Commit | Line | Data |
---|---|---|
b543979c | 1 | /* Remote target communications for serial-line targets in custom GDB protocol |
7c622b41 | 2 | Copyright 1988, 1991, 1992, 1993 Free Software Foundation, Inc. |
bd5635a1 RP |
3 | |
4 | This file is part of GDB. | |
5 | ||
b543979c | 6 | This program is free software; you can redistribute it and/or modify |
bd5635a1 | 7 | it under the terms of the GNU General Public License as published by |
b543979c JG |
8 | the Free Software Foundation; either version 2 of the License, or |
9 | (at your option) any later version. | |
bd5635a1 | 10 | |
b543979c | 11 | This program is distributed in the hope that it will be useful, |
bd5635a1 RP |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
b543979c JG |
17 | along with this program; if not, write to the Free Software |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
bd5635a1 RP |
19 | |
20 | /* Remote communication protocol. | |
e50ebec8 JK |
21 | |
22 | A debug packet whose contents are <data> | |
23 | is encapsulated for transmission in the form: | |
24 | ||
25 | $ <data> # CSUM1 CSUM2 | |
26 | ||
27 | <data> must be ASCII alphanumeric and cannot include characters | |
28 | '$' or '#' | |
29 | ||
30 | CSUM1 and CSUM2 are ascii hex representation of an 8-bit | |
31 | checksum of <data>, the most significant nibble is sent first. | |
32 | the hex digits 0-9,a-f are used. | |
33 | ||
34 | Receiver responds with: | |
35 | ||
36 | + - if CSUM is correct and ready for next packet | |
37 | - - if CSUM is incorrect | |
38 | ||
39 | <data> is as follows: | |
bd5635a1 RP |
40 | All values are encoded in ascii hex digits. |
41 | ||
42 | Request Packet | |
43 | ||
44 | read registers g | |
45 | reply XX....X Each byte of register data | |
46 | is described by two hex digits. | |
47 | Registers are in the internal order | |
48 | for GDB, and the bytes in a register | |
49 | are in the same order the machine uses. | |
50 | or ENN for an error. | |
51 | ||
52 | write regs GXX..XX Each byte of register data | |
53 | is described by two hex digits. | |
54 | reply OK for success | |
55 | ENN for an error | |
56 | ||
57 | read mem mAA..AA,LLLL AA..AA is address, LLLL is length. | |
58 | reply XX..XX XX..XX is mem contents | |
d538b510 RP |
59 | Can be fewer bytes than requested |
60 | if able to read only part of the data. | |
bd5635a1 RP |
61 | or ENN NN is errno |
62 | ||
63 | write mem MAA..AA,LLLL:XX..XX | |
64 | AA..AA is address, | |
65 | LLLL is number of bytes, | |
66 | XX..XX is data | |
67 | reply OK for success | |
d538b510 RP |
68 | ENN for an error (this includes the case |
69 | where only part of the data was | |
70 | written). | |
bd5635a1 RP |
71 | |
72 | cont cAA..AA AA..AA is address to resume | |
73 | If AA..AA is omitted, | |
74 | resume at same address. | |
75 | ||
76 | step sAA..AA AA..AA is address to resume | |
77 | If AA..AA is omitted, | |
78 | resume at same address. | |
79 | ||
80 | last signal ? Reply the current reason for stopping. | |
81 | This is the same reply as is generated | |
82 | for step or cont : SAA where AA is the | |
83 | signal number. | |
84 | ||
85 | There is no immediate reply to step or cont. | |
86 | The reply comes when the machine stops. | |
87 | It is SAA AA is the "signal number" | |
88 | ||
e50ebec8 JK |
89 | or... TAAn...:r...;n:r...;n...:r...; |
90 | AA = signal number | |
91 | n... = register number | |
92 | r... = register contents | |
758aeb93 ILT |
93 | or... WAA The process extited, and AA is |
94 | the exit status. This is only | |
95 | applicable for certains sorts of | |
96 | targets. | |
97 | or... NAATT;DD;BB Relocate the object file. | |
98 | AA = signal number | |
99 | TT = text address | |
100 | DD = data address | |
101 | BB = bss address | |
102 | This is used by the NLM stub, | |
103 | which is why it only has three | |
104 | addresses rather than one per | |
105 | section: the NLM stub always | |
106 | sees only three sections, even | |
107 | though gdb may see more. | |
8f86a4e4 | 108 | |
d538b510 RP |
109 | kill request k |
110 | ||
111 | toggle debug d toggle debug flag (see 386 & 68k stubs) | |
112 | reset r reset -- see sparc stub. | |
113 | reserved <other> On other requests, the stub should | |
114 | ignore the request and send an empty | |
115 | response ($#<checksum>). This way | |
116 | we can extend the protocol and GDB | |
117 | can tell whether the stub it is | |
118 | talking to uses the old or the new. | |
bd5635a1 RP |
119 | */ |
120 | ||
d747e0af | 121 | #include "defs.h" |
bd5635a1 RP |
122 | #include <string.h> |
123 | #include <fcntl.h> | |
bd5635a1 RP |
124 | #include "frame.h" |
125 | #include "inferior.h" | |
e50ebec8 | 126 | #include "bfd.h" |
6b27ebe8 | 127 | #include "symfile.h" |
bd5635a1 RP |
128 | #include "target.h" |
129 | #include "wait.h" | |
130 | #include "terminal.h" | |
8f86a4e4 | 131 | #include "gdbcmd.h" |
758aeb93 ILT |
132 | #include "objfiles.h" |
133 | #include "gdb-stabs.h" | |
bd5635a1 | 134 | |
d538b510 | 135 | #include "dcache.h" |
a94abe5b | 136 | #include "remote-utils.h" |
d538b510 | 137 | |
8f86a4e4 | 138 | #if !defined(DONT_USE_REMOTE) |
bd5635a1 RP |
139 | #ifdef USG |
140 | #include <sys/types.h> | |
141 | #endif | |
142 | ||
143 | #include <signal.h> | |
ebdb9ade | 144 | #include "serial.h" |
bd5635a1 | 145 | |
b543979c JG |
146 | /* Prototypes for local functions */ |
147 | ||
d538b510 RP |
148 | static int |
149 | remote_write_bytes PARAMS ((CORE_ADDR memaddr, unsigned char *myaddr, int len)); | |
b543979c | 150 | |
d538b510 RP |
151 | static int |
152 | remote_read_bytes PARAMS ((CORE_ADDR memaddr, unsigned char *myaddr, int len)); | |
b543979c JG |
153 | |
154 | static void | |
5af4f5f6 | 155 | remote_files_info PARAMS ((struct target_ops *ignore)); |
b543979c JG |
156 | |
157 | static int | |
5af4f5f6 JK |
158 | remote_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, int len, |
159 | int should_write, struct target_ops *target)); | |
b543979c JG |
160 | |
161 | static void | |
162 | remote_prepare_to_store PARAMS ((void)); | |
163 | ||
164 | static void | |
5af4f5f6 | 165 | remote_fetch_registers PARAMS ((int regno)); |
b543979c JG |
166 | |
167 | static void | |
d538b510 | 168 | remote_resume PARAMS ((int pid, int step, int siggnal)); |
b543979c | 169 | |
7c622b41 | 170 | static int |
5af4f5f6 | 171 | remote_start_remote PARAMS ((char *dummy)); |
7c622b41 | 172 | |
b543979c | 173 | static void |
5af4f5f6 | 174 | remote_open PARAMS ((char *name, int from_tty)); |
b543979c JG |
175 | |
176 | static void | |
5af4f5f6 | 177 | remote_close PARAMS ((int quitting)); |
b543979c JG |
178 | |
179 | static void | |
5af4f5f6 | 180 | remote_store_registers PARAMS ((int regno)); |
b543979c JG |
181 | |
182 | static void | |
5af4f5f6 | 183 | getpkt PARAMS ((char *buf, int forever)); |
b543979c JG |
184 | |
185 | static void | |
5af4f5f6 | 186 | putpkt PARAMS ((char *buf)); |
b543979c JG |
187 | |
188 | static void | |
5af4f5f6 | 189 | remote_send PARAMS ((char *buf)); |
b543979c JG |
190 | |
191 | static int | |
192 | readchar PARAMS ((void)); | |
193 | ||
194 | static int | |
5af4f5f6 | 195 | remote_wait PARAMS ((WAITTYPE *status)); |
b543979c JG |
196 | |
197 | static int | |
5af4f5f6 | 198 | tohex PARAMS ((int nib)); |
b543979c JG |
199 | |
200 | static int | |
5af4f5f6 | 201 | fromhex PARAMS ((int a)); |
b543979c JG |
202 | |
203 | static void | |
5af4f5f6 JK |
204 | remote_detach PARAMS ((char *args, int from_tty)); |
205 | ||
206 | static void | |
207 | remote_interrupt PARAMS ((int signo)); | |
208 | ||
209 | static void | |
210 | remote_interrupt_twice PARAMS ((int signo)); | |
b543979c | 211 | |
981a3309 SG |
212 | static void |
213 | interrupt_query PARAMS ((void)); | |
214 | ||
bd5635a1 RP |
215 | extern struct target_ops remote_ops; /* Forward decl */ |
216 | ||
ebdb9ade JK |
217 | /* This was 5 seconds, which is a long time to sit and wait. |
218 | Unless this is going though some terminal server or multiplexer or | |
219 | other form of hairy serial connection, I would think 2 seconds would | |
220 | be plenty. */ | |
221 | static int timeout = 2; | |
bd5635a1 RP |
222 | |
223 | #if 0 | |
224 | int icache; | |
225 | #endif | |
226 | ||
16e1d1d3 | 227 | /* Descriptor for I/O to remote machine. Initialize it to NULL so that |
bd5635a1 RP |
228 | remote_open knows that we don't have a file open when the program |
229 | starts. */ | |
ebdb9ade | 230 | serial_t remote_desc = NULL; |
bd5635a1 | 231 | |
b543979c | 232 | #define PBUFSIZ 1024 |
bd5635a1 RP |
233 | |
234 | /* Maximum number of bytes to read/write at once. The value here | |
235 | is chosen to fill up a packet (the headers account for the 32). */ | |
236 | #define MAXBUFBYTES ((PBUFSIZ-32)/2) | |
237 | ||
b543979c JG |
238 | /* Round up PBUFSIZ to hold all the registers, at least. */ |
239 | #if REGISTER_BYTES > MAXBUFBYTES | |
240 | #undef PBUFSIZ | |
241 | #define PBUFSIZ (REGISTER_BYTES * 2 + 32) | |
bd5635a1 | 242 | #endif |
bd5635a1 | 243 | \f |
bd5635a1 RP |
244 | /* Clean up connection to a remote debugger. */ |
245 | ||
e1ce8aa5 | 246 | /* ARGSUSED */ |
b543979c | 247 | static void |
bd5635a1 RP |
248 | remote_close (quitting) |
249 | int quitting; | |
250 | { | |
ebdb9ade JK |
251 | if (remote_desc) |
252 | SERIAL_CLOSE (remote_desc); | |
253 | remote_desc = NULL; | |
b543979c JG |
254 | } |
255 | ||
7c622b41 JG |
256 | /* Stub for catch_errors. */ |
257 | ||
258 | static int | |
259 | remote_start_remote (dummy) | |
260 | char *dummy; | |
261 | { | |
ac7a377f JK |
262 | immediate_quit = 1; /* Allow user to interrupt it */ |
263 | ||
7c622b41 | 264 | /* Ack any packet which the remote side has already sent. */ |
a4cb75b8 JK |
265 | /* I'm not sure this \r is needed; we don't use it any other time we |
266 | send an ack. */ | |
ebdb9ade | 267 | SERIAL_WRITE (remote_desc, "+\r", 2); |
7c622b41 | 268 | putpkt ("?"); /* initiate a query from remote machine */ |
ac7a377f | 269 | immediate_quit = 0; |
7c622b41 JG |
270 | |
271 | start_remote (); /* Initialize gdb process mechanisms */ | |
272 | return 1; | |
273 | } | |
274 | ||
bd5635a1 RP |
275 | /* Open a connection to a remote debugger. |
276 | NAME is the filename used for communication. */ | |
277 | ||
d538b510 RP |
278 | static DCACHE *remote_dcache; |
279 | ||
b543979c | 280 | static void |
bd5635a1 RP |
281 | remote_open (name, from_tty) |
282 | char *name; | |
283 | int from_tty; | |
284 | { | |
bd5635a1 RP |
285 | if (name == 0) |
286 | error ( | |
287 | "To open a remote debug connection, you need to specify what serial\n\ | |
288 | device is attached to the remote system (e.g. /dev/ttya)."); | |
289 | ||
f2fc6e7a JK |
290 | target_preopen (from_tty); |
291 | ||
ebdb9ade | 292 | unpush_target (&remote_ops); |
bd5635a1 | 293 | |
d538b510 | 294 | remote_dcache = dcache_init (remote_read_bytes, remote_write_bytes); |
bd5635a1 | 295 | |
ebdb9ade JK |
296 | remote_desc = SERIAL_OPEN (name); |
297 | if (!remote_desc) | |
bd5635a1 RP |
298 | perror_with_name (name); |
299 | ||
a94abe5b | 300 | if (SERIAL_SETBAUDRATE (remote_desc, sr_get_baud_rate())) |
b543979c | 301 | { |
a94abe5b RP |
302 | SERIAL_CLOSE (remote_desc); |
303 | perror_with_name (name); | |
b543979c | 304 | } |
ebdb9ade JK |
305 | |
306 | SERIAL_RAW (remote_desc); | |
bd5635a1 | 307 | |
e15f2a54 JK |
308 | /* If there is something sitting in the buffer we might take it as a |
309 | response to a command, which would be bad. */ | |
310 | SERIAL_FLUSH_INPUT (remote_desc); | |
311 | ||
bd5635a1 | 312 | if (from_tty) |
7c622b41 JG |
313 | { |
314 | puts_filtered ("Remote debugging using "); | |
315 | puts_filtered (name); | |
316 | puts_filtered ("\n"); | |
317 | } | |
bd5635a1 | 318 | push_target (&remote_ops); /* Switch to using remote target now */ |
bd5635a1 | 319 | |
ac7a377f JK |
320 | /* Start the remote connection; if error (0), discard this target. |
321 | In particular, if the user quits, be sure to discard it | |
322 | (we'd be in an inconsistent state otherwise). */ | |
7c622b41 | 323 | if (!catch_errors (remote_start_remote, (char *)0, |
e50ebec8 | 324 | "Couldn't establish connection to remote target\n", RETURN_MASK_ALL)) |
7c622b41 | 325 | pop_target(); |
bd5635a1 RP |
326 | } |
327 | ||
328 | /* remote_detach() | |
329 | takes a program previously attached to and detaches it. | |
330 | We better not have left any breakpoints | |
331 | in the program or it'll die when it hits one. | |
332 | Close the open connection to the remote debugger. | |
333 | Use this when you want to detach and do something else | |
334 | with your gdb. */ | |
335 | ||
336 | static void | |
337 | remote_detach (args, from_tty) | |
338 | char *args; | |
339 | int from_tty; | |
340 | { | |
341 | if (args) | |
342 | error ("Argument given to \"detach\" when remotely debugging."); | |
343 | ||
344 | pop_target (); | |
345 | if (from_tty) | |
7c622b41 | 346 | puts_filtered ("Ending remote debugging.\n"); |
bd5635a1 RP |
347 | } |
348 | ||
349 | /* Convert hex digit A to a number. */ | |
350 | ||
351 | static int | |
352 | fromhex (a) | |
353 | int a; | |
354 | { | |
355 | if (a >= '0' && a <= '9') | |
356 | return a - '0'; | |
357 | else if (a >= 'a' && a <= 'f') | |
358 | return a - 'a' + 10; | |
359 | else | |
360 | error ("Reply contains invalid hex digit"); | |
361 | return -1; | |
362 | } | |
363 | ||
364 | /* Convert number NIB to a hex digit. */ | |
365 | ||
366 | static int | |
367 | tohex (nib) | |
368 | int nib; | |
369 | { | |
370 | if (nib < 10) | |
371 | return '0'+nib; | |
372 | else | |
373 | return 'a'+nib-10; | |
374 | } | |
375 | \f | |
376 | /* Tell the remote machine to resume. */ | |
377 | ||
b543979c | 378 | static void |
d538b510 RP |
379 | remote_resume (pid, step, siggnal) |
380 | int pid, step, siggnal; | |
bd5635a1 RP |
381 | { |
382 | char buf[PBUFSIZ]; | |
383 | ||
384 | if (siggnal) | |
ebdb9ade JK |
385 | { |
386 | char *name; | |
387 | target_terminal_ours_for_output (); | |
388 | printf_filtered ("Can't send signals to a remote system. "); | |
389 | name = strsigno (siggnal); | |
390 | if (name) | |
391 | printf_filtered (name); | |
392 | else | |
393 | printf_filtered ("Signal %d", siggnal); | |
394 | printf_filtered (" not sent.\n"); | |
395 | target_terminal_inferior (); | |
396 | } | |
bd5635a1 | 397 | |
d538b510 | 398 | dcache_flush (remote_dcache); |
bd5635a1 RP |
399 | |
400 | strcpy (buf, step ? "s": "c"); | |
401 | ||
402 | putpkt (buf); | |
403 | } | |
ebdb9ade | 404 | \f |
b543979c JG |
405 | /* Send ^C to target to halt it. Target will respond, and send us a |
406 | packet. */ | |
407 | ||
5af4f5f6 JK |
408 | static void |
409 | remote_interrupt (signo) | |
e676a15f | 410 | int signo; |
b543979c | 411 | { |
ebdb9ade JK |
412 | /* If this doesn't work, try more severe steps. */ |
413 | signal (signo, remote_interrupt_twice); | |
8f86a4e4 | 414 | |
66a48870 | 415 | if (sr_get_debug ()) |
8f86a4e4 JG |
416 | printf ("remote_interrupt called\n"); |
417 | ||
ebdb9ade | 418 | SERIAL_WRITE (remote_desc, "\003", 1); /* Send a ^C */ |
b543979c JG |
419 | } |
420 | ||
5af4f5f6 JK |
421 | static void (*ofunc)(); |
422 | ||
ebdb9ade JK |
423 | /* The user typed ^C twice. */ |
424 | static void | |
425 | remote_interrupt_twice (signo) | |
426 | int signo; | |
427 | { | |
428 | signal (signo, ofunc); | |
429 | ||
981a3309 SG |
430 | interrupt_query (); |
431 | ||
432 | signal (signo, remote_interrupt); | |
433 | } | |
434 | ||
435 | /* Ask the user what to do when an interrupt is received. */ | |
436 | ||
437 | static void | |
438 | interrupt_query () | |
439 | { | |
ebdb9ade | 440 | target_terminal_ours (); |
981a3309 | 441 | |
6b27ebe8 | 442 | if (query ("Interrupted while waiting for the program.\n\ |
ebdb9ade JK |
443 | Give up (and stop debugging it)? ")) |
444 | { | |
445 | target_mourn_inferior (); | |
e50ebec8 | 446 | return_to_top_level (RETURN_QUIT); |
ebdb9ade | 447 | } |
981a3309 SG |
448 | |
449 | target_terminal_inferior (); | |
ebdb9ade | 450 | } |
b543979c | 451 | |
bd5635a1 | 452 | /* Wait until the remote machine stops, then return, |
e1ce8aa5 JK |
453 | storing status in STATUS just as `wait' would. |
454 | Returns "pid" (though it's not clear what, if anything, that | |
455 | means in the case of this target). */ | |
bd5635a1 | 456 | |
b543979c | 457 | static int |
bd5635a1 RP |
458 | remote_wait (status) |
459 | WAITTYPE *status; | |
460 | { | |
461 | unsigned char buf[PBUFSIZ]; | |
8f86a4e4 | 462 | |
bd5635a1 | 463 | WSETEXIT ((*status), 0); |
b543979c | 464 | |
4f8a48e5 | 465 | while (1) |
8f86a4e4 | 466 | { |
4f8a48e5 | 467 | unsigned char *p; |
a03d4f8e | 468 | |
4f8a48e5 ILT |
469 | ofunc = (void (*)()) signal (SIGINT, remote_interrupt); |
470 | getpkt ((char *) buf, 1); | |
471 | signal (SIGINT, ofunc); | |
4ecee2f9 | 472 | |
4f8a48e5 ILT |
473 | if (buf[0] == 'E') |
474 | warning ("Remote failure reply: %s", buf); | |
475 | else if (buf[0] == 'T') | |
8f86a4e4 | 476 | { |
4f8a48e5 ILT |
477 | int i; |
478 | long regno; | |
479 | char regs[MAX_REGISTER_RAW_SIZE]; | |
a03d4f8e | 480 | |
4f8a48e5 ILT |
481 | /* Expedited reply, containing Signal, {regno, reg} repeat */ |
482 | /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where | |
483 | ss = signal number | |
484 | n... = register number | |
485 | r... = register contents | |
486 | */ | |
5af4f5f6 | 487 | |
4f8a48e5 | 488 | p = &buf[3]; /* after Txx */ |
5af4f5f6 | 489 | |
4f8a48e5 ILT |
490 | while (*p) |
491 | { | |
492 | unsigned char *p1; | |
5af4f5f6 | 493 | |
4f8a48e5 | 494 | regno = strtol (p, &p1, 16); /* Read the register number */ |
5af4f5f6 | 495 | |
4f8a48e5 ILT |
496 | if (p1 == p) |
497 | warning ("Remote sent badly formed register number: %s\nPacket: '%s'\n", | |
498 | p1, buf); | |
4ecee2f9 | 499 | |
4f8a48e5 | 500 | p = p1; |
4ecee2f9 | 501 | |
4f8a48e5 ILT |
502 | if (*p++ != ':') |
503 | warning ("Malformed packet (missing colon): %s\nPacket: '%s'\n", | |
504 | p, buf); | |
a03d4f8e | 505 | |
4f8a48e5 ILT |
506 | if (regno >= NUM_REGS) |
507 | warning ("Remote sent bad register number %d: %s\nPacket: '%s'\n", | |
508 | regno, p, buf); | |
509 | ||
510 | for (i = 0; i < REGISTER_RAW_SIZE (regno); i++) | |
511 | { | |
512 | if (p[0] == 0 || p[1] == 0) | |
513 | warning ("Remote reply is too short: %s", buf); | |
514 | regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]); | |
515 | p += 2; | |
516 | } | |
517 | ||
518 | if (*p++ != ';') | |
519 | warning ("Remote register badly formatted: %s", buf); | |
520 | ||
521 | supply_register (regno, regs); | |
522 | } | |
523 | break; | |
8f86a4e4 | 524 | } |
4f8a48e5 | 525 | else if (buf[0] == 'N') |
758aeb93 | 526 | { |
4f8a48e5 ILT |
527 | unsigned char *p1; |
528 | bfd_vma text_addr, data_addr, bss_addr; | |
529 | ||
530 | /* Relocate object file. Format is NAATT;DD;BB where AA is | |
531 | the signal number, TT is the new text address, DD is the | |
532 | new data address, and BB is the new bss address. This is | |
533 | used by the NLM stub; gdb may see more sections. */ | |
534 | p = &buf[3]; | |
981a3309 | 535 | text_addr = strtoul (p, &p1, 16); |
4f8a48e5 ILT |
536 | if (p1 == p || *p1 != ';') |
537 | warning ("Malformed relocation packet: Packet '%s'", buf); | |
538 | p = p1 + 1; | |
981a3309 | 539 | data_addr = strtoul (p, &p1, 16); |
4f8a48e5 ILT |
540 | if (p1 == p || *p1 != ';') |
541 | warning ("Malformed relocation packet: Packet '%s'", buf); | |
542 | p = p1 + 1; | |
981a3309 | 543 | bss_addr = strtoul (p, &p1, 16); |
4f8a48e5 ILT |
544 | if (p1 == p) |
545 | warning ("Malformed relocation packet: Packet '%s'", buf); | |
546 | ||
981a3309 SG |
547 | if (symfile_objfile != NULL |
548 | && (ANOFFSET (symfile_objfile->section_offsets, | |
549 | SECT_OFF_TEXT) != text_addr | |
550 | || ANOFFSET (symfile_objfile->section_offsets, | |
551 | SECT_OFF_DATA) != data_addr | |
552 | || ANOFFSET (symfile_objfile->section_offsets, | |
553 | SECT_OFF_BSS) != bss_addr)) | |
4f8a48e5 ILT |
554 | { |
555 | struct section_offsets *offs; | |
556 | ||
afa01c54 JK |
557 | /* FIXME: This code assumes gdb-stabs.h is being used; |
558 | it's broken for xcoff, dwarf, sdb-coff, etc. But | |
559 | there is no simple canonical representation for this | |
560 | stuff. (Just what does "text" as seen by the stub | |
561 | mean, anyway?). */ | |
562 | ||
4f8a48e5 | 563 | /* FIXME: Why don't the various symfile_offsets routines |
afa01c54 JK |
564 | in the sym_fns vectors set this? |
565 | (no good reason -kingdon). */ | |
4f8a48e5 ILT |
566 | if (symfile_objfile->num_sections == 0) |
567 | symfile_objfile->num_sections = SECT_OFF_MAX; | |
568 | ||
569 | offs = ((struct section_offsets *) | |
570 | alloca (sizeof (struct section_offsets) | |
571 | + (symfile_objfile->num_sections | |
572 | * sizeof (offs->offsets)))); | |
573 | memcpy (offs, symfile_objfile->section_offsets, | |
574 | (sizeof (struct section_offsets) | |
575 | + (symfile_objfile->num_sections | |
576 | * sizeof (offs->offsets)))); | |
577 | ANOFFSET (offs, SECT_OFF_TEXT) = text_addr; | |
578 | ANOFFSET (offs, SECT_OFF_DATA) = data_addr; | |
579 | ANOFFSET (offs, SECT_OFF_BSS) = bss_addr; | |
580 | ||
581 | objfile_relocate (symfile_objfile, offs); | |
981a3309 SG |
582 | { |
583 | struct obj_section *s; | |
584 | bfd *bfd; | |
585 | ||
586 | bfd = symfile_objfile->obfd; | |
587 | ||
588 | for (s = symfile_objfile->sections; | |
589 | s < symfile_objfile->sections_end; ++s) | |
590 | { | |
591 | flagword flags; | |
592 | ||
593 | flags = bfd_get_section_flags (bfd, s->sec_ptr); | |
594 | ||
595 | if (flags & SEC_CODE) | |
596 | { | |
597 | s->addr += text_addr; | |
598 | s->endaddr += text_addr; | |
599 | } | |
600 | else if (flags & (SEC_DATA | SEC_LOAD)) | |
601 | { | |
602 | s->addr += data_addr; | |
603 | s->endaddr += data_addr; | |
604 | } | |
605 | else if (flags & SEC_ALLOC) | |
606 | { | |
607 | s->addr += bss_addr; | |
608 | s->endaddr += bss_addr; | |
609 | } | |
610 | } | |
611 | } | |
4f8a48e5 ILT |
612 | } |
613 | break; | |
758aeb93 | 614 | } |
4f8a48e5 ILT |
615 | else if (buf[0] == 'W') |
616 | { | |
617 | /* The remote process exited. */ | |
618 | WSETEXIT (*status, (fromhex (buf[1]) << 4) + fromhex (buf[2])); | |
619 | return 0; | |
620 | } | |
621 | else if (buf[0] == 'S') | |
622 | break; | |
623 | else | |
624 | warning ("Invalid remote reply: %s", buf); | |
758aeb93 | 625 | } |
8f86a4e4 | 626 | |
bd5635a1 | 627 | WSETSTOP ((*status), (((fromhex (buf[1])) << 4) + (fromhex (buf[2])))); |
8f86a4e4 | 628 | |
e1ce8aa5 | 629 | return 0; |
bd5635a1 RP |
630 | } |
631 | ||
55fea07b JK |
632 | /* Number of bytes of registers this stub implements. */ |
633 | static int register_bytes_found; | |
634 | ||
bd5635a1 | 635 | /* Read the remote registers into the block REGS. */ |
e1ce8aa5 JK |
636 | /* Currently we just read all the registers, so we don't use regno. */ |
637 | /* ARGSUSED */ | |
b543979c | 638 | static void |
bd5635a1 RP |
639 | remote_fetch_registers (regno) |
640 | int regno; | |
641 | { | |
642 | char buf[PBUFSIZ]; | |
643 | int i; | |
644 | char *p; | |
645 | char regs[REGISTER_BYTES]; | |
646 | ||
647 | sprintf (buf, "g"); | |
648 | remote_send (buf); | |
649 | ||
55fea07b JK |
650 | /* Unimplemented registers read as all bits zero. */ |
651 | memset (regs, 0, REGISTER_BYTES); | |
652 | ||
981a3309 SG |
653 | /* We can get out of synch in various cases. If the first character |
654 | in the buffer is not a hex character, assume that has happened | |
655 | and try to fetch another packet to read. */ | |
656 | while ((buf[0] < '0' || buf[0] > '9') | |
657 | && (buf[0] < 'a' || buf[0] > 'f')) | |
658 | { | |
659 | if (sr_get_debug () > 0) | |
660 | printf ("Bad register packet; fetching a new packet\n"); | |
661 | getpkt (buf, 0); | |
662 | } | |
663 | ||
bd5635a1 RP |
664 | /* Reply describes registers byte by byte, each byte encoded as two |
665 | hex characters. Suck them all up, then supply them to the | |
666 | register cacheing/storage mechanism. */ | |
667 | ||
668 | p = buf; | |
669 | for (i = 0; i < REGISTER_BYTES; i++) | |
670 | { | |
55fea07b JK |
671 | if (p[0] == 0) |
672 | break; | |
673 | if (p[1] == 0) | |
674 | { | |
675 | warning ("Remote reply is of odd length: %s", buf); | |
676 | /* Don't change register_bytes_found in this case, and don't | |
677 | print a second warning. */ | |
678 | goto supply_them; | |
679 | } | |
bd5635a1 RP |
680 | regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]); |
681 | p += 2; | |
682 | } | |
55fea07b JK |
683 | |
684 | if (i != register_bytes_found) | |
685 | { | |
686 | register_bytes_found = i; | |
687 | #ifdef REGISTER_BYTES_OK | |
688 | if (!REGISTER_BYTES_OK (i)) | |
689 | warning ("Remote reply is too short: %s", buf); | |
690 | #endif | |
691 | } | |
692 | ||
693 | supply_them: | |
bd5635a1 RP |
694 | for (i = 0; i < NUM_REGS; i++) |
695 | supply_register (i, ®s[REGISTER_BYTE(i)]); | |
bd5635a1 RP |
696 | } |
697 | ||
698 | /* Prepare to store registers. Since we send them all, we have to | |
699 | read out the ones we don't want to change first. */ | |
700 | ||
b543979c | 701 | static void |
bd5635a1 RP |
702 | remote_prepare_to_store () |
703 | { | |
34517ebc JG |
704 | /* Make sure the entire registers array is valid. */ |
705 | read_register_bytes (0, (char *)NULL, REGISTER_BYTES); | |
bd5635a1 RP |
706 | } |
707 | ||
708 | /* Store the remote registers from the contents of the block REGISTERS. | |
709 | FIXME, eventually just store one register if that's all that is needed. */ | |
710 | ||
e1ce8aa5 | 711 | /* ARGSUSED */ |
b543979c | 712 | static void |
bd5635a1 RP |
713 | remote_store_registers (regno) |
714 | int regno; | |
715 | { | |
716 | char buf[PBUFSIZ]; | |
717 | int i; | |
718 | char *p; | |
719 | ||
720 | buf[0] = 'G'; | |
721 | ||
722 | /* Command describes registers byte by byte, | |
723 | each byte encoded as two hex characters. */ | |
724 | ||
725 | p = buf + 1; | |
55fea07b JK |
726 | /* remote_prepare_to_store insures that register_bytes_found gets set. */ |
727 | for (i = 0; i < register_bytes_found; i++) | |
bd5635a1 RP |
728 | { |
729 | *p++ = tohex ((registers[i] >> 4) & 0xf); | |
730 | *p++ = tohex (registers[i] & 0xf); | |
731 | } | |
732 | *p = '\0'; | |
733 | ||
734 | remote_send (buf); | |
bd5635a1 RP |
735 | } |
736 | ||
b43e0347 JK |
737 | #if 0 |
738 | ||
739 | /* Use of the data cache is disabled because it loses for looking at | |
740 | and changing hardware I/O ports and the like. Accepting `volatile' | |
741 | would perhaps be one way to fix it, but a better way which would | |
742 | win for more cases would be to use the executable file for the text | |
743 | segment, like the `icache' code below but done cleanly (in some | |
744 | target-independent place, perhaps in target_xfer_memory, perhaps | |
745 | based on assigning each target a speed or perhaps by some simpler | |
746 | mechanism). */ | |
747 | ||
bd5635a1 RP |
748 | /* Read a word from remote address ADDR and return it. |
749 | This goes through the data cache. */ | |
750 | ||
b43e0347 | 751 | static int |
bd5635a1 RP |
752 | remote_fetch_word (addr) |
753 | CORE_ADDR addr; | |
754 | { | |
d538b510 | 755 | #if 0 |
bd5635a1 RP |
756 | if (icache) |
757 | { | |
758 | extern CORE_ADDR text_start, text_end; | |
759 | ||
760 | if (addr >= text_start && addr < text_end) | |
761 | { | |
762 | int buffer; | |
763 | xfer_core_file (addr, &buffer, sizeof (int)); | |
764 | return buffer; | |
765 | } | |
766 | } | |
d538b510 RP |
767 | #endif |
768 | return dcache_fetch (remote_dcache, addr); | |
bd5635a1 RP |
769 | } |
770 | ||
771 | /* Write a word WORD into remote address ADDR. | |
772 | This goes through the data cache. */ | |
773 | ||
b43e0347 | 774 | static void |
bd5635a1 RP |
775 | remote_store_word (addr, word) |
776 | CORE_ADDR addr; | |
777 | int word; | |
778 | { | |
d538b510 | 779 | dcache_poke (remote_dcache, addr, word); |
bd5635a1 | 780 | } |
b43e0347 | 781 | #endif /* 0 */ |
bd5635a1 RP |
782 | \f |
783 | /* Write memory data directly to the remote machine. | |
784 | This does not inform the data cache; the data cache uses this. | |
785 | MEMADDR is the address in the remote memory space. | |
786 | MYADDR is the address of the buffer in our space. | |
d538b510 | 787 | LEN is the number of bytes. |
bd5635a1 | 788 | |
d538b510 RP |
789 | Returns number of bytes transferred, or 0 for error. */ |
790 | ||
791 | static int | |
bd5635a1 RP |
792 | remote_write_bytes (memaddr, myaddr, len) |
793 | CORE_ADDR memaddr; | |
d538b510 | 794 | unsigned char *myaddr; |
bd5635a1 RP |
795 | int len; |
796 | { | |
797 | char buf[PBUFSIZ]; | |
798 | int i; | |
799 | char *p; | |
800 | ||
801 | if (len > PBUFSIZ / 2 - 20) | |
802 | abort (); | |
803 | ||
804 | sprintf (buf, "M%x,%x:", memaddr, len); | |
805 | ||
b543979c | 806 | /* We send target system values byte by byte, in increasing byte addresses, |
bd5635a1 RP |
807 | each byte encoded as two hex characters. */ |
808 | ||
809 | p = buf + strlen (buf); | |
810 | for (i = 0; i < len; i++) | |
811 | { | |
812 | *p++ = tohex ((myaddr[i] >> 4) & 0xf); | |
813 | *p++ = tohex (myaddr[i] & 0xf); | |
814 | } | |
815 | *p = '\0'; | |
816 | ||
d538b510 RP |
817 | putpkt (buf); |
818 | getpkt (buf, 0); | |
819 | ||
820 | if (buf[0] == 'E') | |
821 | { | |
822 | /* There is no correspondance between what the remote protocol uses | |
823 | for errors and errno codes. We would like a cleaner way of | |
824 | representing errors (big enough to include errno codes, bfd_error | |
825 | codes, and others). But for now just return EIO. */ | |
826 | errno = EIO; | |
827 | return 0; | |
828 | } | |
829 | return len; | |
bd5635a1 RP |
830 | } |
831 | ||
832 | /* Read memory data directly from the remote machine. | |
833 | This does not use the data cache; the data cache uses this. | |
834 | MEMADDR is the address in the remote memory space. | |
835 | MYADDR is the address of the buffer in our space. | |
d538b510 | 836 | LEN is the number of bytes. |
bd5635a1 | 837 | |
d538b510 RP |
838 | Returns number of bytes transferred, or 0 for error. */ |
839 | ||
840 | static int | |
bd5635a1 RP |
841 | remote_read_bytes (memaddr, myaddr, len) |
842 | CORE_ADDR memaddr; | |
d538b510 | 843 | unsigned char *myaddr; |
bd5635a1 RP |
844 | int len; |
845 | { | |
846 | char buf[PBUFSIZ]; | |
847 | int i; | |
848 | char *p; | |
849 | ||
850 | if (len > PBUFSIZ / 2 - 1) | |
851 | abort (); | |
852 | ||
853 | sprintf (buf, "m%x,%x", memaddr, len); | |
d538b510 RP |
854 | putpkt (buf); |
855 | getpkt (buf, 0); | |
856 | ||
857 | if (buf[0] == 'E') | |
858 | { | |
859 | /* There is no correspondance between what the remote protocol uses | |
860 | for errors and errno codes. We would like a cleaner way of | |
861 | representing errors (big enough to include errno codes, bfd_error | |
862 | codes, and others). But for now just return EIO. */ | |
863 | errno = EIO; | |
864 | return 0; | |
865 | } | |
bd5635a1 | 866 | |
b543979c | 867 | /* Reply describes memory byte by byte, |
bd5635a1 RP |
868 | each byte encoded as two hex characters. */ |
869 | ||
870 | p = buf; | |
871 | for (i = 0; i < len; i++) | |
872 | { | |
873 | if (p[0] == 0 || p[1] == 0) | |
d538b510 RP |
874 | /* Reply is short. This means that we were able to read only part |
875 | of what we wanted to. */ | |
876 | break; | |
bd5635a1 RP |
877 | myaddr[i] = fromhex (p[0]) * 16 + fromhex (p[1]); |
878 | p += 2; | |
879 | } | |
d538b510 | 880 | return i; |
bd5635a1 RP |
881 | } |
882 | \f | |
883 | /* Read or write LEN bytes from inferior memory at MEMADDR, transferring | |
e1ce8aa5 | 884 | to or from debugger address MYADDR. Write to inferior if SHOULD_WRITE is |
bd5635a1 RP |
885 | nonzero. Returns length of data written or read; 0 for error. */ |
886 | ||
b543979c JG |
887 | /* ARGSUSED */ |
888 | static int | |
889 | remote_xfer_memory(memaddr, myaddr, len, should_write, target) | |
bd5635a1 RP |
890 | CORE_ADDR memaddr; |
891 | char *myaddr; | |
892 | int len; | |
e1ce8aa5 | 893 | int should_write; |
b543979c | 894 | struct target_ops *target; /* ignored */ |
bd5635a1 | 895 | { |
bd5635a1 | 896 | int xfersize; |
d538b510 RP |
897 | int bytes_xferred; |
898 | int total_xferred = 0; | |
899 | ||
bd5635a1 RP |
900 | while (len > 0) |
901 | { | |
902 | if (len > MAXBUFBYTES) | |
903 | xfersize = MAXBUFBYTES; | |
904 | else | |
905 | xfersize = len; | |
906 | ||
e1ce8aa5 | 907 | if (should_write) |
d538b510 | 908 | bytes_xferred = remote_write_bytes (memaddr, myaddr, xfersize); |
bd5635a1 | 909 | else |
d538b510 RP |
910 | bytes_xferred = remote_read_bytes (memaddr, myaddr, xfersize); |
911 | ||
912 | /* If we get an error, we are done xferring. */ | |
913 | if (bytes_xferred == 0) | |
914 | break; | |
915 | ||
916 | memaddr += bytes_xferred; | |
917 | myaddr += bytes_xferred; | |
918 | len -= bytes_xferred; | |
919 | total_xferred += bytes_xferred; | |
bd5635a1 | 920 | } |
d538b510 | 921 | return total_xferred; |
bd5635a1 RP |
922 | } |
923 | ||
b543979c | 924 | static void |
8f86a4e4 | 925 | remote_files_info (ignore) |
5af4f5f6 | 926 | struct target_ops *ignore; |
bd5635a1 | 927 | { |
7c622b41 | 928 | puts_filtered ("Debugging a target over a serial line.\n"); |
bd5635a1 RP |
929 | } |
930 | \f | |
e50ebec8 JK |
931 | /* Stuff for dealing with the packets which are part of this protocol. |
932 | See comment at top of file for details. */ | |
bd5635a1 | 933 | |
ebdb9ade | 934 | /* Read a single character from the remote end, masking it down to 7 bits. */ |
b543979c | 935 | |
bd5635a1 RP |
936 | static int |
937 | readchar () | |
938 | { | |
ebdb9ade | 939 | int ch; |
bd5635a1 | 940 | |
ebdb9ade | 941 | ch = SERIAL_READCHAR (remote_desc, timeout); |
fce7f2d9 | 942 | |
ebdb9ade JK |
943 | if (ch < 0) |
944 | return ch; | |
bd5635a1 | 945 | |
ebdb9ade | 946 | return ch & 0x7f; |
bd5635a1 RP |
947 | } |
948 | ||
949 | /* Send the command in BUF to the remote machine, | |
950 | and read the reply into BUF. | |
951 | Report an error if we get an error reply. */ | |
952 | ||
953 | static void | |
954 | remote_send (buf) | |
955 | char *buf; | |
956 | { | |
957 | ||
958 | putpkt (buf); | |
7c622b41 | 959 | getpkt (buf, 0); |
bd5635a1 RP |
960 | |
961 | if (buf[0] == 'E') | |
962 | error ("Remote failure reply: %s", buf); | |
963 | } | |
964 | ||
965 | /* Send a packet to the remote machine, with error checking. | |
966 | The data of the packet is in BUF. */ | |
967 | ||
968 | static void | |
969 | putpkt (buf) | |
970 | char *buf; | |
971 | { | |
972 | int i; | |
973 | unsigned char csum = 0; | |
b543979c | 974 | char buf2[PBUFSIZ]; |
bd5635a1 | 975 | int cnt = strlen (buf); |
ebdb9ade | 976 | int ch; |
bd5635a1 RP |
977 | char *p; |
978 | ||
979 | /* Copy the packet into buffer BUF2, encapsulating it | |
980 | and giving it a checksum. */ | |
981 | ||
b543979c JG |
982 | if (cnt > sizeof(buf2) - 5) /* Prosanity check */ |
983 | abort(); | |
984 | ||
bd5635a1 RP |
985 | p = buf2; |
986 | *p++ = '$'; | |
987 | ||
988 | for (i = 0; i < cnt; i++) | |
989 | { | |
990 | csum += buf[i]; | |
991 | *p++ = buf[i]; | |
992 | } | |
993 | *p++ = '#'; | |
994 | *p++ = tohex ((csum >> 4) & 0xf); | |
995 | *p++ = tohex (csum & 0xf); | |
996 | ||
997 | /* Send it over and over until we get a positive ack. */ | |
998 | ||
6b27ebe8 JK |
999 | while (1) |
1000 | { | |
66a48870 | 1001 | if (sr_get_debug ()) |
6b27ebe8 JK |
1002 | { |
1003 | *p = '\0'; | |
1004 | printf ("Sending packet: %s...", buf2); fflush(stdout); | |
1005 | } | |
1006 | if (SERIAL_WRITE (remote_desc, buf2, p - buf2)) | |
1007 | perror_with_name ("putpkt: write failed"); | |
1008 | ||
1009 | /* read until either a timeout occurs (-2) or '+' is read */ | |
1010 | while (1) | |
1011 | { | |
1012 | ch = readchar (); | |
1013 | ||
1014 | switch (ch) | |
1015 | { | |
1016 | case '+': | |
66a48870 | 1017 | if (sr_get_debug ()) |
6b27ebe8 JK |
1018 | printf("Ack\n"); |
1019 | return; | |
1020 | case SERIAL_TIMEOUT: | |
1021 | break; /* Retransmit buffer */ | |
1022 | case SERIAL_ERROR: | |
1023 | perror_with_name ("putpkt: couldn't read ACK"); | |
1024 | case SERIAL_EOF: | |
1025 | error ("putpkt: EOF while trying to read ACK"); | |
1026 | default: | |
66a48870 | 1027 | if (sr_get_debug ()) |
6b27ebe8 JK |
1028 | printf ("%02X %c ", ch&0xFF, ch); |
1029 | continue; | |
1030 | } | |
1031 | break; /* Here to retransmit */ | |
1032 | } | |
981a3309 SG |
1033 | |
1034 | if (quit_flag) | |
1035 | { | |
1036 | quit_flag = 0; | |
1037 | interrupt_query (); | |
1038 | } | |
6b27ebe8 | 1039 | } |
bd5635a1 RP |
1040 | } |
1041 | ||
1042 | /* Read a packet from the remote machine, with error checking, | |
7c622b41 JG |
1043 | and store it in BUF. BUF is expected to be of size PBUFSIZ. |
1044 | If FOREVER, wait forever rather than timing out; this is used | |
1045 | while the target is executing user code. */ | |
bd5635a1 RP |
1046 | |
1047 | static void | |
7c622b41 | 1048 | getpkt (buf, forever) |
bd5635a1 | 1049 | char *buf; |
ebdb9ade | 1050 | int forever; |
bd5635a1 RP |
1051 | { |
1052 | char *bp; | |
1053 | unsigned char csum; | |
7c622b41 | 1054 | int c = 0; |
bd5635a1 | 1055 | unsigned char c1, c2; |
38094c60 JG |
1056 | int retries = 0; |
1057 | #define MAX_RETRIES 10 | |
bd5635a1 | 1058 | |
bd5635a1 RP |
1059 | while (1) |
1060 | { | |
981a3309 SG |
1061 | if (quit_flag) |
1062 | { | |
1063 | quit_flag = 0; | |
1064 | interrupt_query (); | |
1065 | } | |
1066 | ||
7c622b41 JG |
1067 | /* This can loop forever if the remote side sends us characters |
1068 | continuously, but if it pauses, we'll get a zero from readchar | |
1069 | because of timeout. Then we'll count that as a retry. */ | |
6b27ebe8 JK |
1070 | |
1071 | c = readchar(); | |
1072 | if (c > 0 && c != '$') | |
1073 | continue; | |
1074 | ||
1075 | if (c == SERIAL_TIMEOUT) | |
1076 | { | |
1077 | if (forever) | |
1078 | continue; | |
1079 | if (++retries >= MAX_RETRIES) | |
66a48870 | 1080 | if (sr_get_debug ()) puts_filtered ("Timed out.\n"); |
6b27ebe8 JK |
1081 | goto out; |
1082 | } | |
1083 | ||
1084 | if (c == SERIAL_EOF) | |
1085 | error ("Remote connection closed"); | |
1086 | if (c == SERIAL_ERROR) | |
1087 | perror_with_name ("Remote communication error"); | |
7c622b41 | 1088 | |
bd5635a1 RP |
1089 | /* Force csum to be zero here because of possible error retry. */ |
1090 | csum = 0; | |
bd5635a1 | 1091 | bp = buf; |
7c622b41 | 1092 | |
bd5635a1 RP |
1093 | while (1) |
1094 | { | |
1095 | c = readchar (); | |
ebdb9ade | 1096 | if (c == SERIAL_TIMEOUT) |
7c622b41 | 1097 | { |
66a48870 | 1098 | if (sr_get_debug ()) |
7c622b41 JG |
1099 | puts_filtered ("Timeout in mid-packet, retrying\n"); |
1100 | goto whole; /* Start a new packet, count retries */ | |
1101 | } | |
1102 | if (c == '$') | |
1103 | { | |
66a48870 | 1104 | if (sr_get_debug ()) |
7c622b41 JG |
1105 | puts_filtered ("Saw new packet start in middle of old one\n"); |
1106 | goto whole; /* Start a new packet, count retries */ | |
1107 | } | |
bd5635a1 RP |
1108 | if (c == '#') |
1109 | break; | |
8f86a4e4 JG |
1110 | if (bp >= buf+PBUFSIZ-1) |
1111 | { | |
1112 | *bp = '\0'; | |
7c622b41 JG |
1113 | puts_filtered ("Remote packet too long: "); |
1114 | puts_filtered (buf); | |
1115 | puts_filtered ("\n"); | |
8f86a4e4 JG |
1116 | goto whole; |
1117 | } | |
bd5635a1 RP |
1118 | *bp++ = c; |
1119 | csum += c; | |
1120 | } | |
1121 | *bp = 0; | |
1122 | ||
1123 | c1 = fromhex (readchar ()); | |
1124 | c2 = fromhex (readchar ()); | |
1125 | if ((csum & 0xff) == (c1 << 4) + c2) | |
1126 | break; | |
7c622b41 JG |
1127 | printf_filtered ("Bad checksum, sentsum=0x%x, csum=0x%x, buf=", |
1128 | (c1 << 4) + c2, csum & 0xff); | |
1129 | puts_filtered (buf); | |
1130 | puts_filtered ("\n"); | |
38094c60 | 1131 | |
8f86a4e4 JG |
1132 | /* Try the whole thing again. */ |
1133 | whole: | |
38094c60 JG |
1134 | if (++retries < MAX_RETRIES) |
1135 | { | |
ebdb9ade | 1136 | SERIAL_WRITE (remote_desc, "-", 1); |
38094c60 JG |
1137 | } |
1138 | else | |
1139 | { | |
1140 | printf ("Ignoring packet error, continuing...\n"); | |
1141 | break; | |
1142 | } | |
bd5635a1 RP |
1143 | } |
1144 | ||
7c622b41 JG |
1145 | out: |
1146 | ||
ebdb9ade | 1147 | SERIAL_WRITE (remote_desc, "+", 1); |
bd5635a1 | 1148 | |
66a48870 | 1149 | if (sr_get_debug ()) |
8f86a4e4 | 1150 | fprintf (stderr,"Packet received: %s\n", buf); |
bd5635a1 RP |
1151 | } |
1152 | \f | |
ebdb9ade JK |
1153 | static void |
1154 | remote_kill () | |
1155 | { | |
1156 | putpkt ("k"); | |
1157 | /* Don't wait for it to die. I'm not really sure it matters whether | |
1158 | we do or not. For the existing stubs, kill is a noop. */ | |
1159 | target_mourn_inferior (); | |
1160 | } | |
bd5635a1 | 1161 | |
ebdb9ade JK |
1162 | static void |
1163 | remote_mourn () | |
1164 | { | |
1165 | unpush_target (&remote_ops); | |
1166 | generic_mourn_inferior (); | |
1167 | } | |
1168 | \f | |
5af4f5f6 JK |
1169 | #ifdef REMOTE_BREAKPOINT |
1170 | ||
1171 | /* On some machines, e.g. 68k, we may use a different breakpoint instruction | |
1172 | than other targets. */ | |
1173 | static unsigned char break_insn[] = REMOTE_BREAKPOINT; | |
1174 | ||
1175 | /* Check that it fits in BREAKPOINT_MAX bytes. */ | |
1176 | static unsigned char check_break_insn_size[BREAKPOINT_MAX] = REMOTE_BREAKPOINT; | |
1177 | ||
1178 | #else /* No REMOTE_BREAKPOINT. */ | |
1179 | ||
1180 | /* Same old breakpoint instruction. This code does nothing different | |
1181 | than mem-break.c. */ | |
1182 | static unsigned char break_insn[] = BREAKPOINT; | |
1183 | ||
1184 | #endif /* No REMOTE_BREAKPOINT. */ | |
1185 | ||
1186 | /* Insert a breakpoint on targets that don't have any better breakpoint | |
1187 | support. We read the contents of the target location and stash it, | |
1188 | then overwrite it with a breakpoint instruction. ADDR is the target | |
1189 | location in the target machine. CONTENTS_CACHE is a pointer to | |
1190 | memory allocated for saving the target contents. It is guaranteed | |
1191 | by the caller to be long enough to save sizeof BREAKPOINT bytes (this | |
1192 | is accomplished via BREAKPOINT_MAX). */ | |
1193 | ||
d538b510 | 1194 | static int |
5af4f5f6 JK |
1195 | remote_insert_breakpoint (addr, contents_cache) |
1196 | CORE_ADDR addr; | |
1197 | char *contents_cache; | |
1198 | { | |
1199 | int val; | |
1200 | ||
1201 | val = target_read_memory (addr, contents_cache, sizeof break_insn); | |
1202 | ||
1203 | if (val == 0) | |
1204 | val = target_write_memory (addr, (char *)break_insn, sizeof break_insn); | |
1205 | ||
1206 | return val; | |
1207 | } | |
1208 | ||
d538b510 | 1209 | static int |
5af4f5f6 JK |
1210 | remote_remove_breakpoint (addr, contents_cache) |
1211 | CORE_ADDR addr; | |
1212 | char *contents_cache; | |
1213 | { | |
1214 | return target_write_memory (addr, contents_cache, sizeof break_insn); | |
1215 | } | |
1216 | \f | |
bd5635a1 RP |
1217 | /* Define the target subroutine names */ |
1218 | ||
1219 | struct target_ops remote_ops = { | |
b543979c JG |
1220 | "remote", /* to_shortname */ |
1221 | "Remote serial target in gdb-specific protocol", /* to_longname */ | |
1222 | "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ | |
1223 | Specify the serial device it is connected to (e.g. /dev/ttya).", /* to_doc */ | |
1224 | remote_open, /* to_open */ | |
1225 | remote_close, /* to_close */ | |
1226 | NULL, /* to_attach */ | |
1227 | remote_detach, /* to_detach */ | |
1228 | remote_resume, /* to_resume */ | |
1229 | remote_wait, /* to_wait */ | |
1230 | remote_fetch_registers, /* to_fetch_registers */ | |
1231 | remote_store_registers, /* to_store_registers */ | |
1232 | remote_prepare_to_store, /* to_prepare_to_store */ | |
b543979c JG |
1233 | remote_xfer_memory, /* to_xfer_memory */ |
1234 | remote_files_info, /* to_files_info */ | |
5af4f5f6 JK |
1235 | |
1236 | remote_insert_breakpoint, /* to_insert_breakpoint */ | |
1237 | remote_remove_breakpoint, /* to_remove_breakpoint */ | |
1238 | ||
b543979c JG |
1239 | NULL, /* to_terminal_init */ |
1240 | NULL, /* to_terminal_inferior */ | |
1241 | NULL, /* to_terminal_ours_for_output */ | |
1242 | NULL, /* to_terminal_ours */ | |
1243 | NULL, /* to_terminal_info */ | |
ebdb9ade | 1244 | remote_kill, /* to_kill */ |
6b27ebe8 | 1245 | generic_load, /* to_load */ |
b543979c JG |
1246 | NULL, /* to_lookup_symbol */ |
1247 | NULL, /* to_create_inferior */ | |
ebdb9ade | 1248 | remote_mourn, /* to_mourn_inferior */ |
34517ebc | 1249 | 0, /* to_can_run */ |
7c622b41 | 1250 | 0, /* to_notice_signals */ |
b543979c JG |
1251 | process_stratum, /* to_stratum */ |
1252 | NULL, /* to_next */ | |
1253 | 1, /* to_has_all_memory */ | |
1254 | 1, /* to_has_memory */ | |
1255 | 1, /* to_has_stack */ | |
1256 | 1, /* to_has_registers */ | |
1257 | 1, /* to_has_execution */ | |
1258 | NULL, /* sections */ | |
1259 | NULL, /* sections_end */ | |
1260 | OPS_MAGIC /* to_magic */ | |
bd5635a1 RP |
1261 | }; |
1262 | ||
1263 | void | |
1264 | _initialize_remote () | |
1265 | { | |
1266 | add_target (&remote_ops); | |
1267 | } | |
8f86a4e4 | 1268 | #endif |