Commit | Line | Data |
---|---|---|
dd3b648e | 1 | /* Remote debugging interface for AMD 29000 EBMON on IBM PC, for GDB. |
e17960fb | 2 | Copyright 1990, 1991, 1992 Free Software Foundation, Inc. |
dd3b648e RP |
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 | |
99a7de40 JG |
9 | the Free Software Foundation; either version 2 of the License, or |
10 | (at your option) any later version. | |
dd3b648e RP |
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 | |
99a7de40 JG |
18 | along with this program; if not, write to the Free Software |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
dd3b648e RP |
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 | ||
7d9884b9 | 28 | #define TM_FILE_OVERRIDE |
dd3b648e | 29 | #include "defs.h" |
d747e0af | 30 | #include <string.h> |
dd3b648e | 31 | #include "tm-29k.h" |
76b2c3c8 | 32 | |
dd3b648e RP |
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" | |
76b2c3c8 | 42 | #include "gdbcore.h" |
dd3b648e | 43 | |
dd3b648e RP |
44 | extern struct target_ops eb_ops; /* Forward declaration */ |
45 | ||
19b66c0e JG |
46 | static void eb_close(); |
47 | ||
dd3b648e RP |
48 | #define LOG_FILE "eb.log" |
49 | #if defined (LOG_FILE) | |
50 | FILE *log_file; | |
51 | #endif | |
52 | ||
76b2c3c8 | 53 | static int timeout = 24; |
dd3b648e RP |
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. */ | |
76b2c3c8 JG |
239 | static void |
240 | eb_create_inferior (execfile, args, env) | |
241 | char *execfile; | |
242 | char *args; | |
243 | char **env; | |
dd3b648e | 244 | { |
76b2c3c8 | 245 | int entry_pt; |
dd3b648e | 246 | |
76b2c3c8 JG |
247 | if (args && *args) |
248 | error ("Can't pass arguments to remote EBMON process"); | |
dd3b648e | 249 | |
76b2c3c8 JG |
250 | if (execfile == 0 || exec_bfd == 0) |
251 | error ("No exec file specified"); | |
dd3b648e | 252 | |
76b2c3c8 | 253 | entry_pt = (int) bfd_get_start_address (exec_bfd); |
dd3b648e | 254 | |
76b2c3c8 JG |
255 | #ifdef CREATE_INFERIOR_HOOK |
256 | CREATE_INFERIOR_HOOK (0); /* No process-ID */ | |
257 | #endif | |
258 | ||
259 | { | |
260 | /* OK, now read in the file. Y=read, C=COFF, D=no symbols | |
261 | 0=start address, %s=filename. */ | |
262 | ||
263 | fprintf (eb_stream, "YC D,0:%s", prog_name); | |
264 | ||
265 | if (args != NULL) | |
266 | fprintf(eb_stream, " %s", args); | |
267 | ||
268 | fprintf (eb_stream, "\n"); | |
269 | fflush (eb_stream); | |
270 | ||
271 | expect_prompt (); | |
272 | ||
273 | need_gi = 1; | |
274 | } | |
275 | ||
276 | /* The "process" (board) is already stopped awaiting our commands, and | |
277 | the program is already downloaded. We just set its PC and go. */ | |
278 | ||
279 | clear_proceed_status (); | |
280 | ||
281 | /* Tell wait_for_inferior that we've started a new process. */ | |
282 | init_wait_for_inferior (); | |
283 | ||
284 | /* Set up the "saved terminal modes" of the inferior | |
285 | based on what modes we are starting it with. */ | |
286 | target_terminal_init (); | |
dd3b648e | 287 | |
76b2c3c8 JG |
288 | /* Install inferior's terminal modes. */ |
289 | target_terminal_inferior (); | |
290 | ||
291 | /* insert_step_breakpoint (); FIXME, do we need this? */ | |
292 | proceed ((CORE_ADDR)entry_pt, -1, 0); /* Let 'er rip... */ | |
dd3b648e RP |
293 | } |
294 | ||
295 | /* Translate baud rates from integers to damn B_codes. Unix should | |
296 | have outgrown this crap years ago, but even POSIX wouldn't buck it. */ | |
297 | ||
298 | #ifndef B19200 | |
299 | #define B19200 EXTA | |
300 | #endif | |
301 | #ifndef B38400 | |
302 | #define B38400 EXTB | |
303 | #endif | |
304 | ||
305 | struct {int rate, damn_b;} baudtab[] = { | |
306 | {0, B0}, | |
307 | {50, B50}, | |
308 | {75, B75}, | |
309 | {110, B110}, | |
310 | {134, B134}, | |
311 | {150, B150}, | |
312 | {200, B200}, | |
313 | {300, B300}, | |
314 | {600, B600}, | |
315 | {1200, B1200}, | |
316 | {1800, B1800}, | |
317 | {2400, B2400}, | |
318 | {4800, B4800}, | |
319 | {9600, B9600}, | |
320 | {19200, B19200}, | |
321 | {38400, B38400}, | |
322 | {-1, -1}, | |
323 | }; | |
324 | ||
325 | int damn_b (rate) | |
326 | int rate; | |
327 | { | |
328 | int i; | |
329 | ||
330 | for (i = 0; baudtab[i].rate != -1; i++) | |
331 | if (rate == baudtab[i].rate) return baudtab[i].damn_b; | |
332 | return B38400; /* Random */ | |
333 | } | |
334 | ||
335 | ||
336 | /* Open a connection to a remote debugger. | |
337 | NAME is the filename used for communication, then a space, | |
338 | then the name of the program as we should name it to EBMON. */ | |
339 | ||
340 | static int baudrate = 9600; | |
341 | static char *dev_name; | |
342 | void | |
343 | eb_open (name, from_tty) | |
344 | char *name; | |
345 | int from_tty; | |
346 | { | |
347 | TERMINAL sg; | |
348 | ||
349 | char *p; | |
350 | ||
f2fc6e7a JK |
351 | target_preopen (from_tty); |
352 | ||
dd3b648e RP |
353 | /* Find the first whitespace character, it separates dev_name from |
354 | prog_name. */ | |
355 | if (name == 0) | |
356 | goto erroid; | |
357 | ||
358 | for (p = name; | |
359 | *p != '\0' && !isspace (*p); p++) | |
360 | ; | |
361 | if (*p == '\0') | |
362 | erroid: | |
363 | error ("\ | |
364 | Please include the name of the device for the serial port,\n\ | |
365 | the baud rate, and the name of the program to run on the remote system."); | |
366 | dev_name = alloca (p - name + 1); | |
367 | strncpy (dev_name, name, p - name); | |
368 | dev_name[p - name] = '\0'; | |
369 | ||
370 | /* Skip over the whitespace after dev_name */ | |
371 | for (; isspace (*p); p++) | |
372 | /*EMPTY*/; | |
373 | ||
374 | if (1 != sscanf (p, "%d ", &baudrate)) | |
375 | goto erroid; | |
376 | ||
377 | /* Skip the number and then the spaces */ | |
378 | for (; isdigit (*p); p++) | |
379 | /*EMPTY*/; | |
380 | for (; isspace (*p); p++) | |
381 | /*EMPTY*/; | |
382 | ||
383 | if (prog_name != NULL) | |
384 | free (prog_name); | |
385 | prog_name = savestring (p, strlen (p)); | |
386 | ||
387 | eb_close (0); | |
388 | ||
389 | eb_desc = open (dev_name, O_RDWR); | |
390 | if (eb_desc < 0) | |
391 | perror_with_name (dev_name); | |
392 | ioctl (eb_desc, TIOCGETP, &sg); | |
393 | #ifdef HAVE_TERMIO | |
394 | sg.c_cc[VMIN] = 0; /* read with timeout. */ | |
395 | sg.c_cc[VTIME] = timeout * 10; | |
396 | sg.c_lflag &= ~(ICANON | ECHO); | |
397 | sg.c_cflag = (sg.c_cflag & ~CBAUD) | damn_b (baudrate); | |
398 | #else | |
399 | sg.sg_ispeed = damn_b (baudrate); | |
400 | sg.sg_ospeed = damn_b (baudrate); | |
401 | sg.sg_flags |= RAW | ANYP; | |
402 | sg.sg_flags &= ~ECHO; | |
403 | #endif | |
404 | ||
405 | ioctl (eb_desc, TIOCSETP, &sg); | |
406 | eb_stream = fdopen (eb_desc, "r+"); | |
407 | ||
408 | push_target (&eb_ops); | |
409 | if (from_tty) | |
410 | printf ("Remote %s debugging %s using %s\n", target_shortname, | |
411 | prog_name, dev_name); | |
412 | ||
413 | #ifndef HAVE_TERMIO | |
414 | #ifndef NO_SIGINTERRUPT | |
415 | /* Cause SIGALRM's to make reads fail with EINTR instead of resuming | |
416 | the read. */ | |
417 | if (siginterrupt (SIGALRM, 1) != 0) | |
418 | perror ("eb_open: error in siginterrupt"); | |
419 | #endif | |
420 | ||
421 | /* Set up read timeout timer. */ | |
422 | if ((void (*)) signal (SIGALRM, eb_timer) == (void (*)) -1) | |
423 | perror ("eb_open: error in signal"); | |
424 | #endif | |
425 | ||
426 | #if defined (LOG_FILE) | |
427 | log_file = fopen (LOG_FILE, "w"); | |
428 | if (log_file == NULL) | |
429 | perror_with_name (LOG_FILE); | |
430 | #endif | |
431 | ||
432 | /* Hello? Are you there? */ | |
433 | write (eb_desc, "\n", 1); | |
434 | ||
435 | expect_prompt (); | |
436 | } | |
437 | ||
438 | /* Close out all files and local state before this target loses control. */ | |
439 | ||
e36ca74a | 440 | static void |
dd3b648e RP |
441 | eb_close (quitting) |
442 | int quitting; | |
443 | { | |
444 | ||
445 | /* Due to a bug in Unix, fclose closes not only the stdio stream, | |
446 | but also the file descriptor. So we don't actually close | |
447 | eb_desc. */ | |
448 | if (eb_stream) | |
449 | fclose (eb_stream); /* This also closes eb_desc */ | |
450 | if (eb_desc >= 0) | |
451 | /* close (eb_desc); */ | |
452 | ||
453 | /* Do not try to close eb_desc again, later in the program. */ | |
454 | eb_stream = NULL; | |
455 | eb_desc = -1; | |
456 | ||
457 | #if defined (LOG_FILE) | |
76b2c3c8 JG |
458 | if (log_file) { |
459 | if (ferror (log_file)) | |
460 | printf ("Error writing log file.\n"); | |
461 | if (fclose (log_file) != 0) | |
462 | printf ("Error closing log file.\n"); | |
463 | } | |
dd3b648e RP |
464 | #endif |
465 | } | |
466 | ||
467 | /* Terminate the open connection to the remote debugger. | |
468 | Use this when you want to detach and do something else | |
469 | with your gdb. */ | |
470 | void | |
471 | eb_detach (from_tty) | |
472 | int from_tty; | |
473 | { | |
474 | pop_target(); /* calls eb_close to do the real work */ | |
475 | if (from_tty) | |
476 | printf ("Ending remote %s debugging\n", target_shortname); | |
477 | } | |
478 | ||
479 | /* Tell the remote machine to resume. */ | |
480 | ||
481 | void | |
482 | eb_resume (step, sig) | |
483 | int step, sig; | |
484 | { | |
485 | if (step) | |
486 | { | |
487 | write (eb_desc, "t 1,s\n", 6); | |
488 | /* Wait for the echo. */ | |
489 | expect ("t 1,s\r"); | |
490 | /* Then comes a line containing the instruction we stepped to. */ | |
491 | expect ("\n@"); | |
492 | /* Then we get the prompt. */ | |
493 | expect_prompt (); | |
494 | ||
495 | /* Force the next eb_wait to return a trap. Not doing anything | |
496 | about I/O from the target means that the user has to type | |
497 | "continue" to see any. This should be fixed. */ | |
498 | need_artificial_trap = 1; | |
499 | } | |
500 | else | |
501 | { | |
502 | if (need_gi) | |
503 | { | |
504 | need_gi = 0; | |
505 | write (eb_desc, "gi\n", 3); | |
506 | ||
507 | /* Swallow the echo of "gi". */ | |
508 | expect ("gi\r"); | |
509 | } | |
510 | else | |
511 | { | |
512 | write (eb_desc, "GR\n", 3); | |
513 | /* Swallow the echo. */ | |
514 | expect ("GR\r"); | |
515 | } | |
516 | } | |
517 | } | |
518 | ||
519 | /* Wait until the remote machine stops, then return, | |
520 | storing status in STATUS just as `wait' would. */ | |
521 | ||
522 | int | |
523 | eb_wait (status) | |
524 | WAITTYPE *status; | |
525 | { | |
526 | /* Strings to look for. '?' means match any single character. | |
527 | Note that with the algorithm we use, the initial character | |
528 | of the string cannot recur in the string, or we will not | |
529 | find some cases of the string in the input. */ | |
530 | ||
531 | static char bpt[] = "Invalid interrupt taken - #0x50 - "; | |
532 | /* It would be tempting to look for "\n[__exit + 0x8]\n" | |
533 | but that requires loading symbols with "yc i" and even if | |
534 | we did do that we don't know that the file has symbols. */ | |
535 | static char exitmsg[] = "\n@????????I JMPTI GR121,LR0"; | |
536 | char *bp = bpt; | |
537 | char *ep = exitmsg; | |
538 | ||
539 | /* Large enough for either sizeof (bpt) or sizeof (exitmsg) chars. */ | |
540 | char swallowed[50]; | |
541 | /* Current position in swallowed. */ | |
542 | char *swallowed_p = swallowed; | |
543 | ||
544 | int ch; | |
545 | int ch_handled; | |
546 | ||
547 | int old_timeout = timeout; | |
548 | ||
549 | WSETEXIT ((*status), 0); | |
550 | ||
551 | if (need_artificial_trap != 0) | |
552 | { | |
553 | WSETSTOP ((*status), SIGTRAP); | |
554 | need_artificial_trap--; | |
555 | return 0; | |
556 | } | |
557 | ||
558 | timeout = 0; /* Don't time out -- user program is running. */ | |
559 | while (1) | |
560 | { | |
561 | ch_handled = 0; | |
562 | ch = readchar (); | |
563 | if (ch == *bp) | |
564 | { | |
565 | bp++; | |
566 | if (*bp == '\0') | |
567 | break; | |
568 | ch_handled = 1; | |
569 | ||
570 | *swallowed_p++ = ch; | |
571 | } | |
572 | else | |
573 | bp = bpt; | |
574 | ||
575 | if (ch == *ep || *ep == '?') | |
576 | { | |
577 | ep++; | |
578 | if (*ep == '\0') | |
579 | break; | |
580 | ||
581 | if (!ch_handled) | |
582 | *swallowed_p++ = ch; | |
583 | ch_handled = 1; | |
584 | } | |
585 | else | |
586 | ep = exitmsg; | |
587 | ||
588 | if (!ch_handled) | |
589 | { | |
590 | char *p; | |
591 | ||
592 | /* Print out any characters which have been swallowed. */ | |
593 | for (p = swallowed; p < swallowed_p; ++p) | |
594 | putc (*p, stdout); | |
595 | swallowed_p = swallowed; | |
596 | ||
597 | putc (ch, stdout); | |
598 | } | |
599 | } | |
600 | expect_prompt (); | |
601 | if (*bp== '\0') | |
602 | WSETSTOP ((*status), SIGTRAP); | |
603 | else | |
604 | WSETEXIT ((*status), 0); | |
605 | timeout = old_timeout; | |
606 | ||
607 | return 0; | |
608 | } | |
609 | ||
610 | /* Return the name of register number REGNO | |
611 | in the form input and output by EBMON. | |
612 | ||
613 | Returns a pointer to a static buffer containing the answer. */ | |
614 | static char * | |
615 | get_reg_name (regno) | |
616 | int regno; | |
617 | { | |
618 | static char buf[80]; | |
619 | if (regno >= GR96_REGNUM && regno < GR96_REGNUM + 32) | |
620 | sprintf (buf, "GR%03d", regno - GR96_REGNUM + 96); | |
621 | else if (regno >= LR0_REGNUM && regno < LR0_REGNUM + 128) | |
622 | sprintf (buf, "LR%03d", regno - LR0_REGNUM); | |
623 | else if (regno == Q_REGNUM) | |
624 | strcpy (buf, "SR131"); | |
625 | else if (regno >= BP_REGNUM && regno <= CR_REGNUM) | |
626 | sprintf (buf, "SR%03d", regno - BP_REGNUM + 133); | |
627 | else if (regno == ALU_REGNUM) | |
628 | strcpy (buf, "SR132"); | |
629 | else if (regno >= IPC_REGNUM && regno <= IPB_REGNUM) | |
630 | sprintf (buf, "SR%03d", regno - IPC_REGNUM + 128); | |
631 | else if (regno >= VAB_REGNUM && regno <= LRU_REGNUM) | |
632 | sprintf (buf, "SR%03d", regno - VAB_REGNUM); | |
633 | else if (regno == GR1_REGNUM) | |
634 | strcpy (buf, "GR001"); | |
635 | return buf; | |
636 | } | |
637 | ||
638 | /* Read the remote registers into the block REGS. */ | |
639 | ||
640 | static void | |
641 | eb_fetch_registers () | |
642 | { | |
643 | int reg_index; | |
644 | int regnum_index; | |
645 | char tempbuf[10]; | |
646 | int i; | |
647 | ||
648 | #if 0 | |
649 | /* This should not be necessary, because one is supposed to read the | |
650 | registers only when the inferior is stopped (at least with | |
651 | ptrace() and why not make it the same for remote?). */ | |
652 | /* ^A is the "normal character" used to make sure we are talking to EBMON | |
653 | and not to the program being debugged. */ | |
654 | write (eb_desc, "\001\n"); | |
655 | expect_prompt (); | |
656 | #endif | |
657 | ||
658 | write (eb_desc, "dw gr96,gr127\n", 14); | |
659 | for (reg_index = 96, regnum_index = GR96_REGNUM; | |
660 | reg_index < 128; | |
661 | reg_index += 4, regnum_index += 4) | |
662 | { | |
663 | sprintf (tempbuf, "GR%03d ", reg_index); | |
664 | expect (tempbuf); | |
665 | get_hex_regs (4, regnum_index); | |
666 | expect ("\n"); | |
667 | } | |
668 | ||
669 | for (i = 0; i < 128; i += 32) | |
670 | { | |
671 | /* The PC has a tendency to hang if we get these | |
672 | all in one fell swoop ("dw lr0,lr127"). */ | |
673 | sprintf (tempbuf, "dw lr%d\n", i); | |
674 | write (eb_desc, tempbuf, strlen (tempbuf)); | |
675 | for (reg_index = i, regnum_index = LR0_REGNUM + i; | |
676 | reg_index < i + 32; | |
677 | reg_index += 4, regnum_index += 4) | |
678 | { | |
679 | sprintf (tempbuf, "LR%03d ", reg_index); | |
680 | expect (tempbuf); | |
681 | get_hex_regs (4, regnum_index); | |
682 | expect ("\n"); | |
683 | } | |
684 | } | |
685 | ||
686 | write (eb_desc, "dw sr133,sr133\n", 15); | |
687 | expect ("SR133 "); | |
688 | get_hex_regs (1, BP_REGNUM); | |
689 | expect ("\n"); | |
690 | ||
691 | write (eb_desc, "dw sr134,sr134\n", 15); | |
692 | expect ("SR134 "); | |
693 | get_hex_regs (1, FC_REGNUM); | |
694 | expect ("\n"); | |
695 | ||
696 | write (eb_desc, "dw sr135,sr135\n", 15); | |
697 | expect ("SR135 "); | |
698 | get_hex_regs (1, CR_REGNUM); | |
699 | expect ("\n"); | |
700 | ||
701 | write (eb_desc, "dw sr131,sr131\n", 15); | |
702 | expect ("SR131 "); | |
703 | get_hex_regs (1, Q_REGNUM); | |
704 | expect ("\n"); | |
705 | ||
706 | write (eb_desc, "dw sr0,sr14\n", 12); | |
707 | for (reg_index = 0, regnum_index = VAB_REGNUM; | |
708 | regnum_index <= LRU_REGNUM; | |
709 | regnum_index += 4, reg_index += 4) | |
710 | { | |
711 | sprintf (tempbuf, "SR%03d ", reg_index); | |
712 | expect (tempbuf); | |
713 | get_hex_regs (reg_index == 12 ? 3 : 4, regnum_index); | |
714 | expect ("\n"); | |
715 | } | |
716 | ||
717 | /* There doesn't seem to be any way to get these. */ | |
718 | { | |
719 | int val = -1; | |
720 | supply_register (FPE_REGNUM, &val); | |
e95bfbf1 | 721 | supply_register (INTE_REGNUM, &val); |
dd3b648e RP |
722 | supply_register (FPS_REGNUM, &val); |
723 | supply_register (EXO_REGNUM, &val); | |
724 | } | |
725 | ||
726 | write (eb_desc, "dw gr1,gr1\n", 11); | |
727 | expect ("GR001 "); | |
728 | get_hex_regs (1, GR1_REGNUM); | |
729 | expect_prompt (); | |
730 | } | |
731 | ||
732 | /* Fetch register REGNO, or all registers if REGNO is -1. | |
733 | Returns errno value. */ | |
17f7e032 | 734 | void |
dd3b648e RP |
735 | eb_fetch_register (regno) |
736 | int regno; | |
737 | { | |
738 | if (regno == -1) | |
739 | eb_fetch_registers (); | |
740 | else | |
741 | { | |
742 | char *name = get_reg_name (regno); | |
743 | fprintf (eb_stream, "dw %s,%s\n", name, name); | |
744 | expect (name); | |
745 | expect (" "); | |
746 | get_hex_regs (1, regno); | |
747 | expect_prompt (); | |
748 | } | |
17f7e032 | 749 | return; |
dd3b648e RP |
750 | } |
751 | ||
752 | /* Store the remote registers from the contents of the block REGS. */ | |
753 | ||
754 | static void | |
755 | eb_store_registers () | |
756 | { | |
757 | int i, j; | |
758 | fprintf (eb_stream, "s gr1,%x\n", read_register (GR1_REGNUM)); | |
759 | expect_prompt (); | |
760 | ||
761 | for (j = 0; j < 32; j += 16) | |
762 | { | |
763 | fprintf (eb_stream, "s gr%d,", j + 96); | |
764 | for (i = 0; i < 15; ++i) | |
765 | fprintf (eb_stream, "%x,", read_register (GR96_REGNUM + j + i)); | |
766 | fprintf (eb_stream, "%x\n", read_register (GR96_REGNUM + j + 15)); | |
767 | expect_prompt (); | |
768 | } | |
769 | ||
770 | for (j = 0; j < 128; j += 16) | |
771 | { | |
772 | fprintf (eb_stream, "s lr%d,", j); | |
773 | for (i = 0; i < 15; ++i) | |
774 | fprintf (eb_stream, "%x,", read_register (LR0_REGNUM + j + i)); | |
775 | fprintf (eb_stream, "%x\n", read_register (LR0_REGNUM + j + 15)); | |
776 | expect_prompt (); | |
777 | } | |
778 | ||
779 | fprintf (eb_stream, "s sr133,%x,%x,%x\n", read_register (BP_REGNUM), | |
780 | read_register (FC_REGNUM), read_register (CR_REGNUM)); | |
781 | expect_prompt (); | |
782 | fprintf (eb_stream, "s sr131,%x\n", read_register (Q_REGNUM)); | |
783 | expect_prompt (); | |
784 | fprintf (eb_stream, "s sr0,"); | |
785 | for (i = 0; i < 11; ++i) | |
786 | fprintf (eb_stream, "%x,", read_register (VAB_REGNUM + i)); | |
787 | fprintf (eb_stream, "%x\n", read_register (VAB_REGNUM + 11)); | |
788 | expect_prompt (); | |
789 | } | |
790 | ||
791 | /* Store register REGNO, or all if REGNO == 0. | |
792 | Return errno value. */ | |
e95bfbf1 | 793 | void |
dd3b648e RP |
794 | eb_store_register (regno) |
795 | int regno; | |
796 | { | |
797 | if (regno == -1) | |
798 | eb_store_registers (); | |
799 | else | |
800 | { | |
801 | char *name = get_reg_name (regno); | |
802 | fprintf (eb_stream, "s %s,%x\n", name, read_register (regno)); | |
803 | /* Setting GR1 changes the numbers of all the locals, so | |
804 | invalidate the register cache. Do this *after* calling | |
805 | read_register, because we want read_register to return the | |
806 | value that write_register has just stuffed into the registers | |
807 | array, not the value of the register fetched from the | |
808 | inferior. */ | |
809 | if (regno == GR1_REGNUM) | |
810 | registers_changed (); | |
811 | expect_prompt (); | |
812 | } | |
dd3b648e RP |
813 | } |
814 | ||
815 | /* Get ready to modify the registers array. On machines which store | |
816 | individual registers, this doesn't need to do anything. On machines | |
817 | which store all the registers in one fell swoop, this makes sure | |
818 | that registers contains all the registers from the program being | |
819 | debugged. */ | |
820 | ||
821 | void | |
822 | eb_prepare_to_store () | |
823 | { | |
824 | /* Do nothing, since we can store individual regs */ | |
825 | } | |
826 | ||
76b2c3c8 JG |
827 | |
828 | /* FIXME-someday! Merge these two. */ | |
dd3b648e | 829 | int |
8f1f2a72 | 830 | eb_xfer_inferior_memory (memaddr, myaddr, len, write, target) |
dd3b648e RP |
831 | CORE_ADDR memaddr; |
832 | char *myaddr; | |
833 | int len; | |
834 | int write; | |
8f1f2a72 | 835 | struct target_ops *target; /* ignored */ |
dd3b648e RP |
836 | { |
837 | if (write) | |
838 | return eb_write_inferior_memory (memaddr, myaddr, len); | |
839 | else | |
76b2c3c8 | 840 | return eb_read_inferior_memory (memaddr, myaddr, len); |
dd3b648e RP |
841 | } |
842 | ||
843 | void | |
844 | eb_files_info () | |
845 | { | |
846 | printf ("\tAttached to %s at %d baud and running program %s.\n", | |
847 | dev_name, baudrate, prog_name); | |
848 | } | |
849 | ||
850 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
76b2c3c8 | 851 | to inferior's memory at MEMADDR. Returns length moved. */ |
dd3b648e RP |
852 | int |
853 | eb_write_inferior_memory (memaddr, myaddr, len) | |
854 | CORE_ADDR memaddr; | |
855 | char *myaddr; | |
856 | int len; | |
857 | { | |
858 | int i; | |
859 | ||
860 | for (i = 0; i < len; i++) | |
861 | { | |
862 | if ((i % 16) == 0) | |
863 | fprintf (eb_stream, "sb %x,", memaddr + i); | |
864 | if ((i % 16) == 15 || i == len - 1) | |
865 | { | |
866 | fprintf (eb_stream, "%x\n", ((unsigned char *)myaddr)[i]); | |
867 | expect_prompt (); | |
868 | } | |
869 | else | |
870 | fprintf (eb_stream, "%x,", ((unsigned char *)myaddr)[i]); | |
871 | } | |
76b2c3c8 | 872 | return len; |
dd3b648e RP |
873 | } |
874 | ||
875 | /* Read LEN bytes from inferior memory at MEMADDR. Put the result | |
76b2c3c8 | 876 | at debugger address MYADDR. Returns length moved. */ |
dd3b648e RP |
877 | int |
878 | eb_read_inferior_memory(memaddr, myaddr, len) | |
879 | CORE_ADDR memaddr; | |
880 | char *myaddr; | |
881 | int len; | |
882 | { | |
883 | int i; | |
884 | ||
885 | /* Number of bytes read so far. */ | |
886 | int count; | |
887 | ||
888 | /* Starting address of this pass. */ | |
889 | unsigned long startaddr; | |
890 | ||
891 | /* Number of bytes to read in this pass. */ | |
892 | int len_this_pass; | |
893 | ||
894 | /* Note that this code works correctly if startaddr is just less | |
895 | than UINT_MAX (well, really CORE_ADDR_MAX if there was such a | |
896 | thing). That is, something like | |
897 | eb_read_bytes (CORE_ADDR_MAX - 4, foo, 4) | |
898 | works--it never adds len to memaddr and gets 0. */ | |
899 | /* However, something like | |
900 | eb_read_bytes (CORE_ADDR_MAX - 3, foo, 4) | |
901 | doesn't need to work. Detect it and give up if there's an attempt | |
902 | to do that. */ | |
76b2c3c8 JG |
903 | if (((memaddr - 1) + len) < memaddr) { |
904 | errno = EIO; | |
905 | return 0; | |
906 | } | |
dd3b648e RP |
907 | |
908 | startaddr = memaddr; | |
909 | count = 0; | |
910 | while (count < len) | |
911 | { | |
912 | len_this_pass = 16; | |
913 | if ((startaddr % 16) != 0) | |
914 | len_this_pass -= startaddr % 16; | |
915 | if (len_this_pass > (len - count)) | |
916 | len_this_pass = (len - count); | |
917 | ||
918 | fprintf (eb_stream, "db %x,%x\n", startaddr, | |
919 | (startaddr - 1) + len_this_pass); | |
920 | expect ("\n"); | |
921 | ||
922 | /* Look for 8 hex digits. */ | |
923 | i = 0; | |
924 | while (1) | |
925 | { | |
926 | if (isxdigit (readchar ())) | |
927 | ++i; | |
928 | else | |
929 | { | |
930 | expect_prompt (); | |
931 | error ("Hex digit expected from remote system."); | |
932 | } | |
933 | if (i >= 8) | |
934 | break; | |
935 | } | |
936 | ||
937 | expect (" "); | |
938 | ||
939 | for (i = 0; i < len_this_pass; i++) | |
940 | get_hex_byte (&myaddr[count++]); | |
941 | ||
942 | expect_prompt (); | |
943 | ||
944 | startaddr += len_this_pass; | |
945 | } | |
76b2c3c8 | 946 | return len; |
dd3b648e RP |
947 | } |
948 | ||
76b2c3c8 JG |
949 | static void |
950 | eb_kill (args, from_tty) | |
951 | char *args; | |
952 | int from_tty; | |
953 | { | |
954 | return; /* Ignore attempts to kill target system */ | |
955 | } | |
956 | ||
957 | /* Clean up when a program exits. | |
958 | ||
959 | The program actually lives on in the remote processor's RAM, and may be | |
960 | run again without a download. Don't leave it full of breakpoint | |
961 | instructions. */ | |
962 | ||
963 | void | |
964 | eb_mourn_inferior () | |
965 | { | |
966 | remove_breakpoints (); | |
967 | generic_mourn_inferior (); /* Do all the proper things now */ | |
968 | } | |
dd3b648e RP |
969 | /* Define the target subroutine names */ |
970 | ||
971 | struct target_ops eb_ops = { | |
972 | "amd-eb", "Remote serial AMD EBMON target", | |
f2fc6e7a JK |
973 | "Use a remote computer running EBMON connected by a serial line.\n\ |
974 | Arguments are the name of the device for the serial line,\n\ | |
975 | the speed to connect at in bits per second, and the filename of the\n\ | |
976 | executable as it exists on the remote computer. For example,\n\ | |
977 | target amd-eb /dev/ttya 9600 demo", | |
dd3b648e RP |
978 | eb_open, eb_close, |
979 | 0, eb_detach, eb_resume, eb_wait, | |
980 | eb_fetch_register, eb_store_register, | |
a03d4f8e | 981 | eb_prepare_to_store, |
dd3b648e RP |
982 | eb_xfer_inferior_memory, eb_files_info, |
983 | 0, 0, /* Breakpoints */ | |
984 | 0, 0, 0, 0, 0, /* Terminal handling */ | |
76b2c3c8 | 985 | eb_kill, |
8f1f2a72 | 986 | 0, /* load */ |
dd3b648e | 987 | 0, /* lookup_symbol */ |
76b2c3c8 JG |
988 | eb_create_inferior, |
989 | eb_mourn_inferior, | |
dd3b648e RP |
990 | process_stratum, 0, /* next */ |
991 | 1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */ | |
8f1f2a72 | 992 | 0, 0, /* Section pointers */ |
dd3b648e RP |
993 | OPS_MAGIC, /* Always the last thing */ |
994 | }; | |
995 | ||
996 | void | |
997 | _initialize_remote_eb () | |
998 | { | |
999 | add_target (&eb_ops); | |
1000 | } |