1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
4 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
24 /* See the GDB User Guide for details of the GDB remote protocol. */
27 #include "gdb_string.h"
34 /*#include "terminal.h" */
37 #include "gdb-stabs.h"
38 #include "gdbthread.h"
42 #include "gdb_assert.h"
47 #include <sys/types.h>
50 #include "event-loop.h"
51 #include "event-top.h"
57 #include "gdbcore.h" /* for exec_bfd */
59 #include "remote-fileio.h"
61 /* Prototypes for local functions */
62 static void cleanup_sigint_signal_handler (void *dummy
);
63 static void initialize_sigint_signal_handler (void);
64 static int getpkt_sane (char *buf
, long sizeof_buf
, int forever
);
66 static void handle_remote_sigint (int);
67 static void handle_remote_sigint_twice (int);
68 static void async_remote_interrupt (gdb_client_data
);
69 void async_remote_interrupt_twice (gdb_client_data
);
71 static void build_remote_gdbarch_data (void);
73 static void remote_files_info (struct target_ops
*ignore
);
75 static int remote_xfer_memory (CORE_ADDR memaddr
, char *myaddr
,
76 int len
, int should_write
,
77 struct mem_attrib
*attrib
,
78 struct target_ops
*target
);
80 static void remote_prepare_to_store (void);
82 static void remote_fetch_registers (int regno
);
84 static void remote_resume (ptid_t ptid
, int step
,
85 enum target_signal siggnal
);
86 static void remote_async_resume (ptid_t ptid
, int step
,
87 enum target_signal siggnal
);
88 static int remote_start_remote (struct ui_out
*uiout
, void *dummy
);
90 static void remote_open (char *name
, int from_tty
);
91 static void remote_async_open (char *name
, int from_tty
);
93 static void extended_remote_open (char *name
, int from_tty
);
94 static void extended_remote_async_open (char *name
, int from_tty
);
96 static void remote_open_1 (char *, int, struct target_ops
*, int extended_p
,
99 static void remote_close (int quitting
);
101 static void remote_store_registers (int regno
);
103 static void remote_mourn (void);
104 static void remote_async_mourn (void);
106 static void extended_remote_restart (void);
108 static void extended_remote_mourn (void);
110 static void extended_remote_create_inferior (char *, char *, char **);
111 static void extended_remote_async_create_inferior (char *, char *, char **);
113 static void remote_mourn_1 (struct target_ops
*);
115 static void remote_send (char *buf
, long sizeof_buf
);
117 static int readchar (int timeout
);
119 static ptid_t
remote_wait (ptid_t ptid
,
120 struct target_waitstatus
*status
);
121 static ptid_t
remote_async_wait (ptid_t ptid
,
122 struct target_waitstatus
*status
);
124 static void remote_kill (void);
125 static void remote_async_kill (void);
127 static int tohex (int nib
);
129 static void remote_detach (char *args
, int from_tty
);
131 static void remote_interrupt (int signo
);
133 static void remote_interrupt_twice (int signo
);
135 static void interrupt_query (void);
137 static void set_thread (int, int);
139 static int remote_thread_alive (ptid_t
);
141 static void get_offsets (void);
143 static long read_frame (char *buf
, long sizeof_buf
);
145 static int remote_insert_breakpoint (CORE_ADDR
, char *);
147 static int remote_remove_breakpoint (CORE_ADDR
, char *);
149 static int hexnumlen (ULONGEST num
);
151 static void init_remote_ops (void);
153 static void init_extended_remote_ops (void);
155 static void remote_stop (void);
157 static int ishex (int ch
, int *val
);
159 static int stubhex (int ch
);
161 static int hexnumstr (char *, ULONGEST
);
163 static int hexnumnstr (char *, ULONGEST
, int);
165 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
167 static void print_packet (char *);
169 static unsigned long crc32 (unsigned char *, int, unsigned int);
171 static void compare_sections_command (char *, int);
173 static void packet_command (char *, int);
175 static int stub_unpack_int (char *buff
, int fieldlength
);
177 static ptid_t
remote_current_thread (ptid_t oldptid
);
179 static void remote_find_new_threads (void);
181 static void record_currthread (int currthread
);
183 static int fromhex (int a
);
185 static int hex2bin (const char *hex
, char *bin
, int count
);
187 static int bin2hex (const char *bin
, char *hex
, int count
);
189 static int putpkt_binary (char *buf
, int cnt
);
191 static void check_binary_download (CORE_ADDR addr
);
193 struct packet_config
;
195 static void show_packet_config_cmd (struct packet_config
*config
);
197 static void update_packet_config (struct packet_config
*config
);
199 void _initialize_remote (void);
201 /* Description of the remote protocol. Strictly speaking, when the
202 target is open()ed, remote.c should create a per-target description
203 of the remote protocol using that target's architecture.
204 Unfortunately, the target stack doesn't include local state. For
205 the moment keep the information in the target's architecture
210 long offset
; /* Offset into G packet. */
211 long regnum
; /* GDB's internal register number. */
212 LONGEST pnum
; /* Remote protocol register number. */
213 int in_g_packet
; /* Always part of G packet. */
214 /* long size in bytes; == DEPRECATED_REGISTER_RAW_SIZE (regnum); at present. */
215 /* char *name; == REGISTER_NAME (regnum); at present. */
220 /* Description of the remote protocol registers. */
221 long sizeof_g_packet
;
223 /* Description of the remote protocol registers indexed by REGNUM
224 (making an array of NUM_REGS + NUM_PSEUDO_REGS in size). */
225 struct packet_reg
*regs
;
227 /* This is the size (in chars) of the first response to the ``g''
228 packet. It is used as a heuristic when determining the maximum
229 size of memory-read and memory-write packets. A target will
230 typically only reserve a buffer large enough to hold the ``g''
231 packet. The size does not include packet overhead (headers and
233 long actual_register_packet_size
;
235 /* This is the maximum size (in chars) of a non read/write packet.
236 It is also used as a cap on the size of read/write packets. */
237 long remote_packet_size
;
241 /* Handle for retreving the remote protocol data from gdbarch. */
242 static struct gdbarch_data
*remote_gdbarch_data_handle
;
244 static struct remote_state
*
245 get_remote_state (void)
247 return gdbarch_data (current_gdbarch
, remote_gdbarch_data_handle
);
251 init_remote_state (struct gdbarch
*gdbarch
)
254 struct remote_state
*rs
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_state
);
256 if (DEPRECATED_REGISTER_BYTES
!= 0)
257 rs
->sizeof_g_packet
= DEPRECATED_REGISTER_BYTES
;
259 rs
->sizeof_g_packet
= 0;
261 /* Assume a 1:1 regnum<->pnum table. */
262 rs
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
, NUM_REGS
+ NUM_PSEUDO_REGS
,
264 for (regnum
= 0; regnum
< NUM_REGS
+ NUM_PSEUDO_REGS
; regnum
++)
266 struct packet_reg
*r
= &rs
->regs
[regnum
];
269 r
->offset
= DEPRECATED_REGISTER_BYTE (regnum
);
270 r
->in_g_packet
= (regnum
< NUM_REGS
);
271 /* ...name = REGISTER_NAME (regnum); */
273 /* Compute packet size by accumulating the size of all registers. */
274 if (DEPRECATED_REGISTER_BYTES
== 0)
275 rs
->sizeof_g_packet
+= register_size (current_gdbarch
, regnum
);
278 /* Default maximum number of characters in a packet body. Many
279 remote stubs have a hardwired buffer size of 400 bytes
280 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
281 as the maximum packet-size to ensure that the packet and an extra
282 NUL character can always fit in the buffer. This stops GDB
283 trashing stubs that try to squeeze an extra NUL into what is
284 already a full buffer (As of 1999-12-04 that was most stubs. */
285 rs
->remote_packet_size
= 400 - 1;
287 /* Should rs->sizeof_g_packet needs more space than the
288 default, adjust the size accordingly. Remember that each byte is
289 encoded as two characters. 32 is the overhead for the packet
290 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
291 (``$NN:G...#NN'') is a better guess, the below has been padded a
293 if (rs
->sizeof_g_packet
> ((rs
->remote_packet_size
- 32) / 2))
294 rs
->remote_packet_size
= (rs
->sizeof_g_packet
* 2 + 32);
296 /* This one is filled in when a ``g'' packet is received. */
297 rs
->actual_register_packet_size
= 0;
302 static struct packet_reg
*
303 packet_reg_from_regnum (struct remote_state
*rs
, long regnum
)
305 if (regnum
< 0 && regnum
>= NUM_REGS
+ NUM_PSEUDO_REGS
)
309 struct packet_reg
*r
= &rs
->regs
[regnum
];
310 gdb_assert (r
->regnum
== regnum
);
315 static struct packet_reg
*
316 packet_reg_from_pnum (struct remote_state
*rs
, LONGEST pnum
)
319 for (i
= 0; i
< NUM_REGS
+ NUM_PSEUDO_REGS
; i
++)
321 struct packet_reg
*r
= &rs
->regs
[i
];
328 /* FIXME: graces/2002-08-08: These variables should eventually be
329 bound to an instance of the target object (as in gdbarch-tdep()),
330 when such a thing exists. */
332 /* This is set to the data address of the access causing the target
333 to stop for a watchpoint. */
334 static CORE_ADDR remote_watch_data_address
;
336 /* This is non-zero if taregt stopped for a watchpoint. */
337 static int remote_stopped_by_watchpoint_p
;
340 static struct target_ops remote_ops
;
342 static struct target_ops extended_remote_ops
;
344 /* Temporary target ops. Just like the remote_ops and
345 extended_remote_ops, but with asynchronous support. */
346 static struct target_ops remote_async_ops
;
348 static struct target_ops extended_async_remote_ops
;
350 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
351 ``forever'' still use the normal timeout mechanism. This is
352 currently used by the ASYNC code to guarentee that target reads
353 during the initial connect always time-out. Once getpkt has been
354 modified to return a timeout indication and, in turn
355 remote_wait()/wait_for_inferior() have gained a timeout parameter
357 static int wait_forever_enabled_p
= 1;
360 /* This variable chooses whether to send a ^C or a break when the user
361 requests program interruption. Although ^C is usually what remote
362 systems expect, and that is the default here, sometimes a break is
363 preferable instead. */
365 static int remote_break
;
367 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
368 remote_open knows that we don't have a file open when the program
370 static struct serial
*remote_desc
= NULL
;
372 /* This variable sets the number of bits in an address that are to be
373 sent in a memory ("M" or "m") packet. Normally, after stripping
374 leading zeros, the entire address would be sent. This variable
375 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
376 initial implementation of remote.c restricted the address sent in
377 memory packets to ``host::sizeof long'' bytes - (typically 32
378 bits). Consequently, for 64 bit targets, the upper 32 bits of an
379 address was never sent. Since fixing this bug may cause a break in
380 some remote targets this variable is principly provided to
381 facilitate backward compatibility. */
383 static int remote_address_size
;
385 /* Tempoary to track who currently owns the terminal. See
386 target_async_terminal_* for more details. */
388 static int remote_async_terminal_ours_p
;
391 /* User configurable variables for the number of characters in a
392 memory read/write packet. MIN ((rs->remote_packet_size),
393 rs->sizeof_g_packet) is the default. Some targets need smaller
394 values (fifo overruns, et.al.) and some users need larger values
395 (speed up transfers). The variables ``preferred_*'' (the user
396 request), ``current_*'' (what was actually set) and ``forced_*''
397 (Positive - a soft limit, negative - a hard limit). */
399 struct memory_packet_config
406 /* Compute the current size of a read/write packet. Since this makes
407 use of ``actual_register_packet_size'' the computation is dynamic. */
410 get_memory_packet_size (struct memory_packet_config
*config
)
412 struct remote_state
*rs
= get_remote_state ();
413 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
414 law?) that some hosts don't cope very well with large alloca()
415 calls. Eventually the alloca() code will be replaced by calls to
416 xmalloc() and make_cleanups() allowing this restriction to either
417 be lifted or removed. */
418 #ifndef MAX_REMOTE_PACKET_SIZE
419 #define MAX_REMOTE_PACKET_SIZE 16384
421 /* NOTE: 16 is just chosen at random. */
422 #ifndef MIN_REMOTE_PACKET_SIZE
423 #define MIN_REMOTE_PACKET_SIZE 16
428 if (config
->size
<= 0)
429 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
431 what_they_get
= config
->size
;
435 what_they_get
= (rs
->remote_packet_size
);
436 /* Limit the packet to the size specified by the user. */
438 && what_they_get
> config
->size
)
439 what_they_get
= config
->size
;
440 /* Limit it to the size of the targets ``g'' response. */
441 if ((rs
->actual_register_packet_size
) > 0
442 && what_they_get
> (rs
->actual_register_packet_size
))
443 what_they_get
= (rs
->actual_register_packet_size
);
445 if (what_they_get
> MAX_REMOTE_PACKET_SIZE
)
446 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
447 if (what_they_get
< MIN_REMOTE_PACKET_SIZE
)
448 what_they_get
= MIN_REMOTE_PACKET_SIZE
;
449 return what_they_get
;
452 /* Update the size of a read/write packet. If they user wants
453 something really big then do a sanity check. */
456 set_memory_packet_size (char *args
, struct memory_packet_config
*config
)
458 int fixed_p
= config
->fixed_p
;
459 long size
= config
->size
;
461 error ("Argument required (integer, `fixed' or `limited').");
462 else if (strcmp (args
, "hard") == 0
463 || strcmp (args
, "fixed") == 0)
465 else if (strcmp (args
, "soft") == 0
466 || strcmp (args
, "limit") == 0)
471 size
= strtoul (args
, &end
, 0);
473 error ("Invalid %s (bad syntax).", config
->name
);
475 /* Instead of explicitly capping the size of a packet to
476 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
477 instead allowed to set the size to something arbitrarily
479 if (size
> MAX_REMOTE_PACKET_SIZE
)
480 error ("Invalid %s (too large).", config
->name
);
484 if (fixed_p
&& !config
->fixed_p
)
486 if (! query ("The target may not be able to correctly handle a %s\n"
487 "of %ld bytes. Change the packet size? ",
489 error ("Packet size not changed.");
491 /* Update the config. */
492 config
->fixed_p
= fixed_p
;
497 show_memory_packet_size (struct memory_packet_config
*config
)
499 printf_filtered ("The %s is %ld. ", config
->name
, config
->size
);
501 printf_filtered ("Packets are fixed at %ld bytes.\n",
502 get_memory_packet_size (config
));
504 printf_filtered ("Packets are limited to %ld bytes.\n",
505 get_memory_packet_size (config
));
508 static struct memory_packet_config memory_write_packet_config
=
510 "memory-write-packet-size",
514 set_memory_write_packet_size (char *args
, int from_tty
)
516 set_memory_packet_size (args
, &memory_write_packet_config
);
520 show_memory_write_packet_size (char *args
, int from_tty
)
522 show_memory_packet_size (&memory_write_packet_config
);
526 get_memory_write_packet_size (void)
528 return get_memory_packet_size (&memory_write_packet_config
);
531 static struct memory_packet_config memory_read_packet_config
=
533 "memory-read-packet-size",
537 set_memory_read_packet_size (char *args
, int from_tty
)
539 set_memory_packet_size (args
, &memory_read_packet_config
);
543 show_memory_read_packet_size (char *args
, int from_tty
)
545 show_memory_packet_size (&memory_read_packet_config
);
549 get_memory_read_packet_size (void)
551 struct remote_state
*rs
= get_remote_state ();
552 long size
= get_memory_packet_size (&memory_read_packet_config
);
553 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
554 extra buffer size argument before the memory read size can be
555 increased beyond (rs->remote_packet_size). */
556 if (size
> (rs
->remote_packet_size
))
557 size
= (rs
->remote_packet_size
);
562 /* Generic configuration support for packets the stub optionally
563 supports. Allows the user to specify the use of the packet as well
564 as allowing GDB to auto-detect support in the remote stub. */
568 PACKET_SUPPORT_UNKNOWN
= 0,
577 enum auto_boolean detect
;
578 enum packet_support support
;
581 /* Analyze a packet's return value and update the packet config
592 update_packet_config (struct packet_config
*config
)
594 switch (config
->detect
)
596 case AUTO_BOOLEAN_TRUE
:
597 config
->support
= PACKET_ENABLE
;
599 case AUTO_BOOLEAN_FALSE
:
600 config
->support
= PACKET_DISABLE
;
602 case AUTO_BOOLEAN_AUTO
:
603 config
->support
= PACKET_SUPPORT_UNKNOWN
;
609 show_packet_config_cmd (struct packet_config
*config
)
611 char *support
= "internal-error";
612 switch (config
->support
)
618 support
= "disabled";
620 case PACKET_SUPPORT_UNKNOWN
:
624 switch (config
->detect
)
626 case AUTO_BOOLEAN_AUTO
:
627 printf_filtered ("Support for remote protocol `%s' (%s) packet is auto-detected, currently %s.\n",
628 config
->name
, config
->title
, support
);
630 case AUTO_BOOLEAN_TRUE
:
631 case AUTO_BOOLEAN_FALSE
:
632 printf_filtered ("Support for remote protocol `%s' (%s) packet is currently %s.\n",
633 config
->name
, config
->title
, support
);
639 add_packet_config_cmd (struct packet_config
*config
,
642 cmd_sfunc_ftype
*set_func
,
643 cmd_sfunc_ftype
*show_func
,
644 struct cmd_list_element
**set_remote_list
,
645 struct cmd_list_element
**show_remote_list
,
648 struct cmd_list_element
*set_cmd
;
649 struct cmd_list_element
*show_cmd
;
654 config
->title
= title
;
655 config
->detect
= AUTO_BOOLEAN_AUTO
;
656 config
->support
= PACKET_SUPPORT_UNKNOWN
;
657 xasprintf (&set_doc
, "Set use of remote protocol `%s' (%s) packet",
659 xasprintf (&show_doc
, "Show current use of remote protocol `%s' (%s) packet",
661 /* set/show TITLE-packet {auto,on,off} */
662 xasprintf (&cmd_name
, "%s-packet", title
);
663 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
664 &config
->detect
, set_doc
, show_doc
,
666 set_remote_list
, show_remote_list
);
667 /* set/show remote NAME-packet {auto,on,off} -- legacy */
671 xasprintf (&legacy_name
, "%s-packet", name
);
672 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
674 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
679 static enum packet_result
680 packet_ok (const char *buf
, struct packet_config
*config
)
684 /* The stub recognized the packet request. Check that the
685 operation succeeded. */
686 switch (config
->support
)
688 case PACKET_SUPPORT_UNKNOWN
:
690 fprintf_unfiltered (gdb_stdlog
,
691 "Packet %s (%s) is supported\n",
692 config
->name
, config
->title
);
693 config
->support
= PACKET_ENABLE
;
696 internal_error (__FILE__
, __LINE__
,
697 "packet_ok: attempt to use a disabled packet");
702 if (buf
[0] == 'O' && buf
[1] == 'K' && buf
[2] == '\0')
703 /* "OK" - definitly OK. */
706 && isxdigit (buf
[1]) && isxdigit (buf
[2])
708 /* "Enn" - definitly an error. */
710 /* The packet may or may not be OK. Just assume it is */
715 /* The stub does not support the packet. */
716 switch (config
->support
)
719 if (config
->detect
== AUTO_BOOLEAN_AUTO
)
720 /* If the stub previously indicated that the packet was
721 supported then there is a protocol error.. */
722 error ("Protocol error: %s (%s) conflicting enabled responses.",
723 config
->name
, config
->title
);
725 /* The user set it wrong. */
726 error ("Enabled packet %s (%s) not recognized by stub",
727 config
->name
, config
->title
);
729 case PACKET_SUPPORT_UNKNOWN
:
731 fprintf_unfiltered (gdb_stdlog
,
732 "Packet %s (%s) is NOT supported\n",
733 config
->name
, config
->title
);
734 config
->support
= PACKET_DISABLE
;
739 return PACKET_UNKNOWN
;
743 /* Should we try the 'vCont' (descriptive resume) request? */
744 static struct packet_config remote_protocol_vcont
;
747 set_remote_protocol_vcont_packet_cmd (char *args
, int from_tty
,
748 struct cmd_list_element
*c
)
750 update_packet_config (&remote_protocol_vcont
);
754 show_remote_protocol_vcont_packet_cmd (char *args
, int from_tty
,
755 struct cmd_list_element
*c
)
757 show_packet_config_cmd (&remote_protocol_vcont
);
760 /* Should we try the 'qSymbol' (target symbol lookup service) request? */
761 static struct packet_config remote_protocol_qSymbol
;
764 set_remote_protocol_qSymbol_packet_cmd (char *args
, int from_tty
,
765 struct cmd_list_element
*c
)
767 update_packet_config (&remote_protocol_qSymbol
);
771 show_remote_protocol_qSymbol_packet_cmd (char *args
, int from_tty
,
772 struct cmd_list_element
*c
)
774 show_packet_config_cmd (&remote_protocol_qSymbol
);
777 /* Should we try the 'P' (set register) request? */
779 static struct packet_config remote_protocol_P
;
782 set_remote_protocol_P_packet_cmd (char *args
, int from_tty
,
783 struct cmd_list_element
*c
)
785 update_packet_config (&remote_protocol_P
);
789 show_remote_protocol_P_packet_cmd (char *args
, int from_tty
,
790 struct cmd_list_element
*c
)
792 show_packet_config_cmd (&remote_protocol_P
);
795 /* Should we try one of the 'Z' requests? */
799 Z_PACKET_SOFTWARE_BP
,
800 Z_PACKET_HARDWARE_BP
,
807 static struct packet_config remote_protocol_Z
[NR_Z_PACKET_TYPES
];
809 /* FIXME: Instead of having all these boiler plate functions, the
810 command callback should include a context argument. */
813 set_remote_protocol_Z_software_bp_packet_cmd (char *args
, int from_tty
,
814 struct cmd_list_element
*c
)
816 update_packet_config (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]);
820 show_remote_protocol_Z_software_bp_packet_cmd (char *args
, int from_tty
,
821 struct cmd_list_element
*c
)
823 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]);
827 set_remote_protocol_Z_hardware_bp_packet_cmd (char *args
, int from_tty
,
828 struct cmd_list_element
*c
)
830 update_packet_config (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]);
834 show_remote_protocol_Z_hardware_bp_packet_cmd (char *args
, int from_tty
,
835 struct cmd_list_element
*c
)
837 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]);
841 set_remote_protocol_Z_write_wp_packet_cmd (char *args
, int from_tty
,
842 struct cmd_list_element
*c
)
844 update_packet_config (&remote_protocol_Z
[Z_PACKET_WRITE_WP
]);
848 show_remote_protocol_Z_write_wp_packet_cmd (char *args
, int from_tty
,
849 struct cmd_list_element
*c
)
851 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_WRITE_WP
]);
855 set_remote_protocol_Z_read_wp_packet_cmd (char *args
, int from_tty
,
856 struct cmd_list_element
*c
)
858 update_packet_config (&remote_protocol_Z
[Z_PACKET_READ_WP
]);
862 show_remote_protocol_Z_read_wp_packet_cmd (char *args
, int from_tty
,
863 struct cmd_list_element
*c
)
865 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_READ_WP
]);
869 set_remote_protocol_Z_access_wp_packet_cmd (char *args
, int from_tty
,
870 struct cmd_list_element
*c
)
872 update_packet_config (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
]);
876 show_remote_protocol_Z_access_wp_packet_cmd (char *args
, int from_tty
,
877 struct cmd_list_element
*c
)
879 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
]);
882 /* For compatibility with older distributions. Provide a ``set remote
883 Z-packet ...'' command that updates all the Z packet types. */
885 static enum auto_boolean remote_Z_packet_detect
;
888 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
889 struct cmd_list_element
*c
)
892 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
894 remote_protocol_Z
[i
].detect
= remote_Z_packet_detect
;
895 update_packet_config (&remote_protocol_Z
[i
]);
900 show_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
901 struct cmd_list_element
*c
)
904 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
906 show_packet_config_cmd (&remote_protocol_Z
[i
]);
910 /* Should we try the 'X' (remote binary download) packet?
912 This variable (available to the user via "set remote X-packet")
913 dictates whether downloads are sent in binary (via the 'X' packet).
914 We assume that the stub can, and attempt to do it. This will be
915 cleared if the stub does not understand it. This switch is still
916 needed, though in cases when the packet is supported in the stub,
917 but the connection does not allow it (i.e., 7-bit serial connection
920 static struct packet_config remote_protocol_binary_download
;
922 /* Should we try the 'ThreadInfo' query packet?
924 This variable (NOT available to the user: auto-detect only!)
925 determines whether GDB will use the new, simpler "ThreadInfo"
926 query or the older, more complex syntax for thread queries.
927 This is an auto-detect variable (set to true at each connect,
928 and set to false when the target fails to recognize it). */
930 static int use_threadinfo_query
;
931 static int use_threadextra_query
;
934 set_remote_protocol_binary_download_cmd (char *args
,
936 struct cmd_list_element
*c
)
938 update_packet_config (&remote_protocol_binary_download
);
942 show_remote_protocol_binary_download_cmd (char *args
, int from_tty
,
943 struct cmd_list_element
*c
)
945 show_packet_config_cmd (&remote_protocol_binary_download
);
948 /* Should we try the 'qPart:auxv' (target auxiliary vector read) request? */
949 static struct packet_config remote_protocol_qPart_auxv
;
952 set_remote_protocol_qPart_auxv_packet_cmd (char *args
, int from_tty
,
953 struct cmd_list_element
*c
)
955 update_packet_config (&remote_protocol_qPart_auxv
);
959 show_remote_protocol_qPart_auxv_packet_cmd (char *args
, int from_tty
,
960 struct cmd_list_element
*c
)
962 show_packet_config_cmd (&remote_protocol_qPart_auxv
);
966 /* Tokens for use by the asynchronous signal handlers for SIGINT */
967 static void *sigint_remote_twice_token
;
968 static void *sigint_remote_token
;
970 /* These are pointers to hook functions that may be set in order to
971 modify resume/wait behavior for a particular architecture. */
973 void (*deprecated_target_resume_hook
) (void);
974 void (*deprecated_target_wait_loop_hook
) (void);
978 /* These are the threads which we last sent to the remote system.
979 -1 for all or -2 for not sent yet. */
980 static int general_thread
;
981 static int continue_thread
;
983 /* Call this function as a result of
984 1) A halt indication (T packet) containing a thread id
985 2) A direct query of currthread
986 3) Successful execution of set thread
990 record_currthread (int currthread
)
992 general_thread
= currthread
;
994 /* If this is a new thread, add it to GDB's thread list.
995 If we leave it up to WFI to do this, bad things will happen. */
996 if (!in_thread_list (pid_to_ptid (currthread
)))
998 add_thread (pid_to_ptid (currthread
));
999 ui_out_text (uiout
, "[New ");
1000 ui_out_text (uiout
, target_pid_to_str (pid_to_ptid (currthread
)));
1001 ui_out_text (uiout
, "]\n");
1005 #define MAGIC_NULL_PID 42000
1008 set_thread (int th
, int gen
)
1010 struct remote_state
*rs
= get_remote_state ();
1011 char *buf
= alloca (rs
->remote_packet_size
);
1012 int state
= gen
? general_thread
: continue_thread
;
1018 buf
[1] = gen
? 'g' : 'c';
1019 if (th
== MAGIC_NULL_PID
)
1025 sprintf (&buf
[2], "-%x", -th
);
1027 sprintf (&buf
[2], "%x", th
);
1029 getpkt (buf
, (rs
->remote_packet_size
), 0);
1031 general_thread
= th
;
1033 continue_thread
= th
;
1036 /* Return nonzero if the thread TH is still alive on the remote system. */
1039 remote_thread_alive (ptid_t ptid
)
1041 int tid
= PIDGET (ptid
);
1045 sprintf (buf
, "T-%08x", -tid
);
1047 sprintf (buf
, "T%08x", tid
);
1049 getpkt (buf
, sizeof (buf
), 0);
1050 return (buf
[0] == 'O' && buf
[1] == 'K');
1053 /* About these extended threadlist and threadinfo packets. They are
1054 variable length packets but, the fields within them are often fixed
1055 length. They are redundent enough to send over UDP as is the
1056 remote protocol in general. There is a matching unit test module
1059 #define OPAQUETHREADBYTES 8
1061 /* a 64 bit opaque identifier */
1062 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
1064 /* WARNING: This threadref data structure comes from the remote O.S., libstub
1065 protocol encoding, and remote.c. it is not particularly changable */
1067 /* Right now, the internal structure is int. We want it to be bigger.
1071 typedef int gdb_threadref
; /* internal GDB thread reference */
1073 /* gdb_ext_thread_info is an internal GDB data structure which is
1074 equivalint to the reply of the remote threadinfo packet */
1076 struct gdb_ext_thread_info
1078 threadref threadid
; /* External form of thread reference */
1079 int active
; /* Has state interesting to GDB? , regs, stack */
1080 char display
[256]; /* Brief state display, name, blocked/syspended */
1081 char shortname
[32]; /* To be used to name threads */
1082 char more_display
[256]; /* Long info, statistics, queue depth, whatever */
1085 /* The volume of remote transfers can be limited by submitting
1086 a mask containing bits specifying the desired information.
1087 Use a union of these values as the 'selection' parameter to
1088 get_thread_info. FIXME: Make these TAG names more thread specific.
1091 #define TAG_THREADID 1
1092 #define TAG_EXISTS 2
1093 #define TAG_DISPLAY 4
1094 #define TAG_THREADNAME 8
1095 #define TAG_MOREDISPLAY 16
1097 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES*2)
1099 char *unpack_varlen_hex (char *buff
, ULONGEST
*result
);
1101 static char *unpack_nibble (char *buf
, int *val
);
1103 static char *pack_nibble (char *buf
, int nibble
);
1105 static char *pack_hex_byte (char *pkt
, int /*unsigned char */ byte
);
1107 static char *unpack_byte (char *buf
, int *value
);
1109 static char *pack_int (char *buf
, int value
);
1111 static char *unpack_int (char *buf
, int *value
);
1113 static char *unpack_string (char *src
, char *dest
, int length
);
1115 static char *pack_threadid (char *pkt
, threadref
* id
);
1117 static char *unpack_threadid (char *inbuf
, threadref
* id
);
1119 void int_to_threadref (threadref
* id
, int value
);
1121 static int threadref_to_int (threadref
* ref
);
1123 static void copy_threadref (threadref
* dest
, threadref
* src
);
1125 static int threadmatch (threadref
* dest
, threadref
* src
);
1127 static char *pack_threadinfo_request (char *pkt
, int mode
, threadref
* id
);
1129 static int remote_unpack_thread_info_response (char *pkt
,
1130 threadref
* expectedref
,
1131 struct gdb_ext_thread_info
1135 static int remote_get_threadinfo (threadref
* threadid
, int fieldset
, /*TAG mask */
1136 struct gdb_ext_thread_info
*info
);
1138 static char *pack_threadlist_request (char *pkt
, int startflag
,
1140 threadref
* nextthread
);
1142 static int parse_threadlist_response (char *pkt
,
1144 threadref
* original_echo
,
1145 threadref
* resultlist
, int *doneflag
);
1147 static int remote_get_threadlist (int startflag
,
1148 threadref
* nextthread
,
1151 int *result_count
, threadref
* threadlist
);
1153 typedef int (*rmt_thread_action
) (threadref
* ref
, void *context
);
1155 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
1156 void *context
, int looplimit
);
1158 static int remote_newthread_step (threadref
* ref
, void *context
);
1160 /* encode 64 bits in 16 chars of hex */
1162 static const char hexchars
[] = "0123456789abcdef";
1165 ishex (int ch
, int *val
)
1167 if ((ch
>= 'a') && (ch
<= 'f'))
1169 *val
= ch
- 'a' + 10;
1172 if ((ch
>= 'A') && (ch
<= 'F'))
1174 *val
= ch
- 'A' + 10;
1177 if ((ch
>= '0') && (ch
<= '9'))
1188 if (ch
>= 'a' && ch
<= 'f')
1189 return ch
- 'a' + 10;
1190 if (ch
>= '0' && ch
<= '9')
1192 if (ch
>= 'A' && ch
<= 'F')
1193 return ch
- 'A' + 10;
1198 stub_unpack_int (char *buff
, int fieldlength
)
1205 nibble
= stubhex (*buff
++);
1209 retval
= retval
<< 4;
1215 unpack_varlen_hex (char *buff
, /* packet to parse */
1221 while (ishex (*buff
, &nibble
))
1224 retval
= retval
<< 4;
1225 retval
|= nibble
& 0x0f;
1232 unpack_nibble (char *buf
, int *val
)
1234 ishex (*buf
++, val
);
1239 pack_nibble (char *buf
, int nibble
)
1241 *buf
++ = hexchars
[(nibble
& 0x0f)];
1246 pack_hex_byte (char *pkt
, int byte
)
1248 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
1249 *pkt
++ = hexchars
[(byte
& 0xf)];
1254 unpack_byte (char *buf
, int *value
)
1256 *value
= stub_unpack_int (buf
, 2);
1261 pack_int (char *buf
, int value
)
1263 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
1264 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
1265 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
1266 buf
= pack_hex_byte (buf
, (value
& 0xff));
1271 unpack_int (char *buf
, int *value
)
1273 *value
= stub_unpack_int (buf
, 8);
1277 #if 0 /* currently unused, uncomment when needed */
1278 static char *pack_string (char *pkt
, char *string
);
1281 pack_string (char *pkt
, char *string
)
1286 len
= strlen (string
);
1288 len
= 200; /* Bigger than most GDB packets, junk??? */
1289 pkt
= pack_hex_byte (pkt
, len
);
1293 if ((ch
== '\0') || (ch
== '#'))
1294 ch
= '*'; /* Protect encapsulation */
1299 #endif /* 0 (unused) */
1302 unpack_string (char *src
, char *dest
, int length
)
1311 pack_threadid (char *pkt
, threadref
*id
)
1314 unsigned char *altid
;
1316 altid
= (unsigned char *) id
;
1317 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
1319 pkt
= pack_hex_byte (pkt
, *altid
++);
1325 unpack_threadid (char *inbuf
, threadref
*id
)
1328 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
1331 altref
= (char *) id
;
1333 while (inbuf
< limit
)
1335 x
= stubhex (*inbuf
++);
1336 y
= stubhex (*inbuf
++);
1337 *altref
++ = (x
<< 4) | y
;
1342 /* Externally, threadrefs are 64 bits but internally, they are still
1343 ints. This is due to a mismatch of specifications. We would like
1344 to use 64bit thread references internally. This is an adapter
1348 int_to_threadref (threadref
*id
, int value
)
1350 unsigned char *scan
;
1352 scan
= (unsigned char *) id
;
1358 *scan
++ = (value
>> 24) & 0xff;
1359 *scan
++ = (value
>> 16) & 0xff;
1360 *scan
++ = (value
>> 8) & 0xff;
1361 *scan
++ = (value
& 0xff);
1365 threadref_to_int (threadref
*ref
)
1368 unsigned char *scan
;
1370 scan
= (char *) ref
;
1374 value
= (value
<< 8) | ((*scan
++) & 0xff);
1379 copy_threadref (threadref
*dest
, threadref
*src
)
1382 unsigned char *csrc
, *cdest
;
1384 csrc
= (unsigned char *) src
;
1385 cdest
= (unsigned char *) dest
;
1392 threadmatch (threadref
*dest
, threadref
*src
)
1394 /* things are broken right now, so just assume we got a match */
1396 unsigned char *srcp
, *destp
;
1398 srcp
= (char *) src
;
1399 destp
= (char *) dest
;
1403 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
1410 threadid:1, # always request threadid
1417 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1420 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
1422 *pkt
++ = 'q'; /* Info Query */
1423 *pkt
++ = 'P'; /* process or thread info */
1424 pkt
= pack_int (pkt
, mode
); /* mode */
1425 pkt
= pack_threadid (pkt
, id
); /* threadid */
1426 *pkt
= '\0'; /* terminate */
1430 /* These values tag the fields in a thread info response packet */
1431 /* Tagging the fields allows us to request specific fields and to
1432 add more fields as time goes by */
1434 #define TAG_THREADID 1 /* Echo the thread identifier */
1435 #define TAG_EXISTS 2 /* Is this process defined enough to
1436 fetch registers and its stack */
1437 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1438 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is */
1439 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1443 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
1444 struct gdb_ext_thread_info
*info
)
1446 struct remote_state
*rs
= get_remote_state ();
1450 char *limit
= pkt
+ (rs
->remote_packet_size
); /* plausable parsing limit */
1453 /* info->threadid = 0; FIXME: implement zero_threadref */
1455 info
->display
[0] = '\0';
1456 info
->shortname
[0] = '\0';
1457 info
->more_display
[0] = '\0';
1459 /* Assume the characters indicating the packet type have been stripped */
1460 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
1461 pkt
= unpack_threadid (pkt
, &ref
);
1464 warning ("Incomplete response to threadinfo request\n");
1465 if (!threadmatch (&ref
, expectedref
))
1466 { /* This is an answer to a different request */
1467 warning ("ERROR RMT Thread info mismatch\n");
1470 copy_threadref (&info
->threadid
, &ref
);
1472 /* Loop on tagged fields , try to bail if somthing goes wrong */
1474 while ((pkt
< limit
) && mask
&& *pkt
) /* packets are terminated with nulls */
1476 pkt
= unpack_int (pkt
, &tag
); /* tag */
1477 pkt
= unpack_byte (pkt
, &length
); /* length */
1478 if (!(tag
& mask
)) /* tags out of synch with mask */
1480 warning ("ERROR RMT: threadinfo tag mismatch\n");
1484 if (tag
== TAG_THREADID
)
1488 warning ("ERROR RMT: length of threadid is not 16\n");
1492 pkt
= unpack_threadid (pkt
, &ref
);
1493 mask
= mask
& ~TAG_THREADID
;
1496 if (tag
== TAG_EXISTS
)
1498 info
->active
= stub_unpack_int (pkt
, length
);
1500 mask
= mask
& ~(TAG_EXISTS
);
1503 warning ("ERROR RMT: 'exists' length too long\n");
1509 if (tag
== TAG_THREADNAME
)
1511 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
1512 mask
= mask
& ~TAG_THREADNAME
;
1515 if (tag
== TAG_DISPLAY
)
1517 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
1518 mask
= mask
& ~TAG_DISPLAY
;
1521 if (tag
== TAG_MOREDISPLAY
)
1523 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
1524 mask
= mask
& ~TAG_MOREDISPLAY
;
1527 warning ("ERROR RMT: unknown thread info tag\n");
1528 break; /* Not a tag we know about */
1534 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
1535 struct gdb_ext_thread_info
*info
)
1537 struct remote_state
*rs
= get_remote_state ();
1539 char *threadinfo_pkt
= alloca (rs
->remote_packet_size
);
1541 pack_threadinfo_request (threadinfo_pkt
, fieldset
, threadid
);
1542 putpkt (threadinfo_pkt
);
1543 getpkt (threadinfo_pkt
, (rs
->remote_packet_size
), 0);
1544 result
= remote_unpack_thread_info_response (threadinfo_pkt
+ 2, threadid
,
1549 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1552 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
1553 threadref
*nextthread
)
1555 *pkt
++ = 'q'; /* info query packet */
1556 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
1557 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
1558 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
1559 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
1564 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1567 parse_threadlist_response (char *pkt
, int result_limit
,
1568 threadref
*original_echo
, threadref
*resultlist
,
1571 struct remote_state
*rs
= get_remote_state ();
1573 int count
, resultcount
, done
;
1576 /* Assume the 'q' and 'M chars have been stripped. */
1577 limit
= pkt
+ ((rs
->remote_packet_size
) - BUF_THREAD_ID_SIZE
); /* done parse past here */
1578 pkt
= unpack_byte (pkt
, &count
); /* count field */
1579 pkt
= unpack_nibble (pkt
, &done
);
1580 /* The first threadid is the argument threadid. */
1581 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
1582 while ((count
-- > 0) && (pkt
< limit
))
1584 pkt
= unpack_threadid (pkt
, resultlist
++);
1585 if (resultcount
++ >= result_limit
)
1594 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
1595 int *done
, int *result_count
, threadref
*threadlist
)
1597 struct remote_state
*rs
= get_remote_state ();
1598 static threadref echo_nextthread
;
1599 char *threadlist_packet
= alloca (rs
->remote_packet_size
);
1600 char *t_response
= alloca (rs
->remote_packet_size
);
1603 /* Trancate result limit to be smaller than the packet size */
1604 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10) >= (rs
->remote_packet_size
))
1605 result_limit
= ((rs
->remote_packet_size
) / BUF_THREAD_ID_SIZE
) - 2;
1607 pack_threadlist_request (threadlist_packet
,
1608 startflag
, result_limit
, nextthread
);
1609 putpkt (threadlist_packet
);
1610 getpkt (t_response
, (rs
->remote_packet_size
), 0);
1613 parse_threadlist_response (t_response
+ 2, result_limit
, &echo_nextthread
,
1616 if (!threadmatch (&echo_nextthread
, nextthread
))
1618 /* FIXME: This is a good reason to drop the packet */
1619 /* Possably, there is a duplicate response */
1621 retransmit immediatly - race conditions
1622 retransmit after timeout - yes
1624 wait for packet, then exit
1626 warning ("HMM: threadlist did not echo arg thread, dropping it\n");
1627 return 0; /* I choose simply exiting */
1629 if (*result_count
<= 0)
1633 warning ("RMT ERROR : failed to get remote thread list\n");
1636 return result
; /* break; */
1638 if (*result_count
> result_limit
)
1641 warning ("RMT ERROR: threadlist response longer than requested\n");
1647 /* This is the interface between remote and threads, remotes upper interface */
1649 /* remote_find_new_threads retrieves the thread list and for each
1650 thread in the list, looks up the thread in GDB's internal list,
1651 ading the thread if it does not already exist. This involves
1652 getting partial thread lists from the remote target so, polling the
1653 quit_flag is required. */
1656 /* About this many threadisds fit in a packet. */
1658 #define MAXTHREADLISTRESULTS 32
1661 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
1664 int done
, i
, result_count
;
1668 static threadref nextthread
;
1669 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
1674 if (loopcount
++ > looplimit
)
1677 warning ("Remote fetch threadlist -infinite loop-\n");
1680 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
1681 &done
, &result_count
, resultthreadlist
))
1686 /* clear for later iterations */
1688 /* Setup to resume next batch of thread references, set nextthread. */
1689 if (result_count
>= 1)
1690 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
1692 while (result_count
--)
1693 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
1700 remote_newthread_step (threadref
*ref
, void *context
)
1704 ptid
= pid_to_ptid (threadref_to_int (ref
));
1706 if (!in_thread_list (ptid
))
1708 return 1; /* continue iterator */
1711 #define CRAZY_MAX_THREADS 1000
1714 remote_current_thread (ptid_t oldpid
)
1716 struct remote_state
*rs
= get_remote_state ();
1717 char *buf
= alloca (rs
->remote_packet_size
);
1720 getpkt (buf
, (rs
->remote_packet_size
), 0);
1721 if (buf
[0] == 'Q' && buf
[1] == 'C')
1722 return pid_to_ptid (strtol (&buf
[2], NULL
, 16));
1727 /* Find new threads for info threads command.
1728 * Original version, using John Metzler's thread protocol.
1732 remote_find_new_threads (void)
1734 remote_threadlist_iterator (remote_newthread_step
, 0,
1736 if (PIDGET (inferior_ptid
) == MAGIC_NULL_PID
) /* ack ack ack */
1737 inferior_ptid
= remote_current_thread (inferior_ptid
);
1741 * Find all threads for info threads command.
1742 * Uses new thread protocol contributed by Cisco.
1743 * Falls back and attempts to use the older method (above)
1744 * if the target doesn't respond to the new method.
1748 remote_threads_info (void)
1750 struct remote_state
*rs
= get_remote_state ();
1751 char *buf
= alloca (rs
->remote_packet_size
);
1755 if (remote_desc
== 0) /* paranoia */
1756 error ("Command can only be used when connected to the remote target.");
1758 if (use_threadinfo_query
)
1760 putpkt ("qfThreadInfo");
1762 getpkt (bufp
, (rs
->remote_packet_size
), 0);
1763 if (bufp
[0] != '\0') /* q packet recognized */
1765 while (*bufp
++ == 'm') /* reply contains one or more TID */
1769 tid
= strtol (bufp
, &bufp
, 16);
1770 if (tid
!= 0 && !in_thread_list (pid_to_ptid (tid
)))
1771 add_thread (pid_to_ptid (tid
));
1773 while (*bufp
++ == ','); /* comma-separated list */
1774 putpkt ("qsThreadInfo");
1776 getpkt (bufp
, (rs
->remote_packet_size
), 0);
1782 /* Else fall back to old method based on jmetzler protocol. */
1783 use_threadinfo_query
= 0;
1784 remote_find_new_threads ();
1789 * Collect a descriptive string about the given thread.
1790 * The target may say anything it wants to about the thread
1791 * (typically info about its blocked / runnable state, name, etc.).
1792 * This string will appear in the info threads display.
1794 * Optional: targets are not required to implement this function.
1798 remote_threads_extra_info (struct thread_info
*tp
)
1800 struct remote_state
*rs
= get_remote_state ();
1804 struct gdb_ext_thread_info threadinfo
;
1805 static char display_buf
[100]; /* arbitrary... */
1806 char *bufp
= alloca (rs
->remote_packet_size
);
1807 int n
= 0; /* position in display_buf */
1809 if (remote_desc
== 0) /* paranoia */
1810 internal_error (__FILE__
, __LINE__
,
1811 "remote_threads_extra_info");
1813 if (use_threadextra_query
)
1815 sprintf (bufp
, "qThreadExtraInfo,%x", PIDGET (tp
->ptid
));
1817 getpkt (bufp
, (rs
->remote_packet_size
), 0);
1820 n
= min (strlen (bufp
) / 2, sizeof (display_buf
));
1821 result
= hex2bin (bufp
, display_buf
, n
);
1822 display_buf
[result
] = '\0';
1827 /* If the above query fails, fall back to the old method. */
1828 use_threadextra_query
= 0;
1829 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
1830 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
1831 int_to_threadref (&id
, PIDGET (tp
->ptid
));
1832 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
1833 if (threadinfo
.active
)
1835 if (*threadinfo
.shortname
)
1836 n
+= sprintf(&display_buf
[0], " Name: %s,", threadinfo
.shortname
);
1837 if (*threadinfo
.display
)
1838 n
+= sprintf(&display_buf
[n
], " State: %s,", threadinfo
.display
);
1839 if (*threadinfo
.more_display
)
1840 n
+= sprintf(&display_buf
[n
], " Priority: %s",
1841 threadinfo
.more_display
);
1845 /* for purely cosmetic reasons, clear up trailing commas */
1846 if (',' == display_buf
[n
-1])
1847 display_buf
[n
-1] = ' ';
1856 /* Restart the remote side; this is an extended protocol operation. */
1859 extended_remote_restart (void)
1861 struct remote_state
*rs
= get_remote_state ();
1862 char *buf
= alloca (rs
->remote_packet_size
);
1864 /* Send the restart command; for reasons I don't understand the
1865 remote side really expects a number after the "R". */
1867 sprintf (&buf
[1], "%x", 0);
1870 /* Now query for status so this looks just like we restarted
1871 gdbserver from scratch. */
1873 getpkt (buf
, (rs
->remote_packet_size
), 0);
1876 /* Clean up connection to a remote debugger. */
1879 remote_close (int quitting
)
1882 serial_close (remote_desc
);
1886 /* Query the remote side for the text, data and bss offsets. */
1891 struct remote_state
*rs
= get_remote_state ();
1892 char *buf
= alloca (rs
->remote_packet_size
);
1895 CORE_ADDR text_addr
, data_addr
, bss_addr
;
1896 struct section_offsets
*offs
;
1898 putpkt ("qOffsets");
1900 getpkt (buf
, (rs
->remote_packet_size
), 0);
1902 if (buf
[0] == '\000')
1903 return; /* Return silently. Stub doesn't support
1907 warning ("Remote failure reply: %s", buf
);
1911 /* Pick up each field in turn. This used to be done with scanf, but
1912 scanf will make trouble if CORE_ADDR size doesn't match
1913 conversion directives correctly. The following code will work
1914 with any size of CORE_ADDR. */
1915 text_addr
= data_addr
= bss_addr
= 0;
1919 if (strncmp (ptr
, "Text=", 5) == 0)
1922 /* Don't use strtol, could lose on big values. */
1923 while (*ptr
&& *ptr
!= ';')
1924 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
1929 if (!lose
&& strncmp (ptr
, ";Data=", 6) == 0)
1932 while (*ptr
&& *ptr
!= ';')
1933 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
1938 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
1941 while (*ptr
&& *ptr
!= ';')
1942 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
1948 error ("Malformed response to offset query, %s", buf
);
1950 if (symfile_objfile
== NULL
)
1953 offs
= ((struct section_offsets
*)
1954 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
1955 memcpy (offs
, symfile_objfile
->section_offsets
,
1956 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
1958 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
1960 /* This is a temporary kludge to force data and bss to use the same offsets
1961 because that's what nlmconv does now. The real solution requires changes
1962 to the stub and remote.c that I don't have time to do right now. */
1964 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
1965 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
1967 objfile_relocate (symfile_objfile
, offs
);
1970 /* Stub for catch_errors. */
1973 remote_start_remote_dummy (struct ui_out
*uiout
, void *dummy
)
1975 start_remote (); /* Initialize gdb process mechanisms */
1976 /* NOTE: Return something >=0. A -ve value is reserved for
1977 catch_exceptions. */
1982 remote_start_remote (struct ui_out
*uiout
, void *dummy
)
1984 immediate_quit
++; /* Allow user to interrupt it */
1986 /* Ack any packet which the remote side has already sent. */
1987 serial_write (remote_desc
, "+", 1);
1989 /* Let the stub know that we want it to return the thread. */
1992 inferior_ptid
= remote_current_thread (inferior_ptid
);
1994 get_offsets (); /* Get text, data & bss offsets */
1996 putpkt ("?"); /* initiate a query from remote machine */
1999 /* NOTE: See comment above in remote_start_remote_dummy(). This
2000 function returns something >=0. */
2001 return remote_start_remote_dummy (uiout
, dummy
);
2004 /* Open a connection to a remote debugger.
2005 NAME is the filename used for communication. */
2008 remote_open (char *name
, int from_tty
)
2010 remote_open_1 (name
, from_tty
, &remote_ops
, 0, 0);
2013 /* Just like remote_open, but with asynchronous support. */
2015 remote_async_open (char *name
, int from_tty
)
2017 remote_open_1 (name
, from_tty
, &remote_async_ops
, 0, 1);
2020 /* Open a connection to a remote debugger using the extended
2021 remote gdb protocol. NAME is the filename used for communication. */
2024 extended_remote_open (char *name
, int from_tty
)
2026 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */,
2030 /* Just like extended_remote_open, but with asynchronous support. */
2032 extended_remote_async_open (char *name
, int from_tty
)
2034 remote_open_1 (name
, from_tty
, &extended_async_remote_ops
,
2035 1 /*extended_p */, 1 /* async_p */);
2038 /* Generic code for opening a connection to a remote target. */
2041 init_all_packet_configs (void)
2044 update_packet_config (&remote_protocol_P
);
2045 update_packet_config (&remote_protocol_qSymbol
);
2046 update_packet_config (&remote_protocol_vcont
);
2047 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2048 update_packet_config (&remote_protocol_Z
[i
]);
2049 /* Force remote_write_bytes to check whether target supports binary
2051 update_packet_config (&remote_protocol_binary_download
);
2052 update_packet_config (&remote_protocol_qPart_auxv
);
2055 /* Symbol look-up. */
2058 remote_check_symbols (struct objfile
*objfile
)
2060 struct remote_state
*rs
= get_remote_state ();
2061 char *msg
, *reply
, *tmp
;
2062 struct minimal_symbol
*sym
;
2065 if (remote_protocol_qSymbol
.support
== PACKET_DISABLE
)
2068 msg
= alloca (rs
->remote_packet_size
);
2069 reply
= alloca (rs
->remote_packet_size
);
2071 /* Invite target to request symbol lookups. */
2073 putpkt ("qSymbol::");
2074 getpkt (reply
, (rs
->remote_packet_size
), 0);
2075 packet_ok (reply
, &remote_protocol_qSymbol
);
2077 while (strncmp (reply
, "qSymbol:", 8) == 0)
2080 end
= hex2bin (tmp
, msg
, strlen (tmp
) / 2);
2082 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
2084 sprintf (msg
, "qSymbol::%s", &reply
[8]);
2086 sprintf (msg
, "qSymbol:%s:%s",
2087 paddr_nz (SYMBOL_VALUE_ADDRESS (sym
)),
2090 getpkt (reply
, (rs
->remote_packet_size
), 0);
2094 static struct serial
*
2095 remote_serial_open (char *name
)
2097 static int udp_warning
= 0;
2099 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2100 of in ser-tcp.c, because it is the remote protocol assuming that the
2101 serial connection is reliable and not the serial connection promising
2103 if (!udp_warning
&& strncmp (name
, "udp:", 4) == 0)
2105 warning ("The remote protocol may be unreliable over UDP.");
2106 warning ("Some events may be lost, rendering further debugging "
2111 return serial_open (name
);
2115 remote_open_1 (char *name
, int from_tty
, struct target_ops
*target
,
2116 int extended_p
, int async_p
)
2119 struct remote_state
*rs
= get_remote_state ();
2121 error ("To open a remote debug connection, you need to specify what\n"
2122 "serial device is attached to the remote system\n"
2123 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
2125 /* See FIXME above */
2127 wait_forever_enabled_p
= 1;
2129 reopen_exec_file ();
2132 target_preopen (from_tty
);
2134 unpush_target (target
);
2136 remote_desc
= remote_serial_open (name
);
2138 perror_with_name (name
);
2140 if (baud_rate
!= -1)
2142 if (serial_setbaudrate (remote_desc
, baud_rate
))
2144 /* The requested speed could not be set. Error out to
2145 top level after closing remote_desc. Take care to
2146 set remote_desc to NULL to avoid closing remote_desc
2148 serial_close (remote_desc
);
2150 perror_with_name (name
);
2154 serial_raw (remote_desc
);
2156 /* If there is something sitting in the buffer we might take it as a
2157 response to a command, which would be bad. */
2158 serial_flush_input (remote_desc
);
2162 puts_filtered ("Remote debugging using ");
2163 puts_filtered (name
);
2164 puts_filtered ("\n");
2166 push_target (target
); /* Switch to using remote target now */
2168 init_all_packet_configs ();
2170 general_thread
= -2;
2171 continue_thread
= -2;
2173 /* Probe for ability to use "ThreadInfo" query, as required. */
2174 use_threadinfo_query
= 1;
2175 use_threadextra_query
= 1;
2177 /* Without this, some commands which require an active target (such
2178 as kill) won't work. This variable serves (at least) double duty
2179 as both the pid of the target process (if it has such), and as a
2180 flag indicating that a target is active. These functions should
2181 be split out into seperate variables, especially since GDB will
2182 someday have a notion of debugging several processes. */
2184 inferior_ptid
= pid_to_ptid (MAGIC_NULL_PID
);
2188 /* With this target we start out by owning the terminal. */
2189 remote_async_terminal_ours_p
= 1;
2191 /* FIXME: cagney/1999-09-23: During the initial connection it is
2192 assumed that the target is already ready and able to respond to
2193 requests. Unfortunately remote_start_remote() eventually calls
2194 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2195 around this. Eventually a mechanism that allows
2196 wait_for_inferior() to expect/get timeouts will be
2198 wait_forever_enabled_p
= 0;
2201 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2202 /* First delete any symbols previously loaded from shared libraries. */
2203 no_shared_libraries (NULL
, 0);
2206 /* Start the remote connection. If error() or QUIT, discard this
2207 target (we'd otherwise be in an inconsistent state) and then
2208 propogate the error on up the exception chain. This ensures that
2209 the caller doesn't stumble along blindly assuming that the
2210 function succeeded. The CLI doesn't have this problem but other
2211 UI's, such as MI do.
2213 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
2214 this function should return an error indication letting the
2215 caller restore the previous state. Unfortunately the command
2216 ``target remote'' is directly wired to this function making that
2217 impossible. On a positive note, the CLI side of this problem has
2218 been fixed - the function set_cmd_context() makes it possible for
2219 all the ``target ....'' commands to share a common callback
2220 function. See cli-dump.c. */
2221 ex
= catch_exceptions (uiout
,
2222 remote_start_remote
, NULL
,
2223 "Couldn't establish connection to remote"
2230 wait_forever_enabled_p
= 1;
2231 throw_exception (ex
);
2235 wait_forever_enabled_p
= 1;
2239 /* Tell the remote that we are using the extended protocol. */
2240 char *buf
= alloca (rs
->remote_packet_size
);
2242 getpkt (buf
, (rs
->remote_packet_size
), 0);
2244 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2245 /* FIXME: need a master target_open vector from which all
2246 remote_opens can be called, so that stuff like this can
2247 go there. Failing that, the following code must be copied
2248 to the open function for any remote target that wants to
2249 support svr4 shared libraries. */
2251 /* Set up to detect and load shared libraries. */
2252 if (exec_bfd
) /* No use without an exec file. */
2254 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid
));
2255 remote_check_symbols (symfile_objfile
);
2260 /* This takes a program previously attached to and detaches it. After
2261 this is done, GDB can be used to debug some other program. We
2262 better not have left any breakpoints in the target program or it'll
2263 die when it hits one. */
2266 remote_detach (char *args
, int from_tty
)
2268 struct remote_state
*rs
= get_remote_state ();
2269 char *buf
= alloca (rs
->remote_packet_size
);
2272 error ("Argument given to \"detach\" when remotely debugging.");
2274 /* Tell the remote target to detach. */
2276 remote_send (buf
, (rs
->remote_packet_size
));
2278 /* Unregister the file descriptor from the event loop. */
2279 if (target_is_async_p ())
2280 serial_async (remote_desc
, NULL
, 0);
2282 target_mourn_inferior ();
2284 puts_filtered ("Ending remote debugging.\n");
2287 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
2290 remote_disconnect (char *args
, int from_tty
)
2292 struct remote_state
*rs
= get_remote_state ();
2293 char *buf
= alloca (rs
->remote_packet_size
);
2296 error ("Argument given to \"detach\" when remotely debugging.");
2298 /* Unregister the file descriptor from the event loop. */
2299 if (target_is_async_p ())
2300 serial_async (remote_desc
, NULL
, 0);
2302 target_mourn_inferior ();
2304 puts_filtered ("Ending remote debugging.\n");
2307 /* Convert hex digit A to a number. */
2312 if (a
>= '0' && a
<= '9')
2314 else if (a
>= 'a' && a
<= 'f')
2315 return a
- 'a' + 10;
2316 else if (a
>= 'A' && a
<= 'F')
2317 return a
- 'A' + 10;
2319 error ("Reply contains invalid hex digit %d", a
);
2323 hex2bin (const char *hex
, char *bin
, int count
)
2327 for (i
= 0; i
< count
; i
++)
2329 if (hex
[0] == 0 || hex
[1] == 0)
2331 /* Hex string is short, or of uneven length.
2332 Return the count that has been converted so far. */
2335 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
2341 /* Convert number NIB to a hex digit. */
2349 return 'a' + nib
- 10;
2353 bin2hex (const char *bin
, char *hex
, int count
)
2356 /* May use a length, or a nul-terminated string as input. */
2358 count
= strlen (bin
);
2360 for (i
= 0; i
< count
; i
++)
2362 *hex
++ = tohex ((*bin
>> 4) & 0xf);
2363 *hex
++ = tohex (*bin
++ & 0xf);
2369 /* Check for the availability of vCont. This function should also check
2373 remote_vcont_probe (struct remote_state
*rs
, char *buf
)
2375 strcpy (buf
, "vCont?");
2377 getpkt (buf
, rs
->remote_packet_size
, 0);
2379 /* Make sure that the features we assume are supported. */
2380 if (strncmp (buf
, "vCont", 5) == 0)
2383 int support_s
, support_S
, support_c
, support_C
;
2389 while (p
&& *p
== ';')
2392 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2394 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2396 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2398 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2401 p
= strchr (p
, ';');
2404 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
2405 BUF will make packet_ok disable the packet. */
2406 if (!support_s
|| !support_S
|| !support_c
|| !support_C
)
2410 packet_ok (buf
, &remote_protocol_vcont
);
2413 /* Resume the remote inferior by using a "vCont" packet. The thread
2414 to be resumed is PTID; STEP and SIGGNAL indicate whether the
2415 resumed thread should be single-stepped and/or signalled. If PTID's
2416 PID is -1, then all threads are resumed; the thread to be stepped and/or
2417 signalled is given in the global INFERIOR_PTID. This function returns
2418 non-zero iff it resumes the inferior.
2420 This function issues a strict subset of all possible vCont commands at the
2424 remote_vcont_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2426 struct remote_state
*rs
= get_remote_state ();
2427 int pid
= PIDGET (ptid
);
2428 char *buf
= NULL
, *outbuf
;
2429 struct cleanup
*old_cleanup
;
2431 buf
= xmalloc (rs
->remote_packet_size
);
2432 old_cleanup
= make_cleanup (xfree
, buf
);
2434 if (remote_protocol_vcont
.support
== PACKET_SUPPORT_UNKNOWN
)
2435 remote_vcont_probe (rs
, buf
);
2437 if (remote_protocol_vcont
.support
== PACKET_DISABLE
)
2439 do_cleanups (old_cleanup
);
2443 /* If we could generate a wider range of packets, we'd have to worry
2444 about overflowing BUF. Should there be a generic
2445 "multi-part-packet" packet? */
2447 if (PIDGET (inferior_ptid
) == MAGIC_NULL_PID
)
2449 /* MAGIC_NULL_PTID means that we don't have any active threads, so we
2450 don't have any PID numbers the inferior will understand. Make sure
2451 to only send forms that do not specify a PID. */
2452 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2453 outbuf
= xstrprintf ("vCont;S%02x", siggnal
);
2455 outbuf
= xstrprintf ("vCont;s");
2456 else if (siggnal
!= TARGET_SIGNAL_0
)
2457 outbuf
= xstrprintf ("vCont;C%02x", siggnal
);
2459 outbuf
= xstrprintf ("vCont;c");
2463 /* Resume all threads, with preference for INFERIOR_PTID. */
2464 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2465 outbuf
= xstrprintf ("vCont;S%02x:%x;c", siggnal
,
2466 PIDGET (inferior_ptid
));
2468 outbuf
= xstrprintf ("vCont;s:%x;c", PIDGET (inferior_ptid
));
2469 else if (siggnal
!= TARGET_SIGNAL_0
)
2470 outbuf
= xstrprintf ("vCont;C%02x:%x;c", siggnal
,
2471 PIDGET (inferior_ptid
));
2473 outbuf
= xstrprintf ("vCont;c");
2477 /* Scheduler locking; resume only PTID. */
2478 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2479 outbuf
= xstrprintf ("vCont;S%02x:%x", siggnal
, pid
);
2481 outbuf
= xstrprintf ("vCont;s:%x", pid
);
2482 else if (siggnal
!= TARGET_SIGNAL_0
)
2483 outbuf
= xstrprintf ("vCont;C%02x:%x", siggnal
, pid
);
2485 outbuf
= xstrprintf ("vCont;c:%x", pid
);
2488 gdb_assert (outbuf
&& strlen (outbuf
) < rs
->remote_packet_size
);
2489 make_cleanup (xfree
, outbuf
);
2493 do_cleanups (old_cleanup
);
2498 /* Tell the remote machine to resume. */
2500 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
2502 static int last_sent_step
;
2505 remote_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2507 struct remote_state
*rs
= get_remote_state ();
2508 char *buf
= alloca (rs
->remote_packet_size
);
2509 int pid
= PIDGET (ptid
);
2512 last_sent_signal
= siggnal
;
2513 last_sent_step
= step
;
2515 /* A hook for when we need to do something at the last moment before
2517 if (deprecated_target_resume_hook
)
2518 (*deprecated_target_resume_hook
) ();
2520 /* The vCont packet doesn't need to specify threads via Hc. */
2521 if (remote_vcont_resume (ptid
, step
, siggnal
))
2524 /* All other supported resume packets do use Hc, so call set_thread. */
2526 set_thread (0, 0); /* run any thread */
2528 set_thread (pid
, 0); /* run this thread */
2530 if (siggnal
!= TARGET_SIGNAL_0
)
2532 buf
[0] = step
? 'S' : 'C';
2533 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
2534 buf
[2] = tohex (((int) siggnal
) & 0xf);
2538 strcpy (buf
, step
? "s" : "c");
2543 /* Same as remote_resume, but with async support. */
2545 remote_async_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2547 remote_resume (ptid
, step
, siggnal
);
2549 /* We are about to start executing the inferior, let's register it
2550 with the event loop. NOTE: this is the one place where all the
2551 execution commands end up. We could alternatively do this in each
2552 of the execution commands in infcmd.c.*/
2553 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
2554 into infcmd.c in order to allow inferior function calls to work
2555 NOT asynchronously. */
2556 if (event_loop_p
&& target_can_async_p ())
2557 target_async (inferior_event_handler
, 0);
2558 /* Tell the world that the target is now executing. */
2559 /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set
2560 this? Instead, should the client of target just assume (for
2561 async targets) that the target is going to start executing? Is
2562 this information already found in the continuation block? */
2563 if (target_is_async_p ())
2564 target_executing
= 1;
2568 /* Set up the signal handler for SIGINT, while the target is
2569 executing, ovewriting the 'regular' SIGINT signal handler. */
2571 initialize_sigint_signal_handler (void)
2573 sigint_remote_token
=
2574 create_async_signal_handler (async_remote_interrupt
, NULL
);
2575 signal (SIGINT
, handle_remote_sigint
);
2578 /* Signal handler for SIGINT, while the target is executing. */
2580 handle_remote_sigint (int sig
)
2582 signal (sig
, handle_remote_sigint_twice
);
2583 sigint_remote_twice_token
=
2584 create_async_signal_handler (async_remote_interrupt_twice
, NULL
);
2585 mark_async_signal_handler_wrapper (sigint_remote_token
);
2588 /* Signal handler for SIGINT, installed after SIGINT has already been
2589 sent once. It will take effect the second time that the user sends
2592 handle_remote_sigint_twice (int sig
)
2594 signal (sig
, handle_sigint
);
2595 sigint_remote_twice_token
=
2596 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
2597 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
2600 /* Perform the real interruption of the target execution, in response
2603 async_remote_interrupt (gdb_client_data arg
)
2606 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2611 /* Perform interrupt, if the first attempt did not succeed. Just give
2612 up on the target alltogether. */
2614 async_remote_interrupt_twice (gdb_client_data arg
)
2617 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
2618 /* Do something only if the target was not killed by the previous
2620 if (target_executing
)
2623 signal (SIGINT
, handle_remote_sigint
);
2627 /* Reinstall the usual SIGINT handlers, after the target has
2630 cleanup_sigint_signal_handler (void *dummy
)
2632 signal (SIGINT
, handle_sigint
);
2633 if (sigint_remote_twice_token
)
2634 delete_async_signal_handler ((struct async_signal_handler
**) & sigint_remote_twice_token
);
2635 if (sigint_remote_token
)
2636 delete_async_signal_handler ((struct async_signal_handler
**) & sigint_remote_token
);
2639 /* Send ^C to target to halt it. Target will respond, and send us a
2641 static void (*ofunc
) (int);
2643 /* The command line interface's stop routine. This function is installed
2644 as a signal handler for SIGINT. The first time a user requests a
2645 stop, we call remote_stop to send a break or ^C. If there is no
2646 response from the target (it didn't stop when the user requested it),
2647 we ask the user if he'd like to detach from the target. */
2649 remote_interrupt (int signo
)
2651 /* If this doesn't work, try more severe steps. */
2652 signal (signo
, remote_interrupt_twice
);
2655 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2660 /* The user typed ^C twice. */
2663 remote_interrupt_twice (int signo
)
2665 signal (signo
, ofunc
);
2667 signal (signo
, remote_interrupt
);
2670 /* This is the generic stop called via the target vector. When a target
2671 interrupt is requested, either by the command line or the GUI, we
2672 will eventually end up here. */
2676 /* Send a break or a ^C, depending on user preference. */
2678 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
2681 serial_send_break (remote_desc
);
2683 serial_write (remote_desc
, "\003", 1);
2686 /* Ask the user what to do when an interrupt is received. */
2689 interrupt_query (void)
2691 target_terminal_ours ();
2693 if (query ("Interrupted while waiting for the program.\n\
2694 Give up (and stop debugging it)? "))
2696 target_mourn_inferior ();
2697 throw_exception (RETURN_QUIT
);
2700 target_terminal_inferior ();
2703 /* Enable/disable target terminal ownership. Most targets can use
2704 terminal groups to control terminal ownership. Remote targets are
2705 different in that explicit transfer of ownership to/from GDB/target
2709 remote_async_terminal_inferior (void)
2711 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
2712 sync_execution here. This function should only be called when
2713 GDB is resuming the inferior in the forground. A background
2714 resume (``run&'') should leave GDB in control of the terminal and
2715 consequently should not call this code. */
2716 if (!sync_execution
)
2718 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
2719 calls target_terminal_*() idenpotent. The event-loop GDB talking
2720 to an asynchronous target with a synchronous command calls this
2721 function from both event-top.c and infrun.c/infcmd.c. Once GDB
2722 stops trying to transfer the terminal to the target when it
2723 shouldn't this guard can go away. */
2724 if (!remote_async_terminal_ours_p
)
2726 delete_file_handler (input_fd
);
2727 remote_async_terminal_ours_p
= 0;
2728 initialize_sigint_signal_handler ();
2729 /* NOTE: At this point we could also register our selves as the
2730 recipient of all input. Any characters typed could then be
2731 passed on down to the target. */
2735 remote_async_terminal_ours (void)
2737 /* See FIXME in remote_async_terminal_inferior. */
2738 if (!sync_execution
)
2740 /* See FIXME in remote_async_terminal_inferior. */
2741 if (remote_async_terminal_ours_p
)
2743 cleanup_sigint_signal_handler (NULL
);
2744 add_file_handler (input_fd
, stdin_event_handler
, 0);
2745 remote_async_terminal_ours_p
= 1;
2748 /* If nonzero, ignore the next kill. */
2753 remote_console_output (char *msg
)
2757 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
2760 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
2763 fputs_unfiltered (tb
, gdb_stdtarg
);
2765 gdb_flush (gdb_stdtarg
);
2768 /* Wait until the remote machine stops, then return,
2769 storing status in STATUS just as `wait' would.
2770 Returns "pid", which in the case of a multi-threaded
2771 remote OS, is the thread-id. */
2774 remote_wait (ptid_t ptid
, struct target_waitstatus
*status
)
2776 struct remote_state
*rs
= get_remote_state ();
2777 unsigned char *buf
= alloca (rs
->remote_packet_size
);
2778 ULONGEST thread_num
= -1;
2781 status
->kind
= TARGET_WAITKIND_EXITED
;
2782 status
->value
.integer
= 0;
2788 ofunc
= signal (SIGINT
, remote_interrupt
);
2789 getpkt (buf
, (rs
->remote_packet_size
), 1);
2790 signal (SIGINT
, ofunc
);
2792 /* This is a hook for when we need to do something (perhaps the
2793 collection of trace data) every time the target stops. */
2794 if (deprecated_target_wait_loop_hook
)
2795 (*deprecated_target_wait_loop_hook
) ();
2797 remote_stopped_by_watchpoint_p
= 0;
2801 case 'E': /* Error of some sort */
2802 warning ("Remote failure reply: %s", buf
);
2804 case 'F': /* File-I/O request */
2805 remote_fileio_request (buf
);
2807 case 'T': /* Status with PC, SP, FP, ... */
2810 char regs
[MAX_REGISTER_SIZE
];
2812 /* Expedited reply, containing Signal, {regno, reg} repeat */
2813 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
2815 n... = register number
2816 r... = register contents
2818 p
= &buf
[3]; /* after Txx */
2827 /* If the packet contains a register number save it in pnum
2828 and set p1 to point to the character following it.
2829 Otherwise p1 points to p. */
2831 /* If this packet is an awatch packet, don't parse the 'a'
2832 as a register number. */
2834 if (strncmp (p
, "awatch", strlen("awatch")) != 0)
2836 /* Read the ``P'' register number. */
2837 pnum
= strtol (p
, &p_temp
, 16);
2838 p1
= (unsigned char *) p_temp
;
2843 if (p1
== p
) /* No register number present here */
2845 p1
= (unsigned char *) strchr (p
, ':');
2847 warning ("Malformed packet(a) (missing colon): %s\n\
2850 if (strncmp (p
, "thread", p1
- p
) == 0)
2852 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
2853 record_currthread (thread_num
);
2854 p
= (unsigned char *) p_temp
;
2856 else if ((strncmp (p
, "watch", p1
- p
) == 0)
2857 || (strncmp (p
, "rwatch", p1
- p
) == 0)
2858 || (strncmp (p
, "awatch", p1
- p
) == 0))
2860 remote_stopped_by_watchpoint_p
= 1;
2861 p
= unpack_varlen_hex (++p1
, &addr
);
2862 remote_watch_data_address
= (CORE_ADDR
)addr
;
2866 /* Silently skip unknown optional info. */
2867 p_temp
= strchr (p1
+ 1, ';');
2869 p
= (unsigned char *) p_temp
;
2874 struct packet_reg
*reg
= packet_reg_from_pnum (rs
, pnum
);
2878 error ("Malformed packet(b) (missing colon): %s\nPacket: '%s'\n",
2882 error ("Remote sent bad register number %s: %s\nPacket: '%s'\n",
2883 phex_nz (pnum
, 0), p
, buf
);
2885 fieldsize
= hex2bin (p
, regs
, DEPRECATED_REGISTER_RAW_SIZE (reg
->regnum
));
2887 if (fieldsize
< DEPRECATED_REGISTER_RAW_SIZE (reg
->regnum
))
2888 warning ("Remote reply is too short: %s", buf
);
2889 supply_register (reg
->regnum
, regs
);
2893 error ("Remote register badly formatted: %s\nhere: %s", buf
, p
);
2897 case 'S': /* Old style status, just signal only */
2898 status
->kind
= TARGET_WAITKIND_STOPPED
;
2899 status
->value
.sig
= (enum target_signal
)
2900 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2904 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
2905 record_currthread (thread_num
);
2908 case 'W': /* Target exited */
2910 /* The remote process exited. */
2911 status
->kind
= TARGET_WAITKIND_EXITED
;
2912 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
2916 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
2917 status
->value
.sig
= (enum target_signal
)
2918 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2922 case 'O': /* Console output */
2923 remote_console_output (buf
+ 1);
2926 if (last_sent_signal
!= TARGET_SIGNAL_0
)
2928 /* Zero length reply means that we tried 'S' or 'C' and
2929 the remote system doesn't support it. */
2930 target_terminal_ours_for_output ();
2932 ("Can't send signals to this remote system. %s not sent.\n",
2933 target_signal_to_name (last_sent_signal
));
2934 last_sent_signal
= TARGET_SIGNAL_0
;
2935 target_terminal_inferior ();
2937 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
2938 putpkt ((char *) buf
);
2941 /* else fallthrough */
2943 warning ("Invalid remote reply: %s", buf
);
2948 if (thread_num
!= -1)
2950 return pid_to_ptid (thread_num
);
2952 return inferior_ptid
;
2955 /* Async version of remote_wait. */
2957 remote_async_wait (ptid_t ptid
, struct target_waitstatus
*status
)
2959 struct remote_state
*rs
= get_remote_state ();
2960 unsigned char *buf
= alloca (rs
->remote_packet_size
);
2961 ULONGEST thread_num
= -1;
2964 status
->kind
= TARGET_WAITKIND_EXITED
;
2965 status
->value
.integer
= 0;
2967 remote_stopped_by_watchpoint_p
= 0;
2973 if (!target_is_async_p ())
2974 ofunc
= signal (SIGINT
, remote_interrupt
);
2975 /* FIXME: cagney/1999-09-27: If we're in async mode we should
2976 _never_ wait for ever -> test on target_is_async_p().
2977 However, before we do that we need to ensure that the caller
2978 knows how to take the target into/out of async mode. */
2979 getpkt (buf
, (rs
->remote_packet_size
), wait_forever_enabled_p
);
2980 if (!target_is_async_p ())
2981 signal (SIGINT
, ofunc
);
2983 /* This is a hook for when we need to do something (perhaps the
2984 collection of trace data) every time the target stops. */
2985 if (deprecated_target_wait_loop_hook
)
2986 (*deprecated_target_wait_loop_hook
) ();
2990 case 'E': /* Error of some sort */
2991 warning ("Remote failure reply: %s", buf
);
2993 case 'F': /* File-I/O request */
2994 remote_fileio_request (buf
);
2996 case 'T': /* Status with PC, SP, FP, ... */
2999 char regs
[MAX_REGISTER_SIZE
];
3001 /* Expedited reply, containing Signal, {regno, reg} repeat */
3002 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3004 n... = register number
3005 r... = register contents
3007 p
= &buf
[3]; /* after Txx */
3016 /* If the packet contains a register number, save it in pnum
3017 and set p1 to point to the character following it.
3018 Otherwise p1 points to p. */
3020 /* If this packet is an awatch packet, don't parse the 'a'
3021 as a register number. */
3023 if (!strncmp (p
, "awatch", strlen ("awatch")) != 0)
3025 /* Read the register number. */
3026 pnum
= strtol (p
, &p_temp
, 16);
3027 p1
= (unsigned char *) p_temp
;
3032 if (p1
== p
) /* No register number present here */
3034 p1
= (unsigned char *) strchr (p
, ':');
3036 error ("Malformed packet(a) (missing colon): %s\nPacket: '%s'\n",
3038 if (strncmp (p
, "thread", p1
- p
) == 0)
3040 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
3041 record_currthread (thread_num
);
3042 p
= (unsigned char *) p_temp
;
3044 else if ((strncmp (p
, "watch", p1
- p
) == 0)
3045 || (strncmp (p
, "rwatch", p1
- p
) == 0)
3046 || (strncmp (p
, "awatch", p1
- p
) == 0))
3048 remote_stopped_by_watchpoint_p
= 1;
3049 p
= unpack_varlen_hex (++p1
, &addr
);
3050 remote_watch_data_address
= (CORE_ADDR
)addr
;
3054 /* Silently skip unknown optional info. */
3055 p_temp
= (unsigned char *) strchr (p1
+ 1, ';');
3063 struct packet_reg
*reg
= packet_reg_from_pnum (rs
, pnum
);
3066 error ("Malformed packet(b) (missing colon): %s\nPacket: '%s'\n",
3070 error ("Remote sent bad register number %ld: %s\nPacket: '%s'\n",
3073 fieldsize
= hex2bin (p
, regs
, DEPRECATED_REGISTER_RAW_SIZE (reg
->regnum
));
3075 if (fieldsize
< DEPRECATED_REGISTER_RAW_SIZE (reg
->regnum
))
3076 warning ("Remote reply is too short: %s", buf
);
3077 supply_register (reg
->regnum
, regs
);
3081 error ("Remote register badly formatted: %s\nhere: %s",
3086 case 'S': /* Old style status, just signal only */
3087 status
->kind
= TARGET_WAITKIND_STOPPED
;
3088 status
->value
.sig
= (enum target_signal
)
3089 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3093 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
3094 record_currthread (thread_num
);
3097 case 'W': /* Target exited */
3099 /* The remote process exited. */
3100 status
->kind
= TARGET_WAITKIND_EXITED
;
3101 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
3105 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
3106 status
->value
.sig
= (enum target_signal
)
3107 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3111 case 'O': /* Console output */
3112 remote_console_output (buf
+ 1);
3113 /* Return immediately to the event loop. The event loop will
3114 still be waiting on the inferior afterwards. */
3115 status
->kind
= TARGET_WAITKIND_IGNORE
;
3118 if (last_sent_signal
!= TARGET_SIGNAL_0
)
3120 /* Zero length reply means that we tried 'S' or 'C' and
3121 the remote system doesn't support it. */
3122 target_terminal_ours_for_output ();
3124 ("Can't send signals to this remote system. %s not sent.\n",
3125 target_signal_to_name (last_sent_signal
));
3126 last_sent_signal
= TARGET_SIGNAL_0
;
3127 target_terminal_inferior ();
3129 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
3130 putpkt ((char *) buf
);
3133 /* else fallthrough */
3135 warning ("Invalid remote reply: %s", buf
);
3140 if (thread_num
!= -1)
3142 return pid_to_ptid (thread_num
);
3144 return inferior_ptid
;
3147 /* Number of bytes of registers this stub implements. */
3149 static int register_bytes_found
;
3151 /* Read the remote registers into the block REGS. */
3152 /* Currently we just read all the registers, so we don't use regnum. */
3155 remote_fetch_registers (int regnum
)
3157 struct remote_state
*rs
= get_remote_state ();
3158 char *buf
= alloca (rs
->remote_packet_size
);
3161 char *regs
= alloca (rs
->sizeof_g_packet
);
3163 set_thread (PIDGET (inferior_ptid
), 1);
3167 struct packet_reg
*reg
= packet_reg_from_regnum (rs
, regnum
);
3168 gdb_assert (reg
!= NULL
);
3169 if (!reg
->in_g_packet
)
3170 internal_error (__FILE__
, __LINE__
,
3171 "Attempt to fetch a non G-packet register when this "
3172 "remote.c does not support the p-packet.");
3176 remote_send (buf
, (rs
->remote_packet_size
));
3178 /* Save the size of the packet sent to us by the target. Its used
3179 as a heuristic when determining the max size of packets that the
3180 target can safely receive. */
3181 if ((rs
->actual_register_packet_size
) == 0)
3182 (rs
->actual_register_packet_size
) = strlen (buf
);
3184 /* Unimplemented registers read as all bits zero. */
3185 memset (regs
, 0, rs
->sizeof_g_packet
);
3187 /* We can get out of synch in various cases. If the first character
3188 in the buffer is not a hex character, assume that has happened
3189 and try to fetch another packet to read. */
3190 while ((buf
[0] < '0' || buf
[0] > '9')
3191 && (buf
[0] < 'a' || buf
[0] > 'f')
3192 && buf
[0] != 'x') /* New: unavailable register value */
3195 fprintf_unfiltered (gdb_stdlog
,
3196 "Bad register packet; fetching a new packet\n");
3197 getpkt (buf
, (rs
->remote_packet_size
), 0);
3200 /* Reply describes registers byte by byte, each byte encoded as two
3201 hex characters. Suck them all up, then supply them to the
3202 register cacheing/storage mechanism. */
3205 for (i
= 0; i
< rs
->sizeof_g_packet
; i
++)
3211 warning ("Remote reply is of odd length: %s", buf
);
3212 /* Don't change register_bytes_found in this case, and don't
3213 print a second warning. */
3216 if (p
[0] == 'x' && p
[1] == 'x')
3217 regs
[i
] = 0; /* 'x' */
3219 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3223 if (i
!= register_bytes_found
)
3225 register_bytes_found
= i
;
3226 if (REGISTER_BYTES_OK_P ()
3227 && !REGISTER_BYTES_OK (i
))
3228 warning ("Remote reply is too short: %s", buf
);
3234 for (i
= 0; i
< NUM_REGS
+ NUM_PSEUDO_REGS
; i
++)
3236 struct packet_reg
*r
= &rs
->regs
[i
];
3239 if (r
->offset
* 2 >= strlen (buf
))
3240 /* A short packet that didn't include the register's
3241 value, this implies that the register is zero (and
3242 not that the register is unavailable). Supply that
3244 regcache_raw_supply (current_regcache
, r
->regnum
, NULL
);
3245 else if (buf
[r
->offset
* 2] == 'x')
3247 gdb_assert (r
->offset
* 2 < strlen (buf
));
3248 /* The register isn't available, mark it as such (at
3249 the same time setting the value to zero). */
3250 regcache_raw_supply (current_regcache
, r
->regnum
, NULL
);
3251 set_register_cached (i
, -1);
3254 regcache_raw_supply (current_regcache
, r
->regnum
,
3261 /* Prepare to store registers. Since we may send them all (using a
3262 'G' request), we have to read out the ones we don't want to change
3266 remote_prepare_to_store (void)
3268 struct remote_state
*rs
= get_remote_state ();
3270 char buf
[MAX_REGISTER_SIZE
];
3272 /* Make sure the entire registers array is valid. */
3273 switch (remote_protocol_P
.support
)
3275 case PACKET_DISABLE
:
3276 case PACKET_SUPPORT_UNKNOWN
:
3277 /* Make sure all the necessary registers are cached. */
3278 for (i
= 0; i
< NUM_REGS
; i
++)
3279 if (rs
->regs
[i
].in_g_packet
)
3280 regcache_raw_read (current_regcache
, rs
->regs
[i
].regnum
, buf
);
3287 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
3288 packet was not recognized. */
3291 store_register_using_P (int regnum
)
3293 struct remote_state
*rs
= get_remote_state ();
3294 struct packet_reg
*reg
= packet_reg_from_regnum (rs
, regnum
);
3295 /* Try storing a single register. */
3296 char *buf
= alloca (rs
->remote_packet_size
);
3297 char regp
[MAX_REGISTER_SIZE
];
3301 sprintf (buf
, "P%s=", phex_nz (reg
->pnum
, 0));
3302 p
= buf
+ strlen (buf
);
3303 regcache_collect (reg
->regnum
, regp
);
3304 bin2hex (regp
, p
, DEPRECATED_REGISTER_RAW_SIZE (reg
->regnum
));
3305 remote_send (buf
, rs
->remote_packet_size
);
3307 return buf
[0] != '\0';
3311 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
3312 of the register cache buffer. FIXME: ignores errors. */
3315 remote_store_registers (int regnum
)
3317 struct remote_state
*rs
= get_remote_state ();
3323 set_thread (PIDGET (inferior_ptid
), 1);
3327 switch (remote_protocol_P
.support
)
3329 case PACKET_DISABLE
:
3332 if (store_register_using_P (regnum
))
3335 error ("Protocol error: P packet not recognized by stub");
3336 case PACKET_SUPPORT_UNKNOWN
:
3337 if (store_register_using_P (regnum
))
3339 /* The stub recognized the 'P' packet. Remember this. */
3340 remote_protocol_P
.support
= PACKET_ENABLE
;
3345 /* The stub does not support the 'P' packet. Use 'G'
3346 instead, and don't try using 'P' in the future (it
3347 will just waste our time). */
3348 remote_protocol_P
.support
= PACKET_DISABLE
;
3354 /* Extract all the registers in the regcache copying them into a
3358 regs
= alloca (rs
->sizeof_g_packet
);
3359 memset (regs
, rs
->sizeof_g_packet
, 0);
3360 for (i
= 0; i
< NUM_REGS
+ NUM_PSEUDO_REGS
; i
++)
3362 struct packet_reg
*r
= &rs
->regs
[i
];
3364 regcache_collect (r
->regnum
, regs
+ r
->offset
);
3368 /* Command describes registers byte by byte,
3369 each byte encoded as two hex characters. */
3370 buf
= alloca (rs
->remote_packet_size
);
3373 /* remote_prepare_to_store insures that register_bytes_found gets set. */
3374 bin2hex (regs
, p
, register_bytes_found
);
3375 remote_send (buf
, (rs
->remote_packet_size
));
3379 /* Return the number of hex digits in num. */
3382 hexnumlen (ULONGEST num
)
3386 for (i
= 0; num
!= 0; i
++)
3392 /* Set BUF to the minimum number of hex digits representing NUM. */
3395 hexnumstr (char *buf
, ULONGEST num
)
3397 int len
= hexnumlen (num
);
3398 return hexnumnstr (buf
, num
, len
);
3402 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
3405 hexnumnstr (char *buf
, ULONGEST num
, int width
)
3411 for (i
= width
- 1; i
>= 0; i
--)
3413 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
3420 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
3423 remote_address_masked (CORE_ADDR addr
)
3425 if (remote_address_size
> 0
3426 && remote_address_size
< (sizeof (ULONGEST
) * 8))
3428 /* Only create a mask when that mask can safely be constructed
3429 in a ULONGEST variable. */
3431 mask
= (mask
<< remote_address_size
) - 1;
3437 /* Determine whether the remote target supports binary downloading.
3438 This is accomplished by sending a no-op memory write of zero length
3439 to the target at the specified address. It does not suffice to send
3440 the whole packet, since many stubs strip the eighth bit and subsequently
3441 compute a wrong checksum, which causes real havoc with remote_write_bytes.
3443 NOTE: This can still lose if the serial line is not eight-bit
3444 clean. In cases like this, the user should clear "remote
3448 check_binary_download (CORE_ADDR addr
)
3450 struct remote_state
*rs
= get_remote_state ();
3451 switch (remote_protocol_binary_download
.support
)
3453 case PACKET_DISABLE
:
3457 case PACKET_SUPPORT_UNKNOWN
:
3459 char *buf
= alloca (rs
->remote_packet_size
);
3464 p
+= hexnumstr (p
, (ULONGEST
) addr
);
3466 p
+= hexnumstr (p
, (ULONGEST
) 0);
3470 putpkt_binary (buf
, (int) (p
- buf
));
3471 getpkt (buf
, (rs
->remote_packet_size
), 0);
3476 fprintf_unfiltered (gdb_stdlog
,
3477 "binary downloading NOT suppported by target\n");
3478 remote_protocol_binary_download
.support
= PACKET_DISABLE
;
3483 fprintf_unfiltered (gdb_stdlog
,
3484 "binary downloading suppported by target\n");
3485 remote_protocol_binary_download
.support
= PACKET_ENABLE
;
3492 /* Write memory data directly to the remote machine.
3493 This does not inform the data cache; the data cache uses this.
3494 MEMADDR is the address in the remote memory space.
3495 MYADDR is the address of the buffer in our space.
3496 LEN is the number of bytes.
3498 Returns number of bytes transferred, or 0 (setting errno) for
3499 error. Only transfer a single packet. */
3502 remote_write_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
)
3506 unsigned char *plen
;
3512 unsigned char *payload_start
;
3514 /* Verify that the target can support a binary download. */
3515 check_binary_download (memaddr
);
3517 /* Compute the size, and then allocate space for the largest
3518 possible packet. Include space for an extra trailing NUL. */
3519 sizeof_buf
= get_memory_write_packet_size () + 1;
3520 buf
= alloca (sizeof_buf
);
3522 /* Compute the size of the actual payload by subtracting out the
3523 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
3524 payload_size
= (get_memory_write_packet_size () - (strlen ("$M,:#NN")
3525 + hexnumlen (memaddr
)
3526 + hexnumlen (len
)));
3528 /* Construct the packet header: "[MX]<memaddr>,<len>:". */
3530 /* Append "[XM]". Compute a best guess of the number of bytes
3531 actually transfered. */
3533 switch (remote_protocol_binary_download
.support
)
3537 /* Best guess at number of bytes that will fit. */
3538 todo
= min (len
, payload_size
);
3540 case PACKET_DISABLE
:
3542 /* num bytes that will fit */
3543 todo
= min (len
, payload_size
/ 2);
3545 case PACKET_SUPPORT_UNKNOWN
:
3546 internal_error (__FILE__
, __LINE__
,
3547 "remote_write_bytes: bad internal state");
3549 internal_error (__FILE__
, __LINE__
, "bad switch");
3552 /* Append "<memaddr>". */
3553 memaddr
= remote_address_masked (memaddr
);
3554 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
3559 /* Append <len>. Retain the location/size of <len>. It may need to
3560 be adjusted once the packet body has been created. */
3562 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
3569 /* Append the packet body. */
3571 switch (remote_protocol_binary_download
.support
)
3574 /* Binary mode. Send target system values byte by byte, in
3575 increasing byte addresses. Only escape certain critical
3578 (nr_bytes
< todo
) && (p
- payload_start
) < payload_size
;
3581 switch (myaddr
[nr_bytes
] & 0xff)
3586 /* These must be escaped */
3588 *p
++ = (myaddr
[nr_bytes
] & 0xff) ^ 0x20;
3591 *p
++ = myaddr
[nr_bytes
] & 0xff;
3595 if (nr_bytes
< todo
)
3597 /* Escape chars have filled up the buffer prematurely,
3598 and we have actually sent fewer bytes than planned.
3599 Fix-up the length field of the packet. Use the same
3600 number of characters as before. */
3601 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
3602 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
3605 case PACKET_DISABLE
:
3606 /* Normal mode: Send target system values byte by byte, in
3607 increasing byte addresses. Each byte is encoded as a two hex
3609 nr_bytes
= bin2hex (myaddr
, p
, todo
);
3612 case PACKET_SUPPORT_UNKNOWN
:
3613 internal_error (__FILE__
, __LINE__
,
3614 "remote_write_bytes: bad internal state");
3616 internal_error (__FILE__
, __LINE__
, "bad switch");
3619 putpkt_binary (buf
, (int) (p
- buf
));
3620 getpkt (buf
, sizeof_buf
, 0);
3624 /* There is no correspondance between what the remote protocol
3625 uses for errors and errno codes. We would like a cleaner way
3626 of representing errors (big enough to include errno codes,
3627 bfd_error codes, and others). But for now just return EIO. */
3632 /* Return NR_BYTES, not TODO, in case escape chars caused us to send fewer
3633 bytes than we'd planned. */
3637 /* Read memory data directly from the remote machine.
3638 This does not use the data cache; the data cache uses this.
3639 MEMADDR is the address in the remote memory space.
3640 MYADDR is the address of the buffer in our space.
3641 LEN is the number of bytes.
3643 Returns number of bytes transferred, or 0 for error. */
3645 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
3646 remote targets) shouldn't attempt to read the entire buffer.
3647 Instead it should read a single packet worth of data and then
3648 return the byte size of that packet to the caller. The caller (its
3649 caller and its callers caller ;-) already contains code for
3650 handling partial reads. */
3653 remote_read_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
)
3656 int max_buf_size
; /* Max size of packet output buffer */
3660 /* Create a buffer big enough for this packet. */
3661 max_buf_size
= get_memory_read_packet_size ();
3662 sizeof_buf
= max_buf_size
+ 1; /* Space for trailing NUL */
3663 buf
= alloca (sizeof_buf
);
3672 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
3674 /* construct "m"<memaddr>","<len>" */
3675 /* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */
3676 memaddr
= remote_address_masked (memaddr
);
3679 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
3681 p
+= hexnumstr (p
, (ULONGEST
) todo
);
3685 getpkt (buf
, sizeof_buf
, 0);
3688 && isxdigit (buf
[1]) && isxdigit (buf
[2])
3691 /* There is no correspondance between what the remote protocol uses
3692 for errors and errno codes. We would like a cleaner way of
3693 representing errors (big enough to include errno codes, bfd_error
3694 codes, and others). But for now just return EIO. */
3699 /* Reply describes memory byte by byte,
3700 each byte encoded as two hex characters. */
3703 if ((i
= hex2bin (p
, myaddr
, todo
)) < todo
)
3705 /* Reply is short. This means that we were able to read
3706 only part of what we wanted to. */
3707 return i
+ (origlen
- len
);
3716 /* Read or write LEN bytes from inferior memory at MEMADDR,
3717 transferring to or from debugger address BUFFER. Write to inferior if
3718 SHOULD_WRITE is nonzero. Returns length of data written or read; 0
3719 for error. TARGET is unused. */
3722 remote_xfer_memory (CORE_ADDR mem_addr
, char *buffer
, int mem_len
,
3723 int should_write
, struct mem_attrib
*attrib
,
3724 struct target_ops
*target
)
3726 CORE_ADDR targ_addr
;
3730 /* Should this be the selected frame? */
3731 gdbarch_remote_translate_xfer_address (current_gdbarch
, current_regcache
,
3733 &targ_addr
, &targ_len
);
3738 res
= remote_write_bytes (targ_addr
, buffer
, targ_len
);
3740 res
= remote_read_bytes (targ_addr
, buffer
, targ_len
);
3746 remote_files_info (struct target_ops
*ignore
)
3748 puts_filtered ("Debugging a target over a serial line.\n");
3751 /* Stuff for dealing with the packets which are part of this protocol.
3752 See comment at top of file for details. */
3754 /* Read a single character from the remote end, masking it down to 7 bits. */
3757 readchar (int timeout
)
3761 ch
= serial_readchar (remote_desc
, timeout
);
3766 switch ((enum serial_rc
) ch
)
3769 target_mourn_inferior ();
3770 error ("Remote connection closed");
3773 perror_with_name ("Remote communication error");
3775 case SERIAL_TIMEOUT
:
3781 /* Send the command in BUF to the remote machine, and read the reply
3782 into BUF. Report an error if we get an error reply. */
3785 remote_send (char *buf
,
3789 getpkt (buf
, sizeof_buf
, 0);
3792 error ("Remote failure reply: %s", buf
);
3795 /* Display a null-terminated packet on stdout, for debugging, using C
3799 print_packet (char *buf
)
3801 puts_filtered ("\"");
3802 fputstr_filtered (buf
, '"', gdb_stdout
);
3803 puts_filtered ("\"");
3809 return putpkt_binary (buf
, strlen (buf
));
3812 /* Send a packet to the remote machine, with error checking. The data
3813 of the packet is in BUF. The string in BUF can be at most (rs->remote_packet_size) - 5
3814 to account for the $, # and checksum, and for a possible /0 if we are
3815 debugging (remote_debug) and want to print the sent packet as a string */
3818 putpkt_binary (char *buf
, int cnt
)
3820 struct remote_state
*rs
= get_remote_state ();
3822 unsigned char csum
= 0;
3823 char *buf2
= alloca (cnt
+ 6);
3824 long sizeof_junkbuf
= (rs
->remote_packet_size
);
3825 char *junkbuf
= alloca (sizeof_junkbuf
);
3831 /* Copy the packet into buffer BUF2, encapsulating it
3832 and giving it a checksum. */
3837 for (i
= 0; i
< cnt
; i
++)
3843 *p
++ = tohex ((csum
>> 4) & 0xf);
3844 *p
++ = tohex (csum
& 0xf);
3846 /* Send it over and over until we get a positive ack. */
3850 int started_error_output
= 0;
3855 fprintf_unfiltered (gdb_stdlog
, "Sending packet: ");
3856 fputstrn_unfiltered (buf2
, p
- buf2
, 0, gdb_stdlog
);
3857 fprintf_unfiltered (gdb_stdlog
, "...");
3858 gdb_flush (gdb_stdlog
);
3860 if (serial_write (remote_desc
, buf2
, p
- buf2
))
3861 perror_with_name ("putpkt: write failed");
3863 /* read until either a timeout occurs (-2) or '+' is read */
3866 ch
= readchar (remote_timeout
);
3874 case SERIAL_TIMEOUT
:
3876 if (started_error_output
)
3878 putchar_unfiltered ('\n');
3879 started_error_output
= 0;
3888 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
3892 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
3893 case SERIAL_TIMEOUT
:
3897 break; /* Retransmit buffer */
3901 fprintf_unfiltered (gdb_stdlog
, "Packet instead of Ack, ignoring it\n");
3902 /* It's probably an old response, and we're out of sync.
3903 Just gobble up the packet and ignore it. */
3904 read_frame (junkbuf
, sizeof_junkbuf
);
3905 continue; /* Now, go look for + */
3910 if (!started_error_output
)
3912 started_error_output
= 1;
3913 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
3915 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
3919 break; /* Here to retransmit */
3923 /* This is wrong. If doing a long backtrace, the user should be
3924 able to get out next time we call QUIT, without anything as
3925 violent as interrupt_query. If we want to provide a way out of
3926 here without getting to the next QUIT, it should be based on
3927 hitting ^C twice as in remote_wait. */
3937 /* Come here after finding the start of the frame. Collect the rest
3938 into BUF, verifying the checksum, length, and handling run-length
3939 compression. No more than sizeof_buf-1 characters are read so that
3940 the buffer can be NUL terminated.
3942 Returns -1 on error, number of characters in buffer (ignoring the
3943 trailing NULL) on success. (could be extended to return one of the
3944 SERIAL status indications). */
3947 read_frame (char *buf
,
3959 /* ASSERT (bc < sizeof_buf - 1) - space for trailing NUL */
3960 c
= readchar (remote_timeout
);
3963 case SERIAL_TIMEOUT
:
3965 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
3969 fputs_filtered ("Saw new packet start in middle of old one\n",
3971 return -1; /* Start a new packet, count retries */
3974 unsigned char pktcsum
;
3980 check_0
= readchar (remote_timeout
);
3982 check_1
= readchar (remote_timeout
);
3984 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
3987 fputs_filtered ("Timeout in checksum, retrying\n", gdb_stdlog
);
3990 else if (check_0
< 0 || check_1
< 0)
3993 fputs_filtered ("Communication error in checksum\n", gdb_stdlog
);
3997 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
3998 if (csum
== pktcsum
)
4003 fprintf_filtered (gdb_stdlog
,
4004 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
4006 fputs_filtered (buf
, gdb_stdlog
);
4007 fputs_filtered ("\n", gdb_stdlog
);
4009 /* Number of characters in buffer ignoring trailing
4013 case '*': /* Run length encoding */
4018 c
= readchar (remote_timeout
);
4020 repeat
= c
- ' ' + 3; /* Compute repeat count */
4022 /* The character before ``*'' is repeated. */
4024 if (repeat
> 0 && repeat
<= 255
4026 && bc
+ repeat
- 1 < sizeof_buf
- 1)
4028 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
4034 printf_filtered ("Repeat count %d too large for buffer: ", repeat
);
4035 puts_filtered (buf
);
4036 puts_filtered ("\n");
4040 if (bc
< sizeof_buf
- 1)
4048 puts_filtered ("Remote packet too long: ");
4049 puts_filtered (buf
);
4050 puts_filtered ("\n");
4057 /* Read a packet from the remote machine, with error checking, and
4058 store it in BUF. If FOREVER, wait forever rather than timing out;
4059 this is used (in synchronous mode) to wait for a target that is is
4060 executing user code to stop. */
4061 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
4062 don't have to change all the calls to getpkt to deal with the
4063 return value, because at the moment I don't know what the right
4064 thing to do it for those. */
4072 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
4076 /* Read a packet from the remote machine, with error checking, and
4077 store it in BUF. If FOREVER, wait forever rather than timing out;
4078 this is used (in synchronous mode) to wait for a target that is is
4079 executing user code to stop. If FOREVER == 0, this function is
4080 allowed to time out gracefully and return an indication of this to
4083 getpkt_sane (char *buf
,
4092 strcpy (buf
, "timeout");
4096 timeout
= watchdog
> 0 ? watchdog
: -1;
4100 timeout
= remote_timeout
;
4104 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
4106 /* This can loop forever if the remote side sends us characters
4107 continuously, but if it pauses, we'll get a zero from readchar
4108 because of timeout. Then we'll count that as a retry. */
4110 /* Note that we will only wait forever prior to the start of a packet.
4111 After that, we expect characters to arrive at a brisk pace. They
4112 should show up within remote_timeout intervals. */
4116 c
= readchar (timeout
);
4118 if (c
== SERIAL_TIMEOUT
)
4120 if (forever
) /* Watchdog went off? Kill the target. */
4123 target_mourn_inferior ();
4124 error ("Watchdog has expired. Target detached.\n");
4127 fputs_filtered ("Timed out.\n", gdb_stdlog
);
4133 /* We've found the start of a packet, now collect the data. */
4135 val
= read_frame (buf
, sizeof_buf
);
4141 fprintf_unfiltered (gdb_stdlog
, "Packet received: ");
4142 fputstr_unfiltered (buf
, 0, gdb_stdlog
);
4143 fprintf_unfiltered (gdb_stdlog
, "\n");
4145 serial_write (remote_desc
, "+", 1);
4149 /* Try the whole thing again. */
4151 serial_write (remote_desc
, "-", 1);
4154 /* We have tried hard enough, and just can't receive the packet. Give up. */
4156 printf_unfiltered ("Ignoring packet error, continuing...\n");
4157 serial_write (remote_desc
, "+", 1);
4164 /* For some mysterious reason, wait_for_inferior calls kill instead of
4165 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4169 target_mourn_inferior ();
4173 /* Use catch_errors so the user can quit from gdb even when we aren't on
4174 speaking terms with the remote system. */
4175 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4177 /* Don't wait for it to die. I'm not really sure it matters whether
4178 we do or not. For the existing stubs, kill is a noop. */
4179 target_mourn_inferior ();
4182 /* Async version of remote_kill. */
4184 remote_async_kill (void)
4186 /* Unregister the file descriptor from the event loop. */
4187 if (target_is_async_p ())
4188 serial_async (remote_desc
, NULL
, 0);
4190 /* For some mysterious reason, wait_for_inferior calls kill instead of
4191 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4195 target_mourn_inferior ();
4199 /* Use catch_errors so the user can quit from gdb even when we aren't on
4200 speaking terms with the remote system. */
4201 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4203 /* Don't wait for it to die. I'm not really sure it matters whether
4204 we do or not. For the existing stubs, kill is a noop. */
4205 target_mourn_inferior ();
4211 remote_mourn_1 (&remote_ops
);
4215 remote_async_mourn (void)
4217 remote_mourn_1 (&remote_async_ops
);
4221 extended_remote_mourn (void)
4223 /* We do _not_ want to mourn the target like this; this will
4224 remove the extended remote target from the target stack,
4225 and the next time the user says "run" it'll fail.
4227 FIXME: What is the right thing to do here? */
4229 remote_mourn_1 (&extended_remote_ops
);
4233 /* Worker function for remote_mourn. */
4235 remote_mourn_1 (struct target_ops
*target
)
4237 unpush_target (target
);
4238 generic_mourn_inferior ();
4241 /* In the extended protocol we want to be able to do things like
4242 "run" and have them basically work as expected. So we need
4243 a special create_inferior function.
4245 FIXME: One day add support for changing the exec file
4246 we're debugging, arguments and an environment. */
4249 extended_remote_create_inferior (char *exec_file
, char *args
, char **env
)
4251 /* Rip out the breakpoints; we'll reinsert them after restarting
4252 the remote server. */
4253 remove_breakpoints ();
4255 /* Now restart the remote server. */
4256 extended_remote_restart ();
4258 /* Now put the breakpoints back in. This way we're safe if the
4259 restart function works via a unix fork on the remote side. */
4260 insert_breakpoints ();
4262 /* Clean up from the last time we were running. */
4263 clear_proceed_status ();
4265 /* Let the remote process run. */
4266 proceed (-1, TARGET_SIGNAL_0
, 0);
4269 /* Async version of extended_remote_create_inferior. */
4271 extended_remote_async_create_inferior (char *exec_file
, char *args
, char **env
)
4273 /* Rip out the breakpoints; we'll reinsert them after restarting
4274 the remote server. */
4275 remove_breakpoints ();
4277 /* If running asynchronously, register the target file descriptor
4278 with the event loop. */
4279 if (event_loop_p
&& target_can_async_p ())
4280 target_async (inferior_event_handler
, 0);
4282 /* Now restart the remote server. */
4283 extended_remote_restart ();
4285 /* Now put the breakpoints back in. This way we're safe if the
4286 restart function works via a unix fork on the remote side. */
4287 insert_breakpoints ();
4289 /* Clean up from the last time we were running. */
4290 clear_proceed_status ();
4292 /* Let the remote process run. */
4293 proceed (-1, TARGET_SIGNAL_0
, 0);
4297 /* On some machines, e.g. 68k, we may use a different breakpoint
4298 instruction than other targets; in those use
4299 DEPRECATED_REMOTE_BREAKPOINT instead of just BREAKPOINT_FROM_PC.
4300 Also, bi-endian targets may define
4301 DEPRECATED_LITTLE_REMOTE_BREAKPOINT and
4302 DEPRECATED_BIG_REMOTE_BREAKPOINT. If none of these are defined, we
4303 just call the standard routines that are in mem-break.c. */
4305 /* NOTE: cagney/2003-06-08: This is silly. A remote and simulator
4306 target should use an identical BREAKPOINT_FROM_PC. As for native,
4307 the ARCH-OS-tdep.c code can override the default. */
4309 #if defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && defined (DEPRECATED_BIG_REMOTE_BREAKPOINT) && !defined(DEPRECATED_REMOTE_BREAKPOINT)
4310 #define DEPRECATED_REMOTE_BREAKPOINT
4313 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4315 /* If the target isn't bi-endian, just pretend it is. */
4316 #if !defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && !defined (DEPRECATED_BIG_REMOTE_BREAKPOINT)
4317 #define DEPRECATED_LITTLE_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
4318 #define DEPRECATED_BIG_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
4321 static unsigned char big_break_insn
[] = DEPRECATED_BIG_REMOTE_BREAKPOINT
;
4322 static unsigned char little_break_insn
[] = DEPRECATED_LITTLE_REMOTE_BREAKPOINT
;
4324 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4326 /* Insert a breakpoint on targets that don't have any better
4327 breakpoint support. We read the contents of the target location
4328 and stash it, then overwrite it with a breakpoint instruction.
4329 ADDR is the target location in the target machine. CONTENTS_CACHE
4330 is a pointer to memory allocated for saving the target contents.
4331 It is guaranteed by the caller to be long enough to save the number
4332 of bytes returned by BREAKPOINT_FROM_PC. */
4335 remote_insert_breakpoint (CORE_ADDR addr
, char *contents_cache
)
4337 struct remote_state
*rs
= get_remote_state ();
4338 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4343 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
4344 If it succeeds, then set the support to PACKET_ENABLE. If it
4345 fails, and the user has explicitly requested the Z support then
4346 report an error, otherwise, mark it disabled and go on. */
4348 if (remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
].support
!= PACKET_DISABLE
)
4350 char *buf
= alloca (rs
->remote_packet_size
);
4353 addr
= remote_address_masked (addr
);
4357 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4358 BREAKPOINT_FROM_PC (&addr
, &bp_size
);
4359 sprintf (p
, ",%d", bp_size
);
4362 getpkt (buf
, (rs
->remote_packet_size
), 0);
4364 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]))
4370 case PACKET_UNKNOWN
:
4375 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4376 val
= target_read_memory (addr
, contents_cache
, sizeof big_break_insn
);
4380 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
4381 val
= target_write_memory (addr
, (char *) big_break_insn
,
4382 sizeof big_break_insn
);
4384 val
= target_write_memory (addr
, (char *) little_break_insn
,
4385 sizeof little_break_insn
);
4390 return memory_insert_breakpoint (addr
, contents_cache
);
4391 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4395 remote_remove_breakpoint (CORE_ADDR addr
, char *contents_cache
)
4397 struct remote_state
*rs
= get_remote_state ();
4400 if (remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
].support
!= PACKET_DISABLE
)
4402 char *buf
= alloca (rs
->remote_packet_size
);
4409 addr
= remote_address_masked (addr
);
4410 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4411 BREAKPOINT_FROM_PC (&addr
, &bp_size
);
4412 sprintf (p
, ",%d", bp_size
);
4415 getpkt (buf
, (rs
->remote_packet_size
), 0);
4417 return (buf
[0] == 'E');
4420 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4421 return target_write_memory (addr
, contents_cache
, sizeof big_break_insn
);
4423 return memory_remove_breakpoint (addr
, contents_cache
);
4424 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4428 watchpoint_to_Z_packet (int type
)
4442 internal_error (__FILE__
, __LINE__
,
4443 "hw_bp_to_z: bad watchpoint type %d", type
);
4448 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
4450 struct remote_state
*rs
= get_remote_state ();
4451 char *buf
= alloca (rs
->remote_packet_size
);
4453 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
4455 if (remote_protocol_Z
[packet
].support
== PACKET_DISABLE
)
4456 error ("Can't set hardware watchpoints without the '%s' (%s) packet\n",
4457 remote_protocol_Z
[packet
].name
,
4458 remote_protocol_Z
[packet
].title
);
4460 sprintf (buf
, "Z%x,", packet
);
4461 p
= strchr (buf
, '\0');
4462 addr
= remote_address_masked (addr
);
4463 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4464 sprintf (p
, ",%x", len
);
4467 getpkt (buf
, (rs
->remote_packet_size
), 0);
4469 switch (packet_ok (buf
, &remote_protocol_Z
[packet
]))
4472 case PACKET_UNKNOWN
:
4477 internal_error (__FILE__
, __LINE__
,
4478 "remote_insert_watchpoint: reached end of function");
4483 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
4485 struct remote_state
*rs
= get_remote_state ();
4486 char *buf
= alloca (rs
->remote_packet_size
);
4488 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
4490 if (remote_protocol_Z
[packet
].support
== PACKET_DISABLE
)
4491 error ("Can't clear hardware watchpoints without the '%s' (%s) packet\n",
4492 remote_protocol_Z
[packet
].name
,
4493 remote_protocol_Z
[packet
].title
);
4495 sprintf (buf
, "z%x,", packet
);
4496 p
= strchr (buf
, '\0');
4497 addr
= remote_address_masked (addr
);
4498 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4499 sprintf (p
, ",%x", len
);
4501 getpkt (buf
, (rs
->remote_packet_size
), 0);
4503 switch (packet_ok (buf
, &remote_protocol_Z
[packet
]))
4506 case PACKET_UNKNOWN
:
4511 internal_error (__FILE__
, __LINE__
,
4512 "remote_remove_watchpoint: reached end of function");
4516 int remote_hw_watchpoint_limit
= -1;
4517 int remote_hw_breakpoint_limit
= -1;
4520 remote_check_watch_resources (int type
, int cnt
, int ot
)
4522 if (type
== bp_hardware_breakpoint
)
4524 if (remote_hw_breakpoint_limit
== 0)
4526 else if (remote_hw_breakpoint_limit
< 0)
4528 else if (cnt
<= remote_hw_breakpoint_limit
)
4533 if (remote_hw_watchpoint_limit
== 0)
4535 else if (remote_hw_watchpoint_limit
< 0)
4539 else if (cnt
<= remote_hw_watchpoint_limit
)
4546 remote_stopped_by_watchpoint (void)
4548 return remote_stopped_by_watchpoint_p
;
4551 extern int stepped_after_stopped_by_watchpoint
;
4554 remote_stopped_data_address (void)
4556 if (remote_stopped_by_watchpoint ()
4557 || stepped_after_stopped_by_watchpoint
)
4558 return remote_watch_data_address
;
4559 return (CORE_ADDR
)0;
4564 remote_insert_hw_breakpoint (CORE_ADDR addr
, char *shadow
)
4567 struct remote_state
*rs
= get_remote_state ();
4568 char *buf
= alloca (rs
->remote_packet_size
);
4571 /* The length field should be set to the size of a breakpoint
4574 BREAKPOINT_FROM_PC (&addr
, &len
);
4576 if (remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].support
== PACKET_DISABLE
)
4577 error ("Can't set hardware breakpoint without the '%s' (%s) packet\n",
4578 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].name
,
4579 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].title
);
4585 addr
= remote_address_masked (addr
);
4586 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4587 sprintf (p
, ",%x", len
);
4590 getpkt (buf
, (rs
->remote_packet_size
), 0);
4592 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]))
4595 case PACKET_UNKNOWN
:
4600 internal_error (__FILE__
, __LINE__
,
4601 "remote_insert_hw_breakpoint: reached end of function");
4606 remote_remove_hw_breakpoint (CORE_ADDR addr
, char *shadow
)
4609 struct remote_state
*rs
= get_remote_state ();
4610 char *buf
= alloca (rs
->remote_packet_size
);
4613 /* The length field should be set to the size of a breakpoint
4616 BREAKPOINT_FROM_PC (&addr
, &len
);
4618 if (remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].support
== PACKET_DISABLE
)
4619 error ("Can't clear hardware breakpoint without the '%s' (%s) packet\n",
4620 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].name
,
4621 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].title
);
4627 addr
= remote_address_masked (addr
);
4628 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4629 sprintf (p
, ",%x", len
);
4632 getpkt (buf
, (rs
->remote_packet_size
), 0);
4634 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]))
4637 case PACKET_UNKNOWN
:
4642 internal_error (__FILE__
, __LINE__
,
4643 "remote_remove_hw_breakpoint: reached end of function");
4646 /* Some targets are only capable of doing downloads, and afterwards
4647 they switch to the remote serial protocol. This function provides
4648 a clean way to get from the download target to the remote target.
4649 It's basically just a wrapper so that we don't have to expose any
4650 of the internal workings of remote.c.
4652 Prior to calling this routine, you should shutdown the current
4653 target code, else you will get the "A program is being debugged
4654 already..." message. Usually a call to pop_target() suffices. */
4657 push_remote_target (char *name
, int from_tty
)
4659 printf_filtered ("Switching to remote protocol\n");
4660 remote_open (name
, from_tty
);
4663 /* Table used by the crc32 function to calcuate the checksum. */
4665 static unsigned long crc32_table
[256] =
4668 static unsigned long
4669 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
4671 if (!crc32_table
[1])
4673 /* Initialize the CRC table and the decoding table. */
4677 for (i
= 0; i
< 256; i
++)
4679 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
4680 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
4687 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
4693 /* compare-sections command
4695 With no arguments, compares each loadable section in the exec bfd
4696 with the same memory range on the target, and reports mismatches.
4697 Useful for verifying the image on the target against the exec file.
4698 Depends on the target understanding the new "qCRC:" request. */
4700 /* FIXME: cagney/1999-10-26: This command should be broken down into a
4701 target method (target verify memory) and generic version of the
4702 actual command. This will allow other high-level code (especially
4703 generic_load()) to make use of this target functionality. */
4706 compare_sections_command (char *args
, int from_tty
)
4708 struct remote_state
*rs
= get_remote_state ();
4710 unsigned long host_crc
, target_crc
;
4711 extern bfd
*exec_bfd
;
4712 struct cleanup
*old_chain
;
4715 const char *sectname
;
4716 char *buf
= alloca (rs
->remote_packet_size
);
4723 error ("command cannot be used without an exec file");
4724 if (!current_target
.to_shortname
||
4725 strcmp (current_target
.to_shortname
, "remote") != 0)
4726 error ("command can only be used with remote target");
4728 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
4730 if (!(s
->flags
& SEC_LOAD
))
4731 continue; /* skip non-loadable section */
4733 size
= bfd_get_section_size_before_reloc (s
);
4735 continue; /* skip zero-length section */
4737 sectname
= bfd_get_section_name (exec_bfd
, s
);
4738 if (args
&& strcmp (args
, sectname
) != 0)
4739 continue; /* not the section selected by user */
4741 matched
= 1; /* do this section */
4743 /* FIXME: assumes lma can fit into long */
4744 sprintf (buf
, "qCRC:%lx,%lx", (long) lma
, (long) size
);
4747 /* be clever; compute the host_crc before waiting for target reply */
4748 sectdata
= xmalloc (size
);
4749 old_chain
= make_cleanup (xfree
, sectdata
);
4750 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
4751 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
4753 getpkt (buf
, (rs
->remote_packet_size
), 0);
4755 error ("target memory fault, section %s, range 0x%s -- 0x%s",
4756 sectname
, paddr (lma
), paddr (lma
+ size
));
4758 error ("remote target does not support this operation");
4760 for (target_crc
= 0, tmp
= &buf
[1]; *tmp
; tmp
++)
4761 target_crc
= target_crc
* 16 + fromhex (*tmp
);
4763 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
4764 sectname
, paddr (lma
), paddr (lma
+ size
));
4765 if (host_crc
== target_crc
)
4766 printf_filtered ("matched.\n");
4769 printf_filtered ("MIS-MATCHED!\n");
4773 do_cleanups (old_chain
);
4776 warning ("One or more sections of the remote executable does not match\n\
4777 the loaded file\n");
4778 if (args
&& !matched
)
4779 printf_filtered ("No loaded section named '%s'.\n", args
);
4783 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
4784 const char *annex
, void *readbuf
, const void *writebuf
,
4785 ULONGEST offset
, LONGEST len
)
4787 struct remote_state
*rs
= get_remote_state ();
4789 char *buf2
= alloca (rs
->remote_packet_size
);
4790 char *p2
= &buf2
[0];
4793 /* Only handle reads. */
4794 if (writebuf
!= NULL
|| readbuf
== NULL
)
4797 /* Map pre-existing objects onto letters. DO NOT do this for new
4798 objects!!! Instead specify new query packets. */
4801 case TARGET_OBJECT_KOD
:
4804 case TARGET_OBJECT_AVR
:
4808 case TARGET_OBJECT_AUXV
:
4809 if (remote_protocol_qPart_auxv
.support
!= PACKET_DISABLE
)
4811 unsigned int total
= 0;
4814 LONGEST n
= min ((rs
->remote_packet_size
- 2) / 2, len
);
4815 snprintf (buf2
, rs
->remote_packet_size
,
4816 "qPart:auxv:read::%s,%s",
4817 phex_nz (offset
, sizeof offset
),
4818 phex_nz (n
, sizeof n
));
4821 return total
> 0 ? total
: i
;
4823 getpkt (buf2
, rs
->remote_packet_size
, 0);
4824 if (packet_ok (buf2
, &remote_protocol_qPart_auxv
) != PACKET_OK
)
4825 return total
> 0 ? total
: -1;
4826 if (buf2
[0] == 'O' && buf2
[1] == 'K' && buf2
[2] == '\0')
4827 break; /* Got EOF indicator. */
4828 /* Got some data. */
4829 i
= hex2bin (buf2
, readbuf
, len
);
4832 readbuf
= (void *) ((char *) readbuf
+ i
);
4846 /* Note: a zero OFFSET and LEN can be used to query the minimum
4848 if (offset
== 0 && len
== 0)
4849 return (rs
->remote_packet_size
);
4850 /* Minimum outbuf size is (rs->remote_packet_size) - if bufsiz is
4851 not large enough let the caller. */
4852 if (len
< (rs
->remote_packet_size
))
4854 len
= rs
->remote_packet_size
;
4856 /* except for querying the minimum buffer size, target must be open */
4858 error ("remote query is only available after target open");
4860 gdb_assert (annex
!= NULL
);
4861 gdb_assert (readbuf
!= NULL
);
4866 /* we used one buffer char for the remote protocol q command and another
4867 for the query type. As the remote protocol encapsulation uses 4 chars
4868 plus one extra in case we are debugging (remote_debug),
4869 we have PBUFZIZ - 7 left to pack the query string */
4871 while (annex
[i
] && (i
< ((rs
->remote_packet_size
) - 8)))
4873 /* Bad caller may have sent forbidden characters. */
4874 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
4879 gdb_assert (annex
[i
] == '\0');
4885 getpkt (readbuf
, len
, 0);
4887 return strlen (readbuf
);
4891 remote_rcmd (char *command
,
4892 struct ui_file
*outbuf
)
4894 struct remote_state
*rs
= get_remote_state ();
4896 char *buf
= alloca (rs
->remote_packet_size
);
4900 error ("remote rcmd is only available after target open");
4902 /* Send a NULL command across as an empty command */
4903 if (command
== NULL
)
4906 /* The query prefix */
4907 strcpy (buf
, "qRcmd,");
4908 p
= strchr (buf
, '\0');
4910 if ((strlen (buf
) + strlen (command
) * 2 + 8/*misc*/) > (rs
->remote_packet_size
))
4911 error ("\"monitor\" command ``%s'' is too long\n", command
);
4913 /* Encode the actual command */
4914 bin2hex (command
, p
, 0);
4916 if (putpkt (buf
) < 0)
4917 error ("Communication problem with target\n");
4919 /* get/display the response */
4922 /* XXX - see also tracepoint.c:remote_get_noisy_reply() */
4924 getpkt (buf
, (rs
->remote_packet_size
), 0);
4926 error ("Target does not support this command\n");
4927 if (buf
[0] == 'O' && buf
[1] != 'K')
4929 remote_console_output (buf
+ 1); /* 'O' message from stub */
4932 if (strcmp (buf
, "OK") == 0)
4934 if (strlen (buf
) == 3 && buf
[0] == 'E'
4935 && isdigit (buf
[1]) && isdigit (buf
[2]))
4937 error ("Protocol error with Rcmd");
4939 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
4941 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
4942 fputc_unfiltered (c
, outbuf
);
4949 packet_command (char *args
, int from_tty
)
4951 struct remote_state
*rs
= get_remote_state ();
4952 char *buf
= alloca (rs
->remote_packet_size
);
4955 error ("command can only be used with remote target");
4958 error ("remote-packet command requires packet text as argument");
4960 puts_filtered ("sending: ");
4961 print_packet (args
);
4962 puts_filtered ("\n");
4965 getpkt (buf
, (rs
->remote_packet_size
), 0);
4966 puts_filtered ("received: ");
4968 puts_filtered ("\n");
4972 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------------- */
4974 static void display_thread_info (struct gdb_ext_thread_info
*info
);
4976 static void threadset_test_cmd (char *cmd
, int tty
);
4978 static void threadalive_test (char *cmd
, int tty
);
4980 static void threadlist_test_cmd (char *cmd
, int tty
);
4982 int get_and_display_threadinfo (threadref
* ref
);
4984 static void threadinfo_test_cmd (char *cmd
, int tty
);
4986 static int thread_display_step (threadref
* ref
, void *context
);
4988 static void threadlist_update_test_cmd (char *cmd
, int tty
);
4990 static void init_remote_threadtests (void);
4992 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid */
4995 threadset_test_cmd (char *cmd
, int tty
)
4997 int sample_thread
= SAMPLE_THREAD
;
4999 printf_filtered ("Remote threadset test\n");
5000 set_thread (sample_thread
, 1);
5005 threadalive_test (char *cmd
, int tty
)
5007 int sample_thread
= SAMPLE_THREAD
;
5009 if (remote_thread_alive (pid_to_ptid (sample_thread
)))
5010 printf_filtered ("PASS: Thread alive test\n");
5012 printf_filtered ("FAIL: Thread alive test\n");
5015 void output_threadid (char *title
, threadref
* ref
);
5018 output_threadid (char *title
, threadref
*ref
)
5022 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex */
5024 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
5028 threadlist_test_cmd (char *cmd
, int tty
)
5031 threadref nextthread
;
5032 int done
, result_count
;
5033 threadref threadlist
[3];
5035 printf_filtered ("Remote Threadlist test\n");
5036 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
5037 &result_count
, &threadlist
[0]))
5038 printf_filtered ("FAIL: threadlist test\n");
5041 threadref
*scan
= threadlist
;
5042 threadref
*limit
= scan
+ result_count
;
5044 while (scan
< limit
)
5045 output_threadid (" thread ", scan
++);
5050 display_thread_info (struct gdb_ext_thread_info
*info
)
5052 output_threadid ("Threadid: ", &info
->threadid
);
5053 printf_filtered ("Name: %s\n ", info
->shortname
);
5054 printf_filtered ("State: %s\n", info
->display
);
5055 printf_filtered ("other: %s\n\n", info
->more_display
);
5059 get_and_display_threadinfo (threadref
*ref
)
5063 struct gdb_ext_thread_info threadinfo
;
5065 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
5066 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
5067 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
5068 display_thread_info (&threadinfo
);
5073 threadinfo_test_cmd (char *cmd
, int tty
)
5075 int athread
= SAMPLE_THREAD
;
5079 int_to_threadref (&thread
, athread
);
5080 printf_filtered ("Remote Threadinfo test\n");
5081 if (!get_and_display_threadinfo (&thread
))
5082 printf_filtered ("FAIL cannot get thread info\n");
5086 thread_display_step (threadref
*ref
, void *context
)
5088 /* output_threadid(" threadstep ",ref); *//* simple test */
5089 return get_and_display_threadinfo (ref
);
5093 threadlist_update_test_cmd (char *cmd
, int tty
)
5095 printf_filtered ("Remote Threadlist update test\n");
5096 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
5100 init_remote_threadtests (void)
5102 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
5103 "Fetch and print the remote list of thread identifiers, one pkt only");
5104 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
5105 "Fetch and display info about one thread");
5106 add_com ("tset", class_obscure
, threadset_test_cmd
,
5107 "Test setting to a different thread");
5108 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
5109 "Iterate through updating all remote thread info");
5110 add_com ("talive", class_obscure
, threadalive_test
,
5111 " Remote thread alive test ");
5116 /* Convert a thread ID to a string. Returns the string in a static
5120 remote_pid_to_str (ptid_t ptid
)
5122 static char buf
[30];
5124 sprintf (buf
, "Thread %d", PIDGET (ptid
));
5129 init_remote_ops (void)
5131 remote_ops
.to_shortname
= "remote";
5132 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
5134 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5135 Specify the serial device it is connected to\n\
5136 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
5137 remote_ops
.to_open
= remote_open
;
5138 remote_ops
.to_close
= remote_close
;
5139 remote_ops
.to_detach
= remote_detach
;
5140 remote_ops
.to_disconnect
= remote_disconnect
;
5141 remote_ops
.to_resume
= remote_resume
;
5142 remote_ops
.to_wait
= remote_wait
;
5143 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
5144 remote_ops
.to_store_registers
= remote_store_registers
;
5145 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5146 remote_ops
.to_xfer_memory
= remote_xfer_memory
;
5147 remote_ops
.to_files_info
= remote_files_info
;
5148 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5149 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5150 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
5151 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
5152 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
5153 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
5154 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
5155 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
5156 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
5157 remote_ops
.to_kill
= remote_kill
;
5158 remote_ops
.to_load
= generic_load
;
5159 remote_ops
.to_mourn_inferior
= remote_mourn
;
5160 remote_ops
.to_thread_alive
= remote_thread_alive
;
5161 remote_ops
.to_find_new_threads
= remote_threads_info
;
5162 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
5163 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5164 remote_ops
.to_stop
= remote_stop
;
5165 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
5166 remote_ops
.to_rcmd
= remote_rcmd
;
5167 remote_ops
.to_stratum
= process_stratum
;
5168 remote_ops
.to_has_all_memory
= 1;
5169 remote_ops
.to_has_memory
= 1;
5170 remote_ops
.to_has_stack
= 1;
5171 remote_ops
.to_has_registers
= 1;
5172 remote_ops
.to_has_execution
= 1;
5173 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
5174 remote_ops
.to_magic
= OPS_MAGIC
;
5177 /* Set up the extended remote vector by making a copy of the standard
5178 remote vector and adding to it. */
5181 init_extended_remote_ops (void)
5183 extended_remote_ops
= remote_ops
;
5185 extended_remote_ops
.to_shortname
= "extended-remote";
5186 extended_remote_ops
.to_longname
=
5187 "Extended remote serial target in gdb-specific protocol";
5188 extended_remote_ops
.to_doc
=
5189 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5190 Specify the serial device it is connected to (e.g. /dev/ttya).",
5191 extended_remote_ops
.to_open
= extended_remote_open
;
5192 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
5193 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
5197 remote_can_async_p (void)
5199 /* We're async whenever the serial device is. */
5200 return (current_target
.to_async_mask_value
) && serial_can_async_p (remote_desc
);
5204 remote_is_async_p (void)
5206 /* We're async whenever the serial device is. */
5207 return (current_target
.to_async_mask_value
) && serial_is_async_p (remote_desc
);
5210 /* Pass the SERIAL event on and up to the client. One day this code
5211 will be able to delay notifying the client of an event until the
5212 point where an entire packet has been received. */
5214 static void (*async_client_callback
) (enum inferior_event_type event_type
, void *context
);
5215 static void *async_client_context
;
5216 static serial_event_ftype remote_async_serial_handler
;
5219 remote_async_serial_handler (struct serial
*scb
, void *context
)
5221 /* Don't propogate error information up to the client. Instead let
5222 the client find out about the error by querying the target. */
5223 async_client_callback (INF_REG_EVENT
, async_client_context
);
5227 remote_async (void (*callback
) (enum inferior_event_type event_type
, void *context
), void *context
)
5229 if (current_target
.to_async_mask_value
== 0)
5230 internal_error (__FILE__
, __LINE__
,
5231 "Calling remote_async when async is masked");
5233 if (callback
!= NULL
)
5235 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
5236 async_client_callback
= callback
;
5237 async_client_context
= context
;
5240 serial_async (remote_desc
, NULL
, NULL
);
5243 /* Target async and target extended-async.
5245 This are temporary targets, until it is all tested. Eventually
5246 async support will be incorporated int the usual 'remote'
5250 init_remote_async_ops (void)
5252 remote_async_ops
.to_shortname
= "async";
5253 remote_async_ops
.to_longname
= "Remote serial target in async version of the gdb-specific protocol";
5254 remote_async_ops
.to_doc
=
5255 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5256 Specify the serial device it is connected to (e.g. /dev/ttya).";
5257 remote_async_ops
.to_open
= remote_async_open
;
5258 remote_async_ops
.to_close
= remote_close
;
5259 remote_async_ops
.to_detach
= remote_detach
;
5260 remote_async_ops
.to_disconnect
= remote_disconnect
;
5261 remote_async_ops
.to_resume
= remote_async_resume
;
5262 remote_async_ops
.to_wait
= remote_async_wait
;
5263 remote_async_ops
.to_fetch_registers
= remote_fetch_registers
;
5264 remote_async_ops
.to_store_registers
= remote_store_registers
;
5265 remote_async_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5266 remote_async_ops
.to_xfer_memory
= remote_xfer_memory
;
5267 remote_async_ops
.to_files_info
= remote_files_info
;
5268 remote_async_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5269 remote_async_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5270 remote_async_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
5271 remote_async_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
5272 remote_async_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
5273 remote_async_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
5274 remote_async_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
5275 remote_async_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
5276 remote_async_ops
.to_stopped_data_address
= remote_stopped_data_address
;
5277 remote_async_ops
.to_terminal_inferior
= remote_async_terminal_inferior
;
5278 remote_async_ops
.to_terminal_ours
= remote_async_terminal_ours
;
5279 remote_async_ops
.to_kill
= remote_async_kill
;
5280 remote_async_ops
.to_load
= generic_load
;
5281 remote_async_ops
.to_mourn_inferior
= remote_async_mourn
;
5282 remote_async_ops
.to_thread_alive
= remote_thread_alive
;
5283 remote_async_ops
.to_find_new_threads
= remote_threads_info
;
5284 remote_async_ops
.to_pid_to_str
= remote_pid_to_str
;
5285 remote_async_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5286 remote_async_ops
.to_stop
= remote_stop
;
5287 remote_async_ops
.to_xfer_partial
= remote_xfer_partial
;
5288 remote_async_ops
.to_rcmd
= remote_rcmd
;
5289 remote_async_ops
.to_stratum
= process_stratum
;
5290 remote_async_ops
.to_has_all_memory
= 1;
5291 remote_async_ops
.to_has_memory
= 1;
5292 remote_async_ops
.to_has_stack
= 1;
5293 remote_async_ops
.to_has_registers
= 1;
5294 remote_async_ops
.to_has_execution
= 1;
5295 remote_async_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
5296 remote_async_ops
.to_can_async_p
= remote_can_async_p
;
5297 remote_async_ops
.to_is_async_p
= remote_is_async_p
;
5298 remote_async_ops
.to_async
= remote_async
;
5299 remote_async_ops
.to_async_mask_value
= 1;
5300 remote_async_ops
.to_magic
= OPS_MAGIC
;
5303 /* Set up the async extended remote vector by making a copy of the standard
5304 remote vector and adding to it. */
5307 init_extended_async_remote_ops (void)
5309 extended_async_remote_ops
= remote_async_ops
;
5311 extended_async_remote_ops
.to_shortname
= "extended-async";
5312 extended_async_remote_ops
.to_longname
=
5313 "Extended remote serial target in async gdb-specific protocol";
5314 extended_async_remote_ops
.to_doc
=
5315 "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
5316 Specify the serial device it is connected to (e.g. /dev/ttya).",
5317 extended_async_remote_ops
.to_open
= extended_remote_async_open
;
5318 extended_async_remote_ops
.to_create_inferior
= extended_remote_async_create_inferior
;
5319 extended_async_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
5323 set_remote_cmd (char *args
, int from_tty
)
5328 show_remote_cmd (char *args
, int from_tty
)
5330 /* FIXME: cagney/2002-06-15: This function should iterate over
5331 remote_show_cmdlist for a list of sub commands to show. */
5332 show_remote_protocol_Z_packet_cmd (args
, from_tty
, NULL
);
5333 show_remote_protocol_P_packet_cmd (args
, from_tty
, NULL
);
5334 show_remote_protocol_qSymbol_packet_cmd (args
, from_tty
, NULL
);
5335 show_remote_protocol_vcont_packet_cmd (args
, from_tty
, NULL
);
5336 show_remote_protocol_binary_download_cmd (args
, from_tty
, NULL
);
5337 show_remote_protocol_qPart_auxv_packet_cmd (args
, from_tty
, NULL
);
5341 build_remote_gdbarch_data (void)
5343 remote_address_size
= TARGET_ADDR_BIT
;
5346 /* Saved pointer to previous owner of the new_objfile event. */
5347 static void (*remote_new_objfile_chain
) (struct objfile
*);
5349 /* Function to be called whenever a new objfile (shlib) is detected. */
5351 remote_new_objfile (struct objfile
*objfile
)
5353 if (remote_desc
!= 0) /* Have a remote connection */
5355 remote_check_symbols (objfile
);
5357 /* Call predecessor on chain, if any. */
5358 if (remote_new_objfile_chain
!= 0 &&
5360 remote_new_objfile_chain (objfile
);
5364 _initialize_remote (void)
5366 static struct cmd_list_element
*remote_set_cmdlist
;
5367 static struct cmd_list_element
*remote_show_cmdlist
;
5368 struct cmd_list_element
*tmpcmd
;
5370 /* architecture specific data */
5371 remote_gdbarch_data_handle
= gdbarch_data_register_post_init (init_remote_state
);
5373 /* Old tacky stuff. NOTE: This comes after the remote protocol so
5374 that the remote protocol has been initialized. */
5375 DEPRECATED_REGISTER_GDBARCH_SWAP (remote_address_size
);
5376 deprecated_register_gdbarch_swap (NULL
, 0, build_remote_gdbarch_data
);
5379 add_target (&remote_ops
);
5381 init_extended_remote_ops ();
5382 add_target (&extended_remote_ops
);
5384 init_remote_async_ops ();
5385 add_target (&remote_async_ops
);
5387 init_extended_async_remote_ops ();
5388 add_target (&extended_async_remote_ops
);
5390 /* Hook into new objfile notification. */
5391 remote_new_objfile_chain
= deprecated_target_new_objfile_hook
;
5392 deprecated_target_new_objfile_hook
= remote_new_objfile
;
5395 init_remote_threadtests ();
5398 /* set/show remote ... */
5400 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, "\
5401 Remote protocol specific variables\n\
5402 Configure various remote-protocol specific variables such as\n\
5403 the packets being used",
5404 &remote_set_cmdlist
, "set remote ",
5405 0/*allow-unknown*/, &setlist
);
5406 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, "\
5407 Remote protocol specific variables\n\
5408 Configure various remote-protocol specific variables such as\n\
5409 the packets being used",
5410 &remote_show_cmdlist
, "show remote ",
5411 0/*allow-unknown*/, &showlist
);
5413 add_cmd ("compare-sections", class_obscure
, compare_sections_command
,
5414 "Compare section data on target to the exec file.\n\
5415 Argument is a single section name (default: all loaded sections).",
5418 add_cmd ("packet", class_maintenance
, packet_command
,
5419 "Send an arbitrary packet to a remote target.\n\
5420 maintenance packet TEXT\n\
5421 If GDB is talking to an inferior via the GDB serial protocol, then\n\
5422 this command sends the string TEXT to the inferior, and displays the\n\
5423 response packet. GDB supplies the initial `$' character, and the\n\
5424 terminating `#' character and checksum.",
5427 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
,
5428 "Set whether to send break if interrupted.\n",
5429 "Show whether to send break if interrupted.\n",
5431 &setlist
, &showlist
);
5433 /* Install commands for configuring memory read/write packets. */
5435 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
,
5436 "Set the maximum number of bytes per memory write packet (deprecated).\n",
5438 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
,
5439 "Show the maximum number of bytes per memory write packet (deprecated).\n",
5441 add_cmd ("memory-write-packet-size", no_class
,
5442 set_memory_write_packet_size
,
5443 "Set the maximum number of bytes per memory-write packet.\n"
5444 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5445 "default packet size. The actual limit is further reduced\n"
5446 "dependent on the target. Specify ``fixed'' to disable the\n"
5447 "further restriction and ``limit'' to enable that restriction\n",
5448 &remote_set_cmdlist
);
5449 add_cmd ("memory-read-packet-size", no_class
,
5450 set_memory_read_packet_size
,
5451 "Set the maximum number of bytes per memory-read packet.\n"
5452 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5453 "default packet size. The actual limit is further reduced\n"
5454 "dependent on the target. Specify ``fixed'' to disable the\n"
5455 "further restriction and ``limit'' to enable that restriction\n",
5456 &remote_set_cmdlist
);
5457 add_cmd ("memory-write-packet-size", no_class
,
5458 show_memory_write_packet_size
,
5459 "Show the maximum number of bytes per memory-write packet.\n",
5460 &remote_show_cmdlist
);
5461 add_cmd ("memory-read-packet-size", no_class
,
5462 show_memory_read_packet_size
,
5463 "Show the maximum number of bytes per memory-read packet.\n",
5464 &remote_show_cmdlist
);
5466 add_setshow_cmd ("hardware-watchpoint-limit", no_class
,
5467 var_zinteger
, &remote_hw_watchpoint_limit
, "\
5468 Set the maximum number of target hardware watchpoints.\n\
5469 Specify a negative limit for unlimited.", "\
5470 Show the maximum number of target hardware watchpoints.\n",
5471 NULL
, NULL
, &remote_set_cmdlist
, &remote_show_cmdlist
);
5472 add_setshow_cmd ("hardware-breakpoint-limit", no_class
,
5473 var_zinteger
, &remote_hw_breakpoint_limit
, "\
5474 Set the maximum number of target hardware breakpoints.\n\
5475 Specify a negative limit for unlimited.", "\
5476 Show the maximum number of target hardware breakpoints.\n",
5477 NULL
, NULL
, &remote_set_cmdlist
, &remote_show_cmdlist
);
5480 (add_set_cmd ("remoteaddresssize", class_obscure
,
5481 var_integer
, (char *) &remote_address_size
,
5482 "Set the maximum size of the address (in bits) \
5483 in a memory packet.\n",
5487 add_packet_config_cmd (&remote_protocol_binary_download
,
5488 "X", "binary-download",
5489 set_remote_protocol_binary_download_cmd
,
5490 show_remote_protocol_binary_download_cmd
,
5491 &remote_set_cmdlist
, &remote_show_cmdlist
,
5494 /* XXXX - should ``set remotebinarydownload'' be retained for
5497 (add_set_cmd ("remotebinarydownload", no_class
,
5498 var_boolean
, (char *) &remote_binary_download
,
5499 "Set binary downloads.\n", &setlist
),
5503 add_packet_config_cmd (&remote_protocol_vcont
,
5504 "vCont", "verbose-resume",
5505 set_remote_protocol_vcont_packet_cmd
,
5506 show_remote_protocol_vcont_packet_cmd
,
5507 &remote_set_cmdlist
, &remote_show_cmdlist
,
5510 add_packet_config_cmd (&remote_protocol_qSymbol
,
5511 "qSymbol", "symbol-lookup",
5512 set_remote_protocol_qSymbol_packet_cmd
,
5513 show_remote_protocol_qSymbol_packet_cmd
,
5514 &remote_set_cmdlist
, &remote_show_cmdlist
,
5517 add_packet_config_cmd (&remote_protocol_P
,
5518 "P", "set-register",
5519 set_remote_protocol_P_packet_cmd
,
5520 show_remote_protocol_P_packet_cmd
,
5521 &remote_set_cmdlist
, &remote_show_cmdlist
,
5524 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
],
5525 "Z0", "software-breakpoint",
5526 set_remote_protocol_Z_software_bp_packet_cmd
,
5527 show_remote_protocol_Z_software_bp_packet_cmd
,
5528 &remote_set_cmdlist
, &remote_show_cmdlist
,
5531 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
],
5532 "Z1", "hardware-breakpoint",
5533 set_remote_protocol_Z_hardware_bp_packet_cmd
,
5534 show_remote_protocol_Z_hardware_bp_packet_cmd
,
5535 &remote_set_cmdlist
, &remote_show_cmdlist
,
5538 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_WRITE_WP
],
5539 "Z2", "write-watchpoint",
5540 set_remote_protocol_Z_write_wp_packet_cmd
,
5541 show_remote_protocol_Z_write_wp_packet_cmd
,
5542 &remote_set_cmdlist
, &remote_show_cmdlist
,
5545 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_READ_WP
],
5546 "Z3", "read-watchpoint",
5547 set_remote_protocol_Z_read_wp_packet_cmd
,
5548 show_remote_protocol_Z_read_wp_packet_cmd
,
5549 &remote_set_cmdlist
, &remote_show_cmdlist
,
5552 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
],
5553 "Z4", "access-watchpoint",
5554 set_remote_protocol_Z_access_wp_packet_cmd
,
5555 show_remote_protocol_Z_access_wp_packet_cmd
,
5556 &remote_set_cmdlist
, &remote_show_cmdlist
,
5559 add_packet_config_cmd (&remote_protocol_qPart_auxv
,
5560 "qPart_auxv", "read-aux-vector",
5561 set_remote_protocol_qPart_auxv_packet_cmd
,
5562 show_remote_protocol_qPart_auxv_packet_cmd
,
5563 &remote_set_cmdlist
, &remote_show_cmdlist
,
5566 /* Keep the old ``set remote Z-packet ...'' working. */
5567 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
5568 &remote_Z_packet_detect
, "\
5569 Set use of remote protocol `Z' packets",
5570 "Show use of remote protocol `Z' packets ",
5571 set_remote_protocol_Z_packet_cmd
,
5572 show_remote_protocol_Z_packet_cmd
,
5573 &remote_set_cmdlist
, &remote_show_cmdlist
);
5575 /* Eventually initialize fileio. See fileio.c */
5576 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);