1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
4 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 /* See the GDB User Guide for details of the GDB remote protocol. */
25 #include "gdb_string.h"
31 #include "exceptions.h"
33 /*#include "terminal.h" */
36 #include "gdb-stabs.h"
37 #include "gdbthread.h"
41 #include "gdb_assert.h"
44 #include "cli/cli-decode.h"
45 #include "cli/cli-setshow.h"
46 #include "target-descriptions.h"
51 #include "event-loop.h"
52 #include "event-top.h"
58 #include "gdbcore.h" /* for exec_bfd */
60 #include "remote-fileio.h"
61 #include "gdb/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 remote_files_info (struct target_ops
*ignore
);
90 static void remote_prepare_to_store (struct regcache
*regcache
);
92 static void remote_fetch_registers (struct regcache
*regcache
, int regno
);
94 static void remote_resume (ptid_t ptid
, int step
,
95 enum target_signal siggnal
);
96 static void remote_open (char *name
, int from_tty
);
98 static void extended_remote_open (char *name
, int from_tty
);
100 static void remote_open_1 (char *, int, struct target_ops
*, int extended_p
);
102 static void remote_close (int quitting
);
104 static void remote_store_registers (struct regcache
*regcache
, int regno
);
106 static void remote_mourn (void);
108 static void extended_remote_restart (void);
110 static void extended_remote_mourn (void);
112 static void remote_mourn_1 (struct target_ops
*);
114 static void remote_send (char **buf
, long *sizeof_buf_p
);
116 static int readchar (int timeout
);
118 static ptid_t
remote_wait (ptid_t ptid
,
119 struct target_waitstatus
*status
);
121 static void remote_kill (void);
123 static int tohex (int nib
);
125 static int remote_can_async_p (void);
127 static int remote_is_async_p (void);
129 static void remote_async (void (*callback
) (enum inferior_event_type event_type
,
130 void *context
), void *context
);
132 static int remote_async_mask (int new_mask
);
134 static void remote_detach (char *args
, int from_tty
);
136 static void remote_interrupt (int signo
);
138 static void remote_interrupt_twice (int signo
);
140 static void interrupt_query (void);
142 static void set_general_thread (struct ptid ptid
);
143 static void set_continue_thread (struct ptid ptid
);
145 static int remote_thread_alive (ptid_t
);
147 static void get_offsets (void);
149 static void skip_frame (void);
151 static long read_frame (char **buf_p
, long *sizeof_buf
);
153 static int hexnumlen (ULONGEST num
);
155 static void init_remote_ops (void);
157 static void init_extended_remote_ops (void);
159 static void remote_stop (ptid_t
);
161 static int ishex (int ch
, int *val
);
163 static int stubhex (int ch
);
165 static int hexnumstr (char *, ULONGEST
);
167 static int hexnumnstr (char *, ULONGEST
, int);
169 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
171 static void print_packet (char *);
173 static unsigned long crc32 (unsigned char *, int, unsigned int);
175 static void compare_sections_command (char *, int);
177 static void packet_command (char *, int);
179 static int stub_unpack_int (char *buff
, int fieldlength
);
181 static ptid_t
remote_current_thread (ptid_t oldptid
);
183 static void remote_find_new_threads (void);
185 static void record_currthread (ptid_t currthread
);
187 static int fromhex (int a
);
189 static int hex2bin (const char *hex
, gdb_byte
*bin
, int count
);
191 static int bin2hex (const gdb_byte
*bin
, char *hex
, int count
);
193 static int putpkt_binary (char *buf
, int cnt
);
195 static void check_binary_download (CORE_ADDR addr
);
197 struct packet_config
;
199 static void show_packet_config_cmd (struct packet_config
*config
);
201 static void update_packet_config (struct packet_config
*config
);
203 static void set_remote_protocol_packet_cmd (char *args
, int from_tty
,
204 struct cmd_list_element
*c
);
206 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
208 struct cmd_list_element
*c
,
211 static char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
212 static ptid_t
read_ptid (char *buf
, char **obuf
);
214 static void remote_query_supported (void);
216 static void remote_check_symbols (struct objfile
*objfile
);
218 void _initialize_remote (void);
222 static struct cmd_list_element
*remote_cmdlist
;
224 /* For "set remote" and "show remote". */
226 static struct cmd_list_element
*remote_set_cmdlist
;
227 static struct cmd_list_element
*remote_show_cmdlist
;
229 /* Description of the remote protocol state for the currently
230 connected target. This is per-target state, and independent of the
231 selected architecture. */
235 /* A buffer to use for incoming packets, and its current size. The
236 buffer is grown dynamically for larger incoming packets.
237 Outgoing packets may also be constructed in this buffer.
238 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
239 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
244 /* If we negotiated packet size explicitly (and thus can bypass
245 heuristics for the largest packet size that will not overflow
246 a buffer in the stub), this will be set to that packet size.
247 Otherwise zero, meaning to use the guessed size. */
248 long explicit_packet_size
;
250 /* remote_wait is normally called when the target is running and
251 waits for a stop reply packet. But sometimes we need to call it
252 when the target is already stopped. We can send a "?" packet
253 and have remote_wait read the response. Or, if we already have
254 the response, we can stash it in BUF and tell remote_wait to
255 skip calling getpkt. This flag is set when BUF contains a
256 stop reply packet and the target is not waiting. */
257 int cached_wait_status
;
259 /* True, if in no ack mode. That is, neither GDB nor the stub will
260 expect acks from each other. The connection is assumed to be
264 /* True if we're connected in extended remote mode. */
267 /* True if the stub reported support for multi-process
269 int multi_process_aware
;
271 /* True if we resumed the target and we're waiting for the target to
272 stop. In the mean time, we can't start another command/query.
273 The remote server wouldn't be ready to process it, so we'd
274 timeout waiting for a reply that would never come and eventually
275 we'd close the connection. This can happen in asynchronous mode
276 because we allow GDB commands while the target is running. */
277 int waiting_for_stop_reply
;
280 /* Returns true if the multi-process extensions are in effect. */
282 remote_multi_process_p (struct remote_state
*rs
)
284 return rs
->extended
&& rs
->multi_process_aware
;
287 /* This data could be associated with a target, but we do not always
288 have access to the current target when we need it, so for now it is
289 static. This will be fine for as long as only one target is in use
291 static struct remote_state remote_state
;
293 static struct remote_state
*
294 get_remote_state_raw (void)
296 return &remote_state
;
299 /* Description of the remote protocol for a given architecture. */
303 long offset
; /* Offset into G packet. */
304 long regnum
; /* GDB's internal register number. */
305 LONGEST pnum
; /* Remote protocol register number. */
306 int in_g_packet
; /* Always part of G packet. */
307 /* long size in bytes; == register_size (target_gdbarch, regnum);
309 /* char *name; == gdbarch_register_name (target_gdbarch, regnum);
313 struct remote_arch_state
315 /* Description of the remote protocol registers. */
316 long sizeof_g_packet
;
318 /* Description of the remote protocol registers indexed by REGNUM
319 (making an array gdbarch_num_regs in size). */
320 struct packet_reg
*regs
;
322 /* This is the size (in chars) of the first response to the ``g''
323 packet. It is used as a heuristic when determining the maximum
324 size of memory-read and memory-write packets. A target will
325 typically only reserve a buffer large enough to hold the ``g''
326 packet. The size does not include packet overhead (headers and
328 long actual_register_packet_size
;
330 /* This is the maximum size (in chars) of a non read/write packet.
331 It is also used as a cap on the size of read/write packets. */
332 long remote_packet_size
;
336 /* Handle for retreving the remote protocol data from gdbarch. */
337 static struct gdbarch_data
*remote_gdbarch_data_handle
;
339 static struct remote_arch_state
*
340 get_remote_arch_state (void)
342 return gdbarch_data (target_gdbarch
, remote_gdbarch_data_handle
);
345 /* Fetch the global remote target state. */
347 static struct remote_state
*
348 get_remote_state (void)
350 /* Make sure that the remote architecture state has been
351 initialized, because doing so might reallocate rs->buf. Any
352 function which calls getpkt also needs to be mindful of changes
353 to rs->buf, but this call limits the number of places which run
355 get_remote_arch_state ();
357 return get_remote_state_raw ();
361 compare_pnums (const void *lhs_
, const void *rhs_
)
363 const struct packet_reg
* const *lhs
= lhs_
;
364 const struct packet_reg
* const *rhs
= rhs_
;
366 if ((*lhs
)->pnum
< (*rhs
)->pnum
)
368 else if ((*lhs
)->pnum
== (*rhs
)->pnum
)
375 init_remote_state (struct gdbarch
*gdbarch
)
377 int regnum
, num_remote_regs
, offset
;
378 struct remote_state
*rs
= get_remote_state_raw ();
379 struct remote_arch_state
*rsa
;
380 struct packet_reg
**remote_regs
;
382 rsa
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_arch_state
);
384 /* Use the architecture to build a regnum<->pnum table, which will be
385 1:1 unless a feature set specifies otherwise. */
386 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
,
387 gdbarch_num_regs (gdbarch
),
389 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
391 struct packet_reg
*r
= &rsa
->regs
[regnum
];
393 if (register_size (gdbarch
, regnum
) == 0)
394 /* Do not try to fetch zero-sized (placeholder) registers. */
397 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
402 /* Define the g/G packet format as the contents of each register
403 with a remote protocol number, in order of ascending protocol
406 remote_regs
= alloca (gdbarch_num_regs (gdbarch
)
407 * sizeof (struct packet_reg
*));
408 for (num_remote_regs
= 0, regnum
= 0;
409 regnum
< gdbarch_num_regs (gdbarch
);
411 if (rsa
->regs
[regnum
].pnum
!= -1)
412 remote_regs
[num_remote_regs
++] = &rsa
->regs
[regnum
];
414 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
417 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
419 remote_regs
[regnum
]->in_g_packet
= 1;
420 remote_regs
[regnum
]->offset
= offset
;
421 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
424 /* Record the maximum possible size of the g packet - it may turn out
426 rsa
->sizeof_g_packet
= offset
;
428 /* Default maximum number of characters in a packet body. Many
429 remote stubs have a hardwired buffer size of 400 bytes
430 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
431 as the maximum packet-size to ensure that the packet and an extra
432 NUL character can always fit in the buffer. This stops GDB
433 trashing stubs that try to squeeze an extra NUL into what is
434 already a full buffer (As of 1999-12-04 that was most stubs). */
435 rsa
->remote_packet_size
= 400 - 1;
437 /* This one is filled in when a ``g'' packet is received. */
438 rsa
->actual_register_packet_size
= 0;
440 /* Should rsa->sizeof_g_packet needs more space than the
441 default, adjust the size accordingly. Remember that each byte is
442 encoded as two characters. 32 is the overhead for the packet
443 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
444 (``$NN:G...#NN'') is a better guess, the below has been padded a
446 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
447 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
449 /* Make sure that the packet buffer is plenty big enough for
450 this architecture. */
451 if (rs
->buf_size
< rsa
->remote_packet_size
)
453 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
454 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
460 /* Return the current allowed size of a remote packet. This is
461 inferred from the current architecture, and should be used to
462 limit the length of outgoing packets. */
464 get_remote_packet_size (void)
466 struct remote_state
*rs
= get_remote_state ();
467 struct remote_arch_state
*rsa
= get_remote_arch_state ();
469 if (rs
->explicit_packet_size
)
470 return rs
->explicit_packet_size
;
472 return rsa
->remote_packet_size
;
475 static struct packet_reg
*
476 packet_reg_from_regnum (struct remote_arch_state
*rsa
, long regnum
)
478 if (regnum
< 0 && regnum
>= gdbarch_num_regs (target_gdbarch
))
482 struct packet_reg
*r
= &rsa
->regs
[regnum
];
483 gdb_assert (r
->regnum
== regnum
);
488 static struct packet_reg
*
489 packet_reg_from_pnum (struct remote_arch_state
*rsa
, LONGEST pnum
)
492 for (i
= 0; i
< gdbarch_num_regs (target_gdbarch
); i
++)
494 struct packet_reg
*r
= &rsa
->regs
[i
];
501 /* FIXME: graces/2002-08-08: These variables should eventually be
502 bound to an instance of the target object (as in gdbarch-tdep()),
503 when such a thing exists. */
505 /* This is set to the data address of the access causing the target
506 to stop for a watchpoint. */
507 static CORE_ADDR remote_watch_data_address
;
509 /* This is non-zero if target stopped for a watchpoint. */
510 static int remote_stopped_by_watchpoint_p
;
512 static struct target_ops remote_ops
;
514 static struct target_ops extended_remote_ops
;
516 static int remote_async_mask_value
= 1;
518 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
519 ``forever'' still use the normal timeout mechanism. This is
520 currently used by the ASYNC code to guarentee that target reads
521 during the initial connect always time-out. Once getpkt has been
522 modified to return a timeout indication and, in turn
523 remote_wait()/wait_for_inferior() have gained a timeout parameter
525 static int wait_forever_enabled_p
= 1;
528 /* This variable chooses whether to send a ^C or a break when the user
529 requests program interruption. Although ^C is usually what remote
530 systems expect, and that is the default here, sometimes a break is
531 preferable instead. */
533 static int remote_break
;
535 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
536 remote_open knows that we don't have a file open when the program
538 static struct serial
*remote_desc
= NULL
;
540 /* This variable sets the number of bits in an address that are to be
541 sent in a memory ("M" or "m") packet. Normally, after stripping
542 leading zeros, the entire address would be sent. This variable
543 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
544 initial implementation of remote.c restricted the address sent in
545 memory packets to ``host::sizeof long'' bytes - (typically 32
546 bits). Consequently, for 64 bit targets, the upper 32 bits of an
547 address was never sent. Since fixing this bug may cause a break in
548 some remote targets this variable is principly provided to
549 facilitate backward compatibility. */
551 static int remote_address_size
;
553 /* Temporary to track who currently owns the terminal. See
554 remote_terminal_* for more details. */
556 static int remote_async_terminal_ours_p
;
558 /* The executable file to use for "run" on the remote side. */
560 static char *remote_exec_file
= "";
563 /* User configurable variables for the number of characters in a
564 memory read/write packet. MIN (rsa->remote_packet_size,
565 rsa->sizeof_g_packet) is the default. Some targets need smaller
566 values (fifo overruns, et.al.) and some users need larger values
567 (speed up transfers). The variables ``preferred_*'' (the user
568 request), ``current_*'' (what was actually set) and ``forced_*''
569 (Positive - a soft limit, negative - a hard limit). */
571 struct memory_packet_config
578 /* Compute the current size of a read/write packet. Since this makes
579 use of ``actual_register_packet_size'' the computation is dynamic. */
582 get_memory_packet_size (struct memory_packet_config
*config
)
584 struct remote_state
*rs
= get_remote_state ();
585 struct remote_arch_state
*rsa
= get_remote_arch_state ();
587 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
588 law?) that some hosts don't cope very well with large alloca()
589 calls. Eventually the alloca() code will be replaced by calls to
590 xmalloc() and make_cleanups() allowing this restriction to either
591 be lifted or removed. */
592 #ifndef MAX_REMOTE_PACKET_SIZE
593 #define MAX_REMOTE_PACKET_SIZE 16384
595 /* NOTE: 20 ensures we can write at least one byte. */
596 #ifndef MIN_REMOTE_PACKET_SIZE
597 #define MIN_REMOTE_PACKET_SIZE 20
602 if (config
->size
<= 0)
603 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
605 what_they_get
= config
->size
;
609 what_they_get
= get_remote_packet_size ();
610 /* Limit the packet to the size specified by the user. */
612 && what_they_get
> config
->size
)
613 what_they_get
= config
->size
;
615 /* Limit it to the size of the targets ``g'' response unless we have
616 permission from the stub to use a larger packet size. */
617 if (rs
->explicit_packet_size
== 0
618 && rsa
->actual_register_packet_size
> 0
619 && what_they_get
> rsa
->actual_register_packet_size
)
620 what_they_get
= rsa
->actual_register_packet_size
;
622 if (what_they_get
> MAX_REMOTE_PACKET_SIZE
)
623 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
624 if (what_they_get
< MIN_REMOTE_PACKET_SIZE
)
625 what_they_get
= MIN_REMOTE_PACKET_SIZE
;
627 /* Make sure there is room in the global buffer for this packet
628 (including its trailing NUL byte). */
629 if (rs
->buf_size
< what_they_get
+ 1)
631 rs
->buf_size
= 2 * what_they_get
;
632 rs
->buf
= xrealloc (rs
->buf
, 2 * what_they_get
);
635 return what_they_get
;
638 /* Update the size of a read/write packet. If they user wants
639 something really big then do a sanity check. */
642 set_memory_packet_size (char *args
, struct memory_packet_config
*config
)
644 int fixed_p
= config
->fixed_p
;
645 long size
= config
->size
;
647 error (_("Argument required (integer, `fixed' or `limited')."));
648 else if (strcmp (args
, "hard") == 0
649 || strcmp (args
, "fixed") == 0)
651 else if (strcmp (args
, "soft") == 0
652 || strcmp (args
, "limit") == 0)
657 size
= strtoul (args
, &end
, 0);
659 error (_("Invalid %s (bad syntax)."), config
->name
);
661 /* Instead of explicitly capping the size of a packet to
662 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
663 instead allowed to set the size to something arbitrarily
665 if (size
> MAX_REMOTE_PACKET_SIZE
)
666 error (_("Invalid %s (too large)."), config
->name
);
670 if (fixed_p
&& !config
->fixed_p
)
672 if (! query (_("The target may not be able to correctly handle a %s\n"
673 "of %ld bytes. Change the packet size? "),
675 error (_("Packet size not changed."));
677 /* Update the config. */
678 config
->fixed_p
= fixed_p
;
683 show_memory_packet_size (struct memory_packet_config
*config
)
685 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
687 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
688 get_memory_packet_size (config
));
690 printf_filtered (_("Packets are limited to %ld bytes.\n"),
691 get_memory_packet_size (config
));
694 static struct memory_packet_config memory_write_packet_config
=
696 "memory-write-packet-size",
700 set_memory_write_packet_size (char *args
, int from_tty
)
702 set_memory_packet_size (args
, &memory_write_packet_config
);
706 show_memory_write_packet_size (char *args
, int from_tty
)
708 show_memory_packet_size (&memory_write_packet_config
);
712 get_memory_write_packet_size (void)
714 return get_memory_packet_size (&memory_write_packet_config
);
717 static struct memory_packet_config memory_read_packet_config
=
719 "memory-read-packet-size",
723 set_memory_read_packet_size (char *args
, int from_tty
)
725 set_memory_packet_size (args
, &memory_read_packet_config
);
729 show_memory_read_packet_size (char *args
, int from_tty
)
731 show_memory_packet_size (&memory_read_packet_config
);
735 get_memory_read_packet_size (void)
737 long size
= get_memory_packet_size (&memory_read_packet_config
);
738 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
739 extra buffer size argument before the memory read size can be
740 increased beyond this. */
741 if (size
> get_remote_packet_size ())
742 size
= get_remote_packet_size ();
747 /* Generic configuration support for packets the stub optionally
748 supports. Allows the user to specify the use of the packet as well
749 as allowing GDB to auto-detect support in the remote stub. */
753 PACKET_SUPPORT_UNKNOWN
= 0,
762 enum auto_boolean detect
;
763 enum packet_support support
;
766 /* Analyze a packet's return value and update the packet config
777 update_packet_config (struct packet_config
*config
)
779 switch (config
->detect
)
781 case AUTO_BOOLEAN_TRUE
:
782 config
->support
= PACKET_ENABLE
;
784 case AUTO_BOOLEAN_FALSE
:
785 config
->support
= PACKET_DISABLE
;
787 case AUTO_BOOLEAN_AUTO
:
788 config
->support
= PACKET_SUPPORT_UNKNOWN
;
794 show_packet_config_cmd (struct packet_config
*config
)
796 char *support
= "internal-error";
797 switch (config
->support
)
803 support
= "disabled";
805 case PACKET_SUPPORT_UNKNOWN
:
809 switch (config
->detect
)
811 case AUTO_BOOLEAN_AUTO
:
812 printf_filtered (_("Support for the `%s' packet is auto-detected, currently %s.\n"),
813 config
->name
, support
);
815 case AUTO_BOOLEAN_TRUE
:
816 case AUTO_BOOLEAN_FALSE
:
817 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
818 config
->name
, support
);
824 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
825 const char *title
, int legacy
)
832 config
->title
= title
;
833 config
->detect
= AUTO_BOOLEAN_AUTO
;
834 config
->support
= PACKET_SUPPORT_UNKNOWN
;
835 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
837 show_doc
= xstrprintf ("Show current use of remote protocol `%s' (%s) packet",
839 /* set/show TITLE-packet {auto,on,off} */
840 cmd_name
= xstrprintf ("%s-packet", title
);
841 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
842 &config
->detect
, set_doc
, show_doc
, NULL
, /* help_doc */
843 set_remote_protocol_packet_cmd
,
844 show_remote_protocol_packet_cmd
,
845 &remote_set_cmdlist
, &remote_show_cmdlist
);
846 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
850 legacy_name
= xstrprintf ("%s-packet", name
);
851 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
852 &remote_set_cmdlist
);
853 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
854 &remote_show_cmdlist
);
858 static enum packet_result
859 packet_check_result (const char *buf
)
863 /* The stub recognized the packet request. Check that the
864 operation succeeded. */
866 && isxdigit (buf
[1]) && isxdigit (buf
[2])
868 /* "Enn" - definitly an error. */
871 /* Always treat "E." as an error. This will be used for
872 more verbose error messages, such as E.memtypes. */
873 if (buf
[0] == 'E' && buf
[1] == '.')
876 /* The packet may or may not be OK. Just assume it is. */
880 /* The stub does not support the packet. */
881 return PACKET_UNKNOWN
;
884 static enum packet_result
885 packet_ok (const char *buf
, struct packet_config
*config
)
887 enum packet_result result
;
889 result
= packet_check_result (buf
);
894 /* The stub recognized the packet request. */
895 switch (config
->support
)
897 case PACKET_SUPPORT_UNKNOWN
:
899 fprintf_unfiltered (gdb_stdlog
,
900 "Packet %s (%s) is supported\n",
901 config
->name
, config
->title
);
902 config
->support
= PACKET_ENABLE
;
905 internal_error (__FILE__
, __LINE__
,
906 _("packet_ok: attempt to use a disabled packet"));
913 /* The stub does not support the packet. */
914 switch (config
->support
)
917 if (config
->detect
== AUTO_BOOLEAN_AUTO
)
918 /* If the stub previously indicated that the packet was
919 supported then there is a protocol error.. */
920 error (_("Protocol error: %s (%s) conflicting enabled responses."),
921 config
->name
, config
->title
);
923 /* The user set it wrong. */
924 error (_("Enabled packet %s (%s) not recognized by stub"),
925 config
->name
, config
->title
);
927 case PACKET_SUPPORT_UNKNOWN
:
929 fprintf_unfiltered (gdb_stdlog
,
930 "Packet %s (%s) is NOT supported\n",
931 config
->name
, config
->title
);
932 config
->support
= PACKET_DISABLE
;
960 PACKET_qXfer_features
,
961 PACKET_qXfer_libraries
,
962 PACKET_qXfer_memory_map
,
963 PACKET_qXfer_spu_read
,
964 PACKET_qXfer_spu_write
,
968 PACKET_qSearch_memory
,
971 PACKET_QStartNoAckMode
,
976 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
979 set_remote_protocol_packet_cmd (char *args
, int from_tty
,
980 struct cmd_list_element
*c
)
982 struct packet_config
*packet
;
984 for (packet
= remote_protocol_packets
;
985 packet
< &remote_protocol_packets
[PACKET_MAX
];
988 if (&packet
->detect
== c
->var
)
990 update_packet_config (packet
);
994 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
999 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
1000 struct cmd_list_element
*c
,
1003 struct packet_config
*packet
;
1005 for (packet
= remote_protocol_packets
;
1006 packet
< &remote_protocol_packets
[PACKET_MAX
];
1009 if (&packet
->detect
== c
->var
)
1011 show_packet_config_cmd (packet
);
1015 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
1019 /* Should we try one of the 'Z' requests? */
1023 Z_PACKET_SOFTWARE_BP
,
1024 Z_PACKET_HARDWARE_BP
,
1031 /* For compatibility with older distributions. Provide a ``set remote
1032 Z-packet ...'' command that updates all the Z packet types. */
1034 static enum auto_boolean remote_Z_packet_detect
;
1037 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
1038 struct cmd_list_element
*c
)
1041 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1043 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
1044 update_packet_config (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1049 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
1050 struct cmd_list_element
*c
,
1054 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1056 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1060 /* Should we try the 'ThreadInfo' query packet?
1062 This variable (NOT available to the user: auto-detect only!)
1063 determines whether GDB will use the new, simpler "ThreadInfo"
1064 query or the older, more complex syntax for thread queries.
1065 This is an auto-detect variable (set to true at each connect,
1066 and set to false when the target fails to recognize it). */
1068 static int use_threadinfo_query
;
1069 static int use_threadextra_query
;
1071 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1072 static struct async_signal_handler
*sigint_remote_twice_token
;
1073 static struct async_signal_handler
*sigint_remote_token
;
1077 static ptid_t magic_null_ptid
;
1078 static ptid_t not_sent_ptid
;
1079 static ptid_t any_thread_ptid
;
1081 /* These are the threads which we last sent to the remote system. The
1082 TID member will be -1 for all or -2 for not sent yet. */
1084 static ptid_t general_thread
;
1085 static ptid_t continue_thread
;
1088 /* Call this function as a result of
1089 1) A halt indication (T packet) containing a thread id
1090 2) A direct query of currthread
1091 3) Successful execution of set thread
1095 record_currthread (ptid_t currthread
)
1097 general_thread
= currthread
;
1099 /* If this is a new thread, add it to GDB's thread list.
1100 If we leave it up to WFI to do this, bad things will happen. */
1102 if (in_thread_list (currthread
) && is_exited (currthread
))
1104 /* We're seeing an event on a thread id we knew had exited.
1105 This has to be a new thread reusing the old id. Add it. */
1106 add_thread (currthread
);
1110 if (!in_thread_list (currthread
))
1112 if (ptid_equal (pid_to_ptid (ptid_get_pid (currthread
)), inferior_ptid
))
1114 /* inferior_ptid has no thread member yet. This can happen
1115 with the vAttach -> remote_wait,"TAAthread:" path if the
1116 stub doesn't support qC. This is the first stop reported
1117 after an attach, so this is the main thread. Update the
1118 ptid in the thread list. */
1119 thread_change_ptid (inferior_ptid
, currthread
);
1123 if (ptid_equal (magic_null_ptid
, inferior_ptid
))
1125 /* inferior_ptid is not set yet. This can happen with the
1126 vRun -> remote_wait,"TAAthread:" path if the stub
1127 doesn't support qC. This is the first stop reported
1128 after an attach, so this is the main thread. Update the
1129 ptid in the thread list. */
1130 thread_change_ptid (inferior_ptid
, currthread
);
1134 /* This is really a new thread. Add it. */
1135 add_thread (currthread
);
1138 if (!in_inferior_list (ptid_get_pid (currthread
)))
1139 /* When connecting to a target remote, or to a target
1140 extended-remote which already was debugging an inferior, we may
1141 not know about it yet --- add it. */
1142 add_inferior (ptid_get_pid (currthread
));
1145 static char *last_pass_packet
;
1147 /* If 'QPassSignals' is supported, tell the remote stub what signals
1148 it can simply pass through to the inferior without reporting. */
1151 remote_pass_signals (void)
1153 if (remote_protocol_packets
[PACKET_QPassSignals
].support
!= PACKET_DISABLE
)
1155 char *pass_packet
, *p
;
1156 int numsigs
= (int) TARGET_SIGNAL_LAST
;
1159 gdb_assert (numsigs
< 256);
1160 for (i
= 0; i
< numsigs
; i
++)
1162 if (signal_stop_state (i
) == 0
1163 && signal_print_state (i
) == 0
1164 && signal_pass_state (i
) == 1)
1167 pass_packet
= xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
1168 strcpy (pass_packet
, "QPassSignals:");
1169 p
= pass_packet
+ strlen (pass_packet
);
1170 for (i
= 0; i
< numsigs
; i
++)
1172 if (signal_stop_state (i
) == 0
1173 && signal_print_state (i
) == 0
1174 && signal_pass_state (i
) == 1)
1177 *p
++ = tohex (i
>> 4);
1178 *p
++ = tohex (i
& 15);
1187 if (!last_pass_packet
|| strcmp (last_pass_packet
, pass_packet
))
1189 struct remote_state
*rs
= get_remote_state ();
1190 char *buf
= rs
->buf
;
1192 putpkt (pass_packet
);
1193 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1194 packet_ok (buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
1195 if (last_pass_packet
)
1196 xfree (last_pass_packet
);
1197 last_pass_packet
= pass_packet
;
1200 xfree (pass_packet
);
1204 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
1205 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
1206 thread. If GEN is set, set the general thread, if not, then set
1207 the step/continue thread. */
1209 set_thread (struct ptid ptid
, int gen
)
1211 struct remote_state
*rs
= get_remote_state ();
1212 ptid_t state
= gen
? general_thread
: continue_thread
;
1213 char *buf
= rs
->buf
;
1214 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
1216 if (ptid_equal (state
, ptid
))
1220 *buf
++ = gen
? 'g' : 'c';
1221 if (ptid_equal (ptid
, magic_null_ptid
))
1222 xsnprintf (buf
, endbuf
- buf
, "0");
1223 else if (ptid_equal (ptid
, any_thread_ptid
))
1224 xsnprintf (buf
, endbuf
- buf
, "0");
1225 else if (ptid_equal (ptid
, minus_one_ptid
))
1226 xsnprintf (buf
, endbuf
- buf
, "-1");
1228 write_ptid (buf
, endbuf
, ptid
);
1230 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1232 general_thread
= ptid
;
1234 continue_thread
= ptid
;
1238 set_general_thread (struct ptid ptid
)
1240 set_thread (ptid
, 1);
1244 set_continue_thread (struct ptid ptid
)
1246 set_thread (ptid
, 0);
1250 /* Return nonzero if the thread PTID is still alive on the remote
1254 remote_thread_alive (ptid_t ptid
)
1256 struct remote_state
*rs
= get_remote_state ();
1257 int tid
= ptid_get_tid (ptid
);
1260 if (ptid_equal (ptid
, magic_null_ptid
))
1261 /* The main thread is always alive. */
1264 if (ptid_get_pid (ptid
) != 0 && ptid_get_tid (ptid
) == 0)
1265 /* The main thread is always alive. This can happen after a
1266 vAttach, if the remote side doesn't support
1271 endp
= rs
->buf
+ get_remote_packet_size ();
1274 write_ptid (p
, endp
, ptid
);
1277 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1278 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
1281 /* About these extended threadlist and threadinfo packets. They are
1282 variable length packets but, the fields within them are often fixed
1283 length. They are redundent enough to send over UDP as is the
1284 remote protocol in general. There is a matching unit test module
1287 #define OPAQUETHREADBYTES 8
1289 /* a 64 bit opaque identifier */
1290 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
1292 /* WARNING: This threadref data structure comes from the remote O.S.,
1293 libstub protocol encoding, and remote.c. it is not particularly
1296 /* Right now, the internal structure is int. We want it to be bigger.
1300 typedef int gdb_threadref
; /* Internal GDB thread reference. */
1302 /* gdb_ext_thread_info is an internal GDB data structure which is
1303 equivalent to the reply of the remote threadinfo packet. */
1305 struct gdb_ext_thread_info
1307 threadref threadid
; /* External form of thread reference. */
1308 int active
; /* Has state interesting to GDB?
1310 char display
[256]; /* Brief state display, name,
1311 blocked/suspended. */
1312 char shortname
[32]; /* To be used to name threads. */
1313 char more_display
[256]; /* Long info, statistics, queue depth,
1317 /* The volume of remote transfers can be limited by submitting
1318 a mask containing bits specifying the desired information.
1319 Use a union of these values as the 'selection' parameter to
1320 get_thread_info. FIXME: Make these TAG names more thread specific.
1323 #define TAG_THREADID 1
1324 #define TAG_EXISTS 2
1325 #define TAG_DISPLAY 4
1326 #define TAG_THREADNAME 8
1327 #define TAG_MOREDISPLAY 16
1329 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1331 char *unpack_varlen_hex (char *buff
, ULONGEST
*result
);
1333 static char *unpack_nibble (char *buf
, int *val
);
1335 static char *pack_nibble (char *buf
, int nibble
);
1337 static char *pack_hex_byte (char *pkt
, int /* unsigned char */ byte
);
1339 static char *unpack_byte (char *buf
, int *value
);
1341 static char *pack_int (char *buf
, int value
);
1343 static char *unpack_int (char *buf
, int *value
);
1345 static char *unpack_string (char *src
, char *dest
, int length
);
1347 static char *pack_threadid (char *pkt
, threadref
*id
);
1349 static char *unpack_threadid (char *inbuf
, threadref
*id
);
1351 void int_to_threadref (threadref
*id
, int value
);
1353 static int threadref_to_int (threadref
*ref
);
1355 static void copy_threadref (threadref
*dest
, threadref
*src
);
1357 static int threadmatch (threadref
*dest
, threadref
*src
);
1359 static char *pack_threadinfo_request (char *pkt
, int mode
,
1362 static int remote_unpack_thread_info_response (char *pkt
,
1363 threadref
*expectedref
,
1364 struct gdb_ext_thread_info
1368 static int remote_get_threadinfo (threadref
*threadid
,
1369 int fieldset
, /*TAG mask */
1370 struct gdb_ext_thread_info
*info
);
1372 static char *pack_threadlist_request (char *pkt
, int startflag
,
1374 threadref
*nextthread
);
1376 static int parse_threadlist_response (char *pkt
,
1378 threadref
*original_echo
,
1379 threadref
*resultlist
,
1382 static int remote_get_threadlist (int startflag
,
1383 threadref
*nextthread
,
1387 threadref
*threadlist
);
1389 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
1391 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
1392 void *context
, int looplimit
);
1394 static int remote_newthread_step (threadref
*ref
, void *context
);
1397 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
1398 buffer we're allowed to write to. Returns
1399 BUF+CHARACTERS_WRITTEN. */
1402 write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
1405 struct remote_state
*rs
= get_remote_state ();
1407 if (remote_multi_process_p (rs
))
1409 pid
= ptid_get_pid (ptid
);
1411 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
1413 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
1415 tid
= ptid_get_tid (ptid
);
1417 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
1419 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
1424 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
1425 passed the last parsed char. Returns null_ptid on error. */
1428 read_ptid (char *buf
, char **obuf
)
1432 ULONGEST pid
= 0, tid
= 0;
1437 /* Multi-process ptid. */
1438 pp
= unpack_varlen_hex (p
+ 1, &pid
);
1440 error (_("invalid remote ptid: %s\n"), p
);
1443 pp
= unpack_varlen_hex (p
+ 1, &tid
);
1446 return ptid_build (pid
, 0, tid
);
1449 /* No multi-process. Just a tid. */
1450 pp
= unpack_varlen_hex (p
, &tid
);
1452 /* Since the stub is not sending a process id, then default to
1453 what's in inferior_ptid. */
1454 pid
= ptid_get_pid (inferior_ptid
);
1458 return ptid_build (pid
, 0, tid
);
1461 /* Encode 64 bits in 16 chars of hex. */
1463 static const char hexchars
[] = "0123456789abcdef";
1466 ishex (int ch
, int *val
)
1468 if ((ch
>= 'a') && (ch
<= 'f'))
1470 *val
= ch
- 'a' + 10;
1473 if ((ch
>= 'A') && (ch
<= 'F'))
1475 *val
= ch
- 'A' + 10;
1478 if ((ch
>= '0') && (ch
<= '9'))
1489 if (ch
>= 'a' && ch
<= 'f')
1490 return ch
- 'a' + 10;
1491 if (ch
>= '0' && ch
<= '9')
1493 if (ch
>= 'A' && ch
<= 'F')
1494 return ch
- 'A' + 10;
1499 stub_unpack_int (char *buff
, int fieldlength
)
1506 nibble
= stubhex (*buff
++);
1510 retval
= retval
<< 4;
1516 unpack_varlen_hex (char *buff
, /* packet to parse */
1520 ULONGEST retval
= 0;
1522 while (ishex (*buff
, &nibble
))
1525 retval
= retval
<< 4;
1526 retval
|= nibble
& 0x0f;
1533 unpack_nibble (char *buf
, int *val
)
1535 *val
= fromhex (*buf
++);
1540 pack_nibble (char *buf
, int nibble
)
1542 *buf
++ = hexchars
[(nibble
& 0x0f)];
1547 pack_hex_byte (char *pkt
, int byte
)
1549 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
1550 *pkt
++ = hexchars
[(byte
& 0xf)];
1555 unpack_byte (char *buf
, int *value
)
1557 *value
= stub_unpack_int (buf
, 2);
1562 pack_int (char *buf
, int value
)
1564 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
1565 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
1566 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
1567 buf
= pack_hex_byte (buf
, (value
& 0xff));
1572 unpack_int (char *buf
, int *value
)
1574 *value
= stub_unpack_int (buf
, 8);
1578 #if 0 /* Currently unused, uncomment when needed. */
1579 static char *pack_string (char *pkt
, char *string
);
1582 pack_string (char *pkt
, char *string
)
1587 len
= strlen (string
);
1589 len
= 200; /* Bigger than most GDB packets, junk??? */
1590 pkt
= pack_hex_byte (pkt
, len
);
1594 if ((ch
== '\0') || (ch
== '#'))
1595 ch
= '*'; /* Protect encapsulation. */
1600 #endif /* 0 (unused) */
1603 unpack_string (char *src
, char *dest
, int length
)
1612 pack_threadid (char *pkt
, threadref
*id
)
1615 unsigned char *altid
;
1617 altid
= (unsigned char *) id
;
1618 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
1620 pkt
= pack_hex_byte (pkt
, *altid
++);
1626 unpack_threadid (char *inbuf
, threadref
*id
)
1629 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
1632 altref
= (char *) id
;
1634 while (inbuf
< limit
)
1636 x
= stubhex (*inbuf
++);
1637 y
= stubhex (*inbuf
++);
1638 *altref
++ = (x
<< 4) | y
;
1643 /* Externally, threadrefs are 64 bits but internally, they are still
1644 ints. This is due to a mismatch of specifications. We would like
1645 to use 64bit thread references internally. This is an adapter
1649 int_to_threadref (threadref
*id
, int value
)
1651 unsigned char *scan
;
1653 scan
= (unsigned char *) id
;
1659 *scan
++ = (value
>> 24) & 0xff;
1660 *scan
++ = (value
>> 16) & 0xff;
1661 *scan
++ = (value
>> 8) & 0xff;
1662 *scan
++ = (value
& 0xff);
1666 threadref_to_int (threadref
*ref
)
1669 unsigned char *scan
;
1675 value
= (value
<< 8) | ((*scan
++) & 0xff);
1680 copy_threadref (threadref
*dest
, threadref
*src
)
1683 unsigned char *csrc
, *cdest
;
1685 csrc
= (unsigned char *) src
;
1686 cdest
= (unsigned char *) dest
;
1693 threadmatch (threadref
*dest
, threadref
*src
)
1695 /* Things are broken right now, so just assume we got a match. */
1697 unsigned char *srcp
, *destp
;
1699 srcp
= (char *) src
;
1700 destp
= (char *) dest
;
1704 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
1711 threadid:1, # always request threadid
1718 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1721 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
1723 *pkt
++ = 'q'; /* Info Query */
1724 *pkt
++ = 'P'; /* process or thread info */
1725 pkt
= pack_int (pkt
, mode
); /* mode */
1726 pkt
= pack_threadid (pkt
, id
); /* threadid */
1727 *pkt
= '\0'; /* terminate */
1731 /* These values tag the fields in a thread info response packet. */
1732 /* Tagging the fields allows us to request specific fields and to
1733 add more fields as time goes by. */
1735 #define TAG_THREADID 1 /* Echo the thread identifier. */
1736 #define TAG_EXISTS 2 /* Is this process defined enough to
1737 fetch registers and its stack? */
1738 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1739 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
1740 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1744 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
1745 struct gdb_ext_thread_info
*info
)
1747 struct remote_state
*rs
= get_remote_state ();
1751 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
1754 /* info->threadid = 0; FIXME: implement zero_threadref. */
1756 info
->display
[0] = '\0';
1757 info
->shortname
[0] = '\0';
1758 info
->more_display
[0] = '\0';
1760 /* Assume the characters indicating the packet type have been
1762 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
1763 pkt
= unpack_threadid (pkt
, &ref
);
1766 warning (_("Incomplete response to threadinfo request."));
1767 if (!threadmatch (&ref
, expectedref
))
1768 { /* This is an answer to a different request. */
1769 warning (_("ERROR RMT Thread info mismatch."));
1772 copy_threadref (&info
->threadid
, &ref
);
1774 /* Loop on tagged fields , try to bail if somthing goes wrong. */
1776 /* Packets are terminated with nulls. */
1777 while ((pkt
< limit
) && mask
&& *pkt
)
1779 pkt
= unpack_int (pkt
, &tag
); /* tag */
1780 pkt
= unpack_byte (pkt
, &length
); /* length */
1781 if (!(tag
& mask
)) /* Tags out of synch with mask. */
1783 warning (_("ERROR RMT: threadinfo tag mismatch."));
1787 if (tag
== TAG_THREADID
)
1791 warning (_("ERROR RMT: length of threadid is not 16."));
1795 pkt
= unpack_threadid (pkt
, &ref
);
1796 mask
= mask
& ~TAG_THREADID
;
1799 if (tag
== TAG_EXISTS
)
1801 info
->active
= stub_unpack_int (pkt
, length
);
1803 mask
= mask
& ~(TAG_EXISTS
);
1806 warning (_("ERROR RMT: 'exists' length too long."));
1812 if (tag
== TAG_THREADNAME
)
1814 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
1815 mask
= mask
& ~TAG_THREADNAME
;
1818 if (tag
== TAG_DISPLAY
)
1820 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
1821 mask
= mask
& ~TAG_DISPLAY
;
1824 if (tag
== TAG_MOREDISPLAY
)
1826 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
1827 mask
= mask
& ~TAG_MOREDISPLAY
;
1830 warning (_("ERROR RMT: unknown thread info tag."));
1831 break; /* Not a tag we know about. */
1837 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
1838 struct gdb_ext_thread_info
*info
)
1840 struct remote_state
*rs
= get_remote_state ();
1843 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
1845 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1847 if (rs
->buf
[0] == '\0')
1850 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
1855 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1858 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
1859 threadref
*nextthread
)
1861 *pkt
++ = 'q'; /* info query packet */
1862 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
1863 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
1864 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
1865 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
1870 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1873 parse_threadlist_response (char *pkt
, int result_limit
,
1874 threadref
*original_echo
, threadref
*resultlist
,
1877 struct remote_state
*rs
= get_remote_state ();
1879 int count
, resultcount
, done
;
1882 /* Assume the 'q' and 'M chars have been stripped. */
1883 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
1884 /* done parse past here */
1885 pkt
= unpack_byte (pkt
, &count
); /* count field */
1886 pkt
= unpack_nibble (pkt
, &done
);
1887 /* The first threadid is the argument threadid. */
1888 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
1889 while ((count
-- > 0) && (pkt
< limit
))
1891 pkt
= unpack_threadid (pkt
, resultlist
++);
1892 if (resultcount
++ >= result_limit
)
1901 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
1902 int *done
, int *result_count
, threadref
*threadlist
)
1904 struct remote_state
*rs
= get_remote_state ();
1905 static threadref echo_nextthread
;
1908 /* Trancate result limit to be smaller than the packet size. */
1909 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10) >= get_remote_packet_size ())
1910 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
1912 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
1914 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1916 if (*rs
->buf
== '\0')
1920 parse_threadlist_response (rs
->buf
+ 2, result_limit
, &echo_nextthread
,
1923 if (!threadmatch (&echo_nextthread
, nextthread
))
1925 /* FIXME: This is a good reason to drop the packet. */
1926 /* Possably, there is a duplicate response. */
1928 retransmit immediatly - race conditions
1929 retransmit after timeout - yes
1931 wait for packet, then exit
1933 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
1934 return 0; /* I choose simply exiting. */
1936 if (*result_count
<= 0)
1940 warning (_("RMT ERROR : failed to get remote thread list."));
1943 return result
; /* break; */
1945 if (*result_count
> result_limit
)
1948 warning (_("RMT ERROR: threadlist response longer than requested."));
1954 /* This is the interface between remote and threads, remotes upper
1957 /* remote_find_new_threads retrieves the thread list and for each
1958 thread in the list, looks up the thread in GDB's internal list,
1959 adding the thread if it does not already exist. This involves
1960 getting partial thread lists from the remote target so, polling the
1961 quit_flag is required. */
1964 /* About this many threadisds fit in a packet. */
1966 #define MAXTHREADLISTRESULTS 32
1969 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
1972 int done
, i
, result_count
;
1976 static threadref nextthread
;
1977 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
1982 if (loopcount
++ > looplimit
)
1985 warning (_("Remote fetch threadlist -infinite loop-."));
1988 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
1989 &done
, &result_count
, resultthreadlist
))
1994 /* Clear for later iterations. */
1996 /* Setup to resume next batch of thread references, set nextthread. */
1997 if (result_count
>= 1)
1998 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
2000 while (result_count
--)
2001 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
2008 remote_newthread_step (threadref
*ref
, void *context
)
2010 int pid
= ptid_get_pid (inferior_ptid
);
2011 ptid_t ptid
= ptid_build (pid
, 0, threadref_to_int (ref
));
2013 if (!in_thread_list (ptid
))
2015 return 1; /* continue iterator */
2018 #define CRAZY_MAX_THREADS 1000
2021 remote_current_thread (ptid_t oldpid
)
2023 struct remote_state
*rs
= get_remote_state ();
2029 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2030 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
2031 return read_ptid (&rs
->buf
[2], NULL
);
2036 /* Find new threads for info threads command.
2037 * Original version, using John Metzler's thread protocol.
2041 remote_find_new_threads (void)
2043 remote_threadlist_iterator (remote_newthread_step
, 0,
2048 * Find all threads for info threads command.
2049 * Uses new thread protocol contributed by Cisco.
2050 * Falls back and attempts to use the older method (above)
2051 * if the target doesn't respond to the new method.
2055 remote_threads_info (void)
2057 struct remote_state
*rs
= get_remote_state ();
2061 if (remote_desc
== 0) /* paranoia */
2062 error (_("Command can only be used when connected to the remote target."));
2064 if (use_threadinfo_query
)
2066 putpkt ("qfThreadInfo");
2067 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2069 if (bufp
[0] != '\0') /* q packet recognized */
2071 while (*bufp
++ == 'm') /* reply contains one or more TID */
2075 new_thread
= read_ptid (bufp
, &bufp
);
2076 if (!ptid_equal (new_thread
, null_ptid
)
2077 && !in_thread_list (new_thread
))
2079 if (!in_inferior_list (ptid_get_pid (new_thread
)))
2080 /* When connected to a multi-process aware
2081 stub, "info threads" may show up threads of
2082 inferiors we didn't know about yet. Add
2084 add_inferior (ptid_get_pid (new_thread
));
2086 add_thread (new_thread
);
2089 while (*bufp
++ == ','); /* comma-separated list */
2090 putpkt ("qsThreadInfo");
2091 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2098 /* Else fall back to old method based on jmetzler protocol. */
2099 use_threadinfo_query
= 0;
2100 remote_find_new_threads ();
2105 * Collect a descriptive string about the given thread.
2106 * The target may say anything it wants to about the thread
2107 * (typically info about its blocked / runnable state, name, etc.).
2108 * This string will appear in the info threads display.
2110 * Optional: targets are not required to implement this function.
2114 remote_threads_extra_info (struct thread_info
*tp
)
2116 struct remote_state
*rs
= get_remote_state ();
2120 struct gdb_ext_thread_info threadinfo
;
2121 static char display_buf
[100]; /* arbitrary... */
2122 int n
= 0; /* position in display_buf */
2124 if (remote_desc
== 0) /* paranoia */
2125 internal_error (__FILE__
, __LINE__
,
2126 _("remote_threads_extra_info"));
2128 if (ptid_equal (tp
->ptid
, magic_null_ptid
)
2129 || (ptid_get_pid (tp
->ptid
) != 0 && ptid_get_tid (tp
->ptid
) == 0))
2130 /* This is the main thread which was added by GDB. The remote
2131 server doesn't know about it. */
2134 if (use_threadextra_query
)
2137 char *endb
= rs
->buf
+ get_remote_packet_size ();
2139 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
2141 write_ptid (b
, endb
, tp
->ptid
);
2144 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2145 if (rs
->buf
[0] != 0)
2147 n
= min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
2148 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
2149 display_buf
[result
] = '\0';
2154 /* If the above query fails, fall back to the old method. */
2155 use_threadextra_query
= 0;
2156 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
2157 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
2158 int_to_threadref (&id
, ptid_get_tid (tp
->ptid
));
2159 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
2160 if (threadinfo
.active
)
2162 if (*threadinfo
.shortname
)
2163 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
2164 " Name: %s,", threadinfo
.shortname
);
2165 if (*threadinfo
.display
)
2166 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2167 " State: %s,", threadinfo
.display
);
2168 if (*threadinfo
.more_display
)
2169 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2170 " Priority: %s", threadinfo
.more_display
);
2174 /* For purely cosmetic reasons, clear up trailing commas. */
2175 if (',' == display_buf
[n
-1])
2176 display_buf
[n
-1] = ' ';
2184 /* Restart the remote side; this is an extended protocol operation. */
2187 extended_remote_restart (void)
2189 struct remote_state
*rs
= get_remote_state ();
2191 /* Send the restart command; for reasons I don't understand the
2192 remote side really expects a number after the "R". */
2193 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
2196 remote_fileio_reset ();
2199 /* Clean up connection to a remote debugger. */
2202 remote_close (int quitting
)
2205 serial_close (remote_desc
);
2209 /* Query the remote side for the text, data and bss offsets. */
2214 struct remote_state
*rs
= get_remote_state ();
2217 int lose
, num_segments
= 0, do_sections
, do_segments
;
2218 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
2219 struct section_offsets
*offs
;
2220 struct symfile_segment_data
*data
;
2222 if (symfile_objfile
== NULL
)
2225 putpkt ("qOffsets");
2226 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2229 if (buf
[0] == '\000')
2230 return; /* Return silently. Stub doesn't support
2234 warning (_("Remote failure reply: %s"), buf
);
2238 /* Pick up each field in turn. This used to be done with scanf, but
2239 scanf will make trouble if CORE_ADDR size doesn't match
2240 conversion directives correctly. The following code will work
2241 with any size of CORE_ADDR. */
2242 text_addr
= data_addr
= bss_addr
= 0;
2246 if (strncmp (ptr
, "Text=", 5) == 0)
2249 /* Don't use strtol, could lose on big values. */
2250 while (*ptr
&& *ptr
!= ';')
2251 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2253 if (strncmp (ptr
, ";Data=", 6) == 0)
2256 while (*ptr
&& *ptr
!= ';')
2257 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2262 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
2265 while (*ptr
&& *ptr
!= ';')
2266 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
2268 if (bss_addr
!= data_addr
)
2269 warning (_("Target reported unsupported offsets: %s"), buf
);
2274 else if (strncmp (ptr
, "TextSeg=", 8) == 0)
2277 /* Don't use strtol, could lose on big values. */
2278 while (*ptr
&& *ptr
!= ';')
2279 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2282 if (strncmp (ptr
, ";DataSeg=", 9) == 0)
2285 while (*ptr
&& *ptr
!= ';')
2286 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2294 error (_("Malformed response to offset query, %s"), buf
);
2295 else if (*ptr
!= '\0')
2296 warning (_("Target reported unsupported offsets: %s"), buf
);
2298 offs
= ((struct section_offsets
*)
2299 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
2300 memcpy (offs
, symfile_objfile
->section_offsets
,
2301 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
2303 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
2304 do_segments
= (data
!= NULL
);
2305 do_sections
= num_segments
== 0;
2307 if (num_segments
> 0)
2309 segments
[0] = text_addr
;
2310 segments
[1] = data_addr
;
2312 /* If we have two segments, we can still try to relocate everything
2313 by assuming that the .text and .data offsets apply to the whole
2314 text and data segments. Convert the offsets given in the packet
2315 to base addresses for symfile_map_offsets_to_segments. */
2316 else if (data
&& data
->num_segments
== 2)
2318 segments
[0] = data
->segment_bases
[0] + text_addr
;
2319 segments
[1] = data
->segment_bases
[1] + data_addr
;
2322 /* If the object file has only one segment, assume that it is text
2323 rather than data; main programs with no writable data are rare,
2324 but programs with no code are useless. Of course the code might
2325 have ended up in the data segment... to detect that we would need
2326 the permissions here. */
2327 else if (data
&& data
->num_segments
== 1)
2329 segments
[0] = data
->segment_bases
[0] + text_addr
;
2332 /* There's no way to relocate by segment. */
2338 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
2339 offs
, num_segments
, segments
);
2341 if (ret
== 0 && !do_sections
)
2342 error (_("Can not handle qOffsets TextSeg response with this symbol file"));
2349 free_symfile_segment_data (data
);
2353 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
2355 /* This is a temporary kludge to force data and bss to use the same offsets
2356 because that's what nlmconv does now. The real solution requires changes
2357 to the stub and remote.c that I don't have time to do right now. */
2359 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
2360 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
2363 objfile_relocate (symfile_objfile
, offs
);
2366 /* Stub for catch_exception. */
2368 struct start_remote_args
2372 /* The current target. */
2373 struct target_ops
*target
;
2375 /* Non-zero if this is an extended-remote target. */
2380 remote_start_remote (struct ui_out
*uiout
, void *opaque
)
2382 struct start_remote_args
*args
= opaque
;
2383 struct remote_state
*rs
= get_remote_state ();
2384 struct packet_config
*noack_config
;
2385 char *wait_status
= NULL
;
2387 immediate_quit
++; /* Allow user to interrupt it. */
2389 /* Ack any packet which the remote side has already sent. */
2390 serial_write (remote_desc
, "+", 1);
2392 /* The first packet we send to the target is the optional "supported
2393 packets" request. If the target can answer this, it will tell us
2394 which later probes to skip. */
2395 remote_query_supported ();
2397 /* Next, we possibly activate noack mode.
2399 If the QStartNoAckMode packet configuration is set to AUTO,
2400 enable noack mode if the stub reported a wish for it with
2403 If set to TRUE, then enable noack mode even if the stub didn't
2404 report it in qSupported. If the stub doesn't reply OK, the
2405 session ends with an error.
2407 If FALSE, then don't activate noack mode, regardless of what the
2408 stub claimed should be the default with qSupported. */
2410 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
2412 if (noack_config
->detect
== AUTO_BOOLEAN_TRUE
2413 || (noack_config
->detect
== AUTO_BOOLEAN_AUTO
2414 && noack_config
->support
== PACKET_ENABLE
))
2416 putpkt ("QStartNoAckMode");
2417 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2418 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
2422 if (args
->extended_p
)
2424 /* Tell the remote that we are using the extended protocol. */
2426 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2429 /* Next, if the target can specify a description, read it. We do
2430 this before anything involving memory or registers. */
2431 target_find_description ();
2433 /* Check whether the target is running now. */
2435 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2437 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
2439 if (args
->extended_p
)
2441 /* We're connected, but not running. Drop out before we
2442 call start_remote. */
2443 target_mark_exited (args
->target
);
2447 error (_("The target is not running (try extended-remote?)"));
2451 if (args
->extended_p
)
2452 target_mark_running (args
->target
);
2454 /* Save the reply for later. */
2455 wait_status
= alloca (strlen (rs
->buf
) + 1);
2456 strcpy (wait_status
, rs
->buf
);
2460 init_thread_list ();
2462 /* Let the stub know that we want it to return the thread. */
2463 set_continue_thread (minus_one_ptid
);
2465 /* Without this, some commands which require an active target
2466 (such as kill) won't work. This variable serves (at least)
2467 double duty as both the pid of the target process (if it has
2468 such), and as a flag indicating that a target is active.
2469 These functions should be split out into seperate variables,
2470 especially since GDB will someday have a notion of debugging
2471 several processes. */
2472 inferior_ptid
= magic_null_ptid
;
2474 /* Now, if we have thread information, update inferior_ptid. */
2475 inferior_ptid
= remote_current_thread (inferior_ptid
);
2477 add_inferior (ptid_get_pid (inferior_ptid
));
2479 /* Always add the main thread. */
2480 add_thread_silent (inferior_ptid
);
2482 get_offsets (); /* Get text, data & bss offsets. */
2484 /* Use the previously fetched status. */
2485 gdb_assert (wait_status
!= NULL
);
2486 strcpy (rs
->buf
, wait_status
);
2487 rs
->cached_wait_status
= 1;
2490 start_remote (args
->from_tty
); /* Initialize gdb process mechanisms. */
2492 /* If we connected to a live target, do some additional setup. */
2493 if (target_has_execution
)
2495 if (exec_bfd
) /* No use without an exec file. */
2496 remote_check_symbols (symfile_objfile
);
2500 /* Open a connection to a remote debugger.
2501 NAME is the filename used for communication. */
2504 remote_open (char *name
, int from_tty
)
2506 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
2509 /* Open a connection to a remote debugger using the extended
2510 remote gdb protocol. NAME is the filename used for communication. */
2513 extended_remote_open (char *name
, int from_tty
)
2515 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
2518 /* Generic code for opening a connection to a remote target. */
2521 init_all_packet_configs (void)
2524 for (i
= 0; i
< PACKET_MAX
; i
++)
2525 update_packet_config (&remote_protocol_packets
[i
]);
2528 /* Symbol look-up. */
2531 remote_check_symbols (struct objfile
*objfile
)
2533 struct remote_state
*rs
= get_remote_state ();
2534 char *msg
, *reply
, *tmp
;
2535 struct minimal_symbol
*sym
;
2538 if (remote_protocol_packets
[PACKET_qSymbol
].support
== PACKET_DISABLE
)
2541 /* Allocate a message buffer. We can't reuse the input buffer in RS,
2542 because we need both at the same time. */
2543 msg
= alloca (get_remote_packet_size ());
2545 /* Invite target to request symbol lookups. */
2547 putpkt ("qSymbol::");
2548 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2549 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSymbol
]);
2552 while (strncmp (reply
, "qSymbol:", 8) == 0)
2555 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
2557 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
2559 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
2562 CORE_ADDR sym_addr
= SYMBOL_VALUE_ADDRESS (sym
);
2564 /* If this is a function address, return the start of code
2565 instead of any data function descriptor. */
2566 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch
,
2570 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
2571 paddr_nz (sym_addr
), &reply
[8]);
2575 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2580 static struct serial
*
2581 remote_serial_open (char *name
)
2583 static int udp_warning
= 0;
2585 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2586 of in ser-tcp.c, because it is the remote protocol assuming that the
2587 serial connection is reliable and not the serial connection promising
2589 if (!udp_warning
&& strncmp (name
, "udp:", 4) == 0)
2592 The remote protocol may be unreliable over UDP.\n\
2593 Some events may be lost, rendering further debugging impossible."));
2597 return serial_open (name
);
2600 /* This type describes each known response to the qSupported
2602 struct protocol_feature
2604 /* The name of this protocol feature. */
2607 /* The default for this protocol feature. */
2608 enum packet_support default_support
;
2610 /* The function to call when this feature is reported, or after
2611 qSupported processing if the feature is not supported.
2612 The first argument points to this structure. The second
2613 argument indicates whether the packet requested support be
2614 enabled, disabled, or probed (or the default, if this function
2615 is being called at the end of processing and this feature was
2616 not reported). The third argument may be NULL; if not NULL, it
2617 is a NUL-terminated string taken from the packet following
2618 this feature's name and an equals sign. */
2619 void (*func
) (const struct protocol_feature
*, enum packet_support
,
2622 /* The corresponding packet for this feature. Only used if
2623 FUNC is remote_supported_packet. */
2628 remote_supported_packet (const struct protocol_feature
*feature
,
2629 enum packet_support support
,
2630 const char *argument
)
2634 warning (_("Remote qSupported response supplied an unexpected value for"
2635 " \"%s\"."), feature
->name
);
2639 if (remote_protocol_packets
[feature
->packet
].support
2640 == PACKET_SUPPORT_UNKNOWN
)
2641 remote_protocol_packets
[feature
->packet
].support
= support
;
2645 remote_packet_size (const struct protocol_feature
*feature
,
2646 enum packet_support support
, const char *value
)
2648 struct remote_state
*rs
= get_remote_state ();
2653 if (support
!= PACKET_ENABLE
)
2656 if (value
== NULL
|| *value
== '\0')
2658 warning (_("Remote target reported \"%s\" without a size."),
2664 packet_size
= strtol (value
, &value_end
, 16);
2665 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
2667 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
2668 feature
->name
, value
);
2672 if (packet_size
> MAX_REMOTE_PACKET_SIZE
)
2674 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
2675 packet_size
, MAX_REMOTE_PACKET_SIZE
);
2676 packet_size
= MAX_REMOTE_PACKET_SIZE
;
2679 /* Record the new maximum packet size. */
2680 rs
->explicit_packet_size
= packet_size
;
2684 remote_multi_process_feature (const struct protocol_feature
*feature
,
2685 enum packet_support support
, const char *value
)
2687 struct remote_state
*rs
= get_remote_state ();
2688 rs
->multi_process_aware
= (support
== PACKET_ENABLE
);
2691 static struct protocol_feature remote_protocol_features
[] = {
2692 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
2693 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
2694 PACKET_qXfer_auxv
},
2695 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
2696 PACKET_qXfer_features
},
2697 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
2698 PACKET_qXfer_libraries
},
2699 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
2700 PACKET_qXfer_memory_map
},
2701 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
2702 PACKET_qXfer_spu_read
},
2703 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
2704 PACKET_qXfer_spu_write
},
2705 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
2706 PACKET_QPassSignals
},
2707 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
2708 PACKET_QStartNoAckMode
},
2709 { "multiprocess", PACKET_DISABLE
, remote_multi_process_feature
, -1 },
2713 remote_query_supported (void)
2715 struct remote_state
*rs
= get_remote_state ();
2718 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
2720 /* The packet support flags are handled differently for this packet
2721 than for most others. We treat an error, a disabled packet, and
2722 an empty response identically: any features which must be reported
2723 to be used will be automatically disabled. An empty buffer
2724 accomplishes this, since that is also the representation for a list
2725 containing no features. */
2728 if (remote_protocol_packets
[PACKET_qSupported
].support
!= PACKET_DISABLE
)
2731 putpkt ("qSupported:multiprocess+");
2733 putpkt ("qSupported");
2735 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2737 /* If an error occured, warn, but do not return - just reset the
2738 buffer to empty and go on to disable features. */
2739 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
2742 warning (_("Remote failure reply: %s"), rs
->buf
);
2747 memset (seen
, 0, sizeof (seen
));
2752 enum packet_support is_supported
;
2753 char *p
, *end
, *name_end
, *value
;
2755 /* First separate out this item from the rest of the packet. If
2756 there's another item after this, we overwrite the separator
2757 (terminated strings are much easier to work with). */
2759 end
= strchr (p
, ';');
2762 end
= p
+ strlen (p
);
2772 warning (_("empty item in \"qSupported\" response"));
2777 name_end
= strchr (p
, '=');
2780 /* This is a name=value entry. */
2781 is_supported
= PACKET_ENABLE
;
2782 value
= name_end
+ 1;
2791 is_supported
= PACKET_ENABLE
;
2795 is_supported
= PACKET_DISABLE
;
2799 is_supported
= PACKET_SUPPORT_UNKNOWN
;
2803 warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p
);
2809 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
2810 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
2812 const struct protocol_feature
*feature
;
2815 feature
= &remote_protocol_features
[i
];
2816 feature
->func (feature
, is_supported
, value
);
2821 /* If we increased the packet size, make sure to increase the global
2822 buffer size also. We delay this until after parsing the entire
2823 qSupported packet, because this is the same buffer we were
2825 if (rs
->buf_size
< rs
->explicit_packet_size
)
2827 rs
->buf_size
= rs
->explicit_packet_size
;
2828 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
2831 /* Handle the defaults for unmentioned features. */
2832 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
2835 const struct protocol_feature
*feature
;
2837 feature
= &remote_protocol_features
[i
];
2838 feature
->func (feature
, feature
->default_support
, NULL
);
2844 remote_open_1 (char *name
, int from_tty
, struct target_ops
*target
, int extended_p
)
2846 struct remote_state
*rs
= get_remote_state ();
2849 error (_("To open a remote debug connection, you need to specify what\n"
2850 "serial device is attached to the remote system\n"
2851 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
2853 /* See FIXME above. */
2854 if (!target_async_permitted
)
2855 wait_forever_enabled_p
= 1;
2857 /* If we're connected to a running target, target_preopen will kill it.
2858 But if we're connected to a target system with no running process,
2859 then we will still be connected when it returns. Ask this question
2860 first, before target_preopen has a chance to kill anything. */
2861 if (remote_desc
!= NULL
&& !target_has_execution
)
2864 || query (_("Already connected to a remote target. Disconnect? ")))
2867 error (_("Still connected."));
2870 target_preopen (from_tty
);
2872 unpush_target (target
);
2874 /* This time without a query. If we were connected to an
2875 extended-remote target and target_preopen killed the running
2876 process, we may still be connected. If we are starting "target
2877 remote" now, the extended-remote target will not have been
2878 removed by unpush_target. */
2879 if (remote_desc
!= NULL
&& !target_has_execution
)
2882 /* Make sure we send the passed signals list the next time we resume. */
2883 xfree (last_pass_packet
);
2884 last_pass_packet
= NULL
;
2886 remote_fileio_reset ();
2887 reopen_exec_file ();
2890 remote_desc
= remote_serial_open (name
);
2892 perror_with_name (name
);
2894 if (baud_rate
!= -1)
2896 if (serial_setbaudrate (remote_desc
, baud_rate
))
2898 /* The requested speed could not be set. Error out to
2899 top level after closing remote_desc. Take care to
2900 set remote_desc to NULL to avoid closing remote_desc
2902 serial_close (remote_desc
);
2904 perror_with_name (name
);
2908 serial_raw (remote_desc
);
2910 /* If there is something sitting in the buffer we might take it as a
2911 response to a command, which would be bad. */
2912 serial_flush_input (remote_desc
);
2916 puts_filtered ("Remote debugging using ");
2917 puts_filtered (name
);
2918 puts_filtered ("\n");
2920 push_target (target
); /* Switch to using remote target now. */
2922 /* Assume that the target is running, unless we learn otherwise. */
2923 target_mark_running (target
);
2925 /* Reset the target state; these things will be queried either by
2926 remote_query_supported or as they are needed. */
2927 init_all_packet_configs ();
2928 rs
->explicit_packet_size
= 0;
2930 rs
->multi_process_aware
= 0;
2931 rs
->extended
= extended_p
;
2932 rs
->waiting_for_stop_reply
= 0;
2934 general_thread
= not_sent_ptid
;
2935 continue_thread
= not_sent_ptid
;
2937 /* Probe for ability to use "ThreadInfo" query, as required. */
2938 use_threadinfo_query
= 1;
2939 use_threadextra_query
= 1;
2941 if (target_async_permitted
)
2943 /* With this target we start out by owning the terminal. */
2944 remote_async_terminal_ours_p
= 1;
2946 /* FIXME: cagney/1999-09-23: During the initial connection it is
2947 assumed that the target is already ready and able to respond to
2948 requests. Unfortunately remote_start_remote() eventually calls
2949 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2950 around this. Eventually a mechanism that allows
2951 wait_for_inferior() to expect/get timeouts will be
2953 wait_forever_enabled_p
= 0;
2956 /* First delete any symbols previously loaded from shared libraries. */
2957 no_shared_libraries (NULL
, 0);
2959 /* Start the remote connection. If error() or QUIT, discard this
2960 target (we'd otherwise be in an inconsistent state) and then
2961 propogate the error on up the exception chain. This ensures that
2962 the caller doesn't stumble along blindly assuming that the
2963 function succeeded. The CLI doesn't have this problem but other
2964 UI's, such as MI do.
2966 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
2967 this function should return an error indication letting the
2968 caller restore the previous state. Unfortunately the command
2969 ``target remote'' is directly wired to this function making that
2970 impossible. On a positive note, the CLI side of this problem has
2971 been fixed - the function set_cmd_context() makes it possible for
2972 all the ``target ....'' commands to share a common callback
2973 function. See cli-dump.c. */
2975 struct gdb_exception ex
;
2976 struct start_remote_args args
;
2978 args
.from_tty
= from_tty
;
2979 args
.target
= target
;
2980 args
.extended_p
= extended_p
;
2982 ex
= catch_exception (uiout
, remote_start_remote
, &args
, RETURN_MASK_ALL
);
2985 /* Pop the partially set up target - unless something else did
2986 already before throwing the exception. */
2987 if (remote_desc
!= NULL
)
2989 if (target_async_permitted
)
2990 wait_forever_enabled_p
= 1;
2991 throw_exception (ex
);
2995 if (target_async_permitted
)
2996 wait_forever_enabled_p
= 1;
2999 /* This takes a program previously attached to and detaches it. After
3000 this is done, GDB can be used to debug some other program. We
3001 better not have left any breakpoints in the target program or it'll
3002 die when it hits one. */
3005 remote_detach_1 (char *args
, int from_tty
, int extended
)
3007 int pid
= ptid_get_pid (inferior_ptid
);
3008 struct remote_state
*rs
= get_remote_state ();
3011 error (_("Argument given to \"detach\" when remotely debugging."));
3013 if (!target_has_execution
)
3014 error (_("No process to detach from."));
3016 /* Tell the remote target to detach. */
3017 if (remote_multi_process_p (rs
))
3018 sprintf (rs
->buf
, "D;%x", pid
);
3020 strcpy (rs
->buf
, "D");
3023 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3025 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
3027 else if (rs
->buf
[0] == '\0')
3028 error (_("Remote doesn't know how to detach"));
3030 error (_("Can't detach process."));
3032 /* Unregister the file descriptor from the event loop. */
3033 if (target_is_async_p ())
3034 serial_async (remote_desc
, NULL
, 0);
3038 if (remote_multi_process_p (rs
))
3039 printf_filtered (_("Detached from remote %s.\n"),
3040 target_pid_to_str (pid_to_ptid (pid
)));
3044 puts_filtered (_("Detached from remote process.\n"));
3046 puts_filtered (_("Ending remote debugging.\n"));
3050 detach_inferior (pid
);
3051 target_mourn_inferior ();
3055 remote_detach (char *args
, int from_tty
)
3057 remote_detach_1 (args
, from_tty
, 0);
3061 extended_remote_detach (char *args
, int from_tty
)
3063 remote_detach_1 (args
, from_tty
, 1);
3066 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
3069 remote_disconnect (struct target_ops
*target
, char *args
, int from_tty
)
3072 error (_("Argument given to \"disconnect\" when remotely debugging."));
3074 /* Unregister the file descriptor from the event loop. */
3075 if (target_is_async_p ())
3076 serial_async (remote_desc
, NULL
, 0);
3078 /* Make sure we unpush even the extended remote targets; mourn
3079 won't do it. So call remote_mourn_1 directly instead of
3080 target_mourn_inferior. */
3081 remote_mourn_1 (target
);
3084 puts_filtered ("Ending remote debugging.\n");
3087 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
3088 be chatty about it. */
3091 extended_remote_attach_1 (struct target_ops
*target
, char *args
, int from_tty
)
3093 struct remote_state
*rs
= get_remote_state ();
3096 char *wait_status
= NULL
;
3097 struct inferior
*inf
;
3100 error_no_arg (_("process-id to attach"));
3103 pid
= strtol (args
, &dummy
, 0);
3104 /* Some targets don't set errno on errors, grrr! */
3105 if (pid
== 0 && args
== dummy
)
3106 error (_("Illegal process-id: %s."), args
);
3108 if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
3109 error (_("This target does not support attaching to a process"));
3111 sprintf (rs
->buf
, "vAttach;%x", pid
);
3113 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3115 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vAttach
]) == PACKET_OK
)
3118 printf_unfiltered (_("Attached to %s\n"),
3119 target_pid_to_str (pid_to_ptid (pid
)));
3121 /* Save the reply for later. */
3122 wait_status
= alloca (strlen (rs
->buf
) + 1);
3123 strcpy (wait_status
, rs
->buf
);
3125 else if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
3126 error (_("This target does not support attaching to a process"));
3128 error (_("Attaching to %s failed"),
3129 target_pid_to_str (pid_to_ptid (pid
)));
3131 target_mark_running (target
);
3132 inferior_ptid
= pid_to_ptid (pid
);
3134 /* Now, if we have thread information, update inferior_ptid. */
3135 inferior_ptid
= remote_current_thread (inferior_ptid
);
3137 inf
= add_inferior (pid
);
3138 inf
->attach_flag
= 1;
3140 /* Now, add the main thread to the thread list. */
3141 add_thread_silent (inferior_ptid
);
3143 /* Next, if the target can specify a description, read it. We do
3144 this before anything involving memory or registers. */
3145 target_find_description ();
3147 /* Use the previously fetched status. */
3148 gdb_assert (wait_status
!= NULL
);
3149 strcpy (rs
->buf
, wait_status
);
3150 rs
->cached_wait_status
= 1;
3154 extended_remote_attach (char *args
, int from_tty
)
3156 extended_remote_attach_1 (&extended_remote_ops
, args
, from_tty
);
3159 /* Convert hex digit A to a number. */
3164 if (a
>= '0' && a
<= '9')
3166 else if (a
>= 'a' && a
<= 'f')
3167 return a
- 'a' + 10;
3168 else if (a
>= 'A' && a
<= 'F')
3169 return a
- 'A' + 10;
3171 error (_("Reply contains invalid hex digit %d"), a
);
3175 hex2bin (const char *hex
, gdb_byte
*bin
, int count
)
3179 for (i
= 0; i
< count
; i
++)
3181 if (hex
[0] == 0 || hex
[1] == 0)
3183 /* Hex string is short, or of uneven length.
3184 Return the count that has been converted so far. */
3187 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
3193 /* Convert number NIB to a hex digit. */
3201 return 'a' + nib
- 10;
3205 bin2hex (const gdb_byte
*bin
, char *hex
, int count
)
3208 /* May use a length, or a nul-terminated string as input. */
3210 count
= strlen ((char *) bin
);
3212 for (i
= 0; i
< count
; i
++)
3214 *hex
++ = tohex ((*bin
>> 4) & 0xf);
3215 *hex
++ = tohex (*bin
++ & 0xf);
3221 /* Check for the availability of vCont. This function should also check
3225 remote_vcont_probe (struct remote_state
*rs
)
3229 strcpy (rs
->buf
, "vCont?");
3231 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3234 /* Make sure that the features we assume are supported. */
3235 if (strncmp (buf
, "vCont", 5) == 0)
3238 int support_s
, support_S
, support_c
, support_C
;
3244 while (p
&& *p
== ';')
3247 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3249 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3251 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3253 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3256 p
= strchr (p
, ';');
3259 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
3260 BUF will make packet_ok disable the packet. */
3261 if (!support_s
|| !support_S
|| !support_c
|| !support_C
)
3265 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
3268 /* Resume the remote inferior by using a "vCont" packet. The thread
3269 to be resumed is PTID; STEP and SIGGNAL indicate whether the
3270 resumed thread should be single-stepped and/or signalled. If PTID
3271 equals minus_one_ptid, then all threads are resumed; the thread to
3272 be stepped and/or signalled is given in the global INFERIOR_PTID.
3273 This function returns non-zero iff it resumes the inferior.
3275 This function issues a strict subset of all possible vCont commands at the
3279 remote_vcont_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
3281 struct remote_state
*rs
= get_remote_state ();
3285 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
3286 remote_vcont_probe (rs
);
3288 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_DISABLE
)
3292 endp
= rs
->buf
+ get_remote_packet_size ();
3294 /* If we could generate a wider range of packets, we'd have to worry
3295 about overflowing BUF. Should there be a generic
3296 "multi-part-packet" packet? */
3298 if (ptid_equal (ptid
, magic_null_ptid
))
3300 /* MAGIC_NULL_PTID means that we don't have any active threads,
3301 so we don't have any TID numbers the inferior will
3302 understand. Make sure to only send forms that do not specify
3304 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
3305 xsnprintf (p
, endp
- p
, "vCont;S%02x", siggnal
);
3307 xsnprintf (p
, endp
- p
, "vCont;s");
3308 else if (siggnal
!= TARGET_SIGNAL_0
)
3309 xsnprintf (p
, endp
- p
, "vCont;C%02x", siggnal
);
3311 xsnprintf (p
, endp
- p
, "vCont;c");
3313 else if (ptid_equal (ptid
, minus_one_ptid
))
3315 /* Resume all threads, with preference for INFERIOR_PTID. */
3316 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
3318 /* Step inferior_ptid with signal. */
3319 p
+= xsnprintf (p
, endp
- p
, "vCont;S%02x:", siggnal
);
3320 p
= write_ptid (p
, endp
, inferior_ptid
);
3321 /* And continue others. */
3322 p
+= xsnprintf (p
, endp
- p
, ";c");
3326 /* Step inferior_ptid. */
3327 p
+= xsnprintf (p
, endp
- p
, "vCont;s:");
3328 p
= write_ptid (p
, endp
, inferior_ptid
);
3329 /* And continue others. */
3330 p
+= xsnprintf (p
, endp
- p
, ";c");
3332 else if (siggnal
!= TARGET_SIGNAL_0
)
3334 /* Continue inferior_ptid with signal. */
3335 p
+= xsnprintf (p
, endp
- p
, "vCont;C%02x:", siggnal
);
3336 p
= write_ptid (p
, endp
, inferior_ptid
);
3337 /* And continue others. */
3338 p
+= xsnprintf (p
, endp
- p
, ";c");
3341 xsnprintf (p
, endp
- p
, "vCont;c");
3345 /* Scheduler locking; resume only PTID. */
3346 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
3348 /* Step ptid with signal. */
3349 p
+= xsnprintf (p
, endp
- p
, "vCont;S%02x:", siggnal
);
3350 p
= write_ptid (p
, endp
, ptid
);
3355 p
+= xsnprintf (p
, endp
- p
, "vCont;s:");
3356 p
= write_ptid (p
, endp
, ptid
);
3358 else if (siggnal
!= TARGET_SIGNAL_0
)
3360 /* Continue ptid with signal. */
3361 p
+= xsnprintf (p
, endp
- p
, "vCont;C%02x:", siggnal
);
3362 p
= write_ptid (p
, endp
, ptid
);
3366 /* Continue ptid. */
3367 p
+= xsnprintf (p
, endp
- p
, "vCont;c:");
3368 p
= write_ptid (p
, endp
, ptid
);
3372 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
3378 /* Tell the remote machine to resume. */
3380 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
3382 static int last_sent_step
;
3385 remote_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
3387 struct remote_state
*rs
= get_remote_state ();
3390 last_sent_signal
= siggnal
;
3391 last_sent_step
= step
;
3393 /* Update the inferior on signals to silently pass, if they've changed. */
3394 remote_pass_signals ();
3396 /* The vCont packet doesn't need to specify threads via Hc. */
3397 if (remote_vcont_resume (ptid
, step
, siggnal
))
3400 /* All other supported resume packets do use Hc, so set the continue
3402 if (ptid_equal (ptid
, minus_one_ptid
))
3403 set_continue_thread (any_thread_ptid
);
3405 set_continue_thread (ptid
);
3408 if (siggnal
!= TARGET_SIGNAL_0
)
3410 buf
[0] = step
? 'S' : 'C';
3411 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
3412 buf
[2] = tohex (((int) siggnal
) & 0xf);
3416 strcpy (buf
, step
? "s" : "c");
3421 /* We are about to start executing the inferior, let's register it
3422 with the event loop. NOTE: this is the one place where all the
3423 execution commands end up. We could alternatively do this in each
3424 of the execution commands in infcmd.c. */
3425 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
3426 into infcmd.c in order to allow inferior function calls to work
3427 NOT asynchronously. */
3428 if (target_can_async_p ())
3429 target_async (inferior_event_handler
, 0);
3431 /* We've just told the target to resume. The remote server will
3432 wait for the inferior to stop, and then send a stop reply. In
3433 the mean time, we can't start another command/query ourselves
3434 because the stub wouldn't be ready to process it. */
3435 rs
->waiting_for_stop_reply
= 1;
3439 /* Set up the signal handler for SIGINT, while the target is
3440 executing, ovewriting the 'regular' SIGINT signal handler. */
3442 initialize_sigint_signal_handler (void)
3444 signal (SIGINT
, handle_remote_sigint
);
3447 /* Signal handler for SIGINT, while the target is executing. */
3449 handle_remote_sigint (int sig
)
3451 signal (sig
, handle_remote_sigint_twice
);
3452 mark_async_signal_handler_wrapper (sigint_remote_token
);
3455 /* Signal handler for SIGINT, installed after SIGINT has already been
3456 sent once. It will take effect the second time that the user sends
3459 handle_remote_sigint_twice (int sig
)
3461 signal (sig
, handle_remote_sigint
);
3462 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
3465 /* Perform the real interruption of the target execution, in response
3468 async_remote_interrupt (gdb_client_data arg
)
3471 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
3473 target_stop (inferior_ptid
);
3476 /* Perform interrupt, if the first attempt did not succeed. Just give
3477 up on the target alltogether. */
3479 async_remote_interrupt_twice (gdb_client_data arg
)
3482 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
3487 /* Reinstall the usual SIGINT handlers, after the target has
3490 cleanup_sigint_signal_handler (void *dummy
)
3492 signal (SIGINT
, handle_sigint
);
3495 /* Send ^C to target to halt it. Target will respond, and send us a
3497 static void (*ofunc
) (int);
3499 /* The command line interface's stop routine. This function is installed
3500 as a signal handler for SIGINT. The first time a user requests a
3501 stop, we call remote_stop to send a break or ^C. If there is no
3502 response from the target (it didn't stop when the user requested it),
3503 we ask the user if he'd like to detach from the target. */
3505 remote_interrupt (int signo
)
3507 /* If this doesn't work, try more severe steps. */
3508 signal (signo
, remote_interrupt_twice
);
3510 gdb_call_async_signal_handler (sigint_remote_token
, 1);
3513 /* The user typed ^C twice. */
3516 remote_interrupt_twice (int signo
)
3518 signal (signo
, ofunc
);
3519 gdb_call_async_signal_handler (sigint_remote_twice_token
, 1);
3520 signal (signo
, remote_interrupt
);
3523 /* This is the generic stop called via the target vector. When a target
3524 interrupt is requested, either by the command line or the GUI, we
3525 will eventually end up here. */
3527 remote_stop (ptid_t ptid
)
3529 /* Send a break or a ^C, depending on user preference. */
3531 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
3534 serial_send_break (remote_desc
);
3536 serial_write (remote_desc
, "\003", 1);
3539 /* Ask the user what to do when an interrupt is received. */
3542 interrupt_query (void)
3544 target_terminal_ours ();
3546 if (query ("Interrupted while waiting for the program.\n\
3547 Give up (and stop debugging it)? "))
3549 target_mourn_inferior ();
3550 signal (SIGINT
, handle_sigint
);
3551 deprecated_throw_reason (RETURN_QUIT
);
3554 target_terminal_inferior ();
3557 /* Enable/disable target terminal ownership. Most targets can use
3558 terminal groups to control terminal ownership. Remote targets are
3559 different in that explicit transfer of ownership to/from GDB/target
3563 remote_terminal_inferior (void)
3565 if (!target_async_permitted
)
3566 /* Nothing to do. */
3569 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
3570 sync_execution here. This function should only be called when
3571 GDB is resuming the inferior in the forground. A background
3572 resume (``run&'') should leave GDB in control of the terminal and
3573 consequently should not call this code. */
3574 if (!sync_execution
)
3576 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
3577 calls target_terminal_*() idenpotent. The event-loop GDB talking
3578 to an asynchronous target with a synchronous command calls this
3579 function from both event-top.c and infrun.c/infcmd.c. Once GDB
3580 stops trying to transfer the terminal to the target when it
3581 shouldn't this guard can go away. */
3582 if (!remote_async_terminal_ours_p
)
3584 delete_file_handler (input_fd
);
3585 remote_async_terminal_ours_p
= 0;
3586 initialize_sigint_signal_handler ();
3587 /* NOTE: At this point we could also register our selves as the
3588 recipient of all input. Any characters typed could then be
3589 passed on down to the target. */
3593 remote_terminal_ours (void)
3595 if (!target_async_permitted
)
3596 /* Nothing to do. */
3599 /* See FIXME in remote_terminal_inferior. */
3600 if (!sync_execution
)
3602 /* See FIXME in remote_terminal_inferior. */
3603 if (remote_async_terminal_ours_p
)
3605 cleanup_sigint_signal_handler (NULL
);
3606 add_file_handler (input_fd
, stdin_event_handler
, 0);
3607 remote_async_terminal_ours_p
= 1;
3611 remote_console_output (char *msg
)
3615 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
3618 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
3621 fputs_unfiltered (tb
, gdb_stdtarg
);
3623 gdb_flush (gdb_stdtarg
);
3626 /* Wait until the remote machine stops, then return,
3627 storing status in STATUS just as `wait' would. */
3630 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
)
3632 struct remote_state
*rs
= get_remote_state ();
3633 struct remote_arch_state
*rsa
= get_remote_arch_state ();
3634 ptid_t event_ptid
= null_ptid
;
3636 int solibs_changed
= 0;
3639 status
->kind
= TARGET_WAITKIND_IGNORE
;
3640 status
->value
.integer
= 0;
3642 if (rs
->cached_wait_status
)
3643 /* Use the cached wait status, but only once. */
3644 rs
->cached_wait_status
= 0;
3647 if (!target_is_async_p ())
3649 ofunc
= signal (SIGINT
, remote_interrupt
);
3650 /* If the user hit C-c before this packet, or between
3651 packets, pretend that it was hit right here. */
3655 remote_interrupt (SIGINT
);
3658 /* FIXME: cagney/1999-09-27: If we're in async mode we should
3659 _never_ wait for ever -> test on target_is_async_p().
3660 However, before we do that we need to ensure that the caller
3661 knows how to take the target into/out of async mode. */
3662 getpkt (&rs
->buf
, &rs
->buf_size
, wait_forever_enabled_p
);
3663 if (!target_is_async_p ())
3664 signal (SIGINT
, ofunc
);
3669 remote_stopped_by_watchpoint_p
= 0;
3671 /* We got something. */
3672 rs
->waiting_for_stop_reply
= 0;
3676 case 'E': /* Error of some sort. */
3677 /* We're out of sync with the target now. Did it continue or
3678 not? Not is more likely, so report a stop. */
3679 warning (_("Remote failure reply: %s"), buf
);
3680 status
->kind
= TARGET_WAITKIND_STOPPED
;
3681 status
->value
.sig
= TARGET_SIGNAL_0
;
3683 case 'F': /* File-I/O request. */
3684 remote_fileio_request (buf
);
3686 /* This stop reply is special. We reply back to the stub,
3687 and keep waiting for the target to stop. */
3688 rs
->waiting_for_stop_reply
= 1;
3690 case 'T': /* Status with PC, SP, FP, ... */
3692 gdb_byte regs
[MAX_REGISTER_SIZE
];
3694 /* Expedited reply, containing Signal, {regno, reg} repeat. */
3695 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3697 n... = register number
3698 r... = register contents
3700 p
= &buf
[3]; /* after Txx */
3709 /* If the packet contains a register number, save it in
3710 pnum and set p1 to point to the character following it.
3711 Otherwise p1 points to p. */
3713 /* If this packet is an awatch packet, don't parse the
3714 'a' as a register number. */
3716 if (strncmp (p
, "awatch", strlen("awatch")) != 0)
3718 /* Read the ``P'' register number. */
3719 pnum
= strtol (p
, &p_temp
, 16);
3725 if (p1
== p
) /* No register number present here. */
3727 p1
= strchr (p
, ':');
3729 error (_("Malformed packet(a) (missing colon): %s\n\
3732 if (strncmp (p
, "thread", p1
- p
) == 0)
3733 event_ptid
= read_ptid (++p1
, &p
);
3734 else if ((strncmp (p
, "watch", p1
- p
) == 0)
3735 || (strncmp (p
, "rwatch", p1
- p
) == 0)
3736 || (strncmp (p
, "awatch", p1
- p
) == 0))
3738 remote_stopped_by_watchpoint_p
= 1;
3739 p
= unpack_varlen_hex (++p1
, &addr
);
3740 remote_watch_data_address
= (CORE_ADDR
)addr
;
3742 else if (strncmp (p
, "library", p1
- p
) == 0)
3746 while (*p_temp
&& *p_temp
!= ';')
3754 /* Silently skip unknown optional info. */
3755 p_temp
= strchr (p1
+ 1, ';');
3762 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
3766 error (_("Malformed packet(b) (missing colon): %s\n\
3772 error (_("Remote sent bad register number %s: %s\n\
3774 phex_nz (pnum
, 0), p
, buf
);
3776 fieldsize
= hex2bin (p
, regs
,
3777 register_size (target_gdbarch
,
3780 if (fieldsize
< register_size (target_gdbarch
,
3782 warning (_("Remote reply is too short: %s"), buf
);
3783 regcache_raw_supply (get_current_regcache (),
3788 error (_("Remote register badly formatted: %s\nhere: %s"),
3794 case 'S': /* Old style status, just signal only. */
3796 status
->kind
= TARGET_WAITKIND_LOADED
;
3799 status
->kind
= TARGET_WAITKIND_STOPPED
;
3800 status
->value
.sig
= (enum target_signal
)
3801 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3804 case 'W': /* Target exited. */
3811 /* GDB used to accept only 2 hex chars here. Stubs should
3812 only send more if they detect GDB supports multi-process
3814 p
= unpack_varlen_hex (&buf
[1], &value
);
3818 /* The remote process exited. */
3819 status
->kind
= TARGET_WAITKIND_EXITED
;
3820 status
->value
.integer
= value
;
3824 /* The remote process exited with a signal. */
3825 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
3826 status
->value
.sig
= (enum target_signal
) value
;
3829 /* If no process is specified, assume inferior_ptid. */
3830 pid
= ptid_get_pid (inferior_ptid
);
3839 else if (strncmp (p
,
3840 "process:", sizeof ("process:") - 1) == 0)
3843 p
+= sizeof ("process:") - 1;
3844 unpack_varlen_hex (p
, &upid
);
3848 error (_("unknown stop reply packet: %s"), buf
);
3851 error (_("unknown stop reply packet: %s"), buf
);
3852 event_ptid
= pid_to_ptid (pid
);
3855 case 'O': /* Console output. */
3856 remote_console_output (buf
+ 1);
3858 /* The target didn't really stop; keep waiting. */
3859 rs
->waiting_for_stop_reply
= 1;
3863 if (last_sent_signal
!= TARGET_SIGNAL_0
)
3865 /* Zero length reply means that we tried 'S' or 'C' and the
3866 remote system doesn't support it. */
3867 target_terminal_ours_for_output ();
3869 ("Can't send signals to this remote system. %s not sent.\n",
3870 target_signal_to_name (last_sent_signal
));
3871 last_sent_signal
= TARGET_SIGNAL_0
;
3872 target_terminal_inferior ();
3874 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
3875 putpkt ((char *) buf
);
3877 /* We just told the target to resume, so a stop reply is in
3879 rs
->waiting_for_stop_reply
= 1;
3882 /* else fallthrough */
3884 warning (_("Invalid remote reply: %s"), buf
);
3886 rs
->waiting_for_stop_reply
= 1;
3890 /* Nothing interesting happened. */
3891 if (status
->kind
== TARGET_WAITKIND_IGNORE
)
3892 return minus_one_ptid
;
3894 if (status
->kind
== TARGET_WAITKIND_EXITED
3895 || status
->kind
== TARGET_WAITKIND_SIGNALLED
)
3897 int pid
= ptid_get_pid (event_ptid
);
3898 delete_inferior (pid
);
3902 if (!ptid_equal (event_ptid
, null_ptid
))
3903 record_currthread (event_ptid
);
3905 event_ptid
= inferior_ptid
;
3912 remote_wait (ptid_t ptid
, struct target_waitstatus
*status
)
3916 /* In synchronous mode, keep waiting until the target stops. In
3917 asynchronous mode, always return to the event loop. */
3921 event_ptid
= remote_wait_as (ptid
, status
);
3923 while (status
->kind
== TARGET_WAITKIND_IGNORE
3924 && !target_can_async_p ());
3929 /* Fetch a single register using a 'p' packet. */
3932 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
3934 struct remote_state
*rs
= get_remote_state ();
3936 char regp
[MAX_REGISTER_SIZE
];
3939 if (remote_protocol_packets
[PACKET_p
].support
== PACKET_DISABLE
)
3942 if (reg
->pnum
== -1)
3947 p
+= hexnumstr (p
, reg
->pnum
);
3949 remote_send (&rs
->buf
, &rs
->buf_size
);
3953 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
3957 case PACKET_UNKNOWN
:
3960 error (_("Could not fetch register \"%s\""),
3961 gdbarch_register_name (get_regcache_arch (regcache
), reg
->regnum
));
3964 /* If this register is unfetchable, tell the regcache. */
3967 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
3971 /* Otherwise, parse and supply the value. */
3977 error (_("fetch_register_using_p: early buf termination"));
3979 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3982 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
3986 /* Fetch the registers included in the target's 'g' packet. */
3989 send_g_packet (void)
3991 struct remote_state
*rs
= get_remote_state ();
3996 sprintf (rs
->buf
, "g");
3997 remote_send (&rs
->buf
, &rs
->buf_size
);
3999 /* We can get out of synch in various cases. If the first character
4000 in the buffer is not a hex character, assume that has happened
4001 and try to fetch another packet to read. */
4002 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
4003 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
4004 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
4005 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
4008 fprintf_unfiltered (gdb_stdlog
,
4009 "Bad register packet; fetching a new packet\n");
4010 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4013 buf_len
= strlen (rs
->buf
);
4015 /* Sanity check the received packet. */
4016 if (buf_len
% 2 != 0)
4017 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
4023 process_g_packet (struct regcache
*regcache
)
4025 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
4026 struct remote_state
*rs
= get_remote_state ();
4027 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4032 buf_len
= strlen (rs
->buf
);
4034 /* Further sanity checks, with knowledge of the architecture. */
4035 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
4036 error (_("Remote 'g' packet reply is too long: %s"), rs
->buf
);
4038 /* Save the size of the packet sent to us by the target. It is used
4039 as a heuristic when determining the max size of packets that the
4040 target can safely receive. */
4041 if (rsa
->actual_register_packet_size
== 0)
4042 rsa
->actual_register_packet_size
= buf_len
;
4044 /* If this is smaller than we guessed the 'g' packet would be,
4045 update our records. A 'g' reply that doesn't include a register's
4046 value implies either that the register is not available, or that
4047 the 'p' packet must be used. */
4048 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
4050 rsa
->sizeof_g_packet
= buf_len
/ 2;
4052 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
4054 if (rsa
->regs
[i
].pnum
== -1)
4057 if (rsa
->regs
[i
].offset
>= rsa
->sizeof_g_packet
)
4058 rsa
->regs
[i
].in_g_packet
= 0;
4060 rsa
->regs
[i
].in_g_packet
= 1;
4064 regs
= alloca (rsa
->sizeof_g_packet
);
4066 /* Unimplemented registers read as all bits zero. */
4067 memset (regs
, 0, rsa
->sizeof_g_packet
);
4069 /* Reply describes registers byte by byte, each byte encoded as two
4070 hex characters. Suck them all up, then supply them to the
4071 register cacheing/storage mechanism. */
4074 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
4076 if (p
[0] == 0 || p
[1] == 0)
4077 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
4078 internal_error (__FILE__
, __LINE__
,
4079 "unexpected end of 'g' packet reply");
4081 if (p
[0] == 'x' && p
[1] == 'x')
4082 regs
[i
] = 0; /* 'x' */
4084 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
4090 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
4092 struct packet_reg
*r
= &rsa
->regs
[i
];
4095 if (r
->offset
* 2 >= strlen (rs
->buf
))
4096 /* This shouldn't happen - we adjusted in_g_packet above. */
4097 internal_error (__FILE__
, __LINE__
,
4098 "unexpected end of 'g' packet reply");
4099 else if (rs
->buf
[r
->offset
* 2] == 'x')
4101 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
4102 /* The register isn't available, mark it as such (at
4103 the same time setting the value to zero). */
4104 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
4107 regcache_raw_supply (regcache
, r
->regnum
,
4115 fetch_registers_using_g (struct regcache
*regcache
)
4118 process_g_packet (regcache
);
4122 remote_fetch_registers (struct regcache
*regcache
, int regnum
)
4124 struct remote_state
*rs
= get_remote_state ();
4125 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4128 set_general_thread (inferior_ptid
);
4132 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
4133 gdb_assert (reg
!= NULL
);
4135 /* If this register might be in the 'g' packet, try that first -
4136 we are likely to read more than one register. If this is the
4137 first 'g' packet, we might be overly optimistic about its
4138 contents, so fall back to 'p'. */
4139 if (reg
->in_g_packet
)
4141 fetch_registers_using_g (regcache
);
4142 if (reg
->in_g_packet
)
4146 if (fetch_register_using_p (regcache
, reg
))
4149 /* This register is not available. */
4150 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
4155 fetch_registers_using_g (regcache
);
4157 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
4158 if (!rsa
->regs
[i
].in_g_packet
)
4159 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
4161 /* This register is not available. */
4162 regcache_raw_supply (regcache
, i
, NULL
);
4166 /* Prepare to store registers. Since we may send them all (using a
4167 'G' request), we have to read out the ones we don't want to change
4171 remote_prepare_to_store (struct regcache
*regcache
)
4173 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4175 gdb_byte buf
[MAX_REGISTER_SIZE
];
4177 /* Make sure the entire registers array is valid. */
4178 switch (remote_protocol_packets
[PACKET_P
].support
)
4180 case PACKET_DISABLE
:
4181 case PACKET_SUPPORT_UNKNOWN
:
4182 /* Make sure all the necessary registers are cached. */
4183 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
4184 if (rsa
->regs
[i
].in_g_packet
)
4185 regcache_raw_read (regcache
, rsa
->regs
[i
].regnum
, buf
);
4192 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
4193 packet was not recognized. */
4196 store_register_using_P (const struct regcache
*regcache
, struct packet_reg
*reg
)
4198 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
4199 struct remote_state
*rs
= get_remote_state ();
4200 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4201 /* Try storing a single register. */
4202 char *buf
= rs
->buf
;
4203 gdb_byte regp
[MAX_REGISTER_SIZE
];
4206 if (remote_protocol_packets
[PACKET_P
].support
== PACKET_DISABLE
)
4209 if (reg
->pnum
== -1)
4212 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
4213 p
= buf
+ strlen (buf
);
4214 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
4215 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
4216 remote_send (&rs
->buf
, &rs
->buf_size
);
4218 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
4223 error (_("Could not write register \"%s\""),
4224 gdbarch_register_name (gdbarch
, reg
->regnum
));
4225 case PACKET_UNKNOWN
:
4228 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
4232 /* Store register REGNUM, or all registers if REGNUM == -1, from the
4233 contents of the register cache buffer. FIXME: ignores errors. */
4236 store_registers_using_G (const struct regcache
*regcache
)
4238 struct remote_state
*rs
= get_remote_state ();
4239 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4243 /* Extract all the registers in the regcache copying them into a
4247 regs
= alloca (rsa
->sizeof_g_packet
);
4248 memset (regs
, 0, rsa
->sizeof_g_packet
);
4249 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
4251 struct packet_reg
*r
= &rsa
->regs
[i
];
4253 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
4257 /* Command describes registers byte by byte,
4258 each byte encoded as two hex characters. */
4261 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
4263 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
4264 remote_send (&rs
->buf
, &rs
->buf_size
);
4267 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
4268 of the register cache buffer. FIXME: ignores errors. */
4271 remote_store_registers (struct regcache
*regcache
, int regnum
)
4273 struct remote_state
*rs
= get_remote_state ();
4274 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4277 set_general_thread (inferior_ptid
);
4281 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
4282 gdb_assert (reg
!= NULL
);
4284 /* Always prefer to store registers using the 'P' packet if
4285 possible; we often change only a small number of registers.
4286 Sometimes we change a larger number; we'd need help from a
4287 higher layer to know to use 'G'. */
4288 if (store_register_using_P (regcache
, reg
))
4291 /* For now, don't complain if we have no way to write the
4292 register. GDB loses track of unavailable registers too
4293 easily. Some day, this may be an error. We don't have
4294 any way to read the register, either... */
4295 if (!reg
->in_g_packet
)
4298 store_registers_using_G (regcache
);
4302 store_registers_using_G (regcache
);
4304 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
4305 if (!rsa
->regs
[i
].in_g_packet
)
4306 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
4307 /* See above for why we do not issue an error here. */
4312 /* Return the number of hex digits in num. */
4315 hexnumlen (ULONGEST num
)
4319 for (i
= 0; num
!= 0; i
++)
4325 /* Set BUF to the minimum number of hex digits representing NUM. */
4328 hexnumstr (char *buf
, ULONGEST num
)
4330 int len
= hexnumlen (num
);
4331 return hexnumnstr (buf
, num
, len
);
4335 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
4338 hexnumnstr (char *buf
, ULONGEST num
, int width
)
4344 for (i
= width
- 1; i
>= 0; i
--)
4346 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
4353 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
4356 remote_address_masked (CORE_ADDR addr
)
4358 int address_size
= remote_address_size
;
4359 /* If "remoteaddresssize" was not set, default to target address size. */
4361 address_size
= gdbarch_addr_bit (target_gdbarch
);
4363 if (address_size
> 0
4364 && address_size
< (sizeof (ULONGEST
) * 8))
4366 /* Only create a mask when that mask can safely be constructed
4367 in a ULONGEST variable. */
4369 mask
= (mask
<< address_size
) - 1;
4375 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
4376 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
4377 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
4378 (which may be more than *OUT_LEN due to escape characters). The
4379 total number of bytes in the output buffer will be at most
4383 remote_escape_output (const gdb_byte
*buffer
, int len
,
4384 gdb_byte
*out_buf
, int *out_len
,
4387 int input_index
, output_index
;
4390 for (input_index
= 0; input_index
< len
; input_index
++)
4392 gdb_byte b
= buffer
[input_index
];
4394 if (b
== '$' || b
== '#' || b
== '}')
4396 /* These must be escaped. */
4397 if (output_index
+ 2 > out_maxlen
)
4399 out_buf
[output_index
++] = '}';
4400 out_buf
[output_index
++] = b
^ 0x20;
4404 if (output_index
+ 1 > out_maxlen
)
4406 out_buf
[output_index
++] = b
;
4410 *out_len
= input_index
;
4411 return output_index
;
4414 /* Convert BUFFER, escaped data LEN bytes long, into binary data
4415 in OUT_BUF. Return the number of bytes written to OUT_BUF.
4416 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
4418 This function reverses remote_escape_output. It allows more
4419 escaped characters than that function does, in particular because
4420 '*' must be escaped to avoid the run-length encoding processing
4421 in reading packets. */
4424 remote_unescape_input (const gdb_byte
*buffer
, int len
,
4425 gdb_byte
*out_buf
, int out_maxlen
)
4427 int input_index
, output_index
;
4432 for (input_index
= 0; input_index
< len
; input_index
++)
4434 gdb_byte b
= buffer
[input_index
];
4436 if (output_index
+ 1 > out_maxlen
)
4438 warning (_("Received too much data from remote target;"
4439 " ignoring overflow."));
4440 return output_index
;
4445 out_buf
[output_index
++] = b
^ 0x20;
4451 out_buf
[output_index
++] = b
;
4455 error (_("Unmatched escape character in target response."));
4457 return output_index
;
4460 /* Determine whether the remote target supports binary downloading.
4461 This is accomplished by sending a no-op memory write of zero length
4462 to the target at the specified address. It does not suffice to send
4463 the whole packet, since many stubs strip the eighth bit and
4464 subsequently compute a wrong checksum, which causes real havoc with
4467 NOTE: This can still lose if the serial line is not eight-bit
4468 clean. In cases like this, the user should clear "remote
4472 check_binary_download (CORE_ADDR addr
)
4474 struct remote_state
*rs
= get_remote_state ();
4476 switch (remote_protocol_packets
[PACKET_X
].support
)
4478 case PACKET_DISABLE
:
4482 case PACKET_SUPPORT_UNKNOWN
:
4488 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4490 p
+= hexnumstr (p
, (ULONGEST
) 0);
4494 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
4495 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4497 if (rs
->buf
[0] == '\0')
4500 fprintf_unfiltered (gdb_stdlog
,
4501 "binary downloading NOT suppported by target\n");
4502 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
4507 fprintf_unfiltered (gdb_stdlog
,
4508 "binary downloading suppported by target\n");
4509 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
4516 /* Write memory data directly to the remote machine.
4517 This does not inform the data cache; the data cache uses this.
4518 HEADER is the starting part of the packet.
4519 MEMADDR is the address in the remote memory space.
4520 MYADDR is the address of the buffer in our space.
4521 LEN is the number of bytes.
4522 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
4523 should send data as binary ('X'), or hex-encoded ('M').
4525 The function creates packet of the form
4526 <HEADER><ADDRESS>,<LENGTH>:<DATA>
4528 where encoding of <DATA> is termined by PACKET_FORMAT.
4530 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
4533 Returns the number of bytes transferred, or 0 (setting errno) for
4534 error. Only transfer a single packet. */
4537 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
4538 const gdb_byte
*myaddr
, int len
,
4539 char packet_format
, int use_length
)
4541 struct remote_state
*rs
= get_remote_state ();
4551 if (packet_format
!= 'X' && packet_format
!= 'M')
4552 internal_error (__FILE__
, __LINE__
,
4553 "remote_write_bytes_aux: bad packet format");
4558 payload_size
= get_memory_write_packet_size ();
4560 /* The packet buffer will be large enough for the payload;
4561 get_memory_packet_size ensures this. */
4564 /* Compute the size of the actual payload by subtracting out the
4565 packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
4567 payload_size
-= strlen ("$,:#NN");
4569 /* The comma won't be used. */
4571 header_length
= strlen (header
);
4572 payload_size
-= header_length
;
4573 payload_size
-= hexnumlen (memaddr
);
4575 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
4577 strcat (rs
->buf
, header
);
4578 p
= rs
->buf
+ strlen (header
);
4580 /* Compute a best guess of the number of bytes actually transfered. */
4581 if (packet_format
== 'X')
4583 /* Best guess at number of bytes that will fit. */
4584 todo
= min (len
, payload_size
);
4586 payload_size
-= hexnumlen (todo
);
4587 todo
= min (todo
, payload_size
);
4591 /* Num bytes that will fit. */
4592 todo
= min (len
, payload_size
/ 2);
4594 payload_size
-= hexnumlen (todo
);
4595 todo
= min (todo
, payload_size
/ 2);
4599 internal_error (__FILE__
, __LINE__
,
4600 _("minumum packet size too small to write data"));
4602 /* If we already need another packet, then try to align the end
4603 of this packet to a useful boundary. */
4604 if (todo
> 2 * REMOTE_ALIGN_WRITES
&& todo
< len
)
4605 todo
= ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
4607 /* Append "<memaddr>". */
4608 memaddr
= remote_address_masked (memaddr
);
4609 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
4616 /* Append <len>. Retain the location/size of <len>. It may need to
4617 be adjusted once the packet body has been created. */
4619 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
4627 /* Append the packet body. */
4628 if (packet_format
== 'X')
4630 /* Binary mode. Send target system values byte by byte, in
4631 increasing byte addresses. Only escape certain critical
4633 payload_length
= remote_escape_output (myaddr
, todo
, p
, &nr_bytes
,
4636 /* If not all TODO bytes fit, then we'll need another packet. Make
4637 a second try to keep the end of the packet aligned. Don't do
4638 this if the packet is tiny. */
4639 if (nr_bytes
< todo
&& nr_bytes
> 2 * REMOTE_ALIGN_WRITES
)
4643 new_nr_bytes
= (((memaddr
+ nr_bytes
) & ~(REMOTE_ALIGN_WRITES
- 1))
4645 if (new_nr_bytes
!= nr_bytes
)
4646 payload_length
= remote_escape_output (myaddr
, new_nr_bytes
,
4651 p
+= payload_length
;
4652 if (use_length
&& nr_bytes
< todo
)
4654 /* Escape chars have filled up the buffer prematurely,
4655 and we have actually sent fewer bytes than planned.
4656 Fix-up the length field of the packet. Use the same
4657 number of characters as before. */
4658 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
4659 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
4664 /* Normal mode: Send target system values byte by byte, in
4665 increasing byte addresses. Each byte is encoded as a two hex
4667 nr_bytes
= bin2hex (myaddr
, p
, todo
);
4671 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
4672 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4674 if (rs
->buf
[0] == 'E')
4676 /* There is no correspondance between what the remote protocol
4677 uses for errors and errno codes. We would like a cleaner way
4678 of representing errors (big enough to include errno codes,
4679 bfd_error codes, and others). But for now just return EIO. */
4684 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
4685 fewer bytes than we'd planned. */
4689 /* Write memory data directly to the remote machine.
4690 This does not inform the data cache; the data cache uses this.
4691 MEMADDR is the address in the remote memory space.
4692 MYADDR is the address of the buffer in our space.
4693 LEN is the number of bytes.
4695 Returns number of bytes transferred, or 0 (setting errno) for
4696 error. Only transfer a single packet. */
4699 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, int len
)
4701 char *packet_format
= 0;
4703 /* Check whether the target supports binary download. */
4704 check_binary_download (memaddr
);
4706 switch (remote_protocol_packets
[PACKET_X
].support
)
4709 packet_format
= "X";
4711 case PACKET_DISABLE
:
4712 packet_format
= "M";
4714 case PACKET_SUPPORT_UNKNOWN
:
4715 internal_error (__FILE__
, __LINE__
,
4716 _("remote_write_bytes: bad internal state"));
4718 internal_error (__FILE__
, __LINE__
, _("bad switch"));
4721 return remote_write_bytes_aux (packet_format
,
4722 memaddr
, myaddr
, len
, packet_format
[0], 1);
4725 /* Read memory data directly from the remote machine.
4726 This does not use the data cache; the data cache uses this.
4727 MEMADDR is the address in the remote memory space.
4728 MYADDR is the address of the buffer in our space.
4729 LEN is the number of bytes.
4731 Returns number of bytes transferred, or 0 for error. */
4733 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
4734 remote targets) shouldn't attempt to read the entire buffer.
4735 Instead it should read a single packet worth of data and then
4736 return the byte size of that packet to the caller. The caller (its
4737 caller and its callers caller ;-) already contains code for
4738 handling partial reads. */
4741 remote_read_bytes (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
4743 struct remote_state
*rs
= get_remote_state ();
4744 int max_buf_size
; /* Max size of packet output buffer. */
4750 max_buf_size
= get_memory_read_packet_size ();
4751 /* The packet buffer will be large enough for the payload;
4752 get_memory_packet_size ensures this. */
4761 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
4763 /* construct "m"<memaddr>","<len>" */
4764 /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */
4765 memaddr
= remote_address_masked (memaddr
);
4768 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
4770 p
+= hexnumstr (p
, (ULONGEST
) todo
);
4774 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4776 if (rs
->buf
[0] == 'E'
4777 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
4778 && rs
->buf
[3] == '\0')
4780 /* There is no correspondance between what the remote
4781 protocol uses for errors and errno codes. We would like
4782 a cleaner way of representing errors (big enough to
4783 include errno codes, bfd_error codes, and others). But
4784 for now just return EIO. */
4789 /* Reply describes memory byte by byte,
4790 each byte encoded as two hex characters. */
4793 if ((i
= hex2bin (p
, myaddr
, todo
)) < todo
)
4795 /* Reply is short. This means that we were able to read
4796 only part of what we wanted to. */
4797 return i
+ (origlen
- len
);
4806 /* Read or write LEN bytes from inferior memory at MEMADDR,
4807 transferring to or from debugger address BUFFER. Write to inferior
4808 if SHOULD_WRITE is nonzero. Returns length of data written or
4809 read; 0 for error. TARGET is unused. */
4812 remote_xfer_memory (CORE_ADDR mem_addr
, gdb_byte
*buffer
, int mem_len
,
4813 int should_write
, struct mem_attrib
*attrib
,
4814 struct target_ops
*target
)
4818 set_general_thread (inferior_ptid
);
4821 res
= remote_write_bytes (mem_addr
, buffer
, mem_len
);
4823 res
= remote_read_bytes (mem_addr
, buffer
, mem_len
);
4828 /* Sends a packet with content determined by the printf format string
4829 FORMAT and the remaining arguments, then gets the reply. Returns
4830 whether the packet was a success, a failure, or unknown. */
4833 remote_send_printf (const char *format
, ...)
4835 struct remote_state
*rs
= get_remote_state ();
4836 int max_size
= get_remote_packet_size ();
4839 va_start (ap
, format
);
4842 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
4843 internal_error (__FILE__
, __LINE__
, "Too long remote packet.");
4845 if (putpkt (rs
->buf
) < 0)
4846 error (_("Communication problem with target."));
4849 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4851 return packet_check_result (rs
->buf
);
4855 restore_remote_timeout (void *p
)
4857 int value
= *(int *)p
;
4858 remote_timeout
= value
;
4861 /* Flash writing can take quite some time. We'll set
4862 effectively infinite timeout for flash operations.
4863 In future, we'll need to decide on a better approach. */
4864 static const int remote_flash_timeout
= 1000;
4867 remote_flash_erase (struct target_ops
*ops
,
4868 ULONGEST address
, LONGEST length
)
4870 int saved_remote_timeout
= remote_timeout
;
4871 enum packet_result ret
;
4873 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
4874 &saved_remote_timeout
);
4875 remote_timeout
= remote_flash_timeout
;
4877 ret
= remote_send_printf ("vFlashErase:%s,%s",
4882 case PACKET_UNKNOWN
:
4883 error (_("Remote target does not support flash erase"));
4885 error (_("Error erasing flash with vFlashErase packet"));
4890 do_cleanups (back_to
);
4894 remote_flash_write (struct target_ops
*ops
,
4895 ULONGEST address
, LONGEST length
,
4896 const gdb_byte
*data
)
4898 int saved_remote_timeout
= remote_timeout
;
4900 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
4901 &saved_remote_timeout
);
4903 remote_timeout
= remote_flash_timeout
;
4904 ret
= remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 'X', 0);
4905 do_cleanups (back_to
);
4911 remote_flash_done (struct target_ops
*ops
)
4913 int saved_remote_timeout
= remote_timeout
;
4915 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
4916 &saved_remote_timeout
);
4918 remote_timeout
= remote_flash_timeout
;
4919 ret
= remote_send_printf ("vFlashDone");
4920 do_cleanups (back_to
);
4924 case PACKET_UNKNOWN
:
4925 error (_("Remote target does not support vFlashDone"));
4927 error (_("Error finishing flash operation"));
4934 remote_files_info (struct target_ops
*ignore
)
4936 puts_filtered ("Debugging a target over a serial line.\n");
4939 /* Stuff for dealing with the packets which are part of this protocol.
4940 See comment at top of file for details. */
4942 /* Read a single character from the remote end. */
4945 readchar (int timeout
)
4949 ch
= serial_readchar (remote_desc
, timeout
);
4954 switch ((enum serial_rc
) ch
)
4957 target_mourn_inferior ();
4958 error (_("Remote connection closed"));
4961 perror_with_name (_("Remote communication error"));
4963 case SERIAL_TIMEOUT
:
4969 /* Send the command in *BUF to the remote machine, and read the reply
4970 into *BUF. Report an error if we get an error reply. Resize
4971 *BUF using xrealloc if necessary to hold the result, and update
4975 remote_send (char **buf
,
4979 getpkt (buf
, sizeof_buf
, 0);
4981 if ((*buf
)[0] == 'E')
4982 error (_("Remote failure reply: %s"), *buf
);
4985 /* Display a null-terminated packet on stdout, for debugging, using C
4989 print_packet (char *buf
)
4991 puts_filtered ("\"");
4992 fputstr_filtered (buf
, '"', gdb_stdout
);
4993 puts_filtered ("\"");
4999 return putpkt_binary (buf
, strlen (buf
));
5002 /* Send a packet to the remote machine, with error checking. The data
5003 of the packet is in BUF. The string in BUF can be at most
5004 get_remote_packet_size () - 5 to account for the $, # and checksum,
5005 and for a possible /0 if we are debugging (remote_debug) and want
5006 to print the sent packet as a string. */
5009 putpkt_binary (char *buf
, int cnt
)
5011 struct remote_state
*rs
= get_remote_state ();
5013 unsigned char csum
= 0;
5014 char *buf2
= alloca (cnt
+ 6);
5020 /* Catch cases like trying to read memory or listing threads while
5021 we're waiting for a stop reply. The remote server wouldn't be
5022 ready to handle this request, so we'd hang and timeout. We don't
5023 have to worry about this in synchronous mode, because in that
5024 case it's not possible to issue a command while the target is
5026 if (target_can_async_p () && rs
->waiting_for_stop_reply
)
5027 error (_("Cannot execute this command while the target is running."));
5029 /* We're sending out a new packet. Make sure we don't look at a
5030 stale cached response. */
5031 rs
->cached_wait_status
= 0;
5033 /* Copy the packet into buffer BUF2, encapsulating it
5034 and giving it a checksum. */
5039 for (i
= 0; i
< cnt
; i
++)
5045 *p
++ = tohex ((csum
>> 4) & 0xf);
5046 *p
++ = tohex (csum
& 0xf);
5048 /* Send it over and over until we get a positive ack. */
5052 int started_error_output
= 0;
5057 fprintf_unfiltered (gdb_stdlog
, "Sending packet: ");
5058 fputstrn_unfiltered (buf2
, p
- buf2
, 0, gdb_stdlog
);
5059 fprintf_unfiltered (gdb_stdlog
, "...");
5060 gdb_flush (gdb_stdlog
);
5062 if (serial_write (remote_desc
, buf2
, p
- buf2
))
5063 perror_with_name (_("putpkt: write failed"));
5065 /* If this is a no acks version of the remote protocol, send the
5066 packet and move on. */
5070 /* Read until either a timeout occurs (-2) or '+' is read. */
5073 ch
= readchar (remote_timeout
);
5081 case SERIAL_TIMEOUT
:
5083 if (started_error_output
)
5085 putchar_unfiltered ('\n');
5086 started_error_output
= 0;
5095 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
5099 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
5100 case SERIAL_TIMEOUT
:
5104 break; /* Retransmit buffer. */
5108 fprintf_unfiltered (gdb_stdlog
,
5109 "Packet instead of Ack, ignoring it\n");
5110 /* It's probably an old response sent because an ACK
5111 was lost. Gobble up the packet and ack it so it
5112 doesn't get retransmitted when we resend this
5115 serial_write (remote_desc
, "+", 1);
5116 continue; /* Now, go look for +. */
5121 if (!started_error_output
)
5123 started_error_output
= 1;
5124 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
5126 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
5130 break; /* Here to retransmit. */
5134 /* This is wrong. If doing a long backtrace, the user should be
5135 able to get out next time we call QUIT, without anything as
5136 violent as interrupt_query. If we want to provide a way out of
5137 here without getting to the next QUIT, it should be based on
5138 hitting ^C twice as in remote_wait. */
5149 /* Come here after finding the start of a frame when we expected an
5150 ack. Do our best to discard the rest of this packet. */
5159 c
= readchar (remote_timeout
);
5162 case SERIAL_TIMEOUT
:
5163 /* Nothing we can do. */
5166 /* Discard the two bytes of checksum and stop. */
5167 c
= readchar (remote_timeout
);
5169 c
= readchar (remote_timeout
);
5172 case '*': /* Run length encoding. */
5173 /* Discard the repeat count. */
5174 c
= readchar (remote_timeout
);
5179 /* A regular character. */
5185 /* Come here after finding the start of the frame. Collect the rest
5186 into *BUF, verifying the checksum, length, and handling run-length
5187 compression. NUL terminate the buffer. If there is not enough room,
5188 expand *BUF using xrealloc.
5190 Returns -1 on error, number of characters in buffer (ignoring the
5191 trailing NULL) on success. (could be extended to return one of the
5192 SERIAL status indications). */
5195 read_frame (char **buf_p
,
5202 struct remote_state
*rs
= get_remote_state ();
5209 c
= readchar (remote_timeout
);
5212 case SERIAL_TIMEOUT
:
5214 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
5218 fputs_filtered ("Saw new packet start in middle of old one\n",
5220 return -1; /* Start a new packet, count retries. */
5223 unsigned char pktcsum
;
5229 check_0
= readchar (remote_timeout
);
5231 check_1
= readchar (remote_timeout
);
5233 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
5236 fputs_filtered ("Timeout in checksum, retrying\n",
5240 else if (check_0
< 0 || check_1
< 0)
5243 fputs_filtered ("Communication error in checksum\n",
5248 /* Don't recompute the checksum; with no ack packets we
5249 don't have any way to indicate a packet retransmission
5254 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
5255 if (csum
== pktcsum
)
5260 fprintf_filtered (gdb_stdlog
,
5261 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
5263 fputstrn_filtered (buf
, bc
, 0, gdb_stdlog
);
5264 fputs_filtered ("\n", gdb_stdlog
);
5266 /* Number of characters in buffer ignoring trailing
5270 case '*': /* Run length encoding. */
5275 c
= readchar (remote_timeout
);
5277 repeat
= c
- ' ' + 3; /* Compute repeat count. */
5279 /* The character before ``*'' is repeated. */
5281 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
5283 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
5285 /* Make some more room in the buffer. */
5286 *sizeof_buf
+= repeat
;
5287 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
5291 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
5297 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
5301 if (bc
>= *sizeof_buf
- 1)
5303 /* Make some more room in the buffer. */
5305 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
5316 /* Read a packet from the remote machine, with error checking, and
5317 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
5318 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
5319 rather than timing out; this is used (in synchronous mode) to wait
5320 for a target that is is executing user code to stop. */
5321 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
5322 don't have to change all the calls to getpkt to deal with the
5323 return value, because at the moment I don't know what the right
5324 thing to do it for those. */
5332 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
5336 /* Read a packet from the remote machine, with error checking, and
5337 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
5338 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
5339 rather than timing out; this is used (in synchronous mode) to wait
5340 for a target that is is executing user code to stop. If FOREVER ==
5341 0, this function is allowed to time out gracefully and return an
5342 indication of this to the caller. Otherwise return the number
5345 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
5347 struct remote_state
*rs
= get_remote_state ();
5353 /* We're reading a new response. Make sure we don't look at a
5354 previously cached response. */
5355 rs
->cached_wait_status
= 0;
5357 strcpy (*buf
, "timeout");
5361 timeout
= watchdog
> 0 ? watchdog
: -1;
5365 timeout
= remote_timeout
;
5369 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
5371 /* This can loop forever if the remote side sends us characters
5372 continuously, but if it pauses, we'll get a zero from
5373 readchar because of timeout. Then we'll count that as a
5376 /* Note that we will only wait forever prior to the start of a
5377 packet. After that, we expect characters to arrive at a
5378 brisk pace. They should show up within remote_timeout
5383 c
= readchar (timeout
);
5385 if (c
== SERIAL_TIMEOUT
)
5387 if (forever
) /* Watchdog went off? Kill the target. */
5390 target_mourn_inferior ();
5391 error (_("Watchdog timeout has expired. Target detached."));
5394 fputs_filtered ("Timed out.\n", gdb_stdlog
);
5400 /* We've found the start of a packet, now collect the data. */
5402 val
= read_frame (buf
, sizeof_buf
);
5408 fprintf_unfiltered (gdb_stdlog
, "Packet received: ");
5409 fputstrn_unfiltered (*buf
, val
, 0, gdb_stdlog
);
5410 fprintf_unfiltered (gdb_stdlog
, "\n");
5413 /* Skip the ack char if we're in no-ack mode. */
5414 if (!rs
->noack_mode
)
5415 serial_write (remote_desc
, "+", 1);
5419 /* Try the whole thing again. */
5421 /* Skip the nack char if we're in no-ack mode. */
5422 if (!rs
->noack_mode
)
5423 serial_write (remote_desc
, "-", 1);
5426 /* We have tried hard enough, and just can't receive the packet.
5429 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
5431 /* Skip the ack char if we're in no-ack mode. */
5432 if (!rs
->noack_mode
)
5433 serial_write (remote_desc
, "+", 1);
5440 /* Unregister the file descriptor from the event loop. */
5441 if (target_is_async_p ())
5442 serial_async (remote_desc
, NULL
, 0);
5444 /* Use catch_errors so the user can quit from gdb even when we
5445 aren't on speaking terms with the remote system. */
5446 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
5448 /* Don't wait for it to die. I'm not really sure it matters whether
5449 we do or not. For the existing stubs, kill is a noop. */
5450 target_mourn_inferior ();
5454 remote_vkill (int pid
, struct remote_state
*rs
)
5456 if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
5459 /* Tell the remote target to detach. */
5460 sprintf (rs
->buf
, "vKill;%x", pid
);
5462 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5464 if (packet_ok (rs
->buf
,
5465 &remote_protocol_packets
[PACKET_vKill
]) == PACKET_OK
)
5467 else if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
5474 extended_remote_kill (void)
5477 int pid
= ptid_get_pid (inferior_ptid
);
5478 struct remote_state
*rs
= get_remote_state ();
5480 res
= remote_vkill (pid
, rs
);
5481 if (res
== -1 && !remote_multi_process_p (rs
))
5483 /* Don't try 'k' on a multi-process aware stub -- it has no way
5484 to specify the pid. */
5488 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5489 if (rs
->buf
[0] != 'O' || rs
->buf
[0] != 'K')
5492 /* Don't wait for it to die. I'm not really sure it matters whether
5493 we do or not. For the existing stubs, kill is a noop. */
5499 error (_("Can't kill process"));
5501 delete_inferior (pid
);
5502 target_mourn_inferior ();
5508 remote_mourn_1 (&remote_ops
);
5511 /* Worker function for remote_mourn. */
5513 remote_mourn_1 (struct target_ops
*target
)
5515 /* Get rid of all the inferiors and their threads we were
5517 discard_all_inferiors ();
5519 unpush_target (target
);
5520 generic_mourn_inferior ();
5524 select_new_thread_callback (struct thread_info
*th
, void* data
)
5526 if (!ptid_equal (th
->ptid
, minus_one_ptid
))
5528 switch_to_thread (th
->ptid
);
5529 printf_filtered (_("[Switching to %s]\n"),
5530 target_pid_to_str (inferior_ptid
));
5537 extended_remote_mourn_1 (struct target_ops
*target
)
5539 struct remote_state
*rs
= get_remote_state ();
5541 /* In case we got here due to an error, but we're going to stay
5543 rs
->waiting_for_stop_reply
= 0;
5545 /* Unlike "target remote", we do not want to unpush the target; then
5546 the next time the user says "run", we won't be connected. */
5548 if (have_inferiors ())
5550 extern void nullify_last_target_wait_ptid ();
5551 /* Multi-process case. The current process has exited, but
5552 there are other processes to debug. Switch to the first
5554 iterate_over_threads (select_new_thread_callback
, NULL
);
5555 nullify_last_target_wait_ptid ();
5559 struct remote_state
*rs
= get_remote_state ();
5561 /* Call common code to mark the inferior as not running. */
5562 generic_mourn_inferior ();
5563 if (!remote_multi_process_p (rs
))
5565 /* Check whether the target is running now - some remote stubs
5566 automatically restart after kill. */
5568 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5570 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
5572 /* Assume that the target has been restarted. Set inferior_ptid
5573 so that bits of core GDB realizes there's something here, e.g.,
5574 so that the user can say "kill" again. */
5575 inferior_ptid
= magic_null_ptid
;
5579 /* Mark this (still pushed) target as not executable until we
5581 target_mark_exited (target
);
5585 /* Always remove execution if this was the last process. */
5586 target_mark_exited (target
);
5591 extended_remote_mourn (void)
5593 extended_remote_mourn_1 (&extended_remote_ops
);
5597 extended_remote_run (char *args
)
5599 struct remote_state
*rs
= get_remote_state ();
5603 /* If the user has disabled vRun support, or we have detected that
5604 support is not available, do not try it. */
5605 if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
5608 strcpy (rs
->buf
, "vRun;");
5609 len
= strlen (rs
->buf
);
5611 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
5612 error (_("Remote file name too long for run packet"));
5613 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
, 0);
5615 gdb_assert (args
!= NULL
);
5618 struct cleanup
*back_to
;
5622 argv
= gdb_buildargv (args
);
5623 back_to
= make_cleanup ((void (*) (void *)) freeargv
, argv
);
5624 for (i
= 0; argv
[i
] != NULL
; i
++)
5626 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
5627 error (_("Argument list too long for run packet"));
5628 rs
->buf
[len
++] = ';';
5629 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
, 0);
5631 do_cleanups (back_to
);
5634 rs
->buf
[len
++] = '\0';
5637 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5639 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]) == PACKET_OK
)
5641 /* We have a wait response; we don't need it, though. All is well. */
5644 else if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
5645 /* It wasn't disabled before, but it is now. */
5649 if (remote_exec_file
[0] == '\0')
5650 error (_("Running the default executable on the remote target failed; "
5651 "try \"set remote exec-file\"?"));
5653 error (_("Running \"%s\" on the remote target failed"),
5658 /* In the extended protocol we want to be able to do things like
5659 "run" and have them basically work as expected. So we need
5660 a special create_inferior function. We support changing the
5661 executable file and the command line arguments, but not the
5665 extended_remote_create_inferior_1 (char *exec_file
, char *args
,
5666 char **env
, int from_tty
)
5668 /* If running asynchronously, register the target file descriptor
5669 with the event loop. */
5670 if (target_can_async_p ())
5671 target_async (inferior_event_handler
, 0);
5673 /* Now restart the remote server. */
5674 if (extended_remote_run (args
) == -1)
5676 /* vRun was not supported. Fail if we need it to do what the
5678 if (remote_exec_file
[0])
5679 error (_("Remote target does not support \"set remote exec-file\""));
5681 error (_("Remote target does not support \"set args\" or run <ARGS>"));
5683 /* Fall back to "R". */
5684 extended_remote_restart ();
5687 /* Clean up from the last time we ran, before we mark the target
5688 running again. This will mark breakpoints uninserted, and
5689 get_offsets may insert breakpoints. */
5690 init_thread_list ();
5691 init_wait_for_inferior ();
5693 /* Now mark the inferior as running before we do anything else. */
5694 inferior_ptid
= magic_null_ptid
;
5696 add_inferior (ptid_get_pid (inferior_ptid
));
5697 add_thread_silent (inferior_ptid
);
5699 target_mark_running (&extended_remote_ops
);
5701 /* Get updated offsets, if the stub uses qOffsets. */
5706 extended_remote_create_inferior (char *exec_file
, char *args
,
5707 char **env
, int from_tty
)
5709 extended_remote_create_inferior_1 (exec_file
, args
, env
, from_tty
);
5713 /* Insert a breakpoint. On targets that have software breakpoint
5714 support, we ask the remote target to do the work; on targets
5715 which don't, we insert a traditional memory breakpoint. */
5718 remote_insert_breakpoint (struct bp_target_info
*bp_tgt
)
5720 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
5721 If it succeeds, then set the support to PACKET_ENABLE. If it
5722 fails, and the user has explicitly requested the Z support then
5723 report an error, otherwise, mark it disabled and go on. */
5725 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
5727 CORE_ADDR addr
= bp_tgt
->placed_address
;
5728 struct remote_state
*rs
;
5732 gdbarch_breakpoint_from_pc (target_gdbarch
, &addr
, &bpsize
);
5734 rs
= get_remote_state ();
5740 addr
= (ULONGEST
) remote_address_masked (addr
);
5741 p
+= hexnumstr (p
, addr
);
5742 sprintf (p
, ",%d", bpsize
);
5745 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5747 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
5752 bp_tgt
->placed_address
= addr
;
5753 bp_tgt
->placed_size
= bpsize
;
5755 case PACKET_UNKNOWN
:
5760 return memory_insert_breakpoint (bp_tgt
);
5764 remote_remove_breakpoint (struct bp_target_info
*bp_tgt
)
5766 CORE_ADDR addr
= bp_tgt
->placed_address
;
5767 struct remote_state
*rs
= get_remote_state ();
5770 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
5778 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
5779 p
+= hexnumstr (p
, addr
);
5780 sprintf (p
, ",%d", bp_tgt
->placed_size
);
5783 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5785 return (rs
->buf
[0] == 'E');
5788 return memory_remove_breakpoint (bp_tgt
);
5792 watchpoint_to_Z_packet (int type
)
5797 return Z_PACKET_WRITE_WP
;
5800 return Z_PACKET_READ_WP
;
5803 return Z_PACKET_ACCESS_WP
;
5806 internal_error (__FILE__
, __LINE__
,
5807 _("hw_bp_to_z: bad watchpoint type %d"), type
);
5812 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
5814 struct remote_state
*rs
= get_remote_state ();
5816 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
5818 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
5821 sprintf (rs
->buf
, "Z%x,", packet
);
5822 p
= strchr (rs
->buf
, '\0');
5823 addr
= remote_address_masked (addr
);
5824 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5825 sprintf (p
, ",%x", len
);
5828 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5830 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
5833 case PACKET_UNKNOWN
:
5838 internal_error (__FILE__
, __LINE__
,
5839 _("remote_insert_watchpoint: reached end of function"));
5844 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
5846 struct remote_state
*rs
= get_remote_state ();
5848 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
5850 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
5853 sprintf (rs
->buf
, "z%x,", packet
);
5854 p
= strchr (rs
->buf
, '\0');
5855 addr
= remote_address_masked (addr
);
5856 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5857 sprintf (p
, ",%x", len
);
5859 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5861 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
5864 case PACKET_UNKNOWN
:
5869 internal_error (__FILE__
, __LINE__
,
5870 _("remote_remove_watchpoint: reached end of function"));
5874 int remote_hw_watchpoint_limit
= -1;
5875 int remote_hw_breakpoint_limit
= -1;
5878 remote_check_watch_resources (int type
, int cnt
, int ot
)
5880 if (type
== bp_hardware_breakpoint
)
5882 if (remote_hw_breakpoint_limit
== 0)
5884 else if (remote_hw_breakpoint_limit
< 0)
5886 else if (cnt
<= remote_hw_breakpoint_limit
)
5891 if (remote_hw_watchpoint_limit
== 0)
5893 else if (remote_hw_watchpoint_limit
< 0)
5897 else if (cnt
<= remote_hw_watchpoint_limit
)
5904 remote_stopped_by_watchpoint (void)
5906 return remote_stopped_by_watchpoint_p
;
5910 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
5913 if (remote_stopped_by_watchpoint ())
5915 *addr_p
= remote_watch_data_address
;
5924 remote_insert_hw_breakpoint (struct bp_target_info
*bp_tgt
)
5927 struct remote_state
*rs
;
5930 /* The length field should be set to the size of a breakpoint
5931 instruction, even though we aren't inserting one ourselves. */
5933 gdbarch_breakpoint_from_pc
5934 (target_gdbarch
, &bp_tgt
->placed_address
, &bp_tgt
->placed_size
);
5936 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
5939 rs
= get_remote_state ();
5946 addr
= remote_address_masked (bp_tgt
->placed_address
);
5947 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5948 sprintf (p
, ",%x", bp_tgt
->placed_size
);
5951 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5953 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
5956 case PACKET_UNKNOWN
:
5961 internal_error (__FILE__
, __LINE__
,
5962 _("remote_insert_hw_breakpoint: reached end of function"));
5967 remote_remove_hw_breakpoint (struct bp_target_info
*bp_tgt
)
5970 struct remote_state
*rs
= get_remote_state ();
5973 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
5980 addr
= remote_address_masked (bp_tgt
->placed_address
);
5981 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5982 sprintf (p
, ",%x", bp_tgt
->placed_size
);
5985 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5987 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
5990 case PACKET_UNKNOWN
:
5995 internal_error (__FILE__
, __LINE__
,
5996 _("remote_remove_hw_breakpoint: reached end of function"));
5999 /* Some targets are only capable of doing downloads, and afterwards
6000 they switch to the remote serial protocol. This function provides
6001 a clean way to get from the download target to the remote target.
6002 It's basically just a wrapper so that we don't have to expose any
6003 of the internal workings of remote.c.
6005 Prior to calling this routine, you should shutdown the current
6006 target code, else you will get the "A program is being debugged
6007 already..." message. Usually a call to pop_target() suffices. */
6010 push_remote_target (char *name
, int from_tty
)
6012 printf_filtered (_("Switching to remote protocol\n"));
6013 remote_open (name
, from_tty
);
6016 /* Table used by the crc32 function to calcuate the checksum. */
6018 static unsigned long crc32_table
[256] =
6021 static unsigned long
6022 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
6024 if (!crc32_table
[1])
6026 /* Initialize the CRC table and the decoding table. */
6030 for (i
= 0; i
< 256; i
++)
6032 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
6033 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
6040 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
6046 /* compare-sections command
6048 With no arguments, compares each loadable section in the exec bfd
6049 with the same memory range on the target, and reports mismatches.
6050 Useful for verifying the image on the target against the exec file.
6051 Depends on the target understanding the new "qCRC:" request. */
6053 /* FIXME: cagney/1999-10-26: This command should be broken down into a
6054 target method (target verify memory) and generic version of the
6055 actual command. This will allow other high-level code (especially
6056 generic_load()) to make use of this target functionality. */
6059 compare_sections_command (char *args
, int from_tty
)
6061 struct remote_state
*rs
= get_remote_state ();
6063 unsigned long host_crc
, target_crc
;
6064 extern bfd
*exec_bfd
;
6065 struct cleanup
*old_chain
;
6068 const char *sectname
;
6075 error (_("command cannot be used without an exec file"));
6076 if (!current_target
.to_shortname
||
6077 strcmp (current_target
.to_shortname
, "remote") != 0)
6078 error (_("command can only be used with remote target"));
6080 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
6082 if (!(s
->flags
& SEC_LOAD
))
6083 continue; /* skip non-loadable section */
6085 size
= bfd_get_section_size (s
);
6087 continue; /* skip zero-length section */
6089 sectname
= bfd_get_section_name (exec_bfd
, s
);
6090 if (args
&& strcmp (args
, sectname
) != 0)
6091 continue; /* not the section selected by user */
6093 matched
= 1; /* do this section */
6095 /* FIXME: assumes lma can fit into long. */
6096 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
6097 (long) lma
, (long) size
);
6100 /* Be clever; compute the host_crc before waiting for target
6102 sectdata
= xmalloc (size
);
6103 old_chain
= make_cleanup (xfree
, sectdata
);
6104 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
6105 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
6107 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6108 if (rs
->buf
[0] == 'E')
6109 error (_("target memory fault, section %s, range 0x%s -- 0x%s"),
6110 sectname
, paddr (lma
), paddr (lma
+ size
));
6111 if (rs
->buf
[0] != 'C')
6112 error (_("remote target does not support this operation"));
6114 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
6115 target_crc
= target_crc
* 16 + fromhex (*tmp
);
6117 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
6118 sectname
, paddr (lma
), paddr (lma
+ size
));
6119 if (host_crc
== target_crc
)
6120 printf_filtered ("matched.\n");
6123 printf_filtered ("MIS-MATCHED!\n");
6127 do_cleanups (old_chain
);
6130 warning (_("One or more sections of the remote executable does not match\n\
6131 the loaded file\n"));
6132 if (args
&& !matched
)
6133 printf_filtered (_("No loaded section named '%s'.\n"), args
);
6136 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
6137 into remote target. The number of bytes written to the remote
6138 target is returned, or -1 for error. */
6141 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
6142 const char *annex
, const gdb_byte
*writebuf
,
6143 ULONGEST offset
, LONGEST len
,
6144 struct packet_config
*packet
)
6149 struct remote_state
*rs
= get_remote_state ();
6150 int max_size
= get_memory_write_packet_size ();
6152 if (packet
->support
== PACKET_DISABLE
)
6155 /* Insert header. */
6156 i
= snprintf (rs
->buf
, max_size
,
6157 "qXfer:%s:write:%s:%s:",
6158 object_name
, annex
? annex
: "",
6159 phex_nz (offset
, sizeof offset
));
6160 max_size
-= (i
+ 1);
6162 /* Escape as much data as fits into rs->buf. */
6163 buf_len
= remote_escape_output
6164 (writebuf
, len
, (rs
->buf
+ i
), &max_size
, max_size
);
6166 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
6167 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
6168 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
6171 unpack_varlen_hex (rs
->buf
, &n
);
6175 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
6176 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
6177 number of bytes read is returned, or 0 for EOF, or -1 for error.
6178 The number of bytes read may be less than LEN without indicating an
6179 EOF. PACKET is checked and updated to indicate whether the remote
6180 target supports this object. */
6183 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
6185 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
6186 struct packet_config
*packet
)
6188 static char *finished_object
;
6189 static char *finished_annex
;
6190 static ULONGEST finished_offset
;
6192 struct remote_state
*rs
= get_remote_state ();
6193 unsigned int total
= 0;
6194 LONGEST i
, n
, packet_len
;
6196 if (packet
->support
== PACKET_DISABLE
)
6199 /* Check whether we've cached an end-of-object packet that matches
6201 if (finished_object
)
6203 if (strcmp (object_name
, finished_object
) == 0
6204 && strcmp (annex
? annex
: "", finished_annex
) == 0
6205 && offset
== finished_offset
)
6208 /* Otherwise, we're now reading something different. Discard
6210 xfree (finished_object
);
6211 xfree (finished_annex
);
6212 finished_object
= NULL
;
6213 finished_annex
= NULL
;
6216 /* Request only enough to fit in a single packet. The actual data
6217 may not, since we don't know how much of it will need to be escaped;
6218 the target is free to respond with slightly less data. We subtract
6219 five to account for the response type and the protocol frame. */
6220 n
= min (get_remote_packet_size () - 5, len
);
6221 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
6222 object_name
, annex
? annex
: "",
6223 phex_nz (offset
, sizeof offset
),
6224 phex_nz (n
, sizeof n
));
6225 i
= putpkt (rs
->buf
);
6230 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
6231 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
6234 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
6235 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
6237 /* 'm' means there is (or at least might be) more data after this
6238 batch. That does not make sense unless there's at least one byte
6239 of data in this reply. */
6240 if (rs
->buf
[0] == 'm' && packet_len
== 1)
6241 error (_("Remote qXfer reply contained no data."));
6243 /* Got some data. */
6244 i
= remote_unescape_input (rs
->buf
+ 1, packet_len
- 1, readbuf
, n
);
6246 /* 'l' is an EOF marker, possibly including a final block of data,
6247 or possibly empty. If we have the final block of a non-empty
6248 object, record this fact to bypass a subsequent partial read. */
6249 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
6251 finished_object
= xstrdup (object_name
);
6252 finished_annex
= xstrdup (annex
? annex
: "");
6253 finished_offset
= offset
+ i
;
6260 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
6261 const char *annex
, gdb_byte
*readbuf
,
6262 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
6264 struct remote_state
*rs
;
6269 set_general_thread (inferior_ptid
);
6271 rs
= get_remote_state ();
6273 /* Handle memory using the standard memory routines. */
6274 if (object
== TARGET_OBJECT_MEMORY
)
6279 /* If the remote target is connected but not running, we should
6280 pass this request down to a lower stratum (e.g. the executable
6282 if (!target_has_execution
)
6285 if (writebuf
!= NULL
)
6286 xfered
= remote_write_bytes (offset
, writebuf
, len
);
6288 xfered
= remote_read_bytes (offset
, readbuf
, len
);
6292 else if (xfered
== 0 && errno
== 0)
6298 /* Handle SPU memory using qxfer packets. */
6299 if (object
== TARGET_OBJECT_SPU
)
6302 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
6303 &remote_protocol_packets
6304 [PACKET_qXfer_spu_read
]);
6306 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
6307 &remote_protocol_packets
6308 [PACKET_qXfer_spu_write
]);
6311 /* Only handle flash writes. */
6312 if (writebuf
!= NULL
)
6318 case TARGET_OBJECT_FLASH
:
6319 xfered
= remote_flash_write (ops
, offset
, len
, writebuf
);
6323 else if (xfered
== 0 && errno
== 0)
6333 /* Map pre-existing objects onto letters. DO NOT do this for new
6334 objects!!! Instead specify new query packets. */
6337 case TARGET_OBJECT_AVR
:
6341 case TARGET_OBJECT_AUXV
:
6342 gdb_assert (annex
== NULL
);
6343 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
6344 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
6346 case TARGET_OBJECT_AVAILABLE_FEATURES
:
6347 return remote_read_qxfer
6348 (ops
, "features", annex
, readbuf
, offset
, len
,
6349 &remote_protocol_packets
[PACKET_qXfer_features
]);
6351 case TARGET_OBJECT_LIBRARIES
:
6352 return remote_read_qxfer
6353 (ops
, "libraries", annex
, readbuf
, offset
, len
,
6354 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
6356 case TARGET_OBJECT_MEMORY_MAP
:
6357 gdb_assert (annex
== NULL
);
6358 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
6359 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
6365 /* Note: a zero OFFSET and LEN can be used to query the minimum
6367 if (offset
== 0 && len
== 0)
6368 return (get_remote_packet_size ());
6369 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
6370 large enough let the caller deal with it. */
6371 if (len
< get_remote_packet_size ())
6373 len
= get_remote_packet_size ();
6375 /* Except for querying the minimum buffer size, target must be open. */
6377 error (_("remote query is only available after target open"));
6379 gdb_assert (annex
!= NULL
);
6380 gdb_assert (readbuf
!= NULL
);
6386 /* We used one buffer char for the remote protocol q command and
6387 another for the query type. As the remote protocol encapsulation
6388 uses 4 chars plus one extra in case we are debugging
6389 (remote_debug), we have PBUFZIZ - 7 left to pack the query
6392 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
6394 /* Bad caller may have sent forbidden characters. */
6395 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
6400 gdb_assert (annex
[i
] == '\0');
6402 i
= putpkt (rs
->buf
);
6406 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6407 strcpy ((char *) readbuf
, rs
->buf
);
6409 return strlen ((char *) readbuf
);
6413 remote_search_memory (struct target_ops
* ops
,
6414 CORE_ADDR start_addr
, ULONGEST search_space_len
,
6415 const gdb_byte
*pattern
, ULONGEST pattern_len
,
6416 CORE_ADDR
*found_addrp
)
6418 struct remote_state
*rs
= get_remote_state ();
6419 int max_size
= get_memory_write_packet_size ();
6420 struct packet_config
*packet
=
6421 &remote_protocol_packets
[PACKET_qSearch_memory
];
6422 /* number of packet bytes used to encode the pattern,
6423 this could be more than PATTERN_LEN due to escape characters */
6424 int escaped_pattern_len
;
6425 /* amount of pattern that was encodable in the packet */
6426 int used_pattern_len
;
6429 ULONGEST found_addr
;
6431 /* Don't go to the target if we don't have to.
6432 This is done before checking packet->support to avoid the possibility that
6433 a success for this edge case means the facility works in general. */
6434 if (pattern_len
> search_space_len
)
6436 if (pattern_len
== 0)
6438 *found_addrp
= start_addr
;
6442 /* If we already know the packet isn't supported, fall back to the simple
6443 way of searching memory. */
6445 if (packet
->support
== PACKET_DISABLE
)
6447 /* Target doesn't provided special support, fall back and use the
6448 standard support (copy memory and do the search here). */
6449 return simple_search_memory (ops
, start_addr
, search_space_len
,
6450 pattern
, pattern_len
, found_addrp
);
6453 /* Insert header. */
6454 i
= snprintf (rs
->buf
, max_size
,
6455 "qSearch:memory:%s;%s;",
6456 paddr_nz (start_addr
),
6457 phex_nz (search_space_len
, sizeof (search_space_len
)));
6458 max_size
-= (i
+ 1);
6460 /* Escape as much data as fits into rs->buf. */
6461 escaped_pattern_len
=
6462 remote_escape_output (pattern
, pattern_len
, (rs
->buf
+ i
),
6463 &used_pattern_len
, max_size
);
6465 /* Bail if the pattern is too large. */
6466 if (used_pattern_len
!= pattern_len
)
6467 error ("Pattern is too large to transmit to remote target.");
6469 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
6470 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
6471 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
6473 /* The request may not have worked because the command is not
6474 supported. If so, fall back to the simple way. */
6475 if (packet
->support
== PACKET_DISABLE
)
6477 return simple_search_memory (ops
, start_addr
, search_space_len
,
6478 pattern
, pattern_len
, found_addrp
);
6483 if (rs
->buf
[0] == '0')
6485 else if (rs
->buf
[0] == '1')
6488 if (rs
->buf
[1] != ',')
6489 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
6490 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
6491 *found_addrp
= found_addr
;
6494 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
6500 remote_rcmd (char *command
,
6501 struct ui_file
*outbuf
)
6503 struct remote_state
*rs
= get_remote_state ();
6507 error (_("remote rcmd is only available after target open"));
6509 /* Send a NULL command across as an empty command. */
6510 if (command
== NULL
)
6513 /* The query prefix. */
6514 strcpy (rs
->buf
, "qRcmd,");
6515 p
= strchr (rs
->buf
, '\0');
6517 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/) > get_remote_packet_size ())
6518 error (_("\"monitor\" command ``%s'' is too long."), command
);
6520 /* Encode the actual command. */
6521 bin2hex ((gdb_byte
*) command
, p
, 0);
6523 if (putpkt (rs
->buf
) < 0)
6524 error (_("Communication problem with target."));
6526 /* get/display the response */
6531 /* XXX - see also tracepoint.c:remote_get_noisy_reply(). */
6533 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6536 error (_("Target does not support this command."));
6537 if (buf
[0] == 'O' && buf
[1] != 'K')
6539 remote_console_output (buf
+ 1); /* 'O' message from stub. */
6542 if (strcmp (buf
, "OK") == 0)
6544 if (strlen (buf
) == 3 && buf
[0] == 'E'
6545 && isdigit (buf
[1]) && isdigit (buf
[2]))
6547 error (_("Protocol error with Rcmd"));
6549 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
6551 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
6552 fputc_unfiltered (c
, outbuf
);
6558 static VEC(mem_region_s
) *
6559 remote_memory_map (struct target_ops
*ops
)
6561 VEC(mem_region_s
) *result
= NULL
;
6562 char *text
= target_read_stralloc (¤t_target
,
6563 TARGET_OBJECT_MEMORY_MAP
, NULL
);
6567 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
6568 result
= parse_memory_map (text
);
6569 do_cleanups (back_to
);
6576 packet_command (char *args
, int from_tty
)
6578 struct remote_state
*rs
= get_remote_state ();
6581 error (_("command can only be used with remote target"));
6584 error (_("remote-packet command requires packet text as argument"));
6586 puts_filtered ("sending: ");
6587 print_packet (args
);
6588 puts_filtered ("\n");
6591 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6592 puts_filtered ("received: ");
6593 print_packet (rs
->buf
);
6594 puts_filtered ("\n");
6598 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
6600 static void display_thread_info (struct gdb_ext_thread_info
*info
);
6602 static void threadset_test_cmd (char *cmd
, int tty
);
6604 static void threadalive_test (char *cmd
, int tty
);
6606 static void threadlist_test_cmd (char *cmd
, int tty
);
6608 int get_and_display_threadinfo (threadref
*ref
);
6610 static void threadinfo_test_cmd (char *cmd
, int tty
);
6612 static int thread_display_step (threadref
*ref
, void *context
);
6614 static void threadlist_update_test_cmd (char *cmd
, int tty
);
6616 static void init_remote_threadtests (void);
6618 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
6621 threadset_test_cmd (char *cmd
, int tty
)
6623 int sample_thread
= SAMPLE_THREAD
;
6625 printf_filtered (_("Remote threadset test\n"));
6626 set_general_thread (sample_thread
);
6631 threadalive_test (char *cmd
, int tty
)
6633 int sample_thread
= SAMPLE_THREAD
;
6634 int pid
= ptid_get_pid (inferior_ptid
);
6635 ptid_t ptid
= ptid_build (pid
, 0, sample_thread
);
6637 if (remote_thread_alive (ptid
))
6638 printf_filtered ("PASS: Thread alive test\n");
6640 printf_filtered ("FAIL: Thread alive test\n");
6643 void output_threadid (char *title
, threadref
*ref
);
6646 output_threadid (char *title
, threadref
*ref
)
6650 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
6652 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
6656 threadlist_test_cmd (char *cmd
, int tty
)
6659 threadref nextthread
;
6660 int done
, result_count
;
6661 threadref threadlist
[3];
6663 printf_filtered ("Remote Threadlist test\n");
6664 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
6665 &result_count
, &threadlist
[0]))
6666 printf_filtered ("FAIL: threadlist test\n");
6669 threadref
*scan
= threadlist
;
6670 threadref
*limit
= scan
+ result_count
;
6672 while (scan
< limit
)
6673 output_threadid (" thread ", scan
++);
6678 display_thread_info (struct gdb_ext_thread_info
*info
)
6680 output_threadid ("Threadid: ", &info
->threadid
);
6681 printf_filtered ("Name: %s\n ", info
->shortname
);
6682 printf_filtered ("State: %s\n", info
->display
);
6683 printf_filtered ("other: %s\n\n", info
->more_display
);
6687 get_and_display_threadinfo (threadref
*ref
)
6691 struct gdb_ext_thread_info threadinfo
;
6693 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
6694 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
6695 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
6696 display_thread_info (&threadinfo
);
6701 threadinfo_test_cmd (char *cmd
, int tty
)
6703 int athread
= SAMPLE_THREAD
;
6707 int_to_threadref (&thread
, athread
);
6708 printf_filtered ("Remote Threadinfo test\n");
6709 if (!get_and_display_threadinfo (&thread
))
6710 printf_filtered ("FAIL cannot get thread info\n");
6714 thread_display_step (threadref
*ref
, void *context
)
6716 /* output_threadid(" threadstep ",ref); *//* simple test */
6717 return get_and_display_threadinfo (ref
);
6721 threadlist_update_test_cmd (char *cmd
, int tty
)
6723 printf_filtered ("Remote Threadlist update test\n");
6724 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
6728 init_remote_threadtests (void)
6730 add_com ("tlist", class_obscure
, threadlist_test_cmd
, _("\
6731 Fetch and print the remote list of thread identifiers, one pkt only"));
6732 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
6733 _("Fetch and display info about one thread"));
6734 add_com ("tset", class_obscure
, threadset_test_cmd
,
6735 _("Test setting to a different thread"));
6736 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
6737 _("Iterate through updating all remote thread info"));
6738 add_com ("talive", class_obscure
, threadalive_test
,
6739 _(" Remote thread alive test "));
6744 /* Convert a thread ID to a string. Returns the string in a static
6748 remote_pid_to_str (ptid_t ptid
)
6750 static char buf
[64];
6751 struct remote_state
*rs
= get_remote_state ();
6753 if (ptid_equal (magic_null_ptid
, ptid
))
6755 xsnprintf (buf
, sizeof buf
, "Thread <main>");
6758 else if (remote_multi_process_p (rs
)
6759 && ptid_get_tid (ptid
) != 0 && ptid_get_pid (ptid
) != 0)
6761 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
6762 ptid_get_pid (ptid
), ptid_get_tid (ptid
));
6765 else if (ptid_get_tid (ptid
) != 0)
6767 xsnprintf (buf
, sizeof buf
, "Thread %ld",
6768 ptid_get_tid (ptid
));
6772 return normal_pid_to_str (ptid
);
6775 /* Get the address of the thread local variable in OBJFILE which is
6776 stored at OFFSET within the thread local storage for thread PTID. */
6779 remote_get_thread_local_address (ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
6781 if (remote_protocol_packets
[PACKET_qGetTLSAddr
].support
!= PACKET_DISABLE
)
6783 struct remote_state
*rs
= get_remote_state ();
6785 char *endp
= rs
->buf
+ get_remote_packet_size ();
6786 enum packet_result result
;
6788 strcpy (p
, "qGetTLSAddr:");
6790 p
= write_ptid (p
, endp
, ptid
);
6792 p
+= hexnumstr (p
, offset
);
6794 p
+= hexnumstr (p
, lm
);
6798 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6799 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
6800 if (result
== PACKET_OK
)
6804 unpack_varlen_hex (rs
->buf
, &result
);
6807 else if (result
== PACKET_UNKNOWN
)
6808 throw_error (TLS_GENERIC_ERROR
,
6809 _("Remote target doesn't support qGetTLSAddr packet"));
6811 throw_error (TLS_GENERIC_ERROR
,
6812 _("Remote target failed to process qGetTLSAddr request"));
6815 throw_error (TLS_GENERIC_ERROR
,
6816 _("TLS not supported or disabled on this target"));
6821 /* Support for inferring a target description based on the current
6822 architecture and the size of a 'g' packet. While the 'g' packet
6823 can have any size (since optional registers can be left off the
6824 end), some sizes are easily recognizable given knowledge of the
6825 approximate architecture. */
6827 struct remote_g_packet_guess
6830 const struct target_desc
*tdesc
;
6832 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
6833 DEF_VEC_O(remote_g_packet_guess_s
);
6835 struct remote_g_packet_data
6837 VEC(remote_g_packet_guess_s
) *guesses
;
6840 static struct gdbarch_data
*remote_g_packet_data_handle
;
6843 remote_g_packet_data_init (struct obstack
*obstack
)
6845 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
6849 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
6850 const struct target_desc
*tdesc
)
6852 struct remote_g_packet_data
*data
6853 = gdbarch_data (gdbarch
, remote_g_packet_data_handle
);
6854 struct remote_g_packet_guess new_guess
, *guess
;
6857 gdb_assert (tdesc
!= NULL
);
6860 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
6862 if (guess
->bytes
== bytes
)
6863 internal_error (__FILE__
, __LINE__
,
6864 "Duplicate g packet description added for size %d",
6867 new_guess
.bytes
= bytes
;
6868 new_guess
.tdesc
= tdesc
;
6869 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
6872 static const struct target_desc
*
6873 remote_read_description (struct target_ops
*target
)
6875 struct remote_g_packet_data
*data
6876 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
6878 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
6880 struct remote_g_packet_guess
*guess
;
6882 int bytes
= send_g_packet ();
6885 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
6887 if (guess
->bytes
== bytes
)
6888 return guess
->tdesc
;
6890 /* We discard the g packet. A minor optimization would be to
6891 hold on to it, and fill the register cache once we have selected
6892 an architecture, but it's too tricky to do safely. */
6898 /* Remote file transfer support. This is host-initiated I/O, not
6899 target-initiated; for target-initiated, see remote-fileio.c. */
6901 /* If *LEFT is at least the length of STRING, copy STRING to
6902 *BUFFER, update *BUFFER to point to the new end of the buffer, and
6903 decrease *LEFT. Otherwise raise an error. */
6906 remote_buffer_add_string (char **buffer
, int *left
, char *string
)
6908 int len
= strlen (string
);
6911 error (_("Packet too long for target."));
6913 memcpy (*buffer
, string
, len
);
6917 /* NUL-terminate the buffer as a convenience, if there is
6923 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
6924 *BUFFER, update *BUFFER to point to the new end of the buffer, and
6925 decrease *LEFT. Otherwise raise an error. */
6928 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
6931 if (2 * len
> *left
)
6932 error (_("Packet too long for target."));
6934 bin2hex (bytes
, *buffer
, len
);
6938 /* NUL-terminate the buffer as a convenience, if there is
6944 /* If *LEFT is large enough, convert VALUE to hex and add it to
6945 *BUFFER, update *BUFFER to point to the new end of the buffer, and
6946 decrease *LEFT. Otherwise raise an error. */
6949 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
6951 int len
= hexnumlen (value
);
6954 error (_("Packet too long for target."));
6956 hexnumstr (*buffer
, value
);
6960 /* NUL-terminate the buffer as a convenience, if there is
6966 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
6967 value, *REMOTE_ERRNO to the remote error number or zero if none
6968 was included, and *ATTACHMENT to point to the start of the annex
6969 if any. The length of the packet isn't needed here; there may
6970 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
6972 Return 0 if the packet could be parsed, -1 if it could not. If
6973 -1 is returned, the other variables may not be initialized. */
6976 remote_hostio_parse_result (char *buffer
, int *retcode
,
6977 int *remote_errno
, char **attachment
)
6984 if (buffer
[0] != 'F')
6988 *retcode
= strtol (&buffer
[1], &p
, 16);
6989 if (errno
!= 0 || p
== &buffer
[1])
6992 /* Check for ",errno". */
6996 *remote_errno
= strtol (p
+ 1, &p2
, 16);
6997 if (errno
!= 0 || p
+ 1 == p2
)
7002 /* Check for ";attachment". If there is no attachment, the
7003 packet should end here. */
7006 *attachment
= p
+ 1;
7009 else if (*p
== '\0')
7015 /* Send a prepared I/O packet to the target and read its response.
7016 The prepared packet is in the global RS->BUF before this function
7017 is called, and the answer is there when we return.
7019 COMMAND_BYTES is the length of the request to send, which may include
7020 binary data. WHICH_PACKET is the packet configuration to check
7021 before attempting a packet. If an error occurs, *REMOTE_ERRNO
7022 is set to the error number and -1 is returned. Otherwise the value
7023 returned by the function is returned.
7025 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
7026 attachment is expected; an error will be reported if there's a
7027 mismatch. If one is found, *ATTACHMENT will be set to point into
7028 the packet buffer and *ATTACHMENT_LEN will be set to the
7029 attachment's length. */
7032 remote_hostio_send_command (int command_bytes
, int which_packet
,
7033 int *remote_errno
, char **attachment
,
7034 int *attachment_len
)
7036 struct remote_state
*rs
= get_remote_state ();
7037 int ret
, bytes_read
;
7038 char *attachment_tmp
;
7041 || remote_protocol_packets
[which_packet
].support
== PACKET_DISABLE
)
7043 *remote_errno
= FILEIO_ENOSYS
;
7047 putpkt_binary (rs
->buf
, command_bytes
);
7048 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
7050 /* If it timed out, something is wrong. Don't try to parse the
7054 *remote_errno
= FILEIO_EINVAL
;
7058 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
7061 *remote_errno
= FILEIO_EINVAL
;
7063 case PACKET_UNKNOWN
:
7064 *remote_errno
= FILEIO_ENOSYS
;
7070 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
7073 *remote_errno
= FILEIO_EINVAL
;
7077 /* Make sure we saw an attachment if and only if we expected one. */
7078 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
7079 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
7081 *remote_errno
= FILEIO_EINVAL
;
7085 /* If an attachment was found, it must point into the packet buffer;
7086 work out how many bytes there were. */
7087 if (attachment_tmp
!= NULL
)
7089 *attachment
= attachment_tmp
;
7090 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
7096 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
7097 remote file descriptor, or -1 if an error occurs (and set
7101 remote_hostio_open (const char *filename
, int flags
, int mode
,
7104 struct remote_state
*rs
= get_remote_state ();
7106 int left
= get_remote_packet_size () - 1;
7108 remote_buffer_add_string (&p
, &left
, "vFile:open:");
7110 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
7112 remote_buffer_add_string (&p
, &left
, ",");
7114 remote_buffer_add_int (&p
, &left
, flags
);
7115 remote_buffer_add_string (&p
, &left
, ",");
7117 remote_buffer_add_int (&p
, &left
, mode
);
7119 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
7120 remote_errno
, NULL
, NULL
);
7123 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
7124 Return the number of bytes written, or -1 if an error occurs (and
7125 set *REMOTE_ERRNO). */
7128 remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
7129 ULONGEST offset
, int *remote_errno
)
7131 struct remote_state
*rs
= get_remote_state ();
7133 int left
= get_remote_packet_size ();
7136 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
7138 remote_buffer_add_int (&p
, &left
, fd
);
7139 remote_buffer_add_string (&p
, &left
, ",");
7141 remote_buffer_add_int (&p
, &left
, offset
);
7142 remote_buffer_add_string (&p
, &left
, ",");
7144 p
+= remote_escape_output (write_buf
, len
, p
, &out_len
,
7145 get_remote_packet_size () - (p
- rs
->buf
));
7147 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
7148 remote_errno
, NULL
, NULL
);
7151 /* Read up to LEN bytes FD on the remote target into READ_BUF
7152 Return the number of bytes read, or -1 if an error occurs (and
7153 set *REMOTE_ERRNO). */
7156 remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
7157 ULONGEST offset
, int *remote_errno
)
7159 struct remote_state
*rs
= get_remote_state ();
7162 int left
= get_remote_packet_size ();
7163 int ret
, attachment_len
;
7166 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
7168 remote_buffer_add_int (&p
, &left
, fd
);
7169 remote_buffer_add_string (&p
, &left
, ",");
7171 remote_buffer_add_int (&p
, &left
, len
);
7172 remote_buffer_add_string (&p
, &left
, ",");
7174 remote_buffer_add_int (&p
, &left
, offset
);
7176 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
7177 remote_errno
, &attachment
,
7183 read_len
= remote_unescape_input (attachment
, attachment_len
,
7185 if (read_len
!= ret
)
7186 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
7191 /* Close FD on the remote target. Return 0, or -1 if an error occurs
7192 (and set *REMOTE_ERRNO). */
7195 remote_hostio_close (int fd
, int *remote_errno
)
7197 struct remote_state
*rs
= get_remote_state ();
7199 int left
= get_remote_packet_size () - 1;
7201 remote_buffer_add_string (&p
, &left
, "vFile:close:");
7203 remote_buffer_add_int (&p
, &left
, fd
);
7205 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
7206 remote_errno
, NULL
, NULL
);
7209 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
7210 occurs (and set *REMOTE_ERRNO). */
7213 remote_hostio_unlink (const char *filename
, int *remote_errno
)
7215 struct remote_state
*rs
= get_remote_state ();
7217 int left
= get_remote_packet_size () - 1;
7219 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
7221 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
7224 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
7225 remote_errno
, NULL
, NULL
);
7229 remote_fileio_errno_to_host (int errnum
)
7253 case FILEIO_ENOTDIR
:
7273 case FILEIO_ENAMETOOLONG
:
7274 return ENAMETOOLONG
;
7280 remote_hostio_error (int errnum
)
7282 int host_error
= remote_fileio_errno_to_host (errnum
);
7284 if (host_error
== -1)
7285 error (_("Unknown remote I/O error %d"), errnum
);
7287 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
7291 fclose_cleanup (void *file
)
7297 remote_hostio_close_cleanup (void *opaque
)
7299 int fd
= *(int *) opaque
;
7302 remote_hostio_close (fd
, &remote_errno
);
7307 remote_bfd_iovec_open (struct bfd
*abfd
, void *open_closure
)
7309 const char *filename
= bfd_get_filename (abfd
);
7310 int fd
, remote_errno
;
7313 gdb_assert (remote_filename_p (filename
));
7315 fd
= remote_hostio_open (filename
+ 7, FILEIO_O_RDONLY
, 0, &remote_errno
);
7318 errno
= remote_fileio_errno_to_host (remote_errno
);
7319 bfd_set_error (bfd_error_system_call
);
7323 stream
= xmalloc (sizeof (int));
7329 remote_bfd_iovec_close (struct bfd
*abfd
, void *stream
)
7331 int fd
= *(int *)stream
;
7336 /* Ignore errors on close; these may happen if the remote
7337 connection was already torn down. */
7338 remote_hostio_close (fd
, &remote_errno
);
7344 remote_bfd_iovec_pread (struct bfd
*abfd
, void *stream
, void *buf
,
7345 file_ptr nbytes
, file_ptr offset
)
7347 int fd
= *(int *)stream
;
7349 file_ptr pos
, bytes
;
7352 while (nbytes
> pos
)
7354 bytes
= remote_hostio_pread (fd
, (char *)buf
+ pos
, nbytes
- pos
,
7355 offset
+ pos
, &remote_errno
);
7357 /* Success, but no bytes, means end-of-file. */
7361 errno
= remote_fileio_errno_to_host (remote_errno
);
7362 bfd_set_error (bfd_error_system_call
);
7373 remote_bfd_iovec_stat (struct bfd
*abfd
, void *stream
, struct stat
*sb
)
7375 /* FIXME: We should probably implement remote_hostio_stat. */
7376 sb
->st_size
= INT_MAX
;
7381 remote_filename_p (const char *filename
)
7383 return strncmp (filename
, "remote:", 7) == 0;
7387 remote_bfd_open (const char *remote_file
, const char *target
)
7389 return bfd_openr_iovec (remote_file
, target
,
7390 remote_bfd_iovec_open
, NULL
,
7391 remote_bfd_iovec_pread
,
7392 remote_bfd_iovec_close
,
7393 remote_bfd_iovec_stat
);
7397 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
7399 struct cleanup
*back_to
, *close_cleanup
;
7400 int retcode
, fd
, remote_errno
, bytes
, io_size
;
7403 int bytes_in_buffer
;
7408 error (_("command can only be used with remote target"));
7410 file
= fopen (local_file
, "rb");
7412 perror_with_name (local_file
);
7413 back_to
= make_cleanup (fclose_cleanup
, file
);
7415 fd
= remote_hostio_open (remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
7417 0700, &remote_errno
);
7419 remote_hostio_error (remote_errno
);
7421 /* Send up to this many bytes at once. They won't all fit in the
7422 remote packet limit, so we'll transfer slightly fewer. */
7423 io_size
= get_remote_packet_size ();
7424 buffer
= xmalloc (io_size
);
7425 make_cleanup (xfree
, buffer
);
7427 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
7429 bytes_in_buffer
= 0;
7432 while (bytes_in_buffer
|| !saw_eof
)
7436 bytes
= fread (buffer
+ bytes_in_buffer
, 1, io_size
- bytes_in_buffer
,
7441 error (_("Error reading %s."), local_file
);
7444 /* EOF. Unless there is something still in the
7445 buffer from the last iteration, we are done. */
7447 if (bytes_in_buffer
== 0)
7455 bytes
+= bytes_in_buffer
;
7456 bytes_in_buffer
= 0;
7458 retcode
= remote_hostio_pwrite (fd
, buffer
, bytes
, offset
, &remote_errno
);
7461 remote_hostio_error (remote_errno
);
7462 else if (retcode
== 0)
7463 error (_("Remote write of %d bytes returned 0!"), bytes
);
7464 else if (retcode
< bytes
)
7466 /* Short write. Save the rest of the read data for the next
7468 bytes_in_buffer
= bytes
- retcode
;
7469 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
7475 discard_cleanups (close_cleanup
);
7476 if (remote_hostio_close (fd
, &remote_errno
))
7477 remote_hostio_error (remote_errno
);
7480 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
7481 do_cleanups (back_to
);
7485 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
7487 struct cleanup
*back_to
, *close_cleanup
;
7488 int retcode
, fd
, remote_errno
, bytes
, io_size
;
7494 error (_("command can only be used with remote target"));
7496 fd
= remote_hostio_open (remote_file
, FILEIO_O_RDONLY
, 0, &remote_errno
);
7498 remote_hostio_error (remote_errno
);
7500 file
= fopen (local_file
, "wb");
7502 perror_with_name (local_file
);
7503 back_to
= make_cleanup (fclose_cleanup
, file
);
7505 /* Send up to this many bytes at once. They won't all fit in the
7506 remote packet limit, so we'll transfer slightly fewer. */
7507 io_size
= get_remote_packet_size ();
7508 buffer
= xmalloc (io_size
);
7509 make_cleanup (xfree
, buffer
);
7511 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
7516 bytes
= remote_hostio_pread (fd
, buffer
, io_size
, offset
, &remote_errno
);
7518 /* Success, but no bytes, means end-of-file. */
7521 remote_hostio_error (remote_errno
);
7525 bytes
= fwrite (buffer
, 1, bytes
, file
);
7527 perror_with_name (local_file
);
7530 discard_cleanups (close_cleanup
);
7531 if (remote_hostio_close (fd
, &remote_errno
))
7532 remote_hostio_error (remote_errno
);
7535 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
7536 do_cleanups (back_to
);
7540 remote_file_delete (const char *remote_file
, int from_tty
)
7542 int retcode
, remote_errno
;
7545 error (_("command can only be used with remote target"));
7547 retcode
= remote_hostio_unlink (remote_file
, &remote_errno
);
7549 remote_hostio_error (remote_errno
);
7552 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
7556 remote_put_command (char *args
, int from_tty
)
7558 struct cleanup
*back_to
;
7562 error_no_arg (_("file to put"));
7564 argv
= gdb_buildargv (args
);
7565 back_to
= make_cleanup_freeargv (argv
);
7566 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
7567 error (_("Invalid parameters to remote put"));
7569 remote_file_put (argv
[0], argv
[1], from_tty
);
7571 do_cleanups (back_to
);
7575 remote_get_command (char *args
, int from_tty
)
7577 struct cleanup
*back_to
;
7581 error_no_arg (_("file to get"));
7583 argv
= gdb_buildargv (args
);
7584 back_to
= make_cleanup_freeargv (argv
);
7585 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
7586 error (_("Invalid parameters to remote get"));
7588 remote_file_get (argv
[0], argv
[1], from_tty
);
7590 do_cleanups (back_to
);
7594 remote_delete_command (char *args
, int from_tty
)
7596 struct cleanup
*back_to
;
7600 error_no_arg (_("file to delete"));
7602 argv
= gdb_buildargv (args
);
7603 back_to
= make_cleanup_freeargv (argv
);
7604 if (argv
[0] == NULL
|| argv
[1] != NULL
)
7605 error (_("Invalid parameters to remote delete"));
7607 remote_file_delete (argv
[0], from_tty
);
7609 do_cleanups (back_to
);
7613 remote_command (char *args
, int from_tty
)
7615 help_list (remote_cmdlist
, "remote ", -1, gdb_stdout
);
7619 init_remote_ops (void)
7621 remote_ops
.to_shortname
= "remote";
7622 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
7624 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
7625 Specify the serial device it is connected to\n\
7626 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
7627 remote_ops
.to_open
= remote_open
;
7628 remote_ops
.to_close
= remote_close
;
7629 remote_ops
.to_detach
= remote_detach
;
7630 remote_ops
.to_disconnect
= remote_disconnect
;
7631 remote_ops
.to_resume
= remote_resume
;
7632 remote_ops
.to_wait
= remote_wait
;
7633 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
7634 remote_ops
.to_store_registers
= remote_store_registers
;
7635 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
7636 remote_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
7637 remote_ops
.to_files_info
= remote_files_info
;
7638 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
7639 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
7640 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
7641 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
7642 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
7643 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
7644 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
7645 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
7646 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
7647 remote_ops
.to_kill
= remote_kill
;
7648 remote_ops
.to_load
= generic_load
;
7649 remote_ops
.to_mourn_inferior
= remote_mourn
;
7650 remote_ops
.to_thread_alive
= remote_thread_alive
;
7651 remote_ops
.to_find_new_threads
= remote_threads_info
;
7652 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
7653 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
7654 remote_ops
.to_stop
= remote_stop
;
7655 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
7656 remote_ops
.to_rcmd
= remote_rcmd
;
7657 remote_ops
.to_log_command
= serial_log_command
;
7658 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
7659 remote_ops
.to_stratum
= process_stratum
;
7660 remote_ops
.to_has_all_memory
= 1;
7661 remote_ops
.to_has_memory
= 1;
7662 remote_ops
.to_has_stack
= 1;
7663 remote_ops
.to_has_registers
= 1;
7664 remote_ops
.to_has_execution
= 1;
7665 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
7666 remote_ops
.to_magic
= OPS_MAGIC
;
7667 remote_ops
.to_memory_map
= remote_memory_map
;
7668 remote_ops
.to_flash_erase
= remote_flash_erase
;
7669 remote_ops
.to_flash_done
= remote_flash_done
;
7670 remote_ops
.to_read_description
= remote_read_description
;
7671 remote_ops
.to_search_memory
= remote_search_memory
;
7672 remote_ops
.to_can_async_p
= remote_can_async_p
;
7673 remote_ops
.to_is_async_p
= remote_is_async_p
;
7674 remote_ops
.to_async
= remote_async
;
7675 remote_ops
.to_async_mask
= remote_async_mask
;
7676 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
7677 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
7680 /* Set up the extended remote vector by making a copy of the standard
7681 remote vector and adding to it. */
7684 init_extended_remote_ops (void)
7686 extended_remote_ops
= remote_ops
;
7688 extended_remote_ops
.to_shortname
= "extended-remote";
7689 extended_remote_ops
.to_longname
=
7690 "Extended remote serial target in gdb-specific protocol";
7691 extended_remote_ops
.to_doc
=
7692 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
7693 Specify the serial device it is connected to (e.g. /dev/ttya).";
7694 extended_remote_ops
.to_open
= extended_remote_open
;
7695 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
7696 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
7697 extended_remote_ops
.to_detach
= extended_remote_detach
;
7698 extended_remote_ops
.to_attach
= extended_remote_attach
;
7699 extended_remote_ops
.to_kill
= extended_remote_kill
;
7703 remote_can_async_p (void)
7705 if (!target_async_permitted
)
7706 /* We only enable async when the user specifically asks for it. */
7709 /* We're async whenever the serial device is. */
7710 return remote_async_mask_value
&& serial_can_async_p (remote_desc
);
7714 remote_is_async_p (void)
7716 if (!target_async_permitted
)
7717 /* We only enable async when the user specifically asks for it. */
7720 /* We're async whenever the serial device is. */
7721 return remote_async_mask_value
&& serial_is_async_p (remote_desc
);
7724 /* Pass the SERIAL event on and up to the client. One day this code
7725 will be able to delay notifying the client of an event until the
7726 point where an entire packet has been received. */
7728 static void (*async_client_callback
) (enum inferior_event_type event_type
,
7730 static void *async_client_context
;
7731 static serial_event_ftype remote_async_serial_handler
;
7734 remote_async_serial_handler (struct serial
*scb
, void *context
)
7736 /* Don't propogate error information up to the client. Instead let
7737 the client find out about the error by querying the target. */
7738 async_client_callback (INF_REG_EVENT
, async_client_context
);
7742 remote_async (void (*callback
) (enum inferior_event_type event_type
,
7743 void *context
), void *context
)
7745 if (remote_async_mask_value
== 0)
7746 internal_error (__FILE__
, __LINE__
,
7747 _("Calling remote_async when async is masked"));
7749 if (callback
!= NULL
)
7751 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
7752 async_client_callback
= callback
;
7753 async_client_context
= context
;
7756 serial_async (remote_desc
, NULL
, NULL
);
7760 remote_async_mask (int new_mask
)
7762 int curr_mask
= remote_async_mask_value
;
7763 remote_async_mask_value
= new_mask
;
7768 set_remote_cmd (char *args
, int from_tty
)
7770 help_list (remote_set_cmdlist
, "set remote ", -1, gdb_stdout
);
7774 show_remote_cmd (char *args
, int from_tty
)
7776 /* We can't just use cmd_show_list here, because we want to skip
7777 the redundant "show remote Z-packet" and the legacy aliases. */
7778 struct cleanup
*showlist_chain
;
7779 struct cmd_list_element
*list
= remote_show_cmdlist
;
7781 showlist_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "showlist");
7782 for (; list
!= NULL
; list
= list
->next
)
7783 if (strcmp (list
->name
, "Z-packet") == 0)
7785 else if (list
->type
== not_set_cmd
)
7786 /* Alias commands are exactly like the original, except they
7787 don't have the normal type. */
7791 struct cleanup
*option_chain
7792 = make_cleanup_ui_out_tuple_begin_end (uiout
, "option");
7793 ui_out_field_string (uiout
, "name", list
->name
);
7794 ui_out_text (uiout
, ": ");
7795 if (list
->type
== show_cmd
)
7796 do_setshow_command ((char *) NULL
, from_tty
, list
);
7798 cmd_func (list
, NULL
, from_tty
);
7799 /* Close the tuple. */
7800 do_cleanups (option_chain
);
7803 /* Close the tuple. */
7804 do_cleanups (showlist_chain
);
7808 /* Function to be called whenever a new objfile (shlib) is detected. */
7810 remote_new_objfile (struct objfile
*objfile
)
7812 if (remote_desc
!= 0) /* Have a remote connection. */
7813 remote_check_symbols (objfile
);
7817 _initialize_remote (void)
7819 struct remote_state
*rs
;
7821 /* architecture specific data */
7822 remote_gdbarch_data_handle
=
7823 gdbarch_data_register_post_init (init_remote_state
);
7824 remote_g_packet_data_handle
=
7825 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
7827 /* Initialize the per-target state. At the moment there is only one
7828 of these, not one per target. Only one target is active at a
7829 time. The default buffer size is unimportant; it will be expanded
7830 whenever a larger buffer is needed. */
7831 rs
= get_remote_state_raw ();
7833 rs
->buf
= xmalloc (rs
->buf_size
);
7836 add_target (&remote_ops
);
7838 init_extended_remote_ops ();
7839 add_target (&extended_remote_ops
);
7841 /* Hook into new objfile notification. */
7842 observer_attach_new_objfile (remote_new_objfile
);
7844 /* Set up signal handlers. */
7845 sigint_remote_token
=
7846 create_async_signal_handler (async_remote_interrupt
, NULL
);
7847 sigint_remote_twice_token
=
7848 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
7851 init_remote_threadtests ();
7854 /* set/show remote ... */
7856 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
7857 Remote protocol specific variables\n\
7858 Configure various remote-protocol specific variables such as\n\
7859 the packets being used"),
7860 &remote_set_cmdlist
, "set remote ",
7861 0 /* allow-unknown */, &setlist
);
7862 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
7863 Remote protocol specific variables\n\
7864 Configure various remote-protocol specific variables such as\n\
7865 the packets being used"),
7866 &remote_show_cmdlist
, "show remote ",
7867 0 /* allow-unknown */, &showlist
);
7869 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
7870 Compare section data on target to the exec file.\n\
7871 Argument is a single section name (default: all loaded sections)."),
7874 add_cmd ("packet", class_maintenance
, packet_command
, _("\
7875 Send an arbitrary packet to a remote target.\n\
7876 maintenance packet TEXT\n\
7877 If GDB is talking to an inferior via the GDB serial protocol, then\n\
7878 this command sends the string TEXT to the inferior, and displays the\n\
7879 response packet. GDB supplies the initial `$' character, and the\n\
7880 terminating `#' character and checksum."),
7883 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
7884 Set whether to send break if interrupted."), _("\
7885 Show whether to send break if interrupted."), _("\
7886 If set, a break, instead of a cntrl-c, is sent to the remote target."),
7887 NULL
, NULL
, /* FIXME: i18n: Whether to send break if interrupted is %s. */
7888 &setlist
, &showlist
);
7890 /* Install commands for configuring memory read/write packets. */
7892 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
7893 Set the maximum number of bytes per memory write packet (deprecated)."),
7895 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
7896 Show the maximum number of bytes per memory write packet (deprecated)."),
7898 add_cmd ("memory-write-packet-size", no_class
,
7899 set_memory_write_packet_size
, _("\
7900 Set the maximum number of bytes per memory-write packet.\n\
7901 Specify the number of bytes in a packet or 0 (zero) for the\n\
7902 default packet size. The actual limit is further reduced\n\
7903 dependent on the target. Specify ``fixed'' to disable the\n\
7904 further restriction and ``limit'' to enable that restriction."),
7905 &remote_set_cmdlist
);
7906 add_cmd ("memory-read-packet-size", no_class
,
7907 set_memory_read_packet_size
, _("\
7908 Set the maximum number of bytes per memory-read packet.\n\
7909 Specify the number of bytes in a packet or 0 (zero) for the\n\
7910 default packet size. The actual limit is further reduced\n\
7911 dependent on the target. Specify ``fixed'' to disable the\n\
7912 further restriction and ``limit'' to enable that restriction."),
7913 &remote_set_cmdlist
);
7914 add_cmd ("memory-write-packet-size", no_class
,
7915 show_memory_write_packet_size
,
7916 _("Show the maximum number of bytes per memory-write packet."),
7917 &remote_show_cmdlist
);
7918 add_cmd ("memory-read-packet-size", no_class
,
7919 show_memory_read_packet_size
,
7920 _("Show the maximum number of bytes per memory-read packet."),
7921 &remote_show_cmdlist
);
7923 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
7924 &remote_hw_watchpoint_limit
, _("\
7925 Set the maximum number of target hardware watchpoints."), _("\
7926 Show the maximum number of target hardware watchpoints."), _("\
7927 Specify a negative limit for unlimited."),
7928 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
7929 &remote_set_cmdlist
, &remote_show_cmdlist
);
7930 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
7931 &remote_hw_breakpoint_limit
, _("\
7932 Set the maximum number of target hardware breakpoints."), _("\
7933 Show the maximum number of target hardware breakpoints."), _("\
7934 Specify a negative limit for unlimited."),
7935 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
7936 &remote_set_cmdlist
, &remote_show_cmdlist
);
7938 add_setshow_integer_cmd ("remoteaddresssize", class_obscure
,
7939 &remote_address_size
, _("\
7940 Set the maximum size of the address (in bits) in a memory packet."), _("\
7941 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
7943 NULL
, /* FIXME: i18n: */
7944 &setlist
, &showlist
);
7946 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
7947 "X", "binary-download", 1);
7949 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
7950 "vCont", "verbose-resume", 0);
7952 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
7953 "QPassSignals", "pass-signals", 0);
7955 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
7956 "qSymbol", "symbol-lookup", 0);
7958 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
7959 "P", "set-register", 1);
7961 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
7962 "p", "fetch-register", 1);
7964 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
7965 "Z0", "software-breakpoint", 0);
7967 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
7968 "Z1", "hardware-breakpoint", 0);
7970 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
7971 "Z2", "write-watchpoint", 0);
7973 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
7974 "Z3", "read-watchpoint", 0);
7976 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
7977 "Z4", "access-watchpoint", 0);
7979 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
7980 "qXfer:auxv:read", "read-aux-vector", 0);
7982 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
7983 "qXfer:features:read", "target-features", 0);
7985 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
7986 "qXfer:libraries:read", "library-info", 0);
7988 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
7989 "qXfer:memory-map:read", "memory-map", 0);
7991 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
7992 "qXfer:spu:read", "read-spu-object", 0);
7994 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
7995 "qXfer:spu:write", "write-spu-object", 0);
7997 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
7998 "qGetTLSAddr", "get-thread-local-storage-address",
8001 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
8002 "qSupported", "supported-packets", 0);
8004 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
8005 "qSearch:memory", "search-memory", 0);
8007 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
8008 "vFile:open", "hostio-open", 0);
8010 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
8011 "vFile:pread", "hostio-pread", 0);
8013 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
8014 "vFile:pwrite", "hostio-pwrite", 0);
8016 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
8017 "vFile:close", "hostio-close", 0);
8019 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
8020 "vFile:unlink", "hostio-unlink", 0);
8022 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
8023 "vAttach", "attach", 0);
8025 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
8028 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
8029 "QStartNoAckMode", "noack", 0);
8031 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
8032 "vKill", "kill", 0);
8034 /* Keep the old ``set remote Z-packet ...'' working. Each individual
8035 Z sub-packet has its own set and show commands, but users may
8036 have sets to this variable in their .gdbinit files (or in their
8038 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
8039 &remote_Z_packet_detect
, _("\
8040 Set use of remote protocol `Z' packets"), _("\
8041 Show use of remote protocol `Z' packets "), _("\
8042 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
8044 set_remote_protocol_Z_packet_cmd
,
8045 show_remote_protocol_Z_packet_cmd
, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
8046 &remote_set_cmdlist
, &remote_show_cmdlist
);
8048 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
8049 Manipulate files on the remote system\n\
8050 Transfer files to and from the remote target system."),
8051 &remote_cmdlist
, "remote ",
8052 0 /* allow-unknown */, &cmdlist
);
8054 add_cmd ("put", class_files
, remote_put_command
,
8055 _("Copy a local file to the remote system."),
8058 add_cmd ("get", class_files
, remote_get_command
,
8059 _("Copy a remote file to the local system."),
8062 add_cmd ("delete", class_files
, remote_delete_command
,
8063 _("Delete a remote file."),
8066 remote_exec_file
= xstrdup ("");
8067 add_setshow_string_noescape_cmd ("exec-file", class_files
,
8068 &remote_exec_file
, _("\
8069 Set the remote pathname for \"run\""), _("\
8070 Show the remote pathname for \"run\""), NULL
, NULL
, NULL
,
8071 &remote_set_cmdlist
, &remote_show_cmdlist
);
8073 /* Eventually initialize fileio. See fileio.c */
8074 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
8076 /* Take advantage of the fact that the LWP field is not used, to tag
8077 special ptids with it set to != 0. */
8078 magic_null_ptid
= ptid_build (42000, 1, -1);
8079 not_sent_ptid
= ptid_build (42000, 1, -2);
8080 any_thread_ptid
= ptid_build (42000, 1, 0);