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 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 /* See the GDB User Guide for details of the GDB remote protocol. */
26 #include "gdb_string.h"
33 /*#include "terminal.h" */
36 #include "gdb-stabs.h"
37 #include "gdbthread.h"
41 #include "gdb_assert.h"
46 #include <sys/types.h>
49 #include "event-loop.h"
50 #include "event-top.h"
56 #include "gdbcore.h" /* for exec_bfd */
58 /* Prototypes for local functions */
59 static void cleanup_sigint_signal_handler (void *dummy);
60 static void initialize_sigint_signal_handler (void);
61 static int getpkt_sane (char *buf, long sizeof_buf, int forever);
63 static void handle_remote_sigint (int);
64 static void handle_remote_sigint_twice (int);
65 static void async_remote_interrupt (gdb_client_data);
66 void async_remote_interrupt_twice (gdb_client_data);
68 static void build_remote_gdbarch_data (void);
70 static int remote_write_bytes (CORE_ADDR memaddr, char *myaddr, int len);
72 static int remote_read_bytes (CORE_ADDR memaddr, char *myaddr, int len);
74 static void remote_files_info (struct target_ops *ignore);
76 static int remote_xfer_memory (CORE_ADDR memaddr, char *myaddr,
77 int len, int should_write,
78 struct mem_attrib *attrib,
79 struct target_ops *target);
81 static void remote_prepare_to_store (void);
83 static void remote_fetch_registers (int regno);
85 static void remote_resume (ptid_t ptid, int step,
86 enum target_signal siggnal);
87 static void remote_async_resume (ptid_t ptid, int step,
88 enum target_signal siggnal);
89 static int remote_start_remote (PTR);
91 static void remote_open (char *name, int from_tty);
92 static void remote_async_open (char *name, int from_tty);
94 static void extended_remote_open (char *name, int from_tty);
95 static void extended_remote_async_open (char *name, int from_tty);
97 static void remote_open_1 (char *, int, struct target_ops *, int extended_p);
98 static void remote_async_open_1 (char *, int, struct target_ops *,
101 static void remote_close (int quitting);
103 static void remote_store_registers (int regno);
105 static void remote_mourn (void);
106 static void remote_async_mourn (void);
108 static void extended_remote_restart (void);
110 static void extended_remote_mourn (void);
112 static void extended_remote_create_inferior (char *, char *, char **);
113 static void extended_remote_async_create_inferior (char *, char *, char **);
115 static void remote_mourn_1 (struct target_ops *);
117 static void remote_send (char *buf, long sizeof_buf);
119 static int readchar (int timeout);
121 static ptid_t remote_wait (ptid_t ptid,
122 struct target_waitstatus *status);
123 static ptid_t remote_async_wait (ptid_t ptid,
124 struct target_waitstatus *status);
126 static void remote_kill (void);
127 static void remote_async_kill (void);
129 static int tohex (int nib);
131 static void remote_detach (char *args, int from_tty);
132 static void remote_async_detach (char *args, int from_tty);
134 static void remote_interrupt (int signo);
136 static void remote_interrupt_twice (int signo);
138 static void interrupt_query (void);
140 static void set_thread (int, int);
142 static int remote_thread_alive (ptid_t);
144 static void get_offsets (void);
146 static long read_frame (char *buf, long sizeof_buf);
148 static int remote_insert_breakpoint (CORE_ADDR, char *);
150 static int remote_remove_breakpoint (CORE_ADDR, char *);
152 static int hexnumlen (ULONGEST num);
154 static void init_remote_ops (void);
156 static void init_extended_remote_ops (void);
158 static void init_remote_cisco_ops (void);
160 static struct target_ops remote_cisco_ops;
162 static void remote_stop (void);
164 static int ishex (int ch, int *val);
166 static int stubhex (int ch);
168 static int remote_query (int /*char */ , char *, char *, int *);
170 static int hexnumstr (char *, ULONGEST);
172 static int hexnumnstr (char *, ULONGEST, int);
174 static CORE_ADDR remote_address_masked (CORE_ADDR);
176 static void print_packet (char *);
178 static unsigned long crc32 (unsigned char *, int, unsigned int);
180 static void compare_sections_command (char *, int);
182 static void packet_command (char *, int);
184 static int stub_unpack_int (char *buff, int fieldlength);
186 static ptid_t remote_current_thread (ptid_t oldptid);
188 static void remote_find_new_threads (void);
190 static void record_currthread (int currthread);
192 static int fromhex (int a);
194 static int hex2bin (const char *hex, char *bin, int count);
196 static int bin2hex (const char *bin, char *hex, int count);
198 static int putpkt_binary (char *buf, int cnt);
200 static void check_binary_download (CORE_ADDR addr);
202 struct packet_config;
204 static void show_packet_config_cmd (struct packet_config *config);
206 static void update_packet_config (struct packet_config *config);
208 /* Define the target subroutine names */
210 void open_remote_target (char *, int, struct target_ops *, int);
212 void _initialize_remote (void);
214 /* Description of the remote protocol. Strictly speeking, when the
215 target is open()ed, remote.c should create a per-target description
216 of the remote protocol using that target's architecture.
217 Unfortunatly, the target stack doesn't include local state. For
218 the moment keep the information in the target's architecture
223 long offset; /* Offset into G packet. */
224 long regnum; /* GDB's internal register number. */
225 LONGEST pnum; /* Remote protocol register number. */
226 int in_g_packet; /* Always part of G packet. */
227 /* long size in bytes; == REGISTER_RAW_SIZE (regnum); at present. */
228 /* char *name; == REGISTER_NAME (regnum); at present. */
233 /* Description of the remote protocol registers. */
234 long sizeof_g_packet;
236 /* Description of the remote protocol registers indexed by REGNUM
237 (making an array of NUM_REGS + NUM_PSEUDO_REGS in size). */
238 struct packet_reg *regs;
240 /* This is the size (in chars) of the first response to the ``g''
241 packet. It is used as a heuristic when determining the maximum
242 size of memory-read and memory-write packets. A target will
243 typically only reserve a buffer large enough to hold the ``g''
244 packet. The size does not include packet overhead (headers and
246 long actual_register_packet_size;
248 /* This is the maximum size (in chars) of a non read/write packet.
249 It is also used as a cap on the size of read/write packets. */
250 long remote_packet_size;
253 /* Handle for retreving the remote protocol data from gdbarch. */
254 static struct gdbarch_data *remote_gdbarch_data_handle;
256 static struct remote_state *
259 return gdbarch_data (remote_gdbarch_data_handle);
263 init_remote_state (struct gdbarch *gdbarch)
266 struct remote_state *rs = xmalloc (sizeof (struct remote_state));
268 /* Start out by having the remote protocol mimic the existing
269 behavour - just copy in the description of the register cache. */
270 rs->sizeof_g_packet = REGISTER_BYTES; /* OK use. */
272 /* Assume a 1:1 regnum<->pnum table. */
273 rs->regs = xcalloc (NUM_REGS + NUM_PSEUDO_REGS, sizeof (struct packet_reg));
274 for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++)
276 struct packet_reg *r = &rs->regs[regnum];
279 r->offset = REGISTER_BYTE (regnum);
280 r->in_g_packet = (regnum < NUM_REGS);
281 /* ...size = REGISTER_RAW_SIZE (regnum); */
282 /* ...name = REGISTER_NAME (regnum); */
285 /* Default maximum number of characters in a packet body. Many
286 remote stubs have a hardwired buffer size of 400 bytes
287 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
288 as the maximum packet-size to ensure that the packet and an extra
289 NUL character can always fit in the buffer. This stops GDB
290 trashing stubs that try to squeeze an extra NUL into what is
291 already a full buffer (As of 1999-12-04 that was most stubs. */
292 rs->remote_packet_size = 400 - 1;
294 /* Should rs->sizeof_g_packet needs more space than the
295 default, adjust the size accordingly. Remember that each byte is
296 encoded as two characters. 32 is the overhead for the packet
297 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
298 (``$NN:G...#NN'') is a better guess, the below has been padded a
300 if (rs->sizeof_g_packet > ((rs->remote_packet_size - 32) / 2))
301 rs->remote_packet_size = (rs->sizeof_g_packet * 2 + 32);
303 /* This one is filled in when a ``g'' packet is received. */
304 rs->actual_register_packet_size = 0;
310 free_remote_state (struct gdbarch *gdbarch, void *pointer)
312 struct remote_state *data = pointer;
317 static struct packet_reg *
318 packet_reg_from_regnum (struct remote_state *rs, long regnum)
320 if (regnum < 0 && regnum >= NUM_REGS + NUM_PSEUDO_REGS)
324 struct packet_reg *r = &rs->regs[regnum];
325 gdb_assert (r->regnum == regnum);
330 static struct packet_reg *
331 packet_reg_from_pnum (struct remote_state *rs, LONGEST pnum)
334 for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++)
336 struct packet_reg *r = &rs->regs[i];
345 static struct target_ops remote_ops;
347 static struct target_ops extended_remote_ops;
349 /* Temporary target ops. Just like the remote_ops and
350 extended_remote_ops, but with asynchronous support. */
351 static struct target_ops remote_async_ops;
353 static struct target_ops extended_async_remote_ops;
355 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
356 ``forever'' still use the normal timeout mechanism. This is
357 currently used by the ASYNC code to guarentee that target reads
358 during the initial connect always time-out. Once getpkt has been
359 modified to return a timeout indication and, in turn
360 remote_wait()/wait_for_inferior() have gained a timeout parameter
362 static int wait_forever_enabled_p = 1;
365 /* This variable chooses whether to send a ^C or a break when the user
366 requests program interruption. Although ^C is usually what remote
367 systems expect, and that is the default here, sometimes a break is
368 preferable instead. */
370 static int remote_break;
372 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
373 remote_open knows that we don't have a file open when the program
375 static struct serial *remote_desc = NULL;
377 /* This is set by the target (thru the 'S' message)
378 to denote that the target is in kernel mode. */
379 static int cisco_kernel_mode = 0;
381 /* This variable sets the number of bits in an address that are to be
382 sent in a memory ("M" or "m") packet. Normally, after stripping
383 leading zeros, the entire address would be sent. This variable
384 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
385 initial implementation of remote.c restricted the address sent in
386 memory packets to ``host::sizeof long'' bytes - (typically 32
387 bits). Consequently, for 64 bit targets, the upper 32 bits of an
388 address was never sent. Since fixing this bug may cause a break in
389 some remote targets this variable is principly provided to
390 facilitate backward compatibility. */
392 static int remote_address_size;
394 /* Tempoary to track who currently owns the terminal. See
395 target_async_terminal_* for more details. */
397 static int remote_async_terminal_ours_p;
400 /* User configurable variables for the number of characters in a
401 memory read/write packet. MIN ((rs->remote_packet_size),
402 rs->sizeof_g_packet) is the default. Some targets need smaller
403 values (fifo overruns, et.al.) and some users need larger values
404 (speed up transfers). The variables ``preferred_*'' (the user
405 request), ``current_*'' (what was actually set) and ``forced_*''
406 (Positive - a soft limit, negative - a hard limit). */
408 struct memory_packet_config
415 /* Compute the current size of a read/write packet. Since this makes
416 use of ``actual_register_packet_size'' the computation is dynamic. */
419 get_memory_packet_size (struct memory_packet_config *config)
421 struct remote_state *rs = get_remote_state ();
422 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
423 law?) that some hosts don't cope very well with large alloca()
424 calls. Eventually the alloca() code will be replaced by calls to
425 xmalloc() and make_cleanups() allowing this restriction to either
426 be lifted or removed. */
427 #ifndef MAX_REMOTE_PACKET_SIZE
428 #define MAX_REMOTE_PACKET_SIZE 16384
430 /* NOTE: 16 is just chosen at random. */
431 #ifndef MIN_REMOTE_PACKET_SIZE
432 #define MIN_REMOTE_PACKET_SIZE 16
437 if (config->size <= 0)
438 what_they_get = MAX_REMOTE_PACKET_SIZE;
440 what_they_get = config->size;
444 what_they_get = (rs->remote_packet_size);
445 /* Limit the packet to the size specified by the user. */
447 && what_they_get > config->size)
448 what_they_get = config->size;
449 /* Limit it to the size of the targets ``g'' response. */
450 if ((rs->actual_register_packet_size) > 0
451 && what_they_get > (rs->actual_register_packet_size))
452 what_they_get = (rs->actual_register_packet_size);
454 if (what_they_get > MAX_REMOTE_PACKET_SIZE)
455 what_they_get = MAX_REMOTE_PACKET_SIZE;
456 if (what_they_get < MIN_REMOTE_PACKET_SIZE)
457 what_they_get = MIN_REMOTE_PACKET_SIZE;
458 return what_they_get;
461 /* Update the size of a read/write packet. If they user wants
462 something really big then do a sanity check. */
465 set_memory_packet_size (char *args, struct memory_packet_config *config)
467 int fixed_p = config->fixed_p;
468 long size = config->size;
470 error ("Argument required (integer, `fixed' or `limited').");
471 else if (strcmp (args, "hard") == 0
472 || strcmp (args, "fixed") == 0)
474 else if (strcmp (args, "soft") == 0
475 || strcmp (args, "limit") == 0)
480 size = strtoul (args, &end, 0);
482 error ("Invalid %s (bad syntax).", config->name);
484 /* Instead of explicitly capping the size of a packet to
485 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
486 instead allowed to set the size to something arbitrarily
488 if (size > MAX_REMOTE_PACKET_SIZE)
489 error ("Invalid %s (too large).", config->name);
493 if (fixed_p && !config->fixed_p)
495 if (! query ("The target may not be able to correctly handle a %s\n"
496 "of %ld bytes. Change the packet size? ",
498 error ("Packet size not changed.");
500 /* Update the config. */
501 config->fixed_p = fixed_p;
506 show_memory_packet_size (struct memory_packet_config *config)
508 printf_filtered ("The %s is %ld. ", config->name, config->size);
510 printf_filtered ("Packets are fixed at %ld bytes.\n",
511 get_memory_packet_size (config));
513 printf_filtered ("Packets are limited to %ld bytes.\n",
514 get_memory_packet_size (config));
517 static struct memory_packet_config memory_write_packet_config =
519 "memory-write-packet-size",
523 set_memory_write_packet_size (char *args, int from_tty)
525 set_memory_packet_size (args, &memory_write_packet_config);
529 show_memory_write_packet_size (char *args, int from_tty)
531 show_memory_packet_size (&memory_write_packet_config);
535 get_memory_write_packet_size (void)
537 return get_memory_packet_size (&memory_write_packet_config);
540 static struct memory_packet_config memory_read_packet_config =
542 "memory-read-packet-size",
546 set_memory_read_packet_size (char *args, int from_tty)
548 set_memory_packet_size (args, &memory_read_packet_config);
552 show_memory_read_packet_size (char *args, int from_tty)
554 show_memory_packet_size (&memory_read_packet_config);
558 get_memory_read_packet_size (void)
560 struct remote_state *rs = get_remote_state ();
561 long size = get_memory_packet_size (&memory_read_packet_config);
562 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
563 extra buffer size argument before the memory read size can be
564 increased beyond (rs->remote_packet_size). */
565 if (size > (rs->remote_packet_size))
566 size = (rs->remote_packet_size);
571 /* Generic configuration support for packets the stub optionally
572 supports. Allows the user to specify the use of the packet as well
573 as allowing GDB to auto-detect support in the remote stub. */
577 PACKET_SUPPORT_UNKNOWN = 0,
586 enum cmd_auto_boolean detect;
587 enum packet_support support;
590 /* Analyze a packet's return value and update the packet config
601 update_packet_config (struct packet_config *config)
603 switch (config->detect)
605 case CMD_AUTO_BOOLEAN_TRUE:
606 config->support = PACKET_ENABLE;
608 case CMD_AUTO_BOOLEAN_FALSE:
609 config->support = PACKET_DISABLE;
611 case CMD_AUTO_BOOLEAN_AUTO:
612 config->support = PACKET_SUPPORT_UNKNOWN;
618 show_packet_config_cmd (struct packet_config *config)
620 char *support = "internal-error";
621 switch (config->support)
627 support = "disabled";
629 case PACKET_SUPPORT_UNKNOWN:
633 switch (config->detect)
635 case CMD_AUTO_BOOLEAN_AUTO:
636 printf_filtered ("Support for remote protocol `%s' (%s) packet is auto-detected, currently %s.\n",
637 config->name, config->title, support);
639 case CMD_AUTO_BOOLEAN_TRUE:
640 case CMD_AUTO_BOOLEAN_FALSE:
641 printf_filtered ("Support for remote protocol `%s' (%s) packet is currently %s.\n",
642 config->name, config->title, support);
648 add_packet_config_cmd (struct packet_config *config,
651 void (*set_func) (char *args, int from_tty,
652 struct cmd_list_element *
654 void (*show_func) (char *name,
656 struct cmd_list_element **set_remote_list,
657 struct cmd_list_element **show_remote_list,
660 struct cmd_list_element *set_cmd;
661 struct cmd_list_element *show_cmd;
666 config->title = title;
667 config->detect = CMD_AUTO_BOOLEAN_AUTO;
668 config->support = PACKET_SUPPORT_UNKNOWN;
669 xasprintf (&set_doc, "Set use of remote protocol `%s' (%s) packet",
671 xasprintf (&show_doc, "Show current use of remote protocol `%s' (%s) packet",
673 /* set/show TITLE-packet {auto,on,off} */
674 xasprintf (&cmd_name, "%s-packet", title);
675 set_cmd = add_set_auto_boolean_cmd (cmd_name, class_obscure,
676 &config->detect, set_doc,
678 set_cmd->function.sfunc = set_func;
679 show_cmd = add_cmd (cmd_name, class_obscure, show_func, show_doc,
681 /* set/show remote NAME-packet {auto,on,off} -- legacy */
685 xasprintf (&legacy_name, "%s-packet", name);
686 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
688 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
693 static enum packet_result
694 packet_ok (const char *buf, struct packet_config *config)
698 /* The stub recognized the packet request. Check that the
699 operation succeeded. */
700 switch (config->support)
702 case PACKET_SUPPORT_UNKNOWN:
704 fprintf_unfiltered (gdb_stdlog,
705 "Packet %s (%s) is supported\n",
706 config->name, config->title);
707 config->support = PACKET_ENABLE;
710 internal_error (__FILE__, __LINE__,
711 "packet_ok: attempt to use a disabled packet");
716 if (buf[0] == 'O' && buf[1] == 'K' && buf[2] == '\0')
717 /* "OK" - definitly OK. */
720 && isxdigit (buf[1]) && isxdigit (buf[2])
722 /* "Enn" - definitly an error. */
724 /* The packet may or may not be OK. Just assume it is */
729 /* The stub does not support the packet. */
730 switch (config->support)
733 if (config->detect == CMD_AUTO_BOOLEAN_AUTO)
734 /* If the stub previously indicated that the packet was
735 supported then there is a protocol error.. */
736 error ("Protocol error: %s (%s) conflicting enabled responses.",
737 config->name, config->title);
739 /* The user set it wrong. */
740 error ("Enabled packet %s (%s) not recognized by stub",
741 config->name, config->title);
743 case PACKET_SUPPORT_UNKNOWN:
745 fprintf_unfiltered (gdb_stdlog,
746 "Packet %s (%s) is NOT supported\n",
747 config->name, config->title);
748 config->support = PACKET_DISABLE;
753 return PACKET_UNKNOWN;
757 /* Should we try the 'qSymbol' (target symbol lookup service) request? */
758 static struct packet_config remote_protocol_qSymbol;
761 set_remote_protocol_qSymbol_packet_cmd (char *args, int from_tty,
762 struct cmd_list_element *c)
764 update_packet_config (&remote_protocol_qSymbol);
768 show_remote_protocol_qSymbol_packet_cmd (char *args, int from_tty)
770 show_packet_config_cmd (&remote_protocol_qSymbol);
773 /* Should we try the 'e' (step over range) request? */
774 static struct packet_config remote_protocol_e;
777 set_remote_protocol_e_packet_cmd (char *args, int from_tty,
778 struct cmd_list_element *c)
780 update_packet_config (&remote_protocol_e);
784 show_remote_protocol_e_packet_cmd (char *args, int from_tty)
786 show_packet_config_cmd (&remote_protocol_e);
790 /* Should we try the 'E' (step over range / w signal #) request? */
791 static struct packet_config remote_protocol_E;
794 set_remote_protocol_E_packet_cmd (char *args, int from_tty,
795 struct cmd_list_element *c)
797 update_packet_config (&remote_protocol_E);
801 show_remote_protocol_E_packet_cmd (char *args, int from_tty)
803 show_packet_config_cmd (&remote_protocol_E);
807 /* Should we try the 'P' (set register) request? */
809 static struct packet_config remote_protocol_P;
812 set_remote_protocol_P_packet_cmd (char *args, int from_tty,
813 struct cmd_list_element *c)
815 update_packet_config (&remote_protocol_P);
819 show_remote_protocol_P_packet_cmd (char *args, int from_tty)
821 show_packet_config_cmd (&remote_protocol_P);
824 /* Should we try one of the 'Z' requests? */
828 Z_PACKET_SOFTWARE_BP,
829 Z_PACKET_HARDWARE_BP,
836 static struct packet_config remote_protocol_Z[NR_Z_PACKET_TYPES];
838 /* FIXME: Instead of having all these boiler plate functions, the
839 command callback should include a context argument. */
842 set_remote_protocol_Z_software_bp_packet_cmd (char *args, int from_tty,
843 struct cmd_list_element *c)
845 update_packet_config (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP]);
849 show_remote_protocol_Z_software_bp_packet_cmd (char *args, int from_tty)
851 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP]);
855 set_remote_protocol_Z_hardware_bp_packet_cmd (char *args, int from_tty,
856 struct cmd_list_element *c)
858 update_packet_config (&remote_protocol_Z[Z_PACKET_HARDWARE_BP]);
862 show_remote_protocol_Z_hardware_bp_packet_cmd (char *args, int from_tty)
864 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_HARDWARE_BP]);
868 set_remote_protocol_Z_write_wp_packet_cmd (char *args, int from_tty,
869 struct cmd_list_element *c)
871 update_packet_config (&remote_protocol_Z[Z_PACKET_WRITE_WP]);
875 show_remote_protocol_Z_write_wp_packet_cmd (char *args, int from_tty)
877 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_WRITE_WP]);
881 set_remote_protocol_Z_read_wp_packet_cmd (char *args, int from_tty,
882 struct cmd_list_element *c)
884 update_packet_config (&remote_protocol_Z[Z_PACKET_READ_WP]);
888 show_remote_protocol_Z_read_wp_packet_cmd (char *args, int from_tty)
890 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_READ_WP]);
894 set_remote_protocol_Z_access_wp_packet_cmd (char *args, int from_tty,
895 struct cmd_list_element *c)
897 update_packet_config (&remote_protocol_Z[Z_PACKET_ACCESS_WP]);
901 show_remote_protocol_Z_access_wp_packet_cmd (char *args, int from_tty)
903 show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_ACCESS_WP]);
906 /* For compatibility with older distributions. Provide a ``set remote
907 Z-packet ...'' command that updates all the Z packet types. */
909 static enum cmd_auto_boolean remote_Z_packet_detect;
912 set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
913 struct cmd_list_element *c)
916 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
918 remote_protocol_Z[i].detect = remote_Z_packet_detect;
919 update_packet_config (&remote_protocol_Z[i]);
924 show_remote_protocol_Z_packet_cmd (char *args, int from_tty)
927 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
929 show_packet_config_cmd (&remote_protocol_Z[i]);
933 /* Should we try the 'X' (remote binary download) packet?
935 This variable (available to the user via "set remote X-packet")
936 dictates whether downloads are sent in binary (via the 'X' packet).
937 We assume that the stub can, and attempt to do it. This will be
938 cleared if the stub does not understand it. This switch is still
939 needed, though in cases when the packet is supported in the stub,
940 but the connection does not allow it (i.e., 7-bit serial connection
943 static struct packet_config remote_protocol_binary_download;
945 /* Should we try the 'ThreadInfo' query packet?
947 This variable (NOT available to the user: auto-detect only!)
948 determines whether GDB will use the new, simpler "ThreadInfo"
949 query or the older, more complex syntax for thread queries.
950 This is an auto-detect variable (set to true at each connect,
951 and set to false when the target fails to recognize it). */
953 static int use_threadinfo_query;
954 static int use_threadextra_query;
957 set_remote_protocol_binary_download_cmd (char *args,
959 struct cmd_list_element *c)
961 update_packet_config (&remote_protocol_binary_download);
965 show_remote_protocol_binary_download_cmd (char *args,
968 show_packet_config_cmd (&remote_protocol_binary_download);
972 /* Tokens for use by the asynchronous signal handlers for SIGINT */
973 PTR sigint_remote_twice_token;
974 PTR sigint_remote_token;
976 /* These are pointers to hook functions that may be set in order to
977 modify resume/wait behavior for a particular architecture. */
979 void (*target_resume_hook) (void);
980 void (*target_wait_loop_hook) (void);
984 /* These are the threads which we last sent to the remote system.
985 -1 for all or -2 for not sent yet. */
986 static int general_thread;
987 static int continue_thread;
989 /* Call this function as a result of
990 1) A halt indication (T packet) containing a thread id
991 2) A direct query of currthread
992 3) Successful execution of set thread
996 record_currthread (int currthread)
998 general_thread = currthread;
1000 /* If this is a new thread, add it to GDB's thread list.
1001 If we leave it up to WFI to do this, bad things will happen. */
1002 if (!in_thread_list (pid_to_ptid (currthread)))
1004 add_thread (pid_to_ptid (currthread));
1005 ui_out_text (uiout, "[New ");
1006 ui_out_text (uiout, target_pid_to_str (pid_to_ptid (currthread)));
1007 ui_out_text (uiout, "]\n");
1011 #define MAGIC_NULL_PID 42000
1014 set_thread (int th, int gen)
1016 struct remote_state *rs = get_remote_state ();
1017 char *buf = alloca (rs->remote_packet_size);
1018 int state = gen ? general_thread : continue_thread;
1024 buf[1] = gen ? 'g' : 'c';
1025 if (th == MAGIC_NULL_PID)
1031 sprintf (&buf[2], "-%x", -th);
1033 sprintf (&buf[2], "%x", th);
1035 getpkt (buf, (rs->remote_packet_size), 0);
1037 general_thread = th;
1039 continue_thread = th;
1042 /* Return nonzero if the thread TH is still alive on the remote system. */
1045 remote_thread_alive (ptid_t ptid)
1047 int tid = PIDGET (ptid);
1051 sprintf (buf, "T-%08x", -tid);
1053 sprintf (buf, "T%08x", tid);
1055 getpkt (buf, sizeof (buf), 0);
1056 return (buf[0] == 'O' && buf[1] == 'K');
1059 /* About these extended threadlist and threadinfo packets. They are
1060 variable length packets but, the fields within them are often fixed
1061 length. They are redundent enough to send over UDP as is the
1062 remote protocol in general. There is a matching unit test module
1065 #define OPAQUETHREADBYTES 8
1067 /* a 64 bit opaque identifier */
1068 typedef unsigned char threadref[OPAQUETHREADBYTES];
1070 /* WARNING: This threadref data structure comes from the remote O.S., libstub
1071 protocol encoding, and remote.c. it is not particularly changable */
1073 /* Right now, the internal structure is int. We want it to be bigger.
1077 typedef int gdb_threadref; /* internal GDB thread reference */
1079 /* gdb_ext_thread_info is an internal GDB data structure which is
1080 equivalint to the reply of the remote threadinfo packet */
1082 struct gdb_ext_thread_info
1084 threadref threadid; /* External form of thread reference */
1085 int active; /* Has state interesting to GDB? , regs, stack */
1086 char display[256]; /* Brief state display, name, blocked/syspended */
1087 char shortname[32]; /* To be used to name threads */
1088 char more_display[256]; /* Long info, statistics, queue depth, whatever */
1091 /* The volume of remote transfers can be limited by submitting
1092 a mask containing bits specifying the desired information.
1093 Use a union of these values as the 'selection' parameter to
1094 get_thread_info. FIXME: Make these TAG names more thread specific.
1097 #define TAG_THREADID 1
1098 #define TAG_EXISTS 2
1099 #define TAG_DISPLAY 4
1100 #define TAG_THREADNAME 8
1101 #define TAG_MOREDISPLAY 16
1103 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES*2)
1105 char *unpack_varlen_hex (char *buff, int *result);
1107 static char *unpack_nibble (char *buf, int *val);
1109 static char *pack_nibble (char *buf, int nibble);
1111 static char *pack_hex_byte (char *pkt, int /*unsigned char */ byte);
1113 static char *unpack_byte (char *buf, int *value);
1115 static char *pack_int (char *buf, int value);
1117 static char *unpack_int (char *buf, int *value);
1119 static char *unpack_string (char *src, char *dest, int length);
1121 static char *pack_threadid (char *pkt, threadref * id);
1123 static char *unpack_threadid (char *inbuf, threadref * id);
1125 void int_to_threadref (threadref * id, int value);
1127 static int threadref_to_int (threadref * ref);
1129 static void copy_threadref (threadref * dest, threadref * src);
1131 static int threadmatch (threadref * dest, threadref * src);
1133 static char *pack_threadinfo_request (char *pkt, int mode, threadref * id);
1135 static int remote_unpack_thread_info_response (char *pkt,
1136 threadref * expectedref,
1137 struct gdb_ext_thread_info
1141 static int remote_get_threadinfo (threadref * threadid, int fieldset, /*TAG mask */
1142 struct gdb_ext_thread_info *info);
1144 static int adapt_remote_get_threadinfo (gdb_threadref * ref,
1146 struct gdb_ext_thread_info *info);
1148 static char *pack_threadlist_request (char *pkt, int startflag,
1150 threadref * nextthread);
1152 static int parse_threadlist_response (char *pkt,
1154 threadref * original_echo,
1155 threadref * resultlist, int *doneflag);
1157 static int remote_get_threadlist (int startflag,
1158 threadref * nextthread,
1161 int *result_count, threadref * threadlist);
1163 typedef int (*rmt_thread_action) (threadref * ref, void *context);
1165 static int remote_threadlist_iterator (rmt_thread_action stepfunction,
1166 void *context, int looplimit);
1168 static int remote_newthread_step (threadref * ref, void *context);
1170 /* encode 64 bits in 16 chars of hex */
1172 static const char hexchars[] = "0123456789abcdef";
1175 ishex (int ch, int *val)
1177 if ((ch >= 'a') && (ch <= 'f'))
1179 *val = ch - 'a' + 10;
1182 if ((ch >= 'A') && (ch <= 'F'))
1184 *val = ch - 'A' + 10;
1187 if ((ch >= '0') && (ch <= '9'))
1198 if (ch >= 'a' && ch <= 'f')
1199 return ch - 'a' + 10;
1200 if (ch >= '0' && ch <= '9')
1202 if (ch >= 'A' && ch <= 'F')
1203 return ch - 'A' + 10;
1208 stub_unpack_int (char *buff, int fieldlength)
1215 nibble = stubhex (*buff++);
1219 retval = retval << 4;
1225 unpack_varlen_hex (char *buff, /* packet to parse */
1231 while (ishex (*buff, &nibble))
1234 retval = retval << 4;
1235 retval |= nibble & 0x0f;
1242 unpack_nibble (char *buf, int *val)
1244 ishex (*buf++, val);
1249 pack_nibble (char *buf, int nibble)
1251 *buf++ = hexchars[(nibble & 0x0f)];
1256 pack_hex_byte (char *pkt, int byte)
1258 *pkt++ = hexchars[(byte >> 4) & 0xf];
1259 *pkt++ = hexchars[(byte & 0xf)];
1264 unpack_byte (char *buf, int *value)
1266 *value = stub_unpack_int (buf, 2);
1271 pack_int (char *buf, int value)
1273 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
1274 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
1275 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
1276 buf = pack_hex_byte (buf, (value & 0xff));
1281 unpack_int (char *buf, int *value)
1283 *value = stub_unpack_int (buf, 8);
1287 #if 0 /* currently unused, uncomment when needed */
1288 static char *pack_string (char *pkt, char *string);
1291 pack_string (char *pkt, char *string)
1296 len = strlen (string);
1298 len = 200; /* Bigger than most GDB packets, junk??? */
1299 pkt = pack_hex_byte (pkt, len);
1303 if ((ch == '\0') || (ch == '#'))
1304 ch = '*'; /* Protect encapsulation */
1309 #endif /* 0 (unused) */
1312 unpack_string (char *src, char *dest, int length)
1321 pack_threadid (char *pkt, threadref *id)
1324 unsigned char *altid;
1326 altid = (unsigned char *) id;
1327 limit = pkt + BUF_THREAD_ID_SIZE;
1329 pkt = pack_hex_byte (pkt, *altid++);
1335 unpack_threadid (char *inbuf, threadref *id)
1338 char *limit = inbuf + BUF_THREAD_ID_SIZE;
1341 altref = (char *) id;
1343 while (inbuf < limit)
1345 x = stubhex (*inbuf++);
1346 y = stubhex (*inbuf++);
1347 *altref++ = (x << 4) | y;
1352 /* Externally, threadrefs are 64 bits but internally, they are still
1353 ints. This is due to a mismatch of specifications. We would like
1354 to use 64bit thread references internally. This is an adapter
1358 int_to_threadref (threadref *id, int value)
1360 unsigned char *scan;
1362 scan = (unsigned char *) id;
1368 *scan++ = (value >> 24) & 0xff;
1369 *scan++ = (value >> 16) & 0xff;
1370 *scan++ = (value >> 8) & 0xff;
1371 *scan++ = (value & 0xff);
1375 threadref_to_int (threadref *ref)
1378 unsigned char *scan;
1380 scan = (char *) ref;
1384 value = (value << 8) | ((*scan++) & 0xff);
1389 copy_threadref (threadref *dest, threadref *src)
1392 unsigned char *csrc, *cdest;
1394 csrc = (unsigned char *) src;
1395 cdest = (unsigned char *) dest;
1402 threadmatch (threadref *dest, threadref *src)
1404 /* things are broken right now, so just assume we got a match */
1406 unsigned char *srcp, *destp;
1408 srcp = (char *) src;
1409 destp = (char *) dest;
1413 result &= (*srcp++ == *destp++) ? 1 : 0;
1420 threadid:1, # always request threadid
1427 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1430 pack_threadinfo_request (char *pkt, int mode, threadref *id)
1432 *pkt++ = 'q'; /* Info Query */
1433 *pkt++ = 'P'; /* process or thread info */
1434 pkt = pack_int (pkt, mode); /* mode */
1435 pkt = pack_threadid (pkt, id); /* threadid */
1436 *pkt = '\0'; /* terminate */
1440 /* These values tag the fields in a thread info response packet */
1441 /* Tagging the fields allows us to request specific fields and to
1442 add more fields as time goes by */
1444 #define TAG_THREADID 1 /* Echo the thread identifier */
1445 #define TAG_EXISTS 2 /* Is this process defined enough to
1446 fetch registers and its stack */
1447 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1448 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is */
1449 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1453 remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
1454 struct gdb_ext_thread_info *info)
1456 struct remote_state *rs = get_remote_state ();
1460 char *limit = pkt + (rs->remote_packet_size); /* plausable parsing limit */
1463 /* info->threadid = 0; FIXME: implement zero_threadref */
1465 info->display[0] = '\0';
1466 info->shortname[0] = '\0';
1467 info->more_display[0] = '\0';
1469 /* Assume the characters indicating the packet type have been stripped */
1470 pkt = unpack_int (pkt, &mask); /* arg mask */
1471 pkt = unpack_threadid (pkt, &ref);
1474 warning ("Incomplete response to threadinfo request\n");
1475 if (!threadmatch (&ref, expectedref))
1476 { /* This is an answer to a different request */
1477 warning ("ERROR RMT Thread info mismatch\n");
1480 copy_threadref (&info->threadid, &ref);
1482 /* Loop on tagged fields , try to bail if somthing goes wrong */
1484 while ((pkt < limit) && mask && *pkt) /* packets are terminated with nulls */
1486 pkt = unpack_int (pkt, &tag); /* tag */
1487 pkt = unpack_byte (pkt, &length); /* length */
1488 if (!(tag & mask)) /* tags out of synch with mask */
1490 warning ("ERROR RMT: threadinfo tag mismatch\n");
1494 if (tag == TAG_THREADID)
1498 warning ("ERROR RMT: length of threadid is not 16\n");
1502 pkt = unpack_threadid (pkt, &ref);
1503 mask = mask & ~TAG_THREADID;
1506 if (tag == TAG_EXISTS)
1508 info->active = stub_unpack_int (pkt, length);
1510 mask = mask & ~(TAG_EXISTS);
1513 warning ("ERROR RMT: 'exists' length too long\n");
1519 if (tag == TAG_THREADNAME)
1521 pkt = unpack_string (pkt, &info->shortname[0], length);
1522 mask = mask & ~TAG_THREADNAME;
1525 if (tag == TAG_DISPLAY)
1527 pkt = unpack_string (pkt, &info->display[0], length);
1528 mask = mask & ~TAG_DISPLAY;
1531 if (tag == TAG_MOREDISPLAY)
1533 pkt = unpack_string (pkt, &info->more_display[0], length);
1534 mask = mask & ~TAG_MOREDISPLAY;
1537 warning ("ERROR RMT: unknown thread info tag\n");
1538 break; /* Not a tag we know about */
1544 remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
1545 struct gdb_ext_thread_info *info)
1547 struct remote_state *rs = get_remote_state ();
1549 char *threadinfo_pkt = alloca (rs->remote_packet_size);
1551 pack_threadinfo_request (threadinfo_pkt, fieldset, threadid);
1552 putpkt (threadinfo_pkt);
1553 getpkt (threadinfo_pkt, (rs->remote_packet_size), 0);
1554 result = remote_unpack_thread_info_response (threadinfo_pkt + 2, threadid,
1559 /* Unfortunately, 61 bit thread-ids are bigger than the internal
1560 representation of a threadid. */
1563 adapt_remote_get_threadinfo (gdb_threadref *ref, int selection,
1564 struct gdb_ext_thread_info *info)
1568 int_to_threadref (&lclref, *ref);
1569 return remote_get_threadinfo (&lclref, selection, info);
1572 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1575 pack_threadlist_request (char *pkt, int startflag, int threadcount,
1576 threadref *nextthread)
1578 *pkt++ = 'q'; /* info query packet */
1579 *pkt++ = 'L'; /* Process LIST or threadLIST request */
1580 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
1581 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
1582 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
1587 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1590 parse_threadlist_response (char *pkt, int result_limit,
1591 threadref *original_echo, threadref *resultlist,
1594 struct remote_state *rs = get_remote_state ();
1596 int count, resultcount, done;
1599 /* Assume the 'q' and 'M chars have been stripped. */
1600 limit = pkt + ((rs->remote_packet_size) - BUF_THREAD_ID_SIZE); /* done parse past here */
1601 pkt = unpack_byte (pkt, &count); /* count field */
1602 pkt = unpack_nibble (pkt, &done);
1603 /* The first threadid is the argument threadid. */
1604 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
1605 while ((count-- > 0) && (pkt < limit))
1607 pkt = unpack_threadid (pkt, resultlist++);
1608 if (resultcount++ >= result_limit)
1617 remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
1618 int *done, int *result_count, threadref *threadlist)
1620 struct remote_state *rs = get_remote_state ();
1621 static threadref echo_nextthread;
1622 char *threadlist_packet = alloca (rs->remote_packet_size);
1623 char *t_response = alloca (rs->remote_packet_size);
1626 /* Trancate result limit to be smaller than the packet size */
1627 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= (rs->remote_packet_size))
1628 result_limit = ((rs->remote_packet_size) / BUF_THREAD_ID_SIZE) - 2;
1630 pack_threadlist_request (threadlist_packet,
1631 startflag, result_limit, nextthread);
1632 putpkt (threadlist_packet);
1633 getpkt (t_response, (rs->remote_packet_size), 0);
1636 parse_threadlist_response (t_response + 2, result_limit, &echo_nextthread,
1639 if (!threadmatch (&echo_nextthread, nextthread))
1641 /* FIXME: This is a good reason to drop the packet */
1642 /* Possably, there is a duplicate response */
1644 retransmit immediatly - race conditions
1645 retransmit after timeout - yes
1647 wait for packet, then exit
1649 warning ("HMM: threadlist did not echo arg thread, dropping it\n");
1650 return 0; /* I choose simply exiting */
1652 if (*result_count <= 0)
1656 warning ("RMT ERROR : failed to get remote thread list\n");
1659 return result; /* break; */
1661 if (*result_count > result_limit)
1664 warning ("RMT ERROR: threadlist response longer than requested\n");
1670 /* This is the interface between remote and threads, remotes upper interface */
1672 /* remote_find_new_threads retrieves the thread list and for each
1673 thread in the list, looks up the thread in GDB's internal list,
1674 ading the thread if it does not already exist. This involves
1675 getting partial thread lists from the remote target so, polling the
1676 quit_flag is required. */
1679 /* About this many threadisds fit in a packet. */
1681 #define MAXTHREADLISTRESULTS 32
1684 remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
1687 int done, i, result_count;
1691 static threadref nextthread;
1692 static threadref resultthreadlist[MAXTHREADLISTRESULTS];
1697 if (loopcount++ > looplimit)
1700 warning ("Remote fetch threadlist -infinite loop-\n");
1703 if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS,
1704 &done, &result_count, resultthreadlist))
1709 /* clear for later iterations */
1711 /* Setup to resume next batch of thread references, set nextthread. */
1712 if (result_count >= 1)
1713 copy_threadref (&nextthread, &resultthreadlist[result_count - 1]);
1715 while (result_count--)
1716 if (!(result = (*stepfunction) (&resultthreadlist[i++], context)))
1723 remote_newthread_step (threadref *ref, void *context)
1727 ptid = pid_to_ptid (threadref_to_int (ref));
1729 if (!in_thread_list (ptid))
1731 return 1; /* continue iterator */
1734 #define CRAZY_MAX_THREADS 1000
1737 remote_current_thread (ptid_t oldpid)
1739 struct remote_state *rs = get_remote_state ();
1740 char *buf = alloca (rs->remote_packet_size);
1743 getpkt (buf, (rs->remote_packet_size), 0);
1744 if (buf[0] == 'Q' && buf[1] == 'C')
1745 return pid_to_ptid (strtol (&buf[2], NULL, 16));
1750 /* Find new threads for info threads command.
1751 * Original version, using John Metzler's thread protocol.
1755 remote_find_new_threads (void)
1757 remote_threadlist_iterator (remote_newthread_step, 0,
1759 if (PIDGET (inferior_ptid) == MAGIC_NULL_PID) /* ack ack ack */
1760 inferior_ptid = remote_current_thread (inferior_ptid);
1764 * Find all threads for info threads command.
1765 * Uses new thread protocol contributed by Cisco.
1766 * Falls back and attempts to use the older method (above)
1767 * if the target doesn't respond to the new method.
1771 remote_threads_info (void)
1773 struct remote_state *rs = get_remote_state ();
1774 char *buf = alloca (rs->remote_packet_size);
1778 if (remote_desc == 0) /* paranoia */
1779 error ("Command can only be used when connected to the remote target.");
1781 if (use_threadinfo_query)
1783 putpkt ("qfThreadInfo");
1785 getpkt (bufp, (rs->remote_packet_size), 0);
1786 if (bufp[0] != '\0') /* q packet recognized */
1788 while (*bufp++ == 'm') /* reply contains one or more TID */
1792 tid = strtol (bufp, &bufp, 16);
1793 if (tid != 0 && !in_thread_list (pid_to_ptid (tid)))
1794 add_thread (pid_to_ptid (tid));
1796 while (*bufp++ == ','); /* comma-separated list */
1797 putpkt ("qsThreadInfo");
1799 getpkt (bufp, (rs->remote_packet_size), 0);
1805 /* Else fall back to old method based on jmetzler protocol. */
1806 use_threadinfo_query = 0;
1807 remote_find_new_threads ();
1812 * Collect a descriptive string about the given thread.
1813 * The target may say anything it wants to about the thread
1814 * (typically info about its blocked / runnable state, name, etc.).
1815 * This string will appear in the info threads display.
1817 * Optional: targets are not required to implement this function.
1821 remote_threads_extra_info (struct thread_info *tp)
1823 struct remote_state *rs = get_remote_state ();
1827 struct gdb_ext_thread_info threadinfo;
1828 static char display_buf[100]; /* arbitrary... */
1829 char *bufp = alloca (rs->remote_packet_size);
1830 int n = 0; /* position in display_buf */
1832 if (remote_desc == 0) /* paranoia */
1833 internal_error (__FILE__, __LINE__,
1834 "remote_threads_extra_info");
1836 if (use_threadextra_query)
1838 sprintf (bufp, "qThreadExtraInfo,%x", PIDGET (tp->ptid));
1840 getpkt (bufp, (rs->remote_packet_size), 0);
1843 n = min (strlen (bufp) / 2, sizeof (display_buf));
1844 result = hex2bin (bufp, display_buf, n);
1845 display_buf [result] = '\0';
1850 /* If the above query fails, fall back to the old method. */
1851 use_threadextra_query = 0;
1852 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
1853 | TAG_MOREDISPLAY | TAG_DISPLAY;
1854 int_to_threadref (&id, PIDGET (tp->ptid));
1855 if (remote_get_threadinfo (&id, set, &threadinfo))
1856 if (threadinfo.active)
1858 if (*threadinfo.shortname)
1859 n += sprintf(&display_buf[0], " Name: %s,", threadinfo.shortname);
1860 if (*threadinfo.display)
1861 n += sprintf(&display_buf[n], " State: %s,", threadinfo.display);
1862 if (*threadinfo.more_display)
1863 n += sprintf(&display_buf[n], " Priority: %s",
1864 threadinfo.more_display);
1868 /* for purely cosmetic reasons, clear up trailing commas */
1869 if (',' == display_buf[n-1])
1870 display_buf[n-1] = ' ';
1879 /* Restart the remote side; this is an extended protocol operation. */
1882 extended_remote_restart (void)
1884 struct remote_state *rs = get_remote_state ();
1885 char *buf = alloca (rs->remote_packet_size);
1887 /* Send the restart command; for reasons I don't understand the
1888 remote side really expects a number after the "R". */
1890 sprintf (&buf[1], "%x", 0);
1893 /* Now query for status so this looks just like we restarted
1894 gdbserver from scratch. */
1896 getpkt (buf, (rs->remote_packet_size), 0);
1899 /* Clean up connection to a remote debugger. */
1903 remote_close (int quitting)
1906 serial_close (remote_desc);
1910 /* Query the remote side for the text, data and bss offsets. */
1915 struct remote_state *rs = get_remote_state ();
1916 char *buf = alloca (rs->remote_packet_size);
1919 CORE_ADDR text_addr, data_addr, bss_addr;
1920 struct section_offsets *offs;
1922 putpkt ("qOffsets");
1924 getpkt (buf, (rs->remote_packet_size), 0);
1926 if (buf[0] == '\000')
1927 return; /* Return silently. Stub doesn't support
1931 warning ("Remote failure reply: %s", buf);
1935 /* Pick up each field in turn. This used to be done with scanf, but
1936 scanf will make trouble if CORE_ADDR size doesn't match
1937 conversion directives correctly. The following code will work
1938 with any size of CORE_ADDR. */
1939 text_addr = data_addr = bss_addr = 0;
1943 if (strncmp (ptr, "Text=", 5) == 0)
1946 /* Don't use strtol, could lose on big values. */
1947 while (*ptr && *ptr != ';')
1948 text_addr = (text_addr << 4) + fromhex (*ptr++);
1953 if (!lose && strncmp (ptr, ";Data=", 6) == 0)
1956 while (*ptr && *ptr != ';')
1957 data_addr = (data_addr << 4) + fromhex (*ptr++);
1962 if (!lose && strncmp (ptr, ";Bss=", 5) == 0)
1965 while (*ptr && *ptr != ';')
1966 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
1972 error ("Malformed response to offset query, %s", buf);
1974 if (symfile_objfile == NULL)
1977 offs = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS);
1978 memcpy (offs, symfile_objfile->section_offsets, SIZEOF_SECTION_OFFSETS);
1980 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
1982 /* This is a temporary kludge to force data and bss to use the same offsets
1983 because that's what nlmconv does now. The real solution requires changes
1984 to the stub and remote.c that I don't have time to do right now. */
1986 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
1987 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
1989 objfile_relocate (symfile_objfile, offs);
1993 * Cisco version of section offsets:
1995 * Instead of having GDB query the target for the section offsets,
1996 * Cisco lets the target volunteer the information! It's also in
1997 * a different format, so here are the functions that will decode
1998 * a section offset packet from a Cisco target.
2002 * Function: remote_cisco_section_offsets
2004 * Returns: zero for success, non-zero for failure
2008 remote_cisco_section_offsets (bfd_vma text_addr,
2011 bfd_signed_vma *text_offs,
2012 bfd_signed_vma *data_offs,
2013 bfd_signed_vma *bss_offs)
2015 bfd_vma text_base, data_base, bss_base;
2016 struct minimal_symbol *start;
2021 if (symfile_objfile == NULL)
2022 return -1; /* no can do nothin' */
2024 start = lookup_minimal_symbol ("_start", NULL, NULL);
2026 return -1; /* Can't find "_start" symbol */
2028 data_base = bss_base = 0;
2029 text_base = SYMBOL_VALUE_ADDRESS (start);
2031 abfd = symfile_objfile->obfd;
2032 for (sect = abfd->sections;
2036 const char *p = bfd_get_section_name (abfd, sect);
2038 if (strcmp (p + len - 4, "data") == 0) /* ends in "data" */
2039 if (data_base == 0 ||
2040 data_base > bfd_get_section_vma (abfd, sect))
2041 data_base = bfd_get_section_vma (abfd, sect);
2042 if (strcmp (p + len - 3, "bss") == 0) /* ends in "bss" */
2043 if (bss_base == 0 ||
2044 bss_base > bfd_get_section_vma (abfd, sect))
2045 bss_base = bfd_get_section_vma (abfd, sect);
2047 *text_offs = text_addr - text_base;
2048 *data_offs = data_addr - data_base;
2049 *bss_offs = bss_addr - bss_base;
2054 sprintf (tmp, "VMA: text = 0x");
2055 sprintf_vma (tmp + strlen (tmp), text_addr);
2056 sprintf (tmp + strlen (tmp), " data = 0x");
2057 sprintf_vma (tmp + strlen (tmp), data_addr);
2058 sprintf (tmp + strlen (tmp), " bss = 0x");
2059 sprintf_vma (tmp + strlen (tmp), bss_addr);
2060 fprintf_filtered (gdb_stdlog, tmp);
2061 fprintf_filtered (gdb_stdlog,
2062 "Reloc offset: text = 0x%s data = 0x%s bss = 0x%s\n",
2063 paddr_nz (*text_offs),
2064 paddr_nz (*data_offs),
2065 paddr_nz (*bss_offs));
2072 * Function: remote_cisco_objfile_relocate
2074 * Relocate the symbol file for a remote target.
2078 remote_cisco_objfile_relocate (bfd_signed_vma text_off, bfd_signed_vma data_off,
2079 bfd_signed_vma bss_off)
2081 struct section_offsets *offs;
2083 if (text_off != 0 || data_off != 0 || bss_off != 0)
2085 /* FIXME: This code assumes gdb-stabs.h is being used; it's
2086 broken for xcoff, dwarf, sdb-coff, etc. But there is no
2087 simple canonical representation for this stuff. */
2089 offs = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS);
2090 memcpy (offs, symfile_objfile->section_offsets, SIZEOF_SECTION_OFFSETS);
2092 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_off;
2093 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_off;
2094 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = bss_off;
2096 /* First call the standard objfile_relocate. */
2097 objfile_relocate (symfile_objfile, offs);
2099 /* Now we need to fix up the section entries already attached to
2100 the exec target. These entries will control memory transfers
2101 from the exec file. */
2103 exec_set_section_offsets (text_off, data_off, bss_off);
2107 /* Stub for catch_errors. */
2110 remote_start_remote_dummy (void *dummy)
2112 start_remote (); /* Initialize gdb process mechanisms */
2117 remote_start_remote (PTR dummy)
2119 immediate_quit++; /* Allow user to interrupt it */
2121 /* Ack any packet which the remote side has already sent. */
2122 serial_write (remote_desc, "+", 1);
2124 /* Let the stub know that we want it to return the thread. */
2127 inferior_ptid = remote_current_thread (inferior_ptid);
2129 get_offsets (); /* Get text, data & bss offsets */
2131 putpkt ("?"); /* initiate a query from remote machine */
2134 return remote_start_remote_dummy (dummy);
2137 /* Open a connection to a remote debugger.
2138 NAME is the filename used for communication. */
2141 remote_open (char *name, int from_tty)
2143 remote_open_1 (name, from_tty, &remote_ops, 0);
2146 /* Just like remote_open, but with asynchronous support. */
2148 remote_async_open (char *name, int from_tty)
2150 remote_async_open_1 (name, from_tty, &remote_async_ops, 0);
2153 /* Open a connection to a remote debugger using the extended
2154 remote gdb protocol. NAME is the filename used for communication. */
2157 extended_remote_open (char *name, int from_tty)
2159 remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */ );
2162 /* Just like extended_remote_open, but with asynchronous support. */
2164 extended_remote_async_open (char *name, int from_tty)
2166 remote_async_open_1 (name, from_tty, &extended_async_remote_ops, 1 /*extended_p */ );
2169 /* Generic code for opening a connection to a remote target. */
2172 init_all_packet_configs (void)
2175 update_packet_config (&remote_protocol_e);
2176 update_packet_config (&remote_protocol_E);
2177 update_packet_config (&remote_protocol_P);
2178 update_packet_config (&remote_protocol_qSymbol);
2179 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
2180 update_packet_config (&remote_protocol_Z[i]);
2181 /* Force remote_write_bytes to check whether target supports binary
2183 update_packet_config (&remote_protocol_binary_download);
2186 /* Symbol look-up. */
2189 remote_check_symbols (struct objfile *objfile)
2191 struct remote_state *rs = get_remote_state ();
2192 char *msg, *reply, *tmp;
2193 struct minimal_symbol *sym;
2196 if (remote_protocol_qSymbol.support == PACKET_DISABLE)
2199 msg = alloca (rs->remote_packet_size);
2200 reply = alloca (rs->remote_packet_size);
2202 /* Invite target to request symbol lookups. */
2204 putpkt ("qSymbol::");
2205 getpkt (reply, (rs->remote_packet_size), 0);
2206 packet_ok (reply, &remote_protocol_qSymbol);
2208 while (strncmp (reply, "qSymbol:", 8) == 0)
2211 end = hex2bin (tmp, msg, strlen (tmp) / 2);
2213 sym = lookup_minimal_symbol (msg, NULL, NULL);
2215 sprintf (msg, "qSymbol::%s", &reply[8]);
2217 sprintf (msg, "qSymbol:%s:%s",
2218 paddr_nz (SYMBOL_VALUE_ADDRESS (sym)),
2221 getpkt (reply, (rs->remote_packet_size), 0);
2226 remote_open_1 (char *name, int from_tty, struct target_ops *target,
2229 struct remote_state *rs = get_remote_state ();
2231 error ("To open a remote debug connection, you need to specify what\n"
2232 "serial device is attached to the remote system\n"
2233 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
2235 /* See FIXME above */
2236 wait_forever_enabled_p = 1;
2238 target_preopen (from_tty);
2240 unpush_target (target);
2242 remote_desc = serial_open (name);
2244 perror_with_name (name);
2246 if (baud_rate != -1)
2248 if (serial_setbaudrate (remote_desc, baud_rate))
2250 serial_close (remote_desc);
2251 perror_with_name (name);
2255 serial_raw (remote_desc);
2257 /* If there is something sitting in the buffer we might take it as a
2258 response to a command, which would be bad. */
2259 serial_flush_input (remote_desc);
2263 puts_filtered ("Remote debugging using ");
2264 puts_filtered (name);
2265 puts_filtered ("\n");
2267 push_target (target); /* Switch to using remote target now */
2269 init_all_packet_configs ();
2271 general_thread = -2;
2272 continue_thread = -2;
2274 /* Probe for ability to use "ThreadInfo" query, as required. */
2275 use_threadinfo_query = 1;
2276 use_threadextra_query = 1;
2278 /* Without this, some commands which require an active target (such
2279 as kill) won't work. This variable serves (at least) double duty
2280 as both the pid of the target process (if it has such), and as a
2281 flag indicating that a target is active. These functions should
2282 be split out into seperate variables, especially since GDB will
2283 someday have a notion of debugging several processes. */
2285 inferior_ptid = pid_to_ptid (MAGIC_NULL_PID);
2286 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2287 /* First delete any symbols previously loaded from shared libraries. */
2288 no_shared_libraries (NULL, 0);
2291 /* Start the remote connection; if error (0), discard this target.
2292 In particular, if the user quits, be sure to discard it
2293 (we'd be in an inconsistent state otherwise). */
2294 if (!catch_errors (remote_start_remote, NULL,
2295 "Couldn't establish connection to remote target\n",
2304 /* Tell the remote that we are using the extended protocol. */
2305 char *buf = alloca (rs->remote_packet_size);
2307 getpkt (buf, (rs->remote_packet_size), 0);
2309 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2310 /* FIXME: need a master target_open vector from which all
2311 remote_opens can be called, so that stuff like this can
2312 go there. Failing that, the following code must be copied
2313 to the open function for any remote target that wants to
2314 support svr4 shared libraries. */
2316 /* Set up to detect and load shared libraries. */
2317 if (exec_bfd) /* No use without an exec file. */
2319 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid));
2320 remote_check_symbols (symfile_objfile);
2325 /* Just like remote_open but with asynchronous support. */
2327 remote_async_open_1 (char *name, int from_tty, struct target_ops *target,
2330 struct remote_state *rs = get_remote_state ();
2332 error ("To open a remote debug connection, you need to specify what\n"
2333 "serial device is attached to the remote system\n"
2334 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
2336 target_preopen (from_tty);
2338 unpush_target (target);
2340 remote_desc = serial_open (name);
2342 perror_with_name (name);
2344 if (baud_rate != -1)
2346 if (serial_setbaudrate (remote_desc, baud_rate))
2348 serial_close (remote_desc);
2349 perror_with_name (name);
2353 serial_raw (remote_desc);
2355 /* If there is something sitting in the buffer we might take it as a
2356 response to a command, which would be bad. */
2357 serial_flush_input (remote_desc);
2361 puts_filtered ("Remote debugging using ");
2362 puts_filtered (name);
2363 puts_filtered ("\n");
2366 push_target (target); /* Switch to using remote target now */
2368 init_all_packet_configs ();
2370 general_thread = -2;
2371 continue_thread = -2;
2373 /* Probe for ability to use "ThreadInfo" query, as required. */
2374 use_threadinfo_query = 1;
2375 use_threadextra_query = 1;
2377 /* Without this, some commands which require an active target (such
2378 as kill) won't work. This variable serves (at least) double duty
2379 as both the pid of the target process (if it has such), and as a
2380 flag indicating that a target is active. These functions should
2381 be split out into seperate variables, especially since GDB will
2382 someday have a notion of debugging several processes. */
2383 inferior_ptid = pid_to_ptid (MAGIC_NULL_PID);
2385 /* With this target we start out by owning the terminal. */
2386 remote_async_terminal_ours_p = 1;
2388 /* FIXME: cagney/1999-09-23: During the initial connection it is
2389 assumed that the target is already ready and able to respond to
2390 requests. Unfortunately remote_start_remote() eventually calls
2391 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2392 around this. Eventually a mechanism that allows
2393 wait_for_inferior() to expect/get timeouts will be
2395 wait_forever_enabled_p = 0;
2397 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2398 /* First delete any symbols previously loaded from shared libraries. */
2399 no_shared_libraries (NULL, 0);
2402 /* Start the remote connection; if error (0), discard this target.
2403 In particular, if the user quits, be sure to discard it
2404 (we'd be in an inconsistent state otherwise). */
2405 if (!catch_errors (remote_start_remote, NULL,
2406 "Couldn't establish connection to remote target\n",
2410 wait_forever_enabled_p = 1;
2414 wait_forever_enabled_p = 1;
2418 /* Tell the remote that we are using the extended protocol. */
2419 char *buf = alloca (rs->remote_packet_size);
2421 getpkt (buf, (rs->remote_packet_size), 0);
2423 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2424 /* FIXME: need a master target_open vector from which all
2425 remote_opens can be called, so that stuff like this can
2426 go there. Failing that, the following code must be copied
2427 to the open function for any remote target that wants to
2428 support svr4 shared libraries. */
2430 /* Set up to detect and load shared libraries. */
2431 if (exec_bfd) /* No use without an exec file. */
2433 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid));
2434 remote_check_symbols (symfile_objfile);
2439 /* This takes a program previously attached to and detaches it. After
2440 this is done, GDB can be used to debug some other program. We
2441 better not have left any breakpoints in the target program or it'll
2442 die when it hits one. */
2445 remote_detach (char *args, int from_tty)
2447 struct remote_state *rs = get_remote_state ();
2448 char *buf = alloca (rs->remote_packet_size);
2451 error ("Argument given to \"detach\" when remotely debugging.");
2453 /* Tell the remote target to detach. */
2455 remote_send (buf, (rs->remote_packet_size));
2457 target_mourn_inferior ();
2459 puts_filtered ("Ending remote debugging.\n");
2463 /* Same as remote_detach, but with async support. */
2465 remote_async_detach (char *args, int from_tty)
2467 struct remote_state *rs = get_remote_state ();
2468 char *buf = alloca (rs->remote_packet_size);
2471 error ("Argument given to \"detach\" when remotely debugging.");
2473 /* Tell the remote target to detach. */
2475 remote_send (buf, (rs->remote_packet_size));
2477 /* Unregister the file descriptor from the event loop. */
2478 if (target_is_async_p ())
2479 serial_async (remote_desc, NULL, 0);
2481 target_mourn_inferior ();
2483 puts_filtered ("Ending remote debugging.\n");
2486 /* Convert hex digit A to a number. */
2491 if (a >= '0' && a <= '9')
2493 else if (a >= 'a' && a <= 'f')
2494 return a - 'a' + 10;
2495 else if (a >= 'A' && a <= 'F')
2496 return a - 'A' + 10;
2498 error ("Reply contains invalid hex digit %d", a);
2502 hex2bin (const char *hex, char *bin, int count)
2506 for (i = 0; i < count; i++)
2508 if (hex[0] == 0 || hex[1] == 0)
2510 /* Hex string is short, or of uneven length.
2511 Return the count that has been converted so far. */
2514 *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]);
2520 /* Convert number NIB to a hex digit. */
2528 return 'a' + nib - 10;
2532 bin2hex (const char *bin, char *hex, int count)
2535 /* May use a length, or a nul-terminated string as input. */
2537 count = strlen (bin);
2539 for (i = 0; i < count; i++)
2541 *hex++ = tohex ((*bin >> 4) & 0xf);
2542 *hex++ = tohex (*bin++ & 0xf);
2548 /* Tell the remote machine to resume. */
2550 static enum target_signal last_sent_signal = TARGET_SIGNAL_0;
2552 static int last_sent_step;
2555 remote_resume (ptid_t ptid, int step, enum target_signal siggnal)
2557 struct remote_state *rs = get_remote_state ();
2558 char *buf = alloca (rs->remote_packet_size);
2559 int pid = PIDGET (ptid);
2563 set_thread (0, 0); /* run any thread */
2565 set_thread (pid, 0); /* run this thread */
2567 last_sent_signal = siggnal;
2568 last_sent_step = step;
2570 /* A hook for when we need to do something at the last moment before
2572 if (target_resume_hook)
2573 (*target_resume_hook) ();
2576 /* The s/S/c/C packets do not return status. So if the target does
2577 not support the S or C packets, the debug agent returns an empty
2578 string which is detected in remote_wait(). This protocol defect
2579 is fixed in the e/E packets. */
2581 if (step && step_range_end)
2583 /* If the target does not support the 'E' packet, we try the 'S'
2584 packet. Ideally we would fall back to the 'e' packet if that
2585 too is not supported. But that would require another copy of
2586 the code to issue the 'e' packet (and fall back to 's' if not
2587 supported) in remote_wait(). */
2589 if (siggnal != TARGET_SIGNAL_0)
2591 if (remote_protocol_E.support != PACKET_DISABLE)
2595 *p++ = tohex (((int) siggnal >> 4) & 0xf);
2596 *p++ = tohex (((int) siggnal) & 0xf);
2598 p += hexnumstr (p, (ULONGEST) step_range_start);
2600 p += hexnumstr (p, (ULONGEST) step_range_end);
2604 getpkt (buf, (rs->remote_packet_size), 0);
2606 if (packet_ok (buf, &remote_protocol_E) == PACKET_OK)
2612 if (remote_protocol_e.support != PACKET_DISABLE)
2616 p += hexnumstr (p, (ULONGEST) step_range_start);
2618 p += hexnumstr (p, (ULONGEST) step_range_end);
2622 getpkt (buf, (rs->remote_packet_size), 0);
2624 if (packet_ok (buf, &remote_protocol_e) == PACKET_OK)
2630 if (siggnal != TARGET_SIGNAL_0)
2632 buf[0] = step ? 'S' : 'C';
2633 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
2634 buf[2] = tohex (((int) siggnal) & 0xf);
2638 strcpy (buf, step ? "s" : "c");
2643 /* Same as remote_resume, but with async support. */
2645 remote_async_resume (ptid_t ptid, int step, enum target_signal siggnal)
2647 struct remote_state *rs = get_remote_state ();
2648 char *buf = alloca (rs->remote_packet_size);
2649 int pid = PIDGET (ptid);
2653 set_thread (0, 0); /* run any thread */
2655 set_thread (pid, 0); /* run this thread */
2657 last_sent_signal = siggnal;
2658 last_sent_step = step;
2660 /* A hook for when we need to do something at the last moment before
2662 if (target_resume_hook)
2663 (*target_resume_hook) ();
2665 /* The s/S/c/C packets do not return status. So if the target does
2666 not support the S or C packets, the debug agent returns an empty
2667 string which is detected in remote_wait(). This protocol defect
2668 is fixed in the e/E packets. */
2670 if (step && step_range_end)
2672 /* If the target does not support the 'E' packet, we try the 'S'
2673 packet. Ideally we would fall back to the 'e' packet if that
2674 too is not supported. But that would require another copy of
2675 the code to issue the 'e' packet (and fall back to 's' if not
2676 supported) in remote_wait(). */
2678 if (siggnal != TARGET_SIGNAL_0)
2680 if (remote_protocol_E.support != PACKET_DISABLE)
2684 *p++ = tohex (((int) siggnal >> 4) & 0xf);
2685 *p++ = tohex (((int) siggnal) & 0xf);
2687 p += hexnumstr (p, (ULONGEST) step_range_start);
2689 p += hexnumstr (p, (ULONGEST) step_range_end);
2693 getpkt (buf, (rs->remote_packet_size), 0);
2695 if (packet_ok (buf, &remote_protocol_E) == PACKET_OK)
2696 goto register_event_loop;
2701 if (remote_protocol_e.support != PACKET_DISABLE)
2705 p += hexnumstr (p, (ULONGEST) step_range_start);
2707 p += hexnumstr (p, (ULONGEST) step_range_end);
2711 getpkt (buf, (rs->remote_packet_size), 0);
2713 if (packet_ok (buf, &remote_protocol_e) == PACKET_OK)
2714 goto register_event_loop;
2719 if (siggnal != TARGET_SIGNAL_0)
2721 buf[0] = step ? 'S' : 'C';
2722 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
2723 buf[2] = tohex ((int) siggnal & 0xf);
2727 strcpy (buf, step ? "s" : "c");
2731 register_event_loop:
2732 /* We are about to start executing the inferior, let's register it
2733 with the event loop. NOTE: this is the one place where all the
2734 execution commands end up. We could alternatively do this in each
2735 of the execution commands in infcmd.c.*/
2736 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
2737 into infcmd.c in order to allow inferior function calls to work
2738 NOT asynchronously. */
2739 if (event_loop_p && target_can_async_p ())
2740 target_async (inferior_event_handler, 0);
2741 /* Tell the world that the target is now executing. */
2742 /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set
2743 this? Instead, should the client of target just assume (for
2744 async targets) that the target is going to start executing? Is
2745 this information already found in the continuation block? */
2746 if (target_is_async_p ())
2747 target_executing = 1;
2751 /* Set up the signal handler for SIGINT, while the target is
2752 executing, ovewriting the 'regular' SIGINT signal handler. */
2754 initialize_sigint_signal_handler (void)
2756 sigint_remote_token =
2757 create_async_signal_handler (async_remote_interrupt, NULL);
2758 signal (SIGINT, handle_remote_sigint);
2761 /* Signal handler for SIGINT, while the target is executing. */
2763 handle_remote_sigint (int sig)
2765 signal (sig, handle_remote_sigint_twice);
2766 sigint_remote_twice_token =
2767 create_async_signal_handler (async_remote_interrupt_twice, NULL);
2768 mark_async_signal_handler_wrapper (sigint_remote_token);
2771 /* Signal handler for SIGINT, installed after SIGINT has already been
2772 sent once. It will take effect the second time that the user sends
2775 handle_remote_sigint_twice (int sig)
2777 signal (sig, handle_sigint);
2778 sigint_remote_twice_token =
2779 create_async_signal_handler (inferior_event_handler_wrapper, NULL);
2780 mark_async_signal_handler_wrapper (sigint_remote_twice_token);
2783 /* Perform the real interruption of the target execution, in response
2786 async_remote_interrupt (gdb_client_data arg)
2789 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
2794 /* Perform interrupt, if the first attempt did not succeed. Just give
2795 up on the target alltogether. */
2797 async_remote_interrupt_twice (gdb_client_data arg)
2800 fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n");
2801 /* Do something only if the target was not killed by the previous
2803 if (target_executing)
2806 signal (SIGINT, handle_remote_sigint);
2810 /* Reinstall the usual SIGINT handlers, after the target has
2813 cleanup_sigint_signal_handler (void *dummy)
2815 signal (SIGINT, handle_sigint);
2816 if (sigint_remote_twice_token)
2817 delete_async_signal_handler ((struct async_signal_handler **) & sigint_remote_twice_token);
2818 if (sigint_remote_token)
2819 delete_async_signal_handler ((struct async_signal_handler **) & sigint_remote_token);
2822 /* Send ^C to target to halt it. Target will respond, and send us a
2824 static void (*ofunc) (int);
2826 /* The command line interface's stop routine. This function is installed
2827 as a signal handler for SIGINT. The first time a user requests a
2828 stop, we call remote_stop to send a break or ^C. If there is no
2829 response from the target (it didn't stop when the user requested it),
2830 we ask the user if he'd like to detach from the target. */
2832 remote_interrupt (int signo)
2834 /* If this doesn't work, try more severe steps. */
2835 signal (signo, remote_interrupt_twice);
2838 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
2843 /* The user typed ^C twice. */
2846 remote_interrupt_twice (int signo)
2848 signal (signo, ofunc);
2850 signal (signo, remote_interrupt);
2853 /* This is the generic stop called via the target vector. When a target
2854 interrupt is requested, either by the command line or the GUI, we
2855 will eventually end up here. */
2859 /* Send a break or a ^C, depending on user preference. */
2861 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
2864 serial_send_break (remote_desc);
2866 serial_write (remote_desc, "\003", 1);
2869 /* Ask the user what to do when an interrupt is received. */
2872 interrupt_query (void)
2874 target_terminal_ours ();
2876 if (query ("Interrupted while waiting for the program.\n\
2877 Give up (and stop debugging it)? "))
2879 target_mourn_inferior ();
2880 return_to_top_level (RETURN_QUIT);
2883 target_terminal_inferior ();
2886 /* Enable/disable target terminal ownership. Most targets can use
2887 terminal groups to control terminal ownership. Remote targets are
2888 different in that explicit transfer of ownership to/from GDB/target
2892 remote_async_terminal_inferior (void)
2894 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
2895 sync_execution here. This function should only be called when
2896 GDB is resuming the inferior in the forground. A background
2897 resume (``run&'') should leave GDB in control of the terminal and
2898 consequently should not call this code. */
2899 if (!sync_execution)
2901 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
2902 calls target_terminal_*() idenpotent. The event-loop GDB talking
2903 to an asynchronous target with a synchronous command calls this
2904 function from both event-top.c and infrun.c/infcmd.c. Once GDB
2905 stops trying to transfer the terminal to the target when it
2906 shouldn't this guard can go away. */
2907 if (!remote_async_terminal_ours_p)
2909 delete_file_handler (input_fd);
2910 remote_async_terminal_ours_p = 0;
2911 initialize_sigint_signal_handler ();
2912 /* NOTE: At this point we could also register our selves as the
2913 recipient of all input. Any characters typed could then be
2914 passed on down to the target. */
2918 remote_async_terminal_ours (void)
2920 /* See FIXME in remote_async_terminal_inferior. */
2921 if (!sync_execution)
2923 /* See FIXME in remote_async_terminal_inferior. */
2924 if (remote_async_terminal_ours_p)
2926 cleanup_sigint_signal_handler (NULL);
2927 add_file_handler (input_fd, stdin_event_handler, 0);
2928 remote_async_terminal_ours_p = 1;
2931 /* If nonzero, ignore the next kill. */
2936 remote_console_output (char *msg)
2940 for (p = msg; p[0] && p[1]; p += 2)
2943 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
2946 fputs_unfiltered (tb, gdb_stdtarg);
2948 gdb_flush (gdb_stdtarg);
2951 /* Wait until the remote machine stops, then return,
2952 storing status in STATUS just as `wait' would.
2953 Returns "pid", which in the case of a multi-threaded
2954 remote OS, is the thread-id. */
2957 remote_wait (ptid_t ptid, struct target_waitstatus *status)
2959 struct remote_state *rs = get_remote_state ();
2960 unsigned char *buf = alloca (rs->remote_packet_size);
2961 int thread_num = -1;
2963 status->kind = TARGET_WAITKIND_EXITED;
2964 status->value.integer = 0;
2970 ofunc = signal (SIGINT, remote_interrupt);
2971 getpkt (buf, (rs->remote_packet_size), 1);
2972 signal (SIGINT, ofunc);
2974 /* This is a hook for when we need to do something (perhaps the
2975 collection of trace data) every time the target stops. */
2976 if (target_wait_loop_hook)
2977 (*target_wait_loop_hook) ();
2981 case 'E': /* Error of some sort */
2982 warning ("Remote failure reply: %s", buf);
2984 case 'T': /* Status with PC, SP, FP, ... */
2987 char* regs = (char*) alloca (MAX_REGISTER_RAW_SIZE);
2989 /* Expedited reply, containing Signal, {regno, reg} repeat */
2990 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
2992 n... = register number
2993 r... = register contents
2995 p = &buf[3]; /* after Txx */
3003 /* Read the ``P'' register number. */
3004 LONGEST pnum = strtol ((const char *) p, &p_temp, 16);
3005 p1 = (unsigned char *) p_temp;
3007 if (p1 == p) /* No register number present here */
3009 p1 = (unsigned char *) strchr ((const char *) p, ':');
3011 warning ("Malformed packet(a) (missing colon): %s\n\
3014 if (strncmp ((const char *) p, "thread", p1 - p) == 0)
3016 p_temp = unpack_varlen_hex (++p1, &thread_num);
3017 record_currthread (thread_num);
3018 p = (unsigned char *) p_temp;
3023 struct packet_reg *reg = packet_reg_from_pnum (rs, pnum);
3027 warning ("Malformed packet(b) (missing colon): %s\n\
3032 warning ("Remote sent bad register number %s: %s\n\
3034 phex_nz (pnum, 0), p, buf);
3036 fieldsize = hex2bin (p, regs, REGISTER_RAW_SIZE (reg->regnum));
3038 if (fieldsize < REGISTER_RAW_SIZE (reg->regnum))
3039 warning ("Remote reply is too short: %s", buf);
3040 supply_register (reg->regnum, regs);
3045 warning ("Remote register badly formatted: %s", buf);
3046 warning (" here: %s", p);
3051 case 'S': /* Old style status, just signal only */
3052 status->kind = TARGET_WAITKIND_STOPPED;
3053 status->value.sig = (enum target_signal)
3054 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3058 /* Export Cisco kernel mode as a convenience variable
3059 (so that it can be used in the GDB prompt if desired). */
3061 if (cisco_kernel_mode == 1)
3062 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
3063 value_from_string ("PDEBUG-"));
3064 cisco_kernel_mode = 0;
3065 thread_num = strtol ((const char *) &buf[4], NULL, 16);
3066 record_currthread (thread_num);
3068 else if (buf[3] == 'k')
3070 /* Export Cisco kernel mode as a convenience variable
3071 (so that it can be used in the GDB prompt if desired). */
3073 if (cisco_kernel_mode == 1)
3074 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
3075 value_from_string ("KDEBUG-"));
3076 cisco_kernel_mode = 1;
3079 case 'N': /* Cisco special: status and offsets */
3081 bfd_vma text_addr, data_addr, bss_addr;
3082 bfd_signed_vma text_off, data_off, bss_off;
3085 status->kind = TARGET_WAITKIND_STOPPED;
3086 status->value.sig = (enum target_signal)
3087 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3089 if (symfile_objfile == NULL)
3091 warning ("Relocation packet received with no symbol file. \
3096 /* Relocate object file. Buffer format is NAATT;DD;BB
3097 * where AA is the signal number, TT is the new text
3098 * address, DD * is the new data address, and BB is the
3099 * new bss address. */
3102 text_addr = strtoul (p, (char **) &p1, 16);
3103 if (p1 == p || *p1 != ';')
3104 warning ("Malformed relocation packet: Packet '%s'", buf);
3106 data_addr = strtoul (p, (char **) &p1, 16);
3107 if (p1 == p || *p1 != ';')
3108 warning ("Malformed relocation packet: Packet '%s'", buf);
3110 bss_addr = strtoul (p, (char **) &p1, 16);
3112 warning ("Malformed relocation packet: Packet '%s'", buf);
3114 if (remote_cisco_section_offsets (text_addr, data_addr, bss_addr,
3115 &text_off, &data_off, &bss_off)
3117 if (text_off != 0 || data_off != 0 || bss_off != 0)
3118 remote_cisco_objfile_relocate (text_off, data_off, bss_off);
3122 case 'W': /* Target exited */
3124 /* The remote process exited. */
3125 status->kind = TARGET_WAITKIND_EXITED;
3126 status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
3130 status->kind = TARGET_WAITKIND_SIGNALLED;
3131 status->value.sig = (enum target_signal)
3132 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3136 case 'O': /* Console output */
3137 remote_console_output (buf + 1);
3140 if (last_sent_signal != TARGET_SIGNAL_0)
3142 /* Zero length reply means that we tried 'S' or 'C' and
3143 the remote system doesn't support it. */
3144 target_terminal_ours_for_output ();
3146 ("Can't send signals to this remote system. %s not sent.\n",
3147 target_signal_to_name (last_sent_signal));
3148 last_sent_signal = TARGET_SIGNAL_0;
3149 target_terminal_inferior ();
3151 strcpy ((char *) buf, last_sent_step ? "s" : "c");
3152 putpkt ((char *) buf);
3155 /* else fallthrough */
3157 warning ("Invalid remote reply: %s", buf);
3162 if (thread_num != -1)
3164 return pid_to_ptid (thread_num);
3166 return inferior_ptid;
3169 /* Async version of remote_wait. */
3171 remote_async_wait (ptid_t ptid, struct target_waitstatus *status)
3173 struct remote_state *rs = get_remote_state ();
3174 unsigned char *buf = alloca (rs->remote_packet_size);
3175 int thread_num = -1;
3177 status->kind = TARGET_WAITKIND_EXITED;
3178 status->value.integer = 0;
3184 if (!target_is_async_p ())
3185 ofunc = signal (SIGINT, remote_interrupt);
3186 /* FIXME: cagney/1999-09-27: If we're in async mode we should
3187 _never_ wait for ever -> test on target_is_async_p().
3188 However, before we do that we need to ensure that the caller
3189 knows how to take the target into/out of async mode. */
3190 getpkt (buf, (rs->remote_packet_size), wait_forever_enabled_p);
3191 if (!target_is_async_p ())
3192 signal (SIGINT, ofunc);
3194 /* This is a hook for when we need to do something (perhaps the
3195 collection of trace data) every time the target stops. */
3196 if (target_wait_loop_hook)
3197 (*target_wait_loop_hook) ();
3201 case 'E': /* Error of some sort */
3202 warning ("Remote failure reply: %s", buf);
3204 case 'T': /* Status with PC, SP, FP, ... */
3207 char* regs = (char*) alloca (MAX_REGISTER_RAW_SIZE);
3209 /* Expedited reply, containing Signal, {regno, reg} repeat */
3210 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3212 n... = register number
3213 r... = register contents
3215 p = &buf[3]; /* after Txx */
3223 /* Read the register number */
3224 long pnum = strtol ((const char *) p, &p_temp, 16);
3225 p1 = (unsigned char *) p_temp;
3227 if (p1 == p) /* No register number present here */
3229 p1 = (unsigned char *) strchr ((const char *) p, ':');
3231 warning ("Malformed packet(a) (missing colon): %s\n\
3234 if (strncmp ((const char *) p, "thread", p1 - p) == 0)
3236 p_temp = unpack_varlen_hex (++p1, &thread_num);
3237 record_currthread (thread_num);
3238 p = (unsigned char *) p_temp;
3243 struct packet_reg *reg = packet_reg_from_pnum (rs, pnum);
3246 warning ("Malformed packet(b) (missing colon): %s\n\
3251 warning ("Remote sent bad register number %ld: %s\n\
3255 fieldsize = hex2bin (p, regs, REGISTER_RAW_SIZE (reg->regnum));
3257 if (fieldsize < REGISTER_RAW_SIZE (reg->regnum))
3258 warning ("Remote reply is too short: %s", buf);
3259 supply_register (reg->regnum, regs);
3264 warning ("Remote register badly formatted: %s", buf);
3265 warning (" here: %s", p);
3270 case 'S': /* Old style status, just signal only */
3271 status->kind = TARGET_WAITKIND_STOPPED;
3272 status->value.sig = (enum target_signal)
3273 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3277 /* Export Cisco kernel mode as a convenience variable
3278 (so that it can be used in the GDB prompt if desired). */
3280 if (cisco_kernel_mode == 1)
3281 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
3282 value_from_string ("PDEBUG-"));
3283 cisco_kernel_mode = 0;
3284 thread_num = strtol ((const char *) &buf[4], NULL, 16);
3285 record_currthread (thread_num);
3287 else if (buf[3] == 'k')
3289 /* Export Cisco kernel mode as a convenience variable
3290 (so that it can be used in the GDB prompt if desired). */
3292 if (cisco_kernel_mode == 1)
3293 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
3294 value_from_string ("KDEBUG-"));
3295 cisco_kernel_mode = 1;
3298 case 'N': /* Cisco special: status and offsets */
3300 bfd_vma text_addr, data_addr, bss_addr;
3301 bfd_signed_vma text_off, data_off, bss_off;
3304 status->kind = TARGET_WAITKIND_STOPPED;
3305 status->value.sig = (enum target_signal)
3306 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3308 if (symfile_objfile == NULL)
3310 warning ("Relocation packet recieved with no symbol file. \
3315 /* Relocate object file. Buffer format is NAATT;DD;BB
3316 * where AA is the signal number, TT is the new text
3317 * address, DD * is the new data address, and BB is the
3318 * new bss address. */
3321 text_addr = strtoul (p, (char **) &p1, 16);
3322 if (p1 == p || *p1 != ';')
3323 warning ("Malformed relocation packet: Packet '%s'", buf);
3325 data_addr = strtoul (p, (char **) &p1, 16);
3326 if (p1 == p || *p1 != ';')
3327 warning ("Malformed relocation packet: Packet '%s'", buf);
3329 bss_addr = strtoul (p, (char **) &p1, 16);
3331 warning ("Malformed relocation packet: Packet '%s'", buf);
3333 if (remote_cisco_section_offsets (text_addr, data_addr, bss_addr,
3334 &text_off, &data_off, &bss_off)
3336 if (text_off != 0 || data_off != 0 || bss_off != 0)
3337 remote_cisco_objfile_relocate (text_off, data_off, bss_off);
3341 case 'W': /* Target exited */
3343 /* The remote process exited. */
3344 status->kind = TARGET_WAITKIND_EXITED;
3345 status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
3349 status->kind = TARGET_WAITKIND_SIGNALLED;
3350 status->value.sig = (enum target_signal)
3351 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3355 case 'O': /* Console output */
3356 remote_console_output (buf + 1);
3357 /* Return immediately to the event loop. The event loop will
3358 still be waiting on the inferior afterwards. */
3359 status->kind = TARGET_WAITKIND_IGNORE;
3362 if (last_sent_signal != TARGET_SIGNAL_0)
3364 /* Zero length reply means that we tried 'S' or 'C' and
3365 the remote system doesn't support it. */
3366 target_terminal_ours_for_output ();
3368 ("Can't send signals to this remote system. %s not sent.\n",
3369 target_signal_to_name (last_sent_signal));
3370 last_sent_signal = TARGET_SIGNAL_0;
3371 target_terminal_inferior ();
3373 strcpy ((char *) buf, last_sent_step ? "s" : "c");
3374 putpkt ((char *) buf);
3377 /* else fallthrough */
3379 warning ("Invalid remote reply: %s", buf);
3384 if (thread_num != -1)
3386 return pid_to_ptid (thread_num);
3388 return inferior_ptid;
3391 /* Number of bytes of registers this stub implements. */
3393 static int register_bytes_found;
3395 /* Read the remote registers into the block REGS. */
3396 /* Currently we just read all the registers, so we don't use regnum. */
3400 remote_fetch_registers (int regnum)
3402 struct remote_state *rs = get_remote_state ();
3403 char *buf = alloca (rs->remote_packet_size);
3406 char *regs = alloca (rs->sizeof_g_packet);
3408 set_thread (PIDGET (inferior_ptid), 1);
3412 struct packet_reg *reg = packet_reg_from_regnum (rs, regnum);
3413 gdb_assert (reg != NULL);
3414 if (!reg->in_g_packet)
3415 internal_error (__FILE__, __LINE__,
3416 "Attempt to fetch a non G-packet register when this "
3417 "remote.c does not support the p-packet.");
3421 remote_send (buf, (rs->remote_packet_size));
3423 /* Save the size of the packet sent to us by the target. Its used
3424 as a heuristic when determining the max size of packets that the
3425 target can safely receive. */
3426 if ((rs->actual_register_packet_size) == 0)
3427 (rs->actual_register_packet_size) = strlen (buf);
3429 /* Unimplemented registers read as all bits zero. */
3430 memset (regs, 0, rs->sizeof_g_packet);
3432 /* We can get out of synch in various cases. If the first character
3433 in the buffer is not a hex character, assume that has happened
3434 and try to fetch another packet to read. */
3435 while ((buf[0] < '0' || buf[0] > '9')
3436 && (buf[0] < 'a' || buf[0] > 'f')
3437 && buf[0] != 'x') /* New: unavailable register value */
3440 fprintf_unfiltered (gdb_stdlog,
3441 "Bad register packet; fetching a new packet\n");
3442 getpkt (buf, (rs->remote_packet_size), 0);
3445 /* Reply describes registers byte by byte, each byte encoded as two
3446 hex characters. Suck them all up, then supply them to the
3447 register cacheing/storage mechanism. */
3450 for (i = 0; i < rs->sizeof_g_packet; i++)
3456 warning ("Remote reply is of odd length: %s", buf);
3457 /* Don't change register_bytes_found in this case, and don't
3458 print a second warning. */
3461 if (p[0] == 'x' && p[1] == 'x')
3462 regs[i] = 0; /* 'x' */
3464 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
3468 if (i != register_bytes_found)
3470 register_bytes_found = i;
3471 if (REGISTER_BYTES_OK_P ()
3472 && !REGISTER_BYTES_OK (i))
3473 warning ("Remote reply is too short: %s", buf);
3479 for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++)
3481 struct packet_reg *r = &rs->regs[i];
3484 supply_register (r->regnum, regs + r->offset);
3485 if (buf[r->offset * 2] == 'x')
3486 set_register_cached (i, -1);
3492 /* Prepare to store registers. Since we may send them all (using a
3493 'G' request), we have to read out the ones we don't want to change
3497 remote_prepare_to_store (void)
3499 /* Make sure the entire registers array is valid. */
3500 switch (remote_protocol_P.support)
3502 case PACKET_DISABLE:
3503 case PACKET_SUPPORT_UNKNOWN:
3504 /* NOTE: This isn't rs->sizeof_g_packet because here, we are
3505 forcing the register cache to read its and not the target
3507 read_register_bytes (0, (char *) NULL, REGISTER_BYTES); /* OK use. */
3514 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
3515 packet was not recognized. */
3518 store_register_using_P (int regnum)
3520 struct remote_state *rs = get_remote_state ();
3521 struct packet_reg *reg = packet_reg_from_regnum (rs, regnum);
3522 /* Try storing a single register. */
3523 char *buf = alloca (rs->remote_packet_size);
3524 char *regp = alloca (MAX_REGISTER_RAW_SIZE);
3528 sprintf (buf, "P%s=", phex_nz (reg->pnum, 0));
3529 p = buf + strlen (buf);
3530 regcache_collect (reg->regnum, regp);
3531 bin2hex (regp, p, REGISTER_RAW_SIZE (reg->regnum));
3532 remote_send (buf, rs->remote_packet_size);
3534 return buf[0] != '\0';
3538 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
3539 of the register cache buffer. FIXME: ignores errors. */
3542 remote_store_registers (int regnum)
3544 struct remote_state *rs = get_remote_state ();
3550 set_thread (PIDGET (inferior_ptid), 1);
3554 switch (remote_protocol_P.support)
3556 case PACKET_DISABLE:
3559 if (store_register_using_P (regnum))
3562 error ("Protocol error: P packet not recognized by stub");
3563 case PACKET_SUPPORT_UNKNOWN:
3564 if (store_register_using_P (regnum))
3566 /* The stub recognized the 'P' packet. Remember this. */
3567 remote_protocol_P.support = PACKET_ENABLE;
3572 /* The stub does not support the 'P' packet. Use 'G'
3573 instead, and don't try using 'P' in the future (it
3574 will just waste our time). */
3575 remote_protocol_P.support = PACKET_DISABLE;
3581 /* Extract all the registers in the regcache copying them into a
3585 regs = alloca (rs->sizeof_g_packet);
3586 memset (regs, rs->sizeof_g_packet, 0);
3587 for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++)
3589 struct packet_reg *r = &rs->regs[i];
3591 regcache_collect (r->regnum, regs + r->offset);
3595 /* Command describes registers byte by byte,
3596 each byte encoded as two hex characters. */
3597 buf = alloca (rs->remote_packet_size);
3600 /* remote_prepare_to_store insures that register_bytes_found gets set. */
3601 bin2hex (regs, p, register_bytes_found);
3602 remote_send (buf, (rs->remote_packet_size));
3606 /* Return the number of hex digits in num. */
3609 hexnumlen (ULONGEST num)
3613 for (i = 0; num != 0; i++)
3619 /* Set BUF to the minimum number of hex digits representing NUM. */
3622 hexnumstr (char *buf, ULONGEST num)
3624 int len = hexnumlen (num);
3625 return hexnumnstr (buf, num, len);
3629 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
3632 hexnumnstr (char *buf, ULONGEST num, int width)
3638 for (i = width - 1; i >= 0; i--)
3640 buf[i] = "0123456789abcdef"[(num & 0xf)];
3647 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
3650 remote_address_masked (CORE_ADDR addr)
3652 if (remote_address_size > 0
3653 && remote_address_size < (sizeof (ULONGEST) * 8))
3655 /* Only create a mask when that mask can safely be constructed
3656 in a ULONGEST variable. */
3658 mask = (mask << remote_address_size) - 1;
3664 /* Determine whether the remote target supports binary downloading.
3665 This is accomplished by sending a no-op memory write of zero length
3666 to the target at the specified address. It does not suffice to send
3667 the whole packet, since many stubs strip the eighth bit and subsequently
3668 compute a wrong checksum, which causes real havoc with remote_write_bytes.
3670 NOTE: This can still lose if the serial line is not eight-bit
3671 clean. In cases like this, the user should clear "remote
3675 check_binary_download (CORE_ADDR addr)
3677 struct remote_state *rs = get_remote_state ();
3678 switch (remote_protocol_binary_download.support)
3680 case PACKET_DISABLE:
3684 case PACKET_SUPPORT_UNKNOWN:
3686 char *buf = alloca (rs->remote_packet_size);
3691 p += hexnumstr (p, (ULONGEST) addr);
3693 p += hexnumstr (p, (ULONGEST) 0);
3697 putpkt_binary (buf, (int) (p - buf));
3698 getpkt (buf, (rs->remote_packet_size), 0);
3703 fprintf_unfiltered (gdb_stdlog,
3704 "binary downloading NOT suppported by target\n");
3705 remote_protocol_binary_download.support = PACKET_DISABLE;
3710 fprintf_unfiltered (gdb_stdlog,
3711 "binary downloading suppported by target\n");
3712 remote_protocol_binary_download.support = PACKET_ENABLE;
3719 /* Write memory data directly to the remote machine.
3720 This does not inform the data cache; the data cache uses this.
3721 MEMADDR is the address in the remote memory space.
3722 MYADDR is the address of the buffer in our space.
3723 LEN is the number of bytes.
3725 Returns number of bytes transferred, or 0 (setting errno) for
3726 error. Only transfer a single packet. */
3729 remote_write_bytes (CORE_ADDR memaddr, char *myaddr, int len)
3732 int max_buf_size; /* Max size of packet output buffer */
3734 unsigned char *plen;
3740 /* Verify that the target can support a binary download */
3741 check_binary_download (memaddr);
3743 /* Determine the max packet size. */
3744 max_buf_size = get_memory_write_packet_size ();
3745 sizeof_buf = max_buf_size + 1; /* Space for trailing NUL */
3746 buf = alloca (sizeof_buf);
3748 /* Subtract header overhead from max payload size - $M<memaddr>,<len>:#nn */
3749 max_buf_size -= 2 + hexnumlen (memaddr + len - 1) + 1 + hexnumlen (len) + 4;
3751 /* construct "M"<memaddr>","<len>":" */
3752 /* sprintf (buf, "M%lx,%x:", (unsigned long) memaddr, todo); */
3755 /* Append [XM]. Compute a best guess of the number of bytes
3756 actually transfered. */
3757 switch (remote_protocol_binary_download.support)
3761 /* Best guess at number of bytes that will fit. */
3762 todo = min (len, max_buf_size);
3764 case PACKET_DISABLE:
3766 /* num bytes that will fit */
3767 todo = min (len, max_buf_size / 2);
3769 case PACKET_SUPPORT_UNKNOWN:
3770 internal_error (__FILE__, __LINE__,
3771 "remote_write_bytes: bad internal state");
3773 internal_error (__FILE__, __LINE__, "bad switch");
3776 /* Append <memaddr> */
3777 memaddr = remote_address_masked (memaddr);
3778 p += hexnumstr (p, (ULONGEST) memaddr);
3781 /* Append <len>. Retain the location/size of <len>. It may
3782 need to be adjusted once the packet body has been created. */
3784 plenlen = hexnumstr (p, (ULONGEST) todo);
3789 /* Append the packet body. */
3790 switch (remote_protocol_binary_download.support)
3793 /* Binary mode. Send target system values byte by byte, in
3794 increasing byte addresses. Only escape certain critical
3797 (nr_bytes < todo) && (p - buf) < (max_buf_size - 2);
3800 switch (myaddr[nr_bytes] & 0xff)
3805 /* These must be escaped */
3807 *p++ = (myaddr[nr_bytes] & 0xff) ^ 0x20;
3810 *p++ = myaddr[nr_bytes] & 0xff;
3814 if (nr_bytes < todo)
3816 /* Escape chars have filled up the buffer prematurely,
3817 and we have actually sent fewer bytes than planned.
3818 Fix-up the length field of the packet. Use the same
3819 number of characters as before. */
3821 plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen);
3822 *plen = ':'; /* overwrite \0 from hexnumnstr() */
3825 case PACKET_DISABLE:
3826 /* Normal mode: Send target system values byte by byte, in
3827 increasing byte addresses. Each byte is encoded as a two hex
3829 nr_bytes = bin2hex (myaddr, p, todo);
3832 case PACKET_SUPPORT_UNKNOWN:
3833 internal_error (__FILE__, __LINE__,
3834 "remote_write_bytes: bad internal state");
3836 internal_error (__FILE__, __LINE__, "bad switch");
3839 putpkt_binary (buf, (int) (p - buf));
3840 getpkt (buf, sizeof_buf, 0);
3844 /* There is no correspondance between what the remote protocol
3845 uses for errors and errno codes. We would like a cleaner way
3846 of representing errors (big enough to include errno codes,
3847 bfd_error codes, and others). But for now just return EIO. */
3852 /* Return NR_BYTES, not TODO, in case escape chars caused us to send fewer
3853 bytes than we'd planned. */
3857 /* Read memory data directly from the remote machine.
3858 This does not use the data cache; the data cache uses this.
3859 MEMADDR is the address in the remote memory space.
3860 MYADDR is the address of the buffer in our space.
3861 LEN is the number of bytes.
3863 Returns number of bytes transferred, or 0 for error. */
3865 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
3866 remote targets) shouldn't attempt to read the entire buffer.
3867 Instead it should read a single packet worth of data and then
3868 return the byte size of that packet to the caller. The caller (its
3869 caller and its callers caller ;-) already contains code for
3870 handling partial reads. */
3873 remote_read_bytes (CORE_ADDR memaddr, char *myaddr, int len)
3876 int max_buf_size; /* Max size of packet output buffer */
3880 /* Create a buffer big enough for this packet. */
3881 max_buf_size = get_memory_read_packet_size ();
3882 sizeof_buf = max_buf_size + 1; /* Space for trailing NUL */
3883 buf = alloca (sizeof_buf);
3892 todo = min (len, max_buf_size / 2); /* num bytes that will fit */
3894 /* construct "m"<memaddr>","<len>" */
3895 /* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */
3896 memaddr = remote_address_masked (memaddr);
3899 p += hexnumstr (p, (ULONGEST) memaddr);
3901 p += hexnumstr (p, (ULONGEST) todo);
3905 getpkt (buf, sizeof_buf, 0);
3909 /* There is no correspondance between what the remote protocol uses
3910 for errors and errno codes. We would like a cleaner way of
3911 representing errors (big enough to include errno codes, bfd_error
3912 codes, and others). But for now just return EIO. */
3917 /* Reply describes memory byte by byte,
3918 each byte encoded as two hex characters. */
3921 if ((i = hex2bin (p, myaddr, todo)) < todo)
3923 /* Reply is short. This means that we were able to read
3924 only part of what we wanted to. */
3925 return i + (origlen - len);
3934 /* Read or write LEN bytes from inferior memory at MEMADDR,
3935 transferring to or from debugger address BUFFER. Write to inferior if
3936 SHOULD_WRITE is nonzero. Returns length of data written or read; 0
3937 for error. TARGET is unused. */
3941 remote_xfer_memory (CORE_ADDR mem_addr, char *buffer, int mem_len,
3942 int should_write, struct mem_attrib *attrib,
3943 struct target_ops *target)
3945 CORE_ADDR targ_addr;
3949 REMOTE_TRANSLATE_XFER_ADDRESS (mem_addr, mem_len, &targ_addr, &targ_len);
3954 res = remote_write_bytes (targ_addr, buffer, targ_len);
3956 res = remote_read_bytes (targ_addr, buffer, targ_len);
3963 /* Enable after 4.12. */
3966 remote_search (int len, char *data, char *mask, CORE_ADDR startaddr,
3967 int increment, CORE_ADDR lorange, CORE_ADDR hirange,
3968 CORE_ADDR *addr_found, char *data_found)
3970 if (increment == -4 && len == 4)
3972 long mask_long, data_long;
3973 long data_found_long;
3974 CORE_ADDR addr_we_found;
3975 char *buf = alloca (rs->remote_packet_size);
3976 long returned_long[2];
3979 mask_long = extract_unsigned_integer (mask, len);
3980 data_long = extract_unsigned_integer (data, len);
3981 sprintf (buf, "t%x:%x,%x", startaddr, data_long, mask_long);
3983 getpkt (buf, (rs->remote_packet_size), 0);
3986 /* The stub doesn't support the 't' request. We might want to
3987 remember this fact, but on the other hand the stub could be
3988 switched on us. Maybe we should remember it only until
3989 the next "target remote". */
3990 generic_search (len, data, mask, startaddr, increment, lorange,
3991 hirange, addr_found, data_found);
3996 /* There is no correspondance between what the remote protocol uses
3997 for errors and errno codes. We would like a cleaner way of
3998 representing errors (big enough to include errno codes, bfd_error
3999 codes, and others). But for now just use EIO. */
4000 memory_error (EIO, startaddr);
4003 while (*p != '\0' && *p != ',')
4004 addr_we_found = (addr_we_found << 4) + fromhex (*p++);
4006 error ("Protocol error: short return for search");
4008 data_found_long = 0;
4009 while (*p != '\0' && *p != ',')
4010 data_found_long = (data_found_long << 4) + fromhex (*p++);
4011 /* Ignore anything after this comma, for future extensions. */
4013 if (addr_we_found < lorange || addr_we_found >= hirange)
4019 *addr_found = addr_we_found;
4020 *data_found = store_unsigned_integer (data_we_found, len);
4023 generic_search (len, data, mask, startaddr, increment, lorange,
4024 hirange, addr_found, data_found);
4029 remote_files_info (struct target_ops *ignore)
4031 puts_filtered ("Debugging a target over a serial line.\n");
4034 /* Stuff for dealing with the packets which are part of this protocol.
4035 See comment at top of file for details. */
4037 /* Read a single character from the remote end, masking it down to 7 bits. */
4040 readchar (int timeout)
4044 ch = serial_readchar (remote_desc, timeout);
4049 switch ((enum serial_rc) ch)
4052 target_mourn_inferior ();
4053 error ("Remote connection closed");
4056 perror_with_name ("Remote communication error");
4058 case SERIAL_TIMEOUT:
4064 /* Send the command in BUF to the remote machine, and read the reply
4065 into BUF. Report an error if we get an error reply. */
4068 remote_send (char *buf,
4072 getpkt (buf, sizeof_buf, 0);
4075 error ("Remote failure reply: %s", buf);
4078 /* Display a null-terminated packet on stdout, for debugging, using C
4082 print_packet (char *buf)
4084 puts_filtered ("\"");
4085 fputstr_filtered (buf, '"', gdb_stdout);
4086 puts_filtered ("\"");
4092 return putpkt_binary (buf, strlen (buf));
4095 /* Send a packet to the remote machine, with error checking. The data
4096 of the packet is in BUF. The string in BUF can be at most (rs->remote_packet_size) - 5
4097 to account for the $, # and checksum, and for a possible /0 if we are
4098 debugging (remote_debug) and want to print the sent packet as a string */
4101 putpkt_binary (char *buf, int cnt)
4103 struct remote_state *rs = get_remote_state ();
4105 unsigned char csum = 0;
4106 char *buf2 = alloca (cnt + 6);
4107 long sizeof_junkbuf = (rs->remote_packet_size);
4108 char *junkbuf = alloca (sizeof_junkbuf);
4114 /* Copy the packet into buffer BUF2, encapsulating it
4115 and giving it a checksum. */
4120 for (i = 0; i < cnt; i++)
4126 *p++ = tohex ((csum >> 4) & 0xf);
4127 *p++ = tohex (csum & 0xf);
4129 /* Send it over and over until we get a positive ack. */
4133 int started_error_output = 0;
4138 fprintf_unfiltered (gdb_stdlog, "Sending packet: ");
4139 fputstrn_unfiltered (buf2, p - buf2, 0, gdb_stdlog);
4140 fprintf_unfiltered (gdb_stdlog, "...");
4141 gdb_flush (gdb_stdlog);
4143 if (serial_write (remote_desc, buf2, p - buf2))
4144 perror_with_name ("putpkt: write failed");
4146 /* read until either a timeout occurs (-2) or '+' is read */
4149 ch = readchar (remote_timeout);
4157 case SERIAL_TIMEOUT:
4159 if (started_error_output)
4161 putchar_unfiltered ('\n');
4162 started_error_output = 0;
4171 fprintf_unfiltered (gdb_stdlog, "Ack\n");
4175 fprintf_unfiltered (gdb_stdlog, "Nak\n");
4176 case SERIAL_TIMEOUT:
4180 break; /* Retransmit buffer */
4184 fprintf_unfiltered (gdb_stdlog, "Packet instead of Ack, ignoring it\n");
4185 /* It's probably an old response, and we're out of sync.
4186 Just gobble up the packet and ignore it. */
4187 read_frame (junkbuf, sizeof_junkbuf);
4188 continue; /* Now, go look for + */
4193 if (!started_error_output)
4195 started_error_output = 1;
4196 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
4198 fputc_unfiltered (ch & 0177, gdb_stdlog);
4202 break; /* Here to retransmit */
4206 /* This is wrong. If doing a long backtrace, the user should be
4207 able to get out next time we call QUIT, without anything as
4208 violent as interrupt_query. If we want to provide a way out of
4209 here without getting to the next QUIT, it should be based on
4210 hitting ^C twice as in remote_wait. */
4220 static int remote_cisco_mode;
4222 /* Come here after finding the start of the frame. Collect the rest
4223 into BUF, verifying the checksum, length, and handling run-length
4224 compression. No more than sizeof_buf-1 characters are read so that
4225 the buffer can be NUL terminated.
4227 Returns -1 on error, number of characters in buffer (ignoring the
4228 trailing NULL) on success. (could be extended to return one of the
4229 SERIAL status indications). */
4232 read_frame (char *buf,
4244 /* ASSERT (bc < sizeof_buf - 1) - space for trailing NUL */
4245 c = readchar (remote_timeout);
4248 case SERIAL_TIMEOUT:
4250 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
4254 fputs_filtered ("Saw new packet start in middle of old one\n",
4256 return -1; /* Start a new packet, count retries */
4259 unsigned char pktcsum;
4265 check_0 = readchar (remote_timeout);
4267 check_1 = readchar (remote_timeout);
4269 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
4272 fputs_filtered ("Timeout in checksum, retrying\n", gdb_stdlog);
4275 else if (check_0 < 0 || check_1 < 0)
4278 fputs_filtered ("Communication error in checksum\n", gdb_stdlog);
4282 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
4283 if (csum == pktcsum)
4288 fprintf_filtered (gdb_stdlog,
4289 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
4291 fputs_filtered (buf, gdb_stdlog);
4292 fputs_filtered ("\n", gdb_stdlog);
4294 /* Number of characters in buffer ignoring trailing
4298 case '*': /* Run length encoding */
4303 if (remote_cisco_mode == 0)
4305 c = readchar (remote_timeout);
4307 repeat = c - ' ' + 3; /* Compute repeat count */
4311 /* Cisco's run-length encoding variant uses two
4312 hex chars to represent the repeat count. */
4314 c = readchar (remote_timeout);
4316 repeat = fromhex (c) << 4;
4317 c = readchar (remote_timeout);
4319 repeat += fromhex (c);
4322 /* The character before ``*'' is repeated. */
4324 if (repeat > 0 && repeat <= 255
4326 && bc + repeat - 1 < sizeof_buf - 1)
4328 memset (&buf[bc], buf[bc - 1], repeat);
4334 printf_filtered ("Repeat count %d too large for buffer: ", repeat);
4335 puts_filtered (buf);
4336 puts_filtered ("\n");
4340 if (bc < sizeof_buf - 1)
4348 puts_filtered ("Remote packet too long: ");
4349 puts_filtered (buf);
4350 puts_filtered ("\n");
4357 /* Read a packet from the remote machine, with error checking, and
4358 store it in BUF. If FOREVER, wait forever rather than timing out;
4359 this is used (in synchronous mode) to wait for a target that is is
4360 executing user code to stop. */
4361 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
4362 don't have to change all the calls to getpkt to deal with the
4363 return value, because at the moment I don't know what the right
4364 thing to do it for those. */
4372 timed_out = getpkt_sane (buf, sizeof_buf, forever);
4376 /* Read a packet from the remote machine, with error checking, and
4377 store it in BUF. If FOREVER, wait forever rather than timing out;
4378 this is used (in synchronous mode) to wait for a target that is is
4379 executing user code to stop. If FOREVER == 0, this function is
4380 allowed to time out gracefully and return an indication of this to
4383 getpkt_sane (char *buf,
4392 strcpy (buf, "timeout");
4396 timeout = watchdog > 0 ? watchdog : -1;
4400 timeout = remote_timeout;
4404 for (tries = 1; tries <= MAX_TRIES; tries++)
4406 /* This can loop forever if the remote side sends us characters
4407 continuously, but if it pauses, we'll get a zero from readchar
4408 because of timeout. Then we'll count that as a retry. */
4410 /* Note that we will only wait forever prior to the start of a packet.
4411 After that, we expect characters to arrive at a brisk pace. They
4412 should show up within remote_timeout intervals. */
4416 c = readchar (timeout);
4418 if (c == SERIAL_TIMEOUT)
4420 if (forever) /* Watchdog went off? Kill the target. */
4423 target_mourn_inferior ();
4424 error ("Watchdog has expired. Target detached.\n");
4427 fputs_filtered ("Timed out.\n", gdb_stdlog);
4433 /* We've found the start of a packet, now collect the data. */
4435 val = read_frame (buf, sizeof_buf);
4441 fprintf_unfiltered (gdb_stdlog, "Packet received: ");
4442 fputstr_unfiltered (buf, 0, gdb_stdlog);
4443 fprintf_unfiltered (gdb_stdlog, "\n");
4445 serial_write (remote_desc, "+", 1);
4449 /* Try the whole thing again. */
4451 serial_write (remote_desc, "-", 1);
4454 /* We have tried hard enough, and just can't receive the packet. Give up. */
4456 printf_unfiltered ("Ignoring packet error, continuing...\n");
4457 serial_write (remote_desc, "+", 1);
4464 /* For some mysterious reason, wait_for_inferior calls kill instead of
4465 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4469 target_mourn_inferior ();
4473 /* Use catch_errors so the user can quit from gdb even when we aren't on
4474 speaking terms with the remote system. */
4475 catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
4477 /* Don't wait for it to die. I'm not really sure it matters whether
4478 we do or not. For the existing stubs, kill is a noop. */
4479 target_mourn_inferior ();
4482 /* Async version of remote_kill. */
4484 remote_async_kill (void)
4486 /* Unregister the file descriptor from the event loop. */
4487 if (target_is_async_p ())
4488 serial_async (remote_desc, NULL, 0);
4490 /* For some mysterious reason, wait_for_inferior calls kill instead of
4491 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4495 target_mourn_inferior ();
4499 /* Use catch_errors so the user can quit from gdb even when we aren't on
4500 speaking terms with the remote system. */
4501 catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
4503 /* Don't wait for it to die. I'm not really sure it matters whether
4504 we do or not. For the existing stubs, kill is a noop. */
4505 target_mourn_inferior ();
4511 remote_mourn_1 (&remote_ops);
4515 remote_async_mourn (void)
4517 remote_mourn_1 (&remote_async_ops);
4521 extended_remote_mourn (void)
4523 /* We do _not_ want to mourn the target like this; this will
4524 remove the extended remote target from the target stack,
4525 and the next time the user says "run" it'll fail.
4527 FIXME: What is the right thing to do here? */
4529 remote_mourn_1 (&extended_remote_ops);
4533 /* Worker function for remote_mourn. */
4535 remote_mourn_1 (struct target_ops *target)
4537 unpush_target (target);
4538 generic_mourn_inferior ();
4541 /* In the extended protocol we want to be able to do things like
4542 "run" and have them basically work as expected. So we need
4543 a special create_inferior function.
4545 FIXME: One day add support for changing the exec file
4546 we're debugging, arguments and an environment. */
4549 extended_remote_create_inferior (char *exec_file, char *args, char **env)
4551 /* Rip out the breakpoints; we'll reinsert them after restarting
4552 the remote server. */
4553 remove_breakpoints ();
4555 /* Now restart the remote server. */
4556 extended_remote_restart ();
4558 /* Now put the breakpoints back in. This way we're safe if the
4559 restart function works via a unix fork on the remote side. */
4560 insert_breakpoints ();
4562 /* Clean up from the last time we were running. */
4563 clear_proceed_status ();
4565 /* Let the remote process run. */
4566 proceed (-1, TARGET_SIGNAL_0, 0);
4569 /* Async version of extended_remote_create_inferior. */
4571 extended_remote_async_create_inferior (char *exec_file, char *args, char **env)
4573 /* Rip out the breakpoints; we'll reinsert them after restarting
4574 the remote server. */
4575 remove_breakpoints ();
4577 /* If running asynchronously, register the target file descriptor
4578 with the event loop. */
4579 if (event_loop_p && target_can_async_p ())
4580 target_async (inferior_event_handler, 0);
4582 /* Now restart the remote server. */
4583 extended_remote_restart ();
4585 /* Now put the breakpoints back in. This way we're safe if the
4586 restart function works via a unix fork on the remote side. */
4587 insert_breakpoints ();
4589 /* Clean up from the last time we were running. */
4590 clear_proceed_status ();
4592 /* Let the remote process run. */
4593 proceed (-1, TARGET_SIGNAL_0, 0);
4597 /* On some machines, e.g. 68k, we may use a different breakpoint instruction
4598 than other targets; in those use REMOTE_BREAKPOINT instead of just
4599 BREAKPOINT. Also, bi-endian targets may define LITTLE_REMOTE_BREAKPOINT
4600 and BIG_REMOTE_BREAKPOINT. If none of these are defined, we just call
4601 the standard routines that are in mem-break.c. */
4603 /* FIXME, these ought to be done in a more dynamic fashion. For instance,
4604 the choice of breakpoint instruction affects target program design and
4605 vice versa, and by making it user-tweakable, the special code here
4606 goes away and we need fewer special GDB configurations. */
4608 #if defined (LITTLE_REMOTE_BREAKPOINT) && defined (BIG_REMOTE_BREAKPOINT) && !defined(REMOTE_BREAKPOINT)
4609 #define REMOTE_BREAKPOINT
4612 #ifdef REMOTE_BREAKPOINT
4614 /* If the target isn't bi-endian, just pretend it is. */
4615 #if !defined (LITTLE_REMOTE_BREAKPOINT) && !defined (BIG_REMOTE_BREAKPOINT)
4616 #define LITTLE_REMOTE_BREAKPOINT REMOTE_BREAKPOINT
4617 #define BIG_REMOTE_BREAKPOINT REMOTE_BREAKPOINT
4620 static unsigned char big_break_insn[] = BIG_REMOTE_BREAKPOINT;
4621 static unsigned char little_break_insn[] = LITTLE_REMOTE_BREAKPOINT;
4623 #endif /* REMOTE_BREAKPOINT */
4625 /* Insert a breakpoint on targets that don't have any better breakpoint
4626 support. We read the contents of the target location and stash it,
4627 then overwrite it with a breakpoint instruction. ADDR is the target
4628 location in the target machine. CONTENTS_CACHE is a pointer to
4629 memory allocated for saving the target contents. It is guaranteed
4630 by the caller to be long enough to save sizeof BREAKPOINT bytes (this
4631 is accomplished via BREAKPOINT_MAX). */
4634 remote_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
4636 struct remote_state *rs = get_remote_state ();
4637 #ifdef REMOTE_BREAKPOINT
4642 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
4643 If it succeeds, then set the support to PACKET_ENABLE. If it
4644 fails, and the user has explicitly requested the Z support then
4645 report an error, otherwise, mark it disabled and go on. */
4647 if (remote_protocol_Z[Z_PACKET_SOFTWARE_BP].support != PACKET_DISABLE)
4649 char *buf = alloca (rs->remote_packet_size);
4652 addr = remote_address_masked (addr);
4656 p += hexnumstr (p, (ULONGEST) addr);
4657 BREAKPOINT_FROM_PC (&addr, &bp_size);
4658 sprintf (p, ",%d", bp_size);
4661 getpkt (buf, (rs->remote_packet_size), 0);
4663 switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_SOFTWARE_BP]))
4669 case PACKET_UNKNOWN:
4674 #ifdef REMOTE_BREAKPOINT
4675 val = target_read_memory (addr, contents_cache, sizeof big_break_insn);
4679 if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
4680 val = target_write_memory (addr, (char *) big_break_insn,
4681 sizeof big_break_insn);
4683 val = target_write_memory (addr, (char *) little_break_insn,
4684 sizeof little_break_insn);
4689 return memory_insert_breakpoint (addr, contents_cache);
4690 #endif /* REMOTE_BREAKPOINT */
4694 remote_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
4696 struct remote_state *rs = get_remote_state ();
4699 if (remote_protocol_Z[Z_PACKET_SOFTWARE_BP].support != PACKET_DISABLE)
4701 char *buf = alloca (rs->remote_packet_size);
4708 addr = remote_address_masked (addr);
4709 p += hexnumstr (p, (ULONGEST) addr);
4710 BREAKPOINT_FROM_PC (&addr, &bp_size);
4711 sprintf (p, ",%d", bp_size);
4714 getpkt (buf, (rs->remote_packet_size), 0);
4716 return (buf[0] == 'E');
4719 #ifdef REMOTE_BREAKPOINT
4720 return target_write_memory (addr, contents_cache, sizeof big_break_insn);
4722 return memory_remove_breakpoint (addr, contents_cache);
4723 #endif /* REMOTE_BREAKPOINT */
4727 watchpoint_to_Z_packet (int type)
4741 internal_error (__FILE__, __LINE__,
4742 "hw_bp_to_z: bad watchpoint type %d", type);
4746 /* FIXME: This function should be static and a member of the remote
4750 remote_insert_watchpoint (CORE_ADDR addr, int len, int type)
4752 struct remote_state *rs = get_remote_state ();
4753 char *buf = alloca (rs->remote_packet_size);
4755 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
4757 if (remote_protocol_Z[packet].support == PACKET_DISABLE)
4758 error ("Can't set hardware watchpoints without the '%s' (%s) packet\n",
4759 remote_protocol_Z[packet].name,
4760 remote_protocol_Z[packet].title);
4762 sprintf (buf, "Z%x,", packet);
4763 p = strchr (buf, '\0');
4764 addr = remote_address_masked (addr);
4765 p += hexnumstr (p, (ULONGEST) addr);
4766 sprintf (p, ",%x", len);
4769 getpkt (buf, (rs->remote_packet_size), 0);
4771 switch (packet_ok (buf, &remote_protocol_Z[packet]))
4774 case PACKET_UNKNOWN:
4779 internal_error (__FILE__, __LINE__,
4780 "remote_insert_watchpoint: reached end of function");
4783 /* FIXME: This function should be static and a member of the remote
4787 remote_remove_watchpoint (CORE_ADDR addr, int len, int type)
4789 struct remote_state *rs = get_remote_state ();
4790 char *buf = alloca (rs->remote_packet_size);
4792 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
4794 if (remote_protocol_Z[packet].support == PACKET_DISABLE)
4795 error ("Can't clear hardware watchpoints without the '%s' (%s) packet\n",
4796 remote_protocol_Z[packet].name,
4797 remote_protocol_Z[packet].title);
4799 sprintf (buf, "z%x,", packet);
4800 p = strchr (buf, '\0');
4801 addr = remote_address_masked (addr);
4802 p += hexnumstr (p, (ULONGEST) addr);
4803 sprintf (p, ",%x", len);
4805 getpkt (buf, (rs->remote_packet_size), 0);
4807 switch (packet_ok (buf, &remote_protocol_Z[packet]))
4810 case PACKET_UNKNOWN:
4815 internal_error (__FILE__, __LINE__,
4816 "remote_remove_watchpoint: reached end of function");
4819 /* FIXME: This function should be static and a member of the remote
4823 remote_insert_hw_breakpoint (CORE_ADDR addr, int len)
4825 struct remote_state *rs = get_remote_state ();
4826 char *buf = alloca (rs->remote_packet_size);
4829 if (remote_protocol_Z[Z_PACKET_HARDWARE_BP].support == PACKET_DISABLE)
4830 error ("Can't set hardware breakpoint without the '%s' (%s) packet\n",
4831 remote_protocol_Z[Z_PACKET_HARDWARE_BP].name,
4832 remote_protocol_Z[Z_PACKET_HARDWARE_BP].title);
4838 addr = remote_address_masked (addr);
4839 p += hexnumstr (p, (ULONGEST) addr);
4840 sprintf (p, ",%x", len);
4843 getpkt (buf, (rs->remote_packet_size), 0);
4845 switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_HARDWARE_BP]))
4848 case PACKET_UNKNOWN:
4853 internal_error (__FILE__, __LINE__,
4854 "remote_remove_watchpoint: reached end of function");
4857 /* FIXME: This function should be static and a member of the remote
4861 remote_remove_hw_breakpoint (CORE_ADDR addr, int len)
4863 struct remote_state *rs = get_remote_state ();
4864 char *buf = alloca (rs->remote_packet_size);
4867 if (remote_protocol_Z[Z_PACKET_HARDWARE_BP].support == PACKET_DISABLE)
4868 error ("Can't clear hardware breakpoint without the '%s' (%s) packet\n",
4869 remote_protocol_Z[Z_PACKET_HARDWARE_BP].name,
4870 remote_protocol_Z[Z_PACKET_HARDWARE_BP].title);
4876 addr = remote_address_masked (addr);
4877 p += hexnumstr (p, (ULONGEST) addr);
4878 sprintf (p, ",%x", len);
4881 getpkt (buf, (rs->remote_packet_size), 0);
4883 switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_HARDWARE_BP]))
4886 case PACKET_UNKNOWN:
4891 internal_error (__FILE__, __LINE__,
4892 "remote_remove_watchpoint: reached end of function");
4895 /* Some targets are only capable of doing downloads, and afterwards
4896 they switch to the remote serial protocol. This function provides
4897 a clean way to get from the download target to the remote target.
4898 It's basically just a wrapper so that we don't have to expose any
4899 of the internal workings of remote.c.
4901 Prior to calling this routine, you should shutdown the current
4902 target code, else you will get the "A program is being debugged
4903 already..." message. Usually a call to pop_target() suffices. */
4906 push_remote_target (char *name, int from_tty)
4908 printf_filtered ("Switching to remote protocol\n");
4909 remote_open (name, from_tty);
4912 /* Other targets want to use the entire remote serial module but with
4913 certain remote_ops overridden. */
4916 open_remote_target (char *name, int from_tty, struct target_ops *target,
4919 printf_filtered ("Selecting the %sremote protocol\n",
4920 (extended_p ? "extended-" : ""));
4921 remote_open_1 (name, from_tty, target, extended_p);
4924 /* Table used by the crc32 function to calcuate the checksum. */
4926 static unsigned long crc32_table[256] =
4929 static unsigned long
4930 crc32 (unsigned char *buf, int len, unsigned int crc)
4932 if (!crc32_table[1])
4934 /* Initialize the CRC table and the decoding table. */
4938 for (i = 0; i < 256; i++)
4940 for (c = i << 24, j = 8; j > 0; --j)
4941 c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
4948 crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255];
4954 /* compare-sections command
4956 With no arguments, compares each loadable section in the exec bfd
4957 with the same memory range on the target, and reports mismatches.
4958 Useful for verifying the image on the target against the exec file.
4959 Depends on the target understanding the new "qCRC:" request. */
4961 /* FIXME: cagney/1999-10-26: This command should be broken down into a
4962 target method (target verify memory) and generic version of the
4963 actual command. This will allow other high-level code (especially
4964 generic_load()) to make use of this target functionality. */
4967 compare_sections_command (char *args, int from_tty)
4969 struct remote_state *rs = get_remote_state ();
4971 unsigned long host_crc, target_crc;
4972 extern bfd *exec_bfd;
4973 struct cleanup *old_chain;
4976 const char *sectname;
4977 char *buf = alloca (rs->remote_packet_size);
4984 error ("command cannot be used without an exec file");
4985 if (!current_target.to_shortname ||
4986 strcmp (current_target.to_shortname, "remote") != 0)
4987 error ("command can only be used with remote target");
4989 for (s = exec_bfd->sections; s; s = s->next)
4991 if (!(s->flags & SEC_LOAD))
4992 continue; /* skip non-loadable section */
4994 size = bfd_get_section_size_before_reloc (s);
4996 continue; /* skip zero-length section */
4998 sectname = bfd_get_section_name (exec_bfd, s);
4999 if (args && strcmp (args, sectname) != 0)
5000 continue; /* not the section selected by user */
5002 matched = 1; /* do this section */
5004 /* FIXME: assumes lma can fit into long */
5005 sprintf (buf, "qCRC:%lx,%lx", (long) lma, (long) size);
5008 /* be clever; compute the host_crc before waiting for target reply */
5009 sectdata = xmalloc (size);
5010 old_chain = make_cleanup (xfree, sectdata);
5011 bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
5012 host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff);
5014 getpkt (buf, (rs->remote_packet_size), 0);
5016 error ("target memory fault, section %s, range 0x%08x -- 0x%08x",
5017 sectname, lma, lma + size);
5019 error ("remote target does not support this operation");
5021 for (target_crc = 0, tmp = &buf[1]; *tmp; tmp++)
5022 target_crc = target_crc * 16 + fromhex (*tmp);
5024 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
5025 sectname, paddr (lma), paddr (lma + size));
5026 if (host_crc == target_crc)
5027 printf_filtered ("matched.\n");
5030 printf_filtered ("MIS-MATCHED!\n");
5034 do_cleanups (old_chain);
5037 warning ("One or more sections of the remote executable does not match\n\
5038 the loaded file\n");
5039 if (args && !matched)
5040 printf_filtered ("No loaded section named '%s'.\n", args);
5044 remote_query (int query_type, char *buf, char *outbuf, int *bufsiz)
5046 struct remote_state *rs = get_remote_state ();
5048 char *buf2 = alloca (rs->remote_packet_size);
5049 char *p2 = &buf2[0];
5052 error ("null pointer to remote bufer size specified");
5054 /* minimum outbuf size is (rs->remote_packet_size) - if bufsiz is not large enough let
5055 the caller know and return what the minimum size is */
5056 /* Note: a zero bufsiz can be used to query the minimum buffer size */
5057 if (*bufsiz < (rs->remote_packet_size))
5059 *bufsiz = (rs->remote_packet_size);
5063 /* except for querying the minimum buffer size, target must be open */
5065 error ("remote query is only available after target open");
5067 /* we only take uppercase letters as query types, at least for now */
5068 if ((query_type < 'A') || (query_type > 'Z'))
5069 error ("invalid remote query type");
5072 error ("null remote query specified");
5075 error ("remote query requires a buffer to receive data");
5082 /* we used one buffer char for the remote protocol q command and another
5083 for the query type. As the remote protocol encapsulation uses 4 chars
5084 plus one extra in case we are debugging (remote_debug),
5085 we have PBUFZIZ - 7 left to pack the query string */
5087 while (buf[i] && (i < ((rs->remote_packet_size) - 8)))
5089 /* bad caller may have sent forbidden characters */
5090 if ((!isprint (buf[i])) || (buf[i] == '$') || (buf[i] == '#'))
5091 error ("illegal characters in query string");
5099 error ("query larger than available buffer");
5105 getpkt (outbuf, *bufsiz, 0);
5111 remote_rcmd (char *command,
5112 struct ui_file *outbuf)
5114 struct remote_state *rs = get_remote_state ();
5116 char *buf = alloca (rs->remote_packet_size);
5120 error ("remote rcmd is only available after target open");
5122 /* Send a NULL command across as an empty command */
5123 if (command == NULL)
5126 /* The query prefix */
5127 strcpy (buf, "qRcmd,");
5128 p = strchr (buf, '\0');
5130 if ((strlen (buf) + strlen (command) * 2 + 8/*misc*/) > (rs->remote_packet_size))
5131 error ("\"monitor\" command ``%s'' is too long\n", command);
5133 /* Encode the actual command */
5134 bin2hex (command, p, 0);
5136 if (putpkt (buf) < 0)
5137 error ("Communication problem with target\n");
5139 /* get/display the response */
5142 /* XXX - see also tracepoint.c:remote_get_noisy_reply() */
5144 getpkt (buf, (rs->remote_packet_size), 0);
5146 error ("Target does not support this command\n");
5147 if (buf[0] == 'O' && buf[1] != 'K')
5149 remote_console_output (buf + 1); /* 'O' message from stub */
5152 if (strcmp (buf, "OK") == 0)
5154 if (strlen (buf) == 3 && buf[0] == 'E'
5155 && isdigit (buf[1]) && isdigit (buf[2]))
5157 error ("Protocol error with Rcmd");
5159 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
5161 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
5162 fputc_unfiltered (c, outbuf);
5169 packet_command (char *args, int from_tty)
5171 struct remote_state *rs = get_remote_state ();
5172 char *buf = alloca (rs->remote_packet_size);
5175 error ("command can only be used with remote target");
5178 error ("remote-packet command requires packet text as argument");
5180 puts_filtered ("sending: ");
5181 print_packet (args);
5182 puts_filtered ("\n");
5185 getpkt (buf, (rs->remote_packet_size), 0);
5186 puts_filtered ("received: ");
5188 puts_filtered ("\n");
5192 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------------- */
5194 static void display_thread_info (struct gdb_ext_thread_info *info);
5196 static void threadset_test_cmd (char *cmd, int tty);
5198 static void threadalive_test (char *cmd, int tty);
5200 static void threadlist_test_cmd (char *cmd, int tty);
5202 int get_and_display_threadinfo (threadref * ref);
5204 static void threadinfo_test_cmd (char *cmd, int tty);
5206 static int thread_display_step (threadref * ref, void *context);
5208 static void threadlist_update_test_cmd (char *cmd, int tty);
5210 static void init_remote_threadtests (void);
5212 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid */
5215 threadset_test_cmd (char *cmd, int tty)
5217 int sample_thread = SAMPLE_THREAD;
5219 printf_filtered ("Remote threadset test\n");
5220 set_thread (sample_thread, 1);
5225 threadalive_test (char *cmd, int tty)
5227 int sample_thread = SAMPLE_THREAD;
5229 if (remote_thread_alive (pid_to_ptid (sample_thread)))
5230 printf_filtered ("PASS: Thread alive test\n");
5232 printf_filtered ("FAIL: Thread alive test\n");
5235 void output_threadid (char *title, threadref * ref);
5238 output_threadid (char *title, threadref *ref)
5242 pack_threadid (&hexid[0], ref); /* Convert threead id into hex */
5244 printf_filtered ("%s %s\n", title, (&hexid[0]));
5248 threadlist_test_cmd (char *cmd, int tty)
5251 threadref nextthread;
5252 int done, result_count;
5253 threadref threadlist[3];
5255 printf_filtered ("Remote Threadlist test\n");
5256 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
5257 &result_count, &threadlist[0]))
5258 printf_filtered ("FAIL: threadlist test\n");
5261 threadref *scan = threadlist;
5262 threadref *limit = scan + result_count;
5264 while (scan < limit)
5265 output_threadid (" thread ", scan++);
5270 display_thread_info (struct gdb_ext_thread_info *info)
5272 output_threadid ("Threadid: ", &info->threadid);
5273 printf_filtered ("Name: %s\n ", info->shortname);
5274 printf_filtered ("State: %s\n", info->display);
5275 printf_filtered ("other: %s\n\n", info->more_display);
5279 get_and_display_threadinfo (threadref *ref)
5283 struct gdb_ext_thread_info threadinfo;
5285 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
5286 | TAG_MOREDISPLAY | TAG_DISPLAY;
5287 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
5288 display_thread_info (&threadinfo);
5293 threadinfo_test_cmd (char *cmd, int tty)
5295 int athread = SAMPLE_THREAD;
5299 int_to_threadref (&thread, athread);
5300 printf_filtered ("Remote Threadinfo test\n");
5301 if (!get_and_display_threadinfo (&thread))
5302 printf_filtered ("FAIL cannot get thread info\n");
5306 thread_display_step (threadref *ref, void *context)
5308 /* output_threadid(" threadstep ",ref); *//* simple test */
5309 return get_and_display_threadinfo (ref);
5313 threadlist_update_test_cmd (char *cmd, int tty)
5315 printf_filtered ("Remote Threadlist update test\n");
5316 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
5320 init_remote_threadtests (void)
5322 add_com ("tlist", class_obscure, threadlist_test_cmd,
5323 "Fetch and print the remote list of thread identifiers, one pkt only");
5324 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
5325 "Fetch and display info about one thread");
5326 add_com ("tset", class_obscure, threadset_test_cmd,
5327 "Test setting to a different thread");
5328 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
5329 "Iterate through updating all remote thread info");
5330 add_com ("talive", class_obscure, threadalive_test,
5331 " Remote thread alive test ");
5336 /* Convert a thread ID to a string. Returns the string in a static
5340 remote_pid_to_str (ptid_t ptid)
5342 static char buf[30];
5344 sprintf (buf, "Thread %d", PIDGET (ptid));
5349 init_remote_ops (void)
5351 remote_ops.to_shortname = "remote";
5352 remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
5354 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5355 Specify the serial device it is connected to\n\
5356 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
5357 remote_ops.to_open = remote_open;
5358 remote_ops.to_close = remote_close;
5359 remote_ops.to_detach = remote_detach;
5360 remote_ops.to_resume = remote_resume;
5361 remote_ops.to_wait = remote_wait;
5362 remote_ops.to_fetch_registers = remote_fetch_registers;
5363 remote_ops.to_store_registers = remote_store_registers;
5364 remote_ops.to_prepare_to_store = remote_prepare_to_store;
5365 remote_ops.to_xfer_memory = remote_xfer_memory;
5366 remote_ops.to_files_info = remote_files_info;
5367 remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
5368 remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
5369 remote_ops.to_kill = remote_kill;
5370 remote_ops.to_load = generic_load;
5371 remote_ops.to_mourn_inferior = remote_mourn;
5372 remote_ops.to_thread_alive = remote_thread_alive;
5373 remote_ops.to_find_new_threads = remote_threads_info;
5374 remote_ops.to_pid_to_str = remote_pid_to_str;
5375 remote_ops.to_extra_thread_info = remote_threads_extra_info;
5376 remote_ops.to_stop = remote_stop;
5377 remote_ops.to_query = remote_query;
5378 remote_ops.to_rcmd = remote_rcmd;
5379 remote_ops.to_stratum = process_stratum;
5380 remote_ops.to_has_all_memory = 1;
5381 remote_ops.to_has_memory = 1;
5382 remote_ops.to_has_stack = 1;
5383 remote_ops.to_has_registers = 1;
5384 remote_ops.to_has_execution = 1;
5385 remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
5386 remote_ops.to_magic = OPS_MAGIC;
5389 /* Set up the extended remote vector by making a copy of the standard
5390 remote vector and adding to it. */
5393 init_extended_remote_ops (void)
5395 extended_remote_ops = remote_ops;
5397 extended_remote_ops.to_shortname = "extended-remote";
5398 extended_remote_ops.to_longname =
5399 "Extended remote serial target in gdb-specific protocol";
5400 extended_remote_ops.to_doc =
5401 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5402 Specify the serial device it is connected to (e.g. /dev/ttya).",
5403 extended_remote_ops.to_open = extended_remote_open;
5404 extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
5405 extended_remote_ops.to_mourn_inferior = extended_remote_mourn;
5409 * Command: info remote-process
5411 * This implements Cisco's version of the "info proc" command.
5413 * This query allows the target stub to return an arbitrary string
5414 * (or strings) giving arbitrary information about the target process.
5415 * This is optional; the target stub isn't required to implement it.
5417 * Syntax: qfProcessInfo request first string
5418 * qsProcessInfo request subsequent string
5419 * reply: 'O'<hex-encoded-string>
5420 * 'l' last reply (empty)
5424 remote_info_process (char *args, int from_tty)
5426 struct remote_state *rs = get_remote_state ();
5427 char *buf = alloca (rs->remote_packet_size);
5429 if (remote_desc == 0)
5430 error ("Command can only be used when connected to the remote target.");
5432 putpkt ("qfProcessInfo");
5433 getpkt (buf, (rs->remote_packet_size), 0);
5435 return; /* Silently: target does not support this feature. */
5438 error ("info proc: target error.");
5440 while (buf[0] == 'O') /* Capitol-O packet */
5442 remote_console_output (&buf[1]);
5443 putpkt ("qsProcessInfo");
5444 getpkt (buf, (rs->remote_packet_size), 0);
5453 remote_cisco_open (char *name, int from_tty)
5456 error ("To open a remote debug connection, you need to specify what \n"
5457 "device is attached to the remote system (e.g. host:port).");
5459 /* See FIXME above */
5460 wait_forever_enabled_p = 1;
5462 target_preopen (from_tty);
5464 unpush_target (&remote_cisco_ops);
5466 remote_desc = serial_open (name);
5468 perror_with_name (name);
5471 * If a baud rate was specified on the gdb command line it will
5472 * be greater than the initial value of -1. If it is, use it otherwise
5476 baud_rate = (baud_rate > 0) ? baud_rate : 9600;
5477 if (serial_setbaudrate (remote_desc, baud_rate))
5479 serial_close (remote_desc);
5480 perror_with_name (name);
5483 serial_raw (remote_desc);
5485 /* If there is something sitting in the buffer we might take it as a
5486 response to a command, which would be bad. */
5487 serial_flush_input (remote_desc);
5491 puts_filtered ("Remote debugging using ");
5492 puts_filtered (name);
5493 puts_filtered ("\n");
5496 remote_cisco_mode = 1;
5498 push_target (&remote_cisco_ops); /* Switch to using cisco target now */
5500 init_all_packet_configs ();
5502 general_thread = -2;
5503 continue_thread = -2;
5505 /* Probe for ability to use "ThreadInfo" query, as required. */
5506 use_threadinfo_query = 1;
5507 use_threadextra_query = 1;
5509 /* Without this, some commands which require an active target (such
5510 as kill) won't work. This variable serves (at least) double duty
5511 as both the pid of the target process (if it has such), and as a
5512 flag indicating that a target is active. These functions should
5513 be split out into seperate variables, especially since GDB will
5514 someday have a notion of debugging several processes. */
5515 inferior_ptid = pid_to_ptid (MAGIC_NULL_PID);
5517 /* Start the remote connection; if error (0), discard this target. */
5519 if (!catch_errors (remote_start_remote_dummy, (char *) 0,
5520 "Couldn't establish connection to remote target\n",
5529 remote_cisco_close (int quitting)
5531 remote_cisco_mode = 0;
5532 remote_close (quitting);
5536 remote_cisco_mourn (void)
5538 remote_mourn_1 (&remote_cisco_ops);
5550 /* Shared between readsocket() and readtty(). The size is arbitrary,
5551 however all targets are known to support a 400 character packet. */
5552 static char tty_input[400];
5554 static int escape_count;
5555 static int echo_check;
5556 extern int quit_flag;
5563 /* Loop until the socket doesn't have any more data */
5565 while ((data = readchar (0)) >= 0)
5567 /* Check for the escape sequence */
5570 /* If this is the fourth escape, get out */
5571 if (++escape_count == 4)
5576 { /* This is a '|', but not the fourth in a row.
5577 Continue without echoing it. If it isn't actually
5578 one of four in a row, it'll be echoed later. */
5585 /* Ensure any pending '|'s are flushed. */
5587 for (; escape_count > 0; escape_count--)
5591 if (data == '\r') /* If this is a return character, */
5592 continue; /* - just supress it. */
5594 if (echo_check != -1) /* Check for echo of user input. */
5596 if (tty_input[echo_check] == data)
5598 gdb_assert (echo_check <= sizeof (tty_input));
5599 echo_check++; /* Character matched user input: */
5600 continue; /* Continue without echoing it. */
5602 else if ((data == '\n') && (tty_input[echo_check] == '\r'))
5603 { /* End of the line (and of echo checking). */
5604 echo_check = -1; /* No more echo supression */
5605 continue; /* Continue without echoing. */
5608 { /* Failed check for echo of user input.
5609 We now have some suppressed output to flush! */
5612 for (j = 0; j < echo_check; j++)
5613 putchar (tty_input[j]);
5617 putchar (data); /* Default case: output the char. */
5620 if (data == SERIAL_TIMEOUT) /* Timeout returned from readchar. */
5621 return READ_MORE; /* Try to read some more */
5623 return FATAL_ERROR; /* Trouble, bail out */
5631 /* First, read a buffer full from the terminal */
5632 tty_bytecount = read (fileno (stdin), tty_input, sizeof (tty_input) - 1);
5633 if (tty_bytecount == -1)
5635 perror ("readtty: read failed");
5639 /* Remove a quoted newline. */
5640 if (tty_input[tty_bytecount - 1] == '\n' &&
5641 tty_input[tty_bytecount - 2] == '\\') /* line ending in backslash */
5643 tty_input[--tty_bytecount] = 0; /* remove newline */
5644 tty_input[--tty_bytecount] = 0; /* remove backslash */
5647 /* Turn trailing newlines into returns */
5648 if (tty_input[tty_bytecount - 1] == '\n')
5649 tty_input[tty_bytecount - 1] = '\r';
5651 /* If the line consists of a ~, enter debugging mode. */
5652 if ((tty_input[0] == '~') && (tty_bytecount == 2))
5655 /* Make this a zero terminated string and write it out */
5656 tty_input[tty_bytecount] = 0;
5657 if (serial_write (remote_desc, tty_input, tty_bytecount))
5659 perror_with_name ("readtty: write failed");
5669 fd_set input; /* file descriptors for select */
5670 int tablesize; /* max number of FDs for select */
5674 extern int escape_count; /* global shared by readsocket */
5675 extern int echo_check; /* ditto */
5680 tablesize = 8 * sizeof (input);
5684 /* Check for anything from our socket - doesn't block. Note that
5685 this must be done *before* the select as there may be
5686 buffered I/O waiting to be processed. */
5688 if ((status = readsocket ()) == FATAL_ERROR)
5690 error ("Debugging terminated by communications error");
5692 else if (status != READ_MORE)
5697 fflush (stdout); /* Flush output before blocking */
5699 /* Now block on more socket input or TTY input */
5702 FD_SET (fileno (stdin), &input);
5703 FD_SET (deprecated_serial_fd (remote_desc), &input);
5705 status = select (tablesize, &input, 0, 0, 0);
5706 if ((status == -1) && (errno != EINTR))
5708 error ("Communications error on select %d", errno);
5711 /* Handle Control-C typed */
5715 if ((++quit_count) == 2)
5717 if (query ("Interrupt GDB? "))
5719 printf_filtered ("Interrupted by user.\n");
5720 return_to_top_level (RETURN_QUIT);
5727 serial_send_break (remote_desc);
5729 serial_write (remote_desc, "\003", 1);
5734 /* Handle console input */
5736 if (FD_ISSET (fileno (stdin), &input))
5740 status = readtty ();
5741 if (status == READ_MORE)
5744 return status; /* telnet session ended */
5750 remote_cisco_wait (ptid_t ptid, struct target_waitstatus *status)
5752 if (minitelnet () != ENTER_DEBUG)
5754 error ("Debugging session terminated by protocol error");
5757 return remote_wait (ptid, status);
5761 init_remote_cisco_ops (void)
5763 remote_cisco_ops.to_shortname = "cisco";
5764 remote_cisco_ops.to_longname = "Remote serial target in cisco-specific protocol";
5765 remote_cisco_ops.to_doc =
5766 "Use a remote machine via TCP, using a cisco-specific protocol.\n\
5767 Specify the serial device it is connected to (e.g. host:2020).";
5768 remote_cisco_ops.to_open = remote_cisco_open;
5769 remote_cisco_ops.to_close = remote_cisco_close;
5770 remote_cisco_ops.to_detach = remote_detach;
5771 remote_cisco_ops.to_resume = remote_resume;
5772 remote_cisco_ops.to_wait = remote_cisco_wait;
5773 remote_cisco_ops.to_fetch_registers = remote_fetch_registers;
5774 remote_cisco_ops.to_store_registers = remote_store_registers;
5775 remote_cisco_ops.to_prepare_to_store = remote_prepare_to_store;
5776 remote_cisco_ops.to_xfer_memory = remote_xfer_memory;
5777 remote_cisco_ops.to_files_info = remote_files_info;
5778 remote_cisco_ops.to_insert_breakpoint = remote_insert_breakpoint;
5779 remote_cisco_ops.to_remove_breakpoint = remote_remove_breakpoint;
5780 remote_cisco_ops.to_kill = remote_kill;
5781 remote_cisco_ops.to_load = generic_load;
5782 remote_cisco_ops.to_mourn_inferior = remote_cisco_mourn;
5783 remote_cisco_ops.to_thread_alive = remote_thread_alive;
5784 remote_cisco_ops.to_find_new_threads = remote_threads_info;
5785 remote_cisco_ops.to_pid_to_str = remote_pid_to_str;
5786 remote_cisco_ops.to_extra_thread_info = remote_threads_extra_info;
5787 remote_cisco_ops.to_stratum = process_stratum;
5788 remote_cisco_ops.to_has_all_memory = 1;
5789 remote_cisco_ops.to_has_memory = 1;
5790 remote_cisco_ops.to_has_stack = 1;
5791 remote_cisco_ops.to_has_registers = 1;
5792 remote_cisco_ops.to_has_execution = 1;
5793 remote_cisco_ops.to_magic = OPS_MAGIC;
5797 remote_can_async_p (void)
5799 /* We're async whenever the serial device is. */
5800 return (current_target.to_async_mask_value) && serial_can_async_p (remote_desc);
5804 remote_is_async_p (void)
5806 /* We're async whenever the serial device is. */
5807 return (current_target.to_async_mask_value) && serial_is_async_p (remote_desc);
5810 /* Pass the SERIAL event on and up to the client. One day this code
5811 will be able to delay notifying the client of an event until the
5812 point where an entire packet has been received. */
5814 static void (*async_client_callback) (enum inferior_event_type event_type, void *context);
5815 static void *async_client_context;
5816 static serial_event_ftype remote_async_serial_handler;
5819 remote_async_serial_handler (struct serial *scb, void *context)
5821 /* Don't propogate error information up to the client. Instead let
5822 the client find out about the error by querying the target. */
5823 async_client_callback (INF_REG_EVENT, async_client_context);
5827 remote_async (void (*callback) (enum inferior_event_type event_type, void *context), void *context)
5829 if (current_target.to_async_mask_value == 0)
5830 internal_error (__FILE__, __LINE__,
5831 "Calling remote_async when async is masked");
5833 if (callback != NULL)
5835 serial_async (remote_desc, remote_async_serial_handler, NULL);
5836 async_client_callback = callback;
5837 async_client_context = context;
5840 serial_async (remote_desc, NULL, NULL);
5843 /* Target async and target extended-async.
5845 This are temporary targets, until it is all tested. Eventually
5846 async support will be incorporated int the usual 'remote'
5850 init_remote_async_ops (void)
5852 remote_async_ops.to_shortname = "async";
5853 remote_async_ops.to_longname = "Remote serial target in async version of the gdb-specific protocol";
5854 remote_async_ops.to_doc =
5855 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5856 Specify the serial device it is connected to (e.g. /dev/ttya).";
5857 remote_async_ops.to_open = remote_async_open;
5858 remote_async_ops.to_close = remote_close;
5859 remote_async_ops.to_detach = remote_async_detach;
5860 remote_async_ops.to_resume = remote_async_resume;
5861 remote_async_ops.to_wait = remote_async_wait;
5862 remote_async_ops.to_fetch_registers = remote_fetch_registers;
5863 remote_async_ops.to_store_registers = remote_store_registers;
5864 remote_async_ops.to_prepare_to_store = remote_prepare_to_store;
5865 remote_async_ops.to_xfer_memory = remote_xfer_memory;
5866 remote_async_ops.to_files_info = remote_files_info;
5867 remote_async_ops.to_insert_breakpoint = remote_insert_breakpoint;
5868 remote_async_ops.to_remove_breakpoint = remote_remove_breakpoint;
5869 remote_async_ops.to_terminal_inferior = remote_async_terminal_inferior;
5870 remote_async_ops.to_terminal_ours = remote_async_terminal_ours;
5871 remote_async_ops.to_kill = remote_async_kill;
5872 remote_async_ops.to_load = generic_load;
5873 remote_async_ops.to_mourn_inferior = remote_async_mourn;
5874 remote_async_ops.to_thread_alive = remote_thread_alive;
5875 remote_async_ops.to_find_new_threads = remote_threads_info;
5876 remote_async_ops.to_pid_to_str = remote_pid_to_str;
5877 remote_async_ops.to_extra_thread_info = remote_threads_extra_info;
5878 remote_async_ops.to_stop = remote_stop;
5879 remote_async_ops.to_query = remote_query;
5880 remote_async_ops.to_rcmd = remote_rcmd;
5881 remote_async_ops.to_stratum = process_stratum;
5882 remote_async_ops.to_has_all_memory = 1;
5883 remote_async_ops.to_has_memory = 1;
5884 remote_async_ops.to_has_stack = 1;
5885 remote_async_ops.to_has_registers = 1;
5886 remote_async_ops.to_has_execution = 1;
5887 remote_async_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
5888 remote_async_ops.to_can_async_p = remote_can_async_p;
5889 remote_async_ops.to_is_async_p = remote_is_async_p;
5890 remote_async_ops.to_async = remote_async;
5891 remote_async_ops.to_async_mask_value = 1;
5892 remote_async_ops.to_magic = OPS_MAGIC;
5895 /* Set up the async extended remote vector by making a copy of the standard
5896 remote vector and adding to it. */
5899 init_extended_async_remote_ops (void)
5901 extended_async_remote_ops = remote_async_ops;
5903 extended_async_remote_ops.to_shortname = "extended-async";
5904 extended_async_remote_ops.to_longname =
5905 "Extended remote serial target in async gdb-specific protocol";
5906 extended_async_remote_ops.to_doc =
5907 "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
5908 Specify the serial device it is connected to (e.g. /dev/ttya).",
5909 extended_async_remote_ops.to_open = extended_remote_async_open;
5910 extended_async_remote_ops.to_create_inferior = extended_remote_async_create_inferior;
5911 extended_async_remote_ops.to_mourn_inferior = extended_remote_mourn;
5915 set_remote_cmd (char *args, int from_tty)
5920 show_remote_cmd (char *args, int from_tty)
5923 show_remote_protocol_Z_packet_cmd (args, from_tty);
5924 show_remote_protocol_e_packet_cmd (args, from_tty);
5925 show_remote_protocol_E_packet_cmd (args, from_tty);
5926 show_remote_protocol_P_packet_cmd (args, from_tty);
5927 show_remote_protocol_qSymbol_packet_cmd (args, from_tty);
5928 show_remote_protocol_binary_download_cmd (args, from_tty);
5932 build_remote_gdbarch_data (void)
5934 remote_address_size = TARGET_ADDR_BIT;
5937 /* Saved pointer to previous owner of the new_objfile event. */
5938 static void (*remote_new_objfile_chain) (struct objfile *);
5940 /* Function to be called whenever a new objfile (shlib) is detected. */
5942 remote_new_objfile (struct objfile *objfile)
5944 if (remote_desc != 0) /* Have a remote connection */
5946 remote_check_symbols (objfile);
5948 /* Call predecessor on chain, if any. */
5949 if (remote_new_objfile_chain != 0 &&
5951 remote_new_objfile_chain (objfile);
5955 _initialize_remote (void)
5957 static struct cmd_list_element *remote_set_cmdlist;
5958 static struct cmd_list_element *remote_show_cmdlist;
5959 struct cmd_list_element *tmpcmd;
5961 /* architecture specific data */
5962 remote_gdbarch_data_handle = register_gdbarch_data (init_remote_state,
5965 /* Old tacky stuff. NOTE: This comes after the remote protocol so
5966 that the remote protocol has been initialized. */
5967 register_gdbarch_swap (&remote_address_size,
5968 sizeof (&remote_address_size), NULL);
5969 register_gdbarch_swap (NULL, 0, build_remote_gdbarch_data);
5972 add_target (&remote_ops);
5974 init_extended_remote_ops ();
5975 add_target (&extended_remote_ops);
5977 init_remote_async_ops ();
5978 add_target (&remote_async_ops);
5980 init_extended_async_remote_ops ();
5981 add_target (&extended_async_remote_ops);
5983 init_remote_cisco_ops ();
5984 add_target (&remote_cisco_ops);
5986 /* Hook into new objfile notification. */
5987 remote_new_objfile_chain = target_new_objfile_hook;
5988 target_new_objfile_hook = remote_new_objfile;
5991 init_remote_threadtests ();
5994 /* set/show remote ... */
5996 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, "\
5997 Remote protocol specific variables\n\
5998 Configure various remote-protocol specific variables such as\n\
5999 the packets being used",
6000 &remote_set_cmdlist, "set remote ",
6001 0/*allow-unknown*/, &setlist);
6002 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, "\
6003 Remote protocol specific variables\n\
6004 Configure various remote-protocol specific variables such as\n\
6005 the packets being used",
6006 &remote_show_cmdlist, "show remote ",
6007 0/*allow-unknown*/, &showlist);
6009 add_cmd ("compare-sections", class_obscure, compare_sections_command,
6010 "Compare section data on target to the exec file.\n\
6011 Argument is a single section name (default: all loaded sections).",
6014 add_cmd ("packet", class_maintenance, packet_command,
6015 "Send an arbitrary packet to a remote target.\n\
6016 maintenance packet TEXT\n\
6017 If GDB is talking to an inferior via the GDB serial protocol, then\n\
6018 this command sends the string TEXT to the inferior, and displays the\n\
6019 response packet. GDB supplies the initial `$' character, and the\n\
6020 terminating `#' character and checksum.",
6024 (add_set_boolean_cmd ("remotebreak", no_class, &remote_break,
6025 "Set whether to send break if interrupted.\n",
6029 /* Install commands for configuring memory read/write packets. */
6031 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size,
6032 "Set the maximum number of bytes per memory write packet (deprecated).\n",
6034 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size,
6035 "Show the maximum number of bytes per memory write packet (deprecated).\n",
6037 add_cmd ("memory-write-packet-size", no_class,
6038 set_memory_write_packet_size,
6039 "Set the maximum number of bytes per memory-write packet.\n"
6040 "Specify the number of bytes in a packet or 0 (zero) for the\n"
6041 "default packet size. The actual limit is further reduced\n"
6042 "dependent on the target. Specify ``fixed'' to disable the\n"
6043 "further restriction and ``limit'' to enable that restriction\n",
6044 &remote_set_cmdlist);
6045 add_cmd ("memory-read-packet-size", no_class,
6046 set_memory_read_packet_size,
6047 "Set the maximum number of bytes per memory-read packet.\n"
6048 "Specify the number of bytes in a packet or 0 (zero) for the\n"
6049 "default packet size. The actual limit is further reduced\n"
6050 "dependent on the target. Specify ``fixed'' to disable the\n"
6051 "further restriction and ``limit'' to enable that restriction\n",
6052 &remote_set_cmdlist);
6053 add_cmd ("memory-write-packet-size", no_class,
6054 show_memory_write_packet_size,
6055 "Show the maximum number of bytes per memory-write packet.\n",
6056 &remote_show_cmdlist);
6057 add_cmd ("memory-read-packet-size", no_class,
6058 show_memory_read_packet_size,
6059 "Show the maximum number of bytes per memory-read packet.\n",
6060 &remote_show_cmdlist);
6063 (add_set_cmd ("remoteaddresssize", class_obscure,
6064 var_integer, (char *) &remote_address_size,
6065 "Set the maximum size of the address (in bits) \
6066 in a memory packet.\n",
6070 add_packet_config_cmd (&remote_protocol_binary_download,
6071 "X", "binary-download",
6072 set_remote_protocol_binary_download_cmd,
6073 show_remote_protocol_binary_download_cmd,
6074 &remote_set_cmdlist, &remote_show_cmdlist,
6077 /* XXXX - should ``set remotebinarydownload'' be retained for
6080 (add_set_cmd ("remotebinarydownload", no_class,
6081 var_boolean, (char *) &remote_binary_download,
6082 "Set binary downloads.\n", &setlist),
6086 add_info ("remote-process", remote_info_process,
6087 "Query the remote system for process info.");
6089 add_packet_config_cmd (&remote_protocol_qSymbol,
6090 "qSymbol", "symbol-lookup",
6091 set_remote_protocol_qSymbol_packet_cmd,
6092 show_remote_protocol_qSymbol_packet_cmd,
6093 &remote_set_cmdlist, &remote_show_cmdlist,
6096 add_packet_config_cmd (&remote_protocol_e,
6097 "e", "step-over-range",
6098 set_remote_protocol_e_packet_cmd,
6099 show_remote_protocol_e_packet_cmd,
6100 &remote_set_cmdlist, &remote_show_cmdlist,
6103 add_packet_config_cmd (&remote_protocol_E,
6104 "E", "step-over-range-w-signal",
6105 set_remote_protocol_E_packet_cmd,
6106 show_remote_protocol_E_packet_cmd,
6107 &remote_set_cmdlist, &remote_show_cmdlist,
6110 add_packet_config_cmd (&remote_protocol_P,
6111 "P", "set-register",
6112 set_remote_protocol_P_packet_cmd,
6113 show_remote_protocol_P_packet_cmd,
6114 &remote_set_cmdlist, &remote_show_cmdlist,
6117 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP],
6118 "Z0", "software-breakpoint",
6119 set_remote_protocol_Z_software_bp_packet_cmd,
6120 show_remote_protocol_Z_software_bp_packet_cmd,
6121 &remote_set_cmdlist, &remote_show_cmdlist,
6124 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_HARDWARE_BP],
6125 "Z1", "hardware-breakpoint",
6126 set_remote_protocol_Z_hardware_bp_packet_cmd,
6127 show_remote_protocol_Z_hardware_bp_packet_cmd,
6128 &remote_set_cmdlist, &remote_show_cmdlist,
6131 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_WRITE_WP],
6132 "Z2", "write-watchpoint",
6133 set_remote_protocol_Z_write_wp_packet_cmd,
6134 show_remote_protocol_Z_write_wp_packet_cmd,
6135 &remote_set_cmdlist, &remote_show_cmdlist,
6138 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_READ_WP],
6139 "Z3", "read-watchpoint",
6140 set_remote_protocol_Z_read_wp_packet_cmd,
6141 show_remote_protocol_Z_read_wp_packet_cmd,
6142 &remote_set_cmdlist, &remote_show_cmdlist,
6145 add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_ACCESS_WP],
6146 "Z4", "access-watchpoint",
6147 set_remote_protocol_Z_access_wp_packet_cmd,
6148 show_remote_protocol_Z_access_wp_packet_cmd,
6149 &remote_set_cmdlist, &remote_show_cmdlist,
6152 /* Keep the old ``set remote Z-packet ...'' working. */
6153 tmpcmd = add_set_auto_boolean_cmd ("Z-packet", class_obscure,
6154 &remote_Z_packet_detect,
6156 Set use of remote protocol `Z' packets", &remote_set_cmdlist);
6157 tmpcmd->function.sfunc = set_remote_protocol_Z_packet_cmd;
6158 add_cmd ("Z-packet", class_obscure, show_remote_protocol_Z_packet_cmd,
6159 "Show use of remote protocol `Z' packets ",
6160 &remote_show_cmdlist);