Commit | Line | Data |
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dd3b648e RP |
1 | /* Remote debugging interface for AMD 29000 EBMON on IBM PC, for GDB. |
2 | Copyright 1990-1991 Free Software Foundation, Inc. | |
3 | Contributed by Cygnus Support. Written by Jim Kingdon for Cygnus. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 1, or (at your option) | |
10 | any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
21 | /* This is like remote.c but is for an esoteric situation-- | |
22 | having a 29k board in a PC hooked up to a unix machine with | |
23 | a serial line, and running ctty com1 on the PC, through which | |
24 | the unix machine can run ebmon. Not to mention that the PC | |
25 | has PC/NFS, so it can access the same executables that gdb can, | |
26 | over the net in real time. */ | |
27 | ||
28 | #include <stdio.h> | |
29 | #include <string.h> | |
30 | #include "defs.h" | |
31 | #include "tm-29k.h" | |
32 | #include "param-no-tm.h" | |
33 | #include "inferior.h" | |
34 | #include "wait.h" | |
35 | #include "value.h" | |
36 | #include <ctype.h> | |
37 | #include <fcntl.h> | |
38 | #include <signal.h> | |
39 | #include <errno.h> | |
40 | #include "terminal.h" | |
41 | #include "target.h" | |
42 | ||
43 | extern void add_syms_addr_command (); | |
44 | extern struct value *call_function_by_hand(); | |
45 | ||
46 | extern struct target_ops eb_ops; /* Forward declaration */ | |
47 | ||
48 | #define LOG_FILE "eb.log" | |
49 | #if defined (LOG_FILE) | |
50 | FILE *log_file; | |
51 | #endif | |
52 | ||
53 | static int timeout = 5; | |
54 | ||
55 | /* Descriptor for I/O to remote machine. Initialize it to -1 so that | |
56 | eb_open knows that we don't have a file open when the program | |
57 | starts. */ | |
58 | int eb_desc = -1; | |
59 | ||
60 | /* stream which is fdopen'd from eb_desc. Only valid when | |
61 | eb_desc != -1. */ | |
62 | FILE *eb_stream; | |
63 | ||
64 | /* Read a character from the remote system, doing all the fancy | |
65 | timeout stuff. */ | |
66 | static int | |
67 | readchar () | |
68 | { | |
69 | char buf; | |
70 | ||
71 | buf = '\0'; | |
72 | #ifdef HAVE_TERMIO | |
73 | /* termio does the timeout for us. */ | |
74 | read (eb_desc, &buf, 1); | |
75 | #else | |
76 | alarm (timeout); | |
77 | if (read (eb_desc, &buf, 1) < 0) | |
78 | { | |
79 | if (errno == EINTR) | |
80 | error ("Timeout reading from remote system."); | |
81 | else | |
82 | perror_with_name ("remote"); | |
83 | } | |
84 | alarm (0); | |
85 | #endif | |
86 | ||
87 | if (buf == '\0') | |
88 | error ("Timeout reading from remote system."); | |
89 | #if defined (LOG_FILE) | |
90 | putc (buf & 0x7f, log_file); | |
91 | #endif | |
92 | return buf & 0x7f; | |
93 | } | |
94 | ||
95 | /* Keep discarding input from the remote system, until STRING is found. | |
96 | Let the user break out immediately. */ | |
97 | static void | |
98 | expect (string) | |
99 | char *string; | |
100 | { | |
101 | char *p = string; | |
102 | ||
103 | immediate_quit = 1; | |
104 | while (1) | |
105 | { | |
106 | if (readchar() == *p) | |
107 | { | |
108 | p++; | |
109 | if (*p == '\0') | |
110 | { | |
111 | immediate_quit = 0; | |
112 | return; | |
113 | } | |
114 | } | |
115 | else | |
116 | p = string; | |
117 | } | |
118 | } | |
119 | ||
120 | /* Keep discarding input until we see the ebmon prompt. | |
121 | ||
122 | The convention for dealing with the prompt is that you | |
123 | o give your command | |
124 | o *then* wait for the prompt. | |
125 | ||
126 | Thus the last thing that a procedure does with the serial line | |
127 | will be an expect_prompt(). Exception: eb_resume does not | |
128 | wait for the prompt, because the terminal is being handed over | |
129 | to the inferior. However, the next thing which happens after that | |
130 | is a eb_wait which does wait for the prompt. | |
131 | Note that this includes abnormal exit, e.g. error(). This is | |
132 | necessary to prevent getting into states from which we can't | |
133 | recover. */ | |
134 | static void | |
135 | expect_prompt () | |
136 | { | |
137 | #if defined (LOG_FILE) | |
138 | /* This is a convenient place to do this. The idea is to do it often | |
139 | enough that we never lose much data if we terminate abnormally. */ | |
140 | fflush (log_file); | |
141 | #endif | |
142 | expect ("\n# "); | |
143 | } | |
144 | ||
145 | /* Get a hex digit from the remote system & return its value. | |
146 | If ignore_space is nonzero, ignore spaces (not newline, tab, etc). */ | |
147 | static int | |
148 | get_hex_digit (ignore_space) | |
149 | int ignore_space; | |
150 | { | |
151 | int ch; | |
152 | while (1) | |
153 | { | |
154 | ch = readchar (); | |
155 | if (ch >= '0' && ch <= '9') | |
156 | return ch - '0'; | |
157 | else if (ch >= 'A' && ch <= 'F') | |
158 | return ch - 'A' + 10; | |
159 | else if (ch >= 'a' && ch <= 'f') | |
160 | return ch - 'a' + 10; | |
161 | else if (ch == ' ' && ignore_space) | |
162 | ; | |
163 | else | |
164 | { | |
165 | expect_prompt (); | |
166 | error ("Invalid hex digit from remote system."); | |
167 | } | |
168 | } | |
169 | } | |
170 | ||
171 | /* Get a byte from eb_desc and put it in *BYT. Accept any number | |
172 | leading spaces. */ | |
173 | static void | |
174 | get_hex_byte (byt) | |
175 | char *byt; | |
176 | { | |
177 | int val; | |
178 | ||
179 | val = get_hex_digit (1) << 4; | |
180 | val |= get_hex_digit (0); | |
181 | *byt = val; | |
182 | } | |
183 | ||
184 | /* Get N 32-bit words from remote, each preceded by a space, | |
185 | and put them in registers starting at REGNO. */ | |
186 | static void | |
187 | get_hex_regs (n, regno) | |
188 | int n; | |
189 | int regno; | |
190 | { | |
191 | long val; | |
192 | int i; | |
193 | ||
194 | for (i = 0; i < n; i++) | |
195 | { | |
196 | int j; | |
197 | ||
198 | val = 0; | |
199 | for (j = 0; j < 8; j++) | |
200 | val = (val << 4) + get_hex_digit (j == 0); | |
201 | supply_register (regno++, &val); | |
202 | } | |
203 | } | |
204 | ||
205 | /* Called when SIGALRM signal sent due to alarm() timeout. */ | |
206 | #ifndef HAVE_TERMIO | |
207 | ||
208 | #ifndef __STDC__ | |
209 | #define volatile /**/ | |
210 | #endif | |
211 | volatile int n_alarms; | |
212 | ||
213 | void | |
214 | eb_timer () | |
215 | { | |
216 | #if 0 | |
217 | if (kiodebug) | |
218 | printf ("eb_timer called\n"); | |
219 | #endif | |
220 | n_alarms++; | |
221 | } | |
222 | #endif | |
223 | ||
224 | /* malloc'd name of the program on the remote system. */ | |
225 | static char *prog_name = NULL; | |
226 | ||
227 | /* Nonzero if we have loaded the file ("yc") and not yet issued a "gi" | |
228 | command. "gi" is supposed to happen exactly once for each "yc". */ | |
229 | static int need_gi = 0; | |
230 | ||
231 | /* Number of SIGTRAPs we need to simulate. That is, the next | |
232 | NEED_ARTIFICIAL_TRAP calls to eb_wait should just return | |
233 | SIGTRAP without actually waiting for anything. */ | |
234 | ||
235 | static int need_artificial_trap = 0; | |
236 | ||
237 | /* This is called not only when we first attach, but also when the | |
238 | user types "run" after having attached. */ | |
239 | void | |
240 | eb_start (inferior_args) | |
241 | char *inferior_args; | |
242 | { | |
243 | /* OK, now read in the file. Y=read, C=COFF, D=no symbols | |
244 | 0=start address, %s=filename. */ | |
245 | ||
246 | fprintf (eb_stream, "YC D,0:%s", prog_name); | |
247 | ||
248 | if (inferior_args != NULL) | |
249 | fprintf(eb_stream, " %s", inferior_args); | |
250 | ||
251 | fprintf (eb_stream, "\n"); | |
252 | fflush (eb_stream); | |
253 | ||
254 | expect_prompt (); | |
255 | ||
256 | need_gi = 1; | |
257 | } | |
258 | ||
259 | /* Translate baud rates from integers to damn B_codes. Unix should | |
260 | have outgrown this crap years ago, but even POSIX wouldn't buck it. */ | |
261 | ||
262 | #ifndef B19200 | |
263 | #define B19200 EXTA | |
264 | #endif | |
265 | #ifndef B38400 | |
266 | #define B38400 EXTB | |
267 | #endif | |
268 | ||
269 | struct {int rate, damn_b;} baudtab[] = { | |
270 | {0, B0}, | |
271 | {50, B50}, | |
272 | {75, B75}, | |
273 | {110, B110}, | |
274 | {134, B134}, | |
275 | {150, B150}, | |
276 | {200, B200}, | |
277 | {300, B300}, | |
278 | {600, B600}, | |
279 | {1200, B1200}, | |
280 | {1800, B1800}, | |
281 | {2400, B2400}, | |
282 | {4800, B4800}, | |
283 | {9600, B9600}, | |
284 | {19200, B19200}, | |
285 | {38400, B38400}, | |
286 | {-1, -1}, | |
287 | }; | |
288 | ||
289 | int damn_b (rate) | |
290 | int rate; | |
291 | { | |
292 | int i; | |
293 | ||
294 | for (i = 0; baudtab[i].rate != -1; i++) | |
295 | if (rate == baudtab[i].rate) return baudtab[i].damn_b; | |
296 | return B38400; /* Random */ | |
297 | } | |
298 | ||
299 | ||
300 | /* Open a connection to a remote debugger. | |
301 | NAME is the filename used for communication, then a space, | |
302 | then the name of the program as we should name it to EBMON. */ | |
303 | ||
304 | static int baudrate = 9600; | |
305 | static char *dev_name; | |
306 | void | |
307 | eb_open (name, from_tty) | |
308 | char *name; | |
309 | int from_tty; | |
310 | { | |
311 | TERMINAL sg; | |
312 | ||
313 | char *p; | |
314 | ||
315 | /* Find the first whitespace character, it separates dev_name from | |
316 | prog_name. */ | |
317 | if (name == 0) | |
318 | goto erroid; | |
319 | ||
320 | for (p = name; | |
321 | *p != '\0' && !isspace (*p); p++) | |
322 | ; | |
323 | if (*p == '\0') | |
324 | erroid: | |
325 | error ("\ | |
326 | Please include the name of the device for the serial port,\n\ | |
327 | the baud rate, and the name of the program to run on the remote system."); | |
328 | dev_name = alloca (p - name + 1); | |
329 | strncpy (dev_name, name, p - name); | |
330 | dev_name[p - name] = '\0'; | |
331 | ||
332 | /* Skip over the whitespace after dev_name */ | |
333 | for (; isspace (*p); p++) | |
334 | /*EMPTY*/; | |
335 | ||
336 | if (1 != sscanf (p, "%d ", &baudrate)) | |
337 | goto erroid; | |
338 | ||
339 | /* Skip the number and then the spaces */ | |
340 | for (; isdigit (*p); p++) | |
341 | /*EMPTY*/; | |
342 | for (; isspace (*p); p++) | |
343 | /*EMPTY*/; | |
344 | ||
345 | if (prog_name != NULL) | |
346 | free (prog_name); | |
347 | prog_name = savestring (p, strlen (p)); | |
348 | ||
349 | eb_close (0); | |
350 | ||
351 | eb_desc = open (dev_name, O_RDWR); | |
352 | if (eb_desc < 0) | |
353 | perror_with_name (dev_name); | |
354 | ioctl (eb_desc, TIOCGETP, &sg); | |
355 | #ifdef HAVE_TERMIO | |
356 | sg.c_cc[VMIN] = 0; /* read with timeout. */ | |
357 | sg.c_cc[VTIME] = timeout * 10; | |
358 | sg.c_lflag &= ~(ICANON | ECHO); | |
359 | sg.c_cflag = (sg.c_cflag & ~CBAUD) | damn_b (baudrate); | |
360 | #else | |
361 | sg.sg_ispeed = damn_b (baudrate); | |
362 | sg.sg_ospeed = damn_b (baudrate); | |
363 | sg.sg_flags |= RAW | ANYP; | |
364 | sg.sg_flags &= ~ECHO; | |
365 | #endif | |
366 | ||
367 | ioctl (eb_desc, TIOCSETP, &sg); | |
368 | eb_stream = fdopen (eb_desc, "r+"); | |
369 | ||
370 | push_target (&eb_ops); | |
371 | if (from_tty) | |
372 | printf ("Remote %s debugging %s using %s\n", target_shortname, | |
373 | prog_name, dev_name); | |
374 | ||
375 | #ifndef HAVE_TERMIO | |
376 | #ifndef NO_SIGINTERRUPT | |
377 | /* Cause SIGALRM's to make reads fail with EINTR instead of resuming | |
378 | the read. */ | |
379 | if (siginterrupt (SIGALRM, 1) != 0) | |
380 | perror ("eb_open: error in siginterrupt"); | |
381 | #endif | |
382 | ||
383 | /* Set up read timeout timer. */ | |
384 | if ((void (*)) signal (SIGALRM, eb_timer) == (void (*)) -1) | |
385 | perror ("eb_open: error in signal"); | |
386 | #endif | |
387 | ||
388 | #if defined (LOG_FILE) | |
389 | log_file = fopen (LOG_FILE, "w"); | |
390 | if (log_file == NULL) | |
391 | perror_with_name (LOG_FILE); | |
392 | #endif | |
393 | ||
394 | /* Hello? Are you there? */ | |
395 | write (eb_desc, "\n", 1); | |
396 | ||
397 | expect_prompt (); | |
398 | } | |
399 | ||
400 | /* Close out all files and local state before this target loses control. */ | |
401 | ||
402 | void | |
403 | eb_close (quitting) | |
404 | int quitting; | |
405 | { | |
406 | ||
407 | /* Due to a bug in Unix, fclose closes not only the stdio stream, | |
408 | but also the file descriptor. So we don't actually close | |
409 | eb_desc. */ | |
410 | if (eb_stream) | |
411 | fclose (eb_stream); /* This also closes eb_desc */ | |
412 | if (eb_desc >= 0) | |
413 | /* close (eb_desc); */ | |
414 | ||
415 | /* Do not try to close eb_desc again, later in the program. */ | |
416 | eb_stream = NULL; | |
417 | eb_desc = -1; | |
418 | ||
419 | #if defined (LOG_FILE) | |
420 | if (ferror (log_file)) | |
421 | printf ("Error writing log file.\n"); | |
422 | if (fclose (log_file) != 0) | |
423 | printf ("Error closing log file.\n"); | |
424 | #endif | |
425 | } | |
426 | ||
427 | /* Terminate the open connection to the remote debugger. | |
428 | Use this when you want to detach and do something else | |
429 | with your gdb. */ | |
430 | void | |
431 | eb_detach (from_tty) | |
432 | int from_tty; | |
433 | { | |
434 | pop_target(); /* calls eb_close to do the real work */ | |
435 | if (from_tty) | |
436 | printf ("Ending remote %s debugging\n", target_shortname); | |
437 | } | |
438 | ||
439 | /* Tell the remote machine to resume. */ | |
440 | ||
441 | void | |
442 | eb_resume (step, sig) | |
443 | int step, sig; | |
444 | { | |
445 | if (step) | |
446 | { | |
447 | write (eb_desc, "t 1,s\n", 6); | |
448 | /* Wait for the echo. */ | |
449 | expect ("t 1,s\r"); | |
450 | /* Then comes a line containing the instruction we stepped to. */ | |
451 | expect ("\n@"); | |
452 | /* Then we get the prompt. */ | |
453 | expect_prompt (); | |
454 | ||
455 | /* Force the next eb_wait to return a trap. Not doing anything | |
456 | about I/O from the target means that the user has to type | |
457 | "continue" to see any. This should be fixed. */ | |
458 | need_artificial_trap = 1; | |
459 | } | |
460 | else | |
461 | { | |
462 | if (need_gi) | |
463 | { | |
464 | need_gi = 0; | |
465 | write (eb_desc, "gi\n", 3); | |
466 | ||
467 | /* Swallow the echo of "gi". */ | |
468 | expect ("gi\r"); | |
469 | } | |
470 | else | |
471 | { | |
472 | write (eb_desc, "GR\n", 3); | |
473 | /* Swallow the echo. */ | |
474 | expect ("GR\r"); | |
475 | } | |
476 | } | |
477 | } | |
478 | ||
479 | /* Wait until the remote machine stops, then return, | |
480 | storing status in STATUS just as `wait' would. */ | |
481 | ||
482 | int | |
483 | eb_wait (status) | |
484 | WAITTYPE *status; | |
485 | { | |
486 | /* Strings to look for. '?' means match any single character. | |
487 | Note that with the algorithm we use, the initial character | |
488 | of the string cannot recur in the string, or we will not | |
489 | find some cases of the string in the input. */ | |
490 | ||
491 | static char bpt[] = "Invalid interrupt taken - #0x50 - "; | |
492 | /* It would be tempting to look for "\n[__exit + 0x8]\n" | |
493 | but that requires loading symbols with "yc i" and even if | |
494 | we did do that we don't know that the file has symbols. */ | |
495 | static char exitmsg[] = "\n@????????I JMPTI GR121,LR0"; | |
496 | char *bp = bpt; | |
497 | char *ep = exitmsg; | |
498 | ||
499 | /* Large enough for either sizeof (bpt) or sizeof (exitmsg) chars. */ | |
500 | char swallowed[50]; | |
501 | /* Current position in swallowed. */ | |
502 | char *swallowed_p = swallowed; | |
503 | ||
504 | int ch; | |
505 | int ch_handled; | |
506 | ||
507 | int old_timeout = timeout; | |
508 | ||
509 | WSETEXIT ((*status), 0); | |
510 | ||
511 | if (need_artificial_trap != 0) | |
512 | { | |
513 | WSETSTOP ((*status), SIGTRAP); | |
514 | need_artificial_trap--; | |
515 | return 0; | |
516 | } | |
517 | ||
518 | timeout = 0; /* Don't time out -- user program is running. */ | |
519 | while (1) | |
520 | { | |
521 | ch_handled = 0; | |
522 | ch = readchar (); | |
523 | if (ch == *bp) | |
524 | { | |
525 | bp++; | |
526 | if (*bp == '\0') | |
527 | break; | |
528 | ch_handled = 1; | |
529 | ||
530 | *swallowed_p++ = ch; | |
531 | } | |
532 | else | |
533 | bp = bpt; | |
534 | ||
535 | if (ch == *ep || *ep == '?') | |
536 | { | |
537 | ep++; | |
538 | if (*ep == '\0') | |
539 | break; | |
540 | ||
541 | if (!ch_handled) | |
542 | *swallowed_p++ = ch; | |
543 | ch_handled = 1; | |
544 | } | |
545 | else | |
546 | ep = exitmsg; | |
547 | ||
548 | if (!ch_handled) | |
549 | { | |
550 | char *p; | |
551 | ||
552 | /* Print out any characters which have been swallowed. */ | |
553 | for (p = swallowed; p < swallowed_p; ++p) | |
554 | putc (*p, stdout); | |
555 | swallowed_p = swallowed; | |
556 | ||
557 | putc (ch, stdout); | |
558 | } | |
559 | } | |
560 | expect_prompt (); | |
561 | if (*bp== '\0') | |
562 | WSETSTOP ((*status), SIGTRAP); | |
563 | else | |
564 | WSETEXIT ((*status), 0); | |
565 | timeout = old_timeout; | |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
570 | /* Return the name of register number REGNO | |
571 | in the form input and output by EBMON. | |
572 | ||
573 | Returns a pointer to a static buffer containing the answer. */ | |
574 | static char * | |
575 | get_reg_name (regno) | |
576 | int regno; | |
577 | { | |
578 | static char buf[80]; | |
579 | if (regno >= GR96_REGNUM && regno < GR96_REGNUM + 32) | |
580 | sprintf (buf, "GR%03d", regno - GR96_REGNUM + 96); | |
581 | else if (regno >= LR0_REGNUM && regno < LR0_REGNUM + 128) | |
582 | sprintf (buf, "LR%03d", regno - LR0_REGNUM); | |
583 | else if (regno == Q_REGNUM) | |
584 | strcpy (buf, "SR131"); | |
585 | else if (regno >= BP_REGNUM && regno <= CR_REGNUM) | |
586 | sprintf (buf, "SR%03d", regno - BP_REGNUM + 133); | |
587 | else if (regno == ALU_REGNUM) | |
588 | strcpy (buf, "SR132"); | |
589 | else if (regno >= IPC_REGNUM && regno <= IPB_REGNUM) | |
590 | sprintf (buf, "SR%03d", regno - IPC_REGNUM + 128); | |
591 | else if (regno >= VAB_REGNUM && regno <= LRU_REGNUM) | |
592 | sprintf (buf, "SR%03d", regno - VAB_REGNUM); | |
593 | else if (regno == GR1_REGNUM) | |
594 | strcpy (buf, "GR001"); | |
595 | return buf; | |
596 | } | |
597 | ||
598 | /* Read the remote registers into the block REGS. */ | |
599 | ||
600 | static void | |
601 | eb_fetch_registers () | |
602 | { | |
603 | int reg_index; | |
604 | int regnum_index; | |
605 | char tempbuf[10]; | |
606 | int i; | |
607 | ||
608 | #if 0 | |
609 | /* This should not be necessary, because one is supposed to read the | |
610 | registers only when the inferior is stopped (at least with | |
611 | ptrace() and why not make it the same for remote?). */ | |
612 | /* ^A is the "normal character" used to make sure we are talking to EBMON | |
613 | and not to the program being debugged. */ | |
614 | write (eb_desc, "\001\n"); | |
615 | expect_prompt (); | |
616 | #endif | |
617 | ||
618 | write (eb_desc, "dw gr96,gr127\n", 14); | |
619 | for (reg_index = 96, regnum_index = GR96_REGNUM; | |
620 | reg_index < 128; | |
621 | reg_index += 4, regnum_index += 4) | |
622 | { | |
623 | sprintf (tempbuf, "GR%03d ", reg_index); | |
624 | expect (tempbuf); | |
625 | get_hex_regs (4, regnum_index); | |
626 | expect ("\n"); | |
627 | } | |
628 | ||
629 | for (i = 0; i < 128; i += 32) | |
630 | { | |
631 | /* The PC has a tendency to hang if we get these | |
632 | all in one fell swoop ("dw lr0,lr127"). */ | |
633 | sprintf (tempbuf, "dw lr%d\n", i); | |
634 | write (eb_desc, tempbuf, strlen (tempbuf)); | |
635 | for (reg_index = i, regnum_index = LR0_REGNUM + i; | |
636 | reg_index < i + 32; | |
637 | reg_index += 4, regnum_index += 4) | |
638 | { | |
639 | sprintf (tempbuf, "LR%03d ", reg_index); | |
640 | expect (tempbuf); | |
641 | get_hex_regs (4, regnum_index); | |
642 | expect ("\n"); | |
643 | } | |
644 | } | |
645 | ||
646 | write (eb_desc, "dw sr133,sr133\n", 15); | |
647 | expect ("SR133 "); | |
648 | get_hex_regs (1, BP_REGNUM); | |
649 | expect ("\n"); | |
650 | ||
651 | write (eb_desc, "dw sr134,sr134\n", 15); | |
652 | expect ("SR134 "); | |
653 | get_hex_regs (1, FC_REGNUM); | |
654 | expect ("\n"); | |
655 | ||
656 | write (eb_desc, "dw sr135,sr135\n", 15); | |
657 | expect ("SR135 "); | |
658 | get_hex_regs (1, CR_REGNUM); | |
659 | expect ("\n"); | |
660 | ||
661 | write (eb_desc, "dw sr131,sr131\n", 15); | |
662 | expect ("SR131 "); | |
663 | get_hex_regs (1, Q_REGNUM); | |
664 | expect ("\n"); | |
665 | ||
666 | write (eb_desc, "dw sr0,sr14\n", 12); | |
667 | for (reg_index = 0, regnum_index = VAB_REGNUM; | |
668 | regnum_index <= LRU_REGNUM; | |
669 | regnum_index += 4, reg_index += 4) | |
670 | { | |
671 | sprintf (tempbuf, "SR%03d ", reg_index); | |
672 | expect (tempbuf); | |
673 | get_hex_regs (reg_index == 12 ? 3 : 4, regnum_index); | |
674 | expect ("\n"); | |
675 | } | |
676 | ||
677 | /* There doesn't seem to be any way to get these. */ | |
678 | { | |
679 | int val = -1; | |
680 | supply_register (FPE_REGNUM, &val); | |
681 | supply_register (INT_REGNUM, &val); | |
682 | supply_register (FPS_REGNUM, &val); | |
683 | supply_register (EXO_REGNUM, &val); | |
684 | } | |
685 | ||
686 | write (eb_desc, "dw gr1,gr1\n", 11); | |
687 | expect ("GR001 "); | |
688 | get_hex_regs (1, GR1_REGNUM); | |
689 | expect_prompt (); | |
690 | } | |
691 | ||
692 | /* Fetch register REGNO, or all registers if REGNO is -1. | |
693 | Returns errno value. */ | |
694 | int | |
695 | eb_fetch_register (regno) | |
696 | int regno; | |
697 | { | |
698 | if (regno == -1) | |
699 | eb_fetch_registers (); | |
700 | else | |
701 | { | |
702 | char *name = get_reg_name (regno); | |
703 | fprintf (eb_stream, "dw %s,%s\n", name, name); | |
704 | expect (name); | |
705 | expect (" "); | |
706 | get_hex_regs (1, regno); | |
707 | expect_prompt (); | |
708 | } | |
709 | return 0; | |
710 | } | |
711 | ||
712 | /* Store the remote registers from the contents of the block REGS. */ | |
713 | ||
714 | static void | |
715 | eb_store_registers () | |
716 | { | |
717 | int i, j; | |
718 | fprintf (eb_stream, "s gr1,%x\n", read_register (GR1_REGNUM)); | |
719 | expect_prompt (); | |
720 | ||
721 | for (j = 0; j < 32; j += 16) | |
722 | { | |
723 | fprintf (eb_stream, "s gr%d,", j + 96); | |
724 | for (i = 0; i < 15; ++i) | |
725 | fprintf (eb_stream, "%x,", read_register (GR96_REGNUM + j + i)); | |
726 | fprintf (eb_stream, "%x\n", read_register (GR96_REGNUM + j + 15)); | |
727 | expect_prompt (); | |
728 | } | |
729 | ||
730 | for (j = 0; j < 128; j += 16) | |
731 | { | |
732 | fprintf (eb_stream, "s lr%d,", j); | |
733 | for (i = 0; i < 15; ++i) | |
734 | fprintf (eb_stream, "%x,", read_register (LR0_REGNUM + j + i)); | |
735 | fprintf (eb_stream, "%x\n", read_register (LR0_REGNUM + j + 15)); | |
736 | expect_prompt (); | |
737 | } | |
738 | ||
739 | fprintf (eb_stream, "s sr133,%x,%x,%x\n", read_register (BP_REGNUM), | |
740 | read_register (FC_REGNUM), read_register (CR_REGNUM)); | |
741 | expect_prompt (); | |
742 | fprintf (eb_stream, "s sr131,%x\n", read_register (Q_REGNUM)); | |
743 | expect_prompt (); | |
744 | fprintf (eb_stream, "s sr0,"); | |
745 | for (i = 0; i < 11; ++i) | |
746 | fprintf (eb_stream, "%x,", read_register (VAB_REGNUM + i)); | |
747 | fprintf (eb_stream, "%x\n", read_register (VAB_REGNUM + 11)); | |
748 | expect_prompt (); | |
749 | } | |
750 | ||
751 | /* Store register REGNO, or all if REGNO == 0. | |
752 | Return errno value. */ | |
753 | int | |
754 | eb_store_register (regno) | |
755 | int regno; | |
756 | { | |
757 | if (regno == -1) | |
758 | eb_store_registers (); | |
759 | else | |
760 | { | |
761 | char *name = get_reg_name (regno); | |
762 | fprintf (eb_stream, "s %s,%x\n", name, read_register (regno)); | |
763 | /* Setting GR1 changes the numbers of all the locals, so | |
764 | invalidate the register cache. Do this *after* calling | |
765 | read_register, because we want read_register to return the | |
766 | value that write_register has just stuffed into the registers | |
767 | array, not the value of the register fetched from the | |
768 | inferior. */ | |
769 | if (regno == GR1_REGNUM) | |
770 | registers_changed (); | |
771 | expect_prompt (); | |
772 | } | |
773 | return 0; | |
774 | } | |
775 | ||
776 | /* Get ready to modify the registers array. On machines which store | |
777 | individual registers, this doesn't need to do anything. On machines | |
778 | which store all the registers in one fell swoop, this makes sure | |
779 | that registers contains all the registers from the program being | |
780 | debugged. */ | |
781 | ||
782 | void | |
783 | eb_prepare_to_store () | |
784 | { | |
785 | /* Do nothing, since we can store individual regs */ | |
786 | } | |
787 | ||
788 | /* FIXME! Merge these two. */ | |
789 | int | |
790 | eb_xfer_inferior_memory (memaddr, myaddr, len, write) | |
791 | CORE_ADDR memaddr; | |
792 | char *myaddr; | |
793 | int len; | |
794 | int write; | |
795 | { | |
796 | if (write) | |
797 | return eb_write_inferior_memory (memaddr, myaddr, len); | |
798 | else | |
799 | return eb_write_inferior_memory (memaddr, myaddr, len); | |
800 | } | |
801 | ||
802 | void | |
803 | eb_files_info () | |
804 | { | |
805 | printf ("\tAttached to %s at %d baud and running program %s.\n", | |
806 | dev_name, baudrate, prog_name); | |
807 | } | |
808 | ||
809 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
810 | to inferior's memory at MEMADDR. Returns errno value. */ | |
811 | int | |
812 | eb_write_inferior_memory (memaddr, myaddr, len) | |
813 | CORE_ADDR memaddr; | |
814 | char *myaddr; | |
815 | int len; | |
816 | { | |
817 | int i; | |
818 | ||
819 | for (i = 0; i < len; i++) | |
820 | { | |
821 | if ((i % 16) == 0) | |
822 | fprintf (eb_stream, "sb %x,", memaddr + i); | |
823 | if ((i % 16) == 15 || i == len - 1) | |
824 | { | |
825 | fprintf (eb_stream, "%x\n", ((unsigned char *)myaddr)[i]); | |
826 | expect_prompt (); | |
827 | } | |
828 | else | |
829 | fprintf (eb_stream, "%x,", ((unsigned char *)myaddr)[i]); | |
830 | } | |
831 | return 0; | |
832 | } | |
833 | ||
834 | /* Read LEN bytes from inferior memory at MEMADDR. Put the result | |
835 | at debugger address MYADDR. Returns errno value. */ | |
836 | int | |
837 | eb_read_inferior_memory(memaddr, myaddr, len) | |
838 | CORE_ADDR memaddr; | |
839 | char *myaddr; | |
840 | int len; | |
841 | { | |
842 | int i; | |
843 | ||
844 | /* Number of bytes read so far. */ | |
845 | int count; | |
846 | ||
847 | /* Starting address of this pass. */ | |
848 | unsigned long startaddr; | |
849 | ||
850 | /* Number of bytes to read in this pass. */ | |
851 | int len_this_pass; | |
852 | ||
853 | /* Note that this code works correctly if startaddr is just less | |
854 | than UINT_MAX (well, really CORE_ADDR_MAX if there was such a | |
855 | thing). That is, something like | |
856 | eb_read_bytes (CORE_ADDR_MAX - 4, foo, 4) | |
857 | works--it never adds len to memaddr and gets 0. */ | |
858 | /* However, something like | |
859 | eb_read_bytes (CORE_ADDR_MAX - 3, foo, 4) | |
860 | doesn't need to work. Detect it and give up if there's an attempt | |
861 | to do that. */ | |
862 | if (((memaddr - 1) + len) < memaddr) | |
863 | return EIO; | |
864 | ||
865 | startaddr = memaddr; | |
866 | count = 0; | |
867 | while (count < len) | |
868 | { | |
869 | len_this_pass = 16; | |
870 | if ((startaddr % 16) != 0) | |
871 | len_this_pass -= startaddr % 16; | |
872 | if (len_this_pass > (len - count)) | |
873 | len_this_pass = (len - count); | |
874 | ||
875 | fprintf (eb_stream, "db %x,%x\n", startaddr, | |
876 | (startaddr - 1) + len_this_pass); | |
877 | expect ("\n"); | |
878 | ||
879 | /* Look for 8 hex digits. */ | |
880 | i = 0; | |
881 | while (1) | |
882 | { | |
883 | if (isxdigit (readchar ())) | |
884 | ++i; | |
885 | else | |
886 | { | |
887 | expect_prompt (); | |
888 | error ("Hex digit expected from remote system."); | |
889 | } | |
890 | if (i >= 8) | |
891 | break; | |
892 | } | |
893 | ||
894 | expect (" "); | |
895 | ||
896 | for (i = 0; i < len_this_pass; i++) | |
897 | get_hex_byte (&myaddr[count++]); | |
898 | ||
899 | expect_prompt (); | |
900 | ||
901 | startaddr += len_this_pass; | |
902 | } | |
903 | return 0; | |
904 | } | |
905 | ||
906 | /* Define the target subroutine names */ | |
907 | ||
908 | struct target_ops eb_ops = { | |
909 | "amd-eb", "Remote serial AMD EBMON target", | |
910 | eb_open, eb_close, | |
911 | 0, eb_detach, eb_resume, eb_wait, | |
912 | eb_fetch_register, eb_store_register, | |
913 | eb_prepare_to_store, 0, 0, /* conv_to, conv_from */ | |
914 | eb_xfer_inferior_memory, eb_files_info, | |
915 | 0, 0, /* Breakpoints */ | |
916 | 0, 0, 0, 0, 0, /* Terminal handling */ | |
917 | 0, /* FIXME, kill */ | |
918 | 0, add_syms_addr_command, /* load */ | |
919 | call_function_by_hand, | |
920 | 0, /* lookup_symbol */ | |
921 | 0, /* create_inferior FIXME, eb_start here or something? */ | |
922 | 0, /* mourn_inferior FIXME */ | |
923 | process_stratum, 0, /* next */ | |
924 | 1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */ | |
925 | OPS_MAGIC, /* Always the last thing */ | |
926 | }; | |
927 | ||
928 | void | |
929 | _initialize_remote_eb () | |
930 | { | |
931 | add_target (&eb_ops); | |
932 | } |