t_response, (rs->remote_packet_size), 0);
1629 parse_threadlist_response (t_response + 2, result_limit, &echo_nextthread,
1632 if (!threadmatch (&echo_nextthread, nextthread))
1634 /* FIXME: This is a good reason to drop the packet */
1635 /* Possably, there is a duplicate response */
1637 retransmit immediatly - race conditions
1638 retransmit after timeout - yes
1640 wait for packet, then exit
1642 warning ("HMM: threadlist did not echo arg thread, dropping it\n");
1643 return 0; /* I choose simply exiting */
1645 if (*result_count <= 0)
1649 warning ("RMT ERROR : failed to get remote thread list\n");
1652 return result; /* break; */
1654 if (*result_count > result_limit)
1657 warning ("RMT ERROR: threadlist response longer than requested\n");
1663 /* This is the interface between remote and threads, remotes upper interface */
1665 /* remote_find_new_threads retrieves the thread list and for each
1666 thread in the list, looks up the thread in GDB's internal list,
1667 ading the thread if it does not already exist. This involves
1668 getting partial thread lists from the remote target so, polling the
1669 quit_flag is required. */
1672 /* About this many threadisds fit in a packet. */
1674 #define MAXTHREADLISTRESULTS 32
1677 remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
1680 int done, i, result_count;
1684 static threadref nextthread;
1685 static threadref resultthreadlist[MAXTHREADLISTRESULTS];
1690 if (loopcount++ > looplimit)
1693 warning ("Remote fetch threadlist -infinite loop-\n");
1696 if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS,
1697 &done, &result_count, resultthreadlist))
1702 /* clear for later iterations */
1704 /* Setup to resume next batch of thread references, set nextthread. */
1705 if (result_count >= 1)
1706 copy_threadref (&nextthread, &resultthreadlist[result_count - 1]);
1708 while (result_count--)
1709 if (!(result = (*stepfunction) (&resultthreadlist[i++], context)))
1716 remote_newthread_step (threadref *ref, void *context)
1720 ptid = pid_to_ptid (threadref_to_int (ref));
1722 if (!in_thread_list (ptid))
1724 return 1; /* continue iterator */
1727 #define CRAZY_MAX_THREADS 1000
1730 remote_current_thread (ptid_t oldpid)
1732 struct remote_state *rs = get_remote_state ();
1733 char *buf = alloca (rs->remote_packet_size);
1736 getpkt (buf, (rs->remote_packet_size), 0);
1737 if (buf[0] == 'Q' && buf[1] == 'C')
1738 /* Use strtoul here, so we'll correctly parse values whose highest
1739 bit is set. The protocol carries them as a simple series of
1740 hex digits; in the absence of a sign, strtol will see such
1741 values as positive numbers out of range for signed 'long', and
1742 return LONG_MAX to indicate an overflow. */
1743 return pid_to_ptid (strtoul (&buf[2], NULL, 16));
1748 /* Find new threads for info threads command.
1749 * Original version, using John Metzler's thread protocol.
1753 remote_find_new_threads (void)
1755 remote_threadlist_iterator (remote_newthread_step, 0,
1757 if (PIDGET (inferior_ptid) == MAGIC_NULL_PID) /* ack ack ack */
1758 inferior_ptid = remote_current_thread (inferior_ptid);
1762 * Find all threads for info threads command.
1763 * Uses new thread protocol contributed by Cisco.
1764 * Falls back and attempts to use the older method (above)
1765 * if the target doesn't respond to the new method.
1769 remote_threads_info (void)
1771 struct remote_state *rs = get_remote_state ();
1772 char *buf = alloca (rs->remote_packet_size);
1776 if (remote_desc == 0) /* paranoia */
1777 error ("Command can only be used when connected to the remote target.");
1779 if (use_threadinfo_query)
1781 putpkt ("qfThreadInfo");
1783 getpkt (bufp, (rs->remote_packet_size), 0);
1784 if (bufp[0] != '\0') /* q packet recognized */
1786 while (*bufp++ == 'm') /* reply contains one or more TID */
1790 /* Use strtoul here, so we'll correctly parse values
1791 whose highest bit is set. The protocol carries
1792 them as a simple series of hex digits; in the
1793 absence of a sign, strtol will see such values as
1794 positive numbers out of range for signed 'long',
1795 and return LONG_MAX to indicate an overflow. */
1796 tid = strtoul (bufp, &bufp, 16);
1797 if (tid != 0 && !in_thread_list (pid_to_ptid (tid)))
1798 add_thread (pid_to_ptid (tid));
1800 while (*bufp++ == ','); /* comma-separated list */
1801 putpkt ("qsThreadInfo");
1803 getpkt (bufp, (rs->remote_packet_size), 0);
1809 /* Else fall back to old method based on jmetzler protocol. */
1810 use_threadinfo_query = 0;
1811 remote_find_new_threads ();
1816 * Collect a descriptive string about the given thread.
1817 * The target may say anything it wants to about the thread
1818 * (typically info about its blocked / runnable state, name, etc.).
1819 * This string will appear in the info threads display.
1821 * Optional: targets are not required to implement this function.
1825 remote_threads_extra_info (struct thread_info *tp)
1827 struct remote_state *rs = get_remote_state ();
1831 struct gdb_ext_thread_info threadinfo;
1832 static char display_buf[100]; /* arbitrary... */
1833 char *bufp = alloca (rs->remote_packet_size);
1834 int n = 0; /* position in display_buf */
1836 if (remote_desc == 0) /* paranoia */
1837 internal_error (__FILE__, __LINE__,
1838 "remote_threads_extra_info");
1840 if (use_threadextra_query)
1842 sprintf (bufp, "qThreadExtraInfo,%x", PIDGET (tp->ptid));
1844 getpkt (bufp, (rs->remote_packet_size), 0);
1847 n = min (strlen (bufp) / 2, sizeof (display_buf));
1848 result = hex2bin (bufp, display_buf, n);
1849 display_buf [result] = '\0';
1854 /* If the above query fails, fall back to the old method. */
1855 use_threadextra_query = 0;
1856 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
1857 | TAG_MOREDISPLAY | TAG_DISPLAY;
1858 int_to_threadref (&id, PIDGET (tp->ptid));
1859 if (remote_get_threadinfo (&id, set, &threadinfo))
1860 if (threadinfo.active)
1862 if (*threadinfo.shortname)
1863 n += sprintf(&display_buf[0], " Name: %s,", threadinfo.shortname);
1864 if (*threadinfo.display)
1865 n += sprintf(&display_buf[n], " State: %s,", threadinfo.display);
1866 if (*threadinfo.more_display)
1867 n += sprintf(&display_buf[n], " Priority: %s",
1868 threadinfo.more_display);
1872 /* for purely cosmetic reasons, clear up trailing commas */
1873 if (',' == display_buf[n-1])
1874 display_buf[n-1] = ' ';
1883 /* Restart the remote side; this is an extended protocol operation. */
1886 extended_remote_restart (void)
1888 struct remote_state *rs = get_remote_state ();
1889 char *buf = alloca (rs->remote_packet_size);
1891 /* Send the restart command; for reasons I don't understand the
1892 remote side really expects a number after the "R". */
1894 sprintf (&buf[1], "%x", 0);
1897 /* Now query for status so this looks just like we restarted
1898 gdbserver from scratch. */
1900 getpkt (buf, (rs->remote_packet_size), 0);
1903 /* Clean up connection to a remote debugger. */
1906 remote_close (int quitting)
1909 serial_close (remote_desc);
1913 /* Query the remote side for the text, data and bss offsets. */
1918 struct remote_state *rs = get_remote_state ();
1919 char *buf = alloca (rs->remote_packet_size);
1922 CORE_ADDR text_addr, data_addr, bss_addr;
1923 struct section_offsets *offs;
1925 putpkt ("qOffsets");
1927 getpkt (buf, (rs->remote_packet_size), 0);
1929 if (buf[0] == '\000')
1930 return; /* Return silently. Stub doesn't support
1934 warning ("Remote failure reply: %s", buf);
1938 /* Pick up each field in turn. This used to be done with scanf, but
1939 scanf will make trouble if CORE_ADDR size doesn't match
1940 conversion directives correctly. The following code will work
1941 with any size of CORE_ADDR. */
1942 text_addr = data_addr = bss_addr = 0;
1946 if (strncmp (ptr, "Text=", 5) == 0)
1949 /* Don't use strtol, could lose on big values. */
1950 while (*ptr && *ptr != ';')
1951 text_addr = (text_addr << 4) + fromhex (*ptr++);
1956 if (!lose && strncmp (ptr, ";Data=", 6) == 0)
1959 while (*ptr && *ptr != ';')
1960 data_addr = (data_addr << 4) + fromhex (*ptr++);
1965 if (!lose && strncmp (ptr, ";Bss=", 5) == 0)
1968 while (*ptr && *ptr != ';')
1969 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
1975 error ("Malformed response to offset query, %s", buf);
1977 if (symfile_objfile == NULL)
1980 offs = ((struct section_offsets *)
1981 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
1982 memcpy (offs, symfile_objfile->section_offsets,
1983 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
1985 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
1987 /* This is a temporary kludge to force data and bss to use the same offsets
1988 because that's what nlmconv does now. The real solution requires changes
1989 to the stub and remote.c that I don't have time to do right now. */
1991 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
1992 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
1994 objfile_relocate (symfile_objfile, offs);
1997 /* Stub for catch_errors. */
2000 remote_start_remote_dummy (struct ui_out *uiout, void *dummy)
2002 start_remote (); /* Initialize gdb process mechanisms */
2003 /* NOTE: Return something >=0. A -ve value is reserved for
2004 catch_exceptions. */
2009 remote_start_remote (struct ui_out *uiout, void *dummy)
2011 immediate_quit++; /* Allow user to interrupt it */
2013 /* Ack any packet which the remote side has already sent. */
2014 serial_write (remote_desc, "+", 1);
2016 /* Let the stub know that we want it to return the thread. */
2019 inferior_ptid = remote_current_thread (inferior_ptid);
2021 get_offsets (); /* Get text, data & bss offsets */
2023 putpkt ("?"); /* initiate a query from remote machine */
2026 /* NOTE: See comment above in remote_start_remote_dummy(). This
2027 function returns something >=0. */
2028 return remote_start_remote_dummy (uiout, dummy);
2031 /* Open a connection to a remote debugger.
2032 NAME is the filename used for communication. */
2035 remote_open (char *name, int from_tty)
2037 remote_open_1 (name, from_tty, &remote_ops, 0, 0);
2040 /* Just like remote_open, but with asynchronous support. */
2042 remote_async_open (char *name, int from_tty)
2044 remote_open_1 (name, from_tty, &remote_async_ops, 0, 1);
2047 /* Open a connection to a remote debugger using the extended
2048 remote gdb protocol. NAME is the filename used for communication. */
2051 extended_remote_open (char *name, int from_tty)
2053 remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */,
2057 /* Just like extended_remote_open, but with asynchronous support. */
2059 extended_remote_async_open (char *name, int from_tty)
2061 remote_open_1 (name, from_tty, &extended_async_remote_ops,
2062 1 /*extended_p */, 1 /* async_p */);
2065 /* Generic code for opening a connection to a remote target. */
2068 init_all_packet_configs (void)
2071 update_packet_config (&remote_protocol_P);
2072 update_packet_config (&remote_protocol_p);
2073 update_packet_config (&remote_protocol_qSymbol);
2074 update_packet_config (&remote_protocol_vcont);
2075 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
2076 update_packet_config (&remote_protocol_Z[i]);
2077 /* Force remote_write_bytes to check whether target supports binary
2079 update_packet_config (&remote_protocol_binary_download);
2080 update_packet_config (&remote_protocol_qPart_auxv);
2083 /* Symbol look-up. */
2086 remote_check_symbols (struct objfile *objfile)
2088 struct remote_state *rs = get_remote_state ();
2089 char *msg, *reply, *tmp;
2090 struct minimal_symbol *sym;
2093 if (remote_protocol_qSymbol.support == PACKET_DISABLE)
2096 msg = alloca (rs->remote_packet_size);
2097 reply = alloca (rs->remote_packet_size);
2099 /* Invite target to request symbol lookups. */
2101 putpkt ("qSymbol::");
2102 getpkt (reply, (rs->remote_packet_size), 0);
2103 packet_ok (reply, &remote_protocol_qSymbol);
2105 while (strncmp (reply, "qSymbol:", 8) == 0)
2108 end = hex2bin (tmp, msg, strlen (tmp) / 2);
2110 sym = lookup_minimal_symbol (msg, NULL, NULL);
2112 sprintf (msg, "qSymbol::%s", &reply[8]);
2114 sprintf (msg, "qSymbol:%s:%s",
2115 paddr_nz (SYMBOL_VALUE_ADDRESS (sym)),
2118 getpkt (reply, (rs->remote_packet_size), 0);
2122 static struct serial *
2123 remote_serial_open (char *name)
2125 static int udp_warning = 0;
2127 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2128 of in ser-tcp.c, because it is the remote protocol assuming that the
2129 serial connection is reliable and not the serial connection promising
2131 if (!udp_warning && strncmp (name, "udp:", 4) == 0)
2133 warning ("The remote protocol may be unreliable over UDP.");
2134 warning ("Some events may be lost, rendering further debugging "
2139 return serial_open (name);
2143 remote_open_1 (char *name, int from_tty, struct target_ops *target,
2144 int extended_p, int async_p)
2147 struct remote_state *rs = get_remote_state ();
2149 error ("To open a remote debug connection, you need to specify what\n"
2150 "serial device is attached to the remote system\n"
2151 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
2153 /* See FIXME above */
2155 wait_forever_enabled_p = 1;
2157 reopen_exec_file ();
2160 target_preopen (from_tty);
2162 unpush_target (target);
2164 remote_desc = remote_serial_open (name);
2166 perror_with_name (name);
2168 if (baud_rate != -1)
2170 if (serial_setbaudrate (remote_desc, baud_rate))
2172 /* The requested speed could not be set. Error out to
2173 top level after closing remote_desc. Take care to
2174 set remote_desc to NULL to avoid closing remote_desc
2176 serial_close (remote_desc);
2178 perror_with_name (name);
2182 serial_raw (remote_desc);
2184 /* If there is something sitting in the buffer we might take it as a
2185 response to a command, which would be bad. */
2186 serial_flush_input (remote_desc);
2190 puts_filtered ("Remote debugging using ");
2191 puts_filtered (name);
2192 puts_filtered ("\n");
2194 push_target (target); /* Switch to using remote target now */
2196 init_all_packet_configs ();
2198 general_thread = -2;
2199 continue_thread = -2;
2201 /* Probe for ability to use "ThreadInfo" query, as required. */
2202 use_threadinfo_query = 1;
2203 use_threadextra_query = 1;
2205 /* Without this, some commands which require an active target (such
2206 as kill) won't work. This variable serves (at least) double duty
2207 as both the pid of the target process (if it has such), and as a
2208 flag indicating that a target is active. These functions should
2209 be split out into seperate variables, especially since GDB will
2210 someday have a notion of debugging several processes. */
2212 inferior_ptid = pid_to_ptid (MAGIC_NULL_PID);
2216 /* With this target we start out by owning the terminal. */
2217 remote_async_terminal_ours_p = 1;
2219 /* FIXME: cagney/1999-09-23: During the initial connection it is
2220 assumed that the target is already ready and able to respond to
2221 requests. Unfortunately remote_start_remote() eventually calls
2222 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2223 around this. Eventually a mechanism that allows
2224 wait_for_inferior() to expect/get timeouts will be
2226 wait_forever_enabled_p = 0;
2229 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2230 /* First delete any symbols previously loaded from shared libraries. */
2231 no_shared_libraries (NULL, 0);
2234 /* Start the remote connection. If error() or QUIT, discard this
2235 target (we'd otherwise be in an inconsistent state) and then
2236 propogate the error on up the exception chain. This ensures that
2237 the caller doesn't stumble along blindly assuming that the
2238 function succeeded. The CLI doesn't have this problem but other
2239 UI's, such as MI do.
2241 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
2242 this function should return an error indication letting the
2243 caller restore the previous state. Unfortunately the command
2244 ``target remote'' is directly wired to this function making that
2245 impossible. On a positive note, the CLI side of this problem has
2246 been fixed - the function set_cmd_context() makes it possible for
2247 all the ``target ....'' commands to share a common callback
2248 function. See cli-dump.c. */
2249 ex = catch_exceptions (uiout,
2250 remote_start_remote, NULL,
2251 "Couldn't establish connection to remote"
2258 wait_forever_enabled_p = 1;
2259 throw_exception (ex);
2263 wait_forever_enabled_p = 1;
2267 /* Tell the remote that we are using the extended protocol. */
2268 char *buf = alloca (rs->remote_packet_size);
2270 getpkt (buf, (rs->remote_packet_size), 0);
2272 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2273 /* FIXME: need a master target_open vector from which all
2274 remote_opens can be called, so that stuff like this can
2275 go there. Failing that, the following code must be copied
2276 to the open function for any remote target that wants to
2277 support svr4 shared libraries. */
2279 /* Set up to detect and load shared libraries. */
2280 if (exec_bfd) /* No use without an exec file. */
2282 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid));
2283 remote_check_symbols (symfile_objfile);
2288 /* This takes a program previously attached to and detaches it. After
2289 this is done, GDB can be used to debug some other program. We
2290 better not have left any breakpoints in the target program or it'll
2291 die when it hits one. */
2294 remote_detach (char *args, int from_tty)
2296 struct remote_state *rs = get_remote_state ();
2297 char *buf = alloca (rs->remote_packet_size);
2300 error ("Argument given to \"detach\" when remotely debugging.");
2302 /* Tell the remote target to detach. */
2304 remote_send (buf, (rs->remote_packet_size));
2306 /* Unregister the file descriptor from the event loop. */
2307 if (target_is_async_p ())
2308 serial_async (remote_desc, NULL, 0);
2310 target_mourn_inferior ();
2312 puts_filtered ("Ending remote debugging.\n");
2315 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
2318 remote_disconnect (char *args, int from_tty)
2320 struct remote_state *rs = get_remote_state ();
2321 char *buf = alloca (rs->remote_packet_size);
2324 error ("Argument given to \"detach\" when remotely debugging.");
2326 /* Unregister the file descriptor from the event loop. */
2327 if (target_is_async_p ())
2328 serial_async (remote_desc, NULL, 0);
2330 target_mourn_inferior ();
2332 puts_filtered ("Ending remote debugging.\n");
2335 /* Convert hex digit A to a number. */
2340 if (a >= '0' && a <= '9')
2342 else if (a >= 'a' && a <= 'f')
2343 return a - 'a' + 10;
2344 else if (a >= 'A' && a <= 'F')
2345 return a - 'A' + 10;
2347 error ("Reply contains invalid hex digit %d", a);
2351 hex2bin (const char *hex, char *bin, int count)
2355 for (i = 0; i < count; i++)
2357 if (hex[0] == 0 || hex[1] == 0)
2359 /* Hex string is short, or of uneven length.
2360 Return the count that has been converted so far. */
2363 *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]);
2369 /* Convert number NIB to a hex digit. */
2377 return 'a' + nib - 10;
2381 bin2hex (const char *bin, char *hex, int count)
2384 /* May use a length, or a nul-terminated string as input. */
2386 count = strlen (bin);
2388 for (i = 0; i < count; i++)
2390 *hex++ = tohex ((*bin >> 4) & 0xf);
2391 *hex++ = tohex (*bin++ & 0xf);
2397 /* Check for the availability of vCont. This function should also check
2401 remote_vcont_probe (struct remote_state *rs, char *buf)
2403 strcpy (buf, "vCont?");
2405 getpkt (buf, rs->remote_packet_size, 0);
2407 /* Make sure that the features we assume are supported. */
2408 if (strncmp (buf, "vCont", 5) == 0)
2411 int support_s, support_S, support_c, support_C;
2417 while (p && *p == ';')
2420 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
2422 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
2424 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
2426 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
2429 p = strchr (p, ';');
2432 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
2433 BUF will make packet_ok disable the packet. */
2434 if (!support_s || !support_S || !support_c || !support_C)
2438 packet_ok (buf, &remote_protocol_vcont);
2441 /* Resume the remote inferior by using a "vCont" packet. The thread
2442 to be resumed is PTID; STEP and SIGGNAL indicate whether the
2443 resumed thread should be single-stepped and/or signalled. If PTID's
2444 PID is -1, then all threads are resumed; the thread to be stepped and/or
2445 signalled is given in the global INFERIOR_PTID. This function returns
2446 non-zero iff it resumes the inferior.
2448 This function issues a strict subset of all possible vCont commands at the
2452 remote_vcont_resume (ptid_t ptid, int step, enum target_signal siggnal)
2454 struct remote_state *rs = get_remote_state ();
2455 int pid = PIDGET (ptid);
2456 char *buf = NULL, *outbuf;
2457 struct cleanup *old_cleanup;
2459 buf = xmalloc (rs->remote_packet_size);
2460 old_cleanup = make_cleanup (xfree, buf);
2462 if (remote_protocol_vcont.support == PACKET_SUPPORT_UNKNOWN)
2463 remote_vcont_probe (rs, buf);
2465 if (remote_protocol_vcont.support == PACKET_DISABLE)
2467 do_cleanups (old_cleanup);
2471 /* If we could generate a wider range of packets, we'd have to worry
2472 about overflowing BUF. Should there be a generic
2473 "multi-part-packet" packet? */
2475 if (PIDGET (inferior_ptid) == MAGIC_NULL_PID)
2477 /* MAGIC_NULL_PTID means that we don't have any active threads, so we
2478 don't have any PID numbers the inferior will understand. Make sure
2479 to only send forms that do not specify a PID. */
2480 if (step && siggnal != TARGET_SIGNAL_0)
2481 outbuf = xstrprintf ("vCont;S%02x", siggnal);
2483 outbuf = xstrprintf ("vCont;s");
2484 else if (siggnal != TARGET_SIGNAL_0)
2485 outbuf = xstrprintf ("vCont;C%02x", siggnal);
2487 outbuf = xstrprintf ("vCont;c");
2491 /* Resume all threads, with preference for INFERIOR_PTID. */
2492 if (step && siggnal != TARGET_SIGNAL_0)
2493 outbuf = xstrprintf ("vCont;S%02x:%x;c", siggnal,
2494 PIDGET (inferior_ptid));
2496 outbuf = xstrprintf ("vCont;s:%x;c", PIDGET (inferior_ptid));
2497 else if (siggnal != TARGET_SIGNAL_0)
2498 outbuf = xstrprintf ("vCont;C%02x:%x;c", siggnal,
2499 PIDGET (inferior_ptid));
2501 outbuf = xstrprintf ("vCont;c");
2505 /* Scheduler locking; resume only PTID. */
2506 if (step && siggnal != TARGET_SIGNAL_0)
2507 outbuf = xstrprintf ("vCont;S%02x:%x", siggnal, pid);
2509 outbuf = xstrprintf ("vCont;s:%x", pid);
2510 else if (siggnal != TARGET_SIGNAL_0)
2511 outbuf = xstrprintf ("vCont;C%02x:%x", siggnal, pid);
2513 outbuf = xstrprintf ("vCont;c:%x", pid);
2516 gdb_assert (outbuf && strlen (outbuf) < rs->remote_packet_size);
2517 make_cleanup (xfree, outbuf);
2521 do_cleanups (old_cleanup);
2526 /* Tell the remote machine to resume. */
2528 static enum target_signal last_sent_signal = TARGET_SIGNAL_0;
2530 static int last_sent_step;
2533 remote_resume (ptid_t ptid, int step, enum target_signal siggnal)
2535 struct remote_state *rs = get_remote_state ();
2536 char *buf = alloca (rs->remote_packet_size);
2537 int pid = PIDGET (ptid);
2540 last_sent_signal = siggnal;
2541 last_sent_step = step;
2543 /* A hook for when we need to do something at the last moment before
2545 if (deprecated_target_resume_hook)
2546 (*deprecated_target_resume_hook) ();
2548 /* The vCont packet doesn't need to specify threads via Hc. */
2549 if (remote_vcont_resume (ptid, step, siggnal))
2552 /* All other supported resume packets do use Hc, so call set_thread. */
2554 set_thread (0, 0); /* run any thread */
2556 set_thread (pid, 0); /* run this thread */
2558 if (siggnal != TARGET_SIGNAL_0)
2560 buf[0] = step ? 'S' : 'C';
2561 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
2562 buf[2] = tohex (((int) siggnal) & 0xf);
2566 strcpy (buf, step ? "s" : "c");
2571 /* Same as remote_resume, but with async support. */
2573 remote_async_resume (ptid_t ptid, int step, enum target_signal siggnal)
2575 remote_resume (ptid, step, siggnal);
2577 /* We are about to start executing the inferior, let's register it
2578 with the event loop. NOTE: this is the one place where all the
2579 execution commands end up. We could alternatively do this in each
2580 of the execution commands in infcmd.c.*/
2581 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
2582 into infcmd.c in order to allow inferior function calls to work
2583 NOT asynchronously. */
2584 if (target_can_async_p ())
2585 target_async (inferior_event_handler, 0);
2586 /* Tell the world that the target is now executing. */
2587 /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set
2588 this? Instead, should the client of target just assume (for
2589 async targets) that the target is going to start executing? Is
2590 this information already found in the continuation block? */
2591 if (target_is_async_p ())
2592 target_executing = 1;
2596 /* Set up the signal handler for SIGINT, while the target is
2597 executing, ovewriting the 'regular' SIGINT signal handler. */
2599 initialize_sigint_signal_handler (void)
2601 sigint_remote_token =
2602 create_async_signal_handler (async_remote_interrupt, NULL);
2603 signal (SIGINT, handle_remote_sigint);
2606 /* Signal handler for SIGINT, while the target is executing. */
2608 handle_remote_sigint (int sig)
2610 signal (sig, handle_remote_sigint_twice);
2611 sigint_remote_twice_token =
2612 create_async_signal_handler (async_remote_interrupt_twice, NULL);
2613 mark_async_signal_handler_wrapper (sigint_remote_token);
2616 /* Signal handler for SIGINT, installed after SIGINT has already been
2617 sent once. It will take effect the second time that the user sends
2620 handle_remote_sigint_twice (int sig)
2622 signal (sig, handle_sigint);
2623 sigint_remote_twice_token =
2624 create_async_signal_handler (inferior_event_handler_wrapper, NULL);
2625 mark_async_signal_handler_wrapper (sigint_remote_twice_token);
2628 /* Perform the real interruption of the target execution, in response
2631 async_remote_interrupt (gdb_client_data arg)
2634 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
2639 /* Perform interrupt, if the first attempt did not succeed. Just give
2640 up on the target alltogether. */
2642 async_remote_interrupt_twice (gdb_client_data arg)
2645 fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n");
2646 /* Do something only if the target was not killed by the previous
2648 if (target_executing)
2651 signal (SIGINT, handle_remote_sigint);
2655 /* Reinstall the usual SIGINT handlers, after the target has
2658 cleanup_sigint_signal_handler (void *dummy)
2660 signal (SIGINT, handle_sigint);
2661 if (sigint_remote_twice_token)
2662 delete_async_signal_handler ((struct async_signal_handler **) & sigint_remote_twice_token);
2663 if (sigint_remote_token)
2664 delete_async_signal_handler ((struct async_signal_handler **) & sigint_remote_token);
2667 /* Send ^C to target to halt it. Target will respond, and send us a
2669 static void (*ofunc) (int);
2671 /* The command line interface's stop routine. This function is installed
2672 as a signal handler for SIGINT. The first time a user requests a
2673 stop, we call remote_stop to send a break or ^C. If there is no
2674 response from the target (it didn't stop when the user requested it),
2675 we ask the user if he'd like to detach from the target. */
2677 remote_interrupt (int signo)
2679 /* If this doesn't work, try more severe steps. */
2680 signal (signo, remote_interrupt_twice);
2683 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
2688 /* The user typed ^C twice. */
2691 remote_interrupt_twice (int signo)
2693 signal (signo, ofunc);
2695 signal (signo, remote_interrupt);
2698 /* This is the generic stop called via the target vector. When a target
2699 interrupt is requested, either by the command line or the GUI, we
2700 will eventually end up here. */
2704 /* Send a break or a ^C, depending on user preference. */
2706 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
2709 serial_send_break (remote_desc);
2711 serial_write (remote_desc, "\003", 1);
2714 /* Ask the user what to do when an interrupt is received. */
2717 interrupt_query (void)
2719 target_terminal_ours ();
2721 if (query ("Interrupted while waiting for the program.\n\
2722 Give up (and stop debugging it)? "))
2724 target_mourn_inferior ();
2725 throw_exception (RETURN_QUIT);
2728 target_terminal_inferior ();
2731 /* Enable/disable target terminal ownership. Most targets can use
2732 terminal groups to control terminal ownership. Remote targets are
2733 different in that explicit transfer of ownership to/from GDB/target
2737 remote_async_terminal_inferior (void)
2739 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
2740 sync_execution here. This function should only be called when
2741 GDB is resuming the inferior in the forground. A background
2742 resume (``run&'') should leave GDB in control of the terminal and
2743 consequently should not call this code. */
2744 if (!sync_execution)
2746 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
2747 calls target_terminal_*() idenpotent. The event-loop GDB talking
2748 to an asynchronous target with a synchronous command calls this
2749 function from both event-top.c and infrun.c/infcmd.c. Once GDB
2750 stops trying to transfer the terminal to the target when it
2751 shouldn't this guard can go away. */
2752 if (!remote_async_terminal_ours_p)
2754 delete_file_handler (input_fd);
2755 remote_async_terminal_ours_p = 0;
2756 initialize_sigint_signal_handler ();
2757 /* NOTE: At this point we could also register our selves as the
2758 recipient of all input. Any characters typed could then be
2759 passed on down to the target. */
2763 remote_async_terminal_ours (void)
2765 /* See FIXME in remote_async_terminal_inferior. */
2766 if (!sync_execution)
2768 /* See FIXME in remote_async_terminal_inferior. */
2769 if (remote_async_terminal_ours_p)
2771 cleanup_sigint_signal_handler (NULL);
2772 add_file_handler (input_fd, stdin_event_handler, 0);
2773 remote_async_terminal_ours_p = 1;
2776 /* If nonzero, ignore the next kill. */
2781 remote_console_output (char *msg)
2785 for (p = msg; p[0] && p[1]; p += 2)
2788 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
2791 fputs_unfiltered (tb, gdb_stdtarg);
2793 gdb_flush (gdb_stdtarg);
2796 /* Wait until the remote machine stops, then return,
2797 storing status in STATUS just as `wait' would.
2798 Returns "pid", which in the case of a multi-threaded
2799 remote OS, is the thread-id. */
2802 remote_wait (ptid_t ptid, struct target_waitstatus *status)
2804 struct remote_state *rs = get_remote_state ();
2805 unsigned char *buf = alloca (rs->remote_packet_size);
2806 ULONGEST thread_num = -1;
2809 status->kind = TARGET_WAITKIND_EXITED;
2810 status->value.integer = 0;
2816 ofunc = signal (SIGINT, remote_interrupt);
2817 getpkt (buf, (rs->remote_packet_size), 1);
2818 signal (SIGINT, ofunc);
2820 /* This is a hook for when we need to do something (perhaps the
2821 collection of trace data) every time the target stops. */
2822 if (deprecated_target_wait_loop_hook)
2823 (*deprecated_target_wait_loop_hook) ();
2825 remote_stopped_by_watchpoint_p = 0;
2829 case 'E': /* Error of some sort */
2830 warning ("Remote failure reply: %s", buf);
2832 case 'F': /* File-I/O request */
2833 remote_fileio_request (buf);
2835 case 'T': /* Status with PC, SP, FP, ... */
2838 char regs[MAX_REGISTER_SIZE];
2840 /* Expedited reply, containing Signal, {regno, reg} repeat */
2841 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
2843 n... = register number
2844 r... = register contents
2846 p = &buf[3]; /* after Txx */
2855 /* If the packet contains a register number save it in pnum
2856 and set p1 to point to the character following it.
2857 Otherwise p1 points to p. */
2859 /* If this packet is an awatch packet, don't parse the 'a'
2860 as a register number. */
2862 if (strncmp (p, "awatch", strlen("awatch")) != 0)
2864 /* Read the ``P'' register number. */
2865 pnum = strtol (p, &p_temp, 16);
2866 p1 = (unsigned char *) p_temp;
2871 if (p1 == p) /* No register number present here */
2873 p1 = (unsigned char *) strchr (p, ':');
2875 warning ("Malformed packet(a) (missing colon): %s\n\
2878 if (strncmp (p, "thread", p1 - p) == 0)
2880 p_temp = unpack_varlen_hex (++p1, &thread_num);
2881 record_currthread (thread_num);
2882 p = (unsigned char *) p_temp;
2884 else if ((strncmp (p, "watch", p1 - p) == 0)
2885 || (strncmp (p, "rwatch", p1 - p) == 0)
2886 || (strncmp (p, "awatch", p1 - p) == 0))
2888 remote_stopped_by_watchpoint_p = 1;
2889 p = unpack_varlen_hex (++p1, &addr);
2890 remote_watch_data_address = (CORE_ADDR)addr;
2894 /* Silently skip unknown optional info. */
2895 p_temp = strchr (p1 + 1, ';');
2897 p = (unsigned char *) p_temp;
2902 struct packet_reg *reg = packet_reg_from_pnum (rs, pnum);
2906 error ("Malformed packet(b) (missing colon): %s\nPacket: '%s'\n",
2910 error ("Remote sent bad register number %s: %s\nPacket: '%s'\n",
2911 phex_nz (pnum, 0), p, buf);
2913 fieldsize = hex2bin (p, regs, register_size (current_gdbarch, reg->regnum));
2915 if (fieldsize < register_size (current_gdbarch, reg->regnum))
2916 warning ("Remote reply is too short: %s", buf);
2917 regcache_raw_supply (current_regcache, reg->regnum, regs);
2921 error ("Remote register badly formatted: %s\nhere: %s", buf, p);
2925 case 'S': /* Old style status, just signal only */
2926 status->kind = TARGET_WAITKIND_STOPPED;
2927 status->value.sig = (enum target_signal)
2928 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
2932 thread_num = strtol ((const char *) &buf[4], NULL, 16);
2933 record_currthread (thread_num);
2936 case 'W': /* Target exited */
2938 /* The remote process exited. */
2939 status->kind = TARGET_WAITKIND_EXITED;
2940 status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
2944 status->kind = TARGET_WAITKIND_SIGNALLED;
2945 status->value.sig = (enum target_signal)
2946 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
2950 case 'O': /* Console output */
2951 remote_console_output (buf + 1);
2954 if (last_sent_signal != TARGET_SIGNAL_0)
2956 /* Zero length reply means that we tried 'S' or 'C' and
2957 the remote system doesn't support it. */
2958 target_terminal_ours_for_output ();
2960 ("Can't send signals to this remote system. %s not sent.\n",
2961 target_signal_to_name (last_sent_signal));
2962 last_sent_signal = TARGET_SIGNAL_0;
2963 target_terminal_inferior ();
2965 strcpy ((char *) buf, last_sent_step ? "s" : "c");
2966 putpkt ((char *) buf);
2969 /* else fallthrough */
2971 warning ("Invalid remote reply: %s", buf);
2976 if (thread_num != -1)
2978 return pid_to_ptid (thread_num);
2980 return inferior_ptid;
2983 /* Async version of remote_wait. */
2985 remote_async_wait (ptid_t ptid, struct target_waitstatus *status)
2987 struct remote_state *rs = get_remote_state ();
2988 unsigned char *buf = alloca (rs->remote_packet_size);
2989 ULONGEST thread_num = -1;
2992 status->kind = TARGET_WAITKIND_EXITED;
2993 status->value.integer = 0;
2995 remote_stopped_by_watchpoint_p = 0;
3001 if (!target_is_async_p ())
3002 ofunc = signal (SIGINT, remote_interrupt);
3003 /* FIXME: cagney/1999-09-27: If we're in async mode we should
3004 _never_ wait for ever -> test on target_is_async_p().
3005 However, before we do that we need to ensure that the caller
3006 knows how to take the target into/out of async mode. */
3007 getpkt (buf, (rs->remote_packet_size), wait_forever_enabled_p);
3008 if (!target_is_async_p ())
3009 signal (SIGINT, ofunc);
3011 /* This is a hook for when we need to do something (perhaps the
3012 collection of trace data) every time the target stops. */
3013 if (deprecated_target_wait_loop_hook)
3014 (*deprecated_target_wait_loop_hook) ();
3018 case 'E': /* Error of some sort */
3019 warning ("Remote failure reply: %s", buf);
3021 case 'F': /* File-I/O request */
3022 remote_fileio_request (buf);
3024 case 'T': /* Status with PC, SP, FP, ... */
3027 char regs[MAX_REGISTER_SIZE];
3029 /* Expedited reply, containing Signal, {regno, reg} repeat */
3030 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3032 n... = register number
3033 r... = register contents
3035 p = &buf[3]; /* after Txx */
3044 /* If the packet contains a register number, save it in pnum
3045 and set p1 to point to the character following it.
3046 Otherwise p1 points to p. */
3048 /* If this packet is an awatch packet, don't parse the 'a'
3049 as a register number. */
3051 if (!strncmp (p, "awatch", strlen ("awatch")) != 0)
3053 /* Read the register number. */
3054 pnum = strtol (p, &p_temp, 16);
3055 p1 = (unsigned char *) p_temp;
3060 if (p1 == p) /* No register number present here */
3062 p1 = (unsigned char *) strchr (p, ':');
3064 error ("Malformed packet(a) (missing colon): %s\nPacket: '%s'\n",
3066 if (strncmp (p, "thread", p1 - p) == 0)
3068 p_temp = unpack_varlen_hex (++p1, &thread_num);
3069 record_currthread (thread_num);
3070 p = (unsigned char *) p_temp;
3072 else if ((strncmp (p, "watch", p1 - p) == 0)
3073 || (strncmp (p, "rwatch", p1 - p) == 0)
3074 || (strncmp (p, "awatch", p1 - p) == 0))
3076 remote_stopped_by_watchpoint_p = 1;
3077 p = unpack_varlen_hex (++p1, &addr);
3078 remote_watch_data_address = (CORE_ADDR)addr;
3082 /* Silently skip unknown optional info. */
3083 p_temp = (unsigned char *) strchr (p1 + 1, ';');
3091 struct packet_reg *reg = packet_reg_from_pnum (rs, pnum);
3094 error ("Malformed packet(b) (missing colon): %s\nPacket: '%s'\n",
3098 error ("Remote sent bad register number %ld: %s\nPacket: '%s'\n",
3101 fieldsize = hex2bin (p, regs, register_size (current_gdbarch, reg->regnum));
3103 if (fieldsize < register_size (current_gdbarch, reg->regnum))
3104 warning ("Remote reply is too short: %s", buf);
3105 regcache_raw_supply (current_regcache, reg->regnum, regs);
3109 error ("Remote register badly formatted: %s\nhere: %s",
3114 case 'S': /* Old style status, just signal only */
3115 status->kind = TARGET_WAITKIND_STOPPED;
3116 status->value.sig = (enum target_signal)
3117 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3121 thread_num = strtol ((const char *) &buf[4], NULL, 16);
3122 record_currthread (thread_num);
3125 case 'W': /* Target exited */
3127 /* The remote process exited. */
3128 status->kind = TARGET_WAITKIND_EXITED;
3129 status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
3133 status->kind = TARGET_WAITKIND_SIGNALLED;
3134 status->value.sig = (enum target_signal)
3135 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3139 case 'O': /* Console output */
3140 remote_console_output (buf + 1);
3141 /* Return immediately to the event loop. The event loop will
3142 still be waiting on the inferior afterwards. */
3143 status->kind = TARGET_WAITKIND_IGNORE;
3146 if (last_sent_signal != TARGET_SIGNAL_0)
3148 /* Zero length reply means that we tried 'S' or 'C' and
3149 the remote system doesn't support it. */
3150 target_terminal_ours_for_output ();
3152 ("Can't send signals to this remote system. %s not sent.\n",
3153 target_signal_to_name (last_sent_signal));
3154 last_sent_signal = TARGET_SIGNAL_0;
3155 target_terminal_inferior ();
3157 strcpy ((char *) buf, last_sent_step ? "s" : "c");
3158 putpkt ((char *) buf);
3161 /* else fallthrough */
3163 warning ("Invalid remote reply: %s", buf);
3168 if (thread_num != -1)
3170 return pid_to_ptid (thread_num);
3172 return inferior_ptid;
3175 /* Number of bytes of registers this stub implements. */
3177 static int register_bytes_found;
3179 /* Read the remote registers into the block REGS. */
3180 /* Currently we just read all the registers, so we don't use regnum. */
3183 fetch_register_using_p (int regnum)
3185 struct remote_state *rs = get_remote_state ();
3186 char *buf = alloca (rs->remote_packet_size), *p;
3187 char regp[MAX_REGISTER_SIZE];
3192 p += hexnumstr (p, regnum);
3194 remote_send (buf, rs->remote_packet_size);
3195 if (buf[0] != 0 && buf[0] != 'E') {
3200 error("fetch_register_using_p: early buf termination");
3203 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
3206 regcache_raw_supply (current_regcache, regnum, regp);
3214 remote_fetch_registers (int regnum)
3216 struct remote_state *rs = get_remote_state ();
3217 char *buf = alloca (rs->remote_packet_size);
3220 char *regs = alloca (rs->sizeof_g_packet);
3222 set_thread (PIDGET (inferior_ptid), 1);
3226 struct packet_reg *reg = packet_reg_from_regnum (rs, regnum);
3227 gdb_assert (reg != NULL);
3228 if (!reg->in_g_packet)
3229 internal_error (__FILE__, __LINE__,
3230 "Attempt to fetch a non G-packet register when this "
3231 "remote.c does not support the p-packet.");
3233 switch (remote_protocol_p.support)
3235 case PACKET_DISABLE:
3238 if (fetch_register_using_p (regnum))
3241 error ("Protocol error: p packet not recognized by stub");
3242 case PACKET_SUPPORT_UNKNOWN:
3243 if (fetch_register_using_p (regnum))
3245 /* The stub recognized the 'p' packet. Remember this. */
3246 remote_protocol_p.support = PACKET_ENABLE;
3251 /* The stub does not support the 'P' packet. Use 'G'
3252 instead, and don't try using 'P' in the future (it
3253 will just waste our time). */
3254 remote_protocol_p.support = PACKET_DISABLE;
3260 remote_send (buf, (rs->remote_packet_size));
3262 /* Save the size of the packet sent to us by the target. Its used
3263 as a heuristic when determining the max size of packets that the
3264 target can safely receive. */
3265 if ((rs->actual_register_packet_size) == 0)
3266 (rs->actual_register_packet_size) = strlen (buf);
3268 /* Unimplemented registers read as all bits zero. */
3269 memset (regs, 0, rs->sizeof_g_packet);
3271 /* We can get out of synch in various cases. If the first character
3272 in the buffer is not a hex character, assume that has happened
3273 and try to fetch another packet to read. */
3274 while ((buf[0] < '0' || buf[0] > '9')
3275 && (buf[0] < 'a' || buf[0] > 'f')
3276 && buf[0] != 'x') /* New: unavailable register value */
3279 fprintf_unfiltered (gdb_stdlog,
3280 "Bad register packet; fetching a new packet\n");
3281 getpkt (buf, (rs->remote_packet_size), 0);
3284 /* Reply describes registers byte by byte, each byte encoded as two
3285 hex characters. Suck them all up, then supply them to the
3286 register cacheing/storage mechanism. */
3289 for (i = 0; i < rs->sizeof_g_packet; i++)
3295 warning ("Remote reply is of odd length: %s", buf);
3296 /* Don't change register_bytes_found in this case, and don't
3297 print a second warning. */
3300 if (p[0] == 'x' && p[1] == 'x')
3301 regs[i] = 0; /* 'x' */
3303 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
3307 if (i != register_bytes_found)
3309 register_bytes_found = i;
3310 if (REGISTER_BYTES_OK_P ()
3311 && !REGISTER_BYTES_OK (i))
3312 warning ("Remote reply is too short: %s", buf);
3318 for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++)
3320 struct packet_reg *r = &rs->regs[i];
3323 if (r->offset * 2 >= strlen (buf))
3324 /* A short packet that didn't include the register's
3325 value, this implies that the register is zero (and
3326 not that the register is unavailable). Supply that
3328 regcache_raw_supply (current_regcache, r->regnum, NULL);
3329 else if (buf[r->offset * 2] == 'x')
3331 gdb_assert (r->offset * 2 < strlen (buf));
3332 /* The register isn't available, mark it as such (at
3333 the same time setting the value to zero). */
3334 regcache_raw_supply (current_regcache, r->regnum, NULL);
3335 set_register_cached (i, -1);
3338 regcache_raw_supply (current_regcache, r->regnum,
3345 /* Prepare to store registers. Since we may send them all (using a
3346 'G' request), we have to read out the ones we don't want to change
3350 remote_prepare_to_store (void)
3352 struct remote_state *rs = get_remote_state ();
3354 char buf[MAX_REGISTER_SIZE];
3356 /* Make sure the entire registers array is valid. */
3357 switch (remote_protocol_P.support)
3359 case PACKET_DISABLE:
3360 case PACKET_SUPPORT_UNKNOWN:
3361 /* Make sure all the necessary registers are cached. */
3362 for (i = 0; i < NUM_REGS; i++)
3363 if (rs->regs[i].in_g_packet)
3364 regcache_raw_read (current_regcache, rs->regs[i].regnum, buf);
3371 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
3372 packet was not recognized. */
3375 store_register_using_P (int regnum)
3377 struct remote_state *rs = get_remote_state ();
3378 struct packet_reg *reg = packet_reg_from_regnum (rs, regnum);
3379 /* Try storing a single register. */
3380 char *buf = alloca (rs->remote_packet_size);
3381 char regp[MAX_REGISTER_SIZE];
3385 sprintf (buf, "P%s=", phex_nz (reg->pnum, 0));
3386 p = buf + strlen (buf);
3387 regcache_raw_collect (current_regcache, reg->regnum, regp);
3388 bin2hex (regp, p, register_size (current_gdbarch, reg->regnum));
3389 remote_send (buf, rs->remote_packet_size);
3391 return buf[0] != '\0';
3395 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
3396 of the register cache buffer. FIXME: ignores errors. */
3399 remote_store_registers (int regnum)
3401 struct remote_state *rs = get_remote_state ();
3407 set_thread (PIDGET (inferior_ptid), 1);
3411 switch (remote_protocol_P.support)
3413 case PACKET_DISABLE:
3416 if (store_register_using_P (regnum))
3419 error ("Protocol error: P packet not recognized by stub");
3420 case PACKET_SUPPORT_UNKNOWN:
3421 if (store_register_using_P (regnum))
3423 /* The stub recognized the 'P' packet. Remember this. */
3424 remote_protocol_P.support = PACKET_ENABLE;
3429 /* The stub does not support the 'P' packet. Use 'G'
3430 instead, and don't try using 'P' in the future (it
3431 will just waste our time). */
3432 remote_protocol_P.support = PACKET_DISABLE;
3438 /* Extract all the registers in the regcache copying them into a
3442 regs = alloca (rs->sizeof_g_packet);
3443 memset (regs, rs->sizeof_g_packet, 0);
3444 for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++)
3446 struct packet_reg *r = &rs->regs[i];
3448 regcache_raw_collect (current_regcache, r->regnum, regs + r->offset);
3452 /* Command describes registers byte by byte,
3453 each byte encoded as two hex characters. */
3454 buf = alloca (rs->remote_packet_size);
3457 /* remote_prepare_to_store insures that register_bytes_found gets set. */
3458 bin2hex (regs, p, register_bytes_found);
3459 remote_send (buf, (rs->remote_packet_size));
3463 /* Return the number of hex digits in num. */
3466 hexnumlen (ULONGEST num)
3470 for (i = 0; num != 0; i++)
3476 /* Set BUF to the minimum number of hex digits representing NUM. */
3479 hexnumstr (char *buf, ULONGEST num)
3481 int len = hexnumlen (num);
3482 return hexnumnstr (buf, num, len);
3486 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
3489 hexnumnstr (char *buf, ULONGEST num, int width)
3495 for (i = width - 1; i >= 0; i--)
3497 buf[i] = "0123456789abcdef"[(num & 0xf)];
3504 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
3507 remote_address_masked (CORE_ADDR addr)
3509 if (remote_address_size > 0
3510 && remote_address_size < (sizeof (ULONGEST) * 8))
3512 /* Only create a mask when that mask can safely be constructed
3513 in a ULONGEST variable. */
3515 mask = (mask << remote_address_size) - 1;
3521 /* Determine whether the remote target supports binary downloading.
3522 This is accomplished by sending a no-op memory write of zero length
3523 to the target at the specified address. It does not suffice to send
3524 the whole packet, since many stubs strip the eighth bit and subsequently
3525 compute a wrong checksum, which causes real havoc with remote_write_bytes.
3527 NOTE: This can still lose if the serial line is not eight-bit
3528 clean. In cases like this, the user should clear "remote
3532 check_binary_download (CORE_ADDR addr)
3534 struct remote_state *rs = get_remote_state ();
3535 switch (remote_protocol_binary_download.support)
3537 case PACKET_DISABLE:
3541 case PACKET_SUPPORT_UNKNOWN:
3543 char *buf = alloca (rs->remote_packet_size);
3548 p += hexnumstr (p, (ULONGEST) addr);
3550 p += hexnumstr (p, (ULONGEST) 0);
3554 putpkt_binary (buf, (int) (p - buf));
3555 getpkt (buf, (rs->remote_packet_size), 0);
3560 fprintf_unfiltered (gdb_stdlog,
3561 "binary downloading NOT suppported by target\n");
3562 remote_protocol_binary_download.support = PACKET_DISABLE;
3567 fprintf_unfiltered (gdb_stdlog,
3568 "binary downloading suppported by target\n");
3569 remote_protocol_binary_download.support = PACKET_ENABLE;
3576 /* Write memory data directly to the remote machine.
3577 This does not inform the data cache; the data cache uses this.
3578 MEMADDR is the address in the remote memory space.
3579 MYADDR is the address of the buffer in our space.
3580 LEN is the number of bytes.
3582 Returns number of bytes transferred, or 0 (setting errno) for
3583 error. Only transfer a single packet. */
3586 remote_write_bytes (CORE_ADDR memaddr, char *myaddr, int len)
3590 unsigned char *plen;
3596 unsigned char *payload_start;
3598 /* Verify that the target can support a binary download. */
3599 check_binary_download (memaddr);
3601 /* Compute the size, and then allocate space for the largest
3602 possible packet. Include space for an extra trailing NUL. */
3603 sizeof_buf = get_memory_write_packet_size () + 1;
3604 buf = alloca (sizeof_buf);
3606 /* Compute the size of the actual payload by subtracting out the
3607 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
3608 payload_size = (get_memory_write_packet_size () - (strlen ("$M,:#NN")
3609 + hexnumlen (memaddr)
3610 + hexnumlen (len)));
3612 /* Construct the packet header: "[MX]<memaddr>,<len>:". */
3614 /* Append "[XM]". Compute a best guess of the number of bytes
3615 actually transfered. */
3617 switch (remote_protocol_binary_download.support)
3621 /* Best guess at number of bytes that will fit. */
3622 todo = min (len, payload_size);
3624 case PACKET_DISABLE:
3626 /* num bytes that will fit */
3627 todo = min (len, payload_size / 2);
3629 case PACKET_SUPPORT_UNKNOWN:
3630 internal_error (__FILE__, __LINE__,
3631 "remote_write_bytes: bad internal state");
3633 internal_error (__FILE__, __LINE__, "bad switch");
3636 /* Append "<memaddr>". */
3637 memaddr = remote_address_masked (memaddr);
3638 p += hexnumstr (p, (ULONGEST) memaddr);
3643 /* Append <len>. Retain the location/size of <len>. It may need to
3644 be adjusted once the packet body has been created. */
3646 plenlen = hexnumstr (p, (ULONGEST) todo);
3653 /* Append the packet body. */
3655 switch (remote_protocol_binary_download.support)
3658 /* Binary mode. Send target system values byte by byte, in
3659 increasing byte addresses. Only escape certain critical
3662 (nr_bytes < todo) && (p - payload_start) < payload_size;
3665 switch (myaddr[nr_bytes] & 0xff)
3670 /* These must be escaped */
3672 *p++ = (myaddr[nr_bytes] & 0xff) ^ 0x20;
3675 *p++ = myaddr[nr_bytes] & 0xff;
3679 if (nr_bytes < todo)
3681 /* Escape chars have filled up the buffer prematurely,
3682 and we have actually sent fewer bytes than planned.
3683 Fix-up the length field of the packet. Use the same
3684 number of characters as before. */
3685 plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen);
3686 *plen = ':'; /* overwrite \0 from hexnumnstr() */
3689 case PACKET_DISABLE:
3690 /* Normal mode: Send target system values byte by byte, in
3691 increasing byte addresses. Each byte is encoded as a two hex
3693 nr_bytes = bin2hex (myaddr, p, todo);
3696 case PACKET_SUPPORT_UNKNOWN:
3697 internal_error (__FILE__, __LINE__,
3698 "remote_write_bytes: bad internal state");
3700 internal_error (__FILE__, __LINE__, "bad switch");
3703 putpkt_binary (buf, (int) (p - buf));
3704 getpkt (buf, sizeof_buf, 0);
3708 /* There is no correspondance between what the remote protocol
3709 uses for errors and errno codes. We would like a cleaner way
3710 of representing errors (big enough to include errno codes,
3711 bfd_error codes, and others). But for now just return EIO. */
3716 /* Return NR_BYTES, not TODO, in case escape chars caused us to send fewer
3717 bytes than we'd planned. */
3721 /* Read memory data directly from the remote machine.
3722 This does not use the data cache; the data cache uses this.
3723 MEMADDR is the address in the remote memory space.
3724 MYADDR is the address of the buffer in our space.
3725 LEN is the number of bytes.
3727 Returns number of bytes transferred, or 0 for error. */
3729 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
3730 remote targets) shouldn't attempt to read the entire buffer.
3731 Instead it should read a single packet worth of data and then
3732 return the byte size of that packet to the caller. The caller (its
3733 caller and its callers caller ;-) already contains code for
3734 handling partial reads. */
3737 remote_read_bytes (CORE_ADDR memaddr, char *myaddr, int len)
3740 int max_buf_size; /* Max size of packet output buffer */
3744 /* Create a buffer big enough for this packet. */
3745 max_buf_size = get_memory_read_packet_size ();
3746 sizeof_buf = max_buf_size + 1; /* Space for trailing NUL */
3747 buf = alloca (sizeof_buf);
3756 todo = min (len, max_buf_size / 2); /* num bytes that will fit */
3758 /* construct "m"<memaddr>","<len>" */
3759 /* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */
3760 memaddr = remote_address_masked (memaddr);
3763 p += hexnumstr (p, (ULONGEST) memaddr);
3765 p += hexnumstr (p, (ULONGEST) todo);
3769 getpkt (buf, sizeof_buf, 0);
3772 && isxdigit (buf[1]) && isxdigit (buf[2])
3775 /* There is no correspondance between what the remote protocol uses
3776 for errors and errno codes. We would like a cleaner way of
3777 representing errors (big enough to include errno codes, bfd_error
3778 codes, and others). But for now just return EIO. */
3783 /* Reply describes memory byte by byte,
3784 each byte encoded as two hex characters. */
3787 if ((i = hex2bin (p, myaddr, todo)) < todo)
3789 /* Reply is short. This means that we were able to read
3790 only part of what we wanted to. */
3791 return i + (origlen - len);
3800 /* Read or write LEN bytes from inferior memory at MEMADDR,
3801 transferring to or from debugger address BUFFER. Write to inferior if
3802 SHOULD_WRITE is nonzero. Returns length of data written or read; 0
3803 for error. TARGET is unused. */
3806 remote_xfer_memory (CORE_ADDR mem_addr, char *buffer, int mem_len,
3807 int should_write, struct mem_attrib *attrib,
3808 struct target_ops *target)
3810 CORE_ADDR targ_addr;
3814 /* Should this be the selected frame? */
3815 gdbarch_remote_translate_xfer_address (current_gdbarch, current_regcache,
3817 &targ_addr, &targ_len);
3822 res = remote_write_bytes (targ_addr, buffer, targ_len);
3824 res = remote_read_bytes (targ_addr, buffer, targ_len);
3830 remote_files_info (struct target_ops *ignore)
3832 puts_filtered ("Debugging a target over a serial line.\n");
3835 /* Stuff for dealing with the packets which are part of this protocol.
3836 See comment at top of file for details. */
3838 /* Read a single character from the remote end, masking it down to 7 bits. */
3841 readchar (int timeout)
3845 ch = serial_readchar (remote_desc, timeout);
3850 switch ((enum serial_rc) ch)
3853 target_mourn_inferior ();
3854 error ("Remote connection closed");
3857 perror_with_name ("Remote communication error");
3859 case SERIAL_TIMEOUT:
3865 /* Send the command in BUF to the remote machine, and read the reply
3866 into BUF. Report an error if we get an error reply. */
3869 remote_send (char *buf,
3873 getpkt (buf, sizeof_buf, 0);
3876 error ("Remote failure reply: %s", buf);
3879 /* Display a null-terminated packet on stdout, for debugging, using C
3883 print_packet (char *buf)
3885 puts_filtered ("\"");
3886 fputstr_filtered (buf, '"', gdb_stdout);
3887 puts_filtered ("\"");
3893 return putpkt_binary (buf, strlen (buf));
3896 /* Send a packet to the remote machine, with error checking. The data
3897 of the packet is in BUF. The string in BUF can be at most (rs->remote_packet_size) - 5
3898 to account for the $, # and checksum, and for a possible /0 if we are
3899 debugging (remote_debug) and want to print the sent packet as a string */
3902 putpkt_binary (char *buf, int cnt)
3904 struct remote_state *rs = get_remote_state ();
3906 unsigned char csum = 0;
3907 char *buf2 = alloca (cnt + 6);
3908 long sizeof_junkbuf = (rs->remote_packet_size);
3909 char *junkbuf = alloca (sizeof_junkbuf);
3915 /* Copy the packet into buffer BUF2, encapsulating it
3916 and giving it a checksum. */
3921 for (i = 0; i < cnt; i++)
3927 *p++ = tohex ((csum >> 4) & 0xf);
3928 *p++ = tohex (csum & 0xf);
3930 /* Send it over and over until we get a positive ack. */
3934 int started_error_output = 0;
3939 fprintf_unfiltered (gdb_stdlog, "Sending packet: ");
3940 fputstrn_unfiltered (buf2, p - buf2, 0, gdb_stdlog);
3941 fprintf_unfiltered (gdb_stdlog, "...");
3942 gdb_flush (gdb_stdlog);
3944 if (serial_write (remote_desc, buf2, p - buf2))
3945 perror_with_name ("putpkt: write failed");
3947 /* read until either a timeout occurs (-2) or '+' is read */
3950 ch = readchar (remote_timeout);
3958 case SERIAL_TIMEOUT:
3960 if (started_error_output)
3962 putchar_unfiltered ('\n');
3963 started_error_output = 0;
3972 fprintf_unfiltered (gdb_stdlog, "Ack\n");
3976 fprintf_unfiltered (gdb_stdlog, "Nak\n");
3977 case SERIAL_TIMEOUT:
3981 break; /* Retransmit buffer */
3985 fprintf_unfiltered (gdb_stdlog, "Packet instead of Ack, ignoring it\n");
3986 /* It's probably an old response sent because an ACK
3987 was lost. Gobble up the packet and ack it so it
3988 doesn't get retransmitted when we resend this
3990 read_frame (junkbuf, sizeof_junkbuf);
3991 serial_write (remote_desc, "+", 1);
3992 continue; /* Now, go look for + */
3997 if (!started_error_output)
3999 started_error_output = 1;
4000 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
4002 fputc_unfiltered (ch & 0177, gdb_stdlog);
4006 break; /* Here to retransmit */
4010 /* This is wrong. If doing a long backtrace, the user should be
4011 able to get out next time we call QUIT, without anything as
4012 violent as interrupt_query. If we want to provide a way out of
4013 here without getting to the next QUIT, it should be based on
4014 hitting ^C twice as in remote_wait. */
4024 /* Come here after finding the start of the frame. Collect the rest
4025 into BUF, verifying the checksum, length, and handling run-length
4026 compression. No more than sizeof_buf-1 characters are read so that
4027 the buffer can be NUL terminated.
4029 Returns -1 on error, number of characters in buffer (ignoring the
4030 trailing NULL) on success. (could be extended to return one of the
4031 SERIAL status indications). */
4034 read_frame (char *buf,
4046 /* ASSERT (bc < sizeof_buf - 1) - space for trailing NUL */
4047 c = readchar (remote_timeout);
4050 case SERIAL_TIMEOUT:
4052 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
4056 fputs_filtered ("Saw new packet start in middle of old one\n",
4058 return -1; /* Start a new packet, count retries */
4061 unsigned char pktcsum;
4067 check_0 = readchar (remote_timeout);
4069 check_1 = readchar (remote_timeout);
4071 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
4074 fputs_filtered ("Timeout in checksum, retrying\n", gdb_stdlog);
4077 else if (check_0 < 0 || check_1 < 0)
4080 fputs_filtered ("Communication error in checksum\n", gdb_stdlog);
4084 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
4085 if (csum == pktcsum)
4090 fprintf_filtered (gdb_stdlog,
4091 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
4093 fputs_filtered (buf, gdb_stdlog);
4094 fputs_filtered ("\n", gdb_stdlog);
4096 /* Number of characters in buffer ignoring trailing
4100 case '*': /* Run length encoding */
4105 c = readchar (remote_timeout);
4107 repeat = c - ' ' + 3; /* Compute repeat count */
4109 /* The character before ``*'' is repeated. */
4111 if (repeat > 0 && repeat <= 255
4113 && bc + repeat - 1 < sizeof_buf - 1)
4115 memset (&buf[bc], buf[bc - 1], repeat);
4121 printf_filtered ("Repeat count %d too large for buffer: ", repeat);
4122 puts_filtered (buf);
4123 puts_filtered ("\n");
4127 if (bc < sizeof_buf - 1)
4135 puts_filtered ("Remote packet too long: ");
4136 puts_filtered (buf);
4137 puts_filtered ("\n");
4144 /* Read a packet from the remote machine, with error checking, and
4145 store it in BUF. If FOREVER, wait forever rather than timing out;
4146 this is used (in synchronous mode) to wait for a target that is is
4147 executing user code to stop. */
4148 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
4149 don't have to change all the calls to getpkt to deal with the
4150 return value, because at the moment I don't know what the right
4151 thing to do it for those. */
4159 timed_out = getpkt_sane (buf, sizeof_buf, forever);
4163 /* Read a packet from the remote machine, with error checking, and
4164 store it in BUF. If FOREVER, wait forever rather than timing out;
4165 this is used (in synchronous mode) to wait for a target that is is
4166 executing user code to stop. If FOREVER == 0, this function is
4167 allowed to time out gracefully and return an indication of this to
4170 getpkt_sane (char *buf,
4179 strcpy (buf, "timeout");
4183 timeout = watchdog > 0 ? watchdog : -1;
4187 timeout = remote_timeout;
4191 for (tries = 1; tries <= MAX_TRIES; tries++)
4193 /* This can loop forever if the remote side sends us characters
4194 continuously, but if it pauses, we'll get a zero from readchar
4195 because of timeout. Then we'll count that as a retry. */
4197 /* Note that we will only wait forever prior to the start of a packet.
4198 After that, we expect characters to arrive at a brisk pace. They
4199 should show up within remote_timeout intervals. */
4203 c = readchar (timeout);
4205 if (c == SERIAL_TIMEOUT)
4207 if (forever) /* Watchdog went off? Kill the target. */
4210 target_mourn_inferior ();
4211 error ("Watchdog has expired. Target detached.\n");
4214 fputs_filtered ("Timed out.\n", gdb_stdlog);
4220 /* We've found the start of a packet, now collect the data. */
4222 val = read_frame (buf, sizeof_buf);
4228 fprintf_unfiltered (gdb_stdlog, "Packet received: ");
4229 fputstr_unfiltered (buf, 0, gdb_stdlog);
4230 fprintf_unfiltered (gdb_stdlog, "\n");
4232 serial_write (remote_desc, "+", 1);
4236 /* Try the whole thing again. */
4238 serial_write (remote_desc, "-", 1);
4241 /* We have tried hard enough, and just can't receive the packet. Give up. */
4243 printf_unfiltered ("Ignoring packet error, continuing...\n");
4244 serial_write (remote_desc, "+", 1);
4251 /* For some mysterious reason, wait_for_inferior calls kill instead of
4252 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4256 target_mourn_inferior ();
4260 /* Use catch_errors so the user can quit from gdb even when we aren't on
4261 speaking terms with the remote system. */
4262 catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
4264 /* Don't wait for it to die. I'm not really sure it matters whether
4265 we do or not. For the existing stubs, kill is a noop. */
4266 target_mourn_inferior ();
4269 /* Async version of remote_kill. */
4271 remote_async_kill (void)
4273 /* Unregister the file descriptor from the event loop. */
4274 if (target_is_async_p ())
4275 serial_async (remote_desc, NULL, 0);
4277 /* For some mysterious reason, wait_for_inferior calls kill instead of
4278 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4282 target_mourn_inferior ();
4286 /* Use catch_errors so the user can quit from gdb even when we aren't on
4287 speaking terms with the remote system. */
4288 catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
4290 /* Don't wait for it to die. I'm not really sure it matters whether
4291 we do or not. For the existing stubs, kill is a noop. */
4292 target_mourn_inferior ();
4298 remote_mourn_1 (&remote_ops);
4302 remote_async_mourn (void)
4304 remote_mourn_1 (&remote_async_ops);
4308 extended_remote_mourn (void)
4310 /* We do _not_ want to mourn the target like this; this will
4311 remove the extended remote target from the target stack,
4312 and the next time the user says "run" it'll fail.
4314 FIXME: What is the right thing to do here? */
4316 remote_mourn_1 (&extended_remote_ops);
4320 /* Worker function for remote_mourn. */
4322 remote_mourn_1 (struct target_ops *target)
4324 unpush_target (target);
4325 generic_mourn_inferior ();
4328 /* In the extended protocol we want to be able to do things like
4329 "run" and have them basically work as expected. So we need
4330 a special create_inferior function.
4332 FIXME: One day add support for changing the exec file
4333 we're debugging, arguments and an environment. */
4336 extended_remote_create_inferior (char *exec_file, char *args, char **env,
4339 /* Rip out the breakpoints; we'll reinsert them after restarting
4340 the remote server. */
4341 remove_breakpoints ();
4343 /* Now restart the remote server. */
4344 extended_remote_restart ();
4346 /* Now put the breakpoints back in. This way we're safe if the
4347 restart function works via a unix fork on the remote side. */
4348 insert_breakpoints ();
4350 /* Clean up from the last time we were running. */
4351 clear_proceed_status ();
4353 /* Let the remote process run. */
4354 proceed (-1, TARGET_SIGNAL_0, 0);
4357 /* Async version of extended_remote_create_inferior. */
4359 extended_remote_async_create_inferior (char *exec_file, char *args, char **env,
4362 /* Rip out the breakpoints; we'll reinsert them after restarting
4363 the remote server. */
4364 remove_breakpoints ();
4366 /* If running asynchronously, register the target file descriptor
4367 with the event loop. */
4368 if (target_can_async_p ())
4369 target_async (inferior_event_handler, 0);
4371 /* Now restart the remote server. */
4372 extended_remote_restart ();
4374 /* Now put the breakpoints back in. This way we're safe if the
4375 restart function works via a unix fork on the remote side. */
4376 insert_breakpoints ();
4378 /* Clean up from the last time we were running. */
4379 clear_proceed_status ();
4381 /* Let the remote process run. */
4382 proceed (-1, TARGET_SIGNAL_0, 0);
4386 /* On some machines, e.g. 68k, we may use a different breakpoint
4387 instruction than other targets; in those use
4388 DEPRECATED_REMOTE_BREAKPOINT instead of just BREAKPOINT_FROM_PC.
4389 Also, bi-endian targets may define
4390 DEPRECATED_LITTLE_REMOTE_BREAKPOINT and
4391 DEPRECATED_BIG_REMOTE_BREAKPOINT. If none of these are defined, we
4392 just call the standard routines that are in mem-break.c. */
4394 /* NOTE: cagney/2003-06-08: This is silly. A remote and simulator
4395 target should use an identical BREAKPOINT_FROM_PC. As for native,
4396 the ARCH-OS-tdep.c code can override the default. */
4398 #if defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && defined (DEPRECATED_BIG_REMOTE_BREAKPOINT) && !defined(DEPRECATED_REMOTE_BREAKPOINT)
4399 #define DEPRECATED_REMOTE_BREAKPOINT
4402 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4404 /* If the target isn't bi-endian, just pretend it is. */
4405 #if !defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && !defined (DEPRECATED_BIG_REMOTE_BREAKPOINT)
4406 #define DEPRECATED_LITTLE_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
4407 #define DEPRECATED_BIG_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
4410 static unsigned char big_break_insn[] = DEPRECATED_BIG_REMOTE_BREAKPOINT;
4411 static unsigned char little_break_insn[] = DEPRECATED_LITTLE_REMOTE_BREAKPOINT;
4413 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4415 /* Insert a breakpoint on targets that don't have any better
4416 breakpoint support. We read the contents of the target location
4417 and stash it, then overwrite it with a breakpoint instruction.
4418 ADDR is the target location in the target machine. CONTENTS_CACHE
4419 is a pointer to memory allocated for saving the target contents.
4420 It is guaranteed by the caller to be long enough to save the number
4421 of bytes returned by BREAKPOINT_FROM_PC. */
4424 remote_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
4426 struct remote_state *rs = get_remote_state ();
4427 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4432 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
4433 If it succeeds, then set the support to PACKET_ENABLE. If it
4434 fails, and the user has explicitly requested the Z support then
4435 report an error, otherwise, mark it disabled and go on. */
4437 if (remote_protocol_Z[Z_PACKET_SOFTWARE_BP].support != PACKET_DISABLE)
4439 char *buf = alloca (rs->remote_packet_size);
4442 addr = remote_address_masked (addr);
4446 p += hexnumstr (p, (ULONGEST) addr);
4447 BREAKPOINT_FROM_PC (&addr, &bp_size);
4448 sprintf (p, ",%d", bp_size);
4451 getpkt (buf, (rs->remote_packet_size), 0);
4453 switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_SOFTWARE_BP]))
4459 case PACKET_UNKNOWN:
4464 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4465 val = target_read_memory (addr, contents_cache, sizeof big_break_insn);
4469 if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
4470 val = target_write_memory (addr, (char *) big_break_insn,
4471 sizeof big_break_insn);
4473 val = target_write_memory (addr, (char *) little_break_insn,
4474 sizeof little_break_insn);
4479 return memory_insert_breakpoint (addr, contents_cache);
4480 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4484 remote_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
4486 struct remote_state *rs = get_remote_state ();
4489 if (remote_protocol_Z[Z_PACKET_SOFTWARE_BP].support != PACKET_DISABLE)
4491 char *buf = alloca (rs->remote_packet_size);
4498 addr = remote_address_masked (addr);
4499 p += hexnumstr (p, (ULONGEST) addr);
4500 BREAKPOINT_FROM_PC (&addr, &bp_size);
4501 sprintf (p, ",%d", bp_size);
4504 getpkt (buf, (rs->remote_packet_size), 0);
4506 return (buf[0] == 'E');
4509 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4510 return target_write_memory (addr, contents_cache, sizeof big_break_insn);
4512 return memory_remove_breakpoint (addr, contents_cache);
4513 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4517 watchpoint_to_Z_packet (int type)
4531 internal_error (__FILE__, __LINE__,
4532 "hw_bp_to_z: bad watchpoint type %d", type);
4537 remote_insert_watchpoint (CORE_ADDR addr, int len, int type)
4539 struct remote_state *rs = get_remote_state ();
4540 char *buf = alloca (rs->remote_packet_size);
4542 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
4544 if (remote_protocol_Z[packet].support == PACKET_DISABLE)
4545 error ("Can't set hardware watchpoints without the '%s' (%s) packet\n",
4546 remote_protocol_Z[packet].name,
4547 remote_protocol_Z[packet].title);
4549 sprintf (buf, "Z%x,", packet);
4550 p = strchr (buf, '\0');
4551 addr = remote_address_masked (addr);
4552 p += hexnumstr (p, (ULONGEST) addr);
4553 sprintf (p, ",%x", len);
4556 getpkt (buf, (rs->remote_packet_size), 0);
4558 switch (packet_ok (buf, &remote_protocol_Z[packet]))
4561 case PACKET_UNKNOWN:
4566 internal_error (__FILE__, __LINE__,
4567 "remote_insert_watchpoint: reached end of function");
4572 remote_remove_watchpoint (CORE_ADDR addr, int len, int type)
4574 struct remote_state *rs = get_remote_state ();
4575 char *buf = alloca (rs->remote_packet_size);
4577 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
4579 if (remote_protocol_Z[packet].support == PACKET_DISABLE)
4580 error ("Can't clear hardware watchpoints without the '%s' (%s) packet\n",
4581 remote_protocol_Z[packet].name,
4582 remote_protocol_Z[packet].title);
4584 sprintf (buf, "z%x,", packet);
4585 p = strchr (buf, '\0');
4586 addr = remote_address_masked (addr);
4587 p += hexnumstr (p, (ULONGEST) addr);
4588 sprintf (p, ",%x", len);
4590 getpkt (buf, (rs->remote_packet_size), 0);
4592 switch (packet_ok (buf, &remote_protocol_Z[packet]))
4595 case PACKET_UNKNOWN:
4600 internal_error (__FILE__, __LINE__,
4601 "remote_remove_watchpoint: reached end of function");
4605 int remote_hw_watchpoint_limit = -1;
4606 int remote_hw_breakpoint_limit = -1;
4609 remote_check_watch_resources (int type, int cnt, int ot)
4611 if (type == bp_hardware_breakpoint)
4613 if (remote_hw_breakpoint_limit == 0)
4615 else if (remote_hw_breakpoint_limit < 0)
4617 else if (cnt <= remote_hw_breakpoint_limit)
4622 if (remote_hw_watchpoint_limit == 0)
4624 else if (remote_hw_watchpoint_limit < 0)
4628 else if (cnt <= remote_hw_watchpoint_limit)
4635 remote_stopped_by_watchpoint (void)
4637 return remote_stopped_by_watchpoint_p;
4640 extern int stepped_after_stopped_by_watchpoint;
4643 remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
4646 if (remote_stopped_by_watchpoint ()
4647 || stepped_after_stopped_by_watchpoint)
4649 *addr_p = remote_watch_data_address;
4658 remote_insert_hw_breakpoint (CORE_ADDR addr, char *shadow)
4661 struct remote_state *rs = get_remote_state ();
4662 char *buf = alloca (rs->remote_packet_size);
4665 /* The length field should be set to the size of a breakpoint
4668 BREAKPOINT_FROM_PC (&addr, &len);
4670 if (remote_protocol_Z[Z_PACKET_HARDWARE_BP].support == PACKET_DISABLE)
4671 error ("Can't set hardware breakpoint without the '%s' (%s) packet\n",
4672 remote_protocol_Z[Z_PACKET_HARDWARE_BP].name,
4673 remote_protocol_Z[Z_PACKET_HARDWARE_BP].title);
4679 addr = remote_address_masked (addr);
4680 p += hexnumstr (p, (ULONGEST) addr);
4681 sprintf (p, ",%x", len);
4684 getpkt (buf, (rs->remote_packet_size), 0);
4686 switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_HARDWARE_BP]))
4689 case PACKET_UNKNOWN:
4694 internal_error (__FILE__, __LINE__,
4695 "remote_insert_hw_breakpoint: reached end of function");
4700 remote_remove_hw_breakpoint (CORE_ADDR addr, char *shadow)
4703 struct remote_state *rs = get_remote_state ();
4704 char *buf = alloca (rs->remote_packet_size);
4707 /* The length field should be set to the size of a breakpoint
4710 BREAKPOINT_FROM_PC (&addr, &len);
4712 if (remote_protocol_Z[Z_PACKET_HARDWARE_BP].support == PACKET_DISABLE)
4713 error ("Can't clear hardware breakpoint without the '%s' (%s) packet\n",
4714 remote_protocol_Z[Z_PACKET_HARDWARE_BP].name,
4715 remote_protocol_Z[Z_PACKET_HARDWARE_BP].title);
4721 addr = remote_address_masked (addr);
4722 p += hexnumstr (p, (ULONGEST) addr);
4723 sprintf (p, ",%x", len);
4726 getpkt (buf, (rs->remote_packet_size), 0);
4728 switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_HARDWARE_BP]))
4731 case PACKET_UNKNOWN:
4736 internal_error (__FILE__, __LINE__,
4737 "remote_remove_hw_breakpoint: reached end of function");
4740 /* Some targets are only capable of doing downloads, and afterwards
4741 they switch to the remote serial protocol. This function provides
4742 a clean way to get from the download target to the remote target.
4743 It's basically just a wrapper so that we don't have to expose any
4744 of the internal workings of remote.c.
4746 Prior to calling this routine, you should shutdown the current
4747 target code, else you will get the "A program is being debugged
4748 already..." message. Usually a call to pop_target() suffices. */
4751 push_remote_target (char *name, int from_tty)
4753 printf_filtered ("Switching to remote protocol\n");
4754 remote_open (name, from_tty);
4757 /* Table used by the crc32 function to calcuate the checksum. */
4759 static unsigned long crc32_table[256] =
4762 static unsigned long
4763 crc32 (unsigned char *buf, int len, unsigned int crc)
4765 if (!crc32_table[1])
4767 /* Initialize the CRC table and the decoding table. */
4771 for (i = 0; i < 256; i++)
4773 for (c = i << 24, j = 8; j > 0; --j)
4774 c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
4781 crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255];
4787 /* compare-sections command
4789 With no arguments, compares each loadable section in the exec bfd
4790 with the same memory range on the target, and reports mismatches.
4791 Useful for verifying the image on the target against the exec file.
4792 Depends on the target understanding the new "qCRC:" request. */
4794 /* FIXME: cagney/1999-10-26: This command should be broken down into a
4795 target method (target verify memory) and generic version of the
4796 actual command. This will allow other high-level code (especially
4797 generic_load()) to make use of this target functionality. */
4800 compare_sections_command (char *args, int from_tty)
4802 struct remote_state *rs = get_remote_state ();
4804 unsigned long host_crc, target_crc;
4805 extern bfd *exec_bfd;
4806 struct cleanup *old_chain;
4809 const char *sectname;
4810 char *buf = alloca (rs->remote_packet_size);
4817 error ("command cannot be used without an exec file");
4818 if (!current_target.to_shortname ||
4819 strcmp (current_target.to_shortname, "remote") != 0)
4820 error ("command can only be used with remote target");
4822 for (s = exec_bfd->sections; s; s = s->next)
4824 if (!(s->flags & SEC_LOAD))
4825 continue; /* skip non-loadable section */
4827 size = bfd_get_section_size (s);
4829 continue; /* skip zero-length section */
4831 sectname = bfd_get_section_name (exec_bfd, s);
4832 if (args && strcmp (args, sectname) != 0)
4833 continue; /* not the section selected by user */
4835 matched = 1; /* do this section */
4837 /* FIXME: assumes lma can fit into long */
4838 sprintf (buf, "qCRC:%lx,%lx", (long) lma, (long) size);
4841 /* be clever; compute the host_crc before waiting for target reply */
4842 sectdata = xmalloc (size);
4843 old_chain = make_cleanup (xfree, sectdata);
4844 bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
4845 host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff);
4847 getpkt (buf, (rs->remote_packet_size), 0);
4849 error ("target memory fault, section %s, range 0x%s -- 0x%s",
4850 sectname, paddr (lma), paddr (lma + size));
4852 error ("remote target does not support this operation");
4854 for (target_crc = 0, tmp = &buf[1]; *tmp; tmp++)
4855 target_crc = target_crc * 16 + fromhex (*tmp);
4857 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
4858 sectname, paddr (lma), paddr (lma + size));
4859 if (host_crc == target_crc)
4860 printf_filtered ("matched.\n");
4863 printf_filtered ("MIS-MATCHED!\n");
4867 do_cleanups (old_chain);
4870 warning ("One or more sections of the remote executable does not match\n\
4871 the loaded file\n");
4872 if (args && !matched)
4873 printf_filtered ("No loaded section named '%s'.\n", args);
4877 remote_xfer_partial (struct target_ops *ops, enum target_object object,
4878 const char *annex, void *readbuf, const void *writebuf,
4879 ULONGEST offset, LONGEST len)
4881 struct remote_state *rs = get_remote_state ();
4883 char *buf2 = alloca (rs->remote_packet_size);
4884 char *p2 = &buf2[0];
4887 /* Handle memory using remote_xfer_memory. */
4888 if (object == TARGET_OBJECT_MEMORY)
4893 if (writebuf != NULL)
4895 void *buffer = xmalloc (len);
4896 struct cleanup *cleanup = make_cleanup (xfree, buffer);
4897 memcpy (buffer, writebuf, len);
4898 xfered = remote_xfer_memory (offset, buffer, len, 1, NULL, ops);
4899 do_cleanups (cleanup);
4902 xfered = remote_xfer_memory (offset, readbuf, len, 0, NULL, ops);
4906 else if (xfered == 0 && errno == 0)
4912 /* Only handle reads. */
4913 if (writebuf != NULL || readbuf == NULL)
4916 /* Map pre-existing objects onto letters. DO NOT do this for new
4917 objects!!! Instead specify new query packets. */
4920 case TARGET_OBJECT_KOD:
4923 case TARGET_OBJECT_AVR:
4927 case TARGET_OBJECT_AUXV:
4928 if (remote_protocol_qPart_auxv.support != PACKET_DISABLE)
4930 unsigned int total = 0;
4933 LONGEST n = min ((rs->remote_packet_size - 2) / 2, len);
4934 snprintf (buf2, rs->remote_packet_size,
4935 "qPart:auxv:read::%s,%s",
4936 phex_nz (offset, sizeof offset),
4937 phex_nz (n, sizeof n));
4940 return total > 0 ? total : i;
4942 getpkt (buf2, rs->remote_packet_size, 0);
4943 if (packet_ok (buf2, &remote_protocol_qPart_auxv) != PACKET_OK)
4944 return total > 0 ? total : -1;
4945 if (buf2[0] == 'O' && buf2[1] == 'K' && buf2[2] == '\0')
4946 break; /* Got EOF indicator. */
4947 /* Got some data. */
4948 i = hex2bin (buf2, readbuf, len);
4951 readbuf = (void *) ((char *) readbuf + i);
4965 /* Note: a zero OFFSET and LEN can be used to query the minimum
4967 if (offset == 0 && len == 0)
4968 return (rs->remote_packet_size);
4969 /* Minimum outbuf size is (rs->remote_packet_size) - if bufsiz is
4970 not large enough let the caller. */
4971 if (len < (rs->remote_packet_size))
4973 len = rs->remote_packet_size;
4975 /* except for querying the minimum buffer size, target must be open */
4977 error ("remote query is only available after target open");
4979 gdb_assert (annex != NULL);
4980 gdb_assert (readbuf != NULL);
4985 /* we used one buffer char for the remote protocol q command and another
4986 for the query type. As the remote protocol encapsulation uses 4 chars
4987 plus one extra in case we are debugging (remote_debug),
4988 we have PBUFZIZ - 7 left to pack the query string */
4990 while (annex[i] && (i < ((rs->remote_packet_size) - 8)))
4992 /* Bad caller may have sent forbidden characters. */
4993 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
4998 gdb_assert (annex[i] == '\0');
5004 getpkt (readbuf, len, 0);
5006 return strlen (readbuf);
5010 remote_rcmd (char *command,
5011 struct ui_file *outbuf)
5013 struct remote_state *rs = get_remote_state ();
5015 char *buf = alloca (rs->remote_packet_size);
5019 error ("remote rcmd is only available after target open");
5021 /* Send a NULL command across as an empty command */
5022 if (command == NULL)
5025 /* The query prefix */
5026 strcpy (buf, "qRcmd,");
5027 p = strchr (buf, '\0');
5029 if ((strlen (buf) + strlen (command) * 2 + 8/*misc*/) > (rs->remote_packet_size))
5030 error ("\"monitor\" command ``%s'' is too long\n", command);
5032 /* Encode the actual command */
5033 bin2hex (command, p, 0);
5035 if (putpkt (buf) < 0)
5036 error ("Communication problem with target\n");
5038 /* get/display the response */
5041 /* XXX - see also tracepoint.c:remote_get_noisy_reply() */
5043 getpkt (buf, (rs->remote_packet_size), 0);
5045 error ("Target does not support this command\n");
5046 if (buf[0] == 'O' && buf[1] != 'K')
5048 remote_console_output (buf + 1); /* 'O' message from stub */
5051 if (strcmp (buf, "OK") == 0)
5053 if (strlen (buf) == 3 && buf[0] == 'E'
5054 && isdigit (buf[1]) && isdigit (buf[2]))
5056 error ("Protocol error with Rcmd");
5058 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
5060 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
5061 fputc_unfiltered (c, outbuf);
5068 packet_command (char *args, int from_tty)
5070 struct remote_state *rs = get_remote_state ();
5071 char *buf = alloca (rs->remote_packet_size);
5074 error ("command can only be used with remote target");
5077 error ("remote-packet command requires packet text as argument");
5079 puts_filtered ("sending: ");
5080 print_packet (args);
5081 puts_filtered ("\n");
5084 getpkt (buf, (rs->remote_packet_size), 0);
5085 puts_filtered ("received: ");
5087 puts_filtered ("\n");
5091 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------------- */
5093 static void display_thread_info (struct gdb_ext_thread_info *info);
5095 static void threadset_test_cmd (char *cmd, int tty);
5097 static void threadalive_test (char *cmd, int tty);
5099 static void threadlist_test_cmd (char *cmd, int tty);
5101 int get_and_display_threadinfo (threadref * ref);
5103 static void threadinfo_test_cmd (char *cmd, int tty);
5105 static int thread_display_step (threadref * ref, void *context);
5107 static void threadlist_update_test_cmd (char *cmd, int tty);
5109 static void init_remote_threadtests (void);
5111 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid */
5114 threadset_test_cmd (char *cmd, int tty)
5116 int sample_thread = SAMPLE_THREAD;
5118 printf_filtered ("Remote threadset test\n");
5119 set_thread (sample_thread, 1);
5124 threadalive_test (char *cmd, int tty)
5126 int sample_thread = SAMPLE_THREAD;
5128 if (remote_thread_alive (pid_to_ptid (sample_thread)))
5129 printf_filtered ("PASS: Thread alive test\n");
5131 printf_filtered ("FAIL: Thread alive test\n");
5134 void output_threadid (char *title, threadref * ref);
5137 output_threadid (char *title, threadref *ref)
5141 pack_threadid (&hexid[0], ref); /* Convert threead id into hex */
5143 printf_filtered ("%s %s\n", title, (&hexid[0]));
5147 threadlist_test_cmd (char *cmd, int tty)
5150 threadref nextthread;
5151 int done, result_count;
5152 threadref threadlist[3];
5154 printf_filtered ("Remote Threadlist test\n");
5155 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
5156 &result_count, &threadlist[0]))
5157 printf_filtered ("FAIL: threadlist test\n");
5160 threadref *scan = threadlist;
5161 threadref *limit = scan + result_count;
5163 while (scan < limit)
5164 output_threadid (" thread ", scan++);
5169 display_thread_info (struct gdb_ext_thread_info *info)
5171 output_threadid ("Threadid: ", &info->threadid);
5172 printf_filtered ("Name: %s\n ", info->shortname);
5173 printf_filtered ("State: %s\n", info->display);
5174 printf_filtered ("other: %s\n\n", info->more_display);
5178 get_and_display_threadinfo (threadref *ref)
5182 struct gdb_ext_thread_info threadinfo;
5184 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
5185 | TAG_MOREDISPLAY | TAG_DISPLAY;
5186 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
5187 display_thread_info (&threadinfo);
5192 threadinfo_test_cmd (char *cmd, int tty)
5194 int athread = SAMPLE_THREAD;
5198 int_to_threadref (&thread, athread);
5199 printf_filtered ("Remote Threadinfo test\n");
5200 if (!get_and_display_threadinfo (&thread))
5201 printf_filtered ("FAIL cannot get thread info\n");
5205 thread_display_step (threadref *ref, void *context)
5207 /* output_threadid(" threadstep ",ref); *//* simple test */
5208 return get_and_display_threadinfo (ref);
5212 threadlist_update_test_cmd (char *cmd, int tty)
5214 printf_filtered ("Remote Threadlist update test\n");
5215 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
5219 init_remote_threadtests (void)
5221 add_com ("tlist", class_obscure, threadlist_test_cmd,
5222 "Fetch and print the remote list of thread identifiers, one pkt only");
5223 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
5224 "Fetch and display info about one thread");
5225 add_com ("tset", class_obscure, threadset_test_cmd,
5226 "Test setting to a different thread");
5227 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
5228 "Iterate through updating all remote thread info");
5229 add_com ("talive", class_obscure, threadalive_test,
5230 " Remote thread alive test ");
5235 /* Convert a thread ID to a string. Returns the string in a static
5239 remote_pid_to_str (ptid_t ptid)
5241 static char buf[30];
5243 sprintf (buf, "Thread %d", PIDGET (ptid));
5248 init_remote_ops (void)
5250 remote_ops.to_shortname = "remote";
5251 remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
5253 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5254 Specify the serial device it is connected to\n\
5255 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
5256 remote_ops.to_open = remote_open;
5257 remote_ops.to_close = remote_close;
5258 remote_ops.to_detach = remote_detach;
5259 remote_ops.to_disconnect = remote_disconnect;
5260 remote_ops.to_resume = remote_resume;
5261 remote_ops.to_wait = remote_wait;
5262 remote_ops.to_fetch_registers = remote_fetch_registers;
5263 remote_ops.to_store_registers = remote_store_registers;
5264 remote_ops.to_prepare_to_store = remote_prepare_to_store;
5265 remote_ops.deprecated_xfer_memory = remote_xfer_memory;
5266 remote_ops.to_files_info = remote_files_info;
5267 remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
5268 remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
5269 remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
5270 remote_ops.to_stopped_data_address = remote_stopped_data_address;
5271 remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
5272 remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
5273 remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
5274 remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
5275 remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
5276 remote_ops.to_kill = remote_kill;
5277 remote_ops.to_load = generic_load;
5278 remote_ops.to_mourn_inferior = remote_mourn;
5279 remote_ops.to_thread_alive = remote_thread_alive;
5280 remote_ops.to_find_new_threads = remote_threads_info;
5281 remote_ops.to_pid_to_str = remote_pid_to_str;
5282 remote_ops.to_extra_thread_info = remote_threads_extra_info;
5283 remote_ops.to_stop = remote_stop;
5284 remote_ops.to_xfer_partial = remote_xfer_partial;
5285 remote_ops.to_rcmd = remote_rcmd;
5286 remote_ops.to_stratum = process_stratum;
5287 remote_ops.to_has_all_memory = 1;
5288 remote_ops.to_has_memory = 1;
5289 remote_ops.to_has_stack = 1;
5290 remote_ops.to_has_registers = 1;
5291 remote_ops.to_has_execution = 1;
5292 remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
5293 remote_ops.to_magic = OPS_MAGIC;
5296 /* Set up the extended remote vector by making a copy of the standard
5297 remote vector and adding to it. */
5300 init_extended_remote_ops (void)
5302 extended_remote_ops = remote_ops;
5304 extended_remote_ops.to_shortname = "extended-remote";
5305 extended_remote_ops.to_longname =
5306 "Extended remote serial target in gdb-specific protocol";
5307 extended_remote_ops.to_doc =
5308 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5309 Specify the serial device it is connected to (e.g. /dev/ttya).",
5310 extended_remote_ops.to_open = extended_remote_open;
5311 extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
5312 extended_remote_ops.to_mourn_inferior = extended_remote_mourn;
5316 remote_can_async_p (void)
5318 /* We're async whenever the serial device is. */
5319 return (current_target.to_async_mask_value) && serial_can_async_p (remote_desc);
5323 remote_is_async_p (void)
5325 /* We're async whenever the serial device is. */
5326 return (current_target.to_async_mask_value) && serial_is_async_p (remote_desc);
5329 /* Pass the SERIAL event on and up to the client. One day this code
5330 will be able to delay notifying the client of an event until the
5331 point where an entire packet has been received. */
5333 static void (*async_client_callback) (enum inferior_event_type event_type, void *context);
5334 static void *async_client_context;
5335 static serial_event_ftype remote_async_serial_handler;
5338 remote_async_serial_handler (struct serial *scb, void *context)
5340 /* Don't propogate error information up to the client. Instead let
5341 the client find out about the error by querying the target. */
5342 async_client_callback (INF_REG_EVENT, async_client_context);
5346 remote_async (void (*callback) (enum inferior_event_type event_type, void *context), void *context)
5348 if (current_target.to_async_mask_value == 0)
5349 internal_error (__FILE__, __LINE__,
5350 "Calling remote_async when async is masked");
5352 if (callback != NULL)
5354 serial_async (remote_desc, remote_async_serial_handler, NULL);
5355 async_client_callback = callback;
5356 async_client_context = context;
5359 serial_async (remote_desc, NULL, NULL);
5362 /* Target async and target extended-async.
5364 This are temporary targets, until it is all tested. Eventually
5365 async support will be incorporated int the usual 'remote'
5369 init_remote_async_ops (void)
5371 remote_async_ops.to_shortname = "async";
5372 remote_async_ops.to_longname = "Remote serial target in async version of the gdb-specific protocol";
5373 remote_async_ops.to_doc =
5374 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5375 Specify the serial device it is connected to (e.g. /dev/ttya).";
5376 remote_async_ops.to_open = remote_async_open;
5377 remote_async_ops.to_close = remote_close;
5378 remote_async_ops.to_detach = remote_detach;
5379 remote_async_ops.to_disconnect = remote_disconnect;
5380 remote_async_ops.to_resume = remote_async_resume;
5381 remote_async_ops.to_wait = remote_async_wait;
5382 remote_async_ops.to_fetch_registers = remote_fetch_registers;
5383 remote_async_ops.to_store_registers = remote_store_registers;
5384 remote_async_ops.to_prepare_to_store = remote_prepare_to_store;
5385 remote_async_ops.deprecated_xfer_memory = remote_xfer_memory;
5386 remote_async_ops.to_files_info = remote_files_info;
5387 remote_async_ops.to_insert_breakpoint = remote_insert_breakpoint;
5388 remote_async_ops.to_remove_breakpoint = remote_remove_breakpoint;
5389 remote_async_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
5390 remote_async_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
5391 remote_async_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
5392 remote_async_ops.to_insert_watchpoint = remote_insert_watchpoint;
5393 remote_async_ops.to_remove_watchpoint = remote_remove_watchpoint;
5394 remote_async_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
5395 remote_async_ops.to_stopped_data_address = remote_stopped_data_address;
5396 remote_async_ops.to_terminal_inferior = remote_async_terminal_inferior;
5397 remote_async_ops.to_terminal_ours = remote_async_terminal_ours;
5398 remote_async_ops.to_kill = remote_async_kill;
5399 remote_async_ops.to_load = generic_load;
5400 remote_async_ops.to_mourn_inferior = remote_async_mourn;
5401 remote_async_ops.to_thread_alive = remote_thread_alive;
5402 remote_async_ops.to_find_new_threads = remote_threads_info;
5403 remote_async_ops.to_pid_to_str = remote_pid_to_str;
5404 remote_async_ops.to_extra_thread_info = remote_threads_extra_info;
5405 remote_async_ops.to_stop = remote_stop;
5406 remote_async_ops.to_xfer_partial = remote_xfer_partial;
5407 remote_async_ops.to_rcmd = remote_rcmd;
5408 remote_async_ops.to_stratum = process_stratum;
5409 remote_async_ops.to_has_all_memory = 1;
5410 remote_async_ops.to_has_memory = 1;
5411 remote_async_ops.to_has_stack = 1;
5412 remote_async_ops.to_has_registers = 1;
5413 remote_async_ops.to_has_execution = 1;
5414 remote_async_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
5415 remote_async_ops.to_can_async_p = remote_can_async_p;
5416 remote_async_ops.to_is_async_p = remote_is_async_p;
5417 remote_async_ops.to_async = remote_async;
5418 remote_async_ops.to_async_mask_value = 1;
5419 remote_async_ops.to_magic = OPS_MAGIC;
5422 /* Set up the async extended remote vector by making a copy of the standard
5423 remote vector and adding to it. */
5426 init_extended_async_remote_ops (void)
5428 extended_async_remote_ops = remote_async_ops;
5430 extended_async_remote_ops.to_shortname = "extended-async";
5431 extended_async_remote_ops.to_longname =
5432 "Extended remote serial target in async gdb-specific protocol";
5433 extended_async_remote_ops.to_doc =
5434 "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
5435 Specify the serial device it is connected to (e.g. /dev/ttya).",
5436 extended_async_remote_ops.to_open = extended_remote_async_open;
5437 extended_async_remote_ops.to_create_inferior = extended_remote_async_create_inferior;
5438 extended_async_remote_ops.to_mourn_inferior = extended_remote_mourn;
5442 set_remote_cmd (char *args, int from_tty)
5447 show_remote_cmd (char *args, int from_tty)
5449 /* FIXME: cagney/2002-06-15: This function should iterate over
5450 remote_show_cmdlist for a list of sub commands to show. */
5451 show_remote_protocol_Z_packet_cmd (args, from_tty, NULL);
5452 show_remote_protocol_P_packet_cmd (args, from_tty, NULL);
5453 show_remote_protocol_p_packet_cmd (args, from_tty, NULL);
5454 show_remote_protocol_qSymbol_packet_cmd (args, from_tty, NULL);
5455 show_remote_protocol_vcont_packet_cmd (args, from_tty, NULL);
5456 show_remote_protocol_binary_download_cmd (args, from_tty, NULL);
5457 show_remote_protocol_qPart_auxv_packet_cmd (args, from_tty, NULL);
5461 build_remote_gdbarch_data (void)
5463 remote_address_size = TARGET_ADDR_BIT;
5466 /* Saved pointer to previous owner of the new_objfile event. */
5467 static void (*remote_new_objfile_chain) (struct objfile *);
5469 /* Function to be called whenever a new objfile (shlib) is detected. */
5471 remote_new_objfile (struct objfile *objfile)
5473 if (remote_desc != 0) /* Have a remote connection */
5475 remote_check_symbols (objfile);
5477 /* Call predecessor on chain, if any. */
5478 if (remote_new_objfile_chain != 0 &&
5480 remote_new_objfile_chain (objfile);
5484 _initialize_remote (void)
5486 static struct cmd_list_element *remote_set_cmdlist;
5487 static struct cmd_list_element *remote_show_cmdlist;
5488 struct cmd_list_element *tmpcmd;
5490 /* architecture specific data */
5491 remote_gdbarch_data_handle = gdbarch_data_register_post_init (init_remote_state);
5493 /* Old tacky stuff. NOTE: This comes after the remote protocol so
5494 that the remote protocol has been initialized. */
5495 DEPRECATED_REGISTER_GDBARCH_SWAP (remote_address_size);
5496 deprecated_register_gdbarch_swap (NULL, 0, build_remote_gdbarch_data);
5499 add_target (&remote_ops);
5501 init_extended_remote_ops ();
5502 add_target (&extended_remote_ops);
5504 init_remote_async_ops ();
5505 add_target (&remote_async_ops);
5507 init_extended_async_remote_ops ();
5508 add_target (&extended_async_remote_ops);
5510 /* Hook into new objfile notification. */
5511 remote_new_objfile_chain = deprecated_target_new_objfile_hook;
5512 deprecated_target_new_objfile_hook = remote_new_objfile;
5515 init_remote_threadtests ();
5518 /* set/show remote ... */
5520 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, "\
5521 Remote protocol specific variables\n\
5522 Configure various remote-protocol specific variables such as\n\
5523 the packets being used",
5524 &remote_set_cmdlist, "set remote ",
5525 0/*allow-unknown*/, &setlist);
5526 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, "\
5527 Remote protocol specific variables\n\
5528 Configure various remote-protocol specific variables such as\n\
5529 the packets being used",
5530 &remote_show_cmdlist, "show remote ",
5531 0/*allow-unknown*/, &showlist);
5533 add_cmd ("compare-sections", class_obscure, compare_sections_command,
5534 "Compare section data on target to the exec file.\n\
5535 Argument is a single section name (default: all loaded sections).",
5538 add_cmd ("packet", class_maintenance, packet_command,
5539 "Send an arbitrary packet to a remote target.\n\
5540 maintenance packet TEXT\n\
5541 If GDB is talking to an inferior via the GDB serial protocol, then\n\
5542 this command sends the string TEXT to the inferior, and displays the\n\
5543 response packet. GDB supplies the initial `$' character, and the\n\
5544 terminating `#' character and checksum.",
5547 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, "\
5548 Set whether to send break if interrupted.", "\
5549 Show whether to send break if interrupted.", "\
5550 If set, a break, instead of a cntrl-c, is sent to the remote target.", "\
5551 Whether to send break if interrupted is %s.",
5553 &setlist, &showlist);
5555 /* Install commands for configuring memory read/write packets. */
5557 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size,
5558 "Set the maximum number of bytes per memory write packet (deprecated).\n",
5560 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size,
5561 "Show the maximum number of bytes per memory write packet (deprecated).\n",
5563 add_cmd ("memory-write-packet-size", no_class,
5564 set_memory_write_packet_size,
5565 "Set the maximum number of bytes per memory-write packet.\n"
5566 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5567 "default packet size. The actual limit is further reduced\n"
5568 "dependent on the target. Specify ``fixed'' to disable the\n"
5569 "further restriction and ``limit'' to enable that restriction\n",
5570 &remote_set_cmdlist);
5571 add_cmd ("memory-read-packet-size", no_class,
5572 set_memory_read_packet_size,
5573 "Set the maximum number of bytes per memory-read packet.\n"
5574 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5575 "default packet size. The actual limit is further reduced\n"
5576 "dependent on the target. Specify ``fixed'' to disable the\n"
5577 "further restriction and ``limit'' to enable that restriction\n",
5578 &remote_set_cmdlist);
5579 add_cmd ("memory-write-packet-size", no_class,
5580 show_memory_write_packet_size,
5581 "Show the maximum number of bytes per memory-write packet.\n",
5582 &remote_show_cmdlist);
5583 add_cmd ("memory-read-packet-size", no_class,
5584 show_memory_read_packet_size,
5585 "Show the maximum number of bytes per memory-read packet.\n",
5586 &remote_show_cmdlist);
5588 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class,
5589 &remote_hw_watchpoint_limit, "\
5590 Set the maximum number of target hardware watchpoints.", "\
5591 Show the maximum number of target hardware watchpoints.", "\
5592 Specify a negative limit for unlimited.", "\
5593 The maximum number of target hardware watchpoints is %s.",
5595 &remote_set_cmdlist, &remote_show_cmdlist);
5596 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class,
5597 &remote_hw_breakpoint_limit, "\
5598 Set the maximum number of target hardware breakpoints.", "\
5599 Show the maximum number of target hardware breakpoints.", "\
5600 Specify a negative limit for unlimited.", "\
5601 The maximum number of target hardware breakpoints is %s.",
5603 &remote_set_cmdlist, &remote_show_cmdlist);
5605 deprecated_add_show_from_set
5606 (add_set_cmd ("remoteaddresssize", class_obscure,
5607 var_integer, (char *) &remote_address_size,
5608 "Set the maximum size of the address (in bits) \
5609 in a memory packet.\n",
5613 add_packet_config_cmd (&remote_protocol_binary_download,
5614 "X", "binary-download",
5615 set_remote_protocol_binary_download_cmd,
5616 show_remote_protocol_binary_download_cmd,
5617 &remote_set_cmdlist, &remote_show_cmdlist,
5620 /* XXXX - should ``set remotebinarydownload'' be retained for
5622 deprecated_add_show_from_set
5623 (add_set_cmd ("remotebinarydownload", no_class,
5624 var_boolean, (char *) &remote_binary_download,
5625 "Set binary downloads.\n", &setlist),
5629 add_packet_config_cmd (&remote_protocol_vcont,
5630 "vCont", "verbose-resume",
5631 set_remote_protocol_vcont_packet_cmd,
5632 show_remote_protocol_vcont_packet_cmd,
5633 &remote_set_cmdlist, &remote_show_cmdlist,
5636 add_packet_config_cmd (&remote_protocol_qSymbol,
5637 "qSymbol", "symbol-lookup",
5638 set_remote_protocol_qSymbol_packet_cmd,
5639 show_remote_protocol_qSymbol_packet_cmd,
5640 &remote_set_cmdlist, &remote_show_cmdlist,
5643 add_packet_config_cmd (&remote_protocol_P,
5644 "P", "set-register",
5645 set_remote_protocol_P_packet_cmd,
5646 show_remote_protocol_P_packet_cmd,
5647 &remote_set_cmdlist, &remote_show_cmdlist,
5650 add_packet_config_cmd (&remote_protocol_p,
5651 "p", "fetch-register",
5652 set_remote_protocol_p_packet_cmd,
5653 show_remote_protocol_p_packet_cmd,
5654 &remote_set_cmdlist, &remote_show_cmdlist,
5657 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP],
5658 "Z0", "software-breakpoint",
5659 set_remote_protocol_Z_software_bp_packet_cmd,
5660 show_remote_protocol_Z_software_bp_packet_cmd,
5661 &remote_set_cmdlist, &remote_show_cmdlist,
5664 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_HARDWARE_BP],
5665 "Z1", "hardware-breakpoint",
5666 set_remote_protocol_Z_hardware_bp_packet_cmd,
5667 show_remote_protocol_Z_hardware_bp_packet_cmd,
5668 &remote_set_cmdlist, &remote_show_cmdlist,
5671 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_WRITE_WP],
5672 "Z2", "write-watchpoint",
5673 set_remote_protocol_Z_write_wp_packet_cmd,
5674 show_remote_protocol_Z_write_wp_packet_cmd,
5675 &remote_set_cmdlist, &remote_show_cmdlist,
5678 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_READ_WP],
5679 "Z3", "read-watchpoint",
5680 set_remote_protocol_Z_read_wp_packet_cmd,
5681 show_remote_protocol_Z_read_wp_packet_cmd,
5682 &remote_set_cmdlist, &remote_show_cmdlist,
5685 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_ACCESS_WP],
5686 "Z4", "access-watchpoint",
5687 set_remote_protocol_Z_access_wp_packet_cmd,
5688 show_remote_protocol_Z_access_wp_packet_cmd,
5689 &remote_set_cmdlist, &remote_show_cmdlist,
5692 add_packet_config_cmd (&remote_protocol_qPart_auxv,
5693 "qPart_auxv", "read-aux-vector",
5694 set_remote_protocol_qPart_auxv_packet_cmd,
5695 show_remote_protocol_qPart_auxv_packet_cmd,
5696 &remote_set_cmdlist, &remote_show_cmdlist,
5699 /* Keep the old ``set remote Z-packet ...'' working. */
5700 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
5701 &remote_Z_packet_detect, "\
5702 Set use of remote protocol `Z' packets", "\
5703 Show use of remote protocol `Z' packets ", "\
5704 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
5706 Use of remote protocol `Z' packets is %s",
5707 set_remote_protocol_Z_packet_cmd,
5708 show_remote_protocol_Z_packet_cmd,
5709 &remote_set_cmdlist, &remote_show_cmdlist);
5711 /* Eventually initialize fileio. See fileio.c */
5712 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);