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 (void);
94 static void remote_fetch_registers (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 (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 /* Assume a 1:1 regnum<->pnum table. */
338 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
, NUM_REGS
, struct packet_reg
);
339 for (regnum
= 0; regnum
< NUM_REGS
; regnum
++)
341 struct packet_reg
*r
= &rsa
->regs
[regnum
];
346 /* Define the g/G packet format as the contents of each register
347 with a remote protocol number, in order of ascending protocol
350 remote_regs
= alloca (NUM_REGS
* sizeof (struct packet_reg
*));
351 for (num_remote_regs
= 0, regnum
= 0; regnum
< NUM_REGS
; regnum
++)
352 if (rsa
->regs
[regnum
].pnum
!= -1)
353 remote_regs
[num_remote_regs
++] = &rsa
->regs
[regnum
];
355 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
358 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
360 remote_regs
[regnum
]->in_g_packet
= 1;
361 remote_regs
[regnum
]->offset
= offset
;
362 offset
+= register_size (current_gdbarch
, remote_regs
[regnum
]->regnum
);
365 /* Record the maximum possible size of the g packet - it may turn out
367 rsa
->sizeof_g_packet
= offset
;
369 /* Default maximum number of characters in a packet body. Many
370 remote stubs have a hardwired buffer size of 400 bytes
371 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
372 as the maximum packet-size to ensure that the packet and an extra
373 NUL character can always fit in the buffer. This stops GDB
374 trashing stubs that try to squeeze an extra NUL into what is
375 already a full buffer (As of 1999-12-04 that was most stubs). */
376 rsa
->remote_packet_size
= 400 - 1;
378 /* This one is filled in when a ``g'' packet is received. */
379 rsa
->actual_register_packet_size
= 0;
381 /* Should rsa->sizeof_g_packet needs more space than the
382 default, adjust the size accordingly. Remember that each byte is
383 encoded as two characters. 32 is the overhead for the packet
384 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
385 (``$NN:G...#NN'') is a better guess, the below has been padded a
387 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
388 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
390 /* Make sure that the packet buffer is plenty big enough for
391 this architecture. */
392 if (rs
->buf_size
< rsa
->remote_packet_size
)
394 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
395 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
401 /* Return the current allowed size of a remote packet. This is
402 inferred from the current architecture, and should be used to
403 limit the length of outgoing packets. */
405 get_remote_packet_size (void)
407 struct remote_state
*rs
= get_remote_state ();
408 struct remote_arch_state
*rsa
= get_remote_arch_state ();
410 if (rs
->explicit_packet_size
)
411 return rs
->explicit_packet_size
;
413 return rsa
->remote_packet_size
;
416 static struct packet_reg
*
417 packet_reg_from_regnum (struct remote_arch_state
*rsa
, long regnum
)
419 if (regnum
< 0 && regnum
>= NUM_REGS
)
423 struct packet_reg
*r
= &rsa
->regs
[regnum
];
424 gdb_assert (r
->regnum
== regnum
);
429 static struct packet_reg
*
430 packet_reg_from_pnum (struct remote_arch_state
*rsa
, LONGEST pnum
)
433 for (i
= 0; i
< NUM_REGS
; i
++)
435 struct packet_reg
*r
= &rsa
->regs
[i
];
442 /* FIXME: graces/2002-08-08: These variables should eventually be
443 bound to an instance of the target object (as in gdbarch-tdep()),
444 when such a thing exists. */
446 /* This is set to the data address of the access causing the target
447 to stop for a watchpoint. */
448 static CORE_ADDR remote_watch_data_address
;
450 /* This is non-zero if target stopped for a watchpoint. */
451 static int remote_stopped_by_watchpoint_p
;
453 static struct target_ops remote_ops
;
455 static struct target_ops extended_remote_ops
;
457 /* Temporary target ops. Just like the remote_ops and
458 extended_remote_ops, but with asynchronous support. */
459 static struct target_ops remote_async_ops
;
461 static struct target_ops extended_async_remote_ops
;
463 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
464 ``forever'' still use the normal timeout mechanism. This is
465 currently used by the ASYNC code to guarentee that target reads
466 during the initial connect always time-out. Once getpkt has been
467 modified to return a timeout indication and, in turn
468 remote_wait()/wait_for_inferior() have gained a timeout parameter
470 static int wait_forever_enabled_p
= 1;
473 /* This variable chooses whether to send a ^C or a break when the user
474 requests program interruption. Although ^C is usually what remote
475 systems expect, and that is the default here, sometimes a break is
476 preferable instead. */
478 static int remote_break
;
480 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
481 remote_open knows that we don't have a file open when the program
483 static struct serial
*remote_desc
= NULL
;
485 /* This variable sets the number of bits in an address that are to be
486 sent in a memory ("M" or "m") packet. Normally, after stripping
487 leading zeros, the entire address would be sent. This variable
488 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
489 initial implementation of remote.c restricted the address sent in
490 memory packets to ``host::sizeof long'' bytes - (typically 32
491 bits). Consequently, for 64 bit targets, the upper 32 bits of an
492 address was never sent. Since fixing this bug may cause a break in
493 some remote targets this variable is principly provided to
494 facilitate backward compatibility. */
496 static int remote_address_size
;
498 /* Tempoary to track who currently owns the terminal. See
499 target_async_terminal_* for more details. */
501 static int remote_async_terminal_ours_p
;
504 /* User configurable variables for the number of characters in a
505 memory read/write packet. MIN (rsa->remote_packet_size,
506 rsa->sizeof_g_packet) is the default. Some targets need smaller
507 values (fifo overruns, et.al.) and some users need larger values
508 (speed up transfers). The variables ``preferred_*'' (the user
509 request), ``current_*'' (what was actually set) and ``forced_*''
510 (Positive - a soft limit, negative - a hard limit). */
512 struct memory_packet_config
519 /* Compute the current size of a read/write packet. Since this makes
520 use of ``actual_register_packet_size'' the computation is dynamic. */
523 get_memory_packet_size (struct memory_packet_config
*config
)
525 struct remote_state
*rs
= get_remote_state ();
526 struct remote_arch_state
*rsa
= get_remote_arch_state ();
528 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
529 law?) that some hosts don't cope very well with large alloca()
530 calls. Eventually the alloca() code will be replaced by calls to
531 xmalloc() and make_cleanups() allowing this restriction to either
532 be lifted or removed. */
533 #ifndef MAX_REMOTE_PACKET_SIZE
534 #define MAX_REMOTE_PACKET_SIZE 16384
536 /* NOTE: 20 ensures we can write at least one byte. */
537 #ifndef MIN_REMOTE_PACKET_SIZE
538 #define MIN_REMOTE_PACKET_SIZE 20
543 if (config
->size
<= 0)
544 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
546 what_they_get
= config
->size
;
550 what_they_get
= get_remote_packet_size ();
551 /* Limit the packet to the size specified by the user. */
553 && what_they_get
> config
->size
)
554 what_they_get
= config
->size
;
556 /* Limit it to the size of the targets ``g'' response unless we have
557 permission from the stub to use a larger packet size. */
558 if (rs
->explicit_packet_size
== 0
559 && rsa
->actual_register_packet_size
> 0
560 && what_they_get
> rsa
->actual_register_packet_size
)
561 what_they_get
= rsa
->actual_register_packet_size
;
563 if (what_they_get
> MAX_REMOTE_PACKET_SIZE
)
564 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
565 if (what_they_get
< MIN_REMOTE_PACKET_SIZE
)
566 what_they_get
= MIN_REMOTE_PACKET_SIZE
;
568 /* Make sure there is room in the global buffer for this packet
569 (including its trailing NUL byte). */
570 if (rs
->buf_size
< what_they_get
+ 1)
572 rs
->buf_size
= 2 * what_they_get
;
573 rs
->buf
= xrealloc (rs
->buf
, 2 * what_they_get
);
576 return what_they_get
;
579 /* Update the size of a read/write packet. If they user wants
580 something really big then do a sanity check. */
583 set_memory_packet_size (char *args
, struct memory_packet_config
*config
)
585 int fixed_p
= config
->fixed_p
;
586 long size
= config
->size
;
588 error (_("Argument required (integer, `fixed' or `limited')."));
589 else if (strcmp (args
, "hard") == 0
590 || strcmp (args
, "fixed") == 0)
592 else if (strcmp (args
, "soft") == 0
593 || strcmp (args
, "limit") == 0)
598 size
= strtoul (args
, &end
, 0);
600 error (_("Invalid %s (bad syntax)."), config
->name
);
602 /* Instead of explicitly capping the size of a packet to
603 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
604 instead allowed to set the size to something arbitrarily
606 if (size
> MAX_REMOTE_PACKET_SIZE
)
607 error (_("Invalid %s (too large)."), config
->name
);
611 if (fixed_p
&& !config
->fixed_p
)
613 if (! query (_("The target may not be able to correctly handle a %s\n"
614 "of %ld bytes. Change the packet size? "),
616 error (_("Packet size not changed."));
618 /* Update the config. */
619 config
->fixed_p
= fixed_p
;
624 show_memory_packet_size (struct memory_packet_config
*config
)
626 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
628 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
629 get_memory_packet_size (config
));
631 printf_filtered (_("Packets are limited to %ld bytes.\n"),
632 get_memory_packet_size (config
));
635 static struct memory_packet_config memory_write_packet_config
=
637 "memory-write-packet-size",
641 set_memory_write_packet_size (char *args
, int from_tty
)
643 set_memory_packet_size (args
, &memory_write_packet_config
);
647 show_memory_write_packet_size (char *args
, int from_tty
)
649 show_memory_packet_size (&memory_write_packet_config
);
653 get_memory_write_packet_size (void)
655 return get_memory_packet_size (&memory_write_packet_config
);
658 static struct memory_packet_config memory_read_packet_config
=
660 "memory-read-packet-size",
664 set_memory_read_packet_size (char *args
, int from_tty
)
666 set_memory_packet_size (args
, &memory_read_packet_config
);
670 show_memory_read_packet_size (char *args
, int from_tty
)
672 show_memory_packet_size (&memory_read_packet_config
);
676 get_memory_read_packet_size (void)
678 long size
= get_memory_packet_size (&memory_read_packet_config
);
679 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
680 extra buffer size argument before the memory read size can be
681 increased beyond this. */
682 if (size
> get_remote_packet_size ())
683 size
= get_remote_packet_size ();
688 /* Generic configuration support for packets the stub optionally
689 supports. Allows the user to specify the use of the packet as well
690 as allowing GDB to auto-detect support in the remote stub. */
694 PACKET_SUPPORT_UNKNOWN
= 0,
703 enum auto_boolean detect
;
704 enum packet_support support
;
707 /* Analyze a packet's return value and update the packet config
718 update_packet_config (struct packet_config
*config
)
720 switch (config
->detect
)
722 case AUTO_BOOLEAN_TRUE
:
723 config
->support
= PACKET_ENABLE
;
725 case AUTO_BOOLEAN_FALSE
:
726 config
->support
= PACKET_DISABLE
;
728 case AUTO_BOOLEAN_AUTO
:
729 config
->support
= PACKET_SUPPORT_UNKNOWN
;
735 show_packet_config_cmd (struct packet_config
*config
)
737 char *support
= "internal-error";
738 switch (config
->support
)
744 support
= "disabled";
746 case PACKET_SUPPORT_UNKNOWN
:
750 switch (config
->detect
)
752 case AUTO_BOOLEAN_AUTO
:
753 printf_filtered (_("Support for the `%s' packet is auto-detected, currently %s.\n"),
754 config
->name
, support
);
756 case AUTO_BOOLEAN_TRUE
:
757 case AUTO_BOOLEAN_FALSE
:
758 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
759 config
->name
, support
);
765 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
766 const char *title
, int legacy
)
773 config
->title
= title
;
774 config
->detect
= AUTO_BOOLEAN_AUTO
;
775 config
->support
= PACKET_SUPPORT_UNKNOWN
;
776 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
778 show_doc
= xstrprintf ("Show current use of remote protocol `%s' (%s) packet",
780 /* set/show TITLE-packet {auto,on,off} */
781 cmd_name
= xstrprintf ("%s-packet", title
);
782 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
783 &config
->detect
, set_doc
, show_doc
, NULL
, /* help_doc */
784 set_remote_protocol_packet_cmd
,
785 show_remote_protocol_packet_cmd
,
786 &remote_set_cmdlist
, &remote_show_cmdlist
);
787 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
791 legacy_name
= xstrprintf ("%s-packet", name
);
792 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
793 &remote_set_cmdlist
);
794 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
795 &remote_show_cmdlist
);
799 static enum packet_result
800 packet_check_result (const char *buf
)
804 /* The stub recognized the packet request. Check that the
805 operation succeeded. */
807 && isxdigit (buf
[1]) && isxdigit (buf
[2])
809 /* "Enn" - definitly an error. */
812 /* Always treat "E." as an error. This will be used for
813 more verbose error messages, such as E.memtypes. */
814 if (buf
[0] == 'E' && buf
[1] == '.')
817 /* The packet may or may not be OK. Just assume it is. */
821 /* The stub does not support the packet. */
822 return PACKET_UNKNOWN
;
825 static enum packet_result
826 packet_ok (const char *buf
, struct packet_config
*config
)
828 enum packet_result result
;
830 result
= packet_check_result (buf
);
835 /* The stub recognized the packet request. */
836 switch (config
->support
)
838 case PACKET_SUPPORT_UNKNOWN
:
840 fprintf_unfiltered (gdb_stdlog
,
841 "Packet %s (%s) is supported\n",
842 config
->name
, config
->title
);
843 config
->support
= PACKET_ENABLE
;
846 internal_error (__FILE__
, __LINE__
,
847 _("packet_ok: attempt to use a disabled packet"));
854 /* The stub does not support the packet. */
855 switch (config
->support
)
858 if (config
->detect
== AUTO_BOOLEAN_AUTO
)
859 /* If the stub previously indicated that the packet was
860 supported then there is a protocol error.. */
861 error (_("Protocol error: %s (%s) conflicting enabled responses."),
862 config
->name
, config
->title
);
864 /* The user set it wrong. */
865 error (_("Enabled packet %s (%s) not recognized by stub"),
866 config
->name
, config
->title
);
868 case PACKET_SUPPORT_UNKNOWN
:
870 fprintf_unfiltered (gdb_stdlog
,
871 "Packet %s (%s) is NOT supported\n",
872 config
->name
, config
->title
);
873 config
->support
= PACKET_DISABLE
;
896 PACKET_qXfer_features
,
897 PACKET_qXfer_memory_map
,
904 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
907 set_remote_protocol_packet_cmd (char *args
, int from_tty
,
908 struct cmd_list_element
*c
)
910 struct packet_config
*packet
;
912 for (packet
= remote_protocol_packets
;
913 packet
< &remote_protocol_packets
[PACKET_MAX
];
916 if (&packet
->detect
== c
->var
)
918 update_packet_config (packet
);
922 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
927 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
928 struct cmd_list_element
*c
,
931 struct packet_config
*packet
;
933 for (packet
= remote_protocol_packets
;
934 packet
< &remote_protocol_packets
[PACKET_MAX
];
937 if (&packet
->detect
== c
->var
)
939 show_packet_config_cmd (packet
);
943 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
947 /* Should we try one of the 'Z' requests? */
951 Z_PACKET_SOFTWARE_BP
,
952 Z_PACKET_HARDWARE_BP
,
959 /* For compatibility with older distributions. Provide a ``set remote
960 Z-packet ...'' command that updates all the Z packet types. */
962 static enum auto_boolean remote_Z_packet_detect
;
965 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
966 struct cmd_list_element
*c
)
969 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
971 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
972 update_packet_config (&remote_protocol_packets
[PACKET_Z0
+ i
]);
977 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
978 struct cmd_list_element
*c
,
982 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
984 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
988 /* Should we try the 'ThreadInfo' query packet?
990 This variable (NOT available to the user: auto-detect only!)
991 determines whether GDB will use the new, simpler "ThreadInfo"
992 query or the older, more complex syntax for thread queries.
993 This is an auto-detect variable (set to true at each connect,
994 and set to false when the target fails to recognize it). */
996 static int use_threadinfo_query
;
997 static int use_threadextra_query
;
999 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1000 static struct async_signal_handler
*sigint_remote_twice_token
;
1001 static struct async_signal_handler
*sigint_remote_token
;
1003 /* These are pointers to hook functions that may be set in order to
1004 modify resume/wait behavior for a particular architecture. */
1006 void (*deprecated_target_resume_hook
) (void);
1007 void (*deprecated_target_wait_loop_hook
) (void);
1011 /* These are the threads which we last sent to the remote system.
1012 -1 for all or -2 for not sent yet. */
1013 static int general_thread
;
1014 static int continue_thread
;
1016 /* Call this function as a result of
1017 1) A halt indication (T packet) containing a thread id
1018 2) A direct query of currthread
1019 3) Successful execution of set thread
1023 record_currthread (int currthread
)
1025 general_thread
= currthread
;
1027 /* If this is a new thread, add it to GDB's thread list.
1028 If we leave it up to WFI to do this, bad things will happen. */
1029 if (!in_thread_list (pid_to_ptid (currthread
)))
1031 add_thread (pid_to_ptid (currthread
));
1032 ui_out_text (uiout
, "[New ");
1033 ui_out_text (uiout
, target_pid_to_str (pid_to_ptid (currthread
)));
1034 ui_out_text (uiout
, "]\n");
1038 static char *last_pass_packet
;
1040 /* If 'QPassSignals' is supported, tell the remote stub what signals
1041 it can simply pass through to the inferior without reporting. */
1044 remote_pass_signals (void)
1046 if (remote_protocol_packets
[PACKET_QPassSignals
].support
!= PACKET_DISABLE
)
1048 char *pass_packet
, *p
;
1049 int numsigs
= (int) TARGET_SIGNAL_LAST
;
1052 gdb_assert (numsigs
< 256);
1053 for (i
= 0; i
< numsigs
; i
++)
1055 if (signal_stop_state (i
) == 0
1056 && signal_print_state (i
) == 0
1057 && signal_pass_state (i
) == 1)
1060 pass_packet
= xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
1061 strcpy (pass_packet
, "QPassSignals:");
1062 p
= pass_packet
+ strlen (pass_packet
);
1063 for (i
= 0; i
< numsigs
; i
++)
1065 if (signal_stop_state (i
) == 0
1066 && signal_print_state (i
) == 0
1067 && signal_pass_state (i
) == 1)
1070 *p
++ = tohex (i
>> 4);
1071 *p
++ = tohex (i
& 15);
1080 if (!last_pass_packet
|| strcmp (last_pass_packet
, pass_packet
))
1082 struct remote_state
*rs
= get_remote_state ();
1083 char *buf
= rs
->buf
;
1085 putpkt (pass_packet
);
1086 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1087 packet_ok (buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
1088 if (last_pass_packet
)
1089 xfree (last_pass_packet
);
1090 last_pass_packet
= pass_packet
;
1093 xfree (pass_packet
);
1097 #define MAGIC_NULL_PID 42000
1100 set_thread (int th
, int gen
)
1102 struct remote_state
*rs
= get_remote_state ();
1103 char *buf
= rs
->buf
;
1104 int state
= gen
? general_thread
: continue_thread
;
1110 buf
[1] = gen
? 'g' : 'c';
1111 if (th
== MAGIC_NULL_PID
)
1117 xsnprintf (&buf
[2], get_remote_packet_size () - 2, "-%x", -th
);
1119 xsnprintf (&buf
[2], get_remote_packet_size () - 2, "%x", th
);
1121 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1123 general_thread
= th
;
1125 continue_thread
= th
;
1128 /* Return nonzero if the thread TH is still alive on the remote system. */
1131 remote_thread_alive (ptid_t ptid
)
1133 struct remote_state
*rs
= get_remote_state ();
1134 int tid
= PIDGET (ptid
);
1137 xsnprintf (rs
->buf
, get_remote_packet_size (), "T-%08x", -tid
);
1139 xsnprintf (rs
->buf
, get_remote_packet_size (), "T%08x", tid
);
1141 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1142 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
1145 /* About these extended threadlist and threadinfo packets. They are
1146 variable length packets but, the fields within them are often fixed
1147 length. They are redundent enough to send over UDP as is the
1148 remote protocol in general. There is a matching unit test module
1151 #define OPAQUETHREADBYTES 8
1153 /* a 64 bit opaque identifier */
1154 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
1156 /* WARNING: This threadref data structure comes from the remote O.S.,
1157 libstub protocol encoding, and remote.c. it is not particularly
1160 /* Right now, the internal structure is int. We want it to be bigger.
1164 typedef int gdb_threadref
; /* Internal GDB thread reference. */
1166 /* gdb_ext_thread_info is an internal GDB data structure which is
1167 equivalent to the reply of the remote threadinfo packet. */
1169 struct gdb_ext_thread_info
1171 threadref threadid
; /* External form of thread reference. */
1172 int active
; /* Has state interesting to GDB?
1174 char display
[256]; /* Brief state display, name,
1175 blocked/suspended. */
1176 char shortname
[32]; /* To be used to name threads. */
1177 char more_display
[256]; /* Long info, statistics, queue depth,
1181 /* The volume of remote transfers can be limited by submitting
1182 a mask containing bits specifying the desired information.
1183 Use a union of these values as the 'selection' parameter to
1184 get_thread_info. FIXME: Make these TAG names more thread specific.
1187 #define TAG_THREADID 1
1188 #define TAG_EXISTS 2
1189 #define TAG_DISPLAY 4
1190 #define TAG_THREADNAME 8
1191 #define TAG_MOREDISPLAY 16
1193 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1195 char *unpack_varlen_hex (char *buff
, ULONGEST
*result
);
1197 static char *unpack_nibble (char *buf
, int *val
);
1199 static char *pack_nibble (char *buf
, int nibble
);
1201 static char *pack_hex_byte (char *pkt
, int /* unsigned char */ byte
);
1203 static char *unpack_byte (char *buf
, int *value
);
1205 static char *pack_int (char *buf
, int value
);
1207 static char *unpack_int (char *buf
, int *value
);
1209 static char *unpack_string (char *src
, char *dest
, int length
);
1211 static char *pack_threadid (char *pkt
, threadref
*id
);
1213 static char *unpack_threadid (char *inbuf
, threadref
*id
);
1215 void int_to_threadref (threadref
*id
, int value
);
1217 static int threadref_to_int (threadref
*ref
);
1219 static void copy_threadref (threadref
*dest
, threadref
*src
);
1221 static int threadmatch (threadref
*dest
, threadref
*src
);
1223 static char *pack_threadinfo_request (char *pkt
, int mode
,
1226 static int remote_unpack_thread_info_response (char *pkt
,
1227 threadref
*expectedref
,
1228 struct gdb_ext_thread_info
1232 static int remote_get_threadinfo (threadref
*threadid
,
1233 int fieldset
, /*TAG mask */
1234 struct gdb_ext_thread_info
*info
);
1236 static char *pack_threadlist_request (char *pkt
, int startflag
,
1238 threadref
*nextthread
);
1240 static int parse_threadlist_response (char *pkt
,
1242 threadref
*original_echo
,
1243 threadref
*resultlist
,
1246 static int remote_get_threadlist (int startflag
,
1247 threadref
*nextthread
,
1251 threadref
*threadlist
);
1253 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
1255 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
1256 void *context
, int looplimit
);
1258 static int remote_newthread_step (threadref
*ref
, void *context
);
1260 /* Encode 64 bits in 16 chars of hex. */
1262 static const char hexchars
[] = "0123456789abcdef";
1265 ishex (int ch
, int *val
)
1267 if ((ch
>= 'a') && (ch
<= 'f'))
1269 *val
= ch
- 'a' + 10;
1272 if ((ch
>= 'A') && (ch
<= 'F'))
1274 *val
= ch
- 'A' + 10;
1277 if ((ch
>= '0') && (ch
<= '9'))
1288 if (ch
>= 'a' && ch
<= 'f')
1289 return ch
- 'a' + 10;
1290 if (ch
>= '0' && ch
<= '9')
1292 if (ch
>= 'A' && ch
<= 'F')
1293 return ch
- 'A' + 10;
1298 stub_unpack_int (char *buff
, int fieldlength
)
1305 nibble
= stubhex (*buff
++);
1309 retval
= retval
<< 4;
1315 unpack_varlen_hex (char *buff
, /* packet to parse */
1319 ULONGEST retval
= 0;
1321 while (ishex (*buff
, &nibble
))
1324 retval
= retval
<< 4;
1325 retval
|= nibble
& 0x0f;
1332 unpack_nibble (char *buf
, int *val
)
1334 ishex (*buf
++, val
);
1339 pack_nibble (char *buf
, int nibble
)
1341 *buf
++ = hexchars
[(nibble
& 0x0f)];
1346 pack_hex_byte (char *pkt
, int byte
)
1348 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
1349 *pkt
++ = hexchars
[(byte
& 0xf)];
1354 unpack_byte (char *buf
, int *value
)
1356 *value
= stub_unpack_int (buf
, 2);
1361 pack_int (char *buf
, int value
)
1363 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
1364 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
1365 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
1366 buf
= pack_hex_byte (buf
, (value
& 0xff));
1371 unpack_int (char *buf
, int *value
)
1373 *value
= stub_unpack_int (buf
, 8);
1377 #if 0 /* Currently unused, uncomment when needed. */
1378 static char *pack_string (char *pkt
, char *string
);
1381 pack_string (char *pkt
, char *string
)
1386 len
= strlen (string
);
1388 len
= 200; /* Bigger than most GDB packets, junk??? */
1389 pkt
= pack_hex_byte (pkt
, len
);
1393 if ((ch
== '\0') || (ch
== '#'))
1394 ch
= '*'; /* Protect encapsulation. */
1399 #endif /* 0 (unused) */
1402 unpack_string (char *src
, char *dest
, int length
)
1411 pack_threadid (char *pkt
, threadref
*id
)
1414 unsigned char *altid
;
1416 altid
= (unsigned char *) id
;
1417 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
1419 pkt
= pack_hex_byte (pkt
, *altid
++);
1425 unpack_threadid (char *inbuf
, threadref
*id
)
1428 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
1431 altref
= (char *) id
;
1433 while (inbuf
< limit
)
1435 x
= stubhex (*inbuf
++);
1436 y
= stubhex (*inbuf
++);
1437 *altref
++ = (x
<< 4) | y
;
1442 /* Externally, threadrefs are 64 bits but internally, they are still
1443 ints. This is due to a mismatch of specifications. We would like
1444 to use 64bit thread references internally. This is an adapter
1448 int_to_threadref (threadref
*id
, int value
)
1450 unsigned char *scan
;
1452 scan
= (unsigned char *) id
;
1458 *scan
++ = (value
>> 24) & 0xff;
1459 *scan
++ = (value
>> 16) & 0xff;
1460 *scan
++ = (value
>> 8) & 0xff;
1461 *scan
++ = (value
& 0xff);
1465 threadref_to_int (threadref
*ref
)
1468 unsigned char *scan
;
1474 value
= (value
<< 8) | ((*scan
++) & 0xff);
1479 copy_threadref (threadref
*dest
, threadref
*src
)
1482 unsigned char *csrc
, *cdest
;
1484 csrc
= (unsigned char *) src
;
1485 cdest
= (unsigned char *) dest
;
1492 threadmatch (threadref
*dest
, threadref
*src
)
1494 /* Things are broken right now, so just assume we got a match. */
1496 unsigned char *srcp
, *destp
;
1498 srcp
= (char *) src
;
1499 destp
= (char *) dest
;
1503 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
1510 threadid:1, # always request threadid
1517 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1520 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
1522 *pkt
++ = 'q'; /* Info Query */
1523 *pkt
++ = 'P'; /* process or thread info */
1524 pkt
= pack_int (pkt
, mode
); /* mode */
1525 pkt
= pack_threadid (pkt
, id
); /* threadid */
1526 *pkt
= '\0'; /* terminate */
1530 /* These values tag the fields in a thread info response packet. */
1531 /* Tagging the fields allows us to request specific fields and to
1532 add more fields as time goes by. */
1534 #define TAG_THREADID 1 /* Echo the thread identifier. */
1535 #define TAG_EXISTS 2 /* Is this process defined enough to
1536 fetch registers and its stack? */
1537 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1538 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
1539 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1543 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
1544 struct gdb_ext_thread_info
*info
)
1546 struct remote_state
*rs
= get_remote_state ();
1550 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
1553 /* info->threadid = 0; FIXME: implement zero_threadref. */
1555 info
->display
[0] = '\0';
1556 info
->shortname
[0] = '\0';
1557 info
->more_display
[0] = '\0';
1559 /* Assume the characters indicating the packet type have been
1561 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
1562 pkt
= unpack_threadid (pkt
, &ref
);
1565 warning (_("Incomplete response to threadinfo request."));
1566 if (!threadmatch (&ref
, expectedref
))
1567 { /* This is an answer to a different request. */
1568 warning (_("ERROR RMT Thread info mismatch."));
1571 copy_threadref (&info
->threadid
, &ref
);
1573 /* Loop on tagged fields , try to bail if somthing goes wrong. */
1575 /* Packets are terminated with nulls. */
1576 while ((pkt
< limit
) && mask
&& *pkt
)
1578 pkt
= unpack_int (pkt
, &tag
); /* tag */
1579 pkt
= unpack_byte (pkt
, &length
); /* length */
1580 if (!(tag
& mask
)) /* Tags out of synch with mask. */
1582 warning (_("ERROR RMT: threadinfo tag mismatch."));
1586 if (tag
== TAG_THREADID
)
1590 warning (_("ERROR RMT: length of threadid is not 16."));
1594 pkt
= unpack_threadid (pkt
, &ref
);
1595 mask
= mask
& ~TAG_THREADID
;
1598 if (tag
== TAG_EXISTS
)
1600 info
->active
= stub_unpack_int (pkt
, length
);
1602 mask
= mask
& ~(TAG_EXISTS
);
1605 warning (_("ERROR RMT: 'exists' length too long."));
1611 if (tag
== TAG_THREADNAME
)
1613 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
1614 mask
= mask
& ~TAG_THREADNAME
;
1617 if (tag
== TAG_DISPLAY
)
1619 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
1620 mask
= mask
& ~TAG_DISPLAY
;
1623 if (tag
== TAG_MOREDISPLAY
)
1625 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
1626 mask
= mask
& ~TAG_MOREDISPLAY
;
1629 warning (_("ERROR RMT: unknown thread info tag."));
1630 break; /* Not a tag we know about. */
1636 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
1637 struct gdb_ext_thread_info
*info
)
1639 struct remote_state
*rs
= get_remote_state ();
1642 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
1644 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1645 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
1650 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1653 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
1654 threadref
*nextthread
)
1656 *pkt
++ = 'q'; /* info query packet */
1657 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
1658 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
1659 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
1660 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
1665 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1668 parse_threadlist_response (char *pkt
, int result_limit
,
1669 threadref
*original_echo
, threadref
*resultlist
,
1672 struct remote_state
*rs
= get_remote_state ();
1674 int count
, resultcount
, done
;
1677 /* Assume the 'q' and 'M chars have been stripped. */
1678 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
1679 /* done parse past here */
1680 pkt
= unpack_byte (pkt
, &count
); /* count field */
1681 pkt
= unpack_nibble (pkt
, &done
);
1682 /* The first threadid is the argument threadid. */
1683 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
1684 while ((count
-- > 0) && (pkt
< limit
))
1686 pkt
= unpack_threadid (pkt
, resultlist
++);
1687 if (resultcount
++ >= result_limit
)
1696 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
1697 int *done
, int *result_count
, threadref
*threadlist
)
1699 struct remote_state
*rs
= get_remote_state ();
1700 static threadref echo_nextthread
;
1703 /* Trancate result limit to be smaller than the packet size. */
1704 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10) >= get_remote_packet_size ())
1705 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
1707 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
1709 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1712 parse_threadlist_response (rs
->buf
+ 2, result_limit
, &echo_nextthread
,
1715 if (!threadmatch (&echo_nextthread
, nextthread
))
1717 /* FIXME: This is a good reason to drop the packet. */
1718 /* Possably, there is a duplicate response. */
1720 retransmit immediatly - race conditions
1721 retransmit after timeout - yes
1723 wait for packet, then exit
1725 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
1726 return 0; /* I choose simply exiting. */
1728 if (*result_count
<= 0)
1732 warning (_("RMT ERROR : failed to get remote thread list."));
1735 return result
; /* break; */
1737 if (*result_count
> result_limit
)
1740 warning (_("RMT ERROR: threadlist response longer than requested."));
1746 /* This is the interface between remote and threads, remotes upper
1749 /* remote_find_new_threads retrieves the thread list and for each
1750 thread in the list, looks up the thread in GDB's internal list,
1751 ading the thread if it does not already exist. This involves
1752 getting partial thread lists from the remote target so, polling the
1753 quit_flag is required. */
1756 /* About this many threadisds fit in a packet. */
1758 #define MAXTHREADLISTRESULTS 32
1761 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
1764 int done
, i
, result_count
;
1768 static threadref nextthread
;
1769 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
1774 if (loopcount
++ > looplimit
)
1777 warning (_("Remote fetch threadlist -infinite loop-."));
1780 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
1781 &done
, &result_count
, resultthreadlist
))
1786 /* Clear for later iterations. */
1788 /* Setup to resume next batch of thread references, set nextthread. */
1789 if (result_count
>= 1)
1790 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
1792 while (result_count
--)
1793 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
1800 remote_newthread_step (threadref
*ref
, void *context
)
1804 ptid
= pid_to_ptid (threadref_to_int (ref
));
1806 if (!in_thread_list (ptid
))
1808 return 1; /* continue iterator */
1811 #define CRAZY_MAX_THREADS 1000
1814 remote_current_thread (ptid_t oldpid
)
1816 struct remote_state
*rs
= get_remote_state ();
1819 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1820 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
1821 /* Use strtoul here, so we'll correctly parse values whose highest
1822 bit is set. The protocol carries them as a simple series of
1823 hex digits; in the absence of a sign, strtol will see such
1824 values as positive numbers out of range for signed 'long', and
1825 return LONG_MAX to indicate an overflow. */
1826 return pid_to_ptid (strtoul (&rs
->buf
[2], NULL
, 16));
1831 /* Find new threads for info threads command.
1832 * Original version, using John Metzler's thread protocol.
1836 remote_find_new_threads (void)
1838 remote_threadlist_iterator (remote_newthread_step
, 0,
1840 if (PIDGET (inferior_ptid
) == MAGIC_NULL_PID
) /* ack ack ack */
1841 inferior_ptid
= remote_current_thread (inferior_ptid
);
1845 * Find all threads for info threads command.
1846 * Uses new thread protocol contributed by Cisco.
1847 * Falls back and attempts to use the older method (above)
1848 * if the target doesn't respond to the new method.
1852 remote_threads_info (void)
1854 struct remote_state
*rs
= get_remote_state ();
1858 if (remote_desc
== 0) /* paranoia */
1859 error (_("Command can only be used when connected to the remote target."));
1861 if (use_threadinfo_query
)
1863 putpkt ("qfThreadInfo");
1864 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1866 if (bufp
[0] != '\0') /* q packet recognized */
1868 while (*bufp
++ == 'm') /* reply contains one or more TID */
1872 /* Use strtoul here, so we'll correctly parse values
1873 whose highest bit is set. The protocol carries
1874 them as a simple series of hex digits; in the
1875 absence of a sign, strtol will see such values as
1876 positive numbers out of range for signed 'long',
1877 and return LONG_MAX to indicate an overflow. */
1878 tid
= strtoul (bufp
, &bufp
, 16);
1879 if (tid
!= 0 && !in_thread_list (pid_to_ptid (tid
)))
1880 add_thread (pid_to_ptid (tid
));
1882 while (*bufp
++ == ','); /* comma-separated list */
1883 putpkt ("qsThreadInfo");
1884 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1891 /* Else fall back to old method based on jmetzler protocol. */
1892 use_threadinfo_query
= 0;
1893 remote_find_new_threads ();
1898 * Collect a descriptive string about the given thread.
1899 * The target may say anything it wants to about the thread
1900 * (typically info about its blocked / runnable state, name, etc.).
1901 * This string will appear in the info threads display.
1903 * Optional: targets are not required to implement this function.
1907 remote_threads_extra_info (struct thread_info
*tp
)
1909 struct remote_state
*rs
= get_remote_state ();
1913 struct gdb_ext_thread_info threadinfo
;
1914 static char display_buf
[100]; /* arbitrary... */
1915 int n
= 0; /* position in display_buf */
1917 if (remote_desc
== 0) /* paranoia */
1918 internal_error (__FILE__
, __LINE__
,
1919 _("remote_threads_extra_info"));
1921 if (use_threadextra_query
)
1923 xsnprintf (rs
->buf
, get_remote_packet_size (), "qThreadExtraInfo,%x",
1926 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1927 if (rs
->buf
[0] != 0)
1929 n
= min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
1930 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
1931 display_buf
[result
] = '\0';
1936 /* If the above query fails, fall back to the old method. */
1937 use_threadextra_query
= 0;
1938 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
1939 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
1940 int_to_threadref (&id
, PIDGET (tp
->ptid
));
1941 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
1942 if (threadinfo
.active
)
1944 if (*threadinfo
.shortname
)
1945 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
1946 " Name: %s,", threadinfo
.shortname
);
1947 if (*threadinfo
.display
)
1948 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
1949 " State: %s,", threadinfo
.display
);
1950 if (*threadinfo
.more_display
)
1951 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
1952 " Priority: %s", threadinfo
.more_display
);
1956 /* For purely cosmetic reasons, clear up trailing commas. */
1957 if (',' == display_buf
[n
-1])
1958 display_buf
[n
-1] = ' ';
1966 /* Restart the remote side; this is an extended protocol operation. */
1969 extended_remote_restart (void)
1971 struct remote_state
*rs
= get_remote_state ();
1973 /* Send the restart command; for reasons I don't understand the
1974 remote side really expects a number after the "R". */
1975 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
1978 remote_fileio_reset ();
1980 /* Now query for status so this looks just like we restarted
1981 gdbserver from scratch. */
1983 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1986 /* Clean up connection to a remote debugger. */
1989 remote_close (int quitting
)
1992 serial_close (remote_desc
);
1996 /* Query the remote side for the text, data and bss offsets. */
2001 struct remote_state
*rs
= get_remote_state ();
2005 CORE_ADDR text_addr
, data_addr
, bss_addr
;
2006 struct section_offsets
*offs
;
2008 putpkt ("qOffsets");
2009 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2012 if (buf
[0] == '\000')
2013 return; /* Return silently. Stub doesn't support
2017 warning (_("Remote failure reply: %s"), buf
);
2021 /* Pick up each field in turn. This used to be done with scanf, but
2022 scanf will make trouble if CORE_ADDR size doesn't match
2023 conversion directives correctly. The following code will work
2024 with any size of CORE_ADDR. */
2025 text_addr
= data_addr
= bss_addr
= 0;
2029 if (strncmp (ptr
, "Text=", 5) == 0)
2032 /* Don't use strtol, could lose on big values. */
2033 while (*ptr
&& *ptr
!= ';')
2034 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2039 if (!lose
&& strncmp (ptr
, ";Data=", 6) == 0)
2042 while (*ptr
&& *ptr
!= ';')
2043 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2048 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
2051 while (*ptr
&& *ptr
!= ';')
2052 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
2058 error (_("Malformed response to offset query, %s"), buf
);
2060 if (symfile_objfile
== NULL
)
2063 offs
= ((struct section_offsets
*)
2064 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
2065 memcpy (offs
, symfile_objfile
->section_offsets
,
2066 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
2068 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
2070 /* This is a temporary kludge to force data and bss to use the same offsets
2071 because that's what nlmconv does now. The real solution requires changes
2072 to the stub and remote.c that I don't have time to do right now. */
2074 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
2075 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
2077 objfile_relocate (symfile_objfile
, offs
);
2080 /* Stub for catch_exception. */
2083 remote_start_remote (struct ui_out
*uiout
, void *from_tty_p
)
2085 int from_tty
= * (int *) from_tty_p
;
2087 immediate_quit
++; /* Allow user to interrupt it. */
2089 /* Ack any packet which the remote side has already sent. */
2090 serial_write (remote_desc
, "+", 1);
2092 /* Let the stub know that we want it to return the thread. */
2095 inferior_ptid
= remote_current_thread (inferior_ptid
);
2097 get_offsets (); /* Get text, data & bss offsets. */
2099 putpkt ("?"); /* Initiate a query from remote machine. */
2102 start_remote (from_tty
); /* Initialize gdb process mechanisms. */
2105 /* Open a connection to a remote debugger.
2106 NAME is the filename used for communication. */
2109 remote_open (char *name
, int from_tty
)
2111 remote_open_1 (name
, from_tty
, &remote_ops
, 0, 0);
2114 /* Just like remote_open, but with asynchronous support. */
2116 remote_async_open (char *name
, int from_tty
)
2118 remote_open_1 (name
, from_tty
, &remote_async_ops
, 0, 1);
2121 /* Open a connection to a remote debugger using the extended
2122 remote gdb protocol. NAME is the filename used for communication. */
2125 extended_remote_open (char *name
, int from_tty
)
2127 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */,
2131 /* Just like extended_remote_open, but with asynchronous support. */
2133 extended_remote_async_open (char *name
, int from_tty
)
2135 remote_open_1 (name
, from_tty
, &extended_async_remote_ops
,
2136 1 /*extended_p */, 1 /* async_p */);
2139 /* Generic code for opening a connection to a remote target. */
2142 init_all_packet_configs (void)
2145 for (i
= 0; i
< PACKET_MAX
; i
++)
2146 update_packet_config (&remote_protocol_packets
[i
]);
2149 /* Symbol look-up. */
2152 remote_check_symbols (struct objfile
*objfile
)
2154 struct remote_state
*rs
= get_remote_state ();
2155 char *msg
, *reply
, *tmp
;
2156 struct minimal_symbol
*sym
;
2159 if (remote_protocol_packets
[PACKET_qSymbol
].support
== PACKET_DISABLE
)
2162 /* Allocate a message buffer. We can't reuse the input buffer in RS,
2163 because we need both at the same time. */
2164 msg
= alloca (get_remote_packet_size ());
2166 /* Invite target to request symbol lookups. */
2168 putpkt ("qSymbol::");
2169 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2170 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSymbol
]);
2173 while (strncmp (reply
, "qSymbol:", 8) == 0)
2176 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
2178 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
2180 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
2182 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
2183 paddr_nz (SYMBOL_VALUE_ADDRESS (sym
)),
2186 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2191 static struct serial
*
2192 remote_serial_open (char *name
)
2194 static int udp_warning
= 0;
2196 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2197 of in ser-tcp.c, because it is the remote protocol assuming that the
2198 serial connection is reliable and not the serial connection promising
2200 if (!udp_warning
&& strncmp (name
, "udp:", 4) == 0)
2203 The remote protocol may be unreliable over UDP.\n\
2204 Some events may be lost, rendering further debugging impossible."));
2208 return serial_open (name
);
2211 /* This type describes each known response to the qSupported
2213 struct protocol_feature
2215 /* The name of this protocol feature. */
2218 /* The default for this protocol feature. */
2219 enum packet_support default_support
;
2221 /* The function to call when this feature is reported, or after
2222 qSupported processing if the feature is not supported.
2223 The first argument points to this structure. The second
2224 argument indicates whether the packet requested support be
2225 enabled, disabled, or probed (or the default, if this function
2226 is being called at the end of processing and this feature was
2227 not reported). The third argument may be NULL; if not NULL, it
2228 is a NUL-terminated string taken from the packet following
2229 this feature's name and an equals sign. */
2230 void (*func
) (const struct protocol_feature
*, enum packet_support
,
2233 /* The corresponding packet for this feature. Only used if
2234 FUNC is remote_supported_packet. */
2239 remote_supported_packet (const struct protocol_feature
*feature
,
2240 enum packet_support support
,
2241 const char *argument
)
2245 warning (_("Remote qSupported response supplied an unexpected value for"
2246 " \"%s\"."), feature
->name
);
2250 if (remote_protocol_packets
[feature
->packet
].support
2251 == PACKET_SUPPORT_UNKNOWN
)
2252 remote_protocol_packets
[feature
->packet
].support
= support
;
2256 remote_packet_size (const struct protocol_feature
*feature
,
2257 enum packet_support support
, const char *value
)
2259 struct remote_state
*rs
= get_remote_state ();
2264 if (support
!= PACKET_ENABLE
)
2267 if (value
== NULL
|| *value
== '\0')
2269 warning (_("Remote target reported \"%s\" without a size."),
2275 packet_size
= strtol (value
, &value_end
, 16);
2276 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
2278 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
2279 feature
->name
, value
);
2283 if (packet_size
> MAX_REMOTE_PACKET_SIZE
)
2285 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
2286 packet_size
, MAX_REMOTE_PACKET_SIZE
);
2287 packet_size
= MAX_REMOTE_PACKET_SIZE
;
2290 /* Record the new maximum packet size. */
2291 rs
->explicit_packet_size
= packet_size
;
2294 static struct protocol_feature remote_protocol_features
[] = {
2295 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
2296 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
2297 PACKET_qXfer_auxv
},
2298 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
2299 PACKET_qXfer_features
},
2300 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
2301 PACKET_qXfer_memory_map
},
2302 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
2303 PACKET_QPassSignals
},
2307 remote_query_supported (void)
2309 struct remote_state
*rs
= get_remote_state ();
2312 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
2314 /* The packet support flags are handled differently for this packet
2315 than for most others. We treat an error, a disabled packet, and
2316 an empty response identically: any features which must be reported
2317 to be used will be automatically disabled. An empty buffer
2318 accomplishes this, since that is also the representation for a list
2319 containing no features. */
2322 if (remote_protocol_packets
[PACKET_qSupported
].support
!= PACKET_DISABLE
)
2324 putpkt ("qSupported");
2325 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2327 /* If an error occured, warn, but do not return - just reset the
2328 buffer to empty and go on to disable features. */
2329 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
2332 warning (_("Remote failure reply: %s"), rs
->buf
);
2337 memset (seen
, 0, sizeof (seen
));
2342 enum packet_support is_supported
;
2343 char *p
, *end
, *name_end
, *value
;
2345 /* First separate out this item from the rest of the packet. If
2346 there's another item after this, we overwrite the separator
2347 (terminated strings are much easier to work with). */
2349 end
= strchr (p
, ';');
2352 end
= p
+ strlen (p
);
2362 warning (_("empty item in \"qSupported\" response"));
2367 name_end
= strchr (p
, '=');
2370 /* This is a name=value entry. */
2371 is_supported
= PACKET_ENABLE
;
2372 value
= name_end
+ 1;
2381 is_supported
= PACKET_ENABLE
;
2385 is_supported
= PACKET_DISABLE
;
2389 is_supported
= PACKET_SUPPORT_UNKNOWN
;
2393 warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p
);
2399 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
2400 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
2402 const struct protocol_feature
*feature
;
2405 feature
= &remote_protocol_features
[i
];
2406 feature
->func (feature
, is_supported
, value
);
2411 /* If we increased the packet size, make sure to increase the global
2412 buffer size also. We delay this until after parsing the entire
2413 qSupported packet, because this is the same buffer we were
2415 if (rs
->buf_size
< rs
->explicit_packet_size
)
2417 rs
->buf_size
= rs
->explicit_packet_size
;
2418 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
2421 /* Handle the defaults for unmentioned features. */
2422 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
2425 const struct protocol_feature
*feature
;
2427 feature
= &remote_protocol_features
[i
];
2428 feature
->func (feature
, feature
->default_support
, NULL
);
2434 remote_open_1 (char *name
, int from_tty
, struct target_ops
*target
,
2435 int extended_p
, int async_p
)
2437 struct remote_state
*rs
= get_remote_state ();
2439 error (_("To open a remote debug connection, you need to specify what\n"
2440 "serial device is attached to the remote system\n"
2441 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
2443 /* See FIXME above. */
2445 wait_forever_enabled_p
= 1;
2447 target_preopen (from_tty
);
2449 unpush_target (target
);
2451 /* Make sure we send the passed signals list the next time we resume. */
2452 xfree (last_pass_packet
);
2453 last_pass_packet
= NULL
;
2455 remote_fileio_reset ();
2456 reopen_exec_file ();
2459 remote_desc
= remote_serial_open (name
);
2461 perror_with_name (name
);
2463 if (baud_rate
!= -1)
2465 if (serial_setbaudrate (remote_desc
, baud_rate
))
2467 /* The requested speed could not be set. Error out to
2468 top level after closing remote_desc. Take care to
2469 set remote_desc to NULL to avoid closing remote_desc
2471 serial_close (remote_desc
);
2473 perror_with_name (name
);
2477 serial_raw (remote_desc
);
2479 /* If there is something sitting in the buffer we might take it as a
2480 response to a command, which would be bad. */
2481 serial_flush_input (remote_desc
);
2485 puts_filtered ("Remote debugging using ");
2486 puts_filtered (name
);
2487 puts_filtered ("\n");
2489 push_target (target
); /* Switch to using remote target now. */
2491 /* Reset the target state; these things will be queried either by
2492 remote_query_supported or as they are needed. */
2493 init_all_packet_configs ();
2494 rs
->explicit_packet_size
= 0;
2496 general_thread
= -2;
2497 continue_thread
= -2;
2499 /* Probe for ability to use "ThreadInfo" query, as required. */
2500 use_threadinfo_query
= 1;
2501 use_threadextra_query
= 1;
2503 /* The first packet we send to the target is the optional "supported
2504 packets" request. If the target can answer this, it will tell us
2505 which later probes to skip. */
2506 remote_query_supported ();
2508 /* Next, if the target can specify a description, read it. We do
2509 this before anything involving memory or registers. */
2510 target_find_description ();
2512 /* Without this, some commands which require an active target (such
2513 as kill) won't work. This variable serves (at least) double duty
2514 as both the pid of the target process (if it has such), and as a
2515 flag indicating that a target is active. These functions should
2516 be split out into seperate variables, especially since GDB will
2517 someday have a notion of debugging several processes. */
2519 inferior_ptid
= pid_to_ptid (MAGIC_NULL_PID
);
2523 /* With this target we start out by owning the terminal. */
2524 remote_async_terminal_ours_p
= 1;
2526 /* FIXME: cagney/1999-09-23: During the initial connection it is
2527 assumed that the target is already ready and able to respond to
2528 requests. Unfortunately remote_start_remote() eventually calls
2529 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2530 around this. Eventually a mechanism that allows
2531 wait_for_inferior() to expect/get timeouts will be
2533 wait_forever_enabled_p
= 0;
2536 /* First delete any symbols previously loaded from shared libraries. */
2537 no_shared_libraries (NULL
, 0);
2539 /* Start the remote connection. If error() or QUIT, discard this
2540 target (we'd otherwise be in an inconsistent state) and then
2541 propogate the error on up the exception chain. This ensures that
2542 the caller doesn't stumble along blindly assuming that the
2543 function succeeded. The CLI doesn't have this problem but other
2544 UI's, such as MI do.
2546 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
2547 this function should return an error indication letting the
2548 caller restore the previous state. Unfortunately the command
2549 ``target remote'' is directly wired to this function making that
2550 impossible. On a positive note, the CLI side of this problem has
2551 been fixed - the function set_cmd_context() makes it possible for
2552 all the ``target ....'' commands to share a common callback
2553 function. See cli-dump.c. */
2555 struct gdb_exception ex
2556 = catch_exception (uiout
, remote_start_remote
, &from_tty
,
2562 wait_forever_enabled_p
= 1;
2563 throw_exception (ex
);
2568 wait_forever_enabled_p
= 1;
2572 /* Tell the remote that we are using the extended protocol. */
2574 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2577 if (exec_bfd
) /* No use without an exec file. */
2578 remote_check_symbols (symfile_objfile
);
2581 /* This takes a program previously attached to and detaches it. After
2582 this is done, GDB can be used to debug some other program. We
2583 better not have left any breakpoints in the target program or it'll
2584 die when it hits one. */
2587 remote_detach (char *args
, int from_tty
)
2589 struct remote_state
*rs
= get_remote_state ();
2592 error (_("Argument given to \"detach\" when remotely debugging."));
2594 /* Tell the remote target to detach. */
2595 strcpy (rs
->buf
, "D");
2596 remote_send (&rs
->buf
, &rs
->buf_size
);
2598 /* Unregister the file descriptor from the event loop. */
2599 if (target_is_async_p ())
2600 serial_async (remote_desc
, NULL
, 0);
2602 target_mourn_inferior ();
2604 puts_filtered ("Ending remote debugging.\n");
2607 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
2610 remote_disconnect (struct target_ops
*target
, char *args
, int from_tty
)
2613 error (_("Argument given to \"detach\" when remotely debugging."));
2615 /* Unregister the file descriptor from the event loop. */
2616 if (target_is_async_p ())
2617 serial_async (remote_desc
, NULL
, 0);
2619 target_mourn_inferior ();
2621 puts_filtered ("Ending remote debugging.\n");
2624 /* Convert hex digit A to a number. */
2629 if (a
>= '0' && a
<= '9')
2631 else if (a
>= 'a' && a
<= 'f')
2632 return a
- 'a' + 10;
2633 else if (a
>= 'A' && a
<= 'F')
2634 return a
- 'A' + 10;
2636 error (_("Reply contains invalid hex digit %d"), a
);
2640 hex2bin (const char *hex
, gdb_byte
*bin
, int count
)
2644 for (i
= 0; i
< count
; i
++)
2646 if (hex
[0] == 0 || hex
[1] == 0)
2648 /* Hex string is short, or of uneven length.
2649 Return the count that has been converted so far. */
2652 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
2658 /* Convert number NIB to a hex digit. */
2666 return 'a' + nib
- 10;
2670 bin2hex (const gdb_byte
*bin
, char *hex
, int count
)
2673 /* May use a length, or a nul-terminated string as input. */
2675 count
= strlen ((char *) bin
);
2677 for (i
= 0; i
< count
; i
++)
2679 *hex
++ = tohex ((*bin
>> 4) & 0xf);
2680 *hex
++ = tohex (*bin
++ & 0xf);
2686 /* Check for the availability of vCont. This function should also check
2690 remote_vcont_probe (struct remote_state
*rs
)
2694 strcpy (rs
->buf
, "vCont?");
2696 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2699 /* Make sure that the features we assume are supported. */
2700 if (strncmp (buf
, "vCont", 5) == 0)
2703 int support_s
, support_S
, support_c
, support_C
;
2709 while (p
&& *p
== ';')
2712 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2714 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2716 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2718 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2721 p
= strchr (p
, ';');
2724 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
2725 BUF will make packet_ok disable the packet. */
2726 if (!support_s
|| !support_S
|| !support_c
|| !support_C
)
2730 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
2733 /* Resume the remote inferior by using a "vCont" packet. The thread
2734 to be resumed is PTID; STEP and SIGGNAL indicate whether the
2735 resumed thread should be single-stepped and/or signalled. If PTID's
2736 PID is -1, then all threads are resumed; the thread to be stepped and/or
2737 signalled is given in the global INFERIOR_PTID. This function returns
2738 non-zero iff it resumes the inferior.
2740 This function issues a strict subset of all possible vCont commands at the
2744 remote_vcont_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2746 struct remote_state
*rs
= get_remote_state ();
2747 int pid
= PIDGET (ptid
);
2748 char *buf
= NULL
, *outbuf
;
2749 struct cleanup
*old_cleanup
;
2751 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
2752 remote_vcont_probe (rs
);
2754 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_DISABLE
)
2757 /* If we could generate a wider range of packets, we'd have to worry
2758 about overflowing BUF. Should there be a generic
2759 "multi-part-packet" packet? */
2761 if (PIDGET (inferior_ptid
) == MAGIC_NULL_PID
)
2763 /* MAGIC_NULL_PTID means that we don't have any active threads, so we
2764 don't have any PID numbers the inferior will understand. Make sure
2765 to only send forms that do not specify a PID. */
2766 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2767 outbuf
= xstrprintf ("vCont;S%02x", siggnal
);
2769 outbuf
= xstrprintf ("vCont;s");
2770 else if (siggnal
!= TARGET_SIGNAL_0
)
2771 outbuf
= xstrprintf ("vCont;C%02x", siggnal
);
2773 outbuf
= xstrprintf ("vCont;c");
2777 /* Resume all threads, with preference for INFERIOR_PTID. */
2778 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2779 outbuf
= xstrprintf ("vCont;S%02x:%x;c", siggnal
,
2780 PIDGET (inferior_ptid
));
2782 outbuf
= xstrprintf ("vCont;s:%x;c", PIDGET (inferior_ptid
));
2783 else if (siggnal
!= TARGET_SIGNAL_0
)
2784 outbuf
= xstrprintf ("vCont;C%02x:%x;c", siggnal
,
2785 PIDGET (inferior_ptid
));
2787 outbuf
= xstrprintf ("vCont;c");
2791 /* Scheduler locking; resume only PTID. */
2792 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2793 outbuf
= xstrprintf ("vCont;S%02x:%x", siggnal
, pid
);
2795 outbuf
= xstrprintf ("vCont;s:%x", pid
);
2796 else if (siggnal
!= TARGET_SIGNAL_0
)
2797 outbuf
= xstrprintf ("vCont;C%02x:%x", siggnal
, pid
);
2799 outbuf
= xstrprintf ("vCont;c:%x", pid
);
2802 gdb_assert (outbuf
&& strlen (outbuf
) < get_remote_packet_size ());
2803 old_cleanup
= make_cleanup (xfree
, outbuf
);
2807 do_cleanups (old_cleanup
);
2812 /* Tell the remote machine to resume. */
2814 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
2816 static int last_sent_step
;
2819 remote_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2821 struct remote_state
*rs
= get_remote_state ();
2823 int pid
= PIDGET (ptid
);
2825 last_sent_signal
= siggnal
;
2826 last_sent_step
= step
;
2828 /* A hook for when we need to do something at the last moment before
2830 if (deprecated_target_resume_hook
)
2831 (*deprecated_target_resume_hook
) ();
2833 /* Update the inferior on signals to silently pass, if they've changed. */
2834 remote_pass_signals ();
2836 /* The vCont packet doesn't need to specify threads via Hc. */
2837 if (remote_vcont_resume (ptid
, step
, siggnal
))
2840 /* All other supported resume packets do use Hc, so call set_thread. */
2842 set_thread (0, 0); /* Run any thread. */
2844 set_thread (pid
, 0); /* Run this thread. */
2847 if (siggnal
!= TARGET_SIGNAL_0
)
2849 buf
[0] = step
? 'S' : 'C';
2850 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
2851 buf
[2] = tohex (((int) siggnal
) & 0xf);
2855 strcpy (buf
, step
? "s" : "c");
2860 /* Same as remote_resume, but with async support. */
2862 remote_async_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2864 remote_resume (ptid
, step
, siggnal
);
2866 /* We are about to start executing the inferior, let's register it
2867 with the event loop. NOTE: this is the one place where all the
2868 execution commands end up. We could alternatively do this in each
2869 of the execution commands in infcmd.c. */
2870 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
2871 into infcmd.c in order to allow inferior function calls to work
2872 NOT asynchronously. */
2873 if (target_can_async_p ())
2874 target_async (inferior_event_handler
, 0);
2875 /* Tell the world that the target is now executing. */
2876 /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set
2877 this? Instead, should the client of target just assume (for
2878 async targets) that the target is going to start executing? Is
2879 this information already found in the continuation block? */
2880 if (target_is_async_p ())
2881 target_executing
= 1;
2885 /* Set up the signal handler for SIGINT, while the target is
2886 executing, ovewriting the 'regular' SIGINT signal handler. */
2888 initialize_sigint_signal_handler (void)
2890 sigint_remote_token
=
2891 create_async_signal_handler (async_remote_interrupt
, NULL
);
2892 signal (SIGINT
, handle_remote_sigint
);
2895 /* Signal handler for SIGINT, while the target is executing. */
2897 handle_remote_sigint (int sig
)
2899 signal (sig
, handle_remote_sigint_twice
);
2900 sigint_remote_twice_token
=
2901 create_async_signal_handler (async_remote_interrupt_twice
, NULL
);
2902 mark_async_signal_handler_wrapper (sigint_remote_token
);
2905 /* Signal handler for SIGINT, installed after SIGINT has already been
2906 sent once. It will take effect the second time that the user sends
2909 handle_remote_sigint_twice (int sig
)
2911 signal (sig
, handle_sigint
);
2912 sigint_remote_twice_token
=
2913 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
2914 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
2917 /* Perform the real interruption of the target execution, in response
2920 async_remote_interrupt (gdb_client_data arg
)
2923 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2928 /* Perform interrupt, if the first attempt did not succeed. Just give
2929 up on the target alltogether. */
2931 async_remote_interrupt_twice (gdb_client_data arg
)
2934 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
2935 /* Do something only if the target was not killed by the previous
2937 if (target_executing
)
2940 signal (SIGINT
, handle_remote_sigint
);
2944 /* Reinstall the usual SIGINT handlers, after the target has
2947 cleanup_sigint_signal_handler (void *dummy
)
2949 signal (SIGINT
, handle_sigint
);
2950 if (sigint_remote_twice_token
)
2951 delete_async_signal_handler (&sigint_remote_twice_token
);
2952 if (sigint_remote_token
)
2953 delete_async_signal_handler (&sigint_remote_token
);
2956 /* Send ^C to target to halt it. Target will respond, and send us a
2958 static void (*ofunc
) (int);
2960 /* The command line interface's stop routine. This function is installed
2961 as a signal handler for SIGINT. The first time a user requests a
2962 stop, we call remote_stop to send a break or ^C. If there is no
2963 response from the target (it didn't stop when the user requested it),
2964 we ask the user if he'd like to detach from the target. */
2966 remote_interrupt (int signo
)
2968 /* If this doesn't work, try more severe steps. */
2969 signal (signo
, remote_interrupt_twice
);
2972 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2977 /* The user typed ^C twice. */
2980 remote_interrupt_twice (int signo
)
2982 signal (signo
, ofunc
);
2984 signal (signo
, remote_interrupt
);
2987 /* This is the generic stop called via the target vector. When a target
2988 interrupt is requested, either by the command line or the GUI, we
2989 will eventually end up here. */
2993 /* Send a break or a ^C, depending on user preference. */
2995 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
2998 serial_send_break (remote_desc
);
3000 serial_write (remote_desc
, "\003", 1);
3003 /* Ask the user what to do when an interrupt is received. */
3006 interrupt_query (void)
3008 target_terminal_ours ();
3010 if (query ("Interrupted while waiting for the program.\n\
3011 Give up (and stop debugging it)? "))
3013 target_mourn_inferior ();
3014 deprecated_throw_reason (RETURN_QUIT
);
3017 target_terminal_inferior ();
3020 /* Enable/disable target terminal ownership. Most targets can use
3021 terminal groups to control terminal ownership. Remote targets are
3022 different in that explicit transfer of ownership to/from GDB/target
3026 remote_async_terminal_inferior (void)
3028 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
3029 sync_execution here. This function should only be called when
3030 GDB is resuming the inferior in the forground. A background
3031 resume (``run&'') should leave GDB in control of the terminal and
3032 consequently should not call this code. */
3033 if (!sync_execution
)
3035 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
3036 calls target_terminal_*() idenpotent. The event-loop GDB talking
3037 to an asynchronous target with a synchronous command calls this
3038 function from both event-top.c and infrun.c/infcmd.c. Once GDB
3039 stops trying to transfer the terminal to the target when it
3040 shouldn't this guard can go away. */
3041 if (!remote_async_terminal_ours_p
)
3043 delete_file_handler (input_fd
);
3044 remote_async_terminal_ours_p
= 0;
3045 initialize_sigint_signal_handler ();
3046 /* NOTE: At this point we could also register our selves as the
3047 recipient of all input. Any characters typed could then be
3048 passed on down to the target. */
3052 remote_async_terminal_ours (void)
3054 /* See FIXME in remote_async_terminal_inferior. */
3055 if (!sync_execution
)
3057 /* See FIXME in remote_async_terminal_inferior. */
3058 if (remote_async_terminal_ours_p
)
3060 cleanup_sigint_signal_handler (NULL
);
3061 add_file_handler (input_fd
, stdin_event_handler
, 0);
3062 remote_async_terminal_ours_p
= 1;
3065 /* If nonzero, ignore the next kill. */
3070 remote_console_output (char *msg
)
3074 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
3077 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
3080 fputs_unfiltered (tb
, gdb_stdtarg
);
3082 gdb_flush (gdb_stdtarg
);
3085 /* Wait until the remote machine stops, then return,
3086 storing status in STATUS just as `wait' would.
3087 Returns "pid", which in the case of a multi-threaded
3088 remote OS, is the thread-id. */
3091 remote_wait (ptid_t ptid
, struct target_waitstatus
*status
)
3093 struct remote_state
*rs
= get_remote_state ();
3094 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3095 ULONGEST thread_num
= -1;
3098 status
->kind
= TARGET_WAITKIND_EXITED
;
3099 status
->value
.integer
= 0;
3105 ofunc
= signal (SIGINT
, remote_interrupt
);
3106 getpkt (&rs
->buf
, &rs
->buf_size
, 1);
3107 signal (SIGINT
, ofunc
);
3111 /* This is a hook for when we need to do something (perhaps the
3112 collection of trace data) every time the target stops. */
3113 if (deprecated_target_wait_loop_hook
)
3114 (*deprecated_target_wait_loop_hook
) ();
3116 remote_stopped_by_watchpoint_p
= 0;
3120 case 'E': /* Error of some sort. */
3121 warning (_("Remote failure reply: %s"), buf
);
3123 case 'F': /* File-I/O request. */
3124 remote_fileio_request (buf
);
3126 case 'T': /* Status with PC, SP, FP, ... */
3128 gdb_byte regs
[MAX_REGISTER_SIZE
];
3130 /* Expedited reply, containing Signal, {regno, reg} repeat. */
3131 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3133 n... = register number
3134 r... = register contents
3136 p
= &buf
[3]; /* after Txx */
3145 /* If the packet contains a register number save it in
3146 pnum and set p1 to point to the character following
3147 it. Otherwise p1 points to p. */
3149 /* If this packet is an awatch packet, don't parse the
3150 'a' as a register number. */
3152 if (strncmp (p
, "awatch", strlen("awatch")) != 0)
3154 /* Read the ``P'' register number. */
3155 pnum
= strtol (p
, &p_temp
, 16);
3161 if (p1
== p
) /* No register number present here. */
3163 p1
= strchr (p
, ':');
3165 error (_("Malformed packet(a) (missing colon): %s\n\
3168 if (strncmp (p
, "thread", p1
- p
) == 0)
3170 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
3171 record_currthread (thread_num
);
3174 else if ((strncmp (p
, "watch", p1
- p
) == 0)
3175 || (strncmp (p
, "rwatch", p1
- p
) == 0)
3176 || (strncmp (p
, "awatch", p1
- p
) == 0))
3178 remote_stopped_by_watchpoint_p
= 1;
3179 p
= unpack_varlen_hex (++p1
, &addr
);
3180 remote_watch_data_address
= (CORE_ADDR
)addr
;
3184 /* Silently skip unknown optional info. */
3185 p_temp
= strchr (p1
+ 1, ';');
3192 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
3196 error (_("Malformed packet(b) (missing colon): %s\n\
3201 error (_("Remote sent bad register number %s: %s\n\
3203 phex_nz (pnum
, 0), p
, buf
);
3205 fieldsize
= hex2bin (p
, regs
,
3206 register_size (current_gdbarch
,
3209 if (fieldsize
< register_size (current_gdbarch
,
3211 warning (_("Remote reply is too short: %s"), buf
);
3212 regcache_raw_supply (current_regcache
,
3217 error (_("Remote register badly formatted: %s\nhere: %s"),
3222 case 'S': /* Old style status, just signal only. */
3223 status
->kind
= TARGET_WAITKIND_STOPPED
;
3224 status
->value
.sig
= (enum target_signal
)
3225 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3229 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
3230 record_currthread (thread_num
);
3233 case 'W': /* Target exited. */
3235 /* The remote process exited. */
3236 status
->kind
= TARGET_WAITKIND_EXITED
;
3237 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
3241 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
3242 status
->value
.sig
= (enum target_signal
)
3243 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3247 case 'O': /* Console output. */
3248 remote_console_output (buf
+ 1);
3251 if (last_sent_signal
!= TARGET_SIGNAL_0
)
3253 /* Zero length reply means that we tried 'S' or 'C' and
3254 the remote system doesn't support it. */
3255 target_terminal_ours_for_output ();
3257 ("Can't send signals to this remote system. %s not sent.\n",
3258 target_signal_to_name (last_sent_signal
));
3259 last_sent_signal
= TARGET_SIGNAL_0
;
3260 target_terminal_inferior ();
3262 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
3263 putpkt ((char *) buf
);
3266 /* else fallthrough */
3268 warning (_("Invalid remote reply: %s"), buf
);
3273 if (thread_num
!= -1)
3275 return pid_to_ptid (thread_num
);
3277 return inferior_ptid
;
3280 /* Async version of remote_wait. */
3282 remote_async_wait (ptid_t ptid
, struct target_waitstatus
*status
)
3284 struct remote_state
*rs
= get_remote_state ();
3285 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3286 ULONGEST thread_num
= -1;
3289 status
->kind
= TARGET_WAITKIND_EXITED
;
3290 status
->value
.integer
= 0;
3292 remote_stopped_by_watchpoint_p
= 0;
3298 if (!target_is_async_p ())
3299 ofunc
= signal (SIGINT
, remote_interrupt
);
3300 /* FIXME: cagney/1999-09-27: If we're in async mode we should
3301 _never_ wait for ever -> test on target_is_async_p().
3302 However, before we do that we need to ensure that the caller
3303 knows how to take the target into/out of async mode. */
3304 getpkt (&rs
->buf
, &rs
->buf_size
, wait_forever_enabled_p
);
3305 if (!target_is_async_p ())
3306 signal (SIGINT
, ofunc
);
3310 /* This is a hook for when we need to do something (perhaps the
3311 collection of trace data) every time the target stops. */
3312 if (deprecated_target_wait_loop_hook
)
3313 (*deprecated_target_wait_loop_hook
) ();
3317 case 'E': /* Error of some sort. */
3318 warning (_("Remote failure reply: %s"), buf
);
3320 case 'F': /* File-I/O request. */
3321 remote_fileio_request (buf
);
3323 case 'T': /* Status with PC, SP, FP, ... */
3325 gdb_byte regs
[MAX_REGISTER_SIZE
];
3327 /* Expedited reply, containing Signal, {regno, reg} repeat. */
3328 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3330 n... = register number
3331 r... = register contents
3333 p
= &buf
[3]; /* after Txx */
3342 /* If the packet contains a register number, save it
3343 in pnum and set p1 to point to the character
3344 following it. Otherwise p1 points to p. */
3346 /* If this packet is an awatch packet, don't parse the 'a'
3347 as a register number. */
3349 if (!strncmp (p
, "awatch", strlen ("awatch")) != 0)
3351 /* Read the register number. */
3352 pnum
= strtol (p
, &p_temp
, 16);
3358 if (p1
== p
) /* No register number present here. */
3360 p1
= strchr (p
, ':');
3362 error (_("Malformed packet(a) (missing colon): %s\n\
3365 if (strncmp (p
, "thread", p1
- p
) == 0)
3367 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
3368 record_currthread (thread_num
);
3371 else if ((strncmp (p
, "watch", p1
- p
) == 0)
3372 || (strncmp (p
, "rwatch", p1
- p
) == 0)
3373 || (strncmp (p
, "awatch", p1
- p
) == 0))
3375 remote_stopped_by_watchpoint_p
= 1;
3376 p
= unpack_varlen_hex (++p1
, &addr
);
3377 remote_watch_data_address
= (CORE_ADDR
)addr
;
3381 /* Silently skip unknown optional info. */
3382 p_temp
= strchr (p1
+ 1, ';');
3390 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
3393 error (_("Malformed packet(b) (missing colon): %s\n\
3398 error (_("Remote sent bad register number %ld: %s\n\
3402 fieldsize
= hex2bin (p
, regs
,
3403 register_size (current_gdbarch
,
3406 if (fieldsize
< register_size (current_gdbarch
,
3408 warning (_("Remote reply is too short: %s"), buf
);
3409 regcache_raw_supply (current_regcache
, reg
->regnum
, regs
);
3413 error (_("Remote register badly formatted: %s\nhere: %s"),
3418 case 'S': /* Old style status, just signal only. */
3419 status
->kind
= TARGET_WAITKIND_STOPPED
;
3420 status
->value
.sig
= (enum target_signal
)
3421 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3425 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
3426 record_currthread (thread_num
);
3429 case 'W': /* Target exited. */
3431 /* The remote process exited. */
3432 status
->kind
= TARGET_WAITKIND_EXITED
;
3433 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
3437 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
3438 status
->value
.sig
= (enum target_signal
)
3439 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3443 case 'O': /* Console output. */
3444 remote_console_output (buf
+ 1);
3445 /* Return immediately to the event loop. The event loop will
3446 still be waiting on the inferior afterwards. */
3447 status
->kind
= TARGET_WAITKIND_IGNORE
;
3450 if (last_sent_signal
!= TARGET_SIGNAL_0
)
3452 /* Zero length reply means that we tried 'S' or 'C' and
3453 the remote system doesn't support it. */
3454 target_terminal_ours_for_output ();
3456 ("Can't send signals to this remote system. %s not sent.\n",
3457 target_signal_to_name (last_sent_signal
));
3458 last_sent_signal
= TARGET_SIGNAL_0
;
3459 target_terminal_inferior ();
3461 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
3462 putpkt ((char *) buf
);
3465 /* else fallthrough */
3467 warning (_("Invalid remote reply: %s"), buf
);
3472 if (thread_num
!= -1)
3474 return pid_to_ptid (thread_num
);
3476 return inferior_ptid
;
3479 /* Fetch a single register using a 'p' packet. */
3482 fetch_register_using_p (struct packet_reg
*reg
)
3484 struct remote_state
*rs
= get_remote_state ();
3486 char regp
[MAX_REGISTER_SIZE
];
3489 if (remote_protocol_packets
[PACKET_p
].support
== PACKET_DISABLE
)
3492 if (reg
->pnum
== -1)
3497 p
+= hexnumstr (p
, reg
->pnum
);
3499 remote_send (&rs
->buf
, &rs
->buf_size
);
3503 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
3507 case PACKET_UNKNOWN
:
3510 error (_("Could not fetch register \"%s\""),
3511 gdbarch_register_name (current_gdbarch
, reg
->regnum
));
3514 /* If this register is unfetchable, tell the regcache. */
3517 regcache_raw_supply (current_regcache
, reg
->regnum
, NULL
);
3518 set_register_cached (reg
->regnum
, -1);
3522 /* Otherwise, parse and supply the value. */
3528 error (_("fetch_register_using_p: early buf termination"));
3530 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3533 regcache_raw_supply (current_regcache
, reg
->regnum
, regp
);
3537 /* Fetch the registers included in the target's 'g' packet. */
3540 send_g_packet (void)
3542 struct remote_state
*rs
= get_remote_state ();
3547 sprintf (rs
->buf
, "g");
3548 remote_send (&rs
->buf
, &rs
->buf_size
);
3550 /* We can get out of synch in various cases. If the first character
3551 in the buffer is not a hex character, assume that has happened
3552 and try to fetch another packet to read. */
3553 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
3554 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
3555 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
3556 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
3559 fprintf_unfiltered (gdb_stdlog
,
3560 "Bad register packet; fetching a new packet\n");
3561 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3564 buf_len
= strlen (rs
->buf
);
3566 /* Sanity check the received packet. */
3567 if (buf_len
% 2 != 0)
3568 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
3574 process_g_packet (void)
3576 struct remote_state
*rs
= get_remote_state ();
3577 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3582 buf_len
= strlen (rs
->buf
);
3584 /* Further sanity checks, with knowledge of the architecture. */
3585 if (REGISTER_BYTES_OK_P () && !REGISTER_BYTES_OK (buf_len
/ 2))
3586 error (_("Remote 'g' packet reply is wrong length: %s"), rs
->buf
);
3587 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
3588 error (_("Remote 'g' packet reply is too long: %s"), rs
->buf
);
3590 /* Save the size of the packet sent to us by the target. It is used
3591 as a heuristic when determining the max size of packets that the
3592 target can safely receive. */
3593 if (rsa
->actual_register_packet_size
== 0)
3594 rsa
->actual_register_packet_size
= buf_len
;
3596 /* If this is smaller than we guessed the 'g' packet would be,
3597 update our records. A 'g' reply that doesn't include a register's
3598 value implies either that the register is not available, or that
3599 the 'p' packet must be used. */
3600 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
3602 rsa
->sizeof_g_packet
= buf_len
/ 2;
3604 for (i
= 0; i
< NUM_REGS
; i
++)
3606 if (rsa
->regs
[i
].pnum
== -1)
3609 if (rsa
->regs
[i
].offset
>= rsa
->sizeof_g_packet
)
3610 rsa
->regs
[i
].in_g_packet
= 0;
3612 rsa
->regs
[i
].in_g_packet
= 1;
3616 regs
= alloca (rsa
->sizeof_g_packet
);
3618 /* Unimplemented registers read as all bits zero. */
3619 memset (regs
, 0, rsa
->sizeof_g_packet
);
3621 /* Reply describes registers byte by byte, each byte encoded as two
3622 hex characters. Suck them all up, then supply them to the
3623 register cacheing/storage mechanism. */
3626 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
3628 if (p
[0] == 0 || p
[1] == 0)
3629 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
3630 internal_error (__FILE__
, __LINE__
,
3631 "unexpected end of 'g' packet reply");
3633 if (p
[0] == 'x' && p
[1] == 'x')
3634 regs
[i
] = 0; /* 'x' */
3636 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3642 for (i
= 0; i
< NUM_REGS
; i
++)
3644 struct packet_reg
*r
= &rsa
->regs
[i
];
3647 if (r
->offset
* 2 >= strlen (rs
->buf
))
3648 /* This shouldn't happen - we adjusted in_g_packet above. */
3649 internal_error (__FILE__
, __LINE__
,
3650 "unexpected end of 'g' packet reply");
3651 else if (rs
->buf
[r
->offset
* 2] == 'x')
3653 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
3654 /* The register isn't available, mark it as such (at
3655 the same time setting the value to zero). */
3656 regcache_raw_supply (current_regcache
, r
->regnum
, NULL
);
3657 set_register_cached (i
, -1);
3660 regcache_raw_supply (current_regcache
, r
->regnum
,
3668 fetch_registers_using_g (void)
3671 process_g_packet ();
3675 remote_fetch_registers (int regnum
)
3677 struct remote_state
*rs
= get_remote_state ();
3678 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3681 set_thread (PIDGET (inferior_ptid
), 1);
3685 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
3686 gdb_assert (reg
!= NULL
);
3688 /* If this register might be in the 'g' packet, try that first -
3689 we are likely to read more than one register. If this is the
3690 first 'g' packet, we might be overly optimistic about its
3691 contents, so fall back to 'p'. */
3692 if (reg
->in_g_packet
)
3694 fetch_registers_using_g ();
3695 if (reg
->in_g_packet
)
3699 if (fetch_register_using_p (reg
))
3702 /* This register is not available. */
3703 regcache_raw_supply (current_regcache
, reg
->regnum
, NULL
);
3704 set_register_cached (reg
->regnum
, -1);
3709 fetch_registers_using_g ();
3711 for (i
= 0; i
< NUM_REGS
; i
++)
3712 if (!rsa
->regs
[i
].in_g_packet
)
3713 if (!fetch_register_using_p (&rsa
->regs
[i
]))
3715 /* This register is not available. */
3716 regcache_raw_supply (current_regcache
, i
, NULL
);
3717 set_register_cached (i
, -1);
3721 /* Prepare to store registers. Since we may send them all (using a
3722 'G' request), we have to read out the ones we don't want to change
3726 remote_prepare_to_store (void)
3728 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3730 gdb_byte buf
[MAX_REGISTER_SIZE
];
3732 /* Make sure the entire registers array is valid. */
3733 switch (remote_protocol_packets
[PACKET_P
].support
)
3735 case PACKET_DISABLE
:
3736 case PACKET_SUPPORT_UNKNOWN
:
3737 /* Make sure all the necessary registers are cached. */
3738 for (i
= 0; i
< NUM_REGS
; i
++)
3739 if (rsa
->regs
[i
].in_g_packet
)
3740 regcache_raw_read (current_regcache
, rsa
->regs
[i
].regnum
, buf
);
3747 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
3748 packet was not recognized. */
3751 store_register_using_P (struct packet_reg
*reg
)
3753 struct remote_state
*rs
= get_remote_state ();
3754 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3755 /* Try storing a single register. */
3756 char *buf
= rs
->buf
;
3757 gdb_byte regp
[MAX_REGISTER_SIZE
];
3760 if (remote_protocol_packets
[PACKET_P
].support
== PACKET_DISABLE
)
3763 if (reg
->pnum
== -1)
3766 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
3767 p
= buf
+ strlen (buf
);
3768 regcache_raw_collect (current_regcache
, reg
->regnum
, regp
);
3769 bin2hex (regp
, p
, register_size (current_gdbarch
, reg
->regnum
));
3770 remote_send (&rs
->buf
, &rs
->buf_size
);
3772 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
3777 error (_("Could not write register \"%s\""),
3778 gdbarch_register_name (current_gdbarch
, reg
->regnum
));
3779 case PACKET_UNKNOWN
:
3782 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
3786 /* Store register REGNUM, or all registers if REGNUM == -1, from the
3787 contents of the register cache buffer. FIXME: ignores errors. */
3790 store_registers_using_G (void)
3792 struct remote_state
*rs
= get_remote_state ();
3793 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3797 /* Extract all the registers in the regcache copying them into a
3801 regs
= alloca (rsa
->sizeof_g_packet
);
3802 memset (regs
, 0, rsa
->sizeof_g_packet
);
3803 for (i
= 0; i
< NUM_REGS
; i
++)
3805 struct packet_reg
*r
= &rsa
->regs
[i
];
3807 regcache_raw_collect (current_regcache
, r
->regnum
, regs
+ r
->offset
);
3811 /* Command describes registers byte by byte,
3812 each byte encoded as two hex characters. */
3815 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
3817 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
3818 remote_send (&rs
->buf
, &rs
->buf_size
);
3821 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
3822 of the register cache buffer. FIXME: ignores errors. */
3825 remote_store_registers (int regnum
)
3827 struct remote_state
*rs
= get_remote_state ();
3828 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3831 set_thread (PIDGET (inferior_ptid
), 1);
3835 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
3836 gdb_assert (reg
!= NULL
);
3838 /* Always prefer to store registers using the 'P' packet if
3839 possible; we often change only a small number of registers.
3840 Sometimes we change a larger number; we'd need help from a
3841 higher layer to know to use 'G'. */
3842 if (store_register_using_P (reg
))
3845 /* For now, don't complain if we have no way to write the
3846 register. GDB loses track of unavailable registers too
3847 easily. Some day, this may be an error. We don't have
3848 any way to read the register, either... */
3849 if (!reg
->in_g_packet
)
3852 store_registers_using_G ();
3856 store_registers_using_G ();
3858 for (i
= 0; i
< NUM_REGS
; i
++)
3859 if (!rsa
->regs
[i
].in_g_packet
)
3860 if (!store_register_using_P (&rsa
->regs
[i
]))
3861 /* See above for why we do not issue an error here. */
3866 /* Return the number of hex digits in num. */
3869 hexnumlen (ULONGEST num
)
3873 for (i
= 0; num
!= 0; i
++)
3879 /* Set BUF to the minimum number of hex digits representing NUM. */
3882 hexnumstr (char *buf
, ULONGEST num
)
3884 int len
= hexnumlen (num
);
3885 return hexnumnstr (buf
, num
, len
);
3889 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
3892 hexnumnstr (char *buf
, ULONGEST num
, int width
)
3898 for (i
= width
- 1; i
>= 0; i
--)
3900 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
3907 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
3910 remote_address_masked (CORE_ADDR addr
)
3912 if (remote_address_size
> 0
3913 && remote_address_size
< (sizeof (ULONGEST
) * 8))
3915 /* Only create a mask when that mask can safely be constructed
3916 in a ULONGEST variable. */
3918 mask
= (mask
<< remote_address_size
) - 1;
3924 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
3925 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
3926 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
3927 (which may be more than *OUT_LEN due to escape characters). The
3928 total number of bytes in the output buffer will be at most
3932 remote_escape_output (const gdb_byte
*buffer
, int len
,
3933 gdb_byte
*out_buf
, int *out_len
,
3936 int input_index
, output_index
;
3939 for (input_index
= 0; input_index
< len
; input_index
++)
3941 gdb_byte b
= buffer
[input_index
];
3943 if (b
== '$' || b
== '#' || b
== '}')
3945 /* These must be escaped. */
3946 if (output_index
+ 2 > out_maxlen
)
3948 out_buf
[output_index
++] = '}';
3949 out_buf
[output_index
++] = b
^ 0x20;
3953 if (output_index
+ 1 > out_maxlen
)
3955 out_buf
[output_index
++] = b
;
3959 *out_len
= input_index
;
3960 return output_index
;
3963 /* Convert BUFFER, escaped data LEN bytes long, into binary data
3964 in OUT_BUF. Return the number of bytes written to OUT_BUF.
3965 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
3967 This function reverses remote_escape_output. It allows more
3968 escaped characters than that function does, in particular because
3969 '*' must be escaped to avoid the run-length encoding processing
3970 in reading packets. */
3973 remote_unescape_input (const gdb_byte
*buffer
, int len
,
3974 gdb_byte
*out_buf
, int out_maxlen
)
3976 int input_index
, output_index
;
3981 for (input_index
= 0; input_index
< len
; input_index
++)
3983 gdb_byte b
= buffer
[input_index
];
3985 if (output_index
+ 1 > out_maxlen
)
3987 warning (_("Received too much data from remote target;"
3988 " ignoring overflow."));
3989 return output_index
;
3994 out_buf
[output_index
++] = b
^ 0x20;
4000 out_buf
[output_index
++] = b
;
4004 error (_("Unmatched escape character in target response."));
4006 return output_index
;
4009 /* Determine whether the remote target supports binary downloading.
4010 This is accomplished by sending a no-op memory write of zero length
4011 to the target at the specified address. It does not suffice to send
4012 the whole packet, since many stubs strip the eighth bit and
4013 subsequently compute a wrong checksum, which causes real havoc with
4016 NOTE: This can still lose if the serial line is not eight-bit
4017 clean. In cases like this, the user should clear "remote
4021 check_binary_download (CORE_ADDR addr
)
4023 struct remote_state
*rs
= get_remote_state ();
4025 switch (remote_protocol_packets
[PACKET_X
].support
)
4027 case PACKET_DISABLE
:
4031 case PACKET_SUPPORT_UNKNOWN
:
4037 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4039 p
+= hexnumstr (p
, (ULONGEST
) 0);
4043 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
4044 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4046 if (rs
->buf
[0] == '\0')
4049 fprintf_unfiltered (gdb_stdlog
,
4050 "binary downloading NOT suppported by target\n");
4051 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
4056 fprintf_unfiltered (gdb_stdlog
,
4057 "binary downloading suppported by target\n");
4058 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
4065 /* Write memory data directly to the remote machine.
4066 This does not inform the data cache; the data cache uses this.
4067 HEADER is the starting part of the packet.
4068 MEMADDR is the address in the remote memory space.
4069 MYADDR is the address of the buffer in our space.
4070 LEN is the number of bytes.
4071 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
4072 should send data as binary ('X'), or hex-encoded ('M').
4074 The function creates packet of the form
4075 <HEADER><ADDRESS>,<LENGTH>:<DATA>
4077 where encoding of <DATA> is termined by PACKET_FORMAT.
4079 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
4082 Returns the number of bytes transferred, or 0 (setting errno) for
4083 error. Only transfer a single packet. */
4086 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
4087 const gdb_byte
*myaddr
, int len
,
4088 char packet_format
, int use_length
)
4090 struct remote_state
*rs
= get_remote_state ();
4100 if (packet_format
!= 'X' && packet_format
!= 'M')
4101 internal_error (__FILE__
, __LINE__
,
4102 "remote_write_bytes_aux: bad packet format");
4104 /* Should this be the selected frame? */
4105 gdbarch_remote_translate_xfer_address (current_gdbarch
,
4113 payload_size
= get_memory_write_packet_size ();
4115 /* The packet buffer will be large enough for the payload;
4116 get_memory_packet_size ensures this. */
4119 /* Compute the size of the actual payload by subtracting out the
4120 packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
4122 payload_size
-= strlen ("$,:#NN");
4124 /* The comma won't be used. */
4126 header_length
= strlen (header
);
4127 payload_size
-= header_length
;
4128 payload_size
-= hexnumlen (memaddr
);
4130 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
4132 strcat (rs
->buf
, header
);
4133 p
= rs
->buf
+ strlen (header
);
4135 /* Compute a best guess of the number of bytes actually transfered. */
4136 if (packet_format
== 'X')
4138 /* Best guess at number of bytes that will fit. */
4139 todo
= min (len
, payload_size
);
4141 payload_size
-= hexnumlen (todo
);
4142 todo
= min (todo
, payload_size
);
4146 /* Num bytes that will fit. */
4147 todo
= min (len
, payload_size
/ 2);
4149 payload_size
-= hexnumlen (todo
);
4150 todo
= min (todo
, payload_size
/ 2);
4154 internal_error (__FILE__
, __LINE__
,
4155 _("minumum packet size too small to write data"));
4157 /* If we already need another packet, then try to align the end
4158 of this packet to a useful boundary. */
4159 if (todo
> 2 * REMOTE_ALIGN_WRITES
&& todo
< len
)
4160 todo
= ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
4162 /* Append "<memaddr>". */
4163 memaddr
= remote_address_masked (memaddr
);
4164 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
4171 /* Append <len>. Retain the location/size of <len>. It may need to
4172 be adjusted once the packet body has been created. */
4174 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
4182 /* Append the packet body. */
4183 if (packet_format
== 'X')
4185 /* Binary mode. Send target system values byte by byte, in
4186 increasing byte addresses. Only escape certain critical
4188 payload_length
= remote_escape_output (myaddr
, todo
, p
, &nr_bytes
,
4191 /* If not all TODO bytes fit, then we'll need another packet. Make
4192 a second try to keep the end of the packet aligned. Don't do
4193 this if the packet is tiny. */
4194 if (nr_bytes
< todo
&& nr_bytes
> 2 * REMOTE_ALIGN_WRITES
)
4198 new_nr_bytes
= (((memaddr
+ nr_bytes
) & ~(REMOTE_ALIGN_WRITES
- 1))
4200 if (new_nr_bytes
!= nr_bytes
)
4201 payload_length
= remote_escape_output (myaddr
, new_nr_bytes
,
4206 p
+= payload_length
;
4207 if (use_length
&& nr_bytes
< todo
)
4209 /* Escape chars have filled up the buffer prematurely,
4210 and we have actually sent fewer bytes than planned.
4211 Fix-up the length field of the packet. Use the same
4212 number of characters as before. */
4213 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
4214 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
4219 /* Normal mode: Send target system values byte by byte, in
4220 increasing byte addresses. Each byte is encoded as a two hex
4222 nr_bytes
= bin2hex (myaddr
, p
, todo
);
4226 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
4227 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4229 if (rs
->buf
[0] == 'E')
4231 /* There is no correspondance between what the remote protocol
4232 uses for errors and errno codes. We would like a cleaner way
4233 of representing errors (big enough to include errno codes,
4234 bfd_error codes, and others). But for now just return EIO. */
4239 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
4240 fewer bytes than we'd planned. */
4244 /* Write memory data directly to the remote machine.
4245 This does not inform the data cache; the data cache uses this.
4246 MEMADDR is the address in the remote memory space.
4247 MYADDR is the address of the buffer in our space.
4248 LEN is the number of bytes.
4250 Returns number of bytes transferred, or 0 (setting errno) for
4251 error. Only transfer a single packet. */
4254 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, int len
)
4256 char *packet_format
= 0;
4258 /* Check whether the target supports binary download. */
4259 check_binary_download (memaddr
);
4261 switch (remote_protocol_packets
[PACKET_X
].support
)
4264 packet_format
= "X";
4266 case PACKET_DISABLE
:
4267 packet_format
= "M";
4269 case PACKET_SUPPORT_UNKNOWN
:
4270 internal_error (__FILE__
, __LINE__
,
4271 _("remote_write_bytes: bad internal state"));
4273 internal_error (__FILE__
, __LINE__
, _("bad switch"));
4276 return remote_write_bytes_aux (packet_format
,
4277 memaddr
, myaddr
, len
, packet_format
[0], 1);
4280 /* Read memory data directly from the remote machine.
4281 This does not use the data cache; the data cache uses this.
4282 MEMADDR is the address in the remote memory space.
4283 MYADDR is the address of the buffer in our space.
4284 LEN is the number of bytes.
4286 Returns number of bytes transferred, or 0 for error. */
4288 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
4289 remote targets) shouldn't attempt to read the entire buffer.
4290 Instead it should read a single packet worth of data and then
4291 return the byte size of that packet to the caller. The caller (its
4292 caller and its callers caller ;-) already contains code for
4293 handling partial reads. */
4296 remote_read_bytes (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
4298 struct remote_state
*rs
= get_remote_state ();
4299 int max_buf_size
; /* Max size of packet output buffer. */
4302 /* Should this be the selected frame? */
4303 gdbarch_remote_translate_xfer_address (current_gdbarch
,
4311 max_buf_size
= get_memory_read_packet_size ();
4312 /* The packet buffer will be large enough for the payload;
4313 get_memory_packet_size ensures this. */
4322 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
4324 /* construct "m"<memaddr>","<len>" */
4325 /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */
4326 memaddr
= remote_address_masked (memaddr
);
4329 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
4331 p
+= hexnumstr (p
, (ULONGEST
) todo
);
4335 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4337 if (rs
->buf
[0] == 'E'
4338 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
4339 && rs
->buf
[3] == '\0')
4341 /* There is no correspondance between what the remote
4342 protocol uses for errors and errno codes. We would like
4343 a cleaner way of representing errors (big enough to
4344 include errno codes, bfd_error codes, and others). But
4345 for now just return EIO. */
4350 /* Reply describes memory byte by byte,
4351 each byte encoded as two hex characters. */
4354 if ((i
= hex2bin (p
, myaddr
, todo
)) < todo
)
4356 /* Reply is short. This means that we were able to read
4357 only part of what we wanted to. */
4358 return i
+ (origlen
- len
);
4367 /* Read or write LEN bytes from inferior memory at MEMADDR,
4368 transferring to or from debugger address BUFFER. Write to inferior
4369 if SHOULD_WRITE is nonzero. Returns length of data written or
4370 read; 0 for error. TARGET is unused. */
4373 remote_xfer_memory (CORE_ADDR mem_addr
, gdb_byte
*buffer
, int mem_len
,
4374 int should_write
, struct mem_attrib
*attrib
,
4375 struct target_ops
*target
)
4380 res
= remote_write_bytes (mem_addr
, buffer
, mem_len
);
4382 res
= remote_read_bytes (mem_addr
, buffer
, mem_len
);
4387 /* Sends a packet with content determined by the printf format string
4388 FORMAT and the remaining arguments, then gets the reply. Returns
4389 whether the packet was a success, a failure, or unknown. */
4392 remote_send_printf (const char *format
, ...)
4394 struct remote_state
*rs
= get_remote_state ();
4395 int max_size
= get_remote_packet_size ();
4398 va_start (ap
, format
);
4401 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
4402 internal_error (__FILE__
, __LINE__
, "Too long remote packet.");
4404 if (putpkt (rs
->buf
) < 0)
4405 error (_("Communication problem with target."));
4408 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4410 return packet_check_result (rs
->buf
);
4414 restore_remote_timeout (void *p
)
4416 int value
= *(int *)p
;
4417 remote_timeout
= value
;
4420 /* Flash writing can take quite some time. We'll set
4421 effectively infinite timeout for flash operations.
4422 In future, we'll need to decide on a better approach. */
4423 static const int remote_flash_timeout
= 1000;
4426 remote_flash_erase (struct target_ops
*ops
,
4427 ULONGEST address
, LONGEST length
)
4429 int saved_remote_timeout
= remote_timeout
;
4430 enum packet_result ret
;
4432 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
4433 &saved_remote_timeout
);
4434 remote_timeout
= remote_flash_timeout
;
4436 ret
= remote_send_printf ("vFlashErase:%s,%s",
4441 case PACKET_UNKNOWN
:
4442 error (_("Remote target does not support flash erase"));
4444 error (_("Error erasing flash with vFlashErase packet"));
4449 do_cleanups (back_to
);
4453 remote_flash_write (struct target_ops
*ops
,
4454 ULONGEST address
, LONGEST length
,
4455 const gdb_byte
*data
)
4457 int saved_remote_timeout
= remote_timeout
;
4459 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
4460 &saved_remote_timeout
);
4462 remote_timeout
= remote_flash_timeout
;
4463 ret
= remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 'X', 0);
4464 do_cleanups (back_to
);
4470 remote_flash_done (struct target_ops
*ops
)
4472 int saved_remote_timeout
= remote_timeout
;
4474 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
4475 &saved_remote_timeout
);
4477 remote_timeout
= remote_flash_timeout
;
4478 ret
= remote_send_printf ("vFlashDone");
4479 do_cleanups (back_to
);
4483 case PACKET_UNKNOWN
:
4484 error (_("Remote target does not support vFlashDone"));
4486 error (_("Error finishing flash operation"));
4493 remote_files_info (struct target_ops
*ignore
)
4495 puts_filtered ("Debugging a target over a serial line.\n");
4498 /* Stuff for dealing with the packets which are part of this protocol.
4499 See comment at top of file for details. */
4501 /* Read a single character from the remote end. */
4504 readchar (int timeout
)
4508 ch
= serial_readchar (remote_desc
, timeout
);
4513 switch ((enum serial_rc
) ch
)
4516 target_mourn_inferior ();
4517 error (_("Remote connection closed"));
4520 perror_with_name (_("Remote communication error"));
4522 case SERIAL_TIMEOUT
:
4528 /* Send the command in *BUF to the remote machine, and read the reply
4529 into *BUF. Report an error if we get an error reply. Resize
4530 *BUF using xrealloc if necessary to hold the result, and update
4534 remote_send (char **buf
,
4538 getpkt (buf
, sizeof_buf
, 0);
4540 if ((*buf
)[0] == 'E')
4541 error (_("Remote failure reply: %s"), *buf
);
4544 /* Display a null-terminated packet on stdout, for debugging, using C
4548 print_packet (char *buf
)
4550 puts_filtered ("\"");
4551 fputstr_filtered (buf
, '"', gdb_stdout
);
4552 puts_filtered ("\"");
4558 return putpkt_binary (buf
, strlen (buf
));
4561 /* Send a packet to the remote machine, with error checking. The data
4562 of the packet is in BUF. The string in BUF can be at most
4563 get_remote_packet_size () - 5 to account for the $, # and checksum,
4564 and for a possible /0 if we are debugging (remote_debug) and want
4565 to print the sent packet as a string. */
4568 putpkt_binary (char *buf
, int cnt
)
4571 unsigned char csum
= 0;
4572 char *buf2
= alloca (cnt
+ 6);
4578 /* Copy the packet into buffer BUF2, encapsulating it
4579 and giving it a checksum. */
4584 for (i
= 0; i
< cnt
; i
++)
4590 *p
++ = tohex ((csum
>> 4) & 0xf);
4591 *p
++ = tohex (csum
& 0xf);
4593 /* Send it over and over until we get a positive ack. */
4597 int started_error_output
= 0;
4602 fprintf_unfiltered (gdb_stdlog
, "Sending packet: ");
4603 fputstrn_unfiltered (buf2
, p
- buf2
, 0, gdb_stdlog
);
4604 fprintf_unfiltered (gdb_stdlog
, "...");
4605 gdb_flush (gdb_stdlog
);
4607 if (serial_write (remote_desc
, buf2
, p
- buf2
))
4608 perror_with_name (_("putpkt: write failed"));
4610 /* Read until either a timeout occurs (-2) or '+' is read. */
4613 ch
= readchar (remote_timeout
);
4621 case SERIAL_TIMEOUT
:
4623 if (started_error_output
)
4625 putchar_unfiltered ('\n');
4626 started_error_output
= 0;
4635 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
4639 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
4640 case SERIAL_TIMEOUT
:
4644 break; /* Retransmit buffer. */
4648 fprintf_unfiltered (gdb_stdlog
,
4649 "Packet instead of Ack, ignoring it\n");
4650 /* It's probably an old response sent because an ACK
4651 was lost. Gobble up the packet and ack it so it
4652 doesn't get retransmitted when we resend this
4655 serial_write (remote_desc
, "+", 1);
4656 continue; /* Now, go look for +. */
4661 if (!started_error_output
)
4663 started_error_output
= 1;
4664 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
4666 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
4670 break; /* Here to retransmit. */
4674 /* This is wrong. If doing a long backtrace, the user should be
4675 able to get out next time we call QUIT, without anything as
4676 violent as interrupt_query. If we want to provide a way out of
4677 here without getting to the next QUIT, it should be based on
4678 hitting ^C twice as in remote_wait. */
4688 /* Come here after finding the start of a frame when we expected an
4689 ack. Do our best to discard the rest of this packet. */
4698 c
= readchar (remote_timeout
);
4701 case SERIAL_TIMEOUT
:
4702 /* Nothing we can do. */
4705 /* Discard the two bytes of checksum and stop. */
4706 c
= readchar (remote_timeout
);
4708 c
= readchar (remote_timeout
);
4711 case '*': /* Run length encoding. */
4712 /* Discard the repeat count. */
4713 c
= readchar (remote_timeout
);
4718 /* A regular character. */
4724 /* Come here after finding the start of the frame. Collect the rest
4725 into *BUF, verifying the checksum, length, and handling run-length
4726 compression. NUL terminate the buffer. If there is not enough room,
4727 expand *BUF using xrealloc.
4729 Returns -1 on error, number of characters in buffer (ignoring the
4730 trailing NULL) on success. (could be extended to return one of the
4731 SERIAL status indications). */
4734 read_frame (char **buf_p
,
4747 c
= readchar (remote_timeout
);
4750 case SERIAL_TIMEOUT
:
4752 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
4756 fputs_filtered ("Saw new packet start in middle of old one\n",
4758 return -1; /* Start a new packet, count retries. */
4761 unsigned char pktcsum
;
4767 check_0
= readchar (remote_timeout
);
4769 check_1
= readchar (remote_timeout
);
4771 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
4774 fputs_filtered ("Timeout in checksum, retrying\n",
4778 else if (check_0
< 0 || check_1
< 0)
4781 fputs_filtered ("Communication error in checksum\n",
4786 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
4787 if (csum
== pktcsum
)
4792 fprintf_filtered (gdb_stdlog
,
4793 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
4795 fputstrn_filtered (buf
, bc
, 0, gdb_stdlog
);
4796 fputs_filtered ("\n", gdb_stdlog
);
4798 /* Number of characters in buffer ignoring trailing
4802 case '*': /* Run length encoding. */
4807 c
= readchar (remote_timeout
);
4809 repeat
= c
- ' ' + 3; /* Compute repeat count. */
4811 /* The character before ``*'' is repeated. */
4813 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
4815 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
4817 /* Make some more room in the buffer. */
4818 *sizeof_buf
+= repeat
;
4819 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
4823 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
4829 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
4833 if (bc
>= *sizeof_buf
- 1)
4835 /* Make some more room in the buffer. */
4837 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
4848 /* Read a packet from the remote machine, with error checking, and
4849 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
4850 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
4851 rather than timing out; this is used (in synchronous mode) to wait
4852 for a target that is is executing user code to stop. */
4853 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
4854 don't have to change all the calls to getpkt to deal with the
4855 return value, because at the moment I don't know what the right
4856 thing to do it for those. */
4864 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
4868 /* Read a packet from the remote machine, with error checking, and
4869 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
4870 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
4871 rather than timing out; this is used (in synchronous mode) to wait
4872 for a target that is is executing user code to stop. If FOREVER ==
4873 0, this function is allowed to time out gracefully and return an
4874 indication of this to the caller. Otherwise return the number
4877 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
4884 strcpy (*buf
, "timeout");
4888 timeout
= watchdog
> 0 ? watchdog
: -1;
4892 timeout
= remote_timeout
;
4896 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
4898 /* This can loop forever if the remote side sends us characters
4899 continuously, but if it pauses, we'll get a zero from
4900 readchar because of timeout. Then we'll count that as a
4903 /* Note that we will only wait forever prior to the start of a
4904 packet. After that, we expect characters to arrive at a
4905 brisk pace. They should show up within remote_timeout
4910 c
= readchar (timeout
);
4912 if (c
== SERIAL_TIMEOUT
)
4914 if (forever
) /* Watchdog went off? Kill the target. */
4917 target_mourn_inferior ();
4918 error (_("Watchdog has expired. Target detached."));
4921 fputs_filtered ("Timed out.\n", gdb_stdlog
);
4927 /* We've found the start of a packet, now collect the data. */
4929 val
= read_frame (buf
, sizeof_buf
);
4935 fprintf_unfiltered (gdb_stdlog
, "Packet received: ");
4936 fputstrn_unfiltered (*buf
, val
, 0, gdb_stdlog
);
4937 fprintf_unfiltered (gdb_stdlog
, "\n");
4939 serial_write (remote_desc
, "+", 1);
4943 /* Try the whole thing again. */
4945 serial_write (remote_desc
, "-", 1);
4948 /* We have tried hard enough, and just can't receive the packet.
4951 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
4952 serial_write (remote_desc
, "+", 1);
4959 /* For some mysterious reason, wait_for_inferior calls kill instead of
4960 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4964 target_mourn_inferior ();
4968 /* Use catch_errors so the user can quit from gdb even when we aren't on
4969 speaking terms with the remote system. */
4970 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4972 /* Don't wait for it to die. I'm not really sure it matters whether
4973 we do or not. For the existing stubs, kill is a noop. */
4974 target_mourn_inferior ();
4977 /* Async version of remote_kill. */
4979 remote_async_kill (void)
4981 /* Unregister the file descriptor from the event loop. */
4982 if (target_is_async_p ())
4983 serial_async (remote_desc
, NULL
, 0);
4985 /* For some mysterious reason, wait_for_inferior calls kill instead of
4986 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4990 target_mourn_inferior ();
4994 /* Use catch_errors so the user can quit from gdb even when we
4995 aren't on speaking terms with the remote system. */
4996 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4998 /* Don't wait for it to die. I'm not really sure it matters whether
4999 we do or not. For the existing stubs, kill is a noop. */
5000 target_mourn_inferior ();
5006 remote_mourn_1 (&remote_ops
);
5010 remote_async_mourn (void)
5012 remote_mourn_1 (&remote_async_ops
);
5016 extended_remote_mourn (void)
5018 /* We do _not_ want to mourn the target like this; this will
5019 remove the extended remote target from the target stack,
5020 and the next time the user says "run" it'll fail.
5022 FIXME: What is the right thing to do here? */
5024 remote_mourn_1 (&extended_remote_ops
);
5028 /* Worker function for remote_mourn. */
5030 remote_mourn_1 (struct target_ops
*target
)
5032 unpush_target (target
);
5033 generic_mourn_inferior ();
5036 /* In the extended protocol we want to be able to do things like
5037 "run" and have them basically work as expected. So we need
5038 a special create_inferior function.
5040 FIXME: One day add support for changing the exec file
5041 we're debugging, arguments and an environment. */
5044 extended_remote_create_inferior (char *exec_file
, char *args
,
5045 char **env
, int from_tty
)
5047 /* Rip out the breakpoints; we'll reinsert them after restarting
5048 the remote server. */
5049 remove_breakpoints ();
5051 /* Now restart the remote server. */
5052 extended_remote_restart ();
5054 /* NOTE: We don't need to recheck for a target description here; but
5055 if we gain the ability to switch the remote executable we may
5056 need to, if for instance we are running a process which requested
5057 different emulated hardware from the operating system. A
5058 concrete example of this is ARM GNU/Linux, where some binaries
5059 will have a legacy FPA coprocessor emulated and others may have
5060 access to a hardware VFP unit. */
5062 /* Now put the breakpoints back in. This way we're safe if the
5063 restart function works via a unix fork on the remote side. */
5064 insert_breakpoints ();
5066 /* Clean up from the last time we were running. */
5067 clear_proceed_status ();
5070 /* Async version of extended_remote_create_inferior. */
5072 extended_remote_async_create_inferior (char *exec_file
, char *args
,
5073 char **env
, int from_tty
)
5075 /* Rip out the breakpoints; we'll reinsert them after restarting
5076 the remote server. */
5077 remove_breakpoints ();
5079 /* If running asynchronously, register the target file descriptor
5080 with the event loop. */
5081 if (target_can_async_p ())
5082 target_async (inferior_event_handler
, 0);
5084 /* Now restart the remote server. */
5085 extended_remote_restart ();
5087 /* NOTE: We don't need to recheck for a target description here; but
5088 if we gain the ability to switch the remote executable we may
5089 need to, if for instance we are running a process which requested
5090 different emulated hardware from the operating system. A
5091 concrete example of this is ARM GNU/Linux, where some binaries
5092 will have a legacy FPA coprocessor emulated and others may have
5093 access to a hardware VFP unit. */
5095 /* Now put the breakpoints back in. This way we're safe if the
5096 restart function works via a unix fork on the remote side. */
5097 insert_breakpoints ();
5099 /* Clean up from the last time we were running. */
5100 clear_proceed_status ();
5104 /* On some machines, e.g. 68k, we may use a different breakpoint
5105 instruction than other targets; in those use
5106 DEPRECATED_REMOTE_BREAKPOINT instead of just BREAKPOINT_FROM_PC.
5107 Also, bi-endian targets may define
5108 DEPRECATED_LITTLE_REMOTE_BREAKPOINT and
5109 DEPRECATED_BIG_REMOTE_BREAKPOINT. If none of these are defined, we
5110 just call the standard routines that are in mem-break.c. */
5112 /* NOTE: cagney/2003-06-08: This is silly. A remote and simulator
5113 target should use an identical BREAKPOINT_FROM_PC. As for native,
5114 the ARCH-OS-tdep.c code can override the default. */
5116 #if defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && defined (DEPRECATED_BIG_REMOTE_BREAKPOINT) && !defined(DEPRECATED_REMOTE_BREAKPOINT)
5117 #define DEPRECATED_REMOTE_BREAKPOINT
5120 #ifdef DEPRECATED_REMOTE_BREAKPOINT
5122 /* If the target isn't bi-endian, just pretend it is. */
5123 #if !defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && !defined (DEPRECATED_BIG_REMOTE_BREAKPOINT)
5124 #define DEPRECATED_LITTLE_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
5125 #define DEPRECATED_BIG_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
5128 static unsigned char big_break_insn
[] = DEPRECATED_BIG_REMOTE_BREAKPOINT
;
5129 static unsigned char little_break_insn
[] = DEPRECATED_LITTLE_REMOTE_BREAKPOINT
;
5131 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
5133 /* Insert a breakpoint. On targets that have software breakpoint
5134 support, we ask the remote target to do the work; on targets
5135 which don't, we insert a traditional memory breakpoint. */
5138 remote_insert_breakpoint (struct bp_target_info
*bp_tgt
)
5140 CORE_ADDR addr
= bp_tgt
->placed_address
;
5141 struct remote_state
*rs
= get_remote_state ();
5142 #ifdef DEPRECATED_REMOTE_BREAKPOINT
5146 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
5147 If it succeeds, then set the support to PACKET_ENABLE. If it
5148 fails, and the user has explicitly requested the Z support then
5149 report an error, otherwise, mark it disabled and go on. */
5151 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
5158 BREAKPOINT_FROM_PC (&bp_tgt
->placed_address
, &bp_tgt
->placed_size
);
5159 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
5160 p
+= hexnumstr (p
, addr
);
5161 sprintf (p
, ",%d", bp_tgt
->placed_size
);
5164 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5166 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
5172 case PACKET_UNKNOWN
:
5177 #ifdef DEPRECATED_REMOTE_BREAKPOINT
5178 bp_tgt
->placed_size
= bp_tgt
->shadow_len
= sizeof big_break_insn
;
5179 val
= target_read_memory (addr
, bp_tgt
->shadow_contents
, bp_tgt
->shadow_len
);
5183 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
5184 val
= target_write_memory (addr
, (char *) big_break_insn
,
5185 sizeof big_break_insn
);
5187 val
= target_write_memory (addr
, (char *) little_break_insn
,
5188 sizeof little_break_insn
);
5193 return memory_insert_breakpoint (bp_tgt
);
5194 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
5198 remote_remove_breakpoint (struct bp_target_info
*bp_tgt
)
5200 CORE_ADDR addr
= bp_tgt
->placed_address
;
5201 struct remote_state
*rs
= get_remote_state ();
5204 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
5212 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
5213 p
+= hexnumstr (p
, addr
);
5214 sprintf (p
, ",%d", bp_tgt
->placed_size
);
5217 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5219 return (rs
->buf
[0] == 'E');
5222 #ifdef DEPRECATED_REMOTE_BREAKPOINT
5223 return target_write_memory (bp_tgt
->placed_address
, bp_tgt
->shadow_contents
,
5224 bp_tgt
->shadow_len
);
5226 return memory_remove_breakpoint (bp_tgt
);
5227 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
5231 watchpoint_to_Z_packet (int type
)
5236 return Z_PACKET_WRITE_WP
;
5239 return Z_PACKET_READ_WP
;
5242 return Z_PACKET_ACCESS_WP
;
5245 internal_error (__FILE__
, __LINE__
,
5246 _("hw_bp_to_z: bad watchpoint type %d"), type
);
5251 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
5253 struct remote_state
*rs
= get_remote_state ();
5255 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
5257 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
5260 sprintf (rs
->buf
, "Z%x,", packet
);
5261 p
= strchr (rs
->buf
, '\0');
5262 addr
= remote_address_masked (addr
);
5263 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5264 sprintf (p
, ",%x", len
);
5267 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5269 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
5272 case PACKET_UNKNOWN
:
5277 internal_error (__FILE__
, __LINE__
,
5278 _("remote_insert_watchpoint: reached end of function"));
5283 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
5285 struct remote_state
*rs
= get_remote_state ();
5287 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
5289 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
5292 sprintf (rs
->buf
, "z%x,", packet
);
5293 p
= strchr (rs
->buf
, '\0');
5294 addr
= remote_address_masked (addr
);
5295 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5296 sprintf (p
, ",%x", len
);
5298 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5300 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
5303 case PACKET_UNKNOWN
:
5308 internal_error (__FILE__
, __LINE__
,
5309 _("remote_remove_watchpoint: reached end of function"));
5313 int remote_hw_watchpoint_limit
= -1;
5314 int remote_hw_breakpoint_limit
= -1;
5317 remote_check_watch_resources (int type
, int cnt
, int ot
)
5319 if (type
== bp_hardware_breakpoint
)
5321 if (remote_hw_breakpoint_limit
== 0)
5323 else if (remote_hw_breakpoint_limit
< 0)
5325 else if (cnt
<= remote_hw_breakpoint_limit
)
5330 if (remote_hw_watchpoint_limit
== 0)
5332 else if (remote_hw_watchpoint_limit
< 0)
5336 else if (cnt
<= remote_hw_watchpoint_limit
)
5343 remote_stopped_by_watchpoint (void)
5345 return remote_stopped_by_watchpoint_p
;
5348 extern int stepped_after_stopped_by_watchpoint
;
5351 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
5354 if (remote_stopped_by_watchpoint ()
5355 || stepped_after_stopped_by_watchpoint
)
5357 *addr_p
= remote_watch_data_address
;
5366 remote_insert_hw_breakpoint (struct bp_target_info
*bp_tgt
)
5369 struct remote_state
*rs
= get_remote_state ();
5372 /* The length field should be set to the size of a breakpoint
5373 instruction, even though we aren't inserting one ourselves. */
5375 BREAKPOINT_FROM_PC (&bp_tgt
->placed_address
, &bp_tgt
->placed_size
);
5377 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
5384 addr
= remote_address_masked (bp_tgt
->placed_address
);
5385 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5386 sprintf (p
, ",%x", bp_tgt
->placed_size
);
5389 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5391 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
5394 case PACKET_UNKNOWN
:
5399 internal_error (__FILE__
, __LINE__
,
5400 _("remote_insert_hw_breakpoint: reached end of function"));
5405 remote_remove_hw_breakpoint (struct bp_target_info
*bp_tgt
)
5408 struct remote_state
*rs
= get_remote_state ();
5411 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
5418 addr
= remote_address_masked (bp_tgt
->placed_address
);
5419 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5420 sprintf (p
, ",%x", bp_tgt
->placed_size
);
5423 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5425 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
5428 case PACKET_UNKNOWN
:
5433 internal_error (__FILE__
, __LINE__
,
5434 _("remote_remove_hw_breakpoint: reached end of function"));
5437 /* Some targets are only capable of doing downloads, and afterwards
5438 they switch to the remote serial protocol. This function provides
5439 a clean way to get from the download target to the remote target.
5440 It's basically just a wrapper so that we don't have to expose any
5441 of the internal workings of remote.c.
5443 Prior to calling this routine, you should shutdown the current
5444 target code, else you will get the "A program is being debugged
5445 already..." message. Usually a call to pop_target() suffices. */
5448 push_remote_target (char *name
, int from_tty
)
5450 printf_filtered (_("Switching to remote protocol\n"));
5451 remote_open (name
, from_tty
);
5454 /* Table used by the crc32 function to calcuate the checksum. */
5456 static unsigned long crc32_table
[256] =
5459 static unsigned long
5460 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
5462 if (!crc32_table
[1])
5464 /* Initialize the CRC table and the decoding table. */
5468 for (i
= 0; i
< 256; i
++)
5470 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
5471 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
5478 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
5484 /* compare-sections command
5486 With no arguments, compares each loadable section in the exec bfd
5487 with the same memory range on the target, and reports mismatches.
5488 Useful for verifying the image on the target against the exec file.
5489 Depends on the target understanding the new "qCRC:" request. */
5491 /* FIXME: cagney/1999-10-26: This command should be broken down into a
5492 target method (target verify memory) and generic version of the
5493 actual command. This will allow other high-level code (especially
5494 generic_load()) to make use of this target functionality. */
5497 compare_sections_command (char *args
, int from_tty
)
5499 struct remote_state
*rs
= get_remote_state ();
5501 unsigned long host_crc
, target_crc
;
5502 extern bfd
*exec_bfd
;
5503 struct cleanup
*old_chain
;
5506 const char *sectname
;
5513 error (_("command cannot be used without an exec file"));
5514 if (!current_target
.to_shortname
||
5515 strcmp (current_target
.to_shortname
, "remote") != 0)
5516 error (_("command can only be used with remote target"));
5518 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
5520 if (!(s
->flags
& SEC_LOAD
))
5521 continue; /* skip non-loadable section */
5523 size
= bfd_get_section_size (s
);
5525 continue; /* skip zero-length section */
5527 sectname
= bfd_get_section_name (exec_bfd
, s
);
5528 if (args
&& strcmp (args
, sectname
) != 0)
5529 continue; /* not the section selected by user */
5531 matched
= 1; /* do this section */
5533 /* FIXME: assumes lma can fit into long. */
5534 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
5535 (long) lma
, (long) size
);
5538 /* Be clever; compute the host_crc before waiting for target
5540 sectdata
= xmalloc (size
);
5541 old_chain
= make_cleanup (xfree
, sectdata
);
5542 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
5543 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
5545 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5546 if (rs
->buf
[0] == 'E')
5547 error (_("target memory fault, section %s, range 0x%s -- 0x%s"),
5548 sectname
, paddr (lma
), paddr (lma
+ size
));
5549 if (rs
->buf
[0] != 'C')
5550 error (_("remote target does not support this operation"));
5552 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
5553 target_crc
= target_crc
* 16 + fromhex (*tmp
);
5555 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
5556 sectname
, paddr (lma
), paddr (lma
+ size
));
5557 if (host_crc
== target_crc
)
5558 printf_filtered ("matched.\n");
5561 printf_filtered ("MIS-MATCHED!\n");
5565 do_cleanups (old_chain
);
5568 warning (_("One or more sections of the remote executable does not match\n\
5569 the loaded file\n"));
5570 if (args
&& !matched
)
5571 printf_filtered (_("No loaded section named '%s'.\n"), args
);
5574 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
5575 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
5576 number of bytes read is returned, or 0 for EOF, or -1 for error.
5577 The number of bytes read may be less than LEN without indicating an
5578 EOF. PACKET is checked and updated to indicate whether the remote
5579 target supports this object. */
5582 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
5584 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
5585 struct packet_config
*packet
)
5587 static char *finished_object
;
5588 static char *finished_annex
;
5589 static ULONGEST finished_offset
;
5591 struct remote_state
*rs
= get_remote_state ();
5592 unsigned int total
= 0;
5593 LONGEST i
, n
, packet_len
;
5595 if (packet
->support
== PACKET_DISABLE
)
5598 /* Check whether we've cached an end-of-object packet that matches
5600 if (finished_object
)
5602 if (strcmp (object_name
, finished_object
) == 0
5603 && strcmp (annex
? annex
: "", finished_annex
) == 0
5604 && offset
== finished_offset
)
5607 /* Otherwise, we're now reading something different. Discard
5609 xfree (finished_object
);
5610 xfree (finished_annex
);
5611 finished_object
= NULL
;
5612 finished_annex
= NULL
;
5615 /* Request only enough to fit in a single packet. The actual data
5616 may not, since we don't know how much of it will need to be escaped;
5617 the target is free to respond with slightly less data. We subtract
5618 five to account for the response type and the protocol frame. */
5619 n
= min (get_remote_packet_size () - 5, len
);
5620 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
5621 object_name
, annex
? annex
: "",
5622 phex_nz (offset
, sizeof offset
),
5623 phex_nz (n
, sizeof n
));
5624 i
= putpkt (rs
->buf
);
5629 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
5630 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
5633 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
5634 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
5636 /* 'm' means there is (or at least might be) more data after this
5637 batch. That does not make sense unless there's at least one byte
5638 of data in this reply. */
5639 if (rs
->buf
[0] == 'm' && packet_len
== 1)
5640 error (_("Remote qXfer reply contained no data."));
5642 /* Got some data. */
5643 i
= remote_unescape_input (rs
->buf
+ 1, packet_len
- 1, readbuf
, n
);
5645 /* 'l' is an EOF marker, possibly including a final block of data,
5646 or possibly empty. Record it to bypass the next read, if one is
5648 if (rs
->buf
[0] == 'l')
5650 finished_object
= xstrdup (object_name
);
5651 finished_annex
= xstrdup (annex
? annex
: "");
5652 finished_offset
= offset
+ i
;
5659 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
5660 const char *annex
, gdb_byte
*readbuf
,
5661 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
5663 struct remote_state
*rs
= get_remote_state ();
5668 /* Handle memory using the standard memory routines. */
5669 if (object
== TARGET_OBJECT_MEMORY
)
5674 if (writebuf
!= NULL
)
5675 xfered
= remote_write_bytes (offset
, writebuf
, len
);
5677 xfered
= remote_read_bytes (offset
, readbuf
, len
);
5681 else if (xfered
== 0 && errno
== 0)
5687 /* Only handle flash writes. */
5688 if (writebuf
!= NULL
)
5694 case TARGET_OBJECT_FLASH
:
5695 xfered
= remote_flash_write (ops
, offset
, len
, writebuf
);
5699 else if (xfered
== 0 && errno
== 0)
5709 /* Map pre-existing objects onto letters. DO NOT do this for new
5710 objects!!! Instead specify new query packets. */
5713 case TARGET_OBJECT_AVR
:
5717 case TARGET_OBJECT_AUXV
:
5718 gdb_assert (annex
== NULL
);
5719 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
5720 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
5722 case TARGET_OBJECT_AVAILABLE_FEATURES
:
5723 return remote_read_qxfer
5724 (ops
, "features", annex
, readbuf
, offset
, len
,
5725 &remote_protocol_packets
[PACKET_qXfer_features
]);
5727 case TARGET_OBJECT_MEMORY_MAP
:
5728 gdb_assert (annex
== NULL
);
5729 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
5730 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
5736 /* Note: a zero OFFSET and LEN can be used to query the minimum
5738 if (offset
== 0 && len
== 0)
5739 return (get_remote_packet_size ());
5740 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
5741 large enough let the caller deal with it. */
5742 if (len
< get_remote_packet_size ())
5744 len
= get_remote_packet_size ();
5746 /* Except for querying the minimum buffer size, target must be open. */
5748 error (_("remote query is only available after target open"));
5750 gdb_assert (annex
!= NULL
);
5751 gdb_assert (readbuf
!= NULL
);
5757 /* We used one buffer char for the remote protocol q command and
5758 another for the query type. As the remote protocol encapsulation
5759 uses 4 chars plus one extra in case we are debugging
5760 (remote_debug), we have PBUFZIZ - 7 left to pack the query
5763 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
5765 /* Bad caller may have sent forbidden characters. */
5766 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
5771 gdb_assert (annex
[i
] == '\0');
5773 i
= putpkt (rs
->buf
);
5777 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5778 strcpy ((char *) readbuf
, rs
->buf
);
5780 return strlen ((char *) readbuf
);
5784 remote_rcmd (char *command
,
5785 struct ui_file
*outbuf
)
5787 struct remote_state
*rs
= get_remote_state ();
5791 error (_("remote rcmd is only available after target open"));
5793 /* Send a NULL command across as an empty command. */
5794 if (command
== NULL
)
5797 /* The query prefix. */
5798 strcpy (rs
->buf
, "qRcmd,");
5799 p
= strchr (rs
->buf
, '\0');
5801 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/) > get_remote_packet_size ())
5802 error (_("\"monitor\" command ``%s'' is too long."), command
);
5804 /* Encode the actual command. */
5805 bin2hex ((gdb_byte
*) command
, p
, 0);
5807 if (putpkt (rs
->buf
) < 0)
5808 error (_("Communication problem with target."));
5810 /* get/display the response */
5815 /* XXX - see also tracepoint.c:remote_get_noisy_reply(). */
5817 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5820 error (_("Target does not support this command."));
5821 if (buf
[0] == 'O' && buf
[1] != 'K')
5823 remote_console_output (buf
+ 1); /* 'O' message from stub. */
5826 if (strcmp (buf
, "OK") == 0)
5828 if (strlen (buf
) == 3 && buf
[0] == 'E'
5829 && isdigit (buf
[1]) && isdigit (buf
[2]))
5831 error (_("Protocol error with Rcmd"));
5833 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
5835 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
5836 fputc_unfiltered (c
, outbuf
);
5842 static VEC(mem_region_s
) *
5843 remote_memory_map (struct target_ops
*ops
)
5845 VEC(mem_region_s
) *result
= NULL
;
5846 char *text
= target_read_stralloc (¤t_target
,
5847 TARGET_OBJECT_MEMORY_MAP
, NULL
);
5851 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
5852 result
= parse_memory_map (text
);
5853 do_cleanups (back_to
);
5860 packet_command (char *args
, int from_tty
)
5862 struct remote_state
*rs
= get_remote_state ();
5865 error (_("command can only be used with remote target"));
5868 error (_("remote-packet command requires packet text as argument"));
5870 puts_filtered ("sending: ");
5871 print_packet (args
);
5872 puts_filtered ("\n");
5875 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5876 puts_filtered ("received: ");
5877 print_packet (rs
->buf
);
5878 puts_filtered ("\n");
5882 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
5884 static void display_thread_info (struct gdb_ext_thread_info
*info
);
5886 static void threadset_test_cmd (char *cmd
, int tty
);
5888 static void threadalive_test (char *cmd
, int tty
);
5890 static void threadlist_test_cmd (char *cmd
, int tty
);
5892 int get_and_display_threadinfo (threadref
*ref
);
5894 static void threadinfo_test_cmd (char *cmd
, int tty
);
5896 static int thread_display_step (threadref
*ref
, void *context
);
5898 static void threadlist_update_test_cmd (char *cmd
, int tty
);
5900 static void init_remote_threadtests (void);
5902 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
5905 threadset_test_cmd (char *cmd
, int tty
)
5907 int sample_thread
= SAMPLE_THREAD
;
5909 printf_filtered (_("Remote threadset test\n"));
5910 set_thread (sample_thread
, 1);
5915 threadalive_test (char *cmd
, int tty
)
5917 int sample_thread
= SAMPLE_THREAD
;
5919 if (remote_thread_alive (pid_to_ptid (sample_thread
)))
5920 printf_filtered ("PASS: Thread alive test\n");
5922 printf_filtered ("FAIL: Thread alive test\n");
5925 void output_threadid (char *title
, threadref
*ref
);
5928 output_threadid (char *title
, threadref
*ref
)
5932 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
5934 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
5938 threadlist_test_cmd (char *cmd
, int tty
)
5941 threadref nextthread
;
5942 int done
, result_count
;
5943 threadref threadlist
[3];
5945 printf_filtered ("Remote Threadlist test\n");
5946 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
5947 &result_count
, &threadlist
[0]))
5948 printf_filtered ("FAIL: threadlist test\n");
5951 threadref
*scan
= threadlist
;
5952 threadref
*limit
= scan
+ result_count
;
5954 while (scan
< limit
)
5955 output_threadid (" thread ", scan
++);
5960 display_thread_info (struct gdb_ext_thread_info
*info
)
5962 output_threadid ("Threadid: ", &info
->threadid
);
5963 printf_filtered ("Name: %s\n ", info
->shortname
);
5964 printf_filtered ("State: %s\n", info
->display
);
5965 printf_filtered ("other: %s\n\n", info
->more_display
);
5969 get_and_display_threadinfo (threadref
*ref
)
5973 struct gdb_ext_thread_info threadinfo
;
5975 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
5976 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
5977 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
5978 display_thread_info (&threadinfo
);
5983 threadinfo_test_cmd (char *cmd
, int tty
)
5985 int athread
= SAMPLE_THREAD
;
5989 int_to_threadref (&thread
, athread
);
5990 printf_filtered ("Remote Threadinfo test\n");
5991 if (!get_and_display_threadinfo (&thread
))
5992 printf_filtered ("FAIL cannot get thread info\n");
5996 thread_display_step (threadref
*ref
, void *context
)
5998 /* output_threadid(" threadstep ",ref); *//* simple test */
5999 return get_and_display_threadinfo (ref
);
6003 threadlist_update_test_cmd (char *cmd
, int tty
)
6005 printf_filtered ("Remote Threadlist update test\n");
6006 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
6010 init_remote_threadtests (void)
6012 add_com ("tlist", class_obscure
, threadlist_test_cmd
, _("\
6013 Fetch and print the remote list of thread identifiers, one pkt only"));
6014 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
6015 _("Fetch and display info about one thread"));
6016 add_com ("tset", class_obscure
, threadset_test_cmd
,
6017 _("Test setting to a different thread"));
6018 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
6019 _("Iterate through updating all remote thread info"));
6020 add_com ("talive", class_obscure
, threadalive_test
,
6021 _(" Remote thread alive test "));
6026 /* Convert a thread ID to a string. Returns the string in a static
6030 remote_pid_to_str (ptid_t ptid
)
6032 static char buf
[32];
6034 xsnprintf (buf
, sizeof buf
, "Thread %d", ptid_get_pid (ptid
));
6038 /* Get the address of the thread local variable in OBJFILE which is
6039 stored at OFFSET within the thread local storage for thread PTID. */
6042 remote_get_thread_local_address (ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
6044 if (remote_protocol_packets
[PACKET_qGetTLSAddr
].support
!= PACKET_DISABLE
)
6046 struct remote_state
*rs
= get_remote_state ();
6048 enum packet_result result
;
6050 strcpy (p
, "qGetTLSAddr:");
6052 p
+= hexnumstr (p
, PIDGET (ptid
));
6054 p
+= hexnumstr (p
, offset
);
6056 p
+= hexnumstr (p
, lm
);
6060 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6061 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
6062 if (result
== PACKET_OK
)
6066 unpack_varlen_hex (rs
->buf
, &result
);
6069 else if (result
== PACKET_UNKNOWN
)
6070 throw_error (TLS_GENERIC_ERROR
,
6071 _("Remote target doesn't support qGetTLSAddr packet"));
6073 throw_error (TLS_GENERIC_ERROR
,
6074 _("Remote target failed to process qGetTLSAddr request"));
6077 throw_error (TLS_GENERIC_ERROR
,
6078 _("TLS not supported or disabled on this target"));
6083 /* Support for inferring a target description based on the current
6084 architecture and the size of a 'g' packet. While the 'g' packet
6085 can have any size (since optional registers can be left off the
6086 end), some sizes are easily recognizable given knowledge of the
6087 approximate architecture. */
6089 struct remote_g_packet_guess
6092 const struct target_desc
*tdesc
;
6094 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
6095 DEF_VEC_O(remote_g_packet_guess_s
);
6097 struct remote_g_packet_data
6099 VEC(remote_g_packet_guess_s
) *guesses
;
6102 static struct gdbarch_data
*remote_g_packet_data_handle
;
6105 remote_g_packet_data_init (struct obstack
*obstack
)
6107 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
6111 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
6112 const struct target_desc
*tdesc
)
6114 struct remote_g_packet_data
*data
6115 = gdbarch_data (gdbarch
, remote_g_packet_data_handle
);
6116 struct remote_g_packet_guess new_guess
, *guess
;
6119 gdb_assert (tdesc
!= NULL
);
6122 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
6124 if (guess
->bytes
== bytes
)
6125 internal_error (__FILE__
, __LINE__
,
6126 "Duplicate g packet description added for size %d",
6129 new_guess
.bytes
= bytes
;
6130 new_guess
.tdesc
= tdesc
;
6131 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
6134 static const struct target_desc
*
6135 remote_read_description (struct target_ops
*target
)
6137 struct remote_g_packet_data
*data
6138 = gdbarch_data (current_gdbarch
, remote_g_packet_data_handle
);
6140 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
6142 struct remote_g_packet_guess
*guess
;
6144 int bytes
= send_g_packet ();
6147 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
6149 if (guess
->bytes
== bytes
)
6150 return guess
->tdesc
;
6152 /* We discard the g packet. A minor optimization would be to
6153 hold on to it, and fill the register cache once we have selected
6154 an architecture, but it's too tricky to do safely. */
6161 init_remote_ops (void)
6163 remote_ops
.to_shortname
= "remote";
6164 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
6166 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
6167 Specify the serial device it is connected to\n\
6168 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
6169 remote_ops
.to_open
= remote_open
;
6170 remote_ops
.to_close
= remote_close
;
6171 remote_ops
.to_detach
= remote_detach
;
6172 remote_ops
.to_disconnect
= remote_disconnect
;
6173 remote_ops
.to_resume
= remote_resume
;
6174 remote_ops
.to_wait
= remote_wait
;
6175 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
6176 remote_ops
.to_store_registers
= remote_store_registers
;
6177 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
6178 remote_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
6179 remote_ops
.to_files_info
= remote_files_info
;
6180 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
6181 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
6182 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
6183 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
6184 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
6185 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
6186 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
6187 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
6188 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
6189 remote_ops
.to_kill
= remote_kill
;
6190 remote_ops
.to_load
= generic_load
;
6191 remote_ops
.to_mourn_inferior
= remote_mourn
;
6192 remote_ops
.to_thread_alive
= remote_thread_alive
;
6193 remote_ops
.to_find_new_threads
= remote_threads_info
;
6194 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
6195 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
6196 remote_ops
.to_stop
= remote_stop
;
6197 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
6198 remote_ops
.to_rcmd
= remote_rcmd
;
6199 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
6200 remote_ops
.to_stratum
= process_stratum
;
6201 remote_ops
.to_has_all_memory
= 1;
6202 remote_ops
.to_has_memory
= 1;
6203 remote_ops
.to_has_stack
= 1;
6204 remote_ops
.to_has_registers
= 1;
6205 remote_ops
.to_has_execution
= 1;
6206 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
6207 remote_ops
.to_magic
= OPS_MAGIC
;
6208 remote_ops
.to_memory_map
= remote_memory_map
;
6209 remote_ops
.to_flash_erase
= remote_flash_erase
;
6210 remote_ops
.to_flash_done
= remote_flash_done
;
6211 remote_ops
.to_read_description
= remote_read_description
;
6214 /* Set up the extended remote vector by making a copy of the standard
6215 remote vector and adding to it. */
6218 init_extended_remote_ops (void)
6220 extended_remote_ops
= remote_ops
;
6222 extended_remote_ops
.to_shortname
= "extended-remote";
6223 extended_remote_ops
.to_longname
=
6224 "Extended remote serial target in gdb-specific protocol";
6225 extended_remote_ops
.to_doc
=
6226 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
6227 Specify the serial device it is connected to (e.g. /dev/ttya).",
6228 extended_remote_ops
.to_open
= extended_remote_open
;
6229 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
6230 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
6234 remote_can_async_p (void)
6236 /* We're async whenever the serial device is. */
6237 return (current_target
.to_async_mask_value
) && serial_can_async_p (remote_desc
);
6241 remote_is_async_p (void)
6243 /* We're async whenever the serial device is. */
6244 return (current_target
.to_async_mask_value
) && serial_is_async_p (remote_desc
);
6247 /* Pass the SERIAL event on and up to the client. One day this code
6248 will be able to delay notifying the client of an event until the
6249 point where an entire packet has been received. */
6251 static void (*async_client_callback
) (enum inferior_event_type event_type
,
6253 static void *async_client_context
;
6254 static serial_event_ftype remote_async_serial_handler
;
6257 remote_async_serial_handler (struct serial
*scb
, void *context
)
6259 /* Don't propogate error information up to the client. Instead let
6260 the client find out about the error by querying the target. */
6261 async_client_callback (INF_REG_EVENT
, async_client_context
);
6265 remote_async (void (*callback
) (enum inferior_event_type event_type
,
6266 void *context
), void *context
)
6268 if (current_target
.to_async_mask_value
== 0)
6269 internal_error (__FILE__
, __LINE__
,
6270 _("Calling remote_async when async is masked"));
6272 if (callback
!= NULL
)
6274 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
6275 async_client_callback
= callback
;
6276 async_client_context
= context
;
6279 serial_async (remote_desc
, NULL
, NULL
);
6282 /* Target async and target extended-async.
6284 This are temporary targets, until it is all tested. Eventually
6285 async support will be incorporated int the usual 'remote'
6289 init_remote_async_ops (void)
6291 remote_async_ops
.to_shortname
= "async";
6292 remote_async_ops
.to_longname
=
6293 "Remote serial target in async version of the gdb-specific protocol";
6294 remote_async_ops
.to_doc
=
6295 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
6296 Specify the serial device it is connected to (e.g. /dev/ttya).";
6297 remote_async_ops
.to_open
= remote_async_open
;
6298 remote_async_ops
.to_close
= remote_close
;
6299 remote_async_ops
.to_detach
= remote_detach
;
6300 remote_async_ops
.to_disconnect
= remote_disconnect
;
6301 remote_async_ops
.to_resume
= remote_async_resume
;
6302 remote_async_ops
.to_wait
= remote_async_wait
;
6303 remote_async_ops
.to_fetch_registers
= remote_fetch_registers
;
6304 remote_async_ops
.to_store_registers
= remote_store_registers
;
6305 remote_async_ops
.to_prepare_to_store
= remote_prepare_to_store
;
6306 remote_async_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
6307 remote_async_ops
.to_files_info
= remote_files_info
;
6308 remote_async_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
6309 remote_async_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
6310 remote_async_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
6311 remote_async_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
6312 remote_async_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
6313 remote_async_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
6314 remote_async_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
6315 remote_async_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
6316 remote_async_ops
.to_stopped_data_address
= remote_stopped_data_address
;
6317 remote_async_ops
.to_terminal_inferior
= remote_async_terminal_inferior
;
6318 remote_async_ops
.to_terminal_ours
= remote_async_terminal_ours
;
6319 remote_async_ops
.to_kill
= remote_async_kill
;
6320 remote_async_ops
.to_load
= generic_load
;
6321 remote_async_ops
.to_mourn_inferior
= remote_async_mourn
;
6322 remote_async_ops
.to_thread_alive
= remote_thread_alive
;
6323 remote_async_ops
.to_find_new_threads
= remote_threads_info
;
6324 remote_async_ops
.to_pid_to_str
= remote_pid_to_str
;
6325 remote_async_ops
.to_extra_thread_info
= remote_threads_extra_info
;
6326 remote_async_ops
.to_stop
= remote_stop
;
6327 remote_async_ops
.to_xfer_partial
= remote_xfer_partial
;
6328 remote_async_ops
.to_rcmd
= remote_rcmd
;
6329 remote_async_ops
.to_stratum
= process_stratum
;
6330 remote_async_ops
.to_has_all_memory
= 1;
6331 remote_async_ops
.to_has_memory
= 1;
6332 remote_async_ops
.to_has_stack
= 1;
6333 remote_async_ops
.to_has_registers
= 1;
6334 remote_async_ops
.to_has_execution
= 1;
6335 remote_async_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
6336 remote_async_ops
.to_can_async_p
= remote_can_async_p
;
6337 remote_async_ops
.to_is_async_p
= remote_is_async_p
;
6338 remote_async_ops
.to_async
= remote_async
;
6339 remote_async_ops
.to_async_mask_value
= 1;
6340 remote_async_ops
.to_magic
= OPS_MAGIC
;
6341 remote_async_ops
.to_memory_map
= remote_memory_map
;
6342 remote_async_ops
.to_flash_erase
= remote_flash_erase
;
6343 remote_async_ops
.to_flash_done
= remote_flash_done
;
6344 remote_ops
.to_read_description
= remote_read_description
;
6347 /* Set up the async extended remote vector by making a copy of the standard
6348 remote vector and adding to it. */
6351 init_extended_async_remote_ops (void)
6353 extended_async_remote_ops
= remote_async_ops
;
6355 extended_async_remote_ops
.to_shortname
= "extended-async";
6356 extended_async_remote_ops
.to_longname
=
6357 "Extended remote serial target in async gdb-specific protocol";
6358 extended_async_remote_ops
.to_doc
=
6359 "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
6360 Specify the serial device it is connected to (e.g. /dev/ttya).",
6361 extended_async_remote_ops
.to_open
= extended_remote_async_open
;
6362 extended_async_remote_ops
.to_create_inferior
= extended_remote_async_create_inferior
;
6363 extended_async_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
6367 set_remote_cmd (char *args
, int from_tty
)
6369 help_list (remote_set_cmdlist
, "set remote ", -1, gdb_stdout
);
6373 show_remote_cmd (char *args
, int from_tty
)
6375 /* We can't just use cmd_show_list here, because we want to skip
6376 the redundant "show remote Z-packet" and the legacy aliases. */
6377 struct cleanup
*showlist_chain
;
6378 struct cmd_list_element
*list
= remote_show_cmdlist
;
6380 showlist_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "showlist");
6381 for (; list
!= NULL
; list
= list
->next
)
6382 if (strcmp (list
->name
, "Z-packet") == 0)
6384 else if (list
->type
== not_set_cmd
)
6385 /* Alias commands are exactly like the original, except they
6386 don't have the normal type. */
6390 struct cleanup
*option_chain
6391 = make_cleanup_ui_out_tuple_begin_end (uiout
, "option");
6392 ui_out_field_string (uiout
, "name", list
->name
);
6393 ui_out_text (uiout
, ": ");
6394 if (list
->type
== show_cmd
)
6395 do_setshow_command ((char *) NULL
, from_tty
, list
);
6397 cmd_func (list
, NULL
, from_tty
);
6398 /* Close the tuple. */
6399 do_cleanups (option_chain
);
6402 /* Close the tuple. */
6403 do_cleanups (showlist_chain
);
6407 build_remote_gdbarch_data (void)
6409 remote_address_size
= TARGET_ADDR_BIT
;
6412 /* Saved pointer to previous owner of the new_objfile event. */
6413 static void (*remote_new_objfile_chain
) (struct objfile
*);
6415 /* Function to be called whenever a new objfile (shlib) is detected. */
6417 remote_new_objfile (struct objfile
*objfile
)
6419 if (remote_desc
!= 0) /* Have a remote connection. */
6421 remote_check_symbols (objfile
);
6423 /* Call predecessor on chain, if any. */
6424 if (remote_new_objfile_chain
)
6425 remote_new_objfile_chain (objfile
);
6429 _initialize_remote (void)
6431 struct remote_state
*rs
;
6433 /* architecture specific data */
6434 remote_gdbarch_data_handle
=
6435 gdbarch_data_register_post_init (init_remote_state
);
6436 remote_g_packet_data_handle
=
6437 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
6439 /* Old tacky stuff. NOTE: This comes after the remote protocol so
6440 that the remote protocol has been initialized. */
6441 DEPRECATED_REGISTER_GDBARCH_SWAP (remote_address_size
);
6442 deprecated_register_gdbarch_swap (NULL
, 0, build_remote_gdbarch_data
);
6444 /* Initialize the per-target state. At the moment there is only one
6445 of these, not one per target. Only one target is active at a
6446 time. The default buffer size is unimportant; it will be expanded
6447 whenever a larger buffer is needed. */
6448 rs
= get_remote_state_raw ();
6450 rs
->buf
= xmalloc (rs
->buf_size
);
6453 add_target (&remote_ops
);
6455 init_extended_remote_ops ();
6456 add_target (&extended_remote_ops
);
6458 init_remote_async_ops ();
6459 add_target (&remote_async_ops
);
6461 init_extended_async_remote_ops ();
6462 add_target (&extended_async_remote_ops
);
6464 /* Hook into new objfile notification. */
6465 remote_new_objfile_chain
= deprecated_target_new_objfile_hook
;
6466 deprecated_target_new_objfile_hook
= remote_new_objfile
;
6469 init_remote_threadtests ();
6472 /* set/show remote ... */
6474 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
6475 Remote protocol specific variables\n\
6476 Configure various remote-protocol specific variables such as\n\
6477 the packets being used"),
6478 &remote_set_cmdlist
, "set remote ",
6479 0 /* allow-unknown */, &setlist
);
6480 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
6481 Remote protocol specific variables\n\
6482 Configure various remote-protocol specific variables such as\n\
6483 the packets being used"),
6484 &remote_show_cmdlist
, "show remote ",
6485 0 /* allow-unknown */, &showlist
);
6487 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
6488 Compare section data on target to the exec file.\n\
6489 Argument is a single section name (default: all loaded sections)."),
6492 add_cmd ("packet", class_maintenance
, packet_command
, _("\
6493 Send an arbitrary packet to a remote target.\n\
6494 maintenance packet TEXT\n\
6495 If GDB is talking to an inferior via the GDB serial protocol, then\n\
6496 this command sends the string TEXT to the inferior, and displays the\n\
6497 response packet. GDB supplies the initial `$' character, and the\n\
6498 terminating `#' character and checksum."),
6501 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
6502 Set whether to send break if interrupted."), _("\
6503 Show whether to send break if interrupted."), _("\
6504 If set, a break, instead of a cntrl-c, is sent to the remote target."),
6505 NULL
, NULL
, /* FIXME: i18n: Whether to send break if interrupted is %s. */
6506 &setlist
, &showlist
);
6508 /* Install commands for configuring memory read/write packets. */
6510 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
6511 Set the maximum number of bytes per memory write packet (deprecated)."),
6513 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
6514 Show the maximum number of bytes per memory write packet (deprecated)."),
6516 add_cmd ("memory-write-packet-size", no_class
,
6517 set_memory_write_packet_size
, _("\
6518 Set the maximum number of bytes per memory-write packet.\n\
6519 Specify the number of bytes in a packet or 0 (zero) for the\n\
6520 default packet size. The actual limit is further reduced\n\
6521 dependent on the target. Specify ``fixed'' to disable the\n\
6522 further restriction and ``limit'' to enable that restriction."),
6523 &remote_set_cmdlist
);
6524 add_cmd ("memory-read-packet-size", no_class
,
6525 set_memory_read_packet_size
, _("\
6526 Set the maximum number of bytes per memory-read packet.\n\
6527 Specify the number of bytes in a packet or 0 (zero) for the\n\
6528 default packet size. The actual limit is further reduced\n\
6529 dependent on the target. Specify ``fixed'' to disable the\n\
6530 further restriction and ``limit'' to enable that restriction."),
6531 &remote_set_cmdlist
);
6532 add_cmd ("memory-write-packet-size", no_class
,
6533 show_memory_write_packet_size
,
6534 _("Show the maximum number of bytes per memory-write packet."),
6535 &remote_show_cmdlist
);
6536 add_cmd ("memory-read-packet-size", no_class
,
6537 show_memory_read_packet_size
,
6538 _("Show the maximum number of bytes per memory-read packet."),
6539 &remote_show_cmdlist
);
6541 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
6542 &remote_hw_watchpoint_limit
, _("\
6543 Set the maximum number of target hardware watchpoints."), _("\
6544 Show the maximum number of target hardware watchpoints."), _("\
6545 Specify a negative limit for unlimited."),
6546 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
6547 &remote_set_cmdlist
, &remote_show_cmdlist
);
6548 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
6549 &remote_hw_breakpoint_limit
, _("\
6550 Set the maximum number of target hardware breakpoints."), _("\
6551 Show the maximum number of target hardware breakpoints."), _("\
6552 Specify a negative limit for unlimited."),
6553 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
6554 &remote_set_cmdlist
, &remote_show_cmdlist
);
6556 add_setshow_integer_cmd ("remoteaddresssize", class_obscure
,
6557 &remote_address_size
, _("\
6558 Set the maximum size of the address (in bits) in a memory packet."), _("\
6559 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
6561 NULL
, /* FIXME: i18n: */
6562 &setlist
, &showlist
);
6564 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
6565 "X", "binary-download", 1);
6567 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
6568 "vCont", "verbose-resume", 0);
6570 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
6571 "QPassSignals", "pass-signals", 0);
6573 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
6574 "qSymbol", "symbol-lookup", 0);
6576 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
6577 "P", "set-register", 1);
6579 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
6580 "p", "fetch-register", 1);
6582 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
6583 "Z0", "software-breakpoint", 0);
6585 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
6586 "Z1", "hardware-breakpoint", 0);
6588 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
6589 "Z2", "write-watchpoint", 0);
6591 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
6592 "Z3", "read-watchpoint", 0);
6594 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
6595 "Z4", "access-watchpoint", 0);
6597 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
6598 "qXfer:auxv:read", "read-aux-vector", 0);
6600 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
6601 "qXfer:features:read", "target-features", 0);
6603 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
6604 "qXfer:memory-map:read", "memory-map", 0);
6606 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
6607 "qGetTLSAddr", "get-thread-local-storage-address",
6610 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
6611 "qSupported", "supported-packets", 0);
6613 /* Keep the old ``set remote Z-packet ...'' working. Each individual
6614 Z sub-packet has its own set and show commands, but users may
6615 have sets to this variable in their .gdbinit files (or in their
6617 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
6618 &remote_Z_packet_detect
, _("\
6619 Set use of remote protocol `Z' packets"), _("\
6620 Show use of remote protocol `Z' packets "), _("\
6621 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
6623 set_remote_protocol_Z_packet_cmd
,
6624 show_remote_protocol_Z_packet_cmd
, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
6625 &remote_set_cmdlist
, &remote_show_cmdlist
);
6627 /* Eventually initialize fileio. See fileio.c */
6628 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);