Commit | Line | Data |
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054240ec | 1 | /* Remote debugging interface for MONITOR boot monitor, for GDB. |
5905161c | 2 | Copyright 1990, 1991, 1992, 1993 Free Software Foundation, Inc. |
054240ec RS |
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 remote-eb.c, which did a similar job, but for | |
22 | an AMD-29K running EBMON. That file was in turn derived from remote.c | |
23 | as mentioned in the following comment (left in for comic relief): | |
24 | ||
25 | "This is like remote.c but is for an esoteric situation-- | |
d7d35f00 | 26 | having an a29k board in a PC hooked up to a unix machine with |
054240ec RS |
27 | a serial line, and running ctty com1 on the PC, through which |
28 | the unix machine can run ebmon. Not to mention that the PC | |
29 | has PC/NFS, so it can access the same executables that gdb can, | |
30 | over the net in real time." | |
31 | ||
32 | In reality, this module talks to a debug monitor called 'MONITOR', which | |
33 | We communicate with MONITOR via either a direct serial line, or a TCP | |
34 | (or possibly TELNET) stream to a terminal multiplexor, | |
35 | which in turn talks to the target board. | |
36 | ||
37 | This is based on remote-st2000.c. I left in the above note here for histerical | |
38 | reasons. | |
39 | */ | |
40 | ||
41 | #include "defs.h" | |
42 | #include "gdbcore.h" | |
43 | #include "target.h" | |
44 | #include "wait.h" | |
45 | #include <varargs.h> | |
46 | #include <signal.h> | |
47 | #include <string.h> | |
48 | #include <sys/types.h> | |
49 | #include "command.h" | |
50 | #include "serial.h" | |
51 | #include "monitor.h" | |
52 | ||
53 | #ifdef HAVE_TERMIO | |
54 | # define TERMINAL struct termios | |
55 | #else | |
56 | # define TERMINAL struct sgttyb | |
57 | #endif | |
58 | ||
59 | struct monitor_ops *current_monitor; | |
60 | extern struct target_ops rom68k_ops; /* Forward declaration */ | |
61 | extern struct target_ops mon68_ops; /* Forward declaration */ | |
ae87844d | 62 | extern struct target_ops monitor_bug_ops; /* Forward declaration */ |
054240ec RS |
63 | extern struct monitor_ops rom68k_cmds; /* Forward declaration */ |
64 | extern struct monitor_ops mon68_cmds; /* Forward declaration */ | |
65 | extern struct monitor_ops bug_cmds; /* Forward declaration */ | |
66 | extern struct cmd_list_element *setlist; | |
67 | extern struct cmd_list_element *unsetlist; | |
68 | struct cmd_list_element *showlist; | |
69 | ||
70 | static void monitor_close(); | |
71 | static void monitor_fetch_register(); | |
72 | static void monitor_store_register(); | |
73 | static int kiodebug; /* flag set by "set remotedebug" */ | |
74 | static int hashmark; /* flag set by "set hash" */ | |
75 | ||
76 | #define LOG_FILE "monitor.log" | |
77 | #if defined (LOG_FILE) | |
78 | FILE *log_file; | |
79 | #endif | |
80 | ||
81 | static int timeout = 24; | |
82 | ||
5905161c RP |
83 | /* Descriptor for I/O to remote machine. Initialize it to NULL so that |
84 | monitor_open knows that we don't have a file open when the program starts. | |
85 | */ | |
86 | static serial_t monitor_desc = NULL; | |
054240ec RS |
87 | |
88 | /* Send data to monitor. Works just like printf. */ | |
89 | ||
90 | static void | |
91 | printf_monitor(va_alist) | |
92 | va_dcl | |
93 | { | |
94 | va_list args; | |
95 | char *pattern; | |
96 | char buf[200]; | |
97 | int i; | |
98 | ||
99 | va_start(args); | |
100 | ||
101 | pattern = va_arg(args, char *); | |
102 | ||
103 | vsprintf(buf, pattern, args); | |
104 | ||
1724c671 SG |
105 | if (SERIAL_WRITE(monitor_desc, buf, strlen(buf))) |
106 | fprintf(stderr, "SERIAL_WRITE failed: %s\n", safe_strerror(errno)); | |
054240ec RS |
107 | } |
108 | ||
109 | /* Read a character from the remote system, doing all the fancy | |
110 | timeout stuff. */ | |
111 | static int | |
112 | readchar(timeout) | |
113 | int timeout; | |
114 | { | |
115 | int c; | |
116 | ||
1724c671 | 117 | c = SERIAL_READCHAR(monitor_desc, timeout); |
054240ec RS |
118 | |
119 | if (kiodebug) | |
120 | putchar(c & 0x7f); | |
121 | ||
122 | #ifdef LOG_FILE | |
123 | if (isascii (c)) | |
124 | putc(c & 0x7f, log_file); | |
125 | #endif | |
126 | ||
127 | if (c >= 0) | |
128 | return c & 0x7f; | |
129 | ||
1724c671 | 130 | if (c == SERIAL_TIMEOUT) |
054240ec RS |
131 | { |
132 | if (timeout == 0) | |
133 | return c; /* Polls shouldn't generate timeout errors */ | |
134 | ||
135 | error("Timeout reading from remote system."); | |
136 | } | |
137 | ||
138 | perror_with_name("remote-monitor"); | |
139 | } | |
140 | ||
141 | /* Scan input from the remote system, until STRING is found. If DISCARD is | |
142 | non-zero, then discard non-matching input, else print it out. | |
143 | Let the user break out immediately. */ | |
144 | static void | |
145 | expect(string, discard) | |
146 | char *string; | |
147 | int discard; | |
148 | { | |
149 | char *p = string; | |
150 | int c; | |
151 | ||
152 | if (kiodebug) | |
153 | printf ("Expecting \"%s\"\n", string); | |
154 | ||
155 | immediate_quit = 1; | |
156 | while (1) | |
157 | { | |
158 | c = readchar(timeout); | |
159 | if (!isascii (c)) | |
160 | continue; | |
161 | if (c == *p++) | |
162 | { | |
163 | if (*p == '\0') | |
164 | { | |
165 | immediate_quit = 0; | |
166 | if (kiodebug) | |
167 | printf ("\nMatched\n"); | |
168 | return; | |
169 | } | |
170 | } | |
171 | else | |
172 | { | |
173 | if (!discard) | |
174 | { | |
175 | fwrite(string, 1, (p - 1) - string, stdout); | |
176 | putchar((char)c); | |
177 | fflush(stdout); | |
178 | } | |
179 | p = string; | |
180 | } | |
181 | } | |
182 | } | |
183 | ||
184 | /* Keep discarding input until we see the MONITOR prompt. | |
185 | ||
186 | The convention for dealing with the prompt is that you | |
187 | o give your command | |
188 | o *then* wait for the prompt. | |
189 | ||
190 | Thus the last thing that a procedure does with the serial line | |
191 | will be an expect_prompt(). Exception: monitor_resume does not | |
192 | wait for the prompt, because the terminal is being handed over | |
193 | to the inferior. However, the next thing which happens after that | |
194 | is a monitor_wait which does wait for the prompt. | |
195 | Note that this includes abnormal exit, e.g. error(). This is | |
196 | necessary to prevent getting into states from which we can't | |
197 | recover. */ | |
198 | static void | |
199 | expect_prompt(discard) | |
200 | int discard; | |
201 | { | |
202 | #if defined (LOG_FILE) | |
203 | /* This is a convenient place to do this. The idea is to do it often | |
204 | enough that we never lose much data if we terminate abnormally. */ | |
205 | fflush(log_file); | |
206 | #endif | |
207 | expect (PROMPT, discard); | |
208 | } | |
209 | ||
210 | /* Get a hex digit from the remote system & return its value. | |
211 | If ignore_space is nonzero, ignore spaces (not newline, tab, etc). */ | |
212 | static int | |
213 | get_hex_digit(ignore_space) | |
214 | int ignore_space; | |
215 | { | |
216 | int ch; | |
217 | while (1) | |
218 | { | |
219 | ch = readchar(timeout); | |
220 | if (ch >= '0' && ch <= '9') | |
221 | return ch - '0'; | |
222 | else if (ch >= 'A' && ch <= 'F') | |
223 | return ch - 'A' + 10; | |
224 | else if (ch >= 'a' && ch <= 'f') | |
225 | return ch - 'a' + 10; | |
226 | else if (ch == ' ' && ignore_space) | |
227 | ; | |
228 | else | |
229 | { | |
230 | expect_prompt(1); | |
231 | error("Invalid hex digit from remote system."); | |
232 | } | |
233 | } | |
234 | } | |
235 | ||
236 | /* Get a byte from monitor and put it in *BYT. Accept any number | |
237 | leading spaces. */ | |
238 | static void | |
239 | get_hex_byte (byt) | |
240 | char *byt; | |
241 | { | |
242 | int val; | |
243 | ||
244 | val = get_hex_digit (1) << 4; | |
245 | val |= get_hex_digit (0); | |
246 | *byt = val; | |
247 | } | |
248 | ||
249 | /* Get N 32-bit words from remote, each preceded by a space, | |
250 | and put them in registers starting at REGNO. */ | |
251 | static void | |
252 | get_hex_regs (n, regno) | |
253 | int n; | |
254 | int regno; | |
255 | { | |
256 | long val; | |
257 | int i; | |
258 | ||
259 | for (i = 0; i < n; i++) | |
260 | { | |
261 | int j; | |
262 | ||
263 | val = 0; | |
264 | for (j = 0; j < 8; j++) | |
265 | val = (val << 4) + get_hex_digit (j == 0); | |
266 | supply_register (regno++, (char *) &val); | |
267 | } | |
268 | } | |
269 | ||
270 | /* This is called not only when we first attach, but also when the | |
271 | user types "run" after having attached. */ | |
272 | static void | |
273 | monitor_create_inferior (execfile, args, env) | |
274 | char *execfile; | |
275 | char *args; | |
276 | char **env; | |
277 | { | |
278 | int entry_pt; | |
279 | ||
280 | if (args && *args) | |
281 | error("Can't pass arguments to remote MONITOR process"); | |
282 | ||
283 | if (execfile == 0 || exec_bfd == 0) | |
284 | error("No exec file specified"); | |
285 | ||
286 | entry_pt = (int) bfd_get_start_address (exec_bfd); | |
287 | ||
288 | #ifdef CREATE_INFERIOR_HOOK | |
289 | CREATE_INFERIOR_HOOK (0); /* No process-ID */ | |
290 | #endif | |
291 | #ifdef LOG_FILE | |
292 | fputs ("\nIn Create_inferior()", log_file); | |
293 | #endif | |
294 | ||
295 | /* The "process" (board) is already stopped awaiting our commands, and | |
296 | the program is already downloaded. We just set its PC and go. */ | |
297 | ||
298 | clear_proceed_status (); | |
299 | ||
300 | /* Tell wait_for_inferior that we've started a new process. */ | |
301 | init_wait_for_inferior (); | |
302 | ||
303 | /* Set up the "saved terminal modes" of the inferior | |
304 | based on what modes we are starting it with. */ | |
305 | target_terminal_init (); | |
306 | ||
307 | /* Install inferior's terminal modes. */ | |
308 | target_terminal_inferior (); | |
309 | ||
310 | /* insert_step_breakpoint (); FIXME, do we need this? */ | |
311 | proceed ((CORE_ADDR)entry_pt, -1, 0); /* Let 'er rip... */ | |
312 | } | |
313 | ||
314 | /* Open a connection to a remote debugger. | |
315 | NAME is the filename used for communication. */ | |
316 | ||
317 | static int baudrate = 9600; | |
318 | static char dev_name[100]; | |
319 | ||
320 | static void | |
1724c671 | 321 | general_open(args, name, from_tty) |
054240ec | 322 | char *args; |
1724c671 | 323 | char *name; |
054240ec RS |
324 | int from_tty; |
325 | { | |
60a60032 JK |
326 | if (args == NULL) |
327 | error ("Use `target %s DEVICE-NAME' to use a serial port, or \n\ | |
328 | `target %s HOST-NAME:PORT-NUMBER' to use a network connection.", name, name); | |
054240ec RS |
329 | |
330 | target_preopen(from_tty); | |
054240ec RS |
331 | |
332 | monitor_close(0); | |
333 | ||
1724c671 | 334 | monitor_desc = SERIAL_OPEN(dev_name); |
054240ec | 335 | |
5905161c | 336 | if (monitor_desc == NULL) |
1724c671 | 337 | perror_with_name(dev_name); |
054240ec | 338 | |
60a60032 JK |
339 | /* The baud rate was specified when GDB was started. */ |
340 | if (baud_rate) | |
341 | { | |
342 | int rate; | |
343 | ||
344 | if (sscanf (baud_rate, "%d", &rate) == 1) | |
345 | if (SERIAL_SETBAUDRATE (monitor_desc, rate)) | |
346 | { | |
347 | SERIAL_CLOSE (monitor_desc); | |
348 | perror_with_name (name); | |
349 | } | |
350 | } | |
054240ec | 351 | |
1724c671 | 352 | SERIAL_RAW(monitor_desc); |
054240ec RS |
353 | |
354 | #if defined (LOG_FILE) | |
355 | log_file = fopen (LOG_FILE, "w"); | |
356 | if (log_file == NULL) | |
357 | perror_with_name (LOG_FILE); | |
358 | #endif | |
359 | ||
360 | /* Hello? Are you there? */ | |
1724c671 | 361 | printf_monitor("\r"); /* CR wakes up monitor */ |
054240ec RS |
362 | |
363 | expect_prompt(1); | |
364 | ||
365 | if (from_tty) | |
366 | printf("Remote %s connected to %s\n", target_shortname, | |
367 | dev_name); | |
368 | } | |
369 | ||
370 | static void | |
1724c671 | 371 | rom68k_open(args, from_tty) |
054240ec RS |
372 | char *args; |
373 | int from_tty; | |
374 | { | |
1724c671 SG |
375 | push_target(&rom68k_ops); |
376 | push_monitor (&rom68k_cmds); | |
054240ec | 377 | |
1724c671 SG |
378 | general_open (args, "rom68k", from_tty); |
379 | } | |
054240ec | 380 | |
1724c671 SG |
381 | static void |
382 | mon68_open(args, from_tty) | |
383 | char *args; | |
384 | int from_tty; | |
385 | { | |
054240ec RS |
386 | push_target(&mon68_ops); |
387 | push_monitor (&mon68_cmds); | |
388 | ||
1724c671 | 389 | general_open (args, "mon68", from_tty); |
054240ec RS |
390 | } |
391 | ||
392 | static void | |
393 | bug_open(args, from_tty) | |
394 | char *args; | |
395 | int from_tty; | |
396 | { | |
ae87844d | 397 | push_target(&monitor_bug_ops); |
054240ec RS |
398 | push_monitor (&bug_cmds); |
399 | ||
1724c671 | 400 | general_open (args, "bug", from_tty); |
054240ec RS |
401 | } |
402 | ||
403 | /* | |
404 | * _close -- Close out all files and local state before this target loses control. | |
405 | */ | |
1724c671 | 406 | |
054240ec RS |
407 | static void |
408 | monitor_close (quitting) | |
409 | int quitting; | |
410 | { | |
1724c671 | 411 | SERIAL_CLOSE(monitor_desc); |
5905161c | 412 | monitor_desc = NULL; |
054240ec RS |
413 | |
414 | #if defined (LOG_FILE) | |
415 | if (log_file) { | |
416 | if (ferror(log_file)) | |
417 | fprintf(stderr, "Error writing log file.\n"); | |
418 | if (fclose(log_file) != 0) | |
419 | fprintf(stderr, "Error closing log file.\n"); | |
420 | } | |
421 | #endif | |
422 | } | |
423 | ||
424 | /* Terminate the open connection to the remote debugger. | |
425 | Use this when you want to detach and do something else | |
426 | with your gdb. */ | |
427 | static void | |
428 | monitor_detach (from_tty) | |
429 | int from_tty; | |
430 | { | |
431 | pop_target(); /* calls monitor_close to do the real work */ | |
432 | if (from_tty) | |
433 | printf ("Ending remote %s debugging\n", target_shortname); | |
434 | } | |
435 | ||
436 | /* | |
437 | * _resume -- Tell the remote machine to resume. | |
438 | */ | |
439 | static void | |
25286543 SG |
440 | monitor_resume (pid, step, sig) |
441 | int pid, step, sig; | |
054240ec RS |
442 | { |
443 | #ifdef LOG_FILE | |
444 | fprintf (log_file, "\nIn Resume (step=%d, sig=%d)\n", step, sig); | |
445 | #endif | |
446 | ||
447 | if (step) | |
448 | { | |
449 | printf_monitor (STEP_CMD); | |
450 | /* wait for the echo. */ | |
451 | expect (STEP_CMD, 1); | |
452 | } | |
453 | else | |
454 | { | |
455 | printf_monitor (GO_CMD); | |
456 | /* swallow the echo. */ | |
457 | expect (GO_CMD, 1); | |
458 | } | |
459 | } | |
460 | ||
461 | /* | |
462 | * _wait -- Wait until the remote machine stops, then return, | |
463 | * storing status in status just as `wait' would. | |
464 | */ | |
465 | ||
466 | static int | |
467 | monitor_wait (status) | |
468 | WAITTYPE *status; | |
469 | { | |
470 | int old_timeout = timeout; | |
471 | #ifdef LOG_FILE | |
472 | fputs ("\nIn wait ()", log_file); | |
473 | #endif | |
474 | ||
475 | WSETEXIT ((*status), 0); | |
476 | ||
477 | timeout = 0; /* Don't time out -- user program is running. */ | |
478 | ||
479 | expect_prompt(0); /* Wait for prompt, outputting extraneous text */ | |
480 | ||
481 | WSETSTOP ((*status), SIGTRAP); | |
482 | ||
483 | timeout = old_timeout; | |
484 | ||
485 | return 0; | |
486 | } | |
487 | ||
488 | /* Return the name of register number regno in the form input and output by | |
489 | monitor. Currently, register_names just happens to contain exactly what | |
490 | monitor wants. Lets take advantage of that just as long as possible! */ | |
491 | ||
492 | static char * | |
493 | get_reg_name (regno) | |
494 | int regno; | |
495 | { | |
496 | static char buf[50]; | |
497 | const char *p; | |
498 | char *b; | |
499 | ||
500 | b = buf; | |
501 | ||
502 | if (regno < 0) | |
503 | return (""); | |
504 | for (p = reg_names[regno]; *p; p++) | |
505 | *b++ = toupper(*p); | |
506 | *b = '\000'; | |
507 | ||
508 | return buf; | |
509 | } | |
510 | ||
511 | /* read the remote registers into the block regs. */ | |
512 | ||
513 | static void | |
514 | monitor_fetch_registers () | |
515 | { | |
516 | int regno; | |
517 | ||
518 | /* yeah yeah, i know this is horribly inefficient. but it isn't done | |
519 | very often... i'll clean it up later. */ | |
520 | ||
521 | for (regno = 0; regno <= PC_REGNUM; regno++) | |
522 | monitor_fetch_register(regno); | |
523 | } | |
524 | ||
525 | /* Fetch register REGNO, or all registers if REGNO is -1. | |
526 | Returns errno value. */ | |
527 | static void | |
528 | monitor_fetch_register (regno) | |
529 | int regno; | |
530 | { | |
531 | int val, j; | |
532 | ||
533 | #ifdef LOG_FILE | |
534 | fprintf (log_file, "\nIn Fetch Register (reg=%s)\n", get_reg_name (regno)); | |
535 | fflush (log_file); | |
536 | #endif | |
537 | ||
538 | if (regno < 0) | |
539 | { | |
540 | monitor_fetch_registers (); | |
541 | } | |
542 | else | |
543 | { | |
544 | char *name = get_reg_name (regno); | |
545 | printf_monitor (GET_REG, name); | |
546 | expect (name, 1); | |
547 | expect (REG_DELIM, 1); | |
548 | if (strcasecmp (name, "SR") == 0) | |
549 | { | |
550 | val = 0; | |
551 | for (j = 0; j < 4; j++) | |
552 | val = (val << 4) + get_hex_digit (j == 0); | |
553 | supply_register (regno, (char *) &val); | |
554 | } | |
555 | else | |
556 | { | |
557 | get_hex_regs (1, regno); | |
558 | } | |
559 | if (CMD_END) | |
560 | { | |
561 | expect (CMD_DELIM); | |
562 | printf_monitor (CMD_END); | |
563 | } | |
564 | expect_prompt (1); | |
565 | } | |
566 | return; | |
567 | } | |
568 | ||
569 | /* Store the remote registers from the contents of the block REGS. */ | |
570 | ||
571 | static void | |
572 | monitor_store_registers () | |
573 | { | |
574 | int regno; | |
575 | ||
576 | for (regno = 0; regno <= PC_REGNUM; regno++) | |
577 | monitor_store_register(regno); | |
578 | ||
579 | registers_changed (); | |
580 | } | |
581 | ||
582 | /* Store register REGNO, or all if REGNO == 0. | |
583 | return errno value. */ | |
584 | static void | |
585 | monitor_store_register (regno) | |
586 | int regno; | |
587 | { | |
588 | #ifdef LOG_FILE | |
589 | fprintf (log_file, "\nIn Store_register (regno=%d)\n", regno); | |
590 | #endif | |
591 | if (regno == -1) | |
592 | monitor_store_registers (); | |
593 | else | |
594 | { | |
595 | if (kiodebug) | |
596 | printf ("Setting register %s to 0x%x\n", get_reg_name (regno), read_register (regno)); | |
597 | ||
598 | printf_monitor (SET_REG, get_reg_name (regno), | |
599 | read_register (regno)); | |
600 | ||
601 | expect_prompt (1); | |
602 | } | |
603 | } | |
604 | ||
605 | /* Get ready to modify the registers array. On machines which store | |
606 | individual registers, this doesn't need to do anything. On machines | |
607 | which store all the registers in one fell swoop, this makes sure | |
608 | that registers contains all the registers from the program being | |
609 | debugged. */ | |
610 | ||
611 | static void | |
612 | monitor_prepare_to_store () | |
613 | { | |
614 | /* Do nothing, since we can store individual regs */ | |
615 | } | |
616 | ||
617 | static void | |
618 | monitor_files_info () | |
619 | { | |
620 | printf ("\tAttached to %s at %d baud.\n", | |
621 | dev_name, baudrate); | |
622 | } | |
623 | ||
624 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
625 | to inferior's memory at MEMADDR. Returns length moved. */ | |
626 | static int | |
627 | monitor_write_inferior_memory (memaddr, myaddr, len) | |
628 | CORE_ADDR memaddr; | |
629 | unsigned char *myaddr; | |
630 | int len; | |
631 | { | |
632 | int i; | |
633 | char buf[10]; | |
634 | ||
635 | #ifdef LOG_FILE | |
636 | fprintf (log_file, "\nIn Write_inferior_memory (memaddr=%x, len=%d)\n", memaddr, len); | |
637 | #endif | |
638 | for (i = 0; i < len; i++) | |
639 | { | |
640 | printf_monitor (MEM_SET_CMD, memaddr + i); | |
641 | expect (sprintf (buf, MEM_PROMPT, memaddr + i), 1); | |
642 | expect (CMD_DELIM); | |
643 | printf_monitor ("%x", myaddr[i]); | |
644 | if (kiodebug) | |
645 | printf ("\nSet 0x%x to 0x%x\n", memaddr + i, myaddr[i]); | |
646 | if (CMD_END) | |
647 | { | |
648 | /*** expect (sprintf (buf, MEM_PROMPT, memaddr + i +1), 1); | |
649 | expect (CMD_DELIM); ***/ | |
650 | printf_monitor (CMD_END); | |
651 | } | |
652 | expect_prompt (1); | |
653 | } | |
654 | return len; | |
655 | } | |
656 | ||
657 | /* Read LEN bytes from inferior memory at MEMADDR. Put the result | |
658 | at debugger address MYADDR. Returns length moved. */ | |
659 | static int | |
660 | monitor_read_inferior_memory(memaddr, myaddr, len) | |
661 | CORE_ADDR memaddr; | |
662 | char *myaddr; | |
663 | int len; | |
664 | { | |
665 | int i, j; | |
666 | char buf[20]; | |
667 | ||
668 | /* Number of bytes read so far. */ | |
669 | int count; | |
670 | ||
671 | /* Starting address of this pass. */ | |
672 | unsigned long startaddr; | |
673 | ||
674 | /* Number of bytes to read in this pass. */ | |
675 | int len_this_pass; | |
676 | ||
677 | #ifdef LOG_FILE | |
678 | fprintf (log_file, "\nIn Read_inferior_memory (memaddr=%x, len=%d)\n", memaddr, len); | |
679 | #endif | |
680 | ||
681 | /* Note that this code works correctly if startaddr is just less | |
682 | than UINT_MAX (well, really CORE_ADDR_MAX if there was such a | |
683 | thing). That is, something like | |
684 | monitor_read_bytes (CORE_ADDR_MAX - 4, foo, 4) | |
685 | works--it never adds len To memaddr and gets 0. */ | |
686 | /* However, something like | |
687 | monitor_read_bytes (CORE_ADDR_MAX - 3, foo, 4) | |
688 | doesn't need to work. Detect it and give up if there's an attempt | |
689 | to do that. */ | |
690 | if (((memaddr - 1) + len) < memaddr) { | |
691 | errno = EIO; | |
692 | return 0; | |
693 | } | |
694 | ||
695 | startaddr = memaddr; | |
696 | count = 0; | |
697 | while (count < len) | |
698 | { | |
699 | len_this_pass = 16; | |
700 | if ((startaddr % 16) != 0) | |
701 | len_this_pass -= startaddr % 16; | |
702 | if (len_this_pass > (len - count)) | |
703 | len_this_pass = (len - count); | |
704 | if (kiodebug) | |
705 | printf ("\nDisplay %d bytes at %x\n", len_this_pass, startaddr); | |
706 | ||
707 | for (i = 0; i < len_this_pass; i++) | |
708 | { | |
709 | printf_monitor (MEM_DIS_CMD, startaddr); | |
710 | expect (sprintf(buf, MEM_PROMPT, startaddr), 1); | |
711 | get_hex_byte (&myaddr[count++]); | |
712 | if (kiodebug) | |
713 | printf ("\nRead a 0x%x from 0x%x\n", myaddr[count-1], startaddr); | |
714 | if (CMD_END) | |
715 | { | |
716 | expect (CMD_DELIM); | |
717 | printf_monitor (CMD_END); | |
718 | } | |
719 | expect_prompt (1); | |
720 | startaddr += 1; | |
721 | } | |
722 | } | |
723 | return len; | |
724 | } | |
725 | ||
726 | /* FIXME-someday! merge these two. */ | |
727 | static int | |
728 | monitor_xfer_inferior_memory (memaddr, myaddr, len, write, target) | |
729 | CORE_ADDR memaddr; | |
730 | char *myaddr; | |
731 | int len; | |
732 | int write; | |
733 | struct target_ops *target; /* ignored */ | |
734 | { | |
735 | if (write) | |
736 | return monitor_write_inferior_memory (memaddr, myaddr, len); | |
737 | else | |
738 | return monitor_read_inferior_memory (memaddr, myaddr, len); | |
739 | } | |
740 | ||
741 | static void | |
742 | monitor_kill (args, from_tty) | |
743 | char *args; | |
744 | int from_tty; | |
745 | { | |
746 | return; /* ignore attempts to kill target system */ | |
747 | } | |
748 | ||
749 | /* Clean up when a program exits. | |
750 | The program actually lives on in the remote processor's RAM, and may be | |
751 | run again without a download. Don't leave it full of breakpoint | |
752 | instructions. */ | |
753 | ||
754 | static void | |
755 | monitor_mourn_inferior () | |
756 | { | |
757 | remove_breakpoints (); | |
758 | generic_mourn_inferior (); /* Do all the proper things now */ | |
759 | } | |
760 | ||
761 | #define MAX_MONITOR_BREAKPOINTS 16 | |
762 | ||
763 | extern int memory_breakpoint_size; | |
764 | static CORE_ADDR breakaddr[MAX_MONITOR_BREAKPOINTS] = {0}; | |
765 | ||
766 | static int | |
767 | monitor_insert_breakpoint (addr, shadow) | |
768 | CORE_ADDR addr; | |
769 | char *shadow; | |
770 | { | |
771 | int i; | |
772 | ||
773 | #ifdef LOG_FILE | |
774 | fprintf (log_file, "\nIn Insert_breakpoint (addr=%x)\n", addr); | |
775 | #endif | |
776 | for (i = 0; i <= MAX_MONITOR_BREAKPOINTS; i++) | |
777 | if (breakaddr[i] == 0) | |
778 | { | |
779 | breakaddr[i] = addr; | |
780 | if (kiodebug) | |
781 | printf ("Breakpoint at %x\n", addr); | |
782 | monitor_read_inferior_memory(addr, shadow, memory_breakpoint_size); | |
783 | printf_monitor(SET_BREAK_CMD, addr); | |
784 | expect_prompt(1); | |
785 | return 0; | |
786 | } | |
787 | ||
788 | fprintf(stderr, "Too many breakpoints (> 16) for monitor\n"); | |
789 | return 1; | |
790 | } | |
791 | ||
792 | /* | |
793 | * _remove_breakpoint -- Tell the monitor to remove a breakpoint | |
794 | */ | |
795 | static int | |
796 | monitor_remove_breakpoint (addr, shadow) | |
797 | CORE_ADDR addr; | |
798 | char *shadow; | |
799 | { | |
800 | int i; | |
801 | ||
802 | #ifdef LOG_FILE | |
803 | fprintf (log_file, "\nIn Remove_breakpoint (addr=%x)\n", addr); | |
804 | #endif | |
805 | for (i = 0; i < MAX_MONITOR_BREAKPOINTS; i++) | |
806 | if (breakaddr[i] == addr) | |
807 | { | |
808 | breakaddr[i] = 0; | |
809 | /* some monitors remove breakpoints based on the address */ | |
810 | if (strcasecmp (target_shortname, "bug") == 0) | |
811 | printf_monitor(CLR_BREAK_CMD, addr); | |
812 | else | |
813 | printf_monitor(CLR_BREAK_CMD, i); | |
814 | expect_prompt(1); | |
815 | return 0; | |
816 | } | |
817 | ||
818 | fprintf(stderr, "Can't find breakpoint associated with 0x%x\n", addr); | |
819 | return 1; | |
820 | } | |
821 | ||
822 | /* Load a file. This is usually an srecord, which is ascii. No | |
823 | protocol, just sent line by line. */ | |
824 | ||
825 | #define DOWNLOAD_LINE_SIZE 100 | |
826 | static void | |
827 | monitor_load (arg) | |
828 | char *arg; | |
829 | { | |
830 | FILE *download; | |
831 | char buf[DOWNLOAD_LINE_SIZE]; | |
832 | int i, bytes_read; | |
833 | ||
834 | if (kiodebug) | |
835 | printf ("Loading %s to monitor\n", arg); | |
836 | ||
837 | download = fopen (arg, "r"); | |
838 | if (download == NULL) | |
839 | { | |
840 | error (sprintf (buf, "%s Does not exist", arg)); | |
841 | return; | |
842 | } | |
843 | ||
844 | printf_monitor (LOAD_CMD); | |
845 | /* expect ("Waiting for S-records from host... ", 1); */ | |
846 | ||
847 | while (!feof (download)) | |
848 | { | |
849 | bytes_read = fread (buf, sizeof (char), DOWNLOAD_LINE_SIZE, download); | |
850 | if (hashmark) | |
851 | { | |
852 | putchar ('.'); | |
853 | fflush (stdout); | |
854 | } | |
855 | ||
1724c671 SG |
856 | if (SERIAL_WRITE(monitor_desc, buf, bytes_read)) { |
857 | fprintf(stderr, "SERIAL_WRITE failed: (while downloading) %s\n", safe_strerror(errno)); | |
054240ec RS |
858 | break; |
859 | } | |
860 | i = 0; | |
861 | while (i++ <=200000) {} ; /* Ugly HACK, probably needs flow control */ | |
862 | if (bytes_read < DOWNLOAD_LINE_SIZE) | |
863 | { | |
864 | if (!feof (download)) | |
865 | error ("Only read %d bytes\n", bytes_read); | |
866 | break; | |
867 | } | |
868 | } | |
869 | ||
870 | if (hashmark) | |
871 | { | |
872 | putchar ('\n'); | |
873 | } | |
874 | if (!feof (download)) | |
875 | error ("Never got EOF while downloading"); | |
876 | fclose (download); | |
877 | } | |
878 | ||
879 | /* Put a command string, in args, out to MONITOR. Output from MONITOR is placed | |
880 | on the users terminal until the prompt is seen. */ | |
881 | ||
882 | static void | |
883 | monitor_command (args, fromtty) | |
884 | char *args; | |
885 | int fromtty; | |
886 | { | |
887 | #ifdef LOG_FILE | |
888 | fprintf (log_file, "\nIn command (args=%s)\n", args); | |
889 | #endif | |
5905161c | 890 | if (monitor_desc == NULL) |
054240ec RS |
891 | error("monitor target not open."); |
892 | ||
893 | if (!args) | |
894 | error("Missing command."); | |
895 | ||
896 | printf_monitor("%s\r", args); | |
897 | expect_prompt(0); | |
898 | } | |
899 | ||
1724c671 SG |
900 | #if 0 |
901 | ||
054240ec RS |
902 | /* Connect the user directly to MONITOR. This command acts just like the |
903 | 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */ | |
904 | ||
905 | static struct ttystate ttystate; | |
906 | ||
907 | static void | |
908 | cleanup_tty() | |
909 | { printf("\r\n[Exiting connect mode]\r\n"); | |
1724c671 | 910 | /*SERIAL_RESTORE(0, &ttystate);*/ |
054240ec RS |
911 | } |
912 | ||
913 | static void | |
914 | connect_command (args, fromtty) | |
915 | char *args; | |
916 | int fromtty; | |
917 | { | |
918 | fd_set readfds; | |
919 | int numfds; | |
920 | int c; | |
921 | char cur_esc = 0; | |
922 | ||
923 | dont_repeat(); | |
924 | ||
5905161c | 925 | if (monitor_desc == NULL) |
054240ec RS |
926 | error("monitor target not open."); |
927 | ||
928 | if (args) | |
929 | fprintf("This command takes no args. They have been ignored.\n"); | |
930 | ||
931 | printf("[Entering connect mode. Use ~. or ~^D to escape]\n"); | |
932 | ||
933 | serial_raw(0, &ttystate); | |
934 | ||
935 | make_cleanup(cleanup_tty, 0); | |
936 | ||
937 | FD_ZERO(&readfds); | |
938 | ||
939 | while (1) | |
940 | { | |
941 | do | |
942 | { | |
943 | FD_SET(0, &readfds); | |
944 | FD_SET(monitor_desc, &readfds); | |
945 | numfds = select(sizeof(readfds)*8, &readfds, 0, 0, 0); | |
946 | } | |
947 | while (numfds == 0); | |
948 | ||
949 | if (numfds < 0) | |
950 | perror_with_name("select"); | |
951 | ||
952 | if (FD_ISSET(0, &readfds)) | |
953 | { /* tty input, send to monitor */ | |
954 | c = getchar(); | |
955 | if (c < 0) | |
956 | perror_with_name("connect"); | |
957 | ||
958 | printf_monitor("%c", c); | |
959 | switch (cur_esc) | |
960 | { | |
961 | case 0: | |
962 | if (c == '\r') | |
963 | cur_esc = c; | |
964 | break; | |
965 | case '\r': | |
966 | if (c == '~') | |
967 | cur_esc = c; | |
968 | else | |
969 | cur_esc = 0; | |
970 | break; | |
971 | case '~': | |
972 | if (c == '.' || c == '\004') | |
973 | return; | |
974 | else | |
975 | cur_esc = 0; | |
976 | } | |
977 | } | |
978 | ||
979 | if (FD_ISSET(monitor_desc, &readfds)) | |
980 | { | |
981 | while (1) | |
982 | { | |
983 | c = readchar(0); | |
984 | if (c < 0) | |
985 | break; | |
986 | putchar(c); | |
987 | } | |
988 | fflush(stdout); | |
989 | } | |
990 | } | |
991 | } | |
1724c671 | 992 | #endif |
054240ec RS |
993 | |
994 | /* | |
995 | * Define the monitor command strings. Since these are passed directly | |
996 | * through to a printf style function, we need can include formatting | |
997 | * strings. We also need a CR or LF on the end. | |
998 | */ | |
999 | struct monitor_ops rom68k_cmds = { | |
1000 | "go \r", /* execute or usually GO command */ | |
1001 | "go \r", /* continue command */ | |
1002 | "st \r", /* single step */ | |
1003 | "db %x\r", /* set a breakpoint */ | |
1004 | "cb %x\r", /* clear a breakpoint */ | |
1005 | "pm %x\r", /* set memory to a value */ | |
1006 | "pm %x\r", /* display memory */ | |
1007 | "-%08X ", /* prompt memory commands use */ | |
1008 | "pr %s %x\r", /* set a register */ | |
1009 | ": ", /* delimiter between registers */ | |
1010 | "pr %s\r", /* read a register */ | |
1011 | "dc \r", /* download command */ | |
1012 | "ROM68K :->", /* monitor command prompt */ | |
1013 | "=", /* end-of-command delimitor */ | |
1014 | ".\r" /* optional command terminator */ | |
1015 | }; | |
1016 | ||
1017 | struct monitor_ops bug_cmds = { | |
1018 | "go \r", /* execute or usually GO command */ | |
1019 | "go \r", /* continue command */ | |
1020 | "gn \r", /* single step */ | |
1021 | "br %x\r", /* set a breakpoint */ | |
1022 | "nobr %x\r", /* clear a breakpoint */ | |
1023 | "mm %x\r", /* set memory to a value */ | |
1024 | "mm %x\r", /* display memory */ | |
1025 | "%08X", /* prompt memory commands use */ | |
1026 | "rs %s %x\r", /* set a register */ | |
1027 | "=", /* delimiter between registers */ | |
1028 | "rm %s\r", /* read a register */ | |
1029 | "lo 0\r", /* download command */ | |
1030 | "Bug>", /* monitor command prompt */ | |
1031 | "? ", /* end-of-command delimitor */ | |
1032 | ".\r" /* optional command terminator */ | |
1033 | }; | |
1034 | ||
1035 | /* Define the target subroutine names */ | |
1036 | struct monitor_ops mon68_cmds = { | |
1037 | "", /* execute or usually GO command */ | |
1038 | "", /* continue command */ | |
1039 | "", /* single step */ | |
1040 | "", /* set a breakpoint */ | |
1041 | "", /* clear a breakpoint */ | |
1042 | "", /* set memory to a value */ | |
1043 | "", /* display memory */ | |
1044 | "", /* set a register */ | |
1045 | "", /* delimiter between registers */ | |
1046 | "", /* read a register */ | |
1047 | "", /* download command */ | |
1048 | ">", /* monitor command prompt */ | |
1049 | "", /* end-of-command delimitor */ | |
1050 | "" /* optional command terminator */ | |
1051 | }; | |
1052 | ||
1053 | struct target_ops rom68k_ops = { | |
1054 | "rom68k", | |
1055 | "Integrated System's ROM68K remote debug monitor", | |
60a60032 JK |
1056 | "Use a remote computer running the ROM68K debug monitor.\n\ |
1057 | Specify the serial device it is connected to (e.g. /dev/ttya).", | |
054240ec RS |
1058 | rom68k_open, |
1059 | monitor_close, | |
1060 | 0, | |
1061 | monitor_detach, | |
1062 | monitor_resume, | |
1063 | monitor_wait, | |
1064 | monitor_fetch_register, | |
1065 | monitor_store_register, | |
1066 | monitor_prepare_to_store, | |
1067 | monitor_xfer_inferior_memory, | |
1068 | monitor_files_info, | |
1069 | monitor_insert_breakpoint, | |
1070 | monitor_remove_breakpoint, /* Breakpoints */ | |
1071 | 0, | |
1072 | 0, | |
1073 | 0, | |
1074 | 0, | |
1075 | 0, /* Terminal handling */ | |
1076 | monitor_kill, | |
1077 | monitor_load, /* load */ | |
1078 | 0, /* lookup_symbol */ | |
1079 | monitor_create_inferior, | |
1080 | monitor_mourn_inferior, | |
1081 | 0, /* can_run */ | |
1082 | 0, /* notice_signals */ | |
1083 | process_stratum, | |
1084 | 0, /* next */ | |
1085 | 1, | |
1086 | 1, | |
1087 | 1, | |
1088 | 1, | |
1089 | 1, /* all mem, mem, stack, regs, exec */ | |
1090 | 0, | |
1091 | 0, /* Section pointers */ | |
1092 | OPS_MAGIC, /* Always the last thing */ | |
1093 | }; | |
1094 | ||
ae87844d | 1095 | struct target_ops monitor_bug_ops = { |
054240ec RS |
1096 | "bug", |
1097 | "Motorola's BUG remote serial debug monitor", | |
60a60032 JK |
1098 | "Use a remote computer running Motorola's BUG debug monitor.\n\ |
1099 | Specify the serial device it is connected to (e.g. /dev/ttya).", | |
054240ec RS |
1100 | bug_open, |
1101 | monitor_close, | |
1102 | 0, | |
1103 | monitor_detach, | |
1104 | monitor_resume, | |
1105 | monitor_wait, | |
1106 | monitor_fetch_register, | |
1107 | monitor_store_register, | |
1108 | monitor_prepare_to_store, | |
1109 | monitor_xfer_inferior_memory, | |
1110 | monitor_files_info, | |
1111 | monitor_insert_breakpoint, | |
1112 | monitor_remove_breakpoint, /* Breakpoints */ | |
1113 | 0, | |
1114 | 0, | |
1115 | 0, | |
1116 | 0, | |
1117 | 0, /* Terminal handling */ | |
1118 | monitor_kill, | |
1119 | monitor_load, /* load */ | |
1120 | 0, /* lookup_symbol */ | |
1121 | monitor_create_inferior, | |
1122 | monitor_mourn_inferior, | |
1123 | 0, /* can_run */ | |
1124 | 0, /* notice_signals */ | |
1125 | process_stratum, | |
1126 | 0, /* next */ | |
1127 | 1, | |
1128 | 1, | |
1129 | 1, | |
1130 | 1, | |
1131 | 1, /* all mem, mem, stack, regs, exec */ | |
1132 | 0, | |
1133 | 0, /* Section pointers */ | |
1134 | OPS_MAGIC, /* Always the last thing */ | |
1135 | }; | |
1136 | ||
1137 | struct target_ops mon68_ops = { | |
1138 | "mon68", | |
1139 | "Intermetric's MON68 remote serial debug monitor", | |
60a60032 JK |
1140 | "Use a remote computer running the MON68 debug monitor.\n\ |
1141 | Specify the serial device it is connected to (e.g. /dev/ttya).", | |
054240ec RS |
1142 | mon68_open, |
1143 | monitor_close, | |
1144 | 0, | |
1145 | monitor_detach, | |
1146 | monitor_resume, | |
1147 | monitor_wait, | |
1148 | monitor_fetch_register, | |
1149 | monitor_store_register, | |
1150 | monitor_prepare_to_store, | |
1151 | monitor_xfer_inferior_memory, | |
1152 | monitor_files_info, | |
1153 | monitor_insert_breakpoint, | |
1154 | monitor_remove_breakpoint, /* Breakpoints */ | |
1155 | 0, | |
1156 | 0, | |
1157 | 0, | |
1158 | 0, | |
1159 | 0, /* Terminal handling */ | |
1160 | monitor_kill, | |
1161 | monitor_load, /* load */ | |
1162 | 0, /* lookup_symbol */ | |
1163 | monitor_create_inferior, | |
1164 | monitor_mourn_inferior, | |
1165 | 0, /* can_run */ | |
1166 | 0, /* notice_signals */ | |
1167 | process_stratum, | |
1168 | 0, /* next */ | |
1169 | 1, | |
1170 | 1, | |
1171 | 1, | |
1172 | 1, | |
1173 | 1, /* all mem, mem, stack, regs, exec */ | |
1174 | 0, | |
1175 | 0, /* Section pointers */ | |
1176 | OPS_MAGIC, /* Always the last thing */ | |
1177 | }; | |
1178 | ||
1179 | void | |
1180 | _initialize_remote_monitors () | |
1181 | { | |
1182 | add_show_from_set ( | |
1183 | add_set_cmd ("remotedebug", no_class, var_boolean, | |
1184 | (char *)&kiodebug, | |
1185 | "Set debugging of I/O to a serial based Monitor.\n\ | |
1186 | When enabled, debugging info is displayed.", | |
1187 | &setlist), | |
1188 | &showlist); | |
1189 | add_show_from_set ( | |
1190 | add_set_cmd ("hash", no_class, var_boolean, | |
1191 | (char *)&hashmark, | |
1192 | "Set display of activity while downloading a file.\n\ | |
1193 | When enabled, a period \'.\' is displayed.", | |
1194 | &setlist), | |
1195 | &showlist); | |
1196 | ||
1197 | /* generic monitor command */ | |
1198 | add_com ("monitor <command>", class_obscure, monitor_command, | |
1199 | "Send a command to the debug monitor."); | |
60a60032 | 1200 | #if 0 |
054240ec RS |
1201 | add_com ("connect", class_obscure, connect_command, |
1202 | "Connect the terminal directly up to a serial based command monitor.\n\ | |
1203 | Use <CR>~. or <CR>~^D to break out."); | |
60a60032 | 1204 | #endif |
054240ec RS |
1205 | |
1206 | add_target (&rom68k_ops); | |
1207 | /* add_target (&mon68_ops); */ | |
ae87844d | 1208 | add_target (&monitor_bug_ops); |
054240ec | 1209 | } |