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[gdb.git] / gdb / remote.c
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1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
4 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 /* See the GDB User Guide for details of the GDB remote protocol. */
24 #include "defs.h"
25 #include "gdb_string.h"
26 #include <ctype.h>
27 #include <fcntl.h>
28 #include "inferior.h"
29 #include "bfd.h"
30 #include "symfile.h"
31 #include "exceptions.h"
32 #include "target.h"
33 /*#include "terminal.h" */
34 #include "gdbcmd.h"
35 #include "objfiles.h"
36 #include "gdb-stabs.h"
37 #include "gdbthread.h"
38 #include "remote.h"
39 #include "regcache.h"
40 #include "value.h"
41 #include "gdb_assert.h"
42 #include "observer.h"
43 #include "solib.h"
44 #include "cli/cli-decode.h"
45 #include "cli/cli-setshow.h"
46 #include "target-descriptions.h"
48 #include <ctype.h>
49 #include <sys/time.h>
51 #include "event-loop.h"
52 #include "event-top.h"
53 #include "inf-loop.h"
55 #include <signal.h>
56 #include "serial.h"
58 #include "gdbcore.h" /* for exec_bfd */
60 #include "remote-fileio.h"
61 #include "gdb/fileio.h"
63 #include "memory-map.h"
65 /* The size to align memory write packets, when practical. The protocol
66 does not guarantee any alignment, and gdb will generate short
67 writes and unaligned writes, but even as a best-effort attempt this
68 can improve bulk transfers. For instance, if a write is misaligned
69 relative to the target's data bus, the stub may need to make an extra
70 round trip fetching data from the target. This doesn't make a
71 huge difference, but it's easy to do, so we try to be helpful.
73 The alignment chosen is arbitrary; usually data bus width is
74 important here, not the possibly larger cache line size. */
75 enum { REMOTE_ALIGN_WRITES = 16 };
77 /* Prototypes for local functions. */
78 static void cleanup_sigint_signal_handler (void *dummy);
79 static void initialize_sigint_signal_handler (void);
80 static int getpkt_sane (char **buf, long *sizeof_buf, int forever);
82 static void handle_remote_sigint (int);
83 static void handle_remote_sigint_twice (int);
84 static void async_remote_interrupt (gdb_client_data);
85 void async_remote_interrupt_twice (gdb_client_data);
87 static void remote_files_info (struct target_ops *ignore);
89 static void remote_prepare_to_store (struct regcache *regcache);
91 static void remote_fetch_registers (struct regcache *regcache, int regno);
93 static void remote_resume (ptid_t ptid, int step,
94 enum target_signal siggnal);
95 static void remote_async_resume (ptid_t ptid, int step,
96 enum target_signal siggnal);
97 static void remote_open (char *name, int from_tty);
98 static void remote_async_open (char *name, int from_tty);
100 static void extended_remote_open (char *name, int from_tty);
101 static void extended_remote_async_open (char *name, int from_tty);
103 static void remote_open_1 (char *, int, struct target_ops *, int extended_p,
104 int async_p);
106 static void remote_close (int quitting);
108 static void remote_store_registers (struct regcache *regcache, int regno);
110 static void remote_mourn (void);
111 static void remote_async_mourn (void);
113 static void extended_remote_restart (void);
115 static void extended_remote_mourn (void);
117 static void remote_mourn_1 (struct target_ops *);
119 static void remote_send (char **buf, long *sizeof_buf_p);
121 static int readchar (int timeout);
123 static ptid_t remote_wait (ptid_t ptid,
124 struct target_waitstatus *status);
125 static ptid_t remote_async_wait (ptid_t ptid,
126 struct target_waitstatus *status);
128 static void remote_kill (void);
129 static void remote_async_kill (void);
131 static int tohex (int nib);
133 static void remote_detach (char *args, int from_tty);
135 static void remote_interrupt (int signo);
137 static void remote_interrupt_twice (int signo);
139 static void interrupt_query (void);
141 static void set_thread (int, int);
143 static int remote_thread_alive (ptid_t);
145 static void get_offsets (void);
147 static void skip_frame (void);
149 static long read_frame (char **buf_p, long *sizeof_buf);
151 static int hexnumlen (ULONGEST num);
153 static void init_remote_ops (void);
155 static void init_extended_remote_ops (void);
157 static void remote_stop (void);
159 static int ishex (int ch, int *val);
161 static int stubhex (int ch);
163 static int hexnumstr (char *, ULONGEST);
165 static int hexnumnstr (char *, ULONGEST, int);
167 static CORE_ADDR remote_address_masked (CORE_ADDR);
169 static void print_packet (char *);
171 static unsigned long crc32 (unsigned char *, int, unsigned int);
173 static void compare_sections_command (char *, int);
175 static void packet_command (char *, int);
177 static int stub_unpack_int (char *buff, int fieldlength);
179 static ptid_t remote_current_thread (ptid_t oldptid);
181 static void remote_find_new_threads (void);
183 static void record_currthread (int currthread);
185 static int fromhex (int a);
187 static int hex2bin (const char *hex, gdb_byte *bin, int count);
189 static int bin2hex (const gdb_byte *bin, char *hex, int count);
191 static int putpkt_binary (char *buf, int cnt);
193 static void check_binary_download (CORE_ADDR addr);
195 struct packet_config;
197 static void show_packet_config_cmd (struct packet_config *config);
199 static void update_packet_config (struct packet_config *config);
201 static void set_remote_protocol_packet_cmd (char *args, int from_tty,
202 struct cmd_list_element *c);
204 static void show_remote_protocol_packet_cmd (struct ui_file *file,
205 int from_tty,
206 struct cmd_list_element *c,
207 const char *value);
209 void _initialize_remote (void);
211 /* For "remote". */
213 static struct cmd_list_element *remote_cmdlist;
215 /* For "set remote" and "show remote". */
217 static struct cmd_list_element *remote_set_cmdlist;
218 static struct cmd_list_element *remote_show_cmdlist;
220 /* Description of the remote protocol state for the currently
221 connected target. This is per-target state, and independent of the
222 selected architecture. */
224 struct remote_state
226 /* A buffer to use for incoming packets, and its current size. The
227 buffer is grown dynamically for larger incoming packets.
228 Outgoing packets may also be constructed in this buffer.
229 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
230 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
231 packets. */
232 char *buf;
233 long buf_size;
235 /* If we negotiated packet size explicitly (and thus can bypass
236 heuristics for the largest packet size that will not overflow
237 a buffer in the stub), this will be set to that packet size.
238 Otherwise zero, meaning to use the guessed size. */
239 long explicit_packet_size;
241 /* remote_wait is normally called when the target is running and
242 waits for a stop reply packet. But sometimes we need to call it
243 when the target is already stopped. We can send a "?" packet
244 and have remote_wait read the response. Or, if we already have
245 the response, we can stash it in BUF and tell remote_wait to
246 skip calling getpkt. This flag is set when BUF contains a
247 stop reply packet and the target is not waiting. */
248 int cached_wait_status;
251 /* This data could be associated with a target, but we do not always
252 have access to the current target when we need it, so for now it is
253 static. This will be fine for as long as only one target is in use
254 at a time. */
255 static struct remote_state remote_state;
257 static struct remote_state *
258 get_remote_state_raw (void)
260 return &remote_state;
263 /* Description of the remote protocol for a given architecture. */
265 struct packet_reg
267 long offset; /* Offset into G packet. */
268 long regnum; /* GDB's internal register number. */
269 LONGEST pnum; /* Remote protocol register number. */
270 int in_g_packet; /* Always part of G packet. */
271 /* long size in bytes; == register_size (current_gdbarch, regnum);
272 at present. */
273 /* char *name; == gdbarch_register_name (current_gdbarch, regnum);
274 at present. */
277 struct remote_arch_state
279 /* Description of the remote protocol registers. */
280 long sizeof_g_packet;
282 /* Description of the remote protocol registers indexed by REGNUM
283 (making an array gdbarch_num_regs in size). */
284 struct packet_reg *regs;
286 /* This is the size (in chars) of the first response to the ``g''
287 packet. It is used as a heuristic when determining the maximum
288 size of memory-read and memory-write packets. A target will
289 typically only reserve a buffer large enough to hold the ``g''
290 packet. The size does not include packet overhead (headers and
291 trailers). */
292 long actual_register_packet_size;
294 /* This is the maximum size (in chars) of a non read/write packet.
295 It is also used as a cap on the size of read/write packets. */
296 long remote_packet_size;
300 /* Handle for retreving the remote protocol data from gdbarch. */
301 static struct gdbarch_data *remote_gdbarch_data_handle;
303 static struct remote_arch_state *
304 get_remote_arch_state (void)
306 return gdbarch_data (current_gdbarch, remote_gdbarch_data_handle);
309 /* Fetch the global remote target state. */
311 static struct remote_state *
312 get_remote_state (void)
314 /* Make sure that the remote architecture state has been
315 initialized, because doing so might reallocate rs->buf. Any
316 function which calls getpkt also needs to be mindful of changes
317 to rs->buf, but this call limits the number of places which run
318 into trouble. */
319 get_remote_arch_state ();
321 return get_remote_state_raw ();
324 static int
325 compare_pnums (const void *lhs_, const void *rhs_)
327 const struct packet_reg * const *lhs = lhs_;
328 const struct packet_reg * const *rhs = rhs_;
330 if ((*lhs)->pnum < (*rhs)->pnum)
331 return -1;
332 else if ((*lhs)->pnum == (*rhs)->pnum)
333 return 0;
334 else
335 return 1;
338 static void *
339 init_remote_state (struct gdbarch *gdbarch)
341 int regnum, num_remote_regs, offset;
342 struct remote_state *rs = get_remote_state_raw ();
343 struct remote_arch_state *rsa;
344 struct packet_reg **remote_regs;
346 rsa = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_arch_state);
348 /* Use the architecture to build a regnum<->pnum table, which will be
349 1:1 unless a feature set specifies otherwise. */
350 rsa->regs = GDBARCH_OBSTACK_CALLOC (gdbarch,
351 gdbarch_num_regs (gdbarch),
352 struct packet_reg);
353 for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++)
355 struct packet_reg *r = &rsa->regs[regnum];
357 if (register_size (gdbarch, regnum) == 0)
358 /* Do not try to fetch zero-sized (placeholder) registers. */
359 r->pnum = -1;
360 else
361 r->pnum = gdbarch_remote_register_number (gdbarch, regnum);
363 r->regnum = regnum;
366 /* Define the g/G packet format as the contents of each register
367 with a remote protocol number, in order of ascending protocol
368 number. */
370 remote_regs = alloca (gdbarch_num_regs (gdbarch)
371 * sizeof (struct packet_reg *));
372 for (num_remote_regs = 0, regnum = 0;
373 regnum < gdbarch_num_regs (gdbarch);
374 regnum++)
375 if (rsa->regs[regnum].pnum != -1)
376 remote_regs[num_remote_regs++] = &rsa->regs[regnum];
378 qsort (remote_regs, num_remote_regs, sizeof (struct packet_reg *),
379 compare_pnums);
381 for (regnum = 0, offset = 0; regnum < num_remote_regs; regnum++)
383 remote_regs[regnum]->in_g_packet = 1;
384 remote_regs[regnum]->offset = offset;
385 offset += register_size (gdbarch, remote_regs[regnum]->regnum);
388 /* Record the maximum possible size of the g packet - it may turn out
389 to be smaller. */
390 rsa->sizeof_g_packet = offset;
392 /* Default maximum number of characters in a packet body. Many
393 remote stubs have a hardwired buffer size of 400 bytes
394 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
395 as the maximum packet-size to ensure that the packet and an extra
396 NUL character can always fit in the buffer. This stops GDB
397 trashing stubs that try to squeeze an extra NUL into what is
398 already a full buffer (As of 1999-12-04 that was most stubs). */
399 rsa->remote_packet_size = 400 - 1;
401 /* This one is filled in when a ``g'' packet is received. */
402 rsa->actual_register_packet_size = 0;
404 /* Should rsa->sizeof_g_packet needs more space than the
405 default, adjust the size accordingly. Remember that each byte is
406 encoded as two characters. 32 is the overhead for the packet
407 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
408 (``$NN:G...#NN'') is a better guess, the below has been padded a
409 little. */
410 if (rsa->sizeof_g_packet > ((rsa->remote_packet_size - 32) / 2))
411 rsa->remote_packet_size = (rsa->sizeof_g_packet * 2 + 32);
413 /* Make sure that the packet buffer is plenty big enough for
414 this architecture. */
415 if (rs->buf_size < rsa->remote_packet_size)
417 rs->buf_size = 2 * rsa->remote_packet_size;
418 rs->buf = xrealloc (rs->buf, rs->buf_size);
421 return rsa;
424 /* Return the current allowed size of a remote packet. This is
425 inferred from the current architecture, and should be used to
426 limit the length of outgoing packets. */
427 static long
428 get_remote_packet_size (void)
430 struct remote_state *rs = get_remote_state ();
431 struct remote_arch_state *rsa = get_remote_arch_state ();
433 if (rs->explicit_packet_size)
434 return rs->explicit_packet_size;
436 return rsa->remote_packet_size;
439 static struct packet_reg *
440 packet_reg_from_regnum (struct remote_arch_state *rsa, long regnum)
442 if (regnum < 0 && regnum >= gdbarch_num_regs (current_gdbarch))
443 return NULL;
444 else
446 struct packet_reg *r = &rsa->regs[regnum];
447 gdb_assert (r->regnum == regnum);
448 return r;
452 static struct packet_reg *
453 packet_reg_from_pnum (struct remote_arch_state *rsa, LONGEST pnum)
455 int i;
456 for (i = 0; i < gdbarch_num_regs (current_gdbarch); i++)
458 struct packet_reg *r = &rsa->regs[i];
459 if (r->pnum == pnum)
460 return r;
462 return NULL;
465 /* FIXME: graces/2002-08-08: These variables should eventually be
466 bound to an instance of the target object (as in gdbarch-tdep()),
467 when such a thing exists. */
469 /* This is set to the data address of the access causing the target
470 to stop for a watchpoint. */
471 static CORE_ADDR remote_watch_data_address;
473 /* This is non-zero if target stopped for a watchpoint. */
474 static int remote_stopped_by_watchpoint_p;
476 static struct target_ops remote_ops;
478 static struct target_ops extended_remote_ops;
480 /* Temporary target ops. Just like the remote_ops and
481 extended_remote_ops, but with asynchronous support. */
482 static struct target_ops remote_async_ops;
484 static struct target_ops extended_async_remote_ops;
486 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
487 ``forever'' still use the normal timeout mechanism. This is
488 currently used by the ASYNC code to guarentee that target reads
489 during the initial connect always time-out. Once getpkt has been
490 modified to return a timeout indication and, in turn
491 remote_wait()/wait_for_inferior() have gained a timeout parameter
492 this can go away. */
493 static int wait_forever_enabled_p = 1;
496 /* This variable chooses whether to send a ^C or a break when the user
497 requests program interruption. Although ^C is usually what remote
498 systems expect, and that is the default here, sometimes a break is
499 preferable instead. */
501 static int remote_break;
503 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
504 remote_open knows that we don't have a file open when the program
505 starts. */
506 static struct serial *remote_desc = NULL;
508 /* This variable sets the number of bits in an address that are to be
509 sent in a memory ("M" or "m") packet. Normally, after stripping
510 leading zeros, the entire address would be sent. This variable
511 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
512 initial implementation of remote.c restricted the address sent in
513 memory packets to ``host::sizeof long'' bytes - (typically 32
514 bits). Consequently, for 64 bit targets, the upper 32 bits of an
515 address was never sent. Since fixing this bug may cause a break in
516 some remote targets this variable is principly provided to
517 facilitate backward compatibility. */
519 static int remote_address_size;
521 /* Tempoary to track who currently owns the terminal. See
522 target_async_terminal_* for more details. */
524 static int remote_async_terminal_ours_p;
526 /* The executable file to use for "run" on the remote side. */
528 static char *remote_exec_file = "";
531 /* User configurable variables for the number of characters in a
532 memory read/write packet. MIN (rsa->remote_packet_size,
533 rsa->sizeof_g_packet) is the default. Some targets need smaller
534 values (fifo overruns, et.al.) and some users need larger values
535 (speed up transfers). The variables ``preferred_*'' (the user
536 request), ``current_*'' (what was actually set) and ``forced_*''
537 (Positive - a soft limit, negative - a hard limit). */
539 struct memory_packet_config
541 char *name;
542 long size;
543 int fixed_p;
546 /* Compute the current size of a read/write packet. Since this makes
547 use of ``actual_register_packet_size'' the computation is dynamic. */
549 static long
550 get_memory_packet_size (struct memory_packet_config *config)
552 struct remote_state *rs = get_remote_state ();
553 struct remote_arch_state *rsa = get_remote_arch_state ();
555 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
556 law?) that some hosts don't cope very well with large alloca()
557 calls. Eventually the alloca() code will be replaced by calls to
558 xmalloc() and make_cleanups() allowing this restriction to either
559 be lifted or removed. */
560 #ifndef MAX_REMOTE_PACKET_SIZE
561 #define MAX_REMOTE_PACKET_SIZE 16384
562 #endif
563 /* NOTE: 20 ensures we can write at least one byte. */
564 #ifndef MIN_REMOTE_PACKET_SIZE
565 #define MIN_REMOTE_PACKET_SIZE 20
566 #endif
567 long what_they_get;
568 if (config->fixed_p)
570 if (config->size <= 0)
571 what_they_get = MAX_REMOTE_PACKET_SIZE;
572 else
573 what_they_get = config->size;
575 else
577 what_they_get = get_remote_packet_size ();
578 /* Limit the packet to the size specified by the user. */
579 if (config->size > 0
580 && what_they_get > config->size)
581 what_they_get = config->size;
583 /* Limit it to the size of the targets ``g'' response unless we have
584 permission from the stub to use a larger packet size. */
585 if (rs->explicit_packet_size == 0
586 && rsa->actual_register_packet_size > 0
587 && what_they_get > rsa->actual_register_packet_size)
588 what_they_get = rsa->actual_register_packet_size;
590 if (what_they_get > MAX_REMOTE_PACKET_SIZE)
591 what_they_get = MAX_REMOTE_PACKET_SIZE;
592 if (what_they_get < MIN_REMOTE_PACKET_SIZE)
593 what_they_get = MIN_REMOTE_PACKET_SIZE;
595 /* Make sure there is room in the global buffer for this packet
596 (including its trailing NUL byte). */
597 if (rs->buf_size < what_they_get + 1)
599 rs->buf_size = 2 * what_they_get;
600 rs->buf = xrealloc (rs->buf, 2 * what_they_get);
603 return what_they_get;
606 /* Update the size of a read/write packet. If they user wants
607 something really big then do a sanity check. */
609 static void
610 set_memory_packet_size (char *args, struct memory_packet_config *config)
612 int fixed_p = config->fixed_p;
613 long size = config->size;
614 if (args == NULL)
615 error (_("Argument required (integer, `fixed' or `limited')."));
616 else if (strcmp (args, "hard") == 0
617 || strcmp (args, "fixed") == 0)
618 fixed_p = 1;
619 else if (strcmp (args, "soft") == 0
620 || strcmp (args, "limit") == 0)
621 fixed_p = 0;
622 else
624 char *end;
625 size = strtoul (args, &end, 0);
626 if (args == end)
627 error (_("Invalid %s (bad syntax)."), config->name);
628 #if 0
629 /* Instead of explicitly capping the size of a packet to
630 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
631 instead allowed to set the size to something arbitrarily
632 large. */
633 if (size > MAX_REMOTE_PACKET_SIZE)
634 error (_("Invalid %s (too large)."), config->name);
635 #endif
637 /* Extra checks? */
638 if (fixed_p && !config->fixed_p)
640 if (! query (_("The target may not be able to correctly handle a %s\n"
641 "of %ld bytes. Change the packet size? "),
642 config->name, size))
643 error (_("Packet size not changed."));
645 /* Update the config. */
646 config->fixed_p = fixed_p;
647 config->size = size;
650 static void
651 show_memory_packet_size (struct memory_packet_config *config)
653 printf_filtered (_("The %s is %ld. "), config->name, config->size);
654 if (config->fixed_p)
655 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
656 get_memory_packet_size (config));
657 else
658 printf_filtered (_("Packets are limited to %ld bytes.\n"),
659 get_memory_packet_size (config));
662 static struct memory_packet_config memory_write_packet_config =
664 "memory-write-packet-size",
667 static void
668 set_memory_write_packet_size (char *args, int from_tty)
670 set_memory_packet_size (args, &memory_write_packet_config);
673 static void
674 show_memory_write_packet_size (char *args, int from_tty)
676 show_memory_packet_size (&memory_write_packet_config);
679 static long
680 get_memory_write_packet_size (void)
682 return get_memory_packet_size (&memory_write_packet_config);
685 static struct memory_packet_config memory_read_packet_config =
687 "memory-read-packet-size",
690 static void
691 set_memory_read_packet_size (char *args, int from_tty)
693 set_memory_packet_size (args, &memory_read_packet_config);
696 static void
697 show_memory_read_packet_size (char *args, int from_tty)
699 show_memory_packet_size (&memory_read_packet_config);
702 static long
703 get_memory_read_packet_size (void)
705 long size = get_memory_packet_size (&memory_read_packet_config);
706 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
707 extra buffer size argument before the memory read size can be
708 increased beyond this. */
709 if (size > get_remote_packet_size ())
710 size = get_remote_packet_size ();
711 return size;
715 /* Generic configuration support for packets the stub optionally
716 supports. Allows the user to specify the use of the packet as well
717 as allowing GDB to auto-detect support in the remote stub. */
719 enum packet_support
721 PACKET_SUPPORT_UNKNOWN = 0,
722 PACKET_ENABLE,
723 PACKET_DISABLE
726 struct packet_config
728 const char *name;
729 const char *title;
730 enum auto_boolean detect;
731 enum packet_support support;
734 /* Analyze a packet's return value and update the packet config
735 accordingly. */
737 enum packet_result
739 PACKET_ERROR,
740 PACKET_OK,
741 PACKET_UNKNOWN
744 static void
745 update_packet_config (struct packet_config *config)
747 switch (config->detect)
749 case AUTO_BOOLEAN_TRUE:
750 config->support = PACKET_ENABLE;
751 break;
752 case AUTO_BOOLEAN_FALSE:
753 config->support = PACKET_DISABLE;
754 break;
755 case AUTO_BOOLEAN_AUTO:
756 config->support = PACKET_SUPPORT_UNKNOWN;
757 break;
761 static void
762 show_packet_config_cmd (struct packet_config *config)
764 char *support = "internal-error";
765 switch (config->support)
767 case PACKET_ENABLE:
768 support = "enabled";
769 break;
770 case PACKET_DISABLE:
771 support = "disabled";
772 break;
773 case PACKET_SUPPORT_UNKNOWN:
774 support = "unknown";
775 break;
777 switch (config->detect)
779 case AUTO_BOOLEAN_AUTO:
780 printf_filtered (_("Support for the `%s' packet is auto-detected, currently %s.\n"),
781 config->name, support);
782 break;
783 case AUTO_BOOLEAN_TRUE:
784 case AUTO_BOOLEAN_FALSE:
785 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
786 config->name, support);
787 break;
791 static void
792 add_packet_config_cmd (struct packet_config *config, const char *name,
793 const char *title, int legacy)
795 char *set_doc;
796 char *show_doc;
797 char *cmd_name;
799 config->name = name;
800 config->title = title;
801 config->detect = AUTO_BOOLEAN_AUTO;
802 config->support = PACKET_SUPPORT_UNKNOWN;
803 set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet",
804 name, title);
805 show_doc = xstrprintf ("Show current use of remote protocol `%s' (%s) packet",
806 name, title);
807 /* set/show TITLE-packet {auto,on,off} */
808 cmd_name = xstrprintf ("%s-packet", title);
809 add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
810 &config->detect, set_doc, show_doc, NULL, /* help_doc */
811 set_remote_protocol_packet_cmd,
812 show_remote_protocol_packet_cmd,
813 &remote_set_cmdlist, &remote_show_cmdlist);
814 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
815 if (legacy)
817 char *legacy_name;
818 legacy_name = xstrprintf ("%s-packet", name);
819 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
820 &remote_set_cmdlist);
821 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
822 &remote_show_cmdlist);
826 static enum packet_result
827 packet_check_result (const char *buf)
829 if (buf[0] != '\0')
831 /* The stub recognized the packet request. Check that the
832 operation succeeded. */
833 if (buf[0] == 'E'
834 && isxdigit (buf[1]) && isxdigit (buf[2])
835 && buf[3] == '\0')
836 /* "Enn" - definitly an error. */
837 return PACKET_ERROR;
839 /* Always treat "E." as an error. This will be used for
840 more verbose error messages, such as E.memtypes. */
841 if (buf[0] == 'E' && buf[1] == '.')
842 return PACKET_ERROR;
844 /* The packet may or may not be OK. Just assume it is. */
845 return PACKET_OK;
847 else
848 /* The stub does not support the packet. */
849 return PACKET_UNKNOWN;
852 static enum packet_result
853 packet_ok (const char *buf, struct packet_config *config)
855 enum packet_result result;
857 result = packet_check_result (buf);
858 switch (result)
860 case PACKET_OK:
861 case PACKET_ERROR:
862 /* The stub recognized the packet request. */
863 switch (config->support)
865 case PACKET_SUPPORT_UNKNOWN:
866 if (remote_debug)
867 fprintf_unfiltered (gdb_stdlog,
868 "Packet %s (%s) is supported\n",
869 config->name, config->title);
870 config->support = PACKET_ENABLE;
871 break;
872 case PACKET_DISABLE:
873 internal_error (__FILE__, __LINE__,
874 _("packet_ok: attempt to use a disabled packet"));
875 break;
876 case PACKET_ENABLE:
877 break;
879 break;
880 case PACKET_UNKNOWN:
881 /* The stub does not support the packet. */
882 switch (config->support)
884 case PACKET_ENABLE:
885 if (config->detect == AUTO_BOOLEAN_AUTO)
886 /* If the stub previously indicated that the packet was
887 supported then there is a protocol error.. */
888 error (_("Protocol error: %s (%s) conflicting enabled responses."),
889 config->name, config->title);
890 else
891 /* The user set it wrong. */
892 error (_("Enabled packet %s (%s) not recognized by stub"),
893 config->name, config->title);
894 break;
895 case PACKET_SUPPORT_UNKNOWN:
896 if (remote_debug)
897 fprintf_unfiltered (gdb_stdlog,
898 "Packet %s (%s) is NOT supported\n",
899 config->name, config->title);
900 config->support = PACKET_DISABLE;
901 break;
902 case PACKET_DISABLE:
903 break;
905 break;
908 return result;
911 enum {
912 PACKET_vCont = 0,
913 PACKET_X,
914 PACKET_qSymbol,
915 PACKET_P,
916 PACKET_p,
917 PACKET_Z0,
918 PACKET_Z1,
919 PACKET_Z2,
920 PACKET_Z3,
921 PACKET_Z4,
922 PACKET_vFile_open,
923 PACKET_vFile_pread,
924 PACKET_vFile_pwrite,
925 PACKET_vFile_close,
926 PACKET_vFile_unlink,
927 PACKET_qXfer_auxv,
928 PACKET_qXfer_features,
929 PACKET_qXfer_libraries,
930 PACKET_qXfer_memory_map,
931 PACKET_qXfer_spu_read,
932 PACKET_qXfer_spu_write,
933 PACKET_qGetTLSAddr,
934 PACKET_qSupported,
935 PACKET_QPassSignals,
936 PACKET_vAttach,
937 PACKET_vRun,
938 PACKET_MAX
941 static struct packet_config remote_protocol_packets[PACKET_MAX];
943 static void
944 set_remote_protocol_packet_cmd (char *args, int from_tty,
945 struct cmd_list_element *c)
947 struct packet_config *packet;
949 for (packet = remote_protocol_packets;
950 packet < &remote_protocol_packets[PACKET_MAX];
951 packet++)
953 if (&packet->detect == c->var)
955 update_packet_config (packet);
956 return;
959 internal_error (__FILE__, __LINE__, "Could not find config for %s",
960 c->name);
963 static void
964 show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty,
965 struct cmd_list_element *c,
966 const char *value)
968 struct packet_config *packet;
970 for (packet = remote_protocol_packets;
971 packet < &remote_protocol_packets[PACKET_MAX];
972 packet++)
974 if (&packet->detect == c->var)
976 show_packet_config_cmd (packet);
977 return;
980 internal_error (__FILE__, __LINE__, "Could not find config for %s",
981 c->name);
984 /* Should we try one of the 'Z' requests? */
986 enum Z_packet_type
988 Z_PACKET_SOFTWARE_BP,
989 Z_PACKET_HARDWARE_BP,
990 Z_PACKET_WRITE_WP,
991 Z_PACKET_READ_WP,
992 Z_PACKET_ACCESS_WP,
993 NR_Z_PACKET_TYPES
996 /* For compatibility with older distributions. Provide a ``set remote
997 Z-packet ...'' command that updates all the Z packet types. */
999 static enum auto_boolean remote_Z_packet_detect;
1001 static void
1002 set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
1003 struct cmd_list_element *c)
1005 int i;
1006 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1008 remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect;
1009 update_packet_config (&remote_protocol_packets[PACKET_Z0 + i]);
1013 static void
1014 show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty,
1015 struct cmd_list_element *c,
1016 const char *value)
1018 int i;
1019 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
1021 show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]);
1025 /* Should we try the 'ThreadInfo' query packet?
1027 This variable (NOT available to the user: auto-detect only!)
1028 determines whether GDB will use the new, simpler "ThreadInfo"
1029 query or the older, more complex syntax for thread queries.
1030 This is an auto-detect variable (set to true at each connect,
1031 and set to false when the target fails to recognize it). */
1033 static int use_threadinfo_query;
1034 static int use_threadextra_query;
1036 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1037 static struct async_signal_handler *sigint_remote_twice_token;
1038 static struct async_signal_handler *sigint_remote_token;
1040 /* These are pointers to hook functions that may be set in order to
1041 modify resume/wait behavior for a particular architecture. */
1043 void (*deprecated_target_resume_hook) (void);
1044 void (*deprecated_target_wait_loop_hook) (void);
1048 /* These are the threads which we last sent to the remote system.
1049 -1 for all or -2 for not sent yet. */
1050 static int general_thread;
1051 static int continue_thread;
1053 /* Call this function as a result of
1054 1) A halt indication (T packet) containing a thread id
1055 2) A direct query of currthread
1056 3) Successful execution of set thread
1059 static void
1060 record_currthread (int currthread)
1062 general_thread = currthread;
1064 /* If this is a new thread, add it to GDB's thread list.
1065 If we leave it up to WFI to do this, bad things will happen. */
1066 if (!in_thread_list (pid_to_ptid (currthread)))
1067 add_thread (pid_to_ptid (currthread));
1070 static char *last_pass_packet;
1072 /* If 'QPassSignals' is supported, tell the remote stub what signals
1073 it can simply pass through to the inferior without reporting. */
1075 static void
1076 remote_pass_signals (void)
1078 if (remote_protocol_packets[PACKET_QPassSignals].support != PACKET_DISABLE)
1080 char *pass_packet, *p;
1081 int numsigs = (int) TARGET_SIGNAL_LAST;
1082 int count = 0, i;
1084 gdb_assert (numsigs < 256);
1085 for (i = 0; i < numsigs; i++)
1087 if (signal_stop_state (i) == 0
1088 && signal_print_state (i) == 0
1089 && signal_pass_state (i) == 1)
1090 count++;
1092 pass_packet = xmalloc (count * 3 + strlen ("QPassSignals:") + 1);
1093 strcpy (pass_packet, "QPassSignals:");
1094 p = pass_packet + strlen (pass_packet);
1095 for (i = 0; i < numsigs; i++)
1097 if (signal_stop_state (i) == 0
1098 && signal_print_state (i) == 0
1099 && signal_pass_state (i) == 1)
1101 if (i >= 16)
1102 *p++ = tohex (i >> 4);
1103 *p++ = tohex (i & 15);
1104 if (count)
1105 *p++ = ';';
1106 else
1107 break;
1108 count--;
1111 *p = 0;
1112 if (!last_pass_packet || strcmp (last_pass_packet, pass_packet))
1114 struct remote_state *rs = get_remote_state ();
1115 char *buf = rs->buf;
1117 putpkt (pass_packet);
1118 getpkt (&rs->buf, &rs->buf_size, 0);
1119 packet_ok (buf, &remote_protocol_packets[PACKET_QPassSignals]);
1120 if (last_pass_packet)
1121 xfree (last_pass_packet);
1122 last_pass_packet = pass_packet;
1124 else
1125 xfree (pass_packet);
1129 #define MAGIC_NULL_PID 42000
1131 static void
1132 set_thread (int th, int gen)
1134 struct remote_state *rs = get_remote_state ();
1135 char *buf = rs->buf;
1136 int state = gen ? general_thread : continue_thread;
1138 if (state == th)
1139 return;
1141 buf[0] = 'H';
1142 buf[1] = gen ? 'g' : 'c';
1143 if (th == MAGIC_NULL_PID)
1145 buf[2] = '0';
1146 buf[3] = '\0';
1148 else if (th < 0)
1149 xsnprintf (&buf[2], get_remote_packet_size () - 2, "-%x", -th);
1150 else
1151 xsnprintf (&buf[2], get_remote_packet_size () - 2, "%x", th);
1152 putpkt (buf);
1153 getpkt (&rs->buf, &rs->buf_size, 0);
1154 if (gen)
1155 general_thread = th;
1156 else
1157 continue_thread = th;
1160 /* Return nonzero if the thread TH is still alive on the remote system. */
1162 static int
1163 remote_thread_alive (ptid_t ptid)
1165 struct remote_state *rs = get_remote_state ();
1166 int tid = PIDGET (ptid);
1168 if (tid < 0)
1169 xsnprintf (rs->buf, get_remote_packet_size (), "T-%08x", -tid);
1170 else
1171 xsnprintf (rs->buf, get_remote_packet_size (), "T%08x", tid);
1172 putpkt (rs->buf);
1173 getpkt (&rs->buf, &rs->buf_size, 0);
1174 return (rs->buf[0] == 'O' && rs->buf[1] == 'K');
1177 /* About these extended threadlist and threadinfo packets. They are
1178 variable length packets but, the fields within them are often fixed
1179 length. They are redundent enough to send over UDP as is the
1180 remote protocol in general. There is a matching unit test module
1181 in libstub. */
1183 #define OPAQUETHREADBYTES 8
1185 /* a 64 bit opaque identifier */
1186 typedef unsigned char threadref[OPAQUETHREADBYTES];
1188 /* WARNING: This threadref data structure comes from the remote O.S.,
1189 libstub protocol encoding, and remote.c. it is not particularly
1190 changable. */
1192 /* Right now, the internal structure is int. We want it to be bigger.
1193 Plan to fix this.
1196 typedef int gdb_threadref; /* Internal GDB thread reference. */
1198 /* gdb_ext_thread_info is an internal GDB data structure which is
1199 equivalent to the reply of the remote threadinfo packet. */
1201 struct gdb_ext_thread_info
1203 threadref threadid; /* External form of thread reference. */
1204 int active; /* Has state interesting to GDB?
1205 regs, stack. */
1206 char display[256]; /* Brief state display, name,
1207 blocked/suspended. */
1208 char shortname[32]; /* To be used to name threads. */
1209 char more_display[256]; /* Long info, statistics, queue depth,
1210 whatever. */
1213 /* The volume of remote transfers can be limited by submitting
1214 a mask containing bits specifying the desired information.
1215 Use a union of these values as the 'selection' parameter to
1216 get_thread_info. FIXME: Make these TAG names more thread specific.
1219 #define TAG_THREADID 1
1220 #define TAG_EXISTS 2
1221 #define TAG_DISPLAY 4
1222 #define TAG_THREADNAME 8
1223 #define TAG_MOREDISPLAY 16
1225 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1227 char *unpack_varlen_hex (char *buff, ULONGEST *result);
1229 static char *unpack_nibble (char *buf, int *val);
1231 static char *pack_nibble (char *buf, int nibble);
1233 static char *pack_hex_byte (char *pkt, int /* unsigned char */ byte);
1235 static char *unpack_byte (char *buf, int *value);
1237 static char *pack_int (char *buf, int value);
1239 static char *unpack_int (char *buf, int *value);
1241 static char *unpack_string (char *src, char *dest, int length);
1243 static char *pack_threadid (char *pkt, threadref *id);
1245 static char *unpack_threadid (char *inbuf, threadref *id);
1247 void int_to_threadref (threadref *id, int value);
1249 static int threadref_to_int (threadref *ref);
1251 static void copy_threadref (threadref *dest, threadref *src);
1253 static int threadmatch (threadref *dest, threadref *src);
1255 static char *pack_threadinfo_request (char *pkt, int mode,
1256 threadref *id);
1258 static int remote_unpack_thread_info_response (char *pkt,
1259 threadref *expectedref,
1260 struct gdb_ext_thread_info
1261 *info);
1264 static int remote_get_threadinfo (threadref *threadid,
1265 int fieldset, /*TAG mask */
1266 struct gdb_ext_thread_info *info);
1268 static char *pack_threadlist_request (char *pkt, int startflag,
1269 int threadcount,
1270 threadref *nextthread);
1272 static int parse_threadlist_response (char *pkt,
1273 int result_limit,
1274 threadref *original_echo,
1275 threadref *resultlist,
1276 int *doneflag);
1278 static int remote_get_threadlist (int startflag,
1279 threadref *nextthread,
1280 int result_limit,
1281 int *done,
1282 int *result_count,
1283 threadref *threadlist);
1285 typedef int (*rmt_thread_action) (threadref *ref, void *context);
1287 static int remote_threadlist_iterator (rmt_thread_action stepfunction,
1288 void *context, int looplimit);
1290 static int remote_newthread_step (threadref *ref, void *context);
1292 /* Encode 64 bits in 16 chars of hex. */
1294 static const char hexchars[] = "0123456789abcdef";
1296 static int
1297 ishex (int ch, int *val)
1299 if ((ch >= 'a') && (ch <= 'f'))
1301 *val = ch - 'a' + 10;
1302 return 1;
1304 if ((ch >= 'A') && (ch <= 'F'))
1306 *val = ch - 'A' + 10;
1307 return 1;
1309 if ((ch >= '0') && (ch <= '9'))
1311 *val = ch - '0';
1312 return 1;
1314 return 0;
1317 static int
1318 stubhex (int ch)
1320 if (ch >= 'a' && ch <= 'f')
1321 return ch - 'a' + 10;
1322 if (ch >= '0' && ch <= '9')
1323 return ch - '0';
1324 if (ch >= 'A' && ch <= 'F')
1325 return ch - 'A' + 10;
1326 return -1;
1329 static int
1330 stub_unpack_int (char *buff, int fieldlength)
1332 int nibble;
1333 int retval = 0;
1335 while (fieldlength)
1337 nibble = stubhex (*buff++);
1338 retval |= nibble;
1339 fieldlength--;
1340 if (fieldlength)
1341 retval = retval << 4;
1343 return retval;
1346 char *
1347 unpack_varlen_hex (char *buff, /* packet to parse */
1348 ULONGEST *result)
1350 int nibble;
1351 ULONGEST retval = 0;
1353 while (ishex (*buff, &nibble))
1355 buff++;
1356 retval = retval << 4;
1357 retval |= nibble & 0x0f;
1359 *result = retval;
1360 return buff;
1363 static char *
1364 unpack_nibble (char *buf, int *val)
1366 *val = fromhex (*buf++);
1367 return buf;
1370 static char *
1371 pack_nibble (char *buf, int nibble)
1373 *buf++ = hexchars[(nibble & 0x0f)];
1374 return buf;
1377 static char *
1378 pack_hex_byte (char *pkt, int byte)
1380 *pkt++ = hexchars[(byte >> 4) & 0xf];
1381 *pkt++ = hexchars[(byte & 0xf)];
1382 return pkt;
1385 static char *
1386 unpack_byte (char *buf, int *value)
1388 *value = stub_unpack_int (buf, 2);
1389 return buf + 2;
1392 static char *
1393 pack_int (char *buf, int value)
1395 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
1396 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
1397 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
1398 buf = pack_hex_byte (buf, (value & 0xff));
1399 return buf;
1402 static char *
1403 unpack_int (char *buf, int *value)
1405 *value = stub_unpack_int (buf, 8);
1406 return buf + 8;
1409 #if 0 /* Currently unused, uncomment when needed. */
1410 static char *pack_string (char *pkt, char *string);
1412 static char *
1413 pack_string (char *pkt, char *string)
1415 char ch;
1416 int len;
1418 len = strlen (string);
1419 if (len > 200)
1420 len = 200; /* Bigger than most GDB packets, junk??? */
1421 pkt = pack_hex_byte (pkt, len);
1422 while (len-- > 0)
1424 ch = *string++;
1425 if ((ch == '\0') || (ch == '#'))
1426 ch = '*'; /* Protect encapsulation. */
1427 *pkt++ = ch;
1429 return pkt;
1431 #endif /* 0 (unused) */
1433 static char *
1434 unpack_string (char *src, char *dest, int length)
1436 while (length--)
1437 *dest++ = *src++;
1438 *dest = '\0';
1439 return src;
1442 static char *
1443 pack_threadid (char *pkt, threadref *id)
1445 char *limit;
1446 unsigned char *altid;
1448 altid = (unsigned char *) id;
1449 limit = pkt + BUF_THREAD_ID_SIZE;
1450 while (pkt < limit)
1451 pkt = pack_hex_byte (pkt, *altid++);
1452 return pkt;
1456 static char *
1457 unpack_threadid (char *inbuf, threadref *id)
1459 char *altref;
1460 char *limit = inbuf + BUF_THREAD_ID_SIZE;
1461 int x, y;
1463 altref = (char *) id;
1465 while (inbuf < limit)
1467 x = stubhex (*inbuf++);
1468 y = stubhex (*inbuf++);
1469 *altref++ = (x << 4) | y;
1471 return inbuf;
1474 /* Externally, threadrefs are 64 bits but internally, they are still
1475 ints. This is due to a mismatch of specifications. We would like
1476 to use 64bit thread references internally. This is an adapter
1477 function. */
1479 void
1480 int_to_threadref (threadref *id, int value)
1482 unsigned char *scan;
1484 scan = (unsigned char *) id;
1486 int i = 4;
1487 while (i--)
1488 *scan++ = 0;
1490 *scan++ = (value >> 24) & 0xff;
1491 *scan++ = (value >> 16) & 0xff;
1492 *scan++ = (value >> 8) & 0xff;
1493 *scan++ = (value & 0xff);
1496 static int
1497 threadref_to_int (threadref *ref)
1499 int i, value = 0;
1500 unsigned char *scan;
1502 scan = *ref;
1503 scan += 4;
1504 i = 4;
1505 while (i-- > 0)
1506 value = (value << 8) | ((*scan++) & 0xff);
1507 return value;
1510 static void
1511 copy_threadref (threadref *dest, threadref *src)
1513 int i;
1514 unsigned char *csrc, *cdest;
1516 csrc = (unsigned char *) src;
1517 cdest = (unsigned char *) dest;
1518 i = 8;
1519 while (i--)
1520 *cdest++ = *csrc++;
1523 static int
1524 threadmatch (threadref *dest, threadref *src)
1526 /* Things are broken right now, so just assume we got a match. */
1527 #if 0
1528 unsigned char *srcp, *destp;
1529 int i, result;
1530 srcp = (char *) src;
1531 destp = (char *) dest;
1533 result = 1;
1534 while (i-- > 0)
1535 result &= (*srcp++ == *destp++) ? 1 : 0;
1536 return result;
1537 #endif
1538 return 1;
1542 threadid:1, # always request threadid
1543 context_exists:2,
1544 display:4,
1545 unique_name:8,
1546 more_display:16
1549 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1551 static char *
1552 pack_threadinfo_request (char *pkt, int mode, threadref *id)
1554 *pkt++ = 'q'; /* Info Query */
1555 *pkt++ = 'P'; /* process or thread info */
1556 pkt = pack_int (pkt, mode); /* mode */
1557 pkt = pack_threadid (pkt, id); /* threadid */
1558 *pkt = '\0'; /* terminate */
1559 return pkt;
1562 /* These values tag the fields in a thread info response packet. */
1563 /* Tagging the fields allows us to request specific fields and to
1564 add more fields as time goes by. */
1566 #define TAG_THREADID 1 /* Echo the thread identifier. */
1567 #define TAG_EXISTS 2 /* Is this process defined enough to
1568 fetch registers and its stack? */
1569 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1570 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
1571 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1572 the process. */
1574 static int
1575 remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
1576 struct gdb_ext_thread_info *info)
1578 struct remote_state *rs = get_remote_state ();
1579 int mask, length;
1580 int tag;
1581 threadref ref;
1582 char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */
1583 int retval = 1;
1585 /* info->threadid = 0; FIXME: implement zero_threadref. */
1586 info->active = 0;
1587 info->display[0] = '\0';
1588 info->shortname[0] = '\0';
1589 info->more_display[0] = '\0';
1591 /* Assume the characters indicating the packet type have been
1592 stripped. */
1593 pkt = unpack_int (pkt, &mask); /* arg mask */
1594 pkt = unpack_threadid (pkt, &ref);
1596 if (mask == 0)
1597 warning (_("Incomplete response to threadinfo request."));
1598 if (!threadmatch (&ref, expectedref))
1599 { /* This is an answer to a different request. */
1600 warning (_("ERROR RMT Thread info mismatch."));
1601 return 0;
1603 copy_threadref (&info->threadid, &ref);
1605 /* Loop on tagged fields , try to bail if somthing goes wrong. */
1607 /* Packets are terminated with nulls. */
1608 while ((pkt < limit) && mask && *pkt)
1610 pkt = unpack_int (pkt, &tag); /* tag */
1611 pkt = unpack_byte (pkt, &length); /* length */
1612 if (!(tag & mask)) /* Tags out of synch with mask. */
1614 warning (_("ERROR RMT: threadinfo tag mismatch."));
1615 retval = 0;
1616 break;
1618 if (tag == TAG_THREADID)
1620 if (length != 16)
1622 warning (_("ERROR RMT: length of threadid is not 16."));
1623 retval = 0;
1624 break;
1626 pkt = unpack_threadid (pkt, &ref);
1627 mask = mask & ~TAG_THREADID;
1628 continue;
1630 if (tag == TAG_EXISTS)
1632 info->active = stub_unpack_int (pkt, length);
1633 pkt += length;
1634 mask = mask & ~(TAG_EXISTS);
1635 if (length > 8)
1637 warning (_("ERROR RMT: 'exists' length too long."));
1638 retval = 0;
1639 break;
1641 continue;
1643 if (tag == TAG_THREADNAME)
1645 pkt = unpack_string (pkt, &info->shortname[0], length);
1646 mask = mask & ~TAG_THREADNAME;
1647 continue;
1649 if (tag == TAG_DISPLAY)
1651 pkt = unpack_string (pkt, &info->display[0], length);
1652 mask = mask & ~TAG_DISPLAY;
1653 continue;
1655 if (tag == TAG_MOREDISPLAY)
1657 pkt = unpack_string (pkt, &info->more_display[0], length);
1658 mask = mask & ~TAG_MOREDISPLAY;
1659 continue;
1661 warning (_("ERROR RMT: unknown thread info tag."));
1662 break; /* Not a tag we know about. */
1664 return retval;
1667 static int
1668 remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
1669 struct gdb_ext_thread_info *info)
1671 struct remote_state *rs = get_remote_state ();
1672 int result;
1674 pack_threadinfo_request (rs->buf, fieldset, threadid);
1675 putpkt (rs->buf);
1676 getpkt (&rs->buf, &rs->buf_size, 0);
1677 result = remote_unpack_thread_info_response (rs->buf + 2,
1678 threadid, info);
1679 return result;
1682 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1684 static char *
1685 pack_threadlist_request (char *pkt, int startflag, int threadcount,
1686 threadref *nextthread)
1688 *pkt++ = 'q'; /* info query packet */
1689 *pkt++ = 'L'; /* Process LIST or threadLIST request */
1690 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
1691 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
1692 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
1693 *pkt = '\0';
1694 return pkt;
1697 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1699 static int
1700 parse_threadlist_response (char *pkt, int result_limit,
1701 threadref *original_echo, threadref *resultlist,
1702 int *doneflag)
1704 struct remote_state *rs = get_remote_state ();
1705 char *limit;
1706 int count, resultcount, done;
1708 resultcount = 0;
1709 /* Assume the 'q' and 'M chars have been stripped. */
1710 limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE);
1711 /* done parse past here */
1712 pkt = unpack_byte (pkt, &count); /* count field */
1713 pkt = unpack_nibble (pkt, &done);
1714 /* The first threadid is the argument threadid. */
1715 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
1716 while ((count-- > 0) && (pkt < limit))
1718 pkt = unpack_threadid (pkt, resultlist++);
1719 if (resultcount++ >= result_limit)
1720 break;
1722 if (doneflag)
1723 *doneflag = done;
1724 return resultcount;
1727 static int
1728 remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
1729 int *done, int *result_count, threadref *threadlist)
1731 struct remote_state *rs = get_remote_state ();
1732 static threadref echo_nextthread;
1733 int result = 1;
1735 /* Trancate result limit to be smaller than the packet size. */
1736 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= get_remote_packet_size ())
1737 result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2;
1739 pack_threadlist_request (rs->buf, startflag, result_limit, nextthread);
1740 putpkt (rs->buf);
1741 getpkt (&rs->buf, &rs->buf_size, 0);
1743 *result_count =
1744 parse_threadlist_response (rs->buf + 2, result_limit, &echo_nextthread,
1745 threadlist, done);
1747 if (!threadmatch (&echo_nextthread, nextthread))
1749 /* FIXME: This is a good reason to drop the packet. */
1750 /* Possably, there is a duplicate response. */
1751 /* Possabilities :
1752 retransmit immediatly - race conditions
1753 retransmit after timeout - yes
1754 exit
1755 wait for packet, then exit
1757 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
1758 return 0; /* I choose simply exiting. */
1760 if (*result_count <= 0)
1762 if (*done != 1)
1764 warning (_("RMT ERROR : failed to get remote thread list."));
1765 result = 0;
1767 return result; /* break; */
1769 if (*result_count > result_limit)
1771 *result_count = 0;
1772 warning (_("RMT ERROR: threadlist response longer than requested."));
1773 return 0;
1775 return result;
1778 /* This is the interface between remote and threads, remotes upper
1779 interface. */
1781 /* remote_find_new_threads retrieves the thread list and for each
1782 thread in the list, looks up the thread in GDB's internal list,
1783 ading the thread if it does not already exist. This involves
1784 getting partial thread lists from the remote target so, polling the
1785 quit_flag is required. */
1788 /* About this many threadisds fit in a packet. */
1790 #define MAXTHREADLISTRESULTS 32
1792 static int
1793 remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
1794 int looplimit)
1796 int done, i, result_count;
1797 int startflag = 1;
1798 int result = 1;
1799 int loopcount = 0;
1800 static threadref nextthread;
1801 static threadref resultthreadlist[MAXTHREADLISTRESULTS];
1803 done = 0;
1804 while (!done)
1806 if (loopcount++ > looplimit)
1808 result = 0;
1809 warning (_("Remote fetch threadlist -infinite loop-."));
1810 break;
1812 if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS,
1813 &done, &result_count, resultthreadlist))
1815 result = 0;
1816 break;
1818 /* Clear for later iterations. */
1819 startflag = 0;
1820 /* Setup to resume next batch of thread references, set nextthread. */
1821 if (result_count >= 1)
1822 copy_threadref (&nextthread, &resultthreadlist[result_count - 1]);
1823 i = 0;
1824 while (result_count--)
1825 if (!(result = (*stepfunction) (&resultthreadlist[i++], context)))
1826 break;
1828 return result;
1831 static int
1832 remote_newthread_step (threadref *ref, void *context)
1834 ptid_t ptid;
1836 ptid = pid_to_ptid (threadref_to_int (ref));
1838 if (!in_thread_list (ptid))
1839 add_thread (ptid);
1840 return 1; /* continue iterator */
1843 #define CRAZY_MAX_THREADS 1000
1845 static ptid_t
1846 remote_current_thread (ptid_t oldpid)
1848 struct remote_state *rs = get_remote_state ();
1850 putpkt ("qC");
1851 getpkt (&rs->buf, &rs->buf_size, 0);
1852 if (rs->buf[0] == 'Q' && rs->buf[1] == 'C')
1853 /* Use strtoul here, so we'll correctly parse values whose highest
1854 bit is set. The protocol carries them as a simple series of
1855 hex digits; in the absence of a sign, strtol will see such
1856 values as positive numbers out of range for signed 'long', and
1857 return LONG_MAX to indicate an overflow. */
1858 return pid_to_ptid (strtoul (&rs->buf[2], NULL, 16));
1859 else
1860 return oldpid;
1863 /* Find new threads for info threads command.
1864 * Original version, using John Metzler's thread protocol.
1867 static void
1868 remote_find_new_threads (void)
1870 remote_threadlist_iterator (remote_newthread_step, 0,
1871 CRAZY_MAX_THREADS);
1872 if (PIDGET (inferior_ptid) == MAGIC_NULL_PID) /* ack ack ack */
1873 inferior_ptid = remote_current_thread (inferior_ptid);
1877 * Find all threads for info threads command.
1878 * Uses new thread protocol contributed by Cisco.
1879 * Falls back and attempts to use the older method (above)
1880 * if the target doesn't respond to the new method.
1883 static void
1884 remote_threads_info (void)
1886 struct remote_state *rs = get_remote_state ();
1887 char *bufp;
1888 int tid;
1890 if (remote_desc == 0) /* paranoia */
1891 error (_("Command can only be used when connected to the remote target."));
1893 if (use_threadinfo_query)
1895 putpkt ("qfThreadInfo");
1896 getpkt (&rs->buf, &rs->buf_size, 0);
1897 bufp = rs->buf;
1898 if (bufp[0] != '\0') /* q packet recognized */
1900 while (*bufp++ == 'm') /* reply contains one or more TID */
1904 /* Use strtoul here, so we'll correctly parse values
1905 whose highest bit is set. The protocol carries
1906 them as a simple series of hex digits; in the
1907 absence of a sign, strtol will see such values as
1908 positive numbers out of range for signed 'long',
1909 and return LONG_MAX to indicate an overflow. */
1910 tid = strtoul (bufp, &bufp, 16);
1911 if (tid != 0 && !in_thread_list (pid_to_ptid (tid)))
1912 add_thread (pid_to_ptid (tid));
1914 while (*bufp++ == ','); /* comma-separated list */
1915 putpkt ("qsThreadInfo");
1916 getpkt (&rs->buf, &rs->buf_size, 0);
1917 bufp = rs->buf;
1919 return; /* done */
1923 /* Else fall back to old method based on jmetzler protocol. */
1924 use_threadinfo_query = 0;
1925 remote_find_new_threads ();
1926 return;
1930 * Collect a descriptive string about the given thread.
1931 * The target may say anything it wants to about the thread
1932 * (typically info about its blocked / runnable state, name, etc.).
1933 * This string will appear in the info threads display.
1935 * Optional: targets are not required to implement this function.
1938 static char *
1939 remote_threads_extra_info (struct thread_info *tp)
1941 struct remote_state *rs = get_remote_state ();
1942 int result;
1943 int set;
1944 threadref id;
1945 struct gdb_ext_thread_info threadinfo;
1946 static char display_buf[100]; /* arbitrary... */
1947 int n = 0; /* position in display_buf */
1949 if (remote_desc == 0) /* paranoia */
1950 internal_error (__FILE__, __LINE__,
1951 _("remote_threads_extra_info"));
1953 if (use_threadextra_query)
1955 xsnprintf (rs->buf, get_remote_packet_size (), "qThreadExtraInfo,%x",
1956 PIDGET (tp->ptid));
1957 putpkt (rs->buf);
1958 getpkt (&rs->buf, &rs->buf_size, 0);
1959 if (rs->buf[0] != 0)
1961 n = min (strlen (rs->buf) / 2, sizeof (display_buf));
1962 result = hex2bin (rs->buf, (gdb_byte *) display_buf, n);
1963 display_buf [result] = '\0';
1964 return display_buf;
1968 /* If the above query fails, fall back to the old method. */
1969 use_threadextra_query = 0;
1970 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
1971 | TAG_MOREDISPLAY | TAG_DISPLAY;
1972 int_to_threadref (&id, PIDGET (tp->ptid));
1973 if (remote_get_threadinfo (&id, set, &threadinfo))
1974 if (threadinfo.active)
1976 if (*threadinfo.shortname)
1977 n += xsnprintf (&display_buf[0], sizeof (display_buf) - n,
1978 " Name: %s,", threadinfo.shortname);
1979 if (*threadinfo.display)
1980 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
1981 " State: %s,", threadinfo.display);
1982 if (*threadinfo.more_display)
1983 n += xsnprintf (&display_buf[n], sizeof (display_buf) - n,
1984 " Priority: %s", threadinfo.more_display);
1986 if (n > 0)
1988 /* For purely cosmetic reasons, clear up trailing commas. */
1989 if (',' == display_buf[n-1])
1990 display_buf[n-1] = ' ';
1991 return display_buf;
1994 return NULL;
1998 /* Restart the remote side; this is an extended protocol operation. */
2000 static void
2001 extended_remote_restart (void)
2003 struct remote_state *rs = get_remote_state ();
2005 /* Send the restart command; for reasons I don't understand the
2006 remote side really expects a number after the "R". */
2007 xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0);
2008 putpkt (rs->buf);
2010 remote_fileio_reset ();
2013 /* Clean up connection to a remote debugger. */
2015 static void
2016 remote_close (int quitting)
2018 if (remote_desc)
2019 serial_close (remote_desc);
2020 remote_desc = NULL;
2023 /* Query the remote side for the text, data and bss offsets. */
2025 static void
2026 get_offsets (void)
2028 struct remote_state *rs = get_remote_state ();
2029 char *buf;
2030 char *ptr;
2031 int lose, num_segments = 0, do_sections, do_segments;
2032 CORE_ADDR text_addr, data_addr, bss_addr, segments[2];
2033 struct section_offsets *offs;
2034 struct symfile_segment_data *data;
2036 if (symfile_objfile == NULL)
2037 return;
2039 putpkt ("qOffsets");
2040 getpkt (&rs->buf, &rs->buf_size, 0);
2041 buf = rs->buf;
2043 if (buf[0] == '\000')
2044 return; /* Return silently. Stub doesn't support
2045 this command. */
2046 if (buf[0] == 'E')
2048 warning (_("Remote failure reply: %s"), buf);
2049 return;
2052 /* Pick up each field in turn. This used to be done with scanf, but
2053 scanf will make trouble if CORE_ADDR size doesn't match
2054 conversion directives correctly. The following code will work
2055 with any size of CORE_ADDR. */
2056 text_addr = data_addr = bss_addr = 0;
2057 ptr = buf;
2058 lose = 0;
2060 if (strncmp (ptr, "Text=", 5) == 0)
2062 ptr += 5;
2063 /* Don't use strtol, could lose on big values. */
2064 while (*ptr && *ptr != ';')
2065 text_addr = (text_addr << 4) + fromhex (*ptr++);
2067 if (strncmp (ptr, ";Data=", 6) == 0)
2069 ptr += 6;
2070 while (*ptr && *ptr != ';')
2071 data_addr = (data_addr << 4) + fromhex (*ptr++);
2073 else
2074 lose = 1;
2076 if (!lose && strncmp (ptr, ";Bss=", 5) == 0)
2078 ptr += 5;
2079 while (*ptr && *ptr != ';')
2080 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
2082 if (bss_addr != data_addr)
2083 warning (_("Target reported unsupported offsets: %s"), buf);
2085 else
2086 lose = 1;
2088 else if (strncmp (ptr, "TextSeg=", 8) == 0)
2090 ptr += 8;
2091 /* Don't use strtol, could lose on big values. */
2092 while (*ptr && *ptr != ';')
2093 text_addr = (text_addr << 4) + fromhex (*ptr++);
2094 num_segments = 1;
2096 if (strncmp (ptr, ";DataSeg=", 9) == 0)
2098 ptr += 9;
2099 while (*ptr && *ptr != ';')
2100 data_addr = (data_addr << 4) + fromhex (*ptr++);
2101 num_segments++;
2104 else
2105 lose = 1;
2107 if (lose)
2108 error (_("Malformed response to offset query, %s"), buf);
2109 else if (*ptr != '\0')
2110 warning (_("Target reported unsupported offsets: %s"), buf);
2112 offs = ((struct section_offsets *)
2113 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
2114 memcpy (offs, symfile_objfile->section_offsets,
2115 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
2117 data = get_symfile_segment_data (symfile_objfile->obfd);
2118 do_segments = (data != NULL);
2119 do_sections = num_segments == 0;
2121 if (num_segments > 0)
2123 segments[0] = text_addr;
2124 segments[1] = data_addr;
2126 /* If we have two segments, we can still try to relocate everything
2127 by assuming that the .text and .data offsets apply to the whole
2128 text and data segments. Convert the offsets given in the packet
2129 to base addresses for symfile_map_offsets_to_segments. */
2130 else if (data && data->num_segments == 2)
2132 segments[0] = data->segment_bases[0] + text_addr;
2133 segments[1] = data->segment_bases[1] + data_addr;
2134 num_segments = 2;
2136 /* There's no way to relocate by segment. */
2137 else
2138 do_segments = 0;
2140 if (do_segments)
2142 int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data,
2143 offs, num_segments, segments);
2145 if (ret == 0 && !do_sections)
2146 error (_("Can not handle qOffsets TextSeg response with this symbol file"));
2148 if (ret > 0)
2149 do_sections = 0;
2152 if (data)
2153 free_symfile_segment_data (data);
2155 if (do_sections)
2157 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
2159 /* This is a temporary kludge to force data and bss to use the same offsets
2160 because that's what nlmconv does now. The real solution requires changes
2161 to the stub and remote.c that I don't have time to do right now. */
2163 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
2164 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
2167 objfile_relocate (symfile_objfile, offs);
2170 /* Stub for catch_exception. */
2172 struct start_remote_args
2174 int from_tty;
2176 /* The current target. */
2177 struct target_ops *target;
2179 /* Non-zero if this is an extended-remote target. */
2180 int extended_p;
2183 static void
2184 remote_start_remote (struct ui_out *uiout, void *opaque)
2186 struct remote_state *rs = get_remote_state ();
2187 struct start_remote_args *args = opaque;
2188 char *wait_status = NULL;
2190 immediate_quit++; /* Allow user to interrupt it. */
2192 /* Ack any packet which the remote side has already sent. */
2193 serial_write (remote_desc, "+", 1);
2195 /* Check whether the target is running now. */
2196 putpkt ("?");
2197 getpkt (&rs->buf, &rs->buf_size, 0);
2199 if (rs->buf[0] == 'W' || rs->buf[0] == 'X')
2201 if (args->extended_p)
2203 /* We're connected, but not running. Drop out before we
2204 call start_remote. */
2205 target_mark_exited (args->target);
2206 return;
2208 else
2209 error (_("The target is not running (try extended-remote?)"));
2211 else
2213 if (args->extended_p)
2214 target_mark_running (args->target);
2216 /* Save the reply for later. */
2217 wait_status = alloca (strlen (rs->buf) + 1);
2218 strcpy (wait_status, rs->buf);
2221 /* Let the stub know that we want it to return the thread. */
2222 set_thread (-1, 0);
2224 /* Without this, some commands which require an active target
2225 (such as kill) won't work. This variable serves (at least)
2226 double duty as both the pid of the target process (if it has
2227 such), and as a flag indicating that a target is active.
2228 These functions should be split out into seperate variables,
2229 especially since GDB will someday have a notion of debugging
2230 several processes. */
2231 inferior_ptid = pid_to_ptid (MAGIC_NULL_PID);
2233 /* Now, if we have thread information, update inferior_ptid. */
2234 inferior_ptid = remote_current_thread (inferior_ptid);
2236 get_offsets (); /* Get text, data & bss offsets. */
2238 /* Use the previously fetched status. */
2239 gdb_assert (wait_status != NULL);
2240 strcpy (rs->buf, wait_status);
2241 rs->cached_wait_status = 1;
2243 immediate_quit--;
2244 start_remote (args->from_tty); /* Initialize gdb process mechanisms. */
2247 /* Open a connection to a remote debugger.
2248 NAME is the filename used for communication. */
2250 static void
2251 remote_open (char *name, int from_tty)
2253 remote_open_1 (name, from_tty, &remote_ops, 0, 0);
2256 /* Just like remote_open, but with asynchronous support. */
2257 static void
2258 remote_async_open (char *name, int from_tty)
2260 remote_open_1 (name, from_tty, &remote_async_ops, 0, 1);
2263 /* Open a connection to a remote debugger using the extended
2264 remote gdb protocol. NAME is the filename used for communication. */
2266 static void
2267 extended_remote_open (char *name, int from_tty)
2269 remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */,
2270 0 /* async_p */);
2273 /* Just like extended_remote_open, but with asynchronous support. */
2274 static void
2275 extended_remote_async_open (char *name, int from_tty)
2277 remote_open_1 (name, from_tty, &extended_async_remote_ops,
2278 1 /*extended_p */, 1 /* async_p */);
2281 /* Generic code for opening a connection to a remote target. */
2283 static void
2284 init_all_packet_configs (void)
2286 int i;
2287 for (i = 0; i < PACKET_MAX; i++)
2288 update_packet_config (&remote_protocol_packets[i]);
2291 /* Symbol look-up. */
2293 static void
2294 remote_check_symbols (struct objfile *objfile)
2296 struct remote_state *rs = get_remote_state ();
2297 char *msg, *reply, *tmp;
2298 struct minimal_symbol *sym;
2299 int end;
2301 if (remote_protocol_packets[PACKET_qSymbol].support == PACKET_DISABLE)
2302 return;
2304 /* Allocate a message buffer. We can't reuse the input buffer in RS,
2305 because we need both at the same time. */
2306 msg = alloca (get_remote_packet_size ());
2308 /* Invite target to request symbol lookups. */
2310 putpkt ("qSymbol::");
2311 getpkt (&rs->buf, &rs->buf_size, 0);
2312 packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSymbol]);
2313 reply = rs->buf;
2315 while (strncmp (reply, "qSymbol:", 8) == 0)
2317 tmp = &reply[8];
2318 end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2);
2319 msg[end] = '\0';
2320 sym = lookup_minimal_symbol (msg, NULL, NULL);
2321 if (sym == NULL)
2322 xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]);
2323 else
2325 CORE_ADDR sym_addr = SYMBOL_VALUE_ADDRESS (sym);
2327 /* If this is a function address, return the start of code
2328 instead of any data function descriptor. */
2329 sym_addr = gdbarch_convert_from_func_ptr_addr (current_gdbarch,
2330 sym_addr,
2331 &current_target);
2333 xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s",
2334 paddr_nz (sym_addr), &reply[8]);
2337 putpkt (msg);
2338 getpkt (&rs->buf, &rs->buf_size, 0);
2339 reply = rs->buf;
2343 static struct serial *
2344 remote_serial_open (char *name)
2346 static int udp_warning = 0;
2348 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2349 of in ser-tcp.c, because it is the remote protocol assuming that the
2350 serial connection is reliable and not the serial connection promising
2351 to be. */
2352 if (!udp_warning && strncmp (name, "udp:", 4) == 0)
2354 warning (_("\
2355 The remote protocol may be unreliable over UDP.\n\
2356 Some events may be lost, rendering further debugging impossible."));
2357 udp_warning = 1;
2360 return serial_open (name);
2363 /* This type describes each known response to the qSupported
2364 packet. */
2365 struct protocol_feature
2367 /* The name of this protocol feature. */
2368 const char *name;
2370 /* The default for this protocol feature. */
2371 enum packet_support default_support;
2373 /* The function to call when this feature is reported, or after
2374 qSupported processing if the feature is not supported.
2375 The first argument points to this structure. The second
2376 argument indicates whether the packet requested support be
2377 enabled, disabled, or probed (or the default, if this function
2378 is being called at the end of processing and this feature was
2379 not reported). The third argument may be NULL; if not NULL, it
2380 is a NUL-terminated string taken from the packet following
2381 this feature's name and an equals sign. */
2382 void (*func) (const struct protocol_feature *, enum packet_support,
2383 const char *);
2385 /* The corresponding packet for this feature. Only used if
2386 FUNC is remote_supported_packet. */
2387 int packet;
2390 static void
2391 remote_supported_packet (const struct protocol_feature *feature,
2392 enum packet_support support,
2393 const char *argument)
2395 if (argument)
2397 warning (_("Remote qSupported response supplied an unexpected value for"
2398 " \"%s\"."), feature->name);
2399 return;
2402 if (remote_protocol_packets[feature->packet].support
2403 == PACKET_SUPPORT_UNKNOWN)
2404 remote_protocol_packets[feature->packet].support = support;
2407 static void
2408 remote_packet_size (const struct protocol_feature *feature,
2409 enum packet_support support, const char *value)
2411 struct remote_state *rs = get_remote_state ();
2413 int packet_size;
2414 char *value_end;
2416 if (support != PACKET_ENABLE)
2417 return;
2419 if (value == NULL || *value == '\0')
2421 warning (_("Remote target reported \"%s\" without a size."),
2422 feature->name);
2423 return;
2426 errno = 0;
2427 packet_size = strtol (value, &value_end, 16);
2428 if (errno != 0 || *value_end != '\0' || packet_size < 0)
2430 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
2431 feature->name, value);
2432 return;
2435 if (packet_size > MAX_REMOTE_PACKET_SIZE)
2437 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
2438 packet_size, MAX_REMOTE_PACKET_SIZE);
2439 packet_size = MAX_REMOTE_PACKET_SIZE;
2442 /* Record the new maximum packet size. */
2443 rs->explicit_packet_size = packet_size;
2446 static struct protocol_feature remote_protocol_features[] = {
2447 { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
2448 { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
2449 PACKET_qXfer_auxv },
2450 { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet,
2451 PACKET_qXfer_features },
2452 { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet,
2453 PACKET_qXfer_libraries },
2454 { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet,
2455 PACKET_qXfer_memory_map },
2456 { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet,
2457 PACKET_qXfer_spu_read },
2458 { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet,
2459 PACKET_qXfer_spu_write },
2460 { "QPassSignals", PACKET_DISABLE, remote_supported_packet,
2461 PACKET_QPassSignals },
2464 static void
2465 remote_query_supported (void)
2467 struct remote_state *rs = get_remote_state ();
2468 char *next;
2469 int i;
2470 unsigned char seen [ARRAY_SIZE (remote_protocol_features)];
2472 /* The packet support flags are handled differently for this packet
2473 than for most others. We treat an error, a disabled packet, and
2474 an empty response identically: any features which must be reported
2475 to be used will be automatically disabled. An empty buffer
2476 accomplishes this, since that is also the representation for a list
2477 containing no features. */
2479 rs->buf[0] = 0;
2480 if (remote_protocol_packets[PACKET_qSupported].support != PACKET_DISABLE)
2482 putpkt ("qSupported");
2483 getpkt (&rs->buf, &rs->buf_size, 0);
2485 /* If an error occured, warn, but do not return - just reset the
2486 buffer to empty and go on to disable features. */
2487 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported])
2488 == PACKET_ERROR)
2490 warning (_("Remote failure reply: %s"), rs->buf);
2491 rs->buf[0] = 0;
2495 memset (seen, 0, sizeof (seen));
2497 next = rs->buf;
2498 while (*next)
2500 enum packet_support is_supported;
2501 char *p, *end, *name_end, *value;
2503 /* First separate out this item from the rest of the packet. If
2504 there's another item after this, we overwrite the separator
2505 (terminated strings are much easier to work with). */
2506 p = next;
2507 end = strchr (p, ';');
2508 if (end == NULL)
2510 end = p + strlen (p);
2511 next = end;
2513 else
2515 *end = '\0';
2516 next = end + 1;
2518 if (end == p)
2520 warning (_("empty item in \"qSupported\" response"));
2521 continue;
2525 name_end = strchr (p, '=');
2526 if (name_end)
2528 /* This is a name=value entry. */
2529 is_supported = PACKET_ENABLE;
2530 value = name_end + 1;
2531 *name_end = '\0';
2533 else
2535 value = NULL;
2536 switch (end[-1])
2538 case '+':
2539 is_supported = PACKET_ENABLE;
2540 break;
2542 case '-':
2543 is_supported = PACKET_DISABLE;
2544 break;
2546 case '?':
2547 is_supported = PACKET_SUPPORT_UNKNOWN;
2548 break;
2550 default:
2551 warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p);
2552 continue;
2554 end[-1] = '\0';
2557 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
2558 if (strcmp (remote_protocol_features[i].name, p) == 0)
2560 const struct protocol_feature *feature;
2562 seen[i] = 1;
2563 feature = &remote_protocol_features[i];
2564 feature->func (feature, is_supported, value);
2565 break;
2569 /* If we increased the packet size, make sure to increase the global
2570 buffer size also. We delay this until after parsing the entire
2571 qSupported packet, because this is the same buffer we were
2572 parsing. */
2573 if (rs->buf_size < rs->explicit_packet_size)
2575 rs->buf_size = rs->explicit_packet_size;
2576 rs->buf = xrealloc (rs->buf, rs->buf_size);
2579 /* Handle the defaults for unmentioned features. */
2580 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
2581 if (!seen[i])
2583 const struct protocol_feature *feature;
2585 feature = &remote_protocol_features[i];
2586 feature->func (feature, feature->default_support, NULL);
2591 static void
2592 remote_open_1 (char *name, int from_tty, struct target_ops *target,
2593 int extended_p, int async_p)
2595 struct remote_state *rs = get_remote_state ();
2596 if (name == 0)
2597 error (_("To open a remote debug connection, you need to specify what\n"
2598 "serial device is attached to the remote system\n"
2599 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
2601 /* See FIXME above. */
2602 if (!async_p)
2603 wait_forever_enabled_p = 1;
2605 /* If we're connected to a running target, target_preopen will kill it.
2606 But if we're connected to a target system with no running process,
2607 then we will still be connected when it returns. Ask this question
2608 first, before target_preopen has a chance to kill anything. */
2609 if (remote_desc != NULL && !target_has_execution)
2611 if (!from_tty
2612 || query (_("Already connected to a remote target. Disconnect? ")))
2613 pop_target ();
2614 else
2615 error (_("Still connected."));
2618 target_preopen (from_tty);
2620 unpush_target (target);
2622 /* This time without a query. If we were connected to an
2623 extended-remote target and target_preopen killed the running
2624 process, we may still be connected. If we are starting "target
2625 remote" now, the extended-remote target will not have been
2626 removed by unpush_target. */
2627 if (remote_desc != NULL && !target_has_execution)
2628 pop_target ();
2630 /* Make sure we send the passed signals list the next time we resume. */
2631 xfree (last_pass_packet);
2632 last_pass_packet = NULL;
2634 remote_fileio_reset ();
2635 reopen_exec_file ();
2636 reread_symbols ();
2638 remote_desc = remote_serial_open (name);
2639 if (!remote_desc)
2640 perror_with_name (name);
2642 if (baud_rate != -1)
2644 if (serial_setbaudrate (remote_desc, baud_rate))
2646 /* The requested speed could not be set. Error out to
2647 top level after closing remote_desc. Take care to
2648 set remote_desc to NULL to avoid closing remote_desc
2649 more than once. */
2650 serial_close (remote_desc);
2651 remote_desc = NULL;
2652 perror_with_name (name);
2656 serial_raw (remote_desc);
2658 /* If there is something sitting in the buffer we might take it as a
2659 response to a command, which would be bad. */
2660 serial_flush_input (remote_desc);
2662 if (from_tty)
2664 puts_filtered ("Remote debugging using ");
2665 puts_filtered (name);
2666 puts_filtered ("\n");
2668 push_target (target); /* Switch to using remote target now. */
2670 /* Assume that the target is running, unless we learn otherwise. */
2671 target_mark_running (target);
2673 /* Reset the target state; these things will be queried either by
2674 remote_query_supported or as they are needed. */
2675 init_all_packet_configs ();
2676 rs->explicit_packet_size = 0;
2678 general_thread = -2;
2679 continue_thread = -2;
2681 /* Probe for ability to use "ThreadInfo" query, as required. */
2682 use_threadinfo_query = 1;
2683 use_threadextra_query = 1;
2685 /* The first packet we send to the target is the optional "supported
2686 packets" request. If the target can answer this, it will tell us
2687 which later probes to skip. */
2688 remote_query_supported ();
2690 /* Next, if the target can specify a description, read it. We do
2691 this before anything involving memory or registers. */
2692 target_find_description ();
2694 if (async_p)
2696 /* With this target we start out by owning the terminal. */
2697 remote_async_terminal_ours_p = 1;
2699 /* FIXME: cagney/1999-09-23: During the initial connection it is
2700 assumed that the target is already ready and able to respond to
2701 requests. Unfortunately remote_start_remote() eventually calls
2702 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2703 around this. Eventually a mechanism that allows
2704 wait_for_inferior() to expect/get timeouts will be
2705 implemented. */
2706 wait_forever_enabled_p = 0;
2709 /* First delete any symbols previously loaded from shared libraries. */
2710 no_shared_libraries (NULL, 0);
2712 /* Start the remote connection. If error() or QUIT, discard this
2713 target (we'd otherwise be in an inconsistent state) and then
2714 propogate the error on up the exception chain. This ensures that
2715 the caller doesn't stumble along blindly assuming that the
2716 function succeeded. The CLI doesn't have this problem but other
2717 UI's, such as MI do.
2719 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
2720 this function should return an error indication letting the
2721 caller restore the previous state. Unfortunately the command
2722 ``target remote'' is directly wired to this function making that
2723 impossible. On a positive note, the CLI side of this problem has
2724 been fixed - the function set_cmd_context() makes it possible for
2725 all the ``target ....'' commands to share a common callback
2726 function. See cli-dump.c. */
2728 struct gdb_exception ex;
2729 struct start_remote_args args;
2731 args.from_tty = from_tty;
2732 args.target = target;
2733 args.extended_p = extended_p;
2735 ex = catch_exception (uiout, remote_start_remote, &args, RETURN_MASK_ALL);
2736 if (ex.reason < 0)
2738 pop_target ();
2739 if (async_p)
2740 wait_forever_enabled_p = 1;
2741 throw_exception (ex);
2745 if (async_p)
2746 wait_forever_enabled_p = 1;
2748 if (extended_p)
2750 /* Tell the remote that we are using the extended protocol. */
2751 putpkt ("!");
2752 getpkt (&rs->buf, &rs->buf_size, 0);
2755 /* If we connected to a live target, do some additional setup. */
2756 if (target_has_execution)
2758 if (exec_bfd) /* No use without an exec file. */
2759 remote_check_symbols (symfile_objfile);
2763 /* This takes a program previously attached to and detaches it. After
2764 this is done, GDB can be used to debug some other program. We
2765 better not have left any breakpoints in the target program or it'll
2766 die when it hits one. */
2768 static void
2769 remote_detach_1 (char *args, int from_tty, int extended)
2771 struct remote_state *rs = get_remote_state ();
2773 if (args)
2774 error (_("Argument given to \"detach\" when remotely debugging."));
2776 if (!target_has_execution)
2777 error (_("No process to detach from."));
2779 /* Tell the remote target to detach. */
2780 strcpy (rs->buf, "D");
2781 putpkt (rs->buf);
2782 getpkt (&rs->buf, &rs->buf_size, 0);
2784 if (rs->buf[0] == 'E')
2785 error (_("Can't detach process."));
2787 /* Unregister the file descriptor from the event loop. */
2788 if (target_is_async_p ())
2789 serial_async (remote_desc, NULL, 0);
2791 target_mourn_inferior ();
2792 if (from_tty)
2794 if (extended)
2795 puts_filtered ("Detached from remote process.\n");
2796 else
2797 puts_filtered ("Ending remote debugging.\n");
2801 static void
2802 remote_detach (char *args, int from_tty)
2804 remote_detach_1 (args, from_tty, 0);
2807 static void
2808 extended_remote_detach (char *args, int from_tty)
2810 remote_detach_1 (args, from_tty, 1);
2813 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
2815 static void
2816 remote_disconnect (struct target_ops *target, char *args, int from_tty)
2818 if (args)
2819 error (_("Argument given to \"disconnect\" when remotely debugging."));
2821 /* Unregister the file descriptor from the event loop. */
2822 if (target_is_async_p ())
2823 serial_async (remote_desc, NULL, 0);
2825 /* Make sure we unpush even the extended remote targets; mourn
2826 won't do it. So call remote_mourn_1 directly instead of
2827 target_mourn_inferior. */
2828 remote_mourn_1 (target);
2830 if (from_tty)
2831 puts_filtered ("Ending remote debugging.\n");
2834 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
2835 be chatty about it. */
2837 static void
2838 extended_remote_attach_1 (struct target_ops *target, char *args, int from_tty)
2840 struct remote_state *rs = get_remote_state ();
2841 pid_t pid;
2842 char *dummy;
2844 if (!args)
2845 error_no_arg (_("process-id to attach"));
2847 dummy = args;
2848 pid = strtol (args, &dummy, 0);
2849 /* Some targets don't set errno on errors, grrr! */
2850 if (pid == 0 && args == dummy)
2851 error (_("Illegal process-id: %s."), args);
2853 if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE)
2854 error (_("This target does not support attaching to a process"));
2856 sprintf (rs->buf, "vAttach;%x", pid);
2857 putpkt (rs->buf);
2858 getpkt (&rs->buf, &rs->buf_size, 0);
2860 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vAttach]) == PACKET_OK)
2862 if (from_tty)
2863 printf_unfiltered (_("Attached to %s\n"),
2864 target_pid_to_str (pid_to_ptid (pid)));
2866 /* We have a wait response; reuse it. */
2867 rs->cached_wait_status = 1;
2869 else if (remote_protocol_packets[PACKET_vAttach].support == PACKET_DISABLE)
2870 error (_("This target does not support attaching to a process"));
2871 else
2872 error (_("Attaching to %s failed"),
2873 target_pid_to_str (pid_to_ptid (pid)));
2875 target_mark_running (target);
2876 inferior_ptid = pid_to_ptid (pid);
2879 static void
2880 extended_remote_attach (char *args, int from_tty)
2882 extended_remote_attach_1 (&extended_remote_ops, args, from_tty);
2885 static void
2886 extended_async_remote_attach (char *args, int from_tty)
2888 extended_remote_attach_1 (&extended_async_remote_ops, args, from_tty);
2891 /* Convert hex digit A to a number. */
2893 static int
2894 fromhex (int a)
2896 if (a >= '0' && a <= '9')
2897 return a - '0';
2898 else if (a >= 'a' && a <= 'f')
2899 return a - 'a' + 10;
2900 else if (a >= 'A' && a <= 'F')
2901 return a - 'A' + 10;
2902 else
2903 error (_("Reply contains invalid hex digit %d"), a);
2906 static int
2907 hex2bin (const char *hex, gdb_byte *bin, int count)
2909 int i;
2911 for (i = 0; i < count; i++)
2913 if (hex[0] == 0 || hex[1] == 0)
2915 /* Hex string is short, or of uneven length.
2916 Return the count that has been converted so far. */
2917 return i;
2919 *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]);
2920 hex += 2;
2922 return i;
2925 /* Convert number NIB to a hex digit. */
2927 static int
2928 tohex (int nib)
2930 if (nib < 10)
2931 return '0' + nib;
2932 else
2933 return 'a' + nib - 10;
2936 static int
2937 bin2hex (const gdb_byte *bin, char *hex, int count)
2939 int i;
2940 /* May use a length, or a nul-terminated string as input. */
2941 if (count == 0)
2942 count = strlen ((char *) bin);
2944 for (i = 0; i < count; i++)
2946 *hex++ = tohex ((*bin >> 4) & 0xf);
2947 *hex++ = tohex (*bin++ & 0xf);
2949 *hex = 0;
2950 return i;
2953 /* Check for the availability of vCont. This function should also check
2954 the response. */
2956 static void
2957 remote_vcont_probe (struct remote_state *rs)
2959 char *buf;
2961 strcpy (rs->buf, "vCont?");
2962 putpkt (rs->buf);
2963 getpkt (&rs->buf, &rs->buf_size, 0);
2964 buf = rs->buf;
2966 /* Make sure that the features we assume are supported. */
2967 if (strncmp (buf, "vCont", 5) == 0)
2969 char *p = &buf[5];
2970 int support_s, support_S, support_c, support_C;
2972 support_s = 0;
2973 support_S = 0;
2974 support_c = 0;
2975 support_C = 0;
2976 while (p && *p == ';')
2978 p++;
2979 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
2980 support_s = 1;
2981 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
2982 support_S = 1;
2983 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
2984 support_c = 1;
2985 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
2986 support_C = 1;
2988 p = strchr (p, ';');
2991 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
2992 BUF will make packet_ok disable the packet. */
2993 if (!support_s || !support_S || !support_c || !support_C)
2994 buf[0] = 0;
2997 packet_ok (buf, &remote_protocol_packets[PACKET_vCont]);
3000 /* Resume the remote inferior by using a "vCont" packet. The thread
3001 to be resumed is PTID; STEP and SIGGNAL indicate whether the
3002 resumed thread should be single-stepped and/or signalled. If PTID's
3003 PID is -1, then all threads are resumed; the thread to be stepped and/or
3004 signalled is given in the global INFERIOR_PTID. This function returns
3005 non-zero iff it resumes the inferior.
3007 This function issues a strict subset of all possible vCont commands at the
3008 moment. */
3010 static int
3011 remote_vcont_resume (ptid_t ptid, int step, enum target_signal siggnal)
3013 struct remote_state *rs = get_remote_state ();
3014 int pid = PIDGET (ptid);
3015 char *outbuf;
3016 struct cleanup *old_cleanup;
3018 if (remote_protocol_packets[PACKET_vCont].support == PACKET_SUPPORT_UNKNOWN)
3019 remote_vcont_probe (rs);
3021 if (remote_protocol_packets[PACKET_vCont].support == PACKET_DISABLE)
3022 return 0;
3024 /* If we could generate a wider range of packets, we'd have to worry
3025 about overflowing BUF. Should there be a generic
3026 "multi-part-packet" packet? */
3028 if (PIDGET (inferior_ptid) == MAGIC_NULL_PID)
3030 /* MAGIC_NULL_PTID means that we don't have any active threads, so we
3031 don't have any PID numbers the inferior will understand. Make sure
3032 to only send forms that do not specify a PID. */
3033 if (step && siggnal != TARGET_SIGNAL_0)
3034 outbuf = xstrprintf ("vCont;S%02x", siggnal);
3035 else if (step)
3036 outbuf = xstrprintf ("vCont;s");
3037 else if (siggnal != TARGET_SIGNAL_0)
3038 outbuf = xstrprintf ("vCont;C%02x", siggnal);
3039 else
3040 outbuf = xstrprintf ("vCont;c");
3042 else if (pid == -1)
3044 /* Resume all threads, with preference for INFERIOR_PTID. */
3045 if (step && siggnal != TARGET_SIGNAL_0)
3046 outbuf = xstrprintf ("vCont;S%02x:%x;c", siggnal,
3047 PIDGET (inferior_ptid));
3048 else if (step)
3049 outbuf = xstrprintf ("vCont;s:%x;c", PIDGET (inferior_ptid));
3050 else if (siggnal != TARGET_SIGNAL_0)
3051 outbuf = xstrprintf ("vCont;C%02x:%x;c", siggnal,
3052 PIDGET (inferior_ptid));
3053 else
3054 outbuf = xstrprintf ("vCont;c");
3056 else
3058 /* Scheduler locking; resume only PTID. */
3059 if (step && siggnal != TARGET_SIGNAL_0)
3060 outbuf = xstrprintf ("vCont;S%02x:%x", siggnal, pid);
3061 else if (step)
3062 outbuf = xstrprintf ("vCont;s:%x", pid);
3063 else if (siggnal != TARGET_SIGNAL_0)
3064 outbuf = xstrprintf ("vCont;C%02x:%x", siggnal, pid);
3065 else
3066 outbuf = xstrprintf ("vCont;c:%x", pid);
3069 gdb_assert (outbuf && strlen (outbuf) < get_remote_packet_size ());
3070 old_cleanup = make_cleanup (xfree, outbuf);
3072 putpkt (outbuf);
3074 do_cleanups (old_cleanup);
3076 return 1;
3079 /* Tell the remote machine to resume. */
3081 static enum target_signal last_sent_signal = TARGET_SIGNAL_0;
3083 static int last_sent_step;
3085 static void
3086 remote_resume (ptid_t ptid, int step, enum target_signal siggnal)
3088 struct remote_state *rs = get_remote_state ();
3089 char *buf;
3090 int pid = PIDGET (ptid);
3092 last_sent_signal = siggnal;
3093 last_sent_step = step;
3095 /* A hook for when we need to do something at the last moment before
3096 resumption. */
3097 if (deprecated_target_resume_hook)
3098 (*deprecated_target_resume_hook) ();
3100 /* Update the inferior on signals to silently pass, if they've changed. */
3101 remote_pass_signals ();
3103 /* The vCont packet doesn't need to specify threads via Hc. */
3104 if (remote_vcont_resume (ptid, step, siggnal))
3105 return;
3107 /* All other supported resume packets do use Hc, so call set_thread. */
3108 if (pid == -1)
3109 set_thread (0, 0); /* Run any thread. */
3110 else
3111 set_thread (pid, 0); /* Run this thread. */
3113 buf = rs->buf;
3114 if (siggnal != TARGET_SIGNAL_0)
3116 buf[0] = step ? 'S' : 'C';
3117 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
3118 buf[2] = tohex (((int) siggnal) & 0xf);
3119 buf[3] = '\0';
3121 else
3122 strcpy (buf, step ? "s" : "c");
3124 putpkt (buf);
3127 /* Same as remote_resume, but with async support. */
3128 static void
3129 remote_async_resume (ptid_t ptid, int step, enum target_signal siggnal)
3131 remote_resume (ptid, step, siggnal);
3133 /* We are about to start executing the inferior, let's register it
3134 with the event loop. NOTE: this is the one place where all the
3135 execution commands end up. We could alternatively do this in each
3136 of the execution commands in infcmd.c. */
3137 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
3138 into infcmd.c in order to allow inferior function calls to work
3139 NOT asynchronously. */
3140 if (target_can_async_p ())
3141 target_async (inferior_event_handler, 0);
3142 /* Tell the world that the target is now executing. */
3143 /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set
3144 this? Instead, should the client of target just assume (for
3145 async targets) that the target is going to start executing? Is
3146 this information already found in the continuation block? */
3147 if (target_is_async_p ())
3148 target_executing = 1;
3152 /* Set up the signal handler for SIGINT, while the target is
3153 executing, ovewriting the 'regular' SIGINT signal handler. */
3154 static void
3155 initialize_sigint_signal_handler (void)
3157 sigint_remote_token =
3158 create_async_signal_handler (async_remote_interrupt, NULL);
3159 signal (SIGINT, handle_remote_sigint);
3162 /* Signal handler for SIGINT, while the target is executing. */
3163 static void
3164 handle_remote_sigint (int sig)
3166 signal (sig, handle_remote_sigint_twice);
3167 sigint_remote_twice_token =
3168 create_async_signal_handler (async_remote_interrupt_twice, NULL);
3169 mark_async_signal_handler_wrapper (sigint_remote_token);
3172 /* Signal handler for SIGINT, installed after SIGINT has already been
3173 sent once. It will take effect the second time that the user sends
3174 a ^C. */
3175 static void
3176 handle_remote_sigint_twice (int sig)
3178 signal (sig, handle_sigint);
3179 sigint_remote_twice_token =
3180 create_async_signal_handler (inferior_event_handler_wrapper, NULL);
3181 mark_async_signal_handler_wrapper (sigint_remote_twice_token);
3184 /* Perform the real interruption of the target execution, in response
3185 to a ^C. */
3186 static void
3187 async_remote_interrupt (gdb_client_data arg)
3189 if (remote_debug)
3190 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
3192 target_stop ();
3195 /* Perform interrupt, if the first attempt did not succeed. Just give
3196 up on the target alltogether. */
3197 void
3198 async_remote_interrupt_twice (gdb_client_data arg)
3200 if (remote_debug)
3201 fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n");
3202 /* Do something only if the target was not killed by the previous
3203 cntl-C. */
3204 if (target_executing)
3206 interrupt_query ();
3207 signal (SIGINT, handle_remote_sigint);
3211 /* Reinstall the usual SIGINT handlers, after the target has
3212 stopped. */
3213 static void
3214 cleanup_sigint_signal_handler (void *dummy)
3216 signal (SIGINT, handle_sigint);
3217 if (sigint_remote_twice_token)
3218 delete_async_signal_handler (&sigint_remote_twice_token);
3219 if (sigint_remote_token)
3220 delete_async_signal_handler (&sigint_remote_token);
3223 /* Send ^C to target to halt it. Target will respond, and send us a
3224 packet. */
3225 static void (*ofunc) (int);
3227 /* The command line interface's stop routine. This function is installed
3228 as a signal handler for SIGINT. The first time a user requests a
3229 stop, we call remote_stop to send a break or ^C. If there is no
3230 response from the target (it didn't stop when the user requested it),
3231 we ask the user if he'd like to detach from the target. */
3232 static void
3233 remote_interrupt (int signo)
3235 /* If this doesn't work, try more severe steps. */
3236 signal (signo, remote_interrupt_twice);
3238 if (remote_debug)
3239 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
3241 target_stop ();
3244 /* The user typed ^C twice. */
3246 static void
3247 remote_interrupt_twice (int signo)
3249 signal (signo, ofunc);
3250 interrupt_query ();
3251 signal (signo, remote_interrupt);
3254 /* This is the generic stop called via the target vector. When a target
3255 interrupt is requested, either by the command line or the GUI, we
3256 will eventually end up here. */
3257 static void
3258 remote_stop (void)
3260 /* Send a break or a ^C, depending on user preference. */
3261 if (remote_debug)
3262 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
3264 if (remote_break)
3265 serial_send_break (remote_desc);
3266 else
3267 serial_write (remote_desc, "\003", 1);
3270 /* Ask the user what to do when an interrupt is received. */
3272 static void
3273 interrupt_query (void)
3275 target_terminal_ours ();
3277 if (query ("Interrupted while waiting for the program.\n\
3278 Give up (and stop debugging it)? "))
3280 target_mourn_inferior ();
3281 deprecated_throw_reason (RETURN_QUIT);
3284 target_terminal_inferior ();
3287 /* Enable/disable target terminal ownership. Most targets can use
3288 terminal groups to control terminal ownership. Remote targets are
3289 different in that explicit transfer of ownership to/from GDB/target
3290 is required. */
3292 static void
3293 remote_async_terminal_inferior (void)
3295 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
3296 sync_execution here. This function should only be called when
3297 GDB is resuming the inferior in the forground. A background
3298 resume (``run&'') should leave GDB in control of the terminal and
3299 consequently should not call this code. */
3300 if (!sync_execution)
3301 return;
3302 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
3303 calls target_terminal_*() idenpotent. The event-loop GDB talking
3304 to an asynchronous target with a synchronous command calls this
3305 function from both event-top.c and infrun.c/infcmd.c. Once GDB
3306 stops trying to transfer the terminal to the target when it
3307 shouldn't this guard can go away. */
3308 if (!remote_async_terminal_ours_p)
3309 return;
3310 delete_file_handler (input_fd);
3311 remote_async_terminal_ours_p = 0;
3312 initialize_sigint_signal_handler ();
3313 /* NOTE: At this point we could also register our selves as the
3314 recipient of all input. Any characters typed could then be
3315 passed on down to the target. */
3318 static void
3319 remote_async_terminal_ours (void)
3321 /* See FIXME in remote_async_terminal_inferior. */
3322 if (!sync_execution)
3323 return;
3324 /* See FIXME in remote_async_terminal_inferior. */
3325 if (remote_async_terminal_ours_p)
3326 return;
3327 cleanup_sigint_signal_handler (NULL);
3328 add_file_handler (input_fd, stdin_event_handler, 0);
3329 remote_async_terminal_ours_p = 1;
3332 /* If nonzero, ignore the next kill. */
3334 int kill_kludge;
3336 void
3337 remote_console_output (char *msg)
3339 char *p;
3341 for (p = msg; p[0] && p[1]; p += 2)
3343 char tb[2];
3344 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
3345 tb[0] = c;
3346 tb[1] = 0;
3347 fputs_unfiltered (tb, gdb_stdtarg);
3349 gdb_flush (gdb_stdtarg);
3352 /* Wait until the remote machine stops, then return,
3353 storing status in STATUS just as `wait' would.
3354 Returns "pid", which in the case of a multi-threaded
3355 remote OS, is the thread-id. */
3357 static ptid_t
3358 remote_wait (ptid_t ptid, struct target_waitstatus *status)
3360 struct remote_state *rs = get_remote_state ();
3361 struct remote_arch_state *rsa = get_remote_arch_state ();
3362 ULONGEST thread_num = -1;
3363 ULONGEST addr;
3364 int solibs_changed = 0;
3366 status->kind = TARGET_WAITKIND_EXITED;
3367 status->value.integer = 0;
3369 while (1)
3371 char *buf, *p;
3373 if (rs->cached_wait_status)
3374 /* Use the cached wait status, but only once. */
3375 rs->cached_wait_status = 0;
3376 else
3378 ofunc = signal (SIGINT, remote_interrupt);
3379 /* If the user hit C-c before this packet, or between packets,
3380 pretend that it was hit right here. */
3381 if (quit_flag)
3383 quit_flag = 0;
3384 remote_interrupt (SIGINT);
3386 getpkt (&rs->buf, &rs->buf_size, 1);
3387 signal (SIGINT, ofunc);
3390 buf = rs->buf;
3392 /* This is a hook for when we need to do something (perhaps the
3393 collection of trace data) every time the target stops. */
3394 if (deprecated_target_wait_loop_hook)
3395 (*deprecated_target_wait_loop_hook) ();
3397 remote_stopped_by_watchpoint_p = 0;
3399 switch (buf[0])
3401 case 'E': /* Error of some sort. */
3402 warning (_("Remote failure reply: %s"), buf);
3403 continue;
3404 case 'F': /* File-I/O request. */
3405 remote_fileio_request (buf);
3406 continue;
3407 case 'T': /* Status with PC, SP, FP, ... */
3409 gdb_byte regs[MAX_REGISTER_SIZE];
3411 /* Expedited reply, containing Signal, {regno, reg} repeat. */
3412 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3413 ss = signal number
3414 n... = register number
3415 r... = register contents
3417 p = &buf[3]; /* after Txx */
3419 while (*p)
3421 char *p1;
3422 char *p_temp;
3423 int fieldsize;
3424 LONGEST pnum = 0;
3426 /* If the packet contains a register number save it in
3427 pnum and set p1 to point to the character following
3428 it. Otherwise p1 points to p. */
3430 /* If this packet is an awatch packet, don't parse the
3431 'a' as a register number. */
3433 if (strncmp (p, "awatch", strlen("awatch")) != 0)
3435 /* Read the ``P'' register number. */
3436 pnum = strtol (p, &p_temp, 16);
3437 p1 = p_temp;
3439 else
3440 p1 = p;
3442 if (p1 == p) /* No register number present here. */
3444 p1 = strchr (p, ':');
3445 if (p1 == NULL)
3446 error (_("Malformed packet(a) (missing colon): %s\n\
3447 Packet: '%s'\n"),
3448 p, buf);
3449 if (strncmp (p, "thread", p1 - p) == 0)
3451 p_temp = unpack_varlen_hex (++p1, &thread_num);
3452 record_currthread (thread_num);
3453 p = p_temp;
3455 else if ((strncmp (p, "watch", p1 - p) == 0)
3456 || (strncmp (p, "rwatch", p1 - p) == 0)
3457 || (strncmp (p, "awatch", p1 - p) == 0))
3459 remote_stopped_by_watchpoint_p = 1;
3460 p = unpack_varlen_hex (++p1, &addr);
3461 remote_watch_data_address = (CORE_ADDR)addr;
3463 else if (strncmp (p, "library", p1 - p) == 0)
3465 p1++;
3466 p_temp = p1;
3467 while (*p_temp && *p_temp != ';')
3468 p_temp++;
3470 solibs_changed = 1;
3471 p = p_temp;
3473 else
3475 /* Silently skip unknown optional info. */
3476 p_temp = strchr (p1 + 1, ';');
3477 if (p_temp)
3478 p = p_temp;
3481 else
3483 struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum);
3484 p = p1;
3486 if (*p++ != ':')
3487 error (_("Malformed packet(b) (missing colon): %s\n\
3488 Packet: '%s'\n"),
3489 p, buf);
3491 if (reg == NULL)
3492 error (_("Remote sent bad register number %s: %s\n\
3493 Packet: '%s'\n"),
3494 phex_nz (pnum, 0), p, buf);
3496 fieldsize = hex2bin (p, regs,
3497 register_size (current_gdbarch,
3498 reg->regnum));
3499 p += 2 * fieldsize;
3500 if (fieldsize < register_size (current_gdbarch,
3501 reg->regnum))
3502 warning (_("Remote reply is too short: %s"), buf);
3503 regcache_raw_supply (get_current_regcache (),
3504 reg->regnum, regs);
3507 if (*p++ != ';')
3508 error (_("Remote register badly formatted: %s\nhere: %s"),
3509 buf, p);
3512 /* fall through */
3513 case 'S': /* Old style status, just signal only. */
3514 if (solibs_changed)
3515 status->kind = TARGET_WAITKIND_LOADED;
3516 else
3518 status->kind = TARGET_WAITKIND_STOPPED;
3519 status->value.sig = (enum target_signal)
3520 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3523 if (buf[3] == 'p')
3525 thread_num = strtol ((const char *) &buf[4], NULL, 16);
3526 record_currthread (thread_num);
3528 goto got_status;
3529 case 'W': /* Target exited. */
3531 /* The remote process exited. */
3532 status->kind = TARGET_WAITKIND_EXITED;
3533 status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
3534 goto got_status;
3536 case 'X':
3537 status->kind = TARGET_WAITKIND_SIGNALLED;
3538 status->value.sig = (enum target_signal)
3539 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3540 kill_kludge = 1;
3542 goto got_status;
3543 case 'O': /* Console output. */
3544 remote_console_output (buf + 1);
3545 continue;
3546 case '\0':
3547 if (last_sent_signal != TARGET_SIGNAL_0)
3549 /* Zero length reply means that we tried 'S' or 'C' and
3550 the remote system doesn't support it. */
3551 target_terminal_ours_for_output ();
3552 printf_filtered
3553 ("Can't send signals to this remote system. %s not sent.\n",
3554 target_signal_to_name (last_sent_signal));
3555 last_sent_signal = TARGET_SIGNAL_0;
3556 target_terminal_inferior ();
3558 strcpy ((char *) buf, last_sent_step ? "s" : "c");
3559 putpkt ((char *) buf);
3560 continue;
3562 /* else fallthrough */
3563 default:
3564 warning (_("Invalid remote reply: %s"), buf);
3565 continue;
3568 got_status:
3569 if (thread_num != -1)
3571 return pid_to_ptid (thread_num);
3573 return inferior_ptid;
3576 /* Async version of remote_wait. */
3577 static ptid_t
3578 remote_async_wait (ptid_t ptid, struct target_waitstatus *status)
3580 struct remote_state *rs = get_remote_state ();
3581 struct remote_arch_state *rsa = get_remote_arch_state ();
3582 ULONGEST thread_num = -1;
3583 ULONGEST addr;
3584 int solibs_changed = 0;
3586 status->kind = TARGET_WAITKIND_EXITED;
3587 status->value.integer = 0;
3589 remote_stopped_by_watchpoint_p = 0;
3591 while (1)
3593 char *buf, *p;
3595 if (rs->cached_wait_status)
3596 /* Use the cached wait status, but only once. */
3597 rs->cached_wait_status = 0;
3598 else
3600 if (!target_is_async_p ())
3602 ofunc = signal (SIGINT, remote_interrupt);
3603 /* If the user hit C-c before this packet, or between packets,
3604 pretend that it was hit right here. */
3605 if (quit_flag)
3607 quit_flag = 0;
3608 remote_interrupt (SIGINT);
3611 /* FIXME: cagney/1999-09-27: If we're in async mode we should
3612 _never_ wait for ever -> test on target_is_async_p().
3613 However, before we do that we need to ensure that the caller
3614 knows how to take the target into/out of async mode. */
3615 getpkt (&rs->buf, &rs->buf_size, wait_forever_enabled_p);
3616 if (!target_is_async_p ())
3617 signal (SIGINT, ofunc);
3620 buf = rs->buf;
3622 /* This is a hook for when we need to do something (perhaps the
3623 collection of trace data) every time the target stops. */
3624 if (deprecated_target_wait_loop_hook)
3625 (*deprecated_target_wait_loop_hook) ();
3627 switch (buf[0])
3629 case 'E': /* Error of some sort. */
3630 warning (_("Remote failure reply: %s"), buf);
3631 continue;
3632 case 'F': /* File-I/O request. */
3633 remote_fileio_request (buf);
3634 continue;
3635 case 'T': /* Status with PC, SP, FP, ... */
3637 gdb_byte regs[MAX_REGISTER_SIZE];
3639 /* Expedited reply, containing Signal, {regno, reg} repeat. */
3640 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3641 ss = signal number
3642 n... = register number
3643 r... = register contents
3645 p = &buf[3]; /* after Txx */
3647 while (*p)
3649 char *p1;
3650 char *p_temp;
3651 int fieldsize;
3652 long pnum = 0;
3654 /* If the packet contains a register number, save it
3655 in pnum and set p1 to point to the character
3656 following it. Otherwise p1 points to p. */
3658 /* If this packet is an awatch packet, don't parse the 'a'
3659 as a register number. */
3661 if (strncmp (p, "awatch", strlen("awatch")) != 0)
3663 /* Read the register number. */
3664 pnum = strtol (p, &p_temp, 16);
3665 p1 = p_temp;
3667 else
3668 p1 = p;
3670 if (p1 == p) /* No register number present here. */
3672 p1 = strchr (p, ':');
3673 if (p1 == NULL)
3674 error (_("Malformed packet(a) (missing colon): %s\n\
3675 Packet: '%s'\n"),
3676 p, buf);
3677 if (strncmp (p, "thread", p1 - p) == 0)
3679 p_temp = unpack_varlen_hex (++p1, &thread_num);
3680 record_currthread (thread_num);
3681 p = p_temp;
3683 else if ((strncmp (p, "watch", p1 - p) == 0)
3684 || (strncmp (p, "rwatch", p1 - p) == 0)
3685 || (strncmp (p, "awatch", p1 - p) == 0))
3687 remote_stopped_by_watchpoint_p = 1;
3688 p = unpack_varlen_hex (++p1, &addr);
3689 remote_watch_data_address = (CORE_ADDR)addr;
3691 else if (strncmp (p, "library", p1 - p) == 0)
3693 p1++;
3694 p_temp = p1;
3695 while (*p_temp && *p_temp != ';')
3696 p_temp++;
3698 solibs_changed = 1;
3699 p = p_temp;
3701 else
3703 /* Silently skip unknown optional info. */
3704 p_temp = strchr (p1 + 1, ';');
3705 if (p_temp)
3706 p = p_temp;
3710 else
3712 struct packet_reg *reg = packet_reg_from_pnum (rsa, pnum);
3713 p = p1;
3714 if (*p++ != ':')
3715 error (_("Malformed packet(b) (missing colon): %s\n\
3716 Packet: '%s'\n"),
3717 p, buf);
3719 if (reg == NULL)
3720 error (_("Remote sent bad register number %ld: %s\n\
3721 Packet: '%s'\n"),
3722 pnum, p, buf);
3724 fieldsize = hex2bin (p, regs,
3725 register_size (current_gdbarch,
3726 reg->regnum));
3727 p += 2 * fieldsize;
3728 if (fieldsize < register_size (current_gdbarch,
3729 reg->regnum))
3730 warning (_("Remote reply is too short: %s"), buf);
3731 regcache_raw_supply (get_current_regcache (),
3732 reg->regnum, regs);
3735 if (*p++ != ';')
3736 error (_("Remote register badly formatted: %s\nhere: %s"),
3737 buf, p);
3740 /* fall through */
3741 case 'S': /* Old style status, just signal only. */
3742 if (solibs_changed)
3743 status->kind = TARGET_WAITKIND_LOADED;
3744 else
3746 status->kind = TARGET_WAITKIND_STOPPED;
3747 status->value.sig = (enum target_signal)
3748 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3751 if (buf[3] == 'p')
3753 thread_num = strtol ((const char *) &buf[4], NULL, 16);
3754 record_currthread (thread_num);
3756 goto got_status;
3757 case 'W': /* Target exited. */
3759 /* The remote process exited. */
3760 status->kind = TARGET_WAITKIND_EXITED;
3761 status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
3762 goto got_status;
3764 case 'X':
3765 status->kind = TARGET_WAITKIND_SIGNALLED;
3766 status->value.sig = (enum target_signal)
3767 (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
3768 kill_kludge = 1;
3770 goto got_status;
3771 case 'O': /* Console output. */
3772 remote_console_output (buf + 1);
3773 /* Return immediately to the event loop. The event loop will
3774 still be waiting on the inferior afterwards. */
3775 status->kind = TARGET_WAITKIND_IGNORE;
3776 goto got_status;
3777 case '\0':
3778 if (last_sent_signal != TARGET_SIGNAL_0)
3780 /* Zero length reply means that we tried 'S' or 'C' and
3781 the remote system doesn't support it. */
3782 target_terminal_ours_for_output ();
3783 printf_filtered
3784 ("Can't send signals to this remote system. %s not sent.\n",
3785 target_signal_to_name (last_sent_signal));
3786 last_sent_signal = TARGET_SIGNAL_0;
3787 target_terminal_inferior ();
3789 strcpy ((char *) buf, last_sent_step ? "s" : "c");
3790 putpkt ((char *) buf);
3791 continue;
3793 /* else fallthrough */
3794 default:
3795 warning (_("Invalid remote reply: %s"), buf);
3796 continue;
3799 got_status:
3800 if (thread_num != -1)
3802 return pid_to_ptid (thread_num);
3804 return inferior_ptid;
3807 /* Fetch a single register using a 'p' packet. */
3809 static int
3810 fetch_register_using_p (struct regcache *regcache, struct packet_reg *reg)
3812 struct remote_state *rs = get_remote_state ();
3813 char *buf, *p;
3814 char regp[MAX_REGISTER_SIZE];
3815 int i;
3817 if (remote_protocol_packets[PACKET_p].support == PACKET_DISABLE)
3818 return 0;
3820 if (reg->pnum == -1)
3821 return 0;
3823 p = rs->buf;
3824 *p++ = 'p';
3825 p += hexnumstr (p, reg->pnum);
3826 *p++ = '\0';
3827 remote_send (&rs->buf, &rs->buf_size);
3829 buf = rs->buf;
3831 switch (packet_ok (buf, &remote_protocol_packets[PACKET_p]))
3833 case PACKET_OK:
3834 break;
3835 case PACKET_UNKNOWN:
3836 return 0;
3837 case PACKET_ERROR:
3838 error (_("Could not fetch register \"%s\""),
3839 gdbarch_register_name (get_regcache_arch (regcache), reg->regnum));
3842 /* If this register is unfetchable, tell the regcache. */
3843 if (buf[0] == 'x')
3845 regcache_raw_supply (regcache, reg->regnum, NULL);
3846 return 1;
3849 /* Otherwise, parse and supply the value. */
3850 p = buf;
3851 i = 0;
3852 while (p[0] != 0)
3854 if (p[1] == 0)
3855 error (_("fetch_register_using_p: early buf termination"));
3857 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
3858 p += 2;
3860 regcache_raw_supply (regcache, reg->regnum, regp);
3861 return 1;
3864 /* Fetch the registers included in the target's 'g' packet. */
3866 static int
3867 send_g_packet (void)
3869 struct remote_state *rs = get_remote_state ();
3870 int i, buf_len;
3871 char *p;
3872 char *regs;
3874 sprintf (rs->buf, "g");
3875 remote_send (&rs->buf, &rs->buf_size);
3877 /* We can get out of synch in various cases. If the first character
3878 in the buffer is not a hex character, assume that has happened
3879 and try to fetch another packet to read. */
3880 while ((rs->buf[0] < '0' || rs->buf[0] > '9')
3881 && (rs->buf[0] < 'A' || rs->buf[0] > 'F')
3882 && (rs->buf[0] < 'a' || rs->buf[0] > 'f')
3883 && rs->buf[0] != 'x') /* New: unavailable register value. */
3885 if (remote_debug)
3886 fprintf_unfiltered (gdb_stdlog,
3887 "Bad register packet; fetching a new packet\n");
3888 getpkt (&rs->buf, &rs->buf_size, 0);
3891 buf_len = strlen (rs->buf);
3893 /* Sanity check the received packet. */
3894 if (buf_len % 2 != 0)
3895 error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf);
3897 return buf_len / 2;
3900 static void
3901 process_g_packet (struct regcache *regcache)
3903 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3904 struct remote_state *rs = get_remote_state ();
3905 struct remote_arch_state *rsa = get_remote_arch_state ();
3906 int i, buf_len;
3907 char *p;
3908 char *regs;
3910 buf_len = strlen (rs->buf);
3912 /* Further sanity checks, with knowledge of the architecture. */
3913 if (buf_len > 2 * rsa->sizeof_g_packet)
3914 error (_("Remote 'g' packet reply is too long: %s"), rs->buf);
3916 /* Save the size of the packet sent to us by the target. It is used
3917 as a heuristic when determining the max size of packets that the
3918 target can safely receive. */
3919 if (rsa->actual_register_packet_size == 0)
3920 rsa->actual_register_packet_size = buf_len;
3922 /* If this is smaller than we guessed the 'g' packet would be,
3923 update our records. A 'g' reply that doesn't include a register's
3924 value implies either that the register is not available, or that
3925 the 'p' packet must be used. */
3926 if (buf_len < 2 * rsa->sizeof_g_packet)
3928 rsa->sizeof_g_packet = buf_len / 2;
3930 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
3932 if (rsa->regs[i].pnum == -1)
3933 continue;
3935 if (rsa->regs[i].offset >= rsa->sizeof_g_packet)
3936 rsa->regs[i].in_g_packet = 0;
3937 else
3938 rsa->regs[i].in_g_packet = 1;
3942 regs = alloca (rsa->sizeof_g_packet);
3944 /* Unimplemented registers read as all bits zero. */
3945 memset (regs, 0, rsa->sizeof_g_packet);
3947 /* Reply describes registers byte by byte, each byte encoded as two
3948 hex characters. Suck them all up, then supply them to the
3949 register cacheing/storage mechanism. */
3951 p = rs->buf;
3952 for (i = 0; i < rsa->sizeof_g_packet; i++)
3954 if (p[0] == 0 || p[1] == 0)
3955 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
3956 internal_error (__FILE__, __LINE__,
3957 "unexpected end of 'g' packet reply");
3959 if (p[0] == 'x' && p[1] == 'x')
3960 regs[i] = 0; /* 'x' */
3961 else
3962 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
3963 p += 2;
3967 int i;
3968 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
3970 struct packet_reg *r = &rsa->regs[i];
3971 if (r->in_g_packet)
3973 if (r->offset * 2 >= strlen (rs->buf))
3974 /* This shouldn't happen - we adjusted in_g_packet above. */
3975 internal_error (__FILE__, __LINE__,
3976 "unexpected end of 'g' packet reply");
3977 else if (rs->buf[r->offset * 2] == 'x')
3979 gdb_assert (r->offset * 2 < strlen (rs->buf));
3980 /* The register isn't available, mark it as such (at
3981 the same time setting the value to zero). */
3982 regcache_raw_supply (regcache, r->regnum, NULL);
3984 else
3985 regcache_raw_supply (regcache, r->regnum,
3986 regs + r->offset);
3992 static void
3993 fetch_registers_using_g (struct regcache *regcache)
3995 send_g_packet ();
3996 process_g_packet (regcache);
3999 static void
4000 remote_fetch_registers (struct regcache *regcache, int regnum)
4002 struct remote_state *rs = get_remote_state ();
4003 struct remote_arch_state *rsa = get_remote_arch_state ();
4004 int i;
4006 set_thread (PIDGET (inferior_ptid), 1);
4008 if (regnum >= 0)
4010 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
4011 gdb_assert (reg != NULL);
4013 /* If this register might be in the 'g' packet, try that first -
4014 we are likely to read more than one register. If this is the
4015 first 'g' packet, we might be overly optimistic about its
4016 contents, so fall back to 'p'. */
4017 if (reg->in_g_packet)
4019 fetch_registers_using_g (regcache);
4020 if (reg->in_g_packet)
4021 return;
4024 if (fetch_register_using_p (regcache, reg))
4025 return;
4027 /* This register is not available. */
4028 regcache_raw_supply (regcache, reg->regnum, NULL);
4030 return;
4033 fetch_registers_using_g (regcache);
4035 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
4036 if (!rsa->regs[i].in_g_packet)
4037 if (!fetch_register_using_p (regcache, &rsa->regs[i]))
4039 /* This register is not available. */
4040 regcache_raw_supply (regcache, i, NULL);
4044 /* Prepare to store registers. Since we may send them all (using a
4045 'G' request), we have to read out the ones we don't want to change
4046 first. */
4048 static void
4049 remote_prepare_to_store (struct regcache *regcache)
4051 struct remote_arch_state *rsa = get_remote_arch_state ();
4052 int i;
4053 gdb_byte buf[MAX_REGISTER_SIZE];
4055 /* Make sure the entire registers array is valid. */
4056 switch (remote_protocol_packets[PACKET_P].support)
4058 case PACKET_DISABLE:
4059 case PACKET_SUPPORT_UNKNOWN:
4060 /* Make sure all the necessary registers are cached. */
4061 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
4062 if (rsa->regs[i].in_g_packet)
4063 regcache_raw_read (regcache, rsa->regs[i].regnum, buf);
4064 break;
4065 case PACKET_ENABLE:
4066 break;
4070 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
4071 packet was not recognized. */
4073 static int
4074 store_register_using_P (const struct regcache *regcache, struct packet_reg *reg)
4076 struct gdbarch *gdbarch = get_regcache_arch (regcache);
4077 struct remote_state *rs = get_remote_state ();
4078 struct remote_arch_state *rsa = get_remote_arch_state ();
4079 /* Try storing a single register. */
4080 char *buf = rs->buf;
4081 gdb_byte regp[MAX_REGISTER_SIZE];
4082 char *p;
4084 if (remote_protocol_packets[PACKET_P].support == PACKET_DISABLE)
4085 return 0;
4087 if (reg->pnum == -1)
4088 return 0;
4090 xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0));
4091 p = buf + strlen (buf);
4092 regcache_raw_collect (regcache, reg->regnum, regp);
4093 bin2hex (regp, p, register_size (gdbarch, reg->regnum));
4094 remote_send (&rs->buf, &rs->buf_size);
4096 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P]))
4098 case PACKET_OK:
4099 return 1;
4100 case PACKET_ERROR:
4101 error (_("Could not write register \"%s\""),
4102 gdbarch_register_name (gdbarch, reg->regnum));
4103 case PACKET_UNKNOWN:
4104 return 0;
4105 default:
4106 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
4110 /* Store register REGNUM, or all registers if REGNUM == -1, from the
4111 contents of the register cache buffer. FIXME: ignores errors. */
4113 static void
4114 store_registers_using_G (const struct regcache *regcache)
4116 struct remote_state *rs = get_remote_state ();
4117 struct remote_arch_state *rsa = get_remote_arch_state ();
4118 gdb_byte *regs;
4119 char *p;
4121 /* Extract all the registers in the regcache copying them into a
4122 local buffer. */
4124 int i;
4125 regs = alloca (rsa->sizeof_g_packet);
4126 memset (regs, 0, rsa->sizeof_g_packet);
4127 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
4129 struct packet_reg *r = &rsa->regs[i];
4130 if (r->in_g_packet)
4131 regcache_raw_collect (regcache, r->regnum, regs + r->offset);
4135 /* Command describes registers byte by byte,
4136 each byte encoded as two hex characters. */
4137 p = rs->buf;
4138 *p++ = 'G';
4139 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
4140 updated. */
4141 bin2hex (regs, p, rsa->sizeof_g_packet);
4142 remote_send (&rs->buf, &rs->buf_size);
4145 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
4146 of the register cache buffer. FIXME: ignores errors. */
4148 static void
4149 remote_store_registers (struct regcache *regcache, int regnum)
4151 struct remote_state *rs = get_remote_state ();
4152 struct remote_arch_state *rsa = get_remote_arch_state ();
4153 int i;
4155 set_thread (PIDGET (inferior_ptid), 1);
4157 if (regnum >= 0)
4159 struct packet_reg *reg = packet_reg_from_regnum (rsa, regnum);
4160 gdb_assert (reg != NULL);
4162 /* Always prefer to store registers using the 'P' packet if
4163 possible; we often change only a small number of registers.
4164 Sometimes we change a larger number; we'd need help from a
4165 higher layer to know to use 'G'. */
4166 if (store_register_using_P (regcache, reg))
4167 return;
4169 /* For now, don't complain if we have no way to write the
4170 register. GDB loses track of unavailable registers too
4171 easily. Some day, this may be an error. We don't have
4172 any way to read the register, either... */
4173 if (!reg->in_g_packet)
4174 return;
4176 store_registers_using_G (regcache);
4177 return;
4180 store_registers_using_G (regcache);
4182 for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
4183 if (!rsa->regs[i].in_g_packet)
4184 if (!store_register_using_P (regcache, &rsa->regs[i]))
4185 /* See above for why we do not issue an error here. */
4186 continue;
4190 /* Return the number of hex digits in num. */
4192 static int
4193 hexnumlen (ULONGEST num)
4195 int i;
4197 for (i = 0; num != 0; i++)
4198 num >>= 4;
4200 return max (i, 1);
4203 /* Set BUF to the minimum number of hex digits representing NUM. */
4205 static int
4206 hexnumstr (char *buf, ULONGEST num)
4208 int len = hexnumlen (num);
4209 return hexnumnstr (buf, num, len);
4213 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
4215 static int
4216 hexnumnstr (char *buf, ULONGEST num, int width)
4218 int i;
4220 buf[width] = '\0';
4222 for (i = width - 1; i >= 0; i--)
4224 buf[i] = "0123456789abcdef"[(num & 0xf)];
4225 num >>= 4;
4228 return width;
4231 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
4233 static CORE_ADDR
4234 remote_address_masked (CORE_ADDR addr)
4236 int address_size = remote_address_size;
4237 /* If "remoteaddresssize" was not set, default to target address size. */
4238 if (!address_size)
4239 address_size = gdbarch_addr_bit (current_gdbarch);
4241 if (address_size > 0
4242 && address_size < (sizeof (ULONGEST) * 8))
4244 /* Only create a mask when that mask can safely be constructed
4245 in a ULONGEST variable. */
4246 ULONGEST mask = 1;
4247 mask = (mask << address_size) - 1;
4248 addr &= mask;
4250 return addr;
4253 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
4254 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
4255 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
4256 (which may be more than *OUT_LEN due to escape characters). The
4257 total number of bytes in the output buffer will be at most
4258 OUT_MAXLEN. */
4260 static int
4261 remote_escape_output (const gdb_byte *buffer, int len,
4262 gdb_byte *out_buf, int *out_len,
4263 int out_maxlen)
4265 int input_index, output_index;
4267 output_index = 0;
4268 for (input_index = 0; input_index < len; input_index++)
4270 gdb_byte b = buffer[input_index];
4272 if (b == '$' || b == '#' || b == '}')
4274 /* These must be escaped. */
4275 if (output_index + 2 > out_maxlen)
4276 break;
4277 out_buf[output_index++] = '}';
4278 out_buf[output_index++] = b ^ 0x20;
4280 else
4282 if (output_index + 1 > out_maxlen)
4283 break;
4284 out_buf[output_index++] = b;
4288 *out_len = input_index;
4289 return output_index;
4292 /* Convert BUFFER, escaped data LEN bytes long, into binary data
4293 in OUT_BUF. Return the number of bytes written to OUT_BUF.
4294 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
4296 This function reverses remote_escape_output. It allows more
4297 escaped characters than that function does, in particular because
4298 '*' must be escaped to avoid the run-length encoding processing
4299 in reading packets. */
4301 static int
4302 remote_unescape_input (const gdb_byte *buffer, int len,
4303 gdb_byte *out_buf, int out_maxlen)
4305 int input_index, output_index;
4306 int escaped;
4308 output_index = 0;
4309 escaped = 0;
4310 for (input_index = 0; input_index < len; input_index++)
4312 gdb_byte b = buffer[input_index];
4314 if (output_index + 1 > out_maxlen)
4316 warning (_("Received too much data from remote target;"
4317 " ignoring overflow."));
4318 return output_index;
4321 if (escaped)
4323 out_buf[output_index++] = b ^ 0x20;
4324 escaped = 0;
4326 else if (b == '}')
4327 escaped = 1;
4328 else
4329 out_buf[output_index++] = b;
4332 if (escaped)
4333 error (_("Unmatched escape character in target response."));
4335 return output_index;
4338 /* Determine whether the remote target supports binary downloading.
4339 This is accomplished by sending a no-op memory write of zero length
4340 to the target at the specified address. It does not suffice to send
4341 the whole packet, since many stubs strip the eighth bit and
4342 subsequently compute a wrong checksum, which causes real havoc with
4343 remote_write_bytes.
4345 NOTE: This can still lose if the serial line is not eight-bit
4346 clean. In cases like this, the user should clear "remote
4347 X-packet". */
4349 static void
4350 check_binary_download (CORE_ADDR addr)
4352 struct remote_state *rs = get_remote_state ();
4354 switch (remote_protocol_packets[PACKET_X].support)
4356 case PACKET_DISABLE:
4357 break;
4358 case PACKET_ENABLE:
4359 break;
4360 case PACKET_SUPPORT_UNKNOWN:
4362 char *p;
4364 p = rs->buf;
4365 *p++ = 'X';
4366 p += hexnumstr (p, (ULONGEST) addr);
4367 *p++ = ',';
4368 p += hexnumstr (p, (ULONGEST) 0);
4369 *p++ = ':';
4370 *p = '\0';
4372 putpkt_binary (rs->buf, (int) (p - rs->buf));
4373 getpkt (&rs->buf, &rs->buf_size, 0);
4375 if (rs->buf[0] == '\0')
4377 if (remote_debug)
4378 fprintf_unfiltered (gdb_stdlog,
4379 "binary downloading NOT suppported by target\n");
4380 remote_protocol_packets[PACKET_X].support = PACKET_DISABLE;
4382 else
4384 if (remote_debug)
4385 fprintf_unfiltered (gdb_stdlog,
4386 "binary downloading suppported by target\n");
4387 remote_protocol_packets[PACKET_X].support = PACKET_ENABLE;
4389 break;
4394 /* Write memory data directly to the remote machine.
4395 This does not inform the data cache; the data cache uses this.
4396 HEADER is the starting part of the packet.
4397 MEMADDR is the address in the remote memory space.
4398 MYADDR is the address of the buffer in our space.
4399 LEN is the number of bytes.
4400 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
4401 should send data as binary ('X'), or hex-encoded ('M').
4403 The function creates packet of the form
4404 <HEADER><ADDRESS>,<LENGTH>:<DATA>
4406 where encoding of <DATA> is termined by PACKET_FORMAT.
4408 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
4409 are omitted.
4411 Returns the number of bytes transferred, or 0 (setting errno) for
4412 error. Only transfer a single packet. */
4414 static int
4415 remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
4416 const gdb_byte *myaddr, int len,
4417 char packet_format, int use_length)
4419 struct remote_state *rs = get_remote_state ();
4420 char *p;
4421 char *plen = NULL;
4422 int plenlen = 0;
4423 int todo;
4424 int nr_bytes;
4425 int payload_size;
4426 int payload_length;
4427 int header_length;
4429 if (packet_format != 'X' && packet_format != 'M')
4430 internal_error (__FILE__, __LINE__,
4431 "remote_write_bytes_aux: bad packet format");
4433 if (len <= 0)
4434 return 0;
4436 payload_size = get_memory_write_packet_size ();
4438 /* The packet buffer will be large enough for the payload;
4439 get_memory_packet_size ensures this. */
4440 rs->buf[0] = '\0';
4442 /* Compute the size of the actual payload by subtracting out the
4443 packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
4445 payload_size -= strlen ("$,:#NN");
4446 if (!use_length)
4447 /* The comma won't be used. */
4448 payload_size += 1;
4449 header_length = strlen (header);
4450 payload_size -= header_length;
4451 payload_size -= hexnumlen (memaddr);
4453 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
4455 strcat (rs->buf, header);
4456 p = rs->buf + strlen (header);
4458 /* Compute a best guess of the number of bytes actually transfered. */
4459 if (packet_format == 'X')
4461 /* Best guess at number of bytes that will fit. */
4462 todo = min (len, payload_size);
4463 if (use_length)
4464 payload_size -= hexnumlen (todo);
4465 todo = min (todo, payload_size);
4467 else
4469 /* Num bytes that will fit. */
4470 todo = min (len, payload_size / 2);
4471 if (use_length)
4472 payload_size -= hexnumlen (todo);
4473 todo = min (todo, payload_size / 2);
4476 if (todo <= 0)
4477 internal_error (__FILE__, __LINE__,
4478 _("minumum packet size too small to write data"));
4480 /* If we already need another packet, then try to align the end
4481 of this packet to a useful boundary. */
4482 if (todo > 2 * REMOTE_ALIGN_WRITES && todo < len)
4483 todo = ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr;
4485 /* Append "<memaddr>". */
4486 memaddr = remote_address_masked (memaddr);
4487 p += hexnumstr (p, (ULONGEST) memaddr);
4489 if (use_length)
4491 /* Append ",". */
4492 *p++ = ',';
4494 /* Append <len>. Retain the location/size of <len>. It may need to
4495 be adjusted once the packet body has been created. */
4496 plen = p;
4497 plenlen = hexnumstr (p, (ULONGEST) todo);
4498 p += plenlen;
4501 /* Append ":". */
4502 *p++ = ':';
4503 *p = '\0';
4505 /* Append the packet body. */
4506 if (packet_format == 'X')
4508 /* Binary mode. Send target system values byte by byte, in
4509 increasing byte addresses. Only escape certain critical
4510 characters. */
4511 payload_length = remote_escape_output (myaddr, todo, p, &nr_bytes,
4512 payload_size);
4514 /* If not all TODO bytes fit, then we'll need another packet. Make
4515 a second try to keep the end of the packet aligned. Don't do
4516 this if the packet is tiny. */
4517 if (nr_bytes < todo && nr_bytes > 2 * REMOTE_ALIGN_WRITES)
4519 int new_nr_bytes;
4521 new_nr_bytes = (((memaddr + nr_bytes) & ~(REMOTE_ALIGN_WRITES - 1))
4522 - memaddr);
4523 if (new_nr_bytes != nr_bytes)
4524 payload_length = remote_escape_output (myaddr, new_nr_bytes,
4525 p, &nr_bytes,
4526 payload_size);
4529 p += payload_length;
4530 if (use_length && nr_bytes < todo)
4532 /* Escape chars have filled up the buffer prematurely,
4533 and we have actually sent fewer bytes than planned.
4534 Fix-up the length field of the packet. Use the same
4535 number of characters as before. */
4536 plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen);
4537 *plen = ':'; /* overwrite \0 from hexnumnstr() */
4540 else
4542 /* Normal mode: Send target system values byte by byte, in
4543 increasing byte addresses. Each byte is encoded as a two hex
4544 value. */
4545 nr_bytes = bin2hex (myaddr, p, todo);
4546 p += 2 * nr_bytes;
4549 putpkt_binary (rs->buf, (int) (p - rs->buf));
4550 getpkt (&rs->buf, &rs->buf_size, 0);
4552 if (rs->buf[0] == 'E')
4554 /* There is no correspondance between what the remote protocol
4555 uses for errors and errno codes. We would like a cleaner way
4556 of representing errors (big enough to include errno codes,
4557 bfd_error codes, and others). But for now just return EIO. */
4558 errno = EIO;
4559 return 0;
4562 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
4563 fewer bytes than we'd planned. */
4564 return nr_bytes;
4567 /* Write memory data directly to the remote machine.
4568 This does not inform the data cache; the data cache uses this.
4569 MEMADDR is the address in the remote memory space.
4570 MYADDR is the address of the buffer in our space.
4571 LEN is the number of bytes.
4573 Returns number of bytes transferred, or 0 (setting errno) for
4574 error. Only transfer a single packet. */
4577 remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
4579 char *packet_format = 0;
4581 /* Check whether the target supports binary download. */
4582 check_binary_download (memaddr);
4584 switch (remote_protocol_packets[PACKET_X].support)
4586 case PACKET_ENABLE:
4587 packet_format = "X";
4588 break;
4589 case PACKET_DISABLE:
4590 packet_format = "M";
4591 break;
4592 case PACKET_SUPPORT_UNKNOWN:
4593 internal_error (__FILE__, __LINE__,
4594 _("remote_write_bytes: bad internal state"));
4595 default:
4596 internal_error (__FILE__, __LINE__, _("bad switch"));
4599 return remote_write_bytes_aux (packet_format,
4600 memaddr, myaddr, len, packet_format[0], 1);
4603 /* Read memory data directly from the remote machine.
4604 This does not use the data cache; the data cache uses this.
4605 MEMADDR is the address in the remote memory space.
4606 MYADDR is the address of the buffer in our space.
4607 LEN is the number of bytes.
4609 Returns number of bytes transferred, or 0 for error. */
4611 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
4612 remote targets) shouldn't attempt to read the entire buffer.
4613 Instead it should read a single packet worth of data and then
4614 return the byte size of that packet to the caller. The caller (its
4615 caller and its callers caller ;-) already contains code for
4616 handling partial reads. */
4619 remote_read_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
4621 struct remote_state *rs = get_remote_state ();
4622 int max_buf_size; /* Max size of packet output buffer. */
4623 int origlen;
4625 if (len <= 0)
4626 return 0;
4628 max_buf_size = get_memory_read_packet_size ();
4629 /* The packet buffer will be large enough for the payload;
4630 get_memory_packet_size ensures this. */
4632 origlen = len;
4633 while (len > 0)
4635 char *p;
4636 int todo;
4637 int i;
4639 todo = min (len, max_buf_size / 2); /* num bytes that will fit */
4641 /* construct "m"<memaddr>","<len>" */
4642 /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */
4643 memaddr = remote_address_masked (memaddr);
4644 p = rs->buf;
4645 *p++ = 'm';
4646 p += hexnumstr (p, (ULONGEST) memaddr);
4647 *p++ = ',';
4648 p += hexnumstr (p, (ULONGEST) todo);
4649 *p = '\0';
4651 putpkt (rs->buf);
4652 getpkt (&rs->buf, &rs->buf_size, 0);
4654 if (rs->buf[0] == 'E'
4655 && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2])
4656 && rs->buf[3] == '\0')
4658 /* There is no correspondance between what the remote
4659 protocol uses for errors and errno codes. We would like
4660 a cleaner way of representing errors (big enough to
4661 include errno codes, bfd_error codes, and others). But
4662 for now just return EIO. */
4663 errno = EIO;
4664 return 0;
4667 /* Reply describes memory byte by byte,
4668 each byte encoded as two hex characters. */
4670 p = rs->buf;
4671 if ((i = hex2bin (p, myaddr, todo)) < todo)
4673 /* Reply is short. This means that we were able to read
4674 only part of what we wanted to. */
4675 return i + (origlen - len);
4677 myaddr += todo;
4678 memaddr += todo;
4679 len -= todo;
4681 return origlen;
4684 /* Read or write LEN bytes from inferior memory at MEMADDR,
4685 transferring to or from debugger address BUFFER. Write to inferior
4686 if SHOULD_WRITE is nonzero. Returns length of data written or
4687 read; 0 for error. TARGET is unused. */
4689 static int
4690 remote_xfer_memory (CORE_ADDR mem_addr, gdb_byte *buffer, int mem_len,
4691 int should_write, struct mem_attrib *attrib,
4692 struct target_ops *target)
4694 int res;
4696 if (should_write)
4697 res = remote_write_bytes (mem_addr, buffer, mem_len);
4698 else
4699 res = remote_read_bytes (mem_addr, buffer, mem_len);
4701 return res;
4704 /* Sends a packet with content determined by the printf format string
4705 FORMAT and the remaining arguments, then gets the reply. Returns
4706 whether the packet was a success, a failure, or unknown. */
4708 enum packet_result
4709 remote_send_printf (const char *format, ...)
4711 struct remote_state *rs = get_remote_state ();
4712 int max_size = get_remote_packet_size ();
4714 va_list ap;
4715 va_start (ap, format);
4717 rs->buf[0] = '\0';
4718 if (vsnprintf (rs->buf, max_size, format, ap) >= max_size)
4719 internal_error (__FILE__, __LINE__, "Too long remote packet.");
4721 if (putpkt (rs->buf) < 0)
4722 error (_("Communication problem with target."));
4724 rs->buf[0] = '\0';
4725 getpkt (&rs->buf, &rs->buf_size, 0);
4727 return packet_check_result (rs->buf);
4730 static void
4731 restore_remote_timeout (void *p)
4733 int value = *(int *)p;
4734 remote_timeout = value;
4737 /* Flash writing can take quite some time. We'll set
4738 effectively infinite timeout for flash operations.
4739 In future, we'll need to decide on a better approach. */
4740 static const int remote_flash_timeout = 1000;
4742 static void
4743 remote_flash_erase (struct target_ops *ops,
4744 ULONGEST address, LONGEST length)
4746 int saved_remote_timeout = remote_timeout;
4747 enum packet_result ret;
4749 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
4750 &saved_remote_timeout);
4751 remote_timeout = remote_flash_timeout;
4753 ret = remote_send_printf ("vFlashErase:%s,%s",
4754 paddr (address),
4755 phex (length, 4));
4756 switch (ret)
4758 case PACKET_UNKNOWN:
4759 error (_("Remote target does not support flash erase"));
4760 case PACKET_ERROR:
4761 error (_("Error erasing flash with vFlashErase packet"));
4762 default:
4763 break;
4766 do_cleanups (back_to);
4769 static LONGEST
4770 remote_flash_write (struct target_ops *ops,
4771 ULONGEST address, LONGEST length,
4772 const gdb_byte *data)
4774 int saved_remote_timeout = remote_timeout;
4775 int ret;
4776 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
4777 &saved_remote_timeout);
4779 remote_timeout = remote_flash_timeout;
4780 ret = remote_write_bytes_aux ("vFlashWrite:", address, data, length, 'X', 0);
4781 do_cleanups (back_to);
4783 return ret;
4786 static void
4787 remote_flash_done (struct target_ops *ops)
4789 int saved_remote_timeout = remote_timeout;
4790 int ret;
4791 struct cleanup *back_to = make_cleanup (restore_remote_timeout,
4792 &saved_remote_timeout);
4794 remote_timeout = remote_flash_timeout;
4795 ret = remote_send_printf ("vFlashDone");
4796 do_cleanups (back_to);
4798 switch (ret)
4800 case PACKET_UNKNOWN:
4801 error (_("Remote target does not support vFlashDone"));
4802 case PACKET_ERROR:
4803 error (_("Error finishing flash operation"));
4804 default:
4805 break;
4809 static void
4810 remote_files_info (struct target_ops *ignore)
4812 puts_filtered ("Debugging a target over a serial line.\n");
4815 /* Stuff for dealing with the packets which are part of this protocol.
4816 See comment at top of file for details. */
4818 /* Read a single character from the remote end. */
4820 static int
4821 readchar (int timeout)
4823 int ch;
4825 ch = serial_readchar (remote_desc, timeout);
4827 if (ch >= 0)
4828 return ch;
4830 switch ((enum serial_rc) ch)
4832 case SERIAL_EOF:
4833 target_mourn_inferior ();
4834 error (_("Remote connection closed"));
4835 /* no return */
4836 case SERIAL_ERROR:
4837 perror_with_name (_("Remote communication error"));
4838 /* no return */
4839 case SERIAL_TIMEOUT:
4840 break;
4842 return ch;
4845 /* Send the command in *BUF to the remote machine, and read the reply
4846 into *BUF. Report an error if we get an error reply. Resize
4847 *BUF using xrealloc if necessary to hold the result, and update
4848 *SIZEOF_BUF. */
4850 static void
4851 remote_send (char **buf,
4852 long *sizeof_buf)
4854 putpkt (*buf);
4855 getpkt (buf, sizeof_buf, 0);
4857 if ((*buf)[0] == 'E')
4858 error (_("Remote failure reply: %s"), *buf);
4861 /* Display a null-terminated packet on stdout, for debugging, using C
4862 string notation. */
4864 static void
4865 print_packet (char *buf)
4867 puts_filtered ("\"");
4868 fputstr_filtered (buf, '"', gdb_stdout);
4869 puts_filtered ("\"");
4873 putpkt (char *buf)
4875 return putpkt_binary (buf, strlen (buf));
4878 /* Send a packet to the remote machine, with error checking. The data
4879 of the packet is in BUF. The string in BUF can be at most
4880 get_remote_packet_size () - 5 to account for the $, # and checksum,
4881 and for a possible /0 if we are debugging (remote_debug) and want
4882 to print the sent packet as a string. */
4884 static int
4885 putpkt_binary (char *buf, int cnt)
4887 struct remote_state *rs = get_remote_state ();
4888 int i;
4889 unsigned char csum = 0;
4890 char *buf2 = alloca (cnt + 6);
4892 int ch;
4893 int tcount = 0;
4894 char *p;
4896 /* We're sending out a new packet. Make sure we don't look at a
4897 stale cached response. */
4898 rs->cached_wait_status = 0;
4900 /* Copy the packet into buffer BUF2, encapsulating it
4901 and giving it a checksum. */
4903 p = buf2;
4904 *p++ = '$';
4906 for (i = 0; i < cnt; i++)
4908 csum += buf[i];
4909 *p++ = buf[i];
4911 *p++ = '#';
4912 *p++ = tohex ((csum >> 4) & 0xf);
4913 *p++ = tohex (csum & 0xf);
4915 /* Send it over and over until we get a positive ack. */
4917 while (1)
4919 int started_error_output = 0;
4921 if (remote_debug)
4923 *p = '\0';
4924 fprintf_unfiltered (gdb_stdlog, "Sending packet: ");
4925 fputstrn_unfiltered (buf2, p - buf2, 0, gdb_stdlog);
4926 fprintf_unfiltered (gdb_stdlog, "...");
4927 gdb_flush (gdb_stdlog);
4929 if (serial_write (remote_desc, buf2, p - buf2))
4930 perror_with_name (_("putpkt: write failed"));
4932 /* Read until either a timeout occurs (-2) or '+' is read. */
4933 while (1)
4935 ch = readchar (remote_timeout);
4937 if (remote_debug)
4939 switch (ch)
4941 case '+':
4942 case '-':
4943 case SERIAL_TIMEOUT:
4944 case '$':
4945 if (started_error_output)
4947 putchar_unfiltered ('\n');
4948 started_error_output = 0;
4953 switch (ch)
4955 case '+':
4956 if (remote_debug)
4957 fprintf_unfiltered (gdb_stdlog, "Ack\n");
4958 return 1;
4959 case '-':
4960 if (remote_debug)
4961 fprintf_unfiltered (gdb_stdlog, "Nak\n");
4962 case SERIAL_TIMEOUT:
4963 tcount++;
4964 if (tcount > 3)
4965 return 0;
4966 break; /* Retransmit buffer. */
4967 case '$':
4969 if (remote_debug)
4970 fprintf_unfiltered (gdb_stdlog,
4971 "Packet instead of Ack, ignoring it\n");
4972 /* It's probably an old response sent because an ACK
4973 was lost. Gobble up the packet and ack it so it
4974 doesn't get retransmitted when we resend this
4975 packet. */
4976 skip_frame ();
4977 serial_write (remote_desc, "+", 1);
4978 continue; /* Now, go look for +. */
4980 default:
4981 if (remote_debug)
4983 if (!started_error_output)
4985 started_error_output = 1;
4986 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
4988 fputc_unfiltered (ch & 0177, gdb_stdlog);
4990 continue;
4992 break; /* Here to retransmit. */
4995 #if 0
4996 /* This is wrong. If doing a long backtrace, the user should be
4997 able to get out next time we call QUIT, without anything as
4998 violent as interrupt_query. If we want to provide a way out of
4999 here without getting to the next QUIT, it should be based on
5000 hitting ^C twice as in remote_wait. */
5001 if (quit_flag)
5003 quit_flag = 0;
5004 interrupt_query ();
5006 #endif
5010 /* Come here after finding the start of a frame when we expected an
5011 ack. Do our best to discard the rest of this packet. */
5013 static void
5014 skip_frame (void)
5016 int c;
5018 while (1)
5020 c = readchar (remote_timeout);
5021 switch (c)
5023 case SERIAL_TIMEOUT:
5024 /* Nothing we can do. */
5025 return;
5026 case '#':
5027 /* Discard the two bytes of checksum and stop. */
5028 c = readchar (remote_timeout);
5029 if (c >= 0)
5030 c = readchar (remote_timeout);
5032 return;
5033 case '*': /* Run length encoding. */
5034 /* Discard the repeat count. */
5035 c = readchar (remote_timeout);
5036 if (c < 0)
5037 return;
5038 break;
5039 default:
5040 /* A regular character. */
5041 break;
5046 /* Come here after finding the start of the frame. Collect the rest
5047 into *BUF, verifying the checksum, length, and handling run-length
5048 compression. NUL terminate the buffer. If there is not enough room,
5049 expand *BUF using xrealloc.
5051 Returns -1 on error, number of characters in buffer (ignoring the
5052 trailing NULL) on success. (could be extended to return one of the
5053 SERIAL status indications). */
5055 static long
5056 read_frame (char **buf_p,
5057 long *sizeof_buf)
5059 unsigned char csum;
5060 long bc;
5061 int c;
5062 char *buf = *buf_p;
5064 csum = 0;
5065 bc = 0;
5067 while (1)
5069 c = readchar (remote_timeout);
5070 switch (c)
5072 case SERIAL_TIMEOUT:
5073 if (remote_debug)
5074 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
5075 return -1;
5076 case '$':
5077 if (remote_debug)
5078 fputs_filtered ("Saw new packet start in middle of old one\n",
5079 gdb_stdlog);
5080 return -1; /* Start a new packet, count retries. */
5081 case '#':
5083 unsigned char pktcsum;
5084 int check_0 = 0;
5085 int check_1 = 0;
5087 buf[bc] = '\0';
5089 check_0 = readchar (remote_timeout);
5090 if (check_0 >= 0)
5091 check_1 = readchar (remote_timeout);
5093 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
5095 if (remote_debug)
5096 fputs_filtered ("Timeout in checksum, retrying\n",
5097 gdb_stdlog);
5098 return -1;
5100 else if (check_0 < 0 || check_1 < 0)
5102 if (remote_debug)
5103 fputs_filtered ("Communication error in checksum\n",
5104 gdb_stdlog);
5105 return -1;
5108 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
5109 if (csum == pktcsum)
5110 return bc;
5112 if (remote_debug)
5114 fprintf_filtered (gdb_stdlog,
5115 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
5116 pktcsum, csum);
5117 fputstrn_filtered (buf, bc, 0, gdb_stdlog);
5118 fputs_filtered ("\n", gdb_stdlog);
5120 /* Number of characters in buffer ignoring trailing
5121 NULL. */
5122 return -1;
5124 case '*': /* Run length encoding. */
5126 int repeat;
5127 csum += c;
5129 c = readchar (remote_timeout);
5130 csum += c;
5131 repeat = c - ' ' + 3; /* Compute repeat count. */
5133 /* The character before ``*'' is repeated. */
5135 if (repeat > 0 && repeat <= 255 && bc > 0)
5137 if (bc + repeat - 1 >= *sizeof_buf - 1)
5139 /* Make some more room in the buffer. */
5140 *sizeof_buf += repeat;
5141 *buf_p = xrealloc (*buf_p, *sizeof_buf);
5142 buf = *buf_p;
5145 memset (&buf[bc], buf[bc - 1], repeat);
5146 bc += repeat;
5147 continue;
5150 buf[bc] = '\0';
5151 printf_filtered (_("Invalid run length encoding: %s\n"), buf);
5152 return -1;
5154 default:
5155 if (bc >= *sizeof_buf - 1)
5157 /* Make some more room in the buffer. */
5158 *sizeof_buf *= 2;
5159 *buf_p = xrealloc (*buf_p, *sizeof_buf);
5160 buf = *buf_p;
5163 buf[bc++] = c;
5164 csum += c;
5165 continue;
5170 /* Read a packet from the remote machine, with error checking, and
5171 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
5172 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
5173 rather than timing out; this is used (in synchronous mode) to wait
5174 for a target that is is executing user code to stop. */
5175 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
5176 don't have to change all the calls to getpkt to deal with the
5177 return value, because at the moment I don't know what the right
5178 thing to do it for those. */
5179 void
5180 getpkt (char **buf,
5181 long *sizeof_buf,
5182 int forever)
5184 int timed_out;
5186 timed_out = getpkt_sane (buf, sizeof_buf, forever);
5190 /* Read a packet from the remote machine, with error checking, and
5191 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
5192 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
5193 rather than timing out; this is used (in synchronous mode) to wait
5194 for a target that is is executing user code to stop. If FOREVER ==
5195 0, this function is allowed to time out gracefully and return an
5196 indication of this to the caller. Otherwise return the number
5197 of bytes read. */
5198 static int
5199 getpkt_sane (char **buf, long *sizeof_buf, int forever)
5201 struct remote_state *rs = get_remote_state ();
5202 int c;
5203 int tries;
5204 int timeout;
5205 int val;
5207 /* We're reading a new response. Make sure we don't look at a
5208 previously cached response. */
5209 rs->cached_wait_status = 0;
5211 strcpy (*buf, "timeout");
5213 if (forever)
5215 timeout = watchdog > 0 ? watchdog : -1;
5218 else
5219 timeout = remote_timeout;
5221 #define MAX_TRIES 3
5223 for (tries = 1; tries <= MAX_TRIES; tries++)
5225 /* This can loop forever if the remote side sends us characters
5226 continuously, but if it pauses, we'll get a zero from
5227 readchar because of timeout. Then we'll count that as a
5228 retry. */
5230 /* Note that we will only wait forever prior to the start of a
5231 packet. After that, we expect characters to arrive at a
5232 brisk pace. They should show up within remote_timeout
5233 intervals. */
5237 c = readchar (timeout);
5239 if (c == SERIAL_TIMEOUT)
5241 if (forever) /* Watchdog went off? Kill the target. */
5243 QUIT;
5244 target_mourn_inferior ();
5245 error (_("Watchdog timeout has expired. Target detached."));
5247 if (remote_debug)
5248 fputs_filtered ("Timed out.\n", gdb_stdlog);
5249 goto retry;
5252 while (c != '$');
5254 /* We've found the start of a packet, now collect the data. */
5256 val = read_frame (buf, sizeof_buf);
5258 if (val >= 0)
5260 if (remote_debug)
5262 fprintf_unfiltered (gdb_stdlog, "Packet received: ");
5263 fputstrn_unfiltered (*buf, val, 0, gdb_stdlog);
5264 fprintf_unfiltered (gdb_stdlog, "\n");
5266 serial_write (remote_desc, "+", 1);
5267 return val;
5270 /* Try the whole thing again. */
5271 retry:
5272 serial_write (remote_desc, "-", 1);
5275 /* We have tried hard enough, and just can't receive the packet.
5276 Give up. */
5278 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
5279 serial_write (remote_desc, "+", 1);
5280 return -1;
5283 static void
5284 remote_kill (void)
5286 /* For some mysterious reason, wait_for_inferior calls kill instead of
5287 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
5288 if (kill_kludge)
5290 kill_kludge = 0;
5291 target_mourn_inferior ();
5292 return;
5295 /* Use catch_errors so the user can quit from gdb even when we aren't on
5296 speaking terms with the remote system. */
5297 catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
5299 /* Don't wait for it to die. I'm not really sure it matters whether
5300 we do or not. For the existing stubs, kill is a noop. */
5301 target_mourn_inferior ();
5304 /* Async version of remote_kill. */
5305 static void
5306 remote_async_kill (void)
5308 /* Unregister the file descriptor from the event loop. */
5309 if (target_is_async_p ())
5310 serial_async (remote_desc, NULL, 0);
5312 /* For some mysterious reason, wait_for_inferior calls kill instead of
5313 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
5314 if (kill_kludge)
5316 kill_kludge = 0;
5317 target_mourn_inferior ();
5318 return;
5321 /* Use catch_errors so the user can quit from gdb even when we
5322 aren't on speaking terms with the remote system. */
5323 catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
5325 /* Don't wait for it to die. I'm not really sure it matters whether
5326 we do or not. For the existing stubs, kill is a noop. */
5327 target_mourn_inferior ();
5330 static void
5331 remote_mourn (void)
5333 remote_mourn_1 (&remote_ops);
5336 static void
5337 remote_async_mourn (void)
5339 remote_mourn_1 (&remote_async_ops);
5342 /* Worker function for remote_mourn. */
5343 static void
5344 remote_mourn_1 (struct target_ops *target)
5346 unpush_target (target);
5347 generic_mourn_inferior ();
5350 static void
5351 extended_remote_mourn_1 (struct target_ops *target)
5353 struct remote_state *rs = get_remote_state ();
5355 /* Unlike "target remote", we do not want to unpush the target; then
5356 the next time the user says "run", we won't be connected. */
5358 /* Call common code to mark the inferior as not running. */
5359 generic_mourn_inferior ();
5361 /* Check whether the target is running now - some remote stubs
5362 automatically restart after kill. */
5363 putpkt ("?");
5364 getpkt (&rs->buf, &rs->buf_size, 0);
5366 if (rs->buf[0] == 'S' || rs->buf[0] == 'T')
5368 /* Assume that the target has been restarted. Set inferior_ptid
5369 so that bits of core GDB realizes there's something here, e.g.,
5370 so that the user can say "kill" again. */
5371 inferior_ptid = pid_to_ptid (MAGIC_NULL_PID);
5373 else
5375 /* Mark this (still pushed) target as not executable until we
5376 restart it. */
5377 target_mark_exited (target);
5381 static void
5382 extended_remote_mourn (void)
5384 extended_remote_mourn_1 (&extended_remote_ops);
5387 static void
5388 extended_async_remote_mourn (void)
5390 extended_remote_mourn_1 (&extended_async_remote_ops);
5393 static int
5394 extended_remote_run (char *args)
5396 struct remote_state *rs = get_remote_state ();
5397 char *p;
5398 int len;
5400 /* If the user has disabled vRun support, or we have detected that
5401 support is not available, do not try it. */
5402 if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE)
5403 return -1;
5405 strcpy (rs->buf, "vRun;");
5406 len = strlen (rs->buf);
5408 if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ())
5409 error (_("Remote file name too long for run packet"));
5410 len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len, 0);
5412 if (*args)
5414 struct cleanup *back_to;
5415 int i;
5416 char **argv;
5418 argv = buildargv (args);
5419 back_to = make_cleanup ((void (*) (void *)) freeargv, argv);
5420 for (i = 0; argv[i] != NULL; i++)
5422 if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ())
5423 error (_("Argument list too long for run packet"));
5424 rs->buf[len++] = ';';
5425 len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len, 0);
5427 do_cleanups (back_to);
5430 rs->buf[len++] = '\0';
5432 putpkt (rs->buf);
5433 getpkt (&rs->buf, &rs->buf_size, 0);
5435 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]) == PACKET_OK)
5437 /* We have a wait response; we don't need it, though. All is well. */
5438 return 0;
5440 else if (remote_protocol_packets[PACKET_vRun].support == PACKET_DISABLE)
5441 /* It wasn't disabled before, but it is now. */
5442 return -1;
5443 else
5445 if (remote_exec_file[0] == '\0')
5446 error (_("Running the default executable on the remote target failed; "
5447 "try \"set remote exec-file\"?"));
5448 else
5449 error (_("Running \"%s\" on the remote target failed"),
5450 remote_exec_file);
5454 /* In the extended protocol we want to be able to do things like
5455 "run" and have them basically work as expected. So we need
5456 a special create_inferior function. We support changing the
5457 executable file and the command line arguments, but not the
5458 environment. */
5460 static void
5461 extended_remote_create_inferior_1 (char *exec_file, char *args,
5462 char **env, int from_tty,
5463 int async_p)
5465 /* If running asynchronously, register the target file descriptor
5466 with the event loop. */
5467 if (async_p && target_can_async_p ())
5468 target_async (inferior_event_handler, 0);
5470 /* Now restart the remote server. */
5471 if (extended_remote_run (args) == -1)
5473 /* vRun was not supported. Fail if we need it to do what the
5474 user requested. */
5475 if (remote_exec_file[0])
5476 error (_("Remote target does not support \"set remote exec-file\""));
5477 if (args[0])
5478 error (_("Remote target does not support \"set args\" or run <ARGS>"));
5480 /* Fall back to "R". */
5481 extended_remote_restart ();
5484 /* Now mark the inferior as running before we do anything else. */
5485 inferior_ptid = pid_to_ptid (MAGIC_NULL_PID);
5486 if (async_p)
5487 target_mark_running (&extended_async_remote_ops);
5488 else
5489 target_mark_running (&extended_remote_ops);
5491 /* Get updated offsets, if the stub uses qOffsets. */
5492 get_offsets ();
5494 /* Clean up from the last time we were running. */
5495 init_thread_list ();
5496 init_wait_for_inferior ();
5499 static void
5500 extended_remote_create_inferior (char *exec_file, char *args,
5501 char **env, int from_tty)
5503 extended_remote_create_inferior_1 (exec_file, args, env, from_tty, 0);
5506 static void
5507 extended_remote_async_create_inferior (char *exec_file, char *args,
5508 char **env, int from_tty)
5510 extended_remote_create_inferior_1 (exec_file, args, env, from_tty, 1);
5514 /* Insert a breakpoint. On targets that have software breakpoint
5515 support, we ask the remote target to do the work; on targets
5516 which don't, we insert a traditional memory breakpoint. */
5518 static int
5519 remote_insert_breakpoint (struct bp_target_info *bp_tgt)
5521 CORE_ADDR addr = bp_tgt->placed_address;
5522 struct remote_state *rs = get_remote_state ();
5524 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
5525 If it succeeds, then set the support to PACKET_ENABLE. If it
5526 fails, and the user has explicitly requested the Z support then
5527 report an error, otherwise, mark it disabled and go on. */
5529 if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE)
5531 char *p = rs->buf;
5533 *(p++) = 'Z';
5534 *(p++) = '0';
5535 *(p++) = ',';
5536 gdbarch_breakpoint_from_pc
5537 (current_gdbarch, &bp_tgt->placed_address, &bp_tgt->placed_size);
5538 addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
5539 p += hexnumstr (p, addr);
5540 sprintf (p, ",%d", bp_tgt->placed_size);
5542 putpkt (rs->buf);
5543 getpkt (&rs->buf, &rs->buf_size, 0);
5545 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0]))
5547 case PACKET_ERROR:
5548 return -1;
5549 case PACKET_OK:
5550 return 0;
5551 case PACKET_UNKNOWN:
5552 break;
5556 return memory_insert_breakpoint (bp_tgt);
5559 static int
5560 remote_remove_breakpoint (struct bp_target_info *bp_tgt)
5562 CORE_ADDR addr = bp_tgt->placed_address;
5563 struct remote_state *rs = get_remote_state ();
5564 int bp_size;
5566 if (remote_protocol_packets[PACKET_Z0].support != PACKET_DISABLE)
5568 char *p = rs->buf;
5570 *(p++) = 'z';
5571 *(p++) = '0';
5572 *(p++) = ',';
5574 addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
5575 p += hexnumstr (p, addr);
5576 sprintf (p, ",%d", bp_tgt->placed_size);
5578 putpkt (rs->buf);
5579 getpkt (&rs->buf, &rs->buf_size, 0);
5581 return (rs->buf[0] == 'E');
5584 return memory_remove_breakpoint (bp_tgt);
5587 static int
5588 watchpoint_to_Z_packet (int type)
5590 switch (type)
5592 case hw_write:
5593 return Z_PACKET_WRITE_WP;
5594 break;
5595 case hw_read:
5596 return Z_PACKET_READ_WP;
5597 break;
5598 case hw_access:
5599 return Z_PACKET_ACCESS_WP;
5600 break;
5601 default:
5602 internal_error (__FILE__, __LINE__,
5603 _("hw_bp_to_z: bad watchpoint type %d"), type);
5607 static int
5608 remote_insert_watchpoint (CORE_ADDR addr, int len, int type)
5610 struct remote_state *rs = get_remote_state ();
5611 char *p;
5612 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
5614 if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE)
5615 return -1;
5617 sprintf (rs->buf, "Z%x,", packet);
5618 p = strchr (rs->buf, '\0');
5619 addr = remote_address_masked (addr);
5620 p += hexnumstr (p, (ULONGEST) addr);
5621 sprintf (p, ",%x", len);
5623 putpkt (rs->buf);
5624 getpkt (&rs->buf, &rs->buf_size, 0);
5626 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
5628 case PACKET_ERROR:
5629 case PACKET_UNKNOWN:
5630 return -1;
5631 case PACKET_OK:
5632 return 0;
5634 internal_error (__FILE__, __LINE__,
5635 _("remote_insert_watchpoint: reached end of function"));
5639 static int
5640 remote_remove_watchpoint (CORE_ADDR addr, int len, int type)
5642 struct remote_state *rs = get_remote_state ();
5643 char *p;
5644 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
5646 if (remote_protocol_packets[PACKET_Z0 + packet].support == PACKET_DISABLE)
5647 return -1;
5649 sprintf (rs->buf, "z%x,", packet);
5650 p = strchr (rs->buf, '\0');
5651 addr = remote_address_masked (addr);
5652 p += hexnumstr (p, (ULONGEST) addr);
5653 sprintf (p, ",%x", len);
5654 putpkt (rs->buf);
5655 getpkt (&rs->buf, &rs->buf_size, 0);
5657 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
5659 case PACKET_ERROR:
5660 case PACKET_UNKNOWN:
5661 return -1;
5662 case PACKET_OK:
5663 return 0;
5665 internal_error (__FILE__, __LINE__,
5666 _("remote_remove_watchpoint: reached end of function"));
5670 int remote_hw_watchpoint_limit = -1;
5671 int remote_hw_breakpoint_limit = -1;
5673 static int
5674 remote_check_watch_resources (int type, int cnt, int ot)
5676 if (type == bp_hardware_breakpoint)
5678 if (remote_hw_breakpoint_limit == 0)
5679 return 0;
5680 else if (remote_hw_breakpoint_limit < 0)
5681 return 1;
5682 else if (cnt <= remote_hw_breakpoint_limit)
5683 return 1;
5685 else
5687 if (remote_hw_watchpoint_limit == 0)
5688 return 0;
5689 else if (remote_hw_watchpoint_limit < 0)
5690 return 1;
5691 else if (ot)
5692 return -1;
5693 else if (cnt <= remote_hw_watchpoint_limit)
5694 return 1;
5696 return -1;
5699 static int
5700 remote_stopped_by_watchpoint (void)
5702 return remote_stopped_by_watchpoint_p;
5705 static int
5706 remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
5708 int rc = 0;
5709 if (remote_stopped_by_watchpoint ())
5711 *addr_p = remote_watch_data_address;
5712 rc = 1;
5715 return rc;
5719 static int
5720 remote_insert_hw_breakpoint (struct bp_target_info *bp_tgt)
5722 CORE_ADDR addr;
5723 struct remote_state *rs = get_remote_state ();
5724 char *p = rs->buf;
5726 /* The length field should be set to the size of a breakpoint
5727 instruction, even though we aren't inserting one ourselves. */
5729 gdbarch_breakpoint_from_pc
5730 (current_gdbarch, &bp_tgt->placed_address, &bp_tgt->placed_size);
5732 if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
5733 return -1;
5735 *(p++) = 'Z';
5736 *(p++) = '1';
5737 *(p++) = ',';
5739 addr = remote_address_masked (bp_tgt->placed_address);
5740 p += hexnumstr (p, (ULONGEST) addr);
5741 sprintf (p, ",%x", bp_tgt->placed_size);
5743 putpkt (rs->buf);
5744 getpkt (&rs->buf, &rs->buf_size, 0);
5746 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
5748 case PACKET_ERROR:
5749 case PACKET_UNKNOWN:
5750 return -1;
5751 case PACKET_OK:
5752 return 0;
5754 internal_error (__FILE__, __LINE__,
5755 _("remote_insert_hw_breakpoint: reached end of function"));
5759 static int
5760 remote_remove_hw_breakpoint (struct bp_target_info *bp_tgt)
5762 CORE_ADDR addr;
5763 struct remote_state *rs = get_remote_state ();
5764 char *p = rs->buf;
5766 if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
5767 return -1;
5769 *(p++) = 'z';
5770 *(p++) = '1';
5771 *(p++) = ',';
5773 addr = remote_address_masked (bp_tgt->placed_address);
5774 p += hexnumstr (p, (ULONGEST) addr);
5775 sprintf (p, ",%x", bp_tgt->placed_size);
5777 putpkt (rs->buf);
5778 getpkt (&rs->buf, &rs->buf_size, 0);
5780 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
5782 case PACKET_ERROR:
5783 case PACKET_UNKNOWN:
5784 return -1;
5785 case PACKET_OK:
5786 return 0;
5788 internal_error (__FILE__, __LINE__,
5789 _("remote_remove_hw_breakpoint: reached end of function"));
5792 /* Some targets are only capable of doing downloads, and afterwards
5793 they switch to the remote serial protocol. This function provides
5794 a clean way to get from the download target to the remote target.
5795 It's basically just a wrapper so that we don't have to expose any
5796 of the internal workings of remote.c.
5798 Prior to calling this routine, you should shutdown the current
5799 target code, else you will get the "A program is being debugged
5800 already..." message. Usually a call to pop_target() suffices. */
5802 void
5803 push_remote_target (char *name, int from_tty)
5805 printf_filtered (_("Switching to remote protocol\n"));
5806 remote_open (name, from_tty);
5809 /* Table used by the crc32 function to calcuate the checksum. */
5811 static unsigned long crc32_table[256] =
5812 {0, 0};
5814 static unsigned long
5815 crc32 (unsigned char *buf, int len, unsigned int crc)
5817 if (!crc32_table[1])
5819 /* Initialize the CRC table and the decoding table. */
5820 int i, j;
5821 unsigned int c;
5823 for (i = 0; i < 256; i++)
5825 for (c = i << 24, j = 8; j > 0; --j)
5826 c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
5827 crc32_table[i] = c;
5831 while (len--)
5833 crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255];
5834 buf++;
5836 return crc;
5839 /* compare-sections command
5841 With no arguments, compares each loadable section in the exec bfd
5842 with the same memory range on the target, and reports mismatches.
5843 Useful for verifying the image on the target against the exec file.
5844 Depends on the target understanding the new "qCRC:" request. */
5846 /* FIXME: cagney/1999-10-26: This command should be broken down into a
5847 target method (target verify memory) and generic version of the
5848 actual command. This will allow other high-level code (especially
5849 generic_load()) to make use of this target functionality. */
5851 static void
5852 compare_sections_command (char *args, int from_tty)
5854 struct remote_state *rs = get_remote_state ();
5855 asection *s;
5856 unsigned long host_crc, target_crc;
5857 extern bfd *exec_bfd;
5858 struct cleanup *old_chain;
5859 char *tmp;
5860 char *sectdata;
5861 const char *sectname;
5862 bfd_size_type size;
5863 bfd_vma lma;
5864 int matched = 0;
5865 int mismatched = 0;
5867 if (!exec_bfd)
5868 error (_("command cannot be used without an exec file"));
5869 if (!current_target.to_shortname ||
5870 strcmp (current_target.to_shortname, "remote") != 0)
5871 error (_("command can only be used with remote target"));
5873 for (s = exec_bfd->sections; s; s = s->next)
5875 if (!(s->flags & SEC_LOAD))
5876 continue; /* skip non-loadable section */
5878 size = bfd_get_section_size (s);
5879 if (size == 0)
5880 continue; /* skip zero-length section */
5882 sectname = bfd_get_section_name (exec_bfd, s);
5883 if (args && strcmp (args, sectname) != 0)
5884 continue; /* not the section selected by user */
5886 matched = 1; /* do this section */
5887 lma = s->lma;
5888 /* FIXME: assumes lma can fit into long. */
5889 xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx",
5890 (long) lma, (long) size);
5891 putpkt (rs->buf);
5893 /* Be clever; compute the host_crc before waiting for target
5894 reply. */
5895 sectdata = xmalloc (size);
5896 old_chain = make_cleanup (xfree, sectdata);
5897 bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
5898 host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff);
5900 getpkt (&rs->buf, &rs->buf_size, 0);
5901 if (rs->buf[0] == 'E')
5902 error (_("target memory fault, section %s, range 0x%s -- 0x%s"),
5903 sectname, paddr (lma), paddr (lma + size));
5904 if (rs->buf[0] != 'C')
5905 error (_("remote target does not support this operation"));
5907 for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++)
5908 target_crc = target_crc * 16 + fromhex (*tmp);
5910 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
5911 sectname, paddr (lma), paddr (lma + size));
5912 if (host_crc == target_crc)
5913 printf_filtered ("matched.\n");
5914 else
5916 printf_filtered ("MIS-MATCHED!\n");
5917 mismatched++;
5920 do_cleanups (old_chain);
5922 if (mismatched > 0)
5923 warning (_("One or more sections of the remote executable does not match\n\
5924 the loaded file\n"));
5925 if (args && !matched)
5926 printf_filtered (_("No loaded section named '%s'.\n"), args);
5929 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
5930 into remote target. The number of bytes written to the remote
5931 target is returned, or -1 for error. */
5933 static LONGEST
5934 remote_write_qxfer (struct target_ops *ops, const char *object_name,
5935 const char *annex, const gdb_byte *writebuf,
5936 ULONGEST offset, LONGEST len,
5937 struct packet_config *packet)
5939 int i, buf_len;
5940 ULONGEST n;
5941 gdb_byte *wbuf;
5942 struct remote_state *rs = get_remote_state ();
5943 int max_size = get_memory_write_packet_size ();
5945 if (packet->support == PACKET_DISABLE)
5946 return -1;
5948 /* Insert header. */
5949 i = snprintf (rs->buf, max_size,
5950 "qXfer:%s:write:%s:%s:",
5951 object_name, annex ? annex : "",
5952 phex_nz (offset, sizeof offset));
5953 max_size -= (i + 1);
5955 /* Escape as much data as fits into rs->buf. */
5956 buf_len = remote_escape_output
5957 (writebuf, len, (rs->buf + i), &max_size, max_size);
5959 if (putpkt_binary (rs->buf, i + buf_len) < 0
5960 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
5961 || packet_ok (rs->buf, packet) != PACKET_OK)
5962 return -1;
5964 unpack_varlen_hex (rs->buf, &n);
5965 return n;
5968 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
5969 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
5970 number of bytes read is returned, or 0 for EOF, or -1 for error.
5971 The number of bytes read may be less than LEN without indicating an
5972 EOF. PACKET is checked and updated to indicate whether the remote
5973 target supports this object. */
5975 static LONGEST
5976 remote_read_qxfer (struct target_ops *ops, const char *object_name,
5977 const char *annex,
5978 gdb_byte *readbuf, ULONGEST offset, LONGEST len,
5979 struct packet_config *packet)
5981 static char *finished_object;
5982 static char *finished_annex;
5983 static ULONGEST finished_offset;
5985 struct remote_state *rs = get_remote_state ();
5986 unsigned int total = 0;
5987 LONGEST i, n, packet_len;
5989 if (packet->support == PACKET_DISABLE)
5990 return -1;
5992 /* Check whether we've cached an end-of-object packet that matches
5993 this request. */
5994 if (finished_object)
5996 if (strcmp (object_name, finished_object) == 0
5997 && strcmp (annex ? annex : "", finished_annex) == 0
5998 && offset == finished_offset)
5999 return 0;
6001 /* Otherwise, we're now reading something different. Discard
6002 the cache. */
6003 xfree (finished_object);
6004 xfree (finished_annex);
6005 finished_object = NULL;
6006 finished_annex = NULL;
6009 /* Request only enough to fit in a single packet. The actual data
6010 may not, since we don't know how much of it will need to be escaped;
6011 the target is free to respond with slightly less data. We subtract
6012 five to account for the response type and the protocol frame. */
6013 n = min (get_remote_packet_size () - 5, len);
6014 snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
6015 object_name, annex ? annex : "",
6016 phex_nz (offset, sizeof offset),
6017 phex_nz (n, sizeof n));
6018 i = putpkt (rs->buf);
6019 if (i < 0)
6020 return -1;
6022 rs->buf[0] = '\0';
6023 packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0);
6024 if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK)
6025 return -1;
6027 if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
6028 error (_("Unknown remote qXfer reply: %s"), rs->buf);
6030 /* 'm' means there is (or at least might be) more data after this
6031 batch. That does not make sense unless there's at least one byte
6032 of data in this reply. */
6033 if (rs->buf[0] == 'm' && packet_len == 1)
6034 error (_("Remote qXfer reply contained no data."));
6036 /* Got some data. */
6037 i = remote_unescape_input (rs->buf + 1, packet_len - 1, readbuf, n);
6039 /* 'l' is an EOF marker, possibly including a final block of data,
6040 or possibly empty. If we have the final block of a non-empty
6041 object, record this fact to bypass a subsequent partial read. */
6042 if (rs->buf[0] == 'l' && offset + i > 0)
6044 finished_object = xstrdup (object_name);
6045 finished_annex = xstrdup (annex ? annex : "");
6046 finished_offset = offset + i;
6049 return i;
6052 static LONGEST
6053 remote_xfer_partial (struct target_ops *ops, enum target_object object,
6054 const char *annex, gdb_byte *readbuf,
6055 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
6057 struct remote_state *rs = get_remote_state ();
6058 int i;
6059 char *p2;
6060 char query_type;
6062 /* Handle memory using the standard memory routines. */
6063 if (object == TARGET_OBJECT_MEMORY)
6065 int xfered;
6066 errno = 0;
6068 /* If the remote target is connected but not running, we should
6069 pass this request down to a lower stratum (e.g. the executable
6070 file). */
6071 if (!target_has_execution)
6072 return 0;
6074 if (writebuf != NULL)
6075 xfered = remote_write_bytes (offset, writebuf, len);
6076 else
6077 xfered = remote_read_bytes (offset, readbuf, len);
6079 if (xfered > 0)
6080 return xfered;
6081 else if (xfered == 0 && errno == 0)
6082 return 0;
6083 else
6084 return -1;
6087 /* Handle SPU memory using qxfer packets. */
6088 if (object == TARGET_OBJECT_SPU)
6090 if (readbuf)
6091 return remote_read_qxfer (ops, "spu", annex, readbuf, offset, len,
6092 &remote_protocol_packets
6093 [PACKET_qXfer_spu_read]);
6094 else
6095 return remote_write_qxfer (ops, "spu", annex, writebuf, offset, len,
6096 &remote_protocol_packets
6097 [PACKET_qXfer_spu_write]);
6100 /* Only handle flash writes. */
6101 if (writebuf != NULL)
6103 LONGEST xfered;
6105 switch (object)
6107 case TARGET_OBJECT_FLASH:
6108 xfered = remote_flash_write (ops, offset, len, writebuf);
6110 if (xfered > 0)
6111 return xfered;
6112 else if (xfered == 0 && errno == 0)
6113 return 0;
6114 else
6115 return -1;
6117 default:
6118 return -1;
6122 /* Map pre-existing objects onto letters. DO NOT do this for new
6123 objects!!! Instead specify new query packets. */
6124 switch (object)
6126 case TARGET_OBJECT_AVR:
6127 query_type = 'R';
6128 break;
6130 case TARGET_OBJECT_AUXV:
6131 gdb_assert (annex == NULL);
6132 return remote_read_qxfer (ops, "auxv", annex, readbuf, offset, len,
6133 &remote_protocol_packets[PACKET_qXfer_auxv]);
6135 case TARGET_OBJECT_AVAILABLE_FEATURES:
6136 return remote_read_qxfer
6137 (ops, "features", annex, readbuf, offset, len,
6138 &remote_protocol_packets[PACKET_qXfer_features]);
6140 case TARGET_OBJECT_LIBRARIES:
6141 return remote_read_qxfer
6142 (ops, "libraries", annex, readbuf, offset, len,
6143 &remote_protocol_packets[PACKET_qXfer_libraries]);
6145 case TARGET_OBJECT_MEMORY_MAP:
6146 gdb_assert (annex == NULL);
6147 return remote_read_qxfer (ops, "memory-map", annex, readbuf, offset, len,
6148 &remote_protocol_packets[PACKET_qXfer_memory_map]);
6150 default:
6151 return -1;
6154 /* Note: a zero OFFSET and LEN can be used to query the minimum
6155 buffer size. */
6156 if (offset == 0 && len == 0)
6157 return (get_remote_packet_size ());
6158 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
6159 large enough let the caller deal with it. */
6160 if (len < get_remote_packet_size ())
6161 return -1;
6162 len = get_remote_packet_size ();
6164 /* Except for querying the minimum buffer size, target must be open. */
6165 if (!remote_desc)
6166 error (_("remote query is only available after target open"));
6168 gdb_assert (annex != NULL);
6169 gdb_assert (readbuf != NULL);
6171 p2 = rs->buf;
6172 *p2++ = 'q';
6173 *p2++ = query_type;
6175 /* We used one buffer char for the remote protocol q command and
6176 another for the query type. As the remote protocol encapsulation
6177 uses 4 chars plus one extra in case we are debugging
6178 (remote_debug), we have PBUFZIZ - 7 left to pack the query
6179 string. */
6180 i = 0;
6181 while (annex[i] && (i < (get_remote_packet_size () - 8)))
6183 /* Bad caller may have sent forbidden characters. */
6184 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
6185 *p2++ = annex[i];
6186 i++;
6188 *p2 = '\0';
6189 gdb_assert (annex[i] == '\0');
6191 i = putpkt (rs->buf);
6192 if (i < 0)
6193 return i;
6195 getpkt (&rs->buf, &rs->buf_size, 0);
6196 strcpy ((char *) readbuf, rs->buf);
6198 return strlen ((char *) readbuf);
6201 static void
6202 remote_rcmd (char *command,
6203 struct ui_file *outbuf)
6205 struct remote_state *rs = get_remote_state ();
6206 char *p = rs->buf;
6208 if (!remote_desc)
6209 error (_("remote rcmd is only available after target open"));
6211 /* Send a NULL command across as an empty command. */
6212 if (command == NULL)
6213 command = "";
6215 /* The query prefix. */
6216 strcpy (rs->buf, "qRcmd,");
6217 p = strchr (rs->buf, '\0');
6219 if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/) > get_remote_packet_size ())
6220 error (_("\"monitor\" command ``%s'' is too long."), command);
6222 /* Encode the actual command. */
6223 bin2hex ((gdb_byte *) command, p, 0);
6225 if (putpkt (rs->buf) < 0)
6226 error (_("Communication problem with target."));
6228 /* get/display the response */
6229 while (1)
6231 char *buf;
6233 /* XXX - see also tracepoint.c:remote_get_noisy_reply(). */
6234 rs->buf[0] = '\0';
6235 getpkt (&rs->buf, &rs->buf_size, 0);
6236 buf = rs->buf;
6237 if (buf[0] == '\0')
6238 error (_("Target does not support this command."));
6239 if (buf[0] == 'O' && buf[1] != 'K')
6241 remote_console_output (buf + 1); /* 'O' message from stub. */
6242 continue;
6244 if (strcmp (buf, "OK") == 0)
6245 break;
6246 if (strlen (buf) == 3 && buf[0] == 'E'
6247 && isdigit (buf[1]) && isdigit (buf[2]))
6249 error (_("Protocol error with Rcmd"));
6251 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
6253 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
6254 fputc_unfiltered (c, outbuf);
6256 break;
6260 static VEC(mem_region_s) *
6261 remote_memory_map (struct target_ops *ops)
6263 VEC(mem_region_s) *result = NULL;
6264 char *text = target_read_stralloc (&current_target,
6265 TARGET_OBJECT_MEMORY_MAP, NULL);
6267 if (text)
6269 struct cleanup *back_to = make_cleanup (xfree, text);
6270 result = parse_memory_map (text);
6271 do_cleanups (back_to);
6274 return result;
6277 static void
6278 packet_command (char *args, int from_tty)
6280 struct remote_state *rs = get_remote_state ();
6282 if (!remote_desc)
6283 error (_("command can only be used with remote target"));
6285 if (!args)
6286 error (_("remote-packet command requires packet text as argument"));
6288 puts_filtered ("sending: ");
6289 print_packet (args);
6290 puts_filtered ("\n");
6291 putpkt (args);
6293 getpkt (&rs->buf, &rs->buf_size, 0);
6294 puts_filtered ("received: ");
6295 print_packet (rs->buf);
6296 puts_filtered ("\n");
6299 #if 0
6300 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
6302 static void display_thread_info (struct gdb_ext_thread_info *info);
6304 static void threadset_test_cmd (char *cmd, int tty);
6306 static void threadalive_test (char *cmd, int tty);
6308 static void threadlist_test_cmd (char *cmd, int tty);
6310 int get_and_display_threadinfo (threadref *ref);
6312 static void threadinfo_test_cmd (char *cmd, int tty);
6314 static int thread_display_step (threadref *ref, void *context);
6316 static void threadlist_update_test_cmd (char *cmd, int tty);
6318 static void init_remote_threadtests (void);
6320 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
6322 static void
6323 threadset_test_cmd (char *cmd, int tty)
6325 int sample_thread = SAMPLE_THREAD;
6327 printf_filtered (_("Remote threadset test\n"));
6328 set_thread (sample_thread, 1);
6332 static void
6333 threadalive_test (char *cmd, int tty)
6335 int sample_thread = SAMPLE_THREAD;
6337 if (remote_thread_alive (pid_to_ptid (sample_thread)))
6338 printf_filtered ("PASS: Thread alive test\n");
6339 else
6340 printf_filtered ("FAIL: Thread alive test\n");
6343 void output_threadid (char *title, threadref *ref);
6345 void
6346 output_threadid (char *title, threadref *ref)
6348 char hexid[20];
6350 pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
6351 hexid[16] = 0;
6352 printf_filtered ("%s %s\n", title, (&hexid[0]));
6355 static void
6356 threadlist_test_cmd (char *cmd, int tty)
6358 int startflag = 1;
6359 threadref nextthread;
6360 int done, result_count;
6361 threadref threadlist[3];
6363 printf_filtered ("Remote Threadlist test\n");
6364 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
6365 &result_count, &threadlist[0]))
6366 printf_filtered ("FAIL: threadlist test\n");
6367 else
6369 threadref *scan = threadlist;
6370 threadref *limit = scan + result_count;
6372 while (scan < limit)
6373 output_threadid (" thread ", scan++);
6377 void
6378 display_thread_info (struct gdb_ext_thread_info *info)
6380 output_threadid ("Threadid: ", &info->threadid);
6381 printf_filtered ("Name: %s\n ", info->shortname);
6382 printf_filtered ("State: %s\n", info->display);
6383 printf_filtered ("other: %s\n\n", info->more_display);
6387 get_and_display_threadinfo (threadref *ref)
6389 int result;
6390 int set;
6391 struct gdb_ext_thread_info threadinfo;
6393 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
6394 | TAG_MOREDISPLAY | TAG_DISPLAY;
6395 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
6396 display_thread_info (&threadinfo);
6397 return result;
6400 static void
6401 threadinfo_test_cmd (char *cmd, int tty)
6403 int athread = SAMPLE_THREAD;
6404 threadref thread;
6405 int set;
6407 int_to_threadref (&thread, athread);
6408 printf_filtered ("Remote Threadinfo test\n");
6409 if (!get_and_display_threadinfo (&thread))
6410 printf_filtered ("FAIL cannot get thread info\n");
6413 static int
6414 thread_display_step (threadref *ref, void *context)
6416 /* output_threadid(" threadstep ",ref); *//* simple test */
6417 return get_and_display_threadinfo (ref);
6420 static void
6421 threadlist_update_test_cmd (char *cmd, int tty)
6423 printf_filtered ("Remote Threadlist update test\n");
6424 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
6427 static void
6428 init_remote_threadtests (void)
6430 add_com ("tlist", class_obscure, threadlist_test_cmd, _("\
6431 Fetch and print the remote list of thread identifiers, one pkt only"));
6432 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
6433 _("Fetch and display info about one thread"));
6434 add_com ("tset", class_obscure, threadset_test_cmd,
6435 _("Test setting to a different thread"));
6436 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
6437 _("Iterate through updating all remote thread info"));
6438 add_com ("talive", class_obscure, threadalive_test,
6439 _(" Remote thread alive test "));
6442 #endif /* 0 */
6444 /* Convert a thread ID to a string. Returns the string in a static
6445 buffer. */
6447 static char *
6448 remote_pid_to_str (ptid_t ptid)
6450 static char buf[32];
6452 xsnprintf (buf, sizeof buf, "Thread %d", ptid_get_pid (ptid));
6453 return buf;
6456 /* Get the address of the thread local variable in OBJFILE which is
6457 stored at OFFSET within the thread local storage for thread PTID. */
6459 static CORE_ADDR
6460 remote_get_thread_local_address (ptid_t ptid, CORE_ADDR lm, CORE_ADDR offset)
6462 if (remote_protocol_packets[PACKET_qGetTLSAddr].support != PACKET_DISABLE)
6464 struct remote_state *rs = get_remote_state ();
6465 char *p = rs->buf;
6466 enum packet_result result;
6468 strcpy (p, "qGetTLSAddr:");
6469 p += strlen (p);
6470 p += hexnumstr (p, PIDGET (ptid));
6471 *p++ = ',';
6472 p += hexnumstr (p, offset);
6473 *p++ = ',';
6474 p += hexnumstr (p, lm);
6475 *p++ = '\0';
6477 putpkt (rs->buf);
6478 getpkt (&rs->buf, &rs->buf_size, 0);
6479 result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_qGetTLSAddr]);
6480 if (result == PACKET_OK)
6482 ULONGEST result;
6484 unpack_varlen_hex (rs->buf, &result);
6485 return result;
6487 else if (result == PACKET_UNKNOWN)
6488 throw_error (TLS_GENERIC_ERROR,
6489 _("Remote target doesn't support qGetTLSAddr packet"));
6490 else
6491 throw_error (TLS_GENERIC_ERROR,
6492 _("Remote target failed to process qGetTLSAddr request"));
6494 else
6495 throw_error (TLS_GENERIC_ERROR,
6496 _("TLS not supported or disabled on this target"));
6497 /* Not reached. */
6498 return 0;
6501 /* Support for inferring a target description based on the current
6502 architecture and the size of a 'g' packet. While the 'g' packet
6503 can have any size (since optional registers can be left off the
6504 end), some sizes are easily recognizable given knowledge of the
6505 approximate architecture. */
6507 struct remote_g_packet_guess
6509 int bytes;
6510 const struct target_desc *tdesc;
6512 typedef struct remote_g_packet_guess remote_g_packet_guess_s;
6513 DEF_VEC_O(remote_g_packet_guess_s);
6515 struct remote_g_packet_data
6517 VEC(remote_g_packet_guess_s) *guesses;
6520 static struct gdbarch_data *remote_g_packet_data_handle;
6522 static void *
6523 remote_g_packet_data_init (struct obstack *obstack)
6525 return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data);
6528 void
6529 register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
6530 const struct target_desc *tdesc)
6532 struct remote_g_packet_data *data
6533 = gdbarch_data (gdbarch, remote_g_packet_data_handle);
6534 struct remote_g_packet_guess new_guess, *guess;
6535 int ix;
6537 gdb_assert (tdesc != NULL);
6539 for (ix = 0;
6540 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
6541 ix++)
6542 if (guess->bytes == bytes)
6543 internal_error (__FILE__, __LINE__,
6544 "Duplicate g packet description added for size %d",
6545 bytes);
6547 new_guess.bytes = bytes;
6548 new_guess.tdesc = tdesc;
6549 VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess);
6552 static const struct target_desc *
6553 remote_read_description (struct target_ops *target)
6555 struct remote_g_packet_data *data
6556 = gdbarch_data (current_gdbarch, remote_g_packet_data_handle);
6558 if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
6560 struct remote_g_packet_guess *guess;
6561 int ix;
6562 int bytes = send_g_packet ();
6564 for (ix = 0;
6565 VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
6566 ix++)
6567 if (guess->bytes == bytes)
6568 return guess->tdesc;
6570 /* We discard the g packet. A minor optimization would be to
6571 hold on to it, and fill the register cache once we have selected
6572 an architecture, but it's too tricky to do safely. */
6575 return NULL;
6578 /* Remote file transfer support. This is host-initiated I/O, not
6579 target-initiated; for target-initiated, see remote-fileio.c. */
6581 /* If *LEFT is at least the length of STRING, copy STRING to
6582 *BUFFER, update *BUFFER to point to the new end of the buffer, and
6583 decrease *LEFT. Otherwise raise an error. */
6585 static void
6586 remote_buffer_add_string (char **buffer, int *left, char *string)
6588 int len = strlen (string);
6590 if (len > *left)
6591 error (_("Packet too long for target."));
6593 memcpy (*buffer, string, len);
6594 *buffer += len;
6595 *left -= len;
6597 /* NUL-terminate the buffer as a convenience, if there is
6598 room. */
6599 if (*left)
6600 **buffer = '\0';
6603 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
6604 *BUFFER, update *BUFFER to point to the new end of the buffer, and
6605 decrease *LEFT. Otherwise raise an error. */
6607 static void
6608 remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
6609 int len)
6611 if (2 * len > *left)
6612 error (_("Packet too long for target."));
6614 bin2hex (bytes, *buffer, len);
6615 *buffer += 2 * len;
6616 *left -= 2 * len;
6618 /* NUL-terminate the buffer as a convenience, if there is
6619 room. */
6620 if (*left)
6621 **buffer = '\0';
6624 /* If *LEFT is large enough, convert VALUE to hex and add it to
6625 *BUFFER, update *BUFFER to point to the new end of the buffer, and
6626 decrease *LEFT. Otherwise raise an error. */
6628 static void
6629 remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
6631 int len = hexnumlen (value);
6633 if (len > *left)
6634 error (_("Packet too long for target."));
6636 hexnumstr (*buffer, value);
6637 *buffer += len;
6638 *left -= len;
6640 /* NUL-terminate the buffer as a convenience, if there is
6641 room. */
6642 if (*left)
6643 **buffer = '\0';
6646 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
6647 value, *REMOTE_ERRNO to the remote error number or zero if none
6648 was included, and *ATTACHMENT to point to the start of the annex
6649 if any. The length of the packet isn't needed here; there may
6650 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
6652 Return 0 if the packet could be parsed, -1 if it could not. If
6653 -1 is returned, the other variables may not be initialized. */
6655 static int
6656 remote_hostio_parse_result (char *buffer, int *retcode,
6657 int *remote_errno, char **attachment)
6659 char *p, *p2;
6661 *remote_errno = 0;
6662 *attachment = NULL;
6664 if (buffer[0] != 'F')
6665 return -1;
6667 errno = 0;
6668 *retcode = strtol (&buffer[1], &p, 16);
6669 if (errno != 0 || p == &buffer[1])
6670 return -1;
6672 /* Check for ",errno". */
6673 if (*p == ',')
6675 errno = 0;
6676 *remote_errno = strtol (p + 1, &p2, 16);
6677 if (errno != 0 || p + 1 == p2)
6678 return -1;
6679 p = p2;
6682 /* Check for ";attachment". If there is no attachment, the
6683 packet should end here. */
6684 if (*p == ';')
6686 *attachment = p + 1;
6687 return 0;
6689 else if (*p == '\0')
6690 return 0;
6691 else
6692 return -1;
6695 /* Send a prepared I/O packet to the target and read its response.
6696 The prepared packet is in the global RS->BUF before this function
6697 is called, and the answer is there when we return.
6699 COMMAND_BYTES is the length of the request to send, which may include
6700 binary data. WHICH_PACKET is the packet configuration to check
6701 before attempting a packet. If an error occurs, *REMOTE_ERRNO
6702 is set to the error number and -1 is returned. Otherwise the value
6703 returned by the function is returned.
6705 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
6706 attachment is expected; an error will be reported if there's a
6707 mismatch. If one is found, *ATTACHMENT will be set to point into
6708 the packet buffer and *ATTACHMENT_LEN will be set to the
6709 attachment's length. */
6711 static int
6712 remote_hostio_send_command (int command_bytes, int which_packet,
6713 int *remote_errno, char **attachment,
6714 int *attachment_len)
6716 struct remote_state *rs = get_remote_state ();
6717 int ret, bytes_read;
6718 char *attachment_tmp;
6720 if (remote_protocol_packets[which_packet].support == PACKET_DISABLE)
6722 *remote_errno = FILEIO_ENOSYS;
6723 return -1;
6726 putpkt_binary (rs->buf, command_bytes);
6727 bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0);
6729 /* If it timed out, something is wrong. Don't try to parse the
6730 buffer. */
6731 if (bytes_read < 0)
6733 *remote_errno = FILEIO_EINVAL;
6734 return -1;
6737 switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
6739 case PACKET_ERROR:
6740 *remote_errno = FILEIO_EINVAL;
6741 return -1;
6742 case PACKET_UNKNOWN:
6743 *remote_errno = FILEIO_ENOSYS;
6744 return -1;
6745 case PACKET_OK:
6746 break;
6749 if (remote_hostio_parse_result (rs->buf, &ret, remote_errno,
6750 &attachment_tmp))
6752 *remote_errno = FILEIO_EINVAL;
6753 return -1;
6756 /* Make sure we saw an attachment if and only if we expected one. */
6757 if ((attachment_tmp == NULL && attachment != NULL)
6758 || (attachment_tmp != NULL && attachment == NULL))
6760 *remote_errno = FILEIO_EINVAL;
6761 return -1;
6764 /* If an attachment was found, it must point into the packet buffer;
6765 work out how many bytes there were. */
6766 if (attachment_tmp != NULL)
6768 *attachment = attachment_tmp;
6769 *attachment_len = bytes_read - (*attachment - rs->buf);
6772 return ret;
6775 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
6776 remote file descriptor, or -1 if an error occurs (and set
6777 *REMOTE_ERRNO). */
6779 static int
6780 remote_hostio_open (const char *filename, int flags, int mode,
6781 int *remote_errno)
6783 struct remote_state *rs = get_remote_state ();
6784 char *p = rs->buf;
6785 int left = get_remote_packet_size () - 1;
6787 remote_buffer_add_string (&p, &left, "vFile:open:");
6789 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
6790 strlen (filename));
6791 remote_buffer_add_string (&p, &left, ",");
6793 remote_buffer_add_int (&p, &left, flags);
6794 remote_buffer_add_string (&p, &left, ",");
6796 remote_buffer_add_int (&p, &left, mode);
6798 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open,
6799 remote_errno, NULL, NULL);
6802 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
6803 Return the number of bytes written, or -1 if an error occurs (and
6804 set *REMOTE_ERRNO). */
6806 static int
6807 remote_hostio_pwrite (int fd, const gdb_byte *write_buf, int len,
6808 ULONGEST offset, int *remote_errno)
6810 struct remote_state *rs = get_remote_state ();
6811 char *p = rs->buf;
6812 int left = get_remote_packet_size ();
6813 int out_len;
6815 remote_buffer_add_string (&p, &left, "vFile:pwrite:");
6817 remote_buffer_add_int (&p, &left, fd);
6818 remote_buffer_add_string (&p, &left, ",");
6820 remote_buffer_add_int (&p, &left, offset);
6821 remote_buffer_add_string (&p, &left, ",");
6823 p += remote_escape_output (write_buf, len, p, &out_len,
6824 get_remote_packet_size () - (p - rs->buf));
6826 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite,
6827 remote_errno, NULL, NULL);
6830 /* Read up to LEN bytes FD on the remote target into READ_BUF
6831 Return the number of bytes read, or -1 if an error occurs (and
6832 set *REMOTE_ERRNO). */
6834 static int
6835 remote_hostio_pread (int fd, gdb_byte *read_buf, int len,
6836 ULONGEST offset, int *remote_errno)
6838 struct remote_state *rs = get_remote_state ();
6839 char *p = rs->buf;
6840 char *attachment;
6841 int left = get_remote_packet_size ();
6842 int ret, attachment_len;
6843 int read_len;
6845 remote_buffer_add_string (&p, &left, "vFile:pread:");
6847 remote_buffer_add_int (&p, &left, fd);
6848 remote_buffer_add_string (&p, &left, ",");
6850 remote_buffer_add_int (&p, &left, len);
6851 remote_buffer_add_string (&p, &left, ",");
6853 remote_buffer_add_int (&p, &left, offset);
6855 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread,
6856 remote_errno, &attachment,
6857 &attachment_len);
6859 if (ret < 0)
6860 return ret;
6862 read_len = remote_unescape_input (attachment, attachment_len,
6863 read_buf, len);
6864 if (read_len != ret)
6865 error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
6867 return ret;
6870 /* Close FD on the remote target. Return 0, or -1 if an error occurs
6871 (and set *REMOTE_ERRNO). */
6873 static int
6874 remote_hostio_close (int fd, int *remote_errno)
6876 struct remote_state *rs = get_remote_state ();
6877 char *p = rs->buf;
6878 int left = get_remote_packet_size () - 1;
6880 remote_buffer_add_string (&p, &left, "vFile:close:");
6882 remote_buffer_add_int (&p, &left, fd);
6884 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close,
6885 remote_errno, NULL, NULL);
6888 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
6889 occurs (and set *REMOTE_ERRNO). */
6891 static int
6892 remote_hostio_unlink (const char *filename, int *remote_errno)
6894 struct remote_state *rs = get_remote_state ();
6895 char *p = rs->buf;
6896 int left = get_remote_packet_size () - 1;
6898 remote_buffer_add_string (&p, &left, "vFile:unlink:");
6900 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
6901 strlen (filename));
6903 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink,
6904 remote_errno, NULL, NULL);
6907 static int
6908 remote_fileio_errno_to_host (int errnum)
6910 switch (errnum)
6912 case FILEIO_EPERM:
6913 return EPERM;
6914 case FILEIO_ENOENT:
6915 return ENOENT;
6916 case FILEIO_EINTR:
6917 return EINTR;
6918 case FILEIO_EIO:
6919 return EIO;
6920 case FILEIO_EBADF:
6921 return EBADF;
6922 case FILEIO_EACCES:
6923 return EACCES;
6924 case FILEIO_EFAULT:
6925 return EFAULT;
6926 case FILEIO_EBUSY:
6927 return EBUSY;
6928 case FILEIO_EEXIST:
6929 return EEXIST;
6930 case FILEIO_ENODEV:
6931 return ENODEV;
6932 case FILEIO_ENOTDIR:
6933 return ENOTDIR;
6934 case FILEIO_EISDIR:
6935 return EISDIR;
6936 case FILEIO_EINVAL:
6937 return EINVAL;
6938 case FILEIO_ENFILE:
6939 return ENFILE;
6940 case FILEIO_EMFILE:
6941 return EMFILE;
6942 case FILEIO_EFBIG:
6943 return EFBIG;
6944 case FILEIO_ENOSPC:
6945 return ENOSPC;
6946 case FILEIO_ESPIPE:
6947 return ESPIPE;
6948 case FILEIO_EROFS:
6949 return EROFS;
6950 case FILEIO_ENOSYS:
6951 return ENOSYS;
6952 case FILEIO_ENAMETOOLONG:
6953 return ENAMETOOLONG;
6955 return -1;
6958 static char *
6959 remote_hostio_error (int errnum)
6961 int host_error = remote_fileio_errno_to_host (errnum);
6963 if (host_error == -1)
6964 error (_("Unknown remote I/O error %d"), errnum);
6965 else
6966 error (_("Remote I/O error: %s"), safe_strerror (host_error));
6969 static void
6970 fclose_cleanup (void *file)
6972 fclose (file);
6975 static void
6976 remote_hostio_close_cleanup (void *opaque)
6978 int fd = *(int *) opaque;
6979 int remote_errno;
6981 remote_hostio_close (fd, &remote_errno);
6984 void
6985 remote_file_put (const char *local_file, const char *remote_file, int from_tty)
6987 struct cleanup *back_to, *close_cleanup;
6988 int retcode, fd, remote_errno, bytes, io_size;
6989 FILE *file;
6990 gdb_byte *buffer;
6991 int bytes_in_buffer;
6992 int saw_eof;
6993 ULONGEST offset;
6995 if (!remote_desc)
6996 error (_("command can only be used with remote target"));
6998 file = fopen (local_file, "rb");
6999 if (file == NULL)
7000 perror_with_name (local_file);
7001 back_to = make_cleanup (fclose_cleanup, file);
7003 fd = remote_hostio_open (remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
7004 | FILEIO_O_TRUNC),
7005 0700, &remote_errno);
7006 if (fd == -1)
7007 remote_hostio_error (remote_errno);
7009 /* Send up to this many bytes at once. They won't all fit in the
7010 remote packet limit, so we'll transfer slightly fewer. */
7011 io_size = get_remote_packet_size ();
7012 buffer = xmalloc (io_size);
7013 make_cleanup (xfree, buffer);
7015 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
7017 bytes_in_buffer = 0;
7018 saw_eof = 0;
7019 offset = 0;
7020 while (bytes_in_buffer || !saw_eof)
7022 if (!saw_eof)
7024 bytes = fread (buffer + bytes_in_buffer, 1, io_size - bytes_in_buffer,
7025 file);
7026 if (bytes == 0)
7028 if (ferror (file))
7029 error (_("Error reading %s."), local_file);
7030 else
7032 /* EOF. Unless there is something still in the
7033 buffer from the last iteration, we are done. */
7034 saw_eof = 1;
7035 if (bytes_in_buffer == 0)
7036 break;
7040 else
7041 bytes = 0;
7043 bytes += bytes_in_buffer;
7044 bytes_in_buffer = 0;
7046 retcode = remote_hostio_pwrite (fd, buffer, bytes, offset, &remote_errno);
7048 if (retcode < 0)
7049 remote_hostio_error (remote_errno);
7050 else if (retcode == 0)
7051 error (_("Remote write of %d bytes returned 0!"), bytes);
7052 else if (retcode < bytes)
7054 /* Short write. Save the rest of the read data for the next
7055 write. */
7056 bytes_in_buffer = bytes - retcode;
7057 memmove (buffer, buffer + retcode, bytes_in_buffer);
7060 offset += retcode;
7063 discard_cleanups (close_cleanup);
7064 if (remote_hostio_close (fd, &remote_errno))
7065 remote_hostio_error (remote_errno);
7067 if (from_tty)
7068 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
7069 do_cleanups (back_to);
7072 void
7073 remote_file_get (const char *remote_file, const char *local_file, int from_tty)
7075 struct cleanup *back_to, *close_cleanup;
7076 int retcode, fd, remote_errno, bytes, io_size;
7077 FILE *file;
7078 gdb_byte *buffer;
7079 ULONGEST offset;
7081 if (!remote_desc)
7082 error (_("command can only be used with remote target"));
7084 fd = remote_hostio_open (remote_file, FILEIO_O_RDONLY, 0, &remote_errno);
7085 if (fd == -1)
7086 remote_hostio_error (remote_errno);
7088 file = fopen (local_file, "wb");
7089 if (file == NULL)
7090 perror_with_name (local_file);
7091 back_to = make_cleanup (fclose_cleanup, file);
7093 /* Send up to this many bytes at once. They won't all fit in the
7094 remote packet limit, so we'll transfer slightly fewer. */
7095 io_size = get_remote_packet_size ();
7096 buffer = xmalloc (io_size);
7097 make_cleanup (xfree, buffer);
7099 close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
7101 offset = 0;
7102 while (1)
7104 bytes = remote_hostio_pread (fd, buffer, io_size, offset, &remote_errno);
7105 if (bytes == 0)
7106 /* Success, but no bytes, means end-of-file. */
7107 break;
7108 if (bytes == -1)
7109 remote_hostio_error (remote_errno);
7111 offset += bytes;
7113 bytes = fwrite (buffer, 1, bytes, file);
7114 if (bytes == 0)
7115 perror_with_name (local_file);
7118 discard_cleanups (close_cleanup);
7119 if (remote_hostio_close (fd, &remote_errno))
7120 remote_hostio_error (remote_errno);
7122 if (from_tty)
7123 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
7124 do_cleanups (back_to);
7127 void
7128 remote_file_delete (const char *remote_file, int from_tty)
7130 int retcode, remote_errno;
7132 if (!remote_desc)
7133 error (_("command can only be used with remote target"));
7135 retcode = remote_hostio_unlink (remote_file, &remote_errno);
7136 if (retcode == -1)
7137 remote_hostio_error (remote_errno);
7139 if (from_tty)
7140 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
7143 static void
7144 remote_put_command (char *args, int from_tty)
7146 struct cleanup *back_to;
7147 char **argv;
7149 argv = buildargv (args);
7150 if (argv == NULL)
7151 nomem (0);
7152 back_to = make_cleanup_freeargv (argv);
7153 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
7154 error (_("Invalid parameters to remote put"));
7156 remote_file_put (argv[0], argv[1], from_tty);
7158 do_cleanups (back_to);
7161 static void
7162 remote_get_command (char *args, int from_tty)
7164 struct cleanup *back_to;
7165 char **argv;
7167 argv = buildargv (args);
7168 if (argv == NULL)
7169 nomem (0);
7170 back_to = make_cleanup_freeargv (argv);
7171 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
7172 error (_("Invalid parameters to remote get"));
7174 remote_file_get (argv[0], argv[1], from_tty);
7176 do_cleanups (back_to);
7179 static void
7180 remote_delete_command (char *args, int from_tty)
7182 struct cleanup *back_to;
7183 char **argv;
7185 argv = buildargv (args);
7186 if (argv == NULL)
7187 nomem (0);
7188 back_to = make_cleanup_freeargv (argv);
7189 if (argv[0] == NULL || argv[1] != NULL)
7190 error (_("Invalid parameters to remote delete"));
7192 remote_file_delete (argv[0], from_tty);
7194 do_cleanups (back_to);
7197 static void
7198 remote_command (char *args, int from_tty)
7200 help_list (remote_cmdlist, "remote ", -1, gdb_stdout);
7203 static void
7204 init_remote_ops (void)
7206 remote_ops.to_shortname = "remote";
7207 remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
7208 remote_ops.to_doc =
7209 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
7210 Specify the serial device it is connected to\n\
7211 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
7212 remote_ops.to_open = remote_open;
7213 remote_ops.to_close = remote_close;
7214 remote_ops.to_detach = remote_detach;
7215 remote_ops.to_disconnect = remote_disconnect;
7216 remote_ops.to_resume = remote_resume;
7217 remote_ops.to_wait = remote_wait;
7218 remote_ops.to_fetch_registers = remote_fetch_registers;
7219 remote_ops.to_store_registers = remote_store_registers;
7220 remote_ops.to_prepare_to_store = remote_prepare_to_store;
7221 remote_ops.deprecated_xfer_memory = remote_xfer_memory;
7222 remote_ops.to_files_info = remote_files_info;
7223 remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
7224 remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
7225 remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
7226 remote_ops.to_stopped_data_address = remote_stopped_data_address;
7227 remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
7228 remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
7229 remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
7230 remote_ops.to_insert_watchpoint = remote_insert_watchpoint;
7231 remote_ops.to_remove_watchpoint = remote_remove_watchpoint;
7232 remote_ops.to_kill = remote_kill;
7233 remote_ops.to_load = generic_load;
7234 remote_ops.to_mourn_inferior = remote_mourn;
7235 remote_ops.to_thread_alive = remote_thread_alive;
7236 remote_ops.to_find_new_threads = remote_threads_info;
7237 remote_ops.to_pid_to_str = remote_pid_to_str;
7238 remote_ops.to_extra_thread_info = remote_threads_extra_info;
7239 remote_ops.to_stop = remote_stop;
7240 remote_ops.to_xfer_partial = remote_xfer_partial;
7241 remote_ops.to_rcmd = remote_rcmd;
7242 remote_ops.to_log_command = serial_log_command;
7243 remote_ops.to_get_thread_local_address = remote_get_thread_local_address;
7244 remote_ops.to_stratum = process_stratum;
7245 remote_ops.to_has_all_memory = 1;
7246 remote_ops.to_has_memory = 1;
7247 remote_ops.to_has_stack = 1;
7248 remote_ops.to_has_registers = 1;
7249 remote_ops.to_has_execution = 1;
7250 remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
7251 remote_ops.to_magic = OPS_MAGIC;
7252 remote_ops.to_memory_map = remote_memory_map;
7253 remote_ops.to_flash_erase = remote_flash_erase;
7254 remote_ops.to_flash_done = remote_flash_done;
7255 remote_ops.to_read_description = remote_read_description;
7258 /* Set up the extended remote vector by making a copy of the standard
7259 remote vector and adding to it. */
7261 static void
7262 init_extended_remote_ops (void)
7264 extended_remote_ops = remote_ops;
7266 extended_remote_ops.to_shortname = "extended-remote";
7267 extended_remote_ops.to_longname =
7268 "Extended remote serial target in gdb-specific protocol";
7269 extended_remote_ops.to_doc =
7270 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
7271 Specify the serial device it is connected to (e.g. /dev/ttya).",
7272 extended_remote_ops.to_open = extended_remote_open;
7273 extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
7274 extended_remote_ops.to_mourn_inferior = extended_remote_mourn;
7275 extended_remote_ops.to_detach = extended_remote_detach;
7276 extended_remote_ops.to_attach = extended_remote_attach;
7279 static int
7280 remote_can_async_p (void)
7282 /* We're async whenever the serial device is. */
7283 return (current_target.to_async_mask_value) && serial_can_async_p (remote_desc);
7286 static int
7287 remote_is_async_p (void)
7289 /* We're async whenever the serial device is. */
7290 return (current_target.to_async_mask_value) && serial_is_async_p (remote_desc);
7293 /* Pass the SERIAL event on and up to the client. One day this code
7294 will be able to delay notifying the client of an event until the
7295 point where an entire packet has been received. */
7297 static void (*async_client_callback) (enum inferior_event_type event_type,
7298 void *context);
7299 static void *async_client_context;
7300 static serial_event_ftype remote_async_serial_handler;
7302 static void
7303 remote_async_serial_handler (struct serial *scb, void *context)
7305 /* Don't propogate error information up to the client. Instead let
7306 the client find out about the error by querying the target. */
7307 async_client_callback (INF_REG_EVENT, async_client_context);
7310 static void
7311 remote_async (void (*callback) (enum inferior_event_type event_type,
7312 void *context), void *context)
7314 if (current_target.to_async_mask_value == 0)
7315 internal_error (__FILE__, __LINE__,
7316 _("Calling remote_async when async is masked"));
7318 if (callback != NULL)
7320 serial_async (remote_desc, remote_async_serial_handler, NULL);
7321 async_client_callback = callback;
7322 async_client_context = context;
7324 else
7325 serial_async (remote_desc, NULL, NULL);
7328 /* Target async and target extended-async.
7330 This are temporary targets, until it is all tested. Eventually
7331 async support will be incorporated int the usual 'remote'
7332 target. */
7334 static void
7335 init_remote_async_ops (void)
7337 remote_async_ops.to_shortname = "async";
7338 remote_async_ops.to_longname =
7339 "Remote serial target in async version of the gdb-specific protocol";
7340 remote_async_ops.to_doc =
7341 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
7342 Specify the serial device it is connected to (e.g. /dev/ttya).";
7343 remote_async_ops.to_open = remote_async_open;
7344 remote_async_ops.to_close = remote_close;
7345 remote_async_ops.to_detach = remote_detach;
7346 remote_async_ops.to_disconnect = remote_disconnect;
7347 remote_async_ops.to_resume = remote_async_resume;
7348 remote_async_ops.to_wait = remote_async_wait;
7349 remote_async_ops.to_fetch_registers = remote_fetch_registers;
7350 remote_async_ops.to_store_registers = remote_store_registers;
7351 remote_async_ops.to_prepare_to_store = remote_prepare_to_store;
7352 remote_async_ops.deprecated_xfer_memory = remote_xfer_memory;
7353 remote_async_ops.to_files_info = remote_files_info;
7354 remote_async_ops.to_insert_breakpoint = remote_insert_breakpoint;
7355 remote_async_ops.to_remove_breakpoint = remote_remove_breakpoint;
7356 remote_async_ops.to_can_use_hw_breakpoint = remote_check_watch_resources;
7357 remote_async_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint;
7358 remote_async_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint;
7359 remote_async_ops.to_insert_watchpoint = remote_insert_watchpoint;
7360 remote_async_ops.to_remove_watchpoint = remote_remove_watchpoint;
7361 remote_async_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint;
7362 remote_async_ops.to_stopped_data_address = remote_stopped_data_address;
7363 remote_async_ops.to_terminal_inferior = remote_async_terminal_inferior;
7364 remote_async_ops.to_terminal_ours = remote_async_terminal_ours;
7365 remote_async_ops.to_kill = remote_async_kill;
7366 remote_async_ops.to_load = generic_load;
7367 remote_async_ops.to_mourn_inferior = remote_async_mourn;
7368 remote_async_ops.to_thread_alive = remote_thread_alive;
7369 remote_async_ops.to_find_new_threads = remote_threads_info;
7370 remote_async_ops.to_pid_to_str = remote_pid_to_str;
7371 remote_async_ops.to_extra_thread_info = remote_threads_extra_info;
7372 remote_async_ops.to_stop = remote_stop;
7373 remote_async_ops.to_xfer_partial = remote_xfer_partial;
7374 remote_async_ops.to_rcmd = remote_rcmd;
7375 remote_async_ops.to_stratum = process_stratum;
7376 remote_async_ops.to_has_all_memory = 1;
7377 remote_async_ops.to_has_memory = 1;
7378 remote_async_ops.to_has_stack = 1;
7379 remote_async_ops.to_has_registers = 1;
7380 remote_async_ops.to_has_execution = 1;
7381 remote_async_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
7382 remote_async_ops.to_can_async_p = remote_can_async_p;
7383 remote_async_ops.to_is_async_p = remote_is_async_p;
7384 remote_async_ops.to_async = remote_async;
7385 remote_async_ops.to_async_mask_value = 1;
7386 remote_async_ops.to_magic = OPS_MAGIC;
7387 remote_async_ops.to_memory_map = remote_memory_map;
7388 remote_async_ops.to_flash_erase = remote_flash_erase;
7389 remote_async_ops.to_flash_done = remote_flash_done;
7390 remote_async_ops.to_read_description = remote_read_description;
7393 /* Set up the async extended remote vector by making a copy of the standard
7394 remote vector and adding to it. */
7396 static void
7397 init_extended_async_remote_ops (void)
7399 extended_async_remote_ops = remote_async_ops;
7401 extended_async_remote_ops.to_shortname = "extended-async";
7402 extended_async_remote_ops.to_longname =
7403 "Extended remote serial target in async gdb-specific protocol";
7404 extended_async_remote_ops.to_doc =
7405 "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
7406 Specify the serial device it is connected to (e.g. /dev/ttya).",
7407 extended_async_remote_ops.to_open = extended_remote_async_open;
7408 extended_async_remote_ops.to_create_inferior = extended_remote_async_create_inferior;
7409 extended_async_remote_ops.to_mourn_inferior = extended_async_remote_mourn;
7410 extended_async_remote_ops.to_detach = extended_remote_detach;
7411 extended_async_remote_ops.to_attach = extended_async_remote_attach;
7414 static void
7415 set_remote_cmd (char *args, int from_tty)
7417 help_list (remote_set_cmdlist, "set remote ", -1, gdb_stdout);
7420 static void
7421 show_remote_cmd (char *args, int from_tty)
7423 /* We can't just use cmd_show_list here, because we want to skip
7424 the redundant "show remote Z-packet" and the legacy aliases. */
7425 struct cleanup *showlist_chain;
7426 struct cmd_list_element *list = remote_show_cmdlist;
7428 showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist");
7429 for (; list != NULL; list = list->next)
7430 if (strcmp (list->name, "Z-packet") == 0)
7431 continue;
7432 else if (list->type == not_set_cmd)
7433 /* Alias commands are exactly like the original, except they
7434 don't have the normal type. */
7435 continue;
7436 else
7438 struct cleanup *option_chain
7439 = make_cleanup_ui_out_tuple_begin_end (uiout, "option");
7440 ui_out_field_string (uiout, "name", list->name);
7441 ui_out_text (uiout, ": ");
7442 if (list->type == show_cmd)
7443 do_setshow_command ((char *) NULL, from_tty, list);
7444 else
7445 cmd_func (list, NULL, from_tty);
7446 /* Close the tuple. */
7447 do_cleanups (option_chain);
7450 /* Close the tuple. */
7451 do_cleanups (showlist_chain);
7455 /* Function to be called whenever a new objfile (shlib) is detected. */
7456 static void
7457 remote_new_objfile (struct objfile *objfile)
7459 if (remote_desc != 0) /* Have a remote connection. */
7460 remote_check_symbols (objfile);
7463 void
7464 _initialize_remote (void)
7466 struct remote_state *rs;
7468 /* architecture specific data */
7469 remote_gdbarch_data_handle =
7470 gdbarch_data_register_post_init (init_remote_state);
7471 remote_g_packet_data_handle =
7472 gdbarch_data_register_pre_init (remote_g_packet_data_init);
7474 /* Initialize the per-target state. At the moment there is only one
7475 of these, not one per target. Only one target is active at a
7476 time. The default buffer size is unimportant; it will be expanded
7477 whenever a larger buffer is needed. */
7478 rs = get_remote_state_raw ();
7479 rs->buf_size = 400;
7480 rs->buf = xmalloc (rs->buf_size);
7482 init_remote_ops ();
7483 add_target (&remote_ops);
7485 init_extended_remote_ops ();
7486 add_target (&extended_remote_ops);
7488 init_remote_async_ops ();
7489 add_target (&remote_async_ops);
7491 init_extended_async_remote_ops ();
7492 add_target (&extended_async_remote_ops);
7494 /* Hook into new objfile notification. */
7495 observer_attach_new_objfile (remote_new_objfile);
7497 #if 0
7498 init_remote_threadtests ();
7499 #endif
7501 /* set/show remote ... */
7503 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
7504 Remote protocol specific variables\n\
7505 Configure various remote-protocol specific variables such as\n\
7506 the packets being used"),
7507 &remote_set_cmdlist, "set remote ",
7508 0 /* allow-unknown */, &setlist);
7509 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
7510 Remote protocol specific variables\n\
7511 Configure various remote-protocol specific variables such as\n\
7512 the packets being used"),
7513 &remote_show_cmdlist, "show remote ",
7514 0 /* allow-unknown */, &showlist);
7516 add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
7517 Compare section data on target to the exec file.\n\
7518 Argument is a single section name (default: all loaded sections)."),
7519 &cmdlist);
7521 add_cmd ("packet", class_maintenance, packet_command, _("\
7522 Send an arbitrary packet to a remote target.\n\
7523 maintenance packet TEXT\n\
7524 If GDB is talking to an inferior via the GDB serial protocol, then\n\
7525 this command sends the string TEXT to the inferior, and displays the\n\
7526 response packet. GDB supplies the initial `$' character, and the\n\
7527 terminating `#' character and checksum."),
7528 &maintenancelist);
7530 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
7531 Set whether to send break if interrupted."), _("\
7532 Show whether to send break if interrupted."), _("\
7533 If set, a break, instead of a cntrl-c, is sent to the remote target."),
7534 NULL, NULL, /* FIXME: i18n: Whether to send break if interrupted is %s. */
7535 &setlist, &showlist);
7537 /* Install commands for configuring memory read/write packets. */
7539 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
7540 Set the maximum number of bytes per memory write packet (deprecated)."),
7541 &setlist);
7542 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
7543 Show the maximum number of bytes per memory write packet (deprecated)."),
7544 &showlist);
7545 add_cmd ("memory-write-packet-size", no_class,
7546 set_memory_write_packet_size, _("\
7547 Set the maximum number of bytes per memory-write packet.\n\
7548 Specify the number of bytes in a packet or 0 (zero) for the\n\
7549 default packet size. The actual limit is further reduced\n\
7550 dependent on the target. Specify ``fixed'' to disable the\n\
7551 further restriction and ``limit'' to enable that restriction."),
7552 &remote_set_cmdlist);
7553 add_cmd ("memory-read-packet-size", no_class,
7554 set_memory_read_packet_size, _("\
7555 Set the maximum number of bytes per memory-read packet.\n\
7556 Specify the number of bytes in a packet or 0 (zero) for the\n\
7557 default packet size. The actual limit is further reduced\n\
7558 dependent on the target. Specify ``fixed'' to disable the\n\
7559 further restriction and ``limit'' to enable that restriction."),
7560 &remote_set_cmdlist);
7561 add_cmd ("memory-write-packet-size", no_class,
7562 show_memory_write_packet_size,
7563 _("Show the maximum number of bytes per memory-write packet."),
7564 &remote_show_cmdlist);
7565 add_cmd ("memory-read-packet-size", no_class,
7566 show_memory_read_packet_size,
7567 _("Show the maximum number of bytes per memory-read packet."),
7568 &remote_show_cmdlist);
7570 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class,
7571 &remote_hw_watchpoint_limit, _("\
7572 Set the maximum number of target hardware watchpoints."), _("\
7573 Show the maximum number of target hardware watchpoints."), _("\
7574 Specify a negative limit for unlimited."),
7575 NULL, NULL, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
7576 &remote_set_cmdlist, &remote_show_cmdlist);
7577 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class,
7578 &remote_hw_breakpoint_limit, _("\
7579 Set the maximum number of target hardware breakpoints."), _("\
7580 Show the maximum number of target hardware breakpoints."), _("\
7581 Specify a negative limit for unlimited."),
7582 NULL, NULL, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
7583 &remote_set_cmdlist, &remote_show_cmdlist);
7585 add_setshow_integer_cmd ("remoteaddresssize", class_obscure,
7586 &remote_address_size, _("\
7587 Set the maximum size of the address (in bits) in a memory packet."), _("\
7588 Show the maximum size of the address (in bits) in a memory packet."), NULL,
7589 NULL,
7590 NULL, /* FIXME: i18n: */
7591 &setlist, &showlist);
7593 add_packet_config_cmd (&remote_protocol_packets[PACKET_X],
7594 "X", "binary-download", 1);
7596 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont],
7597 "vCont", "verbose-resume", 0);
7599 add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals],
7600 "QPassSignals", "pass-signals", 0);
7602 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol],
7603 "qSymbol", "symbol-lookup", 0);
7605 add_packet_config_cmd (&remote_protocol_packets[PACKET_P],
7606 "P", "set-register", 1);
7608 add_packet_config_cmd (&remote_protocol_packets[PACKET_p],
7609 "p", "fetch-register", 1);
7611 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0],
7612 "Z0", "software-breakpoint", 0);
7614 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1],
7615 "Z1", "hardware-breakpoint", 0);
7617 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2],
7618 "Z2", "write-watchpoint", 0);
7620 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3],
7621 "Z3", "read-watchpoint", 0);
7623 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4],
7624 "Z4", "access-watchpoint", 0);
7626 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv],
7627 "qXfer:auxv:read", "read-aux-vector", 0);
7629 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features],
7630 "qXfer:features:read", "target-features", 0);
7632 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries],
7633 "qXfer:libraries:read", "library-info", 0);
7635 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map],
7636 "qXfer:memory-map:read", "memory-map", 0);
7638 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read],
7639 "qXfer:spu:read", "read-spu-object", 0);
7641 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write],
7642 "qXfer:spu:write", "write-spu-object", 0);
7644 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
7645 "qGetTLSAddr", "get-thread-local-storage-address",
7648 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported],
7649 "qSupported", "supported-packets", 0);
7651 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open],
7652 "vFile:open", "hostio-open", 0);
7654 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread],
7655 "vFile:pread", "hostio-pread", 0);
7657 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite],
7658 "vFile:pwrite", "hostio-pwrite", 0);
7660 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close],
7661 "vFile:close", "hostio-close", 0);
7663 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink],
7664 "vFile:unlink", "hostio-unlink", 0);
7666 add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach],
7667 "vAttach", "attach", 0);
7669 add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
7670 "vRun", "run", 0);
7672 /* Keep the old ``set remote Z-packet ...'' working. Each individual
7673 Z sub-packet has its own set and show commands, but users may
7674 have sets to this variable in their .gdbinit files (or in their
7675 documentation). */
7676 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
7677 &remote_Z_packet_detect, _("\
7678 Set use of remote protocol `Z' packets"), _("\
7679 Show use of remote protocol `Z' packets "), _("\
7680 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
7681 packets."),
7682 set_remote_protocol_Z_packet_cmd,
7683 show_remote_protocol_Z_packet_cmd, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
7684 &remote_set_cmdlist, &remote_show_cmdlist);
7686 add_prefix_cmd ("remote", class_files, remote_command, _("\
7687 Manipulate files on the remote system\n\
7688 Transfer files to and from the remote target system."),
7689 &remote_cmdlist, "remote ",
7690 0 /* allow-unknown */, &cmdlist);
7692 add_cmd ("put", class_files, remote_put_command,
7693 _("Copy a local file to the remote system."),
7694 &remote_cmdlist);
7696 add_cmd ("get", class_files, remote_get_command,
7697 _("Copy a remote file to the local system."),
7698 &remote_cmdlist);
7700 add_cmd ("delete", class_files, remote_delete_command,
7701 _("Delete a remote file."),
7702 &remote_cmdlist);
7704 remote_exec_file = xstrdup ("");
7705 add_setshow_string_noescape_cmd ("exec-file", class_files,
7706 &remote_exec_file, _("\
7707 Set the remote pathname for \"run\""), _("\
7708 Show the remote pathname for \"run\""), NULL, NULL, NULL,
7709 &remote_set_cmdlist, &remote_show_cmdlist);
7711 /* Eventually initialize fileio. See fileio.c */
7712 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);