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 'e' (step over range) request? */
778 static struct packet_config remote_protocol_e
;
781 set_remote_protocol_e_packet_cmd (char *args
, int from_tty
,
782 struct cmd_list_element
*c
)
784 update_packet_config (&remote_protocol_e
);
788 show_remote_protocol_e_packet_cmd (char *args
, int from_tty
,
789 struct cmd_list_element
*c
)
791 show_packet_config_cmd (&remote_protocol_e
);
795 /* Should we try the 'E' (step over range / w signal #) request? */
796 static struct packet_config remote_protocol_E
;
799 set_remote_protocol_E_packet_cmd (char *args
, int from_tty
,
800 struct cmd_list_element
*c
)
802 update_packet_config (&remote_protocol_E
);
806 show_remote_protocol_E_packet_cmd (char *args
, int from_tty
,
807 struct cmd_list_element
*c
)
809 show_packet_config_cmd (&remote_protocol_E
);
813 /* Should we try the 'P' (set register) request? */
815 static struct packet_config remote_protocol_P
;
818 set_remote_protocol_P_packet_cmd (char *args
, int from_tty
,
819 struct cmd_list_element
*c
)
821 update_packet_config (&remote_protocol_P
);
825 show_remote_protocol_P_packet_cmd (char *args
, int from_tty
,
826 struct cmd_list_element
*c
)
828 show_packet_config_cmd (&remote_protocol_P
);
831 /* Should we try one of the 'Z' requests? */
835 Z_PACKET_SOFTWARE_BP
,
836 Z_PACKET_HARDWARE_BP
,
843 static struct packet_config remote_protocol_Z
[NR_Z_PACKET_TYPES
];
845 /* FIXME: Instead of having all these boiler plate functions, the
846 command callback should include a context argument. */
849 set_remote_protocol_Z_software_bp_packet_cmd (char *args
, int from_tty
,
850 struct cmd_list_element
*c
)
852 update_packet_config (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]);
856 show_remote_protocol_Z_software_bp_packet_cmd (char *args
, int from_tty
,
857 struct cmd_list_element
*c
)
859 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]);
863 set_remote_protocol_Z_hardware_bp_packet_cmd (char *args
, int from_tty
,
864 struct cmd_list_element
*c
)
866 update_packet_config (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]);
870 show_remote_protocol_Z_hardware_bp_packet_cmd (char *args
, int from_tty
,
871 struct cmd_list_element
*c
)
873 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]);
877 set_remote_protocol_Z_write_wp_packet_cmd (char *args
, int from_tty
,
878 struct cmd_list_element
*c
)
880 update_packet_config (&remote_protocol_Z
[Z_PACKET_WRITE_WP
]);
884 show_remote_protocol_Z_write_wp_packet_cmd (char *args
, int from_tty
,
885 struct cmd_list_element
*c
)
887 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_WRITE_WP
]);
891 set_remote_protocol_Z_read_wp_packet_cmd (char *args
, int from_tty
,
892 struct cmd_list_element
*c
)
894 update_packet_config (&remote_protocol_Z
[Z_PACKET_READ_WP
]);
898 show_remote_protocol_Z_read_wp_packet_cmd (char *args
, int from_tty
,
899 struct cmd_list_element
*c
)
901 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_READ_WP
]);
905 set_remote_protocol_Z_access_wp_packet_cmd (char *args
, int from_tty
,
906 struct cmd_list_element
*c
)
908 update_packet_config (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
]);
912 show_remote_protocol_Z_access_wp_packet_cmd (char *args
, int from_tty
,
913 struct cmd_list_element
*c
)
915 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
]);
918 /* For compatibility with older distributions. Provide a ``set remote
919 Z-packet ...'' command that updates all the Z packet types. */
921 static enum auto_boolean remote_Z_packet_detect
;
924 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
925 struct cmd_list_element
*c
)
928 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
930 remote_protocol_Z
[i
].detect
= remote_Z_packet_detect
;
931 update_packet_config (&remote_protocol_Z
[i
]);
936 show_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
937 struct cmd_list_element
*c
)
940 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
942 show_packet_config_cmd (&remote_protocol_Z
[i
]);
946 /* Should we try the 'X' (remote binary download) packet?
948 This variable (available to the user via "set remote X-packet")
949 dictates whether downloads are sent in binary (via the 'X' packet).
950 We assume that the stub can, and attempt to do it. This will be
951 cleared if the stub does not understand it. This switch is still
952 needed, though in cases when the packet is supported in the stub,
953 but the connection does not allow it (i.e., 7-bit serial connection
956 static struct packet_config remote_protocol_binary_download
;
958 /* Should we try the 'ThreadInfo' query packet?
960 This variable (NOT available to the user: auto-detect only!)
961 determines whether GDB will use the new, simpler "ThreadInfo"
962 query or the older, more complex syntax for thread queries.
963 This is an auto-detect variable (set to true at each connect,
964 and set to false when the target fails to recognize it). */
966 static int use_threadinfo_query
;
967 static int use_threadextra_query
;
970 set_remote_protocol_binary_download_cmd (char *args
,
972 struct cmd_list_element
*c
)
974 update_packet_config (&remote_protocol_binary_download
);
978 show_remote_protocol_binary_download_cmd (char *args
, int from_tty
,
979 struct cmd_list_element
*c
)
981 show_packet_config_cmd (&remote_protocol_binary_download
);
984 /* Should we try the 'qPart:auxv' (target auxiliary vector read) request? */
985 static struct packet_config remote_protocol_qPart_auxv
;
988 set_remote_protocol_qPart_auxv_packet_cmd (char *args
, int from_tty
,
989 struct cmd_list_element
*c
)
991 update_packet_config (&remote_protocol_qPart_auxv
);
995 show_remote_protocol_qPart_auxv_packet_cmd (char *args
, int from_tty
,
996 struct cmd_list_element
*c
)
998 show_packet_config_cmd (&remote_protocol_qPart_auxv
);
1002 /* Tokens for use by the asynchronous signal handlers for SIGINT */
1003 static void *sigint_remote_twice_token
;
1004 static void *sigint_remote_token
;
1006 /* These are pointers to hook functions that may be set in order to
1007 modify resume/wait behavior for a particular architecture. */
1009 void (*deprecated_target_resume_hook
) (void);
1010 void (*deprecated_target_wait_loop_hook
) (void);
1014 /* These are the threads which we last sent to the remote system.
1015 -1 for all or -2 for not sent yet. */
1016 static int general_thread
;
1017 static int continue_thread
;
1019 /* Call this function as a result of
1020 1) A halt indication (T packet) containing a thread id
1021 2) A direct query of currthread
1022 3) Successful execution of set thread
1026 record_currthread (int currthread
)
1028 general_thread
= currthread
;
1030 /* If this is a new thread, add it to GDB's thread list.
1031 If we leave it up to WFI to do this, bad things will happen. */
1032 if (!in_thread_list (pid_to_ptid (currthread
)))
1034 add_thread (pid_to_ptid (currthread
));
1035 ui_out_text (uiout
, "[New ");
1036 ui_out_text (uiout
, target_pid_to_str (pid_to_ptid (currthread
)));
1037 ui_out_text (uiout
, "]\n");
1041 #define MAGIC_NULL_PID 42000
1044 set_thread (int th
, int gen
)
1046 struct remote_state
*rs
= get_remote_state ();
1047 char *buf
= alloca (rs
->remote_packet_size
);
1048 int state
= gen
? general_thread
: continue_thread
;
1054 buf
[1] = gen
? 'g' : 'c';
1055 if (th
== MAGIC_NULL_PID
)
1061 sprintf (&buf
[2], "-%x", -th
);
1063 sprintf (&buf
[2], "%x", th
);
1065 getpkt (buf
, (rs
->remote_packet_size
), 0);
1067 general_thread
= th
;
1069 continue_thread
= th
;
1072 /* Return nonzero if the thread TH is still alive on the remote system. */
1075 remote_thread_alive (ptid_t ptid
)
1077 int tid
= PIDGET (ptid
);
1081 sprintf (buf
, "T-%08x", -tid
);
1083 sprintf (buf
, "T%08x", tid
);
1085 getpkt (buf
, sizeof (buf
), 0);
1086 return (buf
[0] == 'O' && buf
[1] == 'K');
1089 /* About these extended threadlist and threadinfo packets. They are
1090 variable length packets but, the fields within them are often fixed
1091 length. They are redundent enough to send over UDP as is the
1092 remote protocol in general. There is a matching unit test module
1095 #define OPAQUETHREADBYTES 8
1097 /* a 64 bit opaque identifier */
1098 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
1100 /* WARNING: This threadref data structure comes from the remote O.S., libstub
1101 protocol encoding, and remote.c. it is not particularly changable */
1103 /* Right now, the internal structure is int. We want it to be bigger.
1107 typedef int gdb_threadref
; /* internal GDB thread reference */
1109 /* gdb_ext_thread_info is an internal GDB data structure which is
1110 equivalint to the reply of the remote threadinfo packet */
1112 struct gdb_ext_thread_info
1114 threadref threadid
; /* External form of thread reference */
1115 int active
; /* Has state interesting to GDB? , regs, stack */
1116 char display
[256]; /* Brief state display, name, blocked/syspended */
1117 char shortname
[32]; /* To be used to name threads */
1118 char more_display
[256]; /* Long info, statistics, queue depth, whatever */
1121 /* The volume of remote transfers can be limited by submitting
1122 a mask containing bits specifying the desired information.
1123 Use a union of these values as the 'selection' parameter to
1124 get_thread_info. FIXME: Make these TAG names more thread specific.
1127 #define TAG_THREADID 1
1128 #define TAG_EXISTS 2
1129 #define TAG_DISPLAY 4
1130 #define TAG_THREADNAME 8
1131 #define TAG_MOREDISPLAY 16
1133 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES*2)
1135 char *unpack_varlen_hex (char *buff
, ULONGEST
*result
);
1137 static char *unpack_nibble (char *buf
, int *val
);
1139 static char *pack_nibble (char *buf
, int nibble
);
1141 static char *pack_hex_byte (char *pkt
, int /*unsigned char */ byte
);
1143 static char *unpack_byte (char *buf
, int *value
);
1145 static char *pack_int (char *buf
, int value
);
1147 static char *unpack_int (char *buf
, int *value
);
1149 static char *unpack_string (char *src
, char *dest
, int length
);
1151 static char *pack_threadid (char *pkt
, threadref
* id
);
1153 static char *unpack_threadid (char *inbuf
, threadref
* id
);
1155 void int_to_threadref (threadref
* id
, int value
);
1157 static int threadref_to_int (threadref
* ref
);
1159 static void copy_threadref (threadref
* dest
, threadref
* src
);
1161 static int threadmatch (threadref
* dest
, threadref
* src
);
1163 static char *pack_threadinfo_request (char *pkt
, int mode
, threadref
* id
);
1165 static int remote_unpack_thread_info_response (char *pkt
,
1166 threadref
* expectedref
,
1167 struct gdb_ext_thread_info
1171 static int remote_get_threadinfo (threadref
* threadid
, int fieldset
, /*TAG mask */
1172 struct gdb_ext_thread_info
*info
);
1174 static char *pack_threadlist_request (char *pkt
, int startflag
,
1176 threadref
* nextthread
);
1178 static int parse_threadlist_response (char *pkt
,
1180 threadref
* original_echo
,
1181 threadref
* resultlist
, int *doneflag
);
1183 static int remote_get_threadlist (int startflag
,
1184 threadref
* nextthread
,
1187 int *result_count
, threadref
* threadlist
);
1189 typedef int (*rmt_thread_action
) (threadref
* ref
, void *context
);
1191 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
1192 void *context
, int looplimit
);
1194 static int remote_newthread_step (threadref
* ref
, void *context
);
1196 /* encode 64 bits in 16 chars of hex */
1198 static const char hexchars
[] = "0123456789abcdef";
1201 ishex (int ch
, int *val
)
1203 if ((ch
>= 'a') && (ch
<= 'f'))
1205 *val
= ch
- 'a' + 10;
1208 if ((ch
>= 'A') && (ch
<= 'F'))
1210 *val
= ch
- 'A' + 10;
1213 if ((ch
>= '0') && (ch
<= '9'))
1224 if (ch
>= 'a' && ch
<= 'f')
1225 return ch
- 'a' + 10;
1226 if (ch
>= '0' && ch
<= '9')
1228 if (ch
>= 'A' && ch
<= 'F')
1229 return ch
- 'A' + 10;
1234 stub_unpack_int (char *buff
, int fieldlength
)
1241 nibble
= stubhex (*buff
++);
1245 retval
= retval
<< 4;
1251 unpack_varlen_hex (char *buff
, /* packet to parse */
1257 while (ishex (*buff
, &nibble
))
1260 retval
= retval
<< 4;
1261 retval
|= nibble
& 0x0f;
1268 unpack_nibble (char *buf
, int *val
)
1270 ishex (*buf
++, val
);
1275 pack_nibble (char *buf
, int nibble
)
1277 *buf
++ = hexchars
[(nibble
& 0x0f)];
1282 pack_hex_byte (char *pkt
, int byte
)
1284 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
1285 *pkt
++ = hexchars
[(byte
& 0xf)];
1290 unpack_byte (char *buf
, int *value
)
1292 *value
= stub_unpack_int (buf
, 2);
1297 pack_int (char *buf
, int value
)
1299 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
1300 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
1301 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
1302 buf
= pack_hex_byte (buf
, (value
& 0xff));
1307 unpack_int (char *buf
, int *value
)
1309 *value
= stub_unpack_int (buf
, 8);
1313 #if 0 /* currently unused, uncomment when needed */
1314 static char *pack_string (char *pkt
, char *string
);
1317 pack_string (char *pkt
, char *string
)
1322 len
= strlen (string
);
1324 len
= 200; /* Bigger than most GDB packets, junk??? */
1325 pkt
= pack_hex_byte (pkt
, len
);
1329 if ((ch
== '\0') || (ch
== '#'))
1330 ch
= '*'; /* Protect encapsulation */
1335 #endif /* 0 (unused) */
1338 unpack_string (char *src
, char *dest
, int length
)
1347 pack_threadid (char *pkt
, threadref
*id
)
1350 unsigned char *altid
;
1352 altid
= (unsigned char *) id
;
1353 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
1355 pkt
= pack_hex_byte (pkt
, *altid
++);
1361 unpack_threadid (char *inbuf
, threadref
*id
)
1364 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
1367 altref
= (char *) id
;
1369 while (inbuf
< limit
)
1371 x
= stubhex (*inbuf
++);
1372 y
= stubhex (*inbuf
++);
1373 *altref
++ = (x
<< 4) | y
;
1378 /* Externally, threadrefs are 64 bits but internally, they are still
1379 ints. This is due to a mismatch of specifications. We would like
1380 to use 64bit thread references internally. This is an adapter
1384 int_to_threadref (threadref
*id
, int value
)
1386 unsigned char *scan
;
1388 scan
= (unsigned char *) id
;
1394 *scan
++ = (value
>> 24) & 0xff;
1395 *scan
++ = (value
>> 16) & 0xff;
1396 *scan
++ = (value
>> 8) & 0xff;
1397 *scan
++ = (value
& 0xff);
1401 threadref_to_int (threadref
*ref
)
1404 unsigned char *scan
;
1406 scan
= (char *) ref
;
1410 value
= (value
<< 8) | ((*scan
++) & 0xff);
1415 copy_threadref (threadref
*dest
, threadref
*src
)
1418 unsigned char *csrc
, *cdest
;
1420 csrc
= (unsigned char *) src
;
1421 cdest
= (unsigned char *) dest
;
1428 threadmatch (threadref
*dest
, threadref
*src
)
1430 /* things are broken right now, so just assume we got a match */
1432 unsigned char *srcp
, *destp
;
1434 srcp
= (char *) src
;
1435 destp
= (char *) dest
;
1439 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
1446 threadid:1, # always request threadid
1453 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1456 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
1458 *pkt
++ = 'q'; /* Info Query */
1459 *pkt
++ = 'P'; /* process or thread info */
1460 pkt
= pack_int (pkt
, mode
); /* mode */
1461 pkt
= pack_threadid (pkt
, id
); /* threadid */
1462 *pkt
= '\0'; /* terminate */
1466 /* These values tag the fields in a thread info response packet */
1467 /* Tagging the fields allows us to request specific fields and to
1468 add more fields as time goes by */
1470 #define TAG_THREADID 1 /* Echo the thread identifier */
1471 #define TAG_EXISTS 2 /* Is this process defined enough to
1472 fetch registers and its stack */
1473 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1474 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is */
1475 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1479 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
1480 struct gdb_ext_thread_info
*info
)
1482 struct remote_state
*rs
= get_remote_state ();
1486 char *limit
= pkt
+ (rs
->remote_packet_size
); /* plausable parsing limit */
1489 /* info->threadid = 0; FIXME: implement zero_threadref */
1491 info
->display
[0] = '\0';
1492 info
->shortname
[0] = '\0';
1493 info
->more_display
[0] = '\0';
1495 /* Assume the characters indicating the packet type have been stripped */
1496 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
1497 pkt
= unpack_threadid (pkt
, &ref
);
1500 warning ("Incomplete response to threadinfo request\n");
1501 if (!threadmatch (&ref
, expectedref
))
1502 { /* This is an answer to a different request */
1503 warning ("ERROR RMT Thread info mismatch\n");
1506 copy_threadref (&info
->threadid
, &ref
);
1508 /* Loop on tagged fields , try to bail if somthing goes wrong */
1510 while ((pkt
< limit
) && mask
&& *pkt
) /* packets are terminated with nulls */
1512 pkt
= unpack_int (pkt
, &tag
); /* tag */
1513 pkt
= unpack_byte (pkt
, &length
); /* length */
1514 if (!(tag
& mask
)) /* tags out of synch with mask */
1516 warning ("ERROR RMT: threadinfo tag mismatch\n");
1520 if (tag
== TAG_THREADID
)
1524 warning ("ERROR RMT: length of threadid is not 16\n");
1528 pkt
= unpack_threadid (pkt
, &ref
);
1529 mask
= mask
& ~TAG_THREADID
;
1532 if (tag
== TAG_EXISTS
)
1534 info
->active
= stub_unpack_int (pkt
, length
);
1536 mask
= mask
& ~(TAG_EXISTS
);
1539 warning ("ERROR RMT: 'exists' length too long\n");
1545 if (tag
== TAG_THREADNAME
)
1547 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
1548 mask
= mask
& ~TAG_THREADNAME
;
1551 if (tag
== TAG_DISPLAY
)
1553 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
1554 mask
= mask
& ~TAG_DISPLAY
;
1557 if (tag
== TAG_MOREDISPLAY
)
1559 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
1560 mask
= mask
& ~TAG_MOREDISPLAY
;
1563 warning ("ERROR RMT: unknown thread info tag\n");
1564 break; /* Not a tag we know about */
1570 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
1571 struct gdb_ext_thread_info
*info
)
1573 struct remote_state
*rs
= get_remote_state ();
1575 char *threadinfo_pkt
= alloca (rs
->remote_packet_size
);
1577 pack_threadinfo_request (threadinfo_pkt
, fieldset
, threadid
);
1578 putpkt (threadinfo_pkt
);
1579 getpkt (threadinfo_pkt
, (rs
->remote_packet_size
), 0);
1580 result
= remote_unpack_thread_info_response (threadinfo_pkt
+ 2, threadid
,
1585 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1588 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
1589 threadref
*nextthread
)
1591 *pkt
++ = 'q'; /* info query packet */
1592 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
1593 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
1594 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
1595 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
1600 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1603 parse_threadlist_response (char *pkt
, int result_limit
,
1604 threadref
*original_echo
, threadref
*resultlist
,
1607 struct remote_state
*rs
= get_remote_state ();
1609 int count
, resultcount
, done
;
1612 /* Assume the 'q' and 'M chars have been stripped. */
1613 limit
= pkt
+ ((rs
->remote_packet_size
) - BUF_THREAD_ID_SIZE
); /* done parse past here */
1614 pkt
= unpack_byte (pkt
, &count
); /* count field */
1615 pkt
= unpack_nibble (pkt
, &done
);
1616 /* The first threadid is the argument threadid. */
1617 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
1618 while ((count
-- > 0) && (pkt
< limit
))
1620 pkt
= unpack_threadid (pkt
, resultlist
++);
1621 if (resultcount
++ >= result_limit
)
1630 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
1631 int *done
, int *result_count
, threadref
*threadlist
)
1633 struct remote_state
*rs
= get_remote_state ();
1634 static threadref echo_nextthread
;
1635 char *threadlist_packet
= alloca (rs
->remote_packet_size
);
1636 char *t_response
= alloca (rs
->remote_packet_size
);
1639 /* Trancate result limit to be smaller than the packet size */
1640 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10) >= (rs
->remote_packet_size
))
1641 result_limit
= ((rs
->remote_packet_size
) / BUF_THREAD_ID_SIZE
) - 2;
1643 pack_threadlist_request (threadlist_packet
,
1644 startflag
, result_limit
, nextthread
);
1645 putpkt (threadlist_packet
);
1646 getpkt (t_response
, (rs
->remote_packet_size
), 0);
1649 parse_threadlist_response (t_response
+ 2, result_limit
, &echo_nextthread
,
1652 if (!threadmatch (&echo_nextthread
, nextthread
))
1654 /* FIXME: This is a good reason to drop the packet */
1655 /* Possably, there is a duplicate response */
1657 retransmit immediatly - race conditions
1658 retransmit after timeout - yes
1660 wait for packet, then exit
1662 warning ("HMM: threadlist did not echo arg thread, dropping it\n");
1663 return 0; /* I choose simply exiting */
1665 if (*result_count
<= 0)
1669 warning ("RMT ERROR : failed to get remote thread list\n");
1672 return result
; /* break; */
1674 if (*result_count
> result_limit
)
1677 warning ("RMT ERROR: threadlist response longer than requested\n");
1683 /* This is the interface between remote and threads, remotes upper interface */
1685 /* remote_find_new_threads retrieves the thread list and for each
1686 thread in the list, looks up the thread in GDB's internal list,
1687 ading the thread if it does not already exist. This involves
1688 getting partial thread lists from the remote target so, polling the
1689 quit_flag is required. */
1692 /* About this many threadisds fit in a packet. */
1694 #define MAXTHREADLISTRESULTS 32
1697 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
1700 int done
, i
, result_count
;
1704 static threadref nextthread
;
1705 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
1710 if (loopcount
++ > looplimit
)
1713 warning ("Remote fetch threadlist -infinite loop-\n");
1716 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
1717 &done
, &result_count
, resultthreadlist
))
1722 /* clear for later iterations */
1724 /* Setup to resume next batch of thread references, set nextthread. */
1725 if (result_count
>= 1)
1726 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
1728 while (result_count
--)
1729 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
1736 remote_newthread_step (threadref
*ref
, void *context
)
1740 ptid
= pid_to_ptid (threadref_to_int (ref
));
1742 if (!in_thread_list (ptid
))
1744 return 1; /* continue iterator */
1747 #define CRAZY_MAX_THREADS 1000
1750 remote_current_thread (ptid_t oldpid
)
1752 struct remote_state
*rs
= get_remote_state ();
1753 char *buf
= alloca (rs
->remote_packet_size
);
1756 getpkt (buf
, (rs
->remote_packet_size
), 0);
1757 if (buf
[0] == 'Q' && buf
[1] == 'C')
1758 return pid_to_ptid (strtol (&buf
[2], NULL
, 16));
1763 /* Find new threads for info threads command.
1764 * Original version, using John Metzler's thread protocol.
1768 remote_find_new_threads (void)
1770 remote_threadlist_iterator (remote_newthread_step
, 0,
1772 if (PIDGET (inferior_ptid
) == MAGIC_NULL_PID
) /* ack ack ack */
1773 inferior_ptid
= remote_current_thread (inferior_ptid
);
1777 * Find all threads for info threads command.
1778 * Uses new thread protocol contributed by Cisco.
1779 * Falls back and attempts to use the older method (above)
1780 * if the target doesn't respond to the new method.
1784 remote_threads_info (void)
1786 struct remote_state
*rs
= get_remote_state ();
1787 char *buf
= alloca (rs
->remote_packet_size
);
1791 if (remote_desc
== 0) /* paranoia */
1792 error ("Command can only be used when connected to the remote target.");
1794 if (use_threadinfo_query
)
1796 putpkt ("qfThreadInfo");
1798 getpkt (bufp
, (rs
->remote_packet_size
), 0);
1799 if (bufp
[0] != '\0') /* q packet recognized */
1801 while (*bufp
++ == 'm') /* reply contains one or more TID */
1805 tid
= strtol (bufp
, &bufp
, 16);
1806 if (tid
!= 0 && !in_thread_list (pid_to_ptid (tid
)))
1807 add_thread (pid_to_ptid (tid
));
1809 while (*bufp
++ == ','); /* comma-separated list */
1810 putpkt ("qsThreadInfo");
1812 getpkt (bufp
, (rs
->remote_packet_size
), 0);
1818 /* Else fall back to old method based on jmetzler protocol. */
1819 use_threadinfo_query
= 0;
1820 remote_find_new_threads ();
1825 * Collect a descriptive string about the given thread.
1826 * The target may say anything it wants to about the thread
1827 * (typically info about its blocked / runnable state, name, etc.).
1828 * This string will appear in the info threads display.
1830 * Optional: targets are not required to implement this function.
1834 remote_threads_extra_info (struct thread_info
*tp
)
1836 struct remote_state
*rs
= get_remote_state ();
1840 struct gdb_ext_thread_info threadinfo
;
1841 static char display_buf
[100]; /* arbitrary... */
1842 char *bufp
= alloca (rs
->remote_packet_size
);
1843 int n
= 0; /* position in display_buf */
1845 if (remote_desc
== 0) /* paranoia */
1846 internal_error (__FILE__
, __LINE__
,
1847 "remote_threads_extra_info");
1849 if (use_threadextra_query
)
1851 sprintf (bufp
, "qThreadExtraInfo,%x", PIDGET (tp
->ptid
));
1853 getpkt (bufp
, (rs
->remote_packet_size
), 0);
1856 n
= min (strlen (bufp
) / 2, sizeof (display_buf
));
1857 result
= hex2bin (bufp
, display_buf
, n
);
1858 display_buf
[result
] = '\0';
1863 /* If the above query fails, fall back to the old method. */
1864 use_threadextra_query
= 0;
1865 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
1866 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
1867 int_to_threadref (&id
, PIDGET (tp
->ptid
));
1868 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
1869 if (threadinfo
.active
)
1871 if (*threadinfo
.shortname
)
1872 n
+= sprintf(&display_buf
[0], " Name: %s,", threadinfo
.shortname
);
1873 if (*threadinfo
.display
)
1874 n
+= sprintf(&display_buf
[n
], " State: %s,", threadinfo
.display
);
1875 if (*threadinfo
.more_display
)
1876 n
+= sprintf(&display_buf
[n
], " Priority: %s",
1877 threadinfo
.more_display
);
1881 /* for purely cosmetic reasons, clear up trailing commas */
1882 if (',' == display_buf
[n
-1])
1883 display_buf
[n
-1] = ' ';
1892 /* Restart the remote side; this is an extended protocol operation. */
1895 extended_remote_restart (void)
1897 struct remote_state
*rs
= get_remote_state ();
1898 char *buf
= alloca (rs
->remote_packet_size
);
1900 /* Send the restart command; for reasons I don't understand the
1901 remote side really expects a number after the "R". */
1903 sprintf (&buf
[1], "%x", 0);
1906 /* Now query for status so this looks just like we restarted
1907 gdbserver from scratch. */
1909 getpkt (buf
, (rs
->remote_packet_size
), 0);
1912 /* Clean up connection to a remote debugger. */
1915 remote_close (int quitting
)
1918 serial_close (remote_desc
);
1922 /* Query the remote side for the text, data and bss offsets. */
1927 struct remote_state
*rs
= get_remote_state ();
1928 char *buf
= alloca (rs
->remote_packet_size
);
1931 CORE_ADDR text_addr
, data_addr
, bss_addr
;
1932 struct section_offsets
*offs
;
1934 putpkt ("qOffsets");
1936 getpkt (buf
, (rs
->remote_packet_size
), 0);
1938 if (buf
[0] == '\000')
1939 return; /* Return silently. Stub doesn't support
1943 warning ("Remote failure reply: %s", buf
);
1947 /* Pick up each field in turn. This used to be done with scanf, but
1948 scanf will make trouble if CORE_ADDR size doesn't match
1949 conversion directives correctly. The following code will work
1950 with any size of CORE_ADDR. */
1951 text_addr
= data_addr
= bss_addr
= 0;
1955 if (strncmp (ptr
, "Text=", 5) == 0)
1958 /* Don't use strtol, could lose on big values. */
1959 while (*ptr
&& *ptr
!= ';')
1960 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
1965 if (!lose
&& strncmp (ptr
, ";Data=", 6) == 0)
1968 while (*ptr
&& *ptr
!= ';')
1969 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
1974 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
1977 while (*ptr
&& *ptr
!= ';')
1978 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
1984 error ("Malformed response to offset query, %s", buf
);
1986 if (symfile_objfile
== NULL
)
1989 offs
= ((struct section_offsets
*)
1990 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
1991 memcpy (offs
, symfile_objfile
->section_offsets
,
1992 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
1994 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
1996 /* This is a temporary kludge to force data and bss to use the same offsets
1997 because that's what nlmconv does now. The real solution requires changes
1998 to the stub and remote.c that I don't have time to do right now. */
2000 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
2001 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
2003 objfile_relocate (symfile_objfile
, offs
);
2006 /* Stub for catch_errors. */
2009 remote_start_remote_dummy (struct ui_out
*uiout
, void *dummy
)
2011 start_remote (); /* Initialize gdb process mechanisms */
2012 /* NOTE: Return something >=0. A -ve value is reserved for
2013 catch_exceptions. */
2018 remote_start_remote (struct ui_out
*uiout
, void *dummy
)
2020 immediate_quit
++; /* Allow user to interrupt it */
2022 /* Ack any packet which the remote side has already sent. */
2023 serial_write (remote_desc
, "+", 1);
2025 /* Let the stub know that we want it to return the thread. */
2028 inferior_ptid
= remote_current_thread (inferior_ptid
);
2030 get_offsets (); /* Get text, data & bss offsets */
2032 putpkt ("?"); /* initiate a query from remote machine */
2035 /* NOTE: See comment above in remote_start_remote_dummy(). This
2036 function returns something >=0. */
2037 return remote_start_remote_dummy (uiout
, dummy
);
2040 /* Open a connection to a remote debugger.
2041 NAME is the filename used for communication. */
2044 remote_open (char *name
, int from_tty
)
2046 remote_open_1 (name
, from_tty
, &remote_ops
, 0, 0);
2049 /* Just like remote_open, but with asynchronous support. */
2051 remote_async_open (char *name
, int from_tty
)
2053 remote_open_1 (name
, from_tty
, &remote_async_ops
, 0, 1);
2056 /* Open a connection to a remote debugger using the extended
2057 remote gdb protocol. NAME is the filename used for communication. */
2060 extended_remote_open (char *name
, int from_tty
)
2062 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */,
2066 /* Just like extended_remote_open, but with asynchronous support. */
2068 extended_remote_async_open (char *name
, int from_tty
)
2070 remote_open_1 (name
, from_tty
, &extended_async_remote_ops
,
2071 1 /*extended_p */, 1 /* async_p */);
2074 /* Generic code for opening a connection to a remote target. */
2077 init_all_packet_configs (void)
2080 update_packet_config (&remote_protocol_e
);
2081 update_packet_config (&remote_protocol_E
);
2082 update_packet_config (&remote_protocol_P
);
2083 update_packet_config (&remote_protocol_qSymbol
);
2084 update_packet_config (&remote_protocol_vcont
);
2085 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2086 update_packet_config (&remote_protocol_Z
[i
]);
2087 /* Force remote_write_bytes to check whether target supports binary
2089 update_packet_config (&remote_protocol_binary_download
);
2090 update_packet_config (&remote_protocol_qPart_auxv
);
2093 /* Symbol look-up. */
2096 remote_check_symbols (struct objfile
*objfile
)
2098 struct remote_state
*rs
= get_remote_state ();
2099 char *msg
, *reply
, *tmp
;
2100 struct minimal_symbol
*sym
;
2103 if (remote_protocol_qSymbol
.support
== PACKET_DISABLE
)
2106 msg
= alloca (rs
->remote_packet_size
);
2107 reply
= alloca (rs
->remote_packet_size
);
2109 /* Invite target to request symbol lookups. */
2111 putpkt ("qSymbol::");
2112 getpkt (reply
, (rs
->remote_packet_size
), 0);
2113 packet_ok (reply
, &remote_protocol_qSymbol
);
2115 while (strncmp (reply
, "qSymbol:", 8) == 0)
2118 end
= hex2bin (tmp
, msg
, strlen (tmp
) / 2);
2120 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
2122 sprintf (msg
, "qSymbol::%s", &reply
[8]);
2124 sprintf (msg
, "qSymbol:%s:%s",
2125 paddr_nz (SYMBOL_VALUE_ADDRESS (sym
)),
2128 getpkt (reply
, (rs
->remote_packet_size
), 0);
2132 static struct serial
*
2133 remote_serial_open (char *name
)
2135 static int udp_warning
= 0;
2137 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2138 of in ser-tcp.c, because it is the remote protocol assuming that the
2139 serial connection is reliable and not the serial connection promising
2141 if (!udp_warning
&& strncmp (name
, "udp:", 4) == 0)
2143 warning ("The remote protocol may be unreliable over UDP.");
2144 warning ("Some events may be lost, rendering further debugging "
2149 return serial_open (name
);
2153 remote_open_1 (char *name
, int from_tty
, struct target_ops
*target
,
2154 int extended_p
, int async_p
)
2157 struct remote_state
*rs
= get_remote_state ();
2159 error ("To open a remote debug connection, you need to specify what\n"
2160 "serial device is attached to the remote system\n"
2161 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
2163 /* See FIXME above */
2165 wait_forever_enabled_p
= 1;
2167 reopen_exec_file ();
2170 target_preopen (from_tty
);
2172 unpush_target (target
);
2174 remote_desc
= remote_serial_open (name
);
2176 perror_with_name (name
);
2178 if (baud_rate
!= -1)
2180 if (serial_setbaudrate (remote_desc
, baud_rate
))
2182 /* The requested speed could not be set. Error out to
2183 top level after closing remote_desc. Take care to
2184 set remote_desc to NULL to avoid closing remote_desc
2186 serial_close (remote_desc
);
2188 perror_with_name (name
);
2192 serial_raw (remote_desc
);
2194 /* If there is something sitting in the buffer we might take it as a
2195 response to a command, which would be bad. */
2196 serial_flush_input (remote_desc
);
2200 puts_filtered ("Remote debugging using ");
2201 puts_filtered (name
);
2202 puts_filtered ("\n");
2204 push_target (target
); /* Switch to using remote target now */
2206 init_all_packet_configs ();
2208 general_thread
= -2;
2209 continue_thread
= -2;
2211 /* Probe for ability to use "ThreadInfo" query, as required. */
2212 use_threadinfo_query
= 1;
2213 use_threadextra_query
= 1;
2215 /* Without this, some commands which require an active target (such
2216 as kill) won't work. This variable serves (at least) double duty
2217 as both the pid of the target process (if it has such), and as a
2218 flag indicating that a target is active. These functions should
2219 be split out into seperate variables, especially since GDB will
2220 someday have a notion of debugging several processes. */
2222 inferior_ptid
= pid_to_ptid (MAGIC_NULL_PID
);
2226 /* With this target we start out by owning the terminal. */
2227 remote_async_terminal_ours_p
= 1;
2229 /* FIXME: cagney/1999-09-23: During the initial connection it is
2230 assumed that the target is already ready and able to respond to
2231 requests. Unfortunately remote_start_remote() eventually calls
2232 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2233 around this. Eventually a mechanism that allows
2234 wait_for_inferior() to expect/get timeouts will be
2236 wait_forever_enabled_p
= 0;
2239 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2240 /* First delete any symbols previously loaded from shared libraries. */
2241 no_shared_libraries (NULL
, 0);
2244 /* Start the remote connection. If error() or QUIT, discard this
2245 target (we'd otherwise be in an inconsistent state) and then
2246 propogate the error on up the exception chain. This ensures that
2247 the caller doesn't stumble along blindly assuming that the
2248 function succeeded. The CLI doesn't have this problem but other
2249 UI's, such as MI do.
2251 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
2252 this function should return an error indication letting the
2253 caller restore the previous state. Unfortunately the command
2254 ``target remote'' is directly wired to this function making that
2255 impossible. On a positive note, the CLI side of this problem has
2256 been fixed - the function set_cmd_context() makes it possible for
2257 all the ``target ....'' commands to share a common callback
2258 function. See cli-dump.c. */
2259 ex
= catch_exceptions (uiout
,
2260 remote_start_remote
, NULL
,
2261 "Couldn't establish connection to remote"
2268 wait_forever_enabled_p
= 1;
2269 throw_exception (ex
);
2273 wait_forever_enabled_p
= 1;
2277 /* Tell the remote that we are using the extended protocol. */
2278 char *buf
= alloca (rs
->remote_packet_size
);
2280 getpkt (buf
, (rs
->remote_packet_size
), 0);
2282 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2283 /* FIXME: need a master target_open vector from which all
2284 remote_opens can be called, so that stuff like this can
2285 go there. Failing that, the following code must be copied
2286 to the open function for any remote target that wants to
2287 support svr4 shared libraries. */
2289 /* Set up to detect and load shared libraries. */
2290 if (exec_bfd
) /* No use without an exec file. */
2292 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid
));
2293 remote_check_symbols (symfile_objfile
);
2298 /* This takes a program previously attached to and detaches it. After
2299 this is done, GDB can be used to debug some other program. We
2300 better not have left any breakpoints in the target program or it'll
2301 die when it hits one. */
2304 remote_detach (char *args
, int from_tty
)
2306 struct remote_state
*rs
= get_remote_state ();
2307 char *buf
= alloca (rs
->remote_packet_size
);
2310 error ("Argument given to \"detach\" when remotely debugging.");
2312 /* Tell the remote target to detach. */
2314 remote_send (buf
, (rs
->remote_packet_size
));
2316 /* Unregister the file descriptor from the event loop. */
2317 if (target_is_async_p ())
2318 serial_async (remote_desc
, NULL
, 0);
2320 target_mourn_inferior ();
2322 puts_filtered ("Ending remote debugging.\n");
2325 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
2328 remote_disconnect (char *args
, int from_tty
)
2330 struct remote_state
*rs
= get_remote_state ();
2331 char *buf
= alloca (rs
->remote_packet_size
);
2334 error ("Argument given to \"detach\" when remotely debugging.");
2336 /* Unregister the file descriptor from the event loop. */
2337 if (target_is_async_p ())
2338 serial_async (remote_desc
, NULL
, 0);
2340 target_mourn_inferior ();
2342 puts_filtered ("Ending remote debugging.\n");
2345 /* Convert hex digit A to a number. */
2350 if (a
>= '0' && a
<= '9')
2352 else if (a
>= 'a' && a
<= 'f')
2353 return a
- 'a' + 10;
2354 else if (a
>= 'A' && a
<= 'F')
2355 return a
- 'A' + 10;
2357 error ("Reply contains invalid hex digit %d", a
);
2361 hex2bin (const char *hex
, char *bin
, int count
)
2365 for (i
= 0; i
< count
; i
++)
2367 if (hex
[0] == 0 || hex
[1] == 0)
2369 /* Hex string is short, or of uneven length.
2370 Return the count that has been converted so far. */
2373 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
2379 /* Convert number NIB to a hex digit. */
2387 return 'a' + nib
- 10;
2391 bin2hex (const char *bin
, char *hex
, int count
)
2394 /* May use a length, or a nul-terminated string as input. */
2396 count
= strlen (bin
);
2398 for (i
= 0; i
< count
; i
++)
2400 *hex
++ = tohex ((*bin
>> 4) & 0xf);
2401 *hex
++ = tohex (*bin
++ & 0xf);
2407 /* Check for the availability of vCont. This function should also check
2411 remote_vcont_probe (struct remote_state
*rs
, char *buf
)
2413 strcpy (buf
, "vCont?");
2415 getpkt (buf
, rs
->remote_packet_size
, 0);
2417 /* Make sure that the features we assume are supported. */
2418 if (strncmp (buf
, "vCont", 5) == 0)
2421 int support_s
, support_S
, support_c
, support_C
;
2427 while (p
&& *p
== ';')
2430 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2432 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2434 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2436 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2439 p
= strchr (p
, ';');
2442 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
2443 BUF will make packet_ok disable the packet. */
2444 if (!support_s
|| !support_S
|| !support_c
|| !support_C
)
2448 packet_ok (buf
, &remote_protocol_vcont
);
2451 /* Resume the remote inferior by using a "vCont" packet. The thread
2452 to be resumed is PTID; STEP and SIGGNAL indicate whether the
2453 resumed thread should be single-stepped and/or signalled. If PTID's
2454 PID is -1, then all threads are resumed; the thread to be stepped and/or
2455 signalled is given in the global INFERIOR_PTID. This function returns
2456 non-zero iff it resumes the inferior.
2458 This function issues a strict subset of all possible vCont commands at the
2462 remote_vcont_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2464 struct remote_state
*rs
= get_remote_state ();
2465 int pid
= PIDGET (ptid
);
2466 char *buf
= NULL
, *outbuf
;
2467 struct cleanup
*old_cleanup
;
2469 buf
= xmalloc (rs
->remote_packet_size
);
2470 old_cleanup
= make_cleanup (xfree
, buf
);
2472 if (remote_protocol_vcont
.support
== PACKET_SUPPORT_UNKNOWN
)
2473 remote_vcont_probe (rs
, buf
);
2475 if (remote_protocol_vcont
.support
== PACKET_DISABLE
)
2477 do_cleanups (old_cleanup
);
2481 /* If we could generate a wider range of packets, we'd have to worry
2482 about overflowing BUF. Should there be a generic
2483 "multi-part-packet" packet? */
2485 if (PIDGET (inferior_ptid
) == MAGIC_NULL_PID
)
2487 /* MAGIC_NULL_PTID means that we don't have any active threads, so we
2488 don't have any PID numbers the inferior will understand. Make sure
2489 to only send forms that do not specify a PID. */
2490 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2491 outbuf
= xstrprintf ("vCont;S%02x", siggnal
);
2493 outbuf
= xstrprintf ("vCont;s");
2494 else if (siggnal
!= TARGET_SIGNAL_0
)
2495 outbuf
= xstrprintf ("vCont;C%02x", siggnal
);
2497 outbuf
= xstrprintf ("vCont;c");
2501 /* Resume all threads, with preference for INFERIOR_PTID. */
2502 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2503 outbuf
= xstrprintf ("vCont;S%02x:%x;c", siggnal
,
2504 PIDGET (inferior_ptid
));
2506 outbuf
= xstrprintf ("vCont;s:%x;c", PIDGET (inferior_ptid
));
2507 else if (siggnal
!= TARGET_SIGNAL_0
)
2508 outbuf
= xstrprintf ("vCont;C%02x:%x;c", siggnal
,
2509 PIDGET (inferior_ptid
));
2511 outbuf
= xstrprintf ("vCont;c");
2515 /* Scheduler locking; resume only PTID. */
2516 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2517 outbuf
= xstrprintf ("vCont;S%02x:%x", siggnal
, pid
);
2519 outbuf
= xstrprintf ("vCont;s:%x", pid
);
2520 else if (siggnal
!= TARGET_SIGNAL_0
)
2521 outbuf
= xstrprintf ("vCont;C%02x:%x", siggnal
, pid
);
2523 outbuf
= xstrprintf ("vCont;c:%x", pid
);
2526 gdb_assert (outbuf
&& strlen (outbuf
) < rs
->remote_packet_size
);
2527 make_cleanup (xfree
, outbuf
);
2531 do_cleanups (old_cleanup
);
2536 /* Tell the remote machine to resume. */
2538 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
2540 static int last_sent_step
;
2543 remote_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2545 struct remote_state
*rs
= get_remote_state ();
2546 char *buf
= alloca (rs
->remote_packet_size
);
2547 int pid
= PIDGET (ptid
);
2550 last_sent_signal
= siggnal
;
2551 last_sent_step
= step
;
2553 /* A hook for when we need to do something at the last moment before
2555 if (deprecated_target_resume_hook
)
2556 (*deprecated_target_resume_hook
) ();
2558 /* The vCont packet doesn't need to specify threads via Hc. */
2559 if (remote_vcont_resume (ptid
, step
, siggnal
))
2562 /* All other supported resume packets do use Hc, so call set_thread. */
2564 set_thread (0, 0); /* run any thread */
2566 set_thread (pid
, 0); /* run this thread */
2568 /* The s/S/c/C packets do not return status. So if the target does
2569 not support the S or C packets, the debug agent returns an empty
2570 string which is detected in remote_wait(). This protocol defect
2571 is fixed in the e/E packets. */
2573 if (step
&& step_range_end
)
2575 /* If the target does not support the 'E' packet, we try the 'S'
2576 packet. Ideally we would fall back to the 'e' packet if that
2577 too is not supported. But that would require another copy of
2578 the code to issue the 'e' packet (and fall back to 's' if not
2579 supported) in remote_wait(). */
2581 if (siggnal
!= TARGET_SIGNAL_0
)
2583 if (remote_protocol_E
.support
!= PACKET_DISABLE
)
2587 *p
++ = tohex (((int) siggnal
>> 4) & 0xf);
2588 *p
++ = tohex (((int) siggnal
) & 0xf);
2590 p
+= hexnumstr (p
, (ULONGEST
) step_range_start
);
2592 p
+= hexnumstr (p
, (ULONGEST
) step_range_end
);
2596 getpkt (buf
, (rs
->remote_packet_size
), 0);
2598 if (packet_ok (buf
, &remote_protocol_E
) == PACKET_OK
)
2604 if (remote_protocol_e
.support
!= PACKET_DISABLE
)
2608 p
+= hexnumstr (p
, (ULONGEST
) step_range_start
);
2610 p
+= hexnumstr (p
, (ULONGEST
) step_range_end
);
2614 getpkt (buf
, (rs
->remote_packet_size
), 0);
2616 if (packet_ok (buf
, &remote_protocol_e
) == PACKET_OK
)
2622 if (siggnal
!= TARGET_SIGNAL_0
)
2624 buf
[0] = step
? 'S' : 'C';
2625 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
2626 buf
[2] = tohex (((int) siggnal
) & 0xf);
2630 strcpy (buf
, step
? "s" : "c");
2635 /* Same as remote_resume, but with async support. */
2637 remote_async_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2639 remote_resume (ptid
, step
, siggnal
);
2641 /* We are about to start executing the inferior, let's register it
2642 with the event loop. NOTE: this is the one place where all the
2643 execution commands end up. We could alternatively do this in each
2644 of the execution commands in infcmd.c.*/
2645 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
2646 into infcmd.c in order to allow inferior function calls to work
2647 NOT asynchronously. */
2648 if (event_loop_p
&& target_can_async_p ())
2649 target_async (inferior_event_handler
, 0);
2650 /* Tell the world that the target is now executing. */
2651 /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set
2652 this? Instead, should the client of target just assume (for
2653 async targets) that the target is going to start executing? Is
2654 this information already found in the continuation block? */
2655 if (target_is_async_p ())
2656 target_executing
= 1;
2660 /* Set up the signal handler for SIGINT, while the target is
2661 executing, ovewriting the 'regular' SIGINT signal handler. */
2663 initialize_sigint_signal_handler (void)
2665 sigint_remote_token
=
2666 create_async_signal_handler (async_remote_interrupt
, NULL
);
2667 signal (SIGINT
, handle_remote_sigint
);
2670 /* Signal handler for SIGINT, while the target is executing. */
2672 handle_remote_sigint (int sig
)
2674 signal (sig
, handle_remote_sigint_twice
);
2675 sigint_remote_twice_token
=
2676 create_async_signal_handler (async_remote_interrupt_twice
, NULL
);
2677 mark_async_signal_handler_wrapper (sigint_remote_token
);
2680 /* Signal handler for SIGINT, installed after SIGINT has already been
2681 sent once. It will take effect the second time that the user sends
2684 handle_remote_sigint_twice (int sig
)
2686 signal (sig
, handle_sigint
);
2687 sigint_remote_twice_token
=
2688 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
2689 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
2692 /* Perform the real interruption of the target execution, in response
2695 async_remote_interrupt (gdb_client_data arg
)
2698 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2703 /* Perform interrupt, if the first attempt did not succeed. Just give
2704 up on the target alltogether. */
2706 async_remote_interrupt_twice (gdb_client_data arg
)
2709 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
2710 /* Do something only if the target was not killed by the previous
2712 if (target_executing
)
2715 signal (SIGINT
, handle_remote_sigint
);
2719 /* Reinstall the usual SIGINT handlers, after the target has
2722 cleanup_sigint_signal_handler (void *dummy
)
2724 signal (SIGINT
, handle_sigint
);
2725 if (sigint_remote_twice_token
)
2726 delete_async_signal_handler ((struct async_signal_handler
**) & sigint_remote_twice_token
);
2727 if (sigint_remote_token
)
2728 delete_async_signal_handler ((struct async_signal_handler
**) & sigint_remote_token
);
2731 /* Send ^C to target to halt it. Target will respond, and send us a
2733 static void (*ofunc
) (int);
2735 /* The command line interface's stop routine. This function is installed
2736 as a signal handler for SIGINT. The first time a user requests a
2737 stop, we call remote_stop to send a break or ^C. If there is no
2738 response from the target (it didn't stop when the user requested it),
2739 we ask the user if he'd like to detach from the target. */
2741 remote_interrupt (int signo
)
2743 /* If this doesn't work, try more severe steps. */
2744 signal (signo
, remote_interrupt_twice
);
2747 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2752 /* The user typed ^C twice. */
2755 remote_interrupt_twice (int signo
)
2757 signal (signo
, ofunc
);
2759 signal (signo
, remote_interrupt
);
2762 /* This is the generic stop called via the target vector. When a target
2763 interrupt is requested, either by the command line or the GUI, we
2764 will eventually end up here. */
2768 /* Send a break or a ^C, depending on user preference. */
2770 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
2773 serial_send_break (remote_desc
);
2775 serial_write (remote_desc
, "\003", 1);
2778 /* Ask the user what to do when an interrupt is received. */
2781 interrupt_query (void)
2783 target_terminal_ours ();
2785 if (query ("Interrupted while waiting for the program.\n\
2786 Give up (and stop debugging it)? "))
2788 target_mourn_inferior ();
2789 throw_exception (RETURN_QUIT
);
2792 target_terminal_inferior ();
2795 /* Enable/disable target terminal ownership. Most targets can use
2796 terminal groups to control terminal ownership. Remote targets are
2797 different in that explicit transfer of ownership to/from GDB/target
2801 remote_async_terminal_inferior (void)
2803 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
2804 sync_execution here. This function should only be called when
2805 GDB is resuming the inferior in the forground. A background
2806 resume (``run&'') should leave GDB in control of the terminal and
2807 consequently should not call this code. */
2808 if (!sync_execution
)
2810 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
2811 calls target_terminal_*() idenpotent. The event-loop GDB talking
2812 to an asynchronous target with a synchronous command calls this
2813 function from both event-top.c and infrun.c/infcmd.c. Once GDB
2814 stops trying to transfer the terminal to the target when it
2815 shouldn't this guard can go away. */
2816 if (!remote_async_terminal_ours_p
)
2818 delete_file_handler (input_fd
);
2819 remote_async_terminal_ours_p
= 0;
2820 initialize_sigint_signal_handler ();
2821 /* NOTE: At this point we could also register our selves as the
2822 recipient of all input. Any characters typed could then be
2823 passed on down to the target. */
2827 remote_async_terminal_ours (void)
2829 /* See FIXME in remote_async_terminal_inferior. */
2830 if (!sync_execution
)
2832 /* See FIXME in remote_async_terminal_inferior. */
2833 if (remote_async_terminal_ours_p
)
2835 cleanup_sigint_signal_handler (NULL
);
2836 add_file_handler (input_fd
, stdin_event_handler
, 0);
2837 remote_async_terminal_ours_p
= 1;
2840 /* If nonzero, ignore the next kill. */
2845 remote_console_output (char *msg
)
2849 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
2852 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
2855 fputs_unfiltered (tb
, gdb_stdtarg
);
2857 gdb_flush (gdb_stdtarg
);
2860 /* Wait until the remote machine stops, then return,
2861 storing status in STATUS just as `wait' would.
2862 Returns "pid", which in the case of a multi-threaded
2863 remote OS, is the thread-id. */
2866 remote_wait (ptid_t ptid
, struct target_waitstatus
*status
)
2868 struct remote_state
*rs
= get_remote_state ();
2869 unsigned char *buf
= alloca (rs
->remote_packet_size
);
2870 ULONGEST thread_num
= -1;
2873 status
->kind
= TARGET_WAITKIND_EXITED
;
2874 status
->value
.integer
= 0;
2880 ofunc
= signal (SIGINT
, remote_interrupt
);
2881 getpkt (buf
, (rs
->remote_packet_size
), 1);
2882 signal (SIGINT
, ofunc
);
2884 /* This is a hook for when we need to do something (perhaps the
2885 collection of trace data) every time the target stops. */
2886 if (deprecated_target_wait_loop_hook
)
2887 (*deprecated_target_wait_loop_hook
) ();
2889 remote_stopped_by_watchpoint_p
= 0;
2893 case 'E': /* Error of some sort */
2894 warning ("Remote failure reply: %s", buf
);
2896 case 'F': /* File-I/O request */
2897 remote_fileio_request (buf
);
2899 case 'T': /* Status with PC, SP, FP, ... */
2902 char regs
[MAX_REGISTER_SIZE
];
2904 /* Expedited reply, containing Signal, {regno, reg} repeat */
2905 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
2907 n... = register number
2908 r... = register contents
2910 p
= &buf
[3]; /* after Txx */
2919 /* If the packet contains a register number save it in pnum
2920 and set p1 to point to the character following it.
2921 Otherwise p1 points to p. */
2923 /* If this packet is an awatch packet, don't parse the 'a'
2924 as a register number. */
2926 if (strncmp (p
, "awatch", strlen("awatch")) != 0)
2928 /* Read the ``P'' register number. */
2929 pnum
= strtol (p
, &p_temp
, 16);
2930 p1
= (unsigned char *) p_temp
;
2935 if (p1
== p
) /* No register number present here */
2937 p1
= (unsigned char *) strchr (p
, ':');
2939 warning ("Malformed packet(a) (missing colon): %s\n\
2942 if (strncmp (p
, "thread", p1
- p
) == 0)
2944 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
2945 record_currthread (thread_num
);
2946 p
= (unsigned char *) p_temp
;
2948 else if ((strncmp (p
, "watch", p1
- p
) == 0)
2949 || (strncmp (p
, "rwatch", p1
- p
) == 0)
2950 || (strncmp (p
, "awatch", p1
- p
) == 0))
2952 remote_stopped_by_watchpoint_p
= 1;
2953 p
= unpack_varlen_hex (++p1
, &addr
);
2954 remote_watch_data_address
= (CORE_ADDR
)addr
;
2958 /* Silently skip unknown optional info. */
2959 p_temp
= strchr (p1
+ 1, ';');
2961 p
= (unsigned char *) p_temp
;
2966 struct packet_reg
*reg
= packet_reg_from_pnum (rs
, pnum
);
2970 error ("Malformed packet(b) (missing colon): %s\nPacket: '%s'\n",
2974 error ("Remote sent bad register number %s: %s\nPacket: '%s'\n",
2975 phex_nz (pnum
, 0), p
, buf
);
2977 fieldsize
= hex2bin (p
, regs
, DEPRECATED_REGISTER_RAW_SIZE (reg
->regnum
));
2979 if (fieldsize
< DEPRECATED_REGISTER_RAW_SIZE (reg
->regnum
))
2980 warning ("Remote reply is too short: %s", buf
);
2981 supply_register (reg
->regnum
, regs
);
2985 error ("Remote register badly formatted: %s\nhere: %s", buf
, p
);
2989 case 'S': /* Old style status, just signal only */
2990 status
->kind
= TARGET_WAITKIND_STOPPED
;
2991 status
->value
.sig
= (enum target_signal
)
2992 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2996 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
2997 record_currthread (thread_num
);
3000 case 'W': /* Target exited */
3002 /* The remote process exited. */
3003 status
->kind
= TARGET_WAITKIND_EXITED
;
3004 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
3008 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
3009 status
->value
.sig
= (enum target_signal
)
3010 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3014 case 'O': /* Console output */
3015 remote_console_output (buf
+ 1);
3018 if (last_sent_signal
!= TARGET_SIGNAL_0
)
3020 /* Zero length reply means that we tried 'S' or 'C' and
3021 the remote system doesn't support it. */
3022 target_terminal_ours_for_output ();
3024 ("Can't send signals to this remote system. %s not sent.\n",
3025 target_signal_to_name (last_sent_signal
));
3026 last_sent_signal
= TARGET_SIGNAL_0
;
3027 target_terminal_inferior ();
3029 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
3030 putpkt ((char *) buf
);
3033 /* else fallthrough */
3035 warning ("Invalid remote reply: %s", buf
);
3040 if (thread_num
!= -1)
3042 return pid_to_ptid (thread_num
);
3044 return inferior_ptid
;
3047 /* Async version of remote_wait. */
3049 remote_async_wait (ptid_t ptid
, struct target_waitstatus
*status
)
3051 struct remote_state
*rs
= get_remote_state ();
3052 unsigned char *buf
= alloca (rs
->remote_packet_size
);
3053 ULONGEST thread_num
= -1;
3056 status
->kind
= TARGET_WAITKIND_EXITED
;
3057 status
->value
.integer
= 0;
3059 remote_stopped_by_watchpoint_p
= 0;
3065 if (!target_is_async_p ())
3066 ofunc
= signal (SIGINT
, remote_interrupt
);
3067 /* FIXME: cagney/1999-09-27: If we're in async mode we should
3068 _never_ wait for ever -> test on target_is_async_p().
3069 However, before we do that we need to ensure that the caller
3070 knows how to take the target into/out of async mode. */
3071 getpkt (buf
, (rs
->remote_packet_size
), wait_forever_enabled_p
);
3072 if (!target_is_async_p ())
3073 signal (SIGINT
, ofunc
);
3075 /* This is a hook for when we need to do something (perhaps the
3076 collection of trace data) every time the target stops. */
3077 if (deprecated_target_wait_loop_hook
)
3078 (*deprecated_target_wait_loop_hook
) ();
3082 case 'E': /* Error of some sort */
3083 warning ("Remote failure reply: %s", buf
);
3085 case 'F': /* File-I/O request */
3086 remote_fileio_request (buf
);
3088 case 'T': /* Status with PC, SP, FP, ... */
3091 char regs
[MAX_REGISTER_SIZE
];
3093 /* Expedited reply, containing Signal, {regno, reg} repeat */
3094 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3096 n... = register number
3097 r... = register contents
3099 p
= &buf
[3]; /* after Txx */
3108 /* If the packet contains a register number, save it in pnum
3109 and set p1 to point to the character following it.
3110 Otherwise p1 points to p. */
3112 /* If this packet is an awatch packet, don't parse the 'a'
3113 as a register number. */
3115 if (!strncmp (p
, "awatch", strlen ("awatch")) != 0)
3117 /* Read the register number. */
3118 pnum
= strtol (p
, &p_temp
, 16);
3119 p1
= (unsigned char *) p_temp
;
3124 if (p1
== p
) /* No register number present here */
3126 p1
= (unsigned char *) strchr (p
, ':');
3128 error ("Malformed packet(a) (missing colon): %s\nPacket: '%s'\n",
3130 if (strncmp (p
, "thread", p1
- p
) == 0)
3132 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
3133 record_currthread (thread_num
);
3134 p
= (unsigned char *) p_temp
;
3136 else if ((strncmp (p
, "watch", p1
- p
) == 0)
3137 || (strncmp (p
, "rwatch", p1
- p
) == 0)
3138 || (strncmp (p
, "awatch", p1
- p
) == 0))
3140 remote_stopped_by_watchpoint_p
= 1;
3141 p
= unpack_varlen_hex (++p1
, &addr
);
3142 remote_watch_data_address
= (CORE_ADDR
)addr
;
3146 /* Silently skip unknown optional info. */
3147 p_temp
= (unsigned char *) strchr (p1
+ 1, ';');
3155 struct packet_reg
*reg
= packet_reg_from_pnum (rs
, pnum
);
3158 error ("Malformed packet(b) (missing colon): %s\nPacket: '%s'\n",
3162 error ("Remote sent bad register number %ld: %s\nPacket: '%s'\n",
3165 fieldsize
= hex2bin (p
, regs
, DEPRECATED_REGISTER_RAW_SIZE (reg
->regnum
));
3167 if (fieldsize
< DEPRECATED_REGISTER_RAW_SIZE (reg
->regnum
))
3168 warning ("Remote reply is too short: %s", buf
);
3169 supply_register (reg
->regnum
, regs
);
3173 error ("Remote register badly formatted: %s\nhere: %s",
3178 case 'S': /* Old style status, just signal only */
3179 status
->kind
= TARGET_WAITKIND_STOPPED
;
3180 status
->value
.sig
= (enum target_signal
)
3181 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3185 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
3186 record_currthread (thread_num
);
3189 case 'W': /* Target exited */
3191 /* The remote process exited. */
3192 status
->kind
= TARGET_WAITKIND_EXITED
;
3193 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
3197 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
3198 status
->value
.sig
= (enum target_signal
)
3199 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3203 case 'O': /* Console output */
3204 remote_console_output (buf
+ 1);
3205 /* Return immediately to the event loop. The event loop will
3206 still be waiting on the inferior afterwards. */
3207 status
->kind
= TARGET_WAITKIND_IGNORE
;
3210 if (last_sent_signal
!= TARGET_SIGNAL_0
)
3212 /* Zero length reply means that we tried 'S' or 'C' and
3213 the remote system doesn't support it. */
3214 target_terminal_ours_for_output ();
3216 ("Can't send signals to this remote system. %s not sent.\n",
3217 target_signal_to_name (last_sent_signal
));
3218 last_sent_signal
= TARGET_SIGNAL_0
;
3219 target_terminal_inferior ();
3221 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
3222 putpkt ((char *) buf
);
3225 /* else fallthrough */
3227 warning ("Invalid remote reply: %s", buf
);
3232 if (thread_num
!= -1)
3234 return pid_to_ptid (thread_num
);
3236 return inferior_ptid
;
3239 /* Number of bytes of registers this stub implements. */
3241 static int register_bytes_found
;
3243 /* Read the remote registers into the block REGS. */
3244 /* Currently we just read all the registers, so we don't use regnum. */
3247 remote_fetch_registers (int regnum
)
3249 struct remote_state
*rs
= get_remote_state ();
3250 char *buf
= alloca (rs
->remote_packet_size
);
3253 char *regs
= alloca (rs
->sizeof_g_packet
);
3255 set_thread (PIDGET (inferior_ptid
), 1);
3259 struct packet_reg
*reg
= packet_reg_from_regnum (rs
, regnum
);
3260 gdb_assert (reg
!= NULL
);
3261 if (!reg
->in_g_packet
)
3262 internal_error (__FILE__
, __LINE__
,
3263 "Attempt to fetch a non G-packet register when this "
3264 "remote.c does not support the p-packet.");
3268 remote_send (buf
, (rs
->remote_packet_size
));
3270 /* Save the size of the packet sent to us by the target. Its used
3271 as a heuristic when determining the max size of packets that the
3272 target can safely receive. */
3273 if ((rs
->actual_register_packet_size
) == 0)
3274 (rs
->actual_register_packet_size
) = strlen (buf
);
3276 /* Unimplemented registers read as all bits zero. */
3277 memset (regs
, 0, rs
->sizeof_g_packet
);
3279 /* We can get out of synch in various cases. If the first character
3280 in the buffer is not a hex character, assume that has happened
3281 and try to fetch another packet to read. */
3282 while ((buf
[0] < '0' || buf
[0] > '9')
3283 && (buf
[0] < 'a' || buf
[0] > 'f')
3284 && buf
[0] != 'x') /* New: unavailable register value */
3287 fprintf_unfiltered (gdb_stdlog
,
3288 "Bad register packet; fetching a new packet\n");
3289 getpkt (buf
, (rs
->remote_packet_size
), 0);
3292 /* Reply describes registers byte by byte, each byte encoded as two
3293 hex characters. Suck them all up, then supply them to the
3294 register cacheing/storage mechanism. */
3297 for (i
= 0; i
< rs
->sizeof_g_packet
; i
++)
3303 warning ("Remote reply is of odd length: %s", buf
);
3304 /* Don't change register_bytes_found in this case, and don't
3305 print a second warning. */
3308 if (p
[0] == 'x' && p
[1] == 'x')
3309 regs
[i
] = 0; /* 'x' */
3311 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3315 if (i
!= register_bytes_found
)
3317 register_bytes_found
= i
;
3318 if (REGISTER_BYTES_OK_P ()
3319 && !REGISTER_BYTES_OK (i
))
3320 warning ("Remote reply is too short: %s", buf
);
3326 for (i
= 0; i
< NUM_REGS
+ NUM_PSEUDO_REGS
; i
++)
3328 struct packet_reg
*r
= &rs
->regs
[i
];
3331 if (r
->offset
* 2 >= strlen (buf
))
3332 /* A short packet that didn't include the register's
3333 value, this implies that the register is zero (and
3334 not that the register is unavailable). Supply that
3336 regcache_raw_supply (current_regcache
, r
->regnum
, NULL
);
3337 else if (buf
[r
->offset
* 2] == 'x')
3339 gdb_assert (r
->offset
* 2 < strlen (buf
));
3340 /* The register isn't available, mark it as such (at
3341 the same time setting the value to zero). */
3342 regcache_raw_supply (current_regcache
, r
->regnum
, NULL
);
3343 set_register_cached (i
, -1);
3346 regcache_raw_supply (current_regcache
, r
->regnum
,
3353 /* Prepare to store registers. Since we may send them all (using a
3354 'G' request), we have to read out the ones we don't want to change
3358 remote_prepare_to_store (void)
3360 struct remote_state
*rs
= get_remote_state ();
3362 char buf
[MAX_REGISTER_SIZE
];
3364 /* Make sure the entire registers array is valid. */
3365 switch (remote_protocol_P
.support
)
3367 case PACKET_DISABLE
:
3368 case PACKET_SUPPORT_UNKNOWN
:
3369 /* Make sure all the necessary registers are cached. */
3370 for (i
= 0; i
< NUM_REGS
; i
++)
3371 if (rs
->regs
[i
].in_g_packet
)
3372 regcache_raw_read (current_regcache
, rs
->regs
[i
].regnum
, buf
);
3379 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
3380 packet was not recognized. */
3383 store_register_using_P (int regnum
)
3385 struct remote_state
*rs
= get_remote_state ();
3386 struct packet_reg
*reg
= packet_reg_from_regnum (rs
, regnum
);
3387 /* Try storing a single register. */
3388 char *buf
= alloca (rs
->remote_packet_size
);
3389 char regp
[MAX_REGISTER_SIZE
];
3393 sprintf (buf
, "P%s=", phex_nz (reg
->pnum
, 0));
3394 p
= buf
+ strlen (buf
);
3395 regcache_collect (reg
->regnum
, regp
);
3396 bin2hex (regp
, p
, DEPRECATED_REGISTER_RAW_SIZE (reg
->regnum
));
3397 remote_send (buf
, rs
->remote_packet_size
);
3399 return buf
[0] != '\0';
3403 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
3404 of the register cache buffer. FIXME: ignores errors. */
3407 remote_store_registers (int regnum
)
3409 struct remote_state
*rs
= get_remote_state ();
3415 set_thread (PIDGET (inferior_ptid
), 1);
3419 switch (remote_protocol_P
.support
)
3421 case PACKET_DISABLE
:
3424 if (store_register_using_P (regnum
))
3427 error ("Protocol error: P packet not recognized by stub");
3428 case PACKET_SUPPORT_UNKNOWN
:
3429 if (store_register_using_P (regnum
))
3431 /* The stub recognized the 'P' packet. Remember this. */
3432 remote_protocol_P
.support
= PACKET_ENABLE
;
3437 /* The stub does not support the 'P' packet. Use 'G'
3438 instead, and don't try using 'P' in the future (it
3439 will just waste our time). */
3440 remote_protocol_P
.support
= PACKET_DISABLE
;
3446 /* Extract all the registers in the regcache copying them into a
3450 regs
= alloca (rs
->sizeof_g_packet
);
3451 memset (regs
, rs
->sizeof_g_packet
, 0);
3452 for (i
= 0; i
< NUM_REGS
+ NUM_PSEUDO_REGS
; i
++)
3454 struct packet_reg
*r
= &rs
->regs
[i
];
3456 regcache_collect (r
->regnum
, regs
+ r
->offset
);
3460 /* Command describes registers byte by byte,
3461 each byte encoded as two hex characters. */
3462 buf
= alloca (rs
->remote_packet_size
);
3465 /* remote_prepare_to_store insures that register_bytes_found gets set. */
3466 bin2hex (regs
, p
, register_bytes_found
);
3467 remote_send (buf
, (rs
->remote_packet_size
));
3471 /* Return the number of hex digits in num. */
3474 hexnumlen (ULONGEST num
)
3478 for (i
= 0; num
!= 0; i
++)
3484 /* Set BUF to the minimum number of hex digits representing NUM. */
3487 hexnumstr (char *buf
, ULONGEST num
)
3489 int len
= hexnumlen (num
);
3490 return hexnumnstr (buf
, num
, len
);
3494 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
3497 hexnumnstr (char *buf
, ULONGEST num
, int width
)
3503 for (i
= width
- 1; i
>= 0; i
--)
3505 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
3512 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
3515 remote_address_masked (CORE_ADDR addr
)
3517 if (remote_address_size
> 0
3518 && remote_address_size
< (sizeof (ULONGEST
) * 8))
3520 /* Only create a mask when that mask can safely be constructed
3521 in a ULONGEST variable. */
3523 mask
= (mask
<< remote_address_size
) - 1;
3529 /* Determine whether the remote target supports binary downloading.
3530 This is accomplished by sending a no-op memory write of zero length
3531 to the target at the specified address. It does not suffice to send
3532 the whole packet, since many stubs strip the eighth bit and subsequently
3533 compute a wrong checksum, which causes real havoc with remote_write_bytes.
3535 NOTE: This can still lose if the serial line is not eight-bit
3536 clean. In cases like this, the user should clear "remote
3540 check_binary_download (CORE_ADDR addr
)
3542 struct remote_state
*rs
= get_remote_state ();
3543 switch (remote_protocol_binary_download
.support
)
3545 case PACKET_DISABLE
:
3549 case PACKET_SUPPORT_UNKNOWN
:
3551 char *buf
= alloca (rs
->remote_packet_size
);
3556 p
+= hexnumstr (p
, (ULONGEST
) addr
);
3558 p
+= hexnumstr (p
, (ULONGEST
) 0);
3562 putpkt_binary (buf
, (int) (p
- buf
));
3563 getpkt (buf
, (rs
->remote_packet_size
), 0);
3568 fprintf_unfiltered (gdb_stdlog
,
3569 "binary downloading NOT suppported by target\n");
3570 remote_protocol_binary_download
.support
= PACKET_DISABLE
;
3575 fprintf_unfiltered (gdb_stdlog
,
3576 "binary downloading suppported by target\n");
3577 remote_protocol_binary_download
.support
= PACKET_ENABLE
;
3584 /* Write memory data directly to the remote machine.
3585 This does not inform the data cache; the data cache uses this.
3586 MEMADDR is the address in the remote memory space.
3587 MYADDR is the address of the buffer in our space.
3588 LEN is the number of bytes.
3590 Returns number of bytes transferred, or 0 (setting errno) for
3591 error. Only transfer a single packet. */
3594 remote_write_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
)
3598 unsigned char *plen
;
3604 unsigned char *payload_start
;
3606 /* Verify that the target can support a binary download. */
3607 check_binary_download (memaddr
);
3609 /* Compute the size, and then allocate space for the largest
3610 possible packet. Include space for an extra trailing NUL. */
3611 sizeof_buf
= get_memory_write_packet_size () + 1;
3612 buf
= alloca (sizeof_buf
);
3614 /* Compute the size of the actual payload by subtracting out the
3615 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
3616 payload_size
= (get_memory_write_packet_size () - (strlen ("$M,:#NN")
3617 + hexnumlen (memaddr
)
3618 + hexnumlen (len
)));
3620 /* Construct the packet header: "[MX]<memaddr>,<len>:". */
3622 /* Append "[XM]". Compute a best guess of the number of bytes
3623 actually transfered. */
3625 switch (remote_protocol_binary_download
.support
)
3629 /* Best guess at number of bytes that will fit. */
3630 todo
= min (len
, payload_size
);
3632 case PACKET_DISABLE
:
3634 /* num bytes that will fit */
3635 todo
= min (len
, payload_size
/ 2);
3637 case PACKET_SUPPORT_UNKNOWN
:
3638 internal_error (__FILE__
, __LINE__
,
3639 "remote_write_bytes: bad internal state");
3641 internal_error (__FILE__
, __LINE__
, "bad switch");
3644 /* Append "<memaddr>". */
3645 memaddr
= remote_address_masked (memaddr
);
3646 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
3651 /* Append <len>. Retain the location/size of <len>. It may need to
3652 be adjusted once the packet body has been created. */
3654 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
3661 /* Append the packet body. */
3663 switch (remote_protocol_binary_download
.support
)
3666 /* Binary mode. Send target system values byte by byte, in
3667 increasing byte addresses. Only escape certain critical
3670 (nr_bytes
< todo
) && (p
- payload_start
) < payload_size
;
3673 switch (myaddr
[nr_bytes
] & 0xff)
3678 /* These must be escaped */
3680 *p
++ = (myaddr
[nr_bytes
] & 0xff) ^ 0x20;
3683 *p
++ = myaddr
[nr_bytes
] & 0xff;
3687 if (nr_bytes
< todo
)
3689 /* Escape chars have filled up the buffer prematurely,
3690 and we have actually sent fewer bytes than planned.
3691 Fix-up the length field of the packet. Use the same
3692 number of characters as before. */
3693 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
3694 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
3697 case PACKET_DISABLE
:
3698 /* Normal mode: Send target system values byte by byte, in
3699 increasing byte addresses. Each byte is encoded as a two hex
3701 nr_bytes
= bin2hex (myaddr
, p
, todo
);
3704 case PACKET_SUPPORT_UNKNOWN
:
3705 internal_error (__FILE__
, __LINE__
,
3706 "remote_write_bytes: bad internal state");
3708 internal_error (__FILE__
, __LINE__
, "bad switch");
3711 putpkt_binary (buf
, (int) (p
- buf
));
3712 getpkt (buf
, sizeof_buf
, 0);
3716 /* There is no correspondance between what the remote protocol
3717 uses for errors and errno codes. We would like a cleaner way
3718 of representing errors (big enough to include errno codes,
3719 bfd_error codes, and others). But for now just return EIO. */
3724 /* Return NR_BYTES, not TODO, in case escape chars caused us to send fewer
3725 bytes than we'd planned. */
3729 /* Read memory data directly from the remote machine.
3730 This does not use the data cache; the data cache uses this.
3731 MEMADDR is the address in the remote memory space.
3732 MYADDR is the address of the buffer in our space.
3733 LEN is the number of bytes.
3735 Returns number of bytes transferred, or 0 for error. */
3737 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
3738 remote targets) shouldn't attempt to read the entire buffer.
3739 Instead it should read a single packet worth of data and then
3740 return the byte size of that packet to the caller. The caller (its
3741 caller and its callers caller ;-) already contains code for
3742 handling partial reads. */
3745 remote_read_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
)
3748 int max_buf_size
; /* Max size of packet output buffer */
3752 /* Create a buffer big enough for this packet. */
3753 max_buf_size
= get_memory_read_packet_size ();
3754 sizeof_buf
= max_buf_size
+ 1; /* Space for trailing NUL */
3755 buf
= alloca (sizeof_buf
);
3764 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
3766 /* construct "m"<memaddr>","<len>" */
3767 /* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */
3768 memaddr
= remote_address_masked (memaddr
);
3771 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
3773 p
+= hexnumstr (p
, (ULONGEST
) todo
);
3777 getpkt (buf
, sizeof_buf
, 0);
3780 && isxdigit (buf
[1]) && isxdigit (buf
[2])
3783 /* There is no correspondance between what the remote protocol uses
3784 for errors and errno codes. We would like a cleaner way of
3785 representing errors (big enough to include errno codes, bfd_error
3786 codes, and others). But for now just return EIO. */
3791 /* Reply describes memory byte by byte,
3792 each byte encoded as two hex characters. */
3795 if ((i
= hex2bin (p
, myaddr
, todo
)) < todo
)
3797 /* Reply is short. This means that we were able to read
3798 only part of what we wanted to. */
3799 return i
+ (origlen
- len
);
3808 /* Read or write LEN bytes from inferior memory at MEMADDR,
3809 transferring to or from debugger address BUFFER. Write to inferior if
3810 SHOULD_WRITE is nonzero. Returns length of data written or read; 0
3811 for error. TARGET is unused. */
3814 remote_xfer_memory (CORE_ADDR mem_addr
, char *buffer
, int mem_len
,
3815 int should_write
, struct mem_attrib
*attrib
,
3816 struct target_ops
*target
)
3818 CORE_ADDR targ_addr
;
3822 /* Should this be the selected frame? */
3823 gdbarch_remote_translate_xfer_address (current_gdbarch
, current_regcache
,
3825 &targ_addr
, &targ_len
);
3830 res
= remote_write_bytes (targ_addr
, buffer
, targ_len
);
3832 res
= remote_read_bytes (targ_addr
, buffer
, targ_len
);
3838 remote_files_info (struct target_ops
*ignore
)
3840 puts_filtered ("Debugging a target over a serial line.\n");
3843 /* Stuff for dealing with the packets which are part of this protocol.
3844 See comment at top of file for details. */
3846 /* Read a single character from the remote end, masking it down to 7 bits. */
3849 readchar (int timeout
)
3853 ch
= serial_readchar (remote_desc
, timeout
);
3858 switch ((enum serial_rc
) ch
)
3861 target_mourn_inferior ();
3862 error ("Remote connection closed");
3865 perror_with_name ("Remote communication error");
3867 case SERIAL_TIMEOUT
:
3873 /* Send the command in BUF to the remote machine, and read the reply
3874 into BUF. Report an error if we get an error reply. */
3877 remote_send (char *buf
,
3881 getpkt (buf
, sizeof_buf
, 0);
3884 error ("Remote failure reply: %s", buf
);
3887 /* Display a null-terminated packet on stdout, for debugging, using C
3891 print_packet (char *buf
)
3893 puts_filtered ("\"");
3894 fputstr_filtered (buf
, '"', gdb_stdout
);
3895 puts_filtered ("\"");
3901 return putpkt_binary (buf
, strlen (buf
));
3904 /* Send a packet to the remote machine, with error checking. The data
3905 of the packet is in BUF. The string in BUF can be at most (rs->remote_packet_size) - 5
3906 to account for the $, # and checksum, and for a possible /0 if we are
3907 debugging (remote_debug) and want to print the sent packet as a string */
3910 putpkt_binary (char *buf
, int cnt
)
3912 struct remote_state
*rs
= get_remote_state ();
3914 unsigned char csum
= 0;
3915 char *buf2
= alloca (cnt
+ 6);
3916 long sizeof_junkbuf
= (rs
->remote_packet_size
);
3917 char *junkbuf
= alloca (sizeof_junkbuf
);
3923 /* Copy the packet into buffer BUF2, encapsulating it
3924 and giving it a checksum. */
3929 for (i
= 0; i
< cnt
; i
++)
3935 *p
++ = tohex ((csum
>> 4) & 0xf);
3936 *p
++ = tohex (csum
& 0xf);
3938 /* Send it over and over until we get a positive ack. */
3942 int started_error_output
= 0;
3947 fprintf_unfiltered (gdb_stdlog
, "Sending packet: ");
3948 fputstrn_unfiltered (buf2
, p
- buf2
, 0, gdb_stdlog
);
3949 fprintf_unfiltered (gdb_stdlog
, "...");
3950 gdb_flush (gdb_stdlog
);
3952 if (serial_write (remote_desc
, buf2
, p
- buf2
))
3953 perror_with_name ("putpkt: write failed");
3955 /* read until either a timeout occurs (-2) or '+' is read */
3958 ch
= readchar (remote_timeout
);
3966 case SERIAL_TIMEOUT
:
3968 if (started_error_output
)
3970 putchar_unfiltered ('\n');
3971 started_error_output
= 0;
3980 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
3984 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
3985 case SERIAL_TIMEOUT
:
3989 break; /* Retransmit buffer */
3993 fprintf_unfiltered (gdb_stdlog
, "Packet instead of Ack, ignoring it\n");
3994 /* It's probably an old response, and we're out of sync.
3995 Just gobble up the packet and ignore it. */
3996 read_frame (junkbuf
, sizeof_junkbuf
);
3997 continue; /* Now, go look for + */
4002 if (!started_error_output
)
4004 started_error_output
= 1;
4005 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
4007 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
4011 break; /* Here to retransmit */
4015 /* This is wrong. If doing a long backtrace, the user should be
4016 able to get out next time we call QUIT, without anything as
4017 violent as interrupt_query. If we want to provide a way out of
4018 here without getting to the next QUIT, it should be based on
4019 hitting ^C twice as in remote_wait. */
4029 /* Come here after finding the start of the frame. Collect the rest
4030 into BUF, verifying the checksum, length, and handling run-length
4031 compression. No more than sizeof_buf-1 characters are read so that
4032 the buffer can be NUL terminated.
4034 Returns -1 on error, number of characters in buffer (ignoring the
4035 trailing NULL) on success. (could be extended to return one of the
4036 SERIAL status indications). */
4039 read_frame (char *buf
,
4051 /* ASSERT (bc < sizeof_buf - 1) - space for trailing NUL */
4052 c
= readchar (remote_timeout
);
4055 case SERIAL_TIMEOUT
:
4057 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
4061 fputs_filtered ("Saw new packet start in middle of old one\n",
4063 return -1; /* Start a new packet, count retries */
4066 unsigned char pktcsum
;
4072 check_0
= readchar (remote_timeout
);
4074 check_1
= readchar (remote_timeout
);
4076 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
4079 fputs_filtered ("Timeout in checksum, retrying\n", gdb_stdlog
);
4082 else if (check_0
< 0 || check_1
< 0)
4085 fputs_filtered ("Communication error in checksum\n", gdb_stdlog
);
4089 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
4090 if (csum
== pktcsum
)
4095 fprintf_filtered (gdb_stdlog
,
4096 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
4098 fputs_filtered (buf
, gdb_stdlog
);
4099 fputs_filtered ("\n", gdb_stdlog
);
4101 /* Number of characters in buffer ignoring trailing
4105 case '*': /* Run length encoding */
4110 c
= readchar (remote_timeout
);
4112 repeat
= c
- ' ' + 3; /* Compute repeat count */
4114 /* The character before ``*'' is repeated. */
4116 if (repeat
> 0 && repeat
<= 255
4118 && bc
+ repeat
- 1 < sizeof_buf
- 1)
4120 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
4126 printf_filtered ("Repeat count %d too large for buffer: ", repeat
);
4127 puts_filtered (buf
);
4128 puts_filtered ("\n");
4132 if (bc
< sizeof_buf
- 1)
4140 puts_filtered ("Remote packet too long: ");
4141 puts_filtered (buf
);
4142 puts_filtered ("\n");
4149 /* Read a packet from the remote machine, with error checking, and
4150 store it in BUF. If FOREVER, wait forever rather than timing out;
4151 this is used (in synchronous mode) to wait for a target that is is
4152 executing user code to stop. */
4153 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
4154 don't have to change all the calls to getpkt to deal with the
4155 return value, because at the moment I don't know what the right
4156 thing to do it for those. */
4164 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
4168 /* Read a packet from the remote machine, with error checking, and
4169 store it in BUF. If FOREVER, wait forever rather than timing out;
4170 this is used (in synchronous mode) to wait for a target that is is
4171 executing user code to stop. If FOREVER == 0, this function is
4172 allowed to time out gracefully and return an indication of this to
4175 getpkt_sane (char *buf
,
4184 strcpy (buf
, "timeout");
4188 timeout
= watchdog
> 0 ? watchdog
: -1;
4192 timeout
= remote_timeout
;
4196 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
4198 /* This can loop forever if the remote side sends us characters
4199 continuously, but if it pauses, we'll get a zero from readchar
4200 because of timeout. Then we'll count that as a retry. */
4202 /* Note that we will only wait forever prior to the start of a packet.
4203 After that, we expect characters to arrive at a brisk pace. They
4204 should show up within remote_timeout intervals. */
4208 c
= readchar (timeout
);
4210 if (c
== SERIAL_TIMEOUT
)
4212 if (forever
) /* Watchdog went off? Kill the target. */
4215 target_mourn_inferior ();
4216 error ("Watchdog has expired. Target detached.\n");
4219 fputs_filtered ("Timed out.\n", gdb_stdlog
);
4225 /* We've found the start of a packet, now collect the data. */
4227 val
= read_frame (buf
, sizeof_buf
);
4233 fprintf_unfiltered (gdb_stdlog
, "Packet received: ");
4234 fputstr_unfiltered (buf
, 0, gdb_stdlog
);
4235 fprintf_unfiltered (gdb_stdlog
, "\n");
4237 serial_write (remote_desc
, "+", 1);
4241 /* Try the whole thing again. */
4243 serial_write (remote_desc
, "-", 1);
4246 /* We have tried hard enough, and just can't receive the packet. Give up. */
4248 printf_unfiltered ("Ignoring packet error, continuing...\n");
4249 serial_write (remote_desc
, "+", 1);
4256 /* For some mysterious reason, wait_for_inferior calls kill instead of
4257 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4261 target_mourn_inferior ();
4265 /* Use catch_errors so the user can quit from gdb even when we aren't on
4266 speaking terms with the remote system. */
4267 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4269 /* Don't wait for it to die. I'm not really sure it matters whether
4270 we do or not. For the existing stubs, kill is a noop. */
4271 target_mourn_inferior ();
4274 /* Async version of remote_kill. */
4276 remote_async_kill (void)
4278 /* Unregister the file descriptor from the event loop. */
4279 if (target_is_async_p ())
4280 serial_async (remote_desc
, NULL
, 0);
4282 /* For some mysterious reason, wait_for_inferior calls kill instead of
4283 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4287 target_mourn_inferior ();
4291 /* Use catch_errors so the user can quit from gdb even when we aren't on
4292 speaking terms with the remote system. */
4293 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4295 /* Don't wait for it to die. I'm not really sure it matters whether
4296 we do or not. For the existing stubs, kill is a noop. */
4297 target_mourn_inferior ();
4303 remote_mourn_1 (&remote_ops
);
4307 remote_async_mourn (void)
4309 remote_mourn_1 (&remote_async_ops
);
4313 extended_remote_mourn (void)
4315 /* We do _not_ want to mourn the target like this; this will
4316 remove the extended remote target from the target stack,
4317 and the next time the user says "run" it'll fail.
4319 FIXME: What is the right thing to do here? */
4321 remote_mourn_1 (&extended_remote_ops
);
4325 /* Worker function for remote_mourn. */
4327 remote_mourn_1 (struct target_ops
*target
)
4329 unpush_target (target
);
4330 generic_mourn_inferior ();
4333 /* In the extended protocol we want to be able to do things like
4334 "run" and have them basically work as expected. So we need
4335 a special create_inferior function.
4337 FIXME: One day add support for changing the exec file
4338 we're debugging, arguments and an environment. */
4341 extended_remote_create_inferior (char *exec_file
, char *args
, char **env
)
4343 /* Rip out the breakpoints; we'll reinsert them after restarting
4344 the remote server. */
4345 remove_breakpoints ();
4347 /* Now restart the remote server. */
4348 extended_remote_restart ();
4350 /* Now put the breakpoints back in. This way we're safe if the
4351 restart function works via a unix fork on the remote side. */
4352 insert_breakpoints ();
4354 /* Clean up from the last time we were running. */
4355 clear_proceed_status ();
4357 /* Let the remote process run. */
4358 proceed (-1, TARGET_SIGNAL_0
, 0);
4361 /* Async version of extended_remote_create_inferior. */
4363 extended_remote_async_create_inferior (char *exec_file
, char *args
, char **env
)
4365 /* Rip out the breakpoints; we'll reinsert them after restarting
4366 the remote server. */
4367 remove_breakpoints ();
4369 /* If running asynchronously, register the target file descriptor
4370 with the event loop. */
4371 if (event_loop_p
&& target_can_async_p ())
4372 target_async (inferior_event_handler
, 0);
4374 /* Now restart the remote server. */
4375 extended_remote_restart ();
4377 /* Now put the breakpoints back in. This way we're safe if the
4378 restart function works via a unix fork on the remote side. */
4379 insert_breakpoints ();
4381 /* Clean up from the last time we were running. */
4382 clear_proceed_status ();
4384 /* Let the remote process run. */
4385 proceed (-1, TARGET_SIGNAL_0
, 0);
4389 /* On some machines, e.g. 68k, we may use a different breakpoint
4390 instruction than other targets; in those use
4391 DEPRECATED_REMOTE_BREAKPOINT instead of just BREAKPOINT_FROM_PC.
4392 Also, bi-endian targets may define
4393 DEPRECATED_LITTLE_REMOTE_BREAKPOINT and
4394 DEPRECATED_BIG_REMOTE_BREAKPOINT. If none of these are defined, we
4395 just call the standard routines that are in mem-break.c. */
4397 /* NOTE: cagney/2003-06-08: This is silly. A remote and simulator
4398 target should use an identical BREAKPOINT_FROM_PC. As for native,
4399 the ARCH-OS-tdep.c code can override the default. */
4401 #if defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && defined (DEPRECATED_BIG_REMOTE_BREAKPOINT) && !defined(DEPRECATED_REMOTE_BREAKPOINT)
4402 #define DEPRECATED_REMOTE_BREAKPOINT
4405 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4407 /* If the target isn't bi-endian, just pretend it is. */
4408 #if !defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && !defined (DEPRECATED_BIG_REMOTE_BREAKPOINT)
4409 #define DEPRECATED_LITTLE_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
4410 #define DEPRECATED_BIG_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
4413 static unsigned char big_break_insn
[] = DEPRECATED_BIG_REMOTE_BREAKPOINT
;
4414 static unsigned char little_break_insn
[] = DEPRECATED_LITTLE_REMOTE_BREAKPOINT
;
4416 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4418 /* Insert a breakpoint on targets that don't have any better
4419 breakpoint support. We read the contents of the target location
4420 and stash it, then overwrite it with a breakpoint instruction.
4421 ADDR is the target location in the target machine. CONTENTS_CACHE
4422 is a pointer to memory allocated for saving the target contents.
4423 It is guaranteed by the caller to be long enough to save the number
4424 of bytes returned by BREAKPOINT_FROM_PC. */
4427 remote_insert_breakpoint (CORE_ADDR addr
, char *contents_cache
)
4429 struct remote_state
*rs
= get_remote_state ();
4430 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4435 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
4436 If it succeeds, then set the support to PACKET_ENABLE. If it
4437 fails, and the user has explicitly requested the Z support then
4438 report an error, otherwise, mark it disabled and go on. */
4440 if (remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
].support
!= PACKET_DISABLE
)
4442 char *buf
= alloca (rs
->remote_packet_size
);
4445 addr
= remote_address_masked (addr
);
4449 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4450 BREAKPOINT_FROM_PC (&addr
, &bp_size
);
4451 sprintf (p
, ",%d", bp_size
);
4454 getpkt (buf
, (rs
->remote_packet_size
), 0);
4456 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]))
4462 case PACKET_UNKNOWN
:
4467 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4468 val
= target_read_memory (addr
, contents_cache
, sizeof big_break_insn
);
4472 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
4473 val
= target_write_memory (addr
, (char *) big_break_insn
,
4474 sizeof big_break_insn
);
4476 val
= target_write_memory (addr
, (char *) little_break_insn
,
4477 sizeof little_break_insn
);
4482 return memory_insert_breakpoint (addr
, contents_cache
);
4483 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4487 remote_remove_breakpoint (CORE_ADDR addr
, char *contents_cache
)
4489 struct remote_state
*rs
= get_remote_state ();
4492 if (remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
].support
!= PACKET_DISABLE
)
4494 char *buf
= alloca (rs
->remote_packet_size
);
4501 addr
= remote_address_masked (addr
);
4502 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4503 BREAKPOINT_FROM_PC (&addr
, &bp_size
);
4504 sprintf (p
, ",%d", bp_size
);
4507 getpkt (buf
, (rs
->remote_packet_size
), 0);
4509 return (buf
[0] == 'E');
4512 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4513 return target_write_memory (addr
, contents_cache
, sizeof big_break_insn
);
4515 return memory_remove_breakpoint (addr
, contents_cache
);
4516 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4520 watchpoint_to_Z_packet (int type
)
4534 internal_error (__FILE__
, __LINE__
,
4535 "hw_bp_to_z: bad watchpoint type %d", type
);
4540 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
4542 struct remote_state
*rs
= get_remote_state ();
4543 char *buf
= alloca (rs
->remote_packet_size
);
4545 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
4547 if (remote_protocol_Z
[packet
].support
== PACKET_DISABLE
)
4548 error ("Can't set hardware watchpoints without the '%s' (%s) packet\n",
4549 remote_protocol_Z
[packet
].name
,
4550 remote_protocol_Z
[packet
].title
);
4552 sprintf (buf
, "Z%x,", packet
);
4553 p
= strchr (buf
, '\0');
4554 addr
= remote_address_masked (addr
);
4555 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4556 sprintf (p
, ",%x", len
);
4559 getpkt (buf
, (rs
->remote_packet_size
), 0);
4561 switch (packet_ok (buf
, &remote_protocol_Z
[packet
]))
4564 case PACKET_UNKNOWN
:
4569 internal_error (__FILE__
, __LINE__
,
4570 "remote_insert_watchpoint: reached end of function");
4575 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
4577 struct remote_state
*rs
= get_remote_state ();
4578 char *buf
= alloca (rs
->remote_packet_size
);
4580 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
4582 if (remote_protocol_Z
[packet
].support
== PACKET_DISABLE
)
4583 error ("Can't clear hardware watchpoints without the '%s' (%s) packet\n",
4584 remote_protocol_Z
[packet
].name
,
4585 remote_protocol_Z
[packet
].title
);
4587 sprintf (buf
, "z%x,", packet
);
4588 p
= strchr (buf
, '\0');
4589 addr
= remote_address_masked (addr
);
4590 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4591 sprintf (p
, ",%x", len
);
4593 getpkt (buf
, (rs
->remote_packet_size
), 0);
4595 switch (packet_ok (buf
, &remote_protocol_Z
[packet
]))
4598 case PACKET_UNKNOWN
:
4603 internal_error (__FILE__
, __LINE__
,
4604 "remote_remove_watchpoint: reached end of function");
4608 int remote_hw_watchpoint_limit
= -1;
4609 int remote_hw_breakpoint_limit
= -1;
4612 remote_check_watch_resources (int type
, int cnt
, int ot
)
4614 if (type
== bp_hardware_breakpoint
)
4616 if (remote_hw_breakpoint_limit
== 0)
4618 else if (remote_hw_breakpoint_limit
< 0)
4620 else if (cnt
<= remote_hw_breakpoint_limit
)
4625 if (remote_hw_watchpoint_limit
== 0)
4627 else if (remote_hw_watchpoint_limit
< 0)
4631 else if (cnt
<= remote_hw_watchpoint_limit
)
4638 remote_stopped_by_watchpoint (void)
4640 return remote_stopped_by_watchpoint_p
;
4643 extern int stepped_after_stopped_by_watchpoint
;
4646 remote_stopped_data_address (void)
4648 if (remote_stopped_by_watchpoint ()
4649 || stepped_after_stopped_by_watchpoint
)
4650 return remote_watch_data_address
;
4651 return (CORE_ADDR
)0;
4656 remote_insert_hw_breakpoint (CORE_ADDR addr
, char *shadow
)
4659 struct remote_state
*rs
= get_remote_state ();
4660 char *buf
= alloca (rs
->remote_packet_size
);
4663 /* The length field should be set to the size of a breakpoint
4666 BREAKPOINT_FROM_PC (&addr
, &len
);
4668 if (remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].support
== PACKET_DISABLE
)
4669 error ("Can't set hardware breakpoint without the '%s' (%s) packet\n",
4670 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].name
,
4671 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].title
);
4677 addr
= remote_address_masked (addr
);
4678 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4679 sprintf (p
, ",%x", len
);
4682 getpkt (buf
, (rs
->remote_packet_size
), 0);
4684 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]))
4687 case PACKET_UNKNOWN
:
4692 internal_error (__FILE__
, __LINE__
,
4693 "remote_insert_hw_breakpoint: reached end of function");
4698 remote_remove_hw_breakpoint (CORE_ADDR addr
, char *shadow
)
4701 struct remote_state
*rs
= get_remote_state ();
4702 char *buf
= alloca (rs
->remote_packet_size
);
4705 /* The length field should be set to the size of a breakpoint
4708 BREAKPOINT_FROM_PC (&addr
, &len
);
4710 if (remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].support
== PACKET_DISABLE
)
4711 error ("Can't clear hardware breakpoint without the '%s' (%s) packet\n",
4712 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].name
,
4713 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].title
);
4719 addr
= remote_address_masked (addr
);
4720 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4721 sprintf (p
, ",%x", len
);
4724 getpkt (buf
, (rs
->remote_packet_size
), 0);
4726 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]))
4729 case PACKET_UNKNOWN
:
4734 internal_error (__FILE__
, __LINE__
,
4735 "remote_remove_hw_breakpoint: reached end of function");
4738 /* Some targets are only capable of doing downloads, and afterwards
4739 they switch to the remote serial protocol. This function provides
4740 a clean way to get from the download target to the remote target.
4741 It's basically just a wrapper so that we don't have to expose any
4742 of the internal workings of remote.c.
4744 Prior to calling this routine, you should shutdown the current
4745 target code, else you will get the "A program is being debugged
4746 already..." message. Usually a call to pop_target() suffices. */
4749 push_remote_target (char *name
, int from_tty
)
4751 printf_filtered ("Switching to remote protocol\n");
4752 remote_open (name
, from_tty
);
4755 /* Table used by the crc32 function to calcuate the checksum. */
4757 static unsigned long crc32_table
[256] =
4760 static unsigned long
4761 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
4763 if (!crc32_table
[1])
4765 /* Initialize the CRC table and the decoding table. */
4769 for (i
= 0; i
< 256; i
++)
4771 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
4772 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
4779 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
4785 /* compare-sections command
4787 With no arguments, compares each loadable section in the exec bfd
4788 with the same memory range on the target, and reports mismatches.
4789 Useful for verifying the image on the target against the exec file.
4790 Depends on the target understanding the new "qCRC:" request. */
4792 /* FIXME: cagney/1999-10-26: This command should be broken down into a
4793 target method (target verify memory) and generic version of the
4794 actual command. This will allow other high-level code (especially
4795 generic_load()) to make use of this target functionality. */
4798 compare_sections_command (char *args
, int from_tty
)
4800 struct remote_state
*rs
= get_remote_state ();
4802 unsigned long host_crc
, target_crc
;
4803 extern bfd
*exec_bfd
;
4804 struct cleanup
*old_chain
;
4807 const char *sectname
;
4808 char *buf
= alloca (rs
->remote_packet_size
);
4815 error ("command cannot be used without an exec file");
4816 if (!current_target
.to_shortname
||
4817 strcmp (current_target
.to_shortname
, "remote") != 0)
4818 error ("command can only be used with remote target");
4820 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
4822 if (!(s
->flags
& SEC_LOAD
))
4823 continue; /* skip non-loadable section */
4825 size
= bfd_get_section_size_before_reloc (s
);
4827 continue; /* skip zero-length section */
4829 sectname
= bfd_get_section_name (exec_bfd
, s
);
4830 if (args
&& strcmp (args
, sectname
) != 0)
4831 continue; /* not the section selected by user */
4833 matched
= 1; /* do this section */
4835 /* FIXME: assumes lma can fit into long */
4836 sprintf (buf
, "qCRC:%lx,%lx", (long) lma
, (long) size
);
4839 /* be clever; compute the host_crc before waiting for target reply */
4840 sectdata
= xmalloc (size
);
4841 old_chain
= make_cleanup (xfree
, sectdata
);
4842 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
4843 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
4845 getpkt (buf
, (rs
->remote_packet_size
), 0);
4847 error ("target memory fault, section %s, range 0x%s -- 0x%s",
4848 sectname
, paddr (lma
), paddr (lma
+ size
));
4850 error ("remote target does not support this operation");
4852 for (target_crc
= 0, tmp
= &buf
[1]; *tmp
; tmp
++)
4853 target_crc
= target_crc
* 16 + fromhex (*tmp
);
4855 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
4856 sectname
, paddr (lma
), paddr (lma
+ size
));
4857 if (host_crc
== target_crc
)
4858 printf_filtered ("matched.\n");
4861 printf_filtered ("MIS-MATCHED!\n");
4865 do_cleanups (old_chain
);
4868 warning ("One or more sections of the remote executable does not match\n\
4869 the loaded file\n");
4870 if (args
&& !matched
)
4871 printf_filtered ("No loaded section named '%s'.\n", args
);
4875 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
4876 const char *annex
, void *readbuf
, const void *writebuf
,
4877 ULONGEST offset
, LONGEST len
)
4879 struct remote_state
*rs
= get_remote_state ();
4881 char *buf2
= alloca (rs
->remote_packet_size
);
4882 char *p2
= &buf2
[0];
4885 /* Only handle reads. */
4886 if (writebuf
!= NULL
|| readbuf
== NULL
)
4889 /* Map pre-existing objects onto letters. DO NOT do this for new
4890 objects!!! Instead specify new query packets. */
4893 case TARGET_OBJECT_KOD
:
4896 case TARGET_OBJECT_AVR
:
4900 case TARGET_OBJECT_AUXV
:
4901 if (remote_protocol_qPart_auxv
.support
!= PACKET_DISABLE
)
4903 unsigned int total
= 0;
4906 LONGEST n
= min ((rs
->remote_packet_size
- 2) / 2, len
);
4907 snprintf (buf2
, rs
->remote_packet_size
,
4908 "qPart:auxv:read::%s,%s",
4909 phex_nz (offset
, sizeof offset
),
4910 phex_nz (n
, sizeof n
));
4913 return total
> 0 ? total
: i
;
4915 getpkt (buf2
, rs
->remote_packet_size
, 0);
4916 if (packet_ok (buf2
, &remote_protocol_qPart_auxv
) != PACKET_OK
)
4917 return total
> 0 ? total
: -1;
4918 if (buf2
[0] == 'O' && buf2
[1] == 'K' && buf2
[2] == '\0')
4919 break; /* Got EOF indicator. */
4920 /* Got some data. */
4921 i
= hex2bin (buf2
, readbuf
, len
);
4924 readbuf
= (void *) ((char *) readbuf
+ i
);
4938 /* Note: a zero OFFSET and LEN can be used to query the minimum
4940 if (offset
== 0 && len
== 0)
4941 return (rs
->remote_packet_size
);
4942 /* Minimum outbuf size is (rs->remote_packet_size) - if bufsiz is
4943 not large enough let the caller. */
4944 if (len
< (rs
->remote_packet_size
))
4946 len
= rs
->remote_packet_size
;
4948 /* except for querying the minimum buffer size, target must be open */
4950 error ("remote query is only available after target open");
4952 gdb_assert (annex
!= NULL
);
4953 gdb_assert (readbuf
!= NULL
);
4958 /* we used one buffer char for the remote protocol q command and another
4959 for the query type. As the remote protocol encapsulation uses 4 chars
4960 plus one extra in case we are debugging (remote_debug),
4961 we have PBUFZIZ - 7 left to pack the query string */
4963 while (annex
[i
] && (i
< ((rs
->remote_packet_size
) - 8)))
4965 /* Bad caller may have sent forbidden characters. */
4966 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
4971 gdb_assert (annex
[i
] == '\0');
4977 getpkt (readbuf
, len
, 0);
4979 return strlen (readbuf
);
4983 remote_rcmd (char *command
,
4984 struct ui_file
*outbuf
)
4986 struct remote_state
*rs
= get_remote_state ();
4988 char *buf
= alloca (rs
->remote_packet_size
);
4992 error ("remote rcmd is only available after target open");
4994 /* Send a NULL command across as an empty command */
4995 if (command
== NULL
)
4998 /* The query prefix */
4999 strcpy (buf
, "qRcmd,");
5000 p
= strchr (buf
, '\0');
5002 if ((strlen (buf
) + strlen (command
) * 2 + 8/*misc*/) > (rs
->remote_packet_size
))
5003 error ("\"monitor\" command ``%s'' is too long\n", command
);
5005 /* Encode the actual command */
5006 bin2hex (command
, p
, 0);
5008 if (putpkt (buf
) < 0)
5009 error ("Communication problem with target\n");
5011 /* get/display the response */
5014 /* XXX - see also tracepoint.c:remote_get_noisy_reply() */
5016 getpkt (buf
, (rs
->remote_packet_size
), 0);
5018 error ("Target does not support this command\n");
5019 if (buf
[0] == 'O' && buf
[1] != 'K')
5021 remote_console_output (buf
+ 1); /* 'O' message from stub */
5024 if (strcmp (buf
, "OK") == 0)
5026 if (strlen (buf
) == 3 && buf
[0] == 'E'
5027 && isdigit (buf
[1]) && isdigit (buf
[2]))
5029 error ("Protocol error with Rcmd");
5031 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
5033 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
5034 fputc_unfiltered (c
, outbuf
);
5041 packet_command (char *args
, int from_tty
)
5043 struct remote_state
*rs
= get_remote_state ();
5044 char *buf
= alloca (rs
->remote_packet_size
);
5047 error ("command can only be used with remote target");
5050 error ("remote-packet command requires packet text as argument");
5052 puts_filtered ("sending: ");
5053 print_packet (args
);
5054 puts_filtered ("\n");
5057 getpkt (buf
, (rs
->remote_packet_size
), 0);
5058 puts_filtered ("received: ");
5060 puts_filtered ("\n");
5064 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------------- */
5066 static void display_thread_info (struct gdb_ext_thread_info
*info
);
5068 static void threadset_test_cmd (char *cmd
, int tty
);
5070 static void threadalive_test (char *cmd
, int tty
);
5072 static void threadlist_test_cmd (char *cmd
, int tty
);
5074 int get_and_display_threadinfo (threadref
* ref
);
5076 static void threadinfo_test_cmd (char *cmd
, int tty
);
5078 static int thread_display_step (threadref
* ref
, void *context
);
5080 static void threadlist_update_test_cmd (char *cmd
, int tty
);
5082 static void init_remote_threadtests (void);
5084 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid */
5087 threadset_test_cmd (char *cmd
, int tty
)
5089 int sample_thread
= SAMPLE_THREAD
;
5091 printf_filtered ("Remote threadset test\n");
5092 set_thread (sample_thread
, 1);
5097 threadalive_test (char *cmd
, int tty
)
5099 int sample_thread
= SAMPLE_THREAD
;
5101 if (remote_thread_alive (pid_to_ptid (sample_thread
)))
5102 printf_filtered ("PASS: Thread alive test\n");
5104 printf_filtered ("FAIL: Thread alive test\n");
5107 void output_threadid (char *title
, threadref
* ref
);
5110 output_threadid (char *title
, threadref
*ref
)
5114 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex */
5116 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
5120 threadlist_test_cmd (char *cmd
, int tty
)
5123 threadref nextthread
;
5124 int done
, result_count
;
5125 threadref threadlist
[3];
5127 printf_filtered ("Remote Threadlist test\n");
5128 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
5129 &result_count
, &threadlist
[0]))
5130 printf_filtered ("FAIL: threadlist test\n");
5133 threadref
*scan
= threadlist
;
5134 threadref
*limit
= scan
+ result_count
;
5136 while (scan
< limit
)
5137 output_threadid (" thread ", scan
++);
5142 display_thread_info (struct gdb_ext_thread_info
*info
)
5144 output_threadid ("Threadid: ", &info
->threadid
);
5145 printf_filtered ("Name: %s\n ", info
->shortname
);
5146 printf_filtered ("State: %s\n", info
->display
);
5147 printf_filtered ("other: %s\n\n", info
->more_display
);
5151 get_and_display_threadinfo (threadref
*ref
)
5155 struct gdb_ext_thread_info threadinfo
;
5157 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
5158 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
5159 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
5160 display_thread_info (&threadinfo
);
5165 threadinfo_test_cmd (char *cmd
, int tty
)
5167 int athread
= SAMPLE_THREAD
;
5171 int_to_threadref (&thread
, athread
);
5172 printf_filtered ("Remote Threadinfo test\n");
5173 if (!get_and_display_threadinfo (&thread
))
5174 printf_filtered ("FAIL cannot get thread info\n");
5178 thread_display_step (threadref
*ref
, void *context
)
5180 /* output_threadid(" threadstep ",ref); *//* simple test */
5181 return get_and_display_threadinfo (ref
);
5185 threadlist_update_test_cmd (char *cmd
, int tty
)
5187 printf_filtered ("Remote Threadlist update test\n");
5188 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
5192 init_remote_threadtests (void)
5194 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
5195 "Fetch and print the remote list of thread identifiers, one pkt only");
5196 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
5197 "Fetch and display info about one thread");
5198 add_com ("tset", class_obscure
, threadset_test_cmd
,
5199 "Test setting to a different thread");
5200 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
5201 "Iterate through updating all remote thread info");
5202 add_com ("talive", class_obscure
, threadalive_test
,
5203 " Remote thread alive test ");
5208 /* Convert a thread ID to a string. Returns the string in a static
5212 remote_pid_to_str (ptid_t ptid
)
5214 static char buf
[30];
5216 sprintf (buf
, "Thread %d", PIDGET (ptid
));
5221 init_remote_ops (void)
5223 remote_ops
.to_shortname
= "remote";
5224 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
5226 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5227 Specify the serial device it is connected to\n\
5228 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
5229 remote_ops
.to_open
= remote_open
;
5230 remote_ops
.to_close
= remote_close
;
5231 remote_ops
.to_detach
= remote_detach
;
5232 remote_ops
.to_disconnect
= remote_disconnect
;
5233 remote_ops
.to_resume
= remote_resume
;
5234 remote_ops
.to_wait
= remote_wait
;
5235 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
5236 remote_ops
.to_store_registers
= remote_store_registers
;
5237 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5238 remote_ops
.to_xfer_memory
= remote_xfer_memory
;
5239 remote_ops
.to_files_info
= remote_files_info
;
5240 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5241 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5242 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
5243 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
5244 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
5245 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
5246 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
5247 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
5248 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
5249 remote_ops
.to_kill
= remote_kill
;
5250 remote_ops
.to_load
= generic_load
;
5251 remote_ops
.to_mourn_inferior
= remote_mourn
;
5252 remote_ops
.to_thread_alive
= remote_thread_alive
;
5253 remote_ops
.to_find_new_threads
= remote_threads_info
;
5254 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
5255 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5256 remote_ops
.to_stop
= remote_stop
;
5257 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
5258 remote_ops
.to_rcmd
= remote_rcmd
;
5259 remote_ops
.to_stratum
= process_stratum
;
5260 remote_ops
.to_has_all_memory
= 1;
5261 remote_ops
.to_has_memory
= 1;
5262 remote_ops
.to_has_stack
= 1;
5263 remote_ops
.to_has_registers
= 1;
5264 remote_ops
.to_has_execution
= 1;
5265 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
5266 remote_ops
.to_magic
= OPS_MAGIC
;
5269 /* Set up the extended remote vector by making a copy of the standard
5270 remote vector and adding to it. */
5273 init_extended_remote_ops (void)
5275 extended_remote_ops
= remote_ops
;
5277 extended_remote_ops
.to_shortname
= "extended-remote";
5278 extended_remote_ops
.to_longname
=
5279 "Extended remote serial target in gdb-specific protocol";
5280 extended_remote_ops
.to_doc
=
5281 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5282 Specify the serial device it is connected to (e.g. /dev/ttya).",
5283 extended_remote_ops
.to_open
= extended_remote_open
;
5284 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
5285 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
5289 remote_can_async_p (void)
5291 /* We're async whenever the serial device is. */
5292 return (current_target
.to_async_mask_value
) && serial_can_async_p (remote_desc
);
5296 remote_is_async_p (void)
5298 /* We're async whenever the serial device is. */
5299 return (current_target
.to_async_mask_value
) && serial_is_async_p (remote_desc
);
5302 /* Pass the SERIAL event on and up to the client. One day this code
5303 will be able to delay notifying the client of an event until the
5304 point where an entire packet has been received. */
5306 static void (*async_client_callback
) (enum inferior_event_type event_type
, void *context
);
5307 static void *async_client_context
;
5308 static serial_event_ftype remote_async_serial_handler
;
5311 remote_async_serial_handler (struct serial
*scb
, void *context
)
5313 /* Don't propogate error information up to the client. Instead let
5314 the client find out about the error by querying the target. */
5315 async_client_callback (INF_REG_EVENT
, async_client_context
);
5319 remote_async (void (*callback
) (enum inferior_event_type event_type
, void *context
), void *context
)
5321 if (current_target
.to_async_mask_value
== 0)
5322 internal_error (__FILE__
, __LINE__
,
5323 "Calling remote_async when async is masked");
5325 if (callback
!= NULL
)
5327 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
5328 async_client_callback
= callback
;
5329 async_client_context
= context
;
5332 serial_async (remote_desc
, NULL
, NULL
);
5335 /* Target async and target extended-async.
5337 This are temporary targets, until it is all tested. Eventually
5338 async support will be incorporated int the usual 'remote'
5342 init_remote_async_ops (void)
5344 remote_async_ops
.to_shortname
= "async";
5345 remote_async_ops
.to_longname
= "Remote serial target in async version of the gdb-specific protocol";
5346 remote_async_ops
.to_doc
=
5347 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5348 Specify the serial device it is connected to (e.g. /dev/ttya).";
5349 remote_async_ops
.to_open
= remote_async_open
;
5350 remote_async_ops
.to_close
= remote_close
;
5351 remote_async_ops
.to_detach
= remote_detach
;
5352 remote_async_ops
.to_disconnect
= remote_disconnect
;
5353 remote_async_ops
.to_resume
= remote_async_resume
;
5354 remote_async_ops
.to_wait
= remote_async_wait
;
5355 remote_async_ops
.to_fetch_registers
= remote_fetch_registers
;
5356 remote_async_ops
.to_store_registers
= remote_store_registers
;
5357 remote_async_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5358 remote_async_ops
.to_xfer_memory
= remote_xfer_memory
;
5359 remote_async_ops
.to_files_info
= remote_files_info
;
5360 remote_async_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5361 remote_async_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5362 remote_async_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
5363 remote_async_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
5364 remote_async_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
5365 remote_async_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
5366 remote_async_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
5367 remote_async_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
5368 remote_async_ops
.to_stopped_data_address
= remote_stopped_data_address
;
5369 remote_async_ops
.to_terminal_inferior
= remote_async_terminal_inferior
;
5370 remote_async_ops
.to_terminal_ours
= remote_async_terminal_ours
;
5371 remote_async_ops
.to_kill
= remote_async_kill
;
5372 remote_async_ops
.to_load
= generic_load
;
5373 remote_async_ops
.to_mourn_inferior
= remote_async_mourn
;
5374 remote_async_ops
.to_thread_alive
= remote_thread_alive
;
5375 remote_async_ops
.to_find_new_threads
= remote_threads_info
;
5376 remote_async_ops
.to_pid_to_str
= remote_pid_to_str
;
5377 remote_async_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5378 remote_async_ops
.to_stop
= remote_stop
;
5379 remote_async_ops
.to_xfer_partial
= remote_xfer_partial
;
5380 remote_async_ops
.to_rcmd
= remote_rcmd
;
5381 remote_async_ops
.to_stratum
= process_stratum
;
5382 remote_async_ops
.to_has_all_memory
= 1;
5383 remote_async_ops
.to_has_memory
= 1;
5384 remote_async_ops
.to_has_stack
= 1;
5385 remote_async_ops
.to_has_registers
= 1;
5386 remote_async_ops
.to_has_execution
= 1;
5387 remote_async_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
5388 remote_async_ops
.to_can_async_p
= remote_can_async_p
;
5389 remote_async_ops
.to_is_async_p
= remote_is_async_p
;
5390 remote_async_ops
.to_async
= remote_async
;
5391 remote_async_ops
.to_async_mask_value
= 1;
5392 remote_async_ops
.to_magic
= OPS_MAGIC
;
5395 /* Set up the async extended remote vector by making a copy of the standard
5396 remote vector and adding to it. */
5399 init_extended_async_remote_ops (void)
5401 extended_async_remote_ops
= remote_async_ops
;
5403 extended_async_remote_ops
.to_shortname
= "extended-async";
5404 extended_async_remote_ops
.to_longname
=
5405 "Extended remote serial target in async gdb-specific protocol";
5406 extended_async_remote_ops
.to_doc
=
5407 "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
5408 Specify the serial device it is connected to (e.g. /dev/ttya).",
5409 extended_async_remote_ops
.to_open
= extended_remote_async_open
;
5410 extended_async_remote_ops
.to_create_inferior
= extended_remote_async_create_inferior
;
5411 extended_async_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
5415 set_remote_cmd (char *args
, int from_tty
)
5420 show_remote_cmd (char *args
, int from_tty
)
5422 /* FIXME: cagney/2002-06-15: This function should iterate over
5423 remote_show_cmdlist for a list of sub commands to show. */
5424 show_remote_protocol_Z_packet_cmd (args
, from_tty
, NULL
);
5425 show_remote_protocol_e_packet_cmd (args
, from_tty
, NULL
);
5426 show_remote_protocol_E_packet_cmd (args
, from_tty
, NULL
);
5427 show_remote_protocol_P_packet_cmd (args
, from_tty
, NULL
);
5428 show_remote_protocol_qSymbol_packet_cmd (args
, from_tty
, NULL
);
5429 show_remote_protocol_vcont_packet_cmd (args
, from_tty
, NULL
);
5430 show_remote_protocol_binary_download_cmd (args
, from_tty
, NULL
);
5431 show_remote_protocol_qPart_auxv_packet_cmd (args
, from_tty
, NULL
);
5435 build_remote_gdbarch_data (void)
5437 remote_address_size
= TARGET_ADDR_BIT
;
5440 /* Saved pointer to previous owner of the new_objfile event. */
5441 static void (*remote_new_objfile_chain
) (struct objfile
*);
5443 /* Function to be called whenever a new objfile (shlib) is detected. */
5445 remote_new_objfile (struct objfile
*objfile
)
5447 if (remote_desc
!= 0) /* Have a remote connection */
5449 remote_check_symbols (objfile
);
5451 /* Call predecessor on chain, if any. */
5452 if (remote_new_objfile_chain
!= 0 &&
5454 remote_new_objfile_chain (objfile
);
5458 _initialize_remote (void)
5460 static struct cmd_list_element
*remote_set_cmdlist
;
5461 static struct cmd_list_element
*remote_show_cmdlist
;
5462 struct cmd_list_element
*tmpcmd
;
5464 /* architecture specific data */
5465 remote_gdbarch_data_handle
= gdbarch_data_register_post_init (init_remote_state
);
5467 /* Old tacky stuff. NOTE: This comes after the remote protocol so
5468 that the remote protocol has been initialized. */
5469 DEPRECATED_REGISTER_GDBARCH_SWAP (remote_address_size
);
5470 deprecated_register_gdbarch_swap (NULL
, 0, build_remote_gdbarch_data
);
5473 add_target (&remote_ops
);
5475 init_extended_remote_ops ();
5476 add_target (&extended_remote_ops
);
5478 init_remote_async_ops ();
5479 add_target (&remote_async_ops
);
5481 init_extended_async_remote_ops ();
5482 add_target (&extended_async_remote_ops
);
5484 /* Hook into new objfile notification. */
5485 remote_new_objfile_chain
= deprecated_target_new_objfile_hook
;
5486 deprecated_target_new_objfile_hook
= remote_new_objfile
;
5489 init_remote_threadtests ();
5492 /* set/show remote ... */
5494 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, "\
5495 Remote protocol specific variables\n\
5496 Configure various remote-protocol specific variables such as\n\
5497 the packets being used",
5498 &remote_set_cmdlist
, "set remote ",
5499 0/*allow-unknown*/, &setlist
);
5500 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, "\
5501 Remote protocol specific variables\n\
5502 Configure various remote-protocol specific variables such as\n\
5503 the packets being used",
5504 &remote_show_cmdlist
, "show remote ",
5505 0/*allow-unknown*/, &showlist
);
5507 add_cmd ("compare-sections", class_obscure
, compare_sections_command
,
5508 "Compare section data on target to the exec file.\n\
5509 Argument is a single section name (default: all loaded sections).",
5512 add_cmd ("packet", class_maintenance
, packet_command
,
5513 "Send an arbitrary packet to a remote target.\n\
5514 maintenance packet TEXT\n\
5515 If GDB is talking to an inferior via the GDB serial protocol, then\n\
5516 this command sends the string TEXT to the inferior, and displays the\n\
5517 response packet. GDB supplies the initial `$' character, and the\n\
5518 terminating `#' character and checksum.",
5521 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
,
5522 "Set whether to send break if interrupted.\n",
5523 "Show whether to send break if interrupted.\n",
5525 &setlist
, &showlist
);
5527 /* Install commands for configuring memory read/write packets. */
5529 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
,
5530 "Set the maximum number of bytes per memory write packet (deprecated).\n",
5532 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
,
5533 "Show the maximum number of bytes per memory write packet (deprecated).\n",
5535 add_cmd ("memory-write-packet-size", no_class
,
5536 set_memory_write_packet_size
,
5537 "Set the maximum number of bytes per memory-write packet.\n"
5538 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5539 "default packet size. The actual limit is further reduced\n"
5540 "dependent on the target. Specify ``fixed'' to disable the\n"
5541 "further restriction and ``limit'' to enable that restriction\n",
5542 &remote_set_cmdlist
);
5543 add_cmd ("memory-read-packet-size", no_class
,
5544 set_memory_read_packet_size
,
5545 "Set the maximum number of bytes per memory-read packet.\n"
5546 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5547 "default packet size. The actual limit is further reduced\n"
5548 "dependent on the target. Specify ``fixed'' to disable the\n"
5549 "further restriction and ``limit'' to enable that restriction\n",
5550 &remote_set_cmdlist
);
5551 add_cmd ("memory-write-packet-size", no_class
,
5552 show_memory_write_packet_size
,
5553 "Show the maximum number of bytes per memory-write packet.\n",
5554 &remote_show_cmdlist
);
5555 add_cmd ("memory-read-packet-size", no_class
,
5556 show_memory_read_packet_size
,
5557 "Show the maximum number of bytes per memory-read packet.\n",
5558 &remote_show_cmdlist
);
5560 add_setshow_cmd ("hardware-watchpoint-limit", no_class
,
5561 var_zinteger
, &remote_hw_watchpoint_limit
, "\
5562 Set the maximum number of target hardware watchpoints.\n\
5563 Specify a negative limit for unlimited.", "\
5564 Show the maximum number of target hardware watchpoints.\n",
5565 NULL
, NULL
, &remote_set_cmdlist
, &remote_show_cmdlist
);
5566 add_setshow_cmd ("hardware-breakpoint-limit", no_class
,
5567 var_zinteger
, &remote_hw_breakpoint_limit
, "\
5568 Set the maximum number of target hardware breakpoints.\n\
5569 Specify a negative limit for unlimited.", "\
5570 Show the maximum number of target hardware breakpoints.\n",
5571 NULL
, NULL
, &remote_set_cmdlist
, &remote_show_cmdlist
);
5574 (add_set_cmd ("remoteaddresssize", class_obscure
,
5575 var_integer
, (char *) &remote_address_size
,
5576 "Set the maximum size of the address (in bits) \
5577 in a memory packet.\n",
5581 add_packet_config_cmd (&remote_protocol_binary_download
,
5582 "X", "binary-download",
5583 set_remote_protocol_binary_download_cmd
,
5584 show_remote_protocol_binary_download_cmd
,
5585 &remote_set_cmdlist
, &remote_show_cmdlist
,
5588 /* XXXX - should ``set remotebinarydownload'' be retained for
5591 (add_set_cmd ("remotebinarydownload", no_class
,
5592 var_boolean
, (char *) &remote_binary_download
,
5593 "Set binary downloads.\n", &setlist
),
5597 add_packet_config_cmd (&remote_protocol_vcont
,
5598 "vCont", "verbose-resume",
5599 set_remote_protocol_vcont_packet_cmd
,
5600 show_remote_protocol_vcont_packet_cmd
,
5601 &remote_set_cmdlist
, &remote_show_cmdlist
,
5604 add_packet_config_cmd (&remote_protocol_qSymbol
,
5605 "qSymbol", "symbol-lookup",
5606 set_remote_protocol_qSymbol_packet_cmd
,
5607 show_remote_protocol_qSymbol_packet_cmd
,
5608 &remote_set_cmdlist
, &remote_show_cmdlist
,
5611 add_packet_config_cmd (&remote_protocol_e
,
5612 "e", "step-over-range",
5613 set_remote_protocol_e_packet_cmd
,
5614 show_remote_protocol_e_packet_cmd
,
5615 &remote_set_cmdlist
, &remote_show_cmdlist
,
5617 /* Disable by default. The ``e'' packet has nasty interactions with
5618 the threading code - it relies on global state. */
5619 remote_protocol_e
.detect
= AUTO_BOOLEAN_FALSE
;
5620 update_packet_config (&remote_protocol_e
);
5622 add_packet_config_cmd (&remote_protocol_E
,
5623 "E", "step-over-range-w-signal",
5624 set_remote_protocol_E_packet_cmd
,
5625 show_remote_protocol_E_packet_cmd
,
5626 &remote_set_cmdlist
, &remote_show_cmdlist
,
5628 /* Disable by default. The ``e'' packet has nasty interactions with
5629 the threading code - it relies on global state. */
5630 remote_protocol_E
.detect
= AUTO_BOOLEAN_FALSE
;
5631 update_packet_config (&remote_protocol_E
);
5633 add_packet_config_cmd (&remote_protocol_P
,
5634 "P", "set-register",
5635 set_remote_protocol_P_packet_cmd
,
5636 show_remote_protocol_P_packet_cmd
,
5637 &remote_set_cmdlist
, &remote_show_cmdlist
,
5640 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
],
5641 "Z0", "software-breakpoint",
5642 set_remote_protocol_Z_software_bp_packet_cmd
,
5643 show_remote_protocol_Z_software_bp_packet_cmd
,
5644 &remote_set_cmdlist
, &remote_show_cmdlist
,
5647 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
],
5648 "Z1", "hardware-breakpoint",
5649 set_remote_protocol_Z_hardware_bp_packet_cmd
,
5650 show_remote_protocol_Z_hardware_bp_packet_cmd
,
5651 &remote_set_cmdlist
, &remote_show_cmdlist
,
5654 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_WRITE_WP
],
5655 "Z2", "write-watchpoint",
5656 set_remote_protocol_Z_write_wp_packet_cmd
,
5657 show_remote_protocol_Z_write_wp_packet_cmd
,
5658 &remote_set_cmdlist
, &remote_show_cmdlist
,
5661 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_READ_WP
],
5662 "Z3", "read-watchpoint",
5663 set_remote_protocol_Z_read_wp_packet_cmd
,
5664 show_remote_protocol_Z_read_wp_packet_cmd
,
5665 &remote_set_cmdlist
, &remote_show_cmdlist
,
5668 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
],
5669 "Z4", "access-watchpoint",
5670 set_remote_protocol_Z_access_wp_packet_cmd
,
5671 show_remote_protocol_Z_access_wp_packet_cmd
,
5672 &remote_set_cmdlist
, &remote_show_cmdlist
,
5675 add_packet_config_cmd (&remote_protocol_qPart_auxv
,
5676 "qPart_auxv", "read-aux-vector",
5677 set_remote_protocol_qPart_auxv_packet_cmd
,
5678 show_remote_protocol_qPart_auxv_packet_cmd
,
5679 &remote_set_cmdlist
, &remote_show_cmdlist
,
5682 /* Keep the old ``set remote Z-packet ...'' working. */
5683 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
5684 &remote_Z_packet_detect
, "\
5685 Set use of remote protocol `Z' packets",
5686 "Show use of remote protocol `Z' packets ",
5687 set_remote_protocol_Z_packet_cmd
,
5688 show_remote_protocol_Z_packet_cmd
,
5689 &remote_set_cmdlist
, &remote_show_cmdlist
);
5691 /* Eventually initialize fileio. See fileio.c */
5692 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);