1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
4 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
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"
48 #include "target-descriptions.h"
53 #include "event-loop.h"
54 #include "event-top.h"
60 #include "gdbcore.h" /* for exec_bfd */
62 #include "remote-fileio.h"
64 #include "memory-map.h"
66 /* The size to align memory write packets, when practical. The protocol
67 does not guarantee any alignment, and gdb will generate short
68 writes and unaligned writes, but even as a best-effort attempt this
69 can improve bulk transfers. For instance, if a write is misaligned
70 relative to the target's data bus, the stub may need to make an extra
71 round trip fetching data from the target. This doesn't make a
72 huge difference, but it's easy to do, so we try to be helpful.
74 The alignment chosen is arbitrary; usually data bus width is
75 important here, not the possibly larger cache line size. */
76 enum { REMOTE_ALIGN_WRITES
= 16 };
78 /* Prototypes for local functions. */
79 static void cleanup_sigint_signal_handler (void *dummy
);
80 static void initialize_sigint_signal_handler (void);
81 static int getpkt_sane (char **buf
, long *sizeof_buf
, int forever
);
83 static void handle_remote_sigint (int);
84 static void handle_remote_sigint_twice (int);
85 static void async_remote_interrupt (gdb_client_data
);
86 void async_remote_interrupt_twice (gdb_client_data
);
88 static void build_remote_gdbarch_data (void);
90 static void remote_files_info (struct target_ops
*ignore
);
92 static void remote_prepare_to_store (struct regcache
*regcache
);
94 static void remote_fetch_registers (struct regcache
*regcache
, int regno
);
96 static void remote_resume (ptid_t ptid
, int step
,
97 enum target_signal siggnal
);
98 static void remote_async_resume (ptid_t ptid
, int step
,
99 enum target_signal siggnal
);
100 static void remote_open (char *name
, int from_tty
);
101 static void remote_async_open (char *name
, int from_tty
);
103 static void extended_remote_open (char *name
, int from_tty
);
104 static void extended_remote_async_open (char *name
, int from_tty
);
106 static void remote_open_1 (char *, int, struct target_ops
*, int extended_p
,
109 static void remote_close (int quitting
);
111 static void remote_store_registers (struct regcache
*regcache
, int regno
);
113 static void remote_mourn (void);
114 static void remote_async_mourn (void);
116 static void extended_remote_restart (void);
118 static void extended_remote_mourn (void);
120 static void remote_mourn_1 (struct target_ops
*);
122 static void remote_send (char **buf
, long *sizeof_buf_p
);
124 static int readchar (int timeout
);
126 static ptid_t
remote_wait (ptid_t ptid
,
127 struct target_waitstatus
*status
);
128 static ptid_t
remote_async_wait (ptid_t ptid
,
129 struct target_waitstatus
*status
);
131 static void remote_kill (void);
132 static void remote_async_kill (void);
134 static int tohex (int nib
);
136 static void remote_detach (char *args
, int from_tty
);
138 static void remote_interrupt (int signo
);
140 static void remote_interrupt_twice (int signo
);
142 static void interrupt_query (void);
144 static void set_thread (int, int);
146 static int remote_thread_alive (ptid_t
);
148 static void get_offsets (void);
150 static void skip_frame (void);
152 static long read_frame (char **buf_p
, long *sizeof_buf
);
154 static int hexnumlen (ULONGEST num
);
156 static void init_remote_ops (void);
158 static void init_extended_remote_ops (void);
160 static void remote_stop (void);
162 static int ishex (int ch
, int *val
);
164 static int stubhex (int ch
);
166 static int hexnumstr (char *, ULONGEST
);
168 static int hexnumnstr (char *, ULONGEST
, int);
170 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
172 static void print_packet (char *);
174 static unsigned long crc32 (unsigned char *, int, unsigned int);
176 static void compare_sections_command (char *, int);
178 static void packet_command (char *, int);
180 static int stub_unpack_int (char *buff
, int fieldlength
);
182 static ptid_t
remote_current_thread (ptid_t oldptid
);
184 static void remote_find_new_threads (void);
186 static void record_currthread (int currthread
);
188 static int fromhex (int a
);
190 static int hex2bin (const char *hex
, gdb_byte
*bin
, int count
);
192 static int bin2hex (const gdb_byte
*bin
, char *hex
, int count
);
194 static int putpkt_binary (char *buf
, int cnt
);
196 static void check_binary_download (CORE_ADDR addr
);
198 struct packet_config
;
200 static void show_packet_config_cmd (struct packet_config
*config
);
202 static void update_packet_config (struct packet_config
*config
);
204 static void set_remote_protocol_packet_cmd (char *args
, int from_tty
,
205 struct cmd_list_element
*c
);
207 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
209 struct cmd_list_element
*c
,
212 void _initialize_remote (void);
214 /* For "set remote" and "show remote". */
216 static struct cmd_list_element
*remote_set_cmdlist
;
217 static struct cmd_list_element
*remote_show_cmdlist
;
219 /* Description of the remote protocol state for the currently
220 connected target. This is per-target state, and independent of the
221 selected architecture. */
225 /* A buffer to use for incoming packets, and its current size. The
226 buffer is grown dynamically for larger incoming packets.
227 Outgoing packets may also be constructed in this buffer.
228 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
229 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
234 /* If we negotiated packet size explicitly (and thus can bypass
235 heuristics for the largest packet size that will not overflow
236 a buffer in the stub), this will be set to that packet size.
237 Otherwise zero, meaning to use the guessed size. */
238 long explicit_packet_size
;
241 /* This data could be associated with a target, but we do not always
242 have access to the current target when we need it, so for now it is
243 static. This will be fine for as long as only one target is in use
245 static struct remote_state remote_state
;
247 static struct remote_state
*
248 get_remote_state_raw (void)
250 return &remote_state
;
253 /* Description of the remote protocol for a given architecture. */
257 long offset
; /* Offset into G packet. */
258 long regnum
; /* GDB's internal register number. */
259 LONGEST pnum
; /* Remote protocol register number. */
260 int in_g_packet
; /* Always part of G packet. */
261 /* long size in bytes; == register_size (current_gdbarch, regnum);
263 /* char *name; == REGISTER_NAME (regnum); at present. */
266 struct remote_arch_state
268 /* Description of the remote protocol registers. */
269 long sizeof_g_packet
;
271 /* Description of the remote protocol registers indexed by REGNUM
272 (making an array NUM_REGS in size). */
273 struct packet_reg
*regs
;
275 /* This is the size (in chars) of the first response to the ``g''
276 packet. It is used as a heuristic when determining the maximum
277 size of memory-read and memory-write packets. A target will
278 typically only reserve a buffer large enough to hold the ``g''
279 packet. The size does not include packet overhead (headers and
281 long actual_register_packet_size
;
283 /* This is the maximum size (in chars) of a non read/write packet.
284 It is also used as a cap on the size of read/write packets. */
285 long remote_packet_size
;
289 /* Handle for retreving the remote protocol data from gdbarch. */
290 static struct gdbarch_data
*remote_gdbarch_data_handle
;
292 static struct remote_arch_state
*
293 get_remote_arch_state (void)
295 return gdbarch_data (current_gdbarch
, remote_gdbarch_data_handle
);
298 /* Fetch the global remote target state. */
300 static struct remote_state
*
301 get_remote_state (void)
303 /* Make sure that the remote architecture state has been
304 initialized, because doing so might reallocate rs->buf. Any
305 function which calls getpkt also needs to be mindful of changes
306 to rs->buf, but this call limits the number of places which run
308 get_remote_arch_state ();
310 return get_remote_state_raw ();
314 compare_pnums (const void *lhs_
, const void *rhs_
)
316 const struct packet_reg
* const *lhs
= lhs_
;
317 const struct packet_reg
* const *rhs
= rhs_
;
319 if ((*lhs
)->pnum
< (*rhs
)->pnum
)
321 else if ((*lhs
)->pnum
== (*rhs
)->pnum
)
328 init_remote_state (struct gdbarch
*gdbarch
)
330 int regnum
, num_remote_regs
, offset
;
331 struct remote_state
*rs
= get_remote_state_raw ();
332 struct remote_arch_state
*rsa
;
333 struct packet_reg
**remote_regs
;
335 rsa
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_arch_state
);
337 /* Use the architecture to build a regnum<->pnum table, which will be
338 1:1 unless a feature set specifies otherwise. */
339 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
, NUM_REGS
, struct packet_reg
);
340 for (regnum
= 0; regnum
< NUM_REGS
; regnum
++)
342 struct packet_reg
*r
= &rsa
->regs
[regnum
];
344 if (register_size (current_gdbarch
, regnum
) == 0)
345 /* Do not try to fetch zero-sized (placeholder) registers. */
348 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
353 /* Define the g/G packet format as the contents of each register
354 with a remote protocol number, in order of ascending protocol
357 remote_regs
= alloca (NUM_REGS
* sizeof (struct packet_reg
*));
358 for (num_remote_regs
= 0, regnum
= 0; regnum
< NUM_REGS
; regnum
++)
359 if (rsa
->regs
[regnum
].pnum
!= -1)
360 remote_regs
[num_remote_regs
++] = &rsa
->regs
[regnum
];
362 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
365 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
367 remote_regs
[regnum
]->in_g_packet
= 1;
368 remote_regs
[regnum
]->offset
= offset
;
369 offset
+= register_size (current_gdbarch
, remote_regs
[regnum
]->regnum
);
372 /* Record the maximum possible size of the g packet - it may turn out
374 rsa
->sizeof_g_packet
= offset
;
376 /* Default maximum number of characters in a packet body. Many
377 remote stubs have a hardwired buffer size of 400 bytes
378 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
379 as the maximum packet-size to ensure that the packet and an extra
380 NUL character can always fit in the buffer. This stops GDB
381 trashing stubs that try to squeeze an extra NUL into what is
382 already a full buffer (As of 1999-12-04 that was most stubs). */
383 rsa
->remote_packet_size
= 400 - 1;
385 /* This one is filled in when a ``g'' packet is received. */
386 rsa
->actual_register_packet_size
= 0;
388 /* Should rsa->sizeof_g_packet needs more space than the
389 default, adjust the size accordingly. Remember that each byte is
390 encoded as two characters. 32 is the overhead for the packet
391 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
392 (``$NN:G...#NN'') is a better guess, the below has been padded a
394 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
395 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
397 /* Make sure that the packet buffer is plenty big enough for
398 this architecture. */
399 if (rs
->buf_size
< rsa
->remote_packet_size
)
401 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
402 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
408 /* Return the current allowed size of a remote packet. This is
409 inferred from the current architecture, and should be used to
410 limit the length of outgoing packets. */
412 get_remote_packet_size (void)
414 struct remote_state
*rs
= get_remote_state ();
415 struct remote_arch_state
*rsa
= get_remote_arch_state ();
417 if (rs
->explicit_packet_size
)
418 return rs
->explicit_packet_size
;
420 return rsa
->remote_packet_size
;
423 static struct packet_reg
*
424 packet_reg_from_regnum (struct remote_arch_state
*rsa
, long regnum
)
426 if (regnum
< 0 && regnum
>= NUM_REGS
)
430 struct packet_reg
*r
= &rsa
->regs
[regnum
];
431 gdb_assert (r
->regnum
== regnum
);
436 static struct packet_reg
*
437 packet_reg_from_pnum (struct remote_arch_state
*rsa
, LONGEST pnum
)
440 for (i
= 0; i
< NUM_REGS
; i
++)
442 struct packet_reg
*r
= &rsa
->regs
[i
];
449 /* FIXME: graces/2002-08-08: These variables should eventually be
450 bound to an instance of the target object (as in gdbarch-tdep()),
451 when such a thing exists. */
453 /* This is set to the data address of the access causing the target
454 to stop for a watchpoint. */
455 static CORE_ADDR remote_watch_data_address
;
457 /* This is non-zero if target stopped for a watchpoint. */
458 static int remote_stopped_by_watchpoint_p
;
460 static struct target_ops remote_ops
;
462 static struct target_ops extended_remote_ops
;
464 /* Temporary target ops. Just like the remote_ops and
465 extended_remote_ops, but with asynchronous support. */
466 static struct target_ops remote_async_ops
;
468 static struct target_ops extended_async_remote_ops
;
470 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
471 ``forever'' still use the normal timeout mechanism. This is
472 currently used by the ASYNC code to guarentee that target reads
473 during the initial connect always time-out. Once getpkt has been
474 modified to return a timeout indication and, in turn
475 remote_wait()/wait_for_inferior() have gained a timeout parameter
477 static int wait_forever_enabled_p
= 1;
480 /* This variable chooses whether to send a ^C or a break when the user
481 requests program interruption. Although ^C is usually what remote
482 systems expect, and that is the default here, sometimes a break is
483 preferable instead. */
485 static int remote_break
;
487 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
488 remote_open knows that we don't have a file open when the program
490 static struct serial
*remote_desc
= NULL
;
492 /* This variable sets the number of bits in an address that are to be
493 sent in a memory ("M" or "m") packet. Normally, after stripping
494 leading zeros, the entire address would be sent. This variable
495 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
496 initial implementation of remote.c restricted the address sent in
497 memory packets to ``host::sizeof long'' bytes - (typically 32
498 bits). Consequently, for 64 bit targets, the upper 32 bits of an
499 address was never sent. Since fixing this bug may cause a break in
500 some remote targets this variable is principly provided to
501 facilitate backward compatibility. */
503 static int remote_address_size
;
505 /* Tempoary to track who currently owns the terminal. See
506 target_async_terminal_* for more details. */
508 static int remote_async_terminal_ours_p
;
511 /* User configurable variables for the number of characters in a
512 memory read/write packet. MIN (rsa->remote_packet_size,
513 rsa->sizeof_g_packet) is the default. Some targets need smaller
514 values (fifo overruns, et.al.) and some users need larger values
515 (speed up transfers). The variables ``preferred_*'' (the user
516 request), ``current_*'' (what was actually set) and ``forced_*''
517 (Positive - a soft limit, negative - a hard limit). */
519 struct memory_packet_config
526 /* Compute the current size of a read/write packet. Since this makes
527 use of ``actual_register_packet_size'' the computation is dynamic. */
530 get_memory_packet_size (struct memory_packet_config
*config
)
532 struct remote_state
*rs
= get_remote_state ();
533 struct remote_arch_state
*rsa
= get_remote_arch_state ();
535 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
536 law?) that some hosts don't cope very well with large alloca()
537 calls. Eventually the alloca() code will be replaced by calls to
538 xmalloc() and make_cleanups() allowing this restriction to either
539 be lifted or removed. */
540 #ifndef MAX_REMOTE_PACKET_SIZE
541 #define MAX_REMOTE_PACKET_SIZE 16384
543 /* NOTE: 20 ensures we can write at least one byte. */
544 #ifndef MIN_REMOTE_PACKET_SIZE
545 #define MIN_REMOTE_PACKET_SIZE 20
550 if (config
->size
<= 0)
551 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
553 what_they_get
= config
->size
;
557 what_they_get
= get_remote_packet_size ();
558 /* Limit the packet to the size specified by the user. */
560 && what_they_get
> config
->size
)
561 what_they_get
= config
->size
;
563 /* Limit it to the size of the targets ``g'' response unless we have
564 permission from the stub to use a larger packet size. */
565 if (rs
->explicit_packet_size
== 0
566 && rsa
->actual_register_packet_size
> 0
567 && what_they_get
> rsa
->actual_register_packet_size
)
568 what_they_get
= rsa
->actual_register_packet_size
;
570 if (what_they_get
> MAX_REMOTE_PACKET_SIZE
)
571 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
572 if (what_they_get
< MIN_REMOTE_PACKET_SIZE
)
573 what_they_get
= MIN_REMOTE_PACKET_SIZE
;
575 /* Make sure there is room in the global buffer for this packet
576 (including its trailing NUL byte). */
577 if (rs
->buf_size
< what_they_get
+ 1)
579 rs
->buf_size
= 2 * what_they_get
;
580 rs
->buf
= xrealloc (rs
->buf
, 2 * what_they_get
);
583 return what_they_get
;
586 /* Update the size of a read/write packet. If they user wants
587 something really big then do a sanity check. */
590 set_memory_packet_size (char *args
, struct memory_packet_config
*config
)
592 int fixed_p
= config
->fixed_p
;
593 long size
= config
->size
;
595 error (_("Argument required (integer, `fixed' or `limited')."));
596 else if (strcmp (args
, "hard") == 0
597 || strcmp (args
, "fixed") == 0)
599 else if (strcmp (args
, "soft") == 0
600 || strcmp (args
, "limit") == 0)
605 size
= strtoul (args
, &end
, 0);
607 error (_("Invalid %s (bad syntax)."), config
->name
);
609 /* Instead of explicitly capping the size of a packet to
610 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
611 instead allowed to set the size to something arbitrarily
613 if (size
> MAX_REMOTE_PACKET_SIZE
)
614 error (_("Invalid %s (too large)."), config
->name
);
618 if (fixed_p
&& !config
->fixed_p
)
620 if (! query (_("The target may not be able to correctly handle a %s\n"
621 "of %ld bytes. Change the packet size? "),
623 error (_("Packet size not changed."));
625 /* Update the config. */
626 config
->fixed_p
= fixed_p
;
631 show_memory_packet_size (struct memory_packet_config
*config
)
633 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
635 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
636 get_memory_packet_size (config
));
638 printf_filtered (_("Packets are limited to %ld bytes.\n"),
639 get_memory_packet_size (config
));
642 static struct memory_packet_config memory_write_packet_config
=
644 "memory-write-packet-size",
648 set_memory_write_packet_size (char *args
, int from_tty
)
650 set_memory_packet_size (args
, &memory_write_packet_config
);
654 show_memory_write_packet_size (char *args
, int from_tty
)
656 show_memory_packet_size (&memory_write_packet_config
);
660 get_memory_write_packet_size (void)
662 return get_memory_packet_size (&memory_write_packet_config
);
665 static struct memory_packet_config memory_read_packet_config
=
667 "memory-read-packet-size",
671 set_memory_read_packet_size (char *args
, int from_tty
)
673 set_memory_packet_size (args
, &memory_read_packet_config
);
677 show_memory_read_packet_size (char *args
, int from_tty
)
679 show_memory_packet_size (&memory_read_packet_config
);
683 get_memory_read_packet_size (void)
685 long size
= get_memory_packet_size (&memory_read_packet_config
);
686 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
687 extra buffer size argument before the memory read size can be
688 increased beyond this. */
689 if (size
> get_remote_packet_size ())
690 size
= get_remote_packet_size ();
695 /* Generic configuration support for packets the stub optionally
696 supports. Allows the user to specify the use of the packet as well
697 as allowing GDB to auto-detect support in the remote stub. */
701 PACKET_SUPPORT_UNKNOWN
= 0,
710 enum auto_boolean detect
;
711 enum packet_support support
;
714 /* Analyze a packet's return value and update the packet config
725 update_packet_config (struct packet_config
*config
)
727 switch (config
->detect
)
729 case AUTO_BOOLEAN_TRUE
:
730 config
->support
= PACKET_ENABLE
;
732 case AUTO_BOOLEAN_FALSE
:
733 config
->support
= PACKET_DISABLE
;
735 case AUTO_BOOLEAN_AUTO
:
736 config
->support
= PACKET_SUPPORT_UNKNOWN
;
742 show_packet_config_cmd (struct packet_config
*config
)
744 char *support
= "internal-error";
745 switch (config
->support
)
751 support
= "disabled";
753 case PACKET_SUPPORT_UNKNOWN
:
757 switch (config
->detect
)
759 case AUTO_BOOLEAN_AUTO
:
760 printf_filtered (_("Support for the `%s' packet is auto-detected, currently %s.\n"),
761 config
->name
, support
);
763 case AUTO_BOOLEAN_TRUE
:
764 case AUTO_BOOLEAN_FALSE
:
765 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
766 config
->name
, support
);
772 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
773 const char *title
, int legacy
)
780 config
->title
= title
;
781 config
->detect
= AUTO_BOOLEAN_AUTO
;
782 config
->support
= PACKET_SUPPORT_UNKNOWN
;
783 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
785 show_doc
= xstrprintf ("Show current use of remote protocol `%s' (%s) packet",
787 /* set/show TITLE-packet {auto,on,off} */
788 cmd_name
= xstrprintf ("%s-packet", title
);
789 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
790 &config
->detect
, set_doc
, show_doc
, NULL
, /* help_doc */
791 set_remote_protocol_packet_cmd
,
792 show_remote_protocol_packet_cmd
,
793 &remote_set_cmdlist
, &remote_show_cmdlist
);
794 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
798 legacy_name
= xstrprintf ("%s-packet", name
);
799 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
800 &remote_set_cmdlist
);
801 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
802 &remote_show_cmdlist
);
806 static enum packet_result
807 packet_check_result (const char *buf
)
811 /* The stub recognized the packet request. Check that the
812 operation succeeded. */
814 && isxdigit (buf
[1]) && isxdigit (buf
[2])
816 /* "Enn" - definitly an error. */
819 /* Always treat "E." as an error. This will be used for
820 more verbose error messages, such as E.memtypes. */
821 if (buf
[0] == 'E' && buf
[1] == '.')
824 /* The packet may or may not be OK. Just assume it is. */
828 /* The stub does not support the packet. */
829 return PACKET_UNKNOWN
;
832 static enum packet_result
833 packet_ok (const char *buf
, struct packet_config
*config
)
835 enum packet_result result
;
837 result
= packet_check_result (buf
);
842 /* The stub recognized the packet request. */
843 switch (config
->support
)
845 case PACKET_SUPPORT_UNKNOWN
:
847 fprintf_unfiltered (gdb_stdlog
,
848 "Packet %s (%s) is supported\n",
849 config
->name
, config
->title
);
850 config
->support
= PACKET_ENABLE
;
853 internal_error (__FILE__
, __LINE__
,
854 _("packet_ok: attempt to use a disabled packet"));
861 /* The stub does not support the packet. */
862 switch (config
->support
)
865 if (config
->detect
== AUTO_BOOLEAN_AUTO
)
866 /* If the stub previously indicated that the packet was
867 supported then there is a protocol error.. */
868 error (_("Protocol error: %s (%s) conflicting enabled responses."),
869 config
->name
, config
->title
);
871 /* The user set it wrong. */
872 error (_("Enabled packet %s (%s) not recognized by stub"),
873 config
->name
, config
->title
);
875 case PACKET_SUPPORT_UNKNOWN
:
877 fprintf_unfiltered (gdb_stdlog
,
878 "Packet %s (%s) is NOT supported\n",
879 config
->name
, config
->title
);
880 config
->support
= PACKET_DISABLE
;
903 PACKET_qXfer_features
,
904 PACKET_qXfer_memory_map
,
911 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
914 set_remote_protocol_packet_cmd (char *args
, int from_tty
,
915 struct cmd_list_element
*c
)
917 struct packet_config
*packet
;
919 for (packet
= remote_protocol_packets
;
920 packet
< &remote_protocol_packets
[PACKET_MAX
];
923 if (&packet
->detect
== c
->var
)
925 update_packet_config (packet
);
929 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
934 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
935 struct cmd_list_element
*c
,
938 struct packet_config
*packet
;
940 for (packet
= remote_protocol_packets
;
941 packet
< &remote_protocol_packets
[PACKET_MAX
];
944 if (&packet
->detect
== c
->var
)
946 show_packet_config_cmd (packet
);
950 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
954 /* Should we try one of the 'Z' requests? */
958 Z_PACKET_SOFTWARE_BP
,
959 Z_PACKET_HARDWARE_BP
,
966 /* For compatibility with older distributions. Provide a ``set remote
967 Z-packet ...'' command that updates all the Z packet types. */
969 static enum auto_boolean remote_Z_packet_detect
;
972 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
973 struct cmd_list_element
*c
)
976 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
978 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
979 update_packet_config (&remote_protocol_packets
[PACKET_Z0
+ i
]);
984 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
985 struct cmd_list_element
*c
,
989 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
991 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
995 /* Should we try the 'ThreadInfo' query packet?
997 This variable (NOT available to the user: auto-detect only!)
998 determines whether GDB will use the new, simpler "ThreadInfo"
999 query or the older, more complex syntax for thread queries.
1000 This is an auto-detect variable (set to true at each connect,
1001 and set to false when the target fails to recognize it). */
1003 static int use_threadinfo_query
;
1004 static int use_threadextra_query
;
1006 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1007 static struct async_signal_handler
*sigint_remote_twice_token
;
1008 static struct async_signal_handler
*sigint_remote_token
;
1010 /* These are pointers to hook functions that may be set in order to
1011 modify resume/wait behavior for a particular architecture. */
1013 void (*deprecated_target_resume_hook
) (void);
1014 void (*deprecated_target_wait_loop_hook
) (void);
1018 /* These are the threads which we last sent to the remote system.
1019 -1 for all or -2 for not sent yet. */
1020 static int general_thread
;
1021 static int continue_thread
;
1023 /* Call this function as a result of
1024 1) A halt indication (T packet) containing a thread id
1025 2) A direct query of currthread
1026 3) Successful execution of set thread
1030 record_currthread (int currthread
)
1032 general_thread
= currthread
;
1034 /* If this is a new thread, add it to GDB's thread list.
1035 If we leave it up to WFI to do this, bad things will happen. */
1036 if (!in_thread_list (pid_to_ptid (currthread
)))
1038 add_thread (pid_to_ptid (currthread
));
1039 ui_out_text (uiout
, "[New ");
1040 ui_out_text (uiout
, target_pid_to_str (pid_to_ptid (currthread
)));
1041 ui_out_text (uiout
, "]\n");
1045 static char *last_pass_packet
;
1047 /* If 'QPassSignals' is supported, tell the remote stub what signals
1048 it can simply pass through to the inferior without reporting. */
1051 remote_pass_signals (void)
1053 if (remote_protocol_packets
[PACKET_QPassSignals
].support
!= PACKET_DISABLE
)
1055 char *pass_packet
, *p
;
1056 int numsigs
= (int) TARGET_SIGNAL_LAST
;
1059 gdb_assert (numsigs
< 256);
1060 for (i
= 0; i
< numsigs
; i
++)
1062 if (signal_stop_state (i
) == 0
1063 && signal_print_state (i
) == 0
1064 && signal_pass_state (i
) == 1)
1067 pass_packet
= xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
1068 strcpy (pass_packet
, "QPassSignals:");
1069 p
= pass_packet
+ strlen (pass_packet
);
1070 for (i
= 0; i
< numsigs
; i
++)
1072 if (signal_stop_state (i
) == 0
1073 && signal_print_state (i
) == 0
1074 && signal_pass_state (i
) == 1)
1077 *p
++ = tohex (i
>> 4);
1078 *p
++ = tohex (i
& 15);
1087 if (!last_pass_packet
|| strcmp (last_pass_packet
, pass_packet
))
1089 struct remote_state
*rs
= get_remote_state ();
1090 char *buf
= rs
->buf
;
1092 putpkt (pass_packet
);
1093 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1094 packet_ok (buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
1095 if (last_pass_packet
)
1096 xfree (last_pass_packet
);
1097 last_pass_packet
= pass_packet
;
1100 xfree (pass_packet
);
1104 #define MAGIC_NULL_PID 42000
1107 set_thread (int th
, int gen
)
1109 struct remote_state
*rs
= get_remote_state ();
1110 char *buf
= rs
->buf
;
1111 int state
= gen
? general_thread
: continue_thread
;
1117 buf
[1] = gen
? 'g' : 'c';
1118 if (th
== MAGIC_NULL_PID
)
1124 xsnprintf (&buf
[2], get_remote_packet_size () - 2, "-%x", -th
);
1126 xsnprintf (&buf
[2], get_remote_packet_size () - 2, "%x", th
);
1128 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1130 general_thread
= th
;
1132 continue_thread
= th
;
1135 /* Return nonzero if the thread TH is still alive on the remote system. */
1138 remote_thread_alive (ptid_t ptid
)
1140 struct remote_state
*rs
= get_remote_state ();
1141 int tid
= PIDGET (ptid
);
1144 xsnprintf (rs
->buf
, get_remote_packet_size (), "T-%08x", -tid
);
1146 xsnprintf (rs
->buf
, get_remote_packet_size (), "T%08x", tid
);
1148 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1149 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
1152 /* About these extended threadlist and threadinfo packets. They are
1153 variable length packets but, the fields within them are often fixed
1154 length. They are redundent enough to send over UDP as is the
1155 remote protocol in general. There is a matching unit test module
1158 #define OPAQUETHREADBYTES 8
1160 /* a 64 bit opaque identifier */
1161 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
1163 /* WARNING: This threadref data structure comes from the remote O.S.,
1164 libstub protocol encoding, and remote.c. it is not particularly
1167 /* Right now, the internal structure is int. We want it to be bigger.
1171 typedef int gdb_threadref
; /* Internal GDB thread reference. */
1173 /* gdb_ext_thread_info is an internal GDB data structure which is
1174 equivalent to the reply of the remote threadinfo packet. */
1176 struct gdb_ext_thread_info
1178 threadref threadid
; /* External form of thread reference. */
1179 int active
; /* Has state interesting to GDB?
1181 char display
[256]; /* Brief state display, name,
1182 blocked/suspended. */
1183 char shortname
[32]; /* To be used to name threads. */
1184 char more_display
[256]; /* Long info, statistics, queue depth,
1188 /* The volume of remote transfers can be limited by submitting
1189 a mask containing bits specifying the desired information.
1190 Use a union of these values as the 'selection' parameter to
1191 get_thread_info. FIXME: Make these TAG names more thread specific.
1194 #define TAG_THREADID 1
1195 #define TAG_EXISTS 2
1196 #define TAG_DISPLAY 4
1197 #define TAG_THREADNAME 8
1198 #define TAG_MOREDISPLAY 16
1200 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1202 char *unpack_varlen_hex (char *buff
, ULONGEST
*result
);
1204 static char *unpack_nibble (char *buf
, int *val
);
1206 static char *pack_nibble (char *buf
, int nibble
);
1208 static char *pack_hex_byte (char *pkt
, int /* unsigned char */ byte
);
1210 static char *unpack_byte (char *buf
, int *value
);
1212 static char *pack_int (char *buf
, int value
);
1214 static char *unpack_int (char *buf
, int *value
);
1216 static char *unpack_string (char *src
, char *dest
, int length
);
1218 static char *pack_threadid (char *pkt
, threadref
*id
);
1220 static char *unpack_threadid (char *inbuf
, threadref
*id
);
1222 void int_to_threadref (threadref
*id
, int value
);
1224 static int threadref_to_int (threadref
*ref
);
1226 static void copy_threadref (threadref
*dest
, threadref
*src
);
1228 static int threadmatch (threadref
*dest
, threadref
*src
);
1230 static char *pack_threadinfo_request (char *pkt
, int mode
,
1233 static int remote_unpack_thread_info_response (char *pkt
,
1234 threadref
*expectedref
,
1235 struct gdb_ext_thread_info
1239 static int remote_get_threadinfo (threadref
*threadid
,
1240 int fieldset
, /*TAG mask */
1241 struct gdb_ext_thread_info
*info
);
1243 static char *pack_threadlist_request (char *pkt
, int startflag
,
1245 threadref
*nextthread
);
1247 static int parse_threadlist_response (char *pkt
,
1249 threadref
*original_echo
,
1250 threadref
*resultlist
,
1253 static int remote_get_threadlist (int startflag
,
1254 threadref
*nextthread
,
1258 threadref
*threadlist
);
1260 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
1262 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
1263 void *context
, int looplimit
);
1265 static int remote_newthread_step (threadref
*ref
, void *context
);
1267 /* Encode 64 bits in 16 chars of hex. */
1269 static const char hexchars
[] = "0123456789abcdef";
1272 ishex (int ch
, int *val
)
1274 if ((ch
>= 'a') && (ch
<= 'f'))
1276 *val
= ch
- 'a' + 10;
1279 if ((ch
>= 'A') && (ch
<= 'F'))
1281 *val
= ch
- 'A' + 10;
1284 if ((ch
>= '0') && (ch
<= '9'))
1295 if (ch
>= 'a' && ch
<= 'f')
1296 return ch
- 'a' + 10;
1297 if (ch
>= '0' && ch
<= '9')
1299 if (ch
>= 'A' && ch
<= 'F')
1300 return ch
- 'A' + 10;
1305 stub_unpack_int (char *buff
, int fieldlength
)
1312 nibble
= stubhex (*buff
++);
1316 retval
= retval
<< 4;
1322 unpack_varlen_hex (char *buff
, /* packet to parse */
1326 ULONGEST retval
= 0;
1328 while (ishex (*buff
, &nibble
))
1331 retval
= retval
<< 4;
1332 retval
|= nibble
& 0x0f;
1339 unpack_nibble (char *buf
, int *val
)
1341 ishex (*buf
++, val
);
1346 pack_nibble (char *buf
, int nibble
)
1348 *buf
++ = hexchars
[(nibble
& 0x0f)];
1353 pack_hex_byte (char *pkt
, int byte
)
1355 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
1356 *pkt
++ = hexchars
[(byte
& 0xf)];
1361 unpack_byte (char *buf
, int *value
)
1363 *value
= stub_unpack_int (buf
, 2);
1368 pack_int (char *buf
, int value
)
1370 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
1371 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
1372 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
1373 buf
= pack_hex_byte (buf
, (value
& 0xff));
1378 unpack_int (char *buf
, int *value
)
1380 *value
= stub_unpack_int (buf
, 8);
1384 #if 0 /* Currently unused, uncomment when needed. */
1385 static char *pack_string (char *pkt
, char *string
);
1388 pack_string (char *pkt
, char *string
)
1393 len
= strlen (string
);
1395 len
= 200; /* Bigger than most GDB packets, junk??? */
1396 pkt
= pack_hex_byte (pkt
, len
);
1400 if ((ch
== '\0') || (ch
== '#'))
1401 ch
= '*'; /* Protect encapsulation. */
1406 #endif /* 0 (unused) */
1409 unpack_string (char *src
, char *dest
, int length
)
1418 pack_threadid (char *pkt
, threadref
*id
)
1421 unsigned char *altid
;
1423 altid
= (unsigned char *) id
;
1424 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
1426 pkt
= pack_hex_byte (pkt
, *altid
++);
1432 unpack_threadid (char *inbuf
, threadref
*id
)
1435 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
1438 altref
= (char *) id
;
1440 while (inbuf
< limit
)
1442 x
= stubhex (*inbuf
++);
1443 y
= stubhex (*inbuf
++);
1444 *altref
++ = (x
<< 4) | y
;
1449 /* Externally, threadrefs are 64 bits but internally, they are still
1450 ints. This is due to a mismatch of specifications. We would like
1451 to use 64bit thread references internally. This is an adapter
1455 int_to_threadref (threadref
*id
, int value
)
1457 unsigned char *scan
;
1459 scan
= (unsigned char *) id
;
1465 *scan
++ = (value
>> 24) & 0xff;
1466 *scan
++ = (value
>> 16) & 0xff;
1467 *scan
++ = (value
>> 8) & 0xff;
1468 *scan
++ = (value
& 0xff);
1472 threadref_to_int (threadref
*ref
)
1475 unsigned char *scan
;
1481 value
= (value
<< 8) | ((*scan
++) & 0xff);
1486 copy_threadref (threadref
*dest
, threadref
*src
)
1489 unsigned char *csrc
, *cdest
;
1491 csrc
= (unsigned char *) src
;
1492 cdest
= (unsigned char *) dest
;
1499 threadmatch (threadref
*dest
, threadref
*src
)
1501 /* Things are broken right now, so just assume we got a match. */
1503 unsigned char *srcp
, *destp
;
1505 srcp
= (char *) src
;
1506 destp
= (char *) dest
;
1510 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
1517 threadid:1, # always request threadid
1524 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1527 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
1529 *pkt
++ = 'q'; /* Info Query */
1530 *pkt
++ = 'P'; /* process or thread info */
1531 pkt
= pack_int (pkt
, mode
); /* mode */
1532 pkt
= pack_threadid (pkt
, id
); /* threadid */
1533 *pkt
= '\0'; /* terminate */
1537 /* These values tag the fields in a thread info response packet. */
1538 /* Tagging the fields allows us to request specific fields and to
1539 add more fields as time goes by. */
1541 #define TAG_THREADID 1 /* Echo the thread identifier. */
1542 #define TAG_EXISTS 2 /* Is this process defined enough to
1543 fetch registers and its stack? */
1544 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1545 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
1546 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1550 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
1551 struct gdb_ext_thread_info
*info
)
1553 struct remote_state
*rs
= get_remote_state ();
1557 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
1560 /* info->threadid = 0; FIXME: implement zero_threadref. */
1562 info
->display
[0] = '\0';
1563 info
->shortname
[0] = '\0';
1564 info
->more_display
[0] = '\0';
1566 /* Assume the characters indicating the packet type have been
1568 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
1569 pkt
= unpack_threadid (pkt
, &ref
);
1572 warning (_("Incomplete response to threadinfo request."));
1573 if (!threadmatch (&ref
, expectedref
))
1574 { /* This is an answer to a different request. */
1575 warning (_("ERROR RMT Thread info mismatch."));
1578 copy_threadref (&info
->threadid
, &ref
);
1580 /* Loop on tagged fields , try to bail if somthing goes wrong. */
1582 /* Packets are terminated with nulls. */
1583 while ((pkt
< limit
) && mask
&& *pkt
)
1585 pkt
= unpack_int (pkt
, &tag
); /* tag */
1586 pkt
= unpack_byte (pkt
, &length
); /* length */
1587 if (!(tag
& mask
)) /* Tags out of synch with mask. */
1589 warning (_("ERROR RMT: threadinfo tag mismatch."));
1593 if (tag
== TAG_THREADID
)
1597 warning (_("ERROR RMT: length of threadid is not 16."));
1601 pkt
= unpack_threadid (pkt
, &ref
);
1602 mask
= mask
& ~TAG_THREADID
;
1605 if (tag
== TAG_EXISTS
)
1607 info
->active
= stub_unpack_int (pkt
, length
);
1609 mask
= mask
& ~(TAG_EXISTS
);
1612 warning (_("ERROR RMT: 'exists' length too long."));
1618 if (tag
== TAG_THREADNAME
)
1620 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
1621 mask
= mask
& ~TAG_THREADNAME
;
1624 if (tag
== TAG_DISPLAY
)
1626 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
1627 mask
= mask
& ~TAG_DISPLAY
;
1630 if (tag
== TAG_MOREDISPLAY
)
1632 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
1633 mask
= mask
& ~TAG_MOREDISPLAY
;
1636 warning (_("ERROR RMT: unknown thread info tag."));
1637 break; /* Not a tag we know about. */
1643 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
1644 struct gdb_ext_thread_info
*info
)
1646 struct remote_state
*rs
= get_remote_state ();
1649 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
1651 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1652 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
1657 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1660 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
1661 threadref
*nextthread
)
1663 *pkt
++ = 'q'; /* info query packet */
1664 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
1665 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
1666 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
1667 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
1672 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1675 parse_threadlist_response (char *pkt
, int result_limit
,
1676 threadref
*original_echo
, threadref
*resultlist
,
1679 struct remote_state
*rs
= get_remote_state ();
1681 int count
, resultcount
, done
;
1684 /* Assume the 'q' and 'M chars have been stripped. */
1685 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
1686 /* done parse past here */
1687 pkt
= unpack_byte (pkt
, &count
); /* count field */
1688 pkt
= unpack_nibble (pkt
, &done
);
1689 /* The first threadid is the argument threadid. */
1690 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
1691 while ((count
-- > 0) && (pkt
< limit
))
1693 pkt
= unpack_threadid (pkt
, resultlist
++);
1694 if (resultcount
++ >= result_limit
)
1703 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
1704 int *done
, int *result_count
, threadref
*threadlist
)
1706 struct remote_state
*rs
= get_remote_state ();
1707 static threadref echo_nextthread
;
1710 /* Trancate result limit to be smaller than the packet size. */
1711 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10) >= get_remote_packet_size ())
1712 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
1714 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
1716 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1719 parse_threadlist_response (rs
->buf
+ 2, result_limit
, &echo_nextthread
,
1722 if (!threadmatch (&echo_nextthread
, nextthread
))
1724 /* FIXME: This is a good reason to drop the packet. */
1725 /* Possably, there is a duplicate response. */
1727 retransmit immediatly - race conditions
1728 retransmit after timeout - yes
1730 wait for packet, then exit
1732 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
1733 return 0; /* I choose simply exiting. */
1735 if (*result_count
<= 0)
1739 warning (_("RMT ERROR : failed to get remote thread list."));
1742 return result
; /* break; */
1744 if (*result_count
> result_limit
)
1747 warning (_("RMT ERROR: threadlist response longer than requested."));
1753 /* This is the interface between remote and threads, remotes upper
1756 /* remote_find_new_threads retrieves the thread list and for each
1757 thread in the list, looks up the thread in GDB's internal list,
1758 ading the thread if it does not already exist. This involves
1759 getting partial thread lists from the remote target so, polling the
1760 quit_flag is required. */
1763 /* About this many threadisds fit in a packet. */
1765 #define MAXTHREADLISTRESULTS 32
1768 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
1771 int done
, i
, result_count
;
1775 static threadref nextthread
;
1776 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
1781 if (loopcount
++ > looplimit
)
1784 warning (_("Remote fetch threadlist -infinite loop-."));
1787 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
1788 &done
, &result_count
, resultthreadlist
))
1793 /* Clear for later iterations. */
1795 /* Setup to resume next batch of thread references, set nextthread. */
1796 if (result_count
>= 1)
1797 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
1799 while (result_count
--)
1800 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
1807 remote_newthread_step (threadref
*ref
, void *context
)
1811 ptid
= pid_to_ptid (threadref_to_int (ref
));
1813 if (!in_thread_list (ptid
))
1815 return 1; /* continue iterator */
1818 #define CRAZY_MAX_THREADS 1000
1821 remote_current_thread (ptid_t oldpid
)
1823 struct remote_state
*rs
= get_remote_state ();
1826 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1827 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
1828 /* Use strtoul here, so we'll correctly parse values whose highest
1829 bit is set. The protocol carries them as a simple series of
1830 hex digits; in the absence of a sign, strtol will see such
1831 values as positive numbers out of range for signed 'long', and
1832 return LONG_MAX to indicate an overflow. */
1833 return pid_to_ptid (strtoul (&rs
->buf
[2], NULL
, 16));
1838 /* Find new threads for info threads command.
1839 * Original version, using John Metzler's thread protocol.
1843 remote_find_new_threads (void)
1845 remote_threadlist_iterator (remote_newthread_step
, 0,
1847 if (PIDGET (inferior_ptid
) == MAGIC_NULL_PID
) /* ack ack ack */
1848 inferior_ptid
= remote_current_thread (inferior_ptid
);
1852 * Find all threads for info threads command.
1853 * Uses new thread protocol contributed by Cisco.
1854 * Falls back and attempts to use the older method (above)
1855 * if the target doesn't respond to the new method.
1859 remote_threads_info (void)
1861 struct remote_state
*rs
= get_remote_state ();
1865 if (remote_desc
== 0) /* paranoia */
1866 error (_("Command can only be used when connected to the remote target."));
1868 if (use_threadinfo_query
)
1870 putpkt ("qfThreadInfo");
1871 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1873 if (bufp
[0] != '\0') /* q packet recognized */
1875 while (*bufp
++ == 'm') /* reply contains one or more TID */
1879 /* Use strtoul here, so we'll correctly parse values
1880 whose highest bit is set. The protocol carries
1881 them as a simple series of hex digits; in the
1882 absence of a sign, strtol will see such values as
1883 positive numbers out of range for signed 'long',
1884 and return LONG_MAX to indicate an overflow. */
1885 tid
= strtoul (bufp
, &bufp
, 16);
1886 if (tid
!= 0 && !in_thread_list (pid_to_ptid (tid
)))
1887 add_thread (pid_to_ptid (tid
));
1889 while (*bufp
++ == ','); /* comma-separated list */
1890 putpkt ("qsThreadInfo");
1891 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1898 /* Else fall back to old method based on jmetzler protocol. */
1899 use_threadinfo_query
= 0;
1900 remote_find_new_threads ();
1905 * Collect a descriptive string about the given thread.
1906 * The target may say anything it wants to about the thread
1907 * (typically info about its blocked / runnable state, name, etc.).
1908 * This string will appear in the info threads display.
1910 * Optional: targets are not required to implement this function.
1914 remote_threads_extra_info (struct thread_info
*tp
)
1916 struct remote_state
*rs
= get_remote_state ();
1920 struct gdb_ext_thread_info threadinfo
;
1921 static char display_buf
[100]; /* arbitrary... */
1922 int n
= 0; /* position in display_buf */
1924 if (remote_desc
== 0) /* paranoia */
1925 internal_error (__FILE__
, __LINE__
,
1926 _("remote_threads_extra_info"));
1928 if (use_threadextra_query
)
1930 xsnprintf (rs
->buf
, get_remote_packet_size (), "qThreadExtraInfo,%x",
1933 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1934 if (rs
->buf
[0] != 0)
1936 n
= min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
1937 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
1938 display_buf
[result
] = '\0';
1943 /* If the above query fails, fall back to the old method. */
1944 use_threadextra_query
= 0;
1945 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
1946 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
1947 int_to_threadref (&id
, PIDGET (tp
->ptid
));
1948 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
1949 if (threadinfo
.active
)
1951 if (*threadinfo
.shortname
)
1952 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
1953 " Name: %s,", threadinfo
.shortname
);
1954 if (*threadinfo
.display
)
1955 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
1956 " State: %s,", threadinfo
.display
);
1957 if (*threadinfo
.more_display
)
1958 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
1959 " Priority: %s", threadinfo
.more_display
);
1963 /* For purely cosmetic reasons, clear up trailing commas. */
1964 if (',' == display_buf
[n
-1])
1965 display_buf
[n
-1] = ' ';
1973 /* Restart the remote side; this is an extended protocol operation. */
1976 extended_remote_restart (void)
1978 struct remote_state
*rs
= get_remote_state ();
1980 /* Send the restart command; for reasons I don't understand the
1981 remote side really expects a number after the "R". */
1982 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
1985 remote_fileio_reset ();
1987 /* Now query for status so this looks just like we restarted
1988 gdbserver from scratch. */
1990 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1993 /* Clean up connection to a remote debugger. */
1996 remote_close (int quitting
)
1999 serial_close (remote_desc
);
2003 /* Query the remote side for the text, data and bss offsets. */
2008 struct remote_state
*rs
= get_remote_state ();
2012 CORE_ADDR text_addr
, data_addr
, bss_addr
;
2013 struct section_offsets
*offs
;
2015 putpkt ("qOffsets");
2016 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2019 if (buf
[0] == '\000')
2020 return; /* Return silently. Stub doesn't support
2024 warning (_("Remote failure reply: %s"), buf
);
2028 /* Pick up each field in turn. This used to be done with scanf, but
2029 scanf will make trouble if CORE_ADDR size doesn't match
2030 conversion directives correctly. The following code will work
2031 with any size of CORE_ADDR. */
2032 text_addr
= data_addr
= bss_addr
= 0;
2036 if (strncmp (ptr
, "Text=", 5) == 0)
2039 /* Don't use strtol, could lose on big values. */
2040 while (*ptr
&& *ptr
!= ';')
2041 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2046 if (!lose
&& strncmp (ptr
, ";Data=", 6) == 0)
2049 while (*ptr
&& *ptr
!= ';')
2050 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2055 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
2058 while (*ptr
&& *ptr
!= ';')
2059 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
2065 error (_("Malformed response to offset query, %s"), buf
);
2067 if (symfile_objfile
== NULL
)
2070 offs
= ((struct section_offsets
*)
2071 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
2072 memcpy (offs
, symfile_objfile
->section_offsets
,
2073 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
2075 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
2077 /* This is a temporary kludge to force data and bss to use the same offsets
2078 because that's what nlmconv does now. The real solution requires changes
2079 to the stub and remote.c that I don't have time to do right now. */
2081 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
2082 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
2084 objfile_relocate (symfile_objfile
, offs
);
2087 /* Stub for catch_exception. */
2090 remote_start_remote (struct ui_out
*uiout
, void *from_tty_p
)
2092 int from_tty
= * (int *) from_tty_p
;
2094 immediate_quit
++; /* Allow user to interrupt it. */
2096 /* Ack any packet which the remote side has already sent. */
2097 serial_write (remote_desc
, "+", 1);
2099 /* Let the stub know that we want it to return the thread. */
2102 inferior_ptid
= remote_current_thread (inferior_ptid
);
2104 get_offsets (); /* Get text, data & bss offsets. */
2106 putpkt ("?"); /* Initiate a query from remote machine. */
2109 start_remote (from_tty
); /* Initialize gdb process mechanisms. */
2112 /* Open a connection to a remote debugger.
2113 NAME is the filename used for communication. */
2116 remote_open (char *name
, int from_tty
)
2118 remote_open_1 (name
, from_tty
, &remote_ops
, 0, 0);
2121 /* Just like remote_open, but with asynchronous support. */
2123 remote_async_open (char *name
, int from_tty
)
2125 remote_open_1 (name
, from_tty
, &remote_async_ops
, 0, 1);
2128 /* Open a connection to a remote debugger using the extended
2129 remote gdb protocol. NAME is the filename used for communication. */
2132 extended_remote_open (char *name
, int from_tty
)
2134 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */,
2138 /* Just like extended_remote_open, but with asynchronous support. */
2140 extended_remote_async_open (char *name
, int from_tty
)
2142 remote_open_1 (name
, from_tty
, &extended_async_remote_ops
,
2143 1 /*extended_p */, 1 /* async_p */);
2146 /* Generic code for opening a connection to a remote target. */
2149 init_all_packet_configs (void)
2152 for (i
= 0; i
< PACKET_MAX
; i
++)
2153 update_packet_config (&remote_protocol_packets
[i
]);
2156 /* Symbol look-up. */
2159 remote_check_symbols (struct objfile
*objfile
)
2161 struct remote_state
*rs
= get_remote_state ();
2162 char *msg
, *reply
, *tmp
;
2163 struct minimal_symbol
*sym
;
2166 if (remote_protocol_packets
[PACKET_qSymbol
].support
== PACKET_DISABLE
)
2169 /* Allocate a message buffer. We can't reuse the input buffer in RS,
2170 because we need both at the same time. */
2171 msg
= alloca (get_remote_packet_size ());
2173 /* Invite target to request symbol lookups. */
2175 putpkt ("qSymbol::");
2176 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2177 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSymbol
]);
2180 while (strncmp (reply
, "qSymbol:", 8) == 0)
2183 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
2185 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
2187 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
2189 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
2190 paddr_nz (SYMBOL_VALUE_ADDRESS (sym
)),
2193 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2198 static struct serial
*
2199 remote_serial_open (char *name
)
2201 static int udp_warning
= 0;
2203 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2204 of in ser-tcp.c, because it is the remote protocol assuming that the
2205 serial connection is reliable and not the serial connection promising
2207 if (!udp_warning
&& strncmp (name
, "udp:", 4) == 0)
2210 The remote protocol may be unreliable over UDP.\n\
2211 Some events may be lost, rendering further debugging impossible."));
2215 return serial_open (name
);
2218 /* This type describes each known response to the qSupported
2220 struct protocol_feature
2222 /* The name of this protocol feature. */
2225 /* The default for this protocol feature. */
2226 enum packet_support default_support
;
2228 /* The function to call when this feature is reported, or after
2229 qSupported processing if the feature is not supported.
2230 The first argument points to this structure. The second
2231 argument indicates whether the packet requested support be
2232 enabled, disabled, or probed (or the default, if this function
2233 is being called at the end of processing and this feature was
2234 not reported). The third argument may be NULL; if not NULL, it
2235 is a NUL-terminated string taken from the packet following
2236 this feature's name and an equals sign. */
2237 void (*func
) (const struct protocol_feature
*, enum packet_support
,
2240 /* The corresponding packet for this feature. Only used if
2241 FUNC is remote_supported_packet. */
2246 remote_supported_packet (const struct protocol_feature
*feature
,
2247 enum packet_support support
,
2248 const char *argument
)
2252 warning (_("Remote qSupported response supplied an unexpected value for"
2253 " \"%s\"."), feature
->name
);
2257 if (remote_protocol_packets
[feature
->packet
].support
2258 == PACKET_SUPPORT_UNKNOWN
)
2259 remote_protocol_packets
[feature
->packet
].support
= support
;
2263 remote_packet_size (const struct protocol_feature
*feature
,
2264 enum packet_support support
, const char *value
)
2266 struct remote_state
*rs
= get_remote_state ();
2271 if (support
!= PACKET_ENABLE
)
2274 if (value
== NULL
|| *value
== '\0')
2276 warning (_("Remote target reported \"%s\" without a size."),
2282 packet_size
= strtol (value
, &value_end
, 16);
2283 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
2285 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
2286 feature
->name
, value
);
2290 if (packet_size
> MAX_REMOTE_PACKET_SIZE
)
2292 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
2293 packet_size
, MAX_REMOTE_PACKET_SIZE
);
2294 packet_size
= MAX_REMOTE_PACKET_SIZE
;
2297 /* Record the new maximum packet size. */
2298 rs
->explicit_packet_size
= packet_size
;
2301 static struct protocol_feature remote_protocol_features
[] = {
2302 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
2303 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
2304 PACKET_qXfer_auxv
},
2305 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
2306 PACKET_qXfer_features
},
2307 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
2308 PACKET_qXfer_memory_map
},
2309 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
2310 PACKET_QPassSignals
},
2314 remote_query_supported (void)
2316 struct remote_state
*rs
= get_remote_state ();
2319 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
2321 /* The packet support flags are handled differently for this packet
2322 than for most others. We treat an error, a disabled packet, and
2323 an empty response identically: any features which must be reported
2324 to be used will be automatically disabled. An empty buffer
2325 accomplishes this, since that is also the representation for a list
2326 containing no features. */
2329 if (remote_protocol_packets
[PACKET_qSupported
].support
!= PACKET_DISABLE
)
2331 putpkt ("qSupported");
2332 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2334 /* If an error occured, warn, but do not return - just reset the
2335 buffer to empty and go on to disable features. */
2336 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
2339 warning (_("Remote failure reply: %s"), rs
->buf
);
2344 memset (seen
, 0, sizeof (seen
));
2349 enum packet_support is_supported
;
2350 char *p
, *end
, *name_end
, *value
;
2352 /* First separate out this item from the rest of the packet. If
2353 there's another item after this, we overwrite the separator
2354 (terminated strings are much easier to work with). */
2356 end
= strchr (p
, ';');
2359 end
= p
+ strlen (p
);
2369 warning (_("empty item in \"qSupported\" response"));
2374 name_end
= strchr (p
, '=');
2377 /* This is a name=value entry. */
2378 is_supported
= PACKET_ENABLE
;
2379 value
= name_end
+ 1;
2388 is_supported
= PACKET_ENABLE
;
2392 is_supported
= PACKET_DISABLE
;
2396 is_supported
= PACKET_SUPPORT_UNKNOWN
;
2400 warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p
);
2406 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
2407 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
2409 const struct protocol_feature
*feature
;
2412 feature
= &remote_protocol_features
[i
];
2413 feature
->func (feature
, is_supported
, value
);
2418 /* If we increased the packet size, make sure to increase the global
2419 buffer size also. We delay this until after parsing the entire
2420 qSupported packet, because this is the same buffer we were
2422 if (rs
->buf_size
< rs
->explicit_packet_size
)
2424 rs
->buf_size
= rs
->explicit_packet_size
;
2425 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
2428 /* Handle the defaults for unmentioned features. */
2429 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
2432 const struct protocol_feature
*feature
;
2434 feature
= &remote_protocol_features
[i
];
2435 feature
->func (feature
, feature
->default_support
, NULL
);
2441 remote_open_1 (char *name
, int from_tty
, struct target_ops
*target
,
2442 int extended_p
, int async_p
)
2444 struct remote_state
*rs
= get_remote_state ();
2446 error (_("To open a remote debug connection, you need to specify what\n"
2447 "serial device is attached to the remote system\n"
2448 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
2450 /* See FIXME above. */
2452 wait_forever_enabled_p
= 1;
2454 target_preopen (from_tty
);
2456 unpush_target (target
);
2458 /* Make sure we send the passed signals list the next time we resume. */
2459 xfree (last_pass_packet
);
2460 last_pass_packet
= NULL
;
2462 remote_fileio_reset ();
2463 reopen_exec_file ();
2466 remote_desc
= remote_serial_open (name
);
2468 perror_with_name (name
);
2470 if (baud_rate
!= -1)
2472 if (serial_setbaudrate (remote_desc
, baud_rate
))
2474 /* The requested speed could not be set. Error out to
2475 top level after closing remote_desc. Take care to
2476 set remote_desc to NULL to avoid closing remote_desc
2478 serial_close (remote_desc
);
2480 perror_with_name (name
);
2484 serial_raw (remote_desc
);
2486 /* If there is something sitting in the buffer we might take it as a
2487 response to a command, which would be bad. */
2488 serial_flush_input (remote_desc
);
2492 puts_filtered ("Remote debugging using ");
2493 puts_filtered (name
);
2494 puts_filtered ("\n");
2496 push_target (target
); /* Switch to using remote target now. */
2498 /* Reset the target state; these things will be queried either by
2499 remote_query_supported or as they are needed. */
2500 init_all_packet_configs ();
2501 rs
->explicit_packet_size
= 0;
2503 general_thread
= -2;
2504 continue_thread
= -2;
2506 /* Probe for ability to use "ThreadInfo" query, as required. */
2507 use_threadinfo_query
= 1;
2508 use_threadextra_query
= 1;
2510 /* The first packet we send to the target is the optional "supported
2511 packets" request. If the target can answer this, it will tell us
2512 which later probes to skip. */
2513 remote_query_supported ();
2515 /* Next, if the target can specify a description, read it. We do
2516 this before anything involving memory or registers. */
2517 target_find_description ();
2519 /* Without this, some commands which require an active target (such
2520 as kill) won't work. This variable serves (at least) double duty
2521 as both the pid of the target process (if it has such), and as a
2522 flag indicating that a target is active. These functions should
2523 be split out into seperate variables, especially since GDB will
2524 someday have a notion of debugging several processes. */
2526 inferior_ptid
= pid_to_ptid (MAGIC_NULL_PID
);
2530 /* With this target we start out by owning the terminal. */
2531 remote_async_terminal_ours_p
= 1;
2533 /* FIXME: cagney/1999-09-23: During the initial connection it is
2534 assumed that the target is already ready and able to respond to
2535 requests. Unfortunately remote_start_remote() eventually calls
2536 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2537 around this. Eventually a mechanism that allows
2538 wait_for_inferior() to expect/get timeouts will be
2540 wait_forever_enabled_p
= 0;
2543 /* First delete any symbols previously loaded from shared libraries. */
2544 no_shared_libraries (NULL
, 0);
2546 /* Start the remote connection. If error() or QUIT, discard this
2547 target (we'd otherwise be in an inconsistent state) and then
2548 propogate the error on up the exception chain. This ensures that
2549 the caller doesn't stumble along blindly assuming that the
2550 function succeeded. The CLI doesn't have this problem but other
2551 UI's, such as MI do.
2553 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
2554 this function should return an error indication letting the
2555 caller restore the previous state. Unfortunately the command
2556 ``target remote'' is directly wired to this function making that
2557 impossible. On a positive note, the CLI side of this problem has
2558 been fixed - the function set_cmd_context() makes it possible for
2559 all the ``target ....'' commands to share a common callback
2560 function. See cli-dump.c. */
2562 struct gdb_exception ex
2563 = catch_exception (uiout
, remote_start_remote
, &from_tty
,
2569 wait_forever_enabled_p
= 1;
2570 throw_exception (ex
);
2575 wait_forever_enabled_p
= 1;
2579 /* Tell the remote that we are using the extended protocol. */
2581 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2584 if (exec_bfd
) /* No use without an exec file. */
2585 remote_check_symbols (symfile_objfile
);
2588 /* This takes a program previously attached to and detaches it. After
2589 this is done, GDB can be used to debug some other program. We
2590 better not have left any breakpoints in the target program or it'll
2591 die when it hits one. */
2594 remote_detach (char *args
, int from_tty
)
2596 struct remote_state
*rs
= get_remote_state ();
2599 error (_("Argument given to \"detach\" when remotely debugging."));
2601 /* Tell the remote target to detach. */
2602 strcpy (rs
->buf
, "D");
2603 remote_send (&rs
->buf
, &rs
->buf_size
);
2605 /* Unregister the file descriptor from the event loop. */
2606 if (target_is_async_p ())
2607 serial_async (remote_desc
, NULL
, 0);
2609 target_mourn_inferior ();
2611 puts_filtered ("Ending remote debugging.\n");
2614 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
2617 remote_disconnect (struct target_ops
*target
, char *args
, int from_tty
)
2620 error (_("Argument given to \"detach\" when remotely debugging."));
2622 /* Unregister the file descriptor from the event loop. */
2623 if (target_is_async_p ())
2624 serial_async (remote_desc
, NULL
, 0);
2626 target_mourn_inferior ();
2628 puts_filtered ("Ending remote debugging.\n");
2631 /* Convert hex digit A to a number. */
2636 if (a
>= '0' && a
<= '9')
2638 else if (a
>= 'a' && a
<= 'f')
2639 return a
- 'a' + 10;
2640 else if (a
>= 'A' && a
<= 'F')
2641 return a
- 'A' + 10;
2643 error (_("Reply contains invalid hex digit %d"), a
);
2647 hex2bin (const char *hex
, gdb_byte
*bin
, int count
)
2651 for (i
= 0; i
< count
; i
++)
2653 if (hex
[0] == 0 || hex
[1] == 0)
2655 /* Hex string is short, or of uneven length.
2656 Return the count that has been converted so far. */
2659 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
2665 /* Convert number NIB to a hex digit. */
2673 return 'a' + nib
- 10;
2677 bin2hex (const gdb_byte
*bin
, char *hex
, int count
)
2680 /* May use a length, or a nul-terminated string as input. */
2682 count
= strlen ((char *) bin
);
2684 for (i
= 0; i
< count
; i
++)
2686 *hex
++ = tohex ((*bin
>> 4) & 0xf);
2687 *hex
++ = tohex (*bin
++ & 0xf);
2693 /* Check for the availability of vCont. This function should also check
2697 remote_vcont_probe (struct remote_state
*rs
)
2701 strcpy (rs
->buf
, "vCont?");
2703 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2706 /* Make sure that the features we assume are supported. */
2707 if (strncmp (buf
, "vCont", 5) == 0)
2710 int support_s
, support_S
, support_c
, support_C
;
2716 while (p
&& *p
== ';')
2719 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2721 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2723 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2725 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2728 p
= strchr (p
, ';');
2731 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
2732 BUF will make packet_ok disable the packet. */
2733 if (!support_s
|| !support_S
|| !support_c
|| !support_C
)
2737 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
2740 /* Resume the remote inferior by using a "vCont" packet. The thread
2741 to be resumed is PTID; STEP and SIGGNAL indicate whether the
2742 resumed thread should be single-stepped and/or signalled. If PTID's
2743 PID is -1, then all threads are resumed; the thread to be stepped and/or
2744 signalled is given in the global INFERIOR_PTID. This function returns
2745 non-zero iff it resumes the inferior.
2747 This function issues a strict subset of all possible vCont commands at the
2751 remote_vcont_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2753 struct remote_state
*rs
= get_remote_state ();
2754 int pid
= PIDGET (ptid
);
2755 char *buf
= NULL
, *outbuf
;
2756 struct cleanup
*old_cleanup
;
2758 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
2759 remote_vcont_probe (rs
);
2761 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_DISABLE
)
2764 /* If we could generate a wider range of packets, we'd have to worry
2765 about overflowing BUF. Should there be a generic
2766 "multi-part-packet" packet? */
2768 if (PIDGET (inferior_ptid
) == MAGIC_NULL_PID
)
2770 /* MAGIC_NULL_PTID means that we don't have any active threads, so we
2771 don't have any PID numbers the inferior will understand. Make sure
2772 to only send forms that do not specify a PID. */
2773 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2774 outbuf
= xstrprintf ("vCont;S%02x", siggnal
);
2776 outbuf
= xstrprintf ("vCont;s");
2777 else if (siggnal
!= TARGET_SIGNAL_0
)
2778 outbuf
= xstrprintf ("vCont;C%02x", siggnal
);
2780 outbuf
= xstrprintf ("vCont;c");
2784 /* Resume all threads, with preference for INFERIOR_PTID. */
2785 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2786 outbuf
= xstrprintf ("vCont;S%02x:%x;c", siggnal
,
2787 PIDGET (inferior_ptid
));
2789 outbuf
= xstrprintf ("vCont;s:%x;c", PIDGET (inferior_ptid
));
2790 else if (siggnal
!= TARGET_SIGNAL_0
)
2791 outbuf
= xstrprintf ("vCont;C%02x:%x;c", siggnal
,
2792 PIDGET (inferior_ptid
));
2794 outbuf
= xstrprintf ("vCont;c");
2798 /* Scheduler locking; resume only PTID. */
2799 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2800 outbuf
= xstrprintf ("vCont;S%02x:%x", siggnal
, pid
);
2802 outbuf
= xstrprintf ("vCont;s:%x", pid
);
2803 else if (siggnal
!= TARGET_SIGNAL_0
)
2804 outbuf
= xstrprintf ("vCont;C%02x:%x", siggnal
, pid
);
2806 outbuf
= xstrprintf ("vCont;c:%x", pid
);
2809 gdb_assert (outbuf
&& strlen (outbuf
) < get_remote_packet_size ());
2810 old_cleanup
= make_cleanup (xfree
, outbuf
);
2814 do_cleanups (old_cleanup
);
2819 /* Tell the remote machine to resume. */
2821 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
2823 static int last_sent_step
;
2826 remote_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2828 struct remote_state
*rs
= get_remote_state ();
2830 int pid
= PIDGET (ptid
);
2832 last_sent_signal
= siggnal
;
2833 last_sent_step
= step
;
2835 /* A hook for when we need to do something at the last moment before
2837 if (deprecated_target_resume_hook
)
2838 (*deprecated_target_resume_hook
) ();
2840 /* Update the inferior on signals to silently pass, if they've changed. */
2841 remote_pass_signals ();
2843 /* The vCont packet doesn't need to specify threads via Hc. */
2844 if (remote_vcont_resume (ptid
, step
, siggnal
))
2847 /* All other supported resume packets do use Hc, so call set_thread. */
2849 set_thread (0, 0); /* Run any thread. */
2851 set_thread (pid
, 0); /* Run this thread. */
2854 if (siggnal
!= TARGET_SIGNAL_0
)
2856 buf
[0] = step
? 'S' : 'C';
2857 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
2858 buf
[2] = tohex (((int) siggnal
) & 0xf);
2862 strcpy (buf
, step
? "s" : "c");
2867 /* Same as remote_resume, but with async support. */
2869 remote_async_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2871 remote_resume (ptid
, step
, siggnal
);
2873 /* We are about to start executing the inferior, let's register it
2874 with the event loop. NOTE: this is the one place where all the
2875 execution commands end up. We could alternatively do this in each
2876 of the execution commands in infcmd.c. */
2877 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
2878 into infcmd.c in order to allow inferior function calls to work
2879 NOT asynchronously. */
2880 if (target_can_async_p ())
2881 target_async (inferior_event_handler
, 0);
2882 /* Tell the world that the target is now executing. */
2883 /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set
2884 this? Instead, should the client of target just assume (for
2885 async targets) that the target is going to start executing? Is
2886 this information already found in the continuation block? */
2887 if (target_is_async_p ())
2888 target_executing
= 1;
2892 /* Set up the signal handler for SIGINT, while the target is
2893 executing, ovewriting the 'regular' SIGINT signal handler. */
2895 initialize_sigint_signal_handler (void)
2897 sigint_remote_token
=
2898 create_async_signal_handler (async_remote_interrupt
, NULL
);
2899 signal (SIGINT
, handle_remote_sigint
);
2902 /* Signal handler for SIGINT, while the target is executing. */
2904 handle_remote_sigint (int sig
)
2906 signal (sig
, handle_remote_sigint_twice
);
2907 sigint_remote_twice_token
=
2908 create_async_signal_handler (async_remote_interrupt_twice
, NULL
);
2909 mark_async_signal_handler_wrapper (sigint_remote_token
);
2912 /* Signal handler for SIGINT, installed after SIGINT has already been
2913 sent once. It will take effect the second time that the user sends
2916 handle_remote_sigint_twice (int sig
)
2918 signal (sig
, handle_sigint
);
2919 sigint_remote_twice_token
=
2920 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
2921 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
2924 /* Perform the real interruption of the target execution, in response
2927 async_remote_interrupt (gdb_client_data arg
)
2930 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2935 /* Perform interrupt, if the first attempt did not succeed. Just give
2936 up on the target alltogether. */
2938 async_remote_interrupt_twice (gdb_client_data arg
)
2941 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
2942 /* Do something only if the target was not killed by the previous
2944 if (target_executing
)
2947 signal (SIGINT
, handle_remote_sigint
);
2951 /* Reinstall the usual SIGINT handlers, after the target has
2954 cleanup_sigint_signal_handler (void *dummy
)
2956 signal (SIGINT
, handle_sigint
);
2957 if (sigint_remote_twice_token
)
2958 delete_async_signal_handler (&sigint_remote_twice_token
);
2959 if (sigint_remote_token
)
2960 delete_async_signal_handler (&sigint_remote_token
);
2963 /* Send ^C to target to halt it. Target will respond, and send us a
2965 static void (*ofunc
) (int);
2967 /* The command line interface's stop routine. This function is installed
2968 as a signal handler for SIGINT. The first time a user requests a
2969 stop, we call remote_stop to send a break or ^C. If there is no
2970 response from the target (it didn't stop when the user requested it),
2971 we ask the user if he'd like to detach from the target. */
2973 remote_interrupt (int signo
)
2975 /* If this doesn't work, try more severe steps. */
2976 signal (signo
, remote_interrupt_twice
);
2979 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2984 /* The user typed ^C twice. */
2987 remote_interrupt_twice (int signo
)
2989 signal (signo
, ofunc
);
2991 signal (signo
, remote_interrupt
);
2994 /* This is the generic stop called via the target vector. When a target
2995 interrupt is requested, either by the command line or the GUI, we
2996 will eventually end up here. */
3000 /* Send a break or a ^C, depending on user preference. */
3002 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
3005 serial_send_break (remote_desc
);
3007 serial_write (remote_desc
, "\003", 1);
3010 /* Ask the user what to do when an interrupt is received. */
3013 interrupt_query (void)
3015 target_terminal_ours ();
3017 if (query ("Interrupted while waiting for the program.\n\
3018 Give up (and stop debugging it)? "))
3020 target_mourn_inferior ();
3021 deprecated_throw_reason (RETURN_QUIT
);
3024 target_terminal_inferior ();
3027 /* Enable/disable target terminal ownership. Most targets can use
3028 terminal groups to control terminal ownership. Remote targets are
3029 different in that explicit transfer of ownership to/from GDB/target
3033 remote_async_terminal_inferior (void)
3035 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
3036 sync_execution here. This function should only be called when
3037 GDB is resuming the inferior in the forground. A background
3038 resume (``run&'') should leave GDB in control of the terminal and
3039 consequently should not call this code. */
3040 if (!sync_execution
)
3042 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
3043 calls target_terminal_*() idenpotent. The event-loop GDB talking
3044 to an asynchronous target with a synchronous command calls this
3045 function from both event-top.c and infrun.c/infcmd.c. Once GDB
3046 stops trying to transfer the terminal to the target when it
3047 shouldn't this guard can go away. */
3048 if (!remote_async_terminal_ours_p
)
3050 delete_file_handler (input_fd
);
3051 remote_async_terminal_ours_p
= 0;
3052 initialize_sigint_signal_handler ();
3053 /* NOTE: At this point we could also register our selves as the
3054 recipient of all input. Any characters typed could then be
3055 passed on down to the target. */
3059 remote_async_terminal_ours (void)
3061 /* See FIXME in remote_async_terminal_inferior. */
3062 if (!sync_execution
)
3064 /* See FIXME in remote_async_terminal_inferior. */
3065 if (remote_async_terminal_ours_p
)
3067 cleanup_sigint_signal_handler (NULL
);
3068 add_file_handler (input_fd
, stdin_event_handler
, 0);
3069 remote_async_terminal_ours_p
= 1;
3072 /* If nonzero, ignore the next kill. */
3077 remote_console_output (char *msg
)
3081 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
3084 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
3087 fputs_unfiltered (tb
, gdb_stdtarg
);
3089 gdb_flush (gdb_stdtarg
);
3092 /* Wait until the remote machine stops, then return,
3093 storing status in STATUS just as `wait' would.
3094 Returns "pid", which in the case of a multi-threaded
3095 remote OS, is the thread-id. */
3098 remote_wait (ptid_t ptid
, struct target_waitstatus
*status
)
3100 struct remote_state
*rs
= get_remote_state ();
3101 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3102 ULONGEST thread_num
= -1;
3105 status
->kind
= TARGET_WAITKIND_EXITED
;
3106 status
->value
.integer
= 0;
3112 ofunc
= signal (SIGINT
, remote_interrupt
);
3113 getpkt (&rs
->buf
, &rs
->buf_size
, 1);
3114 signal (SIGINT
, ofunc
);
3118 /* This is a hook for when we need to do something (perhaps the
3119 collection of trace data) every time the target stops. */
3120 if (deprecated_target_wait_loop_hook
)
3121 (*deprecated_target_wait_loop_hook
) ();
3123 remote_stopped_by_watchpoint_p
= 0;
3127 case 'E': /* Error of some sort. */
3128 warning (_("Remote failure reply: %s"), buf
);
3130 case 'F': /* File-I/O request. */
3131 remote_fileio_request (buf
);
3133 case 'T': /* Status with PC, SP, FP, ... */
3135 gdb_byte regs
[MAX_REGISTER_SIZE
];
3137 /* Expedited reply, containing Signal, {regno, reg} repeat. */
3138 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3140 n... = register number
3141 r... = register contents
3143 p
= &buf
[3]; /* after Txx */
3152 /* If the packet contains a register number save it in
3153 pnum and set p1 to point to the character following
3154 it. Otherwise p1 points to p. */
3156 /* If this packet is an awatch packet, don't parse the
3157 'a' as a register number. */
3159 if (strncmp (p
, "awatch", strlen("awatch")) != 0)
3161 /* Read the ``P'' register number. */
3162 pnum
= strtol (p
, &p_temp
, 16);
3168 if (p1
== p
) /* No register number present here. */
3170 p1
= strchr (p
, ':');
3172 error (_("Malformed packet(a) (missing colon): %s\n\
3175 if (strncmp (p
, "thread", p1
- p
) == 0)
3177 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
3178 record_currthread (thread_num
);
3181 else if ((strncmp (p
, "watch", p1
- p
) == 0)
3182 || (strncmp (p
, "rwatch", p1
- p
) == 0)
3183 || (strncmp (p
, "awatch", p1
- p
) == 0))
3185 remote_stopped_by_watchpoint_p
= 1;
3186 p
= unpack_varlen_hex (++p1
, &addr
);
3187 remote_watch_data_address
= (CORE_ADDR
)addr
;
3191 /* Silently skip unknown optional info. */
3192 p_temp
= strchr (p1
+ 1, ';');
3199 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
3203 error (_("Malformed packet(b) (missing colon): %s\n\
3208 error (_("Remote sent bad register number %s: %s\n\
3210 phex_nz (pnum
, 0), p
, buf
);
3212 fieldsize
= hex2bin (p
, regs
,
3213 register_size (current_gdbarch
,
3216 if (fieldsize
< register_size (current_gdbarch
,
3218 warning (_("Remote reply is too short: %s"), buf
);
3219 regcache_raw_supply (current_regcache
,
3224 error (_("Remote register badly formatted: %s\nhere: %s"),
3229 case 'S': /* Old style status, just signal only. */
3230 status
->kind
= TARGET_WAITKIND_STOPPED
;
3231 status
->value
.sig
= (enum target_signal
)
3232 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3236 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
3237 record_currthread (thread_num
);
3240 case 'W': /* Target exited. */
3242 /* The remote process exited. */
3243 status
->kind
= TARGET_WAITKIND_EXITED
;
3244 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
3248 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
3249 status
->value
.sig
= (enum target_signal
)
3250 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3254 case 'O': /* Console output. */
3255 remote_console_output (buf
+ 1);
3258 if (last_sent_signal
!= TARGET_SIGNAL_0
)
3260 /* Zero length reply means that we tried 'S' or 'C' and
3261 the remote system doesn't support it. */
3262 target_terminal_ours_for_output ();
3264 ("Can't send signals to this remote system. %s not sent.\n",
3265 target_signal_to_name (last_sent_signal
));
3266 last_sent_signal
= TARGET_SIGNAL_0
;
3267 target_terminal_inferior ();
3269 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
3270 putpkt ((char *) buf
);
3273 /* else fallthrough */
3275 warning (_("Invalid remote reply: %s"), buf
);
3280 if (thread_num
!= -1)
3282 return pid_to_ptid (thread_num
);
3284 return inferior_ptid
;
3287 /* Async version of remote_wait. */
3289 remote_async_wait (ptid_t ptid
, struct target_waitstatus
*status
)
3291 struct remote_state
*rs
= get_remote_state ();
3292 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3293 ULONGEST thread_num
= -1;
3296 status
->kind
= TARGET_WAITKIND_EXITED
;
3297 status
->value
.integer
= 0;
3299 remote_stopped_by_watchpoint_p
= 0;
3305 if (!target_is_async_p ())
3306 ofunc
= signal (SIGINT
, remote_interrupt
);
3307 /* FIXME: cagney/1999-09-27: If we're in async mode we should
3308 _never_ wait for ever -> test on target_is_async_p().
3309 However, before we do that we need to ensure that the caller
3310 knows how to take the target into/out of async mode. */
3311 getpkt (&rs
->buf
, &rs
->buf_size
, wait_forever_enabled_p
);
3312 if (!target_is_async_p ())
3313 signal (SIGINT
, ofunc
);
3317 /* This is a hook for when we need to do something (perhaps the
3318 collection of trace data) every time the target stops. */
3319 if (deprecated_target_wait_loop_hook
)
3320 (*deprecated_target_wait_loop_hook
) ();
3324 case 'E': /* Error of some sort. */
3325 warning (_("Remote failure reply: %s"), buf
);
3327 case 'F': /* File-I/O request. */
3328 remote_fileio_request (buf
);
3330 case 'T': /* Status with PC, SP, FP, ... */
3332 gdb_byte regs
[MAX_REGISTER_SIZE
];
3334 /* Expedited reply, containing Signal, {regno, reg} repeat. */
3335 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3337 n... = register number
3338 r... = register contents
3340 p
= &buf
[3]; /* after Txx */
3349 /* If the packet contains a register number, save it
3350 in pnum and set p1 to point to the character
3351 following it. Otherwise p1 points to p. */
3353 /* If this packet is an awatch packet, don't parse the 'a'
3354 as a register number. */
3356 if (!strncmp (p
, "awatch", strlen ("awatch")) != 0)
3358 /* Read the register number. */
3359 pnum
= strtol (p
, &p_temp
, 16);
3365 if (p1
== p
) /* No register number present here. */
3367 p1
= strchr (p
, ':');
3369 error (_("Malformed packet(a) (missing colon): %s\n\
3372 if (strncmp (p
, "thread", p1
- p
) == 0)
3374 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
3375 record_currthread (thread_num
);
3378 else if ((strncmp (p
, "watch", p1
- p
) == 0)
3379 || (strncmp (p
, "rwatch", p1
- p
) == 0)
3380 || (strncmp (p
, "awatch", p1
- p
) == 0))
3382 remote_stopped_by_watchpoint_p
= 1;
3383 p
= unpack_varlen_hex (++p1
, &addr
);
3384 remote_watch_data_address
= (CORE_ADDR
)addr
;
3388 /* Silently skip unknown optional info. */
3389 p_temp
= strchr (p1
+ 1, ';');
3397 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
3400 error (_("Malformed packet(b) (missing colon): %s\n\
3405 error (_("Remote sent bad register number %ld: %s\n\
3409 fieldsize
= hex2bin (p
, regs
,
3410 register_size (current_gdbarch
,
3413 if (fieldsize
< register_size (current_gdbarch
,
3415 warning (_("Remote reply is too short: %s"), buf
);
3416 regcache_raw_supply (current_regcache
, reg
->regnum
, regs
);
3420 error (_("Remote register badly formatted: %s\nhere: %s"),
3425 case 'S': /* Old style status, just signal only. */
3426 status
->kind
= TARGET_WAITKIND_STOPPED
;
3427 status
->value
.sig
= (enum target_signal
)
3428 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3432 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
3433 record_currthread (thread_num
);
3436 case 'W': /* Target exited. */
3438 /* The remote process exited. */
3439 status
->kind
= TARGET_WAITKIND_EXITED
;
3440 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
3444 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
3445 status
->value
.sig
= (enum target_signal
)
3446 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3450 case 'O': /* Console output. */
3451 remote_console_output (buf
+ 1);
3452 /* Return immediately to the event loop. The event loop will
3453 still be waiting on the inferior afterwards. */
3454 status
->kind
= TARGET_WAITKIND_IGNORE
;
3457 if (last_sent_signal
!= TARGET_SIGNAL_0
)
3459 /* Zero length reply means that we tried 'S' or 'C' and
3460 the remote system doesn't support it. */
3461 target_terminal_ours_for_output ();
3463 ("Can't send signals to this remote system. %s not sent.\n",
3464 target_signal_to_name (last_sent_signal
));
3465 last_sent_signal
= TARGET_SIGNAL_0
;
3466 target_terminal_inferior ();
3468 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
3469 putpkt ((char *) buf
);
3472 /* else fallthrough */
3474 warning (_("Invalid remote reply: %s"), buf
);
3479 if (thread_num
!= -1)
3481 return pid_to_ptid (thread_num
);
3483 return inferior_ptid
;
3486 /* Fetch a single register using a 'p' packet. */
3489 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
3491 struct remote_state
*rs
= get_remote_state ();
3493 char regp
[MAX_REGISTER_SIZE
];
3496 if (remote_protocol_packets
[PACKET_p
].support
== PACKET_DISABLE
)
3499 if (reg
->pnum
== -1)
3504 p
+= hexnumstr (p
, reg
->pnum
);
3506 remote_send (&rs
->buf
, &rs
->buf_size
);
3510 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
3514 case PACKET_UNKNOWN
:
3517 error (_("Could not fetch register \"%s\""),
3518 gdbarch_register_name (current_gdbarch
, reg
->regnum
));
3521 /* If this register is unfetchable, tell the regcache. */
3524 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
3528 /* Otherwise, parse and supply the value. */
3534 error (_("fetch_register_using_p: early buf termination"));
3536 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3539 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
3543 /* Fetch the registers included in the target's 'g' packet. */
3546 send_g_packet (void)
3548 struct remote_state
*rs
= get_remote_state ();
3553 sprintf (rs
->buf
, "g");
3554 remote_send (&rs
->buf
, &rs
->buf_size
);
3556 /* We can get out of synch in various cases. If the first character
3557 in the buffer is not a hex character, assume that has happened
3558 and try to fetch another packet to read. */
3559 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
3560 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
3561 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
3562 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
3565 fprintf_unfiltered (gdb_stdlog
,
3566 "Bad register packet; fetching a new packet\n");
3567 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3570 buf_len
= strlen (rs
->buf
);
3572 /* Sanity check the received packet. */
3573 if (buf_len
% 2 != 0)
3574 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
3580 process_g_packet (struct regcache
*regcache
)
3582 struct remote_state
*rs
= get_remote_state ();
3583 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3588 buf_len
= strlen (rs
->buf
);
3590 /* Further sanity checks, with knowledge of the architecture. */
3591 if (REGISTER_BYTES_OK_P () && !REGISTER_BYTES_OK (buf_len
/ 2))
3592 error (_("Remote 'g' packet reply is wrong length: %s"), rs
->buf
);
3593 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
3594 error (_("Remote 'g' packet reply is too long: %s"), rs
->buf
);
3596 /* Save the size of the packet sent to us by the target. It is used
3597 as a heuristic when determining the max size of packets that the
3598 target can safely receive. */
3599 if (rsa
->actual_register_packet_size
== 0)
3600 rsa
->actual_register_packet_size
= buf_len
;
3602 /* If this is smaller than we guessed the 'g' packet would be,
3603 update our records. A 'g' reply that doesn't include a register's
3604 value implies either that the register is not available, or that
3605 the 'p' packet must be used. */
3606 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
3608 rsa
->sizeof_g_packet
= buf_len
/ 2;
3610 for (i
= 0; i
< NUM_REGS
; i
++)
3612 if (rsa
->regs
[i
].pnum
== -1)
3615 if (rsa
->regs
[i
].offset
>= rsa
->sizeof_g_packet
)
3616 rsa
->regs
[i
].in_g_packet
= 0;
3618 rsa
->regs
[i
].in_g_packet
= 1;
3622 regs
= alloca (rsa
->sizeof_g_packet
);
3624 /* Unimplemented registers read as all bits zero. */
3625 memset (regs
, 0, rsa
->sizeof_g_packet
);
3627 /* Reply describes registers byte by byte, each byte encoded as two
3628 hex characters. Suck them all up, then supply them to the
3629 register cacheing/storage mechanism. */
3632 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
3634 if (p
[0] == 0 || p
[1] == 0)
3635 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
3636 internal_error (__FILE__
, __LINE__
,
3637 "unexpected end of 'g' packet reply");
3639 if (p
[0] == 'x' && p
[1] == 'x')
3640 regs
[i
] = 0; /* 'x' */
3642 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3648 for (i
= 0; i
< NUM_REGS
; i
++)
3650 struct packet_reg
*r
= &rsa
->regs
[i
];
3653 if (r
->offset
* 2 >= strlen (rs
->buf
))
3654 /* This shouldn't happen - we adjusted in_g_packet above. */
3655 internal_error (__FILE__
, __LINE__
,
3656 "unexpected end of 'g' packet reply");
3657 else if (rs
->buf
[r
->offset
* 2] == 'x')
3659 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
3660 /* The register isn't available, mark it as such (at
3661 the same time setting the value to zero). */
3662 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
3665 regcache_raw_supply (regcache
, r
->regnum
,
3673 fetch_registers_using_g (struct regcache
*regcache
)
3676 process_g_packet (regcache
);
3680 remote_fetch_registers (struct regcache
*regcache
, int regnum
)
3682 struct remote_state
*rs
= get_remote_state ();
3683 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3686 set_thread (PIDGET (inferior_ptid
), 1);
3690 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
3691 gdb_assert (reg
!= NULL
);
3693 /* If this register might be in the 'g' packet, try that first -
3694 we are likely to read more than one register. If this is the
3695 first 'g' packet, we might be overly optimistic about its
3696 contents, so fall back to 'p'. */
3697 if (reg
->in_g_packet
)
3699 fetch_registers_using_g (regcache
);
3700 if (reg
->in_g_packet
)
3704 if (fetch_register_using_p (regcache
, reg
))
3707 /* This register is not available. */
3708 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
3713 fetch_registers_using_g (regcache
);
3715 for (i
= 0; i
< NUM_REGS
; i
++)
3716 if (!rsa
->regs
[i
].in_g_packet
)
3717 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
3719 /* This register is not available. */
3720 regcache_raw_supply (regcache
, i
, NULL
);
3724 /* Prepare to store registers. Since we may send them all (using a
3725 'G' request), we have to read out the ones we don't want to change
3729 remote_prepare_to_store (struct regcache
*regcache
)
3731 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3733 gdb_byte buf
[MAX_REGISTER_SIZE
];
3735 /* Make sure the entire registers array is valid. */
3736 switch (remote_protocol_packets
[PACKET_P
].support
)
3738 case PACKET_DISABLE
:
3739 case PACKET_SUPPORT_UNKNOWN
:
3740 /* Make sure all the necessary registers are cached. */
3741 for (i
= 0; i
< NUM_REGS
; i
++)
3742 if (rsa
->regs
[i
].in_g_packet
)
3743 regcache_raw_read (regcache
, rsa
->regs
[i
].regnum
, buf
);
3750 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
3751 packet was not recognized. */
3754 store_register_using_P (const struct regcache
*regcache
, struct packet_reg
*reg
)
3756 struct remote_state
*rs
= get_remote_state ();
3757 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3758 /* Try storing a single register. */
3759 char *buf
= rs
->buf
;
3760 gdb_byte regp
[MAX_REGISTER_SIZE
];
3763 if (remote_protocol_packets
[PACKET_P
].support
== PACKET_DISABLE
)
3766 if (reg
->pnum
== -1)
3769 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
3770 p
= buf
+ strlen (buf
);
3771 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
3772 bin2hex (regp
, p
, register_size (current_gdbarch
, reg
->regnum
));
3773 remote_send (&rs
->buf
, &rs
->buf_size
);
3775 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
3780 error (_("Could not write register \"%s\""),
3781 gdbarch_register_name (current_gdbarch
, reg
->regnum
));
3782 case PACKET_UNKNOWN
:
3785 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
3789 /* Store register REGNUM, or all registers if REGNUM == -1, from the
3790 contents of the register cache buffer. FIXME: ignores errors. */
3793 store_registers_using_G (const struct regcache
*regcache
)
3795 struct remote_state
*rs
= get_remote_state ();
3796 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3800 /* Extract all the registers in the regcache copying them into a
3804 regs
= alloca (rsa
->sizeof_g_packet
);
3805 memset (regs
, 0, rsa
->sizeof_g_packet
);
3806 for (i
= 0; i
< NUM_REGS
; i
++)
3808 struct packet_reg
*r
= &rsa
->regs
[i
];
3810 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
3814 /* Command describes registers byte by byte,
3815 each byte encoded as two hex characters. */
3818 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
3820 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
3821 remote_send (&rs
->buf
, &rs
->buf_size
);
3824 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
3825 of the register cache buffer. FIXME: ignores errors. */
3828 remote_store_registers (struct regcache
*regcache
, int regnum
)
3830 struct remote_state
*rs
= get_remote_state ();
3831 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3834 set_thread (PIDGET (inferior_ptid
), 1);
3838 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
3839 gdb_assert (reg
!= NULL
);
3841 /* Always prefer to store registers using the 'P' packet if
3842 possible; we often change only a small number of registers.
3843 Sometimes we change a larger number; we'd need help from a
3844 higher layer to know to use 'G'. */
3845 if (store_register_using_P (regcache
, reg
))
3848 /* For now, don't complain if we have no way to write the
3849 register. GDB loses track of unavailable registers too
3850 easily. Some day, this may be an error. We don't have
3851 any way to read the register, either... */
3852 if (!reg
->in_g_packet
)
3855 store_registers_using_G (regcache
);
3859 store_registers_using_G (regcache
);
3861 for (i
= 0; i
< NUM_REGS
; i
++)
3862 if (!rsa
->regs
[i
].in_g_packet
)
3863 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
3864 /* See above for why we do not issue an error here. */
3869 /* Return the number of hex digits in num. */
3872 hexnumlen (ULONGEST num
)
3876 for (i
= 0; num
!= 0; i
++)
3882 /* Set BUF to the minimum number of hex digits representing NUM. */
3885 hexnumstr (char *buf
, ULONGEST num
)
3887 int len
= hexnumlen (num
);
3888 return hexnumnstr (buf
, num
, len
);
3892 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
3895 hexnumnstr (char *buf
, ULONGEST num
, int width
)
3901 for (i
= width
- 1; i
>= 0; i
--)
3903 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
3910 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
3913 remote_address_masked (CORE_ADDR addr
)
3915 if (remote_address_size
> 0
3916 && remote_address_size
< (sizeof (ULONGEST
) * 8))
3918 /* Only create a mask when that mask can safely be constructed
3919 in a ULONGEST variable. */
3921 mask
= (mask
<< remote_address_size
) - 1;
3927 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
3928 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
3929 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
3930 (which may be more than *OUT_LEN due to escape characters). The
3931 total number of bytes in the output buffer will be at most
3935 remote_escape_output (const gdb_byte
*buffer
, int len
,
3936 gdb_byte
*out_buf
, int *out_len
,
3939 int input_index
, output_index
;
3942 for (input_index
= 0; input_index
< len
; input_index
++)
3944 gdb_byte b
= buffer
[input_index
];
3946 if (b
== '$' || b
== '#' || b
== '}')
3948 /* These must be escaped. */
3949 if (output_index
+ 2 > out_maxlen
)
3951 out_buf
[output_index
++] = '}';
3952 out_buf
[output_index
++] = b
^ 0x20;
3956 if (output_index
+ 1 > out_maxlen
)
3958 out_buf
[output_index
++] = b
;
3962 *out_len
= input_index
;
3963 return output_index
;
3966 /* Convert BUFFER, escaped data LEN bytes long, into binary data
3967 in OUT_BUF. Return the number of bytes written to OUT_BUF.
3968 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
3970 This function reverses remote_escape_output. It allows more
3971 escaped characters than that function does, in particular because
3972 '*' must be escaped to avoid the run-length encoding processing
3973 in reading packets. */
3976 remote_unescape_input (const gdb_byte
*buffer
, int len
,
3977 gdb_byte
*out_buf
, int out_maxlen
)
3979 int input_index
, output_index
;
3984 for (input_index
= 0; input_index
< len
; input_index
++)
3986 gdb_byte b
= buffer
[input_index
];
3988 if (output_index
+ 1 > out_maxlen
)
3990 warning (_("Received too much data from remote target;"
3991 " ignoring overflow."));
3992 return output_index
;
3997 out_buf
[output_index
++] = b
^ 0x20;
4003 out_buf
[output_index
++] = b
;
4007 error (_("Unmatched escape character in target response."));
4009 return output_index
;
4012 /* Determine whether the remote target supports binary downloading.
4013 This is accomplished by sending a no-op memory write of zero length
4014 to the target at the specified address. It does not suffice to send
4015 the whole packet, since many stubs strip the eighth bit and
4016 subsequently compute a wrong checksum, which causes real havoc with
4019 NOTE: This can still lose if the serial line is not eight-bit
4020 clean. In cases like this, the user should clear "remote
4024 check_binary_download (CORE_ADDR addr
)
4026 struct remote_state
*rs
= get_remote_state ();
4028 switch (remote_protocol_packets
[PACKET_X
].support
)
4030 case PACKET_DISABLE
:
4034 case PACKET_SUPPORT_UNKNOWN
:
4040 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4042 p
+= hexnumstr (p
, (ULONGEST
) 0);
4046 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
4047 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4049 if (rs
->buf
[0] == '\0')
4052 fprintf_unfiltered (gdb_stdlog
,
4053 "binary downloading NOT suppported by target\n");
4054 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
4059 fprintf_unfiltered (gdb_stdlog
,
4060 "binary downloading suppported by target\n");
4061 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
4068 /* Write memory data directly to the remote machine.
4069 This does not inform the data cache; the data cache uses this.
4070 HEADER is the starting part of the packet.
4071 MEMADDR is the address in the remote memory space.
4072 MYADDR is the address of the buffer in our space.
4073 LEN is the number of bytes.
4074 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
4075 should send data as binary ('X'), or hex-encoded ('M').
4077 The function creates packet of the form
4078 <HEADER><ADDRESS>,<LENGTH>:<DATA>
4080 where encoding of <DATA> is termined by PACKET_FORMAT.
4082 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
4085 Returns the number of bytes transferred, or 0 (setting errno) for
4086 error. Only transfer a single packet. */
4089 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
4090 const gdb_byte
*myaddr
, int len
,
4091 char packet_format
, int use_length
)
4093 struct remote_state
*rs
= get_remote_state ();
4103 if (packet_format
!= 'X' && packet_format
!= 'M')
4104 internal_error (__FILE__
, __LINE__
,
4105 "remote_write_bytes_aux: bad packet format");
4107 /* Should this be the selected frame? */
4108 gdbarch_remote_translate_xfer_address (current_gdbarch
,
4116 payload_size
= get_memory_write_packet_size ();
4118 /* The packet buffer will be large enough for the payload;
4119 get_memory_packet_size ensures this. */
4122 /* Compute the size of the actual payload by subtracting out the
4123 packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
4125 payload_size
-= strlen ("$,:#NN");
4127 /* The comma won't be used. */
4129 header_length
= strlen (header
);
4130 payload_size
-= header_length
;
4131 payload_size
-= hexnumlen (memaddr
);
4133 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
4135 strcat (rs
->buf
, header
);
4136 p
= rs
->buf
+ strlen (header
);
4138 /* Compute a best guess of the number of bytes actually transfered. */
4139 if (packet_format
== 'X')
4141 /* Best guess at number of bytes that will fit. */
4142 todo
= min (len
, payload_size
);
4144 payload_size
-= hexnumlen (todo
);
4145 todo
= min (todo
, payload_size
);
4149 /* Num bytes that will fit. */
4150 todo
= min (len
, payload_size
/ 2);
4152 payload_size
-= hexnumlen (todo
);
4153 todo
= min (todo
, payload_size
/ 2);
4157 internal_error (__FILE__
, __LINE__
,
4158 _("minumum packet size too small to write data"));
4160 /* If we already need another packet, then try to align the end
4161 of this packet to a useful boundary. */
4162 if (todo
> 2 * REMOTE_ALIGN_WRITES
&& todo
< len
)
4163 todo
= ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
4165 /* Append "<memaddr>". */
4166 memaddr
= remote_address_masked (memaddr
);
4167 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
4174 /* Append <len>. Retain the location/size of <len>. It may need to
4175 be adjusted once the packet body has been created. */
4177 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
4185 /* Append the packet body. */
4186 if (packet_format
== 'X')
4188 /* Binary mode. Send target system values byte by byte, in
4189 increasing byte addresses. Only escape certain critical
4191 payload_length
= remote_escape_output (myaddr
, todo
, p
, &nr_bytes
,
4194 /* If not all TODO bytes fit, then we'll need another packet. Make
4195 a second try to keep the end of the packet aligned. Don't do
4196 this if the packet is tiny. */
4197 if (nr_bytes
< todo
&& nr_bytes
> 2 * REMOTE_ALIGN_WRITES
)
4201 new_nr_bytes
= (((memaddr
+ nr_bytes
) & ~(REMOTE_ALIGN_WRITES
- 1))
4203 if (new_nr_bytes
!= nr_bytes
)
4204 payload_length
= remote_escape_output (myaddr
, new_nr_bytes
,
4209 p
+= payload_length
;
4210 if (use_length
&& nr_bytes
< todo
)
4212 /* Escape chars have filled up the buffer prematurely,
4213 and we have actually sent fewer bytes than planned.
4214 Fix-up the length field of the packet. Use the same
4215 number of characters as before. */
4216 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
4217 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
4222 /* Normal mode: Send target system values byte by byte, in
4223 increasing byte addresses. Each byte is encoded as a two hex
4225 nr_bytes
= bin2hex (myaddr
, p
, todo
);
4229 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
4230 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4232 if (rs
->buf
[0] == 'E')
4234 /* There is no correspondance between what the remote protocol
4235 uses for errors and errno codes. We would like a cleaner way
4236 of representing errors (big enough to include errno codes,
4237 bfd_error codes, and others). But for now just return EIO. */
4242 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
4243 fewer bytes than we'd planned. */
4247 /* Write memory data directly to the remote machine.
4248 This does not inform the data cache; the data cache uses this.
4249 MEMADDR is the address in the remote memory space.
4250 MYADDR is the address of the buffer in our space.
4251 LEN is the number of bytes.
4253 Returns number of bytes transferred, or 0 (setting errno) for
4254 error. Only transfer a single packet. */
4257 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, int len
)
4259 char *packet_format
= 0;
4261 /* Check whether the target supports binary download. */
4262 check_binary_download (memaddr
);
4264 switch (remote_protocol_packets
[PACKET_X
].support
)
4267 packet_format
= "X";
4269 case PACKET_DISABLE
:
4270 packet_format
= "M";
4272 case PACKET_SUPPORT_UNKNOWN
:
4273 internal_error (__FILE__
, __LINE__
,
4274 _("remote_write_bytes: bad internal state"));
4276 internal_error (__FILE__
, __LINE__
, _("bad switch"));
4279 return remote_write_bytes_aux (packet_format
,
4280 memaddr
, myaddr
, len
, packet_format
[0], 1);
4283 /* Read memory data directly from the remote machine.
4284 This does not use the data cache; the data cache uses this.
4285 MEMADDR is the address in the remote memory space.
4286 MYADDR is the address of the buffer in our space.
4287 LEN is the number of bytes.
4289 Returns number of bytes transferred, or 0 for error. */
4291 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
4292 remote targets) shouldn't attempt to read the entire buffer.
4293 Instead it should read a single packet worth of data and then
4294 return the byte size of that packet to the caller. The caller (its
4295 caller and its callers caller ;-) already contains code for
4296 handling partial reads. */
4299 remote_read_bytes (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
4301 struct remote_state
*rs
= get_remote_state ();
4302 int max_buf_size
; /* Max size of packet output buffer. */
4305 /* Should this be the selected frame? */
4306 gdbarch_remote_translate_xfer_address (current_gdbarch
,
4314 max_buf_size
= get_memory_read_packet_size ();
4315 /* The packet buffer will be large enough for the payload;
4316 get_memory_packet_size ensures this. */
4325 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
4327 /* construct "m"<memaddr>","<len>" */
4328 /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */
4329 memaddr
= remote_address_masked (memaddr
);
4332 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
4334 p
+= hexnumstr (p
, (ULONGEST
) todo
);
4338 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4340 if (rs
->buf
[0] == 'E'
4341 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
4342 && rs
->buf
[3] == '\0')
4344 /* There is no correspondance between what the remote
4345 protocol uses for errors and errno codes. We would like
4346 a cleaner way of representing errors (big enough to
4347 include errno codes, bfd_error codes, and others). But
4348 for now just return EIO. */
4353 /* Reply describes memory byte by byte,
4354 each byte encoded as two hex characters. */
4357 if ((i
= hex2bin (p
, myaddr
, todo
)) < todo
)
4359 /* Reply is short. This means that we were able to read
4360 only part of what we wanted to. */
4361 return i
+ (origlen
- len
);
4370 /* Read or write LEN bytes from inferior memory at MEMADDR,
4371 transferring to or from debugger address BUFFER. Write to inferior
4372 if SHOULD_WRITE is nonzero. Returns length of data written or
4373 read; 0 for error. TARGET is unused. */
4376 remote_xfer_memory (CORE_ADDR mem_addr
, gdb_byte
*buffer
, int mem_len
,
4377 int should_write
, struct mem_attrib
*attrib
,
4378 struct target_ops
*target
)
4383 res
= remote_write_bytes (mem_addr
, buffer
, mem_len
);
4385 res
= remote_read_bytes (mem_addr
, buffer
, mem_len
);
4390 /* Sends a packet with content determined by the printf format string
4391 FORMAT and the remaining arguments, then gets the reply. Returns
4392 whether the packet was a success, a failure, or unknown. */
4395 remote_send_printf (const char *format
, ...)
4397 struct remote_state
*rs
= get_remote_state ();
4398 int max_size
= get_remote_packet_size ();
4401 va_start (ap
, format
);
4404 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
4405 internal_error (__FILE__
, __LINE__
, "Too long remote packet.");
4407 if (putpkt (rs
->buf
) < 0)
4408 error (_("Communication problem with target."));
4411 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4413 return packet_check_result (rs
->buf
);
4417 restore_remote_timeout (void *p
)
4419 int value
= *(int *)p
;
4420 remote_timeout
= value
;
4423 /* Flash writing can take quite some time. We'll set
4424 effectively infinite timeout for flash operations.
4425 In future, we'll need to decide on a better approach. */
4426 static const int remote_flash_timeout
= 1000;
4429 remote_flash_erase (struct target_ops
*ops
,
4430 ULONGEST address
, LONGEST length
)
4432 int saved_remote_timeout
= remote_timeout
;
4433 enum packet_result ret
;
4435 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
4436 &saved_remote_timeout
);
4437 remote_timeout
= remote_flash_timeout
;
4439 ret
= remote_send_printf ("vFlashErase:%s,%s",
4444 case PACKET_UNKNOWN
:
4445 error (_("Remote target does not support flash erase"));
4447 error (_("Error erasing flash with vFlashErase packet"));
4452 do_cleanups (back_to
);
4456 remote_flash_write (struct target_ops
*ops
,
4457 ULONGEST address
, LONGEST length
,
4458 const gdb_byte
*data
)
4460 int saved_remote_timeout
= remote_timeout
;
4462 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
4463 &saved_remote_timeout
);
4465 remote_timeout
= remote_flash_timeout
;
4466 ret
= remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 'X', 0);
4467 do_cleanups (back_to
);
4473 remote_flash_done (struct target_ops
*ops
)
4475 int saved_remote_timeout
= remote_timeout
;
4477 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
4478 &saved_remote_timeout
);
4480 remote_timeout
= remote_flash_timeout
;
4481 ret
= remote_send_printf ("vFlashDone");
4482 do_cleanups (back_to
);
4486 case PACKET_UNKNOWN
:
4487 error (_("Remote target does not support vFlashDone"));
4489 error (_("Error finishing flash operation"));
4496 remote_files_info (struct target_ops
*ignore
)
4498 puts_filtered ("Debugging a target over a serial line.\n");
4501 /* Stuff for dealing with the packets which are part of this protocol.
4502 See comment at top of file for details. */
4504 /* Read a single character from the remote end. */
4507 readchar (int timeout
)
4511 ch
= serial_readchar (remote_desc
, timeout
);
4516 switch ((enum serial_rc
) ch
)
4519 target_mourn_inferior ();
4520 error (_("Remote connection closed"));
4523 perror_with_name (_("Remote communication error"));
4525 case SERIAL_TIMEOUT
:
4531 /* Send the command in *BUF to the remote machine, and read the reply
4532 into *BUF. Report an error if we get an error reply. Resize
4533 *BUF using xrealloc if necessary to hold the result, and update
4537 remote_send (char **buf
,
4541 getpkt (buf
, sizeof_buf
, 0);
4543 if ((*buf
)[0] == 'E')
4544 error (_("Remote failure reply: %s"), *buf
);
4547 /* Display a null-terminated packet on stdout, for debugging, using C
4551 print_packet (char *buf
)
4553 puts_filtered ("\"");
4554 fputstr_filtered (buf
, '"', gdb_stdout
);
4555 puts_filtered ("\"");
4561 return putpkt_binary (buf
, strlen (buf
));
4564 /* Send a packet to the remote machine, with error checking. The data
4565 of the packet is in BUF. The string in BUF can be at most
4566 get_remote_packet_size () - 5 to account for the $, # and checksum,
4567 and for a possible /0 if we are debugging (remote_debug) and want
4568 to print the sent packet as a string. */
4571 putpkt_binary (char *buf
, int cnt
)
4574 unsigned char csum
= 0;
4575 char *buf2
= alloca (cnt
+ 6);
4581 /* Copy the packet into buffer BUF2, encapsulating it
4582 and giving it a checksum. */
4587 for (i
= 0; i
< cnt
; i
++)
4593 *p
++ = tohex ((csum
>> 4) & 0xf);
4594 *p
++ = tohex (csum
& 0xf);
4596 /* Send it over and over until we get a positive ack. */
4600 int started_error_output
= 0;
4605 fprintf_unfiltered (gdb_stdlog
, "Sending packet: ");
4606 fputstrn_unfiltered (buf2
, p
- buf2
, 0, gdb_stdlog
);
4607 fprintf_unfiltered (gdb_stdlog
, "...");
4608 gdb_flush (gdb_stdlog
);
4610 if (serial_write (remote_desc
, buf2
, p
- buf2
))
4611 perror_with_name (_("putpkt: write failed"));
4613 /* Read until either a timeout occurs (-2) or '+' is read. */
4616 ch
= readchar (remote_timeout
);
4624 case SERIAL_TIMEOUT
:
4626 if (started_error_output
)
4628 putchar_unfiltered ('\n');
4629 started_error_output
= 0;
4638 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
4642 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
4643 case SERIAL_TIMEOUT
:
4647 break; /* Retransmit buffer. */
4651 fprintf_unfiltered (gdb_stdlog
,
4652 "Packet instead of Ack, ignoring it\n");
4653 /* It's probably an old response sent because an ACK
4654 was lost. Gobble up the packet and ack it so it
4655 doesn't get retransmitted when we resend this
4658 serial_write (remote_desc
, "+", 1);
4659 continue; /* Now, go look for +. */
4664 if (!started_error_output
)
4666 started_error_output
= 1;
4667 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
4669 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
4673 break; /* Here to retransmit. */
4677 /* This is wrong. If doing a long backtrace, the user should be
4678 able to get out next time we call QUIT, without anything as
4679 violent as interrupt_query. If we want to provide a way out of
4680 here without getting to the next QUIT, it should be based on
4681 hitting ^C twice as in remote_wait. */
4691 /* Come here after finding the start of a frame when we expected an
4692 ack. Do our best to discard the rest of this packet. */
4701 c
= readchar (remote_timeout
);
4704 case SERIAL_TIMEOUT
:
4705 /* Nothing we can do. */
4708 /* Discard the two bytes of checksum and stop. */
4709 c
= readchar (remote_timeout
);
4711 c
= readchar (remote_timeout
);
4714 case '*': /* Run length encoding. */
4715 /* Discard the repeat count. */
4716 c
= readchar (remote_timeout
);
4721 /* A regular character. */
4727 /* Come here after finding the start of the frame. Collect the rest
4728 into *BUF, verifying the checksum, length, and handling run-length
4729 compression. NUL terminate the buffer. If there is not enough room,
4730 expand *BUF using xrealloc.
4732 Returns -1 on error, number of characters in buffer (ignoring the
4733 trailing NULL) on success. (could be extended to return one of the
4734 SERIAL status indications). */
4737 read_frame (char **buf_p
,
4750 c
= readchar (remote_timeout
);
4753 case SERIAL_TIMEOUT
:
4755 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
4759 fputs_filtered ("Saw new packet start in middle of old one\n",
4761 return -1; /* Start a new packet, count retries. */
4764 unsigned char pktcsum
;
4770 check_0
= readchar (remote_timeout
);
4772 check_1
= readchar (remote_timeout
);
4774 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
4777 fputs_filtered ("Timeout in checksum, retrying\n",
4781 else if (check_0
< 0 || check_1
< 0)
4784 fputs_filtered ("Communication error in checksum\n",
4789 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
4790 if (csum
== pktcsum
)
4795 fprintf_filtered (gdb_stdlog
,
4796 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
4798 fputstrn_filtered (buf
, bc
, 0, gdb_stdlog
);
4799 fputs_filtered ("\n", gdb_stdlog
);
4801 /* Number of characters in buffer ignoring trailing
4805 case '*': /* Run length encoding. */
4810 c
= readchar (remote_timeout
);
4812 repeat
= c
- ' ' + 3; /* Compute repeat count. */
4814 /* The character before ``*'' is repeated. */
4816 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
4818 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
4820 /* Make some more room in the buffer. */
4821 *sizeof_buf
+= repeat
;
4822 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
4826 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
4832 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
4836 if (bc
>= *sizeof_buf
- 1)
4838 /* Make some more room in the buffer. */
4840 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
4851 /* Read a packet from the remote machine, with error checking, and
4852 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
4853 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
4854 rather than timing out; this is used (in synchronous mode) to wait
4855 for a target that is is executing user code to stop. */
4856 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
4857 don't have to change all the calls to getpkt to deal with the
4858 return value, because at the moment I don't know what the right
4859 thing to do it for those. */
4867 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
4871 /* Read a packet from the remote machine, with error checking, and
4872 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
4873 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
4874 rather than timing out; this is used (in synchronous mode) to wait
4875 for a target that is is executing user code to stop. If FOREVER ==
4876 0, this function is allowed to time out gracefully and return an
4877 indication of this to the caller. Otherwise return the number
4880 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
4887 strcpy (*buf
, "timeout");
4891 timeout
= watchdog
> 0 ? watchdog
: -1;
4895 timeout
= remote_timeout
;
4899 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
4901 /* This can loop forever if the remote side sends us characters
4902 continuously, but if it pauses, we'll get a zero from
4903 readchar because of timeout. Then we'll count that as a
4906 /* Note that we will only wait forever prior to the start of a
4907 packet. After that, we expect characters to arrive at a
4908 brisk pace. They should show up within remote_timeout
4913 c
= readchar (timeout
);
4915 if (c
== SERIAL_TIMEOUT
)
4917 if (forever
) /* Watchdog went off? Kill the target. */
4920 target_mourn_inferior ();
4921 error (_("Watchdog has expired. Target detached."));
4924 fputs_filtered ("Timed out.\n", gdb_stdlog
);
4930 /* We've found the start of a packet, now collect the data. */
4932 val
= read_frame (buf
, sizeof_buf
);
4938 fprintf_unfiltered (gdb_stdlog
, "Packet received: ");
4939 fputstrn_unfiltered (*buf
, val
, 0, gdb_stdlog
);
4940 fprintf_unfiltered (gdb_stdlog
, "\n");
4942 serial_write (remote_desc
, "+", 1);
4946 /* Try the whole thing again. */
4948 serial_write (remote_desc
, "-", 1);
4951 /* We have tried hard enough, and just can't receive the packet.
4954 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
4955 serial_write (remote_desc
, "+", 1);
4962 /* For some mysterious reason, wait_for_inferior calls kill instead of
4963 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4967 target_mourn_inferior ();
4971 /* Use catch_errors so the user can quit from gdb even when we aren't on
4972 speaking terms with the remote system. */
4973 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4975 /* Don't wait for it to die. I'm not really sure it matters whether
4976 we do or not. For the existing stubs, kill is a noop. */
4977 target_mourn_inferior ();
4980 /* Async version of remote_kill. */
4982 remote_async_kill (void)
4984 /* Unregister the file descriptor from the event loop. */
4985 if (target_is_async_p ())
4986 serial_async (remote_desc
, NULL
, 0);
4988 /* For some mysterious reason, wait_for_inferior calls kill instead of
4989 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4993 target_mourn_inferior ();
4997 /* Use catch_errors so the user can quit from gdb even when we
4998 aren't on speaking terms with the remote system. */
4999 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
5001 /* Don't wait for it to die. I'm not really sure it matters whether
5002 we do or not. For the existing stubs, kill is a noop. */
5003 target_mourn_inferior ();
5009 remote_mourn_1 (&remote_ops
);
5013 remote_async_mourn (void)
5015 remote_mourn_1 (&remote_async_ops
);
5019 extended_remote_mourn (void)
5021 /* We do _not_ want to mourn the target like this; this will
5022 remove the extended remote target from the target stack,
5023 and the next time the user says "run" it'll fail.
5025 FIXME: What is the right thing to do here? */
5027 remote_mourn_1 (&extended_remote_ops
);
5031 /* Worker function for remote_mourn. */
5033 remote_mourn_1 (struct target_ops
*target
)
5035 unpush_target (target
);
5036 generic_mourn_inferior ();
5039 /* In the extended protocol we want to be able to do things like
5040 "run" and have them basically work as expected. So we need
5041 a special create_inferior function.
5043 FIXME: One day add support for changing the exec file
5044 we're debugging, arguments and an environment. */
5047 extended_remote_create_inferior (char *exec_file
, char *args
,
5048 char **env
, int from_tty
)
5050 /* Rip out the breakpoints; we'll reinsert them after restarting
5051 the remote server. */
5052 remove_breakpoints ();
5054 /* Now restart the remote server. */
5055 extended_remote_restart ();
5057 /* NOTE: We don't need to recheck for a target description here; but
5058 if we gain the ability to switch the remote executable we may
5059 need to, if for instance we are running a process which requested
5060 different emulated hardware from the operating system. A
5061 concrete example of this is ARM GNU/Linux, where some binaries
5062 will have a legacy FPA coprocessor emulated and others may have
5063 access to a hardware VFP unit. */
5065 /* Now put the breakpoints back in. This way we're safe if the
5066 restart function works via a unix fork on the remote side. */
5067 insert_breakpoints ();
5069 /* Clean up from the last time we were running. */
5070 clear_proceed_status ();
5073 /* Async version of extended_remote_create_inferior. */
5075 extended_remote_async_create_inferior (char *exec_file
, char *args
,
5076 char **env
, int from_tty
)
5078 /* Rip out the breakpoints; we'll reinsert them after restarting
5079 the remote server. */
5080 remove_breakpoints ();
5082 /* If running asynchronously, register the target file descriptor
5083 with the event loop. */
5084 if (target_can_async_p ())
5085 target_async (inferior_event_handler
, 0);
5087 /* Now restart the remote server. */
5088 extended_remote_restart ();
5090 /* NOTE: We don't need to recheck for a target description here; but
5091 if we gain the ability to switch the remote executable we may
5092 need to, if for instance we are running a process which requested
5093 different emulated hardware from the operating system. A
5094 concrete example of this is ARM GNU/Linux, where some binaries
5095 will have a legacy FPA coprocessor emulated and others may have
5096 access to a hardware VFP unit. */
5098 /* Now put the breakpoints back in. This way we're safe if the
5099 restart function works via a unix fork on the remote side. */
5100 insert_breakpoints ();
5102 /* Clean up from the last time we were running. */
5103 clear_proceed_status ();
5107 /* Insert a breakpoint. On targets that have software breakpoint
5108 support, we ask the remote target to do the work; on targets
5109 which don't, we insert a traditional memory breakpoint. */
5112 remote_insert_breakpoint (struct bp_target_info
*bp_tgt
)
5114 CORE_ADDR addr
= bp_tgt
->placed_address
;
5115 struct remote_state
*rs
= get_remote_state ();
5117 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
5118 If it succeeds, then set the support to PACKET_ENABLE. If it
5119 fails, and the user has explicitly requested the Z support then
5120 report an error, otherwise, mark it disabled and go on. */
5122 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
5129 BREAKPOINT_FROM_PC (&bp_tgt
->placed_address
, &bp_tgt
->placed_size
);
5130 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
5131 p
+= hexnumstr (p
, addr
);
5132 sprintf (p
, ",%d", bp_tgt
->placed_size
);
5135 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5137 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
5143 case PACKET_UNKNOWN
:
5148 return memory_insert_breakpoint (bp_tgt
);
5152 remote_remove_breakpoint (struct bp_target_info
*bp_tgt
)
5154 CORE_ADDR addr
= bp_tgt
->placed_address
;
5155 struct remote_state
*rs
= get_remote_state ();
5158 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
5166 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
5167 p
+= hexnumstr (p
, addr
);
5168 sprintf (p
, ",%d", bp_tgt
->placed_size
);
5171 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5173 return (rs
->buf
[0] == 'E');
5176 return memory_remove_breakpoint (bp_tgt
);
5180 watchpoint_to_Z_packet (int type
)
5185 return Z_PACKET_WRITE_WP
;
5188 return Z_PACKET_READ_WP
;
5191 return Z_PACKET_ACCESS_WP
;
5194 internal_error (__FILE__
, __LINE__
,
5195 _("hw_bp_to_z: bad watchpoint type %d"), type
);
5200 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
5202 struct remote_state
*rs
= get_remote_state ();
5204 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
5206 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
5209 sprintf (rs
->buf
, "Z%x,", packet
);
5210 p
= strchr (rs
->buf
, '\0');
5211 addr
= remote_address_masked (addr
);
5212 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5213 sprintf (p
, ",%x", len
);
5216 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5218 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
5221 case PACKET_UNKNOWN
:
5226 internal_error (__FILE__
, __LINE__
,
5227 _("remote_insert_watchpoint: reached end of function"));
5232 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
5234 struct remote_state
*rs
= get_remote_state ();
5236 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
5238 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
5241 sprintf (rs
->buf
, "z%x,", packet
);
5242 p
= strchr (rs
->buf
, '\0');
5243 addr
= remote_address_masked (addr
);
5244 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5245 sprintf (p
, ",%x", len
);
5247 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5249 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
5252 case PACKET_UNKNOWN
:
5257 internal_error (__FILE__
, __LINE__
,
5258 _("remote_remove_watchpoint: reached end of function"));
5262 int remote_hw_watchpoint_limit
= -1;
5263 int remote_hw_breakpoint_limit
= -1;
5266 remote_check_watch_resources (int type
, int cnt
, int ot
)
5268 if (type
== bp_hardware_breakpoint
)
5270 if (remote_hw_breakpoint_limit
== 0)
5272 else if (remote_hw_breakpoint_limit
< 0)
5274 else if (cnt
<= remote_hw_breakpoint_limit
)
5279 if (remote_hw_watchpoint_limit
== 0)
5281 else if (remote_hw_watchpoint_limit
< 0)
5285 else if (cnt
<= remote_hw_watchpoint_limit
)
5292 remote_stopped_by_watchpoint (void)
5294 return remote_stopped_by_watchpoint_p
;
5297 extern int stepped_after_stopped_by_watchpoint
;
5300 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
5303 if (remote_stopped_by_watchpoint ()
5304 || stepped_after_stopped_by_watchpoint
)
5306 *addr_p
= remote_watch_data_address
;
5315 remote_insert_hw_breakpoint (struct bp_target_info
*bp_tgt
)
5318 struct remote_state
*rs
= get_remote_state ();
5321 /* The length field should be set to the size of a breakpoint
5322 instruction, even though we aren't inserting one ourselves. */
5324 BREAKPOINT_FROM_PC (&bp_tgt
->placed_address
, &bp_tgt
->placed_size
);
5326 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
5333 addr
= remote_address_masked (bp_tgt
->placed_address
);
5334 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5335 sprintf (p
, ",%x", bp_tgt
->placed_size
);
5338 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5340 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
5343 case PACKET_UNKNOWN
:
5348 internal_error (__FILE__
, __LINE__
,
5349 _("remote_insert_hw_breakpoint: reached end of function"));
5354 remote_remove_hw_breakpoint (struct bp_target_info
*bp_tgt
)
5357 struct remote_state
*rs
= get_remote_state ();
5360 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
5367 addr
= remote_address_masked (bp_tgt
->placed_address
);
5368 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5369 sprintf (p
, ",%x", bp_tgt
->placed_size
);
5372 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5374 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
5377 case PACKET_UNKNOWN
:
5382 internal_error (__FILE__
, __LINE__
,
5383 _("remote_remove_hw_breakpoint: reached end of function"));
5386 /* Some targets are only capable of doing downloads, and afterwards
5387 they switch to the remote serial protocol. This function provides
5388 a clean way to get from the download target to the remote target.
5389 It's basically just a wrapper so that we don't have to expose any
5390 of the internal workings of remote.c.
5392 Prior to calling this routine, you should shutdown the current
5393 target code, else you will get the "A program is being debugged
5394 already..." message. Usually a call to pop_target() suffices. */
5397 push_remote_target (char *name
, int from_tty
)
5399 printf_filtered (_("Switching to remote protocol\n"));
5400 remote_open (name
, from_tty
);
5403 /* Table used by the crc32 function to calcuate the checksum. */
5405 static unsigned long crc32_table
[256] =
5408 static unsigned long
5409 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
5411 if (!crc32_table
[1])
5413 /* Initialize the CRC table and the decoding table. */
5417 for (i
= 0; i
< 256; i
++)
5419 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
5420 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
5427 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
5433 /* compare-sections command
5435 With no arguments, compares each loadable section in the exec bfd
5436 with the same memory range on the target, and reports mismatches.
5437 Useful for verifying the image on the target against the exec file.
5438 Depends on the target understanding the new "qCRC:" request. */
5440 /* FIXME: cagney/1999-10-26: This command should be broken down into a
5441 target method (target verify memory) and generic version of the
5442 actual command. This will allow other high-level code (especially
5443 generic_load()) to make use of this target functionality. */
5446 compare_sections_command (char *args
, int from_tty
)
5448 struct remote_state
*rs
= get_remote_state ();
5450 unsigned long host_crc
, target_crc
;
5451 extern bfd
*exec_bfd
;
5452 struct cleanup
*old_chain
;
5455 const char *sectname
;
5462 error (_("command cannot be used without an exec file"));
5463 if (!current_target
.to_shortname
||
5464 strcmp (current_target
.to_shortname
, "remote") != 0)
5465 error (_("command can only be used with remote target"));
5467 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
5469 if (!(s
->flags
& SEC_LOAD
))
5470 continue; /* skip non-loadable section */
5472 size
= bfd_get_section_size (s
);
5474 continue; /* skip zero-length section */
5476 sectname
= bfd_get_section_name (exec_bfd
, s
);
5477 if (args
&& strcmp (args
, sectname
) != 0)
5478 continue; /* not the section selected by user */
5480 matched
= 1; /* do this section */
5482 /* FIXME: assumes lma can fit into long. */
5483 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
5484 (long) lma
, (long) size
);
5487 /* Be clever; compute the host_crc before waiting for target
5489 sectdata
= xmalloc (size
);
5490 old_chain
= make_cleanup (xfree
, sectdata
);
5491 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
5492 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
5494 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5495 if (rs
->buf
[0] == 'E')
5496 error (_("target memory fault, section %s, range 0x%s -- 0x%s"),
5497 sectname
, paddr (lma
), paddr (lma
+ size
));
5498 if (rs
->buf
[0] != 'C')
5499 error (_("remote target does not support this operation"));
5501 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
5502 target_crc
= target_crc
* 16 + fromhex (*tmp
);
5504 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
5505 sectname
, paddr (lma
), paddr (lma
+ size
));
5506 if (host_crc
== target_crc
)
5507 printf_filtered ("matched.\n");
5510 printf_filtered ("MIS-MATCHED!\n");
5514 do_cleanups (old_chain
);
5517 warning (_("One or more sections of the remote executable does not match\n\
5518 the loaded file\n"));
5519 if (args
&& !matched
)
5520 printf_filtered (_("No loaded section named '%s'.\n"), args
);
5523 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
5524 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
5525 number of bytes read is returned, or 0 for EOF, or -1 for error.
5526 The number of bytes read may be less than LEN without indicating an
5527 EOF. PACKET is checked and updated to indicate whether the remote
5528 target supports this object. */
5531 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
5533 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
5534 struct packet_config
*packet
)
5536 static char *finished_object
;
5537 static char *finished_annex
;
5538 static ULONGEST finished_offset
;
5540 struct remote_state
*rs
= get_remote_state ();
5541 unsigned int total
= 0;
5542 LONGEST i
, n
, packet_len
;
5544 if (packet
->support
== PACKET_DISABLE
)
5547 /* Check whether we've cached an end-of-object packet that matches
5549 if (finished_object
)
5551 if (strcmp (object_name
, finished_object
) == 0
5552 && strcmp (annex
? annex
: "", finished_annex
) == 0
5553 && offset
== finished_offset
)
5556 /* Otherwise, we're now reading something different. Discard
5558 xfree (finished_object
);
5559 xfree (finished_annex
);
5560 finished_object
= NULL
;
5561 finished_annex
= NULL
;
5564 /* Request only enough to fit in a single packet. The actual data
5565 may not, since we don't know how much of it will need to be escaped;
5566 the target is free to respond with slightly less data. We subtract
5567 five to account for the response type and the protocol frame. */
5568 n
= min (get_remote_packet_size () - 5, len
);
5569 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
5570 object_name
, annex
? annex
: "",
5571 phex_nz (offset
, sizeof offset
),
5572 phex_nz (n
, sizeof n
));
5573 i
= putpkt (rs
->buf
);
5578 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
5579 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
5582 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
5583 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
5585 /* 'm' means there is (or at least might be) more data after this
5586 batch. That does not make sense unless there's at least one byte
5587 of data in this reply. */
5588 if (rs
->buf
[0] == 'm' && packet_len
== 1)
5589 error (_("Remote qXfer reply contained no data."));
5591 /* Got some data. */
5592 i
= remote_unescape_input (rs
->buf
+ 1, packet_len
- 1, readbuf
, n
);
5594 /* 'l' is an EOF marker, possibly including a final block of data,
5595 or possibly empty. Record it to bypass the next read, if one is
5597 if (rs
->buf
[0] == 'l')
5599 finished_object
= xstrdup (object_name
);
5600 finished_annex
= xstrdup (annex
? annex
: "");
5601 finished_offset
= offset
+ i
;
5608 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
5609 const char *annex
, gdb_byte
*readbuf
,
5610 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
5612 struct remote_state
*rs
= get_remote_state ();
5617 /* Handle memory using the standard memory routines. */
5618 if (object
== TARGET_OBJECT_MEMORY
)
5623 if (writebuf
!= NULL
)
5624 xfered
= remote_write_bytes (offset
, writebuf
, len
);
5626 xfered
= remote_read_bytes (offset
, readbuf
, len
);
5630 else if (xfered
== 0 && errno
== 0)
5636 /* Only handle flash writes. */
5637 if (writebuf
!= NULL
)
5643 case TARGET_OBJECT_FLASH
:
5644 xfered
= remote_flash_write (ops
, offset
, len
, writebuf
);
5648 else if (xfered
== 0 && errno
== 0)
5658 /* Map pre-existing objects onto letters. DO NOT do this for new
5659 objects!!! Instead specify new query packets. */
5662 case TARGET_OBJECT_AVR
:
5666 case TARGET_OBJECT_AUXV
:
5667 gdb_assert (annex
== NULL
);
5668 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
5669 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
5671 case TARGET_OBJECT_AVAILABLE_FEATURES
:
5672 return remote_read_qxfer
5673 (ops
, "features", annex
, readbuf
, offset
, len
,
5674 &remote_protocol_packets
[PACKET_qXfer_features
]);
5676 case TARGET_OBJECT_MEMORY_MAP
:
5677 gdb_assert (annex
== NULL
);
5678 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
5679 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
5685 /* Note: a zero OFFSET and LEN can be used to query the minimum
5687 if (offset
== 0 && len
== 0)
5688 return (get_remote_packet_size ());
5689 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
5690 large enough let the caller deal with it. */
5691 if (len
< get_remote_packet_size ())
5693 len
= get_remote_packet_size ();
5695 /* Except for querying the minimum buffer size, target must be open. */
5697 error (_("remote query is only available after target open"));
5699 gdb_assert (annex
!= NULL
);
5700 gdb_assert (readbuf
!= NULL
);
5706 /* We used one buffer char for the remote protocol q command and
5707 another for the query type. As the remote protocol encapsulation
5708 uses 4 chars plus one extra in case we are debugging
5709 (remote_debug), we have PBUFZIZ - 7 left to pack the query
5712 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
5714 /* Bad caller may have sent forbidden characters. */
5715 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
5720 gdb_assert (annex
[i
] == '\0');
5722 i
= putpkt (rs
->buf
);
5726 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5727 strcpy ((char *) readbuf
, rs
->buf
);
5729 return strlen ((char *) readbuf
);
5733 remote_rcmd (char *command
,
5734 struct ui_file
*outbuf
)
5736 struct remote_state
*rs
= get_remote_state ();
5740 error (_("remote rcmd is only available after target open"));
5742 /* Send a NULL command across as an empty command. */
5743 if (command
== NULL
)
5746 /* The query prefix. */
5747 strcpy (rs
->buf
, "qRcmd,");
5748 p
= strchr (rs
->buf
, '\0');
5750 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/) > get_remote_packet_size ())
5751 error (_("\"monitor\" command ``%s'' is too long."), command
);
5753 /* Encode the actual command. */
5754 bin2hex ((gdb_byte
*) command
, p
, 0);
5756 if (putpkt (rs
->buf
) < 0)
5757 error (_("Communication problem with target."));
5759 /* get/display the response */
5764 /* XXX - see also tracepoint.c:remote_get_noisy_reply(). */
5766 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5769 error (_("Target does not support this command."));
5770 if (buf
[0] == 'O' && buf
[1] != 'K')
5772 remote_console_output (buf
+ 1); /* 'O' message from stub. */
5775 if (strcmp (buf
, "OK") == 0)
5777 if (strlen (buf
) == 3 && buf
[0] == 'E'
5778 && isdigit (buf
[1]) && isdigit (buf
[2]))
5780 error (_("Protocol error with Rcmd"));
5782 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
5784 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
5785 fputc_unfiltered (c
, outbuf
);
5791 static VEC(mem_region_s
) *
5792 remote_memory_map (struct target_ops
*ops
)
5794 VEC(mem_region_s
) *result
= NULL
;
5795 char *text
= target_read_stralloc (¤t_target
,
5796 TARGET_OBJECT_MEMORY_MAP
, NULL
);
5800 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
5801 result
= parse_memory_map (text
);
5802 do_cleanups (back_to
);
5809 packet_command (char *args
, int from_tty
)
5811 struct remote_state
*rs
= get_remote_state ();
5814 error (_("command can only be used with remote target"));
5817 error (_("remote-packet command requires packet text as argument"));
5819 puts_filtered ("sending: ");
5820 print_packet (args
);
5821 puts_filtered ("\n");
5824 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5825 puts_filtered ("received: ");
5826 print_packet (rs
->buf
);
5827 puts_filtered ("\n");
5831 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
5833 static void display_thread_info (struct gdb_ext_thread_info
*info
);
5835 static void threadset_test_cmd (char *cmd
, int tty
);
5837 static void threadalive_test (char *cmd
, int tty
);
5839 static void threadlist_test_cmd (char *cmd
, int tty
);
5841 int get_and_display_threadinfo (threadref
*ref
);
5843 static void threadinfo_test_cmd (char *cmd
, int tty
);
5845 static int thread_display_step (threadref
*ref
, void *context
);
5847 static void threadlist_update_test_cmd (char *cmd
, int tty
);
5849 static void init_remote_threadtests (void);
5851 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
5854 threadset_test_cmd (char *cmd
, int tty
)
5856 int sample_thread
= SAMPLE_THREAD
;
5858 printf_filtered (_("Remote threadset test\n"));
5859 set_thread (sample_thread
, 1);
5864 threadalive_test (char *cmd
, int tty
)
5866 int sample_thread
= SAMPLE_THREAD
;
5868 if (remote_thread_alive (pid_to_ptid (sample_thread
)))
5869 printf_filtered ("PASS: Thread alive test\n");
5871 printf_filtered ("FAIL: Thread alive test\n");
5874 void output_threadid (char *title
, threadref
*ref
);
5877 output_threadid (char *title
, threadref
*ref
)
5881 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
5883 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
5887 threadlist_test_cmd (char *cmd
, int tty
)
5890 threadref nextthread
;
5891 int done
, result_count
;
5892 threadref threadlist
[3];
5894 printf_filtered ("Remote Threadlist test\n");
5895 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
5896 &result_count
, &threadlist
[0]))
5897 printf_filtered ("FAIL: threadlist test\n");
5900 threadref
*scan
= threadlist
;
5901 threadref
*limit
= scan
+ result_count
;
5903 while (scan
< limit
)
5904 output_threadid (" thread ", scan
++);
5909 display_thread_info (struct gdb_ext_thread_info
*info
)
5911 output_threadid ("Threadid: ", &info
->threadid
);
5912 printf_filtered ("Name: %s\n ", info
->shortname
);
5913 printf_filtered ("State: %s\n", info
->display
);
5914 printf_filtered ("other: %s\n\n", info
->more_display
);
5918 get_and_display_threadinfo (threadref
*ref
)
5922 struct gdb_ext_thread_info threadinfo
;
5924 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
5925 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
5926 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
5927 display_thread_info (&threadinfo
);
5932 threadinfo_test_cmd (char *cmd
, int tty
)
5934 int athread
= SAMPLE_THREAD
;
5938 int_to_threadref (&thread
, athread
);
5939 printf_filtered ("Remote Threadinfo test\n");
5940 if (!get_and_display_threadinfo (&thread
))
5941 printf_filtered ("FAIL cannot get thread info\n");
5945 thread_display_step (threadref
*ref
, void *context
)
5947 /* output_threadid(" threadstep ",ref); *//* simple test */
5948 return get_and_display_threadinfo (ref
);
5952 threadlist_update_test_cmd (char *cmd
, int tty
)
5954 printf_filtered ("Remote Threadlist update test\n");
5955 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
5959 init_remote_threadtests (void)
5961 add_com ("tlist", class_obscure
, threadlist_test_cmd
, _("\
5962 Fetch and print the remote list of thread identifiers, one pkt only"));
5963 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
5964 _("Fetch and display info about one thread"));
5965 add_com ("tset", class_obscure
, threadset_test_cmd
,
5966 _("Test setting to a different thread"));
5967 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
5968 _("Iterate through updating all remote thread info"));
5969 add_com ("talive", class_obscure
, threadalive_test
,
5970 _(" Remote thread alive test "));
5975 /* Convert a thread ID to a string. Returns the string in a static
5979 remote_pid_to_str (ptid_t ptid
)
5981 static char buf
[32];
5983 xsnprintf (buf
, sizeof buf
, "Thread %d", ptid_get_pid (ptid
));
5987 /* Get the address of the thread local variable in OBJFILE which is
5988 stored at OFFSET within the thread local storage for thread PTID. */
5991 remote_get_thread_local_address (ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
5993 if (remote_protocol_packets
[PACKET_qGetTLSAddr
].support
!= PACKET_DISABLE
)
5995 struct remote_state
*rs
= get_remote_state ();
5997 enum packet_result result
;
5999 strcpy (p
, "qGetTLSAddr:");
6001 p
+= hexnumstr (p
, PIDGET (ptid
));
6003 p
+= hexnumstr (p
, offset
);
6005 p
+= hexnumstr (p
, lm
);
6009 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6010 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
6011 if (result
== PACKET_OK
)
6015 unpack_varlen_hex (rs
->buf
, &result
);
6018 else if (result
== PACKET_UNKNOWN
)
6019 throw_error (TLS_GENERIC_ERROR
,
6020 _("Remote target doesn't support qGetTLSAddr packet"));
6022 throw_error (TLS_GENERIC_ERROR
,
6023 _("Remote target failed to process qGetTLSAddr request"));
6026 throw_error (TLS_GENERIC_ERROR
,
6027 _("TLS not supported or disabled on this target"));
6032 /* Support for inferring a target description based on the current
6033 architecture and the size of a 'g' packet. While the 'g' packet
6034 can have any size (since optional registers can be left off the
6035 end), some sizes are easily recognizable given knowledge of the
6036 approximate architecture. */
6038 struct remote_g_packet_guess
6041 const struct target_desc
*tdesc
;
6043 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
6044 DEF_VEC_O(remote_g_packet_guess_s
);
6046 struct remote_g_packet_data
6048 VEC(remote_g_packet_guess_s
) *guesses
;
6051 static struct gdbarch_data
*remote_g_packet_data_handle
;
6054 remote_g_packet_data_init (struct obstack
*obstack
)
6056 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
6060 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
6061 const struct target_desc
*tdesc
)
6063 struct remote_g_packet_data
*data
6064 = gdbarch_data (gdbarch
, remote_g_packet_data_handle
);
6065 struct remote_g_packet_guess new_guess
, *guess
;
6068 gdb_assert (tdesc
!= NULL
);
6071 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
6073 if (guess
->bytes
== bytes
)
6074 internal_error (__FILE__
, __LINE__
,
6075 "Duplicate g packet description added for size %d",
6078 new_guess
.bytes
= bytes
;
6079 new_guess
.tdesc
= tdesc
;
6080 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
6083 static const struct target_desc
*
6084 remote_read_description (struct target_ops
*target
)
6086 struct remote_g_packet_data
*data
6087 = gdbarch_data (current_gdbarch
, remote_g_packet_data_handle
);
6089 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
6091 struct remote_g_packet_guess
*guess
;
6093 int bytes
= send_g_packet ();
6096 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
6098 if (guess
->bytes
== bytes
)
6099 return guess
->tdesc
;
6101 /* We discard the g packet. A minor optimization would be to
6102 hold on to it, and fill the register cache once we have selected
6103 an architecture, but it's too tricky to do safely. */
6110 init_remote_ops (void)
6112 remote_ops
.to_shortname
= "remote";
6113 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
6115 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
6116 Specify the serial device it is connected to\n\
6117 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
6118 remote_ops
.to_open
= remote_open
;
6119 remote_ops
.to_close
= remote_close
;
6120 remote_ops
.to_detach
= remote_detach
;
6121 remote_ops
.to_disconnect
= remote_disconnect
;
6122 remote_ops
.to_resume
= remote_resume
;
6123 remote_ops
.to_wait
= remote_wait
;
6124 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
6125 remote_ops
.to_store_registers
= remote_store_registers
;
6126 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
6127 remote_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
6128 remote_ops
.to_files_info
= remote_files_info
;
6129 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
6130 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
6131 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
6132 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
6133 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
6134 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
6135 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
6136 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
6137 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
6138 remote_ops
.to_kill
= remote_kill
;
6139 remote_ops
.to_load
= generic_load
;
6140 remote_ops
.to_mourn_inferior
= remote_mourn
;
6141 remote_ops
.to_thread_alive
= remote_thread_alive
;
6142 remote_ops
.to_find_new_threads
= remote_threads_info
;
6143 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
6144 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
6145 remote_ops
.to_stop
= remote_stop
;
6146 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
6147 remote_ops
.to_rcmd
= remote_rcmd
;
6148 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
6149 remote_ops
.to_stratum
= process_stratum
;
6150 remote_ops
.to_has_all_memory
= 1;
6151 remote_ops
.to_has_memory
= 1;
6152 remote_ops
.to_has_stack
= 1;
6153 remote_ops
.to_has_registers
= 1;
6154 remote_ops
.to_has_execution
= 1;
6155 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
6156 remote_ops
.to_magic
= OPS_MAGIC
;
6157 remote_ops
.to_memory_map
= remote_memory_map
;
6158 remote_ops
.to_flash_erase
= remote_flash_erase
;
6159 remote_ops
.to_flash_done
= remote_flash_done
;
6160 remote_ops
.to_read_description
= remote_read_description
;
6163 /* Set up the extended remote vector by making a copy of the standard
6164 remote vector and adding to it. */
6167 init_extended_remote_ops (void)
6169 extended_remote_ops
= remote_ops
;
6171 extended_remote_ops
.to_shortname
= "extended-remote";
6172 extended_remote_ops
.to_longname
=
6173 "Extended remote serial target in gdb-specific protocol";
6174 extended_remote_ops
.to_doc
=
6175 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
6176 Specify the serial device it is connected to (e.g. /dev/ttya).",
6177 extended_remote_ops
.to_open
= extended_remote_open
;
6178 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
6179 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
6183 remote_can_async_p (void)
6185 /* We're async whenever the serial device is. */
6186 return (current_target
.to_async_mask_value
) && serial_can_async_p (remote_desc
);
6190 remote_is_async_p (void)
6192 /* We're async whenever the serial device is. */
6193 return (current_target
.to_async_mask_value
) && serial_is_async_p (remote_desc
);
6196 /* Pass the SERIAL event on and up to the client. One day this code
6197 will be able to delay notifying the client of an event until the
6198 point where an entire packet has been received. */
6200 static void (*async_client_callback
) (enum inferior_event_type event_type
,
6202 static void *async_client_context
;
6203 static serial_event_ftype remote_async_serial_handler
;
6206 remote_async_serial_handler (struct serial
*scb
, void *context
)
6208 /* Don't propogate error information up to the client. Instead let
6209 the client find out about the error by querying the target. */
6210 async_client_callback (INF_REG_EVENT
, async_client_context
);
6214 remote_async (void (*callback
) (enum inferior_event_type event_type
,
6215 void *context
), void *context
)
6217 if (current_target
.to_async_mask_value
== 0)
6218 internal_error (__FILE__
, __LINE__
,
6219 _("Calling remote_async when async is masked"));
6221 if (callback
!= NULL
)
6223 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
6224 async_client_callback
= callback
;
6225 async_client_context
= context
;
6228 serial_async (remote_desc
, NULL
, NULL
);
6231 /* Target async and target extended-async.
6233 This are temporary targets, until it is all tested. Eventually
6234 async support will be incorporated int the usual 'remote'
6238 init_remote_async_ops (void)
6240 remote_async_ops
.to_shortname
= "async";
6241 remote_async_ops
.to_longname
=
6242 "Remote serial target in async version of the gdb-specific protocol";
6243 remote_async_ops
.to_doc
=
6244 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
6245 Specify the serial device it is connected to (e.g. /dev/ttya).";
6246 remote_async_ops
.to_open
= remote_async_open
;
6247 remote_async_ops
.to_close
= remote_close
;
6248 remote_async_ops
.to_detach
= remote_detach
;
6249 remote_async_ops
.to_disconnect
= remote_disconnect
;
6250 remote_async_ops
.to_resume
= remote_async_resume
;
6251 remote_async_ops
.to_wait
= remote_async_wait
;
6252 remote_async_ops
.to_fetch_registers
= remote_fetch_registers
;
6253 remote_async_ops
.to_store_registers
= remote_store_registers
;
6254 remote_async_ops
.to_prepare_to_store
= remote_prepare_to_store
;
6255 remote_async_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
6256 remote_async_ops
.to_files_info
= remote_files_info
;
6257 remote_async_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
6258 remote_async_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
6259 remote_async_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
6260 remote_async_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
6261 remote_async_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
6262 remote_async_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
6263 remote_async_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
6264 remote_async_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
6265 remote_async_ops
.to_stopped_data_address
= remote_stopped_data_address
;
6266 remote_async_ops
.to_terminal_inferior
= remote_async_terminal_inferior
;
6267 remote_async_ops
.to_terminal_ours
= remote_async_terminal_ours
;
6268 remote_async_ops
.to_kill
= remote_async_kill
;
6269 remote_async_ops
.to_load
= generic_load
;
6270 remote_async_ops
.to_mourn_inferior
= remote_async_mourn
;
6271 remote_async_ops
.to_thread_alive
= remote_thread_alive
;
6272 remote_async_ops
.to_find_new_threads
= remote_threads_info
;
6273 remote_async_ops
.to_pid_to_str
= remote_pid_to_str
;
6274 remote_async_ops
.to_extra_thread_info
= remote_threads_extra_info
;
6275 remote_async_ops
.to_stop
= remote_stop
;
6276 remote_async_ops
.to_xfer_partial
= remote_xfer_partial
;
6277 remote_async_ops
.to_rcmd
= remote_rcmd
;
6278 remote_async_ops
.to_stratum
= process_stratum
;
6279 remote_async_ops
.to_has_all_memory
= 1;
6280 remote_async_ops
.to_has_memory
= 1;
6281 remote_async_ops
.to_has_stack
= 1;
6282 remote_async_ops
.to_has_registers
= 1;
6283 remote_async_ops
.to_has_execution
= 1;
6284 remote_async_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
6285 remote_async_ops
.to_can_async_p
= remote_can_async_p
;
6286 remote_async_ops
.to_is_async_p
= remote_is_async_p
;
6287 remote_async_ops
.to_async
= remote_async
;
6288 remote_async_ops
.to_async_mask_value
= 1;
6289 remote_async_ops
.to_magic
= OPS_MAGIC
;
6290 remote_async_ops
.to_memory_map
= remote_memory_map
;
6291 remote_async_ops
.to_flash_erase
= remote_flash_erase
;
6292 remote_async_ops
.to_flash_done
= remote_flash_done
;
6293 remote_ops
.to_read_description
= remote_read_description
;
6296 /* Set up the async extended remote vector by making a copy of the standard
6297 remote vector and adding to it. */
6300 init_extended_async_remote_ops (void)
6302 extended_async_remote_ops
= remote_async_ops
;
6304 extended_async_remote_ops
.to_shortname
= "extended-async";
6305 extended_async_remote_ops
.to_longname
=
6306 "Extended remote serial target in async gdb-specific protocol";
6307 extended_async_remote_ops
.to_doc
=
6308 "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
6309 Specify the serial device it is connected to (e.g. /dev/ttya).",
6310 extended_async_remote_ops
.to_open
= extended_remote_async_open
;
6311 extended_async_remote_ops
.to_create_inferior
= extended_remote_async_create_inferior
;
6312 extended_async_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
6316 set_remote_cmd (char *args
, int from_tty
)
6318 help_list (remote_set_cmdlist
, "set remote ", -1, gdb_stdout
);
6322 show_remote_cmd (char *args
, int from_tty
)
6324 /* We can't just use cmd_show_list here, because we want to skip
6325 the redundant "show remote Z-packet" and the legacy aliases. */
6326 struct cleanup
*showlist_chain
;
6327 struct cmd_list_element
*list
= remote_show_cmdlist
;
6329 showlist_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "showlist");
6330 for (; list
!= NULL
; list
= list
->next
)
6331 if (strcmp (list
->name
, "Z-packet") == 0)
6333 else if (list
->type
== not_set_cmd
)
6334 /* Alias commands are exactly like the original, except they
6335 don't have the normal type. */
6339 struct cleanup
*option_chain
6340 = make_cleanup_ui_out_tuple_begin_end (uiout
, "option");
6341 ui_out_field_string (uiout
, "name", list
->name
);
6342 ui_out_text (uiout
, ": ");
6343 if (list
->type
== show_cmd
)
6344 do_setshow_command ((char *) NULL
, from_tty
, list
);
6346 cmd_func (list
, NULL
, from_tty
);
6347 /* Close the tuple. */
6348 do_cleanups (option_chain
);
6351 /* Close the tuple. */
6352 do_cleanups (showlist_chain
);
6356 build_remote_gdbarch_data (void)
6358 remote_address_size
= TARGET_ADDR_BIT
;
6361 /* Saved pointer to previous owner of the new_objfile event. */
6362 static void (*remote_new_objfile_chain
) (struct objfile
*);
6364 /* Function to be called whenever a new objfile (shlib) is detected. */
6366 remote_new_objfile (struct objfile
*objfile
)
6368 if (remote_desc
!= 0) /* Have a remote connection. */
6370 remote_check_symbols (objfile
);
6372 /* Call predecessor on chain, if any. */
6373 if (remote_new_objfile_chain
)
6374 remote_new_objfile_chain (objfile
);
6378 _initialize_remote (void)
6380 struct remote_state
*rs
;
6382 /* architecture specific data */
6383 remote_gdbarch_data_handle
=
6384 gdbarch_data_register_post_init (init_remote_state
);
6385 remote_g_packet_data_handle
=
6386 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
6388 /* Old tacky stuff. NOTE: This comes after the remote protocol so
6389 that the remote protocol has been initialized. */
6390 DEPRECATED_REGISTER_GDBARCH_SWAP (remote_address_size
);
6391 deprecated_register_gdbarch_swap (NULL
, 0, build_remote_gdbarch_data
);
6393 /* Initialize the per-target state. At the moment there is only one
6394 of these, not one per target. Only one target is active at a
6395 time. The default buffer size is unimportant; it will be expanded
6396 whenever a larger buffer is needed. */
6397 rs
= get_remote_state_raw ();
6399 rs
->buf
= xmalloc (rs
->buf_size
);
6402 add_target (&remote_ops
);
6404 init_extended_remote_ops ();
6405 add_target (&extended_remote_ops
);
6407 init_remote_async_ops ();
6408 add_target (&remote_async_ops
);
6410 init_extended_async_remote_ops ();
6411 add_target (&extended_async_remote_ops
);
6413 /* Hook into new objfile notification. */
6414 remote_new_objfile_chain
= deprecated_target_new_objfile_hook
;
6415 deprecated_target_new_objfile_hook
= remote_new_objfile
;
6418 init_remote_threadtests ();
6421 /* set/show remote ... */
6423 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
6424 Remote protocol specific variables\n\
6425 Configure various remote-protocol specific variables such as\n\
6426 the packets being used"),
6427 &remote_set_cmdlist
, "set remote ",
6428 0 /* allow-unknown */, &setlist
);
6429 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
6430 Remote protocol specific variables\n\
6431 Configure various remote-protocol specific variables such as\n\
6432 the packets being used"),
6433 &remote_show_cmdlist
, "show remote ",
6434 0 /* allow-unknown */, &showlist
);
6436 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
6437 Compare section data on target to the exec file.\n\
6438 Argument is a single section name (default: all loaded sections)."),
6441 add_cmd ("packet", class_maintenance
, packet_command
, _("\
6442 Send an arbitrary packet to a remote target.\n\
6443 maintenance packet TEXT\n\
6444 If GDB is talking to an inferior via the GDB serial protocol, then\n\
6445 this command sends the string TEXT to the inferior, and displays the\n\
6446 response packet. GDB supplies the initial `$' character, and the\n\
6447 terminating `#' character and checksum."),
6450 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
6451 Set whether to send break if interrupted."), _("\
6452 Show whether to send break if interrupted."), _("\
6453 If set, a break, instead of a cntrl-c, is sent to the remote target."),
6454 NULL
, NULL
, /* FIXME: i18n: Whether to send break if interrupted is %s. */
6455 &setlist
, &showlist
);
6457 /* Install commands for configuring memory read/write packets. */
6459 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
6460 Set the maximum number of bytes per memory write packet (deprecated)."),
6462 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
6463 Show the maximum number of bytes per memory write packet (deprecated)."),
6465 add_cmd ("memory-write-packet-size", no_class
,
6466 set_memory_write_packet_size
, _("\
6467 Set the maximum number of bytes per memory-write packet.\n\
6468 Specify the number of bytes in a packet or 0 (zero) for the\n\
6469 default packet size. The actual limit is further reduced\n\
6470 dependent on the target. Specify ``fixed'' to disable the\n\
6471 further restriction and ``limit'' to enable that restriction."),
6472 &remote_set_cmdlist
);
6473 add_cmd ("memory-read-packet-size", no_class
,
6474 set_memory_read_packet_size
, _("\
6475 Set the maximum number of bytes per memory-read packet.\n\
6476 Specify the number of bytes in a packet or 0 (zero) for the\n\
6477 default packet size. The actual limit is further reduced\n\
6478 dependent on the target. Specify ``fixed'' to disable the\n\
6479 further restriction and ``limit'' to enable that restriction."),
6480 &remote_set_cmdlist
);
6481 add_cmd ("memory-write-packet-size", no_class
,
6482 show_memory_write_packet_size
,
6483 _("Show the maximum number of bytes per memory-write packet."),
6484 &remote_show_cmdlist
);
6485 add_cmd ("memory-read-packet-size", no_class
,
6486 show_memory_read_packet_size
,
6487 _("Show the maximum number of bytes per memory-read packet."),
6488 &remote_show_cmdlist
);
6490 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
6491 &remote_hw_watchpoint_limit
, _("\
6492 Set the maximum number of target hardware watchpoints."), _("\
6493 Show the maximum number of target hardware watchpoints."), _("\
6494 Specify a negative limit for unlimited."),
6495 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
6496 &remote_set_cmdlist
, &remote_show_cmdlist
);
6497 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
6498 &remote_hw_breakpoint_limit
, _("\
6499 Set the maximum number of target hardware breakpoints."), _("\
6500 Show the maximum number of target hardware breakpoints."), _("\
6501 Specify a negative limit for unlimited."),
6502 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
6503 &remote_set_cmdlist
, &remote_show_cmdlist
);
6505 add_setshow_integer_cmd ("remoteaddresssize", class_obscure
,
6506 &remote_address_size
, _("\
6507 Set the maximum size of the address (in bits) in a memory packet."), _("\
6508 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
6510 NULL
, /* FIXME: i18n: */
6511 &setlist
, &showlist
);
6513 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
6514 "X", "binary-download", 1);
6516 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
6517 "vCont", "verbose-resume", 0);
6519 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
6520 "QPassSignals", "pass-signals", 0);
6522 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
6523 "qSymbol", "symbol-lookup", 0);
6525 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
6526 "P", "set-register", 1);
6528 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
6529 "p", "fetch-register", 1);
6531 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
6532 "Z0", "software-breakpoint", 0);
6534 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
6535 "Z1", "hardware-breakpoint", 0);
6537 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
6538 "Z2", "write-watchpoint", 0);
6540 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
6541 "Z3", "read-watchpoint", 0);
6543 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
6544 "Z4", "access-watchpoint", 0);
6546 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
6547 "qXfer:auxv:read", "read-aux-vector", 0);
6549 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
6550 "qXfer:features:read", "target-features", 0);
6552 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
6553 "qXfer:memory-map:read", "memory-map", 0);
6555 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
6556 "qGetTLSAddr", "get-thread-local-storage-address",
6559 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
6560 "qSupported", "supported-packets", 0);
6562 /* Keep the old ``set remote Z-packet ...'' working. Each individual
6563 Z sub-packet has its own set and show commands, but users may
6564 have sets to this variable in their .gdbinit files (or in their
6566 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
6567 &remote_Z_packet_detect
, _("\
6568 Set use of remote protocol `Z' packets"), _("\
6569 Show use of remote protocol `Z' packets "), _("\
6570 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
6572 set_remote_protocol_Z_packet_cmd
,
6573 show_remote_protocol_Z_packet_cmd
, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
6574 &remote_set_cmdlist
, &remote_show_cmdlist
);
6576 /* Eventually initialize fileio. See fileio.c */
6577 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);