Commit | Line | Data |
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33742334 | 1 | /* Remote debugging interface for MIPS remote debugging protocol. |
4887063b | 2 | Copyright 1993, 1994, 1995 Free Software Foundation, Inc. |
33742334 ILT |
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 | |
6c9638b4 | 20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
33742334 ILT |
21 | |
22 | #include "defs.h" | |
23 | #include "inferior.h" | |
24 | #include "bfd.h" | |
77641260 | 25 | #include "symfile.h" |
33742334 ILT |
26 | #include "wait.h" |
27 | #include "gdbcmd.h" | |
28 | #include "gdbcore.h" | |
29 | #include "serial.h" | |
30 | #include "target.h" | |
66a48870 | 31 | #include "remote-utils.h" |
33742334 ILT |
32 | |
33 | #include <signal.h> | |
73d3dbd4 | 34 | #ifdef ANSI_PROTOTYPES |
85c613aa C |
35 | #include <stdarg.h> |
36 | #else | |
96e5f161 | 37 | #include <varargs.h> |
85c613aa | 38 | #endif |
ae55bdbc SS |
39 | |
40 | extern char *mips_read_processor_type PARAMS ((void)); | |
41 | ||
42 | extern void mips_set_processor_type_command PARAMS ((char *, int)); | |
43 | ||
33742334 ILT |
44 | \f |
45 | /* Prototypes for local functions. */ | |
46 | ||
ae55bdbc | 47 | static int mips_readchar PARAMS ((int timeout)); |
33742334 | 48 | |
ae55bdbc SS |
49 | static int mips_receive_header PARAMS ((unsigned char *hdr, int *pgarbage, |
50 | int ch, int timeout)); | |
33742334 | 51 | |
ae55bdbc SS |
52 | static int mips_receive_trailer PARAMS ((unsigned char *trlr, int *pgarbage, |
53 | int *pch, int timeout)); | |
33742334 ILT |
54 | |
55 | static int mips_cksum PARAMS ((const unsigned char *hdr, | |
56 | const unsigned char *data, | |
57 | int len)); | |
58 | ||
ae55bdbc | 59 | static void mips_send_packet PARAMS ((const char *s, int get_ack)); |
33742334 | 60 | |
4c6071f7 JK |
61 | static int mips_receive_packet PARAMS ((char *buff, int throw_error, |
62 | int timeout)); | |
33742334 | 63 | |
ae55bdbc SS |
64 | static int mips_request PARAMS ((char cmd, unsigned int addr, |
65 | unsigned int data, int *perr, int timeout)); | |
33742334 | 66 | |
ae55bdbc | 67 | static void mips_initialize PARAMS ((void)); |
c2a0f1cb | 68 | |
ae55bdbc | 69 | static void mips_open PARAMS ((char *name, int from_tty)); |
33742334 | 70 | |
ae55bdbc | 71 | static void mips_close PARAMS ((int quitting)); |
33742334 | 72 | |
ae55bdbc | 73 | static void mips_detach PARAMS ((char *args, int from_tty)); |
33742334 | 74 | |
67ac9759 JK |
75 | static void mips_resume PARAMS ((int pid, int step, |
76 | enum target_signal siggnal)); | |
33742334 | 77 | |
ae55bdbc | 78 | static int mips_wait PARAMS ((int pid, struct target_waitstatus *status)); |
33742334 | 79 | |
ae55bdbc | 80 | static int mips_map_regno PARAMS ((int regno)); |
33742334 | 81 | |
ae55bdbc | 82 | static void mips_fetch_registers PARAMS ((int regno)); |
33742334 | 83 | |
ae55bdbc | 84 | static void mips_prepare_to_store PARAMS ((void)); |
33742334 | 85 | |
ae55bdbc | 86 | static void mips_store_registers PARAMS ((int regno)); |
33742334 | 87 | |
ae55bdbc | 88 | static int mips_fetch_word PARAMS ((CORE_ADDR addr)); |
33742334 | 89 | |
ae55bdbc SS |
90 | static int mips_store_word PARAMS ((CORE_ADDR addr, int value, |
91 | char *old_contents)); | |
33742334 | 92 | |
ae55bdbc SS |
93 | static int mips_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, int len, |
94 | int write, struct target_ops *ignore)); | |
33742334 | 95 | |
ae55bdbc | 96 | static void mips_files_info PARAMS ((struct target_ops *ignore)); |
33742334 | 97 | |
ae55bdbc SS |
98 | static void mips_create_inferior PARAMS ((char *execfile, char *args, |
99 | char **env)); | |
33742334 | 100 | |
ae55bdbc | 101 | static void mips_mourn_inferior PARAMS ((void)); |
33742334 ILT |
102 | |
103 | /* A forward declaration. */ | |
104 | extern struct target_ops mips_ops; | |
105 | \f | |
106 | /* The MIPS remote debugging interface is built on top of a simple | |
107 | packet protocol. Each packet is organized as follows: | |
108 | ||
109 | SYN The first character is always a SYN (ASCII 026, or ^V). SYN | |
110 | may not appear anywhere else in the packet. Any time a SYN is | |
111 | seen, a new packet should be assumed to have begun. | |
112 | ||
113 | TYPE_LEN | |
114 | This byte contains the upper five bits of the logical length | |
115 | of the data section, plus a single bit indicating whether this | |
116 | is a data packet or an acknowledgement. The documentation | |
117 | indicates that this bit is 1 for a data packet, but the actual | |
118 | board uses 1 for an acknowledgement. The value of the byte is | |
119 | 0x40 + (ack ? 0x20 : 0) + (len >> 6) | |
120 | (we always have 0 <= len < 1024). Acknowledgement packets do | |
121 | not carry data, and must have a data length of 0. | |
122 | ||
123 | LEN1 This byte contains the lower six bits of the logical length of | |
124 | the data section. The value is | |
125 | 0x40 + (len & 0x3f) | |
126 | ||
127 | SEQ This byte contains the six bit sequence number of the packet. | |
128 | The value is | |
129 | 0x40 + seq | |
130 | An acknowlegment packet contains the sequence number of the | |
4887063b | 131 | packet being acknowledged plus 1 modulo 64. Data packets are |
33742334 ILT |
132 | transmitted in sequence. There may only be one outstanding |
133 | unacknowledged data packet at a time. The sequence numbers | |
134 | are independent in each direction. If an acknowledgement for | |
135 | the previous packet is received (i.e., an acknowledgement with | |
136 | the sequence number of the packet just sent) the packet just | |
137 | sent should be retransmitted. If no acknowledgement is | |
138 | received within a timeout period, the packet should be | |
139 | retransmitted. This has an unfortunate failure condition on a | |
140 | high-latency line, as a delayed acknowledgement may lead to an | |
141 | endless series of duplicate packets. | |
142 | ||
143 | DATA The actual data bytes follow. The following characters are | |
144 | escaped inline with DLE (ASCII 020, or ^P): | |
145 | SYN (026) DLE S | |
146 | DLE (020) DLE D | |
147 | ^C (003) DLE C | |
148 | ^S (023) DLE s | |
149 | ^Q (021) DLE q | |
150 | The additional DLE characters are not counted in the logical | |
151 | length stored in the TYPE_LEN and LEN1 bytes. | |
152 | ||
153 | CSUM1 | |
154 | CSUM2 | |
155 | CSUM3 | |
156 | These bytes contain an 18 bit checksum of the complete | |
157 | contents of the packet excluding the SEQ byte and the | |
158 | CSUM[123] bytes. The checksum is simply the twos complement | |
159 | addition of all the bytes treated as unsigned characters. The | |
160 | values of the checksum bytes are: | |
161 | CSUM1: 0x40 + ((cksum >> 12) & 0x3f) | |
162 | CSUM2: 0x40 + ((cksum >> 6) & 0x3f) | |
163 | CSUM3: 0x40 + (cksum & 0x3f) | |
164 | ||
165 | It happens that the MIPS remote debugging protocol always | |
166 | communicates with ASCII strings. Because of this, this | |
167 | implementation doesn't bother to handle the DLE quoting mechanism, | |
168 | since it will never be required. */ | |
169 | ||
170 | /* The SYN character which starts each packet. */ | |
171 | #define SYN '\026' | |
172 | ||
173 | /* The 0x40 used to offset each packet (this value ensures that all of | |
174 | the header and trailer bytes, other than SYN, are printable ASCII | |
175 | characters). */ | |
176 | #define HDR_OFFSET 0x40 | |
177 | ||
178 | /* The indices of the bytes in the packet header. */ | |
179 | #define HDR_INDX_SYN 0 | |
180 | #define HDR_INDX_TYPE_LEN 1 | |
181 | #define HDR_INDX_LEN1 2 | |
182 | #define HDR_INDX_SEQ 3 | |
183 | #define HDR_LENGTH 4 | |
184 | ||
185 | /* The data/ack bit in the TYPE_LEN header byte. */ | |
186 | #define TYPE_LEN_DA_BIT 0x20 | |
187 | #define TYPE_LEN_DATA 0 | |
188 | #define TYPE_LEN_ACK TYPE_LEN_DA_BIT | |
189 | ||
190 | /* How to compute the header bytes. */ | |
191 | #define HDR_SET_SYN(data, len, seq) (SYN) | |
192 | #define HDR_SET_TYPE_LEN(data, len, seq) \ | |
193 | (HDR_OFFSET \ | |
194 | + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \ | |
195 | + (((len) >> 6) & 0x1f)) | |
196 | #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f)) | |
197 | #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq)) | |
198 | ||
199 | /* Check that a header byte is reasonable. */ | |
200 | #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET) | |
201 | ||
202 | /* Get data from the header. These macros evaluate their argument | |
203 | multiple times. */ | |
204 | #define HDR_IS_DATA(hdr) \ | |
205 | (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA) | |
206 | #define HDR_GET_LEN(hdr) \ | |
207 | ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f))) | |
208 | #define HDR_GET_SEQ(hdr) ((hdr)[HDR_INDX_SEQ] & 0x3f) | |
209 | ||
210 | /* The maximum data length. */ | |
211 | #define DATA_MAXLEN 1023 | |
212 | ||
213 | /* The trailer offset. */ | |
214 | #define TRLR_OFFSET HDR_OFFSET | |
215 | ||
216 | /* The indices of the bytes in the packet trailer. */ | |
217 | #define TRLR_INDX_CSUM1 0 | |
218 | #define TRLR_INDX_CSUM2 1 | |
219 | #define TRLR_INDX_CSUM3 2 | |
220 | #define TRLR_LENGTH 3 | |
221 | ||
222 | /* How to compute the trailer bytes. */ | |
223 | #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f)) | |
224 | #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f)) | |
225 | #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f)) | |
226 | ||
227 | /* Check that a trailer byte is reasonable. */ | |
228 | #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET) | |
229 | ||
230 | /* Get data from the trailer. This evaluates its argument multiple | |
231 | times. */ | |
232 | #define TRLR_GET_CKSUM(trlr) \ | |
233 | ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \ | |
234 | + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \ | |
235 | + ((trlr)[TRLR_INDX_CSUM3] & 0x3f)) | |
236 | ||
237 | /* The sequence number modulos. */ | |
238 | #define SEQ_MODULOS (64) | |
239 | ||
240 | /* Set to 1 if the target is open. */ | |
241 | static int mips_is_open; | |
242 | ||
c2a0f1cb ILT |
243 | /* Set to 1 while the connection is being initialized. */ |
244 | static int mips_initializing; | |
245 | ||
33742334 ILT |
246 | /* The next sequence number to send. */ |
247 | static int mips_send_seq; | |
248 | ||
249 | /* The next sequence number we expect to receive. */ | |
250 | static int mips_receive_seq; | |
251 | ||
252 | /* The time to wait before retransmitting a packet, in seconds. */ | |
253 | static int mips_retransmit_wait = 3; | |
254 | ||
255 | /* The number of times to try retransmitting a packet before giving up. */ | |
256 | static int mips_send_retries = 10; | |
257 | ||
258 | /* The number of garbage characters to accept when looking for an | |
259 | SYN for the next packet. */ | |
260 | static int mips_syn_garbage = 1050; | |
261 | ||
262 | /* The time to wait for a packet, in seconds. */ | |
c2a0f1cb | 263 | static int mips_receive_wait = 5; |
33742334 ILT |
264 | |
265 | /* Set if we have sent a packet to the board but have not yet received | |
266 | a reply. */ | |
267 | static int mips_need_reply = 0; | |
268 | ||
1724c671 SG |
269 | /* Handle used to access serial I/O stream. */ |
270 | static serial_t mips_desc; | |
271 | ||
4fb192be JK |
272 | /* Handle low-level error that we can't recover from. Note that just |
273 | error()ing out from target_wait or some such low-level place will cause | |
274 | all hell to break loose--the rest of GDB will tend to get left in an | |
275 | inconsistent state. */ | |
276 | ||
2b9fbee4 | 277 | static NORETURN void |
73d3dbd4 | 278 | #ifdef ANSI_PROTOTYPES |
85c613aa C |
279 | mips_error (char *string, ...) |
280 | #else | |
4fb192be JK |
281 | mips_error (va_alist) |
282 | va_dcl | |
85c613aa | 283 | #endif |
4fb192be JK |
284 | { |
285 | va_list args; | |
4fb192be | 286 | |
73d3dbd4 | 287 | #ifdef ANSI_PROTOTYPES |
85c613aa C |
288 | va_start (args, string); |
289 | #else | |
290 | char *string; | |
4fb192be | 291 | va_start (args); |
85c613aa C |
292 | string = va_arg (args, char *); |
293 | #endif | |
294 | ||
4fb192be JK |
295 | target_terminal_ours (); |
296 | wrap_here(""); /* Force out any buffered output */ | |
297 | gdb_flush (gdb_stdout); | |
298 | if (error_pre_print) | |
299 | fprintf_filtered (gdb_stderr, error_pre_print); | |
4fb192be JK |
300 | vfprintf_filtered (gdb_stderr, string, args); |
301 | fprintf_filtered (gdb_stderr, "\n"); | |
302 | va_end (args); | |
303 | ||
96e5f161 JK |
304 | /* Clean up in such a way that mips_close won't try to talk to the |
305 | board (it almost surely won't work since we weren't able to talk to | |
306 | it). */ | |
307 | mips_is_open = 0; | |
308 | SERIAL_CLOSE (mips_desc); | |
309 | ||
310 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
4fb192be JK |
311 | target_mourn_inferior (); |
312 | ||
313 | return_to_top_level (RETURN_ERROR); | |
314 | } | |
315 | ||
9a9a88c1 ILT |
316 | /* Read a character from the remote, aborting on error. Returns |
317 | SERIAL_TIMEOUT on timeout (since that's what SERIAL_READCHAR | |
318 | returns). FIXME: If we see the string "<IDT>" from the board, then | |
319 | we are debugging on the main console port, and we have somehow | |
320 | dropped out of remote debugging mode. In this case, we | |
321 | automatically go back in to remote debugging mode. This is a hack, | |
322 | put in because I can't find any way for a program running on the | |
323 | remote board to terminate without also ending remote debugging | |
324 | mode. I assume users won't have any trouble with this; for one | |
325 | thing, the IDT documentation generally assumes that the remote | |
326 | debugging port is not the console port. This is, however, very | |
327 | convenient for DejaGnu when you only have one connected serial | |
328 | port. */ | |
33742334 | 329 | |
180fd370 JSC |
330 | /* CYGNUS LOCAL jsmith */ |
331 | /* The old code assumed a 5 character identification string, making it | |
332 | a chore to change the string value. However, we need to ensure | |
333 | that the method of ascertaining the length of the string is | |
334 | completely portable, without resorting to calling strlen(). */ | |
335 | ||
33742334 ILT |
336 | static int |
337 | mips_readchar (timeout) | |
338 | int timeout; | |
339 | { | |
340 | int ch; | |
c2a0f1cb | 341 | static int state = 0; |
180fd370 | 342 | static char nextstate[] = TARGET_MONITOR_PROMPT; /* CYGNUS LOCAL jsmith */ |
4887063b SG |
343 | #ifdef MAINTENANCE_CMDS |
344 | int i; | |
345 | ||
346 | i = timeout; | |
347 | if (i == -1 && watchdog > 0) | |
348 | i = watchdog; | |
349 | #endif | |
33742334 | 350 | |
180fd370 | 351 | if (state == (sizeof(nextstate) / sizeof(char))) /* CYGNUS LOCAL jsmith */ |
b0a0ee52 | 352 | timeout = 1; |
1724c671 | 353 | ch = SERIAL_READCHAR (mips_desc, timeout); |
4887063b SG |
354 | #ifdef MAINTENANCE_CMDS |
355 | if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off */ | |
356 | { | |
357 | target_mourn_inferior (); | |
358 | error ("Watchdog has expired. Target detached.\n"); | |
359 | } | |
360 | #endif | |
1724c671 | 361 | if (ch == SERIAL_EOF) |
4fb192be | 362 | mips_error ("End of file from remote"); |
1724c671 | 363 | if (ch == SERIAL_ERROR) |
4fb192be | 364 | mips_error ("Error reading from remote: %s", safe_strerror (errno)); |
66a48870 | 365 | if (sr_get_debug () > 1) |
33742334 | 366 | { |
47d52968 JK |
367 | /* Don't use _filtered; we can't deal with a QUIT out of |
368 | target_wait, and I think this might be called from there. */ | |
1724c671 | 369 | if (ch != SERIAL_TIMEOUT) |
47d52968 | 370 | printf_unfiltered ("Read '%c' %d 0x%x\n", ch, ch, ch); |
33742334 | 371 | else |
47d52968 | 372 | printf_unfiltered ("Timed out in read\n"); |
33742334 | 373 | } |
c2a0f1cb ILT |
374 | |
375 | /* If we have seen <IDT> and we either time out, or we see a @ | |
376 | (which was echoed from a packet we sent), reset the board as | |
377 | described above. The first character in a packet after the SYN | |
378 | (which is not echoed) is always an @ unless the packet is more | |
379 | than 64 characters long, which ours never are. */ | |
1724c671 | 380 | if ((ch == SERIAL_TIMEOUT || ch == '@') |
180fd370 | 381 | && state == (sizeof(nextstate) / sizeof(char)) /* CYGNUS LOCAL jsmith */ |
c2a0f1cb ILT |
382 | && ! mips_initializing) |
383 | { | |
66a48870 | 384 | if (sr_get_debug () > 0) |
47d52968 JK |
385 | /* Don't use _filtered; we can't deal with a QUIT out of |
386 | target_wait, and I think this might be called from there. */ | |
387 | printf_unfiltered ("Reinitializing MIPS debugging mode\n"); | |
7d13174e | 388 | SERIAL_WRITE (mips_desc, "\015db tty0\015", sizeof "\015db tty0\015" - 1); |
c2a0f1cb ILT |
389 | sleep (1); |
390 | ||
391 | mips_need_reply = 0; | |
392 | mips_initialize (); | |
393 | ||
394 | state = 0; | |
395 | ||
4887063b SG |
396 | /* At this point, about the only thing we can do is abort the command |
397 | in progress and get back to command level as quickly as possible. */ | |
398 | ||
399 | error ("Remote board reset, debug protocol re-initialized."); | |
c2a0f1cb ILT |
400 | } |
401 | ||
402 | if (ch == nextstate[state]) | |
403 | ++state; | |
404 | else | |
405 | state = 0; | |
406 | ||
33742334 ILT |
407 | return ch; |
408 | } | |
409 | ||
410 | /* Get a packet header, putting the data in the supplied buffer. | |
411 | PGARBAGE is a pointer to the number of garbage characters received | |
412 | so far. CH is the last character received. Returns 0 for success, | |
413 | or -1 for timeout. */ | |
414 | ||
415 | static int | |
416 | mips_receive_header (hdr, pgarbage, ch, timeout) | |
417 | unsigned char *hdr; | |
418 | int *pgarbage; | |
419 | int ch; | |
420 | int timeout; | |
421 | { | |
422 | int i; | |
423 | ||
424 | while (1) | |
425 | { | |
426 | /* Wait for a SYN. mips_syn_garbage is intended to prevent | |
427 | sitting here indefinitely if the board sends us one garbage | |
428 | character per second. ch may already have a value from the | |
429 | last time through the loop. */ | |
430 | while (ch != SYN) | |
431 | { | |
432 | ch = mips_readchar (timeout); | |
9a9a88c1 | 433 | if (ch == SERIAL_TIMEOUT) |
33742334 ILT |
434 | return -1; |
435 | if (ch != SYN) | |
436 | { | |
437 | /* Printing the character here lets the user of gdb see | |
438 | what the program is outputting, if the debugging is | |
47d52968 JK |
439 | being done on the console port. Don't use _filtered; |
440 | we can't deal with a QUIT out of target_wait. */ | |
66a48870 | 441 | if (! mips_initializing || sr_get_debug () > 0) |
c2a0f1cb | 442 | { |
7d13174e SS |
443 | if (ch < 0x20 && ch != '\n') |
444 | { | |
445 | putchar_unfiltered ('^'); | |
446 | putchar_unfiltered (ch + 0x40); | |
447 | } | |
448 | else | |
449 | putchar_unfiltered (ch); | |
199b2450 | 450 | gdb_flush (gdb_stdout); |
c2a0f1cb | 451 | } |
33742334 ILT |
452 | |
453 | ++*pgarbage; | |
454 | if (*pgarbage > mips_syn_garbage) | |
4fb192be | 455 | mips_error ("Remote debugging protocol failure"); |
33742334 ILT |
456 | } |
457 | } | |
458 | ||
459 | /* Get the packet header following the SYN. */ | |
460 | for (i = 1; i < HDR_LENGTH; i++) | |
461 | { | |
462 | ch = mips_readchar (timeout); | |
9a9a88c1 | 463 | if (ch == SERIAL_TIMEOUT) |
33742334 ILT |
464 | return -1; |
465 | ||
466 | /* Make sure this is a header byte. */ | |
467 | if (ch == SYN || ! HDR_CHECK (ch)) | |
468 | break; | |
469 | ||
470 | hdr[i] = ch; | |
471 | } | |
472 | ||
473 | /* If we got the complete header, we can return. Otherwise we | |
474 | loop around and keep looking for SYN. */ | |
475 | if (i >= HDR_LENGTH) | |
476 | return 0; | |
477 | } | |
478 | } | |
479 | ||
480 | /* Get a packet header, putting the data in the supplied buffer. | |
481 | PGARBAGE is a pointer to the number of garbage characters received | |
482 | so far. The last character read is returned in *PCH. Returns 0 | |
483 | for success, -1 for timeout, -2 for error. */ | |
484 | ||
485 | static int | |
486 | mips_receive_trailer (trlr, pgarbage, pch, timeout) | |
487 | unsigned char *trlr; | |
488 | int *pgarbage; | |
489 | int *pch; | |
490 | int timeout; | |
491 | { | |
492 | int i; | |
493 | int ch; | |
494 | ||
495 | for (i = 0; i < TRLR_LENGTH; i++) | |
496 | { | |
497 | ch = mips_readchar (timeout); | |
498 | *pch = ch; | |
9a9a88c1 | 499 | if (ch == SERIAL_TIMEOUT) |
33742334 ILT |
500 | return -1; |
501 | if (! TRLR_CHECK (ch)) | |
502 | return -2; | |
503 | trlr[i] = ch; | |
504 | } | |
505 | return 0; | |
506 | } | |
507 | ||
508 | /* Get the checksum of a packet. HDR points to the packet header. | |
509 | DATA points to the packet data. LEN is the length of DATA. */ | |
510 | ||
511 | static int | |
512 | mips_cksum (hdr, data, len) | |
513 | const unsigned char *hdr; | |
514 | const unsigned char *data; | |
515 | int len; | |
516 | { | |
517 | register const unsigned char *p; | |
518 | register int c; | |
519 | register int cksum; | |
520 | ||
521 | cksum = 0; | |
522 | ||
523 | /* The initial SYN is not included in the checksum. */ | |
524 | c = HDR_LENGTH - 1; | |
525 | p = hdr + 1; | |
526 | while (c-- != 0) | |
527 | cksum += *p++; | |
528 | ||
529 | c = len; | |
530 | p = data; | |
531 | while (c-- != 0) | |
532 | cksum += *p++; | |
533 | ||
534 | return cksum; | |
535 | } | |
536 | ||
537 | /* Send a packet containing the given ASCII string. */ | |
538 | ||
539 | static void | |
c2a0f1cb | 540 | mips_send_packet (s, get_ack) |
33742334 | 541 | const char *s; |
c2a0f1cb | 542 | int get_ack; |
33742334 ILT |
543 | { |
544 | unsigned int len; | |
545 | unsigned char *packet; | |
546 | register int cksum; | |
547 | int try; | |
548 | ||
549 | len = strlen (s); | |
550 | if (len > DATA_MAXLEN) | |
4fb192be | 551 | mips_error ("MIPS protocol data packet too long: %s", s); |
33742334 ILT |
552 | |
553 | packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1); | |
554 | ||
555 | packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq); | |
556 | packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq); | |
557 | packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq); | |
558 | packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq); | |
559 | ||
560 | memcpy (packet + HDR_LENGTH, s, len); | |
561 | ||
562 | cksum = mips_cksum (packet, packet + HDR_LENGTH, len); | |
563 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
564 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
565 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
566 | ||
567 | /* Increment the sequence number. This will set mips_send_seq to | |
568 | the sequence number we expect in the acknowledgement. */ | |
569 | mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS; | |
570 | ||
c2a0f1cb ILT |
571 | if (! get_ack) |
572 | return; | |
573 | ||
33742334 ILT |
574 | /* We can only have one outstanding data packet, so we just wait for |
575 | the acknowledgement here. Keep retransmitting the packet until | |
576 | we get one, or until we've tried too many times. */ | |
577 | for (try = 0; try < mips_send_retries; try++) | |
578 | { | |
579 | int garbage; | |
580 | int ch; | |
581 | ||
66a48870 | 582 | if (sr_get_debug () > 0) |
33742334 | 583 | { |
47d52968 JK |
584 | /* Don't use _filtered; we can't deal with a QUIT out of |
585 | target_wait, and I think this might be called from there. */ | |
33742334 | 586 | packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0'; |
47d52968 | 587 | printf_unfiltered ("Writing \"%s\"\n", packet + 1); |
33742334 ILT |
588 | } |
589 | ||
9a9a88c1 ILT |
590 | if (SERIAL_WRITE (mips_desc, packet, |
591 | HDR_LENGTH + len + TRLR_LENGTH) != 0) | |
4fb192be | 592 | mips_error ("write to target failed: %s", safe_strerror (errno)); |
33742334 ILT |
593 | |
594 | garbage = 0; | |
595 | ch = 0; | |
596 | while (1) | |
597 | { | |
598 | unsigned char hdr[HDR_LENGTH + 1]; | |
599 | unsigned char trlr[TRLR_LENGTH + 1]; | |
600 | int err; | |
601 | int seq; | |
602 | ||
603 | /* Get the packet header. If we time out, resend the data | |
604 | packet. */ | |
605 | err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait); | |
606 | if (err != 0) | |
607 | break; | |
608 | ||
609 | ch = 0; | |
610 | ||
611 | /* If we get a data packet, assume it is a duplicate and | |
612 | ignore it. FIXME: If the acknowledgement is lost, this | |
613 | data packet may be the packet the remote sends after the | |
614 | acknowledgement. */ | |
615 | if (HDR_IS_DATA (hdr)) | |
616 | continue; | |
617 | ||
618 | /* If the length is not 0, this is a garbled packet. */ | |
619 | if (HDR_GET_LEN (hdr) != 0) | |
620 | continue; | |
621 | ||
622 | /* Get the packet trailer. */ | |
623 | err = mips_receive_trailer (trlr, &garbage, &ch, | |
624 | mips_retransmit_wait); | |
625 | ||
626 | /* If we timed out, resend the data packet. */ | |
627 | if (err == -1) | |
628 | break; | |
629 | ||
630 | /* If we got a bad character, reread the header. */ | |
631 | if (err != 0) | |
632 | continue; | |
633 | ||
634 | /* If the checksum does not match the trailer checksum, this | |
635 | is a bad packet; ignore it. */ | |
636 | if (mips_cksum (hdr, (unsigned char *) NULL, 0) | |
637 | != TRLR_GET_CKSUM (trlr)) | |
638 | continue; | |
639 | ||
66a48870 | 640 | if (sr_get_debug () > 0) |
33742334 ILT |
641 | { |
642 | hdr[HDR_LENGTH] = '\0'; | |
643 | trlr[TRLR_LENGTH] = '\0'; | |
47d52968 JK |
644 | /* Don't use _filtered; we can't deal with a QUIT out of |
645 | target_wait, and I think this might be called from there. */ | |
646 | printf_unfiltered ("Got ack %d \"%s%s\"\n", | |
f63f30e2 | 647 | HDR_GET_SEQ (hdr), hdr + 1, trlr); |
33742334 ILT |
648 | } |
649 | ||
650 | /* If this ack is for the current packet, we're done. */ | |
651 | seq = HDR_GET_SEQ (hdr); | |
652 | if (seq == mips_send_seq) | |
653 | return; | |
654 | ||
655 | /* If this ack is for the last packet, resend the current | |
656 | packet. */ | |
657 | if ((seq + 1) % SEQ_MODULOS == mips_send_seq) | |
658 | break; | |
659 | ||
660 | /* Otherwise this is a bad ack; ignore it. Increment the | |
661 | garbage count to ensure that we do not stay in this loop | |
662 | forever. */ | |
663 | ++garbage; | |
664 | } | |
665 | } | |
666 | ||
4fb192be | 667 | mips_error ("Remote did not acknowledge packet"); |
33742334 ILT |
668 | } |
669 | ||
670 | /* Receive and acknowledge a packet, returning the data in BUFF (which | |
671 | should be DATA_MAXLEN + 1 bytes). The protocol documentation | |
672 | implies that only the sender retransmits packets, so this code just | |
673 | waits silently for a packet. It returns the length of the received | |
96e5f161 JK |
674 | packet. If THROW_ERROR is nonzero, call error() on errors. If not, |
675 | don't print an error message and return -1. */ | |
33742334 ILT |
676 | |
677 | static int | |
4c6071f7 | 678 | mips_receive_packet (buff, throw_error, timeout) |
33742334 | 679 | char *buff; |
96e5f161 | 680 | int throw_error; |
4c6071f7 | 681 | int timeout; |
33742334 ILT |
682 | { |
683 | int ch; | |
684 | int garbage; | |
685 | int len; | |
686 | unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1]; | |
687 | int cksum; | |
688 | ||
689 | ch = 0; | |
690 | garbage = 0; | |
691 | while (1) | |
692 | { | |
693 | unsigned char hdr[HDR_LENGTH]; | |
694 | unsigned char trlr[TRLR_LENGTH]; | |
695 | int i; | |
696 | int err; | |
697 | ||
4c6071f7 | 698 | if (mips_receive_header (hdr, &garbage, ch, timeout) != 0) |
96e5f161 JK |
699 | { |
700 | if (throw_error) | |
701 | mips_error ("Timed out waiting for remote packet"); | |
702 | else | |
703 | return -1; | |
704 | } | |
33742334 ILT |
705 | |
706 | ch = 0; | |
707 | ||
708 | /* An acknowledgement is probably a duplicate; ignore it. */ | |
709 | if (! HDR_IS_DATA (hdr)) | |
710 | { | |
47d52968 JK |
711 | /* Don't use _filtered; we can't deal with a QUIT out of |
712 | target_wait, and I think this might be called from there. */ | |
66a48870 | 713 | if (sr_get_debug () > 0) |
47d52968 | 714 | printf_unfiltered ("Ignoring unexpected ACK\n"); |
33742334 ILT |
715 | continue; |
716 | } | |
717 | ||
718 | /* If this is the wrong sequence number, ignore it. */ | |
719 | if (HDR_GET_SEQ (hdr) != mips_receive_seq) | |
720 | { | |
47d52968 JK |
721 | /* Don't use _filtered; we can't deal with a QUIT out of |
722 | target_wait, and I think this might be called from there. */ | |
66a48870 | 723 | if (sr_get_debug () > 0) |
47d52968 | 724 | printf_unfiltered ("Ignoring sequence number %d (want %d)\n", |
33742334 ILT |
725 | HDR_GET_SEQ (hdr), mips_receive_seq); |
726 | continue; | |
727 | } | |
728 | ||
729 | len = HDR_GET_LEN (hdr); | |
730 | ||
731 | for (i = 0; i < len; i++) | |
732 | { | |
733 | int rch; | |
734 | ||
4c6071f7 | 735 | rch = mips_readchar (timeout); |
33742334 ILT |
736 | if (rch == SYN) |
737 | { | |
738 | ch = SYN; | |
739 | break; | |
740 | } | |
9a9a88c1 | 741 | if (rch == SERIAL_TIMEOUT) |
96e5f161 JK |
742 | { |
743 | if (throw_error) | |
744 | mips_error ("Timed out waiting for remote packet"); | |
745 | else | |
746 | return -1; | |
747 | } | |
33742334 ILT |
748 | buff[i] = rch; |
749 | } | |
750 | ||
751 | if (i < len) | |
752 | { | |
47d52968 JK |
753 | /* Don't use _filtered; we can't deal with a QUIT out of |
754 | target_wait, and I think this might be called from there. */ | |
66a48870 | 755 | if (sr_get_debug () > 0) |
47d52968 | 756 | printf_unfiltered ("Got new SYN after %d chars (wanted %d)\n", |
33742334 ILT |
757 | i, len); |
758 | continue; | |
759 | } | |
760 | ||
4c6071f7 | 761 | err = mips_receive_trailer (trlr, &garbage, &ch, timeout); |
33742334 | 762 | if (err == -1) |
96e5f161 JK |
763 | { |
764 | if (throw_error) | |
765 | mips_error ("Timed out waiting for packet"); | |
766 | else | |
767 | return -1; | |
768 | } | |
33742334 ILT |
769 | if (err == -2) |
770 | { | |
47d52968 JK |
771 | /* Don't use _filtered; we can't deal with a QUIT out of |
772 | target_wait, and I think this might be called from there. */ | |
66a48870 | 773 | if (sr_get_debug () > 0) |
47d52968 | 774 | printf_unfiltered ("Got SYN when wanted trailer\n"); |
33742334 ILT |
775 | continue; |
776 | } | |
777 | ||
778 | if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr)) | |
779 | break; | |
780 | ||
66a48870 | 781 | if (sr_get_debug () > 0) |
47d52968 JK |
782 | /* Don't use _filtered; we can't deal with a QUIT out of |
783 | target_wait, and I think this might be called from there. */ | |
784 | printf_unfiltered ("Bad checksum; data %d, trailer %d\n", | |
33742334 ILT |
785 | mips_cksum (hdr, buff, len), |
786 | TRLR_GET_CKSUM (trlr)); | |
787 | ||
788 | /* The checksum failed. Send an acknowledgement for the | |
789 | previous packet to tell the remote to resend the packet. */ | |
790 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); | |
791 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
792 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
793 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
794 | ||
795 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
796 | ||
797 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
798 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
799 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
800 | ||
66a48870 | 801 | if (sr_get_debug () > 0) |
33742334 ILT |
802 | { |
803 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
47d52968 JK |
804 | /* Don't use _filtered; we can't deal with a QUIT out of |
805 | target_wait, and I think this might be called from there. */ | |
806 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, | |
33742334 ILT |
807 | ack + 1); |
808 | } | |
809 | ||
9a9a88c1 | 810 | if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
96e5f161 JK |
811 | { |
812 | if (throw_error) | |
813 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
814 | else | |
815 | return -1; | |
816 | } | |
33742334 ILT |
817 | } |
818 | ||
66a48870 | 819 | if (sr_get_debug () > 0) |
33742334 ILT |
820 | { |
821 | buff[len] = '\0'; | |
47d52968 JK |
822 | /* Don't use _filtered; we can't deal with a QUIT out of |
823 | target_wait, and I think this might be called from there. */ | |
824 | printf_unfiltered ("Got packet \"%s\"\n", buff); | |
33742334 ILT |
825 | } |
826 | ||
827 | /* We got the packet. Send an acknowledgement. */ | |
828 | mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS; | |
829 | ||
830 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); | |
831 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
832 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
833 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
834 | ||
835 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
836 | ||
837 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
838 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
839 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
840 | ||
66a48870 | 841 | if (sr_get_debug () > 0) |
33742334 ILT |
842 | { |
843 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
47d52968 JK |
844 | /* Don't use _filtered; we can't deal with a QUIT out of |
845 | target_wait, and I think this might be called from there. */ | |
846 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, | |
33742334 ILT |
847 | ack + 1); |
848 | } | |
849 | ||
9a9a88c1 | 850 | if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
96e5f161 JK |
851 | { |
852 | if (throw_error) | |
853 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
854 | else | |
855 | return -1; | |
856 | } | |
33742334 ILT |
857 | |
858 | return len; | |
859 | } | |
860 | \f | |
861 | /* Optionally send a request to the remote system and optionally wait | |
862 | for the reply. This implements the remote debugging protocol, | |
863 | which is built on top of the packet protocol defined above. Each | |
864 | request has an ADDR argument and a DATA argument. The following | |
865 | requests are defined: | |
866 | ||
867 | \0 don't send a request; just wait for a reply | |
868 | i read word from instruction space at ADDR | |
869 | d read word from data space at ADDR | |
870 | I write DATA to instruction space at ADDR | |
871 | D write DATA to data space at ADDR | |
872 | r read register number ADDR | |
873 | R set register number ADDR to value DATA | |
874 | c continue execution (if ADDR != 1, set pc to ADDR) | |
875 | s single step (if ADDR != 1, set pc to ADDR) | |
876 | ||
877 | The read requests return the value requested. The write requests | |
878 | return the previous value in the changed location. The execution | |
879 | requests return a UNIX wait value (the approximate signal which | |
880 | caused execution to stop is in the upper eight bits). | |
881 | ||
882 | If PERR is not NULL, this function waits for a reply. If an error | |
883 | occurs, it sets *PERR to 1 and sets errno according to what the | |
884 | target board reports. */ | |
885 | ||
886 | static int | |
4c6071f7 | 887 | mips_request (cmd, addr, data, perr, timeout) |
33742334 ILT |
888 | char cmd; |
889 | unsigned int addr; | |
890 | unsigned int data; | |
891 | int *perr; | |
4c6071f7 | 892 | int timeout; |
33742334 ILT |
893 | { |
894 | char buff[DATA_MAXLEN + 1]; | |
895 | int len; | |
896 | int rpid; | |
897 | char rcmd; | |
898 | int rerrflg; | |
899 | int rresponse; | |
4887063b | 900 | |
33742334 ILT |
901 | if (cmd != '\0') |
902 | { | |
903 | if (mips_need_reply) | |
904 | fatal ("mips_request: Trying to send command before reply"); | |
905 | sprintf (buff, "0x0 %c 0x%x 0x%x", cmd, addr, data); | |
c2a0f1cb | 906 | mips_send_packet (buff, 1); |
33742334 ILT |
907 | mips_need_reply = 1; |
908 | } | |
909 | ||
910 | if (perr == (int *) NULL) | |
911 | return 0; | |
912 | ||
913 | if (! mips_need_reply) | |
914 | fatal ("mips_request: Trying to get reply before command"); | |
915 | ||
916 | mips_need_reply = 0; | |
917 | ||
4c6071f7 | 918 | len = mips_receive_packet (buff, 1, timeout); |
33742334 ILT |
919 | buff[len] = '\0'; |
920 | ||
921 | if (sscanf (buff, "0x%x %c 0x%x 0x%x", | |
922 | &rpid, &rcmd, &rerrflg, &rresponse) != 4 | |
33742334 | 923 | || (cmd != '\0' && rcmd != cmd)) |
4fb192be | 924 | mips_error ("Bad response from remote board"); |
33742334 ILT |
925 | |
926 | if (rerrflg != 0) | |
927 | { | |
928 | *perr = 1; | |
929 | ||
930 | /* FIXME: This will returns MIPS errno numbers, which may or may | |
931 | not be the same as errno values used on other systems. If | |
932 | they stick to common errno values, they will be the same, but | |
933 | if they don't, they must be translated. */ | |
934 | errno = rresponse; | |
935 | ||
936 | return 0; | |
937 | } | |
938 | ||
939 | *perr = 0; | |
940 | return rresponse; | |
941 | } | |
942 | ||
864df7e6 JK |
943 | static void |
944 | mips_initialize_cleanups (arg) | |
945 | PTR arg; | |
946 | { | |
947 | mips_initializing = 0; | |
948 | } | |
949 | ||
c2a0f1cb ILT |
950 | /* Initialize a new connection to the MIPS board, and make sure we are |
951 | really connected. */ | |
952 | ||
953 | static void | |
954 | mips_initialize () | |
955 | { | |
956 | char cr; | |
c2a0f1cb ILT |
957 | char buff[DATA_MAXLEN + 1]; |
958 | int err; | |
864df7e6 | 959 | struct cleanup *old_cleanups = make_cleanup (mips_initialize_cleanups, NULL); |
c2a0f1cb | 960 | |
864df7e6 JK |
961 | /* What is this code doing here? I don't see any way it can happen, and |
962 | it might mean mips_initializing didn't get cleared properly. | |
963 | So I'll make it a warning. */ | |
c2a0f1cb | 964 | if (mips_initializing) |
864df7e6 JK |
965 | { |
966 | warning ("internal error: mips_initialize called twice"); | |
967 | return; | |
968 | } | |
c2a0f1cb ILT |
969 | |
970 | mips_initializing = 1; | |
971 | ||
972 | mips_send_seq = 0; | |
973 | mips_receive_seq = 0; | |
974 | ||
975 | /* The board seems to want to send us a packet. I don't know what | |
976 | it means. The packet seems to be triggered by a carriage return | |
977 | character, although perhaps any character would do. */ | |
7d13174e SS |
978 | cr = '\015'; |
979 | /* FIXME check the result from this */ | |
9a9a88c1 | 980 | SERIAL_WRITE (mips_desc, &cr, 1); |
c2a0f1cb | 981 | |
4c6071f7 | 982 | if (mips_receive_packet (buff, 0, 3) < 0) |
c2a0f1cb ILT |
983 | { |
984 | char cc; | |
985 | ||
c2a0f1cb ILT |
986 | /* We did not receive the packet we expected; try resetting the |
987 | board and trying again. */ | |
988 | printf_filtered ("Failed to initialize; trying to reset board\n"); | |
989 | cc = '\003'; | |
1724c671 | 990 | SERIAL_WRITE (mips_desc, &cc, 1); |
c2a0f1cb | 991 | sleep (2); |
7d13174e | 992 | SERIAL_WRITE (mips_desc, "\015db tty0\015", sizeof "\015db tty0\015" - 1); |
c2a0f1cb | 993 | sleep (1); |
7d13174e | 994 | cr = '\015'; |
1724c671 | 995 | SERIAL_WRITE (mips_desc, &cr, 1); |
c2a0f1cb | 996 | } |
4c6071f7 | 997 | mips_receive_packet (buff, 1, 3); |
c2a0f1cb | 998 | |
864df7e6 | 999 | do_cleanups (old_cleanups); |
c2a0f1cb ILT |
1000 | |
1001 | /* If this doesn't call error, we have connected; we don't care if | |
1002 | the request itself succeeds or fails. */ | |
4c6071f7 JK |
1003 | mips_request ('r', (unsigned int) 0, (unsigned int) 0, &err, |
1004 | mips_receive_wait); | |
c2a0f1cb ILT |
1005 | } |
1006 | ||
33742334 ILT |
1007 | /* Open a connection to the remote board. */ |
1008 | ||
1009 | static void | |
1010 | mips_open (name, from_tty) | |
1011 | char *name; | |
1012 | int from_tty; | |
1013 | { | |
ae55bdbc SS |
1014 | char *ptype; |
1015 | ||
33742334 ILT |
1016 | if (name == 0) |
1017 | error ( | |
1018 | "To open a MIPS remote debugging connection, you need to specify what serial\n\ | |
1019 | device is attached to the target board (e.g., /dev/ttya)."); | |
1020 | ||
1021 | target_preopen (from_tty); | |
1022 | ||
1023 | if (mips_is_open) | |
c2a0f1cb | 1024 | unpush_target (&mips_ops); |
33742334 | 1025 | |
1724c671 | 1026 | mips_desc = SERIAL_OPEN (name); |
9a9a88c1 | 1027 | if (mips_desc == (serial_t) NULL) |
33742334 ILT |
1028 | perror_with_name (name); |
1029 | ||
d48d9a28 KH |
1030 | if (baud_rate != -1) |
1031 | { | |
1032 | if (SERIAL_SETBAUDRATE (mips_desc, baud_rate)) | |
1033 | { | |
1034 | SERIAL_CLOSE (mips_desc); | |
1035 | perror_with_name (name); | |
1036 | } | |
1037 | } | |
1038 | ||
1724c671 SG |
1039 | SERIAL_RAW (mips_desc); |
1040 | ||
33742334 ILT |
1041 | mips_is_open = 1; |
1042 | ||
c2a0f1cb | 1043 | mips_initialize (); |
33742334 ILT |
1044 | |
1045 | if (from_tty) | |
199b2450 | 1046 | printf_unfiltered ("Remote MIPS debugging using %s\n", name); |
ae55bdbc SS |
1047 | |
1048 | /* Switch to using remote target now. */ | |
1049 | push_target (&mips_ops); | |
33742334 | 1050 | |
c2a0f1cb | 1051 | /* FIXME: Should we call start_remote here? */ |
ae55bdbc SS |
1052 | |
1053 | /* Try to figure out the processor model if possible. */ | |
1054 | ptype = mips_read_processor_type (); | |
1055 | if (ptype) | |
1056 | mips_set_processor_type_command (strsave (ptype), 0); | |
4887063b SG |
1057 | |
1058 | /* This is really the job of start_remote however, that makes an assumption | |
1059 | that the target is about to print out a status message of some sort. That | |
1060 | doesn't happen here (in fact, it may not be possible to get the monitor to | |
1061 | send the appropriate packet). */ | |
1062 | ||
1063 | flush_cached_frames (); | |
1064 | registers_changed (); | |
1065 | stop_pc = read_pc (); | |
1066 | set_current_frame (create_new_frame (read_fp (), stop_pc)); | |
1067 | select_frame (get_current_frame (), 0); | |
1068 | print_stack_frame (selected_frame, -1, 1); | |
33742334 ILT |
1069 | } |
1070 | ||
1071 | /* Close a connection to the remote board. */ | |
1072 | ||
1073 | static void | |
1074 | mips_close (quitting) | |
1075 | int quitting; | |
1076 | { | |
1077 | if (mips_is_open) | |
1078 | { | |
c2a0f1cb ILT |
1079 | int err; |
1080 | ||
1081 | mips_is_open = 0; | |
1082 | ||
33742334 | 1083 | /* Get the board out of remote debugging mode. */ |
4c6071f7 JK |
1084 | mips_request ('x', (unsigned int) 0, (unsigned int) 0, &err, |
1085 | mips_receive_wait); | |
c2a0f1cb | 1086 | |
1724c671 | 1087 | SERIAL_CLOSE (mips_desc); |
33742334 ILT |
1088 | } |
1089 | } | |
1090 | ||
1091 | /* Detach from the remote board. */ | |
1092 | ||
1093 | static void | |
1094 | mips_detach (args, from_tty) | |
1095 | char *args; | |
1096 | int from_tty; | |
1097 | { | |
1098 | if (args) | |
1099 | error ("Argument given to \"detach\" when remotely debugging."); | |
1100 | ||
1101 | pop_target (); | |
1102 | if (from_tty) | |
199b2450 | 1103 | printf_unfiltered ("Ending remote MIPS debugging.\n"); |
33742334 ILT |
1104 | } |
1105 | ||
1106 | /* Tell the target board to resume. This does not wait for a reply | |
1107 | from the board. */ | |
1108 | ||
1109 | static void | |
25286543 | 1110 | mips_resume (pid, step, siggnal) |
67ac9759 JK |
1111 | int pid, step; |
1112 | enum target_signal siggnal; | |
33742334 | 1113 | { |
67ac9759 JK |
1114 | if (siggnal != TARGET_SIGNAL_0) |
1115 | warning | |
1116 | ("Can't send signals to a remote system. Try `handle %s ignore'.", | |
1117 | target_signal_to_name (siggnal)); | |
33742334 ILT |
1118 | |
1119 | mips_request (step ? 's' : 'c', | |
c2a0f1cb | 1120 | (unsigned int) 1, |
33742334 | 1121 | (unsigned int) 0, |
4c6071f7 JK |
1122 | (int *) NULL, |
1123 | mips_receive_wait); | |
33742334 ILT |
1124 | } |
1125 | ||
f3fe8934 JK |
1126 | /* Return the signal corresponding to SIG, where SIG is the number which |
1127 | the MIPS protocol uses for the signal. */ | |
1128 | enum target_signal | |
1129 | mips_signal_from_protocol (sig) | |
1130 | int sig; | |
1131 | { | |
1132 | /* We allow a few more signals than the IDT board actually returns, on | |
1133 | the theory that there is at least *some* hope that perhaps the numbering | |
1134 | for these signals is widely agreed upon. */ | |
1135 | if (sig <= 0 | |
1136 | || sig > 31) | |
1137 | return TARGET_SIGNAL_UNKNOWN; | |
1138 | ||
1139 | /* Don't want to use target_signal_from_host because we are converting | |
1140 | from MIPS signal numbers, not host ones. Our internal numbers | |
1141 | match the MIPS numbers for the signals the board can return, which | |
1142 | are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */ | |
1143 | return (enum target_signal) sig; | |
1144 | } | |
1145 | ||
33742334 ILT |
1146 | /* Wait until the remote stops, and return a wait status. */ |
1147 | ||
1148 | static int | |
f7fa951f DZ |
1149 | mips_wait (pid, status) |
1150 | int pid; | |
67ac9759 | 1151 | struct target_waitstatus *status; |
33742334 ILT |
1152 | { |
1153 | int rstatus; | |
1154 | int err; | |
1155 | ||
1156 | /* If we have not sent a single step or continue command, then the | |
1157 | board is waiting for us to do something. Return a status | |
1158 | indicating that it is stopped. */ | |
1159 | if (! mips_need_reply) | |
1160 | { | |
67ac9759 JK |
1161 | status->kind = TARGET_WAITKIND_STOPPED; |
1162 | status->value.sig = TARGET_SIGNAL_TRAP; | |
33742334 ILT |
1163 | return 0; |
1164 | } | |
1165 | ||
4c6071f7 JK |
1166 | /* No timeout; we sit here as long as the program continues to execute. */ |
1167 | rstatus = mips_request ('\0', (unsigned int) 0, (unsigned int) 0, &err, -1); | |
33742334 | 1168 | if (err) |
4fb192be | 1169 | mips_error ("Remote failure: %s", safe_strerror (errno)); |
33742334 | 1170 | |
67ac9759 JK |
1171 | /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG |
1172 | and so on, because the constants we want here are determined by the | |
1173 | MIPS protocol and have nothing to do with what host we are running on. */ | |
6397809b | 1174 | if ((rstatus & 0377) == 0) |
67ac9759 JK |
1175 | { |
1176 | status->kind = TARGET_WAITKIND_EXITED; | |
1177 | status->value.integer = (((rstatus) >> 8) & 0377); | |
1178 | } | |
6397809b | 1179 | else if ((rstatus & 0377) == 0177) |
67ac9759 | 1180 | { |
5efb3899 | 1181 | status->kind = TARGET_WAITKIND_STOPPED; |
f3fe8934 | 1182 | status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0377); |
67ac9759 JK |
1183 | } |
1184 | else | |
1185 | { | |
1186 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
f3fe8934 | 1187 | status->value.sig = mips_signal_from_protocol (rstatus & 0177); |
67ac9759 | 1188 | } |
33742334 ILT |
1189 | |
1190 | return 0; | |
1191 | } | |
1192 | ||
1193 | /* We have to map between the register numbers used by gdb and the | |
1194 | register numbers used by the debugging protocol. This function | |
1195 | assumes that we are using tm-mips.h. */ | |
1196 | ||
1197 | #define REGNO_OFFSET 96 | |
1198 | ||
1199 | static int | |
1200 | mips_map_regno (regno) | |
1201 | int regno; | |
1202 | { | |
1203 | if (regno < 32) | |
1204 | return regno; | |
1205 | if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32) | |
1206 | return regno - FP0_REGNUM + 32; | |
1207 | switch (regno) | |
1208 | { | |
1209 | case PC_REGNUM: | |
1210 | return REGNO_OFFSET + 0; | |
1211 | case CAUSE_REGNUM: | |
1212 | return REGNO_OFFSET + 1; | |
1213 | case HI_REGNUM: | |
1214 | return REGNO_OFFSET + 2; | |
1215 | case LO_REGNUM: | |
1216 | return REGNO_OFFSET + 3; | |
1217 | case FCRCS_REGNUM: | |
1218 | return REGNO_OFFSET + 4; | |
1219 | case FCRIR_REGNUM: | |
1220 | return REGNO_OFFSET + 5; | |
1221 | default: | |
1222 | /* FIXME: Is there a way to get the status register? */ | |
1223 | return 0; | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | /* Fetch the remote registers. */ | |
1228 | ||
1229 | static void | |
1230 | mips_fetch_registers (regno) | |
1231 | int regno; | |
1232 | { | |
f4f0d174 | 1233 | unsigned LONGEST val; |
33742334 ILT |
1234 | int err; |
1235 | ||
1236 | if (regno == -1) | |
1237 | { | |
1238 | for (regno = 0; regno < NUM_REGS; regno++) | |
1239 | mips_fetch_registers (regno); | |
1240 | return; | |
1241 | } | |
1242 | ||
021b10e3 JK |
1243 | if (regno == FP_REGNUM || regno == ZERO_REGNUM) |
1244 | /* FP_REGNUM on the mips is a hack which is just supposed to read | |
1245 | zero (see also mips-nat.c). */ | |
1246 | val = 0; | |
1247 | else | |
1248 | { | |
1249 | val = mips_request ('r', (unsigned int) mips_map_regno (regno), | |
1250 | (unsigned int) 0, &err, mips_receive_wait); | |
1251 | if (err) | |
1252 | mips_error ("Can't read register %d: %s", regno, | |
1253 | safe_strerror (errno)); | |
1254 | } | |
33742334 | 1255 | |
34df79fc JK |
1256 | { |
1257 | char buf[MAX_REGISTER_RAW_SIZE]; | |
1258 | ||
1259 | /* We got the number the register holds, but gdb expects to see a | |
1260 | value in the target byte ordering. */ | |
1261 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (regno), val); | |
1262 | supply_register (regno, buf); | |
1263 | } | |
33742334 ILT |
1264 | } |
1265 | ||
1266 | /* Prepare to store registers. The MIPS protocol can store individual | |
1267 | registers, so this function doesn't have to do anything. */ | |
1268 | ||
1269 | static void | |
1270 | mips_prepare_to_store () | |
1271 | { | |
1272 | } | |
1273 | ||
1274 | /* Store remote register(s). */ | |
1275 | ||
1276 | static void | |
1277 | mips_store_registers (regno) | |
1278 | int regno; | |
1279 | { | |
1280 | int err; | |
1281 | ||
1282 | if (regno == -1) | |
1283 | { | |
1284 | for (regno = 0; regno < NUM_REGS; regno++) | |
1285 | mips_store_registers (regno); | |
1286 | return; | |
1287 | } | |
1288 | ||
1289 | mips_request ('R', (unsigned int) mips_map_regno (regno), | |
1290 | (unsigned int) read_register (regno), | |
4c6071f7 | 1291 | &err, mips_receive_wait); |
33742334 | 1292 | if (err) |
4fb192be | 1293 | mips_error ("Can't write register %d: %s", regno, safe_strerror (errno)); |
33742334 ILT |
1294 | } |
1295 | ||
1296 | /* Fetch a word from the target board. */ | |
1297 | ||
1298 | static int | |
1299 | mips_fetch_word (addr) | |
1300 | CORE_ADDR addr; | |
1301 | { | |
1302 | int val; | |
1303 | int err; | |
1304 | ||
4c6071f7 JK |
1305 | val = mips_request ('d', (unsigned int) addr, (unsigned int) 0, &err, |
1306 | mips_receive_wait); | |
33742334 ILT |
1307 | if (err) |
1308 | { | |
1309 | /* Data space failed; try instruction space. */ | |
4c6071f7 JK |
1310 | val = mips_request ('i', (unsigned int) addr, (unsigned int) 0, &err, |
1311 | mips_receive_wait); | |
33742334 | 1312 | if (err) |
4fb192be | 1313 | mips_error ("Can't read address 0x%x: %s", addr, safe_strerror (errno)); |
33742334 ILT |
1314 | } |
1315 | return val; | |
1316 | } | |
1317 | ||
aa56c716 JK |
1318 | /* Store a word to the target board. Returns errno code or zero for |
1319 | success. If OLD_CONTENTS is non-NULL, put the old contents of that | |
1320 | memory location there. */ | |
33742334 | 1321 | |
aa56c716 JK |
1322 | static int |
1323 | mips_store_word (addr, val, old_contents) | |
33742334 ILT |
1324 | CORE_ADDR addr; |
1325 | int val; | |
aa56c716 | 1326 | char *old_contents; |
33742334 ILT |
1327 | { |
1328 | int err; | |
aa56c716 | 1329 | unsigned int oldcontents; |
33742334 | 1330 | |
aa56c716 JK |
1331 | oldcontents = mips_request ('D', (unsigned int) addr, (unsigned int) val, |
1332 | &err, | |
1333 | mips_receive_wait); | |
33742334 ILT |
1334 | if (err) |
1335 | { | |
1336 | /* Data space failed; try instruction space. */ | |
aa56c716 JK |
1337 | oldcontents = mips_request ('I', (unsigned int) addr, |
1338 | (unsigned int) val, &err, | |
1339 | mips_receive_wait); | |
33742334 | 1340 | if (err) |
aa56c716 | 1341 | return errno; |
33742334 | 1342 | } |
aa56c716 JK |
1343 | if (old_contents != NULL) |
1344 | store_unsigned_integer (old_contents, 4, oldcontents); | |
1345 | return 0; | |
33742334 ILT |
1346 | } |
1347 | ||
1348 | /* Read or write LEN bytes from inferior memory at MEMADDR, | |
1349 | transferring to or from debugger address MYADDR. Write to inferior | |
1350 | if SHOULD_WRITE is nonzero. Returns length of data written or | |
1351 | read; 0 for error. Note that protocol gives us the correct value | |
1352 | for a longword, since it transfers values in ASCII. We want the | |
1353 | byte values, so we have to swap the longword values. */ | |
1354 | ||
1355 | static int | |
1356 | mips_xfer_memory (memaddr, myaddr, len, write, ignore) | |
1357 | CORE_ADDR memaddr; | |
1358 | char *myaddr; | |
1359 | int len; | |
1360 | int write; | |
1361 | struct target_ops *ignore; | |
1362 | { | |
1363 | register int i; | |
1364 | /* Round starting address down to longword boundary. */ | |
1365 | register CORE_ADDR addr = memaddr &~ 3; | |
1366 | /* Round ending address up; get number of longwords that makes. */ | |
1367 | register int count = (((memaddr + len) - addr) + 3) / 4; | |
1368 | /* Allocate buffer of that many longwords. */ | |
34df79fc | 1369 | register char *buffer = alloca (count * 4); |
33742334 | 1370 | |
aa56c716 JK |
1371 | int status; |
1372 | ||
33742334 ILT |
1373 | if (write) |
1374 | { | |
1375 | /* Fill start and end extra bytes of buffer with existing data. */ | |
1376 | if (addr != memaddr || len < 4) | |
1377 | { | |
1378 | /* Need part of initial word -- fetch it. */ | |
34df79fc | 1379 | store_unsigned_integer (&buffer[0], 4, mips_fetch_word (addr)); |
33742334 ILT |
1380 | } |
1381 | ||
34df79fc | 1382 | if (count > 1) |
33742334 | 1383 | { |
34df79fc JK |
1384 | /* Need part of last word -- fetch it. FIXME: we do this even |
1385 | if we don't need it. */ | |
1386 | store_unsigned_integer (&buffer[(count - 1) * 4], 4, | |
1387 | mips_fetch_word (addr + (count - 1) * 4)); | |
33742334 ILT |
1388 | } |
1389 | ||
1390 | /* Copy data to be written over corresponding part of buffer */ | |
1391 | ||
1392 | memcpy ((char *) buffer + (memaddr & 3), myaddr, len); | |
1393 | ||
1394 | /* Write the entire buffer. */ | |
1395 | ||
1396 | for (i = 0; i < count; i++, addr += 4) | |
1397 | { | |
aa56c716 JK |
1398 | status = mips_store_word (addr, |
1399 | extract_unsigned_integer (&buffer[i*4], 4), | |
1400 | NULL); | |
7d13174e SS |
1401 | /* Report each kilobyte (we download 32-bit words at a time) */ |
1402 | if (i % 256 == 255) | |
1403 | { | |
1404 | printf_unfiltered ("*"); | |
1405 | fflush (stdout); | |
1406 | } | |
aa56c716 JK |
1407 | if (status) |
1408 | { | |
1409 | errno = status; | |
1410 | return 0; | |
1411 | } | |
34df79fc | 1412 | /* FIXME: Do we want a QUIT here? */ |
33742334 | 1413 | } |
7d13174e SS |
1414 | if (count >= 256) |
1415 | printf_unfiltered ("\n"); | |
33742334 ILT |
1416 | } |
1417 | else | |
1418 | { | |
1419 | /* Read all the longwords */ | |
1420 | for (i = 0; i < count; i++, addr += 4) | |
1421 | { | |
34df79fc | 1422 | store_unsigned_integer (&buffer[i*4], 4, mips_fetch_word (addr)); |
33742334 ILT |
1423 | QUIT; |
1424 | } | |
1425 | ||
1426 | /* Copy appropriate bytes out of the buffer. */ | |
34df79fc | 1427 | memcpy (myaddr, buffer + (memaddr & 3), len); |
33742334 ILT |
1428 | } |
1429 | return len; | |
1430 | } | |
1431 | ||
1432 | /* Print info on this target. */ | |
1433 | ||
1434 | static void | |
1435 | mips_files_info (ignore) | |
1436 | struct target_ops *ignore; | |
1437 | { | |
199b2450 | 1438 | printf_unfiltered ("Debugging a MIPS board over a serial line.\n"); |
33742334 ILT |
1439 | } |
1440 | ||
c2a0f1cb ILT |
1441 | /* Kill the process running on the board. This will actually only |
1442 | work if we are doing remote debugging over the console input. I | |
1443 | think that if IDT/sim had the remote debug interrupt enabled on the | |
1444 | right port, we could interrupt the process with a break signal. */ | |
1445 | ||
1446 | static void | |
1447 | mips_kill () | |
1448 | { | |
1449 | #if 0 | |
1450 | if (mips_is_open) | |
1451 | { | |
1452 | char cc; | |
1453 | ||
1454 | /* Send a ^C. */ | |
1455 | cc = '\003'; | |
1724c671 | 1456 | SERIAL_WRITE (mips_desc, &cc, 1); |
c2a0f1cb ILT |
1457 | sleep (1); |
1458 | target_mourn_inferior (); | |
1459 | } | |
1460 | #endif | |
1461 | } | |
1462 | ||
33742334 ILT |
1463 | /* Start running on the target board. */ |
1464 | ||
1465 | static void | |
1466 | mips_create_inferior (execfile, args, env) | |
1467 | char *execfile; | |
1468 | char *args; | |
1469 | char **env; | |
1470 | { | |
1471 | CORE_ADDR entry_pt; | |
1472 | ||
33742334 | 1473 | if (args && *args) |
aa56c716 JK |
1474 | { |
1475 | warning ("\ | |
1476 | Can't pass arguments to remote MIPS board; arguments ignored."); | |
1477 | /* And don't try to use them on the next "run" command. */ | |
1478 | execute_command ("set args", 0); | |
1479 | } | |
33742334 ILT |
1480 | |
1481 | if (execfile == 0 || exec_bfd == 0) | |
aa56c716 | 1482 | error ("No executable file specified"); |
33742334 ILT |
1483 | |
1484 | entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd); | |
1485 | ||
1486 | init_wait_for_inferior (); | |
1487 | ||
c2a0f1cb ILT |
1488 | /* FIXME: Should we set inferior_pid here? */ |
1489 | ||
45dc9be3 | 1490 | proceed (entry_pt, TARGET_SIGNAL_DEFAULT, 0); |
33742334 ILT |
1491 | } |
1492 | ||
1493 | /* Clean up after a process. Actually nothing to do. */ | |
1494 | ||
1495 | static void | |
1496 | mips_mourn_inferior () | |
1497 | { | |
71607f9d | 1498 | unpush_target (&mips_ops); |
33742334 ILT |
1499 | generic_mourn_inferior (); |
1500 | } | |
1501 | \f | |
aa56c716 JK |
1502 | /* We can write a breakpoint and read the shadow contents in one |
1503 | operation. */ | |
1504 | ||
1505 | /* The IDT board uses an unusual breakpoint value, and sometimes gets | |
1506 | confused when it sees the usual MIPS breakpoint instruction. */ | |
1507 | ||
1a406ce8 ILT |
1508 | #define BREAK_INSN (0x00000a0d) |
1509 | #define BREAK_INSN_SIZE (4) | |
aa56c716 JK |
1510 | |
1511 | /* Insert a breakpoint on targets that don't have any better breakpoint | |
1512 | support. We read the contents of the target location and stash it, | |
1513 | then overwrite it with a breakpoint instruction. ADDR is the target | |
1514 | location in the target machine. CONTENTS_CACHE is a pointer to | |
1515 | memory allocated for saving the target contents. It is guaranteed | |
1516 | by the caller to be long enough to save sizeof BREAKPOINT bytes (this | |
1517 | is accomplished via BREAKPOINT_MAX). */ | |
1518 | ||
1519 | static int | |
1520 | mips_insert_breakpoint (addr, contents_cache) | |
1521 | CORE_ADDR addr; | |
1522 | char *contents_cache; | |
1523 | { | |
1524 | int status; | |
1525 | ||
1a406ce8 | 1526 | return mips_store_word (addr, BREAK_INSN, contents_cache); |
aa56c716 JK |
1527 | } |
1528 | ||
1529 | static int | |
1530 | mips_remove_breakpoint (addr, contents_cache) | |
1531 | CORE_ADDR addr; | |
1532 | char *contents_cache; | |
1533 | { | |
1a406ce8 | 1534 | return target_write_memory (addr, contents_cache, BREAK_INSN_SIZE); |
aa56c716 JK |
1535 | } |
1536 | \f | |
33742334 ILT |
1537 | /* The target vector. */ |
1538 | ||
1539 | struct target_ops mips_ops = | |
1540 | { | |
1541 | "mips", /* to_shortname */ | |
1542 | "Remote MIPS debugging over serial line", /* to_longname */ | |
796d1fd3 JK |
1543 | "\ |
1544 | Debug a board using the MIPS remote debugging protocol over a serial line.\n\ | |
1545 | The argument is the device it is connected to or, if it contains a colon,\n\ | |
1546 | HOST:PORT to access a board over a network", /* to_doc */ | |
33742334 ILT |
1547 | mips_open, /* to_open */ |
1548 | mips_close, /* to_close */ | |
1549 | NULL, /* to_attach */ | |
1550 | mips_detach, /* to_detach */ | |
1551 | mips_resume, /* to_resume */ | |
1552 | mips_wait, /* to_wait */ | |
1553 | mips_fetch_registers, /* to_fetch_registers */ | |
1554 | mips_store_registers, /* to_store_registers */ | |
1555 | mips_prepare_to_store, /* to_prepare_to_store */ | |
1556 | mips_xfer_memory, /* to_xfer_memory */ | |
1557 | mips_files_info, /* to_files_info */ | |
aa56c716 JK |
1558 | mips_insert_breakpoint, /* to_insert_breakpoint */ |
1559 | mips_remove_breakpoint, /* to_remove_breakpoint */ | |
33742334 ILT |
1560 | NULL, /* to_terminal_init */ |
1561 | NULL, /* to_terminal_inferior */ | |
1562 | NULL, /* to_terminal_ours_for_output */ | |
1563 | NULL, /* to_terminal_ours */ | |
1564 | NULL, /* to_terminal_info */ | |
c2a0f1cb | 1565 | mips_kill, /* to_kill */ |
6b27ebe8 | 1566 | generic_load, /* to_load */ |
33742334 ILT |
1567 | NULL, /* to_lookup_symbol */ |
1568 | mips_create_inferior, /* to_create_inferior */ | |
1569 | mips_mourn_inferior, /* to_mourn_inferior */ | |
1570 | NULL, /* to_can_run */ | |
1571 | NULL, /* to_notice_signals */ | |
43fc25c8 | 1572 | 0, /* to_thread_alive */ |
78b459a7 | 1573 | 0, /* to_stop */ |
33742334 ILT |
1574 | process_stratum, /* to_stratum */ |
1575 | NULL, /* to_next */ | |
1576 | 1, /* to_has_all_memory */ | |
1577 | 1, /* to_has_memory */ | |
1578 | 1, /* to_has_stack */ | |
1579 | 1, /* to_has_registers */ | |
1580 | 1, /* to_has_execution */ | |
1581 | NULL, /* sections */ | |
1582 | NULL, /* sections_end */ | |
1583 | OPS_MAGIC /* to_magic */ | |
1584 | }; | |
1585 | \f | |
1586 | void | |
1587 | _initialize_remote_mips () | |
1588 | { | |
1589 | add_target (&mips_ops); | |
1590 | ||
0907dc09 ILT |
1591 | add_show_from_set ( |
1592 | add_set_cmd ("timeout", no_class, var_zinteger, | |
1593 | (char *) &mips_receive_wait, | |
1594 | "Set timeout in seconds for remote MIPS serial I/O.", | |
1595 | &setlist), | |
1596 | &showlist); | |
1597 | ||
1598 | add_show_from_set ( | |
1599 | add_set_cmd ("retransmit-timeout", no_class, var_zinteger, | |
1600 | (char *) &mips_retransmit_wait, | |
1601 | "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\ | |
1602 | This is the number of seconds to wait for an acknowledgement to a packet\n\ | |
1603 | before resending the packet.", &setlist), | |
1604 | &showlist); | |
33742334 | 1605 | } |