File: | src/gnu/usr.bin/binutils/gdb/remote.c |
Warning: | line 4145, column 3 Value stored to 'timed_out' is never read |
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1 | /* Remote target communications for serial-line targets in custom GDB protocol |
2 | |
3 | Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, |
4 | 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 |
5 | Free Software Foundation, Inc. |
6 | |
7 | This file is part of GDB. |
8 | |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by |
11 | the Free Software Foundation; either version 2 of the License, or |
12 | (at your option) any later version. |
13 | |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
17 | GNU General Public License for more details. |
18 | |
19 | You should have received a copy of the GNU General Public License |
20 | along with this program; if not, write to the Free Software |
21 | Foundation, Inc., 59 Temple Place - Suite 330, |
22 | Boston, MA 02111-1307, USA. */ |
23 | |
24 | /* See the GDB User Guide for details of the GDB remote protocol. */ |
25 | |
26 | #include "defs.h" |
27 | #include "gdb_string.h" |
28 | #include <ctype.h> |
29 | #include <fcntl.h> |
30 | #include "inferior.h" |
31 | #include "bfd.h" |
32 | #include "symfile.h" |
33 | #include "target.h" |
34 | /*#include "terminal.h" */ |
35 | #include "gdbcmd.h" |
36 | #include "objfiles.h" |
37 | #include "gdb-stabs.h" |
38 | #include "gdbthread.h" |
39 | #include "remote.h" |
40 | #include "regcache.h" |
41 | #include "value.h" |
42 | #include "gdb_assert.h" |
43 | |
44 | #include <ctype.h> |
45 | #include <sys/time.h> |
46 | |
47 | #include "event-loop.h" |
48 | #include "event-top.h" |
49 | #include "inf-loop.h" |
50 | |
51 | #include <signal.h> |
52 | #include "serial.h" |
53 | |
54 | #include "gdbcore.h" /* for exec_bfd */ |
55 | |
56 | #include "remote-fileio.h" |
57 | |
58 | /* Prototypes for local functions */ |
59 | static void cleanup_sigint_signal_handler (void *dummy); |
60 | static void initialize_sigint_signal_handler (void); |
61 | static int getpkt_sane (char *buf, long sizeof_buf, int forever); |
62 | |
63 | static void handle_remote_sigint (int); |
64 | static void handle_remote_sigint_twice (int); |
65 | static void async_remote_interrupt (gdb_client_data); |
66 | void async_remote_interrupt_twice (gdb_client_data); |
67 | |
68 | static void build_remote_gdbarch_data (void); |
69 | |
70 | static void remote_files_info (struct target_ops *ignore); |
71 | |
72 | static int remote_xfer_memory (CORE_ADDR memaddr, char *myaddr, |
73 | int len, int should_write, |
74 | struct mem_attrib *attrib, |
75 | struct target_ops *target); |
76 | |
77 | static void remote_prepare_to_store (void); |
78 | |
79 | static void remote_fetch_registers (int regno); |
80 | |
81 | static void remote_resume (ptid_t ptid, int step, |
82 | enum target_signal siggnal); |
83 | static void remote_async_resume (ptid_t ptid, int step, |
84 | enum target_signal siggnal); |
85 | static int remote_start_remote (struct ui_out *uiout, void *dummy); |
86 | |
87 | static void remote_open (char *name, int from_tty); |
88 | static void remote_async_open (char *name, int from_tty); |
89 | |
90 | static void extended_remote_open (char *name, int from_tty); |
91 | static void extended_remote_async_open (char *name, int from_tty); |
92 | |
93 | static void remote_open_1 (char *, int, struct target_ops *, int extended_p, |
94 | int async_p); |
95 | |
96 | static void remote_close (int quitting); |
97 | |
98 | static void remote_store_registers (int regno); |
99 | |
100 | static void remote_mourn (void); |
101 | static void remote_async_mourn (void); |
102 | |
103 | static void extended_remote_restart (void); |
104 | |
105 | static void extended_remote_mourn (void); |
106 | |
107 | static void remote_mourn_1 (struct target_ops *); |
108 | |
109 | static void remote_send (char *buf, long sizeof_buf); |
110 | |
111 | static int readchar (int timeout); |
112 | |
113 | static ptid_t remote_wait (ptid_t ptid, |
114 | struct target_waitstatus *status); |
115 | static ptid_t remote_async_wait (ptid_t ptid, |
116 | struct target_waitstatus *status); |
117 | |
118 | static void remote_kill (void); |
119 | static void remote_async_kill (void); |
120 | |
121 | static int tohex (int nib); |
122 | |
123 | static void remote_detach (char *args, int from_tty); |
124 | |
125 | static void remote_interrupt (int signo); |
126 | |
127 | static void remote_interrupt_twice (int signo); |
128 | |
129 | static void interrupt_query (void); |
130 | |
131 | static void set_thread (int, int); |
132 | |
133 | static int remote_thread_alive (ptid_t); |
134 | |
135 | static void get_offsets (void); |
136 | |
137 | static long read_frame (char *buf, long sizeof_buf); |
138 | |
139 | static int remote_insert_breakpoint (CORE_ADDR, char *); |
140 | |
141 | static int remote_remove_breakpoint (CORE_ADDR, char *); |
142 | |
143 | static int hexnumlen (ULONGESTunsigned long num); |
144 | |
145 | static void init_remote_ops (void); |
146 | |
147 | static void init_extended_remote_ops (void); |
148 | |
149 | static void remote_stop (void); |
150 | |
151 | static int ishex (int ch, int *val); |
152 | |
153 | static int stubhex (int ch); |
154 | |
155 | static int hexnumstr (char *, ULONGESTunsigned long); |
156 | |
157 | static int hexnumnstr (char *, ULONGESTunsigned long, int); |
158 | |
159 | static CORE_ADDR remote_address_masked (CORE_ADDR); |
160 | |
161 | static void print_packet (char *); |
162 | |
163 | static unsigned long crc32 (unsigned char *, int, unsigned int); |
164 | |
165 | static void compare_sections_command (char *, int); |
166 | |
167 | static void packet_command (char *, int); |
168 | |
169 | static int stub_unpack_int (char *buff, int fieldlength); |
170 | |
171 | static ptid_t remote_current_thread (ptid_t oldptid); |
172 | |
173 | static void remote_find_new_threads (void); |
174 | |
175 | static void record_currthread (int currthread); |
176 | |
177 | static int fromhex (int a); |
178 | |
179 | static int hex2bin (const char *hex, char *bin, int count); |
180 | |
181 | static int bin2hex (const char *bin, char *hex, int count); |
182 | |
183 | static int putpkt_binary (char *buf, int cnt); |
184 | |
185 | static void check_binary_download (CORE_ADDR addr); |
186 | |
187 | struct packet_config; |
188 | |
189 | static void show_packet_config_cmd (struct packet_config *config); |
190 | |
191 | static void update_packet_config (struct packet_config *config); |
192 | |
193 | void _initialize_remote (void); |
194 | |
195 | /* Description of the remote protocol. Strictly speaking, when the |
196 | target is open()ed, remote.c should create a per-target description |
197 | of the remote protocol using that target's architecture. |
198 | Unfortunately, the target stack doesn't include local state. For |
199 | the moment keep the information in the target's architecture |
200 | object. Sigh.. */ |
201 | |
202 | struct packet_reg |
203 | { |
204 | long offset; /* Offset into G packet. */ |
205 | long regnum; /* GDB's internal register number. */ |
206 | LONGESTlong pnum; /* Remote protocol register number. */ |
207 | int in_g_packet; /* Always part of G packet. */ |
208 | /* long size in bytes; == register_size (current_gdbarch, regnum); at present. */ |
209 | /* char *name; == REGISTER_NAME (regnum); at present. */ |
210 | }; |
211 | |
212 | struct remote_state |
213 | { |
214 | /* Description of the remote protocol registers. */ |
215 | long sizeof_g_packet; |
216 | |
217 | /* Description of the remote protocol registers indexed by REGNUM |
218 | (making an array of NUM_REGS + NUM_PSEUDO_REGS in size). */ |
219 | struct packet_reg *regs; |
220 | |
221 | /* This is the size (in chars) of the first response to the ``g'' |
222 | packet. It is used as a heuristic when determining the maximum |
223 | size of memory-read and memory-write packets. A target will |
224 | typically only reserve a buffer large enough to hold the ``g'' |
225 | packet. The size does not include packet overhead (headers and |
226 | trailers). */ |
227 | long actual_register_packet_size; |
228 | |
229 | /* This is the maximum size (in chars) of a non read/write packet. |
230 | It is also used as a cap on the size of read/write packets. */ |
231 | long remote_packet_size; |
232 | }; |
233 | |
234 | |
235 | /* Handle for retreving the remote protocol data from gdbarch. */ |
236 | static struct gdbarch_data *remote_gdbarch_data_handle; |
237 | |
238 | static struct remote_state * |
239 | get_remote_state (void) |
240 | { |
241 | return gdbarch_data (current_gdbarch, remote_gdbarch_data_handle); |
242 | } |
243 | |
244 | static void * |
245 | init_remote_state (struct gdbarch *gdbarch) |
246 | { |
247 | int regnum; |
248 | struct remote_state *rs = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct remote_state)((struct remote_state *) gdbarch_obstack_zalloc ((gdbarch), sizeof (struct remote_state))); |
249 | |
250 | if (deprecated_register_bytes () != 0) |
251 | rs->sizeof_g_packet = deprecated_register_bytes (); |
252 | else |
253 | rs->sizeof_g_packet = 0; |
254 | |
255 | /* Assume a 1:1 regnum<->pnum table. */ |
256 | rs->regs = GDBARCH_OBSTACK_CALLOC (gdbarch, NUM_REGS + NUM_PSEUDO_REGS,((struct packet_reg *) gdbarch_obstack_zalloc ((gdbarch), ((gdbarch_num_regs (current_gdbarch)) + (gdbarch_num_pseudo_regs (current_gdbarch ))) * sizeof (struct packet_reg))) |
257 | struct packet_reg)((struct packet_reg *) gdbarch_obstack_zalloc ((gdbarch), ((gdbarch_num_regs (current_gdbarch)) + (gdbarch_num_pseudo_regs (current_gdbarch ))) * sizeof (struct packet_reg))); |
258 | for (regnum = 0; regnum < NUM_REGS(gdbarch_num_regs (current_gdbarch)) + NUM_PSEUDO_REGS(gdbarch_num_pseudo_regs (current_gdbarch)); regnum++) |
259 | { |
260 | struct packet_reg *r = &rs->regs[regnum]; |
261 | r->pnum = regnum; |
262 | r->regnum = regnum; |
263 | r->offset = DEPRECATED_REGISTER_BYTE (regnum)(gdbarch_deprecated_register_byte (current_gdbarch, regnum)); |
264 | r->in_g_packet = (regnum < NUM_REGS(gdbarch_num_regs (current_gdbarch))); |
265 | /* ...name = REGISTER_NAME (regnum); */ |
266 | |
267 | /* Compute packet size by accumulating the size of all registers. */ |
268 | if (deprecated_register_bytes () == 0) |
269 | rs->sizeof_g_packet += register_size (current_gdbarch, regnum); |
270 | } |
271 | |
272 | /* Default maximum number of characters in a packet body. Many |
273 | remote stubs have a hardwired buffer size of 400 bytes |
274 | (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used |
275 | as the maximum packet-size to ensure that the packet and an extra |
276 | NUL character can always fit in the buffer. This stops GDB |
277 | trashing stubs that try to squeeze an extra NUL into what is |
278 | already a full buffer (As of 1999-12-04 that was most stubs. */ |
279 | rs->remote_packet_size = 400 - 1; |
280 | |
281 | /* Should rs->sizeof_g_packet needs more space than the |
282 | default, adjust the size accordingly. Remember that each byte is |
283 | encoded as two characters. 32 is the overhead for the packet |
284 | header / footer. NOTE: cagney/1999-10-26: I suspect that 8 |
285 | (``$NN:G...#NN'') is a better guess, the below has been padded a |
286 | little. */ |
287 | if (rs->sizeof_g_packet > ((rs->remote_packet_size - 32) / 2)) |
288 | rs->remote_packet_size = (rs->sizeof_g_packet * 2 + 32); |
289 | |
290 | /* This one is filled in when a ``g'' packet is received. */ |
291 | rs->actual_register_packet_size = 0; |
292 | |
293 | return rs; |
294 | } |
295 | |
296 | static struct packet_reg * |
297 | packet_reg_from_regnum (struct remote_state *rs, long regnum) |
298 | { |
299 | if (regnum < 0 && regnum >= NUM_REGS(gdbarch_num_regs (current_gdbarch)) + NUM_PSEUDO_REGS(gdbarch_num_pseudo_regs (current_gdbarch))) |
300 | return NULL((void*)0); |
301 | else |
302 | { |
303 | struct packet_reg *r = &rs->regs[regnum]; |
304 | gdb_assert (r->regnum == regnum)((void) ((r->regnum == regnum) ? 0 : (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/remote.c" , 304, "%s: Assertion `%s' failed.", __PRETTY_FUNCTION__, "r->regnum == regnum" ), 0))); |
305 | return r; |
306 | } |
307 | } |
308 | |
309 | static struct packet_reg * |
310 | packet_reg_from_pnum (struct remote_state *rs, LONGESTlong pnum) |
311 | { |
312 | int i; |
313 | for (i = 0; i < NUM_REGS(gdbarch_num_regs (current_gdbarch)) + NUM_PSEUDO_REGS(gdbarch_num_pseudo_regs (current_gdbarch)); i++) |
314 | { |
315 | struct packet_reg *r = &rs->regs[i]; |
316 | if (r->pnum == pnum) |
317 | return r; |
318 | } |
319 | return NULL((void*)0); |
320 | } |
321 | |
322 | /* FIXME: graces/2002-08-08: These variables should eventually be |
323 | bound to an instance of the target object (as in gdbarch-tdep()), |
324 | when such a thing exists. */ |
325 | |
326 | /* This is set to the data address of the access causing the target |
327 | to stop for a watchpoint. */ |
328 | static CORE_ADDR remote_watch_data_address; |
329 | |
330 | /* This is non-zero if taregt stopped for a watchpoint. */ |
331 | static int remote_stopped_by_watchpoint_p; |
332 | |
333 | |
334 | static struct target_ops remote_ops; |
335 | |
336 | static struct target_ops extended_remote_ops; |
337 | |
338 | /* Temporary target ops. Just like the remote_ops and |
339 | extended_remote_ops, but with asynchronous support. */ |
340 | static struct target_ops remote_async_ops; |
341 | |
342 | static struct target_ops extended_async_remote_ops; |
343 | |
344 | /* FIXME: cagney/1999-09-23: Even though getpkt was called with |
345 | ``forever'' still use the normal timeout mechanism. This is |
346 | currently used by the ASYNC code to guarentee that target reads |
347 | during the initial connect always time-out. Once getpkt has been |
348 | modified to return a timeout indication and, in turn |
349 | remote_wait()/wait_for_inferior() have gained a timeout parameter |
350 | this can go away. */ |
351 | static int wait_forever_enabled_p = 1; |
352 | |
353 | |
354 | /* This variable chooses whether to send a ^C or a break when the user |
355 | requests program interruption. Although ^C is usually what remote |
356 | systems expect, and that is the default here, sometimes a break is |
357 | preferable instead. */ |
358 | |
359 | static int remote_break; |
360 | |
361 | /* Descriptor for I/O to remote machine. Initialize it to NULL so that |
362 | remote_open knows that we don't have a file open when the program |
363 | starts. */ |
364 | static struct serial *remote_desc = NULL((void*)0); |
365 | |
366 | /* This variable sets the number of bits in an address that are to be |
367 | sent in a memory ("M" or "m") packet. Normally, after stripping |
368 | leading zeros, the entire address would be sent. This variable |
369 | restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The |
370 | initial implementation of remote.c restricted the address sent in |
371 | memory packets to ``host::sizeof long'' bytes - (typically 32 |
372 | bits). Consequently, for 64 bit targets, the upper 32 bits of an |
373 | address was never sent. Since fixing this bug may cause a break in |
374 | some remote targets this variable is principly provided to |
375 | facilitate backward compatibility. */ |
376 | |
377 | static int remote_address_size; |
378 | |
379 | /* Tempoary to track who currently owns the terminal. See |
380 | target_async_terminal_* for more details. */ |
381 | |
382 | static int remote_async_terminal_ours_p; |
383 | |
384 | |
385 | /* User configurable variables for the number of characters in a |
386 | memory read/write packet. MIN ((rs->remote_packet_size), |
387 | rs->sizeof_g_packet) is the default. Some targets need smaller |
388 | values (fifo overruns, et.al.) and some users need larger values |
389 | (speed up transfers). The variables ``preferred_*'' (the user |
390 | request), ``current_*'' (what was actually set) and ``forced_*'' |
391 | (Positive - a soft limit, negative - a hard limit). */ |
392 | |
393 | struct memory_packet_config |
394 | { |
395 | char *name; |
396 | long size; |
397 | int fixed_p; |
398 | }; |
399 | |
400 | /* Compute the current size of a read/write packet. Since this makes |
401 | use of ``actual_register_packet_size'' the computation is dynamic. */ |
402 | |
403 | static long |
404 | get_memory_packet_size (struct memory_packet_config *config) |
405 | { |
406 | struct remote_state *rs = get_remote_state (); |
407 | /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk |
408 | law?) that some hosts don't cope very well with large alloca() |
409 | calls. Eventually the alloca() code will be replaced by calls to |
410 | xmalloc() and make_cleanups() allowing this restriction to either |
411 | be lifted or removed. */ |
412 | #ifndef MAX_REMOTE_PACKET_SIZE16384 |
413 | #define MAX_REMOTE_PACKET_SIZE16384 16384 |
414 | #endif |
415 | /* NOTE: 16 is just chosen at random. */ |
416 | #ifndef MIN_REMOTE_PACKET_SIZE16 |
417 | #define MIN_REMOTE_PACKET_SIZE16 16 |
418 | #endif |
419 | long what_they_get; |
420 | if (config->fixed_p) |
421 | { |
422 | if (config->size <= 0) |
423 | what_they_get = MAX_REMOTE_PACKET_SIZE16384; |
424 | else |
425 | what_they_get = config->size; |
426 | } |
427 | else |
428 | { |
429 | what_they_get = (rs->remote_packet_size); |
430 | /* Limit the packet to the size specified by the user. */ |
431 | if (config->size > 0 |
432 | && what_they_get > config->size) |
433 | what_they_get = config->size; |
434 | /* Limit it to the size of the targets ``g'' response. */ |
435 | if ((rs->actual_register_packet_size) > 0 |
436 | && what_they_get > (rs->actual_register_packet_size)) |
437 | what_they_get = (rs->actual_register_packet_size); |
438 | } |
439 | if (what_they_get > MAX_REMOTE_PACKET_SIZE16384) |
440 | what_they_get = MAX_REMOTE_PACKET_SIZE16384; |
441 | if (what_they_get < MIN_REMOTE_PACKET_SIZE16) |
442 | what_they_get = MIN_REMOTE_PACKET_SIZE16; |
443 | return what_they_get; |
444 | } |
445 | |
446 | /* Update the size of a read/write packet. If they user wants |
447 | something really big then do a sanity check. */ |
448 | |
449 | static void |
450 | set_memory_packet_size (char *args, struct memory_packet_config *config) |
451 | { |
452 | int fixed_p = config->fixed_p; |
453 | long size = config->size; |
454 | if (args == NULL((void*)0)) |
455 | error ("Argument required (integer, `fixed' or `limited')."); |
456 | else if (strcmp (args, "hard") == 0 |
457 | || strcmp (args, "fixed") == 0) |
458 | fixed_p = 1; |
459 | else if (strcmp (args, "soft") == 0 |
460 | || strcmp (args, "limit") == 0) |
461 | fixed_p = 0; |
462 | else |
463 | { |
464 | char *end; |
465 | size = strtoul (args, &end, 0); |
466 | if (args == end) |
467 | error ("Invalid %s (bad syntax).", config->name); |
468 | #if 0 |
469 | /* Instead of explicitly capping the size of a packet to |
470 | MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is |
471 | instead allowed to set the size to something arbitrarily |
472 | large. */ |
473 | if (size > MAX_REMOTE_PACKET_SIZE16384) |
474 | error ("Invalid %s (too large).", config->name); |
475 | #endif |
476 | } |
477 | /* Extra checks? */ |
478 | if (fixed_p && !config->fixed_p) |
479 | { |
480 | if (! query ("The target may not be able to correctly handle a %s\n" |
481 | "of %ld bytes. Change the packet size? ", |
482 | config->name, size)) |
483 | error ("Packet size not changed."); |
484 | } |
485 | /* Update the config. */ |
486 | config->fixed_p = fixed_p; |
487 | config->size = size; |
488 | } |
489 | |
490 | static void |
491 | show_memory_packet_size (struct memory_packet_config *config) |
492 | { |
493 | printf_filtered ("The %s is %ld. ", config->name, config->size); |
494 | if (config->fixed_p) |
495 | printf_filtered ("Packets are fixed at %ld bytes.\n", |
496 | get_memory_packet_size (config)); |
497 | else |
498 | printf_filtered ("Packets are limited to %ld bytes.\n", |
499 | get_memory_packet_size (config)); |
500 | } |
501 | |
502 | static struct memory_packet_config memory_write_packet_config = |
503 | { |
504 | "memory-write-packet-size", |
505 | }; |
506 | |
507 | static void |
508 | set_memory_write_packet_size (char *args, int from_tty) |
509 | { |
510 | set_memory_packet_size (args, &memory_write_packet_config); |
511 | } |
512 | |
513 | static void |
514 | show_memory_write_packet_size (char *args, int from_tty) |
515 | { |
516 | show_memory_packet_size (&memory_write_packet_config); |
517 | } |
518 | |
519 | static long |
520 | get_memory_write_packet_size (void) |
521 | { |
522 | return get_memory_packet_size (&memory_write_packet_config); |
523 | } |
524 | |
525 | static struct memory_packet_config memory_read_packet_config = |
526 | { |
527 | "memory-read-packet-size", |
528 | }; |
529 | |
530 | static void |
531 | set_memory_read_packet_size (char *args, int from_tty) |
532 | { |
533 | set_memory_packet_size (args, &memory_read_packet_config); |
534 | } |
535 | |
536 | static void |
537 | show_memory_read_packet_size (char *args, int from_tty) |
538 | { |
539 | show_memory_packet_size (&memory_read_packet_config); |
540 | } |
541 | |
542 | static long |
543 | get_memory_read_packet_size (void) |
544 | { |
545 | struct remote_state *rs = get_remote_state (); |
546 | long size = get_memory_packet_size (&memory_read_packet_config); |
547 | /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an |
548 | extra buffer size argument before the memory read size can be |
549 | increased beyond (rs->remote_packet_size). */ |
550 | if (size > (rs->remote_packet_size)) |
551 | size = (rs->remote_packet_size); |
552 | return size; |
553 | } |
554 | |
555 | |
556 | /* Generic configuration support for packets the stub optionally |
557 | supports. Allows the user to specify the use of the packet as well |
558 | as allowing GDB to auto-detect support in the remote stub. */ |
559 | |
560 | enum packet_support |
561 | { |
562 | PACKET_SUPPORT_UNKNOWN = 0, |
563 | PACKET_ENABLE, |
564 | PACKET_DISABLE |
565 | }; |
566 | |
567 | struct packet_config |
568 | { |
569 | char *name; |
570 | char *title; |
571 | enum auto_boolean detect; |
572 | enum packet_support support; |
573 | }; |
574 | |
575 | /* Analyze a packet's return value and update the packet config |
576 | accordingly. */ |
577 | |
578 | enum packet_result |
579 | { |
580 | PACKET_ERROR, |
581 | PACKET_OK, |
582 | PACKET_UNKNOWN |
583 | }; |
584 | |
585 | static void |
586 | update_packet_config (struct packet_config *config) |
587 | { |
588 | switch (config->detect) |
589 | { |
590 | case AUTO_BOOLEAN_TRUE: |
591 | config->support = PACKET_ENABLE; |
592 | break; |
593 | case AUTO_BOOLEAN_FALSE: |
594 | config->support = PACKET_DISABLE; |
595 | break; |
596 | case AUTO_BOOLEAN_AUTO: |
597 | config->support = PACKET_SUPPORT_UNKNOWN; |
598 | break; |
599 | } |
600 | } |
601 | |
602 | static void |
603 | show_packet_config_cmd (struct packet_config *config) |
604 | { |
605 | char *support = "internal-error"; |
606 | switch (config->support) |
607 | { |
608 | case PACKET_ENABLE: |
609 | support = "enabled"; |
610 | break; |
611 | case PACKET_DISABLE: |
612 | support = "disabled"; |
613 | break; |
614 | case PACKET_SUPPORT_UNKNOWN: |
615 | support = "unknown"; |
616 | break; |
617 | } |
618 | switch (config->detect) |
619 | { |
620 | case AUTO_BOOLEAN_AUTO: |
621 | printf_filtered ("Support for remote protocol `%s' (%s) packet is auto-detected, currently %s.\n", |
622 | config->name, config->title, support); |
623 | break; |
624 | case AUTO_BOOLEAN_TRUE: |
625 | case AUTO_BOOLEAN_FALSE: |
626 | printf_filtered ("Support for remote protocol `%s' (%s) packet is currently %s.\n", |
627 | config->name, config->title, support); |
628 | break; |
629 | } |
630 | } |
631 | |
632 | static void |
633 | add_packet_config_cmd (struct packet_config *config, |
634 | char *name, |
635 | char *title, |
636 | cmd_sfunc_ftype *set_func, |
637 | cmd_sfunc_ftype *show_func, |
638 | struct cmd_list_element **set_remote_list, |
639 | struct cmd_list_element **show_remote_list, |
640 | int legacy) |
641 | { |
642 | struct cmd_list_element *set_cmd; |
643 | struct cmd_list_element *show_cmd; |
644 | char *set_doc; |
645 | char *show_doc; |
646 | char *help_doc; |
647 | char *print; |
648 | char *cmd_name; |
649 | config->name = name; |
650 | config->title = title; |
651 | config->detect = AUTO_BOOLEAN_AUTO; |
652 | config->support = PACKET_SUPPORT_UNKNOWN; |
653 | set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet", |
654 | name, title); |
655 | show_doc = xstrprintf ("Show current use of remote protocol `%s' (%s) packet", |
656 | name, title); |
657 | print = xstrprintf ("Current use of remote protocol `%s' (%s) is %%s", |
658 | name, title); |
659 | /* set/show TITLE-packet {auto,on,off} */ |
660 | cmd_name = xstrprintf ("%s-packet", title); |
661 | add_setshow_auto_boolean_cmd (cmd_name, class_obscure, |
662 | &config->detect, set_doc, show_doc, |
663 | "", print, |
664 | set_func, show_func, |
665 | set_remote_list, show_remote_list); |
666 | /* set/show remote NAME-packet {auto,on,off} -- legacy */ |
667 | if (legacy) |
668 | { |
669 | char *legacy_name; |
670 | legacy_name = xstrprintf ("%s-packet", name); |
671 | add_alias_cmd (legacy_name, cmd_name, class_obscure, 0, |
672 | set_remote_list); |
673 | add_alias_cmd (legacy_name, cmd_name, class_obscure, 0, |
674 | show_remote_list); |
675 | } |
676 | } |
677 | |
678 | static enum packet_result |
679 | packet_ok (const char *buf, struct packet_config *config) |
680 | { |
681 | if (buf[0] != '\0') |
682 | { |
683 | /* The stub recognized the packet request. Check that the |
684 | operation succeeded. */ |
685 | switch (config->support) |
686 | { |
687 | case PACKET_SUPPORT_UNKNOWN: |
688 | if (remote_debug) |
689 | fprintf_unfiltered (gdb_stdlog, |
690 | "Packet %s (%s) is supported\n", |
691 | config->name, config->title); |
692 | config->support = PACKET_ENABLE; |
693 | break; |
694 | case PACKET_DISABLE: |
695 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/remote.c", __LINE__695, |
696 | "packet_ok: attempt to use a disabled packet"); |
697 | break; |
698 | case PACKET_ENABLE: |
699 | break; |
700 | } |
701 | if (buf[0] == 'O' && buf[1] == 'K' && buf[2] == '\0') |
702 | /* "OK" - definitly OK. */ |
703 | return PACKET_OK; |
704 | if (buf[0] == 'E' |
705 | && isxdigit (buf[1]) && isxdigit (buf[2]) |
706 | && buf[3] == '\0') |
707 | /* "Enn" - definitly an error. */ |
708 | return PACKET_ERROR; |
709 | /* The packet may or may not be OK. Just assume it is */ |
710 | return PACKET_OK; |
711 | } |
712 | else |
713 | { |
714 | /* The stub does not support the packet. */ |
715 | switch (config->support) |
716 | { |
717 | case PACKET_ENABLE: |
718 | if (config->detect == AUTO_BOOLEAN_AUTO) |
719 | /* If the stub previously indicated that the packet was |
720 | supported then there is a protocol error.. */ |
721 | error ("Protocol error: %s (%s) conflicting enabled responses.", |
722 | config->name, config->title); |
723 | else |
724 | /* The user set it wrong. */ |
725 | error ("Enabled packet %s (%s) not recognized by stub", |
726 | config->name, config->title); |
727 | break; |
728 | case PACKET_SUPPORT_UNKNOWN: |
729 | if (remote_debug) |
730 | fprintf_unfiltered (gdb_stdlog, |
731 | "Packet %s (%s) is NOT supported\n", |
732 | config->name, config->title); |
733 | config->support = PACKET_DISABLE; |
734 | break; |
735 | case PACKET_DISABLE: |
736 | break; |
737 | } |
738 | return PACKET_UNKNOWN; |
739 | } |
740 | } |
741 | |
742 | /* Should we try the 'vCont' (descriptive resume) request? */ |
743 | static struct packet_config remote_protocol_vcont; |
744 | |
745 | static void |
746 | set_remote_protocol_vcont_packet_cmd (char *args, int from_tty, |
747 | struct cmd_list_element *c) |
748 | { |
749 | update_packet_config (&remote_protocol_vcont); |
750 | } |
751 | |
752 | static void |
753 | show_remote_protocol_vcont_packet_cmd (char *args, int from_tty, |
754 | struct cmd_list_element *c) |
755 | { |
756 | show_packet_config_cmd (&remote_protocol_vcont); |
757 | } |
758 | |
759 | /* Should we try the 'qSymbol' (target symbol lookup service) request? */ |
760 | static struct packet_config remote_protocol_qSymbol; |
761 | |
762 | static void |
763 | set_remote_protocol_qSymbol_packet_cmd (char *args, int from_tty, |
764 | struct cmd_list_element *c) |
765 | { |
766 | update_packet_config (&remote_protocol_qSymbol); |
767 | } |
768 | |
769 | static void |
770 | show_remote_protocol_qSymbol_packet_cmd (char *args, int from_tty, |
771 | struct cmd_list_element *c) |
772 | { |
773 | show_packet_config_cmd (&remote_protocol_qSymbol); |
774 | } |
775 | |
776 | /* Should we try the 'P' (set register) request? */ |
777 | |
778 | static struct packet_config remote_protocol_P; |
779 | |
780 | static void |
781 | set_remote_protocol_P_packet_cmd (char *args, int from_tty, |
782 | struct cmd_list_element *c) |
783 | { |
784 | update_packet_config (&remote_protocol_P); |
785 | } |
786 | |
787 | static void |
788 | show_remote_protocol_P_packet_cmd (char *args, int from_tty, |
789 | struct cmd_list_element *c) |
790 | { |
791 | show_packet_config_cmd (&remote_protocol_P); |
792 | } |
793 | |
794 | /* Should we try one of the 'Z' requests? */ |
795 | |
796 | enum Z_packet_type |
797 | { |
798 | Z_PACKET_SOFTWARE_BP, |
799 | Z_PACKET_HARDWARE_BP, |
800 | Z_PACKET_WRITE_WP, |
801 | Z_PACKET_READ_WP, |
802 | Z_PACKET_ACCESS_WP, |
803 | NR_Z_PACKET_TYPES |
804 | }; |
805 | |
806 | static struct packet_config remote_protocol_Z[NR_Z_PACKET_TYPES]; |
807 | |
808 | /* FIXME: Instead of having all these boiler plate functions, the |
809 | command callback should include a context argument. */ |
810 | |
811 | static void |
812 | set_remote_protocol_Z_software_bp_packet_cmd (char *args, int from_tty, |
813 | struct cmd_list_element *c) |
814 | { |
815 | update_packet_config (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP]); |
816 | } |
817 | |
818 | static void |
819 | show_remote_protocol_Z_software_bp_packet_cmd (char *args, int from_tty, |
820 | struct cmd_list_element *c) |
821 | { |
822 | show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP]); |
823 | } |
824 | |
825 | static void |
826 | set_remote_protocol_Z_hardware_bp_packet_cmd (char *args, int from_tty, |
827 | struct cmd_list_element *c) |
828 | { |
829 | update_packet_config (&remote_protocol_Z[Z_PACKET_HARDWARE_BP]); |
830 | } |
831 | |
832 | static void |
833 | show_remote_protocol_Z_hardware_bp_packet_cmd (char *args, int from_tty, |
834 | struct cmd_list_element *c) |
835 | { |
836 | show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_HARDWARE_BP]); |
837 | } |
838 | |
839 | static void |
840 | set_remote_protocol_Z_write_wp_packet_cmd (char *args, int from_tty, |
841 | struct cmd_list_element *c) |
842 | { |
843 | update_packet_config (&remote_protocol_Z[Z_PACKET_WRITE_WP]); |
844 | } |
845 | |
846 | static void |
847 | show_remote_protocol_Z_write_wp_packet_cmd (char *args, int from_tty, |
848 | struct cmd_list_element *c) |
849 | { |
850 | show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_WRITE_WP]); |
851 | } |
852 | |
853 | static void |
854 | set_remote_protocol_Z_read_wp_packet_cmd (char *args, int from_tty, |
855 | struct cmd_list_element *c) |
856 | { |
857 | update_packet_config (&remote_protocol_Z[Z_PACKET_READ_WP]); |
858 | } |
859 | |
860 | static void |
861 | show_remote_protocol_Z_read_wp_packet_cmd (char *args, int from_tty, |
862 | struct cmd_list_element *c) |
863 | { |
864 | show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_READ_WP]); |
865 | } |
866 | |
867 | static void |
868 | set_remote_protocol_Z_access_wp_packet_cmd (char *args, int from_tty, |
869 | struct cmd_list_element *c) |
870 | { |
871 | update_packet_config (&remote_protocol_Z[Z_PACKET_ACCESS_WP]); |
872 | } |
873 | |
874 | static void |
875 | show_remote_protocol_Z_access_wp_packet_cmd (char *args, int from_tty, |
876 | struct cmd_list_element *c) |
877 | { |
878 | show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_ACCESS_WP]); |
879 | } |
880 | |
881 | /* For compatibility with older distributions. Provide a ``set remote |
882 | Z-packet ...'' command that updates all the Z packet types. */ |
883 | |
884 | static enum auto_boolean remote_Z_packet_detect; |
885 | |
886 | static void |
887 | set_remote_protocol_Z_packet_cmd (char *args, int from_tty, |
888 | struct cmd_list_element *c) |
889 | { |
890 | int i; |
891 | for (i = 0; i < NR_Z_PACKET_TYPES; i++) |
892 | { |
893 | remote_protocol_Z[i].detect = remote_Z_packet_detect; |
894 | update_packet_config (&remote_protocol_Z[i]); |
895 | } |
896 | } |
897 | |
898 | static void |
899 | show_remote_protocol_Z_packet_cmd (char *args, int from_tty, |
900 | struct cmd_list_element *c) |
901 | { |
902 | int i; |
903 | for (i = 0; i < NR_Z_PACKET_TYPES; i++) |
904 | { |
905 | show_packet_config_cmd (&remote_protocol_Z[i]); |
906 | } |
907 | } |
908 | |
909 | /* Should we try the 'X' (remote binary download) packet? |
910 | |
911 | This variable (available to the user via "set remote X-packet") |
912 | dictates whether downloads are sent in binary (via the 'X' packet). |
913 | We assume that the stub can, and attempt to do it. This will be |
914 | cleared if the stub does not understand it. This switch is still |
915 | needed, though in cases when the packet is supported in the stub, |
916 | but the connection does not allow it (i.e., 7-bit serial connection |
917 | only). */ |
918 | |
919 | static struct packet_config remote_protocol_binary_download; |
920 | |
921 | /* Should we try the 'ThreadInfo' query packet? |
922 | |
923 | This variable (NOT available to the user: auto-detect only!) |
924 | determines whether GDB will use the new, simpler "ThreadInfo" |
925 | query or the older, more complex syntax for thread queries. |
926 | This is an auto-detect variable (set to true at each connect, |
927 | and set to false when the target fails to recognize it). */ |
928 | |
929 | static int use_threadinfo_query; |
930 | static int use_threadextra_query; |
931 | |
932 | static void |
933 | set_remote_protocol_binary_download_cmd (char *args, |
934 | int from_tty, |
935 | struct cmd_list_element *c) |
936 | { |
937 | update_packet_config (&remote_protocol_binary_download); |
938 | } |
939 | |
940 | static void |
941 | show_remote_protocol_binary_download_cmd (char *args, int from_tty, |
942 | struct cmd_list_element *c) |
943 | { |
944 | show_packet_config_cmd (&remote_protocol_binary_download); |
945 | } |
946 | |
947 | /* Should we try the 'qPart:auxv' (target auxiliary vector read) request? */ |
948 | static struct packet_config remote_protocol_qPart_auxv; |
949 | |
950 | static void |
951 | set_remote_protocol_qPart_auxv_packet_cmd (char *args, int from_tty, |
952 | struct cmd_list_element *c) |
953 | { |
954 | update_packet_config (&remote_protocol_qPart_auxv); |
955 | } |
956 | |
957 | static void |
958 | show_remote_protocol_qPart_auxv_packet_cmd (char *args, int from_tty, |
959 | struct cmd_list_element *c) |
960 | { |
961 | show_packet_config_cmd (&remote_protocol_qPart_auxv); |
962 | } |
963 | |
964 | static struct packet_config remote_protocol_p; |
965 | |
966 | static void |
967 | set_remote_protocol_p_packet_cmd (char *args, int from_tty, |
968 | struct cmd_list_element *c) |
969 | { |
970 | update_packet_config (&remote_protocol_p); |
971 | } |
972 | |
973 | static void |
974 | show_remote_protocol_p_packet_cmd (char *args, int from_tty, |
975 | struct cmd_list_element *c) |
976 | { |
977 | show_packet_config_cmd (&remote_protocol_p); |
978 | } |
979 | |
980 | |
981 | |
982 | /* Tokens for use by the asynchronous signal handlers for SIGINT */ |
983 | static void *sigint_remote_twice_token; |
984 | static void *sigint_remote_token; |
985 | |
986 | /* These are pointers to hook functions that may be set in order to |
987 | modify resume/wait behavior for a particular architecture. */ |
988 | |
989 | void (*deprecated_target_resume_hook) (void); |
990 | void (*deprecated_target_wait_loop_hook) (void); |
991 | |
992 | |
993 | |
994 | /* These are the threads which we last sent to the remote system. |
995 | -1 for all or -2 for not sent yet. */ |
996 | static int general_thread; |
997 | static int continue_thread; |
998 | |
999 | /* Call this function as a result of |
1000 | 1) A halt indication (T packet) containing a thread id |
1001 | 2) A direct query of currthread |
1002 | 3) Successful execution of set thread |
1003 | */ |
1004 | |
1005 | static void |
1006 | record_currthread (int currthread) |
1007 | { |
1008 | general_thread = currthread; |
1009 | |
1010 | /* If this is a new thread, add it to GDB's thread list. |
1011 | If we leave it up to WFI to do this, bad things will happen. */ |
1012 | if (!in_thread_list (pid_to_ptid (currthread))) |
1013 | { |
1014 | add_thread (pid_to_ptid (currthread)); |
1015 | ui_out_text (uiout, "[New "); |
1016 | ui_out_text (uiout, target_pid_to_str (pid_to_ptid (currthread))current_target.to_pid_to_str (pid_to_ptid (currthread))); |
1017 | ui_out_text (uiout, "]\n"); |
1018 | } |
1019 | } |
1020 | |
1021 | #define MAGIC_NULL_PID42000 42000 |
1022 | |
1023 | static void |
1024 | set_thread (int th, int gen) |
1025 | { |
1026 | struct remote_state *rs = get_remote_state (); |
1027 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
1028 | int state = gen ? general_thread : continue_thread; |
1029 | |
1030 | if (state == th) |
1031 | return; |
1032 | |
1033 | buf[0] = 'H'; |
1034 | buf[1] = gen ? 'g' : 'c'; |
1035 | if (th == MAGIC_NULL_PID42000) |
1036 | { |
1037 | buf[2] = '0'; |
1038 | buf[3] = '\0'; |
1039 | } |
1040 | else if (th < 0) |
1041 | sprintf (&buf[2], "-%x", -th); |
1042 | else |
1043 | sprintf (&buf[2], "%x", th); |
1044 | putpkt (buf); |
1045 | getpkt (buf, (rs->remote_packet_size), 0); |
1046 | if (gen) |
1047 | general_thread = th; |
1048 | else |
1049 | continue_thread = th; |
1050 | } |
1051 | |
1052 | /* Return nonzero if the thread TH is still alive on the remote system. */ |
1053 | |
1054 | static int |
1055 | remote_thread_alive (ptid_t ptid) |
1056 | { |
1057 | int tid = PIDGET (ptid)(ptid_get_pid (ptid)); |
1058 | char buf[16]; |
1059 | |
1060 | if (tid < 0) |
1061 | sprintf (buf, "T-%08x", -tid); |
1062 | else |
1063 | sprintf (buf, "T%08x", tid); |
1064 | putpkt (buf); |
1065 | getpkt (buf, sizeof (buf), 0); |
1066 | return (buf[0] == 'O' && buf[1] == 'K'); |
1067 | } |
1068 | |
1069 | /* About these extended threadlist and threadinfo packets. They are |
1070 | variable length packets but, the fields within them are often fixed |
1071 | length. They are redundent enough to send over UDP as is the |
1072 | remote protocol in general. There is a matching unit test module |
1073 | in libstub. */ |
1074 | |
1075 | #define OPAQUETHREADBYTES8 8 |
1076 | |
1077 | /* a 64 bit opaque identifier */ |
1078 | typedef unsigned char threadref[OPAQUETHREADBYTES8]; |
1079 | |
1080 | /* WARNING: This threadref data structure comes from the remote O.S., libstub |
1081 | protocol encoding, and remote.c. it is not particularly changable */ |
1082 | |
1083 | /* Right now, the internal structure is int. We want it to be bigger. |
1084 | Plan to fix this. |
1085 | */ |
1086 | |
1087 | typedef int gdb_threadref; /* internal GDB thread reference */ |
1088 | |
1089 | /* gdb_ext_thread_info is an internal GDB data structure which is |
1090 | equivalint to the reply of the remote threadinfo packet */ |
1091 | |
1092 | struct gdb_ext_thread_info |
1093 | { |
1094 | threadref threadid; /* External form of thread reference */ |
1095 | int active; /* Has state interesting to GDB? , regs, stack */ |
1096 | char display[256]; /* Brief state display, name, blocked/syspended */ |
1097 | char shortname[32]; /* To be used to name threads */ |
1098 | char more_display[256]; /* Long info, statistics, queue depth, whatever */ |
1099 | }; |
1100 | |
1101 | /* The volume of remote transfers can be limited by submitting |
1102 | a mask containing bits specifying the desired information. |
1103 | Use a union of these values as the 'selection' parameter to |
1104 | get_thread_info. FIXME: Make these TAG names more thread specific. |
1105 | */ |
1106 | |
1107 | #define TAG_THREADID1 1 |
1108 | #define TAG_EXISTS2 2 |
1109 | #define TAG_DISPLAY4 4 |
1110 | #define TAG_THREADNAME8 8 |
1111 | #define TAG_MOREDISPLAY16 16 |
1112 | |
1113 | #define BUF_THREAD_ID_SIZE(8*2) (OPAQUETHREADBYTES8*2) |
1114 | |
1115 | char *unpack_varlen_hex (char *buff, ULONGESTunsigned long *result); |
1116 | |
1117 | static char *unpack_nibble (char *buf, int *val); |
1118 | |
1119 | static char *pack_nibble (char *buf, int nibble); |
1120 | |
1121 | static char *pack_hex_byte (char *pkt, int /*unsigned char */ byte); |
1122 | |
1123 | static char *unpack_byte (char *buf, int *value); |
1124 | |
1125 | static char *pack_int (char *buf, int value); |
1126 | |
1127 | static char *unpack_int (char *buf, int *value); |
1128 | |
1129 | static char *unpack_string (char *src, char *dest, int length); |
1130 | |
1131 | static char *pack_threadid (char *pkt, threadref * id); |
1132 | |
1133 | static char *unpack_threadid (char *inbuf, threadref * id); |
1134 | |
1135 | void int_to_threadref (threadref * id, int value); |
1136 | |
1137 | static int threadref_to_int (threadref * ref); |
1138 | |
1139 | static void copy_threadref (threadref * dest, threadref * src); |
1140 | |
1141 | static int threadmatch (threadref * dest, threadref * src); |
1142 | |
1143 | static char *pack_threadinfo_request (char *pkt, int mode, threadref * id); |
1144 | |
1145 | static int remote_unpack_thread_info_response (char *pkt, |
1146 | threadref * expectedref, |
1147 | struct gdb_ext_thread_info |
1148 | *info); |
1149 | |
1150 | |
1151 | static int remote_get_threadinfo (threadref * threadid, int fieldset, /*TAG mask */ |
1152 | struct gdb_ext_thread_info *info); |
1153 | |
1154 | static char *pack_threadlist_request (char *pkt, int startflag, |
1155 | int threadcount, |
1156 | threadref * nextthread); |
1157 | |
1158 | static int parse_threadlist_response (char *pkt, |
1159 | int result_limit, |
1160 | threadref * original_echo, |
1161 | threadref * resultlist, int *doneflag); |
1162 | |
1163 | static int remote_get_threadlist (int startflag, |
1164 | threadref * nextthread, |
1165 | int result_limit, |
1166 | int *done, |
1167 | int *result_count, threadref * threadlist); |
1168 | |
1169 | typedef int (*rmt_thread_action) (threadref * ref, void *context); |
1170 | |
1171 | static int remote_threadlist_iterator (rmt_thread_action stepfunction, |
1172 | void *context, int looplimit); |
1173 | |
1174 | static int remote_newthread_step (threadref * ref, void *context); |
1175 | |
1176 | /* encode 64 bits in 16 chars of hex */ |
1177 | |
1178 | static const char hexchars[] = "0123456789abcdef"; |
1179 | |
1180 | static int |
1181 | ishex (int ch, int *val) |
1182 | { |
1183 | if ((ch >= 'a') && (ch <= 'f')) |
1184 | { |
1185 | *val = ch - 'a' + 10; |
1186 | return 1; |
1187 | } |
1188 | if ((ch >= 'A') && (ch <= 'F')) |
1189 | { |
1190 | *val = ch - 'A' + 10; |
1191 | return 1; |
1192 | } |
1193 | if ((ch >= '0') && (ch <= '9')) |
1194 | { |
1195 | *val = ch - '0'; |
1196 | return 1; |
1197 | } |
1198 | return 0; |
1199 | } |
1200 | |
1201 | static int |
1202 | stubhex (int ch) |
1203 | { |
1204 | if (ch >= 'a' && ch <= 'f') |
1205 | return ch - 'a' + 10; |
1206 | if (ch >= '0' && ch <= '9') |
1207 | return ch - '0'; |
1208 | if (ch >= 'A' && ch <= 'F') |
1209 | return ch - 'A' + 10; |
1210 | return -1; |
1211 | } |
1212 | |
1213 | static int |
1214 | stub_unpack_int (char *buff, int fieldlength) |
1215 | { |
1216 | int nibble; |
1217 | int retval = 0; |
1218 | |
1219 | while (fieldlength) |
1220 | { |
1221 | nibble = stubhex (*buff++); |
1222 | retval |= nibble; |
1223 | fieldlength--; |
1224 | if (fieldlength) |
1225 | retval = retval << 4; |
1226 | } |
1227 | return retval; |
1228 | } |
1229 | |
1230 | char * |
1231 | unpack_varlen_hex (char *buff, /* packet to parse */ |
1232 | ULONGESTunsigned long *result) |
1233 | { |
1234 | int nibble; |
1235 | int retval = 0; |
1236 | |
1237 | while (ishex (*buff, &nibble)) |
1238 | { |
1239 | buff++; |
1240 | retval = retval << 4; |
1241 | retval |= nibble & 0x0f; |
1242 | } |
1243 | *result = retval; |
1244 | return buff; |
1245 | } |
1246 | |
1247 | static char * |
1248 | unpack_nibble (char *buf, int *val) |
1249 | { |
1250 | ishex (*buf++, val); |
1251 | return buf; |
1252 | } |
1253 | |
1254 | static char * |
1255 | pack_nibble (char *buf, int nibble) |
1256 | { |
1257 | *buf++ = hexchars[(nibble & 0x0f)]; |
1258 | return buf; |
1259 | } |
1260 | |
1261 | static char * |
1262 | pack_hex_byte (char *pkt, int byte) |
1263 | { |
1264 | *pkt++ = hexchars[(byte >> 4) & 0xf]; |
1265 | *pkt++ = hexchars[(byte & 0xf)]; |
1266 | return pkt; |
1267 | } |
1268 | |
1269 | static char * |
1270 | unpack_byte (char *buf, int *value) |
1271 | { |
1272 | *value = stub_unpack_int (buf, 2); |
1273 | return buf + 2; |
1274 | } |
1275 | |
1276 | static char * |
1277 | pack_int (char *buf, int value) |
1278 | { |
1279 | buf = pack_hex_byte (buf, (value >> 24) & 0xff); |
1280 | buf = pack_hex_byte (buf, (value >> 16) & 0xff); |
1281 | buf = pack_hex_byte (buf, (value >> 8) & 0x0ff); |
1282 | buf = pack_hex_byte (buf, (value & 0xff)); |
1283 | return buf; |
1284 | } |
1285 | |
1286 | static char * |
1287 | unpack_int (char *buf, int *value) |
1288 | { |
1289 | *value = stub_unpack_int (buf, 8); |
1290 | return buf + 8; |
1291 | } |
1292 | |
1293 | #if 0 /* currently unused, uncomment when needed */ |
1294 | static char *pack_string (char *pkt, char *string); |
1295 | |
1296 | static char * |
1297 | pack_string (char *pkt, char *string) |
1298 | { |
1299 | char ch; |
1300 | int len; |
1301 | |
1302 | len = strlen (string); |
1303 | if (len > 200) |
1304 | len = 200; /* Bigger than most GDB packets, junk??? */ |
1305 | pkt = pack_hex_byte (pkt, len); |
1306 | while (len-- > 0) |
1307 | { |
1308 | ch = *string++; |
1309 | if ((ch == '\0') || (ch == '#')) |
1310 | ch = '*'; /* Protect encapsulation */ |
1311 | *pkt++ = ch; |
1312 | } |
1313 | return pkt; |
1314 | } |
1315 | #endif /* 0 (unused) */ |
1316 | |
1317 | static char * |
1318 | unpack_string (char *src, char *dest, int length) |
1319 | { |
1320 | while (length--) |
1321 | *dest++ = *src++; |
1322 | *dest = '\0'; |
1323 | return src; |
1324 | } |
1325 | |
1326 | static char * |
1327 | pack_threadid (char *pkt, threadref *id) |
1328 | { |
1329 | char *limit; |
1330 | unsigned char *altid; |
1331 | |
1332 | altid = (unsigned char *) id; |
1333 | limit = pkt + BUF_THREAD_ID_SIZE(8*2); |
1334 | while (pkt < limit) |
1335 | pkt = pack_hex_byte (pkt, *altid++); |
1336 | return pkt; |
1337 | } |
1338 | |
1339 | |
1340 | static char * |
1341 | unpack_threadid (char *inbuf, threadref *id) |
1342 | { |
1343 | char *altref; |
1344 | char *limit = inbuf + BUF_THREAD_ID_SIZE(8*2); |
1345 | int x, y; |
1346 | |
1347 | altref = (char *) id; |
1348 | |
1349 | while (inbuf < limit) |
1350 | { |
1351 | x = stubhex (*inbuf++); |
1352 | y = stubhex (*inbuf++); |
1353 | *altref++ = (x << 4) | y; |
1354 | } |
1355 | return inbuf; |
1356 | } |
1357 | |
1358 | /* Externally, threadrefs are 64 bits but internally, they are still |
1359 | ints. This is due to a mismatch of specifications. We would like |
1360 | to use 64bit thread references internally. This is an adapter |
1361 | function. */ |
1362 | |
1363 | void |
1364 | int_to_threadref (threadref *id, int value) |
1365 | { |
1366 | unsigned char *scan; |
1367 | |
1368 | scan = (unsigned char *) id; |
1369 | { |
1370 | int i = 4; |
1371 | while (i--) |
1372 | *scan++ = 0; |
1373 | } |
1374 | *scan++ = (value >> 24) & 0xff; |
1375 | *scan++ = (value >> 16) & 0xff; |
1376 | *scan++ = (value >> 8) & 0xff; |
1377 | *scan++ = (value & 0xff); |
1378 | } |
1379 | |
1380 | static int |
1381 | threadref_to_int (threadref *ref) |
1382 | { |
1383 | int i, value = 0; |
1384 | unsigned char *scan; |
1385 | |
1386 | scan = (char *) ref; |
1387 | scan += 4; |
1388 | i = 4; |
1389 | while (i-- > 0) |
1390 | value = (value << 8) | ((*scan++) & 0xff); |
1391 | return value; |
1392 | } |
1393 | |
1394 | static void |
1395 | copy_threadref (threadref *dest, threadref *src) |
1396 | { |
1397 | int i; |
1398 | unsigned char *csrc, *cdest; |
1399 | |
1400 | csrc = (unsigned char *) src; |
1401 | cdest = (unsigned char *) dest; |
1402 | i = 8; |
1403 | while (i--) |
1404 | *cdest++ = *csrc++; |
1405 | } |
1406 | |
1407 | static int |
1408 | threadmatch (threadref *dest, threadref *src) |
1409 | { |
1410 | /* things are broken right now, so just assume we got a match */ |
1411 | #if 0 |
1412 | unsigned char *srcp, *destp; |
1413 | int i, result; |
1414 | srcp = (char *) src; |
1415 | destp = (char *) dest; |
1416 | |
1417 | result = 1; |
1418 | while (i-- > 0) |
1419 | result &= (*srcp++ == *destp++) ? 1 : 0; |
1420 | return result; |
1421 | #endif |
1422 | return 1; |
1423 | } |
1424 | |
1425 | /* |
1426 | threadid:1, # always request threadid |
1427 | context_exists:2, |
1428 | display:4, |
1429 | unique_name:8, |
1430 | more_display:16 |
1431 | */ |
1432 | |
1433 | /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */ |
1434 | |
1435 | static char * |
1436 | pack_threadinfo_request (char *pkt, int mode, threadref *id) |
1437 | { |
1438 | *pkt++ = 'q'; /* Info Query */ |
1439 | *pkt++ = 'P'; /* process or thread info */ |
1440 | pkt = pack_int (pkt, mode); /* mode */ |
1441 | pkt = pack_threadid (pkt, id); /* threadid */ |
1442 | *pkt = '\0'; /* terminate */ |
1443 | return pkt; |
1444 | } |
1445 | |
1446 | /* These values tag the fields in a thread info response packet */ |
1447 | /* Tagging the fields allows us to request specific fields and to |
1448 | add more fields as time goes by */ |
1449 | |
1450 | #define TAG_THREADID1 1 /* Echo the thread identifier */ |
1451 | #define TAG_EXISTS2 2 /* Is this process defined enough to |
1452 | fetch registers and its stack */ |
1453 | #define TAG_DISPLAY4 4 /* A short thing maybe to put on a window */ |
1454 | #define TAG_THREADNAME8 8 /* string, maps 1-to-1 with a thread is */ |
1455 | #define TAG_MOREDISPLAY16 16 /* Whatever the kernel wants to say about |
1456 | the process */ |
1457 | |
1458 | static int |
1459 | remote_unpack_thread_info_response (char *pkt, threadref *expectedref, |
1460 | struct gdb_ext_thread_info *info) |
1461 | { |
1462 | struct remote_state *rs = get_remote_state (); |
1463 | int mask, length; |
1464 | unsigned int tag; |
1465 | threadref ref; |
1466 | char *limit = pkt + (rs->remote_packet_size); /* plausable parsing limit */ |
1467 | int retval = 1; |
1468 | |
1469 | /* info->threadid = 0; FIXME: implement zero_threadref */ |
1470 | info->active = 0; |
1471 | info->display[0] = '\0'; |
1472 | info->shortname[0] = '\0'; |
1473 | info->more_display[0] = '\0'; |
1474 | |
1475 | /* Assume the characters indicating the packet type have been stripped */ |
1476 | pkt = unpack_int (pkt, &mask); /* arg mask */ |
1477 | pkt = unpack_threadid (pkt, &ref); |
1478 | |
1479 | if (mask == 0) |
1480 | warning ("Incomplete response to threadinfo request\n"); |
1481 | if (!threadmatch (&ref, expectedref)) |
1482 | { /* This is an answer to a different request */ |
1483 | warning ("ERROR RMT Thread info mismatch\n"); |
1484 | return 0; |
1485 | } |
1486 | copy_threadref (&info->threadid, &ref); |
1487 | |
1488 | /* Loop on tagged fields , try to bail if somthing goes wrong */ |
1489 | |
1490 | while ((pkt < limit) && mask && *pkt) /* packets are terminated with nulls */ |
1491 | { |
1492 | pkt = unpack_int (pkt, &tag); /* tag */ |
1493 | pkt = unpack_byte (pkt, &length); /* length */ |
1494 | if (!(tag & mask)) /* tags out of synch with mask */ |
1495 | { |
1496 | warning ("ERROR RMT: threadinfo tag mismatch\n"); |
1497 | retval = 0; |
1498 | break; |
1499 | } |
1500 | if (tag == TAG_THREADID1) |
1501 | { |
1502 | if (length != 16) |
1503 | { |
1504 | warning ("ERROR RMT: length of threadid is not 16\n"); |
1505 | retval = 0; |
1506 | break; |
1507 | } |
1508 | pkt = unpack_threadid (pkt, &ref); |
1509 | mask = mask & ~TAG_THREADID1; |
1510 | continue; |
1511 | } |
1512 | if (tag == TAG_EXISTS2) |
1513 | { |
1514 | info->active = stub_unpack_int (pkt, length); |
1515 | pkt += length; |
1516 | mask = mask & ~(TAG_EXISTS2); |
1517 | if (length > 8) |
1518 | { |
1519 | warning ("ERROR RMT: 'exists' length too long\n"); |
1520 | retval = 0; |
1521 | break; |
1522 | } |
1523 | continue; |
1524 | } |
1525 | if (tag == TAG_THREADNAME8) |
1526 | { |
1527 | pkt = unpack_string (pkt, &info->shortname[0], length); |
1528 | mask = mask & ~TAG_THREADNAME8; |
1529 | continue; |
1530 | } |
1531 | if (tag == TAG_DISPLAY4) |
1532 | { |
1533 | pkt = unpack_string (pkt, &info->display[0], length); |
1534 | mask = mask & ~TAG_DISPLAY4; |
1535 | continue; |
1536 | } |
1537 | if (tag == TAG_MOREDISPLAY16) |
1538 | { |
1539 | pkt = unpack_string (pkt, &info->more_display[0], length); |
1540 | mask = mask & ~TAG_MOREDISPLAY16; |
1541 | continue; |
1542 | } |
1543 | warning ("ERROR RMT: unknown thread info tag\n"); |
1544 | break; /* Not a tag we know about */ |
1545 | } |
1546 | return retval; |
1547 | } |
1548 | |
1549 | static int |
1550 | remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */ |
1551 | struct gdb_ext_thread_info *info) |
1552 | { |
1553 | struct remote_state *rs = get_remote_state (); |
1554 | int result; |
1555 | char *threadinfo_pkt = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
1556 | |
1557 | pack_threadinfo_request (threadinfo_pkt, fieldset, threadid); |
1558 | putpkt (threadinfo_pkt); |
1559 | getpkt (threadinfo_pkt, (rs->remote_packet_size), 0); |
1560 | result = remote_unpack_thread_info_response (threadinfo_pkt + 2, threadid, |
1561 | info); |
1562 | return result; |
1563 | } |
1564 | |
1565 | /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */ |
1566 | |
1567 | static char * |
1568 | pack_threadlist_request (char *pkt, int startflag, int threadcount, |
1569 | threadref *nextthread) |
1570 | { |
1571 | *pkt++ = 'q'; /* info query packet */ |
1572 | *pkt++ = 'L'; /* Process LIST or threadLIST request */ |
1573 | pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */ |
1574 | pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */ |
1575 | pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */ |
1576 | *pkt = '\0'; |
1577 | return pkt; |
1578 | } |
1579 | |
1580 | /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */ |
1581 | |
1582 | static int |
1583 | parse_threadlist_response (char *pkt, int result_limit, |
1584 | threadref *original_echo, threadref *resultlist, |
1585 | int *doneflag) |
1586 | { |
1587 | struct remote_state *rs = get_remote_state (); |
1588 | char *limit; |
1589 | int count, resultcount, done; |
1590 | |
1591 | resultcount = 0; |
1592 | /* Assume the 'q' and 'M chars have been stripped. */ |
1593 | limit = pkt + ((rs->remote_packet_size) - BUF_THREAD_ID_SIZE(8*2)); /* done parse past here */ |
1594 | pkt = unpack_byte (pkt, &count); /* count field */ |
1595 | pkt = unpack_nibble (pkt, &done); |
1596 | /* The first threadid is the argument threadid. */ |
1597 | pkt = unpack_threadid (pkt, original_echo); /* should match query packet */ |
1598 | while ((count-- > 0) && (pkt < limit)) |
1599 | { |
1600 | pkt = unpack_threadid (pkt, resultlist++); |
1601 | if (resultcount++ >= result_limit) |
1602 | break; |
1603 | } |
1604 | if (doneflag) |
1605 | *doneflag = done; |
1606 | return resultcount; |
1607 | } |
1608 | |
1609 | static int |
1610 | remote_get_threadlist (int startflag, threadref *nextthread, int result_limit, |
1611 | int *done, int *result_count, threadref *threadlist) |
1612 | { |
1613 | struct remote_state *rs = get_remote_state (); |
1614 | static threadref echo_nextthread; |
1615 | char *threadlist_packet = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
1616 | char *t_response = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
1617 | int result = 1; |
1618 | |
1619 | /* Trancate result limit to be smaller than the packet size */ |
1620 | if ((((result_limit + 1) * BUF_THREAD_ID_SIZE(8*2)) + 10) >= (rs->remote_packet_size)) |
1621 | result_limit = ((rs->remote_packet_size) / BUF_THREAD_ID_SIZE(8*2)) - 2; |
1622 | |
1623 | pack_threadlist_request (threadlist_packet, |
1624 | startflag, result_limit, nextthread); |
1625 | putpkt (threadlist_packet); |
1626 | getpkt (t_response, (rs->remote_packet_size), 0); |
1627 | |
1628 | *result_count = |
1629 | parse_threadlist_response (t_response + 2, result_limit, &echo_nextthread, |
1630 | threadlist, done); |
1631 | |
1632 | if (!threadmatch (&echo_nextthread, nextthread)) |
1633 | { |
1634 | /* FIXME: This is a good reason to drop the packet */ |
1635 | /* Possably, there is a duplicate response */ |
1636 | /* Possabilities : |
1637 | retransmit immediatly - race conditions |
1638 | retransmit after timeout - yes |
1639 | exit |
1640 | wait for packet, then exit |
1641 | */ |
1642 | warning ("HMM: threadlist did not echo arg thread, dropping it\n"); |
1643 | return 0; /* I choose simply exiting */ |
1644 | } |
1645 | if (*result_count <= 0) |
1646 | { |
1647 | if (*done != 1) |
1648 | { |
1649 | warning ("RMT ERROR : failed to get remote thread list\n"); |
1650 | result = 0; |
1651 | } |
1652 | return result; /* break; */ |
1653 | } |
1654 | if (*result_count > result_limit) |
1655 | { |
1656 | *result_count = 0; |
1657 | warning ("RMT ERROR: threadlist response longer than requested\n"); |
1658 | return 0; |
1659 | } |
1660 | return result; |
1661 | } |
1662 | |
1663 | /* This is the interface between remote and threads, remotes upper interface */ |
1664 | |
1665 | /* remote_find_new_threads retrieves the thread list and for each |
1666 | thread in the list, looks up the thread in GDB's internal list, |
1667 | ading the thread if it does not already exist. This involves |
1668 | getting partial thread lists from the remote target so, polling the |
1669 | quit_flag is required. */ |
1670 | |
1671 | |
1672 | /* About this many threadisds fit in a packet. */ |
1673 | |
1674 | #define MAXTHREADLISTRESULTS32 32 |
1675 | |
1676 | static int |
1677 | remote_threadlist_iterator (rmt_thread_action stepfunction, void *context, |
1678 | int looplimit) |
1679 | { |
1680 | int done, i, result_count; |
1681 | int startflag = 1; |
1682 | int result = 1; |
1683 | int loopcount = 0; |
1684 | static threadref nextthread; |
1685 | static threadref resultthreadlist[MAXTHREADLISTRESULTS32]; |
1686 | |
1687 | done = 0; |
1688 | while (!done) |
1689 | { |
1690 | if (loopcount++ > looplimit) |
1691 | { |
1692 | result = 0; |
1693 | warning ("Remote fetch threadlist -infinite loop-\n"); |
1694 | break; |
1695 | } |
1696 | if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS32, |
1697 | &done, &result_count, resultthreadlist)) |
1698 | { |
1699 | result = 0; |
1700 | break; |
1701 | } |
1702 | /* clear for later iterations */ |
1703 | startflag = 0; |
1704 | /* Setup to resume next batch of thread references, set nextthread. */ |
1705 | if (result_count >= 1) |
1706 | copy_threadref (&nextthread, &resultthreadlist[result_count - 1]); |
1707 | i = 0; |
1708 | while (result_count--) |
1709 | if (!(result = (*stepfunction) (&resultthreadlist[i++], context))) |
1710 | break; |
1711 | } |
1712 | return result; |
1713 | } |
1714 | |
1715 | static int |
1716 | remote_newthread_step (threadref *ref, void *context) |
1717 | { |
1718 | ptid_t ptid; |
1719 | |
1720 | ptid = pid_to_ptid (threadref_to_int (ref)); |
1721 | |
1722 | if (!in_thread_list (ptid)) |
1723 | add_thread (ptid); |
1724 | return 1; /* continue iterator */ |
1725 | } |
1726 | |
1727 | #define CRAZY_MAX_THREADS1000 1000 |
1728 | |
1729 | static ptid_t |
1730 | remote_current_thread (ptid_t oldpid) |
1731 | { |
1732 | struct remote_state *rs = get_remote_state (); |
1733 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
1734 | |
1735 | putpkt ("qC"); |
1736 | getpkt (buf, (rs->remote_packet_size), 0); |
1737 | if (buf[0] == 'Q' && buf[1] == 'C') |
1738 | return pid_to_ptid (strtol (&buf[2], NULL((void*)0), 16)); |
1739 | else |
1740 | return oldpid; |
1741 | } |
1742 | |
1743 | /* Find new threads for info threads command. |
1744 | * Original version, using John Metzler's thread protocol. |
1745 | */ |
1746 | |
1747 | static void |
1748 | remote_find_new_threads (void) |
1749 | { |
1750 | remote_threadlist_iterator (remote_newthread_step, 0, |
1751 | CRAZY_MAX_THREADS1000); |
1752 | if (PIDGET (inferior_ptid)(ptid_get_pid (inferior_ptid)) == MAGIC_NULL_PID42000) /* ack ack ack */ |
1753 | inferior_ptid = remote_current_thread (inferior_ptid); |
1754 | } |
1755 | |
1756 | /* |
1757 | * Find all threads for info threads command. |
1758 | * Uses new thread protocol contributed by Cisco. |
1759 | * Falls back and attempts to use the older method (above) |
1760 | * if the target doesn't respond to the new method. |
1761 | */ |
1762 | |
1763 | static void |
1764 | remote_threads_info (void) |
1765 | { |
1766 | struct remote_state *rs = get_remote_state (); |
1767 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
1768 | char *bufp; |
1769 | int tid; |
1770 | |
1771 | if (remote_desc == 0) /* paranoia */ |
1772 | error ("Command can only be used when connected to the remote target."); |
1773 | |
1774 | if (use_threadinfo_query) |
1775 | { |
1776 | putpkt ("qfThreadInfo"); |
1777 | bufp = buf; |
1778 | getpkt (bufp, (rs->remote_packet_size), 0); |
1779 | if (bufp[0] != '\0') /* q packet recognized */ |
1780 | { |
1781 | while (*bufp++ == 'm') /* reply contains one or more TID */ |
1782 | { |
1783 | do |
1784 | { |
1785 | tid = strtol (bufp, &bufp, 16); |
1786 | if (tid != 0 && !in_thread_list (pid_to_ptid (tid))) |
1787 | add_thread (pid_to_ptid (tid)); |
1788 | } |
1789 | while (*bufp++ == ','); /* comma-separated list */ |
1790 | putpkt ("qsThreadInfo"); |
1791 | bufp = buf; |
1792 | getpkt (bufp, (rs->remote_packet_size), 0); |
1793 | } |
1794 | return; /* done */ |
1795 | } |
1796 | } |
1797 | |
1798 | /* Else fall back to old method based on jmetzler protocol. */ |
1799 | use_threadinfo_query = 0; |
1800 | remote_find_new_threads (); |
1801 | return; |
1802 | } |
1803 | |
1804 | /* |
1805 | * Collect a descriptive string about the given thread. |
1806 | * The target may say anything it wants to about the thread |
1807 | * (typically info about its blocked / runnable state, name, etc.). |
1808 | * This string will appear in the info threads display. |
1809 | * |
1810 | * Optional: targets are not required to implement this function. |
1811 | */ |
1812 | |
1813 | static char * |
1814 | remote_threads_extra_info (struct thread_info *tp) |
1815 | { |
1816 | struct remote_state *rs = get_remote_state (); |
1817 | int result; |
1818 | int set; |
1819 | threadref id; |
1820 | struct gdb_ext_thread_info threadinfo; |
1821 | static char display_buf[100]; /* arbitrary... */ |
1822 | char *bufp = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
1823 | int n = 0; /* position in display_buf */ |
1824 | |
1825 | if (remote_desc == 0) /* paranoia */ |
1826 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/remote.c", __LINE__1826, |
1827 | "remote_threads_extra_info"); |
1828 | |
1829 | if (use_threadextra_query) |
1830 | { |
1831 | sprintf (bufp, "qThreadExtraInfo,%x", PIDGET (tp->ptid)(ptid_get_pid (tp->ptid))); |
1832 | putpkt (bufp); |
1833 | getpkt (bufp, (rs->remote_packet_size), 0); |
1834 | if (bufp[0] != 0) |
1835 | { |
1836 | n = min (strlen (bufp) / 2, sizeof (display_buf))((strlen (bufp) / 2) < (sizeof (display_buf)) ? (strlen (bufp ) / 2) : (sizeof (display_buf))); |
1837 | result = hex2bin (bufp, display_buf, n); |
1838 | display_buf [result] = '\0'; |
1839 | return display_buf; |
1840 | } |
1841 | } |
1842 | |
1843 | /* If the above query fails, fall back to the old method. */ |
1844 | use_threadextra_query = 0; |
1845 | set = TAG_THREADID1 | TAG_EXISTS2 | TAG_THREADNAME8 |
1846 | | TAG_MOREDISPLAY16 | TAG_DISPLAY4; |
1847 | int_to_threadref (&id, PIDGET (tp->ptid)(ptid_get_pid (tp->ptid))); |
1848 | if (remote_get_threadinfo (&id, set, &threadinfo)) |
1849 | if (threadinfo.active) |
1850 | { |
1851 | if (*threadinfo.shortname) |
1852 | n += sprintf(&display_buf[0], " Name: %s,", threadinfo.shortname); |
1853 | if (*threadinfo.display) |
1854 | n += sprintf(&display_buf[n], " State: %s,", threadinfo.display); |
1855 | if (*threadinfo.more_display) |
1856 | n += sprintf(&display_buf[n], " Priority: %s", |
1857 | threadinfo.more_display); |
1858 | |
1859 | if (n > 0) |
1860 | { |
1861 | /* for purely cosmetic reasons, clear up trailing commas */ |
1862 | if (',' == display_buf[n-1]) |
1863 | display_buf[n-1] = ' '; |
1864 | return display_buf; |
1865 | } |
1866 | } |
1867 | return NULL((void*)0); |
1868 | } |
1869 | |
1870 | |
1871 | |
1872 | /* Restart the remote side; this is an extended protocol operation. */ |
1873 | |
1874 | static void |
1875 | extended_remote_restart (void) |
1876 | { |
1877 | struct remote_state *rs = get_remote_state (); |
1878 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
1879 | |
1880 | /* Send the restart command; for reasons I don't understand the |
1881 | remote side really expects a number after the "R". */ |
1882 | buf[0] = 'R'; |
1883 | sprintf (&buf[1], "%x", 0); |
1884 | putpkt (buf); |
1885 | |
1886 | /* Now query for status so this looks just like we restarted |
1887 | gdbserver from scratch. */ |
1888 | putpkt ("?"); |
1889 | getpkt (buf, (rs->remote_packet_size), 0); |
1890 | } |
1891 | |
1892 | /* Clean up connection to a remote debugger. */ |
1893 | |
1894 | static void |
1895 | remote_close (int quitting) |
1896 | { |
1897 | if (remote_desc) |
1898 | serial_close (remote_desc); |
1899 | remote_desc = NULL((void*)0); |
1900 | } |
1901 | |
1902 | /* Query the remote side for the text, data and bss offsets. */ |
1903 | |
1904 | static void |
1905 | get_offsets (void) |
1906 | { |
1907 | struct remote_state *rs = get_remote_state (); |
1908 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
1909 | char *ptr; |
1910 | int lose; |
1911 | CORE_ADDR text_addr, data_addr, bss_addr; |
1912 | struct section_offsets *offs; |
1913 | |
1914 | putpkt ("qOffsets"); |
1915 | |
1916 | getpkt (buf, (rs->remote_packet_size), 0); |
1917 | |
1918 | if (buf[0] == '\000') |
1919 | return; /* Return silently. Stub doesn't support |
1920 | this command. */ |
1921 | if (buf[0] == 'E') |
1922 | { |
1923 | warning ("Remote failure reply: %s", buf); |
1924 | return; |
1925 | } |
1926 | |
1927 | /* Pick up each field in turn. This used to be done with scanf, but |
1928 | scanf will make trouble if CORE_ADDR size doesn't match |
1929 | conversion directives correctly. The following code will work |
1930 | with any size of CORE_ADDR. */ |
1931 | text_addr = data_addr = bss_addr = 0; |
1932 | ptr = buf; |
1933 | lose = 0; |
1934 | |
1935 | if (strncmp (ptr, "Text=", 5) == 0) |
1936 | { |
1937 | ptr += 5; |
1938 | /* Don't use strtol, could lose on big values. */ |
1939 | while (*ptr && *ptr != ';') |
1940 | text_addr = (text_addr << 4) + fromhex (*ptr++); |
1941 | } |
1942 | else |
1943 | lose = 1; |
1944 | |
1945 | if (!lose && strncmp (ptr, ";Data=", 6) == 0) |
1946 | { |
1947 | ptr += 6; |
1948 | while (*ptr && *ptr != ';') |
1949 | data_addr = (data_addr << 4) + fromhex (*ptr++); |
1950 | } |
1951 | else |
1952 | lose = 1; |
1953 | |
1954 | if (!lose && strncmp (ptr, ";Bss=", 5) == 0) |
1955 | { |
1956 | ptr += 5; |
1957 | while (*ptr && *ptr != ';') |
1958 | bss_addr = (bss_addr << 4) + fromhex (*ptr++); |
1959 | } |
1960 | else |
1961 | lose = 1; |
1962 | |
1963 | if (lose) |
1964 | error ("Malformed response to offset query, %s", buf); |
1965 | |
1966 | if (symfile_objfile == NULL((void*)0)) |
1967 | return; |
1968 | |
1969 | offs = ((struct section_offsets *) |
1970 | alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections))__builtin_alloca((sizeof (struct section_offsets) + sizeof (( (struct section_offsets *) 0)->offsets) * ((symfile_objfile ->num_sections)-1)))); |
1971 | memcpy (offs, symfile_objfile->section_offsets, |
1972 | SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)(sizeof (struct section_offsets) + sizeof (((struct section_offsets *) 0)->offsets) * ((symfile_objfile->num_sections)-1))); |
1973 | |
1974 | offs->offsets[SECT_OFF_TEXT (symfile_objfile)((symfile_objfile->sect_index_text == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/remote.c", 1974, "sect_index_text not initialized" ), -1) : symfile_objfile->sect_index_text)] = text_addr; |
1975 | |
1976 | /* This is a temporary kludge to force data and bss to use the same offsets |
1977 | because that's what nlmconv does now. The real solution requires changes |
1978 | to the stub and remote.c that I don't have time to do right now. */ |
1979 | |
1980 | offs->offsets[SECT_OFF_DATA (symfile_objfile)((symfile_objfile->sect_index_data == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/remote.c", 1980, "sect_index_data not initialized" ), -1) : symfile_objfile->sect_index_data)] = data_addr; |
1981 | offs->offsets[SECT_OFF_BSS (symfile_objfile)(symfile_objfile)->sect_index_bss] = data_addr; |
1982 | |
1983 | objfile_relocate (symfile_objfile, offs); |
1984 | } |
1985 | |
1986 | /* Stub for catch_errors. */ |
1987 | |
1988 | static int |
1989 | remote_start_remote_dummy (struct ui_out *uiout, void *dummy) |
1990 | { |
1991 | start_remote (); /* Initialize gdb process mechanisms */ |
1992 | /* NOTE: Return something >=0. A -ve value is reserved for |
1993 | catch_exceptions. */ |
1994 | return 1; |
1995 | } |
1996 | |
1997 | static int |
1998 | remote_start_remote (struct ui_out *uiout, void *dummy) |
1999 | { |
2000 | immediate_quit++; /* Allow user to interrupt it */ |
2001 | |
2002 | /* Ack any packet which the remote side has already sent. */ |
2003 | serial_write (remote_desc, "+", 1); |
2004 | |
2005 | /* Let the stub know that we want it to return the thread. */ |
2006 | set_thread (-1, 0); |
2007 | |
2008 | inferior_ptid = remote_current_thread (inferior_ptid); |
2009 | |
2010 | get_offsets (); /* Get text, data & bss offsets */ |
2011 | |
2012 | putpkt ("?"); /* initiate a query from remote machine */ |
2013 | immediate_quit--; |
2014 | |
2015 | /* NOTE: See comment above in remote_start_remote_dummy(). This |
2016 | function returns something >=0. */ |
2017 | return remote_start_remote_dummy (uiout, dummy); |
2018 | } |
2019 | |
2020 | /* Open a connection to a remote debugger. |
2021 | NAME is the filename used for communication. */ |
2022 | |
2023 | static void |
2024 | remote_open (char *name, int from_tty) |
2025 | { |
2026 | remote_open_1 (name, from_tty, &remote_ops, 0, 0); |
2027 | } |
2028 | |
2029 | /* Just like remote_open, but with asynchronous support. */ |
2030 | static void |
2031 | remote_async_open (char *name, int from_tty) |
2032 | { |
2033 | remote_open_1 (name, from_tty, &remote_async_ops, 0, 1); |
2034 | } |
2035 | |
2036 | /* Open a connection to a remote debugger using the extended |
2037 | remote gdb protocol. NAME is the filename used for communication. */ |
2038 | |
2039 | static void |
2040 | extended_remote_open (char *name, int from_tty) |
2041 | { |
2042 | remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */, |
2043 | 0 /* async_p */); |
2044 | } |
2045 | |
2046 | /* Just like extended_remote_open, but with asynchronous support. */ |
2047 | static void |
2048 | extended_remote_async_open (char *name, int from_tty) |
2049 | { |
2050 | remote_open_1 (name, from_tty, &extended_async_remote_ops, |
2051 | 1 /*extended_p */, 1 /* async_p */); |
2052 | } |
2053 | |
2054 | /* Generic code for opening a connection to a remote target. */ |
2055 | |
2056 | static void |
2057 | init_all_packet_configs (void) |
2058 | { |
2059 | int i; |
2060 | update_packet_config (&remote_protocol_P); |
2061 | update_packet_config (&remote_protocol_p); |
2062 | update_packet_config (&remote_protocol_qSymbol); |
2063 | update_packet_config (&remote_protocol_vcont); |
2064 | for (i = 0; i < NR_Z_PACKET_TYPES; i++) |
2065 | update_packet_config (&remote_protocol_Z[i]); |
2066 | /* Force remote_write_bytes to check whether target supports binary |
2067 | downloading. */ |
2068 | update_packet_config (&remote_protocol_binary_download); |
2069 | update_packet_config (&remote_protocol_qPart_auxv); |
2070 | } |
2071 | |
2072 | /* Symbol look-up. */ |
2073 | |
2074 | static void |
2075 | remote_check_symbols (struct objfile *objfile) |
2076 | { |
2077 | struct remote_state *rs = get_remote_state (); |
2078 | char *msg, *reply, *tmp; |
2079 | struct minimal_symbol *sym; |
2080 | int end; |
2081 | |
2082 | if (remote_protocol_qSymbol.support == PACKET_DISABLE) |
2083 | return; |
2084 | |
2085 | msg = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
2086 | reply = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
2087 | |
2088 | /* Invite target to request symbol lookups. */ |
2089 | |
2090 | putpkt ("qSymbol::"); |
2091 | getpkt (reply, (rs->remote_packet_size), 0); |
2092 | packet_ok (reply, &remote_protocol_qSymbol); |
2093 | |
2094 | while (strncmp (reply, "qSymbol:", 8) == 0) |
2095 | { |
2096 | tmp = &reply[8]; |
2097 | end = hex2bin (tmp, msg, strlen (tmp) / 2); |
2098 | msg[end] = '\0'; |
2099 | sym = lookup_minimal_symbol (msg, NULL((void*)0), NULL((void*)0)); |
2100 | if (sym == NULL((void*)0)) |
2101 | sprintf (msg, "qSymbol::%s", &reply[8]); |
2102 | else |
2103 | sprintf (msg, "qSymbol:%s:%s", |
2104 | paddr_nz (SYMBOL_VALUE_ADDRESS (sym)(sym)->ginfo.value.address), |
2105 | &reply[8]); |
2106 | putpkt (msg); |
2107 | getpkt (reply, (rs->remote_packet_size), 0); |
2108 | } |
2109 | } |
2110 | |
2111 | static struct serial * |
2112 | remote_serial_open (char *name) |
2113 | { |
2114 | static int udp_warning = 0; |
2115 | |
2116 | /* FIXME: Parsing NAME here is a hack. But we want to warn here instead |
2117 | of in ser-tcp.c, because it is the remote protocol assuming that the |
2118 | serial connection is reliable and not the serial connection promising |
2119 | to be. */ |
2120 | if (!udp_warning && strncmp (name, "udp:", 4) == 0) |
2121 | { |
2122 | warning ("The remote protocol may be unreliable over UDP."); |
2123 | warning ("Some events may be lost, rendering further debugging " |
2124 | "impossible."); |
2125 | udp_warning = 1; |
2126 | } |
2127 | |
2128 | return serial_open (name); |
2129 | } |
2130 | |
2131 | static void |
2132 | remote_open_1 (char *name, int from_tty, struct target_ops *target, |
2133 | int extended_p, int async_p) |
2134 | { |
2135 | int ex; |
2136 | struct remote_state *rs = get_remote_state (); |
2137 | if (name == 0) |
2138 | error ("To open a remote debug connection, you need to specify what\n" |
2139 | "serial device is attached to the remote system\n" |
2140 | "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."); |
2141 | |
2142 | /* See FIXME above */ |
2143 | if (!async_p) |
2144 | wait_forever_enabled_p = 1; |
2145 | |
2146 | reopen_exec_file (); |
2147 | reread_symbols (); |
2148 | |
2149 | target_preopen (from_tty); |
2150 | |
2151 | unpush_target (target); |
2152 | |
2153 | remote_desc = remote_serial_open (name); |
2154 | if (!remote_desc) |
2155 | perror_with_name (name); |
2156 | |
2157 | if (baud_rate != -1) |
2158 | { |
2159 | if (serial_setbaudrate (remote_desc, baud_rate)) |
2160 | { |
2161 | /* The requested speed could not be set. Error out to |
2162 | top level after closing remote_desc. Take care to |
2163 | set remote_desc to NULL to avoid closing remote_desc |
2164 | more than once. */ |
2165 | serial_close (remote_desc); |
2166 | remote_desc = NULL((void*)0); |
2167 | perror_with_name (name); |
2168 | } |
2169 | } |
2170 | |
2171 | serial_raw (remote_desc); |
2172 | |
2173 | /* If there is something sitting in the buffer we might take it as a |
2174 | response to a command, which would be bad. */ |
2175 | serial_flush_input (remote_desc); |
2176 | |
2177 | if (from_tty) |
2178 | { |
2179 | puts_filtered ("Remote debugging using "); |
2180 | puts_filtered (name); |
2181 | puts_filtered ("\n"); |
2182 | } |
2183 | push_target (target); /* Switch to using remote target now */ |
2184 | |
2185 | init_all_packet_configs (); |
2186 | |
2187 | general_thread = -2; |
2188 | continue_thread = -2; |
2189 | |
2190 | /* Probe for ability to use "ThreadInfo" query, as required. */ |
2191 | use_threadinfo_query = 1; |
2192 | use_threadextra_query = 1; |
2193 | |
2194 | /* Without this, some commands which require an active target (such |
2195 | as kill) won't work. This variable serves (at least) double duty |
2196 | as both the pid of the target process (if it has such), and as a |
2197 | flag indicating that a target is active. These functions should |
2198 | be split out into seperate variables, especially since GDB will |
2199 | someday have a notion of debugging several processes. */ |
2200 | |
2201 | inferior_ptid = pid_to_ptid (MAGIC_NULL_PID42000); |
2202 | |
2203 | if (async_p) |
2204 | { |
2205 | /* With this target we start out by owning the terminal. */ |
2206 | remote_async_terminal_ours_p = 1; |
2207 | |
2208 | /* FIXME: cagney/1999-09-23: During the initial connection it is |
2209 | assumed that the target is already ready and able to respond to |
2210 | requests. Unfortunately remote_start_remote() eventually calls |
2211 | wait_for_inferior() with no timeout. wait_forever_enabled_p gets |
2212 | around this. Eventually a mechanism that allows |
2213 | wait_for_inferior() to expect/get timeouts will be |
2214 | implemented. */ |
2215 | wait_forever_enabled_p = 0; |
2216 | } |
2217 | |
2218 | #ifdef SOLIB_CREATE_INFERIOR_HOOK |
2219 | /* First delete any symbols previously loaded from shared libraries. */ |
2220 | no_shared_libraries (NULL((void*)0), 0); |
2221 | #endif |
2222 | |
2223 | /* Start the remote connection. If error() or QUIT, discard this |
2224 | target (we'd otherwise be in an inconsistent state) and then |
2225 | propogate the error on up the exception chain. This ensures that |
2226 | the caller doesn't stumble along blindly assuming that the |
2227 | function succeeded. The CLI doesn't have this problem but other |
2228 | UI's, such as MI do. |
2229 | |
2230 | FIXME: cagney/2002-05-19: Instead of re-throwing the exception, |
2231 | this function should return an error indication letting the |
2232 | caller restore the previous state. Unfortunately the command |
2233 | ``target remote'' is directly wired to this function making that |
2234 | impossible. On a positive note, the CLI side of this problem has |
2235 | been fixed - the function set_cmd_context() makes it possible for |
2236 | all the ``target ....'' commands to share a common callback |
2237 | function. See cli-dump.c. */ |
2238 | ex = catch_exceptions (uiout, |
2239 | remote_start_remote, NULL((void*)0), |
2240 | "Couldn't establish connection to remote" |
2241 | " target\n", |
2242 | RETURN_MASK_ALL((1 << (int)(-RETURN_QUIT)) | (1 << (int)(-RETURN_ERROR )))); |
2243 | if (ex < 0) |
2244 | { |
2245 | pop_target (); |
2246 | if (async_p) |
2247 | wait_forever_enabled_p = 1; |
2248 | throw_exception (ex); |
2249 | } |
2250 | |
2251 | if (async_p) |
2252 | wait_forever_enabled_p = 1; |
2253 | |
2254 | if (extended_p) |
2255 | { |
2256 | /* Tell the remote that we are using the extended protocol. */ |
2257 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
2258 | putpkt ("!"); |
2259 | getpkt (buf, (rs->remote_packet_size), 0); |
2260 | } |
2261 | #ifdef SOLIB_CREATE_INFERIOR_HOOK |
2262 | /* FIXME: need a master target_open vector from which all |
2263 | remote_opens can be called, so that stuff like this can |
2264 | go there. Failing that, the following code must be copied |
2265 | to the open function for any remote target that wants to |
2266 | support svr4 shared libraries. */ |
2267 | |
2268 | /* Set up to detect and load shared libraries. */ |
2269 | if (exec_bfd) /* No use without an exec file. */ |
2270 | { |
2271 | SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid))solib_create_inferior_hook(); |
2272 | remote_check_symbols (symfile_objfile); |
2273 | } |
2274 | #endif |
2275 | } |
2276 | |
2277 | /* This takes a program previously attached to and detaches it. After |
2278 | this is done, GDB can be used to debug some other program. We |
2279 | better not have left any breakpoints in the target program or it'll |
2280 | die when it hits one. */ |
2281 | |
2282 | static void |
2283 | remote_detach (char *args, int from_tty) |
2284 | { |
2285 | struct remote_state *rs = get_remote_state (); |
2286 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
2287 | |
2288 | if (args) |
2289 | error ("Argument given to \"detach\" when remotely debugging."); |
2290 | |
2291 | /* Tell the remote target to detach. */ |
2292 | strcpy (buf, "D"); |
2293 | remote_send (buf, (rs->remote_packet_size)); |
2294 | |
2295 | /* Unregister the file descriptor from the event loop. */ |
2296 | if (target_is_async_p ()(current_target.to_is_async_p())) |
2297 | serial_async (remote_desc, NULL((void*)0), 0); |
2298 | |
2299 | target_mourn_inferior ()(*current_target.to_mourn_inferior) (); |
2300 | if (from_tty) |
2301 | puts_filtered ("Ending remote debugging.\n"); |
2302 | } |
2303 | |
2304 | /* Same as remote_detach, but don't send the "D" packet; just disconnect. */ |
2305 | |
2306 | static void |
2307 | remote_disconnect (char *args, int from_tty) |
2308 | { |
2309 | struct remote_state *rs = get_remote_state (); |
2310 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
2311 | |
2312 | if (args) |
2313 | error ("Argument given to \"detach\" when remotely debugging."); |
2314 | |
2315 | /* Unregister the file descriptor from the event loop. */ |
2316 | if (target_is_async_p ()(current_target.to_is_async_p())) |
2317 | serial_async (remote_desc, NULL((void*)0), 0); |
2318 | |
2319 | target_mourn_inferior ()(*current_target.to_mourn_inferior) (); |
2320 | if (from_tty) |
2321 | puts_filtered ("Ending remote debugging.\n"); |
2322 | } |
2323 | |
2324 | /* Convert hex digit A to a number. */ |
2325 | |
2326 | static int |
2327 | fromhex (int a) |
2328 | { |
2329 | if (a >= '0' && a <= '9') |
2330 | return a - '0'; |
2331 | else if (a >= 'a' && a <= 'f') |
2332 | return a - 'a' + 10; |
2333 | else if (a >= 'A' && a <= 'F') |
2334 | return a - 'A' + 10; |
2335 | else |
2336 | error ("Reply contains invalid hex digit %d", a); |
2337 | } |
2338 | |
2339 | static int |
2340 | hex2bin (const char *hex, char *bin, int count) |
2341 | { |
2342 | int i; |
2343 | |
2344 | for (i = 0; i < count; i++) |
2345 | { |
2346 | if (hex[0] == 0 || hex[1] == 0) |
2347 | { |
2348 | /* Hex string is short, or of uneven length. |
2349 | Return the count that has been converted so far. */ |
2350 | return i; |
2351 | } |
2352 | *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]); |
2353 | hex += 2; |
2354 | } |
2355 | return i; |
2356 | } |
2357 | |
2358 | /* Convert number NIB to a hex digit. */ |
2359 | |
2360 | static int |
2361 | tohex (int nib) |
2362 | { |
2363 | if (nib < 10) |
2364 | return '0' + nib; |
2365 | else |
2366 | return 'a' + nib - 10; |
2367 | } |
2368 | |
2369 | static int |
2370 | bin2hex (const char *bin, char *hex, int count) |
2371 | { |
2372 | int i; |
2373 | /* May use a length, or a nul-terminated string as input. */ |
2374 | if (count == 0) |
2375 | count = strlen (bin); |
2376 | |
2377 | for (i = 0; i < count; i++) |
2378 | { |
2379 | *hex++ = tohex ((*bin >> 4) & 0xf); |
2380 | *hex++ = tohex (*bin++ & 0xf); |
2381 | } |
2382 | *hex = 0; |
2383 | return i; |
2384 | } |
2385 | |
2386 | /* Check for the availability of vCont. This function should also check |
2387 | the response. */ |
2388 | |
2389 | static void |
2390 | remote_vcont_probe (struct remote_state *rs, char *buf) |
2391 | { |
2392 | strcpy (buf, "vCont?"); |
2393 | putpkt (buf); |
2394 | getpkt (buf, rs->remote_packet_size, 0); |
2395 | |
2396 | /* Make sure that the features we assume are supported. */ |
2397 | if (strncmp (buf, "vCont", 5) == 0) |
2398 | { |
2399 | char *p = &buf[5]; |
2400 | int support_s, support_S, support_c, support_C; |
2401 | |
2402 | support_s = 0; |
2403 | support_S = 0; |
2404 | support_c = 0; |
2405 | support_C = 0; |
2406 | while (p && *p == ';') |
2407 | { |
2408 | p++; |
2409 | if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0)) |
2410 | support_s = 1; |
2411 | else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0)) |
2412 | support_S = 1; |
2413 | else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0)) |
2414 | support_c = 1; |
2415 | else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0)) |
2416 | support_C = 1; |
2417 | |
2418 | p = strchr (p, ';'); |
2419 | } |
2420 | |
2421 | /* If s, S, c, and C are not all supported, we can't use vCont. Clearing |
2422 | BUF will make packet_ok disable the packet. */ |
2423 | if (!support_s || !support_S || !support_c || !support_C) |
2424 | buf[0] = 0; |
2425 | } |
2426 | |
2427 | packet_ok (buf, &remote_protocol_vcont); |
2428 | } |
2429 | |
2430 | /* Resume the remote inferior by using a "vCont" packet. The thread |
2431 | to be resumed is PTID; STEP and SIGGNAL indicate whether the |
2432 | resumed thread should be single-stepped and/or signalled. If PTID's |
2433 | PID is -1, then all threads are resumed; the thread to be stepped and/or |
2434 | signalled is given in the global INFERIOR_PTID. This function returns |
2435 | non-zero iff it resumes the inferior. |
2436 | |
2437 | This function issues a strict subset of all possible vCont commands at the |
2438 | moment. */ |
2439 | |
2440 | static int |
2441 | remote_vcont_resume (ptid_t ptid, int step, enum target_signal siggnal) |
2442 | { |
2443 | struct remote_state *rs = get_remote_state (); |
2444 | int pid = PIDGET (ptid)(ptid_get_pid (ptid)); |
2445 | char *buf = NULL((void*)0), *outbuf; |
2446 | struct cleanup *old_cleanup; |
2447 | |
2448 | buf = xmalloc (rs->remote_packet_size); |
2449 | old_cleanup = make_cleanup (xfree, buf); |
2450 | |
2451 | if (remote_protocol_vcont.support == PACKET_SUPPORT_UNKNOWN) |
2452 | remote_vcont_probe (rs, buf); |
2453 | |
2454 | if (remote_protocol_vcont.support == PACKET_DISABLE) |
2455 | { |
2456 | do_cleanups (old_cleanup); |
2457 | return 0; |
2458 | } |
2459 | |
2460 | /* If we could generate a wider range of packets, we'd have to worry |
2461 | about overflowing BUF. Should there be a generic |
2462 | "multi-part-packet" packet? */ |
2463 | |
2464 | if (PIDGET (inferior_ptid)(ptid_get_pid (inferior_ptid)) == MAGIC_NULL_PID42000) |
2465 | { |
2466 | /* MAGIC_NULL_PTID means that we don't have any active threads, so we |
2467 | don't have any PID numbers the inferior will understand. Make sure |
2468 | to only send forms that do not specify a PID. */ |
2469 | if (step && siggnal != TARGET_SIGNAL_0) |
2470 | outbuf = xstrprintf ("vCont;S%02x", siggnal); |
2471 | else if (step) |
2472 | outbuf = xstrprintf ("vCont;s"); |
2473 | else if (siggnal != TARGET_SIGNAL_0) |
2474 | outbuf = xstrprintf ("vCont;C%02x", siggnal); |
2475 | else |
2476 | outbuf = xstrprintf ("vCont;c"); |
2477 | } |
2478 | else if (pid == -1) |
2479 | { |
2480 | /* Resume all threads, with preference for INFERIOR_PTID. */ |
2481 | if (step && siggnal != TARGET_SIGNAL_0) |
2482 | outbuf = xstrprintf ("vCont;S%02x:%x;c", siggnal, |
2483 | PIDGET (inferior_ptid)(ptid_get_pid (inferior_ptid))); |
2484 | else if (step) |
2485 | outbuf = xstrprintf ("vCont;s:%x;c", PIDGET (inferior_ptid)(ptid_get_pid (inferior_ptid))); |
2486 | else if (siggnal != TARGET_SIGNAL_0) |
2487 | outbuf = xstrprintf ("vCont;C%02x:%x;c", siggnal, |
2488 | PIDGET (inferior_ptid)(ptid_get_pid (inferior_ptid))); |
2489 | else |
2490 | outbuf = xstrprintf ("vCont;c"); |
2491 | } |
2492 | else |
2493 | { |
2494 | /* Scheduler locking; resume only PTID. */ |
2495 | if (step && siggnal != TARGET_SIGNAL_0) |
2496 | outbuf = xstrprintf ("vCont;S%02x:%x", siggnal, pid); |
2497 | else if (step) |
2498 | outbuf = xstrprintf ("vCont;s:%x", pid); |
2499 | else if (siggnal != TARGET_SIGNAL_0) |
2500 | outbuf = xstrprintf ("vCont;C%02x:%x", siggnal, pid); |
2501 | else |
2502 | outbuf = xstrprintf ("vCont;c:%x", pid); |
2503 | } |
2504 | |
2505 | gdb_assert (outbuf && strlen (outbuf) < rs->remote_packet_size)((void) ((outbuf && strlen (outbuf) < rs->remote_packet_size ) ? 0 : (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/remote.c" , 2505, "%s: Assertion `%s' failed.", __PRETTY_FUNCTION__, "outbuf && strlen (outbuf) < rs->remote_packet_size" ), 0))); |
2506 | make_cleanup (xfree, outbuf); |
2507 | |
2508 | putpkt (outbuf); |
2509 | |
2510 | do_cleanups (old_cleanup); |
2511 | |
2512 | return 1; |
2513 | } |
2514 | |
2515 | /* Tell the remote machine to resume. */ |
2516 | |
2517 | static enum target_signal last_sent_signal = TARGET_SIGNAL_0; |
2518 | |
2519 | static int last_sent_step; |
2520 | |
2521 | static void |
2522 | remote_resume (ptid_t ptid, int step, enum target_signal siggnal) |
2523 | { |
2524 | struct remote_state *rs = get_remote_state (); |
2525 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
2526 | int pid = PIDGET (ptid)(ptid_get_pid (ptid)); |
2527 | char *p; |
2528 | |
2529 | last_sent_signal = siggnal; |
2530 | last_sent_step = step; |
2531 | |
2532 | /* A hook for when we need to do something at the last moment before |
2533 | resumption. */ |
2534 | if (deprecated_target_resume_hook) |
2535 | (*deprecated_target_resume_hook) (); |
2536 | |
2537 | /* The vCont packet doesn't need to specify threads via Hc. */ |
2538 | if (remote_vcont_resume (ptid, step, siggnal)) |
2539 | return; |
2540 | |
2541 | /* All other supported resume packets do use Hc, so call set_thread. */ |
2542 | if (pid == -1) |
2543 | set_thread (0, 0); /* run any thread */ |
2544 | else |
2545 | set_thread (pid, 0); /* run this thread */ |
2546 | |
2547 | if (siggnal != TARGET_SIGNAL_0) |
2548 | { |
2549 | buf[0] = step ? 'S' : 'C'; |
2550 | buf[1] = tohex (((int) siggnal >> 4) & 0xf); |
2551 | buf[2] = tohex (((int) siggnal) & 0xf); |
2552 | buf[3] = '\0'; |
2553 | } |
2554 | else |
2555 | strcpy (buf, step ? "s" : "c"); |
2556 | |
2557 | putpkt (buf); |
2558 | } |
2559 | |
2560 | /* Same as remote_resume, but with async support. */ |
2561 | static void |
2562 | remote_async_resume (ptid_t ptid, int step, enum target_signal siggnal) |
2563 | { |
2564 | remote_resume (ptid, step, siggnal); |
2565 | |
2566 | /* We are about to start executing the inferior, let's register it |
2567 | with the event loop. NOTE: this is the one place where all the |
2568 | execution commands end up. We could alternatively do this in each |
2569 | of the execution commands in infcmd.c.*/ |
2570 | /* FIXME: ezannoni 1999-09-28: We may need to move this out of here |
2571 | into infcmd.c in order to allow inferior function calls to work |
2572 | NOT asynchronously. */ |
2573 | if (target_can_async_p ()(current_target.to_can_async_p ())) |
2574 | target_async (inferior_event_handler, 0)(current_target.to_async((inferior_event_handler), (0))); |
2575 | /* Tell the world that the target is now executing. */ |
2576 | /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set |
2577 | this? Instead, should the client of target just assume (for |
2578 | async targets) that the target is going to start executing? Is |
2579 | this information already found in the continuation block? */ |
2580 | if (target_is_async_p ()(current_target.to_is_async_p())) |
2581 | target_executing = 1; |
2582 | } |
2583 | |
2584 | |
2585 | /* Set up the signal handler for SIGINT, while the target is |
2586 | executing, ovewriting the 'regular' SIGINT signal handler. */ |
2587 | static void |
2588 | initialize_sigint_signal_handler (void) |
2589 | { |
2590 | sigint_remote_token = |
2591 | create_async_signal_handler (async_remote_interrupt, NULL((void*)0)); |
2592 | signal (SIGINT2, handle_remote_sigint); |
2593 | } |
2594 | |
2595 | /* Signal handler for SIGINT, while the target is executing. */ |
2596 | static void |
2597 | handle_remote_sigint (int sig) |
2598 | { |
2599 | signal (sig, handle_remote_sigint_twice); |
2600 | sigint_remote_twice_token = |
2601 | create_async_signal_handler (async_remote_interrupt_twice, NULL((void*)0)); |
2602 | mark_async_signal_handler_wrapper (sigint_remote_token); |
2603 | } |
2604 | |
2605 | /* Signal handler for SIGINT, installed after SIGINT has already been |
2606 | sent once. It will take effect the second time that the user sends |
2607 | a ^C. */ |
2608 | static void |
2609 | handle_remote_sigint_twice (int sig) |
2610 | { |
2611 | signal (sig, handle_sigint); |
2612 | sigint_remote_twice_token = |
2613 | create_async_signal_handler (inferior_event_handler_wrapper, NULL((void*)0)); |
2614 | mark_async_signal_handler_wrapper (sigint_remote_twice_token); |
2615 | } |
2616 | |
2617 | /* Perform the real interruption of the target execution, in response |
2618 | to a ^C. */ |
2619 | static void |
2620 | async_remote_interrupt (gdb_client_data arg) |
2621 | { |
2622 | if (remote_debug) |
2623 | fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n"); |
2624 | |
2625 | target_stopcurrent_target.to_stop (); |
2626 | } |
2627 | |
2628 | /* Perform interrupt, if the first attempt did not succeed. Just give |
2629 | up on the target alltogether. */ |
2630 | void |
2631 | async_remote_interrupt_twice (gdb_client_data arg) |
2632 | { |
2633 | if (remote_debug) |
2634 | fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n"); |
2635 | /* Do something only if the target was not killed by the previous |
2636 | cntl-C. */ |
2637 | if (target_executing) |
2638 | { |
2639 | interrupt_query (); |
2640 | signal (SIGINT2, handle_remote_sigint); |
2641 | } |
2642 | } |
2643 | |
2644 | /* Reinstall the usual SIGINT handlers, after the target has |
2645 | stopped. */ |
2646 | static void |
2647 | cleanup_sigint_signal_handler (void *dummy) |
2648 | { |
2649 | signal (SIGINT2, handle_sigint); |
2650 | if (sigint_remote_twice_token) |
2651 | delete_async_signal_handler ((struct async_signal_handler **) & sigint_remote_twice_token); |
2652 | if (sigint_remote_token) |
2653 | delete_async_signal_handler ((struct async_signal_handler **) & sigint_remote_token); |
2654 | } |
2655 | |
2656 | /* Send ^C to target to halt it. Target will respond, and send us a |
2657 | packet. */ |
2658 | static void (*ofunc) (int); |
2659 | |
2660 | /* The command line interface's stop routine. This function is installed |
2661 | as a signal handler for SIGINT. The first time a user requests a |
2662 | stop, we call remote_stop to send a break or ^C. If there is no |
2663 | response from the target (it didn't stop when the user requested it), |
2664 | we ask the user if he'd like to detach from the target. */ |
2665 | static void |
2666 | remote_interrupt (int signo) |
2667 | { |
2668 | /* If this doesn't work, try more severe steps. */ |
2669 | signal (signo, remote_interrupt_twice); |
2670 | |
2671 | if (remote_debug) |
2672 | fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n"); |
2673 | |
2674 | target_stopcurrent_target.to_stop (); |
2675 | } |
2676 | |
2677 | /* The user typed ^C twice. */ |
2678 | |
2679 | static void |
2680 | remote_interrupt_twice (int signo) |
2681 | { |
2682 | signal (signo, ofunc); |
2683 | interrupt_query (); |
2684 | signal (signo, remote_interrupt); |
2685 | } |
2686 | |
2687 | /* This is the generic stop called via the target vector. When a target |
2688 | interrupt is requested, either by the command line or the GUI, we |
2689 | will eventually end up here. */ |
2690 | static void |
2691 | remote_stop (void) |
2692 | { |
2693 | /* Send a break or a ^C, depending on user preference. */ |
2694 | if (remote_debug) |
2695 | fprintf_unfiltered (gdb_stdlog, "remote_stop called\n"); |
2696 | |
2697 | if (remote_break) |
2698 | serial_send_break (remote_desc); |
2699 | else |
2700 | serial_write (remote_desc, "\003", 1); |
2701 | } |
2702 | |
2703 | /* Ask the user what to do when an interrupt is received. */ |
2704 | |
2705 | static void |
2706 | interrupt_query (void) |
2707 | { |
2708 | target_terminal_ours ()(*current_target.to_terminal_ours) (); |
2709 | |
2710 | if (query ("Interrupted while waiting for the program.\n\ |
2711 | Give up (and stop debugging it)? ")) |
2712 | { |
2713 | target_mourn_inferior ()(*current_target.to_mourn_inferior) (); |
2714 | throw_exception (RETURN_QUIT); |
2715 | } |
2716 | |
2717 | target_terminal_inferior ()(*current_target.to_terminal_inferior) (); |
2718 | } |
2719 | |
2720 | /* Enable/disable target terminal ownership. Most targets can use |
2721 | terminal groups to control terminal ownership. Remote targets are |
2722 | different in that explicit transfer of ownership to/from GDB/target |
2723 | is required. */ |
2724 | |
2725 | static void |
2726 | remote_async_terminal_inferior (void) |
2727 | { |
2728 | /* FIXME: cagney/1999-09-27: Shouldn't need to test for |
2729 | sync_execution here. This function should only be called when |
2730 | GDB is resuming the inferior in the forground. A background |
2731 | resume (``run&'') should leave GDB in control of the terminal and |
2732 | consequently should not call this code. */ |
2733 | if (!sync_execution) |
2734 | return; |
2735 | /* FIXME: cagney/1999-09-27: Closely related to the above. Make |
2736 | calls target_terminal_*() idenpotent. The event-loop GDB talking |
2737 | to an asynchronous target with a synchronous command calls this |
2738 | function from both event-top.c and infrun.c/infcmd.c. Once GDB |
2739 | stops trying to transfer the terminal to the target when it |
2740 | shouldn't this guard can go away. */ |
2741 | if (!remote_async_terminal_ours_p) |
2742 | return; |
2743 | delete_file_handler (input_fd); |
2744 | remote_async_terminal_ours_p = 0; |
2745 | initialize_sigint_signal_handler (); |
2746 | /* NOTE: At this point we could also register our selves as the |
2747 | recipient of all input. Any characters typed could then be |
2748 | passed on down to the target. */ |
2749 | } |
2750 | |
2751 | static void |
2752 | remote_async_terminal_ours (void) |
2753 | { |
2754 | /* See FIXME in remote_async_terminal_inferior. */ |
2755 | if (!sync_execution) |
2756 | return; |
2757 | /* See FIXME in remote_async_terminal_inferior. */ |
2758 | if (remote_async_terminal_ours_p) |
2759 | return; |
2760 | cleanup_sigint_signal_handler (NULL((void*)0)); |
2761 | add_file_handler (input_fd, stdin_event_handler, 0); |
2762 | remote_async_terminal_ours_p = 1; |
2763 | } |
2764 | |
2765 | /* If nonzero, ignore the next kill. */ |
2766 | |
2767 | int kill_kludge; |
2768 | |
2769 | void |
2770 | remote_console_output (char *msg) |
2771 | { |
2772 | char *p; |
2773 | |
2774 | for (p = msg; p[0] && p[1]; p += 2) |
2775 | { |
2776 | char tb[2]; |
2777 | char c = fromhex (p[0]) * 16 + fromhex (p[1]); |
2778 | tb[0] = c; |
2779 | tb[1] = 0; |
2780 | fputs_unfiltered (tb, gdb_stdtarg); |
2781 | } |
2782 | gdb_flush (gdb_stdtarg); |
2783 | } |
2784 | |
2785 | /* Wait until the remote machine stops, then return, |
2786 | storing status in STATUS just as `wait' would. |
2787 | Returns "pid", which in the case of a multi-threaded |
2788 | remote OS, is the thread-id. */ |
2789 | |
2790 | static ptid_t |
2791 | remote_wait (ptid_t ptid, struct target_waitstatus *status) |
2792 | { |
2793 | struct remote_state *rs = get_remote_state (); |
2794 | unsigned char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
2795 | ULONGESTunsigned long thread_num = -1; |
2796 | ULONGESTunsigned long addr; |
2797 | |
2798 | status->kind = TARGET_WAITKIND_EXITED; |
2799 | status->value.integer = 0; |
2800 | |
2801 | while (1) |
2802 | { |
2803 | unsigned char *p; |
2804 | |
2805 | ofunc = signal (SIGINT2, remote_interrupt); |
2806 | getpkt (buf, (rs->remote_packet_size), 1); |
2807 | signal (SIGINT2, ofunc); |
2808 | |
2809 | /* This is a hook for when we need to do something (perhaps the |
2810 | collection of trace data) every time the target stops. */ |
2811 | if (deprecated_target_wait_loop_hook) |
2812 | (*deprecated_target_wait_loop_hook) (); |
2813 | |
2814 | remote_stopped_by_watchpoint_p = 0; |
2815 | |
2816 | switch (buf[0]) |
2817 | { |
2818 | case 'E': /* Error of some sort */ |
2819 | warning ("Remote failure reply: %s", buf); |
2820 | continue; |
2821 | case 'F': /* File-I/O request */ |
2822 | remote_fileio_request (buf); |
2823 | continue; |
2824 | case 'T': /* Status with PC, SP, FP, ... */ |
2825 | { |
2826 | int i; |
2827 | char regs[MAX_REGISTER_SIZE]; |
2828 | |
2829 | /* Expedited reply, containing Signal, {regno, reg} repeat */ |
2830 | /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where |
2831 | ss = signal number |
2832 | n... = register number |
2833 | r... = register contents |
2834 | */ |
2835 | p = &buf[3]; /* after Txx */ |
2836 | |
2837 | while (*p) |
2838 | { |
2839 | unsigned char *p1; |
2840 | char *p_temp; |
2841 | int fieldsize; |
2842 | LONGESTlong pnum = 0; |
2843 | |
2844 | /* If the packet contains a register number save it in pnum |
2845 | and set p1 to point to the character following it. |
2846 | Otherwise p1 points to p. */ |
2847 | |
2848 | /* If this packet is an awatch packet, don't parse the 'a' |
2849 | as a register number. */ |
2850 | |
2851 | if (strncmp (p, "awatch", strlen("awatch")) != 0) |
2852 | { |
2853 | /* Read the ``P'' register number. */ |
2854 | pnum = strtol (p, &p_temp, 16); |
2855 | p1 = (unsigned char *) p_temp; |
2856 | } |
2857 | else |
2858 | p1 = p; |
2859 | |
2860 | if (p1 == p) /* No register number present here */ |
2861 | { |
2862 | p1 = (unsigned char *) strchr (p, ':'); |
2863 | if (p1 == NULL((void*)0)) |
2864 | warning ("Malformed packet(a) (missing colon): %s\n\ |
2865 | Packet: '%s'\n", |
2866 | p, buf); |
2867 | if (strncmp (p, "thread", p1 - p) == 0) |
2868 | { |
2869 | p_temp = unpack_varlen_hex (++p1, &thread_num); |
2870 | record_currthread (thread_num); |
2871 | p = (unsigned char *) p_temp; |
2872 | } |
2873 | else if ((strncmp (p, "watch", p1 - p) == 0) |
2874 | || (strncmp (p, "rwatch", p1 - p) == 0) |
2875 | || (strncmp (p, "awatch", p1 - p) == 0)) |
2876 | { |
2877 | remote_stopped_by_watchpoint_p = 1; |
2878 | p = unpack_varlen_hex (++p1, &addr); |
2879 | remote_watch_data_address = (CORE_ADDR)addr; |
2880 | } |
2881 | else |
2882 | { |
2883 | /* Silently skip unknown optional info. */ |
2884 | p_temp = strchr (p1 + 1, ';'); |
2885 | if (p_temp) |
2886 | p = (unsigned char *) p_temp; |
2887 | } |
2888 | } |
2889 | else |
2890 | { |
2891 | struct packet_reg *reg = packet_reg_from_pnum (rs, pnum); |
2892 | p = p1; |
2893 | |
2894 | if (*p++ != ':') |
2895 | error ("Malformed packet(b) (missing colon): %s\nPacket: '%s'\n", |
2896 | p, buf); |
2897 | |
2898 | if (reg == NULL((void*)0)) |
2899 | error ("Remote sent bad register number %s: %s\nPacket: '%s'\n", |
2900 | phex_nz (pnum, 0), p, buf); |
2901 | |
2902 | fieldsize = hex2bin (p, regs, register_size (current_gdbarch, reg->regnum)); |
2903 | p += 2 * fieldsize; |
2904 | if (fieldsize < register_size (current_gdbarch, reg->regnum)) |
2905 | warning ("Remote reply is too short: %s", buf); |
2906 | regcache_raw_supply (current_regcache, reg->regnum, regs); |
2907 | } |
2908 | |
2909 | if (*p++ != ';') |
2910 | error ("Remote register badly formatted: %s\nhere: %s", buf, p); |
2911 | } |
2912 | } |
2913 | /* fall through */ |
2914 | case 'S': /* Old style status, just signal only */ |
2915 | status->kind = TARGET_WAITKIND_STOPPED; |
2916 | status->value.sig = (enum target_signal) |
2917 | (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); |
2918 | |
2919 | if (buf[3] == 'p') |
2920 | { |
2921 | thread_num = strtol ((const char *) &buf[4], NULL((void*)0), 16); |
2922 | record_currthread (thread_num); |
2923 | } |
2924 | goto got_status; |
2925 | case 'W': /* Target exited */ |
2926 | { |
2927 | /* The remote process exited. */ |
2928 | status->kind = TARGET_WAITKIND_EXITED; |
2929 | status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]); |
2930 | goto got_status; |
2931 | } |
2932 | case 'X': |
2933 | status->kind = TARGET_WAITKIND_SIGNALLED; |
2934 | status->value.sig = (enum target_signal) |
2935 | (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); |
2936 | kill_kludge = 1; |
2937 | |
2938 | goto got_status; |
2939 | case 'O': /* Console output */ |
2940 | remote_console_output (buf + 1); |
2941 | continue; |
2942 | case '\0': |
2943 | if (last_sent_signal != TARGET_SIGNAL_0) |
2944 | { |
2945 | /* Zero length reply means that we tried 'S' or 'C' and |
2946 | the remote system doesn't support it. */ |
2947 | target_terminal_ours_for_output ()(*current_target.to_terminal_ours_for_output) (); |
2948 | printf_filtered |
2949 | ("Can't send signals to this remote system. %s not sent.\n", |
2950 | target_signal_to_name (last_sent_signal)); |
2951 | last_sent_signal = TARGET_SIGNAL_0; |
2952 | target_terminal_inferior ()(*current_target.to_terminal_inferior) (); |
2953 | |
2954 | strcpy ((char *) buf, last_sent_step ? "s" : "c"); |
2955 | putpkt ((char *) buf); |
2956 | continue; |
2957 | } |
2958 | /* else fallthrough */ |
2959 | default: |
2960 | warning ("Invalid remote reply: %s", buf); |
2961 | continue; |
2962 | } |
2963 | } |
2964 | got_status: |
2965 | if (thread_num != -1) |
2966 | { |
2967 | return pid_to_ptid (thread_num); |
2968 | } |
2969 | return inferior_ptid; |
2970 | } |
2971 | |
2972 | /* Async version of remote_wait. */ |
2973 | static ptid_t |
2974 | remote_async_wait (ptid_t ptid, struct target_waitstatus *status) |
2975 | { |
2976 | struct remote_state *rs = get_remote_state (); |
2977 | unsigned char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
2978 | ULONGESTunsigned long thread_num = -1; |
2979 | ULONGESTunsigned long addr; |
2980 | |
2981 | status->kind = TARGET_WAITKIND_EXITED; |
2982 | status->value.integer = 0; |
2983 | |
2984 | remote_stopped_by_watchpoint_p = 0; |
2985 | |
2986 | while (1) |
2987 | { |
2988 | unsigned char *p; |
2989 | |
2990 | if (!target_is_async_p ()(current_target.to_is_async_p())) |
2991 | ofunc = signal (SIGINT2, remote_interrupt); |
2992 | /* FIXME: cagney/1999-09-27: If we're in async mode we should |
2993 | _never_ wait for ever -> test on target_is_async_p(). |
2994 | However, before we do that we need to ensure that the caller |
2995 | knows how to take the target into/out of async mode. */ |
2996 | getpkt (buf, (rs->remote_packet_size), wait_forever_enabled_p); |
2997 | if (!target_is_async_p ()(current_target.to_is_async_p())) |
2998 | signal (SIGINT2, ofunc); |
2999 | |
3000 | /* This is a hook for when we need to do something (perhaps the |
3001 | collection of trace data) every time the target stops. */ |
3002 | if (deprecated_target_wait_loop_hook) |
3003 | (*deprecated_target_wait_loop_hook) (); |
3004 | |
3005 | switch (buf[0]) |
3006 | { |
3007 | case 'E': /* Error of some sort */ |
3008 | warning ("Remote failure reply: %s", buf); |
3009 | continue; |
3010 | case 'F': /* File-I/O request */ |
3011 | remote_fileio_request (buf); |
3012 | continue; |
3013 | case 'T': /* Status with PC, SP, FP, ... */ |
3014 | { |
3015 | int i; |
3016 | char regs[MAX_REGISTER_SIZE]; |
3017 | |
3018 | /* Expedited reply, containing Signal, {regno, reg} repeat */ |
3019 | /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where |
3020 | ss = signal number |
3021 | n... = register number |
3022 | r... = register contents |
3023 | */ |
3024 | p = &buf[3]; /* after Txx */ |
3025 | |
3026 | while (*p) |
3027 | { |
3028 | unsigned char *p1; |
3029 | char *p_temp; |
3030 | int fieldsize; |
3031 | long pnum = 0; |
3032 | |
3033 | /* If the packet contains a register number, save it in pnum |
3034 | and set p1 to point to the character following it. |
3035 | Otherwise p1 points to p. */ |
3036 | |
3037 | /* If this packet is an awatch packet, don't parse the 'a' |
3038 | as a register number. */ |
3039 | |
3040 | if (!strncmp (p, "awatch", strlen ("awatch")) != 0) |
3041 | { |
3042 | /* Read the register number. */ |
3043 | pnum = strtol (p, &p_temp, 16); |
3044 | p1 = (unsigned char *) p_temp; |
3045 | } |
3046 | else |
3047 | p1 = p; |
3048 | |
3049 | if (p1 == p) /* No register number present here */ |
3050 | { |
3051 | p1 = (unsigned char *) strchr (p, ':'); |
3052 | if (p1 == NULL((void*)0)) |
3053 | error ("Malformed packet(a) (missing colon): %s\nPacket: '%s'\n", |
3054 | p, buf); |
3055 | if (strncmp (p, "thread", p1 - p) == 0) |
3056 | { |
3057 | p_temp = unpack_varlen_hex (++p1, &thread_num); |
3058 | record_currthread (thread_num); |
3059 | p = (unsigned char *) p_temp; |
3060 | } |
3061 | else if ((strncmp (p, "watch", p1 - p) == 0) |
3062 | || (strncmp (p, "rwatch", p1 - p) == 0) |
3063 | || (strncmp (p, "awatch", p1 - p) == 0)) |
3064 | { |
3065 | remote_stopped_by_watchpoint_p = 1; |
3066 | p = unpack_varlen_hex (++p1, &addr); |
3067 | remote_watch_data_address = (CORE_ADDR)addr; |
3068 | } |
3069 | else |
3070 | { |
3071 | /* Silently skip unknown optional info. */ |
3072 | p_temp = (unsigned char *) strchr (p1 + 1, ';'); |
3073 | if (p_temp) |
3074 | p = p_temp; |
3075 | } |
3076 | } |
3077 | |
3078 | else |
3079 | { |
3080 | struct packet_reg *reg = packet_reg_from_pnum (rs, pnum); |
3081 | p = p1; |
3082 | if (*p++ != ':') |
3083 | error ("Malformed packet(b) (missing colon): %s\nPacket: '%s'\n", |
3084 | p, buf); |
3085 | |
3086 | if (reg == NULL((void*)0)) |
3087 | error ("Remote sent bad register number %ld: %s\nPacket: '%s'\n", |
3088 | pnum, p, buf); |
3089 | |
3090 | fieldsize = hex2bin (p, regs, register_size (current_gdbarch, reg->regnum)); |
3091 | p += 2 * fieldsize; |
3092 | if (fieldsize < register_size (current_gdbarch, reg->regnum)) |
3093 | warning ("Remote reply is too short: %s", buf); |
3094 | regcache_raw_supply (current_regcache, reg->regnum, regs); |
3095 | } |
3096 | |
3097 | if (*p++ != ';') |
3098 | error ("Remote register badly formatted: %s\nhere: %s", |
3099 | buf, p); |
3100 | } |
3101 | } |
3102 | /* fall through */ |
3103 | case 'S': /* Old style status, just signal only */ |
3104 | status->kind = TARGET_WAITKIND_STOPPED; |
3105 | status->value.sig = (enum target_signal) |
3106 | (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); |
3107 | |
3108 | if (buf[3] == 'p') |
3109 | { |
3110 | thread_num = strtol ((const char *) &buf[4], NULL((void*)0), 16); |
3111 | record_currthread (thread_num); |
3112 | } |
3113 | goto got_status; |
3114 | case 'W': /* Target exited */ |
3115 | { |
3116 | /* The remote process exited. */ |
3117 | status->kind = TARGET_WAITKIND_EXITED; |
3118 | status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]); |
3119 | goto got_status; |
3120 | } |
3121 | case 'X': |
3122 | status->kind = TARGET_WAITKIND_SIGNALLED; |
3123 | status->value.sig = (enum target_signal) |
3124 | (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); |
3125 | kill_kludge = 1; |
3126 | |
3127 | goto got_status; |
3128 | case 'O': /* Console output */ |
3129 | remote_console_output (buf + 1); |
3130 | /* Return immediately to the event loop. The event loop will |
3131 | still be waiting on the inferior afterwards. */ |
3132 | status->kind = TARGET_WAITKIND_IGNORE; |
3133 | goto got_status; |
3134 | case '\0': |
3135 | if (last_sent_signal != TARGET_SIGNAL_0) |
3136 | { |
3137 | /* Zero length reply means that we tried 'S' or 'C' and |
3138 | the remote system doesn't support it. */ |
3139 | target_terminal_ours_for_output ()(*current_target.to_terminal_ours_for_output) (); |
3140 | printf_filtered |
3141 | ("Can't send signals to this remote system. %s not sent.\n", |
3142 | target_signal_to_name (last_sent_signal)); |
3143 | last_sent_signal = TARGET_SIGNAL_0; |
3144 | target_terminal_inferior ()(*current_target.to_terminal_inferior) (); |
3145 | |
3146 | strcpy ((char *) buf, last_sent_step ? "s" : "c"); |
3147 | putpkt ((char *) buf); |
3148 | continue; |
3149 | } |
3150 | /* else fallthrough */ |
3151 | default: |
3152 | warning ("Invalid remote reply: %s", buf); |
3153 | continue; |
3154 | } |
3155 | } |
3156 | got_status: |
3157 | if (thread_num != -1) |
3158 | { |
3159 | return pid_to_ptid (thread_num); |
3160 | } |
3161 | return inferior_ptid; |
3162 | } |
3163 | |
3164 | /* Number of bytes of registers this stub implements. */ |
3165 | |
3166 | static int register_bytes_found; |
3167 | |
3168 | /* Read the remote registers into the block REGS. */ |
3169 | /* Currently we just read all the registers, so we don't use regnum. */ |
3170 | |
3171 | static int |
3172 | fetch_register_using_p (int regnum) |
3173 | { |
3174 | struct remote_state *rs = get_remote_state (); |
3175 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size), *p; |
3176 | char regp[MAX_REGISTER_SIZE]; |
3177 | int i; |
3178 | |
3179 | p = buf; |
3180 | *p++ = 'p'; |
3181 | p += hexnumstr (p, regnum); |
3182 | *p++ = '\0'; |
3183 | remote_send (buf, rs->remote_packet_size); |
3184 | if (buf[0] != 0 && buf[0] != 'E') { |
3185 | p = buf; |
3186 | i = 0; |
3187 | while (p[0] != 0) { |
3188 | if (p[1] == 0) { |
3189 | error("fetch_register_using_p: early buf termination"); |
3190 | return 0; |
3191 | } |
3192 | regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]); |
3193 | p += 2; |
3194 | } |
3195 | regcache_raw_supply (current_regcache, regnum, regp); |
3196 | return 1; |
3197 | } |
3198 | |
3199 | return 0; |
3200 | } |
3201 | |
3202 | static void |
3203 | remote_fetch_registers (int regnum) |
3204 | { |
3205 | struct remote_state *rs = get_remote_state (); |
3206 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
3207 | int i; |
3208 | char *p; |
3209 | char *regs = alloca (rs->sizeof_g_packet)__builtin_alloca(rs->sizeof_g_packet); |
3210 | |
3211 | set_thread (PIDGET (inferior_ptid)(ptid_get_pid (inferior_ptid)), 1); |
3212 | |
3213 | if (regnum >= 0) |
3214 | { |
3215 | struct packet_reg *reg = packet_reg_from_regnum (rs, regnum); |
3216 | gdb_assert (reg != NULL)((void) ((reg != ((void*)0)) ? 0 : (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/remote.c" , 3216, "%s: Assertion `%s' failed.", __PRETTY_FUNCTION__, "reg != NULL" ), 0))); |
3217 | if (!reg->in_g_packet) |
3218 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/remote.c", __LINE__3218, |
3219 | "Attempt to fetch a non G-packet register when this " |
3220 | "remote.c does not support the p-packet."); |
3221 | } |
3222 | switch (remote_protocol_p.support) |
3223 | { |
3224 | case PACKET_DISABLE: |
3225 | break; |
3226 | case PACKET_ENABLE: |
3227 | if (fetch_register_using_p (regnum)) |
3228 | return; |
3229 | else |
3230 | error ("Protocol error: p packet not recognized by stub"); |
3231 | case PACKET_SUPPORT_UNKNOWN: |
3232 | if (fetch_register_using_p (regnum)) |
3233 | { |
3234 | /* The stub recognized the 'p' packet. Remember this. */ |
3235 | remote_protocol_p.support = PACKET_ENABLE; |
3236 | return; |
3237 | } |
3238 | else |
3239 | { |
3240 | /* The stub does not support the 'P' packet. Use 'G' |
3241 | instead, and don't try using 'P' in the future (it |
3242 | will just waste our time). */ |
3243 | remote_protocol_p.support = PACKET_DISABLE; |
3244 | break; |
3245 | } |
3246 | } |
3247 | |
3248 | sprintf (buf, "g"); |
3249 | remote_send (buf, (rs->remote_packet_size)); |
3250 | |
3251 | /* Save the size of the packet sent to us by the target. Its used |
3252 | as a heuristic when determining the max size of packets that the |
3253 | target can safely receive. */ |
3254 | if ((rs->actual_register_packet_size) == 0) |
3255 | (rs->actual_register_packet_size) = strlen (buf); |
3256 | |
3257 | /* Unimplemented registers read as all bits zero. */ |
3258 | memset (regs, 0, rs->sizeof_g_packet); |
3259 | |
3260 | /* We can get out of synch in various cases. If the first character |
3261 | in the buffer is not a hex character, assume that has happened |
3262 | and try to fetch another packet to read. */ |
3263 | while ((buf[0] < '0' || buf[0] > '9') |
3264 | && (buf[0] < 'a' || buf[0] > 'f') |
3265 | && buf[0] != 'x') /* New: unavailable register value */ |
3266 | { |
3267 | if (remote_debug) |
3268 | fprintf_unfiltered (gdb_stdlog, |
3269 | "Bad register packet; fetching a new packet\n"); |
3270 | getpkt (buf, (rs->remote_packet_size), 0); |
3271 | } |
3272 | |
3273 | /* Reply describes registers byte by byte, each byte encoded as two |
3274 | hex characters. Suck them all up, then supply them to the |
3275 | register cacheing/storage mechanism. */ |
3276 | |
3277 | p = buf; |
3278 | for (i = 0; i < rs->sizeof_g_packet; i++) |
3279 | { |
3280 | if (p[0] == 0) |
3281 | break; |
3282 | if (p[1] == 0) |
3283 | { |
3284 | warning ("Remote reply is of odd length: %s", buf); |
3285 | /* Don't change register_bytes_found in this case, and don't |
3286 | print a second warning. */ |
3287 | goto supply_them; |
3288 | } |
3289 | if (p[0] == 'x' && p[1] == 'x') |
3290 | regs[i] = 0; /* 'x' */ |
3291 | else |
3292 | regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]); |
3293 | p += 2; |
3294 | } |
3295 | |
3296 | if (i != register_bytes_found) |
3297 | { |
3298 | register_bytes_found = i; |
3299 | if (REGISTER_BYTES_OK_P ()(gdbarch_register_bytes_ok_p (current_gdbarch)) |
3300 | && !REGISTER_BYTES_OK (i)(gdbarch_register_bytes_ok (current_gdbarch, i))) |
3301 | warning ("Remote reply is too short: %s", buf); |
3302 | } |
3303 | |
3304 | supply_them: |
3305 | { |
3306 | int i; |
3307 | for (i = 0; i < NUM_REGS(gdbarch_num_regs (current_gdbarch)) + NUM_PSEUDO_REGS(gdbarch_num_pseudo_regs (current_gdbarch)); i++) |
3308 | { |
3309 | struct packet_reg *r = &rs->regs[i]; |
3310 | if (r->in_g_packet) |
3311 | { |
3312 | if (r->offset * 2 >= strlen (buf)) |
3313 | /* A short packet that didn't include the register's |
3314 | value, this implies that the register is zero (and |
3315 | not that the register is unavailable). Supply that |
3316 | zero value. */ |
3317 | regcache_raw_supply (current_regcache, r->regnum, NULL((void*)0)); |
3318 | else if (buf[r->offset * 2] == 'x') |
3319 | { |
3320 | gdb_assert (r->offset * 2 < strlen (buf))((void) ((r->offset * 2 < strlen (buf)) ? 0 : (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/remote.c", 3320, "%s: Assertion `%s' failed." , __PRETTY_FUNCTION__, "r->offset * 2 < strlen (buf)"), 0))); |
3321 | /* The register isn't available, mark it as such (at |
3322 | the same time setting the value to zero). */ |
3323 | regcache_raw_supply (current_regcache, r->regnum, NULL((void*)0)); |
3324 | set_register_cached (i, -1); |
3325 | } |
3326 | else |
3327 | regcache_raw_supply (current_regcache, r->regnum, |
3328 | regs + r->offset); |
3329 | } |
3330 | } |
3331 | } |
3332 | } |
3333 | |
3334 | /* Prepare to store registers. Since we may send them all (using a |
3335 | 'G' request), we have to read out the ones we don't want to change |
3336 | first. */ |
3337 | |
3338 | static void |
3339 | remote_prepare_to_store (void) |
3340 | { |
3341 | struct remote_state *rs = get_remote_state (); |
3342 | int i; |
3343 | char buf[MAX_REGISTER_SIZE]; |
3344 | |
3345 | /* Make sure the entire registers array is valid. */ |
3346 | switch (remote_protocol_P.support) |
3347 | { |
3348 | case PACKET_DISABLE: |
3349 | case PACKET_SUPPORT_UNKNOWN: |
3350 | /* Make sure all the necessary registers are cached. */ |
3351 | for (i = 0; i < NUM_REGS(gdbarch_num_regs (current_gdbarch)); i++) |
3352 | if (rs->regs[i].in_g_packet) |
3353 | regcache_raw_read (current_regcache, rs->regs[i].regnum, buf); |
3354 | break; |
3355 | case PACKET_ENABLE: |
3356 | break; |
3357 | } |
3358 | } |
3359 | |
3360 | /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF |
3361 | packet was not recognized. */ |
3362 | |
3363 | static int |
3364 | store_register_using_P (int regnum) |
3365 | { |
3366 | struct remote_state *rs = get_remote_state (); |
3367 | struct packet_reg *reg = packet_reg_from_regnum (rs, regnum); |
3368 | /* Try storing a single register. */ |
3369 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
3370 | char regp[MAX_REGISTER_SIZE]; |
3371 | char *p; |
3372 | int i; |
3373 | |
3374 | sprintf (buf, "P%s=", phex_nz (reg->pnum, 0)); |
3375 | p = buf + strlen (buf); |
3376 | regcache_raw_collect (current_regcache, reg->regnum, regp); |
3377 | bin2hex (regp, p, register_size (current_gdbarch, reg->regnum)); |
3378 | remote_send (buf, rs->remote_packet_size); |
3379 | |
3380 | return buf[0] != '\0'; |
3381 | } |
3382 | |
3383 | |
3384 | /* Store register REGNUM, or all registers if REGNUM == -1, from the contents |
3385 | of the register cache buffer. FIXME: ignores errors. */ |
3386 | |
3387 | static void |
3388 | remote_store_registers (int regnum) |
3389 | { |
3390 | struct remote_state *rs = get_remote_state (); |
3391 | char *buf; |
3392 | char *regs; |
3393 | int i; |
3394 | char *p; |
3395 | |
3396 | set_thread (PIDGET (inferior_ptid)(ptid_get_pid (inferior_ptid)), 1); |
3397 | |
3398 | if (regnum >= 0) |
3399 | { |
3400 | switch (remote_protocol_P.support) |
3401 | { |
3402 | case PACKET_DISABLE: |
3403 | break; |
3404 | case PACKET_ENABLE: |
3405 | if (store_register_using_P (regnum)) |
3406 | return; |
3407 | else |
3408 | error ("Protocol error: P packet not recognized by stub"); |
3409 | case PACKET_SUPPORT_UNKNOWN: |
3410 | if (store_register_using_P (regnum)) |
3411 | { |
3412 | /* The stub recognized the 'P' packet. Remember this. */ |
3413 | remote_protocol_P.support = PACKET_ENABLE; |
3414 | return; |
3415 | } |
3416 | else |
3417 | { |
3418 | /* The stub does not support the 'P' packet. Use 'G' |
3419 | instead, and don't try using 'P' in the future (it |
3420 | will just waste our time). */ |
3421 | remote_protocol_P.support = PACKET_DISABLE; |
3422 | break; |
3423 | } |
3424 | } |
3425 | } |
3426 | |
3427 | /* Extract all the registers in the regcache copying them into a |
3428 | local buffer. */ |
3429 | { |
3430 | int i; |
3431 | regs = alloca (rs->sizeof_g_packet)__builtin_alloca(rs->sizeof_g_packet); |
3432 | memset (regs, 0, rs->sizeof_g_packet); |
3433 | for (i = 0; i < NUM_REGS(gdbarch_num_regs (current_gdbarch)) + NUM_PSEUDO_REGS(gdbarch_num_pseudo_regs (current_gdbarch)); i++) |
3434 | { |
3435 | struct packet_reg *r = &rs->regs[i]; |
3436 | if (r->in_g_packet) |
3437 | regcache_raw_collect (current_regcache, r->regnum, regs + r->offset); |
3438 | } |
3439 | } |
3440 | |
3441 | /* Command describes registers byte by byte, |
3442 | each byte encoded as two hex characters. */ |
3443 | buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
3444 | p = buf; |
3445 | *p++ = 'G'; |
3446 | /* remote_prepare_to_store insures that register_bytes_found gets set. */ |
3447 | bin2hex (regs, p, register_bytes_found); |
3448 | remote_send (buf, (rs->remote_packet_size)); |
3449 | } |
3450 | |
3451 | |
3452 | /* Return the number of hex digits in num. */ |
3453 | |
3454 | static int |
3455 | hexnumlen (ULONGESTunsigned long num) |
3456 | { |
3457 | int i; |
3458 | |
3459 | for (i = 0; num != 0; i++) |
3460 | num >>= 4; |
3461 | |
3462 | return max (i, 1)((i) > (1) ? (i) : (1)); |
3463 | } |
3464 | |
3465 | /* Set BUF to the minimum number of hex digits representing NUM. */ |
3466 | |
3467 | static int |
3468 | hexnumstr (char *buf, ULONGESTunsigned long num) |
3469 | { |
3470 | int len = hexnumlen (num); |
3471 | return hexnumnstr (buf, num, len); |
3472 | } |
3473 | |
3474 | |
3475 | /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */ |
3476 | |
3477 | static int |
3478 | hexnumnstr (char *buf, ULONGESTunsigned long num, int width) |
3479 | { |
3480 | int i; |
3481 | |
3482 | buf[width] = '\0'; |
3483 | |
3484 | for (i = width - 1; i >= 0; i--) |
3485 | { |
3486 | buf[i] = "0123456789abcdef"[(num & 0xf)]; |
3487 | num >>= 4; |
3488 | } |
3489 | |
3490 | return width; |
3491 | } |
3492 | |
3493 | /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */ |
3494 | |
3495 | static CORE_ADDR |
3496 | remote_address_masked (CORE_ADDR addr) |
3497 | { |
3498 | if (remote_address_size > 0 |
3499 | && remote_address_size < (sizeof (ULONGESTunsigned long) * 8)) |
3500 | { |
3501 | /* Only create a mask when that mask can safely be constructed |
3502 | in a ULONGEST variable. */ |
3503 | ULONGESTunsigned long mask = 1; |
3504 | mask = (mask << remote_address_size) - 1; |
3505 | addr &= mask; |
3506 | } |
3507 | return addr; |
3508 | } |
3509 | |
3510 | /* Determine whether the remote target supports binary downloading. |
3511 | This is accomplished by sending a no-op memory write of zero length |
3512 | to the target at the specified address. It does not suffice to send |
3513 | the whole packet, since many stubs strip the eighth bit and subsequently |
3514 | compute a wrong checksum, which causes real havoc with remote_write_bytes. |
3515 | |
3516 | NOTE: This can still lose if the serial line is not eight-bit |
3517 | clean. In cases like this, the user should clear "remote |
3518 | X-packet". */ |
3519 | |
3520 | static void |
3521 | check_binary_download (CORE_ADDR addr) |
3522 | { |
3523 | struct remote_state *rs = get_remote_state (); |
3524 | switch (remote_protocol_binary_download.support) |
3525 | { |
3526 | case PACKET_DISABLE: |
3527 | break; |
3528 | case PACKET_ENABLE: |
3529 | break; |
3530 | case PACKET_SUPPORT_UNKNOWN: |
3531 | { |
3532 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
3533 | char *p; |
3534 | |
3535 | p = buf; |
3536 | *p++ = 'X'; |
3537 | p += hexnumstr (p, (ULONGESTunsigned long) addr); |
3538 | *p++ = ','; |
3539 | p += hexnumstr (p, (ULONGESTunsigned long) 0); |
3540 | *p++ = ':'; |
3541 | *p = '\0'; |
3542 | |
3543 | putpkt_binary (buf, (int) (p - buf)); |
3544 | getpkt (buf, (rs->remote_packet_size), 0); |
3545 | |
3546 | if (buf[0] == '\0') |
3547 | { |
3548 | if (remote_debug) |
3549 | fprintf_unfiltered (gdb_stdlog, |
3550 | "binary downloading NOT suppported by target\n"); |
3551 | remote_protocol_binary_download.support = PACKET_DISABLE; |
3552 | } |
3553 | else |
3554 | { |
3555 | if (remote_debug) |
3556 | fprintf_unfiltered (gdb_stdlog, |
3557 | "binary downloading suppported by target\n"); |
3558 | remote_protocol_binary_download.support = PACKET_ENABLE; |
3559 | } |
3560 | break; |
3561 | } |
3562 | } |
3563 | } |
3564 | |
3565 | /* Write memory data directly to the remote machine. |
3566 | This does not inform the data cache; the data cache uses this. |
3567 | MEMADDR is the address in the remote memory space. |
3568 | MYADDR is the address of the buffer in our space. |
3569 | LEN is the number of bytes. |
3570 | |
3571 | Returns number of bytes transferred, or 0 (setting errno) for |
3572 | error. Only transfer a single packet. */ |
3573 | |
3574 | int |
3575 | remote_write_bytes (CORE_ADDR memaddr, char *myaddr, int len) |
3576 | { |
3577 | unsigned char *buf; |
3578 | unsigned char *p; |
3579 | unsigned char *plen; |
3580 | long sizeof_buf; |
3581 | int plenlen; |
3582 | int todo; |
3583 | int nr_bytes; |
3584 | int payload_size; |
3585 | unsigned char *payload_start; |
3586 | |
3587 | /* Verify that the target can support a binary download. */ |
3588 | check_binary_download (memaddr); |
3589 | |
3590 | /* Compute the size, and then allocate space for the largest |
3591 | possible packet. Include space for an extra trailing NUL. */ |
3592 | sizeof_buf = get_memory_write_packet_size () + 1; |
3593 | buf = alloca (sizeof_buf)__builtin_alloca(sizeof_buf); |
3594 | |
3595 | /* Compute the size of the actual payload by subtracting out the |
3596 | packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */ |
3597 | payload_size = (get_memory_write_packet_size () - (strlen ("$M,:#NN") |
3598 | + hexnumlen (memaddr) |
3599 | + hexnumlen (len))); |
3600 | |
3601 | /* Construct the packet header: "[MX]<memaddr>,<len>:". */ |
3602 | |
3603 | /* Append "[XM]". Compute a best guess of the number of bytes |
3604 | actually transfered. */ |
3605 | p = buf; |
3606 | switch (remote_protocol_binary_download.support) |
3607 | { |
3608 | case PACKET_ENABLE: |
3609 | *p++ = 'X'; |
3610 | /* Best guess at number of bytes that will fit. */ |
3611 | todo = min (len, payload_size)((len) < (payload_size) ? (len) : (payload_size)); |
3612 | break; |
3613 | case PACKET_DISABLE: |
3614 | *p++ = 'M'; |
3615 | /* num bytes that will fit */ |
3616 | todo = min (len, payload_size / 2)((len) < (payload_size / 2) ? (len) : (payload_size / 2)); |
3617 | break; |
3618 | case PACKET_SUPPORT_UNKNOWN: |
3619 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/remote.c", __LINE__3619, |
3620 | "remote_write_bytes: bad internal state"); |
3621 | default: |
3622 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/remote.c", __LINE__3622, "bad switch"); |
3623 | } |
3624 | |
3625 | /* Append "<memaddr>". */ |
3626 | memaddr = remote_address_masked (memaddr); |
3627 | p += hexnumstr (p, (ULONGESTunsigned long) memaddr); |
3628 | |
3629 | /* Append ",". */ |
3630 | *p++ = ','; |
3631 | |
3632 | /* Append <len>. Retain the location/size of <len>. It may need to |
3633 | be adjusted once the packet body has been created. */ |
3634 | plen = p; |
3635 | plenlen = hexnumstr (p, (ULONGESTunsigned long) todo); |
3636 | p += plenlen; |
3637 | |
3638 | /* Append ":". */ |
3639 | *p++ = ':'; |
3640 | *p = '\0'; |
3641 | |
3642 | /* Append the packet body. */ |
3643 | payload_start = p; |
3644 | switch (remote_protocol_binary_download.support) |
3645 | { |
3646 | case PACKET_ENABLE: |
3647 | /* Binary mode. Send target system values byte by byte, in |
3648 | increasing byte addresses. Only escape certain critical |
3649 | characters. */ |
3650 | for (nr_bytes = 0; |
3651 | (nr_bytes < todo) && (p - payload_start) < payload_size; |
3652 | nr_bytes++) |
3653 | { |
3654 | switch (myaddr[nr_bytes] & 0xff) |
3655 | { |
3656 | case '$': |
3657 | case '#': |
3658 | case 0x7d: |
3659 | /* These must be escaped */ |
3660 | *p++ = 0x7d; |
3661 | *p++ = (myaddr[nr_bytes] & 0xff) ^ 0x20; |
3662 | break; |
3663 | default: |
3664 | *p++ = myaddr[nr_bytes] & 0xff; |
3665 | break; |
3666 | } |
3667 | } |
3668 | if (nr_bytes < todo) |
3669 | { |
3670 | /* Escape chars have filled up the buffer prematurely, |
3671 | and we have actually sent fewer bytes than planned. |
3672 | Fix-up the length field of the packet. Use the same |
3673 | number of characters as before. */ |
3674 | plen += hexnumnstr (plen, (ULONGESTunsigned long) nr_bytes, plenlen); |
3675 | *plen = ':'; /* overwrite \0 from hexnumnstr() */ |
3676 | } |
3677 | break; |
3678 | case PACKET_DISABLE: |
3679 | /* Normal mode: Send target system values byte by byte, in |
3680 | increasing byte addresses. Each byte is encoded as a two hex |
3681 | value. */ |
3682 | nr_bytes = bin2hex (myaddr, p, todo); |
3683 | p += 2 * nr_bytes; |
3684 | break; |
3685 | case PACKET_SUPPORT_UNKNOWN: |
3686 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/remote.c", __LINE__3686, |
3687 | "remote_write_bytes: bad internal state"); |
3688 | default: |
3689 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/remote.c", __LINE__3689, "bad switch"); |
3690 | } |
3691 | |
3692 | putpkt_binary (buf, (int) (p - buf)); |
3693 | getpkt (buf, sizeof_buf, 0); |
3694 | |
3695 | if (buf[0] == 'E') |
3696 | { |
3697 | /* There is no correspondance between what the remote protocol |
3698 | uses for errors and errno codes. We would like a cleaner way |
3699 | of representing errors (big enough to include errno codes, |
3700 | bfd_error codes, and others). But for now just return EIO. */ |
3701 | errno(*__errno()) = EIO5; |
3702 | return 0; |
3703 | } |
3704 | |
3705 | /* Return NR_BYTES, not TODO, in case escape chars caused us to send fewer |
3706 | bytes than we'd planned. */ |
3707 | return nr_bytes; |
3708 | } |
3709 | |
3710 | /* Read memory data directly from the remote machine. |
3711 | This does not use the data cache; the data cache uses this. |
3712 | MEMADDR is the address in the remote memory space. |
3713 | MYADDR is the address of the buffer in our space. |
3714 | LEN is the number of bytes. |
3715 | |
3716 | Returns number of bytes transferred, or 0 for error. */ |
3717 | |
3718 | /* NOTE: cagney/1999-10-18: This function (and its siblings in other |
3719 | remote targets) shouldn't attempt to read the entire buffer. |
3720 | Instead it should read a single packet worth of data and then |
3721 | return the byte size of that packet to the caller. The caller (its |
3722 | caller and its callers caller ;-) already contains code for |
3723 | handling partial reads. */ |
3724 | |
3725 | int |
3726 | remote_read_bytes (CORE_ADDR memaddr, char *myaddr, int len) |
3727 | { |
3728 | char *buf; |
3729 | int max_buf_size; /* Max size of packet output buffer */ |
3730 | long sizeof_buf; |
3731 | int origlen; |
3732 | |
3733 | /* Create a buffer big enough for this packet. */ |
3734 | max_buf_size = get_memory_read_packet_size (); |
3735 | sizeof_buf = max_buf_size + 1; /* Space for trailing NUL */ |
3736 | buf = alloca (sizeof_buf)__builtin_alloca(sizeof_buf); |
3737 | |
3738 | origlen = len; |
3739 | while (len > 0) |
3740 | { |
3741 | char *p; |
3742 | int todo; |
3743 | int i; |
3744 | |
3745 | todo = min (len, max_buf_size / 2)((len) < (max_buf_size / 2) ? (len) : (max_buf_size / 2)); /* num bytes that will fit */ |
3746 | |
3747 | /* construct "m"<memaddr>","<len>" */ |
3748 | /* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */ |
3749 | memaddr = remote_address_masked (memaddr); |
3750 | p = buf; |
3751 | *p++ = 'm'; |
3752 | p += hexnumstr (p, (ULONGESTunsigned long) memaddr); |
3753 | *p++ = ','; |
3754 | p += hexnumstr (p, (ULONGESTunsigned long) todo); |
3755 | *p = '\0'; |
3756 | |
3757 | putpkt (buf); |
3758 | getpkt (buf, sizeof_buf, 0); |
3759 | |
3760 | if (buf[0] == 'E' |
3761 | && isxdigit (buf[1]) && isxdigit (buf[2]) |
3762 | && buf[3] == '\0') |
3763 | { |
3764 | /* There is no correspondance between what the remote protocol uses |
3765 | for errors and errno codes. We would like a cleaner way of |
3766 | representing errors (big enough to include errno codes, bfd_error |
3767 | codes, and others). But for now just return EIO. */ |
3768 | errno(*__errno()) = EIO5; |
3769 | return 0; |
3770 | } |
3771 | |
3772 | /* Reply describes memory byte by byte, |
3773 | each byte encoded as two hex characters. */ |
3774 | |
3775 | p = buf; |
3776 | if ((i = hex2bin (p, myaddr, todo)) < todo) |
3777 | { |
3778 | /* Reply is short. This means that we were able to read |
3779 | only part of what we wanted to. */ |
3780 | return i + (origlen - len); |
3781 | } |
3782 | myaddr += todo; |
3783 | memaddr += todo; |
3784 | len -= todo; |
3785 | } |
3786 | return origlen; |
3787 | } |
3788 | |
3789 | /* Read or write LEN bytes from inferior memory at MEMADDR, |
3790 | transferring to or from debugger address BUFFER. Write to inferior if |
3791 | SHOULD_WRITE is nonzero. Returns length of data written or read; 0 |
3792 | for error. TARGET is unused. */ |
3793 | |
3794 | static int |
3795 | remote_xfer_memory (CORE_ADDR mem_addr, char *buffer, int mem_len, |
3796 | int should_write, struct mem_attrib *attrib, |
3797 | struct target_ops *target) |
3798 | { |
3799 | CORE_ADDR targ_addr; |
3800 | int targ_len; |
3801 | int res; |
3802 | |
3803 | /* Should this be the selected frame? */ |
3804 | gdbarch_remote_translate_xfer_address (current_gdbarch, current_regcache, |
3805 | mem_addr, mem_len, |
3806 | &targ_addr, &targ_len); |
3807 | if (targ_len <= 0) |
3808 | return 0; |
3809 | |
3810 | if (should_write) |
3811 | res = remote_write_bytes (targ_addr, buffer, targ_len); |
3812 | else |
3813 | res = remote_read_bytes (targ_addr, buffer, targ_len); |
3814 | |
3815 | return res; |
3816 | } |
3817 | |
3818 | static void |
3819 | remote_files_info (struct target_ops *ignore) |
3820 | { |
3821 | puts_filtered ("Debugging a target over a serial line.\n"); |
3822 | } |
3823 | |
3824 | /* Stuff for dealing with the packets which are part of this protocol. |
3825 | See comment at top of file for details. */ |
3826 | |
3827 | /* Read a single character from the remote end, masking it down to 7 bits. */ |
3828 | |
3829 | static int |
3830 | readchar (int timeout) |
3831 | { |
3832 | int ch; |
3833 | |
3834 | ch = serial_readchar (remote_desc, timeout); |
3835 | |
3836 | if (ch >= 0) |
3837 | return (ch & 0x7f); |
3838 | |
3839 | switch ((enum serial_rc) ch) |
3840 | { |
3841 | case SERIAL_EOF: |
3842 | target_mourn_inferior ()(*current_target.to_mourn_inferior) (); |
3843 | error ("Remote connection closed"); |
3844 | /* no return */ |
3845 | case SERIAL_ERROR: |
3846 | perror_with_name ("Remote communication error"); |
3847 | /* no return */ |
3848 | case SERIAL_TIMEOUT: |
3849 | break; |
3850 | } |
3851 | return ch; |
3852 | } |
3853 | |
3854 | /* Send the command in BUF to the remote machine, and read the reply |
3855 | into BUF. Report an error if we get an error reply. */ |
3856 | |
3857 | static void |
3858 | remote_send (char *buf, |
3859 | long sizeof_buf) |
3860 | { |
3861 | putpkt (buf); |
3862 | getpkt (buf, sizeof_buf, 0); |
3863 | |
3864 | if (buf[0] == 'E') |
3865 | error ("Remote failure reply: %s", buf); |
3866 | } |
3867 | |
3868 | /* Display a null-terminated packet on stdout, for debugging, using C |
3869 | string notation. */ |
3870 | |
3871 | static void |
3872 | print_packet (char *buf) |
3873 | { |
3874 | puts_filtered ("\""); |
3875 | fputstr_filtered (buf, '"', gdb_stdout); |
3876 | puts_filtered ("\""); |
3877 | } |
3878 | |
3879 | int |
3880 | putpkt (char *buf) |
3881 | { |
3882 | return putpkt_binary (buf, strlen (buf)); |
3883 | } |
3884 | |
3885 | /* Send a packet to the remote machine, with error checking. The data |
3886 | of the packet is in BUF. The string in BUF can be at most (rs->remote_packet_size) - 5 |
3887 | to account for the $, # and checksum, and for a possible /0 if we are |
3888 | debugging (remote_debug) and want to print the sent packet as a string */ |
3889 | |
3890 | static int |
3891 | putpkt_binary (char *buf, int cnt) |
3892 | { |
3893 | struct remote_state *rs = get_remote_state (); |
3894 | int i; |
3895 | unsigned char csum = 0; |
3896 | char *buf2 = alloca (cnt + 6)__builtin_alloca(cnt + 6); |
3897 | long sizeof_junkbuf = (rs->remote_packet_size); |
3898 | char *junkbuf = alloca (sizeof_junkbuf)__builtin_alloca(sizeof_junkbuf); |
3899 | |
3900 | int ch; |
3901 | int tcount = 0; |
3902 | char *p; |
3903 | |
3904 | /* Copy the packet into buffer BUF2, encapsulating it |
3905 | and giving it a checksum. */ |
3906 | |
3907 | p = buf2; |
3908 | *p++ = '$'; |
3909 | |
3910 | for (i = 0; i < cnt; i++) |
3911 | { |
3912 | csum += buf[i]; |
3913 | *p++ = buf[i]; |
3914 | } |
3915 | *p++ = '#'; |
3916 | *p++ = tohex ((csum >> 4) & 0xf); |
3917 | *p++ = tohex (csum & 0xf); |
3918 | |
3919 | /* Send it over and over until we get a positive ack. */ |
3920 | |
3921 | while (1) |
3922 | { |
3923 | int started_error_output = 0; |
3924 | |
3925 | if (remote_debug) |
3926 | { |
3927 | *p = '\0'; |
3928 | fprintf_unfiltered (gdb_stdlog, "Sending packet: "); |
3929 | fputstrn_unfiltered (buf2, p - buf2, 0, gdb_stdlog); |
3930 | fprintf_unfiltered (gdb_stdlog, "..."); |
3931 | gdb_flush (gdb_stdlog); |
3932 | } |
3933 | if (serial_write (remote_desc, buf2, p - buf2)) |
3934 | perror_with_name ("putpkt: write failed"); |
3935 | |
3936 | /* read until either a timeout occurs (-2) or '+' is read */ |
3937 | while (1) |
3938 | { |
3939 | ch = readchar (remote_timeout); |
3940 | |
3941 | if (remote_debug) |
3942 | { |
3943 | switch (ch) |
3944 | { |
3945 | case '+': |
3946 | case '-': |
3947 | case SERIAL_TIMEOUT: |
3948 | case '$': |
3949 | if (started_error_output) |
3950 | { |
3951 | putchar_unfiltered ('\n'); |
3952 | started_error_output = 0; |
3953 | } |
3954 | } |
3955 | } |
3956 | |
3957 | switch (ch) |
3958 | { |
3959 | case '+': |
3960 | if (remote_debug) |
3961 | fprintf_unfiltered (gdb_stdlog, "Ack\n"); |
3962 | return 1; |
3963 | case '-': |
3964 | if (remote_debug) |
3965 | fprintf_unfiltered (gdb_stdlog, "Nak\n"); |
3966 | case SERIAL_TIMEOUT: |
3967 | tcount++; |
3968 | if (tcount > 3) |
3969 | return 0; |
3970 | break; /* Retransmit buffer */ |
3971 | case '$': |
3972 | { |
3973 | if (remote_debug) |
3974 | fprintf_unfiltered (gdb_stdlog, "Packet instead of Ack, ignoring it\n"); |
3975 | /* It's probably an old response, and we're out of sync. |
3976 | Just gobble up the packet and ignore it. */ |
3977 | read_frame (junkbuf, sizeof_junkbuf); |
3978 | continue; /* Now, go look for + */ |
3979 | } |
3980 | default: |
3981 | if (remote_debug) |
3982 | { |
3983 | if (!started_error_output) |
3984 | { |
3985 | started_error_output = 1; |
3986 | fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: "); |
3987 | } |
3988 | fputc_unfiltered (ch & 0177, gdb_stdlog); |
3989 | } |
3990 | continue; |
3991 | } |
3992 | break; /* Here to retransmit */ |
3993 | } |
3994 | |
3995 | #if 0 |
3996 | /* This is wrong. If doing a long backtrace, the user should be |
3997 | able to get out next time we call QUIT, without anything as |
3998 | violent as interrupt_query. If we want to provide a way out of |
3999 | here without getting to the next QUIT, it should be based on |
4000 | hitting ^C twice as in remote_wait. */ |
4001 | if (quit_flag) |
4002 | { |
4003 | quit_flag = 0; |
4004 | interrupt_query (); |
4005 | } |
4006 | #endif |
4007 | } |
4008 | } |
4009 | |
4010 | /* Come here after finding the start of the frame. Collect the rest |
4011 | into BUF, verifying the checksum, length, and handling run-length |
4012 | compression. No more than sizeof_buf-1 characters are read so that |
4013 | the buffer can be NUL terminated. |
4014 | |
4015 | Returns -1 on error, number of characters in buffer (ignoring the |
4016 | trailing NULL) on success. (could be extended to return one of the |
4017 | SERIAL status indications). */ |
4018 | |
4019 | static long |
4020 | read_frame (char *buf, |
4021 | long sizeof_buf) |
4022 | { |
4023 | unsigned char csum; |
4024 | long bc; |
4025 | int c; |
4026 | |
4027 | csum = 0; |
4028 | bc = 0; |
4029 | |
4030 | while (1) |
4031 | { |
4032 | /* ASSERT (bc < sizeof_buf - 1) - space for trailing NUL */ |
4033 | c = readchar (remote_timeout); |
4034 | switch (c) |
4035 | { |
4036 | case SERIAL_TIMEOUT: |
4037 | if (remote_debug) |
4038 | fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog); |
4039 | return -1; |
4040 | case '$': |
4041 | if (remote_debug) |
4042 | fputs_filtered ("Saw new packet start in middle of old one\n", |
4043 | gdb_stdlog); |
4044 | return -1; /* Start a new packet, count retries */ |
4045 | case '#': |
4046 | { |
4047 | unsigned char pktcsum; |
4048 | int check_0 = 0; |
4049 | int check_1 = 0; |
4050 | |
4051 | buf[bc] = '\0'; |
4052 | |
4053 | check_0 = readchar (remote_timeout); |
4054 | if (check_0 >= 0) |
4055 | check_1 = readchar (remote_timeout); |
4056 | |
4057 | if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT) |
4058 | { |
4059 | if (remote_debug) |
4060 | fputs_filtered ("Timeout in checksum, retrying\n", gdb_stdlog); |
4061 | return -1; |
4062 | } |
4063 | else if (check_0 < 0 || check_1 < 0) |
4064 | { |
4065 | if (remote_debug) |
4066 | fputs_filtered ("Communication error in checksum\n", gdb_stdlog); |
4067 | return -1; |
4068 | } |
4069 | |
4070 | pktcsum = (fromhex (check_0) << 4) | fromhex (check_1); |
4071 | if (csum == pktcsum) |
4072 | return bc; |
4073 | |
4074 | if (remote_debug) |
4075 | { |
4076 | fprintf_filtered (gdb_stdlog, |
4077 | "Bad checksum, sentsum=0x%x, csum=0x%x, buf=", |
4078 | pktcsum, csum); |
4079 | fputs_filtered (buf, gdb_stdlog); |
4080 | fputs_filtered ("\n", gdb_stdlog); |
4081 | } |
4082 | /* Number of characters in buffer ignoring trailing |
4083 | NUL. */ |
4084 | return -1; |
4085 | } |
4086 | case '*': /* Run length encoding */ |
4087 | { |
4088 | int repeat; |
4089 | csum += c; |
4090 | |
4091 | c = readchar (remote_timeout); |
4092 | csum += c; |
4093 | repeat = c - ' ' + 3; /* Compute repeat count */ |
4094 | |
4095 | /* The character before ``*'' is repeated. */ |
4096 | |
4097 | if (repeat > 0 && repeat <= 255 |
4098 | && bc > 0 |
4099 | && bc + repeat - 1 < sizeof_buf - 1) |
4100 | { |
4101 | memset (&buf[bc], buf[bc - 1], repeat); |
4102 | bc += repeat; |
4103 | continue; |
4104 | } |
4105 | |
4106 | buf[bc] = '\0'; |
4107 | printf_filtered ("Repeat count %d too large for buffer: ", repeat); |
4108 | puts_filtered (buf); |
4109 | puts_filtered ("\n"); |
4110 | return -1; |
4111 | } |
4112 | default: |
4113 | if (bc < sizeof_buf - 1) |
4114 | { |
4115 | buf[bc++] = c; |
4116 | csum += c; |
4117 | continue; |
4118 | } |
4119 | |
4120 | buf[bc] = '\0'; |
4121 | puts_filtered ("Remote packet too long: "); |
4122 | puts_filtered (buf); |
4123 | puts_filtered ("\n"); |
4124 | |
4125 | return -1; |
4126 | } |
4127 | } |
4128 | } |
4129 | |
4130 | /* Read a packet from the remote machine, with error checking, and |
4131 | store it in BUF. If FOREVER, wait forever rather than timing out; |
4132 | this is used (in synchronous mode) to wait for a target that is is |
4133 | executing user code to stop. */ |
4134 | /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we |
4135 | don't have to change all the calls to getpkt to deal with the |
4136 | return value, because at the moment I don't know what the right |
4137 | thing to do it for those. */ |
4138 | void |
4139 | getpkt (char *buf, |
4140 | long sizeof_buf, |
4141 | int forever) |
4142 | { |
4143 | int timed_out; |
4144 | |
4145 | timed_out = getpkt_sane (buf, sizeof_buf, forever); |
Value stored to 'timed_out' is never read | |
4146 | } |
4147 | |
4148 | |
4149 | /* Read a packet from the remote machine, with error checking, and |
4150 | store it in BUF. If FOREVER, wait forever rather than timing out; |
4151 | this is used (in synchronous mode) to wait for a target that is is |
4152 | executing user code to stop. If FOREVER == 0, this function is |
4153 | allowed to time out gracefully and return an indication of this to |
4154 | the caller. */ |
4155 | static int |
4156 | getpkt_sane (char *buf, |
4157 | long sizeof_buf, |
4158 | int forever) |
4159 | { |
4160 | int c; |
4161 | int tries; |
4162 | int timeout; |
4163 | int val; |
4164 | |
4165 | strcpy (buf, "timeout"); |
4166 | |
4167 | if (forever) |
4168 | { |
4169 | timeout = watchdog > 0 ? watchdog : -1; |
4170 | } |
4171 | |
4172 | else |
4173 | timeout = remote_timeout; |
4174 | |
4175 | #define MAX_TRIES3 3 |
4176 | |
4177 | for (tries = 1; tries <= MAX_TRIES3; tries++) |
4178 | { |
4179 | /* This can loop forever if the remote side sends us characters |
4180 | continuously, but if it pauses, we'll get a zero from readchar |
4181 | because of timeout. Then we'll count that as a retry. */ |
4182 | |
4183 | /* Note that we will only wait forever prior to the start of a packet. |
4184 | After that, we expect characters to arrive at a brisk pace. They |
4185 | should show up within remote_timeout intervals. */ |
4186 | |
4187 | do |
4188 | { |
4189 | c = readchar (timeout); |
4190 | |
4191 | if (c == SERIAL_TIMEOUT) |
4192 | { |
4193 | if (forever) /* Watchdog went off? Kill the target. */ |
4194 | { |
4195 | QUIT{ if (quit_flag) quit (); if (deprecated_interactive_hook) deprecated_interactive_hook (); }; |
4196 | target_mourn_inferior ()(*current_target.to_mourn_inferior) (); |
4197 | error ("Watchdog has expired. Target detached.\n"); |
4198 | } |
4199 | if (remote_debug) |
4200 | fputs_filtered ("Timed out.\n", gdb_stdlog); |
4201 | goto retry; |
4202 | } |
4203 | } |
4204 | while (c != '$'); |
4205 | |
4206 | /* We've found the start of a packet, now collect the data. */ |
4207 | |
4208 | val = read_frame (buf, sizeof_buf); |
4209 | |
4210 | if (val >= 0) |
4211 | { |
4212 | if (remote_debug) |
4213 | { |
4214 | fprintf_unfiltered (gdb_stdlog, "Packet received: "); |
4215 | fputstr_unfiltered (buf, 0, gdb_stdlog); |
4216 | fprintf_unfiltered (gdb_stdlog, "\n"); |
4217 | } |
4218 | serial_write (remote_desc, "+", 1); |
4219 | return 0; |
4220 | } |
4221 | |
4222 | /* Try the whole thing again. */ |
4223 | retry: |
4224 | serial_write (remote_desc, "-", 1); |
4225 | } |
4226 | |
4227 | /* We have tried hard enough, and just can't receive the packet. Give up. */ |
4228 | |
4229 | printf_unfiltered ("Ignoring packet error, continuing...\n"); |
4230 | serial_write (remote_desc, "+", 1); |
4231 | return 1; |
4232 | } |
4233 | |
4234 | static void |
4235 | remote_kill (void) |
4236 | { |
4237 | /* For some mysterious reason, wait_for_inferior calls kill instead of |
4238 | mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */ |
4239 | if (kill_kludge) |
4240 | { |
4241 | kill_kludge = 0; |
4242 | target_mourn_inferior ()(*current_target.to_mourn_inferior) (); |
4243 | return; |
4244 | } |
4245 | |
4246 | /* Use catch_errors so the user can quit from gdb even when we aren't on |
4247 | speaking terms with the remote system. */ |
4248 | catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR(1 << (int)(-RETURN_ERROR))); |
4249 | |
4250 | /* Don't wait for it to die. I'm not really sure it matters whether |
4251 | we do or not. For the existing stubs, kill is a noop. */ |
4252 | target_mourn_inferior ()(*current_target.to_mourn_inferior) (); |
4253 | } |
4254 | |
4255 | /* Async version of remote_kill. */ |
4256 | static void |
4257 | remote_async_kill (void) |
4258 | { |
4259 | /* Unregister the file descriptor from the event loop. */ |
4260 | if (target_is_async_p ()(current_target.to_is_async_p())) |
4261 | serial_async (remote_desc, NULL((void*)0), 0); |
4262 | |
4263 | /* For some mysterious reason, wait_for_inferior calls kill instead of |
4264 | mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */ |
4265 | if (kill_kludge) |
4266 | { |
4267 | kill_kludge = 0; |
4268 | target_mourn_inferior ()(*current_target.to_mourn_inferior) (); |
4269 | return; |
4270 | } |
4271 | |
4272 | /* Use catch_errors so the user can quit from gdb even when we aren't on |
4273 | speaking terms with the remote system. */ |
4274 | catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR(1 << (int)(-RETURN_ERROR))); |
4275 | |
4276 | /* Don't wait for it to die. I'm not really sure it matters whether |
4277 | we do or not. For the existing stubs, kill is a noop. */ |
4278 | target_mourn_inferior ()(*current_target.to_mourn_inferior) (); |
4279 | } |
4280 | |
4281 | static void |
4282 | remote_mourn (void) |
4283 | { |
4284 | remote_mourn_1 (&remote_ops); |
4285 | } |
4286 | |
4287 | static void |
4288 | remote_async_mourn (void) |
4289 | { |
4290 | remote_mourn_1 (&remote_async_ops); |
4291 | } |
4292 | |
4293 | static void |
4294 | extended_remote_mourn (void) |
4295 | { |
4296 | /* We do _not_ want to mourn the target like this; this will |
4297 | remove the extended remote target from the target stack, |
4298 | and the next time the user says "run" it'll fail. |
4299 | |
4300 | FIXME: What is the right thing to do here? */ |
4301 | #if 0 |
4302 | remote_mourn_1 (&extended_remote_ops); |
4303 | #endif |
4304 | } |
4305 | |
4306 | /* Worker function for remote_mourn. */ |
4307 | static void |
4308 | remote_mourn_1 (struct target_ops *target) |
4309 | { |
4310 | unpush_target (target); |
4311 | generic_mourn_inferior (); |
4312 | } |
4313 | |
4314 | /* In the extended protocol we want to be able to do things like |
4315 | "run" and have them basically work as expected. So we need |
4316 | a special create_inferior function. |
4317 | |
4318 | FIXME: One day add support for changing the exec file |
4319 | we're debugging, arguments and an environment. */ |
4320 | |
4321 | static void |
4322 | extended_remote_create_inferior (char *exec_file, char *args, char **env, |
4323 | int from_tty) |
4324 | { |
4325 | /* Rip out the breakpoints; we'll reinsert them after restarting |
4326 | the remote server. */ |
4327 | remove_breakpoints (); |
4328 | |
4329 | /* Now restart the remote server. */ |
4330 | extended_remote_restart (); |
4331 | |
4332 | /* Now put the breakpoints back in. This way we're safe if the |
4333 | restart function works via a unix fork on the remote side. */ |
4334 | insert_breakpoints (); |
4335 | |
4336 | /* Clean up from the last time we were running. */ |
4337 | clear_proceed_status (); |
4338 | |
4339 | /* Let the remote process run. */ |
4340 | proceed (-1, TARGET_SIGNAL_0, 0); |
4341 | } |
4342 | |
4343 | /* Async version of extended_remote_create_inferior. */ |
4344 | static void |
4345 | extended_remote_async_create_inferior (char *exec_file, char *args, char **env, |
4346 | int from_tty) |
4347 | { |
4348 | /* Rip out the breakpoints; we'll reinsert them after restarting |
4349 | the remote server. */ |
4350 | remove_breakpoints (); |
4351 | |
4352 | /* If running asynchronously, register the target file descriptor |
4353 | with the event loop. */ |
4354 | if (target_can_async_p ()(current_target.to_can_async_p ())) |
4355 | target_async (inferior_event_handler, 0)(current_target.to_async((inferior_event_handler), (0))); |
4356 | |
4357 | /* Now restart the remote server. */ |
4358 | extended_remote_restart (); |
4359 | |
4360 | /* Now put the breakpoints back in. This way we're safe if the |
4361 | restart function works via a unix fork on the remote side. */ |
4362 | insert_breakpoints (); |
4363 | |
4364 | /* Clean up from the last time we were running. */ |
4365 | clear_proceed_status (); |
4366 | |
4367 | /* Let the remote process run. */ |
4368 | proceed (-1, TARGET_SIGNAL_0, 0); |
4369 | } |
4370 | |
4371 | |
4372 | /* On some machines, e.g. 68k, we may use a different breakpoint |
4373 | instruction than other targets; in those use |
4374 | DEPRECATED_REMOTE_BREAKPOINT instead of just BREAKPOINT_FROM_PC. |
4375 | Also, bi-endian targets may define |
4376 | DEPRECATED_LITTLE_REMOTE_BREAKPOINT and |
4377 | DEPRECATED_BIG_REMOTE_BREAKPOINT. If none of these are defined, we |
4378 | just call the standard routines that are in mem-break.c. */ |
4379 | |
4380 | /* NOTE: cagney/2003-06-08: This is silly. A remote and simulator |
4381 | target should use an identical BREAKPOINT_FROM_PC. As for native, |
4382 | the ARCH-OS-tdep.c code can override the default. */ |
4383 | |
4384 | #if defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && defined (DEPRECATED_BIG_REMOTE_BREAKPOINT) && !defined(DEPRECATED_REMOTE_BREAKPOINT) |
4385 | #define DEPRECATED_REMOTE_BREAKPOINT |
4386 | #endif |
4387 | |
4388 | #ifdef DEPRECATED_REMOTE_BREAKPOINT |
4389 | |
4390 | /* If the target isn't bi-endian, just pretend it is. */ |
4391 | #if !defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && !defined (DEPRECATED_BIG_REMOTE_BREAKPOINT) |
4392 | #define DEPRECATED_LITTLE_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT |
4393 | #define DEPRECATED_BIG_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT |
4394 | #endif |
4395 | |
4396 | static unsigned char big_break_insn[] = DEPRECATED_BIG_REMOTE_BREAKPOINT; |
4397 | static unsigned char little_break_insn[] = DEPRECATED_LITTLE_REMOTE_BREAKPOINT; |
4398 | |
4399 | #endif /* DEPRECATED_REMOTE_BREAKPOINT */ |
4400 | |
4401 | /* Insert a breakpoint on targets that don't have any better |
4402 | breakpoint support. We read the contents of the target location |
4403 | and stash it, then overwrite it with a breakpoint instruction. |
4404 | ADDR is the target location in the target machine. CONTENTS_CACHE |
4405 | is a pointer to memory allocated for saving the target contents. |
4406 | It is guaranteed by the caller to be long enough to save the number |
4407 | of bytes returned by BREAKPOINT_FROM_PC. */ |
4408 | |
4409 | static int |
4410 | remote_insert_breakpoint (CORE_ADDR addr, char *contents_cache) |
4411 | { |
4412 | struct remote_state *rs = get_remote_state (); |
4413 | #ifdef DEPRECATED_REMOTE_BREAKPOINT |
4414 | int val; |
4415 | #endif |
4416 | int bp_size; |
4417 | |
4418 | /* Try the "Z" s/w breakpoint packet if it is not already disabled. |
4419 | If it succeeds, then set the support to PACKET_ENABLE. If it |
4420 | fails, and the user has explicitly requested the Z support then |
4421 | report an error, otherwise, mark it disabled and go on. */ |
4422 | |
4423 | if (remote_protocol_Z[Z_PACKET_SOFTWARE_BP].support != PACKET_DISABLE) |
4424 | { |
4425 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
4426 | char *p = buf; |
4427 | |
4428 | addr = remote_address_masked (addr); |
4429 | *(p++) = 'Z'; |
4430 | *(p++) = '0'; |
4431 | *(p++) = ','; |
4432 | p += hexnumstr (p, (ULONGESTunsigned long) addr); |
4433 | BREAKPOINT_FROM_PC (&addr, &bp_size)(gdbarch_breakpoint_from_pc (current_gdbarch, &addr, & bp_size)); |
4434 | sprintf (p, ",%d", bp_size); |
4435 | |
4436 | putpkt (buf); |
4437 | getpkt (buf, (rs->remote_packet_size), 0); |
4438 | |
4439 | switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_SOFTWARE_BP])) |
4440 | { |
4441 | case PACKET_ERROR: |
4442 | return -1; |
4443 | case PACKET_OK: |
4444 | return 0; |
4445 | case PACKET_UNKNOWN: |
4446 | break; |
4447 | } |
4448 | } |
4449 | |
4450 | #ifdef DEPRECATED_REMOTE_BREAKPOINT |
4451 | val = target_read_memory (addr, contents_cache, sizeof big_break_insn); |
4452 | |
4453 | if (val == 0) |
4454 | { |
4455 | if (TARGET_BYTE_ORDER(gdbarch_byte_order (current_gdbarch)) == BFD_ENDIAN_BIG) |
4456 | val = target_write_memory (addr, (char *) big_break_insn, |
4457 | sizeof big_break_insn); |
4458 | else |
4459 | val = target_write_memory (addr, (char *) little_break_insn, |
4460 | sizeof little_break_insn); |
4461 | } |
4462 | |
4463 | return val; |
4464 | #else |
4465 | return memory_insert_breakpoint (addr, contents_cache); |
4466 | #endif /* DEPRECATED_REMOTE_BREAKPOINT */ |
4467 | } |
4468 | |
4469 | static int |
4470 | remote_remove_breakpoint (CORE_ADDR addr, char *contents_cache) |
4471 | { |
4472 | struct remote_state *rs = get_remote_state (); |
4473 | int bp_size; |
4474 | |
4475 | if (remote_protocol_Z[Z_PACKET_SOFTWARE_BP].support != PACKET_DISABLE) |
4476 | { |
4477 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
4478 | char *p = buf; |
4479 | |
4480 | *(p++) = 'z'; |
4481 | *(p++) = '0'; |
4482 | *(p++) = ','; |
4483 | |
4484 | addr = remote_address_masked (addr); |
4485 | p += hexnumstr (p, (ULONGESTunsigned long) addr); |
4486 | BREAKPOINT_FROM_PC (&addr, &bp_size)(gdbarch_breakpoint_from_pc (current_gdbarch, &addr, & bp_size)); |
4487 | sprintf (p, ",%d", bp_size); |
4488 | |
4489 | putpkt (buf); |
4490 | getpkt (buf, (rs->remote_packet_size), 0); |
4491 | |
4492 | return (buf[0] == 'E'); |
4493 | } |
4494 | |
4495 | #ifdef DEPRECATED_REMOTE_BREAKPOINT |
4496 | return target_write_memory (addr, contents_cache, sizeof big_break_insn); |
4497 | #else |
4498 | return memory_remove_breakpoint (addr, contents_cache); |
4499 | #endif /* DEPRECATED_REMOTE_BREAKPOINT */ |
4500 | } |
4501 | |
4502 | static int |
4503 | watchpoint_to_Z_packet (int type) |
4504 | { |
4505 | switch (type) |
4506 | { |
4507 | case hw_write: |
4508 | return 2; |
4509 | break; |
4510 | case hw_read: |
4511 | return 3; |
4512 | break; |
4513 | case hw_access: |
4514 | return 4; |
4515 | break; |
4516 | default: |
4517 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/remote.c", __LINE__4517, |
4518 | "hw_bp_to_z: bad watchpoint type %d", type); |
4519 | } |
4520 | } |
4521 | |
4522 | static int |
4523 | remote_insert_watchpoint (CORE_ADDR addr, int len, int type) |
4524 | { |
4525 | struct remote_state *rs = get_remote_state (); |
4526 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
4527 | char *p; |
4528 | enum Z_packet_type packet = watchpoint_to_Z_packet (type); |
4529 | |
4530 | if (remote_protocol_Z[packet].support == PACKET_DISABLE) |
4531 | error ("Can't set hardware watchpoints without the '%s' (%s) packet\n", |
4532 | remote_protocol_Z[packet].name, |
4533 | remote_protocol_Z[packet].title); |
4534 | |
4535 | sprintf (buf, "Z%x,", packet); |
4536 | p = strchr (buf, '\0'); |
4537 | addr = remote_address_masked (addr); |
4538 | p += hexnumstr (p, (ULONGESTunsigned long) addr); |
4539 | sprintf (p, ",%x", len); |
4540 | |
4541 | putpkt (buf); |
4542 | getpkt (buf, (rs->remote_packet_size), 0); |
4543 | |
4544 | switch (packet_ok (buf, &remote_protocol_Z[packet])) |
4545 | { |
4546 | case PACKET_ERROR: |
4547 | case PACKET_UNKNOWN: |
4548 | return -1; |
4549 | case PACKET_OK: |
4550 | return 0; |
4551 | } |
4552 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/remote.c", __LINE__4552, |
4553 | "remote_insert_watchpoint: reached end of function"); |
4554 | } |
4555 | |
4556 | |
4557 | static int |
4558 | remote_remove_watchpoint (CORE_ADDR addr, int len, int type) |
4559 | { |
4560 | struct remote_state *rs = get_remote_state (); |
4561 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
4562 | char *p; |
4563 | enum Z_packet_type packet = watchpoint_to_Z_packet (type); |
4564 | |
4565 | if (remote_protocol_Z[packet].support == PACKET_DISABLE) |
4566 | error ("Can't clear hardware watchpoints without the '%s' (%s) packet\n", |
4567 | remote_protocol_Z[packet].name, |
4568 | remote_protocol_Z[packet].title); |
4569 | |
4570 | sprintf (buf, "z%x,", packet); |
4571 | p = strchr (buf, '\0'); |
4572 | addr = remote_address_masked (addr); |
4573 | p += hexnumstr (p, (ULONGESTunsigned long) addr); |
4574 | sprintf (p, ",%x", len); |
4575 | putpkt (buf); |
4576 | getpkt (buf, (rs->remote_packet_size), 0); |
4577 | |
4578 | switch (packet_ok (buf, &remote_protocol_Z[packet])) |
4579 | { |
4580 | case PACKET_ERROR: |
4581 | case PACKET_UNKNOWN: |
4582 | return -1; |
4583 | case PACKET_OK: |
4584 | return 0; |
4585 | } |
4586 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/remote.c", __LINE__4586, |
4587 | "remote_remove_watchpoint: reached end of function"); |
4588 | } |
4589 | |
4590 | |
4591 | int remote_hw_watchpoint_limit = -1; |
4592 | int remote_hw_breakpoint_limit = -1; |
4593 | |
4594 | static int |
4595 | remote_check_watch_resources (int type, int cnt, int ot) |
4596 | { |
4597 | if (type == bp_hardware_breakpoint) |
4598 | { |
4599 | if (remote_hw_breakpoint_limit == 0) |
4600 | return 0; |
4601 | else if (remote_hw_breakpoint_limit < 0) |
4602 | return 1; |
4603 | else if (cnt <= remote_hw_breakpoint_limit) |
4604 | return 1; |
4605 | } |
4606 | else |
4607 | { |
4608 | if (remote_hw_watchpoint_limit == 0) |
4609 | return 0; |
4610 | else if (remote_hw_watchpoint_limit < 0) |
4611 | return 1; |
4612 | else if (ot) |
4613 | return -1; |
4614 | else if (cnt <= remote_hw_watchpoint_limit) |
4615 | return 1; |
4616 | } |
4617 | return -1; |
4618 | } |
4619 | |
4620 | static int |
4621 | remote_stopped_by_watchpoint (void) |
4622 | { |
4623 | return remote_stopped_by_watchpoint_p; |
4624 | } |
4625 | |
4626 | extern int stepped_after_stopped_by_watchpoint; |
4627 | |
4628 | static int |
4629 | remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p) |
4630 | { |
4631 | int rc = 0; |
4632 | if (remote_stopped_by_watchpoint () |
4633 | || stepped_after_stopped_by_watchpoint) |
4634 | { |
4635 | *addr_p = remote_watch_data_address; |
4636 | rc = 1; |
4637 | } |
4638 | |
4639 | return rc; |
4640 | } |
4641 | |
4642 | |
4643 | static int |
4644 | remote_insert_hw_breakpoint (CORE_ADDR addr, char *shadow) |
4645 | { |
4646 | int len = 0; |
4647 | struct remote_state *rs = get_remote_state (); |
4648 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
4649 | char *p = buf; |
4650 | |
4651 | /* The length field should be set to the size of a breakpoint |
4652 | instruction. */ |
4653 | |
4654 | BREAKPOINT_FROM_PC (&addr, &len)(gdbarch_breakpoint_from_pc (current_gdbarch, &addr, & len)); |
4655 | |
4656 | if (remote_protocol_Z[Z_PACKET_HARDWARE_BP].support == PACKET_DISABLE) |
4657 | error ("Can't set hardware breakpoint without the '%s' (%s) packet\n", |
4658 | remote_protocol_Z[Z_PACKET_HARDWARE_BP].name, |
4659 | remote_protocol_Z[Z_PACKET_HARDWARE_BP].title); |
4660 | |
4661 | *(p++) = 'Z'; |
4662 | *(p++) = '1'; |
4663 | *(p++) = ','; |
4664 | |
4665 | addr = remote_address_masked (addr); |
4666 | p += hexnumstr (p, (ULONGESTunsigned long) addr); |
4667 | sprintf (p, ",%x", len); |
4668 | |
4669 | putpkt (buf); |
4670 | getpkt (buf, (rs->remote_packet_size), 0); |
4671 | |
4672 | switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_HARDWARE_BP])) |
4673 | { |
4674 | case PACKET_ERROR: |
4675 | case PACKET_UNKNOWN: |
4676 | return -1; |
4677 | case PACKET_OK: |
4678 | return 0; |
4679 | } |
4680 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/remote.c", __LINE__4680, |
4681 | "remote_insert_hw_breakpoint: reached end of function"); |
4682 | } |
4683 | |
4684 | |
4685 | static int |
4686 | remote_remove_hw_breakpoint (CORE_ADDR addr, char *shadow) |
4687 | { |
4688 | int len; |
4689 | struct remote_state *rs = get_remote_state (); |
4690 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
4691 | char *p = buf; |
4692 | |
4693 | /* The length field should be set to the size of a breakpoint |
4694 | instruction. */ |
4695 | |
4696 | BREAKPOINT_FROM_PC (&addr, &len)(gdbarch_breakpoint_from_pc (current_gdbarch, &addr, & len)); |
4697 | |
4698 | if (remote_protocol_Z[Z_PACKET_HARDWARE_BP].support == PACKET_DISABLE) |
4699 | error ("Can't clear hardware breakpoint without the '%s' (%s) packet\n", |
4700 | remote_protocol_Z[Z_PACKET_HARDWARE_BP].name, |
4701 | remote_protocol_Z[Z_PACKET_HARDWARE_BP].title); |
4702 | |
4703 | *(p++) = 'z'; |
4704 | *(p++) = '1'; |
4705 | *(p++) = ','; |
4706 | |
4707 | addr = remote_address_masked (addr); |
4708 | p += hexnumstr (p, (ULONGESTunsigned long) addr); |
4709 | sprintf (p, ",%x", len); |
4710 | |
4711 | putpkt(buf); |
4712 | getpkt (buf, (rs->remote_packet_size), 0); |
4713 | |
4714 | switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_HARDWARE_BP])) |
4715 | { |
4716 | case PACKET_ERROR: |
4717 | case PACKET_UNKNOWN: |
4718 | return -1; |
4719 | case PACKET_OK: |
4720 | return 0; |
4721 | } |
4722 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/remote.c", __LINE__4722, |
4723 | "remote_remove_hw_breakpoint: reached end of function"); |
4724 | } |
4725 | |
4726 | /* Some targets are only capable of doing downloads, and afterwards |
4727 | they switch to the remote serial protocol. This function provides |
4728 | a clean way to get from the download target to the remote target. |
4729 | It's basically just a wrapper so that we don't have to expose any |
4730 | of the internal workings of remote.c. |
4731 | |
4732 | Prior to calling this routine, you should shutdown the current |
4733 | target code, else you will get the "A program is being debugged |
4734 | already..." message. Usually a call to pop_target() suffices. */ |
4735 | |
4736 | void |
4737 | push_remote_target (char *name, int from_tty) |
4738 | { |
4739 | printf_filtered ("Switching to remote protocol\n"); |
4740 | remote_open (name, from_tty); |
4741 | } |
4742 | |
4743 | /* Table used by the crc32 function to calcuate the checksum. */ |
4744 | |
4745 | static unsigned long crc32_table[256] = |
4746 | {0, 0}; |
4747 | |
4748 | static unsigned long |
4749 | crc32 (unsigned char *buf, int len, unsigned int crc) |
4750 | { |
4751 | if (!crc32_table[1]) |
4752 | { |
4753 | /* Initialize the CRC table and the decoding table. */ |
4754 | int i, j; |
4755 | unsigned int c; |
4756 | |
4757 | for (i = 0; i < 256; i++) |
4758 | { |
4759 | for (c = i << 24, j = 8; j > 0; --j) |
4760 | c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1); |
4761 | crc32_table[i] = c; |
4762 | } |
4763 | } |
4764 | |
4765 | while (len--) |
4766 | { |
4767 | crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255]; |
4768 | buf++; |
4769 | } |
4770 | return crc; |
4771 | } |
4772 | |
4773 | /* compare-sections command |
4774 | |
4775 | With no arguments, compares each loadable section in the exec bfd |
4776 | with the same memory range on the target, and reports mismatches. |
4777 | Useful for verifying the image on the target against the exec file. |
4778 | Depends on the target understanding the new "qCRC:" request. */ |
4779 | |
4780 | /* FIXME: cagney/1999-10-26: This command should be broken down into a |
4781 | target method (target verify memory) and generic version of the |
4782 | actual command. This will allow other high-level code (especially |
4783 | generic_load()) to make use of this target functionality. */ |
4784 | |
4785 | static void |
4786 | compare_sections_command (char *args, int from_tty) |
4787 | { |
4788 | struct remote_state *rs = get_remote_state (); |
4789 | asection *s; |
4790 | unsigned long host_crc, target_crc; |
4791 | extern bfd *exec_bfd; |
4792 | struct cleanup *old_chain; |
4793 | char *tmp; |
4794 | char *sectdata; |
4795 | const char *sectname; |
4796 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
4797 | bfd_size_type size; |
4798 | bfd_vma lma; |
4799 | int matched = 0; |
4800 | int mismatched = 0; |
4801 | |
4802 | if (!exec_bfd) |
4803 | error ("command cannot be used without an exec file"); |
4804 | if (!current_target.to_shortname || |
4805 | strcmp (current_target.to_shortname, "remote") != 0) |
4806 | error ("command can only be used with remote target"); |
4807 | |
4808 | for (s = exec_bfd->sections; s; s = s->next) |
4809 | { |
4810 | if (!(s->flags & SEC_LOAD0x002)) |
4811 | continue; /* skip non-loadable section */ |
4812 | |
4813 | size = bfd_get_section_size (s)((s)->_raw_size); |
4814 | if (size == 0) |
4815 | continue; /* skip zero-length section */ |
4816 | |
4817 | sectname = bfd_get_section_name (exec_bfd, s)((s)->name + 0); |
4818 | if (args && strcmp (args, sectname) != 0) |
4819 | continue; /* not the section selected by user */ |
4820 | |
4821 | matched = 1; /* do this section */ |
4822 | lma = s->lma; |
4823 | /* FIXME: assumes lma can fit into long */ |
4824 | sprintf (buf, "qCRC:%lx,%lx", (long) lma, (long) size); |
4825 | putpkt (buf); |
4826 | |
4827 | /* be clever; compute the host_crc before waiting for target reply */ |
4828 | sectdata = xmalloc (size); |
4829 | old_chain = make_cleanup (xfree, sectdata); |
4830 | bfd_get_section_contents (exec_bfd, s, sectdata, 0, size); |
4831 | host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff); |
4832 | |
4833 | getpkt (buf, (rs->remote_packet_size), 0); |
4834 | if (buf[0] == 'E') |
4835 | error ("target memory fault, section %s, range 0x%s -- 0x%s", |
4836 | sectname, paddr (lma), paddr (lma + size)); |
4837 | if (buf[0] != 'C') |
4838 | error ("remote target does not support this operation"); |
4839 | |
4840 | for (target_crc = 0, tmp = &buf[1]; *tmp; tmp++) |
4841 | target_crc = target_crc * 16 + fromhex (*tmp); |
4842 | |
4843 | printf_filtered ("Section %s, range 0x%s -- 0x%s: ", |
4844 | sectname, paddr (lma), paddr (lma + size)); |
4845 | if (host_crc == target_crc) |
4846 | printf_filtered ("matched.\n"); |
4847 | else |
4848 | { |
4849 | printf_filtered ("MIS-MATCHED!\n"); |
4850 | mismatched++; |
4851 | } |
4852 | |
4853 | do_cleanups (old_chain); |
4854 | } |
4855 | if (mismatched > 0) |
4856 | warning ("One or more sections of the remote executable does not match\n\ |
4857 | the loaded file\n"); |
4858 | if (args && !matched) |
4859 | printf_filtered ("No loaded section named '%s'.\n", args); |
4860 | } |
4861 | |
4862 | static LONGESTlong |
4863 | remote_xfer_partial (struct target_ops *ops, enum target_object object, |
4864 | const char *annex, void *readbuf, const void *writebuf, |
4865 | ULONGESTunsigned long offset, LONGESTlong len) |
4866 | { |
4867 | struct remote_state *rs = get_remote_state (); |
4868 | int i; |
4869 | char *buf2 = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
4870 | char *p2 = &buf2[0]; |
4871 | char query_type; |
4872 | |
4873 | /* Handle memory using remote_xfer_memory. */ |
4874 | if (object == TARGET_OBJECT_MEMORY) |
4875 | { |
4876 | int xfered; |
4877 | errno(*__errno()) = 0; |
4878 | |
4879 | if (writebuf != NULL((void*)0)) |
4880 | { |
4881 | void *buffer = xmalloc (len); |
4882 | struct cleanup *cleanup = make_cleanup (xfree, buffer); |
4883 | memcpy (buffer, writebuf, len); |
4884 | xfered = remote_xfer_memory (offset, buffer, len, 1, NULL((void*)0), ops); |
4885 | do_cleanups (cleanup); |
4886 | } |
4887 | else |
4888 | xfered = remote_xfer_memory (offset, readbuf, len, 0, NULL((void*)0), ops); |
4889 | |
4890 | if (xfered > 0) |
4891 | return xfered; |
4892 | else if (xfered == 0 && errno(*__errno()) == 0) |
4893 | return 0; |
4894 | else |
4895 | return -1; |
4896 | } |
4897 | |
4898 | /* Only handle reads. */ |
4899 | if (writebuf != NULL((void*)0) || readbuf == NULL((void*)0)) |
4900 | return -1; |
4901 | |
4902 | /* Map pre-existing objects onto letters. DO NOT do this for new |
4903 | objects!!! Instead specify new query packets. */ |
4904 | switch (object) |
4905 | { |
4906 | case TARGET_OBJECT_KOD: |
4907 | query_type = 'K'; |
4908 | break; |
4909 | case TARGET_OBJECT_AVR: |
4910 | query_type = 'R'; |
4911 | break; |
4912 | |
4913 | case TARGET_OBJECT_AUXV: |
4914 | if (remote_protocol_qPart_auxv.support != PACKET_DISABLE) |
4915 | { |
4916 | unsigned int total = 0; |
4917 | while (len > 0) |
4918 | { |
4919 | LONGESTlong n = min ((rs->remote_packet_size - 2) / 2, len)(((rs->remote_packet_size - 2) / 2) < (len) ? ((rs-> remote_packet_size - 2) / 2) : (len)); |
4920 | snprintf (buf2, rs->remote_packet_size, |
4921 | "qPart:auxv:read::%s,%s", |
4922 | phex_nz (offset, sizeof offset), |
4923 | phex_nz (n, sizeof n)); |
4924 | i = putpkt (buf2); |
4925 | if (i < 0) |
4926 | return total > 0 ? total : i; |
4927 | buf2[0] = '\0'; |
4928 | getpkt (buf2, rs->remote_packet_size, 0); |
4929 | if (packet_ok (buf2, &remote_protocol_qPart_auxv) != PACKET_OK) |
4930 | return total > 0 ? total : -1; |
4931 | if (buf2[0] == 'O' && buf2[1] == 'K' && buf2[2] == '\0') |
4932 | break; /* Got EOF indicator. */ |
4933 | /* Got some data. */ |
4934 | i = hex2bin (buf2, readbuf, len); |
4935 | if (i > 0) |
4936 | { |
4937 | readbuf = (void *) ((char *) readbuf + i); |
4938 | offset += i; |
4939 | len -= i; |
4940 | total += i; |
4941 | } |
4942 | } |
4943 | return total; |
4944 | } |
4945 | return -1; |
4946 | |
4947 | default: |
4948 | return -1; |
4949 | } |
4950 | |
4951 | /* Note: a zero OFFSET and LEN can be used to query the minimum |
4952 | buffer size. */ |
4953 | if (offset == 0 && len == 0) |
4954 | return (rs->remote_packet_size); |
4955 | /* Minimum outbuf size is (rs->remote_packet_size) - if bufsiz is |
4956 | not large enough let the caller. */ |
4957 | if (len < (rs->remote_packet_size)) |
4958 | return -1; |
4959 | len = rs->remote_packet_size; |
4960 | |
4961 | /* except for querying the minimum buffer size, target must be open */ |
4962 | if (!remote_desc) |
4963 | error ("remote query is only available after target open"); |
4964 | |
4965 | gdb_assert (annex != NULL)((void) ((annex != ((void*)0)) ? 0 : (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/remote.c" , 4965, "%s: Assertion `%s' failed.", __PRETTY_FUNCTION__, "annex != NULL" ), 0))); |
4966 | gdb_assert (readbuf != NULL)((void) ((readbuf != ((void*)0)) ? 0 : (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/remote.c" , 4966, "%s: Assertion `%s' failed.", __PRETTY_FUNCTION__, "readbuf != NULL" ), 0))); |
4967 | |
4968 | *p2++ = 'q'; |
4969 | *p2++ = query_type; |
4970 | |
4971 | /* we used one buffer char for the remote protocol q command and another |
4972 | for the query type. As the remote protocol encapsulation uses 4 chars |
4973 | plus one extra in case we are debugging (remote_debug), |
4974 | we have PBUFZIZ - 7 left to pack the query string */ |
4975 | i = 0; |
4976 | while (annex[i] && (i < ((rs->remote_packet_size) - 8))) |
4977 | { |
4978 | /* Bad caller may have sent forbidden characters. */ |
4979 | gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#')((void) ((isprint (annex[i]) && annex[i] != '$' && annex[i] != '#') ? 0 : (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/remote.c" , 4979, "%s: Assertion `%s' failed.", __PRETTY_FUNCTION__, "isprint (annex[i]) && annex[i] != '$' && annex[i] != '#'" ), 0))); |
4980 | *p2++ = annex[i]; |
4981 | i++; |
4982 | } |
4983 | *p2 = '\0'; |
4984 | gdb_assert (annex[i] == '\0')((void) ((annex[i] == '\0') ? 0 : (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/remote.c" , 4984, "%s: Assertion `%s' failed.", __PRETTY_FUNCTION__, "annex[i] == '\\0'" ), 0))); |
4985 | |
4986 | i = putpkt (buf2); |
4987 | if (i < 0) |
4988 | return i; |
4989 | |
4990 | getpkt (readbuf, len, 0); |
4991 | |
4992 | return strlen (readbuf); |
4993 | } |
4994 | |
4995 | static void |
4996 | remote_rcmd (char *command, |
4997 | struct ui_file *outbuf) |
4998 | { |
4999 | struct remote_state *rs = get_remote_state (); |
5000 | int i; |
5001 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
5002 | char *p = buf; |
5003 | |
5004 | if (!remote_desc) |
5005 | error ("remote rcmd is only available after target open"); |
5006 | |
5007 | /* Send a NULL command across as an empty command */ |
5008 | if (command == NULL((void*)0)) |
5009 | command = ""; |
5010 | |
5011 | /* The query prefix */ |
5012 | strcpy (buf, "qRcmd,"); |
5013 | p = strchr (buf, '\0'); |
5014 | |
5015 | if ((strlen (buf) + strlen (command) * 2 + 8/*misc*/) > (rs->remote_packet_size)) |
5016 | error ("\"monitor\" command ``%s'' is too long\n", command); |
5017 | |
5018 | /* Encode the actual command */ |
5019 | bin2hex (command, p, 0); |
5020 | |
5021 | if (putpkt (buf) < 0) |
5022 | error ("Communication problem with target\n"); |
5023 | |
5024 | /* get/display the response */ |
5025 | while (1) |
5026 | { |
5027 | /* XXX - see also tracepoint.c:remote_get_noisy_reply() */ |
5028 | buf[0] = '\0'; |
5029 | getpkt (buf, (rs->remote_packet_size), 0); |
5030 | if (buf[0] == '\0') |
5031 | error ("Target does not support this command\n"); |
5032 | if (buf[0] == 'O' && buf[1] != 'K') |
5033 | { |
5034 | remote_console_output (buf + 1); /* 'O' message from stub */ |
5035 | continue; |
5036 | } |
5037 | if (strcmp (buf, "OK") == 0) |
5038 | break; |
5039 | if (strlen (buf) == 3 && buf[0] == 'E' |
5040 | && isdigit (buf[1]) && isdigit (buf[2])) |
5041 | { |
5042 | error ("Protocol error with Rcmd"); |
5043 | } |
5044 | for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2) |
5045 | { |
5046 | char c = (fromhex (p[0]) << 4) + fromhex (p[1]); |
5047 | fputc_unfiltered (c, outbuf); |
5048 | } |
5049 | break; |
5050 | } |
5051 | } |
5052 | |
5053 | static void |
5054 | packet_command (char *args, int from_tty) |
5055 | { |
5056 | struct remote_state *rs = get_remote_state (); |
5057 | char *buf = alloca (rs->remote_packet_size)__builtin_alloca(rs->remote_packet_size); |
5058 | |
5059 | if (!remote_desc) |
5060 | error ("command can only be used with remote target"); |
5061 | |
5062 | if (!args) |
5063 | error ("remote-packet command requires packet text as argument"); |
5064 | |
5065 | puts_filtered ("sending: "); |
5066 | print_packet (args); |
5067 | puts_filtered ("\n"); |
5068 | putpkt (args); |
5069 | |
5070 | getpkt (buf, (rs->remote_packet_size), 0); |
5071 | puts_filtered ("received: "); |
5072 | print_packet (buf); |
5073 | puts_filtered ("\n"); |
5074 | } |
5075 | |
5076 | #if 0 |
5077 | /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------------- */ |
5078 | |
5079 | static void display_thread_info (struct gdb_ext_thread_info *info); |
5080 | |
5081 | static void threadset_test_cmd (char *cmd, int tty); |
5082 | |
5083 | static void threadalive_test (char *cmd, int tty); |
5084 | |
5085 | static void threadlist_test_cmd (char *cmd, int tty); |
5086 | |
5087 | int get_and_display_threadinfo (threadref * ref); |
5088 | |
5089 | static void threadinfo_test_cmd (char *cmd, int tty); |
5090 | |
5091 | static int thread_display_step (threadref * ref, void *context); |
5092 | |
5093 | static void threadlist_update_test_cmd (char *cmd, int tty); |
5094 | |
5095 | static void init_remote_threadtests (void); |
5096 | |
5097 | #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid */ |
5098 | |
5099 | static void |
5100 | threadset_test_cmd (char *cmd, int tty) |
5101 | { |
5102 | int sample_thread = SAMPLE_THREAD; |
5103 | |
5104 | printf_filtered ("Remote threadset test\n"); |
5105 | set_thread (sample_thread, 1); |
5106 | } |
5107 | |
5108 | |
5109 | static void |
5110 | threadalive_test (char *cmd, int tty) |
5111 | { |
5112 | int sample_thread = SAMPLE_THREAD; |
5113 | |
5114 | if (remote_thread_alive (pid_to_ptid (sample_thread))) |
5115 | printf_filtered ("PASS: Thread alive test\n"); |
5116 | else |
5117 | printf_filtered ("FAIL: Thread alive test\n"); |
5118 | } |
5119 | |
5120 | void output_threadid (char *title, threadref * ref); |
5121 | |
5122 | void |
5123 | output_threadid (char *title, threadref *ref) |
5124 | { |
5125 | char hexid[20]; |
5126 | |
5127 | pack_threadid (&hexid[0], ref); /* Convert threead id into hex */ |
5128 | hexid[16] = 0; |
5129 | printf_filtered ("%s %s\n", title, (&hexid[0])); |
5130 | } |
5131 | |
5132 | static void |
5133 | threadlist_test_cmd (char *cmd, int tty) |
5134 | { |
5135 | int startflag = 1; |
5136 | threadref nextthread; |
5137 | int done, result_count; |
5138 | threadref threadlist[3]; |
5139 | |
5140 | printf_filtered ("Remote Threadlist test\n"); |
5141 | if (!remote_get_threadlist (startflag, &nextthread, 3, &done, |
5142 | &result_count, &threadlist[0])) |
5143 | printf_filtered ("FAIL: threadlist test\n"); |
5144 | else |
5145 | { |
5146 | threadref *scan = threadlist; |
5147 | threadref *limit = scan + result_count; |
5148 | |
5149 | while (scan < limit) |
5150 | output_threadid (" thread ", scan++); |
5151 | } |
5152 | } |
5153 | |
5154 | void |
5155 | display_thread_info (struct gdb_ext_thread_info *info) |
5156 | { |
5157 | output_threadid ("Threadid: ", &info->threadid); |
5158 | printf_filtered ("Name: %s\n ", info->shortname); |
5159 | printf_filtered ("State: %s\n", info->display); |
5160 | printf_filtered ("other: %s\n\n", info->more_display); |
5161 | } |
5162 | |
5163 | int |
5164 | get_and_display_threadinfo (threadref *ref) |
5165 | { |
5166 | int result; |
5167 | int set; |
5168 | struct gdb_ext_thread_info threadinfo; |
5169 | |
5170 | set = TAG_THREADID1 | TAG_EXISTS2 | TAG_THREADNAME8 |
5171 | | TAG_MOREDISPLAY16 | TAG_DISPLAY4; |
5172 | if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo))) |
5173 | display_thread_info (&threadinfo); |
5174 | return result; |
5175 | } |
5176 | |
5177 | static void |
5178 | threadinfo_test_cmd (char *cmd, int tty) |
5179 | { |
5180 | int athread = SAMPLE_THREAD; |
5181 | threadref thread; |
5182 | int set; |
5183 | |
5184 | int_to_threadref (&thread, athread); |
5185 | printf_filtered ("Remote Threadinfo test\n"); |
5186 | if (!get_and_display_threadinfo (&thread)) |
5187 | printf_filtered ("FAIL cannot get thread info\n"); |
5188 | } |
5189 | |
5190 | static int |
5191 | thread_display_step (threadref *ref, void *context) |
5192 | { |
5193 | /* output_threadid(" threadstep ",ref); *//* simple test */ |
5194 | return get_and_display_threadinfo (ref); |
5195 | } |
5196 | |
5197 | static void |
5198 | threadlist_update_test_cmd (char *cmd, int tty) |
5199 | { |
5200 | printf_filtered ("Remote Threadlist update test\n"); |
5201 | remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS1000); |
5202 | } |
5203 | |
5204 | static void |
5205 | init_remote_threadtests (void) |
5206 | { |
5207 | add_com ("tlist", class_obscure, threadlist_test_cmd, |
5208 | "Fetch and print the remote list of thread identifiers, one pkt only"); |
5209 | add_com ("tinfo", class_obscure, threadinfo_test_cmd, |
5210 | "Fetch and display info about one thread"); |
5211 | add_com ("tset", class_obscure, threadset_test_cmd, |
5212 | "Test setting to a different thread"); |
5213 | add_com ("tupd", class_obscure, threadlist_update_test_cmd, |
5214 | "Iterate through updating all remote thread info"); |
5215 | add_com ("talive", class_obscure, threadalive_test, |
5216 | " Remote thread alive test "); |
5217 | } |
5218 | |
5219 | #endif /* 0 */ |
5220 | |
5221 | /* Convert a thread ID to a string. Returns the string in a static |
5222 | buffer. */ |
5223 | |
5224 | static char * |
5225 | remote_pid_to_str (ptid_t ptid) |
5226 | { |
5227 | static char buf[30]; |
5228 | |
5229 | sprintf (buf, "Thread %d", PIDGET (ptid)(ptid_get_pid (ptid))); |
5230 | return buf; |
5231 | } |
5232 | |
5233 | static void |
5234 | init_remote_ops (void) |
5235 | { |
5236 | remote_ops.to_shortname = "remote"; |
5237 | remote_ops.to_longname = "Remote serial target in gdb-specific protocol"; |
5238 | remote_ops.to_doc = |
5239 | "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ |
5240 | Specify the serial device it is connected to\n\ |
5241 | (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."; |
5242 | remote_ops.to_open = remote_open; |
5243 | remote_ops.to_close = remote_close; |
5244 | remote_ops.to_detach = remote_detach; |
5245 | remote_ops.to_disconnect = remote_disconnect; |
5246 | remote_ops.to_resume = remote_resume; |
5247 | remote_ops.to_wait = remote_wait; |
5248 | remote_ops.to_fetch_registers = remote_fetch_registers; |
5249 | remote_ops.to_store_registers = remote_store_registers; |
5250 | remote_ops.to_prepare_to_store = remote_prepare_to_store; |
5251 | remote_ops.deprecated_xfer_memory = remote_xfer_memory; |
5252 | remote_ops.to_files_info = remote_files_info; |
5253 | remote_ops.to_insert_breakpoint = remote_insert_breakpoint; |
5254 | remote_ops.to_remove_breakpoint = remote_remove_breakpoint; |
5255 | remote_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint; |
5256 | remote_ops.to_stopped_data_address = remote_stopped_data_address; |
5257 | remote_ops.to_can_use_hw_breakpoint = remote_check_watch_resources; |
5258 | remote_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint; |
5259 | remote_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint; |
5260 | remote_ops.to_insert_watchpoint = remote_insert_watchpoint; |
5261 | remote_ops.to_remove_watchpoint = remote_remove_watchpoint; |
5262 | remote_ops.to_kill = remote_kill; |
5263 | remote_ops.to_load = generic_load; |
5264 | remote_ops.to_mourn_inferior = remote_mourn; |
5265 | remote_ops.to_thread_alive = remote_thread_alive; |
5266 | remote_ops.to_find_new_threads = remote_threads_info; |
5267 | remote_ops.to_pid_to_str = remote_pid_to_str; |
5268 | remote_ops.to_extra_thread_info = remote_threads_extra_info; |
5269 | remote_ops.to_stop = remote_stop; |
5270 | remote_ops.to_xfer_partial = remote_xfer_partial; |
5271 | remote_ops.to_rcmd = remote_rcmd; |
5272 | remote_ops.to_stratum = process_stratum; |
5273 | remote_ops.to_has_all_memory = 1; |
5274 | remote_ops.to_has_memory = 1; |
5275 | remote_ops.to_has_stack = 1; |
5276 | remote_ops.to_has_registers = 1; |
5277 | remote_ops.to_has_execution = 1; |
5278 | remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */ |
5279 | remote_ops.to_magic = OPS_MAGIC3840; |
5280 | } |
5281 | |
5282 | /* Set up the extended remote vector by making a copy of the standard |
5283 | remote vector and adding to it. */ |
5284 | |
5285 | static void |
5286 | init_extended_remote_ops (void) |
5287 | { |
5288 | extended_remote_ops = remote_ops; |
5289 | |
5290 | extended_remote_ops.to_shortname = "extended-remote"; |
5291 | extended_remote_ops.to_longname = |
5292 | "Extended remote serial target in gdb-specific protocol"; |
5293 | extended_remote_ops.to_doc = |
5294 | "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ |
5295 | Specify the serial device it is connected to (e.g. /dev/ttya).", |
5296 | extended_remote_ops.to_open = extended_remote_open; |
5297 | extended_remote_ops.to_create_inferior = extended_remote_create_inferior; |
5298 | extended_remote_ops.to_mourn_inferior = extended_remote_mourn; |
5299 | } |
5300 | |
5301 | static int |
5302 | remote_can_async_p (void) |
5303 | { |
5304 | /* We're async whenever the serial device is. */ |
5305 | return (current_target.to_async_mask_value) && serial_can_async_p (remote_desc); |
5306 | } |
5307 | |
5308 | static int |
5309 | remote_is_async_p (void) |
5310 | { |
5311 | /* We're async whenever the serial device is. */ |
5312 | return (current_target.to_async_mask_value) && serial_is_async_p (remote_desc); |
5313 | } |
5314 | |
5315 | /* Pass the SERIAL event on and up to the client. One day this code |
5316 | will be able to delay notifying the client of an event until the |
5317 | point where an entire packet has been received. */ |
5318 | |
5319 | static void (*async_client_callback) (enum inferior_event_type event_type, void *context); |
5320 | static void *async_client_context; |
5321 | static serial_event_ftype remote_async_serial_handler; |
5322 | |
5323 | static void |
5324 | remote_async_serial_handler (struct serial *scb, void *context) |
5325 | { |
5326 | /* Don't propogate error information up to the client. Instead let |
5327 | the client find out about the error by querying the target. */ |
5328 | async_client_callback (INF_REG_EVENT, async_client_context); |
5329 | } |
5330 | |
5331 | static void |
5332 | remote_async (void (*callback) (enum inferior_event_type event_type, void *context), void *context) |
5333 | { |
5334 | if (current_target.to_async_mask_value == 0) |
5335 | internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/remote.c", __LINE__5335, |
5336 | "Calling remote_async when async is masked"); |
5337 | |
5338 | if (callback != NULL((void*)0)) |
5339 | { |
5340 | serial_async (remote_desc, remote_async_serial_handler, NULL((void*)0)); |
5341 | async_client_callback = callback; |
5342 | async_client_context = context; |
5343 | } |
5344 | else |
5345 | serial_async (remote_desc, NULL((void*)0), NULL((void*)0)); |
5346 | } |
5347 | |
5348 | /* Target async and target extended-async. |
5349 | |
5350 | This are temporary targets, until it is all tested. Eventually |
5351 | async support will be incorporated int the usual 'remote' |
5352 | target. */ |
5353 | |
5354 | static void |
5355 | init_remote_async_ops (void) |
5356 | { |
5357 | remote_async_ops.to_shortname = "async"; |
5358 | remote_async_ops.to_longname = "Remote serial target in async version of the gdb-specific protocol"; |
5359 | remote_async_ops.to_doc = |
5360 | "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ |
5361 | Specify the serial device it is connected to (e.g. /dev/ttya)."; |
5362 | remote_async_ops.to_open = remote_async_open; |
5363 | remote_async_ops.to_close = remote_close; |
5364 | remote_async_ops.to_detach = remote_detach; |
5365 | remote_async_ops.to_disconnect = remote_disconnect; |
5366 | remote_async_ops.to_resume = remote_async_resume; |
5367 | remote_async_ops.to_wait = remote_async_wait; |
5368 | remote_async_ops.to_fetch_registers = remote_fetch_registers; |
5369 | remote_async_ops.to_store_registers = remote_store_registers; |
5370 | remote_async_ops.to_prepare_to_store = remote_prepare_to_store; |
5371 | remote_async_ops.deprecated_xfer_memory = remote_xfer_memory; |
5372 | remote_async_ops.to_files_info = remote_files_info; |
5373 | remote_async_ops.to_insert_breakpoint = remote_insert_breakpoint; |
5374 | remote_async_ops.to_remove_breakpoint = remote_remove_breakpoint; |
5375 | remote_async_ops.to_can_use_hw_breakpoint = remote_check_watch_resources; |
5376 | remote_async_ops.to_insert_hw_breakpoint = remote_insert_hw_breakpoint; |
5377 | remote_async_ops.to_remove_hw_breakpoint = remote_remove_hw_breakpoint; |
5378 | remote_async_ops.to_insert_watchpoint = remote_insert_watchpoint; |
5379 | remote_async_ops.to_remove_watchpoint = remote_remove_watchpoint; |
5380 | remote_async_ops.to_stopped_by_watchpoint = remote_stopped_by_watchpoint; |
5381 | remote_async_ops.to_stopped_data_address = remote_stopped_data_address; |
5382 | remote_async_ops.to_terminal_inferior = remote_async_terminal_inferior; |
5383 | remote_async_ops.to_terminal_ours = remote_async_terminal_ours; |
5384 | remote_async_ops.to_kill = remote_async_kill; |
5385 | remote_async_ops.to_load = generic_load; |
5386 | remote_async_ops.to_mourn_inferior = remote_async_mourn; |
5387 | remote_async_ops.to_thread_alive = remote_thread_alive; |
5388 | remote_async_ops.to_find_new_threads = remote_threads_info; |
5389 | remote_async_ops.to_pid_to_str = remote_pid_to_str; |
5390 | remote_async_ops.to_extra_thread_info = remote_threads_extra_info; |
5391 | remote_async_ops.to_stop = remote_stop; |
5392 | remote_async_ops.to_xfer_partial = remote_xfer_partial; |
5393 | remote_async_ops.to_rcmd = remote_rcmd; |
5394 | remote_async_ops.to_stratum = process_stratum; |
5395 | remote_async_ops.to_has_all_memory = 1; |
5396 | remote_async_ops.to_has_memory = 1; |
5397 | remote_async_ops.to_has_stack = 1; |
5398 | remote_async_ops.to_has_registers = 1; |
5399 | remote_async_ops.to_has_execution = 1; |
5400 | remote_async_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */ |
5401 | remote_async_ops.to_can_async_p = remote_can_async_p; |
5402 | remote_async_ops.to_is_async_p = remote_is_async_p; |
5403 | remote_async_ops.to_async = remote_async; |
5404 | remote_async_ops.to_async_mask_value = 1; |
5405 | remote_async_ops.to_magic = OPS_MAGIC3840; |
5406 | } |
5407 | |
5408 | /* Set up the async extended remote vector by making a copy of the standard |
5409 | remote vector and adding to it. */ |
5410 | |
5411 | static void |
5412 | init_extended_async_remote_ops (void) |
5413 | { |
5414 | extended_async_remote_ops = remote_async_ops; |
5415 | |
5416 | extended_async_remote_ops.to_shortname = "extended-async"; |
5417 | extended_async_remote_ops.to_longname = |
5418 | "Extended remote serial target in async gdb-specific protocol"; |
5419 | extended_async_remote_ops.to_doc = |
5420 | "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\ |
5421 | Specify the serial device it is connected to (e.g. /dev/ttya).", |
5422 | extended_async_remote_ops.to_open = extended_remote_async_open; |
5423 | extended_async_remote_ops.to_create_inferior = extended_remote_async_create_inferior; |
5424 | extended_async_remote_ops.to_mourn_inferior = extended_remote_mourn; |
5425 | } |
5426 | |
5427 | static void |
5428 | set_remote_cmd (char *args, int from_tty) |
5429 | { |
5430 | } |
5431 | |
5432 | static void |
5433 | show_remote_cmd (char *args, int from_tty) |
5434 | { |
5435 | /* FIXME: cagney/2002-06-15: This function should iterate over |
5436 | remote_show_cmdlist for a list of sub commands to show. */ |
5437 | show_remote_protocol_Z_packet_cmd (args, from_tty, NULL((void*)0)); |
5438 | show_remote_protocol_P_packet_cmd (args, from_tty, NULL((void*)0)); |
5439 | show_remote_protocol_p_packet_cmd (args, from_tty, NULL((void*)0)); |
5440 | show_remote_protocol_qSymbol_packet_cmd (args, from_tty, NULL((void*)0)); |
5441 | show_remote_protocol_vcont_packet_cmd (args, from_tty, NULL((void*)0)); |
5442 | show_remote_protocol_binary_download_cmd (args, from_tty, NULL((void*)0)); |
5443 | show_remote_protocol_qPart_auxv_packet_cmd (args, from_tty, NULL((void*)0)); |
5444 | } |
5445 | |
5446 | static void |
5447 | build_remote_gdbarch_data (void) |
5448 | { |
5449 | remote_address_size = TARGET_ADDR_BIT(gdbarch_addr_bit (current_gdbarch)); |
5450 | } |
5451 | |
5452 | /* Saved pointer to previous owner of the new_objfile event. */ |
5453 | static void (*remote_new_objfile_chain) (struct objfile *); |
5454 | |
5455 | /* Function to be called whenever a new objfile (shlib) is detected. */ |
5456 | static void |
5457 | remote_new_objfile (struct objfile *objfile) |
5458 | { |
5459 | if (remote_desc != 0) /* Have a remote connection */ |
5460 | { |
5461 | remote_check_symbols (objfile); |
5462 | } |
5463 | /* Call predecessor on chain, if any. */ |
5464 | if (remote_new_objfile_chain != 0 && |
5465 | remote_desc == 0) |
5466 | remote_new_objfile_chain (objfile); |
5467 | } |
5468 | |
5469 | void |
5470 | _initialize_remote (void) |
5471 | { |
5472 | static struct cmd_list_element *remote_set_cmdlist; |
5473 | static struct cmd_list_element *remote_show_cmdlist; |
5474 | struct cmd_list_element *tmpcmd; |
5475 | |
5476 | /* architecture specific data */ |
5477 | remote_gdbarch_data_handle = gdbarch_data_register_post_init (init_remote_state); |
5478 | |
5479 | /* Old tacky stuff. NOTE: This comes after the remote protocol so |
5480 | that the remote protocol has been initialized. */ |
5481 | DEPRECATED_REGISTER_GDBARCH_SWAP (remote_address_size)deprecated_register_gdbarch_swap (&(remote_address_size), sizeof ((remote_address_size)), ((void*)0)); |
5482 | deprecated_register_gdbarch_swap (NULL((void*)0), 0, build_remote_gdbarch_data); |
5483 | |
5484 | init_remote_ops (); |
5485 | add_target (&remote_ops); |
5486 | |
5487 | init_extended_remote_ops (); |
5488 | add_target (&extended_remote_ops); |
5489 | |
5490 | init_remote_async_ops (); |
5491 | add_target (&remote_async_ops); |
5492 | |
5493 | init_extended_async_remote_ops (); |
5494 | add_target (&extended_async_remote_ops); |
5495 | |
5496 | /* Hook into new objfile notification. */ |
5497 | remote_new_objfile_chain = deprecated_target_new_objfile_hook; |
5498 | deprecated_target_new_objfile_hook = remote_new_objfile; |
5499 | |
5500 | #if 0 |
5501 | init_remote_threadtests (); |
5502 | #endif |
5503 | |
5504 | /* set/show remote ... */ |
5505 | |
5506 | add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, "\ |
5507 | Remote protocol specific variables\n\ |
5508 | Configure various remote-protocol specific variables such as\n\ |
5509 | the packets being used", |
5510 | &remote_set_cmdlist, "set remote ", |
5511 | 0/*allow-unknown*/, &setlist); |
5512 | add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, "\ |
5513 | Remote protocol specific variables\n\ |
5514 | Configure various remote-protocol specific variables such as\n\ |
5515 | the packets being used", |
5516 | &remote_show_cmdlist, "show remote ", |
5517 | 0/*allow-unknown*/, &showlist); |
5518 | |
5519 | add_cmd ("compare-sections", class_obscure, compare_sections_command, |
5520 | "Compare section data on target to the exec file.\n\ |
5521 | Argument is a single section name (default: all loaded sections).", |
5522 | &cmdlist); |
5523 | |
5524 | add_cmd ("packet", class_maintenance, packet_command, |
5525 | "Send an arbitrary packet to a remote target.\n\ |
5526 | maintenance packet TEXT\n\ |
5527 | If GDB is talking to an inferior via the GDB serial protocol, then\n\ |
5528 | this command sends the string TEXT to the inferior, and displays the\n\ |
5529 | response packet. GDB supplies the initial `$' character, and the\n\ |
5530 | terminating `#' character and checksum.", |
5531 | &maintenancelist); |
5532 | |
5533 | add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, "\ |
5534 | Set whether to send break if interrupted.", "\ |
5535 | Show whether to send break if interrupted.", "\ |
5536 | If set, a break, instead of a cntrl-c, is sent to the remote target.", "\ |
5537 | Whether to send break if interrupted is %s.", |
5538 | NULL((void*)0), NULL((void*)0), |
5539 | &setlist, &showlist); |
5540 | |
5541 | /* Install commands for configuring memory read/write packets. */ |
5542 | |
5543 | add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, |
5544 | "Set the maximum number of bytes per memory write packet (deprecated).\n", |
5545 | &setlist); |
5546 | add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, |
5547 | "Show the maximum number of bytes per memory write packet (deprecated).\n", |
5548 | &showlist); |
5549 | add_cmd ("memory-write-packet-size", no_class, |
5550 | set_memory_write_packet_size, |
5551 | "Set the maximum number of bytes per memory-write packet.\n" |
5552 | "Specify the number of bytes in a packet or 0 (zero) for the\n" |
5553 | "default packet size. The actual limit is further reduced\n" |
5554 | "dependent on the target. Specify ``fixed'' to disable the\n" |
5555 | "further restriction and ``limit'' to enable that restriction\n", |
5556 | &remote_set_cmdlist); |
5557 | add_cmd ("memory-read-packet-size", no_class, |
5558 | set_memory_read_packet_size, |
5559 | "Set the maximum number of bytes per memory-read packet.\n" |
5560 | "Specify the number of bytes in a packet or 0 (zero) for the\n" |
5561 | "default packet size. The actual limit is further reduced\n" |
5562 | "dependent on the target. Specify ``fixed'' to disable the\n" |
5563 | "further restriction and ``limit'' to enable that restriction\n", |
5564 | &remote_set_cmdlist); |
5565 | add_cmd ("memory-write-packet-size", no_class, |
5566 | show_memory_write_packet_size, |
5567 | "Show the maximum number of bytes per memory-write packet.\n", |
5568 | &remote_show_cmdlist); |
5569 | add_cmd ("memory-read-packet-size", no_class, |
5570 | show_memory_read_packet_size, |
5571 | "Show the maximum number of bytes per memory-read packet.\n", |
5572 | &remote_show_cmdlist); |
5573 | |
5574 | add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class, |
5575 | &remote_hw_watchpoint_limit, "\ |
5576 | Set the maximum number of target hardware watchpoints.", "\ |
5577 | Show the maximum number of target hardware watchpoints.", "\ |
5578 | Specify a negative limit for unlimited.", "\ |
5579 | The maximum number of target hardware watchpoints is %s.", |
5580 | NULL((void*)0), NULL((void*)0), |
5581 | &remote_set_cmdlist, &remote_show_cmdlist); |
5582 | add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class, |
5583 | &remote_hw_breakpoint_limit, "\ |
5584 | Set the maximum number of target hardware breakpoints.", "\ |
5585 | Show the maximum number of target hardware breakpoints.", "\ |
5586 | Specify a negative limit for unlimited.", "\ |
5587 | The maximum number of target hardware breakpoints is %s.", |
5588 | NULL((void*)0), NULL((void*)0), |
5589 | &remote_set_cmdlist, &remote_show_cmdlist); |
5590 | |
5591 | deprecated_add_show_from_set |
5592 | (add_set_cmd ("remoteaddresssize", class_obscure, |
5593 | var_integer, (char *) &remote_address_size, |
5594 | "Set the maximum size of the address (in bits) \ |
5595 | in a memory packet.\n", |
5596 | &setlist), |
5597 | &showlist); |
5598 | |
5599 | add_packet_config_cmd (&remote_protocol_binary_download, |
5600 | "X", "binary-download", |
5601 | set_remote_protocol_binary_download_cmd, |
5602 | show_remote_protocol_binary_download_cmd, |
5603 | &remote_set_cmdlist, &remote_show_cmdlist, |
5604 | 1); |
5605 | #if 0 |
5606 | /* XXXX - should ``set remotebinarydownload'' be retained for |
5607 | compatibility. */ |
5608 | deprecated_add_show_from_set |
5609 | (add_set_cmd ("remotebinarydownload", no_class, |
5610 | var_boolean, (char *) &remote_binary_download, |
5611 | "Set binary downloads.\n", &setlist), |
5612 | &showlist); |
5613 | #endif |
5614 | |
5615 | add_packet_config_cmd (&remote_protocol_vcont, |
5616 | "vCont", "verbose-resume", |
5617 | set_remote_protocol_vcont_packet_cmd, |
5618 | show_remote_protocol_vcont_packet_cmd, |
5619 | &remote_set_cmdlist, &remote_show_cmdlist, |
5620 | 0); |
5621 | |
5622 | add_packet_config_cmd (&remote_protocol_qSymbol, |
5623 | "qSymbol", "symbol-lookup", |
5624 | set_remote_protocol_qSymbol_packet_cmd, |
5625 | show_remote_protocol_qSymbol_packet_cmd, |
5626 | &remote_set_cmdlist, &remote_show_cmdlist, |
5627 | 0); |
5628 | |
5629 | add_packet_config_cmd (&remote_protocol_P, |
5630 | "P", "set-register", |
5631 | set_remote_protocol_P_packet_cmd, |
5632 | show_remote_protocol_P_packet_cmd, |
5633 | &remote_set_cmdlist, &remote_show_cmdlist, |
5634 | 1); |
5635 | |
5636 | add_packet_config_cmd (&remote_protocol_p, |
5637 | "p", "fetch-register", |
5638 | set_remote_protocol_p_packet_cmd, |
5639 | show_remote_protocol_p_packet_cmd, |
5640 | &remote_set_cmdlist, &remote_show_cmdlist, |
5641 | 1); |
5642 | |
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, |
5648 | 0); |
5649 | |
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, |
5655 | 0); |
5656 | |
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, |
5662 | 0); |
5663 | |
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, |
5669 | 0); |
5670 | |
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, |
5676 | 0); |
5677 | |
5678 | add_packet_config_cmd (&remote_protocol_qPart_auxv, |
5679 | "qPart_auxv", "read-aux-vector", |
5680 | set_remote_protocol_qPart_auxv_packet_cmd, |
5681 | show_remote_protocol_qPart_auxv_packet_cmd, |
5682 | &remote_set_cmdlist, &remote_show_cmdlist, |
5683 | 0); |
5684 | |
5685 | /* Keep the old ``set remote Z-packet ...'' working. */ |
5686 | add_setshow_auto_boolean_cmd ("Z-packet", class_obscure, |
5687 | &remote_Z_packet_detect, "\ |
5688 | Set use of remote protocol `Z' packets", "\ |
5689 | Show use of remote protocol `Z' packets ", "\ |
5690 | When set, GDB will attempt to use the remote breakpoint and watchpoint\n\ |
5691 | packets.", "\ |
5692 | Use of remote protocol `Z' packets is %s", |
5693 | set_remote_protocol_Z_packet_cmd, |
5694 | show_remote_protocol_Z_packet_cmd, |
5695 | &remote_set_cmdlist, &remote_show_cmdlist); |
5696 | |
5697 | /* Eventually initialize fileio. See fileio.c */ |
5698 | initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist); |
5699 | } |