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 | |
cd10c7e3 SG |
64 | static int mips_request PARAMS ((int cmd, unsigned int addr, |
65 | unsigned int data, int *perr, int timeout, | |
66 | char *buff)); | |
33742334 | 67 | |
ae55bdbc | 68 | static void mips_initialize PARAMS ((void)); |
c2a0f1cb | 69 | |
ae55bdbc | 70 | static void mips_open PARAMS ((char *name, int from_tty)); |
33742334 | 71 | |
ae55bdbc | 72 | static void mips_close PARAMS ((int quitting)); |
33742334 | 73 | |
ae55bdbc | 74 | static void mips_detach PARAMS ((char *args, int from_tty)); |
33742334 | 75 | |
67ac9759 JK |
76 | static void mips_resume PARAMS ((int pid, int step, |
77 | enum target_signal siggnal)); | |
33742334 | 78 | |
ae55bdbc | 79 | static int mips_wait PARAMS ((int pid, struct target_waitstatus *status)); |
33742334 | 80 | |
ae55bdbc | 81 | static int mips_map_regno PARAMS ((int regno)); |
33742334 | 82 | |
ae55bdbc | 83 | static void mips_fetch_registers PARAMS ((int regno)); |
33742334 | 84 | |
ae55bdbc | 85 | static void mips_prepare_to_store PARAMS ((void)); |
33742334 | 86 | |
ae55bdbc | 87 | static void mips_store_registers PARAMS ((int regno)); |
33742334 | 88 | |
ae55bdbc | 89 | static int mips_fetch_word PARAMS ((CORE_ADDR addr)); |
33742334 | 90 | |
ae55bdbc SS |
91 | static int mips_store_word PARAMS ((CORE_ADDR addr, int value, |
92 | char *old_contents)); | |
33742334 | 93 | |
ae55bdbc SS |
94 | static int mips_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, int len, |
95 | int write, struct target_ops *ignore)); | |
33742334 | 96 | |
ae55bdbc | 97 | static void mips_files_info PARAMS ((struct target_ops *ignore)); |
33742334 | 98 | |
ae55bdbc SS |
99 | static void mips_create_inferior PARAMS ((char *execfile, char *args, |
100 | char **env)); | |
33742334 | 101 | |
ae55bdbc | 102 | static void mips_mourn_inferior PARAMS ((void)); |
33742334 | 103 | |
4704fd9c SG |
104 | static void mips_load PARAMS ((char *file, int from_tty)); |
105 | ||
cd10c7e3 | 106 | static int mips_make_srec PARAMS ((char *buffer, int type, CORE_ADDR memaddr, |
4704fd9c SG |
107 | unsigned char *myaddr, int len)); |
108 | ||
cd10c7e3 SG |
109 | static int common_breakpoint PARAMS ((int cmd, CORE_ADDR addr, CORE_ADDR mask, |
110 | char *flags)); | |
33742334 ILT |
111 | /* A forward declaration. */ |
112 | extern struct target_ops mips_ops; | |
113 | \f | |
114 | /* The MIPS remote debugging interface is built on top of a simple | |
115 | packet protocol. Each packet is organized as follows: | |
116 | ||
117 | SYN The first character is always a SYN (ASCII 026, or ^V). SYN | |
118 | may not appear anywhere else in the packet. Any time a SYN is | |
119 | seen, a new packet should be assumed to have begun. | |
120 | ||
121 | TYPE_LEN | |
122 | This byte contains the upper five bits of the logical length | |
123 | of the data section, plus a single bit indicating whether this | |
124 | is a data packet or an acknowledgement. The documentation | |
125 | indicates that this bit is 1 for a data packet, but the actual | |
126 | board uses 1 for an acknowledgement. The value of the byte is | |
127 | 0x40 + (ack ? 0x20 : 0) + (len >> 6) | |
128 | (we always have 0 <= len < 1024). Acknowledgement packets do | |
129 | not carry data, and must have a data length of 0. | |
130 | ||
131 | LEN1 This byte contains the lower six bits of the logical length of | |
132 | the data section. The value is | |
133 | 0x40 + (len & 0x3f) | |
134 | ||
135 | SEQ This byte contains the six bit sequence number of the packet. | |
136 | The value is | |
137 | 0x40 + seq | |
138 | An acknowlegment packet contains the sequence number of the | |
4887063b | 139 | packet being acknowledged plus 1 modulo 64. Data packets are |
33742334 ILT |
140 | transmitted in sequence. There may only be one outstanding |
141 | unacknowledged data packet at a time. The sequence numbers | |
142 | are independent in each direction. If an acknowledgement for | |
143 | the previous packet is received (i.e., an acknowledgement with | |
144 | the sequence number of the packet just sent) the packet just | |
145 | sent should be retransmitted. If no acknowledgement is | |
146 | received within a timeout period, the packet should be | |
147 | retransmitted. This has an unfortunate failure condition on a | |
148 | high-latency line, as a delayed acknowledgement may lead to an | |
149 | endless series of duplicate packets. | |
150 | ||
151 | DATA The actual data bytes follow. The following characters are | |
152 | escaped inline with DLE (ASCII 020, or ^P): | |
153 | SYN (026) DLE S | |
154 | DLE (020) DLE D | |
155 | ^C (003) DLE C | |
156 | ^S (023) DLE s | |
157 | ^Q (021) DLE q | |
158 | The additional DLE characters are not counted in the logical | |
159 | length stored in the TYPE_LEN and LEN1 bytes. | |
160 | ||
161 | CSUM1 | |
162 | CSUM2 | |
163 | CSUM3 | |
164 | These bytes contain an 18 bit checksum of the complete | |
165 | contents of the packet excluding the SEQ byte and the | |
166 | CSUM[123] bytes. The checksum is simply the twos complement | |
167 | addition of all the bytes treated as unsigned characters. The | |
168 | values of the checksum bytes are: | |
169 | CSUM1: 0x40 + ((cksum >> 12) & 0x3f) | |
170 | CSUM2: 0x40 + ((cksum >> 6) & 0x3f) | |
171 | CSUM3: 0x40 + (cksum & 0x3f) | |
172 | ||
173 | It happens that the MIPS remote debugging protocol always | |
174 | communicates with ASCII strings. Because of this, this | |
175 | implementation doesn't bother to handle the DLE quoting mechanism, | |
176 | since it will never be required. */ | |
177 | ||
178 | /* The SYN character which starts each packet. */ | |
179 | #define SYN '\026' | |
180 | ||
181 | /* The 0x40 used to offset each packet (this value ensures that all of | |
182 | the header and trailer bytes, other than SYN, are printable ASCII | |
183 | characters). */ | |
184 | #define HDR_OFFSET 0x40 | |
185 | ||
186 | /* The indices of the bytes in the packet header. */ | |
187 | #define HDR_INDX_SYN 0 | |
188 | #define HDR_INDX_TYPE_LEN 1 | |
189 | #define HDR_INDX_LEN1 2 | |
190 | #define HDR_INDX_SEQ 3 | |
191 | #define HDR_LENGTH 4 | |
192 | ||
193 | /* The data/ack bit in the TYPE_LEN header byte. */ | |
194 | #define TYPE_LEN_DA_BIT 0x20 | |
195 | #define TYPE_LEN_DATA 0 | |
196 | #define TYPE_LEN_ACK TYPE_LEN_DA_BIT | |
197 | ||
198 | /* How to compute the header bytes. */ | |
199 | #define HDR_SET_SYN(data, len, seq) (SYN) | |
200 | #define HDR_SET_TYPE_LEN(data, len, seq) \ | |
201 | (HDR_OFFSET \ | |
202 | + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \ | |
203 | + (((len) >> 6) & 0x1f)) | |
204 | #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f)) | |
205 | #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq)) | |
206 | ||
207 | /* Check that a header byte is reasonable. */ | |
208 | #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET) | |
209 | ||
210 | /* Get data from the header. These macros evaluate their argument | |
211 | multiple times. */ | |
212 | #define HDR_IS_DATA(hdr) \ | |
213 | (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA) | |
214 | #define HDR_GET_LEN(hdr) \ | |
215 | ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f))) | |
216 | #define HDR_GET_SEQ(hdr) ((hdr)[HDR_INDX_SEQ] & 0x3f) | |
217 | ||
218 | /* The maximum data length. */ | |
219 | #define DATA_MAXLEN 1023 | |
220 | ||
221 | /* The trailer offset. */ | |
222 | #define TRLR_OFFSET HDR_OFFSET | |
223 | ||
224 | /* The indices of the bytes in the packet trailer. */ | |
225 | #define TRLR_INDX_CSUM1 0 | |
226 | #define TRLR_INDX_CSUM2 1 | |
227 | #define TRLR_INDX_CSUM3 2 | |
228 | #define TRLR_LENGTH 3 | |
229 | ||
230 | /* How to compute the trailer bytes. */ | |
231 | #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f)) | |
232 | #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f)) | |
233 | #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f)) | |
234 | ||
235 | /* Check that a trailer byte is reasonable. */ | |
236 | #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET) | |
237 | ||
238 | /* Get data from the trailer. This evaluates its argument multiple | |
239 | times. */ | |
240 | #define TRLR_GET_CKSUM(trlr) \ | |
241 | ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \ | |
242 | + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \ | |
243 | + ((trlr)[TRLR_INDX_CSUM3] & 0x3f)) | |
244 | ||
245 | /* The sequence number modulos. */ | |
246 | #define SEQ_MODULOS (64) | |
247 | ||
248 | /* Set to 1 if the target is open. */ | |
249 | static int mips_is_open; | |
250 | ||
c2a0f1cb ILT |
251 | /* Set to 1 while the connection is being initialized. */ |
252 | static int mips_initializing; | |
253 | ||
33742334 ILT |
254 | /* The next sequence number to send. */ |
255 | static int mips_send_seq; | |
256 | ||
257 | /* The next sequence number we expect to receive. */ | |
258 | static int mips_receive_seq; | |
259 | ||
260 | /* The time to wait before retransmitting a packet, in seconds. */ | |
261 | static int mips_retransmit_wait = 3; | |
262 | ||
263 | /* The number of times to try retransmitting a packet before giving up. */ | |
264 | static int mips_send_retries = 10; | |
265 | ||
266 | /* The number of garbage characters to accept when looking for an | |
267 | SYN for the next packet. */ | |
268 | static int mips_syn_garbage = 1050; | |
269 | ||
270 | /* The time to wait for a packet, in seconds. */ | |
c2a0f1cb | 271 | static int mips_receive_wait = 5; |
33742334 ILT |
272 | |
273 | /* Set if we have sent a packet to the board but have not yet received | |
274 | a reply. */ | |
275 | static int mips_need_reply = 0; | |
276 | ||
1724c671 SG |
277 | /* Handle used to access serial I/O stream. */ |
278 | static serial_t mips_desc; | |
279 | ||
cd10c7e3 SG |
280 | /* Counts the number of times the user tried to interrupt the target (usually |
281 | via ^C. */ | |
282 | static int interrupt_count; | |
283 | ||
284 | /* If non-zero, means that the target is running. */ | |
285 | static int mips_wait_flag = 0; | |
286 | ||
287 | /* If non-zero, monitor supports breakpoint commands. */ | |
288 | static monitor_supports_breakpoints = 0; | |
289 | ||
290 | /* Data cache header. */ | |
291 | ||
292 | static DCACHE *mips_dcache; | |
293 | ||
294 | /* Non-zero means that we've just hit a read or write watchpoint */ | |
295 | static int hit_watchpoint; | |
296 | ||
4fb192be JK |
297 | /* Handle low-level error that we can't recover from. Note that just |
298 | error()ing out from target_wait or some such low-level place will cause | |
299 | all hell to break loose--the rest of GDB will tend to get left in an | |
300 | inconsistent state. */ | |
301 | ||
2b9fbee4 | 302 | static NORETURN void |
73d3dbd4 | 303 | #ifdef ANSI_PROTOTYPES |
85c613aa C |
304 | mips_error (char *string, ...) |
305 | #else | |
4fb192be JK |
306 | mips_error (va_alist) |
307 | va_dcl | |
85c613aa | 308 | #endif |
4fb192be JK |
309 | { |
310 | va_list args; | |
4fb192be | 311 | |
73d3dbd4 | 312 | #ifdef ANSI_PROTOTYPES |
85c613aa C |
313 | va_start (args, string); |
314 | #else | |
315 | char *string; | |
4fb192be | 316 | va_start (args); |
85c613aa C |
317 | string = va_arg (args, char *); |
318 | #endif | |
319 | ||
4fb192be JK |
320 | target_terminal_ours (); |
321 | wrap_here(""); /* Force out any buffered output */ | |
322 | gdb_flush (gdb_stdout); | |
323 | if (error_pre_print) | |
324 | fprintf_filtered (gdb_stderr, error_pre_print); | |
4fb192be JK |
325 | vfprintf_filtered (gdb_stderr, string, args); |
326 | fprintf_filtered (gdb_stderr, "\n"); | |
327 | va_end (args); | |
cd10c7e3 | 328 | gdb_flush (gdb_stderr); |
4fb192be | 329 | |
96e5f161 JK |
330 | /* Clean up in such a way that mips_close won't try to talk to the |
331 | board (it almost surely won't work since we weren't able to talk to | |
332 | it). */ | |
333 | mips_is_open = 0; | |
334 | SERIAL_CLOSE (mips_desc); | |
335 | ||
336 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
4fb192be JK |
337 | target_mourn_inferior (); |
338 | ||
339 | return_to_top_level (RETURN_ERROR); | |
340 | } | |
341 | ||
cd10c7e3 SG |
342 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if |
343 | timed out. */ | |
344 | ||
4704fd9c SG |
345 | int |
346 | mips_expect (string) | |
347 | char *string; | |
348 | { | |
349 | char *p = string; | |
350 | int c; | |
351 | ||
352 | immediate_quit = 1; | |
353 | while (1) | |
354 | { | |
355 | ||
356 | /* Must use SERIAL_READCHAR here cuz mips_readchar would get confused if we | |
0e3a4b1e | 357 | were waiting for the TARGET_MONITOR_PROMPT... */ |
4704fd9c SG |
358 | |
359 | c = SERIAL_READCHAR (mips_desc, 2); | |
360 | ||
361 | if (c == SERIAL_TIMEOUT) | |
362 | return 0; | |
363 | ||
364 | if (c == *p++) | |
365 | { | |
366 | if (*p == '\0') | |
367 | { | |
368 | immediate_quit = 0; | |
369 | ||
370 | return 1; | |
371 | } | |
372 | } | |
373 | else | |
374 | { | |
375 | p = string; | |
376 | if (c == *p) | |
377 | p++; | |
378 | } | |
379 | } | |
380 | } | |
381 | ||
9a9a88c1 ILT |
382 | /* Read a character from the remote, aborting on error. Returns |
383 | SERIAL_TIMEOUT on timeout (since that's what SERIAL_READCHAR | |
0e3a4b1e JSC |
384 | returns). FIXME: If we see the string TARGET_MONITOR_PROMPT from |
385 | the board, then we are debugging on the main console port, and we | |
386 | have somehow dropped out of remote debugging mode. In this case, | |
387 | we automatically go back in to remote debugging mode. This is a | |
388 | hack, put in because I can't find any way for a program running on | |
389 | the remote board to terminate without also ending remote debugging | |
9a9a88c1 ILT |
390 | mode. I assume users won't have any trouble with this; for one |
391 | thing, the IDT documentation generally assumes that the remote | |
392 | debugging port is not the console port. This is, however, very | |
393 | convenient for DejaGnu when you only have one connected serial | |
394 | port. */ | |
33742334 ILT |
395 | |
396 | static int | |
397 | mips_readchar (timeout) | |
398 | int timeout; | |
399 | { | |
400 | int ch; | |
c2a0f1cb | 401 | static int state = 0; |
0e3a4b1e | 402 | static char nextstate[] = TARGET_MONITOR_PROMPT; |
4887063b SG |
403 | #ifdef MAINTENANCE_CMDS |
404 | int i; | |
405 | ||
406 | i = timeout; | |
407 | if (i == -1 && watchdog > 0) | |
408 | i = watchdog; | |
409 | #endif | |
33742334 | 410 | |
0e3a4b1e | 411 | if (state == (sizeof(nextstate) / sizeof(char))) |
b0a0ee52 | 412 | timeout = 1; |
1724c671 | 413 | ch = SERIAL_READCHAR (mips_desc, timeout); |
4887063b SG |
414 | #ifdef MAINTENANCE_CMDS |
415 | if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off */ | |
416 | { | |
417 | target_mourn_inferior (); | |
418 | error ("Watchdog has expired. Target detached.\n"); | |
419 | } | |
420 | #endif | |
1724c671 | 421 | if (ch == SERIAL_EOF) |
4fb192be | 422 | mips_error ("End of file from remote"); |
1724c671 | 423 | if (ch == SERIAL_ERROR) |
4fb192be | 424 | mips_error ("Error reading from remote: %s", safe_strerror (errno)); |
cd10c7e3 | 425 | if (remote_debug > 1) |
33742334 | 426 | { |
47d52968 JK |
427 | /* Don't use _filtered; we can't deal with a QUIT out of |
428 | target_wait, and I think this might be called from there. */ | |
1724c671 | 429 | if (ch != SERIAL_TIMEOUT) |
47d52968 | 430 | printf_unfiltered ("Read '%c' %d 0x%x\n", ch, ch, ch); |
33742334 | 431 | else |
47d52968 | 432 | printf_unfiltered ("Timed out in read\n"); |
33742334 | 433 | } |
c2a0f1cb | 434 | |
0e3a4b1e JSC |
435 | /* If we have seen TARGET_MONITOR_PROMPT and we either time out, or |
436 | we see a @ (which was echoed from a packet we sent), reset the | |
437 | board as described above. The first character in a packet after | |
438 | the SYN (which is not echoed) is always an @ unless the packet is | |
439 | more than 64 characters long, which ours never are. */ | |
1724c671 | 440 | if ((ch == SERIAL_TIMEOUT || ch == '@') |
0e3a4b1e | 441 | && state == (sizeof(nextstate) / sizeof(char)) |
c2a0f1cb ILT |
442 | && ! mips_initializing) |
443 | { | |
cd10c7e3 | 444 | if (remote_debug > 0) |
47d52968 JK |
445 | /* Don't use _filtered; we can't deal with a QUIT out of |
446 | target_wait, and I think this might be called from there. */ | |
447 | printf_unfiltered ("Reinitializing MIPS debugging mode\n"); | |
c2a0f1cb ILT |
448 | |
449 | mips_need_reply = 0; | |
450 | mips_initialize (); | |
451 | ||
452 | state = 0; | |
453 | ||
4887063b SG |
454 | /* At this point, about the only thing we can do is abort the command |
455 | in progress and get back to command level as quickly as possible. */ | |
456 | ||
457 | error ("Remote board reset, debug protocol re-initialized."); | |
c2a0f1cb ILT |
458 | } |
459 | ||
460 | if (ch == nextstate[state]) | |
461 | ++state; | |
462 | else | |
463 | state = 0; | |
464 | ||
33742334 ILT |
465 | return ch; |
466 | } | |
467 | ||
468 | /* Get a packet header, putting the data in the supplied buffer. | |
469 | PGARBAGE is a pointer to the number of garbage characters received | |
470 | so far. CH is the last character received. Returns 0 for success, | |
471 | or -1 for timeout. */ | |
472 | ||
473 | static int | |
474 | mips_receive_header (hdr, pgarbage, ch, timeout) | |
475 | unsigned char *hdr; | |
476 | int *pgarbage; | |
477 | int ch; | |
478 | int timeout; | |
479 | { | |
480 | int i; | |
481 | ||
482 | while (1) | |
483 | { | |
484 | /* Wait for a SYN. mips_syn_garbage is intended to prevent | |
485 | sitting here indefinitely if the board sends us one garbage | |
486 | character per second. ch may already have a value from the | |
487 | last time through the loop. */ | |
488 | while (ch != SYN) | |
489 | { | |
490 | ch = mips_readchar (timeout); | |
9a9a88c1 | 491 | if (ch == SERIAL_TIMEOUT) |
33742334 ILT |
492 | return -1; |
493 | if (ch != SYN) | |
494 | { | |
495 | /* Printing the character here lets the user of gdb see | |
496 | what the program is outputting, if the debugging is | |
47d52968 JK |
497 | being done on the console port. Don't use _filtered; |
498 | we can't deal with a QUIT out of target_wait. */ | |
cd10c7e3 | 499 | if (! mips_initializing || remote_debug > 0) |
c2a0f1cb | 500 | { |
7d13174e SS |
501 | if (ch < 0x20 && ch != '\n') |
502 | { | |
503 | putchar_unfiltered ('^'); | |
504 | putchar_unfiltered (ch + 0x40); | |
505 | } | |
506 | else | |
507 | putchar_unfiltered (ch); | |
199b2450 | 508 | gdb_flush (gdb_stdout); |
c2a0f1cb | 509 | } |
33742334 ILT |
510 | |
511 | ++*pgarbage; | |
4c5bc9f4 SG |
512 | if (mips_syn_garbage > 0 |
513 | && *pgarbage > mips_syn_garbage) | |
cd10c7e3 SG |
514 | mips_error ("Debug protocol failure: more than %d characters before a sync.", |
515 | mips_syn_garbage); | |
33742334 ILT |
516 | } |
517 | } | |
518 | ||
519 | /* Get the packet header following the SYN. */ | |
520 | for (i = 1; i < HDR_LENGTH; i++) | |
521 | { | |
522 | ch = mips_readchar (timeout); | |
9a9a88c1 | 523 | if (ch == SERIAL_TIMEOUT) |
33742334 ILT |
524 | return -1; |
525 | ||
526 | /* Make sure this is a header byte. */ | |
527 | if (ch == SYN || ! HDR_CHECK (ch)) | |
528 | break; | |
529 | ||
530 | hdr[i] = ch; | |
531 | } | |
532 | ||
533 | /* If we got the complete header, we can return. Otherwise we | |
534 | loop around and keep looking for SYN. */ | |
535 | if (i >= HDR_LENGTH) | |
536 | return 0; | |
537 | } | |
538 | } | |
539 | ||
540 | /* Get a packet header, putting the data in the supplied buffer. | |
541 | PGARBAGE is a pointer to the number of garbage characters received | |
542 | so far. The last character read is returned in *PCH. Returns 0 | |
543 | for success, -1 for timeout, -2 for error. */ | |
544 | ||
545 | static int | |
546 | mips_receive_trailer (trlr, pgarbage, pch, timeout) | |
547 | unsigned char *trlr; | |
548 | int *pgarbage; | |
549 | int *pch; | |
550 | int timeout; | |
551 | { | |
552 | int i; | |
553 | int ch; | |
554 | ||
555 | for (i = 0; i < TRLR_LENGTH; i++) | |
556 | { | |
557 | ch = mips_readchar (timeout); | |
558 | *pch = ch; | |
9a9a88c1 | 559 | if (ch == SERIAL_TIMEOUT) |
33742334 ILT |
560 | return -1; |
561 | if (! TRLR_CHECK (ch)) | |
562 | return -2; | |
563 | trlr[i] = ch; | |
564 | } | |
565 | return 0; | |
566 | } | |
567 | ||
568 | /* Get the checksum of a packet. HDR points to the packet header. | |
569 | DATA points to the packet data. LEN is the length of DATA. */ | |
570 | ||
571 | static int | |
572 | mips_cksum (hdr, data, len) | |
573 | const unsigned char *hdr; | |
574 | const unsigned char *data; | |
575 | int len; | |
576 | { | |
577 | register const unsigned char *p; | |
578 | register int c; | |
579 | register int cksum; | |
580 | ||
581 | cksum = 0; | |
582 | ||
583 | /* The initial SYN is not included in the checksum. */ | |
584 | c = HDR_LENGTH - 1; | |
585 | p = hdr + 1; | |
586 | while (c-- != 0) | |
587 | cksum += *p++; | |
588 | ||
589 | c = len; | |
590 | p = data; | |
591 | while (c-- != 0) | |
592 | cksum += *p++; | |
593 | ||
594 | return cksum; | |
595 | } | |
596 | ||
597 | /* Send a packet containing the given ASCII string. */ | |
598 | ||
599 | static void | |
c2a0f1cb | 600 | mips_send_packet (s, get_ack) |
33742334 | 601 | const char *s; |
c2a0f1cb | 602 | int get_ack; |
33742334 ILT |
603 | { |
604 | unsigned int len; | |
605 | unsigned char *packet; | |
606 | register int cksum; | |
607 | int try; | |
608 | ||
609 | len = strlen (s); | |
610 | if (len > DATA_MAXLEN) | |
4fb192be | 611 | mips_error ("MIPS protocol data packet too long: %s", s); |
33742334 ILT |
612 | |
613 | packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1); | |
614 | ||
615 | packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq); | |
616 | packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq); | |
617 | packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq); | |
618 | packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq); | |
619 | ||
620 | memcpy (packet + HDR_LENGTH, s, len); | |
621 | ||
622 | cksum = mips_cksum (packet, packet + HDR_LENGTH, len); | |
623 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
624 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
625 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
626 | ||
627 | /* Increment the sequence number. This will set mips_send_seq to | |
628 | the sequence number we expect in the acknowledgement. */ | |
629 | mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS; | |
630 | ||
631 | /* We can only have one outstanding data packet, so we just wait for | |
632 | the acknowledgement here. Keep retransmitting the packet until | |
633 | we get one, or until we've tried too many times. */ | |
634 | for (try = 0; try < mips_send_retries; try++) | |
635 | { | |
636 | int garbage; | |
637 | int ch; | |
638 | ||
cd10c7e3 | 639 | if (remote_debug > 0) |
33742334 | 640 | { |
47d52968 JK |
641 | /* Don't use _filtered; we can't deal with a QUIT out of |
642 | target_wait, and I think this might be called from there. */ | |
33742334 | 643 | packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0'; |
47d52968 | 644 | printf_unfiltered ("Writing \"%s\"\n", packet + 1); |
33742334 ILT |
645 | } |
646 | ||
9a9a88c1 ILT |
647 | if (SERIAL_WRITE (mips_desc, packet, |
648 | HDR_LENGTH + len + TRLR_LENGTH) != 0) | |
4fb192be | 649 | mips_error ("write to target failed: %s", safe_strerror (errno)); |
33742334 | 650 | |
4704fd9c SG |
651 | if (! get_ack) |
652 | return; | |
653 | ||
33742334 ILT |
654 | garbage = 0; |
655 | ch = 0; | |
656 | while (1) | |
657 | { | |
658 | unsigned char hdr[HDR_LENGTH + 1]; | |
659 | unsigned char trlr[TRLR_LENGTH + 1]; | |
660 | int err; | |
661 | int seq; | |
662 | ||
663 | /* Get the packet header. If we time out, resend the data | |
664 | packet. */ | |
665 | err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait); | |
666 | if (err != 0) | |
667 | break; | |
668 | ||
669 | ch = 0; | |
670 | ||
671 | /* If we get a data packet, assume it is a duplicate and | |
672 | ignore it. FIXME: If the acknowledgement is lost, this | |
673 | data packet may be the packet the remote sends after the | |
674 | acknowledgement. */ | |
675 | if (HDR_IS_DATA (hdr)) | |
676 | continue; | |
677 | ||
678 | /* If the length is not 0, this is a garbled packet. */ | |
679 | if (HDR_GET_LEN (hdr) != 0) | |
680 | continue; | |
681 | ||
682 | /* Get the packet trailer. */ | |
683 | err = mips_receive_trailer (trlr, &garbage, &ch, | |
684 | mips_retransmit_wait); | |
685 | ||
686 | /* If we timed out, resend the data packet. */ | |
687 | if (err == -1) | |
688 | break; | |
689 | ||
690 | /* If we got a bad character, reread the header. */ | |
691 | if (err != 0) | |
692 | continue; | |
693 | ||
694 | /* If the checksum does not match the trailer checksum, this | |
695 | is a bad packet; ignore it. */ | |
696 | if (mips_cksum (hdr, (unsigned char *) NULL, 0) | |
697 | != TRLR_GET_CKSUM (trlr)) | |
698 | continue; | |
699 | ||
cd10c7e3 | 700 | if (remote_debug > 0) |
33742334 ILT |
701 | { |
702 | hdr[HDR_LENGTH] = '\0'; | |
703 | trlr[TRLR_LENGTH] = '\0'; | |
47d52968 JK |
704 | /* Don't use _filtered; we can't deal with a QUIT out of |
705 | target_wait, and I think this might be called from there. */ | |
706 | printf_unfiltered ("Got ack %d \"%s%s\"\n", | |
f63f30e2 | 707 | HDR_GET_SEQ (hdr), hdr + 1, trlr); |
33742334 ILT |
708 | } |
709 | ||
710 | /* If this ack is for the current packet, we're done. */ | |
711 | seq = HDR_GET_SEQ (hdr); | |
712 | if (seq == mips_send_seq) | |
713 | return; | |
714 | ||
715 | /* If this ack is for the last packet, resend the current | |
716 | packet. */ | |
717 | if ((seq + 1) % SEQ_MODULOS == mips_send_seq) | |
718 | break; | |
719 | ||
720 | /* Otherwise this is a bad ack; ignore it. Increment the | |
721 | garbage count to ensure that we do not stay in this loop | |
722 | forever. */ | |
723 | ++garbage; | |
724 | } | |
725 | } | |
726 | ||
4fb192be | 727 | mips_error ("Remote did not acknowledge packet"); |
33742334 ILT |
728 | } |
729 | ||
730 | /* Receive and acknowledge a packet, returning the data in BUFF (which | |
731 | should be DATA_MAXLEN + 1 bytes). The protocol documentation | |
732 | implies that only the sender retransmits packets, so this code just | |
733 | waits silently for a packet. It returns the length of the received | |
96e5f161 JK |
734 | packet. If THROW_ERROR is nonzero, call error() on errors. If not, |
735 | don't print an error message and return -1. */ | |
33742334 ILT |
736 | |
737 | static int | |
4c6071f7 | 738 | mips_receive_packet (buff, throw_error, timeout) |
33742334 | 739 | char *buff; |
96e5f161 | 740 | int throw_error; |
4c6071f7 | 741 | int timeout; |
33742334 ILT |
742 | { |
743 | int ch; | |
744 | int garbage; | |
745 | int len; | |
746 | unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1]; | |
747 | int cksum; | |
748 | ||
749 | ch = 0; | |
750 | garbage = 0; | |
751 | while (1) | |
752 | { | |
753 | unsigned char hdr[HDR_LENGTH]; | |
754 | unsigned char trlr[TRLR_LENGTH]; | |
755 | int i; | |
756 | int err; | |
757 | ||
4c6071f7 | 758 | if (mips_receive_header (hdr, &garbage, ch, timeout) != 0) |
96e5f161 JK |
759 | { |
760 | if (throw_error) | |
761 | mips_error ("Timed out waiting for remote packet"); | |
762 | else | |
763 | return -1; | |
764 | } | |
33742334 ILT |
765 | |
766 | ch = 0; | |
767 | ||
768 | /* An acknowledgement is probably a duplicate; ignore it. */ | |
769 | if (! HDR_IS_DATA (hdr)) | |
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. */ | |
cd10c7e3 | 773 | if (remote_debug > 0) |
47d52968 | 774 | printf_unfiltered ("Ignoring unexpected ACK\n"); |
33742334 ILT |
775 | continue; |
776 | } | |
777 | ||
778 | /* If this is the wrong sequence number, ignore it. */ | |
779 | if (HDR_GET_SEQ (hdr) != mips_receive_seq) | |
780 | { | |
47d52968 JK |
781 | /* Don't use _filtered; we can't deal with a QUIT out of |
782 | target_wait, and I think this might be called from there. */ | |
cd10c7e3 | 783 | if (remote_debug > 0) |
47d52968 | 784 | printf_unfiltered ("Ignoring sequence number %d (want %d)\n", |
33742334 ILT |
785 | HDR_GET_SEQ (hdr), mips_receive_seq); |
786 | continue; | |
787 | } | |
788 | ||
789 | len = HDR_GET_LEN (hdr); | |
790 | ||
791 | for (i = 0; i < len; i++) | |
792 | { | |
793 | int rch; | |
794 | ||
4c6071f7 | 795 | rch = mips_readchar (timeout); |
33742334 ILT |
796 | if (rch == SYN) |
797 | { | |
798 | ch = SYN; | |
799 | break; | |
800 | } | |
9a9a88c1 | 801 | if (rch == SERIAL_TIMEOUT) |
96e5f161 JK |
802 | { |
803 | if (throw_error) | |
804 | mips_error ("Timed out waiting for remote packet"); | |
805 | else | |
806 | return -1; | |
807 | } | |
33742334 ILT |
808 | buff[i] = rch; |
809 | } | |
810 | ||
811 | if (i < len) | |
812 | { | |
47d52968 JK |
813 | /* Don't use _filtered; we can't deal with a QUIT out of |
814 | target_wait, and I think this might be called from there. */ | |
cd10c7e3 | 815 | if (remote_debug > 0) |
47d52968 | 816 | printf_unfiltered ("Got new SYN after %d chars (wanted %d)\n", |
33742334 ILT |
817 | i, len); |
818 | continue; | |
819 | } | |
820 | ||
4c6071f7 | 821 | err = mips_receive_trailer (trlr, &garbage, &ch, timeout); |
33742334 | 822 | if (err == -1) |
96e5f161 JK |
823 | { |
824 | if (throw_error) | |
825 | mips_error ("Timed out waiting for packet"); | |
826 | else | |
827 | return -1; | |
828 | } | |
33742334 ILT |
829 | if (err == -2) |
830 | { | |
47d52968 JK |
831 | /* Don't use _filtered; we can't deal with a QUIT out of |
832 | target_wait, and I think this might be called from there. */ | |
cd10c7e3 | 833 | if (remote_debug > 0) |
47d52968 | 834 | printf_unfiltered ("Got SYN when wanted trailer\n"); |
33742334 ILT |
835 | continue; |
836 | } | |
837 | ||
838 | if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr)) | |
839 | break; | |
840 | ||
cd10c7e3 | 841 | if (remote_debug > 0) |
47d52968 JK |
842 | /* Don't use _filtered; we can't deal with a QUIT out of |
843 | target_wait, and I think this might be called from there. */ | |
844 | printf_unfiltered ("Bad checksum; data %d, trailer %d\n", | |
33742334 ILT |
845 | mips_cksum (hdr, buff, len), |
846 | TRLR_GET_CKSUM (trlr)); | |
847 | ||
848 | /* The checksum failed. Send an acknowledgement for the | |
849 | previous packet to tell the remote to resend the packet. */ | |
850 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); | |
851 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
852 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
853 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
854 | ||
855 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
856 | ||
857 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
858 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
859 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
860 | ||
cd10c7e3 | 861 | if (remote_debug > 0) |
33742334 ILT |
862 | { |
863 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
47d52968 JK |
864 | /* Don't use _filtered; we can't deal with a QUIT out of |
865 | target_wait, and I think this might be called from there. */ | |
866 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, | |
33742334 ILT |
867 | ack + 1); |
868 | } | |
869 | ||
9a9a88c1 | 870 | if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
96e5f161 JK |
871 | { |
872 | if (throw_error) | |
873 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
874 | else | |
875 | return -1; | |
876 | } | |
33742334 ILT |
877 | } |
878 | ||
cd10c7e3 | 879 | if (remote_debug > 0) |
33742334 ILT |
880 | { |
881 | buff[len] = '\0'; | |
47d52968 JK |
882 | /* Don't use _filtered; we can't deal with a QUIT out of |
883 | target_wait, and I think this might be called from there. */ | |
884 | printf_unfiltered ("Got packet \"%s\"\n", buff); | |
33742334 ILT |
885 | } |
886 | ||
887 | /* We got the packet. Send an acknowledgement. */ | |
888 | mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS; | |
889 | ||
890 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); | |
891 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
892 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
893 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
894 | ||
895 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
896 | ||
897 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
898 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
899 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
900 | ||
cd10c7e3 | 901 | if (remote_debug > 0) |
33742334 ILT |
902 | { |
903 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
47d52968 JK |
904 | /* Don't use _filtered; we can't deal with a QUIT out of |
905 | target_wait, and I think this might be called from there. */ | |
906 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, | |
33742334 ILT |
907 | ack + 1); |
908 | } | |
909 | ||
9a9a88c1 | 910 | if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
96e5f161 JK |
911 | { |
912 | if (throw_error) | |
913 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
914 | else | |
915 | return -1; | |
916 | } | |
33742334 ILT |
917 | |
918 | return len; | |
919 | } | |
920 | \f | |
921 | /* Optionally send a request to the remote system and optionally wait | |
922 | for the reply. This implements the remote debugging protocol, | |
923 | which is built on top of the packet protocol defined above. Each | |
924 | request has an ADDR argument and a DATA argument. The following | |
925 | requests are defined: | |
926 | ||
927 | \0 don't send a request; just wait for a reply | |
928 | i read word from instruction space at ADDR | |
929 | d read word from data space at ADDR | |
930 | I write DATA to instruction space at ADDR | |
931 | D write DATA to data space at ADDR | |
932 | r read register number ADDR | |
933 | R set register number ADDR to value DATA | |
934 | c continue execution (if ADDR != 1, set pc to ADDR) | |
935 | s single step (if ADDR != 1, set pc to ADDR) | |
936 | ||
937 | The read requests return the value requested. The write requests | |
938 | return the previous value in the changed location. The execution | |
939 | requests return a UNIX wait value (the approximate signal which | |
940 | caused execution to stop is in the upper eight bits). | |
941 | ||
942 | If PERR is not NULL, this function waits for a reply. If an error | |
943 | occurs, it sets *PERR to 1 and sets errno according to what the | |
944 | target board reports. */ | |
945 | ||
946 | static int | |
cd10c7e3 SG |
947 | mips_request (cmd, addr, data, perr, timeout, buff) |
948 | int cmd; | |
33742334 ILT |
949 | unsigned int addr; |
950 | unsigned int data; | |
951 | int *perr; | |
4c6071f7 | 952 | int timeout; |
cd10c7e3 | 953 | char *buff; |
33742334 | 954 | { |
cd10c7e3 | 955 | char myBuff[DATA_MAXLEN + 1]; |
33742334 ILT |
956 | int len; |
957 | int rpid; | |
958 | char rcmd; | |
959 | int rerrflg; | |
960 | int rresponse; | |
4887063b | 961 | |
cd10c7e3 SG |
962 | if (buff == (char *) NULL) |
963 | buff = myBuff; | |
964 | ||
33742334 ILT |
965 | if (cmd != '\0') |
966 | { | |
967 | if (mips_need_reply) | |
968 | fatal ("mips_request: Trying to send command before reply"); | |
969 | sprintf (buff, "0x0 %c 0x%x 0x%x", cmd, addr, data); | |
c2a0f1cb | 970 | mips_send_packet (buff, 1); |
33742334 ILT |
971 | mips_need_reply = 1; |
972 | } | |
973 | ||
974 | if (perr == (int *) NULL) | |
975 | return 0; | |
976 | ||
977 | if (! mips_need_reply) | |
978 | fatal ("mips_request: Trying to get reply before command"); | |
979 | ||
980 | mips_need_reply = 0; | |
981 | ||
4c6071f7 | 982 | len = mips_receive_packet (buff, 1, timeout); |
33742334 ILT |
983 | buff[len] = '\0'; |
984 | ||
985 | if (sscanf (buff, "0x%x %c 0x%x 0x%x", | |
986 | &rpid, &rcmd, &rerrflg, &rresponse) != 4 | |
33742334 | 987 | || (cmd != '\0' && rcmd != cmd)) |
4fb192be | 988 | mips_error ("Bad response from remote board"); |
33742334 ILT |
989 | |
990 | if (rerrflg != 0) | |
991 | { | |
992 | *perr = 1; | |
993 | ||
994 | /* FIXME: This will returns MIPS errno numbers, which may or may | |
995 | not be the same as errno values used on other systems. If | |
996 | they stick to common errno values, they will be the same, but | |
997 | if they don't, they must be translated. */ | |
998 | errno = rresponse; | |
999 | ||
1000 | return 0; | |
1001 | } | |
1002 | ||
1003 | *perr = 0; | |
1004 | return rresponse; | |
1005 | } | |
1006 | ||
864df7e6 JK |
1007 | static void |
1008 | mips_initialize_cleanups (arg) | |
1009 | PTR arg; | |
1010 | { | |
1011 | mips_initializing = 0; | |
1012 | } | |
1013 | ||
c2a0f1cb ILT |
1014 | /* Initialize a new connection to the MIPS board, and make sure we are |
1015 | really connected. */ | |
1016 | ||
1017 | static void | |
1018 | mips_initialize () | |
1019 | { | |
c2a0f1cb ILT |
1020 | char buff[DATA_MAXLEN + 1]; |
1021 | int err; | |
864df7e6 | 1022 | struct cleanup *old_cleanups = make_cleanup (mips_initialize_cleanups, NULL); |
188c635f | 1023 | int j; |
c2a0f1cb | 1024 | |
864df7e6 JK |
1025 | /* What is this code doing here? I don't see any way it can happen, and |
1026 | it might mean mips_initializing didn't get cleared properly. | |
1027 | So I'll make it a warning. */ | |
188c635f | 1028 | |
c2a0f1cb | 1029 | if (mips_initializing) |
864df7e6 JK |
1030 | { |
1031 | warning ("internal error: mips_initialize called twice"); | |
1032 | return; | |
1033 | } | |
c2a0f1cb | 1034 | |
cd10c7e3 | 1035 | mips_wait_flag = 0; |
c2a0f1cb ILT |
1036 | mips_initializing = 1; |
1037 | ||
1038 | mips_send_seq = 0; | |
1039 | mips_receive_seq = 0; | |
1040 | ||
188c635f SG |
1041 | /* At this point, the packit protocol isn't responding. We'll try getting |
1042 | into the monitor, and restarting the protocol. */ | |
4704fd9c | 1043 | |
188c635f SG |
1044 | /* Force the system into the IDT monitor. After this we *should* be at the |
1045 | <IDT> prompt. */ | |
4704fd9c | 1046 | |
188c635f SG |
1047 | for (j = 1; j <= 4; j++) |
1048 | { | |
1049 | switch (j) | |
4704fd9c | 1050 | { |
188c635f SG |
1051 | case 1: /* First, try sending a break */ |
1052 | SERIAL_SEND_BREAK (mips_desc); | |
1053 | break; | |
1054 | case 2: /* Then, try a ^C */ | |
1055 | SERIAL_WRITE (mips_desc, "\003", 1); | |
1056 | break; | |
1057 | case 3: /* Then, try escaping from download */ | |
1058 | { | |
1059 | int i; | |
1060 | char srec[10]; | |
1061 | ||
1062 | /* We are possibly in binary download mode, having aborted in the | |
1063 | middle of an S-record. ^C won't work because of binary mode. | |
1064 | The only reliable way out is to send enough termination packets | |
1065 | (8 bytes) to fill up and then overflow the largest size S-record | |
1066 | (255 bytes in this case). This amounts to 256/8 + 1 packets. | |
1067 | */ | |
1068 | ||
1069 | mips_make_srec (srec, '7', 0, NULL, 0); | |
1070 | ||
1071 | for (i = 1; i <= 33; i++) | |
1072 | { | |
1073 | SERIAL_WRITE (mips_desc, srec, 8); | |
1074 | ||
1075 | if (SERIAL_READCHAR (mips_desc, 0) >= 0) | |
1076 | break; /* Break immediatly if we get something from | |
4704fd9c | 1077 | the board. */ |
188c635f | 1078 | } |
188c635f | 1079 | } |
afb69487 | 1080 | break; |
8b07d12c | 1081 | case 4: |
afb69487 | 1082 | mips_error ("Failed to initialize."); |
4704fd9c SG |
1083 | } |
1084 | ||
8b07d12c | 1085 | if (mips_expect (TARGET_MONITOR_PROMPT)) |
afb69487 | 1086 | break; |
c2a0f1cb | 1087 | } |
afb69487 | 1088 | |
8b07d12c JSC |
1089 | SERIAL_WRITE (mips_desc, "db tty0\015", sizeof "db tty0\015" - 1); |
1090 | mips_expect ("db tty0\015\012"); /* Eat the echo */ | |
1091 | ||
1092 | SERIAL_WRITE (mips_desc, "\015", sizeof "\015" - 1); | |
afb69487 | 1093 | |
8b07d12c | 1094 | if (mips_receive_packet (buff, 1, 3) < 0) |
afb69487 | 1095 | mips_error ("Failed to initialize (didn't receive packet)."); |
c2a0f1cb | 1096 | |
cd10c7e3 SG |
1097 | if (common_breakpoint ('b', -1, 0, NULL)) /* Clear all breakpoints */ |
1098 | monitor_supports_breakpoints = 0; /* Failed, don't use it anymore */ | |
1099 | else | |
1100 | monitor_supports_breakpoints = 1; | |
1101 | ||
864df7e6 | 1102 | do_cleanups (old_cleanups); |
c2a0f1cb ILT |
1103 | |
1104 | /* If this doesn't call error, we have connected; we don't care if | |
1105 | the request itself succeeds or fails. */ | |
188c635f | 1106 | |
4c6071f7 | 1107 | mips_request ('r', (unsigned int) 0, (unsigned int) 0, &err, |
cd10c7e3 SG |
1108 | mips_receive_wait, NULL); |
1109 | set_current_frame (create_new_frame (read_fp (), read_pc ())); | |
1110 | select_frame (get_current_frame (), 0); | |
c2a0f1cb ILT |
1111 | } |
1112 | ||
33742334 ILT |
1113 | /* Open a connection to the remote board. */ |
1114 | ||
1115 | static void | |
1116 | mips_open (name, from_tty) | |
1117 | char *name; | |
1118 | int from_tty; | |
1119 | { | |
ae55bdbc SS |
1120 | char *ptype; |
1121 | ||
33742334 ILT |
1122 | if (name == 0) |
1123 | error ( | |
1124 | "To open a MIPS remote debugging connection, you need to specify what serial\n\ | |
1125 | device is attached to the target board (e.g., /dev/ttya)."); | |
1126 | ||
1127 | target_preopen (from_tty); | |
1128 | ||
1129 | if (mips_is_open) | |
c2a0f1cb | 1130 | unpush_target (&mips_ops); |
33742334 | 1131 | |
1724c671 | 1132 | mips_desc = SERIAL_OPEN (name); |
9a9a88c1 | 1133 | if (mips_desc == (serial_t) NULL) |
33742334 ILT |
1134 | perror_with_name (name); |
1135 | ||
d48d9a28 KH |
1136 | if (baud_rate != -1) |
1137 | { | |
1138 | if (SERIAL_SETBAUDRATE (mips_desc, baud_rate)) | |
1139 | { | |
1140 | SERIAL_CLOSE (mips_desc); | |
1141 | perror_with_name (name); | |
1142 | } | |
1143 | } | |
1144 | ||
1724c671 SG |
1145 | SERIAL_RAW (mips_desc); |
1146 | ||
33742334 ILT |
1147 | mips_is_open = 1; |
1148 | ||
c2a0f1cb | 1149 | mips_initialize (); |
33742334 ILT |
1150 | |
1151 | if (from_tty) | |
199b2450 | 1152 | printf_unfiltered ("Remote MIPS debugging using %s\n", name); |
ae55bdbc SS |
1153 | |
1154 | /* Switch to using remote target now. */ | |
1155 | push_target (&mips_ops); | |
33742334 | 1156 | |
c2a0f1cb | 1157 | /* FIXME: Should we call start_remote here? */ |
ae55bdbc SS |
1158 | |
1159 | /* Try to figure out the processor model if possible. */ | |
1160 | ptype = mips_read_processor_type (); | |
1161 | if (ptype) | |
1162 | mips_set_processor_type_command (strsave (ptype), 0); | |
4887063b SG |
1163 | |
1164 | /* This is really the job of start_remote however, that makes an assumption | |
1165 | that the target is about to print out a status message of some sort. That | |
1166 | doesn't happen here (in fact, it may not be possible to get the monitor to | |
1167 | send the appropriate packet). */ | |
1168 | ||
1169 | flush_cached_frames (); | |
1170 | registers_changed (); | |
1171 | stop_pc = read_pc (); | |
1172 | set_current_frame (create_new_frame (read_fp (), stop_pc)); | |
1173 | select_frame (get_current_frame (), 0); | |
1174 | print_stack_frame (selected_frame, -1, 1); | |
33742334 ILT |
1175 | } |
1176 | ||
1177 | /* Close a connection to the remote board. */ | |
1178 | ||
1179 | static void | |
1180 | mips_close (quitting) | |
1181 | int quitting; | |
1182 | { | |
1183 | if (mips_is_open) | |
1184 | { | |
c2a0f1cb ILT |
1185 | int err; |
1186 | ||
1187 | mips_is_open = 0; | |
1188 | ||
33742334 | 1189 | /* Get the board out of remote debugging mode. */ |
4c6071f7 | 1190 | mips_request ('x', (unsigned int) 0, (unsigned int) 0, &err, |
cd10c7e3 | 1191 | mips_receive_wait, NULL); |
c2a0f1cb | 1192 | |
1724c671 | 1193 | SERIAL_CLOSE (mips_desc); |
33742334 ILT |
1194 | } |
1195 | } | |
1196 | ||
1197 | /* Detach from the remote board. */ | |
1198 | ||
1199 | static void | |
1200 | mips_detach (args, from_tty) | |
1201 | char *args; | |
1202 | int from_tty; | |
1203 | { | |
1204 | if (args) | |
1205 | error ("Argument given to \"detach\" when remotely debugging."); | |
1206 | ||
1207 | pop_target (); | |
cd10c7e3 SG |
1208 | |
1209 | mips_close (1); | |
1210 | ||
33742334 | 1211 | if (from_tty) |
199b2450 | 1212 | printf_unfiltered ("Ending remote MIPS debugging.\n"); |
33742334 ILT |
1213 | } |
1214 | ||
1215 | /* Tell the target board to resume. This does not wait for a reply | |
1216 | from the board. */ | |
1217 | ||
1218 | static void | |
25286543 | 1219 | mips_resume (pid, step, siggnal) |
67ac9759 JK |
1220 | int pid, step; |
1221 | enum target_signal siggnal; | |
33742334 | 1222 | { |
cd10c7e3 SG |
1223 | |
1224 | /* start-sanitize-gm */ | |
188c635f | 1225 | #ifndef GENERAL_MAGIC |
67ac9759 JK |
1226 | if (siggnal != TARGET_SIGNAL_0) |
1227 | warning | |
1228 | ("Can't send signals to a remote system. Try `handle %s ignore'.", | |
1229 | target_signal_to_name (siggnal)); | |
188c635f | 1230 | #endif /* GENERAL_MAGIC */ |
cd10c7e3 | 1231 | /* end-sanitize-gm */ |
33742334 ILT |
1232 | |
1233 | mips_request (step ? 's' : 'c', | |
c2a0f1cb | 1234 | (unsigned int) 1, |
cd10c7e3 | 1235 | (unsigned int) siggnal, |
4c6071f7 | 1236 | (int *) NULL, |
cd10c7e3 | 1237 | mips_receive_wait, NULL); |
33742334 ILT |
1238 | } |
1239 | ||
f3fe8934 JK |
1240 | /* Return the signal corresponding to SIG, where SIG is the number which |
1241 | the MIPS protocol uses for the signal. */ | |
1242 | enum target_signal | |
1243 | mips_signal_from_protocol (sig) | |
1244 | int sig; | |
1245 | { | |
1246 | /* We allow a few more signals than the IDT board actually returns, on | |
1247 | the theory that there is at least *some* hope that perhaps the numbering | |
1248 | for these signals is widely agreed upon. */ | |
1249 | if (sig <= 0 | |
1250 | || sig > 31) | |
1251 | return TARGET_SIGNAL_UNKNOWN; | |
1252 | ||
1253 | /* Don't want to use target_signal_from_host because we are converting | |
1254 | from MIPS signal numbers, not host ones. Our internal numbers | |
1255 | match the MIPS numbers for the signals the board can return, which | |
1256 | are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */ | |
1257 | return (enum target_signal) sig; | |
1258 | } | |
1259 | ||
33742334 ILT |
1260 | /* Wait until the remote stops, and return a wait status. */ |
1261 | ||
1262 | static int | |
f7fa951f DZ |
1263 | mips_wait (pid, status) |
1264 | int pid; | |
67ac9759 | 1265 | struct target_waitstatus *status; |
33742334 ILT |
1266 | { |
1267 | int rstatus; | |
1268 | int err; | |
cd10c7e3 SG |
1269 | char buff[DATA_MAXLEN]; |
1270 | int rpc, rfp, rsp; | |
1271 | char flags[20]; | |
1272 | int nfields; | |
1273 | ||
1274 | interrupt_count = 0; | |
1275 | hit_watchpoint = 0; | |
33742334 ILT |
1276 | |
1277 | /* If we have not sent a single step or continue command, then the | |
1278 | board is waiting for us to do something. Return a status | |
1279 | indicating that it is stopped. */ | |
1280 | if (! mips_need_reply) | |
1281 | { | |
67ac9759 JK |
1282 | status->kind = TARGET_WAITKIND_STOPPED; |
1283 | status->value.sig = TARGET_SIGNAL_TRAP; | |
33742334 ILT |
1284 | return 0; |
1285 | } | |
1286 | ||
4c6071f7 | 1287 | /* No timeout; we sit here as long as the program continues to execute. */ |
cd10c7e3 SG |
1288 | mips_wait_flag = 1; |
1289 | rstatus = mips_request ('\000', (unsigned int) 0, (unsigned int) 0, &err, -1, | |
1290 | buff); | |
1291 | mips_wait_flag = 0; | |
33742334 | 1292 | if (err) |
4fb192be | 1293 | mips_error ("Remote failure: %s", safe_strerror (errno)); |
33742334 | 1294 | |
cd10c7e3 SG |
1295 | nfields = sscanf (buff, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s", |
1296 | &rpc, &rfp, &rsp, flags); | |
1297 | ||
1298 | /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */ | |
1299 | ||
1300 | if (nfields == 7 || nfields == 9) | |
1301 | { | |
1302 | char buf[MAX_REGISTER_RAW_SIZE]; | |
1303 | ||
1304 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (PC_REGNUM), rpc); | |
1305 | supply_register (PC_REGNUM, buf); | |
1306 | ||
1307 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (PC_REGNUM), rfp); | |
1308 | supply_register (30, buf); /* This register they are avoiding and so it is unnamed */ | |
1309 | ||
1310 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (SP_REGNUM), rsp); | |
1311 | supply_register (SP_REGNUM, buf); | |
1312 | ||
1313 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (FP_REGNUM), 0); | |
1314 | supply_register (FP_REGNUM, buf); | |
1315 | ||
1316 | if (nfields == 9) | |
1317 | { | |
1318 | int i; | |
1319 | ||
1320 | for (i = 0; i <= 2; i++) | |
1321 | if (flags[i] == 'r' || flags[i] == 'w') | |
1322 | hit_watchpoint = 1; | |
1323 | else if (flags[i] == '\000') | |
1324 | break; | |
1325 | } | |
1326 | } | |
1327 | ||
67ac9759 JK |
1328 | /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG |
1329 | and so on, because the constants we want here are determined by the | |
1330 | MIPS protocol and have nothing to do with what host we are running on. */ | |
6397809b | 1331 | if ((rstatus & 0377) == 0) |
67ac9759 JK |
1332 | { |
1333 | status->kind = TARGET_WAITKIND_EXITED; | |
1334 | status->value.integer = (((rstatus) >> 8) & 0377); | |
1335 | } | |
6397809b | 1336 | else if ((rstatus & 0377) == 0177) |
67ac9759 | 1337 | { |
5efb3899 | 1338 | status->kind = TARGET_WAITKIND_STOPPED; |
f3fe8934 | 1339 | status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0377); |
67ac9759 JK |
1340 | } |
1341 | else | |
1342 | { | |
1343 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
f3fe8934 | 1344 | status->value.sig = mips_signal_from_protocol (rstatus & 0177); |
67ac9759 | 1345 | } |
33742334 ILT |
1346 | |
1347 | return 0; | |
1348 | } | |
1349 | ||
1350 | /* We have to map between the register numbers used by gdb and the | |
1351 | register numbers used by the debugging protocol. This function | |
1352 | assumes that we are using tm-mips.h. */ | |
1353 | ||
1354 | #define REGNO_OFFSET 96 | |
1355 | ||
1356 | static int | |
1357 | mips_map_regno (regno) | |
1358 | int regno; | |
1359 | { | |
1360 | if (regno < 32) | |
1361 | return regno; | |
1362 | if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32) | |
1363 | return regno - FP0_REGNUM + 32; | |
1364 | switch (regno) | |
1365 | { | |
1366 | case PC_REGNUM: | |
1367 | return REGNO_OFFSET + 0; | |
1368 | case CAUSE_REGNUM: | |
1369 | return REGNO_OFFSET + 1; | |
1370 | case HI_REGNUM: | |
1371 | return REGNO_OFFSET + 2; | |
1372 | case LO_REGNUM: | |
1373 | return REGNO_OFFSET + 3; | |
1374 | case FCRCS_REGNUM: | |
1375 | return REGNO_OFFSET + 4; | |
1376 | case FCRIR_REGNUM: | |
1377 | return REGNO_OFFSET + 5; | |
1378 | default: | |
1379 | /* FIXME: Is there a way to get the status register? */ | |
1380 | return 0; | |
1381 | } | |
1382 | } | |
1383 | ||
1384 | /* Fetch the remote registers. */ | |
1385 | ||
1386 | static void | |
1387 | mips_fetch_registers (regno) | |
1388 | int regno; | |
1389 | { | |
f4f0d174 | 1390 | unsigned LONGEST val; |
33742334 ILT |
1391 | int err; |
1392 | ||
1393 | if (regno == -1) | |
1394 | { | |
1395 | for (regno = 0; regno < NUM_REGS; regno++) | |
1396 | mips_fetch_registers (regno); | |
1397 | return; | |
1398 | } | |
1399 | ||
021b10e3 JK |
1400 | if (regno == FP_REGNUM || regno == ZERO_REGNUM) |
1401 | /* FP_REGNUM on the mips is a hack which is just supposed to read | |
1402 | zero (see also mips-nat.c). */ | |
1403 | val = 0; | |
1404 | else | |
1405 | { | |
1406 | val = mips_request ('r', (unsigned int) mips_map_regno (regno), | |
cd10c7e3 | 1407 | (unsigned int) 0, &err, mips_receive_wait, NULL); |
021b10e3 JK |
1408 | if (err) |
1409 | mips_error ("Can't read register %d: %s", regno, | |
1410 | safe_strerror (errno)); | |
1411 | } | |
33742334 | 1412 | |
34df79fc JK |
1413 | { |
1414 | char buf[MAX_REGISTER_RAW_SIZE]; | |
1415 | ||
1416 | /* We got the number the register holds, but gdb expects to see a | |
1417 | value in the target byte ordering. */ | |
1418 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (regno), val); | |
1419 | supply_register (regno, buf); | |
1420 | } | |
33742334 ILT |
1421 | } |
1422 | ||
1423 | /* Prepare to store registers. The MIPS protocol can store individual | |
1424 | registers, so this function doesn't have to do anything. */ | |
1425 | ||
1426 | static void | |
1427 | mips_prepare_to_store () | |
1428 | { | |
1429 | } | |
1430 | ||
1431 | /* Store remote register(s). */ | |
1432 | ||
1433 | static void | |
1434 | mips_store_registers (regno) | |
1435 | int regno; | |
1436 | { | |
1437 | int err; | |
1438 | ||
1439 | if (regno == -1) | |
1440 | { | |
1441 | for (regno = 0; regno < NUM_REGS; regno++) | |
1442 | mips_store_registers (regno); | |
1443 | return; | |
1444 | } | |
1445 | ||
1446 | mips_request ('R', (unsigned int) mips_map_regno (regno), | |
1447 | (unsigned int) read_register (regno), | |
cd10c7e3 | 1448 | &err, mips_receive_wait, NULL); |
33742334 | 1449 | if (err) |
4fb192be | 1450 | mips_error ("Can't write register %d: %s", regno, safe_strerror (errno)); |
33742334 ILT |
1451 | } |
1452 | ||
1453 | /* Fetch a word from the target board. */ | |
1454 | ||
1455 | static int | |
1456 | mips_fetch_word (addr) | |
1457 | CORE_ADDR addr; | |
1458 | { | |
1459 | int val; | |
1460 | int err; | |
1461 | ||
4c6071f7 | 1462 | val = mips_request ('d', (unsigned int) addr, (unsigned int) 0, &err, |
cd10c7e3 | 1463 | mips_receive_wait, NULL); |
33742334 ILT |
1464 | if (err) |
1465 | { | |
1466 | /* Data space failed; try instruction space. */ | |
4c6071f7 | 1467 | val = mips_request ('i', (unsigned int) addr, (unsigned int) 0, &err, |
cd10c7e3 | 1468 | mips_receive_wait, NULL); |
33742334 | 1469 | if (err) |
4fb192be | 1470 | mips_error ("Can't read address 0x%x: %s", addr, safe_strerror (errno)); |
33742334 ILT |
1471 | } |
1472 | return val; | |
1473 | } | |
1474 | ||
aa56c716 JK |
1475 | /* Store a word to the target board. Returns errno code or zero for |
1476 | success. If OLD_CONTENTS is non-NULL, put the old contents of that | |
1477 | memory location there. */ | |
33742334 | 1478 | |
aa56c716 JK |
1479 | static int |
1480 | mips_store_word (addr, val, old_contents) | |
33742334 ILT |
1481 | CORE_ADDR addr; |
1482 | int val; | |
aa56c716 | 1483 | char *old_contents; |
33742334 ILT |
1484 | { |
1485 | int err; | |
aa56c716 | 1486 | unsigned int oldcontents; |
33742334 | 1487 | |
aa56c716 JK |
1488 | oldcontents = mips_request ('D', (unsigned int) addr, (unsigned int) val, |
1489 | &err, | |
cd10c7e3 | 1490 | mips_receive_wait, NULL); |
33742334 ILT |
1491 | if (err) |
1492 | { | |
1493 | /* Data space failed; try instruction space. */ | |
aa56c716 JK |
1494 | oldcontents = mips_request ('I', (unsigned int) addr, |
1495 | (unsigned int) val, &err, | |
cd10c7e3 | 1496 | mips_receive_wait, NULL); |
33742334 | 1497 | if (err) |
aa56c716 | 1498 | return errno; |
33742334 | 1499 | } |
aa56c716 JK |
1500 | if (old_contents != NULL) |
1501 | store_unsigned_integer (old_contents, 4, oldcontents); | |
1502 | return 0; | |
33742334 ILT |
1503 | } |
1504 | ||
1505 | /* Read or write LEN bytes from inferior memory at MEMADDR, | |
1506 | transferring to or from debugger address MYADDR. Write to inferior | |
1507 | if SHOULD_WRITE is nonzero. Returns length of data written or | |
1508 | read; 0 for error. Note that protocol gives us the correct value | |
1509 | for a longword, since it transfers values in ASCII. We want the | |
1510 | byte values, so we have to swap the longword values. */ | |
1511 | ||
1512 | static int | |
1513 | mips_xfer_memory (memaddr, myaddr, len, write, ignore) | |
1514 | CORE_ADDR memaddr; | |
1515 | char *myaddr; | |
1516 | int len; | |
1517 | int write; | |
1518 | struct target_ops *ignore; | |
1519 | { | |
1520 | register int i; | |
1521 | /* Round starting address down to longword boundary. */ | |
1522 | register CORE_ADDR addr = memaddr &~ 3; | |
1523 | /* Round ending address up; get number of longwords that makes. */ | |
1524 | register int count = (((memaddr + len) - addr) + 3) / 4; | |
1525 | /* Allocate buffer of that many longwords. */ | |
34df79fc | 1526 | register char *buffer = alloca (count * 4); |
33742334 | 1527 | |
aa56c716 JK |
1528 | int status; |
1529 | ||
33742334 ILT |
1530 | if (write) |
1531 | { | |
1532 | /* Fill start and end extra bytes of buffer with existing data. */ | |
1533 | if (addr != memaddr || len < 4) | |
1534 | { | |
1535 | /* Need part of initial word -- fetch it. */ | |
34df79fc | 1536 | store_unsigned_integer (&buffer[0], 4, mips_fetch_word (addr)); |
33742334 ILT |
1537 | } |
1538 | ||
34df79fc | 1539 | if (count > 1) |
33742334 | 1540 | { |
34df79fc JK |
1541 | /* Need part of last word -- fetch it. FIXME: we do this even |
1542 | if we don't need it. */ | |
1543 | store_unsigned_integer (&buffer[(count - 1) * 4], 4, | |
1544 | mips_fetch_word (addr + (count - 1) * 4)); | |
33742334 ILT |
1545 | } |
1546 | ||
1547 | /* Copy data to be written over corresponding part of buffer */ | |
1548 | ||
1549 | memcpy ((char *) buffer + (memaddr & 3), myaddr, len); | |
1550 | ||
1551 | /* Write the entire buffer. */ | |
1552 | ||
1553 | for (i = 0; i < count; i++, addr += 4) | |
1554 | { | |
aa56c716 JK |
1555 | status = mips_store_word (addr, |
1556 | extract_unsigned_integer (&buffer[i*4], 4), | |
1557 | NULL); | |
7d13174e SS |
1558 | /* Report each kilobyte (we download 32-bit words at a time) */ |
1559 | if (i % 256 == 255) | |
1560 | { | |
1561 | printf_unfiltered ("*"); | |
1562 | fflush (stdout); | |
1563 | } | |
aa56c716 JK |
1564 | if (status) |
1565 | { | |
1566 | errno = status; | |
1567 | return 0; | |
1568 | } | |
34df79fc | 1569 | /* FIXME: Do we want a QUIT here? */ |
33742334 | 1570 | } |
7d13174e SS |
1571 | if (count >= 256) |
1572 | printf_unfiltered ("\n"); | |
33742334 ILT |
1573 | } |
1574 | else | |
1575 | { | |
1576 | /* Read all the longwords */ | |
1577 | for (i = 0; i < count; i++, addr += 4) | |
1578 | { | |
34df79fc | 1579 | store_unsigned_integer (&buffer[i*4], 4, mips_fetch_word (addr)); |
33742334 ILT |
1580 | QUIT; |
1581 | } | |
1582 | ||
1583 | /* Copy appropriate bytes out of the buffer. */ | |
34df79fc | 1584 | memcpy (myaddr, buffer + (memaddr & 3), len); |
33742334 ILT |
1585 | } |
1586 | return len; | |
1587 | } | |
1588 | ||
1589 | /* Print info on this target. */ | |
1590 | ||
1591 | static void | |
1592 | mips_files_info (ignore) | |
1593 | struct target_ops *ignore; | |
1594 | { | |
199b2450 | 1595 | printf_unfiltered ("Debugging a MIPS board over a serial line.\n"); |
33742334 ILT |
1596 | } |
1597 | ||
c2a0f1cb ILT |
1598 | /* Kill the process running on the board. This will actually only |
1599 | work if we are doing remote debugging over the console input. I | |
1600 | think that if IDT/sim had the remote debug interrupt enabled on the | |
1601 | right port, we could interrupt the process with a break signal. */ | |
1602 | ||
1603 | static void | |
1604 | mips_kill () | |
1605 | { | |
cd10c7e3 SG |
1606 | if (!mips_wait_flag) |
1607 | return; | |
1608 | ||
1609 | interrupt_count++; | |
1610 | ||
1611 | if (interrupt_count >= 2) | |
1612 | { | |
1613 | interrupt_count = 0; | |
1614 | ||
1615 | target_terminal_ours (); | |
1616 | ||
1617 | if (query ("Interrupted while waiting for the program.\n\ | |
1618 | Give up (and stop debugging it)? ")) | |
1619 | { | |
1620 | /* Clean up in such a way that mips_close won't try to talk to the | |
1621 | board (it almost surely won't work since we weren't able to talk to | |
1622 | it). */ | |
1623 | mips_wait_flag = 0; | |
1624 | mips_is_open = 0; | |
1625 | SERIAL_CLOSE (mips_desc); | |
1626 | ||
1627 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
1628 | target_mourn_inferior (); | |
1629 | ||
1630 | return_to_top_level (RETURN_QUIT); | |
1631 | } | |
1632 | ||
1633 | target_terminal_inferior (); | |
1634 | } | |
1635 | ||
1636 | if (remote_debug > 0) | |
1637 | printf_unfiltered ("Sending break\n"); | |
1638 | ||
1639 | SERIAL_SEND_BREAK (mips_desc); | |
1640 | ||
c2a0f1cb ILT |
1641 | #if 0 |
1642 | if (mips_is_open) | |
1643 | { | |
1644 | char cc; | |
1645 | ||
1646 | /* Send a ^C. */ | |
1647 | cc = '\003'; | |
1724c671 | 1648 | SERIAL_WRITE (mips_desc, &cc, 1); |
c2a0f1cb ILT |
1649 | sleep (1); |
1650 | target_mourn_inferior (); | |
1651 | } | |
1652 | #endif | |
1653 | } | |
1654 | ||
33742334 ILT |
1655 | /* Start running on the target board. */ |
1656 | ||
1657 | static void | |
1658 | mips_create_inferior (execfile, args, env) | |
1659 | char *execfile; | |
1660 | char *args; | |
1661 | char **env; | |
1662 | { | |
1663 | CORE_ADDR entry_pt; | |
1664 | ||
33742334 | 1665 | if (args && *args) |
aa56c716 JK |
1666 | { |
1667 | warning ("\ | |
1668 | Can't pass arguments to remote MIPS board; arguments ignored."); | |
1669 | /* And don't try to use them on the next "run" command. */ | |
1670 | execute_command ("set args", 0); | |
1671 | } | |
33742334 ILT |
1672 | |
1673 | if (execfile == 0 || exec_bfd == 0) | |
aa56c716 | 1674 | error ("No executable file specified"); |
33742334 ILT |
1675 | |
1676 | entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd); | |
1677 | ||
1678 | init_wait_for_inferior (); | |
1679 | ||
c2a0f1cb ILT |
1680 | /* FIXME: Should we set inferior_pid here? */ |
1681 | ||
cd10c7e3 | 1682 | /* start-sanitize-gm */ |
188c635f | 1683 | #ifdef GENERAL_MAGIC |
cd10c7e3 SG |
1684 | magic_create_inferior_hook (); |
1685 | proceed (entry_pt, TARGET_SIGNAL_PWR, 0); | |
1686 | #else | |
1687 | /* end-sanitize-gm */ | |
45dc9be3 | 1688 | proceed (entry_pt, TARGET_SIGNAL_DEFAULT, 0); |
cd10c7e3 | 1689 | /* start-sanitize-gm */ |
188c635f | 1690 | #endif /* GENERAL_MAGIC */ |
cd10c7e3 | 1691 | /* end-sanitize-gm */ |
33742334 ILT |
1692 | } |
1693 | ||
1694 | /* Clean up after a process. Actually nothing to do. */ | |
1695 | ||
1696 | static void | |
1697 | mips_mourn_inferior () | |
1698 | { | |
71607f9d | 1699 | unpush_target (&mips_ops); |
33742334 ILT |
1700 | generic_mourn_inferior (); |
1701 | } | |
1702 | \f | |
aa56c716 JK |
1703 | /* We can write a breakpoint and read the shadow contents in one |
1704 | operation. */ | |
1705 | ||
1706 | /* The IDT board uses an unusual breakpoint value, and sometimes gets | |
1707 | confused when it sees the usual MIPS breakpoint instruction. */ | |
1708 | ||
1a406ce8 ILT |
1709 | #define BREAK_INSN (0x00000a0d) |
1710 | #define BREAK_INSN_SIZE (4) | |
aa56c716 JK |
1711 | |
1712 | /* Insert a breakpoint on targets that don't have any better breakpoint | |
1713 | support. We read the contents of the target location and stash it, | |
1714 | then overwrite it with a breakpoint instruction. ADDR is the target | |
1715 | location in the target machine. CONTENTS_CACHE is a pointer to | |
1716 | memory allocated for saving the target contents. It is guaranteed | |
1717 | by the caller to be long enough to save sizeof BREAKPOINT bytes (this | |
1718 | is accomplished via BREAKPOINT_MAX). */ | |
1719 | ||
1720 | static int | |
1721 | mips_insert_breakpoint (addr, contents_cache) | |
1722 | CORE_ADDR addr; | |
1723 | char *contents_cache; | |
1724 | { | |
1725 | int status; | |
1726 | ||
cd10c7e3 SG |
1727 | if (monitor_supports_breakpoints) |
1728 | return common_breakpoint ('B', addr, 0x3, "f"); | |
1729 | ||
1a406ce8 | 1730 | return mips_store_word (addr, BREAK_INSN, contents_cache); |
aa56c716 JK |
1731 | } |
1732 | ||
1733 | static int | |
1734 | mips_remove_breakpoint (addr, contents_cache) | |
1735 | CORE_ADDR addr; | |
1736 | char *contents_cache; | |
1737 | { | |
cd10c7e3 SG |
1738 | if (monitor_supports_breakpoints) |
1739 | return common_breakpoint ('b', addr, 0, NULL); | |
1740 | ||
1a406ce8 | 1741 | return target_write_memory (addr, contents_cache, BREAK_INSN_SIZE); |
aa56c716 | 1742 | } |
4704fd9c | 1743 | |
cd10c7e3 SG |
1744 | /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1. |
1745 | This is used for memory ref breakpoints. */ | |
1746 | ||
1747 | static unsigned long | |
1748 | calculate_mask (addr, len) | |
1749 | CORE_ADDR addr; | |
1750 | int len; | |
1751 | { | |
1752 | unsigned long mask; | |
1753 | int i; | |
1754 | ||
1755 | mask = addr ^ (addr + len - 1); | |
1756 | ||
1757 | for (i = 32; i >= 0; i--) | |
1758 | if (mask == 0) | |
1759 | break; | |
1760 | else | |
1761 | mask >>= 1; | |
1762 | ||
1763 | mask = (unsigned long) 0xffffffff >> i; | |
1764 | ||
1765 | return mask; | |
1766 | } | |
1767 | ||
1768 | /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is either 1 | |
1769 | for a read watchpoint, or 2 for a read/write watchpoint. */ | |
1770 | ||
1771 | int | |
1772 | remote_mips_set_watchpoint (addr, len, type) | |
1773 | CORE_ADDR addr; | |
1774 | int len; | |
1775 | int type; | |
1776 | { | |
1777 | CORE_ADDR first_addr; | |
1778 | unsigned long mask; | |
1779 | char *flags; | |
1780 | ||
1781 | mask = calculate_mask (addr, len); | |
1782 | ||
1783 | first_addr = addr & ~mask; | |
1784 | ||
1785 | switch (type) | |
1786 | { | |
1787 | case 0: /* write */ | |
1788 | flags = "w"; | |
1789 | break; | |
1790 | case 1: /* read */ | |
1791 | flags = "r"; | |
1792 | break; | |
1793 | case 2: /* read/write */ | |
1794 | flags = "rw"; | |
1795 | break; | |
1796 | default: | |
1797 | abort (); | |
1798 | } | |
1799 | ||
1800 | if (common_breakpoint ('B', first_addr, mask, flags)) | |
1801 | return -1; | |
1802 | ||
1803 | return 0; | |
1804 | } | |
1805 | ||
1806 | int | |
1807 | remote_mips_remove_watchpoint (addr, len, type) | |
1808 | CORE_ADDR addr; | |
1809 | int len; | |
1810 | int type; | |
1811 | { | |
1812 | CORE_ADDR first_addr; | |
1813 | unsigned long mask; | |
1814 | ||
1815 | mask = calculate_mask (addr, len); | |
1816 | ||
1817 | first_addr = addr & ~mask; | |
1818 | ||
1819 | if (common_breakpoint ('b', first_addr, 0, NULL)) | |
1820 | return -1; | |
1821 | ||
1822 | return 0; | |
1823 | } | |
1824 | ||
1825 | int | |
1826 | remote_mips_stopped_by_watchpoint () | |
1827 | { | |
1828 | return hit_watchpoint; | |
1829 | } | |
1830 | ||
1831 | /* This routine generates the a breakpoint command of the form: | |
1832 | ||
1833 | 0x0 <CMD> <ADDR> <MASK> <FLAGS> | |
1834 | ||
1835 | Where <CMD> is one of: `B' to set, or `b' to clear a breakpoint. <ADDR> is | |
1836 | the address of the breakpoint. <MASK> is a don't care mask for addresses. | |
1837 | <FLAGS> is any combination of `r', `w', or `f' for read/write/or fetch. */ | |
1838 | ||
1839 | static int | |
1840 | common_breakpoint (cmd, addr, mask, flags) | |
1841 | int cmd; | |
1842 | CORE_ADDR addr; | |
1843 | CORE_ADDR mask; | |
1844 | char *flags; | |
1845 | { | |
1846 | int len; | |
1847 | char buf[DATA_MAXLEN + 1]; | |
1848 | char rcmd; | |
1849 | int rpid, rerrflg, rresponse; | |
1850 | int nfields; | |
1851 | ||
1852 | if (flags) | |
1853 | sprintf (buf, "0x0 %c 0x%x 0x%x %s", cmd, addr, mask, flags); | |
1854 | else | |
1855 | sprintf (buf, "0x0 %c 0x%x", cmd, addr); | |
1856 | ||
1857 | mips_send_packet (buf, 1); | |
1858 | ||
1859 | len = mips_receive_packet (buf, 1, mips_receive_wait); | |
1860 | ||
1861 | nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", &rpid, &rcmd, &rerrflg, &rresponse); | |
1862 | ||
1863 | if (nfields != 4 | |
1864 | || rcmd != cmd) | |
1865 | mips_error ("common_breakpoint: Bad response from remote board: %s", buf); | |
1866 | ||
1867 | if (rerrflg != 0) | |
1868 | { | |
188c635f | 1869 | if (rresponse != EINVAL) |
cd10c7e3 SG |
1870 | fprintf_unfiltered (stderr, "common_breakpoint (0x%x): Got error: 0x%x\n", |
1871 | addr, rresponse); | |
1872 | return 1; | |
1873 | } | |
1874 | ||
1875 | return 0; | |
1876 | } | |
1877 | \f | |
4704fd9c SG |
1878 | static void |
1879 | send_srec (srec, len, addr) | |
1880 | char *srec; | |
1881 | int len; | |
1882 | CORE_ADDR addr; | |
1883 | { | |
1884 | while (1) | |
1885 | { | |
1886 | int ch; | |
1887 | ||
1888 | SERIAL_WRITE (mips_desc, srec, len); | |
1889 | ||
1890 | ch = mips_readchar (2); | |
1891 | ||
1892 | switch (ch) | |
1893 | { | |
1894 | case SERIAL_TIMEOUT: | |
1895 | error ("Timeout during download."); | |
1896 | break; | |
1897 | case 0x6: /* ACK */ | |
1898 | return; | |
1899 | case 0x15: /* NACK */ | |
1900 | fprintf_unfiltered (gdb_stderr, "Download got a NACK at byte %d! Retrying.\n", addr); | |
1901 | continue; | |
1902 | default: | |
1903 | error ("Download got unexpected ack char: 0x%x, retrying.\n", ch); | |
1904 | } | |
1905 | } | |
1906 | } | |
1907 | ||
1908 | /* Download a binary file by converting it to S records. */ | |
1909 | ||
1910 | static void | |
1911 | mips_load_srec (args) | |
1912 | char *args; | |
1913 | { | |
1914 | bfd *abfd; | |
1915 | asection *s; | |
1916 | char *buffer, srec[1024]; | |
1917 | int i; | |
1918 | int srec_frame = 200; | |
1919 | int reclen; | |
1920 | static int hashmark = 1; | |
1921 | ||
1922 | buffer = alloca (srec_frame * 2 + 256); | |
1923 | ||
1924 | abfd = bfd_openr (args, 0); | |
1925 | if (!abfd) | |
1926 | { | |
1927 | printf_filtered ("Unable to open file %s\n", args); | |
1928 | return; | |
1929 | } | |
1930 | ||
1931 | if (bfd_check_format (abfd, bfd_object) == 0) | |
1932 | { | |
1933 | printf_filtered ("File is not an object file\n"); | |
1934 | return; | |
1935 | } | |
1936 | ||
1937 | #define LOAD_CMD "load -b -s tty0\015" | |
1938 | ||
1939 | SERIAL_WRITE (mips_desc, LOAD_CMD, sizeof LOAD_CMD - 1); | |
1940 | ||
1941 | mips_expect (LOAD_CMD); | |
1942 | mips_expect ("\012"); | |
1943 | ||
1944 | for (s = abfd->sections; s; s = s->next) | |
1945 | { | |
1946 | if (s->flags & SEC_LOAD) | |
1947 | { | |
1948 | int numbytes; | |
1949 | ||
1950 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma, | |
1951 | s->vma + s->_raw_size); | |
1952 | gdb_flush (gdb_stdout); | |
1953 | ||
1954 | for (i = 0; i < s->_raw_size; i += numbytes) | |
1955 | { | |
1956 | numbytes = min (srec_frame, s->_raw_size - i); | |
1957 | ||
1958 | bfd_get_section_contents (abfd, s, buffer, i, numbytes); | |
1959 | ||
1960 | reclen = mips_make_srec (srec, '3', s->vma + i, buffer, numbytes); | |
1961 | send_srec (srec, reclen, s->vma + i); | |
1962 | ||
1963 | if (hashmark) | |
1964 | { | |
1965 | putchar_unfiltered ('#'); | |
1966 | gdb_flush (gdb_stdout); | |
1967 | } | |
1968 | ||
1969 | } /* Per-packet (or S-record) loop */ | |
1970 | ||
1971 | putchar_unfiltered ('\n'); | |
1972 | } /* Loadable sections */ | |
1973 | } | |
1974 | if (hashmark) | |
1975 | putchar_unfiltered ('\n'); | |
1976 | ||
1977 | /* Write a type 7 terminator record. no data for a type 7, and there | |
1978 | is no data, so len is 0. */ | |
1979 | ||
1980 | reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0); | |
1981 | ||
1982 | send_srec (srec, reclen, abfd->start_address); | |
1983 | ||
1984 | SERIAL_FLUSH_INPUT (mips_desc); | |
1985 | } | |
1986 | ||
1987 | /* | |
1988 | * mips_make_srec -- make an srecord. This writes each line, one at a | |
1989 | * time, each with it's own header and trailer line. | |
1990 | * An srecord looks like this: | |
1991 | * | |
1992 | * byte count-+ address | |
1993 | * start ---+ | | data +- checksum | |
1994 | * | | | | | |
1995 | * S01000006F6B692D746573742E73726563E4 | |
1996 | * S315000448600000000000000000FC00005900000000E9 | |
1997 | * S31A0004000023C1400037DE00F023604000377B009020825000348D | |
1998 | * S30B0004485A0000000000004E | |
1999 | * S70500040000F6 | |
2000 | * | |
2001 | * S<type><length><address><data><checksum> | |
2002 | * | |
2003 | * Where | |
2004 | * - length | |
2005 | * is the number of bytes following upto the checksum. Note that | |
2006 | * this is not the number of chars following, since it takes two | |
2007 | * chars to represent a byte. | |
2008 | * - type | |
2009 | * is one of: | |
2010 | * 0) header record | |
2011 | * 1) two byte address data record | |
2012 | * 2) three byte address data record | |
2013 | * 3) four byte address data record | |
2014 | * 7) four byte address termination record | |
2015 | * 8) three byte address termination record | |
2016 | * 9) two byte address termination record | |
2017 | * | |
2018 | * - address | |
2019 | * is the start address of the data following, or in the case of | |
2020 | * a termination record, the start address of the image | |
2021 | * - data | |
2022 | * is the data. | |
2023 | * - checksum | |
2024 | * is the sum of all the raw byte data in the record, from the length | |
2025 | * upwards, modulo 256 and subtracted from 255. | |
2026 | * | |
2027 | * This routine returns the length of the S-record. | |
2028 | * | |
2029 | */ | |
2030 | ||
2031 | static int | |
2032 | mips_make_srec (buf, type, memaddr, myaddr, len) | |
2033 | char *buf; | |
cd10c7e3 | 2034 | int type; |
4704fd9c SG |
2035 | CORE_ADDR memaddr; |
2036 | unsigned char *myaddr; | |
2037 | int len; | |
2038 | { | |
2039 | unsigned char checksum; | |
2040 | int i; | |
2041 | ||
2042 | /* Create the header for the srec. addr_size is the number of bytes in the address, | |
2043 | and 1 is the number of bytes in the count. */ | |
2044 | ||
2045 | buf[0] = 'S'; | |
2046 | buf[1] = type; | |
2047 | buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */ | |
2048 | buf[3] = memaddr >> 24; | |
2049 | buf[4] = memaddr >> 16; | |
2050 | buf[5] = memaddr >> 8; | |
2051 | buf[6] = memaddr; | |
2052 | memcpy (&buf[7], myaddr, len); | |
2053 | ||
2054 | /* Note that the checksum is calculated on the raw data, not the hexified | |
2055 | data. It includes the length, address and the data portions of the | |
2056 | packet. */ | |
2057 | ||
2058 | checksum = 0; | |
2059 | buf += 2; /* Point at length byte */ | |
2060 | for (i = 0; i < len + 4 + 1; i++) | |
2061 | checksum += *buf++; | |
2062 | ||
2063 | *buf = ~checksum; | |
2064 | ||
2065 | return len + 8; | |
2066 | } | |
2067 | ||
2068 | /* mips_load -- download a file. */ | |
2069 | ||
2070 | static void | |
2071 | mips_load (file, from_tty) | |
2072 | char *file; | |
2073 | int from_tty; | |
2074 | { | |
2075 | int err; | |
2076 | ||
2077 | /* Get the board out of remote debugging mode. */ | |
2078 | ||
2079 | mips_request ('x', (unsigned int) 0, (unsigned int) 0, &err, | |
cd10c7e3 | 2080 | mips_receive_wait, NULL); |
4704fd9c | 2081 | |
cd10c7e3 | 2082 | if (!mips_expect ("\015\012") || !mips_expect (TARGET_MONITOR_PROMPT)) |
4704fd9c SG |
2083 | error ("mips_load: Couldn't get into monitor mode."); |
2084 | ||
2085 | mips_load_srec (file); | |
2086 | ||
4704fd9c SG |
2087 | mips_initialize (); |
2088 | ||
2089 | /* Finally, make the PC point at the start address */ | |
2090 | ||
2091 | if (exec_bfd) | |
2092 | write_pc (bfd_get_start_address (exec_bfd)); | |
2093 | ||
2094 | inferior_pid = 0; /* No process now */ | |
2095 | ||
2096 | /* This is necessary because many things were based on the PC at the time that | |
2097 | we attached to the monitor, which is no longer valid now that we have loaded | |
2098 | new code (and just changed the PC). Another way to do this might be to call | |
2099 | normal_stop, except that the stack may not be valid, and things would get | |
2100 | horribly confused... */ | |
2101 | ||
2102 | clear_symtab_users (); | |
2103 | } | |
aa56c716 | 2104 | \f |
33742334 ILT |
2105 | /* The target vector. */ |
2106 | ||
2107 | struct target_ops mips_ops = | |
2108 | { | |
2109 | "mips", /* to_shortname */ | |
2110 | "Remote MIPS debugging over serial line", /* to_longname */ | |
796d1fd3 JK |
2111 | "\ |
2112 | Debug a board using the MIPS remote debugging protocol over a serial line.\n\ | |
2113 | The argument is the device it is connected to or, if it contains a colon,\n\ | |
2114 | HOST:PORT to access a board over a network", /* to_doc */ | |
33742334 ILT |
2115 | mips_open, /* to_open */ |
2116 | mips_close, /* to_close */ | |
2117 | NULL, /* to_attach */ | |
2118 | mips_detach, /* to_detach */ | |
2119 | mips_resume, /* to_resume */ | |
2120 | mips_wait, /* to_wait */ | |
2121 | mips_fetch_registers, /* to_fetch_registers */ | |
2122 | mips_store_registers, /* to_store_registers */ | |
2123 | mips_prepare_to_store, /* to_prepare_to_store */ | |
2124 | mips_xfer_memory, /* to_xfer_memory */ | |
2125 | mips_files_info, /* to_files_info */ | |
aa56c716 JK |
2126 | mips_insert_breakpoint, /* to_insert_breakpoint */ |
2127 | mips_remove_breakpoint, /* to_remove_breakpoint */ | |
33742334 ILT |
2128 | NULL, /* to_terminal_init */ |
2129 | NULL, /* to_terminal_inferior */ | |
2130 | NULL, /* to_terminal_ours_for_output */ | |
2131 | NULL, /* to_terminal_ours */ | |
2132 | NULL, /* to_terminal_info */ | |
c2a0f1cb | 2133 | mips_kill, /* to_kill */ |
4704fd9c | 2134 | mips_load, /* to_load */ |
33742334 ILT |
2135 | NULL, /* to_lookup_symbol */ |
2136 | mips_create_inferior, /* to_create_inferior */ | |
2137 | mips_mourn_inferior, /* to_mourn_inferior */ | |
2138 | NULL, /* to_can_run */ | |
2139 | NULL, /* to_notice_signals */ | |
43fc25c8 | 2140 | 0, /* to_thread_alive */ |
78b459a7 | 2141 | 0, /* to_stop */ |
33742334 ILT |
2142 | process_stratum, /* to_stratum */ |
2143 | NULL, /* to_next */ | |
2144 | 1, /* to_has_all_memory */ | |
2145 | 1, /* to_has_memory */ | |
2146 | 1, /* to_has_stack */ | |
2147 | 1, /* to_has_registers */ | |
2148 | 1, /* to_has_execution */ | |
2149 | NULL, /* sections */ | |
2150 | NULL, /* sections_end */ | |
2151 | OPS_MAGIC /* to_magic */ | |
2152 | }; | |
2153 | \f | |
2154 | void | |
2155 | _initialize_remote_mips () | |
2156 | { | |
2157 | add_target (&mips_ops); | |
2158 | ||
0907dc09 ILT |
2159 | add_show_from_set ( |
2160 | add_set_cmd ("timeout", no_class, var_zinteger, | |
2161 | (char *) &mips_receive_wait, | |
2162 | "Set timeout in seconds for remote MIPS serial I/O.", | |
2163 | &setlist), | |
2164 | &showlist); | |
2165 | ||
2166 | add_show_from_set ( | |
2167 | add_set_cmd ("retransmit-timeout", no_class, var_zinteger, | |
2168 | (char *) &mips_retransmit_wait, | |
2169 | "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\ | |
2170 | This is the number of seconds to wait for an acknowledgement to a packet\n\ | |
2171 | before resending the packet.", &setlist), | |
2172 | &showlist); | |
4c5bc9f4 SG |
2173 | |
2174 | add_show_from_set ( | |
2175 | add_set_cmd ("syn-garbage-limit", no_class, var_zinteger, | |
2176 | (char *) &mips_syn_garbage, | |
2177 | "Set the maximum number of characters to ignore when scanning for a SYN.\n\ | |
2178 | This is the maximum number of characters GDB will ignore when trying to\n\ | |
2179 | synchronize with the remote system. A value of -1 means that there is no limit\n\ | |
2180 | (Note that these characters are printed out even though they are ignored.)", | |
2181 | &setlist), | |
2182 | &showlist); | |
33742334 | 2183 | } |