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51d6a954 RS |
1 | /* Remote debugging interface for boot monitors, for GDB. |
2 | Copyright 1990, 1991, 1992, 1993 Free Software Foundation, Inc. | |
3 | Contributed by Cygnus Support. Written by Rob Savoye 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 2 of the License, or | |
10 | (at your option) 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; if not, write to the Free Software | |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
21 | /* This file was derived from various remote-* modules. It is a collection | |
22 | of generic support functions so GDB can talk directly to a ROM based | |
23 | monitor. This saves use from having to hack an exception based handler | |
24 | into existance, and makes for quick porting. | |
25 | ||
26 | This module talks to a debug monitor called 'MONITOR', which | |
27 | We communicate with MONITOR via either a direct serial line, or a TCP | |
28 | (or possibly TELNET) stream to a terminal multiplexor, | |
29 | which in turn talks to the target board. | |
30 | */ | |
31 | ||
32 | #include "defs.h" | |
33 | #include "gdbcore.h" | |
34 | #include "target.h" | |
35 | #include "wait.h" | |
36 | #include <varargs.h> | |
37 | #include <signal.h> | |
38 | #include <string.h> | |
39 | #include <sys/types.h> | |
40 | #include "command.h" | |
41 | #include "serial.h" | |
42 | #include "monitor.h" | |
43 | #include "remote-utils.h" | |
44 | ||
45 | #ifdef HAVE_TERMIO | |
46 | # define TERMINAL struct termios | |
47 | #else | |
48 | # define TERMINAL struct sgttyb | |
49 | #endif | |
50 | ||
51 | struct monitor_ops *current_monitor; | |
52 | extern struct cmd_list_element *setlist; | |
53 | extern struct cmd_list_element *unsetlist; | |
54 | struct cmd_list_element *showlist; | |
55 | ||
56 | static int hashmark; /* flag set by "set hash" */ | |
57 | ||
58 | /* FIXME: Replace with sr_get_debug (). */ | |
59 | #define LOG_FILE "monitor.log" | |
60 | #if defined (LOG_FILE) | |
61 | FILE *log_file; | |
62 | #endif | |
63 | ||
64 | static int timeout = 24; | |
65 | ||
66 | /* Descriptor for I/O to remote machine. Initialize it to NULL so that | |
67 | monitor_open knows that we don't have a file open when the program starts. | |
68 | */ | |
69 | static serial_t monitor_desc = NULL; | |
70 | ||
71 | /* sets the download protocol, choices are srec, generic, boot */ | |
72 | char *loadtype; | |
73 | static char *loadtype_str; | |
74 | static void set_loadtype_command(); | |
75 | ||
76 | /* | |
77 | * set_loadtype_command -- set the type for downloading. Check to make | |
78 | * sure you have a support protocol for this target. | |
79 | */ | |
80 | static void | |
81 | set_loadtype_command (ignore, from_tty, c) | |
82 | char *ignore; | |
83 | int from_tty; | |
84 | struct cmd_list_element *c; | |
85 | { | |
86 | #if 0 | |
87 | char *type; | |
88 | if (strcmp (LOADTYPES, "")) { | |
89 | error ("No loadtype set"); | |
90 | return; | |
91 | } | |
92 | ||
93 | type = strtok(LOADTYPES, ","); | |
94 | if (STREQ (type, (*(char **) c->var))) { | |
95 | loadtype_str = savestring (*(char **) c->var, strlen (*(char **) c->var)); | |
96 | return; | |
97 | } | |
98 | ||
99 | while (type = strtok (NULL, ",") != (char *)NULL) | |
100 | if (STREQ (type, (*(char **) c->var))) | |
101 | loadtype_str = savestring (*(char **) c->var, strlen (*(char **) c->var)); | |
102 | #endif | |
103 | loadtype_str = savestring (*(char **) c->var, strlen (*(char **) c->var)); | |
104 | } | |
105 | ||
106 | /* | |
107 | * printf_monitor -- send data to monitor. Works just like printf. | |
108 | */ | |
109 | static void | |
110 | printf_monitor(va_alist) | |
111 | va_dcl | |
112 | { | |
113 | va_list args; | |
114 | char *pattern; | |
115 | char buf[200]; | |
116 | int i; | |
117 | ||
118 | va_start(args); | |
119 | ||
120 | pattern = va_arg(args, char *); | |
121 | ||
122 | vsprintf(buf, pattern, args); | |
123 | ||
124 | if (sr_get_debug() > 3) | |
125 | printf ("Sending to monitor,\r\n\t\"%s\".\r\n", buf); | |
126 | ||
127 | if (SERIAL_WRITE(monitor_desc, buf, strlen(buf))) | |
128 | fprintf(stderr, "SERIAL_WRITE failed: %s\n", safe_strerror(errno)); | |
129 | } | |
130 | ||
131 | /* Read a character from the remote system, doing all the fancy | |
132 | timeout stuff. */ | |
133 | static int | |
134 | readchar(timeout) | |
135 | int timeout; | |
136 | { | |
137 | int c; | |
138 | ||
139 | c = SERIAL_READCHAR(monitor_desc, timeout); | |
140 | ||
141 | if (sr_get_debug()) | |
142 | putchar(c & 0x7f); | |
143 | ||
144 | #ifdef LOG_FILE | |
145 | if (isascii (c)) | |
146 | putc(c & 0x7f, log_file); | |
147 | #endif | |
148 | ||
149 | if (c >= 0) | |
150 | return c & 0x7f; | |
151 | ||
152 | if (c == SERIAL_TIMEOUT) | |
153 | { | |
154 | if (timeout == 0) | |
155 | return c; /* Polls shouldn't generate timeout errors */ | |
156 | ||
157 | error("Timeout reading from remote system."); | |
158 | } | |
159 | ||
160 | perror_with_name("remote-monitor"); | |
161 | } | |
162 | ||
163 | /* Scan input from the remote system, until STRING is found. If DISCARD is | |
164 | non-zero, then discard non-matching input, else print it out. | |
165 | Let the user break out immediately. */ | |
166 | static void | |
167 | expect (string, discard) | |
168 | char *string; | |
169 | int discard; | |
170 | { | |
171 | char *p = string; | |
172 | int c; | |
173 | ||
174 | ||
175 | if (sr_get_debug()) | |
176 | printf ("Expecting \"%s\".\n", string); | |
177 | ||
178 | immediate_quit = 1; | |
179 | while (1) { | |
180 | c = readchar(timeout); | |
181 | if (!isascii (c)) | |
182 | continue; | |
183 | if (c == *p++) { | |
184 | if (*p == '\0') { | |
185 | immediate_quit = 0; | |
186 | if (sr_get_debug()) | |
187 | printf ("\nMatched\n"); | |
188 | return; | |
189 | } | |
190 | } else { | |
191 | if (!discard) { | |
192 | fwrite(string, 1, (p - 1) - string, stdout); | |
193 | putchar((char)c); | |
194 | fflush(stdout); | |
195 | } | |
196 | p = string; | |
197 | } | |
198 | } | |
199 | } | |
200 | ||
201 | /* Keep discarding input until we see the MONITOR prompt. | |
202 | ||
203 | The convention for dealing with the prompt is that you | |
204 | o give your command | |
205 | o *then* wait for the prompt. | |
206 | ||
207 | Thus the last thing that a procedure does with the serial line | |
208 | will be an expect_prompt(). Exception: monitor_resume does not | |
209 | wait for the prompt, because the terminal is being handed over | |
210 | to the inferior. However, the next thing which happens after that | |
211 | is a monitor_wait which does wait for the prompt. | |
212 | Note that this includes abnormal exit, e.g. error(). This is | |
213 | necessary to prevent getting into states from which we can't | |
214 | recover. */ | |
215 | static void | |
216 | expect_prompt(discard) | |
217 | int discard; | |
218 | { | |
219 | #if defined (LOG_FILE) | |
220 | /* This is a convenient place to do this. The idea is to do it often | |
221 | enough that we never lose much data if we terminate abnormally. */ | |
222 | fflush(log_file); | |
223 | #endif | |
224 | expect (PROMPT, discard); | |
225 | } | |
226 | ||
227 | /* | |
228 | * junk -- ignore junk characters. Returns a 1 if junk, 0 otherwise | |
229 | */ | |
230 | static int | |
231 | junk(ch) | |
232 | char ch; | |
233 | { | |
234 | switch (ch) { | |
235 | case ' ': | |
236 | case '-': | |
237 | case '\t': | |
238 | case '\r': | |
239 | case '\n': | |
240 | if (sr_get_debug() > 5) | |
241 | printf ("Ignoring \'%c\'.\n", ch); | |
242 | return 1; | |
243 | default: | |
244 | if (sr_get_debug() > 5) | |
245 | printf ("Accepting \'%c\'.\n", ch); | |
246 | return 0; | |
247 | } | |
248 | } | |
249 | ||
250 | /* | |
251 | * get_hex_digit -- Get a hex digit from the remote system & return its value. | |
252 | * If ignore is nonzero, ignore spaces, newline & tabs. | |
253 | */ | |
254 | static int | |
255 | get_hex_digit(ignore) | |
256 | int ignore; | |
257 | { | |
258 | static int ch; | |
259 | while (1) { | |
260 | ch = readchar(timeout); | |
261 | if (junk(ch)) | |
262 | continue; | |
263 | if (sr_get_debug() > 4) | |
264 | printf ("get_hex_digit() got a 0x%x(%c)\n", ch, ch); | |
265 | ||
266 | if (ch >= '0' && ch <= '9') | |
267 | return ch - '0'; | |
268 | else if (ch >= 'A' && ch <= 'F') | |
269 | return ch - 'A' + 10; | |
270 | else if (ch >= 'a' && ch <= 'f') | |
271 | return ch - 'a' + 10; | |
272 | else if (ch == ' ' && ignore) | |
273 | ; | |
274 | else { | |
275 | expect_prompt(1); | |
276 | error("Invalid hex digit from remote system."); | |
277 | } | |
278 | } | |
279 | } | |
280 | ||
281 | /* get_hex_byte -- Get a byte from monitor and put it in *BYT. | |
282 | * Accept any number leading spaces. | |
283 | */ | |
284 | static void | |
285 | get_hex_byte (byt) | |
286 | char *byt; | |
287 | { | |
288 | int val; | |
289 | ||
290 | val = get_hex_digit (1) << 4; | |
291 | if (sr_get_debug() > 3) | |
292 | printf ("\nget_hex_digit() -- Read first nibble 0x%x\n", val); | |
293 | ||
294 | val |= get_hex_digit (0); | |
295 | if (sr_get_debug() > 3) | |
296 | printf ("\nget_hex_digit() -- Read second nibble 0x%x\n", val); | |
297 | *byt = val; | |
298 | ||
299 | if (sr_get_debug() > 3) | |
300 | printf ("\nget_hex_digit() -- Read a 0x%x\n", val); | |
301 | } | |
302 | ||
303 | /* | |
304 | * get_hex_word -- Get N 32-bit words from remote, each preceded by a space, | |
305 | * and put them in registers starting at REGNO. | |
306 | */ | |
307 | static int | |
308 | get_hex_word () | |
309 | { | |
310 | long val; | |
311 | int i; | |
312 | ||
313 | val = 0; | |
314 | for (i = 0; i < 8; i++) | |
315 | val = (val << 4) + get_hex_digit (i == 0); | |
316 | ||
317 | if (sr_get_debug() > 3) | |
318 | printf ("\nget_hex_word() got a 0x%x.\n", val); | |
319 | ||
320 | return val; | |
321 | } | |
322 | ||
323 | /* This is called not only when we first attach, but also when the | |
324 | user types "run" after having attached. */ | |
325 | void | |
326 | monitor_create_inferior (execfile, args, env) | |
327 | char *execfile; | |
328 | char *args; | |
329 | char **env; | |
330 | { | |
331 | int entry_pt; | |
332 | ||
333 | if (args && *args) | |
334 | error("Can't pass arguments to remote MONITOR process"); | |
335 | ||
336 | if (execfile == 0 || exec_bfd == 0) | |
337 | error("No exec file specified"); | |
338 | ||
339 | entry_pt = (int) bfd_get_start_address (exec_bfd); | |
340 | ||
341 | #ifdef LOG_FILE | |
342 | fputs ("\nIn Create_inferior()", log_file); | |
343 | #endif | |
344 | ||
345 | /* The "process" (board) is already stopped awaiting our commands, and | |
346 | the program is already downloaded. We just set its PC and go. */ | |
347 | ||
348 | clear_proceed_status (); | |
349 | ||
350 | /* Tell wait_for_inferior that we've started a new process. */ | |
351 | init_wait_for_inferior (); | |
352 | ||
353 | /* Set up the "saved terminal modes" of the inferior | |
354 | based on what modes we are starting it with. */ | |
355 | target_terminal_init (); | |
356 | ||
357 | /* Install inferior's terminal modes. */ | |
358 | target_terminal_inferior (); | |
359 | ||
360 | /* insert_step_breakpoint (); FIXME, do we need this? */ | |
361 | ||
362 | /* Let 'er rip... */ | |
363 | proceed ((CORE_ADDR)entry_pt, TARGET_SIGNAL_DEFAULT, 0); | |
364 | } | |
365 | ||
366 | /* Open a connection to a remote debugger. | |
367 | NAME is the filename used for communication. */ | |
368 | ||
369 | static int baudrate = 9600; | |
370 | static char dev_name[100]; | |
371 | ||
372 | void | |
373 | monitor_open(args, name, from_tty) | |
374 | char *args; | |
375 | char *name; | |
376 | int from_tty; | |
377 | { | |
378 | ||
379 | if (args == NULL) | |
380 | error ("Use `target %s DEVICE-NAME' to use a serial port, or \n\ | |
381 | `target %s HOST-NAME:PORT-NUMBER' to use a network connection.", name, name); | |
382 | ||
383 | /* if (is_open) */ | |
384 | monitor_close(0); | |
385 | ||
386 | strcpy(dev_name, args); | |
387 | monitor_desc = SERIAL_OPEN(dev_name); | |
388 | ||
389 | if (monitor_desc == NULL) | |
390 | perror_with_name(dev_name); | |
391 | ||
392 | if (baud_rate != -1) | |
393 | { | |
394 | if (SERIAL_SETBAUDRATE (monitor_desc, baud_rate)) | |
395 | { | |
396 | SERIAL_CLOSE (monitor_desc); | |
397 | perror_with_name (name); | |
398 | } | |
399 | } | |
400 | ||
401 | SERIAL_RAW(monitor_desc); | |
402 | ||
403 | #if defined (LOG_FILE) | |
404 | log_file = fopen (LOG_FILE, "w"); | |
405 | if (log_file == NULL) | |
406 | perror_with_name (LOG_FILE); | |
407 | #endif | |
408 | ||
409 | /* wake up the monitor and see if it's alive */ | |
410 | printf_monitor(INIT_CMD); | |
411 | expect_prompt(1); /* See if we get a prompt */ | |
412 | ||
413 | /* try again to be sure */ | |
414 | printf_monitor(INIT_CMD); | |
415 | expect_prompt(1); /* See if we get a prompt */ | |
416 | ||
417 | if (from_tty) | |
418 | printf("Remote target %s connected to %s\n", TARGET_NAME, dev_name); | |
419 | ||
420 | ||
421 | } | |
422 | ||
423 | /* | |
424 | * _close -- Close out all files and local state before this target loses control. | |
425 | */ | |
426 | ||
427 | void | |
428 | monitor_close (quitting) | |
429 | int quitting; | |
430 | { | |
431 | SERIAL_CLOSE(monitor_desc); | |
432 | monitor_desc = NULL; | |
433 | ||
434 | #if defined (LOG_FILE) | |
435 | if (log_file) { | |
436 | if (ferror(log_file)) | |
437 | fprintf(stderr, "Error writing log file.\n"); | |
438 | if (fclose(log_file) != 0) | |
439 | fprintf(stderr, "Error closing log file.\n"); | |
440 | } | |
441 | #endif | |
442 | } | |
443 | ||
444 | /* Terminate the open connection to the remote debugger. | |
445 | Use this when you want to detach and do something else | |
446 | with your gdb. */ | |
447 | void | |
448 | monitor_detach (from_tty) | |
449 | int from_tty; | |
450 | { | |
451 | pop_target(); /* calls monitor_close to do the real work */ | |
452 | if (from_tty) | |
453 | printf ("Ending remote %s debugging\n", target_shortname); | |
454 | } | |
455 | ||
456 | /* | |
457 | * _resume -- Tell the remote machine to resume. | |
458 | */ | |
459 | void | |
460 | monitor_resume (pid, step, sig) | |
461 | int pid, step; | |
462 | enum target_signal sig; | |
463 | { | |
464 | #ifdef LOG_FILE | |
465 | fprintf (log_file, "\nIn Resume (step=%d, sig=%d)\n", step, sig); | |
466 | #endif | |
467 | ||
468 | if (step) | |
469 | { | |
470 | printf_monitor (STEP_CMD); | |
471 | /* wait for the echo. */ | |
472 | expect (STEP_CMD, 1); | |
473 | } | |
474 | else | |
475 | { | |
476 | printf_monitor (GO_CMD); | |
477 | /* swallow the echo. */ | |
478 | expect (GO_CMD, 1); | |
479 | } | |
480 | } | |
481 | ||
482 | /* | |
483 | * _wait -- Wait until the remote machine stops, then return, | |
484 | * storing status in status just as `wait' would. | |
485 | */ | |
486 | ||
487 | int | |
488 | monitor_wait (pid, status) | |
489 | int pid; | |
490 | struct target_waitstatus *status; | |
491 | { | |
492 | int old_timeout = timeout; | |
493 | #ifdef LOG_FILE | |
494 | fputs ("\nIn wait ()", log_file); | |
495 | #endif | |
496 | ||
497 | status->kind = TARGET_WAITKIND_EXITED; | |
498 | status->value.integer = 0; | |
499 | ||
500 | timeout = 0; /* Don't time out -- user program is running. */ | |
501 | ||
502 | expect_prompt(0); /* Wait for prompt, outputting extraneous text */ | |
503 | ||
504 | status->kind = TARGET_WAITKIND_STOPPED; | |
505 | status->value.sig = TARGET_SIGNAL_TRAP; | |
506 | ||
507 | timeout = old_timeout; | |
508 | ||
509 | return 0; | |
510 | } | |
511 | ||
512 | /* Return the name of register number regno in the form input and output by | |
513 | monitor. Currently, register_names just happens to contain exactly what | |
514 | monitor wants. Lets take advantage of that just as long as possible! */ | |
515 | ||
516 | static char * | |
517 | get_reg_name (regno) | |
518 | int regno; | |
519 | { | |
520 | static char buf[50]; | |
521 | const char *p; | |
522 | char *b; | |
523 | ||
524 | b = buf; | |
525 | ||
526 | if (regno < 0) | |
527 | return (""); | |
528 | ||
529 | for (p = REGNAMES(regno); *p; p++) | |
530 | *b++ = tolower(*p); | |
531 | ||
532 | *b = '\000'; | |
533 | ||
534 | if (sr_get_debug() > 5) | |
535 | printf ("Got name \"%s\" from regno #%d.\n", buf, regno); | |
536 | ||
537 | return buf; | |
538 | } | |
539 | ||
540 | /* read the remote registers into the block regs. */ | |
541 | ||
542 | void | |
543 | monitor_fetch_registers () | |
544 | { | |
545 | int regno; | |
546 | ||
547 | /* yeah yeah, i know this is horribly inefficient. but it isn't done | |
548 | very often... i'll clean it up later. */ | |
549 | ||
550 | for (regno = 0; regno <= PC_REGNUM; regno++) | |
551 | monitor_fetch_register(regno); | |
552 | } | |
553 | ||
554 | /* | |
555 | * monitor_fetch_register -- fetch register REGNO, or all registers if REGNO is -1. | |
556 | * Returns errno value. | |
557 | */ | |
558 | void | |
559 | monitor_fetch_register (regno) | |
560 | int regno; | |
561 | { | |
562 | int val, j; | |
563 | ||
564 | #ifdef LOG_FILE | |
565 | fprintf (log_file, "\nIn Fetch Register (reg=%s)\n", get_reg_name (regno)); | |
566 | fflush (log_file); | |
567 | #endif | |
568 | ||
569 | if (regno < 0) { | |
570 | monitor_fetch_registers (); | |
571 | } else { | |
572 | char *name = get_reg_name (regno); | |
573 | if (STREQ(name, "")) | |
574 | return; | |
575 | printf_monitor (ROMCMD(GET_REG), name); /* send the command */ | |
576 | expect (name, 1); /* then strip the leading garbage */ | |
577 | if (*ROMDELIM(GET_REG) != 0) { /* if there's a delimiter */ | |
578 | expect (ROMDELIM(GET_REG), 1); | |
579 | } | |
580 | ||
581 | val = get_hex_word(); /* get the value, ignore junk */ | |
582 | supply_register (regno, (char *) &val); | |
583 | ||
584 | if (*ROMDELIM(GET_REG) != 0) { | |
585 | /*** expect (ROMRES(GET_REG)); ***/ | |
586 | printf_monitor (CMD_END); | |
587 | } | |
588 | expect_prompt (1); | |
589 | } | |
590 | return; | |
591 | } | |
592 | ||
593 | /* Store the remote registers from the contents of the block REGS. */ | |
594 | ||
595 | void | |
596 | monitor_store_registers () | |
597 | { | |
598 | int regno; | |
599 | ||
600 | #ifdef LOG_FILE | |
601 | fprintf (log_file, "\nIn Fetch Registers\n"); | |
602 | fflush (log_file); | |
603 | #endif | |
604 | for (regno = 0; regno <= PC_REGNUM; regno++) | |
605 | monitor_store_register(regno); | |
606 | ||
607 | registers_changed (); | |
608 | } | |
609 | ||
610 | /* Store register REGNO, or all if REGNO == 0. | |
611 | return errno value. */ | |
612 | void | |
613 | monitor_store_register (regno) | |
614 | int regno; | |
615 | { | |
616 | char *name; | |
617 | ||
618 | #ifdef LOG_FILE | |
619 | fprintf (log_file, "\nIn Store_register (regno=%d)\n", regno); | |
620 | #endif | |
621 | ||
622 | if (regno < 0) | |
623 | monitor_store_registers (); | |
624 | else { | |
625 | if (sr_get_debug() > 3) | |
626 | printf ("Setting register %s to 0x%x\n", get_reg_name (regno), read_register (regno)); | |
627 | ||
628 | name = get_reg_name (regno); | |
629 | if (STREQ(name, "")) | |
630 | return; | |
631 | printf_monitor (ROMCMD(SET_REG), name); /* send the command */ | |
632 | expect (name, 1); /* then strip the leading garbage */ | |
633 | if (*ROMDELIM(SET_REG) != 0) { /* if there's a delimiter */ | |
634 | expect (ROMDELIM(SET_REG), 1); | |
635 | } | |
636 | ||
637 | if (*ROMDELIM(SET_REG) != 0) { | |
638 | printf_monitor ("%s%s\n",read_register(regno), CMD_END); | |
639 | } | |
640 | expect_prompt (1); | |
641 | } | |
642 | return; | |
643 | ||
644 | #if 0 | |
645 | printf_monitor (SET_REG, get_reg_name (regno), | |
646 | read_register (regno)); | |
647 | expect_prompt (1); | |
648 | } | |
649 | #endif | |
650 | } | |
651 | ||
652 | /* Get ready to modify the registers array. On machines which store | |
653 | individual registers, this doesn't need to do anything. On machines | |
654 | which store all the registers in one fell swoop, this makes sure | |
655 | that registers contains all the registers from the program being | |
656 | debugged. */ | |
657 | ||
658 | void | |
659 | monitor_prepare_to_store () | |
660 | { | |
661 | /* Do nothing, since we can store individual regs */ | |
662 | } | |
663 | ||
664 | void | |
665 | monitor_files_info () | |
666 | { | |
667 | printf ("\tAttached to %s at %d baud.\n", | |
668 | dev_name, baudrate); | |
669 | } | |
670 | ||
671 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
672 | to inferior's memory at MEMADDR. Returns length moved. */ | |
673 | int | |
674 | monitor_write_inferior_memory (memaddr, myaddr, len) | |
675 | CORE_ADDR memaddr; | |
676 | unsigned char *myaddr; | |
677 | int len; | |
678 | { | |
679 | int i; | |
680 | char buf[10]; | |
681 | ||
682 | #ifdef LOG_FILE | |
683 | fprintf (log_file, "\nIn Write_inferior_memory (memaddr=%x, len=%d)\n", memaddr, len); | |
684 | #endif | |
685 | ||
686 | #define MEM_PROMPT "" /* FIXME, bogus */ | |
687 | for (i = 0; i < len; i++) | |
688 | { | |
689 | printf_monitor (SET_MEM, memaddr + i); | |
690 | expect (sprintf (buf, MEM_PROMPT, memaddr + i), 1); | |
691 | expect (CMD_DELIM); | |
692 | printf_monitor ("%x", myaddr[i]); | |
693 | if (sr_get_debug()) | |
694 | printf ("\nSet 0x%x to 0x%x\n", memaddr + i, myaddr[i]); | |
695 | if (CMD_END) | |
696 | { | |
697 | /*** expect (sprintf (buf, MEM_PROMPT, memaddr + i +1), 1); | |
698 | expect (CMD_DELIM); ***/ | |
699 | printf_monitor (CMD_END); | |
700 | } | |
701 | expect_prompt (1); | |
702 | } | |
703 | return len; | |
704 | } | |
705 | ||
706 | /* | |
707 | * monitor_read_inferior_memory -- read LEN bytes from inferior memory | |
708 | * at MEMADDR. Put the result at debugger address MYADDR. Returns | |
709 | * length moved. | |
710 | */ | |
711 | int | |
712 | monitor_read_inferior_memory(memaddr, myaddr, len) | |
713 | CORE_ADDR memaddr; | |
714 | char *myaddr; | |
715 | int len; | |
716 | { | |
717 | int i, j; | |
718 | char buf[20]; | |
719 | ||
720 | /* Number of bytes read so far. */ | |
721 | int count; | |
722 | ||
723 | /* Starting address of this pass. */ | |
724 | unsigned long startaddr; | |
725 | ||
726 | /* Number of bytes to read in this pass. */ | |
727 | int len_this_pass; | |
728 | ||
729 | #ifdef LOG_FILE | |
730 | fprintf (log_file, "\nIn Read_inferior_memory (memaddr=%x, len=%d)\n", memaddr, len); | |
731 | #endif | |
732 | ||
733 | /* Note that this code works correctly if startaddr is just less | |
734 | than UINT_MAX (well, really CORE_ADDR_MAX if there was such a | |
735 | thing). That is, something like | |
736 | monitor_read_bytes (CORE_ADDR_MAX - 4, foo, 4) | |
737 | works--it never adds len To memaddr and gets 0. */ | |
738 | /* However, something like | |
739 | monitor_read_bytes (CORE_ADDR_MAX - 3, foo, 4) | |
740 | doesn't need to work. Detect it and give up if there's an attempt | |
741 | to do that. */ | |
742 | if (((memaddr - 1) + len) < memaddr) { | |
743 | errno = EIO; | |
744 | return 0; | |
745 | } | |
746 | ||
747 | startaddr = memaddr; | |
748 | count = 0; | |
749 | while (count < len) { | |
750 | len_this_pass = 16; | |
751 | if ((startaddr % 16) != 0) | |
752 | len_this_pass -= startaddr % 16; | |
753 | if (len_this_pass > (len - count)) | |
754 | len_this_pass = (len - count); | |
755 | if (sr_get_debug()) | |
756 | printf ("\nDisplay %d bytes at %x\n", len_this_pass, startaddr); | |
757 | ||
758 | for (i = 0; i < len_this_pass; i++) { | |
759 | printf_monitor (ROMCMD(GET_MEM), startaddr, startaddr); | |
760 | sprintf (buf, ROMCMD(GET_MEM), startaddr, startaddr); | |
761 | #if 0 | |
762 | expect (buf,1); /* get the command echo */ | |
763 | get_hex_word(1); /* strip away the address */ | |
764 | #endif | |
765 | if (*ROMDELIM(GET_MEM) != 0) { /* if there's a delimiter */ | |
766 | expect (ROMDELIM(GET_MEM), 1); | |
767 | } else { | |
768 | sprintf (buf, ROMCMD(GET_MEM), startaddr, startaddr); | |
769 | expect (buf,1); /* get the command echo */ | |
770 | get_hex_word(1); /* strip away the address */ | |
771 | } | |
772 | get_hex_byte (&myaddr[count++]); /* get the value at this address */ | |
773 | ||
774 | if (*ROMDELIM(GET_MEM) != 0) { | |
775 | printf_monitor (CMD_END); | |
776 | } | |
777 | expect_prompt (1); | |
778 | startaddr += 1; | |
779 | } | |
780 | } | |
781 | return len; | |
782 | } | |
783 | ||
784 | /* FIXME-someday! merge these two. */ | |
785 | int | |
786 | monitor_xfer_inferior_memory (memaddr, myaddr, len, write, target) | |
787 | CORE_ADDR memaddr; | |
788 | char *myaddr; | |
789 | int len; | |
790 | int write; | |
791 | struct target_ops *target; /* ignored */ | |
792 | { | |
793 | if (write) | |
794 | return monitor_write_inferior_memory (memaddr, myaddr, len); | |
795 | else | |
796 | return monitor_read_inferior_memory (memaddr, myaddr, len); | |
797 | } | |
798 | ||
799 | void | |
800 | monitor_kill (args, from_tty) | |
801 | char *args; | |
802 | int from_tty; | |
803 | { | |
804 | return; /* ignore attempts to kill target system */ | |
805 | } | |
806 | ||
807 | /* Clean up when a program exits. | |
808 | The program actually lives on in the remote processor's RAM, and may be | |
809 | run again without a download. Don't leave it full of breakpoint | |
810 | instructions. */ | |
811 | ||
812 | void | |
813 | monitor_mourn_inferior () | |
814 | { | |
815 | remove_breakpoints (); | |
816 | generic_mourn_inferior (); /* Do all the proper things now */ | |
817 | } | |
818 | ||
819 | #define MAX_MONITOR_BREAKPOINTS 16 | |
820 | ||
821 | extern int memory_breakpoint_size; | |
822 | static CORE_ADDR breakaddr[MAX_MONITOR_BREAKPOINTS] = {0}; | |
823 | ||
824 | /* | |
825 | * monitor_insert_breakpoint -- add a breakpoint | |
826 | */ | |
827 | int | |
828 | monitor_insert_breakpoint (addr, shadow) | |
829 | CORE_ADDR addr; | |
830 | char *shadow; | |
831 | { | |
832 | int i; | |
833 | ||
834 | #ifdef LOG_FILE | |
835 | fprintf (log_file, "\nIn Insert_breakpoint (addr=%x)\n", addr); | |
836 | #endif | |
837 | ||
838 | for (i = 0; i <= MAX_MONITOR_BREAKPOINTS; i++) | |
839 | if (breakaddr[i] == 0) | |
840 | { | |
841 | breakaddr[i] = addr; | |
842 | if (sr_get_debug()) | |
843 | printf ("Breakpoint at %x\n", addr); | |
844 | monitor_read_inferior_memory(addr, shadow, memory_breakpoint_size); | |
845 | printf_monitor(SET_BREAK_CMD, addr); | |
846 | expect_prompt(1); | |
847 | return 0; | |
848 | } | |
849 | ||
850 | fprintf(stderr, "Too many breakpoints (> 16) for monitor\n"); | |
851 | return 1; | |
852 | } | |
853 | ||
854 | /* | |
855 | * _remove_breakpoint -- Tell the monitor to remove a breakpoint | |
856 | */ | |
857 | int | |
858 | monitor_remove_breakpoint (addr, shadow) | |
859 | CORE_ADDR addr; | |
860 | char *shadow; | |
861 | { | |
862 | int i; | |
863 | ||
864 | #ifdef LOG_FILE | |
865 | fprintf (log_file, "\nIn Remove_breakpoint (addr=%x)\n", addr); | |
866 | #endif | |
867 | for (i = 0; i < MAX_MONITOR_BREAKPOINTS; i++) | |
868 | if (breakaddr[i] == addr) | |
869 | { | |
870 | breakaddr[i] = 0; | |
871 | /* some monitors remove breakpoints based on the address */ | |
872 | if (strcasecmp (target_shortname, "bug") == 0) | |
873 | printf_monitor(CLR_BREAK_CMD, addr); | |
874 | else | |
875 | printf_monitor(CLR_BREAK_CMD, i); | |
876 | expect_prompt(1); | |
877 | return 0; | |
878 | } | |
879 | ||
880 | fprintf(stderr, "Can't find breakpoint associated with 0x%x\n", addr); | |
881 | return 1; | |
882 | } | |
883 | ||
884 | /* Load a file. This is usually an srecord, which is ascii. No | |
885 | protocol, just sent line by line. */ | |
886 | ||
887 | #define DOWNLOAD_LINE_SIZE 100 | |
888 | void | |
889 | monitor_load (arg) | |
890 | char *arg; | |
891 | { | |
892 | FILE *download; | |
893 | char buf[DOWNLOAD_LINE_SIZE]; | |
894 | int i, bytes_read; | |
895 | ||
896 | if (sr_get_debug()) | |
897 | printf ("Loading %s to monitor\n", arg); | |
898 | ||
899 | download = fopen (arg, "r"); | |
900 | if (download == NULL) | |
901 | { | |
902 | error (sprintf (buf, "%s Does not exist", arg)); | |
903 | return; | |
904 | } | |
905 | ||
906 | printf_monitor (LOAD_CMD); | |
907 | /* expect ("Waiting for S-records from host... ", 1); */ | |
908 | ||
909 | while (!feof (download)) | |
910 | { | |
911 | bytes_read = fread (buf, sizeof (char), DOWNLOAD_LINE_SIZE, download); | |
912 | if (hashmark) | |
913 | { | |
914 | putchar ('.'); | |
915 | fflush (stdout); | |
916 | } | |
917 | ||
918 | if (SERIAL_WRITE(monitor_desc, buf, bytes_read)) { | |
919 | fprintf(stderr, "SERIAL_WRITE failed: (while downloading) %s\n", safe_strerror(errno)); | |
920 | break; | |
921 | } | |
922 | i = 0; | |
923 | while (i++ <=200000) {} ; /* Ugly HACK, probably needs flow control */ | |
924 | if (bytes_read < DOWNLOAD_LINE_SIZE) | |
925 | { | |
926 | if (!feof (download)) | |
927 | error ("Only read %d bytes\n", bytes_read); | |
928 | break; | |
929 | } | |
930 | } | |
931 | ||
932 | if (hashmark) | |
933 | { | |
934 | putchar ('\n'); | |
935 | } | |
936 | if (!feof (download)) | |
937 | error ("Never got EOF while downloading"); | |
938 | fclose (download); | |
939 | } | |
940 | ||
941 | /* Put a command string, in args, out to MONITOR. Output from MONITOR is placed | |
942 | on the users terminal until the prompt is seen. */ | |
943 | ||
944 | void | |
945 | monitor_command (args, fromtty) | |
946 | char *args; | |
947 | int fromtty; | |
948 | { | |
949 | #ifdef LOG_FILE | |
950 | fprintf (log_file, "\nIn command (args=%s)\n", args); | |
951 | #endif | |
952 | if (monitor_desc == NULL) | |
953 | error("monitor target not open."); | |
954 | ||
955 | if (!args) | |
956 | error("Missing command."); | |
957 | ||
958 | printf_monitor("%s\r", args); | |
959 | expect_prompt(0); | |
960 | } | |
961 | ||
962 | /* | |
963 | * _initialize_remote_monitors -- setup a few addtitional commands that | |
964 | * are usually only used by monitors. | |
965 | */ | |
966 | void | |
967 | _initialize_remote_monitors () | |
968 | { | |
969 | struct cmd_list_element *c; | |
970 | ||
971 | /* this sets the type of download protocol */ | |
972 | c = add_set_cmd ("loadtype", no_class, var_string, (char *)&loadtype_str, | |
973 | "Set the type of the remote load protocol.\n", &setlist); | |
974 | c->function.sfunc = set_loadtype_command; | |
975 | add_show_from_set (c, &showlist); | |
976 | loadtype_str = savestring ("generic", 8); | |
977 | ||
978 | add_show_from_set (add_set_cmd ("hash", no_class, var_boolean, | |
979 | (char *)&hashmark, | |
980 | "Set display of activity while downloading a file.\n\ | |
981 | When enabled, a period \'.\' is displayed.", | |
982 | &setlist), | |
983 | &showlist); | |
984 | ||
985 | /* generic monitor command */ | |
986 | add_com ("monitor", class_obscure, monitor_command, | |
987 | "Send a command to the debug monitor."); | |
988 | } |