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33742334 ILT |
1 | /* Remote debugging interface for MIPS remote debugging protocol. |
2 | Copyright 1993 Free Software Foundation, Inc. | |
3 | Contributed by Cygnus Support. Written by Ian Lance Taylor | |
4 | <ian@cygnus.com>. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "inferior.h" | |
24 | #include "bfd.h" | |
25 | #include "wait.h" | |
26 | #include "gdbcmd.h" | |
27 | #include "gdbcore.h" | |
28 | #include "serial.h" | |
29 | #include "target.h" | |
30 | ||
31 | #include <signal.h> | |
32 | \f | |
33 | /* Prototypes for local functions. */ | |
34 | ||
35 | static int | |
36 | mips_readchar PARAMS ((int timeout)); | |
37 | ||
38 | static int | |
39 | mips_receive_header PARAMS ((unsigned char *hdr, int *pgarbage, int ch, | |
40 | int timeout)); | |
41 | ||
42 | static int | |
43 | mips_receive_trailer PARAMS ((unsigned char *trlr, int *pgarbage, int *pch, | |
44 | int timeout)); | |
45 | ||
46 | static int mips_cksum PARAMS ((const unsigned char *hdr, | |
47 | const unsigned char *data, | |
48 | int len)); | |
49 | ||
50 | static void | |
51 | mips_send_packet PARAMS ((const char *s)); | |
52 | ||
53 | static int | |
54 | mips_receive_packet PARAMS ((char *buff)); | |
55 | ||
56 | static int | |
57 | mips_request PARAMS ((char cmd, unsigned int addr, unsigned int data, | |
58 | int *perr)); | |
59 | ||
60 | static void | |
61 | mips_open PARAMS ((char *name, int from_tty)); | |
62 | ||
63 | static void | |
64 | mips_close PARAMS ((int quitting)); | |
65 | ||
66 | static void | |
67 | mips_detach PARAMS ((char *args, int from_tty)); | |
68 | ||
69 | static void | |
70 | mips_resume PARAMS ((int step, int siggnal)); | |
71 | ||
72 | static int | |
73 | mips_wait PARAMS ((WAITTYPE *status)); | |
74 | ||
75 | static int | |
76 | mips_map_regno PARAMS ((int regno)); | |
77 | ||
78 | static void | |
79 | mips_fetch_registers PARAMS ((int regno)); | |
80 | ||
81 | static void | |
82 | mips_prepare_to_store PARAMS ((void)); | |
83 | ||
84 | static void | |
85 | mips_store_registers PARAMS ((int regno)); | |
86 | ||
87 | static int | |
88 | mips_fetch_word PARAMS ((CORE_ADDR addr)); | |
89 | ||
90 | static void | |
91 | mips_store_word PARAMS ((CORE_ADDR addr, int value)); | |
92 | ||
93 | static int | |
94 | mips_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, int len, | |
95 | int write, struct target_ops *ignore)); | |
96 | ||
97 | static void | |
98 | mips_files_info PARAMS ((struct target_ops *ignore)); | |
99 | ||
100 | static void | |
101 | mips_load PARAMS ((char *args, int from_tty)); | |
102 | ||
103 | static void | |
104 | mips_create_inferior PARAMS ((char *execfile, char *args, char **env)); | |
105 | ||
106 | static void | |
107 | mips_mourn_inferior PARAMS ((void)); | |
108 | ||
109 | /* A forward declaration. */ | |
110 | extern struct target_ops mips_ops; | |
111 | \f | |
112 | /* The MIPS remote debugging interface is built on top of a simple | |
113 | packet protocol. Each packet is organized as follows: | |
114 | ||
115 | SYN The first character is always a SYN (ASCII 026, or ^V). SYN | |
116 | may not appear anywhere else in the packet. Any time a SYN is | |
117 | seen, a new packet should be assumed to have begun. | |
118 | ||
119 | TYPE_LEN | |
120 | This byte contains the upper five bits of the logical length | |
121 | of the data section, plus a single bit indicating whether this | |
122 | is a data packet or an acknowledgement. The documentation | |
123 | indicates that this bit is 1 for a data packet, but the actual | |
124 | board uses 1 for an acknowledgement. The value of the byte is | |
125 | 0x40 + (ack ? 0x20 : 0) + (len >> 6) | |
126 | (we always have 0 <= len < 1024). Acknowledgement packets do | |
127 | not carry data, and must have a data length of 0. | |
128 | ||
129 | LEN1 This byte contains the lower six bits of the logical length of | |
130 | the data section. The value is | |
131 | 0x40 + (len & 0x3f) | |
132 | ||
133 | SEQ This byte contains the six bit sequence number of the packet. | |
134 | The value is | |
135 | 0x40 + seq | |
136 | An acknowlegment packet contains the sequence number of the | |
137 | packet being acknowledged plus 1 module 64. Data packets are | |
138 | transmitted in sequence. There may only be one outstanding | |
139 | unacknowledged data packet at a time. The sequence numbers | |
140 | are independent in each direction. If an acknowledgement for | |
141 | the previous packet is received (i.e., an acknowledgement with | |
142 | the sequence number of the packet just sent) the packet just | |
143 | sent should be retransmitted. If no acknowledgement is | |
144 | received within a timeout period, the packet should be | |
145 | retransmitted. This has an unfortunate failure condition on a | |
146 | high-latency line, as a delayed acknowledgement may lead to an | |
147 | endless series of duplicate packets. | |
148 | ||
149 | DATA The actual data bytes follow. The following characters are | |
150 | escaped inline with DLE (ASCII 020, or ^P): | |
151 | SYN (026) DLE S | |
152 | DLE (020) DLE D | |
153 | ^C (003) DLE C | |
154 | ^S (023) DLE s | |
155 | ^Q (021) DLE q | |
156 | The additional DLE characters are not counted in the logical | |
157 | length stored in the TYPE_LEN and LEN1 bytes. | |
158 | ||
159 | CSUM1 | |
160 | CSUM2 | |
161 | CSUM3 | |
162 | These bytes contain an 18 bit checksum of the complete | |
163 | contents of the packet excluding the SEQ byte and the | |
164 | CSUM[123] bytes. The checksum is simply the twos complement | |
165 | addition of all the bytes treated as unsigned characters. The | |
166 | values of the checksum bytes are: | |
167 | CSUM1: 0x40 + ((cksum >> 12) & 0x3f) | |
168 | CSUM2: 0x40 + ((cksum >> 6) & 0x3f) | |
169 | CSUM3: 0x40 + (cksum & 0x3f) | |
170 | ||
171 | It happens that the MIPS remote debugging protocol always | |
172 | communicates with ASCII strings. Because of this, this | |
173 | implementation doesn't bother to handle the DLE quoting mechanism, | |
174 | since it will never be required. */ | |
175 | ||
176 | /* The SYN character which starts each packet. */ | |
177 | #define SYN '\026' | |
178 | ||
179 | /* The 0x40 used to offset each packet (this value ensures that all of | |
180 | the header and trailer bytes, other than SYN, are printable ASCII | |
181 | characters). */ | |
182 | #define HDR_OFFSET 0x40 | |
183 | ||
184 | /* The indices of the bytes in the packet header. */ | |
185 | #define HDR_INDX_SYN 0 | |
186 | #define HDR_INDX_TYPE_LEN 1 | |
187 | #define HDR_INDX_LEN1 2 | |
188 | #define HDR_INDX_SEQ 3 | |
189 | #define HDR_LENGTH 4 | |
190 | ||
191 | /* The data/ack bit in the TYPE_LEN header byte. */ | |
192 | #define TYPE_LEN_DA_BIT 0x20 | |
193 | #define TYPE_LEN_DATA 0 | |
194 | #define TYPE_LEN_ACK TYPE_LEN_DA_BIT | |
195 | ||
196 | /* How to compute the header bytes. */ | |
197 | #define HDR_SET_SYN(data, len, seq) (SYN) | |
198 | #define HDR_SET_TYPE_LEN(data, len, seq) \ | |
199 | (HDR_OFFSET \ | |
200 | + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \ | |
201 | + (((len) >> 6) & 0x1f)) | |
202 | #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f)) | |
203 | #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq)) | |
204 | ||
205 | /* Check that a header byte is reasonable. */ | |
206 | #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET) | |
207 | ||
208 | /* Get data from the header. These macros evaluate their argument | |
209 | multiple times. */ | |
210 | #define HDR_IS_DATA(hdr) \ | |
211 | (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA) | |
212 | #define HDR_GET_LEN(hdr) \ | |
213 | ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f))) | |
214 | #define HDR_GET_SEQ(hdr) ((hdr)[HDR_INDX_SEQ] & 0x3f) | |
215 | ||
216 | /* The maximum data length. */ | |
217 | #define DATA_MAXLEN 1023 | |
218 | ||
219 | /* The trailer offset. */ | |
220 | #define TRLR_OFFSET HDR_OFFSET | |
221 | ||
222 | /* The indices of the bytes in the packet trailer. */ | |
223 | #define TRLR_INDX_CSUM1 0 | |
224 | #define TRLR_INDX_CSUM2 1 | |
225 | #define TRLR_INDX_CSUM3 2 | |
226 | #define TRLR_LENGTH 3 | |
227 | ||
228 | /* How to compute the trailer bytes. */ | |
229 | #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f)) | |
230 | #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f)) | |
231 | #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f)) | |
232 | ||
233 | /* Check that a trailer byte is reasonable. */ | |
234 | #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET) | |
235 | ||
236 | /* Get data from the trailer. This evaluates its argument multiple | |
237 | times. */ | |
238 | #define TRLR_GET_CKSUM(trlr) \ | |
239 | ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \ | |
240 | + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \ | |
241 | + ((trlr)[TRLR_INDX_CSUM3] & 0x3f)) | |
242 | ||
243 | /* The sequence number modulos. */ | |
244 | #define SEQ_MODULOS (64) | |
245 | ||
246 | /* Set to 1 if the target is open. */ | |
247 | static int mips_is_open; | |
248 | ||
249 | /* The next sequence number to send. */ | |
250 | static int mips_send_seq; | |
251 | ||
252 | /* The next sequence number we expect to receive. */ | |
253 | static int mips_receive_seq; | |
254 | ||
255 | /* The time to wait before retransmitting a packet, in seconds. */ | |
256 | static int mips_retransmit_wait = 3; | |
257 | ||
258 | /* The number of times to try retransmitting a packet before giving up. */ | |
259 | static int mips_send_retries = 10; | |
260 | ||
261 | /* The number of garbage characters to accept when looking for an | |
262 | SYN for the next packet. */ | |
263 | static int mips_syn_garbage = 1050; | |
264 | ||
265 | /* The time to wait for a packet, in seconds. */ | |
266 | static int mips_receive_wait = 30; | |
267 | ||
268 | /* Set if we have sent a packet to the board but have not yet received | |
269 | a reply. */ | |
270 | static int mips_need_reply = 0; | |
271 | ||
272 | /* This can be set to get debugging with ``set remotedebug''. */ | |
273 | static int mips_debug = 0; | |
274 | ||
275 | /* Read a character from the remote, aborting on error. Returns -2 on | |
276 | timeout (since that's what serial_readchar returns). */ | |
277 | ||
278 | static int | |
279 | mips_readchar (timeout) | |
280 | int timeout; | |
281 | { | |
282 | int ch; | |
283 | ||
284 | ch = serial_readchar (timeout); | |
285 | if (ch == EOF) | |
286 | error ("End of file from remote"); | |
287 | if (ch == -3) | |
288 | error ("Error reading from remote: %s", safe_strerror (errno)); | |
289 | if (mips_debug > 1) | |
290 | { | |
291 | if (ch != -2) | |
292 | printf_filtered ("Read '%c' %d 0x%x\n", ch, ch, ch); | |
293 | else | |
294 | printf_filtered ("Timed out in read\n"); | |
295 | } | |
296 | return ch; | |
297 | } | |
298 | ||
299 | /* Get a packet header, putting the data in the supplied buffer. | |
300 | PGARBAGE is a pointer to the number of garbage characters received | |
301 | so far. CH is the last character received. Returns 0 for success, | |
302 | or -1 for timeout. */ | |
303 | ||
304 | static int | |
305 | mips_receive_header (hdr, pgarbage, ch, timeout) | |
306 | unsigned char *hdr; | |
307 | int *pgarbage; | |
308 | int ch; | |
309 | int timeout; | |
310 | { | |
311 | int i; | |
312 | ||
313 | while (1) | |
314 | { | |
315 | /* Wait for a SYN. mips_syn_garbage is intended to prevent | |
316 | sitting here indefinitely if the board sends us one garbage | |
317 | character per second. ch may already have a value from the | |
318 | last time through the loop. */ | |
319 | while (ch != SYN) | |
320 | { | |
321 | ch = mips_readchar (timeout); | |
322 | if (ch == -2) | |
323 | return -1; | |
324 | if (ch != SYN) | |
325 | { | |
326 | /* Printing the character here lets the user of gdb see | |
327 | what the program is outputting, if the debugging is | |
328 | being done on the console port. FIXME: Perhaps this | |
329 | should be filtered? */ | |
330 | putchar (ch); | |
331 | ||
332 | ++*pgarbage; | |
333 | if (*pgarbage > mips_syn_garbage) | |
334 | error ("Remote debugging protocol failure"); | |
335 | } | |
336 | } | |
337 | ||
338 | /* Get the packet header following the SYN. */ | |
339 | for (i = 1; i < HDR_LENGTH; i++) | |
340 | { | |
341 | ch = mips_readchar (timeout); | |
342 | if (ch == -2) | |
343 | return -1; | |
344 | ||
345 | /* Make sure this is a header byte. */ | |
346 | if (ch == SYN || ! HDR_CHECK (ch)) | |
347 | break; | |
348 | ||
349 | hdr[i] = ch; | |
350 | } | |
351 | ||
352 | /* If we got the complete header, we can return. Otherwise we | |
353 | loop around and keep looking for SYN. */ | |
354 | if (i >= HDR_LENGTH) | |
355 | return 0; | |
356 | } | |
357 | } | |
358 | ||
359 | /* Get a packet header, putting the data in the supplied buffer. | |
360 | PGARBAGE is a pointer to the number of garbage characters received | |
361 | so far. The last character read is returned in *PCH. Returns 0 | |
362 | for success, -1 for timeout, -2 for error. */ | |
363 | ||
364 | static int | |
365 | mips_receive_trailer (trlr, pgarbage, pch, timeout) | |
366 | unsigned char *trlr; | |
367 | int *pgarbage; | |
368 | int *pch; | |
369 | int timeout; | |
370 | { | |
371 | int i; | |
372 | int ch; | |
373 | ||
374 | for (i = 0; i < TRLR_LENGTH; i++) | |
375 | { | |
376 | ch = mips_readchar (timeout); | |
377 | *pch = ch; | |
378 | if (ch == -2) | |
379 | return -1; | |
380 | if (! TRLR_CHECK (ch)) | |
381 | return -2; | |
382 | trlr[i] = ch; | |
383 | } | |
384 | return 0; | |
385 | } | |
386 | ||
387 | /* Get the checksum of a packet. HDR points to the packet header. | |
388 | DATA points to the packet data. LEN is the length of DATA. */ | |
389 | ||
390 | static int | |
391 | mips_cksum (hdr, data, len) | |
392 | const unsigned char *hdr; | |
393 | const unsigned char *data; | |
394 | int len; | |
395 | { | |
396 | register const unsigned char *p; | |
397 | register int c; | |
398 | register int cksum; | |
399 | ||
400 | cksum = 0; | |
401 | ||
402 | /* The initial SYN is not included in the checksum. */ | |
403 | c = HDR_LENGTH - 1; | |
404 | p = hdr + 1; | |
405 | while (c-- != 0) | |
406 | cksum += *p++; | |
407 | ||
408 | c = len; | |
409 | p = data; | |
410 | while (c-- != 0) | |
411 | cksum += *p++; | |
412 | ||
413 | return cksum; | |
414 | } | |
415 | ||
416 | /* Send a packet containing the given ASCII string. */ | |
417 | ||
418 | static void | |
419 | mips_send_packet (s) | |
420 | const char *s; | |
421 | { | |
422 | unsigned int len; | |
423 | unsigned char *packet; | |
424 | register int cksum; | |
425 | int try; | |
426 | ||
427 | len = strlen (s); | |
428 | if (len > DATA_MAXLEN) | |
429 | error ("MIPS protocol data packet too long: %s", s); | |
430 | ||
431 | packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1); | |
432 | ||
433 | packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq); | |
434 | packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq); | |
435 | packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq); | |
436 | packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq); | |
437 | ||
438 | memcpy (packet + HDR_LENGTH, s, len); | |
439 | ||
440 | cksum = mips_cksum (packet, packet + HDR_LENGTH, len); | |
441 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
442 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
443 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
444 | ||
445 | /* Increment the sequence number. This will set mips_send_seq to | |
446 | the sequence number we expect in the acknowledgement. */ | |
447 | mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS; | |
448 | ||
449 | /* We can only have one outstanding data packet, so we just wait for | |
450 | the acknowledgement here. Keep retransmitting the packet until | |
451 | we get one, or until we've tried too many times. */ | |
452 | for (try = 0; try < mips_send_retries; try++) | |
453 | { | |
454 | int garbage; | |
455 | int ch; | |
456 | ||
457 | if (mips_debug > 0) | |
458 | { | |
459 | packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0'; | |
460 | printf_filtered ("Writing \"%s\"\n", packet + 1); | |
461 | } | |
462 | ||
463 | if (serial_write (packet, HDR_LENGTH + len + TRLR_LENGTH) == 0) | |
464 | error ("write to target failed: %s", safe_strerror (errno)); | |
465 | ||
466 | garbage = 0; | |
467 | ch = 0; | |
468 | while (1) | |
469 | { | |
470 | unsigned char hdr[HDR_LENGTH + 1]; | |
471 | unsigned char trlr[TRLR_LENGTH + 1]; | |
472 | int err; | |
473 | int seq; | |
474 | ||
475 | /* Get the packet header. If we time out, resend the data | |
476 | packet. */ | |
477 | err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait); | |
478 | if (err != 0) | |
479 | break; | |
480 | ||
481 | ch = 0; | |
482 | ||
483 | /* If we get a data packet, assume it is a duplicate and | |
484 | ignore it. FIXME: If the acknowledgement is lost, this | |
485 | data packet may be the packet the remote sends after the | |
486 | acknowledgement. */ | |
487 | if (HDR_IS_DATA (hdr)) | |
488 | continue; | |
489 | ||
490 | /* If the length is not 0, this is a garbled packet. */ | |
491 | if (HDR_GET_LEN (hdr) != 0) | |
492 | continue; | |
493 | ||
494 | /* Get the packet trailer. */ | |
495 | err = mips_receive_trailer (trlr, &garbage, &ch, | |
496 | mips_retransmit_wait); | |
497 | ||
498 | /* If we timed out, resend the data packet. */ | |
499 | if (err == -1) | |
500 | break; | |
501 | ||
502 | /* If we got a bad character, reread the header. */ | |
503 | if (err != 0) | |
504 | continue; | |
505 | ||
506 | /* If the checksum does not match the trailer checksum, this | |
507 | is a bad packet; ignore it. */ | |
508 | if (mips_cksum (hdr, (unsigned char *) NULL, 0) | |
509 | != TRLR_GET_CKSUM (trlr)) | |
510 | continue; | |
511 | ||
512 | if (mips_debug > 0) | |
513 | { | |
514 | hdr[HDR_LENGTH] = '\0'; | |
515 | trlr[TRLR_LENGTH] = '\0'; | |
516 | printf_filtered ("Got ack %d \"%s%s\"\n", | |
517 | HDR_GET_SEQ (hdr), hdr, trlr); | |
518 | } | |
519 | ||
520 | /* If this ack is for the current packet, we're done. */ | |
521 | seq = HDR_GET_SEQ (hdr); | |
522 | if (seq == mips_send_seq) | |
523 | return; | |
524 | ||
525 | /* If this ack is for the last packet, resend the current | |
526 | packet. */ | |
527 | if ((seq + 1) % SEQ_MODULOS == mips_send_seq) | |
528 | break; | |
529 | ||
530 | /* Otherwise this is a bad ack; ignore it. Increment the | |
531 | garbage count to ensure that we do not stay in this loop | |
532 | forever. */ | |
533 | ++garbage; | |
534 | } | |
535 | } | |
536 | ||
537 | error ("Remote did not acknowledge packet"); | |
538 | } | |
539 | ||
540 | /* Receive and acknowledge a packet, returning the data in BUFF (which | |
541 | should be DATA_MAXLEN + 1 bytes). The protocol documentation | |
542 | implies that only the sender retransmits packets, so this code just | |
543 | waits silently for a packet. It returns the length of the received | |
544 | packet. */ | |
545 | ||
546 | static int | |
547 | mips_receive_packet (buff) | |
548 | char *buff; | |
549 | { | |
550 | int ch; | |
551 | int garbage; | |
552 | int len; | |
553 | unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1]; | |
554 | int cksum; | |
555 | ||
556 | ch = 0; | |
557 | garbage = 0; | |
558 | while (1) | |
559 | { | |
560 | unsigned char hdr[HDR_LENGTH]; | |
561 | unsigned char trlr[TRLR_LENGTH]; | |
562 | int i; | |
563 | int err; | |
564 | ||
565 | if (mips_receive_header (hdr, &garbage, ch, mips_receive_wait) != 0) | |
566 | error ("Timed out waiting for remote packet"); | |
567 | ||
568 | ch = 0; | |
569 | ||
570 | /* An acknowledgement is probably a duplicate; ignore it. */ | |
571 | if (! HDR_IS_DATA (hdr)) | |
572 | { | |
573 | if (mips_debug > 0) | |
574 | printf_filtered ("Ignoring unexpected ACK\n"); | |
575 | continue; | |
576 | } | |
577 | ||
578 | /* If this is the wrong sequence number, ignore it. */ | |
579 | if (HDR_GET_SEQ (hdr) != mips_receive_seq) | |
580 | { | |
581 | if (mips_debug > 0) | |
582 | printf_filtered ("Ignoring sequence number %d (want %d)\n", | |
583 | HDR_GET_SEQ (hdr), mips_receive_seq); | |
584 | continue; | |
585 | } | |
586 | ||
587 | len = HDR_GET_LEN (hdr); | |
588 | ||
589 | for (i = 0; i < len; i++) | |
590 | { | |
591 | int rch; | |
592 | ||
593 | rch = mips_readchar (mips_receive_wait); | |
594 | if (rch == SYN) | |
595 | { | |
596 | ch = SYN; | |
597 | break; | |
598 | } | |
599 | if (rch == -2) | |
600 | error ("Timed out waiting for remote packet"); | |
601 | buff[i] = rch; | |
602 | } | |
603 | ||
604 | if (i < len) | |
605 | { | |
606 | if (mips_debug > 0) | |
607 | printf_filtered ("Got new SYN after %d chars (wanted %d)\n", | |
608 | i, len); | |
609 | continue; | |
610 | } | |
611 | ||
612 | err = mips_receive_trailer (trlr, &garbage, &ch, mips_receive_wait); | |
613 | if (err == -1) | |
614 | error ("Timed out waiting for packet"); | |
615 | if (err == -2) | |
616 | { | |
617 | if (mips_debug > 0) | |
618 | printf_filtered ("Got SYN when wanted trailer\n"); | |
619 | continue; | |
620 | } | |
621 | ||
622 | if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr)) | |
623 | break; | |
624 | ||
625 | if (mips_debug > 0) | |
626 | printf_filtered ("Bad checksum; data %d, trailer %d\n", | |
627 | mips_cksum (hdr, buff, len), | |
628 | TRLR_GET_CKSUM (trlr)); | |
629 | ||
630 | /* The checksum failed. Send an acknowledgement for the | |
631 | previous packet to tell the remote to resend the packet. */ | |
632 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); | |
633 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
634 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
635 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
636 | ||
637 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
638 | ||
639 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
640 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
641 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
642 | ||
643 | if (mips_debug > 0) | |
644 | { | |
645 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
646 | printf_filtered ("Writing ack %d \"%s\"\n", mips_receive_seq, | |
647 | ack + 1); | |
648 | } | |
649 | ||
650 | if (serial_write (ack, HDR_LENGTH + TRLR_LENGTH) == 0) | |
651 | error ("write to target failed: %s", safe_strerror (errno)); | |
652 | } | |
653 | ||
654 | if (mips_debug > 0) | |
655 | { | |
656 | buff[len] = '\0'; | |
657 | printf_filtered ("Got packet \"%s\"\n", buff); | |
658 | } | |
659 | ||
660 | /* We got the packet. Send an acknowledgement. */ | |
661 | mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS; | |
662 | ||
663 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); | |
664 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
665 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
666 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
667 | ||
668 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
669 | ||
670 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
671 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
672 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
673 | ||
674 | if (mips_debug > 0) | |
675 | { | |
676 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
677 | printf_filtered ("Writing ack %d \"%s\"\n", mips_receive_seq, | |
678 | ack + 1); | |
679 | } | |
680 | ||
681 | if (serial_write (ack, HDR_LENGTH + TRLR_LENGTH) == 0) | |
682 | error ("write to target failed: %s", safe_strerror (errno)); | |
683 | ||
684 | return len; | |
685 | } | |
686 | \f | |
687 | /* Optionally send a request to the remote system and optionally wait | |
688 | for the reply. This implements the remote debugging protocol, | |
689 | which is built on top of the packet protocol defined above. Each | |
690 | request has an ADDR argument and a DATA argument. The following | |
691 | requests are defined: | |
692 | ||
693 | \0 don't send a request; just wait for a reply | |
694 | i read word from instruction space at ADDR | |
695 | d read word from data space at ADDR | |
696 | I write DATA to instruction space at ADDR | |
697 | D write DATA to data space at ADDR | |
698 | r read register number ADDR | |
699 | R set register number ADDR to value DATA | |
700 | c continue execution (if ADDR != 1, set pc to ADDR) | |
701 | s single step (if ADDR != 1, set pc to ADDR) | |
702 | ||
703 | The read requests return the value requested. The write requests | |
704 | return the previous value in the changed location. The execution | |
705 | requests return a UNIX wait value (the approximate signal which | |
706 | caused execution to stop is in the upper eight bits). | |
707 | ||
708 | If PERR is not NULL, this function waits for a reply. If an error | |
709 | occurs, it sets *PERR to 1 and sets errno according to what the | |
710 | target board reports. */ | |
711 | ||
712 | static int | |
713 | mips_request (cmd, addr, data, perr) | |
714 | char cmd; | |
715 | unsigned int addr; | |
716 | unsigned int data; | |
717 | int *perr; | |
718 | { | |
719 | char buff[DATA_MAXLEN + 1]; | |
720 | int len; | |
721 | int rpid; | |
722 | char rcmd; | |
723 | int rerrflg; | |
724 | int rresponse; | |
725 | ||
726 | if (cmd != '\0') | |
727 | { | |
728 | if (mips_need_reply) | |
729 | fatal ("mips_request: Trying to send command before reply"); | |
730 | sprintf (buff, "0x0 %c 0x%x 0x%x", cmd, addr, data); | |
731 | mips_send_packet (buff); | |
732 | mips_need_reply = 1; | |
733 | } | |
734 | ||
735 | if (perr == (int *) NULL) | |
736 | return 0; | |
737 | ||
738 | if (! mips_need_reply) | |
739 | fatal ("mips_request: Trying to get reply before command"); | |
740 | ||
741 | mips_need_reply = 0; | |
742 | ||
743 | len = mips_receive_packet (buff); | |
744 | buff[len] = '\0'; | |
745 | ||
746 | if (sscanf (buff, "0x%x %c 0x%x 0x%x", | |
747 | &rpid, &rcmd, &rerrflg, &rresponse) != 4 | |
748 | || rpid != 0 | |
749 | || (cmd != '\0' && rcmd != cmd)) | |
750 | error ("Bad response from remote board"); | |
751 | ||
752 | if (rerrflg != 0) | |
753 | { | |
754 | *perr = 1; | |
755 | ||
756 | /* FIXME: This will returns MIPS errno numbers, which may or may | |
757 | not be the same as errno values used on other systems. If | |
758 | they stick to common errno values, they will be the same, but | |
759 | if they don't, they must be translated. */ | |
760 | errno = rresponse; | |
761 | ||
762 | return 0; | |
763 | } | |
764 | ||
765 | *perr = 0; | |
766 | return rresponse; | |
767 | } | |
768 | ||
769 | /* Open a connection to the remote board. */ | |
770 | ||
771 | static void | |
772 | mips_open (name, from_tty) | |
773 | char *name; | |
774 | int from_tty; | |
775 | { | |
776 | int err; | |
777 | char cr; | |
778 | char buff[DATA_MAXLEN + 1]; | |
779 | ||
780 | if (name == 0) | |
781 | error ( | |
782 | "To open a MIPS remote debugging connection, you need to specify what serial\n\ | |
783 | device is attached to the target board (e.g., /dev/ttya)."); | |
784 | ||
785 | target_preopen (from_tty); | |
786 | ||
787 | if (mips_is_open) | |
788 | mips_close (0); | |
789 | ||
790 | if (serial_open (name) == 0) | |
791 | perror_with_name (name); | |
792 | ||
793 | mips_is_open = 1; | |
794 | ||
795 | /* The board seems to want to send us a packet. I don't know what | |
796 | it means. */ | |
797 | cr = '\r'; | |
798 | serial_write (&cr, 1); | |
799 | mips_receive_packet (buff); | |
800 | ||
801 | /* If this doesn't call error, we have connected; we don't care if | |
802 | the request itself succeeds or fails. */ | |
803 | mips_request ('r', (unsigned int) 0, (unsigned int) 0, &err); | |
804 | ||
805 | if (from_tty) | |
806 | printf ("Remote MIPS debugging using %s\n", name); | |
807 | push_target (&mips_ops); /* Switch to using remote target now */ | |
808 | ||
809 | start_remote (); /* Initialize gdb process mechanisms */ | |
810 | } | |
811 | ||
812 | /* Close a connection to the remote board. */ | |
813 | ||
814 | static void | |
815 | mips_close (quitting) | |
816 | int quitting; | |
817 | { | |
818 | if (mips_is_open) | |
819 | { | |
820 | /* Get the board out of remote debugging mode. */ | |
821 | mips_request ('x', (unsigned int) 0, (unsigned int) 0, | |
822 | (int *) NULL); | |
823 | serial_close (); | |
824 | mips_is_open = 0; | |
825 | } | |
826 | } | |
827 | ||
828 | /* Detach from the remote board. */ | |
829 | ||
830 | static void | |
831 | mips_detach (args, from_tty) | |
832 | char *args; | |
833 | int from_tty; | |
834 | { | |
835 | if (args) | |
836 | error ("Argument given to \"detach\" when remotely debugging."); | |
837 | ||
838 | pop_target (); | |
839 | if (from_tty) | |
840 | printf ("Ending remote MIPS debugging.\n"); | |
841 | } | |
842 | ||
843 | /* Tell the target board to resume. This does not wait for a reply | |
844 | from the board. */ | |
845 | ||
846 | static void | |
847 | mips_resume (step, siggnal) | |
848 | int step, siggnal; | |
849 | { | |
850 | if (siggnal) | |
851 | error ("Can't send signals to a remote system. Try `handle %d ignore'.", | |
852 | siggnal); | |
853 | ||
854 | mips_request (step ? 's' : 'c', | |
855 | (unsigned int) read_register (PC_REGNUM), | |
856 | (unsigned int) 0, | |
857 | (int *) NULL); | |
858 | } | |
859 | ||
860 | /* Wait until the remote stops, and return a wait status. */ | |
861 | ||
862 | static int | |
863 | mips_wait (status) | |
864 | WAITTYPE *status; | |
865 | { | |
866 | int rstatus; | |
867 | int err; | |
868 | ||
869 | /* If we have not sent a single step or continue command, then the | |
870 | board is waiting for us to do something. Return a status | |
871 | indicating that it is stopped. */ | |
872 | if (! mips_need_reply) | |
873 | { | |
874 | WSETSTOP (*status, SIGTRAP); | |
875 | return 0; | |
876 | } | |
877 | ||
878 | rstatus = mips_request ('\0', (unsigned int) 0, (unsigned int) 0, &err); | |
879 | if (err) | |
880 | error ("Remote failure: %s", safe_strerror (errno)); | |
881 | ||
882 | /* FIXME: The target board uses numeric signal values which are | |
883 | those used on MIPS systems. If the host uses different signal | |
884 | values, we need to translate here. I believe all Unix systems | |
885 | use the same values for the signals the board can return, which | |
886 | are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */ | |
887 | ||
888 | /* FIXME: The target board uses a standard Unix wait status int. If | |
889 | the host system does not, we must translate here. */ | |
890 | ||
891 | *status = rstatus; | |
892 | ||
893 | return 0; | |
894 | } | |
895 | ||
896 | /* We have to map between the register numbers used by gdb and the | |
897 | register numbers used by the debugging protocol. This function | |
898 | assumes that we are using tm-mips.h. */ | |
899 | ||
900 | #define REGNO_OFFSET 96 | |
901 | ||
902 | static int | |
903 | mips_map_regno (regno) | |
904 | int regno; | |
905 | { | |
906 | if (regno < 32) | |
907 | return regno; | |
908 | if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32) | |
909 | return regno - FP0_REGNUM + 32; | |
910 | switch (regno) | |
911 | { | |
912 | case PC_REGNUM: | |
913 | return REGNO_OFFSET + 0; | |
914 | case CAUSE_REGNUM: | |
915 | return REGNO_OFFSET + 1; | |
916 | case HI_REGNUM: | |
917 | return REGNO_OFFSET + 2; | |
918 | case LO_REGNUM: | |
919 | return REGNO_OFFSET + 3; | |
920 | case FCRCS_REGNUM: | |
921 | return REGNO_OFFSET + 4; | |
922 | case FCRIR_REGNUM: | |
923 | return REGNO_OFFSET + 5; | |
924 | default: | |
925 | /* FIXME: Is there a way to get the status register? */ | |
926 | return 0; | |
927 | } | |
928 | } | |
929 | ||
930 | /* Fetch the remote registers. */ | |
931 | ||
932 | static void | |
933 | mips_fetch_registers (regno) | |
934 | int regno; | |
935 | { | |
936 | REGISTER_TYPE val; | |
937 | int err; | |
938 | ||
939 | if (regno == -1) | |
940 | { | |
941 | for (regno = 0; regno < NUM_REGS; regno++) | |
942 | mips_fetch_registers (regno); | |
943 | return; | |
944 | } | |
945 | ||
946 | val = mips_request ('r', (unsigned int) mips_map_regno (regno), | |
947 | (unsigned int) 0, &err); | |
948 | if (err) | |
949 | error ("Can't read register %d: %s", regno, safe_strerror (errno)); | |
950 | ||
951 | /* We got the number the register holds, but gdb expects to see a | |
952 | value in the target byte ordering. */ | |
953 | SWAP_TARGET_AND_HOST (val, sizeof (REGISTER_TYPE)); | |
954 | supply_register (regno, (char *) &val); | |
955 | } | |
956 | ||
957 | /* Prepare to store registers. The MIPS protocol can store individual | |
958 | registers, so this function doesn't have to do anything. */ | |
959 | ||
960 | static void | |
961 | mips_prepare_to_store () | |
962 | { | |
963 | } | |
964 | ||
965 | /* Store remote register(s). */ | |
966 | ||
967 | static void | |
968 | mips_store_registers (regno) | |
969 | int regno; | |
970 | { | |
971 | int err; | |
972 | ||
973 | if (regno == -1) | |
974 | { | |
975 | for (regno = 0; regno < NUM_REGS; regno++) | |
976 | mips_store_registers (regno); | |
977 | return; | |
978 | } | |
979 | ||
980 | mips_request ('R', (unsigned int) mips_map_regno (regno), | |
981 | (unsigned int) read_register (regno), | |
982 | &err); | |
983 | if (err) | |
984 | error ("Can't write register %d: %s", regno, safe_strerror (errno)); | |
985 | } | |
986 | ||
987 | /* Fetch a word from the target board. */ | |
988 | ||
989 | static int | |
990 | mips_fetch_word (addr) | |
991 | CORE_ADDR addr; | |
992 | { | |
993 | int val; | |
994 | int err; | |
995 | ||
996 | val = mips_request ('d', (unsigned int) addr, (unsigned int) 0, &err); | |
997 | if (err) | |
998 | { | |
999 | /* Data space failed; try instruction space. */ | |
1000 | val = mips_request ('i', (unsigned int) addr, (unsigned int) 0, &err); | |
1001 | if (err) | |
1002 | error ("Can't read address 0x%x: %s", addr, safe_strerror (errno)); | |
1003 | } | |
1004 | return val; | |
1005 | } | |
1006 | ||
1007 | /* Store a word to the target board. */ | |
1008 | ||
1009 | static void | |
1010 | mips_store_word (addr, val) | |
1011 | CORE_ADDR addr; | |
1012 | int val; | |
1013 | { | |
1014 | int err; | |
1015 | ||
1016 | mips_request ('D', (unsigned int) addr, (unsigned int) val, &err); | |
1017 | if (err) | |
1018 | { | |
1019 | /* Data space failed; try instruction space. */ | |
1020 | mips_request ('I', (unsigned int) addr, (unsigned int) val, &err); | |
1021 | if (err) | |
1022 | error ("Can't write address 0x%x: %s", addr, safe_strerror (errno)); | |
1023 | } | |
1024 | } | |
1025 | ||
1026 | /* Read or write LEN bytes from inferior memory at MEMADDR, | |
1027 | transferring to or from debugger address MYADDR. Write to inferior | |
1028 | if SHOULD_WRITE is nonzero. Returns length of data written or | |
1029 | read; 0 for error. Note that protocol gives us the correct value | |
1030 | for a longword, since it transfers values in ASCII. We want the | |
1031 | byte values, so we have to swap the longword values. */ | |
1032 | ||
1033 | static int | |
1034 | mips_xfer_memory (memaddr, myaddr, len, write, ignore) | |
1035 | CORE_ADDR memaddr; | |
1036 | char *myaddr; | |
1037 | int len; | |
1038 | int write; | |
1039 | struct target_ops *ignore; | |
1040 | { | |
1041 | register int i; | |
1042 | /* Round starting address down to longword boundary. */ | |
1043 | register CORE_ADDR addr = memaddr &~ 3; | |
1044 | /* Round ending address up; get number of longwords that makes. */ | |
1045 | register int count = (((memaddr + len) - addr) + 3) / 4; | |
1046 | /* Allocate buffer of that many longwords. */ | |
1047 | register unsigned int *buffer = (unsigned int *) alloca (count * 4); | |
1048 | ||
1049 | if (write) | |
1050 | { | |
1051 | /* Fill start and end extra bytes of buffer with existing data. */ | |
1052 | if (addr != memaddr || len < 4) | |
1053 | { | |
1054 | /* Need part of initial word -- fetch it. */ | |
1055 | buffer[0] = mips_fetch_word (addr); | |
1056 | SWAP_TARGET_AND_HOST (buffer, 4); | |
1057 | } | |
1058 | ||
1059 | if (count > 1) /* FIXME, avoid if even boundary */ | |
1060 | { | |
1061 | buffer[count - 1] = mips_fetch_word (addr + (count - 1) * 4); | |
1062 | SWAP_TARGET_AND_HOST (buffer + (count - 1) * 4, 4); | |
1063 | } | |
1064 | ||
1065 | /* Copy data to be written over corresponding part of buffer */ | |
1066 | ||
1067 | memcpy ((char *) buffer + (memaddr & 3), myaddr, len); | |
1068 | ||
1069 | /* Write the entire buffer. */ | |
1070 | ||
1071 | for (i = 0; i < count; i++, addr += 4) | |
1072 | { | |
1073 | SWAP_TARGET_AND_HOST (buffer + i, 4); | |
1074 | mips_store_word (addr, buffer[i]); | |
1075 | } | |
1076 | } | |
1077 | else | |
1078 | { | |
1079 | /* Read all the longwords */ | |
1080 | for (i = 0; i < count; i++, addr += 4) | |
1081 | { | |
1082 | buffer[i] = mips_fetch_word (addr); | |
1083 | SWAP_TARGET_AND_HOST (buffer + i, 4); | |
1084 | QUIT; | |
1085 | } | |
1086 | ||
1087 | /* Copy appropriate bytes out of the buffer. */ | |
1088 | memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); | |
1089 | } | |
1090 | return len; | |
1091 | } | |
1092 | ||
1093 | /* Print info on this target. */ | |
1094 | ||
1095 | static void | |
1096 | mips_files_info (ignore) | |
1097 | struct target_ops *ignore; | |
1098 | { | |
1099 | printf ("Debugging a MIPS board over a serial line.\n"); | |
1100 | } | |
1101 | ||
1102 | /* Load an executable onto the board. */ | |
1103 | ||
1104 | static void | |
1105 | mips_load (args, from_tty) | |
1106 | char *args; | |
1107 | int from_tty; | |
1108 | { | |
1109 | bfd *abfd; | |
1110 | asection *s; | |
1111 | int err; | |
1112 | ||
1113 | abfd = bfd_openr (args, 0); | |
1114 | if (abfd == (bfd *) NULL) | |
1115 | error ("Unable to open file %s", args); | |
1116 | ||
1117 | if (bfd_check_format (abfd, bfd_object) == 0) | |
1118 | error ("%s: Not an object file", args); | |
1119 | ||
1120 | for (s = abfd->sections; s != (asection *) NULL; s = s->next) | |
1121 | { | |
1122 | if ((s->flags & SEC_LOAD) != 0) | |
1123 | { | |
1124 | bfd_size_type size; | |
1125 | ||
1126 | size = bfd_get_section_size_before_reloc (s); | |
1127 | if (size > 0) | |
1128 | { | |
1129 | char *buffer; | |
1130 | struct cleanup *old_chain; | |
1131 | bfd_vma vma; | |
1132 | ||
1133 | buffer = xmalloc (size); | |
1134 | old_chain = make_cleanup (free, buffer); | |
1135 | ||
1136 | vma = bfd_get_section_vma (abfd, s); | |
1137 | printf_filtered ("Loading section %s, size 0x%x vma 0x%x\n", | |
1138 | bfd_get_section_name (abfd, s), size, vma); | |
1139 | bfd_get_section_contents (abfd, s, buffer, 0, size); | |
1140 | mips_xfer_memory (vma, buffer, size, 1, &mips_ops); | |
1141 | ||
1142 | do_cleanups (old_chain); | |
1143 | } | |
1144 | } | |
1145 | } | |
1146 | ||
1147 | mips_request ('R', (unsigned int) mips_map_regno (PC_REGNUM), | |
1148 | (unsigned int) abfd->start_address, | |
1149 | &err); | |
1150 | if (err) | |
1151 | error ("Can't write PC register: %s", safe_strerror (errno)); | |
1152 | ||
1153 | bfd_close (abfd); | |
1154 | ||
1155 | /* FIXME: Should we call symbol_file_add here? */ | |
1156 | } | |
1157 | ||
1158 | /* Start running on the target board. */ | |
1159 | ||
1160 | static void | |
1161 | mips_create_inferior (execfile, args, env) | |
1162 | char *execfile; | |
1163 | char *args; | |
1164 | char **env; | |
1165 | { | |
1166 | CORE_ADDR entry_pt; | |
1167 | ||
1168 | /* FIXME: Actually, we probably could pass arguments. */ | |
1169 | if (args && *args) | |
1170 | error ("Can't pass arguments to remote MIPS board."); | |
1171 | ||
1172 | if (execfile == 0 || exec_bfd == 0) | |
1173 | error ("No exec file specified"); | |
1174 | ||
1175 | entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd); | |
1176 | ||
1177 | init_wait_for_inferior (); | |
1178 | ||
1179 | proceed (entry_pt, -1, 0); | |
1180 | } | |
1181 | ||
1182 | /* Clean up after a process. Actually nothing to do. */ | |
1183 | ||
1184 | static void | |
1185 | mips_mourn_inferior () | |
1186 | { | |
1187 | generic_mourn_inferior (); | |
1188 | } | |
1189 | \f | |
1190 | /* The target vector. */ | |
1191 | ||
1192 | struct target_ops mips_ops = | |
1193 | { | |
1194 | "mips", /* to_shortname */ | |
1195 | "Remote MIPS debugging over serial line", /* to_longname */ | |
1196 | "Debug a board using the MIPS remote debugging protocol over a serial line.\n\ | |
1197 | Specify the serial device it is connected to (e.g., /dev/ttya).", /* to_doc */ | |
1198 | mips_open, /* to_open */ | |
1199 | mips_close, /* to_close */ | |
1200 | NULL, /* to_attach */ | |
1201 | mips_detach, /* to_detach */ | |
1202 | mips_resume, /* to_resume */ | |
1203 | mips_wait, /* to_wait */ | |
1204 | mips_fetch_registers, /* to_fetch_registers */ | |
1205 | mips_store_registers, /* to_store_registers */ | |
1206 | mips_prepare_to_store, /* to_prepare_to_store */ | |
1207 | mips_xfer_memory, /* to_xfer_memory */ | |
1208 | mips_files_info, /* to_files_info */ | |
1209 | NULL, /* to_insert_breakpoint */ | |
1210 | NULL, /* to_remove_breakpoint */ | |
1211 | NULL, /* to_terminal_init */ | |
1212 | NULL, /* to_terminal_inferior */ | |
1213 | NULL, /* to_terminal_ours_for_output */ | |
1214 | NULL, /* to_terminal_ours */ | |
1215 | NULL, /* to_terminal_info */ | |
1216 | NULL, /* to_kill */ | |
1217 | mips_load, /* to_load */ | |
1218 | NULL, /* to_lookup_symbol */ | |
1219 | mips_create_inferior, /* to_create_inferior */ | |
1220 | mips_mourn_inferior, /* to_mourn_inferior */ | |
1221 | NULL, /* to_can_run */ | |
1222 | NULL, /* to_notice_signals */ | |
1223 | process_stratum, /* to_stratum */ | |
1224 | NULL, /* to_next */ | |
1225 | 1, /* to_has_all_memory */ | |
1226 | 1, /* to_has_memory */ | |
1227 | 1, /* to_has_stack */ | |
1228 | 1, /* to_has_registers */ | |
1229 | 1, /* to_has_execution */ | |
1230 | NULL, /* sections */ | |
1231 | NULL, /* sections_end */ | |
1232 | OPS_MAGIC /* to_magic */ | |
1233 | }; | |
1234 | \f | |
1235 | void | |
1236 | _initialize_remote_mips () | |
1237 | { | |
1238 | add_target (&mips_ops); | |
1239 | ||
1240 | add_show_from_set ( | |
1241 | add_set_cmd ("remotedebug", no_class, var_zinteger, (char *) &mips_debug, | |
1242 | "Set debugging of remote MIPS serial I/O.\n\ | |
1243 | When non-zero, each packet sent or received with the remote target\n\ | |
1244 | is displayed. Higher numbers produce more debugging.", &setlist), | |
1245 | &showlist); | |
1246 | } |