Commit | Line | Data |
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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 RP |
135 | #include "dcache.h" |
136 | ||
8f86a4e4 | 137 | #if !defined(DONT_USE_REMOTE) |
bd5635a1 RP |
138 | #ifdef USG |
139 | #include <sys/types.h> | |
140 | #endif | |
141 | ||
142 | #include <signal.h> | |
ebdb9ade | 143 | #include "serial.h" |
bd5635a1 | 144 | |
b543979c JG |
145 | /* Prototypes for local functions */ |
146 | ||
d538b510 RP |
147 | static int |
148 | remote_write_bytes PARAMS ((CORE_ADDR memaddr, unsigned char *myaddr, int len)); | |
b543979c | 149 | |
d538b510 RP |
150 | static int |
151 | remote_read_bytes PARAMS ((CORE_ADDR memaddr, unsigned char *myaddr, int len)); | |
b543979c JG |
152 | |
153 | static void | |
5af4f5f6 | 154 | remote_files_info PARAMS ((struct target_ops *ignore)); |
b543979c JG |
155 | |
156 | static int | |
5af4f5f6 JK |
157 | remote_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, int len, |
158 | int should_write, struct target_ops *target)); | |
b543979c JG |
159 | |
160 | static void | |
161 | remote_prepare_to_store PARAMS ((void)); | |
162 | ||
163 | static void | |
5af4f5f6 | 164 | remote_fetch_registers PARAMS ((int regno)); |
b543979c JG |
165 | |
166 | static void | |
d538b510 | 167 | remote_resume PARAMS ((int pid, int step, int siggnal)); |
b543979c | 168 | |
7c622b41 | 169 | static int |
5af4f5f6 | 170 | remote_start_remote PARAMS ((char *dummy)); |
7c622b41 | 171 | |
b543979c | 172 | static void |
5af4f5f6 | 173 | remote_open PARAMS ((char *name, int from_tty)); |
b543979c JG |
174 | |
175 | static void | |
5af4f5f6 | 176 | remote_close PARAMS ((int quitting)); |
b543979c JG |
177 | |
178 | static void | |
5af4f5f6 | 179 | remote_store_registers PARAMS ((int regno)); |
b543979c JG |
180 | |
181 | static void | |
5af4f5f6 | 182 | getpkt PARAMS ((char *buf, int forever)); |
b543979c JG |
183 | |
184 | static void | |
5af4f5f6 | 185 | putpkt PARAMS ((char *buf)); |
b543979c JG |
186 | |
187 | static void | |
5af4f5f6 | 188 | remote_send PARAMS ((char *buf)); |
b543979c JG |
189 | |
190 | static int | |
191 | readchar PARAMS ((void)); | |
192 | ||
193 | static int | |
5af4f5f6 | 194 | remote_wait PARAMS ((WAITTYPE *status)); |
b543979c JG |
195 | |
196 | static int | |
5af4f5f6 | 197 | tohex PARAMS ((int nib)); |
b543979c JG |
198 | |
199 | static int | |
5af4f5f6 | 200 | fromhex PARAMS ((int a)); |
b543979c JG |
201 | |
202 | static void | |
5af4f5f6 JK |
203 | remote_detach PARAMS ((char *args, int from_tty)); |
204 | ||
205 | static void | |
206 | remote_interrupt PARAMS ((int signo)); | |
207 | ||
208 | static void | |
209 | remote_interrupt_twice PARAMS ((int signo)); | |
b543979c | 210 | |
bd5635a1 RP |
211 | extern struct target_ops remote_ops; /* Forward decl */ |
212 | ||
ebdb9ade JK |
213 | /* This was 5 seconds, which is a long time to sit and wait. |
214 | Unless this is going though some terminal server or multiplexer or | |
215 | other form of hairy serial connection, I would think 2 seconds would | |
216 | be plenty. */ | |
217 | static int timeout = 2; | |
bd5635a1 RP |
218 | |
219 | #if 0 | |
220 | int icache; | |
221 | #endif | |
222 | ||
55fea07b JK |
223 | /* FIXME: This is a hack which lets this file compile. It should be getting |
224 | this setting from remote-utils.c. */ | |
225 | #define remote_debug (0) | |
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 | ||
55fea07b JK |
300 | #if 0 |
301 | /* FIXME: This should be using remote-utils.c. */ | |
b543979c JG |
302 | if (baud_rate) |
303 | { | |
ebdb9ade | 304 | int rate; |
b543979c | 305 | |
ebdb9ade JK |
306 | if (sscanf (baud_rate, "%d", &rate) == 1) |
307 | if (SERIAL_SETBAUDRATE (remote_desc, rate)) | |
308 | { | |
309 | SERIAL_CLOSE (remote_desc); | |
310 | perror_with_name (name); | |
311 | } | |
b543979c | 312 | } |
55fea07b | 313 | #endif |
ebdb9ade JK |
314 | |
315 | SERIAL_RAW (remote_desc); | |
bd5635a1 RP |
316 | |
317 | if (from_tty) | |
7c622b41 JG |
318 | { |
319 | puts_filtered ("Remote debugging using "); | |
320 | puts_filtered (name); | |
321 | puts_filtered ("\n"); | |
322 | } | |
bd5635a1 | 323 | push_target (&remote_ops); /* Switch to using remote target now */ |
bd5635a1 | 324 | |
ac7a377f JK |
325 | /* Start the remote connection; if error (0), discard this target. |
326 | In particular, if the user quits, be sure to discard it | |
327 | (we'd be in an inconsistent state otherwise). */ | |
7c622b41 | 328 | if (!catch_errors (remote_start_remote, (char *)0, |
e50ebec8 | 329 | "Couldn't establish connection to remote target\n", RETURN_MASK_ALL)) |
7c622b41 | 330 | pop_target(); |
bd5635a1 RP |
331 | } |
332 | ||
333 | /* remote_detach() | |
334 | takes a program previously attached to and detaches it. | |
335 | We better not have left any breakpoints | |
336 | in the program or it'll die when it hits one. | |
337 | Close the open connection to the remote debugger. | |
338 | Use this when you want to detach and do something else | |
339 | with your gdb. */ | |
340 | ||
341 | static void | |
342 | remote_detach (args, from_tty) | |
343 | char *args; | |
344 | int from_tty; | |
345 | { | |
346 | if (args) | |
347 | error ("Argument given to \"detach\" when remotely debugging."); | |
348 | ||
349 | pop_target (); | |
350 | if (from_tty) | |
7c622b41 | 351 | puts_filtered ("Ending remote debugging.\n"); |
bd5635a1 RP |
352 | } |
353 | ||
354 | /* Convert hex digit A to a number. */ | |
355 | ||
356 | static int | |
357 | fromhex (a) | |
358 | int a; | |
359 | { | |
360 | if (a >= '0' && a <= '9') | |
361 | return a - '0'; | |
362 | else if (a >= 'a' && a <= 'f') | |
363 | return a - 'a' + 10; | |
364 | else | |
365 | error ("Reply contains invalid hex digit"); | |
366 | return -1; | |
367 | } | |
368 | ||
369 | /* Convert number NIB to a hex digit. */ | |
370 | ||
371 | static int | |
372 | tohex (nib) | |
373 | int nib; | |
374 | { | |
375 | if (nib < 10) | |
376 | return '0'+nib; | |
377 | else | |
378 | return 'a'+nib-10; | |
379 | } | |
380 | \f | |
381 | /* Tell the remote machine to resume. */ | |
382 | ||
b543979c | 383 | static void |
d538b510 RP |
384 | remote_resume (pid, step, siggnal) |
385 | int pid, step, siggnal; | |
bd5635a1 RP |
386 | { |
387 | char buf[PBUFSIZ]; | |
388 | ||
389 | if (siggnal) | |
ebdb9ade JK |
390 | { |
391 | char *name; | |
392 | target_terminal_ours_for_output (); | |
393 | printf_filtered ("Can't send signals to a remote system. "); | |
394 | name = strsigno (siggnal); | |
395 | if (name) | |
396 | printf_filtered (name); | |
397 | else | |
398 | printf_filtered ("Signal %d", siggnal); | |
399 | printf_filtered (" not sent.\n"); | |
400 | target_terminal_inferior (); | |
401 | } | |
bd5635a1 | 402 | |
d538b510 | 403 | dcache_flush (remote_dcache); |
bd5635a1 RP |
404 | |
405 | strcpy (buf, step ? "s": "c"); | |
406 | ||
407 | putpkt (buf); | |
408 | } | |
ebdb9ade | 409 | \f |
b543979c JG |
410 | /* Send ^C to target to halt it. Target will respond, and send us a |
411 | packet. */ | |
412 | ||
5af4f5f6 JK |
413 | static void |
414 | remote_interrupt (signo) | |
e676a15f | 415 | int signo; |
b543979c | 416 | { |
ebdb9ade JK |
417 | /* If this doesn't work, try more severe steps. */ |
418 | signal (signo, remote_interrupt_twice); | |
8f86a4e4 | 419 | |
d538b510 | 420 | if (remote_debug) |
8f86a4e4 JG |
421 | printf ("remote_interrupt called\n"); |
422 | ||
ebdb9ade | 423 | SERIAL_WRITE (remote_desc, "\003", 1); /* Send a ^C */ |
b543979c JG |
424 | } |
425 | ||
5af4f5f6 JK |
426 | static void (*ofunc)(); |
427 | ||
ebdb9ade JK |
428 | /* The user typed ^C twice. */ |
429 | static void | |
430 | remote_interrupt_twice (signo) | |
431 | int signo; | |
432 | { | |
433 | signal (signo, ofunc); | |
434 | ||
435 | target_terminal_ours (); | |
6b27ebe8 | 436 | if (query ("Interrupted while waiting for the program.\n\ |
ebdb9ade JK |
437 | Give up (and stop debugging it)? ")) |
438 | { | |
439 | target_mourn_inferior (); | |
e50ebec8 | 440 | return_to_top_level (RETURN_QUIT); |
ebdb9ade JK |
441 | } |
442 | else | |
443 | { | |
444 | signal (signo, remote_interrupt); | |
445 | target_terminal_inferior (); | |
446 | } | |
447 | } | |
b543979c | 448 | |
bd5635a1 | 449 | /* Wait until the remote machine stops, then return, |
e1ce8aa5 JK |
450 | storing status in STATUS just as `wait' would. |
451 | Returns "pid" (though it's not clear what, if anything, that | |
452 | means in the case of this target). */ | |
bd5635a1 | 453 | |
b543979c | 454 | static int |
bd5635a1 RP |
455 | remote_wait (status) |
456 | WAITTYPE *status; | |
457 | { | |
458 | unsigned char buf[PBUFSIZ]; | |
8f86a4e4 | 459 | |
bd5635a1 | 460 | WSETEXIT ((*status), 0); |
b543979c | 461 | |
4f8a48e5 | 462 | while (1) |
8f86a4e4 | 463 | { |
4f8a48e5 | 464 | unsigned char *p; |
a03d4f8e | 465 | |
4f8a48e5 ILT |
466 | ofunc = (void (*)()) signal (SIGINT, remote_interrupt); |
467 | getpkt ((char *) buf, 1); | |
468 | signal (SIGINT, ofunc); | |
4ecee2f9 | 469 | |
4f8a48e5 ILT |
470 | if (buf[0] == 'E') |
471 | warning ("Remote failure reply: %s", buf); | |
472 | else if (buf[0] == 'T') | |
8f86a4e4 | 473 | { |
4f8a48e5 ILT |
474 | int i; |
475 | long regno; | |
476 | char regs[MAX_REGISTER_RAW_SIZE]; | |
a03d4f8e | 477 | |
4f8a48e5 ILT |
478 | /* Expedited reply, containing Signal, {regno, reg} repeat */ |
479 | /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where | |
480 | ss = signal number | |
481 | n... = register number | |
482 | r... = register contents | |
483 | */ | |
5af4f5f6 | 484 | |
4f8a48e5 | 485 | p = &buf[3]; /* after Txx */ |
5af4f5f6 | 486 | |
4f8a48e5 ILT |
487 | while (*p) |
488 | { | |
489 | unsigned char *p1; | |
5af4f5f6 | 490 | |
4f8a48e5 | 491 | regno = strtol (p, &p1, 16); /* Read the register number */ |
5af4f5f6 | 492 | |
4f8a48e5 ILT |
493 | if (p1 == p) |
494 | warning ("Remote sent badly formed register number: %s\nPacket: '%s'\n", | |
495 | p1, buf); | |
4ecee2f9 | 496 | |
4f8a48e5 | 497 | p = p1; |
4ecee2f9 | 498 | |
4f8a48e5 ILT |
499 | if (*p++ != ':') |
500 | warning ("Malformed packet (missing colon): %s\nPacket: '%s'\n", | |
501 | p, buf); | |
a03d4f8e | 502 | |
4f8a48e5 ILT |
503 | if (regno >= NUM_REGS) |
504 | warning ("Remote sent bad register number %d: %s\nPacket: '%s'\n", | |
505 | regno, p, buf); | |
506 | ||
507 | for (i = 0; i < REGISTER_RAW_SIZE (regno); i++) | |
508 | { | |
509 | if (p[0] == 0 || p[1] == 0) | |
510 | warning ("Remote reply is too short: %s", buf); | |
511 | regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]); | |
512 | p += 2; | |
513 | } | |
514 | ||
515 | if (*p++ != ';') | |
516 | warning ("Remote register badly formatted: %s", buf); | |
517 | ||
518 | supply_register (regno, regs); | |
519 | } | |
520 | break; | |
8f86a4e4 | 521 | } |
4f8a48e5 | 522 | else if (buf[0] == 'N') |
758aeb93 | 523 | { |
4f8a48e5 ILT |
524 | unsigned char *p1; |
525 | bfd_vma text_addr, data_addr, bss_addr; | |
526 | ||
527 | /* Relocate object file. Format is NAATT;DD;BB where AA is | |
528 | the signal number, TT is the new text address, DD is the | |
529 | new data address, and BB is the new bss address. This is | |
530 | used by the NLM stub; gdb may see more sections. */ | |
531 | p = &buf[3]; | |
532 | text_addr = strtol (p, &p1, 16); | |
533 | if (p1 == p || *p1 != ';') | |
534 | warning ("Malformed relocation packet: Packet '%s'", buf); | |
535 | p = p1 + 1; | |
536 | data_addr = strtol (p, &p1, 16); | |
537 | if (p1 == p || *p1 != ';') | |
538 | warning ("Malformed relocation packet: Packet '%s'", buf); | |
539 | p = p1 + 1; | |
540 | bss_addr = strtol (p, &p1, 16); | |
541 | if (p1 == p) | |
542 | warning ("Malformed relocation packet: Packet '%s'", buf); | |
543 | ||
544 | if (symfile_objfile != NULL) | |
545 | { | |
546 | struct section_offsets *offs; | |
547 | ||
548 | /* FIXME: Why don't the various symfile_offsets routines | |
549 | in the sym_fns vectors set this? */ | |
550 | if (symfile_objfile->num_sections == 0) | |
551 | symfile_objfile->num_sections = SECT_OFF_MAX; | |
552 | ||
553 | offs = ((struct section_offsets *) | |
554 | alloca (sizeof (struct section_offsets) | |
555 | + (symfile_objfile->num_sections | |
556 | * sizeof (offs->offsets)))); | |
557 | memcpy (offs, symfile_objfile->section_offsets, | |
558 | (sizeof (struct section_offsets) | |
559 | + (symfile_objfile->num_sections | |
560 | * sizeof (offs->offsets)))); | |
561 | ANOFFSET (offs, SECT_OFF_TEXT) = text_addr; | |
562 | ANOFFSET (offs, SECT_OFF_DATA) = data_addr; | |
563 | ANOFFSET (offs, SECT_OFF_BSS) = bss_addr; | |
564 | ||
565 | objfile_relocate (symfile_objfile, offs); | |
566 | } | |
567 | break; | |
758aeb93 | 568 | } |
4f8a48e5 ILT |
569 | else if (buf[0] == 'W') |
570 | { | |
571 | /* The remote process exited. */ | |
572 | WSETEXIT (*status, (fromhex (buf[1]) << 4) + fromhex (buf[2])); | |
573 | return 0; | |
574 | } | |
575 | else if (buf[0] == 'S') | |
576 | break; | |
577 | else | |
578 | warning ("Invalid remote reply: %s", buf); | |
758aeb93 | 579 | } |
8f86a4e4 | 580 | |
bd5635a1 | 581 | WSETSTOP ((*status), (((fromhex (buf[1])) << 4) + (fromhex (buf[2])))); |
8f86a4e4 | 582 | |
e1ce8aa5 | 583 | return 0; |
bd5635a1 RP |
584 | } |
585 | ||
55fea07b JK |
586 | /* Number of bytes of registers this stub implements. */ |
587 | static int register_bytes_found; | |
588 | ||
bd5635a1 | 589 | /* Read the remote registers into the block REGS. */ |
e1ce8aa5 JK |
590 | /* Currently we just read all the registers, so we don't use regno. */ |
591 | /* ARGSUSED */ | |
b543979c | 592 | static void |
bd5635a1 RP |
593 | remote_fetch_registers (regno) |
594 | int regno; | |
595 | { | |
596 | char buf[PBUFSIZ]; | |
597 | int i; | |
598 | char *p; | |
599 | char regs[REGISTER_BYTES]; | |
600 | ||
601 | sprintf (buf, "g"); | |
602 | remote_send (buf); | |
603 | ||
55fea07b JK |
604 | /* Unimplemented registers read as all bits zero. */ |
605 | memset (regs, 0, REGISTER_BYTES); | |
606 | ||
bd5635a1 RP |
607 | /* Reply describes registers byte by byte, each byte encoded as two |
608 | hex characters. Suck them all up, then supply them to the | |
609 | register cacheing/storage mechanism. */ | |
610 | ||
611 | p = buf; | |
612 | for (i = 0; i < REGISTER_BYTES; i++) | |
613 | { | |
55fea07b JK |
614 | if (p[0] == 0) |
615 | break; | |
616 | if (p[1] == 0) | |
617 | { | |
618 | warning ("Remote reply is of odd length: %s", buf); | |
619 | /* Don't change register_bytes_found in this case, and don't | |
620 | print a second warning. */ | |
621 | goto supply_them; | |
622 | } | |
bd5635a1 RP |
623 | regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]); |
624 | p += 2; | |
625 | } | |
55fea07b JK |
626 | |
627 | if (i != register_bytes_found) | |
628 | { | |
629 | register_bytes_found = i; | |
630 | #ifdef REGISTER_BYTES_OK | |
631 | if (!REGISTER_BYTES_OK (i)) | |
632 | warning ("Remote reply is too short: %s", buf); | |
633 | #endif | |
634 | } | |
635 | ||
636 | supply_them: | |
bd5635a1 RP |
637 | for (i = 0; i < NUM_REGS; i++) |
638 | supply_register (i, ®s[REGISTER_BYTE(i)]); | |
bd5635a1 RP |
639 | } |
640 | ||
641 | /* Prepare to store registers. Since we send them all, we have to | |
642 | read out the ones we don't want to change first. */ | |
643 | ||
b543979c | 644 | static void |
bd5635a1 RP |
645 | remote_prepare_to_store () |
646 | { | |
34517ebc JG |
647 | /* Make sure the entire registers array is valid. */ |
648 | read_register_bytes (0, (char *)NULL, REGISTER_BYTES); | |
bd5635a1 RP |
649 | } |
650 | ||
651 | /* Store the remote registers from the contents of the block REGISTERS. | |
652 | FIXME, eventually just store one register if that's all that is needed. */ | |
653 | ||
e1ce8aa5 | 654 | /* ARGSUSED */ |
b543979c | 655 | static void |
bd5635a1 RP |
656 | remote_store_registers (regno) |
657 | int regno; | |
658 | { | |
659 | char buf[PBUFSIZ]; | |
660 | int i; | |
661 | char *p; | |
662 | ||
663 | buf[0] = 'G'; | |
664 | ||
665 | /* Command describes registers byte by byte, | |
666 | each byte encoded as two hex characters. */ | |
667 | ||
668 | p = buf + 1; | |
55fea07b JK |
669 | /* remote_prepare_to_store insures that register_bytes_found gets set. */ |
670 | for (i = 0; i < register_bytes_found; i++) | |
bd5635a1 RP |
671 | { |
672 | *p++ = tohex ((registers[i] >> 4) & 0xf); | |
673 | *p++ = tohex (registers[i] & 0xf); | |
674 | } | |
675 | *p = '\0'; | |
676 | ||
677 | remote_send (buf); | |
bd5635a1 RP |
678 | } |
679 | ||
b43e0347 JK |
680 | #if 0 |
681 | ||
682 | /* Use of the data cache is disabled because it loses for looking at | |
683 | and changing hardware I/O ports and the like. Accepting `volatile' | |
684 | would perhaps be one way to fix it, but a better way which would | |
685 | win for more cases would be to use the executable file for the text | |
686 | segment, like the `icache' code below but done cleanly (in some | |
687 | target-independent place, perhaps in target_xfer_memory, perhaps | |
688 | based on assigning each target a speed or perhaps by some simpler | |
689 | mechanism). */ | |
690 | ||
bd5635a1 RP |
691 | /* Read a word from remote address ADDR and return it. |
692 | This goes through the data cache. */ | |
693 | ||
b43e0347 | 694 | static int |
bd5635a1 RP |
695 | remote_fetch_word (addr) |
696 | CORE_ADDR addr; | |
697 | { | |
d538b510 | 698 | #if 0 |
bd5635a1 RP |
699 | if (icache) |
700 | { | |
701 | extern CORE_ADDR text_start, text_end; | |
702 | ||
703 | if (addr >= text_start && addr < text_end) | |
704 | { | |
705 | int buffer; | |
706 | xfer_core_file (addr, &buffer, sizeof (int)); | |
707 | return buffer; | |
708 | } | |
709 | } | |
d538b510 RP |
710 | #endif |
711 | return dcache_fetch (remote_dcache, addr); | |
bd5635a1 RP |
712 | } |
713 | ||
714 | /* Write a word WORD into remote address ADDR. | |
715 | This goes through the data cache. */ | |
716 | ||
b43e0347 | 717 | static void |
bd5635a1 RP |
718 | remote_store_word (addr, word) |
719 | CORE_ADDR addr; | |
720 | int word; | |
721 | { | |
d538b510 | 722 | dcache_poke (remote_dcache, addr, word); |
bd5635a1 | 723 | } |
b43e0347 | 724 | #endif /* 0 */ |
bd5635a1 RP |
725 | \f |
726 | /* Write memory data directly to the remote machine. | |
727 | This does not inform the data cache; the data cache uses this. | |
728 | MEMADDR is the address in the remote memory space. | |
729 | MYADDR is the address of the buffer in our space. | |
d538b510 | 730 | LEN is the number of bytes. |
bd5635a1 | 731 | |
d538b510 RP |
732 | Returns number of bytes transferred, or 0 for error. */ |
733 | ||
734 | static int | |
bd5635a1 RP |
735 | remote_write_bytes (memaddr, myaddr, len) |
736 | CORE_ADDR memaddr; | |
d538b510 | 737 | unsigned char *myaddr; |
bd5635a1 RP |
738 | int len; |
739 | { | |
740 | char buf[PBUFSIZ]; | |
741 | int i; | |
742 | char *p; | |
743 | ||
744 | if (len > PBUFSIZ / 2 - 20) | |
745 | abort (); | |
746 | ||
747 | sprintf (buf, "M%x,%x:", memaddr, len); | |
748 | ||
b543979c | 749 | /* We send target system values byte by byte, in increasing byte addresses, |
bd5635a1 RP |
750 | each byte encoded as two hex characters. */ |
751 | ||
752 | p = buf + strlen (buf); | |
753 | for (i = 0; i < len; i++) | |
754 | { | |
755 | *p++ = tohex ((myaddr[i] >> 4) & 0xf); | |
756 | *p++ = tohex (myaddr[i] & 0xf); | |
757 | } | |
758 | *p = '\0'; | |
759 | ||
d538b510 RP |
760 | putpkt (buf); |
761 | getpkt (buf, 0); | |
762 | ||
763 | if (buf[0] == 'E') | |
764 | { | |
765 | /* There is no correspondance between what the remote protocol uses | |
766 | for errors and errno codes. We would like a cleaner way of | |
767 | representing errors (big enough to include errno codes, bfd_error | |
768 | codes, and others). But for now just return EIO. */ | |
769 | errno = EIO; | |
770 | return 0; | |
771 | } | |
772 | return len; | |
bd5635a1 RP |
773 | } |
774 | ||
775 | /* Read memory data directly from the remote machine. | |
776 | This does not use the data cache; the data cache uses this. | |
777 | MEMADDR is the address in the remote memory space. | |
778 | MYADDR is the address of the buffer in our space. | |
d538b510 | 779 | LEN is the number of bytes. |
bd5635a1 | 780 | |
d538b510 RP |
781 | Returns number of bytes transferred, or 0 for error. */ |
782 | ||
783 | static int | |
bd5635a1 RP |
784 | remote_read_bytes (memaddr, myaddr, len) |
785 | CORE_ADDR memaddr; | |
d538b510 | 786 | unsigned char *myaddr; |
bd5635a1 RP |
787 | int len; |
788 | { | |
789 | char buf[PBUFSIZ]; | |
790 | int i; | |
791 | char *p; | |
792 | ||
793 | if (len > PBUFSIZ / 2 - 1) | |
794 | abort (); | |
795 | ||
796 | sprintf (buf, "m%x,%x", memaddr, len); | |
d538b510 RP |
797 | putpkt (buf); |
798 | getpkt (buf, 0); | |
799 | ||
800 | if (buf[0] == 'E') | |
801 | { | |
802 | /* There is no correspondance between what the remote protocol uses | |
803 | for errors and errno codes. We would like a cleaner way of | |
804 | representing errors (big enough to include errno codes, bfd_error | |
805 | codes, and others). But for now just return EIO. */ | |
806 | errno = EIO; | |
807 | return 0; | |
808 | } | |
bd5635a1 | 809 | |
b543979c | 810 | /* Reply describes memory byte by byte, |
bd5635a1 RP |
811 | each byte encoded as two hex characters. */ |
812 | ||
813 | p = buf; | |
814 | for (i = 0; i < len; i++) | |
815 | { | |
816 | if (p[0] == 0 || p[1] == 0) | |
d538b510 RP |
817 | /* Reply is short. This means that we were able to read only part |
818 | of what we wanted to. */ | |
819 | break; | |
bd5635a1 RP |
820 | myaddr[i] = fromhex (p[0]) * 16 + fromhex (p[1]); |
821 | p += 2; | |
822 | } | |
d538b510 | 823 | return i; |
bd5635a1 RP |
824 | } |
825 | \f | |
826 | /* Read or write LEN bytes from inferior memory at MEMADDR, transferring | |
e1ce8aa5 | 827 | to or from debugger address MYADDR. Write to inferior if SHOULD_WRITE is |
bd5635a1 RP |
828 | nonzero. Returns length of data written or read; 0 for error. */ |
829 | ||
b543979c JG |
830 | /* ARGSUSED */ |
831 | static int | |
832 | remote_xfer_memory(memaddr, myaddr, len, should_write, target) | |
bd5635a1 RP |
833 | CORE_ADDR memaddr; |
834 | char *myaddr; | |
835 | int len; | |
e1ce8aa5 | 836 | int should_write; |
b543979c | 837 | struct target_ops *target; /* ignored */ |
bd5635a1 | 838 | { |
bd5635a1 | 839 | int xfersize; |
d538b510 RP |
840 | int bytes_xferred; |
841 | int total_xferred = 0; | |
842 | ||
bd5635a1 RP |
843 | while (len > 0) |
844 | { | |
845 | if (len > MAXBUFBYTES) | |
846 | xfersize = MAXBUFBYTES; | |
847 | else | |
848 | xfersize = len; | |
849 | ||
e1ce8aa5 | 850 | if (should_write) |
d538b510 | 851 | bytes_xferred = remote_write_bytes (memaddr, myaddr, xfersize); |
bd5635a1 | 852 | else |
d538b510 RP |
853 | bytes_xferred = remote_read_bytes (memaddr, myaddr, xfersize); |
854 | ||
855 | /* If we get an error, we are done xferring. */ | |
856 | if (bytes_xferred == 0) | |
857 | break; | |
858 | ||
859 | memaddr += bytes_xferred; | |
860 | myaddr += bytes_xferred; | |
861 | len -= bytes_xferred; | |
862 | total_xferred += bytes_xferred; | |
bd5635a1 | 863 | } |
d538b510 | 864 | return total_xferred; |
bd5635a1 RP |
865 | } |
866 | ||
b543979c | 867 | static void |
8f86a4e4 | 868 | remote_files_info (ignore) |
5af4f5f6 | 869 | struct target_ops *ignore; |
bd5635a1 | 870 | { |
7c622b41 | 871 | puts_filtered ("Debugging a target over a serial line.\n"); |
bd5635a1 RP |
872 | } |
873 | \f | |
e50ebec8 JK |
874 | /* Stuff for dealing with the packets which are part of this protocol. |
875 | See comment at top of file for details. */ | |
bd5635a1 | 876 | |
ebdb9ade | 877 | /* Read a single character from the remote end, masking it down to 7 bits. */ |
b543979c | 878 | |
bd5635a1 RP |
879 | static int |
880 | readchar () | |
881 | { | |
ebdb9ade | 882 | int ch; |
bd5635a1 | 883 | |
ebdb9ade | 884 | ch = SERIAL_READCHAR (remote_desc, timeout); |
fce7f2d9 | 885 | |
ebdb9ade JK |
886 | if (ch < 0) |
887 | return ch; | |
bd5635a1 | 888 | |
ebdb9ade | 889 | return ch & 0x7f; |
bd5635a1 RP |
890 | } |
891 | ||
892 | /* Send the command in BUF to the remote machine, | |
893 | and read the reply into BUF. | |
894 | Report an error if we get an error reply. */ | |
895 | ||
896 | static void | |
897 | remote_send (buf) | |
898 | char *buf; | |
899 | { | |
900 | ||
901 | putpkt (buf); | |
7c622b41 | 902 | getpkt (buf, 0); |
bd5635a1 RP |
903 | |
904 | if (buf[0] == 'E') | |
905 | error ("Remote failure reply: %s", buf); | |
906 | } | |
907 | ||
908 | /* Send a packet to the remote machine, with error checking. | |
909 | The data of the packet is in BUF. */ | |
910 | ||
911 | static void | |
912 | putpkt (buf) | |
913 | char *buf; | |
914 | { | |
915 | int i; | |
916 | unsigned char csum = 0; | |
b543979c | 917 | char buf2[PBUFSIZ]; |
bd5635a1 | 918 | int cnt = strlen (buf); |
ebdb9ade | 919 | int ch; |
bd5635a1 RP |
920 | char *p; |
921 | ||
922 | /* Copy the packet into buffer BUF2, encapsulating it | |
923 | and giving it a checksum. */ | |
924 | ||
b543979c JG |
925 | if (cnt > sizeof(buf2) - 5) /* Prosanity check */ |
926 | abort(); | |
927 | ||
bd5635a1 RP |
928 | p = buf2; |
929 | *p++ = '$'; | |
930 | ||
931 | for (i = 0; i < cnt; i++) | |
932 | { | |
933 | csum += buf[i]; | |
934 | *p++ = buf[i]; | |
935 | } | |
936 | *p++ = '#'; | |
937 | *p++ = tohex ((csum >> 4) & 0xf); | |
938 | *p++ = tohex (csum & 0xf); | |
939 | ||
940 | /* Send it over and over until we get a positive ack. */ | |
941 | ||
6b27ebe8 JK |
942 | while (1) |
943 | { | |
d538b510 | 944 | if (remote_debug) |
6b27ebe8 JK |
945 | { |
946 | *p = '\0'; | |
947 | printf ("Sending packet: %s...", buf2); fflush(stdout); | |
948 | } | |
949 | if (SERIAL_WRITE (remote_desc, buf2, p - buf2)) | |
950 | perror_with_name ("putpkt: write failed"); | |
951 | ||
952 | /* read until either a timeout occurs (-2) or '+' is read */ | |
953 | while (1) | |
954 | { | |
955 | ch = readchar (); | |
956 | ||
957 | switch (ch) | |
958 | { | |
959 | case '+': | |
d538b510 | 960 | if (remote_debug) |
6b27ebe8 JK |
961 | printf("Ack\n"); |
962 | return; | |
963 | case SERIAL_TIMEOUT: | |
964 | break; /* Retransmit buffer */ | |
965 | case SERIAL_ERROR: | |
966 | perror_with_name ("putpkt: couldn't read ACK"); | |
967 | case SERIAL_EOF: | |
968 | error ("putpkt: EOF while trying to read ACK"); | |
969 | default: | |
d538b510 | 970 | if (remote_debug) |
6b27ebe8 JK |
971 | printf ("%02X %c ", ch&0xFF, ch); |
972 | continue; | |
973 | } | |
974 | break; /* Here to retransmit */ | |
975 | } | |
976 | } | |
bd5635a1 RP |
977 | } |
978 | ||
979 | /* Read a packet from the remote machine, with error checking, | |
7c622b41 JG |
980 | and store it in BUF. BUF is expected to be of size PBUFSIZ. |
981 | If FOREVER, wait forever rather than timing out; this is used | |
982 | while the target is executing user code. */ | |
bd5635a1 RP |
983 | |
984 | static void | |
7c622b41 | 985 | getpkt (buf, forever) |
bd5635a1 | 986 | char *buf; |
ebdb9ade | 987 | int forever; |
bd5635a1 RP |
988 | { |
989 | char *bp; | |
990 | unsigned char csum; | |
7c622b41 | 991 | int c = 0; |
bd5635a1 | 992 | unsigned char c1, c2; |
38094c60 JG |
993 | int retries = 0; |
994 | #define MAX_RETRIES 10 | |
bd5635a1 | 995 | |
bd5635a1 RP |
996 | while (1) |
997 | { | |
7c622b41 JG |
998 | /* This can loop forever if the remote side sends us characters |
999 | continuously, but if it pauses, we'll get a zero from readchar | |
1000 | because of timeout. Then we'll count that as a retry. */ | |
6b27ebe8 JK |
1001 | |
1002 | c = readchar(); | |
1003 | if (c > 0 && c != '$') | |
1004 | continue; | |
1005 | ||
1006 | if (c == SERIAL_TIMEOUT) | |
1007 | { | |
1008 | if (forever) | |
1009 | continue; | |
1010 | if (++retries >= MAX_RETRIES) | |
d538b510 | 1011 | if (remote_debug) puts_filtered ("Timed out.\n"); |
6b27ebe8 JK |
1012 | goto out; |
1013 | } | |
1014 | ||
1015 | if (c == SERIAL_EOF) | |
1016 | error ("Remote connection closed"); | |
1017 | if (c == SERIAL_ERROR) | |
1018 | perror_with_name ("Remote communication error"); | |
7c622b41 | 1019 | |
bd5635a1 RP |
1020 | /* Force csum to be zero here because of possible error retry. */ |
1021 | csum = 0; | |
bd5635a1 | 1022 | bp = buf; |
7c622b41 | 1023 | |
bd5635a1 RP |
1024 | while (1) |
1025 | { | |
1026 | c = readchar (); | |
ebdb9ade | 1027 | if (c == SERIAL_TIMEOUT) |
7c622b41 | 1028 | { |
d538b510 | 1029 | if (remote_debug) |
7c622b41 JG |
1030 | puts_filtered ("Timeout in mid-packet, retrying\n"); |
1031 | goto whole; /* Start a new packet, count retries */ | |
1032 | } | |
1033 | if (c == '$') | |
1034 | { | |
d538b510 | 1035 | if (remote_debug) |
7c622b41 JG |
1036 | puts_filtered ("Saw new packet start in middle of old one\n"); |
1037 | goto whole; /* Start a new packet, count retries */ | |
1038 | } | |
bd5635a1 RP |
1039 | if (c == '#') |
1040 | break; | |
8f86a4e4 JG |
1041 | if (bp >= buf+PBUFSIZ-1) |
1042 | { | |
1043 | *bp = '\0'; | |
7c622b41 JG |
1044 | puts_filtered ("Remote packet too long: "); |
1045 | puts_filtered (buf); | |
1046 | puts_filtered ("\n"); | |
8f86a4e4 JG |
1047 | goto whole; |
1048 | } | |
bd5635a1 RP |
1049 | *bp++ = c; |
1050 | csum += c; | |
1051 | } | |
1052 | *bp = 0; | |
1053 | ||
1054 | c1 = fromhex (readchar ()); | |
1055 | c2 = fromhex (readchar ()); | |
1056 | if ((csum & 0xff) == (c1 << 4) + c2) | |
1057 | break; | |
7c622b41 JG |
1058 | printf_filtered ("Bad checksum, sentsum=0x%x, csum=0x%x, buf=", |
1059 | (c1 << 4) + c2, csum & 0xff); | |
1060 | puts_filtered (buf); | |
1061 | puts_filtered ("\n"); | |
38094c60 | 1062 | |
8f86a4e4 JG |
1063 | /* Try the whole thing again. */ |
1064 | whole: | |
38094c60 JG |
1065 | if (++retries < MAX_RETRIES) |
1066 | { | |
ebdb9ade | 1067 | SERIAL_WRITE (remote_desc, "-", 1); |
38094c60 JG |
1068 | } |
1069 | else | |
1070 | { | |
1071 | printf ("Ignoring packet error, continuing...\n"); | |
1072 | break; | |
1073 | } | |
bd5635a1 RP |
1074 | } |
1075 | ||
7c622b41 JG |
1076 | out: |
1077 | ||
ebdb9ade | 1078 | SERIAL_WRITE (remote_desc, "+", 1); |
bd5635a1 | 1079 | |
d538b510 | 1080 | if (remote_debug) |
8f86a4e4 | 1081 | fprintf (stderr,"Packet received: %s\n", buf); |
bd5635a1 RP |
1082 | } |
1083 | \f | |
ebdb9ade JK |
1084 | static void |
1085 | remote_kill () | |
1086 | { | |
1087 | putpkt ("k"); | |
1088 | /* Don't wait for it to die. I'm not really sure it matters whether | |
1089 | we do or not. For the existing stubs, kill is a noop. */ | |
1090 | target_mourn_inferior (); | |
1091 | } | |
bd5635a1 | 1092 | |
ebdb9ade JK |
1093 | static void |
1094 | remote_mourn () | |
1095 | { | |
1096 | unpush_target (&remote_ops); | |
1097 | generic_mourn_inferior (); | |
1098 | } | |
1099 | \f | |
5af4f5f6 JK |
1100 | #ifdef REMOTE_BREAKPOINT |
1101 | ||
1102 | /* On some machines, e.g. 68k, we may use a different breakpoint instruction | |
1103 | than other targets. */ | |
1104 | static unsigned char break_insn[] = REMOTE_BREAKPOINT; | |
1105 | ||
1106 | /* Check that it fits in BREAKPOINT_MAX bytes. */ | |
1107 | static unsigned char check_break_insn_size[BREAKPOINT_MAX] = REMOTE_BREAKPOINT; | |
1108 | ||
1109 | #else /* No REMOTE_BREAKPOINT. */ | |
1110 | ||
1111 | /* Same old breakpoint instruction. This code does nothing different | |
1112 | than mem-break.c. */ | |
1113 | static unsigned char break_insn[] = BREAKPOINT; | |
1114 | ||
1115 | #endif /* No REMOTE_BREAKPOINT. */ | |
1116 | ||
1117 | /* Insert a breakpoint on targets that don't have any better breakpoint | |
1118 | support. We read the contents of the target location and stash it, | |
1119 | then overwrite it with a breakpoint instruction. ADDR is the target | |
1120 | location in the target machine. CONTENTS_CACHE is a pointer to | |
1121 | memory allocated for saving the target contents. It is guaranteed | |
1122 | by the caller to be long enough to save sizeof BREAKPOINT bytes (this | |
1123 | is accomplished via BREAKPOINT_MAX). */ | |
1124 | ||
d538b510 | 1125 | static int |
5af4f5f6 JK |
1126 | remote_insert_breakpoint (addr, contents_cache) |
1127 | CORE_ADDR addr; | |
1128 | char *contents_cache; | |
1129 | { | |
1130 | int val; | |
1131 | ||
1132 | val = target_read_memory (addr, contents_cache, sizeof break_insn); | |
1133 | ||
1134 | if (val == 0) | |
1135 | val = target_write_memory (addr, (char *)break_insn, sizeof break_insn); | |
1136 | ||
1137 | return val; | |
1138 | } | |
1139 | ||
d538b510 | 1140 | static int |
5af4f5f6 JK |
1141 | remote_remove_breakpoint (addr, contents_cache) |
1142 | CORE_ADDR addr; | |
1143 | char *contents_cache; | |
1144 | { | |
1145 | return target_write_memory (addr, contents_cache, sizeof break_insn); | |
1146 | } | |
1147 | \f | |
bd5635a1 RP |
1148 | /* Define the target subroutine names */ |
1149 | ||
1150 | struct target_ops remote_ops = { | |
b543979c JG |
1151 | "remote", /* to_shortname */ |
1152 | "Remote serial target in gdb-specific protocol", /* to_longname */ | |
1153 | "Use a remote computer via a serial line, using a gdb-specific protocol.\n\ | |
1154 | Specify the serial device it is connected to (e.g. /dev/ttya).", /* to_doc */ | |
1155 | remote_open, /* to_open */ | |
1156 | remote_close, /* to_close */ | |
1157 | NULL, /* to_attach */ | |
1158 | remote_detach, /* to_detach */ | |
1159 | remote_resume, /* to_resume */ | |
1160 | remote_wait, /* to_wait */ | |
1161 | remote_fetch_registers, /* to_fetch_registers */ | |
1162 | remote_store_registers, /* to_store_registers */ | |
1163 | remote_prepare_to_store, /* to_prepare_to_store */ | |
b543979c JG |
1164 | remote_xfer_memory, /* to_xfer_memory */ |
1165 | remote_files_info, /* to_files_info */ | |
5af4f5f6 JK |
1166 | |
1167 | remote_insert_breakpoint, /* to_insert_breakpoint */ | |
1168 | remote_remove_breakpoint, /* to_remove_breakpoint */ | |
1169 | ||
b543979c JG |
1170 | NULL, /* to_terminal_init */ |
1171 | NULL, /* to_terminal_inferior */ | |
1172 | NULL, /* to_terminal_ours_for_output */ | |
1173 | NULL, /* to_terminal_ours */ | |
1174 | NULL, /* to_terminal_info */ | |
ebdb9ade | 1175 | remote_kill, /* to_kill */ |
6b27ebe8 | 1176 | generic_load, /* to_load */ |
b543979c JG |
1177 | NULL, /* to_lookup_symbol */ |
1178 | NULL, /* to_create_inferior */ | |
ebdb9ade | 1179 | remote_mourn, /* to_mourn_inferior */ |
34517ebc | 1180 | 0, /* to_can_run */ |
7c622b41 | 1181 | 0, /* to_notice_signals */ |
b543979c JG |
1182 | process_stratum, /* to_stratum */ |
1183 | NULL, /* to_next */ | |
1184 | 1, /* to_has_all_memory */ | |
1185 | 1, /* to_has_memory */ | |
1186 | 1, /* to_has_stack */ | |
1187 | 1, /* to_has_registers */ | |
1188 | 1, /* to_has_execution */ | |
1189 | NULL, /* sections */ | |
1190 | NULL, /* sections_end */ | |
1191 | OPS_MAGIC /* to_magic */ | |
bd5635a1 RP |
1192 | }; |
1193 | ||
1194 | void | |
1195 | _initialize_remote () | |
1196 | { | |
1197 | add_target (&remote_ops); | |
1198 | } | |
8f86a4e4 | 1199 | #endif |