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 <sys/types.h>
50 #include "event-loop.h"
51 #include "event-top.h"
57 #include "gdbcore.h" /* for exec_bfd */
59 #include "remote-fileio.h"
61 /* Prototypes for local functions */
62 static void cleanup_sigint_signal_handler (void *dummy);
63 static void initialize_sigint_signal_handler (void);
64 static int getpkt_sane (char *buf, long sizeof_buf, int forever);
66 static void handle_remote_sigint (int);
67 static void handle_remote_sigint_twice (int);
68 static void async_remote_interrupt (gdb_client_data);
69 void async_remote_interrupt_twice (gdb_client_data);
71 static void build_remote_gdbarch_data (void);
73 static void remote_files_info (struct target_ops *ignore);
75 static int remote_xfer_memory (CORE_ADDR memaddr, char *myaddr,
76 int len, int should_write,
77 struct mem_attrib *attrib,
78 struct target_ops *target);
80 static void remote_prepare_to_store (void);
82 static void remote_fetch_registers (int regno);
84 static void remote_resume (ptid_t ptid, int step,
85 enum target_signal siggnal);
86 static void remote_async_resume (ptid_t ptid, int step,
87 enum target_signal siggnal);
88 static int remote_start_remote (struct ui_out *uiout, void *dummy);
90 static void remote_open (char *name, int from_tty);
91 static void remote_async_open (char *name, int from_tty);
93 static void extended_remote_open (char *name, int from_tty);
94 static void extended_remote_async_open (char *name, int from_tty);
96 static void remote_open_1 (char *, int, struct target_ops *, int extended_p,
99 static void remote_close (int quitting);
101 static void remote_store_registers (int regno);
103 static void remote_mourn (void);
104 static void remote_async_mourn (void);
106 static void extended_remote_restart (void);
108 static void extended_remote_mourn (void);
110 static void extended_remote_create_inferior (char *, char *, char **);
111 static void extended_remote_async_create_inferior (char *, char *, char **);
113 static void remote_mourn_1 (struct target_ops *);
115 static void remote_send (char *buf, long sizeof_buf);
117 static int readchar (int timeout);
119 static ptid_t remote_wait (ptid_t ptid,
120 struct target_waitstatus *status);
121 static ptid_t remote_async_wait (ptid_t ptid,
122 struct target_waitstatus *status);
124 static void remote_kill (void);
125 static void remote_async_kill (void);
127 static int tohex (int nib);
129 static void remote_detach (char *args, int from_tty);
131 static void remote_interrupt (int signo);
133 static void remote_interrupt_twice (int signo);
135 static void interrupt_query (void);
137 static void set_thread (int, int);
139 static int remote_thread_alive (ptid_t);
141 static void get_offsets (void);
143 static long read_frame (char *buf, long sizeof_buf);
145 static int remote_insert_breakpoint (CORE_ADDR, char *);
147 static int remote_remove_breakpoint (CORE_ADDR, char *);
149 static int hexnumlen (ULONGEST num);
151 static void init_remote_ops (void);
153 static void init_extended_remote_ops (void);
155 static void remote_stop (void);
157 static int ishex (int ch, int *val);
159 static int stubhex (int ch);
161 static int hexnumstr (char *, ULONGEST);
163 static int hexnumnstr (char *, ULONGEST, int);
165 static CORE_ADDR remote_address_masked (CORE_ADDR);
167 static void print_packet (char *);
169 static unsigned long crc32 (unsigned char *, int, unsigned int);
171 static void compare_sections_command (char *, int);
173 static void packet_command (char *, int);
175 static int stub_unpack_int (char *buff, int fieldlength);
177 static ptid_t remote_current_thread (ptid_t oldptid);
179 static void remote_find_new_threads (void);
181 static void record_currthread (int currthread);
183 static int fromhex (int a);
185 static int hex2bin (const char *hex, char *bin, int count);
187 static int bin2hex (const char *bin, char *hex, int count);
189 static int putpkt_binary (char *buf, int cnt);
191 static void check_binary_download (CORE_ADDR addr);
193 struct packet_config;
195 static void show_packet_config_cmd (struct packet_config *config);
197 static void update_packet_config (struct packet_config *config);
199 void _initialize_remote (void);
201 /* Description of the remote protocol. Strictly speaking, when the
202 target is open()ed, remote.c should create a per-target description
203 of the remote protocol using that target's architecture.
204 Unfortunately, the target stack doesn't include local state. For
205 the moment keep the information in the target's architecture
210 long offset; /* Offset into G packet. */
211 long regnum; /* GDB's internal register number. */
212 LONGEST pnum; /* Remote protocol register number. */
213 int in_g_packet; /* Always part of G packet. */
214 /* long size in bytes; == DEPRECATED_REGISTER_RAW_SIZE (regnum); at present. */
215 /* char *name; == REGISTER_NAME (regnum); at present. */
220 /* Description of the remote protocol registers. */
221 long sizeof_g_packet;
223 /* Description of the remote protocol registers indexed by REGNUM
224 (making an array of NUM_REGS + NUM_PSEUDO_REGS in size). */
225 struct packet_reg *regs;
227 /* This is the size (in chars) of the first response to the ``g''
228 packet. It is used as a heuristic when determining the maximum
229 size of memory-read and memory-write packets. A target will
230 typically only reserve a buffer large enough to hold the ``g''
231 packet. The size does not include packet overhead (headers and
233 long actual_register_packet_size;
235 /* This is the maximum size (in chars) of a non read/write packet.
236 It is also used as a cap on the size of read/write packets. */
237 long remote_packet_size;
241 /* Handle for retreving the remote protocol data from gdbarch. */
242 static struct gdbarch_data *remote_gdbarch_data_handle;
244 static struct remote_state *
245 get_remote_state (void)
247 return gdbarch_data (current_gdbarch, remote_gdbarch_data_handle);
251 init_remote_state (struct gdbarch *gdbarch)
254 struct remote_state *rs = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_state);
256 if (DEPRECATED_REGISTER_BYTES != 0)
257 rs->sizeof_g_packet = DEPRECATED_REGISTER_BYTES;
259 rs->sizeof_g_packet = 0;
261 /* Assume a 1:1 regnum<->pnum table. */
262 rs->regs = GDBARCH_OBSTACK_CALLOC (gdbarch, NUM_REGS + NUM_PSEUDO_REGS,
264 for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++)
266 struct packet_reg *r = &rs->regs[regnum];
269 r->offset = DEPRECATED_REGISTER_BYTE (regnum);
270 r->in_g_packet = (regnum < NUM_REGS);
271 /* ...name = REGISTER_NAME (regnum); */
273 /* Compute packet size by accumulating the size of all registers. */
274 if (DEPRECATED_REGISTER_BYTES == 0)
275 rs->sizeof_g_packet += register_size (current_gdbarch, regnum);
278 /* Default maximum number of characters in a packet body. Many
279 remote stubs have a hardwired buffer size of 400 bytes
280 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
281 as the maximum packet-size to ensure that the packet and an extra
282 NUL character can always fit in the buffer. This stops GDB
283 trashing stubs that try to squeeze an extra NUL into what is
284 already a full buffer (As of 1999-12-04 that was most stubs. */
285 rs->remote_packet_size = 400 - 1;
287 /* Should rs->sizeof_g_packet needs more space than the
288 default, adjust the size accordingly. Remember that each byte is
289 encoded as two characters. 32 is the overhead for the packet
290 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
291 (``$NN:G...#NN'') is a better guess, the below has been padded a
293 if (rs->sizeof_g_packet > ((rs->remote_packet_size - 32) / 2))
294 rs->remote_packet_size = (rs->sizeof_g_packet * 2 + 32);
296 /* This one is filled in when a ``g'' packet is received. */
297 rs->actual_register_packet_size = 0;
302 static struct packet_reg *
303 packet_reg_from_regnum (struct remote_state *rs, long regnum)
305 if (regnum < 0 && regnum >= NUM_REGS + NUM_PSEUDO_REGS)
309 struct packet_reg *r = &rs->regs[regnum];
310 gdb_assert (r->regnum == regnum);
315 static struct packet_reg *
316 packet_reg_from_pnum (struct remote_state *rs, LONGEST pnum)
319 for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++)
321 struct packet_reg *r = &rs->regs[i];
328 /* FIXME: graces/2002-08-08: These variables should eventually be
329 bound to an instance of the target object (as in gdbarch-tdep()),
330 when such a thing exists. */
332 /* This is set to the data address of the access causing the target
333 to stop for a watchpoint. */
334 static CORE_ADDR remote_watch_data_address;
336 /* This is non-zero if taregt stopped for a watchpoint. */
337 static int remote_stopped_by_watchpoint_p;
340 static struct target_ops remote_ops;
342 static struct target_ops extended_remote_ops;
344 /* Temporary target ops. Just like the remote_ops and
345 extended_remote_ops, but with asynchronous support. */
346 static struct target_ops remote_async_ops;
348 static struct target_ops extended_async_remote_ops;
350 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
351 ``forever'' still use the normal timeout mechanism. This is
352 currently used by the ASYNC code to guarentee that target reads
353 during the initial connect always time-out. Once getpkt has been
354 modified to return a timeout indication and, in turn
355 remote_wait()/wait_for_inferior() have gained a timeout parameter
357 static int wait_forever_enabled_p = 1;
360 /* This variable chooses whether to send a ^C or a break when the user
361 requests program interruption. Although ^C is usually what remote
362 systems expect, and that is the default here, sometimes a break is
363 preferable instead. */
365 static int remote_break;
367 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
368 remote_open knows that we don't have a file open when the program
370 static struct serial *remote_desc = NULL;
372 /* This variable sets the number of bits in an address that are to be
373 sent in a memory ("M" or "m") packet. Normally, after stripping
374 leading zeros, the entire address would be sent. This variable
375 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
376 initial implementation of remote.c restricted the address sent in
377 memory packets to ``host::sizeof long'' bytes - (typically 32
378 bits). Consequently, for 64 bit targets, the upper 32 bits of an
379 address was never sent. Since fixing this bug may cause a break in
380 some remote targets this variable is principly provided to
381 facilitate backward compatibility. */
383 static int remote_address_size;
385 /* Tempoary to track who currently owns the terminal. See
386 target_async_terminal_* for more details. */
388 static int remote_async_terminal_ours_p;
391 /* User configurable variables for the number of characters in a
392 memory read/write packet. MIN ((rs->remote_packet_size),
393 rs->sizeof_g_packet) is the default. Some targets need smaller
394 values (fifo overruns, et.al.) and some users need larger values
395 (speed up transfers). The variables ``preferred_*'' (the user
396 request), ``current_*'' (what was actually set) and ``forced_*''
397 (Positive - a soft limit, negative - a hard limit). */
399 struct memory_packet_config
406 /* Compute the current size of a read/write packet. Since this makes
407 use of ``actual_register_packet_size'' the computation is dynamic. */
410 get_memory_packet_size (struct memory_packet_config *config)
412 struct remote_state *rs = get_remote_state ();
413 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
414 law?) that some hosts don't cope very well with large alloca()
415 calls. Eventually the alloca() code will be replaced by calls to
416 xmalloc() and make_cleanups() allowing this restriction to either
417 be lifted or removed. */
418 #ifndef MAX_REMOTE_PACKET_SIZE
419 #define MAX_REMOTE_PACKET_SIZE 16384
421 /* NOTE: 16 is just chosen at random. */
422 #ifndef MIN_REMOTE_PACKET_SIZE
423 #define MIN_REMOTE_PACKET_SIZE 16
428 if (config->size <= 0)
429 what_they_get = MAX_REMOTE_PACKET_SIZE;
431 what_they_get = config->size;
435 what_they_get = (rs->remote_packet_size);
436 /* Limit the packet to the size specified by the user. */
438 && what_they_get > config->size)
439 what_they_get = config->size;
440 /* Limit it to the size of the targets ``g'' response. */
441 if ((rs->actual_register_packet_size) > 0
442 && what_they_get > (rs->actual_register_packet_size))
443 what_they_get = (rs->actual_register_packet_size);
445 if (what_they_get > MAX_REMOTE_PACKET_SIZE)
446 what_they_get = MAX_REMOTE_PACKET_SIZE;
447 if (what_they_get < MIN_REMOTE_PACKET_SIZE)
448 what_they_get = MIN_REMOTE_PACKET_SIZE;
449 return what_they_get;
452 /* Update the size of a read/write packet. If they user wants
453 something really big then do a sanity check. */
456 set_memory_packet_size (char *args, struct memory_packet_config *config)
458 int fixed_p = config->fixed_p;
459 long size = config->size;
461 error ("Argument required (integer, `fixed' or `limited').");
462 else if (strcmp (args, "hard") == 0
463 || strcmp (args, "fixed") == 0)
465 else if (strcmp (args, "soft") == 0
466 || strcmp (args, "limit") == 0)
471 size = strtoul (args, &end, 0);
473 error ("Invalid %s (bad syntax).", config->name);
475 /* Instead of explicitly capping the size of a packet to
476 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
477 instead allowed to set the size to something arbitrarily
479 if (size > MAX_REMOTE_PACKET_SIZE)
480 error ("Invalid %s (too large).", config->name);
484 if (fixed_p && !config->fixed_p)
486 if (! query ("The target may not be able to correctly handle a %s\n"
487 "of %ld bytes. Change the packet size? ",
489 error ("Packet size not changed.");
491 /* Update the config. */
492 config->fixed_p = fixed_p;
497 show_memory_packet_size (struct memory_packet_config *config)
499 printf_filtered ("The %s is %ld. ", config->name, config->size);
501 printf_filtered ("Packets are fixed at %ld bytes.\n",
502 get_memory_packet_size (config));
504 printf_filtered ("Packets are limited to %ld bytes.\n",
505 get_memory_packet_size (config));
508 static struct memory_packet_config memory_write_packet_config =
510 "memory-write-packet-size",
514 set_memory_write_packet_size (char *args, int from_tty)
516 set_memory_packet_size (args, &memory_write_packet_config);
520 show_memory_write_packet_size (char *args, int from_tty)
522 show_memory_packet_size (&memory_write_packet_config);
526 get_memory_write_packet_size (void)
528 return get_memory_packet_size (&memory_write_packet_config);
531 static struct memory_packet_config memory_read_packet_config =
533 "memory-read-packet-size",
537 set_memory_read_packet_size (char *args, int from_tty)
539 set_memory_packet_size (args, &memory_read_packet_config);
543 show_memory_read_packet_size (char *args, int from_tty)
545 show_memory_packet_size (&memory_read_packet_config);
549 get_memory_read_packet_size (void)
551 struct remote_state *rs = get_remote_state ();
552 long size = get_memory_packet_size (&memory_read_packet_config);
553 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
554 extra buffer size argument before the memory read size can be
555 increased beyond (rs->remote_packet_size). */
556 if (size > (rs->remote_packet_size))
557 size = (rs->remote_packet_size);
562 /* Generic configuration support for packets the stub optionally
563 supports. Allows the user to specify the use of the packet as well
564 as allowing GDB to auto-detect support in the remote stub. */
568 PACKET_SUPPORT_UNKNOWN = 0,
577 enum auto_boolean detect;
578 enum packet_support support;
581 /* Analyze a packet's return value and update the packet config
592 update_packet_config (struct packet_config *config)
594 switch (config->detect)
596 case AUTO_BOOLEAN_TRUE:
597 config->support = PACKET_ENABLE;
599 case AUTO_BOOLEAN_FALSE:
600 config->support = PACKET_DISABLE;
602 case AUTO_BOOLEAN_AUTO:
603 config->support = PACKET_SUPPORT_UNKNOWN;
609 show_packet_config_cmd (struct packet_config *config)
611 char *support = "internal-error";
612 switch (config->support)
618 support = "disabled";
620 case PACKET_SUPPORT_UNKNOWN:
624 switch (config->detect)
626 case AUTO_BOOLEAN_AUTO:
627 printf_filtered ("Support for remote protocol `%s' (%s) packet is auto-detected, currently %s.\n",
628 config->name, config->title, support);
630 case AUTO_BOOLEAN_TRUE:
631 case AUTO_BOOLEAN_FALSE:
632 printf_filtered ("Support for remote protocol `%s' (%s) packet is currently %s.\n",
633 config->name, config->title, support);
639 add_packet_config_cmd (struct packet_config *config,
642 cmd_sfunc_ftype *set_func,
643 cmd_sfunc_ftype *show_func,
644 struct cmd_list_element **set_remote_list,
645 struct cmd_list_element **show_remote_list,
648 struct cmd_list_element *set_cmd;
649 struct cmd_list_element *show_cmd;
654 config->title = title;
655 config->detect = AUTO_BOOLEAN_AUTO;
656 config->support = PACKET_SUPPORT_UNKNOWN;
657 xasprintf (&set_doc, "Set use of remote protocol `%s' (%s) packet",
659 xasprintf (&show_doc, "Show current use of remote protocol `%s' (%s) packet",
661 /* set/show TITLE-packet {auto,on,off} */
662 xasprintf (&cmd_name, "%s-packet", title);
663 add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
664 &config->detect, set_doc, show_doc,
666 set_remote_list, show_remote_list);
667 /* set/show remote NAME-packet {auto,on,off} -- legacy */
671 xasprintf (&legacy_name, "%s-packet", name);
672 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
674 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
679 static enum packet_result
680 packet_ok (const char *buf, struct packet_config *config)
684 /* The stub recognized the packet request. Check that the
685 operation succeeded. */
686 switch (config->support)
688 case PACKET_SUPPORT_UNKNOWN:
690 fprintf_unfiltered (gdb_stdlog,
691 "Packet %s (%s) is supported\n",
692 config->name, config->title);
693 config->support = PACKET_ENABLE;
696 internal_error (__FILE__, __LINE__,
697 "packet_ok: attempt to use a disabled packet");
702 if (buf[0] == 'O' && buf[1] == 'K' && buf[2] == '\0')
703 /* "OK" - definitly OK. */
706 && isxdigit (buf[1]) && isxdigit (buf[2])
708 /* "Enn" - definitly an error. */
710 /* The packet may or may not be OK. Just assume it is */
715 /* The stub does not support the packet. */
716 switch (config->support)
719 if (config->detect == AUTO_BOOLEAN_AUTO)
720 /* If the stub previously indicated that the packet was
721 supported then there is a protocol error.. */
722 error ("Protocol error: %s (%s) conflicting enabled responses.",
723 config->name, config->title);
725 /* The user set it wrong. */
726 error ("Enabled packet %s (%s) not recognized by stub",
727 config->name, config->title);
729 case PACKET_SUPPORT_UNKNOWN:
731 fprintf_unfiltered (gdb_stdlog,
732 "Packet %s (%s) is NOT supported\n",
733 config->name, config->title);
734 config->support = PACKET_DISABLE;
739 return PACKET_UNKNOWN;
743 /* Should we try the 'vCont' (descriptive resume) request? */
744 static struct packet_config remote_protocol_vcont;
747 set_remote_protocol_vcont_packet_cmd (char *args, int from_tty,
748 struct cmd_list_element *c)
750 update_packet_config (&remote_protocol_vcont);
754 show_remote_protocol_vcont_packet_cmd (char *args, int from_tty,
755 struct cmd_list_element *c)
757 show_packet_config_cmd (&remote_protocol_vcont);
760 /* Should we try the 'qSymbol' (target symbol lookup service) request? */
761 static struct packet_config remote_protocol_qSymbol;
764 set_remote_protocol_qSymbol_packet_cmd (char *args, int from_tty,
765 struct cmd_list_element *c)
767 update_packet_config (&remote_protocol_qSymbol);
771 show_remote_protocol_qSymbol_packet_cmd (char *args, int from_tty,
772 struct cmd_list_element *c)
774 show_packet_config_cmd (&remote_protocol_qSymbol);
777 /* Should we try the 'e' (step over range) request? */
778 static struct packet_config remote_protocol_e;
781 set_remote_protocol_e_packet_cmd (char *args, int from_tty,
782 struct cmd_list_element *c)
784 update_packet_config (&remote_protocol_e);
788 show_remote_protocol_e_packet_cmd (char *args, int from_tty,
789 struct cmd_list_element *c)
791 show_packet_config_cmd (&remote_protocol_e);
795 /* Should we try the 'E' (step over range / w signal #) request? */
796 static struct packet_config remote_protocol_E;
799 set_remote_protocol_E_packet_cmd (char *args, int from_tty,
800 struct cmd_list_element *c)
802 update_packet_config (&remote_protocol_E);
806 show_remote_protocol_E_packet_cmd (char *args, int from_tty,
807 struct cmd_list_element *c)
809 show_packet_config_cmd (&remote_protocol_E);
813 /* Should we try the 'P' (set register) request? */
815 static struct packet_config remote_protocol_P;
818 set_remote_protocol_P_packet_cmd (char *args, int from_tty,
819 struct cmd_list_element *c)
821 update_packet_config (&remote_protocol_P);
825 show_remote_protocol_P_packet_cmd (char *args, int from_tty,
826 struct cmd_list_element *c)
828 show_packet_config_cmd (&remote_protocol_P);
831 /* Should we try one of the 'Z' requests? */
835 Z_PACKET_SOFTWARE_BP,
836 Z_PACKET_HARDWARE_BP,
843 static struct packet_config remote_protocol_Z[NR_Z_PACKET_TYPES];
845 /* FIXME: Instead of having all these boiler plate functions, the
846 command callback should include a context argument. */
849 set_remote_protocol_Z_software_bp_packet_cmd (char *args, int from_tty,
850 struct cmd_list_element *c)
852 update_packet_config (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP]);
856 show_remote_protocol_Z_software_bp_packet_cmd (char *args, int from_tty,
857 struct cmd_list_element *c)
859 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP]);
863 set_remote_protocol_Z_hardware_bp_packet_cmd (char *args, int from_tty,
864 struct cmd_list_element *c)
866 update_packet_config (&remote_protocol_Z[Z_PACKET_HARDWARE_BP]);
870 show_remote_protocol_Z_hardware_bp_packet_cmd (char *args, int from_tty,
871 struct cmd_list_element *c)
873 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_HARDWARE_BP]);
877 set_remote_protocol_Z_write_wp_packet_cmd (char *args, int from_tty,
878 struct cmd_list_element *c)
880 update_packet_config (&remote_protocol_Z[Z_PACKET_WRITE_WP]);
884 show_remote_protocol_Z_write_wp_packet_cmd (char *args, int from_tty,
885 struct cmd_list_element *c)
887 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_WRITE_WP]);
891 set_remote_protocol_Z_read_wp_packet_cmd (char *args, int from_tty,
892 struct cmd_list_element *c)
894 update_packet_config (&remote_protocol_Z[Z_PACKET_READ_WP]);
898 show_remote_protocol_Z_read_wp_packet_cmd (char *args, int from_tty,
899 struct cmd_list_element *c)
901 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_READ_WP]);
905 set_remote_protocol_Z_access_wp_packet_cmd (char *args, int from_tty,
906 struct cmd_list_element *c)
908 update_packet_config (&remote_protocol_Z[Z_PACKET_ACCESS_WP]);
912 show_remote_protocol_Z_access_wp_packet_cmd (char *args, int from_tty,
913 struct cmd_list_element *c)
915 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_ACCESS_WP]);
918 /* For compatibility with older distributions. Provide a ``set remote
919 Z-packet ...'' command that updates all the Z packet types. */
921 static enum auto_boolean remote_Z_packet_detect;
924 set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
925 struct cmd_list_element *c)
928 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
930 remote_protocol_Z[i].detect = remote_Z_packet_detect;
931 update_packet_config (&remote_protocol_Z[i]);
936 show_remote_protocol_Z_packet_cmd (char *args, int from_tty,
937 struct cmd_list_element *c)
940 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
942 show_packet_config_cmd (&remote_protocol_Z[i]);
946 /* Should we try the 'X' (remote binary download) packet?
948 This variable (available to the user via "set remote X-packet")
949 dictates whether downloads are sent in binary (via the 'X' packet).
950 We assume that the stub can, and attempt to do it. This will be
951 cleared if the stub does not understand it. This switch is still
952 needed, though in cases when the packet is supported in the stub,
953 but the connection does not allow it (i.e., 7-bit serial connection
956 static struct packet_config remote_protocol_binary_download;
958 /* Should we try the 'ThreadInfo' query packet?
960 This variable (NOT available to the user: auto-detect only!)
961 determines whether GDB will use the new, simpler "ThreadInfo"
962 query or the older, more complex syntax for thread queries.
963 This is an auto-detect variable (set to true at each connect,
964 and set to false when the target fails to recognize it). */
966 static int use_threadinfo_query;
967 static int use_threadextra_query;
970 set_remote_protocol_binary_download_cmd (char *args,
972 struct cmd_list_element *c)
974 update_packet_config (&remote_protocol_binary_download);
978 show_remote_protocol_binary_download_cmd (char *args, int from_tty,
979 struct cmd_list_element *c)
981 show_packet_config_cmd (&remote_protocol_binary_download);
984 /* Should we try the 'qPart:auxv' (target auxiliary vector read) request? */
985 static struct packet_config remote_protocol_qPart_auxv;
988 set_remote_protocol_qPart_auxv_packet_cmd (char *args, int from_tty,
989 struct cmd_list_element *c)
991 update_packet_config (&remote_protocol_qPart_auxv);
995 show_remote_protocol_qPart_auxv_packet_cmd (char *args, int from_tty,
996 struct cmd_list_element *c)
998 show_packet_config_cmd (&remote_protocol_qPart_auxv);
1001 /* Should we try the 'qPart:dirty' (target dirty register read) request? */
1002 static struct packet_config remote_protocol_qPart_dirty;
1005 set_remote_protocol_qPart_dirty_packet_cmd (char *args, int from_tty,
1006 struct cmd_list_element *c)
1008 update_packet_config (&remote_protocol_qPart_dirty);
1012 show_remote_protocol_qPart_dirty_packet_cmd (char *args, int from_tty,
1013 struct cmd_list_element *c)
1015 show_packet_config_cmd (&remote_protocol_qPart_dirty);
1019 /* Tokens for use by the asynchronous signal handlers for SIGINT */
1020 static void *sigint_remote_twice_token;
1021 static void *sigint_remote_token;
1023 /* These are pointers to hook functions that may be set in order to
1024 modify resume/wait behavior for a particular architecture. */
1026 void (*target_resume_hook) (void);
1027 void (*target_wait_loop_hook) (void);
1031 /* These are the threads which we last sent to the remote system.
1032 -1 for all or -2 for not sent yet. */
1033 static int general_thread;
1034 static int continue_thread;
1036 /* Call this function as a result of
1037 1) A halt indication (T packet) containing a thread id
1038 2) A direct query of currthread
1039 3) Successful execution of set thread
1043 record_currthread (int currthread)
1045 general_thread = currthread;
1047 /* If this is a new thread, add it to GDB's thread list.
1048 If we leave it up to WFI to do this, bad things will happen. */
1049 if (!in_thread_list (pid_to_ptid (currthread)))
1051 add_thread (pid_to_ptid (currthread));
1052 ui_out_text (uiout, "[New ");
1053 ui_out_text (uiout, target_pid_to_str (pid_to_ptid (currthread)));
1054 ui_out_text (uiout, "]\n");
1058 #define MAGIC_NULL_PID 42000
1061 set_thread (int th, int gen)
1063 struct remote_state *rs = get_remote_state ();
1064 char *buf = alloca (rs->remote_packet_size);
1065 int state = gen ? general_thread : continue_thread;
1071 buf[1] = gen ? 'g' : 'c';
1072 if (th == MAGIC_NULL_PID)
1078 sprintf (&buf[2], "-%x", -th);
1080 sprintf (&buf[2], "%x", th);
1082 getpkt (buf, (rs->remote_packet_size), 0);
1084 general_thread = th;
1086 continue_thread = th;
1089 /* Return nonzero if the thread TH is still alive on the remote system. */
1092 remote_thread_alive (ptid_t ptid)
1094 int tid = PIDGET (ptid);
1098 sprintf (buf, "T-%08x", -tid);
1100 sprintf (buf, "T%08x", tid);
1102 getpkt (buf, sizeof (buf), 0);
1103 return (buf[0] == 'O' && buf[1] == 'K');
1106 /* About these extended threadlist and threadinfo packets. They are
1107 variable length packets but, the fields within them are often fixed
1108 length. They are redundent enough to send over UDP as is the
1109 remote protocol in general. There is a matching unit test module
1112 #define OPAQUETHREADBYTES 8
1114 /* a 64 bit opaque identifier */
1115 typedef unsigned char threadref[OPAQUETHREADBYTES];
1117 /* WARNING: This threadref data structure comes from the remote O.S., libstub
1118 protocol encoding, and remote.c. it is not particularly changable */
1120 /* Right now, the internal structure is int. We want it to be bigger.
1124 typedef int gdb_threadref; /* internal GDB thread reference */
1126 /* gdb_ext_thread_info is an internal GDB data structure which is
1127 equivalint to the reply of the remote threadinfo packet */
1129 struct gdb_ext_thread_info
1131 threadref threadid; /* External form of thread reference */
1132 int active; /* Has state interesting to GDB? , regs, stack */
1133 char display[256]; /* Brief state display, name, blocked/syspended */
1134 char shortname[32]; /* To be used to name threads */
1135 char more_display[256]; /* Long info, statistics, queue depth, whatever */
1138 /* The volume of remote transfers can be limited by submitting
1139 a mask containing bits specifying the desired information.
1140 Use a union of these values as the 'selection' parameter to
1141 get_thread_info. FIXME: Make these TAG names more thread specific.
1144 #define TAG_THREADID 1
1145 #define TAG_EXISTS 2
1146 #define TAG_DISPLAY 4
1147 #define TAG_THREADNAME 8
1148 #define TAG_MOREDISPLAY 16
1150 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES*2)
1152 char *unpack_varlen_hex (char *buff, ULONGEST *result);
1154 static char *unpack_nibble (char *buf, int *val);
1156 static char *pack_nibble (char *buf, int nibble);
1158 static char *pack_hex_byte (char *pkt, int /*unsigned char */ byte);
1160 static char *unpack_byte (char *buf, int *value);
1162 static char *pack_int (char *buf, int value);
1164 static char *unpack_int (char *buf, int *value);
1166 static char *unpack_string (char *src, char *dest, int length);
1168 static char *pack_threadid (char *pkt, threadref * id);
1170 static char *unpack_threadid (char *inbuf, threadref * id);
1172 void int_to_threadref (threadref * id, int value);
1174 static int threadref_to_int (threadref * ref);
1176 static void copy_threadref (threadref * dest, threadref * src);
1178 static int threadmatch (threadref * dest, threadref * src);
1180 static char *pack_threadinfo_request (char *pkt, int mode, threadref * id);
1182 static int remote_unpack_thread_info_response (char *pkt,
1183 threadref * expectedref,
1184 struct gdb_ext_thread_info
1188 static int remote_get_threadinfo (threadref * threadid, int fieldset, /*TAG mask */
1189 struct gdb_ext_thread_info *info);
1191 static char *pack_threadlist_request (char *pkt, int startflag,
1193 threadref * nextthread);
1195 static int parse_threadlist_response (char *pkt,
1197 threadref * original_echo,
1198 threadref * resultlist, int *doneflag);
1200 static int remote_get_threadlist (int startflag,
1201 threadref * nextthread,
1204 int *result_count, threadref * threadlist);
1206 typedef int (*rmt_thread_action) (threadref * ref, void *context);
1208 static int remote_threadlist_iterator (rmt_thread_action stepfunction,
1209 void *context, int looplimit);
1211 static int remote_newthread_step (threadref * ref, void *context);
1213 /* encode 64 bits in 16 chars of hex */
1215 static const char hexchars[] = "0123456789abcdef";
1218 ishex (int ch, int *val)
1220 if ((ch >= 'a') && (ch <= 'f'))
1222 *val = ch - 'a' + 10;
1225 if ((ch >= 'A') && (ch <= 'F'))
1227 *val = ch - 'A' + 10;
1230 if ((ch >= '0') && (ch <= '9'))
1241 if (ch >= 'a' && ch <= 'f')
1242 return ch - 'a' + 10;
1243 if (ch >= '0' && ch <= '9')
1245 if (ch >= 'A' && ch <= 'F')
1246 return ch - 'A' + 10;
1251 stub_unpack_int (char *buff, int fieldlength)
1258 nibble = stubhex (*buff++);
1262 retval = retval << 4;
1268 unpack_varlen_hex (char *buff, /* packet to parse */
1274 while (ishex (*buff, &nibble))
1277 retval = retval << 4;
1278 retval |= nibble & 0x0f;
1285 unpack_nibble (char *buf, int *val)
1287 ishex (*buf++, val);
1292 pack_nibble (char *buf, int nibble)
1294 *buf++ = hexchars[(nibble & 0x0f)];
1299 pack_hex_byte (char *pkt, int byte)
1301 *pkt++ = hexchars[(byte >> 4) & 0xf];
1302 *pkt++ = hexchars[(byte & 0xf)];
1307 unpack_byte (char *buf, int *value)
1309 *value = stub_unpack_int (buf, 2);
1314 pack_int (char *buf, int value)
1316 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
1317 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
1318 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
1319 buf = pack_hex_byte (buf, (value & 0xff));
1324 unpack_int (char *buf, int *value)
1326 *value = stub_unpack_int (buf, 8);
1330 #if 0 /* currently unused, uncomment when needed */
1331 static char *pack_string (char *pkt, char *string);
1334 pack_string (char *pkt, char *string)
1339 len = strlen (string);
1341 len = 200; /* Bigger than most GDB packets, junk??? */
1342 pkt = pack_hex_byte (pkt, len);
1346 if ((ch == '\0') || (ch == '#'))
1347 ch = '*'; /* Protect encapsulation */
1352 #endif /* 0 (unused) */
1355 unpack_string (char *src, char *dest, int length)
1364 pack_threadid (char *pkt, threadref *id)
1367 unsigned char *altid;
1369 altid = (unsigned char *) id;
1370 limit = pkt + BUF_THREAD_ID_SIZE;
1372 pkt = pack_hex_byte (pkt, *altid++);
1378 unpack_threadid (char *inbuf, threadref *id)
1381 char *limit = inbuf + BUF_THREAD_ID_SIZE;
1384 altref = (char *) id;
1386 while (inbuf < limit)
1388 x = stubhex (*inbuf++);
1389 y = stubhex (*inbuf++);
1390 *altref++ = (x << 4) | y;
1395 /* Externally, threadrefs are 64 bits but internally, they are still
1396 ints. This is due to a mismatch of specifications. We would like
1397 to use 64bit thread references internally. This is an adapter
1401 int_to_threadref (threadref *id, int value)
1403 unsigned char *scan;
1405 scan = (unsigned char *) id;
1411 *scan++ = (value >> 24) & 0xff;
1412 *scan++ = (value >> 16) & 0xff;
1413 *scan++ = (value >> 8) & 0xff;
1414 *scan++ = (value & 0xff);
1418 threadref_to_int (threadref *ref)
1421 unsigned char *scan;
1423 scan = (char *) ref;
1427 value = (value << 8) | ((*scan++) & 0xff);
1432 copy_threadref (threadref *dest, threadref *src)
1435 unsigned char *csrc, *cdest;
1437 csrc = (unsigned char *) src;
1438 cdest = (unsigned char *) dest;
1445 threadmatch (threadref *dest, threadref *src)
1447 /* things are broken right now, so just assume we got a match */
1449 unsigned char *srcp, *destp;
1451 srcp = (char *) src;
1452 destp = (char *) dest;
1456 result &= (*srcp++ == *destp++) ? 1 : 0;
1463 threadid:1, # always request threadid
1470 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1473 pack_threadinfo_request (char *pkt, int mode, threadref *id)
1475 *pkt++ = 'q'; /* Info Query */
1476 *pkt++ = 'P'; /* process or thread info */
1477 pkt = pack_int (pkt, mode); /* mode */
1478 pkt = pack_threadid (pkt, id); /* threadid */
1479 *pkt = '\0'; /* terminate */
1483 /* These values tag the fields in a thread info response packet */
1484 /* Tagging the fields allows us to request specific fields and to
1485 add more fields as time goes by */
1487 #define TAG_THREADID 1 /* Echo the thread identifier */
1488 #define TAG_EXISTS 2 /* Is this process defined enough to
1489 fetch registers and its stack */
1490 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1491 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is */
1492 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1496 remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
1497 struct gdb_ext_thread_info *info)
1499 struct remote_state *rs = get_remote_state ();
1503 char *limit = pkt + (rs->remote_packet_size); /* plausable parsing limit */
1506 /* info->threadid = 0; FIXME: implement zero_threadref */
1508 info->display[0] = '\0';
1509 info->shortname[0] = '\0';
1510 info->more_display[0] = '\0';
1512 /* Assume the characters indicating the packet type have been stripped */
1513 pkt = unpack_int (pkt, &mask); /* arg mask */
1514 pkt = unpack_threadid (pkt, &ref);
1517 warning ("Incomplete response to threadinfo request\n");
1518 if (!threadmatch (&ref, expectedref))
1519 { /* This is an answer to a different request */
1520 warning ("ERROR RMT Thread info mismatch\n");
1523 copy_threadref (&info->threadid, &ref);
1525 /* Loop on tagged fields , try to bail if somthing goes wrong */
1527 while ((pkt < limit) && mask && *pkt) /* packets are terminated with nulls */
1529 pkt = unpack_int (pkt, &tag); /* tag */
1530 pkt = unpack_byte (pkt, &length); /* length */
1531 if (!(tag & mask)) /* tags out of synch with mask */
1533 warning ("ERROR RMT: threadinfo tag mismatch\n");
1537 if (tag == TAG_THREADID)
1541 warning ("ERROR RMT: length of threadid is not 16\n");
1545 pkt = unpack_threadid (pkt, &ref);
1546 mask = mask & ~TAG_THREADID;
1549 if (tag == TAG_EXISTS)
1551 info->active = stub_unpack_int (pkt, length);
1553 mask = mask & ~(TAG_EXISTS);
1556 warning ("ERROR RMT: 'exists' length too long\n");
1562 if (tag == TAG_THREADNAME)
1564 pkt = unpack_string (pkt, &info->shortname[0], length);
1565 mask = mask & ~TAG_THREADNAME;
1568 if (tag == TAG_DISPLAY)
1570 pkt = unpack_string (pkt, &info->display[0], length);
1571 mask = mask & ~TAG_DISPLAY;
1574 if (tag == TAG_MOREDISPLAY)
1576 pkt = unpack_string (pkt, &info->more_display[0], length);
1577 mask = mask & ~TAG_MOREDISPLAY;
1580 warning ("ERROR RMT: unknown thread info tag\n");
1581 break; /* Not a tag we know about */
1587 remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
1588 struct gdb_ext_thread_info *info)
1590 struct remote_state *rs = get_remote_state ();
1592 char *threadinfo_pkt = alloca (rs->remote_packet_size);
1594 pack_threadinfo_request (threadinfo_pkt, fieldset, threadid);
1595 putpkt (threadinfo_pkt);
1596 getpkt (threadinfo_pkt, (rs->remote_packet_size), 0);
1597 result = remote_unpack_thread_info_response (threadinfo_pkt + 2, threadid,
1602 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1605 pack_threadlist_request (char *pkt, int startflag, int threadcount,
1606 threadref *nextthread)
1608 *pkt++ = 'q'; /* info query packet */
1609 *pkt++ = 'L'; /* Process LIST or threadLIST request */
1610 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
1611 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
1612 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
1617 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1620 parse_threadlist_response (char *pkt, int result_limit,
1621 threadref *original_echo, threadref *resultlist,
1624 struct remote_state *rs = get_remote_state ();
1626 int count, resultcount, done;
1629 /* Assume the 'q' and 'M chars have been stripped. */
1630 limit = pkt + ((rs->remote_packet_size) - BUF_THREAD_ID_SIZE); /* done parse past here */
1631 pkt = unpack_byte (pkt, &count); /* count field */
1632 pkt = unpack_nibble (pkt, &done);
1633 /* The first threadid is the argument threadid. */
1634 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
1635 while ((count-- > 0) && (pkt < limit))
1637 pkt = unpack_threadid (pkt, resultlist++);
1638 if (resultcount++ >= result_limit)
1647 remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
1648 int *done, int *result_count, threadref *threadlist)
1650 struct remote_state *rs = get_remote_state ();
1651 static threadref echo_nextthread;
1652 char *threadlist_packet = alloca (rs->remote_packet_size);
1653 char *t_response = alloca (rs->remote_packet_size);
1656 /* Trancate result limit to be smaller than the packet size */
1657 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= (rs->remote_packet_size))
1658 result_limit = ((rs->remote_packet_size) / BUF_THREAD_ID_SIZE) - 2;
1660 pack_threadlist_request (threadlist_packet,
1661 startflag, result_limit, nextthread);
1662 putpkt (threadlist_packet);
1663 getpkt (t_response, (rs->remote_packet_size), 0);
1666 parse_threadlist_response (t_response + 2, result_limit, &echo_nextthread,
1669 if (!threadmatch (&echo_nextthread, nextthread))
1671 /* FIXME: This is a good reason to drop the packet */
1672 /* Possably, there is a duplicate response */
1674 retransmit immediatly - race conditions
1675 retransmit after timeout - yes
1677 wait for packet, then exit
1679 warning ("HMM: threadlist did not echo arg thread, dropping it\n");
1680 return 0; /* I choose simply exiting */
1682 if (*result_count <= 0)
1686 warning ("RMT ERROR : failed to get remote thread list\n");
1689 return result; /* break; */
1691 if (*result_count > result_limit)
1694 warning ("RMT ERROR: threadlist response longer than requested\n");
1700 /* This is the interface between remote and threads, remotes upper interface */
1702 /* remote_find_new_threads retrieves the thread list and for each
1703 thread in the list, looks up the thread in GDB's internal list,
1704 ading the thread if it does not already exist. This involves
1705 getting partial thread lists from the remote target so, polling the
1706 quit_flag is required. */
1709 /* About this many threadisds fit in a packet. */
1711 #define MAXTHREADLISTRESULTS 32
1714 remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
1717 int done, i, result_count;
1721 static threadref nextthread;
1722 static threadref resultthreadlist[MAXTHREADLISTRESULTS];
1727 if (loopcount++ > looplimit)
1730 warning ("Remote fetch threadlist -infinite loop-\n");
1733 if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS,
1734 &done, &result_count, resultthreadlist))
1739 /* clear for later iterations */
1741 /* Setup to resume next batch of thread references, set nextthread. */
1742 if (result_count >= 1)
1743 copy_threadref (&nextthread, &resultthreadlist[result_count - 1]);
1745 while (result_count--)
1746 if (!(result = (*stepfunction) (&resultthreadlist[i++], context)))
1753 remote_newthread_step (threadref *ref, void *context)
1757 ptid = pid_to_ptid (threadref_to_int (ref));
1759 if (!in_thread_list (ptid))
1761 return 1; /* continue iterator */
1764 #define CRAZY_MAX_THREADS 1000
1767 remote_current_thread (ptid_t oldpid)
1769 struct remote_state *rs = get_remote_state ();
1770 char *buf = alloca (rs->remote_packet_size);
1773 getpkt (buf, (rs->remote_packet_size), 0);
1774 if (buf[0] == 'Q' && buf[1] == 'C')
1775 return pid_to_ptid (strtol (&buf[2], NULL, 16));
1780 /* Find new threads for info threads command.
1781 * Original version, using John Metzler's thread protocol.
1785 remote_find_new_threads (void)
1787 remote_threadlist_iterator (remote_newthread_step, 0,
1789 if (PIDGET (inferior_ptid) == MAGIC_NULL_PID) /* ack ack ack */
1790 inferior_ptid = remote_current_thread (inferior_ptid);
1794 * Find all threads for info threads command.
1795 * Uses new thread protocol contributed by Cisco.
1796 * Falls back and attempts to use the older method (above)
1797 * if the target doesn't respond to the new method.
1801 remote_threads_info (void)
1803 struct remote_state *rs = get_remote_state ();
1804 char *buf = alloca (rs->remote_packet_size);
1808 if (remote_desc == 0) /* paranoia */
1809 error ("Command can only be used when connected to the remote target.");
1811 if (use_threadinfo_query)
1813 putpkt ("qfThreadInfo");
1815 getpkt (bufp, (rs->remote_packet_size), 0);
1816 if (bufp[0] != '\0') /* q packet recognized */
1818 while (*bufp++ == 'm') /* reply contains one or more TID */
1822 tid = strtol (bufp, &bufp, 16);
1823 if (tid != 0 && !in_thread_list (pid_to_ptid (tid)))
1824 add_thread (pid_to_ptid (tid));
1826 while (*bufp++ == ','); /* comma-separated list */
1827 putpkt ("qsThreadInfo");
1829 getpkt (bufp, (rs->remote_packet_size), 0);
1835 /* Else fall back to old method based on jmetzler protocol. */
1836 use_threadinfo_query = 0;
1837 remote_find_new_threads ();
1842 * Collect a descriptive string about the given thread.
1843 * The target may say anything it wants to about the thread
1844 * (typically info about its blocked / runnable state, name, etc.).
1845 * This string will appear in the info threads display.
1847 * Optional: targets are not required to implement this function.
1851 remote_threads_extra_info (struct thread_info *tp)
1853 struct remote_state *rs = get_remote_state ();
1857 struct gdb_ext_thread_info threadinfo;
1858 static char display_buf[100]; /* arbitrary... */
1859 char *bufp = alloca (rs->remote_packet_size);
1860 int n = 0; /* position in display_buf */
1862 if (remote_desc == 0) /* paranoia */
1863 internal_error (__FILE__, __LINE__,
1864 "remote_threads_extra_info");
1866 if (use_threadextra_query)
1868 sprintf (bufp, "qThreadExtraInfo,%x", PIDGET (tp->ptid));
1870 getpkt (bufp, (rs->remote_packet_size), 0);
1873 n = min (strlen (bufp) / 2, sizeof (display_buf));
1874 result = hex2bin (bufp, display_buf, n);
1875 display_buf [result] = '\0';
1880 /* If the above query fails, fall back to the old method. */
1881 use_threadextra_query = 0;
1882 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
1883 | TAG_MOREDISPLAY | TAG_DISPLAY;
1884 int_to_threadref (&id, PIDGET (tp->ptid));
1885 if (remote_get_threadinfo (&id, set, &threadinfo))
1886 if (threadinfo.active)
1888 if (*threadinfo.shortname)
1889 n += sprintf(&display_buf[0], " Name: %s,", threadinfo.shortname);
1890 if (*threadinfo.display)
1891 n += sprintf(&display_buf[n], " State: %s,", threadinfo.display);
1892 if (*threadinfo.more_display)
1893 n += sprintf(&display_buf[n], " Priority: %s",
1894 threadinfo.more_display);
1898 /* for purely cosmetic reasons, clear up trailing commas */
1899 if (',' == display_buf[n-1])
1900 display_buf[n-1] = ' ';
1909 /* Restart the remote side; this is an extended protocol operation. */
1912 extended_remote_restart (void)
1914 struct remote_state *rs = get_remote_state ();
1915 char *buf = alloca (rs->remote_packet_size);
1917 /* Send the restart command; for reasons I don't understand the
1918 remote side really expects a number after the "R". */
1920 sprintf (&buf[1], "%x", 0);
1923 /* Now query for status so this looks just like we restarted
1924 gdbserver from scratch. */
1926 getpkt (buf, (rs->remote_packet_size), 0);
1929 /* Clean up connection to a remote debugger. */
1932 remote_close (int quitting)
1935 serial_close (remote_desc);
1939 /* Query the remote side for the text, data and bss offsets. */
1944 struct remote_state *rs = get_remote_state ();
1945 char *buf = alloca (rs->remote_packet_size);
1948 CORE_ADDR text_addr, data_addr, bss_addr;
1949 struct section_offsets *offs;
1951 putpkt ("qOffsets");
1953 getpkt (buf, (rs->remote_packet_size), 0);
1955 if (buf[0] == '\000')
1956 return; /* Return silently. Stub doesn't support
1960 warning ("Remote failure reply: %s", buf);
1964 /* Pick up each field in turn. This used to be done with scanf, but
1965 scanf will make trouble if CORE_ADDR size doesn't match
1966 conversion directives correctly. The following code will work
1967 with any size of CORE_ADDR. */
1968 text_addr = data_addr = bss_addr = 0;
1972 if (strncmp (ptr, "Text=", 5) == 0)
1975 /* Don't use strtol, could lose on big values. */
1976 while (*ptr && *ptr != ';')
1977 text_addr = (text_addr << 4) + fromhex (*ptr++);
1982 if (!lose && strncmp (ptr, ";Data=", 6) == 0)
1985 while (*ptr && *ptr != ';')
1986 data_addr = (data_addr << 4) + fromhex (*ptr++);
1991 if (!lose && strncmp (ptr, ";Bss=", 5) == 0)
1994 while (*ptr && *ptr != ';')
1995 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
2001 error ("Malformed response to offset query, %s", buf);
2003 if (symfile_objfile == NULL)
2006 offs = ((struct section_offsets *)
2007 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
2008 memcpy (offs, symfile_objfile->section_offsets,
2009 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
2011 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
2013 /* This is a temporary kludge to force data and bss to use the same offsets
2014 because that's what nlmconv does now. The real solution requires changes
2015 to the stub and remote.c that I don't have time to do right now. */
2017 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
2018 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
2020 objfile_relocate (symfile_objfile, offs);
2023 /* Stub for catch_errors. */
2026 remote_start_remote_dummy (struct ui_out *uiout, void *dummy)
2028 start_remote (); /* Initialize gdb process mechanisms */
2029 /* NOTE: Return something >=0. A -ve value is reserved for
2030 catch_exceptions. */
2035 remote_start_remote (struct ui_out *uiout, void *dummy)
2037 immediate_quit++; /* Allow user to interrupt it */
2039 /* Ack any packet which the remote side has already sent. */
2040 serial_write (remote_desc, "+", 1);
2042 /* Let the stub know that we want it to return the thread. */
2045 inferior_ptid = remote_current_thread (inferior_ptid);
2047 get_offsets (); /* Get text, data & bss offsets */
2049 putpkt ("?"); /* initiate a query from remote machine */
2052 /* NOTE: See comment above in remote_start_remote_dummy(). This
2053 function returns something >=0. */
2054 return remote_start_remote_dummy (uiout, dummy);
2057 /* Open a connection to a remote debugger.
2058 NAME is the filename used for communication. */
2061 remote_open (char *name, int from_tty)
2063 remote_open_1 (name, from_tty, &remote_ops, 0, 0);
2066 /* Just like remote_open, but with asynchronous support. */
2068 remote_async_open (char *name, int from_tty)
2070 remote_open_1 (name, from_tty, &remote_async_ops, 0, 1);
2073 /* Open a connection to a remote debugger using the extended
2074 remote gdb protocol. NAME is the filename used for communication. */
2077 extended_remote_open (char *name, int from_tty)
2079 remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */,
2083 /* Just like extended_remote_open, but with asynchronous support. */
2085 extended_remote_async_open (char *name, int from_tty)
2087 remote_open_1 (name, from_tty, &extended_async_remote_ops,
2088 1 /*extended_p */, 1 /* async_p */);
2091 /* Generic code for opening a connection to a remote target. */
2094 init_all_packet_configs (void)
2097 update_packet_config (&remote_protocol_e);
2098 update_packet_config (&remote_protocol_E);
2099 update_packet_config (&remote_protocol_P);
2100 update_packet_config (&remote_protocol_qSymbol);
2101 update_packet_config (&remote_protocol_vcont);
2102 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
2103 update_packet_config (&remote_protocol_Z[i]);
2104 /* Force remote_write_bytes to check whether target supports binary
2106 update_packet_config (&remote_protocol_binary_download);
2107 update_packet_config (&remote_protocol_qPart_auxv);
2108 update_packet_config (&remote_protocol_qPart_dirty);
2111 /* Symbol look-up. */
2114 remote_check_symbols (struct objfile *objfile)
2116 struct remote_state *rs = get_remote_state ();
2117 char *msg, *reply, *tmp;
2118 struct minimal_symbol *sym;
2121 if (remote_protocol_qSymbol.support == PACKET_DISABLE)
2124 msg = alloca (rs->remote_packet_size);
2125 reply = alloca (rs->remote_packet_size);
2127 /* Invite target to request symbol lookups. */
2129 putpkt ("qSymbol::");
2130 getpkt (reply, (rs->remote_packet_size), 0);
2131 packet_ok (reply, &remote_protocol_qSymbol);
2133 while (strncmp (reply, "qSymbol:", 8) == 0)
2136 end = hex2bin (tmp, msg, strlen (tmp) / 2);
2138 sym = lookup_minimal_symbol (msg, NULL, NULL);
2140 sprintf (msg, "qSymbol::%s", &reply[8]);
2142 sprintf (msg, "qSymbol:%s:%s",
2143 paddr_nz (SYMBOL_VALUE_ADDRESS (sym)),
2146 getpkt (reply, (rs->remote_packet_size), 0);
2150 static struct serial *
2151 remote_serial_open (char *name)
2153 static int udp_warning = 0;
2155 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2156 of in ser-tcp.c, because it is the remote protocol assuming that the
2157 serial connection is reliable and not the serial connection promising
2159 if (!udp_warning && strncmp (name, "udp:", 4) == 0)
2161 warning ("The remote protocol may be unreliable over UDP.");
2162 warning ("Some events may be lost, rendering further debugging "
2167 return serial_open (name);
2171 remote_open_1 (char *name, int from_tty, struct target_ops *target,
2172 int extended_p, int async_p)
2175 struct remote_state *rs = get_remote_state ();
2177 error ("To open a remote debug connection, you need to specify what\n"
2178 "serial device is attached to the remote system\n"
2179 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
2181 /* See FIXME above */
2183 wait_forever_enabled_p = 1;
2185 target_preopen (from_tty);
2187 unpush_target (target);
2189 remote_desc = remote_serial_open (name);
2191 perror_with_name (name);
2193 if (baud_rate != -1)
2195 if (serial_setbaudrate (remote_desc, baud_rate))
2197 /* The requested speed could not be set. Error out to
2198 top level after closing remote_desc. Take care to
2199 set remote_desc to NULL to avoid closing remote_desc
2201 serial_close (remote_desc);
2203 perror_with_name (name);
2207 serial_raw (remote_desc);
2209 /* If there is something sitting in the buffer we might take it as a
2210 response to a command, which would be bad. */
2211 serial_flush_input (remote_desc);
2215 puts_filtered ("Remote debugging using ");
2216 puts_filtered (name);
2217 puts_filtered ("\n");
2219 push_target (target); /* Switch to using remote target now */
2221 init_all_packet_configs ();
2223 general_thread = -2;
2224 continue_thread = -2;
2226 /* Probe for ability to use "ThreadInfo" query, as required. */
2227 use_threadinfo_query = 1;
2228 use_threadextra_query = 1;
2230 /* Without this, some commands which require an active target (such
2231 as kill) won't work. This variable serves (at least) double duty
2232 as both the pid of the target process (if it has such), and as a
2233 flag indicating that a target is active. These functions should
2234 be split out into seperate variables, especially since GDB will
2235 someday have a notion of debugging several processes. */
2237 inferior_ptid = pid_to_ptid (MAGIC_NULL_PID);
2241 /* With this target we start out by owning the terminal. */
2242 remote_async_terminal_ours_p = 1;
2244 /* FIXME: cagney/1999-09-23: During the initial connection it is
2245 assumed that the target is already ready and able to respond to
2246 requests. Unfortunately remote_start_remote() eventually calls
2247 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2248 around this. Eventually a mechanism that allows
2249 wait_for_inferior() to expect/get timeouts will be
2251 wait_forever_enabled_p = 0;
2254 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2255 /* First delete any symbols previously loaded from shared libraries. */
2256 no_shared_libraries (NULL, 0);
2259 /* Start the remote connection. If error() or QUIT, discard this
2260 target (we'd otherwise be in an inconsistent state) and then
2261 propogate the error on up the exception chain. This ensures that
2262 the caller doesn't stumble along blindly assuming that the
2263 function succeeded. The CLI doesn't have this problem but other
2264 UI's, such as MI do.
2266 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
2267 this function should return an error indication letting the
2268 caller restore the previous state. Unfortunately the command
2269 ``target remote'' is directly wired to this function making that
2270 impossible. On a positive note, the CLI side of this problem has
2271 been fixed - the function set_cmd_context() makes it possible for
2272 all the ``target ....'' commands to share a common callback
2273 function. See cli-dump.c. */
2274 ex = catch_exceptions (uiout,
2275 remote_start_remote, NULL,
2276 "Couldn't establish connection to remote"
2283 wait_forever_enabled_p = 1;
2284 throw_exception (ex);
2288 wait_forever_enabled_p = 1;
2292 /* Tell the remote that we are using the extended protocol. */
2293 char *buf = alloca (rs->remote_packet_size);
2295 getpkt (buf, (rs->remote_packet_size), 0);
2297 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2298 /* FIXME: need a master target_open vector from which all
2299 remote_opens can be called, so that stuff like this can
2300 go there. Failing that, the following code must be copied
2301 to the open function for any remote target that wants to
2302 support svr4 shared libraries. */
2304 /* Set up to detect and load shared libraries. */
2305 if (exec_bfd) /* No use without an exec file. */
2307 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid));
2308 remote_check_symbols (symfile_objfile);
2313 /* This takes a program previously attached to and detaches it. After
2314 this is done, GDB can be used to debug some other program. We
2315 better not have left any breakpoints in the target program or it'll
2316 die when it hits one. */
2319 remote_detach (char *args, int from_tty)
2321 struct remote_state *rs = get_remote_state ();
2322 char *buf = alloca (rs->remote_packet_size);
2325 error ("Argument given to \"detach\" when remotely debugging.");
2327 /* Tell the remote target to detach. */
2329 remote_send (buf, (rs->remote_packet_size));
2331 /* Unregister the file descriptor from the event loop. */
2332 if (target_is_async_p ())
2333 serial_async (remote_desc, NULL, 0);
2335 target_mourn_inferior ();
2337 puts_filtered ("Ending remote debugging.\n");
2340 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
2343 remote_disconnect (char *args, int from_tty)
2345 struct remote_state *rs = get_remote_state ();
2346 char *buf = alloca (rs->remote_packet_size);
2349 error ("Argument given to \"detach\" when remotely debugging.");
2351 /* Unregister the file descriptor from the event loop. */
2352 if (target_is_async_p ())
2353 serial_async (remote_desc, NULL, 0);
2355 target_mourn_inferior ();
2357 puts_filtered ("Ending remote debugging.\n");
2360 /* Convert hex digit A to a number. */
2365 if (a >= '0' && a <= '9')
2367 else if (a >= 'a' && a <= 'f')
2368 return a - 'a' + 10;
2369 else if (a >= 'A' && a <= 'F')
2370 return a - 'A' + 10;
2372 error ("Reply contains invalid hex digit %d", a);
2376 hex2bin (const char *hex, char *bin, int count)
2380 for (i = 0; i < count; i++)
2382 if (hex[0] == 0 || hex[1] == 0)
2384 /* Hex string is short, or of uneven length.
2385 Return the count that has been converted so far. */
2388 *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]);
2394 /* Convert number NIB to a hex digit. */
2402 return 'a' + nib - 10;
2406 bin2hex (const char *bin, char *hex, int count)
2409 /* May use a length, or a nul-terminated string as input. */
2411 count = strlen (bin);
2413 for (i = 0; i < count; i++)
2415 *hex++ = tohex ((*bin >> 4) & 0xf);
2416 *hex++ = tohex (*bin++ & 0xf);
2422 /* Check for the availability of vCont. This function should also check
2426 remote_vcont_probe (struct remote_state *rs, char *buf)
2428 strcpy (buf, "vCont?");
2430 getpkt (buf, rs->remote_packet_size, 0);
2432 /* Make sure that the features we assume are supported. */
2433 if (strncmp (buf, "vCont", 5) == 0)
2436 int support_s, support_S, support_c, support_C;
2442 while (p && *p == ';')
2445 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
2447 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
2449 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
2451 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
2454 p = strchr (p, ';');
2457 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
2458 BUF will make packet_ok disable the packet. */
2459 if (!support_s || !support_S || !support_c || !support_C)
2463 packet_ok (buf, &remote_protocol_vcont);
2466 /* Resume the remote inferior by using a "vCont" packet. The thread
2467 to be resumed is PTID; STEP and SIGGNAL indicate whether the
2468 resumed thread should be single-stepped and/or signalled. If PTID's
2469 PID is -1, then all threads are resumed; the thread to be stepped and/or
2470 signalled is given in the global INFERIOR_PTID. This function returns
2471 non-zero iff it resumes the inferior.
2473 This function issues a strict subset of all possible vCont commands at the
2477 remote_vcont_resume (ptid_t ptid, int step, enum target_signal siggnal)
2479 struct remote_state *rs = get_remote_state ();
2480 int pid = PIDGET (ptid);
2481 char *buf = NULL, *outbuf;
2482 struct cleanup *old_cleanup;
2484 buf = xmalloc (rs->remote_packet_size);
2485 old_cleanup = make_cleanup (xfree, buf);
2487 if (remote_protocol_vcont.support == PACKET_SUPPORT_UNKNOWN)
2488 remote_vcont_probe (rs, buf);
2490 if (remote_protocol_vcont.support == PACKET_DISABLE)
2492 do_cleanups (old_cleanup);
2496 /* If we could generate a wider range of packets, we'd have to worry
2497 about overflowing BUF. Should there be a generic
2498 "multi-part-packet" packet? */
2500 if (PIDGET (inferior_ptid) == MAGIC_NULL_PID)
2502 /* MAGIC_NULL_PTID means that we don't have any active threads, so we
2503 don't have any PID numbers the inferior will understand. Make sure
2504 to only send forms that do not specify a PID. */
2505 if (step && siggnal != TARGET_SIGNAL_0)
2506 outbuf = xstrprintf ("vCont;S%02x", siggnal);
2508 outbuf = xstrprintf ("vCont;s");
2509 else if (siggnal != TARGET_SIGNAL_0)
2510 outbuf = xstrprintf ("vCont;C%02x", siggnal);
2512 outbuf = xstrprintf ("vCont;c");
2516 /* Resume all threads, with preference for INFERIOR_PTID. */
2517 if (step && siggnal != TARGET_SIGNAL_0)
2518 outbuf = xstrprintf ("vCont;S%02x:%x;c", siggnal,
2519 PIDGET (inferior_ptid));
2521 outbuf = xstrprintf ("vCont;s:%x;c", PIDGET (inferior_ptid));
2522 else if (siggnal != TARGET_SIGNAL_0)
2523 outbuf = xstrprintf ("vCont;C%02x:%x;c", siggnal,
2524 PIDGET (inferior_ptid));
2526 outbuf = xstrprintf ("vCont;c");
2530 /* Scheduler locking; resume only PTID. */
2531 if (step && siggnal != TARGET_SIGNAL_0)
2532 outbuf = xstrprintf ("vCont;S%02x:%x", siggnal, pid);
2534 outbuf = xstrprintf ("vCont;s:%x", pid);
2535 else if (siggnal != TARGET_SIGNAL_0)
2536 outbuf = xstrprintf ("vCont;C%02x:%x", siggnal, pid);
2538 outbuf = xstrprintf ("vCont;c:%x", pid);
2541 gdb_assert (outbuf && strlen (outbuf) < rs->remote_packet_size);
2542 make_cleanup (xfree, outbuf);
2546 do_cleanups (old_cleanup);
2551 /* Tell the remote machine to resume. */
2553 static enum target_signal last_sent_signal = TARGET_SIGNAL_0;
2555 static int last_sent_step;
2558 remote_resume (ptid_t ptid, int step, enum target_signal siggnal)
2560 struct remote_state *rs = get_remote_state ();
2561 char *buf = alloca (rs->remote_packet_size);
2562 int pid = PIDGET (ptid);
2565 last_sent_signal = siggnal;
2566 last_sent_step = step;
2568 /* A hook for when we need to do something at the last moment before
2570 if (target_resume_hook)
2571 (*target_resume_hook) ();
2573 /* The vCont packet doesn't need to specify threads via Hc. */
2574 if (remote_vcont_resume (ptid, step, siggnal))
2577 /* All other supported resume packets do use Hc, so call set_thread. */
2579 set_thread (0, 0); /* run any thread */
2581 set_thread (pid, 0); /* run this thread */
2583 /* The s/S/c/C packets do not return status. So if the target does
2584 not support the S or C packets, the debug agent returns an empty
2585 string which is detected in remote_wait(). This protocol defect
2586 is fixed in the e/E packets. */
2588 if (step && step_range_end)
2590 /* If the target does not support the 'E' packet, we try the 'S'
2591 packet. Ideally we would fall back to the 'e' packet if that
2592 too is not supported. But that would require another copy of
2593 the code to issue the 'e' packet (and fall back to 's' if not
2594 supported) in remote_wait(). */
2596 if (siggnal != TARGET_SIGNAL_0)
2598 if (remote_protocol_E.support != PACKET_DISABLE)
2602 *p++ = tohex (((int) siggnal >> 4) & 0xf);
2603 *p++ = tohex (((int) siggnal) & 0xf);
2605 p += hexnumstr (p, (ULONGEST) step_range_start);
2607 p += hexnumstr (p, (ULONGEST) step_range_end);
2611 getpkt (buf, (rs->remote_packet_size), 0);
2613 if (packet_ok (buf, &remote_protocol_E) == PACKET_OK)
2619 if (remote_protocol_e.support != PACKET_DISABLE)
2623 p += hexnumstr (p, (ULONGEST) step_range_start);
2625 p += hexnumstr (p, (ULONGEST) step_range_end);
2629 getpkt (buf, (rs->remote_packet_size), 0);
2631 if (packet_ok (buf, &remote_protocol_e) == PACKET_OK)
2637 if (siggnal != TARGET_SIGNAL_0)
2639 buf[0] = step ? 'S' : 'C';
2640 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
2641 buf[2] = tohex (((int) siggnal) & 0xf);
2645 strcpy (buf, step ? "s" : "c");
2650 /* Same as remote_resume, but with async support. */
2652 remote_async_resume (ptid_t ptid, int step, enum target_signal siggnal)
2654 remote_resume (ptid, step, siggnal);
2656 /* We are about to start executing the inferior, let's register it
2657 with the event loop. NOTE: this is the one place where all the
2658 execution commands end up. We could alternatively do this in each
2659 of the execution commands in infcmd.c.*/
2660 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
2661 into infcmd.c in order to allow inferior function calls to work
2662 NOT asynchronously. */
2663 if (event_loop_p && target_can_async_p ())
2664 target_async (inferior_event_handler, 0);
2665 /* Tell the world that the target is now executing. */
2666 /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set
2667 this? Instead, should the client of target just assume (for
2668 async targets) that the target is going to start executing? Is
2669 this information already found in the continuation block? */
2670 if (target_is_async_p ())
2671 target_executing = 1;
2675 /* Set up the signal handler for SIGINT, while the target is
2676 executing, ovewriting the 'regular' SIGINT signal handler. */
2678 initialize_sigint_signal_handler (void)
2680 sigint_remote_token =
2681 create_async_signal_handler (async_remote_interrupt, NULL);
2682 signal (SIGINT, handle_remote_sigint);
2685 /* Signal handler for SIGINT, while the target is executing. */
2687 handle_remote_sigint (int sig)
2689 signal (sig, handle_remote_sigint_twice);
2690 sigint_remote_twice_token =
2691 create_async_signal_handler (async_remote_interrupt_twice, NULL);
2692 mark_async_signal_handler_wrapper (sigint_remote_token);
2695 /* Signal handler for SIGINT, installed after SIGINT has already been
2696 sent once. It will take effect the second time that the user sends
2699 handle_remote_sigint_twice (int sig)
2701 signal (sig, handle_sigint);
2702 sigint_remote_twice_token =
2703 create_async_signal_handler (inferior_event_handler_wrapper, NULL);
2704 mark_async_signal_handler_wrapper (sigint_remote_twice_token);
2707 /* Perform the real interruption of the target execution, in response
2710 async_remote_interrupt (gdb_client_data arg)
2713 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
2718 /* Perform interrupt, if the first attempt did not succeed. Just give
2719 up on the target alltogether. */
2721 async_remote_interrupt_twice (gdb_client_data arg)
2724 fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n");
2725 /* Do something only if the target was not killed by the previous
2727 if (target_executing)
2730 signal (SIGINT, handle_remote_sigint);
2734 /* Reinstall the usual SIGINT handlers, after the target has
2737 cleanup_sigint_signal_handler (void *dummy)
2739 signal (SIGINT, handle_sigint);
2740 if (sigint_remote_twice_token)
2741 delete_async_signal_handler ((struct async_signal_handler **) & sigint_remote_twice_token);
2742 if (sigint_remote_token)
2743 delete_async_signal_handler ((struct async_signal_handler **) & sigint_remote_token);
2746 /* Send ^C to target to halt it. Target will respond, and send us a
2748 static void (*ofunc) (int);
2750 /* The command line interface's stop routine. This function is installed
2751 as a signal handler for SIGINT. The first time a user requests a
2752 stop, we call remote_stop to send a break or ^C. If there is no
2753 response from the target (it didn't stop when the user requested it),
2754 we ask the user if he'd like to detach from the target. */
2756 remote_interrupt (int signo)
2758 /* If this doesn't work, try more severe steps. */
2759 signal (signo, remote_interrupt_twice);
2762 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
2767 /* The user typed ^C twice. */
2770 remote_interrupt_twice (int signo)
2772 signal (signo, ofunc);
2774 signal (signo, remote_interrupt);
2777 /* This is the generic stop called via the target vector. When a target
2778 interrupt is requested, either by the command line or the GUI, we
2779 will eventually end up here. */
2783 /* Send a break or a ^C, depending on user preference. */
2785 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
2788 serial_send_break (remote_desc);
2790 serial_write (remote_desc, "\003", 1);
2793 /* Ask the user what to do when an interrupt is received. */
2796 interrupt_query (void)
2798 target_terminal_ours ();
2800 if (query ("Interrupted while waiting for the program.\n\
2801 Give up (and stop debugging it)? "))
2803 target_mourn_inferior ();
2804 throw_exception (RETURN_QUIT);
2807 target_terminal_inferior ();
2810 /* Enable/disable target terminal ownership. Most targets can use
2811 terminal groups to control terminal ownership. Remote targets are
2812 different in that explicit transfer of ownership to/from GDB/target
2816 remote_async_terminal_inferior (void)
2818 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
2819 sync_execution here. This function should only be called when
2820 GDB is resuming the inferior in the forground. A background
2821 resume (``run&'') should leave GDB in control of the terminal and
2822 consequently should not call this code. */
2823 if (!sync_execution)
2825 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
2826 calls target_terminal_*() idenpotent. The event-loop GDB talking
2827 to an asynchronous target with a synchronous command calls this
2828 function from both event-top.c and infrun.c/infcmd.c. Once GDB
2829 stops trying to transfer the terminal to the target when it
2830 shouldn't this guard can go away. */
2831 if (!remote_async_terminal_ours_p)
2833 delete_file_handler (input_fd);
2834 remote_async_terminal_ours_p = 0;
2835 initialize_sigint_signal_handler ();
2836 /* NOTE: At this point we could also register our selves as the
2837 recipient of all input. Any characters typed could then be
2838 passed on down to the target. */
2842 remote_async_terminal_ours (void)
2844 /* See FIXME in remote_async_terminal_inferior. */
2845 if (!sync_execution)
2847 /* See FIXME in remote_async_terminal_inferior. */
2848 if (remote_async_terminal_ours_p)
2850 cleanup_sigint_signal_handler (NULL);
2851 add_file_handler (input_fd, stdin_event_handler, 0);
2852 remote_async_terminal_ours_p = 1;
2855 /* If nonzero, ignore the next kill. */
2860 remote_console_output (char *msg)
2864 for (p = msg; p[0] && p[1]; p += 2)
2867 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
2870 fputs_unfiltered (tb, gdb_stdtarg);
2872 gdb_flush (gdb_stdtarg);
2875 /* Wait until the remote machine stops, then return,
2876 storing status in STATUS just as `wait' would.
2877 Returns "pid", which in the case of a multi-threaded
2878 remote OS, is the thread-id. */
2881 remote_wait (ptid_t ptid, struct target_waitstatus *status)
2883 struct remote_state *rs = get_remote_state ();
2884 unsigned char *buf = alloca (rs->remote_packet_size);
2885 ULONGEST thread_num = -1;
2888 status->kind = TARGET_WAITKIND_EXITED;
2889 status->value.integer = 0;
2895 ofunc = signal (SIGINT, remote_interrupt);
2896 getpkt (buf, (rs->remote_packet_size), 1);
2897 signal (SIGINT, ofunc);
2899 /* This is a hook for when we need to do something (perhaps the
2900 collection of trace data) every time the target stops. */
2901 if (target_wait_loop_hook)
2902 (*target_wait_loop_hook) ();
2904 remote_stopped_by_watchpoint_p = 0;
2908 case 'E': /* Error of some sort */
2909 warning ("Remote failure reply: %s", buf);
2911 case 'F': /* File-I/O request */
2912 remote_fileio_request (buf);
2914 case 'T': /* Status with PC, SP, FP, ... */
2917 char regs[MAX_REGISTER_SIZE];
2919 /* Expedited reply, containing Signal, {regno, reg} repeat */
2920 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
2922 n... = register number
2923 r... = register contents
2925 p = &buf[3]; /* after Txx */
2934 /* If the packet contains a register number save it in pnum
2935 and set p1 to point to the character following it.
2936 Otherwise p1 points to p. */
2938 /* If this packet is an awatch packet, don't parse the 'a'
2939 as a register number. */
2941 if (strncmp (p, "awatch", strlen("awatch")) != 0)
2943 /* Read the ``P'' register number. */
2944 pnum = strtol (p, &p_temp, 16);
2945 p1 = (unsigned char *) p_temp;
2950 if (p1 == p) /* No register number present here */
2952 p1 = (unsigned char *) strchr (p, ':');
2954 warning ("Malformed packet(a) (missing colon): %s\n\
2957 if (strncmp (p, "thread", p1 - p) == 0)
2959 p_temp = unpack_varlen_hex (++p1, &thread_num);
2960 record_currthread (thread_num);
2961 p = (unsigned char *) p_temp;
2963 else if ((strncmp (p, "watch", p1 - p) == 0)
2964 || (strncmp (p, "rwatch", p1 - p) == 0)
2965 || (strncmp (p, "awatch", p1 - p) == 0))
2967 remote_stopped_by_watchpoint_p = 1;
2968 p = unpack_varlen_hex (++p1, &addr);
2969 remote_watch_data_address = (CORE_ADDR)addr;
2973 /* Silently skip unknown optional info. */
2974 p_temp = strchr (p1 + 1, ';');
2976 p = (unsigned char *) p_temp;
2981 struct packet_reg *reg = packet_reg_from_pnum (rs, pnum);
2985 error ("Malformed packet(b) (missing colon): %s\nPacket: '%s'\n",
2989 error ("Remote sent bad register number %s: %s\nPacket: '%s'\n",
2990 phex_nz (pnum, 0), p, buf);
2992 fieldsize = hex2bin (p, regs, DEPRECATED_REGISTER_RAW_SIZE (reg->regnum));
2994 if (fieldsize < DEPRECATED_REGISTER_RAW_SIZE (reg->regnum))
2995 warning ("Remote reply is too short: %s", buf);
2996 supply_register (reg->regnum, regs);
3000 error ("Remote register badly formatted: %s\nhere: %s", buf, p);
3004 case 'S': /* Old style status, just signal only */
3005 status->kind = TARGET_WAITKIND_STOPPED;
3006 status->value.sig = (enum target_signal)
3007 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3011 thread_num = strtol ((const char *) &buf[4], NULL, 16);
3012 record_currthread (thread_num);
3015 case 'W': /* Target exited */
3017 /* The remote process exited. */
3018 status->kind = TARGET_WAITKIND_EXITED;
3019 status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
3023 status->kind = TARGET_WAITKIND_SIGNALLED;
3024 status->value.sig = (enum target_signal)
3025 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3029 case 'O': /* Console output */
3030 remote_console_output (buf + 1);
3033 if (last_sent_signal != TARGET_SIGNAL_0)
3035 /* Zero length reply means that we tried 'S' or 'C' and
3036 the remote system doesn't support it. */
3037 target_terminal_ours_for_output ();
3039 ("Can't send signals to this remote system. %s not sent.\n",
3040 target_signal_to_name (last_sent_signal));
3041 last_sent_signal = TARGET_SIGNAL_0;
3042 target_terminal_inferior ();
3044 strcpy ((char *) buf, last_sent_step ? "s" : "c");
3045 putpkt ((char *) buf);
3048 /* else fallthrough */
3050 warning ("Invalid remote reply: %s", buf);
3055 if (thread_num != -1)
3057 return pid_to_ptid (thread_num);
3059 return inferior_ptid;
3062 /* Async version of remote_wait. */
3064 remote_async_wait (ptid_t ptid, struct target_waitstatus *status)
3066 struct remote_state *rs = get_remote_state ();
3067 unsigned char *buf = alloca (rs->remote_packet_size);
3068 ULONGEST thread_num = -1;
3071 status->kind = TARGET_WAITKIND_EXITED;
3072 status->value.integer = 0;
3074 remote_stopped_by_watchpoint_p = 0;
3080 if (!target_is_async_p ())
3081 ofunc = signal (SIGINT, remote_interrupt);
3082 /* FIXME: cagney/1999-09-27: If we're in async mode we should
3083 _never_ wait for ever -> test on target_is_async_p().
3084 However, before we do that we need to ensure that the caller
3085 knows how to take the target into/out of async mode. */
3086 getpkt (buf, (rs->remote_packet_size), wait_forever_enabled_p);
3087 if (!target_is_async_p ())
3088 signal (SIGINT, ofunc);
3090 /* This is a hook for when we need to do something (perhaps the
3091 collection of trace data) every time the target stops. */
3092 if (target_wait_loop_hook)
3093 (*target_wait_loop_hook) ();
3097 case 'E': /* Error of some sort */
3098 warning ("Remote failure reply: %s", buf);
3100 case 'F': /* File-I/O request */
3101 remote_fileio_request (buf);
3103 case 'T': /* Status with PC, SP, FP, ... */
3106 char regs[MAX_REGISTER_SIZE];
3108 /* Expedited reply, containing Signal, {regno, reg} repeat */
3109 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3111 n... = register number
3112 r... = register contents
3114 p = &buf[3]; /* after Txx */
3123 /* If the packet contains a register number, save it in pnum
3124 and set p1 to point to the character following it.
3125 Otherwise p1 points to p. */
3127 /* If this packet is an awatch packet, don't parse the 'a'
3128 as a register number. */
3130 if (!strncmp (p, "awatch", strlen ("awatch")) != 0)
3132 /* Read the register number. */
3133 pnum = strtol (p, &p_temp, 16);
3134 p1 = (unsigned char *) p_temp;
3139 if (p1 == p) /* No register number present here */
3141 p1 = (unsigned char *) strchr (p, ':');
3143 error ("Malformed packet(a) (missing colon): %s\nPacket: '%s'\n",
3145 if (strncmp (p, "thread", p1 - p) == 0)
3147 p_temp = unpack_varlen_hex (++p1, &thread_num);
3148 record_currthread (thread_num);
3149 p = (unsigned char *) p_temp;
3151 else if ((strncmp (p, "watch", p1 - p) == 0)
3152 || (strncmp (p, "rwatch", p1 - p) == 0)
3153 || (strncmp (p, "awatch", p1 - p) == 0))
3155 remote_stopped_by_watchpoint_p = 1;
3156 p = unpack_varlen_hex (++p1, &addr);
3157 remote_watch_data_address = (CORE_ADDR)addr;
3161 /* Silently skip unknown optional info. */
3162 p_temp = (unsigned char *) strchr (p1 + 1, ';');
3170 struct packet_reg *reg = packet_reg_from_pnum (rs, pnum);
3173 error ("Malformed packet(b) (missing colon): %s\nPacket: '%s'\n",
3177 error ("Remote sent bad register number %ld: %s\nPacket: '%s'\n",
3180 fieldsize = hex2bin (p, regs, DEPRECATED_REGISTER_RAW_SIZE (reg->regnum));
3182 if (fieldsize < DEPRECATED_REGISTER_RAW_SIZE (reg->regnum))
3183 warning ("Remote reply is too short: %s", buf);
3184 supply_register (reg->regnum, regs);
3188 error ("Remote register badly formatted: %s\nhere: %s",
3193 case 'S': /* Old style status, just signal only */
3194 status->kind = TARGET_WAITKIND_STOPPED;
3195 status->value.sig = (enum target_signal)
3196 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3200 thread_num = strtol ((const char *) &buf[4], NULL, 16);
3201 record_currthread (thread_num);
3204 case 'W': /* Target exited */
3206 /* The remote process exited. */
3207 status->kind = TARGET_WAITKIND_EXITED;
3208 status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
3212 status->kind = TARGET_WAITKIND_SIGNALLED;
3213 status->value.sig = (enum target_signal)
3214 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3218 case 'O': /* Console output */
3219 remote_console_output (buf + 1);
3220 /* Return immediately to the event loop. The event loop will
3221 still be waiting on the inferior afterwards. */
3222 status->kind = TARGET_WAITKIND_IGNORE;
3225 if (last_sent_signal != TARGET_SIGNAL_0)
3227 /* Zero length reply means that we tried 'S' or 'C' and
3228 the remote system doesn't support it. */
3229 target_terminal_ours_for_output ();
3231 ("Can't send signals to this remote system. %s not sent.\n",
3232 target_signal_to_name (last_sent_signal));
3233 last_sent_signal = TARGET_SIGNAL_0;
3234 target_terminal_inferior ();
3236 strcpy ((char *) buf, last_sent_step ? "s" : "c");
3237 putpkt ((char *) buf);
3240 /* else fallthrough */
3242 warning ("Invalid remote reply: %s", buf);
3247 if (thread_num != -1)
3249 return pid_to_ptid (thread_num);
3251 return inferior_ptid;
3254 /* Number of bytes of registers this stub implements. */
3256 static int register_bytes_found;
3258 /* Read the remote registers into the block REGS. */
3259 /* Currently we just read all the registers, so we don't use regnum. */
3262 remote_fetch_registers (int regnum)
3264 struct remote_state *rs = get_remote_state ();
3265 char *buf = alloca (rs->remote_packet_size);
3268 char *regs = alloca (rs->sizeof_g_packet);
3270 set_thread (PIDGET (inferior_ptid), 1);
3274 struct packet_reg *reg = packet_reg_from_regnum (rs, regnum);
3275 gdb_assert (reg != NULL);
3276 if (!reg->in_g_packet)
3277 internal_error (__FILE__, __LINE__,
3278 "Attempt to fetch a non G-packet register when this "
3279 "remote.c does not support the p-packet.");
3283 remote_send (buf, (rs->remote_packet_size));
3285 /* Save the size of the packet sent to us by the target. Its used
3286 as a heuristic when determining the max size of packets that the
3287 target can safely receive. */
3288 if ((rs->actual_register_packet_size) == 0)
3289 (rs->actual_register_packet_size) = strlen (buf);
3291 /* Unimplemented registers read as all bits zero. */
3292 memset (regs, 0, rs->sizeof_g_packet);
3294 /* We can get out of synch in various cases. If the first character
3295 in the buffer is not a hex character, assume that has happened
3296 and try to fetch another packet to read. */
3297 while ((buf[0] < '0' || buf[0] > '9')
3298 && (buf[0] < 'a' || buf[0] > 'f')
3299 && buf[0] != 'x') /* New: unavailable register value */
3302 fprintf_unfiltered (gdb_stdlog,
3303 "Bad register packet; fetching a new packet\n");
3304 getpkt (buf, (rs->remote_packet_size), 0);
3307 /* Reply describes registers byte by byte, each byte encoded as two
3308 hex characters. Suck them all up, then supply them to the
3309 register cacheing/storage mechanism. */
3312 for (i = 0; i < rs->sizeof_g_packet; i++)
3318 warning ("Remote reply is of odd length: %s", buf);
3319 /* Don't change register_bytes_found in this case, and don't
3320 print a second warning. */
3323 if (p[0] == 'x' && p[1] == 'x')
3324 regs[i] = 0; /* 'x' */
3326 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
3330 if (i != register_bytes_found)
3332 register_bytes_found = i;
3333 if (REGISTER_BYTES_OK_P ()
3334 && !REGISTER_BYTES_OK (i))
3335 warning ("Remote reply is too short: %s", buf);
3341 for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++)
3343 struct packet_reg *r = &rs->regs[i];
3346 if (r->offset * 2 >= strlen (buf))
3347 /* A short packet that didn't include the register's
3348 value, this implies that the register is zero (and
3349 not that the register is unavailable). Supply that
3351 regcache_raw_supply (current_regcache, r->regnum, NULL);
3352 else if (buf[r->offset * 2] == 'x')
3354 gdb_assert (r->offset * 2 < strlen (buf));
3355 /* The register isn't available, mark it as such (at
3356 the same time setting the value to zero). */
3357 regcache_raw_supply (current_regcache, r->regnum, NULL);
3358 set_register_cached (i, -1);
3361 regcache_raw_supply (current_regcache, r->regnum,
3368 /* Prepare to store registers. Since we may send them all (using a
3369 'G' request), we have to read out the ones we don't want to change
3373 remote_prepare_to_store (void)
3375 struct remote_state *rs = get_remote_state ();
3377 char buf[MAX_REGISTER_SIZE];
3379 /* Make sure the entire registers array is valid. */
3380 switch (remote_protocol_P.support)
3382 case PACKET_DISABLE:
3383 case PACKET_SUPPORT_UNKNOWN:
3384 /* Make sure all the necessary registers are cached. */
3385 for (i = 0; i < NUM_REGS; i++)
3386 if (rs->regs[i].in_g_packet)
3387 regcache_raw_read (current_regcache, rs->regs[i].regnum, buf);
3394 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
3395 packet was not recognized. */
3398 store_register_using_P (int regnum)
3400 struct remote_state *rs = get_remote_state ();
3401 struct packet_reg *reg = packet_reg_from_regnum (rs, regnum);
3402 /* Try storing a single register. */
3403 char *buf = alloca (rs->remote_packet_size);
3404 char regp[MAX_REGISTER_SIZE];
3408 sprintf (buf, "P%s=", phex_nz (reg->pnum, 0));
3409 p = buf + strlen (buf);
3410 regcache_collect (reg->regnum, regp);
3411 bin2hex (regp, p, DEPRECATED_REGISTER_RAW_SIZE (reg->regnum));
3412 remote_send (buf, rs->remote_packet_size);
3414 return buf[0] != '\0';
3418 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
3419 of the register cache buffer. FIXME: ignores errors. */
3422 remote_store_registers (int regnum)
3424 struct remote_state *rs = get_remote_state ();
3430 set_thread (PIDGET (inferior_ptid), 1);
3434 switch (remote_protocol_P.support)
3436 case PACKET_DISABLE:
3439 if (store_register_using_P (regnum))
3442 error ("Protocol error: P packet not recognized by stub");
3443 case PACKET_SUPPORT_UNKNOWN:
3444 if (store_register_using_P (regnum))
3446 /* The stub recognized the 'P' packet. Remember this. */
3447 remote_protocol_P.support = PACKET_ENABLE;
3452 /* The stub does not support the 'P' packet. Use 'G'
3453 instead, and don't try using 'P' in the future (it
3454 will just waste our time). */
3455 remote_protocol_P.support = PACKET_DISABLE;
3461 /* Extract all the registers in the regcache copying them into a
3465 regs = alloca (rs->sizeof_g_packet);
3466 memset (regs, rs->sizeof_g_packet, 0);
3467 for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++)
3469 struct packet_reg *r = &rs->regs[i];
3471 regcache_collect (r->regnum, regs + r->offset);
3475 /* Command describes registers byte by byte,
3476 each byte encoded as two hex characters. */
3477 buf = alloca (rs->remote_packet_size);
3480 /* remote_prepare_to_store insures that register_bytes_found gets set. */
3481 bin2hex (regs, p, register_bytes_found);
3482 remote_send (buf, (rs->remote_packet_size));
3486 /* Return the number of hex digits in num. */
3489 hexnumlen (ULONGEST num)
3493 for (i = 0; num != 0; i++)
3499 /* Set BUF to the minimum number of hex digits representing NUM. */
3502 hexnumstr (char *buf, ULONGEST num)
3504 int len = hexnumlen (num);
3505 return hexnumnstr (buf, num, len);
3509 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
3512 hexnumnstr (char *buf, ULONGEST num, int width)
3518 for (i = width - 1; i >= 0; i--)
3520 buf[i] = "0123456789abcdef"[(num & 0xf)];
3527 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
3530 remote_address_masked (CORE_ADDR addr)
3532 if (remote_address_size > 0
3533 && remote_address_size < (sizeof (ULONGEST) * 8))
3535 /* Only create a mask when that mask can safely be constructed
3536 in a ULONGEST variable. */
3538 mask = (mask << remote_address_size) - 1;
3544 /* Determine whether the remote target supports binary downloading.
3545 This is accomplished by sending a no-op memory write of zero length
3546 to the target at the specified address. It does not suffice to send
3547 the whole packet, since many stubs strip the eighth bit and subsequently
3548 compute a wrong checksum, which causes real havoc with remote_write_bytes.
3550 NOTE: This can still lose if the serial line is not eight-bit
3551 clean. In cases like this, the user should clear "remote
3555 check_binary_download (CORE_ADDR addr)
3557 struct remote_state *rs = get_remote_state ();
3558 switch (remote_protocol_binary_download.support)
3560 case PACKET_DISABLE:
3564 case PACKET_SUPPORT_UNKNOWN:
3566 char *buf = alloca (rs->remote_packet_size);
3571 p += hexnumstr (p, (ULONGEST) addr);
3573 p += hexnumstr (p, (ULONGEST) 0);
3577 putpkt_binary (buf, (int) (p - buf));
3578 getpkt (buf, (rs->remote_packet_size), 0);
3583 fprintf_unfiltered (gdb_stdlog,
3584 "binary downloading NOT suppported by target\n");
3585 remote_protocol_binary_download.support = PACKET_DISABLE;
3590 fprintf_unfiltered (gdb_stdlog,
3591 "binary downloading suppported by target\n");
3592 remote_protocol_binary_download.support = PACKET_ENABLE;
3599 /* Write memory data directly to the remote machine.
3600 This does not inform the data cache; the data cache uses this.
3601 MEMADDR is the address in the remote memory space.
3602 MYADDR is the address of the buffer in our space.
3603 LEN is the number of bytes.
3605 Returns number of bytes transferred, or 0 (setting errno) for
3606 error. Only transfer a single packet. */
3609 remote_write_bytes (CORE_ADDR memaddr, char *myaddr, int len)
3613 unsigned char *plen;
3619 unsigned char *payload_start;
3621 /* Verify that the target can support a binary download. */
3622 check_binary_download (memaddr);
3624 /* Compute the size, and then allocate space for the largest
3625 possible packet. Include space for an extra trailing NUL. */
3626 sizeof_buf = get_memory_write_packet_size () + 1;
3627 buf = alloca (sizeof_buf);
3629 /* Compute the size of the actual payload by subtracting out the
3630 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
3631 payload_size = (get_memory_write_packet_size () - (strlen ("$M,:#NN")
3632 + hexnumlen (memaddr)
3633 + hexnumlen (len)));
3635 /* Construct the packet header: "[MX]<memaddr>,<len>:". */
3637 /* Append "[XM]". Compute a best guess of the number of bytes
3638 actually transfered. */
3640 switch (remote_protocol_binary_download.support)
3644 /* Best guess at number of bytes that will fit. */
3645 todo = min (len, payload_size);
3647 case PACKET_DISABLE:
3649 /* num bytes that will fit */
3650 todo = min (len, payload_size / 2);
3652 case PACKET_SUPPORT_UNKNOWN:
3653 internal_error (__FILE__, __LINE__,
3654 "remote_write_bytes: bad internal state");
3656 internal_error (__FILE__, __LINE__, "bad switch");
3659 /* Append "<memaddr>". */
3660 memaddr = remote_address_masked (memaddr);
3661 p += hexnumstr (p, (ULONGEST) memaddr);
3666 /* Append <len>. Retain the location/size of <len>. It may need to
3667 be adjusted once the packet body has been created. */
3669 plenlen = hexnumstr (p, (ULONGEST) todo);
3676 /* Append the packet body. */
3678 switch (remote_protocol_binary_download.support)
3681 /* Binary mode. Send target system values byte by byte, in
3682 increasing byte addresses. Only escape certain critical
3685 (nr_bytes < todo) && (p - payload_start) < payload_size;
3688 switch (myaddr[nr_bytes] & 0xff)
3693 /* These must be escaped */
3695 *p++ = (myaddr[nr_bytes] & 0xff) ^ 0x20;
3698 *p++ = myaddr[nr_bytes] & 0xff;
3702 if (nr_bytes < todo)
3704 /* Escape chars have filled up the buffer prematurely,
3705 and we have actually sent fewer bytes than planned.
3706 Fix-up the length field of the packet. Use the same
3707 number of characters as before. */
3708 plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen);
3709 *plen = ':'; /* overwrite \0 from hexnumnstr() */
3712 case PACKET_DISABLE:
3713 /* Normal mode: Send target system values byte by byte, in
3714 increasing byte addresses. Each byte is encoded as a two hex
3716 nr_bytes = bin2hex (myaddr, p, todo);
3719 case PACKET_SUPPORT_UNKNOWN:
3720 internal_error (__FILE__, __LINE__,
3721 "remote_write_bytes: bad internal state");
3723 internal_error (__FILE__, __LINE__, "bad switch");
3726 putpkt_binary (buf, (int) (p - buf));
3727 getpkt (buf, sizeof_buf, 0);
3731 /* There is no correspondance between what the remote protocol
3732 uses for errors and errno codes. We would like a cleaner way
3733 of representing errors (big enough to include errno codes,
3734 bfd_error codes, and others). But for now just return EIO. */
3739 /* Return NR_BYTES, not TODO, in case escape chars caused us to send fewer
3740 bytes than we'd planned. */
3744 /* Read memory data directly from the remote machine.
3745 This does not use the data cache; the data cache uses this.
3746 MEMADDR is the address in the remote memory space.
3747 MYADDR is the address of the buffer in our space.
3748 LEN is the number of bytes.
3750 Returns number of bytes transferred, or 0 for error. */
3752 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
3753 remote targets) shouldn't attempt to read the entire buffer.
3754 Instead it should read a single packet worth of data and then
3755 return the byte size of that packet to the caller. The caller (its
3756 caller and its callers caller ;-) already contains code for
3757 handling partial reads. */
3760 remote_read_bytes (CORE_ADDR memaddr, char *myaddr, int len)
3763 int max_buf_size; /* Max size of packet output buffer */
3767 /* Create a buffer big enough for this packet. */
3768 max_buf_size = get_memory_read_packet_size ();
3769 sizeof_buf = max_buf_size + 1; /* Space for trailing NUL */
3770 buf = alloca (sizeof_buf);
3779 todo = min (len, max_buf_size / 2); /* num bytes that will fit */
3781 /* construct "m"<memaddr>","<len>" */
3782 /* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */
3783 memaddr = remote_address_masked (memaddr);
3786 p += hexnumstr (p, (ULONGEST) memaddr);
3788 p += hexnumstr (p, (ULONGEST) todo);
3792 getpkt (buf, sizeof_buf, 0);
3795 && isxdigit (buf[1]) && isxdigit (buf[2])
3798 /* There is no correspondance between what the remote protocol uses
3799 for errors and errno codes. We would like a cleaner way of
3800 representing errors (big enough to include errno codes, bfd_error
3801 codes, and others). But for now just return EIO. */
3806 /* Reply describes memory byte by byte,
3807 each byte encoded as two hex characters. */
3810 if ((i = hex2bin (p, myaddr, todo)) < todo)
3812 /* Reply is short. This means that we were able to read
3813 only part of what we wanted to. */
3814 return i + (origlen - len);
3823 /* Read or write LEN bytes from inferior memory at MEMADDR,
3824 transferring to or from debugger address BUFFER. Write to inferior if
3825 SHOULD_WRITE is nonzero. Returns length of data written or read; 0
3826 for error. TARGET is unused. */
3829 remote_xfer_memory (CORE_ADDR mem_addr, char *buffer, int mem_len,
3830 int should_write, struct mem_attrib *attrib,
3831 struct target_ops *target)
3833 CORE_ADDR targ_addr;
3837 /* Should this be the selected frame? */
3838 gdbarch_remote_translate_xfer_address (current_gdbarch, current_regcache,
3840 &targ_addr, &targ_len);
3845 res = remote_write_bytes (targ_addr, buffer, targ_len);
3847 res = remote_read_bytes (targ_addr, buffer, targ_len);
3853 remote_files_info (struct target_ops *ignore)
3855 puts_filtered ("Debugging a target over a serial line.\n");
3858 /* Stuff for dealing with the packets which are part of this protocol.
3859 See comment at top of file for details. */
3861 /* Read a single character from the remote end, masking it down to 7 bits. */
3864 readchar (int timeout)
3868 ch = serial_readchar (remote_desc, timeout);
3873 switch ((enum serial_rc) ch)
3876 target_mourn_inferior ();
3877 error ("Remote connection closed");
3880 perror_with_name ("Remote communication error");
3882 case SERIAL_TIMEOUT:
3888 /* Send the command in BUF to the remote machine, and read the reply
3889 into BUF. Report an error if we get an error reply. */
3892 remote_send (char *buf,
3896 getpkt (buf, sizeof_buf, 0);
3899 error ("Remote failure reply: %s", buf);
3902 /* Display a null-terminated packet on stdout, for debugging, using C
3906 print_packet (char *buf)
3908 puts_filtered ("\"");
3909 fputstr_filtered (buf, '"', gdb_stdout);
3910 puts_filtered ("\"");
3916 return putpkt_binary (buf, strlen (buf));
3919 /* Send a packet to the remote machine, with error checking. The data
3920 of the packet is in BUF. The string in BUF can be at most (rs->remote_packet_size) - 5
3921 to account for the $, # and checksum, and for a possible /0 if we are
3922 debugging (remote_debug) and want to print the sent packet as a string */
3925 putpkt_binary (char *buf, int cnt)
3927 struct remote_state *rs = get_remote_state ();
3929 unsigned char csum = 0;
3930 char *buf2 = alloca (cnt + 6);
3931 long sizeof_junkbuf = (rs->remote_packet_size);
3932 char *junkbuf = alloca (sizeof_junkbuf);
3938 /* Copy the packet into buffer BUF2, encapsulating it
3939 and giving it a checksum. */
3944 for (i = 0; i < cnt; i++)
3950 *p++ = tohex ((csum >> 4) & 0xf);
3951 *p++ = tohex (csum & 0xf);
3953 /* Send it over and over until we get a positive ack. */
3957 int started_error_output = 0;
3962 fprintf_unfiltered (gdb_stdlog, "Sending packet: ");
3963 fputstrn_unfiltered (buf2, p - buf2, 0, gdb_stdlog);
3964 fprintf_unfiltered (gdb_stdlog, "...");
3965 gdb_flush (gdb_stdlog);
3967 if (serial_write (remote_desc, buf2, p - buf2))
3968 perror_with_name ("putpkt: write failed");
3970 /* read until either a timeout occurs (-2) or '+' is read */
3973 ch = readchar (remote_timeout);
3981 case SERIAL_TIMEOUT:
3983 if (started_error_output)
3985 putchar_unfiltered ('\n');
3986 started_error_output = 0;
3995 fprintf_unfiltered (gdb_stdlog, "Ack\n");
3999 fprintf_unfiltered (gdb_stdlog, "Nak\n");
4000 case SERIAL_TIMEOUT:
4004 break; /* Retransmit buffer */
4008 fprintf_unfiltered (gdb_stdlog, "Packet instead of Ack, ignoring it\n");
4009 /* It's probably an old response, and we're out of sync.
4010 Just gobble up the packet and ignore it. */
4011 read_frame (junkbuf, sizeof_junkbuf);
4012 continue; /* Now, go look for + */
4017 if (!started_error_output)
4019 started_error_output = 1;
4020 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
4022 fputc_unfiltered (ch & 0177, gdb_stdlog);
4026 break; /* Here to retransmit */
4030 /* This is wrong. If doing a long backtrace, the user should be
4031 able to get out next time we call QUIT, without anything as
4032 violent as interrupt_query. If we want to provide a way out of
4033 here without getting to the next QUIT, it should be based on
4034 hitting ^C twice as in remote_wait. */
4044 /* Come here after finding the start of the frame. Collect the rest
4045 into BUF, verifying the checksum, length, and handling run-length
4046 compression. No more than sizeof_buf-1 characters are read so that
4047 the buffer can be NUL terminated.
4049 Returns -1 on error, number of characters in buffer (ignoring the
4050 trailing NULL) on success. (could be extended to return one of the
4051 SERIAL status indications). */
4054 read_frame (char *buf,
4066 /* ASSERT (bc < sizeof_buf - 1) - space for trailing NUL */
4067 c = readchar (remote_timeout);
4070 case SERIAL_TIMEOUT:
4072 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
4076 fputs_filtered ("Saw new packet start in middle of old one\n",
4078 return -1; /* Start a new packet, count retries */
4081 unsigned char pktcsum;
4087 check_0 = readchar (remote_timeout);
4089 check_1 = readchar (remote_timeout);
4091 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
4094 fputs_filtered ("Timeout in checksum, retrying\n", gdb_stdlog);
4097 else if (check_0 < 0 || check_1 < 0)
4100 fputs_filtered ("Communication error in checksum\n", gdb_stdlog);
4104 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
4105 if (csum == pktcsum)
4110 fprintf_filtered (gdb_stdlog,
4111 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
4113 fputs_filtered (buf, gdb_stdlog);
4114 fputs_filtered ("\n", gdb_stdlog);
4116 /* Number of characters in buffer ignoring trailing
4120 case '*': /* Run length encoding */
4125 c = readchar (remote_timeout);
4127 repeat = c - ' ' + 3; /* Compute repeat count */
4129 /* The character before ``*'' is repeated. */
4131 if (repeat > 0 && repeat <= 255
4133 && bc + repeat - 1 < sizeof_buf - 1)
4135 memset (&buf[bc], buf[bc - 1], repeat);
4141 printf_filtered ("Repeat count %d too large for buffer: ", repeat);
4142 puts_filtered (buf);
4143 puts_filtered ("\n");
4147 if (bc < sizeof_buf - 1)
4155 puts_filtered ("Remote packet too long: ");
4156 puts_filtered (buf);
4157 puts_filtered ("\n");
4164 /* Read a packet from the remote machine, with error checking, and
4165 store it in BUF. If FOREVER, wait forever rather than timing out;
4166 this is used (in synchronous mode) to wait for a target that is is
4167 executing user code to stop. */
4168 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
4169 don't have to change all the calls to getpkt to deal with the
4170 return value, because at the moment I don't know what the right
4171 thing to do it for those. */
4179 timed_out = getpkt_sane (buf, sizeof_buf, forever);
4183 /* Read a packet from the remote machine, with error checking, and
4184 store it in BUF. If FOREVER, wait forever rather than timing out;
4185 this is used (in synchronous mode) to wait for a target that is is
4186 executing user code to stop. If FOREVER == 0, this function is
4187 allowed to time out gracefully and return an indication of this to
4190 getpkt_sane (char *buf,
4199 strcpy (buf, "timeout");
4203 timeout = watchdog > 0 ? watchdog : -1;
4207 timeout = remote_timeout;
4211 for (tries = 1; tries <= MAX_TRIES; tries++)
4213 /* This can loop forever if the remote side sends us characters
4214 continuously, but if it pauses, we'll get a zero from readchar
4215 because of timeout. Then we'll count that as a retry. */
4217 /* Note that we will only wait forever prior to the start of a packet.
4218 After that, we expect characters to arrive at a brisk pace. They
4219 should show up within remote_timeout intervals. */
4223 c = readchar (timeout);
4225 if (c == SERIAL_TIMEOUT)
4227 if (forever) /* Watchdog went off? Kill the target. */
4230 target_mourn_inferior ();
4231 error ("Watchdog has expired. Target detached.\n");
4234 fputs_filtered ("Timed out.\n", gdb_stdlog);
4240 /* We've found the start of a packet, now collect the data. */
4242 val = read_frame (buf, sizeof_buf);
4248 fprintf_unfiltered (gdb_stdlog, "Packet received: ");
4249 fputstr_unfiltered (buf, 0, gdb_stdlog);
4250 fprintf_unfiltered (gdb_stdlog, "\n");
4252 serial_write (remote_desc, "+", 1);
4256 /* Try the whole thing again. */
4258 serial_write (remote_desc, "-", 1);
4261 /* We have tried hard enough, and just can't receive the packet. Give up. */
4263 printf_unfiltered ("Ignoring packet error, continuing...\n");
4264 serial_write (remote_desc, "+", 1);
4271 /* For some mysterious reason, wait_for_inferior calls kill instead of
4272 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4276 target_mourn_inferior ();
4280 /* Use catch_errors so the user can quit from gdb even when we aren't on
4281 speaking terms with the remote system. */
4282 catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
4284 /* Don't wait for it to die. I'm not really sure it matters whether
4285 we do or not. For the existing stubs, kill is a noop. */
4286 target_mourn_inferior ();
4289 /* Async version of remote_kill. */
4291 remote_async_kill (void)
4293 /* Unregister the file descriptor from the event loop. */
4294 if (target_is_async_p ())
4295 serial_async (remote_desc, NULL, 0);
4297 /* For some mysterious reason, wait_for_inferior calls kill instead of
4298 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4302 target_mourn_inferior ();
4306 /* Use catch_errors so the user can quit from gdb even when we aren't on
4307 speaking terms with the remote system. */
4308 catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
4310 /* Don't wait for it to die. I'm not really sure it matters whether
4311 we do or not. For the existing stubs, kill is a noop. */
4312 target_mourn_inferior ();
4318 remote_mourn_1 (&remote_ops);
4322 remote_async_mourn (void)
4324 remote_mourn_1 (&remote_async_ops);
4328 extended_remote_mourn (void)
4330 /* We do _not_ want to mourn the target like this; this will
4331 remove the extended remote target from the target stack,
4332 and the next time the user says "run" it'll fail.
4334 FIXME: What is the right thing to do here? */
4336 remote_mourn_1 (&extended_remote_ops);
4340 /* Worker function for remote_mourn. */
4342 remote_mourn_1 (struct target_ops *target)
4344 unpush_target (target);
4345 generic_mourn_inferior ();
4348 /* In the extended protocol we want to be able to do things like
4349 "run" and have them basically work as expected. So we need
4350 a special create_inferior function.
4352 FIXME: One day add support for changing the exec file
4353 we're debugging, arguments and an environment. */
4356 extended_remote_create_inferior (char *exec_file, char *args, char **env)
4358 /* Rip out the breakpoints; we'll reinsert them after restarting
4359 the remote server. */
4360 remove_breakpoints ();
4362 /* Now restart the remote server. */
4363 extended_remote_restart ();
4365 /* Now put the breakpoints back in. This way we're safe if the
4366 restart function works via a unix fork on the remote side. */
4367 insert_breakpoints ();
4369 /* Clean up from the last time we were running. */
4370 clear_proceed_status ();
4372 /* Let the remote process run. */
4373 proceed (-1, TARGET_SIGNAL_0, 0);
4376 /* Async version of extended_remote_create_inferior. */
4378 extended_remote_async_create_inferior (char *exec_file, char *args, char **env)
4380 /* Rip out the breakpoints; we'll reinsert them after restarting
4381 the remote server. */
4382 remove_breakpoints ();
4384 /* If running asynchronously, register the target file descriptor
4385 with the event loop. */
4386 if (event_loop_p && target_can_async_p ())
4387 target_async (inferior_event_handler, 0);
4389 /* Now restart the remote server. */
4390 extended_remote_restart ();
4392 /* Now put the breakpoints back in. This way we're safe if the
4393 restart function works via a unix fork on the remote side. */
4394 insert_breakpoints ();
4396 /* Clean up from the last time we were running. */
4397 clear_proceed_status ();
4399 /* Let the remote process run. */
4400 proceed (-1, TARGET_SIGNAL_0, 0);
4404 /* On some machines, e.g. 68k, we may use a different breakpoint
4405 instruction than other targets; in those use
4406 DEPRECATED_REMOTE_BREAKPOINT instead of just BREAKPOINT_FROM_PC.
4407 Also, bi-endian targets may define
4408 DEPRECATED_LITTLE_REMOTE_BREAKPOINT and
4409 DEPRECATED_BIG_REMOTE_BREAKPOINT. If none of these are defined, we
4410 just call the standard routines that are in mem-break.c. */
4412 /* NOTE: cagney/2003-06-08: This is silly. A remote and simulator
4413 target should use an identical BREAKPOINT_FROM_PC. As for native,
4414 the ARCH-OS-tdep.c code can override the default. */
4416 #if defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && defined (DEPRECATED_BIG_REMOTE_BREAKPOINT) && !defined(DEPRECATED_REMOTE_BREAKPOINT)
4417 #define DEPRECATED_REMOTE_BREAKPOINT
4420 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4422 /* If the target isn't bi-endian, just pretend it is. */
4423 #if !defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && !defined (DEPRECATED_BIG_REMOTE_BREAKPOINT)
4424 #define DEPRECATED_LITTLE_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
4425 #define DEPRECATED_BIG_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
4428 static unsigned char big_break_insn[] = DEPRECATED_BIG_REMOTE_BREAKPOINT;
4429 static unsigned char little_break_insn[] = DEPRECATED_LITTLE_REMOTE_BREAKPOINT;
4431 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4433 /* Insert a breakpoint on targets that don't have any better
4434 breakpoint support. We read the contents of the target location
4435 and stash it, then overwrite it with a breakpoint instruction.
4436 ADDR is the target location in the target machine. CONTENTS_CACHE
4437 is a pointer to memory allocated for saving the target contents.
4438 It is guaranteed by the caller to be long enough to save the number
4439 of bytes returned by BREAKPOINT_FROM_PC. */
4442 remote_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
4444 struct remote_state *rs = get_remote_state ();
4445 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4450 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
4451 If it succeeds, then set the support to PACKET_ENABLE. If it
4452 fails, and the user has explicitly requested the Z support then
4453 report an error, otherwise, mark it disabled and go on. */
4455 if (remote_protocol_Z[Z_PACKET_SOFTWARE_BP].support != PACKET_DISABLE)
4457 char *buf = alloca (rs->remote_packet_size);
4460 addr = remote_address_masked (addr);
4464 p += hexnumstr (p, (ULONGEST) addr);
4465 BREAKPOINT_FROM_PC (&addr, &bp_size);
4466 sprintf (p, ",%d", bp_size);
4469 getpkt (buf, (rs->remote_packet_size), 0);
4471 switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_SOFTWARE_BP]))
4477 case PACKET_UNKNOWN:
4482 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4483 val = target_read_memory (addr, contents_cache, sizeof big_break_insn);
4487 if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
4488 val = target_write_memory (addr, (char *) big_break_insn,
4489 sizeof big_break_insn);
4491 val = target_write_memory (addr, (char *) little_break_insn,
4492 sizeof little_break_insn);
4497 return memory_insert_breakpoint (addr, contents_cache);
4498 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4502 remote_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
4504 struct remote_state *rs = get_remote_state ();
4507 if (remote_protocol_Z[Z_PACKET_SOFTWARE_BP].support != PACKET_DISABLE)
4509 char *buf = alloca (rs->remote_packet_size);
4516 addr = remote_address_masked (addr);
4517 p += hexnumstr (p, (ULONGEST) addr);
4518 BREAKPOINT_FROM_PC (&addr, &bp_size);
4519 sprintf (p, ",%d", bp_size);
4522 getpkt (buf, (rs->remote_packet_size), 0);
4524 return (buf[0] == 'E');
4527 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4528 return target_write_memory (addr, contents_cache, sizeof big_break_insn);
4530 return memory_remove_breakpoint (addr, contents_cache);
4531 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4535 watchpoint_to_Z_packet (int type)
4549 internal_error (__FILE__, __LINE__,
4550 "hw_bp_to_z: bad watchpoint type %d", type);
4555 remote_insert_watchpoint (CORE_ADDR addr, int len, int type)
4557 struct remote_state *rs = get_remote_state ();
4558 char *buf = alloca (rs->remote_packet_size);
4560 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
4562 if (remote_protocol_Z[packet].support == PACKET_DISABLE)
4563 error ("Can't set hardware watchpoints without the '%s' (%s) packet\n",
4564 remote_protocol_Z[packet].name,
4565 remote_protocol_Z[packet].title);
4567 sprintf (buf, "Z%x,", packet);
4568 p = strchr (buf, '\0');
4569 addr = remote_address_masked (addr);
4570 p += hexnumstr (p, (ULONGEST) addr);
4571 sprintf (p, ",%x", len);
4574 getpkt (buf, (rs->remote_packet_size), 0);
4576 switch (packet_ok (buf, &remote_protocol_Z[packet]))
4579 case PACKET_UNKNOWN:
4584 internal_error (__FILE__, __LINE__,
4585 "remote_insert_watchpoint: reached end of function");
4590 remote_remove_watchpoint (CORE_ADDR addr, int len, int type)
4592 struct remote_state *rs = get_remote_state ();
4593 char *buf = alloca (rs->remote_packet_size);
4595 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
4597 if (remote_protocol_Z[packet].support == PACKET_DISABLE)
4598 error ("Can't clear hardware watchpoints without the '%s' (%s) packet\n",
4599 remote_protocol_Z[packet].name,
4600 remote_protocol_Z[packet].title);
4602 sprintf (buf, "z%x,", packet);
4603 p = strchr (buf, '\0');
4604 addr = remote_address_masked (addr);
4605 p += hexnumstr (p, (ULONGEST) addr);
4606 sprintf (p, ",%x", len);
4608 getpkt (buf, (rs->remote_packet_size), 0);
4610 switch (packet_ok (buf, &remote_protocol_Z[packet]))
4613 case PACKET_UNKNOWN:
4618 internal_error (__FILE__, __LINE__,
4619 "remote_remove_watchpoint: reached end of function");
4623 int remote_hw_watchpoint_limit = -1;
4624 int remote_hw_breakpoint_limit = -1;
4627 remote_check_watch_resources (int type, int cnt, int ot)
4629 if (type == bp_hardware_breakpoint)
4631 if (remote_hw_breakpoint_limit == 0)
4633 else if (remote_hw_breakpoint_limit < 0)
4635 else if (cnt <= remote_hw_breakpoint_limit)
4640 if (remote_hw_watchpoint_limit == 0)
4642 else if (remote_hw_watchpoint_limit < 0)
4646 else if (cnt <= remote_hw_watchpoint_limit)
4653 remote_stopped_by_watchpoint (void)
4655 return remote_stopped_by_watchpoint_p;
4659 remote_stopped_data_address (void)
4661 if (remote_stopped_by_watchpoint ())
4662 return remote_watch_data_address;
4663 return (CORE_ADDR)0;
4668 remote_insert_hw_breakpoint (CORE_ADDR addr, char *shadow)
4671 struct remote_state *rs = get_remote_state ();
4672 char *buf = alloca (rs->remote_packet_size);
4675 /* The length field should be set to the size of a breakpoint
4678 BREAKPOINT_FROM_PC (&addr, &len);
4680 if (remote_protocol_Z[Z_PACKET_HARDWARE_BP].support == PACKET_DISABLE)
4681 error ("Can't set hardware breakpoint without the '%s' (%s) packet\n",
4682 remote_protocol_Z[Z_PACKET_HARDWARE_BP].name,
4683 remote_protocol_Z[Z_PACKET_HARDWARE_BP].title);
4689 addr = remote_address_masked (addr);
4690 p += hexnumstr (p, (ULONGEST) addr);
4691 sprintf (p, ",%x", len);
4694 getpkt (buf, (rs->remote_packet_size), 0);
4696 switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_HARDWARE_BP]))
4699 case PACKET_UNKNOWN:
4704 internal_error (__FILE__, __LINE__,
4705 "remote_insert_hw_breakpoint: reached end of function");
4710 remote_remove_hw_breakpoint (CORE_ADDR addr, char *shadow)
4713 struct remote_state *rs = get_remote_state ();
4714 char *buf = alloca (rs->remote_packet_size);
4717 /* The length field should be set to the size of a breakpoint
4720 BREAKPOINT_FROM_PC (&addr, &len);
4722 if (remote_protocol_Z[Z_PACKET_HARDWARE_BP].support == PACKET_DISABLE)
4723 error ("Can't clear hardware breakpoint without the '%s' (%s) packet\n",
4724 remote_protocol_Z[Z_PACKET_HARDWARE_BP].name,
4725 remote_protocol_Z[Z_PACKET_HARDWARE_BP].title);
4731 addr = remote_address_masked (addr);
4732 p += hexnumstr (p, (ULONGEST) addr);
4733 sprintf (p, ",%x", len);
4736 getpkt (buf, (rs->remote_packet_size), 0);
4738 switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_HARDWARE_BP]))
4741 case PACKET_UNKNOWN:
4746 internal_error (__FILE__, __LINE__,
4747 "remote_remove_hw_breakpoint: reached end of function");
4750 /* Some targets are only capable of doing downloads, and afterwards
4751 they switch to the remote serial protocol. This function provides
4752 a clean way to get from the download target to the remote target.
4753 It's basically just a wrapper so that we don't have to expose any
4754 of the internal workings of remote.c.
4756 Prior to calling this routine, you should shutdown the current
4757 target code, else you will get the "A program is being debugged
4758 already..." message. Usually a call to pop_target() suffices. */
4761 push_remote_target (char *name, int from_tty)
4763 printf_filtered ("Switching to remote protocol\n");
4764 remote_open (name, from_tty);
4767 /* Table used by the crc32 function to calcuate the checksum. */
4769 static unsigned long crc32_table[256] =
4772 static unsigned long
4773 crc32 (unsigned char *buf, int len, unsigned int crc)
4775 if (!crc32_table[1])
4777 /* Initialize the CRC table and the decoding table. */
4781 for (i = 0; i < 256; i++)
4783 for (c = i << 24, j = 8; j > 0; --j)
4784 c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
4791 crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255];
4797 /* compare-sections command
4799 With no arguments, compares each loadable section in the exec bfd
4800 with the same memory range on the target, and reports mismatches.
4801 Useful for verifying the image on the target against the exec file.
4802 Depends on the target understanding the new "qCRC:" request. */
4804 /* FIXME: cagney/1999-10-26: This command should be broken down into a
4805 target method (target verify memory) and generic version of the
4806 actual command. This will allow other high-level code (especially
4807 generic_load()) to make use of this target functionality. */
4810 compare_sections_command (char *args, int from_tty)
4812 struct remote_state *rs = get_remote_state ();
4814 unsigned long host_crc, target_crc;
4815 extern bfd *exec_bfd;
4816 struct cleanup *old_chain;
4819 const char *sectname;
4820 char *buf = alloca (rs->remote_packet_size);
4827 error ("command cannot be used without an exec file");
4828 if (!current_target.to_shortname ||
4829 strcmp (current_target.to_shortname, "remote") != 0)
4830 error ("command can only be used with remote target");
4832 for (s = exec_bfd->sections; s; s = s->next)
4834 if (!(s->flags & SEC_LOAD))
4835 continue; /* skip non-loadable section */
4837 size = bfd_get_section_size (s);
4839 continue; /* skip zero-length section */
4841 sectname = bfd_get_section_name (exec_bfd, s);
4842 if (args && strcmp (args, sectname) != 0)
4843 continue; /* not the section selected by user */
4845 matched = 1; /* do this section */
4847 /* FIXME: assumes lma can fit into long */
4848 sprintf (buf, "qCRC:%lx,%lx", (long) lma, (long) size);
4851 /* be clever; compute the host_crc before waiting for target reply */
4852 sectdata = xmalloc (size);
4853 old_chain = make_cleanup (xfree, sectdata);
4854 bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
4855 host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff);
4857 getpkt (buf, (rs->remote_packet_size), 0);
4859 error ("target memory fault, section %s, range 0x%s -- 0x%s",
4860 sectname, paddr (lma), paddr (lma + size));
4862 error ("remote target does not support this operation");
4864 for (target_crc = 0, tmp = &buf[1]; *tmp; tmp++)
4865 target_crc = target_crc * 16 + fromhex (*tmp);
4867 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
4868 sectname, paddr (lma), paddr (lma + size));
4869 if (host_crc == target_crc)
4870 printf_filtered ("matched.\n");
4873 printf_filtered ("MIS-MATCHED!\n");
4877 do_cleanups (old_chain);
4880 warning ("One or more sections of the remote executable does not match\n\
4881 the loaded file\n");
4882 if (args && !matched)
4883 printf_filtered ("No loaded section named '%s'.\n", args);
4887 remote_xfer_partial (struct target_ops *ops, enum target_object object,
4888 const char *annex, void *readbuf, const void *writebuf,
4889 ULONGEST offset, LONGEST len)
4891 struct remote_state *rs = get_remote_state ();
4893 char *buf2 = alloca (rs->remote_packet_size);
4894 char *p2 = &buf2[0];
4897 /* Only handle reads. */
4898 if (writebuf != NULL || readbuf == NULL)
4901 /* Map pre-existing objects onto letters. DO NOT do this for new
4902 objects!!! Instead specify new query packets. */
4905 case TARGET_OBJECT_KOD:
4908 case TARGET_OBJECT_AVR:
4912 case TARGET_OBJECT_AUXV:
4913 if (remote_protocol_qPart_auxv.support != PACKET_DISABLE)
4915 unsigned int total = 0;
4918 LONGEST n = min ((rs->remote_packet_size - 2) / 2, len);
4919 snprintf (buf2, rs->remote_packet_size,
4920 "qPart:auxv:read::%s,%s",
4921 phex_nz (offset, sizeof offset),
4922 phex_nz (n, sizeof n));
4925 return total > 0 ? total : i;
4927 getpkt (buf2, rs->remote_packet_size, 0);
4928 if (packet_ok (buf2, &remote_protocol_qPart_auxv) != PACKET_OK)
4929 return total > 0 ? total : -1;
4930 if (buf2[0] == 'O' && buf2[1] == 'K' && buf2[2] == '\0')
4931 break; /* Got EOF indicator. */
4932 /* Got some data. */
4933 i = hex2bin (buf2, readbuf, len);
4936 readbuf = (void *) ((char *) readbuf + i);
4946 case TARGET_OBJECT_DIRTY:
4947 if (remote_protocol_qPart_dirty.support != PACKET_DISABLE)
4949 snprintf (buf2, rs->remote_packet_size, "qPart:dirty:read::%lx",
4950 (long)(offset >> 3));
4955 getpkt (buf2, rs->remote_packet_size, 0);
4956 if (packet_ok (buf2, &remote_protocol_qPart_dirty) != PACKET_OK)
4958 i = hex2bin (buf2, readbuf, len);
4967 /* Note: a zero OFFSET and LEN can be used to query the minimum
4969 if (offset == 0 && len == 0)
4970 return (rs->remote_packet_size);
4971 /* Minimum outbuf size is (rs->remote_packet_size) - if bufsiz is
4972 not large enough let the caller. */
4973 if (len < (rs->remote_packet_size))
4975 len = rs->remote_packet_size;
4977 /* except for querying the minimum buffer size, target must be open */
4979 error ("remote query is only available after target open");
4981 gdb_assert (annex != NULL);
4982 gdb_assert (readbuf != NULL);
4987 /* we used one buffer char for the remote protocol q command and another
4988 for the query type. As the remote protocol encapsulation uses 4 chars
4989 plus one extra in case we are debugging (remote_debug),
4990 we have PBUFZIZ - 7 left to pack the query string */
4992 while (annex[i] && (i < ((rs->remote_packet_size) - 8)))
4994 /* Bad caller may have sent forbidden characters. */
4995 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
5000 gdb_assert (annex[i] == '\0');
5006 getpkt (readbuf, len, 0);
5008 return strlen (readbuf);
5012 remote_rcmd (char *command,
5013 struct ui_file *outbuf)
5015 struct remote_state *rs = get_remote_state ();
5017 char *buf = alloca (rs->remote_packet_size);
5021 error ("remote rcmd is only available after target open");
5023 /* Send a NULL command across as an empty command */
5024 if (command == NULL)
5027 /* The query prefix */
5028 strcpy (buf, "qRcmd,");
5029 p = strchr (buf, '\0');
5031 if ((strlen (buf) + strlen (command) * 2 + 8/*misc*/) > (rs->remote_packet_size))
5032 error ("\"monitor\" command ``%s'' is too long\n", command);
5034 /* Encode the actual command */
5035 bin2hex (command, p, 0);
5037 if (putpkt (buf) < 0)
5038 error ("Communication problem with target\n");
5040 /* get/display the response */
5043 /* XXX - see also tracepoint.c:remote_get_noisy_reply() */
5045 getpkt (buf, (rs->remote_packet_size), 0);
5047 error ("Target does not support this command\n");
5048 if (buf[0] == 'O' && buf[1] != 'K')
5050 remote_console_output (buf + 1); /* 'O' message from stub */
5053 if (strcmp (buf, "OK") == 0)
5055 if (strlen (buf) == 3 && buf[0] == 'E'
5056 && isdigit (buf[1]) && isdigit (buf[2]))
5058 error ("Protocol error with Rcmd");
5060 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
5062 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
5063 fputc_unfiltered (c, outbuf);
5070 packet_command (char *args, int from_tty)
5072 struct remote_state *rs = get_remote_state ();
5073 char *buf = alloca (rs->remote_packet_size);
5076 error ("command can only be used with remote target");
5079 error ("remote-packet command requires packet text as argument");
5081 puts_filtered ("sending: ");
5082 print_packet (args);
5083 puts_filtered ("\n");
5086 getpkt (buf, (rs->remote_packet_size), 0);
5087 puts_filtered ("received: ");
5089 puts_filtered ("\n");
5093 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------------- */
5095 static void display_thread_info (struct gdb_ext_thread_info *info);
5097 static void threadset_test_cmd (char *cmd, int tty);
5099 static void threadalive_test (char *cmd, int tty);
5101 static void threadlist_test_cmd (char *cmd, int tty);
5103 int get_and_display_threadinfo (threadref * ref);
5105 static void threadinfo_test_cmd (char *cmd, int tty);
5107 static int thread_display_step (threadref * ref, void *context);
5109 static void threadlist_update_test_cmd (char *cmd, int tty);
5111 static void init_remote_threadtests (void);
5113 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid */
5116 threadset_test_cmd (char *cmd, int tty)
5118 int sample_thread = SAMPLE_THREAD;
5120 printf_filtered ("Remote threadset test\n");
5121 set_thread (sample_thread, 1);
5126 threadalive_test (char *cmd, int tty)
5128 int sample_thread = SAMPLE_THREAD;
5130 if (remote_thread_alive (pid_to_ptid (sample_thread)))
5131 printf_filtered ("PASS: Thread alive test\n");
5133 printf_filtered ("FAIL: Thread alive test\n");
5136 void output_threadid (char *title, threadref * ref);
5139 output_threadid (char *title, threadref *ref)
5143 pack_threadid (&hexid[0], ref); /* Convert threead id into hex */
5145 printf_filtered ("%s %s\n", title, (&hexid[0]));
5149 threadlist_test_cmd (char *cmd, int tty)
5152 threadref nextthread;
5153 int done, result_count;
5154 threadref threadlist[3];
5156 printf_filtered ("Remote Threadlist test\n");
5157 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
5158 &result_count, &threadlist[0]))
5159 printf_filtered ("FAIL: threadlist test\n");
5162 threadref *scan = threadlist;
5163 threadref *limit = scan + result_count;
5165 while (scan < limit)
5166 output_threadid (" thread ", scan++);
5171 display_thread_info (struct gdb_ext_thread_info *info)
5173 output_threadid ("Threadid: ", &info->threadid);
5174 printf_filtered ("Name: %s\n ", info->shortname);
5175 printf_filtered ("State: %s\n", info->display);
5176 printf_filtered ("other: %s\n\n", info->more_display);
5180 get_and_display_threadinfo (threadref *ref)
5184 struct gdb_ext_thread_info threadinfo;
5186 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
5187 | TAG_MOREDISPLAY | TAG_DISPLAY;
5188 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
5189 display_thread_info (&threadinfo);
5194 threadinfo_test_cmd (char *cmd, int tty)
5196 int athread = SAMPLE_THREAD;
5200 int_to_threadref (&thread, athread);
5201 printf_filtered ("Remote Threadinfo test\n");
5202 if (!get_and_display_threadinfo (&thread))
5203 printf_filtered ("FAIL cannot get thread info\n");
5207 thread_display_step (threadref *ref, void *context)
5209 /* output_threadid(" threadstep ",ref); *//* simple test */
5210 return get_and_display_threadinfo (ref);
5214 threadlist_update_test_cmd (char *cmd, int tty)
5216 printf_filtered ("Remote Threadlist update test\n");
5217 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
5221 init_remote_threadtests (void)
5223 add_com ("tlist", class_obscure, threadlist_test_cmd,
5224 "Fetch and print the remote list of thread identifiers, one pkt only");
5225 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
5226 "Fetch and display info about one thread");
5227 add_com ("tset", class_obscure, threadset_test_cmd,
5228 "Test setting to a different thread");
5229 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
5230 "Iterate through updating all remote thread info");
5231 add_com ("talive", class_obscure, threadalive_test,
5232 " Remote thread alive test ");
5237 /* Convert a thread ID to a string. Returns the string in a static
5241 remote_pid_to_str (ptid_t ptid)
5243 static char buf[30];
5245 sprintf (buf, "Thread %d", PIDGET (ptid));
5250 init_remote_ops (void)
5252 remote_ops.to_shortname = "remote";
5253 remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
5255 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5256 Specify the serial device it is connected to\n\
5257 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
5258 remote_ops.to_open = remote_open;
5259 remote_ops.to_close = remote_close;
5260 remote_ops.to_detach = remote_detach;
5261 remote_ops.to_disconnect = remote_disconnect;
5262 remote_ops.to_resume = remote_resume;
5263 remote_ops.to_wait = remote_wait;
5264 remote_ops.to_fetch_registers = remote_fetch_registers;
5265 remote_ops.to_store_registers = remote_store_registers;
5266 remote_ops.to_prepare_to_store = remote_prepare_to_store;
5267 remote_ops.to_xfer_memory = remote_xfer_memory;
5268 remote_ops.to_files_info = remote_files_info;
5269 remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
5270 remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
5271 remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
5272 remote_ops.to_stopped_data_address = remote_stopped_data_address;
5273 remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
5274 remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
5275 remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
5276 remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
5277 remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
5278 remote_ops.to_kill = remote_kill;
5279 remote_ops.to_load = generic_load;
5280 remote_ops.to_mourn_inferior = remote_mourn;
5281 remote_ops.to_thread_alive = remote_thread_alive;
5282 remote_ops.to_find_new_threads = remote_threads_info;
5283 remote_ops.to_pid_to_str = remote_pid_to_str;
5284 remote_ops.to_extra_thread_info = remote_threads_extra_info;
5285 remote_ops.to_stop = remote_stop;
5286 remote_ops.to_xfer_partial = remote_xfer_partial;
5287 remote_ops.to_rcmd = remote_rcmd;
5288 remote_ops.to_stratum = process_stratum;
5289 remote_ops.to_has_all_memory = 1;
5290 remote_ops.to_has_memory = 1;
5291 remote_ops.to_has_stack = 1;
5292 remote_ops.to_has_registers = 1;
5293 remote_ops.to_has_execution = 1;
5294 remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
5295 remote_ops.to_magic = OPS_MAGIC;
5298 /* Set up the extended remote vector by making a copy of the standard
5299 remote vector and adding to it. */
5302 init_extended_remote_ops (void)
5304 extended_remote_ops = remote_ops;
5306 extended_remote_ops.to_shortname = "extended-remote";
5307 extended_remote_ops.to_longname =
5308 "Extended remote serial target in gdb-specific protocol";
5309 extended_remote_ops.to_doc =
5310 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5311 Specify the serial device it is connected to (e.g. /dev/ttya).",
5312 extended_remote_ops.to_open = extended_remote_open;
5313 extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
5314 extended_remote_ops.to_mourn_inferior = extended_remote_mourn;
5318 remote_can_async_p (void)
5320 /* We're async whenever the serial device is. */
5321 return (current_target.to_async_mask_value) && serial_can_async_p (remote_desc);
5325 remote_is_async_p (void)
5327 /* We're async whenever the serial device is. */
5328 return (current_target.to_async_mask_value) && serial_is_async_p (remote_desc);
5331 /* Pass the SERIAL event on and up to the client. One day this code
5332 will be able to delay notifying the client of an event until the
5333 point where an entire packet has been received. */
5335 static void (*async_client_callback) (enum inferior_event_type event_type, void *context);
5336 static void *async_client_context;
5337 static serial_event_ftype remote_async_serial_handler;
5340 remote_async_serial_handler (struct serial *scb, void *context)
5342 /* Don't propogate error information up to the client. Instead let
5343 the client find out about the error by querying the target. */
5344 async_client_callback (INF_REG_EVENT, async_client_context);
5348 remote_async (void (*callback) (enum inferior_event_type event_type, void *context), void *context)
5350 if (current_target.to_async_mask_value == 0)
5351 internal_error (__FILE__, __LINE__,
5352 "Calling remote_async when async is masked");
5354 if (callback != NULL)
5356 serial_async (remote_desc, remote_async_serial_handler, NULL);
5357 async_client_callback = callback;
5358 async_client_context = context;
5361 serial_async (remote_desc, NULL, NULL);
5364 /* Target async and target extended-async.
5366 This are temporary targets, until it is all tested. Eventually
5367 async support will be incorporated int the usual 'remote'
5371 init_remote_async_ops (void)
5373 remote_async_ops.to_shortname = "async";
5374 remote_async_ops.to_longname = "Remote serial target in async version of the gdb-specific protocol";
5375 remote_async_ops.to_doc =
5376 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5377 Specify the serial device it is connected to (e.g. /dev/ttya).";
5378 remote_async_ops.to_open = remote_async_open;
5379 remote_async_ops.to_close = remote_close;
5380 remote_async_ops.to_detach = remote_detach;
5381 remote_async_ops.to_disconnect = remote_disconnect;
5382 remote_async_ops.to_resume = remote_async_resume;
5383 remote_async_ops.to_wait = remote_async_wait;
5384 remote_async_ops.to_fetch_registers = remote_fetch_registers;
5385 remote_async_ops.to_store_registers = remote_store_registers;
5386 remote_async_ops.to_prepare_to_store = remote_prepare_to_store;
5387 remote_async_ops.to_xfer_memory = remote_xfer_memory;
5388 remote_async_ops.to_files_info = remote_files_info;
5389 remote_async_ops.to_insert_breakpoint = remote_insert_breakpoint;
5390 remote_async_ops.to_remove_breakpoint = remote_remove_breakpoint;
5391 remote_async_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
5392 remote_async_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
5393 remote_async_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
5394 remote_async_ops.to_insert_watchpoint = remote_insert_watchpoint;
5395 remote_async_ops.to_remove_watchpoint = remote_remove_watchpoint;
5396 remote_async_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
5397 remote_async_ops.to_stopped_data_address = remote_stopped_data_address;
5398 remote_async_ops.to_terminal_inferior = remote_async_terminal_inferior;
5399 remote_async_ops.to_terminal_ours = remote_async_terminal_ours;
5400 remote_async_ops.to_kill = remote_async_kill;
5401 remote_async_ops.to_load = generic_load;
5402 remote_async_ops.to_mourn_inferior = remote_async_mourn;
5403 remote_async_ops.to_thread_alive = remote_thread_alive;
5404 remote_async_ops.to_find_new_threads = remote_threads_info;
5405 remote_async_ops.to_pid_to_str = remote_pid_to_str;
5406 remote_async_ops.to_extra_thread_info = remote_threads_extra_info;
5407 remote_async_ops.to_stop = remote_stop;
5408 remote_async_ops.to_xfer_partial = remote_xfer_partial;
5409 remote_async_ops.to_rcmd = remote_rcmd;
5410 remote_async_ops.to_stratum = process_stratum;
5411 remote_async_ops.to_has_all_memory = 1;
5412 remote_async_ops.to_has_memory = 1;
5413 remote_async_ops.to_has_stack = 1;
5414 remote_async_ops.to_has_registers = 1;
5415 remote_async_ops.to_has_execution = 1;
5416 remote_async_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
5417 remote_async_ops.to_can_async_p = remote_can_async_p;
5418 remote_async_ops.to_is_async_p = remote_is_async_p;
5419 remote_async_ops.to_async = remote_async;
5420 remote_async_ops.to_async_mask_value = 1;
5421 remote_async_ops.to_magic = OPS_MAGIC;
5424 /* Set up the async extended remote vector by making a copy of the standard
5425 remote vector and adding to it. */
5428 init_extended_async_remote_ops (void)
5430 extended_async_remote_ops = remote_async_ops;
5432 extended_async_remote_ops.to_shortname = "extended-async";
5433 extended_async_remote_ops.to_longname =
5434 "Extended remote serial target in async gdb-specific protocol";
5435 extended_async_remote_ops.to_doc =
5436 "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
5437 Specify the serial device it is connected to (e.g. /dev/ttya).",
5438 extended_async_remote_ops.to_open = extended_remote_async_open;
5439 extended_async_remote_ops.to_create_inferior = extended_remote_async_create_inferior;
5440 extended_async_remote_ops.to_mourn_inferior = extended_remote_mourn;
5444 set_remote_cmd (char *args, int from_tty)
5449 show_remote_cmd (char *args, int from_tty)
5451 /* FIXME: cagney/2002-06-15: This function should iterate over
5452 remote_show_cmdlist for a list of sub commands to show. */
5453 show_remote_protocol_Z_packet_cmd (args, from_tty, NULL);
5454 show_remote_protocol_e_packet_cmd (args, from_tty, NULL);
5455 show_remote_protocol_E_packet_cmd (args, from_tty, NULL);
5456 show_remote_protocol_P_packet_cmd (args, from_tty, NULL);
5457 show_remote_protocol_qSymbol_packet_cmd (args, from_tty, NULL);
5458 show_remote_protocol_vcont_packet_cmd (args, from_tty, NULL);
5459 show_remote_protocol_binary_download_cmd (args, from_tty, NULL);
5460 show_remote_protocol_qPart_auxv_packet_cmd (args, from_tty, NULL);
5461 show_remote_protocol_qPart_dirty_packet_cmd (args, from_tty, NULL);
5465 build_remote_gdbarch_data (void)
5467 remote_address_size = TARGET_ADDR_BIT;
5470 /* Saved pointer to previous owner of the new_objfile event. */
5471 static void (*remote_new_objfile_chain) (struct objfile *);
5473 /* Function to be called whenever a new objfile (shlib) is detected. */
5475 remote_new_objfile (struct objfile *objfile)
5477 if (remote_desc != 0) /* Have a remote connection */
5479 remote_check_symbols (objfile);
5481 /* Call predecessor on chain, if any. */
5482 if (remote_new_objfile_chain != 0 &&
5484 remote_new_objfile_chain (objfile);
5488 _initialize_remote (void)
5490 static struct cmd_list_element *remote_set_cmdlist;
5491 static struct cmd_list_element *remote_show_cmdlist;
5492 struct cmd_list_element *tmpcmd;
5494 /* architecture specific data */
5495 remote_gdbarch_data_handle = register_gdbarch_data (init_remote_state);
5497 /* Old tacky stuff. NOTE: This comes after the remote protocol so
5498 that the remote protocol has been initialized. */
5499 DEPRECATED_REGISTER_GDBARCH_SWAP (remote_address_size);
5500 deprecated_register_gdbarch_swap (NULL, 0, build_remote_gdbarch_data);
5503 add_target (&remote_ops);
5505 init_extended_remote_ops ();
5506 add_target (&extended_remote_ops);
5508 init_remote_async_ops ();
5509 add_target (&remote_async_ops);
5511 init_extended_async_remote_ops ();
5512 add_target (&extended_async_remote_ops);
5514 /* Hook into new objfile notification. */
5515 remote_new_objfile_chain = target_new_objfile_hook;
5516 target_new_objfile_hook = remote_new_objfile;
5519 init_remote_threadtests ();
5522 /* set/show remote ... */
5524 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, "\
5525 Remote protocol specific variables\n\
5526 Configure various remote-protocol specific variables such as\n\
5527 the packets being used",
5528 &remote_set_cmdlist, "set remote ",
5529 0/*allow-unknown*/, &setlist);
5530 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, "\
5531 Remote protocol specific variables\n\
5532 Configure various remote-protocol specific variables such as\n\
5533 the packets being used",
5534 &remote_show_cmdlist, "show remote ",
5535 0/*allow-unknown*/, &showlist);
5537 add_cmd ("compare-sections", class_obscure, compare_sections_command,
5538 "Compare section data on target to the exec file.\n\
5539 Argument is a single section name (default: all loaded sections).",
5542 add_cmd ("packet", class_maintenance, packet_command,
5543 "Send an arbitrary packet to a remote target.\n\
5544 maintenance packet TEXT\n\
5545 If GDB is talking to an inferior via the GDB serial protocol, then\n\
5546 this command sends the string TEXT to the inferior, and displays the\n\
5547 response packet. GDB supplies the initial `$' character, and the\n\
5548 terminating `#' character and checksum.",
5551 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break,
5552 "Set whether to send break if interrupted.\n",
5553 "Show whether to send break if interrupted.\n",
5555 &setlist, &showlist);
5557 /* Install commands for configuring memory read/write packets. */
5559 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size,
5560 "Set the maximum number of bytes per memory write packet (deprecated).\n",
5562 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size,
5563 "Show the maximum number of bytes per memory write packet (deprecated).\n",
5565 add_cmd ("memory-write-packet-size", no_class,
5566 set_memory_write_packet_size,
5567 "Set the maximum number of bytes per memory-write packet.\n"
5568 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5569 "default packet size. The actual limit is further reduced\n"
5570 "dependent on the target. Specify ``fixed'' to disable the\n"
5571 "further restriction and ``limit'' to enable that restriction\n",
5572 &remote_set_cmdlist);
5573 add_cmd ("memory-read-packet-size", no_class,
5574 set_memory_read_packet_size,
5575 "Set the maximum number of bytes per memory-read packet.\n"
5576 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5577 "default packet size. The actual limit is further reduced\n"
5578 "dependent on the target. Specify ``fixed'' to disable the\n"
5579 "further restriction and ``limit'' to enable that restriction\n",
5580 &remote_set_cmdlist);
5581 add_cmd ("memory-write-packet-size", no_class,
5582 show_memory_write_packet_size,
5583 "Show the maximum number of bytes per memory-write packet.\n",
5584 &remote_show_cmdlist);
5585 add_cmd ("memory-read-packet-size", no_class,
5586 show_memory_read_packet_size,
5587 "Show the maximum number of bytes per memory-read packet.\n",
5588 &remote_show_cmdlist);
5590 add_setshow_cmd ("hardware-watchpoint-limit", no_class,
5591 var_zinteger, &remote_hw_watchpoint_limit, "\
5592 Set the maximum number of target hardware watchpoints.\n\
5593 Specify a negative limit for unlimited.", "\
5594 Show the maximum number of target hardware watchpoints.\n",
5595 NULL, NULL, &remote_set_cmdlist, &remote_show_cmdlist);
5596 add_setshow_cmd ("hardware-breakpoint-limit", no_class,
5597 var_zinteger, &remote_hw_breakpoint_limit, "\
5598 Set the maximum number of target hardware breakpoints.\n\
5599 Specify a negative limit for unlimited.", "\
5600 Show the maximum number of target hardware breakpoints.\n",
5601 NULL, NULL, &remote_set_cmdlist, &remote_show_cmdlist);
5604 (add_set_cmd ("remoteaddresssize", class_obscure,
5605 var_integer, (char *) &remote_address_size,
5606 "Set the maximum size of the address (in bits) \
5607 in a memory packet.\n",
5611 add_packet_config_cmd (&remote_protocol_binary_download,
5612 "X", "binary-download",
5613 set_remote_protocol_binary_download_cmd,
5614 show_remote_protocol_binary_download_cmd,
5615 &remote_set_cmdlist, &remote_show_cmdlist,
5618 /* XXXX - should ``set remotebinarydownload'' be retained for
5621 (add_set_cmd ("remotebinarydownload", no_class,
5622 var_boolean, (char *) &remote_binary_download,
5623 "Set binary downloads.\n", &setlist),
5627 add_packet_config_cmd (&remote_protocol_vcont,
5628 "vCont", "verbose-resume",
5629 set_remote_protocol_vcont_packet_cmd,
5630 show_remote_protocol_vcont_packet_cmd,
5631 &remote_set_cmdlist, &remote_show_cmdlist,
5634 add_packet_config_cmd (&remote_protocol_qSymbol,
5635 "qSymbol", "symbol-lookup",
5636 set_remote_protocol_qSymbol_packet_cmd,
5637 show_remote_protocol_qSymbol_packet_cmd,
5638 &remote_set_cmdlist, &remote_show_cmdlist,
5641 add_packet_config_cmd (&remote_protocol_e,
5642 "e", "step-over-range",
5643 set_remote_protocol_e_packet_cmd,
5644 show_remote_protocol_e_packet_cmd,
5645 &remote_set_cmdlist, &remote_show_cmdlist,
5647 /* Disable by default. The ``e'' packet has nasty interactions with
5648 the threading code - it relies on global state. */
5649 remote_protocol_e.detect = AUTO_BOOLEAN_FALSE;
5650 update_packet_config (&remote_protocol_e);
5652 add_packet_config_cmd (&remote_protocol_E,
5653 "E", "step-over-range-w-signal",
5654 set_remote_protocol_E_packet_cmd,
5655 show_remote_protocol_E_packet_cmd,
5656 &remote_set_cmdlist, &remote_show_cmdlist,
5658 /* Disable by default. The ``e'' packet has nasty interactions with
5659 the threading code - it relies on global state. */
5660 remote_protocol_E.detect = AUTO_BOOLEAN_FALSE;
5661 update_packet_config (&remote_protocol_E);
5663 add_packet_config_cmd (&remote_protocol_P,
5664 "P", "set-register",
5665 set_remote_protocol_P_packet_cmd,
5666 show_remote_protocol_P_packet_cmd,
5667 &remote_set_cmdlist, &remote_show_cmdlist,
5670 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP],
5671 "Z0", "software-breakpoint",
5672 set_remote_protocol_Z_software_bp_packet_cmd,
5673 show_remote_protocol_Z_software_bp_packet_cmd,
5674 &remote_set_cmdlist, &remote_show_cmdlist,
5677 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_HARDWARE_BP],
5678 "Z1", "hardware-breakpoint",
5679 set_remote_protocol_Z_hardware_bp_packet_cmd,
5680 show_remote_protocol_Z_hardware_bp_packet_cmd,
5681 &remote_set_cmdlist, &remote_show_cmdlist,
5684 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_WRITE_WP],
5685 "Z2", "write-watchpoint",
5686 set_remote_protocol_Z_write_wp_packet_cmd,
5687 show_remote_protocol_Z_write_wp_packet_cmd,
5688 &remote_set_cmdlist, &remote_show_cmdlist,
5691 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_READ_WP],
5692 "Z3", "read-watchpoint",
5693 set_remote_protocol_Z_read_wp_packet_cmd,
5694 show_remote_protocol_Z_read_wp_packet_cmd,
5695 &remote_set_cmdlist, &remote_show_cmdlist,
5698 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_ACCESS_WP],
5699 "Z4", "access-watchpoint",
5700 set_remote_protocol_Z_access_wp_packet_cmd,
5701 show_remote_protocol_Z_access_wp_packet_cmd,
5702 &remote_set_cmdlist, &remote_show_cmdlist,
5705 add_packet_config_cmd (&remote_protocol_qPart_auxv,
5706 "qPart_auxv", "read-aux-vector",
5707 set_remote_protocol_qPart_auxv_packet_cmd,
5708 show_remote_protocol_qPart_auxv_packet_cmd,
5709 &remote_set_cmdlist, &remote_show_cmdlist,
5712 add_packet_config_cmd (&remote_protocol_qPart_dirty,
5713 "qPart_dirty", "read-dirty-registers",
5714 set_remote_protocol_qPart_dirty_packet_cmd,
5715 show_remote_protocol_qPart_dirty_packet_cmd,
5716 &remote_set_cmdlist, &remote_show_cmdlist,
5719 /* Keep the old ``set remote Z-packet ...'' working. */
5720 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
5721 &remote_Z_packet_detect, "\
5722 Set use of remote protocol `Z' packets",
5723 "Show use of remote protocol `Z' packets ",
5724 set_remote_protocol_Z_packet_cmd,
5725 show_remote_protocol_Z_packet_cmd,
5726 &remote_set_cmdlist, &remote_show_cmdlist);
5728 /* Eventually initialize fileio. See fileio.c */
5729 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);