1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
4 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
24 /* See the GDB User Guide for details of the GDB remote protocol. */
27 #include "gdb_string.h"
33 #include "exceptions.h"
35 /*#include "terminal.h" */
38 #include "gdb-stabs.h"
39 #include "gdbthread.h"
43 #include "gdb_assert.h"
46 #include "cli/cli-decode.h"
47 #include "cli/cli-setshow.h"
52 #include "event-loop.h"
53 #include "event-top.h"
59 #include "gdbcore.h" /* for exec_bfd */
61 #include "remote-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 build_remote_gdbarch_data (void);
89 static void remote_files_info (struct target_ops
*ignore
);
91 static void remote_prepare_to_store (void);
93 static void remote_fetch_registers (int regno
);
95 static void remote_resume (ptid_t ptid
, int step
,
96 enum target_signal siggnal
);
97 static void remote_async_resume (ptid_t ptid
, int step
,
98 enum target_signal siggnal
);
99 static void remote_open (char *name
, int from_tty
);
100 static void remote_async_open (char *name
, int from_tty
);
102 static void extended_remote_open (char *name
, int from_tty
);
103 static void extended_remote_async_open (char *name
, int from_tty
);
105 static void remote_open_1 (char *, int, struct target_ops
*, int extended_p
,
108 static void remote_close (int quitting
);
110 static void remote_store_registers (int regno
);
112 static void remote_mourn (void);
113 static void remote_async_mourn (void);
115 static void extended_remote_restart (void);
117 static void extended_remote_mourn (void);
119 static void remote_mourn_1 (struct target_ops
*);
121 static void remote_send (char **buf
, long *sizeof_buf_p
);
123 static int readchar (int timeout
);
125 static ptid_t
remote_wait (ptid_t ptid
,
126 struct target_waitstatus
*status
);
127 static ptid_t
remote_async_wait (ptid_t ptid
,
128 struct target_waitstatus
*status
);
130 static void remote_kill (void);
131 static void remote_async_kill (void);
133 static int tohex (int nib
);
135 static void remote_detach (char *args
, int from_tty
);
137 static void remote_interrupt (int signo
);
139 static void remote_interrupt_twice (int signo
);
141 static void interrupt_query (void);
143 static void set_thread (int, int);
145 static int remote_thread_alive (ptid_t
);
147 static void get_offsets (void);
149 static void skip_frame (void);
151 static long read_frame (char **buf_p
, long *sizeof_buf
);
153 static int hexnumlen (ULONGEST num
);
155 static void init_remote_ops (void);
157 static void init_extended_remote_ops (void);
159 static void remote_stop (void);
161 static int ishex (int ch
, int *val
);
163 static int stubhex (int ch
);
165 static int hexnumstr (char *, ULONGEST
);
167 static int hexnumnstr (char *, ULONGEST
, int);
169 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
171 static void print_packet (char *);
173 static unsigned long crc32 (unsigned char *, int, unsigned int);
175 static void compare_sections_command (char *, int);
177 static void packet_command (char *, int);
179 static int stub_unpack_int (char *buff
, int fieldlength
);
181 static ptid_t
remote_current_thread (ptid_t oldptid
);
183 static void remote_find_new_threads (void);
185 static void record_currthread (int currthread
);
187 static int fromhex (int a
);
189 static int hex2bin (const char *hex
, gdb_byte
*bin
, int count
);
191 static int bin2hex (const gdb_byte
*bin
, char *hex
, int count
);
193 static int putpkt_binary (char *buf
, int cnt
);
195 static void check_binary_download (CORE_ADDR addr
);
197 struct packet_config
;
199 static void show_packet_config_cmd (struct packet_config
*config
);
201 static void update_packet_config (struct packet_config
*config
);
203 static void set_remote_protocol_packet_cmd (char *args
, int from_tty
,
204 struct cmd_list_element
*c
);
206 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
208 struct cmd_list_element
*c
,
211 void _initialize_remote (void);
213 /* For "set remote" and "show remote". */
215 static struct cmd_list_element
*remote_set_cmdlist
;
216 static struct cmd_list_element
*remote_show_cmdlist
;
218 /* Description of the remote protocol state for the currently
219 connected target. This is per-target state, and independent of the
220 selected architecture. */
224 /* A buffer to use for incoming packets, and its current size. The
225 buffer is grown dynamically for larger incoming packets.
226 Outgoing packets may also be constructed in this buffer.
227 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
228 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
233 /* If we negotiated packet size explicitly (and thus can bypass
234 heuristics for the largest packet size that will not overflow
235 a buffer in the stub), this will be set to that packet size.
236 Otherwise zero, meaning to use the guessed size. */
237 long explicit_packet_size
;
240 /* This data could be associated with a target, but we do not always
241 have access to the current target when we need it, so for now it is
242 static. This will be fine for as long as only one target is in use
244 static struct remote_state remote_state
;
246 static struct remote_state
*
247 get_remote_state_raw (void)
249 return &remote_state
;
252 /* Description of the remote protocol for a given architecture. */
256 long offset
; /* Offset into G packet. */
257 long regnum
; /* GDB's internal register number. */
258 LONGEST pnum
; /* Remote protocol register number. */
259 int in_g_packet
; /* Always part of G packet. */
260 /* long size in bytes; == register_size (current_gdbarch, regnum);
262 /* char *name; == REGISTER_NAME (regnum); at present. */
265 struct remote_arch_state
267 /* Description of the remote protocol registers. */
268 long sizeof_g_packet
;
270 /* Description of the remote protocol registers indexed by REGNUM
271 (making an array of NUM_REGS + NUM_PSEUDO_REGS in size). */
272 struct packet_reg
*regs
;
274 /* This is the size (in chars) of the first response to the ``g''
275 packet. It is used as a heuristic when determining the maximum
276 size of memory-read and memory-write packets. A target will
277 typically only reserve a buffer large enough to hold the ``g''
278 packet. The size does not include packet overhead (headers and
280 long actual_register_packet_size
;
282 /* This is the maximum size (in chars) of a non read/write packet.
283 It is also used as a cap on the size of read/write packets. */
284 long remote_packet_size
;
288 /* Handle for retreving the remote protocol data from gdbarch. */
289 static struct gdbarch_data
*remote_gdbarch_data_handle
;
291 static struct remote_arch_state
*
292 get_remote_arch_state (void)
294 return gdbarch_data (current_gdbarch
, remote_gdbarch_data_handle
);
297 /* Fetch the global remote target state. */
299 static struct remote_state
*
300 get_remote_state (void)
302 /* Make sure that the remote architecture state has been
303 initialized, because doing so might reallocate rs->buf. Any
304 function which calls getpkt also needs to be mindful of changes
305 to rs->buf, but this call limits the number of places which run
307 get_remote_arch_state ();
309 return get_remote_state_raw ();
313 init_remote_state (struct gdbarch
*gdbarch
)
316 struct remote_state
*rs
= get_remote_state_raw ();
317 struct remote_arch_state
*rsa
;
319 rsa
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_arch_state
);
321 rsa
->sizeof_g_packet
= 0;
323 /* Assume a 1:1 regnum<->pnum table. */
324 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
, NUM_REGS
+ NUM_PSEUDO_REGS
,
326 for (regnum
= 0; regnum
< NUM_REGS
+ NUM_PSEUDO_REGS
; regnum
++)
328 struct packet_reg
*r
= &rsa
->regs
[regnum
];
331 r
->offset
= DEPRECATED_REGISTER_BYTE (regnum
);
332 r
->in_g_packet
= (regnum
< NUM_REGS
);
333 /* ...name = REGISTER_NAME (regnum); */
335 /* Compute packet size by accumulating the size of all registers. */
336 if (regnum
< NUM_REGS
)
337 rsa
->sizeof_g_packet
+= register_size (current_gdbarch
, regnum
);
340 /* Default maximum number of characters in a packet body. Many
341 remote stubs have a hardwired buffer size of 400 bytes
342 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
343 as the maximum packet-size to ensure that the packet and an extra
344 NUL character can always fit in the buffer. This stops GDB
345 trashing stubs that try to squeeze an extra NUL into what is
346 already a full buffer (As of 1999-12-04 that was most stubs). */
347 rsa
->remote_packet_size
= 400 - 1;
349 /* This one is filled in when a ``g'' packet is received. */
350 rsa
->actual_register_packet_size
= 0;
352 /* Should rsa->sizeof_g_packet needs more space than the
353 default, adjust the size accordingly. Remember that each byte is
354 encoded as two characters. 32 is the overhead for the packet
355 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
356 (``$NN:G...#NN'') is a better guess, the below has been padded a
358 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
359 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
361 /* Make sure that the packet buffer is plenty big enough for
362 this architecture. */
363 if (rs
->buf_size
< rsa
->remote_packet_size
)
365 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
366 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
372 /* Return the current allowed size of a remote packet. This is
373 inferred from the current architecture, and should be used to
374 limit the length of outgoing packets. */
376 get_remote_packet_size (void)
378 struct remote_state
*rs
= get_remote_state ();
379 struct remote_arch_state
*rsa
= get_remote_arch_state ();
381 if (rs
->explicit_packet_size
)
382 return rs
->explicit_packet_size
;
384 return rsa
->remote_packet_size
;
387 static struct packet_reg
*
388 packet_reg_from_regnum (struct remote_arch_state
*rsa
, long regnum
)
390 if (regnum
< 0 && regnum
>= NUM_REGS
+ NUM_PSEUDO_REGS
)
394 struct packet_reg
*r
= &rsa
->regs
[regnum
];
395 gdb_assert (r
->regnum
== regnum
);
400 static struct packet_reg
*
401 packet_reg_from_pnum (struct remote_arch_state
*rsa
, LONGEST pnum
)
404 for (i
= 0; i
< NUM_REGS
+ NUM_PSEUDO_REGS
; i
++)
406 struct packet_reg
*r
= &rsa
->regs
[i
];
413 /* FIXME: graces/2002-08-08: These variables should eventually be
414 bound to an instance of the target object (as in gdbarch-tdep()),
415 when such a thing exists. */
417 /* This is set to the data address of the access causing the target
418 to stop for a watchpoint. */
419 static CORE_ADDR remote_watch_data_address
;
421 /* This is non-zero if target stopped for a watchpoint. */
422 static int remote_stopped_by_watchpoint_p
;
424 static struct target_ops remote_ops
;
426 static struct target_ops extended_remote_ops
;
428 /* Temporary target ops. Just like the remote_ops and
429 extended_remote_ops, but with asynchronous support. */
430 static struct target_ops remote_async_ops
;
432 static struct target_ops extended_async_remote_ops
;
434 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
435 ``forever'' still use the normal timeout mechanism. This is
436 currently used by the ASYNC code to guarentee that target reads
437 during the initial connect always time-out. Once getpkt has been
438 modified to return a timeout indication and, in turn
439 remote_wait()/wait_for_inferior() have gained a timeout parameter
441 static int wait_forever_enabled_p
= 1;
444 /* This variable chooses whether to send a ^C or a break when the user
445 requests program interruption. Although ^C is usually what remote
446 systems expect, and that is the default here, sometimes a break is
447 preferable instead. */
449 static int remote_break
;
451 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
452 remote_open knows that we don't have a file open when the program
454 static struct serial
*remote_desc
= NULL
;
456 /* This variable sets the number of bits in an address that are to be
457 sent in a memory ("M" or "m") packet. Normally, after stripping
458 leading zeros, the entire address would be sent. This variable
459 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
460 initial implementation of remote.c restricted the address sent in
461 memory packets to ``host::sizeof long'' bytes - (typically 32
462 bits). Consequently, for 64 bit targets, the upper 32 bits of an
463 address was never sent. Since fixing this bug may cause a break in
464 some remote targets this variable is principly provided to
465 facilitate backward compatibility. */
467 static int remote_address_size
;
469 /* Tempoary to track who currently owns the terminal. See
470 target_async_terminal_* for more details. */
472 static int remote_async_terminal_ours_p
;
475 /* User configurable variables for the number of characters in a
476 memory read/write packet. MIN (rsa->remote_packet_size,
477 rsa->sizeof_g_packet) is the default. Some targets need smaller
478 values (fifo overruns, et.al.) and some users need larger values
479 (speed up transfers). The variables ``preferred_*'' (the user
480 request), ``current_*'' (what was actually set) and ``forced_*''
481 (Positive - a soft limit, negative - a hard limit). */
483 struct memory_packet_config
490 /* Compute the current size of a read/write packet. Since this makes
491 use of ``actual_register_packet_size'' the computation is dynamic. */
494 get_memory_packet_size (struct memory_packet_config
*config
)
496 struct remote_state
*rs
= get_remote_state ();
497 struct remote_arch_state
*rsa
= get_remote_arch_state ();
499 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
500 law?) that some hosts don't cope very well with large alloca()
501 calls. Eventually the alloca() code will be replaced by calls to
502 xmalloc() and make_cleanups() allowing this restriction to either
503 be lifted or removed. */
504 #ifndef MAX_REMOTE_PACKET_SIZE
505 #define MAX_REMOTE_PACKET_SIZE 16384
507 /* NOTE: 20 ensures we can write at least one byte. */
508 #ifndef MIN_REMOTE_PACKET_SIZE
509 #define MIN_REMOTE_PACKET_SIZE 20
514 if (config
->size
<= 0)
515 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
517 what_they_get
= config
->size
;
521 what_they_get
= get_remote_packet_size ();
522 /* Limit the packet to the size specified by the user. */
524 && what_they_get
> config
->size
)
525 what_they_get
= config
->size
;
527 /* Limit it to the size of the targets ``g'' response unless we have
528 permission from the stub to use a larger packet size. */
529 if (rs
->explicit_packet_size
== 0
530 && rsa
->actual_register_packet_size
> 0
531 && what_they_get
> rsa
->actual_register_packet_size
)
532 what_they_get
= rsa
->actual_register_packet_size
;
534 if (what_they_get
> MAX_REMOTE_PACKET_SIZE
)
535 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
536 if (what_they_get
< MIN_REMOTE_PACKET_SIZE
)
537 what_they_get
= MIN_REMOTE_PACKET_SIZE
;
539 /* Make sure there is room in the global buffer for this packet
540 (including its trailing NUL byte). */
541 if (rs
->buf_size
< what_they_get
+ 1)
543 rs
->buf_size
= 2 * what_they_get
;
544 rs
->buf
= xrealloc (rs
->buf
, 2 * what_they_get
);
547 return what_they_get
;
550 /* Update the size of a read/write packet. If they user wants
551 something really big then do a sanity check. */
554 set_memory_packet_size (char *args
, struct memory_packet_config
*config
)
556 int fixed_p
= config
->fixed_p
;
557 long size
= config
->size
;
559 error (_("Argument required (integer, `fixed' or `limited')."));
560 else if (strcmp (args
, "hard") == 0
561 || strcmp (args
, "fixed") == 0)
563 else if (strcmp (args
, "soft") == 0
564 || strcmp (args
, "limit") == 0)
569 size
= strtoul (args
, &end
, 0);
571 error (_("Invalid %s (bad syntax)."), config
->name
);
573 /* Instead of explicitly capping the size of a packet to
574 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
575 instead allowed to set the size to something arbitrarily
577 if (size
> MAX_REMOTE_PACKET_SIZE
)
578 error (_("Invalid %s (too large)."), config
->name
);
582 if (fixed_p
&& !config
->fixed_p
)
584 if (! query (_("The target may not be able to correctly handle a %s\n"
585 "of %ld bytes. Change the packet size? "),
587 error (_("Packet size not changed."));
589 /* Update the config. */
590 config
->fixed_p
= fixed_p
;
595 show_memory_packet_size (struct memory_packet_config
*config
)
597 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
599 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
600 get_memory_packet_size (config
));
602 printf_filtered (_("Packets are limited to %ld bytes.\n"),
603 get_memory_packet_size (config
));
606 static struct memory_packet_config memory_write_packet_config
=
608 "memory-write-packet-size",
612 set_memory_write_packet_size (char *args
, int from_tty
)
614 set_memory_packet_size (args
, &memory_write_packet_config
);
618 show_memory_write_packet_size (char *args
, int from_tty
)
620 show_memory_packet_size (&memory_write_packet_config
);
624 get_memory_write_packet_size (void)
626 return get_memory_packet_size (&memory_write_packet_config
);
629 static struct memory_packet_config memory_read_packet_config
=
631 "memory-read-packet-size",
635 set_memory_read_packet_size (char *args
, int from_tty
)
637 set_memory_packet_size (args
, &memory_read_packet_config
);
641 show_memory_read_packet_size (char *args
, int from_tty
)
643 show_memory_packet_size (&memory_read_packet_config
);
647 get_memory_read_packet_size (void)
649 long size
= get_memory_packet_size (&memory_read_packet_config
);
650 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
651 extra buffer size argument before the memory read size can be
652 increased beyond this. */
653 if (size
> get_remote_packet_size ())
654 size
= get_remote_packet_size ();
659 /* Generic configuration support for packets the stub optionally
660 supports. Allows the user to specify the use of the packet as well
661 as allowing GDB to auto-detect support in the remote stub. */
665 PACKET_SUPPORT_UNKNOWN
= 0,
674 enum auto_boolean detect
;
675 enum packet_support support
;
678 /* Analyze a packet's return value and update the packet config
689 update_packet_config (struct packet_config
*config
)
691 switch (config
->detect
)
693 case AUTO_BOOLEAN_TRUE
:
694 config
->support
= PACKET_ENABLE
;
696 case AUTO_BOOLEAN_FALSE
:
697 config
->support
= PACKET_DISABLE
;
699 case AUTO_BOOLEAN_AUTO
:
700 config
->support
= PACKET_SUPPORT_UNKNOWN
;
706 show_packet_config_cmd (struct packet_config
*config
)
708 char *support
= "internal-error";
709 switch (config
->support
)
715 support
= "disabled";
717 case PACKET_SUPPORT_UNKNOWN
:
721 switch (config
->detect
)
723 case AUTO_BOOLEAN_AUTO
:
724 printf_filtered (_("Support for the `%s' packet is auto-detected, currently %s.\n"),
725 config
->name
, support
);
727 case AUTO_BOOLEAN_TRUE
:
728 case AUTO_BOOLEAN_FALSE
:
729 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
730 config
->name
, support
);
736 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
737 const char *title
, int legacy
)
744 config
->title
= title
;
745 config
->detect
= AUTO_BOOLEAN_AUTO
;
746 config
->support
= PACKET_SUPPORT_UNKNOWN
;
747 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
749 show_doc
= xstrprintf ("Show current use of remote protocol `%s' (%s) packet",
751 /* set/show TITLE-packet {auto,on,off} */
752 cmd_name
= xstrprintf ("%s-packet", title
);
753 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
754 &config
->detect
, set_doc
, show_doc
, NULL
, /* help_doc */
755 set_remote_protocol_packet_cmd
,
756 show_remote_protocol_packet_cmd
,
757 &remote_set_cmdlist
, &remote_show_cmdlist
);
758 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
762 legacy_name
= xstrprintf ("%s-packet", name
);
763 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
764 &remote_set_cmdlist
);
765 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
766 &remote_show_cmdlist
);
770 static enum packet_result
771 packet_check_result (const char *buf
)
775 /* The stub recognized the packet request. Check that the
776 operation succeeded. */
778 && isxdigit (buf
[1]) && isxdigit (buf
[2])
780 /* "Enn" - definitly an error. */
783 /* Always treat "E." as an error. This will be used for
784 more verbose error messages, such as E.memtypes. */
785 if (buf
[0] == 'E' && buf
[1] == '.')
788 /* The packet may or may not be OK. Just assume it is. */
792 /* The stub does not support the packet. */
793 return PACKET_UNKNOWN
;
796 static enum packet_result
797 packet_ok (const char *buf
, struct packet_config
*config
)
799 enum packet_result result
;
801 result
= packet_check_result (buf
);
806 /* The stub recognized the packet request. */
807 switch (config
->support
)
809 case PACKET_SUPPORT_UNKNOWN
:
811 fprintf_unfiltered (gdb_stdlog
,
812 "Packet %s (%s) is supported\n",
813 config
->name
, config
->title
);
814 config
->support
= PACKET_ENABLE
;
817 internal_error (__FILE__
, __LINE__
,
818 _("packet_ok: attempt to use a disabled packet"));
825 /* The stub does not support the packet. */
826 switch (config
->support
)
829 if (config
->detect
== AUTO_BOOLEAN_AUTO
)
830 /* If the stub previously indicated that the packet was
831 supported then there is a protocol error.. */
832 error (_("Protocol error: %s (%s) conflicting enabled responses."),
833 config
->name
, config
->title
);
835 /* The user set it wrong. */
836 error (_("Enabled packet %s (%s) not recognized by stub"),
837 config
->name
, config
->title
);
839 case PACKET_SUPPORT_UNKNOWN
:
841 fprintf_unfiltered (gdb_stdlog
,
842 "Packet %s (%s) is NOT supported\n",
843 config
->name
, config
->title
);
844 config
->support
= PACKET_DISABLE
;
867 PACKET_qXfer_memory_map
,
874 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
877 set_remote_protocol_packet_cmd (char *args
, int from_tty
,
878 struct cmd_list_element
*c
)
880 struct packet_config
*packet
;
882 for (packet
= remote_protocol_packets
;
883 packet
< &remote_protocol_packets
[PACKET_MAX
];
886 if (&packet
->detect
== c
->var
)
888 update_packet_config (packet
);
892 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
897 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
898 struct cmd_list_element
*c
,
901 struct packet_config
*packet
;
903 for (packet
= remote_protocol_packets
;
904 packet
< &remote_protocol_packets
[PACKET_MAX
];
907 if (&packet
->detect
== c
->var
)
909 show_packet_config_cmd (packet
);
913 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
917 /* Should we try one of the 'Z' requests? */
921 Z_PACKET_SOFTWARE_BP
,
922 Z_PACKET_HARDWARE_BP
,
929 /* For compatibility with older distributions. Provide a ``set remote
930 Z-packet ...'' command that updates all the Z packet types. */
932 static enum auto_boolean remote_Z_packet_detect
;
935 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
936 struct cmd_list_element
*c
)
939 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
941 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
942 update_packet_config (&remote_protocol_packets
[PACKET_Z0
+ i
]);
947 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
948 struct cmd_list_element
*c
,
952 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
954 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
958 /* Should we try the 'ThreadInfo' query packet?
960 This variable (NOT available to the user: auto-detect only!)
961 determines whether GDB will use the new, simpler "ThreadInfo"
962 query or the older, more complex syntax for thread queries.
963 This is an auto-detect variable (set to true at each connect,
964 and set to false when the target fails to recognize it). */
966 static int use_threadinfo_query
;
967 static int use_threadextra_query
;
969 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
970 static void *sigint_remote_twice_token
;
971 static void *sigint_remote_token
;
973 /* These are pointers to hook functions that may be set in order to
974 modify resume/wait behavior for a particular architecture. */
976 void (*deprecated_target_resume_hook
) (void);
977 void (*deprecated_target_wait_loop_hook
) (void);
981 /* These are the threads which we last sent to the remote system.
982 -1 for all or -2 for not sent yet. */
983 static int general_thread
;
984 static int continue_thread
;
986 /* Call this function as a result of
987 1) A halt indication (T packet) containing a thread id
988 2) A direct query of currthread
989 3) Successful execution of set thread
993 record_currthread (int currthread
)
995 general_thread
= currthread
;
997 /* If this is a new thread, add it to GDB's thread list.
998 If we leave it up to WFI to do this, bad things will happen. */
999 if (!in_thread_list (pid_to_ptid (currthread
)))
1001 add_thread (pid_to_ptid (currthread
));
1002 ui_out_text (uiout
, "[New ");
1003 ui_out_text (uiout
, target_pid_to_str (pid_to_ptid (currthread
)));
1004 ui_out_text (uiout
, "]\n");
1008 static char *last_pass_packet
;
1010 /* If 'QPassSignals' is supported, tell the remote stub what signals
1011 it can simply pass through to the inferior without reporting. */
1014 remote_pass_signals (void)
1016 if (remote_protocol_packets
[PACKET_QPassSignals
].support
!= PACKET_DISABLE
)
1018 char *pass_packet
, *p
;
1019 int numsigs
= (int) TARGET_SIGNAL_LAST
;
1022 gdb_assert (numsigs
< 256);
1023 for (i
= 0; i
< numsigs
; i
++)
1025 if (signal_stop_state (i
) == 0
1026 && signal_print_state (i
) == 0
1027 && signal_pass_state (i
) == 1)
1030 pass_packet
= xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
1031 strcpy (pass_packet
, "QPassSignals:");
1032 p
= pass_packet
+ strlen (pass_packet
);
1033 for (i
= 0; i
< numsigs
; i
++)
1035 if (signal_stop_state (i
) == 0
1036 && signal_print_state (i
) == 0
1037 && signal_pass_state (i
) == 1)
1040 *p
++ = tohex (i
>> 4);
1041 *p
++ = tohex (i
& 15);
1050 if (!last_pass_packet
|| strcmp (last_pass_packet
, pass_packet
))
1052 struct remote_state
*rs
= get_remote_state ();
1053 char *buf
= rs
->buf
;
1055 putpkt (pass_packet
);
1056 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1057 packet_ok (buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
1058 if (last_pass_packet
)
1059 xfree (last_pass_packet
);
1060 last_pass_packet
= pass_packet
;
1063 xfree (pass_packet
);
1067 #define MAGIC_NULL_PID 42000
1070 set_thread (int th
, int gen
)
1072 struct remote_state
*rs
= get_remote_state ();
1073 char *buf
= rs
->buf
;
1074 int state
= gen
? general_thread
: continue_thread
;
1080 buf
[1] = gen
? 'g' : 'c';
1081 if (th
== MAGIC_NULL_PID
)
1087 xsnprintf (&buf
[2], get_remote_packet_size () - 2, "-%x", -th
);
1089 xsnprintf (&buf
[2], get_remote_packet_size () - 2, "%x", th
);
1091 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1093 general_thread
= th
;
1095 continue_thread
= th
;
1098 /* Return nonzero if the thread TH is still alive on the remote system. */
1101 remote_thread_alive (ptid_t ptid
)
1103 struct remote_state
*rs
= get_remote_state ();
1104 int tid
= PIDGET (ptid
);
1107 xsnprintf (rs
->buf
, get_remote_packet_size (), "T-%08x", -tid
);
1109 xsnprintf (rs
->buf
, get_remote_packet_size (), "T%08x", tid
);
1111 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1112 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
1115 /* About these extended threadlist and threadinfo packets. They are
1116 variable length packets but, the fields within them are often fixed
1117 length. They are redundent enough to send over UDP as is the
1118 remote protocol in general. There is a matching unit test module
1121 #define OPAQUETHREADBYTES 8
1123 /* a 64 bit opaque identifier */
1124 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
1126 /* WARNING: This threadref data structure comes from the remote O.S.,
1127 libstub protocol encoding, and remote.c. it is not particularly
1130 /* Right now, the internal structure is int. We want it to be bigger.
1134 typedef int gdb_threadref
; /* Internal GDB thread reference. */
1136 /* gdb_ext_thread_info is an internal GDB data structure which is
1137 equivalent to the reply of the remote threadinfo packet. */
1139 struct gdb_ext_thread_info
1141 threadref threadid
; /* External form of thread reference. */
1142 int active
; /* Has state interesting to GDB?
1144 char display
[256]; /* Brief state display, name,
1145 blocked/suspended. */
1146 char shortname
[32]; /* To be used to name threads. */
1147 char more_display
[256]; /* Long info, statistics, queue depth,
1151 /* The volume of remote transfers can be limited by submitting
1152 a mask containing bits specifying the desired information.
1153 Use a union of these values as the 'selection' parameter to
1154 get_thread_info. FIXME: Make these TAG names more thread specific.
1157 #define TAG_THREADID 1
1158 #define TAG_EXISTS 2
1159 #define TAG_DISPLAY 4
1160 #define TAG_THREADNAME 8
1161 #define TAG_MOREDISPLAY 16
1163 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1165 char *unpack_varlen_hex (char *buff
, ULONGEST
*result
);
1167 static char *unpack_nibble (char *buf
, int *val
);
1169 static char *pack_nibble (char *buf
, int nibble
);
1171 static char *pack_hex_byte (char *pkt
, int /* unsigned char */ byte
);
1173 static char *unpack_byte (char *buf
, int *value
);
1175 static char *pack_int (char *buf
, int value
);
1177 static char *unpack_int (char *buf
, int *value
);
1179 static char *unpack_string (char *src
, char *dest
, int length
);
1181 static char *pack_threadid (char *pkt
, threadref
*id
);
1183 static char *unpack_threadid (char *inbuf
, threadref
*id
);
1185 void int_to_threadref (threadref
*id
, int value
);
1187 static int threadref_to_int (threadref
*ref
);
1189 static void copy_threadref (threadref
*dest
, threadref
*src
);
1191 static int threadmatch (threadref
*dest
, threadref
*src
);
1193 static char *pack_threadinfo_request (char *pkt
, int mode
,
1196 static int remote_unpack_thread_info_response (char *pkt
,
1197 threadref
*expectedref
,
1198 struct gdb_ext_thread_info
1202 static int remote_get_threadinfo (threadref
*threadid
,
1203 int fieldset
, /*TAG mask */
1204 struct gdb_ext_thread_info
*info
);
1206 static char *pack_threadlist_request (char *pkt
, int startflag
,
1208 threadref
*nextthread
);
1210 static int parse_threadlist_response (char *pkt
,
1212 threadref
*original_echo
,
1213 threadref
*resultlist
,
1216 static int remote_get_threadlist (int startflag
,
1217 threadref
*nextthread
,
1221 threadref
*threadlist
);
1223 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
1225 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
1226 void *context
, int looplimit
);
1228 static int remote_newthread_step (threadref
*ref
, void *context
);
1230 /* Encode 64 bits in 16 chars of hex. */
1232 static const char hexchars
[] = "0123456789abcdef";
1235 ishex (int ch
, int *val
)
1237 if ((ch
>= 'a') && (ch
<= 'f'))
1239 *val
= ch
- 'a' + 10;
1242 if ((ch
>= 'A') && (ch
<= 'F'))
1244 *val
= ch
- 'A' + 10;
1247 if ((ch
>= '0') && (ch
<= '9'))
1258 if (ch
>= 'a' && ch
<= 'f')
1259 return ch
- 'a' + 10;
1260 if (ch
>= '0' && ch
<= '9')
1262 if (ch
>= 'A' && ch
<= 'F')
1263 return ch
- 'A' + 10;
1268 stub_unpack_int (char *buff
, int fieldlength
)
1275 nibble
= stubhex (*buff
++);
1279 retval
= retval
<< 4;
1285 unpack_varlen_hex (char *buff
, /* packet to parse */
1289 ULONGEST retval
= 0;
1291 while (ishex (*buff
, &nibble
))
1294 retval
= retval
<< 4;
1295 retval
|= nibble
& 0x0f;
1302 unpack_nibble (char *buf
, int *val
)
1304 ishex (*buf
++, val
);
1309 pack_nibble (char *buf
, int nibble
)
1311 *buf
++ = hexchars
[(nibble
& 0x0f)];
1316 pack_hex_byte (char *pkt
, int byte
)
1318 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
1319 *pkt
++ = hexchars
[(byte
& 0xf)];
1324 unpack_byte (char *buf
, int *value
)
1326 *value
= stub_unpack_int (buf
, 2);
1331 pack_int (char *buf
, int value
)
1333 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
1334 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
1335 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
1336 buf
= pack_hex_byte (buf
, (value
& 0xff));
1341 unpack_int (char *buf
, int *value
)
1343 *value
= stub_unpack_int (buf
, 8);
1347 #if 0 /* Currently unused, uncomment when needed. */
1348 static char *pack_string (char *pkt
, char *string
);
1351 pack_string (char *pkt
, char *string
)
1356 len
= strlen (string
);
1358 len
= 200; /* Bigger than most GDB packets, junk??? */
1359 pkt
= pack_hex_byte (pkt
, len
);
1363 if ((ch
== '\0') || (ch
== '#'))
1364 ch
= '*'; /* Protect encapsulation. */
1369 #endif /* 0 (unused) */
1372 unpack_string (char *src
, char *dest
, int length
)
1381 pack_threadid (char *pkt
, threadref
*id
)
1384 unsigned char *altid
;
1386 altid
= (unsigned char *) id
;
1387 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
1389 pkt
= pack_hex_byte (pkt
, *altid
++);
1395 unpack_threadid (char *inbuf
, threadref
*id
)
1398 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
1401 altref
= (char *) id
;
1403 while (inbuf
< limit
)
1405 x
= stubhex (*inbuf
++);
1406 y
= stubhex (*inbuf
++);
1407 *altref
++ = (x
<< 4) | y
;
1412 /* Externally, threadrefs are 64 bits but internally, they are still
1413 ints. This is due to a mismatch of specifications. We would like
1414 to use 64bit thread references internally. This is an adapter
1418 int_to_threadref (threadref
*id
, int value
)
1420 unsigned char *scan
;
1422 scan
= (unsigned char *) id
;
1428 *scan
++ = (value
>> 24) & 0xff;
1429 *scan
++ = (value
>> 16) & 0xff;
1430 *scan
++ = (value
>> 8) & 0xff;
1431 *scan
++ = (value
& 0xff);
1435 threadref_to_int (threadref
*ref
)
1438 unsigned char *scan
;
1444 value
= (value
<< 8) | ((*scan
++) & 0xff);
1449 copy_threadref (threadref
*dest
, threadref
*src
)
1452 unsigned char *csrc
, *cdest
;
1454 csrc
= (unsigned char *) src
;
1455 cdest
= (unsigned char *) dest
;
1462 threadmatch (threadref
*dest
, threadref
*src
)
1464 /* Things are broken right now, so just assume we got a match. */
1466 unsigned char *srcp
, *destp
;
1468 srcp
= (char *) src
;
1469 destp
= (char *) dest
;
1473 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
1480 threadid:1, # always request threadid
1487 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1490 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
1492 *pkt
++ = 'q'; /* Info Query */
1493 *pkt
++ = 'P'; /* process or thread info */
1494 pkt
= pack_int (pkt
, mode
); /* mode */
1495 pkt
= pack_threadid (pkt
, id
); /* threadid */
1496 *pkt
= '\0'; /* terminate */
1500 /* These values tag the fields in a thread info response packet. */
1501 /* Tagging the fields allows us to request specific fields and to
1502 add more fields as time goes by. */
1504 #define TAG_THREADID 1 /* Echo the thread identifier. */
1505 #define TAG_EXISTS 2 /* Is this process defined enough to
1506 fetch registers and its stack? */
1507 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1508 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
1509 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1513 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
1514 struct gdb_ext_thread_info
*info
)
1516 struct remote_state
*rs
= get_remote_state ();
1520 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
1523 /* info->threadid = 0; FIXME: implement zero_threadref. */
1525 info
->display
[0] = '\0';
1526 info
->shortname
[0] = '\0';
1527 info
->more_display
[0] = '\0';
1529 /* Assume the characters indicating the packet type have been
1531 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
1532 pkt
= unpack_threadid (pkt
, &ref
);
1535 warning (_("Incomplete response to threadinfo request."));
1536 if (!threadmatch (&ref
, expectedref
))
1537 { /* This is an answer to a different request. */
1538 warning (_("ERROR RMT Thread info mismatch."));
1541 copy_threadref (&info
->threadid
, &ref
);
1543 /* Loop on tagged fields , try to bail if somthing goes wrong. */
1545 /* Packets are terminated with nulls. */
1546 while ((pkt
< limit
) && mask
&& *pkt
)
1548 pkt
= unpack_int (pkt
, &tag
); /* tag */
1549 pkt
= unpack_byte (pkt
, &length
); /* length */
1550 if (!(tag
& mask
)) /* Tags out of synch with mask. */
1552 warning (_("ERROR RMT: threadinfo tag mismatch."));
1556 if (tag
== TAG_THREADID
)
1560 warning (_("ERROR RMT: length of threadid is not 16."));
1564 pkt
= unpack_threadid (pkt
, &ref
);
1565 mask
= mask
& ~TAG_THREADID
;
1568 if (tag
== TAG_EXISTS
)
1570 info
->active
= stub_unpack_int (pkt
, length
);
1572 mask
= mask
& ~(TAG_EXISTS
);
1575 warning (_("ERROR RMT: 'exists' length too long."));
1581 if (tag
== TAG_THREADNAME
)
1583 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
1584 mask
= mask
& ~TAG_THREADNAME
;
1587 if (tag
== TAG_DISPLAY
)
1589 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
1590 mask
= mask
& ~TAG_DISPLAY
;
1593 if (tag
== TAG_MOREDISPLAY
)
1595 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
1596 mask
= mask
& ~TAG_MOREDISPLAY
;
1599 warning (_("ERROR RMT: unknown thread info tag."));
1600 break; /* Not a tag we know about. */
1606 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
1607 struct gdb_ext_thread_info
*info
)
1609 struct remote_state
*rs
= get_remote_state ();
1612 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
1614 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1615 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
1620 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1623 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
1624 threadref
*nextthread
)
1626 *pkt
++ = 'q'; /* info query packet */
1627 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
1628 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
1629 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
1630 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
1635 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1638 parse_threadlist_response (char *pkt
, int result_limit
,
1639 threadref
*original_echo
, threadref
*resultlist
,
1642 struct remote_state
*rs
= get_remote_state ();
1644 int count
, resultcount
, done
;
1647 /* Assume the 'q' and 'M chars have been stripped. */
1648 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
1649 /* done parse past here */
1650 pkt
= unpack_byte (pkt
, &count
); /* count field */
1651 pkt
= unpack_nibble (pkt
, &done
);
1652 /* The first threadid is the argument threadid. */
1653 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
1654 while ((count
-- > 0) && (pkt
< limit
))
1656 pkt
= unpack_threadid (pkt
, resultlist
++);
1657 if (resultcount
++ >= result_limit
)
1666 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
1667 int *done
, int *result_count
, threadref
*threadlist
)
1669 struct remote_state
*rs
= get_remote_state ();
1670 static threadref echo_nextthread
;
1673 /* Trancate result limit to be smaller than the packet size. */
1674 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10) >= get_remote_packet_size ())
1675 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
1677 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
1679 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1682 parse_threadlist_response (rs
->buf
+ 2, result_limit
, &echo_nextthread
,
1685 if (!threadmatch (&echo_nextthread
, nextthread
))
1687 /* FIXME: This is a good reason to drop the packet. */
1688 /* Possably, there is a duplicate response. */
1690 retransmit immediatly - race conditions
1691 retransmit after timeout - yes
1693 wait for packet, then exit
1695 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
1696 return 0; /* I choose simply exiting. */
1698 if (*result_count
<= 0)
1702 warning (_("RMT ERROR : failed to get remote thread list."));
1705 return result
; /* break; */
1707 if (*result_count
> result_limit
)
1710 warning (_("RMT ERROR: threadlist response longer than requested."));
1716 /* This is the interface between remote and threads, remotes upper
1719 /* remote_find_new_threads retrieves the thread list and for each
1720 thread in the list, looks up the thread in GDB's internal list,
1721 ading the thread if it does not already exist. This involves
1722 getting partial thread lists from the remote target so, polling the
1723 quit_flag is required. */
1726 /* About this many threadisds fit in a packet. */
1728 #define MAXTHREADLISTRESULTS 32
1731 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
1734 int done
, i
, result_count
;
1738 static threadref nextthread
;
1739 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
1744 if (loopcount
++ > looplimit
)
1747 warning (_("Remote fetch threadlist -infinite loop-."));
1750 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
1751 &done
, &result_count
, resultthreadlist
))
1756 /* Clear for later iterations. */
1758 /* Setup to resume next batch of thread references, set nextthread. */
1759 if (result_count
>= 1)
1760 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
1762 while (result_count
--)
1763 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
1770 remote_newthread_step (threadref
*ref
, void *context
)
1774 ptid
= pid_to_ptid (threadref_to_int (ref
));
1776 if (!in_thread_list (ptid
))
1778 return 1; /* continue iterator */
1781 #define CRAZY_MAX_THREADS 1000
1784 remote_current_thread (ptid_t oldpid
)
1786 struct remote_state
*rs
= get_remote_state ();
1789 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1790 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
1791 /* Use strtoul here, so we'll correctly parse values whose highest
1792 bit is set. The protocol carries them as a simple series of
1793 hex digits; in the absence of a sign, strtol will see such
1794 values as positive numbers out of range for signed 'long', and
1795 return LONG_MAX to indicate an overflow. */
1796 return pid_to_ptid (strtoul (&rs
->buf
[2], NULL
, 16));
1801 /* Find new threads for info threads command.
1802 * Original version, using John Metzler's thread protocol.
1806 remote_find_new_threads (void)
1808 remote_threadlist_iterator (remote_newthread_step
, 0,
1810 if (PIDGET (inferior_ptid
) == MAGIC_NULL_PID
) /* ack ack ack */
1811 inferior_ptid
= remote_current_thread (inferior_ptid
);
1815 * Find all threads for info threads command.
1816 * Uses new thread protocol contributed by Cisco.
1817 * Falls back and attempts to use the older method (above)
1818 * if the target doesn't respond to the new method.
1822 remote_threads_info (void)
1824 struct remote_state
*rs
= get_remote_state ();
1828 if (remote_desc
== 0) /* paranoia */
1829 error (_("Command can only be used when connected to the remote target."));
1831 if (use_threadinfo_query
)
1833 putpkt ("qfThreadInfo");
1834 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1836 if (bufp
[0] != '\0') /* q packet recognized */
1838 while (*bufp
++ == 'm') /* reply contains one or more TID */
1842 /* Use strtoul here, so we'll correctly parse values
1843 whose highest bit is set. The protocol carries
1844 them as a simple series of hex digits; in the
1845 absence of a sign, strtol will see such values as
1846 positive numbers out of range for signed 'long',
1847 and return LONG_MAX to indicate an overflow. */
1848 tid
= strtoul (bufp
, &bufp
, 16);
1849 if (tid
!= 0 && !in_thread_list (pid_to_ptid (tid
)))
1850 add_thread (pid_to_ptid (tid
));
1852 while (*bufp
++ == ','); /* comma-separated list */
1853 putpkt ("qsThreadInfo");
1854 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1861 /* Else fall back to old method based on jmetzler protocol. */
1862 use_threadinfo_query
= 0;
1863 remote_find_new_threads ();
1868 * Collect a descriptive string about the given thread.
1869 * The target may say anything it wants to about the thread
1870 * (typically info about its blocked / runnable state, name, etc.).
1871 * This string will appear in the info threads display.
1873 * Optional: targets are not required to implement this function.
1877 remote_threads_extra_info (struct thread_info
*tp
)
1879 struct remote_state
*rs
= get_remote_state ();
1883 struct gdb_ext_thread_info threadinfo
;
1884 static char display_buf
[100]; /* arbitrary... */
1885 int n
= 0; /* position in display_buf */
1887 if (remote_desc
== 0) /* paranoia */
1888 internal_error (__FILE__
, __LINE__
,
1889 _("remote_threads_extra_info"));
1891 if (use_threadextra_query
)
1893 xsnprintf (rs
->buf
, get_remote_packet_size (), "qThreadExtraInfo,%x",
1896 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1897 if (rs
->buf
[0] != 0)
1899 n
= min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
1900 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
1901 display_buf
[result
] = '\0';
1906 /* If the above query fails, fall back to the old method. */
1907 use_threadextra_query
= 0;
1908 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
1909 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
1910 int_to_threadref (&id
, PIDGET (tp
->ptid
));
1911 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
1912 if (threadinfo
.active
)
1914 if (*threadinfo
.shortname
)
1915 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
1916 " Name: %s,", threadinfo
.shortname
);
1917 if (*threadinfo
.display
)
1918 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
1919 " State: %s,", threadinfo
.display
);
1920 if (*threadinfo
.more_display
)
1921 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
1922 " Priority: %s", threadinfo
.more_display
);
1926 /* For purely cosmetic reasons, clear up trailing commas. */
1927 if (',' == display_buf
[n
-1])
1928 display_buf
[n
-1] = ' ';
1936 /* Restart the remote side; this is an extended protocol operation. */
1939 extended_remote_restart (void)
1941 struct remote_state
*rs
= get_remote_state ();
1943 /* Send the restart command; for reasons I don't understand the
1944 remote side really expects a number after the "R". */
1945 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
1948 remote_fileio_reset ();
1950 /* Now query for status so this looks just like we restarted
1951 gdbserver from scratch. */
1953 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1956 /* Clean up connection to a remote debugger. */
1959 remote_close (int quitting
)
1962 serial_close (remote_desc
);
1966 /* Query the remote side for the text, data and bss offsets. */
1971 struct remote_state
*rs
= get_remote_state ();
1975 CORE_ADDR text_addr
, data_addr
, bss_addr
;
1976 struct section_offsets
*offs
;
1978 putpkt ("qOffsets");
1979 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1982 if (buf
[0] == '\000')
1983 return; /* Return silently. Stub doesn't support
1987 warning (_("Remote failure reply: %s"), buf
);
1991 /* Pick up each field in turn. This used to be done with scanf, but
1992 scanf will make trouble if CORE_ADDR size doesn't match
1993 conversion directives correctly. The following code will work
1994 with any size of CORE_ADDR. */
1995 text_addr
= data_addr
= bss_addr
= 0;
1999 if (strncmp (ptr
, "Text=", 5) == 0)
2002 /* Don't use strtol, could lose on big values. */
2003 while (*ptr
&& *ptr
!= ';')
2004 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2009 if (!lose
&& strncmp (ptr
, ";Data=", 6) == 0)
2012 while (*ptr
&& *ptr
!= ';')
2013 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2018 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
2021 while (*ptr
&& *ptr
!= ';')
2022 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
2028 error (_("Malformed response to offset query, %s"), buf
);
2030 if (symfile_objfile
== NULL
)
2033 offs
= ((struct section_offsets
*)
2034 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
2035 memcpy (offs
, symfile_objfile
->section_offsets
,
2036 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
2038 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
2040 /* This is a temporary kludge to force data and bss to use the same offsets
2041 because that's what nlmconv does now. The real solution requires changes
2042 to the stub and remote.c that I don't have time to do right now. */
2044 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
2045 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
2047 objfile_relocate (symfile_objfile
, offs
);
2050 /* Stub for catch_exception. */
2053 remote_start_remote (struct ui_out
*uiout
, void *from_tty_p
)
2055 int from_tty
= * (int *) from_tty_p
;
2057 immediate_quit
++; /* Allow user to interrupt it. */
2059 /* Ack any packet which the remote side has already sent. */
2060 serial_write (remote_desc
, "+", 1);
2062 /* Let the stub know that we want it to return the thread. */
2065 inferior_ptid
= remote_current_thread (inferior_ptid
);
2067 get_offsets (); /* Get text, data & bss offsets. */
2069 putpkt ("?"); /* Initiate a query from remote machine. */
2072 start_remote (from_tty
); /* Initialize gdb process mechanisms. */
2075 /* Open a connection to a remote debugger.
2076 NAME is the filename used for communication. */
2079 remote_open (char *name
, int from_tty
)
2081 remote_open_1 (name
, from_tty
, &remote_ops
, 0, 0);
2084 /* Just like remote_open, but with asynchronous support. */
2086 remote_async_open (char *name
, int from_tty
)
2088 remote_open_1 (name
, from_tty
, &remote_async_ops
, 0, 1);
2091 /* Open a connection to a remote debugger using the extended
2092 remote gdb protocol. NAME is the filename used for communication. */
2095 extended_remote_open (char *name
, int from_tty
)
2097 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */,
2101 /* Just like extended_remote_open, but with asynchronous support. */
2103 extended_remote_async_open (char *name
, int from_tty
)
2105 remote_open_1 (name
, from_tty
, &extended_async_remote_ops
,
2106 1 /*extended_p */, 1 /* async_p */);
2109 /* Generic code for opening a connection to a remote target. */
2112 init_all_packet_configs (void)
2115 for (i
= 0; i
< PACKET_MAX
; i
++)
2116 update_packet_config (&remote_protocol_packets
[i
]);
2119 /* Symbol look-up. */
2122 remote_check_symbols (struct objfile
*objfile
)
2124 struct remote_state
*rs
= get_remote_state ();
2125 char *msg
, *reply
, *tmp
;
2126 struct minimal_symbol
*sym
;
2129 if (remote_protocol_packets
[PACKET_qSymbol
].support
== PACKET_DISABLE
)
2132 /* Allocate a message buffer. We can't reuse the input buffer in RS,
2133 because we need both at the same time. */
2134 msg
= alloca (get_remote_packet_size ());
2136 /* Invite target to request symbol lookups. */
2138 putpkt ("qSymbol::");
2139 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2140 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSymbol
]);
2143 while (strncmp (reply
, "qSymbol:", 8) == 0)
2146 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
2148 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
2150 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
2152 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
2153 paddr_nz (SYMBOL_VALUE_ADDRESS (sym
)),
2156 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2161 static struct serial
*
2162 remote_serial_open (char *name
)
2164 static int udp_warning
= 0;
2166 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2167 of in ser-tcp.c, because it is the remote protocol assuming that the
2168 serial connection is reliable and not the serial connection promising
2170 if (!udp_warning
&& strncmp (name
, "udp:", 4) == 0)
2173 The remote protocol may be unreliable over UDP.\n\
2174 Some events may be lost, rendering further debugging impossible."));
2178 return serial_open (name
);
2181 /* This type describes each known response to the qSupported
2183 struct protocol_feature
2185 /* The name of this protocol feature. */
2188 /* The default for this protocol feature. */
2189 enum packet_support default_support
;
2191 /* The function to call when this feature is reported, or after
2192 qSupported processing if the feature is not supported.
2193 The first argument points to this structure. The second
2194 argument indicates whether the packet requested support be
2195 enabled, disabled, or probed (or the default, if this function
2196 is being called at the end of processing and this feature was
2197 not reported). The third argument may be NULL; if not NULL, it
2198 is a NUL-terminated string taken from the packet following
2199 this feature's name and an equals sign. */
2200 void (*func
) (const struct protocol_feature
*, enum packet_support
,
2203 /* The corresponding packet for this feature. Only used if
2204 FUNC is remote_supported_packet. */
2209 remote_supported_packet (const struct protocol_feature
*feature
,
2210 enum packet_support support
,
2211 const char *argument
)
2215 warning (_("Remote qSupported response supplied an unexpected value for"
2216 " \"%s\"."), feature
->name
);
2220 if (remote_protocol_packets
[feature
->packet
].support
2221 == PACKET_SUPPORT_UNKNOWN
)
2222 remote_protocol_packets
[feature
->packet
].support
= support
;
2226 remote_packet_size (const struct protocol_feature
*feature
,
2227 enum packet_support support
, const char *value
)
2229 struct remote_state
*rs
= get_remote_state ();
2234 if (support
!= PACKET_ENABLE
)
2237 if (value
== NULL
|| *value
== '\0')
2239 warning (_("Remote target reported \"%s\" without a size."),
2245 packet_size
= strtol (value
, &value_end
, 16);
2246 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
2248 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
2249 feature
->name
, value
);
2253 if (packet_size
> MAX_REMOTE_PACKET_SIZE
)
2255 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
2256 packet_size
, MAX_REMOTE_PACKET_SIZE
);
2257 packet_size
= MAX_REMOTE_PACKET_SIZE
;
2260 /* Record the new maximum packet size. */
2261 rs
->explicit_packet_size
= packet_size
;
2264 static struct protocol_feature remote_protocol_features
[] = {
2265 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
2266 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
2267 PACKET_qXfer_auxv
},
2268 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
2269 PACKET_qXfer_memory_map
},
2270 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
2271 PACKET_QPassSignals
},
2275 remote_query_supported (void)
2277 struct remote_state
*rs
= get_remote_state ();
2280 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
2282 /* The packet support flags are handled differently for this packet
2283 than for most others. We treat an error, a disabled packet, and
2284 an empty response identically: any features which must be reported
2285 to be used will be automatically disabled. An empty buffer
2286 accomplishes this, since that is also the representation for a list
2287 containing no features. */
2290 if (remote_protocol_packets
[PACKET_qSupported
].support
!= PACKET_DISABLE
)
2292 putpkt ("qSupported");
2293 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2295 /* If an error occured, warn, but do not return - just reset the
2296 buffer to empty and go on to disable features. */
2297 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
2300 warning (_("Remote failure reply: %s"), rs
->buf
);
2305 memset (seen
, 0, sizeof (seen
));
2310 enum packet_support is_supported
;
2311 char *p
, *end
, *name_end
, *value
;
2313 /* First separate out this item from the rest of the packet. If
2314 there's another item after this, we overwrite the separator
2315 (terminated strings are much easier to work with). */
2317 end
= strchr (p
, ';');
2320 end
= p
+ strlen (p
);
2330 warning (_("empty item in \"qSupported\" response"));
2335 name_end
= strchr (p
, '=');
2338 /* This is a name=value entry. */
2339 is_supported
= PACKET_ENABLE
;
2340 value
= name_end
+ 1;
2349 is_supported
= PACKET_ENABLE
;
2353 is_supported
= PACKET_DISABLE
;
2357 is_supported
= PACKET_SUPPORT_UNKNOWN
;
2361 warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p
);
2367 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
2368 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
2370 const struct protocol_feature
*feature
;
2373 feature
= &remote_protocol_features
[i
];
2374 feature
->func (feature
, is_supported
, value
);
2379 /* If we increased the packet size, make sure to increase the global
2380 buffer size also. We delay this until after parsing the entire
2381 qSupported packet, because this is the same buffer we were
2383 if (rs
->buf_size
< rs
->explicit_packet_size
)
2385 rs
->buf_size
= rs
->explicit_packet_size
;
2386 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
2389 /* Handle the defaults for unmentioned features. */
2390 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
2393 const struct protocol_feature
*feature
;
2395 feature
= &remote_protocol_features
[i
];
2396 feature
->func (feature
, feature
->default_support
, NULL
);
2402 remote_open_1 (char *name
, int from_tty
, struct target_ops
*target
,
2403 int extended_p
, int async_p
)
2405 struct remote_state
*rs
= get_remote_state ();
2407 error (_("To open a remote debug connection, you need to specify what\n"
2408 "serial device is attached to the remote system\n"
2409 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
2411 /* See FIXME above. */
2413 wait_forever_enabled_p
= 1;
2415 target_preopen (from_tty
);
2417 unpush_target (target
);
2419 /* Make sure we send the passed signals list the next time we resume. */
2420 xfree (last_pass_packet
);
2421 last_pass_packet
= NULL
;
2423 remote_fileio_reset ();
2424 reopen_exec_file ();
2427 remote_desc
= remote_serial_open (name
);
2429 perror_with_name (name
);
2431 if (baud_rate
!= -1)
2433 if (serial_setbaudrate (remote_desc
, baud_rate
))
2435 /* The requested speed could not be set. Error out to
2436 top level after closing remote_desc. Take care to
2437 set remote_desc to NULL to avoid closing remote_desc
2439 serial_close (remote_desc
);
2441 perror_with_name (name
);
2445 serial_raw (remote_desc
);
2447 /* If there is something sitting in the buffer we might take it as a
2448 response to a command, which would be bad. */
2449 serial_flush_input (remote_desc
);
2453 puts_filtered ("Remote debugging using ");
2454 puts_filtered (name
);
2455 puts_filtered ("\n");
2457 push_target (target
); /* Switch to using remote target now. */
2459 /* Reset the target state; these things will be queried either by
2460 remote_query_supported or as they are needed. */
2461 init_all_packet_configs ();
2462 rs
->explicit_packet_size
= 0;
2464 general_thread
= -2;
2465 continue_thread
= -2;
2467 /* Probe for ability to use "ThreadInfo" query, as required. */
2468 use_threadinfo_query
= 1;
2469 use_threadextra_query
= 1;
2471 /* The first packet we send to the target is the optional "supported
2472 packets" request. If the target can answer this, it will tell us
2473 which later probes to skip. */
2474 remote_query_supported ();
2476 /* Without this, some commands which require an active target (such
2477 as kill) won't work. This variable serves (at least) double duty
2478 as both the pid of the target process (if it has such), and as a
2479 flag indicating that a target is active. These functions should
2480 be split out into seperate variables, especially since GDB will
2481 someday have a notion of debugging several processes. */
2483 inferior_ptid
= pid_to_ptid (MAGIC_NULL_PID
);
2487 /* With this target we start out by owning the terminal. */
2488 remote_async_terminal_ours_p
= 1;
2490 /* FIXME: cagney/1999-09-23: During the initial connection it is
2491 assumed that the target is already ready and able to respond to
2492 requests. Unfortunately remote_start_remote() eventually calls
2493 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2494 around this. Eventually a mechanism that allows
2495 wait_for_inferior() to expect/get timeouts will be
2497 wait_forever_enabled_p
= 0;
2500 /* First delete any symbols previously loaded from shared libraries. */
2501 no_shared_libraries (NULL
, 0);
2503 /* Start the remote connection. If error() or QUIT, discard this
2504 target (we'd otherwise be in an inconsistent state) and then
2505 propogate the error on up the exception chain. This ensures that
2506 the caller doesn't stumble along blindly assuming that the
2507 function succeeded. The CLI doesn't have this problem but other
2508 UI's, such as MI do.
2510 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
2511 this function should return an error indication letting the
2512 caller restore the previous state. Unfortunately the command
2513 ``target remote'' is directly wired to this function making that
2514 impossible. On a positive note, the CLI side of this problem has
2515 been fixed - the function set_cmd_context() makes it possible for
2516 all the ``target ....'' commands to share a common callback
2517 function. See cli-dump.c. */
2519 struct gdb_exception ex
2520 = catch_exception (uiout
, remote_start_remote
, &from_tty
,
2526 wait_forever_enabled_p
= 1;
2527 throw_exception (ex
);
2532 wait_forever_enabled_p
= 1;
2536 /* Tell the remote that we are using the extended protocol. */
2538 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2541 if (exec_bfd
) /* No use without an exec file. */
2542 remote_check_symbols (symfile_objfile
);
2545 /* This takes a program previously attached to and detaches it. After
2546 this is done, GDB can be used to debug some other program. We
2547 better not have left any breakpoints in the target program or it'll
2548 die when it hits one. */
2551 remote_detach (char *args
, int from_tty
)
2553 struct remote_state
*rs
= get_remote_state ();
2556 error (_("Argument given to \"detach\" when remotely debugging."));
2558 /* Tell the remote target to detach. */
2559 strcpy (rs
->buf
, "D");
2560 remote_send (&rs
->buf
, &rs
->buf_size
);
2562 /* Unregister the file descriptor from the event loop. */
2563 if (target_is_async_p ())
2564 serial_async (remote_desc
, NULL
, 0);
2566 target_mourn_inferior ();
2568 puts_filtered ("Ending remote debugging.\n");
2571 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
2574 remote_disconnect (struct target_ops
*target
, char *args
, int from_tty
)
2577 error (_("Argument given to \"detach\" when remotely debugging."));
2579 /* Unregister the file descriptor from the event loop. */
2580 if (target_is_async_p ())
2581 serial_async (remote_desc
, NULL
, 0);
2583 target_mourn_inferior ();
2585 puts_filtered ("Ending remote debugging.\n");
2588 /* Convert hex digit A to a number. */
2593 if (a
>= '0' && a
<= '9')
2595 else if (a
>= 'a' && a
<= 'f')
2596 return a
- 'a' + 10;
2597 else if (a
>= 'A' && a
<= 'F')
2598 return a
- 'A' + 10;
2600 error (_("Reply contains invalid hex digit %d"), a
);
2604 hex2bin (const char *hex
, gdb_byte
*bin
, int count
)
2608 for (i
= 0; i
< count
; i
++)
2610 if (hex
[0] == 0 || hex
[1] == 0)
2612 /* Hex string is short, or of uneven length.
2613 Return the count that has been converted so far. */
2616 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
2622 /* Convert number NIB to a hex digit. */
2630 return 'a' + nib
- 10;
2634 bin2hex (const gdb_byte
*bin
, char *hex
, int count
)
2637 /* May use a length, or a nul-terminated string as input. */
2639 count
= strlen ((char *) bin
);
2641 for (i
= 0; i
< count
; i
++)
2643 *hex
++ = tohex ((*bin
>> 4) & 0xf);
2644 *hex
++ = tohex (*bin
++ & 0xf);
2650 /* Check for the availability of vCont. This function should also check
2654 remote_vcont_probe (struct remote_state
*rs
)
2658 strcpy (rs
->buf
, "vCont?");
2660 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2663 /* Make sure that the features we assume are supported. */
2664 if (strncmp (buf
, "vCont", 5) == 0)
2667 int support_s
, support_S
, support_c
, support_C
;
2673 while (p
&& *p
== ';')
2676 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2678 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2680 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2682 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2685 p
= strchr (p
, ';');
2688 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
2689 BUF will make packet_ok disable the packet. */
2690 if (!support_s
|| !support_S
|| !support_c
|| !support_C
)
2694 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
2697 /* Resume the remote inferior by using a "vCont" packet. The thread
2698 to be resumed is PTID; STEP and SIGGNAL indicate whether the
2699 resumed thread should be single-stepped and/or signalled. If PTID's
2700 PID is -1, then all threads are resumed; the thread to be stepped and/or
2701 signalled is given in the global INFERIOR_PTID. This function returns
2702 non-zero iff it resumes the inferior.
2704 This function issues a strict subset of all possible vCont commands at the
2708 remote_vcont_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2710 struct remote_state
*rs
= get_remote_state ();
2711 int pid
= PIDGET (ptid
);
2712 char *buf
= NULL
, *outbuf
;
2713 struct cleanup
*old_cleanup
;
2715 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
2716 remote_vcont_probe (rs
);
2718 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_DISABLE
)
2721 /* If we could generate a wider range of packets, we'd have to worry
2722 about overflowing BUF. Should there be a generic
2723 "multi-part-packet" packet? */
2725 if (PIDGET (inferior_ptid
) == MAGIC_NULL_PID
)
2727 /* MAGIC_NULL_PTID means that we don't have any active threads, so we
2728 don't have any PID numbers the inferior will understand. Make sure
2729 to only send forms that do not specify a PID. */
2730 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2731 outbuf
= xstrprintf ("vCont;S%02x", siggnal
);
2733 outbuf
= xstrprintf ("vCont;s");
2734 else if (siggnal
!= TARGET_SIGNAL_0
)
2735 outbuf
= xstrprintf ("vCont;C%02x", siggnal
);
2737 outbuf
= xstrprintf ("vCont;c");
2741 /* Resume all threads, with preference for INFERIOR_PTID. */
2742 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2743 outbuf
= xstrprintf ("vCont;S%02x:%x;c", siggnal
,
2744 PIDGET (inferior_ptid
));
2746 outbuf
= xstrprintf ("vCont;s:%x;c", PIDGET (inferior_ptid
));
2747 else if (siggnal
!= TARGET_SIGNAL_0
)
2748 outbuf
= xstrprintf ("vCont;C%02x:%x;c", siggnal
,
2749 PIDGET (inferior_ptid
));
2751 outbuf
= xstrprintf ("vCont;c");
2755 /* Scheduler locking; resume only PTID. */
2756 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2757 outbuf
= xstrprintf ("vCont;S%02x:%x", siggnal
, pid
);
2759 outbuf
= xstrprintf ("vCont;s:%x", pid
);
2760 else if (siggnal
!= TARGET_SIGNAL_0
)
2761 outbuf
= xstrprintf ("vCont;C%02x:%x", siggnal
, pid
);
2763 outbuf
= xstrprintf ("vCont;c:%x", pid
);
2766 gdb_assert (outbuf
&& strlen (outbuf
) < get_remote_packet_size ());
2767 old_cleanup
= make_cleanup (xfree
, outbuf
);
2771 do_cleanups (old_cleanup
);
2776 /* Tell the remote machine to resume. */
2778 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
2780 static int last_sent_step
;
2783 remote_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2785 struct remote_state
*rs
= get_remote_state ();
2787 int pid
= PIDGET (ptid
);
2789 last_sent_signal
= siggnal
;
2790 last_sent_step
= step
;
2792 /* A hook for when we need to do something at the last moment before
2794 if (deprecated_target_resume_hook
)
2795 (*deprecated_target_resume_hook
) ();
2797 /* Update the inferior on signals to silently pass, if they've changed. */
2798 remote_pass_signals ();
2800 /* The vCont packet doesn't need to specify threads via Hc. */
2801 if (remote_vcont_resume (ptid
, step
, siggnal
))
2804 /* All other supported resume packets do use Hc, so call set_thread. */
2806 set_thread (0, 0); /* Run any thread. */
2808 set_thread (pid
, 0); /* Run this thread. */
2811 if (siggnal
!= TARGET_SIGNAL_0
)
2813 buf
[0] = step
? 'S' : 'C';
2814 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
2815 buf
[2] = tohex (((int) siggnal
) & 0xf);
2819 strcpy (buf
, step
? "s" : "c");
2824 /* Same as remote_resume, but with async support. */
2826 remote_async_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2828 remote_resume (ptid
, step
, siggnal
);
2830 /* We are about to start executing the inferior, let's register it
2831 with the event loop. NOTE: this is the one place where all the
2832 execution commands end up. We could alternatively do this in each
2833 of the execution commands in infcmd.c. */
2834 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
2835 into infcmd.c in order to allow inferior function calls to work
2836 NOT asynchronously. */
2837 if (target_can_async_p ())
2838 target_async (inferior_event_handler
, 0);
2839 /* Tell the world that the target is now executing. */
2840 /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set
2841 this? Instead, should the client of target just assume (for
2842 async targets) that the target is going to start executing? Is
2843 this information already found in the continuation block? */
2844 if (target_is_async_p ())
2845 target_executing
= 1;
2849 /* Set up the signal handler for SIGINT, while the target is
2850 executing, ovewriting the 'regular' SIGINT signal handler. */
2852 initialize_sigint_signal_handler (void)
2854 sigint_remote_token
=
2855 create_async_signal_handler (async_remote_interrupt
, NULL
);
2856 signal (SIGINT
, handle_remote_sigint
);
2859 /* Signal handler for SIGINT, while the target is executing. */
2861 handle_remote_sigint (int sig
)
2863 signal (sig
, handle_remote_sigint_twice
);
2864 sigint_remote_twice_token
=
2865 create_async_signal_handler (async_remote_interrupt_twice
, NULL
);
2866 mark_async_signal_handler_wrapper (sigint_remote_token
);
2869 /* Signal handler for SIGINT, installed after SIGINT has already been
2870 sent once. It will take effect the second time that the user sends
2873 handle_remote_sigint_twice (int sig
)
2875 signal (sig
, handle_sigint
);
2876 sigint_remote_twice_token
=
2877 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
2878 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
2881 /* Perform the real interruption of the target execution, in response
2884 async_remote_interrupt (gdb_client_data arg
)
2887 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2892 /* Perform interrupt, if the first attempt did not succeed. Just give
2893 up on the target alltogether. */
2895 async_remote_interrupt_twice (gdb_client_data arg
)
2898 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
2899 /* Do something only if the target was not killed by the previous
2901 if (target_executing
)
2904 signal (SIGINT
, handle_remote_sigint
);
2908 /* Reinstall the usual SIGINT handlers, after the target has
2911 cleanup_sigint_signal_handler (void *dummy
)
2913 signal (SIGINT
, handle_sigint
);
2914 if (sigint_remote_twice_token
)
2915 delete_async_signal_handler ((struct async_signal_handler
**)
2916 &sigint_remote_twice_token
);
2917 if (sigint_remote_token
)
2918 delete_async_signal_handler ((struct async_signal_handler
**)
2919 &sigint_remote_token
);
2922 /* Send ^C to target to halt it. Target will respond, and send us a
2924 static void (*ofunc
) (int);
2926 /* The command line interface's stop routine. This function is installed
2927 as a signal handler for SIGINT. The first time a user requests a
2928 stop, we call remote_stop to send a break or ^C. If there is no
2929 response from the target (it didn't stop when the user requested it),
2930 we ask the user if he'd like to detach from the target. */
2932 remote_interrupt (int signo
)
2934 /* If this doesn't work, try more severe steps. */
2935 signal (signo
, remote_interrupt_twice
);
2938 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2943 /* The user typed ^C twice. */
2946 remote_interrupt_twice (int signo
)
2948 signal (signo
, ofunc
);
2950 signal (signo
, remote_interrupt
);
2953 /* This is the generic stop called via the target vector. When a target
2954 interrupt is requested, either by the command line or the GUI, we
2955 will eventually end up here. */
2959 /* Send a break or a ^C, depending on user preference. */
2961 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
2964 serial_send_break (remote_desc
);
2966 serial_write (remote_desc
, "\003", 1);
2969 /* Ask the user what to do when an interrupt is received. */
2972 interrupt_query (void)
2974 target_terminal_ours ();
2976 if (query ("Interrupted while waiting for the program.\n\
2977 Give up (and stop debugging it)? "))
2979 target_mourn_inferior ();
2980 deprecated_throw_reason (RETURN_QUIT
);
2983 target_terminal_inferior ();
2986 /* Enable/disable target terminal ownership. Most targets can use
2987 terminal groups to control terminal ownership. Remote targets are
2988 different in that explicit transfer of ownership to/from GDB/target
2992 remote_async_terminal_inferior (void)
2994 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
2995 sync_execution here. This function should only be called when
2996 GDB is resuming the inferior in the forground. A background
2997 resume (``run&'') should leave GDB in control of the terminal and
2998 consequently should not call this code. */
2999 if (!sync_execution
)
3001 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
3002 calls target_terminal_*() idenpotent. The event-loop GDB talking
3003 to an asynchronous target with a synchronous command calls this
3004 function from both event-top.c and infrun.c/infcmd.c. Once GDB
3005 stops trying to transfer the terminal to the target when it
3006 shouldn't this guard can go away. */
3007 if (!remote_async_terminal_ours_p
)
3009 delete_file_handler (input_fd
);
3010 remote_async_terminal_ours_p
= 0;
3011 initialize_sigint_signal_handler ();
3012 /* NOTE: At this point we could also register our selves as the
3013 recipient of all input. Any characters typed could then be
3014 passed on down to the target. */
3018 remote_async_terminal_ours (void)
3020 /* See FIXME in remote_async_terminal_inferior. */
3021 if (!sync_execution
)
3023 /* See FIXME in remote_async_terminal_inferior. */
3024 if (remote_async_terminal_ours_p
)
3026 cleanup_sigint_signal_handler (NULL
);
3027 add_file_handler (input_fd
, stdin_event_handler
, 0);
3028 remote_async_terminal_ours_p
= 1;
3031 /* If nonzero, ignore the next kill. */
3036 remote_console_output (char *msg
)
3040 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
3043 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
3046 fputs_unfiltered (tb
, gdb_stdtarg
);
3048 gdb_flush (gdb_stdtarg
);
3051 /* Wait until the remote machine stops, then return,
3052 storing status in STATUS just as `wait' would.
3053 Returns "pid", which in the case of a multi-threaded
3054 remote OS, is the thread-id. */
3057 remote_wait (ptid_t ptid
, struct target_waitstatus
*status
)
3059 struct remote_state
*rs
= get_remote_state ();
3060 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3061 ULONGEST thread_num
= -1;
3064 status
->kind
= TARGET_WAITKIND_EXITED
;
3065 status
->value
.integer
= 0;
3071 ofunc
= signal (SIGINT
, remote_interrupt
);
3072 getpkt (&rs
->buf
, &rs
->buf_size
, 1);
3073 signal (SIGINT
, ofunc
);
3077 /* This is a hook for when we need to do something (perhaps the
3078 collection of trace data) every time the target stops. */
3079 if (deprecated_target_wait_loop_hook
)
3080 (*deprecated_target_wait_loop_hook
) ();
3082 remote_stopped_by_watchpoint_p
= 0;
3086 case 'E': /* Error of some sort. */
3087 warning (_("Remote failure reply: %s"), buf
);
3089 case 'F': /* File-I/O request. */
3090 remote_fileio_request (buf
);
3092 case 'T': /* Status with PC, SP, FP, ... */
3094 gdb_byte regs
[MAX_REGISTER_SIZE
];
3096 /* Expedited reply, containing Signal, {regno, reg} repeat. */
3097 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3099 n... = register number
3100 r... = register contents
3102 p
= &buf
[3]; /* after Txx */
3111 /* If the packet contains a register number save it in
3112 pnum and set p1 to point to the character following
3113 it. Otherwise p1 points to p. */
3115 /* If this packet is an awatch packet, don't parse the
3116 'a' as a register number. */
3118 if (strncmp (p
, "awatch", strlen("awatch")) != 0)
3120 /* Read the ``P'' register number. */
3121 pnum
= strtol (p
, &p_temp
, 16);
3127 if (p1
== p
) /* No register number present here. */
3129 p1
= strchr (p
, ':');
3131 error (_("Malformed packet(a) (missing colon): %s\n\
3134 if (strncmp (p
, "thread", p1
- p
) == 0)
3136 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
3137 record_currthread (thread_num
);
3140 else if ((strncmp (p
, "watch", p1
- p
) == 0)
3141 || (strncmp (p
, "rwatch", p1
- p
) == 0)
3142 || (strncmp (p
, "awatch", p1
- p
) == 0))
3144 remote_stopped_by_watchpoint_p
= 1;
3145 p
= unpack_varlen_hex (++p1
, &addr
);
3146 remote_watch_data_address
= (CORE_ADDR
)addr
;
3150 /* Silently skip unknown optional info. */
3151 p_temp
= strchr (p1
+ 1, ';');
3158 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
3162 error (_("Malformed packet(b) (missing colon): %s\n\
3167 error (_("Remote sent bad register number %s: %s\n\
3169 phex_nz (pnum
, 0), p
, buf
);
3171 fieldsize
= hex2bin (p
, regs
,
3172 register_size (current_gdbarch
,
3175 if (fieldsize
< register_size (current_gdbarch
,
3177 warning (_("Remote reply is too short: %s"), buf
);
3178 regcache_raw_supply (current_regcache
,
3183 error (_("Remote register badly formatted: %s\nhere: %s"),
3188 case 'S': /* Old style status, just signal only. */
3189 status
->kind
= TARGET_WAITKIND_STOPPED
;
3190 status
->value
.sig
= (enum target_signal
)
3191 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3195 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
3196 record_currthread (thread_num
);
3199 case 'W': /* Target exited. */
3201 /* The remote process exited. */
3202 status
->kind
= TARGET_WAITKIND_EXITED
;
3203 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
3207 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
3208 status
->value
.sig
= (enum target_signal
)
3209 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3213 case 'O': /* Console output. */
3214 remote_console_output (buf
+ 1);
3217 if (last_sent_signal
!= TARGET_SIGNAL_0
)
3219 /* Zero length reply means that we tried 'S' or 'C' and
3220 the remote system doesn't support it. */
3221 target_terminal_ours_for_output ();
3223 ("Can't send signals to this remote system. %s not sent.\n",
3224 target_signal_to_name (last_sent_signal
));
3225 last_sent_signal
= TARGET_SIGNAL_0
;
3226 target_terminal_inferior ();
3228 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
3229 putpkt ((char *) buf
);
3232 /* else fallthrough */
3234 warning (_("Invalid remote reply: %s"), buf
);
3239 if (thread_num
!= -1)
3241 return pid_to_ptid (thread_num
);
3243 return inferior_ptid
;
3246 /* Async version of remote_wait. */
3248 remote_async_wait (ptid_t ptid
, struct target_waitstatus
*status
)
3250 struct remote_state
*rs
= get_remote_state ();
3251 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3252 ULONGEST thread_num
= -1;
3255 status
->kind
= TARGET_WAITKIND_EXITED
;
3256 status
->value
.integer
= 0;
3258 remote_stopped_by_watchpoint_p
= 0;
3264 if (!target_is_async_p ())
3265 ofunc
= signal (SIGINT
, remote_interrupt
);
3266 /* FIXME: cagney/1999-09-27: If we're in async mode we should
3267 _never_ wait for ever -> test on target_is_async_p().
3268 However, before we do that we need to ensure that the caller
3269 knows how to take the target into/out of async mode. */
3270 getpkt (&rs
->buf
, &rs
->buf_size
, wait_forever_enabled_p
);
3271 if (!target_is_async_p ())
3272 signal (SIGINT
, ofunc
);
3276 /* This is a hook for when we need to do something (perhaps the
3277 collection of trace data) every time the target stops. */
3278 if (deprecated_target_wait_loop_hook
)
3279 (*deprecated_target_wait_loop_hook
) ();
3283 case 'E': /* Error of some sort. */
3284 warning (_("Remote failure reply: %s"), buf
);
3286 case 'F': /* File-I/O request. */
3287 remote_fileio_request (buf
);
3289 case 'T': /* Status with PC, SP, FP, ... */
3291 gdb_byte regs
[MAX_REGISTER_SIZE
];
3293 /* Expedited reply, containing Signal, {regno, reg} repeat. */
3294 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3296 n... = register number
3297 r... = register contents
3299 p
= &buf
[3]; /* after Txx */
3308 /* If the packet contains a register number, save it
3309 in pnum and set p1 to point to the character
3310 following it. Otherwise p1 points to p. */
3312 /* If this packet is an awatch packet, don't parse the 'a'
3313 as a register number. */
3315 if (!strncmp (p
, "awatch", strlen ("awatch")) != 0)
3317 /* Read the register number. */
3318 pnum
= strtol (p
, &p_temp
, 16);
3324 if (p1
== p
) /* No register number present here. */
3326 p1
= strchr (p
, ':');
3328 error (_("Malformed packet(a) (missing colon): %s\n\
3331 if (strncmp (p
, "thread", p1
- p
) == 0)
3333 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
3334 record_currthread (thread_num
);
3337 else if ((strncmp (p
, "watch", p1
- p
) == 0)
3338 || (strncmp (p
, "rwatch", p1
- p
) == 0)
3339 || (strncmp (p
, "awatch", p1
- p
) == 0))
3341 remote_stopped_by_watchpoint_p
= 1;
3342 p
= unpack_varlen_hex (++p1
, &addr
);
3343 remote_watch_data_address
= (CORE_ADDR
)addr
;
3347 /* Silently skip unknown optional info. */
3348 p_temp
= strchr (p1
+ 1, ';');
3356 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
3359 error (_("Malformed packet(b) (missing colon): %s\n\
3364 error (_("Remote sent bad register number %ld: %s\n\
3368 fieldsize
= hex2bin (p
, regs
,
3369 register_size (current_gdbarch
,
3372 if (fieldsize
< register_size (current_gdbarch
,
3374 warning (_("Remote reply is too short: %s"), buf
);
3375 regcache_raw_supply (current_regcache
, reg
->regnum
, regs
);
3379 error (_("Remote register badly formatted: %s\nhere: %s"),
3384 case 'S': /* Old style status, just signal only. */
3385 status
->kind
= TARGET_WAITKIND_STOPPED
;
3386 status
->value
.sig
= (enum target_signal
)
3387 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3391 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
3392 record_currthread (thread_num
);
3395 case 'W': /* Target exited. */
3397 /* The remote process exited. */
3398 status
->kind
= TARGET_WAITKIND_EXITED
;
3399 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
3403 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
3404 status
->value
.sig
= (enum target_signal
)
3405 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3409 case 'O': /* Console output. */
3410 remote_console_output (buf
+ 1);
3411 /* Return immediately to the event loop. The event loop will
3412 still be waiting on the inferior afterwards. */
3413 status
->kind
= TARGET_WAITKIND_IGNORE
;
3416 if (last_sent_signal
!= TARGET_SIGNAL_0
)
3418 /* Zero length reply means that we tried 'S' or 'C' and
3419 the remote system doesn't support it. */
3420 target_terminal_ours_for_output ();
3422 ("Can't send signals to this remote system. %s not sent.\n",
3423 target_signal_to_name (last_sent_signal
));
3424 last_sent_signal
= TARGET_SIGNAL_0
;
3425 target_terminal_inferior ();
3427 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
3428 putpkt ((char *) buf
);
3431 /* else fallthrough */
3433 warning (_("Invalid remote reply: %s"), buf
);
3438 if (thread_num
!= -1)
3440 return pid_to_ptid (thread_num
);
3442 return inferior_ptid
;
3445 /* Number of bytes of registers this stub implements. */
3447 static int register_bytes_found
;
3449 /* Read the remote registers into the block REGS. */
3450 /* Currently we just read all the registers, so we don't use regnum. */
3453 fetch_register_using_p (int regnum
)
3455 struct remote_state
*rs
= get_remote_state ();
3457 char regp
[MAX_REGISTER_SIZE
];
3462 p
+= hexnumstr (p
, regnum
);
3464 remote_send (&rs
->buf
, &rs
->buf_size
);
3468 /* If the stub didn't recognize the packet, or if we got an error,
3470 if (buf
[0] == '\0' || buf
[0] == 'E')
3473 /* If this register is unfetchable, tell the regcache. */
3476 regcache_raw_supply (current_regcache
, regnum
, NULL
);
3477 set_register_cached (regnum
, -1);
3481 /* Otherwise, parse and supply the value. */
3488 error (_("fetch_register_using_p: early buf termination"));
3492 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3495 regcache_raw_supply (current_regcache
, regnum
, regp
);
3500 remote_fetch_registers (int regnum
)
3502 struct remote_state
*rs
= get_remote_state ();
3503 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3507 char *regs
= alloca (rsa
->sizeof_g_packet
);
3509 set_thread (PIDGET (inferior_ptid
), 1);
3513 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
3514 gdb_assert (reg
!= NULL
);
3515 if (!reg
->in_g_packet
)
3516 internal_error (__FILE__
, __LINE__
,
3517 _("Attempt to fetch a non G-packet register when this "
3518 "remote.c does not support the p-packet."));
3520 switch (remote_protocol_packets
[PACKET_p
].support
)
3522 case PACKET_DISABLE
:
3525 if (fetch_register_using_p (regnum
))
3528 error (_("Protocol error: p packet not recognized by stub"));
3529 case PACKET_SUPPORT_UNKNOWN
:
3530 if (fetch_register_using_p (regnum
))
3532 /* The stub recognized the 'p' packet. Remember this. */
3533 remote_protocol_packets
[PACKET_p
].support
= PACKET_ENABLE
;
3538 /* The stub does not support the 'P' packet. Use 'G'
3539 instead, and don't try using 'P' in the future (it
3540 will just waste our time). */
3541 remote_protocol_packets
[PACKET_p
].support
= PACKET_DISABLE
;
3546 sprintf (rs
->buf
, "g");
3547 remote_send (&rs
->buf
, &rs
->buf_size
);
3550 /* Save the size of the packet sent to us by the target. Its used
3551 as a heuristic when determining the max size of packets that the
3552 target can safely receive. */
3553 if ((rsa
->actual_register_packet_size
) == 0)
3554 (rsa
->actual_register_packet_size
) = strlen (buf
);
3556 /* Unimplemented registers read as all bits zero. */
3557 memset (regs
, 0, rsa
->sizeof_g_packet
);
3559 /* We can get out of synch in various cases. If the first character
3560 in the buffer is not a hex character, assume that has happened
3561 and try to fetch another packet to read. */
3562 while ((buf
[0] < '0' || buf
[0] > '9')
3563 && (buf
[0] < 'A' || buf
[0] > 'F')
3564 && (buf
[0] < 'a' || buf
[0] > 'f')
3565 && buf
[0] != 'x') /* New: unavailable register value. */
3568 fprintf_unfiltered (gdb_stdlog
,
3569 "Bad register packet; fetching a new packet\n");
3570 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3574 /* Reply describes registers byte by byte, each byte encoded as two
3575 hex characters. Suck them all up, then supply them to the
3576 register cacheing/storage mechanism. */
3579 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
3585 warning (_("Remote reply is of odd length: %s"), buf
);
3586 /* Don't change register_bytes_found in this case, and don't
3587 print a second warning. */
3590 if (p
[0] == 'x' && p
[1] == 'x')
3591 regs
[i
] = 0; /* 'x' */
3593 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3597 if (i
!= register_bytes_found
)
3599 register_bytes_found
= i
;
3600 if (REGISTER_BYTES_OK_P ()
3601 && !REGISTER_BYTES_OK (i
))
3602 warning (_("Remote reply is wrong length: %s"), buf
);
3608 for (i
= 0; i
< NUM_REGS
+ NUM_PSEUDO_REGS
; i
++)
3610 struct packet_reg
*r
= &rsa
->regs
[i
];
3613 if (r
->offset
* 2 >= strlen (buf
))
3614 /* A short packet that didn't include the register's
3615 value, this implies that the register is zero (and
3616 not that the register is unavailable). Supply that
3618 regcache_raw_supply (current_regcache
, r
->regnum
, NULL
);
3619 else if (buf
[r
->offset
* 2] == 'x')
3621 gdb_assert (r
->offset
* 2 < strlen (buf
));
3622 /* The register isn't available, mark it as such (at
3623 the same time setting the value to zero). */
3624 regcache_raw_supply (current_regcache
, r
->regnum
, NULL
);
3625 set_register_cached (i
, -1);
3628 regcache_raw_supply (current_regcache
, r
->regnum
,
3635 /* Prepare to store registers. Since we may send them all (using a
3636 'G' request), we have to read out the ones we don't want to change
3640 remote_prepare_to_store (void)
3642 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3644 gdb_byte buf
[MAX_REGISTER_SIZE
];
3646 /* Make sure the entire registers array is valid. */
3647 switch (remote_protocol_packets
[PACKET_P
].support
)
3649 case PACKET_DISABLE
:
3650 case PACKET_SUPPORT_UNKNOWN
:
3651 /* Make sure all the necessary registers are cached. */
3652 for (i
= 0; i
< NUM_REGS
; i
++)
3653 if (rsa
->regs
[i
].in_g_packet
)
3654 regcache_raw_read (current_regcache
, rsa
->regs
[i
].regnum
, buf
);
3661 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
3662 packet was not recognized. */
3665 store_register_using_P (int regnum
)
3667 struct remote_state
*rs
= get_remote_state ();
3668 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3669 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
3670 /* Try storing a single register. */
3671 char *buf
= rs
->buf
;
3672 gdb_byte regp
[MAX_REGISTER_SIZE
];
3675 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
3676 p
= buf
+ strlen (buf
);
3677 regcache_raw_collect (current_regcache
, reg
->regnum
, regp
);
3678 bin2hex (regp
, p
, register_size (current_gdbarch
, reg
->regnum
));
3679 remote_send (&rs
->buf
, &rs
->buf_size
);
3681 return rs
->buf
[0] != '\0';
3685 /* Store register REGNUM, or all registers if REGNUM == -1, from the
3686 contents of the register cache buffer. FIXME: ignores errors. */
3689 remote_store_registers (int regnum
)
3691 struct remote_state
*rs
= get_remote_state ();
3692 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3696 set_thread (PIDGET (inferior_ptid
), 1);
3700 switch (remote_protocol_packets
[PACKET_P
].support
)
3702 case PACKET_DISABLE
:
3705 if (store_register_using_P (regnum
))
3708 error (_("Protocol error: P packet not recognized by stub"));
3709 case PACKET_SUPPORT_UNKNOWN
:
3710 if (store_register_using_P (regnum
))
3712 /* The stub recognized the 'P' packet. Remember this. */
3713 remote_protocol_packets
[PACKET_P
].support
= PACKET_ENABLE
;
3718 /* The stub does not support the 'P' packet. Use 'G'
3719 instead, and don't try using 'P' in the future (it
3720 will just waste our time). */
3721 remote_protocol_packets
[PACKET_P
].support
= PACKET_DISABLE
;
3727 /* Extract all the registers in the regcache copying them into a
3731 regs
= alloca (rsa
->sizeof_g_packet
);
3732 memset (regs
, 0, rsa
->sizeof_g_packet
);
3733 for (i
= 0; i
< NUM_REGS
+ NUM_PSEUDO_REGS
; i
++)
3735 struct packet_reg
*r
= &rsa
->regs
[i
];
3737 regcache_raw_collect (current_regcache
, r
->regnum
, regs
+ r
->offset
);
3741 /* Command describes registers byte by byte,
3742 each byte encoded as two hex characters. */
3745 /* remote_prepare_to_store insures that register_bytes_found gets set. */
3746 bin2hex (regs
, p
, register_bytes_found
);
3747 remote_send (&rs
->buf
, &rs
->buf_size
);
3751 /* Return the number of hex digits in num. */
3754 hexnumlen (ULONGEST num
)
3758 for (i
= 0; num
!= 0; i
++)
3764 /* Set BUF to the minimum number of hex digits representing NUM. */
3767 hexnumstr (char *buf
, ULONGEST num
)
3769 int len
= hexnumlen (num
);
3770 return hexnumnstr (buf
, num
, len
);
3774 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
3777 hexnumnstr (char *buf
, ULONGEST num
, int width
)
3783 for (i
= width
- 1; i
>= 0; i
--)
3785 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
3792 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
3795 remote_address_masked (CORE_ADDR addr
)
3797 if (remote_address_size
> 0
3798 && remote_address_size
< (sizeof (ULONGEST
) * 8))
3800 /* Only create a mask when that mask can safely be constructed
3801 in a ULONGEST variable. */
3803 mask
= (mask
<< remote_address_size
) - 1;
3809 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
3810 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
3811 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
3812 (which may be more than *OUT_LEN due to escape characters). The
3813 total number of bytes in the output buffer will be at most
3817 remote_escape_output (const gdb_byte
*buffer
, int len
,
3818 gdb_byte
*out_buf
, int *out_len
,
3821 int input_index
, output_index
;
3824 for (input_index
= 0; input_index
< len
; input_index
++)
3826 gdb_byte b
= buffer
[input_index
];
3828 if (b
== '$' || b
== '#' || b
== '}')
3830 /* These must be escaped. */
3831 if (output_index
+ 2 > out_maxlen
)
3833 out_buf
[output_index
++] = '}';
3834 out_buf
[output_index
++] = b
^ 0x20;
3838 if (output_index
+ 1 > out_maxlen
)
3840 out_buf
[output_index
++] = b
;
3844 *out_len
= input_index
;
3845 return output_index
;
3848 /* Convert BUFFER, escaped data LEN bytes long, into binary data
3849 in OUT_BUF. Return the number of bytes written to OUT_BUF.
3850 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
3852 This function reverses remote_escape_output. It allows more
3853 escaped characters than that function does, in particular because
3854 '*' must be escaped to avoid the run-length encoding processing
3855 in reading packets. */
3858 remote_unescape_input (const gdb_byte
*buffer
, int len
,
3859 gdb_byte
*out_buf
, int out_maxlen
)
3861 int input_index
, output_index
;
3866 for (input_index
= 0; input_index
< len
; input_index
++)
3868 gdb_byte b
= buffer
[input_index
];
3870 if (output_index
+ 1 > out_maxlen
)
3872 warning (_("Received too much data from remote target;"
3873 " ignoring overflow."));
3874 return output_index
;
3879 out_buf
[output_index
++] = b
^ 0x20;
3885 out_buf
[output_index
++] = b
;
3889 error (_("Unmatched escape character in target response."));
3891 return output_index
;
3894 /* Determine whether the remote target supports binary downloading.
3895 This is accomplished by sending a no-op memory write of zero length
3896 to the target at the specified address. It does not suffice to send
3897 the whole packet, since many stubs strip the eighth bit and
3898 subsequently compute a wrong checksum, which causes real havoc with
3901 NOTE: This can still lose if the serial line is not eight-bit
3902 clean. In cases like this, the user should clear "remote
3906 check_binary_download (CORE_ADDR addr
)
3908 struct remote_state
*rs
= get_remote_state ();
3910 switch (remote_protocol_packets
[PACKET_X
].support
)
3912 case PACKET_DISABLE
:
3916 case PACKET_SUPPORT_UNKNOWN
:
3922 p
+= hexnumstr (p
, (ULONGEST
) addr
);
3924 p
+= hexnumstr (p
, (ULONGEST
) 0);
3928 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
3929 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3931 if (rs
->buf
[0] == '\0')
3934 fprintf_unfiltered (gdb_stdlog
,
3935 "binary downloading NOT suppported by target\n");
3936 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
3941 fprintf_unfiltered (gdb_stdlog
,
3942 "binary downloading suppported by target\n");
3943 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
3950 /* Write memory data directly to the remote machine.
3951 This does not inform the data cache; the data cache uses this.
3952 HEADER is the starting part of the packet.
3953 MEMADDR is the address in the remote memory space.
3954 MYADDR is the address of the buffer in our space.
3955 LEN is the number of bytes.
3956 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
3957 should send data as binary ('X'), or hex-encoded ('M').
3959 The function creates packet of the form
3960 <HEADER><ADDRESS>,<LENGTH>:<DATA>
3962 where encoding of <DATA> is termined by PACKET_FORMAT.
3964 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
3967 Returns the number of bytes transferred, or 0 (setting errno) for
3968 error. Only transfer a single packet. */
3971 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
3972 const gdb_byte
*myaddr
, int len
,
3973 char packet_format
, int use_length
)
3975 struct remote_state
*rs
= get_remote_state ();
3985 if (packet_format
!= 'X' && packet_format
!= 'M')
3986 internal_error (__FILE__
, __LINE__
,
3987 "remote_write_bytes_aux: bad packet format");
3989 /* Should this be the selected frame? */
3990 gdbarch_remote_translate_xfer_address (current_gdbarch
,
3998 payload_size
= get_memory_write_packet_size ();
4000 /* The packet buffer will be large enough for the payload;
4001 get_memory_packet_size ensures this. */
4004 /* Compute the size of the actual payload by subtracting out the
4005 packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
4007 payload_size
-= strlen ("$,:#NN");
4009 /* The comma won't be used. */
4011 header_length
= strlen (header
);
4012 payload_size
-= header_length
;
4013 payload_size
-= hexnumlen (memaddr
);
4015 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
4017 strcat (rs
->buf
, header
);
4018 p
= rs
->buf
+ strlen (header
);
4020 /* Compute a best guess of the number of bytes actually transfered. */
4021 if (packet_format
== 'X')
4023 /* Best guess at number of bytes that will fit. */
4024 todo
= min (len
, payload_size
);
4026 payload_size
-= hexnumlen (todo
);
4027 todo
= min (todo
, payload_size
);
4031 /* Num bytes that will fit. */
4032 todo
= min (len
, payload_size
/ 2);
4034 payload_size
-= hexnumlen (todo
);
4035 todo
= min (todo
, payload_size
/ 2);
4039 internal_error (__FILE__
, __LINE__
,
4040 _("minumum packet size too small to write data"));
4042 /* If we already need another packet, then try to align the end
4043 of this packet to a useful boundary. */
4044 if (todo
> 2 * REMOTE_ALIGN_WRITES
&& todo
< len
)
4045 todo
= ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
4047 /* Append "<memaddr>". */
4048 memaddr
= remote_address_masked (memaddr
);
4049 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
4056 /* Append <len>. Retain the location/size of <len>. It may need to
4057 be adjusted once the packet body has been created. */
4059 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
4067 /* Append the packet body. */
4068 if (packet_format
== 'X')
4070 /* Binary mode. Send target system values byte by byte, in
4071 increasing byte addresses. Only escape certain critical
4073 payload_length
= remote_escape_output (myaddr
, todo
, p
, &nr_bytes
,
4076 /* If not all TODO bytes fit, then we'll need another packet. Make
4077 a second try to keep the end of the packet aligned. Don't do
4078 this if the packet is tiny. */
4079 if (nr_bytes
< todo
&& nr_bytes
> 2 * REMOTE_ALIGN_WRITES
)
4083 new_nr_bytes
= (((memaddr
+ nr_bytes
) & ~(REMOTE_ALIGN_WRITES
- 1))
4085 if (new_nr_bytes
!= nr_bytes
)
4086 payload_length
= remote_escape_output (myaddr
, new_nr_bytes
,
4091 p
+= payload_length
;
4092 if (use_length
&& nr_bytes
< todo
)
4094 /* Escape chars have filled up the buffer prematurely,
4095 and we have actually sent fewer bytes than planned.
4096 Fix-up the length field of the packet. Use the same
4097 number of characters as before. */
4098 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
4099 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
4104 /* Normal mode: Send target system values byte by byte, in
4105 increasing byte addresses. Each byte is encoded as a two hex
4107 nr_bytes
= bin2hex (myaddr
, p
, todo
);
4111 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
4112 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4114 if (rs
->buf
[0] == 'E')
4116 /* There is no correspondance between what the remote protocol
4117 uses for errors and errno codes. We would like a cleaner way
4118 of representing errors (big enough to include errno codes,
4119 bfd_error codes, and others). But for now just return EIO. */
4124 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
4125 fewer bytes than we'd planned. */
4129 /* Write memory data directly to the remote machine.
4130 This does not inform the data cache; the data cache uses this.
4131 MEMADDR is the address in the remote memory space.
4132 MYADDR is the address of the buffer in our space.
4133 LEN is the number of bytes.
4135 Returns number of bytes transferred, or 0 (setting errno) for
4136 error. Only transfer a single packet. */
4139 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, int len
)
4141 char *packet_format
= 0;
4143 /* Check whether the target supports binary download. */
4144 check_binary_download (memaddr
);
4146 switch (remote_protocol_packets
[PACKET_X
].support
)
4149 packet_format
= "X";
4151 case PACKET_DISABLE
:
4152 packet_format
= "M";
4154 case PACKET_SUPPORT_UNKNOWN
:
4155 internal_error (__FILE__
, __LINE__
,
4156 _("remote_write_bytes: bad internal state"));
4158 internal_error (__FILE__
, __LINE__
, _("bad switch"));
4161 return remote_write_bytes_aux (packet_format
,
4162 memaddr
, myaddr
, len
, packet_format
[0], 1);
4165 /* Read memory data directly from the remote machine.
4166 This does not use the data cache; the data cache uses this.
4167 MEMADDR is the address in the remote memory space.
4168 MYADDR is the address of the buffer in our space.
4169 LEN is the number of bytes.
4171 Returns number of bytes transferred, or 0 for error. */
4173 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
4174 remote targets) shouldn't attempt to read the entire buffer.
4175 Instead it should read a single packet worth of data and then
4176 return the byte size of that packet to the caller. The caller (its
4177 caller and its callers caller ;-) already contains code for
4178 handling partial reads. */
4181 remote_read_bytes (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
4183 struct remote_state
*rs
= get_remote_state ();
4184 int max_buf_size
; /* Max size of packet output buffer. */
4187 /* Should this be the selected frame? */
4188 gdbarch_remote_translate_xfer_address (current_gdbarch
,
4196 max_buf_size
= get_memory_read_packet_size ();
4197 /* The packet buffer will be large enough for the payload;
4198 get_memory_packet_size ensures this. */
4207 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
4209 /* construct "m"<memaddr>","<len>" */
4210 /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */
4211 memaddr
= remote_address_masked (memaddr
);
4214 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
4216 p
+= hexnumstr (p
, (ULONGEST
) todo
);
4220 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4222 if (rs
->buf
[0] == 'E'
4223 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
4224 && rs
->buf
[3] == '\0')
4226 /* There is no correspondance between what the remote
4227 protocol uses for errors and errno codes. We would like
4228 a cleaner way of representing errors (big enough to
4229 include errno codes, bfd_error codes, and others). But
4230 for now just return EIO. */
4235 /* Reply describes memory byte by byte,
4236 each byte encoded as two hex characters. */
4239 if ((i
= hex2bin (p
, myaddr
, todo
)) < todo
)
4241 /* Reply is short. This means that we were able to read
4242 only part of what we wanted to. */
4243 return i
+ (origlen
- len
);
4252 /* Read or write LEN bytes from inferior memory at MEMADDR,
4253 transferring to or from debugger address BUFFER. Write to inferior
4254 if SHOULD_WRITE is nonzero. Returns length of data written or
4255 read; 0 for error. TARGET is unused. */
4258 remote_xfer_memory (CORE_ADDR mem_addr
, gdb_byte
*buffer
, int mem_len
,
4259 int should_write
, struct mem_attrib
*attrib
,
4260 struct target_ops
*target
)
4265 res
= remote_write_bytes (mem_addr
, buffer
, mem_len
);
4267 res
= remote_read_bytes (mem_addr
, buffer
, mem_len
);
4272 /* Sends a packet with content determined by the printf format string
4273 FORMAT and the remaining arguments, then gets the reply. Returns
4274 whether the packet was a success, a failure, or unknown. */
4277 remote_send_printf (const char *format
, ...)
4279 struct remote_state
*rs
= get_remote_state ();
4280 int max_size
= get_remote_packet_size ();
4283 va_start (ap
, format
);
4286 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
4287 internal_error (__FILE__
, __LINE__
, "Too long remote packet.");
4289 if (putpkt (rs
->buf
) < 0)
4290 error (_("Communication problem with target."));
4293 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4295 return packet_check_result (rs
->buf
);
4299 restore_remote_timeout (void *p
)
4301 int value
= *(int *)p
;
4302 remote_timeout
= value
;
4305 /* Flash writing can take quite some time. We'll set
4306 effectively infinite timeout for flash operations.
4307 In future, we'll need to decide on a better approach. */
4308 static const int remote_flash_timeout
= 1000;
4311 remote_flash_erase (struct target_ops
*ops
,
4312 ULONGEST address
, LONGEST length
)
4314 int saved_remote_timeout
= remote_timeout
;
4315 enum packet_result ret
;
4317 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
4318 &saved_remote_timeout
);
4319 remote_timeout
= remote_flash_timeout
;
4321 ret
= remote_send_printf ("vFlashErase:%s,%s",
4326 case PACKET_UNKNOWN
:
4327 error (_("Remote target does not support flash erase"));
4329 error (_("Error erasing flash with vFlashErase packet"));
4334 do_cleanups (back_to
);
4338 remote_flash_write (struct target_ops
*ops
,
4339 ULONGEST address
, LONGEST length
,
4340 const gdb_byte
*data
)
4342 int saved_remote_timeout
= remote_timeout
;
4344 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
4345 &saved_remote_timeout
);
4347 remote_timeout
= remote_flash_timeout
;
4348 ret
= remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 'X', 0);
4349 do_cleanups (back_to
);
4355 remote_flash_done (struct target_ops
*ops
)
4357 int saved_remote_timeout
= remote_timeout
;
4359 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
4360 &saved_remote_timeout
);
4362 remote_timeout
= remote_flash_timeout
;
4363 ret
= remote_send_printf ("vFlashDone");
4364 do_cleanups (back_to
);
4368 case PACKET_UNKNOWN
:
4369 error (_("Remote target does not support vFlashDone"));
4371 error (_("Error finishing flash operation"));
4378 remote_files_info (struct target_ops
*ignore
)
4380 puts_filtered ("Debugging a target over a serial line.\n");
4383 /* Stuff for dealing with the packets which are part of this protocol.
4384 See comment at top of file for details. */
4386 /* Read a single character from the remote end. */
4389 readchar (int timeout
)
4393 ch
= serial_readchar (remote_desc
, timeout
);
4398 switch ((enum serial_rc
) ch
)
4401 target_mourn_inferior ();
4402 error (_("Remote connection closed"));
4405 perror_with_name (_("Remote communication error"));
4407 case SERIAL_TIMEOUT
:
4413 /* Send the command in *BUF to the remote machine, and read the reply
4414 into *BUF. Report an error if we get an error reply. Resize
4415 *BUF using xrealloc if necessary to hold the result, and update
4419 remote_send (char **buf
,
4423 getpkt (buf
, sizeof_buf
, 0);
4425 if ((*buf
)[0] == 'E')
4426 error (_("Remote failure reply: %s"), *buf
);
4429 /* Display a null-terminated packet on stdout, for debugging, using C
4433 print_packet (char *buf
)
4435 puts_filtered ("\"");
4436 fputstr_filtered (buf
, '"', gdb_stdout
);
4437 puts_filtered ("\"");
4443 return putpkt_binary (buf
, strlen (buf
));
4446 /* Send a packet to the remote machine, with error checking. The data
4447 of the packet is in BUF. The string in BUF can be at most
4448 get_remote_packet_size () - 5 to account for the $, # and checksum,
4449 and for a possible /0 if we are debugging (remote_debug) and want
4450 to print the sent packet as a string. */
4453 putpkt_binary (char *buf
, int cnt
)
4456 unsigned char csum
= 0;
4457 char *buf2
= alloca (cnt
+ 6);
4463 /* Copy the packet into buffer BUF2, encapsulating it
4464 and giving it a checksum. */
4469 for (i
= 0; i
< cnt
; i
++)
4475 *p
++ = tohex ((csum
>> 4) & 0xf);
4476 *p
++ = tohex (csum
& 0xf);
4478 /* Send it over and over until we get a positive ack. */
4482 int started_error_output
= 0;
4487 fprintf_unfiltered (gdb_stdlog
, "Sending packet: ");
4488 fputstrn_unfiltered (buf2
, p
- buf2
, 0, gdb_stdlog
);
4489 fprintf_unfiltered (gdb_stdlog
, "...");
4490 gdb_flush (gdb_stdlog
);
4492 if (serial_write (remote_desc
, buf2
, p
- buf2
))
4493 perror_with_name (_("putpkt: write failed"));
4495 /* Read until either a timeout occurs (-2) or '+' is read. */
4498 ch
= readchar (remote_timeout
);
4506 case SERIAL_TIMEOUT
:
4508 if (started_error_output
)
4510 putchar_unfiltered ('\n');
4511 started_error_output
= 0;
4520 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
4524 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
4525 case SERIAL_TIMEOUT
:
4529 break; /* Retransmit buffer. */
4533 fprintf_unfiltered (gdb_stdlog
,
4534 "Packet instead of Ack, ignoring it\n");
4535 /* It's probably an old response sent because an ACK
4536 was lost. Gobble up the packet and ack it so it
4537 doesn't get retransmitted when we resend this
4540 serial_write (remote_desc
, "+", 1);
4541 continue; /* Now, go look for +. */
4546 if (!started_error_output
)
4548 started_error_output
= 1;
4549 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
4551 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
4555 break; /* Here to retransmit. */
4559 /* This is wrong. If doing a long backtrace, the user should be
4560 able to get out next time we call QUIT, without anything as
4561 violent as interrupt_query. If we want to provide a way out of
4562 here without getting to the next QUIT, it should be based on
4563 hitting ^C twice as in remote_wait. */
4573 /* Come here after finding the start of a frame when we expected an
4574 ack. Do our best to discard the rest of this packet. */
4583 c
= readchar (remote_timeout
);
4586 case SERIAL_TIMEOUT
:
4587 /* Nothing we can do. */
4590 /* Discard the two bytes of checksum and stop. */
4591 c
= readchar (remote_timeout
);
4593 c
= readchar (remote_timeout
);
4596 case '*': /* Run length encoding. */
4597 /* Discard the repeat count. */
4598 c
= readchar (remote_timeout
);
4603 /* A regular character. */
4609 /* Come here after finding the start of the frame. Collect the rest
4610 into *BUF, verifying the checksum, length, and handling run-length
4611 compression. NUL terminate the buffer. If there is not enough room,
4612 expand *BUF using xrealloc.
4614 Returns -1 on error, number of characters in buffer (ignoring the
4615 trailing NULL) on success. (could be extended to return one of the
4616 SERIAL status indications). */
4619 read_frame (char **buf_p
,
4632 c
= readchar (remote_timeout
);
4635 case SERIAL_TIMEOUT
:
4637 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
4641 fputs_filtered ("Saw new packet start in middle of old one\n",
4643 return -1; /* Start a new packet, count retries. */
4646 unsigned char pktcsum
;
4652 check_0
= readchar (remote_timeout
);
4654 check_1
= readchar (remote_timeout
);
4656 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
4659 fputs_filtered ("Timeout in checksum, retrying\n",
4663 else if (check_0
< 0 || check_1
< 0)
4666 fputs_filtered ("Communication error in checksum\n",
4671 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
4672 if (csum
== pktcsum
)
4677 fprintf_filtered (gdb_stdlog
,
4678 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
4680 fputstrn_filtered (buf
, bc
, 0, gdb_stdlog
);
4681 fputs_filtered ("\n", gdb_stdlog
);
4683 /* Number of characters in buffer ignoring trailing
4687 case '*': /* Run length encoding. */
4692 c
= readchar (remote_timeout
);
4694 repeat
= c
- ' ' + 3; /* Compute repeat count. */
4696 /* The character before ``*'' is repeated. */
4698 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
4700 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
4702 /* Make some more room in the buffer. */
4703 *sizeof_buf
+= repeat
;
4704 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
4708 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
4714 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
4718 if (bc
>= *sizeof_buf
- 1)
4720 /* Make some more room in the buffer. */
4722 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
4733 /* Read a packet from the remote machine, with error checking, and
4734 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
4735 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
4736 rather than timing out; this is used (in synchronous mode) to wait
4737 for a target that is is executing user code to stop. */
4738 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
4739 don't have to change all the calls to getpkt to deal with the
4740 return value, because at the moment I don't know what the right
4741 thing to do it for those. */
4749 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
4753 /* Read a packet from the remote machine, with error checking, and
4754 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
4755 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
4756 rather than timing out; this is used (in synchronous mode) to wait
4757 for a target that is is executing user code to stop. If FOREVER ==
4758 0, this function is allowed to time out gracefully and return an
4759 indication of this to the caller. Otherwise return the number
4762 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
4769 strcpy (*buf
, "timeout");
4773 timeout
= watchdog
> 0 ? watchdog
: -1;
4777 timeout
= remote_timeout
;
4781 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
4783 /* This can loop forever if the remote side sends us characters
4784 continuously, but if it pauses, we'll get a zero from
4785 readchar because of timeout. Then we'll count that as a
4788 /* Note that we will only wait forever prior to the start of a
4789 packet. After that, we expect characters to arrive at a
4790 brisk pace. They should show up within remote_timeout
4795 c
= readchar (timeout
);
4797 if (c
== SERIAL_TIMEOUT
)
4799 if (forever
) /* Watchdog went off? Kill the target. */
4802 target_mourn_inferior ();
4803 error (_("Watchdog has expired. Target detached."));
4806 fputs_filtered ("Timed out.\n", gdb_stdlog
);
4812 /* We've found the start of a packet, now collect the data. */
4814 val
= read_frame (buf
, sizeof_buf
);
4820 fprintf_unfiltered (gdb_stdlog
, "Packet received: ");
4821 fputstrn_unfiltered (*buf
, val
, 0, gdb_stdlog
);
4822 fprintf_unfiltered (gdb_stdlog
, "\n");
4824 serial_write (remote_desc
, "+", 1);
4828 /* Try the whole thing again. */
4830 serial_write (remote_desc
, "-", 1);
4833 /* We have tried hard enough, and just can't receive the packet.
4836 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
4837 serial_write (remote_desc
, "+", 1);
4844 /* For some mysterious reason, wait_for_inferior calls kill instead of
4845 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4849 target_mourn_inferior ();
4853 /* Use catch_errors so the user can quit from gdb even when we aren't on
4854 speaking terms with the remote system. */
4855 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4857 /* Don't wait for it to die. I'm not really sure it matters whether
4858 we do or not. For the existing stubs, kill is a noop. */
4859 target_mourn_inferior ();
4862 /* Async version of remote_kill. */
4864 remote_async_kill (void)
4866 /* Unregister the file descriptor from the event loop. */
4867 if (target_is_async_p ())
4868 serial_async (remote_desc
, NULL
, 0);
4870 /* For some mysterious reason, wait_for_inferior calls kill instead of
4871 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4875 target_mourn_inferior ();
4879 /* Use catch_errors so the user can quit from gdb even when we
4880 aren't on speaking terms with the remote system. */
4881 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4883 /* Don't wait for it to die. I'm not really sure it matters whether
4884 we do or not. For the existing stubs, kill is a noop. */
4885 target_mourn_inferior ();
4891 remote_mourn_1 (&remote_ops
);
4895 remote_async_mourn (void)
4897 remote_mourn_1 (&remote_async_ops
);
4901 extended_remote_mourn (void)
4903 /* We do _not_ want to mourn the target like this; this will
4904 remove the extended remote target from the target stack,
4905 and the next time the user says "run" it'll fail.
4907 FIXME: What is the right thing to do here? */
4909 remote_mourn_1 (&extended_remote_ops
);
4913 /* Worker function for remote_mourn. */
4915 remote_mourn_1 (struct target_ops
*target
)
4917 unpush_target (target
);
4918 generic_mourn_inferior ();
4921 /* In the extended protocol we want to be able to do things like
4922 "run" and have them basically work as expected. So we need
4923 a special create_inferior function.
4925 FIXME: One day add support for changing the exec file
4926 we're debugging, arguments and an environment. */
4929 extended_remote_create_inferior (char *exec_file
, char *args
,
4930 char **env
, int from_tty
)
4932 /* Rip out the breakpoints; we'll reinsert them after restarting
4933 the remote server. */
4934 remove_breakpoints ();
4936 /* Now restart the remote server. */
4937 extended_remote_restart ();
4939 /* Now put the breakpoints back in. This way we're safe if the
4940 restart function works via a unix fork on the remote side. */
4941 insert_breakpoints ();
4943 /* Clean up from the last time we were running. */
4944 clear_proceed_status ();
4947 /* Async version of extended_remote_create_inferior. */
4949 extended_remote_async_create_inferior (char *exec_file
, char *args
,
4950 char **env
, int from_tty
)
4952 /* Rip out the breakpoints; we'll reinsert them after restarting
4953 the remote server. */
4954 remove_breakpoints ();
4956 /* If running asynchronously, register the target file descriptor
4957 with the event loop. */
4958 if (target_can_async_p ())
4959 target_async (inferior_event_handler
, 0);
4961 /* Now restart the remote server. */
4962 extended_remote_restart ();
4964 /* Now put the breakpoints back in. This way we're safe if the
4965 restart function works via a unix fork on the remote side. */
4966 insert_breakpoints ();
4968 /* Clean up from the last time we were running. */
4969 clear_proceed_status ();
4973 /* On some machines, e.g. 68k, we may use a different breakpoint
4974 instruction than other targets; in those use
4975 DEPRECATED_REMOTE_BREAKPOINT instead of just BREAKPOINT_FROM_PC.
4976 Also, bi-endian targets may define
4977 DEPRECATED_LITTLE_REMOTE_BREAKPOINT and
4978 DEPRECATED_BIG_REMOTE_BREAKPOINT. If none of these are defined, we
4979 just call the standard routines that are in mem-break.c. */
4981 /* NOTE: cagney/2003-06-08: This is silly. A remote and simulator
4982 target should use an identical BREAKPOINT_FROM_PC. As for native,
4983 the ARCH-OS-tdep.c code can override the default. */
4985 #if defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && defined (DEPRECATED_BIG_REMOTE_BREAKPOINT) && !defined(DEPRECATED_REMOTE_BREAKPOINT)
4986 #define DEPRECATED_REMOTE_BREAKPOINT
4989 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4991 /* If the target isn't bi-endian, just pretend it is. */
4992 #if !defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && !defined (DEPRECATED_BIG_REMOTE_BREAKPOINT)
4993 #define DEPRECATED_LITTLE_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
4994 #define DEPRECATED_BIG_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
4997 static unsigned char big_break_insn
[] = DEPRECATED_BIG_REMOTE_BREAKPOINT
;
4998 static unsigned char little_break_insn
[] = DEPRECATED_LITTLE_REMOTE_BREAKPOINT
;
5000 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
5002 /* Insert a breakpoint. On targets that have software breakpoint
5003 support, we ask the remote target to do the work; on targets
5004 which don't, we insert a traditional memory breakpoint. */
5007 remote_insert_breakpoint (struct bp_target_info
*bp_tgt
)
5009 CORE_ADDR addr
= bp_tgt
->placed_address
;
5010 struct remote_state
*rs
= get_remote_state ();
5011 #ifdef DEPRECATED_REMOTE_BREAKPOINT
5015 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
5016 If it succeeds, then set the support to PACKET_ENABLE. If it
5017 fails, and the user has explicitly requested the Z support then
5018 report an error, otherwise, mark it disabled and go on. */
5020 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
5027 BREAKPOINT_FROM_PC (&bp_tgt
->placed_address
, &bp_tgt
->placed_size
);
5028 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
5029 p
+= hexnumstr (p
, addr
);
5030 sprintf (p
, ",%d", bp_tgt
->placed_size
);
5033 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5035 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
5041 case PACKET_UNKNOWN
:
5046 #ifdef DEPRECATED_REMOTE_BREAKPOINT
5047 bp_tgt
->placed_size
= bp_tgt
->shadow_len
= sizeof big_break_insn
;
5048 val
= target_read_memory (addr
, bp_tgt
->shadow_contents
, bp_tgt
->shadow_len
);
5052 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
5053 val
= target_write_memory (addr
, (char *) big_break_insn
,
5054 sizeof big_break_insn
);
5056 val
= target_write_memory (addr
, (char *) little_break_insn
,
5057 sizeof little_break_insn
);
5062 return memory_insert_breakpoint (bp_tgt
);
5063 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
5067 remote_remove_breakpoint (struct bp_target_info
*bp_tgt
)
5069 CORE_ADDR addr
= bp_tgt
->placed_address
;
5070 struct remote_state
*rs
= get_remote_state ();
5073 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
5081 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
5082 p
+= hexnumstr (p
, addr
);
5083 sprintf (p
, ",%d", bp_tgt
->placed_size
);
5086 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5088 return (rs
->buf
[0] == 'E');
5091 #ifdef DEPRECATED_REMOTE_BREAKPOINT
5092 return target_write_memory (bp_tgt
->placed_address
, bp_tgt
->shadow_contents
,
5093 bp_tgt
->shadow_len
);
5095 return memory_remove_breakpoint (bp_tgt
);
5096 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
5100 watchpoint_to_Z_packet (int type
)
5105 return Z_PACKET_WRITE_WP
;
5108 return Z_PACKET_READ_WP
;
5111 return Z_PACKET_ACCESS_WP
;
5114 internal_error (__FILE__
, __LINE__
,
5115 _("hw_bp_to_z: bad watchpoint type %d"), type
);
5120 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
5122 struct remote_state
*rs
= get_remote_state ();
5124 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
5126 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
5129 sprintf (rs
->buf
, "Z%x,", packet
);
5130 p
= strchr (rs
->buf
, '\0');
5131 addr
= remote_address_masked (addr
);
5132 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5133 sprintf (p
, ",%x", len
);
5136 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5138 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
5141 case PACKET_UNKNOWN
:
5146 internal_error (__FILE__
, __LINE__
,
5147 _("remote_insert_watchpoint: reached end of function"));
5152 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
5154 struct remote_state
*rs
= get_remote_state ();
5156 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
5158 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
5161 sprintf (rs
->buf
, "z%x,", packet
);
5162 p
= strchr (rs
->buf
, '\0');
5163 addr
= remote_address_masked (addr
);
5164 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5165 sprintf (p
, ",%x", len
);
5167 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5169 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
5172 case PACKET_UNKNOWN
:
5177 internal_error (__FILE__
, __LINE__
,
5178 _("remote_remove_watchpoint: reached end of function"));
5182 int remote_hw_watchpoint_limit
= -1;
5183 int remote_hw_breakpoint_limit
= -1;
5186 remote_check_watch_resources (int type
, int cnt
, int ot
)
5188 if (type
== bp_hardware_breakpoint
)
5190 if (remote_hw_breakpoint_limit
== 0)
5192 else if (remote_hw_breakpoint_limit
< 0)
5194 else if (cnt
<= remote_hw_breakpoint_limit
)
5199 if (remote_hw_watchpoint_limit
== 0)
5201 else if (remote_hw_watchpoint_limit
< 0)
5205 else if (cnt
<= remote_hw_watchpoint_limit
)
5212 remote_stopped_by_watchpoint (void)
5214 return remote_stopped_by_watchpoint_p
;
5217 extern int stepped_after_stopped_by_watchpoint
;
5220 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
5223 if (remote_stopped_by_watchpoint ()
5224 || stepped_after_stopped_by_watchpoint
)
5226 *addr_p
= remote_watch_data_address
;
5235 remote_insert_hw_breakpoint (struct bp_target_info
*bp_tgt
)
5238 struct remote_state
*rs
= get_remote_state ();
5241 /* The length field should be set to the size of a breakpoint
5242 instruction, even though we aren't inserting one ourselves. */
5244 BREAKPOINT_FROM_PC (&bp_tgt
->placed_address
, &bp_tgt
->placed_size
);
5246 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
5253 addr
= remote_address_masked (bp_tgt
->placed_address
);
5254 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5255 sprintf (p
, ",%x", bp_tgt
->placed_size
);
5258 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5260 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
5263 case PACKET_UNKNOWN
:
5268 internal_error (__FILE__
, __LINE__
,
5269 _("remote_insert_hw_breakpoint: reached end of function"));
5274 remote_remove_hw_breakpoint (struct bp_target_info
*bp_tgt
)
5277 struct remote_state
*rs
= get_remote_state ();
5280 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
5287 addr
= remote_address_masked (bp_tgt
->placed_address
);
5288 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5289 sprintf (p
, ",%x", bp_tgt
->placed_size
);
5292 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5294 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
5297 case PACKET_UNKNOWN
:
5302 internal_error (__FILE__
, __LINE__
,
5303 _("remote_remove_hw_breakpoint: reached end of function"));
5306 /* Some targets are only capable of doing downloads, and afterwards
5307 they switch to the remote serial protocol. This function provides
5308 a clean way to get from the download target to the remote target.
5309 It's basically just a wrapper so that we don't have to expose any
5310 of the internal workings of remote.c.
5312 Prior to calling this routine, you should shutdown the current
5313 target code, else you will get the "A program is being debugged
5314 already..." message. Usually a call to pop_target() suffices. */
5317 push_remote_target (char *name
, int from_tty
)
5319 printf_filtered (_("Switching to remote protocol\n"));
5320 remote_open (name
, from_tty
);
5323 /* Table used by the crc32 function to calcuate the checksum. */
5325 static unsigned long crc32_table
[256] =
5328 static unsigned long
5329 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
5331 if (!crc32_table
[1])
5333 /* Initialize the CRC table and the decoding table. */
5337 for (i
= 0; i
< 256; i
++)
5339 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
5340 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
5347 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
5353 /* compare-sections command
5355 With no arguments, compares each loadable section in the exec bfd
5356 with the same memory range on the target, and reports mismatches.
5357 Useful for verifying the image on the target against the exec file.
5358 Depends on the target understanding the new "qCRC:" request. */
5360 /* FIXME: cagney/1999-10-26: This command should be broken down into a
5361 target method (target verify memory) and generic version of the
5362 actual command. This will allow other high-level code (especially
5363 generic_load()) to make use of this target functionality. */
5366 compare_sections_command (char *args
, int from_tty
)
5368 struct remote_state
*rs
= get_remote_state ();
5370 unsigned long host_crc
, target_crc
;
5371 extern bfd
*exec_bfd
;
5372 struct cleanup
*old_chain
;
5375 const char *sectname
;
5382 error (_("command cannot be used without an exec file"));
5383 if (!current_target
.to_shortname
||
5384 strcmp (current_target
.to_shortname
, "remote") != 0)
5385 error (_("command can only be used with remote target"));
5387 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
5389 if (!(s
->flags
& SEC_LOAD
))
5390 continue; /* skip non-loadable section */
5392 size
= bfd_get_section_size (s
);
5394 continue; /* skip zero-length section */
5396 sectname
= bfd_get_section_name (exec_bfd
, s
);
5397 if (args
&& strcmp (args
, sectname
) != 0)
5398 continue; /* not the section selected by user */
5400 matched
= 1; /* do this section */
5402 /* FIXME: assumes lma can fit into long. */
5403 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
5404 (long) lma
, (long) size
);
5407 /* Be clever; compute the host_crc before waiting for target
5409 sectdata
= xmalloc (size
);
5410 old_chain
= make_cleanup (xfree
, sectdata
);
5411 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
5412 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
5414 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5415 if (rs
->buf
[0] == 'E')
5416 error (_("target memory fault, section %s, range 0x%s -- 0x%s"),
5417 sectname
, paddr (lma
), paddr (lma
+ size
));
5418 if (rs
->buf
[0] != 'C')
5419 error (_("remote target does not support this operation"));
5421 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
5422 target_crc
= target_crc
* 16 + fromhex (*tmp
);
5424 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
5425 sectname
, paddr (lma
), paddr (lma
+ size
));
5426 if (host_crc
== target_crc
)
5427 printf_filtered ("matched.\n");
5430 printf_filtered ("MIS-MATCHED!\n");
5434 do_cleanups (old_chain
);
5437 warning (_("One or more sections of the remote executable does not match\n\
5438 the loaded file\n"));
5439 if (args
&& !matched
)
5440 printf_filtered (_("No loaded section named '%s'.\n"), args
);
5443 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
5444 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
5445 number of bytes read is returned, or 0 for EOF, or -1 for error.
5446 The number of bytes read may be less than LEN without indicating an
5447 EOF. PACKET is checked and updated to indicate whether the remote
5448 target supports this object. */
5451 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
5453 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
5454 struct packet_config
*packet
)
5456 static char *finished_object
;
5457 static char *finished_annex
;
5458 static ULONGEST finished_offset
;
5460 struct remote_state
*rs
= get_remote_state ();
5461 unsigned int total
= 0;
5462 LONGEST i
, n
, packet_len
;
5464 if (packet
->support
== PACKET_DISABLE
)
5467 /* Check whether we've cached an end-of-object packet that matches
5469 if (finished_object
)
5471 if (strcmp (object_name
, finished_object
) == 0
5472 && strcmp (annex
? annex
: "", finished_annex
) == 0
5473 && offset
== finished_offset
)
5476 /* Otherwise, we're now reading something different. Discard
5478 xfree (finished_object
);
5479 xfree (finished_annex
);
5480 finished_object
= NULL
;
5481 finished_annex
= NULL
;
5484 /* Request only enough to fit in a single packet. The actual data
5485 may not, since we don't know how much of it will need to be escaped;
5486 the target is free to respond with slightly less data. We subtract
5487 five to account for the response type and the protocol frame. */
5488 n
= min (get_remote_packet_size () - 5, len
);
5489 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
5490 object_name
, annex
? annex
: "",
5491 phex_nz (offset
, sizeof offset
),
5492 phex_nz (n
, sizeof n
));
5493 i
= putpkt (rs
->buf
);
5498 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
5499 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
5502 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
5503 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
5505 /* 'm' means there is (or at least might be) more data after this
5506 batch. That does not make sense unless there's at least one byte
5507 of data in this reply. */
5508 if (rs
->buf
[0] == 'm' && packet_len
== 1)
5509 error (_("Remote qXfer reply contained no data."));
5511 /* Got some data. */
5512 i
= remote_unescape_input (rs
->buf
+ 1, packet_len
- 1, readbuf
, n
);
5514 /* 'l' is an EOF marker, possibly including a final block of data,
5515 or possibly empty. Record it to bypass the next read, if one is
5517 if (rs
->buf
[0] == 'l')
5519 finished_object
= xstrdup (object_name
);
5520 finished_annex
= xstrdup (annex
? annex
: "");
5521 finished_offset
= offset
+ i
;
5528 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
5529 const char *annex
, gdb_byte
*readbuf
,
5530 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
5532 struct remote_state
*rs
= get_remote_state ();
5537 /* Handle memory using the standard memory routines. */
5538 if (object
== TARGET_OBJECT_MEMORY
)
5543 if (writebuf
!= NULL
)
5544 xfered
= remote_write_bytes (offset
, writebuf
, len
);
5546 xfered
= remote_read_bytes (offset
, readbuf
, len
);
5550 else if (xfered
== 0 && errno
== 0)
5556 /* Only handle flash writes. */
5557 if (writebuf
!= NULL
)
5563 case TARGET_OBJECT_FLASH
:
5564 xfered
= remote_flash_write (ops
, offset
, len
, writebuf
);
5568 else if (xfered
== 0 && errno
== 0)
5578 /* Map pre-existing objects onto letters. DO NOT do this for new
5579 objects!!! Instead specify new query packets. */
5582 case TARGET_OBJECT_AVR
:
5586 case TARGET_OBJECT_AUXV
:
5587 gdb_assert (annex
== NULL
);
5588 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
5589 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
5591 case TARGET_OBJECT_MEMORY_MAP
:
5592 gdb_assert (annex
== NULL
);
5593 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
5594 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
5600 /* Note: a zero OFFSET and LEN can be used to query the minimum
5602 if (offset
== 0 && len
== 0)
5603 return (get_remote_packet_size ());
5604 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
5605 large enough let the caller deal with it. */
5606 if (len
< get_remote_packet_size ())
5608 len
= get_remote_packet_size ();
5610 /* Except for querying the minimum buffer size, target must be open. */
5612 error (_("remote query is only available after target open"));
5614 gdb_assert (annex
!= NULL
);
5615 gdb_assert (readbuf
!= NULL
);
5621 /* We used one buffer char for the remote protocol q command and
5622 another for the query type. As the remote protocol encapsulation
5623 uses 4 chars plus one extra in case we are debugging
5624 (remote_debug), we have PBUFZIZ - 7 left to pack the query
5627 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
5629 /* Bad caller may have sent forbidden characters. */
5630 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
5635 gdb_assert (annex
[i
] == '\0');
5637 i
= putpkt (rs
->buf
);
5641 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5642 strcpy ((char *) readbuf
, rs
->buf
);
5644 return strlen ((char *) readbuf
);
5648 remote_rcmd (char *command
,
5649 struct ui_file
*outbuf
)
5651 struct remote_state
*rs
= get_remote_state ();
5655 error (_("remote rcmd is only available after target open"));
5657 /* Send a NULL command across as an empty command. */
5658 if (command
== NULL
)
5661 /* The query prefix. */
5662 strcpy (rs
->buf
, "qRcmd,");
5663 p
= strchr (rs
->buf
, '\0');
5665 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/) > get_remote_packet_size ())
5666 error (_("\"monitor\" command ``%s'' is too long."), command
);
5668 /* Encode the actual command. */
5669 bin2hex ((gdb_byte
*) command
, p
, 0);
5671 if (putpkt (rs
->buf
) < 0)
5672 error (_("Communication problem with target."));
5674 /* get/display the response */
5679 /* XXX - see also tracepoint.c:remote_get_noisy_reply(). */
5681 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5684 error (_("Target does not support this command."));
5685 if (buf
[0] == 'O' && buf
[1] != 'K')
5687 remote_console_output (buf
+ 1); /* 'O' message from stub. */
5690 if (strcmp (buf
, "OK") == 0)
5692 if (strlen (buf
) == 3 && buf
[0] == 'E'
5693 && isdigit (buf
[1]) && isdigit (buf
[2]))
5695 error (_("Protocol error with Rcmd"));
5697 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
5699 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
5700 fputc_unfiltered (c
, outbuf
);
5706 static VEC(mem_region_s
) *
5707 remote_memory_map (struct target_ops
*ops
)
5709 VEC(mem_region_s
) *result
= NULL
;
5710 char *text
= target_read_stralloc (¤t_target
,
5711 TARGET_OBJECT_MEMORY_MAP
, NULL
);
5715 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
5716 result
= parse_memory_map (text
);
5717 do_cleanups (back_to
);
5724 packet_command (char *args
, int from_tty
)
5726 struct remote_state
*rs
= get_remote_state ();
5729 error (_("command can only be used with remote target"));
5732 error (_("remote-packet command requires packet text as argument"));
5734 puts_filtered ("sending: ");
5735 print_packet (args
);
5736 puts_filtered ("\n");
5739 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5740 puts_filtered ("received: ");
5741 print_packet (rs
->buf
);
5742 puts_filtered ("\n");
5746 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
5748 static void display_thread_info (struct gdb_ext_thread_info
*info
);
5750 static void threadset_test_cmd (char *cmd
, int tty
);
5752 static void threadalive_test (char *cmd
, int tty
);
5754 static void threadlist_test_cmd (char *cmd
, int tty
);
5756 int get_and_display_threadinfo (threadref
*ref
);
5758 static void threadinfo_test_cmd (char *cmd
, int tty
);
5760 static int thread_display_step (threadref
*ref
, void *context
);
5762 static void threadlist_update_test_cmd (char *cmd
, int tty
);
5764 static void init_remote_threadtests (void);
5766 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
5769 threadset_test_cmd (char *cmd
, int tty
)
5771 int sample_thread
= SAMPLE_THREAD
;
5773 printf_filtered (_("Remote threadset test\n"));
5774 set_thread (sample_thread
, 1);
5779 threadalive_test (char *cmd
, int tty
)
5781 int sample_thread
= SAMPLE_THREAD
;
5783 if (remote_thread_alive (pid_to_ptid (sample_thread
)))
5784 printf_filtered ("PASS: Thread alive test\n");
5786 printf_filtered ("FAIL: Thread alive test\n");
5789 void output_threadid (char *title
, threadref
*ref
);
5792 output_threadid (char *title
, threadref
*ref
)
5796 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
5798 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
5802 threadlist_test_cmd (char *cmd
, int tty
)
5805 threadref nextthread
;
5806 int done
, result_count
;
5807 threadref threadlist
[3];
5809 printf_filtered ("Remote Threadlist test\n");
5810 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
5811 &result_count
, &threadlist
[0]))
5812 printf_filtered ("FAIL: threadlist test\n");
5815 threadref
*scan
= threadlist
;
5816 threadref
*limit
= scan
+ result_count
;
5818 while (scan
< limit
)
5819 output_threadid (" thread ", scan
++);
5824 display_thread_info (struct gdb_ext_thread_info
*info
)
5826 output_threadid ("Threadid: ", &info
->threadid
);
5827 printf_filtered ("Name: %s\n ", info
->shortname
);
5828 printf_filtered ("State: %s\n", info
->display
);
5829 printf_filtered ("other: %s\n\n", info
->more_display
);
5833 get_and_display_threadinfo (threadref
*ref
)
5837 struct gdb_ext_thread_info threadinfo
;
5839 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
5840 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
5841 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
5842 display_thread_info (&threadinfo
);
5847 threadinfo_test_cmd (char *cmd
, int tty
)
5849 int athread
= SAMPLE_THREAD
;
5853 int_to_threadref (&thread
, athread
);
5854 printf_filtered ("Remote Threadinfo test\n");
5855 if (!get_and_display_threadinfo (&thread
))
5856 printf_filtered ("FAIL cannot get thread info\n");
5860 thread_display_step (threadref
*ref
, void *context
)
5862 /* output_threadid(" threadstep ",ref); *//* simple test */
5863 return get_and_display_threadinfo (ref
);
5867 threadlist_update_test_cmd (char *cmd
, int tty
)
5869 printf_filtered ("Remote Threadlist update test\n");
5870 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
5874 init_remote_threadtests (void)
5876 add_com ("tlist", class_obscure
, threadlist_test_cmd
, _("\
5877 Fetch and print the remote list of thread identifiers, one pkt only"));
5878 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
5879 _("Fetch and display info about one thread"));
5880 add_com ("tset", class_obscure
, threadset_test_cmd
,
5881 _("Test setting to a different thread"));
5882 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
5883 _("Iterate through updating all remote thread info"));
5884 add_com ("talive", class_obscure
, threadalive_test
,
5885 _(" Remote thread alive test "));
5890 /* Convert a thread ID to a string. Returns the string in a static
5894 remote_pid_to_str (ptid_t ptid
)
5896 static char buf
[32];
5898 xsnprintf (buf
, sizeof buf
, "Thread %d", ptid_get_pid (ptid
));
5902 /* Get the address of the thread local variable in OBJFILE which is
5903 stored at OFFSET within the thread local storage for thread PTID. */
5906 remote_get_thread_local_address (ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
5908 if (remote_protocol_packets
[PACKET_qGetTLSAddr
].support
!= PACKET_DISABLE
)
5910 struct remote_state
*rs
= get_remote_state ();
5912 enum packet_result result
;
5914 strcpy (p
, "qGetTLSAddr:");
5916 p
+= hexnumstr (p
, PIDGET (ptid
));
5918 p
+= hexnumstr (p
, offset
);
5920 p
+= hexnumstr (p
, lm
);
5924 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5925 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
5926 if (result
== PACKET_OK
)
5930 unpack_varlen_hex (rs
->buf
, &result
);
5933 else if (result
== PACKET_UNKNOWN
)
5934 throw_error (TLS_GENERIC_ERROR
,
5935 _("Remote target doesn't support qGetTLSAddr packet"));
5937 throw_error (TLS_GENERIC_ERROR
,
5938 _("Remote target failed to process qGetTLSAddr request"));
5941 throw_error (TLS_GENERIC_ERROR
,
5942 _("TLS not supported or disabled on this target"));
5948 init_remote_ops (void)
5950 remote_ops
.to_shortname
= "remote";
5951 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
5953 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5954 Specify the serial device it is connected to\n\
5955 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
5956 remote_ops
.to_open
= remote_open
;
5957 remote_ops
.to_close
= remote_close
;
5958 remote_ops
.to_detach
= remote_detach
;
5959 remote_ops
.to_disconnect
= remote_disconnect
;
5960 remote_ops
.to_resume
= remote_resume
;
5961 remote_ops
.to_wait
= remote_wait
;
5962 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
5963 remote_ops
.to_store_registers
= remote_store_registers
;
5964 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5965 remote_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
5966 remote_ops
.to_files_info
= remote_files_info
;
5967 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5968 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5969 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
5970 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
5971 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
5972 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
5973 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
5974 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
5975 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
5976 remote_ops
.to_kill
= remote_kill
;
5977 remote_ops
.to_load
= generic_load
;
5978 remote_ops
.to_mourn_inferior
= remote_mourn
;
5979 remote_ops
.to_thread_alive
= remote_thread_alive
;
5980 remote_ops
.to_find_new_threads
= remote_threads_info
;
5981 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
5982 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5983 remote_ops
.to_stop
= remote_stop
;
5984 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
5985 remote_ops
.to_rcmd
= remote_rcmd
;
5986 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
5987 remote_ops
.to_stratum
= process_stratum
;
5988 remote_ops
.to_has_all_memory
= 1;
5989 remote_ops
.to_has_memory
= 1;
5990 remote_ops
.to_has_stack
= 1;
5991 remote_ops
.to_has_registers
= 1;
5992 remote_ops
.to_has_execution
= 1;
5993 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
5994 remote_ops
.to_magic
= OPS_MAGIC
;
5995 remote_ops
.to_memory_map
= remote_memory_map
;
5996 remote_ops
.to_flash_erase
= remote_flash_erase
;
5997 remote_ops
.to_flash_done
= remote_flash_done
;
6000 /* Set up the extended remote vector by making a copy of the standard
6001 remote vector and adding to it. */
6004 init_extended_remote_ops (void)
6006 extended_remote_ops
= remote_ops
;
6008 extended_remote_ops
.to_shortname
= "extended-remote";
6009 extended_remote_ops
.to_longname
=
6010 "Extended remote serial target in gdb-specific protocol";
6011 extended_remote_ops
.to_doc
=
6012 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
6013 Specify the serial device it is connected to (e.g. /dev/ttya).",
6014 extended_remote_ops
.to_open
= extended_remote_open
;
6015 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
6016 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
6020 remote_can_async_p (void)
6022 /* We're async whenever the serial device is. */
6023 return (current_target
.to_async_mask_value
) && serial_can_async_p (remote_desc
);
6027 remote_is_async_p (void)
6029 /* We're async whenever the serial device is. */
6030 return (current_target
.to_async_mask_value
) && serial_is_async_p (remote_desc
);
6033 /* Pass the SERIAL event on and up to the client. One day this code
6034 will be able to delay notifying the client of an event until the
6035 point where an entire packet has been received. */
6037 static void (*async_client_callback
) (enum inferior_event_type event_type
,
6039 static void *async_client_context
;
6040 static serial_event_ftype remote_async_serial_handler
;
6043 remote_async_serial_handler (struct serial
*scb
, void *context
)
6045 /* Don't propogate error information up to the client. Instead let
6046 the client find out about the error by querying the target. */
6047 async_client_callback (INF_REG_EVENT
, async_client_context
);
6051 remote_async (void (*callback
) (enum inferior_event_type event_type
,
6052 void *context
), void *context
)
6054 if (current_target
.to_async_mask_value
== 0)
6055 internal_error (__FILE__
, __LINE__
,
6056 _("Calling remote_async when async is masked"));
6058 if (callback
!= NULL
)
6060 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
6061 async_client_callback
= callback
;
6062 async_client_context
= context
;
6065 serial_async (remote_desc
, NULL
, NULL
);
6068 /* Target async and target extended-async.
6070 This are temporary targets, until it is all tested. Eventually
6071 async support will be incorporated int the usual 'remote'
6075 init_remote_async_ops (void)
6077 remote_async_ops
.to_shortname
= "async";
6078 remote_async_ops
.to_longname
=
6079 "Remote serial target in async version of the gdb-specific protocol";
6080 remote_async_ops
.to_doc
=
6081 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
6082 Specify the serial device it is connected to (e.g. /dev/ttya).";
6083 remote_async_ops
.to_open
= remote_async_open
;
6084 remote_async_ops
.to_close
= remote_close
;
6085 remote_async_ops
.to_detach
= remote_detach
;
6086 remote_async_ops
.to_disconnect
= remote_disconnect
;
6087 remote_async_ops
.to_resume
= remote_async_resume
;
6088 remote_async_ops
.to_wait
= remote_async_wait
;
6089 remote_async_ops
.to_fetch_registers
= remote_fetch_registers
;
6090 remote_async_ops
.to_store_registers
= remote_store_registers
;
6091 remote_async_ops
.to_prepare_to_store
= remote_prepare_to_store
;
6092 remote_async_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
6093 remote_async_ops
.to_files_info
= remote_files_info
;
6094 remote_async_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
6095 remote_async_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
6096 remote_async_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
6097 remote_async_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
6098 remote_async_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
6099 remote_async_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
6100 remote_async_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
6101 remote_async_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
6102 remote_async_ops
.to_stopped_data_address
= remote_stopped_data_address
;
6103 remote_async_ops
.to_terminal_inferior
= remote_async_terminal_inferior
;
6104 remote_async_ops
.to_terminal_ours
= remote_async_terminal_ours
;
6105 remote_async_ops
.to_kill
= remote_async_kill
;
6106 remote_async_ops
.to_load
= generic_load
;
6107 remote_async_ops
.to_mourn_inferior
= remote_async_mourn
;
6108 remote_async_ops
.to_thread_alive
= remote_thread_alive
;
6109 remote_async_ops
.to_find_new_threads
= remote_threads_info
;
6110 remote_async_ops
.to_pid_to_str
= remote_pid_to_str
;
6111 remote_async_ops
.to_extra_thread_info
= remote_threads_extra_info
;
6112 remote_async_ops
.to_stop
= remote_stop
;
6113 remote_async_ops
.to_xfer_partial
= remote_xfer_partial
;
6114 remote_async_ops
.to_rcmd
= remote_rcmd
;
6115 remote_async_ops
.to_stratum
= process_stratum
;
6116 remote_async_ops
.to_has_all_memory
= 1;
6117 remote_async_ops
.to_has_memory
= 1;
6118 remote_async_ops
.to_has_stack
= 1;
6119 remote_async_ops
.to_has_registers
= 1;
6120 remote_async_ops
.to_has_execution
= 1;
6121 remote_async_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
6122 remote_async_ops
.to_can_async_p
= remote_can_async_p
;
6123 remote_async_ops
.to_is_async_p
= remote_is_async_p
;
6124 remote_async_ops
.to_async
= remote_async
;
6125 remote_async_ops
.to_async_mask_value
= 1;
6126 remote_async_ops
.to_magic
= OPS_MAGIC
;
6127 remote_async_ops
.to_memory_map
= remote_memory_map
;
6128 remote_async_ops
.to_flash_erase
= remote_flash_erase
;
6129 remote_async_ops
.to_flash_done
= remote_flash_done
;
6132 /* Set up the async extended remote vector by making a copy of the standard
6133 remote vector and adding to it. */
6136 init_extended_async_remote_ops (void)
6138 extended_async_remote_ops
= remote_async_ops
;
6140 extended_async_remote_ops
.to_shortname
= "extended-async";
6141 extended_async_remote_ops
.to_longname
=
6142 "Extended remote serial target in async gdb-specific protocol";
6143 extended_async_remote_ops
.to_doc
=
6144 "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
6145 Specify the serial device it is connected to (e.g. /dev/ttya).",
6146 extended_async_remote_ops
.to_open
= extended_remote_async_open
;
6147 extended_async_remote_ops
.to_create_inferior
= extended_remote_async_create_inferior
;
6148 extended_async_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
6152 set_remote_cmd (char *args
, int from_tty
)
6154 help_list (remote_set_cmdlist
, "set remote ", -1, gdb_stdout
);
6158 show_remote_cmd (char *args
, int from_tty
)
6160 /* We can't just use cmd_show_list here, because we want to skip
6161 the redundant "show remote Z-packet" and the legacy aliases. */
6162 struct cleanup
*showlist_chain
;
6163 struct cmd_list_element
*list
= remote_show_cmdlist
;
6165 showlist_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "showlist");
6166 for (; list
!= NULL
; list
= list
->next
)
6167 if (strcmp (list
->name
, "Z-packet") == 0)
6169 else if (list
->type
== not_set_cmd
)
6170 /* Alias commands are exactly like the original, except they
6171 don't have the normal type. */
6175 struct cleanup
*option_chain
6176 = make_cleanup_ui_out_tuple_begin_end (uiout
, "option");
6177 ui_out_field_string (uiout
, "name", list
->name
);
6178 ui_out_text (uiout
, ": ");
6179 if (list
->type
== show_cmd
)
6180 do_setshow_command ((char *) NULL
, from_tty
, list
);
6182 cmd_func (list
, NULL
, from_tty
);
6183 /* Close the tuple. */
6184 do_cleanups (option_chain
);
6187 /* Close the tuple. */
6188 do_cleanups (showlist_chain
);
6192 build_remote_gdbarch_data (void)
6194 remote_address_size
= TARGET_ADDR_BIT
;
6197 /* Saved pointer to previous owner of the new_objfile event. */
6198 static void (*remote_new_objfile_chain
) (struct objfile
*);
6200 /* Function to be called whenever a new objfile (shlib) is detected. */
6202 remote_new_objfile (struct objfile
*objfile
)
6204 if (remote_desc
!= 0) /* Have a remote connection. */
6206 remote_check_symbols (objfile
);
6208 /* Call predecessor on chain, if any. */
6209 if (remote_new_objfile_chain
)
6210 remote_new_objfile_chain (objfile
);
6214 _initialize_remote (void)
6216 struct remote_state
*rs
;
6218 /* architecture specific data */
6219 remote_gdbarch_data_handle
=
6220 gdbarch_data_register_post_init (init_remote_state
);
6222 /* Old tacky stuff. NOTE: This comes after the remote protocol so
6223 that the remote protocol has been initialized. */
6224 DEPRECATED_REGISTER_GDBARCH_SWAP (remote_address_size
);
6225 deprecated_register_gdbarch_swap (NULL
, 0, build_remote_gdbarch_data
);
6227 /* Initialize the per-target state. At the moment there is only one
6228 of these, not one per target. Only one target is active at a
6229 time. The default buffer size is unimportant; it will be expanded
6230 whenever a larger buffer is needed. */
6231 rs
= get_remote_state_raw ();
6233 rs
->buf
= xmalloc (rs
->buf_size
);
6236 add_target (&remote_ops
);
6238 init_extended_remote_ops ();
6239 add_target (&extended_remote_ops
);
6241 init_remote_async_ops ();
6242 add_target (&remote_async_ops
);
6244 init_extended_async_remote_ops ();
6245 add_target (&extended_async_remote_ops
);
6247 /* Hook into new objfile notification. */
6248 remote_new_objfile_chain
= deprecated_target_new_objfile_hook
;
6249 deprecated_target_new_objfile_hook
= remote_new_objfile
;
6252 init_remote_threadtests ();
6255 /* set/show remote ... */
6257 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
6258 Remote protocol specific variables\n\
6259 Configure various remote-protocol specific variables such as\n\
6260 the packets being used"),
6261 &remote_set_cmdlist
, "set remote ",
6262 0 /* allow-unknown */, &setlist
);
6263 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
6264 Remote protocol specific variables\n\
6265 Configure various remote-protocol specific variables such as\n\
6266 the packets being used"),
6267 &remote_show_cmdlist
, "show remote ",
6268 0 /* allow-unknown */, &showlist
);
6270 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
6271 Compare section data on target to the exec file.\n\
6272 Argument is a single section name (default: all loaded sections)."),
6275 add_cmd ("packet", class_maintenance
, packet_command
, _("\
6276 Send an arbitrary packet to a remote target.\n\
6277 maintenance packet TEXT\n\
6278 If GDB is talking to an inferior via the GDB serial protocol, then\n\
6279 this command sends the string TEXT to the inferior, and displays the\n\
6280 response packet. GDB supplies the initial `$' character, and the\n\
6281 terminating `#' character and checksum."),
6284 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
6285 Set whether to send break if interrupted."), _("\
6286 Show whether to send break if interrupted."), _("\
6287 If set, a break, instead of a cntrl-c, is sent to the remote target."),
6288 NULL
, NULL
, /* FIXME: i18n: Whether to send break if interrupted is %s. */
6289 &setlist
, &showlist
);
6291 /* Install commands for configuring memory read/write packets. */
6293 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
6294 Set the maximum number of bytes per memory write packet (deprecated)."),
6296 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
6297 Show the maximum number of bytes per memory write packet (deprecated)."),
6299 add_cmd ("memory-write-packet-size", no_class
,
6300 set_memory_write_packet_size
, _("\
6301 Set the maximum number of bytes per memory-write packet.\n\
6302 Specify the number of bytes in a packet or 0 (zero) for the\n\
6303 default packet size. The actual limit is further reduced\n\
6304 dependent on the target. Specify ``fixed'' to disable the\n\
6305 further restriction and ``limit'' to enable that restriction."),
6306 &remote_set_cmdlist
);
6307 add_cmd ("memory-read-packet-size", no_class
,
6308 set_memory_read_packet_size
, _("\
6309 Set the maximum number of bytes per memory-read packet.\n\
6310 Specify the number of bytes in a packet or 0 (zero) for the\n\
6311 default packet size. The actual limit is further reduced\n\
6312 dependent on the target. Specify ``fixed'' to disable the\n\
6313 further restriction and ``limit'' to enable that restriction."),
6314 &remote_set_cmdlist
);
6315 add_cmd ("memory-write-packet-size", no_class
,
6316 show_memory_write_packet_size
,
6317 _("Show the maximum number of bytes per memory-write packet."),
6318 &remote_show_cmdlist
);
6319 add_cmd ("memory-read-packet-size", no_class
,
6320 show_memory_read_packet_size
,
6321 _("Show the maximum number of bytes per memory-read packet."),
6322 &remote_show_cmdlist
);
6324 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
6325 &remote_hw_watchpoint_limit
, _("\
6326 Set the maximum number of target hardware watchpoints."), _("\
6327 Show the maximum number of target hardware watchpoints."), _("\
6328 Specify a negative limit for unlimited."),
6329 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
6330 &remote_set_cmdlist
, &remote_show_cmdlist
);
6331 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
6332 &remote_hw_breakpoint_limit
, _("\
6333 Set the maximum number of target hardware breakpoints."), _("\
6334 Show the maximum number of target hardware breakpoints."), _("\
6335 Specify a negative limit for unlimited."),
6336 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
6337 &remote_set_cmdlist
, &remote_show_cmdlist
);
6339 add_setshow_integer_cmd ("remoteaddresssize", class_obscure
,
6340 &remote_address_size
, _("\
6341 Set the maximum size of the address (in bits) in a memory packet."), _("\
6342 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
6344 NULL
, /* FIXME: i18n: */
6345 &setlist
, &showlist
);
6347 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
6348 "X", "binary-download", 1);
6350 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
6351 "vCont", "verbose-resume", 0);
6353 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
6354 "QPassSignals", "pass-signals", 0);
6356 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
6357 "qSymbol", "symbol-lookup", 0);
6359 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
6360 "P", "set-register", 1);
6362 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
6363 "p", "fetch-register", 1);
6365 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
6366 "Z0", "software-breakpoint", 0);
6368 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
6369 "Z1", "hardware-breakpoint", 0);
6371 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
6372 "Z2", "write-watchpoint", 0);
6374 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
6375 "Z3", "read-watchpoint", 0);
6377 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
6378 "Z4", "access-watchpoint", 0);
6380 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
6381 "qXfer:auxv:read", "read-aux-vector", 0);
6383 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
6384 "qXfer:memory-map:read", "memory-map", 0);
6386 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
6387 "qGetTLSAddr", "get-thread-local-storage-address",
6390 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
6391 "qSupported", "supported-packets", 0);
6393 /* Keep the old ``set remote Z-packet ...'' working. Each individual
6394 Z sub-packet has its own set and show commands, but users may
6395 have sets to this variable in their .gdbinit files (or in their
6397 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
6398 &remote_Z_packet_detect
, _("\
6399 Set use of remote protocol `Z' packets"), _("\
6400 Show use of remote protocol `Z' packets "), _("\
6401 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
6403 set_remote_protocol_Z_packet_cmd
,
6404 show_remote_protocol_Z_packet_cmd
, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
6405 &remote_set_cmdlist
, &remote_show_cmdlist
);
6407 /* Eventually initialize fileio. See fileio.c */
6408 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);