Commit | Line | Data |
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c906108c | 1 | /* Remote target communications for serial-line targets in custom GDB protocol |
43ff13b4 | 2 | Copyright 1988, 91, 92, 93, 94, 95, 96, 97, 98, 1999 |
c906108c SS |
3 | Free Software Foundation, Inc. |
4 | ||
c5aa993b JM |
5 | This file is part of GDB. |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
c5aa993b | 21 | |
96baa820 | 22 | /* See the GDB User Guide for details of the GDB remote protocol. */ |
c5aa993b | 23 | |
c906108c SS |
24 | #include "defs.h" |
25 | #include "gdb_string.h" | |
26 | #include <ctype.h> | |
27 | #include <fcntl.h> | |
28 | #include "frame.h" | |
29 | #include "inferior.h" | |
30 | #include "bfd.h" | |
31 | #include "symfile.h" | |
32 | #include "target.h" | |
33 | #include "wait.h" | |
c5aa993b | 34 | /*#include "terminal.h" */ |
c906108c SS |
35 | #include "gdbcmd.h" |
36 | #include "objfiles.h" | |
37 | #include "gdb-stabs.h" | |
38 | #include "gdbthread.h" | |
c2c6d25f | 39 | #include "remote.h" |
c906108c SS |
40 | |
41 | #include "dcache.h" | |
42 | ||
7a292a7a | 43 | #include <ctype.h> |
9846de1b | 44 | #include <sys/time.h> |
c906108c SS |
45 | #ifdef USG |
46 | #include <sys/types.h> | |
47 | #endif | |
48 | ||
43ff13b4 | 49 | #include "event-loop.h" |
c2c6d25f | 50 | #include "event-top.h" |
2acceee2 | 51 | #include "inf-loop.h" |
43ff13b4 | 52 | |
c906108c SS |
53 | #include <signal.h> |
54 | #include "serial.h" | |
55 | ||
56 | /* Prototypes for local functions */ | |
6426a772 JM |
57 | static void cleanup_sigint_signal_handler (void *dummy); |
58 | static void initialize_sigint_signal_handler (void); | |
59 | ||
43ff13b4 JM |
60 | static void handle_remote_sigint PARAMS ((int)); |
61 | static void handle_remote_sigint_twice PARAMS ((int)); | |
62 | static void async_remote_interrupt PARAMS ((gdb_client_data)); | |
2df3850c | 63 | void async_remote_interrupt_twice PARAMS ((gdb_client_data)); |
43ff13b4 | 64 | |
0f71a2f6 JM |
65 | static void build_remote_gdbarch_data PARAMS ((void)); |
66 | ||
917317f4 | 67 | static int remote_write_bytes (CORE_ADDR memaddr, char *myaddr, int len); |
c906108c SS |
68 | |
69 | static int remote_read_bytes PARAMS ((CORE_ADDR memaddr, | |
70 | char *myaddr, int len)); | |
71 | ||
c5aa993b | 72 | static void remote_files_info PARAMS ((struct target_ops * ignore)); |
c906108c | 73 | |
c5aa993b | 74 | static int remote_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, |
c906108c SS |
75 | int len, int should_write, |
76 | struct target_ops * target)); | |
77 | ||
78 | static void remote_prepare_to_store PARAMS ((void)); | |
79 | ||
80 | static void remote_fetch_registers PARAMS ((int regno)); | |
81 | ||
82 | static void remote_resume PARAMS ((int pid, int step, | |
83 | enum target_signal siggnal)); | |
43ff13b4 | 84 | static void remote_async_resume PARAMS ((int pid, int step, |
c5aa993b | 85 | enum target_signal siggnal)); |
c906108c SS |
86 | static int remote_start_remote PARAMS ((PTR)); |
87 | ||
88 | static void remote_open PARAMS ((char *name, int from_tty)); | |
43ff13b4 | 89 | static void remote_async_open PARAMS ((char *name, int from_tty)); |
c906108c SS |
90 | |
91 | static void extended_remote_open PARAMS ((char *name, int from_tty)); | |
43ff13b4 | 92 | static void extended_remote_async_open PARAMS ((char *name, int from_tty)); |
c906108c SS |
93 | |
94 | static void remote_open_1 PARAMS ((char *, int, struct target_ops *, | |
95 | int extended_p)); | |
43ff13b4 | 96 | static void remote_async_open_1 PARAMS ((char *, int, struct target_ops *, |
c5aa993b | 97 | int extended_p)); |
c906108c SS |
98 | |
99 | static void remote_close PARAMS ((int quitting)); | |
100 | ||
101 | static void remote_store_registers PARAMS ((int regno)); | |
102 | ||
103 | static void remote_mourn PARAMS ((void)); | |
53a5351d | 104 | static void remote_async_mourn PARAMS ((void)); |
c906108c SS |
105 | |
106 | static void extended_remote_restart PARAMS ((void)); | |
107 | ||
108 | static void extended_remote_mourn PARAMS ((void)); | |
109 | ||
110 | static void extended_remote_create_inferior PARAMS ((char *, char *, char **)); | |
43ff13b4 | 111 | static void extended_remote_async_create_inferior PARAMS ((char *, char *, char **)); |
c906108c SS |
112 | |
113 | static void remote_mourn_1 PARAMS ((struct target_ops *)); | |
114 | ||
115 | static void remote_send PARAMS ((char *buf)); | |
116 | ||
117 | static int readchar PARAMS ((int timeout)); | |
118 | ||
119 | static int remote_wait PARAMS ((int pid, struct target_waitstatus * status)); | |
43ff13b4 | 120 | static int remote_async_wait PARAMS ((int pid, struct target_waitstatus * status)); |
c906108c SS |
121 | |
122 | static void remote_kill PARAMS ((void)); | |
43ff13b4 | 123 | static void remote_async_kill PARAMS ((void)); |
c906108c SS |
124 | |
125 | static int tohex PARAMS ((int nib)); | |
126 | ||
127 | static void remote_detach PARAMS ((char *args, int from_tty)); | |
43ff13b4 | 128 | static void remote_async_detach PARAMS ((char *args, int from_tty)); |
c906108c SS |
129 | |
130 | static void remote_interrupt PARAMS ((int signo)); | |
131 | ||
7a292a7a SS |
132 | static void remote_interrupt_twice PARAMS ((int signo)); |
133 | ||
c906108c SS |
134 | static void interrupt_query PARAMS ((void)); |
135 | ||
136 | static void set_thread PARAMS ((int, int)); | |
137 | ||
138 | static int remote_thread_alive PARAMS ((int)); | |
139 | ||
140 | static void get_offsets PARAMS ((void)); | |
141 | ||
142 | static int read_frame PARAMS ((char *)); | |
143 | ||
144 | static int remote_insert_breakpoint PARAMS ((CORE_ADDR, char *)); | |
145 | ||
146 | static int remote_remove_breakpoint PARAMS ((CORE_ADDR, char *)); | |
147 | ||
148 | static int hexnumlen PARAMS ((ULONGEST num)); | |
149 | ||
150 | static void init_remote_ops PARAMS ((void)); | |
151 | ||
152 | static void init_extended_remote_ops PARAMS ((void)); | |
153 | ||
0f71a2f6 JM |
154 | static void init_remote_cisco_ops PARAMS ((void)); |
155 | ||
156 | static struct target_ops remote_cisco_ops; | |
157 | ||
c906108c SS |
158 | static void remote_stop PARAMS ((void)); |
159 | ||
160 | static int ishex PARAMS ((int ch, int *val)); | |
161 | ||
162 | static int stubhex PARAMS ((int ch)); | |
163 | ||
c5aa993b | 164 | static int remote_query PARAMS ((int /*char */ , char *, char *, int *)); |
c906108c SS |
165 | |
166 | static int hexnumstr PARAMS ((char *, ULONGEST)); | |
167 | ||
2df3850c JM |
168 | static int hexnumnstr PARAMS ((char *, ULONGEST, int)); |
169 | ||
c906108c SS |
170 | static CORE_ADDR remote_address_masked PARAMS ((CORE_ADDR)); |
171 | ||
172 | static void print_packet PARAMS ((char *)); | |
173 | ||
174 | static unsigned long crc32 PARAMS ((unsigned char *, int, unsigned int)); | |
175 | ||
176 | static void compare_sections_command PARAMS ((char *, int)); | |
177 | ||
178 | static void packet_command PARAMS ((char *, int)); | |
179 | ||
180 | static int stub_unpack_int PARAMS ((char *buff, int fieldlength)); | |
181 | ||
c906108c SS |
182 | static int remote_current_thread PARAMS ((int oldpid)); |
183 | ||
cce74817 | 184 | static void remote_find_new_threads PARAMS ((void)); |
c906108c SS |
185 | |
186 | static void record_currthread PARAMS ((int currthread)); | |
187 | ||
c906108c SS |
188 | /* exported functions */ |
189 | ||
190 | extern int fromhex PARAMS ((int a)); | |
191 | ||
c906108c SS |
192 | static int putpkt_binary PARAMS ((char *buf, int cnt)); |
193 | ||
c906108c SS |
194 | static void check_binary_download PARAMS ((CORE_ADDR addr)); |
195 | ||
5a2468f5 | 196 | struct packet_config; |
5a2468f5 JM |
197 | |
198 | static void show_packet_config_cmd PARAMS ((struct packet_config * config)); | |
199 | ||
200 | static void set_packet_config_cmd PARAMS ((struct packet_config * config, | |
201 | struct cmd_list_element * c)); | |
202 | ||
203 | static void add_packet_config_cmd PARAMS ((struct packet_config * config, | |
204 | char *name, | |
205 | char *title, | |
206 | void (*set_func) (char *args, int from_tty, struct cmd_list_element * c), | |
207 | void (*show_func) (char *name, int from_tty), | |
208 | struct cmd_list_element **setlist, | |
209 | struct cmd_list_element **showlist)); | |
210 | ||
211 | static void init_packet_config PARAMS ((struct packet_config * config)); | |
212 | ||
213 | static void set_remote_protocol_P_packet_cmd PARAMS ((char *args, | |
214 | int from_tty, | |
215 | struct cmd_list_element * c)); | |
216 | ||
217 | static void show_remote_protocol_P_packet_cmd PARAMS ((char *args, | |
218 | int from_tty)); | |
219 | ||
96baa820 JM |
220 | static void set_remote_protocol_Z_packet_cmd PARAMS ((char *args, |
221 | int from_tty, | |
222 | struct cmd_list_element * c)); | |
223 | ||
224 | static void show_remote_protocol_Z_packet_cmd PARAMS ((char *args, | |
225 | int from_tty)); | |
226 | ||
5a2468f5 JM |
227 | |
228 | ||
229 | ||
c906108c SS |
230 | /* Define the target subroutine names */ |
231 | ||
232 | void open_remote_target PARAMS ((char *, int, struct target_ops *, int)); | |
233 | ||
234 | void _initialize_remote PARAMS ((void)); | |
235 | ||
236 | /* */ | |
237 | ||
238 | static struct target_ops remote_ops; | |
239 | ||
240 | static struct target_ops extended_remote_ops; | |
241 | ||
43ff13b4 JM |
242 | /* Temporary target ops. Just like the remote_ops and |
243 | extended_remote_ops, but with asynchronous support. */ | |
244 | static struct target_ops remote_async_ops; | |
245 | ||
246 | static struct target_ops extended_async_remote_ops; | |
247 | ||
c906108c SS |
248 | /* This was 5 seconds, which is a long time to sit and wait. |
249 | Unless this is going though some terminal server or multiplexer or | |
250 | other form of hairy serial connection, I would think 2 seconds would | |
251 | be plenty. */ | |
252 | ||
253 | /* Changed to allow option to set timeout value. | |
254 | was static int remote_timeout = 2; */ | |
255 | extern int remote_timeout; | |
256 | ||
6426a772 JM |
257 | /* FIXME: cagney/1999-09-23: Even though getpkt was called with |
258 | ``forever'' still use the normal timeout mechanism. This is | |
259 | currently used by the ASYNC code to guarentee that target reads | |
260 | during the initial connect always time-out. Once getpkt has been | |
261 | modified to return a timeout indication and, in turn | |
262 | remote_wait()/wait_for_inferior() have gained a timeout parameter | |
263 | this can go away. */ | |
264 | static int wait_forever_enabled_p = 1; | |
265 | ||
266 | ||
c906108c SS |
267 | /* This variable chooses whether to send a ^C or a break when the user |
268 | requests program interruption. Although ^C is usually what remote | |
269 | systems expect, and that is the default here, sometimes a break is | |
270 | preferable instead. */ | |
271 | ||
272 | static int remote_break; | |
273 | ||
c906108c SS |
274 | /* Descriptor for I/O to remote machine. Initialize it to NULL so that |
275 | remote_open knows that we don't have a file open when the program | |
276 | starts. */ | |
277 | static serial_t remote_desc = NULL; | |
278 | ||
0f71a2f6 JM |
279 | /* This is set by the target (thru the 'S' message) |
280 | to denote that the target is in kernel mode. */ | |
281 | static int cisco_kernel_mode = 0; | |
282 | ||
cce74817 JM |
283 | /* Maximum number of bytes to read/write at once. The value here |
284 | is chosen to fill up a packet (the headers account for the 32). */ | |
285 | #define MAXBUFBYTES(N) (((N)-32)/2) | |
286 | ||
c906108c SS |
287 | /* Having this larger than 400 causes us to be incompatible with m68k-stub.c |
288 | and i386-stub.c. Normally, no one would notice because it only matters | |
289 | for writing large chunks of memory (e.g. in downloads). Also, this needs | |
290 | to be more than 400 if required to hold the registers (see below, where | |
291 | we round it up based on REGISTER_BYTES). */ | |
c906108c | 292 | /* Round up PBUFSIZ to hold all the registers, at least. */ |
cce74817 JM |
293 | #define PBUFSIZ ((REGISTER_BYTES > MAXBUFBYTES (400)) \ |
294 | ? (REGISTER_BYTES * 2 + 32) \ | |
295 | : 400) | |
c906108c SS |
296 | |
297 | ||
298 | /* This variable sets the number of bytes to be written to the target | |
299 | in a single packet. Normally PBUFSIZ is satisfactory, but some | |
300 | targets need smaller values (perhaps because the receiving end | |
301 | is slow). */ | |
302 | ||
cce74817 | 303 | static int remote_write_size; |
c906108c SS |
304 | |
305 | /* This variable sets the number of bits in an address that are to be | |
306 | sent in a memory ("M" or "m") packet. Normally, after stripping | |
307 | leading zeros, the entire address would be sent. This variable | |
308 | restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The | |
309 | initial implementation of remote.c restricted the address sent in | |
310 | memory packets to ``host::sizeof long'' bytes - (typically 32 | |
311 | bits). Consequently, for 64 bit targets, the upper 32 bits of an | |
312 | address was never sent. Since fixing this bug may cause a break in | |
313 | some remote targets this variable is principly provided to | |
314 | facilitate backward compatibility. */ | |
315 | ||
316 | static int remote_address_size; | |
317 | ||
318 | /* This is the size (in chars) of the first response to the `g' command. This | |
319 | is used to limit the size of the memory read and write commands to prevent | |
320 | stub buffers from overflowing. The size does not include headers and | |
321 | trailers, it is only the payload size. */ | |
322 | ||
323 | static int remote_register_buf_size = 0; | |
324 | ||
6426a772 JM |
325 | /* Tempoary to track who currently owns the terminal. See |
326 | target_async_terminal_* for more details. */ | |
327 | ||
328 | static int remote_async_terminal_ours_p; | |
329 | ||
5a2468f5 JM |
330 | /* Generic configuration support for packets the stub optionally |
331 | supports. Allows the user to specify the use of the packet as well | |
332 | as allowing GDB to auto-detect support in the remote stub. */ | |
333 | ||
334 | enum packet_support | |
335 | { | |
336 | PACKET_SUPPORT_UNKNOWN = 0, | |
337 | PACKET_ENABLE, | |
338 | PACKET_DISABLE | |
339 | }; | |
340 | ||
341 | enum packet_detect | |
342 | { | |
343 | PACKET_AUTO_DETECT = 0, | |
344 | PACKET_MANUAL_DETECT | |
345 | }; | |
346 | ||
347 | struct packet_config | |
348 | { | |
349 | char *state; | |
350 | char *name; | |
351 | char *title; | |
352 | enum packet_detect detect; | |
353 | enum packet_support support; | |
354 | }; | |
355 | ||
356 | static char packet_support_auto[] = "auto"; | |
357 | static char packet_enable[] = "enable"; | |
358 | static char packet_disable[] = "disable"; | |
359 | static char *packet_support_enums[] = | |
360 | { | |
361 | packet_support_auto, | |
362 | packet_enable, | |
363 | packet_disable, | |
364 | 0, | |
365 | }; | |
366 | ||
367 | static void | |
368 | set_packet_config_cmd (config, c) | |
369 | struct packet_config *config; | |
370 | struct cmd_list_element *c; | |
371 | { | |
372 | if (config->state == packet_enable) | |
373 | { | |
374 | config->detect = PACKET_MANUAL_DETECT; | |
375 | config->support = PACKET_ENABLE; | |
376 | } | |
377 | else if (config->state == packet_disable) | |
378 | { | |
379 | config->detect = PACKET_MANUAL_DETECT; | |
380 | config->support = PACKET_DISABLE; | |
381 | } | |
382 | else if (config->state == packet_support_auto) | |
383 | { | |
384 | config->detect = PACKET_AUTO_DETECT; | |
385 | config->support = PACKET_SUPPORT_UNKNOWN; | |
386 | } | |
387 | else | |
96baa820 | 388 | internal_error ("Bad enum value"); |
5a2468f5 JM |
389 | } |
390 | ||
391 | static void | |
392 | show_packet_config_cmd (config) | |
393 | struct packet_config *config; | |
394 | { | |
395 | char *support = "internal-error"; | |
396 | switch (config->support) | |
397 | { | |
398 | case PACKET_ENABLE: | |
399 | support = "enabled"; | |
400 | break; | |
401 | case PACKET_DISABLE: | |
402 | support = "disabled"; | |
403 | break; | |
404 | case PACKET_SUPPORT_UNKNOWN: | |
405 | support = "unknown"; | |
406 | break; | |
407 | } | |
408 | switch (config->detect) | |
409 | { | |
410 | case PACKET_AUTO_DETECT: | |
411 | printf_filtered ("Support for remote protocol `%s' (%s) packet is auto-detected, currently %s.\n", | |
412 | config->name, config->title, support); | |
413 | break; | |
414 | case PACKET_MANUAL_DETECT: | |
415 | printf_filtered ("Support for remote protocol `%s' (%s) is currently %s.\n", | |
416 | config->name, config->title, support); | |
417 | } | |
418 | } | |
419 | ||
420 | static void | |
421 | add_packet_config_cmd (config, name, title, set_func, show_func, | |
422 | setlist, showlist) | |
423 | struct packet_config *config; | |
424 | char *name; | |
425 | char *title; | |
426 | void (*set_func) PARAMS ((char *args, int from_tty, | |
427 | struct cmd_list_element * c)); | |
428 | void (*show_func) PARAMS ((char *name, int from_tty)); | |
429 | struct cmd_list_element **setlist; | |
430 | struct cmd_list_element **showlist; | |
431 | { | |
432 | struct cmd_list_element *c; | |
433 | char *set_doc; | |
434 | char *show_doc; | |
435 | char *full_name; | |
436 | config->name = name; | |
437 | config->title = title; | |
438 | asprintf (&set_doc, "Set use of remote protocol `%s' (%s) packet", | |
439 | name, title); | |
440 | asprintf (&show_doc, "Show current use of remote protocol `%s' (%s) packet", | |
441 | name, title); | |
442 | asprintf (&full_name, "%s-packet", name); | |
443 | c = add_set_enum_cmd (full_name, | |
444 | class_obscure, packet_support_enums, | |
445 | (char *) &config->state, | |
446 | set_doc, setlist); | |
447 | c->function.sfunc = set_func; | |
448 | add_cmd (full_name, class_obscure, show_func, show_doc, showlist); | |
449 | } | |
450 | ||
451 | static void | |
452 | init_packet_config (config) | |
453 | struct packet_config *config; | |
454 | { | |
455 | switch (config->detect) | |
456 | { | |
457 | case PACKET_AUTO_DETECT: | |
458 | config->support = PACKET_SUPPORT_UNKNOWN; | |
459 | break; | |
460 | case PACKET_MANUAL_DETECT: | |
461 | /* let the user beware */ | |
462 | break; | |
463 | } | |
464 | } | |
465 | ||
466 | /* Should we try the 'P' (set register) request? */ | |
467 | ||
468 | static struct packet_config remote_protocol_P; | |
469 | ||
470 | static void | |
471 | set_remote_protocol_P_packet_cmd (args, from_tty, c) | |
472 | char *args; | |
473 | int from_tty; | |
474 | struct cmd_list_element *c; | |
475 | { | |
476 | set_packet_config_cmd (&remote_protocol_P, c); | |
477 | } | |
478 | ||
479 | static void | |
480 | show_remote_protocol_P_packet_cmd (args, from_tty) | |
481 | char *args; | |
482 | int from_tty; | |
483 | { | |
484 | show_packet_config_cmd (&remote_protocol_P); | |
485 | } | |
486 | ||
96baa820 JM |
487 | /* Should we try the 'Z' (set breakpoint) request? */ |
488 | ||
489 | static struct packet_config remote_protocol_Z; | |
490 | ||
491 | static void | |
492 | set_remote_protocol_Z_packet_cmd (args, from_tty, c) | |
493 | char *args; | |
494 | int from_tty; | |
495 | struct cmd_list_element *c; | |
496 | { | |
497 | set_packet_config_cmd (&remote_protocol_Z, c); | |
498 | } | |
499 | ||
500 | static void | |
501 | show_remote_protocol_Z_packet_cmd (args, from_tty) | |
502 | char *args; | |
503 | int from_tty; | |
504 | { | |
505 | show_packet_config_cmd (&remote_protocol_Z); | |
506 | } | |
507 | ||
508 | /* Should we try the 'X' (remote binary download) packet? | |
509 | ||
510 | This variable (available to the user via "set remote X-packet") | |
511 | dictates whether downloads are sent in binary (via the 'X' packet). | |
512 | We assume that the stub can, and attempt to do it. This will be | |
513 | cleared if the stub does not understand it. This switch is still | |
514 | needed, though in cases when the packet is supported in the stub, | |
515 | but the connection does not allow it (i.e., 7-bit serial connection | |
516 | only). */ | |
517 | ||
518 | static struct packet_config remote_protocol_binary_download; | |
519 | ||
520 | static void | |
521 | set_remote_protocol_binary_download_cmd (char *args, | |
522 | int from_tty, | |
523 | struct cmd_list_element *c) | |
524 | { | |
525 | set_packet_config_cmd (&remote_protocol_binary_download, c); | |
526 | } | |
527 | ||
528 | static void | |
529 | show_remote_protocol_binary_download_cmd (char *args, | |
530 | int from_tty) | |
531 | { | |
532 | show_packet_config_cmd (&remote_protocol_binary_download); | |
533 | } | |
534 | ||
c906108c | 535 | |
43ff13b4 JM |
536 | /* Tokens for use by the asynchronous signal handlers for SIGINT */ |
537 | PTR sigint_remote_twice_token; | |
538 | PTR sigint_remote_token; | |
539 | ||
c906108c SS |
540 | /* These are pointers to hook functions that may be set in order to |
541 | modify resume/wait behavior for a particular architecture. */ | |
542 | ||
543 | void (*target_resume_hook) PARAMS ((void)); | |
544 | void (*target_wait_loop_hook) PARAMS ((void)); | |
c906108c SS |
545 | \f |
546 | ||
c5aa993b | 547 | |
c906108c SS |
548 | /* These are the threads which we last sent to the remote system. |
549 | -1 for all or -2 for not sent yet. */ | |
550 | static int general_thread; | |
cce74817 | 551 | static int continue_thread; |
c906108c SS |
552 | |
553 | /* Call this function as a result of | |
554 | 1) A halt indication (T packet) containing a thread id | |
555 | 2) A direct query of currthread | |
556 | 3) Successful execution of set thread | |
557 | */ | |
558 | ||
559 | static void | |
560 | record_currthread (currthread) | |
561 | int currthread; | |
562 | { | |
c906108c | 563 | general_thread = currthread; |
cce74817 | 564 | |
c906108c SS |
565 | /* If this is a new thread, add it to GDB's thread list. |
566 | If we leave it up to WFI to do this, bad things will happen. */ | |
567 | if (!in_thread_list (currthread)) | |
0f71a2f6 JM |
568 | { |
569 | add_thread (currthread); | |
570 | printf_filtered ("[New %s]\n", target_pid_to_str (currthread)); | |
571 | } | |
c906108c SS |
572 | } |
573 | ||
574 | #define MAGIC_NULL_PID 42000 | |
575 | ||
576 | static void | |
577 | set_thread (th, gen) | |
578 | int th; | |
579 | int gen; | |
580 | { | |
085dd6e6 | 581 | char *buf = alloca (PBUFSIZ); |
cce74817 | 582 | int state = gen ? general_thread : continue_thread; |
c906108c SS |
583 | |
584 | if (state == th) | |
585 | return; | |
586 | ||
587 | buf[0] = 'H'; | |
588 | buf[1] = gen ? 'g' : 'c'; | |
589 | if (th == MAGIC_NULL_PID) | |
590 | { | |
591 | buf[2] = '0'; | |
592 | buf[3] = '\0'; | |
593 | } | |
594 | else if (th < 0) | |
595 | sprintf (&buf[2], "-%x", -th); | |
596 | else | |
597 | sprintf (&buf[2], "%x", th); | |
598 | putpkt (buf); | |
599 | getpkt (buf, 0); | |
600 | if (gen) | |
c5aa993b | 601 | general_thread = th; |
c906108c | 602 | else |
cce74817 | 603 | continue_thread = th; |
c906108c SS |
604 | } |
605 | \f | |
606 | /* Return nonzero if the thread TH is still alive on the remote system. */ | |
607 | ||
608 | static int | |
cce74817 JM |
609 | remote_thread_alive (tid) |
610 | int tid; | |
c906108c | 611 | { |
cce74817 | 612 | char buf[16]; |
c906108c | 613 | |
cce74817 JM |
614 | if (tid < 0) |
615 | sprintf (buf, "T-%08x", -tid); | |
c906108c | 616 | else |
cce74817 | 617 | sprintf (buf, "T%08x", tid); |
c906108c SS |
618 | putpkt (buf); |
619 | getpkt (buf, 0); | |
620 | return (buf[0] == 'O' && buf[1] == 'K'); | |
621 | } | |
622 | ||
623 | /* About these extended threadlist and threadinfo packets. They are | |
624 | variable length packets but, the fields within them are often fixed | |
625 | length. They are redundent enough to send over UDP as is the | |
626 | remote protocol in general. There is a matching unit test module | |
627 | in libstub. */ | |
628 | ||
cce74817 JM |
629 | #define OPAQUETHREADBYTES 8 |
630 | ||
631 | /* a 64 bit opaque identifier */ | |
632 | typedef unsigned char threadref[OPAQUETHREADBYTES]; | |
633 | ||
634 | /* WARNING: This threadref data structure comes from the remote O.S., libstub | |
635 | protocol encoding, and remote.c. it is not particularly changable */ | |
636 | ||
637 | /* Right now, the internal structure is int. We want it to be bigger. | |
638 | Plan to fix this. | |
c5aa993b | 639 | */ |
cce74817 | 640 | |
c5aa993b | 641 | typedef int gdb_threadref; /* internal GDB thread reference */ |
cce74817 JM |
642 | |
643 | /* gdb_ext_thread_info is an internal GDB data structure which is | |
644 | equivalint to the reply of the remote threadinfo packet */ | |
645 | ||
646 | struct gdb_ext_thread_info | |
c5aa993b JM |
647 | { |
648 | threadref threadid; /* External form of thread reference */ | |
649 | int active; /* Has state interesting to GDB? , regs, stack */ | |
650 | char display[256]; /* Brief state display, name, blocked/syspended */ | |
651 | char shortname[32]; /* To be used to name threads */ | |
652 | char more_display[256]; /* Long info, statistics, queue depth, whatever */ | |
653 | }; | |
cce74817 JM |
654 | |
655 | /* The volume of remote transfers can be limited by submitting | |
656 | a mask containing bits specifying the desired information. | |
657 | Use a union of these values as the 'selection' parameter to | |
658 | get_thread_info. FIXME: Make these TAG names more thread specific. | |
c5aa993b | 659 | */ |
cce74817 JM |
660 | |
661 | #define TAG_THREADID 1 | |
662 | #define TAG_EXISTS 2 | |
663 | #define TAG_DISPLAY 4 | |
664 | #define TAG_THREADNAME 8 | |
c5aa993b | 665 | #define TAG_MOREDISPLAY 16 |
cce74817 | 666 | |
c906108c SS |
667 | #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES*2) |
668 | ||
cce74817 JM |
669 | char *unpack_varlen_hex PARAMS ((char *buff, int *result)); |
670 | ||
671 | static char *unpack_nibble PARAMS ((char *buf, int *val)); | |
672 | ||
673 | static char *pack_nibble PARAMS ((char *buf, int nibble)); | |
674 | ||
c5aa993b | 675 | static char *pack_hex_byte PARAMS ((char *pkt, int /*unsigned char */ byte)); |
cce74817 JM |
676 | |
677 | static char *unpack_byte PARAMS ((char *buf, int *value)); | |
678 | ||
679 | static char *pack_int PARAMS ((char *buf, int value)); | |
680 | ||
681 | static char *unpack_int PARAMS ((char *buf, int *value)); | |
682 | ||
683 | static char *unpack_string PARAMS ((char *src, char *dest, int length)); | |
684 | ||
c5aa993b | 685 | static char *pack_threadid PARAMS ((char *pkt, threadref * id)); |
cce74817 | 686 | |
c5aa993b | 687 | static char *unpack_threadid PARAMS ((char *inbuf, threadref * id)); |
cce74817 | 688 | |
c5aa993b | 689 | void int_to_threadref PARAMS ((threadref * id, int value)); |
cce74817 | 690 | |
c5aa993b | 691 | static int threadref_to_int PARAMS ((threadref * ref)); |
cce74817 | 692 | |
c5aa993b | 693 | static void copy_threadref PARAMS ((threadref * dest, threadref * src)); |
cce74817 | 694 | |
c5aa993b | 695 | static int threadmatch PARAMS ((threadref * dest, threadref * src)); |
cce74817 JM |
696 | |
697 | static char *pack_threadinfo_request PARAMS ((char *pkt, int mode, | |
c5aa993b | 698 | threadref * id)); |
cce74817 JM |
699 | |
700 | static int remote_unpack_thread_info_response PARAMS ((char *pkt, | |
c5aa993b JM |
701 | threadref * expectedref, |
702 | struct gdb_ext_thread_info * info)); | |
cce74817 JM |
703 | |
704 | ||
c5aa993b JM |
705 | static int remote_get_threadinfo PARAMS ((threadref * threadid, |
706 | int fieldset, /*TAG mask */ | |
707 | struct gdb_ext_thread_info * info)); | |
cce74817 | 708 | |
c5aa993b | 709 | static int adapt_remote_get_threadinfo PARAMS ((gdb_threadref * ref, |
cce74817 | 710 | int selection, |
c5aa993b | 711 | struct gdb_ext_thread_info * info)); |
cce74817 JM |
712 | |
713 | static char *pack_threadlist_request PARAMS ((char *pkt, int startflag, | |
714 | int threadcount, | |
c5aa993b | 715 | threadref * nextthread)); |
cce74817 JM |
716 | |
717 | static int parse_threadlist_response PARAMS ((char *pkt, | |
718 | int result_limit, | |
c5aa993b JM |
719 | threadref * original_echo, |
720 | threadref * resultlist, | |
cce74817 JM |
721 | int *doneflag)); |
722 | ||
723 | static int remote_get_threadlist PARAMS ((int startflag, | |
c5aa993b | 724 | threadref * nextthread, |
cce74817 JM |
725 | int result_limit, |
726 | int *done, | |
727 | int *result_count, | |
c5aa993b | 728 | threadref * threadlist)); |
cce74817 | 729 | |
c5aa993b | 730 | typedef int (*rmt_thread_action) (threadref * ref, void *context); |
cce74817 JM |
731 | |
732 | static int remote_threadlist_iterator PARAMS ((rmt_thread_action stepfunction, | |
c5aa993b | 733 | void *context, int looplimit)); |
cce74817 | 734 | |
c5aa993b | 735 | static int remote_newthread_step PARAMS ((threadref * ref, void *context)); |
cce74817 | 736 | |
c906108c SS |
737 | /* encode 64 bits in 16 chars of hex */ |
738 | ||
739 | static const char hexchars[] = "0123456789abcdef"; | |
740 | ||
741 | static int | |
742 | ishex (ch, val) | |
743 | int ch; | |
744 | int *val; | |
745 | { | |
746 | if ((ch >= 'a') && (ch <= 'f')) | |
747 | { | |
748 | *val = ch - 'a' + 10; | |
749 | return 1; | |
750 | } | |
751 | if ((ch >= 'A') && (ch <= 'F')) | |
752 | { | |
753 | *val = ch - 'A' + 10; | |
754 | return 1; | |
755 | } | |
756 | if ((ch >= '0') && (ch <= '9')) | |
757 | { | |
758 | *val = ch - '0'; | |
759 | return 1; | |
760 | } | |
761 | return 0; | |
762 | } | |
763 | ||
764 | static int | |
765 | stubhex (ch) | |
766 | int ch; | |
767 | { | |
768 | if (ch >= 'a' && ch <= 'f') | |
769 | return ch - 'a' + 10; | |
770 | if (ch >= '0' && ch <= '9') | |
771 | return ch - '0'; | |
772 | if (ch >= 'A' && ch <= 'F') | |
773 | return ch - 'A' + 10; | |
774 | return -1; | |
775 | } | |
776 | ||
777 | static int | |
778 | stub_unpack_int (buff, fieldlength) | |
779 | char *buff; | |
780 | int fieldlength; | |
781 | { | |
782 | int nibble; | |
783 | int retval = 0; | |
784 | ||
785 | while (fieldlength) | |
786 | { | |
787 | nibble = stubhex (*buff++); | |
788 | retval |= nibble; | |
789 | fieldlength--; | |
790 | if (fieldlength) | |
791 | retval = retval << 4; | |
792 | } | |
793 | return retval; | |
794 | } | |
795 | ||
796 | char * | |
797 | unpack_varlen_hex (buff, result) | |
798 | char *buff; /* packet to parse */ | |
799 | int *result; | |
800 | { | |
801 | int nibble; | |
802 | int retval = 0; | |
803 | ||
804 | while (ishex (*buff, &nibble)) | |
805 | { | |
806 | buff++; | |
807 | retval = retval << 4; | |
808 | retval |= nibble & 0x0f; | |
809 | } | |
810 | *result = retval; | |
811 | return buff; | |
812 | } | |
813 | ||
814 | static char * | |
815 | unpack_nibble (buf, val) | |
816 | char *buf; | |
817 | int *val; | |
818 | { | |
819 | ishex (*buf++, val); | |
820 | return buf; | |
821 | } | |
822 | ||
823 | static char * | |
824 | pack_nibble (buf, nibble) | |
825 | char *buf; | |
826 | int nibble; | |
827 | { | |
828 | *buf++ = hexchars[(nibble & 0x0f)]; | |
829 | return buf; | |
830 | } | |
831 | ||
832 | static char * | |
833 | pack_hex_byte (pkt, byte) | |
834 | char *pkt; | |
835 | int byte; | |
836 | { | |
837 | *pkt++ = hexchars[(byte >> 4) & 0xf]; | |
838 | *pkt++ = hexchars[(byte & 0xf)]; | |
839 | return pkt; | |
840 | } | |
841 | ||
842 | static char * | |
843 | unpack_byte (buf, value) | |
844 | char *buf; | |
845 | int *value; | |
846 | { | |
847 | *value = stub_unpack_int (buf, 2); | |
848 | return buf + 2; | |
849 | } | |
850 | ||
851 | static char * | |
852 | pack_int (buf, value) | |
853 | char *buf; | |
854 | int value; | |
855 | { | |
856 | buf = pack_hex_byte (buf, (value >> 24) & 0xff); | |
857 | buf = pack_hex_byte (buf, (value >> 16) & 0xff); | |
858 | buf = pack_hex_byte (buf, (value >> 8) & 0x0ff); | |
859 | buf = pack_hex_byte (buf, (value & 0xff)); | |
860 | return buf; | |
861 | } | |
862 | ||
863 | static char * | |
864 | unpack_int (buf, value) | |
865 | char *buf; | |
866 | int *value; | |
867 | { | |
868 | *value = stub_unpack_int (buf, 8); | |
869 | return buf + 8; | |
870 | } | |
871 | ||
c5aa993b | 872 | #if 0 /* currently unused, uncomment when needed */ |
c906108c SS |
873 | static char *pack_string PARAMS ((char *pkt, char *string)); |
874 | ||
875 | static char * | |
876 | pack_string (pkt, string) | |
877 | char *pkt; | |
878 | char *string; | |
879 | { | |
880 | char ch; | |
881 | int len; | |
882 | ||
883 | len = strlen (string); | |
884 | if (len > 200) | |
885 | len = 200; /* Bigger than most GDB packets, junk??? */ | |
886 | pkt = pack_hex_byte (pkt, len); | |
887 | while (len-- > 0) | |
888 | { | |
889 | ch = *string++; | |
890 | if ((ch == '\0') || (ch == '#')) | |
891 | ch = '*'; /* Protect encapsulation */ | |
892 | *pkt++ = ch; | |
893 | } | |
894 | return pkt; | |
895 | } | |
896 | #endif /* 0 (unused) */ | |
897 | ||
898 | static char * | |
899 | unpack_string (src, dest, length) | |
900 | char *src; | |
901 | char *dest; | |
902 | int length; | |
903 | { | |
904 | while (length--) | |
905 | *dest++ = *src++; | |
906 | *dest = '\0'; | |
907 | return src; | |
908 | } | |
909 | ||
910 | static char * | |
911 | pack_threadid (pkt, id) | |
912 | char *pkt; | |
913 | threadref *id; | |
914 | { | |
915 | char *limit; | |
916 | unsigned char *altid; | |
917 | ||
918 | altid = (unsigned char *) id; | |
919 | limit = pkt + BUF_THREAD_ID_SIZE; | |
920 | while (pkt < limit) | |
921 | pkt = pack_hex_byte (pkt, *altid++); | |
922 | return pkt; | |
923 | } | |
924 | ||
925 | ||
926 | static char * | |
927 | unpack_threadid (inbuf, id) | |
928 | char *inbuf; | |
929 | threadref *id; | |
930 | { | |
931 | char *altref; | |
932 | char *limit = inbuf + BUF_THREAD_ID_SIZE; | |
933 | int x, y; | |
934 | ||
935 | altref = (char *) id; | |
936 | ||
937 | while (inbuf < limit) | |
938 | { | |
939 | x = stubhex (*inbuf++); | |
940 | y = stubhex (*inbuf++); | |
941 | *altref++ = (x << 4) | y; | |
942 | } | |
943 | return inbuf; | |
944 | } | |
945 | ||
946 | /* Externally, threadrefs are 64 bits but internally, they are still | |
947 | ints. This is due to a mismatch of specifications. We would like | |
948 | to use 64bit thread references internally. This is an adapter | |
949 | function. */ | |
950 | ||
951 | void | |
952 | int_to_threadref (id, value) | |
953 | threadref *id; | |
954 | int value; | |
955 | { | |
956 | unsigned char *scan; | |
957 | ||
958 | scan = (unsigned char *) id; | |
959 | { | |
960 | int i = 4; | |
961 | while (i--) | |
962 | *scan++ = 0; | |
963 | } | |
964 | *scan++ = (value >> 24) & 0xff; | |
965 | *scan++ = (value >> 16) & 0xff; | |
966 | *scan++ = (value >> 8) & 0xff; | |
967 | *scan++ = (value & 0xff); | |
968 | } | |
969 | ||
970 | static int | |
971 | threadref_to_int (ref) | |
972 | threadref *ref; | |
973 | { | |
974 | int i, value = 0; | |
975 | unsigned char *scan; | |
976 | ||
977 | scan = (char *) ref; | |
978 | scan += 4; | |
979 | i = 4; | |
980 | while (i-- > 0) | |
981 | value = (value << 8) | ((*scan++) & 0xff); | |
982 | return value; | |
983 | } | |
984 | ||
985 | static void | |
986 | copy_threadref (dest, src) | |
987 | threadref *dest; | |
988 | threadref *src; | |
989 | { | |
990 | int i; | |
991 | unsigned char *csrc, *cdest; | |
992 | ||
993 | csrc = (unsigned char *) src; | |
994 | cdest = (unsigned char *) dest; | |
995 | i = 8; | |
996 | while (i--) | |
997 | *cdest++ = *csrc++; | |
998 | } | |
999 | ||
1000 | static int | |
1001 | threadmatch (dest, src) | |
1002 | threadref *dest; | |
1003 | threadref *src; | |
1004 | { | |
1005 | /* things are broken right now, so just assume we got a match */ | |
1006 | #if 0 | |
1007 | unsigned char *srcp, *destp; | |
1008 | int i, result; | |
1009 | srcp = (char *) src; | |
1010 | destp = (char *) dest; | |
1011 | ||
1012 | result = 1; | |
1013 | while (i-- > 0) | |
1014 | result &= (*srcp++ == *destp++) ? 1 : 0; | |
1015 | return result; | |
1016 | #endif | |
1017 | return 1; | |
1018 | } | |
1019 | ||
1020 | /* | |
c5aa993b JM |
1021 | threadid:1, # always request threadid |
1022 | context_exists:2, | |
1023 | display:4, | |
1024 | unique_name:8, | |
1025 | more_display:16 | |
1026 | */ | |
c906108c SS |
1027 | |
1028 | /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */ | |
1029 | ||
1030 | static char * | |
1031 | pack_threadinfo_request (pkt, mode, id) | |
1032 | char *pkt; | |
1033 | int mode; | |
1034 | threadref *id; | |
1035 | { | |
1036 | *pkt++ = 'q'; /* Info Query */ | |
1037 | *pkt++ = 'P'; /* process or thread info */ | |
1038 | pkt = pack_int (pkt, mode); /* mode */ | |
1039 | pkt = pack_threadid (pkt, id); /* threadid */ | |
1040 | *pkt = '\0'; /* terminate */ | |
1041 | return pkt; | |
1042 | } | |
1043 | ||
1044 | /* These values tag the fields in a thread info response packet */ | |
1045 | /* Tagging the fields allows us to request specific fields and to | |
1046 | add more fields as time goes by */ | |
1047 | ||
c5aa993b JM |
1048 | #define TAG_THREADID 1 /* Echo the thread identifier */ |
1049 | #define TAG_EXISTS 2 /* Is this process defined enough to | |
1050 | fetch registers and its stack */ | |
1051 | #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */ | |
1052 | #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is */ | |
1053 | #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about | |
1054 | the process */ | |
c906108c SS |
1055 | |
1056 | static int | |
1057 | remote_unpack_thread_info_response (pkt, expectedref, info) | |
1058 | char *pkt; | |
1059 | threadref *expectedref; | |
1060 | struct gdb_ext_thread_info *info; | |
1061 | { | |
1062 | int mask, length; | |
1063 | unsigned int tag; | |
1064 | threadref ref; | |
c5aa993b | 1065 | char *limit = pkt + PBUFSIZ; /* plausable parsing limit */ |
c906108c SS |
1066 | int retval = 1; |
1067 | ||
1068 | /* info->threadid = 0; FIXME: implement zero_threadref */ | |
1069 | info->active = 0; | |
1070 | info->display[0] = '\0'; | |
1071 | info->shortname[0] = '\0'; | |
1072 | info->more_display[0] = '\0'; | |
1073 | ||
1074 | /* Assume the characters indicating the packet type have been stripped */ | |
1075 | pkt = unpack_int (pkt, &mask); /* arg mask */ | |
1076 | pkt = unpack_threadid (pkt, &ref); | |
1077 | ||
1078 | if (mask == 0) | |
1079 | warning ("Incomplete response to threadinfo request\n"); | |
1080 | if (!threadmatch (&ref, expectedref)) | |
1081 | { /* This is an answer to a different request */ | |
1082 | warning ("ERROR RMT Thread info mismatch\n"); | |
1083 | return 0; | |
1084 | } | |
1085 | copy_threadref (&info->threadid, &ref); | |
1086 | ||
1087 | /* Loop on tagged fields , try to bail if somthing goes wrong */ | |
1088 | ||
c5aa993b | 1089 | while ((pkt < limit) && mask && *pkt) /* packets are terminated with nulls */ |
c906108c SS |
1090 | { |
1091 | pkt = unpack_int (pkt, &tag); /* tag */ | |
1092 | pkt = unpack_byte (pkt, &length); /* length */ | |
1093 | if (!(tag & mask)) /* tags out of synch with mask */ | |
1094 | { | |
1095 | warning ("ERROR RMT: threadinfo tag mismatch\n"); | |
1096 | retval = 0; | |
1097 | break; | |
1098 | } | |
1099 | if (tag == TAG_THREADID) | |
1100 | { | |
1101 | if (length != 16) | |
1102 | { | |
1103 | warning ("ERROR RMT: length of threadid is not 16\n"); | |
1104 | retval = 0; | |
1105 | break; | |
1106 | } | |
1107 | pkt = unpack_threadid (pkt, &ref); | |
1108 | mask = mask & ~TAG_THREADID; | |
1109 | continue; | |
1110 | } | |
1111 | if (tag == TAG_EXISTS) | |
1112 | { | |
1113 | info->active = stub_unpack_int (pkt, length); | |
1114 | pkt += length; | |
1115 | mask = mask & ~(TAG_EXISTS); | |
1116 | if (length > 8) | |
1117 | { | |
1118 | warning ("ERROR RMT: 'exists' length too long\n"); | |
1119 | retval = 0; | |
1120 | break; | |
1121 | } | |
1122 | continue; | |
1123 | } | |
1124 | if (tag == TAG_THREADNAME) | |
1125 | { | |
1126 | pkt = unpack_string (pkt, &info->shortname[0], length); | |
1127 | mask = mask & ~TAG_THREADNAME; | |
1128 | continue; | |
1129 | } | |
1130 | if (tag == TAG_DISPLAY) | |
1131 | { | |
1132 | pkt = unpack_string (pkt, &info->display[0], length); | |
1133 | mask = mask & ~TAG_DISPLAY; | |
1134 | continue; | |
1135 | } | |
1136 | if (tag == TAG_MOREDISPLAY) | |
1137 | { | |
1138 | pkt = unpack_string (pkt, &info->more_display[0], length); | |
1139 | mask = mask & ~TAG_MOREDISPLAY; | |
1140 | continue; | |
1141 | } | |
1142 | warning ("ERROR RMT: unknown thread info tag\n"); | |
1143 | break; /* Not a tag we know about */ | |
1144 | } | |
1145 | return retval; | |
1146 | } | |
1147 | ||
1148 | static int | |
1149 | remote_get_threadinfo (threadid, fieldset, info) | |
1150 | threadref *threadid; | |
1151 | int fieldset; /* TAG mask */ | |
1152 | struct gdb_ext_thread_info *info; | |
1153 | { | |
1154 | int result; | |
085dd6e6 | 1155 | char *threadinfo_pkt = alloca (PBUFSIZ); |
c906108c SS |
1156 | |
1157 | pack_threadinfo_request (threadinfo_pkt, fieldset, threadid); | |
1158 | putpkt (threadinfo_pkt); | |
1159 | getpkt (threadinfo_pkt, 0); | |
1160 | result = remote_unpack_thread_info_response (threadinfo_pkt + 2, threadid, | |
1161 | info); | |
1162 | return result; | |
1163 | } | |
1164 | ||
1165 | /* Unfortunately, 61 bit thread-ids are bigger than the internal | |
1166 | representation of a threadid. */ | |
1167 | ||
1168 | static int | |
1169 | adapt_remote_get_threadinfo (ref, selection, info) | |
1170 | gdb_threadref *ref; | |
1171 | int selection; | |
1172 | struct gdb_ext_thread_info *info; | |
1173 | { | |
1174 | threadref lclref; | |
1175 | ||
1176 | int_to_threadref (&lclref, *ref); | |
1177 | return remote_get_threadinfo (&lclref, selection, info); | |
1178 | } | |
1179 | ||
1180 | /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */ | |
1181 | ||
1182 | static char * | |
1183 | pack_threadlist_request (pkt, startflag, threadcount, nextthread) | |
1184 | char *pkt; | |
1185 | int startflag; | |
1186 | int threadcount; | |
1187 | threadref *nextthread; | |
1188 | { | |
1189 | *pkt++ = 'q'; /* info query packet */ | |
1190 | *pkt++ = 'L'; /* Process LIST or threadLIST request */ | |
1191 | pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */ | |
1192 | pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */ | |
1193 | pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */ | |
1194 | *pkt = '\0'; | |
1195 | return pkt; | |
1196 | } | |
1197 | ||
1198 | /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */ | |
1199 | ||
1200 | static int | |
1201 | parse_threadlist_response (pkt, result_limit, original_echo, resultlist, | |
1202 | doneflag) | |
1203 | char *pkt; | |
1204 | int result_limit; | |
1205 | threadref *original_echo; | |
1206 | threadref *resultlist; | |
1207 | int *doneflag; | |
1208 | { | |
1209 | char *limit; | |
1210 | int count, resultcount, done; | |
1211 | ||
1212 | resultcount = 0; | |
1213 | /* Assume the 'q' and 'M chars have been stripped. */ | |
c5aa993b | 1214 | limit = pkt + (PBUFSIZ - BUF_THREAD_ID_SIZE); /* done parse past here */ |
c906108c SS |
1215 | pkt = unpack_byte (pkt, &count); /* count field */ |
1216 | pkt = unpack_nibble (pkt, &done); | |
1217 | /* The first threadid is the argument threadid. */ | |
1218 | pkt = unpack_threadid (pkt, original_echo); /* should match query packet */ | |
1219 | while ((count-- > 0) && (pkt < limit)) | |
1220 | { | |
1221 | pkt = unpack_threadid (pkt, resultlist++); | |
1222 | if (resultcount++ >= result_limit) | |
1223 | break; | |
1224 | } | |
1225 | if (doneflag) | |
1226 | *doneflag = done; | |
1227 | return resultcount; | |
1228 | } | |
1229 | ||
1230 | static int | |
1231 | remote_get_threadlist (startflag, nextthread, result_limit, | |
1232 | done, result_count, threadlist) | |
1233 | int startflag; | |
1234 | threadref *nextthread; | |
1235 | int result_limit; | |
1236 | int *done; | |
1237 | int *result_count; | |
1238 | threadref *threadlist; | |
1239 | ||
1240 | { | |
1241 | static threadref echo_nextthread; | |
085dd6e6 JM |
1242 | char *threadlist_packet = alloca (PBUFSIZ); |
1243 | char *t_response = alloca (PBUFSIZ); | |
c906108c SS |
1244 | int result = 1; |
1245 | ||
1246 | /* Trancate result limit to be smaller than the packet size */ | |
1247 | if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= PBUFSIZ) | |
1248 | result_limit = (PBUFSIZ / BUF_THREAD_ID_SIZE) - 2; | |
1249 | ||
1250 | pack_threadlist_request (threadlist_packet, | |
1251 | startflag, result_limit, nextthread); | |
1252 | putpkt (threadlist_packet); | |
1253 | getpkt (t_response, 0); | |
1254 | ||
1255 | *result_count = | |
1256 | parse_threadlist_response (t_response + 2, result_limit, &echo_nextthread, | |
1257 | threadlist, done); | |
1258 | ||
1259 | if (!threadmatch (&echo_nextthread, nextthread)) | |
1260 | { | |
1261 | /* FIXME: This is a good reason to drop the packet */ | |
1262 | /* Possably, there is a duplicate response */ | |
1263 | /* Possabilities : | |
1264 | retransmit immediatly - race conditions | |
1265 | retransmit after timeout - yes | |
1266 | exit | |
1267 | wait for packet, then exit | |
1268 | */ | |
1269 | warning ("HMM: threadlist did not echo arg thread, dropping it\n"); | |
1270 | return 0; /* I choose simply exiting */ | |
1271 | } | |
1272 | if (*result_count <= 0) | |
1273 | { | |
1274 | if (*done != 1) | |
1275 | { | |
1276 | warning ("RMT ERROR : failed to get remote thread list\n"); | |
1277 | result = 0; | |
1278 | } | |
1279 | return result; /* break; */ | |
1280 | } | |
1281 | if (*result_count > result_limit) | |
1282 | { | |
1283 | *result_count = 0; | |
1284 | warning ("RMT ERROR: threadlist response longer than requested\n"); | |
1285 | return 0; | |
1286 | } | |
1287 | return result; | |
1288 | } | |
1289 | ||
1290 | /* This is the interface between remote and threads, remotes upper interface */ | |
1291 | ||
1292 | /* remote_find_new_threads retrieves the thread list and for each | |
1293 | thread in the list, looks up the thread in GDB's internal list, | |
1294 | ading the thread if it does not already exist. This involves | |
1295 | getting partial thread lists from the remote target so, polling the | |
1296 | quit_flag is required. */ | |
1297 | ||
1298 | ||
1299 | /* About this many threadisds fit in a packet. */ | |
1300 | ||
1301 | #define MAXTHREADLISTRESULTS 32 | |
1302 | ||
1303 | static int | |
1304 | remote_threadlist_iterator (stepfunction, context, looplimit) | |
1305 | rmt_thread_action stepfunction; | |
1306 | void *context; | |
1307 | int looplimit; | |
1308 | { | |
1309 | int done, i, result_count; | |
1310 | int startflag = 1; | |
1311 | int result = 1; | |
1312 | int loopcount = 0; | |
1313 | static threadref nextthread; | |
1314 | static threadref resultthreadlist[MAXTHREADLISTRESULTS]; | |
1315 | ||
1316 | done = 0; | |
1317 | while (!done) | |
1318 | { | |
1319 | if (loopcount++ > looplimit) | |
1320 | { | |
1321 | result = 0; | |
1322 | warning ("Remote fetch threadlist -infinite loop-\n"); | |
1323 | break; | |
1324 | } | |
1325 | if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS, | |
1326 | &done, &result_count, resultthreadlist)) | |
1327 | { | |
1328 | result = 0; | |
1329 | break; | |
1330 | } | |
1331 | /* clear for later iterations */ | |
1332 | startflag = 0; | |
1333 | /* Setup to resume next batch of thread references, set nextthread. */ | |
1334 | if (result_count >= 1) | |
1335 | copy_threadref (&nextthread, &resultthreadlist[result_count - 1]); | |
1336 | i = 0; | |
1337 | while (result_count--) | |
1338 | if (!(result = (*stepfunction) (&resultthreadlist[i++], context))) | |
1339 | break; | |
1340 | } | |
1341 | return result; | |
1342 | } | |
1343 | ||
1344 | static int | |
1345 | remote_newthread_step (ref, context) | |
1346 | threadref *ref; | |
1347 | void *context; | |
1348 | { | |
1349 | int pid; | |
1350 | ||
1351 | pid = threadref_to_int (ref); | |
1352 | if (!in_thread_list (pid)) | |
1353 | add_thread (pid); | |
1354 | return 1; /* continue iterator */ | |
1355 | } | |
1356 | ||
1357 | #define CRAZY_MAX_THREADS 1000 | |
1358 | ||
1359 | static int | |
1360 | remote_current_thread (oldpid) | |
1361 | int oldpid; | |
1362 | { | |
085dd6e6 | 1363 | char *buf = alloca (PBUFSIZ); |
c906108c SS |
1364 | |
1365 | putpkt ("qC"); | |
1366 | getpkt (buf, 0); | |
1367 | if (buf[0] == 'Q' && buf[1] == 'C') | |
1368 | return strtol (&buf[2], NULL, 16); | |
1369 | else | |
1370 | return oldpid; | |
1371 | } | |
1372 | ||
cce74817 JM |
1373 | /* Find new threads for info threads command. */ |
1374 | ||
1375 | static void | |
c906108c SS |
1376 | remote_find_new_threads () |
1377 | { | |
c5aa993b JM |
1378 | remote_threadlist_iterator (remote_newthread_step, 0, |
1379 | CRAZY_MAX_THREADS); | |
c906108c SS |
1380 | if (inferior_pid == MAGIC_NULL_PID) /* ack ack ack */ |
1381 | inferior_pid = remote_current_thread (inferior_pid); | |
c906108c SS |
1382 | } |
1383 | ||
0f71a2f6 JM |
1384 | static void |
1385 | remote_threads_info (void) | |
1386 | { | |
085dd6e6 JM |
1387 | char *buf = alloca (PBUFSIZ); |
1388 | char *bufp; | |
0f71a2f6 JM |
1389 | int tid; |
1390 | ||
1391 | if (remote_desc == 0) /* paranoia */ | |
1392 | error ("Command can only be used when connected to the remote target."); | |
1393 | ||
1394 | putpkt ("qfThreadInfo"); | |
1395 | getpkt (bufp = buf, 0); | |
1396 | if (bufp[0] == '\0') /* q packet not recognized! */ | |
1397 | { /* try old jmetzler method */ | |
1398 | remote_find_new_threads (); | |
1399 | return; | |
1400 | } | |
1401 | else /* try new 'q' method */ | |
c5aa993b | 1402 | while (*bufp++ == 'm') /* reply contains one or more TID */ |
0f71a2f6 | 1403 | { |
c5aa993b JM |
1404 | do |
1405 | { | |
1406 | tid = strtol (bufp, &bufp, 16); | |
1407 | if (tid != 0 && !in_thread_list (tid)) | |
1408 | add_thread (tid); | |
1409 | } | |
1410 | while (*bufp++ == ','); /* comma-separated list */ | |
0f71a2f6 JM |
1411 | putpkt ("qsThreadInfo"); |
1412 | getpkt (bufp = buf, 0); | |
1413 | } | |
1414 | } | |
c906108c | 1415 | \f |
c5aa993b | 1416 | |
c906108c SS |
1417 | /* Restart the remote side; this is an extended protocol operation. */ |
1418 | ||
1419 | static void | |
1420 | extended_remote_restart () | |
1421 | { | |
085dd6e6 | 1422 | char *buf = alloca (PBUFSIZ); |
c906108c SS |
1423 | |
1424 | /* Send the restart command; for reasons I don't understand the | |
1425 | remote side really expects a number after the "R". */ | |
1426 | buf[0] = 'R'; | |
1427 | sprintf (&buf[1], "%x", 0); | |
1428 | putpkt (buf); | |
1429 | ||
1430 | /* Now query for status so this looks just like we restarted | |
1431 | gdbserver from scratch. */ | |
1432 | putpkt ("?"); | |
1433 | getpkt (buf, 0); | |
1434 | } | |
1435 | \f | |
1436 | /* Clean up connection to a remote debugger. */ | |
1437 | ||
1438 | /* ARGSUSED */ | |
1439 | static void | |
1440 | remote_close (quitting) | |
1441 | int quitting; | |
1442 | { | |
1443 | if (remote_desc) | |
1444 | SERIAL_CLOSE (remote_desc); | |
1445 | remote_desc = NULL; | |
1446 | } | |
1447 | ||
1448 | /* Query the remote side for the text, data and bss offsets. */ | |
1449 | ||
1450 | static void | |
1451 | get_offsets () | |
1452 | { | |
085dd6e6 JM |
1453 | char *buf = alloca (PBUFSIZ); |
1454 | char *ptr; | |
c906108c SS |
1455 | int lose; |
1456 | CORE_ADDR text_addr, data_addr, bss_addr; | |
1457 | struct section_offsets *offs; | |
1458 | ||
1459 | putpkt ("qOffsets"); | |
1460 | ||
1461 | getpkt (buf, 0); | |
1462 | ||
1463 | if (buf[0] == '\000') | |
1464 | return; /* Return silently. Stub doesn't support | |
1465 | this command. */ | |
1466 | if (buf[0] == 'E') | |
1467 | { | |
1468 | warning ("Remote failure reply: %s", buf); | |
1469 | return; | |
1470 | } | |
1471 | ||
1472 | /* Pick up each field in turn. This used to be done with scanf, but | |
1473 | scanf will make trouble if CORE_ADDR size doesn't match | |
1474 | conversion directives correctly. The following code will work | |
1475 | with any size of CORE_ADDR. */ | |
1476 | text_addr = data_addr = bss_addr = 0; | |
1477 | ptr = buf; | |
1478 | lose = 0; | |
1479 | ||
1480 | if (strncmp (ptr, "Text=", 5) == 0) | |
1481 | { | |
1482 | ptr += 5; | |
1483 | /* Don't use strtol, could lose on big values. */ | |
1484 | while (*ptr && *ptr != ';') | |
1485 | text_addr = (text_addr << 4) + fromhex (*ptr++); | |
1486 | } | |
1487 | else | |
1488 | lose = 1; | |
1489 | ||
1490 | if (!lose && strncmp (ptr, ";Data=", 6) == 0) | |
1491 | { | |
1492 | ptr += 6; | |
1493 | while (*ptr && *ptr != ';') | |
1494 | data_addr = (data_addr << 4) + fromhex (*ptr++); | |
1495 | } | |
1496 | else | |
1497 | lose = 1; | |
1498 | ||
1499 | if (!lose && strncmp (ptr, ";Bss=", 5) == 0) | |
1500 | { | |
1501 | ptr += 5; | |
1502 | while (*ptr && *ptr != ';') | |
1503 | bss_addr = (bss_addr << 4) + fromhex (*ptr++); | |
1504 | } | |
1505 | else | |
1506 | lose = 1; | |
1507 | ||
1508 | if (lose) | |
1509 | error ("Malformed response to offset query, %s", buf); | |
1510 | ||
1511 | if (symfile_objfile == NULL) | |
1512 | return; | |
1513 | ||
d4f3574e SS |
1514 | offs = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS); |
1515 | memcpy (offs, symfile_objfile->section_offsets, SIZEOF_SECTION_OFFSETS); | |
c906108c SS |
1516 | |
1517 | ANOFFSET (offs, SECT_OFF_TEXT) = text_addr; | |
1518 | ||
1519 | /* This is a temporary kludge to force data and bss to use the same offsets | |
1520 | because that's what nlmconv does now. The real solution requires changes | |
1521 | to the stub and remote.c that I don't have time to do right now. */ | |
1522 | ||
1523 | ANOFFSET (offs, SECT_OFF_DATA) = data_addr; | |
1524 | ANOFFSET (offs, SECT_OFF_BSS) = data_addr; | |
1525 | ||
1526 | objfile_relocate (symfile_objfile, offs); | |
1527 | } | |
1528 | ||
0f71a2f6 JM |
1529 | /* |
1530 | * Cisco version of section offsets: | |
1531 | * | |
1532 | * Instead of having GDB query the target for the section offsets, | |
1533 | * Cisco lets the target volunteer the information! It's also in | |
1534 | * a different format, so here are the functions that will decode | |
1535 | * a section offset packet from a Cisco target. | |
1536 | */ | |
1537 | ||
1538 | /* | |
1539 | * Function: remote_cisco_section_offsets | |
1540 | * | |
1541 | * Returns: zero for success, non-zero for failure | |
1542 | */ | |
1543 | ||
c5aa993b JM |
1544 | static int |
1545 | remote_cisco_section_offsets (text_addr, data_addr, bss_addr, | |
0f71a2f6 JM |
1546 | text_offs, data_offs, bss_offs) |
1547 | bfd_vma text_addr; | |
1548 | bfd_vma data_addr; | |
1549 | bfd_vma bss_addr; | |
c5aa993b JM |
1550 | bfd_signed_vma *text_offs; |
1551 | bfd_signed_vma *data_offs; | |
1552 | bfd_signed_vma *bss_offs; | |
0f71a2f6 JM |
1553 | { |
1554 | bfd_vma text_base, data_base, bss_base; | |
1555 | struct minimal_symbol *start; | |
1556 | asection *sect; | |
c5aa993b | 1557 | bfd *abfd; |
0f71a2f6 JM |
1558 | int len; |
1559 | char *p; | |
1560 | ||
1561 | if (symfile_objfile == NULL) | |
c5aa993b | 1562 | return -1; /* no can do nothin' */ |
0f71a2f6 JM |
1563 | |
1564 | start = lookup_minimal_symbol ("_start", NULL, NULL); | |
1565 | if (start == NULL) | |
c5aa993b | 1566 | return -1; /* Can't find "_start" symbol */ |
0f71a2f6 JM |
1567 | |
1568 | data_base = bss_base = 0; | |
1569 | text_base = SYMBOL_VALUE_ADDRESS (start); | |
1570 | ||
1571 | abfd = symfile_objfile->obfd; | |
c5aa993b | 1572 | for (sect = abfd->sections; |
0f71a2f6 JM |
1573 | sect != 0; |
1574 | sect = sect->next) | |
1575 | { | |
c5aa993b | 1576 | p = (unsigned char *) bfd_get_section_name (abfd, sect); |
0f71a2f6 JM |
1577 | len = strlen (p); |
1578 | if (strcmp (p + len - 4, "data") == 0) /* ends in "data" */ | |
1579 | if (data_base == 0 || | |
1580 | data_base > bfd_get_section_vma (abfd, sect)) | |
1581 | data_base = bfd_get_section_vma (abfd, sect); | |
1582 | if (strcmp (p + len - 3, "bss") == 0) /* ends in "bss" */ | |
c5aa993b | 1583 | if (bss_base == 0 || |
0f71a2f6 JM |
1584 | bss_base > bfd_get_section_vma (abfd, sect)) |
1585 | bss_base = bfd_get_section_vma (abfd, sect); | |
1586 | } | |
1587 | *text_offs = text_addr - text_base; | |
1588 | *data_offs = data_addr - data_base; | |
c5aa993b | 1589 | *bss_offs = bss_addr - bss_base; |
0f71a2f6 JM |
1590 | if (remote_debug) |
1591 | { | |
1592 | char tmp[128]; | |
1593 | ||
1594 | sprintf (tmp, "VMA: text = 0x"); | |
1595 | sprintf_vma (tmp + strlen (tmp), text_addr); | |
c5aa993b | 1596 | sprintf (tmp + strlen (tmp), " data = 0x"); |
0f71a2f6 | 1597 | sprintf_vma (tmp + strlen (tmp), data_addr); |
c5aa993b | 1598 | sprintf (tmp + strlen (tmp), " bss = 0x"); |
0f71a2f6 JM |
1599 | sprintf_vma (tmp + strlen (tmp), bss_addr); |
1600 | fprintf_filtered (gdb_stdlog, tmp); | |
1601 | fprintf_filtered (gdb_stdlog, | |
d4f3574e SS |
1602 | "Reloc offset: text = 0x%s data = 0x%s bss = 0x%s\n", |
1603 | paddr_nz (*text_offs), | |
1604 | paddr_nz (*data_offs), | |
1605 | paddr_nz (*bss_offs)); | |
0f71a2f6 JM |
1606 | } |
1607 | ||
1608 | return 0; | |
1609 | } | |
1610 | ||
1611 | /* | |
1612 | * Function: remote_cisco_objfile_relocate | |
1613 | * | |
1614 | * Relocate the symbol file for a remote target. | |
1615 | */ | |
1616 | ||
96baa820 | 1617 | void |
0f71a2f6 JM |
1618 | remote_cisco_objfile_relocate (text_off, data_off, bss_off) |
1619 | bfd_signed_vma text_off; | |
1620 | bfd_signed_vma data_off; | |
1621 | bfd_signed_vma bss_off; | |
1622 | { | |
1623 | struct section_offsets *offs; | |
1624 | ||
c5aa993b | 1625 | if (text_off != 0 || data_off != 0 || bss_off != 0) |
0f71a2f6 JM |
1626 | { |
1627 | /* FIXME: This code assumes gdb-stabs.h is being used; it's | |
c5aa993b JM |
1628 | broken for xcoff, dwarf, sdb-coff, etc. But there is no |
1629 | simple canonical representation for this stuff. */ | |
0f71a2f6 | 1630 | |
d4f3574e SS |
1631 | offs = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS); |
1632 | memcpy (offs, symfile_objfile->section_offsets, SIZEOF_SECTION_OFFSETS); | |
0f71a2f6 JM |
1633 | |
1634 | ANOFFSET (offs, SECT_OFF_TEXT) = text_off; | |
1635 | ANOFFSET (offs, SECT_OFF_DATA) = data_off; | |
c5aa993b | 1636 | ANOFFSET (offs, SECT_OFF_BSS) = bss_off; |
0f71a2f6 JM |
1637 | |
1638 | /* First call the standard objfile_relocate. */ | |
1639 | objfile_relocate (symfile_objfile, offs); | |
1640 | ||
1641 | /* Now we need to fix up the section entries already attached to | |
c5aa993b JM |
1642 | the exec target. These entries will control memory transfers |
1643 | from the exec file. */ | |
0f71a2f6 JM |
1644 | |
1645 | exec_set_section_offsets (text_off, data_off, bss_off); | |
1646 | } | |
1647 | } | |
1648 | ||
c906108c SS |
1649 | /* Stub for catch_errors. */ |
1650 | ||
0f71a2f6 JM |
1651 | static int |
1652 | remote_start_remote_dummy (dummy) | |
1653 | char *dummy; | |
1654 | { | |
1655 | start_remote (); /* Initialize gdb process mechanisms */ | |
1656 | return 1; | |
1657 | } | |
1658 | ||
c906108c SS |
1659 | static int |
1660 | remote_start_remote (dummy) | |
1661 | PTR dummy; | |
1662 | { | |
1663 | immediate_quit = 1; /* Allow user to interrupt it */ | |
1664 | ||
1665 | /* Ack any packet which the remote side has already sent. */ | |
1666 | SERIAL_WRITE (remote_desc, "+", 1); | |
1667 | ||
1668 | /* Let the stub know that we want it to return the thread. */ | |
1669 | set_thread (-1, 0); | |
1670 | ||
1671 | inferior_pid = remote_current_thread (inferior_pid); | |
1672 | ||
1673 | get_offsets (); /* Get text, data & bss offsets */ | |
1674 | ||
1675 | putpkt ("?"); /* initiate a query from remote machine */ | |
1676 | immediate_quit = 0; | |
1677 | ||
0f71a2f6 | 1678 | return remote_start_remote_dummy (dummy); |
c906108c SS |
1679 | } |
1680 | ||
1681 | /* Open a connection to a remote debugger. | |
1682 | NAME is the filename used for communication. */ | |
1683 | ||
1684 | static void | |
1685 | remote_open (name, from_tty) | |
1686 | char *name; | |
1687 | int from_tty; | |
1688 | { | |
1689 | remote_open_1 (name, from_tty, &remote_ops, 0); | |
1690 | } | |
1691 | ||
43ff13b4 JM |
1692 | /* Just like remote_open, but with asynchronous support. */ |
1693 | static void | |
1694 | remote_async_open (name, from_tty) | |
1695 | char *name; | |
1696 | int from_tty; | |
1697 | { | |
1698 | remote_async_open_1 (name, from_tty, &remote_async_ops, 0); | |
1699 | } | |
1700 | ||
c906108c SS |
1701 | /* Open a connection to a remote debugger using the extended |
1702 | remote gdb protocol. NAME is the filename used for communication. */ | |
1703 | ||
1704 | static void | |
1705 | extended_remote_open (name, from_tty) | |
1706 | char *name; | |
1707 | int from_tty; | |
1708 | { | |
c5aa993b | 1709 | remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */ ); |
c906108c SS |
1710 | } |
1711 | ||
43ff13b4 JM |
1712 | /* Just like extended_remote_open, but with asynchronous support. */ |
1713 | static void | |
1714 | extended_remote_async_open (name, from_tty) | |
1715 | char *name; | |
1716 | int from_tty; | |
1717 | { | |
c5aa993b | 1718 | remote_async_open_1 (name, from_tty, &extended_async_remote_ops, 1 /*extended_p */ ); |
43ff13b4 JM |
1719 | } |
1720 | ||
c906108c SS |
1721 | /* Generic code for opening a connection to a remote target. */ |
1722 | ||
1723 | static DCACHE *remote_dcache; | |
1724 | ||
1725 | static void | |
1726 | remote_open_1 (name, from_tty, target, extended_p) | |
1727 | char *name; | |
1728 | int from_tty; | |
1729 | struct target_ops *target; | |
1730 | int extended_p; | |
1731 | { | |
1732 | if (name == 0) | |
1733 | error ("To open a remote debug connection, you need to specify what\n\ | |
1734 | serial device is attached to the remote system (e.g. /dev/ttya)."); | |
1735 | ||
6426a772 JM |
1736 | /* See FIXME above */ |
1737 | wait_forever_enabled_p = 1; | |
1738 | ||
c906108c SS |
1739 | target_preopen (from_tty); |
1740 | ||
1741 | unpush_target (target); | |
1742 | ||
1743 | remote_dcache = dcache_init (remote_read_bytes, remote_write_bytes); | |
1744 | ||
1745 | remote_desc = SERIAL_OPEN (name); | |
1746 | if (!remote_desc) | |
1747 | perror_with_name (name); | |
1748 | ||
1749 | if (baud_rate != -1) | |
1750 | { | |
1751 | if (SERIAL_SETBAUDRATE (remote_desc, baud_rate)) | |
1752 | { | |
1753 | SERIAL_CLOSE (remote_desc); | |
1754 | perror_with_name (name); | |
1755 | } | |
1756 | } | |
1757 | ||
c906108c SS |
1758 | SERIAL_RAW (remote_desc); |
1759 | ||
1760 | /* If there is something sitting in the buffer we might take it as a | |
1761 | response to a command, which would be bad. */ | |
1762 | SERIAL_FLUSH_INPUT (remote_desc); | |
1763 | ||
1764 | if (from_tty) | |
1765 | { | |
1766 | puts_filtered ("Remote debugging using "); | |
1767 | puts_filtered (name); | |
1768 | puts_filtered ("\n"); | |
1769 | } | |
c5aa993b | 1770 | push_target (target); /* Switch to using remote target now */ |
c906108c | 1771 | |
5a2468f5 | 1772 | init_packet_config (&remote_protocol_P); |
96baa820 JM |
1773 | init_packet_config (&remote_protocol_Z); |
1774 | ||
c5aa993b | 1775 | general_thread = -2; |
cce74817 | 1776 | continue_thread = -2; |
c906108c SS |
1777 | |
1778 | /* Force remote_write_bytes to check whether target supports | |
1779 | binary downloading. */ | |
96baa820 | 1780 | init_packet_config (&remote_protocol_binary_download); |
c906108c SS |
1781 | |
1782 | /* Without this, some commands which require an active target (such | |
1783 | as kill) won't work. This variable serves (at least) double duty | |
1784 | as both the pid of the target process (if it has such), and as a | |
1785 | flag indicating that a target is active. These functions should | |
1786 | be split out into seperate variables, especially since GDB will | |
1787 | someday have a notion of debugging several processes. */ | |
1788 | ||
1789 | inferior_pid = MAGIC_NULL_PID; | |
1790 | /* Start the remote connection; if error (0), discard this target. | |
1791 | In particular, if the user quits, be sure to discard it | |
1792 | (we'd be in an inconsistent state otherwise). */ | |
c5aa993b JM |
1793 | if (!catch_errors (remote_start_remote, NULL, |
1794 | "Couldn't establish connection to remote target\n", | |
c906108c SS |
1795 | RETURN_MASK_ALL)) |
1796 | { | |
1797 | pop_target (); | |
1798 | return; | |
1799 | } | |
1800 | ||
1801 | if (extended_p) | |
1802 | { | |
1803 | /* tell the remote that we're using the extended protocol. */ | |
085dd6e6 | 1804 | char *buf = alloca (PBUFSIZ); |
c906108c SS |
1805 | putpkt ("!"); |
1806 | getpkt (buf, 0); | |
1807 | } | |
1808 | } | |
1809 | ||
43ff13b4 JM |
1810 | /* Just like remote_open but with asynchronous support. */ |
1811 | static void | |
1812 | remote_async_open_1 (name, from_tty, target, extended_p) | |
1813 | char *name; | |
1814 | int from_tty; | |
1815 | struct target_ops *target; | |
1816 | int extended_p; | |
1817 | { | |
1818 | if (name == 0) | |
1819 | error ("To open a remote debug connection, you need to specify what\n\ | |
1820 | serial device is attached to the remote system (e.g. /dev/ttya)."); | |
1821 | ||
1822 | target_preopen (from_tty); | |
1823 | ||
1824 | unpush_target (target); | |
1825 | ||
1826 | remote_dcache = dcache_init (remote_read_bytes, remote_write_bytes); | |
1827 | ||
1828 | remote_desc = SERIAL_OPEN (name); | |
1829 | if (!remote_desc) | |
1830 | perror_with_name (name); | |
1831 | ||
1832 | if (baud_rate != -1) | |
1833 | { | |
1834 | if (SERIAL_SETBAUDRATE (remote_desc, baud_rate)) | |
1835 | { | |
1836 | SERIAL_CLOSE (remote_desc); | |
1837 | perror_with_name (name); | |
1838 | } | |
1839 | } | |
1840 | ||
1841 | SERIAL_RAW (remote_desc); | |
1842 | ||
1843 | /* If there is something sitting in the buffer we might take it as a | |
1844 | response to a command, which would be bad. */ | |
1845 | SERIAL_FLUSH_INPUT (remote_desc); | |
1846 | ||
1847 | if (from_tty) | |
1848 | { | |
1849 | puts_filtered ("Remote debugging using "); | |
1850 | puts_filtered (name); | |
1851 | puts_filtered ("\n"); | |
1852 | } | |
1853 | ||
c5aa993b | 1854 | push_target (target); /* Switch to using remote target now */ |
43ff13b4 | 1855 | |
5a2468f5 | 1856 | init_packet_config (&remote_protocol_P); |
96baa820 | 1857 | init_packet_config (&remote_protocol_Z); |
43ff13b4 | 1858 | |
c5aa993b | 1859 | general_thread = -2; |
43ff13b4 JM |
1860 | continue_thread = -2; |
1861 | ||
1862 | /* Force remote_write_bytes to check whether target supports | |
1863 | binary downloading. */ | |
96baa820 | 1864 | init_packet_config (&remote_protocol_binary_download); |
43ff13b4 | 1865 | |
43ff13b4 JM |
1866 | /* Without this, some commands which require an active target (such |
1867 | as kill) won't work. This variable serves (at least) double duty | |
1868 | as both the pid of the target process (if it has such), and as a | |
1869 | flag indicating that a target is active. These functions should | |
1870 | be split out into seperate variables, especially since GDB will | |
1871 | someday have a notion of debugging several processes. */ | |
43ff13b4 | 1872 | inferior_pid = MAGIC_NULL_PID; |
6426a772 JM |
1873 | |
1874 | /* With this target we start out by owning the terminal. */ | |
1875 | remote_async_terminal_ours_p = 1; | |
1876 | ||
1877 | /* FIXME: cagney/1999-09-23: During the initial connection it is | |
1878 | assumed that the target is already ready and able to respond to | |
1879 | requests. Unfortunatly remote_start_remote() eventually calls | |
1880 | wait_for_inferior() with no timeout. wait_forever_enabled_p gets | |
1881 | around this. Eventually a mechanism that allows | |
1882 | wait_for_inferior() to expect/get timeouts will be | |
1883 | implemented. */ | |
1884 | wait_forever_enabled_p = 0; | |
1885 | ||
43ff13b4 JM |
1886 | /* Start the remote connection; if error (0), discard this target. |
1887 | In particular, if the user quits, be sure to discard it | |
1888 | (we'd be in an inconsistent state otherwise). */ | |
c5aa993b JM |
1889 | if (!catch_errors (remote_start_remote, NULL, |
1890 | "Couldn't establish connection to remote target\n", | |
43ff13b4 JM |
1891 | RETURN_MASK_ALL)) |
1892 | { | |
43ff13b4 | 1893 | pop_target (); |
6426a772 | 1894 | wait_forever_enabled_p = 1; |
43ff13b4 JM |
1895 | return; |
1896 | } | |
1897 | ||
6426a772 JM |
1898 | wait_forever_enabled_p = 1; |
1899 | ||
1900 | if (extended_p) | |
43ff13b4 | 1901 | { |
6426a772 JM |
1902 | /* tell the remote that we're using the extended protocol. */ |
1903 | char *buf = alloca (PBUFSIZ); | |
1904 | putpkt ("!"); | |
1905 | getpkt (buf, 0); | |
43ff13b4 | 1906 | } |
43ff13b4 JM |
1907 | } |
1908 | ||
c906108c SS |
1909 | /* This takes a program previously attached to and detaches it. After |
1910 | this is done, GDB can be used to debug some other program. We | |
1911 | better not have left any breakpoints in the target program or it'll | |
1912 | die when it hits one. */ | |
1913 | ||
1914 | static void | |
1915 | remote_detach (args, from_tty) | |
1916 | char *args; | |
1917 | int from_tty; | |
1918 | { | |
085dd6e6 | 1919 | char *buf = alloca (PBUFSIZ); |
c906108c SS |
1920 | |
1921 | if (args) | |
1922 | error ("Argument given to \"detach\" when remotely debugging."); | |
1923 | ||
1924 | /* Tell the remote target to detach. */ | |
1925 | strcpy (buf, "D"); | |
1926 | remote_send (buf); | |
1927 | ||
1928 | pop_target (); | |
1929 | if (from_tty) | |
1930 | puts_filtered ("Ending remote debugging.\n"); | |
96baa820 | 1931 | |
c906108c SS |
1932 | } |
1933 | ||
43ff13b4 JM |
1934 | /* Same as remote_detach, but with async support. */ |
1935 | static void | |
1936 | remote_async_detach (args, from_tty) | |
1937 | char *args; | |
1938 | int from_tty; | |
1939 | { | |
1940 | char *buf = alloca (PBUFSIZ); | |
1941 | ||
1942 | if (args) | |
1943 | error ("Argument given to \"detach\" when remotely debugging."); | |
1944 | ||
1945 | /* Tell the remote target to detach. */ | |
1946 | strcpy (buf, "D"); | |
1947 | remote_send (buf); | |
1948 | ||
1949 | /* Unregister the file descriptor from the event loop. */ | |
c2c6d25f JM |
1950 | if (SERIAL_IS_ASYNC_P (remote_desc)) |
1951 | SERIAL_ASYNC (remote_desc, NULL, 0); | |
43ff13b4 JM |
1952 | |
1953 | pop_target (); | |
1954 | if (from_tty) | |
1955 | puts_filtered ("Ending remote debugging.\n"); | |
1956 | } | |
1957 | ||
c906108c SS |
1958 | /* Convert hex digit A to a number. */ |
1959 | ||
1960 | int | |
1961 | fromhex (a) | |
1962 | int a; | |
1963 | { | |
1964 | if (a >= '0' && a <= '9') | |
1965 | return a - '0'; | |
1966 | else if (a >= 'a' && a <= 'f') | |
1967 | return a - 'a' + 10; | |
1968 | else if (a >= 'A' && a <= 'F') | |
1969 | return a - 'A' + 10; | |
c5aa993b | 1970 | else |
c906108c SS |
1971 | error ("Reply contains invalid hex digit %d", a); |
1972 | } | |
1973 | ||
1974 | /* Convert number NIB to a hex digit. */ | |
1975 | ||
1976 | static int | |
1977 | tohex (nib) | |
1978 | int nib; | |
1979 | { | |
1980 | if (nib < 10) | |
c5aa993b | 1981 | return '0' + nib; |
c906108c | 1982 | else |
c5aa993b | 1983 | return 'a' + nib - 10; |
c906108c SS |
1984 | } |
1985 | \f | |
1986 | /* Tell the remote machine to resume. */ | |
1987 | ||
1988 | static enum target_signal last_sent_signal = TARGET_SIGNAL_0; | |
1989 | ||
1990 | static int last_sent_step; | |
1991 | ||
1992 | static void | |
1993 | remote_resume (pid, step, siggnal) | |
1994 | int pid, step; | |
1995 | enum target_signal siggnal; | |
1996 | { | |
085dd6e6 | 1997 | char *buf = alloca (PBUFSIZ); |
c906108c SS |
1998 | |
1999 | if (pid == -1) | |
2000 | set_thread (0, 0); /* run any thread */ | |
2001 | else | |
2002 | set_thread (pid, 0); /* run this thread */ | |
2003 | ||
2004 | dcache_flush (remote_dcache); | |
2005 | ||
2006 | last_sent_signal = siggnal; | |
2007 | last_sent_step = step; | |
2008 | ||
2009 | /* A hook for when we need to do something at the last moment before | |
2010 | resumption. */ | |
2011 | if (target_resume_hook) | |
2012 | (*target_resume_hook) (); | |
2013 | ||
2014 | if (siggnal != TARGET_SIGNAL_0) | |
2015 | { | |
2016 | buf[0] = step ? 'S' : 'C'; | |
c5aa993b JM |
2017 | buf[1] = tohex (((int) siggnal >> 4) & 0xf); |
2018 | buf[2] = tohex ((int) siggnal & 0xf); | |
c906108c SS |
2019 | buf[3] = '\0'; |
2020 | } | |
2021 | else | |
c5aa993b | 2022 | strcpy (buf, step ? "s" : "c"); |
c906108c SS |
2023 | |
2024 | putpkt (buf); | |
2025 | } | |
43ff13b4 JM |
2026 | |
2027 | /* Same as remote_resume, but with async support. */ | |
2028 | static void | |
2029 | remote_async_resume (pid, step, siggnal) | |
2030 | int pid, step; | |
2031 | enum target_signal siggnal; | |
2032 | { | |
2033 | char *buf = alloca (PBUFSIZ); | |
2034 | ||
2035 | if (pid == -1) | |
2036 | set_thread (0, 0); /* run any thread */ | |
2037 | else | |
2038 | set_thread (pid, 0); /* run this thread */ | |
2039 | ||
2040 | dcache_flush (remote_dcache); | |
2041 | ||
2042 | last_sent_signal = siggnal; | |
2043 | last_sent_step = step; | |
2044 | ||
2045 | /* A hook for when we need to do something at the last moment before | |
2046 | resumption. */ | |
2047 | if (target_resume_hook) | |
2048 | (*target_resume_hook) (); | |
2049 | ||
43ff13b4 JM |
2050 | if (siggnal != TARGET_SIGNAL_0) |
2051 | { | |
2052 | buf[0] = step ? 'S' : 'C'; | |
c5aa993b JM |
2053 | buf[1] = tohex (((int) siggnal >> 4) & 0xf); |
2054 | buf[2] = tohex ((int) siggnal & 0xf); | |
43ff13b4 JM |
2055 | buf[3] = '\0'; |
2056 | } | |
2057 | else | |
c5aa993b | 2058 | strcpy (buf, step ? "s" : "c"); |
43ff13b4 | 2059 | |
2acceee2 JM |
2060 | /* We are about to start executing the inferior, let's register it |
2061 | with the event loop. NOTE: this is the one place where all the | |
2062 | execution commands end up. We could alternatively do this in each | |
2063 | of the execution commands in infcmd.c.*/ | |
2064 | /* FIXME: ezannoni 1999-09-28: We may need to move this out of here | |
2065 | into infcmd.c in order to allow inferior function calls to work | |
2066 | NOT asynchronously. */ | |
2067 | if (event_loop_p && SERIAL_CAN_ASYNC_P (remote_desc)) | |
2068 | target_async (inferior_event_handler, 0); | |
2069 | /* Tell the world that the target is now executing. */ | |
2070 | /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set | |
2071 | this? Instead, should the client of target just assume (for | |
2072 | async targets) that the target is going to start executing? Is | |
2073 | this information already found in the continuation block? */ | |
2074 | if (SERIAL_IS_ASYNC_P (remote_desc)) | |
2075 | target_executing = 1; | |
43ff13b4 JM |
2076 | putpkt (buf); |
2077 | } | |
c906108c | 2078 | \f |
43ff13b4 JM |
2079 | |
2080 | /* Set up the signal handler for SIGINT, while the target is | |
2081 | executing, ovewriting the 'regular' SIGINT signal handler. */ | |
2082 | static void | |
2083 | initialize_sigint_signal_handler () | |
2084 | { | |
c5aa993b | 2085 | sigint_remote_token = |
43ff13b4 JM |
2086 | create_async_signal_handler (async_remote_interrupt, NULL); |
2087 | signal (SIGINT, handle_remote_sigint); | |
2088 | } | |
2089 | ||
2090 | /* Signal handler for SIGINT, while the target is executing. */ | |
2091 | static void | |
2092 | handle_remote_sigint (sig) | |
2093 | int sig; | |
2094 | { | |
2095 | signal (sig, handle_remote_sigint_twice); | |
c5aa993b | 2096 | sigint_remote_twice_token = |
43ff13b4 JM |
2097 | create_async_signal_handler (async_remote_interrupt_twice, NULL); |
2098 | mark_async_signal_handler_wrapper (sigint_remote_token); | |
2099 | } | |
2100 | ||
2101 | /* Signal handler for SIGINT, installed after SIGINT has already been | |
2102 | sent once. It will take effect the second time that the user sends | |
2103 | a ^C. */ | |
2104 | static void | |
2105 | handle_remote_sigint_twice (sig) | |
2106 | int sig; | |
2107 | { | |
2108 | signal (sig, handle_sigint); | |
c5aa993b | 2109 | sigint_remote_twice_token = |
2df3850c | 2110 | create_async_signal_handler (inferior_event_handler_wrapper, NULL); |
43ff13b4 JM |
2111 | mark_async_signal_handler_wrapper (sigint_remote_twice_token); |
2112 | } | |
2113 | ||
6426a772 | 2114 | /* Perform the real interruption of the target execution, in response |
43ff13b4 | 2115 | to a ^C. */ |
c5aa993b | 2116 | static void |
43ff13b4 JM |
2117 | async_remote_interrupt (arg) |
2118 | gdb_client_data arg; | |
2119 | { | |
2120 | if (remote_debug) | |
2121 | fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n"); | |
2122 | ||
2123 | target_stop (); | |
2124 | } | |
2125 | ||
2126 | /* Perform interrupt, if the first attempt did not succeed. Just give | |
2127 | up on the target alltogether. */ | |
2df3850c | 2128 | void |
43ff13b4 JM |
2129 | async_remote_interrupt_twice (arg) |
2130 | gdb_client_data arg; | |
2131 | { | |
2df3850c JM |
2132 | if (remote_debug) |
2133 | fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n"); | |
6426a772 JM |
2134 | /* Do something only if the target was not killed by the previous |
2135 | cntl-C. */ | |
2136 | if (target_executing) | |
2137 | { | |
2138 | interrupt_query (); | |
2139 | signal (SIGINT, handle_remote_sigint); | |
2140 | } | |
43ff13b4 JM |
2141 | } |
2142 | ||
2143 | /* Reinstall the usual SIGINT handlers, after the target has | |
2144 | stopped. */ | |
6426a772 JM |
2145 | static void |
2146 | cleanup_sigint_signal_handler (void *dummy) | |
43ff13b4 JM |
2147 | { |
2148 | signal (SIGINT, handle_sigint); | |
2149 | if (sigint_remote_twice_token) | |
c2c6d25f | 2150 | delete_async_signal_handler ((struct async_signal_handler **) & sigint_remote_twice_token); |
43ff13b4 | 2151 | if (sigint_remote_token) |
c2c6d25f | 2152 | delete_async_signal_handler ((struct async_signal_handler **) & sigint_remote_token); |
43ff13b4 JM |
2153 | } |
2154 | ||
c906108c SS |
2155 | /* Send ^C to target to halt it. Target will respond, and send us a |
2156 | packet. */ | |
c906108c SS |
2157 | static void (*ofunc) PARAMS ((int)); |
2158 | ||
7a292a7a SS |
2159 | /* The command line interface's stop routine. This function is installed |
2160 | as a signal handler for SIGINT. The first time a user requests a | |
2161 | stop, we call remote_stop to send a break or ^C. If there is no | |
2162 | response from the target (it didn't stop when the user requested it), | |
2163 | we ask the user if he'd like to detach from the target. */ | |
c906108c SS |
2164 | static void |
2165 | remote_interrupt (signo) | |
2166 | int signo; | |
2167 | { | |
7a292a7a SS |
2168 | /* If this doesn't work, try more severe steps. */ |
2169 | signal (signo, remote_interrupt_twice); | |
2170 | ||
2171 | if (remote_debug) | |
0f71a2f6 | 2172 | fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n"); |
7a292a7a SS |
2173 | |
2174 | target_stop (); | |
2175 | } | |
2176 | ||
2177 | /* The user typed ^C twice. */ | |
2178 | ||
2179 | static void | |
2180 | remote_interrupt_twice (signo) | |
2181 | int signo; | |
2182 | { | |
2183 | signal (signo, ofunc); | |
2184 | interrupt_query (); | |
c906108c SS |
2185 | signal (signo, remote_interrupt); |
2186 | } | |
7a292a7a SS |
2187 | |
2188 | /* This is the generic stop called via the target vector. When a target | |
2189 | interrupt is requested, either by the command line or the GUI, we | |
2190 | will eventually end up here. */ | |
c906108c SS |
2191 | static void |
2192 | remote_stop () | |
2193 | { | |
7a292a7a SS |
2194 | /* Send a break or a ^C, depending on user preference. */ |
2195 | if (remote_debug) | |
0f71a2f6 | 2196 | fprintf_unfiltered (gdb_stdlog, "remote_stop called\n"); |
c906108c | 2197 | |
7a292a7a SS |
2198 | if (remote_break) |
2199 | SERIAL_SEND_BREAK (remote_desc); | |
c906108c | 2200 | else |
7a292a7a | 2201 | SERIAL_WRITE (remote_desc, "\003", 1); |
c906108c SS |
2202 | } |
2203 | ||
2204 | /* Ask the user what to do when an interrupt is received. */ | |
2205 | ||
2206 | static void | |
2207 | interrupt_query () | |
2208 | { | |
2209 | target_terminal_ours (); | |
2210 | ||
2211 | if (query ("Interrupted while waiting for the program.\n\ | |
2212 | Give up (and stop debugging it)? ")) | |
2213 | { | |
2214 | target_mourn_inferior (); | |
2215 | return_to_top_level (RETURN_QUIT); | |
2216 | } | |
2217 | ||
2218 | target_terminal_inferior (); | |
2219 | } | |
2220 | ||
6426a772 JM |
2221 | /* Enable/disable target terminal ownership. Most targets can use |
2222 | terminal groups to control terminal ownership. Remote targets are | |
2223 | different in that explicit transfer of ownership to/from GDB/target | |
2224 | is required. */ | |
2225 | ||
2226 | static void | |
2227 | remote_async_terminal_inferior (void) | |
2228 | { | |
2229 | /* FIXME: cagney/1999-09-27: Shouldn't need to test for | |
2230 | sync_execution here. This function should only be called when | |
2231 | GDB is resuming the inferior in the forground. A background | |
2232 | resume (``run&'') should leave GDB in control of the terminal and | |
2233 | consequently should not call this code. */ | |
2234 | if (!sync_execution) | |
2235 | return; | |
2236 | /* FIXME: cagney/1999-09-27: Closely related to the above. Make | |
2237 | calls target_terminal_*() idenpotent. The event-loop GDB talking | |
2238 | to an asynchronous target with a synchronous command calls this | |
2239 | function from both event-top.c and infrun.c/infcmd.c. Once GDB | |
2240 | stops trying to transfer the terminal to the target when it | |
2241 | shouldn't this guard can go away. */ | |
2242 | if (!remote_async_terminal_ours_p) | |
2243 | return; | |
2244 | delete_file_handler (input_fd); | |
2245 | remote_async_terminal_ours_p = 0; | |
2246 | initialize_sigint_signal_handler (); | |
2247 | /* NOTE: At this point we could also register our selves as the | |
2248 | recipient of all input. Any characters typed could then be | |
2249 | passed on down to the target. */ | |
2250 | } | |
2251 | ||
2252 | static void | |
2253 | remote_async_terminal_ours (void) | |
2254 | { | |
2255 | /* See FIXME in remote_async_terminal_inferior. */ | |
2256 | if (!sync_execution) | |
2257 | return; | |
2258 | /* See FIXME in remote_async_terminal_inferior. */ | |
2259 | if (remote_async_terminal_ours_p) | |
2260 | return; | |
2261 | cleanup_sigint_signal_handler (NULL); | |
2262 | add_file_handler (input_fd, stdin_event_handler, 0); | |
2263 | remote_async_terminal_ours_p = 1; | |
2264 | } | |
2265 | ||
c906108c SS |
2266 | /* If nonzero, ignore the next kill. */ |
2267 | ||
2268 | int kill_kludge; | |
2269 | ||
2270 | void | |
917317f4 | 2271 | remote_console_output (char *msg) |
c906108c SS |
2272 | { |
2273 | char *p; | |
2274 | ||
c5aa993b | 2275 | for (p = msg; p[0] && p[1]; p += 2) |
c906108c SS |
2276 | { |
2277 | char tb[2]; | |
2278 | char c = fromhex (p[0]) * 16 + fromhex (p[1]); | |
2279 | tb[0] = c; | |
2280 | tb[1] = 0; | |
43ff13b4 | 2281 | fputs_unfiltered (tb, gdb_stdtarg); |
c906108c | 2282 | } |
917317f4 | 2283 | gdb_flush (gdb_stdtarg); |
c906108c SS |
2284 | } |
2285 | ||
0f71a2f6 JM |
2286 | /* Wait until the remote machine stops, then return, |
2287 | storing status in STATUS just as `wait' would. | |
2288 | Returns "pid", which in the case of a multi-threaded | |
2289 | remote OS, is the thread-id. */ | |
c906108c SS |
2290 | |
2291 | static int | |
2292 | remote_wait (pid, status) | |
2293 | int pid; | |
2294 | struct target_waitstatus *status; | |
2295 | { | |
085dd6e6 | 2296 | unsigned char *buf = alloca (PBUFSIZ); |
c906108c SS |
2297 | int thread_num = -1; |
2298 | ||
2299 | status->kind = TARGET_WAITKIND_EXITED; | |
2300 | status->value.integer = 0; | |
2301 | ||
2302 | while (1) | |
2303 | { | |
2304 | unsigned char *p; | |
2305 | ||
c906108c SS |
2306 | ofunc = signal (SIGINT, remote_interrupt); |
2307 | getpkt ((char *) buf, 1); | |
2308 | signal (SIGINT, ofunc); | |
2309 | ||
2310 | /* This is a hook for when we need to do something (perhaps the | |
c5aa993b | 2311 | collection of trace data) every time the target stops. */ |
c906108c SS |
2312 | if (target_wait_loop_hook) |
2313 | (*target_wait_loop_hook) (); | |
2314 | ||
2315 | switch (buf[0]) | |
2316 | { | |
2317 | case 'E': /* Error of some sort */ | |
2318 | warning ("Remote failure reply: %s", buf); | |
2319 | continue; | |
2320 | case 'T': /* Status with PC, SP, FP, ... */ | |
2321 | { | |
2322 | int i; | |
2323 | long regno; | |
2324 | char regs[MAX_REGISTER_RAW_SIZE]; | |
2325 | ||
2326 | /* Expedited reply, containing Signal, {regno, reg} repeat */ | |
2327 | /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where | |
c5aa993b JM |
2328 | ss = signal number |
2329 | n... = register number | |
2330 | r... = register contents | |
2331 | */ | |
c906108c SS |
2332 | p = &buf[3]; /* after Txx */ |
2333 | ||
2334 | while (*p) | |
2335 | { | |
2336 | unsigned char *p1; | |
2337 | char *p_temp; | |
2338 | ||
2339 | /* Read the register number */ | |
2340 | regno = strtol ((const char *) p, &p_temp, 16); | |
c5aa993b | 2341 | p1 = (unsigned char *) p_temp; |
c906108c | 2342 | |
c5aa993b | 2343 | if (p1 == p) /* No register number present here */ |
c906108c SS |
2344 | { |
2345 | p1 = (unsigned char *) strchr ((const char *) p, ':'); | |
2346 | if (p1 == NULL) | |
2347 | warning ("Malformed packet(a) (missing colon): %s\n\ | |
2348 | Packet: '%s'\n", | |
2349 | p, buf); | |
2350 | if (strncmp ((const char *) p, "thread", p1 - p) == 0) | |
2351 | { | |
2352 | p_temp = unpack_varlen_hex (++p1, &thread_num); | |
2353 | record_currthread (thread_num); | |
2354 | p = (unsigned char *) p_temp; | |
2355 | } | |
2356 | } | |
2357 | else | |
2358 | { | |
2359 | p = p1; | |
2360 | ||
2361 | if (*p++ != ':') | |
2362 | warning ("Malformed packet(b) (missing colon): %s\n\ | |
2363 | Packet: '%s'\n", | |
2364 | p, buf); | |
2365 | ||
2366 | if (regno >= NUM_REGS) | |
2367 | warning ("Remote sent bad register number %ld: %s\n\ | |
2368 | Packet: '%s'\n", | |
2369 | regno, p, buf); | |
2370 | ||
2371 | for (i = 0; i < REGISTER_RAW_SIZE (regno); i++) | |
2372 | { | |
2373 | if (p[0] == 0 || p[1] == 0) | |
2374 | warning ("Remote reply is too short: %s", buf); | |
2375 | regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]); | |
2376 | p += 2; | |
2377 | } | |
2378 | supply_register (regno, regs); | |
2379 | } | |
2380 | ||
2381 | if (*p++ != ';') | |
2382 | { | |
2383 | warning ("Remote register badly formatted: %s", buf); | |
c5aa993b | 2384 | warning (" here: %s", p); |
c906108c SS |
2385 | } |
2386 | } | |
2387 | } | |
2388 | /* fall through */ | |
2389 | case 'S': /* Old style status, just signal only */ | |
2390 | status->kind = TARGET_WAITKIND_STOPPED; | |
2391 | status->value.sig = (enum target_signal) | |
2392 | (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); | |
2393 | ||
0f71a2f6 JM |
2394 | if (buf[3] == 'p') |
2395 | { | |
2396 | /* Export Cisco kernel mode as a convenience variable | |
c5aa993b | 2397 | (so that it can be used in the GDB prompt if desired). */ |
0f71a2f6 JM |
2398 | |
2399 | if (cisco_kernel_mode == 1) | |
c5aa993b | 2400 | set_internalvar (lookup_internalvar ("cisco_kernel_mode"), |
0f71a2f6 JM |
2401 | value_from_string ("PDEBUG-")); |
2402 | cisco_kernel_mode = 0; | |
2403 | thread_num = strtol ((const char *) &buf[4], NULL, 16); | |
2404 | record_currthread (thread_num); | |
2405 | } | |
2406 | else if (buf[3] == 'k') | |
2407 | { | |
2408 | /* Export Cisco kernel mode as a convenience variable | |
c5aa993b | 2409 | (so that it can be used in the GDB prompt if desired). */ |
0f71a2f6 JM |
2410 | |
2411 | if (cisco_kernel_mode == 1) | |
c5aa993b | 2412 | set_internalvar (lookup_internalvar ("cisco_kernel_mode"), |
0f71a2f6 JM |
2413 | value_from_string ("KDEBUG-")); |
2414 | cisco_kernel_mode = 1; | |
2415 | } | |
c906108c | 2416 | goto got_status; |
0f71a2f6 JM |
2417 | case 'N': /* Cisco special: status and offsets */ |
2418 | { | |
2419 | bfd_vma text_addr, data_addr, bss_addr; | |
2420 | bfd_signed_vma text_off, data_off, bss_off; | |
2421 | unsigned char *p1; | |
2422 | ||
2423 | status->kind = TARGET_WAITKIND_STOPPED; | |
2424 | status->value.sig = (enum target_signal) | |
2425 | (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); | |
2426 | ||
c5aa993b | 2427 | if (symfile_objfile == NULL) |
0f71a2f6 | 2428 | { |
d4f3574e | 2429 | warning ("Relocation packet received with no symbol file. \ |
0f71a2f6 JM |
2430 | Packet Dropped"); |
2431 | goto got_status; | |
2432 | } | |
2433 | ||
2434 | /* Relocate object file. Buffer format is NAATT;DD;BB | |
2435 | * where AA is the signal number, TT is the new text | |
2436 | * address, DD * is the new data address, and BB is the | |
2437 | * new bss address. */ | |
2438 | ||
2439 | p = &buf[3]; | |
2440 | text_addr = strtoul (p, (char **) &p1, 16); | |
2441 | if (p1 == p || *p1 != ';') | |
2442 | warning ("Malformed relocation packet: Packet '%s'", buf); | |
2443 | p = p1 + 1; | |
2444 | data_addr = strtoul (p, (char **) &p1, 16); | |
2445 | if (p1 == p || *p1 != ';') | |
2446 | warning ("Malformed relocation packet: Packet '%s'", buf); | |
2447 | p = p1 + 1; | |
2448 | bss_addr = strtoul (p, (char **) &p1, 16); | |
c5aa993b | 2449 | if (p1 == p) |
0f71a2f6 JM |
2450 | warning ("Malformed relocation packet: Packet '%s'", buf); |
2451 | ||
2452 | if (remote_cisco_section_offsets (text_addr, data_addr, bss_addr, | |
2453 | &text_off, &data_off, &bss_off) | |
2454 | == 0) | |
c5aa993b | 2455 | if (text_off != 0 || data_off != 0 || bss_off != 0) |
0f71a2f6 JM |
2456 | remote_cisco_objfile_relocate (text_off, data_off, bss_off); |
2457 | ||
2458 | goto got_status; | |
2459 | } | |
c906108c SS |
2460 | case 'W': /* Target exited */ |
2461 | { | |
2462 | /* The remote process exited. */ | |
2463 | status->kind = TARGET_WAITKIND_EXITED; | |
2464 | status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]); | |
2465 | goto got_status; | |
2466 | } | |
2467 | case 'X': | |
2468 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
2469 | status->value.sig = (enum target_signal) | |
2470 | (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); | |
2471 | kill_kludge = 1; | |
2472 | ||
2473 | goto got_status; | |
2474 | case 'O': /* Console output */ | |
2475 | remote_console_output (buf + 1); | |
2476 | continue; | |
2477 | case '\0': | |
2478 | if (last_sent_signal != TARGET_SIGNAL_0) | |
2479 | { | |
2480 | /* Zero length reply means that we tried 'S' or 'C' and | |
c5aa993b | 2481 | the remote system doesn't support it. */ |
c906108c SS |
2482 | target_terminal_ours_for_output (); |
2483 | printf_filtered | |
2484 | ("Can't send signals to this remote system. %s not sent.\n", | |
2485 | target_signal_to_name (last_sent_signal)); | |
2486 | last_sent_signal = TARGET_SIGNAL_0; | |
2487 | target_terminal_inferior (); | |
2488 | ||
2489 | strcpy ((char *) buf, last_sent_step ? "s" : "c"); | |
2490 | putpkt ((char *) buf); | |
2491 | continue; | |
2492 | } | |
2493 | /* else fallthrough */ | |
2494 | default: | |
2495 | warning ("Invalid remote reply: %s", buf); | |
2496 | continue; | |
2497 | } | |
2498 | } | |
c5aa993b | 2499 | got_status: |
c906108c SS |
2500 | if (thread_num != -1) |
2501 | { | |
c906108c SS |
2502 | return thread_num; |
2503 | } | |
2504 | return inferior_pid; | |
2505 | } | |
2506 | ||
43ff13b4 JM |
2507 | /* Async version of remote_wait. */ |
2508 | static int | |
2509 | remote_async_wait (pid, status) | |
2510 | int pid; | |
2511 | struct target_waitstatus *status; | |
2512 | { | |
2513 | unsigned char *buf = alloca (PBUFSIZ); | |
2514 | int thread_num = -1; | |
2515 | ||
2516 | status->kind = TARGET_WAITKIND_EXITED; | |
2517 | status->value.integer = 0; | |
2518 | ||
2519 | while (1) | |
2520 | { | |
2521 | unsigned char *p; | |
c5aa993b | 2522 | |
c2c6d25f | 2523 | if (!SERIAL_IS_ASYNC_P (remote_desc)) |
43ff13b4 | 2524 | ofunc = signal (SIGINT, remote_interrupt); |
6426a772 JM |
2525 | /* FIXME: cagney/1999-09-27: If we're in async mode we should |
2526 | _never_ wait for ever -> test on target_is_async_p(). | |
2527 | However, before we do that we need to ensure that the caller | |
2528 | knows how to take the target into/out of async mode. */ | |
2529 | getpkt ((char *) buf, wait_forever_enabled_p); | |
c2c6d25f | 2530 | if (!SERIAL_IS_ASYNC_P (remote_desc)) |
43ff13b4 JM |
2531 | signal (SIGINT, ofunc); |
2532 | ||
2533 | /* This is a hook for when we need to do something (perhaps the | |
c5aa993b | 2534 | collection of trace data) every time the target stops. */ |
43ff13b4 JM |
2535 | if (target_wait_loop_hook) |
2536 | (*target_wait_loop_hook) (); | |
2537 | ||
2538 | switch (buf[0]) | |
2539 | { | |
2540 | case 'E': /* Error of some sort */ | |
2541 | warning ("Remote failure reply: %s", buf); | |
2542 | continue; | |
2543 | case 'T': /* Status with PC, SP, FP, ... */ | |
2544 | { | |
2545 | int i; | |
2546 | long regno; | |
2547 | char regs[MAX_REGISTER_RAW_SIZE]; | |
2548 | ||
2549 | /* Expedited reply, containing Signal, {regno, reg} repeat */ | |
2550 | /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where | |
c5aa993b JM |
2551 | ss = signal number |
2552 | n... = register number | |
2553 | r... = register contents | |
2554 | */ | |
43ff13b4 JM |
2555 | p = &buf[3]; /* after Txx */ |
2556 | ||
2557 | while (*p) | |
2558 | { | |
2559 | unsigned char *p1; | |
2560 | char *p_temp; | |
2561 | ||
2562 | /* Read the register number */ | |
2563 | regno = strtol ((const char *) p, &p_temp, 16); | |
c5aa993b | 2564 | p1 = (unsigned char *) p_temp; |
43ff13b4 | 2565 | |
c5aa993b | 2566 | if (p1 == p) /* No register number present here */ |
43ff13b4 JM |
2567 | { |
2568 | p1 = (unsigned char *) strchr ((const char *) p, ':'); | |
2569 | if (p1 == NULL) | |
2570 | warning ("Malformed packet(a) (missing colon): %s\n\ | |
2571 | Packet: '%s'\n", | |
2572 | p, buf); | |
2573 | if (strncmp ((const char *) p, "thread", p1 - p) == 0) | |
2574 | { | |
2575 | p_temp = unpack_varlen_hex (++p1, &thread_num); | |
2576 | record_currthread (thread_num); | |
2577 | p = (unsigned char *) p_temp; | |
2578 | } | |
2579 | } | |
2580 | else | |
2581 | { | |
2582 | p = p1; | |
2583 | ||
2584 | if (*p++ != ':') | |
2585 | warning ("Malformed packet(b) (missing colon): %s\n\ | |
2586 | Packet: '%s'\n", | |
2587 | p, buf); | |
2588 | ||
2589 | if (regno >= NUM_REGS) | |
2590 | warning ("Remote sent bad register number %ld: %s\n\ | |
2591 | Packet: '%s'\n", | |
2592 | regno, p, buf); | |
2593 | ||
2594 | for (i = 0; i < REGISTER_RAW_SIZE (regno); i++) | |
2595 | { | |
2596 | if (p[0] == 0 || p[1] == 0) | |
2597 | warning ("Remote reply is too short: %s", buf); | |
2598 | regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]); | |
2599 | p += 2; | |
2600 | } | |
2601 | supply_register (regno, regs); | |
2602 | } | |
2603 | ||
2604 | if (*p++ != ';') | |
2605 | { | |
2606 | warning ("Remote register badly formatted: %s", buf); | |
c5aa993b | 2607 | warning (" here: %s", p); |
43ff13b4 JM |
2608 | } |
2609 | } | |
2610 | } | |
2611 | /* fall through */ | |
2612 | case 'S': /* Old style status, just signal only */ | |
2613 | status->kind = TARGET_WAITKIND_STOPPED; | |
2614 | status->value.sig = (enum target_signal) | |
2615 | (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); | |
2616 | ||
2617 | if (buf[3] == 'p') | |
2618 | { | |
2619 | /* Export Cisco kernel mode as a convenience variable | |
c5aa993b | 2620 | (so that it can be used in the GDB prompt if desired). */ |
43ff13b4 JM |
2621 | |
2622 | if (cisco_kernel_mode == 1) | |
c5aa993b | 2623 | set_internalvar (lookup_internalvar ("cisco_kernel_mode"), |
43ff13b4 JM |
2624 | value_from_string ("PDEBUG-")); |
2625 | cisco_kernel_mode = 0; | |
2626 | thread_num = strtol ((const char *) &buf[4], NULL, 16); | |
2627 | record_currthread (thread_num); | |
2628 | } | |
2629 | else if (buf[3] == 'k') | |
2630 | { | |
2631 | /* Export Cisco kernel mode as a convenience variable | |
c5aa993b | 2632 | (so that it can be used in the GDB prompt if desired). */ |
43ff13b4 JM |
2633 | |
2634 | if (cisco_kernel_mode == 1) | |
c5aa993b | 2635 | set_internalvar (lookup_internalvar ("cisco_kernel_mode"), |
43ff13b4 JM |
2636 | value_from_string ("KDEBUG-")); |
2637 | cisco_kernel_mode = 1; | |
2638 | } | |
2639 | goto got_status; | |
2640 | case 'N': /* Cisco special: status and offsets */ | |
2641 | { | |
2642 | bfd_vma text_addr, data_addr, bss_addr; | |
2643 | bfd_signed_vma text_off, data_off, bss_off; | |
2644 | unsigned char *p1; | |
2645 | ||
2646 | status->kind = TARGET_WAITKIND_STOPPED; | |
2647 | status->value.sig = (enum target_signal) | |
2648 | (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); | |
2649 | ||
c5aa993b | 2650 | if (symfile_objfile == NULL) |
43ff13b4 JM |
2651 | { |
2652 | warning ("Relocation packet recieved with no symbol file. \ | |
2653 | Packet Dropped"); | |
2654 | goto got_status; | |
2655 | } | |
2656 | ||
2657 | /* Relocate object file. Buffer format is NAATT;DD;BB | |
2658 | * where AA is the signal number, TT is the new text | |
2659 | * address, DD * is the new data address, and BB is the | |
2660 | * new bss address. */ | |
2661 | ||
2662 | p = &buf[3]; | |
2663 | text_addr = strtoul (p, (char **) &p1, 16); | |
2664 | if (p1 == p || *p1 != ';') | |
2665 | warning ("Malformed relocation packet: Packet '%s'", buf); | |
2666 | p = p1 + 1; | |
2667 | data_addr = strtoul (p, (char **) &p1, 16); | |
2668 | if (p1 == p || *p1 != ';') | |
2669 | warning ("Malformed relocation packet: Packet '%s'", buf); | |
2670 | p = p1 + 1; | |
2671 | bss_addr = strtoul (p, (char **) &p1, 16); | |
c5aa993b | 2672 | if (p1 == p) |
43ff13b4 JM |
2673 | warning ("Malformed relocation packet: Packet '%s'", buf); |
2674 | ||
2675 | if (remote_cisco_section_offsets (text_addr, data_addr, bss_addr, | |
2676 | &text_off, &data_off, &bss_off) | |
2677 | == 0) | |
c5aa993b | 2678 | if (text_off != 0 || data_off != 0 || bss_off != 0) |
43ff13b4 JM |
2679 | remote_cisco_objfile_relocate (text_off, data_off, bss_off); |
2680 | ||
2681 | goto got_status; | |
2682 | } | |
2683 | case 'W': /* Target exited */ | |
2684 | { | |
2685 | /* The remote process exited. */ | |
2686 | status->kind = TARGET_WAITKIND_EXITED; | |
2687 | status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]); | |
2688 | goto got_status; | |
2689 | } | |
2690 | case 'X': | |
2691 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
2692 | status->value.sig = (enum target_signal) | |
2693 | (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))); | |
2694 | kill_kludge = 1; | |
2695 | ||
2696 | goto got_status; | |
2697 | case 'O': /* Console output */ | |
2698 | remote_console_output (buf + 1); | |
2699 | continue; | |
2700 | case '\0': | |
2701 | if (last_sent_signal != TARGET_SIGNAL_0) | |
2702 | { | |
2703 | /* Zero length reply means that we tried 'S' or 'C' and | |
c5aa993b | 2704 | the remote system doesn't support it. */ |
43ff13b4 JM |
2705 | target_terminal_ours_for_output (); |
2706 | printf_filtered | |
2707 | ("Can't send signals to this remote system. %s not sent.\n", | |
2708 | target_signal_to_name (last_sent_signal)); | |
2709 | last_sent_signal = TARGET_SIGNAL_0; | |
2710 | target_terminal_inferior (); | |
2711 | ||
2712 | strcpy ((char *) buf, last_sent_step ? "s" : "c"); | |
2713 | putpkt ((char *) buf); | |
2714 | continue; | |
2715 | } | |
2716 | /* else fallthrough */ | |
2717 | default: | |
2718 | warning ("Invalid remote reply: %s", buf); | |
2719 | continue; | |
2720 | } | |
2721 | } | |
c5aa993b | 2722 | got_status: |
43ff13b4 JM |
2723 | if (thread_num != -1) |
2724 | { | |
2725 | return thread_num; | |
2726 | } | |
2727 | return inferior_pid; | |
2728 | } | |
2729 | ||
c906108c SS |
2730 | /* Number of bytes of registers this stub implements. */ |
2731 | ||
2732 | static int register_bytes_found; | |
2733 | ||
2734 | /* Read the remote registers into the block REGS. */ | |
2735 | /* Currently we just read all the registers, so we don't use regno. */ | |
2736 | ||
2737 | /* ARGSUSED */ | |
2738 | static void | |
2739 | remote_fetch_registers (regno) | |
2740 | int regno; | |
2741 | { | |
085dd6e6 | 2742 | char *buf = alloca (PBUFSIZ); |
c906108c SS |
2743 | int i; |
2744 | char *p; | |
2745 | char regs[REGISTER_BYTES]; | |
2746 | ||
2747 | set_thread (inferior_pid, 1); | |
2748 | ||
2749 | sprintf (buf, "g"); | |
2750 | remote_send (buf); | |
2751 | ||
2752 | if (remote_register_buf_size == 0) | |
2753 | remote_register_buf_size = strlen (buf); | |
2754 | ||
2755 | /* Unimplemented registers read as all bits zero. */ | |
2756 | memset (regs, 0, REGISTER_BYTES); | |
2757 | ||
2758 | /* We can get out of synch in various cases. If the first character | |
2759 | in the buffer is not a hex character, assume that has happened | |
2760 | and try to fetch another packet to read. */ | |
2761 | while ((buf[0] < '0' || buf[0] > '9') | |
2762 | && (buf[0] < 'a' || buf[0] > 'f') | |
2763 | && buf[0] != 'x') /* New: unavailable register value */ | |
2764 | { | |
2765 | if (remote_debug) | |
0f71a2f6 JM |
2766 | fprintf_unfiltered (gdb_stdlog, |
2767 | "Bad register packet; fetching a new packet\n"); | |
c906108c SS |
2768 | getpkt (buf, 0); |
2769 | } | |
2770 | ||
2771 | /* Reply describes registers byte by byte, each byte encoded as two | |
2772 | hex characters. Suck them all up, then supply them to the | |
2773 | register cacheing/storage mechanism. */ | |
2774 | ||
2775 | p = buf; | |
2776 | for (i = 0; i < REGISTER_BYTES; i++) | |
2777 | { | |
2778 | if (p[0] == 0) | |
2779 | break; | |
2780 | if (p[1] == 0) | |
2781 | { | |
2782 | warning ("Remote reply is of odd length: %s", buf); | |
2783 | /* Don't change register_bytes_found in this case, and don't | |
2784 | print a second warning. */ | |
2785 | goto supply_them; | |
2786 | } | |
2787 | if (p[0] == 'x' && p[1] == 'x') | |
c5aa993b | 2788 | regs[i] = 0; /* 'x' */ |
c906108c SS |
2789 | else |
2790 | regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]); | |
2791 | p += 2; | |
2792 | } | |
2793 | ||
2794 | if (i != register_bytes_found) | |
2795 | { | |
2796 | register_bytes_found = i; | |
2797 | #ifdef REGISTER_BYTES_OK | |
2798 | if (!REGISTER_BYTES_OK (i)) | |
2799 | warning ("Remote reply is too short: %s", buf); | |
2800 | #endif | |
2801 | } | |
c5aa993b JM |
2802 | |
2803 | supply_them: | |
c906108c | 2804 | for (i = 0; i < NUM_REGS; i++) |
c5aa993b JM |
2805 | { |
2806 | supply_register (i, ®s[REGISTER_BYTE (i)]); | |
2807 | if (buf[REGISTER_BYTE (i) * 2] == 'x') | |
2808 | register_valid[i] = -1; /* register value not available */ | |
2809 | } | |
c906108c SS |
2810 | } |
2811 | ||
2812 | /* Prepare to store registers. Since we may send them all (using a | |
2813 | 'G' request), we have to read out the ones we don't want to change | |
2814 | first. */ | |
2815 | ||
c5aa993b | 2816 | static void |
c906108c SS |
2817 | remote_prepare_to_store () |
2818 | { | |
2819 | /* Make sure the entire registers array is valid. */ | |
5a2468f5 JM |
2820 | switch (remote_protocol_P.support) |
2821 | { | |
2822 | case PACKET_DISABLE: | |
2823 | case PACKET_SUPPORT_UNKNOWN: | |
2824 | read_register_bytes (0, (char *) NULL, REGISTER_BYTES); | |
2825 | break; | |
2826 | case PACKET_ENABLE: | |
2827 | break; | |
2828 | } | |
2829 | } | |
2830 | ||
2831 | /* Helper: Attempt to store REGNO using the P packet. Return fail IFF | |
2832 | packet was not recognized. */ | |
2833 | ||
2834 | static int | |
2835 | store_register_using_P (regno) | |
2836 | int regno; | |
2837 | { | |
2838 | /* Try storing a single register. */ | |
2839 | char *buf = alloca (PBUFSIZ); | |
2840 | char *regp; | |
2841 | char *p; | |
2842 | int i; | |
2843 | ||
2844 | sprintf (buf, "P%x=", regno); | |
2845 | p = buf + strlen (buf); | |
2846 | regp = ®isters[REGISTER_BYTE (regno)]; | |
2847 | for (i = 0; i < REGISTER_RAW_SIZE (regno); ++i) | |
2848 | { | |
2849 | *p++ = tohex ((regp[i] >> 4) & 0xf); | |
2850 | *p++ = tohex (regp[i] & 0xf); | |
2851 | } | |
2852 | *p = '\0'; | |
2853 | remote_send (buf); | |
2854 | ||
2855 | return buf[0] != '\0'; | |
c906108c SS |
2856 | } |
2857 | ||
5a2468f5 | 2858 | |
c906108c SS |
2859 | /* Store register REGNO, or all registers if REGNO == -1, from the contents |
2860 | of REGISTERS. FIXME: ignores errors. */ | |
2861 | ||
2862 | static void | |
2863 | remote_store_registers (regno) | |
2864 | int regno; | |
2865 | { | |
085dd6e6 | 2866 | char *buf = alloca (PBUFSIZ); |
c906108c SS |
2867 | int i; |
2868 | char *p; | |
2869 | ||
2870 | set_thread (inferior_pid, 1); | |
2871 | ||
5a2468f5 | 2872 | if (regno >= 0) |
c906108c | 2873 | { |
5a2468f5 | 2874 | switch (remote_protocol_P.support) |
c906108c | 2875 | { |
5a2468f5 JM |
2876 | case PACKET_DISABLE: |
2877 | break; | |
2878 | case PACKET_ENABLE: | |
2879 | if (store_register_using_P (regno)) | |
2880 | return; | |
2881 | else | |
2882 | error ("Protocol error: P packet not recognized by stub"); | |
2883 | case PACKET_SUPPORT_UNKNOWN: | |
2884 | if (store_register_using_P (regno)) | |
2885 | { | |
2886 | /* The stub recognized the 'P' packet. Remember this. */ | |
2887 | remote_protocol_P.support = PACKET_ENABLE; | |
2888 | return; | |
2889 | } | |
2890 | else | |
2891 | { | |
2892 | /* The stub does not support the 'P' packet. Use 'G' | |
2893 | instead, and don't try using 'P' in the future (it | |
2894 | will just waste our time). */ | |
2895 | remote_protocol_P.support = PACKET_DISABLE; | |
2896 | break; | |
2897 | } | |
c906108c | 2898 | } |
c906108c SS |
2899 | } |
2900 | ||
2901 | buf[0] = 'G'; | |
2902 | ||
2903 | /* Command describes registers byte by byte, | |
2904 | each byte encoded as two hex characters. */ | |
2905 | ||
2906 | p = buf + 1; | |
2907 | /* remote_prepare_to_store insures that register_bytes_found gets set. */ | |
2908 | for (i = 0; i < register_bytes_found; i++) | |
2909 | { | |
2910 | *p++ = tohex ((registers[i] >> 4) & 0xf); | |
2911 | *p++ = tohex (registers[i] & 0xf); | |
2912 | } | |
2913 | *p = '\0'; | |
2914 | ||
2915 | remote_send (buf); | |
2916 | } | |
2917 | ||
2918 | /* Use of the data cache *used* to be disabled because it loses for looking | |
2919 | at and changing hardware I/O ports and the like. Accepting `volatile' | |
2920 | would perhaps be one way to fix it. Another idea would be to use the | |
2921 | executable file for the text segment (for all SEC_CODE sections? | |
2922 | For all SEC_READONLY sections?). This has problems if you want to | |
2923 | actually see what the memory contains (e.g. self-modifying code, | |
2924 | clobbered memory, user downloaded the wrong thing). | |
2925 | ||
2926 | Because it speeds so much up, it's now enabled, if you're playing | |
2927 | with registers you turn it of (set remotecache 0). */ | |
2928 | ||
2929 | /* Read a word from remote address ADDR and return it. | |
2930 | This goes through the data cache. */ | |
2931 | ||
c5aa993b | 2932 | #if 0 /* unused? */ |
c906108c SS |
2933 | static int |
2934 | remote_fetch_word (addr) | |
2935 | CORE_ADDR addr; | |
2936 | { | |
2937 | return dcache_fetch (remote_dcache, addr); | |
2938 | } | |
2939 | ||
2940 | /* Write a word WORD into remote address ADDR. | |
2941 | This goes through the data cache. */ | |
2942 | ||
2943 | static void | |
2944 | remote_store_word (addr, word) | |
2945 | CORE_ADDR addr; | |
2946 | int word; | |
2947 | { | |
2948 | dcache_poke (remote_dcache, addr, word); | |
2949 | } | |
c5aa993b | 2950 | #endif /* 0 (unused?) */ |
c906108c SS |
2951 | \f |
2952 | ||
c5aa993b | 2953 | |
c906108c SS |
2954 | /* Return the number of hex digits in num. */ |
2955 | ||
2956 | static int | |
2957 | hexnumlen (num) | |
2958 | ULONGEST num; | |
2959 | { | |
2960 | int i; | |
2961 | ||
2962 | for (i = 0; num != 0; i++) | |
2963 | num >>= 4; | |
2964 | ||
2965 | return max (i, 1); | |
2966 | } | |
2967 | ||
2df3850c | 2968 | /* Set BUF to the minimum number of hex digits representing NUM. */ |
c906108c SS |
2969 | |
2970 | static int | |
2971 | hexnumstr (buf, num) | |
2972 | char *buf; | |
2973 | ULONGEST num; | |
2974 | { | |
c906108c | 2975 | int len = hexnumlen (num); |
2df3850c JM |
2976 | return hexnumnstr (buf, num, len); |
2977 | } | |
2978 | ||
c906108c | 2979 | |
2df3850c | 2980 | /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */ |
c906108c | 2981 | |
2df3850c JM |
2982 | static int |
2983 | hexnumnstr (buf, num, width) | |
2984 | char *buf; | |
2985 | ULONGEST num; | |
2986 | int width; | |
2987 | { | |
2988 | int i; | |
2989 | ||
2990 | buf[width] = '\0'; | |
2991 | ||
2992 | for (i = width - 1; i >= 0; i--) | |
c906108c | 2993 | { |
c5aa993b | 2994 | buf[i] = "0123456789abcdef"[(num & 0xf)]; |
c906108c SS |
2995 | num >>= 4; |
2996 | } | |
2997 | ||
2df3850c | 2998 | return width; |
c906108c SS |
2999 | } |
3000 | ||
3001 | /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */ | |
3002 | ||
3003 | static CORE_ADDR | |
3004 | remote_address_masked (addr) | |
3005 | CORE_ADDR addr; | |
3006 | { | |
3007 | if (remote_address_size > 0 | |
3008 | && remote_address_size < (sizeof (ULONGEST) * 8)) | |
3009 | { | |
3010 | /* Only create a mask when that mask can safely be constructed | |
3011 | in a ULONGEST variable. */ | |
3012 | ULONGEST mask = 1; | |
3013 | mask = (mask << remote_address_size) - 1; | |
3014 | addr &= mask; | |
3015 | } | |
3016 | return addr; | |
3017 | } | |
3018 | ||
3019 | /* Determine whether the remote target supports binary downloading. | |
3020 | This is accomplished by sending a no-op memory write of zero length | |
3021 | to the target at the specified address. It does not suffice to send | |
3022 | the whole packet, since many stubs strip the eighth bit and subsequently | |
7a292a7a SS |
3023 | compute a wrong checksum, which causes real havoc with remote_write_bytes. |
3024 | ||
96baa820 JM |
3025 | NOTE: This can still lose if the serial line is not eight-bit |
3026 | clean. In cases like this, the user should clear "remote | |
3027 | X-packet". */ | |
3028 | ||
c906108c SS |
3029 | static void |
3030 | check_binary_download (addr) | |
3031 | CORE_ADDR addr; | |
3032 | { | |
96baa820 | 3033 | switch (remote_protocol_binary_download.support) |
c906108c | 3034 | { |
96baa820 JM |
3035 | case PACKET_DISABLE: |
3036 | break; | |
3037 | case PACKET_ENABLE: | |
3038 | break; | |
3039 | case PACKET_SUPPORT_UNKNOWN: | |
3040 | { | |
3041 | char *buf = alloca (PBUFSIZ); | |
3042 | char *p; | |
3043 | ||
3044 | p = buf; | |
3045 | *p++ = 'X'; | |
3046 | p += hexnumstr (p, (ULONGEST) addr); | |
3047 | *p++ = ','; | |
3048 | p += hexnumstr (p, (ULONGEST) 0); | |
3049 | *p++ = ':'; | |
3050 | *p = '\0'; | |
3051 | ||
3052 | putpkt_binary (buf, (int) (p - buf)); | |
3053 | getpkt (buf, 0); | |
c906108c | 3054 | |
96baa820 JM |
3055 | if (buf[0] == '\0') |
3056 | { | |
3057 | if (remote_debug) | |
3058 | fprintf_unfiltered (gdb_stdlog, | |
3059 | "binary downloading NOT suppported by target\n"); | |
3060 | remote_protocol_binary_download.support = PACKET_DISABLE; | |
3061 | } | |
3062 | else | |
3063 | { | |
3064 | if (remote_debug) | |
3065 | fprintf_unfiltered (gdb_stdlog, | |
3066 | "binary downloading suppported by target\n"); | |
3067 | remote_protocol_binary_download.support = PACKET_ENABLE; | |
3068 | } | |
3069 | break; | |
3070 | } | |
c906108c SS |
3071 | } |
3072 | } | |
3073 | ||
3074 | /* Write memory data directly to the remote machine. | |
3075 | This does not inform the data cache; the data cache uses this. | |
3076 | MEMADDR is the address in the remote memory space. | |
3077 | MYADDR is the address of the buffer in our space. | |
3078 | LEN is the number of bytes. | |
3079 | ||
917317f4 JM |
3080 | Returns number of bytes transferred, or 0 (setting errno) for |
3081 | error. Only transfer a single packet. */ | |
c906108c SS |
3082 | |
3083 | static int | |
917317f4 | 3084 | remote_write_bytes (CORE_ADDR memaddr, char *myaddr, int len) |
c906108c | 3085 | { |
917317f4 | 3086 | unsigned char *buf; |
c906108c | 3087 | int max_buf_size; /* Max size of packet output buffer */ |
917317f4 JM |
3088 | unsigned char *p; |
3089 | unsigned char *plen; | |
3090 | int plenlen; | |
3091 | int todo; | |
3092 | int nr_bytes; | |
c906108c SS |
3093 | |
3094 | /* Verify that the target can support a binary download */ | |
3095 | check_binary_download (memaddr); | |
3096 | ||
917317f4 | 3097 | /* Determine the max packet size. */ |
c906108c SS |
3098 | max_buf_size = min (remote_write_size, PBUFSIZ); |
3099 | if (remote_register_buf_size != 0) | |
3100 | max_buf_size = min (max_buf_size, remote_register_buf_size); | |
917317f4 | 3101 | buf = alloca (max_buf_size + 1); |
c906108c | 3102 | |
7a292a7a | 3103 | /* Subtract header overhead from max payload size - $M<memaddr>,<len>:#nn */ |
c906108c SS |
3104 | max_buf_size -= 2 + hexnumlen (memaddr + len - 1) + 1 + hexnumlen (len) + 4; |
3105 | ||
917317f4 JM |
3106 | /* construct "M"<memaddr>","<len>":" */ |
3107 | /* sprintf (buf, "M%lx,%x:", (unsigned long) memaddr, todo); */ | |
3108 | p = buf; | |
3109 | ||
3110 | /* Append [XM]. Compute a best guess of the number of bytes | |
3111 | actually transfered. */ | |
3112 | switch (remote_protocol_binary_download.support) | |
c906108c | 3113 | { |
917317f4 JM |
3114 | case PACKET_ENABLE: |
3115 | *p++ = 'X'; | |
3116 | /* Best guess at number of bytes that will fit. */ | |
3117 | todo = min (len, max_buf_size); | |
3118 | break; | |
3119 | case PACKET_DISABLE: | |
3120 | *p++ = 'M'; | |
3121 | /* num bytes that will fit */ | |
3122 | todo = min (len, max_buf_size / 2); | |
3123 | break; | |
3124 | case PACKET_SUPPORT_UNKNOWN: | |
3125 | internal_error ("remote_write_bytes: bad switch"); | |
3126 | } | |
3127 | ||
3128 | /* Append <memaddr> */ | |
3129 | memaddr = remote_address_masked (memaddr); | |
3130 | p += hexnumstr (p, (ULONGEST) memaddr); | |
3131 | *p++ = ','; | |
3132 | ||
3133 | /* Append <len>. Retain the location/size of <len>. It may | |
3134 | need to be adjusted once the packet body has been created. */ | |
3135 | plen = p; | |
3136 | plenlen = hexnumstr (p, (ULONGEST) todo); | |
3137 | p += plenlen; | |
3138 | *p++ = ':'; | |
3139 | *p = '\0'; | |
3140 | ||
3141 | /* Append the packet body. */ | |
3142 | switch (remote_protocol_binary_download.support) | |
3143 | { | |
3144 | case PACKET_ENABLE: | |
3145 | /* Binary mode. Send target system values byte by byte, in | |
3146 | increasing byte addresses. Only escape certain critical | |
3147 | characters. */ | |
3148 | for (nr_bytes = 0; | |
3149 | (nr_bytes < todo) && (p - buf) < (max_buf_size - 2); | |
3150 | nr_bytes++) | |
c906108c | 3151 | { |
917317f4 JM |
3152 | switch (myaddr[nr_bytes] & 0xff) |
3153 | { | |
3154 | case '$': | |
3155 | case '#': | |
3156 | case 0x7d: | |
3157 | /* These must be escaped */ | |
3158 | *p++ = 0x7d; | |
3159 | *p++ = (myaddr[nr_bytes] & 0xff) ^ 0x20; | |
3160 | break; | |
3161 | default: | |
3162 | *p++ = myaddr[nr_bytes] & 0xff; | |
3163 | break; | |
3164 | } | |
c906108c | 3165 | } |
917317f4 | 3166 | if (nr_bytes < todo) |
c906108c | 3167 | { |
917317f4 JM |
3168 | /* Escape chars have filled up the buffer prematurely, |
3169 | and we have actually sent fewer bytes than planned. | |
3170 | Fix-up the length field of the packet. Use the same | |
3171 | number of characters as before. */ | |
3172 | ||
3173 | plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen); | |
3174 | *plen = ':'; /* overwrite \0 from hexnumnstr() */ | |
c906108c | 3175 | } |
917317f4 JM |
3176 | break; |
3177 | case PACKET_DISABLE: | |
3178 | /* Normal mode: Send target system values byte by byte, in | |
3179 | increasing byte addresses. Each byte is encoded as a two hex | |
3180 | value. */ | |
3181 | for (nr_bytes = 0; nr_bytes < todo; nr_bytes++) | |
c906108c | 3182 | { |
917317f4 JM |
3183 | *p++ = tohex ((myaddr[nr_bytes] >> 4) & 0xf); |
3184 | *p++ = tohex (myaddr[nr_bytes] & 0xf); | |
c906108c | 3185 | } |
917317f4 JM |
3186 | *p = '\0'; |
3187 | break; | |
3188 | case PACKET_SUPPORT_UNKNOWN: | |
3189 | internal_error ("remote_write_bytes: bad switch"); | |
c906108c | 3190 | } |
917317f4 JM |
3191 | |
3192 | putpkt_binary (buf, (int) (p - buf)); | |
3193 | getpkt (buf, 0); | |
3194 | ||
3195 | if (buf[0] == 'E') | |
3196 | { | |
3197 | /* There is no correspondance between what the remote protocol | |
3198 | uses for errors and errno codes. We would like a cleaner way | |
3199 | of representing errors (big enough to include errno codes, | |
3200 | bfd_error codes, and others). But for now just return EIO. */ | |
3201 | errno = EIO; | |
3202 | return 0; | |
3203 | } | |
3204 | ||
3205 | /* Return NR_BYTES, not TODO, in case escape chars caused us to send fewer | |
3206 | bytes than we'd planned. */ | |
3207 | return nr_bytes; | |
c906108c SS |
3208 | } |
3209 | ||
3210 | /* Read memory data directly from the remote machine. | |
3211 | This does not use the data cache; the data cache uses this. | |
3212 | MEMADDR is the address in the remote memory space. | |
3213 | MYADDR is the address of the buffer in our space. | |
3214 | LEN is the number of bytes. | |
3215 | ||
3216 | Returns number of bytes transferred, or 0 for error. */ | |
3217 | ||
917317f4 JM |
3218 | /* NOTE: cagney/1999-10-18: This function (and its siblings in other |
3219 | remote targets) shouldn't attempt to read the entire buffer. | |
3220 | Instead it should read a single packet worth of data and then | |
3221 | return the byte size of that packet to the caller. The caller (its | |
3222 | caller and its callers caller ;-) already contains code for | |
3223 | handling partial reads. */ | |
3224 | ||
c906108c SS |
3225 | static int |
3226 | remote_read_bytes (memaddr, myaddr, len) | |
3227 | CORE_ADDR memaddr; | |
3228 | char *myaddr; | |
3229 | int len; | |
3230 | { | |
085dd6e6 | 3231 | char *buf = alloca (PBUFSIZ); |
c906108c SS |
3232 | int max_buf_size; /* Max size of packet output buffer */ |
3233 | int origlen; | |
3234 | ||
3235 | /* Chop the transfer down if necessary */ | |
3236 | ||
3237 | max_buf_size = min (remote_write_size, PBUFSIZ); | |
3238 | if (remote_register_buf_size != 0) | |
3239 | max_buf_size = min (max_buf_size, remote_register_buf_size); | |
3240 | ||
3241 | origlen = len; | |
3242 | while (len > 0) | |
3243 | { | |
c906108c SS |
3244 | char *p; |
3245 | int todo; | |
3246 | int i; | |
3247 | ||
c5aa993b | 3248 | todo = min (len, max_buf_size / 2); /* num bytes that will fit */ |
c906108c SS |
3249 | |
3250 | /* construct "m"<memaddr>","<len>" */ | |
3251 | /* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */ | |
3252 | memaddr = remote_address_masked (memaddr); | |
3253 | p = buf; | |
3254 | *p++ = 'm'; | |
3255 | p += hexnumstr (p, (ULONGEST) memaddr); | |
3256 | *p++ = ','; | |
3257 | p += hexnumstr (p, (ULONGEST) todo); | |
3258 | *p = '\0'; | |
3259 | ||
3260 | putpkt (buf); | |
3261 | getpkt (buf, 0); | |
3262 | ||
3263 | if (buf[0] == 'E') | |
3264 | { | |
3265 | /* There is no correspondance between what the remote protocol uses | |
3266 | for errors and errno codes. We would like a cleaner way of | |
3267 | representing errors (big enough to include errno codes, bfd_error | |
3268 | codes, and others). But for now just return EIO. */ | |
3269 | errno = EIO; | |
3270 | return 0; | |
3271 | } | |
3272 | ||
c5aa993b JM |
3273 | /* Reply describes memory byte by byte, |
3274 | each byte encoded as two hex characters. */ | |
c906108c SS |
3275 | |
3276 | p = buf; | |
3277 | for (i = 0; i < todo; i++) | |
3278 | { | |
3279 | if (p[0] == 0 || p[1] == 0) | |
3280 | /* Reply is short. This means that we were able to read | |
3281 | only part of what we wanted to. */ | |
3282 | return i + (origlen - len); | |
3283 | myaddr[i] = fromhex (p[0]) * 16 + fromhex (p[1]); | |
3284 | p += 2; | |
3285 | } | |
3286 | myaddr += todo; | |
3287 | memaddr += todo; | |
3288 | len -= todo; | |
3289 | } | |
3290 | return origlen; | |
3291 | } | |
3292 | \f | |
3293 | /* Read or write LEN bytes from inferior memory at MEMADDR, | |
392a587b JM |
3294 | transferring to or from debugger address BUFFER. Write to inferior if |
3295 | SHOULD_WRITE is nonzero. Returns length of data written or read; 0 | |
3296 | for error. */ | |
3297 | ||
3298 | #ifndef REMOTE_TRANSLATE_XFER_ADDRESS | |
3299 | #define REMOTE_TRANSLATE_XFER_ADDRESS(MEM_ADDR, MEM_LEN, TARG_ADDR, TARG_LEN) \ | |
3300 | (*(TARG_ADDR) = (MEM_ADDR), *(TARG_LEN) = (MEM_LEN)) | |
3301 | #endif | |
c906108c SS |
3302 | |
3303 | /* ARGSUSED */ | |
3304 | static int | |
392a587b JM |
3305 | remote_xfer_memory (mem_addr, buffer, mem_len, should_write, target) |
3306 | CORE_ADDR mem_addr; | |
3307 | char *buffer; | |
3308 | int mem_len; | |
c906108c | 3309 | int should_write; |
c5aa993b | 3310 | struct target_ops *target; /* ignored */ |
c906108c | 3311 | { |
392a587b JM |
3312 | CORE_ADDR targ_addr; |
3313 | int targ_len; | |
3314 | REMOTE_TRANSLATE_XFER_ADDRESS (mem_addr, mem_len, &targ_addr, &targ_len); | |
3315 | if (targ_len <= 0) | |
c906108c | 3316 | return 0; |
c906108c | 3317 | |
392a587b JM |
3318 | return dcache_xfer_memory (remote_dcache, targ_addr, buffer, |
3319 | targ_len, should_write); | |
c906108c SS |
3320 | } |
3321 | ||
c5aa993b | 3322 | |
c906108c SS |
3323 | #if 0 |
3324 | /* Enable after 4.12. */ | |
3325 | ||
3326 | void | |
3327 | remote_search (len, data, mask, startaddr, increment, lorange, hirange | |
3328 | addr_found, data_found) | |
3329 | int len; | |
3330 | char *data; | |
3331 | char *mask; | |
3332 | CORE_ADDR startaddr; | |
3333 | int increment; | |
3334 | CORE_ADDR lorange; | |
3335 | CORE_ADDR hirange; | |
3336 | CORE_ADDR *addr_found; | |
3337 | char *data_found; | |
3338 | { | |
3339 | if (increment == -4 && len == 4) | |
3340 | { | |
3341 | long mask_long, data_long; | |
3342 | long data_found_long; | |
3343 | CORE_ADDR addr_we_found; | |
085dd6e6 | 3344 | char *buf = alloca (PBUFSIZ); |
c906108c SS |
3345 | long returned_long[2]; |
3346 | char *p; | |
3347 | ||
3348 | mask_long = extract_unsigned_integer (mask, len); | |
3349 | data_long = extract_unsigned_integer (data, len); | |
3350 | sprintf (buf, "t%x:%x,%x", startaddr, data_long, mask_long); | |
3351 | putpkt (buf); | |
3352 | getpkt (buf, 0); | |
3353 | if (buf[0] == '\0') | |
3354 | { | |
3355 | /* The stub doesn't support the 't' request. We might want to | |
3356 | remember this fact, but on the other hand the stub could be | |
3357 | switched on us. Maybe we should remember it only until | |
3358 | the next "target remote". */ | |
3359 | generic_search (len, data, mask, startaddr, increment, lorange, | |
3360 | hirange, addr_found, data_found); | |
3361 | return; | |
3362 | } | |
3363 | ||
3364 | if (buf[0] == 'E') | |
3365 | /* There is no correspondance between what the remote protocol uses | |
3366 | for errors and errno codes. We would like a cleaner way of | |
3367 | representing errors (big enough to include errno codes, bfd_error | |
3368 | codes, and others). But for now just use EIO. */ | |
3369 | memory_error (EIO, startaddr); | |
3370 | p = buf; | |
3371 | addr_we_found = 0; | |
3372 | while (*p != '\0' && *p != ',') | |
3373 | addr_we_found = (addr_we_found << 4) + fromhex (*p++); | |
3374 | if (*p == '\0') | |
3375 | error ("Protocol error: short return for search"); | |
3376 | ||
3377 | data_found_long = 0; | |
3378 | while (*p != '\0' && *p != ',') | |
3379 | data_found_long = (data_found_long << 4) + fromhex (*p++); | |
3380 | /* Ignore anything after this comma, for future extensions. */ | |
3381 | ||
3382 | if (addr_we_found < lorange || addr_we_found >= hirange) | |
3383 | { | |
3384 | *addr_found = 0; | |
3385 | return; | |
3386 | } | |
3387 | ||
3388 | *addr_found = addr_we_found; | |
3389 | *data_found = store_unsigned_integer (data_we_found, len); | |
3390 | return; | |
3391 | } | |
3392 | generic_search (len, data, mask, startaddr, increment, lorange, | |
3393 | hirange, addr_found, data_found); | |
3394 | } | |
3395 | #endif /* 0 */ | |
3396 | \f | |
3397 | static void | |
3398 | remote_files_info (ignore) | |
3399 | struct target_ops *ignore; | |
3400 | { | |
3401 | puts_filtered ("Debugging a target over a serial line.\n"); | |
3402 | } | |
3403 | \f | |
3404 | /* Stuff for dealing with the packets which are part of this protocol. | |
3405 | See comment at top of file for details. */ | |
3406 | ||
3407 | /* Read a single character from the remote end, masking it down to 7 bits. */ | |
3408 | ||
3409 | static int | |
3410 | readchar (timeout) | |
3411 | int timeout; | |
3412 | { | |
3413 | int ch; | |
3414 | ||
3415 | ch = SERIAL_READCHAR (remote_desc, timeout); | |
3416 | ||
2acceee2 JM |
3417 | if (ch >= 0) |
3418 | return (ch & 0x7f); | |
3419 | ||
3420 | switch ((enum serial_rc) ch) | |
c906108c SS |
3421 | { |
3422 | case SERIAL_EOF: | |
2acceee2 | 3423 | target_mourn_inferior (); |
c906108c | 3424 | error ("Remote connection closed"); |
2acceee2 | 3425 | /* no return */ |
c906108c SS |
3426 | case SERIAL_ERROR: |
3427 | perror_with_name ("Remote communication error"); | |
2acceee2 | 3428 | /* no return */ |
c906108c | 3429 | case SERIAL_TIMEOUT: |
2acceee2 | 3430 | break; |
c906108c | 3431 | } |
2acceee2 | 3432 | return ch; |
c906108c SS |
3433 | } |
3434 | ||
3435 | /* Send the command in BUF to the remote machine, and read the reply | |
3436 | into BUF. Report an error if we get an error reply. */ | |
3437 | ||
3438 | static void | |
3439 | remote_send (buf) | |
3440 | char *buf; | |
3441 | { | |
3442 | putpkt (buf); | |
3443 | getpkt (buf, 0); | |
3444 | ||
3445 | if (buf[0] == 'E') | |
3446 | error ("Remote failure reply: %s", buf); | |
3447 | } | |
3448 | ||
3449 | /* Display a null-terminated packet on stdout, for debugging, using C | |
3450 | string notation. */ | |
3451 | ||
3452 | static void | |
3453 | print_packet (buf) | |
3454 | char *buf; | |
3455 | { | |
3456 | puts_filtered ("\""); | |
43e526b9 | 3457 | fputstr_filtered (buf, '"', gdb_stdout); |
c906108c SS |
3458 | puts_filtered ("\""); |
3459 | } | |
3460 | ||
3461 | int | |
3462 | putpkt (buf) | |
3463 | char *buf; | |
3464 | { | |
3465 | return putpkt_binary (buf, strlen (buf)); | |
3466 | } | |
3467 | ||
3468 | /* Send a packet to the remote machine, with error checking. The data | |
3469 | of the packet is in BUF. The string in BUF can be at most PBUFSIZ - 5 | |
3470 | to account for the $, # and checksum, and for a possible /0 if we are | |
3471 | debugging (remote_debug) and want to print the sent packet as a string */ | |
3472 | ||
3473 | static int | |
3474 | putpkt_binary (buf, cnt) | |
3475 | char *buf; | |
3476 | int cnt; | |
3477 | { | |
3478 | int i; | |
3479 | unsigned char csum = 0; | |
085dd6e6 JM |
3480 | char *buf2 = alloca (PBUFSIZ); |
3481 | char *junkbuf = alloca (PBUFSIZ); | |
3482 | ||
c906108c SS |
3483 | int ch; |
3484 | int tcount = 0; | |
3485 | char *p; | |
3486 | ||
3487 | /* Copy the packet into buffer BUF2, encapsulating it | |
3488 | and giving it a checksum. */ | |
3489 | ||
43ff13b4 | 3490 | if (cnt > BUFSIZ - 5) /* Prosanity check */ |
c906108c SS |
3491 | abort (); |
3492 | ||
3493 | p = buf2; | |
3494 | *p++ = '$'; | |
3495 | ||
3496 | for (i = 0; i < cnt; i++) | |
3497 | { | |
3498 | csum += buf[i]; | |
3499 | *p++ = buf[i]; | |
3500 | } | |
3501 | *p++ = '#'; | |
3502 | *p++ = tohex ((csum >> 4) & 0xf); | |
3503 | *p++ = tohex (csum & 0xf); | |
3504 | ||
3505 | /* Send it over and over until we get a positive ack. */ | |
3506 | ||
3507 | while (1) | |
3508 | { | |
3509 | int started_error_output = 0; | |
3510 | ||
3511 | if (remote_debug) | |
3512 | { | |
3513 | *p = '\0'; | |
43e526b9 JM |
3514 | fprintf_unfiltered (gdb_stdlog, "Sending packet: "); |
3515 | fputstrn_unfiltered (buf2, p - buf2, 0, gdb_stdlog); | |
d4f3574e | 3516 | fprintf_unfiltered (gdb_stdlog, "..."); |
0f71a2f6 | 3517 | gdb_flush (gdb_stdlog); |
c906108c SS |
3518 | } |
3519 | if (SERIAL_WRITE (remote_desc, buf2, p - buf2)) | |
3520 | perror_with_name ("putpkt: write failed"); | |
3521 | ||
3522 | /* read until either a timeout occurs (-2) or '+' is read */ | |
3523 | while (1) | |
3524 | { | |
3525 | ch = readchar (remote_timeout); | |
3526 | ||
c5aa993b | 3527 | if (remote_debug) |
c906108c SS |
3528 | { |
3529 | switch (ch) | |
3530 | { | |
3531 | case '+': | |
3532 | case SERIAL_TIMEOUT: | |
3533 | case '$': | |
3534 | if (started_error_output) | |
3535 | { | |
3536 | putchar_unfiltered ('\n'); | |
3537 | started_error_output = 0; | |
3538 | } | |
3539 | } | |
3540 | } | |
3541 | ||
3542 | switch (ch) | |
3543 | { | |
3544 | case '+': | |
3545 | if (remote_debug) | |
0f71a2f6 | 3546 | fprintf_unfiltered (gdb_stdlog, "Ack\n"); |
c906108c SS |
3547 | return 1; |
3548 | case SERIAL_TIMEOUT: | |
c5aa993b | 3549 | tcount++; |
c906108c SS |
3550 | if (tcount > 3) |
3551 | return 0; | |
3552 | break; /* Retransmit buffer */ | |
3553 | case '$': | |
3554 | { | |
c5aa993b JM |
3555 | /* It's probably an old response, and we're out of sync. |
3556 | Just gobble up the packet and ignore it. */ | |
c906108c | 3557 | getpkt (junkbuf, 0); |
c5aa993b | 3558 | continue; /* Now, go look for + */ |
c906108c SS |
3559 | } |
3560 | default: | |
3561 | if (remote_debug) | |
3562 | { | |
3563 | if (!started_error_output) | |
3564 | { | |
3565 | started_error_output = 1; | |
0f71a2f6 | 3566 | fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: "); |
c906108c | 3567 | } |
0f71a2f6 | 3568 | fputc_unfiltered (ch & 0177, gdb_stdlog); |
c906108c SS |
3569 | } |
3570 | continue; | |
3571 | } | |
3572 | break; /* Here to retransmit */ | |
3573 | } | |
3574 | ||
3575 | #if 0 | |
3576 | /* This is wrong. If doing a long backtrace, the user should be | |
c5aa993b JM |
3577 | able to get out next time we call QUIT, without anything as |
3578 | violent as interrupt_query. If we want to provide a way out of | |
3579 | here without getting to the next QUIT, it should be based on | |
3580 | hitting ^C twice as in remote_wait. */ | |
c906108c SS |
3581 | if (quit_flag) |
3582 | { | |
3583 | quit_flag = 0; | |
3584 | interrupt_query (); | |
3585 | } | |
3586 | #endif | |
3587 | } | |
3588 | } | |
3589 | ||
0f71a2f6 JM |
3590 | static int remote_cisco_mode; |
3591 | ||
c906108c SS |
3592 | /* Come here after finding the start of the frame. Collect the rest |
3593 | into BUF, verifying the checksum, length, and handling run-length | |
3594 | compression. Returns 0 on any error, 1 on success. */ | |
3595 | ||
3596 | static int | |
3597 | read_frame (buf) | |
3598 | char *buf; | |
3599 | { | |
3600 | unsigned char csum; | |
3601 | char *bp; | |
3602 | int c; | |
3603 | ||
3604 | csum = 0; | |
3605 | bp = buf; | |
3606 | ||
3607 | while (1) | |
3608 | { | |
3609 | c = readchar (remote_timeout); | |
3610 | ||
3611 | switch (c) | |
3612 | { | |
3613 | case SERIAL_TIMEOUT: | |
3614 | if (remote_debug) | |
0f71a2f6 | 3615 | fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog); |
c906108c SS |
3616 | return 0; |
3617 | case '$': | |
3618 | if (remote_debug) | |
0f71a2f6 JM |
3619 | fputs_filtered ("Saw new packet start in middle of old one\n", |
3620 | gdb_stdlog); | |
c906108c SS |
3621 | return 0; /* Start a new packet, count retries */ |
3622 | case '#': | |
3623 | { | |
3624 | unsigned char pktcsum; | |
3625 | ||
3626 | *bp = '\000'; | |
3627 | ||
3628 | pktcsum = fromhex (readchar (remote_timeout)) << 4; | |
3629 | pktcsum |= fromhex (readchar (remote_timeout)); | |
3630 | ||
3631 | if (csum == pktcsum) | |
c2c6d25f | 3632 | return 1; |
c906108c | 3633 | |
c5aa993b | 3634 | if (remote_debug) |
c906108c | 3635 | { |
0f71a2f6 | 3636 | fprintf_filtered (gdb_stdlog, |
c5aa993b | 3637 | "Bad checksum, sentsum=0x%x, csum=0x%x, buf=", |
0f71a2f6 JM |
3638 | pktcsum, csum); |
3639 | fputs_filtered (buf, gdb_stdlog); | |
3640 | fputs_filtered ("\n", gdb_stdlog); | |
c906108c SS |
3641 | } |
3642 | return 0; | |
3643 | } | |
3644 | case '*': /* Run length encoding */ | |
c2c6d25f JM |
3645 | { |
3646 | int repeat; | |
3647 | csum += c; | |
c906108c | 3648 | |
c2c6d25f JM |
3649 | if (remote_cisco_mode == 0) |
3650 | { | |
3651 | c = readchar (remote_timeout); | |
3652 | csum += c; | |
3653 | repeat = c - ' ' + 3; /* Compute repeat count */ | |
3654 | } | |
3655 | else | |
3656 | { | |
3657 | /* Cisco's run-length encoding variant uses two | |
3658 | hex chars to represent the repeat count. */ | |
3659 | ||
3660 | c = readchar (remote_timeout); | |
3661 | csum += c; | |
3662 | repeat = fromhex (c) << 4; | |
3663 | c = readchar (remote_timeout); | |
3664 | csum += c; | |
3665 | repeat += fromhex (c); | |
3666 | } | |
c906108c | 3667 | |
c2c6d25f JM |
3668 | if (repeat > 0 && repeat <= 255 |
3669 | && bp + repeat - 1 < buf + PBUFSIZ - 1) | |
3670 | { | |
3671 | memset (bp, *(bp - 1), repeat); | |
3672 | bp += c; | |
3673 | continue; | |
3674 | } | |
3675 | ||
3676 | *bp = '\0'; | |
3677 | printf_filtered ("Repeat count %d too large for buffer: ", repeat); | |
3678 | puts_filtered (buf); | |
3679 | puts_filtered ("\n"); | |
3680 | return 0; | |
3681 | } | |
c906108c SS |
3682 | default: |
3683 | if (bp < buf + PBUFSIZ - 1) | |
3684 | { | |
3685 | *bp++ = c; | |
3686 | csum += c; | |
3687 | continue; | |
3688 | } | |
3689 | ||
3690 | *bp = '\0'; | |
3691 | puts_filtered ("Remote packet too long: "); | |
3692 | puts_filtered (buf); | |
3693 | puts_filtered ("\n"); | |
3694 | ||
3695 | return 0; | |
3696 | } | |
3697 | } | |
3698 | } | |
3699 | ||
3700 | /* Read a packet from the remote machine, with error checking, and | |
3701 | store it in BUF. BUF is expected to be of size PBUFSIZ. If | |
3702 | FOREVER, wait forever rather than timing out; this is used while | |
3703 | the target is executing user code. */ | |
3704 | ||
3705 | void | |
3706 | getpkt (buf, forever) | |
3707 | char *buf; | |
3708 | int forever; | |
3709 | { | |
3710 | int c; | |
3711 | int tries; | |
3712 | int timeout; | |
3713 | int val; | |
3714 | ||
c5aa993b | 3715 | strcpy (buf, "timeout"); |
c906108c SS |
3716 | |
3717 | if (forever) | |
3718 | { | |
c906108c | 3719 | timeout = watchdog > 0 ? watchdog : -1; |
c906108c SS |
3720 | } |
3721 | ||
3722 | else | |
3723 | timeout = remote_timeout; | |
3724 | ||
3725 | #define MAX_TRIES 3 | |
3726 | ||
3727 | for (tries = 1; tries <= MAX_TRIES; tries++) | |
3728 | { | |
3729 | /* This can loop forever if the remote side sends us characters | |
c5aa993b JM |
3730 | continuously, but if it pauses, we'll get a zero from readchar |
3731 | because of timeout. Then we'll count that as a retry. */ | |
c906108c SS |
3732 | |
3733 | /* Note that we will only wait forever prior to the start of a packet. | |
c5aa993b JM |
3734 | After that, we expect characters to arrive at a brisk pace. They |
3735 | should show up within remote_timeout intervals. */ | |
c906108c SS |
3736 | |
3737 | do | |
3738 | { | |
3739 | c = readchar (timeout); | |
3740 | ||
3741 | if (c == SERIAL_TIMEOUT) | |
3742 | { | |
2acceee2 | 3743 | if (forever) /* Watchdog went off? Kill the target. */ |
c906108c | 3744 | { |
2acceee2 | 3745 | QUIT; |
c906108c SS |
3746 | target_mourn_inferior (); |
3747 | error ("Watchdog has expired. Target detached.\n"); | |
3748 | } | |
c906108c | 3749 | if (remote_debug) |
0f71a2f6 | 3750 | fputs_filtered ("Timed out.\n", gdb_stdlog); |
c906108c SS |
3751 | goto retry; |
3752 | } | |
3753 | } | |
3754 | while (c != '$'); | |
3755 | ||
3756 | /* We've found the start of a packet, now collect the data. */ | |
3757 | ||
3758 | val = read_frame (buf); | |
3759 | ||
3760 | if (val == 1) | |
3761 | { | |
3762 | if (remote_debug) | |
43e526b9 JM |
3763 | { |
3764 | fprintf_unfiltered (gdb_stdlog, "Packet received: "); | |
3765 | fputstr_unfiltered (buf, 0, gdb_stdlog); | |
3766 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
3767 | } | |
c906108c SS |
3768 | SERIAL_WRITE (remote_desc, "+", 1); |
3769 | return; | |
3770 | } | |
3771 | ||
3772 | /* Try the whole thing again. */ | |
3773 | retry: | |
3774 | SERIAL_WRITE (remote_desc, "-", 1); | |
3775 | } | |
3776 | ||
3777 | /* We have tried hard enough, and just can't receive the packet. Give up. */ | |
3778 | ||
3779 | printf_unfiltered ("Ignoring packet error, continuing...\n"); | |
3780 | SERIAL_WRITE (remote_desc, "+", 1); | |
3781 | } | |
3782 | \f | |
3783 | static void | |
3784 | remote_kill () | |
3785 | { | |
3786 | /* For some mysterious reason, wait_for_inferior calls kill instead of | |
3787 | mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */ | |
3788 | if (kill_kludge) | |
3789 | { | |
3790 | kill_kludge = 0; | |
3791 | target_mourn_inferior (); | |
3792 | return; | |
3793 | } | |
3794 | ||
3795 | /* Use catch_errors so the user can quit from gdb even when we aren't on | |
3796 | speaking terms with the remote system. */ | |
c5aa993b | 3797 | catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR); |
c906108c SS |
3798 | |
3799 | /* Don't wait for it to die. I'm not really sure it matters whether | |
3800 | we do or not. For the existing stubs, kill is a noop. */ | |
3801 | target_mourn_inferior (); | |
3802 | } | |
3803 | ||
43ff13b4 JM |
3804 | /* Async version of remote_kill. */ |
3805 | static void | |
3806 | remote_async_kill () | |
3807 | { | |
3808 | /* Unregister the file descriptor from the event loop. */ | |
c2c6d25f JM |
3809 | if (SERIAL_IS_ASYNC_P (remote_desc)) |
3810 | SERIAL_ASYNC (remote_desc, NULL, 0); | |
43ff13b4 JM |
3811 | |
3812 | /* For some mysterious reason, wait_for_inferior calls kill instead of | |
3813 | mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */ | |
3814 | if (kill_kludge) | |
3815 | { | |
3816 | kill_kludge = 0; | |
3817 | target_mourn_inferior (); | |
3818 | return; | |
3819 | } | |
3820 | ||
3821 | /* Use catch_errors so the user can quit from gdb even when we aren't on | |
3822 | speaking terms with the remote system. */ | |
c5aa993b | 3823 | catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR); |
43ff13b4 JM |
3824 | |
3825 | /* Don't wait for it to die. I'm not really sure it matters whether | |
3826 | we do or not. For the existing stubs, kill is a noop. */ | |
3827 | target_mourn_inferior (); | |
3828 | } | |
3829 | ||
c906108c SS |
3830 | static void |
3831 | remote_mourn () | |
3832 | { | |
3833 | remote_mourn_1 (&remote_ops); | |
3834 | } | |
3835 | ||
53a5351d JM |
3836 | static void |
3837 | remote_async_mourn () | |
3838 | { | |
3839 | remote_mourn_1 (&remote_async_ops); | |
3840 | } | |
3841 | ||
c906108c SS |
3842 | static void |
3843 | extended_remote_mourn () | |
3844 | { | |
3845 | /* We do _not_ want to mourn the target like this; this will | |
3846 | remove the extended remote target from the target stack, | |
3847 | and the next time the user says "run" it'll fail. | |
3848 | ||
3849 | FIXME: What is the right thing to do here? */ | |
3850 | #if 0 | |
3851 | remote_mourn_1 (&extended_remote_ops); | |
3852 | #endif | |
3853 | } | |
3854 | ||
3855 | /* Worker function for remote_mourn. */ | |
3856 | static void | |
3857 | remote_mourn_1 (target) | |
3858 | struct target_ops *target; | |
3859 | { | |
3860 | unpush_target (target); | |
3861 | generic_mourn_inferior (); | |
3862 | } | |
3863 | ||
3864 | /* In the extended protocol we want to be able to do things like | |
3865 | "run" and have them basically work as expected. So we need | |
3866 | a special create_inferior function. | |
3867 | ||
3868 | FIXME: One day add support for changing the exec file | |
3869 | we're debugging, arguments and an environment. */ | |
3870 | ||
3871 | static void | |
3872 | extended_remote_create_inferior (exec_file, args, env) | |
3873 | char *exec_file; | |
3874 | char *args; | |
3875 | char **env; | |
3876 | { | |
3877 | /* Rip out the breakpoints; we'll reinsert them after restarting | |
3878 | the remote server. */ | |
3879 | remove_breakpoints (); | |
3880 | ||
3881 | /* Now restart the remote server. */ | |
3882 | extended_remote_restart (); | |
3883 | ||
3884 | /* Now put the breakpoints back in. This way we're safe if the | |
3885 | restart function works via a unix fork on the remote side. */ | |
3886 | insert_breakpoints (); | |
3887 | ||
3888 | /* Clean up from the last time we were running. */ | |
3889 | clear_proceed_status (); | |
3890 | ||
3891 | /* Let the remote process run. */ | |
3892 | proceed (-1, TARGET_SIGNAL_0, 0); | |
3893 | } | |
3894 | ||
43ff13b4 JM |
3895 | /* Async version of extended_remote_create_inferior. */ |
3896 | static void | |
3897 | extended_remote_async_create_inferior (exec_file, args, env) | |
3898 | char *exec_file; | |
3899 | char *args; | |
3900 | char **env; | |
3901 | { | |
3902 | /* Rip out the breakpoints; we'll reinsert them after restarting | |
3903 | the remote server. */ | |
3904 | remove_breakpoints (); | |
3905 | ||
3906 | /* If running asynchronously, register the target file descriptor | |
3907 | with the event loop. */ | |
2acceee2 JM |
3908 | if (event_loop_p && target_can_async_p ()) |
3909 | target_async (inferior_event_handler, 0); | |
43ff13b4 JM |
3910 | |
3911 | /* Now restart the remote server. */ | |
3912 | extended_remote_restart (); | |
3913 | ||
3914 | /* Now put the breakpoints back in. This way we're safe if the | |
3915 | restart function works via a unix fork on the remote side. */ | |
3916 | insert_breakpoints (); | |
3917 | ||
3918 | /* Clean up from the last time we were running. */ | |
3919 | clear_proceed_status (); | |
3920 | ||
3921 | /* Let the remote process run. */ | |
3922 | proceed (-1, TARGET_SIGNAL_0, 0); | |
3923 | } | |
c906108c | 3924 | \f |
c5aa993b | 3925 | |
c906108c SS |
3926 | /* On some machines, e.g. 68k, we may use a different breakpoint instruction |
3927 | than other targets; in those use REMOTE_BREAKPOINT instead of just | |
3928 | BREAKPOINT. Also, bi-endian targets may define LITTLE_REMOTE_BREAKPOINT | |
3929 | and BIG_REMOTE_BREAKPOINT. If none of these are defined, we just call | |
3930 | the standard routines that are in mem-break.c. */ | |
3931 | ||
3932 | /* FIXME, these ought to be done in a more dynamic fashion. For instance, | |
3933 | the choice of breakpoint instruction affects target program design and | |
3934 | vice versa, and by making it user-tweakable, the special code here | |
3935 | goes away and we need fewer special GDB configurations. */ | |
3936 | ||
3937 | #if defined (LITTLE_REMOTE_BREAKPOINT) && defined (BIG_REMOTE_BREAKPOINT) && !defined(REMOTE_BREAKPOINT) | |
3938 | #define REMOTE_BREAKPOINT | |
3939 | #endif | |
3940 | ||
3941 | #ifdef REMOTE_BREAKPOINT | |
3942 | ||
3943 | /* If the target isn't bi-endian, just pretend it is. */ | |
3944 | #if !defined (LITTLE_REMOTE_BREAKPOINT) && !defined (BIG_REMOTE_BREAKPOINT) | |
3945 | #define LITTLE_REMOTE_BREAKPOINT REMOTE_BREAKPOINT | |
3946 | #define BIG_REMOTE_BREAKPOINT REMOTE_BREAKPOINT | |
3947 | #endif | |
3948 | ||
3949 | static unsigned char big_break_insn[] = BIG_REMOTE_BREAKPOINT; | |
3950 | static unsigned char little_break_insn[] = LITTLE_REMOTE_BREAKPOINT; | |
3951 | ||
3952 | #endif /* REMOTE_BREAKPOINT */ | |
3953 | ||
3954 | /* Insert a breakpoint on targets that don't have any better breakpoint | |
3955 | support. We read the contents of the target location and stash it, | |
3956 | then overwrite it with a breakpoint instruction. ADDR is the target | |
3957 | location in the target machine. CONTENTS_CACHE is a pointer to | |
3958 | memory allocated for saving the target contents. It is guaranteed | |
3959 | by the caller to be long enough to save sizeof BREAKPOINT bytes (this | |
3960 | is accomplished via BREAKPOINT_MAX). */ | |
3961 | ||
3962 | static int | |
3963 | remote_insert_breakpoint (addr, contents_cache) | |
3964 | CORE_ADDR addr; | |
3965 | char *contents_cache; | |
3966 | { | |
3967 | #ifdef REMOTE_BREAKPOINT | |
3968 | int val; | |
96baa820 JM |
3969 | #endif |
3970 | int bp_size; | |
3971 | ||
3972 | /* Try the "Z" packet if it is not already disabled. | |
3973 | If it succeeds, then set the support to PACKET_ENABLE. | |
3974 | If it fails, and the user has explicitly requested the Z support | |
3975 | then report an error, otherwise, mark it disabled and go on. */ | |
3976 | ||
3977 | if ((remote_protocol_Z.support == PACKET_ENABLE) | |
3978 | || (remote_protocol_Z.support == PACKET_SUPPORT_UNKNOWN)) | |
3979 | { | |
3980 | char buf[PBUFSIZ], *p = buf; | |
3981 | ||
3982 | addr = remote_address_masked (addr); | |
3983 | *(p++) = 'Z'; | |
3984 | *(p++) = '0'; | |
3985 | *(p++) = ','; | |
3986 | p += hexnumstr (p, (ULONGEST) addr); | |
3987 | BREAKPOINT_FROM_PC (&addr, &bp_size); | |
3988 | sprintf (p, ",%d", bp_size); | |
3989 | ||
3990 | putpkt (buf); | |
3991 | getpkt (buf, 0); | |
3992 | ||
3993 | if (buf[0] != '\0') | |
3994 | { | |
3995 | remote_protocol_Z.support = PACKET_ENABLE; | |
3996 | return (buf[0] == 'E'); | |
3997 | } | |
3998 | ||
3999 | /* The stub does not support the 'Z' request. If the user has | |
4000 | explicitly requested the Z support, or if the stub previously | |
4001 | said it supported the packet, this is an error, | |
4002 | otherwise, mark it disabled. */ | |
4003 | ||
4004 | else if (remote_protocol_Z.support == PACKET_ENABLE) | |
4005 | { | |
4006 | error ("Protocol error: Z packet not recognized by stub"); | |
4007 | } | |
4008 | else | |
4009 | { | |
4010 | remote_protocol_Z.support = PACKET_DISABLE; | |
4011 | } | |
4012 | } | |
c906108c | 4013 | |
96baa820 | 4014 | #ifdef REMOTE_BREAKPOINT |
c906108c SS |
4015 | val = target_read_memory (addr, contents_cache, sizeof big_break_insn); |
4016 | ||
4017 | if (val == 0) | |
4018 | { | |
4019 | if (TARGET_BYTE_ORDER == BIG_ENDIAN) | |
4020 | val = target_write_memory (addr, (char *) big_break_insn, | |
4021 | sizeof big_break_insn); | |
4022 | else | |
4023 | val = target_write_memory (addr, (char *) little_break_insn, | |
4024 | sizeof little_break_insn); | |
4025 | } | |
4026 | ||
4027 | return val; | |
4028 | #else | |
4029 | return memory_insert_breakpoint (addr, contents_cache); | |
4030 | #endif /* REMOTE_BREAKPOINT */ | |
4031 | } | |
4032 | ||
4033 | static int | |
4034 | remote_remove_breakpoint (addr, contents_cache) | |
4035 | CORE_ADDR addr; | |
4036 | char *contents_cache; | |
4037 | { | |
96baa820 JM |
4038 | int bp_size; |
4039 | ||
4040 | if ((remote_protocol_Z.support == PACKET_ENABLE) | |
4041 | || (remote_protocol_Z.support == PACKET_SUPPORT_UNKNOWN)) | |
4042 | { | |
4043 | char buf[PBUFSIZ], *p = buf; | |
4044 | ||
4045 | *(p++) = 'z'; | |
4046 | *(p++) = '0'; | |
4047 | *(p++) = ','; | |
4048 | ||
4049 | addr = remote_address_masked (addr); | |
4050 | p += hexnumstr (p, (ULONGEST) addr); | |
4051 | BREAKPOINT_FROM_PC (&addr, &bp_size); | |
4052 | sprintf (p, ",%d", bp_size); | |
4053 | ||
4054 | putpkt (buf); | |
4055 | getpkt (buf, 0); | |
4056 | ||
4057 | return (buf[0] == 'E'); | |
4058 | } | |
4059 | ||
c906108c SS |
4060 | #ifdef REMOTE_BREAKPOINT |
4061 | return target_write_memory (addr, contents_cache, sizeof big_break_insn); | |
4062 | #else | |
4063 | return memory_remove_breakpoint (addr, contents_cache); | |
4064 | #endif /* REMOTE_BREAKPOINT */ | |
4065 | } | |
4066 | ||
96baa820 JM |
4067 | #ifdef TARGET_HAS_HARDWARE_WATCHPOINTS |
4068 | int | |
4069 | remote_insert_watchpoint (addr, len, type) | |
4070 | CORE_ADDR addr; | |
4071 | int len; | |
4072 | int type; | |
4073 | { | |
4074 | char buf[PBUFSIZ], *p; | |
4075 | ||
4076 | if (remote_protocol_Z.support == PACKET_DISABLE) | |
4077 | error ("Can't set hardware watchpoints without the 'Z' packet\n"); | |
4078 | ||
4079 | sprintf (buf, "Z%x,", type + 2 ); | |
4080 | p = strchr (buf, '\0'); | |
4081 | addr = remote_address_masked (addr); | |
4082 | p += hexnumstr (p, (ULONGEST) addr); | |
d4f3574e | 4083 | sprintf (p, ",%x", len); |
96baa820 JM |
4084 | |
4085 | putpkt (buf); | |
4086 | getpkt (buf, 0); | |
4087 | ||
4088 | if (buf[0] == '\0' || buf [0] == 'E') | |
4089 | return -1; | |
4090 | ||
4091 | return 0; | |
4092 | } | |
4093 | ||
4094 | int | |
4095 | remote_remove_watchpoint (addr, len, type) | |
4096 | CORE_ADDR addr; | |
4097 | int len; | |
4098 | int type; | |
4099 | { | |
4100 | char buf[PBUFSIZ], *p; | |
4101 | ||
4102 | sprintf (buf, "z%x,", type + 2 ); | |
4103 | p = strchr (buf, '\0'); | |
4104 | addr = remote_address_masked (addr); | |
4105 | p += hexnumstr (p, (ULONGEST) addr); | |
d4f3574e | 4106 | sprintf (p, ",%x", len); |
96baa820 JM |
4107 | putpkt (buf); |
4108 | getpkt (buf, 0); | |
4109 | ||
4110 | if (buf[0] == '\0' || buf [0] == 'E') | |
4111 | return -1; | |
4112 | ||
4113 | return 0; | |
4114 | } | |
4115 | ||
4116 | int | |
4117 | remote_insert_hw_breakpoint (addr, len) | |
4118 | CORE_ADDR addr; | |
4119 | int len; | |
4120 | { | |
4121 | char buf[PBUFSIZ], *p = buf; | |
4122 | ||
4123 | if (remote_protocol_Z.support == PACKET_DISABLE) | |
4124 | error ("Can't set hardware breakpoints without the 'Z' packet\n"); | |
4125 | ||
4126 | *(p++) = 'Z'; | |
4127 | *(p++) = '1'; | |
4128 | *(p++) = ','; | |
4129 | ||
4130 | addr = remote_address_masked (addr); | |
4131 | p += hexnumstr (p, (ULONGEST) addr); | |
4132 | *p = '\0'; | |
4133 | ||
4134 | putpkt (buf); | |
4135 | getpkt (buf, 0); | |
4136 | ||
4137 | if (buf[0] == '\0' || buf [0] == 'E') | |
4138 | return -1; | |
4139 | ||
4140 | return 0; | |
4141 | } | |
4142 | ||
4143 | int | |
4144 | remote_remove_hw_breakpoint (addr, len) | |
4145 | CORE_ADDR addr; | |
4146 | int len; | |
4147 | { | |
4148 | char buf[PBUFSIZ], *p = buf; | |
4149 | ||
4150 | *(p++) = 'z'; | |
4151 | *(p++) = '1'; | |
4152 | *(p++) = ','; | |
4153 | ||
4154 | addr = remote_address_masked (addr); | |
4155 | p += hexnumstr (p, (ULONGEST) addr); | |
4156 | *p = '\0'; | |
4157 | ||
4158 | putpkt(buf); | |
4159 | getpkt (buf, 0); | |
4160 | ||
4161 | if (buf[0] == '\0' || buf [0] == 'E') | |
4162 | return -1; | |
4163 | ||
4164 | return 0; | |
4165 | } | |
4166 | #endif | |
4167 | ||
c906108c SS |
4168 | /* Some targets are only capable of doing downloads, and afterwards |
4169 | they switch to the remote serial protocol. This function provides | |
4170 | a clean way to get from the download target to the remote target. | |
4171 | It's basically just a wrapper so that we don't have to expose any | |
4172 | of the internal workings of remote.c. | |
4173 | ||
4174 | Prior to calling this routine, you should shutdown the current | |
4175 | target code, else you will get the "A program is being debugged | |
4176 | already..." message. Usually a call to pop_target() suffices. */ | |
4177 | ||
4178 | void | |
4179 | push_remote_target (name, from_tty) | |
4180 | char *name; | |
4181 | int from_tty; | |
4182 | { | |
4183 | printf_filtered ("Switching to remote protocol\n"); | |
4184 | remote_open (name, from_tty); | |
4185 | } | |
4186 | ||
4187 | /* Other targets want to use the entire remote serial module but with | |
4188 | certain remote_ops overridden. */ | |
4189 | ||
4190 | void | |
4191 | open_remote_target (name, from_tty, target, extended_p) | |
4192 | char *name; | |
4193 | int from_tty; | |
4194 | struct target_ops *target; | |
4195 | int extended_p; | |
4196 | { | |
4197 | printf_filtered ("Selecting the %sremote protocol\n", | |
4198 | (extended_p ? "extended-" : "")); | |
4199 | remote_open_1 (name, from_tty, target, extended_p); | |
4200 | } | |
4201 | ||
4202 | /* Table used by the crc32 function to calcuate the checksum. */ | |
4203 | ||
c5aa993b JM |
4204 | static unsigned long crc32_table[256] = |
4205 | {0, 0}; | |
c906108c SS |
4206 | |
4207 | static unsigned long | |
4208 | crc32 (buf, len, crc) | |
4209 | unsigned char *buf; | |
4210 | int len; | |
4211 | unsigned int crc; | |
4212 | { | |
c5aa993b | 4213 | if (!crc32_table[1]) |
c906108c SS |
4214 | { |
4215 | /* Initialize the CRC table and the decoding table. */ | |
4216 | int i, j; | |
4217 | unsigned int c; | |
4218 | ||
4219 | for (i = 0; i < 256; i++) | |
c5aa993b JM |
4220 | { |
4221 | for (c = i << 24, j = 8; j > 0; --j) | |
4222 | c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1); | |
4223 | crc32_table[i] = c; | |
4224 | } | |
c906108c SS |
4225 | } |
4226 | ||
4227 | while (len--) | |
4228 | { | |
4229 | crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255]; | |
4230 | buf++; | |
4231 | } | |
4232 | return crc; | |
4233 | } | |
4234 | ||
4235 | /* compare-sections command | |
4236 | ||
4237 | With no arguments, compares each loadable section in the exec bfd | |
4238 | with the same memory range on the target, and reports mismatches. | |
4239 | Useful for verifying the image on the target against the exec file. | |
4240 | Depends on the target understanding the new "qCRC:" request. */ | |
4241 | ||
4242 | static void | |
4243 | compare_sections_command (args, from_tty) | |
4244 | char *args; | |
4245 | int from_tty; | |
4246 | { | |
4247 | asection *s; | |
4248 | unsigned long host_crc, target_crc; | |
4249 | extern bfd *exec_bfd; | |
4250 | struct cleanup *old_chain; | |
085dd6e6 JM |
4251 | char *tmp; |
4252 | char *sectdata; | |
4253 | char *sectname; | |
4254 | char *buf = alloca (PBUFSIZ); | |
c906108c SS |
4255 | bfd_size_type size; |
4256 | bfd_vma lma; | |
4257 | int matched = 0; | |
4258 | int mismatched = 0; | |
4259 | ||
4260 | if (!exec_bfd) | |
4261 | error ("command cannot be used without an exec file"); | |
4262 | if (!current_target.to_shortname || | |
4263 | strcmp (current_target.to_shortname, "remote") != 0) | |
4264 | error ("command can only be used with remote target"); | |
4265 | ||
c5aa993b | 4266 | for (s = exec_bfd->sections; s; s = s->next) |
c906108c SS |
4267 | { |
4268 | if (!(s->flags & SEC_LOAD)) | |
c5aa993b | 4269 | continue; /* skip non-loadable section */ |
c906108c SS |
4270 | |
4271 | size = bfd_get_section_size_before_reloc (s); | |
4272 | if (size == 0) | |
c5aa993b | 4273 | continue; /* skip zero-length section */ |
c906108c SS |
4274 | |
4275 | sectname = (char *) bfd_get_section_name (exec_bfd, s); | |
4276 | if (args && strcmp (args, sectname) != 0) | |
c5aa993b | 4277 | continue; /* not the section selected by user */ |
c906108c | 4278 | |
c5aa993b | 4279 | matched = 1; /* do this section */ |
c906108c SS |
4280 | lma = s->lma; |
4281 | /* FIXME: assumes lma can fit into long */ | |
4282 | sprintf (buf, "qCRC:%lx,%lx", (long) lma, (long) size); | |
4283 | putpkt (buf); | |
4284 | ||
4285 | /* be clever; compute the host_crc before waiting for target reply */ | |
4286 | sectdata = xmalloc (size); | |
4287 | old_chain = make_cleanup (free, sectdata); | |
4288 | bfd_get_section_contents (exec_bfd, s, sectdata, 0, size); | |
4289 | host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff); | |
4290 | ||
4291 | getpkt (buf, 0); | |
4292 | if (buf[0] == 'E') | |
4293 | error ("target memory fault, section %s, range 0x%08x -- 0x%08x", | |
4294 | sectname, lma, lma + size); | |
4295 | if (buf[0] != 'C') | |
4296 | error ("remote target does not support this operation"); | |
4297 | ||
4298 | for (target_crc = 0, tmp = &buf[1]; *tmp; tmp++) | |
4299 | target_crc = target_crc * 16 + fromhex (*tmp); | |
4300 | ||
d4f3574e SS |
4301 | printf_filtered ("Section %s, range 0x%s -- 0x%s: ", |
4302 | sectname, paddr (lma), paddr (lma + size)); | |
c906108c SS |
4303 | if (host_crc == target_crc) |
4304 | printf_filtered ("matched.\n"); | |
4305 | else | |
c5aa993b JM |
4306 | { |
4307 | printf_filtered ("MIS-MATCHED!\n"); | |
4308 | mismatched++; | |
4309 | } | |
c906108c SS |
4310 | |
4311 | do_cleanups (old_chain); | |
4312 | } | |
4313 | if (mismatched > 0) | |
4314 | warning ("One or more sections of the remote executable does not match\n\ | |
4315 | the loaded file\n"); | |
4316 | if (args && !matched) | |
4317 | printf_filtered ("No loaded section named '%s'.\n", args); | |
4318 | } | |
4319 | ||
4320 | static int | |
4321 | remote_query (query_type, buf, outbuf, bufsiz) | |
4322 | int query_type; | |
4323 | char *buf; | |
4324 | char *outbuf; | |
4325 | int *bufsiz; | |
4326 | { | |
4327 | int i; | |
085dd6e6 | 4328 | char *buf2 = alloca (PBUFSIZ); |
c906108c | 4329 | char *p2 = &buf2[0]; |
c906108c | 4330 | |
c5aa993b | 4331 | if (!bufsiz) |
c906108c SS |
4332 | error ("null pointer to remote bufer size specified"); |
4333 | ||
cce74817 | 4334 | /* minimum outbuf size is PBUFSIZ - if bufsiz is not large enough let |
c906108c SS |
4335 | the caller know and return what the minimum size is */ |
4336 | /* Note: a zero bufsiz can be used to query the minimum buffer size */ | |
c5aa993b | 4337 | if (*bufsiz < PBUFSIZ) |
c906108c SS |
4338 | { |
4339 | *bufsiz = PBUFSIZ; | |
4340 | return -1; | |
4341 | } | |
4342 | ||
4343 | /* except for querying the minimum buffer size, target must be open */ | |
c5aa993b | 4344 | if (!remote_desc) |
c906108c SS |
4345 | error ("remote query is only available after target open"); |
4346 | ||
4347 | /* we only take uppercase letters as query types, at least for now */ | |
c5aa993b | 4348 | if ((query_type < 'A') || (query_type > 'Z')) |
c906108c SS |
4349 | error ("invalid remote query type"); |
4350 | ||
c5aa993b | 4351 | if (!buf) |
c906108c SS |
4352 | error ("null remote query specified"); |
4353 | ||
c5aa993b | 4354 | if (!outbuf) |
c906108c SS |
4355 | error ("remote query requires a buffer to receive data"); |
4356 | ||
4357 | outbuf[0] = '\0'; | |
4358 | ||
4359 | *p2++ = 'q'; | |
4360 | *p2++ = query_type; | |
4361 | ||
4362 | /* we used one buffer char for the remote protocol q command and another | |
4363 | for the query type. As the remote protocol encapsulation uses 4 chars | |
4364 | plus one extra in case we are debugging (remote_debug), | |
4365 | we have PBUFZIZ - 7 left to pack the query string */ | |
4366 | i = 0; | |
c5aa993b | 4367 | while (buf[i] && (i < (PBUFSIZ - 8))) |
c906108c SS |
4368 | { |
4369 | /* bad caller may have sent forbidden characters */ | |
c5aa993b JM |
4370 | if ((!isprint (buf[i])) || (buf[i] == '$') || (buf[i] == '#')) |
4371 | error ("illegal characters in query string"); | |
c906108c SS |
4372 | |
4373 | *p2++ = buf[i]; | |
4374 | i++; | |
4375 | } | |
4376 | *p2 = buf[i]; | |
4377 | ||
c5aa993b | 4378 | if (buf[i]) |
c906108c SS |
4379 | error ("query larger than available buffer"); |
4380 | ||
4381 | i = putpkt (buf2); | |
c5aa993b JM |
4382 | if (i < 0) |
4383 | return i; | |
c906108c SS |
4384 | |
4385 | getpkt (outbuf, 0); | |
4386 | ||
4387 | return 0; | |
4388 | } | |
4389 | ||
96baa820 JM |
4390 | static void |
4391 | remote_rcmd (char *command, | |
4392 | struct gdb_file *outbuf) | |
4393 | { | |
4394 | int i; | |
4395 | char *buf = alloca (PBUFSIZ); | |
4396 | char *p = buf; | |
4397 | ||
4398 | if (!remote_desc) | |
4399 | error ("remote rcmd is only available after target open"); | |
4400 | ||
7be570e7 JM |
4401 | /* Send a NULL command across as an empty command */ |
4402 | if (command == NULL) | |
4403 | command = ""; | |
4404 | ||
96baa820 JM |
4405 | /* The query prefix */ |
4406 | strcpy (buf, "qRcmd,"); | |
4407 | p = strchr (buf, '\0'); | |
4408 | ||
4409 | if ((strlen (buf) + strlen (command) * 2 + 8/*misc*/) > PBUFSIZ) | |
4410 | error ("\"monitor\" command ``%s'' is too long\n", command); | |
4411 | ||
4412 | /* Encode the actual command */ | |
4413 | for (i = 0; command[i]; i++) | |
4414 | { | |
4415 | *p++ = tohex ((command[i] >> 4) & 0xf); | |
4416 | *p++ = tohex (command[i] & 0xf); | |
4417 | } | |
4418 | *p = '\0'; | |
4419 | ||
4420 | if (putpkt (buf) < 0) | |
4421 | error ("Communication problem with target\n"); | |
4422 | ||
4423 | /* get/display the response */ | |
4424 | while (1) | |
4425 | { | |
4426 | /* XXX - see also tracepoint.c:remote_get_noisy_reply() */ | |
4427 | buf[0] = '\0'; | |
4428 | getpkt (buf, 0); | |
4429 | if (buf[0] == '\0') | |
4430 | error ("Target does not support this command\n"); | |
4431 | if (buf[0] == 'O' && buf[1] != 'K') | |
4432 | { | |
4433 | remote_console_output (buf + 1); /* 'O' message from stub */ | |
4434 | continue; | |
4435 | } | |
4436 | if (strcmp (buf, "OK") == 0) | |
4437 | break; | |
7be570e7 JM |
4438 | if (strlen (buf) == 3 && buf[0] == 'E' |
4439 | && isdigit (buf[1]) && isdigit (buf[2])) | |
4440 | { | |
4441 | error ("Protocol error with Rcmd"); | |
4442 | } | |
96baa820 JM |
4443 | for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2) |
4444 | { | |
4445 | char c = (fromhex (p[0]) << 4) + fromhex (p[1]); | |
4446 | fputc_unfiltered (c, outbuf); | |
4447 | } | |
4448 | break; | |
4449 | } | |
4450 | } | |
4451 | ||
c906108c SS |
4452 | static void |
4453 | packet_command (args, from_tty) | |
4454 | char *args; | |
4455 | int from_tty; | |
4456 | { | |
085dd6e6 | 4457 | char *buf = alloca (PBUFSIZ); |
c906108c | 4458 | |
c5aa993b | 4459 | if (!remote_desc) |
c906108c SS |
4460 | error ("command can only be used with remote target"); |
4461 | ||
c5aa993b | 4462 | if (!args) |
c906108c SS |
4463 | error ("remote-packet command requires packet text as argument"); |
4464 | ||
4465 | puts_filtered ("sending: "); | |
4466 | print_packet (args); | |
4467 | puts_filtered ("\n"); | |
4468 | putpkt (args); | |
4469 | ||
4470 | getpkt (buf, 0); | |
4471 | puts_filtered ("received: "); | |
4472 | print_packet (buf); | |
4473 | puts_filtered ("\n"); | |
4474 | } | |
4475 | ||
4476 | #if 0 | |
4477 | /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------------- */ | |
4478 | ||
c5aa993b | 4479 | static void display_thread_info PARAMS ((struct gdb_ext_thread_info * info)); |
c906108c SS |
4480 | |
4481 | static void threadset_test_cmd PARAMS ((char *cmd, int tty)); | |
4482 | ||
4483 | static void threadalive_test PARAMS ((char *cmd, int tty)); | |
4484 | ||
4485 | static void threadlist_test_cmd PARAMS ((char *cmd, int tty)); | |
4486 | ||
c5aa993b | 4487 | int get_and_display_threadinfo PARAMS ((threadref * ref)); |
c906108c SS |
4488 | |
4489 | static void threadinfo_test_cmd PARAMS ((char *cmd, int tty)); | |
4490 | ||
c5aa993b | 4491 | static int thread_display_step PARAMS ((threadref * ref, void *context)); |
c906108c SS |
4492 | |
4493 | static void threadlist_update_test_cmd PARAMS ((char *cmd, int tty)); | |
4494 | ||
4495 | static void init_remote_threadtests PARAMS ((void)); | |
4496 | ||
c5aa993b | 4497 | #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid */ |
c906108c SS |
4498 | |
4499 | static void | |
4500 | threadset_test_cmd (cmd, tty) | |
4501 | char *cmd; | |
4502 | int tty; | |
4503 | { | |
4504 | int sample_thread = SAMPLE_THREAD; | |
4505 | ||
4506 | printf_filtered ("Remote threadset test\n"); | |
4507 | set_thread (sample_thread, 1); | |
4508 | } | |
4509 | ||
4510 | ||
4511 | static void | |
4512 | threadalive_test (cmd, tty) | |
4513 | char *cmd; | |
4514 | int tty; | |
4515 | { | |
4516 | int sample_thread = SAMPLE_THREAD; | |
4517 | ||
4518 | if (remote_thread_alive (sample_thread)) | |
4519 | printf_filtered ("PASS: Thread alive test\n"); | |
4520 | else | |
4521 | printf_filtered ("FAIL: Thread alive test\n"); | |
4522 | } | |
4523 | ||
4524 | void output_threadid PARAMS ((char *title, threadref * ref)); | |
4525 | ||
4526 | void | |
4527 | output_threadid (title, ref) | |
4528 | char *title; | |
4529 | threadref *ref; | |
4530 | { | |
4531 | char hexid[20]; | |
4532 | ||
4533 | pack_threadid (&hexid[0], ref); /* Convert threead id into hex */ | |
4534 | hexid[16] = 0; | |
4535 | printf_filtered ("%s %s\n", title, (&hexid[0])); | |
4536 | } | |
4537 | ||
4538 | static void | |
4539 | threadlist_test_cmd (cmd, tty) | |
4540 | char *cmd; | |
4541 | int tty; | |
4542 | { | |
4543 | int startflag = 1; | |
4544 | threadref nextthread; | |
4545 | int done, result_count; | |
4546 | threadref threadlist[3]; | |
4547 | ||
4548 | printf_filtered ("Remote Threadlist test\n"); | |
4549 | if (!remote_get_threadlist (startflag, &nextthread, 3, &done, | |
4550 | &result_count, &threadlist[0])) | |
4551 | printf_filtered ("FAIL: threadlist test\n"); | |
4552 | else | |
4553 | { | |
4554 | threadref *scan = threadlist; | |
4555 | threadref *limit = scan + result_count; | |
4556 | ||
4557 | while (scan < limit) | |
4558 | output_threadid (" thread ", scan++); | |
4559 | } | |
4560 | } | |
4561 | ||
4562 | void | |
4563 | display_thread_info (info) | |
4564 | struct gdb_ext_thread_info *info; | |
4565 | { | |
4566 | output_threadid ("Threadid: ", &info->threadid); | |
4567 | printf_filtered ("Name: %s\n ", info->shortname); | |
4568 | printf_filtered ("State: %s\n", info->display); | |
4569 | printf_filtered ("other: %s\n\n", info->more_display); | |
4570 | } | |
4571 | ||
4572 | int | |
4573 | get_and_display_threadinfo (ref) | |
4574 | threadref *ref; | |
4575 | { | |
4576 | int result; | |
4577 | int set; | |
4578 | struct gdb_ext_thread_info threadinfo; | |
4579 | ||
4580 | set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME | |
4581 | | TAG_MOREDISPLAY | TAG_DISPLAY; | |
4582 | if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo))) | |
4583 | display_thread_info (&threadinfo); | |
4584 | return result; | |
4585 | } | |
4586 | ||
4587 | static void | |
4588 | threadinfo_test_cmd (cmd, tty) | |
4589 | char *cmd; | |
4590 | int tty; | |
4591 | { | |
4592 | int athread = SAMPLE_THREAD; | |
4593 | threadref thread; | |
4594 | int set; | |
4595 | ||
4596 | int_to_threadref (&thread, athread); | |
4597 | printf_filtered ("Remote Threadinfo test\n"); | |
4598 | if (!get_and_display_threadinfo (&thread)) | |
4599 | printf_filtered ("FAIL cannot get thread info\n"); | |
4600 | } | |
4601 | ||
4602 | static int | |
4603 | thread_display_step (ref, context) | |
4604 | threadref *ref; | |
4605 | void *context; | |
4606 | { | |
4607 | /* output_threadid(" threadstep ",ref); *//* simple test */ | |
4608 | return get_and_display_threadinfo (ref); | |
4609 | } | |
4610 | ||
4611 | static void | |
4612 | threadlist_update_test_cmd (cmd, tty) | |
4613 | char *cmd; | |
4614 | int tty; | |
4615 | { | |
4616 | printf_filtered ("Remote Threadlist update test\n"); | |
4617 | remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS); | |
4618 | } | |
4619 | ||
4620 | static void | |
4621 | init_remote_threadtests (void) | |
4622 | { | |
4623 | add_com ("tlist", class_obscure, threadlist_test_cmd, | |
4624 | "Fetch and print the remote list of thread identifiers, one pkt only"); | |
4625 | add_com ("tinfo", class_obscure, threadinfo_test_cmd, | |
4626 | "Fetch and display info about one thread"); | |
4627 | add_com ("tset", class_obscure, threadset_test_cmd, | |
4628 | "Test setting to a different thread"); | |
4629 | add_com ("tupd", class_obscure, threadlist_update_test_cmd, | |
4630 | "Iterate through updating all remote thread info"); | |
4631 | add_com ("talive", class_obscure, threadalive_test, | |
4632 | " Remote thread alive test "); | |
4633 | } | |
4634 | ||
4635 | #endif /* 0 */ | |
4636 | ||
4637 | static void | |
4638 | init_remote_ops () | |
4639 | { | |
c5aa993b | 4640 | remote_ops.to_shortname = "remote"; |
c906108c | 4641 | remote_ops.to_longname = "Remote serial target in gdb-specific protocol"; |
c5aa993b | 4642 | remote_ops.to_doc = |
c906108c | 4643 | "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ |
c5aa993b JM |
4644 | Specify the serial device it is connected to (e.g. /dev/ttya)."; |
4645 | remote_ops.to_open = remote_open; | |
4646 | remote_ops.to_close = remote_close; | |
c906108c | 4647 | remote_ops.to_detach = remote_detach; |
c5aa993b | 4648 | remote_ops.to_resume = remote_resume; |
c906108c SS |
4649 | remote_ops.to_wait = remote_wait; |
4650 | remote_ops.to_fetch_registers = remote_fetch_registers; | |
4651 | remote_ops.to_store_registers = remote_store_registers; | |
4652 | remote_ops.to_prepare_to_store = remote_prepare_to_store; | |
c5aa993b JM |
4653 | remote_ops.to_xfer_memory = remote_xfer_memory; |
4654 | remote_ops.to_files_info = remote_files_info; | |
c906108c SS |
4655 | remote_ops.to_insert_breakpoint = remote_insert_breakpoint; |
4656 | remote_ops.to_remove_breakpoint = remote_remove_breakpoint; | |
c5aa993b JM |
4657 | remote_ops.to_kill = remote_kill; |
4658 | remote_ops.to_load = generic_load; | |
c906108c SS |
4659 | remote_ops.to_mourn_inferior = remote_mourn; |
4660 | remote_ops.to_thread_alive = remote_thread_alive; | |
0f71a2f6 | 4661 | remote_ops.to_find_new_threads = remote_threads_info; |
c906108c SS |
4662 | remote_ops.to_stop = remote_stop; |
4663 | remote_ops.to_query = remote_query; | |
96baa820 | 4664 | remote_ops.to_rcmd = remote_rcmd; |
c906108c | 4665 | remote_ops.to_stratum = process_stratum; |
c5aa993b JM |
4666 | remote_ops.to_has_all_memory = 1; |
4667 | remote_ops.to_has_memory = 1; | |
4668 | remote_ops.to_has_stack = 1; | |
4669 | remote_ops.to_has_registers = 1; | |
4670 | remote_ops.to_has_execution = 1; | |
4671 | remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */ | |
4672 | remote_ops.to_magic = OPS_MAGIC; | |
c906108c SS |
4673 | } |
4674 | ||
4675 | /* Set up the extended remote vector by making a copy of the standard | |
4676 | remote vector and adding to it. */ | |
4677 | ||
4678 | static void | |
4679 | init_extended_remote_ops () | |
4680 | { | |
4681 | extended_remote_ops = remote_ops; | |
4682 | ||
0f71a2f6 | 4683 | extended_remote_ops.to_shortname = "extended-remote"; |
c5aa993b | 4684 | extended_remote_ops.to_longname = |
c906108c | 4685 | "Extended remote serial target in gdb-specific protocol"; |
c5aa993b | 4686 | extended_remote_ops.to_doc = |
c906108c SS |
4687 | "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ |
4688 | Specify the serial device it is connected to (e.g. /dev/ttya).", | |
c5aa993b | 4689 | extended_remote_ops.to_open = extended_remote_open; |
c906108c SS |
4690 | extended_remote_ops.to_create_inferior = extended_remote_create_inferior; |
4691 | extended_remote_ops.to_mourn_inferior = extended_remote_mourn; | |
0f71a2f6 JM |
4692 | } |
4693 | ||
4694 | /* | |
4695 | * Command: info remote-process | |
4696 | * | |
4697 | * This implements Cisco's version of the "info proc" command. | |
4698 | * | |
4699 | * This query allows the target stub to return an arbitrary string | |
4700 | * (or strings) giving arbitrary information about the target process. | |
4701 | * This is optional; the target stub isn't required to implement it. | |
4702 | * | |
4703 | * Syntax: qfProcessInfo request first string | |
4704 | * qsProcessInfo request subsequent string | |
4705 | * reply: 'O'<hex-encoded-string> | |
4706 | * 'l' last reply (empty) | |
4707 | */ | |
4708 | ||
4709 | static void | |
4710 | remote_info_process (args, from_tty) | |
4711 | char *args; | |
4712 | int from_tty; | |
4713 | { | |
085dd6e6 | 4714 | char *buf = alloca (PBUFSIZ); |
0f71a2f6 JM |
4715 | |
4716 | if (remote_desc == 0) | |
4717 | error ("Command can only be used when connected to the remote target."); | |
4718 | ||
4719 | putpkt ("qfProcessInfo"); | |
4720 | getpkt (buf, 0); | |
4721 | if (buf[0] == 0) | |
c5aa993b | 4722 | return; /* Silently: target does not support this feature. */ |
0f71a2f6 JM |
4723 | |
4724 | if (buf[0] == 'E') | |
4725 | error ("info proc: target error."); | |
4726 | ||
c5aa993b | 4727 | while (buf[0] == 'O') /* Capitol-O packet */ |
0f71a2f6 JM |
4728 | { |
4729 | remote_console_output (&buf[1]); | |
4730 | putpkt ("qsProcessInfo"); | |
4731 | getpkt (buf, 0); | |
4732 | } | |
4733 | } | |
4734 | ||
4735 | /* | |
4736 | * Target Cisco | |
4737 | */ | |
4738 | ||
4739 | static void | |
4740 | remote_cisco_open (name, from_tty) | |
4741 | char *name; | |
4742 | int from_tty; | |
4743 | { | |
4744 | if (name == 0) | |
4745 | error ( | |
c5aa993b | 4746 | "To open a remote debug connection, you need to specify what \n\ |
0f71a2f6 JM |
4747 | device is attached to the remote system (e.g. host:port)."); |
4748 | ||
6426a772 JM |
4749 | /* See FIXME above */ |
4750 | wait_forever_enabled_p = 1; | |
4751 | ||
0f71a2f6 JM |
4752 | target_preopen (from_tty); |
4753 | ||
4754 | unpush_target (&remote_cisco_ops); | |
4755 | ||
4756 | remote_dcache = dcache_init (remote_read_bytes, remote_write_bytes); | |
4757 | ||
4758 | remote_desc = SERIAL_OPEN (name); | |
4759 | if (!remote_desc) | |
4760 | perror_with_name (name); | |
4761 | ||
4762 | /* | |
4763 | * If a baud rate was specified on the gdb command line it will | |
4764 | * be greater than the initial value of -1. If it is, use it otherwise | |
4765 | * default to 9600 | |
4766 | */ | |
4767 | ||
4768 | baud_rate = (baud_rate > 0) ? baud_rate : 9600; | |
c5aa993b | 4769 | if (SERIAL_SETBAUDRATE (remote_desc, baud_rate)) |
0f71a2f6 JM |
4770 | { |
4771 | SERIAL_CLOSE (remote_desc); | |
4772 | perror_with_name (name); | |
4773 | } | |
4774 | ||
4775 | SERIAL_RAW (remote_desc); | |
4776 | ||
4777 | /* If there is something sitting in the buffer we might take it as a | |
4778 | response to a command, which would be bad. */ | |
4779 | SERIAL_FLUSH_INPUT (remote_desc); | |
4780 | ||
4781 | if (from_tty) | |
4782 | { | |
4783 | puts_filtered ("Remote debugging using "); | |
4784 | puts_filtered (name); | |
4785 | puts_filtered ("\n"); | |
4786 | } | |
4787 | ||
4788 | remote_cisco_mode = 1; | |
4789 | ||
4790 | push_target (&remote_cisco_ops); /* Switch to using cisco target now */ | |
4791 | ||
5a2468f5 | 4792 | init_packet_config (&remote_protocol_P); |
96baa820 | 4793 | init_packet_config (&remote_protocol_Z); |
0f71a2f6 | 4794 | |
c5aa993b | 4795 | general_thread = -2; |
0f71a2f6 JM |
4796 | continue_thread = -2; |
4797 | ||
4798 | /* Force remote_write_bytes to check whether target supports | |
4799 | binary downloading. */ | |
96baa820 | 4800 | init_packet_config (&remote_protocol_binary_download); |
0f71a2f6 JM |
4801 | |
4802 | /* Without this, some commands which require an active target (such | |
4803 | as kill) won't work. This variable serves (at least) double duty | |
4804 | as both the pid of the target process (if it has such), and as a | |
4805 | flag indicating that a target is active. These functions should | |
4806 | be split out into seperate variables, especially since GDB will | |
4807 | someday have a notion of debugging several processes. */ | |
4808 | inferior_pid = MAGIC_NULL_PID; | |
4809 | ||
4810 | /* Start the remote connection; if error (0), discard this target. */ | |
4811 | ||
c5aa993b JM |
4812 | if (!catch_errors (remote_start_remote_dummy, (char *) 0, |
4813 | "Couldn't establish connection to remote target\n", | |
0f71a2f6 JM |
4814 | RETURN_MASK_ALL)) |
4815 | { | |
4816 | pop_target (); | |
4817 | return; | |
4818 | } | |
4819 | } | |
4820 | ||
4821 | static void | |
4822 | remote_cisco_close (quitting) | |
4823 | int quitting; | |
4824 | { | |
4825 | remote_cisco_mode = 0; | |
4826 | remote_close (quitting); | |
4827 | } | |
4828 | ||
c5aa993b JM |
4829 | static void |
4830 | remote_cisco_mourn | |
4831 | PARAMS ((void)) | |
0f71a2f6 JM |
4832 | { |
4833 | remote_mourn_1 (&remote_cisco_ops); | |
4834 | } | |
4835 | ||
c5aa993b JM |
4836 | enum |
4837 | { | |
4838 | READ_MORE, | |
4839 | FATAL_ERROR, | |
4840 | ENTER_DEBUG, | |
0f71a2f6 | 4841 | DISCONNECT_TELNET |
c5aa993b JM |
4842 | } |
4843 | minitelnet_return; | |
0f71a2f6 JM |
4844 | |
4845 | /* shared between readsocket() and readtty() */ | |
4846 | static char *tty_input; | |
4847 | ||
4848 | static int escape_count; | |
4849 | static int echo_check; | |
4850 | extern int quit_flag; | |
4851 | ||
4852 | static int | |
4853 | readsocket () | |
4854 | { | |
4855 | int data; | |
4856 | ||
4857 | /* Loop until the socket doesn't have any more data */ | |
4858 | ||
c5aa993b | 4859 | while ((data = readchar (0)) >= 0) |
0f71a2f6 JM |
4860 | { |
4861 | /* Check for the escape sequence */ | |
c5aa993b | 4862 | if (data == '|') |
0f71a2f6 JM |
4863 | { |
4864 | /* If this is the fourth escape, get out */ | |
c5aa993b | 4865 | if (++escape_count == 4) |
0f71a2f6 JM |
4866 | { |
4867 | return ENTER_DEBUG; | |
4868 | } | |
c5aa993b JM |
4869 | else |
4870 | { /* This is a '|', but not the fourth in a row. | |
4871 | Continue without echoing it. If it isn't actually | |
4872 | one of four in a row, it'll be echoed later. */ | |
0f71a2f6 JM |
4873 | continue; |
4874 | } | |
4875 | } | |
c5aa993b JM |
4876 | else |
4877 | /* Not a '|' */ | |
4878 | { | |
0f71a2f6 JM |
4879 | /* Ensure any pending '|'s are flushed. */ |
4880 | ||
c5aa993b JM |
4881 | for (; escape_count > 0; escape_count--) |
4882 | putchar ('|'); | |
0f71a2f6 | 4883 | } |
0f71a2f6 | 4884 | |
c5aa993b JM |
4885 | if (data == '\r') /* If this is a return character, */ |
4886 | continue; /* - just supress it. */ | |
4887 | ||
4888 | if (echo_check != -1) /* Check for echo of user input. */ | |
0f71a2f6 JM |
4889 | { |
4890 | if (tty_input[echo_check] == data) | |
4891 | { | |
c5aa993b JM |
4892 | echo_check++; /* Character matched user input: */ |
4893 | continue; /* Continue without echoing it. */ | |
0f71a2f6 | 4894 | } |
c5aa993b JM |
4895 | else if ((data == '\n') && (tty_input[echo_check] == '\r')) |
4896 | { /* End of the line (and of echo checking). */ | |
4897 | echo_check = -1; /* No more echo supression */ | |
4898 | continue; /* Continue without echoing. */ | |
0f71a2f6 JM |
4899 | } |
4900 | else | |
c5aa993b JM |
4901 | { /* Failed check for echo of user input. |
4902 | We now have some suppressed output to flush! */ | |
0f71a2f6 JM |
4903 | int j; |
4904 | ||
c5aa993b | 4905 | for (j = 0; j < echo_check; j++) |
0f71a2f6 JM |
4906 | putchar (tty_input[j]); |
4907 | echo_check = -1; | |
4908 | } | |
4909 | } | |
c5aa993b | 4910 | putchar (data); /* Default case: output the char. */ |
0f71a2f6 JM |
4911 | } |
4912 | ||
c5aa993b JM |
4913 | if (data == SERIAL_TIMEOUT) /* Timeout returned from readchar. */ |
4914 | return READ_MORE; /* Try to read some more */ | |
4915 | else | |
4916 | return FATAL_ERROR; /* Trouble, bail out */ | |
0f71a2f6 JM |
4917 | } |
4918 | ||
4919 | static int | |
4920 | readtty () | |
4921 | { | |
0f71a2f6 JM |
4922 | int tty_bytecount; |
4923 | ||
4924 | /* First, read a buffer full from the terminal */ | |
4925 | tty_bytecount = read (fileno (stdin), tty_input, sizeof (tty_input) - 1); | |
c5aa993b | 4926 | if (tty_bytecount == -1) |
0f71a2f6 JM |
4927 | { |
4928 | perror ("readtty: read failed"); | |
4929 | return FATAL_ERROR; | |
4930 | } | |
4931 | ||
4932 | /* Remove a quoted newline. */ | |
4933 | if (tty_input[tty_bytecount - 1] == '\n' && | |
4934 | tty_input[tty_bytecount - 2] == '\\') /* line ending in backslash */ | |
4935 | { | |
c5aa993b JM |
4936 | tty_input[--tty_bytecount] = 0; /* remove newline */ |
4937 | tty_input[--tty_bytecount] = 0; /* remove backslash */ | |
0f71a2f6 JM |
4938 | } |
4939 | ||
4940 | /* Turn trailing newlines into returns */ | |
4941 | if (tty_input[tty_bytecount - 1] == '\n') | |
c5aa993b | 4942 | tty_input[tty_bytecount - 1] = '\r'; |
0f71a2f6 JM |
4943 | |
4944 | /* If the line consists of a ~, enter debugging mode. */ | |
4945 | if ((tty_input[0] == '~') && (tty_bytecount == 2)) | |
4946 | return ENTER_DEBUG; | |
4947 | ||
4948 | /* Make this a zero terminated string and write it out */ | |
4949 | tty_input[tty_bytecount] = 0; | |
c5aa993b | 4950 | if (SERIAL_WRITE (remote_desc, tty_input, tty_bytecount)) |
0f71a2f6 JM |
4951 | { |
4952 | perror_with_name ("readtty: write failed"); | |
4953 | return FATAL_ERROR; | |
4954 | } | |
4955 | ||
4956 | return READ_MORE; | |
4957 | } | |
4958 | ||
4959 | static int | |
4960 | minitelnet () | |
4961 | { | |
4962 | fd_set input; /* file descriptors for select */ | |
c5aa993b JM |
4963 | int tablesize; /* max number of FDs for select */ |
4964 | int status; | |
4965 | int quit_count = 0; | |
0f71a2f6 JM |
4966 | |
4967 | extern int escape_count; /* global shared by readsocket */ | |
4968 | extern int echo_check; /* ditto */ | |
4969 | ||
4970 | escape_count = 0; | |
c5aa993b | 4971 | echo_check = -1; |
0f71a2f6 JM |
4972 | |
4973 | tablesize = 8 * sizeof (input); | |
4974 | ||
c5aa993b | 4975 | for (;;) |
0f71a2f6 JM |
4976 | { |
4977 | /* Check for anything from our socket - doesn't block. Note that | |
c5aa993b JM |
4978 | this must be done *before* the select as there may be |
4979 | buffered I/O waiting to be processed. */ | |
0f71a2f6 | 4980 | |
c5aa993b | 4981 | if ((status = readsocket ()) == FATAL_ERROR) |
0f71a2f6 JM |
4982 | { |
4983 | error ("Debugging terminated by communications error"); | |
4984 | } | |
c5aa993b | 4985 | else if (status != READ_MORE) |
0f71a2f6 JM |
4986 | { |
4987 | return (status); | |
4988 | } | |
4989 | ||
c5aa993b | 4990 | fflush (stdout); /* Flush output before blocking */ |
0f71a2f6 JM |
4991 | |
4992 | /* Now block on more socket input or TTY input */ | |
c5aa993b | 4993 | |
0f71a2f6 | 4994 | FD_ZERO (&input); |
c5aa993b | 4995 | FD_SET (fileno (stdin), &input); |
c2c6d25f | 4996 | FD_SET (DEPRECATED_SERIAL_FD (remote_desc), &input); |
0f71a2f6 JM |
4997 | |
4998 | status = select (tablesize, &input, 0, 0, 0); | |
c5aa993b | 4999 | if ((status == -1) && (errno != EINTR)) |
0f71a2f6 JM |
5000 | { |
5001 | error ("Communications error on select %d", errno); | |
5002 | } | |
5003 | ||
5004 | /* Handle Control-C typed */ | |
5005 | ||
c5aa993b | 5006 | if (quit_flag) |
0f71a2f6 JM |
5007 | { |
5008 | if ((++quit_count) == 2) | |
5009 | { | |
5010 | if (query ("Interrupt GDB? ")) | |
5011 | { | |
5012 | printf_filtered ("Interrupted by user.\n"); | |
5013 | return_to_top_level (RETURN_QUIT); | |
5014 | } | |
5015 | quit_count = 0; | |
5016 | } | |
5017 | quit_flag = 0; | |
5018 | ||
5019 | if (remote_break) | |
5020 | SERIAL_SEND_BREAK (remote_desc); | |
5021 | else | |
5022 | SERIAL_WRITE (remote_desc, "\003", 1); | |
5023 | ||
5024 | continue; | |
5025 | } | |
5026 | ||
5027 | /* Handle console input */ | |
5028 | ||
c5aa993b | 5029 | if (FD_ISSET (fileno (stdin), &input)) |
0f71a2f6 JM |
5030 | { |
5031 | quit_count = 0; | |
5032 | echo_check = 0; | |
5033 | status = readtty (); | |
5034 | if (status == READ_MORE) | |
5035 | continue; | |
5036 | ||
5037 | return status; /* telnet session ended */ | |
5038 | } | |
5039 | } | |
5040 | } | |
5041 | ||
5042 | static int | |
5043 | remote_cisco_wait (pid, status) | |
5044 | int pid; | |
5045 | struct target_waitstatus *status; | |
5046 | { | |
c5aa993b | 5047 | if (minitelnet () != ENTER_DEBUG) |
0f71a2f6 JM |
5048 | { |
5049 | error ("Debugging session terminated by protocol error"); | |
5050 | } | |
5051 | putpkt ("?"); | |
5052 | return remote_wait (pid, status); | |
5053 | } | |
5054 | ||
5055 | static void | |
5056 | init_remote_cisco_ops () | |
5057 | { | |
5058 | remote_cisco_ops.to_shortname = "cisco"; | |
c5aa993b JM |
5059 | remote_cisco_ops.to_longname = "Remote serial target in cisco-specific protocol"; |
5060 | remote_cisco_ops.to_doc = | |
0f71a2f6 JM |
5061 | "Use a remote machine via TCP, using a cisco-specific protocol.\n\ |
5062 | Specify the serial device it is connected to (e.g. host:2020)."; | |
c5aa993b JM |
5063 | remote_cisco_ops.to_open = remote_cisco_open; |
5064 | remote_cisco_ops.to_close = remote_cisco_close; | |
5065 | remote_cisco_ops.to_detach = remote_detach; | |
5066 | remote_cisco_ops.to_resume = remote_resume; | |
5067 | remote_cisco_ops.to_wait = remote_cisco_wait; | |
5068 | remote_cisco_ops.to_fetch_registers = remote_fetch_registers; | |
5069 | remote_cisco_ops.to_store_registers = remote_store_registers; | |
5070 | remote_cisco_ops.to_prepare_to_store = remote_prepare_to_store; | |
5071 | remote_cisco_ops.to_xfer_memory = remote_xfer_memory; | |
5072 | remote_cisco_ops.to_files_info = remote_files_info; | |
0f71a2f6 JM |
5073 | remote_cisco_ops.to_insert_breakpoint = remote_insert_breakpoint; |
5074 | remote_cisco_ops.to_remove_breakpoint = remote_remove_breakpoint; | |
c5aa993b JM |
5075 | remote_cisco_ops.to_kill = remote_kill; |
5076 | remote_cisco_ops.to_load = generic_load; | |
5077 | remote_cisco_ops.to_mourn_inferior = remote_cisco_mourn; | |
5078 | remote_cisco_ops.to_thread_alive = remote_thread_alive; | |
5079 | remote_cisco_ops.to_find_new_threads = remote_threads_info; | |
5080 | remote_cisco_ops.to_stratum = process_stratum; | |
5081 | remote_cisco_ops.to_has_all_memory = 1; | |
5082 | remote_cisco_ops.to_has_memory = 1; | |
5083 | remote_cisco_ops.to_has_stack = 1; | |
5084 | remote_cisco_ops.to_has_registers = 1; | |
5085 | remote_cisco_ops.to_has_execution = 1; | |
5086 | remote_cisco_ops.to_magic = OPS_MAGIC; | |
0f71a2f6 JM |
5087 | } |
5088 | ||
6426a772 JM |
5089 | static int |
5090 | remote_can_async_p (void) | |
5091 | { | |
5092 | /* We're async whenever the serial device is. */ | |
5093 | return SERIAL_CAN_ASYNC_P (remote_desc); | |
5094 | } | |
5095 | ||
5096 | static int | |
5097 | remote_is_async_p (void) | |
5098 | { | |
5099 | /* We're async whenever the serial device is. */ | |
5100 | return SERIAL_IS_ASYNC_P (remote_desc); | |
5101 | } | |
5102 | ||
2acceee2 JM |
5103 | /* Pass the SERIAL event on and up to the client. One day this code |
5104 | will be able to delay notifying the client of an event until the | |
5105 | point where an entire packet has been received. */ | |
5106 | ||
5107 | static void (*async_client_callback) (enum inferior_event_type event_type, void *context); | |
5108 | static void *async_client_context; | |
5109 | static serial_event_ftype remote_async_serial_handler; | |
5110 | ||
6426a772 | 5111 | static void |
2acceee2 | 5112 | remote_async_serial_handler (serial_t scb, void *context) |
6426a772 | 5113 | { |
2acceee2 JM |
5114 | /* Don't propogate error information up to the client. Instead let |
5115 | the client find out about the error by querying the target. */ | |
5116 | async_client_callback (INF_REG_EVENT, async_client_context); | |
5117 | } | |
5118 | ||
5119 | static void | |
5120 | remote_async (void (*callback) (enum inferior_event_type event_type, void *context), void *context) | |
5121 | { | |
5122 | if (callback != NULL) | |
5123 | { | |
5124 | SERIAL_ASYNC (remote_desc, remote_async_serial_handler, NULL); | |
5125 | async_client_callback = callback; | |
5126 | async_client_context = context; | |
5127 | } | |
5128 | else | |
5129 | SERIAL_ASYNC (remote_desc, NULL, NULL); | |
6426a772 JM |
5130 | } |
5131 | ||
43ff13b4 JM |
5132 | /* Target async and target extended-async. |
5133 | ||
5134 | This are temporary targets, until it is all tested. Eventually | |
5135 | async support will be incorporated int the usual 'remote' | |
5136 | target. */ | |
5137 | ||
5138 | static void | |
5139 | init_remote_async_ops () | |
5140 | { | |
5141 | remote_async_ops.to_shortname = "async"; | |
c5aa993b JM |
5142 | remote_async_ops.to_longname = "Remote serial target in async version of the gdb-specific protocol"; |
5143 | remote_async_ops.to_doc = | |
43ff13b4 JM |
5144 | "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ |
5145 | Specify the serial device it is connected to (e.g. /dev/ttya)."; | |
c5aa993b JM |
5146 | remote_async_ops.to_open = remote_async_open; |
5147 | remote_async_ops.to_close = remote_close; | |
5148 | remote_async_ops.to_detach = remote_async_detach; | |
5149 | remote_async_ops.to_resume = remote_async_resume; | |
5150 | remote_async_ops.to_wait = remote_async_wait; | |
5151 | remote_async_ops.to_fetch_registers = remote_fetch_registers; | |
5152 | remote_async_ops.to_store_registers = remote_store_registers; | |
5153 | remote_async_ops.to_prepare_to_store = remote_prepare_to_store; | |
5154 | remote_async_ops.to_xfer_memory = remote_xfer_memory; | |
5155 | remote_async_ops.to_files_info = remote_files_info; | |
43ff13b4 JM |
5156 | remote_async_ops.to_insert_breakpoint = remote_insert_breakpoint; |
5157 | remote_async_ops.to_remove_breakpoint = remote_remove_breakpoint; | |
6426a772 JM |
5158 | remote_async_ops.to_terminal_inferior = remote_async_terminal_inferior; |
5159 | remote_async_ops.to_terminal_ours = remote_async_terminal_ours; | |
c5aa993b JM |
5160 | remote_async_ops.to_kill = remote_async_kill; |
5161 | remote_async_ops.to_load = generic_load; | |
53a5351d | 5162 | remote_async_ops.to_mourn_inferior = remote_async_mourn; |
c5aa993b JM |
5163 | remote_async_ops.to_thread_alive = remote_thread_alive; |
5164 | remote_async_ops.to_find_new_threads = remote_threads_info; | |
43ff13b4 JM |
5165 | remote_async_ops.to_stop = remote_stop; |
5166 | remote_async_ops.to_query = remote_query; | |
96baa820 | 5167 | remote_async_ops.to_rcmd = remote_rcmd; |
c5aa993b JM |
5168 | remote_async_ops.to_stratum = process_stratum; |
5169 | remote_async_ops.to_has_all_memory = 1; | |
5170 | remote_async_ops.to_has_memory = 1; | |
5171 | remote_async_ops.to_has_stack = 1; | |
5172 | remote_async_ops.to_has_registers = 1; | |
5173 | remote_async_ops.to_has_execution = 1; | |
5174 | remote_async_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */ | |
6426a772 JM |
5175 | remote_async_ops.to_can_async_p = remote_can_async_p; |
5176 | remote_async_ops.to_is_async_p = remote_is_async_p; | |
5177 | remote_async_ops.to_async = remote_async; | |
c5aa993b | 5178 | remote_async_ops.to_magic = OPS_MAGIC; |
43ff13b4 JM |
5179 | } |
5180 | ||
5181 | /* Set up the async extended remote vector by making a copy of the standard | |
5182 | remote vector and adding to it. */ | |
5183 | ||
5184 | static void | |
5185 | init_extended_async_remote_ops () | |
5186 | { | |
5187 | extended_async_remote_ops = remote_async_ops; | |
5188 | ||
5189 | extended_async_remote_ops.to_shortname = "extended-async"; | |
c5aa993b | 5190 | extended_async_remote_ops.to_longname = |
43ff13b4 | 5191 | "Extended remote serial target in async gdb-specific protocol"; |
c5aa993b | 5192 | extended_async_remote_ops.to_doc = |
43ff13b4 JM |
5193 | "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\ |
5194 | Specify the serial device it is connected to (e.g. /dev/ttya).", | |
c5aa993b | 5195 | extended_async_remote_ops.to_open = extended_remote_async_open; |
43ff13b4 JM |
5196 | extended_async_remote_ops.to_create_inferior = extended_remote_async_create_inferior; |
5197 | extended_async_remote_ops.to_mourn_inferior = extended_remote_mourn; | |
5198 | } | |
5199 | ||
5a2468f5 JM |
5200 | static void |
5201 | set_remote_cmd (args, from_tty) | |
5202 | char *args; | |
5203 | int from_tty; | |
5204 | { | |
5205 | ||
5206 | } | |
5207 | ||
5208 | ||
0f71a2f6 JM |
5209 | static void |
5210 | build_remote_gdbarch_data () | |
5211 | { | |
5212 | tty_input = xmalloc (PBUFSIZ); | |
5213 | } | |
5214 | ||
c906108c SS |
5215 | void |
5216 | _initialize_remote () | |
5217 | { | |
5a2468f5 JM |
5218 | static struct cmd_list_element *remote_set_cmdlist; |
5219 | static struct cmd_list_element *remote_show_cmdlist; | |
5220 | ||
0f71a2f6 JM |
5221 | /* architecture specific data */ |
5222 | build_remote_gdbarch_data (); | |
5223 | register_gdbarch_swap (&tty_input, sizeof (&tty_input), NULL); | |
5224 | register_gdbarch_swap (NULL, 0, build_remote_gdbarch_data); | |
5225 | ||
5226 | /* runtime constants - we retain the value of remote_write_size | |
5227 | across architecture swaps. */ | |
cce74817 JM |
5228 | remote_write_size = PBUFSIZ; |
5229 | ||
c906108c SS |
5230 | init_remote_ops (); |
5231 | add_target (&remote_ops); | |
5232 | ||
5233 | init_extended_remote_ops (); | |
5234 | add_target (&extended_remote_ops); | |
cce74817 | 5235 | |
43ff13b4 JM |
5236 | init_remote_async_ops (); |
5237 | add_target (&remote_async_ops); | |
5238 | ||
5239 | init_extended_async_remote_ops (); | |
5240 | add_target (&extended_async_remote_ops); | |
5241 | ||
0f71a2f6 JM |
5242 | init_remote_cisco_ops (); |
5243 | add_target (&remote_cisco_ops); | |
5244 | ||
c906108c SS |
5245 | #if 0 |
5246 | init_remote_threadtests (); | |
5247 | #endif | |
5248 | ||
5a2468f5 JM |
5249 | add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, "\ |
5250 | Remote protocol specific variables\n\ | |
5251 | Configure various remote-protocol specific variables such as\n\ | |
5252 | the packets being used", | |
cff3e48b | 5253 | &remote_set_cmdlist, "set remote ", |
5a2468f5 JM |
5254 | 0/*allow-unknown*/, &setlist); |
5255 | add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, "\ | |
5256 | Remote protocol specific variables\n\ | |
5257 | Configure various remote-protocol specific variables such as\n\ | |
5258 | the packets being used", | |
cff3e48b | 5259 | &remote_show_cmdlist, "show remote ", |
5a2468f5 JM |
5260 | 0/*allow-unknown*/, &showlist); |
5261 | ||
c5aa993b | 5262 | add_cmd ("compare-sections", class_obscure, compare_sections_command, |
c906108c | 5263 | "Compare section data on target to the exec file.\n\ |
c5aa993b | 5264 | Argument is a single section name (default: all loaded sections).", |
c906108c SS |
5265 | &cmdlist); |
5266 | ||
5267 | add_cmd ("packet", class_maintenance, packet_command, | |
5268 | "Send an arbitrary packet to a remote target.\n\ | |
5269 | maintenance packet TEXT\n\ | |
5270 | If GDB is talking to an inferior via the GDB serial protocol, then\n\ | |
5271 | this command sends the string TEXT to the inferior, and displays the\n\ | |
5272 | response packet. GDB supplies the initial `$' character, and the\n\ | |
5273 | terminating `#' character and checksum.", | |
5274 | &maintenancelist); | |
5275 | ||
c5aa993b | 5276 | add_show_from_set |
c906108c | 5277 | (add_set_cmd ("remotetimeout", no_class, |
c5aa993b | 5278 | var_integer, (char *) &remote_timeout, |
c906108c SS |
5279 | "Set timeout value for remote read.\n", |
5280 | &setlist), | |
5281 | &showlist); | |
5282 | ||
c5aa993b | 5283 | add_show_from_set |
c906108c | 5284 | (add_set_cmd ("remotebreak", no_class, |
adf40b2e | 5285 | var_boolean, (char *) &remote_break, |
c906108c SS |
5286 | "Set whether to send break if interrupted.\n", |
5287 | &setlist), | |
5288 | &showlist); | |
5289 | ||
c5aa993b | 5290 | add_show_from_set |
c906108c | 5291 | (add_set_cmd ("remotewritesize", no_class, |
c5aa993b JM |
5292 | var_integer, (char *) &remote_write_size, |
5293 | "Set the maximum number of bytes per memory write packet.\n", | |
c906108c SS |
5294 | &setlist), |
5295 | &showlist); | |
5296 | ||
5297 | remote_address_size = TARGET_PTR_BIT; | |
c5aa993b | 5298 | add_show_from_set |
c906108c | 5299 | (add_set_cmd ("remoteaddresssize", class_obscure, |
c5aa993b | 5300 | var_integer, (char *) &remote_address_size, |
c906108c SS |
5301 | "Set the maximum size of the address (in bits) \ |
5302 | in a memory packet.\n", | |
5303 | &setlist), | |
c5aa993b | 5304 | &showlist); |
c906108c | 5305 | |
96baa820 JM |
5306 | add_packet_config_cmd (&remote_protocol_binary_download, |
5307 | "X", "binary-download", | |
5308 | set_remote_protocol_binary_download_cmd, | |
5309 | show_remote_protocol_binary_download_cmd, | |
5310 | &remote_set_cmdlist, &remote_show_cmdlist); | |
5311 | #if 0 | |
5312 | /* XXXX - should ``set remotebinarydownload'' be retained for | |
5313 | compatibility. */ | |
c5aa993b | 5314 | add_show_from_set |
b83266a0 SS |
5315 | (add_set_cmd ("remotebinarydownload", no_class, |
5316 | var_boolean, (char *) &remote_binary_download, | |
5317 | "Set binary downloads.\n", &setlist), | |
5318 | &showlist); | |
96baa820 | 5319 | #endif |
0f71a2f6 JM |
5320 | |
5321 | add_info ("remote-process", remote_info_process, | |
5322 | "Query the remote system for process info."); | |
5323 | ||
5a2468f5 JM |
5324 | add_packet_config_cmd (&remote_protocol_P, "P", "set-register", |
5325 | set_remote_protocol_P_packet_cmd, | |
5326 | show_remote_protocol_P_packet_cmd, | |
5327 | &remote_set_cmdlist, &remote_show_cmdlist); | |
96baa820 JM |
5328 | |
5329 | add_packet_config_cmd (&remote_protocol_Z, "Z", "breakpoint", | |
5330 | set_remote_protocol_Z_packet_cmd, | |
5331 | show_remote_protocol_Z_packet_cmd, | |
5332 | &remote_set_cmdlist, &remote_show_cmdlist); | |
c906108c | 5333 | } |