1 /* Remote target communications for serial-line targets in custom GDB protocol
2 Copyright 1988, 1991-2000 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* See the GDB User Guide for details of the GDB remote protocol. */
24 #include "gdb_string.h"
33 /*#include "terminal.h" */
36 #include "gdb-stabs.h"
37 #include "gdbthread.h"
45 #include <sys/types.h>
48 #include "event-loop.h"
49 #include "event-top.h"
55 /* Prototypes for local functions */
56 static void cleanup_sigint_signal_handler (void *dummy
);
57 static void initialize_sigint_signal_handler (void);
58 static int getpkt_sane (char *buf
, long sizeof_buf
, int forever
);
60 static void handle_remote_sigint (int);
61 static void handle_remote_sigint_twice (int);
62 static void async_remote_interrupt (gdb_client_data
);
63 void async_remote_interrupt_twice (gdb_client_data
);
65 static void build_remote_gdbarch_data (void);
67 static int remote_write_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
);
69 static int remote_read_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
);
71 static void remote_files_info (struct target_ops
*ignore
);
73 static int remote_xfer_memory (CORE_ADDR memaddr
, char *myaddr
,
74 int len
, int should_write
,
75 struct target_ops
*target
);
77 static void remote_prepare_to_store (void);
79 static void remote_fetch_registers (int regno
);
81 static void remote_resume (int pid
, int step
, enum target_signal siggnal
);
82 static void remote_async_resume (int pid
, int step
,
83 enum target_signal siggnal
);
84 static int remote_start_remote (PTR
);
86 static void remote_open (char *name
, int from_tty
);
87 static void remote_async_open (char *name
, int from_tty
);
89 static void extended_remote_open (char *name
, int from_tty
);
90 static void extended_remote_async_open (char *name
, int from_tty
);
92 static void remote_open_1 (char *, int, struct target_ops
*, int extended_p
);
93 static void remote_async_open_1 (char *, int, struct target_ops
*,
96 static void remote_close (int quitting
);
98 static void remote_store_registers (int regno
);
100 static void remote_mourn (void);
101 static void remote_async_mourn (void);
103 static void extended_remote_restart (void);
105 static void extended_remote_mourn (void);
107 static void extended_remote_create_inferior (char *, char *, char **);
108 static void extended_remote_async_create_inferior (char *, char *, char **);
110 static void remote_mourn_1 (struct target_ops
*);
112 static void remote_send (char *buf
, long sizeof_buf
);
114 static int readchar (int timeout
);
116 static int remote_wait (int pid
, struct target_waitstatus
*status
);
117 static int remote_async_wait (int pid
, struct target_waitstatus
*status
);
119 static void remote_kill (void);
120 static void remote_async_kill (void);
122 static int tohex (int nib
);
124 static void remote_detach (char *args
, int from_tty
);
125 static void remote_async_detach (char *args
, int from_tty
);
127 static void remote_interrupt (int signo
);
129 static void remote_interrupt_twice (int signo
);
131 static void interrupt_query (void);
133 static void set_thread (int, int);
135 static int remote_thread_alive (int);
137 static void get_offsets (void);
139 static long read_frame (char *buf
, long sizeof_buf
);
141 static int remote_insert_breakpoint (CORE_ADDR
, char *);
143 static int remote_remove_breakpoint (CORE_ADDR
, char *);
145 static int hexnumlen (ULONGEST num
);
147 static void init_remote_ops (void);
149 static void init_extended_remote_ops (void);
151 static void init_remote_cisco_ops (void);
153 static struct target_ops remote_cisco_ops
;
155 static void remote_stop (void);
157 static int ishex (int ch
, int *val
);
159 static int stubhex (int ch
);
161 static int remote_query (int /*char */ , char *, char *, int *);
163 static int hexnumstr (char *, ULONGEST
);
165 static int hexnumnstr (char *, ULONGEST
, int);
167 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
169 static void print_packet (char *);
171 static unsigned long crc32 (unsigned char *, int, unsigned int);
173 static void compare_sections_command (char *, int);
175 static void packet_command (char *, int);
177 static int stub_unpack_int (char *buff
, int fieldlength
);
179 static int remote_current_thread (int oldpid
);
181 static void remote_find_new_threads (void);
183 static void record_currthread (int currthread
);
185 /* exported functions */
187 extern int fromhex (int a
);
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 /* Define the target subroutine names */
201 void open_remote_target (char *, int, struct target_ops
*, int);
203 void _initialize_remote (void);
207 static struct target_ops remote_ops
;
209 static struct target_ops extended_remote_ops
;
211 /* Temporary target ops. Just like the remote_ops and
212 extended_remote_ops, but with asynchronous support. */
213 static struct target_ops remote_async_ops
;
215 static struct target_ops extended_async_remote_ops
;
217 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
218 ``forever'' still use the normal timeout mechanism. This is
219 currently used by the ASYNC code to guarentee that target reads
220 during the initial connect always time-out. Once getpkt has been
221 modified to return a timeout indication and, in turn
222 remote_wait()/wait_for_inferior() have gained a timeout parameter
224 static int wait_forever_enabled_p
= 1;
227 /* This variable chooses whether to send a ^C or a break when the user
228 requests program interruption. Although ^C is usually what remote
229 systems expect, and that is the default here, sometimes a break is
230 preferable instead. */
232 static int remote_break
;
234 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
235 remote_open knows that we don't have a file open when the program
237 static serial_t remote_desc
= NULL
;
239 /* This is set by the target (thru the 'S' message)
240 to denote that the target is in kernel mode. */
241 static int cisco_kernel_mode
= 0;
243 /* This variable sets the number of bits in an address that are to be
244 sent in a memory ("M" or "m") packet. Normally, after stripping
245 leading zeros, the entire address would be sent. This variable
246 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
247 initial implementation of remote.c restricted the address sent in
248 memory packets to ``host::sizeof long'' bytes - (typically 32
249 bits). Consequently, for 64 bit targets, the upper 32 bits of an
250 address was never sent. Since fixing this bug may cause a break in
251 some remote targets this variable is principly provided to
252 facilitate backward compatibility. */
254 static int remote_address_size
;
256 /* Tempoary to track who currently owns the terminal. See
257 target_async_terminal_* for more details. */
259 static int remote_async_terminal_ours_p
;
262 /* This is the size (in chars) of the first response to the ``g''
263 packet. It is used as a heuristic when determining the maximum
264 size of memory-read and memory-write packets. A target will
265 typically only reserve a buffer large enough to hold the ``g''
266 packet. The size does not include packet overhead (headers and
269 static long actual_register_packet_size
;
271 /* This is the maximum size (in chars) of a non read/write packet. It
272 is also used as a cap on the size of read/write packets. */
274 static long remote_packet_size
;
276 #define PBUFSIZ (remote_packet_size)
278 /* User configurable variables for the number of characters in a
279 memory read/write packet. MIN (PBUFSIZ, g-packet-size) is the
280 default. Some targets need smaller values (fifo overruns, et.al.)
281 and some users need larger values (speed up transfers). The
282 variables ``preferred_*'' (the user request), ``current_*'' (what
283 was actually set) and ``forced_*'' (Positive - a soft limit,
284 negative - a hard limit). */
286 struct memory_packet_config
293 /* Compute the current size of a read/write packet. Since this makes
294 use of ``actual_register_packet_size'' the computation is dynamic. */
297 get_memory_packet_size (struct memory_packet_config
*config
)
299 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
300 law?) that some hosts don't cope very well with large alloca()
301 calls. Eventually the alloca() code will be replaced by calls to
302 xmalloc() and make_cleanups() allowing this restriction to either
303 be lifted or removed. */
304 #ifndef MAX_REMOTE_PACKET_SIZE
305 #define MAX_REMOTE_PACKET_SIZE 16384
307 /* NOTE: 16 is just chosen at random. */
308 #ifndef MIN_REMOTE_PACKET_SIZE
309 #define MIN_REMOTE_PACKET_SIZE 16
314 if (config
->size
<= 0)
315 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
317 what_they_get
= config
->size
;
321 what_they_get
= remote_packet_size
;
322 /* Limit the packet to the size specified by the user. */
324 && what_they_get
> config
->size
)
325 what_they_get
= config
->size
;
326 /* Limit it to the size of the targets ``g'' response. */
327 if (actual_register_packet_size
> 0
328 && what_they_get
> actual_register_packet_size
)
329 what_they_get
= actual_register_packet_size
;
331 if (what_they_get
> MAX_REMOTE_PACKET_SIZE
)
332 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
333 if (what_they_get
< MIN_REMOTE_PACKET_SIZE
)
334 what_they_get
= MIN_REMOTE_PACKET_SIZE
;
335 return what_they_get
;
338 /* Update the size of a read/write packet. If they user wants
339 something really big then do a sanity check. */
342 set_memory_packet_size (char *args
, struct memory_packet_config
*config
)
344 int fixed_p
= config
->fixed_p
;
345 long size
= config
->size
;
347 error ("Argument required (integer, `fixed' or `limited').");
348 else if (strcmp (args
, "hard") == 0
349 || strcmp (args
, "fixed") == 0)
351 else if (strcmp (args
, "soft") == 0
352 || strcmp (args
, "limit") == 0)
357 size
= strtoul (args
, &end
, 0);
359 error ("Invalid %s (bad syntax).", config
->name
);
361 /* Instead of explicitly capping the size of a packet to
362 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
363 instead allowed to set the size to something arbitrarily
365 if (size
> MAX_REMOTE_PACKET_SIZE
)
366 error ("Invalid %s (too large).", config
->name
);
370 if (fixed_p
&& !config
->fixed_p
)
372 if (! query ("The target may not be able to correctly handle a %s\n"
373 "of %ld bytes. Change the packet size? ",
375 error ("Packet size not changed.");
377 /* Update the config. */
378 config
->fixed_p
= fixed_p
;
383 show_memory_packet_size (struct memory_packet_config
*config
)
385 printf_filtered ("The %s is %ld. ", config
->name
, config
->size
);
387 printf_filtered ("Packets are fixed at %ld bytes.\n",
388 get_memory_packet_size (config
));
390 printf_filtered ("Packets are limited to %ld bytes.\n",
391 get_memory_packet_size (config
));
394 static struct memory_packet_config memory_write_packet_config
=
396 "memory-write-packet-size",
400 set_memory_write_packet_size (char *args
, int from_tty
)
402 set_memory_packet_size (args
, &memory_write_packet_config
);
406 show_memory_write_packet_size (char *args
, int from_tty
)
408 show_memory_packet_size (&memory_write_packet_config
);
412 get_memory_write_packet_size (void)
414 return get_memory_packet_size (&memory_write_packet_config
);
417 static struct memory_packet_config memory_read_packet_config
=
419 "memory-read-packet-size",
423 set_memory_read_packet_size (char *args
, int from_tty
)
425 set_memory_packet_size (args
, &memory_read_packet_config
);
429 show_memory_read_packet_size (char *args
, int from_tty
)
431 show_memory_packet_size (&memory_read_packet_config
);
435 get_memory_read_packet_size (void)
437 long size
= get_memory_packet_size (&memory_read_packet_config
);
438 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
439 extra buffer size argument before the memory read size can be
440 increased beyond PBUFSIZ. */
446 /* Register packet size initialization. Since the bounds change when
447 the architecture changes (namely REGISTER_BYTES) this all needs to
451 register_remote_packet_sizes (void)
453 REGISTER_GDBARCH_SWAP (remote_packet_size
);
454 REGISTER_GDBARCH_SWAP (actual_register_packet_size
);
458 build_remote_packet_sizes (void)
460 /* Default maximum number of characters in a packet body. Many
461 remote stubs have a hardwired buffer size of 400 bytes
462 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
463 as the maximum packet-size to ensure that the packet and an extra
464 NUL character can always fit in the buffer. This stops GDB
465 trashing stubs that try to squeeze an extra NUL into what is
466 already a full buffer (As of 1999-12-04 that was most stubs. */
467 remote_packet_size
= 400 - 1;
468 /* Should REGISTER_BYTES needs more space than the default, adjust
469 the size accordingly. Remember that each byte is encoded as two
470 characters. 32 is the overhead for the packet header /
471 footer. NOTE: cagney/1999-10-26: I suspect that 8
472 (``$NN:G...#NN'') is a better guess, the below has been padded a
474 if (REGISTER_BYTES
> ((remote_packet_size
- 32) / 2))
475 remote_packet_size
= (REGISTER_BYTES
* 2 + 32);
477 /* This one is filled in when a ``g'' packet is received. */
478 actual_register_packet_size
= 0;
481 /* Generic configuration support for packets the stub optionally
482 supports. Allows the user to specify the use of the packet as well
483 as allowing GDB to auto-detect support in the remote stub. */
487 PACKET_SUPPORT_UNKNOWN
= 0,
496 enum cmd_auto_boolean detect
;
497 enum packet_support support
;
500 /* Analyze a packet's return value and update the packet config
511 update_packet_config (struct packet_config
*config
)
513 switch (config
->detect
)
515 case CMD_AUTO_BOOLEAN_TRUE
:
516 config
->support
= PACKET_ENABLE
;
518 case CMD_AUTO_BOOLEAN_FALSE
:
519 config
->support
= PACKET_DISABLE
;
521 case CMD_AUTO_BOOLEAN_AUTO
:
522 config
->support
= PACKET_SUPPORT_UNKNOWN
;
528 show_packet_config_cmd (struct packet_config
*config
)
530 char *support
= "internal-error";
531 switch (config
->support
)
537 support
= "disabled";
539 case PACKET_SUPPORT_UNKNOWN
:
543 switch (config
->detect
)
545 case CMD_AUTO_BOOLEAN_AUTO
:
546 printf_filtered ("Support for remote protocol `%s' (%s) packet is auto-detected, currently %s.\n",
547 config
->name
, config
->title
, support
);
549 case CMD_AUTO_BOOLEAN_TRUE
:
550 case CMD_AUTO_BOOLEAN_FALSE
:
551 printf_filtered ("Support for remote protocol `%s' (%s) packet is currently %s.\n",
552 config
->name
, config
->title
, support
);
558 add_packet_config_cmd (struct packet_config
*config
,
561 void (*set_func
) (char *args
, int from_tty
,
562 struct cmd_list_element
*
564 void (*show_func
) (char *name
,
566 struct cmd_list_element
**set_remote_list
,
567 struct cmd_list_element
**show_remote_list
,
570 struct cmd_list_element
*set_cmd
;
571 struct cmd_list_element
*show_cmd
;
576 config
->title
= title
;
577 config
->detect
= CMD_AUTO_BOOLEAN_AUTO
;
578 config
->support
= PACKET_SUPPORT_UNKNOWN
;
579 asprintf (&set_doc
, "Set use of remote protocol `%s' (%s) packet",
581 asprintf (&show_doc
, "Show current use of remote protocol `%s' (%s) packet",
583 /* set/show TITLE-packet {auto,on,off} */
584 asprintf (&cmd_name
, "%s-packet", title
);
585 set_cmd
= add_set_auto_boolean_cmd (cmd_name
, class_obscure
,
586 &config
->detect
, set_doc
,
588 set_cmd
->function
.sfunc
= set_func
;
589 show_cmd
= add_cmd (cmd_name
, class_obscure
, show_func
, show_doc
,
591 /* set/show remote NAME-packet {auto,on,off} -- legacy */
595 asprintf (&legacy_name
, "%s-packet", name
);
596 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
598 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
603 static enum packet_result
604 packet_ok (const char *buf
, struct packet_config
*config
)
608 /* The stub recognized the packet request. Check that the
609 operation succeeded. */
610 switch (config
->support
)
612 case PACKET_SUPPORT_UNKNOWN
:
614 fprintf_unfiltered (gdb_stdlog
,
615 "Packet %s (%s) is supported\n",
616 config
->name
, config
->title
);
617 config
->support
= PACKET_ENABLE
;
620 internal_error ("packet_ok: attempt to use a disabled packet");
625 if (buf
[0] == 'O' && buf
[1] == 'K' && buf
[2] == '\0')
626 /* "OK" - definitly OK. */
629 && isxdigit (buf
[1]) && isxdigit (buf
[2])
631 /* "Enn" - definitly an error. */
633 /* The packet may or may not be OK. Just assume it is */
638 /* The stub does not support the packet. */
639 switch (config
->support
)
642 if (config
->detect
== CMD_AUTO_BOOLEAN_AUTO
)
643 /* If the stub previously indicated that the packet was
644 supported then there is a protocol error.. */
645 error ("Protocol error: %s (%s) conflicting enabled responses.",
646 config
->name
, config
->title
);
648 /* The user set it wrong. */
649 error ("Enabled packet %s (%s) not recognized by stub",
650 config
->name
, config
->title
);
652 case PACKET_SUPPORT_UNKNOWN
:
654 fprintf_unfiltered (gdb_stdlog
,
655 "Packet %s (%s) is NOT supported\n",
656 config
->name
, config
->title
);
657 config
->support
= PACKET_DISABLE
;
662 return PACKET_UNKNOWN
;
666 /* Should we try the 'P' (set register) request? */
668 static struct packet_config remote_protocol_P
;
671 set_remote_protocol_P_packet_cmd (char *args
, int from_tty
,
672 struct cmd_list_element
*c
)
674 update_packet_config (&remote_protocol_P
);
678 show_remote_protocol_P_packet_cmd (char *args
, int from_tty
)
680 show_packet_config_cmd (&remote_protocol_P
);
683 /* Should we try one of the 'Z' requests? */
687 Z_PACKET_SOFTWARE_BP
,
688 Z_PACKET_HARDWARE_BP
,
695 static struct packet_config remote_protocol_Z
[NR_Z_PACKET_TYPES
];
697 /* FIXME: Instead of having all these boiler plate functions, the
698 command callback should include a context argument. */
701 set_remote_protocol_Z_software_bp_packet_cmd (char *args
, int from_tty
,
702 struct cmd_list_element
*c
)
704 update_packet_config (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]);
708 show_remote_protocol_Z_software_bp_packet_cmd (char *args
, int from_tty
)
710 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]);
714 set_remote_protocol_Z_hardware_bp_packet_cmd (char *args
, int from_tty
,
715 struct cmd_list_element
*c
)
717 update_packet_config (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]);
721 show_remote_protocol_Z_hardware_bp_packet_cmd (char *args
, int from_tty
)
723 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]);
727 set_remote_protocol_Z_write_wp_packet_cmd (char *args
, int from_tty
,
728 struct cmd_list_element
*c
)
730 update_packet_config (&remote_protocol_Z
[Z_PACKET_WRITE_WP
]);
734 show_remote_protocol_Z_write_wp_packet_cmd (char *args
, int from_tty
)
736 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_WRITE_WP
]);
740 set_remote_protocol_Z_read_wp_packet_cmd (char *args
, int from_tty
,
741 struct cmd_list_element
*c
)
743 update_packet_config (&remote_protocol_Z
[Z_PACKET_READ_WP
]);
747 show_remote_protocol_Z_read_wp_packet_cmd (char *args
, int from_tty
)
749 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_READ_WP
]);
753 set_remote_protocol_Z_access_wp_packet_cmd (char *args
, int from_tty
,
754 struct cmd_list_element
*c
)
756 update_packet_config (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
]);
760 show_remote_protocol_Z_access_wp_packet_cmd (char *args
, int from_tty
)
762 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
]);
765 /* For compatibility with older distributions. Provide a ``set remote
766 Z-packet ...'' command that updates all the Z packet types. */
768 static enum cmd_auto_boolean remote_Z_packet_detect
;
771 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
772 struct cmd_list_element
*c
)
775 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
777 remote_protocol_Z
[i
].detect
= remote_Z_packet_detect
;
778 update_packet_config (&remote_protocol_Z
[i
]);
783 show_remote_protocol_Z_packet_cmd (char *args
, int from_tty
)
786 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
788 show_packet_config_cmd (&remote_protocol_Z
[i
]);
792 /* Should we try the 'X' (remote binary download) packet?
794 This variable (available to the user via "set remote X-packet")
795 dictates whether downloads are sent in binary (via the 'X' packet).
796 We assume that the stub can, and attempt to do it. This will be
797 cleared if the stub does not understand it. This switch is still
798 needed, though in cases when the packet is supported in the stub,
799 but the connection does not allow it (i.e., 7-bit serial connection
802 static struct packet_config remote_protocol_binary_download
;
804 /* Should we try the 'ThreadInfo' query packet?
806 This variable (NOT available to the user: auto-detect only!)
807 determines whether GDB will use the new, simpler "ThreadInfo"
808 query or the older, more complex syntax for thread queries.
809 This is an auto-detect variable (set to true at each connect,
810 and set to false when the target fails to recognize it). */
812 static int use_threadinfo_query
;
813 static int use_threadextra_query
;
816 set_remote_protocol_binary_download_cmd (char *args
,
818 struct cmd_list_element
*c
)
820 update_packet_config (&remote_protocol_binary_download
);
824 show_remote_protocol_binary_download_cmd (char *args
,
827 show_packet_config_cmd (&remote_protocol_binary_download
);
831 /* Tokens for use by the asynchronous signal handlers for SIGINT */
832 PTR sigint_remote_twice_token
;
833 PTR sigint_remote_token
;
835 /* These are pointers to hook functions that may be set in order to
836 modify resume/wait behavior for a particular architecture. */
838 void (*target_resume_hook
) (void);
839 void (*target_wait_loop_hook
) (void);
843 /* These are the threads which we last sent to the remote system.
844 -1 for all or -2 for not sent yet. */
845 static int general_thread
;
846 static int continue_thread
;
848 /* Call this function as a result of
849 1) A halt indication (T packet) containing a thread id
850 2) A direct query of currthread
851 3) Successful execution of set thread
855 record_currthread (int currthread
)
857 general_thread
= currthread
;
859 /* If this is a new thread, add it to GDB's thread list.
860 If we leave it up to WFI to do this, bad things will happen. */
861 if (!in_thread_list (currthread
))
863 add_thread (currthread
);
865 ui_out_text (uiout
, "[New ");
866 ui_out_text (uiout
, target_pid_to_str (currthread
));
867 ui_out_text (uiout
, "]\n");
869 printf_filtered ("[New %s]\n", target_pid_to_str (currthread
));
874 #define MAGIC_NULL_PID 42000
877 set_thread (int th
, int gen
)
879 char *buf
= alloca (PBUFSIZ
);
880 int state
= gen
? general_thread
: continue_thread
;
886 buf
[1] = gen
? 'g' : 'c';
887 if (th
== MAGIC_NULL_PID
)
893 sprintf (&buf
[2], "-%x", -th
);
895 sprintf (&buf
[2], "%x", th
);
897 getpkt (buf
, PBUFSIZ
, 0);
901 continue_thread
= th
;
904 /* Return nonzero if the thread TH is still alive on the remote system. */
907 remote_thread_alive (int tid
)
912 sprintf (buf
, "T-%08x", -tid
);
914 sprintf (buf
, "T%08x", tid
);
916 getpkt (buf
, sizeof (buf
), 0);
917 return (buf
[0] == 'O' && buf
[1] == 'K');
920 /* About these extended threadlist and threadinfo packets. They are
921 variable length packets but, the fields within them are often fixed
922 length. They are redundent enough to send over UDP as is the
923 remote protocol in general. There is a matching unit test module
926 #define OPAQUETHREADBYTES 8
928 /* a 64 bit opaque identifier */
929 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
931 /* WARNING: This threadref data structure comes from the remote O.S., libstub
932 protocol encoding, and remote.c. it is not particularly changable */
934 /* Right now, the internal structure is int. We want it to be bigger.
938 typedef int gdb_threadref
; /* internal GDB thread reference */
940 /* gdb_ext_thread_info is an internal GDB data structure which is
941 equivalint to the reply of the remote threadinfo packet */
943 struct gdb_ext_thread_info
945 threadref threadid
; /* External form of thread reference */
946 int active
; /* Has state interesting to GDB? , regs, stack */
947 char display
[256]; /* Brief state display, name, blocked/syspended */
948 char shortname
[32]; /* To be used to name threads */
949 char more_display
[256]; /* Long info, statistics, queue depth, whatever */
952 /* The volume of remote transfers can be limited by submitting
953 a mask containing bits specifying the desired information.
954 Use a union of these values as the 'selection' parameter to
955 get_thread_info. FIXME: Make these TAG names more thread specific.
958 #define TAG_THREADID 1
960 #define TAG_DISPLAY 4
961 #define TAG_THREADNAME 8
962 #define TAG_MOREDISPLAY 16
964 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES*2)
966 char *unpack_varlen_hex (char *buff
, int *result
);
968 static char *unpack_nibble (char *buf
, int *val
);
970 static char *pack_nibble (char *buf
, int nibble
);
972 static char *pack_hex_byte (char *pkt
, int /*unsigned char */ byte
);
974 static char *unpack_byte (char *buf
, int *value
);
976 static char *pack_int (char *buf
, int value
);
978 static char *unpack_int (char *buf
, int *value
);
980 static char *unpack_string (char *src
, char *dest
, int length
);
982 static char *pack_threadid (char *pkt
, threadref
* id
);
984 static char *unpack_threadid (char *inbuf
, threadref
* id
);
986 void int_to_threadref (threadref
* id
, int value
);
988 static int threadref_to_int (threadref
* ref
);
990 static void copy_threadref (threadref
* dest
, threadref
* src
);
992 static int threadmatch (threadref
* dest
, threadref
* src
);
994 static char *pack_threadinfo_request (char *pkt
, int mode
, threadref
* id
);
996 static int remote_unpack_thread_info_response (char *pkt
,
997 threadref
* expectedref
,
998 struct gdb_ext_thread_info
1002 static int remote_get_threadinfo (threadref
* threadid
, int fieldset
, /*TAG mask */
1003 struct gdb_ext_thread_info
*info
);
1005 static int adapt_remote_get_threadinfo (gdb_threadref
* ref
,
1007 struct gdb_ext_thread_info
*info
);
1009 static char *pack_threadlist_request (char *pkt
, int startflag
,
1011 threadref
* nextthread
);
1013 static int parse_threadlist_response (char *pkt
,
1015 threadref
* original_echo
,
1016 threadref
* resultlist
, int *doneflag
);
1018 static int remote_get_threadlist (int startflag
,
1019 threadref
* nextthread
,
1022 int *result_count
, threadref
* threadlist
);
1024 typedef int (*rmt_thread_action
) (threadref
* ref
, void *context
);
1026 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
1027 void *context
, int looplimit
);
1029 static int remote_newthread_step (threadref
* ref
, void *context
);
1031 /* encode 64 bits in 16 chars of hex */
1033 static const char hexchars
[] = "0123456789abcdef";
1036 ishex (int ch
, int *val
)
1038 if ((ch
>= 'a') && (ch
<= 'f'))
1040 *val
= ch
- 'a' + 10;
1043 if ((ch
>= 'A') && (ch
<= 'F'))
1045 *val
= ch
- 'A' + 10;
1048 if ((ch
>= '0') && (ch
<= '9'))
1059 if (ch
>= 'a' && ch
<= 'f')
1060 return ch
- 'a' + 10;
1061 if (ch
>= '0' && ch
<= '9')
1063 if (ch
>= 'A' && ch
<= 'F')
1064 return ch
- 'A' + 10;
1069 stub_unpack_int (char *buff
, int fieldlength
)
1076 nibble
= stubhex (*buff
++);
1080 retval
= retval
<< 4;
1086 unpack_varlen_hex (char *buff
, /* packet to parse */
1092 while (ishex (*buff
, &nibble
))
1095 retval
= retval
<< 4;
1096 retval
|= nibble
& 0x0f;
1103 unpack_nibble (char *buf
, int *val
)
1105 ishex (*buf
++, val
);
1110 pack_nibble (char *buf
, int nibble
)
1112 *buf
++ = hexchars
[(nibble
& 0x0f)];
1117 pack_hex_byte (char *pkt
, int byte
)
1119 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
1120 *pkt
++ = hexchars
[(byte
& 0xf)];
1125 unpack_byte (char *buf
, int *value
)
1127 *value
= stub_unpack_int (buf
, 2);
1132 pack_int (char *buf
, int value
)
1134 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
1135 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
1136 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
1137 buf
= pack_hex_byte (buf
, (value
& 0xff));
1142 unpack_int (char *buf
, int *value
)
1144 *value
= stub_unpack_int (buf
, 8);
1148 #if 0 /* currently unused, uncomment when needed */
1149 static char *pack_string (char *pkt
, char *string
);
1152 pack_string (char *pkt
, char *string
)
1157 len
= strlen (string
);
1159 len
= 200; /* Bigger than most GDB packets, junk??? */
1160 pkt
= pack_hex_byte (pkt
, len
);
1164 if ((ch
== '\0') || (ch
== '#'))
1165 ch
= '*'; /* Protect encapsulation */
1170 #endif /* 0 (unused) */
1173 unpack_string (char *src
, char *dest
, int length
)
1182 pack_threadid (char *pkt
, threadref
*id
)
1185 unsigned char *altid
;
1187 altid
= (unsigned char *) id
;
1188 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
1190 pkt
= pack_hex_byte (pkt
, *altid
++);
1196 unpack_threadid (char *inbuf
, threadref
*id
)
1199 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
1202 altref
= (char *) id
;
1204 while (inbuf
< limit
)
1206 x
= stubhex (*inbuf
++);
1207 y
= stubhex (*inbuf
++);
1208 *altref
++ = (x
<< 4) | y
;
1213 /* Externally, threadrefs are 64 bits but internally, they are still
1214 ints. This is due to a mismatch of specifications. We would like
1215 to use 64bit thread references internally. This is an adapter
1219 int_to_threadref (threadref
*id
, int value
)
1221 unsigned char *scan
;
1223 scan
= (unsigned char *) id
;
1229 *scan
++ = (value
>> 24) & 0xff;
1230 *scan
++ = (value
>> 16) & 0xff;
1231 *scan
++ = (value
>> 8) & 0xff;
1232 *scan
++ = (value
& 0xff);
1236 threadref_to_int (threadref
*ref
)
1239 unsigned char *scan
;
1241 scan
= (char *) ref
;
1245 value
= (value
<< 8) | ((*scan
++) & 0xff);
1250 copy_threadref (threadref
*dest
, threadref
*src
)
1253 unsigned char *csrc
, *cdest
;
1255 csrc
= (unsigned char *) src
;
1256 cdest
= (unsigned char *) dest
;
1263 threadmatch (threadref
*dest
, threadref
*src
)
1265 /* things are broken right now, so just assume we got a match */
1267 unsigned char *srcp
, *destp
;
1269 srcp
= (char *) src
;
1270 destp
= (char *) dest
;
1274 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
1281 threadid:1, # always request threadid
1288 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1291 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
1293 *pkt
++ = 'q'; /* Info Query */
1294 *pkt
++ = 'P'; /* process or thread info */
1295 pkt
= pack_int (pkt
, mode
); /* mode */
1296 pkt
= pack_threadid (pkt
, id
); /* threadid */
1297 *pkt
= '\0'; /* terminate */
1301 /* These values tag the fields in a thread info response packet */
1302 /* Tagging the fields allows us to request specific fields and to
1303 add more fields as time goes by */
1305 #define TAG_THREADID 1 /* Echo the thread identifier */
1306 #define TAG_EXISTS 2 /* Is this process defined enough to
1307 fetch registers and its stack */
1308 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1309 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is */
1310 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1314 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
1315 struct gdb_ext_thread_info
*info
)
1320 char *limit
= pkt
+ PBUFSIZ
; /* plausable parsing limit */
1323 /* info->threadid = 0; FIXME: implement zero_threadref */
1325 info
->display
[0] = '\0';
1326 info
->shortname
[0] = '\0';
1327 info
->more_display
[0] = '\0';
1329 /* Assume the characters indicating the packet type have been stripped */
1330 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
1331 pkt
= unpack_threadid (pkt
, &ref
);
1334 warning ("Incomplete response to threadinfo request\n");
1335 if (!threadmatch (&ref
, expectedref
))
1336 { /* This is an answer to a different request */
1337 warning ("ERROR RMT Thread info mismatch\n");
1340 copy_threadref (&info
->threadid
, &ref
);
1342 /* Loop on tagged fields , try to bail if somthing goes wrong */
1344 while ((pkt
< limit
) && mask
&& *pkt
) /* packets are terminated with nulls */
1346 pkt
= unpack_int (pkt
, &tag
); /* tag */
1347 pkt
= unpack_byte (pkt
, &length
); /* length */
1348 if (!(tag
& mask
)) /* tags out of synch with mask */
1350 warning ("ERROR RMT: threadinfo tag mismatch\n");
1354 if (tag
== TAG_THREADID
)
1358 warning ("ERROR RMT: length of threadid is not 16\n");
1362 pkt
= unpack_threadid (pkt
, &ref
);
1363 mask
= mask
& ~TAG_THREADID
;
1366 if (tag
== TAG_EXISTS
)
1368 info
->active
= stub_unpack_int (pkt
, length
);
1370 mask
= mask
& ~(TAG_EXISTS
);
1373 warning ("ERROR RMT: 'exists' length too long\n");
1379 if (tag
== TAG_THREADNAME
)
1381 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
1382 mask
= mask
& ~TAG_THREADNAME
;
1385 if (tag
== TAG_DISPLAY
)
1387 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
1388 mask
= mask
& ~TAG_DISPLAY
;
1391 if (tag
== TAG_MOREDISPLAY
)
1393 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
1394 mask
= mask
& ~TAG_MOREDISPLAY
;
1397 warning ("ERROR RMT: unknown thread info tag\n");
1398 break; /* Not a tag we know about */
1404 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
1405 struct gdb_ext_thread_info
*info
)
1408 char *threadinfo_pkt
= alloca (PBUFSIZ
);
1410 pack_threadinfo_request (threadinfo_pkt
, fieldset
, threadid
);
1411 putpkt (threadinfo_pkt
);
1412 getpkt (threadinfo_pkt
, PBUFSIZ
, 0);
1413 result
= remote_unpack_thread_info_response (threadinfo_pkt
+ 2, threadid
,
1418 /* Unfortunately, 61 bit thread-ids are bigger than the internal
1419 representation of a threadid. */
1422 adapt_remote_get_threadinfo (gdb_threadref
*ref
, int selection
,
1423 struct gdb_ext_thread_info
*info
)
1427 int_to_threadref (&lclref
, *ref
);
1428 return remote_get_threadinfo (&lclref
, selection
, info
);
1431 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1434 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
1435 threadref
*nextthread
)
1437 *pkt
++ = 'q'; /* info query packet */
1438 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
1439 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
1440 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
1441 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
1446 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1449 parse_threadlist_response (char *pkt
, int result_limit
,
1450 threadref
*original_echo
, threadref
*resultlist
,
1454 int count
, resultcount
, done
;
1457 /* Assume the 'q' and 'M chars have been stripped. */
1458 limit
= pkt
+ (PBUFSIZ
- BUF_THREAD_ID_SIZE
); /* done parse past here */
1459 pkt
= unpack_byte (pkt
, &count
); /* count field */
1460 pkt
= unpack_nibble (pkt
, &done
);
1461 /* The first threadid is the argument threadid. */
1462 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
1463 while ((count
-- > 0) && (pkt
< limit
))
1465 pkt
= unpack_threadid (pkt
, resultlist
++);
1466 if (resultcount
++ >= result_limit
)
1475 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
1476 int *done
, int *result_count
, threadref
*threadlist
)
1478 static threadref echo_nextthread
;
1479 char *threadlist_packet
= alloca (PBUFSIZ
);
1480 char *t_response
= alloca (PBUFSIZ
);
1483 /* Trancate result limit to be smaller than the packet size */
1484 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10) >= PBUFSIZ
)
1485 result_limit
= (PBUFSIZ
/ BUF_THREAD_ID_SIZE
) - 2;
1487 pack_threadlist_request (threadlist_packet
,
1488 startflag
, result_limit
, nextthread
);
1489 putpkt (threadlist_packet
);
1490 getpkt (t_response
, PBUFSIZ
, 0);
1493 parse_threadlist_response (t_response
+ 2, result_limit
, &echo_nextthread
,
1496 if (!threadmatch (&echo_nextthread
, nextthread
))
1498 /* FIXME: This is a good reason to drop the packet */
1499 /* Possably, there is a duplicate response */
1501 retransmit immediatly - race conditions
1502 retransmit after timeout - yes
1504 wait for packet, then exit
1506 warning ("HMM: threadlist did not echo arg thread, dropping it\n");
1507 return 0; /* I choose simply exiting */
1509 if (*result_count
<= 0)
1513 warning ("RMT ERROR : failed to get remote thread list\n");
1516 return result
; /* break; */
1518 if (*result_count
> result_limit
)
1521 warning ("RMT ERROR: threadlist response longer than requested\n");
1527 /* This is the interface between remote and threads, remotes upper interface */
1529 /* remote_find_new_threads retrieves the thread list and for each
1530 thread in the list, looks up the thread in GDB's internal list,
1531 ading the thread if it does not already exist. This involves
1532 getting partial thread lists from the remote target so, polling the
1533 quit_flag is required. */
1536 /* About this many threadisds fit in a packet. */
1538 #define MAXTHREADLISTRESULTS 32
1541 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
1544 int done
, i
, result_count
;
1548 static threadref nextthread
;
1549 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
1554 if (loopcount
++ > looplimit
)
1557 warning ("Remote fetch threadlist -infinite loop-\n");
1560 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
1561 &done
, &result_count
, resultthreadlist
))
1566 /* clear for later iterations */
1568 /* Setup to resume next batch of thread references, set nextthread. */
1569 if (result_count
>= 1)
1570 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
1572 while (result_count
--)
1573 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
1580 remote_newthread_step (threadref
*ref
, void *context
)
1584 pid
= threadref_to_int (ref
);
1585 if (!in_thread_list (pid
))
1587 return 1; /* continue iterator */
1590 #define CRAZY_MAX_THREADS 1000
1593 remote_current_thread (int oldpid
)
1595 char *buf
= alloca (PBUFSIZ
);
1598 getpkt (buf
, PBUFSIZ
, 0);
1599 if (buf
[0] == 'Q' && buf
[1] == 'C')
1600 return strtol (&buf
[2], NULL
, 16);
1605 /* Find new threads for info threads command.
1606 * Original version, using John Metzler's thread protocol.
1610 remote_find_new_threads (void)
1612 remote_threadlist_iterator (remote_newthread_step
, 0,
1614 if (inferior_pid
== MAGIC_NULL_PID
) /* ack ack ack */
1615 inferior_pid
= remote_current_thread (inferior_pid
);
1619 * Find all threads for info threads command.
1620 * Uses new thread protocol contributed by Cisco.
1621 * Falls back and attempts to use the older method (above)
1622 * if the target doesn't respond to the new method.
1626 remote_threads_info (void)
1628 char *buf
= alloca (PBUFSIZ
);
1632 if (remote_desc
== 0) /* paranoia */
1633 error ("Command can only be used when connected to the remote target.");
1635 if (use_threadinfo_query
)
1637 putpkt ("qfThreadInfo");
1639 getpkt (bufp
, PBUFSIZ
, 0);
1640 if (bufp
[0] != '\0') /* q packet recognized */
1642 while (*bufp
++ == 'm') /* reply contains one or more TID */
1646 tid
= strtol (bufp
, &bufp
, 16);
1647 if (tid
!= 0 && !in_thread_list (tid
))
1650 while (*bufp
++ == ','); /* comma-separated list */
1651 putpkt ("qsThreadInfo");
1653 getpkt (bufp
, PBUFSIZ
, 0);
1659 /* Else fall back to old method based on jmetzler protocol. */
1660 use_threadinfo_query
= 0;
1661 remote_find_new_threads ();
1666 * Collect a descriptive string about the given thread.
1667 * The target may say anything it wants to about the thread
1668 * (typically info about its blocked / runnable state, name, etc.).
1669 * This string will appear in the info threads display.
1671 * Optional: targets are not required to implement this function.
1675 remote_threads_extra_info (struct thread_info
*tp
)
1680 struct gdb_ext_thread_info threadinfo
;
1681 static char display_buf
[100]; /* arbitrary... */
1682 char *bufp
= alloca (PBUFSIZ
);
1683 int n
= 0; /* position in display_buf */
1685 if (remote_desc
== 0) /* paranoia */
1686 internal_error ("remote_threads_extra_info");
1688 if (use_threadextra_query
)
1690 sprintf (bufp
, "qThreadExtraInfo,%x", tp
->pid
);
1692 getpkt (bufp
, PBUFSIZ
, 0);
1697 for (p
= display_buf
;
1698 p
< display_buf
+ sizeof(display_buf
) - 1 &&
1703 *p
= fromhex (bufp
[0]) * 16 + fromhex (bufp
[1]);
1710 /* If the above query fails, fall back to the old method. */
1711 use_threadextra_query
= 0;
1712 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
1713 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
1714 int_to_threadref (&id
, tp
->pid
);
1715 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
1716 if (threadinfo
.active
)
1718 if (*threadinfo
.shortname
)
1719 n
+= sprintf(&display_buf
[0], " Name: %s,", threadinfo
.shortname
);
1720 if (*threadinfo
.display
)
1721 n
+= sprintf(&display_buf
[n
], " State: %s,", threadinfo
.display
);
1722 if (*threadinfo
.more_display
)
1723 n
+= sprintf(&display_buf
[n
], " Priority: %s",
1724 threadinfo
.more_display
);
1728 /* for purely cosmetic reasons, clear up trailing commas */
1729 if (',' == display_buf
[n
-1])
1730 display_buf
[n
-1] = ' ';
1739 /* Restart the remote side; this is an extended protocol operation. */
1742 extended_remote_restart (void)
1744 char *buf
= alloca (PBUFSIZ
);
1746 /* Send the restart command; for reasons I don't understand the
1747 remote side really expects a number after the "R". */
1749 sprintf (&buf
[1], "%x", 0);
1752 /* Now query for status so this looks just like we restarted
1753 gdbserver from scratch. */
1755 getpkt (buf
, PBUFSIZ
, 0);
1758 /* Clean up connection to a remote debugger. */
1762 remote_close (int quitting
)
1765 SERIAL_CLOSE (remote_desc
);
1769 /* Query the remote side for the text, data and bss offsets. */
1774 char *buf
= alloca (PBUFSIZ
);
1777 CORE_ADDR text_addr
, data_addr
, bss_addr
;
1778 struct section_offsets
*offs
;
1780 putpkt ("qOffsets");
1782 getpkt (buf
, PBUFSIZ
, 0);
1784 if (buf
[0] == '\000')
1785 return; /* Return silently. Stub doesn't support
1789 warning ("Remote failure reply: %s", buf
);
1793 /* Pick up each field in turn. This used to be done with scanf, but
1794 scanf will make trouble if CORE_ADDR size doesn't match
1795 conversion directives correctly. The following code will work
1796 with any size of CORE_ADDR. */
1797 text_addr
= data_addr
= bss_addr
= 0;
1801 if (strncmp (ptr
, "Text=", 5) == 0)
1804 /* Don't use strtol, could lose on big values. */
1805 while (*ptr
&& *ptr
!= ';')
1806 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
1811 if (!lose
&& strncmp (ptr
, ";Data=", 6) == 0)
1814 while (*ptr
&& *ptr
!= ';')
1815 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
1820 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
1823 while (*ptr
&& *ptr
!= ';')
1824 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
1830 error ("Malformed response to offset query, %s", buf
);
1832 if (symfile_objfile
== NULL
)
1835 offs
= (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
1836 memcpy (offs
, symfile_objfile
->section_offsets
, SIZEOF_SECTION_OFFSETS
);
1838 ANOFFSET (offs
, SECT_OFF_TEXT (symfile_objfile
)) = text_addr
;
1840 /* This is a temporary kludge to force data and bss to use the same offsets
1841 because that's what nlmconv does now. The real solution requires changes
1842 to the stub and remote.c that I don't have time to do right now. */
1844 ANOFFSET (offs
, SECT_OFF_DATA (symfile_objfile
)) = data_addr
;
1845 ANOFFSET (offs
, SECT_OFF_BSS (symfile_objfile
)) = data_addr
;
1847 objfile_relocate (symfile_objfile
, offs
);
1851 * Cisco version of section offsets:
1853 * Instead of having GDB query the target for the section offsets,
1854 * Cisco lets the target volunteer the information! It's also in
1855 * a different format, so here are the functions that will decode
1856 * a section offset packet from a Cisco target.
1860 * Function: remote_cisco_section_offsets
1862 * Returns: zero for success, non-zero for failure
1866 remote_cisco_section_offsets (bfd_vma text_addr
,
1869 bfd_signed_vma
*text_offs
,
1870 bfd_signed_vma
*data_offs
,
1871 bfd_signed_vma
*bss_offs
)
1873 bfd_vma text_base
, data_base
, bss_base
;
1874 struct minimal_symbol
*start
;
1880 if (symfile_objfile
== NULL
)
1881 return -1; /* no can do nothin' */
1883 start
= lookup_minimal_symbol ("_start", NULL
, NULL
);
1885 return -1; /* Can't find "_start" symbol */
1887 data_base
= bss_base
= 0;
1888 text_base
= SYMBOL_VALUE_ADDRESS (start
);
1890 abfd
= symfile_objfile
->obfd
;
1891 for (sect
= abfd
->sections
;
1895 p
= (unsigned char *) bfd_get_section_name (abfd
, sect
);
1897 if (strcmp (p
+ len
- 4, "data") == 0) /* ends in "data" */
1898 if (data_base
== 0 ||
1899 data_base
> bfd_get_section_vma (abfd
, sect
))
1900 data_base
= bfd_get_section_vma (abfd
, sect
);
1901 if (strcmp (p
+ len
- 3, "bss") == 0) /* ends in "bss" */
1902 if (bss_base
== 0 ||
1903 bss_base
> bfd_get_section_vma (abfd
, sect
))
1904 bss_base
= bfd_get_section_vma (abfd
, sect
);
1906 *text_offs
= text_addr
- text_base
;
1907 *data_offs
= data_addr
- data_base
;
1908 *bss_offs
= bss_addr
- bss_base
;
1913 sprintf (tmp
, "VMA: text = 0x");
1914 sprintf_vma (tmp
+ strlen (tmp
), text_addr
);
1915 sprintf (tmp
+ strlen (tmp
), " data = 0x");
1916 sprintf_vma (tmp
+ strlen (tmp
), data_addr
);
1917 sprintf (tmp
+ strlen (tmp
), " bss = 0x");
1918 sprintf_vma (tmp
+ strlen (tmp
), bss_addr
);
1919 fprintf_filtered (gdb_stdlog
, tmp
);
1920 fprintf_filtered (gdb_stdlog
,
1921 "Reloc offset: text = 0x%s data = 0x%s bss = 0x%s\n",
1922 paddr_nz (*text_offs
),
1923 paddr_nz (*data_offs
),
1924 paddr_nz (*bss_offs
));
1931 * Function: remote_cisco_objfile_relocate
1933 * Relocate the symbol file for a remote target.
1937 remote_cisco_objfile_relocate (bfd_signed_vma text_off
, bfd_signed_vma data_off
,
1938 bfd_signed_vma bss_off
)
1940 struct section_offsets
*offs
;
1942 if (text_off
!= 0 || data_off
!= 0 || bss_off
!= 0)
1944 /* FIXME: This code assumes gdb-stabs.h is being used; it's
1945 broken for xcoff, dwarf, sdb-coff, etc. But there is no
1946 simple canonical representation for this stuff. */
1948 offs
= (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
1949 memcpy (offs
, symfile_objfile
->section_offsets
, SIZEOF_SECTION_OFFSETS
);
1951 ANOFFSET (offs
, SECT_OFF_TEXT (symfile_objfile
)) = text_off
;
1952 ANOFFSET (offs
, SECT_OFF_DATA (symfile_objfile
)) = data_off
;
1953 ANOFFSET (offs
, SECT_OFF_BSS (symfile_objfile
)) = bss_off
;
1955 /* First call the standard objfile_relocate. */
1956 objfile_relocate (symfile_objfile
, offs
);
1958 /* Now we need to fix up the section entries already attached to
1959 the exec target. These entries will control memory transfers
1960 from the exec file. */
1962 exec_set_section_offsets (text_off
, data_off
, bss_off
);
1966 /* Stub for catch_errors. */
1969 remote_start_remote_dummy (void *dummy
)
1971 start_remote (); /* Initialize gdb process mechanisms */
1976 remote_start_remote (PTR dummy
)
1978 immediate_quit
= 1; /* Allow user to interrupt it */
1980 /* Ack any packet which the remote side has already sent. */
1981 SERIAL_WRITE (remote_desc
, "+", 1);
1983 /* Let the stub know that we want it to return the thread. */
1986 inferior_pid
= remote_current_thread (inferior_pid
);
1988 get_offsets (); /* Get text, data & bss offsets */
1990 putpkt ("?"); /* initiate a query from remote machine */
1993 return remote_start_remote_dummy (dummy
);
1996 /* Open a connection to a remote debugger.
1997 NAME is the filename used for communication. */
2000 remote_open (char *name
, int from_tty
)
2002 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
2005 /* Just like remote_open, but with asynchronous support. */
2007 remote_async_open (char *name
, int from_tty
)
2009 remote_async_open_1 (name
, from_tty
, &remote_async_ops
, 0);
2012 /* Open a connection to a remote debugger using the extended
2013 remote gdb protocol. NAME is the filename used for communication. */
2016 extended_remote_open (char *name
, int from_tty
)
2018 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */ );
2021 /* Just like extended_remote_open, but with asynchronous support. */
2023 extended_remote_async_open (char *name
, int from_tty
)
2025 remote_async_open_1 (name
, from_tty
, &extended_async_remote_ops
, 1 /*extended_p */ );
2028 /* Generic code for opening a connection to a remote target. */
2030 static DCACHE
*remote_dcache
;
2033 init_all_packet_configs (void)
2036 update_packet_config (&remote_protocol_P
);
2037 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2038 update_packet_config (&remote_protocol_Z
[i
]);
2039 /* Force remote_write_bytes to check whether target supports binary
2041 update_packet_config (&remote_protocol_binary_download
);
2045 remote_open_1 (char *name
, int from_tty
, struct target_ops
*target
,
2049 error ("To open a remote debug connection, you need to specify what\n\
2050 serial device is attached to the remote system\n\
2051 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
2053 /* See FIXME above */
2054 wait_forever_enabled_p
= 1;
2056 target_preopen (from_tty
);
2058 unpush_target (target
);
2060 remote_dcache
= dcache_init (remote_read_bytes
, remote_write_bytes
);
2062 remote_desc
= SERIAL_OPEN (name
);
2064 perror_with_name (name
);
2066 if (baud_rate
!= -1)
2068 if (SERIAL_SETBAUDRATE (remote_desc
, baud_rate
))
2070 SERIAL_CLOSE (remote_desc
);
2071 perror_with_name (name
);
2075 SERIAL_RAW (remote_desc
);
2077 /* If there is something sitting in the buffer we might take it as a
2078 response to a command, which would be bad. */
2079 SERIAL_FLUSH_INPUT (remote_desc
);
2083 puts_filtered ("Remote debugging using ");
2084 puts_filtered (name
);
2085 puts_filtered ("\n");
2087 push_target (target
); /* Switch to using remote target now */
2089 init_all_packet_configs ();
2091 general_thread
= -2;
2092 continue_thread
= -2;
2094 /* Probe for ability to use "ThreadInfo" query, as required. */
2095 use_threadinfo_query
= 1;
2096 use_threadextra_query
= 1;
2098 /* Without this, some commands which require an active target (such
2099 as kill) won't work. This variable serves (at least) double duty
2100 as both the pid of the target process (if it has such), and as a
2101 flag indicating that a target is active. These functions should
2102 be split out into seperate variables, especially since GDB will
2103 someday have a notion of debugging several processes. */
2105 inferior_pid
= MAGIC_NULL_PID
;
2106 /* Start the remote connection; if error (0), discard this target.
2107 In particular, if the user quits, be sure to discard it
2108 (we'd be in an inconsistent state otherwise). */
2109 if (!catch_errors (remote_start_remote
, NULL
,
2110 "Couldn't establish connection to remote target\n",
2119 /* tell the remote that we're using the extended protocol. */
2120 char *buf
= alloca (PBUFSIZ
);
2122 getpkt (buf
, PBUFSIZ
, 0);
2126 /* Just like remote_open but with asynchronous support. */
2128 remote_async_open_1 (char *name
, int from_tty
, struct target_ops
*target
,
2132 error ("To open a remote debug connection, you need to specify what\n\
2133 serial device is attached to the remote system\n\
2134 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
2136 target_preopen (from_tty
);
2138 unpush_target (target
);
2140 remote_dcache
= dcache_init (remote_read_bytes
, remote_write_bytes
);
2142 remote_desc
= SERIAL_OPEN (name
);
2144 perror_with_name (name
);
2146 if (baud_rate
!= -1)
2148 if (SERIAL_SETBAUDRATE (remote_desc
, baud_rate
))
2150 SERIAL_CLOSE (remote_desc
);
2151 perror_with_name (name
);
2155 SERIAL_RAW (remote_desc
);
2157 /* If there is something sitting in the buffer we might take it as a
2158 response to a command, which would be bad. */
2159 SERIAL_FLUSH_INPUT (remote_desc
);
2163 puts_filtered ("Remote debugging using ");
2164 puts_filtered (name
);
2165 puts_filtered ("\n");
2168 push_target (target
); /* Switch to using remote target now */
2170 init_all_packet_configs ();
2172 general_thread
= -2;
2173 continue_thread
= -2;
2175 /* Probe for ability to use "ThreadInfo" query, as required. */
2176 use_threadinfo_query
= 1;
2177 use_threadextra_query
= 1;
2179 /* Without this, some commands which require an active target (such
2180 as kill) won't work. This variable serves (at least) double duty
2181 as both the pid of the target process (if it has such), and as a
2182 flag indicating that a target is active. These functions should
2183 be split out into seperate variables, especially since GDB will
2184 someday have a notion of debugging several processes. */
2185 inferior_pid
= MAGIC_NULL_PID
;
2187 /* With this target we start out by owning the terminal. */
2188 remote_async_terminal_ours_p
= 1;
2190 /* FIXME: cagney/1999-09-23: During the initial connection it is
2191 assumed that the target is already ready and able to respond to
2192 requests. Unfortunatly remote_start_remote() eventually calls
2193 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2194 around this. Eventually a mechanism that allows
2195 wait_for_inferior() to expect/get timeouts will be
2197 wait_forever_enabled_p
= 0;
2199 /* Start the remote connection; if error (0), discard this target.
2200 In particular, if the user quits, be sure to discard it
2201 (we'd be in an inconsistent state otherwise). */
2202 if (!catch_errors (remote_start_remote
, NULL
,
2203 "Couldn't establish connection to remote target\n",
2207 wait_forever_enabled_p
= 1;
2211 wait_forever_enabled_p
= 1;
2215 /* tell the remote that we're using the extended protocol. */
2216 char *buf
= alloca (PBUFSIZ
);
2218 getpkt (buf
, PBUFSIZ
, 0);
2222 /* This takes a program previously attached to and detaches it. After
2223 this is done, GDB can be used to debug some other program. We
2224 better not have left any breakpoints in the target program or it'll
2225 die when it hits one. */
2228 remote_detach (char *args
, int from_tty
)
2230 char *buf
= alloca (PBUFSIZ
);
2233 error ("Argument given to \"detach\" when remotely debugging.");
2235 /* Tell the remote target to detach. */
2237 remote_send (buf
, PBUFSIZ
);
2239 target_mourn_inferior ();
2241 puts_filtered ("Ending remote debugging.\n");
2245 /* Same as remote_detach, but with async support. */
2247 remote_async_detach (char *args
, int from_tty
)
2249 char *buf
= alloca (PBUFSIZ
);
2252 error ("Argument given to \"detach\" when remotely debugging.");
2254 /* Tell the remote target to detach. */
2256 remote_send (buf
, PBUFSIZ
);
2258 /* Unregister the file descriptor from the event loop. */
2259 if (target_is_async_p ())
2260 SERIAL_ASYNC (remote_desc
, NULL
, 0);
2262 target_mourn_inferior ();
2264 puts_filtered ("Ending remote debugging.\n");
2267 /* Convert hex digit A to a number. */
2272 if (a
>= '0' && a
<= '9')
2274 else if (a
>= 'a' && a
<= 'f')
2275 return a
- 'a' + 10;
2276 else if (a
>= 'A' && a
<= 'F')
2277 return a
- 'A' + 10;
2279 error ("Reply contains invalid hex digit %d", a
);
2282 /* Convert number NIB to a hex digit. */
2290 return 'a' + nib
- 10;
2293 /* Tell the remote machine to resume. */
2295 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
2297 static int last_sent_step
;
2300 remote_resume (int pid
, int step
, enum target_signal siggnal
)
2302 char *buf
= alloca (PBUFSIZ
);
2305 set_thread (0, 0); /* run any thread */
2307 set_thread (pid
, 0); /* run this thread */
2309 dcache_flush (remote_dcache
);
2311 last_sent_signal
= siggnal
;
2312 last_sent_step
= step
;
2314 /* A hook for when we need to do something at the last moment before
2316 if (target_resume_hook
)
2317 (*target_resume_hook
) ();
2319 if (siggnal
!= TARGET_SIGNAL_0
)
2321 buf
[0] = step
? 'S' : 'C';
2322 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
2323 buf
[2] = tohex ((int) siggnal
& 0xf);
2327 strcpy (buf
, step
? "s" : "c");
2332 /* Same as remote_resume, but with async support. */
2334 remote_async_resume (int pid
, int step
, enum target_signal siggnal
)
2336 char *buf
= alloca (PBUFSIZ
);
2339 set_thread (0, 0); /* run any thread */
2341 set_thread (pid
, 0); /* run this thread */
2343 dcache_flush (remote_dcache
);
2345 last_sent_signal
= siggnal
;
2346 last_sent_step
= step
;
2348 /* A hook for when we need to do something at the last moment before
2350 if (target_resume_hook
)
2351 (*target_resume_hook
) ();
2353 if (siggnal
!= TARGET_SIGNAL_0
)
2355 buf
[0] = step
? 'S' : 'C';
2356 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
2357 buf
[2] = tohex ((int) siggnal
& 0xf);
2361 strcpy (buf
, step
? "s" : "c");
2363 /* We are about to start executing the inferior, let's register it
2364 with the event loop. NOTE: this is the one place where all the
2365 execution commands end up. We could alternatively do this in each
2366 of the execution commands in infcmd.c.*/
2367 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
2368 into infcmd.c in order to allow inferior function calls to work
2369 NOT asynchronously. */
2370 if (event_loop_p
&& target_can_async_p ())
2371 target_async (inferior_event_handler
, 0);
2372 /* Tell the world that the target is now executing. */
2373 /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set
2374 this? Instead, should the client of target just assume (for
2375 async targets) that the target is going to start executing? Is
2376 this information already found in the continuation block? */
2377 if (target_is_async_p ())
2378 target_executing
= 1;
2383 /* Set up the signal handler for SIGINT, while the target is
2384 executing, ovewriting the 'regular' SIGINT signal handler. */
2386 initialize_sigint_signal_handler (void)
2388 sigint_remote_token
=
2389 create_async_signal_handler (async_remote_interrupt
, NULL
);
2390 signal (SIGINT
, handle_remote_sigint
);
2393 /* Signal handler for SIGINT, while the target is executing. */
2395 handle_remote_sigint (int sig
)
2397 signal (sig
, handle_remote_sigint_twice
);
2398 sigint_remote_twice_token
=
2399 create_async_signal_handler (async_remote_interrupt_twice
, NULL
);
2400 mark_async_signal_handler_wrapper (sigint_remote_token
);
2403 /* Signal handler for SIGINT, installed after SIGINT has already been
2404 sent once. It will take effect the second time that the user sends
2407 handle_remote_sigint_twice (int sig
)
2409 signal (sig
, handle_sigint
);
2410 sigint_remote_twice_token
=
2411 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
2412 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
2415 /* Perform the real interruption of the target execution, in response
2418 async_remote_interrupt (gdb_client_data arg
)
2421 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2426 /* Perform interrupt, if the first attempt did not succeed. Just give
2427 up on the target alltogether. */
2429 async_remote_interrupt_twice (gdb_client_data arg
)
2432 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
2433 /* Do something only if the target was not killed by the previous
2435 if (target_executing
)
2438 signal (SIGINT
, handle_remote_sigint
);
2442 /* Reinstall the usual SIGINT handlers, after the target has
2445 cleanup_sigint_signal_handler (void *dummy
)
2447 signal (SIGINT
, handle_sigint
);
2448 if (sigint_remote_twice_token
)
2449 delete_async_signal_handler ((struct async_signal_handler
**) & sigint_remote_twice_token
);
2450 if (sigint_remote_token
)
2451 delete_async_signal_handler ((struct async_signal_handler
**) & sigint_remote_token
);
2454 /* Send ^C to target to halt it. Target will respond, and send us a
2456 static void (*ofunc
) (int);
2458 /* The command line interface's stop routine. This function is installed
2459 as a signal handler for SIGINT. The first time a user requests a
2460 stop, we call remote_stop to send a break or ^C. If there is no
2461 response from the target (it didn't stop when the user requested it),
2462 we ask the user if he'd like to detach from the target. */
2464 remote_interrupt (int signo
)
2466 /* If this doesn't work, try more severe steps. */
2467 signal (signo
, remote_interrupt_twice
);
2470 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2475 /* The user typed ^C twice. */
2478 remote_interrupt_twice (int signo
)
2480 signal (signo
, ofunc
);
2482 signal (signo
, remote_interrupt
);
2485 /* This is the generic stop called via the target vector. When a target
2486 interrupt is requested, either by the command line or the GUI, we
2487 will eventually end up here. */
2491 /* Send a break or a ^C, depending on user preference. */
2493 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
2496 SERIAL_SEND_BREAK (remote_desc
);
2498 SERIAL_WRITE (remote_desc
, "\003", 1);
2501 /* Ask the user what to do when an interrupt is received. */
2504 interrupt_query (void)
2506 target_terminal_ours ();
2508 if (query ("Interrupted while waiting for the program.\n\
2509 Give up (and stop debugging it)? "))
2511 target_mourn_inferior ();
2512 return_to_top_level (RETURN_QUIT
);
2515 target_terminal_inferior ();
2518 /* Enable/disable target terminal ownership. Most targets can use
2519 terminal groups to control terminal ownership. Remote targets are
2520 different in that explicit transfer of ownership to/from GDB/target
2524 remote_async_terminal_inferior (void)
2526 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
2527 sync_execution here. This function should only be called when
2528 GDB is resuming the inferior in the forground. A background
2529 resume (``run&'') should leave GDB in control of the terminal and
2530 consequently should not call this code. */
2531 if (!sync_execution
)
2533 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
2534 calls target_terminal_*() idenpotent. The event-loop GDB talking
2535 to an asynchronous target with a synchronous command calls this
2536 function from both event-top.c and infrun.c/infcmd.c. Once GDB
2537 stops trying to transfer the terminal to the target when it
2538 shouldn't this guard can go away. */
2539 if (!remote_async_terminal_ours_p
)
2541 delete_file_handler (input_fd
);
2542 remote_async_terminal_ours_p
= 0;
2543 initialize_sigint_signal_handler ();
2544 /* NOTE: At this point we could also register our selves as the
2545 recipient of all input. Any characters typed could then be
2546 passed on down to the target. */
2550 remote_async_terminal_ours (void)
2552 /* See FIXME in remote_async_terminal_inferior. */
2553 if (!sync_execution
)
2555 /* See FIXME in remote_async_terminal_inferior. */
2556 if (remote_async_terminal_ours_p
)
2558 cleanup_sigint_signal_handler (NULL
);
2559 add_file_handler (input_fd
, stdin_event_handler
, 0);
2560 remote_async_terminal_ours_p
= 1;
2563 /* If nonzero, ignore the next kill. */
2568 remote_console_output (char *msg
)
2572 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
2575 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
2578 fputs_unfiltered (tb
, gdb_stdtarg
);
2580 gdb_flush (gdb_stdtarg
);
2583 /* Wait until the remote machine stops, then return,
2584 storing status in STATUS just as `wait' would.
2585 Returns "pid", which in the case of a multi-threaded
2586 remote OS, is the thread-id. */
2589 remote_wait (int pid
, struct target_waitstatus
*status
)
2591 unsigned char *buf
= alloca (PBUFSIZ
);
2592 int thread_num
= -1;
2594 status
->kind
= TARGET_WAITKIND_EXITED
;
2595 status
->value
.integer
= 0;
2601 ofunc
= signal (SIGINT
, remote_interrupt
);
2602 getpkt (buf
, PBUFSIZ
, 1);
2603 signal (SIGINT
, ofunc
);
2605 /* This is a hook for when we need to do something (perhaps the
2606 collection of trace data) every time the target stops. */
2607 if (target_wait_loop_hook
)
2608 (*target_wait_loop_hook
) ();
2612 case 'E': /* Error of some sort */
2613 warning ("Remote failure reply: %s", buf
);
2615 case 'T': /* Status with PC, SP, FP, ... */
2619 char regs
[MAX_REGISTER_RAW_SIZE
];
2621 /* Expedited reply, containing Signal, {regno, reg} repeat */
2622 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
2624 n... = register number
2625 r... = register contents
2627 p
= &buf
[3]; /* after Txx */
2634 /* Read the register number */
2635 regno
= strtol ((const char *) p
, &p_temp
, 16);
2636 p1
= (unsigned char *) p_temp
;
2638 if (p1
== p
) /* No register number present here */
2640 p1
= (unsigned char *) strchr ((const char *) p
, ':');
2642 warning ("Malformed packet(a) (missing colon): %s\n\
2645 if (strncmp ((const char *) p
, "thread", p1
- p
) == 0)
2647 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
2648 record_currthread (thread_num
);
2649 p
= (unsigned char *) p_temp
;
2657 warning ("Malformed packet(b) (missing colon): %s\n\
2661 if (regno
>= NUM_REGS
)
2662 warning ("Remote sent bad register number %ld: %s\n\
2666 for (i
= 0; i
< REGISTER_RAW_SIZE (regno
); i
++)
2668 if (p
[0] == 0 || p
[1] == 0)
2669 warning ("Remote reply is too short: %s", buf
);
2670 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
2673 supply_register (regno
, regs
);
2678 warning ("Remote register badly formatted: %s", buf
);
2679 warning (" here: %s", p
);
2684 case 'S': /* Old style status, just signal only */
2685 status
->kind
= TARGET_WAITKIND_STOPPED
;
2686 status
->value
.sig
= (enum target_signal
)
2687 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2691 /* Export Cisco kernel mode as a convenience variable
2692 (so that it can be used in the GDB prompt if desired). */
2694 if (cisco_kernel_mode
== 1)
2695 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
2696 value_from_string ("PDEBUG-"));
2697 cisco_kernel_mode
= 0;
2698 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
2699 record_currthread (thread_num
);
2701 else if (buf
[3] == 'k')
2703 /* Export Cisco kernel mode as a convenience variable
2704 (so that it can be used in the GDB prompt if desired). */
2706 if (cisco_kernel_mode
== 1)
2707 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
2708 value_from_string ("KDEBUG-"));
2709 cisco_kernel_mode
= 1;
2712 case 'N': /* Cisco special: status and offsets */
2714 bfd_vma text_addr
, data_addr
, bss_addr
;
2715 bfd_signed_vma text_off
, data_off
, bss_off
;
2718 status
->kind
= TARGET_WAITKIND_STOPPED
;
2719 status
->value
.sig
= (enum target_signal
)
2720 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2722 if (symfile_objfile
== NULL
)
2724 warning ("Relocation packet received with no symbol file. \
2729 /* Relocate object file. Buffer format is NAATT;DD;BB
2730 * where AA is the signal number, TT is the new text
2731 * address, DD * is the new data address, and BB is the
2732 * new bss address. */
2735 text_addr
= strtoul (p
, (char **) &p1
, 16);
2736 if (p1
== p
|| *p1
!= ';')
2737 warning ("Malformed relocation packet: Packet '%s'", buf
);
2739 data_addr
= strtoul (p
, (char **) &p1
, 16);
2740 if (p1
== p
|| *p1
!= ';')
2741 warning ("Malformed relocation packet: Packet '%s'", buf
);
2743 bss_addr
= strtoul (p
, (char **) &p1
, 16);
2745 warning ("Malformed relocation packet: Packet '%s'", buf
);
2747 if (remote_cisco_section_offsets (text_addr
, data_addr
, bss_addr
,
2748 &text_off
, &data_off
, &bss_off
)
2750 if (text_off
!= 0 || data_off
!= 0 || bss_off
!= 0)
2751 remote_cisco_objfile_relocate (text_off
, data_off
, bss_off
);
2755 case 'W': /* Target exited */
2757 /* The remote process exited. */
2758 status
->kind
= TARGET_WAITKIND_EXITED
;
2759 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
2763 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
2764 status
->value
.sig
= (enum target_signal
)
2765 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2769 case 'O': /* Console output */
2770 remote_console_output (buf
+ 1);
2773 if (last_sent_signal
!= TARGET_SIGNAL_0
)
2775 /* Zero length reply means that we tried 'S' or 'C' and
2776 the remote system doesn't support it. */
2777 target_terminal_ours_for_output ();
2779 ("Can't send signals to this remote system. %s not sent.\n",
2780 target_signal_to_name (last_sent_signal
));
2781 last_sent_signal
= TARGET_SIGNAL_0
;
2782 target_terminal_inferior ();
2784 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
2785 putpkt ((char *) buf
);
2788 /* else fallthrough */
2790 warning ("Invalid remote reply: %s", buf
);
2795 if (thread_num
!= -1)
2799 return inferior_pid
;
2802 /* Async version of remote_wait. */
2804 remote_async_wait (int pid
, struct target_waitstatus
*status
)
2806 unsigned char *buf
= alloca (PBUFSIZ
);
2807 int thread_num
= -1;
2809 status
->kind
= TARGET_WAITKIND_EXITED
;
2810 status
->value
.integer
= 0;
2816 if (!target_is_async_p ())
2817 ofunc
= signal (SIGINT
, remote_interrupt
);
2818 /* FIXME: cagney/1999-09-27: If we're in async mode we should
2819 _never_ wait for ever -> test on target_is_async_p().
2820 However, before we do that we need to ensure that the caller
2821 knows how to take the target into/out of async mode. */
2822 getpkt (buf
, PBUFSIZ
, wait_forever_enabled_p
);
2823 if (!target_is_async_p ())
2824 signal (SIGINT
, ofunc
);
2826 /* This is a hook for when we need to do something (perhaps the
2827 collection of trace data) every time the target stops. */
2828 if (target_wait_loop_hook
)
2829 (*target_wait_loop_hook
) ();
2833 case 'E': /* Error of some sort */
2834 warning ("Remote failure reply: %s", buf
);
2836 case 'T': /* Status with PC, SP, FP, ... */
2840 char regs
[MAX_REGISTER_RAW_SIZE
];
2842 /* Expedited reply, containing Signal, {regno, reg} repeat */
2843 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
2845 n... = register number
2846 r... = register contents
2848 p
= &buf
[3]; /* after Txx */
2855 /* Read the register number */
2856 regno
= strtol ((const char *) p
, &p_temp
, 16);
2857 p1
= (unsigned char *) p_temp
;
2859 if (p1
== p
) /* No register number present here */
2861 p1
= (unsigned char *) strchr ((const char *) p
, ':');
2863 warning ("Malformed packet(a) (missing colon): %s\n\
2866 if (strncmp ((const char *) p
, "thread", p1
- p
) == 0)
2868 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
2869 record_currthread (thread_num
);
2870 p
= (unsigned char *) p_temp
;
2878 warning ("Malformed packet(b) (missing colon): %s\n\
2882 if (regno
>= NUM_REGS
)
2883 warning ("Remote sent bad register number %ld: %s\n\
2887 for (i
= 0; i
< REGISTER_RAW_SIZE (regno
); i
++)
2889 if (p
[0] == 0 || p
[1] == 0)
2890 warning ("Remote reply is too short: %s", buf
);
2891 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
2894 supply_register (regno
, regs
);
2899 warning ("Remote register badly formatted: %s", buf
);
2900 warning (" here: %s", p
);
2905 case 'S': /* Old style status, just signal only */
2906 status
->kind
= TARGET_WAITKIND_STOPPED
;
2907 status
->value
.sig
= (enum target_signal
)
2908 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2912 /* Export Cisco kernel mode as a convenience variable
2913 (so that it can be used in the GDB prompt if desired). */
2915 if (cisco_kernel_mode
== 1)
2916 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
2917 value_from_string ("PDEBUG-"));
2918 cisco_kernel_mode
= 0;
2919 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
2920 record_currthread (thread_num
);
2922 else if (buf
[3] == 'k')
2924 /* Export Cisco kernel mode as a convenience variable
2925 (so that it can be used in the GDB prompt if desired). */
2927 if (cisco_kernel_mode
== 1)
2928 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
2929 value_from_string ("KDEBUG-"));
2930 cisco_kernel_mode
= 1;
2933 case 'N': /* Cisco special: status and offsets */
2935 bfd_vma text_addr
, data_addr
, bss_addr
;
2936 bfd_signed_vma text_off
, data_off
, bss_off
;
2939 status
->kind
= TARGET_WAITKIND_STOPPED
;
2940 status
->value
.sig
= (enum target_signal
)
2941 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2943 if (symfile_objfile
== NULL
)
2945 warning ("Relocation packet recieved with no symbol file. \
2950 /* Relocate object file. Buffer format is NAATT;DD;BB
2951 * where AA is the signal number, TT is the new text
2952 * address, DD * is the new data address, and BB is the
2953 * new bss address. */
2956 text_addr
= strtoul (p
, (char **) &p1
, 16);
2957 if (p1
== p
|| *p1
!= ';')
2958 warning ("Malformed relocation packet: Packet '%s'", buf
);
2960 data_addr
= strtoul (p
, (char **) &p1
, 16);
2961 if (p1
== p
|| *p1
!= ';')
2962 warning ("Malformed relocation packet: Packet '%s'", buf
);
2964 bss_addr
= strtoul (p
, (char **) &p1
, 16);
2966 warning ("Malformed relocation packet: Packet '%s'", buf
);
2968 if (remote_cisco_section_offsets (text_addr
, data_addr
, bss_addr
,
2969 &text_off
, &data_off
, &bss_off
)
2971 if (text_off
!= 0 || data_off
!= 0 || bss_off
!= 0)
2972 remote_cisco_objfile_relocate (text_off
, data_off
, bss_off
);
2976 case 'W': /* Target exited */
2978 /* The remote process exited. */
2979 status
->kind
= TARGET_WAITKIND_EXITED
;
2980 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
2984 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
2985 status
->value
.sig
= (enum target_signal
)
2986 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2990 case 'O': /* Console output */
2991 remote_console_output (buf
+ 1);
2992 /* Return immediately to the event loop. The event loop will
2993 still be waiting on the inferior afterwards. */
2994 status
->kind
= TARGET_WAITKIND_IGNORE
;
2997 if (last_sent_signal
!= TARGET_SIGNAL_0
)
2999 /* Zero length reply means that we tried 'S' or 'C' and
3000 the remote system doesn't support it. */
3001 target_terminal_ours_for_output ();
3003 ("Can't send signals to this remote system. %s not sent.\n",
3004 target_signal_to_name (last_sent_signal
));
3005 last_sent_signal
= TARGET_SIGNAL_0
;
3006 target_terminal_inferior ();
3008 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
3009 putpkt ((char *) buf
);
3012 /* else fallthrough */
3014 warning ("Invalid remote reply: %s", buf
);
3019 if (thread_num
!= -1)
3023 return inferior_pid
;
3026 /* Number of bytes of registers this stub implements. */
3028 static int register_bytes_found
;
3030 /* Read the remote registers into the block REGS. */
3031 /* Currently we just read all the registers, so we don't use regno. */
3035 remote_fetch_registers (int regno
)
3037 char *buf
= alloca (PBUFSIZ
);
3040 char regs
[REGISTER_BYTES
];
3042 set_thread (inferior_pid
, 1);
3045 remote_send (buf
, PBUFSIZ
);
3047 /* Save the size of the packet sent to us by the target. Its used
3048 as a heuristic when determining the max size of packets that the
3049 target can safely receive. */
3050 if (actual_register_packet_size
== 0)
3051 actual_register_packet_size
= strlen (buf
);
3053 /* Unimplemented registers read as all bits zero. */
3054 memset (regs
, 0, REGISTER_BYTES
);
3056 /* We can get out of synch in various cases. If the first character
3057 in the buffer is not a hex character, assume that has happened
3058 and try to fetch another packet to read. */
3059 while ((buf
[0] < '0' || buf
[0] > '9')
3060 && (buf
[0] < 'a' || buf
[0] > 'f')
3061 && buf
[0] != 'x') /* New: unavailable register value */
3064 fprintf_unfiltered (gdb_stdlog
,
3065 "Bad register packet; fetching a new packet\n");
3066 getpkt (buf
, PBUFSIZ
, 0);
3069 /* Reply describes registers byte by byte, each byte encoded as two
3070 hex characters. Suck them all up, then supply them to the
3071 register cacheing/storage mechanism. */
3074 for (i
= 0; i
< REGISTER_BYTES
; i
++)
3080 warning ("Remote reply is of odd length: %s", buf
);
3081 /* Don't change register_bytes_found in this case, and don't
3082 print a second warning. */
3085 if (p
[0] == 'x' && p
[1] == 'x')
3086 regs
[i
] = 0; /* 'x' */
3088 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3092 if (i
!= register_bytes_found
)
3094 register_bytes_found
= i
;
3095 #ifdef REGISTER_BYTES_OK
3096 if (!REGISTER_BYTES_OK (i
))
3097 warning ("Remote reply is too short: %s", buf
);
3102 for (i
= 0; i
< NUM_REGS
; i
++)
3104 supply_register (i
, ®s
[REGISTER_BYTE (i
)]);
3105 if (buf
[REGISTER_BYTE (i
) * 2] == 'x')
3106 register_valid
[i
] = -1; /* register value not available */
3110 /* Prepare to store registers. Since we may send them all (using a
3111 'G' request), we have to read out the ones we don't want to change
3115 remote_prepare_to_store (void)
3117 /* Make sure the entire registers array is valid. */
3118 switch (remote_protocol_P
.support
)
3120 case PACKET_DISABLE
:
3121 case PACKET_SUPPORT_UNKNOWN
:
3122 read_register_bytes (0, (char *) NULL
, REGISTER_BYTES
);
3129 /* Helper: Attempt to store REGNO using the P packet. Return fail IFF
3130 packet was not recognized. */
3133 store_register_using_P (int regno
)
3135 /* Try storing a single register. */
3136 char *buf
= alloca (PBUFSIZ
);
3141 sprintf (buf
, "P%x=", regno
);
3142 p
= buf
+ strlen (buf
);
3143 regp
= ®isters
[REGISTER_BYTE (regno
)];
3144 for (i
= 0; i
< REGISTER_RAW_SIZE (regno
); ++i
)
3146 *p
++ = tohex ((regp
[i
] >> 4) & 0xf);
3147 *p
++ = tohex (regp
[i
] & 0xf);
3150 remote_send (buf
, PBUFSIZ
);
3152 return buf
[0] != '\0';
3156 /* Store register REGNO, or all registers if REGNO == -1, from the contents
3157 of REGISTERS. FIXME: ignores errors. */
3160 remote_store_registers (int regno
)
3162 char *buf
= alloca (PBUFSIZ
);
3166 set_thread (inferior_pid
, 1);
3170 switch (remote_protocol_P
.support
)
3172 case PACKET_DISABLE
:
3175 if (store_register_using_P (regno
))
3178 error ("Protocol error: P packet not recognized by stub");
3179 case PACKET_SUPPORT_UNKNOWN
:
3180 if (store_register_using_P (regno
))
3182 /* The stub recognized the 'P' packet. Remember this. */
3183 remote_protocol_P
.support
= PACKET_ENABLE
;
3188 /* The stub does not support the 'P' packet. Use 'G'
3189 instead, and don't try using 'P' in the future (it
3190 will just waste our time). */
3191 remote_protocol_P
.support
= PACKET_DISABLE
;
3199 /* Command describes registers byte by byte,
3200 each byte encoded as two hex characters. */
3203 /* remote_prepare_to_store insures that register_bytes_found gets set. */
3204 for (i
= 0; i
< register_bytes_found
; i
++)
3206 *p
++ = tohex ((registers
[i
] >> 4) & 0xf);
3207 *p
++ = tohex (registers
[i
] & 0xf);
3211 remote_send (buf
, PBUFSIZ
);
3215 /* Return the number of hex digits in num. */
3218 hexnumlen (ULONGEST num
)
3222 for (i
= 0; num
!= 0; i
++)
3228 /* Set BUF to the minimum number of hex digits representing NUM. */
3231 hexnumstr (char *buf
, ULONGEST num
)
3233 int len
= hexnumlen (num
);
3234 return hexnumnstr (buf
, num
, len
);
3238 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
3241 hexnumnstr (char *buf
, ULONGEST num
, int width
)
3247 for (i
= width
- 1; i
>= 0; i
--)
3249 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
3256 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
3259 remote_address_masked (CORE_ADDR addr
)
3261 if (remote_address_size
> 0
3262 && remote_address_size
< (sizeof (ULONGEST
) * 8))
3264 /* Only create a mask when that mask can safely be constructed
3265 in a ULONGEST variable. */
3267 mask
= (mask
<< remote_address_size
) - 1;
3273 /* Determine whether the remote target supports binary downloading.
3274 This is accomplished by sending a no-op memory write of zero length
3275 to the target at the specified address. It does not suffice to send
3276 the whole packet, since many stubs strip the eighth bit and subsequently
3277 compute a wrong checksum, which causes real havoc with remote_write_bytes.
3279 NOTE: This can still lose if the serial line is not eight-bit
3280 clean. In cases like this, the user should clear "remote
3284 check_binary_download (CORE_ADDR addr
)
3286 switch (remote_protocol_binary_download
.support
)
3288 case PACKET_DISABLE
:
3292 case PACKET_SUPPORT_UNKNOWN
:
3294 char *buf
= alloca (PBUFSIZ
);
3299 p
+= hexnumstr (p
, (ULONGEST
) addr
);
3301 p
+= hexnumstr (p
, (ULONGEST
) 0);
3305 putpkt_binary (buf
, (int) (p
- buf
));
3306 getpkt (buf
, PBUFSIZ
, 0);
3311 fprintf_unfiltered (gdb_stdlog
,
3312 "binary downloading NOT suppported by target\n");
3313 remote_protocol_binary_download
.support
= PACKET_DISABLE
;
3318 fprintf_unfiltered (gdb_stdlog
,
3319 "binary downloading suppported by target\n");
3320 remote_protocol_binary_download
.support
= PACKET_ENABLE
;
3327 /* Write memory data directly to the remote machine.
3328 This does not inform the data cache; the data cache uses this.
3329 MEMADDR is the address in the remote memory space.
3330 MYADDR is the address of the buffer in our space.
3331 LEN is the number of bytes.
3333 Returns number of bytes transferred, or 0 (setting errno) for
3334 error. Only transfer a single packet. */
3337 remote_write_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
)
3340 int max_buf_size
; /* Max size of packet output buffer */
3342 unsigned char *plen
;
3348 /* Verify that the target can support a binary download */
3349 check_binary_download (memaddr
);
3351 /* Determine the max packet size. */
3352 max_buf_size
= get_memory_write_packet_size ();
3353 sizeof_buf
= max_buf_size
+ 1; /* Space for trailing NUL */
3354 buf
= alloca (sizeof_buf
);
3356 /* Subtract header overhead from max payload size - $M<memaddr>,<len>:#nn */
3357 max_buf_size
-= 2 + hexnumlen (memaddr
+ len
- 1) + 1 + hexnumlen (len
) + 4;
3359 /* construct "M"<memaddr>","<len>":" */
3360 /* sprintf (buf, "M%lx,%x:", (unsigned long) memaddr, todo); */
3363 /* Append [XM]. Compute a best guess of the number of bytes
3364 actually transfered. */
3365 switch (remote_protocol_binary_download
.support
)
3369 /* Best guess at number of bytes that will fit. */
3370 todo
= min (len
, max_buf_size
);
3372 case PACKET_DISABLE
:
3374 /* num bytes that will fit */
3375 todo
= min (len
, max_buf_size
/ 2);
3377 case PACKET_SUPPORT_UNKNOWN
:
3378 internal_error ("remote_write_bytes: bad switch");
3381 /* Append <memaddr> */
3382 memaddr
= remote_address_masked (memaddr
);
3383 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
3386 /* Append <len>. Retain the location/size of <len>. It may
3387 need to be adjusted once the packet body has been created. */
3389 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
3394 /* Append the packet body. */
3395 switch (remote_protocol_binary_download
.support
)
3398 /* Binary mode. Send target system values byte by byte, in
3399 increasing byte addresses. Only escape certain critical
3402 (nr_bytes
< todo
) && (p
- buf
) < (max_buf_size
- 2);
3405 switch (myaddr
[nr_bytes
] & 0xff)
3410 /* These must be escaped */
3412 *p
++ = (myaddr
[nr_bytes
] & 0xff) ^ 0x20;
3415 *p
++ = myaddr
[nr_bytes
] & 0xff;
3419 if (nr_bytes
< todo
)
3421 /* Escape chars have filled up the buffer prematurely,
3422 and we have actually sent fewer bytes than planned.
3423 Fix-up the length field of the packet. Use the same
3424 number of characters as before. */
3426 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
3427 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
3430 case PACKET_DISABLE
:
3431 /* Normal mode: Send target system values byte by byte, in
3432 increasing byte addresses. Each byte is encoded as a two hex
3434 for (nr_bytes
= 0; nr_bytes
< todo
; nr_bytes
++)
3436 *p
++ = tohex ((myaddr
[nr_bytes
] >> 4) & 0xf);
3437 *p
++ = tohex (myaddr
[nr_bytes
] & 0xf);
3441 case PACKET_SUPPORT_UNKNOWN
:
3442 internal_error ("remote_write_bytes: bad switch");
3445 putpkt_binary (buf
, (int) (p
- buf
));
3446 getpkt (buf
, sizeof_buf
, 0);
3450 /* There is no correspondance between what the remote protocol
3451 uses for errors and errno codes. We would like a cleaner way
3452 of representing errors (big enough to include errno codes,
3453 bfd_error codes, and others). But for now just return EIO. */
3458 /* Return NR_BYTES, not TODO, in case escape chars caused us to send fewer
3459 bytes than we'd planned. */
3463 /* Read memory data directly from the remote machine.
3464 This does not use the data cache; the data cache uses this.
3465 MEMADDR is the address in the remote memory space.
3466 MYADDR is the address of the buffer in our space.
3467 LEN is the number of bytes.
3469 Returns number of bytes transferred, or 0 for error. */
3471 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
3472 remote targets) shouldn't attempt to read the entire buffer.
3473 Instead it should read a single packet worth of data and then
3474 return the byte size of that packet to the caller. The caller (its
3475 caller and its callers caller ;-) already contains code for
3476 handling partial reads. */
3479 remote_read_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
)
3482 int max_buf_size
; /* Max size of packet output buffer */
3486 /* Create a buffer big enough for this packet. */
3487 max_buf_size
= get_memory_read_packet_size ();
3488 sizeof_buf
= max_buf_size
+ 1; /* Space for trailing NUL */
3489 buf
= alloca (sizeof_buf
);
3498 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
3500 /* construct "m"<memaddr>","<len>" */
3501 /* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */
3502 memaddr
= remote_address_masked (memaddr
);
3505 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
3507 p
+= hexnumstr (p
, (ULONGEST
) todo
);
3511 getpkt (buf
, sizeof_buf
, 0);
3515 /* There is no correspondance between what the remote protocol uses
3516 for errors and errno codes. We would like a cleaner way of
3517 representing errors (big enough to include errno codes, bfd_error
3518 codes, and others). But for now just return EIO. */
3523 /* Reply describes memory byte by byte,
3524 each byte encoded as two hex characters. */
3527 for (i
= 0; i
< todo
; i
++)
3529 if (p
[0] == 0 || p
[1] == 0)
3530 /* Reply is short. This means that we were able to read
3531 only part of what we wanted to. */
3532 return i
+ (origlen
- len
);
3533 myaddr
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3543 /* Read or write LEN bytes from inferior memory at MEMADDR,
3544 transferring to or from debugger address BUFFER. Write to inferior if
3545 SHOULD_WRITE is nonzero. Returns length of data written or read; 0
3550 remote_xfer_memory (mem_addr
, buffer
, mem_len
, should_write
, target
)
3555 struct target_ops
*target
; /* ignored */
3557 CORE_ADDR targ_addr
;
3559 REMOTE_TRANSLATE_XFER_ADDRESS (mem_addr
, mem_len
, &targ_addr
, &targ_len
);
3563 return dcache_xfer_memory (remote_dcache
, targ_addr
, buffer
,
3564 targ_len
, should_write
);
3569 /* Enable after 4.12. */
3572 remote_search (len
, data
, mask
, startaddr
, increment
, lorange
, hirange
3573 addr_found
, data_found
)
3577 CORE_ADDR startaddr
;
3581 CORE_ADDR
*addr_found
;
3584 if (increment
== -4 && len
== 4)
3586 long mask_long
, data_long
;
3587 long data_found_long
;
3588 CORE_ADDR addr_we_found
;
3589 char *buf
= alloca (PBUFSIZ
);
3590 long returned_long
[2];
3593 mask_long
= extract_unsigned_integer (mask
, len
);
3594 data_long
= extract_unsigned_integer (data
, len
);
3595 sprintf (buf
, "t%x:%x,%x", startaddr
, data_long
, mask_long
);
3597 getpkt (buf
, PBUFSIZ
, 0);
3600 /* The stub doesn't support the 't' request. We might want to
3601 remember this fact, but on the other hand the stub could be
3602 switched on us. Maybe we should remember it only until
3603 the next "target remote". */
3604 generic_search (len
, data
, mask
, startaddr
, increment
, lorange
,
3605 hirange
, addr_found
, data_found
);
3610 /* There is no correspondance between what the remote protocol uses
3611 for errors and errno codes. We would like a cleaner way of
3612 representing errors (big enough to include errno codes, bfd_error
3613 codes, and others). But for now just use EIO. */
3614 memory_error (EIO
, startaddr
);
3617 while (*p
!= '\0' && *p
!= ',')
3618 addr_we_found
= (addr_we_found
<< 4) + fromhex (*p
++);
3620 error ("Protocol error: short return for search");
3622 data_found_long
= 0;
3623 while (*p
!= '\0' && *p
!= ',')
3624 data_found_long
= (data_found_long
<< 4) + fromhex (*p
++);
3625 /* Ignore anything after this comma, for future extensions. */
3627 if (addr_we_found
< lorange
|| addr_we_found
>= hirange
)
3633 *addr_found
= addr_we_found
;
3634 *data_found
= store_unsigned_integer (data_we_found
, len
);
3637 generic_search (len
, data
, mask
, startaddr
, increment
, lorange
,
3638 hirange
, addr_found
, data_found
);
3643 remote_files_info (struct target_ops
*ignore
)
3645 puts_filtered ("Debugging a target over a serial line.\n");
3648 /* Stuff for dealing with the packets which are part of this protocol.
3649 See comment at top of file for details. */
3651 /* Read a single character from the remote end, masking it down to 7 bits. */
3654 readchar (int timeout
)
3658 ch
= SERIAL_READCHAR (remote_desc
, timeout
);
3663 switch ((enum serial_rc
) ch
)
3666 target_mourn_inferior ();
3667 error ("Remote connection closed");
3670 perror_with_name ("Remote communication error");
3672 case SERIAL_TIMEOUT
:
3678 /* Send the command in BUF to the remote machine, and read the reply
3679 into BUF. Report an error if we get an error reply. */
3682 remote_send (char *buf
,
3686 getpkt (buf
, sizeof_buf
, 0);
3689 error ("Remote failure reply: %s", buf
);
3692 /* Display a null-terminated packet on stdout, for debugging, using C
3696 print_packet (char *buf
)
3698 puts_filtered ("\"");
3699 fputstr_filtered (buf
, '"', gdb_stdout
);
3700 puts_filtered ("\"");
3706 return putpkt_binary (buf
, strlen (buf
));
3709 /* Send a packet to the remote machine, with error checking. The data
3710 of the packet is in BUF. The string in BUF can be at most PBUFSIZ - 5
3711 to account for the $, # and checksum, and for a possible /0 if we are
3712 debugging (remote_debug) and want to print the sent packet as a string */
3715 putpkt_binary (char *buf
, int cnt
)
3718 unsigned char csum
= 0;
3719 char *buf2
= alloca (cnt
+ 6);
3720 long sizeof_junkbuf
= PBUFSIZ
;
3721 char *junkbuf
= alloca (sizeof_junkbuf
);
3727 /* Copy the packet into buffer BUF2, encapsulating it
3728 and giving it a checksum. */
3733 for (i
= 0; i
< cnt
; i
++)
3739 *p
++ = tohex ((csum
>> 4) & 0xf);
3740 *p
++ = tohex (csum
& 0xf);
3742 /* Send it over and over until we get a positive ack. */
3746 int started_error_output
= 0;
3751 fprintf_unfiltered (gdb_stdlog
, "Sending packet: ");
3752 fputstrn_unfiltered (buf2
, p
- buf2
, 0, gdb_stdlog
);
3753 fprintf_unfiltered (gdb_stdlog
, "...");
3754 gdb_flush (gdb_stdlog
);
3756 if (SERIAL_WRITE (remote_desc
, buf2
, p
- buf2
))
3757 perror_with_name ("putpkt: write failed");
3759 /* read until either a timeout occurs (-2) or '+' is read */
3762 ch
= readchar (remote_timeout
);
3770 case SERIAL_TIMEOUT
:
3772 if (started_error_output
)
3774 putchar_unfiltered ('\n');
3775 started_error_output
= 0;
3784 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
3788 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
3789 case SERIAL_TIMEOUT
:
3793 break; /* Retransmit buffer */
3796 /* It's probably an old response, and we're out of sync.
3797 Just gobble up the packet and ignore it. */
3798 getpkt (junkbuf
, sizeof_junkbuf
, 0);
3799 continue; /* Now, go look for + */
3804 if (!started_error_output
)
3806 started_error_output
= 1;
3807 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
3809 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
3813 break; /* Here to retransmit */
3817 /* This is wrong. If doing a long backtrace, the user should be
3818 able to get out next time we call QUIT, without anything as
3819 violent as interrupt_query. If we want to provide a way out of
3820 here without getting to the next QUIT, it should be based on
3821 hitting ^C twice as in remote_wait. */
3831 static int remote_cisco_mode
;
3833 /* Come here after finding the start of the frame. Collect the rest
3834 into BUF, verifying the checksum, length, and handling run-length
3835 compression. No more than sizeof_buf-1 characters are read so that
3836 the buffer can be NUL terminated.
3838 Returns -1 on error, number of characters in buffer (ignoring the
3839 trailing NULL) on success. (could be extended to return one of the
3840 SERIAL status indications). */
3843 read_frame (char *buf
,
3855 /* ASSERT (bc < sizeof_buf - 1) - space for trailing NUL */
3856 c
= readchar (remote_timeout
);
3859 case SERIAL_TIMEOUT
:
3861 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
3865 fputs_filtered ("Saw new packet start in middle of old one\n",
3867 return -1; /* Start a new packet, count retries */
3870 unsigned char pktcsum
;
3874 pktcsum
= fromhex (readchar (remote_timeout
)) << 4;
3875 pktcsum
|= fromhex (readchar (remote_timeout
));
3877 if (csum
== pktcsum
)
3882 fprintf_filtered (gdb_stdlog
,
3883 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
3885 fputs_filtered (buf
, gdb_stdlog
);
3886 fputs_filtered ("\n", gdb_stdlog
);
3888 /* Number of characters in buffer ignoring trailing
3892 case '*': /* Run length encoding */
3897 if (remote_cisco_mode
== 0)
3899 c
= readchar (remote_timeout
);
3901 repeat
= c
- ' ' + 3; /* Compute repeat count */
3905 /* Cisco's run-length encoding variant uses two
3906 hex chars to represent the repeat count. */
3908 c
= readchar (remote_timeout
);
3910 repeat
= fromhex (c
) << 4;
3911 c
= readchar (remote_timeout
);
3913 repeat
+= fromhex (c
);
3916 /* The character before ``*'' is repeated. */
3918 if (repeat
> 0 && repeat
<= 255
3920 && bc
+ repeat
< sizeof_buf
- 1)
3922 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
3928 printf_filtered ("Repeat count %d too large for buffer: ", repeat
);
3929 puts_filtered (buf
);
3930 puts_filtered ("\n");
3934 if (bc
< sizeof_buf
- 1)
3942 puts_filtered ("Remote packet too long: ");
3943 puts_filtered (buf
);
3944 puts_filtered ("\n");
3951 /* Read a packet from the remote machine, with error checking, and
3952 store it in BUF. If FOREVER, wait forever rather than timing out;
3953 this is used (in synchronous mode) to wait for a target that is is
3954 executing user code to stop. */
3955 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
3956 don't have to change all the calls to getpkt to deal with the
3957 return value, because at the moment I don't know what the right
3958 thing to do it for those. */
3966 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
3970 /* Read a packet from the remote machine, with error checking, and
3971 store it in BUF. If FOREVER, wait forever rather than timing out;
3972 this is used (in synchronous mode) to wait for a target that is is
3973 executing user code to stop. If FOREVER == 0, this function is
3974 allowed to time out gracefully and return an indication of this to
3977 getpkt_sane (char *buf
,
3986 strcpy (buf
, "timeout");
3990 timeout
= watchdog
> 0 ? watchdog
: -1;
3994 timeout
= remote_timeout
;
3998 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
4000 /* This can loop forever if the remote side sends us characters
4001 continuously, but if it pauses, we'll get a zero from readchar
4002 because of timeout. Then we'll count that as a retry. */
4004 /* Note that we will only wait forever prior to the start of a packet.
4005 After that, we expect characters to arrive at a brisk pace. They
4006 should show up within remote_timeout intervals. */
4010 c
= readchar (timeout
);
4012 if (c
== SERIAL_TIMEOUT
)
4014 if (forever
) /* Watchdog went off? Kill the target. */
4017 target_mourn_inferior ();
4018 error ("Watchdog has expired. Target detached.\n");
4021 fputs_filtered ("Timed out.\n", gdb_stdlog
);
4027 /* We've found the start of a packet, now collect the data. */
4029 val
= read_frame (buf
, sizeof_buf
);
4035 fprintf_unfiltered (gdb_stdlog
, "Packet received: ");
4036 fputstr_unfiltered (buf
, 0, gdb_stdlog
);
4037 fprintf_unfiltered (gdb_stdlog
, "\n");
4039 SERIAL_WRITE (remote_desc
, "+", 1);
4043 /* Try the whole thing again. */
4045 SERIAL_WRITE (remote_desc
, "-", 1);
4048 /* We have tried hard enough, and just can't receive the packet. Give up. */
4050 printf_unfiltered ("Ignoring packet error, continuing...\n");
4051 SERIAL_WRITE (remote_desc
, "+", 1);
4058 /* For some mysterious reason, wait_for_inferior calls kill instead of
4059 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4063 target_mourn_inferior ();
4067 /* Use catch_errors so the user can quit from gdb even when we aren't on
4068 speaking terms with the remote system. */
4069 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4071 /* Don't wait for it to die. I'm not really sure it matters whether
4072 we do or not. For the existing stubs, kill is a noop. */
4073 target_mourn_inferior ();
4076 /* Async version of remote_kill. */
4078 remote_async_kill (void)
4080 /* Unregister the file descriptor from the event loop. */
4081 if (target_is_async_p ())
4082 SERIAL_ASYNC (remote_desc
, NULL
, 0);
4084 /* For some mysterious reason, wait_for_inferior calls kill instead of
4085 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4089 target_mourn_inferior ();
4093 /* Use catch_errors so the user can quit from gdb even when we aren't on
4094 speaking terms with the remote system. */
4095 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4097 /* Don't wait for it to die. I'm not really sure it matters whether
4098 we do or not. For the existing stubs, kill is a noop. */
4099 target_mourn_inferior ();
4105 remote_mourn_1 (&remote_ops
);
4109 remote_async_mourn (void)
4111 remote_mourn_1 (&remote_async_ops
);
4115 extended_remote_mourn (void)
4117 /* We do _not_ want to mourn the target like this; this will
4118 remove the extended remote target from the target stack,
4119 and the next time the user says "run" it'll fail.
4121 FIXME: What is the right thing to do here? */
4123 remote_mourn_1 (&extended_remote_ops
);
4127 /* Worker function for remote_mourn. */
4129 remote_mourn_1 (struct target_ops
*target
)
4131 unpush_target (target
);
4132 generic_mourn_inferior ();
4135 /* In the extended protocol we want to be able to do things like
4136 "run" and have them basically work as expected. So we need
4137 a special create_inferior function.
4139 FIXME: One day add support for changing the exec file
4140 we're debugging, arguments and an environment. */
4143 extended_remote_create_inferior (char *exec_file
, char *args
, char **env
)
4145 /* Rip out the breakpoints; we'll reinsert them after restarting
4146 the remote server. */
4147 remove_breakpoints ();
4149 /* Now restart the remote server. */
4150 extended_remote_restart ();
4152 /* Now put the breakpoints back in. This way we're safe if the
4153 restart function works via a unix fork on the remote side. */
4154 insert_breakpoints ();
4156 /* Clean up from the last time we were running. */
4157 clear_proceed_status ();
4159 /* Let the remote process run. */
4160 proceed (-1, TARGET_SIGNAL_0
, 0);
4163 /* Async version of extended_remote_create_inferior. */
4165 extended_remote_async_create_inferior (char *exec_file
, char *args
, char **env
)
4167 /* Rip out the breakpoints; we'll reinsert them after restarting
4168 the remote server. */
4169 remove_breakpoints ();
4171 /* If running asynchronously, register the target file descriptor
4172 with the event loop. */
4173 if (event_loop_p
&& target_can_async_p ())
4174 target_async (inferior_event_handler
, 0);
4176 /* Now restart the remote server. */
4177 extended_remote_restart ();
4179 /* Now put the breakpoints back in. This way we're safe if the
4180 restart function works via a unix fork on the remote side. */
4181 insert_breakpoints ();
4183 /* Clean up from the last time we were running. */
4184 clear_proceed_status ();
4186 /* Let the remote process run. */
4187 proceed (-1, TARGET_SIGNAL_0
, 0);
4191 /* On some machines, e.g. 68k, we may use a different breakpoint instruction
4192 than other targets; in those use REMOTE_BREAKPOINT instead of just
4193 BREAKPOINT. Also, bi-endian targets may define LITTLE_REMOTE_BREAKPOINT
4194 and BIG_REMOTE_BREAKPOINT. If none of these are defined, we just call
4195 the standard routines that are in mem-break.c. */
4197 /* FIXME, these ought to be done in a more dynamic fashion. For instance,
4198 the choice of breakpoint instruction affects target program design and
4199 vice versa, and by making it user-tweakable, the special code here
4200 goes away and we need fewer special GDB configurations. */
4202 #if defined (LITTLE_REMOTE_BREAKPOINT) && defined (BIG_REMOTE_BREAKPOINT) && !defined(REMOTE_BREAKPOINT)
4203 #define REMOTE_BREAKPOINT
4206 #ifdef REMOTE_BREAKPOINT
4208 /* If the target isn't bi-endian, just pretend it is. */
4209 #if !defined (LITTLE_REMOTE_BREAKPOINT) && !defined (BIG_REMOTE_BREAKPOINT)
4210 #define LITTLE_REMOTE_BREAKPOINT REMOTE_BREAKPOINT
4211 #define BIG_REMOTE_BREAKPOINT REMOTE_BREAKPOINT
4214 static unsigned char big_break_insn
[] = BIG_REMOTE_BREAKPOINT
;
4215 static unsigned char little_break_insn
[] = LITTLE_REMOTE_BREAKPOINT
;
4217 #endif /* REMOTE_BREAKPOINT */
4219 /* Insert a breakpoint on targets that don't have any better breakpoint
4220 support. We read the contents of the target location and stash it,
4221 then overwrite it with a breakpoint instruction. ADDR is the target
4222 location in the target machine. CONTENTS_CACHE is a pointer to
4223 memory allocated for saving the target contents. It is guaranteed
4224 by the caller to be long enough to save sizeof BREAKPOINT bytes (this
4225 is accomplished via BREAKPOINT_MAX). */
4228 remote_insert_breakpoint (CORE_ADDR addr
, char *contents_cache
)
4230 #ifdef REMOTE_BREAKPOINT
4235 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
4236 If it succeeds, then set the support to PACKET_ENABLE. If it
4237 fails, and the user has explicitly requested the Z support then
4238 report an error, otherwise, mark it disabled and go on. */
4240 if (remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
].support
!= PACKET_DISABLE
)
4242 char *buf
= alloca (PBUFSIZ
);
4245 addr
= remote_address_masked (addr
);
4249 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4250 BREAKPOINT_FROM_PC (&addr
, &bp_size
);
4251 sprintf (p
, ",%d", bp_size
);
4254 getpkt (buf
, PBUFSIZ
, 0);
4256 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]))
4262 case PACKET_UNKNOWN
:
4267 #ifdef REMOTE_BREAKPOINT
4268 val
= target_read_memory (addr
, contents_cache
, sizeof big_break_insn
);
4272 if (TARGET_BYTE_ORDER
== BIG_ENDIAN
)
4273 val
= target_write_memory (addr
, (char *) big_break_insn
,
4274 sizeof big_break_insn
);
4276 val
= target_write_memory (addr
, (char *) little_break_insn
,
4277 sizeof little_break_insn
);
4282 return memory_insert_breakpoint (addr
, contents_cache
);
4283 #endif /* REMOTE_BREAKPOINT */
4287 remote_remove_breakpoint (CORE_ADDR addr
, char *contents_cache
)
4291 if (remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
].support
!= PACKET_DISABLE
)
4293 char *buf
= alloca (PBUFSIZ
);
4300 addr
= remote_address_masked (addr
);
4301 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4302 BREAKPOINT_FROM_PC (&addr
, &bp_size
);
4303 sprintf (p
, ",%d", bp_size
);
4306 getpkt (buf
, PBUFSIZ
, 0);
4308 return (buf
[0] == 'E');
4311 #ifdef REMOTE_BREAKPOINT
4312 return target_write_memory (addr
, contents_cache
, sizeof big_break_insn
);
4314 return memory_remove_breakpoint (addr
, contents_cache
);
4315 #endif /* REMOTE_BREAKPOINT */
4319 watchpoint_to_Z_packet (int type
)
4333 internal_error ("hw_bp_to_z: bad watchpoint type %d", type
);
4337 /* FIXME: This function should be static and a member of the remote
4341 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
4343 char *buf
= alloca (PBUFSIZ
);
4345 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
4347 if (remote_protocol_Z
[packet
].support
== PACKET_DISABLE
)
4348 error ("Can't set hardware watchpoints without the '%s' (%s) packet\n",
4349 remote_protocol_Z
[packet
].name
,
4350 remote_protocol_Z
[packet
].title
);
4352 sprintf (buf
, "Z%x,", packet
);
4353 p
= strchr (buf
, '\0');
4354 addr
= remote_address_masked (addr
);
4355 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4356 sprintf (p
, ",%x", len
);
4359 getpkt (buf
, PBUFSIZ
, 0);
4361 switch (packet_ok (buf
, &remote_protocol_Z
[packet
]))
4364 case PACKET_UNKNOWN
:
4369 internal_error ("remote_insert_watchpoint: reached end of function");
4372 /* FIXME: This function should be static and a member of the remote
4376 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
4378 char *buf
= alloca (PBUFSIZ
);
4380 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
4382 if (remote_protocol_Z
[packet
].support
== PACKET_DISABLE
)
4383 error ("Can't clear hardware watchpoints without the '%s' (%s) packet\n",
4384 remote_protocol_Z
[packet
].name
,
4385 remote_protocol_Z
[packet
].title
);
4387 sprintf (buf
, "z%x,", packet
);
4388 p
= strchr (buf
, '\0');
4389 addr
= remote_address_masked (addr
);
4390 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4391 sprintf (p
, ",%x", len
);
4393 getpkt (buf
, PBUFSIZ
, 0);
4395 switch (packet_ok (buf
, &remote_protocol_Z
[packet
]))
4398 case PACKET_UNKNOWN
:
4403 internal_error ("remote_remove_watchpoint: reached end of function");
4406 /* FIXME: This function should be static and a member of the remote
4410 remote_insert_hw_breakpoint (CORE_ADDR addr
, int len
)
4412 char *buf
= alloca (PBUFSIZ
);
4415 if (remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].support
== PACKET_DISABLE
)
4416 error ("Can't set hardware breakpoint without the '%s' (%s) packet\n",
4417 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].name
,
4418 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].title
);
4424 addr
= remote_address_masked (addr
);
4425 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4429 getpkt (buf
, PBUFSIZ
, 0);
4431 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]))
4434 case PACKET_UNKNOWN
:
4439 internal_error ("remote_remove_watchpoint: reached end of function");
4442 /* FIXME: This function should be static and a member of the remote
4446 remote_remove_hw_breakpoint (CORE_ADDR addr
, int len
)
4448 char *buf
= alloca (PBUFSIZ
);
4451 if (remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].support
== PACKET_DISABLE
)
4452 error ("Can't clear hardware breakpoint without the '%s' (%s) packet\n",
4453 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].name
,
4454 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].title
);
4460 addr
= remote_address_masked (addr
);
4461 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4465 getpkt (buf
, PBUFSIZ
, 0);
4467 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]))
4470 case PACKET_UNKNOWN
:
4475 internal_error ("remote_remove_watchpoint: reached end of function");
4478 /* Some targets are only capable of doing downloads, and afterwards
4479 they switch to the remote serial protocol. This function provides
4480 a clean way to get from the download target to the remote target.
4481 It's basically just a wrapper so that we don't have to expose any
4482 of the internal workings of remote.c.
4484 Prior to calling this routine, you should shutdown the current
4485 target code, else you will get the "A program is being debugged
4486 already..." message. Usually a call to pop_target() suffices. */
4489 push_remote_target (char *name
, int from_tty
)
4491 printf_filtered ("Switching to remote protocol\n");
4492 remote_open (name
, from_tty
);
4495 /* Other targets want to use the entire remote serial module but with
4496 certain remote_ops overridden. */
4499 open_remote_target (char *name
, int from_tty
, struct target_ops
*target
,
4502 printf_filtered ("Selecting the %sremote protocol\n",
4503 (extended_p
? "extended-" : ""));
4504 remote_open_1 (name
, from_tty
, target
, extended_p
);
4507 /* Table used by the crc32 function to calcuate the checksum. */
4509 static unsigned long crc32_table
[256] =
4512 static unsigned long
4513 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
4515 if (!crc32_table
[1])
4517 /* Initialize the CRC table and the decoding table. */
4521 for (i
= 0; i
< 256; i
++)
4523 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
4524 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
4531 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
4537 /* compare-sections command
4539 With no arguments, compares each loadable section in the exec bfd
4540 with the same memory range on the target, and reports mismatches.
4541 Useful for verifying the image on the target against the exec file.
4542 Depends on the target understanding the new "qCRC:" request. */
4544 /* FIXME: cagney/1999-10-26: This command should be broken down into a
4545 target method (target verify memory) and generic version of the
4546 actual command. This will allow other high-level code (especially
4547 generic_load()) to make use of this target functionality. */
4550 compare_sections_command (char *args
, int from_tty
)
4553 unsigned long host_crc
, target_crc
;
4554 extern bfd
*exec_bfd
;
4555 struct cleanup
*old_chain
;
4559 char *buf
= alloca (PBUFSIZ
);
4566 error ("command cannot be used without an exec file");
4567 if (!current_target
.to_shortname
||
4568 strcmp (current_target
.to_shortname
, "remote") != 0)
4569 error ("command can only be used with remote target");
4571 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
4573 if (!(s
->flags
& SEC_LOAD
))
4574 continue; /* skip non-loadable section */
4576 size
= bfd_get_section_size_before_reloc (s
);
4578 continue; /* skip zero-length section */
4580 sectname
= (char *) bfd_get_section_name (exec_bfd
, s
);
4581 if (args
&& strcmp (args
, sectname
) != 0)
4582 continue; /* not the section selected by user */
4584 matched
= 1; /* do this section */
4586 /* FIXME: assumes lma can fit into long */
4587 sprintf (buf
, "qCRC:%lx,%lx", (long) lma
, (long) size
);
4590 /* be clever; compute the host_crc before waiting for target reply */
4591 sectdata
= xmalloc (size
);
4592 old_chain
= make_cleanup (free
, sectdata
);
4593 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
4594 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
4596 getpkt (buf
, PBUFSIZ
, 0);
4598 error ("target memory fault, section %s, range 0x%08x -- 0x%08x",
4599 sectname
, lma
, lma
+ size
);
4601 error ("remote target does not support this operation");
4603 for (target_crc
= 0, tmp
= &buf
[1]; *tmp
; tmp
++)
4604 target_crc
= target_crc
* 16 + fromhex (*tmp
);
4606 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
4607 sectname
, paddr (lma
), paddr (lma
+ size
));
4608 if (host_crc
== target_crc
)
4609 printf_filtered ("matched.\n");
4612 printf_filtered ("MIS-MATCHED!\n");
4616 do_cleanups (old_chain
);
4619 warning ("One or more sections of the remote executable does not match\n\
4620 the loaded file\n");
4621 if (args
&& !matched
)
4622 printf_filtered ("No loaded section named '%s'.\n", args
);
4626 remote_query (int query_type
, char *buf
, char *outbuf
, int *bufsiz
)
4629 char *buf2
= alloca (PBUFSIZ
);
4630 char *p2
= &buf2
[0];
4633 error ("null pointer to remote bufer size specified");
4635 /* minimum outbuf size is PBUFSIZ - if bufsiz is not large enough let
4636 the caller know and return what the minimum size is */
4637 /* Note: a zero bufsiz can be used to query the minimum buffer size */
4638 if (*bufsiz
< PBUFSIZ
)
4644 /* except for querying the minimum buffer size, target must be open */
4646 error ("remote query is only available after target open");
4648 /* we only take uppercase letters as query types, at least for now */
4649 if ((query_type
< 'A') || (query_type
> 'Z'))
4650 error ("invalid remote query type");
4653 error ("null remote query specified");
4656 error ("remote query requires a buffer to receive data");
4663 /* we used one buffer char for the remote protocol q command and another
4664 for the query type. As the remote protocol encapsulation uses 4 chars
4665 plus one extra in case we are debugging (remote_debug),
4666 we have PBUFZIZ - 7 left to pack the query string */
4668 while (buf
[i
] && (i
< (PBUFSIZ
- 8)))
4670 /* bad caller may have sent forbidden characters */
4671 if ((!isprint (buf
[i
])) || (buf
[i
] == '$') || (buf
[i
] == '#'))
4672 error ("illegal characters in query string");
4680 error ("query larger than available buffer");
4686 getpkt (outbuf
, *bufsiz
, 0);
4692 remote_rcmd (char *command
,
4693 struct ui_file
*outbuf
)
4696 char *buf
= alloca (PBUFSIZ
);
4700 error ("remote rcmd is only available after target open");
4702 /* Send a NULL command across as an empty command */
4703 if (command
== NULL
)
4706 /* The query prefix */
4707 strcpy (buf
, "qRcmd,");
4708 p
= strchr (buf
, '\0');
4710 if ((strlen (buf
) + strlen (command
) * 2 + 8/*misc*/) > PBUFSIZ
)
4711 error ("\"monitor\" command ``%s'' is too long\n", command
);
4713 /* Encode the actual command */
4714 for (i
= 0; command
[i
]; i
++)
4716 *p
++ = tohex ((command
[i
] >> 4) & 0xf);
4717 *p
++ = tohex (command
[i
] & 0xf);
4721 if (putpkt (buf
) < 0)
4722 error ("Communication problem with target\n");
4724 /* get/display the response */
4727 /* XXX - see also tracepoint.c:remote_get_noisy_reply() */
4729 getpkt (buf
, PBUFSIZ
, 0);
4731 error ("Target does not support this command\n");
4732 if (buf
[0] == 'O' && buf
[1] != 'K')
4734 remote_console_output (buf
+ 1); /* 'O' message from stub */
4737 if (strcmp (buf
, "OK") == 0)
4739 if (strlen (buf
) == 3 && buf
[0] == 'E'
4740 && isdigit (buf
[1]) && isdigit (buf
[2]))
4742 error ("Protocol error with Rcmd");
4744 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
4746 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
4747 fputc_unfiltered (c
, outbuf
);
4754 packet_command (char *args
, int from_tty
)
4756 char *buf
= alloca (PBUFSIZ
);
4759 error ("command can only be used with remote target");
4762 error ("remote-packet command requires packet text as argument");
4764 puts_filtered ("sending: ");
4765 print_packet (args
);
4766 puts_filtered ("\n");
4769 getpkt (buf
, PBUFSIZ
, 0);
4770 puts_filtered ("received: ");
4772 puts_filtered ("\n");
4776 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------------- */
4778 static void display_thread_info (struct gdb_ext_thread_info
*info
);
4780 static void threadset_test_cmd (char *cmd
, int tty
);
4782 static void threadalive_test (char *cmd
, int tty
);
4784 static void threadlist_test_cmd (char *cmd
, int tty
);
4786 int get_and_display_threadinfo (threadref
* ref
);
4788 static void threadinfo_test_cmd (char *cmd
, int tty
);
4790 static int thread_display_step (threadref
* ref
, void *context
);
4792 static void threadlist_update_test_cmd (char *cmd
, int tty
);
4794 static void init_remote_threadtests (void);
4796 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid */
4799 threadset_test_cmd (char *cmd
, int tty
)
4801 int sample_thread
= SAMPLE_THREAD
;
4803 printf_filtered ("Remote threadset test\n");
4804 set_thread (sample_thread
, 1);
4809 threadalive_test (char *cmd
, int tty
)
4811 int sample_thread
= SAMPLE_THREAD
;
4813 if (remote_thread_alive (sample_thread
))
4814 printf_filtered ("PASS: Thread alive test\n");
4816 printf_filtered ("FAIL: Thread alive test\n");
4819 void output_threadid (char *title
, threadref
* ref
);
4822 output_threadid (char *title
, threadref
*ref
)
4826 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex */
4828 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
4832 threadlist_test_cmd (char *cmd
, int tty
)
4835 threadref nextthread
;
4836 int done
, result_count
;
4837 threadref threadlist
[3];
4839 printf_filtered ("Remote Threadlist test\n");
4840 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
4841 &result_count
, &threadlist
[0]))
4842 printf_filtered ("FAIL: threadlist test\n");
4845 threadref
*scan
= threadlist
;
4846 threadref
*limit
= scan
+ result_count
;
4848 while (scan
< limit
)
4849 output_threadid (" thread ", scan
++);
4854 display_thread_info (struct gdb_ext_thread_info
*info
)
4856 output_threadid ("Threadid: ", &info
->threadid
);
4857 printf_filtered ("Name: %s\n ", info
->shortname
);
4858 printf_filtered ("State: %s\n", info
->display
);
4859 printf_filtered ("other: %s\n\n", info
->more_display
);
4863 get_and_display_threadinfo (threadref
*ref
)
4867 struct gdb_ext_thread_info threadinfo
;
4869 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
4870 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
4871 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
4872 display_thread_info (&threadinfo
);
4877 threadinfo_test_cmd (char *cmd
, int tty
)
4879 int athread
= SAMPLE_THREAD
;
4883 int_to_threadref (&thread
, athread
);
4884 printf_filtered ("Remote Threadinfo test\n");
4885 if (!get_and_display_threadinfo (&thread
))
4886 printf_filtered ("FAIL cannot get thread info\n");
4890 thread_display_step (threadref
*ref
, void *context
)
4892 /* output_threadid(" threadstep ",ref); *//* simple test */
4893 return get_and_display_threadinfo (ref
);
4897 threadlist_update_test_cmd (char *cmd
, int tty
)
4899 printf_filtered ("Remote Threadlist update test\n");
4900 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
4904 init_remote_threadtests (void)
4906 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
4907 "Fetch and print the remote list of thread identifiers, one pkt only");
4908 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
4909 "Fetch and display info about one thread");
4910 add_com ("tset", class_obscure
, threadset_test_cmd
,
4911 "Test setting to a different thread");
4912 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
4913 "Iterate through updating all remote thread info");
4914 add_com ("talive", class_obscure
, threadalive_test
,
4915 " Remote thread alive test ");
4921 init_remote_ops (void)
4923 remote_ops
.to_shortname
= "remote";
4924 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
4926 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
4927 Specify the serial device it is connected to\n\
4928 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
4929 remote_ops
.to_open
= remote_open
;
4930 remote_ops
.to_close
= remote_close
;
4931 remote_ops
.to_detach
= remote_detach
;
4932 remote_ops
.to_resume
= remote_resume
;
4933 remote_ops
.to_wait
= remote_wait
;
4934 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
4935 remote_ops
.to_store_registers
= remote_store_registers
;
4936 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
4937 remote_ops
.to_xfer_memory
= remote_xfer_memory
;
4938 remote_ops
.to_files_info
= remote_files_info
;
4939 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
4940 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
4941 remote_ops
.to_kill
= remote_kill
;
4942 remote_ops
.to_load
= generic_load
;
4943 remote_ops
.to_mourn_inferior
= remote_mourn
;
4944 remote_ops
.to_thread_alive
= remote_thread_alive
;
4945 remote_ops
.to_find_new_threads
= remote_threads_info
;
4946 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
4947 remote_ops
.to_stop
= remote_stop
;
4948 remote_ops
.to_query
= remote_query
;
4949 remote_ops
.to_rcmd
= remote_rcmd
;
4950 remote_ops
.to_stratum
= process_stratum
;
4951 remote_ops
.to_has_all_memory
= 1;
4952 remote_ops
.to_has_memory
= 1;
4953 remote_ops
.to_has_stack
= 1;
4954 remote_ops
.to_has_registers
= 1;
4955 remote_ops
.to_has_execution
= 1;
4956 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
4957 remote_ops
.to_magic
= OPS_MAGIC
;
4960 /* Set up the extended remote vector by making a copy of the standard
4961 remote vector and adding to it. */
4964 init_extended_remote_ops (void)
4966 extended_remote_ops
= remote_ops
;
4968 extended_remote_ops
.to_shortname
= "extended-remote";
4969 extended_remote_ops
.to_longname
=
4970 "Extended remote serial target in gdb-specific protocol";
4971 extended_remote_ops
.to_doc
=
4972 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
4973 Specify the serial device it is connected to (e.g. /dev/ttya).",
4974 extended_remote_ops
.to_open
= extended_remote_open
;
4975 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
4976 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
4980 * Command: info remote-process
4982 * This implements Cisco's version of the "info proc" command.
4984 * This query allows the target stub to return an arbitrary string
4985 * (or strings) giving arbitrary information about the target process.
4986 * This is optional; the target stub isn't required to implement it.
4988 * Syntax: qfProcessInfo request first string
4989 * qsProcessInfo request subsequent string
4990 * reply: 'O'<hex-encoded-string>
4991 * 'l' last reply (empty)
4995 remote_info_process (char *args
, int from_tty
)
4997 char *buf
= alloca (PBUFSIZ
);
4999 if (remote_desc
== 0)
5000 error ("Command can only be used when connected to the remote target.");
5002 putpkt ("qfProcessInfo");
5003 getpkt (buf
, PBUFSIZ
, 0);
5005 return; /* Silently: target does not support this feature. */
5008 error ("info proc: target error.");
5010 while (buf
[0] == 'O') /* Capitol-O packet */
5012 remote_console_output (&buf
[1]);
5013 putpkt ("qsProcessInfo");
5014 getpkt (buf
, PBUFSIZ
, 0);
5023 remote_cisco_open (char *name
, int from_tty
)
5027 "To open a remote debug connection, you need to specify what \n\
5028 device is attached to the remote system (e.g. host:port).");
5030 /* See FIXME above */
5031 wait_forever_enabled_p
= 1;
5033 target_preopen (from_tty
);
5035 unpush_target (&remote_cisco_ops
);
5037 remote_dcache
= dcache_init (remote_read_bytes
, remote_write_bytes
);
5039 remote_desc
= SERIAL_OPEN (name
);
5041 perror_with_name (name
);
5044 * If a baud rate was specified on the gdb command line it will
5045 * be greater than the initial value of -1. If it is, use it otherwise
5049 baud_rate
= (baud_rate
> 0) ? baud_rate
: 9600;
5050 if (SERIAL_SETBAUDRATE (remote_desc
, baud_rate
))
5052 SERIAL_CLOSE (remote_desc
);
5053 perror_with_name (name
);
5056 SERIAL_RAW (remote_desc
);
5058 /* If there is something sitting in the buffer we might take it as a
5059 response to a command, which would be bad. */
5060 SERIAL_FLUSH_INPUT (remote_desc
);
5064 puts_filtered ("Remote debugging using ");
5065 puts_filtered (name
);
5066 puts_filtered ("\n");
5069 remote_cisco_mode
= 1;
5071 push_target (&remote_cisco_ops
); /* Switch to using cisco target now */
5073 init_all_packet_configs ();
5075 general_thread
= -2;
5076 continue_thread
= -2;
5078 /* Probe for ability to use "ThreadInfo" query, as required. */
5079 use_threadinfo_query
= 1;
5080 use_threadextra_query
= 1;
5082 /* Without this, some commands which require an active target (such
5083 as kill) won't work. This variable serves (at least) double duty
5084 as both the pid of the target process (if it has such), and as a
5085 flag indicating that a target is active. These functions should
5086 be split out into seperate variables, especially since GDB will
5087 someday have a notion of debugging several processes. */
5088 inferior_pid
= MAGIC_NULL_PID
;
5090 /* Start the remote connection; if error (0), discard this target. */
5092 if (!catch_errors (remote_start_remote_dummy
, (char *) 0,
5093 "Couldn't establish connection to remote target\n",
5102 remote_cisco_close (int quitting
)
5104 remote_cisco_mode
= 0;
5105 remote_close (quitting
);
5109 remote_cisco_mourn (void)
5111 remote_mourn_1 (&remote_cisco_ops
);
5123 /* shared between readsocket() and readtty() */
5124 static char *tty_input
;
5126 static int escape_count
;
5127 static int echo_check
;
5128 extern int quit_flag
;
5135 /* Loop until the socket doesn't have any more data */
5137 while ((data
= readchar (0)) >= 0)
5139 /* Check for the escape sequence */
5142 /* If this is the fourth escape, get out */
5143 if (++escape_count
== 4)
5148 { /* This is a '|', but not the fourth in a row.
5149 Continue without echoing it. If it isn't actually
5150 one of four in a row, it'll be echoed later. */
5157 /* Ensure any pending '|'s are flushed. */
5159 for (; escape_count
> 0; escape_count
--)
5163 if (data
== '\r') /* If this is a return character, */
5164 continue; /* - just supress it. */
5166 if (echo_check
!= -1) /* Check for echo of user input. */
5168 if (tty_input
[echo_check
] == data
)
5170 echo_check
++; /* Character matched user input: */
5171 continue; /* Continue without echoing it. */
5173 else if ((data
== '\n') && (tty_input
[echo_check
] == '\r'))
5174 { /* End of the line (and of echo checking). */
5175 echo_check
= -1; /* No more echo supression */
5176 continue; /* Continue without echoing. */
5179 { /* Failed check for echo of user input.
5180 We now have some suppressed output to flush! */
5183 for (j
= 0; j
< echo_check
; j
++)
5184 putchar (tty_input
[j
]);
5188 putchar (data
); /* Default case: output the char. */
5191 if (data
== SERIAL_TIMEOUT
) /* Timeout returned from readchar. */
5192 return READ_MORE
; /* Try to read some more */
5194 return FATAL_ERROR
; /* Trouble, bail out */
5202 /* First, read a buffer full from the terminal */
5203 tty_bytecount
= read (fileno (stdin
), tty_input
, sizeof (tty_input
) - 1);
5204 if (tty_bytecount
== -1)
5206 perror ("readtty: read failed");
5210 /* Remove a quoted newline. */
5211 if (tty_input
[tty_bytecount
- 1] == '\n' &&
5212 tty_input
[tty_bytecount
- 2] == '\\') /* line ending in backslash */
5214 tty_input
[--tty_bytecount
] = 0; /* remove newline */
5215 tty_input
[--tty_bytecount
] = 0; /* remove backslash */
5218 /* Turn trailing newlines into returns */
5219 if (tty_input
[tty_bytecount
- 1] == '\n')
5220 tty_input
[tty_bytecount
- 1] = '\r';
5222 /* If the line consists of a ~, enter debugging mode. */
5223 if ((tty_input
[0] == '~') && (tty_bytecount
== 2))
5226 /* Make this a zero terminated string and write it out */
5227 tty_input
[tty_bytecount
] = 0;
5228 if (SERIAL_WRITE (remote_desc
, tty_input
, tty_bytecount
))
5230 perror_with_name ("readtty: write failed");
5240 fd_set input
; /* file descriptors for select */
5241 int tablesize
; /* max number of FDs for select */
5245 extern int escape_count
; /* global shared by readsocket */
5246 extern int echo_check
; /* ditto */
5251 tablesize
= 8 * sizeof (input
);
5255 /* Check for anything from our socket - doesn't block. Note that
5256 this must be done *before* the select as there may be
5257 buffered I/O waiting to be processed. */
5259 if ((status
= readsocket ()) == FATAL_ERROR
)
5261 error ("Debugging terminated by communications error");
5263 else if (status
!= READ_MORE
)
5268 fflush (stdout
); /* Flush output before blocking */
5270 /* Now block on more socket input or TTY input */
5273 FD_SET (fileno (stdin
), &input
);
5274 FD_SET (DEPRECATED_SERIAL_FD (remote_desc
), &input
);
5276 status
= select (tablesize
, &input
, 0, 0, 0);
5277 if ((status
== -1) && (errno
!= EINTR
))
5279 error ("Communications error on select %d", errno
);
5282 /* Handle Control-C typed */
5286 if ((++quit_count
) == 2)
5288 if (query ("Interrupt GDB? "))
5290 printf_filtered ("Interrupted by user.\n");
5291 return_to_top_level (RETURN_QUIT
);
5298 SERIAL_SEND_BREAK (remote_desc
);
5300 SERIAL_WRITE (remote_desc
, "\003", 1);
5305 /* Handle console input */
5307 if (FD_ISSET (fileno (stdin
), &input
))
5311 status
= readtty ();
5312 if (status
== READ_MORE
)
5315 return status
; /* telnet session ended */
5321 remote_cisco_wait (int pid
, struct target_waitstatus
*status
)
5323 if (minitelnet () != ENTER_DEBUG
)
5325 error ("Debugging session terminated by protocol error");
5328 return remote_wait (pid
, status
);
5332 init_remote_cisco_ops (void)
5334 remote_cisco_ops
.to_shortname
= "cisco";
5335 remote_cisco_ops
.to_longname
= "Remote serial target in cisco-specific protocol";
5336 remote_cisco_ops
.to_doc
=
5337 "Use a remote machine via TCP, using a cisco-specific protocol.\n\
5338 Specify the serial device it is connected to (e.g. host:2020).";
5339 remote_cisco_ops
.to_open
= remote_cisco_open
;
5340 remote_cisco_ops
.to_close
= remote_cisco_close
;
5341 remote_cisco_ops
.to_detach
= remote_detach
;
5342 remote_cisco_ops
.to_resume
= remote_resume
;
5343 remote_cisco_ops
.to_wait
= remote_cisco_wait
;
5344 remote_cisco_ops
.to_fetch_registers
= remote_fetch_registers
;
5345 remote_cisco_ops
.to_store_registers
= remote_store_registers
;
5346 remote_cisco_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5347 remote_cisco_ops
.to_xfer_memory
= remote_xfer_memory
;
5348 remote_cisco_ops
.to_files_info
= remote_files_info
;
5349 remote_cisco_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5350 remote_cisco_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5351 remote_cisco_ops
.to_kill
= remote_kill
;
5352 remote_cisco_ops
.to_load
= generic_load
;
5353 remote_cisco_ops
.to_mourn_inferior
= remote_cisco_mourn
;
5354 remote_cisco_ops
.to_thread_alive
= remote_thread_alive
;
5355 remote_cisco_ops
.to_find_new_threads
= remote_threads_info
;
5356 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5357 remote_cisco_ops
.to_stratum
= process_stratum
;
5358 remote_cisco_ops
.to_has_all_memory
= 1;
5359 remote_cisco_ops
.to_has_memory
= 1;
5360 remote_cisco_ops
.to_has_stack
= 1;
5361 remote_cisco_ops
.to_has_registers
= 1;
5362 remote_cisco_ops
.to_has_execution
= 1;
5363 remote_cisco_ops
.to_magic
= OPS_MAGIC
;
5367 remote_can_async_p (void)
5369 /* We're async whenever the serial device is. */
5370 return (current_target
.to_async_mask_value
) && SERIAL_CAN_ASYNC_P (remote_desc
);
5374 remote_is_async_p (void)
5376 /* We're async whenever the serial device is. */
5377 return (current_target
.to_async_mask_value
) && SERIAL_IS_ASYNC_P (remote_desc
);
5380 /* Pass the SERIAL event on and up to the client. One day this code
5381 will be able to delay notifying the client of an event until the
5382 point where an entire packet has been received. */
5384 static void (*async_client_callback
) (enum inferior_event_type event_type
, void *context
);
5385 static void *async_client_context
;
5386 static serial_event_ftype remote_async_serial_handler
;
5389 remote_async_serial_handler (serial_t scb
, void *context
)
5391 /* Don't propogate error information up to the client. Instead let
5392 the client find out about the error by querying the target. */
5393 async_client_callback (INF_REG_EVENT
, async_client_context
);
5397 remote_async (void (*callback
) (enum inferior_event_type event_type
, void *context
), void *context
)
5399 if (current_target
.to_async_mask_value
== 0)
5400 internal_error ("Calling remote_async when async is masked");
5402 if (callback
!= NULL
)
5404 SERIAL_ASYNC (remote_desc
, remote_async_serial_handler
, NULL
);
5405 async_client_callback
= callback
;
5406 async_client_context
= context
;
5409 SERIAL_ASYNC (remote_desc
, NULL
, NULL
);
5412 /* Target async and target extended-async.
5414 This are temporary targets, until it is all tested. Eventually
5415 async support will be incorporated int the usual 'remote'
5419 init_remote_async_ops (void)
5421 remote_async_ops
.to_shortname
= "async";
5422 remote_async_ops
.to_longname
= "Remote serial target in async version of the gdb-specific protocol";
5423 remote_async_ops
.to_doc
=
5424 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5425 Specify the serial device it is connected to (e.g. /dev/ttya).";
5426 remote_async_ops
.to_open
= remote_async_open
;
5427 remote_async_ops
.to_close
= remote_close
;
5428 remote_async_ops
.to_detach
= remote_async_detach
;
5429 remote_async_ops
.to_resume
= remote_async_resume
;
5430 remote_async_ops
.to_wait
= remote_async_wait
;
5431 remote_async_ops
.to_fetch_registers
= remote_fetch_registers
;
5432 remote_async_ops
.to_store_registers
= remote_store_registers
;
5433 remote_async_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5434 remote_async_ops
.to_xfer_memory
= remote_xfer_memory
;
5435 remote_async_ops
.to_files_info
= remote_files_info
;
5436 remote_async_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5437 remote_async_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5438 remote_async_ops
.to_terminal_inferior
= remote_async_terminal_inferior
;
5439 remote_async_ops
.to_terminal_ours
= remote_async_terminal_ours
;
5440 remote_async_ops
.to_kill
= remote_async_kill
;
5441 remote_async_ops
.to_load
= generic_load
;
5442 remote_async_ops
.to_mourn_inferior
= remote_async_mourn
;
5443 remote_async_ops
.to_thread_alive
= remote_thread_alive
;
5444 remote_async_ops
.to_find_new_threads
= remote_threads_info
;
5445 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5446 remote_async_ops
.to_stop
= remote_stop
;
5447 remote_async_ops
.to_query
= remote_query
;
5448 remote_async_ops
.to_rcmd
= remote_rcmd
;
5449 remote_async_ops
.to_stratum
= process_stratum
;
5450 remote_async_ops
.to_has_all_memory
= 1;
5451 remote_async_ops
.to_has_memory
= 1;
5452 remote_async_ops
.to_has_stack
= 1;
5453 remote_async_ops
.to_has_registers
= 1;
5454 remote_async_ops
.to_has_execution
= 1;
5455 remote_async_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
5456 remote_async_ops
.to_can_async_p
= remote_can_async_p
;
5457 remote_async_ops
.to_is_async_p
= remote_is_async_p
;
5458 remote_async_ops
.to_async
= remote_async
;
5459 remote_async_ops
.to_async_mask_value
= 1;
5460 remote_async_ops
.to_magic
= OPS_MAGIC
;
5463 /* Set up the async extended remote vector by making a copy of the standard
5464 remote vector and adding to it. */
5467 init_extended_async_remote_ops (void)
5469 extended_async_remote_ops
= remote_async_ops
;
5471 extended_async_remote_ops
.to_shortname
= "extended-async";
5472 extended_async_remote_ops
.to_longname
=
5473 "Extended remote serial target in async gdb-specific protocol";
5474 extended_async_remote_ops
.to_doc
=
5475 "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
5476 Specify the serial device it is connected to (e.g. /dev/ttya).",
5477 extended_async_remote_ops
.to_open
= extended_remote_async_open
;
5478 extended_async_remote_ops
.to_create_inferior
= extended_remote_async_create_inferior
;
5479 extended_async_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
5483 set_remote_cmd (char *args
, int from_tty
)
5489 show_remote_cmd (char *args
, int from_tty
)
5491 show_remote_protocol_Z_packet_cmd (args
, from_tty
);
5492 show_remote_protocol_P_packet_cmd (args
, from_tty
);
5493 show_remote_protocol_binary_download_cmd (args
, from_tty
);
5497 build_remote_gdbarch_data (void)
5499 build_remote_packet_sizes ();
5502 tty_input
= xmalloc (PBUFSIZ
);
5503 remote_address_size
= TARGET_PTR_BIT
;
5507 _initialize_remote (void)
5509 static struct cmd_list_element
*remote_set_cmdlist
;
5510 static struct cmd_list_element
*remote_show_cmdlist
;
5511 struct cmd_list_element
*tmpcmd
;
5513 /* architecture specific data */
5514 build_remote_gdbarch_data ();
5515 register_gdbarch_swap (&tty_input
, sizeof (&tty_input
), NULL
);
5516 register_remote_packet_sizes ();
5517 register_gdbarch_swap (&remote_address_size
,
5518 sizeof (&remote_address_size
), NULL
);
5519 register_gdbarch_swap (NULL
, 0, build_remote_gdbarch_data
);
5522 add_target (&remote_ops
);
5524 init_extended_remote_ops ();
5525 add_target (&extended_remote_ops
);
5527 init_remote_async_ops ();
5528 add_target (&remote_async_ops
);
5530 init_extended_async_remote_ops ();
5531 add_target (&extended_async_remote_ops
);
5533 init_remote_cisco_ops ();
5534 add_target (&remote_cisco_ops
);
5537 init_remote_threadtests ();
5540 /* set/show remote ... */
5542 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, "\
5543 Remote protocol specific variables\n\
5544 Configure various remote-protocol specific variables such as\n\
5545 the packets being used",
5546 &remote_set_cmdlist
, "set remote ",
5547 0/*allow-unknown*/, &setlist
);
5548 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, "\
5549 Remote protocol specific variables\n\
5550 Configure various remote-protocol specific variables such as\n\
5551 the packets being used",
5552 &remote_show_cmdlist
, "show remote ",
5553 0/*allow-unknown*/, &showlist
);
5555 add_cmd ("compare-sections", class_obscure
, compare_sections_command
,
5556 "Compare section data on target to the exec file.\n\
5557 Argument is a single section name (default: all loaded sections).",
5560 add_cmd ("packet", class_maintenance
, packet_command
,
5561 "Send an arbitrary packet to a remote target.\n\
5562 maintenance packet TEXT\n\
5563 If GDB is talking to an inferior via the GDB serial protocol, then\n\
5564 this command sends the string TEXT to the inferior, and displays the\n\
5565 response packet. GDB supplies the initial `$' character, and the\n\
5566 terminating `#' character and checksum.",
5570 (add_set_cmd ("remotebreak", no_class
,
5571 var_boolean
, (char *) &remote_break
,
5572 "Set whether to send break if interrupted.\n",
5576 /* Install commands for configuring memory read/write packets. */
5578 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
,
5579 "Set the maximum number of bytes per memory write packet (deprecated).\n",
5581 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
,
5582 "Show the maximum number of bytes per memory write packet (deprecated).\n",
5584 add_cmd ("memory-write-packet-size", no_class
,
5585 set_memory_write_packet_size
,
5586 "Set the maximum number of bytes per memory-write packet.\n"
5587 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5588 "default packet size. The actual limit is further reduced\n"
5589 "dependent on the target. Specify ``fixed'' to disable the\n"
5590 "further restriction and ``limit'' to enable that restriction\n",
5591 &remote_set_cmdlist
);
5592 add_cmd ("memory-read-packet-size", no_class
,
5593 set_memory_read_packet_size
,
5594 "Set the maximum number of bytes per memory-read packet.\n"
5595 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5596 "default packet size. The actual limit is further reduced\n"
5597 "dependent on the target. Specify ``fixed'' to disable the\n"
5598 "further restriction and ``limit'' to enable that restriction\n",
5599 &remote_set_cmdlist
);
5600 add_cmd ("memory-write-packet-size", no_class
,
5601 show_memory_write_packet_size
,
5602 "Show the maximum number of bytes per memory-write packet.\n",
5603 &remote_show_cmdlist
);
5604 add_cmd ("memory-read-packet-size", no_class
,
5605 show_memory_read_packet_size
,
5606 "Show the maximum number of bytes per memory-read packet.\n",
5607 &remote_show_cmdlist
);
5610 (add_set_cmd ("remoteaddresssize", class_obscure
,
5611 var_integer
, (char *) &remote_address_size
,
5612 "Set the maximum size of the address (in bits) \
5613 in a memory packet.\n",
5617 add_packet_config_cmd (&remote_protocol_binary_download
,
5618 "X", "binary-download",
5619 set_remote_protocol_binary_download_cmd
,
5620 show_remote_protocol_binary_download_cmd
,
5621 &remote_set_cmdlist
, &remote_show_cmdlist
,
5624 /* XXXX - should ``set remotebinarydownload'' be retained for
5627 (add_set_cmd ("remotebinarydownload", no_class
,
5628 var_boolean
, (char *) &remote_binary_download
,
5629 "Set binary downloads.\n", &setlist
),
5633 add_info ("remote-process", remote_info_process
,
5634 "Query the remote system for process info.");
5636 add_packet_config_cmd (&remote_protocol_P
,
5637 "P", "set-register",
5638 set_remote_protocol_P_packet_cmd
,
5639 show_remote_protocol_P_packet_cmd
,
5640 &remote_set_cmdlist
, &remote_show_cmdlist
,
5643 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
],
5644 "Z0", "software-breakpoint",
5645 set_remote_protocol_Z_software_bp_packet_cmd
,
5646 show_remote_protocol_Z_software_bp_packet_cmd
,
5647 &remote_set_cmdlist
, &remote_show_cmdlist
,
5650 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
],
5651 "Z1", "hardware-breakpoint",
5652 set_remote_protocol_Z_hardware_bp_packet_cmd
,
5653 show_remote_protocol_Z_hardware_bp_packet_cmd
,
5654 &remote_set_cmdlist
, &remote_show_cmdlist
,
5657 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_WRITE_WP
],
5658 "Z2", "write-watchpoint",
5659 set_remote_protocol_Z_write_wp_packet_cmd
,
5660 show_remote_protocol_Z_write_wp_packet_cmd
,
5661 &remote_set_cmdlist
, &remote_show_cmdlist
,
5664 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_READ_WP
],
5665 "Z3", "read-watchpoint",
5666 set_remote_protocol_Z_read_wp_packet_cmd
,
5667 show_remote_protocol_Z_read_wp_packet_cmd
,
5668 &remote_set_cmdlist
, &remote_show_cmdlist
,
5671 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
],
5672 "Z4", "access-watchpoint",
5673 set_remote_protocol_Z_access_wp_packet_cmd
,
5674 show_remote_protocol_Z_access_wp_packet_cmd
,
5675 &remote_set_cmdlist
, &remote_show_cmdlist
,
5678 /* Keep the old ``set remote Z-packet ...'' working. */
5679 tmpcmd
= add_set_auto_boolean_cmd ("Z-packet", class_obscure
,
5680 &remote_Z_packet_detect
,
5682 Set use of remote protocol `Z' packets", &remote_set_cmdlist
);
5683 tmpcmd
->function
.sfunc
= set_remote_protocol_Z_packet_cmd
;
5684 add_cmd ("Z-packet", class_obscure
, show_remote_protocol_Z_packet_cmd
,
5685 "Show use of remote protocol `Z' packets ",
5686 &remote_show_cmdlist
);